Swivel chair frame

Abstract

This utility model relates to the field of chair frames and discloses a swivel chair frame, including a backrest support and a U-shaped connecting frame. The backrest support is cross-shaped and rotatably connected to the inside of the U-shaped connecting frame. Both sides of the U-shaped connecting frame are provided with lifting grooves, and armrest lifting sliders are slidably connected within each lifting groove. A swivel chair armrest is fixedly connected to one side of each armrest lifting slider. A guide rail is fixedly connected within each lifting groove. The armrest lifting slider has a guide groove that mates with the guide rail. A fixed panel is fixedly connected within each guide groove. A rotating shaft is fixedly connected to one side of the fixed panel, and a lifting adjustment arm is rotatably connected to one side of the rotating shaft. An adjustment pin is fixedly connected to the end of the lifting adjustment arm away from the rotating shaft. A lifting slot that mates with the adjustment pin is provided on the guide rail. Compared with existing technologies, this utility model integrates backrest folding and multi-position armrest lifting functions, significantly improving the practicality and aesthetics of the swivel chair.

Description

Technical Field

[0001] This utility model relates to the field of chair frame technology, specifically to a swivel chair frame. Background Technology

[0002] There are two main common ways to connect the armrests to the frame of swivel chairs on the market. One method is to install the armrests directly onto the seat cushion, separate from the backrest. This structure results in a lack of seamless connection between the armrests and the backrest, creating a noticeable disconnect in appearance and affecting the overall aesthetics and harmony of the chair. The other method is to install the armrests onto the backrest, usually designed to flip upwards around the connection point. While this improves flexibility to some extent, most of these armrests lack height adjustment, making it difficult to accommodate the individual height needs of users of different heights and limiting their adaptability and comfort in actual use. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to overcome the above-mentioned technical difficulties and provide a swivel chair frame that integrates backrest folding and armrest multi-position lifting functions, which significantly improves the practicality and aesthetics of the swivel chair.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a swivel chair frame, including a backrest support and a U-shaped connecting frame. The backrest support is cross-shaped and rotatably connected to the inner side of the U-shaped connecting frame. A locking mechanism is provided between the U-shaped connecting frame and the backrest support. Lifting slides are provided on both sides of the U-shaped connecting frame. Armrest lifting sliders are slidably connected in each lifting slide. A swivel chair armrest is fixedly connected to one side of each armrest lifting slider. A guide rail is fixedly connected in each lifting slide. The armrest lifting slider has a guide groove that cooperates with the guide rail. A fixed panel is fixedly connected in each guide slide. A rotating shaft is fixedly connected to one side of the fixed panel. A lifting adjustment arm is rotatably connected to one side of the rotating shaft. An adjustment pin is fixedly connected to the end of the lifting adjustment arm away from the rotating shaft. A lifting slot that cooperates with the adjustment pin is provided on the guide rail. A U-shaped reset spring is provided on the fixed panel to cooperate with the lifting adjustment arm.

[0005] As an improvement, both ends of the chair back support are fixedly connected to fixed turntables, and the outer sides of the fixed turntables on both sides are provided with first arc-shaped limiting grooves arranged eccentrically. The fixed turntables on both sides are fixedly connected to first limiting sliders that are slidably connected in the corresponding first arc-shaped limiting grooves, so as to realize the ninety-degree swing between the U-shaped connecting frame and the chair back support.

[0006] As an improvement, the locking mechanism includes a locking slot located inside the U-shaped connecting frame, a fixed locking pin is slidably inserted into each locking slot, a fixed spring that cooperates with the fixed locking pin is fixedly connected into each locking slot, and a fixed locking hole that cooperates with the fixed locking pin is provided on the fixed turntable, and an unlocking button is slidably inserted into the fixed locking hole.

[0007] As an improvement, the guide rail has a T-shaped cross-section.

[0008] As an improvement, a C-shaped connecting block is rotatably connected to one side of the armrest lifting slider, and the swivel chair armrest is rotatably connected to the upper end of the C-shaped connecting block. A second limiting slider is fixedly connected to the end face of the armrest lifting slider near the C-shaped connecting block. A second arc-shaped limiting groove is provided at one end of the C-shaped connecting block to cooperate with the second limiting slider, so as to realize the 90-degree swing adjustment between the C-shaped connecting block and the armrest lifting slider. A third limiting slider is fixedly connected to the bottom surface of the swivel chair armrest, and a third arc-shaped limiting groove is provided at the end of the C-shaped connecting block near the swivel chair armrest to cooperate with the third limiting slider, so as to realize the 90-degree swing adjustment between the C-shaped connecting block and the swivel chair armrest.

[0009] As an improvement, the lifting slot includes a strip-shaped groove arranged along the height direction of the guide rail. A gear adjustment block is fixedly connected to the center of the strip-shaped groove. A plurality of gear slots arranged along the height direction are provided on one side of the gear adjustment block to cooperate with the adjustment pin. The gear slots are arranged at an angle. An annular moving channel communicating with the gear slots is provided between the gear adjustment block and the lifting slot. The adjustment pin can slide unidirectionally along the annular moving channel.

[0010] The advantages of this utility model compared with the prior art are as follows: the U-shaped connecting frame and the backrest support are connected by a rotating and locking mechanism, which enables flexible folding and stable locking of the backrest; the armrest adopts a structure that combines a lifting slider and a guide rail, combined with a lifting adjustment arm and a position slot, to achieve multi-position adjustment of the armrest height to meet the needs of different users; the C-shaped connecting block and the rotating connection between the armrest lifting slider and the swivel chair armrest further provide multi-angle adjustment function of the armrest, improving the comfort and flexibility of use. Attached Figure Description

[0011] Figure 1 This is an exploded view of a swivel chair frame according to this utility model.

[0012] Figure 2 This is a schematic diagram of a swivel chair frame structure according to the present invention.

[0013] Figure 3 This is a schematic diagram of the backrest support structure of a swivel chair frame according to the present invention.

[0014] Figure 4This is a schematic diagram of a U-shaped connecting frame structure for a swivel chair according to this utility model.

[0015] Figure 5 This is a schematic diagram of the lifting slider structure of the armrest of a swivel chair frame according to this utility model.

[0016] Figure 6 This is a schematic diagram of a C-shaped connecting block structure for a swivel chair frame according to this utility model.

[0017] Figure 7 This is a schematic diagram of a fixed panel structure for a swivel chair frame according to this utility model.

[0018] Figure 8 This is a schematic diagram of a guide rail structure for a swivel chair frame according to this utility model.

[0019] Figure 9 This is an enlarged view of section A of the frame of a swivel chair according to this utility model.

[0020] Figure 10 This is a diagram of the folding state of a swivel chair frame according to this utility model.

[0021] As shown in the figure: 1. Backrest support; 2. U-shaped connecting frame; 3. Fixed turntable; 4. First limiting slider; 5. First arc-shaped limiting groove; 6. Locking slot; 7. Fixed locking post; 8. Fixed spring; 9. Fixed lock hole; 10. Unlock button; 11. Lifting slide rail; 12. Armrest lifting slider; 13. C-shaped connecting block; 14. Swivel armrest; 15. Guide slide rail; 16. Guide slide rail; 17. Fixed panel; 18. Lifting adjustment swing arm; 19. Adjustment pin; 20. Second limiting slider; 21. Second arc-shaped limiting slide rail; 22. Third arc-shaped limiting slide rail; 23. Third limiting slider; 24. Rotating shaft; 25. Gear adjustment block; 26. Gear slot; 27. Circular moving channel; 28. U-shaped reset spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 10As shown, a swivel chair frame includes a backrest support 1 and a U-shaped connecting frame 2. The backrest support 1 is cross-shaped and rotatably connected to the inner side of the U-shaped connecting frame 2. A locking mechanism is provided between the U-shaped connecting frame 2 and the backrest support 1. Fixed turntables 3 are fixedly connected to both ends of the backrest support 1. First arc-shaped limiting grooves 5 are eccentrically arranged on the outer sides of the fixed turntables 3 on both sides. First limiting sliders 4 are fixedly connected to the fixed turntables 3 on both sides and slidably connected to the corresponding first arc-shaped limiting grooves 5, thereby realizing the connection between the U-shaped connecting frame 2 and the backrest support 1. The chair back support 1 can swing forward 90 degrees, allowing the chair back support 1 and the U-shaped connecting frame 2 to fold. The locking mechanism includes a locking slot 6 located inside the U-shaped connecting frame 2. Each locking slot 6 has a fixed locking pin 7 slidably inserted into it. The fixed locking pin 7 is made of galvanized iron. A fixed spring 8 that cooperates with the fixed locking pin 7 is fixedly connected inside the locking slot 6. The fixed turntable 3 has a through fixed locking hole 9 that cooperates with the fixed locking pin 7. An unlocking button 10 is slidably inserted into the fixed locking hole 9.

[0024] Both sides of the U-shaped connecting frame 2 are provided with lifting slide grooves 11, and armrest lifting sliders 12 are slidably connected in each lifting slide groove 11. A swivel chair armrest 14 is fixedly connected to one side of each armrest lifting slider 12. A guide rail 15 is fixedly connected in each lifting slide groove 11. The armrest lifting slider 12 is provided with a guide groove 16 that mates with the guide rail 15. The guide rail 15 has a T-shaped cross-section. A fixed panel 17 is fixedly connected in each guide groove 16. A rotating shaft 24 is fixedly connected to one side of the fixed panel 17. A lifting adjustment arm 18 is rotatably connected to one side of the rotating shaft 24. An adjustment top is fixedly connected to the end of the lifting adjustment arm 18 away from the rotating shaft 24. The guide rail 15 is provided with a lifting slot that cooperates with the adjusting pin 19. The fixed panel 17 is provided with a lifting adjustment arm 18 that cooperates with a U-shaped reset spring 28. The lifting slot includes a strip-shaped groove arranged along the height direction of the guide rail 15. A gear adjustment block 25 is fixedly connected to the center of the strip-shaped groove. On one side of the gear adjustment block 25, there are multiple gear slots 26 arranged along the height direction that cooperate with the adjusting pin 19. The gear slots 26 are arranged at an angle. An annular moving channel 27 communicating with the gear slot is provided between the gear adjustment block 25 and the lifting slot. The adjusting pin 19 can slide unidirectionally along the annular moving channel 27.

[0025] A C-shaped connecting block 13 is rotatably connected to one side of the armrest lifting slider 12. The swivel chair armrest 14 is rotatably connected to the upper end of the C-shaped connecting block 13. A second limiting slider 20 is fixedly connected to the end face of the armrest lifting slider 12 near the C-shaped connecting block 13. One end of the C-shaped connecting block 13 is provided with a second arc-shaped limiting groove 21 that cooperates with the second limiting slider 20, so as to realize the 90-degree swing adjustment between the C-shaped connecting block 13 and the armrest lifting slider 12. A third limiting slider 23 is fixedly connected to the bottom surface of the swivel chair armrest 14. A third arc-shaped limiting groove 22 that cooperates with the third limiting slider 23 is provided at the end of the C-shaped connecting block 13 near the swivel chair armrest 14, so as to realize the 90-degree swing adjustment between the C-shaped connecting block 13 and the swivel chair armrest 14. The C-shaped connecting block 13 can realize the up-and-down swing and left-and-right swing adjustment of the swivel chair armrest 14.

[0026] In practical use: (1) The principle of the handrail lifting mechanism: When the armrest height needs to be adjusted, pull the swivel chair armrest 14 upwards, causing the armrest lifting slider 12 to slide upwards along the guide rail 15. The armrest lifting slider 12 causes the fixed panel 17 and its lifting adjustment arm 18 to rise synchronously. The adjustment pin 19 at one end of the lifting adjustment arm 18 moves within the lifting slot. When the swivel chair armrest 14 is in its lowest position, the adjustment pin 19 is located at the lowest end of the annular moving channel 27, i.e., the first position. The position adjustment block has three position slots 26 along the height direction, corresponding to the second, third, and fourth positions, respectively.

[0027] When the handrail lifting slider 12 is pulled upward, the adjusting pin 19 slides clockwise upward along the annular moving channel 27. During this process, the lifting adjusting arm 18 swings under the limiting effect of the annular moving channel 27, causing the U-shaped reset spring 28 to undergo tensile deformation. When the adjusting pin 19 slides to the second position slot 26, the restoring elasticity of the U-shaped reset spring 28 pushes the lifting adjusting arm 18 to swing in the opposite direction, causing the adjusting pin 19 to engage in the second position slot 26, completing the adjustment of the second position. When adjusting from the second position to the third position, the handrail lifting slider 12 is pulled upward again. Since each position slot 26 is arranged at an angle, the adjusting pin 19 can slide upward from the second position slot 26 along the inclined surface and enter the third position slot 26 through the annular moving channel 27.

[0028] When it is necessary to lower the armrest height, the adjusting pin 19 should be adjusted to the uppermost end of the annular moving channel 27, that is, above the fourth position slot 26, so that the adjusting pin 19 slides clockwise along the annular moving channel 27 to return to the initial first position, and then the height can be adjusted upwards again.

[0029] (2) The principle of chair back folding: When the chair back support 1 needs to be folded, press the unlock button 10 to slide it inward along the locking hole 9. The unlock button 10 pushes the locking pin 7 into the locking slot 6, compressing the locking spring 8. After the locking pin 7 exits from the locking hole 9, the chair back support 1 can be swung. At this time, the first limiting slider 4 slides along the first arc-shaped limiting groove 5, causing the chair back support 1 to swing forward 90 degrees. Under the limiting action of the first arc-shaped limiting groove 5 and the first limiting slider 4, the rotation range of the chair back support 1 is limited to within 90 degrees. When the chair back support 1 needs to be restored to its original position, push the chair back support 1 in the opposite direction to return it to its original position. When the locking slot 6 coincides with the locking hole 9, the restoring force of the locking spring 8 pushes the locking pin 7 into the locking hole 9, achieving automatic locking.

[0030] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A swivel chair frame, comprising a backrest support (1) and a U-shaped connecting frame (2), characterized in that: The chair back support (1) is cross-shaped and rotatably connected to the inside of the U-shaped connecting frame (2). A locking mechanism is provided between the U-shaped connecting frame (2) and the chair back support (1). The U-shaped connecting frame (2) is provided with lifting slide grooves (11) on both sides. The lifting slide grooves (11) are slidably connected with armrest lifting sliders (12). The armrest lifting sliders (12) are fixedly connected to one side of the swivel chair armrests (14). The lifting slide grooves (11) are fixedly connected with guide rails (15). The armrest lifting sliders (12) are provided with guide slide grooves (16) that cooperate with the guide rails (15). The guide slide grooves (16) are fixedly connected with fixed panels (17). The fixed panels (17) are fixedly connected with a rotating shaft (24) on one side. The rotating shaft (24) is rotatably connected with a lifting adjustment arm (18) on one side. The lifting adjustment arm (18) is fixedly connected with an adjustment pin (19) at the end away from the rotating shaft (24). The guide rails (15) are provided with lifting slots that cooperate with the adjustment pins (19). The fixed panels (17) are provided with U-shaped reset springs (28) that cooperate with the lifting adjustment arm (18).

2. The swivel chair frame according to claim 1, characterized in that: The backrest support (1) is fixedly connected to a fixed turntable (3) at both ends. The outer sides of the fixed turntables (3) on both sides are provided with an eccentrically arranged first arc-shaped limiting groove (5). The fixed turntables (3) on both sides are fixedly connected to a first limiting slider (4) that is slidably connected in the corresponding first arc-shaped limiting groove (5), so as to realize the ninety-degree swing between the U-shaped connecting frame (2) and the backrest support (1).

3. A swivel chair frame according to claim 2, characterized in that: The locking mechanism includes a locking slot (6) located inside the U-shaped connecting frame (2). A fixed locking pin (7) is slidably inserted into each locking slot (6). A fixed spring (8) that cooperates with the fixed locking pin (7) is fixedly connected into the locking slot (6). A fixed locking hole (9) that cooperates with the fixed locking pin (7) is provided on the fixed turntable (3). An unlocking button (10) is slidably inserted into the fixed locking hole (9).

4. A swivel chair frame according to claim 1, characterized in that: The guide rail (15) has a T-shaped cross section.

5. A swivel chair frame according to claim 1, characterized in that: A C-shaped connecting block (13) is rotatably connected to one side of the armrest lifting slider (12). The swivel chair armrest (14) is rotatably connected to the upper end of the C-shaped connecting block (13). A second limiting slider (20) is fixedly connected to the end face of the armrest lifting slider (12) near the C-shaped connecting block (13). A second arc-shaped limiting groove (21) that cooperates with the second limiting slider (20) is provided at one end of the C-shaped connecting block (13) to realize the 90-degree swing adjustment between the C-shaped connecting block (13) and the armrest lifting slider (12). A third limiting slider (23) is fixedly connected to the bottom surface of the swivel chair armrest (14). A third arc-shaped limiting groove (22) that cooperates with the third limiting slider (23) is provided at one end of the C-shaped connecting block (13) near the swivel chair armrest (14) to realize the 90-degree swing adjustment between the C-shaped connecting block (13) and the swivel chair armrest (14).

6. A swivel chair frame according to claim 1, characterized in that: The lifting slot includes a strip-shaped slot arranged along the height direction of the guide rail (15). A gear adjustment block (25) is fixedly connected to the center of the strip-shaped slot. A plurality of gear slots (26) arranged along the height direction are provided on one side of the gear adjustment block (25) to cooperate with the adjustment pin (19). The gear slots (26) are arranged at an angle. An annular moving channel (27) communicating with the gear slots (26) is provided between the gear adjustment block (25) and the lifting slot. The adjustment pin (19) can slide unidirectionally along the annular moving channel (27).

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