Support devices

Abstract

A support orthosis (100) comprises: an attachment part (10) to be attached to an article (2) worn by a wearer; a link mechanism (20) that is connected to the attachment part, is changed to a first state in response to a crouching motion of the wearer upon being brought into contact with the floor and receiving the body weight of the wearer, and is changed to a second state in response to a standing-up motion of the wearer; and a sheet (30) that is connected to the link mechanism (20) and is capable of supporting the buttocks of the wearer. The link mechanism has a link member (24) that is brought into contact with the floor in response to a crouching motion of the wearer and is separated from the floor in response to a standing-up motion of the wearer. The link member is disposed lateral to a thigh of the wearer in a standing posture of the wearer.

Description

Technical Field

[0001] The present disclosure relates to a support device.

Background Art

[0002] There is a support system that supports the wearer's squatting posture (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional support system, a lever arm is provided in front of the wearer's thigh. Since this lever arm is pushed by the thigh, the link mechanism of the support system operates. Thus, when the lever arm is arranged in front of the wearer's thigh, the wearer may feel that the lever arm is in the way.

[0005] The present disclosure provides a support device capable of operating the link mechanism even without a lever arm arranged in front of the wearer's thigh.

Means for Solving the Problems

[0006] The support device according to the embodiment of this disclosure comprises: an attachment portion attached to the wearer's clothing; a link mechanism connected to the attachment portion, which changes to a first state in response to the wearer's squatting motion by receiving the wearer's weight, and changes to a second state in response to the wearer's standing motion; and a seat connected to the link mechanism. The link mechanism has a link member that contacts the floor in response to the wearer's squatting motion and changes state in response to the wearer's weight, and moves away from the floor in response to the wearer's standing motion. The link member is positioned to the side of the wearer's thigh when the wearer is standing. [Effects of the Invention]

[0007] The aforementioned means allow the linkage mechanism to operate even without the lever arm positioned in front of the wearer's thigh. The aforementioned means support the wearer's crouching posture and reduce the risk of the wearer hitting objects around them when standing. [Brief explanation of the drawing]

[0008] [Figure 1] This is a side view of a support device according to the first embodiment of the present invention. [Figure 2] Figure 1 is a perspective view showing the support device from an oblique angle above. [Figure 3] This is a side view showing the standing posture of a person wearing a support brace. [Figure 4] This is a side view showing a wearer in a squatting position while wearing a support brace. [Figure 5] This is a perspective view showing the seat, seat frame, and arm of a support orthosis. [Figure 6] This is a side view showing the seat frame and arm of the support device. [Figure 7] This is a side view showing the wearer in a squatting position. [Figure 8] This is a side view illustrating the operation of the support device. [Figure 9] This is a side view illustrating the operation of the support device. [Figure 10]It is a side view showing the operation of the support device. [Figure 11] It is a side view showing the operation of the support device. [Figure 12] It is a side view showing the operation of the support device. [Figure 13] It is a side view showing the standing posture of a wearer wearing the support device according to the second embodiment. [Figure 14] It is a side view showing the squatting posture of a wearer wearing the support device according to the second embodiment. [Figure 15] It is a side view showing the squatting posture of a wearer wearing the support device according to the third embodiment. [Figure 16] It is a perspective view showing the link mechanism of the support device according to the third embodiment. [Figure 17] It is a schematic side view showing the closed state of the link mechanism of the support device according to the fourth embodiment. [Figure 18] It is a schematic side view showing the open state of the link mechanism of the support device according to the fourth embodiment. [Figure 19] It is a side view showing the support device according to the fifth embodiment. [Figure 20] It is a side view showing the standing posture of a wearer wearing the support device according to the fifth embodiment. [Figure 21] [[ID=]33]It is a side view showing the squatting posture of a wearer wearing the support device according to the fifth embodiment. [Figure 22] It is a side view showing the squatting posture of a wearer wearing the support device according to the fifth embodiment. [Figure 23] It is a rear view showing the squatting posture of a wearer wearing the support device according to the fifth embodiment. [Figure 24] It is a side view showing the support device according to the sixth embodiment, and is a view showing a state corresponding to the standing posture of the wearer. [Figure 25] It is a side view showing the squatting posture of a wearer wearing the support device according to the sixth embodiment. [Figure 26]It is a side view showing the standing posture of a wearer wearing the support device according to the reference form. [Figure 27] It is a side view showing the squatting posture of a wearer wearing the support device according to the reference form. [Figure 28] It is a side view showing a wearer in a state of being supported by a support device according to the prior art. [Figure 29] It is a side view showing the standing posture of a wearer wearing a support device according to the prior art.

Mode for Carrying Out the Invention

[0009] (First Embodiment) First, referring to FIGS. 1 to 4, the support device 100 according to the first embodiment of the present invention will be described. FIG. 1 is a side view of the support device 100, FIG. 2 is a perspective view showing the support device 100 from obliquely above, FIG. 3 is a side view showing the standing posture of the wearer H wearing the support device 100, and FIG. 4 is a side view showing the squatting posture of the wearer H wearing the support device 100. In each figure, the X-axis direction, the Y-axis direction, and the Z-axis direction, which are three mutually orthogonal directions, may be shown. Also, in the description of the support device 100, the terms "front" and "rear" may be used. "Front" and "rear" are based on the direction of the wearer H wearing the support device 100, with the side having the "abdomen" being "front" and the side having the "back" being "rear".

[0010] The support orthosis 100 supports the wearer H in a squatting position and can bear a portion of the wearer H's weight in a squatting position. The support orthosis 100 comprises an attachment 10, a link mechanism 20, and a seat 30. The support orthosis 100 comprises a plurality of attachments 10 and a plurality of link mechanisms 20. The plurality of attachments 10 are spaced apart in the X-axis direction. The X-axis direction is, for example, along the width direction of the wearer H. The width direction of the wearer is, for example, the direction in which the left and right feet face each other when the wearer H is standing upright. The plurality of link mechanisms 20 are spaced apart in the X-axis direction. The attachments 10 and link mechanisms 20 are arranged on both sides in the width direction of the wearer H.

[0011] Attachment 10 is an example of a mounting part that can be attached to the wearer H's clothing. Attachment 10 has a clip 11 and can be attached to the belt 2, which is the clothing. The clothing is not limited to the belt 2, but may be other clothing such as trousers or work clothes. Attachment 10 may be detachable from the clothing, or may be integrally provided with the belt 2, for example. Attachment 10 may have a fixing plate for fixing the link mechanism 20.

[0012] The link mechanism 20 is, for example, a four-bar link mechanism. The link mechanism 20 may also be a parallel link mechanism. The link mechanism 20 has links 21 to 24. Link 21 is an example of a first link and is connected to the attachment 10. Link 21 is fixed to the attachment 10, for example, with bolts. Link 21 is a rod-shaped member and has a predetermined length.

[0013] Link 22 is an example of a second link and is supported so as to be swingable relative to link 21. Link 22 is connected to link 21 via a rotary joint 25. The rotary joint 25 has a rotation axis that extends in the X-axis direction. The rotary joint 25 connects links 21 and 22 so as to be swingable relative to each other. Holes are formed in links 21 and 22 through which the rotation axis of the rotary joint 25 is inserted. The rotation axis of the rotary joint 25 may be fixed to link 21 or link 22.

[0014] Link 23 is an example of a third link and is supported so as to be swingable relative to link 21. Link 23 is connected to link 21 via a rotary joint 26. The rotary joint 26 has a rotation axis that extends in the X-axis direction. The rotary joint 26 connects links 21 and 23 so as to be swingable relative to each other. Holes are formed in links 21 and 23 through which the rotation axis of the rotary joint 26 is inserted.

[0015] The rotary joints 25 and 26 are spaced apart in the longitudinal direction of the link 21. Rotary joint 25 is positioned closer to the attachment 10 than rotary joint 26. Rotary joint 26 is connected to the end of the link 21 that is further away from the attachment 10.

[0016] Link 23 contacts the floor FL when the support device 100 supports the wearer in a squatting position. The upper end 23a of link 23 is connected to link 21. The lower end 23b of link 23 is the end furthest from link 21. In the wearer H's squatting position, the lower end 23b of link 23 contacts the floor FL. Link 23 is an example of a link member that contacts the floor in response to the wearer H's squatting movement and changes posture by receiving the wearer's weight.

[0017] Link 24 is an example of a fourth link, connected to link 22 via a rotary joint 27 and to link 23 via a rotary joint 28. The upper end 24a of link 24 is connected to the lower end of link 22. The rotary joint 27 is connected to the lower end of link 22. Link 24 is connected to link 22 via the rotary joint 27 and is swingable relative to link 22. Link 24 is an example of a link member that contacts the floor in response to the squatting motion of the wearer H and changes its posture by receiving the wearer's weight.

[0018] The rotational joint 28 is located at the intersection of link 23 and link 24 when the support orthosis 100 is viewed from the side. Link 24 is pivotable relative to link 23. As links 23 and 24 rotate relative to each other, the upper end 23a of link 23 and the upper end 24a of link 24 move closer together or further apart, and the lower end 23b of link 23 and the lower end 24b of link 24 move closer together or further apart.

[0019] The link mechanism 20 is deformable between an open state and a closed state. The open state is an example of the first state, and the closed state is an example of the second state. As shown in Figures 1 and 4, the open state is defined as the state in which the lower end 23b of link 23 and the lower end 24b of link 24 are separated. As shown in Figure 3, the closed state is defined as the state in which the lower end 23b of link 23 and the lower end 24b of link 24 are close together. When the wearer H is in a standing position, the link mechanism 20 is in the closed state, and when the wearer H is in a crouching position, the link mechanism 20 is in the open state.

[0020] Figure 5 is a perspective view showing the seat 30, seat frame 31, and arm 32B of the support orthosis 100. Figure 6 is a side view showing the seat frame 31 and arm 32 of the support orthosis 100. The arm 32B shown in Figure 5 and the arm 32 shown in Figure 6 have different arm angles. In Figure 6, arm 32B is shown by a dashed line. The support orthosis 100 comprises a seat 30 on which the wearer H can sit, a seat frame 31 that supports the seat 30, and an arm 32 connected to a link mechanism 20. The support orthosis 100 may also be equipped with an arm 32B instead of arm 32.

[0021] When wearer H is wearing the support brace 100, the seat 30 is positioned to cover wearer H's buttocks. When wearer H is standing, the seat 30 is positioned behind wearer H's buttocks. When wearer H is squatting, the seat 30 is positioned below wearer H's buttocks.

[0022] The support device 100 comprises a plurality of seat frames 31. The plurality of seat frames 31 are spaced apart in the width direction of the wearer H. The seat frames 31 may be curved to conform to the shape of the wearer H's buttocks. The seat frames 31 are positioned on both sides of the seat 30 in the X-axis direction.

[0023] The sheet frame 31 supports bars 33 and 34 that extend in the X-axis direction. Bar 33 is an example of a first bar, and bar 34 is an example of a second bar. Holes 35 and 36 are formed in the sheet frame 31 for supporting bars 33 and 34. Hole 35 is an example of a first retaining part, and hole 36 is an example of a second retaining part. Holes 35 and 36 are provided at both ends in the longitudinal direction of the sheet frame 31. The sheet 30 is supported by the sheet frame 31 via bars 33 and 34. The sheet 30 is provided with bag-like portions 37 and 38. Bag-like portions 37 and 38 are parts of the sheet 30 that are folded back to form a bag shape. Bag-like portion 37 is an example of the front end of the sheet 30, and bag-like portion 38 is an example of the rear end of the sheet 30. Bars 33 and 34 are inserted through the bag-like portions 37 and 38. Furthermore, the seat 30 is not limited to being supported via bars 33 and 34; the seat 30 may also be directly attached to the seat frame 31.

[0024] The arm 32 protrudes from the seat frame 31 when viewed from the X-axis direction. The arm 32 is connected to the link 24 via a rotary joint 29 shown in Figure 1. The arm 32 is provided with a hole 39 through which the rotation axis of the rotary joint 29 is inserted. The rotation axis of the rotary joint 29 extends in the X-axis direction. The arm 32 is connected by the rotary joint 29 and is pivotably supported by the link 24.

[0025] As shown in Figure 6, arm 32 is inclined forward of arm 32B. In the direction in which a hypothetical straight line L1 passing through holes 35 and 36 extends, the side closer to hole 35 is considered forward, and the side closer to hole 36 is considered backward. The hole 39 in arm 32 is located closer to hole 35 than the hole 39 in arm 32B. In other words, the center of rotation of arm 32 is located forward of the center of rotation of arm 32B.

[0026] The connection point 41 between the seat frame 31 and the arm 32 is positioned closer to hole 35 than to hole 36. In other words, in the seat frame 31, the length from the connection point 41 to hole 36 is longer than the length from the connection point 41 to hole 35.

[0027] Figure 7 is a side view showing the wearer in a squatting position, illustrating the position and direction of the force transmitted from the wearer's buttocks. Note that the support device 100 is simplified in Figure 7. When force Fhip acts on the seat frame 31 in front of the rotation center of the rotary joint 29, the seat frame 31 tends to move backward. When force Fhip acts on the seat frame 31 behind the rotation center of the rotary joint 29, the seat frame 31 tends to move forward.

[0028] In Figure 6, the seat frame 31 connected to the arm 32 has its rotation center at the front due to the rotation joint 29, compared to the seat frame 31 connected to the arm 32B. Therefore, the force Fhip is more likely to act on the rear part of the seat frame 31. As a result, the seat frame 31 moves easily forward and not easily backward, so it can stably support the buttocks of the wearer H. If the seat frame 31 moves more easily backward than the buttocks of the wearer H, there is a risk that the buttocks of the wearer H may fall to the floor FL. In the support orthosis 100, since the seat frame 31 moves easily forward, the seat 30 is more easily positioned below the buttocks, and the buttocks of the wearer H can be stably supported in a squatting position.

[0029] Next, the operation of the support device 100 will be described. Figures 8 to 12 are side views showing the operation of the support device 100. When the wearer changes from a standing position to a squatting position, the support device 100 changes sequentially as shown in Figures 8 to 12.

[0030] In the standing posture of wearer H shown in Figure 3, the link mechanism 20 is in a closed state and is arranged in a generally straight line. When viewed in the X-axis direction, the attachment 10 is located near the center of the side of wearer H. The lower ends 23b and 24b of links 23 and 24 are located behind or on the side of wearer H's thigh when viewed from the X-axis direction. The lower ends 23b and 24b of links 23 and 24 may also be positioned to overlap wearer H's thigh when viewed from the X-axis direction. The lower ends 23b and 24b of links 23 and 24 are located above wearer H's knee. The lower end 24b of link 24 is located behind and below the lower end 23b of link 23.

[0031] In the wearer H's standing position, the arm 32 extends backward from the rotational joint 29. The seat frame 31 and seat 30 are positioned along the Z-axis so as to follow the wearer H's buttocks. The Z-axis direction is also the vertical direction. The end 31b of the seat frame 31 is positioned at approximately the same height as the belt 2. The end 31a of the seat frame 31 is positioned higher than the lower ends 23b and 24b of the links 23 and 24.

[0032] As shown in Figure 8, when the wearer H is seated, the link mechanism 20 has begun to open, and the lower ends 23b and 24b of links 23 and 24 are beginning to separate. The lower ends 23b and 24b of links 23 and 24 are located below the wearer H's buttocks and behind the calves. In this state, the lower ends 23b and 24b of links 23 and 24 are located above the floor FL.

[0033] In the configuration shown in Figure 8, the arm 32 is positioned so as to overlap the link 24 when viewed in the X-axis direction. The seat 30 and seat frame 31 may be positioned along the horizontal direction. The end 31a of the seat frame 31 is positioned so as to be in contact with the wearer H's thigh. In this configuration, the seat frame 31 is positioned at approximately the same height as the wearer H's knee. At this time, the wearer H's buttocks are positioned higher than the knee.

[0034] In the state shown in Figure 9, the wearer H's buttocks are positioned lower than in the state shown in Figure 8. In this state, the wearer H's knees, thighs, and buttocks are at approximately the same height. In this state, the lower end 24b of link 24 is in contact with the floor FL, but the lower end 23b of link 23 is not in contact with the floor FL. The lower ends 23b and 24b are located behind the wearer's heels and below the buttocks. Link 23 swings relative to link 24, and the distance between the lower ends 23b and 24b is greater than in the state shown in Figure 8.

[0035] In the state shown in Figure 9, the arm 32 and the seat frame 31 swing relative to the link 24 and move further forward than in the state shown in Figure 8. The end 31a of the seat frame 31 is located above the end 31b. The end 31a is located behind the knee and below the thigh.

[0036] In the state shown in Figure 10, the wearer H's buttocks are positioned lower than in the state shown in Figure 9. In this state, the link mechanism 20 is more open than in the state shown in Figure 9. Link 23 swings relative to link 24, and the lower end 23b of link 23 has moved further forward than in the state shown in Figure 9. In the state shown in Figure 10, the distance between the lower end 23b and the lower end 24b is greater than in the state shown in Figure 9. The lower end 23b of link 23 is positioned to overlap with the wearer H's heel when viewed in the X-axis direction. In this state, the lower end 23b is not in contact with the floor FL.

[0037] In the state shown in Figure 11, the wearer H's buttocks are positioned lower than in the state shown in Figure 10. In this state, the link mechanism 20 is more open than in the state shown in Figure 10. Link 23 swings relative to link 24, and the lower end 23b of link 23 has moved further forward than in the state shown in Figure 10. In the state shown in Figure 11, the distance between the lower end 23b and the lower end 24b is greater than in the state shown in Figure 10. When viewed in the X-axis direction, the lower end 23b of link 23 is positioned closer to the wearer H's toes than to their heels. In this state, the lower end 23b is not in contact with the floor FL.

[0038] In the squatting position of wearer H shown in Figure 12, wearer H's buttocks are positioned lower than in the state shown in Figure 11. In this state, the link mechanism 20 is more open than in the state shown in Figure 11. Link 23 swings relative to link 24, and the lower end 23b of link 23 has moved further forward than in the state shown in Figure 11. In the state shown in Figure 12, the distance between the lower end 23b and the lower end 24b is greater than in the state shown in Figure 11. The lower end 23b of link 23 is positioned closer to wearer H's toes when viewed in the X-axis direction. In this state, the lower end 23b is in contact with the floor FL.

[0039] In the squatting position of wearer H shown in Figure 12, wearer H's buttocks are supported by the seat 30. In this state, the longitudinal direction of the arm 32 is positioned along the vertical direction. When viewed in the X-axis direction, wearer H's buttocks may be positioned behind the connection portion 41 between the arm 32 and the seat frame 31. The end portion 31a of the seat frame 31 may be positioned between the thigh and calf when viewed in the X-axis direction.

[0040] In this type of support device 100, when the wearer H lowers their hips, the link mechanism 20 also descends in accordance with the position of the belt 2. After the lower end 24b of the link 24 contacts the floor FL, the distance between the lower end 14b and the belt 2 decreases in the vertical direction, causing the rotational joint 27 to move forward. At this time, the upper end 24a of the link 24 moves forward of the lower end 24b, causing the link 24 to tilt. The rotational joints 27 and 26 move apart in the Y-axis direction, and the rotational joints 25 and 26 move closer together in the Z-axis direction.

[0041] As a result, link 23 rotates around the rotary joint 28, with its upper end 23a moving backward and its lower end 23b moving forward. The link mechanism 20 opens up so that the lower end 23b of link 23 separates from the lower end 24b of link 24.

[0042] In this way, with the support orthosis 100, when the wearer H lowers their hips, the link 24 comes into contact with the floor F, changing the posture of the link mechanism 20. Even if the support orthosis 100 does not have a lever arm on the front of the thigh, the link mechanism 20 can be opened in conjunction with the movement of the wearer H. Since the support orthosis 100 does not require a lever arm, discomfort for the wearer H can be reduced. For example, since the lever arm does not come into contact with the thigh when the wearer H walks, discomfort for the wearer H is reduced.

[0043] Next, we will describe the operation of the support device 100 when the wearer H stands up from a squatting position. When the wearer H changes from a squatting position to a standing position, the support device 100 changes from the state shown in Figure 12 to the state shown in Figure 8, and finally to the state shown in Figure 3.

[0044] As the wearer H attempts to stand up from the squatting position shown in Figure 12, and raises their hips, the lower ends 23b and 24b of links 23 and 24 lift off the floor FL and move upward. The lower ends 23b and 24b move closer to directly below the rotational joint 28 due to gravity. The lower ends 23b and 24b move closer to each other. The upper ends 23a and 24a move closer to each other. Links 23 and 24 rotate around the rotational joint 28 as an axis.

[0045] At this time, the rotary joints 26 and 27 move closer to each other in the Y-axis direction, and the rotary joints 25 and 28 move further apart from each other in the Z-axis direction. As shown in Figure 3, the links 23 and 24 are positioned so as to overlap each other. The lower ends 23b and 24b move closer to each other. In this way, the link mechanism 20 changes to a closed state.

[0046] The seat 30, seat frame 31, and arm 32 rotate around the pivot joint 29 in conjunction with the movement of the wearer H. The end portion 31a moves backward, and the seat frame 31 changes its orientation to align with the Y-axis, as shown in Figure 3. In the standing posture of wearer H shown in Figure 3, the lever arm is not positioned in front of the wearer's thigh.

[0047] In this type of support device 100, the link mechanism 20 activates and returns to the closed position simply by the wearer H standing up. The support device 100 does not have an actuator to drive the link mechanism 20. The support device 100 moves actively in accordance with the wearer H's movements.

[0048] In the support device 100, when the wearer H is in a standing position, most of the link mechanism 20 is positioned so as to overlap the wearer when viewed in the X-axis direction. The lower ends 23b and 24b of links 23 and 24 are located behind the wearer H, but do not come into contact with the wearer H and do not cause discomfort to the wearer H. Although the lower ends 23b and 24b protrude slightly behind the wearer H, the length of the rearward protrusion of the lower ends 23b and 24b is short, so there is little risk of contact with an object behind the wearer H.

[0049] Furthermore, since the support device 100 is equipped with a detachable attachment 10 to the belt 2, the wearer H can easily remove the support device 100 from the belt 2 as needed. The wearer H can also easily reattach the removed support device 100 to the belt 2.

[0050] For example, wearer H, a factory worker, can perform their work while wearing the support brace 100. The support brace 100 supports wearer H's squatting posture, reducing the load on wearer H's waist, thighs, and knees. As a result, wearer H's fatigue and injuries are suppressed. Wearer H is stably supported by the support brace 100.

[0051] The wearer H can easily remove the support device 100, for example, by taking a break. For example, wearer H can quickly remove the support device 100 and go to the toilet. Wearer H can quickly put on the support device 100 as needed. The support device 100 can be put on simply by attaching the clip 11 to the belt from above the belt 2.

[0052] Furthermore, since the attachment 10 is located on the side of the wearer H, the support device 100 can be easily attached and detached.

[0053] (Second Embodiment) Next, the support device 100B according to the second embodiment will be described with reference to Figures 13 and 14. Figure 13 is a side view showing the standing posture of a wearer wearing the support device 100B according to the second embodiment. Figure 14 is a side view showing the squatting posture of a wearer wearing the support device 100B according to the second embodiment. The difference between the support device 100B according to the second embodiment and the support device 100 according to the first embodiment is that it is equipped with a link mechanism 20B instead of the link mechanism 20. Note that in the description of the support device 100B according to the second embodiment, explanations similar to those for the support device 100 of the first embodiment may be omitted.

[0054] The linkage mechanism 20B has links 21, 22, 23B, 24, and rotational joints 25-28. Link 23B of linkage mechanism 20B is shorter than link 23 of linkage mechanism 20. The length of link 23B is the same as the length of link 22. In the squatting position of wearer H, link 23 of linkage mechanism 20 contacts the floor FL, but link 23B of linkage mechanism 20B does not contact the floor FL.

[0055] In the support device 100B according to this second embodiment, when the wearer H lowers their hips and the lower end 24b of the link 24 comes into contact with the floor FL, the link mechanism 20B operates and the state of the link mechanism 20B changes. In the support device 100B, there is no need to provide a lever arm in front of the wearer H's thigh, thus reducing discomfort for the wearer H. The support device 100B according to the second embodiment provides the same effects and advantages as the support device 100 of the first embodiment.

[0056] (Third embodiment) Next, the support device 100C according to the third embodiment will be described with reference to Figures 15 and 16. Figure 15 is a side view showing a wearer in a squatting position wearing the support device 100C according to the third embodiment. Figure 16 is a perspective view showing the link mechanism of the support device 100C according to the third embodiment. The difference between the support device 100C according to the third embodiment and the support device 100 according to the first embodiment is that it is equipped with a link mechanism 50 instead of the link mechanism 20, and further equipped with a link mechanism 60 positioned below the link mechanism 50. Note that in the description of the support device 100C according to the third embodiment, explanations similar to those for the support device 100 of the first embodiment may be omitted.

[0057] The support orthosis 100C comprises an attachment 10, link mechanisms 50, 60, a connecting bar 45, and a seat 30. The link mechanism 50 is, for example, a four-bar link mechanism. The link mechanism 50 has links 51-54 and rotational joints 55-58.

[0058] Link 51 is, for example, plate-shaped. Attachment 10 is attached to link 51. Link 51 has multiple holes. Link 52 is rod-shaped. The upper end of link 52 is connected to link 51 via a rotary joint 55. Link 52 is pivotable relative to link 51.

[0059] Link 53 is rod-shaped. The upper end of link 53 is connected to link 51 via a rotary joint 56. The rotary joint 56 is positioned below the rotary joint 55. The rotary joints 55 and 56 are spaced apart in the Z-axis direction. Link 53 is pivotable relative to link 51.

[0060] Link 54 is rod-shaped. The upper end of link 54 is connected to the lower end of link 52 via a rotary joint 57. The rotary joint 57 is located below and in front of the rotary joint 55. The rotary joints 55 and 57 are spaced apart in the longitudinal direction of link 52. Link 54 is pivotable relative to link 52.

[0061] The lower end of link 54 is connected to the lower end of link 53 via a rotary joint 58. The rotary joints 56 and 57 are spaced apart in the longitudinal direction of link 53. The rotary joints 57 and 58 are spaced apart in the longitudinal direction of link 54.

[0062] A rod-shaped link 59 is connected to the rotary joint 58. The upper end of link 59 is connected to the lower end of link 53 and the lower end of link 54 via the rotary joint 58. A seat 30 is connected to link 59. The seat 30 is pivotably supported relative to link 59. The seat 30 is pivotable about a rotation axis that extends in the X-axis direction.

[0063] The connecting bar 45 connects the link mechanism 50 and the link mechanism 60. The upper end of the connecting bar 45 is connected to the lower end of the link 59.

[0064] As shown in Figure 16, the link mechanism 60 comprises a bar 61, a mounting piece 62, and links 63 and 64. Link 64 is an example of a first link, and link 63 is an example of a second link. The bar 61 extends in the Z-axis direction. The upper end of the bar 61 is fixed to the lower end of the connecting bar 45. The connecting bar 45 and the bar 61 may be formed as a single rod-shaped member. The cross-sectional shape of the connecting bar 45 is, for example, rectangular.

[0065] The mounting piece 62 is plate-shaped and fixed to the side of the connecting bar 45. The thickness direction of the mounting piece 62 is along the X-axis direction. The mounting piece 62 is fixed to the connecting bar 45, for example, using multiple bolts. The mounting piece 62 has overhangs 65 and 66 that extend outward from the bar 61 in the Y-axis direction. The overhangs 65 and 66 extend in opposite directions to each other in the Y-axis direction. For example, the overhang 65 extends forward, and the overhang 66 extends backward.

[0066] Link 63 is rod-shaped. The upper end 63a of link 63 is supported by the protruding portion 65 of the mounting piece 62 via a rotary joint 67. The rotary joint 67 has a rotation axis extending in the X-axis direction. Link 63 is pivotable around the rotation axis of the rotary joint 67.

[0067] A stopper 71 is provided on the protruding portion 65 of the mounting piece 62 to restrict the movement of the link 63. The stopper 71 defines the maximum inclination angle of the link 63. The stopper 71 is located above and in front of the rotary joint 67. The link 63 swings relative to the mounting piece 62 via the rotary joint 67, and when the link 63 hits the stopper 71, the range of movement of the link 63 is restricted. The stopper 71 may also be a bolt fixed to the protruding portion 65.

[0068] A roller 73 is rotatably supported at the lower end 63b of the link 63. The roller 73 is an example of a second roller. The roller 73 is rotatable about a rotation axis that extends in the X-axis direction. For example, the roller 73 rotates in contact with the floor FL. When the roller 73 is in contact with the floor FL, the lower end 63b of the link 63 is considered to be in contact with the floor FL. The lower end 63b of the link 63 may be in direct contact with the floor FL, or it may be in contact via the roller 73.

[0069] Link 64 is rod-shaped. The upper end 64a of link 64 is supported by the protruding portion 65 of the mounting piece 62 via a rotary joint 68. The rotary joint 68 is spaced apart from the rotary joint 67 in the Y-axis direction. The rotary joint 68 is located below and behind the rotary joint 67. The rotary joint 68 has a rotation axis extending in the X-axis direction. Link 64 is pivotable around the rotation axis of the rotary joint 68. The length of link 64 is shorter than the length of link 63. The lower end 63b of link 63 is located below the lower end 64b of link 64.

[0070] A stopper 72 is provided on the protruding portion 66 of the mounting piece 62 to restrict the movement of the link 64. The stopper 72 defines the maximum inclination angle of the link 64. The stopper 72 is located above and behind the rotary joint 68. The link 64 swings relative to the mounting piece 62 via the rotary joint 67, and when the link 64 hits the stopper 72, the range of movement of the link 64 is restricted. The stopper 72 may also be a bolt fixed to the protruding portion 66.

[0071] A roller 74 is rotatably supported at the lower end 64b of the link 64. The roller 74 is an example of a first roller. The roller 74 is rotatable about a rotation axis that extends in the X-axis direction. For example, the roller 74 rotates in contact with the floor FL. When the roller 74 is in contact with the floor FL, the lower end 64b of the link 64 is considered to be in contact with the floor FL. The lower end 64b of the link 64 may be in direct contact with the floor FL or in contact via the roller 74.

[0072] A projection 75 is provided at the upper end 63a of link 63. The projection 75 is an example of a second engaging piece. The projection 75 protrudes toward the upper end 64a of link 64 in the Y-axis direction. A bearing cam 76 is provided at the tip of the projection 75. The bearing cam 76 has a roller that is rotatable around a rotation axis that extends in the X-axis direction.

[0073] A projection 77 is provided at the upper end 64a of link 64. The projection 77 is an example of a first engaging piece. The projection 77 protrudes toward link 63 in the Y-axis direction. The projection 77 is located below projection 75. When projection 75 moves downward, the bearing cam 76 comes into contact with projection 77 and pushes projection 77 downward. As a result, link 64 swings around the rotation axis of the rotary joint 68.

[0074] Next, the movement of the link mechanism 60 will be explained. As shown in Figure 16, the state in which the lower ends 63b and 64b of links 63 and 64 are close to each other is considered the closed state of the link mechanism 60. As shown in Figure 15, the state in which the lower ends 63b and 64b of links 63 and 64 are separated is considered the open state of the link mechanism 60.

[0075] When wearer H is standing, the link mechanism 60 is in a closed state as shown in Figure 16. When wearer H sits down from this state, the roller 73 provided on the lower end 63b of link 63 comes into contact with the floor FL. When the roller 73 comes into contact with the floor FL, the lower end 63b of link 63 slides along the floor FL. The lower end 63b of link 63 moves away from the lower end 64b of link 64. At this time, link 63 swings around the pivot joint 67 as its axis. In conjunction with this, the protrusion 75 moves downward, and the bearing cam 76 that contacts the protrusion 77 pushes the protrusion 77 down.

[0076] When the protrusion 77 is pushed down, link 64 swings around the rotation axis of the rotary joint 68 in conjunction with the movement of the protrusion 77. The lower end 64b of link 64 moves away from the lower end 63b of link 63. Also, when the roller 74 provided on the lower end 64b of link 64 comes into contact with the floor FL, the lower end 64b can move away from the lower end 63b. If the wearer H lowers their hips further, the distance between the lower ends 63b and 64b in the Y-axis direction increases.

[0077] When the wearer is in a crouching position, as shown in Figure 15, the distance between the lower ends 63b and 64b is maximized, and the movement of links 63 and 64 stops. In this state, link 63 contacts stopper 71, and link 64 contacts stopper 72. The lower ends 63b and 64b are furthest from the bar 61 in the Y-axis direction.

[0078] When the wearer H stands up from a squatting position, the rollers 73 and 74 move away from the floor FL, and gravity causes the lower ends 63b and 64b of the links 63 and 64 to move closer to each other. In the wearer H's standing position, as shown in Figure 16, the lower ends 63b and 64b are closest together, and the link mechanism 60 is in a closed state.

[0079] In this third embodiment of the support brace 100C, the state of the link mechanism 60 changes in conjunction with the movement of the wearer H. Therefore, even in a configuration that does not have a lever arm on the front of the wearer H's thigh as in the previous model, the link mechanism 60 can be operated. The support brace 100C according to the third embodiment provides the same effects as the support brace 100 of the first embodiment.

[0080] With the support device 100C, the wearer H can be stably supported via the sheet 30 when the wearer H is in a squatting position. With the support device 100C, when the wearer H is in a standing position, the link mechanism 60 is in a closed state and does not protrude significantly behind the wearer H. Therefore, there is a low risk of the link mechanism 60 hitting an object located behind the wearer H.

[0081] In the description of the support device 100C of the third embodiment, the case in which link 64 is positioned behind link 63 is given as an example, but link 64 may also be positioned in front of link 63. The shorter link 64 may be provided at the front, and the longer link 63 may be provided at the rear. The lengths of links 63 and 64 may be different or the same.

[0082] (Fourth Embodiment) Next, the support orthosis 100D according to the fourth embodiment will be described with reference to Figures 17 and 18. Figure 17 is a partial cross-sectional side view showing the support orthosis 100D according to the fourth embodiment in a closed state. Figure 18 is a side view showing the support orthosis 100D according to the fourth embodiment in an open state. The difference between the support orthosis 100D according to the fourth embodiment and the support orthosis 100 of the first embodiment is that it is equipped with a link mechanism 80 instead of a link mechanism 20. Note that in the description of the support orthosis 100D according to the fourth embodiment, explanations similar to those for the support orthosis 100 of the first embodiment may be omitted.

[0083] The support orthosis 100D includes a linkage mechanism 80. The linkage mechanism 80 has an input link 81, an output link 82, a frame link 83, and a rotary joint 85. The frame link 83 is an example of a holder. The input link 81 is rod-shaped. The input link 81 has a slot hole 84 that extends in the longitudinal direction of the input link 81. The slot hole 84 penetrates the input link 81 in the X-axis direction. The lower end 81b of the input link 81 includes a portion that can contact the floor FL. The lower end 81b of the input link 81 protrudes downward from the frame link 83.

[0084] An inclined surface 81c is formed on the upper end portion 81a of the input link 81. The inclined surface 81c is inclined with respect to a plane perpendicular to the longitudinal direction of the input link 81. When the longitudinal direction of the input link 81 is along the Z-axis direction, the plane perpendicular to the longitudinal direction of the input link 81 is along the XY plane. In this case, the inclined surface 81c is inclined with respect to the XY plane.

[0085] The rotation axis of the rotary joint 85 is inserted through the slot hole 84. The rotation axis of the rotary joint 85 extends in the X-axis direction. The rotation axis of the rotary joint 85 may be, for example, a pin or a bolt shaft.

[0086] The output link 82 is rod-shaped. The output link 82 is supported via a rotary joint 85 so as to be able to swing relative to the input link 81. As shown in Figure 17, when the link mechanism 80 is closed, the output link 82 is positioned along the input link 81. As shown in Figure 18, when the link mechanism 80 is open, the output link 82 is positioned to intersect the input link 81.

[0087] The upper end portion 82a of the output link 82 is provided with a top plate 86 that can contact the inclined surface 81c of the input link 81. In the state shown in Figure 17, the thickness direction of the top plate 86 is aligned with the longitudinal direction of the input link 81.

[0088] The frame link 83 is an example of a holder for holding the input link 81. The input link 81 is movable relative to the frame link 83 in the longitudinal direction of the frame link 83. The frame link 83 may be provided with a guide that defines the direction of movement of the input link 81. The direction of movement of the input link 81 is also defined by the fact that the rotation axis of the rotary joint 85 is inserted through the slot hole 84 of the input link 81.

[0089] An opening 83c is formed at the lower end 83b of the frame link 83. The portion of the input link 81 closest to the lower end 81b is inserted through the opening 83c. The lower end 82b of the input link 81 is located outside the frame link 83. The lower end 82b of the input link 81 is movable relative to the frame link 83 so as to move closer to or further away from the lower end 83b of the frame link 83.

[0090] An opening is formed in the upper end 83a of the frame link 83. When the input link 81 is pushed from below, the input link 81 moves upward. The upper end 81a of the input link 81 protrudes above the upper end 83a of the frame link 83, as shown in Figure 18.

[0091] The axis of rotation of the rotary joint 85 is supported, for example, by a frame link 83. The axis of rotation of the rotary joint 85 may also be fixed to an output link 82 and rotate around the axis in conjunction with the movement of the output link 82.

[0092] Next, the movement of the link mechanism 80 will be described. The link mechanism 80 can change from the closed state shown in Figure 17 to the open state shown in Figure 18. The link mechanism 80 can change from the open state shown in Figure 18 to the closed state shown in Figure 17.

[0093] As the frame link 83 approaches the floor FL from the state shown in Figure 17, the lower end 81b of the input link 81 comes into contact with the floor FL. As the frame link 83 approaches the floor FL further, the lower end 81b approaches the lower end 83b of the frame link 83. At this time, the input link 81 moves relative to the frame link 83.

[0094] When the lower end 81b of the input link 81 approaches the lower end 83b of the frame link 83, the upper end 81a of the input link 81 protrudes outward from the upper end 83a of the frame link 83.

[0095] As the upper end 81a of the input link 81 protrudes outside the frame link 83, the inclined surface 81c contacts the top plate 86 of the output link 82. As a result, the top plate 86 is pushed by the inclined surface 81c and rotates around the rotation axis of the rotary joint 85. As the top plate 86 of the output link 82 is pushed, the output link 82 swings around the rotation axis of the rotary joint 85, as shown in Figure 18. The lower end 82b of the output link 82 moves away from the lower end 81b of the input link 81. When viewed from the X-axis direction, the output link 82 is positioned to intersect with the input link 81. In this way, the link mechanism 80 is in an open state.

[0096] As the frame link 83 moves away from the floor FL from the state shown in Figure 18, the lower end 83b of the frame link 83 moves upward and separates from the lower end 81b of the input link 81. At this time, as the upper end 83a of the frame link 83 moves upward, the inclined surface 81c of the input link 81 is housed within the frame link 83. As a result, the force pressing the top plate 86 of the output link 82 is weakened, and gravity causes the lower end 82b of the output link 82 to move toward the lower end 81b of the input link 81. Finally, as shown in Figure 17, the input link 81 and the output link 82 are positioned to overlap. In this way, the link mechanism 80 is in a closed state.

[0097] In this fourth embodiment of the support device 100D, the state of the link mechanism 80 changes in conjunction with the movement of the wearer H. Therefore, even if the device does not have a lever arm on the front of the wearer H's thigh, the link mechanism 80 can still be operated. The support device 100D according to the fourth embodiment provides the same effects and advantages as the support device 100 of the first embodiment.

[0098] In the support device 100D, the seat 30 can be pivotably connected to the frame link 83. The seat 30 may also be connected to the frame link 83 via other connecting members. The frame link 83 can be attached to the belt 2 via the attachment 10, similar to the support device 100. The support device 100D may also be equipped with other linking mechanisms. For example, the support device 100D may be equipped with a four-bar linkage mechanism connected to the frame link 83. In the support device 100D, the frame link 83 may be tilted with respect to the Z-axis direction using the four-bar linkage mechanism.

[0099] (Fifth embodiment) Next, the support device 100G according to the fifth embodiment will be described with reference to Figures 19 to 23. Figure 19 is a side view showing the support device 100G according to the fifth embodiment. Figure 20 is a side view showing the standing posture of wearer H wearing the support device 100G according to the fifth embodiment. Figures 21 and 22 are side views showing the standing posture of wearer H wearing the support device 100G according to the fifth embodiment. Figure 23 is a rear view showing the squatting posture of wearer H wearing the support device 100G according to the fifth embodiment. The difference between the support device 100G according to the fifth embodiment and the support device 100 of the first embodiment is that it is equipped with a link mechanism 160 instead of a link mechanism 20. Note that in the description of the support device 100G according to the fifth embodiment, explanations similar to those for the support device 100 of the first embodiment may be omitted.

[0100] The support device 100G includes a linkage mechanism 160. The linkage mechanism 160 has a connecting piece 161, a mounting piece 162, links 163, 164, and a rotary joint 165. Link 163 is an example of a first link, and link 164 is an example of a second link. The connecting piece 161 is connected to the attachment 10. The connecting piece 161 is attached to the belt 2 via the attachment 10. In the standing position of the wearer H shown in Figure 19, the belt 2 is positioned along the Y-axis, and the connecting piece 161 is positioned along the Z-axis. The connecting piece 161 extends away from the attachment 10. The connecting piece 161 is, for example, plate-shaped and has a predetermined length. The connecting piece 161 may be, for example, spring steel.

[0101] The mounting piece 162 is fixed to the lower end of the connecting piece 161. The lower end of the connecting piece 161 is the end furthest from the attachment 10 in the longitudinal direction of the connecting piece 161. The mounting piece 162 may be positioned so as to intersect the longitudinal direction of the connecting piece 161 when viewed from the X-axis direction. The mounting piece 162 may protrude forward or backward from the connecting piece 161. The mounting piece 162 may be formed integrally with the connecting piece 161, or it may be formed separately from the connecting piece 161.

[0102] Link 163 is, for example, a rod-shaped member. The upper end 163a of link 163 is connected to the mounting piece 162 via a rotary joint 165. The rotary joint 165 has a rotation axis extending in the X-axis direction. Link 163 is pivotable relative to the mounting piece 162 about the rotation axis of the rotary joint 165. The lower end 163b of link 163 can contact the floor FL in the squatting position of the wearer H shown in Figures 21 and 22.

[0103] The lower end 163b of link 163 may be formed to be curved when viewed from the X-axis direction. The lower end 163b of link 163 is curved away from the lower end 164b of link 164.

[0104] Link 164 is, for example, a rod-shaped member. The upper end 164a of link 164 is fixed to the mounting piece 162. Link 164 is positioned behind link 163. Link 164 is positioned closer to the seat 30 than link 163. Link 164 is attached to the mounting piece 162, for example, using multiple bolts.

[0105] Link 164 is positioned behind link 163. The upper end 164a of link 164 is fixed to the mounting piece 162 at a position behind the upper end 163a of link 163. Link 164 does not swing relative to the connecting piece 161 and the mounting piece 162. Link 164 extends along the longitudinal direction of the connecting piece 161. Link 164 extends in the opposite direction to the connecting piece 161 relative to the mounting piece 162.

[0106] The longitudinal length of link 164 may be longer than the longitudinal length of link 163. In the configuration shown in Figure 19, the lower end 164b of link 164 may be positioned below the lower end 163b of link 163.

[0107] A projection 171 is provided at the upper end 163a of link 163. The projection 171 protrudes toward the upper end 164a of link 164 in a direction intersecting the longitudinal direction of link 163. The projection 171 is pivotable as an integral part of link 163.

[0108] A projection 172 is provided at the upper end 164a of link 164. The projection 172 protrudes toward the upper end 163a of link 163 in a direction intersecting the longitudinal direction of link 164. The projection 172 is spaced apart from projection 171 in the longitudinal direction of link 164. The projection 172 functions as a stopper that restricts the movement of link 163. The projection 172 is positioned so as to be able to contact projection 171.

[0109] In the state shown in Figure 19, the protrusions 171 and 172 are spaced apart from each other in the Z-axis direction. In this state, the protrusions 171 and 172 are not in contact. In the state shown in Figure 20, the protrusions 171 and 172 are closer together than in the state shown in Figure 19, but are not in contact. In the state shown in Figure 22, the protrusions 171 and 172 are in contact with each other. In this state, since protrusion 171 is in contact with protrusion 172, the downward movement of protrusion 171 is restricted. In other words, the maximum distance between the lower end 163b of link 163 and the lower end 164b of link 164 in the Y-axis direction is restricted.

[0110] Next, the movement of the link mechanism 160 will be explained. As shown in Figures 19 and 20, the state in which the lower ends 163b and 164b of links 163 and 164 are close to each other is considered the closed state of the link mechanism 160. As shown in Figures 21 and 22, the state in which the lower ends 163b and 164b of links 163 and 164 are separated is considered the open state of the link mechanism 160.

[0111] The link mechanism 160 can change from the closed state shown in Figures 19 and 21 to the open state shown in Figures 21 and 22. The link mechanism 160 can change from the closed state shown in Figures 21 and 22 to the state shown in Figures 19 and 20.

[0112] As shown in Figure 20, when wearer H is standing, the link mechanism 160 is in a closed state. When wearer H lowers his hips from this state, the lower end 164b of the link 164 comes into contact with the floor FL. When wearer H squats, as shown in Figure 21, his upper body tilts forward, and the belt 2, connecting piece 161, mounting piece 162, and link 164 also tilt in conjunction with the movement of the upper body. The upper end 164a of the link 164 is positioned in front of the lower end 116b.

[0113] Since link 163 is pivotable relative to mounting piece 162, it tilts relative to mounting piece 162. The lower end 163b of link 163 contacts the floor FL, allowing it to support a portion of the wearer H's weight. In this state, if wearer H lowers their hips further, the distance between the floor FL and mounting piece 162 decreases, and the lower end 163b of link 163 slides forward along the floor FL.

[0114] As shown in Figure 22, when the projection 171 protruding from link 163 comes into contact with the projection 172 protruding from link 164, the relative swing of link 163 with respect to the mounting piece 162 stops. In the squatting position shown in Figure 22, the buttocks of the wearer H are supported by the seat 30. Part of the wearer H's weight can be supported by links 163 and 164.

[0115] In the squatting position of wearer H, as shown in Figure 23, wearer H's buttocks are supported by the seat 30. The connecting piece 161 is also inclined such that, when viewed from the Y-axis direction, its lower end is positioned further outward than its upper end. The upper end of the connecting piece 161 is connected to the belt 2 via the attachment 10. The seat 30 is connected to the lower end of the connecting piece 161 via the mounting piece 162. In the X-axis direction, the lower end of the connecting piece 161 is positioned further outward than its upper end. The lower end of the connecting piece 161 is displaceable in the Y-axis direction relative to the attachment 10. The connecting piece 161 can change its posture according to the width of wearer H along the Y-axis direction.

[0116] As shown in Figures 22 and 23, when the wearer H raises their hips from a squatting position, the lower ends 163b and 164b of links 163 and 164 lift off the floor FL. As the lower ends 163b and 164b lift off the floor FL, gravity causes link 163 to swing relative to the mounting piece 162, and the lower end 163b of link 163 approaches the lower end 164b of link 164. Link 164 changes its position in conjunction with the wearer H's movement.

[0117] As shown in Figure 20, when the wearer H takes a standing position, the link mechanism 160 closes, and the lower ends 163b and 164b of the links 163 and 164 move closer together.

[0118] In this seventh embodiment of the support device 100G, the state of the link mechanism 160 changes in conjunction with the movement of the wearer H. Therefore, even if the device does not have a lever arm on the front of the wearer H's thigh, the link mechanism 160 can be operated. The support device 100G according to the seventh embodiment provides the same effects and advantages as the support device 100 of the first embodiment.

[0119] In the support device 100G, the distance between the lower ends 163b and 164b of links 163 and 164 is determined by the contact between the protrusion 171 extending from link 163 and the protrusion 172 extending from link 164. Therefore, the distance between the lower ends 163b and 164b of links 163 and 164 is determined by appropriately setting the length, shape, and position of the protrusions 171 and 172. For example, by setting the length, shape, and position of the protrusion 171 to resemble the squatting posture of a skilled worker, other workers can easily imitate the squatting posture of a skilled worker. A skilled worker may be, for example, a welder, a grinder, or any other type of worker. In the squatting posture of wearer H shown in Figure 22, wearer H's heel may be touching the floor FL between the lower end 163b and the lower end 164b.

[0120] (Sixth Embodiment) Figure 24 is a side view of the support orthosis 100H according to the sixth embodiment, showing the state corresponding to the wearer's standing posture. Figure 25 is a side view showing the squatting posture of the wearer wearing the support orthosis 100H according to the sixth embodiment. Figures 24 and 25 show the prototype support orthosis 100H, and Figures 13 and 14 show the visualized support orthosis 100B. The support orthosis 100H is a concrete embodiment of the support orthosis 100B. The support orthosis 100H according to the eighth embodiment has almost the same configuration as the support orthosis 100B according to the second embodiment. The support orthosis 100H operates in the same way as the support orthosis 100B. The support orthosis 100H provides the same effects as the support orthoses 100 and 100B.

[0121] (Reference form) Next, the support device 200 according to the reference configuration will be described with reference to Figures 26 and 27. Figure 26 is a side view showing the standing posture of wearer H wearing the support device 200 according to the reference configuration. Figure 27 is a side view showing the squatting posture of wearer H wearing the support device 200 according to the reference configuration.

[0122] The support device 200 comprises a belt 2, an attachment 10, and a support leg 201. The support leg 201 is attached to the belt 2 via the attachment 10. The support leg 201 is a rod-shaped member. For example, the support device 200 may also be configured to include a seat 30 connected to the support leg 201.

[0123] In the standing position of wearer H shown in Figure 26, the support leg 201 extends along the thigh of wearer H in the X-axis direction. In the state shown in Figure 26, the support leg 201 is not in contact with the floor FL. In the squatting position of wearer H shown in Figure 27, the support leg 201 is in contact with the floor FL and can support a portion of wearer H's weight.

[0124] In the support device 200, the support leg 201 is positioned along the thigh when the wearer H is standing, so the support leg 201 does not protrude in front of or behind the wearer H. Therefore, the risk of the support leg 201 coming into contact with an object behind the wearer H when the wearer H is standing is reduced.

[0125] With the support brace 200, the support leg 201 can support a portion of the wearer H's weight when the wearer is in a squatting position, thus reducing the burden on the wearer H's waist, thighs, and knees. This reduces the wearer's fatigue. Because the support brace 200 supports the wearer H's squatting position, the wearer H can more easily maintain a stable squatting position.

[0126] (Conventional technology) Next, with reference to Figures 28 and 29, a conventional support device 300 will be described. Figure 28 is a side view showing a wearer being supported by the conventional support device 300. Figure 29 is a side view showing a wearer standing with the conventional support device 300 attached.

[0127] The support device 300 comprises a belt 301, a pad 302, and a support leg 303. The belt 301 is wrapped around the wearer H's thigh. The pad 302 is positioned to cover the back of the wearer H's thigh. In the seated position of the wearer H shown in Figure 28, the wearer H's thigh is positioned on the pad 302.

[0128] The support leg 303 is, for example, a rod-shaped member and has a first portion 304 and a second portion 305. The first portion 304 supports the pad 302. The belt 301 is connected to the first portion 304. The first portion 304 is positioned along the thigh of the wearer H.

[0129] The second part 305 is bent from the first part 304. In the seated position of the wearer H, the second part 305 can contact the floor FL and support a portion of the wearer H's weight. In the standing position of the wearer H shown in Figure 29, the second part 305 protrudes behind the thigh. In this state, the lower end 303b of the support may strike an object Ob located behind the wearer H. Therefore, the wearer H's range of motion is restricted.

[0130] On the other hand, as described above, in the support device 100 according to the embodiment, when the wearer H is standing, the links 21 to 24 are positioned along the wearer's thigh. Compared to the conventional support device 300, the support device 100 has a shorter length of the portion that protrudes behind the wearer H, so the possibility of the support device 100 coming into contact with the object Ob is low.

[0131] Preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described above. Various modifications, substitutions, etc., can be applied to the embodiments described above without departing from the scope of the present invention. Furthermore, features described separately can be combined as long as no technical inconsistencies arise.

[0132] This application claims priority based on U.S. Provisional Applications 63 / 148,798, 63 / 148,804, and 63 / 148,811, filed on 12 February 2021, the entire contents of these U.S. Provisional Applications are incorporated herein by reference. [Explanation of symbols]

[0133] 100, 100B, 100C, 100D, 100G, 100H... Support brace, 2... Belt (wearable item), 10... Attachment (mounting part), 20, 20B... Link mechanism (4-bar link mechanism), 21... Link (1st link), 22, 23B... Link (2nd link), 23... Link (3rd link), 23b... Lower end (lower end of 3rd link), 24... Link (4th link), 24b... Lower end (4th 30...Seat, 31...Seat frame, 32...Arm, 33...Bar (1st bar), 34...Bar (2nd bar), 35...Hole (1st holding part), 36...Hole (2nd holding part), 50...Link mechanism, 60...Link mechanism, 80...Link mechanism, 81...Input link, 160...Link mechanism, 161...Connecting piece, 163...Link (1st link), 164...Link (2nd link), FL...Floor.

Claims

1. An attachment part that is attached to the wearer's clothing, A link mechanism connected to the aforementioned mounting portion, which changes to a first state in response to the wearer's squatting motion by receiving the wearer's weight, and changes to a second state in response to the wearer's standing motion, The link mechanism comprises a seat connected to the link mechanism, The link mechanism has a link member that contacts the floor in response to the wearer's squatting motion, changes its state under the wearer's weight, and separates from the floor in response to the wearer's standing motion. The aforementioned link member is positioned to the side of the wearer's thigh when the wearer is standing. The aforementioned link mechanism is a four-bar link mechanism, A first link connected to the aforementioned mounting portion, A second link connected to the first link and capable of swinging relative to the first link, A third link is connected to the first link at a different position from the second link and is swingable relative to the first link, It has a fourth link which is connected to the second link and the third link at different positions and which is swingable relative to the second link and the third link, The link member includes the fourth link, The link member further includes the third link, In the second state, the lower end of the third link and the lower end of the fourth link are arranged to be close to each other. In the first state, the lower end of the third link and the lower end of the fourth link are arranged to be spaced apart from each other. An arm connected to the third link and capable of swinging relative to the third link, A seat frame connected to the aforementioned arm, A first bar, which is held by the seat frame and holds the front end of the seat, The seat frame further comprises a second bar that is held by the seat frame and holds the rear end of the seat, The seat frame has a first holding portion for holding the first bar and a second holding portion for holding the second bar. In the first state, the support device is positioned such that, when viewed from the side of the wearer, the connection between the third link and the arm is located closer to the first retaining portion than to the second retaining portion.

2. An attachment part that is attached to the wearer's clothing, A link mechanism connected to the aforementioned mounting portion, which changes to a first state in response to the wearer's squatting motion by receiving the wearer's weight, and changes to a second state in response to the wearer's standing motion, The link mechanism comprises a seat connected to the link mechanism, The link mechanism has a link member that contacts the floor in response to the wearer's squatting motion, changes its state under the wearer's weight, and separates from the floor in response to the wearer's standing motion. The aforementioned link member is positioned to the side of the wearer's thigh when the wearer is standing. The aforementioned link mechanism is A holder connected to the aforementioned mounting portion and extending in a direction away from the aforementioned mounting portion, An input link held in the holder and movable relative to the holder in the longitudinal direction of the holder, The system comprises an output link that swings relative to the input link and is positioned to tilt relative to the input link, in conjunction with the relative movement of the holder and the input link, The link member is the input link of the support device.

3. An attachment part that is attached to the wearer's clothing, A link mechanism connected to the aforementioned mounting portion, which changes to a first state in response to the wearer's squatting motion by receiving the wearer's weight, and changes to a second state in response to the wearer's standing motion, The link mechanism comprises a seat connected to the link mechanism, The link mechanism has a link member that contacts the floor in response to the wearer's squatting motion, changes its state under the wearer's weight, and separates from the floor in response to the wearer's standing motion. The aforementioned link member is positioned to the side of the wearer's thigh when the wearer is standing. The aforementioned link mechanism is A connecting piece connected to the mounting portion and extending in a direction away from the mounting portion, A first link connected to the aforementioned connecting piece and capable of swinging relative to the aforementioned connecting piece, A second link is connected to the connecting piece and is capable of swinging relative to the connecting piece in the opposite direction to the first link, A first engaging piece that protrudes from the first link toward the second link and swings together with the first link, The device comprises a second engaging piece that protrudes from the second link toward the first link and swings together with the second link, The link member includes the first link and the second link, The aforementioned link mechanism is A bearing cam rotatably supported by the second engaging piece and in contact with the first engaging piece, A first roller provided at the lower end of the first link, A support device further comprising a second roller provided at the lower end of the second link.

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