Chair back adjusting mechanism of training chair

Abstract

A chair back adjusting mechanism of a training chair comprises a chair seat and a chair back, the chair seat is provided with a back connecting part, a height adjusting assembly is jointly connected between the back connecting part and the chair back, and the height adjusting assembly comprises a lifting base fixed to the back connecting part, a lifting base fixed to the lifting base and a lifting sliding seat fixed to the chair back. The lifting sliding seat is in guide fit with the lifting base in a manner of moving up and down, a sliding seat groove is formed in the back of the lifting sliding seat, and a plurality of gear grooves arranged in the moving direction of the lifting sliding seat are formed in the sliding seat groove; the front end of the lifting base extends into the sliding seat groove, and a locking piece and an elastic piece used for driving the locking piece to be clamped into the gear groove are arranged on the lifting base. Under the action of the height adjusting assembly, the chair back can realize multi-gear height adjustment, so that the back supporting requirements of users with various body types are met, and the use comfort of the various users is ensured.

Description

Technical Field

[0001] This utility model relates to the field of chair technology, specifically to a backrest adjustment mechanism for a training chair. Background Technology

[0002] In modern education and training, corporate training, and conference seminars, training chairs, as basic seating facilities, have attracted much attention for their functionality, comfort, and structural stability.

[0003] The training chair disclosed in the technical solution of application number CN202320457401.4 includes a chair frame, a chair seat and a chair back. The chair seat is installed on the chair frame, and the chair back is directly fixed to the chair seat in a non-adjustable manner. Although this design is simple in structure and low in cost, the chair back height is fixed and cannot be adjusted according to the user's body shape, making it difficult to meet the back support needs of users of different body shapes. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a backrest adjustment mechanism for a training chair.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A backrest adjustment mechanism for a training chair includes a seat and a backrest. The backrest has a backrest connection portion at its rear end. The backrest connection portion and the backrest are connected together by a height adjustment component for adjusting the height of the backrest. The height adjustment component includes a lifting base fixedly connected to the backrest connection portion, a lifting base fixedly connected to the lifting base, and a lifting slide fixedly connected to the backrest. The lifting slide is guided and fitted onto the lifting base in a way that allows it to move up and down. The back of the lifting slide has a slide groove, and the slide groove has multiple position slots arranged along the moving direction of the lifting slide.

[0007] The front end of the lifting base extends into the slide groove. The lifting base is provided with a locking member movably connected to the lifting base and an elastic member for driving the locking member to engage in the gear slot. The two ends of the elastic member are respectively connected to the lifting base and the locking member.

[0008] In this utility model, the lifting base is provided with a locking movable groove and a locking opening. One end of the locking opening faces the gear slot, and the other end is connected to the locking movable groove. The locking member and the elastic member are both located in the locking movable groove. The locking movable groove is recessed and has a rotating groove at its lower end. The lower end of the locking member can move up and down and rotate and swing in the rotating groove. The locking member includes a locking protrusion with a corresponding locking opening. The elastic member uses elasticity to push the upper end of the locking member to make the locking protrusion rotate and swing towards the locking opening. When the locking protrusion is engaged in any gear slot, it forms a locking position.

[0009] In this utility model, the rotating groove is provided with a rotating guide part, and the locking member also includes a locking body. The lower end of the locking body is inserted into the rotating groove, and the locking body is provided with a rotating guide groove corresponding to the rotating guide part. The rotating guide part is inserted into the rotating guide groove. A locking movement vacancy is left between the rotating guide part and the rotating guide groove so that the locking member can move up and down and rotate relative to the lifting base.

[0010] In this utility model, the elastic element is a compression spring, the locking body is provided with an elastic positioning hole groove, the locking movable groove is provided with an elastic adaptation groove, and the two ends of the elastic element are respectively inserted into the elastic positioning hole groove and the elastic adaptation groove.

[0011] In this utility model, the locking movable groove is recessed and has an unlocking groove at its upper end. The locking component also includes an unlocking mating part connected to the upper end of the locking body and a linkage protrusion connected to the locking body and corresponding to the locking opening. The sliding seat groove is provided with a linkage groove, and the linkage protrusion is always inserted into the linkage groove. The linkage groove is provided with an upper locking reset linkage surface at its upper end, and an unlocking linkage inclined surface and a rising linkage surface at its lower end. The rising linkage surface is connected to the rear end of the unlocking linkage inclined surface.

[0012] In this utility model, the left and right sides of the lifting slide are provided with slide grooves extending from top to bottom, the lifting base is integrally formed with a guide seat, and the guide seat is integrally formed with a guide rail part that slides into the slide groove.

[0013] In this utility model, the back connecting part and the lifting base are fixed together by seat connecting bolts. The back of the lifting base is provided with a first positioning post. The back connecting part is provided with a first positioning groove corresponding to a plurality of first positioning posts. Each first positioning post is positioned and inserted into a first positioning groove.

[0014] In this utility model, a hidden mounting groove is provided on the back side of the back connecting part, and a seat connection through hole is provided in the hidden mounting groove, which runs from back to front through the first seat positioning post. The first seat positioning post is provided with a seat connection screw hole corresponding to the seat connection through hole. The screw of the seat connection bolt passes through the seat connection through hole and is threaded into the seat connection screw hole. The rear opening of the hidden mounting groove is covered by a decorative cover, and the decorative cover is installed on the back connecting part by a snap-fit ​​method.

[0015] In this utility model, the front end of the lifting base is provided with an installation slot, the rear end of the lifting base is inserted into the installation slot, the bottom groove surface of the installation slot supports the bottom of the lifting base, and the lifting base and the lifting base are fixedly connected by base bolts.

[0016] In this utility model, the chair back and the lifting slide are fixed together by back connecting bolts. The back of the chair back is provided with a plurality of back positioning posts. The front of the lifting slide is provided with back positioning grooves corresponding to the plurality of back positioning posts. Each back positioning post is positioned and inserted into a back positioning groove.

[0017] The beneficial effects of this utility model are as follows: A height adjustment component for adjusting the height of the chair back is connected between the backrest connection part of the seat and the chair back. Under the action of the height adjustment component, the chair back can be adjusted to multiple heights, thereby meeting the back support needs of users of various body types and ensuring the comfort of various users. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a perspective view of this embodiment;

[0020] Figure 2 An exploded view of the seat, backrest, and height adjustment assembly;

[0021] Figure 3 An exploded view of the seat and height adjustment assembly;

[0022] Figure 4 Explosion of height adjustment components Figure 1 ;

[0023] Figure 5 Explosion of height adjustment components Figure 2 ;

[0024] Figure 6 This is a schematic diagram of the internal structure of the height adjustment component. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0026] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0027] Furthermore, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection using welding, a detachable connection using bolts, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] Reference Figure 1-6A backrest adjustment mechanism for a training chair includes a seat 1 and a backrest 2. The rear end of the seat 1 is integrally formed with an upwardly extending backrest connection portion 11. The backrest 2 is located in front of the backrest connection portion 11. A height adjustment component for adjusting the height of the backrest 2 is connected between the backrest connection portion 11 and the backrest 2. The height adjustment component includes a lifting base 3 fixedly connected to the backrest connection portion 11, a lifting base 4 fixedly connected to the lifting base 3, and a lifting slide 5 fixedly connected to the backrest 2. The seat 5 is movably guided and fitted onto the lifting base 3. The back of the lifting slide 5 is provided with a slide groove 51, and the slide groove 51 is provided with a plurality of position slots 52 arranged along the moving direction of the lifting slide 5. Furthermore, the front end of the lifting base 4 extends into the slide groove 51. The lifting base 4 is provided with a locking member 6 movably connected to the lifting base 4 and an elastic member 7 for driving the locking member 6 to engage in the position slot 52. The two ends of the elastic member 7 are respectively connected to the lifting base 4 and the locking member 6.

[0030] In this embodiment, a height adjustment component for adjusting the height of the backrest 2 is connected between the backrest connection 11 of the seat 1 and the backrest 2. Under the action of the height adjustment component, the backrest 2 can be adjusted to multiple heights to meet the back support needs of users of various body types and ensure the comfort of various users.

[0031] In this embodiment, the lifting base 4 is provided with a locking movable groove 41 and a locking opening 42. One end of the locking opening 42 faces the gear slot 52, and the other end is connected to the locking movable groove 41. The locking member 6 and the elastic member 7 are both located in the locking movable groove 41. The locking movable groove 41 is recessed with a rotating groove 43 at its lower end. The lower end of the locking member 6 can move up and down and rotate and swing in the rotating groove 43. The locking member 6 includes a locking protrusion 61 with a corresponding locking opening 42. The elastic member 7 uses elasticity to push the upper end of the locking member 6 to make the locking protrusion 61 rotate and swing towards the locking opening 42. When the locking protrusion 61 is engaged with any gear slot 52, it forms a locking position, thereby limiting the position of the lifting slide 5 on the lifting base 3 and realizing the locking of the height position of the chair back 2.

[0032] In this embodiment, the rotating groove 43 is provided with a rotating guide part 44, and the locking member 6 also includes a locking body 62. The lower end of the locking body 62 is inserted into the rotating groove 43. The locking body 62 is provided with a rotating guide groove 63 corresponding to the rotating guide part 44. The rotating guide part 44 is inserted into the rotating guide groove 63. A locking movement vacancy is left between the rotating guide part 44 and the rotating guide groove 63 to allow the locking member 6 to move up and down and rotate relative to the lifting base 4. When the locking member 6 rotates, it rotates around the rotating guide part 44 as the rotation axis. Further, the elastic member 7 is a compression spring. The locking body 62 is provided with an elastic positioning hole groove 64, and the locking movable groove 41 is provided with an elastic fitting groove 45. The two ends of the elastic member 7 are respectively inserted into the elastic positioning hole groove 64 and the elastic fitting groove 45.

[0033] In this embodiment, the locking groove 41 is recessed and has an unlocking groove 46 at its upper end. The locking member 6 also includes an unlocking mating part 65 connected to the upper end of the locking body 62 and a linkage protrusion 66 connected to the locking body 62 and corresponding to the locking port 42. The sliding seat groove 51 is provided with a linkage groove 53. The linkage protrusion 66 is always inserted into the linkage groove 53. The linkage groove 53 is provided with a locking reset linkage surface 54 at its upper end, and an unlocking linkage inclined surface 55 and a rising linkage surface 56 at its lower end. The rising linkage surface 56 is connected to the rear end of the unlocking linkage inclined surface 55.

[0034] After the locking tooth 61 engages with the lowest position slot 52, the lifting slide 5 continues to move upward via the chair back. During this process, the unlocking linkage inclined surface 55 first pushes against the linkage protrusion 66, causing the linkage protrusion 66 to rotate in the direction of retracting the locking movable slot 41 around the rotation guide part 44, thus disengaging the locking tooth 61 from the lowest position slot 52. At this time, the elastic member 7 is compressed. Then, the rising linkage surface 56 pushes against the linkage protrusion 66, causing the locking member 6 to move upward relative to the lifting base 4 until the unlocking engagement part 65 is inserted into the unlocking slot 46, preventing the locking member 6 from rotating. Part 44 rotates in the direction of extending out of the locking movable groove 41 along the rotation axis, keeping the locking protrusion 61 in the state of being disengaged from the gear groove 52; then the lifting slide 5 is pushed down, and when the locking reset linkage surface 54 presses against the linkage protrusion 66, the locking member 6 is pushed down relative to the lifting base 4 until the unlocking engagement part 65 disengages from the unlocking groove 46. At this time, the elastic member 7 unfolds and drives the locking member 6 to rotate in the direction of extending out of the locking movable groove 41 along the rotation guide part 44, so that the locking protrusion 61 can be engaged in the highest gear groove 52, locking the position of the lifting slide 5 relative to the lifting base 3.

[0035] In this embodiment, the locking body 62, the locking tooth 61, the linkage protrusion 66 and the unlocking engagement part 65 are integrally formed, and the linkage protrusion 66 is connected to the top of the locking tooth 61.

[0036] In this embodiment, the lifting slide 5 is provided with slide grooves 57 extending from top to bottom on both the left and right sides. The lifting base 3 is integrally formed with a guide seat 31, and the guide seat 31 is integrally formed with a guide rail part 32 that slides into the slide groove 57, so that the lifting slide 5 can be guided and fitted on the lifting base 3 in a way that allows it to move up and down.

[0037] In this embodiment, the back connecting part 11 and the lifting base 3 are fixed together by seat connecting bolts. The back of the lifting base 3 is provided with a first positioning post 33 and a plurality of second positioning posts 34. The back connecting part 11 is provided with a first positioning groove 111 corresponding to the plurality of first positioning posts 33 and a second positioning groove 112 corresponding to the plurality of second positioning posts 34. Each first positioning post 33 is positioned and inserted into a first positioning groove 111, and each second positioning post 34 is positioned and inserted into a second positioning groove 112, thereby realizing the positioning between the back connecting part 11 and the lifting base 3.

[0038] Furthermore, there are at least two first positioning posts 33 arranged from top to bottom. The back of the back connecting part 11 is provided with a hidden mounting groove 113. The hidden mounting groove 113 is provided with a seat connection through hole 114 that runs from back to front through the first positioning post 33. The first positioning post 33 is provided with a seat connection screw hole corresponding to the seat connection through hole 114. The screw of the seat connection bolt passes through the seat connection through hole 114 and is threaded into the seat connection screw hole, thereby realizing the constraint and fixation between the back connecting part 11 and the lifting base 3.

[0039] In this embodiment, the rear opening of the hidden mounting groove 113 is covered by a decorative cover 8. The decorative cover 8 is installed on the back connecting part 11 using a snap-fit ​​method. For example, the hidden mounting groove 113 has a mounting buckle 1131, and the decorative cover 8 has a mounting buckle part 81 that snaps onto the mounting buckle 1131. The decorative cover 8 is used to improve aesthetics and also reduces the risk of the seat connecting bolt being damaged by foreign objects. In addition, the decorative cover 8 is provided with a decorative positioning post 82. The second positioning groove 112 is arranged from front to back, and each decorative positioning post 82 corresponds to one second positioning groove 112. The second positioning groove 112 is inserted into the rear end of the second positioning groove 112 from back to front, thereby further enhancing the installation stability of the decorative cover 8.

[0040] In this embodiment, the front end of the lifting base 3 is provided with an installation slot 35, and the rear end of the lifting base 4 is inserted into the installation slot 35. The bottom groove surface of the installation slot 35 supports the bottom of the lifting base 4. The lifting base 4 and the lifting base 3 are fixedly connected by base bolts. By inserting the lifting base 4 into the installation slot 35, the bottom groove surface of the installation slot 35 can provide certain support for the lifting base 4, reducing the shear stress acting on the base connecting bolts, thereby improving the installation stability.

[0041] In this embodiment, the chair back 2 and the lifting slide 5 are fixed together by back connecting bolts. The back of the chair back 2 has a protrusion with multiple back positioning posts 21. The front of the lifting slide 5 has back positioning grooves 58 corresponding to the multiple back positioning posts 21. Each back positioning post 21 is inserted into a back positioning groove 58, thereby achieving positioning between the chair back 2 and the lifting slide 5. Furthermore, the lifting slide 5 has a through-hole running from front to back, and the back positioning posts 21 have corresponding back connecting screw holes. The screw of the back connecting bolt passes through the through-hole and is threaded into the back connecting screw hole, thereby achieving constrained positioning between the chair back 2 and the lifting slide 5.

[0042] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. A backrest adjustment mechanism for a training chair, comprising a seat (1) and a backrest (2), wherein the rear end of the seat (1) is provided with a backrest connection portion (11), characterized in that: The back connection (11) and the backrest (2) are connected together by a height adjustment component for adjusting the height of the backrest (2). The height adjustment component includes a lifting base (3) fixedly connected to the back connection (11), a lifting base (4) fixedly connected to the lifting base (3), and a lifting slide (5) fixedly connected to the backrest (2). The lifting slide (5) is guided and fitted on the lifting base (3) in a way that can move up and down. The back of the lifting slide (5) is provided with a slide groove (51). The slide groove (51) is provided with a plurality of position slots (52) arranged along the moving direction of the lifting slide (5). The front end of the lifting base (4) extends into the slide groove (51). The lifting base (4) is provided with a locking member (6) movably connected to the lifting base (4) and an elastic member (7) for driving the locking member (6) to engage in the position slot (52). The two ends of the elastic member (7) are respectively connected to the lifting base (4) and the locking member (6).

2. The backrest adjustment mechanism of a training chair according to claim 1, characterized in that: The lifting base (4) is provided with a locking movable groove (41) and a locking port (42). One end of the locking port (42) faces the gear slot (52), and the other end is connected to the locking movable groove (41). The locking member (6) and the elastic member (7) are both located in the locking movable groove (41). The locking movable groove (41) is recessed and has a rotating groove (43) at its lower end. The lower end of the locking member (6) can move up and down and rotate and swing in the rotating groove (43). The locking member (6) includes a locking protrusion (61) with a corresponding locking port (42). The elastic member (7) uses elasticity to push the upper end of the locking member (6) to make the locking protrusion (61) rotate and swing towards the locking port (42). When the locking protrusion (61) is engaged in any gear slot (52), it forms a locking position.

3. The backrest adjustment mechanism of a training chair according to claim 2, characterized in that: The rotating groove (43) is provided with a rotating guide part (44), and the locking member (6) also includes a locking body (62). The lower end of the locking body (62) is inserted into the rotating groove (43). The locking body (62) is provided with a rotating guide groove (63) corresponding to the rotating guide part (44). The rotating guide part (44) is inserted into the rotating guide groove (63). There is a locking movement vacancy between the rotating guide part (44) and the rotating guide groove (63) for the locking member (6) to move up and down and rotate relative to the lifting base (4).

4. The backrest adjustment mechanism of a training chair according to claim 3, characterized in that: The elastic element (7) is a compression spring. The locking body (62) is provided with an elastic positioning hole groove (64). The locking movable groove (41) is provided with an elastic adaptation groove (45). The two ends of the elastic element (7) are respectively inserted into the elastic positioning hole groove (64) and the elastic adaptation groove (45).

5. The backrest adjustment mechanism of a training chair according to claim 3, characterized in that: The locking groove (41) is recessed and has an unlocking groove (46) at its upper end. The locking member (6) also includes an unlocking mating part (65) connected to the upper end of the locking body (62) and a linkage protrusion (66) connected to the locking body (62) and corresponding to the locking port (42). The sliding groove (51) is provided with a linkage groove (53). The linkage protrusion (66) is always inserted into the linkage groove (53). The linkage groove (53) is provided with a locking reset linkage surface (54) at its upper end, and an unlocking linkage inclined surface (55) and a rising linkage surface (56) at its lower end. The rising linkage surface (56) is connected to the rear end of the unlocking linkage inclined surface (55).

6. The backrest adjustment mechanism of a training chair according to claim 1, characterized in that: The lifting slide (5) has a slide groove (57) extending from top to bottom on both the left and right sides. The lifting base (3) is integrally formed with a guide seat (31). The guide seat (31) is integrally formed with a guide rail (32) that slides into the slide groove (57).

7. The backrest adjustment mechanism of a training chair according to claim 1, characterized in that: The back connecting part (11) and the lifting base (3) are fixed together by seat connecting bolts. The back of the lifting base (3) is provided with a first positioning post (33). The back connecting part (11) is provided with a first positioning groove (111) corresponding to a plurality of first positioning posts (33). Each first positioning post (33) is positioned and inserted into a first positioning groove (111).

8. The backrest adjustment mechanism of a training chair according to claim 7, characterized in that: The back of the back connection part (11) is provided with a hidden mounting groove (113). The hidden mounting groove (113) is provided with a seat connection through hole (114) that runs from back to front through the first seat positioning post (33). The first seat positioning post (33) is provided with a seat connection screw hole corresponding to the seat connection through hole (114). The screw of the seat connection bolt passes through the seat connection through hole (114) and is threaded into the seat connection screw hole. The rear opening of the hidden mounting groove (113) is covered by a decorative cover (8). The decorative cover (8) is installed on the back connection part (11) by a snap-fit ​​method.

9. The backrest adjustment mechanism of a training chair according to claim 1, characterized in that: The front end of the lifting base (3) is provided with an installation slot (35), the rear end of the lifting base (4) is inserted into the installation slot (35), the bottom groove of the installation slot (35) supports the bottom of the lifting base (4), and the lifting base (4) and the lifting base (3) are fixedly connected by base bolts.

10. The backrest adjustment mechanism of a training chair according to claim 1, characterized in that: The chair back (2) and the lifting slide (5) are fixed together by back connecting bolts. The back of the chair back (2) has a protrusion with multiple back positioning posts (21). The front of the lifting slide (5) has a back positioning groove (58) corresponding to the multiple back positioning posts (21). Each back positioning post (21) is positioned and inserted into a back positioning groove (58).

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