JP5578031B2 - Leg orthosis - Google Patents

Description

  The present invention relates to a leg brace that is attached to a user's leg and supports the movement of the leg. In particular, the present invention relates to a leg brace for a user who is unable to move the knee joint.

  Leg braces that support the movement of the user's legs, particularly the movement of the knee joint, are known. In recent years, in addition to the conventionally known leg brace called a long leg brace, a walking assist device that includes an actuator that applies torque to the knee joint and actively assists walking motion has been studied. An example of such a walking support device is disclosed in Patent Document 1. The walking assist device of Patent Document 1 has a configuration in which links attached to each of the thigh and the lower leg swing with each other by a motor positioned on the side of the knee joint. The thigh link in the walking assist device has a structure in which a leg rest made of soft resin is applied from the front and back of the thigh and these are connected by a plurality of belts on the side of the thigh. The lower leg link also has a structure in which a soft resin leg rest is applied from the front and rear of the lower leg, and these are connected by a plurality of belts on the side of the lower leg.

JP 2002-301124 A

  The leg orthosis may be used for assisting muscle strength of a healthy person such as an operator who carries a heavy object, or may be used for walking support or rehabilitation of a non-healthy person. As in the walking support device of Patent Document 1, a member constituting a thigh link (a member referred to as “leg rest” in Patent Document 1) is applied to the front and rear of the thigh, and these are connected by a plurality of belts. It is hard to say that it is easy for non-healthy people to wear. When the orthosis is provided with an actuator (typically a motor), the complexity / weight of the link structure is one factor that makes it difficult to wear compared to a conventional leg orthosis (long leg prosthesis) without an actuator. ing. In particular, it is expected that a non-healthy person who is half-free is likely to have considerable difficulty in wearing with one arm because both legs and arms are inconvenient. The present specification provides a leg brace having a devised structure so as to reduce the labor of wearing.

  When a user wears a leg brace as well as a non-healthy person, the leg brace is usually worn in a sitting posture. At this time, if the member is applied to the front and back of the thigh, it is necessary to hold the leg rests arranged on the back side of the thigh. Two arms are required to put the other leg rest on the thigh while holding the member arranged on the back side of the thigh. Therefore, the present specification provides a leg brace that is devised so that a member positioned on the back side of the thigh is held without the user using the hand.

  One aspect of the leg orthosis disclosed in the present specification includes a thigh link attached to the user's thigh and a lower thigh link attached to the lower thigh. The thigh link is swingably connected to the crus link. The thigh link surrounds the thigh with a front thigh frame located on the front side of the thigh and a curved support plate located on the back side of the thigh when a person wears the leg brace, and supports the thigh. The front thigh frame extends from one side of the knee through the front thigh to the other side of the knee, and both ends of the front thigh frame are swingably connected to the crus link on each side of the knee. The curved support plate is curved substantially following the curved surface on the back side of the thigh. The curved support plate is applied over a substantially half circumference on the back side of the thigh, and fixes the thigh link. One end of the curved support plate is rotatably connected to the front thigh frame on one side of the thigh. More specifically, one end of the curved support plate is connected to the thigh front frame so as to rotate in a plane intersecting the thigh longitudinal direction. In addition, the other end of the curved support plate is provided with a fastener that engages and disengages from the front thigh frame on the other side of the thigh. The curved support plate is provided with a cam lever extending from one end connected to the front thigh frame toward the back side of the front thigh frame. The cam lever rotates together with the curved support plate. In other words, the cam lever extends in a space between the front thigh frame and the front thigh before mounting. When the thigh link is attached, the cam lever is pressed from the front surface of the thigh as the front thigh frame approaches the front surface of the user's thigh. As a result, the cam lever rotates the curved support plate in a direction approaching the back of the thigh. When the front thigh frame is pressed against the front surface of the thigh by this cam lever, the curved support plate passively approaches the back side of the thigh, and both fasteners approach each other. Therefore, the user can operate the fastener with one hand and fasten the front thigh frame and the curved support plate without having to hold the curved support plate on the back side of the thigh. The clasp may be a lever-type buckle or ratchet, whereby the thigh front frame and the curved support plate firmly sandwich the thigh and the thigh link is fixed. The clasp may be a hook that engages with a lever-type buckle or ratchet provided at an end of the front thigh frame.

  It is preferable that the curved support plate is rotatably connected to the front thigh frame on the laterally outer side of the thigh, and the clip is arranged to engage with and disengage from the front thigh frame on the laterally inner side of the thigh. A user who has difficulty with half-body uses the left (right) arm when attaching a leg brace to the right (left) leg, and is easier to handle when the clip is positioned inside the thigh.

  The present specification also discloses another mechanism that eliminates the need for the user to hold the back thigh member. In another form of leg brace, the thigh link includes a curved support plate (C-shaped support plate) that is curved in a C shape. The front thigh frame passes through the front thigh, as in the above-mentioned leg brace, and both ends are swingably connected to the crus link at the sides of the knee. The C-shaped support plate is applied over a half circumference on the back side of the thigh, and both ends are connected to the front thigh frame on the side of the thigh to fix the thigh link. In other words, the C-shaped support plate has a length that encloses more than a half circumference of the thigh. At least one end of the C-shaped support plate can be disengaged. In other words, the C-shaped support plate may have a structure in which both ends engage and disengage from the front thigh frame. This C-shaped support plate is characterized in that the distance between both ends thereof is shorter than the lateral width of the thigh at a position where the C-shaped support plate is to be attached. Due to this feature, once the C-shaped support plate is fitted into the thigh, it does not fall even when the hand is released. Therefore, the user can handle the front thigh frame with one hand and fasten it with the C-shaped support plate. Of course, the distance between both ends of the C-shaped support plate must be larger than the width of the thigh when the thigh is deformed by its elasticity and becomes the narrowest.

  The above-mentioned leg orthosis has been devised for the purpose of reducing the trouble of wearing the leg orthosis with an actuator for non-healthy persons, especially non-healthy persons who are half-free. However, as is clear from the above-described structure, the novel technique disclosed in this specification is not limited to leg braces for non-healthy persons, and can also be applied to leg braces without actuators. Note that there are.

  The technology disclosed in the present specification provides a leg brace that reduces the effort of wearing.

It is a perspective view of the whole leg orthosis. It is a front view of a leg orthosis knee part. It is the figure which looked at the leg orthosis knee part from diagonally backward. It is a figure showing a leg brace in the state where a user is seated. It is a figure which shows the thigh link mounting | wearing procedure when it sees with a thigh cross section. It is a figure which shows the thigh link mounting | wearing procedure of the leg orthosis of 2nd Example. It is a figure which shows the thigh link mounting | wearing procedure of the leg orthosis of 3rd Example.

  1 to 3 show schematic views of a leg brace 10 according to the first embodiment. As shown in FIG. 1, the leg brace 10 is a device that is attached to the left leg of the user U and supports the walking motion of the user U. The leg brace 10 is used, for example, for the rehabilitation of the user U who has become difficult to walk by himself. By using the leg brace 10, the function recovery of the user U is promoted.

  In the description of this embodiment, the X axis is defined in the front-rear direction of the user U wearing the leg brace 10, the Y axis is defined in the left-right direction of the user U, and the Z axis is defined in the vertical direction. The positive direction of the X axis is the front of the user U in the standing posture, the positive direction of the Y axis is the left side of the user U, and the positive direction of the Z axis is vertically upward.

  As shown in FIG. 1, the leg orthosis 10 includes a control unit 12, a thigh link 20, a crus link 50, and a foot link 90. The control unit 12 incorporates a small computer and a battery, supplies power to each part of the leg brace 10, and controls the operation of each part of the leg brace 10. The control unit 12 is an example, but is attached to the trunk (waist) of the user U. The control unit 12 is fixed to the trunk of the user U by the wearing belt 14. Note that the position where the control unit 12 is mounted is not particularly limited, and may be a structure that is mounted on the back of the user U, for example.

  The thigh link 20, the lower leg link 50, and the foot link 90 are attached to the affected leg UA (here, the left leg) of the user U who needs assistance. Specifically, the thigh link 20 is attached to the thigh UB, the lower leg link 50 is attached to the lower leg UD, and the foot link 90 is attached to the foot UE.

  The thigh link 20 includes a front thigh frame 22 and a curved support plate 28 as main components. A thigh pad 24 is attached to a portion of the back side of the front thigh frame 22 that contacts the front surface of the thigh. Although the thigh link 20 will be described in detail later, the thigh UB is surrounded and firmly fixed by the front thigh frame 22 and the curved support plate 28. The crus link 50 is mainly composed of a crus frame 52 (a crus front frame 52a and a crus side frame 52b). A crus pad 54 is attached to a portion of the back side of the crus front frame 52a that contacts the lower knee. The front lower leg frame 52 a is positioned in front of the lower leg UD of the user U and supports the lower leg UD via the lower leg pad 54. The foot link 90 includes a foot plate 92 and a shoe 94 fixed to the foot plate 92. When the user U wears the shoes 94, the foot UE of the user U is firmly fixed to the foot link 90.

  The thigh link 20 and the crus link 50 are connected via a pair of knee joint mechanisms 40. Each knee joint mechanism 40 is a rotation mechanism around one axis (also referred to as a Y axis or a pitch axis), and each is located on the side of the knee UC when the leg brace 10 is worn.

  The lower leg link 50 and the foot link 90 are connected via a pair of ankle joint mechanisms 70. Each ankle joint mechanism 70 is a rotation mechanism around one axis (Y axis), and connects the lower leg side frame 52b of the lower leg link 50 and the foot link 90 in a swingable manner.

  The knee joint mechanism 40 located on the outer side of the affected leg UA includes an actuator (for example, a motor), a speed reducer, and an angle sensor, and is also a drive unit that swings the crus link 50 with respect to the thigh link 20. . The knee joint mechanism 40 is connected to the control unit 12 via the cable 16 and is operated by electric power from the control unit 12, and its operation is controlled by the control unit 12. Although it is an example, the control unit 12 stores target pattern data describing a change over time of the target angle of the knee joint mechanism 40, and the knee joint mechanism 40 is set so that the actual angle matches the target angle. The actuator of the joint mechanism 40 is controlled.

  With the above configuration, the leg orthosis 10 is attached to the affected leg UA (excluding the control unit 12), and assists the user U in walking by applying torque to the knee joint of the affected leg UA. Note that the operation mode of the leg brace 10 is not particularly limited, and the movement of the affected leg UA may be controlled almost completely, or an assist force is applied following the movement of the affected leg UA. There may be.

  The overall structure of the leg orthosis 10 has been described above. Next, the structure of the thigh link 20 will be described in detail. The thigh link 20 has a structure in which the thigh UB is surrounded by the front thigh frame 22 and the curved support plate 28 and fixed to the thigh UB. When the leg brace 10 is mounted, the thigh front frame 22 is positioned on the front side of the thigh UB, and the curved support plate 28 is positioned on the rear side of the thigh UB. The front thigh frame 22 extends from one side of the knee through the front thigh side to the other side of the knee. Both ends of the front thigh frame 22 are connected to the crus link 50 at the sides of the knee.

  The curved support plate 28 is curved substantially following the curved surface on the back side of the thigh UB. The curved support plate 28 has a length that can cover substantially half of the thigh UB. The curved support plate 28 is applied over a substantially half circumference on the back side of the thigh UB, and is connected to the front thigh frame 22 to fix the thigh link 20.

  One end of the curved support plate 28 is rotatably connected to the front thigh frame 22 via a hinge 29 located on one side of the thigh (outside the thigh). In other words, one end of the curved support plate 28 is connected to the thigh front frame 22 so as to rotate in a plane intersecting the longitudinal direction of the thigh UB (cross section in FIG. 5 described later). The other end of the curved support plate 28 is provided with a fastener 26 that engages with and disengages from the front thigh frame 22 on the other side of the thigh (the inner side of the thigh) (see FIG. 2).

  The curved support plate 28 is provided with a cam lever 25 extending from one end connected to the front thigh frame 22 to a space corresponding to the back side of the front thigh frame 22. In other words, the curved support plate 28 is provided with a cam lever 25 that extends from one end connected to the front thigh frame 22 toward the back side of the front thigh frame 22. The cam lever 25 is not shown in FIGS. 1 to 3, but is shown in FIGS. Next, the function of the cam lever 25 will be described in detail with reference to FIGS.

  FIG. 4 shows a state where the foot link 90 and the lower leg link 50 are attached, but the thigh link 20 is not yet attached. Normally, the user U wears the leg brace 10 in a seated posture. The thigh link 20 is supported by the crus link 50 and is aligned with the longitudinal direction of the crus link 50. As shown in FIG. 4, the clip 26 is detached, and the curved support plate 28 has an end on the clip side opened from the thigh front frame 22. From this state, the user U rotates the thigh link 20 so as to cover the thigh UB as indicated by the arrow in FIG. When the thigh link 20 is moved closer to the thigh UB, the curved support plate 28 is lifted so as to approach the back side of the thigh by the action of the cam lever 25 as described below.

  FIG. 5 shows the thigh link 20 viewed from the thigh cross section, and shows the mounting procedure from (A) to (D). FIG. 5 is a cross section when the thigh is viewed from the knee side toward the buttocks side. Further, the upper side of the drawing in FIG. 5 corresponds to the vertically upward direction. When the front thigh frame 22 is positioned above the thigh (FIG. 5A), the clip 26 is detached from the curved support plate 28, and one end on the clip 26 side is lowered by the action of gravity. As shown in FIG. 5A, the cam lever 25 extends from the end of the curved support plate 28 on the hinge 29 side. The cam lever 25 extends into a space between the back side of the front thigh frame 22 and the front thigh side. The cam lever 25 is fixed to the curved support plate 28 and rotates together with the curved support plate 28 around the hinge 29. Reference numeral 23 denotes a cover for holding the cam lever 25, and is not shown in FIGS. Reference numeral 21 denotes a hook that engages with the fastener 26 of the curved support plate 28.

  When the front thigh frame 22 is brought close to the thigh UB, the cam lever 25 comes into contact with the front surface of the thigh UB. Further, when the front thigh frame 22 is brought closer to the thigh UB, the cam lever 25 is pushed upward. The cam lever 25 rotates upward about the hinge 29. A reference symbol P1 in FIG. 5B indicates a contact position between the cam lever 25 and the thigh UB. Since the cam lever 25 is fixed to the curved support plate 28, the curved support plate 28 also rotates upward so as to approach the back side of the thigh UB as the cam lever 25 rotates upward (FIG. 5B). ). The cam lever 25 has a slight elasticity, and as shown in FIG. 5 (B), it is slightly curved when pushed by the thigh UB. When the front thigh frame 22 is further brought closer to the thigh UB, the cam lever 25 further rotates. The curved support plate 28 also rotates further upward, and the end of the curved support plate 28 on the side of the fastener 26 is lifted as indicated by an arrow P2 in FIG.

  FIG. 5C shows a state in which the front thigh frame 22 has come close to the front surface of the thigh UB. If the clip 26 is lifted to the extent shown in FIG. 5C, the user can hold the clip 26 with one hand (right hand). At this time, as shown in the coordinate system of FIG. 5, the longitudinal direction of the thigh UB of the user's left leg is along the X-axis direction, the hinge 29 is located on the outer side of the thigh, and the clip 26 is Located on the inner side of the thigh.

  The user lifts the fastener 26, hooks it on the hook 21, and then turns the fastener 26 in the direction of arrow P3. The clasp 26 is a lever-type buckle or ratchet type. When the clasp 26 is rotated, the hook 21 is pulled in, and the front thigh frame 22 and the curved support plate 28 are fastened to each other. Thus, the mounting of the thigh link 20 is completed. The cam lever 25 is pressed by the cover 23 so as not to protrude forward from the front thigh frame 22.

  As described above, the curved support plate 28 is fixed to the curved support plate 28 on the hinge 29 side, and the curved support plate 28 moves toward the thigh UB as the front thigh frame 22 is brought closer to the thigh UB by the cam lever 25 extending to the back side of the front thigh frame 22. Lift up close to the back. In other words, as the front thigh frame 22 approaches the front surface of the thigh UB, the cam lever 25 is pressed from the front surface of the thigh UB, and the curved support plate 28 rotates in a direction approaching the back surface of the thigh UB. Since the clasp 26 approaches the end of the thigh front frame 22, the user can easily handle the clasp 26 with one hand and attach the thigh link 20.

  Next, the leg orthosis of 2nd Example is demonstrated. Since the overall structure of the leg brace of the second embodiment is the same as that of the leg brace 10 of the first embodiment, description thereof is omitted. The leg brace of the second embodiment is different from the first embodiment in the structure of the thigh link. In FIG. 6, the attachment procedure of the thigh link 120 of 2nd Example is shown. FIG. 6 corresponds to FIG. 5 of the first embodiment. That is, FIG. 6 also shows a cross section of the thigh when the user is seated. The thigh link 120 has a structure in which a thigh front frame 122 and a curved support plate 128 are rotatably connected by a hinge 129. Reference numerals 126 and 121 denote a fastener and a hook, respectively, and correspond to the fastener 26 and the hook 21 of the first embodiment. The thigh link 120 does not include the cam lever 25 of the first embodiment.

  Since the curved support plate 128 of the second embodiment is curved in a C shape, it may be referred to as a C-shaped support plate 128 below. The thigh link 120 surrounds the thigh UB with a front thigh frame 122 and a C-shaped support plate 128 (curved support plate) and is fixed. The C-shaped support plate 128 has a length that surrounds more than a half circumference of the thigh. The C-shaped support plate 128 is applied over a half circumference on the back side of the thigh, and both ends are connected to the thigh front frame 122 on the side of the thigh UB, thereby fixing the thigh link 120. As shown in FIG. 6A, one end (the end corresponding to the outer side of the thigh) of the C-shaped support plate 128 is connected to the front thigh frame 122 by a hinge 129 and the other end (the side of the thigh). The end portion corresponding to the inner side is provided with a clasp 126 and can be engaged and disengaged from the hook 121 of the front thigh frame 122.

  Furthermore, as shown in FIG. 6 (A), the C-shaped support plate 128 has a distance L1 between both ends thereof shorter than the lateral width L2 of the thigh at a position where the support plate is to be attached. Due to this feature, once the C-shaped support plate 128 is fitted into the thigh UB, it does not fall even when the hand is released (state of FIG. 6C). When attaching the leg brace, the user wears the foot link and the lower leg link in a seated posture, as in the first embodiment shown in FIG. Thereafter, the thigh link 120 is rotated so as to cover the front surface of the thigh UB (corresponding to the upper surface when seated). As shown in FIG. 6B, before the thigh link 120 is mounted, one end of the C-shaped support plate 128 is opened from the front thigh frame 122, and the front thigh frame 122 can be covered from the front side of the thigh. it can. After covering the thigh front frame 122, the user rotates the C-shaped support plate 128 in the direction of arrow P6 by pushing the rear end of the C-shaped support plate.

  The distance L1 between the two ends of the C-shaped support plate 128 is smaller than the thigh width L2, but larger than the width when the thigh is deformed by elasticity and becomes the narrowest. Since the thigh UB is flexible and deforms, as shown in FIG. 6C, the C-shaped support plate 128 can be fitted into the thigh UB. Once the C-shaped support plate 128 is fitted into the thigh, the distance L1 between both ends is narrower than the width L2 of the thigh UB, so that the end is caught on the thigh and does not fall. Next, the user lifts the fastener 126 with one hand and hooks it on the hook 121 of the front thigh frame 122 as indicated by the arrow P7 in FIG. Finally, as shown in FIG. 6D, the user rotates the fastener 126 in the direction of the arrow P8. As in the first embodiment, the fastener 126 is a lever-type buckle, and when it is turned, the hook 121 is pulled. As a result, the thigh front frame 122 and the C-shaped support plate 128 are tightened, and the thigh link 120 is firmly fixed to the thigh UB. Thus, the mounting of the thigh link 120 is completed.

  Next, the leg orthosis of 3rd Example is demonstrated. Since the overall structure of the leg brace of the third embodiment is the same as that of the leg brace 10 of the first embodiment, description thereof is omitted. The leg brace of the third embodiment is different from the second embodiment in the structure of the thigh link. FIG. 7 shows a procedure for attaching the thigh link 220 of the third embodiment. FIG. 7 corresponds to FIG. 5 of the first embodiment. The thigh link 220 mainly includes a thigh front frame 222 and a curved support plate 228. The curved support plate 228 has fasteners 226 a and 226 b at both ends thereof, and each engages and disengages from the hooks 221 a and 221 b at both ends of the front thigh frame 222. That is, the curved support plate 228 of the third embodiment can be completely separated from the front thigh frame 222.

  Similarly to the curved support plate 128 of the second embodiment, the curved support plate 228 of the third embodiment is also curved in a C shape. Therefore, the curved support plate 228 may be referred to as a C-shaped support plate 228. The C-shaped support plate 228 has a length that surrounds more than half of the thigh. The C-shaped support plate 228 is applied over a half circumference on the back side of the thigh, and both ends are connected to the thigh front frame 222 on the side of the thigh UB to fix the thigh link 220. As shown in FIG. 7A, the distance L3 between both ends of the C-shaped support plate 228 is shorter than the lateral width L4 of the thigh at the position where the support plate is to be attached. Due to this feature, once the C-shaped support plate 228 is fitted into the thigh UB, it does not fall even when the hand is released. Since the C-shaped support plate 228 is completely independent from the front thigh frame 222, the C-shaped support plate 228 is moved regardless of the state of the front thigh frame 222 as indicated by an arrow P9 in FIG. Can fit into the thigh UB. Once inserted, the C-shaped support plate 228 is caught on the thigh and does not fall, so the user does not need to hold the C-shaped support plate 228 with his / her hand. Next, the user brings the thigh front frame 222 closer to the thigh as indicated by the arrow P10 in FIG. As shown in FIG. 4 of the first embodiment, since the thigh link 220 is supported by the thigh link attached to the user's thigh UD, the user only has to tilt the thigh link 220 forward. Finally, the user lifts the fasteners 226a and 226b at the respective ends of the C-shaped support plate one by one and engages the hooks 221a and 221b of the front thigh frame 222. The fasteners 226a and 226b are lever-type buckles as in the first and second embodiments, and the thigh link 220 can be firmly fixed to the thigh UB by pulling the hook.

  Points to be noted about the leg orthosis of the embodiment will be described. Each frame is made of metal or reinforced plastic. The curved support plate and the C-shaped support plate are preferably made of a slightly elastic material such as resin. The clasp provided at the end of the curved support plate or the C-shaped support plate may be a lever-type buckle or ratchet that pulls the opponent when the opponent is fastened, the thigh front frame is provided with a buckle, etc. The fastener may be a hook that engages the buckle. Although the leg brace of the embodiment includes an actuator, the technique disclosed in the present specification, in particular, the technique for facilitating the mounting of the thigh link can be applied to a leg brace that does not include an actuator.

  The curved support plate 28 of the first embodiment has a length that covers the back side of the thigh substantially half a circle. The curved support plate 28 of the first embodiment is configured to have a length sufficient to be applied over the half circumference of the back side of the thigh, like the C-shaped support plate of the second and third embodiments. Also good. At this time, the distance between both ends of the curved support plate (C-shaped support plate) is configured to be shorter than the lateral width of the thigh at a position where the support plate is to be attached. With such a configuration, after the curved support plate is passively lifted by the cam lever 25, the user can further lift the curved support plate with his / her hand and fit the curved support plate into the thigh. In such a configuration, the curved support plate can be lifted passively by the cam lever, and the curved support plate can be hooked on the thigh further above and locked.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

10: Leg braces 20, 120, 220: Thigh links 22, 122, 222: Front thigh frame 25: Cam levers 26, 126, 226: Fastener 28: Curved support plate 29, 129: Hinge 50: Lower leg links 128, 228: C-shaped support plate (curved support plate)

Claims (3)

A thigh link attached to the user's thigh;
A thigh link that is swingably connected to the thigh link and is attached to the user's thigh,
And the thigh link is
A front thigh frame extending from one side of the knee to the other side of the knee through the front side of the thigh and having both ends swingably connected to the lower leg link on each side of the knee;
One end is rotatably connected to the front thigh frame on one side of the thigh, and the other end has a fastener that engages and disengages from the front thigh frame on the other side of the thigh, A curved support plate that is applied over approximately half the back of the thigh;
With
The curved support plate is provided with a cam lever extending from the one end toward the back side of the front thigh frame, and the cam lever is pressed from the front thigh as the front thigh frame approaches the front thigh of the user. The leg brace is characterized in that the curved support plate rotates in a direction approaching the back of the thigh.   The curved support plate is rotatably connected to the front thigh frame on the laterally outer side of the thigh, and the fastener is engaged and disengaged from the front thigh frame on the laterally inner side of the thigh. The leg orthosis according to claim 1. A thigh link attached to the user's thigh;
A thigh link that is swingably connected to the thigh link and is attached to the user's thigh,
And the thigh link is
A front thigh frame extending from one side of the knee to the other side of the knee through the front side of the thigh and having both ends swingably connected to the lower leg link on each side of the knee;
A C-shaped support plate, at least one end of which can be engaged with and disengaged from the front thigh frame, and both ends are connected to the front thigh frame at the sides of the thigh, and are applied over a half circumference on the back side of the thigh;
With
A leg brace characterized in that a distance between both ends of the C-shaped support plate is shorter than a lateral width of the thigh at a position where the C-shaped support plate is to be attached.

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