Follow-up waist rest adjusting structure

Abstract

A follow-up waist rest adjusting structure comprises a fixed support, an elastic connecting piece and a movable support, a guide structure for guiding the movable support to move up and down is arranged on the fixed support, the movable support is matched with the guide structure of the fixed support in a guiding mode, and the two ends of the elastic connecting piece are connected with the fixed support and the movable support respectively. An adjusting support used for being connected with the waist leaning frame is arranged on the movable support in a guiding fit mode, the adjusting support is arranged on the movable support in a front-back moving fit mode, and the relative position between the adjusting support and the movable support is locked through a position locking structure. The adjusting support capable of moving back and forth to adjust the position is arranged on the movable support, so that the position of the waist rest frame relative to the movable support can be adjusted in multiple gears according to user requirements, and the waist rest can adapt to waist curves of different users as much as possible; meanwhile, different requirements of users on waist supporting strength and positions due to body type differences, using habits or scene requirements are met.

Description

Technical Field

[0001] This utility model relates to the field of chair technology, specifically to a follow-up lumbar support adjustment structure. Background Technology

[0002] A lumbar support in a chair can reduce pressure on the muscles and ligaments in the lower back, thus preventing and relieving lower back pain. Therefore, most office chairs are equipped with lumbar supports.

[0003] A chair lumbar support structure disclosed in application CN202421664860.0 includes: a fixed bracket connected to a seat back support, the fixed bracket having a vertical groove; a movable bracket including a movable connector and a lumbar support frame mounted on the movable connector, the movable connector being slidably connected to the groove; and an elastic connector, the first end of the elastic connector's axis being connected to the fixed bracket, and the second end of the elastic connector's axis being connected to the movable connector. The above technical solution, by providing a movable bracket and an elastic connector, and connecting the elastic connector to both the fixed bracket and the movable connector of the movable bracket, allows the chair lumbar support structure to adaptively adjust to the user's lumbar curve when the user uses it.

[0004] However, in this technical solution, since the lumbar support frame and the movable connector are fixedly connected, their relative positions lack an adjustable structure. When users have different requirements for the lumbar support strength and position in the seat depth direction due to differences in body shape, usage habits, or scenario needs, the above structure cannot change the position of the lumbar support frame in the seat depth direction, and cannot meet the user's needs as much as possible, resulting in certain limitations in seat comfort and versatility. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a follow-up lumbar support adjustment structure.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A follow-up lumbar support adjustment structure includes a fixed bracket, an elastic connector, and a movable bracket. The fixed bracket is provided with a guide structure for guiding the movable bracket to move up and down. The movable bracket is guided and fitted on the guide structure of the fixed bracket. The two ends of the elastic connector are respectively connected to the fixed bracket and the movable bracket. The movable bracket is guided and fitted with an adjustment bracket for connecting the lumbar support frame. The adjustment bracket is movable back and forth and fitted on the movable bracket. The relative positions of the adjustment bracket and the movable bracket are locked by a position locking structure.

[0008] In this utility model, the movable bracket is provided with an adjustment and telescopic groove, and at least part of the adjustment bracket is slidably guided within the adjustment and telescopic groove.

[0009] In this utility model, the adjusting bracket is provided with an adjusting groove, and the adjusting groove is provided with at least one gear array. The gear array includes multiple gear slots arranged in a straight line. The position locking structure includes a locking base, a locking member, and an elastic member. The locking base is located in the adjusting groove and is fixedly connected to the movable bracket. The locking base is provided with a locking guide groove. At least part of the locking member is slidably guided and engaged in the locking guide groove. The elastic member is installed in the locking guide groove and uses elasticity to push the locking member to move towards the gear slot. When the locking member engages with any gear slot, it forms a snap-fit ​​limit.

[0010] In this utility model, the locking component includes a locking body, locking teeth connected to the locking body, unlocking linkage part and unlocking retaining part. The locking body is guided and fitted in the locking guide groove. The locking guide groove is connected to a guide groove extension port that penetrates the locking base along the extension and retraction direction of the locking component. The locking teeth and unlocking linkage part can extend out of the locking guide groove from the guide groove extension port.

[0011] In this utility model, the position locking structure further includes a self-locking component for keeping the locking component disengaged from the gear slot when it engages with the locking component. The adjusting groove is provided with an unlocking drive slope for driving the unlocking linkage to make the locking component engage with the self-locking component, a first self-locking drive surface for driving the self-locking component to move forward relative to the locking base, and a second self-locking drive surface for driving the self-locking component to move backward relative to the locking base.

[0012] In this utility model, the self-locking component includes a self-locking drive part and a self-locking constraint part connected to the self-locking drive part. When the unlocking holding part of the locking component is hooked onto the self-locking constraint part, the locking component cannot move in the direction of the guide groove extension opening.

[0013] In this invention, the movable bracket is provided with a sliding groove, and the fixed bracket has a fixed guide rail extending into the sliding groove; the guiding structure includes a first movable guide surface located outside the fixed guide rail, and a guide roller that rolls on the first movable guide surface is rotatably mounted on the movable bracket.

[0014] In this utility model, the fixed guide rail has a guide rail protrusion located in the receiving mounting groove on the side facing away from the first moving guide surface, and the guide structure includes a second moving guide surface on the back of the guide rail protrusion.

[0015] In this utility model, the fixed bracket is provided with a receiving and mounting groove, the receiving and mounting groove is connected to a movable clearance opening located on the fixed bracket, the rear end of the movable bracket extends into the receiving and mounting groove through the movable clearance opening, the movable bracket is provided with a sliding connection part extending into the receiving and mounting groove, the fixed bracket is provided with a fixed connection part located in the receiving and mounting groove, and the two ends of the elastic connector are respectively connected and mounted on the sliding connection part and the fixed connection part.

[0016] In this utility model, a fixed cover plate is installed on the fixed bracket, and the fixed cover plate closes the rear opening of the moving clearance opening; the fixed cover plate is provided with a cover plate extension, and the cover plate extension closes the end opening of the U-shaped moving clearance opening.

[0017] The beneficial effects of this utility model are as follows: By setting an adjustable bracket that can move back and forth on the movable bracket, the position of the lumbar support relative to the movable bracket can be adjusted in multiple positions according to the user's needs, so that the lumbar support can adapt to the lumbar curve of different users as much as possible. This effectively solves the problem that the traditional fixed connection structure cannot change the position of the lumbar support in the seat depth direction, and meets the different requirements of users for lumbar support strength and position due to differences in body shape, usage habits or scenario needs, thereby improving the comfort of the chair when using it. Attached Figure Description

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

[0019] Figure 1 A 3D view of the adjustable lumbar support structure;

[0020] Figure 2 A schematic diagram showing the cover plate after it has been separated from the mounting bracket;

[0021] Figure 3 This is a schematic diagram of the guide roller installation.

[0022] Figure 4 The explosion was caused by some parts of the adjustable lumbar support structure. Figure 1 ;

[0023] Figure 5 The explosion was caused by some parts of the adjustable lumbar support structure. Figure 2 ;

[0024] Figure 6 The explosion was caused by some parts of the adjustable lumbar support structure. Figure 3 ;

[0025] Figure 7 This is a schematic diagram showing the locking element overlapping the self-locking element.

[0026] Figure 8This is a schematic diagram showing the locking element and the self-locking element when they are separated. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Reference Figure 1-8A follow-up lumbar support adjustment structure includes a fixed bracket 1, an elastic connector 2, and a movable bracket 3. The fixed bracket 1 can be integrally formed and connected to the backrest support, or it can have a connecting through hole for mounting connecting bolts, thus fixing the fixed bracket 1 to the backrest support. Further, the fixed bracket 1 has a guide structure for guiding the movable bracket 3 to move up and down. The movable bracket 3 is guided and fitted onto the guide structure of the fixed bracket 1. The two ends of the elastic connector 2 are respectively connected to the fixed bracket 1 and the movable bracket 3. Still further, the movable bracket 3 has a guide-fitting adjustment bracket 4 for connecting the lumbar support frame. The adjustment bracket 4 is movable and fitted onto the movable bracket 3. The relative positions of the adjustment bracket 4 and the movable bracket 3 are locked by a position locking structure. The adjustment bracket 4 has a lumbar support connecting hole 41 for connecting the lumbar support frame, thereby accommodating lumbar support bolts to connect the lumbar support frame.

[0032] This embodiment sets an adjustable bracket 4 on the movable bracket 3, which can be moved back and forth to adjust its position. This allows the position of the lumbar support relative to the movable bracket 3 to be adjusted in multiple positions according to the user's needs. This enables the lumbar support to adapt to the lumbar curves of different users as much as possible, effectively solving the problem that the traditional fixed connection structure cannot change the position of the lumbar support in the seat depth direction. It meets the different requirements of users for lumbar support strength and position due to differences in body shape, usage habits or scenario needs, thereby improving the comfort of the chair when in use.

[0033] In this embodiment, the movable bracket 3 is provided with an adjustment and telescopic groove 31, and at least part of the adjustment bracket 4 is slidably guided within the adjustment and telescopic groove 31 to achieve guidance.

[0034] In this embodiment, the adjusting bracket 4 is provided with an adjusting groove 41, and the adjusting groove 41 is provided with at least one gear array. The gear array includes multiple gear slots 42 arranged in a straight line. The position locking structure includes a locking base 5, a locking member 6, and an elastic member 7. The locking base 5 is located in the adjusting groove 41 and is fixedly connected to the movable bracket 3. The locking base 5 is provided with a locking guide groove 51. The locking member 6 is at least partially slidably guided in the locking guide groove 51. The elastic member 7 is installed in the locking guide groove 51 and uses elasticity to push the locking member 6 to move towards the gear slot 42. When the locking member 6 is engaged with any gear slot 42, a latching limit is formed.

[0035] In this embodiment, there are two gear positions arranged symmetrically, and two locking members 6 arranged symmetrically from left to right. Each locking member 6 corresponds to one gear position array. The left and right ends of the elastic member 7 are respectively connected to the two locking members 6. The elastic member 7 is a compression spring, and each locking member 6 is provided with a spring groove for the end of the compression spring to be inserted, thereby realizing the positioning between the compression spring and the locking member 6.

[0036] In this embodiment, the locking member 6 includes a locking body 61, a locking tooth 62 integrally formed and connected to the locking body 61, an unlocking linkage part 63, and an unlocking retaining part 64. The locking tooth 62 is connected to the unlocking retaining part 64. The locking body 61 is guided and fitted in the locking guide groove 51. The locking guide groove 51 is connected to a guide groove telescopic opening 52 that penetrates the locking base 5 along the telescopic direction of the locking member 6. The locking tooth 62 and the unlocking linkage part 63 can extend out of the locking guide groove 51 from the guide groove telescopic opening 52.

[0037] In this embodiment, the position locking structure further includes a self-locking member 8 for keeping the locking member 6 out of the position slot 42 when it engages with the locking member 6. The adjusting groove 41 is provided with an unlocking drive slope 43 for driving the unlocking linkage 63 to engage the locking member 6 with the self-locking member 8, a first self-locking drive surface 44 for driving the self-locking member 8 to move forward relative to the locking base 5, and a second self-locking drive surface 45 for driving the self-locking member 8 to move backward relative to the locking base 5.

[0038] In this embodiment, the self-locking member 8 includes a self-locking drive part 81, a self-locking constraint part 82 integrally formed and connected to the self-locking drive part 81, and a self-locking connection part 83. The self-locking connection part 83 is connected to both the self-locking constraint part 82 and the self-locking drive part 81. The self-locking constraint part 82 has two parts, each corresponding to an unlocking retaining part 64 of a locking member 6. When the unlocking retaining part 64 of a locking member 6 is hooked onto the self-locking constraint part 82, the locking member 6 cannot move in the direction of the guide slot extension opening 52, thereby keeping the locking member 6 in the state of being disengaged from the gear slot 42.

[0039] After the locking tooth 62 engages with the last gear slot 42, the adjusting bracket 4 continues to move forward via the lumbar support. During this process, the unlocking drive ramp 43 first pushes against the unlocking linkage part 63, causing the locking member 6 to retract into the locking guide groove 51, thus disengaging the locking tooth 62 from the last gear slot 42. At this time, the elastic member 7 is compressed. Simultaneously, as the adjusting bracket 4 continues to move forward, the first self-locking drive surface 44 pushes against the self-locking drive part 81, causing the self-locking member 8 to move forward relative to the locking base 5, thus moving the self-locking constraint part 82 towards the unlocking holding part 64 of the locking member 6, causing the unlocking holding part 64 to engage. The locking teeth 62 are engaged with the self-locking constraint part 82 to form a self-lock, keeping the locking teeth 62 disengaged from the gear slot 42. Then, the adjusting bracket 4 is pushed backward. When the second self-locking drive surface 45 presses against the unlocking linkage part 63, the self-locking member 8 moves backward relative to the locking base 5, causing the self-locking constraint part 82 to move away from the unlocking holding part 64 and separate from the unlocking holding part 64. At this time, the elastic member 7 unfolds and drives the locking member 6 to extend outward toward the locking guide groove 51, allowing the locking teeth 62 to engage in the first gear slot 42, locking the position of the adjusting bracket 4 relative to the movable bracket 3.

[0040] In this embodiment, the movable bracket 3 is provided with a sliding groove 32, and the fixed bracket 1 has a fixed guide rail 11 extending into the sliding groove 32. There are two sliding grooves 32, which are located at the left and right ends of the sliding space, respectively. Each sliding groove 32 corresponds to a fixed guide rail 11. The guiding structure includes a first movable guide surface 111 located outside the fixed guide rail 11. A guide roller 30 is rotatably mounted on the movable bracket 3 and rolls on the first movable guide surface 111. Specifically, the movable bracket 3 is provided with a roller groove 33. Both the left and right ends of the roller groove 33 are provided with shaft mounting grooves. The guide roller 30 includes a roller shaft and a roller rotatably mounted on the roller shaft. Both ends of the roller shaft are respectively fitted in the shaft mounting groove. One end of the roller is located in the roller groove 33, and the other end extends out of the roller groove 33 and rolls on the first movable guide surface 111.

[0041] In this embodiment, the fixed bracket 1 is provided with a receiving mounting groove 12, which is connected to a movable clearance opening 13 located on the fixed bracket 1. The rear end of the movable bracket 3 extends into the receiving mounting groove 12 through the movable clearance opening 13. The movable bracket 3 is provided with a sliding connecting part 34 extending into the receiving mounting groove 12, and the fixed bracket 1 is provided with a fixed connecting part 14 located in the receiving mounting groove 12. The two ends of the elastic connector 2 are respectively connected and installed on the sliding connecting part 34 and the fixed connecting part 14. Further, the elastic connector 2 is a tension spring, and both the sliding connecting part 34 and the fixed connecting part 14 are provided with elastic connecting screw holes. The elastic connecting screw holes are threaded with tension spring mounting bolts for connecting the ends of the tension spring, thereby achieving their fixation.

[0042] In this embodiment, the fixed guide rail 11 has a guide rail protrusion 112 located in the receiving mounting groove 12 on the side facing away from the first moving guide surface 111. The guide structure includes a second moving guide surface 113 on the back of the guide rail protrusion 112. The second moving guide surface 113 is mainly used to cooperate with one side of the sliding groove 32 for sliding limit, thereby preventing the movable bracket 3 from moving forward away from the fixed bracket 1.

[0043] In this embodiment, the movable bracket 3 includes a sliding body 35 and a mounting body 36 disposed on the sliding body 35. The mounting body 36 is located in the middle of the sliding body 35. The sliding groove 32 is disposed between the mounting body 36 and the sliding body 35 at the connection position. The adjusting telescopic groove 31 is disposed on the mounting body 36. The roller groove 33 is disposed on the rear end of the sliding body 35. The sliding connecting part 34 is integrally formed and connected to both the mounting body 36 and the sliding body 35.

[0044] In this embodiment, the fixed bracket 1 includes a fixed horizontal portion 15 and two fixed side portions 16 located at the left and right ends of the fixed horizontal portion 15, respectively. The two fixed side portions 16 and the fixed horizontal portion 15 form a U-shaped movement clearance opening 13. A fixed guide rail 11 is provided on the inner side of each fixed side portion 16, and a fixed connecting portion 14 is provided on the fixed horizontal portion 15. Furthermore, the fixed connecting portion 14, the two fixed side portions 16, the fixed horizontal portion 15, and the fixed guide rail 11 are integrally formed.

[0045] In this embodiment, a fixed cover plate 10 is installed on the fixed bracket 1. The fixed cover plate 10 closes the rear opening of the movable clearance port 13, thereby allowing the tension spring to be hidden in the receiving installation groove 12, improving the aesthetics of the product and reducing the risk of the tension spring being damaged by external forces. The fixed cover plate 10 is integrally formed with a cover plate extension 101, which closes the end opening of the U-shaped movable clearance port 13, thereby preventing the movable bracket 3 from sliding out of the end opening of the movable clearance port 13 when it slides upward.

[0046] 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 follow-up lumbar support adjustment structure, comprising a fixed bracket (1), an elastic connector (2), and a movable bracket (3), wherein the fixed bracket (1) is provided with a guide structure for guiding the movable bracket (3) to move up and down, the movable bracket (3) is guided and fitted on the guide structure of the fixed bracket (1), and the two ends of the elastic connector (2) are respectively connected to the fixed bracket (1) and the movable bracket (3), characterized in that: The movable support (3) is guided and fitted with an adjustable support (4) for connecting the lumbar support frame. The adjustable support (4) is movable back and forth and fits on the movable support (3). The relative positions of the adjustable support (4) and the movable support (3) are locked by a position locking structure.

2. The follow-up lumbar support adjustment structure according to claim 1, characterized in that: The movable support (3) is provided with an adjustment telescopic groove (31), and at least part of the adjustment support (4) is slidably guided within the adjustment telescopic groove (31).

3. The follow-up lumbar support adjustment structure according to claim 1, characterized in that: The adjusting bracket (4) is provided with an adjusting groove (41), and the adjusting groove (41) is provided with at least one gear array. The gear array includes multiple gear slots (42) arranged in a straight line. The position locking structure includes a locking base (5), a locking member (6), and an elastic member (7). The locking base (5) is located in the adjusting groove (41) and is fixedly connected to the movable bracket (3). The locking base (5) is provided with a locking guide groove (51). The locking member (6) is at least partially slidably guided in the locking guide groove (51). The elastic member (7) is installed in the locking guide groove (51) and uses elasticity to push the locking member (6) to move towards the gear slot (42). When the locking member (6) cooperates with any gear slot (42), it forms a snap-fit ​​limit.

4. The follow-up lumbar support adjustment structure according to claim 3, characterized in that: The locking component (6) includes a locking body (61), a locking tooth (62) connected to the locking body (61), an unlocking linkage part (63) and an unlocking retaining part (64). The locking body (61) is guided and fitted in the locking guide groove (51). The locking guide groove (51) is connected to a guide groove extension port (52) that penetrates the locking base (5) along the extension direction of the locking component (6). The locking tooth (62) and the unlocking linkage part (63) can extend out of the locking guide groove (51) from the guide groove extension port (52).

5. The follow-up lumbar support adjustment structure according to claim 4, characterized in that: The position locking structure also includes a self-locking member (8) for keeping the locking member (6) out of the position slot (42) when it is engaged with the locking member (6). The adjusting groove (41) is provided with an unlocking drive slope (43) for driving the unlocking linkage (63) to make the locking member (6) engage with the self-locking member (8), a first self-locking drive surface (44) for driving the self-locking member (8) to move forward relative to the locking base (5), and a second self-locking drive surface (45) for driving the self-locking member (8) to move backward relative to the locking base (5).

6. The follow-up lumbar support adjustment structure according to claim 5, characterized in that: The self-locking member (8) includes a self-locking drive part (81) and a self-locking constraint part (82) connected to the self-locking drive part (81). When the unlocking holding part (64) of the locking member (6) is hooked onto the self-locking constraint part (82), the locking member (6) cannot move in the direction of the guide slot extension port (52).

7. A follow-up lumbar support adjustment structure according to any one of claims 1-6, characterized in that: The movable bracket (3) is provided with a sliding groove (32), and the fixed bracket (1) has a fixed guide rail (11) extending into the sliding groove (32); the guide structure includes a first movable guide surface (111) located outside the fixed guide rail (11), and a guide roller (30) is rotatably mounted on the movable bracket (3) and rolling on the first movable guide surface (111).

8. The follow-up lumbar support adjustment structure according to claim 7, characterized in that: The fixed guide rail (11) has a guide rail protrusion (112) located in the receiving mounting groove (12) on the side facing away from the first moving guide surface (111). The guide structure includes a second moving guide surface (113) on the back of the guide rail protrusion (112).

9. The follow-up lumbar support adjustment structure according to claim 8, characterized in that: The fixed bracket (1) is provided with a receiving installation groove (12), which is connected to a movable clearance opening (13) located on the fixed bracket (1). The rear end of the movable bracket (3) extends into the receiving installation groove (12) through the movable clearance opening (13). The movable bracket (3) is provided with a sliding connection part (34) extending into the receiving installation groove (12). The fixed bracket (1) is provided with a fixed connection part (14) located in the receiving installation groove (12). The two ends of the elastic connector (2) are respectively connected and installed on the sliding connection part (34) and the fixed connection part (14).

10. The follow-up lumbar support adjustment structure according to claim 9, characterized in that: A fixed cover plate (10) is installed on the fixed bracket (1), and the fixed cover plate (10) closes the rear opening of the moving clearance opening (13); the fixed cover plate (10) is provided with a cover plate extension (101), and the cover plate extension (101) closes the end opening of the U-shaped moving clearance opening (13).

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