CN215423712U

CN215423712U - Seat with foldable backrest

Info

Publication number: CN215423712U
Application number: CN202121786363.4U
Authority: CN
Inventors: 陈杰; 任凯峰; 李建民; 宣家豪; 张小东; 李小毛; 钟自文; 胡敬天; 潘彩英; 张孝启
Original assignee: Anji Shengxin Office Furniture Co ltd
Current assignee: Anji Shengxin Office Furniture Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-01-07
Anticipated expiration: 2031-08-03

Abstract

The utility model relates to the technical field of seats, in particular to a seat with a foldable backrest, which comprises a backrest, wherein the backrest is rotatably connected to a seat frame through a rotary connecting part; the backrest is detachably connected to the seat frame through the movable pin structure; the chair seat frame is provided with an elastic device acting on the backrest, and the elastic device provides an elastic force for pushing the backrest to turn over for the backrest. The backrest-foldable seat can be detached and folded by a single person without the assistance of any tool, and is very convenient and fast.

Description

Seat with foldable backrest

Technical Field

The utility model relates to the technical field of seats, in particular to a seat with a foldable backrest.

Background

Most of the existing office chairs are of an integrated structure, occupy a large space in the storage and transportation process, consume a large amount of storage and transportation resources, and have high storage and transportation cost. In recent market, foldable office chairs are also available to reduce the occupied storage and transportation space or the occupied use space, but all have complex structures and are inconvenient to use and operate. Chinese utility model CN202020331971.5 discloses an office chair with foldable backrest, including seat frame, backrest for connect seat frame with the backrest, and allow the backrest is relative seat frame pivoted rotating-structure, and to the seat frame with the limit structure that the formula is connected is dismantled to the backrest. The office chair with the foldable backrest is simple in structure, the backrest can be disassembled only by pressing the pressing head, and then the backrest is turned over and folded; however, in actual use, it is found that the limiting structures are arranged on the two sides of the seat, when the backrest is detached, the two hands are required to press the pressing heads on the two sides of the seat respectively, the limiting expansion pieces in the limiting structures on the two sides of the seat are pushed out of the seat frame, but extra power is required to turn and fold the backrest, if no extra power is provided, no matter which hand is taken away from the pressing head, the limiting expansion pieces in the limiting structures can be re-inserted into the seat frame under the action of the springs, and the backrest cannot be effectively detached and turned. Therefore, when the backrest is operated by a single person, the backrest is difficult to fold, and how to optimize the backrest to realize convenient disassembly by the single person is a problem to be further solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a seat with a foldable backrest aiming at the defects in the prior art so as to solve the technical problems in the prior art; the backrest-foldable seat can be detached and folded by a single person without the assistance of any tool, and is very convenient and fast.

The technical solution of the utility model is as follows:

a chair with a foldable backrest comprises a backrest, wherein the backrest is rotatably connected to a chair seat frame through a rotating connecting part; the backrest is detachably connected to the seat frame through the movable pin structure; the chair seat frame is provided with an elastic device acting on the backrest, and the elastic device provides an elastic force for pushing the backrest to turn over for the backrest.

Preferably, the bottom end of the backrest is provided with a limiting part, and the seat frame is provided with a supporting part for supporting the limiting part.

Preferably, the elastic device includes an elastic pad disposed between the limiting member and the supporting member.

Preferably, the elastic device includes a spring pressing member disposed between the limiting member and the supporting member and rotatably connected to the supporting member; and a spring is arranged between the spring pressing piece and the supporting piece.

Preferably, the elastic device comprises a spring push rod which is inserted into a push rod accommodating cavity on the supporting piece in a sliding manner, and a first elastic piece which blocks the spring push rod from entering the push rod accommodating cavity is arranged between the spring push rod and the supporting piece.

Preferably, the loose pin structure comprises:

one end of the movable bolt is inserted in the mounting groove of the backrest in a sliding manner;

the bolt mounting piece is mounted on the backrest and limits the other end of the movable bolt in a sliding manner;

a pressing member mounting member mounted on the seat frame;

one end of the pressing piece is inserted into the mounting hole of the chair seat frame in a sliding manner, and the other end of the pressing piece is inserted into the through hole of the pressing piece mounting piece in a sliding manner;

the parts of the loose pin structure sequentially comprise the following components in the connecting sequence from the seat frame to the backrest: the pressing piece, the pressing piece mounting part, the bolt mounting part and the movable bolt.

Preferably, a second elastic piece is arranged between the movable bolt and the backrest; one end of the movable bolt, which is far away from the backrest, penetrates through the bolt mounting piece and is inserted into the through hole of the pressing piece mounting piece in a sliding mode.

Preferably, a guide groove is formed at the through hole of the pressing member mounting member.

Preferably, one end of the movable bolt, which is far away from the backrest, is an inclined surface structure which is matched with the guide groove.

Preferably, a third elastic member is provided between the pressing member and the pressing member mounting member.

The utility model has the beneficial effects that:

1. the backrest can be automatically popped out after being disassembled, the disassembling effect is optimized, and the backrest is convenient to disassemble by a single person.

2. Can provide elastic support, support firmly, the shock attenuation is effectual.

Drawings

The utility model is further described below with reference to the accompanying drawings:

fig. 1 is a schematic view of the overall assembly structure of the present invention.

Fig. 2 is a schematic view of the backrest structure of the present invention.

Figure 3 is an exploded view of the back rest, seat frame and armrest assembly of the present invention.

Fig. 4 is a schematic view of the structure of the loose pin of the utility model.

Fig. 5 is a schematic structural view of a first elastic device according to the present invention.

Fig. 6 is a schematic structural view of a second elastic device according to the present invention.

Fig. 7 is a schematic structural view of a third elastic device of the present invention.

Shown in the figure: the backrest 1, the limiting piece 101 and the mounting groove 102;

the chair seat frame 2, a support member 201, an elastic gasket 2011, a push rod accommodating cavity 2012, a spring push rod 2013, a first elastic member 2014, a spring pressing member 2015, a mounting hole 202, a backrest connecting section 203 and a cushion connecting section 204;

the handle comprises a rotary connecting part 3, a movable pin structure 4, a movable bolt 401, a flange 4011, a second elastic piece 402, a bolt mounting piece 403, a stepped hole 4031, a pressing piece mounting piece 404, a through hole 4041, a guide groove 4042, a pressing piece 405, a clamping part 4051, a third elastic piece 406, an armrest 5 and an armrest cover 6.

Detailed Description

The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. In addition, references to the terms "vertical," "horizontal," "top," "bottom," "front," "back," "upper," "lower," "inner," "outer," and the like in embodiments of the utility model are based on the orientation or positional relationship shown in FIG. 1, or the orientation or positional relationship in which the product is conventionally used, for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, terms such as "mounted," "connected," and "fixed" in the description are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through both elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

A backrest foldable seat, referring to fig. 1 to 7, comprising a backrest 1, wherein the backrest 1 is rotatably connected to a seat frame 2 through a rotary connecting part 3; the chair backrest also comprises a movable pin structure 4, and the backrest 1 is detachably connected to the chair seat frame 2 through the movable pin structure 4; the chair seat frame 2 is provided with an elastic device acting on the backrest 1, and the elastic device provides an elastic force for pushing the backrest 1 to turn over for the backrest 1.

Preferably, during normal use, the backrest 1 is vertically connected to the seat frame 2, one end of a movable bolt 401 of the movable pin structure 4 is inserted into the backrest 1, the other end of the movable bolt is inserted into the seat frame 2, and the rotary connecting part 3 is combined to form an integral clamping structure, so that the backrest 1 is ensured to be stably installed. When the backrest is disassembled, the movable bolt 401 inserted into the seat frame 2 needs to be pushed out of the seat frame 2, and after the movable bolt is pushed out, the backrest 1 is connected with the seat frame 2 only through the rotary connecting part 3; owing to there is the resilient means, set up and be in resilient means on the seat frame 2 can be right backrest 1 forms an extrapolated elastic force, promotes 1 upset of backrest, works as 1 upset back of backrest, loose pin mounting structure on the backrest 1 with loose pin mounting structure on the seat frame 2 can form the dislocation, at this moment, even lift off the power that is used for promoting movable bolt 401, movable bolt 401 can not reinsert yet in the seat frame 2, seat frame 2 with be in the rotation connection state between the backrest 1, can overturn around seat frame 2 with backrest 1, form the structure that the backrest is folded on the cushion, effectively reduce the volume of transportation, storage, optimize storage space, reduce the cost of transportation. Further, the elastic device may be a spring structure directly disposed between the seat frame 2 and the backrest 1, or may be other elastic structures proposed based on the disclosure of the present invention, and will be described in detail with reference to specific embodiments below.

As a first embodiment of the present invention, referring to fig. 1 to 5, the present invention includes a seat frame 2, where the seat frame 2 includes a backrest connecting section 203 and a seat cushion connecting section 204; the cushion connecting section 204 is connected with a cushion, and the cushion is generally mounted on the cushion connecting section 204 by adopting a screw structure, which is not detailed herein; the backrest 1 is connected to the backrest connecting section 203, the backrest 1 in this embodiment is a frame structure, and materials such as mesh cloth and sponge can be arranged on the frame structure, so that the diversity of the backrest 1 is increased. The connection between the backrest 1 and the backrest connection section 203 comprises two parts: a rotating coupling portion and a detachable coupling portion. In this embodiment, the rotation connection portion is located at the upper end of the backrest connection section 203, the backrest 1 is rotatably connected to the backrest connection section 203 through the rotation connection portion 3, the rotation connection portion 3 may be a hole-shaft fit connection structure, for example, a fitting hole is provided on the backrest 1, and a rotation shaft correspondingly fitted is provided on the backrest connection section 203; other common hinge structures are possible and will not be described in detail here. The detachable connecting part is positioned at the lower end part of the backrest connecting section 203, and the backrest 1 is detachably connected to the backrest connecting section 203 through the loose pin structure 4. Furthermore, an armrest 5 is rotatably connected to one side of the seat frame 2, which is away from the backrest 1, and an armrest cover 6 is arranged at a rotary connection position of the armrest 5 and the seat frame 2.

Preferably, the movable pin structure 4 includes a movable pin 401 slidably inserted into the mounting groove 102 of the backrest 1, a second elastic member 402 is disposed between the movable pin 401 and the backrest 1, in this embodiment, a flange 4011 is disposed on the movable pin 401, and the second elastic member 402 is preferably a spring structure, and the spring is clamped and mounted between the flange 4011 and the backrest 1. Further, a bolt mounting piece 403 is arranged at the notch of the mounting groove 102 on the backrest 1, and a stepped hole 4031 through which one end of the movable bolt 401 away from the backrest 1 can pass and which blocks the flange 4011 from passing is arranged on the bolt mounting piece 403; by installing the bolt installation member 403 with the stepped hole 4031, the movable bolt 401 can be limited in sliding, so that the movable bolt 401 is prevented from sliding out of the installation groove 102 as a whole.

Preferably, the movable pin structure 4 further includes a pressing member 405, one end of the pressing member 405 is slidably inserted into the mounting hole 202 of the seat frame 2, and the other end of the pressing member 405 is slidably inserted into the through hole 4041 of the pressing member mounting member 404, and the pressing member mounting member 404 is mounted at the position of the mounting hole 202 of the seat frame 2. Further, a third elastic member 406 is disposed between the pressing member 405 and the pressing member mounting member 404, in this embodiment, a locking portion 4051 having a flange structure is disposed on the pressing member 405, and the third elastic member 406 is preferably of a spring structure, and the spring is interposed between the locking portion 4051 and the pressing member mounting member 404.

Further preferably, when the seat is in normal use, one end of the movable latch 401, which is far away from the backrest 1, passes through the stepped hole 4031 of the latch mounting member 403 and is inserted into the through hole 4041 of the pressing member mounting member 404; and clamping the backrest 1 on the seat frame 2 to prevent the backrest 1 from rotating. At this time, the pressing piece 405 and the movable latch 401 are inserted into the through hole 4041 in an opposite manner, and the movable latch 401 can be pushed out from the through hole 4041 by pressing the pressing piece 405, that is, the movable latch 401 is pushed out from the seat frame 2, thereby completing the detachment of the movable latch structure 4.

Preferably, as shown in fig. 4, a guide groove 4042 is provided at the through hole 4041 of the pressing member mounting member 404, the guide groove 4042 is a slope structure, a small notch of the guide groove 4042 faces a junction of the through hole 4041 and the stepped hole 4031, and a large notch of the guide groove 4042 faces an eversion direction of the lower end portion of the backrest 1, that is, when the backrest 1 is turned over, an end of the movable latch 401 away from the backrest 1 slides out of the seat frame 2 along the guide groove 4042. Further, an end of the movable latch 401, which is away from the backrest 1, is an inclined structure which is arranged to cooperate with the guide groove 4042, so that the movable latch 401 is conveniently inserted into the through hole 4041 along the guide groove 4042, and the installation of the movable latch structure 4 is optimized. Moreover, when the pressing piece 405 is pressed to push the movable pin 401 out of the through hole 4041 and continue to push, because the end of the movable pin 401 is of a slope structure and the backrest 1 and the seat frame 2 are only connected in a rotating manner, the pressing piece 405 pushes the movable pin 401 to move towards the backrest 1 and towards the eversion direction of the backrest 1, so that the effect of automatically ejecting the backrest 1 is achieved, and the disassembly of the backrest 1 is optimized. Still further, in order to enable the pressing piece 405 to better push the movable pin 401 to move towards the eversion direction of the backrest 1, the shaft diameter of the end of the pressing piece 405 close to the through hole 4041 is smaller than the shaft diameter of the end of the movable pin 401 far from the backrest 1, so that the thrust action point of the pressing piece 405 is located on the inclined surface of the movable pin 401.

Preferably, a limiting member 101 is disposed at the bottom end of the backrest 1, and a supporting member 201 for supporting the limiting member 101 is disposed on the seat frame 2; the supporting member 201 is provided with an elastic device acting on the limiting member 101, in this embodiment, the elastic device is an elastic gasket 2011 disposed between the limiting member 101 and the supporting member 201, and the elastic gasket 2011 may be a spring structure, or a block structure made of elastic materials such as rubber and silica gel, and is not described in detail here. When the backrest 1 is installed on the seat frame 2, the supporting member 201 supports the limiting member 101 through the elastic pad 2011, the elastic pad 2011 is in a compressed state and generates an elastic force, and the elastic force can enable the connection between the backrest 1 and the seat frame 2 to be more tightly attached, so that the installation effect between the backrest 1 and the seat frame 2 is optimized, and the installation stability is improved. Further, when a person sits on the seat, the back of the person presses the upper end of the backrest 1, and at this time, the lower end of the backrest 1 tends to rotate toward the seat frame 2; the limiting member 101 may press and collide with the supporting member 201, which may easily cause vibration of the backrest 1 and may easily form impact on a connection structure between the backrest 1 and the seat frame 2; the elastic gasket 2011 can slow down the collision of the limiting piece 101 on the supporting piece 201, further slow down the collision of the backrest 1 on the seat frame 2, play a role in damping vibration of the backrest 1 and optimize the sitting feeling of a human body; meanwhile, the impact on the connecting structure between the backrest 1 and the seat frame 2 is weakened, and the service life of the seat is prolonged. When the loose pin structure 4 is disassembled, the elastic gasket 2011 returns to the original state from the compressed state, and generates an outward-pushing elastic force on the backrest 1 to push the backrest 1 to overturn, so that the effect of automatically popping up the backrest 1 is formed, and the disassembly of the backrest 1 is optimized.

As a second embodiment of the present invention, referring to fig. 6, according to the first embodiment, the elastic device includes a spring pressing member 2015 disposed between the limiting member 101 and the supporting member 201 and rotatably connected to the supporting member 201; a spring is disposed between the spring follower 2015 and the support 201. The spring pressing part 2015 forms an elastic pushing force for pushing the backrest 1 to turn under the action of the spring to the limiting part 101. Specifically, when the limiting member 101 pushes the spring pressing member 2015 to move close to the supporting member 201, the spring is compressed and deformed, and the spring pressing member 2015 generates an elastic pushing force towards the limiting member 101 in the eversion direction of the backrest 1 under the action of the spring. When the movable pin structure 4 is disassembled, the elastic thrust can push the backrest 1 to overturn, so that the effect of automatic ejection of the backrest 1 is formed, and the disassembly of the backrest 1 is optimized.

As a third embodiment of the present invention, referring to fig. 7, the elastic device includes a spring plunger 2013 slidably inserted into the plunger receiving cavity 2012 of the supporting member 201, an opening of the plunger receiving cavity 2012 faces the limiting member 101, and a first elastic member 2014 is disposed between the spring plunger 2013 and the supporting member 201 and prevents the spring plunger 2013 from entering the plunger receiving cavity 2012, and in this embodiment, the first elastic member 2014 is preferably of a spring structure. Specifically, when the retainer 101 pushes the spring plunger 2013 into the plunger receiving cavity 2012, the first elastic member 2014 is compressed, and during the compression process, as the deformation degree of the first elastic member 2014 increases, the external pushing force of the first elastic member 2014 on the spring plunger 2013 is also greater, and the spring plunger 2013 forms an elastic pushing force towards the eversion direction of the backrest 1 on the retainer 101 under the action of the first elastic member 2014. When the movable pin structure 4 is disassembled, the elastic thrust can push the backrest 1 to overturn, so that the effect of automatic ejection of the backrest 1 is formed, and the disassembly of the backrest 1 is optimized. Further, the spring plunger 2013 is provided with a locking structure for preventing the spring plunger 2013 from completely separating from the plunger accommodating cavity 2012 under the elastic action of the first elastic element 2014, the locking structure in this embodiment is a stepped structure, and the locking structure is common general knowledge, and those skilled in the art can fully understand the present invention together with the illustration in fig. 7, so that the detailed description thereof is omitted here.

In the description herein, references to the description of the terms "embodiment," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A chair with a foldable backrest comprises a backrest (1), wherein the backrest (1) is rotatably connected to a chair seat frame (2) through a rotating connecting part (3); the chair backrest further comprises a loose pin structure (4), and the backrest (1) is detachably connected to the chair seat frame (2) through the loose pin structure (4); the method is characterized in that:

the chair seat frame (2) is provided with an elastic device acting on the backrest (1), and the elastic device provides an elastic force for pushing the backrest (1) to turn over for the backrest (1).

2. A back rest foldable seat as claimed in claim 1, wherein: the bottom of back (1) is equipped with locating part (101), be equipped with on seat frame (2) and support piece (201) of support locating part (101).

3. A back rest foldable seat as claimed in claim 2, wherein: the elastic device comprises an elastic gasket (2011) arranged between the limiting piece (101) and the supporting piece (201).

4. A back rest foldable seat as claimed in claim 2, wherein: the elastic device comprises a spring pressing part (2015) which is arranged between the limiting part (101) and the supporting part (201) and is rotationally connected to the supporting part (201); a spring is arranged between the spring pressing part (2015) and the support part (201).

5. A back rest foldable seat as claimed in claim 2, wherein: the elastic device comprises a spring push rod (2013) which is inserted in a push rod accommodating cavity (2012) on the supporting piece (201) in a sliding mode, and a first elastic piece (2014) which blocks the spring push rod (2013) from entering the push rod accommodating cavity (2012) is arranged between the spring push rod (2013) and the supporting piece (201).

6. A back rest foldable seat as claimed in claim 1, wherein: the loose pin structure (4) comprises:

one end of the movable bolt (401) is inserted in the mounting groove (102) of the backrest (1) in a sliding manner;

the bolt mounting piece (403) is mounted on the backrest (1) and used for limiting the other end of the movable bolt (401) in a sliding manner;

a pressing piece mounting member (404) mounted on the seat frame (2);

the pressing piece (405) is inserted into the mounting hole (202) of the chair seat frame (2) in a sliding mode at one end, and is inserted into the through hole (4041) of the pressing piece mounting piece (404) in a sliding mode at the other end;

the parts of the loose pin structure (4) sequentially comprise the following components in the connecting sequence from the chair seat frame (2) to the backrest (1): the pressing piece (405), the pressing piece mounting part (404), the bolt mounting part (403) and the movable bolt (401).

7. A foldable back-rest seat as claimed in claim 6, wherein: a second elastic piece (402) is arranged between the movable bolt (401) and the backrest (1); one end of the movable bolt (401), which is far away from the backrest (1), penetrates through the bolt mounting piece (403) and is inserted into the through hole (4041) of the pressing piece mounting piece (404) in a sliding mode.

8. A back rest foldable seat as claimed in claim 7, wherein: the through hole (4041) of the pressing piece mounting part (404) is provided with a guide groove (4042).

9. A back rest foldable seat as claimed in claim 8, wherein: one end of the movable bolt (401), which is far away from the backrest (1), is of an inclined surface structure which is matched with the guide groove (4042) to be arranged.

10. A back rest foldable seat as claimed in claim 7, wherein: a third elastic piece (406) is arranged between the pressing piece (405) and the pressing piece mounting piece (404).