Vehicle-mounted NFC induction module

Abstract

The utility model discloses a kind of structure of vehicle-mounted NFC induction module, including upper cover, lower cover, PCB board and wiring harness, upper cover and lower cover are sealed by laser welding, PCB board is installed in lower cover, lower cover side surface extends to form protruding threading port outward, wiring harness enters lower cover interior and is connected with PCB board by threading port, threading port outer surface is reserved injection molding sealing groove, by secondary injection filling sealing groove, secondary injection material melts wiring harness outer covering and thus is integrated, reach gapless state.The upper cover and the lower cover of the vehicle-mounted NFC induction module structure provided by the utility model are sealed by laser welding, threading port is sealed by secondary injection, and the sealing property is good.

Description

Technical Field

[0001] This utility model relates to the field of vehicle electronic devices, specifically to a vehicle NFC sensing module. Background Technology

[0002] Most cars on the market are equipped with in-vehicle NFC sensing modules, which can unlock and lock the vehicle. They are mostly installed on the outside of the vehicle (such as inside the rearview mirror), and the protection level is often required to be high, usually reaching IP67, to ensure that its function is stable and does not fail. To achieve waterproofing, existing NFC modules typically use a waterproof sealing ring pressed between the top and bottom covers, and then screws are used to secure the top and bottom covers. This process is quite complicated, involves many parts, has low production efficiency, and is costly. Furthermore, due to the limited external installation space in vehicles and the difficulty of connector mating, NFC modules typically have their own wiring harnesses, allowing the connectors to be routed into a relatively larger space inside the vehicle for mating. Regarding how to achieve a seal between the wiring harness and the housing, the common practice is to pass the wiring harness through the housing and then apply sealant to the connection point to ensure the product is waterproof. However, this adhesive sealing process has drawbacks such as difficulty in controlling the amount of adhesive applied, long drying time, poor consistency, difficulty in process control, low production efficiency, and unstable quality. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an in-vehicle NFC sensing module, which mainly solves the problem that the sealing structure of existing in-vehicle NFC sensing modules needs improvement.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: This utility model provides an in-vehicle NFC sensing module, including an upper cover, a lower cover, a PCB board, and a wiring harness. The upper cover and the lower cover are sealed by laser welding. The PCB board is installed in the lower cover. The side of the lower cover extends outward to form a protruding wire passage. The wiring harness enters the interior of the lower cover through the wire passage and connects to the PCB board. The outer surface of the wire passage has a pre-reserved injection molding sealing groove. The sealing groove is filled by secondary injection molding. The secondary injection molding material melts the wire harness and thus forms a whole, achieving a gapless state.

[0005] Preferably, the material used for the secondary injection molding is the same as the material of the lower cover.

[0006] Preferably, the outer surface of the wire harness is made of PVC, TPE, or PU material.

[0007] Preferably, the lower cover has internal support ribs, the PCB board is placed on the support ribs, and multiple pressing ribs extend from the bottom surface of the upper cover. After the upper cover and the lower cover are welded together, the pressing ribs and the support ribs work together to clamp the PCB board tightly.

[0008] Preferably, the pressing rib is triangular and is used to make the bottom tip of the PCB board rounded.

[0009] Preferably, the inner wall of the lower cover is provided with multiple positioning ribs corresponding to the four sides of the PCB board, and each positioning rib cooperates and clamps the PCB board around its perimeter through elastic deformation.

[0010] Preferably, the side walls of the lower cover are stepped, and the bottom surface of the lower cover has a cross-shaped convex or concave structure to prevent the lower cover from warping and deforming.

[0011] This utility model has the following beneficial effects: The upper and lower covers of the vehicle-mounted NFC sensing module provided by this utility model are sealed by laser welding, and the wiring port is sealed by secondary injection molding, resulting in good sealing performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the vehicle-mounted NFC sensing module according to an embodiment of this utility model; Figure 2 yes Figure 1 An exploded view of the NFC module; Figure 3 yes Figure 2 Another viewpoint; Figure 4 This is a top view of the bottom cover; Figure 5 yes Figure 1 A top view of the NFC module; Figure 6 It is along Figure 5 A cross-sectional view of the CC line; Figure 7 It is along Figure 5 A cross-sectional view along line AA in the middle. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] like Figures 1 to 7As shown, this embodiment discloses an in-vehicle NFC sensing module, including an upper cover 1, a lower cover 2, a PCB board 3, and a wiring harness 4. The upper cover 1 and the lower cover 2 are sealed by laser welding. The PCB board 3 is installed in the lower cover 2, and an antenna is arranged on the PCB board. The side of the lower cover 2 extends outward to form a protruding wire-passing port 5. The wiring harness 4 enters the interior of the lower cover 2 through the wire-passing port 5 and connects to the PCB board 3. At least one injection molding sealing groove 6 is reserved on the outer surface of the wire-passing port 5. The sealing groove 6 is filled by secondary injection molding, and the secondary injection molding material melts the outer surface of the wiring harness to form a whole, achieving a gapless state. The wiring harness 4 is inserted into the one-time molded lower cover 2 through the wire-passing port 5, and then the lower cover 2 and the wiring harness 4 are placed together in a secondary injection molding mold for secondary injection molding. The wire-passing port 5 of the lower cover 2 has a reserved injection molding sealing groove 6, which can increase the fusion area between the secondary injection molding material and the wire-passing port 5, thereby improving the sealing reliability.

[0016] Preferably, the secondary injection molding portion 14 (see...) Figure 7 The materials used are the same as those used for the lower cover 2. The secondary injection molding material is the same as that used for the lower cover 2, which allows for good welding after injection molding. The outer sheath of the wire harness 4 is made of materials including but not limited to PVC, TPE, or PU, which can be well welded to the material of the lower cover 2 to achieve a sealing and waterproof effect.

[0017] The lower cover 2 has internal support ribs 7, and the PCB board 3 is placed on the support ribs 7. Multiple pressing ribs 8 extend from the bottom surface of the upper cover 1. After the upper cover 1 and lower cover 2 are welded together, the pressing ribs 8 and support ribs 7 work together to clamp the PCB board 3 vertically, thus preventing the PCB board 3 from moving up and down within the lower cover 2. The distance between the lowest point of the pressing rib 8 and the support rib 7 is slightly less than the thickness of the PCB board 3. After the upper cover 1 and lower cover 2 are assembled, the pressing rib 8 and PCB board 3 are pressed together (i.e., the pressing rib 8 and PCB board 3 are interference-fitted), and the pressing rib 8 undergoes elastic deformation, pressing tightly onto the PCB board 3. Preferably, in this embodiment, the pressing rib 8 is triangular, and the bottom tip of the contact rib 3 is rounded. In other embodiments, the pressing rib 8 can also adopt other shapes.

[0018] Preferably, the inner wall of the lower cover 2 is provided with multiple positioning ribs 9 corresponding to the four sides of the PCB board 3. Each positioning rib 9 cooperates and clamps the PCB board 3 around its perimeter through elastic deformation (the positioning ribs 9 and the PCB board 3 are interference fit), thereby preventing the PCB board 3 from moving horizontally. In this embodiment, the PCB board 3 is a quadrilateral board, and the inner wall of the lower cover 2 is provided with positioning ribs 9 at the four sides of the PCB board 3 to clamp the PCB board 3 in all directions.

[0019] In this embodiment, the supporting rib 7 and the positioning rib 9 are connected as one unit. In other embodiments, the two can be staggered, that is, the supporting rib 7 and the positioning rib 9 can be two independent structures.

[0020] The PCB board 3 is provided with positioning holes 11, and the lower cover 2 is provided with positioning posts 10. The positioning posts 10 are inserted into the positioning holes 11 to position the PCB board 3, and at the same time, they also serve to prevent incorrect placement of the PCB board 3.

[0021] To prevent warping, concave deformation, and other problems, automotive electronic products on the market typically increase the wall thickness of the casing or design a grid-shaped or honeycomb-shaped reinforcing rib on the bottom surface of the casing to prevent warping and deformation. Reinforcing ribs are also designed around the perimeter of the casing sidewalls to prevent concave deformation. This results in a casing structure with many ribs, a surface that is prone to shrinkage, complex mold processing, and difficulty in injection molding.

[0022] The side wall of the lower cover 2 of the vehicle-mounted NFC sensing module provided in this embodiment is stepped, and the bottom surface is provided with a cross-shaped convex or concave structure to prevent deformation of the lower cover 2, thereby ensuring the flatness of the product to facilitate laser welding of the upper and lower covers 2. Figure 2 In this embodiment, the lower cover sidewall is provided with a stepped surface 12. The bottom surface of the lower cover is provided with a cross-shaped recessed portion 13, see Figure 4 .

[0023] The molds for the upper and lower covers of the vehicle-mounted NFC sensing module provided in this embodiment are easy to process, easy to injection mold, and the surface is not prone to shrinkage, making production operations convenient. The PCB board is directly pressed together by the upper and lower covers without the need for screws, simplifying assembly.

[0024] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A vehicle-mounted NFC sensing module, characterized in that, It includes an upper cover, a lower cover, a PCB board, and a wire harness. The upper and lower covers are sealed by laser welding. The PCB board is installed in the lower cover. The side of the lower cover extends outward to form a protruding wire pass-through port. The wire harness enters the interior of the lower cover through the wire pass-through port and connects with the PCB board. The outer surface of the wire pass-through port has a pre-reserved injection molding sealing groove. The sealing groove is filled by secondary injection molding. The secondary injection molding material melts the wire harness and thus forms a whole, achieving a gapless state.

2. The vehicle-mounted NFC sensing module according to claim 1, characterized in that, The material used for the second injection molding is the same as that used for the bottom cover.

3. The vehicle-mounted NFC sensing module according to claim 1, characterized in that, The outer sheath of the wire harness is made of PVC, TPE, or PU material.

4. The vehicle-mounted NFC sensing module according to claim 1, characterized in that, The lower cover has internal support ribs, and the PCB board is placed on the support ribs. Multiple pressing ribs extend from the bottom surface of the upper cover. After the upper cover and the lower cover are welded together, the pressing ribs and the support ribs work together to clamp the PCB board tightly.

5. The vehicle-mounted NFC sensing module according to claim 4, characterized in that, The pressing ribs are triangular and are used to round the bottom tip of the PCB board.

6. The vehicle-mounted NFC sensing module according to claim 1, characterized in that, The inner wall of the lower cover is provided with multiple positioning ribs corresponding to the four sides of the PCB board. Each positioning rib cooperates and clamps the PCB board around its perimeter through elastic deformation.

7. The vehicle-mounted NFC sensing module according to claim 1, characterized in that, The bottom cover has stepped sidewalls and a cross-shaped convex or concave structure on the bottom surface to prevent warping and deformation.

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