JP2006246990A - Reclining wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reclining wheelchair which does not make a sitting person tired even when the sitting person sits on the wheelchair for a long time and allows the sitting person to feel comfortable in a stable posture when the wheelchair is reclined. <P>SOLUTION: The reclining wheelchair 100 has a tilt fulcrum 16 pivoting almost middle section of a seat frame 13 foldably, a reclining fulcrum 21 pivoting the rear end section of the seat frame 13 and the backrest frame 17 rotatably, and an extending and contracting member arranged between the backrest frame 17 and a lower frame 27. The lower end section of the backrest frame 17 is installed on a slide rail 23 slidably. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a reclining wheelchair in which a seat frame is provided with a tilt fulcrum and a reclining fulcrum between the seat frame and the back frame.

  For assisting wheelchairs, when a occupant is placed on a wheelchair from the bed or moved to the bed, the wheelchair should be leveled or flat with the bed, or a occupant who has been in the wheelchair for a long time. To rest, you have to recline. In particular, when sitting for a long time, a reclining wheelchair that can take a posture as easy as possible is desirable. For this purpose, various reclining wheelchairs have been devised.

  Patent Document 1 discloses a reclining wheelchair that can recline a user's posture without changing the angle between the upper and lower body with the hip joint as a boundary, thereby maintaining the stability of the user's body. . The seating part of the reclining wheelchair of Patent Document 1 is composed of a front seating part and a rear seating part, and the rear seating part is inclined in multiple stages by bolts or pinning with respect to the front seating part. Yes. Therefore, it can incline backward with a back seat part from a rear seat part. At this time, the posture of the user can be reclined by changing the angle between the upper body and the lower body with the hip joint as a boundary. Therefore, since the user's buttocks fall well into the inclined rear seat, the body is prevented from sliding forward even when the angle between the upper body and the lower body is increased.

  The tilt-type wheelchair of Patent Document 2 has a pair of left and right side base frames in which a main axle is attached to the rear part and casters are attached to the front part, and left and right sides that are rotatably mounted on the side base frames. It consists of a pair of tilt side frames, and a seat cloth is passed to the upper end of the X link frame between the pair of left and right tilt side frames, so that it does not interfere with the seat cloth when folded like a conventional tilt type wheelchair. There is no problem, the height of the seat cloth can be set to an optimum position lower than that of the conventional one, and the rotation radius of the tilt side frame can be increased.

In Patent Document 1 and Patent Document 2, there is a drawback that the reclining wheelchair tends to slip forward when the backrest is tilted and rests, and ingenuity has been devised to compensate for such a drawback. For example, as disclosed in Patent Document 1, the rear seating portion is inclined in a plurality of stages by bolts or pinning with respect to the front seating portion. However, in order to incline in a plurality of stages by bolts and pinning in this way, it has to be adjusted in advance without a seated person, which is very troublesome. Therefore, there has been a demand for the appearance of a wheelchair that can be easily reclined without the hips being displaced even when the occupant is in the vehicle.
JP 2001-149413 A JP 2002-126209 A

  An object of the present invention is to provide a reclining wheelchair that does not get tired even if a seated person sits for a long time and can relax in a stable posture when reclining.

  As a result of intensive studies to solve the above problems, a wheelchair that provides a reclining wheelchair that can take a stable posture by providing a tilt fulcrum and a reclining fulcrum has been successfully created.

  A first feature of the present invention is that a tilt fulcrum pivotally attached to a substantially middle portion of the seat frame so that it can be bent, a reclining fulcrum pivotally attached to the back frame, and a back fulcrum pivotally attached to the back frame. A reclining wheelchair in which an elastic member is attached between a frame and a lower frame, wherein the lower end portion of the backrest frame is slidably attached to a slide rail. A tilting fulcrum is provided by pivotally mounting the substantially middle part of the seat frame so that it can be bent, and a reclining fulcrum is provided by pivoting the rear end of the seat frame below the backrest frame to slide the end of the back frame. It was slidably attached to the rail. As a result, when the wheelchair is reclined, the back is tilted while receiving the buttocks of the occupant, so that the occupant is prevented from slipping forward during reclining.

  The second feature of the present invention is that a tilt fulcrum pivotally attached to a substantially intermediate portion of the seat frame so that it can be bent, a reclining fulcrum pivotally attached to the back frame of the rear end of the seat frame, and a backrest. A reclining wheelchair in which a telescopic member is installed between the frame and the lower frame, and the lower end of the backrest frame is slidably attached to the slide rail, and a fall prevention device is mounted behind the rear wheel. A reclining wheelchair characterized by By mounting the fall prevention device behind the rear wheel, the reclining angle can be widened with peace of mind without falling backwards even when reclining.

  A tilting fulcrum is provided by pivotally mounting the substantially middle part of the seat frame so that it can be bent, and a reclining fulcrum is provided by pivoting the rear end of the seat frame below the backrest frame to slide the end of the back frame. It was slidably attached to the rail. As a result, when the wheelchair is reclined, the back is tilted while receiving the buttocks of the occupant, so that the occupant is prevented from slipping forward during reclining. Furthermore, by mounting a fall prevention device behind the rear wheel, it is no longer possible to fall backward even when reclining.

  Although the reclining wheelchair of this invention is demonstrated below using drawing, the reclining wheelchair of this invention is not limited to a following example.

  As shown in FIG. 1, the reclining wheelchair 100 of the present invention is illustrated as an assisting wheelchair. The reclining mechanism installed in the assisting wheelchair exemplified here can be installed in a self-propelled wheelchair, and is not limited to the assisting wheelchair. A wheelchair seat frame 13 having a footrest 11 supported by a caster 28 and a footrest frame 12 at the front part is pivotally mounted in the middle to the rear half part, and this pivoted part is defined as a tilt fulcrum 16. A center frame 25 is attached to one end of the slide rail 23 from between the tilt fulcrum 16 and the armrest support portion 14 downward. By installing the center frame 25, the seat frame 13 and the slide rail 23 can be reinforced. The other end of the frame pivotally mounted as a tilt fulcrum 16 in the middle of the seat frame 13 is pivotally mounted on the lower end of the backrest frame 17 to become a reclining fulcrum 21. The end portion of the backrest frame 17 is pivotally attached between the slide rails 23 by means of bolts and nuts. At one position of the reclining fulcrum 21 of the back frame 17 or below the reclining fulcrum 21, one end of the elastic member 22 is rotatably attached, and the other end of the elastic member 22 is rotatably attached to the lower support frame 26. Set up.

  The telescopic member used here can be used as a member that can stop the wheelchair at an appropriate angle by widening the angle of the backrest from the normal use state to the reclining state. A telescopic member that can be used for such a purpose can be used to return the wheelchair to the reclining state and to the original state by tilting it backward from the state where the backrest of the wheelchair is set up or stopping in the middle. The member is a member that supports the backrest. For example, a gas damper, a mechanical lock mechanism, etc. can be illustrated.

  FIG. 2 is a view showing the reclining wheelchair 100 in a reclining state. When the reclining grip 20 attached under the handle 19 is gripped toward the handle 19, the elastic member 22 is released, and the backrest frame 17 can be tilted backward or returned to its original position. When the backrest frame 17 is tilted, the end portion of the backrest frame 17 loosely fitted to the slide rail 23 slides in the slide rail 23. When the slide rail 23 is not provided, the stretchable member 22 receives all the weight applied to the back frame 17 from the rear half of the seat, and the stretchable member 22 must be thick and strong. In contrast, by installing the slide rail 23, the weight applied to the back frame 17 from the rear half of the seat can be dispersed. Further, when there is no reclining fulcrum 21, if the reclining angle is increased only by the tilt fulcrum 16, the occupant's buttocks are placed in an unstable state, and the reclining angle is also limited. On the other hand, by installing the reclining fulcrum 21, the occupant's buttocks are placed between the tilt fulcrum 16 and the reclining fulcrum 21 in a stable state, and even if the wheelchair is in the reclining state, the occupant There is no worry about falling forward. As a result, the reclining angle can be tilted up to approximately 140 degrees.

  FIG. 3 is a perspective view showing the relationship between the tilt fulcrum 16 and the reclining fulcrum 21, the expansion member 22 and the like from the inside of the wheelchair. An X bar 31 for folding the wheelchair is attached near the front of the wheelchair. The outer frame is an armrest 15 and can be lowered to the same height as the seat of the wheelchair so that the occupant can be transferred to a bed or the like. The seat frame 13 between the armrest 15 and the X bar 31 is pivotally mounted at its middle to the latter half so that it can be pivoted. A center frame 25 is attached to one end of the slide tray 23 downward from between the tilt fulcrum 16 and the armrest support portion 14. By attaching the center frame 25 to one end of the slide rail 23 in this manner, the seat frame 13 and the slide rail 23 can be reinforced. The other end of the frame pivotally mounted at one end as a tilt fulcrum 16 in the middle of the seat frame 13 is pivotally mounted at the lower end of the backrest frame 17 to become a reclining fulcrum 21. The end of the back frame 17 is loosely fitted between the slide rails 23 with bolts and nuts. One end of the elastic member 22 is rotatably attached at the same position as the reclining fulcrum of the backrest frame or below the reclining fulcrum, and the other end of the elastic member 22 is rotatably attached to the lower support frame 26. The stopper 33 of the expansion / contraction member 22 is connected by a wire from a reclining grip 20 attached under the handle 19.

  FIG. 4 is a perspective view showing a loosely fitted state of the slide rail 23 and the end portions of the backrest frame 17. The end portion of the back frame 17 having the reclining fulcrum 21 is axially attached to the slide rail 23 so as to be slidable with bolts and nuts so as to slide obliquely downward from above. The lower end portion of the slide rail 23 is firmly supported by the lower frame 27.

  FIG. 5 is a partial side view illustrating a part of the reclining wheelchair 200 attached with the fall prevention mechanism 30 and the fall prevention mechanism. The fall prevention mechanism 30 is a hindrance when the wheelchair is moved forward or backward, and is therefore placed slightly above the ground contact surface of the main wheel 24 so as not to prevent the rotation of the main wheel 24. In addition, when the wheelchair is reclined, it is used to stabilize the wheelchair by receiving the weight applied to the rear when tilting backward, so a sturdy pipe is used.

  FIG. 6 is a partial side view illustrating a part of the reclining wheelchair 200 with the fall prevention mechanism 30 having a small wheel and the fall prevention mechanism. An example in which a fall prevention mechanism having small wheels is attached to the fall prevention mechanism 30 shown in FIG. Compared with the pipe overturn prevention mechanism of FIG. 5, there is an advantage that the wheelchair can be moved back and forth even in the reclining state. However, if left in the reclining state, it is dangerous to move on a slope or the like, so it is desirable to provide a brake on the small wheel or the main wheel. In any of the above examples, the fall prevention mechanism 30 can be kicked up if the fall prevention mechanism 30 is not necessary when the wheelchair is moved or delivered.

It is a side view which shows a reclining wheelchair. It is a side view which shows the reclining wheelchair made into the reclining state. It is a fragmentary perspective view which shows the tilt fulcrum and reclining fulcrum of a reclining wheelchair. It is a fragmentary perspective view which shows the attachment state of the slide rail of a reclining wheelchair. It is a partial side view of the reclining wheelchair which attached the fall prevention mechanism. It is a partial side view of the reclining wheelchair which attached the fall prevention mechanism.

Explanation of symbols

100: Reclining wheelchair 200: Reclining wheelchair with overturn prevention 11: Footrest 12: Footrest frame 13: Seat frame 14: Armrest support 15: Armrest 16: Tilt fulcrum 17: Backrest frame 18: Headrest 19: Handle 20: Reclining grip 21 : Reclining fulcrum 22: Telescopic member 23: Slide rail 24: Main wheel 25: Center frame 26: Lower support frame 27: Lower frame 28: Caster 29: Front frame 30: Fall prevention mechanism 31: X bar 32: Brake 33: stopper

Claims (2)

  Tilt fulcrum pivotally attached to a substantially intermediate portion of the seat frame, a reclining fulcrum pivotally attached to the back frame, and a telescopic member between the back frame and the lower frame. A reclining wheelchair in which a lower end portion of a backrest frame is slidably attached to a slide rail.   Tilt fulcrum pivotally attached to a substantially intermediate portion of the seat frame, a reclining fulcrum pivotally attached to the back frame, and a telescopic member between the back frame and the lower frame. A reclining wheelchair in which the lower end portion of the backrest frame is slidably attached to the slide rail, and a fall prevention device is mounted behind the rear wheel.

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