An adjustable clamp for metal can-lead pins and a crimp testing device

Abstract

The application relates to an adjustable clamp for metal tube shell pins and a crimping test device, wherein the adjustable clamp for metal tube shell pins comprises a clamp body, a metal tube shell docking station is formed in the clamp body, a crimping unit is arranged on the clamp body, a plurality of crimping units are arranged in correspondence with the number of pins, the crimping unit is used for abutting the pins to a PCB test plate, and a pressure measurement unit is arranged on the clamp body and used for displaying the pressure borne by the pins when a single crimping unit abuts a single pin. The crimping of a single pin is realized by a single crimping unit, and the pressure borne by the single pin when the single crimping unit abuts the single pin is measured by combining the pressure measurement unit, so that an operator can adjust the pressure of each crimping unit, and the problems of uneven force borne by multiple pins, unstable test signals and data distortion when a pressure block is used to realize the crimping of the pins and the PCB test plate in the prior art are solved.

Description

Technical Field

[0001] This application relates to the field of fixture testing tooling, and in particular to an adjustable fixture for metal tube lead and a crimping testing device. Background Technology

[0002] In the field of electronic device testing, the reliability of pin connections for metal-cased devices, such as optical modules and radio frequency devices, is a key factor in ensuring testing accuracy and efficiency. Currently, the industry commonly uses insulating materials, such as acrylic and engineering plastics, to make the fixture body. Overall pressure is applied by tightening screws distributed on both sides of the pressure block to achieve crimping and fixing of the pins to the PCB test board.

[0003] However, in actual use, due to the poor rigidity of the insulation material, when the screws on both sides are tightened, the middle part of the insulation block bends and deforms due to uneven force, resulting in insufficient crimping force on the pins in the middle position, thus causing a loose connection problem. Loose connections not only cause unstable test signals and distorted data acquisition, but may also lead to device damage or test failure, especially in high-precision testing scenarios. Summary of the Invention

[0004] This application provides an adjustable clamp for metal tube pins and a crimping test device to solve the problem in related technologies where uneven force is applied to multiple pins when using pressure blocks to crimp pins to PCB test boards, resulting in unstable test signals and data distortion.

[0005] In a first aspect, an adjustable clamp for metal-cased leads is provided, comprising: The fixture body has a metal tube shell docking station on it; A crimping unit is located on the fixture body and multiple crimping units are provided corresponding to the number of pins. The crimping unit is used to press the pins against the PCB test board. And a pressure measuring unit, which is disposed on the clamp body and is used to display the pressure exerted on the pin when a single crimping unit abuts against a single pin.

[0006] In conjunction with the first aspect, in one embodiment, the clamp body has a plurality of crimping holes vertically formed on the periphery of the metal tube shell mating station, the number of crimping holes corresponding to the number of pins, and the crimping unit is disposed within the crimping holes, the crimping unit comprising: A connecting pressure ball is located inside the crimping hole; And a crimping member, which is connected to the connecting ball and is used to push the connecting ball toward the pin until the pin is abutted against the PCB test board.

[0007] In conjunction with the first aspect, in one embodiment, the crimping hole is configured as a threaded hole, and the crimping member includes: A crimping screw, which is threaded into the crimping hole; In addition, a buffer spring, the two ends of which are connected to the crimping screw and the connecting pressure ball, respectively.

[0008] In conjunction with the first aspect, in one embodiment, the clamp body is transparent, and the pressure measuring unit includes: Pressure scale lines are set on the fixture body, and multiple pressure levels are spaced apart along the depth direction of the crimping hole.

[0009] In conjunction with the first aspect, in one embodiment, the connecting pressure ball is made of a conductive material, and the clamp body has a side hole on its side wall. The side hole is provided corresponding to the top surface of the connecting pressure ball and communicates with the crimping hole. The side hole is used for the lead terminal to pass through.

[0010] In conjunction with the first aspect, in one embodiment, the pressure metering unit includes: A pressure sensor is used to connect to a pin and display the pressure applied to the pin.

[0011] Secondly, a crimping test apparatus for metal housing pins is provided, comprising: An adjustable clamp for metal-cased leads as described in any of the above.

[0012] In conjunction with the second aspect, in one embodiment, a crimping test apparatus for metal housing pins further includes: Test base; A PCB test board is set on the test base and has a metal tube housing placement station. The fixture body is set on the PCB board. The metal tube housing placement station is set in correspondence with the metal tube housing docking station. The crimping unit is used to press the pins against the PCB test board. And a fastener for securing the PCB test board and the fixture body to the test base.

[0013] In conjunction with the second aspect, in one embodiment, the fastener includes: The fastening bolt passes through the PCB test board and is connected to the test base, or passes through the fixture body and the PCB test board in sequence and is connected to the test base.

[0014] In conjunction with the second aspect, in one embodiment, a crimping test apparatus for metal housing pins further includes: A support component is disposed between the PCB test board and the test base.

[0015] The beneficial effects of the technical solution provided in this application include: by setting multiple crimping units on the fixture body corresponding to the number of pins, a single crimping unit can crimp a single pin. Combined with a pressure measuring unit, the pressure on a single pin when the single crimping unit is in contact with the pin is measured, which makes it easier for the operator to adjust the pressure of each crimping unit, ensuring that the force on multiple pins of the metal tube shell is uniform, making subsequent measurements more stable and reliable.

[0016] This application provides an adjustable clamp for metal tube pins and a crimping test device. Since its crimping unit can crimp a single pin and adjust the pressure of the single crimping unit in real time with the pressure metering unit, it solves the problem in the related technology that when using a pressure block to crimp the pin to the PCB test board, the force on multiple pins is uneven, resulting in unstable test signals and data distortion. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This application provides an overall structural diagram of a crimping test device for metal casing pins, as shown in the embodiments of the present application. Figure 2 This is a cross-sectional view of an adjustable clamp for metal housing pins provided in an embodiment of this application.

[0019] In the diagram: 1. Fixture body; 11. Crimping hole; 12. Side hole; 2. Crimping unit; 21. Connecting pressure ball; 22. Crimping screw; 23. Buffer spring; 3. Test base; 31. PCB test board; 32. Fastening bolt; 33. Support component; 4. Metal tube shell body; 41. Pin; 5. Lead terminal. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] This application provides an adjustable clamp for metal tube pins and a crimping test device, which can solve the problem in related technologies where uneven force is applied to multiple pins when using a pressure block to crimp the pins to the PCB test board, resulting in unstable test signals and data distortion.

[0022] For ease of understanding, this application embodiment is described with an adjustable clamp for the metal casing pin 41 already mounted on the crimping test device, referring to... Figure 1 This application discloses a crimping test device for metal shell pins 41, which includes an adjustable fixture for metal shell pins 41, a test base 3, a PCB test board 31, and a fixing component. The adjustable fixture for metal shell pins 41 includes a fixture body 1, a crimping unit 2, and a pressure measuring unit. The fixture body 1 has a metal shell mating station. The crimping unit 2 is disposed on the fixture body 1, and multiple units are disposed corresponding to the number of pins 41 on the metal shell body 4. The crimping unit 2 is used to abut against the pins 41. The pressure measuring unit is disposed on the fixture body 1 and displays the pressure on the pin 41 when the crimping unit 2 abuts against the corresponding pin 41. During the crimping test of the metal tube body 4, each crimping unit 2 is aligned with each pin 41 of the metal tube body 4, so that one crimping unit 2 abuts against one pin 41. The pressure on each pin 41 is then observed through the pressure measuring unit. The tester makes fine adjustments to the crimping unit 2 according to the pressure displayed by the pressure measuring unit to keep the pressure on each pin 41 equal, thereby ensuring that the pins 41 on the metal tube body 4 are subjected to uniform force, which is convenient for subsequent testing.

[0023] The PCB test board 31 is mounted on the test base 3, and a metal tube housing placement station is provided in its center. The fixture body 1 is mounted on the PCB test board 31, and the metal tube housing placement station and the metal tube housing docking station are correspondingly set. The fasteners are used to fix the PCB test board 31 and the fixture body 1 to the test base 3. Before testing the metal tube housing body 4, the PCB test board 31 is first fixed to the test base 3 using the fasteners. Then, the metal tube housing body 4 is placed in the metal tube housing placement station and fixed to the test base 3 with bolts. Then, the fixture body 1 is placed on the PCB test board 31, and the crimping unit 2 is aligned with each pin 41 of the metal tube housing body 4. The fixture body 1, the PCB test board 31, and the test base 3 are fixed using the fasteners, thus completing the installation of the crimping test device and facilitating the subsequent testing process.

[0024] More specifically, the fastener is a fastening bolt 32, which passes through the PCB test board 31 and is threadedly connected to the test base 3 to fix the PCB test board 31. In this embodiment, a fastening bolt 32 is provided at each of the four corners of the PCB test board 31 to stably fix the PCB test board 31 onto the test base 3. After placing the metal tube housing body 4 in the metal tube housing placement station, so that each pin 41 of the metal tube housing body 4 is located on the surface of the PCB test board 31, the metal tube housing body 4 is fixed to the test base 3 with bolts. Then, the fixture body 1 is placed on the PCB test board 31, wherein the metal tube housing docking station is set corresponding to the metal tube housing body 4, and each crimping unit 2 is aligned with the pin 41. Then, the fastening bolt 32 passes through the fixture body 1 and the PCB test board 31 in sequence and is fixedly connected to the test base 3, thus realizing the installation step before the testing process.

[0025] Furthermore, during the testing of the metal casing body 4, the crimping unit 2 forms an electrical connection by abutting the pins 41 against the surface of the PCB test board 31. To perform various tests on the pins 41, other electronic components are also located on the bottom of the PCB test board 31. When the tester tightens the fastening bolts 32 to fix the PCB test board 31 onto the test base 3, there is a contact relationship between the electronic components on the bottom of the PCB test board 31 and the test base 3. If the tightening force generated by the tester tightening the fastening bolts 32 is too great, it may damage the electronic components on the bottom of the PCB test board 31. Therefore, in order to protect the electronic components on the bottom of the PCB test board 31 when it is installed on the test base 3, a support member 33 is provided between the PCB test board 31 and the test base 3, so that there is a gap of the height of the support member 33 between the PCB test board 31 and the test base 3, thereby preventing the bottom surface of the PCB test board 31 from contacting the test base 3. Specifically, in one embodiment of this application, the support member 33 is a support nut, which is located at the four corners of the test base 3. The fastening bolt 32 passes through the PCB test board 31 and then through the support nut, and is connected to the test base 3. This not only allows the PCB test board 31 to be spaced apart from the test base 3 by the height of a support nut, but also further improves the connection stability between the PCB test board 31 and the test base 3, making it more convenient to use. In other embodiments of this application, a support block can also be used as the support member 33. The support block is placed between the PCB test board 31 and the test base 3 to raise the installation height of the PCB test board 31 and prevent the electronic components at the bottom of the PCB test board 31 from directly contacting the test base 3.

[0026] More specifically, refer to Figure 2In one embodiment of this application, the fixture body 1 has multiple crimping holes 11 vertically formed around the metal tube housing docking station. The number of crimping holes 11 corresponds to the number of pins 41 on the metal tube housing body 4. Each crimping hole 11 contains a crimping unit 2. After the crimping holes 11 are aligned with the pins 41, pressure can be applied to the pins 41 through the crimping unit 2, thereby forming an electrical connection between the pins 41 and the PCB test board 31 below. In the early manufacturing stage, crimping holes 11 can be formed around the periphery of the fixture body 1 according to the distribution of the pins 41 on the metal tube housing body 4, facilitating the subsequent crimping alignment of the crimping units 2 with the pins 41. In this embodiment, the fixture body 1 is square according to the shape of the metal tube housing body 4, and crimping holes 11 are formed on its three sides.

[0027] Furthermore, the crimping unit 2 includes a connecting pressure ball 21 and a crimping member. The connecting pressure ball 21 is located within the crimping hole 11, and the crimping member is also disposed within the crimping hole 11 and connected to the connecting pressure ball 21. The crimping member can apply pressure to the connecting pressure ball 21 to push the connecting pressure ball 21 toward the pin 41 until the connecting pressure ball 21 abuts the pin 41 onto the PCB test board 31. In this embodiment, the crimping hole 11 is opened along the height direction of the fixture body 1. The crimping member is connected to the connecting pressure ball 21 and is located above the connecting pressure ball 21 to provide downward pressure to the connecting pressure ball 21, so that the connecting pressure ball 21 moves downward until the pin 41 abuts onto the PCB test board 31, and a stable electrical connection is formed between the pin 41 and the PCB test board 31.

[0028] More specifically, in one embodiment of this application, the crimping hole 11 is specifically configured as a threaded hole, and the crimping component includes a crimping screw 22 and a buffer spring 23. The crimping screw 22 is threadedly connected to the crimping hole 11, and the two ends of the buffer spring 23 in the length direction are respectively connected to the crimping screw 22 and the connecting pressure ball 21. The tester tightens the crimping screw 22 with a screwdriver, thereby causing the crimping screw 22 to squeeze the buffer spring 23 in the vertical direction. The buffer spring 23 is subjected to the pressure of the continuous downward pressure of the crimping screw 22. It is first compressed by its own elastic potential energy, and then the pressure it receives is buffered. When the pressure it receives exceeds the threshold of its own elastic potential energy, it pushes the connecting pressure ball 21 to move towards the pin 41. Therefore, the pressure received by the connecting pressure ball 21 is the pressure buffered by the buffer spring 23, so as to buffer and protect the connecting pressure ball 21 and the pin 41, and realize the crimping of the pin 41 and the PCB test board 31.

[0029] Furthermore, to facilitate observation of the actual pressure on each pin 41 by testers, in this embodiment, the fixture body 1 is specifically transparent, and the pressure measuring unit includes several pressure scale lines arranged along the depth direction of the crimping hole 11. During the early manufacturing stage, the distribution of each pressure scale line along the depth direction of the crimping hole 11 is calculated based on the elastic potential energy of the buffer spring 23, thereby obtaining different pressure levels. When the surface of the crimping screw 22 is aligned with a single pressure scale line, the pressure on the pin 41 is the pressure level indicated by that pressure scale line. The structure is simple and easy for testers to observe. In addition, this scale line arrangement method can save on early manufacturing costs.

[0030] In other embodiments of this application, a pressure sensor can also be used as the pressure measurement unit. The pressure sensor is connected to each pin 41 and fixed on the test base 3. The number of pressure sensors corresponds to the number of pins 41, and during crimping, the pins 41 extend from the frame of the clamp body 1 to facilitate connection between the pressure sensor and the pin. Although this will increase the overall manufacturing cost to some extent, the pressure sensor can monitor the pressure on each pin 41 in real time, further facilitating the tester to adjust the pressure on each pin 41 in real time by tightening or loosening the crimping screw 22.

[0031] Furthermore, the connecting ball 21 is made of conductive material, and the clamp body 1 also has a side hole 12 on its side wall. The side hole 12 is opened on the top surface of the connecting ball 21 and is used for the lead terminal 5 to pass through. When performing electrical testing on the metal casing, DuPont male wires or other standard lead terminals 5 can also be inserted into the side hole 12. The lead terminal 5 extends into the side hole 12 and pushes open the steel ring of the buffer spring 23 until it connects with the surface of the connecting ball 21. Then, the buffer spring 23 is compressed by the crimping screw 22 so that the buffer spring 23 presses the lead terminal 5, the connecting ball 21 and the bottom pin 41. Then, the external electrical appliance is connected through the lead terminal 5, thereby establishing an electrical connection with the connecting ball 21 and the pin 41. The pin 41 can be tested without the use of the PCB test board 31.

[0032] In the early stages of manufacturing, the connecting ball 21, as a key component for achieving electrical connections, directly impacts the stability of test signals and the reliability of contact through its material selection. To achieve excellent conductivity and durable mechanical strength, the connecting ball 21 is often made of highly conductive metals or other alloys. For example, using copper or brass ensures low-loss transmission of test current due to their excellent conductivity. Furthermore, the good plasticity of copper or brass facilitates processing into spherical structures, and surface plating further enhances oxidation resistance and the smoothness of the contact surface. Using materials such as phosphor bronze, which combine conductivity and elasticity, ensures shape stability during repeated crimping and insertion / removal processes, reducing poor contact caused by plastic deformation. Additionally, while stainless steel has slightly lower conductivity, its excellent corrosion and wear resistance makes it suitable for testing scenarios with high mechanical life requirements or in specific corrosive environments. In general, the selection of the material for the connecting ball 21 should take into account conductivity efficiency, mechanical durability, resistance to environmental oxidation, and stability of contact resistance with pin 41 and lead terminal 5, so as to ensure the accuracy and reliability of electrical connection during the test.

[0033] When operating through the side hole 12, insert the DuPont male wire connector or other standard lead terminal 5 horizontally through the side hole 12, ensuring its metal core extends into the crimping hole 11 and rests against the connecting pressure ball 21. Then, adjust the corresponding crimping screw 22 until it is aligned with the pressure scale line of the corresponding pressure setting. While the connecting pressure ball 21 presses against the lower pin 41, it also firmly clamps the lead terminal 5 between the connecting pressure ball 21 and the buffer spring 23, forming a stable electrical path. After testing, simply unscrew the crimping screw 22 in the opposite direction; the buffer spring 23 will automatically spring back to release the pressure, allowing the lead terminal 5 to be easily pulled out from the side hole 12, enabling quick disassembly and reuse. This mode is particularly suitable for R&D debugging, incoming material inspection, and other situations requiring frequent changes to test signals or temporary test circuit setups, significantly improving testing efficiency and flexibility.

[0034] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0035] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An adjustable clamp for metal tube lead pins, characterized in that, It includes: The fixture body (1) has a metal tube shell docking station on it; A crimping unit (2) is located on the fixture body (1) and is provided with multiple units corresponding to the number of pins (41). The crimping unit (2) is used to press the pins (41) against the PCB test board (31). And a pressure measuring unit, which is disposed on the clamp body (1) and is used to display the pressure on the pin (41) when a single crimping unit (2) abuts against a single pin (41); The clamp body (1) has multiple crimping holes (11) vertically arranged around the metal tube shell docking station. The number of crimping holes (11) corresponds to the number of pins (41). The crimping unit (2) is disposed in the crimping holes (11). The crimping unit (2) includes: Connect the pressure ball (21), which is located inside the crimping hole (11); And a crimping member, which is connected to the connecting ball (21) and is used to push the connecting ball (21) toward the pin (41) until the pin (41) is abutted against the PCB test board (31); The crimping hole (11) is configured as a threaded hole, and the crimping member includes: A crimping screw (22) is threaded into the crimping hole (11); In addition, the buffer spring (23) has its two ends in the length direction connected to the crimping screw (22) and the connecting ball (21), respectively.

2. The adjustable clamp for metal tube lead as described in claim 1, characterized in that: The clamp body (1) is transparent, and the pressure measuring unit includes: The pressure scale is set on the fixture body (1) and has multiple pressure levels spaced apart along the depth direction of the crimping hole (11).

3. An adjustable clamp for metal tube lead as described in claim 1, characterized in that: The connecting ball (21) is made of conductive material. The clamp body (1) has a side hole (12) on its side wall. The side hole (12) is provided on the top surface of the connecting ball (21) and communicates with the crimping hole (11). The side hole (12) is used for the lead terminal (5) to pass through.

4. An adjustable clamp for metal tube lead as described in claim 1, characterized in that, The pressure metering unit includes: A pressure sensor is used to connect to pin (41) and display the pressure applied to pin (41).

5. A crimping test device for metal tube shell pins, characterized in that, It includes: An adjustable clamp for metal tube lead as described in any one of claims 1-4.

6. The crimping test device for metal tube shell pins as described in claim 5, characterized in that, It also includes: Test base (3); PCB test board (31) is set on the test base (3) and has a metal tube shell placement station. The fixture body (1) is set on the PCB test board (31). The metal tube shell placement station is set in correspondence with the metal tube shell docking station. The crimping unit (2) is used to press the pin (41) against the PCB test board (31). And a fastener for securing the PCB test board (31) and the fixture body (1) to the test base (3).

7. The crimping test device for metal tube shell pins as described in claim 6, characterized in that, The fastener includes: The fastening bolt (32) passes through the PCB test board (31) and is connected to the test base (3), or passes through the fixture body (1) and the PCB test board (31) in sequence and is connected to the test base (3).

8. The crimping test apparatus for metal tube shell pins as described in claim 6, characterized in that, It also includes: A support member (33) is disposed between the PCB test board (31) and the test base (3).

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