Millimeter wave radar antenna cover

Abstract

The utility model relates to the technical field of vehicle-mounted radars, and specifically to a millimeter-wave radar antenna cover, including a cover plate body and a connector, wherein the terminal in the connector is interference-fitted with the radar circuit board in the cover plate body through the fisheye structure end; a pressure relief hole and a balancing part are provided on the cover plate body; the pressure relief hole connects the cover plate body and the connector; and the cover plate body can allow internal and external gas to circulate through the balancing part. In the utility model, the terminal is interference-fitted with the circuit board through the fisheye structure, which avoids welding, can achieve quick connection, and saves labor time and cost; by providing a pressure relief hole in the connector, the connector and the cover plate body are connected, the gas resistance in the connector is reduced, and the plug-in and unplugging operation is facilitated; a through hole and a vent are provided on the cover plate body, which connect the inside and outside of the cover plate body, and a waterproof and breathable film is pasted on the top wall of the through hole to balance the internal and external air pressures and avoid condensation inside, thereby improving waterproofness and maintaining system stability.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted radars, in particular to a millimeter wave radar antenna cover. Background Art

[0002] Automotive radar is a type of radar mainly used in cars or other ground motor vehicles, and has different functions based on different technologies. At present, the on-board radar on cars is usually placed in a box and used in a sealed environment. Among them, the existing problems include the following:

[0003] (1) The radar circuit board in the cover plate / box is connected to the terminals in the plug by welding, which is prone to welding leaks, resulting in unstable connections. In addition, the circuit board is easily deformed and damaged due to the high temperature process.

[0004] (2) When used in a sealed environment, the connector is sealed with the external sealed wire end. During use, there is a thermal effect of the current, which causes the gas in the connector to expand due to the heat. There is a pressure difference between the inside and outside of the connector, which makes it difficult to plug and unplug.

[0005] (3) The box body / cover is sealed for use. The components and circuits on the radar circuit board generate heat when working in a sealed environment. The internal gas expansion can easily cause the box body to deform. In addition, the internal temperature is higher than the external temperature for a long time, which can easily cause condensation inside. A humid sealed environment can easily lead to unstable performance of the radar circuit board, affecting the use effect.

[0006] Based on the problems in the prior art, the utility model provides a millimeter wave radar antenna cover. Utility Model Content

[0007] The utility model aims to provide a millimeter wave radar antenna cover to solve the technical problems in the prior art that the radar circuit board generates heat during use in a relatively sealed environment, and the imbalance of internal and external air pressure and humidity easily leads to unstable structural performance.

[0008] The technical solution of the utility model is: a millimeter wave radar antenna cover, comprising a plug and a cover plate body with a receiving cavity, the plug is connected to the cover plate body and extends outside the cover plate body, a radar circuit board is accommodated in the receiving cavity, a terminal group with a fisheye structure is inserted through the plug, and the fisheye structure end of the terminal group and the mounting hole on the radar circuit board are interference fit;

[0009] A pressure relief hole and a balancing part are arranged on the cover plate body;

[0010] The pressure relief hole is constructed on a common side wall of the connector and the cover plate body, and communicates with the accommodating cavity and the through-path cavity inside the connector; the cover plate body can allow internal and external gas to circulate through the balancing portion.

[0011] Preferably, the balancing part comprises a through hole and a center block; the through hole is constructed on the cover plate body and is placed in the accommodating cavity; the center block is placed in the through hole, and a ventilated part is reserved between the center block and the side wall of the through hole for gas convection inside and outside the cover plate body;

[0012] A fixing platform is arranged on the top of the through hole, and a waterproof and breathable film is pasted on the surface of the fixing platform. The waterproof and breathable film can cover the cross-sectional diameter of the through hole.

[0013] Preferably, the lower bottom surface of the central block is flush with the outer wall surface of the cover plate body and connected as a whole; the air permeable portion adopts a groove and air hole matching manner;

[0014] The groove is formed by the concave outer wall surface of the cover plate body and is radially arranged on the bottom circumference of the center block; the air hole is constructed inside the through hole, and the bottom of the air hole is connected to the groove, and the top of the air hole is connected to the accommodating cavity.

[0015] Preferably, the height of the top surface of the center block is lower than the height of the upper surface of the through hole, and the volume space inside the through hole except the center block is removed to form a redundant cavity, and the air hole is formed by the redundant cavity;

[0016] The height of the plane where the bottom of the groove is located is higher than the height of the top surface of the center block. The bottom of the cross section of the groove is blocked by the center block and a drop window is formed on the top, and the drop window connects the groove and the air hole.

[0017] Preferably, the center block fills the through hole, and the upper top surface of the center block does not exceed the top plane of the through hole; the air hole is composed of a plurality of long grooves opened inside the center block, the top end surface of the long groove is connected to the accommodating cavity, and the bottom end surface of the long groove is connected to the groove.

[0018] Preferably, the connector includes a connector shell extending to the outside of the cover plate body, and a baffle arranged in the connector shell, the baffle sealing the through-path cavity of the connector shell and the docking window of the cover plate body; the pressure relief hole is constructed on the baffle along the thickness direction of the baffle.

[0019] Compared with the prior art, the advantages of the utility model are:

[0020] (1) The utility model provides a pressure relief hole in the connector of the cover plate body to connect the interior of the connector with the interior of the cover plate body, thereby reducing the gas resistance in the connector and facilitating plugging and unplugging operations.

[0021] (2) The utility model provides a balancing part on the cover plate body, the balancing part includes a through hole, a center block arranged in the through hole and a breathable part, the breathable part can connect the inside and outside of the cover plate body, and a waterproof breathable film is pasted on the top wall of the through hole to balance the internal air pressure, prevent condensation from occurring inside, improve waterproofness, and maintain system stability.

[0022] (3) The terminal in the plug of the utility model is interference-fitted with the radar circuit board in the cover plate body through the fisheye structure end, which can achieve quick connection, save labor costs, and avoid welding, thereby preventing the radar circuit board from being damaged by high temperature stress during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0024] Figure 1 It is a three-dimensional schematic diagram of the cover plate body of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the plug connector of the utility model;

[0026] Figure 3 For the utility model Figure 1 The enlarged schematic diagram of a in FIG.

[0027] Figure 4 This is a schematic top view of the ventilation portion of the utility model in a first embodiment;

[0028] Figure 5 It is a three-dimensional cross-sectional schematic diagram of the ventilation portion of the utility model in the first embodiment;

[0029] Figure 6 This is a schematic top view of the ventilation portion of the utility model in a second embodiment;

[0030] Wherein: 1. Cover plate body;

[0031] 10. Accommodating cavity; 11. Balancing portion;

[0032] 111, through hole; 112, middle block; 113, air permeable portion; 1131, groove; 1132, air hole; 1132a, redundant cavity; 1132b, long groove; 114, fixing platform;

[0033] 2. Connect the plug;

[0034] 20. Through-hole cavity; 21. Connector housing; 22. Baffle; 23. Pressure relief hole;

[0035] 3. Waterproof breathable membrane; 4. Terminal; 5. Positioning column. DETAILED DESCRIPTION

[0036] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0037] like Figure 1 As shown, a millimeter wave radar antenna cover includes a cover plate body 1 and a connector 2 connected to the outside of the cover plate body 1. The cover plate body 1 has a receiving cavity 10, in which a radar circuit board is received, and a plurality of positioning posts 5 in the cover plate body 1 are used to position the radar circuit board.

[0038] The plug 2 of the radar circuit board passes through the plug-in terminal 4, which is L-shaped as a whole and is provided with a plurality of terminals to form a terminal group / bundle. The terminal 4 is arranged in a fisheye structure at one end facing the cover plate body 1. The terminal 4 adopts the fisheye structure to have an interference fit with the mounting hole on the radar circuit board, and the connection is solder-free to achieve quick connection, which can prevent the radar circuit board from being damaged by high temperature stress during the welding process.

[0039] Refer to the attached Figure 2 The connector 2 includes a connector housing 21 and a baffle 22. The docking window of the connector housing 21 close to the cover body 1 is sealed and shielded by the baffle 22, and the other end is an open opening for mating with an external sealed wire terminal.

[0040] A through cavity 20 is formed inside the connector housing 21. The terminal 4 is inserted through the insertion hole of the baffle 22 and is matched with the external sealed wire terminal in the through cavity 20 to achieve electrical connection.

[0041] The cover plate body 1 is provided with a pressure relief hole 23 and a balancing portion 11 .

[0042] The baffle plate 22 is provided as a side wall shared by the cover plate body 1 and the connector 2. Figure 2 Combined with Figure 3 As shown in the figure, the pressure relief hole 23 is opened along the thickness direction of the baffle 22, connecting the accommodating cavity 10 and the through cavity 20. The cross-sectional shape of the pressure relief hole 23 can be configured into any shape, including but not limited to circular, elliptical, triangular, quadrilateral, pentagonal, hexagonal, and dumbbell.

[0043] Specifically, as attached Figure 4 As shown, the balancing part 11 includes a through hole 111 and a center block 112. The through hole 111 is constructed on the cover plate body 1 and is placed in the accommodating cavity 10; the center block 112 is placed in the through hole 111, and a ventilating portion 113 is reserved between the center block 112 and the side wall of the through hole 111 for gas convection inside and outside the cover plate body 1.

[0044] The pressure relief hole 23 connects the through-path cavity 20 and the accommodating cavity 10, and the accommodating cavity 10 is connected to the outside through the air-permeable portion 113 for gas exchange. While maintaining the sealing, it can balance the air pressure in the connector 2, reduce air resistance, and reduce the difficulty of mating and plugging the connector 2 with the external wire terminal.

[0045] It is worth noting that since the connector 2 is sealed and matched with the external wire end, the sealing performance of the connector 2 has higher requirements. During the product production and testing stage, the connector 2 is connected to the cover plate body 1 through the pressure relief hole 23, and air is inflated inward from the end of the air permeable portion 113, so that the sealing performance of the connector 2 can be detected.

[0046] A fixing platform 114 is arranged on the top of the through hole 111 , and a waterproof breathable membrane 3 is pasted on the edge surface of the fixing platform 114 . The waterproof breathable membrane 3 can cover the cross-sectional diameter of the through hole 111 .

[0047] The waterproof breathable membrane 3 blocks the diameter of the through hole 111, allowing air flow to pass through while blocking water molecules from passing through, so that the air pressure and temperature inside and outside the cover plate body 1 are balanced, preventing condensation inside due to the temperature difference between the inside and outside, and blocking external water vapor from entering the inside, which can improve the waterproofness and make the system more stable.

[0048] In detail, the bottom surface of the center block 112 is flush with the outer wall surface of the cover plate body 1 and connected as a whole, and the air permeable portion 113 adopts the groove 1131 and the air hole 1132 to achieve the communication between the accommodating cavity 10 and the cover plate body 1 and the outside.

[0049] Among them, the groove 1131 is formed by the concave outer wall surface of the cover plate body 1, and is radially distributed around the bottom of the central block 112. The groove 1131 can be a U-shaped groove, a winding groove, or a straight inclined groove; the air hole 1132 is constructed inside the through hole 111, and one end of the air hole 1132 is connected to the groove 1131, and the other end is connected to the accommodating cavity 10.

[0050] Regarding the air hole 1132, in one embodiment, refer to the attached Figure 4 Combined with Figure 5 The center block 112 is in a rectangular shape with chamfered corners. The bottom surface of the center block 112 is flush with the outer wall surface of the cover plate body 1.

[0051] The center block 112 is in a rectangular block shape as a whole, and its upper top surface is located below the top opening of the through hole 111. The volume space inside the through hole 111 except the center block 112 forms a redundant cavity 1132a, and the air hole 1132 adopts the redundant cavity 1132a.

[0052] Moreover, the height of the plane where the bottom of the groove 1131 is located is higher than the height of the top surface of the center block 112. In the cross-section of the side view, the cross-section of the groove 1131 cannot be completely blocked by the center block 112, but a drop window is formed on the top, which connects the groove 1131 and the air hole 1132a.

[0053] In this embodiment, the inner diameter of the through hole 111 can be in the shape of a trumpet. The groove 1131 and the center block 112 can not only form a drop window in the cross section, but also form a distance difference along the length direction of the groove 1131, and then form a connected transition space (a part of the air hole 1132a), which not only realizes the gas connection between the inside and outside of the cover plate body 1, but also forms an obstacle space to prevent external impurities, debris, rainwater, etc. from contacting the waterproof and breathable membrane 3 above, and has the function of preventing rainwater and impurities.

[0054] In addition, during the production stage, the groove 1131 can also be used as a positioning groove to position the cover plate body 1, thereby facilitating the molding and forming of the product.

[0055] In other embodiments, Figure 6 As shown in the figure, the center block 112 fills the through hole 111, and the upper top surface of the center block 112 does not exceed the top plane of the through hole 111; the air hole 1132 is composed of a plurality of long grooves 1132b opened inside the center block 112, the top end surface of the long groove 1132b is connected to the accommodating cavity 10, and the bottom end surface of the long groove 1132b is connected to the corresponding groove 1131.

[0056] The shape of the groove path extending through the long groove 1132b connecting the two end chambers is not limited, and may be a vertical cylindrical groove, an inclined cylindrical groove, or a curved cylindrical groove.

[0057] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A millimeter wave radar radome, characterized in that: The invention comprises a plug and a cover plate body having a receiving cavity, wherein the plug is connected to the cover plate body and extends outside the cover plate body, a radar circuit board is received in the receiving cavity, a terminal group having a fisheye structure is inserted through the plug, and the fisheye structure end of the terminal group is interference-fitted with the mounting hole on the radar circuit board; A pressure relief hole and a balancing part are arranged on the cover plate body; The pressure relief hole is constructed on a common side wall of the connector and the cover plate body, and communicates with the accommodating cavity and the through-path cavity inside the connector; the cover plate body can allow internal and external gas to circulate through the balancing portion.

2. The millimeter wave radar radome according to claim 1, characterized in that: The balancing part includes a through hole and a center block; the through hole is constructed on the cover plate body and is placed in the accommodating cavity; the center block is placed in the through hole, and a ventilated part is reserved between the center block and the side wall of the through hole for gas convection inside and outside the cover plate body; A fixing platform is arranged on the top of the through hole, and a waterproof and breathable film is pasted on the surface of the fixing platform. The waterproof and breathable film can cover the cross-sectional diameter of the through hole.

3. The millimeter wave radar radome according to claim 2, characterized in that: The lower bottom surface of the central block is flush with the outer wall surface of the cover plate body and connected as a whole; the air permeable portion adopts a groove and air hole matching manner; The groove is formed by the concave outer wall surface of the cover plate body and is radially arranged on the bottom circumference of the center block; the air hole is constructed inside the through hole, and the bottom of the air hole is connected to the groove, and the top of the air hole is connected to the accommodating cavity.

4. The millimeter wave radar radome according to claim 3, characterized in that: The height of the top surface of the middle block is lower than the height of the upper surface of the through hole, and the volume space inside the through hole except the middle block is removed to form a redundant cavity, and the air hole is formed by the redundant cavity; The height of the plane where the bottom of the groove is located is higher than the height of the top surface of the center block. The bottom of the cross section of the groove is blocked by the center block and a drop window is formed on the top, and the drop window connects the groove and the air hole.

5. The millimeter wave radar radome according to claim 3, characterized in that: The center block fills the through hole, and the upper top surface of the center block does not exceed the top plane of the through hole; the air hole is composed of a plurality of long grooves opened inside the center block, the top end surface of the long groove is connected to the accommodating cavity, and the bottom end surface of the long groove is connected to the groove.

6. The millimeter wave radar radome according to claim 1, characterized in that: The connector includes a connector shell extending to the outside of the cover body, and a baffle arranged in the connector shell, the baffle seals the through-path cavity of the connector shell and the docking window of the cover body; the pressure relief hole is constructed on the baffle along the thickness direction of the baffle.

Images