CN212815352U

CN212815352U - Backrest chair adjusting structure

Info

Publication number: CN212815352U
Application number: CN202021354327.6U
Authority: CN
Inventors: 冯其兴
Original assignee: Foshan Aishu Furniture Co ltd
Current assignee: Foshan Aishu Furniture Co ltd
Priority date: 2020-07-11
Filing date: 2020-07-11
Publication date: 2021-03-30
Anticipated expiration: 2030-07-11

Abstract

The utility model relates to a backrest chair adjusting structure, which comprises a backrest, a holding piece and an angle adjusting base; the backrest is provided with a backrest surface layer with elasticity; the angle adjusting base is arranged on the backrest; the angle modulation base is provided with a sliding surface with an arc section, and the abutting piece is connected with the angle modulation base in a sliding mode and abuts against the backrest surface layer. In the utility model, the holding piece can slide and keep along the sliding surface with the arc section; it is possible to achieve that the angle of the holding piece can be adjusted as required; ensuring the comfort of the user of the chair.

Description

Backrest chair adjusting structure

Technical Field

The utility model relates to a backrest chair adjusting structure.

Background

In the backrest of the traditional backrest chair, a propping piece 2 for propping against the waist of a human body is arranged at the lower part of the backrest, and the angle and the front and back positions of the propping piece are fixed; can not be adjusted according to the needs, thereby being incapable of meeting the individual requirements of users of the back rest chair, such as different requirements caused by height, hardness of propping against the waist, personal habits and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve at least one among the above-mentioned technical problem.

The utility model discloses the means of taking do: the backrest chair adjusting structure comprises a backrest, a propping piece and an angle adjusting base; the backrest is provided with a backrest surface layer with elasticity; the angle adjusting base is arranged on the backrest; the angle modulation base is provided with a sliding surface with an arc section, and the abutting piece is connected with the angle modulation base in a sliding mode and abuts against the backrest surface layer.

The utility model discloses the function that realizes does: the abutting piece can slide and keep along a sliding surface with a circular arc section.

The utility model discloses the effect that reaches does: it is possible to achieve that the angle of the holding piece can be adjusted as required; ensuring the comfort of the user of the chair.

The further technical proposal also comprises a front and back adjusting structure; the front and back adjusting structure comprises a translation base body fixedly connected with the backrest, and the angle adjusting base is linearly and slidably connected with the translation base body and can be kept relative to the translation base body.

The positions of the angle adjusting base and the abutting piece can be adjusted back and forth according to requirements, and the comfort of a user of the backrest chair is ensured.

According to a further technical scheme, the front-back adjusting structure further comprises a retaining piece, the angle adjusting base is provided with a translation hole, the translation base is embedded into the translation hole, and the retaining piece is in threaded connection with the translation base and abuts against the retaining piece.

The structure is simple, and no bolt is arranged.

According to a further technical scheme, the front-back adjusting structure further comprises an anti-rotation structure, and the anti-rotation structure comprises anti-rotation protrusions and anti-rotation grooves; one of the anti-rotation protrusion and the anti-rotation groove is arranged in the translation hole, the other one of the anti-rotation protrusion and the anti-rotation groove is arranged on the translation base body, and the anti-rotation protrusion is embedded into the anti-rotation groove.

The rotation of the angle adjusting base around the axis of the translation base body when the holder is rotated can be prevented.

According to the further technical scheme, a backrest base body which is bent backwards is fixedly arranged on the backrest, and the translation base body is fixed to the front side of the backrest base body.

The strength of the backrest can be improved while preventing the translational base from protruding from the rear side of the backrest.

According to the further technical scheme, the angle adjusting base is in a sheet shape, the abutting piece is fixedly provided with the sliding groove lug, the sliding groove lug and the abutting piece are encircled to form a sliding groove, and the angle adjusting base penetrates through the sliding groove in a fitting mode.

The technical scheme is that the angle adjusting device further comprises a gear structure, the gear structure comprises a wave bead and two gear grooves of the wave bead, one of the wave bead and the gear grooves is arranged on the abutting piece, the other one of the wave bead and the gear grooves is arranged on the angle adjusting base, and a top ball of the wave bead is inserted into the gear grooves.

The gear effect can be realized.

In a further technical scheme, the gear groove is in a circular segment shape.

In a further technical scheme, more than two rows of gear grooves are formed.

The repulsive force of the top ball of the wave bead received by the angle adjusting base can be ensured to be more uniform, and the gear effect is ensured.

According to a further technical scheme, the abutting piece further comprises an expansion body provided with air holes, the abutting piece is fixedly provided with an elastic arm, and the expansion body is fixedly connected with the elastic arm.

To sum up, the utility model discloses the effect that probably realizes does:

1) the angle of the abutting piece can be adjusted according to the requirement; the comfort of the user of the backrest chair is ensured;

2) the positions of the angle adjusting base and the abutting piece can be adjusted back and forth according to requirements, so that the comfort of a user of the backrest chair is ensured;

3) the gear effect can be realized and guaranteed.

Drawings

Fig. 1 is a schematic perspective view of an adjustment structure of a back rest chair according to an embodiment of the present invention; the back cover 19 is not shown.

Fig. 2 is a schematic perspective view of an adjustment structure of a back rest chair according to an embodiment of the present invention; the back cover 19 is not shown.

Fig. 3 is a schematic perspective view of an adjustment structure of a back rest chair according to an embodiment of the present invention; the seat assembly 9 and the back panel 19 are not shown.

Fig. 4 is a schematic side view of a back rest chair adjustment structure according to an embodiment of the present invention; the seat assembly 9 and the back panel 19 are not shown.

Fig. 5 is a perspective view of the holding member 2.

Fig. 6 is a perspective view of the recliner base 3.

Fig. 7 is a schematic cross-sectional side view of the holding member 2 and the recliner base 3; the section is a vertical plane passing through the axis of the wave bead 51; hatching is not shown; the thick and thin line arrows indicate the directions in which the retainer 2 can slide along the sliding surface 31.

A backrest 1; a backrest base 11; a back cover 19; a holding member 2; a chute 21; a chute ear 211; an extension body 29; the resilient arms 291; an air hole 299; an angle adjusting base 3; a sliding surface 31; the translation aperture 34; a front-rear adjusting structure 4; translating the substrate 41; threads 411; the retainer 42; an anti-rotation structure 43; an anti-rotation protrusion 431; an anti-rotation groove 432; a gear structure 5; beads 51; a spring 519; a shift gate 52; a chair assembly 9; a seat cushion 91; support the feet 92.

Detailed Description

The technical solution of the present invention will be described below with reference to the accompanying drawings of the embodiments of the present invention.

As a specific embodiment, the backrest chair adjusting structure of the embodiment of the present invention includes a backrest 1, a holding member 2 and an angle adjusting base 3; the backrest 1 is provided with a backrest surface layer 19 having elasticity.

Typically, the backrest 1 is fixedly attached or hinged to the seat assembly 9, and a person can sit on the seat cushion 91 and the back can rest on the backrest 1.

The back cover 19 is typically an elastic, breathable fabric, and is bonded to the back 1 or crimped thereto by a frame (not shown) for use as a back rest.

Usually, the top end of the backrest 1 is further provided with a back cushion (not shown in the drawings) for supporting the head of a human body.

The recliner base 3 is provided on the backrest 1.

The angle adjusting base 3 is provided with a sliding surface 31 with an arc section, and the abutting piece 2 is connected with the angle adjusting base 3 in a sliding way and abuts against the backrest surface layer 19, so that the abutting piece 2 can slide along the sliding surface 31 and be kept.

Usually, the propping piece 2 and the angle adjusting base 3 are arranged at the lower part of the backrest 1, so that the propping piece 2 props against the waist of the human body,

the working principle is as follows: the holding member 2 can slide and hold along the sliding surface 31, and the angle of the holding member 2 (for example, the included angle between the axial plane of the wave bead 51 passing through the holding member 2 and the horizontal plane) can be adjusted as required; ensuring the comfort of the user of the chair.

Further, the device also comprises a front-back adjusting structure 4; the front-back adjusting structure 4 comprises a translation base body 41 fixedly connected with the backrest 1, and the angle adjusting base 3 is linearly and slidably connected with the translation base body 41 and can be kept relative to the translation base body 41. The angle adjusting base 3 can be held relative to the translation base 41 by means of a latch, and the angle adjusting base 3 can be held relative to the translation base 41 by means of other methods. The angle adjusting base 3 can be held by friction force between the angle adjusting base and the holding piece 2, and can also be held by other modes. Generally, the translation substrate 41 is disposed horizontally, and may be disposed at an acute angle to the horizontal. The positions of the angle adjusting base 3 and the abutting part 2 can be adjusted back and forth according to requirements, so that the comfort of a user of the backrest chair is ensured.

Preferably, the front-back adjusting structure 4 further comprises a retaining member 42, the recliner base 3 is provided with a translation hole 34, and the translation base 41 is embedded in the translation hole 34, so that the recliner base 3 is linearly slidably connected with the translation base 41; the holder 42 is screwed to the translation base 41 and abuts against the holder 42. Rotating the holder 42 causes the holder 42 to move and hold along the translation base 41 against the recliner base 3. The structure is simple, and no bolt is arranged.

Preferably, the front-rear adjusting structure 4 further comprises an anti-rotation structure 43, and the anti-rotation structure 43 comprises an anti-rotation protrusion 431 and an anti-rotation groove 432; one of the rotation preventing projection 431 and the rotation preventing groove 432 is provided in the translation hole 34, and the other is provided on the translation base 41, and the rotation preventing projection 431 is fitted into the rotation preventing groove 432. The recliner base 3 can be prevented from rotating around the axis of the translation base 41 when the holder 42 is rotated.

Further, the backrest 1 is fixedly provided with a backrest base 11 which is bent backward, and the translation base 41 is fixed to the front side of the backrest base 11. It is possible to improve the strength of the backrest 1 while preventing the translation base 41 from protruding from the rear side of the backrest 1.

As an embodiment, the angle adjusting base 3 is sheet-shaped, the abutting member 2 is fixedly provided with a sliding groove lug 211, the sliding groove lug 211 and the abutting member 2 surround to form a sliding groove 21, and the angle adjusting base 3 passes through the sliding groove 21 in a fitting manner, so that the abutting member 2 is slidably connected with the angle adjusting base 3.

Further, the angle adjusting mechanism further comprises a gear structure 5, wherein the gear structure 5 comprises a wave bead 51 and two gear grooves 52, one of the wave bead 51 and the gear grooves 52 is arranged on the abutting piece 2, the other one of the wave bead 51 and the gear grooves 52 is arranged on the angle adjusting base 3, and a top ball (not marked in the drawing) of the wave bead 51 is inserted into the gear groove 52. The beads 51 are conventional beads, typically provided with a top ball that is provided with a repelling force by a spring 519. The ball-top of the ball 51 moves from one of the shift grooves 52 to the other shift groove 52 against the repulsive force of the spring 519, so that the retainer 2 can slide along the sliding surface 31 and maintain a specific position, thereby achieving a shift effect.

Preferably, the shift gate 52 is scalloped.

Further, the number of the shift grooves 52 is two or more, and the shift grooves 52 arranged along the vertical plane are one row of the shift grooves 52. The repulsive force of the top ball of the wave bead 51 received by the angle adjusting base 3 can be ensured to be uniform, and the gear effect can be ensured.

Usually, the supporting member 2 further includes an expanding body 29 having an air hole 299, the supporting member 2 is fixedly provided with an elastic arm 291, and the expanding body 29 is fixedly connected with the elastic arm 291.

It will be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for the convenience and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the scope of the present invention.

Claims

1. The backrest chair adjusting structure comprises a backrest (1), a holding piece (2) and an angle adjusting base (3); the backrest (1) is provided with a backrest surface layer (19) with elasticity; the angle adjusting seat is characterized in that an angle adjusting base (3) is arranged on a backrest (1); the angle adjusting base (3) is provided with a sliding surface (31) with an arc section, and the abutting piece (2) is connected with the angle adjusting base (3) in a sliding mode and abuts against the backrest surface layer (19) so that the abutting piece (2) can slide along the sliding surface (31) and can be kept.

2. The back rest chair adjustment structure according to claim 1, further comprising a front-rear adjustment structure (4); the front-back adjusting structure (4) comprises a translation base body (41) fixedly connected with the backrest (1), and the angle adjusting base (3) is linearly and slidably connected with the translation base body (41) and can be kept relative to the translation base body (41).

3. The back-rest chair adjustment structure according to claim 2, characterized in that the front-back adjustment structure (4) further comprises a retaining member (42), the recliner base (3) is provided with a translation hole (34), the translation base (41) is inserted into the translation hole (34), and the retaining member (42) is screwed with the translation base (41) and abuts against the retaining member (42).

4. The back rest chair adjusting structure according to claim 3, wherein the front-back adjusting structure (4) further comprises an anti-rotation structure (43), the anti-rotation structure (43) comprises an anti-rotation protrusion (431) and an anti-rotation groove (432); one of the anti-rotation protrusion (431) and the anti-rotation groove (432) is arranged in the translation hole (34), the other one is arranged on the translation base body (41), and the anti-rotation protrusion (431) is embedded in the anti-rotation groove (432).

5. The back rest chair adjustment structure according to claim 2, characterized in that the back rest (1) is fixedly provided with a back rest base (11) which is bent backwards, and the translation base (41) is fixed to the front side of the back rest base (11).

6. The backrest chair adjusting structure as claimed in claim 1, wherein the angle adjusting base (3) is sheet-shaped, the abutting member (2) is fixedly provided with a sliding groove lug (211), the sliding groove lug (211) and the abutting member (2) surround to form a sliding groove (21), and the angle adjusting base (3) passes through the sliding groove (21) in a fitting manner.

7. The backrest chair adjusting structure of claim 6, characterized by further comprising a gear structure (5), wherein the gear structure (5) comprises a wave bead (51) and two gear grooves (52), one of the wave bead (51) and the gear grooves (52) is arranged on the abutting piece (2), the other one of the wave bead (51) and the gear grooves (52) is arranged on the angle adjusting base (3), and the top ball of the wave bead (51) is inserted into the gear groove (52).

8. The back rest chair adjustment structure according to claim 7, wherein the shift groove (52) is a segment of a circle.

9. The back rest chair adjustment structure according to claim 7, wherein the number of the shift grooves (52) is two or more.

10. The back rest chair adjusting structure according to any one of claims 1 to 9, wherein the holding member (2) further comprises an expanding body (29) provided with an air hole (299), the holding member (2) is fixedly provided with an elastic arm (291), and the expanding body (29) is fixedly connected with the elastic arm (291).