A PCB board that can replace the wiring of test fixtures and needle beds

By using PCB boards instead of traditional probe wiring and employing buffer guides and pin adjustment components, the problems of complex, costly, and inflexible traditional wiring processes are solved, achieving efficient and low-cost circuit board testing.

CN224287078UActive Publication Date: 2026-05-26GUANGDONG BEITE ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUANGDONG BEITE ELECTRONICS CO LTD
Filing Date
2025-07-15
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Traditional test fixtures with bed-of-nails have complex wiring processes, high costs, poor flexibility and adaptability, and are prone to damaging circuit boards, making it difficult to meet the rapid testing needs of miniaturized, high-density electronic products.

Method used

By replacing traditional probes with PCB boards, stability and flexibility are achieved through buffer guide components and pin adjustment components, reducing maintenance costs, protecting the circuit board, and adapting to changes in circuit board design.

Benefits of technology

It improves testing efficiency, reduces costs, enhances testing flexibility and reliability, reduces damage to circuit boards, and shortens test preparation time.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224287078U_ABST
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Abstract

This utility model relates to the field of PCB board testing technology and discloses a PCB board that can replace the bed-of-pipe wiring of test fixtures. It includes: a PCB support base plate, a PCB encapsulation cover plate, and a PCB board body. The PCB encapsulation cover plate is fixedly connected to the top surface of the PCB support base plate, and the PCB board body is slidably connected to the inner side of the PCB encapsulation cover plate. A buffer guide assembly is disposed between the PCB support base plate and the PCB board body. A pin connection adjustment assembly is disposed on the side of the PCB board body. This utility model improves stability and reliability through buffer guidance, enhances flexibility and shortens test preparation time through pin adjustment, reduces maintenance and customization costs and test errors by replacing traditional probes with a PCB board, and also reduces contact pressure to protect the circuit board under test. It solves the problems of complex process, high cost, poor flexibility and adaptability, and easy damage to test points associated with traditional bed-of-pipe wiring.
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Description

Technical Field

[0001] This utility model relates to the field of PCB board testing technology, specifically a PCB board that can replace the bed of needles wiring of testing fixtures. Background Technology

[0002] In the field of electronics manufacturing and testing, bed-of-pipe test fixtures have long been an important means of functional testing and performance verification of electronic products. Traditional bed-of-pipe test fixtures achieve electrical connection by directly contacting the probe array with the test points on the circuit board under test, thereby completing signal transmission and testing. However, as electronic products develop towards miniaturization, high density, and multifunctionality, the limitations of traditional bed-of-pipe test fixtures are becoming increasingly apparent. On the one hand, the manufacturing process of traditional bed-of-pipe test fixtures is complex and costly. The probe array needs to be customized and assembled according to the specific layout of the circuit board under test and the location of the test points. The manufacturing process requires extremely high precision, and even a slight deviation may lead to poor test contact or signal loss. Interference can affect the accuracy of test results. In addition, the probes in the bed-of-nails wiring are consumable parts that are easily worn during frequent use and need to be replaced regularly, which further increases the cost of use and maintenance workload. On the other hand, traditional bed-of-nails wiring has poor flexibility and adaptability. When the design of the circuit board under test is changed, such as adjusting the position of test points, adding or removing test points, the original bed-of-nails wiring cannot be used and a new bed-of-nails wiring needs to be redesigned and manufactured. This not only prolongs the test preparation cycle, but also increases the time cost of product development and production. At the same time, for the testing needs of small batches and multiple varieties of electronic products, the method of frequently changing bed-of-nails wiring is difficult to meet the requirements of rapid testing and production.

[0003] Furthermore, traditional bed-of-nails connections may cause physical damage to the test points of the circuit board under test during the testing process. Due to the large contact pressure between the probe and the test point, long-term testing may lead to wear of the plating on the test point surface, or even damage to the copper foil circuit of the circuit board, affecting the electrical performance and service life of the circuit board. With the development of modern electronic testing technology, the market urgently needs a new testing solution that can overcome the shortcomings of traditional bed-of-nails connections in testing fixtures, in order to improve testing efficiency, reduce testing costs, enhance testing flexibility, and meet the ever-changing testing needs of electronic products. To this end, we propose a PCB board that can replace bed-of-nails connections in testing fixtures. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a PCB board that can replace the wiring of the test fixture's needle bed, thus solving the aforementioned problems.

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

[0006] A PCB board that can replace the wiring of a test fixture bed of needles includes:

[0007] The PCB support base plate, PCB encapsulation cover plate, and PCB board body are provided. The top surface of the PCB support base plate is fixedly connected to the PCB encapsulation cover plate, and the inner side of the PCB encapsulation cover plate is slidably connected to the PCB board body.

[0008] A buffer guide assembly is provided between the PCB support base plate and the PCB board body. The top surface of the PCB board body has guide holes that are evenly distributed. The buffer guide assembly is provided inside the guide holes. The buffer guide assembly is used to slide guide and buffer the PCB board body.

[0009] A pin connection adjustment component is provided on the side of the PCB board body. The side of the PCB package cover is provided with a side mounting groove. The pin connection adjustment component is provided inside the side mounting groove. The pin connection adjustment component is used to adapt the pins of the PCB board body itself so as to directly connect to the test, replacing the original test fixture needle bed wiring.

[0010] Preferably, the buffer guide assembly consists of a buffer assembly and a guide assembly. The buffer assembly includes a sliding support plate and buffer springs. The top surface of the PCB support base plate is fixedly connected with buffer springs that are evenly distributed. The top surface of the buffer springs is fixedly connected with the sliding support plate. The top surface of the sliding support plate is fixedly connected with the PCB board body. The inner side of the PCB encapsulation cover plate is slidably connected with the sliding support plate and the PCB board body. The buffer assembly is used to buffer and protect the PCB board body.

[0011] Preferably, the guiding component includes guide posts, the top surface of the PCB support base plate is fixedly connected with guide posts that are evenly distributed, the top surface of the sliding support plate is provided with equally distributed connecting sliding holes, the connecting sliding holes and the guide holes are concentrically aligned, and the internal connecting sliding holes and the guide holes are slidably connected with guide posts, and the guiding component is used to slide and guide the PCB board body.

[0012] Preferably, the pin connection adjustment assembly consists of a pin connection assembly and a pin position adjustment assembly. The top surface of the PCB board body is fixedly connected with equally spaced pin connection bosses, which are used for fixed connection with the pin connection adjustment assembly.

[0013] Preferably, the pin connection assembly includes adapter pins, a side connecting platform, and a side adapter strip. The top surface of the pin connecting boss is fixedly connected to the adapter pins, the inner side of the side mounting groove is fixedly connected to the side adapter strip, one side of the top surface of the PCB support base plate is fixedly connected to the side connecting platform, one side of the side connecting platform is fixedly connected to the side adapter strip, the other side of the side adapter strip is slidably connected to equidistantly distributed adapter pins, and the inner side of the side mounting groove is slidably connected to equidistantly distributed adapter pins.

[0014] Preferably, the pin position adjustment assembly includes an adjustment fixing bolt and a pin fixing bracket. The top surface of the PCB package cover plate has equidistantly distributed positioning threaded holes, and the top surface of the pin fixing bracket has positioning sliding holes.

[0015] Preferably, a pin fixing bracket is slidably connected to the inner side of the side mounting groove, and an adapter pin is slidably connected to the bottom of the pin fixing bracket. The positioning threaded hole and the positioning sliding hole are concentrically aligned. An adjusting fixing bolt is threadedly connected to the inner side of the positioning threaded hole, and an adjusting fixing bolt is slidably connected to the inner side of the positioning sliding hole.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] A PCB board is provided that can replace the wiring of the test fixture's bed of needles, and has the following advantages:

[0018] This invention improves stability and reliability through buffer guidance, enhances flexibility and shortens test preparation time through pin adjustment, reduces maintenance and customization costs and test errors by replacing traditional probes with PCB boards, and also reduces contact pressure to protect the circuit board under test. It solves the problems of complex wiring process, high cost, poor flexibility and adaptability, and easy damage to test points in traditional bed of needles. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram showing the overall structure of this utility model disassembled;

[0021] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0022] Figure 4 This is a cross-sectional view of a portion of the pin connection adjustment assembly in this utility model.

[0023] In the diagram: 1. PCB support base plate; 2. PCB encapsulation cover plate; 3. PCB board body; 4. Guide post; 5. Adapter pin; 6. Adjustment fixing bolt; 7. Side connecting platform; 8. Sliding support plate; 9. Buffer spring; 10. Pin fixing bracket; 11. Positioning threaded hole; 12. Pin connecting boss; 13. Side adapter strip; 14. Connecting sliding hole; 15. Side mounting groove; 16. Positioning sliding hole; 17. Guide hole. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-4 This utility model provides a technical solution:

[0026] A PCB board that can replace the wiring of a test fixture bed of needles includes:

[0027] PCB support base plate 1, PCB encapsulation cover plate 2, PCB board body 3, the top surface of the PCB support base plate 1 is fixedly connected to the PCB encapsulation cover plate 2, and the inner side of the PCB encapsulation cover plate 2 is slidably connected to the PCB board body 3.

[0028] A buffer guide assembly is provided between the PCB support base plate 1 and the PCB board body 3. The top surface of the PCB board body 3 is provided with guide holes 17 that are evenly distributed. The inner side of the guide holes 17 is provided with a buffer guide assembly. The buffer guide assembly is used to slide guide and buffer the PCB board body 3.

[0029] A pin connection adjustment component is provided on the side of the PCB board body 3. The side of the PCB package cover plate 2 is provided with a side mounting groove 15. The pin connection adjustment component is provided on the inner side of the side mounting groove 15. The pin connection adjustment component is used to adapt the pins of the PCB board body 3 itself so as to directly connect to the test, replacing the original test fixture needle bed wiring.

[0030] Furthermore, the buffer guide assembly consists of a buffer component and a guide component. The buffer component includes a sliding support plate 8 and a buffer spring 9. The top surface of the PCB support base plate 1 is fixedly connected with equidistantly distributed buffer springs 9. The top surface of the buffer springs 9 is fixedly connected with the sliding support plate 8. The top surface of the sliding support plate 8 is fixedly connected with the PCB board body 3. The inner side of the PCB encapsulation cover plate 2 is slidably connected with the sliding support plate 8 and the PCB board body 3. The buffer component is used to buffer and protect the PCB board body 3. Through the function of the buffer component, the PCB board 3 is buffered and protected, avoiding damage to the PCB board 3 from external impacts.

[0031] Furthermore, the guiding component includes guide posts 4. The top surface of the PCB support base plate 1 is fixedly connected with guide posts 4 that are evenly distributed. The top surface of the sliding support plate 8 is provided with connecting sliding holes 14 that are evenly distributed. The connecting sliding holes 14 and the guide holes 17 are concentrically aligned. The guide posts 4 are slidably connected between the connecting sliding holes 14 and the guide holes 17. The guiding component is used to slide and guide the PCB board body 3. Through the action of the guiding component, the PCB board 3 is guided and slid inside the PCB encapsulation cover plate 2.

[0032] Furthermore, the pin connection adjustment assembly consists of a pin connection assembly and a pin position adjustment assembly. The top surface of the PCB board body 3 is fixedly connected with equally spaced pin connection bosses 12. The pin connection bosses 12 are used to fix the connection with the pin connection adjustment assembly. Through the function of the pin connection adjustment assembly, the pins that need to be tested for connectivity can be adjusted according to the requirements, and the connection can be switched to achieve direct connectivity testing, avoiding the traditional bed of pins wiring test.

[0033] Furthermore, the pin connection assembly includes adapter pins 5, side connection platform 7, and side adapter strip 13. The top surface of the pin connection boss 12 is fixedly connected to the adapter pins 5, the inner side of the side mounting groove 15 is fixedly connected to the side adapter strip 13, one side of the top surface of the PCB support base plate 1 is fixedly connected to the side connection platform 7, one side of the side connection platform 7 is fixedly connected to the side adapter strip 13, the other side of the side adapter strip 13 is slidably connected to the equidistantly distributed adapter pins 5, and the inner side of the side mounting groove 15 is slidably connected to the equidistantly distributed adapter pins 5.

[0034] Furthermore, the pin position adjustment assembly includes an adjustment fixing bolt 6, a pin fixing bracket 10, and a equidistantly distributed positioning threaded hole 11 on one side of the top surface of the PCB package cover plate 2. The top surface of the pin fixing bracket 10 is provided with a positioning sliding hole 16.

[0035] Furthermore, a pin fixing plate 10 is slidably connected to the inner side of the side mounting groove 15, and an adapter pin 5 is slidably connected to the bottom of the pin fixing plate 10. The positioning threaded hole 11 and the positioning sliding hole 16 are concentrically aligned. An adjusting fixing bolt 6 is threadedly connected to the inner side of the positioning threaded hole 11, and an adjusting fixing bolt 6 is slidably connected to the inner side of the positioning sliding hole 16.

[0036] Structural Description:

[0037] PCB support base plate 1: The top surface is fixedly connected to the PCB package cover plate 2 to form a frame, providing support for the overall structure. The side connecting platform 7 is fixed on one side of the top surface to support the side adapter strip 13.

[0038] PCB package cover plate 2: It forms a fixed frame with the PCB support base plate 1. The inner side allows the PCB board body 3 and the sliding support plate 8 to slide. The side has a side mounting groove 15 for installing the pin connection adjustment component. The top surface has a positioning threaded hole 11.

[0039] PCB board body 3: core functional carrier, with guide holes 17 on the top surface to cooperate with guide posts 4 to achieve sliding guidance, and fixed pins on the top surface to connect bosses 12 to install adapter pins 5, and sliding connection with the inner side of PCB package cover plate 2 through sliding support plate 8;

[0040] Guide hole 17: It is opened on the top surface of the PCB board body 3 and is slidably connected to the guide post 4. It is used to limit the sliding direction of the PCB board body 3 and ensure that it moves vertically along the guide post 4.

[0041] Side mounting slot 15: It is opened on the side of the PCB package cover plate 2, and the side adapter strip 13 is fixed on the inside, providing sliding space for the adapter pin 5 and the pin fixing plate 10;

[0042] Connecting sliding hole 14: It is opened on the top surface of the sliding support plate 8 and is concentrically aligned with the guide hole 17, allowing the guide post 4 to pass through, so that the sliding support plate 8 and the PCB board body 3 can slide synchronously along the guide post 4.

[0043] Pin connection boss 12: fixed to the top surface of PCB board body 3, used to install adapter pin 5, so as to realize the electrical connection between adapter pin 5 and the internal circuit of PCB board body 3;

[0044] Positioning threaded hole 11: It is opened on one side of the top surface of the PCB package cover plate 2 and is concentrically aligned with the positioning sliding hole 16 of the pin fixing plate 10. The position of the pin fixing plate 10 can be locked by adjusting the fixing bolt 6 to cooperate with the positioning sliding hole 16.

[0045] Positioning sliding hole 16: It is opened on the top surface of the pin fixing plate 10 and is concentrically aligned with the positioning threaded hole 11. It allows the adjusting fixing bolt 6 to pass through and cooperates with the positioning threaded hole 11 to realize the sliding and locking of the pin fixing plate 10.

[0046] Sliding support plate 8: The top surface is fixedly connected to the PCB board body 3, and the bottom surface is connected to the PCB support base plate 1 through the buffer spring 9. The top surface has a connecting sliding hole 14 to cooperate with the guide post 4 to realize the sliding and buffering of the PCB board body 3.

[0047] Buffer spring 9: Fixed to the top surface of PCB support base plate 1, the top surface is connected to sliding support plate 8, and absorbs external impact force through compression and reset, playing a buffering and protective role for PCB board body 3;

[0048] Guide post 4: Fixed to the top surface of PCB support base plate 1, passing through the connecting sliding hole 14 of sliding support plate 8 and the guide hole 17 of PCB board body 3 to form a guide structure, ensuring the accurate direction of PCB board body 3 when sliding;

[0049] Adapter pin 5: The pin connection boss 12 is fixed to the PCB board body 3, and the other end is inserted into the sliding groove of the side adapter strip 13. It can slide laterally to adapt to the position of the test point of the circuit board under test.

[0050] Side connecting platform 7: Fixed to one side of the top surface of PCB support base plate 1, used to fix the side adapter strip 13 and provide stable support for the pin connection assembly;

[0051] Side adapter strip 13: fixed to the inside of the side connecting platform 7 and the side mounting groove 15, and the other side is for the adapter pin 5 to slide, providing a track for adjusting the position of the adapter pin 5;

[0052] Adjusting fixing bolt 6: Passes through the positioning sliding hole 16 of the pin fixing plate 10 and is threadedly connected to the positioning threaded hole 11 of the PCB package cover plate 2. The sliding and locking of the pin fixing plate 10 are controlled by adjusting the tightness.

[0053] Pin fixing plate 10: It is embedded in the inner side of the side mounting groove 15, and the bottom groove locks the middle of the adapter pin 5. By sliding, the adapter pin 5 is adjusted to adjust the horizontal position, and the pin position is locked in conjunction with the adjusting fixing bolt 6.

[0054] Working principle: When this utility model is used, the PCB support base plate 1 and the PCB encapsulation cover plate 2 form a fixed frame. The PCB board body 3 is slidably connected to the inner side of the frame through the sliding support plate 8. When subjected to external pressure, the buffer spring 9 is compressed to absorb the impact force. After the pressure is removed, the spring resets and drives the PCB board body to return to its original position. The guide post 4 passes through the connecting sliding hole 14 of the sliding support plate and the guide hole 17 of the PCB board body to form a guide structure, ensuring that the PCB board body slides accurately and without deviation. At the same time, the adapter pin 5 is fixed on the pin connecting boss 12 of the PCB board body, and the other end is inserted into the sliding groove of the side adapter strip 13, which can move laterally to adapt to the test points at different positions of the circuit board under test. When adjusting, loosen the adjusting fixing bolt 6, push the pin fixing plate 10 to slide in the side mounting groove 15, drive the adapter pin to adjust the horizontal position, tighten the bolt after positioning, lock it through the positioning threaded hole 11 and the positioning sliding hole 16, and connect the external test port through the side connecting plate 7 to complete the test of the PCB board.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PCB board that can replace a test fixture pin bed wiring, characterized by, include: PCB support base plate (1), PCB encapsulation cover plate (2), PCB board body (3), the top surface of the PCB support base plate (1) is fixedly connected to the PCB encapsulation cover plate (2), and the inner side of the PCB encapsulation cover plate (2) is slidably connected to the PCB board body (3). A buffer guide assembly is provided between the PCB support base plate (1) and the PCB board body (3). The top surface of the PCB board body (3) is provided with guide holes (17) that are evenly distributed. The inner side of the guide holes (17) is provided with a buffer guide assembly. The buffer guide assembly is used to slide guide and buffer protect the PCB board body (3). A pin connection adjustment component is provided on the side of the PCB board body (3). The side of the PCB package cover plate (2) is provided with a side mounting groove (15). The pin connection adjustment component is provided on the inner side of the side mounting groove (15). The pin connection adjustment component is used to transfer the pins of the PCB board body (3) itself so as to directly connect to the test, replacing the original test fixture needle bed wiring.

2. The PCB board capable of replacing the test fixture needle bed connection according to claim 1, wherein, The buffer guide assembly consists of a buffer assembly and a guide assembly. The buffer assembly includes a sliding support plate (8) and a buffer spring (9). The top surface of the PCB support base plate (1) is fixedly connected with buffer springs (9) that are evenly distributed. The top surface of the buffer springs (9) is fixedly connected with the sliding support plate (8). The top surface of the sliding support plate (8) is fixedly connected with the PCB board body (3). The inner side of the PCB encapsulation cover plate (2) is slidably connected with the sliding support plate (8) and the PCB board body (3). The buffer assembly is used to buffer and protect the PCB board body (3).

3. The PCB of claim 2, wherein, The guiding component includes guide posts (4). The top surface of the PCB support base plate (1) is fixedly connected with guide posts (4) that are evenly distributed. The top surface of the sliding support plate (8) is provided with connecting sliding holes (14) that are evenly distributed. The connecting sliding holes (14) and the guide holes (17) are concentrically aligned. The internal connecting sliding holes (14) and the guide holes (17) are slidably connected with guide posts (4). The guiding component is used to slide and guide the PCB board body (3).

4. The PCB of claim 1, wherein, The pin connection adjustment assembly consists of a pin connection assembly and a pin position adjustment assembly. The top surface of the PCB board body (3) is fixedly connected with equally spaced pin connection bosses (12), which are used to be fixedly connected to the pin connection adjustment assembly.

5. The PCB of claim 4, wherein, The pin connection assembly includes adapter pins (5), side connection platform (7), and side adapter strip (13). The top surface of the pin connection boss (12) is fixedly connected to the adapter pins (5). The inner side of the side mounting groove (15) is fixedly connected to the side adapter strip (13). The top surface of the PCB support base plate (1) is fixedly connected to one side of the side connection platform (7). The side adapter strip (13) is fixedly connected to one side of the side connection platform (7). The other side of the side adapter strip (13) is slidably connected to the adapter pins (5) distributed at equal intervals. The inner side of the side mounting groove (15) is slidably connected to the adapter pins (5) distributed at equal intervals.

6. A PCB board that can replace the test fixture bed-of-pipe wiring according to claim 4, characterized in that, The pin position adjustment assembly includes an adjustment fixing bolt (6) and a pin fixing bracket (10). The top surface of the PCB package cover plate (2) is provided with equidistantly distributed positioning threaded holes (11), and the top surface of the pin fixing bracket (10) is provided with a positioning sliding hole (16).

7. A PCB board that can replace the test fixture bed-of-pipe wiring according to claim 6, characterized in that, The inner side of the side mounting groove (15) is slidably connected to a pin fixing plate (10), and the bottom of the pin fixing plate (10) is slidably connected to an adapter pin (5). The positioning threaded hole (11) and the positioning sliding hole (16) are concentrically aligned. The inner side of the positioning threaded hole (11) is threadedly connected to an adjusting fixing bolt (6), and the inner side of the positioning sliding hole (16) is slidably connected to an adjusting fixing bolt (6).