A chair that reduces the load on your hips and lower back

Abstract

The present invention relates to a chair for reducing the load on the buttocks and waist. The chair (100) is characterized in that it includes a seat (110) and a backrest (130) for a user to sit on, and further includes a spacer (120) protruding upward from the rear end of the seat (110), and the lower end of the backrest (130) is mounted on the upper end of the spacer (120) so that it can be tilted backward. Moreover, the angle adjustment point of the backrest (130) relative to the spacer (120) is consistent with the inward bending point (P) of the lumbar spine of the body of the user sitting on the seat (110), thereby having the advantage of significantly reducing the load acting on the buttocks and waist.

Description

Technical Field

[0001] The present invention relates to an angle-adjustable backrest chair, and more particularly to a chair having the following characteristics for reducing the load on the buttocks and waist: the angle-adjustable backrest of the chair is tilted not from the seat (corresponding to the user's coccyx) but from the user's lumbar spine, that is, from a point as high as the seat setting height, thereby minimizing the load acting on the buttocks and waist when sitting. Background Art

[0002] Generally speaking, a chair is an appliance for people to sit on and includes a seat for supporting the buttocks when sitting down and a backrest arranged behind the seat to support the user's waist. Depending on the situation, legs or a neck support are additionally arranged under the seat. The legs are either fixed or have casters at the lower ends for easy movement. The neck support is constructed in various ways according to the purpose of use, for example, it can be constructed to support the user's head.

[0003] Among such chairs, various lumbar support type chairs are disclosed that support the lumbar region of a user when the user sits on the chair.

[0004] For example, there is a chair in which a certain depth is formed on both sides of the center of the backrest so that the waist is stabilized when the user leans back.

[0005] This lumbar support chair only supports the lumbar area of ​​the seated user, so comfort or convenience is limited, and there is also a technical limitation in that the load acting on the lumbar area cannot be completely eliminated.

[0006] In addition, for example, there is known a chair with a backrest that can adjust the tilt angle, such as a car seat, and the backrest of this angle-adjustable chair can adjust the tilt angle by reclining the backrest.

[0007] The existing angle-adjustable backrest chair has a backrest that bends at the seat (the part where the buttocks sit) for angle adjustment, which cannot accurately support the user's (sitter's) waist. This causes a technical problem in which the load acting on the waist is transferred to the waist intact.

[0008] That is, in existing chairs with angle-adjustable backrests, the angle of the backrest is adjusted in the coccyx area of ​​the seated person, so that when using the chair, the load of the upper body puts pressure on the spine and buttocks for a long time, resulting in long-term physical pain.

[0009] In addition, in the case of existing chairs with adjustable backrest angles (for example, when used as office (student) chairs rather than fixed chairs such as car seats), when the backrest is tilted backward from 90° to 180°, the center of gravity of the upper body and the backrest is unbalanced, which may cause the person to fall backward. Moreover, since the backrest must be tilted backward, when the backrest is unfolded, the space occupied by the backrest increases.

[0010] On the other hand, due to the diversification of modern people's lives and work, the frequency of using airplanes, long-distance buses (highway buses, intercity buses), and high-speed trains as transportation is increasing.

[0011] The backrest tilt angles of the chairs installed on these airplanes, long-distance buses (highway buses, intercity buses) and high-speed trains are limited, so when sitting for a long time, the waist bears a great load, resulting in a bad sitting feeling and discomfort.

[0012] In addition, when traveling long distances on chairs in airplanes, buses, cars, high-speed trains, etc., the load on the upper body is transferred to the buttocks. Due to this load transfer, the occupant bears pressure on the buttocks, causing the occupant to suffer pain.

[0013] Existing patent document 1: Korean Patent Publication No. 10-1690054 (publication date: December 27, 2016).

[0014] Existing Patent Document 2: Korean Utility Model Publication No. 20-0431249 (publication date: November 23, 2006). Summary of the Invention

[0015] Technical issues

[0016] The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a chair having the following features that reduces the load on the buttocks and waist.

[0017] First, the point at which the backrest angle is adjusted by the spacer coincides with the point at which the user's lumbar spine only bends inward (toward the body), thereby supporting the user's back and waist at the same time, reducing or completely eliminating the load on the buttocks and waist when sitting.

[0018] Secondly, the backrest is constructed so that it does not tilt from the seat, but the angle of the backrest is adjusted from a position as high as the seat setting height, that is, accurately from the lumbar vertebrae, thereby significantly eliminating the load acting on the buttocks and waist, thereby allowing the waist to be supported while leaning on the backrest.

[0019] Third, the load of the user's upper body (upper body) is distributed on the backrest composed of multiple joints by utilizing the characteristics of the lumbar joint that bends backward, thereby relieving the pain of the waist and buttocks that have been under long-term pressure and providing a comfortable sleeping effect.

[0020] Fourth, when the backrest tilts backward, the upper body (upper body) part above the lumbar spine leans back, so it can maintain balance and remain stable.

[0021] Fifth, when the backrest is tilted backward, the upper body (upper body) above the lumbar spine will tilt backward, so even if the backrest is tilted at a very small angle (Φ), it produces the same effect as tilting the backrest of an existing chair at a large angle, thereby making the occupied space less dispersed.

[0022] Sixth, when the present invention is applied to airplane or car seats, the airplane or car needs to configure the seats in a limited space, thereby further improving space utilization and reducing the physical pain caused by pressure on the back or buttocks, thereby providing more comfortable rest and long sleep.

[0023] Technical Solution

[0024] The chair for reducing the load on the buttocks and waist of the present invention for achieving the above-mentioned purpose is characterized in that, in the chair including a seat and a backrest, it also includes a spacer protruding upward from the seat, and the lower end of the backrest is installed on the upper end of the spacer so that it can tilt backward, and relative to the spacer, the backrest angle adjustment point is consistent with the inward bending point of the lumbar spine of the seated person's body.

[0025] Effects of the Invention

[0026] The chair of the present invention having the above-mentioned structure and reducing the load on the hips and waist has the following effects:

[0027] First, the backrest angle spacer adjustment point is formed to coincide with the point where the user's lumbar spine bends only inward (toward the body), thereby simultaneously supporting the user's back and waist, so that the load acting on the buttocks and waist when sitting can be reduced or completely eliminated.

[0028] Second, a chair with an adjustable tilt angle is constructed so that the backrest does not tilt from the seat, but the angle of the backrest is adjusted from a position higher than the set height of the seat, that is, it is adjusted accurately at the lumbar spine, thereby effectively eliminating the load acting on the buttocks and waist, thereby allowing the waist to be supported while leaning on the backrest.

[0029] Third, when implemented as a chair in a car or train, no load is applied to the waist when sitting for a long time while moving for a long time, so it is more effective for moving in a state of sitting for a long time.

[0030] Fourth, by utilizing the characteristics of the lumbar joint that bends backward, the load of the user's upper body (upper body) is dispersed on the backrest composed of multiple joints, thereby relieving the pain of the waist and buttocks that have been under long-term pressure and providing a comfortable sleeping effect.

[0031] Fifth, for existing office (student) chairs with adjustable backrest angles, when the backrest is tilted backward from 90° to 180°, the center of gravity of the upper body and the backrest is unbalanced, causing the problem of falling backward. However, when the chair according to the present invention that reduces the load on the buttocks and waist is used as an office (student) chair, even if the backrest is tilted backward, only the upper body (upper body) above the lumbar spine tilts, so it can maintain balance and stability.

[0032] Sixth, when the backrest is tilted backward, the upper body (upper body) above the lumbar spine tilts backward, so even if the backrest is tilted at a very small angle (Φ), it produces the same effect as tilting the backrest of an existing chair at a large angle, thereby making the occupied space dispersed less, thereby increasing space utilization.

[0033] Seventh, when the present invention is applied to airplane or car seats, the airplane or car needs to configure the seats in a limited space, thereby further improving space utilization and reducing the physical pain caused by pressure on the back or buttocks, thereby providing more comfortable rest and long sleep. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 1 is an operational diagram illustrating a configuration of a chair 100 for reducing the load on the hips and waist and a tilting operation of a backrest 130 as viewed from one side according to an embodiment of the present invention;

[0035] Figure 2 1 is a conceptual diagram of the main parts of a chair 100 for reducing the load on the hips and waist, as viewed from the front, according to an embodiment of the present invention;

[0036] Figure 3 This is an exemplary diagram of a user using the chair 100 for reducing the load on the hips and waist according to an embodiment of the present invention;

[0037] Figure 4 This is a conceptual diagram of the main parts of a chair 100 for reducing the load on the hips and waist according to a modified example of the present invention, as seen from the front;

[0038] Figure 5 yes Figure 4 A conceptual diagram showing a side view of a chair 100 for reducing the load on the hips and waist according to a modified example of the present invention. DETAILED DESCRIPTION

[0039] A preferred embodiment of the chair for alleviating the load on the hips and waist of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] The chair 100 for reducing the load on the buttocks and waist of the present invention for achieving the above-mentioned purpose is characterized in that the chair 100 includes a seat 110 and a backrest 130 for the user to sit on, and further includes a spacer 120 protruding upward from the rear end of the seat 110, and the lower end of the backrest 130 is installed on the upper end of the spacer 120 so that it can tilt backward (tilting), that is, fall backward, and the angle adjustment point of the backrest 130 relative to the spacer 120, that is, the rotation axis 131 serving as the rotation axis is formed to be consistent with the inward bending point (P) of the lumbar spine of the body of the user sitting on the seat (110).

[0041] Accordingly, for the spacer 120, the angle adjustment point of the backrest 130, that is, the rotation axis 131 is consistent with the inward (toward the body) bending point (P1) of the user's lumbar spine, thereby supporting the user's back and waist at the same time, so that the load acting on the buttocks and waist can be reduced or completely eliminated when sitting.

[0042] In particular, the angle of the backrest 130 is not adjusted in the seat 110 (the coccyx of the seated person), but the angle is adjusted accurately at the lumbar point from a position as high as a set height (h1) higher than the seat 110, that is, from the upper end of the spacer 120, thereby significantly eliminating the load acting on the buttocks and back, thereby allowing the seated person to lean on the backrest while supporting the waist.

[0043] In addition, when the chair 100 according to the present invention is implemented as a chair in a car or train, there is no load on the waist when sitting for a long time due to long-term movement, so it is more effective to move in a state of sitting for a long time.

[0044] On the other hand, the chair 100 for reducing hip and waist load according to an embodiment of the present invention may further include a neck support (N1) installed at the upper end of the backrest 130, so that the above-mentioned effect will be more pronounced with the neck support (N1).

[0045] The angle at which the backrest 130 is tilted (tilt angle) is represented by an angle (Φ).

[0046] As shown in the figures, in a chair 100 for reducing the load on the hips and waist according to an embodiment of the present invention, the spacer 120 is configured in the shape of two or more poles.

[0047] On the other hand, in the chair 100 for reducing the load on the hips and waist according to an embodiment of the present invention, the spacer 120 is described as being formed in the shape of two rods, but is not limited thereto. For example, even if it is formed in the shape of a plate, it certainly falls within the technical scope of the present invention.

[0048] In addition, according to the embodiment, the lower side may be formed in a plate shape, and the upper end may be formed in a rod shape (see Figure 4 ).

[0049] Therefore, the spacer 120 is within the technical scope of the present invention regardless of its shape as long as it is used to adjust the angle of the backrest from the upper side to the same height as the height ( h1 ) set in the seat 110 .

[0050] The spacer 120 may be formed integrally with the seat 110 or may be upright mounted on the seat 110 by a fastening member as a separate component.

[0051] The spacer 120 is characterized in that it is formed to have a height ( h1 ) of 15 to 25 cm from the seat 110 .

[0052] In addition, the backrest 130 is characterized in that it is formed in a flat shape or a curved shape.

[0053] Hereinafter, a configuration in which the backrest 130 is supported and rotated by the spacer 120 in the chair 100 for reducing the load on the hip and back according to an embodiment of the present invention will be described in detail.

[0054] The chair 100 for reducing the load on the hip and waist according to an embodiment of the present invention is characterized in that it further includes a rotation shaft 131 formed at the lower end of the backrest 130 , and the spacer 120 is rotatably mounted on the rotation shaft 131 .

[0055] In addition, the spacer 120 is formed with a shaft hole 121 , and the rotating shaft 131 is rotatably installed in the shaft hole 121 , so that the backrest 130 can rotate relative to the spacer 120 .

[0056] In addition, a bearing 141 may be installed in the shaft hole 121 for smooth rotation.

[0057] The chair 100 for reducing the load on the hips and waist according to an embodiment of the present invention is characterized by further comprising a tilting member for adjusting the tilt angle (inclination) of the backrest 130 relative to the spacer 120 .

[0058] The tilting member itself can be implemented as various tilting members known before applying for the present invention.

[0059] For example, the tilting member may include a driven gear 151 axially mounted on the rotating shaft 131 , a driven gear 152 meshing with the driven gear 151 , and driving sources 161 and 162 mounted on the prime mover gear 152 to rotate the prime mover gear 152 .

[0060] In addition, for example, the driving source 161 may be configured as a motor box 163 (see FIG. 164 ) mounted on the driving gear 152 and electrically rotating the driving gear 152. Figure 4 ), or, for example, the driving source 161 may be configured as a lever 161 mounted on the driving gear 152 and manually forcibly rotating the gear 152 (see Figure 2 ), of course, in any case these belong to the technical scope of the present invention.

[0061] The chair 100 for reducing the load on the hips and waist according to an embodiment of the present invention is characterized by employing a technique for adjusting the height of the spacer 120 according to the seat height of the seated person (user).

[0062] That is, the chair 100 for reducing the load on the hips and waist according to an embodiment of the present invention is characterized by further comprising a height adjustment member for adjusting the height ( h1 ) of the spacer 120 from the seat 110 .

[0063] For example, the height adjustment member is characterized in that it includes: a height adjustment hole 121, which is formed in multiple levels (three levels in the illustrated embodiment) along the height direction in the spacer 120; a fastening hole 111, which is formed in the seat 110 to correspond to the height adjustment hole 121; and a fastening bolt 171, which screws the height adjustment hole 121 and the fastening hole 111.

[0064] On the other hand, in the chair 100 for reducing the load on the hips and waist according to an embodiment of the present invention, the height adjustment component is described as consisting of a height adjustment hole 121, a fastening hole 111, and a fastening bolt 171, but is not limited to this. If it is a technology for adjusting the height of the spacer 120, it falls within the technical scope of the present invention in any case.

[0065] Next, the operation of the chair 100 for reducing the load on the hips and waist according to one embodiment of the present invention having the above-described configuration will be described.

[0066] like Figure 3 As shown, the backrest 130 is located on the rotating shaft 131 which is roughly the bending point of the user's waist. When the user lies down with his back located on the backrest 130, the user feels very comfortable, just like lying on a bed.

[0067] As described above, preferred embodiments of the present invention have been described. It is obvious to those skilled in the art that the present invention may be implemented in other specific forms in addition to the above embodiments without changing the technical purpose or basic features. Therefore, it should be understood that the embodiments described are illustrative rather than restrictive.

[0068] The scope of the present invention is indicated by the appended claims rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present invention.

Claims

1. A chair that reduces the load on the buttocks and waist, characterized in that: In a chair (100) comprising a seat (110) and a backrest (130), a spacer (120) protruding upward from the seat (110) is further included, and the lower end of the backrest (130) is mounted on the upper end of the spacer (120) so that it can be tilted backward, and relative to the spacer (120), the angle adjustment point of the backrest (130) is consistent with the inward bending point (P) of the lumbar spine of the seated person's body, Also included is a tilting member for adjusting the tilting angle of the backrest (130) relative to the spacer (120), The utility model further comprises a rotating shaft (131) formed at the lower end of the backrest (130), and the spacer (120) is rotatably mounted on the rotating shaft (131). The spacer (120) is formed with a shaft hole (121), and the rotating shaft (131) is rotatably installed in the shaft hole (121), so that the backrest (130) can rotate relative to the spacer (120). The spacer (120) is formed integrally with the seat (110) or is upright mounted on the seat (110) via a fastening member.

2. The chair for reducing the load on the hips and waist according to claim 1, characterized in that: Also included is a height adjustment member for adjusting the height (h1) of the spacer (120) from the seat (110).

3. The chair for reducing the load on the hips and waist according to claim 2, characterized in that: The height adjustment member includes: a height adjustment hole (121) formed in a spacer (120) in multiple stages along a height direction; a fastening hole (111) formed in the seat (110) to correspond to the height adjustment hole (121); and a fastening bolt (171) that screws the height adjustment hole (121) and the fastening hole (111).

4. The chair for reducing the load on the hips and waist according to claim 1, characterized in that: The spacer (120) is configured in the shape of two or more rods.

Images