A multi-directional adjustable slide rail installation mechanism

By designing a multi-directional adjustment slide rail installation mechanism, using adjustable buckle components and adjustment integrated modules, the limitations and structural complexity of slide rail installation position adjustment in the prior art are solved, and multi-directional precision adjustment and structural stability of slide rails are achieved.

CN222722682UActive Publication Date: 2025-04-08GUANGDONG HEGU HARDWARE PRECISION MFG CO LTD
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Patent Information

Application Number
CN202420561540.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-21
Publication Date
2025-04-08
Estimated Expiration
2034-03-21

AI Technical Summary

Technical Problem

When adjusting the installation position between the slide rail and the drawer, the existing slide rail installation mechanism is easy to reduce the buffer distance of the slide rail, the complex structure increases the manufacturing cost, the operation is cumbersome and not suitable for slide rails of different sizes.

Method used

A multi-directional adjustment slide rail installation mechanism is designed, and the adjustable buckle assembly is adopted, including a shell, an elastic handle and an adjustment integrated module. Through the front, rear, left, and upper and lower adjustment modules and rotary knob structure, the drawer is precisely adjusted in multiple directions.

Benefits of technology

It realizes multi-directional adjustment of the slide rail, simplifies structure and operation, improves assembly precision and structural stability, and is suitable for slide rails of different sizes, especially buffered slide rails and pressing slide rails.

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Abstract

The utility model provides a multi-directionally adjustable slide rail installation mechanism, comprising a rail body and an adjustable buckle handle assembly, the adjustable buckle handle assembly comprising an outer shell, an elastic handle, and an adjustment integrated module, the outer shell being installed in a drawer, the adjustment integrated module comprising a front-and-back adjustment module, a left-and-right adjustment module, and an up-and-down adjustment module, the elastic handle being rotatably connected to the front-and-back adjustment module and buckling the front-and-back adjustment module on a movable rail under the elastic action of the elastic handle, the structure is simple, and can be quickly assembled and disassembled, the front-and-back adjustment module is slidably installed in the outer shell front-and-back, the left-and-right adjustment module is slidably installed in the front-and-back adjustment module left-and-right and buckled on the end of the movable rail of the rail body, the up-and-down adjustment module is slidably installed in the front-and-back adjustment module left-and-right and is slidably connected to the movable rail, and the structure of the front-and-back adjustment knob, the left-and-right adjustment knob, and the up-and-down adjustment knob is convenient to operate, the installation position of the drawer can be adjusted in multiple directions, the assembly precision is improved, the structural stability is high, and the use effect of the drawer is guaranteed.
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Description

Technical Field

[0001] The utility model relates to the technical field of slide rail installation, in particular to a slide rail installation mechanism with multi-directional adjustment. Background Art

[0002] The slide rail is an indispensable component in the drawer installation. When the operator acts on the drawer, the slide rail is driven to extend and retract to realize the pushing and pulling of the drawer.

[0003] Existing slide rails generally include a fixed rail, a middle rail, and a movable rail. The fixed rail is installed on the cabinet body, and the movable rail is installed on the drawer. The fixed rail, the middle rail, and the movable rail are slidably connected in sequence.

[0004] Among them, the traditional movable rail is generally installed on the drawer through an installation mechanism, which generally includes a fixed seat, an adjustment seat, and a buckle handle. The fixed seat is installed at the bottom of the drawer, the adjustment seat is positioned and slidably mounted on the fixed seat, and the buckle handle is rotatably connected to the adjustment seat and buckled with the movable rail. The installation position between the drawer and the slide rail is adjusted by using the installation mechanism. However, the traditional installation mechanism generally has the following shortcomings in practical applications:

[0005] 1. When adjusting the front and rear installation position between the slide rail and the drawer, the actual adjustment of the front and rear position of the movable rail and the fixed rail will reduce the buffering distance and effect of the slide rail. It is especially not suitable for use with buffer slide rails, push-type slide rails, etc., and has great limitations in use. At the same time, the installation mechanism is in direct contact with the fixed rail for a long time, which is easy to affect the service life.

[0006] 2. The structure is complex, which increases the manufacturing cost. The assembly precision between the slide rail and the drawer is high, and the operation is cumbersome, which easily affects the assembly effect of the drawer.

[0007] 3. Although the handle can be loosened or fastened to the slide rail by rotating it, the operating force is large, and the fastening position cannot be adjusted according to the size of the slide rail, so its applicability is low. Utility Model Content

[0008] The purpose of the invention of the utility model is to overcome the shortcomings of the prior art and provide a multi-directional adjustable slide rail installation mechanism, which has a simple structure, can be quickly assembled and disassembled, is easy to operate, and can adjust the installation position of the drawer front and back, left and right, up and down after installation, multi-directional adjustment, improve assembly precision, enhance structural stability, and ensure the use effect of the drawer.

[0009] The invention objective of the utility model is achieved as follows: a multi-directionally adjustable slide rail installation mechanism, comprising a rail body for opening and closing a drawer and an adjustable buckle handle assembly arranged between the rail body and the drawer, wherein the adjustable buckle handle assembly comprises a shell, an elastic handle, and an adjustment integrated module, the shell is installed in the drawer, and the adjustment integrated module comprises a front-to-back adjustment module for adjusting the front-to-back installation position of the drawer relative to the rail body, a left-to-right adjustment module for adjusting the left-to-right installation position of the drawer relative to the rail body, and an up-down adjustment module for adjusting the up-down installation position of the drawer relative to the rail body.

[0010] The elastic handle is rotatably connected to the front and rear adjustment module and, under the action of its elasticity, the front and rear adjustment module is buckled on the movable rail of the rail body; the front and rear adjustment module is slidably mounted on the outer shell front and back, and the front and rear adjustment module is spirally connected with a front and rear adjustment knob; the front and rear adjustment knob is rotatably connected to the outer shell; the left and right adjustment module is slidably mounted on the front and rear adjustment module left and right and buckled on the end of the movable rail of the rail body; at the same time, the left and right adjustment module is spirally connected with a left and right adjustment knob; the left and right adjustment knob is rotatably connected to the front and rear adjustment module; the up and down adjustment module is slidably mounted on the front and rear adjustment module left and right and slidably connected to the movable rail of the rail body; the up and down adjustment module is threadedly connected with an up and down adjustment knob; and the up and down adjustment knob is rotatably connected to the left and right adjustment module.

[0011] According to the above optimization, the shell is provided with a front and rear guide cavity for adapting the up and down sliding of the front and rear adjustment module, and the front and rear guide cavity is provided with a front and rear guide buckle and a front and rear knob mounting slot. The front and rear adjustment module is provided with a front and rear limiting guide groove that is matched with the front and rear guide buckle and can slide relative to the front and rear guide buckle with the movement, and a front and rear threaded groove that is threadedly connected to the front and rear adjustment knob. The front and rear adjustment knob is rotatably connected to the front and rear knob mounting slot.

[0012] According to the above optimization, the front end of the front and rear adjustment module is provided with left and right adjustment slots for the left and right sliding of the left and right adjustment module, the left and right adjustment slots are provided with left and right guide grooves and left and right knob mounting slots, the left and right adjustment module is provided with left and right limiting buckles that match the left and right guide grooves and can slide relative to the left and right guide grooves with the movement, and left and right threaded grooves that are threadedly connected to the left and right adjustment knobs, and the left and right adjustment knobs are rotatably connected to the left and right knob mounting slots.

[0013] According to the above optimization, the left and right adjustment module is provided with upper and lower adjustment slots for the upper and lower adjustment module to slide left and right, the upper and lower adjustment slots are provided with upper and lower guide grooves and upper and lower knob mounting slots, the upper and lower adjustment module is provided with upper and lower limiting buckles that are matched with the upper and lower guide grooves and can slide relative to the upper and lower guide grooves with the movement, and upper and lower spiral grooves that are spirally connected to the upper and lower adjustment knobs, and the upper and lower adjustment knobs are rotatably connected to the upper and lower knob mounting slots.

[0014] According to the above optimization, the movable rail of the rail body is provided with a connecting buckle block, the connecting buckle block is installed at the front end of the movable rail, and one side of the connecting buckle block is provided with adjustable locking teeth for buckling with the elastic handle.

[0015] According to the above optimization, the left and right adjustment modules are integrally connected with a connecting plug-in block, and the connecting buckle block is provided with an installation slot for matching and plugging with the connecting plug-in block.

[0016] According to the above optimization, the left and right adjustment modules are integrally connected with a buffer block elastically connected to the connecting buckle block.

[0017] According to the above optimization, the connecting buckle block is slidably connected with the upper and lower adjustment modules and has an inclined connection position.

[0018] According to the above optimization, the elastic handle includes an elastic member, a locking block, and a handle. The front and rear adjustment module is provided with an elastic locking head rotatably connected to the handle, and one end of the handle is connected to the locking block. The two elastic ends of the elastic member are respectively connected to the front and rear adjustment module and the locking block. The outer side of the locking block is provided with locking teeth. The locking block is slidably connected to the front and rear adjustment module, and the locking block is extended and retracted left and right inside or outside the shell through the control of the handle so that the locking teeth and the adjustable locking teeth are matched and buckled or separated.

[0019] The advantages of the utility model are:

[0020] 1) By adopting the adjustment integrated module of this structure, when the front-back adjustment knob is turned, the housing moves forward and backward relative to the front-back adjustment module, so that the movable rail of the slide rail remains stationary while the drawer moves forward and backward, and the installation position of the drawer relative to the slide rail is effectively adjusted to ensure that the original assembly gap between the slide rail relative to the cabinet and the drawer remains unchanged, which is suitable for the assembly and use of different slide rails, especially press-type slide rails.

[0021] 2) The installation mechanism of this structure can effectively realize the targeted adjustment of the installation position of the drawer in front and back, left and right, up and down directions. It has a simple structure and is easy to operate. It can also effectively improve the assembly precision, enhance the structural stability, and ensure the quality of product use.

[0022] 3) By adopting the elastic handle of the present structure in coordination with the structure of the connecting buckle block, the locking teeth of the elastic handle are locked on the adjustable locking teeth under the elastic action, or the elastic handle is pressed to unlock and separate the locking teeth from the adjustable locking teeth, which is convenient for assembly and disassembly, easy to operate, and the installation position of the installation mechanism can be adjusted according to the installation requirements of different slide rails. It is widely applicable and ensures the use effect of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the installation of a preferred embodiment of the utility model.

[0024] Figure 2 This is a schematic diagram of the installation of an adjustable buckle handle assembly and a movable rail according to a preferred embodiment of the utility model.

[0025] Figure 3 This is a schematic structural diagram of an adjustable buckle handle assembly according to a preferred embodiment of the utility model.

[0026] Figure 4 This is a schematic structural diagram of another angle of the adjustable buckle handle assembly of a preferred embodiment of the utility model.

[0027] Figure 5 This is a partial exploded view of the adjustable buckle handle assembly of the preferred embodiment of the utility model.

[0028] Figure 6 This is an exploded view of the adjustable buckle handle assembly of the preferred embodiment of the utility model.

[0029] Figure 7 This is an exploded view of the adjustable buckle handle assembly at another angle according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings.

[0031] According to the attached Figures 1 to 7 As shown, the multi-directionally adjustable slide rail installation mechanism of the utility model includes a rail body 2 for opening and closing a drawer 1 and an adjustable buckle handle assembly provided between the rail body 2 and the drawer 1. The adjustable buckle handle assembly includes a shell 3, an elastic handle 4, and an adjustment integrated module. The shell 3 is installed on the drawer 1, and the adjustment integrated module includes a front-to-back adjustment module 5 for adjusting the front-to-back installation position of the drawer 1 relative to the rail body 2, a left-right adjustment module 6 for adjusting the left-to-right installation position of the drawer 1 relative to the rail body 2, and an up-down adjustment module 7 for adjusting the up-down installation position of the drawer 1 relative to the rail body 2. The elastic handle 4 is rotatably connected to the front-to-back adjustment module 5 and buckles the front-to-back adjustment module 5 on the movable rail 21 of the rail body 2 under its elastic action. The front-to-back adjustment module 5 is slidably installed on the shell 3, and the front-to-back adjustment module 5 is spirally connected to the front-to-back adjustment knob 8, and the front-to-back adjustment knob 8 is rotatably connected to the shell 3. The left-right adjustment module 6 is slidably mounted on the front-back adjustment module 5 and buckled on the end of the movable rail 21 of the rail body 2. At the same time, the left-right adjustment module 6 is spirally connected with a left-right adjustment knob 9, and the left-right adjustment knob 9 is rotatably connected to the front-back adjustment module 5. The up-down adjustment module 7 is slidably mounted on the front-back adjustment module 5 and slidably connected to the movable rail 21 of the rail body 2. The up-down adjustment module 7 is threadedly connected with an up-down adjustment knob 10, and the up-down adjustment knob 10 is rotatably connected to the left-right adjustment module 6.

[0032] The installation mechanism of this structure can effectively achieve targeted adjustment of the front and back, left and right, and top and bottom installation positions of the drawer 1 by adjusting the front and back adjustment module 5 and the front and back adjustment knob 8, the left and right adjustment module 6 and the left and right adjustment knob 9, and the up and down adjustment module 7 and the up and down adjustment knob 10 of the integrated module. It has a simple structure and is easy to operate, while also improving assembly precision, enhancing structural stability, and ensuring the quality of product use.

[0033] Reference Figures 1 to 7 As shown, in further detail, the shell 3 is provided with a front and rear guide cavity 31 for adapting the up and down sliding of the front and rear adjustment module 5, and the front and rear guide cavity 31 is provided with a front and rear guide buckle 32 and a front and rear knob mounting slot 33, the front and rear adjustment module 5 is provided with a front and rear limiting guide groove 51 which is matched with the front and rear guide buckle 32 and can slide relative to the front and rear guide buckle 32 with the movement, and a front and rear threaded groove 52 which is threadedly connected to the front and rear adjustment knob 8, and the front and rear adjustment knob 8 is rotatably connected to the front and rear knob mounting slot 33.

[0034] By adopting the adjustment integrated module of the present structure, when the front-rear adjustment knob 8 is rotated, the housing 3 moves forward and backward relative to the front-rear adjustment module 5, so that the drawer 1 moves forward and backward while the movable rail 21 of the slide rail remains stationary, thereby effectively adjusting the installation position of the drawer 1 relative to the slide rail to ensure that the original assembly gap between the slide rail relative to the cabinet and the drawer 1 remains unchanged, and adapting to the assembly and use of different slide rails, especially push-type slide rails.

[0035] Reference Figures 1 to 7 As shown, in further detail, the front end of the front and rear adjustment module 5 is provided with a left and right adjustment slot 53 for the left and right adjustment module 6 to slide left and right, the left and right adjustment slot 53 is provided with a left and right guide slot 54 and a left and right knob mounting slot 55, the left and right adjustment module 6 is provided with a left and right limiting buckle 61 that matches the left and right guide slots 54 and can slide relative to the left and right guide slots 54 as it moves, and a left and right threaded groove 62 that is threadedly connected to the left and right adjustment knobs 9, and the left and right adjustment knobs 9 are rotatably connected to the left and right knob mounting slots 55.

[0036] When the left-right adjustment knob 9 is turned, the left-right adjustment module 6 moves left-right relative to the front-back adjustment module 5 to adjust the left-right movement of the drawer 1 relative to the movable rail 21, thereby adjusting the installation position of the drawer 1 relative to the left and right of the rail body 2, which is easy to operate, improves the structural stability, and ensures the normal opening and closing of the drawer 1.

[0037] Reference Figures 1 to 7As shown, in further detail, the left and right adjustment module 6 is provided with upper and lower adjustment slots 63 for the upper and lower adjustment module 7 to slide left and right, the upper and lower adjustment slots 63 are provided with upper and lower guide slots 64 and upper and lower knob mounting slots 65, the upper and lower adjustment module 7 is provided with upper and lower limiting buckles 71 which are matched with the upper and lower guide slots 64 and can slide relative to the upper and lower guide slots 64 with the movement, and upper and lower spiral grooves 72 which are spirally connected to the upper and lower adjustment knobs 10, and the upper and lower adjustment knobs 10 are rotatably connected to the upper and lower knob mounting slots 65.

[0038] When the up-down adjustment knob 10 is turned, the up-down adjustment module 7 moves left and right relative to the left-right adjustment module 6, causing the up-down adjustment module 7 to slide left and right and connect to the bottom surface of the movable rail 21. Since there is an inclined connection position 14 between the up-down adjustment module 7 and the movable rail 21, the drawer 1 can be adjusted to move upward or downward relative to the movable rail 21 to adjust the installation horizontal position of the drawer 1. The operation is convenient, the structural assembly accuracy is enhanced, the structural stability is improved, and the normal opening and closing of the drawer 1 is ensured.

[0039] Reference Figures 1 to 7 As shown, in further detail, the movable rail 21 of the rail body 2 is provided with a connecting buckle block 11, and the connecting buckle block 11 is installed at the front end of the movable rail 21, and one side of the connecting buckle block 11 is provided with an adjustable locking tooth 12 for buckling with the elastic handle 4.

[0040] The elastic handle 4 includes an elastic member 41, a locking block 42, and a handle 43. The front-rear adjustment module 5 is provided with an elastic lock head 56 rotatably connected to the handle 43, and one end of the handle 43 is connected to the locking block 42. The two elastic ends of the elastic member 41 are respectively connected to the front-rear adjustment module 5 and the locking block 42. The outer side of the locking block 42 is provided with a locking tooth 44. The locking block 42 is slidably connected to the front-rear adjustment module 5, and the locking block 42 is controlled by the handle 43 to be retracted left and right inside or outside the housing 3, so that the locking tooth 44 and the adjustable locking tooth 12 are matched and buckled or separated.

[0041] By adopting the elastic handle 4 of the present structure and cooperating with the structure of the connecting buckle block 11, the locking teeth 44 of the elastic handle 4 are locked on the adjustable locking teeth 12 under the elastic action, or the elastic handle 4 is pressed to unlock and separate the locking teeth 44 from the adjustable locking teeth 12, which is convenient for assembly and disassembly, easy to operate, and can adjust the installation position of the installation mechanism according to the installation requirements of different slide rails. It is widely applicable and ensures the use effect of the product.

[0042] Moreover, the left and right adjustment modules 6 are integrally connected with the connecting plug block 66, and the connecting buckle block 11 is provided with an installation slot 13 for matching and inserting the connecting plug block 66. It is convenient to assemble and disassemble, easy to operate, and can enhance the structural stability without damaging the movable rail 21.

[0043] At the same time, the connecting buckle block 11 is slidably connected with the up-and-down adjusting module 7 by an inclined connecting position 14. The structure is simple, the assembly accuracy of the horizontal position of the drawer 1 is ensured, and the manufacturing is easy, the rail body 2 is not damaged, and the compression resistance of the rail body 2 is enhanced.

[0044] In addition, the left and right adjustment modules 6 are integrally connected with a buffer block 67 elastically connected to the connecting buckle block 11. Under the action of the buffer block 67, the buffering effect is good, soft contact is achieved, and direct hard collision is avoided to generate noise, thereby improving the use effect of the product.

[0045] The above-mentioned specific embodiments are only specific implementation methods with better effects of the present utility model. All structures that are the same or equivalent to the multi-directional adjustable slide rail installation mechanism of the present utility model are within the protection scope of the present utility model.

Claims

1. A multi-directionally adjustable slide rail installation mechanism, comprising a rail body (2) for opening and closing a drawer (1) and an adjustable buckle handle assembly provided between the rail body (2) and the drawer (1), characterized in that: The adjustable buckle handle assembly comprises a housing (3), an elastic handle (4), and an adjustment integrated module. The housing (3) is mounted on the drawer (1). The adjustment integrated module comprises a front-to-back adjustment module (5) for adjusting the front-to-back installation position of the drawer (1) relative to the rail body (2), a left-to-right adjustment module (6) for adjusting the left-to-right installation position of the drawer (1) relative to the rail body (2), and a top-to-bottom adjustment module (7) for adjusting the top-to-bottom installation position of the drawer (1) relative to the rail body (2). The elastic handle (4) is rotatably connected to the front-rear adjustment module (5) and, under the elastic action of the elastic handle, the front-rear adjustment module (5) is buckled onto the movable rail (21) of the rail body (2). The front-rear adjustment module (5) is slidably mounted on the housing (3) in a front-rear manner and the front-rear adjustment module (5) is spirally connected with a front-rear adjustment knob (8). The front-rear adjustment knob (8) is rotatably connected to the housing (3). The left-right adjustment module (6) is slidably mounted on the front-rear adjustment module (5) in a front-rear manner and buckled onto the end of the movable rail (21) of the rail body (2). At the same time, the left-right adjustment module (6) is spirally connected with a left-right adjustment knob (9). The left-right adjustment knob (9) is rotatably connected to the front-rear adjustment module (5). The up-down adjustment module (7) is slidably mounted on the left-right adjustment module (6) in a front-rear manner and slidably connected to the movable rail (21) of the rail body (2). The up-down adjustment module (7) is threadedly connected with an up-down adjustment knob (10). The up-down adjustment knob (10) is rotatably connected to the left-right adjustment module (6).

2. The multi-directionally adjustable slide rail installation mechanism according to claim 1, characterized in that: The housing (3) is provided with a front and rear guide cavity (31) adapted for the up and down sliding movement of the front and rear adjustment module (5); the front and rear guide cavity (31) is provided with a front and rear guide buckle (32) and a front and rear knob mounting slot (33); the front and rear adjustment module (5) is provided with a front and rear limiting guide groove (51) matched with the front and rear guide buckle (32) and capable of sliding relative to the front and rear guide buckle (32) as it moves; and a front and rear thread groove (52) threadably connected to the front and rear adjustment knob (8); the front and rear adjustment knob (8) is rotatably connected to the front and rear knob mounting slot (33).

3. The multi-directionally adjustable slide rail installation mechanism according to claim 1, characterized in that: The front end of the front-rear adjustment module (5) is provided with an adjustment left-right slot (53) for the left-right adjustment module (6) to slide left-right, the adjustment left-right slot (53) is provided with a left-right guide slot (54) and a left-right knob mounting slot (55), the left-right adjustment module (6) is provided with a left-right limiting buckle (61) matched with the left-right guide slot (54) and capable of sliding relative to the left-right guide slot (54) as it moves, and a left-right threaded slot (62) threadedly connected to the left-right adjustment knob (9), the left-right adjustment knob (9) being rotatably connected to the left-right knob mounting slot (55).

4. The multi-directionally adjustable slide rail installation mechanism according to claim 1, characterized in that: The left-right adjustment module (6) is provided with an upper and lower adjustment slot (63) for the upper and lower adjustment module (7) to slide left and right, the upper and lower adjustment slot (63) is provided with an upper and lower guide slot (64) and an upper and lower knob mounting slot (65), the upper and lower adjustment module (7) is provided with an upper and lower limit buckle (71) which is matched with the upper and lower guide slot (64) and can slide relative to the upper and lower guide slot (64) with movement, and an upper and lower spiral groove (72) which is spirally connected to the upper and lower adjustment knob (10), and the upper and lower adjustment knob (10) is rotatably connected to the upper and lower knob mounting slot (65).

5. The multi-directionally adjustable slide rail installation mechanism according to claim 1, characterized in that: The movable rail (21) of the rail body (2) is provided with a connecting buckle block (11), the connecting buckle block (11) is installed at the front end of the movable rail (21), and one side of the connecting buckle block (11) is provided with adjustable locking teeth (12) for buckling with the elastic handle (4).

6. The multi-directionally adjustable slide rail installation mechanism according to claim 5, characterized in that: The left and right adjustment modules (6) are integrally connected to a connecting plug block (66), and the connecting buckle block (11) is provided with a mounting slot (13) for matching and plugging with the connecting plug block (66).

7. The multi-directionally adjustable slide rail installation mechanism according to claim 5, characterized in that: The left and right adjustment modules (6) are integrally connected with a buffer block (67) elastically connected to the connecting buckle block (11).

8. The multi-directionally adjustable slide rail installation mechanism according to claim 5, characterized in that: An inclined connection position (14) is slidably connected between the connecting buckle block (11) and the upper and lower adjustment module (7).

9. The multi-directionally adjustable slide rail installation mechanism according to claim 5, characterized in that: The elastic handle (4) comprises an elastic member (41), a locking block (42), and a handle (43); the front-rear adjustment module (5) is provided with an elastic locking head (56) rotatably connected to the handle (43); one end of the handle (43) is connected to the locking block (42); two elastic ends of the elastic member (41) are respectively connected to the front-rear adjustment module (5) and the locking block (42); a locking tooth (44) is provided on the outer side of the locking block (42); the locking block (42) is slidably connected to the front-rear adjustment module (5); and the locking block (42) is controlled by the handle (43) to be retracted left and right inside or outside the housing (3) so that the locking tooth (44) and the adjustable locking tooth (12) are matched and buckled or separated.