CN218922150U

CN218922150U - Chair waist rest

Info

Publication number: CN218922150U
Application number: CN202223000620.4U
Authority: CN
Inventors: 陈琼
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-04-28
Anticipated expiration: 2032-11-08

Abstract

The utility model provides a chair lumbar support, including installing the connecting seat on the chair, sliding connection is in the connecting seat from top to bottom and with the sliding part that lumbar support portion is connected, the connecting seat front end is opened there is the sawtooth groove, the sliding part rear end is equipped with the gear piece, the gear piece outside is equipped with the mounting groove, the gear piece includes the main part, the main part rear end is equipped with the flat key that is located the sawtooth groove, the elasticity reset piece that presses the main part right is installed in the main part left side, the sawtooth groove upper end is equipped with and opens the striking groove in the connecting seat, make flat key get into the striking inslot and make latch portion and flat key be in the vertical state that corresponds with blocking portion through upwards moving the sliding part, the main part lower extreme is equipped with the latch portion that the protrusion set up, be equipped with the sawtooth groove in this application and with sawtooth groove matched with gear piece adjust the corresponding high position that control lumbar support for the stability after leaning on is better, can not fall back to the minimum position under the effect of downward pressure, and adjust the mode is reasonable, life.

Description

Chair waist rest

Technical Field

The utility model relates to the technical field of chairs, in particular to a chair lumbar support.

Background

The lumbar support is an indispensable part in the current chairs, and the chair lumbar support needs to be adjusted in height for users with different heights and different requirements.

An office chair supported by a waist rest with the application number of CN202023048918.3 relates to the technical field of office chairs. The chair specifically comprises a chair seat for sitting down a person, armrests arranged on two sides of the chair seat and used for supporting arms, a chair back arranged at the tail end of the chair seat and used for supporting the back, and chair legs arranged at the bottom of the chair seat and used for supporting the chair seat; the waist rest for supporting the waist is arranged in the middle of one surface of the chair back, which is close to the chair seat, and the chair further comprises a height adjusting device and a length adjusting device, wherein the height adjusting device is used for adjusting the height of the waist rest on the chair back, and the length adjusting device is used for adjusting the length of the waist rest extending from the chair back. Although the height can be adjusted, the height adjusting device is locked through the balls and the through holes, so that the waist is poor in stability after being leaned against positioning, the waist is enabled to move downwards when encountering larger downward pressure, the balls can outwards extrude the guide rail to form an open hole part during adjustment, and the guide rail can deform under the extrusion action of the balls after long-term use, so that the height adjusting device is invalid, and the adjusting mode of the height adjusting device is unreasonable.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides the chair waist rest, which has the advantages of good stability after height adjustment, reasonable adjustment mode and longer service life.

The utility model solves the technical problems by adopting the technical scheme that: the utility model provides a chair lumbar support, including installing the connecting seat on the chair, sliding connection is in the connecting seat from top to bottom and with the sliding part that lumbar support portion is connected, the connecting seat front end is opened there is the sawtooth groove, the sliding part rear end is equipped with the gear piece, the gear piece outside is equipped with the mounting groove of opening at sliding part rear end, the gear piece includes the main part, the main part rear end is equipped with sliding connection's flat key in the sawtooth groove, the elastic return piece with the main part right-hand pressing is installed in the main part left side, the sawtooth groove upper end is equipped with and opens the striking groove in the connecting seat, make the flat key get into the striking inslot and make latch portion and flat key be in the vertical state that corresponds with the blocking part through upwards moving the sliding part, the main part lower extreme is equipped with the latch portion that the protrusion set up, the sliding part rear end is equipped with and is used for spacing latch portion makes the flat key be in the blocking part of vertical state, be equipped with the sawtooth groove and with the corresponding high position of regulation control lumbar support with the sawtooth groove matched with gear piece in this application, make the waist lean on the stability after the regulation better, can not fall to the effect of minimum pressure, and the mode of adjusting, the service life is longer.

Preferably, the gear piece outside is equipped with the mounting groove of opening at the sliding part rear end, and the blocking part is including opening the blocking groove at the mounting groove lower extreme, and the striking groove is the circular arc groove structure that corresponds with the flat key, when the flat key moves up to the circular arc inslot and strikes the circular arc groove, latch portion is in vertical state and blocks on blocking groove right side under the effect of striking force, and then makes the flat key keep the vertical state that does not contact with the sawtooth groove.

Preferably, the gear piece further comprises a limiting part arranged at the left upper end of the main body piece, a clamping groove which is arranged on the plane of the rear end of the sliding part and used for limiting the limiting part to move left and right is arranged on the outer side of the limiting part, when the inner side of the blocking groove is clamped in by the clamping tooth part and is in a vertical state, the right side of the limiting part is in contact with the plane of the right end of the clamping groove to limit, and therefore the gear piece can be in a vertical state more stably.

Preferably, the elastic reset piece is a reset spring, and a spring mounting groove arranged at the rear end of the sliding part is arranged on the outer side of the reset spring.

Preferably, the waist rest part comprises a waist rest frame and a connecting part which is arranged on the waist rest frame and is rotationally connected with the sliding part, a torsion spring which is respectively connected with the sliding part and the connecting part is arranged between the sliding part and the connecting part, the sliding part comprises supporting seats arranged on the left side and the right side of the front end of the sliding part, a rotating shaft is arranged between the left supporting seat and the right supporting seat, the connecting part is arranged at the rear side of the lower end of the waist rest frame, the rear end of the connecting part is provided with a left rotating part and a right rotating part which are rotationally connected on the outer side of the rotating shaft, the torsion spring is arranged on the outer side of the rotating shaft between the left rotating part and the right rotating part, the fixed end of the torsion spring is in plane contact with the front end of the sliding part to limit, the movable end of the torsion spring is provided with a torsion spring limit groove, and the torsion spring is rotationally connected between the waist rest part and the sliding part through the torsion spring, so that the waist rest part can have certain supporting force when being rotated backwards in use, and the comfort degree of the waist rest part is better.

Preferably, a limiting cover positioned at the upper end of the torsion spring is fixedly connected between the left supporting seat and the right supporting seat, a rotating gap positioned between the limiting cover and the connecting portion is arranged at the upper end of the connecting portion, and the rotating angle of the lumbar support portion is limited by arranging the rotating gap.

Preferably, the connecting seat comprises a base plate fixedly connected with the chair at the rear end, the front end of the base plate is provided with a containing cavity, the sawtooth groove is formed in the center position of the inner side of the containing cavity, the rear end of the sliding part is slidably connected with the inner side of the containing cavity, the left end and the right end of the sliding part are provided with sliding channels, the inner sides of the sliding channels are slidably connected with cover plates covered at the front end of the base plate, and the sliding parts are more convenient to install and detach.

The beneficial effects of the utility model are as follows: the gear groove and the gear piece matched with the gear groove are used for adjusting and controlling the corresponding height position of the waist rest, so that the waist rest has good stability after adjustment, the adjustment mode of the gear piece and the gear groove is more reasonable, the service life is longer, the impact groove which corresponds to the flat key and drives the flat key and the tooth part to rotate is arranged, the tooth part is clamped into the mounting groove to be in a vertical state after the flat key impacts the impact groove, and the flat key is prevented from being clamped in the gear groove, so that the waist rest can be quickly adjusted downwards.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a sliding portion;

FIG. 3 is a cross-sectional view of a sliding portion;

FIG. 4 is a schematic installation diagram of the connecting portion and the sliding portion;

fig. 5 is a rear view of the slide;

FIG. 6 is a schematic view of a structure of a connecting base;

fig. 7 is a schematic view of the position of the shift member when the sliding portion moves down.

Reference numerals illustrate: 1. the connecting seat, 2, the lumbar support part, 4, the sliding part, 5, the sawtooth groove, 6, the mounting groove, 7, the gear piece, 8, the main body piece, 9, the flat key, 10, the lumbar support frame, 12, the torsion spring, 24, the striking groove, 25, the elastic resetting piece, 26, the spring mounting groove, 27, the limiting part, 28, the clamping groove, 29, the latch part, 30, the blocking part, 31, the base plate, 32, the accommodating cavity, 33, the sliding channel, 34, the cover plate, 35, the connecting part, 36, the supporting seat, 37, the rotating shaft, 38, the rotating part, 39, the torsion spring limiting groove, 40, the limiting cover, 41 and the rotating gap.

Detailed Description

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

embodiment one:

referring to fig. 1, 5, 6 and 7, there are shown: in this embodiment, a chair lumbar support, including installing connecting seat 1 on the chair, upper and lower sliding connection is in connecting seat 1 and with the sliding part 4 that lumbar support portion 2 is connected, connecting seat 1 front end is opened there is saw tooth groove 5, sliding part 4 rear end is equipped with gear piece 7, the gear piece 7 outside is equipped with the mounting groove 6 of opening at sliding part 4 rear end, gear piece 7 includes main part 8, main part 8 rear end is equipped with sliding connection's flat key 9 in saw tooth groove 5, main part 8 left side is installed and is pressed main part 8 right elasticity reset piece 25, saw tooth groove 5 upper end is equipped with and opens impact groove 24 in connecting seat 1, make flat key 9 get into impact groove 24 inboard and make tooth clamping portion 29 and flat key 9 be in the vertical state that corresponds with blocking portion 30 through upwards moving sliding part 4, main part 8 lower extreme is equipped with the tooth clamping portion 29 that the protrusion set up, sliding part 4 rear end is equipped with and is used for spacing tooth clamping portion 29 makes flat key 9 be in the blocking portion 30 of vertical state, be equipped with tooth groove and with the effect that the flat key 9 leaned on the corresponding position of adjustment mode of sawtooth groove and lower back to the waist position, the effect that can not adjust the lower than the appropriate, the stability of the lower back position can be adjusted to the lower than the appropriate.

Preferably, referring to fig. 5, the blocking portion 30 may be a blocking groove disposed at the lower end of the mounting groove 6, the striking groove 24 is an arc groove structure corresponding to the flat key 9, and when the inner side of the blocking groove is blocked by the latch portion, the right side of the limiting portion contacts with the right end plane of the blocking groove to limit, so that the gear member can be more stable in a vertical state.

Referring to fig. 5, the gear member 7 further includes a limiting portion 27 disposed at the upper left end of the main body member 8, a clamping groove 28 that is formed on the outer side of the limiting portion 27 and limits the left-right movement of the limiting portion 27 on the plane of the rear end of the sliding portion 4, and when the inner side of the blocking groove is clamped into the clamping tooth portion, the right side of the limiting portion contacts with the plane of the right end of the clamping groove to limit the position, so that the gear member can be more stable in a vertical state.

Referring to fig. 6, the connection base 1 includes a base plate 31 fixedly connected with a chair at the rear end, a receiving cavity 32 is formed at the front end of the base plate 31, a serration groove 5 is formed at the center position of the inner side of the receiving cavity 32, the rear end of the sliding part 4 is slidably connected with the inner side of the receiving cavity 32, sliding channels 33 are formed at the left and right ends of the sliding part 4, a cover plate 34 covering the front end of the base plate 31 is slidably connected with the inner side of the sliding channels 33, the cover plate 34 is fixedly connected with the front end of the base plate 31 through screws, and the sliding part 4 is limited and simultaneously guided.

When the waist rest in the embodiment needs to be adjusted upwards, the sliding part 4 is driven to move upwards by moving the waist rest part 2 upwards, and the flat key 9 presses the elastic reset piece 25 leftwards under the action of the sawtooth groove 5 until the elastic reset piece is clamped into the tooth groove with the upper end at the corresponding height again; when the lumbar support needs to be adjusted downwards, the lumbar support part 2 and the sliding part 4 are moved upwards rapidly, the flat key 9 at the rear end of the gear piece 7 is driven to strike the mounting groove 6 under the guiding action of the sawtooth groove 5, the flat key 9 is in a vertical state under the action of the mounting groove 6, the latch part 29 at the lower end of the main body piece 8 is further in a vertical state, the latch part 29 in the vertical state moves downwards to the blocking groove under the action of the striking force, the latch part 29 contacts with the inner wall of the blocking groove to limit under the action of the elastic reset piece 25, the flat key is further kept to be vertical and not contacted with the sawtooth groove 5 to limit, the lumbar support part 2 and the sliding part 4 are moved downwards to the bottommost end, the flat key 9 contacts with the inner wall at the lower end of the sawtooth groove 5, and the flat key 9 drives the latch part 29 to move upwards to be separated from the blocking groove, and the gear piece 7 is restored to the position clamped with the sawtooth groove 5 again.

Embodiment two:

referring to fig. 5, in comparison with the first embodiment, the elastic restoring member of the present embodiment employs a restoring spring, and a spring mounting groove 26 provided at the rear end of the sliding portion 4 is provided outside the restoring spring.

Referring to fig. 4, the lumbar support 2 in this embodiment includes a lumbar support frame 10 and a connection portion 35 mounted on the lumbar support frame 10 and rotatably connected to the sliding portion 4, the connection portion 35 and the lumbar support frame 10 are integrally configured, and a torsion spring 12 for supporting the lumbar support 2 is mounted between the sliding portion 4 and the connection portion 35.

Referring to fig. 2 and 3, in this embodiment, the sliding portion 4 includes supporting seats 36 disposed on left and right sides of a front end of the sliding portion 4, a rotation shaft 37 is disposed between the left and right supporting seats 36, a connection portion 35 is disposed on a rear side of a lower end of the lumbar support frame 10, a left and right rotation portion 38 rotatably connected to the outer side of the rotation shaft 37 is disposed at a rear end of the connection portion 35, a torsion spring 12 is mounted on the outer side of the rotation shaft 37 between the left and right rotation portions 38, a fixed end of the torsion spring 12 is in plane contact with a front end of the sliding portion 4 to limit, a torsion spring limit groove 39 is formed at an upper end of the connection portion 35, a movable end of the torsion spring 12 is mounted in the torsion spring limit groove 39, and the lumbar support portion is rotatably connected with the sliding portion through the torsion spring, so that a forward supporting force is provided under the action of the torsion spring when the lumbar support portion is propped backward, and comfort of the lumbar support is better.

Referring to fig. 3, a limit cover 40 is fixedly connected between the left and right support seats 36 at the upper end of the torsion spring 12. The limit cover 40 and the supporting seat 36 are designed into an integrated structure;

the upper end of the connecting part 35 is provided with a rotary gap 41 between the limiting cover 40 and the connecting part 35, the rotary gap 41 is the maximum rotary angle of the backward rotation of the connecting part 35, and then the rotary angle of the lumbar support part is limited by arranging the rotary gap 41, so that the backward overturning angle of the lumbar support part is prevented from being too large, and the supporting effect is lost.

While the utility model has been shown and described with reference to a preferred embodiment, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the utility model.

Claims

1. The utility model provides a chair waist is leaned on, including installing connecting seat (1) on the chair, upper and lower sliding connection in connecting seat (1) and with waist portion (2) the sliding part (4) of being connected, saw tooth groove (5) are opened to connecting seat (1) front end, sliding part (4) rear end is equipped with gear piece (7), characterized by: the gear piece (7) outside is equipped with the mounting groove (6) of opening at sliding part (4) rear end, gear piece (7) include main part (8), main part (8) rear end is equipped with sliding connection flat key (9) in sawtooth groove (5), elastic return piece (25) with main part (8) right-hand pressing are installed in main part (8) left side, sawtooth groove (5) upper end is equipped with and opens striking groove (24) in connecting seat (1), make flat key (9) get into striking groove (24) inboard and make latch portion (29) and flat key (9) be in the vertical state that corresponds with blocking portion (30) through upwards moving sliding part (4), main part (8) lower extreme is equipped with latch portion (29) that the protrusion set up, sliding part (4) rear end is equipped with and is used for spacing latch portion (29) to make flat key (9) be in blocking portion (30) of vertical state.

2. The chair lumbar support according to claim 1, wherein: the blocking part (30) comprises a blocking groove which is arranged at the lower end of the mounting groove (6), and the impact groove (24) is of an arc groove structure corresponding to the flat key (9).

3. The chair lumbar support according to claim 2, wherein: the gear piece (7) further comprises a limiting part (27) arranged at the left upper end of the main body piece (8), and a clamping groove (28) which is arranged on the rear end plane of the sliding part (4) and used for limiting the limiting part (27) to move left and right is arranged on the outer side of the limiting part (27).

4. The chair lumbar support according to claim 1, wherein: the elastic reset piece (25) is a reset spring, and a spring mounting groove (26) which is arranged at the rear end of the sliding part (4) is arranged on the outer side of the reset spring.

5. The chair lumbar support according to claim 1, wherein: the lumbar support part (2) comprises a lumbar support frame (10) and a connecting part (35) which is arranged on the lumbar support frame (10) and is rotationally connected with the sliding part (4), and a torsion spring (12) which is respectively connected with the sliding part (4) and the connecting part (35) is arranged between the sliding part (4) and the connecting part (35).

6. The chair lumbar support according to claim 5, wherein: the utility model provides a sliding part (4) including setting up supporting seat (36) in sliding part (4) front end left and right sides, control be equipped with rotation axis (37) between supporting seat (36), connecting portion (35) set up in waist lean on frame (10) lower extreme rear side, connecting portion (35) rear end are equipped with about two rotation connection rotation portion (38) in rotation axis (37) outside, torsion spring (12) are installed about rotation axis (37) outside between rotation portion (38), the stiff end of torsion spring (12) is spacing with sliding part (4) front end plane contact, connecting portion (35) upper end is opened there is torsional spring spacing groove (39), the expansion end of torsion spring (12) is installed in torsional spring spacing groove (39).

7. The chair lumbar support according to claim 6, wherein: a limiting cover (40) positioned at the upper end of the torsion spring (12) is fixedly connected between the left supporting seat (36) and the right supporting seat, and a rotary gap (41) positioned between the limiting cover (40) and the connecting portion (35) is arranged at the upper end of the connecting portion (35).

8. The chair lumbar support according to claim 1, wherein: the connecting seat (1) comprises a base plate (31) fixedly connected with the back end and a chair, a containing cavity (32) is formed in the front end of the base plate (31), the sawtooth groove (5) is formed in the center position of the inner side of the containing cavity (32), the back end of the sliding part (4) is slidably connected with the inner side of the containing cavity (32), sliding channels (33) are formed in the left end and the right end of the sliding part (4), and cover plates (34) covering the front end of the base plate (31) are slidably connected with the inner side of the sliding channels (33).