HEIGHT-ADJUSTABLE FOLDING CHAIR

Abstract

A height-adjustable folding chair comprises a first support, a second support, and a seat plate. A middle section of the first support is connected to a middle section of the second support through a hinge shaft, a lower section of the first support and a lower section of the second support each have a bending angle, and two ends of the seat plate are pivotally secured with a first support upper cross rod and a second support upper cross rod respectively. The seat plate has a side A and a side B. When the first support and the second support are unfolded in an X shape, a bent section of the first support and a bent section of the second support are bent facing each other or are bent facing away from each other.

Claims

1. A height-adjustable folding chair, comprising a first support, a second support, and a seat plate, wherein a middle section of the first support is connected to a middle section of the second support through a hinge shaft, a lower section of the first support and a lower section of the second support each have a bending angle, and two ends of the seat plate are pivotally secured with a first support upper cross rod and a second support upper cross rod respectively; the seat plate has a side A and a side B facing away from the side A; and when the first support and the second support are unfolded in an X shape, a bent section of the first support and a bent section of the second support are bent facing each other, in which case the side B of the seat plate faces upwards, or the bent section of the first support and the bent section of the second support are bent facing away from each other, in which case the side A of the seat plate faces upwards.

2. The height-adjustable folding chair according to claim 1, wherein the seat plate is a soft-body seat plate comprising two tubes and a soft connecting body, the two tubes are coupled and fixed to the first support upper cross rod and the second support upper cross rod respectively, and two ends of the soft connecting body are connected to the two tubes respectively.

3. The height-adjustable folding chair according to claim 1, wherein the seat plate is a hinge seat plate comprising a front plate and a rear plate, a front end of the front plate is pivotally secured with the first support upper cross rod, a rear end of the rear plate is pivotally secured with the second support upper cross rod, a rear end of the front plate and a front end of the rear plate have square wave shapes engaging each other, and engaging portions are connected to each other through a transverse hinge shaft.

4. The height-adjustable folding chair according to claim 1, wherein the seat plate is a sliding seat plate which is a rigid plate, the sliding seat plate is provided with a slotted hole at a front side portion for pivotal secure with the first support upper cross rod, allowing the first support upper cross rod to slide within the sliding seat plate, and the sliding seat plate is provided with a round hole at a rear end for pivotal secure with the second support upper cross rod.

5. The height-adjustable folding chair according to claim 1, wherein the first support comprises two parallel first support connecting rods and the first support upper cross rod, the first support connecting rods each comprise a first support first connecting rod and a first support second connecting rod, two ends of the first support upper cross rod are connected to upper ends of the two first support first connecting rods respectively, a lower section of the first support first connecting rod is movably inserted into an upper end of the first support second connecting rod, a pin hole is provided at a side portion of a lower end of the first support first connecting rod, two pin holes are provided at a side portion of an insertion-receiving section of the first support second connecting rod, and relative positions of the first support first connecting rod and the first support second connecting rod are secured by inserting a pin into the corresponding pin holes.

6. The height-adjustable folding chair according to claim 1, wherein the second support comprises two parallel second support connecting rods and the second support upper cross rod, the second support connecting rods each comprise a second support first connecting rod and a second support second connecting rod, two ends of the second support upper cross rod are connected to upper ends of the two second support first connecting rods respectively, a lower section of the second support first connecting rod is movably inserted into an upper end of the second support second connecting rod, a slotted hole is provided at a side portion of an inserted section of the second support first connecting rod, a pin hole is provided at a side portion of an upper end of the second support second connecting rod, and a pin passing through the slotted hole is provided in the pin hole.

7. The height-adjustable folding chair according to claim 1, wherein the second support comprises two second support connecting rods, two fixing sleeves, and one second support upper cross rod, the two second support connecting rods are disposed in parallel, the two fixing sleeves are fixed to two ends of the second support upper cross rod respectively, the two fixing sleeves are slidably sleeved on upper ends of the two second support connecting rods respectively, and a fixing point is provided at the upper end of each of the second support connecting rods to prevent the corresponding fixing sleeve from slipping, thereby ensuring the lowest position of the corresponding fixing sleeve.

8. The height-adjustable folding chair according to claim 1, further comprising a backrest support and a backrest fixing plate, wherein a lower end of the backrest support is pivotally secured with an upper section of the second support, a snap point is provided above a portion of the second support hinged to the backrest support, one end of the backrest fixing plate is pivotally secured with a lower section of the backrest support, and a snap opening fitting with the snap point is provided at the other end of the backrest fixing plate.

9. The height-adjustable folding chair according to claim 1, further comprising an armrest support and a backrest support, wherein a lower end of the armrest support is pivotally secured with an upper end of the first support, an upper end of the backrest support is pivotally secured with an upper end of the armrest support, a snap point is provided at an upper end of the second support, and a snap opening fitting with the snap point is provided at a lower end of the backrest support.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to illustrate the implementations of the present application or technical solutions in the prior art more clearly, the drawings required for describing the implementations or the prior art will be briefly introduced below. Apparently, the drawings described below are merely exemplary, and those of ordinary skill in the art may further derive other implementing drawings from the provided drawings without creative effort.

[0018] The structure, proportion, size, etc. illustrated in the description are used only for cooperating with the content disclosed in the description to facilitate understanding and reading by those skilled in the art, rather than limiting implementable specific conditions of the present application, and therefore do not have technically substantive meanings. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effect and purpose achievable by the present application, shall fall within the scope encompassed by the technical content disclosed in the present application.

[0019] FIG. 1 is a schematic structural diagram of a height-adjustable folding chair in a low-position state provided in Embodiment 1;

[0020] FIG. 2 is a schematic structural diagram of a height-adjustable folding chair in a high-position state provided in Embodiment 1;

[0021] FIG. 3 is a schematic structural diagram of a height-adjustable folding chair in a folded state provided in Embodiment 1;

[0022] FIG. 4 is an exploded view of a height-adjustable folding chair having a soft-body seat plate in a low-position state provided in Embodiment 1;

[0023] FIG. 5 is a schematic structural diagram of a height-adjustable folding chair having a hinge seat plate provided in Embodiment 1;

[0024] FIG. 6 is an exploded view of a height-adjustable folding chair having a hinge seat plate provided in Embodiment 1;

[0025] FIG. 7 is a schematic structural diagram of a height-adjustable folding chair having a sliding seat plate provided in Embodiment 1;

[0026] FIG. 8 is an exploded view of a height-adjustable folding chair having a sliding seat plate provided in Embodiment 1;

[0027] FIG. 9 is a schematic structural diagram of a height-adjustable folding chair in a low-position state provided in Embodiment 2;

[0028] FIG. 10 is an exploded view of a height-adjustable folding chair in a low-position state provided in Embodiment 2;

[0029] FIG. 11 is a schematic structural diagram of a height-adjustable folding chair in a low-position state provided in Embodiment 3;

[0030] FIG. 12 is an exploded view of a height-adjustable folding chair in a low-position state provided in Embodiment 3;

[0031] FIG. 13 is a schematic structural diagram of a height-adjustable folding chair in a low-position state provided in Embodiment 4;

[0032] FIG. 14 is an exploded view of a height-adjustable folding chair in a low-position state provided in Embodiment 4;

[0033] FIG. 15 is a schematic structural diagram of a height-adjustable folding chair having a backrest in a low-position state provided in Embodiment 5;

[0034] FIG. 16 is a schematic structural diagram of a height-adjustable folding chair having a backrest in a high-position state provided in Embodiment 5;

[0035] FIG. 17 is an exploded view of a height-adjustable folding chair having a backrest in a low-position state provided in Embodiment 5;

[0036] FIG. 18 is a schematic structural diagram of a height-adjustable folding chair having a backrest and an armrest in a low-position state provided in Embodiment 6;

[0037] FIG. 19 is a schematic structural diagram of a height-adjustable folding chair having a backrest and an armrest in a high-position state provided in Embodiment 6; and

[0038] FIG. 20 is an exploded view of a height-adjustable folding chair having a backrest and an armrest in a low-position state provided in Embodiment 6.

[0039] In the drawings: [0040] 1first support, 11first support upper cross rod, 12first support connecting rod, 121first support first connecting rod, 122first support second connecting rod; [0041] 2second support, 21second support upper cross rod, 22second support connecting rod, 221second support first connecting rod, 222second support second connecting rod, 23fixing sleeve, 24fixing point, 25snap point; [0042] 3seat plate, 31soft-body seat plate, 311tube, 312soft connecting body, 32hinge seat plate, 321front plate; 322rear plate, 33sliding seat plate, 34side A, 35side B; [0043] 4backrest support, 5backrest fixing plate, 6armrest support, 7slotted hole, 8pin hole, 9pin, 10snap opening.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The implementations of the present application are described below using specific embodiments, and those skilled in the art may readily understand other advantages and effects of the present application based on the content disclosed in the description. Apparently, the described embodiments are some rather than all of the embodiments of the present application. All the other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative effort fall within the scope of protection of the present application.

[0045] The terms such as upper, lower, left, right, and middle, etc. set forth in the description are merely for the convenience of clear description, and are not intended to limit the implementable scope of the present application. The change or adjustment of their relative relationship shall also fall within the implementable scope of the present application in the absence of substantial changes of the technical content.

Embodiment 1

[0046] As shown in FIGS. 1 to 4, Embodiment 1 provides a height-adjustable folding chair, including a first support 1, a second support 2, and a seat plate 3. The first support 1 and the second support 2 are each in a rectangle-like shape, the first support 1 is smaller and is nested in the second support 2, and middle sections of the two supports are connected to each other through a hinge shaft. The rectangle-like shape means that a lower section of the first support 1 and a lower section of the second support 2 each have a bending angle. For example, the first support 1 has a bending angle of 29, and the second support 2 has a bending angle of 35. Two ends of the seat plate 3 are pivotally secured with a first support upper cross rod 11 and a second support upper cross rod 21 respectively. When the first support 1 and the second support 2 are unfolded in an X shape, a bent section of the first support 1 and a bent section of the second support 2 are bent facing each other (also referred to as being bent inwards) or are bent facing away from each other (also referred to as being bent outwards).

[0047] As shown in FIG. 4, in an optional solution of this embodiment, the seat plate 3 is a soft-body seat plate 31 including two tubes 311 and a soft connecting body 312, wherein the two tubes 311 are pivotally secured to the first support upper cross rod 11 and the second support upper cross rod 21 respectively, and two ends of the soft connecting body 312 are connected to the two tubes 311 respectively. The soft connecting body 312 may be fabric or a rope net.

[0048] As shown in FIGS. 5 and 6, in another optional solution of this embodiment, the seat plate 3 is a hinge seat plate 32 including a front plate 321 and a rear plate 322 that are rigid, wherein a front end of the front plate 321 is pivotally secured with the first support upper cross rod 11, a rear end of the rear plate 322 is pivotally secured to the second support upper cross rod 21, a rear end of the front plate 321 and a front end of the rear plate 322 have square wave shapes engaging each other, and engaging portions are connected to each other through a transverse hinge shaft.

[0049] As shown in FIGS. 7 and 8, in still another optional solution of this embodiment, the seat plate 3 is a sliding seat plate 33 which is a rigid plate, the sliding seat plate 33 is provided with a slotted hole 7 at a front side portion for pivotal secure with the first support upper cross rod 11, allowing the first support upper cross rod to slide within the sliding seat plate, and the sliding seat plate 33 is provided with a round hole (not shown in the figures) at a rear end for pivotal secure with the second support upper cross rod 21.

[0050] In this embodiment, the seat plate 3 has a front side and a back side, which are a side A and a side B, respectively. When the two supports are unfolded in an X shape, the seat plate 3 is also unfolded and prevents the two supports from being excessively unfolded, the seat plate 3 serves as a seat to bear pressure from the hip, and the two supports serve as chair legs to support the seat. Since the lower sections of the two supports each have a bending angle, if the bent sections of the two supports in the unfolded state are bent facing away from each other, the chair legs formed by the supports are lower, and accordingly, the seat plate 3 is at a lower position, forming a low-position folding chair, in which case the side A of the seat plate 3 faces upwards; and if the bent sections of the two supports in the unfolded state are bent facing each other, the chair legs formed by the supports are higher, and accordingly, the seat plate 3 is at a higher position, forming a high-position folding chair, in which case the side B of the seat plate 3 faces upwards. Compared with existing height-adjustable folding chair, the height-adjustable folding chair achieves height adjustment and switch between the side A and the side B of the seat plate 3 just by arranging the supports at a bending angle, omitting a special adjustment structure, resulting in a simpler structure and reduced production costs.

Embodiment 2

[0051] This embodiment is a further improvement based on embodiment 1. As shown in FIGS. 9 and 10, in this embodiment, the first support 1 includes two parallel first support connecting rods 12 and the first support upper cross rod 11, wherein each of the first support connecting rods 12 includes a first support first connecting rod 121 and a first support second connecting rod 122, two ends of the first support upper cross rod 11 are connected to upper ends of the two first support first connecting rods 121 respectively, a lower section of the first support first connecting rod 121 is movably inserted into an upper end of the first support second connecting rod 122, a pin hole 8 is provided at a side portion of a lower end of the first support first connecting rod 121, two pin holes 8 are provided at a side portion of an insertion-receiving section of the first support second connecting rod 122, and relative positions of the first support first connecting rod 121 and the first support second connecting rod 122 are secured by inserting a pin 9 into the pin holes 8.

[0052] By pulling out the pin 9 and inserting the first support first connecting rod 121 into the first support second connecting rod 122 for a further distance, the height of the first support connecting rod 12 is reduced, so that the first support upper cross rod 11 can pass underneath the second support upper cross rod 21, to exchange positions of the two supports, thereby adjusting the heights of the supports and the seat plate 3, and completing the height adjustment of the folding chair. After the exchange, the position of the first support first connecting rod 121 is restored, and the pin 9 is inserted into the pin holes.

Embodiment 3

[0053] This embodiment is a further improvement based on embodiment 1. As shown in FIGS. 11 and 12, in this embodiment, the second support 2 includes two parallel second support connecting rods 22 and the second support upper cross rod 21, wherein each of the second support connecting rods 22 includes a second support first connecting rod 221 and a second support second connecting rod 222, two ends of the second support upper cross rod 21 are connected to upper ends of the two second support first connecting rods 221 respectively, a lower section of the second support first connecting rod 221 is movably inserted into an upper end of the second support second connecting rod 222, a slotted hole 7 is provided at a side portion of an inserted section of the second support first connecting rod 221, a pin hole 8 is provided at a side portion of an upper end of the second support second connecting rod 222, and a pin 9 passing through the slotted hole 7 is provided in the pin hole 8.

[0054] By pulling the second support first connecting rod 221 upwards, the second support upper cross rod 21 can cross over the first support upper cross rod 11, to exchange positions of the two supports, thereby adjusting the heights of the supports and the seat plate 3, and completing the height adjustment of the folding chair.

Embodiment 4

[0055] This embodiment is a further improvement based on embodiment 1. As shown in FIGS. 13 and 14, in this embodiment, the second support 2 includes two second support connecting rods 22, two fixing sleeves 23, and one second support upper cross rod 21, wherein the two second support connecting rods 22 are disposed in parallel, the two fixing sleeves 23 are fixed to two ends of the second support upper cross rod 21 respectively, the two fixing sleeves 23 are slidably sleeved on upper ends of the two second support connecting rods 22 respectively, and a fixing point 24 is provided at the upper end of each of the second support connecting rods 22 to prevent the corresponding fixing sleeve 23 from slipping, thereby ensuring the lowest position of the corresponding fixing sleeve 23.

[0056] Through the described design, the second support upper cross rod 21 may be lifted to a height to cause the second support upper cross rod 21 to be higher than the first support upper cross rod 11, ensuring that the first support upper cross rod 11 can pass underneath the second support upper cross rod 21, to exchange positions of the two supports, thereby adjusting the heights of the supports and the seat plate 3, and completing the height adjustment of the folding chair.

Embodiment 5

[0057] This embodiment is a further improvement based on embodiment 1. As shown in FIGS. 15 to 17, in this embodiment, the height-adjustable folding chair further includes a backrest support 4 and a backrest fixing plate 5, wherein a lower end of the backrest support 4 is pivotally secured with an upper section of the second support 2, a snap point 25 is provided above a portion of the second support 2 hinged to the backrest support 4, one end of the backrest fixing plate 5 is pivotally secured with a lower section of the backrest support 4, and a snap opening 10 fitting with the snap point 25 is provided at the other end of the backrest fixing plate 5.

[0058] The foldable backrest support 4 may be added to the folding chair of Embodiment 1 as a backrest of the chair, to improve comfortableness for a user.

Embodiment 6

[0059] This embodiment is a further improvement based on embodiment 1. As shown in FIGS. 18 to 20, in this embodiment, the height-adjustable folding chair further includes an armrest support 6 and a backrest support 4, wherein a lower end of the armrest support 6 is pivotally secured with an upper end of the first support 1, an upper end of the backrest support 4 is pivotally secured with an upper end of the armrest support 6, a snap point 25 is provided at an upper end of the second support 2, and a snap opening 10 fitting with the snap point 25 is provided at a lower end of the backrest support 4.

[0060] The foldable backrest support 4 may be added to the folding chair of Embodiment 1 as a backrest of the chair and the foldable armrest support 6 may be added as armrests, to improve comfortableness for a user.

[0061] In the described embodiments, the illustration is provided in a situation where the first support is smaller than the second support, and on the basis of the inventive concept of the present application, those skilled in the art may design the first support to be larger than the second support, which still falls into the scope of protection of the present application.

[0062] Although the present application has been described in details hereinabove using general description and specific embodiments, some modifications or improvements can be made based on the present application, which is apparent to those skilled in the art. Therefore, such modifications or improvements made without departing from the spirit of the present application fall within the scope of protection of the present application.