JP2001046441A - Telescopic locking mechanism for use with wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a telescopic locking mechanism easy to operate and quickly and accurately adjustable to a desired length. SOLUTION: This locking mechanism 30 steplessly supports a footrest stay 21 at a certain position. In this case, the locking mechanism 30 includes: an outer hollow member 31; an inner hollow member 32; a core member axially movably provided in the center of the inside of the inner hollow member 32; a movable member 35 provided on the core member to move axially along with the core member; a pair of braking members rotating about a central shaft provided in the core member, with their tips abutting on or moving away from the inner surface of the outer hollow member 31 as the movable members 35 moves; an energizing member for energizing the movable member 35 so that the braking members are rotated at all times in the direction to abut on the inner surface of the outer hollow member 31; and an operating part 39 provided on the inner hollow member 32 for operating the movable member 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic lock mechanism for continuously supporting a foot stay, an armrest, a back, a handle, and a footrest constituting a wheelchair at arbitrary positions.

[0002]

2. Description of the Related Art Conventionally, a footrest, an armrest, a back,
Various lock mechanisms have been proposed as a lock mechanism for supporting the handle and the foot rest at arbitrary positions. Among them, generally, an outer hollow member, an inner hollow member movably inserted in the outer hollow member in the length direction, and an outer hollow member for fixing the inner hollow member and the outer hollow member to each other. In some cases, a bolt-shaped tightening member is screwed into a screw hole formed in a side portion of the member, and the distal end of the tightening member abuts on a concave portion formed in the inner hollow member to be fixed.

[0003]

However, in the lock mechanism configured as described above, one of the hollow members is gripped with one hand, and the length is adjusted while loosening the tightening member with the other hand. In order to perform the work, it takes time and effort to adjust the length, and furthermore, it is necessary to operate with both hands, which is very difficult to use.

[0004] Further, in order to fix to a desired length, it is necessary to tighten a tightening member. Therefore, when performing the tightening operation, the length often deviates from the desired length. However, there is a problem that the length cannot be adjusted accurately.

Accordingly, the present invention has been made in view of such problems existing in the prior art, and an object of the present invention is to make it easy to operate, adjust quickly and accurately to a desired length. It is an object of the present invention to provide a telescopic locking mechanism.

[0006]

Means for Solving the Problems To solve the above,
Means adopted by each of the present invention will be described with reference numerals used in the embodiment. The invention according to claim 1 has one end provided on the body frame 10 of the wheelchair, and the other end turned around the main body frame 10. An outer hollow member 31 and the outer hollow member 31 are provided on a freely movable footrest 21 and are provided with a telescopic locking mechanism 30 that supports the footrest 21 at any position in a stepless manner. An inner hollow member 32 movably inserted into the inner hollow member 32; a core member 33 provided at an inner center of the inner hollow member 32 and movably provided in the axial direction; A movable member 35 that moves in the axial direction together with the core member 33, and a central shaft 3 provided on the core member 33;
8 about the movable member 35
A pair of braking members 34a, 34b whose leading ends contact or separate from the inner peripheral surface of the outer hollow member 31 with the movement of
The braking members 34a, 34b are always connected to the outer hollow member 31.
A biasing member 36 for biasing the movable member 35 to rotate in a direction to contact the inner peripheral surface of the inner hollow member 3
2 and an operation section 39 for operating the movable member 35.

Next, the invention according to claim 2 is characterized in that one end is provided on a body frame 10 of a wheelchair, and the other end is provided on a back frame 40 rotatably provided on the body frame 10, An outer hollow member 31, an inner hollow member 32 movably inserted into the outer hollow member 31, and an inner hollow member 32 are provided on the premise of a telescopic locking mechanism 30 that supports the frame 40 at any position in a stepless manner. A core member 33 provided at the center of the inside and movably in the axial direction; a movable member 35 provided on the core member 33 and moving in the axial direction together with the core member 33; Central shaft 3 provided on member 33
8 about the movable member 35
A pair of braking members 34a, 34b whose leading ends contact or separate from the inner peripheral surface of the outer hollow member 31 with the movement of
The braking members 34a, 34b are always connected to the outer hollow member 31.
A biasing member 36 for biasing the movable member 35 to rotate in a direction to contact the inner peripheral surface of the inner hollow member 3
2 and an operation section 39 for operating the movable member 35.

Next, the invention according to claim 3 is based on a telescopic lock mechanism 30 for continuously supporting an armrest 50 provided on at least one side of the body frame 10 in a wheelchair at an arbitrary position. The inner hollow member 32 provided with the armrest portion 50, the outer hollow member 31 provided in the main body frame 10 and into which the inner hollow member 32 is movably inserted, and the inner center of the inner hollow member 32 Core member 3 provided and provided movably in the axial direction
3 and both pivot about a central axis 38 provided on the core member 33, and the distal end side is the inner peripheral surface of the outer hollow member 31 as the core member 33 moves in the axial direction. Pair of braking members 34a, 34b that come into contact with or separate from
And the core member 33 provided on the core member 33
And a biasing member 36 for biasing the movable member 35 so as to rotate the braking members 34a and 34b in a direction in which the braking members 34a and 34b normally contact the inner peripheral surface of the outer hollow member. And an operation section 39 provided on the inner hollow member 32 to operate the movable member 35.

Next, the invention according to a fourth aspect of the present invention is directed to a handle 6 provided at both ends of an upper edge of a back frame 40 in a wheelchair.
The inner hollow member 32 provided with the handle portion 60 and the back frame 40 are provided, and the inner hollow member 32 is movable, assuming the telescopic lock mechanism 30 that supports the 0 at any position in a stepless manner. And a metal core member 33 provided at the inner center of the inner hollow member 32 and movably in the axial direction.
And both pivot about a central shaft 38 provided on the core member 33, and the distal end portion is moved to the inner peripheral surface of the outer hollow member 31 as the core member 33 moves in the axial direction. A pair of braking members 34a, 34b that contact or separate,
A movable member 35 provided on the metal core member 33 and moving in the axial direction together with the metal core member 33; and a rotating direction in which the braking members 34a and 34b are always in contact with the inner peripheral surface of the outer hollow member 31. The gist is that a biasing member 36 for biasing the movable member 35 and an operation portion 39 provided on the inner hollow member 32 to operate the movable member 35 are provided. .

Next, a fifth aspect of the present invention is a telescopic lock mechanism 30 for continuously supporting a footrest 23 provided at the tip of a footrest 21 in a wheelchair at an arbitrary position.
And an inner hollow member 32 provided with the footrest portion 23, and an outer hollow member 31 constituting the footrest stay 21 and into which the inner hollow member 32 is movably inserted. A core member 33 provided at the center of the inside of the inner hollow member 32 and movably in the axial direction, and both pivot about a central axis provided on the core member 33, and A pair of braking members 34 a, 34 of which the tip ends contact or separate from the inner peripheral surface of the outer hollow member 31 with the movement of the cored bar member 33 in the axial direction.
b, provided on the core member 33 and the core member 3
A movable member 35 that moves in the axial direction together with the movable member 3; and a movable member 35 that rotates the braking members 34a and 34b in a direction in which the braking members 34a and 34b normally contact the inner peripheral surface of the outer hollow member 31.
The gist of the present invention is that an urging member 36 for urging the movable member 35 is provided, and an operating portion 39 provided on the inner hollow member 36 to operate the movable member 35 is provided.

Finally, the invention according to claim 6 is based on claim 1.
The operation part 39 according to any one of claims 1 to 5, wherein the long hole 3 extending in the axial direction is provided in a portion of the inner hollow member 32 facing each other.
The main point is that the movable member 35 is formed so as to protrude from the elongated hole 32a.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a telescopic locking mechanism in a wheelchair according to the present invention will be described. However, this is a typical example, and unless it exceeds the gist thereof, the following embodiment will be described. The present invention is not limited.

FIG. 1 shows an embodiment of the present invention.
One embodiment of a telescopic locking mechanism 30 for supporting a foot stay in a continuous manner at an arbitrary position is shown. Body frame 1
0, a pair of front wheels 11 and a rear wheel 12 are respectively mounted on the shaft. The footrest 20 includes a footrest 21 pivotally supported by the main body frame 10 and the footrest 21. The pad 22 is rotatably loosely fitted to the user and supports the calf of the user, and the footrest 23 is rotatably supported by the tip of the footrest 21 and supports the sole of the user. ing. An extensible lock mechanism 30 composed of an inner hollow member 32 movably inserted into an outer hollow member 31 described later is pivotally supported between the base end side of the footrest stay 21 and the main body frame 10. ing.

Next, the main body frame 10, the footrest 21 and the telescopic lock mechanism 30 constructed as described above.
2 will be described with reference to FIG. The base end of the foot stay 21 is
The support member 13 having a U-shaped cross section fixed to the
It is pivotally supported via a nut, and a bolt fixed to the center of the outer hollow member 31 is rotatably supported by a cylindrical support member 14 fixed to the main body frame. Further, a support member 15 having a substantially L-shaped cross section is fixed to a distal end portion of the inner hollow member 32 by a double nut,
The longitudinal side of the support member 15 is pivotally supported on the base end side of the foot stay 21 via bolts and nuts.

Next, the structure of the telescopic lock mechanism 30 for supporting the foot stay 21 will be described with reference to FIG. Each of the outer hollow member 31 and the inner hollow member 32 is formed in a hollow shape from a steel material or the like, and the outer surface thereof is subjected to a surface treatment such as painting or plating. And
A core metal member 33 is movably provided in the center of the inner hollow member 32 and in the axial direction. As shown, the inner hollow member 32 is provided with a movement guide member 37 formed in a substantially T-shape. At the center of the movement guide member 37, an insertion hole 33a into which the cored bar member 33 is inserted is formed.

The inside of the inner hollow member 32 and the core member 3
A movable member 35 formed in a rod shape from a synthetic resin or the like is provided between the core member 33 and the movable member 35. The movable member 35 is inserted into the core member 33 in a direction perpendicular to the axial direction. The operating portion 39 provided on the inner hollow member 32 is configured such that both ends of the movable member 35 slightly protrude from the elongated holes 32 a formed at the opposing portions of the inner hollow member 32. Between the movable member 35 and the movement guide member 37,
A spring 36 described as an urging member in the claims is provided, and is normally urged in a direction to push up the movable member 35 by the elastic force of the spring 36.

A center shaft 38 is provided at the end of the metal core member 33. A pair of braking members 34a, 34a, both of which rotate around the center shaft 38 and whose front ends are relatively close to or separated from each other. 34b are provided. The braking member 34
The a and b are configured such that the distal end portion abuts or separates from the inner peripheral surface side of the outer hollow member 31 as the cored bar member 33 moves in the axial direction. That is, as shown in the figure, one of the braking members 34a
7 is rotatably supported on one surface, and the other braking member 34
b is also rotatably supported by the other surface of the movement guide member 37 in the middle thereof so as to be substantially V-shaped as viewed in the drawing.

Therefore, both long holes 32a of the inner hollow member 32
When the movable member 35 protruding from is not operated,
Since the movable member 35 is urged in a direction in which the movable member 35 is pushed up by the elastic force of the spring 36, the core metal member 33 provided integrally with the movable member 35 is also pulled upward,
In conjunction with this, the distal ends of the braking members 34a and 34b abut on the inner peripheral surface of the outer hollow member 31, and the inner hollow member 32 and the outer hollow member 31 are locked to each other (see FIG. 3). .

On the other hand, in order to release the lock, as shown in FIG. 4, if the movable member 35 is pulled down and moved in the direction of the arrow shown in FIG. Moved together with the gold member 33, the leading ends of the respective braking members 34 a and 34 b are separated from the inner peripheral surface of the outer hollow member 31 in conjunction therewith. Therefore, the inner hollow member 32 can freely move in the length direction with respect to the outer hollow member 31, and the length can be freely adjusted.

After the length is adjusted, if the above-mentioned pulling down of the movable member 35 is released, the movable member 35 is moved by the repulsive force of the spring 36 as described above.
3 together with it, and in conjunction therewith, the distal ends of the respective braking members 34a, 34b are again pressed against the inner peripheral surface of the outer hollow member, and the locked state is established again.

The footrest stay 2 having the above configuration
According to the embodiment of the telescopic lock mechanism 30 that supports the stage 1 at an arbitrary position in a stepless manner, when adjusting the angle of the footrest 21, the movable member 35 provided on the telescopic lock mechanism 30 with one hand is used. It is sufficient to raise and lower the inner hollow member 32 while holding down the inner hollow member 32 while pulling it down, and the inner hollow member 32 can be locked to the outer hollow member 31 at the same position by releasing the hand from the movable member 35. Therefore, it is possible to perform the operation quickly and with one hand,
Since the lock can be accurately performed at the desired position, the angle of the footrest 21 can be adjusted according to the obstacle of the wheelchair user.

Next, FIG. 5 shows an embodiment of the telescopic lock mechanism 30 for supporting the back frame 40 at an arbitrary position steplessly according to the second aspect of the present invention. A pair of front wheels 11 and rear wheels 12 (not shown) are mounted on the side surfaces of the main body frame 10, respectively.
Frame 40 pivotally supported on the upper rear wheel side of the vehicle
The back frame 40 is provided with a pad for supporting the back of the user. In addition, a telescopic lock mechanism 30 described below is disposed between the back side of the back frame 40 and the main body frame 10.

The main body frame 1 constructed as described above
0, the relationship between the back frame 40 and the telescopic lock mechanism 30 will be described in detail with reference to FIG. The base end of the back frame 40 is supported on the upper rear wheel side of the main body frame 10 via a rotating portion 42 so as to be tiltable. The telescopic lock mechanism 30 including the inner hollow member 32 movably inserted into the outer hollow member 31 is disposed between the back surface of the back frame 40 and the lower rear wheel side of the main body frame 10. The end of the inner hollow member 32 is
The support member 13 having a U-shaped cross section rotatably provided on the back frame 40 is pivotally supported via bolts and nuts. The end of the outer hollow member is connected to the lower rear wheel side of the main body frame. Is fixed to a columnar mounting support member 14.

Next, the internal structure of the telescopic lock mechanism 30 for supporting the back frame 40 will be described with reference to FIG. Each of the outer hollow member 31 and the inner hollow member 32 is formed in a hollow shape from a steel material or the like, and the outer surface thereof is subjected to a surface treatment such as painting or plating. And, in the center of the inner hollow member 32 and in the axial direction,
A core member 33 is movably provided. As shown, the inner hollow member 32 is provided with a movement guide member 37 formed in a substantially T-shape. Movement guide member 37
The insertion hole 33a through which the metal core member 33 is inserted
Are formed.

The inside of the inner hollow member 32 and the core member 3
A movable member 35 formed in a rod shape from a synthetic resin or the like is provided between the core member 33 and the movable member 35. The movable member 35 is inserted into the core member 33 in a direction perpendicular to the axial direction. The operating portion 39 provided on the inner hollow member 32 is configured such that both ends of the movable member 35 slightly protrude from long holes 32a formed at portions of the inner hollow member 32 facing each other. A spring 36 described as a biasing member is provided between the movable member 35 and the movement guide member 37. The spring 36 is always pressed in a direction to push up the movable member 35 by the elastic force of the spring 36. It is being rushed.

A center shaft 38 is provided at an end of the core member 33. A pair of braking members 34a, 34b, both of which rotate around the center shaft 38 and whose front ends are relatively close to or separated from each other. 34b are provided. The braking member 34
The a and b are configured such that the distal end portion comes into contact with or separates from the inner peripheral surface side of the outer hollow member 31 as the core metal member 33 moves in the axial direction. That is, as shown in the figure, one of the braking members 34a
7 is rotatably supported on one surface, and the other braking member 34
b is also rotatably supported by the other surface of the movement guide member 37 in the middle thereof so as to be substantially V-shaped as viewed in the drawing.

Therefore, both long holes 32a of the inner hollow member 32 are formed.
When the movable member 35 protruding from is not operated,
Since the movable member 35 is urged in a direction in which the movable member 35 is pushed up by the elastic force of the spring 36, the core metal member 33 provided integrally with the movable member 35 is also pulled upward,
In conjunction with this, the distal ends of the braking members 34a and 34b abut on the inner surface of the outer hollow member 31, and the inner hollow member 32 and the outer hollow member 31 are locked to each other (see FIG. 7).

On the other hand, in order to release the lock, as shown in FIG. 8, the movable member 35 is pulled downward (downward in the figure), and together with the core metal member 33 while resisting the elastic force of the spring 36. The brake members 34a and 34b are pulled down, and the leading ends of the respective brake members 34a and 34b are separated from the inner peripheral surface of the outer hollow member 31 to be in a non-pressed state. Therefore, the inner hollow member 32 can freely move in the length direction with respect to the outer hollow member 31, and the length can be freely adjusted.

When the lowering of the movable member 35 is released after the length adjustment, the movable member 35 is pulled up together with the metal core member 33 by the repulsive force of the spring 36, and the respective braking members are interlocked with it. Member 34
Since the distal ends of the a and 34b are pressed against the inner peripheral surface of the outer hollow member 31 again, the locked state is established again.

According to the embodiment of the telescopic lock mechanism 30 having the above-described configuration and supporting the back frame 40 at an arbitrary position in a stepless manner, when the angle of the back frame 40 is adjusted, the back frame 40 is movable with one hand. What is necessary is just to raise and lower while holding down the inner hollow member 32 while pulling down the member 35,
Further, if the hand is released from the movable member 35, the inner hollow member 32 can be locked to the outer hollow member 31 at the same position. Therefore, the operation can be performed quickly and with one hand, and the operation can be accurately locked at a desired position, so that the angle of the back frame 40 can be freely adjusted according to the obstacle of the wheelchair user. Can be.

For the operation of the telescopic lock mechanism 30, for example, although not shown, a lever provided on a handle portion of the back frame 40 is connected to a wire through a wire so that the caregiver can easily perform remote control. The lock may be released by using a well-known technique such as operating the movable member.

Next, according to the third aspect of the present invention, as shown in FIG. 3, the armrest 50 provided on at least one side of the main body frame 10 in the wheelchair 100 is continuously supported at an arbitrary position. The present invention relates to the telescopic lock mechanism 30, and the relationship between the main body frame 10, the armrest 50, and the telescopic lock mechanism 30 will be described below with reference to FIGS.

The armrest 50 is provided with a telescopic locking mechanism 3.
0, which is fixed to the end of the inner hollow member 32 constituting the inner hollow member 32 and into which the inner hollow member 32 is inserted.
Is fixed to the center of the side portion of the main body frame 10 by welding. Outer hollow member 31 and inner hollow member 32
Are all formed in a hollow shape from a steel material or the like, and the outer surface thereof is subjected to a surface treatment such as painting or plating. A core member 33 is movably provided in the center of the inner hollow member 32 and in the axial direction.

As shown in FIG. 9, the inner hollow member 32 is provided with a movement guide member 37 formed in a substantially T-shape. At the center of the movement guide member 37, an insertion hole 33a into which the cored bar member 33 is inserted is formed.

The inside of the inner hollow member 32 and the core member 3
A movable member 35 formed in a rod shape from a synthetic resin or the like is provided between the core member 33 and the movable member 35. The movable member 35 is inserted into the core member 33 in a direction perpendicular to the axial direction. The operating portion 39 provided on the inner hollow member 32 is configured such that both ends of the movable member 35 slightly protrude from long holes 32a formed at portions of the inner hollow member 32 facing each other.

A spring 36 is provided between the movable member 35 and the moving guide member 37 as an urging member.
The movable member 35 is normally urged in a direction to push up the movable member 35 by the elastic force of the spring 36.

A center shaft 38 is provided at an end of the metal core member 33. A pair of braking members 34a and 34a, both of which rotate around the center shaft 38 and whose front ends are relatively close to or separated from each other. 34b are provided. The braking member 34
The a and b are configured such that the distal end portion comes into contact with or separates from the inner surface side of the outer hollow member 31 as the core metal member 33 moves in the axial direction. That is, one of the braking members 34
a is rotatably supported at one half of the movement guide member 37 in the middle, as shown in FIG.
Also, it is rotatably supported on the other surface of the movement guide member 37 in the middle thereof so as to be substantially V-shaped as viewed in the drawing.

Therefore, when the movable member 35 protruding from both the long holes 32 of the inner hollow member 32 is not operated, the movable member 35 is urged by the elastic force of the spring 36 in a direction in which the movable member 35 is pushed up. The core metal member 33 integrally provided on the movable portion 35 is also pulled upward, and in conjunction therewith, the distal ends of the respective braking members 34a and 34b abut against the inner peripheral surface of the outer hollow member 31, and the inner hollow member is opened. The member 32 and the outer hollow member 31 are locked with each other (see FIG. 9).

On the other hand, in order to release the lock, FIG.
When the movable member 35 is pulled downward (downward in the figure) as shown in FIG. 7, the movable member 35 is pulled down together with the core member 33 while resisting the resiliency of the spring 36, and the braking members 34a, 34b Is the outer hollow member 3
1 is separated from the inner peripheral surface and is in a non-pressed state. Therefore,
The inner hollow member 32 can be freely moved in the length direction with respect to the outer hollow member 31, and the length can be adjusted freely.

After the length is adjusted, if the pulling down of the movable member 35 is released, as described above, the movable member 35 is moved by the repulsive force of the spring 36 to the core member 3.
3, and the leading ends of the respective braking members 34a and 34b are pressed against the inner peripheral surface of the outer hollow member 31 again in conjunction therewith, so that the locked state is established again.

The telescopic lock mechanism 30 having the above-described structure and supporting the armrest 50 at any position in a stepless manner.
According to the embodiment, when performing the height adjustment, the movable member 35 may be pulled down with one hand and moved up and down while holding the inner hollow member 32. The inner hollow member 32 at the position
1 can be reliably locked. Therefore,
Since the operation can be performed quickly and with one hand and can be accurately locked at a desired position, the height of the armrest can be freely adjusted according to the obstacle of the wheelchair user. Can be.

A fourth aspect of the present invention is a telescopic lock mechanism 30 for continuously supporting grips 60 provided at both ends of an upper edge of a back frame 40 in a wheelchair at arbitrary positions.
FIG. 11 shows the relationship between the back frame 40, the handle 60, and the telescopic lock mechanism 30.
This will be described in detail with reference to FIG.

The handle 60 is provided with a telescopic locking mechanism 3.
The inner hollow member 32 is fixed to an end of the inner hollow member 32 constituting the back frame 40 and is movably inserted into the outer hollow member 31 constituting the back frame 40. Each of the outer hollow member 31 and the inner hollow member 32 is formed in a hollow shape from a steel material or the like, and the outer surface thereof is subjected to a surface treatment such as painting or plating. And
A core metal member 33 is movably provided in the center of the inner hollow member 32 and in the axial direction.

As shown in FIG. 11, the inner hollow member 32 is provided with a movement guide member 37 formed in a substantially T-shape. At the center of the movement guide member 37, an insertion hole 33a into which the cored bar member 33 is inserted is formed.

The inside of the inner hollow member 32 and the core member 3
A movable member 35 formed in a rod shape from a synthetic resin or the like is provided between the core member 33 and the movable member 35. The movable member 35 is inserted into and fixed to the metal core member 33 in a direction perpendicular to the axial direction. In addition, the operation section 39 provided on the inner hollow member 32 is configured such that both ends of the movable member 35 slightly protrude from the elongated holes 33a formed at portions of the inner hollow member 32 facing each other.

A spring 36 as an urging member is provided between the movable member 35 and the moving guide member 37. The spring 36 is always urged in a direction to push up the movable member 35 by the elastic force of the spring 36. Have been.

A center shaft 38 is provided at an end of the metal core member 33. A pair of braking members 34a and 34a, both of which rotate around the center shaft 38 and whose front ends are relatively close to or separated from each other. 34b are provided. The braking member 34
The a and b are configured such that the distal end portion comes into contact with or separates from the inner surface side of the outer hollow member 31 as the core metal member 33 moves in the axial direction. That is, one of the braking members 3
4a is rotatably supported on one surface of the movement guide member 37 in the middle thereof, and the other braking member 34b is also rotatably supported on the other surface of the movement guide member 37 in the middle thereof. , So as to be substantially V-shaped in the drawing.

Therefore, both long holes 33a of the inner hollow member 32 are formed.
When the movable member 35 protruding from is not operated,
Since the movable member 35 is urged in the direction in which the movable member 35 is pushed up by the resilience of the spring 36, the core metal member 33 provided integrally with the movable member 35 is also pulled upward, and the respective braking members The distal ends of 34a and 34b are in contact with the inner peripheral surface of the outer hollow member 31, and the inner hollow member 32 and the outer hollow member 31 are locked to each other (see FIG. 11).

On the other hand, in order to release the lock, FIG.
When the movable member 35 is pulled downward (downward in the figure) as shown in FIG. 7, the movable member 35 is pulled down together with the core member 33 while resisting the resiliency of the spring 36, and the braking members 34a, 34b Is the outer hollow member 3
1 is separated from the inner peripheral surface and is in a non-pressed state. Therefore,
The inner hollow member 32 can be freely moved in the length direction with respect to the outer hollow member 31, and the length can be adjusted freely.

When the lowering of the movable member 35 is released after the length adjustment, as described above, the movable member 35 is pulled up together with the cored bar member 33 by the repulsive force of the spring 36, and as described above. In conjunction with this, the leading ends of the respective braking members 34a and 34b are again pressed against the inner peripheral surface of the outer hollow member 31, so that the locked state is established again.

The extendable lock mechanism 30 having the above-described structure and supporting the handle portion 60 at an arbitrary position in a stepless manner.
According to the embodiment, when the height of the handle portion 60 is adjusted, the movable member 35 may be pulled down with one hand and moved up and down while holding the inner hollow member 32.
By releasing the hand from 5, the inner hollow member 32 can be locked to the outer hollow member 31 at the same position.
Therefore, the operation can be performed quickly and with one hand, and since the lock can be accurately performed at a desired position, the height of the handle portion 60 can be freely adjusted according to the use state of the caregiver. Can be done.

Next, a fifth aspect of the present invention relates to a telescopic lock mechanism 30 for continuously supporting a footrest 23 provided at the tip of a footrest 21 in a wheelchair at an arbitrary position. , Footrest stay 21, footrest 2
The relationship between the lock 3 and the telescopic lock mechanism 30 will be described in detail with reference to FIGS.

The foot rest 23 is rotatably provided at the tip of an inner hollow member 32 constituting the telescopic locking mechanism 30, and the inner hollow member 32 is provided on the outer side constituting the foot stay 21. It is movably inserted into the hollow member 31. Each of the outer hollow member 31 and the inner hollow member 32 is formed in a hollow shape from a steel material or the like, and the outer surface thereof is subjected to a surface treatment such as painting or plating. A core member 33 is movably provided in the center of the inner hollow member 32 and in the axial direction.

As shown in FIG. 13, the inner hollow member 32 is provided with a movement guide member 37 formed in a substantially T-shape. At the center of the movement guide member 37, an insertion hole 33a into which the cored bar member 33 is inserted is formed.

The inside of the inner hollow member 32 and the core member 3
A movable member 35 formed in a rod shape from a synthetic resin or the like is provided between the core member 33 and the movable member 35. The movable member 35 is inserted into and fixed to the metal core member 33 in a direction perpendicular to the axial direction. In addition, the operation section 39 provided on the inner hollow member 32 is configured such that both ends of the movable member 35 slightly protrude from the elongated holes 33a formed at portions of the inner hollow member 32 facing each other.

A spring 36 as an urging member is provided between the movable member 35 and the movement guide member 37. The spring 36 is always urged in a direction to push up the movable member 35 by the elastic force of the spring 36. Have been.

A center shaft 38 is provided at an end of the metal core member 33. A pair of braking members 34a and 34a, both of which rotate around the center shaft 38 and whose front ends are relatively close to or separated from each other. 34b are provided. The braking member 34
The a and b are configured such that the distal end portion comes into contact with or separates from the inner surface side of the outer hollow member 31 as the core metal member 33 moves in the axial direction. That is, one of the braking members 3
4a is rotatably supported on one surface of the movement guide member 37 in the middle thereof, and the other braking member 34b is also rotatably supported on the other surface of the movement guide member 37 in the middle thereof. , So as to be substantially V-shaped in the drawing.

Therefore, both long holes 33a of the inner hollow member 32 are formed.
When the movable member 35 protruding from is not operated,
Since the movable member 35 is urged in the direction in which the movable member 35 is pushed up by the resilience of the spring 36, the core metal member 33 provided integrally with the movable member 35 is also pulled upward, and the respective braking members The distal ends of 34a and 34b abut against the inner peripheral surface of the outer hollow member 31, and the inner hollow member 32 and the outer hollow member 31 are locked to each other (see FIG. 13).

On the other hand, in order to release the lock, FIG.
When the movable member 35 is pulled downward (downward in the figure) as shown in FIG. 7, the movable member 35 is pulled down together with the core member 33 while resisting the resiliency of the spring 36, and the braking members 34a, 34b Is the outer hollow member 3
1 is separated from the inner peripheral surface and is in a non-pressed state. Therefore,
The inner hollow member 32 can be freely moved in the length direction with respect to the outer hollow member 31, and the length can be adjusted freely.

After the length is adjusted, if the above-described lowering of the movable member 35 is released, the movable member 35 is pulled upward together with the cored bar member 33 by the repulsive force of the spring 36, as described above. In conjunction with this, the leading ends of the respective braking members 34a and 34b are again pressed against the inner peripheral surface of the outer hollow member 31, so that the locked state is established again.

The footrest 23 having the above configuration is
Telescopic locking mechanism 3 that supports the steplessly at any position
According to the zeroth embodiment, when adjusting the length of the footrest portion 23, the movable member 35 may be pulled down with one hand and moved up and down while holding the inner hollow member 32. Release the inner hollow member 32
Can be locked to the outer hollow member 31. Therefore, the operation can be performed quickly and with one hand, and can be accurately locked at a desired position, so that the length of the footrest 23 can be freely adjusted according to the use state of the caregiver. Can be done.

Incidentally, the present invention is not limited to the above-described embodiments, but includes improvements, modifications, etc. within a range that can achieve the object of the present invention.

[0063]

As described above, according to the telescopic locking mechanism in the wheelchair according to the present invention, the length can be easily adjusted by simply moving the movable member down with one hand and raising and lowering while holding the inner hollow member. It is also possible to securely lock the inner hollow member to the outer hollow member at the same position if you release your hand from the movable member,
It is possible to achieve an excellent effect that the operation can be performed quickly and with one hand, and can be accurately locked at a desired position according to the use state of the wheelchair user and the caregiver.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a telescopic locking mechanism for supporting a foot stay in an arbitrary position steplessly according to the present invention.

FIG. 2 is a partially enlarged perspective view showing a relationship between a footrest stay and a telescopic lock mechanism shown in FIG. 1;

FIG. 3 is a partially enlarged sectional view showing a non-locked state of the telescopic lock mechanism shown in FIG. 2;

FIG. 4 is a sectional view showing a locked state of the telescopic lock mechanism shown in FIG. 3;

FIG. 5 is a perspective view showing an embodiment of a telescopic locking mechanism for supporting a back frame at an arbitrary position in a stepless manner according to the present invention.

FIG. 6 is a rear perspective view showing an embodiment of a telescopic lock mechanism for supporting a back frame at an arbitrary position in a stepless manner according to the present invention.

FIG. 7 is a partially enlarged sectional view showing a non-locked state of the telescopic lock mechanism shown in FIG. 6;

FIG. 8 is a sectional view showing a locked state of the telescopic lock mechanism shown in FIG. 7;

FIG. 9 is a partially cutaway sectional view showing an embodiment of a telescopic lock mechanism for supporting an armrest at an arbitrary position in a stepless manner according to the present invention.

FIG. 10 is a partially cutaway sectional view showing an embodiment of a telescopic locking mechanism for supporting an armrest at an arbitrary position steplessly according to the present invention.

FIG. 11 is a partially cutaway sectional view showing an embodiment of a telescopic locking mechanism for supporting a handle portion at an arbitrary position in a stepless manner according to the present invention.

FIG. 12 is a partially cutaway sectional view showing an embodiment of a telescopic lock mechanism for supporting a handle portion at an arbitrary position in a stepless manner according to the present invention.

FIG. 13 is a partially cutaway sectional view showing an embodiment of a telescopic locking mechanism for supporting a footrest at an arbitrary position steplessly according to the present invention.

FIG. 14 is a partially cutaway sectional view showing an embodiment of a telescopic lock mechanism for supporting a footrest at an arbitrary position steplessly according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body frame 21 Footrest 23 Foot rest 30 Telescopic locking mechanism 31 Outer hollow member 32 Inner hollow member 32a Long hole 33 Core metal member 33a Insertion hole 34a Braking member 34b Braking member 35 Movable member 36 Biasing member 37 Moving guide Member 38 Central axis 39 Operation part 40 Back frame 50 Armrest part 60 Handle part 100 Wheelchair

Claims (6)

[Claims] 1. One end is provided on a body frame of a wheelchair, and the other end is provided on a foot stay which is rotatably provided on the body frame, and supports the foot stay in an arbitrary position in a stepless manner. An outer hollow member, an inner hollow member movably inserted into the outer hollow member, and a core bar provided at the inner center of the inner hollow member and movably in the axial direction. A member, a movable member provided on the cored member and moving in the axial direction together with the cored member, and both rotating about a central axis provided on the cored member, and moving the movable member. With the above, a pair of braking members whose leading end portions are in contact with or separated from the inner peripheral surface of the outer hollow member, and the braking member is rotated in a direction in which the braking member is always in contact with the inner peripheral surface of the outer hollow member. Movable Telescoping locking mechanism, wherein a biasing member for biasing the timber, by comprising an operation unit for operating the movable member provided in the inner hollow member. 2. A telescopic device having one end provided on a body frame of a wheelchair and the other end provided on a back frame rotatably provided on the body frame, and supporting the back frame at an arbitrary position in a stepless manner. In the universal lock mechanism, an outer hollow member, an inner hollow member movably inserted into the outer hollow member, and a core metal member provided at an inner center of the inner hollow member and provided movably in an axial direction. A movable member provided on the metal core member and moving in the axial direction together with the metal core member; and both of the rotary members are rotated around a central axis provided on the metal core member, and the movable member moves with the movable member. A pair of braking members whose leading end portions abut or separate from the inner peripheral surface of the outer hollow member, and a pair of braking members for rotating the braking member in a direction to normally contact the inner peripheral surface of the outer hollow member. An urging member for urging the moving member, retractable locking mechanism, characterized by comprising an operation unit for operating the movable member provided in the inner hollow member. 3. A telescopic locking mechanism for continuously supporting an armrest provided at least on one side of a body frame of a wheelchair at an arbitrary position, wherein an inner hollow member provided with the armrest; An outer hollow member provided in the main body frame and into which the inner hollow member is movably inserted; a core metal member provided at an inner center of the inner hollow member and provided movably in an axial direction; A pair of brakes, both of which rotate around a central axis provided on the member, and whose leading end portions abut or separate from the inner peripheral surface of the outer hollow member as the cored bar member moves in the axial direction. A movable member provided on the core metal member and moving in the axial direction together with the core metal member; and a movable member for rotating the braking member in a direction in which the braking member is always brought into contact with the inner peripheral surface of the outer hollow member. Department An urging member for urging the telescopic locking mechanism, characterized by comprising a characterized by including an operation unit for operating the movable member provided in the inner hollow member. 4. A telescopic locking mechanism for continuously supporting grips provided at both ends of an upper edge of a back frame in a wheelchair at an arbitrary position, wherein: an inner hollow member provided with the grips; and the back frame. And an outer hollow member into which the inner hollow member is movably inserted, a core metal member provided at an inner center of the inner hollow member and movably provided in the axial direction, and A pair of braking members, both of which rotate around the provided central axis, along with the axial movement of the metal core member, the distal end portions of which contact or separate from the inner peripheral surface of the outer hollow member. A movable member provided on the metal core member and moving in the axial direction together with the metal core member; and the movable member to rotate the braking member in a direction in which the braking member always comes into contact with the inner peripheral surface of the outer hollow member. A biasing member for energizing, telescoping locking mechanism, characterized by comprising a characterized by including an operation unit for operating the movable member provided in the inner hollow member. 5. A telescopic lock mechanism for continuously supporting a footrest provided at a tip of a footrest in a wheelchair at an arbitrary position, wherein the inner hollow member provided with the footrest and the back part. An outer hollow member that constitutes a frame and into which the inner hollow member is movably inserted; a core metal member that is provided at an inner center of the inner hollow member and that is movably provided in the axial direction; A pair of braking members, both of which rotate around a central axis provided in the shaft member and whose leading end portions abut or separate from the inner peripheral surface of the outer hollow member as the core metal member moves in the axial direction. A movable member provided on the core member and moving in the axial direction together with the core member; and the movable member for rotating the braking member in a direction in which the braking member is always brought into contact with the inner peripheral surface of the outer hollow member. With Biasing member and telescopic lock mechanism, characterized by comprising a characterized by including an operation unit for operating the movable member provided in the inner hollow member. 6. The operation unit according to claim 1, wherein an elongated hole is formed in an axial direction at portions of the inner hollow member opposed to each other, and a movable member protrudes from the elongated hole. The telescopic lock mechanism according to any one of claims 1 to 5.