JP2010158465A - Removable backrest - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a backrest easy to be installed on the existing backrest of a wheelchair or the like (namely, backrest on the part of a wheelchair) and used in comfort by the user. <P>SOLUTION: A removable backrest 10, installed on a backrest 21 prepared beforehand on the part of a chair 20 so that the chair height can extend upward, above the backrest 21 includes a backrest body 11 to be arranged on the front face of the backrest 21 and a fixing means 12 to fix the backrest body 11 to the chair backrest 21. A protrusion 11a is provided protruding downward from the bottom edge of the backrest body 11. For fixing the backrest body 11 to the chair backrest 21, the downward protrusion 11a can be inserted into the clearance between the seat plate 22 and the backrest 21 of the chair 20. This can restrain the rattling of the removable backrest 10 and permits the user to use the backrest 10 comfortably. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a detachable backrest that can be attached to an existing backrest (chair side backrest) provided in advance in a chair.

  Headrests for leaning the head are provided in various chairs such as vehicle chairs, desk chairs, seat chairs, and wheelchairs. Especially in automobile seats, when the vehicle body is impacted by a rear-end collision, the head of the rider's head may tilt backwards and cause whiplash or damage to the cervical spine. In many countries, it is officially called “head tilt restraint device”.)

  However, most of the wheelchairs, except for some luxury items, have a low backrest, and most of them can only be drowned to the vicinity of the scapula of the person seated on them. For this reason, a person sitting in a wheelchair may not be able to droop his head to the back, but if he / she sits in a wheelchair and rides in a car, he / she may suffer from whiplash and / or hurt the cervical spine. there were.

  In view of this situation, a detachable headrest that can be attached to a wheelchair handle frame or the like has been proposed (for example, Patent Document 1). However, this type of detachable headrest is unpopular with the elderly and women because of its complicated structure and difficult installation. Also, the range in which the height of the headrest can be adjusted is limited, and there were many children who could not bring the headrest to the position of a small elderly head or a small elderly head that the head finally peeks from the back of the wheelchair. .

  By the way, a detachable backrest that has been proposed so that the head at a higher position than the existing backrest can be drowned by being attached to the existing backrest of the wheelchair (for example, Patent Document 2). However, with this type of detachable backrest, it is difficult to fix the wheelchair against the existing backrest of the wheelchair, and the detachable backrest may fall back and forth or tilt to the left or right.

JP 2001-293036 A Utility Model Registration No. 3132201

  The present invention has been made to solve the above-described problems, and can be easily attached to an existing backrest (chair side backrest) in a chair such as a wheelchair, and a headrest is attached. Can be used comfortably from people with high to low seats, and can be fixed stably so that it does not wobble against the chair back, making it comfortable for the user It provides a removable backrest that can be used.

  The above problem is a detachable backrest that can be extended to a position higher than the chair-side backrest by attaching it to the chair-side backrest provided in advance in the chair, A backrest body arranged on the front side of the backrest, and a backrest fixing means for fixing the backrest body to the chair backrest, with the lower edge of the backrest body projecting downward Protruding portions are provided, and when the backrest main body is fixed to the chair side backrest, the downward projecting portion can be inserted into the gap between the seat plate of the chair and the chair side backrest. It is solved by providing a removable backrest to do. Thereby, it becomes possible to fix the detachable backrest to the chair side backrest in a state in which the lower portion thereof does not swing back and forth, and it is possible to provide comfort to the user.

  In the detachable backrest of the present invention, the structure of the backrest body is not particularly limited. For example, a rigid plate such as a hard resin plate, or a cover covered on the rigid plate may be used. Although it is good, it is preferable to be comprised by the substantially cyclic | annular cyclic | annular flame | frame which forms the outer edge, the cover for coat | covering an cyclic | annular frame, and the backrest cushion accommodated inside this cover. This not only gently supports the user's back while maintaining the shape retention of the backrest body, but also improves the stability of the detachable backrest when mounted on the chair backrest as described later. Since various ideas for improvement can be easily applied, further comfort can be provided to the user. Further, the backrest body can be reduced in weight so that the removable backrest can be easily handled, and the manufacturing cost of the removable backrest can be reduced.

  The backrest fixing means is not particularly limited as long as the backrest main body can be fixed to the chair side backrest, but a backrest fixing belt having a pair of fixing portions at both ends thereof, and the backrest fixing belt is used. It is preferable that the backrest body is fixed to the chair backrest by hanging around the backrest body and the chair backrest and fixing the pair of fixing portions to each other. Thereby, it becomes possible to fix firmly so that a backrest main body does not wobble back and forth with respect to a chair side backrest, and the stability of a detachable backrest can further be improved. Therefore, it becomes possible to provide the user with further comfort. In addition, it is possible to fix the detachable backrest to the chair backrest without using bolts, etc., so even if you are not good at handling the machine, you can intuitively install the detachable backrest. It can also be fixed to the backrest.

  The detachable backrest of the present invention includes a detachable cushion attached in a state of protruding to the front side of the backrest main body, and at least selected from the user's head, side, waist or buttocks by the detachable cushion. It is preferable that one body part can be supported. Thereby, it becomes possible to maintain a specific body part of the user in an appropriate posture, reduce the burden on the user's body, and provide further comfort to the user. This configuration is particularly suitable when the detachable backrest of the present invention is used for a wheelchair.

  In this case, the attachment structure of the detachable cushion is not particularly limited as long as it is detachable, but a belt loop or a hook and loop fastener is provided on the back side of the detachable cushion, and the belt loop is fixed to the backrest or the backrest body. Other belts that are hung around (including belts that have the same structure as the backrest fixing belt, but do not hang around the chair backrest when used, and do not contribute to the stability of the removable backrest )) Or by attaching the hook-and-loop fastener to a hook-and-loop fastener provided on a back-rest fixing belt or other belt that is hung around the back-rest main body, and attaching and detaching the hook-and-loop fastener to the front side of the back-rest main body. It is preferable that a type cushion can be attached. This makes it possible to achieve both ease of attaching and detaching the detachable cushion and mounting strength. Therefore, it becomes possible to provide the user with further comfort.

  The place where the downward projecting portion is provided is not particularly limited as long as it is the lower edge of the backrest main body, but the downward projecting portion is preferably provided at the center of the lower edge of the backrest main body. By adopting such a configuration, it becomes possible to form a horizontal portion at both lower edges of the backrest main body, and when the backrest main body is fixed to the chair side backrest, the left and right provided in the chair in advance A pair of seat plate frames (a pair of left and right seat plate frames for supporting the left and right edges of a chair seat plate in the front-rear direction. Chair seats such as wheelchairs are provided with such seat plate frames. It is also possible to place the horizontal portion on each of them. Therefore, it is possible to provide the user with further comfort by preventing the detachable backrest from shaking from side to side. Left and right rattling of the detachable backrest can also be prevented by providing a rattling-preventing cushion at both ends of the lower edge of the annular frame.

  The shape of the annular frame used for the backrest body is not particularly limited as long as the shape of the backrest body can be maintained, but the upper frame forming the upper edge, the left edge and the right edge of the backrest body. A lower frame that forms the downward projecting portion, a left connecting member that connects a lower left edge of the upper frame and a left end of the lower frame, and a lower right edge of the upper frame and a right edge of the lower frame It is preferable that a horizontal portion is formed on the lower surface of the left connecting member and the right connecting member. As a result, when the backrest body is fixed to the chair side backrest, the horizontal portion can be placed on each of the pair of left and right seat plate frames provided in advance in the chair, and the left and right sides of the detachable backrest can be mounted. It becomes possible to suppress rattling. Therefore, it becomes possible to provide the user with further comfort.

  At this time, it is preferable that the left connecting member and the right connecting member are each provided with a forward projecting portion projecting forward. Accordingly, when the backrest body is fixed to the chair backrest, the lower surface of the forward projecting portion can be placed along each of the pair of left and right seat plate frames. It becomes possible to further suppress rattling. Therefore, it becomes possible to provide the user with further comfort.

  As described above, according to the present invention, it is possible not only to easily attach to an existing backrest (chair side backrest) in a chair such as a wheelchair, but also to have a wide range in which a headrest or the like can be attached, It can be used comfortably from high to low people, and can be stably fixed so that it does not wobble against the chair side backrest, so that the user can use the removable backrest comfortably. It becomes possible to provide.

It is the perspective view which showed a mode that the detachable backrest which concerns on Example 1 of this invention was mounted | worn with a wheelchair. It is the perspective view which showed the state which mounted | wore the wheelchair with the removable backrest which concerns on Example 1 of this invention. It is the perspective view which showed the cyclic | annular frame in the detachable backrest which concerns on Example 1 of this invention. It is the front view which showed the cyclic | annular flame | frame in the detachable backrest which concerns on Example 1 of this invention. It is the side view which showed the cyclic | annular flame | frame in the detachable backrest which concerns on Example 1 of this invention. It is the perspective view which showed the cyclic | annular frame in the detachable backrest which concerns on Example 2 of this invention.

  Hereinafter, embodiments of the detachable backrest of the present invention will be described in detail based on each example. Below, the case where the removable backrest of this invention is mounted | worn with respect to a wheelchair is demonstrated. However, the detachable backrest of the present invention is not limited to a wheelchair, and can be used for chairs other than wheelchairs, such as pipe chairs, as long as there is a gap between the seatboard and the seatboard backrest. it can.

  First, the detachable backrest according to the first embodiment of the present invention will be described. FIGS. 1-5 is the figure which showed the detachable backrest 10 which concerns on Example 1 of this invention. As shown in FIGS. 1 and 2, the detachable backrest 10 of the first embodiment fixes the backrest body 11 disposed on the front side of the chair-side backrest 21 and the backrest body 11 to the chair-side backrest 21. It is provided with a backrest fixing means 12 for carrying out, and by mounting on a chair side backrest 21 provided in advance in the wheelchair 20 (chair), the chair backrest 21 is positioned higher than the chair backrest 21. The backrest can be extended. A downward projecting portion 11 a projecting downward is provided at the lower edge of the backrest main body 11, and when the backrest main body 11 is fixed to the chair side backrest 21, the downward projecting portion 11 a is used as a seat plate of the wheelchair 20. 22 and the chair side backrest 21 can be inserted into the gap. You may make it possible to attach the umbrella and roof used as a sunshade or rain protection to the backrest main body 11. FIG.

  The backrest body 11 is accommodated inside the substantially annular ring frame F (FIGS. 3 to 4) forming the outer edge, a cover C (FIGS. 1 and 2) for covering the ring frame F, and the cover C. And a backrest cushion (not shown). The annular frame F is usually formed by connecting a plurality of bar members (such as pipes) by various connection members such as joint pipes, welding, or the like. As shown in FIG. 5, the upper portion of the annular frame F (the portion protruding upward from the chair-side backrest 21) is slightly along the rear, so that the user of the detachable backrest 10 is easy. The posture can be taken. Further, as shown in FIG. 4, horizontal portions A are formed on the lower surfaces of both ends of the lower edge of the annular frame F. When the backrest main body 11 is fixed to the chair side backrest 21, these horizontal portions A are in a state of being placed on each of a pair of left and right seat plate frames 22 a provided in advance in the wheelchair 20. For this reason, the stability of the detachable backrest 10 when mounted on the chair side backrest 21 can be enhanced. A backlash preventing cushion (not shown) may be provided on the lower surface of the horizontal portion A at both lower edges of the annular frame F.

  The cover C has a bag-like shape having an insertion opening for accommodating the annular frame F (not shown. The insertion opening is usually provided in a place where it can be closed by a fastener and is not easily noticeable). It has become a thing. The cover C is usually formed using a synthetic resin sheet, cloth or leather. The backrest cushion may be accommodated in only a part of the inside of the cover C, but in the detachable backrest 10 of the first embodiment, it is accommodated in substantially the entire inside of the cover C. The back cushion is made of a material having excellent elasticity, such as soft urethane foam, formed into a thick, substantially plate-like shape, and is fixed in position by being fixed to the inner surface of the cover C. Since the backrest body 11 has such a structure, the user's back can sink slightly backward, so that a person seated in the wheelchair 20 moves the wheel of the wheelchair 20 forward. It is also possible to facilitate the rotation operation (operation to push the hand forward). On the contrary, if the upper body of a person seated in the wheelchair 20 is turned forward, it is difficult to push the hand forward.

  The height of the backrest body 11 (the height of the portion excluding the downward projecting portion 11a) is not particularly limited as long as it is higher than the height of the chair backrest 21 of the wheelchair 20 (generally, about 40 cm). If it is too low, the significance of using the detachable backrest 10 of the present invention decreases. For this reason, the height of the backrest main body 11 is normally 60 cm or more. The height of the backrest main body 11 is preferably 70 cm or more, and more preferably 80 cm or more. On the other hand, when the backrest main body 11 is too high, there is a risk of blocking the field of vision of the person who pushes the wheelchair 20 from behind. For this reason, the height of the backrest main body 11 is normally 120 cm or less. The height of the backrest body 11 is preferably 110 cm or less, and more preferably 100 cm or less.

  The form of the downward projecting portion 11a is not particularly limited, but is preferably a shape without corners. Thereby, even if the downward projecting portion 11a comes into contact with the chair-side backrest 21 and the seat plate 22 of the wheelchair 20, the chair-side backrest 21 and the seat plate 22 can be prevented from being damaged. In the detachable backrest 10 of the first embodiment, as shown in FIG. 1, a substantially semicircular plate shape in front view provided at the center of the lower edge of the backrest main body 11 is used. The thickness of the downward projecting portion 11 a is set to be smaller than the gap between the seat plate 22 of the wheelchair 20 and the chair side backrest 21. In a general wheelchair 20, the width in the front-rear direction of the gap between the seat plate 22 and the chair-side backrest 21 is about 5 to 6 cm, so the thickness of the downward protrusion (the thickness of the downward protrusion depends on the location) If different, the maximum value) is preferably about 1 to 5 cm. In the detachable backrest of the first embodiment, the downward projecting portion 11a is formed so as to gradually become thinner from the base end (upper end) to the front end (lower end) as shown in FIG. For this reason, it is easy to insert the downward projecting portion 11a into the gap. Such a shape can be realized by crushing or cutting a corresponding portion in the annular frame F.

  Further, the height of the downward projecting portion 11a in the backrest main body 11 is not particularly limited, but if it is too low, the downward projecting portion 11a may be easily removed from the gap between the seat plate 22 of the wheelchair 20 and the chair side backrest 21. is there. For this reason, the height of the downward protrusion part 11a is normally 2 cm or more. The height of the downward projecting portion 11a is preferably 5 cm or more, and more preferably 7 cm or more. On the other hand, if the downward projecting portion 11a is too high, it may be difficult to insert the downward projecting portion 11a into the gap. For this reason, the height of the downward protrusion part 11a is normally 20 cm or less. The height of the downward projecting portion 11a is preferably 17 cm or less, and more preferably 15 cm or less.

  In the detachable backrest 10 of the first embodiment, the backrest fixing means 12 is a backrest fixing belt having a pair of fixing portions (not shown) at both ends thereof. Accordingly, as shown in FIGS. 1 and 2, the backrest fixing belt 12 is hung on both the backrest main body 11 and the chair side backrest 21 and the pair of fixing portions are fixed to each other, whereby the backrest main body 11 is secured. Can be fixed to the chair back 21. For this reason, the backrest main body 11 does not float from the front surface of the chair side backrest 21. The backrest fixing belt 12 is fixed to the backrest body 11 together with the chair backrest 21 below the upper edge of the chair backrest 21 in the backrest body 11. A detachable cushion 14 (waist support) described later can be attached to the backrest fixing belt 12 in a state of protruding to the front side of the backrest main body 11. It is preferable that the backrest fixing belt 12 is formed entirely or partially with a stretchable material such as rubber. Accordingly, it is possible to increase the tightening force of the backrest fixing belt 12 and firmly fix the backrest body 11 to the chair side backrest 21.

  By the way, the detachable backrest 10 of the first embodiment also includes another belt 13 having the same structure as the backrest fixing belt 12 as shown in FIGS. A removable head cushion 15 (headrest) can be attached to the other belt 13 in a state of protruding from the front side of the backrest main body 11. In FIG. 2, the other belt 13 is fixed to the backrest main body 11 above the upper edge of the chair backrest 21 in the backrest main body 11, and is hung around the chair side backrest 21. However, the height at which the other belt 13 is fixed is not limited to this, and can be appropriately changed according to the height of the user's head. When the other belt 13 is fixed at a height lower than the upper edge of the chair side backrest 21 in the backrest main body 11, the other belt 13 is attached to the chair side in the same manner as the backrest fixing belt 12. When it is also hung around the backrest 21, the stability of the detachable backrest 10 can be further enhanced. The other belts 13 may be provided with a plurality of belts instead of only one, and each may be provided with a detachable cushion for supporting different body parts (sides, buttocks, etc.).

  The structure for attaching the various detachable cushions 14 and 15 to the backrest fixing belt 12 and other belts 13 is not particularly limited. For example, a surface fastener (not shown) is provided on the back side of the detachable cushions 14 and 15. The hook-and-loop fastener may be fixed to another hook-and-loop fastener (not shown) provided on the backrest fixing belt 12 or other belt 13. In this case, however, clothes or hair of a person sitting on the wheelchair 20 may be entangled with the other surface fasteners. Further, the detachable cushions 14 and 15 may come off. For this reason, in the detachable backrest 10 of the first embodiment, a belt loop L (FIG. 1) is provided on the back side of the detachable cushions 14 and 15, and the backrest fixing belt 12 and other belts 13 are provided on the belt loop L. It is made to attach to the detachable backrest 10 by passing. Accordingly, for example, even when the vehicle is placed on the wheelchair 20 while being seated and the vehicle is shocked by a collision or the like, the removable cushions 14 and 15 are prevented from being detached. It becomes possible.

Subsequently, a description will be given of the detachable backrest according to the second embodiment of the present invention. FIG. 6 is a perspective view showing the annular frame F in the detachable backrest 10 according to the second embodiment of the present invention. The removable backrest 10 of the second embodiment, as shown in FIG. 6, the annular frame F, the upper edge of the backrest body 11, and the upper frames F ₁ to form the left edge and right edge, a downward projecting portion 11a a lower frame F ₂ to form a left connection member F ₃ connecting the left edge lower end of the upper frames F ₁ and the left end of the lower frame, the upper frames F ₁ of the right edge lower end and the lower frame F ₂ the right end It is composed of a right connecting member F ₄ for connecting and. The lower surface of the left connection member F ₃ and right connecting member F _4, the horizontal portion A is formed. These horizontal portions A can be placed on each of a pair of left and right seat plate frames 22 a provided in advance in the wheelchair 20 when the backrest body 11 is fixed to the chair backrest 21.

In addition, in the detachable backrest 10 of the second embodiment, as shown in FIG. 6, forward projecting portions B projecting forward are formed on each of the left connecting member F ₃ and the right connecting member F ₄ . The lower surfaces of these forwardly projecting portions B are formed horizontally. When the backrest body 11 is fixed to the chair-side backrest 21, the lower surfaces of the forwardly projecting portions B are respectively connected to the left and right seat plate frames 22 a. Can be placed along. For this reason, the stability of the detachable backrest 10 when mounted on the chair-side backrest 21 can be further improved. The other configuration of the detachable backrest 10 according to the second embodiment is substantially the same as that of the detachable backrest 10 according to the first embodiment described above, and a detailed description thereof is omitted.

DESCRIPTION OF SYMBOLS 10 Detachable backrest 11 Backrest main body 11a Downward projecting part 12 Backrest fixing belt (backrest fixing means)
13 Other belts 14 Waist support (detachable cushion)
15 Headrest (detachable cushion)
20 Wheelchair (chair)
21 Seat back 22 Seat plate 22a Seat plate frame A Horizontal portion B Forward projection C Cover F Ring frame F ₁ Upper frame F ₂ Lower frame F ₃ Left connection member F ₄ Right connection member L Belt loop

Claims (9)

It is a detachable backrest that can be extended to a position higher than the chair back by attaching it to the chair back provided in advance in the chair,
A backrest body arranged on the front side of the chair backrest and a backrest fixing means for fixing the backrest body to the chair backrest, and projecting downward on the lower edge of the backrest body A downward projecting portion is provided, and when the backrest body is fixed to the chair side backrest, the downward projecting portion can be inserted into a gap between the seat plate of the chair and the chair side backrest. Detachable backrest.   The attachment / detachment according to claim 1, wherein the backrest body includes a substantially annular ring frame forming an outer edge thereof, a cover for covering the ring frame, and a backrest cushion accommodated inside the cover. Expression back.   The backrest fixing means is a backrest fixing belt having a pair of fixing portions at both ends thereof, and the pair of fixing portions are fixed to each other by hanging the backrest fixing belt around the backrest main body and the chair side backrest. The detachable backrest according to claim 1 or 2, wherein the backrest main body can be fixed to the chair side backrest.   A detachable cushion attached in a protruding state to the front side of the backrest main body, and supporting at least one body part selected from the user's head, side, waist or buttocks by the detachable cushion; The detachable backrest according to any one of claims 1 to 3, which can be used.   A belt loop or hook-and-loop fastener is provided on the back side of the detachable cushion, and the hook-and-loop fastener is fixed by passing the belt loop through the belt-rest fixing belt or other belt hung around the backrest body. 5. The detachable cushion can be attached to the front side of the backrest body by being fixed to another hook-and-loop fastener provided on another belt or other belt wound around the backrest body. Detachable backrest as described.   The downward projecting portion is provided at the center of the lower edge of the backrest body, horizontal portions are formed at both ends of the lower edge of the backrest body, and the chair is provided in advance when the backrest body is fixed to the chair side backrest. The detachable backrest according to claim 1, wherein the horizontal portion can be placed on each of a pair of left and right seat plate frames.   The removable backrest according to any one of claims 2 to 6, wherein a cushion for preventing rattling is provided at both ends of the lower edge of the annular frame.   An annular frame connects the upper frame forming the upper edge, the left edge and the right edge of the backrest body, the lower frame forming the downward projecting portion, the lower left edge of the upper frame and the left edge of the lower frame The left connecting member and the right connecting member connecting the lower right edge of the upper frame and the right end of the lower frame are formed, and horizontal portions are formed on the lower surfaces of the left connecting member and the right connecting member, so that the backrest is formed. The detachable back according to any one of claims 2 to 7, wherein when the main body is fixed to the chair side backrest, the horizontal portion can be placed on each of a pair of left and right seat plate frames provided in advance in the chair. Drowning.   Each of the left connecting member and the right connecting member has a forward projecting portion projecting forward, and when the backrest main body is fixed to the chair side backrest, the lower surface of the forward projecting portion is set to each of the pair of left and right seat plate frames. The detachable backrest according to claim 8, wherein the detachable backrest can be placed along the head.

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