EXERCISE EQUIPMENT

Abstract

The present invention relates to exercise equipment, and more specifically, to exercise equipment that allows for the adjustment of weight resistance by controlling the elastic force applied to a wire. An exercise apparatus according to the present invention comprising a case having an internal space; an elastic module installed within the internal space and providing elastic force to a wire drawn out outside the case; and an adjustment module installed on one side of the elastic module to adjust the elastic force applied to the wire: wherein the elastic module comprises: a wire roller on which the wire is wound; a rotating shaft integrally rotating with the wire roller; a spring gear rotatably installed on the rotating shaft; and a spiral spring installed inside the spring gear to provide elastic force to the wire, wherein the spring gear comprises: a gear body open on one side to accommodate the spiral spring; a cover connected to the open side of the gear body, with radial protrusions formed on its inner surface in contact with the spiral spring; and a spring retainer securing the inner end of the spiral spring and fixed to the rotating shaft.

Claims

1. An exercise apparatus comprising a case having an internal space; an elastic module installed within the internal space and providing elastic force to a wire drawn out outside the case; and an adjustment module installed on one side of the elastic module to adjust the elastic force applied to the wire: wherein the elastic module comprises: a wire roller on which the wire is wound; a rotating shaft integrally rotating with the wire roller; a spring gear rotatably installed on the rotating shaft; and a spiral spring installed inside the spring gear to provide elastic force to the wire, wherein the spring gear comprises: a gear body open on one side to accommodate the spiral spring; a cover connected to the open side of the gear body, with radial protrusions formed on its inner surface in contact with the spiral spring; and a spring retainer securing the inner end of the spiral spring and fixed to the rotating shaft.

2. The exercise apparatus of claim 1, wherein the wire roller comprises: a shaft hole part which is inserted into the rotating shaft and fixedly mounted thereon to enable the rotation of the rotating shaft; a connecting bar radially extending from the shaft hole part; and a winding groove part formed in a ring shape at the outer end of the connecting bar, around which the wire is wound.

3. The exercise apparatus of claim 2, wherein the top and bottom of the shaft hole part are formed higher than the top and bottom of the connecting bar and the winding groove part.

4. The exercise apparatus of claim 3, wherein the connecting bar is formed lower than the top and bottom of the winding groove part.

5. The exercise apparatus of claim 4, wherein the spring retainer has a bending groove formed to secure the bent inner end of the spiral spring.

6. The exercise apparatus of claim 5, wherein the case includes a bottom surface in contact with the ground and an inclined surface formed to slope upward at a certain angle from the bottom surface.

7. The exercise apparatus of claim 6, wherein the angle of inclination of the inclined surface is between 10 and 20.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other features of the present invention will now be described in detail with reference to certain exemplary embodiments thereof illustrated the accompanying drawings which are given hereinbelow by way of illustration only, and thus are not limitative of the present invention, and wherein:

[0024] FIG. 1 is a top perspective view of the exercise equipment according to an embodiment of the present invention.

[0025] FIG. 2 is an exploded perspective view of the exercise equipment according to an embodiment of the present invention.

[0026] FIG. 3 is an exploded perspective view of the upper case of FIG. 1.

[0027] FIG. 4 is an exploded perspective view of the underside of the upper case of FIG. 1.

[0028] FIG. 5 is a perspective view showing the state with the upper case removed from FIG. 1.

[0029] FIG. 6 is an exploded perspective view of FIG. 5.

[0030] FIG. 7 is a side view showing the angle of the inclined surface of the exercise equipment in FIG. 1.

[0031] FIG. 8 is a perspective view of the elastic module and the adjustment module.

[0032] FIGS. 9 and 10 are exploded perspective views of the elastic module.

[0033] FIGS. 11 and 12 are exploded perspective views of the spring gear.

[0034] FIGS. 13 and 14 are perspective and side views of the wire roller.

[0035] FIGS. 15 and 16 are operational state diagrams of the adjustment module.

[0036] FIG. 17 is a plan view of the rotating member of the adjustment module.

[0037] FIG. 18 is a perspective view of another embodiment of the exercise equipment installed on a vertical support.

[0038] FIG. 19 is an enlarged rear perspective view of FIG. 18.

[0039] FIG. 20 is an exploded rear perspective view of FIG. 18.

[0040] It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various preferred features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment.

[0041] In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing.

DETAILED DESCRIPTION

[0042] The configuration and operation of an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

Embodiment

[0043] FIGS. 1 and 2 are perspective views of exercise equipment according to an embodiment of the present invention, and FIGS. 3 and 4 are exploded perspective views of the exercise equipment shown in FIGS. 1 and 2, respectively.

[0044] The exercise equipment (100) according to one embodiment of the present invention is designed for strength training. Wires (200) are drawn out from both sides of the upper of the case (300), and it is installed that an elastic module (600) to provide elastic force to the wires (200) and an adjustment module (700) to regulate the elastic force inside the case (300).

[0045] At the end of the wire (200) drawn outside the case (300), a gripping part (not shown) is provided, allowing the user to hold it with their hand, or pull it using parts of the body such as the arm or leg. After pulling the wire (200), if the force is released, the wire (200) is retracted back into the case (300) by the elastic force provided by the elastic module (600).

[0046] Thus, the user can perform strength exercises by repeatedly pulling and releasing the wires (200) using the gripping parts. For example, the user can stand on the upper surface of the case (300) and pull the wires (200) vertically with both hands. In another example, the case (300) can be fixed to a wall or a vertical support (10, see FIG. 18), allowing the user to pull the wires (200) horizontally for exercise.

[0047] The exercise equipment (100) according to one embodiment of the present invention comprises a case (300), wires (200) drawn out from the inside to the outside of the case (300), an elastic module (600) installed inside the case (300) to provide elastic force to the wires (200), and an adjustment module (700) positioned on one side of the elastic module (600) to regulate the elastic force applied to the wires (200).

[0048] The case (300) Includes a lower case (400) and an upper case (500), which are detachably connected in the vertical direction. In the illustrated case (300), the overall shape is an elongated oval, with a slightly protruding section in the middle of one long side. However, this is merely one embodiment of the invention, and the overall external shape of the case (300) can be appropriately selected as needed.

[0049] The lower case (400) has a structure like open-top box, forming an internal space to install the elastic module (600) and the adjustment module (700). The upper case (500) is detachably coupled to the top of the lower case (400).

[0050] FIGS. 3 and 4 are exploded perspective views of the upper case.

[0051] As shown in FIGS. 3 and 4, the upper case (500) includes an upper frame (510) that is attached to the top of the lower case (400) and an upper plate (520) that is fitted onto the upper frame (510). The upper surface of the upper frame (510) features a low step along its perimeter, allowing the upper plate (520) to be inserted and attached to the upper frame (510).

[0052] A first through-hole (511) is formed on one side of the central portion of the upper frame (510). Through this first through-hole (511) and a second through-hole (521) in the upper plate (520), which will be described later, the upper end of the module housing (410, see FIG. 5) projects above the case (300). Multiple circular reinforcing ribs (519) are formed on both sides of the first through-hole (511) to support the user's weight when standing on the upper case (500). These reinforcing ribs (519) interlock with the reinforcing ribs (403) of the lower case to ensure the case remains securely in place.

[0053] Additionally, a pair of outlet units (513) protrude from both longitudinal sides of the upper frame (510). The top surface of each outlet unit (513) may be shaped as a concave curve, with an outlet hole (514) formed on center to allow the wire (200) to be drawn out. Guide rollers (515) are rotatably installed beneath the outlet units (513) to guide the wire (200) as it exits through the outlet hole (514) to the outside of the case (300). The upper frame (510) also includes mounting holes (512) to secure the mount housing (517) of the mounting unit (516).

[0054] Moreover, a pair of mounting units (516) are provided on the underside of the upper frame (510), one on each side of the first through-hole (511). These mounts (516) are intended for coupling the support with the case (300) when mounting the exercise equipment (100) on a separate support. The mounting unit (516) includes a mount housing (517) attached to the underside of the upper frame (510), a coupling lever (518) that is protruded downward from the mount housing (517) and is connected to the support, and an elastic member (not shown) installed within the mount housing (517) to elastically support the coupling lever (518).

[0055] The coupling lever (518) can be retracted inside the case (300). And when the coupling lever (518) is rotated as needed, the elastic member causes the coupling lever (518) to be protruded through the sixth through-hole (450, see FIG. 7) of the lower case (400) and connected to a support structure.

[0056] The upper plate (520) is coupled to the upper surface of the upper frame (510). A second through-hole (521) is formed on one side of the central portion of the upper plate (520) to communicate with the first through-hole (511) of the upper frame (510). Third through-holes (522) are formed on both longitudinal sides of the upper plate (520) corresponding to the outlet units (513) of the upper frame (510). When the upper frame (510) and the upper plate (520) are assembled, the outlet holes (514) are exposed through the third through-holes (522), allowing the wire (200) to be drawn out outside.

[0057] FIG. 5 is a perspective view showing the state with the upper case removed from FIG. 1, and FIG. 6 is an exploded perspective view of FIG. 5.

[0058] As shown in FIGS. 5 and 6, the elastic module (600) and the adjustment module (700) are installed inside the module housing (410). When the upper case (500) and the lower case (400) are assembled, the upper end of the module housing (410) protrudes through the first through-hole (511) and the second through-hole (521) above the upper case (500).

[0059] The module housing (410) includes a lower inner housing (420) attached to one side of the bottom surface of the lower case (400), an upper inner housing (440) covering the top of the lower inner housing (420), and an outer housing (430). The outer housing (430) is configured such that its lower part is coupled around the circumference of the first through-hole (511) of the upper frame (510), and its upper part protrudes above the upper frame (510) through the first through-hole (511). When the upper case (500) and lower case (400) are assembled, the outer housing (430) encloses and protects the upper inner housing (440) and the lower inner housings (420). The outer housing (430) also has a fifth through-hole (433) to accommodate the installation of a cover (432), an adjustment knob (840), and a shaft part (810). Additionally, a fourth through-hole (431) is formed on the upper surface of the outer housing (430) to vertically install the shaft part (810) of the rotation member (800) which will be described later. The fourth through-hole (431) is connected to the fifth through-hole (432).

[0060] FIG. 7 is a side view of the exercise equipment (100). As shown in FIG. 7, the lower case (400) includes a bottom surface (401) that contacts the ground and an inclined surface (402) forming a specific angle () with the bottom surface (401). The inclined surface (402) is designed to help the user maintain balance and adopt the correct posture during exercise, ensuring proper technique. The angle () between the inclined surface (402) and the ground is between 10 and 20, preferably around 16.

[0061] FIG. 8 is a perspective view of the elastic module and the adjustment module, with one elastic module (600) removed from one of the receiving parts (421) for clarity in explanation.

[0062] As shown in FIG. 8, the elastic module (600) and the adjustment module (700) are installed in the lower inner housing (420). Specifically, a pair of receiving parts (421) are formed inside the lower inner housing (420), spaced apart at a predetermined distance, and each receiving part (421) houses an elastic module (600). That is, two elastic modules (600) are installed inside the lower inner housing (420) at a set distance apart, with the adjustment module (700) positioned between them.

[0063] On both sides of the lower end of the lower inner housing (420), guide holes (422) are formed to communicate with the receiving parts (421) for the wires (200) to be drawn out. One end of the wire (200) which is wound around the elastic module (600), is drawn out through the guide hole (422) to the outside of the inner housing (420) and further extends outside the case (300) through the guide roller (515) and outlet hole (514).

[0064] FIGS. 9 and 10 are exploded perspective views of the elastic module.

[0065] The elastic module (600) provides elastic force to the wire (200) and includes a wire roller (610) on which the wire (200) is wound, a rotating shaft (620) integrally rotating with the wire roller (610), a spring gear (630) rotatably installed on the rotating shaft (620), and a spiral spring (660) that provides elastic force to the wire (200).

[0066] As seen in FIGS. 9 and 10, the wire roller (610) and multiple spring gears (630) are stacked vertically in the receiving part (421) of the lower inner housing (420). The rotating shaft (620) is installed vertically through the center of the wire roller (610) and the spring gears (630). The wire roller (610) is coupled to rotate integrally with the rotating shaft (620), while the spring gears (630) are freely rotatable relative to the rotating shaft (620).

[0067] The spring gear (630) includes a body (640) with a cavity (641) formed inside and multiple gear teeth (642) protruding along its outer circumference, and a cover (650) attached to the top of the body (640) to cover the cavity (641). A spiral spring (660), also known as a main spring, is installed in the cavity (641) inside the body (640).

[0068] The spiral spring (660) is connected at one end to a spring retainer (670), which is fixedly coupled to the rotating shaft (620). The other end of the spiral spring is attached to the inner surface of the body (640) of the spring gear (630). Consequently, when the wire roller (610) rotates due to the withdrawal of the wire (200), the rotating shaft (620), which is integrally coupled with the wire roller (610), also rotates. As the rotating shaft (620) rotates, the spiral spring (660), which is connected at one end to the rotating shaft (620), undergoes elastic deformation and transmits rotational force to the spring gear (630).

[0069] If the rotation of the spring gear (630) is forcibly restrained, the rotational force of the rotating shaft (620) accumulates in the spiral spring (660), increasing its elastic force. This results in an increase in the elastic force exerted on the wire (200). Therefore, when the force pulling the wire (200) is removed, the elastic force of the spiral spring (660) causes the wire roller (610) to rotate in the opposite direction along with the rotating shaft (620), thereby winding the wire (200) onto the wire roller (610).

[0070] To achieve this, at least one locking protrusion (423, see FIG. 8) is formed along the inner circumferential surface of the receiving part (421). These protrusions engage with at least one of the multiple spring gears (630) to restrict their rotation. For instance, as shown in FIG. 8, multiple locking protrusions (423) can be formed protruding along the lower inner circumferential surface of the receiving part (421) to restrict the rotation of the lowermost spring gear (630) among the multiple spring gears (630).

[0071] In this way, the spring gear (630), whose rotation is restricted by the locking protrusion (423), provides the basic rotational force required to wind the wire (200) onto the wire roller (610) due to the elastic deformation of the spiral spring (660). Consequently, when the user pulls the wire (200), elastic force is applied to the wire (200).

[0072] As shown in FIG. 11, the upper spring gears (631, 632, 633, 634) consist of a gear body (640) that is open on one-side to accommodate the spiral spring (660), a cover (650a) connected to the open side of the gear body with radial protrusions (651a) formed on its inner surface that contacts the spiral spring (660), and a spring retainer (670) that secures the inner end of the spiral spring (660) and is fixed to the rotating shaft (620). Since the spiral spring (660) is inserted into the spring gear (630), it comes into contact with the top or bottom of the spring gear (630), generating friction. To minimize this friction, radial protrusions (651a) are formed on the bottom surface of the cover (650a). Additionally, coupling holes (652a) are provided on the cover (650a) to facilitate its connection to the gear body (640). The spring retainer (670) has a bending groove (671) where the inner end of the spiral spring (660) is engaged, and for ease of use, a pair of bending grooves (671) may be formed on both sides. The spring gears (630) installed on both rotating shafts (620) are mounted in opposite orientations. That is, one side has the cover (650) positioned on the upper side, while the other side has the cover (650) on the lower side. Therefore, to facilitate the installation of the spiral spring (660), a pair of bending grooves (671) can be formed on both sides.

[0073] FIG. 12 shows the lower spring gear (635). As illustrated, the lower spring gear (635) consists of a gear body (640) open on one side to accommodate the spiral spring (660), a cover (650b) connected to the open side of the gear body with radial protrusions (651b) formed on its inner surface in contact with the spiral spring (660), and a spring retainer (670) that secures the inner end of the spiral spring (660) and is fixed to the rotating shaft (620). Similar to the upper spring gear, radial protrusions (651b) are formed on the bottom surface of the lower cover (650b) to minimize friction with the spiral spring (660). The lower cover (650b) also includes coupling holes (652b) for connecting to the gear body (640). The spring retainer (670) has a bending groove (671) where the inner end of the spiral spring (660) is engaged, and, for ease of use, a pair of bending grooves (671) can be formed on both sides. The spring gears (630) installed on both rotating shafts (620) are mounted in opposite orientations. That is, one side has the cover (650) positioned on the upper side, while the other side has the cover (650) on the lower side. Therefore, to facilitate the installation of the spiral spring (660), a pair of bending grooves (671) can be formed on both sides.

[0074] FIGS. 13 and 14 illustrate the wire roller (610). The wire roller (610) comprises a shaft hole part (613) that secures the position of the rotating shaft (620) to enable its rotation, a connecting bar (612) extending radially from the shaft hole part (613), and a winding groove part (611) formed in a ring shape at the outer end of the connecting bar (612) where the wire (200) is wound. As shown in FIG. 14, the shaft hole part (613) of the wire roller (610) is designed to protrude slightly more than the surface of the winding groove part (611). This prevents friction between the wire roller (610) and the spring gear (630) during use, ensuring smooth rotation of the wire roller (610).

[0075] In this invention, the adjustment module (700) serves to control the rotational force applied to the rotating shaft (620) by the elastic force of the spiral spring (660), and consequently, the elastic force applied to the wire (200).

[0076] In conventional strength training equipment, weight adjustments are typically made by adding or removing weight blocks. In the exercise equipment (100) according to this invention, the spiral spring (660) fulfills the role of the weight block. That is, the weight required for strength training can be adjusted by increasing or decreasing the number of spiral springs (660) (or the number of spring gears (630) whose rotation is restricted) that provide elastic force to the wire (200).

[0077] Referring to FIG. 2, the adjustment module (700) includes a rotating member (800) installed on one side of the elastic module (600) and a hook member (900) elastically supported toward the rotating member (800). By the forward and backward movement of the hook member (900) due to the rotation of the rotating member (800), the spring gear (630) is locked/unlocked, thereby adjusting the elastic force applied to the wire (200).

[0078] As shown in the figures, the rotating member (800) can be vertically installed between a pair of elastic modules (600). Referring to FIG. 8, the rotating member (800) consists of a shaft part (810) rotatably mounted, a plurality of engaging parts (820) with an expanded width spaced at predetermined intervals along the height direction of the shaft part (810), and an adjustment knob (840) formed at the top of the shaft part (810) and exposed to the upper part of the module housing (410). The engaging parts (820) face the multiple spring gears (630) and the hook members (900) described later. The outer circumferential surface of the engaging part (820) has an engaging groove (830) to accommodate the insertion part (920) of the hook member (900) described later.

[0079] The hook member (900) is installed on one side of the inner housing (420). Multiple hook members (900) can be installed to face the multiple spring gears (630) and engaging parts (820).

[0080] As an example, a mounting part (424) for attaching the hook member (900) can be formed on one side of the inner housing (420), and multiple slide space parts (425, see FIG. 2) can be defined vertically within this mounting part (424). Each slide space part (425) allows the hook member (900) to be inserted and able to be sliding, being elastically supported toward the direction of the rotating member (800) and the spring gear (630) by an elastic body (940) such as a coil spring. Additionally, to prevent the hook member (900) from detaching, a backplate (426) is attached to the rear of the mounting part (424). Multiple guide grooves (427, see FIG. 8) are formed through the center and both sides of the front of the mounting part (424) to allow the insertion part (920) and the locking protrusion (930) of the hook member (900) to protrude into the inner side of the receiving part (421).

[0081] The hook member (900) includes a plate-shaped slide body (910, see FIG. 15), an insertion part (920) protruding from the front end of the slide body (910), locking protrusions (930) extending from both front ends of the slide body (910) toward the spring gear (630), and an elastic body (940), such as a coil spring, that elastically supports the slide body (910).

[0082] In the slide space part (425), the hook member (900) is positioned with its insertion part (920) facing the engaging part (820) of the rotating member (800), and the locking protrusions (930) facing the spring gear (630). When the hook member (900) slides, the locking protrusion (930) engages with the teeth (642) of the spring gear (630), restricting its rotation. Consequently, as the rotating shaft (620) rotates due to the wire (200) being pulled out, the spiral spring (660) inside the spring gear (630) accumulates elastic force.

[0083] Thus, the user can adjust the elastic force applied to the wire (200) by increasing or decreasing the number of spring gears (630) whose rotation is restricted by the hook members (900). In other words, as the number of spring gears (630) restricted by the hook members (900) increases, the number of spiral springs (660) that undergo elastic deformation due to the rotation of the wire roller (610) and the rotating shaft (620) also increases. This results in a greater elastic force being applied to the wire (200) via the rotating shaft (620) from the spiral springs (660), achieving a similar effect to increasing the weight by adding weight blocks.

[0084] FIGS. 15 and 16 illustrate the operating state of the adjustment module.

[0085] The user can adjust the elastic force applied to the wire (200) by rotating the rotating member (800). For instance, as shown in FIG. 15, if all the hook members (900) are spaced apart from the spring gears (630), only the spiral spring (660) of the spring gear (630) whose rotation is restricted by the locking protrusion (423) (e.g., the lowermost spring gear (630)) provides elastic force to the wire (200).

[0086] As shown in FIG. 16, when the rotating member (800) is rotated in one direction, the hook member (900) advances toward the rotating member (800) due to the elastic force of the elastic body (940), causing the insertion part (920) of the hook member (900) to be inserted into the engaging groove (830) of the engaging part (820).

[0087] At this time, the locking protrusion (930) of the hook member (900) engages with the teeth (642) of the spring gear (630), thereby restricting the rotation of the spring gear (630). This increases the number of spiral springs (660) providing elastic force to the wire (200). In other words, in addition to the spiral spring (660) of the spring gear (630) whose rotation is restricted by the locking protrusion (423) (e.g., the lowermost spring gear (630)), the spiral spring (660) of the spring gear (630) whose rotation is restricted by the hook member (900) (e.g., the uppermost spring gear (630)) also applies elastic force to the wire (200).

[0088] Multiple spring gears (630) are stacked along the rotating shaft (620) in the receiving part (421) of the lower inner housing (420). From the topmost spring gear, they are referred to sequentially as a first spring gear (631, see FIG. 9), a second spring gear (632), a third spring gear (633), a fourth spring gear (634), and a fifth spring gear (635). The lowermost spring gear (630), whose rotation is restricted by the locking protrusion (423), corresponds to the fifth spring gear (635), and the wire roller (610) can be interposed between the fourth spring gear (634) and the fifth spring gear (635).

[0089] Additionally, from the topmost hook member, the multiple hook members (900) can be distinguished as a first hook member (901, see FIG. 2), a second hook member (902), a third hook member (903), and a fourth hook member (904). The first hook member to the fourth hook member (901904) are positioned opposite the first spring gear to the fourth spring gear (631634), respectively. As the rotating member (800) turns, it sequentially restricts the rotation of the first spring gear to the fourth spring gear (631634), thereby increasing the elastic force applied to the wire (200). This process will be explained in detail with reference to FIG. 17.

[0090] FIG. 17 is a plan view of the rotating member of the adjustment module.

[0091] As shown in FIG. 17, an engaging groove (830) is formed in each of multiple engaging parts (820). The uppermost engaging part (820) on the rotating member (800) is referred to as a first engaging part (821), and the ones below it are sequentially referred to as a second, third, and fourth engaging parts (822, 823, 824).

[0092] The first engaging part (821) has a total of four engaging grooves (830) spaced 45apart, the second engaging part (822) has three engaging grooves (830) spaced 45 apart, the third engaging part (823) has two engaging grooves (830) spaced 45 apart, and the fourth engaging part (824) has one engaging groove (830). The angular spacing between adjacent pairs of engaging grooves (830) can be selected as needed.

[0093] The second engaging groove (830) of the first engaging part (821) is aligned vertically with the first engaging groove (830) of the second engaging part (822). Similarly, the third engaging groove (830) of the first engaging part (821) is vertically aligned with the second engaging groove (830) of the second engaging part (822) and the first engaging groove (830) of the third engaging part (823). Furthermore, the fourth engaging groove (830) of the first engaging part (821) is vertically aligned with the third engaging groove (830) of the second engaging part (822), the second engaging groove (830) of the third engaging part (823), and the engaging groove (830) of the fourth engaging part (824).

[0094] In other words, referring to the plan view in FIG. 17, the engaging groove (830) of the first engaging part (821) is positioned at point A, approximately 45 counterclockwise from the contact point (O) of the insertion part (920) of the hook member (900). At point B, approximately 90 counterclockwise from the contact point (O), the engaging grooves (830) of both the first and second engaging part (821, 822) overlap. At point C, approximately 135 counterclockwise from the contact point (O), the engaging grooves (830) of the first, second, and third engaging parts (821, 822, 823) overlap. At point D, approximately 180 counterclockwise from the contact point (O), the engaging grooves (830) of the first, second, third, and fourth engaging parts (821, 822, 823, 824) overlap.

[0095] The user can grasp the adjustment knob (840) and rotate the rotating member (800) as needed. When the rotating member (800) is rotated approximately 45 clockwise, as shown in FIG. 13, the first hook member (901) advances toward the rotating member (800) due to the elastic force of the elastic body (940). The insertion part (920) of the first hook member (901) is inserted into the engaging groove (830) of the first engaging part (821) (point A). At this point, the second to fourth hook members (902904) remain stationary, and the locking protrusion (930) of the first hook member (901) engages with the first spring gear (631), restricting its rotation.

[0096] If the rotating member (800) is rotated an additional 45 clockwise, the insertion parts (920) of the first and second hook members (901, 902) are inserted into the engaging grooves (830) of the first and second engaging parts (821, 822) (point B). At this point, the third and fourth hook members (903904) remain stationary, and the locking protrusions (930) of the first and second hook members (901, 902) engage with the first and second spring gears (631, 632), restricting their rotation.

[0097] Subsequently, if the rotating member (800) is rotated another 45 clockwise, the insertion parts (920) of the first to third hook members (901903) are inserted into the engaging grooves (830) of the first to third engaging part (821823) (point C). At this point, the fourth hook member (904) remains stationary, and the locking protrusions (930) of the first to third hook members (901903) engage with the first to third spring gear (631633), restricting their rotation.

[0098] Finally, if the rotating member (800) is rotated an additional 45 clockwise, the insertion parts (920) of the first to fourth hook member (901904) are inserted into the engaging grooves (830) of the first to fourth engaging part (821824) (point D). At this point, the locking protrusions (930) of the first to fourth hook member (901904) engage with the first to fourth spring gear (631634), restricting their rotation.

[0099] In other words, each time the rotating member (800) is rotated approximately 45 clockwise in the drawing, the number of spring gears (630) whose rotation is restricted by the hook members (900) increases. Consequently, the number of spiral springs (660) providing elastic force to the wire (200) through the rotating shaft (620) also increases, thereby increasing the elastic force, or the weight, applied to the wire (200).

[0100] In one embodiment of the exercise equipment (100) according to the present invention, the user can place the case (300) on the floor, stand on it, and perform strength exercises by pulling the wires (200) on both sides.

[0101] In another embodiment, the exercise equipment (100) can be installed vertically against a wall or a separate vertical support (10). FIG. 18 shows an example where the exercise equipment is installed on a separate vertical support. FIG. 19 is a rear perspective view of the exercise equipment (100) installed on the vertical support (10). As shown in the Figure, the exercise equipment (100) can be connected to the vertical support (10) through a mounting unit (20).

[0102] The mounting unit (20) consists of a front coupling (27) formed to engage with a coupling lever (518) protruding from the bottom surface of the lower case (400), a hook coupling (26) mounted on the rear of the front coupling (27) to secure the coupling lever (518), an intermediate coupling (24) attached to the rear of the front coupling (27), a locking coupling (23) connected to the lower part of the intermediate coupling (24), a rear coupling (22) attached to the rear of the locking coupling (23), and a support guide fixture (21) installed on the rear of the rear coupling (22) to guide and secure the position to the vertical support (10). The locking coupling (23) further includes a lever (25) for inserting a locking bar (251) into a hole (11) formed in the vertical support (10). The locking bar (251) can be elastically locked and unlocked by a spring (252).

[0103] While the embodiments of the present invention have been described above, it is understood that various modifications can be made without departing from the scope of the claims of the present invention by those skilled in the art.