JP3147551U - wheelchair - Google Patents

Abstract

A wheelchair in which a user sits backwards makes it easy to climb a road step.
A chair portion 2 is provided rearward on a frame 1 provided with front and rear wheels 4 and 5 respectively. The front end 13B side of the handle 13 having the base end side 13A fixed to the rear side of the frame 1 is provided facing rearward. The rear wheel 5 is formed with a larger diameter than the front wheel 4. Since the user X faces backward and faces the caregiver Y, both the user X and the caregiver Y can move with peace of mind. The length L can be reduced, the second rotating shaft 23 can be brought close to the hand gripping the grip 15, and the grip 15 and the second rotating shaft 23 are close to each other. The lifting angle can be finely adjusted.
[Selection] Figure 1

Description

  The present invention relates to a wheelchair.

  Conventionally, a wheelchair is provided with a chair portion facing forward on a frame provided with front and rear wheels, respectively, and a front end side of a handle with a proximal end fixed on the rear side of the frame facing rearward. It was.

  In such a wheelchair, the user sits forward and the assistant who holds and pushes the handle stands behind the wheelchair, so the user's face and the assistant's face do not face each other. For this reason, since it is difficult for the user to see the face of the assistant, it is easy to have anxiety. On the other hand, since the assistant cannot see the face of the user, it is difficult to care.

  In order to solve this problem, a wheelchair frame formed of a pipe has a handle fixing portion attached to the front portion of a side frame provided on both sides of the seat, and a protruding portion protruding upward from the handle fixing portion. On the downhill, the assistant turns to the front side of the wheelchair and grasps the auxiliary handle attached to the front part of the side frame and moves backward, or the road under construction with gravel or unevenness When driving on a bad road such as a snowy road, an auxiliary wheel for an wheelchair that can be driven by turning the wheelchair backward by using the main wheel as a front wheel is known. Patent Document 1).

Furthermore, assuming that the seat of the wheelchair is a reclining type, a connecting pin is provided at the rear end of the seat frame to which the seat is attached, and the back frame to which the backrest is attached is connected via the connecting pin so as to be rotatable in the front-rear direction. As a result, each fulcrum is a substantially parallel link fulcrum (for example, Patent Document 2), and an electric wheelchair has a seat cushion (seat seat) on which an occupant sits, a seat back (backrest), and a footrest (footrest). These are connected to each other via a link mechanism, have a reclining function by the action of the link mechanism, and can take a seated state where the occupant can sit and a full flat state where the occupant can take a lying posture An electric wheelchair is also known (for example, Patent Document 3).
Utility Model Registration No. 3114363 Utility Model Registration No. 3139367 JP 2005-198711 A

  In the prior art, the assistant turns to the front side of the wheelchair and pushes the wheelchair backwards with the large main wheel as the front wheel. It has problems such as difficulty getting on.

  The problem to be solved is that a wheelchair in which a user sits backwards makes it easy to ride on a road step and make it easier to use.

  According to the first aspect of the present invention, a chair portion is provided rearward on a frame in which front and rear wheels are respectively provided at the front and rear, and a front end side of a handle having a proximal end fixed to the frame or the chair portion is provided rearward. The wheelchair is characterized in that the rear wheel has a larger diameter than the front wheel.

  The invention according to claim 2 is the wheelchair according to claim 1, wherein the second rotation shaft portion of the rear wheel is provided at a higher position than the first rotation shaft portion of the front wheel.

  According to a third aspect of the present invention, the handle includes a base end side rod that is fixed to a rear side of the frame or the chair portion and protrudes obliquely rearward, and a rear end that extends to the base end side rod. The wheelchair according to claim 1 or 2, further comprising a grip portion protruding from the front end side.

  The invention according to claim 4 is the wheelchair according to any one of claims 1 to 3, wherein the front wheel is a caster.

  The invention according to claim 5 is characterized in that the second diameter of the rear wheel is formed to be twice or more of the first diameter of the front wheel. It is a wheelchair as described in.

  The invention according to claim 6 is the wheelchair according to any one of claims 1 to 5, wherein an auxiliary handle is provided on the frame or the chair portion toward the front.

  The invention according to claim 7 is characterized in that the chair part includes a seat part and a reclining backrest part standing on the rear part of the seat part. The wheelchair.

  According to the first aspect of the present invention, when the front wheel is lifted with the center of the rear wheel as the rotation center, the grip portion and the rotation center are close to each other, and the rotation center is located near the hand.

  According to the invention of claim 2, the grip portion and the rotation center on the rear wheel side can be close to each other.

  According to the invention of claim 3, the grip portion can be provided apart from the chair portion, and the caregiver's posture can be facilitated.

  According to the invention of claim 4, the wheelchair can be directed in a desired direction by the caster.

  According to the invention of claim 5, the distance between the center of the rear wheel and the grip portion can be reliably reduced.

  According to the sixth aspect of the present invention, the user can move in the forward direction by grasping the auxiliary handle.

  According to the invention of claim 7, the user can sit in an easy posture by reclining the backrest portion.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiment described below does not limit the contents of the present invention described in the claims of the utility model registration. In addition, all the configurations described below are not necessarily essential requirements of the present invention.

  As shown in FIGS. 1-2, the chair part 2 is provided in the frame 1 of the wheelchair backwards so that the user X can sit backwards with respect to the advancing direction F, ie, the front. A frame 1 for supporting a front wheel, a rear wheel, and a chair portion, which will be described later, has a reinforcing pipe (not shown) for supporting them horizontally placed between a pair of left and right side frames 3. The side frame 3 includes a front leg portion 6 and a rear leg portion 7 that are arranged in the front and rear direction and rotatably support the front wheel 4 side and the rear wheel 5 side, and installation portions 8 and 8A that erected these in the front-rear direction. ing. The chair portion 2 supported by the side frame 3 and the reinforcing pipe has a seat portion 9 and a backrest portion 10 standing on the front side of the seat portion 9. The back rest 10 is provided with a lower end of a support pipe 10A erected on the left and right sides of the back rest 10 on the frame 1 via a shaft 10B, and in the embodiment, on a construction part 8A. A reclining mechanism 8C is interposed between the frame 1 and the lower installation portion 8A in the embodiment. The reclining mechanism 8C is such that the backrest portion 10 (support pipe 10A) can be intermittently or continuously tilted backward as indicated by a one-dot chain line around the shaft 10B, and can be fixed at a predetermined angle. As a specific mechanism, various well-known recliner chairs such as the prior art may be used. Further, the upper erection part 8 is provided with an elbow rest part 11 via an erection part 8 disposed at the upper side, and a foot plate 12 for footrest is directed rearward at the lower end of the rear leg part 7. It is provided sideways.

  Furthermore, the side frame 3 is provided with a handle 13 facing rearward for hand pushing. The front portion of the handle 13 is connected to the rear end of the frame 1, and in the embodiment, the base end 13A is connected to the upper side of the rear leg portion 7. A rear end of the handle 13 is provided with a base end side flange 14 projecting obliquely upward from the front portion to the rear, and a grip portion 15 is provided laterally in the front-rear direction at the distal end 13B.

  Further, the second diameter B of the rear wheel 5 is larger than the first diameter A of the front wheel 4. In the embodiment, the second diameter B is more than twice the first diameter A (B> 2A). The first diameter A of the front wheel 4 is a diameter approximately corresponding to the conventional rear wheel, while the second diameter B of the rear wheel 5 is a diameter approximately corresponding to the conventional front wheel. The front wheel 4 includes a swivel portion 17 that is pivotably attached to the lower side of the front leg portion 6, a pair of left and right support yokes 18 projecting downward from the swivel portion 17, It is formed by a caster having a front wheel body 20 mounted rotatably at the lower end portion via a first rotation shaft portion 19 serving as a rotation center.

  Further, the rear wheel 5 is provided with a second rotation shaft portion 23 serving as a rotation center directed in the left-right direction through a spoke 22 at the center of a rear wheel main body 21 made of a tire. And this 2nd rotating shaft part 23 is provided in the center of the height direction of the rear leg part 7 so that free rotation is possible via a bearing (not shown). A hand rim 24 is integrally provided on the outer side of the rear wheel body 21.

  Further, an auxiliary handle 25 is provided on the chair portion 2 so as to protrude forward, that is, slightly in the traveling direction F and provided with a grip portion.

  In the embodiment, the handle 13 is provided on the rear side of the frame 3, but it may be provided on the rear side of the chair 2.

  Next, the operation of the above configuration will be described. The user X faces away from the traveling direction F, places his buttocks on the seat 9, puts his back on the back rest 10, and sits on the chair 2 with his legs placed on the foot plate 12. At this time, the user can sit in a comfortable posture by using the reclining mechanism 8C and tilting the backrest portion 10 as indicated by the alternate long and short dash line and placing the backrest.

  And caregiver Y stands behind the wheelchair and grasps and pushes grip portion 15 to advance the wheelchair in traveling direction F. At this time, since the user X is facing backward and the caregiver Y is facing forward, the two face each other and can see each other's faces, and therefore, the user X and the caregiver Y can feel secure. .

  In such a state where the wheelchair is in progress, for example, when climbing over a step, the grip 15 is pushed down, the rear wheel 5 comes into contact with the front wheel 4 and the front wheel 4 is lifted. The second rotary shaft 23 at the time of lifting is the center of rotation, and this center is arranged at a position higher than the front wheel 4, so that the length L between the grip 15 and the second rotary shaft 23 can be shortened. In particular, the height between the two can be shortened, and as a result, the center of rotation at the time of lifting is arranged near the grip part 15, so that the rising state accompanying the force application of the grip part 15 can be finely adjusted and used. It is possible to further reduce the possibility that the person X becomes anxious when going over the step.

  In order to move the wheelchair in the direction R opposite to the traveling direction F, the caregiver holds the auxiliary handle 25 and pushes the wheelchair to travel.

  As described above, in the embodiment, corresponding to claim 1, the chair portion 2 is provided rearward in the frame 1 provided with the front wheel 4 and the rear wheel 5 respectively in the front and rear, and the base end side 13A is fixed to the frame 1. By providing the handle 13 with the tip 13B facing rearward, the user X faces backward and faces the caregiver Y. Therefore, the user X and the caregiver Y can move with peace of mind. Can do. Then, by forming the rear wheel 5 to have a larger diameter than the front wheel 4, the length L between the handle 13 and the second rotating shaft portion 23, which is the center of the rear wheel 5, is reduced, and the hand gripping the grip portion 15. Since the second rotating shaft 23 can be brought closer to the front wheel 4, when the front wheel 4 is lifted around the second rotating shaft 23 with the wheelchair stopped, the grip 15 and the second rotating shaft 23 Since the second rotation shaft portion 23 is located near the hand, the lifting angle on the front wheel 4 side can be finely adjusted.

  In the embodiment, corresponding to claim 2, by providing the second rotation shaft portion 23 of the rear wheel 5 at a higher position than the first rotation shaft portion 19 of the front wheel 4, the grip portion 15 and the rear wheel 5 are provided. Since the rotation axis accompanying the lifting of the side becomes closer, the lifting angle on the front wheel 4 side can be finely adjusted.

  In the embodiment, corresponding to claim 3, the handle 13 includes a base end side rod 14 that is fixed to the rear side of the side frame 3 of the frame 1 and protrudes obliquely upward rearward, By having the grip portion 15 that extends to the end side collar 14 and protrudes laterally rearwardly, the grip portion 15 can be provided apart from the chair portion 2, so that the caregiver Y bends the waist. There is no such thing as pushing a wheelchair.

  In the embodiment, corresponding to the fourth aspect, when the front wheel 4 is a caster, when the handle 13 is pushed and moved in the desired direction, the wheelchair can be directed in the desired direction by the caster.

  In the embodiment, corresponding to claim 5, the second diameter B of the rear wheel 5 is formed to be twice or more the first diameter A of the front wheel 4, whereby the second rotating shaft. The interval between the portion 23 and the grip portion 15 can be reliably reduced.

  Moreover, in the said Example, according to Claim 6, by providing the auxiliary handle 25 to the chair part 2 toward the front, when a caregiver holds the auxiliary handle 25 and pushes a wheelchair, a user looks forward. And can move in the reverse direction R. The auxiliary handle 25 may be provided not on the chair portion 2 but on the frame 1.

  In the embodiment, corresponding to claim 7, the chair portion 2 is provided with a backrest portion 10 standing on the rear portion of the seat portion 9 via the reclining mechanism 8C. The user X can sit in a comfortable posture by tilting the section 10.

  As described above, the wheelchair according to the present invention can be applied to various uses. For example, the handle 13 and the auxiliary handle 25 may be foldable.

It is a perspective view from the back side which shows 1st Example of this invention. It is a perspective view from the same front side.

Explanation of symbols

1 Frame 2 Chair 3 Side frame 4 Front wheel 5 Rear wheel 8C Reclining mechanism
13 Handle
13A Base side
13B Tip
14 Base end side
15 Grip
19 First rotating shaft
23 Second rotating shaft
25 Auxiliary handle A 1st diameter B 2nd diameter

Claims (7)

  A frame having a front wheel and a rear wheel respectively provided in the front and rear is provided with a chair portion facing backward, and a front end side of a handle having a proximal end fixed to the frame or the chair portion is provided rearward, and the rear wheel is provided with the front wheel. A wheelchair characterized by being formed with a larger diameter.   The wheelchair according to claim 1, wherein the second rotation shaft portion of the rear wheel is provided at a position higher than the first rotation shaft portion of the front wheel.   The handle includes a base end side hook that is fixed to the rear side of the frame or the chair portion and protrudes obliquely upward and a grip portion that extends to the base end side hook and protrudes rearward. The wheelchair according to claim 1, wherein the wheelchair is provided on the tip side.   The wheelchair according to any one of claims 1 to 3, wherein the front wheel is a caster.   The wheelchair according to any one of claims 1 to 4, wherein the second diameter of the rear wheel is twice or more than the first diameter of the front wheel.   The wheelchair according to any one of claims 1 to 5, wherein an auxiliary handle is provided forward on the frame or the chair portion.   The wheelchair according to any one of claims 1 to 6, wherein the chair portion includes a seat portion and a reclining backrest portion standing on a rear portion of the seat portion.

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