Muscle support device and muscle support method

Abstract

A muscle-strengthening device and a muscle-strengthening device and a muscle-strengthening device are described below. The disclosed device comprises a first device worn on part of the user's body, a second device worn on other parts of the user's body, and a constant load generating unit provided on the first device having a constant load spring device that applies a constant load to the second device. The method is such that the first device worn on part of the user's body applies a constant load to the second device worn on other parts of the user's body, while the constant load generating unit provided on the first device applies a constant load to the user in accordance with changes in the relative distance between the first device and the second device or changes in the body's external shape in accordance with the user's body movements.

Description

Technical Field

[0001] The present disclosure relates to a muscle strength assisting device and a method thereof, and more particularly, to a device and a method for assisting the erector spinae muscles of the upper body.

Background Art

[0002] Various operations that utilize muscle strength require various forms of physical load on the operator. If any form exceeds the limit of the operator's muscle strength, it may cause physical damage to the operator.

[0003] Wearable assistive suits for assisting physical muscle strength generate an assisting force that helps to perform tasks that are difficult to execute with ordinary muscle strength.

[0004] Passive suits have a structure that simply supports body movements, while active suits have a structure that generates an amplified artificial force that supports and amplifies body movements. Active suits are not only structurally complex but also expensive. [[ID=二十二]]

[0005] On the other hand, in the case of existing passive wearable assistive suits, the structure is complex, making it difficult to avoid interference with surrounding structures, modifying the supporting force according to the operation being performed, and maintaining the assisting force constant.

[0006] Therefore, it would be beneficial to develop a muscle strength assisting device that is easy to wear, minimizes interference with surrounding environmental elements in the worn state, and can keep the determined assisting force constant.

Summary of the Invention

Problems to be Solved by the Invention

[0007] The present disclosure provides a muscle strength assisting device and a muscle strength assisting method that are easy to wear and can minimize interference with external environmental elements.

[0008] This disclosure provides a muscle-strengthening device and method that allow for multi-stage adjustment of the assist force and maintain a constant level of the determined assist force.

[0009] This disclosure provides a muscle-strengthening device and a muscle-strengthening method that assist the movement of upper body muscles with an assisting force in order to protect against excessive tension of upper body muscles, including the erector spinae muscles, and excessive arching of the spine. [Means for solving the problem]

[0010] A muscle-assisting device according to one or more embodiments of the present disclosure comprises a first device worn on a part of the user's body, a second device worn on another part of the user's body, and a constant-load generating unit provided on the first device and having a constant-load spring device that applies a constant load to the second device.

[0011] According to one or more embodiments, the constant load generating unit may include a plurality of constant load spring devices for applying a constant load in multiple stages.

[0012] Each spring end of the constant-load spring device may be provided with a coupling head that is selectively coupled to the second device.

[0013] According to one or more embodiments, the constant-load spring device may comprise a central spring device and two outer spring devices positioned on either side of the central spring device.

[0014] According to one or more embodiments, the two couple ring heads provided at the spring ends of the two outer spring devices may be connected to each other by a bridge.

[0015] According to one or more embodiments, the bridge may have a channel through which the coupling head of the central spring is placed or passes.

[0016] According to one or more embodiments, the channel may have a seating portion formed therein, to which the coupling head of the central spring is fixed.

[0017] According to one or more embodiments, the first device is provided with a head mounting portion having a coupling bracket to which the coupling head is releasably fixed and which provides a coupling space into which the head is inserted relative to the frame of the first device, and the coupling bracket may be provided with a locking device for pinning the coupling heads provided on each of the springs with operating pins.

[0018] According to one or more embodiments, the locking device may be a plunger-type locking device comprising a cylindrical body fixed to the coupling bracket, an operating pin that reciprocates relative to the cylindrical body, and a handle connected to the operating pin.

[0019] According to one or more embodiments, the first device may be attached to the user's waist, and the second device may be attached to the upper body.

[0020] The muscle support method according to this disclosure involves a first device worn on a part of the user's body which applies a constant load to a second device worn on another part of the user's body, while a constant load generating unit provided in the first device applies a constant load to the user in accordance with changes in the relative distance between the first device and the second device or changes in the external shape of the user's body, corresponding to the movement of the user's body.

[0021] According to one or more embodiments of the method, the constant load generating unit generates the constant load in multiple stages by a plurality of springs drawn from a plurality of constant load spring devices, and the plurality of springs may transmit the constant load to the second device via a head mounting portion provided on the second device.

[0022] According to one or more embodiments, the constant load generating unit may apply a constant load that is adjusted in multiple stages by a plurality of constant load spring devices for applying a multi-stage constant load to the user's body via the second device.

[0023] According to one or more embodiments, the constant load spring device may generate the constant load by at least any one selected from a central spring device and at least one of two outer spring devices arranged on both sides of the central spring device.

[0024] According to the method of one or more embodiments, the first device may apply the constant load to the upper body of the user, and the second device may fix a constant load generating unit that generates the constant load at the waist of the user.

Brief Description of the Drawings

[0025] [Figure 1] It is a schematic perspective view of a muscle strength assisting device according to an embodiment. [Figure 2] It is a schematic perspective view of the muscle strength assisting device according to the embodiment shown in FIG. 1 as seen from the back. [Figure 3] Illustrates a detailed configuration of a constant load generating unit applied to a muscle strength assisting device according to an embodiment. [Figure 4] It is a perspective view showing an extract of the constant load generating unit of the muscle strength assisting device shown in FIG. 3. [Figure 5] Illustrates a structure in which a coupling head of a spring according to another embodiment is provided independently. [Figure 6] It is a schematic partial cross-sectional view of a state in which a coupling head is coupled to a head mounting portion according to an embodiment. [Figure 7] Illustrates a short screw type index plunger that can be used as a locking device for a coupling head in one embodiment. [Figure 8] Illustrates a muscle strength assisting device to which a locking device according to another embodiment is applied. [Figure 9] It is an extract perspective view showing in more detail an enlarged portion of the locking device shown in FIG. 8. [Figure 10] In the embodiments shown in Figures 8 and 9, a coupling head fixed to the head mounting portion in the coupling space between the frame and the coupling bracket is illustrated. [Figure 11] The relationship between the operating pin of a locking device according to another embodiment and the elastic piece that elastically biases it is shown. [Figure 12] The following is an example of a state in which the muscle-assist device related to this disclosure, as described above, is worn. [Modes for carrying out the invention]

[0026] Preferred embodiments of the concept of the present invention will be described in detail below with reference to the accompanying drawings. However, embodiments of the concept of the present invention can be modified into various different forms, and the scope of the concept of the present invention should not be construed as being limited by the embodiments described below. It is preferable that embodiments of the concept of the present invention be construed as being provided to more fully explain the concept of the present invention to a person of average skill in the art. The same reference numerals all mean the same element. Furthermore, various elements and areas in the drawings are depicted schematically. Therefore, the concept of the present invention is not limited by the relative sizes and spacings depicted in the accompanying drawings.

[0027] Terms such as "first," "second," etc., may be used to describe various components, but the components are not limited by such terms. The terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the concept of the present invention, the first component may be referred to as the second component, and conversely, the second component may be referred to as the first component.

[0028] The terms used in this application are used solely to describe specific embodiments and are not intended to limit the concepts of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, expressions such as “includes” or “has” specify the existence of features, numbers, stages, operations, components, parts, or combinations thereof as described in the specification, and should be understood not to preemptively exclude the existence or possibility of the addition of one or more other features, numbers, operations, components, parts, or combinations thereof.

[0029] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as those commonly understood by those ordinary in the art to which the concepts of the present invention pertain. Furthermore, commonly used, dictionary-defined terms should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an overly formal sense unless expressly defined herein.

[0030] Where several embodiments are otherwise embodied, the order of certain steps may differ from the order described. For example, two steps described consecutively may be performed substantially simultaneously, or in the reverse order of the described order.

[0031] The following describes a muscle-strengthening assist device according to one or more embodiments.

[0032] This is a schematic perspective view of a muscle-strengthening assist device according to one embodiment.

[0033] Referring to Figure 1, the muscle assist device 100 according to this disclosure includes a first device 110 worn on a part of the user's body, such as the waist, in the form of a suit worn on the body; a second device 120 worn on the upper body of the user; and a constant load generating unit 130 that connects the first device 110 and the second device 120, is fixed to the first device 110 and applies a constant load to the second device 120. In the embodiments described below, it is assumed that the constant load generating unit 130 is equipped with three constant load spring devices 131 (Figure 3), and the description will be based on this assumption. However, in other embodiments, the number of constant load spring devices can be increased or decreased depending on the design.

[0034] The first device 110 has the shape of a belt worn around the waist and comprises a belt 111 that is wrapped around the user's waist and a buckle 112 that secures the belt 111, which is tightened to fit the waist, so that it does not loosen. Thus, the first device having the shape shown in Figure 1 may be modified and transformed into various shapes, and the technical scope of this disclosure is not limited by these specific shapes.

[0035] The second device 120 comprises an upper frame 121 that is worn on the user's upper body and has two branched parts 121a and 121b that come into contact with the back, and a shoulder strap 122 for securing it to the user's upper body.

[0036] The second apparatus 120 is shown schematically and, like the first apparatus 110, may be modified and transformed into various shapes, without limiting the technical scope of this disclosure.

[0037] The constant load generating unit 130 is capable of multi-stage load adjustment and is equipped with multiple constant load springs, which will be described later.

[0038] Such a constant load generating unit 130 includes a coupling head 131c that extends from multiple constant load springs and is capable of moving a constant stroke.

[0039] The second device 120 is provided with a head mounting portion 140 to which the coupling head 131c is releasably fixed.

[0040] Figure 2 is a schematic perspective view of the muscle-strengthening device 100 of the embodiment shown in Figure 1, viewed from the rear.

[0041] Referring to Figure 2, the back side of the muscle assist device 100 according to this disclosure is provided with a constant load generating section 130 and a head mounting section 140.

[0042] The constant load generating unit 130 is provided on the rear side of the belt 111 in the first device 110, and the head mounting unit 140 is provided on the frame 121 of the second device 120.

[0043] The first device 110 has the shape of a buckle-type belt worn around the waist and comprises a belt 111 that is wrapped around the user's waist and a buckle 112 that secures the belt 111, which is tightened to fit the waist, so that it does not loosen from the waist. Thus, the first device 110 having the shape shown in Figure 1 may be deformed and modified into various shapes, and the technical scope of this disclosure is not limited by these specific shapes.

[0044] The second device 120 is a portion worn on the user's upper body and includes an upper frame 121 that contacts the back. In one embodiment, this upper frame 121 has a V-shape with a first branch 121a and a second branch 121b that branch into two, and the shoulder straps 122 described above are connected to each branch. In Figures 1 and 2, the second device 120 is shown schematically and, like the first device 110, may be modified and transformed into various shapes, which does not limit the technical scope of this disclosure.

[0045] As described above, the constant load generating unit 130 is equipped with multiple constant load spring devices to enable multi-stage load adjustment, or in this embodiment, two-stage load adjustment. As described above, the constant load generating unit 130 is equipped with a coupling head 131c that can move a certain stroke from the multiple constant load spring devices 131 (Figure 3).

[0046] The second device 120 is provided with a head mounting portion 140 to which the coupling head 131c is releasably fixed.

[0047] The coupling bracket 141 of the head mounting portion 140 is provided with a number of locking devices 142, each containing a reciprocating operating pin 142a that fixes the coupling head 131c inserted inside the coupling space 141c between the coupling bracket 141 and the frame 121, corresponding to the number of constant-force springs described later.

[0048] The constant-load spring device generates a stroke in which the internal spring extends or retracts when the user bends their waist or flexes or straightens their upper body, generating a constant load. In particular, it assists the user's muscle strength when extending, and also applies a constant load in the direction of retraction when straightening the upper body, such as when lifting an object, thus assisting the user's movement in addition to the user's actual muscle strength.

[0049] Figure 3 illustrates the detailed structure of the constant load generating unit 130. Figure 3 shows the spring protection cover 135 and the coupling bracket 141 removed, schematically illustrating a structure in which three constant load spring devices 131 are arranged side by side in the left-right direction according to an exemplary embodiment. Here, for the sake of understanding the structure, both outer springs 131b are shown extended and pulled out from the constant load spring device 131, while the central spring 131b of the three is shown retracted to its maximum extent and remains closest to the constant load generating unit 130.

[0050] As shown in Figure 3, the constant load generating unit 130 has a structure in which three constant load spring devices 131 are arranged side by side in the left-right direction. Such a load generating unit 130 includes a shaft 132 that rotatably supports the drum 131a of the constant load spring device 131 around which the springs 131b are wound, a support bracket 133 that supports it, a spring protection cover 135 (Figures 1 and 2), and a stopper plate 134 on which the coupling head 131c at the tip of each spring 131b of the constant load spring device 131 is placed while limiting the retraction distance of each spring 131b of the constant load spring device 131. The stopper plate 134 has slits 134a formed in it, one for each spring 131b through which the springs 131b pass.

[0051] In Figure 3, the two coupling heads 131c, located at the ends of the two outer springs 131b, are connected as a single unit by a bridge 131d to form a single common coupling head structure. The intermediate region of the bridge 131d is designed to allow the central spring 131b to move independently. To this end, a channel 131e with a low bottom is formed in the intermediate region of the bridge 131d, through which the central spring 131b and its coupling head 131c pass or are placed.

[0052] Figure 4 is an excerpted perspective view of the constant load generating section 130. As shown in Figure 4, three springs 131b are connected on a housing consisting of a support bracket 133, its upper and lower stopper plates 134, and a spring protection cover 135. The two outer springs 131b are connected to each of the two outer coupling heads 131c connected by a bridge 131d, and these central springs 131b have an independent coupling head 131c. In another embodiment, a channel 131e having a low bottom in the intermediate region of the bridge 131d provides a bottom-shaped seating portion similar to the central coupling head 131c, and at the bottom of this seating portion is an auxiliary pinhole 131f opposite to the pinhole 131h of the central coupling head 131c. The auxiliary pinhole 131f is the portion into which the end of the central operating pin 142a fits, ensuring a more secure fixation of the central coupling head 131c.

[0053] Figure 4, for convenience, shows the two outer springs pulled upward and the central spring 131b in a free position. In the embodiment shown in Figure 4, it is possible to apply a constant load in three stages, including a step of using the two outer springs, a step of using only the central spring, or a step of using both the two outer springs and the central spring.

[0054] Figure 5 illustrates a structure in this embodiment in which the coupling heads 131c of the three springs 131b are provided independently, as is the case in all other embodiments. This structure may be individually coupled to the head mounting portion 140, and therefore, one spring device, two spring devices, or all three spring devices may be connected to the second device 120 as needed, thereby providing a constant load in three stages.

[0055] Figure 6 is a schematic partial cross-sectional view showing the state in which the coupling head 131c is connected to the head mounting portion 140.

[0056] The coupling head 131c is inserted inside the coupling bracket 141, that is, into the coupling space 140c between the coupling bracket 141 and the frame 121, and is secured by the operating pin 142a of the locking device 142, which is inserted into its own pinhole 131h.

[0057] The fixed cylindrical body 142c of the locking device 142 has a threaded portion and is fixed to the coupling bracket 141, and the operating pin 142a is provided to reciprocate relative to the cylindrical body 142c of the locking device 142. The state in which the cylindrical body 142c is screwed onto the coupling bracket 141 is made secure by a locking nut 142d. The handle 142b is integrally connected to the outer end of the operating pin 142a.

[0058] In another embodiment, the actuation pin 142a may be elastically biased in the direction of the pinhole 131h, and therefore, a structure for such elastic biasing may be provided in the locking device 142. Thus, when the coupling head 131c is inserted into the coupling space 140c, the actuation pin 142a is retracted by pulling the handle 142b backward, and then the actuation pin 142a is released after the coupling head 131c has fully entered, and the coupling head 131c is locked to the head mounting portion 140 while the actuation pin 142a is inserted into the pinhole 131c' by the elastic biasing force.

[0059] Figure 6 is shown in a simplified form to facilitate understanding of the basic structure of the locking device 142.

[0060] Figure 7 illustrates a sample of a short screw-type index plunger that can be used as a locking device 142 for the coupling head 131c in the present invention.

[0061] Referring to Figure 7, the index plunger used as the locking device (142) in this embodiment comprises an operating pin 142a inserted into the pinhole 131c', a cylindrical body 142c having a threaded portion that screws onto the coupling bracket 141, a locking nut 142d that securely fastens the cylindrical body 142c of the locking device 142 to the coupling bracket 141, and a handle 142b integrally coupled with the operating pin 142a.

[0062] Figure 8 illustrates a muscle-strengthening assist device 100 to which a locking device 142 according to another embodiment is applied.

[0063] Referring to Figure 8, the muscle assist device 100 according to this disclosure comprises a first device 110 worn on a part of the user's body, for example, the waist; a second device 120 worn on the upper body of the user; and a constant load generating unit 130 that connects the first device 110 and the second device 120, is fixed to the first device 110, and applies a constant load to the second device 120.

[0064] The first device 110 has the shape of a belt worn around the waist and includes a belt 111 that is wrapped around the user's waist and a buckle 112 that secures the belt 111, which is tightened to fit the waist, so that it does not loosen. The second device 120 is a part worn on the user's upper body and includes a frame 121 having two branched parts 121a and 121b that come into contact with the back, and a shoulder strap 122 for securing it to the user's upper body.

[0065] The constant load generating unit 130 allows for multi-stage load adjustment and includes a coupling head 131c that extends from multiple constant load springs and is capable of constant stroke movement.

[0066] The second device 120 is provided with a head mounting portion 140 to which the coupling head 131c is releasably fixed.

[0067] The coupling bracket 141 of the head mounting portion 140 is provided with a locking device 142 according to another embodiment.

[0068] The locking device 142 includes a reciprocating operating pin 142a that fixes the coupling head 131c, inserted inside the coupling bracket 141, i.e., in the coupling space 140c between the coupling bracket 141 and the upper frame 121; an elastic piece 143 that elastically biases the operating pin 142a; and a fixing bolt 144 that fixes the elastic piece to the coupling bracket 141.

[0069] Figure 9 is an excerpted perspective view showing a more detailed, enlarged view of the locking device 142, with the coupling bracket 141 to which the locking device 142 is fixed shown by a dotted line, and the coupling heads 131c and 131d inside it.

[0070] Figure 10 shows the coupling space 140c between the upper frame 121 and the coupling bracket 141, with the operating pin 142a of the locking device 142 inserted into the pin holes 131c' and 131d' of the coupling heads 131c and 131d, and the coupling head 13 fixed to the head mounting portion 140.

[0071] Figure 11 shows the relationship between the operating pin 142a, the elastic piece 143 that elastically biases it, and the coupling heads 131c and 131d into which the operating pin 142a is fitted.

[0072] As shown in Figure 11, the operating pin 142e, which fits into the pinhole 131h of the coupling heads 131c and 131d, is fixed to one side of one end of the elastic piece 143, and a screw hole is formed at the other end of the elastic piece into which a fixing bolt 144 fits.

[0073] Here, the tip of the operating pin 142e is provided with an inclined cross-section, which is so that when the coupling heads 131c and 131d are fitted into the coupling space 140c, the tips of the coupling heads 131c and 131d will ride up.

[0074] The operating pin 142a, which is inserted into the pinhole 131h by the elastic piece 143 as described above, can be released by pulling the elastic piece 143 backward, and therefore the coupling head 131c can be separated from the head mounting portion 140 at this time.

[0075] Figure 12 illustrates a state in which the muscle-strengthening device 100 described above is worn.

[0076] The muscle support device 100 shown in Figure 12 is equipped with a plunger-shaped locking device 142 to which the operating pin 142a is applied. The same constant-load muscle support is also provided when the aforementioned elastic spring locking device 142 is applied.

[0077] As shown in Figure 12, the first device is worn around the waist, and the second device is secured to the upper body by shoulder straps 122 that are worn on the shoulders and connected at the back of the upper body.

[0078] In this state, when user 1 bends their upper body, the spring 131b is stretched as their back bends. At this time, the spring 131b of the constant load generating unit 130, which is attached to the head mounting unit 140, applies a constant load to user 1's upper body. When user 1 straightens their upper body again, the spring 131b retracts under the constant load, providing a constant load to the upper body that is applied to the user's muscle strength as they straighten their upper body.

[0079] As described above, the constant load is determined by the number of springs 131b used, thereby allowing for multi-stage adjustment of the constant load according to the user's selection.

[0080] A muscle-assisting method according to the present disclosure, based on the aforementioned apparatus, wherein a first device worn on a part of the user's body applies a constant load to a second device worn on another part of the user's body, and a constant load generating unit provided in the first device applies a constant load to the user in accordance with changes in the relative distance between the first device and the second device or changes in the external shape of the user's body in accordance with the user's body movements.

[0081] Here, the constant load generating unit generates the constant load in multiple stages by multiple springs drawn from multiple constant load spring devices, and the multiple springs can transmit the constant load to the second device via a head mounting portion provided on the second device.

[0082] According to one or more embodiments, the constant load generating unit can apply a constant load load to the user's body via the second device, which is adjusted in multiple stages by a plurality of constant load spring devices for multi-stage constant load application.

[0083] According to one or more embodiments, the constant load spring device can generate the constant load by a central spring device and at least one of two outer spring devices positioned on either side of the central spring device.

[0084] According to one or more embodiments of the method, the first device can apply the constant load to the user's upper body, and the second device can fix a constant load generating unit that generates the constant load at the user's waist.

[0085] According to this disclosure, in assisting the user's muscle strength, the system provides assistance with a constant load, preventing inconvenience or accidents to the user caused by sudden changes in load. In particular, by generating muscle assistance force in multiple stages and adjusting the load according to the user's needs, it can be used in a wide range of applications.

[0086] Although various embodiments of the present invention have been described in detail above, any person with ordinary skill in the art to which the present invention pertains can modify and implement the present invention in various ways without departing from the spirit and scope of the invention as defined in the appended claims. Therefore, any further modifications to the embodiments of the present invention will not deviate from the art of the present invention.

Claims

1. A first device worn on a part of the user's body, A second device worn on another part of the user's body, The first device is provided with a constant load generating unit that applies a constant load to the second device and has a plurality of constant load spring devices having springs connected to the second device, A muscle-strengthening device characterized in that each of the spring ends of the plurality of constant-load spring devices is provided with a coupling head that is connected to a second device.

2. The constant load generating unit applies a multi-stage constant load to the second device. The muscle assist device according to claim 1, characterized in that each spring end of the plurality of constant-load spring devices is selectively coupled to the second device.

3. The muscle assist device according to claim 1, wherein the plurality of constant-load spring devices comprises a central spring device and two outer spring devices arranged on both sides of the central spring device.

4. The muscle support device according to claim 3, wherein two couple ring heads provided at the spring ends of each of the two outer spring devices are connected to each other by a bridge.

5. The muscle support device according to claim 4, wherein the bridge has a channel formed in which the coupling head of the central spring is placed or passes through.

6. The muscle support device according to claim 5, wherein a seating portion is formed in the channel to which the coupling head of the central spring is fixed.

7. The first device is provided with a head mounting portion having a coupling bracket that provides a coupling space into which the head is inserted relative to the frame of the first device, and to which the coupling head is releasably fixed. The muscle support device according to claim 1, wherein the coupling bracket is provided with a locking device that pins the coupling heads provided on each of the springs with an operating pin.

8. The muscle assist device according to claim 7, wherein the locking device is a plunger-type locking device comprising a cylindrical body fixed to the coupling bracket, an operating pin that reciprocates relative to the cylindrical body, and a handle connected to the operating pin.

9. The muscle assist device according to claim 7, wherein the locking device is a plunger-type locking device comprising an elastic piece that elastically biases a reciprocating operating pin and fixes the coupling head in a releaseable manner by pin fixing.

10. The muscle support device according to claim 9, wherein the first device is attached to the user's waist and the second device is attached to the upper body.

11. A muscle-strengthening assistance method that uses a muscle-strengthening device to assist the user's muscle strength, The aforementioned muscle-strengthening device is A first device worn on a part of the user's body, A second device worn on another part of the user's body, The first device is provided with a constant load generating unit that applies a constant load to the second device and has a plurality of constant load spring devices having springs connected to the second device, Each of the spring ends of the aforementioned plurality of constant-load spring devices is provided with a coupling head that is connected to the second device. The aforementioned muscle support method is The first device, worn on a part of the user's body, applies a constant load to the second device, which is worn on another part of the user's body. A muscle-strengthening assistance method using a muscle-strengthening assistance device, wherein a constant load generating unit provided in the first device applies a constant load load to the user using the plurality of constant load spring devices in response to changes in the relative distance between the first device and the second device or changes in the external shape of the user's body, in accordance with the user's body movements.

12. Each spring end of the constant-load spring device is selectively coupled to the second device, and the constant-load generating unit generates the constant load in multiple stages by the multiple springs drawn from the multiple constant-load spring devices. The muscle support method according to claim 11, wherein the plurality of springs transmit the constant load to the second device via a head mounting portion provided on the second device.

13. The muscle support method according to claim 12, wherein the constant load generating unit applies a constant load load, which is adjusted in multiple stages by the plurality of constant load spring devices for applying a constant load in multiple stages, to the user's body via the second device.

14. The muscle support method according to claim 11, wherein the constant load generating unit applies a constant load load, which is adjusted in multiple stages by the plurality of constant load spring devices for applying a constant load in multiple stages, to the user's body via the second device.

15. A muscle-strengthening method using a muscle-strengthening device according to claim 14, wherein the constant load spring device generates the constant load by a central spring device and at least one selected from two outer spring devices arranged on both sides of the central spring device.

16. The first device applies the constant load to the user's upper body. The muscle support method according to claim 15, wherein the second device fixes the constant load generating unit that generates the constant load load at the user's waist.

17. A muscle-strengthening method using a muscle-strengthening device according to claim 11, wherein the constant load spring device generates the constant load by a central spring device and at least one selected from two outer spring devices arranged on both sides of the central spring device.

18. A muscle-strengthening method using a muscle-strengthening device according to claim 12, wherein the constant load spring device generates the constant load by a central spring device and at least one selected from two outer spring devices arranged on both sides of the central spring device.

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