Apparatus and method for assisting muscular strength

Abstract

An apparatus and a method for assisting muscular strength are described. The disclosed apparatus comprises: a first device to be worn on a part of the body of a user; a second device to be worn on another part of the body of the user; and a static load generation part provided in the first device so as to have a static load spring device that applies a static load to the second device. In the method, the first device, which is worn on a part of the body of the user, applies a static load to the second device worn on the other part of the body of the user, and the static load generation part, which is provided in the first device, applies a static load to the user in response to a change in the relative distance between the first device and the second device according to the movement of body of the user or a change in the body shape.

Description

Muscle assist devices and methods

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

[0002] Various tasks that utilize strength require workers to exert varying degrees of physical stress. Any form of physical stress that exceeds a worker's strength limits can result in physical injury.

[0003] Wearable assistive suits that assist physical strength generate assistive power to help perform tasks that are difficult to perform with normal muscle strength.

[0004] Passive suits are structured to simply support physical movement, while active suits generate amplified artificial forces to support the body's movements. Active suits are not only structurally complex, but also expensive.

[0005] Meanwhile, existing passive wearable assistive suits also have complex structures, making it difficult to avoid interference with surrounding structures, and it is also difficult to modify the support force according to the task being performed and maintain the support force at a constant level.

[0006] Therefore, it would be beneficial to develop a muscle assist device that is easy to wear, minimizes interference with surrounding environmental factors while worn, and has a constant determined assistive force.

[0007] The present disclosure provides a muscle assist device and method that is easy to wear and can minimize interference with external environmental factors.

[0008] The present disclosure provides a muscle assistance device and method capable of multi-stage adjustment of assist force and maintaining a determined assist force at a constant level.

[0009] The present disclosure provides a muscle assistance device and method that assists the movement of upper body muscles by auxiliary force to protect the upper body muscles including the erector spinae muscles from excessive tension and excessive bending of the spine.

[0010] A muscle assist device according to one or more embodiments of the present disclosure;

[0011] A first device worn on a part of the user's body;

[0012] a second device worn on another part of the user's body; and

[0013] A static load generating unit having a static load spring device installed on the first device and applying a static load to the second device is provided.

[0014] According to one or more embodiments,

[0015] The above static load generating unit may be equipped with multiple static load spring devices for applying multi-stage static loads, and

[0016] Each spring end of the above static load spring devices may be provided with a coupling head that is optionally coupled to the second device.

[0017] According to one or more embodiments,

[0018] The above static load spring device may have a central spring device and two peripheral spring devices arranged on either side of the central spring device.

[0019] According to one or more embodiments,

[0020] Two coupling heads provided at the spring ends of each of the above two outer spring devices can be interconnected by a bridge.

[0021] According to one or more embodiments,

[0022] A channel may be formed in the above bridge through which the coupling head of the central spring is placed or passes.

[0023] According to one or more embodiments,

[0024] A seating portion can be formed in the above channel to which the coupling head of the central spring is fixed.

[0025] According to one or more embodiments,

[0026] 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 with respect to the frame of the first device, such that the coupling head is releasably fixed thereto, and

[0027] The above coupling bracket may be provided with a locking device that fixes the coupling head provided on each of the above springs by an operating pin.

[0028] According to one or more embodiments,

[0029] The above locking device may be a plunger-type locking device having a cylindrical body fixed to the coupling bracket, an operating pin reciprocating with respect to the cylindrical body, and a handle connected to the operating pin.

[0030] According to one or more embodiments,

[0031] The first device may be mounted on the user's waist, and the second device may be mounted on the user's upper body.

[0032] The muscle strength assistance method according to the present disclosure is:

[0033] A first device worn on a part of the user's body applies a static load to a second device worn on another part of the user's body,

[0034] A static load generating unit installed in the first device applies a static load to the user in response to a change in the relative distance between the first device and the second device or a change in the body shape according to the user's body movement.

[0035] According to one or more of the embodiments,

[0036] The above static load generating unit generates the static load in multiple stages by a plurality of springs drawn from a plurality of static load spring devices,

[0037] The above plurality of springs can transmit the static load to the second device through a head mounting portion provided in the second device.

[0038] According to one or more embodiments,

[0039] The above static load generating unit can apply a static load that is controlled in multiple stages by a plurality of static load spring devices for applying a multi-stage static load to the user's body through the second device.

[0040] According to one or more embodiments, the static load spring device can generate the static load by at least one selected from a central spring device and two peripheral spring devices disposed on either side of the central spring device.

[0041] According to one or more of the embodiments,

[0042] The above first device applies the static load to the upper body of the user,

[0043] The second device can fix a static load generating unit that generates the static load at the user's waist.

[0044] FIG. 1 is a schematic perspective view of a muscle assist device according to one embodiment.

[0045] FIG. 2 is a schematic perspective view of the muscle assist device of the embodiment illustrated in FIG. 1 as viewed from the rear.

[0046] Figure 3 illustrates a detailed structure of a static load generating unit applied to a muscle assist device according to one embodiment.

[0047] Fig. 4 is a perspective view showing an excerpt of the static load generating part of the muscle assist device illustrated in Fig. 3.

[0048] Fig. 5 illustrates a structure in which the coupling head of the spring is provided independently according to another embodiment.

[0049] FIG. 6 is a schematic partial cross-sectional view of a coupling head coupled to a head mounting portion according to one embodiment.

[0050] FIG. 7 is an exemplary photograph of a short threaded index plunger that may be used as a locking device for a coupling head in one embodiment.

[0051] FIG. 8 illustrates a muscle assist device applying a locking device according to another embodiment.

[0052] Figure 9 is an excerpt perspective view showing a portion of the locking device illustrated in Figure 8 in greater detail.

[0053] FIG. 10 illustrates a coupling head fixed to a head mounting portion in a coupling space between a frame and a coupling bracket in the embodiment illustrated in FIGS. 8 and 9.

[0054] Fig. 11 illustrates the relationship between the operating pin of the locking device and the elastic piece that elastically biases it according to another embodiment. And,

[0055] Figure 12 illustrates a state of wearing the muscle assist device according to the present disclosure as described above.

[0056] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention may be modified in various different forms, and the scope of the present invention should not be construed as being limited by the embodiments described below. It is preferable to interpret that the embodiments of the present invention are provided to more completely explain the present invention to a person having average knowledge in the art. Like numbers refer to like elements throughout. Furthermore, various elements and areas in the drawings are schematically drawn. Therefore, the present invention is not limited by the relative sizes or intervals drawn in the accompanying drawings.

[0057] While terms such as "first" and "second" may be used to describe various components, these components are not limited by these terms. These terms are used solely to distinguish one component from another. For example, a first component could be referred to as a second component, and vice versa, without departing from the scope of the present invention.

[0058] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the concept of the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the expressions “comprises” or “has” are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, operations, components, parts, or combinations thereof.

[0059] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Furthermore, it is to be understood that commonly used terms, such as those defined in dictionaries, should be interpreted to have a meaning consistent with their meaning within the relevant technical context, and should not be interpreted in an overly formal sense unless explicitly defined herein.

[0060] In some embodiments, where the implementation is otherwise feasible, a particular process sequence may be performed in a different order than described. For example, two processes described in succession may be performed substantially simultaneously, or in a reverse order from the described order.

[0061] Hereinafter, a muscle assist device according to one or more embodiments is described.

[0062] FIG. 1 is a schematic perspective view of a muscle assist device according to one embodiment.

[0063] Referring to FIG. 1, a muscle assist device (100) according to the present disclosure is provided with a first device (110) worn on one side of a user's body, for example, the waist, in the form of a body-worn suit, a second device (120) worn on the upper body of the user's body, and a constant load generating unit (130) that connects the first device (110) and the second device (120) and is fixed to the first device (110) to apply a constant load to the second device (120). In the following described embodiment, the constant load generating unit (130) is illustrated on the premise that three constant load spring devices (131, FIG. 3) are provided, and the description will be made based on this; however, according to another embodiment, the number of constant load spring devices may be increased or decreased depending on the design.

[0064] The first device (110) has the form of a belt worn around the waist, and is provided with a belt (111) that is wrapped around the user's waist and a buckle (112) that secures the belt (111) tightened to fit the waist so that it does not come loose. As such, the first device of the form illustrated in FIG. 1 can be modified and adapted in various ways, and the technical scope of the present disclosure is not limited by these specific forms.

[0065] The second device (120) is a part worn on the user's upper body and has a frame (121) having two branches (121a, 121b) that are attached to the back plate and a shoulder strap (122) for fixing the frame to the user's upper body.

[0066] The above second device (120) is schematically illustrated and, like the first device (110), can be modified and altered in various forms, and this also does not limit the technical scope of the present disclosure.

[0067] The above constant load generating unit (130) is capable of multi-stage load adjustment and is equipped with a plurality of constant load springs, which will be described in detail later.

[0068] This static load generating unit (130) is provided with a coupling head (131c) that extends from a plurality of static load springs and is capable of movement of a certain stroke.

[0069] The second device (120) is provided with a head mounting portion (140) in which the coupling head (131c) is releasable and fixed.

[0070] FIG. 2 is a schematic perspective view of the muscle assist device (100) of the embodiment illustrated in FIG. 1 as viewed from the rear.

[0071] Referring to FIG. 2, a static load generating unit (130) and a head mounting unit (140) are provided at the rear of the muscle assist device (100) according to the present disclosure.

[0072] The above static load generating unit (130) is installed on the rear side of the belt (111) in the first device (110), and the head mounting unit (140) is installed on the frame (121) of the second device (120).

[0073] The first device (110) is in the form of a buckle-type belt worn on the waist, and includes a belt (111) that is wrapped around the user's waist and a buckle (112) that secures the belt (111) tightened to fit the waist so that it does not come loose from the waist. In this way, the first device (110) of the form illustrated in FIG. 1 can be modified and adapted in various ways, and the technical scope of the present disclosure is not limited by these specific forms.

[0074] The second device (120) is a part worn on the user's upper body and has an upper frame (121) that is attached to the back plate. According to one embodiment, the upper frame (121) has a V-shaped shape with a first branch (121a) and a second branch (121b), and a shoulder strap (122) as described above is connected to each branch. In FIGS. 1 and 2, the second device (120) is schematically illustrated, and like the first device (110), it can be modified and adapted in various forms, which also does not limit the technical scope of the present disclosure.

[0075] As described above, the static load generating unit (130) is provided with a plurality of static load spring devices to enable multi-stage load control, and in this embodiment, two-stage load control. As described above, the static load generating unit (130) is provided with a coupling head (131c) that is capable of movement of a certain stroke from a plurality of static load spring devices (131, FIG. 3).

[0076] The second device (120) is provided with a head mounting portion (140) in which the coupling head (131c) is releasable and fixed.

[0077] The coupling bracket (141) of the head mounting portion (140) is provided with a locking device (142) having a reciprocating operating pin (142a) that secures the coupling head (131c) inserted into the coupling space between the coupling bracket (141) and the frame (121) inside the coupling bracket (141), i.e., the coupling bracket (141) and the frame (121), in a number corresponding to the number of static load springs described below.

[0078] The above-mentioned constant load spring generates a stroke in which the spring extends or retracts when the user bends the waist or bends or straightens the upper body, and at this time generates a constant load, which assists the user's muscle strength, especially when extending, and also assists the user's movement in addition to the user's actual muscle strength by applying a constant load in the direction in which the spring retracts, for example, when straightening the upper body, such as lifting an object.

[0079] Fig. 3 illustrates a detailed structure of the static load generating unit (130). Fig. 3 schematically illustrates a structure in which three static load spring devices (131) are arranged in a left-right direction in parallel, according to an exemplary embodiment, with the aforementioned spring protection cover (135) and coupling bracket (141) removed. Here, in order to help understand the structure, the springs (131b) on both sides on the outside are extended (withdrawn) from the static load spring device (131), and the spring (131b) in the middle is retracted as much as possible to stay closest to the static load generating unit (130).

[0080] As illustrated in Fig. 3, the static load generating unit (130) has a structure in which three static load spring devices (131) are arranged in a parallel left-right direction. The static load generating unit (130) includes a shaft (132) that rotatably supports a drum (131a) of a static load spring device (131) in which a spring (131b) is wound, a support bracket (133) that supports the drum, a spring protection cover (135, Figs. 1 and 2), and a stop plate (134) that limits the retreat distance of each spring (131b) of the static load spring device (131) while causing the coupling head (131c) at the tip thereof to be caught in a no-load state. In the stop plate (134), slits (134a) through which the springs (131b) pass are formed as many as the number of spring devices (131).

[0081] In Fig. 3, the two coupling heads (131c) provided at the ends of the springs (131b) on both sides are connected as one by a bridge (131g) to form a single common coupling head structure, and the middle part of the bridge (131d) is designed so that the spring (131b) in the middle can move independently. To this end, a low-bottomed channel (131e) is formed in the middle part of the bridge (131d) through which the central spring (131b) and its coupling head (131c) pass or are placed.

[0082] Fig. 4 is a perspective view of the static load generating unit (130). As shown in Fig. 4, three springs (131b) are connected above the housing by the support bracket (133) and the upper and lower stop plates (134) and the spring protection cover (135), and the two outer springs (131b) are connected to each of the outer coupling heads (131c) connected by the bridge (131d), and the spring (131b) in the middle of these has an independent coupling head (131c). Here, according to another embodiment, a low-bottomed channel (131e) in the center of the bridge (131d) provides a seating part having a similar bottom shape to the central coupling head (131c), and an auxiliary pinhole (131f) facing the pinhole (131h) of the central coupling head (131c) is provided on the bottom of this seating part. The above auxiliary pinhole (131f) is the part where the end of the central operating pin (142a) enters, and ensures more secure fixation of the central coupling head (131c).

[0083] In Fig. 4, the two outer springs are shown in a state where they are pulled upward, and the spring in the middle is freely positioned for convenience. In the embodiment of Fig. 4, a three-stage static load can be applied: a stage using the two outer springs, a stage using only one middle spring, or a stage using both the two outer springs and the middle spring.

[0084] FIG. 5 illustrates a structure in which all, in this embodiment, three, coupling heads (131c) of springs (131b) are independently provided according to another embodiment. This structure allows them to be individually coupled to the head mounting portion (140), and thus, as needed, one spring device, two spring devices, or all three spring devices can be connected to the second device (120), thereby providing a three-stage static load.

[0085] Figure 6 is a schematic partial cross-sectional view of a state in which a coupling head (131c) is coupled to the head mounting portion (140).

[0086] The coupling head (131c) is inserted into the inside of the coupling bracket (141), i.e., into the coupling space (140c) between the coupling bracket (141) and the frame (121), and is fixed by the operating pin (142a) of the locking device (142) which is inserted into its own pin hole (131h).

[0087] The fixed cylindrical body (142c) of the above locking device (142) has a screw portion and is fixed to the coupling bracket (141), and the operating pin (142a) is installed so as to be able to reciprocate with respect to the cylindrical body (142c) of the locking device (142). The state in which the cylindrical body (142c) is screw-connected to the coupling bracket (141) is firmly fixed by a locking nut (142d). In addition, a handle (142b) is integrally connected to the outer end of the operating pin (142a).

[0088] According to another embodiment, the actuating pin (142a) may be elastically biased in the direction of the pin hole (131h), and thus a structure for such elastic bias may be provided in the locking device (142). Accordingly, when the coupling head (131c) is inserted into the coupling space (140c), the handle (142b) is pulled back to retract the actuating pin (142a), and after the coupling head (131c) is fully inserted, the actuating pin (142a) is released, and the actuating pin (142a) is engaged in the pin hole (131c') by the elastic bias force, thereby locking the coupling head (131c) to the head mounting portion (140).

[0089] In Fig. 6, the basic structure of the locking device (142) is illustrated in a simplified manner to help understand it.

[0090] FIG. 7 is an exemplary photograph of a short screw-type index plunger that can be used as a locking device (142) for a coupling head (131c) in the present invention.

[0091] Referring to FIG. 7, the index plunger used as a locking device (142) in the present embodiment has an operating pin (142a) that is inserted into the pin hole (131c'), a cylindrical body (142c) having a screw portion that is screw-connected to the coupling bracket (141), a locking nut (142d) that firmly secures the state in which the cylindrical body (142c) of the locking device (142) is screw-connected to the coupling bracket (141), and a handle (142b) that is integrally connected to the operating pin (142a).

[0092] FIG. 8 illustrates a muscle assist device (100) applying a locking device (142) according to another embodiment.

[0093] Referring to FIG. 8, a muscle assist device (100) according to the present disclosure comprises a first device (110) worn on one side of the user's body, for example, the waist, a second device (120) worn on the upper body of the user's body, and a constant load generating unit (130) that connects the first device (110) and the second device (120) and is fixed to the first device (110) to apply a constant load to the second device (120).

[0094] The first device (110) has the form of a belt worn on the waist, and is provided with a belt (111) that is wrapped around the user's waist and a buckle (112) that secures the belt (111) tightened to fit the waist so that it does not come loose. The second device (120) is a part that is worn on the user's upper body and is provided with a frame (121) having two branches (121a, 121b) that are attached to the back panel, and a shoulder strap (122) for securing the frame to the user's upper body.

[0095] The above static load generating unit (130) is also capable of multi-stage load control and is equipped with a coupling head (131c) that extends from a plurality of static load springs and is capable of movement of a certain stroke.

[0096] The second device (120) is provided with a head mounting portion (140) in which the coupling head (131c) is releasable and fixed.

[0097] A locking device (142) according to another embodiment is installed in the coupling bracket (141) of the above head mounting portion (140).

[0098] The locking device (142) is provided with a reciprocating operating pin (142a) that secures the coupling head (131c) inserted into the coupling space (140c) between the coupling bracket (141) and the frame (121), an elastic piece (143) that elastically biases the coupling head, and a fixing bolt (144) that secures the coupling head (131c) to the coupling bracket (141).

[0099] Fig. 9 is an excerpt perspective view showing the locking device (142) in greater detail, in which the coupling bracket (141) to which the locking device (142) is fixed is indicated by a dotted line so that the coupling head (131c, 131d) inside it can be seen.

[0100] FIG. 10 shows a state in which the operating pin (142a) of the locking device (142) is inserted into the pin hole (131c', 131d') of the coupling head (131c, 131d) in the coupling space (140c) between the frame (121) and the coupling bracket (141), so that the coupling head (131c, 131d) is fixed to the head mounting portion (140).

[0101] Figure 11 shows the relationship between the operating pin (142 a), the elastic piece (143) that elastically biases it, and the coupling head (131c, 131d) into which the operating pin (142 a) is fitted.

[0102] As shown in Fig. 11, an operating pin (142e) fitted into a pin hole (131h) of a coupling head (131 c, 131 d) is fixed to one side of one end of an elastic piece (143), and a screw hole into which a fixing bolt (144) is fitted is formed on the other end of the elastic piece.

[0103] Here, the tip of the operating pin (142e) is provided with an inclined cross-section so that the tip of the coupling head (131c, 131d) can rise when the coupling head (131c, 131d) is inserted into the coupling space (140c).

[0104] The operating pin (142a) inserted into the pin hole (131h) by the elastic piece (143) as above is released by pushing the elastic piece (143) backward, and thus, at this time, the coupling head (131c) can be separated from the head mounting part (140).

[0105] Fig. 12 illustrates a state of wearing a muscle assist device (100) according to the present disclosure as described above.

[0106] The muscle assist device (100) illustrated in Fig. 12 is applied with a plunger-type locking device (142) that applies an operating pin (142a), and even when the locking device (142) by the elastic spring described above is applied, the same static load muscle assist occurs.

[0107] As shown in Fig. 12, the first device is worn on the waist, and the second device is fixed to the upper body by a shoulder strap (122) worn on the shoulder attached to the upper body back plate.

[0108] In this state, when the user (1) bends the upper body, the back bends and the spring (131b) is pulled and extended. At this time, the spring (131b) of the static load generating unit (130) attached to the head mounting unit (140) provides a load to the upper body of the user (1) as a static load, and when the upper body is raised again, the spring (131b) retreats as a static load and provides a static load to the upper body that is added to the muscle strength of the user raising the upper body.

[0109] As described above, the static load is determined by the number of springs (131b) used, and thus, multi-stage adjustment of the static load is possible according to the user's choice.

[0110] A muscle assistance method according to the present disclosure based on the above-described device is such that a first device worn on a part of a user's body applies a static load to a second device worn on another part of the user's body, and a static load generating unit installed on the first device applies the static load to the user in response to a change in the relative distance between the first device and the second device or a change in the body shape according to a movement of the user's body.

[0111] Here, the static load generating unit generates the static load in multiple stages by a plurality of springs drawn from a plurality of static load spring devices, and the plurality of springs can transmit the static load to the second device through a head mounting unit provided in the second device.

[0112] According to one or more embodiments, the static load generating unit can apply a static load to the user's body through the second device, the static load being adjusted in multiple stages by a plurality of static load spring devices for applying a multi-stage static load.

[0113] According to one or more embodiments, the static load spring device can generate the static load by at least one selected from a central spring device and two peripheral spring devices disposed on either side of the central spring device.

[0114] According to one or more embodiments of the method, the first device may apply the static load to the upper body of the user, and the second device may fix a static load generating unit that generates the static load at the waist of the user.

[0115] According to the present disclosure, when assisting the user's muscle strength, the muscle strength is assisted with a constant load, thereby preventing the user's discomfort or accidents due to sudden changes in load, and in particular, by generating multi-stage muscle strength assistance, the load can be adjusted according to the user's needs, enabling wide use.

[0116] While various embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that various modifications and variations can be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims. Therefore, modifications to future embodiments of the present invention will not depart from the scope 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; and A muscle assist device comprising a static load generating unit having a static load spring device installed on the first device and applying a static load to the second device.

2. In paragraph 1, The above static load generating unit is provided with multiple static load spring devices for applying multi-stage static loads. A muscle assist device, wherein each spring end of the static load spring devices is provided with a coupling head that is selectively coupled to the second device.

3. In paragraph 2, A muscle assist device, wherein the static load spring device comprises a central spring device and two peripheral spring devices arranged on either side of the central spring device.

4. In paragraph 3, A muscle assist device, wherein two coupling heads provided at the spring ends of each of the two outer spring devices are interconnected by a bridge.

5. In paragraph 4, A muscle assist device having a channel formed in the bridge through which the coupling head of the central spring is placed or passes.

6. In paragraph 5, A muscle assist device in which a seating portion is formed in the above channel to which the coupling head of the central spring is fixed.

7. In any one of paragraphs 1 to 6, 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 with respect to the frame of the first device, such that the coupling head is releasably fixed thereto, and A muscle assist device, wherein the coupling bracket is provided with a locking device that fixes the coupling head provided on each of the springs by an operating pin.

8. In paragraph 7, A muscle assist device, wherein the locking device is a plunger-type locking device having a cylindrical body fixed to the coupling bracket, an operating pin that reciprocates with respect to the cylindrical body, and a handle connected to the operating pin.

9. In paragraph 7, A muscle assist device, wherein the locking device is a plunger-type locking device having an elastic member that elastically biases a reciprocating operating pin to release the coupling head by fixing the pin.

10. In paragraph 9, A muscle assist device, wherein the first device is mounted on the user's waist, and the second device is mounted on the user's upper body.

11. A muscle strength assistance method that assists the user's muscle strength with a muscle strength assistance device. The above muscle assist device: 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 static load generating unit having a static load spring device installed on the first device and applying a static load to the second device; The above muscle strength assistance method: A first device worn on a part of the user's body applies a static load to a second device worn on another part of the user's body, A method for assisting muscle strength using a muscle strength assist device, wherein a static load generating unit installed in the first device applies a static load to the user in response to a change in the relative distance between the first device and the second device or a change in the body shape according to the user's body movement.

12. In paragraph 11, The above static load generating unit generates the static load in multiple stages by a plurality of springs drawn from a plurality of static load spring devices, A muscle strength assistance method in which the plurality of springs transmit the static load to the second device through a head mounting portion provided in the second device.

13. In paragraph 12, A muscle strength assistance method in which the static load generating unit applies a static load to the user's body through the second device, the static load being adjusted in multiple stages by a plurality of static load spring devices for applying a multi-stage static load.

14. In paragraph 11, A muscle strength assistance method in which the static load generating unit applies a static load to the user's body through the second device, the static load being adjusted in multiple stages by a plurality of static load spring devices for applying a multi-stage static load.

15. In paragraph 14, A method for assisting muscle strength using a muscle assist device, wherein the static load spring device generates the static load by at least one selected from a central spring device and two outer spring devices arranged on both sides of the central spring device.

16. In paragraph 15, The above first device applies the static load to the upper body of the user, A muscle strength assistance method in which the second device fixes a static load generating unit that generates the static load at the user's waist.

17. In paragraph 11, A method for assisting muscle strength using a muscle assist device, wherein the static load spring device generates the static load by at least one selected from a central spring device and two outer spring devices arranged on both sides of the central spring device.

18. In paragraph 12, A method for assisting muscle strength using a muscle assist device, wherein the static load spring device generates the static load by at least one selected from a central spring device and two outer spring devices arranged on both sides of the central spring device.

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