Backrest

Abstract

A backrest 3 provided with a thoracic vertebrae-supporting section 31, which is disposed posterior to the region that corresponds to one or more of the thoracic vertebrae, from the eighth thoracic vertebra T8 to the tenth thoracic vertebra T10, in a human back, a pair of rib-pressing sections 32 disposed at positions separated outward from the thoracic vertebrae-supporting section 31 on both sides in the body width direction and pressing on one or more of the ribs, from the eighth rib R8 to the tenth rib R10, from behind, and a pair of rib-accommodating sections 33 disposed between the thoracic vertebrae-supporting section 31 and the pair of rib-pressing sections 32, the pair of rib-accommodating sections 33 being configured so that the body pressure 33A from the pair of rib-accommodating sections 33 is lower than the body pressure 31A from the thoracic vertebrae-supporting section 31 and the body pressure 32A from the pair of rib-pressing sections 32 (33A<31A, 32A).

Description

[Technical field]

[0001] The present invention relates to a backrest, and more particularly to a backrest that allows a person leaning back against it to breathe better. [Background technology]

[0002] In general, the backrest of a chair or the like is formed with a flat surface or a curved surface that fits the body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-12130 A Summary of the Invention [Problem to be solved by the invention]

[0004] The ribs attach to the thoracic vertebrae at their rear ends through joints (costovertebral joints) and move diagonally forward and downward. When inhaling, the ribs are lifted forward and upward, with the joints with the thoracic vertebrae as the fulcrum, expanding the anterior-posterior diameter of the rib cage as well as the lateral diameter. As a result, the volume of the rib cage increases.

[0005] When the part of the rib just outside the joint with the thoracic vertebrae is pressed with the same force as the parts inside and outside it, it becomes difficult to move, which can also cause problems with breathing.

[0006] A backrest formed with a flat surface or a curved surface that conforms to the body as described above comes into contact with a wide area of ​​the back of a person leaning against it, and may press the area just outside the joint between the ribs and the thoracic vertebrae with the same force as the areas inside and outside that area, leaving room for improvement in terms of promoting breathing.

[0007] In addition, it is not possible to assist the movement of the ribs during inhalation, and there is room for improvement in terms of promoting breathing.

[0008] The present invention has been made in consideration of the above circumstances, and has an object to provide a backrest that allows a person leaning his / her back against it to breathe better. [Means for solving the problem]

[0009] In order to achieve the above object, the backrest of the present invention is a backrest for leaning a person's back, comprising: The device is characterized in that it comprises a thoracic support part arranged behind a portion of the person's back corresponding to at least one of the 8th to 10th thoracic vertebrae, a pair of rib pressing parts arranged at a distance on both sides of the thoracic support part in the body width direction and pressing at least one of the 8th to 10th ribs from behind, and a pair of rib corresponding parts arranged between the thoracic support part and the pair of rib pressing parts, wherein the pair of rib corresponding parts are configured so that body pressure from the pair of rib corresponding parts is lower than body pressure from the thoracic support part and body pressure from the pair of rib pressing parts.

[0010] In the present invention, the body pressure refers to the pressure applied to the surface of the back from a backrest when a person leans his / her back against the backrest. Effect of the Invention

[0011] According to the present invention, it is possible to provide a backrest that can promote breathing of a person leaning against it. [Brief description of the drawings]

[0012] [Figure 1] 1 is a perspective view of a chair with a backrest according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a rear view of the human rib cage. [Diagram 3] This is a cross-sectional view of the main part of the backrest. [Figure 4] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the present invention is applied to the backrest of a chair. In this specification, the directions of up / down, left / right, and front / rear are based on the direction of a person leaning back against the backrest.

[0014] The chair 1 shown in FIG. 1 is configured with a rectangular parallelepiped seat 2 and a rectangular parallelepiped backrest 3. The seat 2 is configured with a metal pipe core material (not shown) formed into a predetermined shape, a resilient urethane inner material 4 arranged around the pipe core material, and a cover (not shown) that covers the inner material 4. The backrest 3 is configured with a metal pipe core material (not shown) formed into a predetermined shape, a resilient urethane inner material 5 arranged around the pipe core material, and a cover (not shown) that covers the inner material 5. FIGS. 1, 3, and 4 show the inner material 4 (seat body) of the seat 2 and the inner material 5 (backrest body) of the backrest 3 with the cover made transparent.

[0015] The backrest 3 is connected to the rear of the seat 2 by a ratchet fitting (not shown) so that the angle can be freely adjusted. The chair 1 has a reclining function with six stages, for example, and can hold the backrest 3 in a backward tilted position where the angle θ between the backrest 3 and the seat 2 is, for example, 100°, 110°, 120°, 130°, 140°, or 150°, so that the backrest does not fall further backward. Figure 4 shows the state of use where the backrest 3 is held in a backward tilted position where the angle θ between the backrest 3 and the seat 2 is 110°.

[0016] As shown in Figures 3 and 4, the chair 1 is configured so that a person 50 can sit with his / her buttocks 51 and thighs 52 placed on the flat seating surface (upper surface) 2a of the seat 2 and his / her torso 53 leaned against the flat backrest surface (front surface) 3a of the backrest 3.

[0017] As shown in FIGS. 2 to 4, the backrest 3 is configured so that the entire back 55 including the area corresponding to the thorax 54 of a person 50 can be leaned against it.

[0018] The backrest 3 has a backrest portion 30 that supports a portion of the back 55 of a person 50 that corresponds to at least a portion below the eighth thoracic vertebra level of the thorax 54. The front surface of the backrest portion 30 is also formed into a flat backrest surface 3a, similar to the front surfaces other than the backrest portion 30.

[0019] As shown in FIGS. 1 to 4, the backrest portion 30 is provided with a thoracic vertebrae support portion 31, a pair of rib pressing portions 32, and a pair of rib corresponding portions 33.

[0020] The thoracic support portion 31 is disposed behind a region of the back 55 of the person 50 that corresponds to the eighth thoracic vertebra T8 to the tenth thoracic vertebra T10.

[0021] In addition, since the 8th rib R8 to the 10th rib R10 are connected via intervertebral discs and intervertebral joints, in order to obtain the effects described below, the thoracic support part 31 only needs to be positioned posterior to a portion corresponding to at least one of the 8th thoracic vertebra T8 to the 10th thoracic vertebra T10 (one thoracic vertebra of the 8th thoracic vertebra T8, one thoracic vertebra of the 9th thoracic vertebra T9, one thoracic vertebra of the 10th thoracic vertebra T10, two thoracic vertebrae of the 8th thoracic vertebra T8 and the 9th thoracic vertebra T9, two thoracic vertebrae of the 8th thoracic vertebra T8 and the 10th thoracic vertebra T10, two thoracic vertebrae of the 9th thoracic vertebra T9 and the 10th thoracic vertebra T10, or three thoracic vertebrae of the 8th thoracic vertebra T8, the 9th thoracic vertebra T9, and the 10th thoracic vertebra T10).

[0022] The pair of rib pressing parts 32 are disposed at positions spaced apart on both outer sides in the body width direction (left and right direction) of the thoracic vertebrae support part 31, and are configured to press the eighth rib R8 to the tenth rib R10 from behind.

[0023] Since the front ends of the 8th rib R8 to the 10th rib R10 are connected to the sternum via costal cartilages, the pair of rib pressing units 32 need only be configured to press at least one or more ribs from the 8th rib R8 to the 10th rib R10 (one rib of the 8th rib R8, one rib of the 9th rib R9, one rib of the 10th rib R10, two ribs of the 8th rib R8 and the 9th rib R9, two ribs of the 8th rib R8 and the 10th rib R10, two ribs of the 9th rib R9 and the 10th rib R10, or three ribs of the 8th rib R8, the 9th rib R9 and the 10th rib R10) in order to obtain the effects described below.

[0024] The pair of rib pressing parts 32 are positioned at a distance on both sides of the thoracic support part 31 in the body width direction (left and right direction), behind a region on the back 55 of the person 50 that corresponds to at least one or more ribs from the eighth rib R8 to the tenth rib R10 below a pair of shoulder blades 56, and are configured to press at least one or more ribs from the eighth rib R8 to the tenth rib R10 from behind below the pair of shoulder blades 56.

[0025] The pair of rib corresponding parts 33 are disposed between the thoracic vertebrae support part 31 and the pair of rib pressing parts 32. Specifically, the pair of rib corresponding parts 33 are disposed in a body width region between the thoracic vertebrae support part 31 and the pair of rib pressing parts 32 so as to be located behind a part of the back 55 of the person 50 corresponding to a part immediately outside a joint (costopervical joint) 57 between the eighth thoracic vertebra T8 and the tenth thoracic vertebra T10, between the eighth rib R8 and the tenth rib R10.

[0026] In addition, since only a portion of the portion immediately outside the joint (costo-vertebral joint) 57 between the 8th rib R8 to the 10th rib R10 and the 8th thoracic vertebra T8 to the 10th thoracic vertebra T10 is not pressed with the same force as the portion inside and outside that portion, the deterioration of rib movement can be reduced compared to a case where the entire portion immediately outside the joint (costo-vertebral joint) 57 between the 8th rib R8 to the 10th rib R10 and the 8th thoracic vertebra T8 to the 10th thoracic vertebra T10 is pressed with the same force as the portion inside and outside that portion. Therefore, in order to obtain the effect described below, the pair of rib corresponding portions 33 only need to be arranged in the body width region between the thoracic vertebra support portion 31 and the pair of rib pressing portions 32 so as to be located behind a portion of the back 55 of the person 50 that corresponds to the portion immediately outside at least one of the joints (costo-vertebral joint) 57 between the 8th rib R8 to the 10th rib R10 and the 8th thoracic vertebra T8 to the 10th thoracic vertebra T10.

[0027] The pair of rib corresponding portions 33 are configured so that the body pressure 33A from the pair of rib corresponding portions 33 is lower than the body pressure 31A from the thoracic vertebrae support portion 31 and the body pressure 32A from the pair of rib pressing portions 32 (33A<31A, 32A).

[0028] The pair of rib corresponding portions 33 are recessed rearward relative to the thoracic vertebrae support portion 31 and the pair of rib pressing portions 32, so that the body pressure 33A from the pair of rib corresponding portions 33 is lower than the body pressure 31A from the thoracic vertebrae support portion 31 and the body pressure 32A from the pair of rib pressing portions 32 (33A<31A, 32A).

[0029] The pair of rib corresponding portions 33 are recessed rearward from the area in the backrest surface 3a corresponding to the sixth rib R6 to the seventh rib R7 and the area in the backrest surface 3a corresponding to the eleventh rib R11 to the twelfth rib R12.

[0030] The pair of rib pressing parts 32 are configured to be protruding forward from the thoracic vertebrae support part 31 so that the body pressure 32A from the pair of rib pressing parts 32 is higher than the body pressure 31A from the thoracic vertebrae support part 31 (31A<32A). However, they may be configured to be recessed rearward from the thoracic vertebrae support part 31 so that the body pressure 32A from the pair of rib pressing parts 32 is lower than the body pressure 31A from the thoracic vertebrae support part 31 (31A>32A). Also, they may be configured not to be protruding forward or recessed rearward from the thoracic vertebrae support part 31 so that the body pressure 32A from the pair of rib pressing parts 32 is equal to the body pressure 31A from the thoracic vertebrae support part 31 (31A=32A).

[0031] The pair of rib pressing portions 32 are protruding forward from the areas within the backrest surface 3a corresponding to the portions from the sixth rib R6 to the seventh rib R7 and the areas within the backrest surface 3a corresponding to the portions from the eleventh rib R11 to the twelfth rib R12 so as to properly press at least one of the ribs from the eighth rib R8 to the tenth rib R10 from behind.

[0032] The thoracic support portion 31 is provided so as to protrude forward from the portion within the backrest surface 3a corresponding to the portion from the sixth lumbar vertebra T6 to the seventh lumbar vertebra T7 and the portion within the backrest surface 3a corresponding to the portion from the eleventh lumbar vertebra T11 to the twelfth lumbar vertebra T12 so that the thoracic support portion 31 can properly support at least one of the corresponding thoracic vertebrae from the eighth thoracic vertebra T8 to the tenth thoracic vertebra T10 from behind, but may be provided flush with each of these portions within the backrest surface 3a.

[0033] As described above, the backrest 3 in this embodiment is a backrest 3 against which the back 55 of a person 50 is leaned, and comprises a thoracic support part 31 arranged behind a portion of the back 55 of the person 50 corresponding to at least one of the thoracic vertebrae from the 8th thoracic vertebra T8 to the 10th thoracic vertebra T10, a pair of rib pressing parts 32 arranged at a distance on both sides of the thoracic support part 31 in the body width direction and pressing at least one of the ribs from the 8th rib R8 to the 10th rib R10 from behind, and a pair of rib corresponding parts 33 arranged between the thoracic support part 31 and the pair of rib pressing parts 32, and the pair of rib corresponding parts 33 are configured so that body pressure 33A from the pair of rib corresponding parts 33 is lower than body pressure 31A from the thoracic support part 31 and body pressure 32A from the pair of rib pressing parts 32 (33A<31A, 32A).

[0034] According to the structure of the backrest 3, when the eighth rib R8 to the tenth rib R10 (the anterior ends of the eighth rib R8 to the tenth rib R10 are connected to the sternum via costal cartilages) are raised forward and upward with the joints 57 between the eighth thoracic vertebra T8 and the tenth thoracic vertebra T10 as fulcrums, the thoracic vertebrae support portion 31 supports at least one or more joints 57, and the pair of rib corresponding portions 33 support at least one or more of the rib joints 57 immediately outside the joints 57 between the eighth rib R8 to the tenth rib R10. The pair of rib pressing parts 32 press at least one rib from the eighth rib R8 to the tenth rib R10 from behind, with the pressure being at least lower than that of the parts inside and outside the part, or preferably not being pressed at all. This reduces the obstruction to the movement of the ribs (thorax 54) during inhalation and also assists and promotes the movement of the ribs (thorax 54) during inhalation, thereby providing a backrest 3 that allows the breathing of a person leaning his / her back 55 against it to be promoted.

[0035] In this embodiment, the body pressure relationship between the thoracic support part, the rib pressing part, and the rib corresponding part is obtained by a concave-convex relationship between the thoracic support part, the rib pressing part, and the rib corresponding part, but since the body pressure becomes higher (lower) as the hardness of each constituent material between the thoracic support part, the rib pressing part, and the rib corresponding part becomes higher (lower), it can also be obtained by using constituent materials with different hardness for each part. That is, the pair of rib corresponding parts may be a backrest configured such that the body pressure from the pair of rib corresponding parts is lower than the body pressure from the thoracic support part and the body pressure from the pair of rib pressing parts by forming the pair of rib corresponding parts from a material (e.g., elastic urethane) whose hardness is lower than that of the thoracic support part and the pair of rib pressing parts.

[0036] When the respective body pressure relationships between the thoracic support part, the rib pressing part, and the rib corresponding part of the backrest are obtained by a concave-convex relationship between the thoracic support part, the rib pressing part, and the rib corresponding part, the thoracic support part, the rib pressing part, and the rib corresponding part do not necessarily need to be elastic and may be made of non-elastic wood, plastic, or metal, and therefore the present invention is also applicable to backrests made of wood, plastic, or metal.

[0037] The present invention can be applied to backrests of various chairs, sofas, cushions, etc., with or without legs, other than the legless chair exemplified in this embodiment, and can also be applied to backrests of seats of vehicles such as trains, automobiles, ships, airplanes, etc. In this embodiment, the thoracic vertebrae support part, the rib pressing part, and the rib corresponding part are provided by being integrally molded into the backrest body of the backrest, but the backrest of the present invention, which is provided with the thoracic vertebrae support part, the rib pressing part, and the rib corresponding part, may be installed on the backrest by using a detachable attachment means, such as a belt, a surface fastener, or a hook, on the front surface of the backrest. [Explanation of symbols]

[0038] 3 Backrest 31 Thoracic support 32 Rib pressure area 33 Rib Corresponding Part

Claims

1. It is a backrest for people to lean their back against, A thoracic vertebrae support part is arranged behind a part of the person's back corresponding to at least one thoracic vertebra from the 8th thoracic vertebra to the 10th thoracic vertebra; A pair of rib pressing parts are arranged at positions spaced apart from each other on both sides of the thoracic vertebral support part in the body width direction and press at least one rib from the eighth rib to the tenth rib from the rear. A pair of rib corresponding portions disposed between the thoracic vertebrae support portion and the pair of rib pressing portions, A backrest, characterized in that the pair of rib corresponding portions are configured so that body pressure from the pair of rib corresponding portions is lower than body pressure from the thoracic vertebrae support portion and body pressure from the pair of rib pressing portions.

2. The backrest according to claim 1, a pair of rib corresponding portions are recessed rearward relative to the thoracic vertebrae support portion and the pair of rib pressing portions, so that body pressure from the pair of rib corresponding portions is lower than body pressure from the thoracic vertebrae support portion and body pressure from the pair of rib pressing portions.

3. The backrest according to claim 1, a pair of rib corresponding portions made of a material having a hardness lower than that of the thoracic support portion and that of the pair of rib pressing portions, thereby configuring the body pressure from the pair of rib corresponding portions to be lower than that from the thoracic support portion and that from the pair of rib pressing portions.

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