JP2006055525A - Backrest for chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new backrest for a chair, which is placed ahead of a backrest of a wheelchair, an ordinary chair, a car seat or the like, supports the back of a sitting person stably and comfortably and supports his/her both sides as if it hugs them. <P>SOLUTION: The backrest is formed flat and mostly concave of a support plate member 2 equipped with a back support part 2a which supports the back of a sitting person, side support parts 2b, 2c integrally formed from both right/left sides of the back support part 2a and a cutout 3 of almost U shape or a hole shape in the back support part 2a, and a cushion member 4 integrally formed allover the face at least on the front face side of the plate member 2, and is used by being placed ahead of the backrest of the chair. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a chair backrest that is placed in front of a backrest of a wheelchair, a normal chair, an automobile seat or the like and stably supports a seated person from the back and both sides.

  The backrest of a chair, particularly a wheelchair, is usually provided so as to be substantially vertically or slightly tilted upward from the rear of the seat plate. Therefore, depending on the seated person, the lumbar portion may be the lower end of the backrest. It may fall to the side and the posture may collapse forward, resulting in back pain. Also, if you sit deeply in a wheelchair, your spine may extend too much and you may get tired if you sit for a long time.

  Furthermore, since a wheelchair is not usually designed to support both sides of a seated person, the seating posture will naturally shift to the left or right depending on the person's physical characteristics, or due to a decrease in back muscle strength. The seated person who tends to lose balance is forced to hold his arm on one armrest with the upper body tilted to the left or right, and is not only very tired, There was a problem that it caused a secondary obstacle that the bones were scoliosis.

  Therefore, Patent Document 1 proposes a body position holding holder that is used by being placed on a seat plate of a wheelchair or a normal chair. The position holding holder according to this proposal is made of thermoplastic elastomer material according to the back line when a person sits on a chair etc., and the headrest and side holder can be freely expanded and contracted according to their body shape, Moreover, it can be removed.

  However, the posture holding holder proposed in Patent Document 1 is formed in accordance with the line of the back, but when a person with a back of the back is used, the portion of the back of the circle hits the holder body. There were problems such as getting painful. Further, since the side holder is point-supported on the left and right sides of the holder body, there is a problem that the entire side cannot be supported.

  Patent Document 2 proposes a side support that supports the side of a person sitting in a wheelchair. The side support according to this proposal is configured to be detachably attached to a back pipe of a wheelchair. However, there is no structure that supports the back, and there is a problem that the user feels uncomfortable because it is fixed so that the upper body is pressed against the back.

Further, Patent Document 3 proposes an auxiliary cushion for a wheelchair, but the auxiliary cushion according to this proposal has a problem that it is unusable because it is configured to be attached to a wheelchair.
JP 2000-333771 A JP 2003-204996 A JP 2001-46438 A

  The present invention is a new chair back that is placed in front of a backrest of a wheelchair, a normal chair, an automobile seat, etc., stably supports the seated person's back without feeling uncomfortable, and stably supports both sides. The challenge is to provide a rest.

  The structure of the present invention, which has been made for the purpose of solving the above-mentioned problems, is formed in a back support part that supports the back of the seated person, a side support part that is integrally formed from the left and right sides of the back support part, and the back support part. The support plate member provided with the substantially U-shaped or hole-like notch and the cushioning member integrally formed on the entire surface of at least the front surface side of the plate member are formed in a substantially concave shape and placed in front of the backrest of the chair. It is characterized by being used.

  According to the present invention, in the above configuration, the side support portions are formed in a substantially symmetrical shape with respect to the top and bottom of the support plate member, and the side support portions are formed so that the vertical width thereof is smaller than the vertical width of the back support portion. And it can be set as the structure formed by deviating to one side regarding the upper and lower sides of a back support part. Further, the support plate member may be formed with a substantially arc-shaped bent portion or a substantially right angle when the boundary between the back support portion and the side support portion is viewed from the plane. Furthermore, the cushioning member is preferably formed of a foamed synthetic resin material or a thermoplastic elastomer material. Furthermore, the support plate member provided with the cushioning member may be configured such that the outside is covered with a flexible sheet material such as a synthetic resin, a cloth, or a leather.

  Since the backrest of the present invention is used by being placed in front of the back of the chair or wheelchair, not attached to the chair or wheelchair, it is easy to use and can stably support the lumbar part without falling. Even a seated person with a circular back can support the back without a sense of incongruity, and moreover, it can be supported stably by holding both sides, so that the effect of extremely good usability can be obtained.

  In addition, the backrest of the present invention is seated when the vertical width of both side support portions is formed smaller than the vertical width of the back support portion and is deviated to one side with respect to the upper and lower sides of the back support portion. According to the length of both sides of the person, it can be used with the upper and lower sides reversed, so that an effect of good usability can be obtained.

  Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a front view of an example of the backrest of the present invention, FIG. 2 is a rear view of the backrest of FIG. 1, FIG. 3 is a plan view of the backrest of FIG. 1, and FIG. 4 is a right side view of the backrest of FIG. FIG. 5 is a rear view of another example of the backrest of the present invention, and FIG. 6 is a front view showing a use state of the backrest of FIG.

  In the figure, 1 is a backrest having a substantially concave shape that is used by being placed in front of the backrest of a chair or wheelchair, 2 is a support plate member that is the core of the backrest 1, and 2a is a support plate member The back support portions 2b and 2c that support the back of the seated person in 2 are left and right side support parts that sandwich both sides of the seated person. 3 is a large hole formed substantially in the center of the back support portion 2a. Since the curved spine portion of the seated person escapes into the hole 3, a person with a round back does not hurt the spine. Here, the support plate member 2 is formed by processing a plate material made of synthetic resin, but may be formed of a wooden plywood or a metal plate.

  4 is a cushioning member provided on the entire front surface side including the hole 3 of the support plate member 2, and is formed so that the outer shape is slightly larger than the outline of the support plate member 2. Although the cushioning member 4 uses a thermoplastic foamed polyurethane resin material here, other foamed synthetic resin materials may be used, or a thermoplastic elastomer may be used. Examples of the cushioning member other than the above include batting, air, gel material, and spring. This cushioning member 4 may be provided also on the rear surface side of the support plate member 2, or the support plate member 2 may be placed in a cushion-shaped member formed in a bag shape. Although not shown, the entire support plate member 2 provided with the cushioning member 4 may be covered with a flexible sheet material such as synthetic resin, cloth, or leather.

  Next, the left and right side support portions 2b and 2c sandwiching both sides of the seated person are, as shown in FIGS. 3 and 4, reverse U when viewed from the plane from the left and right of the back support portion 2a. It is bent and formed integrally so as to form a letter shape or a concave shape. Here, as shown in FIGS. 1 and 2, the vertical widths of the side support portions 2b and 2c are formed to be smaller than the vertical width of the back support portion 2a, and in the example shown in the figure, they are biased downwardly from the back support portion 2a. Are formed. This is because the height of the side may differ depending on the seated person, so in the case of a large person with a high side, the backrest 1 is moved up and down from the state shown in FIGS. It is possible to cope by using it reversely. Note that the outer edge shapes of the left and right side support portions 2b and 2c are substantially symmetrical with respect to the top and bottom of the back support portion 2a, but their positions are deviated. In addition, the boundary between the back support member 2a and the left and right side support portions 2b and 2c is formed in a substantially arc-shaped bent portion here, but may be formed at a boundary by a corner portion such as a right angle.

  FIG. 5 shows the back side of another example of the backrest of the present invention. The backrest 1 of this other example is formed by forming a substantially U-shaped notch in the back support portion 2a of the back support plate 2 instead of the circular hole 3 in the backrest 1 shown in FIG. The cushioning member 4 may be provided on the front side of the back support plate 2 so as to cover the entire area of the substantially U-shaped notch 3 along the upper side line (1) 4a. You may provide in the front side along the edge of the substantially U-shaped notch 3 along.

  Next, the case where the backrest 1 of the present invention is used in a wheelchair will be described with reference to FIG. 6. The seat resting on the front of the backrest 7 between the left and right armrests 5 a and 5 b of the wheelchair 5. When the person sits on the board 6 and sits down on the seat board 6, the left and right side support portions are fitted so that both sides are held from the outside. A wheelchair user who cannot hold the spine) vertically is seated on the wheelchair 5 in an appropriate posture even without an assistant, and the maintenance of the posture is complemented. Further, even if the seated person as described above is in the “round back” posture, the round back portion (the cushioning member 4 is on the front surface) escapes to the round hole 3, so Rest 1 does not hurt the spine.

  The backrest according to the present invention is not attached to a chair or a wheelchair but is placed in front of the backrest so that it is easy to handle and can be used as it is for most chairs and wheelchairs currently used. Furthermore, since the structure is simple, there are no problems such as failure, and there is an advantage that the manufacturing cost is not so high.

The front view of an example of this invention backrest. The rear view of the backrest of FIG. The top view of the backrest of FIG. The right view of the backrest of FIG. The rear view of another example of this invention backrest. The front view which shows the use condition of the backrest of FIG.

Explanation of symbols

1 Backrest 2 Support plate member
2a Back support
2b, 2c Left and right side support 3 Large hole 4 Cushioning member 5 Wheelchair 6 Seat plate 7 Backrest

Claims (6)

  A back support part for supporting the back of the seated person, a side support part integrally formed from the left and right sides of the back support part, and a support plate member provided with a substantially U-shaped or hole-like recess formed in the back support part; A backrest for a chair, characterized in that it is formed in a substantially concave shape from a cushioning member integrally formed on at least the entire front surface side of the plate member and is used by being placed in front of the backrest of the chair.   The chair backrest according to claim 1, wherein the side support portions are formed substantially symmetrically with respect to the upper and lower sides of the support plate member.   The chair backrest according to claim 1 or 2, wherein the side support portion is formed so that its vertical width is smaller than the vertical width of the back support portion and is shifted to one side with respect to the upper and lower sides of the back support portion.   The backrest for a chair according to any one of claims 1 to 3, wherein the support plate member has a substantially arc-shaped bent portion or a substantially right angle when a boundary between the back support portion and the side support portion is seen from a plane.   The backrest for a chair according to any one of claims 1 to 4, wherein the cushioning member is formed of a foamed synthetic resin material or a thermoplastic elastomer material. The backrest for a chair according to any one of claims 1 to 5, wherein the support plate member provided with the cushioning member is covered with a flexible sheet material made of synthetic resin, cloth, or leather.

Images