Fingerprint chip detection device capable of controlling applied pressure

Abstract

The utility model relates to a fingerprint chip detection device with controllable applied pressure, which belongs to the technical field of fingerprint chips and comprises a supporting table, a workbench is fixed in the middle of the upper surface of the supporting table, a fixing mechanism for fixing chips of different sizes is arranged at the right end of the lower surface of the supporting table, and a mounting frame is fixed on the upper surface of the supporting table. A detection mechanism for applying different pressures is arranged in the middle of the inner top wall of the mounting frame; the fixing mechanism comprises a protection box fixed to the right end of the lower surface of the supporting table, and a driving motor is fixed to an inner cavity of the protection box. According to the fingerprint chip detection device capable of controlling the applied pressure, the fixing mechanism is arranged in the inner cavity of the workbench, a chip to be detected is placed in the groove, the two ends of the chip to be detected can be positioned, the fingerprint chip detection device can adapt to detection of fingerprint chips of different sizes, the fixing stability is good, the situations of chip deformation and warping are prevented, and the detection efficiency is improved. And the practicability is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fingerprint chips, in particular to a fingerprint chip detection device with controllable applied pressure. Background Art

[0002] Fingerprint chip refers to a chip product with embedded fingerprint recognition technology. It is a chip that can realize fingerprint image acquisition, feature extraction, and feature comparison on-chip. Developers can easily implement the fingerprint recognition function, which greatly reduces the threshold of the fingerprint recognition industry and has a very positive role in promoting the promotion of fingerprint recognition.

[0003] Through searching, it is found that Chinese patent publication number: CN207249057U discloses a test device for testing fingerprint chips, including a test machine and a pressing mechanism, the pressing mechanism is arranged above the test machine, the test machine is provided with a groove for placing the chip to be tested, and the bottom of the groove is provided with an adsorption component for sucking the chip to be tested, the pressing mechanism includes a conductive rubber head made of a flexible and conductive material and a driving component for driving the conductive rubber head to move up and down to apply a preset pressure to the chip to be tested. Compared with the prior art, the utility model adopts a conductive rubber head made of a flexible and conductive material to apply pressure to the chip to be tested, which is more in line with the actual use of the chip. A capacitor effect can be formed between the conductive rubber head and the chip to be tested, the test is more accurate, and the work efficiency is improved. However, due to the different sizes of the chips, if a larger chip to be tested is placed in the groove, the adsorption hole will have a smaller contact area with the chip to be tested, which makes it easy for the chip to deform and warp, reducing its practicality. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a fingerprint chip detection device with controllable pressure application, which has the advantages of fixing chips of different sizes to be tested, etc., and solves the problem that due to the different sizes of chips, if a larger chip to be tested is placed in the groove, the adsorption hole will have a smaller contact area with the chip to be tested, which will easily cause the chip to deform and warp, reducing the practicality.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fingerprint chip detection device with controllable pressure application, comprising a support table, a workbench is fixed in the middle of the upper surface of the support table, a fixing mechanism for fixing chips of different sizes is provided at the right end of the lower surface of the support table, a mounting frame is fixed on the upper surface of the support table, and a detection mechanism for applying different pressures is provided in the middle of the inner top wall of the mounting frame;

[0006] The fixing mechanism includes a protection box fixed to the right end of the lower surface of the support platform, a driving motor is fixed to the inner cavity of the protection box, the output shaft of the driving motor passes through the right side wall of the inner cavity of the protection box and extends to the right side of the protection box and is fixed with a No. 1 sprocket, a bidirectional screw is rotatably connected between the opposite sides of the left and right side walls of the inner cavity of the workbench through a bearing, a No. 2 sprocket is fixed to the right end of the outer surface of the bidirectional screw, the outer surfaces of the No. 1 sprocket and the No. 2 sprocket are meshed and connected with the same chain, the left and right ends of the outer surface of the bidirectional screw are threadedly connected with a screw sleeve, the upper surface of the screw sleeve is fixed with a splint, the upper surface of the splint passes through the workbench and extends to the top of the workbench.

[0007] Furthermore, a groove is provided in the middle of the upper surface of the workbench, mounting blocks are fixed on both left and right ends of the upper surface of the workbench, and a pressure sensor is fixed in the inner cavity of the mounting block.

[0008] Furthermore, a through hole is provided at the right end of the inner bottom wall of the workbench, and the size of the inner cavity of the through hole is adapted to the size of the chain.

[0009] Furthermore, the two screw sleeves are symmetrically distributed at the left and right ends of the vertical center axis of the bidirectional screw, a slider is fixed to the lower surface of the screw sleeve, a slide bar is fixed to the inner bottom wall of the workbench, and the slider performs horizontal linear motion in the inner cavity of the slide bar.

[0010] Furthermore, a guide hole is provided on the inner bottom wall of the groove, and the bottom of the clamping plate performs horizontal linear motion in the inner cavity of the guide hole. Anti-skid pads are fixed on opposite sides of the two clamping plates, and the anti-skid pads are rubber pads.

[0011] Furthermore, the detection mechanism includes electric push rods fixed on the left and right ends of the top wall of the mounting frame, the output shafts of the two electric push rods are fixed with the same movable plate, a pressing block is fixed in the middle of the lower surface of the movable plate, and extrusion plates are fixed on both left and right ends of the lower surface of the movable plate.

[0012] Furthermore, support blocks are fixed on the upper and lower ends of the opposite sides of the left and right side walls of the inner cavity of the mounting frame, and a limiting rod is fixed between the opposite sides of the support blocks at the upper and lower ends. Limiting sleeves are fixed on the left and right sides of the movable plate, and the limiting sleeves make up and down linear movements on the outer surface of the limiting rod.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] 1. The fingerprint chip detection device with controllable pressure application has a fixing mechanism in the inner cavity of the workbench. The chip to be tested is placed in the groove, and both ends of the chip to be tested can be positioned. It can be adapted to detect fingerprint chips of different sizes, and has good fixing stability, which prevents chip deformation and warping, thereby improving practicality.

[0015] 2. The fingerprint chip detection device with controllable pressure application, when detecting the fingerprint chip, drives the movable plate to move through the output shafts of the two electric push rods, so that the pressing block moves and applies pressure to the chip to be tested. The movement of the movable plate drives the extrusion plate to move, and the extrusion plate can squeeze the mounting block, so that the force applied to the chip to be tested can be sensed by the pressure sensor, which is convenient for controlling the force applied to the chip to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the fixing mechanism structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of part of the fixing mechanism of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the detection mechanism of the utility model.

[0020] In the figure: 1 support table, 2 workbench, 3 fixing mechanism, 301 protection box, 302 driving motor, 303 No. 1 sprocket, 304 bidirectional screw, 305 No. 2 sprocket, 306 chain, 307 screw sleeve, 308 clamping plate, 4 mounting frame, 5 detection mechanism, 501 electric push rod, 502 movable plate, 503 pressing block, 504 extrusion plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1 In this embodiment, a fingerprint chip detection device with controllable pressure application includes a support table 1, a workbench 2 is fixed in the middle of the upper surface of the support table 1, a fixing mechanism 3 for fixing chips of different sizes is provided at the right end of the lower surface of the support table 1, a mounting frame 4 is fixed on the upper surface of the support table 1, and a detection mechanism 5 for applying different pressures is provided in the middle of the inner top wall of the mounting frame 4.

[0023] A groove is provided in the middle of the upper surface of the workbench 2 , and mounting blocks are fixed to both left and right ends of the upper surface of the workbench 2 , and a pressure sensor is fixed in the inner cavity of the mounting block.

[0024] See also Figure 2-3 In order to facilitate the fixing of fingerprint chips of different sizes, the fixing mechanism 3 in this embodiment includes a protection box 301 fixed to the right end of the lower surface of the support platform 1, and the inner cavity of the protection box 301 is fixed with a driving motor 302. The output shaft of the driving motor 302 passes through the right side wall of the inner cavity of the protection box 301 and extends to the right side of the protection box 301 and is fixed with a No. 1 sprocket 303. The chip to be tested is placed in the inner cavity of the groove, and then the driving motor 302 is started. The output shaft of the driving motor 302 rotates to drive the No. 1 sprocket 303 to rotate. A bidirectional screw 304 is rotatably connected between the opposite sides of the left and right side walls of the inner cavity of the workbench 2 through a bearing. A No. 2 sprocket 305 is fixed to the right end of the outer surface of the bidirectional screw 304. The No. 1 sprocket 303 and the No. 2 sprocket 305 are connected. The outer surface of 05 is meshed with the same chain 306, and the left and right ends of the outer surface of the bidirectional screw 304 are threadedly connected with screw sleeves 307. The rotation of the No. 1 sprocket 303 can move the chain 306, and the movement of the chain 306 causes the No. 2 sprocket 305 to rotate. The rotation of the No. 2 sprocket 305 causes the bidirectional screw 304 to rotate. The rotation of the bidirectional screw 304 causes the two screw sleeves 307 threadedly connected on its surface to move relative to each other. A clamping plate 308 is fixed to the upper surface of the screw sleeve 307. The upper surface of the clamping plate 308 passes through the workbench 2 and extends to the top of the workbench 2. The movement of the screw sleeve 307 causes the clamping plate 308 to move. At this time, the two clamping plates 308 move relative to each other until the two clamping plates 308 locate the position of the chip to be tested to prevent it from shaking.

[0025] Among them, a through hole is opened at the right end of the inner bottom wall of the workbench 2, the size of the inner cavity of the through hole is adapted to the size of the chain 306, and two screw sleeves 307 are symmetrically distributed at the left and right ends of the vertical center axis of the bidirectional screw 304. A slider is fixed to the lower surface of the screw sleeve 307, and a slide bar is fixed to the inner bottom wall of the workbench 2. The slider makes horizontal linear motion in the inner cavity of the slide bar, which can limit the movement of the screw sleeve 307 and make it move linearly.

[0026] In addition, a guide hole is provided on the inner bottom wall of the groove, and the bottom of the clamping plate 308 performs horizontal linear motion in the inner cavity of the guide hole. Anti-skid pads are fixed on opposite sides of the two clamping plates 308, and the anti-skid pads are rubber pads.

[0027] It should be noted that the fixing mechanism 3 can be used to position both ends of the chips to be tested of different sizes, and the fixing stability is good, thereby preventing the chips from being deformed and warped.

[0028] See also Figure 4In order to facilitate the control of the force applied to the chip to be tested, the detection mechanism 5 in this embodiment includes electric push rods 501 fixed at the left and right ends of the inner top wall of the mounting frame 4, and the output shafts of the two electric push rods 501 are fixed with the same movable plate 502. When the two electric push rods 501 are started, the output shafts of the two electric push rods 501 move downward, thereby driving the movable plate 502 to move downward. A pressing block 503 is fixed in the middle of the lower surface of the movable plate 502, and extrusion plates 504 are fixed at both the left and right ends of the lower surface of the movable plate 502. The movement of the movable plate 502 can drive the pressing block 503 to move, thereby applying pressure to the chip to be tested. The movement of the movable plate 502 drives the extrusion plate 504 to move, and the extrusion plate 504 can squeeze the mounting block, so that the force applied to the chip to be tested can be sensed by the pressure sensor.

[0029] Among them, support blocks are fixed on the upper and lower ends of the opposite sides of the left and right side walls of the inner cavity of the mounting frame 4, and a limiting rod is fixed between the opposite sides of the upper and lower support blocks. Limiting sleeves are fixed on the left and right sides of the movable plate 502. The limiting sleeves make linear movements up and down on the outer surface of the limiting rod, which can limit the movement of the movable plate 502.

[0030] The working principle of the above embodiment is:

[0031] (1) When fixing the fingerprint chip, first place the chip to be tested in the inner cavity of the groove, then start the driving motor 302, the output shaft of the driving motor 302 rotates and drives the No. 1 sprocket 303 to rotate, the rotation of the No. 1 sprocket 303 can move the chain 306, the movement of the chain 306 causes the No. 2 sprocket 305 to rotate, the rotation of the No. 2 sprocket 305 causes the bidirectional screw 304 to rotate, the rotation of the bidirectional screw 304 causes the two screw sleeves 307 threadedly connected on its surface to move relative to each other, when the screw sleeve 307 moves, the slider fixed on its lower surface moves in the inner cavity of the slider, which can limit the movement of the screw sleeve 307 and make it move linearly, the movement of the screw sleeve 307 causes the clamping plate 308 to move, at this time, the two clamping plates 308 make relative movement until the two clamping plates 308 locate the position of the chip to be tested to prevent it from shaking.

[0032] (2) When testing the fingerprint chip, first start the two electric push rods 501. The output shafts of the two electric push rods 501 move downward, thereby driving the movable plate 502 to move downward. When the movable plate 502 moves, the limit sleeves fixed on both sides slide downward on the outer surface of the limit rod, thereby limiting the movement of the movable plate 502. The movement of the movable plate 502 can drive the pressing block 503 to move, thereby applying pressure to the chip to be tested. The movement of the movable plate 502 drives the squeezing plate 504 to move, and the squeezing plate 504 can squeeze the mounting block, so that the force applied to the chip to be tested can be sensed by the pressure sensor.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A fingerprint chip detection device with controllable applied pressure, comprising a support platform (1), characterized in that: A workbench (2) is fixed in the middle of the upper surface of the support platform (1), a fixing mechanism (3) for fixing chips of different sizes is provided at the right end of the lower surface of the support platform (1), a mounting frame (4) is fixed on the upper surface of the support platform (1), and a detection mechanism (5) for applying different pressures is provided in the middle of the inner top wall of the mounting frame (4); The fixing mechanism (3) comprises a protection box (301) fixed to the right end of the lower surface of the support platform (1); a driving motor (302) is fixed to the inner cavity of the protection box (301); an output shaft of the driving motor (302) passes through the right side wall of the inner cavity of the protection box (301) and extends to the right side of the protection box (301) and is fixed with a first sprocket (303); a bidirectional screw (304) is rotatably connected between the left and right side walls of the inner cavity of the workbench (2) via a bearing; A second sprocket (305) is fixed to the right end of the outer surface of the bidirectional screw (304); the outer surfaces of the first sprocket (303) and the second sprocket (305) are meshed and connected with a same chain (306); the left and right ends of the outer surface of the bidirectional screw (304) are both threadedly connected with a screw sleeve (307); a clamping plate (308) is fixed to the upper surface of the screw sleeve (307); and the upper surface of the clamping plate (308) passes through the workbench (2) and extends to the top of the workbench (2).

2. The fingerprint chip detection device with controllable applied pressure according to claim 1, characterized in that: A groove is provided in the middle of the upper surface of the workbench (2), and mounting blocks are fixed to both left and right ends of the upper surface of the workbench (2), and a pressure sensor is fixed to the inner cavity of the mounting block.

3. The fingerprint chip detection device with controllable applied pressure according to claim 1, characterized in that: A through hole is provided at the right end of the inner bottom wall of the workbench (2), and the size of the inner cavity of the through hole is compatible with the size of the chain (306).

4. The fingerprint chip detection device with controllable applied pressure according to claim 1, characterized in that: The two screw sleeves (307) are symmetrically distributed at the left and right ends of the vertical center axis of the bidirectional screw (304), a slider is fixed on the lower surface of the screw sleeve (307), a slide bar is fixed on the inner bottom wall of the workbench (2), and the slider performs horizontal linear motion in the inner cavity of the slide bar.

5. The fingerprint chip detection device with controllable applied pressure according to claim 2, characterized in that: A guide hole is provided on the inner bottom wall of the groove, and the bottom of the clamping plate (308) performs horizontal linear motion in the inner cavity of the guide hole. Anti-skid pads are fixed on opposite sides of the two clamping plates (308), and the anti-skid pads are rubber pads.

6. The fingerprint chip detection device with controllable applied pressure according to claim 1, characterized in that: The detection mechanism (5) comprises electric push rods (501) fixed to the left and right ends of the inner top wall of the mounting frame (4); the output shafts of the two electric push rods (501) are fixed to the same movable plate (502); a pressing block (503) is fixed to the middle of the lower surface of the movable plate (502); and extrusion plates (504) are fixed to the left and right ends of the lower surface of the movable plate (502).

7. The fingerprint chip detection device with controllable applied pressure according to claim 6, characterized in that: Support blocks are fixed at the upper and lower ends of the opposite sides of the left and right side walls of the inner cavity of the mounting frame (4), and a limiting rod is fixed between the opposite sides of the upper and lower support blocks. Limiting sleeves are fixed on the left and right sides of the movable plate (502), and the limiting sleeves perform up and down linear motion on the outer surface of the limiting rod.

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