Millimeter wave radar sealing and fixing structure

Abstract

The utility model relates to the technical field of millimeter-wave radars, in particular to a millimeter-wave radar sealing and fixing structure, which comprises a bottom cover, a surface cover is connected to the surface of the bottom cover, a PCBA (printed circuit board assembly) is mounted in the surface cover, self-tapping screws are in threaded connection to four corners of the PCBA, a wire harness is arranged on one side of the bottom cover, and the other side of the bottom cover is provided with a fixing screw. One end of the wire harness extends into the surface cover and is electrically connected with the PCBA board; a clamping block is integrally formed on the surface of one end of the wire harness in an injection molding mode, a wire harness groove is formed in the center of the surface of the bottom cover, and the wire harness is installed on the bottom cover. According to the utility model, the surface cover and the bottom cover are made of plastics mainly composed of PC or PBT, and the surface cover and the bottom cover are sealed and waterproof through the waterproof sealing ring and are fixed through ultrasonic welding; the ultrasonic welding also has certain sealing and waterproof effects, and the combination of the ultrasonic welding and the waterproof effect perfectly solves the waterproof problem and also solves the problem that the radar is large in size due to a traditional screw fixing structure.

Description

Technical Field

[0001] The utility model relates to the technical field of millimeter wave radars, in particular to a millimeter wave radar sealing and fixing structure. Background Art

[0002] Currently, 77GHz or 24GHz millimeter-wave radars in vehicles primarily serve the following functions: corner radars for blind spot monitoring and lane change assistance, and front and rear radars for automated emergency braking (AEB) and rear-end collision avoidance. Due to space constraints, the size of radar modules is limited, often leaving insufficient space for millimeter-wave radars in tight spaces.

[0003] Currently, radar modules on the market usually have a front cover made of plastic, and a bottom cover made of partly metal and partly plastic. A sealing ring or glue is used between the two, and the two are fixed with screws. When both are made of plastic, the fixed part of the radar is sealed and fixed using laser welding.

[0004] The use of screw fixation takes up space, which makes the radar larger. The use of laser welding fixation requires high material and dimensional accuracy for the top cover and bottom cover, resulting in high production costs. Utility Model Content

[0005] The purpose of the present invention is to provide a millimeter-wave radar sealing and fixing structure to solve the problems proposed in the above-mentioned background technology that screw fixation requires space, resulting in a large radar volume, and that the laser welding fixation method requires high requirements on the materials and matching dimensional accuracy of the top cover and bottom cover, resulting in high production costs.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a millimeter-wave radar sealing and fixing structure, comprising a bottom cover, the surface of the bottom cover being connected to a face cover, and a PCBA board being installed inside the face cover, the four corners of the PCBA board being threaded with self-tapping screws, a wiring harness being provided on one side of the bottom cover, and one end of the wiring harness extending to the interior of the face cover and electrically connected to the PCBA board; a card block being integrally injection-molded on the surface of one end of the wiring harness, a wiring harness groove being provided at the center of the bottom cover surface, and when the wiring harness is installed with the bottom cover, the wiring harness groove and the card block are snap-fitted together.

[0007] Preferably, the surface of the bottom cover is integrally injection-molded with four bottom cover self-tapping screw columns, which facilitate fixing the millimeter wave radar on the external bracket or the car body.

[0008] Preferably, a waterproof sealing ring groove is opened at the edge of the bottom cover surface, and a waterproof sealing ring is embedded in the waterproof sealing ring groove. The waterproof sealing ring is used for sealing and waterproofing after the bottom cover and the surface cover are installed.

[0009] Preferably, the surface of the bottom cover is provided with an air vent, which is used for exhaust work to keep the internal and external air pressures consistent, and the inner surface of the air vent is pasted with a waterproof breathable film; the surface of the bottom of the bottom cover is provided with an exhaust groove, and the exhaust groove is communicated with the air vent.

[0010] Preferably, the four corner positions inside the face cover are all integrally injection-molded with face cover self-tapping screw columns, and the PCBA board is placed on the surface of the face cover self-tapping screw columns during installation and is threadedly connected to the face cover self-tapping screw columns through self-tapping screws to fix the PCBA board.

[0011] Preferably, a pressure strip is integrally injection-molded at the edge of the surface of the face cover, and the pressure strip is used to press the waterproof sealing ring in the waterproof sealing ring groove and squeeze the waterproof sealing ring to complete the waterproof work.

[0012] Preferably, a weld line is integrally injection-molded on the surface of the bottom cover and located outside the waterproof sealing ring groove, and the weld line is used for welding to fix the bottom cover and the surface cover to each other; a welding surface is provided on the surface of the surface cover and located outside the pressure strip, and after the bottom cover and the surface cover are installed, they are fixed by welding each other through the weld line and the welding surface.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the waterproof sealing of the face cover and bottom cover of the millimeter wave radar sealing and fixing structure adopts a waterproof sealing ring, which is simple and reliable; the face cover and bottom cover are fixed by ultrasonic welding, which has low material requirements, simple operation, and low overall cost, and ultrasonic welding has certain waterproof performance, further enhancing the waterproof effect of the shell; the radar bottom cover is integrally injection-molded with a self-tapping screw column, which is convenient for fixing to the bracket or car body with the self-tapping screw; the overall size is small, with the length, width and height dimensions within 55mm*50mm*25mm; the shell is made of plastic material (non-metal), which is light and lightweight. Therefore, the face cover and bottom cover of the present invention are made of plastic with PC or PBT as the main component, and a waterproof sealing ring is used between the two for sealing and waterproofing, and ultrasonic welding is used for fixing; ultrasonic welding also has certain sealing and waterproofing effects. The combination of the two not only perfectly solves the waterproof problem, but also solves the problem that the traditional screw fixing structure causes the radar to be larger in size. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional appearance structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0016] Figure 3 This is a three-dimensional enlarged structural diagram of the bottom cover of the utility model;

[0017] Figure 4 This is an enlarged structural diagram of the bottom cover of the utility model when viewed from above;

[0018] Figure 5 This is a three-dimensional enlarged structural diagram of the cover of the utility model;

[0019] Figure 6 This is a schematic diagram of the enlarged structure of the wiring harness of the present utility model.

[0020] In the figure: 1. Bottom cover; 11. Self-tapping screw column for bottom cover; 12. Waterproof sealing ring groove; 13. Weld line; 14. Air vent; 15. Wire harness groove; 16. Exhaust groove; 2. Top cover; 21. Self-tapping screw column for top cover; 22. Pressure strip; 23. Welding surface; 3. Wire harness; 31. Block; 4. PCBA board; 41. Self-tapping screw; 5. Waterproof sealing ring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] The utility model provides a millimeter wave radar sealing and fixing structure. Figure 1 、 Figure 2 as well as Figure 6 As shown, it includes a bottom cover 1, the surface of the bottom cover 1 is connected to the surface cover 2, and the bottom cover 1 and the surface cover 2 are both made of plastic material, which is mainly composed of PC or PBT. A PCBA board 4 is installed inside the surface cover 2, and a wiring harness 3 is provided on one side of the bottom cover 1, and one end of the wiring harness 3 extends to the interior of the surface cover 2 and is electrically connected to the PCBA board 4. A card block 31 is integrally injection-molded on the surface of one end of the wiring harness 3. The card block 31 has a long side and a short side. After being installed in the wiring harness groove 15, it is rotated at a certain angle to fix the wiring harness and prevent it from moving; a wiring harness groove 15 is opened at the center position of the surface of the bottom cover 1, and when the wiring harness 3 is installed with the bottom cover 1, the wiring harness groove 15 and the card block 31 are mutually engaged.

[0023] During implementation, align the short side of the clamping block 31 with the short side of the harness groove 15, press the harness 3 in, so that the clamping block 31 completely enters the harness groove 15 of the bottom cover 1, and then rotate the harness 3 90 degrees to engage and fix the clamping block 31 with the harness groove 15 so that the harness 3 cannot fall off, and then fill the harness groove 15 of the bottom cover 1 with glue to seal and waterproof it.

[0024] Further, if Figure 2 as well as Figure 3As shown, the four corner positions of the PCBA board 4 are all threadedly connected with self-tapping screws 41, and the four corner positions inside the face cover 2 are all integrally injection-molded with face cover self-tapping screw columns 21. When installing, the PCBA board 4 is placed on the surface of the face cover self-tapping screw columns 21 and is threadedly connected to the face cover self-tapping screw columns 21 through the self-tapping screws 41 to fix the PCBA board 4.

[0025] During implementation, the wires on the wiring harness 3 are soldered one by one to the PCBA board 4 according to the specified path requirements; then the PCBA board 4 is placed on the self-tapping screw column 21 of the surface cover and tightened with the self-tapping screw 41 to complete the installation.

[0026] Further, if Figure 3 as well as Figure 4 As shown, the surface of the bottom cover 1 is integrally injection-molded with four bottom cover self-tapping screw columns 11, which facilitate fixing the millimeter wave radar to the external bracket or the car body. The surface of the bottom cover 1 is provided with air vents 14, which are used for exhaust work to keep the internal and external air pressures consistent, and the inner surface of the air vents 14 is pasted with a waterproof breathable film; the surface of the bottom of the bottom cover 1 is provided with an exhaust groove 16, and the exhaust groove 16 is communicated with the air vent 14. The surface of the exhaust groove 16 is sunken and has a height difference with the bottom surface of the bottom cover 1 on the outside to prevent the surface from being tightly attached to the bracket and affecting the exhaust.

[0027] During implementation, tear off the release paper on the side of the waterproof breathable membrane to reveal a circle of 3M glue. Align the middle of the waterproof breathable membrane with the center of the vent hole 14 and stick it on. Then apply glue around the periphery of the breathable membrane to further waterproof it.

[0028] Further, if Figure 2 as well as Figure 5 As shown, a waterproof sealing ring groove 12 is opened at the edge position of the surface of the bottom cover 1, and a waterproof sealing ring 5 is embedded in the inside of the waterproof sealing ring groove 12. The waterproof sealing ring 5 is used for sealing and waterproofing after the bottom cover 1 and the surface cover 2 are installed. A pressure strip 22 is integrally injection-molded at the edge position of the surface of the surface cover 2. The pressure strip 22 is used to press the waterproof sealing ring 5 in the waterproof sealing ring groove 12 and squeeze the waterproof sealing ring 5 to complete the waterproofing work. A weld line 13 is integrally injection-molded on the surface of the bottom cover 1 and located on the outside of the waterproof sealing ring groove 12. The weld line 13 is used for welding to fix the bottom cover 1 and the surface cover 2 to each other; a welding surface 23 is provided on the surface of the surface cover 2 and located on the outside of the pressure strip 22, and the bottom cover 1 and the surface cover 2 are fixed by welding each other through the weld line 13 and the welding surface 23 after installation.

[0029] During implementation, the waterproof sealing ring 5 is placed into the waterproof sealing ring groove 12 of the bottom cover 1 , the bottom cover 1 is covered, and welding is performed through the welding line 13 and the welding surface 23 to weld the bottom cover 1 to the top cover 2 .

[0030] Working principle: When using, first tear off the release paper on the side of the waterproof breathable membrane, revealing a circle of 3M glue. Align the middle of the waterproof breathable membrane with the center of the air hole 14 and stick it on. Then apply glue around the periphery of the breathable membrane to further waterproof it. The installation of the waterproof breathable membrane is completed.

[0031] Then align the short side of the clamping block 31 with the short side of the wiring harness groove 15, press the wiring harness 3 in, so that the clamping block 31 completely enters the wiring harness groove 15 of the bottom cover 1, and then rotate the wiring harness 3 90 degrees to engage and fix the clamping block 31 with the wiring harness groove 15 so that the wiring harness 3 cannot fall off, and then fill the wiring harness groove 15 of the bottom cover 1 with glue to seal and waterproof it.

[0032] Then, the wires on the wiring harness 3 are soldered one by one to the PCBA board 4 according to the specified path requirements; then the PCBA board 4 is placed on the self-tapping screw column 21 of the surface cover and tightened with the self-tapping screw 41 to complete the installation.

[0033] Finally, place the waterproof sealing ring 5 into the waterproof sealing ring groove 12 of the bottom cover 1, cover the bottom cover 1, and perform welding. Once the bottom cover 1 is welded to the surface cover 2, the overall installation work is completed.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

Claims

1. A millimeter wave radar sealing and fixing structure, comprising a bottom cover (1), characterized in that: The surface of the bottom cover (1) is connected to the front cover (2), and a PCBA board (4) is installed inside the front cover (2), and self-tapping screws (41) are threadedly connected to the four corners of the PCBA board (4). A wiring harness (3) is provided on one side of the bottom cover (1), and one end of the wiring harness (3) extends to the inside of the front cover (2) and is electrically connected to the PCBA board (4); a clamping block (31) is integrally injection-molded on the surface of one end of the wiring harness (3), and a wiring harness groove (15) is provided at the center of the surface of the bottom cover (1), and when the wiring harness (3) is installed with the bottom cover (1), the wiring harness groove (15) and the clamping block (31) are mutually engaged.

2. The millimeter wave radar sealing and fixing structure according to claim 1, characterized in that: The surface of the bottom cover (1) is integrally injection-molded with four bottom cover self-tapping screw columns (11), and the bottom cover self-tapping screw columns (11) facilitate fixing the millimeter wave radar on an external bracket or a car body.

3. The millimeter wave radar sealing and fixing structure according to claim 1, characterized in that: A waterproof sealing ring groove (12) is provided at the edge of the surface of the bottom cover (1), and a waterproof sealing ring (5) is embedded in the waterproof sealing ring groove (12). The waterproof sealing ring (5) is used for sealing and waterproofing after the bottom cover (1) and the surface cover (2) are installed.

4. The millimeter wave radar sealing and fixing structure according to claim 1, characterized in that: The surface of the bottom cover (1) is provided with an air vent (14), which is used for exhaust work to keep the internal air pressure consistent with the external air pressure, and the inner surface of the air vent (14) is adhered with a waterproof breathable film; the surface of the bottom of the bottom cover (1) is provided with an air vent groove (16), and the air vent groove (16) is communicated with the air vent (14).

5. The millimeter wave radar sealing and fixing structure according to claim 1, characterized in that: The four corner positions inside the face cover (2) are all integrally injection-molded with face cover self-tapping screw columns (21), and the PCBA board (4) is placed on the surface of the face cover self-tapping screw columns (21) during installation and is threadedly connected to the face cover self-tapping screw columns (21) via self-tapping screws (41) to fix the PCBA board (4).

6. The millimeter wave radar sealing and fixing structure according to claim 1, characterized in that: A pressure strip (22) is integrally injection-molded at the edge of the surface of the face cover (2). The pressure strip (22) is used to press the waterproof sealing ring (5) in the waterproof sealing ring groove (12) and squeeze the waterproof sealing ring (5) to complete the waterproofing work.

7. The millimeter wave radar sealing and fixing structure according to claim 1, characterized in that: A weld line (13) is integrally molded on the surface of the bottom cover (1) and located outside the waterproof sealing ring groove (12). The weld line (13) is used for welding to fix the bottom cover (1) and the front cover (2) to each other. A welding surface (23) is provided on the surface of the front cover (2) and located outside the pressure strip (22). After installation, the bottom cover (1) and the front cover (2) are fixed to each other by welding the weld line (13) and the welding surface (23).

Images