Plastic part with quick snap structure

Abstract

The utility model relates to mechanical connection technical field discloses a plastic part with quick clamping structure. Plastic part includes plastic part main part, joint shell, built -in quick clamping mechanism and outside anti -misoperation lock mechanism, quick clamping mechanism includes pull rod, locking block, expansion cavity, locating tenon, spring and axle seat, pull rod connects locking block, is under the spring reset action, and pull rod drives locking block to rotate between the inclination and horizontal state to cooperate locating tenon and realizes the clamping, and anti -misoperation lock mechanism includes the locking ring and fastening bolt of sliding installation in the sliding slot, and the locking ring is through the sliding sleeve joint in pull rod and is fastened by bolt to restrict pull rod vertical displacement. The utility model discloses through pull rod drive cooperation spring reset realizes quick dismounting, utilizes locking ring physical position to prevent accidental touch unlocking, has the beneficial effect of high connecting efficiency, good stability and anti -misoperation.

Description

Technical Field

[0001] This utility model relates to the field of mechanical connection technology, and in particular to a plastic part with a quick-connect structure. Background Technology

[0002] In modern industrial manufacturing and electronic equipment assembly, plastic parts are widely used due to their light weight, ease of molding, and good insulation properties. To fix and assemble different plastic components, connection structures are typically required. Traditional plastic part connections mainly rely on metal screws for fastening. While this method provides high connection strength and stability, in practice, tightening and loosening screws is cumbersome, often requiring screwdrivers and other auxiliary tools, which is time-consuming and labor-intensive. For scenarios requiring frequent disassembly and maintenance, battery replacement, or modular assembly, the inefficiency of screw connections is clearly insufficient to meet the demands of rapid operations.

[0003] To address the issue of assembly and disassembly efficiency, existing technologies have developed connection structures that utilize the inherent elasticity of plastics or simple snap-fit ​​principles. While these structures achieve tool-free installation to some extent, their connection reliability is often insufficient. On one hand, simple elastic snaps are prone to material fatigue and reduced locking force after prolonged use or frequent insertion and removal. On the other hand, and more critically, existing quick-connect structures typically lack robust anti-accidental contact or secondary locking mechanisms. In actual use, if an operator accidentally touches the unlocking component, or if the equipment is subjected to external vibration or pressure, the snap-fit ​​structure can easily become loose, leading to connection failure or even equipment damage.

[0004] In summary, existing plastic component connection technologies, while prioritizing ease of operation, struggle to balance connection safety and prevention of accidental unlocking. Designing a connection structure that enables quick and effortless engagement and disengagement through simple operation, while also providing effective physical restraints to prevent accidental unlocking, has become a pressing technical challenge in this field.

[0005] Therefore, this utility model proposes a plastic part with a quick-connect structure to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in the plastic parts connection structure, such as cumbersome operation, low disassembly and assembly efficiency, or the lack of an effective secondary locking mechanism when using simple snap-fit ​​connection, which leads to easy mis-locking when subjected to vibration or accidental touch, poor connection stability and low reliability, this utility model aims to provide a plastic parts with a quick snap-fit ​​structure that has an improved structure and combines quick operation and anti-accidental touch locking functions.

[0007] This utility model provides a plastic part with a quick-connect structure, including: a plastic part body, a plastic part connector shell connected to the plastic part body, a quick-connect mechanism installed in the plastic part connector shell, and an anti-accidental unlocking mechanism installed on the plastic part connector shell.

[0008] The quick-connect mechanism specifically includes a pull rod, a locking block, an expansion cavity, a positioning tenon, a spring, a shaft seat, and a tenon groove. The positioning tenon is located at the front end of the plastic part connector housing, and the tenon groove is formed on the plastic part connector housing. The expansion cavity is located inside the plastic part connector housing, and the locking block is rotatably connected to the expansion cavity. The pull rod is connected to the locking block. The upper end of the spring is rotatably connected to the pull rod, and the lower end is rotatably connected to the plastic part connector housing via the shaft seat.

[0009] Furthermore, the anti-accidental unlocking mechanism includes a locking ring, a sliding groove, a connecting block, and a fastening bolt; the sliding groove is formed on the outer shell of the plastic part connector, and the locking ring is slidably installed in the sliding groove; the fastening bolt is installed through the connecting block, and the locking ring is connected to the fastening bolt; the locking ring is configured to be sleeved on the pull rod by sliding, thereby limiting the displacement of the pull rod by physical limiting.

[0010] Preferably, the locking block has a semi-circular cylindrical structure, and the locking block is configured to be able to rotate from an initial state of horizontal inclination to a horizontal state under the action of the pull rod, and when rotated to the horizontal direction, the diameter plane of the locking block and the bottom of the positioning tenon are on the same horizontal plane, thereby forming an avoidance channel.

[0011] Preferably, in the snap-fit ​​state, the locking block can form a complete cylindrical structure with the corresponding locking block in another mating plastic part, and the mating edge of the locking block forms an inclined fit with the lower edge of the positioning tenon to enhance the tightness of the snap-fit.

[0012] Preferably, the spring is configured to return to its original position using its own elasticity when the operator releases the lever, and drive the lever to move, thereby causing the locking block to rotate back to its initial state, so as to ensure that the two plastic parts can maintain the snap-locked state.

[0013] Preferably, the positioning tenon is configured to be inserted into the mortise of another mating plastic part, for preliminary positioning and guidance of the two plastic parts before the snap-fit ​​action begins, to prevent misalignment during installation.

[0014] Preferably, the anti-accidental unlocking mechanism is configured to lock the pull rod by sliding the locking ring along the groove so that it fits onto the pull rod, and by tightening the fastening bolt to increase friction, thereby locking the pull rod and preventing accidental pulling.

[0015] Preferably, the fastening bolt is configured to allow the locking ring to slide freely along the groove and slide off the pull rod when loosened, thereby releasing the restriction on the pull rod and facilitating normal unlocking operations.

[0016] Preferably, the connecting block serves as the mounting carrier for the fastening bolt, and is fixed to the inner side of the locking ring. By tightening the fastening bolt, the locking ring connected to the fastening bolt is pressed and fixed, making it difficult to be pulled by external force.

[0017] Preferably, the front end of the plastic connector housing has an opening for accommodating the mating part, and the positioning tenon and the mortise are located at a relative or adjacent position at the front end of the plastic connector housing to accommodate the plug-in connection requirements.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model solves the problem that existing plastic part connections usually rely on screw fastening, resulting in low assembly and disassembly efficiency, cumbersome operation, and difficulty in achieving tool-free quick maintenance. It achieves the technical effect of quickly connecting and separating two plastic parts by simply pulling and releasing the pull rod, significantly improving assembly efficiency and ensuring connection firmness.

[0020] 2. This utility model solves the problem that traditional quick-connect structures are prone to accidental loosening and insufficient connection reliability when subjected to external vibration, compression or accidental contact with the pull rod. It achieves the technical effect of secondary safety locking of the pull rod, effectively preventing accidental unlocking, and ensuring the connection stability and safety of plastic parts in complex environments.

[0021] 3. This utility model solves the problems of misalignment, difficulty in blind operation, and damage to internal locking components caused by forced misalignment during the docking process of plastic parts by setting a positioning tenon with guiding function and a matching tenon groove structure at the front end of the connector shell. It achieves the technical effects of providing accurate preliminary positioning and guidance before locking, ensuring precise fit between the locking block and the mating surface, reducing the difficulty of operation, and extending the service life of the device. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a plastic part with a quick-connect structure proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the positioning tenon of a plastic part with a quick-connect structure proposed in this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of a pull rod with a quick-connect structure for a plastic part proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of a locking block for a plastic part with a quick-connect structure proposed in this utility model;

[0026] Figure 5 This is a schematic diagram of the connecting block of a plastic part with a quick-connect structure proposed in this utility model.

[0027] Legend:

[0028] 1. Plastic body; 2. Plastic connector shell; 3. Quick-connect mechanism; 31. Pull rod; 32. Locking block; 33. Expansion chamber; 34. Positioning tenon; 35. Spring; 36. Shaft seat; 37. Tenon groove; 4. Anti-accidental unlocking mechanism; 41. Locking ring; 42. Slide groove; 43. Connecting block; 44. Fastening bolt. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Example:

[0031] Reference Figures 1 to 5 This utility model provides a plastic part with a quick-connect structure, which aims to solve the problems of low connection efficiency, difficult disassembly, and insufficient connection reliability caused by the lack of an effective anti-accidental contact mechanism in the prior art.

[0032] The plastic part with a quick-connect structure includes a plastic part body 1 and a plastic part connector shell 2 fixedly connected to the plastic part body 1. The plastic part body 1 serves as the mounting base and functional load-bearing body of the entire device, supporting the overall structure and providing a connection base. The plastic part connector shell 2 is constructed as a hollow shell structure to accommodate internal mechanical components and protect the core mechanism from external interference.

[0033] The plastic connector housing 2 is equipped with a quick-locking mechanism 3, which is used to achieve quick mechanical engagement and disengagement between two plastic parts. The plastic connector housing 2 is also equipped with an anti-accidental unlocking mechanism 4, which is used to physically limit the unlocking component after the engagement is completed to prevent connection failure due to accidental contact.

[0034] The quick-connect mechanism 3 mainly consists of a pull rod 31, a locking block 32, an expansion cavity 33, a positioning tenon 34, a spring 35, a shaft seat 36, and a tenon 37. These components together constitute a linkage locking device with an automatic reset function. The positioning tenon 34 is integrally formed at the front end of the plastic part connector shell 2 and is used to provide insertion guidance and initial positioning when two plastic parts are joined. The tenon 37 is opened on the plastic part connector shell 2 and its position corresponds to the positioning tenon 34. It is used to accommodate the positioning tenon 34 on the mating part. The expansion cavity 33 is set in the inner wall of the plastic part connector shell 2 as an internal accommodating space and is used to provide a space for the rotation of the locking block 32.

[0035] The anti-accidental unlocking mechanism 4 mainly consists of a locking ring 41, a slide groove 42, a connecting block 43, and a fastening bolt 44. The slide groove 42 is opened horizontally on the outer side wall of the plastic part connector housing 2 to provide a moving track for the locking assembly. The locking ring 41 is slidably installed in the slide groove 42 and is used to engage the pull rod 31 in the locked position to limit its movement. The connecting block 43 and the fastening bolt 44 are used to fix the position of the locking ring 41.

[0036] The locking block 32 has a semi-circular cylindrical geometry with a flat cut surface and an arc-shaped locking surface. The locking block 32 is rotatably connected to the internal space of the expansion cavity 33. Its function is to act as a locking actuator, changing its spatial position through its own rotation, thereby blocking or avoiding the mating parts. One end of the pull rod 31 passes through the side wall of the expansion cavity 33 and is fixedly connected to the flat cut surface of the locking block 32 or its rotation axis. The pull rod 31 extends to the outside of the plastic part connector housing 2 in an L-shape or bend shape, serving as an operating handle for the user to apply force. In the assembled state, the pull rod 31 is configured to swing around the rotation center of the locking block 32, thereby driving the locking block 32 to rotate synchronously.

[0037] When in a horizontal state, the diameter plane of the locking block 32 is on the same horizontal plane as the bottom of the positioning tenon 34. At this time, the locking block 32 avoids the mating channel, allowing the positioning tenon 34 to freely enter and exit the mortise 37. When in the initial state, the arc surface of the locking block 32 protrudes from the expansion cavity 33 and extends above the mortise 37, interfering with the mating parts and locking them. The spring 35 is set in the inner cavity of the plastic part connector housing 2. The upper end of the spring 35 is rotatably connected to the middle or side wall of the pull rod 31, and the lower end is rotatably connected to the inner bottom wall of the plastic part connector housing 2 through the bearing seat 36. The bearing seat 36 is fixedly installed at the bottom of the housing, providing a stable support point for the spring 35.

[0038] The spring 35 reset mechanism ensures that the pull rod 31 is always pushed by the spring 35 and remains in the initial position without external force, thereby forcing the locking block 32 to remain in the inclined locking state. When the two plastic parts are connected, the locking block 32 automatically resets under the action of the elastic force. Its arc surface and the corresponding structure on the mating part form a complete cylindrical shape, and its mating edge forms an inclined abutment with the lower edge of the positioning tenon 34, thereby firmly locking the two plastic parts together and preventing them from being easily pulled out.

[0039] In a preferred embodiment, the anti-accidental unlocking mechanism 4 is arranged on the side wall of the plastic part connector housing 2. A groove 42 is horizontally formed on the outer surface of the plastic part connector housing 2. The locking ring 41 is a hollow rectangular frame structure, slidably fitted inside the groove 42. The locking ring 41 is configured to slide along the groove 42 and be sleeved on the end of the pull rod 31 extending out of the plastic part connector housing 2. It restricts the vertical displacement of the pull rod 31 through physical blocking and limiting. A connecting block 43 is fixedly connected to the inner side wall of the locking ring 41. The connecting block 43 has a threaded through hole, and a fastening bolt 4... 4. The threaded connection is made in the threaded through hole of the connecting block 43. The end of the fastening bolt 44 is configured to abut against the outer wall of the plastic part connector housing 2. The top pressure generated by tightening the fastening bolt 44 increases the friction, thereby fixing the locking ring 41 in the locking position covering the pull rod 31 or the unlocking position away from the pull rod 31. The positioning tenon 34 is designed as a trapezoidal boss structure. The top of the positioning tenon 34 is provided with a guide slope. The guide slope is used to guide the insertion direction during the docking process. The bottom end of the positioning tenon 34 and the bottom surface of the mortise 37 are at the same horizontal level to ensure the flatness and fit of the overall structure after insertion.

[0040] The pull rod 31 includes a connecting section and a handle section. The connecting section passes through the expansion cavity 33 and is fixedly connected to the locking block 32. The handle section is bent at an obtuse angle or a right angle with the connecting section. The handle section is located outside the plastic part connector housing 2 for hand operation. The bearing seat 36 is fixed to the bottom wall of the housing in a U-shaped or grooved structure. The second end of the spring 35 is rotatably installed in the groove of the bearing seat 36 through a pin. The spring 35 is a cylindrical helical compression spring 35 to ensure that the pull rod 31 is provided with a continuous and stable return force.

[0041] The implementation principle of this application embodiment is as follows: the device mainly consists of a plastic body 1, a plastic connector shell 2 connected to the plastic body 1, and a quick-locking mechanism 3 installed in the plastic connector shell 2. An anti-accidental unlocking mechanism 4 is installed on the plastic connector shell 2 to prevent accidental unlocking.

[0042] First, when the operator performs the operation to snap the two plastic parts together, the operator first uses the positioning tenon 34 designed at the front end of the plastic part connector shell 2 to perform preliminary positioning and guidance of the snap-fit, inserting the positioning tenon 34 of one plastic part into the tenon 37 of the other plastic part, so that the two plastic parts are initially joined together.

[0043] Then, the operator pulls the lever 31 to rotate the locking block 32 connected to the lever 31 and rotatably connected to the expansion cavity 33, so that it rotates from an initial horizontally inclined semi-circular cylinder to a horizontal one with its diameter on the same horizontal plane as the bottom of the positioning tenon 34. At this time, the operator pushes the two plastic parts further to connect them together. Then, the operator releases the lever 31, so that the spring 35, which is rotatably connected to the lever 31 at the upper end and rotatably connected to the plastic part connector housing 2 at the lower end through the bearing 36, returns to its original position. This causes the lever 31 to rotate the locking block 32 back to its initial state. The locking blocks 32 in the two plastic parts form a complete cylinder with its mating edge inclined to the lower edge of the positioning tenon 34, making the two plastic parts stuck together and difficult to pull out, achieving a quick snap-fit ​​effect for the two plastic parts.

[0044] Secondly, to prevent accidental unlocking of the quick-release mechanism 3, the operator uses the anti-accidental unlocking mechanism 4 to restrict the pull rod 31 in the quick-release mechanism 3, making it difficult to pull up. The operator first slides the locking ring 41, which is slidably installed in the slide groove 42, so that it fits onto the pull rod 31. Then, the operator tightens the fastening bolt 44, which is inserted into the connecting block 43, fixing the locking ring 41 on the fastening bolt 44 and making it difficult to pull. This completes the locking of the pull rod 31, achieving the effect of preventing the quick-release mechanism from being unlocked due to accidental pulling of the pull rod 31.

[0045] Finally, when the operator needs to unlock, the operator will loosen the bolt 44, allowing the locking ring 41 to slide. The operator slides the locking ring 41 so that it slides off the pull rod 31. At this time, the operator pulls the pull rod 31 on the two plastic parts, causing the locking block 32 connected to the pull rod 31 to rotate. The diameter of the locking block 32 rotates to the horizontal direction, and its bottom is on the same horizontal plane as the lower end of the positioning tenon 34. At this time, the operator can release the two plastic parts from the jamming, allowing the positioning tenon 34 to slide out of the mortise 37, thus completing the release of the two plastic parts from the jamming.

[0046] Finally, it should be noted that the above description is only 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 plastic part with a quick-connect structure, characterized in that, It includes a plastic body (1), a plastic connector shell (2) connected to the plastic body (1), a quick-locking mechanism (3) installed in the plastic connector shell (2), and an anti-accidental unlocking mechanism (4) installed on the plastic connector shell (2). The quick-connect mechanism (3) includes a pull rod (31), a locking block (32), an expansion cavity (33), a positioning tenon (34), a spring (35), a bearing seat (36), and a tenon (37). The positioning tenon (34) is located at the front end of the plastic part connector shell (2), and the tenon (37) is opened on the plastic part connector shell (2). The expansion cavity (33) is located inside the plastic part connector shell (2). The locking block (32) is rotatably connected to the expansion cavity (33). The pull rod (31) is connected to the locking block (32). The upper end of the spring (35) is rotatably connected to the pull rod (31), and the lower end is rotatably connected to the plastic part connector shell (2) through the bearing seat (36).

2. The plastic part with a quick-connect structure according to claim 1, characterized in that, The anti-accidental unlocking mechanism (4) includes a locking ring (41), a slide groove (42), a connecting block (43), and a fastening bolt (44). The slide groove (42) is opened on the plastic part connector shell (2). The locking ring (41) is slidably installed in the slide groove (42). The fastening bolt (44) is installed through the connecting block (43). The locking ring (41) is connected to the fastening bolt (44). The locking ring (41) is configured to slide on the pull rod (31) to limit the displacement of the pull rod (31). The locking block (32) has a semi-circular cylindrical structure. The locking block (32) is configured to rotate from an initial state of horizontal inclination to a horizontal state under the action of the pull rod (31), and in the horizontal direction, the diameter of the locking block (32) and the bottom of the positioning tenon (34) are on the same horizontal plane.

3. The plastic part with a quick-connect structure according to claim 2, characterized in that, The locking block (32) is configured to form a complete cylinder with the locking block (32) in another plastic part when in a snap-fit ​​state, and the mating edge of the locking block (32) forms an inclined fit with the lower edge of the positioning tenon (34).

4. The plastic part with a quick-connect structure according to claim 1, characterized in that, The spring (35) is configured to reset when the pull rod (31) is released and drive the pull rod (31) to rotate the locking block (32) back to its initial state so that the two plastic parts are snapped together.

5. The plastic part with a quick-connect structure according to claim 1, characterized in that, The positioning tenon (34) is configured to insert into the mortise (37) of another plastic part to provide initial positioning and guidance for the snap-fit.

6. The plastic part with a quick-connect structure according to claim 2, characterized in that, The anti-accidental unlocking mechanism (4) is configured to lock the pull rod (31) by sliding the locking ring (41) onto the pull rod (31) and fixing the locking ring (41) by tightening the fastening bolt (44).

7. The plastic part with a quick-connect structure according to claim 2, characterized in that, The fastening bolt (44) is configured to allow the locking ring (41) to slide along the groove (42) and slide off the pull rod (31) in the loosened state, so as to release the restriction on the pull rod (31).

8. The plastic part with a quick-connect structure according to claim 2, characterized in that, The connecting block (43) serves as the mounting carrier for the fastening bolt (44) and is configured to make it difficult to pull the locking ring (41) connected to the fastening bolt (44) by tightening the fastening bolt (44).

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