Chair support

Abstract

The utility model relates to the technical field of seat supports, and discloses a chair support which comprises a supporting framework, a transverse plate is connected between the inner sides of the supporting framework, a seat frame is connected to the top end of the transverse plate, a front leg is connected to the bottom end of one side of the seat frame, an extension arm is connected to one side of the supporting framework, and the extension arm is connected to the other side of the supporting framework. A two-way threaded rod is rotatably arranged between the extension arms, moving blocks are connected to the two ends of the two-way threaded rod, connecting rods are rotatably arranged on one sides of the moving blocks, the same mounting head is rotatably arranged at the other ends of the connecting rods, and a waist support is rotatably arranged on one side of the mounting head. Through the connection of the rotating mechanism and the transmission mechanism, the rotation of the bidirectional threaded rod can be adjusted, so that the front-back movement of the waist support and the free rotation between the waist support and the mounting head are adjusted, the waist can be better attached to the waist support, the adjustment is convenient and rapid, the use requirements of different human bodies can be met, and the use comfort is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of seat brackets, in particular to a chair bracket. Background Art

[0002] Office chairs refer to various chairs equipped for the convenience of work in daily work and social activities. Office partners divide office chairs into narrow and broad sense. The narrow sense of office chairs refers to the backrest chairs that people sit on when doing desk work in a sitting position. The broad sense of office chairs refers to all chairs used in the office.

[0003] In most companies, office chairs do not have corresponding lumbar supports, so there is no support for the waist after sitting down. Some of the lumbar supports cannot be adjusted, so you need to pay close attention to your sitting posture to make the waist fit the lumbar support. Moreover, the chairs are all the same size, which makes it difficult for people of different body shapes to use them.

[0004] The above information disclosed in this background technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content

[0005] The purpose of the present invention is to provide a chair bracket to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: comprising a support structure, wherein a horizontal plate is connected between the inner sides of the support structure, a seat frame is connected to the top of the horizontal plate, a front leg is connected to the bottom end of one side of the seat frame, an extension arm is connected to one side of the support structure, a two-way threaded rod is rotatably provided between the extension arms, both ends of the two-way threaded rod are connected to moving blocks, one side of the moving blocks is rotatably provided with a connecting rod, the other end of the connecting rod is rotatably provided with the same mounting head, a waist support is rotatably provided on one side of the mounting head, and a transmission mechanism is connected to one side of the extension arm;

[0007] The transmission mechanism includes a shell fixedly arranged on one side of the extension arm, a rotating disk is rotatably arranged on one side of the shell, a circular shaft is connected to one side of the rotating disk, and one end of the circular shaft extends into the shell and is connected to a driving bevel gear, and a rotating shaft is rotatably arranged on the other side of the shell, and the two ends of the rotating shaft are respectively connected to a front bevel gear and a rear bevel gear.

[0008] Preferably, one end of the bidirectional threaded rod passes through the extension arm and is connected to a driven bevel gear, and one side of the rear bevel gear is engaged with the driven bevel gear.

[0009] Preferably, the front bevel gear is located inside the housing, and one side of the driving bevel gear is meshed with the front bevel gear.

[0010] Preferably, the support structure includes a support seat, a side is provided above the support seat, and a chair back is connected to the top end of the side.

[0011] Preferably, the support base is U-shaped, and a protective card is connected to the bottom end.

[0012] Preferably, a guide rod is connected between the extension arms, a through hole is opened on one side of the connecting rod, and the guide rod is slidably connected to the through hole.

[0013] In summary, this application has the following beneficial technical effects:

[0014] Through the rotation and connection of the transmission mechanism, the rotation of the two-way threaded rod can be adjusted, thereby adjusting the forward and backward movement of the lumbar support. The free rotation between the lumbar support and the mounting head can make the waist fit better with the lumbar support. The adjustment is convenient and quick, which can meet the use needs of different human bodies and improve the comfort of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a chair bracket of the present utility model;

[0016] Figure 2 This is a rear view structural diagram of a chair bracket of the present invention;

[0017] Figure 3 This is a schematic diagram of the side sectional structure of a chair bracket of the present utility model.

[0018] In the figure: 1. Support structure; 11. Support seat; 12. Side; 13. Chair back; 2. Cross board; 3. Seat frame; 4. Front leg; 5. Extension arm; 6. Bidirectional threaded rod; 61. Driven bevel gear; 7. Moving block; 8. Connecting rod; 81. Guide rod; 9. Mounting head; 10. Lumbar support; 14. Housing; 15. Rotating plate; 16. Driving bevel gear; 17. Rotating shaft; 18. Front bevel gear; 19. Rear bevel gear; 101. Protective card. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-3The utility model provides a technical solution: it includes a support structure 1, a horizontal plate 2 is connected between the inner sides of the support structure 1, a seat frame 3 is connected to the top of the horizontal plate 2, a front leg 4 is connected to the bottom end of one side of the seat frame 3, an extension arm 5 is connected to one side of the support structure 1, a two-way threaded rod 6 is rotatably provided between the extension arms 5, both ends of the two-way threaded rod 6 are connected to moving blocks 7, one side of the moving block 7 is rotatably provided with a connecting rod 8, the other end of the connecting rod 8 is rotatably provided with the same mounting head 9, a lumbar support 10 is rotatably provided on one side of the mounting head 9, wherein the rotation direction of the connecting rod 8 and the mounting head 9 is different from the rotation direction of the mounting head 9 and the lumbar support 10, and a transmission mechanism is connected to one side of the extension arm 5;

[0021] Reference Figure 2 As shown, the transmission mechanism includes a housing 14 fixedly provided on one side of the extension arm 5, a rotating disk 15 is rotatably provided on one side of the housing 14, a circular shaft is connected to one side of the rotating disk 15, and one end of the circular shaft extends into the housing 14 and is connected to a driving bevel gear 16, and a rotating shaft 17 is rotatably provided on the other side of the housing 14, and the two ends of the rotating shaft 17 are respectively connected to a front bevel gear 18 and a rear bevel gear 19;

[0022] Reference Figure 2 As shown, the front bevel gear 18 is located inside the housing 14, and one side of the active bevel gear 16 is engaged with the front bevel gear 18. Through the engagement between the active bevel gear 16 and the front bevel gear 18, one end of the bidirectional threaded rod 6 passes through the extension arm 5 and is connected to a driven bevel gear 61. One side of the rear bevel gear 19 is engaged with the driven bevel gear 61, so that the rear bevel gear 19 drives the driven bevel gear 61 to rotate, thereby driving the bidirectional threaded rod 6 to rotate. When the rotating disk 15 is rotated, 6 can be driven to rotate through the transmission mechanism, thereby adjusting the lumbar prolapse 10.

[0023] Reference Figure 1 As shown, the support structure 1 includes a support seat 11, a side 12 is provided above the support seat 11, and a chair back 13 is connected to the top of the side 12. It can be seen from the accompanying drawings that the support structure 1 is an integrally formed setting, which is convenient for later use and assembly.

[0024] Reference Figure 2 As shown, the support base 11 is U-shaped, and a protective card 101 is connected to the bottom end, which can protect the bottom surface of the support base 11 during use.

[0025] Reference Figure 2 and Figure 3 As shown, a guide rod 81 is connected between the extension arms 5, and a through hole is opened on one side of the connecting rod 8. The guide rod 81 is slidably connected to the through hole. When the connecting rod 8 rotates with the movement of the moving block 7, the guide rod 81 plays a supporting and guiding role, as well as a partial limiting role.

[0026] The implementation principle of the present application is as follows: when the utility model is in use, the seat cushion is placed in the seat frame 3 and connected to the cross plate 2, thereby completing the use of the chair, twisting the rotating disk 15 drives the active bevel gear 16 to rotate, thereby driving the rotating shaft 17 to rotate, and the rear bevel gear 19 will rotate synchronously while the rotating shaft 17 rotates, thereby driving the bidirectional threaded rod 6 to rotate through the driven bevel gear 61, so that the two moving blocks 7 move in opposite directions to facilitate pushing the connecting rod 8, and the lumbar support 10 is pushed to move through the mounting head 9. People can sit on the chair and make adjustments. By rotating the lumbar support 10 and the mounting head 9, the fit effect of the lumbar support 10 and the waist can be further guaranteed.

[0027] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chair support, comprising a support structure (1), characterized in that: A transverse plate (2) is connected between the inner sides of the support structure (1), a seat frame (3) is connected to the top of the transverse plate (2), a front leg (4) is connected to the bottom end of one side of the seat frame (3), an extension arm (5) is connected to one side of the support structure (1), a bidirectional threaded rod (6) is rotatably provided between the extension arms (5), a moving block (7) is connected to both ends of the bidirectional threaded rod (6), a connecting rod (8) is rotatably provided on one side of the moving block (7), the other end of the connecting rod (8) is rotatably provided with the same mounting head (9), a waist support (10) is rotatably provided on one side of the mounting head (9), and a transmission mechanism is connected to one side of the extension arm (5); The transmission mechanism comprises a housing (14) fixedly arranged on one side of the extension arm (5); a rotating disk (15) is rotatably arranged on one side of the housing (14); a circular shaft is connected to one side of the rotating disk (15); one end of the circular shaft extends into the housing (14) and is connected to a driving bevel gear (16); a rotating shaft (17) is rotatably arranged on the other side of the housing (14); and two ends of the rotating shaft (17) are respectively connected to a front bevel gear (18) and a rear bevel gear (19).

2. The chair bracket according to claim 1, characterized in that: One end of the bidirectional threaded rod (6) passes through the extension arm (5) and is connected to a driven bevel gear (61), and one side of the rear bevel gear (19) is meshed with the driven bevel gear (61).

3. The chair bracket according to claim 1, characterized in that: The front bevel gear (18) is located inside the housing (14), and one side of the driving bevel gear (16) is meshed with the front bevel gear (18).

4. The chair bracket according to claim 1, characterized in that: The support structure (1) comprises a support seat (11), a side edge (12) is provided above the support seat (11), and a chair back (13) is connected to the top end of the side edge (12).

5. The chair bracket according to claim 4, characterized in that: The support seat (11) is U-shaped, and a protective card (101) is connected to the bottom end.

6. The chair bracket according to claim 1, characterized in that: A guide rod (81) is connected between the extension arms (5), a through hole is provided on one side of the connecting rod (8), and the guide rod (81) is slidably connected to the through hole.

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