CN218185959U

CN218185959U - Headrest rotation adjusting device

Info

Publication number: CN218185959U
Application number: CN202221399352.5U
Authority: CN
Inventors: 金明华; 付长骏
Original assignee: UE Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2023-01-03
Anticipated expiration: 2032-06-02

Abstract

The utility model discloses a headrest rotation adjusting device, which comprises a support, a rotation support piece and a headrest; the front end of the rotary support piece is connected with the headrest, and the rear end of the rotary support piece is in rotary fit with the support; the rotating support part is provided with a rotating cross rod, and a rotating groove is formed in the middle of the rotating cross rod; the support is correspondingly provided with a rotary matching seat; the rotary matching seat is embedded in the rotary groove, and the rotary cross rod is connected with the rotary matching seat through bolts; the bolt is used as a rotating cross rod and a rotating shaft of the rotating matching seat; a damping washer for providing damping is arranged between the bolt and the rotating cross rod; the gear adjusting mechanism is arranged between the rotary matching seat and the rotary groove; the gear adjusting mechanism comprises a plastic gear adjusting sheet arranged in the rotating groove and a hard positioning bulge correspondingly arranged at the front end of the rotating matching seat; the gear adjusting piece is pasted on the inner wall of the rotating groove, and positioning clamping grooves which are arranged at intervals and used for being clamped and matched with the positioning protrusions are formed in the gear adjusting piece.

Description

Headrest rotation adjusting device

Technical Field

The utility model relates to a thing to sit on field, in particular to headrest rotates adjusting device.

Background

People often use the chair during work or rest, and hopefully, each part of the body can be adjusted to a proper position according to the needs of the people; in the existing seat, the headrest is usually fixedly connected with the backrest of the seat, and the position and the angle of the headrest relative to the seat are fixed and unchangeable, so that the headrest cannot adapt to different body types and sitting postures of consumers. When different users rest on the seat, if the head of the user leans on the headrest of the seat, the angle and the height position of the headrest can not be adjusted as required, the comfortable angle of the headrest required by the users is difficult to meet.

The office chair with the headrest capable of being adjusted in a lifting mode, which is sold in the market at present, is not very convenient to use in the process of adjusting the headrest in the lifting mode; the main adjusting mode is that the headrest is adjusted to a fixed position and then is fixed by an adjusting nut on the headrest; or a locking mechanism is arranged to realize the lifting locking and unlocking of the headrest. These adjustment methods are not free from being hard and hard, require the user to leave the seat for adjustment, are troublesome to operate, and cannot easily adjust the height of the headrest; in addition, most of the existing headrest lifting structures are exposed outside, which affects the appearance.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a headrest rotation adjusting device; the rotary support piece is rotated relative to the support so as to adjust the height of the headrest; in the process that the rotary supporting piece rotates relative to the support, under the matching action of the positioning protrusions and the positioning clamping grooves, a plurality of adjusting gears are arranged, and the gear feeling is obvious; after the adjustment is completed, firstly, the positioning protrusions are in clamping fit with the positioning clamping grooves, and the rotation of the rotating support piece relative to the support can be limited; secondly, the damping washer can further provide damping to limit the rotation of the rotating support; so that the rotary support can stay stably at any adjusting height to support the headrest; simple structure and convenient operation.

The technical scheme of the utility model is realized like this:

a headrest rotation adjustment device comprising: a seat configured to be coupled to a seat back; a rotary support configured to connect and support the headrest; the rotary supporting piece is arranged along the front-back direction, the front end of the rotary supporting piece is connected with the headrest, and the rear end of the rotary supporting piece is in rotary fit with the support; the rotating support piece is provided with a rotating cross rod positioned at the rear part, and a rotating groove is arranged in the middle of the rotating cross rod; the support is correspondingly provided with a rotary matching seat protruding forwards; the rotary matching seat is embedded in the rotary groove, and the rotary cross rod is connected with the rotary matching seat through a bolt; the bolt penetrates through the rotating cross rod and the rotating matching seat along the left and right directions and serves as rotating shafts of the rotating cross rod and the rotating matching seat; a damping washer for providing damping is arranged between the bolt and the rotating cross rod; the gear adjusting mechanism is arranged between the rotary matching seat and the rotary groove; the gear adjusting mechanism comprises a plastic gear adjusting sheet arranged in the rotating groove and a hard positioning bulge correspondingly arranged at the front end of the rotating matching seat; the gear adjustment piece is arc-shaped, and the gear adjustment piece pastes and covers on the inner wall that rotates the recess, and is equipped with the interval on the gear adjustment piece arrange be used for with location protruding joint complex positioning channel section.

Preferably, the support, the rotary matching seat and the positioning protrusion are all made of metal materials. The support is of a metal structure, so that the rotary matching seat and the positioning bulge are high in hardness; when the relative support of work rotation support piece rotates, the location arch can the extrusion effect gear adjustment piece plastic deformation in a certain extent for the location arch can gear adjustment piece motion and joint in the positioning groove of different positions relatively.

Preferably, the gear adjusting sheet is made of a pom material. The plastic deformation can be generated to a certain extent under the extrusion action of the positioning bulge, and the relative movement can be generated between the positioning bulge and the plastic deformation; and has good wear resistance and prolonged service life.

Preferably, a bolt installation groove is concavely formed at a side end of the rotating cross bar, and the damping washer is arranged in the bolt installation groove; and the nut of the bolt is embedded in the screw mounting groove and is in compression fit with the damping washer. The damping washer has a simple structure, and has good damping effect when the acting rotary supporting piece rotates relative to the support; and after the adjustment is completed, the damping washer can provide damping for the rotating cross rod, so that the rotating support piece can rotate and stop at any height adjusting position, and the adjustment operation is very convenient.

Preferably, the damping washer is a rubber ring. Low cost and can provide good damping effect.

Preferably, a through hole transversely penetrating through the rotating groove is formed in the side end of the rotating cross rod, and a connecting hole with an internal thread is formed in the corresponding side end of the rotating matching seat; the bolt penetrates through the damping washer and the through hole in sequence and is connected in the connecting hole. The support and the rotary supporting piece can be rapidly assembled together through the bolt, and the rotary supporting piece can rotate up and down relative to the support around the bolt; the structure is very simple.

Preferably, the inner wall of the rotating groove is an arc-shaped surface; the front end of the rotary matching seat is correspondingly provided with an arc-shaped surface. When the rotating supporting piece rotates relative to the support, the rotating matching seat and the rotating groove can rotate relative to each other without interference.

Preferably, two arc-shaped limiting bosses which are spaced left and right are arranged in the middle of the inner wall of the rotating groove; a positioning groove is formed between the two limiting bosses; at least two limiting columns are arranged in the positioning groove, and limiting holes are correspondingly formed in the gear adjusting sheet; the gear adjusting sheet is embedded in the positioning groove and the limiting column is clamped in the limiting hole. Make the gear adjustment piece can stably paste and cover on the inner wall of rotation recess, can not upper and lower, left and right sides skew.

Preferably, the rotating support piece further comprises connecting support rods which respectively extend forwards from two sides of the rotating cross rod; the two connecting struts are configured to connect with a headrest. The headrest can be stably supported.

Preferably, the upper end and the lower end of the support seat positioned on the rotary matching seat are respectively provided with a decorative cover plate extending forwards. The decorative cover plate can further shield the rotating groove on the rotating cross rod, so that after the rotating support piece is matched with the support, the connecting structure is hidden between the rotating support piece and the support, and the structure is attractive.

Adopted above-mentioned technical scheme the utility model discloses a design departure point, theory and beneficial effect are:

firstly, the headrest rotation adjusting device of the utility model realizes the adjustment of the height of the headrest by rotating the rotating support piece relative to the support; a gear adjusting sheet is arranged in the rotating groove, and a positioning clamping groove is formed in the gear adjusting sheet; correspondingly arranging a positioning bulge on the rotary matching seat; the rotary supporting piece rotates relative to the support in the process, the positioning protrusions and the positioning clamping grooves are matched, a plurality of adjusting gears are arranged, and gear feeling is obvious. After the adjustment is completed, firstly, the positioning protrusions are in clamping fit with the positioning clamping grooves, and the rotation of the rotating support piece relative to the support can be limited; secondly, a damping washer for providing damping is arranged between the bolt and the rotating cross rod, and the damping washer not only has good damping hand feeling during adjustment, but also can further provide damping to limit the rotation of the rotating support piece; so that the rotary support can be stably stopped at any adjustment height to support the headrest. And only the acting force is directly applied to the rotating support part during adjustment.

Secondly, the support is of a metal structure, so that the rotary matching seat and the positioning bulge are high in hardness; the gear adjusting sheet is made of a pom material. The plastic deformation can be generated to a certain extent under the extrusion action of the positioning bulge; then when the relative support of work rotation support piece rotates, the location arch can the extrusion effect gear adjustment piece plastic deformation in the certain degree for the location arch can be relative gear adjustment piece motion and joint in the positioning groove of different positions. In addition, when the positioning protrusion is clamped with the positioning clamping groove, a click sound is generated, so that the gear feeling is very obvious in the adjusting process.

Moreover, the rotary matching seat is embedded and matched in the rotary groove, and the gear adjusting sheet and the positioning bulge are hidden between the rotary matching seat and the rotary groove; and decorative cover plates extending forwards are respectively arranged at the upper end and the lower end of the support seat positioned on the rotary matching seat; dress trim cover can be further will rotate the rotation recess on the horizontal pole and shelter from to make rotate support piece and support cooperation back, connect the vestige and can not expose outside, can beautify the outward appearance.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention illustrating an assembly of a support, a rotational support and a headrest;

fig. 2 is an exploded view of the structure of the rotary support member and the support base in the embodiment of the present invention;

fig. 3 is an exploded view of another angle of the rotational support member engaging the support in an embodiment of the present invention;

fig. 4 is a schematic perspective view of a rotary support member according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a support in an embodiment of the present invention;

fig. 6 is a side sectional view of the gear adjusting piece and the rotating fitting seat in the embodiment of the present invention;

fig. 7 is a schematic perspective view illustrating the rotation of the rotary support member downward to lower the height of the headrest according to the embodiment of the present invention;

fig. 8 is a schematic perspective view of the headrest rotation adjusting device disposed on the backrest according to the embodiment of the present invention.

The figures are numbered: a support 1; rotating the support 2; the cross bar 2a is rotated; a connecting strut 2b; a headrest 3; a chair back 4; rotating the groove 5; a rotating matching seat 6; a bolt 7; a nut 7a; a perforation 8; a connecting hole 9; a nut mounting hole 10; a damping washer 11; a gear adjusting sheet 12; a positioning boss 14; a positioning groove 15; a stopper post 16; a limiting hole 17; a positioning card slot 18; a cosmetic cover plate 19.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific implementation manner of the utility model is as follows:

as shown in fig. 1-8, the utility model provides a headrest rotation adjusting device, which comprises a support 1, a rotation support member 2 and a headrest 3; wherein, the support 1 is connected and fixed on the chair back 4; the rotary support member 2 is configured to be connected with and support the headrest 3, the front end of the rotary support member 2 is connected with the headrest 3, and the rear end of the rotary support member 2 is in rotary fit with the support 1; the height of the headrest 3 can be adjusted by acting directly on the pivoting support 2 to pivot up and down relative to the seat 1.

As shown in fig. 1 to 7, the rotary support 2 includes a rotary cross bar 2a at a rear end and connecting struts 2b respectively extending forward from both sides of the rotary cross bar 2a; the two connecting support rods 2b are connected with the headrest 3, and the headrest 3 can be stably supported. A rotary groove 5 is arranged in the middle of the rear end of the rotary cross rod 2a, and a rotary matching seat 6 protruding forwards is correspondingly arranged on the support 1; the rotary matching seat 6 can be embedded in the rotary groove 5; the rotating cross rod 2a is connected with the rotating matching seat 6 through a bolt 7, and the bolt 7 penetrates through the rotating cross rod 2a and the rotating matching seat 6 along the left-right direction and serves as a rotating shaft of the rotating cross rod and the rotating matching seat; the method specifically comprises the following steps: a through hole 8 transversely penetrating through the rotating groove 5 is formed in one side end of the rotating cross rod 2a, and a connecting hole 9 with internal threads is formed in the corresponding side end of the rotating matching seat 6; during assembly, the rotary matching seat 6 is embedded in the rotary groove 5, and then the bolt 7 penetrates through the through hole 8 from outside to inside and is connected into the connecting hole 9; so that the stand 1 can be assembled with the rotary support 2 and the rotary support 2 can be rotated up and down with respect to the stand 1 about the bolt 7.

As shown in fig. 2 to 3, a nut mounting groove 10 coaxial with the through hole 8 is further concavely formed at a side end of the rotation support member 2, and after the bolt 7 is connected, a nut 7a of the bolt 7 is inserted into the nut mounting groove 10, so that the structure is beautiful. A damping washer 11 is also arranged between the bolt 7 and the rotating cross rod 2a, and the damping washer 11 is arranged in the nut mounting groove 10 in advance before the bolt 7 is connected; after the bolt 7 is connected, the bolt 7 will pass through the damping washer 11, and the nut 7a will be in press fit with the damping washer 11, so that the damping washer 11 is pressed between the rotating crossbar 2a and the nut 7 a. Specifically, the method comprises the following steps: the damping gasket 11 is a rubber ring, so that the cost is low and a good damping effect can be provided; through the damping washer 11, when the acting rotary supporting piece 2 rotates relative to the support 1, good damping feeling is achieved, and after the adjustment is completed, the damping washer 11 can provide damping for the rotary cross rod 2a, so that the rotary supporting piece 2 can rotate and stay at any height adjustment position; the adjustment operation is very convenient, no additional locking structure is needed, and the structure is simplified and reliable.

As shown in fig. 1-7, a gear adjusting mechanism is further disposed between the rotating groove 5 and the rotating mating seat 6, and the gear adjusting mechanism includes a plastic gear adjusting piece 12 disposed in the rotating groove 5, and a positioning protrusion 13 correspondingly disposed at the front end of the rotating mating seat 6; specifically, the method comprises the following steps: the inner wall of the rotating groove 5 is an arc-shaped surface, and the front end of the rotating matching seat 6 is correspondingly arranged to be an arc-shaped surface; so that when the rotating support 2 rotates relative to the seat 1, the rotating fitting seat 6 and the rotating groove 5 can rotate relatively without interference. The gear adjusting sheet 12 is arc-shaped, and the gear adjusting sheet 12 is attached to the inner wall of the rotating groove 5 along the radial direction; two arc-shaped limiting bosses 14 which are spaced left and right are arranged at the middle position of the inner wall of the rotating groove 5, and a positioning groove 15 is formed between the two limiting bosses 14; two spaced limiting columns 16 are arranged in the positioning groove 15, and limiting holes 17 are correspondingly arranged at the corresponding positions of the gear adjusting sheets 12; then the gear adjusting sheet 12 is embedded in the positioning groove 15, and the limiting column 16 is clamped in the limiting hole 17; therefore, the gear adjusting sheet 12 can be stably attached to the inner wall of the rotating groove 5 and cannot be deviated up and down or left and right. Positioning clamping grooves 18 distributed at intervals are arranged on the adjusting gear piece 12 along the circumferential direction of the rotating cross rod 2a; the positioning notch 18 is configured to be capable of snap-fitting with the positioning projection 13. By adopting the connecting structure, after the connection is finished, the rotary matching seat 6 is embedded in the rotary groove 5, the connection is tight, and the connection trace can be hidden. In addition, decorative cover plates 19 extending forwards are respectively arranged at the upper end and the lower end of the support 1 positioned on the rotary matching seat 6. After the connection, the rotating cross rod 2a is positioned between the two decorative cover plates 19, and the decorative cover plates 19 can further shield the rotating groove 5 on the rotating cross rod 2a, so that after the rotating support piece 2 is matched with the support 1, the connecting structure is hidden between the two, and the structure is attractive.

Specifically, the method comprises the following steps: the support 1 is of a metal structure, and then the rotary matching seat 6 and the positioning bulge 13 are metal parts and have higher hardness. After the rotating matching seat 6 and the rotating cross rod 2a are assembled by the bolts 7, as shown in fig. 6, the positioning protrusion 13 is located in the rotating groove 5 and is clamped in one of the positioning clamping grooves 18, so that the rotation of the rotating support member 2 can be limited. The gear adjusting sheet 12 is made of a pom material and can generate plastic deformation to a certain degree; then when acting force is applied to the rotating support piece 2 to enable the rotating support piece 2 to rotate relative to the support 1, the gear adjusting sheet 12 and the positioning protrusions 13 are mutually extruded, the hardness of the positioning protrusions 13 is high, the gear adjusting sheet 12 can be extruded to generate plastic deformation, and the positioning protrusions 13 can move relative to the gear adjusting sheet 12 and can be clamped in positioning clamping grooves 18 at different positions. And because the positioning bulge 13 is made of metal, in the adjusting process, when the positioning bulge 13 is clamped into the positioning clamping grooves 18 at different positions, a crisp click sound is generated, and the gear feeling is very obvious in the adjusting process. Moreover, the pom material still has good wearability, makes gear position adjustment piece 12 be difficult for taking place wearing and tearing, improves life.

Then, as shown in fig. 1, 7 and 8, the headrest rotation adjusting apparatus of the present invention can adjust the height of the headrest 3 by rotating the rotation support member 2 with respect to the support 1; and in the process that the rotary supporting piece 2 rotates relative to the support 1, under the matching action of the positioning protrusions 13 and the positioning clamping grooves 18, a plurality of adjusting gears are arranged, and the gear feeling is obvious. After the adjustment is finished, firstly, the positioning bulge 13 is in clamping fit with the positioning clamping groove 18, so that the rotation of the rotating support piece 2 relative to the support 1 can be limited; secondly, the damping washer 11 can further provide damping to limit the rotation of the rotating support 2; so that the rotary support 2 can be stably stopped at an arbitrary adjustment height to support the headrest 3.

Claims

1. A headrest rotation adjustment device characterized by comprising:

a seat configured to be coupled to a seat back;

a rotary support configured to connect and support the headrest; the rotary supporting piece is arranged along the front-back direction, the front end of the rotary supporting piece is connected with the headrest, and the rear end of the rotary supporting piece is in rotary fit with the support; the rotating support part is provided with a rotating cross rod positioned at the rear part, and a rotating groove is arranged in the middle of the rotating cross rod; the support is correspondingly provided with a rotary matching seat protruding forwards; the rotary matching seat is embedded in the rotary groove, and the rotary cross rod is connected with the rotary matching seat through a bolt; the bolt penetrates through the rotating cross rod and the rotating matching seat along the left and right directions and serves as rotating shafts of the rotating cross rod and the rotating matching seat; a damping washer for providing damping is arranged between the bolt and the rotating cross rod;

the gear adjusting mechanism is arranged between the rotary matching seat and the rotary groove; the gear adjusting mechanism comprises a plastic gear adjusting sheet arranged in the rotating groove and a hard positioning bulge correspondingly arranged at the front end of the rotating matching seat; the gear adjusting sheet is arc-shaped, is pasted on the inner wall of the rotating groove, and is provided with positioning clamping grooves which are arranged at intervals and are used for being clamped and matched with the positioning protrusions.

2. The headrest rotation adjustment device according to claim 1, characterized in that: the support, the rotary matching seat and the positioning bulge are all made of metal materials.

3. The headrest rotation adjustment device according to claim 1, characterized in that: the gear adjusting sheet is made of a pom material.

4. The headrest rotation adjustment device according to claim 1, wherein: a bolt mounting groove is concavely arranged at the side end of the rotating cross rod, and the damping washer is arranged in the bolt mounting groove; and the nut of the bolt is embedded in the screw mounting groove and is in compression fit with the damping washer.

5. The headrest rotation adjustment device according to claim 1 or 4, characterized in that: the damping washer adopts a rubber ring.

6. The headrest rotation adjustment device according to claim 1, characterized in that: a through hole transversely penetrating through the rotating groove is formed in the side end of the rotating cross rod, and a connecting hole with internal threads is formed in the corresponding side end of the rotating matching seat; the bolt penetrates through the damping washer and the through hole in sequence and is connected in the connecting hole.

7. The headrest rotation adjustment device according to claim 1, characterized in that: the inner wall of the rotating groove is an arc-shaped surface; the front end of the rotary matching seat is correspondingly provided with an arc-shaped surface.

8. The headrest rotation adjustment device according to claim 1, characterized in that: two arc-shaped limiting bosses which are spaced left and right are arranged in the middle of the inner wall of the rotating groove; a positioning groove is formed between the two limiting bosses; at least two limiting columns are arranged in the positioning groove, and limiting holes are correspondingly formed in the gear adjusting sheet; the gear adjusting sheet is embedded in the positioning groove and the limiting column is clamped in the limiting hole.

9. The headrest rotation adjustment device according to claim 1, wherein: the rotary supporting piece also comprises connecting support rods which respectively extend forwards from two sides of the rotary cross rod; the two connecting struts are configured to connect with a headrest.

10. The headrest rotation adjustment device according to claim 1, wherein: and decorative cover plates extending forwards are respectively arranged at the upper end and the lower end of the support seat positioned on the rotary matching seat.