CN220236460U - Chair back lifting adjusting mechanism - Google Patents
Chair back lifting adjusting mechanism Download PDFInfo
- Publication number
- CN220236460U CN220236460U CN202320559670.1U CN202320559670U CN220236460U CN 220236460 U CN220236460 U CN 220236460U CN 202320559670 U CN202320559670 U CN 202320559670U CN 220236460 U CN220236460 U CN 220236460U
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- locking piece
- piece
- bracket
- groove
- limit opening
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- 230000000630 rising effect Effects 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
The utility model discloses a chair back lifting adjusting mechanism, which comprises a back supporting piece, a bracket and a gear adjusting structure; the gear adjusting structure comprises a locking piece arranged on the bracket and a vertical groove arranged on the sliding seat; the bracket is provided with a matching groove, and the locking piece is longitudinally arranged in the matching groove; the matching groove is positioned at the upper end and the lower end of the locking piece and is respectively provided with an upper limit opening and a lower limit opening; the bottom end of the locking piece is always positioned in the lower limit opening, and the locking piece can longitudinally move along the bracket so that the top end of the locking piece is clamped into or withdrawn from the upper limit opening; the elastic piece is perpendicular to the locking piece; the locking piece is provided with a return position in which the top end is clamped into the upper limit opening, and a deflection position in which the top end is withdrawn downwards from the lower limit opening and deflected towards the elastic force direction exerted by the elastic piece; the locking piece is provided with a clamping head, and one side of the vertical groove is provided with a longitudinally-spaced clamping inverted groove; the back support piece can be adjusted along the rising of the support and is acted on by the locking piece to deflect back and forth, so that the clamping heads are sequentially clamped in clamping inverted grooves at different positions.
Description
Technical Field
The utility model relates to the field of seats, in particular to a chair back lifting adjusting mechanism.
Background
The chair back is an important component for providing comfort in the sitting position of a human body, and is often configured to be adjustable in a lifting manner so as to adapt to the height of the upper body in the sitting position of different people in order to effectively provide wider adaptability. The existing lifting adjusting mechanism generally adopts a friction fit or clamping fit mode, so that the adjustment of the chair back forms gear adjustment. The two gear adjusting modes are usually started in the adjusting process by operating a knob or a control switch and other structures; the structure is inconvenient to operate, one hand is required to act on the control switch, and the other hand is required to act on the chair back to move upwards; and the parts of the adjusting structure are complicated, the assembly is troublesome, the service life is short, the long-term repeated adjusting function is difficult to maintain, and the stability is poor.
Disclosure of Invention
The utility model overcomes the defects in the prior art, and provides the chair back lifting adjusting mechanism which utilizes the back-and-forth deflection of the locking piece to enable the clamping inverted groove in the vertical groove of the clamping head of the locking piece to be matched, so that the back supporting piece can carry out multi-gear lifting adjustment; and the structure is quite simple.
The technical scheme of the utility model is realized as follows:
a chair back lifting adjustment mechanism comprising: a back support and a bracket; the back support piece is in sliding fit with the bracket; a sliding seat which is arranged on the bracket in a sliding way is arranged on the back support piece; the gear adjusting structure is arranged between the sliding seat and the bracket; the gear adjusting structure comprises a locking piece which is arranged on the bracket and can swing movably, and a longitudinal vertical groove which is correspondingly arranged on the sliding seat; the bracket is provided with a matching groove, and the locking piece is longitudinally arranged in the matching groove; the matching groove is positioned at the upper end and the lower end of the locking piece and is respectively provided with an upper limit opening and a lower limit opening; the bottom end of the locking piece is always positioned in the lower limit opening, and the locking piece can longitudinally move along the bracket so that the top end of the locking piece is clamped into or withdrawn from the upper limit opening; the elastic piece is perpendicular to the locking piece and is configured to act on the locking piece and enable the locking piece to always have a tendency of swinging; the locking piece is provided with a return position in which the top end is clamped into the upper limit opening, and a deflection position in which the top end is withdrawn downwards from the lower limit opening and deflected towards the elastic force direction exerted by the elastic piece; the upper part of the locking piece is provided with a clamping head clamped in the vertical groove, and one side of the vertical groove is provided with a clamping inverted groove longitudinally spaced; the back support piece can be adjusted along the lifting of the bracket under the deflection position of the locking piece and acts on the back and forth deflection of the locking piece to enable the clamping head to be sequentially clamped in clamping inverted grooves at different positions; the back support piece moves to the bottom of the vertical groove when the clamping head is positioned to enable the locking piece to be righted, and the back support piece moves upwards continuously to enable the clamping head to drive the locking piece to move upwards to enable the top end of the locking piece to be clamped into the upper limit opening, and the back support piece can move downwards along the support to reset.
Preferably, the top end of the locking piece is provided with an upper joint, and the bottom end of the locking piece is provided with a lower joint; and at the return position, the upper connector is clamped in the upper limit opening, and the lower connector is clamped in the lower limit opening.
Preferably, the bottom profile of the lower joint is arcuate and movable within the lower limit opening. The lower connector is not limited to be fixed in the lower limit opening, and the bottom outline of the lower connector is arc-shaped, so that the lower connector can rotate in the lower limit opening when the locking piece deflects.
Preferably, a limit protrusion is arranged on the side part of the locking piece; the limiting protrusion is configured to abut against the top end of the matching groove to limit the bottom end of the locking piece from being separated from the lower limiting opening. The lower joint is always positioned in the lower limit opening.
Preferably, the limit bulge is in a triangular structure with a vertex angle facing the outer side of the locking piece; the limiting bulge is provided with a lower limiting inclined wall, and the lower limiting inclined wall is propped against the bottom end of the matching groove at the deflection position. Which in turn enables the locking member to remain stable in the deflected position.
Preferably, the clamping inverted groove is clamped with the clamping head to limit the back support piece to move downwards; and when the back support piece moves upwards, the clamping inverted groove can guide the locking piece to return.
Preferably, the elastic piece is a spring which is transversely arranged, a transverse sinking groove is concavely arranged in the bracket, and the spring is arranged in the sinking groove; one end of the spring is propped against the bracket, and the other end of the spring is propped against the locking piece; in the return position, the spring is in a laterally compressed state. The locking piece always has a tendency of deflection under the action of the spring; and the spring can press the locking member to hold the locking member in the return position.
Preferably, a pressing block capable of pressing down the clamping head is arranged at the upper end of the vertical groove. The pressing block can act on the clamping head to enable the locking piece to move downwards, so that the locking piece enters the deflection position from the return position.
Preferably, one of the slide and the bracket is provided with a longitudinal guide groove, and the mirror images of the guide groove are arranged at two sides of the vertical groove; the other one of the sliding seat and the bracket is correspondingly provided with a guide post which is in sliding fit in the guide groove. So that the back support can stably slide along the bracket.
The design starting point, the idea and the beneficial effects of the utility model adopting the technical scheme are as follows:
according to the chair back lifting adjusting mechanism, the gear adjusting structure is arranged between the sliding seat and the support, the locking piece is arranged in the support, and the upper limit opening and the lower limit opening are ingeniously arranged, so that the locking piece has a correcting position and a deflection position; when the back connecting piece is adjusted in a lifting way, the locking piece swings back and forth to be clamped with clamping inverted grooves at different positions in the vertical groove, so that the gear adjustment of the back connecting piece is realized; and during adjustment, only the back connecting piece is required to be directly acted, and the locking piece can spontaneously follow the corresponding deflection of the back supporting piece to match the lifting movement of the back supporting piece, so that stepless adjustment is realized. In addition, structural design is very retrench, only sets up locking piece and spring in the support, and the locking piece need not with direct connection, utilizes spacing mouthful and spacing mouthful down to carry out spacingly to the locking piece, design benefit.
Drawings
FIG. 1 is a schematic view of the rear structure of a back support connected to a bracket in an embodiment of the present utility model;
FIG. 2 is a schematic perspective view of the rear end of the back support according to an embodiment of the present utility model;
FIG. 3 is a schematic perspective view of the locking member in the retracted position according to the embodiment of the present utility model;
FIG. 4 is a schematic perspective view of the chuck at the upper end of the vertical slot in an embodiment of the utility model;
FIG. 5 is a schematic perspective view of the locking member in a deflected position according to the embodiment of the present utility model;
FIG. 6 is a schematic perspective view of a chuck being snapped into a snap-fit groove in an embodiment of the utility model;
FIG. 7 is a view showing the structure of the chuck when it is positioned at the lower end of the vertical slot and is returned again in the embodiment of the present utility model;
fig. 8 is a schematic perspective view of a chuck propped against the bottom of a vertical groove in an embodiment of the utility model.
The reference numerals are as follows: a back support 1; a bracket 2; a slide 3; a locking member 4; a vertical groove 5; a chuck 6; a clamping inverted groove 7; a mating groove 8; an upper limit opening 9; a lower limit port 10; a lower joint 11; an upper joint 12; a limit projection 13; a lower limit inclined wall 1301; a spring 14; a guide groove 15; a guide post 16; and a briquette 17.
Description of the embodiments
In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.
In the description of the present utility model, the term "at least one" refers to 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 embodiments of the present utility model are as follows:
as shown in fig. 1 to 8, the present utility model provides a chair back lifting adjusting mechanism, which comprises a back support 1 and a bracket 2; at the lower end of the back support 1 there is a slide 3 projecting downwards, which slide 3 is slidingly arranged on the front side of the frame 2. And a gear adjusting structure is arranged between the sliding seat 3 and the bracket 2, and comprises a locking piece 4 which is arranged on the bracket 2 and can swing movably and a longitudinal vertical groove 5 correspondingly arranged on the sliding seat 3. The locking piece 4 is provided with a clamping head 6 clamped in the vertical groove 5, one side of the vertical groove 5 is provided with a clamping reverse groove 7 longitudinally spaced, and the clamping head 6 can be matched with the clamping reverse groove 7 in a clamping way; the multi-gear height adjustment of the back support 1 along the support 2 can be realized by utilizing the deflection of the locking piece 4 and the matching of the clamping head 6 and the clamping reverse groove 7.
Specifically: as shown in fig. 3 to 8, a fitting groove 8 is provided on the bracket 2, and the locking member 4 is longitudinally provided in the fitting groove 8; the upper and lower ends of the locking piece 4 at the matching groove 8 are respectively provided with an upper limit opening 9 and a lower limit opening 10; the bottom end of the locking piece 4 is provided with a lower joint 11, the lower joint 11 is located in the lower limit opening 10, the lower joint 11 is not limited to be fixed in the lower limit opening 10, the bottom profile of the lower joint 11 is arc-shaped, and the lower joint 11 can rotate in the lower limit opening 10. The top end of the locking piece 3 is provided with an upper connector 12, the upper connector 12 can be clamped into the upper limit opening 9, and the locking piece 3 can slide up and down in the matching groove 8, so that the upper connector 12 is clamped into the upper limit opening 9 upwards or withdrawn from the upper limit opening 9 downwards. But the lower joint 11 cannot be separated from the lower limit opening 10, further: a limiting bulge 13 protruding outwards is arranged on one side of the locking piece 4, and the limiting bulge 13 has a triangular structure with a vertex angle facing the outer side of the locking piece 4; when the locking piece 3 rises, the limiting protrusion 13 will abut against the top end of the matching groove 8 to limit the lower connector 11 from being separated from the lower limiting opening 10, and then the lower connector 11 is always limited in the lower limiting opening 10. An elastic piece perpendicular to the locking piece 4 is further arranged on the other side of the bracket 1, which is positioned on the locking piece 4, and is a spring 14 which is transversely arranged; the bracket 1 is concavely provided with a transverse sinking groove in which the spring 14 is embedded; one end of the spring 14 abuts against the bracket 2, and the other end of the spring 14 abuts against the locking member 4. The spring 14 acts on the locking piece 4 and enables the locking piece 4 to always have a tendency of deflection, and then the locking piece 4 has a return position and a deflection position, as shown in fig. 3, in the return position, the upper joint 12 is clamped in the upper limit opening 9, the lower joint 11 is clamped in the lower limit opening 10, and the locking piece 4 is in a longitudinal deflection position; and at this time the spring 14 is in a compressed state, and the spring 14 can then press the locking member 4 to hold the locking member 4 in the return position. As shown in fig. 5, when the upper connector 12 of the locking piece 4 is made to withdraw from the upper limit opening 9 downwards, the locking piece 4 will deflect towards one side under the action of the elasticity of the spring 14, and the lower connector 11 correspondingly moves in the lower limit opening 10; the limiting protrusion 13 has a lower limiting inclined wall 1301, and when the locking piece 4 swings to a certain angle, the lower limiting inclined wall 1301 abuts against the bottom end of the matching groove 8, so that the locking piece 4 is limited to swing further, and the locking piece 4 can stay at the swing position stably.
As shown in fig. 2 to 8, a vertical groove 5 is shown provided at the rear end of the slider 3, and the chuck 6 is provided at the upper portion of the locking member 4 with the chuck 6 protruding forward in the vertical groove 5. And the left side and the right side of the sliding seat 3, which are positioned on the vertical groove 5, are respectively provided with a longitudinal guide groove 15, and the support 2 is correspondingly provided with a guide pillar 16 positioned in the guide groove 15, so that the back support piece 1 can stably slide up and down along the support 2. The clamping inverted groove 7 is arranged at one side of the locking piece 4, which deflects; and a pressing block 17 capable of pressing down the clamping head 6 is arranged at the upper end of the vertical groove 5.
The back support 1 is specifically adjusted by: as shown in fig. 2-4, in the initial position, the locking member 4 is in the return position, when the back support member 1 needs to be adjusted upwards from the lowest position, the back support member 1 is firstly acted downwards, so that the pressing block 17 at the upper end of the vertical groove 5 acts on the clamping head 6 to move downwards, the upper joint 12 is withdrawn downwards from the upper limit opening 10, and the locking member 4 has a tendency to move to the deflection position; then the back support piece 1 can directly act upwards, as shown in fig. 5-6, and then the locking piece 4 can automatically swing to enable the clamping head 6 to be clamped in the clamping reverse groove 7; and after the clamping head 6 is clamped with the clamping inverted groove 7, the back support piece 1 is limited to move downwards, so that the back support piece 1 can stay at the adjusting height. The back support 1 is continuously acted on to move upwards, the locking piece 4 can swing back and forth, the clamping heads 6 are sequentially clamped in the clamping reverse grooves 7 with different heights, the back support 1 is provided with a plurality of adjusting gears, and the back support 1 is directly acted on, so that the operation is very simple.
As shown in fig. 7-8, when the back support 1 is lifted to the position that the clamping head 6 is positioned at the bottom end of the vertical groove 5, the locking piece 4 is aligned; then the back support piece 1 is further acted to lift to drive the locking piece 4 to move upwards so that the upper joint 12 is clamped into the upper limit opening 10 again; at this time, the lock member 4 is reset to the initial return position, and then the back support 1 can be moved down again to reset. The lifting adjustment operation of the back support 1 is very simple and convenient; the structure is quite simple, and only the locking piece 4 and the spring 14 are needed to be provided; the upper limit opening 9 and the lower limit opening 10 are skillfully arranged, so that the locking piece 4 has a return position and a deflection position, and the locking piece 4 can spontaneously follow the corresponding movement of the back support piece 1 to match the lifting adjustment of the back support piece 1; stepless regulation is realized.
The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.
Claims (9)
1. The utility model provides a back of chair lift adjustment mechanism which characterized in that includes:
a back support and a bracket; the back support piece is in sliding fit with the bracket; a sliding seat which is arranged on the bracket in a sliding way is arranged on the back support piece;
the gear adjusting structure is arranged between the sliding seat and the bracket; the gear adjusting structure comprises a locking piece which is arranged on the bracket and can swing movably, and a longitudinal vertical groove which is correspondingly arranged on the sliding seat; the bracket is provided with a matching groove, and the locking piece is longitudinally arranged in the matching groove; the matching groove is positioned at the upper end and the lower end of the locking piece and is respectively provided with an upper limit opening and a lower limit opening; the bottom end of the locking piece is always positioned in the lower limit opening, and the locking piece can longitudinally move along the bracket so that the top end of the locking piece is clamped into or withdrawn from the upper limit opening; the elastic piece is perpendicular to the locking piece and is configured to act on the locking piece and enable the locking piece to always have a tendency of swinging; the locking piece is provided with a return position in which the top end is clamped into the upper limit opening, and a deflection position in which the top end is withdrawn downwards from the lower limit opening and deflected towards the elastic force direction exerted by the elastic piece;
the upper part of the locking piece is provided with a clamping head clamped in the vertical groove, and one side of the vertical groove is provided with a clamping inverted groove longitudinally spaced; the back support piece can be adjusted along the lifting of the bracket under the deflection position of the locking piece and acts on the back and forth deflection of the locking piece to enable the clamping head to be sequentially clamped in clamping inverted grooves at different positions; the back support piece moves to the bottom of the vertical groove when the clamping head is positioned to enable the locking piece to be righted, and the back support piece moves upwards continuously to enable the clamping head to drive the locking piece to move upwards to enable the top end of the locking piece to be clamped into the upper limit opening, and the back support piece can move downwards along the support to reset.
2. The chair back lifting adjustment mechanism according to claim 1, wherein: the top end of the locking piece is provided with an upper joint, and the bottom end of the locking piece is provided with a lower joint; and at the return position, the upper connector is clamped in the upper limit opening, and the lower connector is clamped in the lower limit opening.
3. The chair back lifting adjustment mechanism according to claim 2, wherein: the bottom contour of the lower joint is arc-shaped and can move in the lower limit opening.
4. The chair back lifting adjustment mechanism according to claim 1, wherein: the side part of the locking piece is provided with a limiting bulge; the limiting protrusion is configured to abut against the top end of the matching groove to limit the bottom end of the locking piece from being separated from the lower limiting opening.
5. The chair back lifting adjustment mechanism according to claim 4, wherein: the limiting bulge is in a triangular structure with the apex angle facing the outer side of the locking piece; the limiting bulge is provided with a lower limiting inclined wall, and the lower limiting inclined wall is propped against the bottom end of the matching groove at the deflection position.
6. The chair back lifting adjustment mechanism according to claim 5, wherein: the clamping inverted groove is clamped with the clamping head to limit the back support piece to move downwards; and when the back support piece moves upwards, the clamping inverted groove can guide the locking piece to return.
7. The chair back lifting adjustment mechanism according to claim 1, wherein: the elastic piece is a spring which is transversely arranged, the bracket is concavely provided with a transverse sinking groove, and the spring is arranged in the sinking groove; one end of the spring is propped against the bracket, and the other end of the spring is propped against the locking piece; in the return position, the spring is in a laterally compressed state.
8. The chair back lifting adjustment mechanism according to claim 1, wherein: the upper end of the vertical groove is provided with a pressing block which can press down the clamping head, and then the pressing block can act on the clamping head to enable the locking piece to move downwards, so that the locking piece enters the deflection position from the return position.
9. The chair back lifting adjustment mechanism according to claim 1, wherein: one of the sliding seat and the bracket is provided with a longitudinal guide groove, and the guide groove is arranged at two sides of the vertical groove in a mirror image mode; the other one of the sliding seat and the bracket is correspondingly provided with a guide post which is in sliding fit in the guide groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320559670.1U CN220236460U (en) | 2023-03-17 | 2023-03-17 | Chair back lifting adjusting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320559670.1U CN220236460U (en) | 2023-03-17 | 2023-03-17 | Chair back lifting adjusting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220236460U true CN220236460U (en) | 2023-12-26 |
Family
ID=89271387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320559670.1U Active CN220236460U (en) | 2023-03-17 | 2023-03-17 | Chair back lifting adjusting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220236460U (en) |
-
2023
- 2023-03-17 CN CN202320559670.1U patent/CN220236460U/en active Active
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