CN214280380U - Low-cost self-adaptation board is to board radio frequency coaxial connector - Google Patents
Low-cost self-adaptation board is to board radio frequency coaxial connector Download PDFInfo
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- CN214280380U CN214280380U CN202120493600.1U CN202120493600U CN214280380U CN 214280380 U CN214280380 U CN 214280380U CN 202120493600 U CN202120493600 U CN 202120493600U CN 214280380 U CN214280380 U CN 214280380U
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Abstract
The utility model discloses a low-cost self-adaptation board is to board radio frequency coaxial connector, including first socket, second socket and intercommunication first socket with the intermediate junction pole of second socket, intermediate junction pole includes inner conductor, casing and sets up the inner conductor with insulator between the casing, the casing with the inner conductor is the stamping workpiece, the inner conductor with the insulator is mold insert injection moulding's integral type structure, the interval is equipped with a plurality of protruding muscle on the periphery wall of insulator, be equipped with on the casing with protruding muscle matched with card is held the portion, the cover is equipped with fixed cover on the periphery wall of casing, fixed cover covers card is held the portion. The utility model provides a low-cost self-adaptation board has reduced the processing degree of difficulty to board radio frequency coaxial connector, and it is convenient to make, wholly easily assembles and suits with automatic rigging equipment, and structural stability is good, compares in current product cost reduction more than 50% when making coaxial connector steady operation.
Description
Technical Field
The utility model relates to a connector technical field especially relates to a low-cost self-adaptation board is to board radio frequency coaxial connector.
Background
With the large-scale application of the MIMO antenna and antenna filter integrated product in the 5G radio frequency system, in order to realize the connection among the amplifier, the filter and the antenna, the usage amount of the connector is increased by several tens of times, which leads to a significant increase in the networking cost of the 5G radio frequency subsystem, and therefore a low-cost connector is required to reduce the construction cost of the 5G radio frequency system so as to facilitate the popularization of the 5G technology.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: a low-cost adaptive board-to-board radio frequency coaxial connector capable of reducing production cost is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a low-cost self-adaptation board is to board radio frequency coaxial connector, includes first socket, second socket and intercommunication first socket with the intermediate junction pole of second socket, the intermediate junction pole includes inner conductor, casing and sets up the inner conductor with insulator between the casing, the casing with the inner conductor is the stamping workpiece, the inner conductor with the insulator is mold insert injection moulding's integral type structure, the interval is equipped with a plurality of protruding muscle on the periphery wall of insulator, be equipped with on the casing with protruding muscle matched with card portion of holding, the cover is equipped with fixed cover on the periphery wall of casing, fixed cover covers card portion of holding.
Further, the outer peripheral wall of the inner conductor has a positioning portion for increasing friction between the inner conductor and the insulator.
Further, the positioning part is a thread-shaped groove.
Furthermore, the two opposite ends of the inner conductor are respectively arc-shaped surfaces, the first socket is provided with a first central needle matched with the inner conductor, and the second socket is provided with a second central needle matched with the inner conductor.
Further, the first socket also comprises a first socket insulator wrapping a part of the first center pin, and a first barb matched with the first socket insulator is arranged on the peripheral wall of the first center pin.
Further, the second socket also comprises a second socket insulator wrapping a part of the second center pin, and a second barb matched with the second socket insulator is arranged on the peripheral wall of the second center pin.
Furthermore, a plurality of first slots arranged along the length direction of the inner conductor are respectively arranged at two opposite ends of the inner conductor.
Furthermore, a plurality of second slots arranged along the length direction of the shell are respectively arranged at two opposite ends of the shell, the first socket is provided with a first outer conductor matched with the shell, and the second socket is provided with a second outer conductor matched with the shell.
Furthermore, one end of the second outer conductor, which is close to the shell, is in a horn shape.
Further, the first outer conductor and the second outer conductor are respectively metal tension pieces.
The beneficial effects of the utility model reside in that: the utility model provides a low-cost self-adaptation board is the stamping workpiece to inner conductor and casing in the intermediate junction pole of board radio frequency coaxial connector, and inner conductor passes through mold insert integrated into one piece that moulds plastics with the insulator, reduce coaxial connector's the processing degree of difficulty, it is convenient to make, insulator and casing are connected with the cooperation of the card portion of holding of setting on the casing through the protruding muscle that sets up on the insulator, make the whole easy assembly of intermediate junction pole and suit with automatic rigging equipment, it makes insulator and shell connection more stable still to have set up fixed cover on the casing, with the overall structure stability of connecting rod in the middle of improving, compare in current product cost reduction more than 50% when making coaxial connector steady operation.
Drawings
Fig. 1 is a partial cross-sectional view of a low-cost adaptive board-to-board radio frequency coaxial connector according to a first embodiment of the present invention;
fig. 2 is an exploded view of a middle connection rod in a low-cost adaptive board-to-board radio frequency coaxial connector according to a first embodiment of the present invention;
fig. 3 is a partial cross-sectional view of a middle connection rod in a low-cost adaptive board-to-board radio frequency coaxial connector according to a first embodiment of the present invention;
fig. 4 is a cross-sectional view of a first socket in a low-cost adaptive board-to-board rf coaxial connector according to a first embodiment of the present invention;
fig. 5 is a cross-sectional view of a second socket in the low-cost adaptive board-to-board rf coaxial connector according to the first embodiment of the present invention.
Description of reference numerals:
1. a first socket; 11. a first outer conductor; 12. a first center needle; 13. a first socket insulator; 14. a first barb; 15. an extension portion; 16. a projection; 2. a second socket; 21. a second outer conductor; 22. a second center needle; 23. a second socket insulator; 24. a second barb; 3. a middle connecting rod; 31. an inner conductor; 32. a housing; 33. an insulator; 34. a rib is protruded; 35. a chucking section; 36. fixing a sleeve; 37. a positioning part; 38. a first slot; 39. and a second slot.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 5, a low-cost adaptive board-to-board radio frequency coaxial connector includes a first socket 1, a second socket 2, and a middle connection rod 3 communicating the first socket 1 and the second socket 2, where the middle connection rod 3 includes an inner conductor 31, a shell 32, and an insulator 33 disposed between the inner conductor 31 and the shell 32, the shell 32 and the inner conductor 31 are stamping parts, the inner conductor 31 and the insulator 33 are integrated structures formed by insert injection molding, a plurality of ribs 34 are disposed at intervals on an outer peripheral wall of the insulator 33, a clamping portion 35 matched with the ribs 34 is disposed on the shell 32, a fixing sleeve 36 is sleeved on the outer peripheral wall of the shell 32, and the clamping portion 35 is covered by the fixing sleeve 36.
The utility model discloses a structural principle brief follows as follows: the low-cost self-adaptive board-to-board radio frequency coaxial connector comprises a first socket 1, a middle connecting rod 3 and a second socket 2 which are sequentially connected in a matching manner, wherein the first socket 1 and the second socket 2 are respectively arranged on two PCBs, the conduction between the first socket 1 and the second socket 2 is realized through the middle connecting rod 3, the middle connecting rod 3 specifically comprises an inner conductor 31, a shell 32 and an insulator 33 arranged between the inner conductor 31 and the shell 32, the inner conductor 31 and the shell 32 are both stamping parts, the inner conductor 31 and the insulator 33 are integrated through insert injection molding, the processing technology of the middle connecting rod 3 is greatly simplified, a plurality of convex ribs 34 are arranged on the peripheral wall of the insulator 33 at intervals, a clamping part 35 matched with the convex ribs 34 is arranged on the shell 32 to realize the stable connection between the insulator 33 and the shell 32, and a fixing sleeve 36 is further sleeved on the peripheral wall of the shell 32 to assist in fixing the connection between the clamping part 35 and the convex ribs 34, make 3 stable in structure of intermediate junction pole, be convenient for assemble to the equipment is assembled to the automatic rigging equipment of accessible, improves assembly efficiency when reducing the human cost.
From the above description, the beneficial effects of the present invention are: the utility model provides a low-cost self-adaptation board has reduced the processing degree of difficulty to board radio frequency coaxial connector, and it is convenient to make, wholly easily assembles and suits with automatic rigging equipment, and structural stability is good, compares in current product cost reduction more than 50% when making coaxial connector steady operation.
Further, the outer peripheral wall of the inner conductor 31 has a positioning portion 37 for increasing friction between the inner conductor 31 and the insulator 33.
Further, the positioning portion 37 is a threaded groove.
As is apparent from the above description, the positioning portion 37 provided on the outer peripheral wall of the outer conductor stabilizes the connection between the inner conductor 31 and the insulator 33, and prevents the inner conductor 31 from being separated from the insulator 33 to damage the intermediate connection rod 3 when the intermediate connection rod 3 is deviated due to the misalignment between the first socket 1 and the second socket 2.
Further, the two opposite ends of the inner conductor 31 are respectively arc-shaped surfaces, the first socket 1 has a first center pin 12 matched with the inner conductor 31, and the second socket 2 has a second center pin 22 matched with the inner conductor 31.
As can be seen from the above description, the end of the inner conductor 31 is configured as an arc-shaped surface, so that after the inner conductor 31 is engaged with the first center pin 12 and the second center pin 22, the inner conductor 31 can rotate relative to the first center pin 12 and/or the second center pin 22, and when the first socket 1 is misaligned with the second socket 2, the inner conductor 31 can still conduct the first center pin 12 with the second center pin 22.
Further, the first socket 1 further comprises a first socket insulator 13 wrapping a portion of the first center pin 12, and the outer peripheral wall of the first center pin 12 has a first barb 14 cooperating with the first socket insulator 13.
Further, the second socket 2 further comprises a second socket insulator 23 wrapping a portion of the second center pin 22, and the outer peripheral wall of the second center pin 22 has a second barb 24 cooperating with the second socket insulator 23.
As can be seen from the above description, the structural stability of the low-cost adaptive board-to-board rf coaxial connector is further improved by providing barbs on the peripheral walls of the first center pin 12 and the second center pin 22 to stably connect the first center pin 12 with the first socket insulator 13 and connect the second center pin 22 with the second socket insulator 23.
Further, opposite ends of the inner conductor 31 are respectively provided with a plurality of first slots 38 arranged along the length direction of the inner conductor 31.
As can be seen from the above description, the end of the inner conductor 31 is provided with the first slot 38, so that the inner conductor 31 can deform to some extent when the inner conductor 31 is engaged with the first central pin 12 and/or the second central pin 22 to ensure stable contact, and poor contact with the first central pin 12 and/or the second central pin 22 when the inner conductor 31 is rotated or tilted can be avoided.
Further, the opposite ends of the housing 32 are respectively provided with a plurality of second slots 39 arranged along the length direction of the housing 32, the first socket 1 is provided with a first outer conductor 11 matched with the housing 32, and the second socket 2 is provided with a second outer conductor 21 matched with the housing 32.
As can be seen from the above description, the second slot 39 is provided at the end of the housing 32, so that the second housing 32 can be deformed to some extent when being matched with the first outer conductor 11 and/or the second outer conductor 21, and the housing 32 can be stably connected with the first outer conductor 11 and/or the second outer conductor 21.
Further, one end of the second outer conductor 21 close to the shell 32 is flared.
As will be appreciated from the above description, the opening of the second outer conductor 21 is arranged to guide the housing 32 in a trumpet shape into the second outer conductor 21, facilitating the mating of the central connecting rod with the second socket 2.
Further, the first outer conductor 11 and the second outer conductor 21 are each a metal drawn piece.
As can be seen from the above description, the first outer conductor 11 and the second outer conductor 21 are formed by a metal drawing process, which is simple to operate and has high production efficiency.
Example one
Referring to fig. 1 to 5, a first embodiment of the present invention is: as shown in fig. 1, a low-cost adaptive board-to-board radio frequency coaxial connector includes a first socket 1, a second socket 2, and an intermediate connecting rod 3 disposed between the first socket 1 and the second socket 2 to connect the first socket 1 and the second socket 2, where the first socket 1 and the second socket 2 are respectively disposed on two PCBs to be connected, and the two PCBs can be connected by connecting the first socket 1 and the second socket 2 through the intermediate connecting rod 3.
Referring to fig. 2 and 3, the intermediate connecting rod 3 includes a housing 32, an inner conductor 31 and an insulator 33, wherein the housing 32 and the inner conductor 31 are both stamping parts formed by stamping, the inner conductor 31 and the insulator 33 are molded into an integrated structure by insert injection, the insulator 33 wraps the middle portion of the inner conductor 31 and accommodates the two ends of the inner conductor 31, and the integrated structure formed by the inner conductor 31 and the insulator 33 is installed in the housing 32 to form the intermediate connecting rod 3, so that the manufacturing process of the intermediate connecting rod 3 is greatly simplified, and the manufacturing cost of the low-cost adaptive plate radio frequency coaxial connector is further reduced.
Specifically, two convex ribs 34 are arranged on the peripheral wall of the insulator 33 at intervals, a clamping part 35 matched with the convex ribs 34 is arranged on the shell 32, the clamping part 35 is a hollow boss, the convex ribs 34 and the clamping part 35 abut against each other to fix the insulator 33 and the shell 32 relatively, and the insulator 33 is prevented from moving unexpectedly in the shell 32 along the circumferential direction of the shell 32. The utility model provides an in this embodiment 3 equipment convenience of intermediate junction pole, and suit with automatic rigging equipment, the accessible automatic rigging equipment is assembled in order to reduce the human cost to improve the packaging efficiency greatly.
Preferably, still the cover is equipped with fixed cover 36 on the periphery wall of casing 32, fixed cover 36 is the annular just fixed cover 36 covers the portion 35 of blocking is kept away from the one side of insulator 33, through fixed cover 36 further strengthens casing 32 with the reliability of being connected of insulator 33, simultaneously through fixed cover 36 increases low-cost self-adaptation board is to the shielding effect of board radio frequency coaxial connector, in order to promote low-cost self-adaptation board is to the performance of board radio frequency coaxial connector.
The outer peripheral wall of the inner conductor 31 is further provided with a positioning portion 37, the positioning portion 37 is used for increasing friction between the inner conductor 31 and the insulator 33, when the inner conductor 31 and the insulator 33 are integrally molded by injection, the insulator 33 wraps the positioning portion 37, connection looseness between the inner conductor 31 and the insulator 33 caused by collision between the inner conductor 31 and the first socket 1 or the second socket 2 in the process that the middle connecting rod 3 is matched with the first socket 1 or the second socket 2 is avoided, and the overall structure of the middle connecting rod 3 is more stable. In the present embodiment, the positioning portion 37 is a spiral groove.
As shown in fig. 4, the first socket 1 includes a first outer conductor 11, a first center pin 12 disposed in the first outer conductor 11, and a first socket insulator 13 disposed between the first outer conductor 11 and the first center pin 12, the first outer conductor 11 is coupled to the housing 32, the first center pin 12 has a hole for coupling with the inner conductor 31, the housing 32 is inserted into the first outer conductor 11 when the first socket 1 is coupled to the middle connecting rod 3 to connect the first socket 1 to the middle connecting rod 3, and one end of the inner conductor 31 extends into the first center pin 12 to connect the first socket 1 to the middle connecting rod 3.
Be equipped with a plurality of first barbs 14 on the periphery wall of first center needle 12, first barb 14 encircles first center needle 12 is arranged into the annular just first barb 14 respectively with first socket insulator 13 block, so that first center needle 12 with first socket insulator 13 is stable to be cooperated. Preferably, the first outer conductor 11 is also provided with barbs on its inner peripheral wall for engaging with the first socket insulator 13.
Referring to fig. 5, the second socket 2 includes a second outer conductor 21, a second center pin 22 disposed in the second outer conductor 21, and a second socket insulator 23 disposed between the second outer conductor 21 and the second center pin 22, the second outer conductor 21 is coupled to the housing 32, the second center pin 22 has a hole for coupling with the inner conductor 31, the housing 32 is inserted into the second outer conductor 21 when the second socket 2 is coupled to the middle connection rod 3 to connect the second socket 2 to the middle connection rod 3, and one end of the inner conductor 31 extends into the second center pin 22 to connect the second socket 2 to the middle connection rod 3.
Be equipped with a plurality of second barbs 24 on the periphery wall of second center needle 22, second barbs 24 encircles second center needle 22 is arranged into the annular and second barbs 24 respectively with second socket insulator 23 block, so that second center needle 22 with second socket insulator 23 is stable to be cooperated. Preferably, an inner peripheral wall of the second outer conductor 21 is also provided with a barb for engaging with the second socket insulator 23.
In detail, the second outer conductor 21 is close to the opening of the one end of the middle connecting rod 3 is in a horn shape, the center connecting rod with when the second socket 2 is matched, the horn-shaped opening of the second outer conductor 21 guides the middle connecting rod 3 to slide into the second socket 2, and the middle connecting rod 3 is convenient to be connected with the second socket 2 in an inserting mode. When the low-cost adaptive board-to-board radio frequency coaxial connector provided by this embodiment is used, the intermediate connecting rod 3 is first matched with the first socket 1, and then the intermediate connecting rod 3 is inserted into the second socket 2 to realize the conduction between the first socket 1 and the second socket 2.
Referring to fig. 1, in this embodiment, two opposite ends of the inner conductor 31 are respectively provided with a first open slot 38, the first open slot 38 is disposed along the length direction of the inner conductor 31 so that the end of the inner conductor 31 can generate a certain degree of elastic deformation, and the two opposite ends of the inner conductor 31 are both convex arc-shaped surfaces, when the inner conductor 31 is matched with the first central pin 12 and/or the second central pin 22, the inner conductor 31 is contacted with the first central pin 12 and/or the second central pin 22 through the arc-shaped surfaces, and at this time, the end of the inner conductor 31 is deformed and is abutted against the first central pin 12 and/or the second central pin 22 to ensure stable connection. When the first socket 1 and the second socket 2 are misaligned, the inner conductor 31 is offset relative to the axial direction of the first socket 1 and/or the second socket 2, and at this time, the arc-shaped surface of the inner conductor 31 still abuts against the first central pin 12 and/or the second central pin 22, and the connection between the first socket 1 and the second socket 2 is not affected, so that the low-cost adaptive board has good adaptability to board radio frequency coaxial connectors.
Further, two opposite ends of the housing 32 are respectively provided with a second open slot 39, the second open slots 39 are arranged along the length direction of the housing 32, so that the end of the housing 32 can generate elastic deformation to a certain extent, and the two opposite ends of the housing 32 also have protruding arc-shaped surfaces, when the housing 32 is matched with the first outer conductor 11 and/or the second outer conductor 21, the housing 32 is contacted with the first outer conductor 11 and/or the second outer conductor 21 through the arc-shaped surfaces, and at this time, the end of the housing 32 is deformed and is abutted against the first outer conductor 11 and/or the second outer conductor 21 to ensure stable connection. When the first socket 1 and the second socket 2 are dislocated, the housing 32 is offset relative to the axial direction of the first socket 1 and/or the second socket 2, and at this time, the arc-shaped surface of the housing 32 still abuts against the first outer conductor 11 and/or the second outer conductor 21, so that the connection between the first socket 1 and the second socket 2 is not affected, and the discontinuity of signal transmission caused by the dislocation of the first socket 1 and the second socket 2 is avoided. The axial movable range of the intermediate connecting rod 3 provided by the embodiment is 0-2mm, and the radial movable range is 0-0.8 mm.
In this embodiment, the impedance of the first socket 1 is adjusted in such a way that the first socket insulator 13 has an extension 15 with a length of 2.4-2.6mm, and the extension 15 wraps around the first center pin 12. According to the impedance adjustment, the connecting section between the two convex ribs 34 on the insulator 33 has a diameter of 4.1-4.3mm and a length of 2.3-2.5 mm. The diameters of the arc-shaped surfaces at the two opposite ends of the inner conductor 31 are 1.3-1.35mm to ensure that the inner conductor 31 can be reliably connected with the first central needle 12 and/or the second central needle 22 at different positions, and the diameters of hole sites on the first central needle 12 and the second central needle 22, which are matched with the inner conductor 31, are 1.23-1.27 mm. The diameters of the first outer conductor 11 and the second outer conductor 21 are 4.65-4.75mm, and the diameter of the shell 32 of the middle connecting rod 3 is 4.9-5.0mm, so that the shell 32 is in interference fit with the first outer conductor 11 and/or the second outer conductor 21, and good electrical contact is ensured. Still be equipped with bulge 16 on the internal perisporium of first outer conductor 11, bulge 16 is to being close to the direction protrusion of casing 32, first outer conductor 11 has the diameter of bulge 16's position is 4.5-4.6mm, makes first outer conductor 11 with casing 32 stably cooperates, avoids casing 32 with when second outer conductor 21 pegs graft first outer conductor 11 with casing 32 pine takes off. And the low-cost self-adaptive plate complements a low impedance area and a high impedance area of the board radio frequency coaxial connector through the size design, the overall characteristic impedance meets 50 omega, and the standing-wave ratio index can meet the use requirement in different use states.
To sum up, the utility model provides a low-cost self-adaptation board is simple to plate radio frequency coaxial connector processing, manufacturing convenience, whole easily assembly and suit with automatic rigging equipment, and structural stability is good, strong adaptability, compares in the time of job stabilization in current product cost reduction more than 50%, and the whole impedance characteristic can satisfy the user demand simultaneously.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (10)
1. The utility model provides a low-cost self-adaptation board is to board radio frequency coaxial connector, includes first socket, second socket and communicates the first socket with the intermediate junction pole of second socket, the intermediate junction pole includes inner conductor, casing and sets up the inner conductor with the insulator between the casing, its characterized in that: the casing with the inner conductor is the stamping workpiece, the inner conductor with the insulator is mold insert injection moulding's integral type structure, the interval is equipped with a plurality of protruding muscle on the periphery wall of insulator, be equipped with on the casing with protruding muscle matched with card is held the portion, the cover is equipped with fixed cover on the periphery wall of casing, fixed cover covers card is held the portion.
2. The low-cost adaptive board-to-board radio frequency coaxial connector according to claim 1, wherein: the outer peripheral wall of the inner conductor is provided with a positioning part for increasing friction between the inner conductor and the insulator.
3. The low-cost adaptive board-to-board radio frequency coaxial connector of claim 2, wherein: the positioning part is a thread-shaped groove.
4. The low-cost adaptive board-to-board radio frequency coaxial connector according to claim 1, wherein: the two opposite ends of the inner conductor are arc-shaped surfaces respectively, the first socket is provided with a first center needle matched with the inner conductor, and the second socket is provided with a second center needle matched with the inner conductor.
5. The low-cost adaptive board-to-board radio frequency coaxial connector according to claim 4, wherein: the first socket also comprises a first socket insulator wrapping a part of the first center pin, and a first barb matched with the first socket insulator is arranged on the peripheral wall of the first center pin.
6. The low-cost adaptive board-to-board radio frequency coaxial connector according to claim 4, wherein: the second socket also comprises a second socket insulator wrapping a part of the second center pin, and a second barb matched with the second socket insulator is arranged on the peripheral wall of the second center pin.
7. The low-cost adaptive board-to-board radio frequency coaxial connector according to claim 1, wherein: the opposite ends of the inner conductor are respectively provided with a plurality of first slots arranged along the length direction of the inner conductor.
8. The low-cost adaptive board-to-board radio frequency coaxial connector according to claim 1, wherein: the two opposite ends of the shell are respectively provided with a plurality of second slots arranged along the length direction of the shell, the first socket is provided with a first outer conductor matched with the shell, and the second socket is provided with a second outer conductor matched with the shell.
9. The low-cost adaptive board-to-board radio frequency coaxial connector of claim 8, wherein: one end of the second outer conductor, which is close to the shell, is in a horn shape.
10. The low-cost adaptive board-to-board radio frequency coaxial connector of claim 9, wherein: the first outer conductor and the second outer conductor are respectively metal tension pieces.
Priority Applications (1)
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CN202120493600.1U CN214280380U (en) | 2021-03-08 | 2021-03-08 | Low-cost self-adaptation board is to board radio frequency coaxial connector |
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CN202120493600.1U CN214280380U (en) | 2021-03-08 | 2021-03-08 | Low-cost self-adaptation board is to board radio frequency coaxial connector |
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CN214280380U true CN214280380U (en) | 2021-09-24 |
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CN202120493600.1U Active CN214280380U (en) | 2021-03-08 | 2021-03-08 | Low-cost self-adaptation board is to board radio frequency coaxial connector |
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2021
- 2021-03-08 CN CN202120493600.1U patent/CN214280380U/en active Active
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