JP3186445U - Arm holder - Google Patents

Abstract

An arm holder that can provide a comfortable feeling of use regardless of the thickness of the arm.
An arm holder 1 can be attached to a body frame 51 of a wheelchair 5, and in particular, can be attached in the vicinity of an armrest where a user's forearm is located. The arm holder 1 includes an armrest 2 on which at least a part of a user's forearm can be placed, and a connecting member 3 that can connect the armrest 2 to a main body frame 51. The armrest 2 includes a flat portion 21 that extends in the longitudinal direction Y, a wall portion 22 that extends in the longitudinal direction Y and rises from both sides of the flat portion 21, and a back surface 23 that faces the main body frame 51. The flat portion 21 has a dimension in the longitudinal direction Y of about 350 to 400 mm, and a dimension in the width direction X intersecting the longitudinal direction Y is about 30 to 70 mm, preferably 50 to 70 mm. The wall portion 22 preferably has an angle of 90 degrees or more with the flat portion 21.
[Selection] Figure 1

Description

  The present invention relates to an arm holder that can be attached to a chair such as a wheelchair, and more particularly to an arm holder on which a user can put a paralyzed arm.

  Conventionally, an armrest that can be attached to a wheelchair is known. The armrest includes an armrest on which the user can put his arm. The user can support the shoulder joint and reduce the burden on the neck, shoulder, arm, and the like by placing the upper limb that is paralyzed and difficult to hold on its own on the armrest.

JP 2006-101936 A

  However, according to Patent Document 1, since the cross-sectional shape of the armrest is U-shaped, it is cramped for a user with a thick arm, and the opening side edge may bite into the user's arm. In particular, edema is likely to occur in a paralyzed arm, and the above problems are likely to occur. Also, a paralyzed arm may not be able to move the wrist and bend and extend the wrist. In such a case, the U-shaped armrest has a problem that the wrist and the hand are caught on the opening side edge of the armrest and it is difficult to place the arm on the armrest.

  An object of the present invention is to provide an arm holder that can provide a comfortable feeling of use regardless of the thickness of the arm or the state of paralysis.

  The present invention is an arm holder comprising an armrest on which at least a part of a forearm can be placed, and a connecting member capable of connecting the armrest to a body frame of a chair, wherein the armrest is a flat member extending in the longitudinal direction. And a wall portion extending in the longitudinal direction and rising from both sides of the flat portion.

  The connecting member includes a fixing portion fixed to the main body frame, and a rotating portion that is detachably attached to the fixing portion and is rotatably attached to the back surface of the armrest. A rotating plate rotatable with respect to the armrest; a protrusion fixed to the back surface; and an insertion pin attached to the rotating plate and extending away from the back surface. The protrusion slides on the rotating plate. A movable sliding hole may be provided, and the fixing portion may be formed with an insertion hole into which the insertion pin can be inserted.

  The sliding hole and the insertion pin of the rotating part may be provided symmetrically with respect to the rotation axis of the rotating plate, and the sliding hole may be formed in an arc shape.

  According to the arm holder of the present invention, the armrest on which the forearm is placed has a flat portion extending in the longitudinal direction. Therefore, by increasing the length in the width direction perpendicular to the longitudinal direction of the flat portion, the user with a thick arm However, the forearm can be easily placed on the armrest, and a comfortable feeling can be obtained. Furthermore, even a user who is difficult to extend because the wrist is bent can place the forearm, wrist, and hand on the armrest.

The perspective view which shows the outline | summary of a use condition when attaching an arm holder to a wheelchair. (A) The exploded assembly figure of an armrest and a connection member. (B) The front view of an armrest and a connection member. The side view of FIG.2 (b). The perspective view of a part of fixing part. The figure when an armrest is seen from the back side. The partial cross section figure of the armrest in other embodiment.

  Referring to FIG. 1, the arm holder 1 can be attached to, for example, a main body frame 51 of the wheelchair 5, and particularly preferably in the vicinity of the armrest where the user's forearm is located. The arm holder 1 includes an armrest 2 on which at least a part of a user's forearm can be placed, and a connecting member 3 that can connect the armrest 2 to a main body frame 51.

  The armrest 2 includes a flat portion 21 extending in the longitudinal direction Y, a pair of wall portions 22 extending in the longitudinal direction Y and rising from both sides of the flat portion 21, and a back surface 23 facing the main body frame 51. The flat portion 21 has a dimension D1 in the longitudinal direction Y of about 350 to 400 mm (see FIG. 2), and a dimension D2 in the width direction X intersecting the longitudinal direction Y is about 30 to 70 mm, preferably 50 to 70 mm (see FIG. 2). (See FIG. 3). It is desirable that the wall portion 22 has an angle α formed with the flat portion 21 of 90 degrees or more (see FIG. 3). Note that the back surface 23 is a flat surface in the same manner as the flat portion 21.

  Referring to FIGS. 2 to 4, the connecting member 3 includes a fixing part 30 fixed to the main body frame 51 and a rotating part 40 detachably connected to the fixing part 30. Specifically, the fixed portion 30 includes a pair of first and second plates 31 and 32 that extend in the longitudinal direction Y and are spaced apart in the vertical direction of the drawing, and a side plate 33 that connects the first and second plates 31 and 32. The holding plate 34 provided at the front end of the second plate 32 in the width direction X and bent with respect to the second plate 32 to hold the main body frame 51, and the auxiliary plate for fixing the main body frame 51 between the holding portions 34 35.

  The auxiliary plate 35 rises from a mounting portion 35A facing the second plate 32, one end in the width direction X of the mounting portion 35A, a frame facing portion 35B facing the main body frame 51, and the other end. And a pressing facing portion 35C. In the auxiliary plate 35, the attachment portion 35A is attached to the second plate 32 with a fastening member 36 such as a screw, and the screw hole formed in the second plate 32 is a long hole 37 extending in the width direction X. The position of the plate 35 can be adjusted in the width direction X. The fastening member 36 and the long hole 37 are provided in two spaced apart in the longitudinal direction Y. The side plate 33 is provided with an insertion hole 38, and a pressing member 39 capable of pressing the pressing facing portion 35C of the auxiliary plate 35 toward the holding portion 34 can be inserted.

  In the connecting member 3 as described above, the pressing member 39 presses the pressing facing portion 35 </ b> C of the auxiliary plate 35 to sandwich the main body frame 51 between the frame facing portion 35 </ b> B and the holding portion 34. The attachment portion 35A of the auxiliary plate 35 is fixed to the second plate 32 by the fastening member 36 at the pressed position. Therefore, after the connecting member 3 is fixed to the main body frame 51, it is possible to prevent the connecting member 3 from shifting or coming off.

  In the connecting member 3, a first through hole 31 </ b> A and a second through hole 32 </ b> A are formed in the first plate 31 and the second plate 32, respectively. Two of these first and second through holes 31A, 32A are provided apart from each other in the longitudinal direction Y.

  Referring further to FIG. 5, the rotation unit 40 enables the armrest 2 to rotate with respect to the main body frame 51. The rotating part 40 slides in the sliding hole 43, a rotating plate 42 connected to the back surface 23 of the armrest 2 via a fastening member 41 such as a screw, a sliding hole 43 provided in the rotating plate 42. A projection 44 that can be projected from the back surface 23 and an insertion pin 45 that is attached to the rotating plate 42 and extends away from the back surface 23.

  The rotating plate 42 is attached by a fastening member 41 so that the central portion thereof can rotate with respect to the armrest 2. That is, the armrest 2 and the rotating plate 42 rotate relatively with the fastening member 41 as an axis. With these rotations, the protrusion 44 slides in the sliding hole 43. Two protrusions 44 are provided point-symmetrically on the fastening member 41, which is a rotating shaft, and two sliding holes 43 are also provided. The sliding hole 43 is formed in an arc shape. These sliding holes 43 and protrusions 44 restrict the rotation angle of the rotating plate 42 within a certain range. Therefore, the armrest 2 can be relatively rotated within the range up to the position indicated by the phantom line in FIG.

  The rotating part 40 as described above inserts the armrest 2 via the fixing part 30 by inserting the insertion pin 45 through the first and second through holes 31A and 32A of the first plate 31 and the second plate 32. Can be attached to the wheelchair 5 (see FIG. 2). Since the armrest 2 is rotatable with respect to the rotating unit 40, the armrest 2 can be moved to a desired position with respect to the main body frame 51 of the wheelchair 5. In this embodiment, since the two insertion pins 45 are used, even when the armrest 2 is rotated, the armrest 2 and the rotating plate 42 can be relatively rotated.

  According to the arm holder 1 in this embodiment, the armrest 2 has the flat portion 21 and the dimension in the width direction X is about 30 to 70 mm. Can be put on. In addition, by having the flat portion 21, in the case of a user whose wrist is difficult to move due to paralysis, the wrist and hand can be placed on the armrest 2 together with the forearm.

  The armrest 2 can prevent the placed forearm from falling from the armrest 2 by providing the wall portions 22 on both sides thereof. In addition, since the wall portion 22 has an angle α of 90 degrees or more with the flat portion 21, the arm on which the wall portion 22 is placed is not compressed, and the upper end of the wall portion 22 is prevented from biting into the arm. can do. The distance between the pair of wall portions 22 in the width direction X increases as the distance from the flat portion 21 increases. Therefore, when the user puts the forearm, the wall portion 22 is unlikely to collide, and after the forearm is put on, it can be prevented from biting in. In this embodiment, the wall 22 is substantially flat, but may be curved.

  Since the armrest 2 can be rotated with respect to the connecting member 3, the user can adjust the position of the forearm so that the user can easily place the armrest, and the armrest 2 can be paralyzed and moved by rotating the armrest 2 with the forearm placed. The difficult forearm can be moved easily, and sticking of the elbow can be prevented. Furthermore, when standing up, if the armrest 2 is parallel to the main body frame 51, the armrest 2 does not interfere with the operation of the user.

  Since the armrest 2 can be attached to the main body frame 51 simply by inserting the two insertion pins 45 into the insertion hole 38, it can be easily removed. Moreover, since the connection member 3 can also be removed from the main body frame 51 by the operation of the pressing member 39, the arm holder 1 can be easily replaced even when changing to another chair.

(Experimental example)
For example, a stroke hemiplegic person cannot support one arm himself and falls down from his / her shoulder compared to a person without paralysis, and the body tilts greatly when viewed from the front. Such an inclination may reduce the work efficiency of daily life and cause various modulations. Therefore, the effect of using the arm holder 1 on the tilt of the body was investigated.

  Eighteen stroke hemiplegic patients who use a wheelchair in daily life are seated in a wheelchair 5 with the arm holder 1 attached, and the forearm with paralysis is placed on the armrest 2 and features of sitting posture and sitting pressure distribution Was analyzed. The average age of the subjects of the experiment was 66.4 ± 8.5 years, and of the 18 subjects, there were 8 men and 10 women.

The wheelchair was modular, and the height of the armrest and seat was adjusted according to the physique of the subject. The sitting posture evaluation was performed by taking a VTR image of a subject sitting on a wheelchair from the surface and measuring the inclination of a line connecting both shoulder peaks. The smaller the inclination, the better the posture.
The seat pressure distribution was measured by using a body pressure detection sensor (manufactured by Tokai Rubber Co., Ltd.) and installing it on the seat surface of a wheelchair laid with a board and measuring the seat pressure distribution. Specifically, the pressure portion of moderate or higher degree in the sitting pressure distribution image was divided on the left and right sides of the subject, and the areas were compared. It was evaluated that the difference between the paralyzed side and the non-paralyzed side became smaller as the sitting pressure left-right difference became smaller, and there was an improvement.

(Experimental result)
In the sitting posture evaluation, when the arm holder 1 was not used, the average inclination of the posture was 4.45 degrees, whereas the average when the arm holder 1 was used was 3.3 degrees. Therefore, the use of the arm holder 1 improved the inclination of the posture.
In the sitting pressure evaluation, when the left-right pressure difference when the arm holder 1 is not used is 1, the left-right pressure difference when the arm holder 1 is used is 0.58. Therefore, by using the arm holder 1, it was proved that the sitting pressure biased to one side was improved, and the pressure biased to the buttocks and thighs having paralysis was reduced. That is, by placing the paralyzed forearm on the armrest 2, it is possible to disperse the biased pressure.

  FIG. 6 shows an armrest 2 of another embodiment. The armrest 2 can also have a cushion material 25 attached to the flat portion 21 separately. The cushion material 25 includes a core material 26 formed of a cushioning polyurethane resin or the like, and a covering member 27 made of leather or the like that covers the core material 26. Thus, by providing the cushion material 25 separately, even if the armrest 2 main body is made of a relatively hard material, the arm holder 1 that is comfortable to use can be obtained. Specifically, the armrest 2 main body can be made of wood to give a high-class feeling, and the cushioning material 25 can be attached to the flat portion 21 to improve the feeling of use. Further, by making the covering member 27 made of leather, it is possible to produce a more luxurious feeling. When the cushion material is not separately attached, the armrest 2 main body can be formed using a polyurethane resin having flexibility and cushioning properties.

  In this embodiment, although the case where the arm holder 1 was attached only to one main body frame 51 of the wheelchair 5 for hemiplegic persons, it may be attached to both main body frames 51. Further, an elbow receiving wall portion standing continuously with the wall portion 22 can be provided at the rear end portion of the armrest 2 in the longitudinal direction Y. By providing the wall portion for receiving the elbow in this way, it is possible to prevent the forearm from falling from the armrest 2 due to the elbow protruding from the rear end portion.

  The fixing portion 30 is attached so that the first plate 31 is located above the drawing and the second plate 32 is located below the drawing, but can be attached so that the top and bottom are reversed. That is, when an armrest is previously attached to the main body frame 51 of the wheelchair 5 as in this embodiment, the fixing portion 30 is fixed to the main body frame 51 so that the first plate 31 is positioned upward. You can also. When the armrest is not attached to the main body frame 51, the first plate 31 can be fixed so as to be positioned below.

  In addition to the materials described in the present specification, various known materials that are usually used in this type of field can be used for each constituent member constituting the arm holder 1 without limitation. Further, in the specification of the present invention and the scope of claims for utility model registration, the terms “first” and “second” are used merely to distinguish elements, positions, and the like having the same names.

DESCRIPTION OF SYMBOLS 1 Arm holder 2 Armrest 3 Connecting member 5 Wheelchair 21 Flat part 22 Wall part 23 Back surface 30 Fixed part 31A 1st through-hole (through-hole)
31B Second through hole (through hole)
40 Rotating part 42 Rotating plate 43 Sliding hole 44 Projection 45 Inserting pin 51 Body frame

Claims (3)

An arm holder comprising: an armrest capable of placing at least a part of a forearm; and a connecting member capable of connecting the armrest to a body frame of a chair,
The arm rest has a flat part extending in the longitudinal direction and a wall part extending in the longitudinal direction and rising from both sides of the flat part. The connecting member includes a fixing portion fixed to the main body frame, and a rotating portion that is detachably attached to the fixing portion and is rotatably attached to the back surface of the armrest.
The rotating portion includes a rotating plate rotatable with respect to the armrest, a protrusion fixed to the back surface, and an insertion pin attached to the rotating plate and extending in a direction away from the back surface,
The rotating plate is provided with a sliding hole through which the protrusion can slide,
The arm holder according to claim 1, wherein the fixing portion is formed with an insertion hole into which the insertion pin can be inserted.   The arm holding device according to claim 2, wherein the sliding hole and the insertion pin of the rotating portion are provided symmetrically with respect to a rotation axis of the rotating plate, and the sliding hole is formed in an arc shape. Ingredients.

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