ADJUSTABLE BED WITH INTERNALIZED, NON-PROTRUSIVE LUMBAR-SUPPORT MECHANISM

Abstract

An adjustable bed with an internalized, non-protrusive lumbar-support mechanism is disclosed. The adjustable bed includes a frame structure with uplifted brackets that elevate seat platforms, creating a vertical space to house lumbar support mechanism without protruding below the bed's bottom plane. The lumbar mechanism includes a lumbar support member and a lumbar support lifting assembly mounted beneath the seat or back platforms. The bed frame structure may be foldable for storage and transport. Drive mechanisms independently adjust angles of back, seat, and leg platforms. The design allows the adjustable bed to lie flat for direct placement on traditional bed frames, improves aesthetics and protection of lumbar components, and simplifies packaging and logistics.

Claims

1. An adjustable bed, comprising: a frame structure comprising a base frame and an uplifted structure disposed on the base frame; a back lifting bracket having a first end pivotally connected to the base frame; a plurality of platforms comprising a back platform disposed on the back lifting bracket and a seat platform disposed on the uplifted structure; a back lifting actuator having a first end connected to the base frame and a second end connected to the back lifting bracket, wherein the back lifting actuator is configured to drive the back lifting bracket to pivot, thereby moving the back platform among a plurality of positions including a horizontal position; and a lumbar support mechanism comprising a first lumbar support unit comprising a first lumbar support member positioned above the seat platform; and a first lumbar lifting assembly positioned below a bottom side of the seat platform and operatively connected to the first lumbar support member, wherein the first lumbar lifting assembly is configured to drive the first lumbar support member to extend above or retract flush with the seat platform, wherein the uplifted structure is configured to elevate the seat platform to provide a vertical space within an elevated profile of the frame structure to accommodate the lumbar support mechanism entirely within the vertical space, thereby preventing outward protrusion.

2. The adjustable bed of claim 1, wherein the lumbar support mechanism further comprises a second lumbar support unit comprising a second lumbar support member positioned above the back platform and a second lumbar lifting assembly positioned below a bottom side of the back platform and operatively connected to the second lumbar support member, wherein the second lumbar lifting assembly is configured to drive the second lumbar support member to extend above or retract flush with the back platform.

3. The adjustable bed of claim 2, wherein the frame structure further comprises raised tabs disposed on the base frame to which the first end of the back lifting bracket is pivotally connected, wherein the raised tabs are configured such that when the back platform is in the horizontal position, the second lumbar lifting assembly is entirely housed in a vertical space provided between the back platform and the base frame without protruding below a bottom plane of the base frame.

4. The adjustable bed of claim 2, wherein each of the first lumbar lifting assembly and the second lumbar lifting assembly comprises: an electric linear actuator; and a linkage mechanism connected to the electric linear actuator and a respective lumbar support member of the first lumbar support member and the second lumbar support member; wherein the electric linear actuator is configured to actuate the linkage mechanism to move the respective lumbar support member.

5. The adjustable bed of claim 1, further comprising: a foot lifting bracket pivotally connected to the base frame; a foot lifting actuator having a first end connected to the base frame and a second end connected to the foot lifting bracket; and wherein the plurality of platforms further comprises a thigh platform disposed on the foot lifting bracket, and a leg platform pivotally disposed on the foot lifting bracket via an anti-pinch rod, wherein the foot lifting actuator is configured to drive the foot lifting bracket to pivot, thereby moving the thigh platform and the leg platform among a plurality of positions.

6. The adjustable bed of claim 5, wherein the foot lifting bracket comprises: a rear support beam; and at least one planar linkage assembly comprising a first linkage rod, a second linkage rod, and a connecting rod, the connecting rod having ends connected to the first and second linkage rods, wherein the first and second linkage rods are pivotally connected to the foot frame, and the rear support beam is connected to the first linkage rod.

7. The adjustable bed of claim 5, wherein the base frame comprises: a back frame; and a foot frame pivotally connected to the back frame; wherein the uplifted structure comprises a first uplifted structure disposed on a lower portion of the back frame, and a second uplifted structure disposed on an upper portion of the foot frame.

8. The adjustable bed of claim 7, wherein the seat platform comprises a first seat platform disposed on the first uplifted structure and a second seat platform disposed on the second uplifted structure, wherein the first lumbar support member is positioned above the first seat platform, and the first lumbar lifting assembly is disposed on the bottom side of the first seat platform.

9. The adjustable bed of claim 8, wherein the first uplifted structure elevates the first seat platform to provide the vertical space between the first seat platform and the back frame sufficient to entirely house the first lumbar lifting assembly without protruding below a bottom plane of the back frame.

10. The adjustable bed of claim 7, wherein the back lifting bracket is pivotally connected to the back frame, and the foot lifting bracket is pivotally connected to the foot frame.

11. An adjustable bed, comprising: a foldable frame structure having a back frame and a foot frame pivotally connected to enable a folded state and an unfolded state, and a first uplifted structure fixed to the back frame; a back lifting bracket having a first end pivotally connected to the back frame; a first seat platform supported by the first uplifted structure; a back platform pivotally coupled to the back frame of the frame structure via the back lifting bracket; a back lifting actuator operatively connected to the back lifting bracket to adjust an angle of the back platform; and a first lumbar support unit comprising a first lumbar support member positioned above the first seat platform; and a first lumbar lifting assembly disposed on a bottom side of the first seat platform and operatively connected to the first lumbar support member, wherein the first lumbar lifting assembly is configured to drive the first lumbar support member to extend above or retract flush with the first seat platform, wherein the first uplifted structure elevates the first seat platform to provide a vertical space between the first seat platform and the back frame sufficient to entirely house the first lumbar lifting assembly without protruding below a bottom plane of the back frame.

12. The adjustable bed of claim 11, further comprising a second lumbar support unit comprising a second lumbar support member positioned above the back platform and a second lumbar lifting assembly disposed on a bottom side of the back platform and operatively connected to the second lumbar support member, wherein the second lumbar lifting assembly is configured to drive the second lumbar support member to extend above or retract flush with the back platform.

13. The adjustable bed of claim 11, further comprising: a foot lifting bracket pivotally connected to the foot frame of the frame structure; a foot lifting actuator having a first end connected to the foot frame and a second end connected to the foot lifting bracket; a thigh platform disposed on the foot lifting bracket, and a leg platform pivotally disposed on the foot lifting bracket via an anti-pinch rod, wherein the foot lifting actuator is configured to drive the foot lifting bracket to pivot, thereby moving the thigh platform and the leg platform among a plurality of positions.

14. The adjustable bed of claim 13, wherein the foot lifting bracket comprises a four-bar linkage mechanism.

15. The adjustable bed of claim 14, wherein the foot lifting bracket comprises: a rear support beam; and at least one planar linkage assembly comprising a first linkage rod, a second linkage rod, and a connecting rod, the connecting rod having ends connected to the first and second linkage rods, wherein the first and second linkage rods are pivotally connected to the foot frame, and the rear support beam is connected to the first linkage rod.

16. The adjustable bed of claim 11, wherein in the unfolded state, a bottom profile of the bed formed by the frame structure is substantially planar, allowing the bed to be placed directly on a flat surface.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings illustrate one or more embodiments of the invention and, together with the written description, serve to explain the principles of the invention. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like elements of an embodiment.

[0031] FIG. 1 is an exploded perspective view of an adjustable bed with lumbar support in an unfolded state, according to one embodiment of the invention.

[0032] FIG. 2 is a structural side view of the adjustable bed of FIG. 1 in the unfolded state.

[0033] FIG. 3 is a detailed perspective view of a lumbar support unit of the adjustable bed of FIG. 1.

[0034] FIG. 4 is a side view of the adjustable bed of FIG. 1 in a folded state for storage or transport.

[0035] FIG. 5 is an exploded perspective view of an adjustable bed with lumbar support in an unfolded state, according to another embodiment of the invention.

[0036] FIG. 6 is one structural side view of the adjustable bed of FIG. 5 in the unfolded state.

[0037] FIG. 7 is another structural side view of the adjustable bed of FIG. 5 in the unfolded state.

[0038] FIG. 8 is one structural side view of the adjustable bed of FIG. 5 in a folded state for storage or transport.

[0039] FIG. 9 is another structural side view of the adjustable bed of FIG. 5 in a folded state for storage or transport.

DETAILED DESCRIPTION OF THE INVENTION

[0040] The invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals refer to like elements throughout.

[0041] The terms used in this specification generally have their ordinary meanings in the art, within the context of the invention, and in the specific context where each term is used. Certain terms that are used to describe the invention are discussed below, or elsewhere in the specification, to provide additional guidance to the practitioner regarding the description of the invention. For convenience, certain terms may be highlighted, for example using italics and/or quotation marks. The use of highlighting has no influence on the scope and meaning of a term; the scope and meaning of a term is the same, in the same context, whether or not it is highlighted. It will be appreciated that same thing can be said in more than one way. Consequently, alternative language and synonyms may be used for any one or more of the terms discussed herein, nor is any special significance to be placed upon whether or not a term is elaborated or discussed herein. Synonyms for certain terms are provided. A recital of one or more synonyms does not exclude the use of other synonyms. The use of examples anywhere in this specification including examples of any terms discussed herein is illustrative only, and in no way limits the scope and meaning of the invention or of any exemplified term. Likewise, the invention is not limited to various embodiments given in this specification.

[0042] It will be understood that when an element is referred to as being on another element, it can be directly on the other element or intervening elements may be present therebetween. In contrast, when an element is referred to as being directly on another element, there are no intervening elements present. As used herein, the term and/or includes any and all combinations of one or more of the associated listed items.

[0043] It will be understood that, although the terms first, second, third etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the invention.

[0044] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms a, an and the are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms comprises and/or comprising, or includes and/or including when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.

[0045] Furthermore, relative terms, such as lower or bottom and upper or top, may be used herein to describe one element's relationship to another element as illustrated in the Figures. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. For example, if the device in one of the figures is turned over, elements described as being on the lower side of other elements would then be oriented on upper sides of the other elements. The exemplary term lower, can therefore, encompasses both an orientation of lower and upper, depending of the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as below or beneath other elements would then be oriented above the other elements. The exemplary terms below or beneath can, therefore, encompass both an orientation of above and below.

[0046] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0047] It will be understood that when an element is referred to as being on, attached to, connected to, coupled with, contacting, etc., another element, it can be directly on, attached to, connected to, coupled with or contacting the other element or intervening elements may also be present. In contrast, when an element is referred to as being, for example, directly on, directly attached to, directly connected to, directly coupled with or directly contacting another element, there are no intervening elements present. It will also be appreciated by those of skill in the art that references to a structure or feature that is disposed adjacent another feature may have portions that overlap or underlie the adjacent feature.

[0048] As used herein, around, about, substantially or approximately shall generally mean within 20 percent, preferably within 10 percent, and more preferably within 5 percent of a given value or range. Numerical quantities given herein are approximate, meaning that the term around, aboutsubstantiallyor approximatelycan be inferred if not expressly stated.

[0049] As used in this specification, the term platform refers to a bed board, or a board or panel used for a bed.

[0050] As used in this specification, the phrase at least one of A, B, and C should be construed to mean a logical (A or B or C), using a non-exclusive logical OR. As used herein, the term and/or includes any and all combinations of one or more of the associated listed items.

[0051] Embodiments of the invention are illustrated in detail hereinafter with reference to accompanying drawings of FIGS. 1-9. The description below is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. The broad teachings of the invention can be implemented in a variety of forms. Therefore, while this invention includes particular examples, the true scope of the invention should not be so limited since other modifications will become apparent upon a study of the drawings, the specification, and the following claims. For purposes of clarity, the same reference numbers will be used in the drawings to identify similar elements. It should be understood that one or more steps within a method may be executed in different order (or concurrently) without altering the principles of the invention.

[0052] In accordance with the purposes of this invention, as embodied and broadly described herein, this invention, in one aspect, addresses deficiencies in existing adjustable beds with lumbar support. Conventionally, the lumbar support mechanisms are typically bulky and protrude from the bottom of the bed frame. This design leads to several problems: the bed cannot lie completely flat for direct use on a planar surface (e.g., atop a traditional bed frame); the protruding lumbar unit is exposed and vulnerable to damage without the protection of the bed frame; packaging and logistics are difficult due to the non-flat profile; and the overall aesthetic is compromised.

[0053] The adjustable bed includes a frame structure with integrated uplifted structures that elevate seat platforms, creating internal space to house lumbar support mechanisms without protruding below the bed's bottom plane. Each lumbar support mechanism includes a lumbar support member and a lumbar lifting assembly mounted beneath the seat or back platforms. The bed frame may be foldable for storage and transport. Drive mechanisms independently adjust back, seat, and leg platform angles. The design allows the bed to lie flat for direct placement on traditional bed frames, improves aesthetics and protection of lumbar components, and simplifies packaging and logistics.

[0054] In one aspect of the invention, the adjustable bed comprises a frame structure comprising a base frame and an uplifted structure disposed on the base frame; a back lifting bracket having a first end pivotally connected to the base frame; a plurality of platforms comprising a back platform disposed on the back lifting bracket and a seat platform disposed on the uplifted structure; a back lifting actuator having a first end connected to the base frame and a second end connected to the back lifting bracket, wherein the back lifting actuator is configured to drive the back lifting bracket to pivot, thereby moving the back platform among a plurality of positions including a horizontal position; and a lumbar support mechanism comprising a first lumbar support unit comprising a first lumbar support member positioned above the seat platform; and a first lumbar lifting assembly positioned below a bottom side of the seat platform and operatively connected to the first lumbar support member, wherein the first lumbar lifting assembly is configured to drive the first lumbar support member to extend above or retract flush with the seat platform.

[0055] The uplifted structure is configured to elevate the seat platform to provide a vertical space within an elevated profile of the frame structure to accommodate the lumbar support mechanism entirely within the vertical space, thereby preventing outward protrusion.

[0056] In one embodiment, the lumbar support mechanism further comprises a second lumbar support unit comprising a second lumbar support member positioned above the back platform and a second lumbar lifting assembly disposed on a bottom side of the back platform and operatively connected to the second lumbar support member, wherein the second lumbar lifting assembly is configured to drive the second lumbar support member to extend above or retract flush with the back platform.

[0057] In one embodiment, the frame structure further comprises raised tabs disposed on the base frame to which the first end of the back lifting bracket is pivotally connected, wherein the raised tabs are configured such that when the back platform is in the horizontal position, the second lumbar lifting assembly is entirely housed in a vertical space provided between the back platform and the base frame without protruding below a bottom plane of the base frame.

[0058] In one embodiment, each of the first lumbar lifting assembly and the second lumbar lifting assembly comprises an electric linear actuator; and a linkage mechanism connected to the electric linear actuator and a respective lumbar support member of the first lumbar support member and the second lumbar support member, wherein the electric linear actuator is configured to actuate the linkage mechanism to move the respective lumbar support member.

[0059] In one embodiment, the adjustable bed further comprises a foot lifting bracket pivotally connected to the base frame; a foot lifting actuator having a first end connected to the base frame and a second end connected to the foot lifting bracket, wherein the plurality of platforms further comprises a thigh platform disposed on the foot lifting bracket, and a leg platform pivotally disposed on the foot lifting bracket via an anti-pinch rod, wherein the foot lifting actuator is configured to drive the foot lifting bracket to pivot, thereby moving the thigh platform and the leg platform among a plurality of positions.

[0060] In one embodiment, the foot lifting bracket comprises a rear support beam; and at least one planar linkage assembly comprising a first linkage rod, a second linkage rod, and a connecting rod, the connecting rod having ends connected to the first and second linkage rods, wherein the first and second linkage rods are pivotally connected to the foot frame, and the rear support beam is connected to the first linkage rod.

[0061] In one embodiment, the base frame comprises a back frame; and a foot frame pivotally connected to the back frame, wherein the uplifted structure comprises a first uplifted structure disposed on a lower portion of the back frame, and a second uplifted structure disposed on an upper portion of the foot frame.

[0062] In one embodiment, the seat platform comprises a first seat platform disposed on the first uplifted structure and a second seat platform disposed on the second uplifted structure, wherein the first lumbar support member is positioned above the first seat platform, and the first lumbar lifting assembly is disposed on the bottom side of the first seat platform.

[0063] In one embodiment, the first uplifted structure elevates the first seat platform to provide the vertical space between the first seat platform and the back frame sufficient to entirely house the first lumbar lifting assembly without protruding below a bottom plane of the back frame.

[0064] In one embodiment, the back lifting bracket is pivotally connected to the back frame, and the foot lifting bracket is pivotally connected to the foot frame.

[0065] In another aspect of the invention, the adjustable bed comprises a foldable frame structure having a back frame and a foot frame pivotally connected to enable a folded state and an unfolded state, and a first uplifted structure fixed to the back frame; a back lifting bracket having a first end pivotally connected to the back frame; a first seat platform supported by the first uplifted structure; a back platform pivotally coupled to the back frame of the frame structure via the back lifting bracket; a back lifting actuator operatively connected to the back lifting bracket to adjust an angle of the back platform; and a first lumbar support unit comprising a first lumbar support member positioned above the first seat platform; and a first lumbar lifting assembly disposed on a bottom side of the first seat platform and operatively connected to the first lumbar support member, wherein the first lumbar lifting assembly is configured to drive the first lumbar support member to extend above or retract flush with the first seat platform. The first uplifted structure elevates the first seat platform to provide a vertical space between the first seat platform and the back frame sufficient to entirely house the first lumbar lifting assembly without protruding below a bottom plane of the back frame.

[0066] In one embodiment, the adjustable bed of claim 11, further comprising a second lumbar support unit comprising a second lumbar support member positioned above the back platform and a second lumbar lifting assembly disposed on a bottom side of the back platform and operatively connected to the second lumbar support member, wherein the second lumbar lifting assembly is configured to drive the second lumbar support member to extend above or retract flush with the back platform.

[0067] In one embodiment, the adjustable bed further comprises a foot lifting bracket pivotally connected to the foot frame of the frame structure; a foot lifting actuator having a first end connected to the foot frame and a second end connected to the foot lifting bracket; a thigh platform disposed on the foot lifting bracket, and a leg platform pivotally disposed on the foot lifting bracket via an anti-pinch rod, wherein the foot lifting actuator is configured to drive the foot lifting bracket to pivot, thereby moving the thigh platform and the leg platform among a plurality of positions.

[0068] In one embodiment, the foot lifting bracket comprises a four-bar linkage mechanism.

[0069] In one embodiment, the foot lifting bracket comprises a rear support beam; and at least one planar linkage assembly comprising a first linkage rod, a second linkage rod, and a connecting rod, the connecting rod having ends connected to the first and second linkage rods, wherein the first and second linkage rods are pivotally connected to the foot frame, and the rear support beam is connected to the first linkage rod.

[0070] In one embodiment, in the unfolded state, a bottom profile of the bed formed by the frame structure is substantially planar, allowing the bed to be placed directly on a flat surface.

[0071] In yet another aspect, the invention relates to a method for providing lumbar support in an adjustable bed, comprising providing a bed frame with an integrated lift structure that elevates a seat platform portion; housing a lumbar lifting assembly entirely within a space between the elevated seat platform and the bed frame such that no part of the lumbar lifting assembly extends below a lowest horizontal member of the bed frame when retracted; pivotally supporting a back platform relative to the bed frame via a transmission linkage; and independently operating the lumbar lifting assembly to raise a lumbar support member from the seat platform and operating a drive member to adjust an angle of the back platform via the transmission linkage.

[0072] The core of the invention lies in integrating an uplifted structure (e.g., first uplifted structure 122 and optionally a second uplifted structure 422) into the support frame structure. The uplifted structure elevates the seat platform(s), creating sufficient vertical space within the elevated profile of the bed frame structure to house the entire lumbar support mechanism(s)/unit(s). This allows the lumbar support units to be installed without protruding below the bottom plane of the frame structure.

[0073] The inventive steps / key features of the invention are as follows.

[0074] Integration of uplifted structures: The addition of dedicated uplifted structures (122, 422) to the main support frame (1, 4) is a key structural modification that enables the primary benefit.

[0075] Internalized lumbar unit: The lumbar lifting/driving assembly (92) is mounted to the bottom of the elevated seat platform (82), and the lumbar support member (91) is above it, with the entire mechanism contained within the vertical space defined by the uplifted structure and seat platform.

[0076] Dual Lumbar support: The concept is extended by optionally placing a second lumbar unit under the back platform (81).

[0077] Foldable frame: The support frame structure is split into hinged front/back (1) and rear/foot (4) sections, allowing the bed to fold for storage and transport, a feature enhanced by the now-flat bottom profile.

[0078] Coordinated mechanism: The lumbar support unit uses an electric actuator (921) coupled with a linkage mechanism (925, 926, etc.) to smoothly raise and lower the lumbar support member.

[0079] Multi-section platforms: The support platform (8) is divided into multiple sections (back platform 81, first seat platform 82, second seat platform 83, lower limb platform 84) driven by separate actuators and linkage systems (back lifting bracket 2 and foot lifting bracket 52) for independent adjustment of back, seat, and leg positions.

[0080] The invention provides the following advantages and benefits.

[0081] Flat bottom profile: The bed can lie completely flat, enabling direct placement on traditional bed frames or the floor.

[0082] Improved protection and aesthetics: The lumbar mechanism is protected within the bed frame, improving durability and creating a cleaner, more uniform appearance.

[0083] Easier packaging and logistics: The flat, non-protruding shape simplifies packaging, reduces material use, and facilitates stacking and transport. The foldable frame further aids storage.

[0084] Enhanced functionality: Provides independent adjustment of backrest and leg sections, along with customizable lumbar support in one or more zones, improving user comfort.

[0085] Safety: Features like the anti-pinch rod (524) on the leg section enhance safety during operation.

[0086] These and other aspects of the invention are further described below. Without intent to limit the scope of the invention, exemplary embodiments of the invention are given below.

[0087] As shown in FIGS. 1-4, an embodiment of an adjustable bed with integrated lumbar support is disclosed. The adjustable bed is designed to provide adjustable positioning and lumbar support while maintaining a low, flat profile for versatility, protection, and ease of handling.

[0088] Referring to FIGS. 1 and 2, the adjustable bed includes a primary frame structure. In a preferred embodiment, the frame structure is segmented and foldable, comprising a back frame 1 and a foot frame 4. The back and foot frames 1 and 4 are pivotally connected at a hinge junction, for example, via a connection assembly 6 having a central connection beam 61 and connection brackets 62. This allows the bed to pivot between an unfolded state (FIGS. 1-2) for use and a folded state (FIG. 4) for compact storage or transport.

[0089] The back frame 1 may include a cross beam 11, two back side rails 12, and optionally a reinforcement beam 13 extending between the back side rails 12 for added structural integrity. Similarly, the foot frame 4 may include a cross beam 41 and two foot side rails 42.

[0090] A key feature of the invention is the incorporation of one or more uplifted structures. In one embodiment, at least one first uplifted structure 122 is fixedly attached to, or integrally formed with, the back frame 1, typically extending upward from a lower portion of each back side rail 12. Optionally, one or more second uplifted structures 422 may be similarly attached to an upper portion of the foot side rails 42. These uplifted structures 122, 422 serve to elevate respective seat platforms above the primary plane of the frame structure.

[0091] A plurality of platforms 8 provides the user support surface and is divided into multiple articulating sections. It includes a back platform 81, a first seat platform 82, and, in embodiments with a rear section, a second seat platform 83 and a lower limb platform 84. The first seat platform 82 is mounted upon and supported by the first uplifted structure(s) 122. The second seat platform 83, if present, is mounted upon the second uplifted structure(s) 422. This elevated mounting is fundamental to the invention.

[0092] A back lifting bracket 2 is pivotally connected at one end to the back frame 1, for example, via pivots on back connection protrusions (raised tabs) 121 on the back side rails 12. The back platform 81 is fixedly mounted atop the back lifting bracket 2. A back lifting actuator 3, such as an electric linear actuator, has one end pivotally connected to the back frame 1 (e.g., to the back reinforcement beam 13) and its opposite end connected to the back lifting bracket 2 (e.g., to a back support beam 21). Extension and retraction of the back lifting actuator 3 causes the back lifting bracket 2 to pivot, thereby raising or lowering the back platform 81 through a range of positions, including a horizontal position flush with the seat platforms.

[0093] A lumbar support unit 9 is a central innovative component. As best seen in FIG. 3, the unit 9 comprises a lumbar support member 91 and a lumbar lifting assembly 92. In a primary configuration, the lumbar lifting assembly 92 is mounted to the underside of the first seat platform 82 so that the lumbar lifting assembly 92 is entirely accommodated with the vertical space defined within an elevated profile of the frame structure that is below the first seat platform 82. In another embodiment, the lumbar lifting assembly 92 is mounted to the back frame 1 so that the lumbar lifting assembly 92 is entirely accommodated with the vertical space defined within an elevated profile of the frame structure that is below the first seat platform 82. The lumbar support member 91 is positioned on the top side of the first seat platform 82, typically within a recess or aperture, and is operatively connected to the lumbar lifting assembly 92 through the platform. The lumbar lifting assembly 92 includes a lumbar electric actuator 921 and a linkage mechanism. The linkage mechanism may comprise components such as a fixed channel 922, a pivot pin 923 with sliding rollers 924, a first link 925, a second link 926, and a fixed block 927. Actuation of the lumbar electric actuator 921 drives the linkage, which translates motion to the lumbar support member 91, causing it to rise above the plane of the first seat platform 82 for support or retract to be flush with it. A connecting rod 928 may synchronize two such linkage assemblies on a single lumbar support member.

[0094] Crucially, because the first seat platform 82 is elevated by the first uplifted structure 122, the vertical space created between the platform 82 and the lower part of the back frame 1 is sufficient to fully contain the entire lumbar lifting assembly 92. No part of the lumbar mechanism protrudes below the lowest point of the main frame structure 1, 4 when retracted, resulting in a flat bed bottom.

[0095] In one embodiment, a second, identical or similar lumbar support unit 9 can be installed under the back platform 81, with its lumbar lifting assembly 92 mounted to the underside of the back platform 81 (or the back lifting bracket 2) and its lumbar support member 91 integrated into the back platform 81 surface. This provides adjustable lumbar support in the backrest area as well.

[0096] For leg support, a foot lifting bracket 5 is pivotally connected to the foot frame 4. The lower limb platform 84 is attached on the foot lifting bracket 5. The foot lifting bracket 5 may employ a planar linkage assembly 52, such as a four-bar linkage comprising a first swing link 521, a connecting rod 522, and a second swing link 523, pivotally connected to rear connection protrusions (raised tabs) 421 on the foot side rails 42. A foot lifting actuator 7 (e.g., another electric actuator) connected between the foot frame 4 and a foot support beam 51 of the foot lifting bracket 5 drives the lower limb platform 84 between positions. The leg platform 84 may itself be subdivided into a thigh platform 841 and a leg platform 842. A safety feature, such as an anti-pinch rod 524, may pivotally connect the calf platform 842 to the connecting rod 522 to prevent pinching hazards during adjustment.

[0097] In operation, a controller (not shown) activates the back lifting actuator 3 to adjust the back platform 81 to a desired angle for reading, watching TV, or sleeping flat. Independently, the lumbar electric actuator 921 is activated to raise the lumbar support member 91 within the first seat platform 82 (or back platform 81) to provide customized lower back support. The foot lifting actuator 7 can be activated to elevate the lower limb platform 84 for zero-gravity or therapeutic positions. When not in use, all platforms can be returned to a horizontal plane, and all lumbar support members retracted. In this state, the entire underside of the bed is flat, allowing it to be placed securely on a conventional bed frame. For moving or storage, the bed can be folded at the hinge between the front and foot frames 1, 4, as shown in FIG. 4, taking advantage of its flat, stackable profile.

[0098] Specifically, when the adjustable bed with lumbar support of the invention is in use, the back lifting actuator 3 drives the back lifting bracket 2 to rotate, causing the back platform 81 to rotate to various positions including a horizontal position. At the horizontal position, it meets the user's need for a supine sleeping posture, and the back lifting bracket 2 rotates to a horizontal position and rests on the back frame 1, with the back frame 1 providing support. At this time, the lumbar support member 91 retracts to fit flush with the first seat platform 82. For other various positions, the back platform 81 rotates to different angles to adapt to different user habits and scenarios, and the lumbar support driving assembly 92 drives the lumbar support member 91 to lift and protrude from the first seat platform 82 for adaptation, thereby enhancing the user experience. Furthermore, the first uplifted structure 122 elevates the entire first seat platform 82, allowing the support frame to have sufficient thickness to install the lumbar support unit 9, preventing the lumbar support unit 9 from protruding from the bottom of the support frame. This improves aesthetics, enables the adjustable bed with lumbar support to be used directly on a flat surface, allows it to be placed flat on a traditional bed, reduces the barrier to use, makes the overall shape more symmetrical, and facilitates packaging and logistics. It can be seen that the adjustable bed with lumbar support of the invention elevates the entire first seat platform 82 through the first uplifted structure 122, ensuring the required thickness for the support frame to install the lumbar support unit 9 and avoiding protrusion of the lumbar support unit 9. This solves the problems in the prior art caused by protruding lumbar supports in adjustable beds, such as inability to use directly on a flat surface, lack of bed frame protection, difficulty in packaging, and insufficient aesthetics.

[0099] In some embodiments, as shown in FIGS. 1 and 2, the adjustable bed with lumbar support comprises two lumbar support units 9; the lumbar support driving assembly 92 of the other lumbar support unit 9 is arranged at the bottom of the back platform 81 and connected to the lumbar support member 91 located above the back platform 81; the lumbar support driving assembly 92 drives the lumbar support member 91 to lift and protrude from the back platform 81 or retract to fit flush with the back platform 81.

[0100] In some embodiments, as shown in FIGS. 1 and 2, the back frame 1 is further provided with a reinforcement beam 13, two ends of which are respectively connected to the back side rails 12; one end of the back lifting actuator 3 is hinged to the support beam 21, and the other end is hinged to the front reinforcement beam 13.

[0101] In some embodiments, as shown in FIGS. 1 and 2, the support frame comprises a back frame 1 and a foot frame 4; one end of the back frame 1 is hinged to one end of the foot frame 4, one end of the back lifting bracket 2 is hinged to the middle of the back frame 1, and the first uplifted structure 122 is arranged on the rear side of the back frame 1; rotating the back frame 1 or the foot frame 4 about the hinge point between the back frame 1 and the foot frame 4 switches the adjustable bed with lumbar support between an unfolded state and a folded state, where the unfolded state meets the user's normal reclining needs, and the folded state further meets the user's storage and logistics needs, as shown in FIG. 4.

[0102] In some embodiments, as shown in FIG. 3, the lumbar support driving assembly 92 comprises a lumbar support electric actuator 921 and a lumbar support linkage mechanism connected thereto; one end of the lumbar support electric actuator 921 is hinged to the lumbar support member 91, and the other end is hinged to the lumbar support linkage mechanism; the lumbar support linkage mechanism is connected to the lumbar support member 91; the lumbar support electric actuator 921 pushes the lumbar support linkage mechanism, thereby driving the lumbar support member 91 to move.

[0103] In some embodiments, as shown in FIGS. 1 and 2, the lumbar support linkage mechanism comprises a fixed groove 922, an axle pin 923, a sliding wheel 924, a first linkage rod 925, a second linkage rod 926, and a fixed base 927. The fixed groove 922 is fixed to the back side of the lumbar support member 91. One end of the first linkage rod 925 is hinged to the lumbar support electric actuator 921 via the axle pin 923. Simultaneously, each end of the axle pin 923 is provided with a rotatable sliding wheel 924, and the sliding wheel 924 is slidably arranged on the fixed groove 922. One end of the second linkage rod 926 is hinged to the other end of the fixed groove 922 relative to the sliding wheel 924. The other end of the second linkage rod 926 is hinged to the middle of the first linkage rod 925. The other end of the first linkage rod 925 is hinged to the fixed base 927, and the other end of the fixed base 927 is fixed to the lumbar support member 91. Further, in this embodiment, as shown in FIGS. 1 and 2, the lumbar support linkage mechanism comprises two sets in total. The axle pins 923 of the two sets of lumbar support linkage mechanisms are connected via a connection rod 928 for transmission. The first linkage rod 925 of one set of the lumbar support linkage mechanism moves within its fixed groove 922 driven by the lumbar support electric actuator 921, thereby driving the axle pin 923 to move the connection rod 928, which in turn drives the first linkage rod 925 at the other end to move within its fixed groove 922. Thus, the two fixed bases 927 lift simultaneously, providing a more stable lifting force to the lumbar support member 91.

[0104] In some embodiments, as shown in FIGS. 1 and 2, the middle of the back frame 1 is provided with a front connection protrusion 121; one end of the back lifting bracket 2 is hinged to the front connection protrusion 121. The front connection protrusion 121 assists in lifting the front transmission rod, thereby lifting the back platform 81 arranged on the front transmission rod, making the back platform 81 flush with the first seat platform 82.

[0105] In some embodiments, as shown in FIGS. 1 and 2, the back frame 1 comprises a cross beam 11 and two back side rails 12; two ends of the front cross beam 11 are respectively perpendicularly connected to one end of the two back side rails 12. Furthermore, in this embodiment, the adjustable bed with lumbar support comprises two front lifting frames 122 in total, which are respectively arranged on the rear sides of the back side rails 12. The first seat platform 82 is respectively connected to the two front lifting frames 122. More specifically, there are two front connection protrusions 121 in total, respectively arranged in the middle of the two back side rails 12.

[0106] In some embodiments, as shown in FIGS. 1 and 2, the back lifting bracket 2 comprises a support beam 21 and two back support arms/rods 22; two ends of the front support beam 21 are respectively perpendicularly connected to one end of the two back support rods 22; the other ends of the two back support rods 22 are respectively hinged to the middle of the corresponding back side rails 12.

[0107] In some embodiments, as shown in FIGS. 1 and 2, the adjustable bed with lumbar support further comprises a foot lifting bracket 5 and a foot lifting actuator 7; one end of the foot lifting actuator 7 is connected to the foot frame 4, and the other end is connected to the foot lifting bracket 5 ; the support platform 8 further comprises a lower limb platform 84 arranged on the foot lifting bracket 5 ; the foot lifting actuator 7 drives the foot lifting bracket 5 to rotate, thereby driving the lower limb platform 84 to rotate to various positions including a horizontal position.

[0108] In some embodiments, as shown in FIGS. 1 and 2, one end of the foot lifting actuator 7 is hinged to the rear support beam 51, and the other end is hinged to the rear cross beam 41.

[0109] In some embodiments, as shown in FIGS. 1 and 2, the foot frame 4 comprises a rear cross beam 41 and two foot side rails 42; two ends of the rear cross beam 41 are respectively perpendicularly connected to one end of the two foot side rails 42.

[0110] In some embodiments, as shown in FIGS. 1 and 2, the foot lifting bracket 5 comprises a rear support beam 51 and two sets of planar linkage assemblies 52. The planar linkage assembly 52 comprises a first link rod 521, a connecting rod 522, and a second link rod 523. Two ends of the connecting rod 522 are respectively connected to one end of the first link rod 521 and the second link rod 523. The other ends of the first link rod 521 and the second link rod 523 are hinged to the foot side rails 42. Two ends of the rear support beam 51 are respectively connected to the two first link rods 521. In this embodiment, the two foot side rails 42 are each provided with two connection protrusions 421. The other ends of the first link rod 521 and the second link rod 523 are connected to the foot side rails 42 by being hinged to the rear connection protrusions 421. The rear connection protrusions 421 assist in lifting the planar linkage assembly 52, thereby lifting the lower limb platform 84 arranged on the planar linkage assembly 52, allowing the components of the support platform 8 to remain level.

[0111] In some embodiments, as shown in FIGS. 1 and 2, the lower limb platform 84 comprises a thigh platform 841 and a calf platform 842. Two ends of the thigh platform 841 are respectively arranged on the two first link rods 521. Two ends of the calf platform 842 are respectively arranged on the two connecting rods 522. The thigh platform 841 and calf platform 842 are used to provide support at different angles for the user's thighs and calves respectively, further enriching usage scenarios and enhancing the user's experience.

[0112] In some embodiments, as shown in FIGS. 1 and 2, the planar linkage assembly 52 further comprises an anti-pinch rod 524. One end of the anti-pinch rod 524 is hinged to the connecting rod 522. Two ends of the calf platform 842 are fixed to the anti-pinch rod 524. The calf platform 842 is arranged on the connecting rod 522 by being fixed to the anti-pinch rod 524. The anti-pinch rod 524 allows the calf platform 842 to be supported by the connecting rod 522 while also being able to rotate freely about one end of the anti-pinch rod 524. This prevents collisions with surrounding objects or even pinching the user during the rotation of the calf support platform 8 driven by the foot lifting actuator 7.

[0113] In some embodiments, as shown in FIGS. 1 and 2, the adjustable bed with lumbar support further comprises a connection assembly 6. The connection assembly 6 comprises a central connection beam 61 and connection brackets 62 arranged at both ends of the central connection beam 61. The back frame 1 and the foot frame 4 are respectively hinged to the connection brackets 62, thereby realizing the hinged connection between the back frame 1 and the foot frame 4.

[0114] In some embodiments, as shown in FIGS. 1 and 2, the front side of the foot frame 4 is provided with two second uplifted structures 422, which are respectively arranged on the front sides of the foot side rails 42. The support platform 8 further comprises a second seat platform 83, which is arranged on the two second uplifted structures 422.

[0115] FIGS. 5-9 shows an adjustable bed with lumbar support according to another embodiment of the invention. The adjustable bed shown in FIGS. 5-9 is essentially similar to that of FIGS. 1-4, except that the back frame 1 has a narrow width relative to that of the foot frame 4 and a two-part connection bracket 6 pivotally connected the back frame 1 and the foot frame 4 such that when the bed is in a folded state (FIGS. 8-9), the back side rails 12 of the back frame 1 is received in a space provided between the foot side rails 42 of the foot frame 4 (FIG. 8). The operation of the adjustable bed shown in FIGS. 5-9 is same as that of FIGS. 1-4 as disclosed above.

[0116] The invention thus provides a multifunctional, user-friendly adjustable bed that overcomes the aesthetic, functional, and logistical shortcomings of prior art designs.

[0117] In sum, the adjustable bed with lumbar support of the invention has the following advantages:

[0118] Multi-functional adjustment: The back platform 81 and first seat platform 82 of the bed can rotate to various positions, including a horizontal position, to adapt to different users'sleeping postures and usage habits. Additionally, the lumbar support unit 9 can lift or retract to adapt to different users'lumbar support needs.

[0119] Structural optimization: The design of the first uplifted structure 122 elevates the entire first seat platform 82, ensuring the required thickness for the support frame to install the lumbar support unit 9 and avoiding protrusion of the lumbar support unit 9, improving aesthetics and practicality. The support frame comprising the back frame 1 and foot frame 4 allows the bed to switch between unfolded and folded states, meeting usage and storage needs.

[0120] Dual lumbar support unit design: In addition to the lumbar support unit 9 on the first seat platform 82, a lumbar support unit 9 is also provided on the back platform 81, offering more comprehensive lumbar support.

[0121] Linkage mechanism design: The lumbar support driving assembly 92 adopts a lumbar support electric actuator 921 and a lumbar support linkage mechanism to achieve smooth lifting action of the lumbar support member 91.

[0122] Enhanced safety: The anti-pinch rod 524 design prevents collisions with surrounding objects or pinching of the user during the rotation of the support platform 8.

[0123] Improved comfort: The lower limb platform 84 includes a thigh platform 841 and a calf platform 842, providing support at different angles for the user's thighs and calves, enriching usage scenarios.

[0124] Easy installation and logistics: The design allows the adjustable bed with lumbar support to be placed flat directly on a traditional bed, reducing the barrier to use and facilitating packaging and logistics.

[0125] The foregoing description of the exemplary embodiments of the invention has been presented only for the purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching.

[0126] The embodiments were chosen and described in order to explain the principles of the invention and their practical application so as to enable others skilled in the art to utilize the invention and various embodiments and with various modifications as are suited to the particular use contemplated. Alternative embodiments will become apparent to those skilled in the art to which the invention pertains without departing from its spirit and scope. Accordingly, the scope of the invention is defined by the appended claims rather than the foregoing description and the exemplary embodiments described therein.