Coaxial plate end connector

Abstract

The invention discloses a coaxial plate end connector which comprises a base and a contact unit, the contact unit is composed of a signal terminal, a signal pin unit and a grounding piece, the signal terminal comprises a first signal contact part, a second signal contact part and an insert matching part, the first signal contact part is a cage spring type contact part, and the second signal contact part is an insert matching part. The signal second contact part is an elastic sheet type cantilever beam contact piece; a first grounding contact part and a second grounding contact part are arranged at the two ends of the grounding piece respectively; the first grounding contact part is a four-section cantilever beam type contact piece, and the second grounding contact part is an irregular elastic sheet type contact piece.

Description

Technical Field

[0001] The invention belongs to the technical field of connectors, and in particular relates to a coaxial board-end connector. Background Art

[0002] Coaxial board connectors for transmitting radio frequency signals are a key component for establishing radio frequency (RF) signal connections between printed circuit boards (PCBs) and cables. They are widely used in communication equipment, radar systems, wireless network infrastructure, and test and measurement equipment. Coaxial board connectors are designed to ensure high-quality signal transmission and reduce signal loss and interference. Coaxial board connectors for transmitting radio frequency signals are usually welded to the wiring board pins. The dense multi-channel pins on the wiring board make actual assembly and testing inconvenient.

[0003] If the commonly used RF signal coaxial board-end connector and wiring board are matched to abandon the traditional welding type, the assembly will be simple and convenient, and the connector will have strong reliability. Usually, fisheye crimping and external screw locking types are adopted. However, it is easy to have problems with the loose assembly of the connector contact unit and the wiring board, and it is easy to cause detachment and poor contact when used in a more complex environment. Summary of the invention

[0004] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0005] A coaxial board-end connector, comprising: a base and a contact unit, wherein the contact unit is composed of a signal terminal, a signal pin unit and a grounding sheet, wherein the signal terminal comprises a first signal contact portion, a second signal contact portion and an insert matching portion, wherein the first signal contact portion is a cage spring type contact piece, and the second signal contact portion is a spring-type cantilever beam contact piece;

[0006] A first grounding contact portion and a second grounding contact portion are respectively provided at two ends of the grounding plate; the first grounding contact portion is a four-petal cantilever beam type contact piece, and the second grounding contact portion is an irregular spring sheet type contact piece.

[0007] As a preferred embodiment of the above technical solution, the signal first contact portion of the signal terminal and the grounding first contact portion of the grounding sheet constitute a head contact portion of the contact unit; the signal second contact portion of the signal terminal and the grounding second contact portion of the grounding sheet constitute a tail contact portion of the contact unit, and the tail contact portion presents a five-claw arrangement structure.

[0008] As a preferred embodiment of the above technical solution, the cage spring type contact piece is formed by rolling and winding segmented spring pieces, and the segmented spring pieces are in an arc shape.

[0009] As a preferred embodiment of the above technical solution, the signal needle unit is sleeved on the surface of the signal terminal and movably plugged into the grounding sheet, and a plurality of long strip convex ridges are provided on the surface of the signal needle unit.

[0010] As a preferred embodiment of the above technical solution, a U-shaped notch is provided in the middle of the grounding sheet, and an irregular cut is opened on the surface of the signal needle unit. The U-shaped notch of the grounding sheet is bent and inserted into the cut of the signal needle unit to fix the signal needle unit and the grounding sheet.

[0011] As a preferred embodiment of the above technical solution, a plurality of surface mounting cavities are arranged in the middle of the base, and inner conductor spacers are arranged inside the mounting cavities. The inner conductor spacers are used to support and isolate the cage spring type contacts.

[0012] As a preferred embodiment of the above technical solution, a plurality of mounting holes are opened on the surface of the base, guide holes and positioning columns are provided on both sides of the base, and the two guide holes or positioning columns are rotationally symmetrically arranged relative to the center of the base.

[0013] As a preferred embodiment of the above technical solution, it also includes a rivet tube and a washer, one end of the rivet tube is movably inserted in the mounting hole, and the washer is sleeved on the end of the rivet tube, and the rivet tube is used to rivet the base to the PCB board.

[0014] The beneficial effects of the present invention are:

[0015] 1. The signal second contact portion of the signal terminal and the ground second contact portion of the ground sheet form a five-claw arrangement tail contact portion, which can provide a more evenly distributed force, help ensure that the connector can be more accurately aligned when inserted, help maintain a constant impedance characteristic, ensure the quality of the RF signal, and through multiple claws distributed at different positions, it can physically provide a stronger support effect, improve the mechanical strength and stability of the connector, so that it is suitable for applications in vibration or impact environments;

[0016] 2. The contact composed of arc-shaped segmented springs can provide a stable electrical connection, which is not easily affected by vibration or temperature changes, and improves the reliability of long-term use. In addition, this structure allows a single terminal to accept wires of different diameters within a certain range, and can install and remove wires faster without the need for screws or welding for connection;

[0017] 3. The U-shaped notch and cutout on the surface of the signal pin unit can be quickly positioned and fixed with the grounding plate, which facilitates the rapid assembly of the contact unit and makes the signal pin unit and the grounding plate more stable, avoiding movement that affects the connection performance of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 What is shown is a schematic diagram of the overall structure of the embodiment;

[0019] Figure 2 Shown is a front view of a contact unit in an embodiment;

[0020] Figure 3 Shown is an exploded schematic diagram of a contact unit in an embodiment;

[0021] Figure 4 Shown is a front view of the signal pin unit in the embodiment;

[0022] Figure 5 Shown is a rear view of the first contact portion of the signal in the embodiment;

[0023] Figure 6 What is shown is the front view of the base in the embodiment;

[0024] Figure 7 Shown is a rear view of the base in one embodiment.

[0025] In the figure: 10, base; 11, guide hole; 12, mounting hole; 13, mounting cavity; 14, positioning column; 20, contact unit; 21, signal terminal; 211, signal first contact portion; 212, signal second contact portion; 213, insert matching portion; 22, signal needle unit; 221, cutout; 222, ridge; 23, grounding plate; 231, grounding first contact portion; 232, grounding second contact portion; 233, notch; 30, rivet tube; 40, washer; 51, segmented spring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings of the specification.

[0027] Example

[0028] Figure 1-Figure 7 In the embodiment, the coaxial board-end connector comprises: a base 10 and a contact unit 20, wherein the contact unit 20 is composed of a signal terminal 21, a signal needle unit 22 and a grounding plate 23, wherein the signal terminal 21 comprises a first signal contact portion 211, a second signal contact portion 212 and an insert matching portion 213, wherein the first signal contact portion 211 is a cage spring type contact, and the second signal contact portion 212 is a spring type cantilever beam contact;

[0029] The two ends of the grounding plate 23 are respectively provided with a first grounding contact portion 231 and a second grounding contact portion 232 ; the first grounding contact portion 231 is a four-petal cantilever beam type contact piece, and the second grounding contact portion 232 is an irregular spring sheet type contact piece.

[0030] The signal first contact portion 211 of the signal terminal 21 and the grounding first contact portion 231 of the grounding plate 23 constitute the head contact portion of the contact unit 20; the signal second contact portion 212 of the signal terminal 21 and the grounding second contact portion 232 of the grounding plate 23 constitute the tail contact portion of the contact unit 20, and the tail contact portion presents a five-claw arrangement structure.

[0031] The signal second contact portion 212 of the signal terminal 21 and the grounding second contact portion 232 of the grounding plate 23 form a five-claw arrangement tail contact portion, which can provide a more evenly distributed force, help ensure that the connector can be more accurately aligned when inserted, help maintain a constant impedance characteristic, ensure the quality of the RF signal, and through multiple claws distributed in different positions, it can provide stronger physical support, improve the mechanical strength and stability of the connector, so that it is suitable for applications in vibration or impact environments.

[0032] Figure 2-Figure 5 In the embodiment, the cage spring type contact is formed by winding segmented spring pieces 51, and the segmented spring pieces 51 are in an arc shape. The odd number of segmented spring pieces 51 or the even number of segmented spring pieces 51 are combined into a cage spring type contact.

[0033] The contact piece composed of arc-shaped segmented spring pieces 51 can provide a stable electrical connection, is not easily affected by vibration or temperature changes, and improves reliability in long-term use. In addition, this structure can allow a single terminal to accept wires of different diameters within a certain range, and can install and remove wires more quickly without the need for screws or welding for connection.

[0034] Figure 2-Figure 4 In the embodiment, the signal needle unit 22 is sleeved on the surface of the signal terminal 21 and movably plugged into the grounding sheet 23 . The surface of the signal needle unit 22 is provided with a plurality of long strip convex ridges 222 .

[0035] The grounding sheet 23 is provided with a U-shaped notch 233 in the middle, and the signal needle unit 22 is provided with an irregular notch 221 on its surface. The U-shaped notch 233 of the grounding sheet 23 is bent and inserted into the notch 221 of the signal needle unit 22 to fix the signal needle unit 22 and the grounding sheet 23 .

[0036] The U-shaped notch 233 and the cutout 221 arranged on the surface of the signal needle unit 22 can be quickly positioned and fixed with the grounding plate 23, facilitating the rapid assembly of the contact unit 20 and making the signal needle unit 22 and the grounding plate 23 more stable, avoiding movement that affects the connection performance of the connector.

[0037] Figure 6-Figure 7In the embodiment, a plurality of surface mounting cavities 13 are arranged in the middle of the base 10, and inner conductor spacers are arranged inside the mounting cavities 13, and the inner conductor spacers are used to support and isolate the cage spring type contacts.

[0038] The surface of the base 10 is provided with a plurality of mounting holes 12 , and both sides of the base 10 are provided with guide holes 11 and positioning columns 14 , and the two guide holes 11 or positioning columns 14 are rotationally symmetrically arranged relative to the center of the base 10 .

[0039] The guide hole 11 and the positioning column 14 of the base 10 can limit the installation of the connector, avoid misalignment caused by manual operation, and improve the accuracy, stability and efficiency during the plug-in process.

[0040] Figure 1 The rivet tube 30 and the washer 40 are also included. One end of the rivet tube 30 is movably inserted into the mounting hole 12, and the washer 40 is sleeved on the end of the rivet tube 30. The rivet tube 30 is used to rivet the base 10 to the PCB board.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. Coaxial board-end connector, including: A base (10) and a contact unit (20), characterized in that the contact unit (20) is composed of a signal terminal (21), a signal needle unit (22) and a grounding plate (23); the signal terminal (21) includes a first signal contact portion (211), a second signal contact portion (212) and an insert matching portion (213); the first signal contact portion (211) is a cage spring type contact piece, and the second signal contact portion (212) is a spring-type cantilever beam contact piece; A first grounding contact portion (231) and a second grounding contact portion (232) are respectively provided at two ends of the grounding plate (23); the first grounding contact portion (231) is a four-petal cantilever beam type contact piece, and the second grounding contact portion (232) is an irregular spring sheet type contact piece.

2. The coaxial board-end connector according to claim 1, characterized in that: The signal first contact portion (211) of the signal terminal (21) and the grounding first contact portion (231) of the grounding sheet (23) form a head contact portion of the contact unit (20); the signal second contact portion (212) of the signal terminal (21) and the grounding second contact portion (232) of the grounding sheet (23) form a tail contact portion of the contact unit (20), and the tail contact portion presents a five-claw arrangement structure.

3. The coaxial board-end connector according to claim 2, characterized in that: The cage spring type contact piece is formed by rolling and winding a segmented spring piece (51), and the segmented spring piece (51) is in an arc shape.

4. The coaxial board-end connector according to claim 2, characterized in that: The signal needle unit (22) is sleeved on the surface of the signal terminal (21) and movably plugged into the grounding sheet (23); the surface of the signal needle unit (22) is provided with a plurality of long strip convex ridges (222).

5. The coaxial board-end connector according to claim 4, characterized in that: A U-shaped notch (233) is provided in the middle of the grounding sheet (23), and an irregular notch (221) is provided on the surface of the signal needle unit (22); the U-shaped notch (233) of the grounding sheet (23) is bent and inserted into the notch (221) of the signal needle unit (22) to fix the signal needle unit (22) and the grounding sheet (23).

6. The coaxial board-end connector according to claim 3, characterized in that: A plurality of surface mounting cavities (13) are arranged in the middle of the base (10), and inner conductor spacers are arranged inside the mounting cavities (13), wherein the inner conductor spacers are used to support and isolate cage spring type contacts.

7. The coaxial board-end connector according to claim 1, characterized in that: A plurality of mounting holes (12) are provided on the surface of the base (10), and guide holes (11) and positioning columns (14) are provided on both sides of the base (10), wherein the two guide holes (11) or positioning columns (14) are rotationally symmetrically arranged relative to the center of the base (10).

8. The coaxial board-end connector according to claim 7, characterized in that: It also comprises a rivet tube (30) and a washer (40); one end of the rivet tube (30) is movably inserted into the mounting hole (12), and the washer (40) is sleeved on the end of the rivet tube (30); the rivet tube (30) is used to fix the base (10) on the PCB board by riveting.

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