CN211717327U - Key module detection device - Google Patents
Key module detection device Download PDFInfo
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- CN211717327U CN211717327U CN202020300571.8U CN202020300571U CN211717327U CN 211717327 U CN211717327 U CN 211717327U CN 202020300571 U CN202020300571 U CN 202020300571U CN 211717327 U CN211717327 U CN 211717327U
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Abstract
The utility model relates to a button module detection device, this button module detection device are used for detecting the button module, include: the first jig is provided with a first surface, a second surface and a lateral peripheral surface, the first surface and the second surface are arranged in a reverse mode, the lateral peripheral surface is connected with the first surface and the second surface, and a notch communicated with the first surface and the second surface is formed in the edge of the first jig; the second jig is connected with the first surface and extends to the opening of the notch, and a detection hole is formed in the part, located at the opening of the notch, of the second jig along the direction from the first surface to the second surface; and the third jig is provided with a bearing surface which is contacted with the second surface, the bearing surface is used for bearing the reinforcing plate and enabling the key module to be positioned in the notch, and when the key module is positioned in the notch and abutted against the side periphery, the second jig is used for detecting whether the contact of the key switch is exposed out of the detection hole or not. Utilize the utility model discloses detection device detects the button module, and the reducible cost that detects improves detection efficiency.
Description
Technical Field
The utility model relates to a button detects technical field, especially relates to a button module detection device.
Background
In the related art, the key module includes a flexible circuit board, a reinforcing plate, and a key switch. In the key module manufacturing process, the flexible circuit board and the reinforcing plate are stacked, and then the key switch is attached to one side, away from the reinforcing plate, of the flexible circuit board through an SMT (surface mounting technology) process, and the edge of the flexible circuit board can be extended out of the reinforcing plate, so that the flexible circuit board is reinforced better. In order to meet the mounting precision or the processing requirement of the key switch, after the key module is manufactured, the distance between the contact of the key switch and the edge of the reinforcing plate needs to be detected. However, the conventional detection method is to directly detect through a caliper, which results in excessively high detection cost and low detection efficiency.
SUMMERY OF THE UTILITY MODEL
Accordingly, it is necessary to provide a key module detection device for detecting the distance between the contact of the key switch and the edge of the reinforcing plate, which results in high detection cost and low detection efficiency.
The utility model provides a button module detection device, the button module includes flexible circuit board, stiffening plate and key switch, key switch the flexible circuit board the stiffening plate is in range upon range of the setting in proper order in the thickness direction of flexible circuit board, detection device includes:
the first jig is provided with a first surface, a second surface and a lateral peripheral surface, the first surface and the second surface are arranged in a reverse mode, the lateral peripheral surface is connected with the first surface and the second surface, and a notch communicated with the first surface and the second surface is formed in the edge of the first jig;
the second jig is connected with the first surface and extends to the opening of the notch, and a detection hole is formed in the part, located at the opening of the notch, of the second jig along the direction from the first surface to the second surface; and
the third jig is provided with a bearing surface which is in contact with the second surface, and the bearing surface is used for bearing the reinforcing plate so that the contact of the key switch faces one side of the detection hole, and the key module is positioned in the notch and can be abutted against the lateral periphery; when the key module is located in the notch and abutted against the side periphery, the second jig is used for detecting whether the contact of the key switch is exposed out of the detection hole.
When the detection device is used for detecting the key module, the key module can be arranged between the second jig and the bearing surface and is abutted against the lateral periphery surface, so that the reinforcing plate is borne on the bearing surface, and meanwhile, the contact of the key switch faces to one side of the detection hole. The installation position of the second jig and the distance between the center of the detection hole and the side periphery face can be designed according to a qualified key module, if the key module is qualified, after the key module is located in the notch and abutted against the side periphery face for limiting, the contact of the key switch is just exposed in the detection hole, namely located in the range of the detection hole, and the distance between the contact of the key switch and the edge of the reinforcing plate meets the design requirement. If the key module is unqualified, when the key module is positioned in the notch and abutted against the side peripheral surface for limiting, the contact of the key switch is not in the range of the detection hole, and the distance between the contact of the key switch and the edge of the reinforcing plate does not meet the design requirement. Therefore, the detection device is used for detecting the key module, so that the detection cost can be reduced, and the detection efficiency is improved.
In one embodiment, the third fixture includes a body and a bearing block protruding from the body, the bearing surfaces include a first bearing surface and a second bearing surface, a portion of the surface of the body facing the first fixture, which is not covered by the bearing block, is a first bearing surface, a portion of the surface of the bearing block facing the second fixture is a second bearing surface, the first bearing surface contacts with the second surface, the bearing block is received in the notch and connected to the side circumferential surface, and the second bearing surface is used for bearing the stiffener. Therefore, the stability of the first jig and the third jig after matching can be improved, and the precision of the key module in detection is guaranteed.
In one embodiment, the second carrying surface is provided with a first groove, and the first groove is used for accommodating the reinforcing plate when the key module abuts against the side periphery at the notch, so that the flexible circuit board is attached to the second carrying surface. With the arrangement, the height of the key module arranged behind the notch (namely, the spacing distance between the key module and the second jig is increased) can be reduced, and the thickness of the first jig can be thinner as long as the key module can be arranged between the second jig and the bearing surface.
In one embodiment, the second jig comprises a plurality of detection blocks arranged at intervals, and the detection holes are formed in the detection blocks. Therefore, the key module with the plurality of key switches can be detected.
In one embodiment, the detection block includes a supporting portion and a bending portion, the supporting portion is disposed on the first surface adjacent to the notch, the bending portion is connected to a side of the supporting portion away from the first surface and bends toward the notch, and the detection hole is opened in the bending portion. Thus, when the thickness of the key module is thick, the bending part can be lifted by the supporting part, so that the key module can be arranged between the bending part and the bearing surface.
In one embodiment, the supporting portion is detachably connected to the first fixture. Therefore, for the key modules with different heights, the supporting part is detachably connected with the first jig, and the detection blocks with different sizes can be conveniently replaced (for example, the height of the supporting part relative to the first surface is changed), so that the key modules can be arranged between the second jig and the bearing surface without changing the thickness of the first jig, and the device cost is saved.
In one embodiment, at least one of the part of the side peripheral surface located in the notch and the supporting part is provided with a buffer pad, and the buffer pad is used for buffering the impact of the reinforcing plate when the key module abuts against the side peripheral surface at the notch. Thus, the damage of the reinforcing plate due to impact can be reduced.
In one embodiment, the key module detection device includes a camera, the camera is disposed on a side of the first surface away from the second surface, and the camera is used for acquiring an image in the detection hole from the side of the first surface. Therefore, whether the contact of the key switch is in the range of the detection hole can be clearly judged by the image shot by the camera.
In one embodiment, the third fixture includes a lubricating layer formed on the bearing surface to reduce a frictional resistance between the bearing surface and the stiffener when the stiffener is borne on the bearing surface.
In one embodiment, the first fixture is a plastic member including teflon. So, including the plastic part of teflon can satisfy roughness and smoothness ability, play the guard action to the stiffening plate.
In one embodiment, the third jig is a metal piece to meet the requirement of machining precision.
Drawings
Fig. 1 is a schematic structural diagram of a key module according to an embodiment of the present application;
FIG. 2 is a schematic view of another view angle of the key module shown in FIG. 1;
FIG. 3 is a partially enlarged view of a key switch area of the key module shown in FIG. 1;
FIG. 4 is a schematic structural diagram illustrating a detection apparatus according to an embodiment of the present invention for detecting the key module shown in FIG. 1;
FIG. 5 is a top view of the detecting device and the key module shown in FIG. 4 after assembly;
FIG. 6 is a cross-sectional view taken along line II-II in FIG. 5.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present application provides a key module 10. The key module 10 includes a flexible circuit board 100, a stiffener 200, and a key switch 300. The key switch 300, the flexible circuit board 100, and the reinforcing plate 200 are stacked in this order in the thickness direction of the flexible circuit board 100. The key switches 300 have contacts 310 for being pressed by fingers of a user to activate key functions, the number of the key switches 300 may be one or more, and when the number of the key switches 300 is more, two adjacent key switches 300 are arranged at intervals. Fig. 1 illustrates that the number of the key switches 300 is two, for example, when the key module 10 is applied to a mobile terminal such as a smart phone, the two key switches 300 can be respectively used as volume up-down keys. The reinforcing plate 200 is used to reinforce the region of the flexible circuit board 100 where the key switch 300 is disposed.
In an embodiment, referring to fig. 1 and fig. 2, the key module 10 may further have a fingerprint identification function, and the key module 10 further includes a chip package structure 400 and a dome switch 500 spaced apart from the key switch 300. The chip packaging structure 400, the flexible circuit board 100 and the dome switch 500 are sequentially stacked in the thickness direction of the flexible circuit board 100, and the chip packaging structure 400 and the key switch 300 are disposed on the same side of the flexible circuit board 100. The chip package structure 400 includes a fingerprint sensor (not shown) to complete fingerprint recognition and signal conversion, and the specific type of the fingerprint sensor is not limited, and those skilled in the art can flexibly select the fingerprint sensor according to actual situations, for example, the fingerprint sensor may be a push type capacitive sensor. The specific type of the chip package structure 400 is not limited, for example, the chip package structure 400 may be packaged by Ball Grid Array (BGA) or grid array (BGA) technologies. When fingerprint identification is performed, dome switch 500 can receive the force applied by the user finger on chip package structure 400, dome switch 500 deforms by pressing, dome switch 500 provides tactile feedback to the user by means of the force deformation characteristic, and dome switch 500 deforms by pressing, so that dome switch 500 can be electrically connected to a circuit board (for example, a circuit board of a mobile terminal) arranged opposite to dome switch 500 through contact 510 of dome switch 500.
For the key module 10 of each embodiment of the present application, in order to implement the key function of the key module 10, in the manufacturing process of the key module 10, the flexible circuit board 100 and the reinforcing plate 200 are stacked, and then the key switch 300 is attached to one side of the flexible circuit board 100 away from the reinforcing plate 200 through the SMT process, and the reinforcing plate 200 generally extends out of the edge of the flexible circuit board 100, so as to better reinforce the flexible circuit board 100. In order to meet the mounting accuracy or the processing requirement of the key switch 300, after the key module 10 is manufactured, as shown in fig. 3, the distances d1 and d2 between the contact 310 of the key switch 300 and the edge of the reinforcing plate 200 need to be detected to determine whether the mounting position of the key switch 300 on the flexible circuit board 100 meets the qualified requirement. However, the conventional detection method has high detection cost and low detection efficiency.
Referring to fig. 4, an embodiment of the present application provides a key module detecting device 20, configured to detect the key module 10 of the above embodiments, so as to quickly detect whether the distances d1 and d2 between the contact 310 of the key switch 300 and the edge of the reinforcing plate 200 meet design requirements, that is, whether the installation position of the key switch 300 on the flexible circuit board 100 meets acceptable requirements. In an embodiment, the key module detecting device 20 includes a first fixture 600, a second fixture 700, and a third fixture 800.
The first fixture 600 has a first surface 610, a second surface 620 and a side circumferential surface 630 opposite to each other. The first surface 610 and the second surface 620 are disposed opposite to each other, for example, the first surface 610 and the second surface 620 may be disposed opposite to each other in a thickness direction of the first fixture 600. The lateral periphery 630 connects the first surface 610 and the second surface 620. The edge of the first fixture 600 forms an indentation 631 that connects the first surface 610 and the second surface 620. In one embodiment, the first fixture 600 is a metal member to meet the processing accuracy of the processed notch 631. On the premise of not considering the processing precision, the first fixture 600 may not be a metal part, such as a plastic part.
The second fixture 700 is connected to the first surface 610 and extends to the opening of the notch 631, and a portion of the second fixture 700 located at the opening of the notch 631 is provided with a detection hole 701 along a direction from the first surface 610 to the second surface 620. In an embodiment, the second fixture 700 includes a plurality of detection blocks 710 arranged at intervals, and the detection holes 701 are opened in the detection blocks 710. Of course, in other embodiments, the number of detection blocks 710 may be only one. The number of the detecting blocks 710 should correspond to the number of the key switches 300 in the key module 10 to be detected, and when the number of the detecting blocks 710 is multiple, the distance between the centers of the detecting holes 701 in two adjacent detecting blocks 710 should be equal to the distance between the centers of two adjacent key contacts 310 in the key module 10 to be detected.
The third fixture 800 has a bearing surface 810 connected to the second surface 620, and the bearing surface 810 is used for bearing the reinforcing plate 200, so that the contact 310 of the key switch 300 faces the side of the detecting hole 701, and the key module 10 is located in the notch 631 and can abut against the side peripheral surface 630. When the key module 10 is located in the notch 631 and abuts against the side peripheral surface 630, the second fixture 700 is used to detect whether the contact 310 of the key switch 300 is exposed out of the detection hole 701. The third fixture 800 is detachably connected to the first fixture 600 so as to facilitate the molding of the key module detecting device 20, and the third fixture 800 may also be integrally formed with the first fixture 600. In an embodiment, the third fixture 800 includes a lubricating layer (not shown) formed on the supporting surface 810, so as to reduce the frictional resistance between the stiffener 200 and the supporting surface 810 when the key module 10 is disposed between the second fixture 700 and the supporting surface 810, and prevent the stiffener 200 from being worn by the supporting surface 810. In an embodiment, the third fixture 800 is a plastic member including teflon, which has better flatness and smoothness, so as to protect the stiffener 200, and at this time, the bearing surface 810 does not need to be provided with a lubricating layer.
Referring to fig. 5 and 6, when the key module 10 is detected by the detecting device 20, the key module 10 is disposed between the second fixture 700 and the carrying surface 810 and abuts against the side peripheral surface 630, so that the reinforcing plate 200 is carried on the carrying surface 810, and the contact 310 of the key switch 300 faces the side of the detecting hole 701. The mounting position of the second fixture 700 and the distance between the center of the detection hole 701 and the side peripheral surface 630 can be designed according to the qualified key module 10, if the key module 10 is qualified, after the key module 10 is located in the notch 631 and abuts against the side peripheral surface 630 for limiting, the contact 310 of the key switch 300 is just exposed out of the detection hole 701, that is, located within the range of the detection hole 701, which indicates that the distances d1 and d2 between the contact 310 of the key switch 300 and the edge of the reinforcing plate 200 satisfy the design requirements. If the key module 10 is not qualified, after the key module 10 is located in the notch 631 and abuts against the side peripheral surface 630 for limiting, the contact 310 of the key switch 300 is not located within the range of the detection hole 701, which indicates that the distances d1 and d2 between the contact 310 of the key switch 300 and the edge of the reinforcing plate 200 do not meet the design requirement. Therefore, when the key module 10 is detected by the detection device 20, the detection cost can be reduced and the detection efficiency can be improved.
In an embodiment, referring to fig. 4, the third fixture 800 includes a body 820 and a bearing block 830 protruding from the body 820, the bearing surface 810 includes a first bearing surface 811 and a second bearing surface 812, a portion of the surface of the body 820 facing the first fixture 600, which is not covered by the bearing block 830, is the first bearing surface 811, a portion of the surface of the bearing block 830 facing the second fixture 700 is the second bearing surface 812, the first bearing surface 811 and the second 620 contact the bearing block 830 and are accommodated in the notch 631 and contact the lateral surface 630, and the second bearing surface 812 is used for bearing the stiffener 200. Because the bearing block 830 is accommodated in the notch 631, the first fixture 600 and the third fixture 800 can be conveniently positioned and assembled, the stability of the first fixture 600 and the third fixture 800 after assembly can be increased, and the detection accuracy of the key module 10 can be ensured.
In an embodiment, the second supporting surface 812 is formed with a first groove 831 and a second groove 832, when the key module 10 is disposed between the detecting block 710 and the supporting surface 810, the first groove 831 and the second groove 832 can respectively avoid the stiffener 200 and the dome switch 500, that is, the stiffener 200 is accommodated in the first groove 831, and the dome switch 500 is accommodated in the second groove 832, at this time, the flexible circuit board 100 can be attached to the second supporting surface 812. With such an arrangement, the height of the key module 10 relative to the second carrying surface 812 after being disposed in the notch 631 can be reduced, that is, the distance between the key module 10 and the second fixture 700 is lengthened, and it is only necessary to ensure that the key module 10 can be disposed between the second fixture 700 and the second carrying surface 812, and the thickness of the first fixture 600 can be made thinner at this time, so as to reduce the distance between the key module 10 and the second fixture 700.
In an embodiment, the detecting block 710 includes a supporting portion 711 and a bending portion 712, the supporting portion 711 is disposed on the first surface 610 adjacent to the notch 631, the bending portion 712 is connected to a side of the supporting portion 711 away from the first surface 610 and bends toward the notch 631, and the detecting hole 701 is opened on the bending portion 712. Thus, when the key module 10 is thick, the supporting portion 711 can raise the bent portion 712, so that the key module 10 can be disposed between the bent portion 712 and the supporting surface 810. In an embodiment, the supporting portion 711 is detachably connected to the first fixture 600, so as to facilitate maintenance and replacement, and meanwhile, for the key module 10 with different heights, the supporting portion 711 is detachably connected to the first fixture 600, so as to facilitate replacement of the detecting blocks 710 with different sizes, for example, the height of the supporting portion 711 relative to the first surface 610 is changed, so that the key module 10 can be disposed between the second fixture 700 and the carrying surface without changing the thickness of the first fixture 700, thereby saving the device cost. Of course, in other embodiments, the supporting portion 711 and the first fixture 700 may be formed as an integral structure.
In an embodiment, at least one of the portion of the side peripheral surface 630 located at the notch 631 and the supporting portion 711 is provided with a buffer pad (not shown), and the buffer pad is used for buffering the impact of the reinforcement plate 200 when the key module 10 abuts against the side peripheral surface 630 at the notch 631. The cushioning pad may be, for example, an elastic pad, such as a silicone pad or a rubber pad.
In an embodiment, the key module detecting device 20 includes a camera (not shown) disposed on a side of the first surface 610 away from the second surface 620, and the camera is configured to capture an image in the detecting hole 701 from the side of the first surface 610. In the detection process, whether the contact 310 of the key switch 300 is in the range of the detection hole 701 can be clearly judged through the camera. When a plurality of key switches 300 are to be detected, the number of the detection blocks 710 corresponds to that of the key switches, and the camera can simultaneously acquire images in a plurality of detection holes 701, and since the distance between two adjacent detection holes 701 is equal to that of two adjacent key contacts 310, the plurality of key switches 300 can be simultaneously detected during detection.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a button module detection device, the button module includes flexible circuit board, stiffening plate and key switch, key switch the flexible circuit board the stiffening plate is in range upon range of setting gradually in the thickness direction of flexible circuit board, its characterized in that, detection device includes:
the first jig is provided with a first surface, a second surface and a lateral peripheral surface, the first surface and the second surface are arranged in a reverse mode, the lateral peripheral surface is connected with the first surface and the second surface, and a notch communicated with the first surface and the second surface is formed in the edge of the first jig;
the second jig is connected with the first surface and extends to the opening of the notch, and a detection hole is formed in the part, located at the opening of the notch, of the second jig along the direction from the first surface to the second surface; and
the third jig is provided with a bearing surface which is in contact with the second surface, and the bearing surface is used for bearing the reinforcing plate so that the contact of the key switch faces one side of the detection hole, and the key module is positioned in the notch and can be abutted against the lateral periphery; when the key module is located in the notch and abutted against the side periphery, the second jig is used for detecting whether the contact of the key switch is exposed out of the detection hole.
2. The key module detecting device of claim 1, wherein the third fixture includes a body and a bearing block protruding from the body, the bearing surfaces include a first bearing surface and a second bearing surface, a portion of the surface of the body facing the first fixture, which is not covered by the bearing block, is the first bearing surface, a portion of the surface of the bearing block facing the second fixture is the second bearing surface, the first bearing surface contacts with the second surface, the bearing block is received in the notch and contacts with the side peripheral surface, and the second bearing surface is used for bearing the stiffener.
3. The apparatus according to claim 2, wherein the second carrying surface has a first groove, and the first groove is used for receiving the stiffener when the key module abuts against the side periphery at the notch, so that the flexible circuit board is attached to the second carrying surface.
4. The key module detecting device of claim 1, wherein the second fixture comprises a plurality of detecting blocks arranged at intervals, and the detecting holes are formed in the detecting blocks.
5. The key module detecting device of claim 4, wherein the detecting block includes a supporting portion and a bending portion, the supporting portion is disposed on the first surface adjacent to the notch, the bending portion is connected to a side of the supporting portion away from the first surface and bends toward the notch, and the detecting hole is disposed on the bending portion.
6. The key module detecting device of claim 5, wherein the supporting portion is detachably connected to the first fixture.
7. The key module detecting device of claim 5, wherein at least one of the supporting portion and the portion of the side surface located in the notch is provided with a cushion pad for buffering the impact of the reinforcing plate when the key module abuts against the side surface at the notch.
8. The key module detection device according to claim 1, wherein the key module detection device comprises a camera, the camera is disposed on a side of the first surface away from the second surface, and the camera is used for obtaining an image in the detection hole from the side of the first surface.
9. The apparatus according to claim 1, wherein the third fixture includes a lubricant layer formed on the supporting surface to reduce a frictional resistance between the supporting surface and the stiffener when the stiffener is supported on the supporting surface.
10. The key module detecting device of claim 1, wherein the first fixture is a plastic part comprising teflon; and/or the third jig is a metal piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020300571.8U CN211717327U (en) | 2020-03-12 | 2020-03-12 | Key module detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020300571.8U CN211717327U (en) | 2020-03-12 | 2020-03-12 | Key module detection device |
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| CN211717327U true CN211717327U (en) | 2020-10-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730250A (en) * | 2020-12-29 | 2021-04-30 | 业成科技（成都）有限公司 | Detection jig and detection method |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730250A (en) * | 2020-12-29 | 2021-04-30 | 业成科技（成都）有限公司 | Detection jig and detection method |
| CN112730250B (en) * | 2020-12-29 | 2023-08-25 | 业成科技（成都）有限公司 | Detection jig and detection method |
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Address after: 330096 No.699 Tianxiang North Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee after: Jiangxi OMS Microelectronics Co.,Ltd. Address before: 330000 east of Xueyuan 6th Road, south of Tianxiang Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee before: OFilm Microelectronics Technology Co.,Ltd. Address after: 330000 east of Xueyuan 6th Road, south of Tianxiang Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee after: OFilm Microelectronics Technology Co.,Ltd. Address before: 330029 No. 1189 Jingdong Avenue, Nanchang high tech Zone, Jiangxi Patentee before: NANCHANG OFILM BIO-IDENTIFICATION TECHNOLOGY Co.,Ltd. |
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