Seating device

Abstract

To provide a sitting brace that allows a user to put all his or her weight on it and take a seat on the spot, enables the user to naturally walk without any trouble while wearing it, and has improved wearability.SOLUTION: A sitting brace is provided with a brace main body 1 that comprises: an upper link 2 which should mainly go along the thigh of a human body; a lower link 3 which is arranged below the upper link 2 and to go mainly along the body's lower leg; a joint 4 which connects the upper link 2 and the lower link 3 so as to enable rotation and to enable fixing the angle therebetween; a seat part 6 attached to the upper link 2 and to cover the body's buttocks; a knee support part 7 attached to the lower link 3 and to cover below the body's knees; an ankle brace 8 connected to the lower link 3 and to be wrapped around the body's ankles; and a movement mechanism unit 9 for relatively moving the position of the ankle brace 8 with respect to the lower link 3.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a seating device that can be seated and is also designed so as not to interfere with walking when walking.

Background Art

[0002] There is known a walking assist device based on the concept of "walking assistance" that is worn on the human body to prevent falls and assist walking for those who have difficulty walking (see, for example, Patent Document 1). In Patent Document 1, a link mechanism is provided along the legs (lower limbs), and walking is assisted thereby. In such a walking assist device, in addition to suspending the link mechanism with the waist of the human body for positioning the link mechanism, it is necessary to arrange a plate on the sole of the foot and fix the link mechanism to this plate on the sole of the foot. In this way, the link mechanism acts at a fixed position and applies torque for assisting walking. However, if there is a plate on the sole of the foot as in Patent Document 1, it is very difficult to walk. Also, each time the plate on the sole of the foot touches the ground, vibration is transmitted to the link mechanism, which may cause a sound when the members collide, or may shorten the lifespan of the members due to these collisions.

[0003] There are also walking assist devices without such a plate on the sole of the foot (see, for example, Patent Document 2). In Patent Document 2, the tip of a walking stick member extending along the leg is grounded to support the human body and assist walking. Since the purpose of this Patent Document 2 is also "walking assistance", in addition to the wearer's own feet, the assist device is grounded to support the body.

[0004] On the one hand, when doing standing work, it is easier for workers if they can sit down to work. However, due to space constraints or the atmosphere of the site, there are places such as medical sites and factory workplaces where chairs for sitting cannot be placed. Also, in terms of work efficiency, there are jobs that are better done standing. When working in such places, workers have no choice but to stand on their own, which is a great burden. To solve such problems, there is a need for equipment that allows sitting and also enables walking. In the case of work that is more efficient when standing, it is even more preferable if sitting can be provided in a state close to the standing state to reduce the burden.

[0005] Patent Document 2 is provided with a seating part for sitting. However, since this seating part is elongated in the front-rear direction, inevitably, a thickness is generated in the front-rear direction of the walking assist device. Also, as described above, since Patent Document 2 is solely aimed at "walking assistance", grounding of the device itself is required. However, if the device has a part that touches the ground every time one walks, for those who can walk without any assistance and have no difficulty walking, it only increases the grounding part during walking, and also increases the resistance with the floor surface, rather becoming an obstacle to walking. Moreover, the walking assist device of Patent Document 2 has the left and right leg parts integrated, which is time-consuming to wear.

[0006] In order to meet the demands of those who have no difficulty walking, such as wanting to sit down and work during standing work or sometimes wanting to sit down and rest, the issue becomes whether one can walk naturally without any hindrance even when wearing a seating device. Neither Patent Document 1 nor 2 addresses the issues from such a perspective.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0008] The present invention is considered in view of the above prior art, and aims to provide a seating device that can hold a weight and be seated on the spot, can perform natural walking without any inconvenience even when worn, and has improved wearability.

Means for Solving the Problems

[0009] To achieve the above object, the present invention provides a seating device comprising a pair of fixture bodies formed as separate bodies that extend along the legs of a human body and are to be attached to the legs. The fixture body includes an upper link that should mainly follow the thigh of the human body's leg, a lower link arranged below the upper link that should mainly follow the lower leg of the human body's leg, a joint that rotatably connects the upper link and the lower link and can fix the angle between them, a seating portion attached to the upper link that should cover the buttocks of the human body, a below-knee support portion attached to the lower link that should cover below the knees of the human body, an ankle fixation that is connected to the lower link and should be wound around the ankle of the human body Part and a moving mechanism portion that relatively moves the position of the ankle fixation portion with respect to the lower link.

[0010] Preferably, the lower link has a stick at a position corresponding to at least the lower side of the ankle of the human body, and the stick is formed of a material having higher rigidity than the lower link.

[0011] Preferably, the lower link and the ankle fixation portion are rotatably connected.

[0012] Preferably, the lower link and the ankle fixation portion are detachably connected.

[0013] Preferably, the moving mechanism portion has a compression spring attached to the ankle fixing portion, and by biasing the compression spring in the compression direction, the lower link can slide with respect to the ankle fixing portion.

Advantages of the Invention

[0014] According to the present invention, in a state where the seating device according to the present invention is worn on a human body, by fixing the angle between the upper link and the lower link by a joint, when the wearer bends down, the buttocks hit the seating portion, and at the same time, the lower knee hits the lower knee support portion, and the tip of the lower link hits the ground. As a result, even when the wearer bends down and sits down, the wearer can place their weight in a stable state and maintain their posture on the spot. Further, since the upper link and the lower link can rotate by a joint, even when the wearer walks, the upper link remains along the thigh and the lower link remains along the lower leg according to the bending angle of the knee, so it does not interfere with walking. At this time, by arranging the lower end of the lower link above the sole of the wearer's foot, the tip of the lower link does not touch the ground each time the foot touches the ground during walking. Therefore, unnecessary vibration is not given to the wearer. Furthermore, like normal walking, only the sole touches the ground during walking, so natural walking can be performed without any inconvenience. In addition, since the seating device according to the present invention is composed of a pair of separately formed device bodies, it can be attached separately to the left and right legs, and the wearability is high.

[0015] Also, by providing a stick made of a material with high rigidity on the lower side of the lower link, the stick receives the weight of the wearer when sitting, and further is a part that supports the wearer, so it is preferable from the viewpoint of durability. In addition, since the lower link and the stick are separate members, if a length adjustment mechanism is provided here, the overall length of the device body can be defined according to the length of the wearer's leg. Furthermore, since the vicinity of the lower end of the lower link is loaded and is also the most easily damaged part, making it a separate body facilitates the replacement of only this part.

[0016] In addition, since the lower link and the ankle fixing part are rotatably connected, the wearer can freely bend the ankle in the front-back direction, making walking easier and allowing the entire sole of the foot to touch the ground and stabilize the posture when sitting.

[0017] In addition, the lower link and the ankle fixing Part Since they are detachably connected, the ankle fixing part can be removed when wearing. When winding the ankle fixing part around the ankle, it is often done while bending down, so this operation can be performed with only a relatively small ankle fixing part.

[0018] In addition, by making the lower link slidable relative to the ankle fixing part via a compression spring, the lower link automatically protrudes downward relative to the ankle fixing part by its own weight. Therefore, just by depositing the weight on the seating part for the wearer to take a sitting posture, the lower end of the lower link can contact the ground and support the wearer.

Brief Description of the Drawings

[0019]

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Mode for Carrying Out the Invention

[0020] The seating device according to the present invention is composed of, for example, a pair of device bodies 1. Among them, the device body 1 to be worn on the right leg side is shown in FIGS. 1 to 7. The device bodies 1 to be worn on the right and left legs of the human body are formed separately, and are formed so as to extend along the legs when worn on the human body. The device body 1 has an upper link 2 and a lower link 3. The upper link 2 is in the shape of a rod or a flat bar, and mainly extends along the thigh when worn on the human body. The lower link 3 is in the shape of a rod or a flat bar, and is arranged below the upper link 2 and mainly extends along the lower leg when worn on the human body. These upper link 2 and lower link 3 are connected by a joint 4. This joint 4 rotatably connects the upper link 2 and the lower link 3. Therefore, a link mechanism is formed by the upper link 2, the lower link 3, and the joint 4. The joint 4 has a lock mechanism (not shown). By operating this lock mechanism (for example, using the operation part 4a provided in the joint 4), the angle between the upper link 2 and the lower link 3 can be fixed (see FIG. 7). As this lock mechanism, various mechanisms can be applied.

[0021] The lower link 3 has a stick 5. This stick 5 is in the shape of a rod or a flat bar, and when worn on the human body, it extends further downward from the lower link 3. At the tip of the stick 5, a grounding portion 5a made of a material with relatively high impact resistance and durability is formed. In the example of the figure, the stick 5 is provided separately as a part of the lower link 3, but the lower link 3 may be extended downward integrally as it is. Since this portion of the stick 5 receives the weight of the wearer in the sitting mode described later and further supports the wearer, it is preferably attached as a separate body below the lower link 3 with a material having higher rigidity than the lower link 3. This means that the upper link 2 and the lower link 3 may be formed by covering the periphery of a metal bar with a resin cover. At this time, if the rigidity of the stick 5 is higher than the metal of the bar used for the upper link 2 and the lower link 3, the durability is improved. If weight reduction is emphasized, it is preferable to form the lower link 3, for example, of stainless steel and the stick 5, for example, of a metal such as aluminum.

[0022] A seating portion 6 that covers the buttocks of the human body when worn on the human body is attached to the upper link 2. A below-knee support portion 7 that covers below the knees of the human body when worn on the human body is attached to the lower link 3. Further, an ankle fixing portion 8 is detachably connected to the lower link 3 (stick 5) by a connecting portion 10. This ankle fixing portion 8 is wound around the ankle of the human body. Therefore, the stick 5 and the ankle fixing portion 8 are connected at the ankle portion of the human body. Note that the stick 5 and the ankle fixing portion 8 may be fixedly connected by the connecting portion 10 so as not to be detachable.

[0023] The ankle fixing part 8 has a moving mechanism part 9, and this moving mechanism part 9 is for relatively moving the position of the ankle fixing part 8 with respect to the lower link 3 (stick 5). In other words, when the moving mechanism part 9 acts, the protruding length of the stick 5 downward from the ankle fixing part 8 changes. The moving mechanism part 9 is for changing the protruding length of the stick 5 from the ankle fixing part 8. In order to realize the walking mode described later, the lower end (grounding part 5a) of the lower link 3 (stick 5) can be located at least above the sole of the wearer's (human body) foot, and in order to realize the sitting mode described later, the grounding part 5a can be located at least on the same plane as the sole of the foot.

[0024] The seating device of the present invention having a pair of the appliance main bodies 1 with the above-described structure is worn on the human body as follows, for example. First, the ankle fixing part 8 that has been removed from the stick 5 in advance is wound around and fixed to the ankle. The ankle fixing part 8 may be a belt formed of rubber or the like, or may be a resin-made cylindrical shape. In short, any structure may be used as long as it has a structure that covers the ankle and does not come off from the ankle. When winding the ankle fixing part 8 around the ankle, it is convenient if the ankle fixing part 8 is detachable from the stick 5 because it is done while bending. Then, the upper link 2 is arranged along the thigh so that the seating part 6 is in a position to cover the buttocks. In the example of the figure, since the belt 11 extends from the seating part 6 toward the upper link 2, the upper link 2 is fixed to the human body by winding this belt 11 around the upper side of the thigh. Further, the lower knee support part 7 is arranged in a position to cover the lower knee and the lower link 3 is arranged along the lower leg. In the example of the figure, since the belt 12 extends from the lower knee support part 7 toward the lower link 3, the lower link 3 is fixed to the human body by winding this belt 12 around the back side of the lower knee. Also, in the example of the figure, the belt 18 is fixed to the upper link 2, and the upper link 2 is fixed to the thigh by winding this belt 18 around the upper knee.

[0025] Furthermore, the stick 5 and the ankle fixing part 8 are connected by the connecting part 10 and fixed to each other. By wearing such a fixture body 1 on both feet, the seating fixture is worn on the human body. In the above description, an example is shown in which the fixture body 1 is worn along the leg at four locations: the belt 11, the belt 12, the belt 18, and the connecting part 10. However, it may be fixed to the human body only with the belt 12 (or the belt 18) and the connecting part 10, or it may be fixed to the human body by slightly changing the positions of the belts 11, 12, and 18. Since the legs of the human body bulge at the upper part of the thigh, the knee, and the calf, if there is a belt above this bulging part, it is possible to prevent the fixture body 1 from slipping down. In that sense, the belt 11 is located above the thigh, the belt 12 is located above the calf, and the belt 18 is located above the knee, which contributes to preventing such slippage. The more such fixing parts are added, the more firmly the fixture body 1 is fixed to the human body without tightening the belt. As for preventing the fixture body 1 from slipping down, since the ankle fixing part 8 is received by the instep of the foot, winding the ankle fixing part 8 around the ankle also contributes to this. Also, the order of fixing with the belt 11, the belt 12, the belt 18, and the connecting part 10 can be appropriately changed when wearing on the human body. Since the seating fixture according to the present invention is composed of a pair of fixture bodies 1 formed separately, it can be attached to the left and right legs separately, and the wearability is high. In the example of the figure, the upper link 2 and the lower link 3 are arranged inside the legs of the human body, but a structure in which they are arranged outside may also be used.

[0026] As thus worn on the human body, the seating device, as shown in FIGS. 8 and 9, does not interfere with the wearer's walking motion at all. At this time, since the locking mechanism of joint 4 is off, the upper link 2 and the lower link 3 rotate freely. When joint 4 is in this free state, the seating device provides a walking mode for the wearer. In the walking mode, as the wearer walks forward by alternately bending the knees of the left and right legs, since joint 4 is free, the upper link 2 bends along the thigh and the lower link 3 bends along the lower leg via joint 4 respectively. That is, joint 4 rotates the upper link 2 and the lower link 3 according to the knee bending angle of the wearer during walking. Therefore, during walking, the upper link 2 remains along the thigh and the lower link 3 remains along the lower leg. At this time, the wearer's buttocks are separated from the seating portion 6, and the lower part of the wearer's knees is separated from the lower knee support portion 7, although they may come into contact slightly during walking.

[0027] During the walking mode, the stick 5 has a short protruding length with respect to the ankle fixing portion 8, and the grounding portion 5a is located above the wearer's sole. Therefore, each time the foot touches the ground during walking, the grounding portion 5a does not touch the ground. That is, by setting the length such that the grounding portion 5a does not protrude below the wearer's sole, the tip (grounding portion 5a) of the stick 5 does not touch the ground each time the foot touches the ground during walking. Thereby, unnecessary vibration is not given to the wearer, and it is also possible to prevent the grounding portion 5a from wearing out due to grounding each time the wearer walks. This also contributes to extending the service life of the grounding portion 5a and thus the device body 1. Furthermore, similar to normal walking, only the wearer's sole touches the ground during walking, so the wearer can walk naturally without any discomfort.

[0028] On the one hand, when the locking mechanism is turned on by the operation part 4a of the joint 4, the angle formed by the upper link 2 and the lower link 3 is fixed. When the joint 4 is in the locked state like this, the seating device provides a seating mode for the wearer. When the angle between the upper link 2 and the lower link 3 is fixed, as shown in FIGS. 10 and 11, the wearer's knees are in a slightly bent state. When the wearer lowers their waist in this state, the buttocks come into contact with the seating part 6. When the waist sinks further, the lower knees hit against the lower knee support part 7, and the buttocks come into contact with the seating part 6 and the lower knees come into contact with the lower knee support part 7, and their positions are fixed. Here, if the configuration is such that the angle formed by the upper link 2 and the lower link 3 by the joint 4 can be fixed at 150° to 170°, a seating close to a standing state can be provided. On the other hand, if the configuration is such that the angle formed by the upper link 2 and the lower link 3 by the joint 4 can be fixed at 120° to 140°, a seating close to a semi-reclined state can be provided. Furthermore, if the angle can be fixed smaller, a seating close to the state of sitting on a chair with the waist lowered can be provided. Regarding the angle that can be fixed by the locking mechanism of the joint 4, the wearer can select it as appropriate, and an optimal seating posture can be provided according to the working environment.

[0029] At the same time, the stick 5 protrudes downward with respect to the ankle fixing portion 8, and the grounding portion 5a contacts the ground. That is, even if the wearer places their weight on the seating portion 6, the knees are prevented from bending and falling forward under the support of the lower knee support portion 7 in an unstable state, and the center of gravity is supported not only by their own feet but also by the grounding portion 5a of the stick 5 extending in the axial direction of the lower link 3. As a result, even if the wearer sits down with their waist lowered, they can place their weight in a stable state and maintain their posture on the spot. That is, in the sitting mode, the wearer's buttocks are in close contact with the seating portion 6, the lower knees are in close contact with the lower knee support portion 7, and the soles of the feet and the grounding portion 5a are in contact with the ground. At this time, in order to ensure that the wearer's soles of the feet can reliably contact the ground and the stick 5 can contact the ground, the stick 5 (lower link 3) and the ankle fixing portion 8 are rotatably connected. Since the two are rotatably connected, the wearer can freely bend their own ankles in the front-rear direction regardless of the angle of the stick 5 with respect to the ground, so that the entire sole of the foot can be in contact with the ground and a stable posture can be taken.

[0030] As described above, in the sitting mode, the wearer can sit in a stable state and maintain a comfortable posture. On the other hand, in the walking mode, the wearer can walk normally without any inconvenience. Therefore, in an environment where it is not possible to place a chair for working while sitting, such as in a medical site or a factory, if a worker who has to stand and work for a long time wears this seating device and switches to the sitting mode, they can work while maintaining a comfortable posture as if they were sitting. The present invention can provide a sitting mode to eliminate the hardship of such standing work, and also provide the ability to quickly and freely move by switching to the walking mode when the wearer wants to move from the spot. The present invention was created to provide a state where a person who can normally walk without problems can sit even without a seat such as a chair, and also provide a state where they can walk without any inconvenience from here. Also, in the above example, the pair of device bodies 1 are worn on both feet of the wearer, but it is also possible to wear them on only one foot. For example, when performing an operation by stepping with the foot, since it is preferable that the foot for the operation is free, even if the device body 1 is worn only on the opposite foot, sitting is possible.

[0031] As a moving mechanism part 9 for changing the protruding length of the ankle fixing part 8 of the stick 5, as shown in FIGS. 12 and 13, a compression spring 13 can be used. The moving mechanism part 9 is fixed to the side surface of the ankle fixing part 8. This moving mechanism part 9 has a double cylinder structure and has an outer outer cylinder 14 and an inner inner cylinder 15. A compression spring is disposed between the outer cylinder 14 and the inner cylinder 15. On the upper side of the inner cylinder 15, a pressing piece 15a for covering the upper part of the compression spring 13 is continuously formed and extends. Specifically, the pressing piece 15a extends outward from the upper end of the inner cylinder 15 in a direction orthogonal to the axial direction. On the upper side of the outer cylinder 14, a pressing piece 14a for covering the upper part of the pressing piece 15a is continuously formed and extends inward. Specifically, the pressing piece 14a extends inward from the upper end of the outer cylinder 14 in a direction orthogonal to the axial direction. Thereby, since the position on the upper side of the inner cylinder 15 is defined by the pressing piece 14a, the inner cylinder 15 does not move above the outer cylinder 14.

[0032] On the other hand, on the lower side of the outer cylinder 14, a pressing piece 14b for covering the lower part of the compression spring 13 is continuously formed and extends. Specifically, the pressing piece 14b extends inward from the lower end of the outer cylinder 14 in a direction orthogonal to the axial direction. Thereby, the compression spring 13 is surely accommodated between the outer cylinder 14 and the inner cylinder 15. Note that the pressing piece 14b covers only the lower end of the compression spring 13 and does not cover the lower end of the inner cylinder 15, so the inner cylinder 15 can protrude from the lower end of the outer cylinder 14.

[0033] A connecting portion 15b continuously extends downward from a part of the outer edge of the pressing piece 15a of the inner cylinder 15. The connecting portion 15b is formed in a shape along the inner surface of the outer cylinder 14 and is slidable with respect to the outer cylinder 14. That is, the moving mechanism portion 9 has a compression spring 13 attached to the ankle fixing portion 8, and by biasing this compression spring 13 in the compression direction, the lower link 3 is slidable with respect to the ankle fixing portion 8. The connecting portion 10 described above is arranged below the moving mechanism portion 9, and the connecting portion 15b extends to this connecting portion 10. The lower end of the connecting portion 15b is fixed to the connecting portion 10. A partial notch or through hole is formed in the pressing piece 14b, and the connecting portion 15b protrudes from the lower end of the outer cylinder 14 through this. When wearing the appliance body 1, the compression spring 13 is in a state of acting in the extension direction, and in this state, the connecting portion 15b protrudes from the lower end of the outer cylinder 14.

[0034] In the walking mode, as described above, the position of the appliance body 1 with respect to the wearer is fixed by the belts 11 and 12 or other means. Therefore, as shown in FIG. 12, the relative position between the ankle fixing portion 8 and the stick 5 remains unchanged from when it is worn, the compression spring 13 is in a state of acting in the extension direction, and it is not biased in the compression direction. Thus, as shown in the figure, the pressing piece 15a at the upper end of the inner cylinder 15 is in contact with the pressing piece 14a at the upper end of the outer cylinder 14. When the position of the pressing piece 14a is above the position of the pressing piece 15a in a state where the compression spring 13 is fully extended, the compression spring 13 is fully extended and the inner cylinder 15 is at the maximum upward position. In any case, since the inner cylinder 15 is located on the upper side, the protruding length of the stick 5 downward with respect to the ankle fixing portion 8 is in a state of being minimized. In this short state, as described above, the grounding portion 5a is at a position above (higher than) the position of the wearer's sole.

[0035] In the sitting mode, as described above, since the weight of the wearer is applied, a downward load is applied to the stick 5 via the lower link 3. Therefore, a downward force is also applied to the connecting portion 15b via the connecting portion 10. At the same time, the pressing piece 15a biases the compression spring 13 in the compression direction, the compression spring 13 contracts, and the inner cylinder 15 moves downward together with the connecting portion 15b. That is, just by placing the weight on the seating portion 6, the stick 5 automatically moves downward relative to the ankle fixing portion 8 by the weight of the wearer. Eventually, the grounding portion 5a hits the ground, and the position of the stick 5 in the sitting mode is determined there. If the protruding length of the stick 5 relative to the ankle fixing portion 8 can be increased by its own weight in this way, there is no need to separately perform the extension operation of the stick 5, which is convenient to use. For example, a mechanism may be provided such that the stick 5 protrudes downward relative to the ankle fixing portion 8 in conjunction with an operation portion 4a for operating the lock mechanism of the joint 4. Further, not limited to the compression spring 13, a member that expands and contracts may be interposed between the connecting portion 10 and the ankle fixing portion 8 to further increase the degree of freedom of movement of the foot.

[0036] Note that a protrusion 16 is formed to protrude from the lower end of the connecting portion 15b. The stick 5 is formed with a receiving hole 17 for receiving and fitting the protrusion 16. A groove 16a continuous in the circumferential direction is formed in the protrusion 16, and a protruding portion 17a protruding inward at the tip of the receiving hole 17 is fitted into this groove. Therefore, the protrusion 16 is made of an elastic material, and it may be allowed to enter the receiving hole 17 beyond the protruding portion 17a, or it may be a mechanism that mechanically expands the diameter of the receiving hole 17 including the protruding portion 17a once to receive and fit the tip of the protrusion 16. By fitting the protrusion 16 into the receiving hole 17 in this way, the protruding portion 17a moves in the circumferential direction along the groove 16a. As a result, the stick 5 and the ankle fixing portion 8 rotate relative to each other via the connecting portion 10. That is, the lower link 2 (stick 5) and the ankle fixing portion 8 are rotatably connected. Thereby, in the sitting mode described above, the wearer can freely bend the ankle in the front-rear direction. Note that connecting the two rotatably in this way also allows the wearer to freely bend the ankle in the front-rear direction during the walking mode, thus providing ease of walking.

Description of Reference Numerals

[0037] 1: Brace main body, 2: Upper link, 3: Lower link, 4: Joint, 4a: Operation portion, 5: Stick, 5a: Ground contact portion, 6: Seating portion, 7: Below-knee support portion, 8: Ankle fixing portion, 9: Movement mechanism portion, 10: Connecting portion, 11: Belt, 12: Belt, 13: Compression spring, 14: Outer cylinder, 14a: Pressing piece, 14b: Pressing piece, 15: Inner cylinder, 15a: Pressing piece, 15b: Connecting portion, 16: Protrusion, 16a: Groove, 17: Receiving hole, 17a: Protruding portion, 18: Belt

Claims

1. A seating device comprising a fixture body formed as a separate body that extends along a human leg and is to be attached to the leg, wherein the fixture body includes an upper link that is to extend mainly along the thigh of the human leg, a lower link that is disposed below the upper link and is to extend mainly along the lower leg of the human leg, a joint that rotatably connects the upper link and the lower link and can fix the angle between them, a seating portion attached to the upper link and covering the buttocks of the human body, a below-knee support portion attached to the lower link and covering below the knees of the human body, a stick that extends downward as a part of the lower link and is disposed at a position corresponding to at least the lower side of the human ankle, an ankle fixing portion connected to the stick and to be wound around the human ankle, and a movement mechanism portion for changing the protruding length of the stick downward from the ankle fixing portion. The seating device is characterized by this.

2. The seating device according to claim 1, wherein the stick is formed of a material having higher rigidity than the lower link.

3. The seating device according to claim 1, wherein the stick and the ankle fixing portion are rotatably connected.

4. The seating device according to claim 1, wherein the stick and the ankle fixing portion are detachably connected.

5. The seating device according to claim 1, wherein the movement mechanism portion has a compression spring attached to the ankle fixing portion, and the stick is slidable relative to the ankle fixing portion by biasing the compression spring in the compression direction.

Images