CN220019862U

CN220019862U - Radar sensor and motor vehicle

Info

Publication number: CN220019862U
Application number: CN202321654816.7U
Authority: CN
Inventors: 潘君; 韩飞; 金卫斌; 许少飞
Original assignee: Zhejiang Huaruijie Technology Co ltd
Current assignee: Zhejiang Huaruijie Technology Co ltd
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2023-11-14
Anticipated expiration: 2033-06-27

Abstract

The utility model relates to the technical field of vehicles, and discloses a radar sensor and a motor vehicle, wherein the radar sensor comprises: the antenna comprises a rear shell, an antenna housing, a circuit board and a connecting assembly; the antenna housing is arranged opposite to the bottom wall of the rear shell, an accommodating space is formed by the antenna housing and the rear shell, and the circuit board is positioned in the accommodating space; the connecting assembly comprises a plurality of first fish-eye connecting needle pieces, wherein each first fish-eye connecting needle piece penetrates through the circuit board and penetrates through the bottom wall of the rear shell; one end of each first fish-eye connecting needle piece is provided with a first fish-eye needle head which is positioned on one side of the circuit board, which is away from the bottom wall of the rear shell, and is clamped with the circuit board, and the other end of each first fish-eye connecting needle piece is provided with a PIN needle. And a switching circuit is not required to be arranged, and a circuit board and a PIN needle are not required to be fixed respectively.

Description

Radar sensor and motor vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a radar sensor and a motor vehicle.

Background

Radar sensors are used in vehicles such as motor vehicles, and have important roles in detecting and identifying road conditions, and particularly, along with the development of automatic driving technology, the radar sensors are widely applied to the motor vehicles.

In the related technical scheme of the radar sensor, the PIN needle of the connector needs wave soldering, the circuit board is fixed with the shell, and the assembly between the PIN needle and the circuit board is complex, more procedures and high cost.

Disclosure of Invention

The utility model discloses a radar sensor and a motor vehicle, which are used for relieving the problems of complex assembly, multiple procedures and high cost between a PIN needle and a circuit board due to the fixation of the circuit board and a shell.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

in a first aspect, there is provided a radar sensor comprising: the antenna comprises a rear shell, an antenna housing, a circuit board and a connecting assembly; the antenna housing is arranged opposite to the bottom wall of the rear shell, an accommodating space is formed by the antenna housing and the rear shell, and the circuit board is positioned in the accommodating space; the connecting assembly comprises a plurality of first fish-eye connecting needle pieces, wherein each first fish-eye connecting needle piece penetrates through the circuit board and penetrates through the bottom wall of the rear shell; one end of each first fish-eye connecting needle piece is provided with a first fish-eye needle head which is positioned on one side of the circuit board, which is away from the bottom wall of the rear shell, and is clamped with the circuit board, and the other end of each first fish-eye connecting needle piece is provided with a PIN needle.

During assembly, only the first fish-eye connecting needle part is required to penetrate through the bottom walls of the circuit board and the rear shell respectively, and the following aspects are realized simultaneously: directly forming a PIN needle by using a first fish-eye connecting needle part, wherein the first fish-eye connecting needle part is electrically connected with the circuit board, and a switching circuit is not required to be additionally arranged to connect the circuit board and the PIN needle; the first fish-eye connecting needle piece is used for fixing the circuit board and the rear shell, the circuit board and the rear shell are not required to be additionally fixed by screws and the like, and the PIN needle is not required to be additionally fixed by welding and the like. The scheme has the advantages of quick and reliable assembly and low cost.

Optionally, the connection assembly further includes at least two second fisheye connection needle members, the second fisheye connection needle members and the first fisheye connection needle members are arranged at two ends of the circuit board at intervals, and every two second fisheye connection needle members are arranged at intervals; each second fish-eye connecting pin penetrates through the circuit board and is electrically connected with a grounding layer of the circuit board; one end of each second fish-eye connecting needle piece is provided with a second fish-eye needle head which is positioned on one side of the circuit board, which is away from the bottom wall of the rear shell, and is clamped with the circuit board, and the other end of each second fish-eye connecting needle piece is inserted into the bottom wall of the rear shell.

Optionally, the first fisheye connection needle and the second fisheye connection needle are integrally injection molded to the bottom wall of the rear housing.

Optionally, a first chip and a first shielding cover are arranged on the surface of the circuit board facing the bottom wall of the rear shell, and the first chip is positioned in the first shielding cover; the radar sensor further comprises a metal heat dissipation structural member which is thermally pressed on the bottom wall of the rear shell, and the first shielding cover is in heat conduction contact with the metal heat dissipation structural member through a thermal interface material.

Optionally, the radar sensor further comprises a metal elastic support piece, and the metal elastic support piece is elastically supported between the circuit board and the metal heat dissipation structural member;

and the metal elastic supporting piece is respectively and electrically connected with the circuit board and the metal heat dissipation structural member.

Optionally, graphite sheets are filled between the metal heat dissipation structural member and the bottom wall of the rear shell.

Optionally, a second chip and a second shielding cover are arranged on the circuit board, and the second chip is positioned in the second shielding cover; the antenna housing is towards the surface integral type of circuit board is fixed with the wave absorbing cover, the wave absorbing cover with the wave beam of main antenna is at least partly not overlapped, the second chip with the second shield cover all is located between the wave absorbing cover with the circuit board.

Optionally, the wave absorbing cover is blanched on the antenna cover.

Optionally, the wave absorbing cover is formed with a recess, and the second shielding cover is located in a space surrounded by the recess.

Optionally, a blocking block is formed on the surface of the wave absorbing cover, and the blocking block abuts against the circuit board.

Optionally, the backshell is equipped with the intercommunication accommodation space and outer space's air flue, the air flue is located the opening of accommodation space is fixed with the ventilated membrane through the gum.

In a second aspect, there is provided a motor vehicle comprising: the radar sensor according to any one of the above aspects.

The motor vehicle has the same advantages as the radar sensor described above over the prior art and will not be described in detail here.

Drawings

FIG. 1 is an exploded view of a radar sensor provided in an embodiment of the present utility model;

FIG. 2 shows an assembled perspective view of the radar sensor of FIG. 1;

FIG. 3 shows an assembled top view of the radar sensor of FIG. 1;

FIG. 4 is a schematic view showing the internal structure of the radar sensor shown in FIG. 3;

FIG. 5 shows a longitudinal cross-sectional view of the radar sensor shown in FIG. 3;

fig. 6 is a schematic diagram showing the structure of the second fisheye connection pin 12 in fig. 5;

fig. 7 is a schematic diagram showing the configuration of the cooperation of the radome 2 and the radome 1 in the radar sensor shown in fig. 5.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In connection with fig. 1 to 7:

the radar sensor provided by the embodiment of the utility model can be specifically a wave millimeter wave radar sensor, which comprises: a rear case 11, a radome 1, a circuit board 4 and a connection assembly; the antenna housing 1 is arranged opposite to the bottom wall 111 of the rear housing 11 and forms an accommodating space U with the rear housing 11, the circuit board 4 is positioned in the accommodating space U to form physical protection for the circuit board 4, the bottom wall 111 of the rear housing 11 is provided with a plug 112 protruding towards the direction away from the antenna housing 1, the opening direction of the plug 112 is away from the bottom wall 111 of the rear housing 11, and the plug 112 is plugged in and pulled out along the direction perpendicular to the bottom wall 111 of the rear housing 11, so that the radar sensor and an external device 14 (a side cable end of a motor vehicle) can be electrically connected for transmitting signals or electric energy; the connection assembly includes a plurality of first fisheye connection pins 13, each first fisheye connection pin 13 penetrating through the circuit board 4 and electrically connected with the circuit board 4, and penetrating through the bottom wall 111 of the rear case 11 and being fixed with the bottom wall 111 of the rear case 11; one end of each first fisheye-connection PIN 13 is formed with a first fisheye-shaped needle 131 which is positioned on one side of the circuit board 4 away from the bottom wall 111 of the rear housing 11 and is clamped with the circuit board 4, and the other end is positioned in the plug 112 and forms a PIN 132 of the plug 112. The main antenna of the radar sensor is arranged on the circuit board 4 so as to form a radiating structure with the metal on the circuit board 4, transmitting and receiving signals. The radio frequency transceiver may be located on the circuit board 4 and is in signal connection with the main antenna to control the transceiving of signals. The first fisheye connection PIN 13 may be perpendicular to the bottom wall 111 and aligned with the protruding direction of the plug 112, so that the PIN 132 may be smoothly inserted or extracted when the plug 112 is inserted or extracted.

At the time of assembly, only the bottom wall 111 of the circuit board 4 and the rear case 11 needs to be penetrated by the first fisheye connection pin 13, respectively, while the following aspects are achieved: the PIN needle 132 of the plug 112 is directly formed by the first fisheye connection needle piece 13, the first fisheye connection needle piece 13 is electrically connected with the circuit board 4, and the switching circuit is not required to be additionally arranged to connect the circuit board 4 and the PIN needle 132; the first fisheye connection PIN 13 fixes the circuit board 4 and the rear case 11, and no additional screws or the like are needed to fix the circuit board 4 and the rear case 11, and no additional welding or the like is needed to fix the PIN 132. The scheme has the advantages of quick and reliable assembly and low cost.

The radome 1 and the backshell 11 can be through laser penetration type welded fixed connection, and radome 1 and backshell 11 are made by plastics, need not to increase extra waterproof part, and fully isolate external moisture and get into accommodation space U inside for the protection level can reach IP69K, not only satisfies the harsh demand of equipment to on-vehicle impact, vibration, has played fine shielding and radiating effect moreover, thereby improves radar sensor overall reliability, provides reliable guarantee for radar sensor's long-term use. The number of the structural parts is further simplified, so that the assembly process can be effectively reduced, and the labor cost is reduced.

In a specific embodiment, the connection assembly further includes at least two second fisheye connection pins 12, where two second fisheye connection pins 12 are illustrated as an example, the second fisheye connection pins 12 and the first fisheye connection pins 13 are disposed at two ends of the circuit board 4 at intervals, for example, distributed on two opposite sides of the circuit board 4 in the length direction, so as to provide uniform and stable support for the circuit board 4 in the length direction, and the first fisheye connection pins 13 are concentrated at a middle position of corresponding edges of the circuit board 4, and are disposed at intervals between every two second fisheye connection pins 12 so as to provide uniform and stable support for the end of the circuit board 4; each second fish-eye connecting pin 12 penetrates through the circuit board 4 and is connected with a grounding layer of the circuit board 4 to ground the circuit board 4; one end of each second fish-eye connecting needle piece 12 is provided with a second fish-eye needle 131 which is positioned on one side of the circuit board 4, deviating from the bottom wall 111 of the rear shell 11, and is clamped with the circuit board 4, the outer diameter of the second fish-eye needle 131 is larger than a corresponding through hole of the circuit board 4, the second fish-eye needle 131 expands after passing through the through hole, the outer diameter after expanding is larger than the through hole on the circuit board 4, the other end of the second fish-eye needle is inserted into the bottom wall 111 of the rear shell 11, a mounting seat with a jack is specifically arranged on the bottom wall 111, and the end of the second fish-eye needle 131 is inserted into the jack of the mounting seat to realize fixation. When the bottom wall 111 is provided with a device, the device and the circuit board 4 can be electrically connected by the second fish-eye needle 131, respectively, and the device and the circuit board can be fixed and simultaneously act as a wire. Similar to the first fisheye-connection pin 13, the second fisheye-connection pin 12 also has the characteristics of easy assembly, reliable assembly, and low cost.

The circuit board 4 is fixed on the rear shell 11 through the first fish-eye connecting needle piece 13 and the second fish-eye connecting needle piece 12 without welding and pressing, and the circuit board 4 is locked and fixed by the retaining force formed by structural deformation of the first fish-eye needle 121 and the second fish-eye needle 131.

In a specific embodiment, the first fisheye connection pin 13 and the second fisheye connection pin 12 are integrally molded on the bottom wall 111 of the rear housing 11 so as to achieve a more stable connection with the rear housing 11, and when assembling, the circuit board 4 only needs to be assembled on the first fisheye connection pin 13 and the second fisheye connection pin 12.

In a specific embodiment, the surface of the circuit board 4 facing the bottom wall 111 of the rear case 11 is provided with a first chip 51 and a first shielding case 5, and the first chip 51 is located in the first shielding case 5 to prevent the external electromagnetic wave from causing signal interference to the first chip 51 and affecting the working performance of the first chip 51; the radar sensor further comprises a metal heat dissipation structural member 8 which is thermally pressed on the bottom wall of the rear shell 11, and the first shielding cover 5 is in heat conduction contact with the metal heat dissipation structural member 8 through a thermal interface material, so that heat generated during the operation of the first chip 51 can be timely dissipated. The first shielding case 5 and the bottom wall 111 limit the metal heat dissipation structural member 8 therebetween, and further play a role in limiting and fixing. The bottom wall 111 of the rear shell 11 can be fixedly connected with the metal heat dissipation element 8 by adopting a hot stamping process.

In a specific embodiment, the radar sensor further comprises a metal elastic support member 6, and the metal elastic support member 6 is elastically supported between the circuit board 4 and the metal heat dissipation structural member 8; and the metal elastic support member 6 is electrically connected with the circuit board 4 and the metal heat dissipation structure member 8, respectively. The elasticity of the metal elastic support piece 6 enables the metal elastic support piece to be always attached to the circuit board 4 and the metal heat dissipation structural member 8, so that the lap joint reliability is enhanced, and the contact resistance is reduced. The external metal part (here, the metal heat dissipation structural part 8) of the circuit board 4 and the circuit board 4 are combined to form an equipotential body, so that the electromagnetic immunity of the whole radar sensor is enhanced. The metal elastic support 6 may be a coil spring, a reed, or the like. The number of the metal elastic support members 6 is at least one, and when one metal elastic support member 6 is used, the metal elastic support member can be supported at the middle position of the circuit board 4 so as not to incline the circuit board 4. When a plurality of metal elastic supporting members 6 are adopted, the metal elastic supporting members 6 can be distributed at intervals to provide stable support, and can be particularly uniformly distributed, so that the stress on the circuit board 4 is uniform everywhere, and the circuit board 4 is not easy to incline. The metal heat dissipation structure 8 can be made of copper or other materials with good heat conduction performance, so that the metal heat dissipation structure can perform sufficient heat dissipation while playing a supporting role. The heat conducting pads 7 can be further arranged between the metal heat radiating structural member 8 and the circuit board 4, the number of the heat conducting pads 7 can be multiple, two in the figure are taken as an example, and the heat conducting pads 7 are beneficial to the sufficient heat radiation of the metal heat radiating structural member 8 to the circuit board 4.

In a specific embodiment, graphite sheets 9 are filled between the metal heat dissipating structure 8 and the bottom wall 111 of the rear case 11 to reduce the thermal resistance of the metal heat dissipating structure 8 to dissipate heat outwards by means of the rear case 11.

In a specific embodiment, the circuit board 4 is provided with a second chip 31 and a second shielding case 3, and the second chip 31 is located in the second shielding case 3 to prevent external signals from interfering with the second chip 31 and affecting the working performance of the second chip 31; the radome 1 is fixed with the radome 2 towards the surface integral type of circuit board 4, if the radome 2 can be scalded in advance in radome 1, reduce the degree of difficulty of assembly radar sensor, the wave beam of radome 2 and main antenna is at least partly non-overlapping, so as to avoid radome 2 to shield main antenna completely, make main antenna have sufficient radiation or the space of received signal, second chip 31 and second shield 3 all are located between radome 2 and circuit board 4, the wave beam of radome 2 and antenna can be completely non-overlapping, so that the wave beam is avoided letting down the radome 2 completely, avoid being shielded. The wave absorbing cover 2 can absorb interference radar waves, eliminate interference signals in received signals as much as possible, better block coupling paths between parts (the first chip 51 and the second chip 31) in the accommodating space and other devices on the circuit board 4 and off-board metals, reduce electromagnetic radiation, improve EMC performance and provide a relatively stable overall working environment.

The first shield 5, the first chip 51, the second shield 3, the second chip 31 and the metal elastic support 6 may be assembled on the circuit board 4 by SMT (english full name: surface Mount Technology; chinese name: surface mount technology).

In a specific embodiment, the wave-absorbing cover 2 is formed with a recess T, and the second shielding cover 3 is located in a space surrounded by the recess T, and is wrapped by the wave-absorbing cover 2, so as to more fully shield the second chip 31 in the circumferential direction, and ensure the working performance of the second chip 31.

In a specific embodiment, a raised blocking piece 21 is formed on the surface of the radome 2, and the blocking piece 21 abuts against the circuit board 4, so that the radome 1 and the radome 2 are utilized to position the circuit board 4 of radar frequency in the thickness direction.

In a specific embodiment, the rear case 11 is provided with an air passage 101 communicating the accommodating space U with the outside space for gas exchange, and the air passage 101 is provided with an opening in the accommodating space U to which the air permeable membrane 10 is fixed by a back adhesive. The breathable film 10 is placed inside the rear case 11 to prevent the breathable film 10 from being rubbed or attached by an electric adsorption effect, and the breathable film 10 is kept effective.

Based on the same inventive concept, the embodiment of the utility model also provides a motor vehicle, which comprises: the radar sensor described in the above embodiment. The beneficial effects of the sensor are shown in the radar sensor, and are not described herein.

It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present utility model without departing from the spirit and scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A radar sensor, comprising: the antenna comprises a rear shell, an antenna housing, a circuit board and a connecting assembly;

the antenna housing is arranged opposite to the bottom wall of the rear shell, an accommodating space is formed by the antenna housing and the rear shell, and the circuit board is positioned in the accommodating space;

the connecting assembly comprises a plurality of first fish-eye connecting needle pieces, wherein each first fish-eye connecting needle piece penetrates through the circuit board and penetrates through the bottom wall of the rear shell;

one end of each first fish-eye connecting needle piece is provided with a first fish-eye needle head which is positioned on one side of the circuit board, which is away from the bottom wall of the rear shell, and is clamped with the circuit board, and the other end of each first fish-eye connecting needle piece is provided with a PIN needle.

2. The radar sensor of claim 1, wherein the connection assembly further comprises at least two second fisheye connection pins, the second fisheye connection pins and the first fisheye connection pins are arranged at two ends of the circuit board at intervals, and each two second fisheye connection pins are arranged at intervals;

each second fish-eye connecting pin penetrates through the circuit board and is electrically connected with a grounding layer of the circuit board;

one end of each second fish-eye connecting needle piece is provided with a second fish-eye needle head which is positioned on one side of the circuit board, which is away from the bottom wall of the rear shell, and is clamped with the circuit board, and the other end of each second fish-eye connecting needle piece is inserted into the bottom wall of the rear shell.

3. The radar sensor of claim 2, wherein the first and second fisheye connection pins are integrally injection molded to the bottom wall of the rear housing.

4. A radar sensor according to any one of claims 1 to 3, wherein a surface of the circuit board facing the bottom wall of the rear housing is provided with a first chip and a first shield, the first chip being located within the first shield;

the radar sensor further comprises a metal heat dissipation structural member which is thermally pressed on the bottom wall of the rear shell, and the first shielding cover is in heat conduction contact with the metal heat dissipation structural member through a thermal interface material.

5. The radar sensor of claim 4, further comprising a metal spring support, the metal spring support being resiliently supported between the circuit board and the metal heat dissipating structure;

6. The radar sensor of claim 4, wherein a graphite sheet is filled between the metallic heat dissipating structure and the bottom wall of the rear housing.

7. A radar sensor according to any one of claims 1 to 3, wherein a second chip and a second shield are provided on the circuit board, the second chip being located within the second shield;

the wave absorbing cover is integrally fixed on the surface of the antenna housing, facing the circuit board, of the antenna housing, the wave absorbing cover is at least partially not overlapped with the wave beam of the main antenna on the circuit board, and the second chip and the second shielding cover are both positioned between the wave absorbing cover and the circuit board.

8. The radar sensor according to claim 7, wherein the wave-absorbing cover is formed with a recess, and the second shielding cover is located in a space surrounded by the recess.

9. The radar sensor of claim 7, wherein the wave absorbing cover surface is formed with a blocking block, the blocking block abutting the circuit board.

10. A motor vehicle, comprising: the radar sensor of any one of claims 1 to 9.