A multi-pin-count substrate detection device

Abstract

The utility model discloses a kind of multi-pin number substrate detection devices, including rack, and the upper side of detection station is equipped with detection mechanism in each of feeding station and detection station;The detection mechanism includes jig mounting seat, detection jig and the pressing mechanism of driving detection jig pressing;The jig mounting seat is used to carry detection jig, and chute is equipped on jig mounting seat, and the edge of detection jig is slidably installed in chute;The pressing mechanism includes pressing seat, moving seat and the pressing power component of driving moving seat translation, and moving seat and pressing seat are with inclined plane to resist;The jig mounting seat is installed on pressing seat, and moving seat drives pressing seat to lift through inclined plane.The utility model utilizes the inclined plane cooperation structure of moving seat and pressing seat, converts horizontal driving force into vertical pressing force, can provide greater driving force in vertical direction to control upper and lower jig, realize whole plate one-time full detection, perfect matching high-density probe array pressing demand.

Description

Technical Field

[0001] This utility model relates to the field of substrate testing technology, and in particular to a multi-pin substrate testing device. Background Technology

[0002] In the electronics manufacturing industry, printed circuit boards (PCBs), as the core carriers of electronic devices, need to have their electrical performance and structural reliability verified using specialized testing fixtures. In traditional testing systems, upper and lower fixture mounting bases are located on opposite sides of the testing station. The edges of the testing fixtures are engaged in the slide rails of the upper and lower fixture mounting bases for installation and fixation. During testing, a motor-driven lead screw mechanism generates vertical movement, causing the upper and lower fixture mounting bases to move and press the fixtures together. At this point, the high-density probe array on the fixtures makes reliable contact with the substrate pads, completing critical tests such as continuity, insulation resistance, and signal integrity.

[0003] As electronic products become increasingly complex, the industry faces two major technological bottlenecks: First, when the substrate size exceeds 550mm×650mm and the number of test points climbs to 32,000, the density of fixture probes surges accordingly. Taking the lower fixture as an example, when the number of probes at the lower fixture is 64K, based on the industry standard of 8 grams of pressing force per probe, the total pressure generated by 64K probes is approximately 524KG (64*1024*8g). The lower fixture itself weighs approximately 90KG. During testing, the lower fixture needs to be positioned on the X and Y axes and rotated in the θ direction to ensure accurate contact between the probes and the substrate pads when pressing along the Z axis. The total weight of the corresponding position adjustment structure, rotation adjustment structure, and fixture mounting base is approximately 1500KG. In other words, when adjusting the lower fixture for pressing with a lead screw, a force of 2.1~2.2 tons is required, which far exceeds the load capacity of traditional lead screw motors. After the lead screw adjustment fixture completes the pressing, it also requires a force of approximately 1.6 tons to lift the upper detection mechanism, which far exceeds the load capacity of traditional lead screw motors. Secondly, the existing slide rail mounting structure, when dealing with large fixtures, especially when the upper fixture is only connected to the slide rail by its edge, may cause deformation problems in the central area between the two slide rails due to the large weight of the upper fixture itself. When the deformation exceeds a certain range, it will cause some probes in the central area to have difficulty protruding (i.e., affecting the length of the probe exposed outside the mounting plate), as well as some probes on both sides near the slide rails to have poor contact with the substrate or signal acquisition distortion.

[0004] Currently, to avoid the aforementioned problems, a partitioned testing scheme using small testing fixtures is typically adopted for large-size substrates. This involves dividing the large-size substrate into multiple testing areas and using small testing fixtures for step-by-step testing. However, step-by-step testing requires frequent movement of the substrate or fixture, and each positioning and calibration takes a long time, severely affecting testing efficiency and making it difficult to meet the needs of large-volume testing. Utility Model Content

[0005] To address the aforementioned issues, this invention provides a multi-pin substrate testing device that can complete the testing of large-size substrates with multiple test points in one go, significantly improving testing efficiency.

[0006] Therefore, the technical solution of this utility model is: a multi-pin substrate testing device, including a frame, a feeding station and a testing station on the frame, and a testing mechanism on the upper and lower sides of the testing station.

[0007] The testing mechanism includes a fixture mounting base, a testing fixture, and a pressing mechanism for pressing the testing fixture together.

[0008] The fixture mounting base is used to support the testing fixture, and the fixture mounting base is provided with a sliding groove, in which the edge of the testing fixture slides.

[0009] The pressing mechanism includes a pressing seat, a movable seat, and a pressing power component that drives the movable seat to move horizontally. The movable seat and the pressing seat abut against each other with an inclined surface. The fixture mounting seat is mounted on the pressing seat, and the movable seat drives the pressing seat to rise and fall through the inclined surface.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the testing fixture is provided with a mounting hole; the fixture mounting base is provided with a locking block opposite to the mounting hole, and the locking block can be inserted into the mounting hole for fixation.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: the middle of the testing fixture is the substrate testing area, and the two sides are needle plate mounting plates. The needle plate mounting plates are equipped with test needle plates, and the mounting holes are located in the middle of the needle plate mounting plates.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme: the substrate detection area is assembled from multiple fixture units, and each fixture unit is provided with several detection probes.

[0013] Based on the above scheme and as a preferred embodiment of the above scheme: the mounting hole is a long slot hole, the shape of the locking block is adapted to the long slot hole, the locking block can be inserted into the mounting hole and rotated to fix it on the testing fixture.

[0014] Based on the above scheme and as a preferred embodiment of the above scheme: the fixture mounting base is provided with a lifting cylinder, and a lifting plate is installed on the cylinder rod of the lifting cylinder; the lifting plate is provided with a rotatably mounted connecting rod, and a locking block is located at one end of the connecting rod.

[0015] Based on the above scheme and as a preferred embodiment of the above scheme: the lifting plate is provided with at least two connecting rods, the other end of the connecting rods is fixed with a pulley, and adjacent pulleys are connected by a belt; a fixing block is provided on the cylinder rod of the first cylinder; the first cylinder drives the belt to move through the fixing block.

[0016] Based on the above scheme and as a preferred embodiment of the above scheme: the movable seat is provided with a first inclined surface on the side facing the pressing seat; the pressing seat is provided with a second inclined surface on the side facing the movable seat; a first guide rail is provided on the first inclined surface, and a first slider that slides and engages with the first guide rail is provided on the second inclined surface; or, a first guide rail is provided on the second inclined surface, and a first slider that slides and engages with the first guide rail is provided on the first inclined surface.

[0017] Based on the above scheme and as a preferred embodiment of the above scheme: the pressing mechanism further includes a base, a second guide rail is provided on the base, and a second slider is provided on the movable seat that slides in cooperation with the second guide rail; the pressing power component drives the movable seat to translate along the second guide rail.

[0018] Based on the above scheme and as a preferred embodiment of the above scheme: the pressing power assembly includes a pressing motor and a lead screw. The pressing motor is mounted on the base and its output end is connected to the horizontally set lead screw. The moving seat is provided with a movable block that is threadedly engaged with the lead screw. The pressing motor drives the moving seat to translate along the second guide rail through the lead screw.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] By utilizing the inclined surface cooperation structure of the moving seat and the pressing seat, the horizontal driving force is converted into the vertical driving force, which can provide greater driving force in the vertical direction to control the upper and lower fixtures. This allows for the use of large-scale testing fixtures with multiple needles assembled from multiple fixture units to achieve one-time full inspection of the entire board under the coordinated pressing of the upper and lower fixtures. This perfectly matches the pressing requirements of high-density probe arrays and significantly improves efficiency compared to traditional partitioned testing methods.

[0021] Mounting holes are provided on the needle plate of the testing fixture, and the mounting holes are located in the middle blank area of ​​the needle plate mounting plate. The mounting holes do not interfere with the normal installation of the test needle plate. After the edge of the testing fixture is inserted into the slide groove of the fixture mounting base, the testing fixture is further fixed by the locking block on the fixture mounting base. This avoids the problem of deformation in the central area between the slide grooves, thereby preventing the sunken plate surface from affecting the extension length of the probe in the central area and causing poor contact between the probes on both sides near the slide groove and the substrate, thus improving the accuracy of signal acquisition. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a side view of the structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the pressing mechanism of this utility model;

[0025] Figure 4 This is a cross-sectional view of the pressing mechanism of this utility model;

[0026] Figure 5 This is a schematic diagram of the fixture mounting base of this utility model;

[0027] Figure 6 This is a structural schematic diagram of the fixture mounting base of this utility model (from another angle);

[0028] Figure 7 This is a structural cross-sectional view of the fixture mounting base of this utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the testing fixture of this utility model.

[0030] The components in the diagram are labeled as follows: 1. Frame; 2. Feeding track; 3. Moving base; 3. Clamping component; 4. Fixture mounting base; 40. Slide groove; 41. Locking block; 42. Lifting cylinder; 43. Lifting plate; 44. Connecting rod; 45. First cylinder; 46. Pulley; 47. Belt; 48. Fixing block; 5. Detection fixture; 51. Mounting hole; 52. Substrate detection area; 53. Test needle plate; 54. Fixture unit; 55. Needle plate mounting plate; 6. Pressing mechanism; 61. Base; 62. Pressing seat; 63. Moving seat; 64. Second guide rail; 65. Second slider; 66. Pressing motor; 67. Lead screw; 68. Movable block; 69. First guide rail; 610. First slider; 611. Guide plate; 612. Limiting stop bar; 613. Vertical guide rail; 614. Vertical slider. Detailed Implementation

[0031] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. They should not be construed as limiting the specific protection scope of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0033] See the attached drawings. The multi-pin substrate testing device described in this embodiment includes a frame 1, which has a loading station and a testing station. The frame 1 is also provided with a loading track 2. The loading track 2 is provided with a slidingly fitted movable base 3, which can move along the loading track 2 between the loading station and the testing station.

[0034] The movable base 3 has a hollow center, and multiple clamping members 31 for fixing substrates are provided around the hollow center. The substrate to be tested is placed on the movable base 3 and fixed by the clamping members 31, and can be pushed into the testing station.

[0035] Each of the upper and lower ends of the testing station is equipped with a set of testing mechanisms. The testing mechanism includes a fixture mounting base 4, a testing fixture 5, and a pressing mechanism 6 for pressing the testing fixture together. One side of the fixture mounting base 4 is mounted on the pressing mechanism 6, and the other side is used to support the testing fixture 5. A groove 40 is provided at the long edge of the fixture mounting base 4, and the long edge of the testing fixture 5 can be inserted into the groove 40 to fix the testing fixture 5.

[0036] The testing fixture 5 has a substrate testing area 52 in the middle, where the testing probes are used to connect with the test points on the substrate. On both sides are needle plate mounting plates 55, on which test needle plates 53 are mounted. Test machine interface probes on the mounting plates 55 are used to connect to the testing equipment. Multiple elongated slotted mounting holes 51 are machined on the needle plate mounting plates 55. These mounting holes 51 can be located in the middle of the back of the needle plate mounting plate 55, in a blank area that does not interfere with the test needle plates 53. A locking block 41 corresponding to the mounting hole 51 is provided at the corresponding position on the fixture mounting base 4, along with a fixing component that drives the locking block 41 to rotate and move. The locking block 41 is adapted to the elongated slot shape of the mounting hole 51. The locking block 41 can be inserted into the mounting hole 51 and rotated 90 degrees, so that the locking block 41 is locked in the mounting hole 51 for fixation.

[0037] During installation of the testing fixture 5, the edge of the testing fixture 5 is inserted into the groove 40 of the fixture mounting base 4. Then, the locking block 41 on the fixture mounting base 4 is used to further fix the middle area of ​​the needle plate mounting plate 55, preventing the central area of ​​the needle plate mounting plate 55 from sinking and deforming. This prevents the sunken plate surface from affecting the extension length of the probes on the test needle plate 43, thus improving the accuracy of signal acquisition. Preferably, the mounting hole 51 is located in the middle of the direction perpendicular to the groove 40 and close to the substrate detection area 52, thereby further preventing the central area of ​​the substrate detection area 52 of the testing fixture 5 from sinking and deforming.

[0038] The substrate detection area 52 is assembled from multiple fixture units 54. Each fixture unit 54 is equipped with a probe array for the tested end. Multiple fixture units 54 are assembled into a complete tested end detection area, which can perform one-time detection on large substrates without the need for partitioning operations, thus improving detection efficiency.

[0039] The fixing assembly includes a lifting cylinder 42, a lifting plate 43, a connecting rod 44, and a first cylinder 45. Two lifting cylinders 42 are fixed to the back of the fixture mounting base 4. The cylinder rods of the two lifting cylinders 42 are connected to the lifting plate 43, enabling the lifting plate 43 to rise and fall. Two connecting rods 44 are rotatably mounted on the lifting plate 43 via bearings, with a locking block 41 located below the connecting rods 44. Pulleys 46 are fixed to the top of the two connecting rods 44, and adjacent pulleys 46 are connected by a belt 47. A fixing block 48 is provided on the cylinder rod of the first cylinder 45. When the first cylinder 45 is ventilated, it pushes the fixing block 48 forward, causing the fixing block 48 to move the belt 47. The belt 47 then rotates the two pulleys 46, which in turn rotate the connecting rods 44, ultimately causing the connecting rods 44 to rotate the locking block 41.

[0040] Initially, the lifting plate 43 is located at the position furthest from the fixture mounting base 4, that is, the locking block 41 is located in the groove of the fixture mounting base 4 and does not protrude from the surface of the fixture mounting base. Moreover, the orientation of the locking block 41 matches the mounting hole 51, so it can be smoothly inserted into the mounting hole. Then, the inspection fixture 5 is inserted into the slide groove 40 from one end of the fixture mounting base 4. After it is installed in place, the lifting cylinder 42 drives the lifting plate 43 to move towards the fixture mounting base 4. The lifting plate 43 drives the connecting rod 44 to move, so that the locking block 41 under the connecting rod 44 is inserted into the mounting hole 51. Next, the first cylinder 45 is vented, which drives the fixing block 48 to move, so that the belt 47 drives the two pulleys 46 to rotate. Finally, the connecting rod 44 drives the locking block 41 to pass through the mounting hole 51 and rotates 90 degrees so that the locking block 41 is locked inside the mounting hole 51, completing the installation of the inspection fixture 5.

[0041] The pressing mechanism 6 includes a base 61, a pressing seat 62, a movable seat 63, and a pressing power assembly that drives the movable seat 63 to translate. The base 61 is provided with a second guide rail 64, and the movable seat 63 is provided with a second slider 65 that slides with the second guide rail 64. The pressing power assembly includes a pressing motor 66 and a lead screw 67. The pressing motor 66 is mounted on the base 61, and its output end is connected to the horizontally arranged lead screw 67. The movable seat 63 is provided with a movable block 68 that is threadedly engaged with the lead screw 67. The pressing motor 66 drives the movable seat 63 to translate along the second guide rail 64 through the lead screw 67.

[0042] The movable seat 63 has a first inclined surface facing the pressing seat 62, and a first guide rail 69 is provided on the first inclined surface. The angle between the first inclined surface and the horizontal direction is 20 degrees, so the angle between the direction perpendicular to the first inclined surface and the vertical direction is 20 degrees. The pressing seat 62 has a second inclined surface facing the movable seat 63, and a first slider 610 that slides in cooperation with the first guide rail 69 is provided on the second inclined surface. The base 61 has guide plates 611 on both sides. The guide plate 611 has a limiting stop bar 612 on the side away from the pressing motor 66. The guide plate 611 has a vertical guide rail 613. The pressing seat 62 has a vertical slider 614 on its side that slides with the vertical guide rail 613. The fixture mounting seat 4 is fixed on the pressing seat 62. When the pressing motor 66 drives the moving seat 63 to move horizontally relative to the base 61 along the second guide rail 64, its first inclined surface can give the pressing seat 62 a force perpendicular to the second inclined surface. However, due to the restriction of the vertical guide rail 613 and the limiting stop bar 612, the pressing seat 62 cannot move horizontally and can only move vertically along the vertical guide rail 613, thereby pushing the fixture mounting seat 4 to move vertically and realizing the pressing of the testing fixture 5.

[0043] Figure 3 This is a schematic diagram of the lower pressing mechanism of this utility model; Figure 4 This is a cross-sectional view of the upper pressing mechanism of this utility model. The upper pressing mechanism and the lower pressing mechanism each have a pressing motor 66.

[0044] When a 2t driving force is required in the vertical direction, a conventional lead screw motor cannot directly provide a 2t vertical driving force. However, in this embodiment, as shown... Figure 4 As shown, when the angle of the first inclined plane is 20 degrees, the pressing motor 66 only needs to apply a driving force of about 0.7279t (2t*tan20) in the horizontal direction. This inclined plane structure can provide more than 2 tons of vertical driving force through the horizontal drive of the pressing motor 66 and the lead screw 67, which perfectly matches the pressing requirements of the high-density probe array.

[0045] In addition, the angle between the first inclined plane and the horizontal direction does not have to be 20 degrees. The larger the angle, the greater the driving force required by the pressing motor 66, and the smaller the angle, the longer the stroke of the lead screw 67.

[0046] In use, the movable base 3 is located at the loading station. The large substrate to be tested is placed in the hollow area in the middle of the movable base, and the edge of the large substrate is fixed by the clamping member 31. Then the movable base 3 is pushed into the testing station. After it is in place, the testing fixtures 5 on the upper and lower sides of the testing station move towards each other to press the large substrate, so that the probes on the substrate testing area 52 contact the test points on the large substrate one by one, and the testing of the large substrate is completed in one go.

[0047] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A multi-pin substrate inspection device, comprising a frame, characterized in that: The frame is equipped with a feeding station and an inspection station, and the inspection station is equipped with an inspection mechanism on the upper and lower sides. The testing mechanism includes a fixture mounting base, a testing fixture, and a pressing mechanism for pressing the testing fixture together. The fixture mounting base is used to support the testing fixture, and the fixture mounting base is provided with a sliding groove, in which the edge of the testing fixture slides. The pressing mechanism includes a pressing seat, a movable seat, and a pressing power component that drives the movable seat to move horizontally. The movable seat and the pressing seat abut against each other with an inclined surface. The fixture mounting seat is mounted on the pressing seat, and the movable seat drives the pressing seat to rise and fall through the inclined surface.

2. The multi-pin substrate detection device as described in claim 1, characterized in that: The testing fixture is provided with a mounting hole; the fixture mounting base is provided with a locking block that is opposite to the mounting hole, and the locking block can be inserted into the mounting hole for fixation.

3. The multi-pin substrate detection device as described in claim 2, characterized in that: The testing fixture has a substrate testing area in the middle and needle plate mounting plates on both sides. Test needle plates are mounted on the needle plate mounting plates, and the mounting holes are located in the middle of the needle plate mounting plates.

4. The multi-pin substrate detection device as described in claim 3, characterized in that: The substrate detection area is assembled from multiple fixture units, and each fixture unit is equipped with several detection probes.

5. The multi-pin substrate detection device as described in claim 2, characterized in that: The mounting hole is a long slot, and the shape of the locking block is adapted to the long slot. The locking block can be inserted into the mounting hole and rotated to fix it on the testing fixture.

6. The multi-pin substrate detection device as described in claim 2, characterized in that: The fixture mounting base is equipped with a lifting cylinder, and a lifting plate is mounted on the cylinder rod of the lifting cylinder; the lifting plate is equipped with a rotatably mounted connecting rod, and a locking block is located at one end of the connecting rod.

7. The multi-pin substrate detection device as described in claim 6, characterized in that: The lifting plate is provided with at least two connecting rods, and a pulley is fixed to the other end of the connecting rod. Adjacent pulleys are connected by a belt. A fixing block is provided on the cylinder rod of the first cylinder. The first cylinder drives the belt to move through the fixing block.

8. The multi-pin substrate detection device as described in claim 1, characterized in that: The movable seat has a first inclined surface on the side facing the pressing seat; the pressing seat has a second inclined surface on the side facing the movable seat; a first guide rail is provided on the first inclined surface, and a first slider that slides and engages with the first guide rail is provided on the second inclined surface; or, a first guide rail is provided on the second inclined surface, and a first slider that slides and engages with the first guide rail is provided on the first inclined surface.

9. The multi-pin substrate detection device as described in claim 1, characterized in that: The pressing mechanism also includes a base, on which a second guide rail is provided, and on which a second slider is provided that slides with the second guide rail; the pressing power component drives the movable seat to translate along the second guide rail.

10. The multi-pin substrate detection device as described in claim 9, characterized in that: The pressing power assembly includes a pressing motor and a lead screw. The pressing motor is mounted on the base and its output end is connected to the horizontally set lead screw. The moving seat is provided with a movable block that is threadedly engaged with the lead screw. The pressing motor drives the moving seat to translate along the second guide rail through the lead screw.

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