WO2018157420A1

WO2018157420A1 - Chair having lumbar support adjusting function

Info

Publication number: WO2018157420A1
Application number: PCT/CN2017/077127
Authority: WO
Inventors: 王江林; 刘冠华; 葛国明; 夏中方
Original assignee: 浙江恒林椅业股份有限公司
Priority date: 2017-02-28
Filing date: 2017-03-17
Publication date: 2018-09-07
Also published as: CN106859105A

Abstract

A chair having a lumbar support adjusting function, comprising a backrest (1), a seat (4), and a support leg. The backrest (1) is provided with a cavity (8); a support component (2) is mounted on the upper part in the cavity (8) by means of a lifting and folding device (3); the lifting and folding device (3) comprises a fixing plate (30) and connecting arms (35); the fixing plate (30) is hingedly connected with the connecting arms (35), and fixes and synchronously moves the at least two connecting arms (35) by means of rigid connecting blocks (36). According to the present invention, the backrest (1) is provided with the cavity (8), and the support component (2) is mounted in the cavity (8) and is hingedly connected with the backrest (1) by means of the lifting and folding device (3), so that lumbar support adjustment of the backrest (1) is achieved; moreover, the plurality of connecting arms (35) of the lifting and folding device (3) are fixed and synchronously moved, so that the shaking risk of the support during use is reduced.

Description

Description: A chair with a lumbar adjustment function

[0001] The present invention relates to the field of furniture, and more particularly to a chair having a lumbar adjustment function.

Background technique

[0002] Sub-health has always been a concern for people's lives. Among them, the lumbar spine problem caused by sedentary is especially frequent. As we all know, the human spine is S-shaped, and now the seat back of the seat is generally up and down. Or the lower part of the back of the chair has a slight arching to improve the comfort of the back support of the seat, but the chairs of these structures can not support the s-shaped spine of the human body, and the chair of these structures generally supports the back angle. It can't be adjusted, it can't satisfy the individual difference, so it can't solve the spine problem caused by sedentary to the user.

[0003] At present, although there is a chair with a lumbar support in the prior art, the position of the lumbar support is generally located in the middle and lower part of the chair, and the length of the lumbar support is short, the adjustment range is limited, and the waist width is too wide, and cannot It forms a good support for the spine located in the middle of the human body, affecting the supporting effect.

technical problem

[0004] In order to solve the above technical problems, an object of the present invention is to provide a chair having a lumbar adjustment function, the lumbar support of the chair has a larger adjustment stroke range, and the support for the waist is more prominent, effectively reducing Upper limb compression of the lumbar spine.

Problem solution

Technical solution

[0005] In order to achieve the above object of the invention, the present invention adopts the following technical solutions:

[0006] A chair having a lumbar adjustment function includes a seat back, a seat and a foot, the seat back is provided with a cavity, and an upper portion of the cavity is mounted with a support by a folding device, The folding device comprises a fixing plate and a connecting arm, the fixing plate and the connecting arm are hinged, and the at least two connecting arms are fixedly synchronized by the rigid connecting block.

[0007] As a preferred solution: the fixing plate is fixed to the seat back, the rigid connecting block is fixed to the supporting member, and both ends of the middle portion of the fixing plate are folded to the same side to form a fixing arm, and one of the fixing arms There is also a cover on the side. The connecting arm is hinged in a cavity formed by the fixed arm and the cover.

[0008] As a preferred solution: a pawl block is also hinged on the fixed arm, a ratchet block is fixed on the connecting arm, and a resetting groove is disposed between the pawl block and the ratchet block, and the cover plate is A retaining edge is disposed on both sides of the one end, and a positioning block is disposed between the two retaining edges, and the outer block is further provided with a spring piece, and the middle portion of the spring piece is located outside the positioning block, the spring piece The two ends are respectively located on the inner side of the other positioning block and the inner side of the blocking edge, and the spring piece located inside the other positioning block is bent upward to abut the pawl block.

[0009] As a preferred solution: the height of the cavity is more than 70% of the overall height of the seat back. Due to the high height of the cavity, the length of the support member is large, and the upper portion of the support member is hinged to the back of the seat, so that the adjustment of the support member in the vertical or horizontal direction is wider. On the other hand, since the length of the support body is long, even if the support body is turned over to provide the lumbar support, the back of the human body can be more closely fitted with the support body, and is more comfortable.

[0010] As a preferred solution: a headrest is disposed on the upper front surface of the seat back, and the cavity is disposed under the headrest, and the height of the cavity is more than 60% of the overall height of the seat back.

[0011] As a preferred solution: the width of the cavity is 30%-80<3⁄4 of the overall width of the seat back. The width of the cavity determines the width of the support body. The support body is narrower and the support effect of the human body's spine is more obvious. The support body is wider and the support body has less stress on the human spine, and the effect is not good.

[0012] As a preferred solution: the support member includes an upper end portion and a support body, wherein the upper end portion has a thickness of 1/4 to 1/2 of the thickness of the support body, and the first end portion passes through the first curved surface between the upper end portion and the support body. transition. The structure of the support member allows the folding device to be fixed to the outside of the support member to facilitate maintenance of the support member or the folding device.

[0013] As a preferred solution: the lower end of the support body is transitioned from front to back through the second curved surface. With the adjustment of the support member, the contact position of the lower end portion of the support member and the waist portion of the human body is constantly changing, and the curved end transition of the lower end portion of the support member ensures that the support member and the waist portion of the human body are always fitted together, and the hinge is more comfortable.

[0014] As a preferred solution: the shape of the support body matches the shape of the cavity, and the shape of the support body conforms to the overall shape of the seat back.

[0015] As a preferred solution: the folding device uses a gas rod or an airbag to drive the connecting arm to rotate.

Advantageous effects of the invention

Beneficial effect [0016] The present invention realizes the lumbar support adjustment of the seat back by providing a cavity on the seat back and installing the support in the cavity, and the hinged device is hinged to the back of the seat, and the folding device is The multiple connecting arms are fixed in synchronism, reducing the risk of the support being shaken during use.

Brief description of the drawing

DRAWINGS

[0017] FIG. 1 is a schematic cross-sectional view of a chair of the present invention.

[0018] FIG. 2 is a schematic structural view of a cavity and a folding device of the chair of the present invention.

[0019] FIG. 3 is a schematic structural view of a support body of the present invention.

[0020] FIG. 4 is a schematic view showing the connection structure of the seat back and the support body of the present invention.

[0021] FIG. 5 is a schematic structural view of another folding device of the present invention.

[0022] FIG. 6 is a schematic structural view of a cover plate of another folding device of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

[0024] In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "previous" Directions such as "," "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "shun", "reverse", etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the present invention and the simplified description, and is not intended to indicate or imply that the device or component referred to has a specific orientation, and is constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features, either explicitly or implicitly. In the description of the present invention, "multiple" means two or more unless otherwise specifically defined. In the present invention, the terms "installation", "connected", "connected", "fixed", unless otherwise explicitly stated and defined. The terms should be understood broadly. For example, they may be fixed connections, detachable connections, or integral connections; they may be mechanical or electrical connections; they may be connected directly or indirectly through an intermediate medium. It can be the internal communication of the two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

[0026] In the present invention, the first feature may be included in the "on" or "under" the second feature, and may include the first and second features, respectively, and may include the first sum, unless otherwise specifically defined and defined. The second feature is not in direct contact but through additional features between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and below the second feature, or merely indicates that the first feature level is less than the second feature

[0027] A chair having a lumbar adjustment function, as shown in FIG. 1 to FIG. 4, includes a seat back 1, a seat 4 and a foot, and the seat back 1 is provided with a cavity 8, the cavity The upper portion 8 is mounted with a support member 2 by a folding device. The front side of the seat back 1 is provided with a headrest 5, and the cavity 8 is disposed below the headrest 5, and the height of the cavity 8 is 60% or more of the overall height of the seat back 1. If the headrest is not provided on the back of the chair, the height of the cavity 8 is 70% or more of the overall height of the seat back 1.

[0028] The width of the cavity 8 is 30%-80<3⁄4 of the overall width of the seat back 1. The width of the cavity determines the width of the support body. The support body is narrower, and the support effect of the human body's spine is more obvious. The support body is wider, and the support body does not have obvious stress on the human spine, and the effect is not good.

[0029] The support member 2 includes an upper end portion 21 and a support body 22, and the upper end portion 21 has a thickness of 1/4 to 1/2 of the thickness of the support body 22, and the upper end portion 21 and the support body 22 pass through A curved surface 24 transition. The two folding devices 3 are located between the upper end portion 21 of the support member 2 and the seat back 1 , and two folding devices are spaced apart, and the two folding devices 3 are respectively adjacent to the horizontal direction of the support member. Left and right ends.

[0030] The lower end of the support body 22 transitions from front to back through the second curved surface 23. With the adjustment of the flipping of the support member, the contact position of the lower end portion of the support member with the waist of the human body is constantly changing, and the lower end portion of the support member adopts a curved surface transition to ensure that the support member and the waist portion of the human body are always fitted together, and the hinge is more comfortable.

[0031] The shape of the support body 2 matches the shape of the cavity 8, and the shape of the support body 2 coincides with the overall shape of the seat back 1. The folding device 3 adopts a structure in which a ratchet and a pawl are matched, and the upper end of the folding device 3 is open The seat back fixing member 6 is fixed to the seat back 1, and the lower end is fixed to the support main body 22 by the support fixing member 7. The folding device 3 can also use a gas rod or an air bag.

[0032] When the user flips the support into the cavity during the leisure, the support is merged with the back of the chair to become a part of the back of the chair. When the user works, the support member is turned over to resist the back of the user, and the compression of the lumbar vertebrae of the upper limb is relieved to effectively protect the lumbar vertebrae. The present invention is not limited to this implementation, for example, the chair back is divided into two or more sections, and the same advantageous effect can be achieved by arranging the structure at the waist position.

Embodiments of the invention

[0033] A chair having a lumbar adjustment function as shown in FIG. 1, FIG. 5 and FIG. 6 includes a seat back 1, a seat 4 and a foot, and the seat back 1 is provided with a cavity 8 The upper portion of the cavity 8 is mounted with a support 2 by means of a folding device 3, the folding device 3 comprising a fixing plate 30 and a connecting arm 35, the fixing plate 30 and the connecting arm 35 being hinged and passing through the rigid connecting block 36 The at least two connecting arms 35 are fixed in synchronism.

[0034] The fixing plate 30 is fixed to the seat back 1 , and the rigid connecting block 36 is fixed to the support member 2 . The two ends of the middle portion of the fixing plate 30 are folded to the same side to form a fixed arm 32 . A side of the 32 is further provided with a cover 31 which is hinged in a cavity formed by the fixed arm 32 and the cover 31.

[0035] The fixed arm 32 is also hinged with a pawl block 33, a ratchet block 34 is fixed on the connecting arm 35, and a reset groove is disposed between the pawl block 33 and the ratchet block 34. The two sides of one end of the plate 31 are provided with a retaining edge 38. The two retaining edges 38 are provided with a positioning block 37. The outer block 37 is further provided with a spring piece 39, and the central part of the spring piece 39 is located at a On the outer side of the positioning block 37, the two ends of the spring piece 39 are respectively located on the inner side of the other positioning block 37 and the inner side of the blocking edge 38, and the spring piece 39 located inside the other positioning block 37 is bent upward and the pawl block 33. Offset.

[0036] The height of the cavity 8 is 70% or more of the overall height of the seat back 1. The front upper portion of the seat back 1 is provided with a headrest 5, and the cavity 8 is disposed below the headrest 5, and the height of the cavity 8 is 60% or more of the overall height of the seat back 1. The width of the cavity 8 is 30 < 3⁄4-80% of the overall width of the seat back 1.

[0037] The support member 2 includes an upper end portion 21 and a support body 22, and the upper end portion 21 has a thickness of 1/4 to 1/2 of the thickness of the support body 22, and the upper end portion 21 and the support body 22 pass through A curved surface 24 transition. The lower end of the support body 22 transitions from front to back through the second curved surface 23. The shape of the support body 2 matches the shape of the cavity 8, and the shape of the support body 2 coincides with the overall shape of the seat back 1. The folding device 3 uses a gas rod or The airbag driving link arm 35 rotates.

[0038] When the user flips the support into the cavity during leisure, the support is merged with the back of the chair to become a part of the seat back. When the user works, the support member is turned over to resist the back of the user, and the compression of the lumbar vertebrae of the upper limb is relieved to effectively protect the lumbar vertebrae. The present invention is not limited to this implementation, for example, the chair back is divided into two or more sections, and the same advantageous effect can be achieved by arranging the structure at the waist position.

[0039] It should be noted that the above embodiments are merely representative examples of the present invention. The invention can also be modified in many ways.

Any simple modifications, equivalent changes and modifications made to the above embodiments in light of the spirit of the invention are considered to be within the scope of the invention.

[0040]

Claims

Claim

[Claim 1] A chair having a lumbar adjustment function, comprising a seat back (1), a seat (4) and a foot, characterized in that: the seat back (1) is provided with a cavity (8) The upper portion of the cavity (8) is mounted with a support member (2) through a folding device (3), the folding device (3) comprising a fixing plate (30) and a connecting arm (35), the fixing The plate (30) and the connecting arm (35) are hinged, and at least two connecting arms (35) are fixedly synchronized by a rigid connecting block (36).

[Claim 2] A chair having a lumbar adjustment function according to claim 1, wherein: the fixing plate (30) is fixed to the seat back (1), and the rigid connecting block (36) is The support member (2) is fixed, and the two ends of the middle portion of the fixing plate (30) are folded to the same side to form a fixing arm (32), and one side of the fixing arm (32) is further provided with a cover plate (31). The connecting arm (35) is hinged in a cavity formed by the fixed arm (32) and the cover plate (31).

[Claim 3] A chair having a lumbar adjustment function according to claim 2, wherein: the fixed arm (32) is also hinged with a pawl block (33), and the connecting arm (35) A ratchet block (34) is fixed thereon, a reset groove is disposed between the pawl block (33) and the ratchet block (34), and a blocked edge is provided on both sides of the cover plate (31). a positioning block (37) is disposed between the two retaining edges (38), and the outer block (37) is further provided with a spring piece (39), and the middle portion of the spring piece (39) is located at a position On the outer side of the block (37), the two ends of the spring piece ( ₃₉ ) are respectively located inside the other positioning block (37) and inside the rib (38), and the spring piece located inside the other positioning block (37) (39) Bend upward to offset the pawl block (33).

[Claim 4] A chair having a lumbar adjustment function according to claim 1, wherein the height of the cavity (8) is 70% or more of the overall height of the seat back (1).

The chair with a lumbar adjustment function according to claim 1, characterized in that: the front upper part of the seat back (1) is provided with a headrest (5), and the cavity (8) is arranged at the head Below the pillow (5), the height of the cavity (8) is more than 60% of the overall height of the seat back (1).

[Claim 6] A chair having a lumbar adjustment function according to claim 1, wherein: The width of the cavity (8) is 30 < 3⁄4-80% of the overall width of the seat back (1).

[Claim 7] A chair having a lumbar adjustment function according to claim 1, wherein: the support member (2) includes an upper end portion (21) and a support body (22), and the upper end portion The thickness of (21) is 1/4 to 1/2 of the thickness of the support body (22), and the upper end portion (21) and the support body (22) are transitioned by the first curved surface (24).

[Claim 8] A chair having a lumbar adjustment function according to claim 1, wherein: the lower end of the support body (22) transitions from front to back through the second curved surface (23).

[Claim 9] A chair having a lumbar adjustment function according to claim 1, wherein: the shape of the support body (2) matches the shape of the cavity (8), and the support body ( 2) The shape is consistent with the overall shape of the seat back (1).

[Claim 10] A chair having a lumbar adjustment function according to claim 1, wherein: the folding device (3) is rotated by a gas lever or an airbag driving link arm (35).