Assist device

Abstract

To reduce a sense of incongruity of a user in an assist device.SOLUTION: The assist device 10 includes the first body-worn unit 11 that is worn on at least one of the shoulder BS, the back BB, and the chest BC of the user, the second body-worn unit 12 that is worn on the leg BL, the driving device 40 that winds or unwinds the first belt 16 connected to the second body-worn unit 12, and the control box 14 that is connected to the first body-worn unit 11 and accommodates the driving device 40 therein. The control box 14 is worn on the back BB when the user wears the first harness 11, the control box 14 has the first surface 31 facing the back BB when worn on the back BB of the user and the second surface 32 opposite to the first surface 31, and the second surface 32 has the opening 33 for feeding the first belt 16 from the inside of the control box 14 to the outside and the sliding surface 34 on which the first belt 16 fed from the opening 33 slides.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to an assist device. [Background technology]

[0002] Various assist devices have been proposed that are worn on the body of a user (person) and assist the user in performing work. With these assist devices, the user can perform work with little force (little strain), even when lifting a heavy object, for example. Such an assist device is disclosed, for example, in Patent Document 1.

[0003] The conventional assisting device disclosed in Patent Document 1 includes a first attachment to be worn on the shoulders of the user, a second attachment to be worn on each of the left and right legs, a belt body provided along the back side (back and buttocks) of the user across the first and second attachments, and a control box having an actuator therein capable of winding up and unwinding the belt body. The conventional assisting device has a structure in which the belt body is unwound from the lower side of the control box (the waist side of the wearer) toward the legs (see Figure 10). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-074789 Summary of the Invention [Problem to be solved by the invention]

[0005] However, since the assist device is configured such that the belt body is fed from the underside of the control box toward the second attachment, the belt body may come into contact with the user's back, buttocks, etc. while the user is wearing the assist device and performing work, which may cause the user to feel uncomfortable due to contact with the belt body. The present disclosure aims to reduce the discomfort felt by a user in an assist device. [Means for solving the problem]

[0006] The assist device of the present disclosure comprises a first attachment device attached to at least one of the user's shoulders, back, and chest, a second attachment device attached to the user's legs, a drive device for winding or unwinding a belt body connected to the second attachment device, and a control box connected to the first attachment device and accommodating the drive device therein, wherein the control box is attached to the back of the user when the user wears the first attachment device, and has a first surface facing the back when attached to the user's back, and a second surface opposite the first surface, and the second surface has an opening for unwinding the belt body from within the control box to the outside, and a sliding surface for sliding the belt body unwound from the opening.

[0007] According to the present disclosure, the assist device can reduce the discomfort felt by the user. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a rear view showing an example of an assist device. [Figure 2] FIG. 2 is a front view showing an example of an assist device. [Figure 3] FIG. 2 is a rear view of the assist device attached to the user's body. [Figure 4] FIG. 2 is a side view of the assist device attached to the user's body. [Figure 5] FIG. 2 is a perspective view of a control box that constitutes the assist device. [Figure 6] FIG. 2 is a perspective view of the casing (cover) of the control box. [Figure 7] FIG. 2 is a perspective view of the inside of the control box and the casing (base). [Figure 8] FIG. 2 is a schematic cross-sectional view of the control box. [Figure 9] FIG. 2 is a perspective view of the control box with the exterior attachment attached. [Figure 10] FIG. 1 is a side view of a conventional assist device (attached to the user's body). DETAILED DESCRIPTION OF THE INVENTION

[0009] <Details of the embodiment of the present disclosure> Hereinafter, details of embodiments of the present disclosure will be described with reference to the drawings. Note that at least some of the embodiments described below may be combined in any manner.

[0010] (Overall configuration of the assist device) FIG. 1 is a rear view showing an example of an assisting device. FIG. 2 is a front view showing an example of an assisting device. FIG. 3 is a rear view of the assisting device attached to the body of a user. FIG. 4 is a side view of the assisting device attached to the body of a user. In the following description, left and right refer to the left and right of a user who is in an upright position wearing the assisting device, front and back refer to the front and back of the user, and up and down refer to the up and down of the user. The top is the side of the user's head, and the bottom is the side of the user's feet.

[0011] 1 and 2 includes a first attachment 11, two second attachments 12, a third attachment 13, and a control box 14. The first attachment 11, the second attachment 12, and the third attachment 13 are components for attaching the assist device 10 to the user's body.

[0012] The first wearing device 11 is worn on at least one of the left and right shoulders BS, the back BB, and the chest BC (see FIGS. 3 and 4), which are parts of the user's (person's) body. As shown in FIGS. 3 and 4, the first wearing device 11 of this embodiment is worn on the left and right shoulders BS. The first wearing device 11 has shoulder belts 21 and armpit belts 22. The shoulder belts 21 and armpit belts 22 are made of flexible fabric or the like.

[0013] As shown in Figures 3 and 4, the control box 14 is placed on the back BB of the user. One end of the shoulder belt 21 is connected to the upper side of the control box 14. One end of the armpit belt 22 is connected to the lower side of the control box 14 (to a support part 35 described later). The other end of the shoulder belt 21 and the other end of the armpit belt 22 are connected to each other.

[0014] By attaching the shoulder belt 21 and the armpit belt 22 to the shoulders BS, the control box 14 is carried on the user's back, and the control box 14 is positioned on the user's back BB. The control box 14 includes a casing 30, which will be described later.

[0015] The length of the armpit belts 22 is adjustable. By adjusting the length of the armpit belts 22, the control box 14 can be fitted closely to the user's back BB. Therefore, the control box 14 is attached in a state where it cannot move in the front-to-back, left-to-right, or up-and-down directions relative to the user's back BB.

[0016] 3 and 4, the second wearing device 12 is attached to the left and right legs BL of the user. Specifically, the second wearing device 12 is attached to the knees BN of the legs BL. The left and right second wearing devices 12 are symmetrical but have the same configuration.

[0017] The second wearing device 12 is made of flexible fabric or the like. The second wearing device 12 has a knee main body 23 that is worn on the rear side of the user's knee BN, and a knee belt 24 extending from the knee main body 23. The knee belt 24 encircles the knee BN at both the top and bottom of the knee BN, and its tip is fixed to the knee main body 23. The wrapping length of the knee belt 24 around the knee BN can be adjusted using a belt and buckle or a fastening member such as a hook-and-loop fastener. This adjustment brings the knee main body 23 into close contact with the rear side of the knee BN. The second wearing device 12 is worn on the knee BN so that it cannot move in the front-to-back, left-to-right, or up-and-down directions.

[0018] The first wearing device 11 and the two second wearing devices 12 are worn at two locations on either side of the user's hip joint, namely, the shoulders BS and the legs BL. In this embodiment, the legs BL refer to the area below the hip joint, and the lower back BW refers to the area including the pelvis above the hip joint and some or all of the lumbar vertebrae. The chest BC refers to the anterior part of the user's thoracic vertebrae, and the back BB refers to the posterior part of the user's thoracic vertebrae. The shoulders BS refer to the area located in the left-right direction between the base of the user's neck and the shoulder joint.

[0019] The first wearing device 11 and the second wearing device 12 may have configurations other than those described above. The first wearing device 11 may include, for example, a hard member as a portion to be hung on the shoulders BS. The first wearing device 11 may be worn not only on the shoulders BS of the user, but also on the chest BC and / or back BB. For example, the first wearing device 11 may be in the form of a belt wrapped around the chest BC and back BB of the user. Furthermore, the first wearing device 11 may be in the form of a vest worn on the upper body as an upper garment of the user.

[0020] The third wearing device 13 is worn on the waist BW of the user. The third wearing device 13 is made of flexible fabric or the like. The third wearing device 13 is formed in a belt shape and is worn by wrapping it around the waist BW. Both ends of the third wearing device 13 are provided with locking members such as buckles or hook-and-loop fasteners (not shown). The third wearing device 13 is fixed to the waist BW by wrapping the third wearing device 13 around the waist BW and locking the locking members at both ends of the third wearing device 13 together.

[0021] The assist device 10 further includes a belt member 15 in addition to the first wearing device 11, the second wearing device 12, and the third wearing device 13. The belt member 15 is provided along the back side of the user so as to connect the first wearing device 11 and the second wearing device 12. The belt member 15 includes a first belt 16, a second belt 17, and a connecting member 18.

[0022] The first belt 16 is attached to the upper body side. The second belt 17 is attached to the lower body side. The connecting member 18 connects the first belt 16 and the second belt 17. The first belt 16 and the second belt 17 are each long and flexible. The connecting member 18 is made of a resin buckle. Alternatively, a rectangular ring-shaped metal body called a "flat ring" may be used as the connecting member 18.

[0023] Each of the first belt 16 and the second belt 17 is a belt-like member made of cloth or leather, and can be bent to fit the shape of the body. Each of the first belt 16 and the second belt 17 may be a string-like belt (a wire-like member). Each of the first belt 16 and the second belt 17 in this embodiment may be made of a non-stretchable member. However, if a non-stretchable member is used for the first belt 16 and the second belt 17, it is necessary to interpose a stretchable member between the first belt 16 and the second belt 17.

[0024] (About the control box) FIG. 5 is a perspective view of a control box constituting the assist device. FIG. 6 is a perspective view of a casing (cover) of the control box. FIG. 7 is a perspective view of the interior of the control box and the casing (base). FIG. 8 is a cross-sectional schematic view of the control box. As shown in FIG. 5, the control box 14 constituting the assist device 10 includes a casing 30. As shown in FIGS. 5 to 7, the casing 30 includes a cover 30a and a base 30b. The cover 30a covers the base 30b. The base 30b is plate-shaped. The casing 30 is made of a material harder than the belt body 15, such as an aluminum alloy or a hard synthetic resin. In the casing 30 of this embodiment, the base 30b may constitute a part of the first attachment 11. A space is formed between the cover 30a and the base 30b. As shown in FIG. 7, the drive unit 40 is housed in this space.

[0025] As shown in Figures 4 and 5, the casing 30 has a first surface 31 and a second surface 32. The first surface 31 faces the back BB when the user wears the first wearing device 11 and the third wearing device 13 and carries the control box 14 on the back BB. The first surface 31 is part of the base 30b. The second surface 32 is formed on the surface of the casing 30 opposite to the first surface 31. The second surface 32 is part of the cover 30a.

[0026] 5 and 6, the second surface 32 further includes an opening 33 and a sliding surface 34. The opening 33 is an opening for feeding the belt body 15 (first belt 16) from the inside to the outside of the casing 30. The sliding surface 34 is a guide surface for sliding the belt body 15 (first belt 16) fed out from the opening 33 along the casing 30.

[0027] As shown in FIGS. 5 and 6 , the casing 30 (cover 30a) has a pair of support portions 35, 35 extending laterally at the lower end portion 30c. The support portions 35 are portions that come into contact with the user's buttocks BH when the user wears the first attachment 11 and the third attachment 13 and carries the control box 14 on their back BB. More specifically, the support portions 35 are configured to come into contact with the upper portions of the user's buttocks BH (between the lower back and buttocks BH). Therefore, when the user carries the control box 14 on their back BB, the weight of the control box 14 can be borne by the buttocks BH via the support portions 35. The assist device 10 of the present disclosure has support portions 35 on both the left and right sides of the user's buttocks BH, which can prevent misalignment between the user's body and the control box 14.

[0028] 5 and 6, in the assisting device 10 of this embodiment, the support part 35 is formed integrally with the casing 30. Specifically, the support part 35 is a part of the cover 30a. The assisting device 10 of this embodiment is provided with the support part 35 without increasing the number of parts.

[0029] The third attachment 13 is connected to the support part 35 of the control box 14. As shown in Fig. 4, when the user attaches the third attachment 13 to the waist BW, the support part 35 of the assist device 10 comes into contact with the user's buttocks BH. Then, when the support part 35 comes into contact with the user's buttocks BH, the control box 14 is supported by the user's buttocks BH.

[0030] 5 and 6, the casing 30 (cover 30a) further includes a pair of left and right standing wall portions 36, 36. The standing wall portions 36 are provided at the end of the support portion 35 on the second surface 32 side. The standing wall portions 36 are walls extending in a direction substantially perpendicular to the sliding surface 34. The standing wall portions 36 restrict left and right displacement of the belt body 15 (first belt 16) sliding substantially up and down along the sliding surface 34.

[0031] The casing 30 further includes a plate 37. The plate 37 is a member for sealing (blinding) a part of the opening 33. The plate 37 prevents the inside of the casing 30 (the drive unit 40) from being exposed through the opening 33. The belt body 15 (first belt 16) is fed out of the casing 30 through a gap secured between the lower part of the opening 33 and the plate 37.

[0032] 7 and 8, the casing 30 accommodates therein a drive unit 40. The drive unit 40 is a device that drives (winds and unwinds) the belt body 15, and includes an actuator 41, a control unit 42, a battery 43, etc. Therefore, the casing 30 accommodates the actuator 41, the control unit 42, the battery 43, etc. The first belt 16 of the belt body 15 passes through the opening 33.

[0033] The actuator 41 extends and contracts the belt body 15 between the first attachment 11 and the second attachment 12. Specifically, the actuator 41 enables winding and unwinding of a portion of the belt body 15. The actuator 41 includes a motor 45, a reducer 46, and a drive pulley 47.

[0034] In the control box 14 of this embodiment, the motor 45 is a brushless DC motor. The motor 45 can rotate at a predetermined torque and a predetermined number of rotations based on a drive signal output from the control unit 42. The motor 45 can rotate forward and reverse based on the drive signal output from the control unit 42. Rotation-related parameters of the motor 45, such as the rotation angle, rotation speed, or number of rotations, are detected by a rotation detector 48 attached to the motor 45. Note that the rotation detector 48 in this embodiment is a rotary encoder, but may also be a Hall sensor or a resolver. The detection result of the rotation detector 48 is input to the control unit 42. The control unit 42 controls the operation of the motor 45 based on the detection result, thereby allowing the assist device 10 to generate an appropriate assist force.

[0035] The reducer 46 is composed of multiple gears and reduces the rotation speed of the motor 45 to rotate an output shaft 46a of the reducer 46. A drive pulley 47 is connected to the output shaft 46a, and they rotate integrally. One end of the first belt 16 is attached to the drive pulley 47. When the drive pulley 47 rotates in one direction due to the forward rotation of the motor 45, the first belt 16 is wound onto the drive pulley 47. When the drive pulley 47 rotates in the other direction due to the reverse rotation of the motor 45, the first belt 16 is fed out from the drive pulley 47.

[0036] As described above, the actuator 41 has the drive pulley 47 capable of winding up the belt body 15, and the motor 45 for causing the drive pulley 47 to perform the winding operation of the belt body 15. The first belt 16 is wound up and fed out by the actuator 41.

[0037] The control unit 42 is composed of a control unit including a microcomputer. The control unit 42 controls the operation of the actuator 41 (motor 45). The control unit 42 receives a signal from a sensor (not shown) and estimates the user's posture based on the signal from the sensor. The battery 43 supplies power to the control unit 42, the motor 45, the rotation detector 48, etc.

[0038] (About exterior fittings) Fig. 9 is a perspective view of the control box with the exterior attached. As shown in Fig. 9, when the assist device 10 is actually in use, the control box 14 is fitted with an exterior 19. The exterior 19 is made of a stretchable mesh material such as cloth, and serves as a protective cover that covers part of the control box 14. The exterior 19 has an opening 19a formed therein for passing the belt body 15 therethrough. The opening 19a is formed in a position that allows part of the sliding surface 34 to be exposed to the outside.

[0039] In the assist device 10, the belt body 15 (first belt 16) that is fed out from the opening 33 and extends downward along the sliding surface 34 is restricted from displacement in a direction perpendicular to the sliding surface 34 by the exterior fitting 19, and its displacement in the left-right direction is restricted by the standing wall portion 36. With this configuration, the assist device 10 of this embodiment can reliably prevent the belt body 15 from shifting by the sliding surface 34, the standing wall portion 36, and the exterior fitting 19 even when the user assumes various postures.

[0040] (About cushioning materials) 2, the assisting device 10 of this embodiment further includes a cushion member 25 provided on the first surface 31 side of the control box 14. In the assisting device 10 of this embodiment, the cushion member 25 includes a first cushion member 26, a second cushion member 27, and a third cushion member 28.

[0041] The first cushion member 26 is disposed between the first surface 31 of the casing 30 and the user's back BB. The second cushion member 27 and the third cushion member 28 are disposed between the pair of left and right support sections 35, 35 of the casing 30 and the user's buttocks BH. The second cushion member 27 is disposed between the support section 35 disposed on the right side of the user and the user's buttocks BH. The third cushion member 28 is disposed between the support section 35 disposed on the left side of the user and the user's buttocks BH.

[0042] The first cushion member 26, the second cushion member 27, and the third cushion member 28 are spaced apart from one another. Therefore, in the control box 14 of this embodiment, a space X is secured between the first cushion member 26, the second cushion member 27, and the third cushion member 28. The space X allows the assist device 10 of this embodiment to ensure good ventilation between the control box 14 and the user's back BB.

[0043] In the assist device 10, the cushion members 25 (first cushion member 26, second cushion member 27, and third cushion member 28) are fixed to the exterior device 19 using fixing members (not shown) such as hook-and-loop fasteners. Since the cushion members 25 of this embodiment are fixed to the exterior device 19 using hook-and-loop fasteners, the fixing positions can be adjusted to fit the user's body shape.

[0044] (Regarding the positional relationship between the user and the belt) Fig. 10 is a side view of a conventional assisting device (attached to the user's body). As shown in Fig. 10, the conventional assisting device 110 differs from the assisting device 10 of this embodiment (see Fig. 4) in that it includes a control box 114. Note that in Fig. 10, among the reference numerals given to the conventional assisting device 110, parts that have the same configuration as the assisting device 10 of this embodiment (see Fig. 4) are given the same reference numerals as the assisting device 10, and a description of those parts will be omitted.

[0045] As shown in FIG. 10 , the control box 114 includes a casing 130. The casing 130 includes an opening 133 formed at its bottom end. In the conventional assisting device 110, the belt 15 (first belt 16) is fed out through the opening 133 located at the bottom end of the casing 130. Therefore, when a user wears the assisting device 110, the belt 15 (first belt 16, second belt 17, and connecting member 18) comes out of the control box 114, passes near the user's buttocks BH, and is then connected to the second wearing tool 12. In this case, the gap between the belt 15 (first belt 16, second belt 17, and connecting member 18) and the buttocks BH is referred to as gap D2.

[0046] 4, in the assist device 10 of this embodiment, the belt body 15 (first belt 16) is fed out from inside the casing 30 through an opening 33 formed in the second surface 32, extends along the sliding surface 34, passes near the user's buttocks BH, and is connected to the second wearing tool 12. In this case, the gap between the belt body 15 (first belt 16, second belt 17, and connecting member 18) and the buttocks BH is referred to as gap D1.

[0047] As can be seen from a comparison of FIGS. 4 and 10 , the gap D1 when the assisting device 10 of this embodiment is used is larger than the gap D2 when the conventional assisting device 110 is used. In other words, when the assisting device 10 of this embodiment is used, a sufficient gap D2 is ensured between the belt 15 and the user's back BB and buttocks BH to prevent contact. The assisting device 10 configured as described above sends out the belt 15 (first belt 16) from the second surface 32 of the control box 14 and then slides the belt 15 along the sliding surface 34, thereby increasing the gap D2 between the belt 15 and the buttocks BH compared to conventional devices. This reduces contact between the belt 15 and the user's back BB and buttocks BH. The assisting device 10 of the present disclosure thus reduces the user's discomfort.

[0048] (Regarding the size of the control box) As shown in FIG. 4, the control box 14 of this embodiment has a size such that, when the first attachment 11 is worn by a user, its lower end 30c reaches the user's buttocks BH. Therefore, in the assist device 10 of this embodiment, the support portion 35 of the casing 30 of the control box 14 comes into contact with the user's buttocks BH when worn by the user. In the control box 14 of this embodiment, the sliding surface 34 is formed in a range from the opening 33 to the lower end 30c of the casing 30. Note that the "lower end 30c of the casing 30" in this embodiment refers to a region including the lower ends of the support portions 35 arranged on the left and right and the lower end of the casing 30 located between the support portions 35.

[0049] With this configuration, the assist device 10 of this embodiment can slide the belt body 15 on the control box 14. This prevents the belt body 15 from sliding on the back BB and buttocks BH of the user, thereby reducing the discomfort felt by the user.

[0050] (Battery placement in the control box) As shown in FIG. 8, in the control box 14 of this embodiment, the battery 43 is housed in the casing 30 below the opening 33 formed in the casing 30.

[0051] In a conventional assist device 110 (see FIG. 10 ), an opening 133 for feeding the belt body 15 (first belt 16) from inside the casing 130 to the outside was formed at the bottom end of the casing 130. Therefore, in the conventional assist device 110, the actuator and other components were arranged below the casing 130, making it difficult to secure space below the casing 130 to accommodate a battery. Therefore, in the conventional assist device 110, the battery had to be arranged above the actuator and other components, and as a result, was arranged above the casing 130. If the battery, which is a heavy object, is arranged above the control box 114, the center of gravity of the control box 114 becomes higher, which is a factor in the user feeling that the control box 114 is heavy when carrying the control box 114 on their back. In other words, the conventional assist device 110 has a structure that makes the control box 114 easily feel heavy to the user.

[0052] On the other hand, as shown in FIG. 8 , in the assisting device 10 of the present disclosure, the battery 43 is housed in the casing 30 below the opening 33 formed in the casing 30. In other words, the battery 43 is housed inside the control box 14 below the opening 33. In the assisting device 10, the opening 33 is provided in the second surface 32, which makes it possible to arrange the actuator 41 and the like on the upper side of the casing 30, thereby making it possible to secure space for housing the battery 43 on the lower side of the casing 30. Furthermore, in the assisting device 10 of the present disclosure, by housing the battery 43 on the lower side of the casing 30, it is possible to lower the center of gravity of the control box 14 compared to conventional devices. As a result, the assisting device 10 of the present disclosure can reduce the weight felt by the user when carrying the control box 14 on their back.

[0053] [Operations and Effects of the Present Embodiment] (1) The assisting device 10 of the above embodiment includes a first attachment 11 attached to at least one of the user's shoulders BS, back BB, and chest BC; a second attachment 12 attached to the user's legs BL; a drive unit 40 for winding or unwinding a first belt 16 connected to the second attachment 12; and a control box 14 connected to the first attachment 11 and accommodating the drive unit 40. In the assisting device 10 of the above embodiment, the control box 14 is attached to the user's back BB when the user wears the first attachment 11. The control box 14 has a first surface 31 that faces the user's back BB when attached to the user's back BB, and a second surface 32 opposite the first surface 31. In the assisting device 10 of the above embodiment, the second surface 32 has an opening 33 for unwinding the first belt 16 from inside the control box 14 to the outside, and a sliding surface 34 along which the first belt 16 unwound from the opening 33 slides.

[0054] The assisting device 10 configured as described above can ensure a gap D2 between the user's back BB and buttocks BH and the belt 15 by sliding the belt 15 (first belt 16) on the second surface 32 of the control box 14, thereby preventing contact between the belt 15 and the user's back BB. This reduces the user's discomfort. Furthermore, because the belt 15 can slide on the control box 14, there is no need to provide a separate member to prevent contact between the user's back BB and the belt 15. This allows the overall length of the assisting device 10 to be shortened and the number of parts of the assisting device 10 to be reduced.

[0055] (2) In the assist device 10 of the above embodiment, the control box 14 has a size such that the lower end 30c reaches the buttocks BH of the user when attached to the user's back. In the control box 14 of the above embodiment, the sliding surface 34 is formed in the range from the opening 33 to the lower end 30c of the control box 14. The assist device 10 configured as described above can reliably ensure a gap D2 between the user's back BB and buttocks BH and the belt body 15. This prevents the belt body 15 from sliding on the user's back BB and buttocks BH, reliably reducing the user's discomfort.

[0056] (3) The assist device 10 of the above embodiment further includes a battery 43 that serves as a drive source for the drive device 40. In the assist device 10 of the above embodiment, the battery 43 is housed inside the control box 14 below the opening 33. In the assist device 10 configured as described above, the battery 43, which is a heavy object, is positioned lower, thereby lowering the center of gravity of the control box 14. This reduces the weight felt by the user when carrying the control box 14 on their back.

[0057] The embodiments disclosed herein are illustrative in all respects and are not restrictive. The scope of the present invention is not limited to the above-described embodiments, but includes all modifications within the scope of equivalents to the configurations described in the claims. [Explanation of symbols]

[0058] 10: Assist device 11:First fitting 12:Second fitting 14: Control box 15: Belt body 16: First Belt 30: Casing 30c: Bottom end 31: Front page 32:Second side 33: Opening 34: Sliding surface 40: Drive unit 43: Battery BS: (user's) shoulders BB: (user's) back BC: (User's) Chest BH: (user's) buttocks

Claims

1. a first wearing device worn on at least one of a shoulder, a back, and a chest of a user; A second attachment to be attached to the leg of the user; a drive device for winding or unwinding a belt body connected to the second attachment; a control box connected to the first mounting fixture and accommodating the drive device therein; The control box When the user wears the first wearing device, the first wearing device is worn on the user's back, a first surface facing the back of the user when the device is attached to the back of the user; a second surface opposite the first surface, The second surface is an opening for feeding the belt body from inside the control box to the outside; a sliding surface that slides the belt body fed out from the opening.

2. the control box has a size such that a lower end thereof reaches the buttocks of the user when attached to the back of the user, The assist device according to claim 1 , wherein the sliding surface is formed in a range from the opening to a lower end of the control box.

3. Further, a battery is provided as a power source for the drive device.

3. The assist device according to claim 1, wherein the battery is housed inside the control box below the opening.

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