Test fixture for floating pressing of needle block

Abstract

The utility model discloses a test fixture for floating and pressing a probe block, and aims to provide the test fixture for floating and pressing the probe block, which is simple in structure and ensures that a probe can reach a preset compression amount and stably pierce the probe through a plurality of floating structures. The device comprises a cover turning jig and a bottom plate jig, the cover turning jig comprises a cover turning outer frame, a cover turning back plate, a floating balance module and an upper needle block, the bottom plate jig comprises a bottom plate and a lower needle block, a rotating shaft is arranged at one end of the cover turning outer frame, a plurality of rotating blocks are arranged at one end of the bottom plate and are in rotating fit with the rotating shaft, and the balance module comprises a balance plate. The balance plate is connected with the upper end face of the upper needle block through a plurality of first equal-height screws, a plurality of first floating springs are further arranged between the lower end face of the balance plate and the upper end face of the upper needle block, and the probe end of the upper needle block and the probe end of the lower needle block are matched with the two ends of a product on a product carrying plate on the upper end face of the bottom plate respectively. The test fixture is applied to the technical field of test fixtures.

Description

Technical Field

[0001] The utility model is applied to the technical field of test fixtures, and particularly relates to a test fixture with a needle block floating and pressing down. Background Art

[0002] With the popularity of smart phones, consumers have higher and higher requirements for cameras, and the size of camera modules is getting smaller and smaller. A series of tests are carried out during the assembly process of mobile phone cameras. The impedance test of the camera is one of the test items. The impedance test usually requires two probes under a single test point. The diameter and length of the probes are limited. Usually only small probes can be used. Small probes are very sensitive to compression. Too much or too little compression will affect the stability of the test, so it is necessary to improve a test fixture that can stably pierce the needle. The connection of the buckle fixture structure is complex, and the tolerance chain is long, which makes it difficult to ensure the compression of the probe. Now the size of the camera module is getting smaller and smaller, and the compression of the selected probe may be only 0.3mm. In order to achieve the purpose of smooth buckling, the buckle structure usually reserves a gap of about 0.1mm at the buckle. When the buckle structure pierces the product, the tolerance chain of the probe axial direction involves many structural parts. The theoretical probe axial tolerance can reach more than 0.3mm, which is very unfavorable for the probe piercing test. The uncertainty of the probe compression is very likely to cause unstable testing. At present, the probe compression amount of most fixtures on the market is relatively large, such as a four-wire test structure of a coil with a compact structure and stable test disclosed in publication number CN217739247U. The above utility model includes a flip cover buckle module and a test module, the flip cover buckle module includes a bottom plate lower clamp and a flip cover test upper clamp, one side of the flip cover test upper clamp is rotatably connected to one side of the bottom plate lower clamp, the test module includes a lower test module and an upper test module, the lower test module includes a test transfer carrier, an FPC bottom plate, a product clamp, a copper column group and two supporting copper columns, the test transfer carrier is arranged on the bottom plate lower clamp, the FPC bottom plate is arranged at the bottom of the test transfer carrier, the copper column group, the product clamp and the two supporting copper columns are all arranged on the test transfer board, the copper column group and the two supporting copper columns are all connected to the FPC bottom plate for communication, and the upper test module includes a signal transfer board, a spring needle module, a probe group and two spring needle groups. If a test fixture with a simple structure and multiple floating structures can be designed to ensure that the probe can reach a predetermined compression amount and the needle block floats downward for stable needle insertion, the above problems can be solved. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a test fixture with a simple structure, which ensures that the probe can reach a predetermined compression amount and the needle block floats downward for stable needle insertion through multiple floating structures.

[0004] The technical solution adopted by the utility model is: the utility model includes a flip jig and a base jig, the flip jig includes a flip outer frame, a flip back plate, a floating balancing module and an upper needle block, the base jig includes a base plate and a lower needle module, the flip outer frame is provided with a rotating shaft at one end, a plurality of rotating blocks are provided at one end of the base plate, and the plurality of rotating blocks are rotatably matched with the rotating shaft, the balancing module includes a balancing plate, the balancing plate is connected to the upper end surface of the upper needle block through a plurality of first equal height screws, a plurality of first floating springs are also provided between the lower end surface of the balancing plate and the upper end surface of the upper needle block, the balancing plate is pressed down and floated with the upper needle block through a plurality of the first equal height screws and a plurality of the first floating springs, the upper needle block probe end and the lower needle module probe end are respectively matched with the two ends of the product on the product carrier on the upper end surface of the base plate.

[0005] Furthermore, a rotating end on one side of the flip cover back plate is rotatably matched with the rotating shaft, sliding grooves are provided on both sides of the flip cover outer frame, and rotating shafts are provided on both sides of the balance plate. The rotating shafts on both sides of the balance plate are respectively slidably matched with the sliding grooves on both sides of the flip cover outer frame.

[0006] Furthermore, the balance plate is in floating cooperation with the flip cover back plate through a plurality of second floating springs and a plurality of second equal height screws.

[0007] Furthermore, the lower needle module includes a lower needle base plate and a lower needle block, the lower needle block is arranged on the upper end surface of the lower needle base plate, the base plate is provided with a connecting port adapted to the lower needle block, and the probe end of the lower needle block is connected to the product on the product carrier through the connecting port.

[0008] Furthermore, the product carrier plate is in floating cooperation with the base plate through a plurality of third floating springs and a plurality of third equal-height screws.

[0009] Furthermore, both ends of the upper end surface of the lower needle bottom plate are provided with connecting platforms, and the connecting platforms pass through the bottom plate and cooperate with the lower end surface of the upper needle block.

[0010] Furthermore, a plurality of limit platforms are arranged on the upper end surface of the bottom plate, and the plurality of limit platforms are in limited cooperation with the lower end surface of the flip cover back plate.

[0011] Furthermore, the rotating shaft is provided with a plurality of torsion springs, and the movable ends of the plurality of torsion springs are respectively matched with the bottom plate and the flip cover back plate.

[0012] Furthermore, a buckle is provided at the other end of the flip cover frame, and the rotating end of the buckle is rotationally matched with the flip cover frame through a rolling shaft and a plurality of fourth floating springs. The bottom plate is provided with a locking groove adapted to the hook end of the buckle, and the buckle cooperates with the locking groove.

[0013] Furthermore, the lower end surface of the upper needle block is provided with a plurality of positioning pins, the bottom plate is provided with a plurality of positioning holes, and the plurality of positioning pins and the plurality of positioning holes are positioned and matched.

[0014] The beneficial effects of the utility model are as follows: the flip cover jig is arranged as a split structure, and there may be an angle difference of 10 degrees between the flip cover outer frame and the flip cover back plate, so that the flip cover back plate is fitted with the bottom plate jig in advance when buckled, and there may be a height difference of 0-6mm between the balance plate and the flip cover back plate, and linkage pressing is performed through multiple groups of floating structures, so that pre-pressing contact with the product and then a second pressing can be performed, ensuring that there will be no over-pressure or misalignment during the pressing process, and plane displacement can be provided by the rotating shaft and the sliding groove, and the pressing position can be adaptively adjusted, and the pressing accuracy is higher, and when the buckle and the locking groove are locked, the upper needle block and the lower needle block just reach a predetermined compression amount on the product, and the flip cover jig pops up after unlocking to complete the separation, with a simple structure, convenient operation, and higher detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional view of the utility model;

[0016] Figure 2 It is a three-dimensional view of the utility model in a pressed state;

[0017] Figure 3 is a three-dimensional view of the flip cover jig;

[0018] Figure 4 is an exploded view of the flip cover jig;

[0019] Figure 5 is a three-dimensional view of the base plate fixture;

[0020] Figure 6 is an exploded view of the base plate fixture. DETAILED DESCRIPTION

[0021] like Figures 1 to 6As shown, in this embodiment, the utility model includes a flip jig 1 and a bottom plate jig 2, the flip jig 1 includes a flip outer frame 11, a flip back plate 12, a floating balance module 13 and an upper needle block 14, the bottom plate jig 2 includes a bottom plate 21 and a lower needle module 22, the flip outer frame 11 is provided with a rotating shaft 15 at one end, the bottom plate 21 is provided with a plurality of rotating blocks 23 at one end, and the plurality of rotating blocks 23 are rotatably matched with the rotating shaft 15, the balancing module 13 includes a balancing plate 131, and the balancing plate 131 It is connected to the upper end surface of the upper needle block 14 through a plurality of first equal-height screws 133, and a plurality of first floating springs 132 are further arranged between the lower end surface of the balance plate 131 and the upper end surface of the upper needle block 14. The balance plate 131 is pressed downward and floated in cooperation with the upper needle block 14 through a plurality of the first equal-height screws 133 and a plurality of the first floating springs 132, and the probe end of the upper needle block 14 and the probe end of the lower needle module 22 are respectively cooperated with the two ends of the product on the product carrier plate 24 on the upper end surface of the base plate 21. It can be seen that the flip cover jig 1 is configured as a split structure, and there may be an angle difference of 10 degrees between the flip cover frame 11 and the flip cover back plate 12. When buckled, the flip cover back plate 12 is allowed to fit together with the base plate jig 2 in advance. There may be a height difference of 0-6 mm between the balance plate 131 and the flip cover back plate 12. The multiple groups of floating structures are linked and pressed together. When the flip cover jig 1 and the base plate jig 2 are buckled together, several of the first floating springs 132 may apply elastic force to the upper needle module 22 to ensure that the probe in the upper needle module 22 reaches a predetermined compression amount, thereby stabilizing the test. The multiple groups of floating structures are linked and pressed together to achieve pre-pressing the contact product and then performing the second pressing to ensure that there is no over-pressure or misalignment during the pressing process.

[0022] like Figures 1 to 6 As shown, in this embodiment, the rotating end of one side of the flip cover back plate 12 is rotatably matched with the rotating shaft 15, the sliding grooves 16 are provided on both sides of the flip cover outer frame 11, and the rotating shafts 3 are provided on both sides of the balance plate 131. The rotating shafts 3 on both sides of the balance plate 131 are respectively slidably matched with the sliding grooves 16 on both sides of the flip cover outer frame 11. It can be seen that during the pressing process of the balance plate 131, the rotating shafts 3 and the sliding grooves 16 will adaptively adjust their positions laterally to make the positioning more accurate.

[0023] like Figure 4 As shown, in this embodiment, the balance plate 131 is in floating cooperation with the flip cover back plate 12 through a plurality of second floating springs 4 and a plurality of second equal height screws 5. It can be seen that the balance plate 131 first contacts the flip cover back plate 12 during the pressing process, and the plurality of second floating springs 4 provide a buffering effect to avoid overpressure.

[0024] like Figure 5 and Figure 6 As shown, in this embodiment, the lower needle module 22 includes a lower needle bottom plate 221 and a lower needle block 222, the lower needle block 222 is arranged on the upper end surface of the lower needle bottom plate 221, the bottom plate 21 is provided with a connecting port 25 adapted to the lower needle block 222, and the probe end of the lower needle block 222 is connected and conducted with the product on the product carrier 24 through the connecting port 25. It can be seen that the lower needle block 222 contacts and conducts with the connecting end of the lower end surface of the product through the connecting port 25.

[0025] like Figure 6 As shown, in this embodiment, the product carrier plate 24 is in floating cooperation with the bottom plate 21 through a plurality of third floating springs 6 and a plurality of third equal height screws 7. It can be seen that during the pressing process, due to the flip cover design, the upper needle block 14 is not in parallel pressing when in contact with the product, so during the pressing process, the product carrier plate 24 can be adjusted in a floating manner and adaptively adjusted following the rotation angle of the balance plate 131 to avoid unilateral overpressure on the product.

[0026] like Figure 5 and Figure 6 As shown, in this embodiment, both ends of the upper end surface of the lower needle bottom plate 221 are provided with connecting platforms 223, and the connecting platforms 223 pass through the bottom plate 21 and cooperate with the lower end surface of the upper needle block 14. It can be seen that after the pressing is completed, the connecting platform 223 and the upper needle block 14 are first connected and conducted.

[0027] like Figure 1 and Figure 6 As shown, in this embodiment, the upper end surface of the bottom plate 21 is provided with a plurality of limit platforms 8, and the plurality of limit platforms 8 are limitedly matched with the lower end surface of the flip cover back plate 12. It can be seen that the limit platforms 8 can prevent the pressing displacement from being too large to over-press the product and cause damage to the product.

[0028] like Figures 1 to 3 As shown, in this embodiment, the rotating shaft 15 is provided with a plurality of torsion springs 161, and the movable ends of the plurality of torsion springs 161 are respectively matched with the bottom plate 21 and the flip cover back plate 12. It can be seen that the plurality of torsion springs 151 provide buffering and restoring functions during the pressing and unlocking process.

[0029] like Figures 1 to 4As shown, in this embodiment, the other end of the flip cover outer frame 11 is provided with a buckle 17, and the rotating end of the buckle 17 is rotatably matched with the flip cover outer frame 11 through a rolling shaft 18 and a plurality of fourth floating springs 19, and the bottom plate 21 is provided with a locking groove 26 adapted to the hook end of the buckle 17, and the buckle 17 is matched with the locking groove 26. It can be seen that when the flip cover jig 1 is pressed against the bottom plate jig 2, the buckle 17 slides along the outer edge of the bottom plate 21, and when the hook end of the buckle 17 slides through the locking groove 26, the plurality of floating springs 19 drive the buckle 17 to clamp the locking groove 26 to lock the jig.

[0030] like Figure 1 As shown, in this embodiment, the lower end surface of the upper needle block 14 is provided with a plurality of positioning pins 9, and the bottom plate 21 is provided with a plurality of positioning holes 10, and the plurality of positioning pins 9 and the plurality of positioning holes 10 are positioned and matched. It can be seen that the plurality of positioning pins 9 and the plurality of positioning holes 10 provide positioning during the pressing process.

[0031] The working principle of the utility model is as follows: before starting the equipment, the buckle 17 is unlocked, and several of the torsion springs 161 drive the flip cover fixture 1 to open, and the product is placed on the product carrier 24, and the flip cover outer frame 11 is pressed down, and the flip cover back plate 12 first contacts the bottom plate 21, and the balance plate 131 is parallel to the product, and continues to press down. The upper needle block 14 contacts the connecting end of the upper end surface of the product, and continues to press down. Several of the first floating springs 132, several of the second floating springs 4 and several third floating springs 6 are adaptively adjusted, and the probe end of the upper needle block 14 and the probe end of the lower needle block 222 are respectively connected to the connecting ends at the upper and lower ends of the product for conduction, and the buckle 17 is buckled, and the test fixture is powered on for detection. After the detection is completed, the buckle 17 is opened to complete the unlocking, and the product to be tested is replaced. Repeat the above steps to complete the needle block floating downward pressure test.

[0032] Although the embodiments of the present invention are described with practical solutions, they do not constitute limitations on the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme and combine it with other solutions based on this description.

Claims

1. A needle block floating downward pressure test fixture, comprising a flip-top fixture (1) and a bottom plate fixture (2), characterized in that: The flip cover jig (1) comprises a flip cover outer frame (11), a flip cover back plate (12), a floating balance module (13) and an upper needle block (14); the bottom plate jig (2) comprises a bottom plate (21) and a lower needle module (22); a rotating shaft (15) is arranged at one end of the flip cover outer frame (11); a plurality of rotating blocks (23) are arranged at one end of the bottom plate (21); the plurality of rotating blocks (23) are rotatably matched with the rotating shaft (15); the balance module (13) comprises a balance plate (131); the balance plate (131) is fixedly connected to the bottom plate by a plurality of first equal height screws. (133) is connected to the upper end surface of the upper needle block (14), and a plurality of first floating springs (132) are also arranged between the lower end surface of the balance plate (131) and the upper end surface of the upper needle block (14). The balance plate (131) is pressed downward and floated with the upper needle block (14) through a plurality of the first equal height screws (133) and a plurality of the first floating springs (132). The probe end of the upper needle block (14) and the probe end of the lower needle module (22) are respectively matched with the two ends of the product on the product carrier plate (24) on the upper end surface of the base plate (21).

2. A needle block floating downward pressure test fixture according to claim 1, characterized in that: The rotating end of one side of the flip cover back plate (12) is rotatably matched with the rotating shaft (15), sliding grooves (16) are provided on both sides of the flip cover outer frame (11), and rotating shafts (3) are provided on both sides of the balance plate (131), and the rotating shafts (3) on both sides of the balance plate (131) are respectively slidably matched with the sliding grooves (16) on both sides of the flip cover outer frame (11).

3. A needle block floating downward pressure test fixture according to claim 2, characterized in that: The balance plate (131) is in floating cooperation with the flip cover back plate (12) via a plurality of second floating springs (4) and a plurality of second equal height screws (5).

4. A needle block floating downward pressure test fixture according to claim 1, characterized in that: The lower needle module (22) comprises a lower needle base plate (221) and a lower needle block (222); the lower needle block (222) is arranged on the upper end surface of the lower needle base plate (221); the base plate (21) is provided with a connecting port (25) adapted to the lower needle block (222); and the probe end of the lower needle block (222) is connected to the product on the product carrier (24) via the connecting port (25).

5. A needle block floating downward pressure test fixture according to claim 4, characterized in that: The product carrier plate (24) is in floating cooperation with the base plate (21) via a plurality of third floating springs (6) and a plurality of third equal-height screws (7).

6. A needle block floating downward pressure test fixture according to claim 4, characterized in that: Both ends of the upper end surface of the lower needle bottom plate (221) are provided with connecting platforms (223), and the connecting platforms (223) pass through the bottom plate (21) and cooperate with the lower end surface of the upper needle block (14).

7. The needle block floating downward pressure test fixture according to claim 1, characterized in that: The upper end surface of the bottom plate (21) is provided with a plurality of limit platforms (8), and the plurality of limit platforms (8) are in position-limiting cooperation with the lower end surface of the flip cover back plate (12).

8. The needle block floating downward pressure test fixture according to claim 1, characterized in that: The rotating shaft (15) is provided with a plurality of torsion springs (161), and the movable ends at both ends of the plurality of torsion springs (161) are respectively matched with the bottom plate (21) and the flip cover back plate (12).

9. The needle block floating downward pressing test fixture according to claim 1, characterized in that: A buckle (17) is provided at the other end of the flip cover outer frame (11), and the rotating end of the buckle (17) is rotationally matched with the flip cover outer frame (11) through a rolling shaft (18) and a plurality of fourth floating springs (19), and the bottom plate (21) is provided with a locking groove (26) adapted to the hook end of the buckle (17), and the buckle (17) is matched with the locking groove (26).

10. The needle block floating downward pressing test fixture according to claim 1, characterized in that: The lower end surface of the upper needle block (14) is provided with a plurality of positioning pins (9), and the bottom plate (21) is provided with a plurality of positioning holes (10). The plurality of positioning pins (9) and the plurality of positioning holes (10) are positioned and matched.

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