Locking mechanism

Abstract

The utility model relates to a locking mechanism which comprises a fixed block which is provided with a fixed sawtooth structure, one end of the fixed block is provided with a connecting block, the connecting block is provided with a mounting groove, a movable block is provided with a sliding sawtooth structure clamped with the fixed sawtooth structure, one end of the movable block is provided with a threaded hole, and the fixed block and the movable block are movably connected through a connecting piece. The pushing piece enables the movable block to move relative to the fixed block and comprises a screw assembly, a sliding block and a check ring, the sliding block is located on the side, away from the movable block, of the connecting block and is in sliding fit with the connecting block through an inclined face, and the screw assembly movably penetrates through the sliding block and the mounting groove to be in threaded connection with the threaded hole. The check ring is fixedly arranged on the screw assembly, located between the movable block and the connecting block and can abut against the connecting block. The screw rod is gradually limited through cooperation of the check ring and the connecting block, it is guaranteed that when the screw rod assembly rotates, the movable block can be pushed to move, the loosening and resetting functions are achieved, pulling-out is convenient, the sliding block is prevented from deflecting when moving, and assembling and disassembling of a PCB or a module are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of locking technology, and specifically to a locking mechanism. Background Technology

[0002] In electronic devices, PCB boards or modules are typically secured within a chassis or enclosure using locking strips. Existing locking strips generally consist of a long bolt threaded through several wedge-shaped blocks. By rotating the bolt, the relative positions of the wedge-shaped blocks and the main body are altered via an inclined plane, increasing the overall height and achieving a locking effect. Some locking strips also employ a serrated structure design, consisting of a screw, a first washer, a front short piece, an upper long piece, a lower long piece, a wire threaded sleeve, a pin, and a second washer. The lower long piece is located below the upper long piece, and there is an overlapping section between them. This overlapping section has a toothed engagement section. The screw connects the first washer, the front short piece, the upper long piece, the lower long piece, and the wire threaded sleeve, while the upper and lower long pieces are connected by a pin. In use, the screw is tightened using a torque wrench, transmitting torque to the front short piece, upper long piece, and lower long piece to provide clamping force. The pin, located within the lower long piece and the U-shaped groove, restricts movement between the profiles, improving thermal conductivity and clamping force. However, with this method, due to the significant interaction force between the upper long piece and the slot over a long period, loosening the locking strip and turning the screw may push the screw axially, causing the upper long piece to remain pressed against the slot. The interaction force between the upper long piece and the slot remains, making it difficult to detach or pull out, affecting the normal use of the locking strip. Furthermore, the front short piece may rotate with the lower long piece when the screw rotates, causing interference between the front short piece and the slot, affecting the loading and unloading of the PCB board or module. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a locking mechanism. By setting a retaining ring on the screw assembly, the axial movement of the screw assembly is limited, ensuring that the screw assembly can push the movable block to move when it rotates, realizing the release and reset function, which is convenient for pulling out. In addition, the fixed block and the sliding block are prevented from deflecting when the sliding block moves by the sliding fit of the T-slot and the T-block, which ensures the loading and unloading of PCB boards or modules.

[0004] This utility model provides a locking mechanism to solve the above-mentioned technical problems, comprising,

[0005] The fixing block has a fixed serrated structure and a connecting block at one end, wherein the connecting block has a mounting groove.

[0006] The movable block has a sliding sawtooth structure that engages with the fixed sawtooth structure, and one end is provided with a threaded hole.

[0007] The connector allows the fixed block and the movable block to be movably connected.

[0008] A pushing component allows the movable block to move relative to the fixed block. The pushing component includes a screw assembly, a sliding block, and a retaining ring. The sliding block is located on the side of the connecting block away from the movable block and is slidably engaged with the connecting block via an inclined surface. The screw assembly movably passes through the sliding block, a mounting groove, and is threadedly connected to the threaded hole. The retaining ring is fixedly disposed on the screw assembly and located between the movable block and the connecting block, and can abut against the connecting block.

[0009] Furthermore, the mounting groove is provided with a stop step that cooperates with the retaining ring on the side near the movable block.

[0010] Furthermore, the connecting block has an upper inclined surface on the side away from the movable block, and the sliding block has a lower inclined surface that cooperates with the upper inclined surface.

[0011] Furthermore, a T-shaped groove is provided on the lower inclined surface, and a T-shaped block is provided on the upper inclined surface that slides in conjunction with the T-shaped groove.

[0012] Furthermore, the connector includes a pin, the fixed block has a sliding hole extending along its axial direction, the movable block has a mounting hole, and the pin moves through the sliding hole and connects with the mounting hole.

[0013] Furthermore, the sliding hole is a stepped hole and is inclined along the slope of the fixed sawtooth structure.

[0014] Furthermore, the screw assembly includes a guide rod and a screw. One end of the guide rod is provided with a turning block, and the other end moves through the light hole and mounting groove on the sliding block and is fixed to the screw. The other end of the screw is connected to a threaded hole.

[0015] Furthermore, a washer is fitted onto the screw assembly, and the washer is located between the sliding block and the turning block.

[0016] Furthermore, a spring washer is also fitted onto the screw assembly, and the spring washer is located between the washer and the screwing block.

[0017] Furthermore, the fixing block is provided with mounting holes.

[0018] The beneficial effects of this utility model are as follows: the fixed serrated structure on the fixed block cooperates with the sliding serrated structure on the movable block. When the fixed block moves in the axial direction, the inclined surface of the sliding serrated structure cooperates with the inclined surface of the sliding serrated structure, increasing the overall height between the fixed block and the movable block, thus pressing against the slot wall for locking. A connecting block is provided at one end of the fixed block, and a mounting groove is provided on the connecting block for mounting the pushing component. A threaded hole is provided at one end of the movable block for threaded connection with the pushing component. The pushing component includes a screw assembly, a sliding block, and a retaining ring. The screw assembly is used to push the movable block to move relative to the fixed block. The sliding block is located on the side of the connecting block away from the movable block and is slidably engaged with the connecting block through an inclined surface. The screw assembly moves through the sliding block, the mounting groove, and is threadedly connected to the threaded hole. When the screw assembly is rotated clockwise, it pushes the sliding block to move upwards along the inclined surface of the connecting block towards the movable block. At the same time, through the threaded engagement of the screw assembly and the threaded hole, it pulls the sliding sawtooth structure on the movable block to move upwards along the inclined surface of the fixed sawtooth on the fixed block towards the sliding block, increasing the overall thickness between the movable block and the fixed block, thus achieving locking. The retaining ring is fixed on the screw assembly and located between the movable block and the connecting block, and can abut against the connecting block. When it is necessary to loosen, the screw assembly is rotated counterclockwise. Due to the large interaction force between the movable block and the slot for a long time, the screw assembly will move away from the movable block first, and at the same time drive the retaining block to move towards the connecting block until the retaining ring abuts against the fixed block. The screw assembly can no longer move. At this time, under the threaded engagement of the screw assembly and the threaded hole, it will push the sliding serrated structure of the sliding block to tilt downwards along the inclined surface of the fixed serrated structure on the fixed block, thereby loosening the module or PCB board.

[0019] This invention utilizes a combination of a fixed sawtooth structure and a sliding sawtooth structure to create multiple contact points in the locking mechanism, resulting in higher clamping reliability, better stability, and a larger contact area, thus improving thermal conductivity. Furthermore, the retaining ring prevents the screw assembly from retracting, facilitating the movement of the movable block and enabling the release and reset function, while also preventing the pushing component from falling off. Additionally, the cooperation between the T-shaped block on the connecting block and the T-shaped groove on the sliding block prevents the sliding block from deflecting during movement. This invention features a simple structure, high reliability, ease of assembly, disassembly, and maintenance, flexible use, and high thermal conductivity.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention in the released state;

[0023] Figure 3 This is a schematic diagram of the structure in the released state of this utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the released state of this utility model;

[0025] Figure 5 This is a structural schematic diagram of the locked state of this utility model.

[0026] In the attached diagram: 1-fixed block, 11-fixed serrated structure, 12-connecting block, 121-upper inclined surface, 122-T-shaped block, 13-mounting groove, 131-stop step, 14-sliding hole, 15-fixed hole, 2-moving block, 21-sliding serrated structure, 22-threaded hole, 23-mounting hole, 3-connector, 4-push component, 41-screw assembly, 411-smooth rod, 412-screw, 413-tightening block, 42-sliding block, 421-lower inclined surface, 422-T-shaped groove, 423-smooth hole, 43-retaining ring, 44-washer, 45-spring washer. Detailed Implementation

[0027] Referring to the accompanying drawings, the specific embodiments of this utility model will be described in detail.

[0028] Reference Figures 1 to 5 This utility model provides a locking mechanism, including a fixed block 1, a movable block 2, a connecting member 3, and a pushing member 4.

[0029] The fixed block 1 has mounting holes 15, through which it is fixed to the module or PCB board. The fixed block 1 has a fixed serrated structure 11 and a connecting block 12 at one end. The connecting block 12 has a mounting groove 13. The movable block 2 has a sliding serrated structure 21 that engages with the fixed serrated structure 11 and a threaded hole 22 at one end. When the sliding serrated structure 21 on the movable block 2 moves upward along the inclined surface of the fixed serrated structure 11 on the fixed block 1, the overall height between the fixed block 1 and the movable block 2 increases, pressing against the slot wall for locking. The connecting block 12 has a mounting groove 13 for mounting the pusher 4, and the threaded hole 22 at one end of the movable block 2 is used for threaded connection with the pusher 4.

[0030] A connector 3 movably connects the fixed block 1 and the movable block 2. Specifically, the connector 3 includes a pin. The fixed block 1 has a sliding hole 14 extending axially, and the movable block 2 has a mounting hole 23. The pin movably passes through the sliding hole 14 and connects with the mounting hole 23. In this case, the pin connects the fixed block 1 and the movable block 2 as a whole through the mounting hole 23 and the sliding hole 14, and the pin can slide within the sliding hole 14, allowing the movable block 2 to move relative to the fixed block 1. Furthermore, the sliding hole 14 is a stepped hole and is inclined along the slope of the fixed sawtooth structure 11. The stepped hole allows the pin to be engaged on the step and will not detach from the fixed block 1. The inclined sliding hole 14 accommodates the movement of the movable block 2 on the fixed block 1, preventing the pin from jamming the movable block 2, and allows the sliding hole 14 to accommodate the pin.

[0031] The pusher 4 allows the movable block 2 to move relative to the fixed block 1. The pusher 4 includes a screw assembly 41, a sliding block 42, and a retaining ring 43. The screw assembly 41 is used to push the movable block 2 to move relative to the fixed block 1.

[0032] The sliding block 42 is located on the side of the connecting block 12 away from the movable block 2 and is slidably engaged with the connecting block 12 via an inclined surface. Specifically, the connecting block 12 has an upper inclined surface 121 on the side away from the movable block 2, and the sliding block 42 has a lower inclined surface 421 that engages with the upper inclined surface 121. At this time, the upper inclined surface 121 and the lower inclined surface 421 are engaged, and the sliding block 42 moves along the inclined direction of the upper inclined surface 121. Further, the lower inclined surface 421 has a T-shaped groove 422, and the upper inclined surface 121 has a T-shaped block 122 that slidably engages with the T-shaped groove 422. The engagement of the T-shaped block 122 and the T-shaped groove 422 prevents the sliding block 42 from deflecting during movement.

[0033] The screw assembly 41 movably passes through the sliding block 42 and the mounting groove 13 and is threadedly connected to the threaded hole 22. Specifically, the screw assembly 41 includes a smooth rod 411 and a screw 412. One end of the smooth rod 411 is provided with a turning block 413, and the end of the turning block 413 is provided with a polygonal turning groove. The screw assembly 41 can be easily turned by inserting a tool into the polygonal turning groove. The other end of the smooth rod 411 movably passes through the smooth hole 423 on the sliding block 42 and the mounting groove 13 and is fixed to the screw 412. The other end of the screw 412 is connected to the threaded hole 22. At this time, the sliding block 42 and the smooth rod 411 are in sliding engagement, and rotating the screw assembly 41 will not cause the sliding block 42 to rotate.

[0034] The retaining ring 43 is fixedly mounted on the screw assembly 41 and located between the movable block 2 and the connecting block 12, and can abut against the connecting block 12. When the retaining ring 43 abuts against the connecting block 12, it can prevent the screw assembly 41 from retracting. This not only pushes the movable block 2 downwards along the inclined surface of the fixed sawtooth structure 11 during the loosening process, but also prevents the screw assembly 41 from falling off. Furthermore, the mounting groove 13 has a stop step 131 on the side near the movable block 2 that cooperates with the retaining ring 43. When the retaining ring 43 moves to the stop step 131, the stop step 131 limits the screw assembly 41, preventing the screw assembly 41 from moving further towards the connecting block 12.

[0035] Furthermore, a washer 44 is fitted onto the screw assembly 41, located between the sliding block 42 and the turning block 413, serving to prevent slippage. Even further, a spring washer 45 is also fitted onto the screw assembly 41, located between the washer 44 and the turning block 413, preventing loosening and providing preload to the sliding block 42.

[0036] When locking is required, rotating the screw assembly 41 clockwise pushes the sliding block 42 to move upwards along the inclined plane of the connecting block 12 towards the movable block 2. At the same time, through the threaded engagement of the screw assembly 41 and the threaded hole 22, the sliding sawtooth structure 21 on the movable block 2 is pulled to move upwards along the inclined plane of the fixed sawtooth on the fixed block 1 towards the sliding block 42, increasing the overall thickness between the movable block 2 and the fixed block 1, thereby achieving locking.

[0037] When unlocking is required, the screw assembly 41 is rotated counterclockwise. Due to the large interaction force between the movable block 2 and the slot over a long period of time, the screw assembly 41 moves away from the movable block 2 first, and at the same time drives the stop block to move towards the connecting block 12 until the retaining ring 43 abuts against the fixed block 1. The screw assembly 41 can no longer move. At this time, the screw assembly 41 and the threaded hole 22 will push the sliding serrated structure 21 of the sliding block 42 to move downward along the inclined surface of the fixed serrated structure 11 on the fixed block 1, thereby releasing the module or PCB board.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A locking mechanism, characterized in that The utility model relates to a kind of sawing machine, including, Fixed block (1), with fixed sawtooth structure (11) and one end is equipped with connecting block (12), the connecting block (12) is equipped with installation slot (13), Movable block (2), with the sliding sawtooth structure (21) of the fixed sawtooth structure (11) is engaged and one end is equipped with threaded hole (22), Connecting piece (3), fixed block (1) and movable block (2) are connected, Pushing piece (4), movable block (2) can be moved relative to fixed block (1), the pushing piece (4) includes screw rod assembly (41), sliding block (42) and baffle ring (43), the sliding block (42) is located on the side of the connecting block (12) away from movable block (2) and is cooperated with the connecting block (12) by inclined surface sliding, the screw rod assembly (41) is slidably arranged through the sliding block (42), installation slot (13) is connected with threaded hole (22) by screwing, the baffle ring (43) is fixed on the screw rod assembly (41) and is located between movable block (2) and connecting block (12) and can be abutted with the connecting block (12).

2. The locking mechanism of claim 1, wherein, The installation slot (13) is equipped with the stop step (131) matched with the baffle ring (43) on the side close to movable block (2).

3. The locking mechanism of claim 1, wherein, The connecting block (12) is equipped with upper inclined surface (121) on the side away from movable block (2), and the sliding block (42) is equipped with lower inclined surface (421) matched with the upper inclined surface (121).

4. The locking mechanism of claim 3, wherein, The lower inclined surface (421) is equipped with T-shaped groove (422), and the upper inclined surface (121) is equipped with T-shaped block (122) slidably matched with the T-shaped groove (422).

5. The locking mechanism of claim 1, wherein, The connecting piece (3) includes a pin, the fixed block (1) is equipped with sliding hole (14) extending along its axial direction, the movable block (2) is equipped with mounting hole (23), and the pin is slidably connected through the sliding hole (14) and the mounting hole (23).

6. The locking mechanism of claim 5, wherein, The sliding hole (14) is a stepped hole and is inclinedly arranged along the inclined surface of the fixed sawtooth structure (11).

7. The locking mechanism of claim 1, wherein, The screw rod assembly (41) includes a polished rod (411) and a screw rod (412), one end of the polished rod (411) is equipped with a twisting block (413), the other end is slidably arranged through the light hole (423) in the sliding block (42) and the installation slot (13) and fixed with the screw rod (412), and the other end of the screw rod (412) is connected with the threaded hole (22).

8. The locking mechanism of claim 7, wherein, A washer (44) is sleeved on the screw rod assembly (41), and the washer (44) is located between the sliding block (42) and the twisting block (413).

9. The locking mechanism of claim 8, wherein, A spring pad (45) is also sleeved on the screw rod assembly (41), and the spring pad (45) is located between the washer (44) and the twisting block (413).

10. The locking mechanism of claim 1, wherein, The fixed block (1) is equipped with mounting fixed hole (15).

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