A radio frequency test head center conductor structure
Patent Information
- Application Number
- CN202522211046.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-10-20
AI Technical Summary
本实用新型一种射频测试头中心导体结构,通过对传统针管，弹簧，针杆的方式进行改造，解决电镀、顺滑度、稳定性及寿命问题，将传统针管的管体改造为等分深槽后，将传统针杆尾端改造为等分深槽与改造后的针管等分深槽对插的方式就行搭接，既可以保证滑动顺畅不卡顿，又能保证可靠的电气性能。内置弹簧改造为两端多圈并紧的外置弹簧，既能保证等分深槽对插运动过程中的稳定性，也能保证良好的电气性能。
Smart Images
Figure CN224759649U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of communications, specifically to a central conductor structure for an RF test head. Background Technology
[0002] Currently, the center conductor of RF test heads typically employs a combination of a needle tube, spring, and needle shaft. With the development of the communications industry, the types of devices under test are becoming increasingly diverse, the test frequencies and bandwidths are rising, and the requirements for consistency and stability are becoming more stringent. To cope with the changing test environments, RF test heads usually need to meet various performance requirements within a limited space. In the field of RF test heads, the center conductor portion mostly uses a combination of a needle tube, spring, and needle shaft.
[0003] Traditional RF test head center conductors suffer from several problems: the quality of the needle tube inner hole cannot be guaranteed regardless of whether it's drawn or machined; the plating consistency of the inner hole is poor, leading to inconsistent product performance and stability. Due to these reasons, during assembly, the spring is internally mounted, and the bevel overlaps with the spring, creating an offset state that easily causes spring jamming, unstable electrical performance, and insufficient lifespan. In traditional high-frequency testing, the needle rod end is mostly beveled, with the spring internally mounted and overlapping, creating an offset state that easily causes jamming and unevenness. Traditional needle tubes also face challenges in deep-hole machining, resulting in high defect rates; and deep-hole plating is uneven, with poor consistency and a high defect rate.
[0004] Therefore, those skilled in the art have provided a central conductor structure for an RF test head to solve the problems mentioned in the background art. Utility Model Content
[0005] The purpose of this invention is to provide a central conductor structure for an RF test head, addressing the following problems with traditional RF test head central conductors mentioned in the background: the quality of the needle tube's inner hole cannot be guaranteed regardless of the use of a drawn tube; the plating consistency of the inner hole is poor, resulting in inconsistent product consistency and stability. Due to these two reasons, during assembly, the spring is internally mounted, and the bevel overlaps with the spring, resulting in an offset state that easily leads to spring jamming, unstable electrical performance, and insufficient service life. In traditional high-frequency testing, the tail end of the needle rod mostly uses a bevel, with the spring internally mounted and the bevel overlapping with the spring, resulting in an offset state that easily leads to jamming and unevenness. Traditional needle tubes suffer from difficult deep-hole machining, high defect rates, and uneven plating of the inner hole, resulting in poor consistency and a high defect rate.
[0006] To achieve the above objectives, this utility model provides the following technical solution: A radio frequency test head center conductor structure includes a needle bar A, a spring, and a needle bar B. The spring is sleeved on the equally divided deep groove portion of the needle bar A, and the equally divided deep groove portion of the needle bar B is sleeved on the other end of the spring, forming a complete center conductor structure.
[0007] In a preferred embodiment of this utility model, the central conductor includes needle bar A, spring, and needle bar B.
[0008] In a preferred embodiment of this utility model, the equally divided deep groove A of the needle bar A and the equally divided deep groove B of the needle bar B are located inside the spring.
[0009] In a preferred embodiment of this utility model, a section of both needle bar A and needle bar B is provided with equally divided grooves, and the equally divided deep grooves A of needle bar A and B of needle bar B are interlocked.
[0010] As a preferred embodiment of this utility model: the spring can be an external spring with multiple turns at both ends, and the two ends of the spring are respectively fitted into the equally divided deep grooves of needle bar A and needle bar B.
[0011] Compared with the prior art, the beneficial effects of this utility model are: This utility model discloses a central conductor structure for an RF test head. By modifying the traditional needle tube, spring, and needle rod, it solves problems related to electroplating, smoothness, stability, and lifespan. The traditional needle tube body is modified into an equally divided deep groove, and the tail end of the traditional needle rod is also modified into an equally divided deep groove, which is then interlocked with the modified needle tube's equally divided deep groove. This ensures smooth, jam-free sliding and reliable electrical performance. The internal spring is replaced with an external spring with multiple coils tightly bound at both ends, ensuring stability during the interlocking motion of the equally divided deep grooves and maintaining good electrical performance. Attached Figure Description
[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of the central conductor structure of an RF test head; Figure 2 This is a three-dimensional structural diagram of the overall unfolded structure of the central conductor of an RF test head; Figure 3 This is a schematic diagram of an exploded view of the overall structure of the central conductor in an RF test head. Figure 4 This is a three-dimensional structural diagram of the connection state of the needle bar A and the needle bar B in the central conductor structure of an RF test head.
[0013] Figure 5This is a three-dimensional structural diagram of a spring in the central conductor structure of an RF test head.
[0014] Figure 6 This is a three-dimensional structural diagram of the needle bar A in the central conductor structure of an RF test head.
[0015] Figure 7 This is a three-dimensional structural diagram of the needle bar B in the central conductor structure of an RF test head.
[0016] In the diagram: 1. Needle bar A; 101. Divided deep groove A; 2. Spring; 3. Needle bar; 301. Divided deep groove B; Detailed Implementation
[0017] Please see Figure 1-7 In this embodiment of the utility model, a central conductor structure for an RF test head includes a needle rod A, one end of which is fitted with a spring 2, and the other end of which is fitted with a needle rod B. By modifying the traditional needle tube, spring, and needle rod, the problems of electroplating, smoothness, stability, and lifespan are solved, the processing difficulty is reduced, the defect rate is reduced, and the electroplating quality is improved. The central conductor is modified by incorporating the spring 2 inside and fitting the needle tail of the needle rod B into the inner hole of the needle rod A to form the central conductor. The spring 2 is placed externally, and the inner hole of the needle rod A is modified into an equally divided deep groove B, and the needle tail of the needle rod B is modified into an equally divided deep groove B. The equally divided deep grooves A and B of the needle rod A and B interlock and overlap with each other. The equally divided deep grooves A and B of the needle rod can smoothly interlock and slide with the compression of the spring, ensuring reliable contact.
[0018] Please see Figure 1-7 The needle bar A and equally divided deep groove A, and needle bar B and equally divided deep groove B. The tail end of needle bar B is modified to interlock with the equally divided deep groove of needle bar A, ensuring smooth, non-jamming sliding and reliable electrical performance. The internal spring is modified to an external spring with multiple coils tightly bound at both ends, ensuring stability during the interlocking motion of the equally divided deep grooves and good electrical performance. The internal parts of equally divided deep groove A of needle bar A and equally divided deep groove B of needle bar B are both designed with equally divided grooves, and the equally divided deep grooves A and B of needle bar A and B interlock. Spring 2 can be an external spring with multiple coils tightly bound at both ends.
[0019] It should be noted that this utility model is a central conductor structure for an RF test head, including 1. a needle bar A; 2. a spring; 3. a needle bar B; 4. a connecting end A; all components are general standard parts or parts known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.
[0020] The working principle of this utility model is as follows: By modifying the traditional needle tube, spring, and needle rod, the problems of electroplating, smoothness, stability, and lifespan are solved. After modifying it into equally divided deep grooves, the processing difficulty is reduced, and the electroplating is uniform and stable. In use, the central conductor is modified by inserting the inner part of the central conductor, the spring 2, and the needle tail part of the needle rod B into the inner hole of the needle rod A to form the central conductor. The spring 2 is placed externally, and the inner hole of the needle rod A is modified into equally divided deep grooves, and the needle tail part of the needle rod B is modified into equally divided deep grooves B. The equally divided deep grooves A of the needle rod A and B of the needle rod B are interlocked. The equally divided deep grooves can be smoothly interlocked and slide with the compression of the spring to ensure reliable contact. The needle rod tail end is modified to interlock with the equally divided deep groove of the needle tube, which can ensure smooth sliding without jamming and reliable electrical performance. The built-in spring has been modified into an external spring with multiple coils at both ends, which can ensure both stability during the insertion process of equally spaced deep slots and good electrical performance.
[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A central conductor structure for an RF test head, comprising a needle bar A (1), a spring (2), and a needle bar B (3), characterized in that, One end of the needle bar A (1) is fitted with a spring (2), and one end of the spring (2) is fitted with a needle bar B (3). The needle bar A (1) has an equally divided deep groove A (101) at the end near the spring (2), and the needle bar B (3) is fixedly connected to an equally divided deep groove B (301) at the end near the spring (2).
2. The radio frequency test head center conductor structure according to claim 1, characterized in that, The equally divided deep groove A (101) of the needle bar A (1) and the equally divided deep groove B (301) of the needle bar B (3) are located inside the spring (2).
3. The radio frequency test head center conductor structure according to claim 1, characterized in that, The needle bar A (1) and needle bar B (3) are both provided with grooves inside, and the needle bar A (1) and needle bar B (3) are interlocked.
4. The radio frequency test head center conductor structure according to claim 1, characterized in that, The spring (2) can be an external spring with multiple turns at both ends, which is sequentially fitted into the equally divided deep grooves A (101) and B (301) of the needle bar A (1) and needle bar B (3).