JP2016083100A - Joint lock device for foot orthosis - Google Patents

Abstract

A joint locking device for a foot orthosis that reliably reproduces a joint angle is provided.
A joint lock device for a foot orthosis is a joint lock device for fixing a joint angle between a footrest unit 2 and a crus 3, and is connected to a rotation shaft of the footrest unit 2. The rotating body 41 having the blade part 41b that rotates in conjunction with the change in the joint angle of the footrest unit 2 and the stopper pin that restricts the rotation of the rotating body 41 by having one end abutting against the blade part 41b. 51 and a stopper pin fixing part 52a for locking / unlocking the stopper pin 51 with respect to the crus part 3.
[Selection] Figure 1

Description

  The present invention relates to a joint lock device that is used in a foot orthosis and fixes an ankle joint angle.

  Conventionally, there is JP, 2014-054526, A as a technique of such a field. The foot orthosis described in this publication is composed of an upper part to be attached to the thigh and a lower part to be attached to the crus. The upper part consists of two struts that merge at the front of the lower leg while branching from the entire surface of the thigh to both sides of the thigh. In addition, at the lower part of the foot orthosis, a lower end portion branched from the front surface of the crus part to both side surfaces of the crus part and a portion corresponding to the stirrup ankle joint are connected via an articulated joint for ankle. . In this foot orthosis, the upper connecting portion and the lower connecting portion are connected so that their positions can be adjusted in the vertical direction. Accordingly, the foot orthosis can be easily fitted to the user and worn.

JP 2014-054526 A

In the conventional foot orthosis described above, a joint that can fix the ankle joint at a specified position while restricting the range of motion of the ankle joint to operate within the specified range is used as the joint joint for the foot. In general, as such a joint, a double crenzac joint that uses two screws to fix the angle of the ankle is used. However, since the angle of the ankle joint changes depending on the degree of screw tightening in the double crenzac type joint, there is a problem that the reproducibility of the joint angle is poor when the foot orthosis is used multiple times.
An object of the present invention is to provide a joint locking device for a foot orthosis that reliably reproduces a joint angle.

A locking device for a foot orthosis according to the present invention is a joint locking device for fixing a joint angle between a footrest unit and a crus, and is connected to a rotation shaft of the footrest unit, A rotating body having a blade portion that rotates in conjunction with a change in the joint angle of the footrest unit, a stopper pin that restricts the rotation of the rotating body by contacting one end portion with the blade portion, and the stopper pin And a stopper pin fixing portion for locking / unlocking the lower leg.
Thereby, the same joint angle can be easily reproduced by applying the stopper pin having the same length.

  As a result, it is possible to provide a joint locking device for a foot orthosis that reliably reproduces the joint angle.

It is a perspective view of the foot orthosis which fixed the joint angle by the stopper pin concerning Embodiment 1. FIG. It is a perspective view of the foot orthosis from which the stopper pin concerning Embodiment 1 was extracted. FIG. 3 is a perspective view illustrating a joint adjustment unit according to the first embodiment. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 1 according to the first embodiment. 3 is a flow chart for adjusting a joint angle according to the first embodiment; It is a perspective view which shows the frame part concerning Embodiment 2, and a stopper pin fixing | fixed part. It is a perspective view which shows the state before insertion of the stopper pin concerning Embodiment 2. FIG. It is a perspective view which shows the state after insertion of the stopper pin concerning Embodiment 2. FIG.

[Embodiment 1]
Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the foot orthosis 1 includes a footrest unit 2 that contacts the floor, a crus 3 that is fixed to the user's crus, and ankles on the inside and outside of the user. A joint adjustment unit 4 that connects the footrest unit 2 and the crus 3 in the vicinity is provided.

  The footrest unit 2 includes a placement portion 21 on which a user's foot is placed, and a first connecting portion 22 that extends upward from the left and right sides of the placement portion 21. The lower side of the mounting portion 21 is planar and is grounded to the floor surface. Further, typically, the placement portion 21 has a shape close to the shape of the sole of the user. The lower end portion of the first connecting portion 22 is connected to both side portions on the rear side of the placement portion 21.

  The lower leg part 3 includes a fixing part (not shown) for fixing the user's lower leg and the foot orthosis 1, and a second connecting part 31 connected to the upper end of the joint adjusting part 4. For example, the fixing portion is a belt that goes around the user's lower leg, and the foot brace 1 is fixed to the user by fastening the lower leg with the belt. In addition, the method of fixing the lower leg part 3 to a user is not restricted to said method.

  As shown in FIGS. 3 and 4, the joint adjusting unit 4 includes a frame 40 and a rotating body 41 that is provided in the frame 40 and has a rotating shaft that rotates in conjunction with the inclination angle of the footrest unit 2. , A third connecting portion 42 that is connected to the lower leg 3 in a vertically slidable state, a stopper pin 51 that restricts rotation of the rotating body 41, and a lock portion 52 that fixes the stopper pin 51. And comprising.

  In the front portion of the frame portion 40, two hole portions 40a and 40b formed so as to penetrate the frame portion 40 are formed at two locations on the upper and lower sides. Here, the holes 40 a and 40 b are formed at positions where the tip of the stopper pin 51 contacts the blade 41 b of the rotating body 41 when a stopper pin 51 described later is inserted. An insertion portion 40c is formed between the hole 40a and the hole 40b. A connection pin 52b described later is inserted into the insertion portion 40c.

  The rotating body 41 enables locking and unlocking of the cylindrical rotating main body 41a, the blade portion 41b provided so as to protrude from the outer periphery of the rotating main body 41a, and the footrest unit 2 adjustable in the vertical direction. A quick lever 41c.

  An upper end portion of the first connecting portion 22 of the footrest unit 2 is connected to the rotating body 41a. Here, the rotating body 41a and the first connecting portion 22 of the footrest unit 2 are connected by a connecting pin (not shown) penetrating the rotating body 41a. The connecting pin is connected to the quick lever 41c.

  When the operation of tilting the quick lever 41c is performed, the connection between the rotating body 41 and the first connecting portion 22 is released, and the position of the footrest unit 2 with respect to the rotating body 41 can be displaced in the vertical direction. On the contrary, when the user raises the quick lever 41c, the rotary body 41 and the first connecting portion 22 are locked, so that the rotary body 41 and the footrest unit 2 move up and down. Is in a fixed state.

  The two blade portions 41b are provided at diagonal positions on the outer periphery of the rotating body 41a. The two blade portions 41b are arranged in the frame portion 40 so that one is on the upper side and the other is on the lower side. At this time, the shape of the two blade portions 41b is a shape warped in a bow shape such that end portions formed of curved surfaces protrude forward. Thereby, even if it is a case where the rotary body 41 rotates and the arrangement | positioning of the blade | wing part 41b is displaced, the edge part of the stopper pin 51 and the edge part of the blade | wing part 41b will be in the point contact state.

  The 3rd connection part 42 is provided in the upper part of the joint adjustment part 4, and is connected with the 2nd connection part 31 provided in the leg part 3 in the state which can be slid to an up-down direction. By sliding the third connecting part 42 and the second connecting part 31, the length of the lower leg part 3 can be adjusted according to the length of the user's lower leg.

  The stopper pin 51 has a columnar shaft portion 51a and a head portion 51b formed with a diameter larger than the diameter of the shaft portion 51a at the end of the shaft portion 51a. The stopper pin 51 locks the rotation of the rotating body 41. Specifically, the stopper portions 51 are inserted into the holes 40 a and 40 b from the front of the shaft portions 51 a of the two stopper pins 51, and the tips of the stopper pins 51 are connected to the blade portions 41 b of the rotating body 41 provided in the frame portion 40. Contact. Furthermore, when the head 51b of the stopper pin 51 is fixed by the lock portion 52, the rotating body 41 is locked so as not to rotate in any direction. Here, since the rotation of the rotary body 41 and the footrest unit 2 is interlocked, the rotation of the rotary body 41 is locked by the stopper pin 51, whereby the rotation of the footrest unit 2 is locked. Thereby, the stopper pin 51 is substantially fixed to the lower leg part 3 by the lock part 52.

  The lock portion 52 includes a plate-like stopper pin fixing portion 52a that contacts the head 51b of the stopper pin 51, a connecting pin 52b that penetrates the stopper pin fixing portion 52a, and a state in which the stopper pin fixing portion 52a is fixed. A quick lever 52c for switching between a state in which the stopper pin fixing portion 52a is unlocked so that the stopper pin fixing portion 52a is rotatable and a rotation is switched.

  The stopper pin fixing portion 52a is a rotatable rectangular plate. The stopper pin fixing portion 52a is rotated about the connecting pin 52b, so that the stopper pin 51 is in contact with the head 51b of the stopper pin 51 and the non-contact position of the stopper pin 51 not in contact with the head 51b. Displace at. Here, the stopper pin fixing portion 52a having the long side extending in the vertical direction and the short side extending in the horizontal direction is the set position, and the long side of the stopper pin fixing portion 52a is The non-set position is a state where the short side extends in the up-down direction and extends in the left-right direction. Further, a connecting pin 52b passes through the stopper pin fixing portion 52a, and a quick lever 52c is connected to one end of the connecting pin 52b disposed outside the frame portion 40.

  A connecting pin fixing portion 52d is connected to the other end of the connecting pin 52b disposed inside the frame portion 40. The connecting pin fixing portion 52d is a flat plate arranged in parallel with the stopper pin fixing portion 52a. When the user performs an operation of raising the quick lever 52c, the connecting pin 52b is pulled forward and the stopper pin fixing portion 52a is pressed backward. Thereby, the force which pinches | interposes the frame part 40 with the stopper pin fixing | fixed part 52a and the connection pin fixing | fixed part 52d is added, and the stopper pin fixing | fixed part 52a will be in the fixed state. On the other hand, when the user performs an operation of tilting the quick lever 52c, the space between the connecting pin fixing portion 52d and the stopper pin fixing portion 52a widens, so that the stopper pin fixing portion 52a is fixed. It will be released and it will be in the state which can rotate, and change with a contact position and a non-contact position will become free.

  Next, a procedure for adjusting the joint angle of the ankle of the foot orthosis 1 will be described with reference to FIG.

  The user operates the quick lever 52c to open the stopper pin fixing portion 52a (S1). Thereby, the stopper pin fixing | fixed part 52a will be in the state which can be rotated.

  The user rotates the stopper pin fixing portion 52a to change it to the non-contact position (S2). As a result, the stopper pin 51 can be removed from the holes 40a and 40b.

  The user pulls out the stopper pin 51 (S3). As a result, the stopper pin 51 is released from the state in which the blade 41b of the rotating body 41 is in contact with the rotating body 41, and the rotating body 41 can be rotated. Moreover, since rotation of the rotary body 41 and the footrest unit 2 is interlocked, the footrest unit 2 freely rotates when the rotary body 41 can be rotated.

  The user selects the stopper pin 51 necessary to determine the movable range of the rotating body 41 (S4). The rotation angle of the footrest unit 2 is determined by the lengths of the two stopper pins 51 selected here.

  The user inserts the selected stopper pin 51 into the holes 40a and 40b (S5). Thereby, the tip of the stopper pin 51 comes into contact with the blade portion 41 b of the rotating body 41.

  The user rotates the stopper pin fixing portion 52a to the contact position (S6). Thereby, the head 51b of the stopper pin 51 and the stopper pin fixing portion 52a come into contact with each other.

  The quick lever 52c is operated to fix the stopper pin fixing portion 52a (S7). Thereby, the stopper pin fixing | fixed part 52a prevents the stopper pin 51 from detaching, and a rotation state is maintained. Thereby, the adjustment work of the joint angle of the ankle is completed.

  Thereafter, the user performs rehabilitation (S8). Thereafter, when readjustment is necessary, the process returns to S1 and an ankle joint angle adjustment operation is performed as necessary.

  By selecting the length of the stopper pin 51, a certain joint angle can be easily reproduced. That is, in a double crenzac type joint, the joint angle of the ankle changes depending on the tightening of the screw, so that it is difficult to reproduce a constant joint angle. However, according to the present embodiment, a constant stopper pin is used. By applying 51, since the joint angle of the ankle can be kept constant, it is possible to greatly reduce the time and effort required for the user to adjust the joint angle. Therefore, even when the foot orthosis 1 is used by a plurality of users, for example, if the length of the stopper pin 51 is determined for each user, the joint angle corresponding to the user can be reproduced.

  In addition, it is necessary to adjust the joint angle of the ankle according to the progress of the user's rehabilitation, but by changing the length of the stopper pin 51, The joint angle of the mounting unit 2 can be easily adjusted.

  Furthermore, in the double crenzac type joint, it is necessary to perform an operation of changing the tightening degree of the screw by using a dedicated tool, but a dedicated tool is not necessary for the replacement of the stopper pin 51 according to the present embodiment. The joint angle of the footrest unit 2 can be easily adjusted.

[Embodiment 2]
Next, the foot orthosis 6 according to the second embodiment will be described. In addition, the same code | symbol is attached | subjected about the structure goods which show | play the function similar to the foot orthosis 1 shown in Embodiment 1, and description is abbreviate | omitted.

  As shown in FIG. 6, the joint adjustment unit 7 includes a frame 70, a rotating body 41 that is provided in the frame 70 and has a rotation shaft that rotates in conjunction with the inclination angle of the footrest unit 2, and the lower leg And a third connecting portion 42 that is connected to the portion 3 in a slidable state in the vertical direction.

  Two insertion portions 70 a and 70 b are formed at the front portion of the frame portion 70 so as to penetrate the frame portion 70. The insertion portions 70a and 70b are formed side by side on the front portion of the frame portion 70, and the stopper pins 81 are inserted into the insertion portions 70a and 70b, respectively. A long groove portion 70c is formed in the middle of the insertion portions 70a and 70b. In a state where the tip of the stopper pin 81 is in contact with the blade portion 41b, a substantially rectangular parallelepiped stopper pin fixing portion 81c provided in the shaft portion 81a of the stopper pin 81 is inserted into the long groove portion 70c.

  The long groove portion 70c has such a size that the stopper pin fixing portion 81c can freely rotate when the stopper pin 81 is rotated in a state where the stopper pin fixing portion 81c is inserted. The insertion portions 70a and 70b are long in the lateral direction in order to insert the stopper pin fixing portion 81c having an elongated shape up to the long groove portion 70c. In addition, the inner side direction of the frame portion 70 of the insertion portions 70a and 70b is hole-shaped, and is formed with a diameter substantially the same as the diameter of the stopper pin 81 so that the distal end side of the stopper pin 81 can penetrate.

  The stopper pin 81 is provided with a cylindrical shaft portion 81a, a head portion 81b formed with a diameter larger than the diameter of the shaft portion 81a at the end of the shaft portion 81a, and a part of the outer periphery of the shaft portion 81a. And a stopper pin fixing portion 81c that fixes the stopper pin 81 by fitting with the long groove portion 70c.

  The stopper pin fixing portion 81c is formed in a substantially rectangular parallelepiped direction that is perpendicular to the direction in which the shaft portion 81a extends. Further, the thickness of the stopper pin fixing portion 81c is substantially the same as the width of the long groove portion 70c.

  Next, a method of fixing the stopper pin 81 and a method of releasing from the fixed state using the fitting between the stopper pin fixing portion 81c and the long groove portion 70c will be described.

  As shown in FIG. 7, the user inserts the stopper pin 81 into the insertion portion 70a. At this time, the stopper pin fixing portion 81c is inserted in a laid state. The insertion portion 70a is wide open in the lateral direction, and is inserted with the long side direction of the stopper pin fixing portion 81c aligned with the long side of the insertion portion 70a. As a result, the stopper pin fixing portion 81c reaches the long groove portion 70c. When the stopper pin fixing portion 81c reaches the long groove portion 70c, the head portion 81b comes into contact with the outer surface of the frame portion 70.

  As shown in FIG. 8, the user rotates the stopper pin 81 by 90 degrees. As a result, the stopper pin fixing portion 81c rises from the sideways state. Therefore, the stopper pin fixing portion 81c is fitted with the long groove portion 70c, and the stopper pin 81 is locked.

  At this time, the tip of the stopper pin 81 arranged on the frame portion 40 contacts the blade portion 41b of the rotating body 41 and locks the rotating body 41 so as not to rotate. Here, since the rotation of the rotating body 41 and the rotation of the footrest unit 2 are linked, the angle of the footrest unit 2 can be fixed.

  Similarly, when the stopper pin fixing portion 81c is rotated 90 ° in a state where the stopper pin 81 is inserted into the insertion portion 70a, the stopper pin 81 can be unlocked by the stopper pin fixing portion 81c. Thereby, the stopper pin 81 can be extracted from the insertion part 70a.

  At this time, the blade portion 41b of the rotating body 41 can freely rotate. Since the rotation of the rotating body 41 and the rotation of the footrest unit 2 are linked, the angle of the footrest unit 2 can be freely adjusted.

  Although the case where the stopper pin 81 is inserted and removed from the insertion portion 70a has been described, the same applies to the case where the stopper pin 81 is inserted into the insertion portion 70b.

  Thereby, a structure can be simplified, without employ | adopting the lock part 52 of 1st Embodiment. Further, since the stopper pin fixing portion 81c is accommodated in the frame portion 40, the visibility of the presence or absence of the stopper pin 81 is improved, and the angle adjustment by the user is facilitated.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, the hole portions 40 a and 40 b and the insertion portion 40 c have been described as being formed at the front portion of the frame portion 40, but a structure formed at the rear portion of the frame portion 40 may be used.

DESCRIPTION OF SYMBOLS 1 ... Foot orthosis, 2 ... Foot rest unit, 3 ... Lower leg part, 4 ... Joint adjustment part, 6 ... Foot orthosis, 7 ... Joint adjustment part, 21 ... Mounting part, 22 ... 1st connection part, 31 ... 2nd connection part, 40 ... frame part, 40a, 40b ... hole part, 40c ... insertion part, 41 ... rotating body, 41a ... rotating body, 41b ... blade part, 41c ... quick lever, 42 ... 3rd connection part 51 ... Stopper pin, 51a ... Shaft part, 51b ... Head part, 52 ... Lock part, 52a ... Stopper pin fixing part, 52b ... Connecting pin, 52c ... Quick lever, 52d ... Connecting pin fixing part, 70 ... Frame part, 70a, 70b ... insertion part, 70c ... long groove part, 81 ... stopper pin, 81a ... shaft part, 81b ... head part, 81c ... stopper pin fixing part

Claims (1)

A joint locking device for fixing the joint angle between the footrest unit and the lower leg,
A rotating body connected to the rotation shaft of the footrest unit and having a blade portion that rotates in conjunction with a change in the joint angle of the footrest unit;
A stopper pin that regulates the rotation of the rotating body by having one end abutting against the blade,
A stopper pin fixing portion for locking / unlocking the stopper pin with respect to the lower leg, and a stopper pin fixing portion.
Joint lock device for foot orthosis.

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