Dustproof and waterproof structure installed on printed circuit board

Abstract

The utility model discloses a dustproof and waterproof structure mounted on a printed circuit board, which belongs to the technical field of automotive electronics and comprises a first rear shell, a second rear shell, a main printed circuit board, an auxiliary printed circuit board, a bottom shell, a middle frame, a connector and screws. One side of the first rear shell penetrates through the other side of the auxiliary printed circuit board through a screw to be fixed to the middle frame, the main printed circuit board penetrates through the positioning column to be next to the first rear shell, the other side of the bottom shell, the other side of the main printed circuit board and the other side of the first rear shell are fixed to the middle frame through composite nailing, and the first rear shell is installed on the main printed circuit board. And meanwhile, the part in contact with the main printed circuit board is grounded, and the hole site penetrates through the auxiliary printed circuit board and is fixed on the middle frame, so that the backflow loop area is small, the electromagnetic interference is reduced, the distance between connectors can be reduced, more connectors can be placed, no external space is occupied, the design is compact, the structure is stable, abnormal sound is not easy to generate, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronics technology, specifically a dustproof and waterproof structure mounted on a printed circuit board. Background Technology

[0002] With the development of technology, cars are becoming increasingly intelligent. For consumers, cars are no longer just a means of transportation, but also a carrier of entertainment and lifestyle. Users are pursuing products with increasingly diverse functions and higher cost performance. In recent years, automakers have been tirelessly innovating components, pursuing cost reduction, rich functionality, and compact and stable designs. In the past, to prevent water from entering around the connectors, the rear shell (which could be made of sheet metal) around the connectors was nailed to the outside of the mid-frame. The distance between connectors needed to be kept relatively large, which made parts prone to abnormal noises and occupied a lot of space.

[0003] Therefore, we propose a dustproof and waterproof structure for installation on printed circuit boards. Utility Model Content

[0004] The purpose of this invention is to provide a dustproof and waterproof structure for installation on a printed circuit board, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: it includes a first rear shell, a second rear shell, a main printed circuit board, a secondary printed circuit board, a bottom shell, a middle frame, connectors, and screws. One side of the secondary printed circuit board is fixed to the middle frame by screws. One side of the first rear shell is fixed to the middle frame by screws passing through the secondary printed circuit board. The main printed circuit board passes through a positioning post and is close to the first rear shell. The other side of the bottom shell, the main printed circuit board, and the first rear shell are fixed to the middle frame by composite nails.

[0006] Furthermore, one side of the rear shell has intermittent rectangular protrusions, while the other side is bent.

[0007] Furthermore, the rear shell is mounted on the main printed circuit board, and the area in contact with the main printed circuit board is grounded.

[0008] Furthermore, the bottom shell and other holes of the main printed circuit board are fixed with screws.

[0009] Compared with the prior art, the utility model discloses the beneficial effects are: rear shell one installs on main printed circuit board, rear shell one can not only play waterproof, dustproof effect, the one side of rear shell one has the rectangular protruding intermittently, the other side carries out the bending treatment, rear shell one installs on main printed circuit board, and the place of contact with main printed circuit board is grounded, when double -layer printed circuit board, hole position passes through auxiliary printed circuit board and is fixed on the middle frame, like this realizes that the reflow loop area is small, reduces electromagnetic interference, can reduce the spacing between connector, can put connector more, does not occupy space, compact design, stable structure, does not produce abnormal sound easily, reduces the cost. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the double -layer line circuit board structure schematic diagram of the utility model,

[0011] Figure 2 It is the side view of the utility model double -layer line circuit board after removing the middle frame,

[0012] Figure 3 It is the rear shell one structure schematic diagram of the utility model double -layer line circuit board.

[0013] Figure 4 It is the single -layer line circuit board structure schematic diagram of the utility model,

[0014] Figure 5 It is the rear shell two structure schematic diagram of the utility model single -layer line circuit board.

[0015] In the drawing: 1, rear shell one, 2, main printed circuit board, 3, auxiliary printed circuit board, 4, bottom shell, 5, middle frame, 6, connector, 7, screw, 8, rear shell two. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.

[0017] Please refer to Figures 1-5The utility model provides a technical scheme: a dustproof and waterproof structure installed on a printed circuit board, which comprises a rear shell one 1, a main printed circuit board 2, a vice printed circuit board 3, a bottom shell 4, a rear shell two 8, a middle frame 5, a connector 6 and a screw 7, the vice printed circuit board 3 is fixed on the middle frame 5 through the screw 7 on one side, the rear shell one 1 is fixed on the middle frame 5 through the screw 7 on one side and passing through the other side of the vice printed circuit board 3, the main printed circuit board 2 is close to the rear shell one 1 through the positioning column, the bottom shell 4, the main printed circuit board 2 and the other side of the rear shell one 1 are fixed on the middle frame 5 through composite nailing, the rear shell one 1 is installed on the main printed circuit board, the rear shell one not only can play waterproof, dustproof effect, but also the distance of the connector 6 can be reduced, the number can be increased, the structure is relatively simple, the space volume can be relatively small, the loop area is reduced, the electromagnetic interference is reduced, and the waterproof and dustproof design of the rear shell one 1 can be in the middle of the main printed circuit board 2 and the vice printed circuit board 3, can also only have a printed circuit board, is not limited by the number of layers of printed circuit board, and the other holes of the bottom shell 4 and the main printed circuit board 2 are fixed by the screw 7.

[0018] Reference example 1: one side of the rear shell one 1 is discontinuous with rectangular protrusions, and the other side is bent, the rear shell one 1 is installed on the main printed circuit board 2, and the place where the rear shell one 1 contacts the main printed circuit board 2 is grounded, the hole is fixed on the middle frame by passing through the vice printed circuit board, so that the reflow loop area is small, the electromagnetic interference is reduced, the distance between the connectors is reduced, more connectors can be placed, the design is compact, the structure is stable, abnormal sound is not easy to produce, and the cost is reduced.

[0019] Reference example 2: as Figure 4 The design structure can not be limited by the number of layers of printed circuit board, can only have the main printed circuit board 2, and the vice printed circuit board 3, the bending direction of one side of the rear shell two 8 is changed from outward to inward, and is fixed on the middle frame 5 through the screw 7, the other side of the bottom shell 4, the main printed circuit board 2 and the rear shell two 8 is discontinuous with rectangular protrusions, and is fixed on the middle frame 5 through composite nailing, and the other holes of the bottom shell 4 and the main printed circuit board 2 are fixed by the screw 7.

[0020] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A dustproof and waterproof structure mounted on a printed circuit board, comprising a first rear shell (1), a second rear shell (8), a main printed circuit board (2), a secondary printed circuit board (3), a bottom shell (4), a middle frame (5), connectors (6), and screws (7), characterized in that: Said vice printed circuit board (3) one side by screw (7) fixed in the frame (5), the rear shell (1) one side by screw (7) through the vice printed circuit board (3) the other side fixed in the frame (5), the main printed circuit board (2) through the positioning column next to the rear shell (1), the bottom shell (4), main printed circuit board (2), the other side of the rear shell (1) is fixed on the frame (5) by composite nail.

2. The dust and water proof structure mounted on a printed wiring board according to claim 1, characterized by: Said rear shell (1) one side is interrupted with rectangular protrusions, the other side is bent.

3. The dust and water proof structure mounted on a printed wiring board according to claim 1, characterized by: Said rear shell (1) is installed on the main printed circuit board (2), and the place where the main printed circuit board (2) contacts is grounded.

4. The dust and water proof structure mounted on a printed wiring board according to claim 1, characterized by: Said bottom shell (4), main printed circuit board (2) other hole with screw (7) fixed.

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