B2B connector elastic sheet pin test structure
By adopting a U-groove design and floating structure in the B2B connector, the problems of wear and contact instability in the prior art are solved, and a longer service life and higher stability are achieved.
Patent Information
- Application Number
- CN202421890368.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-08-06
AI Technical Summary
The shrapnel pins of the existing B2B connectors have problems such as wear, unstable contact and short service life during screen detection of 0.175mm Pitch. In particular, traditional round probes and shrapnel pins are prone to sliding and friction and mechanical fatigue during use, resulting in poor contact.
A structure including a needle mold base, a B2B positioning plate, a shrapnel needle module, a lower needle plate and a needle block adapter plate was designed. The shrapnel needle head designed with a U-shaped groove is used for multi-point contact, and the grounding position of the ground needle is changed to the shrapnel needle tail, combining a floating structure to improve contact stability and service life.
Through the U-shaped groove design and floating structure, the contact area and service life of the shrapnel needle are improved, the contact area and service life are prevented, and the number of use is extended to 10W, reducing costs and improving the stability of the connector.
Smart Images
Figure CN223180392U_ABST
Abstract
Description
Technical Field
[0001] The utility model is applied to the technical field of B2B connector testing, and particularly relates to a testing structure for B2B connector spring needle contacts. Background Art
[0002] B2B connectors are usually used as signal transmission ports for PCBA or Flex products, and signal transmission is achieved by connecting and conducting with various components through the B2B connector ports. In the existing non-standard testing industry, the functional testing of the PCBA or Flex to be tested mainly uses spring needles or spring needle contacts to press-fit the test points on the product to be tested and the B2B connector, and a suitable voltage is loaded on the UUT through the B2B to provide an analog operating environment for the mobile phone screen to be tested, and the parameter responses of various states at the output end are measured and obtained to determine whether they meet the requirements, so as to judge the quality of the product to be tested. For the detection of the B2B male connector of the mobile phone screen with a pitch of 0.175mm, currently, traditional round probes pogo pins are mainly used for needle insertion connection. There is sliding friction between the components during the use of such traditional round probes, which is easy to wear and the actual service life is not long; at the same time, the resistances at the connections of the components are different, and the current will also decay at different parts, resulting in unstable connection or unstable current. In addition, the round head contacts the B2B contact piece at a single point, and there may be situations such as needle slipping, resulting in bent needles, stuck needles, or broken needles at the head needles. Or spring needle contacts are used to replace the traditional round probes. The designs of traditional spring needle contacts all have relatively deep splits in the middle, which will cause mechanical fatigue of the spring needle contacts after being used more than 50,000 times, resulting in an increase in the distance between the two sides of the spring needle contacts being worn, and an increase in the situation of poor contact after being used many times. And in traditional spring needle contacts, spring needle contacts are also used for the 4 grounding needles. Since the grounding needle contact points for inserting needles into the BTB are all on a plane, using beveled spring needle contacts will cause serious deflection and wear of the spring needle contacts, seriously reducing the service life of the spring needle contacts. If a testing structure for B2B connector spring needle contacts with a simple structure, accurate positioning, a U-shaped groove design to increase the needle insertion contact area and service life of the module can be designed, the above problems can be solved. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a testing structure for B2B connector spring needle contacts with a simple structure, accurate positioning, a U-shaped groove design to increase the needle insertion contact area and service life of the module.
[0004] The technical solution adopted by the present utility model is as follows: The present utility model includes a needle die base, a B2B positioning plate, a shrapnel needle module, a lower needle plate, and a needle block adapter plate. The shrapnel needle module includes a number of shrapnel needles and shrapnel needle rubber cores. The shrapnel needle rubber cores are arranged between the needle die base and the lower needle plate. The shrapnel needle rubber cores are provided with a number of first shrapnel needle through slots. A number of the shrapnel needles are matched with a number of the first shrapnel needle through slots. The head connection end of the shrapnel needle is provided with a U-shaped groove. The first contact point and the second contact point on both sides of the U-shaped groove are respectively matched with the connection end at the lower end of the B2B connector on the B2B positioning plate. A number of the tails of the shrapnel needles are provided with transfer protrusions. A number of the transfer protrusions are matched with the shrapnel needle connection ends on the upper end surface of the needle block adapter plate through a number of lower needle plate shrapnel needle through slots on the lower needle plate.
[0005] Furthermore, the shrapnel needle module further includes a number of probes. A number of first probe holes are also arranged on both sides of the shrapnel needle rubber core. A number of the probes are in limiting cooperation with a number of the first probe holes. The probe ends on a number of the probes are matched with the connection end at the lower end of the B2B connector. The lower needle plate is provided with a number of lower needle plate probe through openings. The lower probe ends of a number of the probes are matched with the probe connection ends on the upper end surface of the needle block adapter plate through a number of the lower needle plate probe through openings.
[0006] Furthermore, a rubber core profiling groove is arranged on the lower end surface of the needle die base. The shrapnel needle rubber core and the rubber core profiling groove are in limiting cooperation.
[0007] Furthermore, a number of second shrapnel needle grooves and second probe holes are arranged on the upper end surface of the needle die base. The B2B positioning plate is provided with a number of third shrapnel needle grooves and a number of third probe holes that are adapted to a number of the second shrapnel needle grooves and a number of the second probe holes. The head connection end of the shrapnel needle is matched with the connection end at the lower end of the B2B connector on the upper end of the needle die base through the second shrapnel needle groove and the third shrapnel needle groove.
[0008] Furthermore, a number of second shrapnel needle grooves and second probe holes are arranged on the upper end surface of the needle die base. The B2B positioning plate is provided with a number of third shrapnel needle grooves and a number of third probe holes that are adapted to a number of the second shrapnel needle grooves and a number of the second probe holes. The head connection end of the shrapnel needle is matched with the connection end at the lower end of the B2B connector on the upper end of the needle die base through the second shrapnel needle groove and the third shrapnel needle groove.
[0009] Furthermore, the B2B positioning plate is floatingly connected to the upper end surface of the needle die base through a number of floating springs and a number of equal-height screws.
[0010] Further, a first profiling groove and a second profiling groove are provided on the upper end surface of the B2B positioning plate. The first profiling groove is in limit fit with the B2B connector, and the second profiling groove is in limit fit with the connection end at the lower end of the B2B connector.
[0011] Further, the middle part of the shrapnel pin is provided with a multi-segment bending structure.
[0012] The beneficial effects of the present utility model are as follows: For the detection of the B2B male connector of the mobile phone screen with a 0.175mm Pitch, the head of the shrapnel pin adopts a U-shaped groove structure. The U-shaped needle head has a high error tolerance, and the design of the U-shaped head also has a guiding function. As long as the connector is clamped into the U-shaped groove, there will be no poor contact; even if the first contact point of the U-shaped groove expands after long-term friction, it will continue to rub downward, and there will be no poor contact. The theoretical service life is increased to 100,000 times. And this design changes the existing method of the ground pin inserting downward, and changes the head of the shrapnel pin to the tail of the shrapnel pin for grounding; since the grounding positions of the connector are all flat surfaces, using the tail of the shrapnel pin for grounding can improve the contact rate and save costs, and is provided with a floating structure to prevent the shrapnel pin from scratching the B2B connector during the pressing process. Description of the Drawings
[0013] Figure 1 is the three-dimensional view of the present utility model;
[0014] Figure 2 is the exploded view of the present utility model;
[0015] Figure 3 is the three-dimensional view of the shrapnel pin module;
[0016] Figure 4 is the plan view of the shrapnel pin;
[0017] Figure 5 is the three-dimensional view of the B2B positioning plate;
[0018] Figure 6 The three-dimensional view of the needle die base;
[0019] Figure 7 is the three-dimensional view of another perspective of the needle die base;
[0020] Figure 8 is the three-dimensional view of the needle inserting plate;
[0021] Figure 9 is the partial structure three-dimensional schematic diagram in the needle inserting state. Detailed Embodiments
[0022] Such as Figures 1 to 9As shown, in this embodiment, the utility model includes a needle die base 1, a B2B positioning plate 2, a shrapnel needle module 3, a lower needle plate 4, and a needle block adapter plate 5. The shrapnel needle module 3 includes a plurality of shrapnel needles 31 and shrapnel needle rubber cores 32. The shrapnel needle rubber cores 32 are arranged between the needle die base 1 and the lower needle plate 4. The shrapnel needle rubber cores 32 are provided with a plurality of first shrapnel needle through grooves 33. A plurality of the shrapnel needles 31 are matched with the plurality of first shrapnel needle through grooves 33. The head connection end of the shrapnel needle 31 is provided with a U-shaped groove 34. The first contact point 35 and the second contact point 36 on both sides of the U-shaped groove 34 are respectively matched with the connection end at the lower end of the B2B connector 6 on the B2B positioning plate 2. A plurality of transfer protrusions 37 are arranged at the tails of the plurality of shrapnel needles 31. The plurality of transfer protrusions 37 are matched with the shrapnel needle connection ends on the upper end surface of the needle block adapter plate 5 through a plurality of lower needle plate shrapnel needle through grooves 41 on the lower needle plate 4. Thus, it can be seen that the head of the shrapnel needle 31 is provided with the U-shaped groove 34. The protruding positions of the inner edge endpoints of the U-shaped groove 34 are the first contact point 35 and the second contact point 36 respectively. When the U-shaped groove 34 contacts the connection end of the B2B connector 6, the first contact point 35 and the second contact point 36 can make multi-point contact with the connection end of the B2B connector 6, with a self-guiding function, preventing the occurrence of poor contact or contact offset.
[0023] As Figure 3 and Figure 9 shown, in this embodiment, the shrapnel needle module 3 further includes a plurality of probes 38. A plurality of first probe holes 39 are also arranged on both sides of the shrapnel needle rubber core 32. The plurality of probes 38 are in limit fit with the plurality of first probe holes 39. The probe ends on the plurality of probes 38 are matched with the connection end at the lower end of the B2B connector 6. The lower needle plate 4 is provided with a plurality of lower needle plate probe through ports 42. The lower probe ends of the plurality of probes 38 are matched with the probe connection ends on the upper end surface of the needle block adapter plate 5 through the plurality of lower needle plate probe through ports 42. Thus, it can be seen that the smaller lower needle points on the connection end of the B2B connector 6 are cooperatively used for lower needle through the probes 38.
[0024] As Figure 7 shown, in this embodiment, a rubber core profiling groove 7 is arranged on the lower end surface of the needle die base 1. The shrapnel needle rubber core 32 and the rubber core profiling groove 7 are in limit fit. Thus, it can be seen that the rubber core profiling groove 7 can prevent the shrapnel needle rubber core 32 from shifting during the lower needle process, resulting in poor contact between the shrapnel needle 31 and the B2B connector 6.
[0025] As Figures 5 to 7As shown, in this embodiment, the upper end surface of the needle mold base 1 is provided with a plurality of second elastic needle grooves 8 and second probe holes 9, and the B2B positioning plate 2 is provided with a plurality of third elastic needle grooves 10 and a plurality of third probe holes 11 that are compatible with the plurality of second elastic needle grooves 8 and the plurality of second probe holes 9. The head connection end of the elastic needle 31 is matched with the connection end of the lower end of the B2B connector 6 at the upper end of the needle mold base 1 through the second elastic needle groove 8 and the third elastic needle groove 10. It can be seen that the plurality of elastic needles 31 and the plurality of probes 38 can accurately match the corresponding lower needle points of the B2B connector 6 through the plurality of limiting grooves and the plurality of limiting holes.
[0026] like Figure 4 and Figure 9 As shown, in this embodiment, the U-shaped groove 34 guides and cooperates with the connection end of the lower end of the B2B connector 6, and the first contact point 35 and the second contact point 36 respectively cooperate with the two sides of the connection end of the lower end of the B2B connector 6. As can be seen, when the U-shaped groove 34 contacts the connection end of the B2B connector 6, the first contact point 35 and the second contact point 36 can make multi-point contact with the connection end of the B2B connector 6, providing a self-guided function. As long as the connection end of the B2B connector is snapped into the U-shaped groove 34, there will be no poor contact.
[0027] like Figure 2 and Figure 6 As shown, in this embodiment, the B2B positioning plate 2 is floatingly connected to the upper end surface of the needle mold base 1 via a plurality of floating springs 12 and a plurality of height-adjustable screws 13. Thus, the plurality of floating springs 12 and the plurality of height-adjustable screws 13 provide a downward pressure buffer to prevent scratches on the product connection end caused by overpressure.
[0028] like Figure 5 As shown, in this embodiment, the upper end surface of the B2B positioning plate 2 is provided with a first contoured groove 21 and a second contoured groove 22. The first contoured groove 21 is engaged with the B2B connector 6, and the second contoured groove 22 is engaged with the connection end at the lower end of the B2B connector 6. Thus, the first contoured groove 21 and the second contoured groove 22 can stably fix the B2B connector 6 to the B2B positioning plate 2, preventing it from shifting during the pressing process.
[0029] like Figure 4 As shown, in this embodiment, the middle portion of the spring needle 31 is configured as a multi-section bending structure. This shows that the multi-section bending structure can disperse the stress points and extend the service life of the spring needle.
[0030] Working principle of the utility model: Before the equipment test, place the B2B connector 6 on the B2B positioning plate 2, position the B2B connector 6 through the first profiling groove 21 and the second profiling groove 22, continue to press down, the B2B positioning plate 2 descends, the heads of the spring needles 31 and the heads of the probes 38 pass through the needle die base 1 and the B2B positioning plate 2 and contact the lower connection end of the B2B connector 6. The first contact point 35 and the second contact point 36 perform multi-point needle connection on the lower connection end of the B2B connector 6 and conduct power-on detection. After the detection is completed, the B2B positioning plate 2 returns to the initial position, replace the B2B connector 6 to be tested, and repeat the above steps to achieve multi-point needle detection of the B2B connector.
[0031] Although the embodiments of the present utility model are described with actual solutions, they do not constitute a limitation to the meaning of the present utility model. For those skilled in the art, modifications to its implementation solutions according to this specification and combinations with other solutions are obvious.
Claims
1. A test structure for B2B connector spring pins, comprising a needle die base (1), a B2B positioning plate (2), a spring pin module (3), a lower needle plate (4), and a needle block adapter plate (5), characterized in that: The shrapnel pin module (3) includes a number of shrapnel pins (31) and a shrapnel pin rubber core (32). The shrapnel pin rubber core (32) is arranged between the needle die base (1) and the lower needle plate (4). The shrapnel pin rubber core (32) is provided with a number of first shrapnel pin through grooves (33). A number of the shrapnel pins (31) are matched with the number of the first shrapnel pin through grooves (33). The head connection end of the shrapnel pin (31) is provided with a U-shaped groove (34). The first contact point (35) and the second contact point (36) on both sides of the U-shaped groove (34) are respectively matched with the connection end at the lower end of the B2B connector (6) on the B2B positioning plate (2). A number of the shrapnel pins (31) are provided with transfer protrusions (37) at the tails. A number of the transfer protrusions (37) are matched with the shrapnel pin connection ends on the upper end surface of the needle block transfer board (5) through a number of lower needle plate shrapnel pin through grooves (41) on the lower needle plate (4).
2. The B2B connector shrapnel pin test structure according to claim 1, characterized in that: The shrapnel pin module (3) further includes a number of probes (38). A number of first probe holes (39) are also arranged on both sides of the shrapnel pin rubber core (32). A number of the probes (38) are in limit fit with the number of the first probe holes (39). The probe ends on a number of the probes (38) are matched with the connection end at the lower end of the B2B connector (6). The lower needle plate (4) is provided with a number of lower needle plate probe through ports (42). The lower probe ends of a number of the probes (38) are matched with the probe connection ends on the upper end surface of the needle block transfer board (5) through a number of the lower needle plate probe through ports (42).
3. The B2B connector shrapnel needle test structure according to claim 2, characterized in that: The lower end surface of the needle die base (1) is provided with a rubber core profiling groove (7). The shrapnel pin rubber core (32) and the rubber core profiling groove (7) are in limit fit.
4. A B2B connector shrapnel needle test structure according to claim 2, characterized in that: The upper end surface of the needle die base (1) is provided with a number of second shrapnel pin grooves (8) and second probe holes (9). The B2B positioning plate (2) is provided with a number of third shrapnel pin grooves (10) and a number of third probe holes (11) adapted to the number of the second shrapnel pin grooves (8) and the number of the second probe holes (9). The head connection end of the shrapnel pin (31) is matched with the connection end at the lower end of the B2B connector (6) at the upper end of the needle die base (1) through the second shrapnel pin groove (8) and the third shrapnel pin groove (10).
5. The test structure of the B2B connector spring needle according to claim 1, characterized in that: The U-shaped groove (34) is in guiding fit with the connection end at the lower end of the B2B connector (6). The first contact point (35) and the second contact point (36) are respectively matched with both sides of the connection end at the lower end of the B2B connector (6).
6. The test structure of the B2B connector spring needle according to claim 1, characterized in that: The B2B positioning plate (2) is floatingly connected to the upper end surface of the needle die base (1) through a number of floating springs (12) and a number of equal-height screws (13).
7. The test structure of the B2B connector spring needle according to claim 1, characterized in that: The upper end surface of the B2B positioning plate (2) is provided with a first profiling groove (21) and a second profiling groove (22). The first profiling groove (21) is in limit fit with the B2B connector (6). The second profiling groove (22) is in limit fit with the connection end at the lower end of the B2B connector (6).
8. The test structure of the B2B connector spring needle according to claim 1, characterized in that: The middle part of the shrapnel pin (31) is set as a multi-segment bending structure.