JP2012254237A - Lumbar brace of walking assist device, and walking assist device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lumbar brace for a walking assist device, which sufficiently receives reaction force of power generated by a power generating means, which is the generation source of walking assist power, without disturbing wearing property for a user.SOLUTION: There are provided right and left stabilizer members 80 and 90 for connecting right and left tip end parts 22B and 22C of a main frame 22 and a middle part of an abdominal belt 30. For the stabilizer members 80 and 90, connection members 82 and 92 forming a connection part with the main frame 22, support members 84 and 94 supporting left and right belts 36 and 38, and flexible connection members 86 and 96 forming a planar connection part that connects the connection members 82 and 92 and the support members 84 and 94 are configured of different components.

Description

  The present invention relates to a lumbar orthosis and a walking assist device of a walking assist device, and more specifically, a lumbar orthosis of a walking assist device that applies power generated by a power generating device as a walking assist force to a user's lower limb, and the lumbar orthosis thereof. The present invention relates to a walking assist device using the.

  It has a power generation device using an electric motor etc. for walking assistance and walking rehabilitation for people with weak muscles in the lower limbs, and the power generated by the power generation device is used as walking assistance force (walking assist force) to the user's lower limbs A walking assist device to be provided has been proposed (for example, Patent Documents 1 and 2).

  This type of walking assistance device has a substantially C-shaped lumbar frame (main frame) and a lumbar frame that are attached to the user's lower back and extend from the user's lower back to the left and right hip sides of the user. It has a waist orthosis consisting of an abdominal belt for attaching to the lower back of the body, and left and right power generators are attached to the left and right tip portions of the waist frame, and the power generated by the power generator is walked to the user's lower limbs It is given as auxiliary power.

JP 2006-320351 A JP 2008-134086 A

  The waist orthosis is for attaching power generation means, which is a source of walking assist force, to the user's waist, and the power (torque) generated by the power generation means when attached to the user's waist. Reaction force, particularly the reaction force around the forehead axis of the waist frame, and a good fit to the user's body and no discomfort to the user.

  On the other hand, the conventional waist orthosis cannot sufficiently satisfy the above-described requirements. In particular, the conventional lumbar orthosis has a low ability to prevent the rotation of the lumbar frame around the forehead axis when it is worn on the user's lumbar region. The waist frame rotates around the forehead axis, leaving the problem that the reaction force cannot be sufficiently received.

  The problem to be solved by the present invention is to prevent the user from wearing a reaction force of the power generated by the power generation means, which is a generation source of the walking assist force, as a waist orthosis for the walking assist device. Not to be able to do it enough.

  The lumbar orthosis of the walking assist device according to the present invention is a lumbar orthosis of the walking assist device that applies the power generated by the power generation device (26, 28) to the lower limbs of the user as a walking assist force. A main frame (22) that is arranged and has a substantially C-shape extending outward from the waist and back to the left and right waist sides, and the power generator can be attached to the left and right tip portions; and the main frame (22) An abdominal belt (30) that is more inside and connected to the main frame (22) and wound around the user's abdomen, one end connected to the left and right tip portions of the main frame (22), and the other end Left and right stabilizer members (80, 90) supporting intermediate portions of the abdominal belt (30) at the portion, and the stabilizer members (80, 90) are connected to the main frame (22). (82, 92), a support part (84, 94) of the abdomen belt (30), a plate-like connection part (84, 94) connecting the connection part (82, 92) and the support part (84, 94). 86, 96) are constituted by separate parts, the connecting portions (82, 92) and the supporting portions (84, 94) are constituted by a high rigidity material, and the connection portions (86, 96) are constituted by a low rigidity material. The connection portions (86, 96) are configured to have a plate shape with a thickness in the front-rear direction, so that the rigidity in the vertical direction is high and the rigidity in the front-rear direction is lower than that in the vertical direction.

  According to this configuration, the stabilizer members (80, 90) are highly rigid in the vertical direction and flexible in the front-rear direction, so that the reaction force during driving of the power generation device (26, 28) is reduced. The handling is performed by the stabilizer members (80, 90) in addition to the main frame (22), and the reaction force handling is reliably performed without causing the movement of the main frame (22). Since the stabilizer member (80, 90) is composed of the connecting portion (82, 92), the supporting portion (84, 94), and the connecting portion (86, 96) as separate parts, the properties of the respective portions are defined. Highly compatible with required specifications.

  In the waist orthosis of the walking assistance device according to the present invention, preferably, the connecting portions (86, 96) are constituted by a woven fabric belt formed by stitching a plurality of woven fabrics (88, 98).

  According to this configuration, the connecting portion (86, 96) exhibits high rigidity in the vertical direction, and the use of a flexible material such as a woven fabric (88, 98) significantly improves the fitting property for the user.

  In the waist orthosis of the walking assistance device according to the present invention, preferably, the connecting portions (82, 92) and the supporting portions (84, 94) are made of a hard synthetic resin.

  According to this configuration, the mechanical strength is accurately ensured in the connection portions (82, 92) and the support portions (84, 94) as necessary, and high durability is obtained.

  The waist orthosis of the walking assistance device according to the present invention is preferably configured such that the connection portions (82, 92) and the connection portions (86, 96) are connected, and the support portions (84, 94) and the connection portions (86). , 96) are respectively connected by fasteners (100).

  According to this configuration, the connection members (86, 96) can be removed and replaced from the coupling members (82, 92) and the support members (84, 94), and the recombination property of the parts is improved.

  The walking assist device according to the present invention includes the waist orthosis according to the above-described invention.

  According to the lower back orthosis of the walking assistance device according to the present invention, the stabilizer member is highly rigid in the vertical direction and flexible in the front-rear direction, and is responsible for the reaction force when driving the power generation device, In addition to the main frame, it is performed by a stabilizer member, and reaction force handling is reliably performed without causing movement of the main frame (22). In the stabilizer member, the connecting portion, the supporting portion, and the connecting portion are configured as separate parts, so that the properties of each portion can be highly adapted to the required specifications.

The perspective view which shows one Embodiment of the walk assistance apparatus by this invention, and a waist orthosis. The top view which shows the walk assistance apparatus by this embodiment, and a waist | hip | lumbar part orthosis (state which removed the swing arm). The perspective view of the abdominal part belt of the waist orthosis by this embodiment. The disassembled perspective view of the stabilizer member of the waist orthosis by this embodiment.

  Below, one Example of the walking assistance apparatus by this invention and a waist orthosis is described with reference to FIGS. In the following description, the direction of the walking assist device will be described based on the directions shown in the drawings. When the walking assist device is worn by the user, the front-rear direction thereof coincides with the sagittal axis of the user, and the left-right direction thereof coincides with the forehead axis of the user.

  The walking assist device 10 has a waist orthosis 20. As shown in FIGS. 1 and 2, the waist orthosis 20 is arranged on the user's waist and extends outward and forward from the waist back to the left and right waist sides, and is substantially C-shaped in plan view. A main frame (waist frame) 22 having a shape is included. The main frame 22 is a plastic molded product, and is made of a material having high hardness and high rigidity, such as polyamide resin, glass fiber reinforced plastic, and carbon fiber reinforced plastic.

  A back pad 24 is attached to the inner side of the intermediate portion 22A (see FIG. 2) corresponding to the user's lower back portion of the main frame 22. The back pad 24 is made of plastic, and a number of slits 24A extending in the vertical direction are formed at predetermined intervals in the horizontal direction in order to obtain air permeability and flexibility. A concave portion 24 </ b> B is formed at the central portion in the left-right direction of the back plate 24 to avoid contact with the user's spine and tailbone.

  Although not shown in the drawing, a control device, a battery pack, and the like are attached to the intermediate portion 22A of the main frame 22.

  The left and right tip portions 22B and 22C of the main frame 22 are located outside the left and right waist portions of the user, and the left electric motor unit, which is a power generation device, is located below the left and right tip portions 22B and 22C. 26, the right electric motor unit 28 is supported by hanging around a user's sagittal axis (axis in the front-rear direction) by a predetermined angle by a hinge (not shown).

  The front end portions 22B and 22C, which are the left and right tip portions of the main frame 22, are located on the left and right waist sides of the user. A left electric motor unit 26 and a right electric motor unit 28, which are power generation devices, are attached to the lower sides of the front end portions 22B and 22C via hinges (not shown). The hinge part has a rotating shaft (not shown) extending in the front-rear direction. Thereby, each electric motor unit 26 and 28 can be rotated around a user's sagittal axis. Each of the electric motor units 26 and 28 incorporates an electric motor and an angle sensor (not shown) for detecting the rotation angle of the output member of the electric motor in the casing.

  The electric motor units 26 and 28 are detachably connected to base end portions 60A and 62A of swing arms 60 and 62 that are connected to an output member of the electric motor in a torque transmission relationship.

  The swing arms 60 and 62 are made of a light metal such as aluminum, or a material having high rigidity such as glass fiber reinforced plastic or carbon fiber reinforced plastic, and from the outside of the user's hip joint to the front of the user's thigh. It has a shape twisted so as to extend along the thigh and has tip portions 60B and 62B located on the front side of the thigh.

  Thigh front abutment plates 68 and 70 are attached to the front end portions 60B and 62B of the swing arms 60 and 62 by spherical connecting portions 64 and 66, respectively, so that they can swing. The front thigh plate 68, 70 is made of plastic and has a curved shape that matches the shape of the front thigh, and in order to improve air permeability and flexibility, a number of slits 68A extending in the vertical direction, 70A is formed.

  Hook-shaped portions 71 and 72 are integrally formed on the thigh front plate 68 and 70. One end of thigh belts 73 and 74 is connected to the thigh front plate 68 and 70. Engagement members including rectangular openings 75A and 76A, which are detachably engaged with the hook-shaped portions 71 and 72, and belt length adjustment buckles 75B and 76B, at the tip portions of the thigh belts 73 and 74 75 and 76 are attached. In other words, the front ends of the thigh belts 73 and 74 are attached to the belt length adjustment buckles 75B and 76B so that the belt length can be adjusted.

  The thigh belts 73, 74 are engaged with the front thigh plate 68, 70 by engaging the rectangular openings 75 A, 76 A of the engaging members 75, 76 with the hook-shaped portions 71, 72 detachably. It is removably connected and forms a loop that binds the thigh.

  In the walking assist device 10, the main frame 22 is attached to the user's waist by an abdominal belt 30 described later, and the tip portions 60 </ b> B and 62 </ b> B of the swing arms 60 and 62 are thigh belts 73 and 74 and a thigh front plate 68. , 70 are attached to the left and right thighs of the user. In this state, when the user walks, the swing arms 60 and 62 pivot back and forth about the base end portions 60A and 62A by swinging back and forth of the thigh by walking.

  The rotation of the swing arms 60 and 62 is detected by the angle sensors of the electric motor units 26 and 28, whereby the electric motors of the electric motor units 26 and 28 are driven according to the user's walking, and the left and right swing arms are driven. 60 and 62 are rotationally driven according to the user's walking. Thereby, the motive power which an electric motor generate | occur | produces is provided to a user's leg as a walk assistance force.

  Returning to the explanation of the lumbar orthosis 20. An abdominal belt 30 is provided on the inner side of the main frame 22 so as to be wound around the user's abdomen. In the present embodiment, as shown in FIG. 3, the abdominal belt 30 is composed of a left belt 36, a right belt 38, a front belt 40, a left lateral abdominal belt 44, and a right lateral abdominal belt 46. Has been. Each of the belts 36, 38, 40, 44, and 46 is made of a flexible material such as woven fabric or leather.

  The left belt 36 has a belt length adjustment buckle 27 for adjusting the belt length at an intermediate portion, and both ends thereof are connected to upper and lower portions of the left portion of the intermediate portion 22A of the main frame 22 by clasps (not shown). It extends forward from the connecting portion and is folded back to form a rollover V shape. Similarly, the right belt 38 has a belt length adjustment buckle 29 that adjusts the belt length at an intermediate portion, and both ends are attached to upper and lower portions of the right portion of the intermediate portion 22A of the main frame 22 by clasps (not shown). It is connected, extends forward from the connecting part, is folded, and has a rollover V shape.

  A plastic or metal hook member 51 including a hook-shaped portion 51A having a lateral width equivalent to the belt width of the left belt 36 and a belt threading opening 51B is formed in the folded portion of the left belt 36 in the belt threading opening 51B. The left side belt 36 is attached in a passed form so as to be folded back. Similarly, a hook member 52 made of plastic or metal including a hook-shaped portion 52A having a lateral width equivalent to the belt width of the right belt 38 and a belt through opening 52B is attached to the folded front end portion of the right belt 38. The right side belt 38 is attached to the through opening 52B so as to be folded back.

  Engaging members 56 and 58 including rectangular openings 56A and 58A, which are detachably engaged with the hook-shaped portions 51A and 52A, and belt length adjustment buckles 56B and 58B are provided at both ends of the front belt 40. It is attached. In other words, the end portions of the front belt 40 are attached to the belt length adjustment buckles 56B and 58B of the engaging members 56 and 58, respectively.

  The front belt 40 is hooked to the hook-shaped portions 51A and 52A of the hook members 51 and 52 so that the front belt 40 can be detached from the rectangular openings 56A and 58A of the engaging members 56 and 58. The belt 38 is detachably connected.

  As a result, the left belt 36, the right belt 38, and the front belt 40 form a closed loop with adjustable belt length that surrounds the user's abdomen in cooperation with the intermediate portion 22A of the main frame 22, and the main frame 22 is used by the user. Make a waist belt to be worn on the waist.

  The left lateral abdomen belt 44 is inside the left belt 36, and one end thereof is connected to the upper and lower parts of the left part of the intermediate part 22 </ b> A of the main frame 22 with the left belt 36 by a clasp (not shown). . Similarly, the right lateral abdomen belt 46 is inside the right belt 38 and has one end fastened together with the right belt 36 by a stopper (not shown) on the upper and lower parts of the right part of the intermediate part 22A of the main frame 22. Connected. The left flank belt 44 and the left flank belt 46 are wider than the left belt 36 and the right belt 38, and have a curved shape following the shape of the user's flank without impairing the fit of the user to the flank. Keeps it moderately rigid. In FIG. 3, the through-holes indicated by reference numerals 45 and 47 are through-holes opened in the left flank belt 44, the left belt 36, the right flank belt 46, and the right belt 38. , 47 are fixed to the main frame 22 by stoppers (not shown).

  One end portions of the left stabilizer member 80 and the right stabilizer member 90 are fixed to inner portions of the left and right tip portions 22B and 22C of the main frame 22 by stoppers (not shown). The left stabilizer member 80 has a slot-shaped belt passing portion 80A at the front end (the other end), and a portion near the folded end of the left belt 36, that is, a portion near the hook member 51 is disposed in the belt longitudinal direction on the belt passing portion 80A. It is displaceably passed through and supports this. Similarly, the right stabilizer member 90 has a slot-shaped belt passing portion 90A at the front end portion (the other end portion), and a portion near the folded end of the right belt 38, that is, a portion near the hook member 52 is provided in the belt passing portion 90A. The belt is displaceable in the longitudinal direction of the belt and supports it.

  The left stabilizer member 80 includes a connecting member 82 that forms a connecting portion with the main frame 22, a support member 84 formed with a belt passing portion 84 </ b> A that forms a supporting portion that supports the left belt 36, and the connecting member 82 and the supporting member 84. Are constituted by three parts of a connecting member 86 forming a plate-like connecting portion. Similarly, the right stabilizer member 90 includes a connecting member 92 that forms a connecting portion with the main frame 22, a support member 94 formed with a belt passage portion 94 </ b> A that forms a supporting portion that supports the right belt 38, and the connecting member 92. The connecting member 96 includes three components that form a plate-like connecting portion that connects the support member 94. FIG. 4 is an exploded perspective view of the right stabilizer member 90.

  The connecting members 82 and 92 and the supporting members 84 and 94 are made of a highly rigid material, for example, a hard synthetic resin such as polyamide resin or a light alloy such as aluminum. The support members 84 and 94 are provided with lightening openings 84B and 94B for weight reduction.

  The connecting members 86 and 96 are made of a low-rigidity material having flexibility and flexibility, for example, a plurality of woven fabrics 88 and 98 obtained by plain weaving synthetic fibers such as polyester fibers and cotton, and stitched by perforations 89 and 99. In the up-down direction, the walking assist device 10 is a plate-like shape in which the front-rear direction is the plate thickness (thickness direction), the up-down direction is the width direction, and the front-rear direction is the longitudinal direction. High rigidity, low rigidity in the front-rear and left-right directions, high flexibility and flexibility. That is, the connecting members 86 and 96 have a structure that is less rigid in the front-rear and left-right directions than in the up-down direction, and is easily bent in the front-rear left-right direction, that is, the direction that fits the shape of the user's abdomen. .

  The connection between the connection members 82 and 92 and the connection members 86 and 96 and the connection between the support members 84 and 94 and the connection members 86 and 96 are each performed by a fastener, for example, a rivet 100 penetrating them. This connection may be performed by a screw, a clip, or the like.

  According to the waist orthosis 20 having the above-described configuration, the rectangular openings 56A and 58A of the engaging members 56 and 58 at both ends of the front belt 40 are connected to the hook-shaped portions of the hook members 52 and 54 of the left belt 36 and the right belt 38. The abdominal belt 30 is tightened around the user's waist and abdomen by using the waist device 20 by being hooked on 52A and 54A and adjusting the belt length of the front belt 40 according to the size of the user's waist and stomach. To be worn on the waist.

  In this mounted state, the connecting members 86 and 96 of the left stabilizer member 80 and the right stabilizer member 90 are deformed inward in the left-right direction (rearward) so as to follow the waist of the user with the left belt 36 and the right belt 38, respectively. To do. Thereby, the support members 84 and 94 are located in the upper part of the user's left and right upper anterior iliac spines. Since the connection members 86 and 96 exhibit high rigidity in the vertical direction, the vertical positions of the support members 84 and 94 are stable. Therefore, the main frame 22 includes the left and right tip portions 22B and 22C. In cooperation with the left stabilizer member 80 and the right stabilizer member 90, it is supported from the upper part of the left and right upper anterior iliac spines, and the intermediate part 22A is supported from the part where the back plate 24 abuts the user's lower back. Three points will be supported.

  Thereby, the main frame 22 is securely fixed to the user's body (waist), and the main frame 22 including the abdominal belt 30 is reliably prevented from moving during walking.

  When the electric motors of the electric motor units 26 and 28 are driven, the main frame 22 takes charge of the reaction force around the rotation center axis of these electric motors, and the main frame 22 tries to rotate around the rotation center axis. . On the other hand, the left and right end portions 22B and 22C of the main frame 22 that supports the electric motor units 26 and 28 are suspended by the left stabilizer member 80 and the right stabilizer member 90, respectively. Since it is supported by the upper part of the osteophyte, the reaction force during the driving of the electric motor is surely performed without causing the main frame 22 to move.

  This effect is obtained by setting the left stabilizer member 80 and the right stabilizer member 90 in the vertical direction so that the left and right stabilizer members 80 and 90 have a higher rigidity (bending resistance) in the vertical direction than the front and rear left and right direction (plate thickness direction). The support rigidity of the main frame 22 by the member 90 becomes high and becomes remarkable.

  The directionality of the rigidity of the left stabilizer member 80 and the right stabilizer member 90 is determined by the characteristics of the connection members 86 and 96. The rigidity of the connection members 86 and 96 in the vertical direction and the rigidity in the front and rear and right and left directions, It can be set with a high degree of freedom according to the material of the woven fabrics 88 and 98 constituting the members 86 and 96, the mesh, the number of stitches of the woven fabrics 88 and 98, how to insert the perforations 89 and 99, and the like. As a result, the connecting members 86 and 96 exhibit a high rigidity in the vertical direction, and the fitting performance for the user is remarkably improved by using a flexible material such as the woven fabric 88 or 98. The deformation of the connecting members 86 and 96 constituted by the woven fabrics 88 and 98 is not due to elastic deformation as in the spring material or elastomer material, but is due to the bending deformation of the weave, so that it is compared with that due to the spring material or elastomer material. Therefore, it is difficult to cause fatigue and exhibits high durability against repeated deformation.

  The left and right stabilizer members 80 and 94 and the connecting members 82 and 94 that form the attachment portions of the right stabilizer member 90 to the main frame 22 and the support members 84 and 94 that form the support portions of the left and right belts 36 and 38 are required to have the above-described properties. In addition to the connecting members 86 and 96, which are made of a rigid and highly rigid material such as a hard synthetic resin or a light alloy, high durability can be obtained. That is, the connecting members 82 and 92 and the supporting members 84 and 94 are ensured with the required mechanical strength and high durability can be obtained.

  As described above, the left stabilizer member 80 and the right stabilizer member 90 are composed of the individual members including the connecting members 82 and 92, the support members 84 and 94, and the connection members 86 and 96. Can be highly adapted to the required specifications and performance can be improved.

  Since the connection between the connection members 82 and 92 and the connection members 86 and 96 and the connection between the support members 84 and 94 and the connection members 86 and 96 are performed by a fastener such as the rivet 100, the connection members 86 and 96 can be removed and replaced from the connecting members 82 and 92 and the supporting members 84 and 94, and the recombination property of the parts is improved.

  In addition, according to the present embodiment, the left and right end portions 22B and 22C of the main frame 22 are supported from the user's body (upper part of the upper anterior iliac spine) by the left stabilizer member 80 and the right stabilizer member 90. The required rigidity of the main frame 22 itself can be reduced, and the material constituting the main frame 22 can be replaced with a resin that can be injection-molded, such as polyamide resin, instead of carbon fiber reinforced plastic. It is possible to improve the performance.

  Further, according to the lumbar orthosis 20 according to the present embodiment, the abdominal belt 30 is fastened by engaging the rectangular openings 56A and 58A of the engaging members 56 and 58 at both ends of the front belt 40 with the left belt 36 and the right belt 38. Since it is performed by hooking on the hook-shaped portions 52A and 54A of the hook members 52 and 54, the abdomen belt 30 can be easily fastened.

  In particular, the hook members 52 and 54 of the left belt 36 and the right belt 38 are at the folded tip portions of the belts 36 and 38, and the support members 84 and 86 of the left stabilizer member 80 and the right stabilizer member 90 are located in the vicinity of the portions. By being supported more, it does not sag and the arrangement position with respect to the main frame 22 is stable (does not move), so that the rectangular openings 56A, 58A of the engaging members 56, 58 at both ends of the front belt 40 are provided. The hooking portions 52A and 54A of the hook members 52 and 54 of the left belt 36 and the right belt 38 can be easily hooked and removed with one hand.

  In particular, in this embodiment, the left belt 36 and the right belt 38 have hook members 52 and 54, respectively, and the engagement members 56 and 58 are provided at both ends of the front belt 40. In this case, the left hand or the right hand is hooked in advance, and the left hand is used freely by hooking the lower hand when the lower back device 20 is worn. A person can also wear the waist orthosis 20.

  In any of the embodiments, the buckle of each part is not limited to the hook-type one, and may be a clip-type buckle with claw engagement used as many belt buckles. Even in the case of a clip-type buckle, the buckle can be easily fastened and released with one hand by setting the position where the one side member of the buckle does not wobble. In addition to the buckle, the belt of each part may be fastened by a hook-and-loop fastener. The configuration of the abdomen belt 30 is not limited to that of the above-described embodiment, and may be any that surrounds the user's abdomen so as to attach the main frame 22 to the waist. Further, the waist orthosis 20 can be applied not only to the thigh but also to a type of walking assistance device that applies walking assistance force to the lower leg.

DESCRIPTION OF SYMBOLS 10 Walking assistance apparatus 20 Lumbar orthosis 22 Main frame 24 Back pad 26 Left side electric motor unit 28 Right side electric motor unit 30 Abdominal belt 36 Left side belt 38 Right side belt 40 Front side belt 44 Left side stomach part belt 46 Right side stomach part belt 60, 62
68, 70 Front thigh pad 76, 78 Thigh belt 84, 86 Auxiliary belt 80 Left stabilizer member 82 Connection member 84 Support member 86 Connection member 90 Right stabilizer member 92 Connection member 94 Support member 96 Connection member

JP 2006-320351 A JP 2009-95645 A

Claims (5)

It is a lower back orthosis of a walking assistance device that applies power generated by the power generation device to the user's lower limbs as walking assistance force,
A main frame that is disposed on the user's waist and has a substantially C-shape extending from the waist back to the outside of the left and right waist sides, and the power generator can be attached to the left and right tip portions;
An abdomen belt that is connected to the main frame inside the main frame and wound around the user's abdomen;
One end is connected to the left and right tip portions of the main frame, and the left and right stabilizer members support the middle portion of the abdominal belt at the other end,
The stabilizer member is constituted by separate parts including a connecting portion with the main frame, a supporting portion of the abdominal belt, and a plate-like connecting portion connecting the connecting portion and the supporting portion.
The connecting portion and the supporting portion are made of a highly rigid material, the connecting portion is made of a low-rigidity material, and the connecting portion has a plate shape with a plate thickness in the front-rear direction, so that the rigidity in the vertical direction is high. The waist brace of the walking assist device has lower rigidity in the front-rear direction than in the up-down direction.   The lumbar orthosis of the walking assistance device according to claim 1, wherein the connection portion is configured by a woven belt formed by stitching a plurality of woven fabrics.   The waist brace of the walking assistance device according to claim 1 or 2, wherein the connecting portion and the supporting portion are made of a hard synthetic resin.   The waist part of the walking assistance device according to any one of claims 1 to 3, wherein the connection between the connection part and the connection part and the connection between the support part and the connection part are each performed by a fastener. Brace.   A walking assistance device comprising the lower back orthosis according to any one of claims 1 to 4.

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