86 cassette dustproof cover plate
The design of the elastic fastener and the junction box snapping together solves the problems of inconvenient installation and poor dust prevention of existing dust cover plates, and achieves convenient installation and effective dust prevention.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG TONGZHENG PIPE TECH
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-15
AI Technical Summary
Existing dust covers are mostly fixed with screws, which are inconvenient to install and easy to fall off. They cannot effectively prevent fine dust from entering the junction box, posing a safety hazard.
The design uses elastic fasteners to snap into the junction box. Through raised ribs and gap fit, it can be fixed without screws. Combined with the edge structure, it prevents the cover from opening and ensures dustproof effect.
It achieves convenient installation and good dust prevention, avoiding the inconvenience of installation and dust ingress caused by screw fixing.
Smart Images

Figure CN224249308U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cover technology, specifically relating to an 86-type dark box dustproof cover. Background Technology
[0002] In the field of building electrical installation, the 86-type junction box is a common type of pre-embedded junction box, widely used for leading wires out of walls and installing electrical switches and sockets. To prevent dust, cement, and other foreign objects from entering the junction box during construction and affecting the normal installation and safe use of electrical equipment later, a dust cover is usually installed on the outside of the junction box. However, most existing dust covers are fixed with screws, which is inconvenient to install, and covers without screw holes on the market are easy to open, causing them to fall off during construction or failing to effectively prevent fine dust from entering the box, posing a potential hazard for subsequent use.
[0003] Therefore, this utility model is proposed. Utility Model Content
[0004] To solve the technical problems existing in the prior art, this utility model provides a dust cover for an 86-type dark box.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] An 86 junction box dust cover includes a junction box body and a cover body. The cover body has an elastic fastener on its flange. The elastic fastener engages with the inner wall of the opening surface of the junction box body to secure the cover body onto the junction box body.
[0007] Elastic fasteners are provided on the flanges on both sides of the cover plate body.
[0008] Two elastic fasteners are provided on the flange on the same side.
[0009] The elastic fastener includes a raised rib protruding from the surface of the cover plate body, and a gap is provided between the raised rib and the cover plate body.
[0010] The outer surface of the raised rib is provided with a first draft angle, the degree of which is 4°.
[0011] The cover plate body has a retaining edge on its flange.
[0012] The retaining edge is provided on the adjacent flange of the elastic fastener.
[0013] A second draft angle is provided on the outer side of the retaining edge, and the degree of the second draft angle is 0.5°.
[0014] The beneficial effects of this utility model are as follows:
[0015] This application uses elastic fasteners to align the cover plate with the junction box body and press it down to install the cover plate into the junction box body, eliminating the need for screws and making installation easier for workers. Additionally, a retaining edge structure is added to prevent the cover plate from opening, ensuring good dustproof performance. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of an 86-type junction box dust cover after installation. Figure 1 ;
[0017] Figure 2 This is a schematic diagram of the structure of an 86-type junction box dust cover after installation. Figure 2 ;
[0018] Figure 3 This is a schematic diagram of the structure of an 86-type junction box dust cover after installation. Figure 3 ;
[0019] Figure 4 This is a schematic diagram of the structure of an 86-type junction box dust cover after installation. Figure 4 ;
[0020] Figure 5 This is a schematic diagram of the dustproof cover structure for an 86-type junction box according to this utility model. Figure 1 ;
[0021] Figure 6 This is a schematic diagram of the dustproof cover structure for an 86-type junction box according to this utility model. Figure 2 ;
[0022] Figure 7 This is a schematic diagram of the dustproof cover structure for an 86-type junction box according to this utility model. Figure 3 ;
[0023] The components are labeled as follows: 1. Junction box body; 2. Cover plate body; 31. Raised rib; 32. Gap; 4. First draft angle; 5. Side guard; 6. Second draft angle; 7. Flanged edge; 8. Cover plate buckle; 9. Iron buckle. Detailed Implementation
[0024] The present invention will be further described below with reference to specific embodiments.
[0025] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model.
[0026] like Figures 1-7As shown, an 86-type junction box dust cover includes a junction box body 1 and a cover body 2. The flange 7 of the cover body 2 is provided with an elastic fastener (the material of the elastic fastener can be polyether ester elastomer material or damping rubber composition, etc.). The elastic fastener is engaged with the inner side wall of the opening surface of the junction box body 1 to engage and install the cover body 2 on the junction box body 1.
[0027] Elastic fasteners are provided on the flanges 7 on both opposite sides of the cover plate body 2, with two elastic fasteners on the flanges 7 on the same side. The elastic fasteners include protruding ribs 31 that protrude from the surface of the cover plate body 2, and a gap 32 is provided between the protruding ribs 31 and the cover plate body 2. A first draft angle 4 is provided on the outer surface of the protruding ribs 31, and the degree of the first draft angle 4 is 4°.
[0028] The cover plate body 2 has a retaining edge 5 on its flange 7; the retaining edge 5 is set on the adjacent flange 7 of the elastic fastener. A second draft angle 6 is provided on the outer side of the retaining edge 5, and the degree of the second draft angle 6 is 0.5°. The first draft angle 4 and the second draft angle 6 are set to reduce the difficulty of demolding during injection molding and improve production efficiency.
[0029] This application utilizes elastic fasteners, specifically four protruding ribs 31 extending from the surface of the cover plate body 2. These ribs, along with the gap 32 between the cover plate body 2 and the junction box body 1, allow the cover plate body 2 to be aligned with the junction box body 1 and then pressed down, completing the installation of the cover plate body 2 onto the junction box body 1 without the need for screws. This facilitates installation by workers. (However, it is important to ensure that the cover plate clips 8 on the cover plate body 2 and the metal clips 9 in the junction box body 1 are aligned.) Figure 3 and Figure 4 (As shown); at the same time, a retaining edge 5 structure was added to prevent the cover from opening, ensuring a good dustproof effect.
[0030] The above content is a further detailed description of the technical solution provided in conjunction with the preferred embodiments of this patent. It should not be considered that the specific implementation of this utility model is limited to the above description. For those skilled in the art to which this patent pertains, several simple deductions or substitutions can be made without departing from the concept of this patent, and all of these should be considered to fall within the protection scope of this patent.
Claims
1. A dust cover for an 86-type junction box, characterized in that: It includes a junction box body and a cover plate body. The cover plate body has an elastic fastener on its flange. The elastic fastener engages with the inner wall of the opening surface of the junction box body to secure the cover plate body onto the junction box body.
2. The dust cover for an 86-type junction box as described in claim 1, characterized in that: Elastic fasteners are provided on the flanges on both sides of the cover plate body.
3. The dust cover for an 86-type junction box as described in claim 2, characterized in that: Two elastic fasteners are provided on the flange on the same side.
4. The dust cover for an 86-type junction box as described in claim 3, characterized in that: The elastic fastener includes a raised rib protruding from the surface of the cover plate body, and a gap is provided between the raised rib and the cover plate body.
5. The dust cover for an 86-type junction box as described in claim 4, characterized in that: The outer surface of the raised rib is provided with a first draft angle, the degree of which is 4°.
6. The dust cover for an 86-type junction box as described in claim 1, characterized in that: The cover plate body has a retaining edge on its flange.
7. The dust cover for an 86-type junction box as described in claim 6, characterized in that: The retaining edge is provided on the adjacent flange of the elastic fastener.
8. A dust cover for an 86-type junction box as described in claim 6 or 7, characterized in that: A second draft angle is provided on the outer side of the retaining edge, and the degree of the second draft angle is 0.5°.