A kind of multi-layer composite assembly device of radio frequency front end module and antenna unit in millimeter wave radar

Abstract

The application discloses a kind of millimeter wave radar in radio frequency front end module and the multilayer composite assembly device of antenna unit, including mainboard and floating plate, the middle place of the mainboard is equipped with installation port, vice plate is set in installation port, spring wire is connected between vice plate and mainboard, radio frequency module is installed on the upper surface of vice plate, and antenna module is installed on the lower surface, the four corners of installation port are thickened to form connecting portion, connecting portion is equipped with connecting slot, connecting slot is equipped with locating seat, the end surface of locating seat exposed is equipped with shaft hole, shaft rod is installed in the place of shaft hole opposite to vice plate, the other end of shaft rod is inserted into shaft hole, and locating block for positioning shaft rod is installed on locating seat.The application has simple structure, and through the cooperation of separable shaft rod, locating seat, multi-angle limiting slot and locating block locking and movable baffle, the quick overall disassembly detection and flexible angle fine adjustment function of vice plate and radio frequency / antenna module thereon are realized.

Description

Technical Field

[0001] This invention relates to the field of millimeter-wave radar technology, and specifically to a multi-layer composite assembly device for radio frequency front-end modules and antenna units in millimeter-wave radar. Background Technology

[0002] Millimeter-wave radar is a radar system that uses electromagnetic waves with wavelengths between 1 and 10 millimeters (frequency 30 to 300 GHz) for detection. It measures information such as target distance, speed, and angle by emitting millimeter waves and receiving the echoes reflected from the target.

[0003] Currently, the radio frequency front-end module and antenna unit installed inside millimeter-wave radar are generally directly fixed to the motherboard. After the motherboard is fixed to the radar housing with screws, it cannot be rotated. After the antenna unit is installed, its installation angle needs to be adjusted, calibrated or precisely fixed. The accuracy of the installation angle directly determines the reliability of radar measurement. Direct fixing will affect subsequent adjustments and operations such as testing of the radio frequency front-end module and antenna unit. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a multi-layer composite assembly device for a radio frequency front-end module and an antenna unit in a millimeter-wave radar. The radio frequency module and the antenna module are mounted on a sub-plate, which can be independently disassembled and its angle adjusted, thereby solving the problems mentioned in the background art.

[0005] This invention is achieved through the following technical solution: a multi-layer composite assembly device for a radio frequency front-end module and an antenna unit in a millimeter-wave radar, comprising a main board and a floating plate. The main board has a mounting port in the middle, and a sub-board is disposed in the mounting port. A spring wire connects the sub-board and the main board. A radio frequency module is mounted on the upper surface of the sub-board, and an antenna module is mounted on the lower surface. The four corners of the mounting port are thickened to form connecting parts, and each connecting part has a connecting groove. Each connecting groove has a positioning seat, and each positioning seat has a shaft hole on its exposed end face. A shaft is mounted on the sub-board directly opposite the shaft hole, and the other end of each shaft is inserted into the shaft hole. A positioning block is mounted on each positioning seat to position the shaft.

[0006] As a preferred technical solution, the side of the connecting part facing the upper surface of the motherboard is provided with a positioning channel that communicates with the outside. The outer ring of the positioning seat protrudes to form a positioning part, which is slidably disposed in the positioning channel.

[0007] As a preferred technical solution, each positioning part is provided with a limiting channel that communicates with the shaft hole vertically, and each outer ring surface of the shaft is provided with multiple limiting grooves that are evenly distributed in a ring structure. One end of each positioning block protrudes from the limiting channel, and the other end passes through the limiting channel and is inserted into the corresponding limiting groove. The positioning block and the positioning part are fixedly connected by a torsion spring hinge.

[0008] As a preferred technical solution, a clearance space is formed between the end of the positioning seat away from the shaft hole and the deepest part of the connecting groove, allowing the positioning seat to move outward and disengage from the shaft. A first compression spring is provided in each clearance space, with one end of each first compression spring installed on the positioning seat and the other end installed in the connecting groove.

[0009] As a preferred technical solution, each of the connecting parts has a positioning port on the side facing the upper surface of the motherboard, and a baffle is provided between the longitudinally opposite positioning ports. One side of each baffle is set to abut against the end face opposite to the positioning seat. Positioning rods are installed vertically on both ends of each baffle facing the motherboard. Positioning holes are provided on the upper surface of the motherboard directly opposite the positioning rods. The other end of each positioning rod is inserted into the positioning hole and is equipped with a second compression spring. The other end of each second compression spring is installed on the inner wall of the positioning hole.

[0010] As a preferred technical solution, the upper and lower surfaces of the sub-board are flush with the upper and lower surfaces of the main board.

[0011] As a preferred technical solution, gaps are formed between the four sides of the sub-plate and the inner wall of the mounting opening to allow the sub-plate to rotate.

[0012] As a preferred technical solution, both the positioning seat and the shaft are made of metal, while the connection points between the main board and the sub-board and the positioning seat and the shaft are made of insulating material.

[0013] The beneficial effects of this invention are: the invention has a simple structure, the radio frequency module and the antenna module are mounted on the sub-board, the sub-board is set independently, after the positioning seat is pushed outward, the sub-board can be taken out independently from the mounting port, and it can be tested without disassembling the main board by stretching the spring wire. After pushing the positioning seat outward at either end, the angle of the sub-board, radio frequency module and antenna module can be adjusted by the remaining two shafts, which increases adaptability, and the rotating sub-board can be positioned by the positioning block. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a bottom view of the present invention; Figure 3 This is a schematic diagram of the positioning base of the present invention; Figure 4 This is a schematic diagram of the structure of the shaft and positioning block of the present invention; Figure 5 This is a schematic diagram of the sub-plate and positioning seat of the present invention; Figure 6 This is a schematic diagram of the structure of the shaft of the present invention; Figure 7 This is a schematic diagram of the structure of the present invention after the angle of the sub-plate is adjusted.

[0016] The components are as follows: 1. Main board; 2. Sub-board; 3. RF module; 4. Positioning seat; 5. Baffle; 6. Connecting part; 7. Antenna module; 8. Positioning part; 9. Positioning block; 10. Positioning port; 11. First compression spring; 12. Positioning hole; 13. Mounting port; 14. Shaft; 15. Limiting groove; 16. Limiting channel; 17. Shaft hole. Detailed Implementation

[0017] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0018] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a multi-layer composite assembly device for a radio frequency front-end module and an antenna unit in a millimeter-wave radar includes a main board 1 and a floating plate. The main board 1 has a mounting port 13 in the middle, and a sub-board 2 is disposed in the mounting port 13. A spring wire connects the sub-board 2 and the main board 1. A radio frequency module 3 is mounted on the upper surface of the sub-board 2, and an antenna module 7 is mounted on the lower surface. The four corners of the mounting port 13 are thickened to form connecting parts 6. Each connecting part 6 has a connecting groove, and each connecting groove has a positioning seat 4. Each exposed end face of the positioning seat 4 has a shaft hole 17. A shaft 14 is mounted on the sub-board 2 opposite to the shaft hole 17. The other end of the shaft 14 is inserted into the shaft hole 17. Each positioning seat 4 has a positioning block 9 for positioning the shaft 14.

[0020] In this embodiment, the connecting part 6 is provided with a positioning channel communicating with the outside on the side facing the upper surface of the motherboard 1. The outer ring of the positioning seat 4 protrudes to form a positioning part 8 opposite to the positioning channel, and the positioning part 8 is slidably disposed in the positioning channel.

[0021] In this embodiment, each positioning part 8 is provided with a limiting channel 16 that communicates with the shaft hole 17. Each outer ring surface of the shaft rod 14 is provided with a plurality of limiting grooves 15 that are evenly distributed in an annular structure. One end of each positioning block 9 protrudes from the limiting channel 16, and the other end passes through the limiting channel 16 and is inserted into the corresponding limiting groove 15. The positioning block 9 and the positioning part 8 are fixedly connected by a torsion spring hinge.

[0022] In this embodiment, a clearance space is formed between the end of the positioning seat 4 away from the shaft hole 17 and the deepest part of the connecting groove, allowing the positioning seat 4 to move outward and disengage from the shaft 14. A first compression spring 11 is provided in the clearance space. One end of the first compression spring 11 is installed on the positioning seat 4, and the other end is installed in the connecting groove.

[0023] In this embodiment, the connecting part 6 is provided with a positioning port 10 on the side facing the upper surface of the main board 1. A baffle 5 is provided between the longitudinally opposite positioning ports 10. One side of the baffle 5 is in contact with the opposite end face of the positioning seat 4. Positioning rods are vertically installed on both ends of the baffle 5 facing the main board 1. Positioning holes 12 are provided on the upper surface of the main board 1 directly opposite the positioning rods. The other end of the positioning rods is inserted into the positioning holes 12 and a second compression spring is installed on each of them. The other end of the second compression spring is installed on the inner wall surface of the positioning hole 12. The baffle plate can abut the opposite end face of the positioning seat, preventing the positioning seat from detaching from the shaft, thus ensuring that the shaft can be inserted into the shaft hole and preventing it from detaching on its own.

[0024] In this embodiment, the upper and lower surfaces of the sub-board 2 are flush with the upper and lower surfaces of the main board 1.

[0025] In this embodiment, gaps are formed between the four sides of the sub-plate 2 and the inner wall of the mounting opening 13 to allow the sub-plate 2 to rotate, so that the sub-plate can be rotated and removed smoothly, avoiding being stuck.

[0026] In this embodiment, the positioning seat 4 and the shaft 14 are both made of metal, while the connection parts 6 between the main board 1 and the sub-board 2 and the positioning seat 4 and the shaft 14 are all made of insulating material. The positioning seat 4 and the shaft 14 are made of metal to ensure structural strength, while the connection parts between them and the main board 1 and the sub-board 2 are isolated by insulating material to prevent the formation of unnecessary electrical paths or interference.

[0027] Working principle: In the initial assembly state, the sub-board 2 is inserted into the shaft holes 17 of the corresponding positioning seats 4 through the four corner shafts 14, so as to realize the installation of the sub-board 2 in the mounting port 13 of the main board 1. At this time, under the action of the torsion spring hinge, the end of the positioning block 9 is embedded in a certain limiting groove 15 of the shaft 14, locking the relative position of the shaft 14 and the positioning seat 4, so that the sub-board 2, the radio frequency module 3 and the antenna module 7 are fixed relative to the main board 1.

[0028] The baffle 5 is pressed tightly against the end face of the positioning seat 4 under the action of the second compression spring, preventing the positioning seat 4 from accidentally sliding outward under the action of external force, which would cause the shaft 14 to detach.

[0029] When it is necessary to test or maintain the RF module 3 or antenna module 7 installed on the sub-board 2, it is not necessary to disassemble the entire main board 1. The operator can first lift the baffle 5 upwards to make it overcome the elastic force of the second compression spring and disengage from the end face of the positioning seat 4. Then, the four positioning seats 4 can be pushed outwards (i.e. away from the center of the sub-board 2) simultaneously or in sequence. The positioning seats 4 slide along the positioning channel and compress the first compression spring 11 on its back, so that the shaft hole 17 gradually separates from the shaft 14.

[0030] After all the shafts 14 have been dislodged from the shaft holes 17, the sub-plate 2 is completely detached from the main plate 1. At this time, the sub-plate 2 is still electrically connected to the main plate 1 through the spring wire. The operator can pull it out to a suitable position for inspection, repair or replacement. After the inspection is completed, the sub-plate 2 is put back into the mounting port 13, the shafts 14 and shaft holes 17 are realigned, the positioning seat 4 is released, and under the reset action of the first compression spring 11, the positioning seat 4 moves inward so that the shaft hole 17 re-fits the shaft 14. Finally, the baffle 5 is released to reset it.

[0031] When the installation angle of antenna module 7 needs fine-tuning, calibration, or precise setting according to the application scenario, local angle adjustment can be performed. For example... Figure 7 As shown, the operator first lifts and removes the baffle 5 corresponding to the direction to be adjusted (for example, if the auxiliary plate 2 is to be adjusted to rotate around a diagonal, the baffles 5 at both ends of the diagonal are removed).

[0032] Then, push the two positioning seats 4 corresponding to the baffle 5 outward so that its shaft hole 17 is disengaged from the shaft 14. At this time, the sub-plate 2 is only connected to the positioning seat 4 through the other two unoperated shafts 14. Since there is a gap between the side of the sub-plate 2 and the inner wall of the mounting port 13, the sub-plate 2 can rotate around the axis formed by the remaining two shafts 14 at a certain angle.

[0033] During rotation, different limiting grooves 15 on the shaft 14 will be opposite to the end of the positioning block 9. After rotating to the required angle, the positioning block 9 will automatically spring into the currently aligned limiting groove 15 under the action of the torsion spring hinge, locking the shaft 14 (and the sub-plate 2) at a new angle position, which can realize the angle adjustment of different axes.

[0034] Throughout the adjustment or disassembly process, the sub-board 2 and the main board 1 are always electrically connected by a flexible spring wire to ensure that the signal transmission between the RF module 3 and other circuits on the main board 1 is uninterrupted.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A multi-layer composite assembly device for radio frequency front-end module and antenna unit in millimeter-wave radar, characterized in that: The system includes a main board (1) and a floating plate. The main board (1) has a mounting port (13) in the middle. The sub-board (2) is set in the mounting port (13). A spring wire connects the sub-board (2) and the main board (1). The upper surface of the sub-board (2) is equipped with a radio frequency module (3) and the lower surface is equipped with an antenna module (7). The four corners of the mounting port (13) are thickened to form a connecting part (6). The connecting part (6) is equipped with a connecting groove. The connecting groove is equipped with a positioning seat (4). The exposed end face of the positioning seat (4) is equipped with a shaft hole (17). The sub-board (2) is equipped with a shaft rod (14) opposite to the shaft hole (17). The other end of the shaft rod (14) is inserted into the shaft hole (17). The positioning seat (4) is equipped with a positioning block (9) to position the shaft rod (14).

2. The multi-layer composite assembly device for radio frequency front-end module and antenna unit in millimeter-wave radar according to claim 1, characterized in that: The connecting part (6) is provided with a positioning channel communicating with the outside on the side facing the upper surface of the main board (1). The outer ring of the positioning seat (4) protrudes to form a positioning part (8) opposite the positioning channel. The positioning part (8) is slidably disposed in the positioning channel.

3. The multi-layer composite assembly device for the radio frequency front-end module and antenna unit in millimeter-wave radar according to claim 2, characterized in that: Each positioning part (8) is vertically provided with a limiting channel (16) communicating with the shaft hole (17). The outer ring surface of the shaft (14) is provided with multiple limiting grooves (15) evenly distributed in a ring structure. One end of each positioning block (9) protrudes from the limiting channel (16), and the other end passes through the limiting channel (16) and is inserted into the corresponding limiting groove (15). The positioning block (9) and the positioning part (8) are fixedly connected by a torsion spring hinge.

4. The multi-layer composite assembly device for radio frequency front-end module and antenna unit in millimeter-wave radar according to claim 1, characterized in that: The end of the positioning seat (4) away from the shaft hole (17) and the deepest part of the connecting groove form a clearance space for the positioning seat (4) to move outward and disengage from the shaft (14). A first compression spring (11) is provided in the clearance space. One end of the first compression spring (11) is installed on the positioning seat (4), and the other end is installed in the connecting groove.

5. The multi-layer composite assembly device for radio frequency front-end module and antenna unit in millimeter-wave radar according to claim 1, characterized in that: The connecting part (6) is provided with a positioning port (10) on the side facing the upper surface of the main board (1). A baffle (5) is provided between the longitudinally opposite positioning ports (10). One side of the baffle (5) is in contact with the opposite end face of the positioning seat (4). Positioning rods are vertically installed on both ends of the baffle (5) facing the main board (1). Positioning holes (12) are provided on the upper surface of the main board (1) directly opposite the positioning rods. The other end of the positioning rods is inserted into the positioning holes (12) and a second compression spring is installed on each of them. The other end of the second compression spring is installed on the inner wall of the positioning hole (12).

6. The multi-layer composite assembly device for radio frequency front-end module and antenna unit in millimeter-wave radar according to claim 1, characterized in that: The upper and lower surfaces of the sub-board (2) are flush with the upper and lower surfaces of the main board (1).

7. The multi-layer composite assembly device for radio frequency front-end module and antenna unit in millimeter-wave radar according to claim 1, characterized in that: A gap is formed between the four sides of the sub-plate (2) and the inner wall of the mounting port (13) for the sub-plate (2) to rotate.

8. The multi-layer composite assembly device for radio frequency front-end module and antenna unit in millimeter-wave radar according to claim 1, characterized in that: The positioning seat (4) and the shaft (14) are both made of metal, while the connection parts (6) between the main board (1) and the sub-board (2) and the positioning seat (4) and the shaft (14) are all made of insulating material.

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