Adjustable waist rest connecting structure

Abstract

The utility model belongs to the technical field of furniture, and particularly relates to an adjustable waist rest connecting structure. The utility model provides an adjustable waist rest connecting structure which is characterized in that a mounting groove, a vertical supporting block, a lifting block unit, an elastic telescopic block unit, a connecting groove, a transverse supporting block, a telescopic sleeve body and an elastic rotating block unit are arranged on a chair back and a waist rest, so that 1, the waist rest is connected with the chair back by inserting the telescopic sleeve body into the lifting block unit; the elastic rotating block unit moves in the connecting groove and is clamped with a transverse supporting block on the lifting block unit, so that the front-back position of the waist rest is adjusted, the positioning is quick and convenient, and the stability is better; 2, an elastic telescopic block unit on the lifting block unit slides in a mounting groove and is clamped with a vertical supporting block on the chair back, so that the vertical position of the waist rest is adjusted, the locking is quick, and the operation is simple.

Description

Technical Field

[0001] The utility model belongs to the technical field of furniture, and particularly relates to an adjustable lumbar support connection structure. Background Art

[0002] As a lumbar support structure, a seat lumbar support is usually fixedly arranged on the backrest. To adapt to different people and different lumbar support requirements, the seat lumbar support is movably connected to the backrest through an adjustable connection structure. The existing lumbar support adjustment structures usually set multiple groups of limit holes or worm gears in the connection structure to adjust the front and back of the lumbar support.

[0003] For example, a Chinese invention patent application with the patent publication number CN 114009992 A and the publication date of February 8, 2022, discloses a lumbar support depth adjustment device, the structure of which includes a lumbar support body, a support component, and an adjustment component arranged beside the support component; the support component includes a matching part and an elastic part, and at least two positioning holes are arranged on the matching part; the adjustment component includes a locking part connected to the back bracket and a control handle for controlling the lateral movement of the locking part.

[0004] The general structural principle of the lumbar support depth adjustment device in this invention patent is as follows: Before the user uses it, the initial position of the lumbar support body can be adjusted in advance. By operating the control handle, the locking pin is disengaged from the positioning hole, and the lumbar support body rotates forward and backward while driving the support component to move up and down to adjust the initial position of the lumbar support body; the locking pin is inserted into the positioning hole at the corresponding position to fix the initial position of the lumbar support body; when the lumbar support body is in different initial positions and is subjected to a backward acting force, the elastic part is deformed to elastically support the lumbar support body. When it is necessary to support the waist, only by acting on the control handle, the lumbar support body can automatically rotate forward and pop out, and then the control handle can be released to lock the lumbar support body in the popped-out position. If the lumbar support body is required to have an ordinary support effect, act on the control handle and push the lumbar support body to rotate backward, and then lock the lumbar support body in the retracted position. The operation and adjustment are light and labor-saving.

[0005] However, during the actual use of this lumbar support depth adjustment device, there are at least the following two deficiencies, in other words, these are the technical problems to be solved by the present utility model.

[0006] 1. The front and back adjustment of this lumbar support is completed through positioning holes and locking pins, and it is not easy to quickly align and complete positioning during adjustment.

[0007] 2. This lumbar support can only complete the front and back adjustment of the lumbar support and cannot achieve the up and down adjustment of the lumbar support.

[0008] Therefore, in summary, there is an urgent need for a new type of lumbar support connection structure with convenient locking and capable of front-back and up-down adjustment. Summary of the Utility Model

[0009] The utility model provides an adjustable lumbar support connection structure, which can adjust the lumbar support by setting installation grooves, vertical support blocks, lifting block units, elastic telescopic block units, connection grooves, horizontal support blocks, telescopic sleeves, and elastic rotating block units on the backrest and the lumbar support, so that: 1. The lumbar support is connected to the backrest by inserting the telescopic sleeve into the lifting block unit, and the elastic rotating block unit moves in the connection groove and engages with the horizontal support block on the lifting block unit, thereby adjusting the front-back position of the lumbar support, with quick and convenient positioning and good stability; 2. The elastic telescopic block unit on the lifting block unit slides in the installation groove and engages with the vertical support block on the backrest, thereby adjusting the up-down position of the lumbar support, with rapid locking and simple operation.

[0010] The technical solution adopted by the utility model to solve the above problems is: an adjustable lumbar support connection structure, including an installation groove provided on the backrest, a vertical support block provided on the installation groove, a lifting block unit provided on the vertical support block, an elastic telescopic block unit provided on the lifting block unit and used for engaging with the vertical support block, a connection groove and a horizontal support block provided on the lifting block unit and used for adjusting the front-back position of the lumbar support, a telescopic sleeve provided on the lifting block unit and connecting the lumbar support, and an elastic rotating block unit provided on the telescopic sleeve and used for engaging with the horizontal support block.

[0011] A further preferred technical solution lies in that: the elastic telescopic block unit includes a movable plate, a limit spring provided at one side end of the movable plate, a triangular limit plate provided at the other side end of the movable plate, and a protruding block provided on the movable plate and used for engaging with the vertical support block.

[0012] A further preferred technical solution lies in that: the elastic rotating block unit includes a rotating rod, a rotating shaft provided in the telescopic sleeve and used for inserting one end of the rotating rod, a protruding column provided at the other end of the rotating rod and used for engaging with the horizontal support block, and a support spring provided on the side wall of the rotating rod and used for connecting the telescopic sleeve.

[0013] A further preferred technical solution lies in that: the lifting block unit includes a sliding block provided on the backrest, a movable groove provided on the sliding block and used for installing the elastic telescopic block unit, a locking block provided on the movable groove and used for abutting against the triangular limit plate, and an installation cross plate provided on the sliding block and used for inserting the telescopic sleeve.

[0014] A further preferred technical solution lies in that: the lifting block unit further includes tooth plates provided on the installation cross plate and located on both sides of the connection groove, a hanging plate hung on the tooth plates, and an L-shaped guiding groove provided on the hanging plate and used for inserting the protruding column.

[0015] A further preferred technical solution is that: the elastic telescopic block unit further includes a chamfered corner provided on the movable plate.

[0016] A further preferred technical solution is that: the elastic telescopic block unit further includes a protective cylinder provided on the movable plate and used for sleeving the limit spring.

[0017] A further preferred technical solution is that: a protective plate for installing the support spring and protecting the rotating rod is provided on the telescopic sleeve body.

[0018] A further preferred technical solution is that: a backrest connecting plate for providing the installation groove and the vertical support block and clamping the sliding block is provided on the backrest.

[0019] A further preferred technical solution is that: a U-shaped back plate for inserting the sliding block is provided on the backrest connecting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a position sectional view of the present utility model.

[0021] Figure 2 It is a partial perspective view of the present utility model.

[0022] Figure 3 It is a position perspective view of the elastic telescopic block unit in the present utility model.

[0023] Figure 4 It is a partial enlarged view of the present utility model.

[0024] Figure 5 It is a connection schematic diagram of the elastic telescopic block unit in the locked state of the present utility model.

[0025] Figure 6 It is a connection schematic diagram of the elastic telescopic block unit in the unlocked state of the present utility model.

[0026] Figure 7 It is a connection perspective view of the lifting block unit in the present utility model.

[0027] Figure 8 It is a connection schematic diagram of the lifting block unit and the elastic rotating block unit in the present utility model.

[0028] Figure 9 It is a position schematic diagram of the elastic rotating block unit in the present utility model.

[0029] Figure 10 It is a connection schematic diagram of the lifting block unit and the elastic rotating block unit in the unlocked state of the present utility model.

[0030] Figure 11 Schematic connection diagram of the locking state of the lifting block unit and the elastic rotating block unit in the present utility model.

[0031] Figure 12 Schematic position diagram of the present utility model.

[0032] Figure 13 Exploded view of the structure of the backrest connecting plate and the U-shaped backplate in the present utility model.

[0033] In the figure, the meanings of the respective markings are as follows:

[0034] Backrest a, lumbar support b;

[0035] Mounting groove 1, vertical support block 2, lifting block unit 3, elastic telescopic block unit 4, connecting groove 5, horizontal support block 6, telescopic sleeve body 7, elastic rotating block unit 8, protective plate 9, backrest connecting plate 10, U-shaped backplate 11;

[0036] Slider 301, movable groove 302, locking block 303, mounting cross plate 304, toothed plate 305, hanging plate 306, L-shaped guiding groove 307, movable plate 401, limiting spring 402, triangular limiting plate 403, protruding block 404, rounded corner 405, protective cylinder 406, rotating rod 801, rotating shaft 802, protruding column 803, support spring 804. Specific embodiments

[0037] The following is only a preferred embodiment of the present utility model, and does not limit the scope of the present utility model.

[0038] As shown in the appendix Figures 1-13 As shown, an adjustable lumbar support connection structure includes a mounting groove 1 provided on the backrest a, a vertical support block 2 provided on the mounting groove 1, a lifting block unit 3 provided on the vertical support block 2, an elastic telescopic block unit 4 provided on the lifting block unit 3 and used for clamping the vertical support block 2, a connecting groove 5 and a horizontal support block 6 provided on the lifting block unit 3 and used for adjusting the front and rear positions of the lumbar support b, a telescopic sleeve body 7 provided on the lifting block unit 3 and connecting the lumbar support b, and an elastic rotating block unit 8 provided on the telescopic sleeve body 7 and used for clamping the horizontal support block 6.

[0039] In this embodiment, the mounting groove 1 is provided on the backrest a, the vertical support blocks 2 are spaced apart on the mounting groove 1, the lifting block unit 3 is clamped on the backrest a and is close to the vertical support block 2, one end of the lifting block unit 3 is clamped on the backrest a, and the other end is used for inserting the telescopic sleeve body 7, and the telescopic sleeve body 7 is used for connecting the lumbar support b.

[0040] Further, the elastic telescopic block unit 4 is movably arranged on the lifting block unit 3 and moves within the installation groove 1. By engaging with the vertical support block 2, the up-and-down position of the lumbar support b is locked.

[0041] In addition, one end of the telescopic sleeve body 7 for inserting the lifting block unit 3 is provided with the connection groove 5 and the transverse support block 6. The elastic rotary block unit 8 on the telescopic sleeve body 7 moves within the connection groove 5, and the front-and-back position of the lumbar support b is adjusted by engaging with the transverse support block 6.

[0042] The elastic telescopic block unit 4 includes a movable plate 401, a limiting spring 402 arranged on one side end of the movable plate 401, a triangular limiting plate 403 arranged on the other side end of the movable plate 401, and a protruding block 404 arranged on the movable plate 401 and used for engaging with the vertical support block 2.

[0043] In this embodiment, the movable plate 401 floats on the sliding block 301 and moves within the movable groove 302. Both ends of the limiting spring 402 are respectively connected to the side wall of the movable plate 401 and the sliding block 301. The limiting spring 402 is located on the side away from the vertical support block 2. Thus, while the limiting spring 402 connects the movable plate 401, when the movable plate 401 is stressed, the limiting spring 402 gives a supporting force in the opposite direction, having a reset effect. The triangular limiting plate 403 is arranged on the movable plate 401 and on the side away from the limiting spring 402. The included angle between the triangular limiting plate 403 and the movable plate 402 is an obtuse angle, enabling the movable plate 401 to complete a swinging arm movement at a certain angle. The protruding block 404 protrudes from the movable plate 401 and moves within the installation groove 1. When the protruding block 404 moves upward, due to the influence of the limiting spring 402 at the other end, when the protruding block 404 passes through the vertical support block 2, the protruding block 404 is pushed into the vertical support block 2 by the limiting spring 402 and engaged with it, thus achieving the effect of limiting and locking. Since the vertical support block 2 is provided with a concave arc surface, after the protruding block 404 is locked on the vertical support block 2, it can be locked on the next vertical support block 2 by continuing to move upward. To unlock, only need to move the protruding block 404 to the top of the installation groove 1, and then quickly slide the protruding block 404 downward along the side wall of the installation groove 1, so that the protruding block 404 is located at the bottom of the installation groove 1. Under the thrust of the limiting spring 402, the protruding block 404 enters the initial locking state.

[0044] The elastic rotating block unit 8 includes a rotating rod 801, a rotating shaft 802 disposed within the telescopic sleeve body 7 and for inserting one end of the rotating rod 801, a protruding column 803 disposed at the other end of the rotating rod 801 and for engaging the lateral support block 6, and a support spring 804 disposed on the side wall of the rotating rod 801 and for connecting the telescopic sleeve body 7.

[0045] In this embodiment, the rotating rod 801 is movably disposed within the telescopic sleeve body 7 through the rotating shaft 802, the rotating rod 801 can rotate relative to the rotating shaft 802, the protruding column 803 is located at the other end of the rotating rod 801. When the telescopic sleeve body 7 moves back and forth, it drives the protruding column 803 to move within the connecting groove 5 and the lateral support block 6. When the protruding column 803 passes through the lateral support block 6, under the thrust of the support spring 804, the protruding column 803 is locked by the lateral support block 6, thus achieving a locking effect. To unlock, just continue to move the protruding column 803 forward forcefully, so that the protruding column 803 reaches the top of the connecting groove 5. To unlock and reset, just quickly push it in so that the protruding column 803 reaches the bottom of the connecting groove 5.

[0046] The lifting block unit 3 includes a sliding block 301 disposed on the chair back a, a movable groove 302 disposed on the sliding block 301 and for installing the elastic telescopic block unit 4, a locking block 303 disposed on the movable groove 302 and for abutting against the triangular limiting plate 403, and an installation cross plate 304 disposed on the sliding block 301 and for inserting the telescopic sleeve body 7.

[0047] In this embodiment, the sliding block 301 is engaged with the chair back a and can slide up and down relative to the chair back. The movable groove 302 is used for installing the elastic telescopic block unit 4, and the locking block 303 is used for clamping the triangular limiting plate 403. When the protruding block 404 is in a locked state, the triangular limiting plate 403 is in contact with the lower surface of the locking block 303 and is resisted by it. When the protruding block 404 is located at the top of the installation groove, the side of the movable block 401 is in contact with the side of the locking block 303 and is limited by it. The installation cross plate 304 is used for inserting the telescopic sleeve body 7, and the connecting groove 5 and the lateral support block 6 are disposed on the upper surface of the installation cross plate 304.

[0048] The lifting block unit 3 further includes tooth plates 305 disposed on the installation cross plate 304 and on both sides of the connecting groove 5, a hanging plate 306 hung on the tooth plates 305, and an L-shaped guiding groove 307 disposed on the hanging plate 306 and for inserting the protruding column 803.

[0049] In this embodiment, the toothed plate 305 is disposed on the upper surface of the mounting cross plate 304 and is located on both sides of the connecting groove 5. The hanging plate 306 is hung on the toothed plate 305. The L-shaped guiding groove 307 is correspondingly disposed with the connecting groove 5 and the lateral support block 6, so that the protruding column 803 can move along the L-shaped guiding groove 307, increasing the stability of the movement.

[0050] The elastic telescopic block unit 4 further includes a chamfer 405 disposed on the movable plate 401.

[0051] In this embodiment, the function of the chamfer 405 is to reduce the rotational restriction of the movable plate 401 and simplify the structure to compress the space.

[0052] The elastic telescopic block unit 4 further includes a protective cylinder 406 disposed on the movable plate 401 and used for sleeving the limit spring 402.

[0053] In this embodiment, the function of the protective cylinder 406 is to protect the limit spring 402 and support the movable plate 401 to a certain extent.

[0054] A protective plate 9 for installing the support spring 804 and protecting the rotating rod 801 is disposed on the telescopic sleeve body 7.

[0055] In this embodiment, the protective plate 9 can protect the rotating rod 801. At the same time, when the rotating rod 801 rotates, it can be limited by the protective plate 9 to a certain extent, preventing the rotating rod 801 from having an excessive force swing arm and hitting and damaging the protruding column 803.

[0056] A backrest connecting plate 10 for setting the mounting groove 1 and the vertical support block 2 and engaging the sliding block 301 is disposed on the backrest a.

[0057] In this embodiment, the function of the backrest connecting plate 10 is to connect and engage the sliding block 301, so that the lumbar support connecting structure can be detachably connected to the backrest a.

[0058] A U-shaped back plate 11 for inserting the sliding block 301 is disposed on the backrest connecting plate 10.

[0059] In this embodiment, the function of the U-shaped back plate 11 is to further engage the sliding block 301. The sliding block 301 can slide within the U-shaped back plate 11, and the U-shaped back plate 11 can protect the structures within the lifting block unit 3 and the elastic telescopic block unit 4, preventing them from being interfered by the outside world and ensuring the firmness, relative sealing and beauty of the structure.

[0060] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various modifications can also be made without departing from the gist of the present utility model. These are all non-creative modifications and are protected by the Patent Law as long as they are within the scope of the claims of the present utility model.

Claims

1. An adjustable lumbar support connection structure, characterized in that: It includes a mounting groove (1) provided on the backrest (a), a vertical support block (2) provided on the mounting groove (1), a lifting block unit (3) provided on the vertical support block (2), an elastic telescopic block unit (4) provided on the lifting block unit (3) and used for clamping the vertical support block (2), a connecting groove (5) and a transverse support block (6) provided on the lifting block unit (3) and used for adjusting the front-back position of the lumbar support (b), a telescopic sleeve body (7) provided on the lifting block unit (3) and connecting the lumbar support (b), and an elastic rotating block unit (8) provided on the telescopic sleeve body (7) and used for clamping the transverse support block (6).

2. The adjustable lumbar support connection structure according to claim 1, characterized in that: The elastic telescopic block unit (4) includes a movable plate (401), a limiting spring (402) provided at one side end of the movable plate (401), a triangular limiting plate (403) provided at the other side end of the movable plate (401), and a protruding block (404) provided on the movable plate (401) and used for clamping the vertical support block (2).

3. The adjustable lumbar support connection structure according to claim 2, characterized in that: The elastic rotating block unit (8) includes a rotating rod (801), a rotating shaft (802) provided in the telescopic sleeve body (7) and used for inserting one end of the rotating rod (801), a protruding column (803) provided at the other end of the rotating rod (801) and used for clamping the transverse support block (6), and a support spring (804) provided on the side wall of the rotating rod (801) and used for connecting the telescopic sleeve body (7).

4. The adjustable lumbar support connection structure according to claim 3, wherein: The lifting block unit (3) includes a sliding block (301) provided on the backrest (a), a movable groove (302) provided on the sliding block (301) and used for installing the elastic telescopic block unit (4), a locking block (303) provided on the movable groove (302) and used for abutting against the triangular limiting plate (403), and a mounting cross plate (304) provided on the sliding block (301) and used for inserting the telescopic sleeve body (7).

5. The adjustable lumbar support connection structure according to claim 4, characterized in that: The lifting block unit (3) further includes tooth plates (305) provided on the mounting cross plate (304) and located on both sides of the connecting groove (5), a hanging plate (306) hung on the tooth plates (305), and an L-shaped guiding groove (307) provided on the hanging plate (306) and used for inserting the protruding column (803).

6. The adjustable lumbar support connection structure according to claim 2, characterized in that: The elastic telescopic block unit (4) further includes a rounded corner (405) provided on the movable plate (401).

7. An adjustable lumbar support connection structure according to claim 2, characterized in that: The elastic telescopic block unit (4) further includes a protective cylinder (406) provided on the movable plate (401) and used for sleeving the limiting spring (402).

8. An adjustable lumbar support connection structure according to claim 5, characterized in that: A protective plate (9) for installing the support spring (804) and protecting the rotating rod (801) is provided on the telescopic sleeve body (7).

9. The adjustable lumbar support connection structure according to claim 4, characterized in that: A backrest connecting plate (10) for providing the mounting groove (1) and the vertical support block (2) and clamping the sliding block (301) is provided on the backrest (a).

10. The adjustable lumbar support connection structure according to claim 9, characterized in that: The U-shaped backboard (11) for inserting the sliding block (301) is arranged on the backrest connecting plate (10).

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