Pin crimping test tool

Abstract

The utility model relates to the technical field of microwave module testing, in particular to a crimping test pin tool, which comprises a sleeve, one end of the sleeve is provided with an interface for transmission line electric connection / radio frequency link, the sleeve is internally provided with a cavity extending along the axial direction of the sleeve, and the cavity is internally provided with an elastic piece; one end of the rod body extends into the cavity and abuts against the elastic piece, and the other end of the rod body is provided with a pin; the limiting structure is composed of a boss on the rod body and an annular step in the cavity of the sleeve, the diameter of the boss is smaller than the inner diameter of the cavity, and the boss and the annular step are in axial limiting fit; compared with the prior art, the test efficiency can be effectively improved; through the design of the elastic piece, the reliability of the pin and the contact point in the contact process can be effectively improved, the contact resistance is reduced, the stability of signal transmission is improved, and the damage rate of the pin tool and the PCB can be reduced through the buffering of the elastic piece.

Description

A crimp test pin fixture Technical Field

[0001] This utility model relates to the field of microwave module testing technology, and in particular to a crimping test pin fixture. Background Technology

[0002] With the rapid development and progress of modern electronic technology, large-scale integrated circuit functional PCBs, microwave modules and chips are widely used in smart electronic products, prompting society to quickly enter the digital age. At the same time, the testing tasks of microwave modules and functional PCBs have become increasingly important.

[0003] Currently, functional PCB testing mainly uses manual soldering and screw fixing methods. However, this method has problems such as low efficiency and high damage rate of test fixtures. Given the difficulty of testing functional PCBs, there is an urgent need for a test pin that can be used for crimping to automate crimping testing. Summary of the Invention

[0004] To address the technical problems existing in the background art, this utility model proposes a crimping test pin fixture.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A crimp test pin fixture, characterized in that it comprises:

[0007] A sleeve, one end of which is provided with an interface for electrical connection / RF link of transmission line, and the inside of the sleeve is provided with a cavity extending along its axial direction, and an elastic element is provided inside the cavity;

[0008] The rod has one end extending into the cavity and abutting against the elastic element, and the other end of the rod is provided with a pin; and a limiting structure, which consists of a boss on the rod and an annular step inside the sleeve cavity. The diameter of the boss is smaller than the inner diameter of the cavity and forms an axial limiting fit with the annular step.

[0009] Preferably, the crimping end of the pin adopts a pointed cone design with an inclination of 45° that matches the test point, and several pointed cones are evenly distributed along the circumference of the rod, with an axial height of 2mm for each pointed cone.

[0010] Preferably, both the sleeve and the rod are made of gold-plated copper to improve the efficiency of signal transmission at the contact surface.

[0011] Preferably, the sleeve has an SMA type coaxial connector, and the interface end face is provided with a gold-plated sealing ring to achieve low-loss transmission of high-frequency signals and airtight connection.

[0012] Preferably, the sleeve adopts a thin-walled tubular structure, with an outer diameter of 1.36 mm, an inner diameter of 1.12 mm, a wall thickness of 0.12 mm, and a total length of 20 mm.

[0013] Preferably, the elastic element is a gold-plated copper spring with an outer diameter of 1.1 mm, a free length of 18 mm, and a copper wire diameter of 0.1 mm, used to provide a buffer gap for the rod and limit the pressing force to 3 N.

[0014] Preferably, the outer wall of the rod is provided with at least two symmetrically distributed axial guide protrusions, and the inner wall of the sleeve cavity is provided with corresponding guide grooves to avoid circumferential deflection when the rod moves along the sleeve axis.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] Compared with existing technologies, it can effectively improve testing efficiency; through the design of the elastic component, it can effectively improve the reliability of the pin and contact point during the contact process, reduce contact resistance, and improve the stability of the transmitted signal. The buffer of the elastic component can also reduce the damage rate of the pin fixture and PCB board; and through the pointed cone structure design, it can prevent the pin and contact point from deflecting during the contact process, and extend the service life of the fixture. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the crimping test pin fixture proposed in this utility model;

[0018] Figure 2 is a cross-sectional view of the crimp test pin fixture proposed in this utility model;

[0019] Figure 3 is a schematic diagram of the pin structure in the crimping test pin fixture proposed in this utility model.

[0020] In the figure: 1-sleeve, 11-annular step, 2-rod, 21-pin, 211-cone, 22-boss, 3-elastic element. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] As shown in Figures 1-3, this embodiment provides a crimp test pin fixture, including:

[0023] Sleeve 1, one end of sleeve 1 is provided with an interface for electrical connection / RF link of transmission line, sleeve 1 has a cavity extending along its axial direction inside, and an elastic element 3 is provided inside the cavity;

[0024] The rod 2 has one end extending into the cavity and abutting against the elastic element 3, and the other end of the rod 2 is provided with a pin 21; and a limiting structure, which consists of a boss 22 on the rod 2 and an annular step 11 in the cavity of the sleeve 1. The diameter of the boss 22 is smaller than the inner diameter of the cavity and forms an axial limiting fit with the annular step 11.

[0025] Overall, the elastic element 3 is installed into the sleeve 1, and the boss 22 end of the rod 2 is inserted into the cavity to form abutment with the elastic element 3 and form a limiting fit. After installation, the test equipment is connected through the interface, and the PCB board to be tested is placed on the test table. The automated clamping mechanism clamps and presses down the fixture so that the pin 21 contacts the test point that matches it, and the signal transmission is completed. As the fixture is pressed down, the buffering effect of the elastic element 3 can prevent the pin 21 from being damaged by excessive pressure on the PCB board, and can also ensure that the test points on different planes of the PCB board can be fixed and pressed firmly. After the test is completed, the automated clamping mechanism clamps and lifts the fixture, the elastic element 3 is reset, and the pin 21 is automatically detached from the PCB board.

[0026] As shown in Figures 1-3, in this embodiment, the crimping end of pin 21 adopts a pointed cone design with an inclination of 45° that matches the test point. Several pointed cones 211 are evenly distributed around the rod 2, and the axial height of the pointed cone is 2mm.

[0027] Specifically, the crimping end of pin 21 adopts a pointed cone design with a 45° angle. By increasing the contact area between the crimping end and the test point, the contact resistance can be effectively reduced, the stability of signal transmission can be improved, and the test accuracy of pin 21 can be improved. When pin 21 is manually operated to contact the test point, the design of the pointed cone 211 can correct the offset angle caused by manual operation when one of the pointed cones 211 contacts the test point, thereby ensuring the accuracy of manual operation.

[0028] As shown in Figures 1 and 2, in this embodiment, both the sleeve 1 and the rod 2 are made of gold-plated copper to improve the efficiency of signal transmission at the contact surface.

[0029] Specifically, both the sleeve 1 and the rod 2 are made of copper plated with gold. By selecting a material with strong conductivity, the contact resistance can be further reduced, the stability of the transmitted signal can be improved, and the energy loss during the test can also be effectively reduced.

[0030] As shown in Figures 1 and 2, in this embodiment, the interface of sleeve 1 is an SMA type coaxial connector, and the interface end face is provided with a gold-plated sealing ring to achieve low-loss transmission of high-frequency signals and airtight connection.

[0031] By using SMA connectors, higher frequency signal transmission can be supported, while the gold-plated sealing ring solves both electrical contact and physical sealing problems, effectively improving the stability of pin 21 tooling testing.

[0032] As shown in Figures 1 and 2, in this embodiment, the sleeve 1 adopts a thin-walled tubular structure. The outer diameter of the sleeve 1 is 1.36 mm, the inner diameter is 1.12 mm, the wall thickness is 0.12 mm, and the total length of the sleeve 1 is 20 mm.

[0033] By using the thin-walled design of sleeve 1, the interaction between the signal and the medium is reduced during transmission, thereby reducing signal energy loss, ensuring signal strength and integrity, enabling the signal to be transmitted with higher quality, and thus improving the testing accuracy of pin 21 fixture.

[0034] As shown in Figure 2, in this embodiment, the elastic element 3 is a gold-plated copper spring with an outer diameter of 1.1 mm, a free length of 18 mm, and a copper wire diameter of 0.1 mm. It is used to provide a buffer gap for the rod 2 and limit the pressing force to 3 N.

[0035] By precisely limiting the crimping force to 3N, the reliability of pin 21 during contact with the PCB board can be guaranteed, while avoiding damage to the test point due to overpressure.

[0036] As shown in Figure 2, in this embodiment, the outer wall of the rod 2 is provided with at least two symmetrically distributed axial guide protrusions, and the inner wall of the sleeve 1 cavity is provided with corresponding guide grooves to avoid circumferential deflection of the rod 2 when it moves along the axial direction of the sleeve 1.

[0037] Specifically, the axial guide protrusion of the rod 2 and the groove of the sleeve 1 can prevent the contact point from shifting due to deflection, and can also prevent the elastic element 3 from failing due to overload, thus effectively extending the service life of the tooling.

[0038] Of course, those skilled in the art will recognize that this invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0040] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A crimping test pin fixture, characterized in that, include: A sleeve (1) has an interface for electrical connection / RF link of transmission line at one end and a cavity extending along its axial direction inside the sleeve (1), and an elastic element (3) is provided inside the cavity; a rod (2) has one end extending into the cavity and abutting against the elastic element (3), and a pin (21) is provided at the other end of the rod (2); and a limiting structure, which consists of a boss (22) on the rod (2) and an annular step (11) inside the cavity of the sleeve (1), the diameter of the boss (22) is smaller than the inner diameter of the cavity and forms an axial limiting fit with the annular step (11).

2. The crimping test pin fixture according to claim 1, characterized in that, The crimping end of the pin (21) adopts a pointed cone design with an inclination of 45° that matches the test point. Several pointed cones (211) are evenly distributed around the rod (2) and the axial height of the pointed cone is 2mm.

3. The crimping test pin fixture according to claim 1, characterized in that, Both the sleeve (1) and the rod (2) are made of copper-plated gold to improve the efficiency of signal transmission at the contact surface.

4. The crimping test pin fixture according to claim 1, characterized in that, The socket (1) has an SMA type coaxial connector with a gold-plated sealing ring on the end face of the interface to achieve low-loss transmission of high-frequency signals and airtight connection.

5. The crimping test pin fixture according to claim 1, characterized in that, The sleeve (1) adopts a thin-walled tubular structure. The outer diameter of the sleeve (1) is 1.36 mm, the inner diameter is 1.12 mm, the wall thickness is 0.12 mm, and the total length of the sleeve (1) is 20 mm.

6. The crimping test pin fixture according to claim 1, characterized in that, The elastic element (3) is a copper-plated gold spring with an outer diameter of 1.1 mm, a free length of 18 mm, and a copper wire diameter of 0.1 mm. It is used to provide a buffer gap for the rod (2) and limit the pressing force to 3 N.

7. The crimping test pin fixture according to claim 3, characterized in that, The outer wall of the rod (2) is provided with at least two symmetrically distributed axial guide protrusions, and the inner wall of the sleeve (1) is provided with corresponding guide grooves to avoid circumferential deflection of the rod (2) when it moves along the axial direction of the sleeve (1).

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