Grounding suspension test device of fingerprint chip

Abstract

The utility model provides a fingerprint chip grounding suspension test device, comprising a pedestal, the upper side of the pedestal is provided with a coordinate positioning mechanism used for positioning chip pins, the coordinate positioning mechanism is provided with a connecting mechanism used for replacing detection pins, the coordinate positioning mechanism comprises a support frame, and the support frame is provided with a clamping mechanism. Compared with the prior art, the device has the following beneficial effects that the coordinate positioning mechanism is arranged, a visual camera is combined with thread transmission and a positioning air cylinder, three-axis position adjustment is carried out on the probe, the position of the probe is adjusted, and the position of the probe is adjusted; the problem that the contact resistance is increased or the contact is unstable due to the position deviation of the contact point of the probe and the fingerprint chip is solved, in addition, the probe can be detached by moving the limiting ring to be separated from the ball through the arrangement of the connecting mechanism, and the probe is convenient to replace.

Description

Technical Field

[0001] This utility model belongs to the field of chip testing technology, and specifically relates to a grounding and floating test device for fingerprint chips. Background Technology

[0002] A grounding and floating test device for fingerprint chips is a specialized device used to test the electrical performance of fingerprint recognition chips. Its main function is to verify whether the grounding pin of the chip can be correctly suspended or grounded by simulating the electrical conditions of the actual working environment before the chip is installed in the final product, so as to ensure its signal integrity and anti-interference capability. However, grounding and floating test devices without a three-axis positioning mechanism have significant drawbacks. These drawbacks mainly stem from insufficient positioning accuracy and lack of contact stability. First, due to the lack of three-axis positioning capability, the probe cannot achieve high-precision three-dimensional adjustment when contacting the chip pin, which can easily lead to misalignment between the probe and the pin. This misalignment may manifest as the probe not being completely aligned with the center of the pin, or the contact angle between the probe and the pin being unsatisfactory, which in turn causes increased contact resistance or unstable contact. Therefore, we hope to design a grounding and floating test device for fingerprint chips to solve this problem. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a grounding and floating test device for fingerprint chips, so as to solve the problems mentioned in the background technology.

[0004] This utility model is achieved through the following technical solution: a grounding and suspension test device for a fingerprint chip, comprising: a base, wherein a coordinate positioning mechanism for positioning chip pins is provided on the upper side of the base, and a connecting mechanism for replacing the detection pin is provided on the coordinate positioning mechanism;

[0005] The coordinate positioning mechanism includes a support frame. A threaded rod is sleeved on the upper left side of the support frame via a bearing. A threaded rod is also sleeved on the left rear end of the base via a bearing. The threaded rod is screwed into the lower left end of the support frame via a thread.

[0006] The coordinate positioning mechanism also includes a mounting plate, a connecting block and a slider are fixedly connected to the rear side of the mounting plate, a positioning cylinder is fixedly installed at the lower end of the mounting plate, and a mounting block is connected to the lower side of the mounting plate by screws. A vision camera is provided on the mounting block. By setting up the coordinate positioning mechanism, the vision camera, combined with the threaded transmission and the positioning cylinder, reduces the positional deviation of the contact point between the probe and the fingerprint chip.

[0007] In a preferred embodiment, drive motors are provided on the right side of the support frame and the front side of the base, and the output shafts of the two drive motors are fixedly connected to the right end of threaded rod one and the front end of threaded rod two, respectively, via couplings.

[0008] In a preferred embodiment, a slide rail is fixedly installed on the upper front side of the support frame, and the slide rail is slidably engaged with the slider.

[0009] In a preferred embodiment, the connecting block is slidably sleeved inside the support frame, and the connecting block is screwed onto the outside of the threaded rod.

[0010] In a preferred embodiment, a sliding rod is fixedly connected inside the right end of the base. The sliding rod is slidably sleeved inside the support frame to reduce friction between the support frame and the inner surface of the base.

[0011] In a preferred embodiment, the connecting mechanism includes a connecting sleeve, which is fixedly connected to the telescopic end of the positioning cylinder. The connecting sleeve has a through hole, and a support cylinder is movably sleeved inside the connecting sleeve. The support cylinder has a groove, and balls are movably fitted inside both the groove and the through hole. By setting the connecting mechanism, it is convenient to replace the probe.

[0012] In a preferred embodiment, the through hole is a trapezoidal structure that is narrow near the center of the connecting sleeve and wide away from the center of the connecting sleeve, in order to prevent the ball bearings from falling into the interior of the connecting sleeve.

[0013] In a preferred embodiment, a fixing ring is fixedly sleeved on the outer side of the connecting sleeve, and a limiting ring is slidably sleeved on the outer side of the connecting sleeve. The limiting ring is in contact with a ball bearing, and the limiting ring and the fixing ring are elastically connected by a spring.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are:

[0015] 1. By setting up a coordinate positioning mechanism, using a vision camera combined with threaded transmission and positioning cylinder, the probe's three-axis position is adjusted, reducing the positional deviation of the contact point between the probe and the fingerprint chip, thus preventing problems such as increased contact resistance or unstable contact.

[0016] 2. By setting up a connecting mechanism, the probe can be disassembled and replaced by using a movable limiting ring to separate it from the ball. Attached Figure Description

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

[0018] Figure 1 This is a right-side oblique view of the overall structure of a fingerprint chip grounding and suspension test device according to this utility model.

[0019] Figure 2 This is a partial perspective view of the coordinate positioning mechanism of a fingerprint chip grounding and suspension testing device according to the present invention.

[0020] Figure 3 This is a perspective view of the base of a fingerprint chip grounding and suspension testing device according to the present invention.

[0021] Figure 4 This is a partial perspective view of a fingerprint chip grounding and suspension testing device according to the present invention.

[0022] Figure 5 This is an exploded cross-sectional view of the connection mechanism of a fingerprint chip grounding and suspension test device according to the present invention.

[0023] In the diagram, 1-base, 2-coordinate positioning mechanism, 3-connecting mechanism;

[0024] 21-Support frame, 22-Threaded rod one, 23-Threaded rod two, 24-Drive motor, 25-Mounting plate, 26-Connecting block, 27-Slider, 28-Slide rail, 29-Slide rod, 291-Positioning cylinder, 292-Mounting block, 293-Vision camera;

[0025] 31-Connecting sleeve, 32-Through hole, 33-Support cylinder, 34-Groove, 35-Ball, 36-Fixing ring, 37-Probe, 38-Spring. Detailed Implementation

[0026] 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.

[0027] Please see Figures 1 to 5This utility model provides a technical solution: a grounding and floating test device for a fingerprint chip, comprising: a base 1, a coordinate positioning mechanism 2 for positioning chip pins is provided on the upper side of the base 1, and a connecting mechanism 3 for replacing the detection pin is provided on the coordinate positioning mechanism 2.

[0028] The coordinate positioning mechanism 2 includes a support frame 21. The upper inner left side of the support frame 21 is connected to a threaded rod 22 via a bearing. The left inner rear end of the base 1 is also connected to a threaded rod 23 via a bearing. The threaded rod 23 is screwed into the lower left side of the support frame 21 via a thread.

[0029] The coordinate positioning mechanism 2 also includes a mounting plate 25. A connecting block 26 and a slider 27 are fixedly connected to the rear side of the mounting plate 25. A positioning cylinder 291 is fixedly installed at the lower end of the mounting plate 25. A mounting block 292 is connected to the lower side of the mounting plate 25 by screws. A vision camera 293 is provided on the mounting block 292. By setting the coordinate positioning mechanism 2, the vision camera 293, combined with the threaded transmission and the positioning cylinder 291, reduces the positional deviation of the contact point between the probe 37 and the fingerprint chip.

[0030] A drive motor 24 is provided on the right side of the support frame 21 and the front side of the base 1. The output shafts of the two drive motors 24 are fixedly connected to the right end of the first threaded rod 22 and the front end of the second threaded rod 23 respectively through couplings.

[0031] A slide rail 28 is fixedly installed on the upper front side of the support frame 21, and the slide rail 28 is slidably engaged with the slider 27.

[0032] The connecting block 26 is slidably sleeved inside the support frame 21, and the connecting block 26 is screwed onto the outside of the threaded rod 22 by threads.

[0033] A slide rod 29 is fixedly connected inside the right end of the base 1. The slide rod 29 is slidably sleeved inside the support frame 21 to reduce the friction between the support frame 21 and the inner surface of the base 1.

[0034] The connecting mechanism 3 includes a connecting sleeve 31, which is fixedly connected to the telescopic end of the positioning cylinder 291. The connecting sleeve 31 has a through hole 32, and a support cylinder 33 is movably sleeved inside the connecting sleeve 31. The support cylinder 33 has a groove 34, and ball bearings 35 are movably fitted inside both the groove 34 and the through hole 32. By setting the connecting mechanism 3, it is convenient to replace the probe 37.

[0035] The through hole 32 is a trapezoidal structure that is narrow near the center of the connecting sleeve 31 and wide away from the center of the connecting sleeve 31, in order to prevent the ball 35 from falling into the interior of the connecting sleeve 31.

[0036] A fixing ring 36 is fixedly sleeved on the outer side of the connecting sleeve 31, and a limiting ring 37 is slidably sleeved on the outer side of the connecting sleeve 31. The limiting ring 37 is in contact with the ball 35, and the limiting ring 37 and the fixing ring 36 are elastically connected by a spring 38.

[0037] Please see Figures 1 to 4 As the first embodiment of this utility model: In use, when it is necessary to position the pins of the chip, the vision camera 293 first acquires the target position image in real time and calculates the deviation between the position of the probe 37 and the target position. The deviation signal is transmitted to the controller, and the controller generates control commands, which cause the two drive motors 24 to drive the threaded rod 22 and the threaded rod 23 to rotate respectively. During the rotation of the threaded rod 22 and the threaded rod 23, they respectively generate threaded motion with the connecting block 26 and the support frame 21. Finally, the support frame 21 and the mounting plate 25 are displaced. The mounting plate 25 then drives the positioning cylinder 291 and the probe 37 to move, finally realizing the X and Y axis positioning of the probe 37, so as to reduce the position deviation of the contact point between the probe 37 and the fingerprint chip. Then, during testing, the controller generates control commands to extend and retract the telescopic end of the positioning cylinder 291 and drive the probe 37 to move downward, so as to realize the Z axis positioning of the probe 37 and control the grounding and suspension of the probe 37 and the chip pin.

[0038] Please see Figure 1 , Figure 4 as well as Figure 5 As a second embodiment of this utility model: Based on the above embodiments, when the probe 37 needs to be replaced, the limiting ring 37 is pushed upward, and the limiting ring 37 separates from the ball 35 during the displacement process. Then the probe 37 is pulled downward, and the upper end of the probe 37 squeezes the ball 35, causing the ball 35 to move outward to the outside of the connecting sleeve 31. When the ball 35 moves to the point where it is disengaged from the groove 34 of the support cylinder 33, the support cylinder 33 and the probe 37 can be taken out downward.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A grounding and floating test device for a fingerprint chip, comprising: The base (1) is characterized in that a coordinate positioning mechanism (2) for positioning chip pins is provided on the upper side of the base (1), and a connecting mechanism (3) for replacing the detection pin is provided on the coordinate positioning mechanism (2). The coordinate positioning mechanism (2) includes a support frame (21). The upper end of the support frame (21) is connected to a threaded rod (22) via a bearing on the left side. The left side of the base (1) is also connected to a threaded rod (23) via a bearing on the rear end. The threaded rod (23) is screwed into the lower left side of the support frame (21) via a thread. The coordinate positioning mechanism (2) also includes a mounting plate (25). A connecting block (26) and a slider (27) are fixedly connected to the rear side of the mounting plate (25). A positioning cylinder (291) is fixedly installed at the lower end of the mounting plate (25). A mounting block (292) is connected to the lower side of the mounting plate (25) by screws. A vision camera (293) is provided on the mounting block (292).

2. The grounding and floating test device for a fingerprint chip as described in claim 1, characterized in that: A drive motor (24) is provided on the right side of the support frame (21) and the front side of the base (1). The output shafts of the two drive motors (24) are fixedly connected to the right end of threaded rod one (22) and the front end of threaded rod two (23) respectively through couplings.

3. The grounding and floating test device for a fingerprint chip as described in claim 1, characterized in that: A slide rail (28) is fixedly installed on the upper front side of the support frame (21), and the slide rail (28) is slidably engaged with the slider (27).

4. The grounding and floating test device for a fingerprint chip as described in claim 1, characterized in that: The connecting block (26) is slidably sleeved inside the support frame (21), and the connecting block (26) is screwed onto the outside of the threaded rod (22) by threads.

5. The grounding and floating test device for a fingerprint chip as described in claim 1, characterized in that: A slide rod (29) is fixedly connected inside the right end of the base (1), and the slide rod (29) is slidably sleeved inside the support frame (21).

6. The grounding and floating test device for a fingerprint chip as described in claim 1, characterized in that: The connecting mechanism (3) includes a connecting sleeve (31), which is fixedly connected to the telescopic end of the positioning cylinder (291). The connecting sleeve (31) has a through hole (32), and a support cylinder (33) is movably sleeved inside the connecting sleeve (31). The support cylinder (33) has a groove (34), and balls (35) are movably fitted inside both the groove (34) and the through hole (32).

7. The grounding and floating test device for a fingerprint chip as described in claim 6, characterized in that: The through hole (32) is a trapezoidal structure that is narrow near the center of the connecting sleeve (31) and wide away from the center of the connecting sleeve (31), which is used to prevent the ball (35) from falling into the interior of the connecting sleeve (31).

8. The grounding and floating test device for a fingerprint chip as described in claim 6, characterized in that: A fixing ring (36) is fixedly sleeved on the outer side of the connecting sleeve (31), and a limiting ring (37) is slidably sleeved on the outer side of the connecting sleeve (31). The limiting ring (37) is in contact with the ball (35), and the limiting ring (37) and the fixing ring (36) are elastically connected by a spring (38).

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