A plastic covered latch

Abstract

The utility model discloses a kind of plastic-coated latches, including lock catch mechanism and reinforcing mechanism, the lock catch mechanism includes bottom plate, the shell cover being connected with the top of the bottom plate, the spring being fixedly connected in the shell cover inside, the clasp strip being connected with the outer end of the spring, the clasp strip is slidably installed between bottom plate and shell cover. In the utility model, circular groove, through hole, square hole are opened on bottom plate in advance, then stripe groove, through hole are opened on shell cover, finally spray adhesion accelerator, plastic melt can be injected on shell cover, melt fills stripe groove, through hole, circular groove, through hole and square hole one by one, then form firm mechanical occlusion after cooling, significantly improve anti-peeling, anti-twist capacity, then the cladding layer of cooling molding, with the help of adhesion accelerator, the chemical bonding force of reinforced plastic and metal, effectively improve the stability of cladding layer, guarantee the service life of latch.

Description

Technical Field

[0001] This utility model relates to the field of latching technology, specifically a plastic-coated latch. Background Technology

[0002] A plastic-coated latch is a locking device manufactured through insert injection molding or secondary injection molding processes. Its core involves placing a metal frame (or a high-strength engineering plastic frame) as an insert into a mold, and then injection molding one or more layers of plastic over the frame to form an integrated functional structure.

[0003] In traditional latches, the plastic layer is prone to loosening, cracking, or even falling off under long-term stress or thermal cycling. The instability of the plastic layer directly affects the latch's aesthetics, user comfort, and lifespan. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A plastic-coated latch includes a locking mechanism and a reinforcing mechanism. The locking mechanism includes a base plate, a housing connected to the top of the base plate, a spring fixed inside the housing, and a fastener connected to the outer end of the spring. The fastener is slidably installed between the base plate and the housing. The reinforcing mechanism includes multiple striped grooves and multiple through holes on the outer surface of the housing, multiple circular grooves on the top of the base plate, four through openings on the base plate, four square openings on the bottom of the base plate, an adhesive promoter sprayed on the surface of the housing, and a coating layer wrapped around the outer surface of the housing.

[0007] By adopting the above technical solution, circular grooves, through holes, and square openings are pre-made on the base plate, and striped grooves and through holes are made on the shell. Finally, an adhesive accelerator is sprayed on, and plastic melt is injected into the shell. The melt fills the striped grooves, through holes, circular grooves, through holes, and square openings one by one. After cooling, a strong mechanical bond is formed, which significantly improves the resistance to peeling and torsion. The cooled and formed coating layer, with the help of the adhesive accelerator, enhances the chemical bonding force between the plastic and the metal, effectively improves the stability of the coating layer, and ensures the service life of the latch.

[0008] In a preferred embodiment, the present invention can be further configured such that the inner end of the buckle is a rectangular surface, and the spring is located at the center of the rectangular surface.

[0009] In a preferred embodiment, the present invention can be further configured such that: a protruding rod is fixedly connected to the top of the buckle, and a sliding opening suitable for the sliding of the protruding rod is provided on the housing.

[0010] In a preferred embodiment, the present invention can be further configured such that: the covering layer has an opening suitable for the sliding of the protrusion, and the opening coincides with the sliding opening.

[0011] In a preferred embodiment, the present invention can be further configured such that: multiple circular grooves are located at the bottom of multiple through holes, and the interior of the through holes is connected to the interior of the circular grooves.

[0012] In a preferred embodiment, the present invention can be further configured such that: four square openings are located at the bottom of four through openings, and the interior of the through openings is connected to the interior of the square openings.

[0013] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0014] In this invention, circular grooves, through holes, and square openings are pre-made on the base plate, and striped grooves and through holes are made on the housing. Finally, an adhesive accelerator is sprayed on, and then molten plastic is injected into the housing. The molten plastic fills the striped grooves, through holes, circular grooves, through holes, and square openings one by one. After cooling, a strong mechanical interlock is formed, which significantly improves the resistance to peeling and torsion. The cooled and formed coating layer, with the help of the adhesive accelerator, enhances the chemical bonding force between the plastic and the metal, effectively improves the stability of the coating layer, and ensures the service life of the latch. Attached Figure Description

[0015] Figure 1 This is a perspective view of the overall structure of this utility model;

[0016] Figure 2 This is an exploded view of the overall structure of this utility model;

[0017] Figure 3 This is a perspective view of the casing of this utility model;

[0018] Figure 4 This is a top view of the base plate of this utility model;

[0019] Figure 5 This is a bottom view of the base plate of this utility model.

[0020] Figure label:

[0021] 100. Locking mechanism; 110. Base plate; 120. Housing; 130. Spring; 140. Fastener strip;

[0022] 200, Reinforcing mechanism; 210, Striped groove; 220, Through hole; 230, Round groove; 240, Through opening; 250, Square opening; 260, Adhesion accelerator; 270, Coating layer. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0024] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0025] The following describes, with reference to the accompanying drawings, some embodiments of the present invention providing a plastic-coated latch.

[0026] Example 1:

[0027] Combination Figure 1-5 As shown, the present invention provides a plastic-coated latch, including a locking mechanism 100 and a reinforcing mechanism 200. The locking mechanism 100 includes a base plate 110, a housing 120 connected to the top of the base plate 110, a spring 130 fixed inside the housing 120, and a fastener 140 connected to the outer end of the spring 130. The fastener 140 is slidably installed between the base plate 110 and the housing 120.

[0028] The reinforcing mechanism 200 includes multiple striped grooves 210 and multiple through holes 220 formed on the outer surface of the housing 120, multiple circular grooves 230 formed on the top of the base plate 110, four through holes 240 formed on the base plate 110, four square openings 250 formed on the bottom of the base plate 110, an adhesive accelerator 260 sprayed on the surface of the housing 120, and a covering layer 270 wrapped around the outer surface of the housing 120.

[0029] Furthermore, multiple circular grooves 230 are located at the bottom of multiple through holes 220, and the interior of the through holes 220 is connected to the interior of the circular grooves 230. The layout design of the circular grooves 230 and the through holes 220 allows the plastic melt to enter the circular grooves 230 after flowing through the through holes 220. This can increase the contact area between the coating layer 270 and the base plate 110, improve the installation firmness of the coating layer 270, and ensure the structural stability of the locking mechanism 100.

[0030] Furthermore, the four square openings 250 are located at the bottom of the four through openings 240 respectively. The interior of the through openings 240 is connected to the interior of the square openings 250. The layout design of the square openings 250 and the through openings 240 allows the plastic melt to fill the square openings 250 after flowing through the through openings 240. After cooling, it can form a snap-fit ​​structure with the base plate 110, making the covering layer 270 more firmly installed.

[0031] Example 2:

[0032] Combination Figure 2As shown, based on Embodiment 1, the inner end of the buckle 140 is set as a rectangular surface, and the spring 130 is located at the center of the rectangular surface. The layout design of the spring 130 ensures that when it pushes the buckle 140, the buckle 140 will not get stuck between the base plate 110 and the shell 120.

[0033] Example 3:

[0034] Combination Figure 1-3 As shown, in the above embodiment, a protruding rod is fixedly connected to the top of the buckle 140, and a sliding opening suitable for the sliding of the protruding rod is provided on the housing 120. The protruding rod can limit the displacement of the buckle 140 and prevent the buckle 140 from coming out of the housing 120.

[0035] Furthermore, the covering layer 270 is provided with an opening suitable for the sliding of the protruding rod. The opening coincides with the sliding opening. The opening is provided to ensure that the covering layer 270 will not affect the movement of the fastener 140.

[0036] The working principle and usage process of this utility model are as follows: In the plastic coating process, a circular groove 230, a through-hole 240, and a square opening 250 are pre-made on the base plate 110. Then, a striped groove 210 and a through hole 220 are made on the shell 120. Finally, an adhesive accelerator 260 is sprayed on the shell 120. Plastic melt is then injected into the shell 120. The melt fills the striped groove 210, through hole 220, circular groove 230, through-hole 240, and square opening 250 one by one. After cooling, a strong mechanical interlock is formed, which significantly improves the anti-peeling and anti-torsion ability. The coating layer 270, which is then cooled and formed, enhances the chemical bonding force between the plastic and the metal with the help of the adhesive accelerator 260, effectively improving the stability of the coating layer 270 and ensuring the service life of the latch.

[0037] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A plastic-coated latch, characterized in that, include: The locking mechanism (100) includes a base plate (110), a housing (120) connected to the top of the base plate (110), a spring (130) fixed inside the housing (120), and a buckle (140) connected to the outer end of the spring (130). The buckle (140) is slidably installed between the base plate (110) and the housing (120). The reinforcing mechanism (200) includes a plurality of striped grooves (210) and a plurality of through holes (220) on the outer surface of the housing (120), a plurality of circular grooves (230) on the top of the base plate (110), four through holes (240) on the base plate (110), four square openings (250) on the bottom of the base plate (110), an adhesive accelerator (260) sprayed on the surface of the housing (120), and a covering layer (270) wrapped around the outer surface of the housing (120).

2. The plastic-coated latch according to claim 1, characterized in that, The inner end of the buckle (140) is set as a rectangular surface, and the spring (130) is located at the center of the rectangular surface.

3. The plastic-coated latch according to claim 1, characterized in that, The top of the buckle (140) is fixedly connected to a protruding rod, and the sleeve (120) is provided with a sliding opening suitable for the sliding of the protruding rod.

4. A plastic-coated latch according to claim 2, characterized in that, The covering layer (270) has an opening suitable for sliding of the protruding rod, and the opening coincides with the sliding opening.

5. A plastic-coated latch according to claim 1, characterized in that, Multiple circular grooves (230) are located at the bottom of multiple through holes (220), and the interior of the through holes (220) is connected to the interior of the circular grooves (230).

6. A plastic-coated latch according to claim 1, characterized in that, The four square openings (250) are located at the bottom of the four through openings (240), and the interior of the through openings (240) is connected to the interior of the square openings (250).

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