A foldable back office chair

Abstract

This utility model belongs to the field of office chair technology, specifically a foldable back office chair, including a seat plate; a hinge block is fixedly connected to the top of the seat plate, and a backrest is rotatably connected to the side wall of the hinge block; a connecting component is provided on the side wall of the seat plate; a bidirectional threaded rod is rotatably connected to the middle of the seat plate; a sliding strip is threadedly connected to the outer wall of the bidirectional threaded rod; the sliding strip is slidably connected to the middle of the seat plate; a through groove is provided at the bottom of the seat plate; a slider is fixedly connected to the bottom of the sliding strip; the outer wall of the slider is slidably connected to the middle of the through groove; a connecting plate is rotatably connected to the side wall at the bottom of the slider. Through the cooperation of the structures in the connecting component, the backrest can be folded over the seat plate, and the support frame can also be folded together with the seat plate. In this way, the entire office chair can be folded as a whole during transportation without disassembling the armrests, backrest, and support legs for separate packaging. When in use, the user can simply unfold it, improving practicality.

Description

Technical Field

[0001] This utility model belongs to the field of office chair technology, specifically a foldable back office chair. Background Technology

[0002] Office chairs are an indispensable facility in modern work and life. With technological advancements and diversified needs, the design of office chairs must not only meet the requirements of comfort and functionality, but also adapt to space utilization efficiency. In the current technology, in order to improve comfort, many office chairs are designed with adjustable backrests.

[0003] However, some foldable back office chairs have significant structural shortcomings: their backrests, armrests, and support legs are usually separate components. This separate design requires disassembly and repackaging during transportation, and users need to reassemble them before use. The process is cumbersome and greatly reduces the convenience of the product and the user experience. Therefore, a foldable back office chair is proposed to address the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology and solve at least one of the technical problems mentioned in the background art, this utility model proposes a foldable back office chair.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A foldable back office chair of this utility model includes a seat plate; a hinge block is fixedly connected to the top of the seat plate, and a backrest is rotatably connected to the side wall of the hinge block; a connecting assembly is provided on the side wall of the seat plate; a bidirectional threaded rod is rotatably connected to the middle of the seat plate; a sliding strip II is threadedly connected to the outer wall of the bidirectional threaded rod; the sliding strip II is slidably connected to the middle of the seat plate; a through groove II is provided at the bottom of the seat plate; a slider II is fixedly connected to the bottom of the slider II; the outer wall of the slider II is slidably connected to the middle of the through groove II; a connecting plate I is rotatably connected to the bottom side wall of the slider II; a fixing block is rotatably connected to the bottom side wall of the connecting plate I; a support frame is fixedly connected to the bottom of the fixing block; the connecting assembly includes a connecting plate; the connecting plate is rotatably connected to the side wall of the seat plate; a support plate is rotatably connected to the top side wall of the connecting plate; a cylindrical tube is fixedly connected to the side wall of the end of the support plate; an annular groove is provided on the side wall of the backrest; the outer wall of the cylindrical tube is rotatably connected to the inner wall of the annular groove.

[0006] Preferably, the connecting assembly further includes a rectangular strip, which is slidably connected to the inner wall of the end of the support plate. A gear is fixedly connected to the end of the rectangular strip. A toothed groove is provided on the backrest side wall. The gear is inserted into the middle of the toothed groove. A rectangular plate is fixedly connected to the other end of the rectangular strip. A handle is fixedly connected to the top of the rectangular plate.

[0007] Preferably, a Z-shaped plate is fixedly connected to the end of the rectangular plate, a second sliding groove is provided on the side wall of the backrest, a rectangular block is slidably connected to the middle of the second sliding groove, a sliding plate is fixedly connected to the side wall of the rectangular block, a top plate is slidably connected to the side wall of the backrest, the top plate contacts the side wall of the Z-shaped plate, a sliding column is fixedly connected to the side wall of the end of the top plate, a third through groove is provided on the side wall of the sliding plate, and the outer wall of the sliding column is slidably connected to the middle of the third through groove.

[0008] Preferably, multiple sets of fixing blocks are provided, and the multiple sets of fixing blocks are symmetrically arranged on the top of the support frame. The side walls of the multiple sets of fixing blocks are rotatably connected to connecting plates two. The top of the connecting plates two is rotatably connected to slider one. The bottom of the seat plate is provided with a through groove one on one side of the through groove two. The outer wall of slider one is slidably connected to the middle of the through groove one. The top of slider one is fixedly connected to sliding strip one. Sliding strip one is slidably connected to the middle of the seat plate. The middle of sliding strip one is threadedly connected to the outer wall of the bidirectional threaded rod and located on one side of sliding strip two.

[0009] Preferably, a spring is sleeved on the outer wall of the rectangular strip, one end of the spring is fixed to the side wall of the end of the support plate, and the other end of the spring is fixed to the side wall of the gear.

[0010] Preferably, the backrest sidewall has a slide groove first on one side of the slide groove second, and a movable block is fixed to the other side of the top plate end, and the movable block is slidably connected to the middle of the slide groove first.

[0011] Preferably, the through groove three is inclined.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model provides a foldable back office chair. Through the cooperation of the structure in the connecting components, the backrest can be folded over the seat, and the support frame can also be folded together with the seat. In this way, the entire office chair can be folded as a whole during transportation without disassembling the armrests, backrest and support legs for separate packaging. When the user uses it, he / she can simply unfold it, which improves its practicality.

[0014] 2. This utility model provides a foldable back office chair. The stability between the backrest and the seat can be ensured by setting multiple sets of connecting components. In addition, the cooperation between the sliding plate, top plate, through groove, sliding column, moving block and rectangular block can simultaneously release the restriction of the backrest by multiple sets of connecting components, making it quicker and more convenient to fold the backrest. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a perspective view of the overall device of this utility model;

[0017] Figure 2 This is a perspective view of the seat plate and backrest of this utility model;

[0018] Figure 3 This is a three-dimensional exploded view of the middle seat plate and support frame of this utility model;

[0019] Figure 4 This is a three-dimensional sectional view of the seat plate and backrest of this utility model.

[0020] Figure 5 This is a three-dimensional view of the sliding plate and the backrest in this utility model;

[0021] Figure 6 This utility model Figure 4 A magnified 3D view of region A.

[0022] Legend:

[0023] 1. Seat plate; 2. Backrest; 21. Slide groove one; 22. Slide groove two; 23. Annular groove; 24. Toothed groove; 3. Connecting plate; 31. Support plate; 32. Rectangular plate; 33. Handle; 34. Cylindrical tube; 35. Z-shaped plate; 36. Rectangular strip; 37. Spring; 38. Gear; 4. Support frame; 41. Connecting plate one; 42. Fixing block; 43. Connecting plate two; 44. Slider one; 45. Bidirectional threaded rod; 46. Through groove one; 47. Through groove two; 48. Slider two; 49. Sliding bar one; 410. Sliding bar two; 5. Hinge block; 6. Sliding plate; 61. Top plate; 62. Through groove three; 63. Sliding column; 64. Moving block; 65. Rectangular block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Specific implementation examples are given below.

[0026] Please see Figures 1-6This utility model provides a foldable back office chair, including a seat plate 1; a hinge block 5 is fixedly connected to the top of the seat plate 1, and a backrest 2 is rotatably connected to the side wall of the hinge block 5; a connecting assembly is provided on the side wall of the seat plate 1; a bidirectional threaded rod 45 is rotatably connected to the middle of the seat plate 1; a sliding strip 410 is threadedly connected to the outer wall of the bidirectional threaded rod 45; the sliding strip 410 is slidably connected to the middle of the seat plate 1; a through groove 47 is provided at the bottom of the seat plate 1; a slider 48 is fixedly connected to the bottom of the sliding strip 410; the outer wall of the slider 48 is slidably connected to the middle of the through groove 47; the slider 48... A connecting plate 41 is rotatably connected to the bottom side wall of the 8th seat plate 1. A fixing block 42 is rotatably connected to the bottom side wall of the connecting plate 41. A support frame 4 is fixedly connected to the bottom of the fixing block 42. The connecting assembly includes a connecting plate 3, which is rotatably connected to the side wall of the seat plate 1. A support plate 31 is rotatably connected to the top side wall of the connecting plate 3. A cylindrical tube 34 is fixedly connected to the side wall of the end of the support plate 31. An annular groove 23 is provided on the side wall of the backrest 2. The outer wall of the cylindrical tube 34 is rotatably connected to the inner wall of the annular groove 23. When the office chair needs to be transported during operation, the backrest 2 and the support frame 4 can be folded. To reduce its space occupation, the specific operation is as follows: simply release the limiting effect of the connecting component on the backrest 2, then push the support plate 31. One end of the support plate 31 will rotate with the connecting plate 3, causing the connecting plate 3 and the seat plate 1 to rotate. The other end of the support plate 31 will rotate with the backrest 2, causing the backrest 2 and the hinge block 5 to rotate. In this way, the angles of the connecting plate 3 and the backrest 2 will change until the backrest 2 and the seat plate 1 are folded together. At this time, the connecting plate 3 and the support plate 31 will also fold together. Then, the bidirectional threaded rod 45 can be rotated, and the threaded connection will be activated. The sliding bar 410 on its outer wall will drive the slider 48 to move. The slider 48 will rotate with the connecting plate 41, and the overall angle of the connecting plate 41 will change. Its bottom will also rotate with the fixing block 42 until the connecting plate 41 is in a horizontal state, thus completing the folding. In this way, the entire office chair will be folded and can be directly packed and transported. When the user uses it, simply release the limit of the connecting component, pull the backrest 2 to unfold it, and then rotate the bidirectional threaded rod 45 to unfold the entire office chair. This way, it can be used directly without the need for assembly, which improves its practicality.

[0027] Furthermore, such as Figure 2 and Figure 6As shown, the connecting assembly also includes a rectangular strip 36, which is slidably connected to the inner wall of the end of the support plate 31. A gear 38 is fixedly connected to the end of the rectangular strip 36. A toothed groove 24 is provided on the side wall of the backrest 2, and the gear 38 is inserted into the middle of the toothed groove 24. A rectangular plate 32 is fixedly connected to the other end of the rectangular strip 36, and a handle 33 is fixedly connected to the top of the rectangular plate 32. During operation, when it is necessary to release the limiting component from limiting the backrest 2, simply pull the handle 33. The handle 33 will drive the rectangular plate 32 to move, the rectangular plate 32 will drive the rectangular strip 36 to move, and the rectangular strip 36 will drive the gear 38 to move until the gear 38 is completely disengaged from the middle of the toothed groove 24. At this time, the backrest 2 or the support plate 31 can be pushed to adjust the angle of the backrest 2. After adjustment, release the handle 33 to reset the rectangular plate 32, the rectangular strip 36, and the gear 38. A set of limiting components is provided on both sides of the backrest 2 to ensure the stability of limiting the backrest 2.

[0028] Furthermore, such as Figure 2 and Figure 5 As shown, a Z-shaped plate 35 is fixedly connected to the end of the rectangular plate 32. A second sliding groove 22 is provided on the side wall of the backrest 2. A rectangular block 65 is slidably connected to the middle of the second sliding groove 22. A sliding plate 6 is fixedly connected to the side wall of the rectangular block 65. A top plate 61 is slidably connected to the side wall of the backrest 2. The top plate 61 contacts the side wall of the Z-shaped plate 35. A sliding column 63 is fixedly connected to the side wall of the end of the top plate 61. A third through groove 62 is provided on the side wall of the sliding plate 6. The outer wall of the sliding column 63 is slidably connected to the middle of the third through groove 62. During operation, when the backrest is folded... When the backrest 2 is in place, the sliding plate 6 can also be pushed. At this time, the sliding column 63 will slide in the middle of the through groove 3 62 and drive the top plate 61 to move along the slope of the through groove 3 62 until the top plate 61 contacts the Z-shaped plate 35. Continue to push the sliding plate 6 so that the top plate 61 pushes the Z-shaped plate 35 to move. The Z-shaped plate 35 will drive the rectangular plate 32, the rectangular bar 36 and the gear 38 to move synchronously. In this way, the multiple sets of connecting components can be released from the limit of the backrest 2 at the same time, so that the seat plate 1 and the backrest 2 can be folded quickly and conveniently, improving convenience.

[0029] Furthermore, such as Figures 3-5As shown, multiple sets of fixing blocks 42 are provided, and these sets of fixing blocks 42 are symmetrically arranged on the top of the support frame 4. Connecting plates 2 43 are rotatably connected to the side walls of the multiple sets of fixing blocks 42. A slider 1 44 is rotatably connected to the top of the connecting plates 2 43. A through groove 1 46 is formed on one side of the through groove 2 47 at the bottom of the base plate 1. The outer wall of the slider 1 44 is slidably connected to the middle of the through groove 1 46. A sliding strip 1 49 is fixedly connected to the top of the slider 1 44, and the sliding strip 1 49 is slidably connected to the middle of the base plate 1. The middle part of the sliding bar 49 is threaded to the outer wall of the bidirectional threaded rod 45 and is located on one side of the sliding bar 410. During operation, the connecting plate 43 is connected to the side wall of multiple sets of fixed blocks 42, so that the connecting plate 43 and the connecting plate 41 are symmetrically and cross each other, ensuring the stability of the support for the seat plate 1. The movement mode of the slider 44, the sliding bar 49, and the connecting plate 43 is the same as that of the slider 48, the sliding bar 410, and the connecting plate 41, but the direction of movement is opposite, ensuring the stability of the support for the seat plate 1.

[0030] Furthermore, such as Figure 6 As shown, a spring 37 is sleeved on the outer wall of the rectangular bar 36. One end of the spring 37 is fixed to the side wall of the end of the support plate 31, and the other end of the spring 37 is fixed to the side wall of the gear 38. During operation, the spring 37 has a certain elasticity. When the rectangular bar 36 and the gear 38 are moved by the rectangular plate 32, the gear 38 will squeeze the spring 37. When the rectangular plate 32 is released, the spring 37 will push the gear 38 to reset through its own elasticity, so that the gear 38 can quickly insert into the middle of the toothed groove 24.

[0031] Furthermore, such as Figure 5 As shown, the backrest 2 has a slide groove 21 on one side of the slide groove 22, and a moving block 64 is fixed to the other side of the top plate 61. The moving block 64 is slidably connected to the middle of the slide groove 21. During operation, the cooperation between the slide groove 21 and the moving block 64 ensures that the top plate 61 can move in a straight line stably, which improves its practicality.

[0032] Furthermore, such as Figure 2 and Figure 5 As shown, the through groove 62 is inclined. During operation, by setting the through groove 62 to an inclined state, when the sliding plate 6 is moved, the sliding column 63 can smoothly drive the top plate 61 to move according to its inclination.

[0033] Working principle: When transporting the office chair, the backrest 2 and support frame 4 can be folded up to reduce its space occupation. The specific operation is as follows: Simply pull the handle 33. The handle 33 will move the rectangular plate 32, which in turn will move the rectangular bar 36. The rectangular bar 36 will then move the gear 38 until the gear 38 is completely disengaged from the center of the toothed groove 24. Then, push the support plate 31. One end of the support plate 31 will rotate with the connecting plate 3, causing the connecting plate 3 and the seat plate 1 to rotate. The other end of the support plate 31 will rotate with the backrest 2, causing the backrest 2 and the hinge block 5 to rotate. This changes the angle between the connecting plate 3 and the backrest 2 until the backrest 2 and the seat plate 1 are folded together. At this point, the connecting plate 3 and the support plate 31 will also fold. Then, the bidirectional threaded rod 45 can be rotated. At this time, the sliding strip 410 threaded to its outer wall will drive the slider 48 to move. The slider 48 will rotate with the connecting plate 41, and the overall angle of the connecting plate 41 will change. Its bottom will also rotate with the fixing block 42 until the connecting plate 41 is in a horizontal state, and the folding is completed. In this way, the entire office chair will fold and can be directly packed and transported. When the user uses it, simply release the limit of the connecting component, pull the backrest 2 to unfold it, and then rotate the bidirectional threaded rod 45 to unfold the entire office chair. In this way, it can be used directly without the need for assembly, which improves practicality.

[0034] When folding the backrest 2, the sliding plate 6 can also be pushed. At this time, the sliding column 63 will slide in the middle of the through groove 3 62 and drive the top plate 61 to move along the slope of the through groove 3 62 until the top plate 61 contacts the Z-shaped plate 35. Continue to push the sliding plate 6 so that the top plate 61 pushes the Z-shaped plate 35 to move. The Z-shaped plate 35 will drive the rectangular plate 32, the rectangular bar 36 and the gear 38 to move synchronously. In this way, the multiple sets of connecting components can be released from the restriction of the backrest 2 at the same time, so that the seat plate 1 and the backrest 2 can be folded quickly and conveniently, improving convenience.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A folding-back office chair, comprising a seat (1); characterized in that: A hinge block (5) is fixedly connected to the top of the seat plate (1). A backrest (2) is rotatably connected to the side wall of the hinge block (5). A connecting assembly is provided on the side wall of the seat plate (1). A bidirectional threaded rod (45) is rotatably connected to the middle of the seat plate (1). A sliding bar (410) is threadedly connected to the outer wall of the bidirectional threaded rod (45). The sliding bar (410) is slidably connected to the middle of the seat plate (1). A through groove (47) is provided at the bottom of the seat plate (1). A slider (48) is fixedly connected to the bottom of the slider (410). The outer wall of the slider (48) is slidably connected to the middle of the through groove (47). The bottom sidewall of slider two (48) is rotatably connected to connecting plate one (41), the bottom sidewall of connecting plate one (41) is rotatably connected to fixing block (42), the bottom of fixing block (42) is fixedly connected to support frame (4), the connecting assembly includes connecting plate (3), the connecting plate (3) is rotatably connected to the sidewall of seat plate (1), the top sidewall of connecting plate (3) is rotatably connected to support plate (31), the sidewall of the end of support plate (31) is fixedly connected to cylindrical tube (34), the sidewall of backrest (2) is provided with an annular groove (23), the outer wall of cylindrical tube (34) is rotatably connected to the inner wall of annular groove (23).

2. The foldable back office chair according to claim 1, characterized in that: The connecting assembly also includes a rectangular strip (36), which is slidably connected to the inner wall of the end of the support plate (31). A gear (38) is fixed to the end of the rectangular strip (36). A toothed groove (24) is provided on the side wall of the backrest (2). The gear (38) is inserted into the middle of the toothed groove (24). A rectangular plate (32) is fixed to the other end of the rectangular strip (36). A handle (33) is fixed to the top of the rectangular plate (32).

3. A folding-back office chair according to claim 2, characterized in that: The rectangular plate (32) is fixedly connected to the end of a Z-shaped plate (35). The backrest (2) has a second sliding groove (22) on its side wall. A rectangular block (65) is slidably connected to the middle of the second sliding groove (22). A sliding plate (6) is fixedly connected to the side wall of the rectangular block (65). A top plate (61) is slidably connected to the side wall of the backrest (2). The top plate (61) contacts the side wall of the Z-shaped plate (35). A sliding column (63) is fixedly connected to the side wall of the end of the top plate (61). A through groove (62) is opened on the side wall of the sliding plate (6). The outer wall of the sliding column (63) is slidably connected to the middle of the through groove (62).

4. A folding-back office chair according to claim 1, characterized in that: Multiple sets of fixing blocks (42) are provided, and the multiple sets of fixing blocks (42) are symmetrically arranged on the top of the support frame (4). The side walls of the multiple sets of fixing blocks (42) are rotatably connected to connecting plates two (43). The top of the connecting plates two (43) is rotatably connected to slider one (44). The bottom of the seat plate (1) is provided with a through groove one (46) on one side of the through groove two (47). The outer wall of slider one (44) is slidably connected to the middle of the through groove one (46). The top of slider one (44) is fixedly connected to sliding strip one (49). Sliding strip one (49) is slidably connected to the middle of the seat plate (1). The middle of sliding strip one (49) is threadedly connected to the outer wall of the bidirectional threaded rod (45) and located on one side of sliding strip two (410).

5. A folding-back office chair according to claim 2, characterized in that: A spring (37) is sleeved on the outer wall of the rectangular strip (36). One end of the spring (37) is fixed to the side wall of the end of the support plate (31), and the other end of the spring (37) is fixed to the side wall of the gear (38).

6. A folding-back office chair according to claim 3, characterized in that: The backrest (2) has a slide groove (21) on one side of the slide groove (22), and a moving block (64) is fixed to the other side of the top plate (61). The moving block (64) is slidably connected to the middle of the slide groove (21).

7. A folding-back office chair according to claim 6, characterized in that: The through slot three (62) is inclined.

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