Floating coaxial inter-board connector

Abstract

A floating coaxial inter-board connector comprises an insulator and a central conductor, an outer conductor capable of being matched with the central conductor to form a transmission channel is arranged on the outer side of the insulator, the central conductor comprises a metal sleeve installed on the inner side of the insulator, and an elastic supporting piece and a floating contact piece are arranged in the metal sleeve. The outer wall of the floating contact piece is in contact with the inner wall of the metal sleeve, and when the PCBs move in the axial direction of the connector, the elastic supporting piece can abut against the floating contact piece and enable the floating contact piece to be in contact with the PCBs, so that the floating function between the PCBs can be achieved, sockets do not need to be welded to the two PCBs respectively, and the cost is reduced. And the adapter does not need to be assembled between the two sockets, so that the structure of the floating coaxial inter-board connector can be simplified, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of inter-board connectors, in particular to a floating coaxial inter-board connector. Background Art

[0002] Existing floating coaxial board-to-board connectors usually solder sockets on two PCB boards respectively, and then set an adapter between the two sockets to achieve floating connection. Due to the parts processing technology and assembly requirements, the structure of the floating coaxial board-to-board connector is complex, the assembly between the adapter and the two sockets is inconvenient, and the cost is high. Utility Model Content

[0003] The utility model aims to provide a floating coaxial inter-board connector, which simplifies the structure and reduces the cost.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a floating coaxial board-to-board connector, including an insulator and a center conductor, the outer side of the insulator is provided with an outer conductor that can cooperate with the center conductor to form a transmission channel, the center conductor includes a metal sleeve installed on the inner side of the insulator, the metal sleeve is provided with an elastic support member and a floating contact member, the outer wall of the floating contact member is in contact with the inner wall of the metal sleeve, when the PCB board moves along the axial direction of the connector, the elastic support member can press the floating contact member and keep the floating contact member in contact with the PCB board.

[0005] Preferably, two ends of the elastic support member press against the floating contact member and the metal sleeve respectively.

[0006] Preferably, one end of the metal sleeve is open, and the other end is provided with a bent portion for providing support for the elastic support member.

[0007] Preferably, two floating contacts are arranged in the metal sleeve, and ends of the two floating contacts that are away from each other extend out from two ends of the metal sleeve respectively, and two ends of the elastic support member can press the two floating contacts respectively.

[0008] Preferably, the elastic support member is an elastic bending sheet formed by stamping and bending.

[0009] Preferably, the elastic support member is a spring.

[0010] Preferably, the outer wall of the metal sleeve is provided with a convex hump, and the convex hump is interference fit with the inner wall of the insulator to limit the axial relative movement of the metal sleeve and the insulator.

[0011] Preferably, the outer wall of the floating contact piece is provided with an outer ring protrusion, and the inner wall of the metal sleeve is provided with an inner concave annular surface, which can clamp the side of the outer ring protrusion away from the elastic support piece to limit the axial relative movement of the metal sleeve and the floating contact piece.

[0012] Preferably, the outer wall of the floating contact is provided with a petal-shaped block, and the end of the metal sleeve is provided with an inner ring platform, which can clamp the petal-shaped block to limit the axial relative movement of the metal sleeve and the floating contact.

[0013] Preferably, the outer conductor is located on the outer side of the insulator in the radial direction, and one or both ends of the outer conductor in the axial direction are provided with conductive glue for contacting with the PCB board.

[0014] According to the above technical solution, the beneficial effects of the utility model are:

[0015] The utility model arranges an elastic support member and a floating contact member in the metal sleeve of the center conductor, so that the elastic support member can push the floating contact member and keep the end of the floating contact member in contact with the PCB board, and the outer wall of the floating contact member is in sliding contact with the inner wall of the metal sleeve, so that the floating function between the boards can be realized. Compared with the existing floating coaxial board-to-board connector, it is no longer necessary to weld sockets on two PCB boards respectively, and it is also unnecessary to assemble an adapter between the two sockets. The structure of the floating coaxial board-to-board connector can be simplified and the cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the use of embodiment 1;

[0017] Figure 2 is a cross-sectional schematic diagram of embodiment 1;

[0018] Figure 3 It is a partial cross-sectional enlarged view of the first embodiment;

[0019] Figure 4 It is a schematic diagram of a metal sleeve of Embodiment 1;

[0020] Figure 5 is a schematic diagram of a floating contact member and an elastic bending member of the first embodiment;

[0021] Figure 6 This is a schematic diagram of the use of the second embodiment;

[0022] Figure 7 This is a cross-sectional schematic diagram of Example 2 after removing the insulator;

[0023] Figure 8 is a schematic diagram of a floating contact member and an elastic bending member of the second embodiment;

[0024] Fig. 9 It is a cross-sectional schematic diagram of embodiment 3.

[0025] Markings in the figure: 1. PCB board, 2. outer conductor, 3. conductive glue, 4. insulator, 5. metal sleeve, 6. floating contact, 7. elastic bending piece, 8. inner concave ring surface, 9. outer ring protrusion, 10. convex hull, 11. inner ring platform, 12. petal-shaped block, 13. spring, 14. bending part. DETAILED DESCRIPTION

[0026] With reference to the accompanying drawings, the specific implementation is as follows:

[0027] A floating coaxial board-to-board connector comprises an insulator 4 and a center conductor. An outer conductor 2 is arranged on the outer side of the insulator 4. After one or both ends of the center conductor contact a PCB board 1, the center conductor cooperates with the outer conductor 2 to form a transmission channel. The center conductor comprises a metal sleeve 5 installed on the inner side of the insulator 4. An elastic support member and a floating contact member 6 are arranged inside the metal sleeve 5. The outer wall of the floating contact member 6 contacts the inner wall of the metal sleeve 5. When the PCB board 1 moves along the axial direction of the connector, the elastic support member can press the floating contact member 6 and keep the floating contact member 6 in contact with the PCB board 1.

[0028] Embodiment 1: Figure 1-5 As shown, the insulator 4 of the first embodiment is provided with an outer conductor 2 along the radial outer side, and the outer conductor 2 is a cylindrical member sleeved and installed on the outer side of the insulator 4. Conductive glue 3 is respectively provided at both ends of the outer conductor 2 along the axial direction. The total height of the outer conductor 2 and the conductive glue 3 on both sides is greater than the height of the insulator 4, so that the conductive glue 3 on both sides can extend from the end surface of the insulator 4. In this embodiment, the conductive glue 3 is a conical ring structure with a trapezoidal cross-section, one side of the large end of the cone is bonded to the surface of the outer conductor 2 as a whole, and one side of the small end of the cone is used for contacting with the PCB board 1 for electrical conduction. The conductive glue 3 can be arranged on the end surface of the outer conductor 2 by injection molding. Not only does the conductive glue 3 itself have a certain elasticity, but it can also be convenient to control the conductive glue 3 to be greater than the height range of the insulator 4, so that the contact force between the conductive glue 3 and the PCB board 1 can be adapted to the contact force between the floating contact 6 and the PCB board 1.

[0029] A through hole is provided on the insulator 4, and a metal sleeve 5 is inserted and installed in the through hole. The metal sleeve 5 is relatively fixed to the insulator 4 through interference fit. One end of the metal sleeve 5 is open, and the other end is provided with a bending portion 14 for providing support for the elastic support member. A floating contact 6 is provided in the metal sleeve 5. The elastic support member is an elastic bending piece 7 formed by stamping and bending. The two ends of the elastic support member press the floating contact 6 and the bending portion 14 of the metal sleeve 5 respectively. When the PCB board 1 moves along the axial direction of the connector, the floating contact 6 and the bending portion 14 of the metal sleeve 5 can both keep in contact with the PCB board 1.

[0030] like Figure 4As shown, the outer wall of the metal sleeve 5 of the first embodiment is provided with a convex bump 10 , and the convex bump 10 is interference fit with the inner wall of the insulator 4 , thereby limiting the axial relative movement of the metal sleeve 5 and the insulator 4 .

[0031] like Figure 3 , 5 As shown, the floating contact 6 of the first embodiment is a hollow cylindrical structure, and one end of the floating contact 6 that contacts the PCB board 1 has a plurality of petal structures, and the plurality of petal structures are all bent toward the axial position of the floating contact 6, and there are mutually separated slots between the petal structures. Therefore, when the PCB board 1 squeezes the floating contact 6, the plurality of petal structures can shrink inwardly, so that the floating contact 6 still maintains full contact with the PCB board 1 after being squeezed by the PCB board 1.

[0032] like Figure 3 , 5 As shown, the outer wall of the floating contact 6 is provided with an outer ring protrusion 9, and the inner wall of the metal sleeve 5 is provided with an inner concave annular surface 8, which can clamp the outer ring protrusion 9 away from the elastic support, thereby limiting the axial relative movement of the metal sleeve 5 and the floating contact 6. The inner concave annular surface 8 of this embodiment is directly bent and formed on the metal sleeve 5, so that the inner wall of the metal sleeve 5 has a section of arc surface with a smaller inner diameter. In addition, other limiting structures that can clamp the outer ring protrusion 9 can also be installed on the inner wall of the metal sleeve 5.

[0033] Embodiment 2: Figure 6-8 As shown, the difference between the second embodiment and the first embodiment is that the outer wall of the floating contact 6 is not provided with an outer ring protrusion 9, but is provided with a plurality of petal-shaped blocks 12, and the end of the metal sleeve 5 close to the floating contact 6 is provided with an inner ring platform 11, and the inner ring platform 11 can clamp the petal-shaped blocks 12, thereby limiting the axial relative movement of the metal sleeve 5 and the floating contact 6. The inner ring platform 11 of this embodiment is realized by forming a conical surface that shrinks inward at the end of the metal sleeve 5, and in addition, other limiting structures that can clamp the petal-shaped blocks 12 can also be installed at the end of the cylindrical metal sleeve 5.

[0034] In the third embodiment, the floating contact member 6 used in the first and second embodiments is replaced by two floating contact members 6, and the two ends of the elastic bending piece 7 are respectively connected to the two floating contact members 6. In addition, the elastic bending piece 7 can be replaced by a spring 13, and the floating contact of the floating contact member 6 is achieved by the elastic force of the spring 13.

[0035] Embodiment 3: Fig. 9As shown, the inner side of the insulator 4 of the third embodiment is provided with a metal sleeve 5 with two open ends, and two floating contacts 6 are arranged in the metal sleeve 5. The elastic support member is a spring 13, and the two ends of the spring 13 respectively extend into the inner sides of the two floating contacts 6 and press the two floating contacts 6 at the same time, and the floating contact between the two floating contacts 6 and the PCB board 1 is achieved through the elastic force of the spring 13.

[0036] In the first, second and third embodiments, the inner wall surface of the insulator 4 and the outer wall surface of the floating contact 6 are cylindrical surfaces matching the inner and outer circular surfaces of the metal sleeve 5, respectively, which can ensure uniform characteristic impedance and improve RF transmission performance.

Claims

1. A floating coaxial board-to-board connector, characterized in that: The invention comprises an insulator (4) and a central conductor, wherein an outer conductor (2) capable of cooperating with the central conductor to form a transmission channel is provided on the outer side of the insulator (4), and the central conductor comprises a metal sleeve (5) mounted on the inner side of the insulator (4), wherein an elastic support member and a floating contact member (6) are provided in the metal sleeve (5), wherein the outer wall of the floating contact member (6) contacts the inner wall of the metal sleeve (5), and when the PCB board (1) moves along the axial direction of the connector, the elastic support member can press the floating contact member (6) and keep the floating contact member (6) in contact with the PCB board (1).

2. A floating coaxial board-to-board connector according to claim 1, characterized in that: The two ends of the elastic support member press against the floating contact member (6) and the metal sleeve (5) respectively.

3. A floating coaxial board-to-board connector according to claim 2, characterized in that: One end of the metal sleeve (5) is open, and the other end is provided with a bent portion (14) for providing support for the elastic support member.

4. The floating coaxial board-to-board connector according to claim 1, characterized in that: Two floating contact pieces (6) are arranged in the metal sleeve (5), and ends of the two floating contact pieces (6) that are away from each other extend out from two ends of the metal sleeve (5), respectively, and the two ends of the elastic support piece can respectively press the two floating contact pieces (6).

5. The floating coaxial board-to-board connector according to claim 1, characterized in that: The elastic support member is an elastic bending sheet (7) formed by stamping and bending.

6. The floating coaxial board-to-board connector according to claim 1, characterized in that: The elastic support member is a spring (13).

7. The floating coaxial board-to-board connector according to claim 1, characterized in that: The outer wall of the metal sleeve (5) is provided with a convex bulge (10), and the convex bulge (10) is interference-fitted with the inner wall of the insulator (4) to limit the axial relative movement of the metal sleeve (5) and the insulator (4).

8. The floating coaxial board-to-board connector according to claim 1, characterized in that: An outer ring protrusion (9) is provided on the outer wall of the floating contact piece (6), and an inner concave ring surface (8) is provided on the inner wall of the metal sleeve (5). The inner concave ring surface (8) can clamp the outer ring protrusion (9) away from the elastic support piece to limit the axial relative movement of the metal sleeve (5) and the floating contact piece (6).

9. The floating coaxial board-to-board connector according to claim 1, characterized in that: The outer wall of the floating contact piece (6) is provided with a petal-shaped clamping block (12), and the end of the metal sleeve (5) is provided with an inner ring platform (11), and the inner ring platform (11) can clamp the petal-shaped clamping block (12) to limit the axial relative movement of the metal sleeve (5) and the floating contact piece (6).

10. The floating coaxial board-to-board connector according to claim 1, characterized in that: The outer conductor (2) is located on the outside of the insulator (4) in the radial direction, and one or both ends of the outer conductor (2) in the axial direction are provided with conductive glue (3) for contacting the PCB board (1).

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