CN106778483B - Biological recognition module with key function and manufacturing method thereof - Google Patents
Biological recognition module with key function and manufacturing method thereof Download PDFInfo
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- CN106778483B CN106778483B CN201611030358.4A CN201611030358A CN106778483B CN 106778483 B CN106778483 B CN 106778483B CN 201611030358 A CN201611030358 A CN 201611030358A CN 106778483 B CN106778483 B CN 106778483B
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- reinforcing plate
- circuit board
- metal ring
- flexible circuit
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
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- General Physics & Mathematics (AREA)
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- Theoretical Computer Science (AREA)
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Abstract
The utility model provides a take biological identification module of button function, includes apron, chip, flexible circuit board, first stiffening plate and the second stiffening plate that from top to bottom set gradually, the periphery of apron and chip is equipped with the metal ring, flexible circuit board is crooked under the second stiffening plate, the below of flexible circuit board under the second stiffening plate is equipped with key switch, its characterized in that: the metal ring, the first reinforcing plate and the second reinforcing plate are partially welded together, so that the metal ring is tightly connected with the first reinforcing plate, and the first reinforcing plate is tightly connected with the second reinforcing plate. The biological identification module with the key function is reliable in connection, reduced in thickness, prevented from position deviation and simplified in production process. In addition, the manufacturing method of the biological recognition module with the key function is simple in process and convenient to weld.
Description
Technical Field
The invention relates to the technical field of touch control, in particular to a biological identification module with a key function and a manufacturing method thereof.
Background
Along with the development of fingerprint identification technology, fingerprint identification functions have been widely applied to various electronic products. Especially, mobile phones with extremely wide popularity, the demand for installing a biometric module on the front of the mobile phone is increasing. The structure of the conventional biological recognition module with a key function is shown in fig. 1, and the conventional biological recognition module comprises a cover plate 1a, a chip 2a, a flexible circuit board 4a, a first reinforcing plate 5a and a second reinforcing plate 6a which are sequentially arranged from top to bottom, wherein a metal ring 3a is arranged at the periphery of the cover plate 1a and the chip 2a, the flexible circuit board 4a is bent below the second reinforcing plate 6a, a key switch 7a is arranged below the flexible circuit board 4a below the second reinforcing plate 6a, the metal ring 3a is connected with the first reinforcing plate 5a and the flexible circuit board 4a by adopting a first bonding layer 8a, the metal ring 3a is also connected with the flexible circuit board 4a by silver colloid, the first reinforcing plate 5a is connected with the second reinforcing plate 6a by adopting a second bonding layer 9a, but the first reinforcing plate 5a is not connected with the second reinforcing plate 6a, and the second reinforcing plate 6a is connected with the flexible circuit board 4a by adopting a third bonding layer 10a and a fourth bonding layer 11a respectively.
However, the existing biometric module has the following technical problems: 1. the metal ring 3a is connected with the first reinforcing plate 5a and the flexible circuit board 4a by adopting a first adhesive layer 8a, so that the risk of falling off exists, and the first adhesive layer 8a has a certain thickness; 2. the metal ring 3a and the flexible circuit board 4a are conducted through silver colloid, the conductivity is poor, surface treatment such as nickel plating is needed to be carried out on the bottom surface of the metal ring 3a, and in addition, the silver colloid is easy to corrode and oxidize; 3. the first reinforcing plate 5a and the second reinforcing plate 6a are connected by adopting a second bonding layer 9a, the risk of falling off exists, and the second bonding layer 9a has a certain thickness; 4. the first reinforcing plate 5a and the second reinforcing plate 6a are connected by adopting a second bonding layer 9a, and in the use of the product, the relative positions of the first reinforcing plate 5a and the second reinforcing plate 6a deviate due to clicking, so that the use experience is affected; 5. the first reinforcing plate 5a and the second reinforcing plate 6a are not conducted, and the conductivity is limited; 6. the metal ring 3a, the first reinforcing plate 5a, the second reinforcing plate 6a and the flexible circuit board 4a are connected by adopting adhesives respectively, and the production process is complicated.
Disclosure of Invention
The invention aims to solve the technical problems that: a biometric module with a key function is provided which is reliable in connection, reduced in thickness, prevented from positional displacement, and simplified in production process.
The technical scheme of the invention is as follows: the utility model provides a take biological identification module of button function, includes apron, chip, flexible circuit board, first stiffening plate and the second stiffening plate that from top to bottom set gradually, the periphery of apron and chip is equipped with the metal ring, flexible circuit board is crooked under the second stiffening plate, the below of flexible circuit board under the second stiffening plate is equipped with key switch, its characterized in that: the metal ring, the first reinforcing plate and the second reinforcing plate are partially welded together, so that the metal ring is tightly connected with the first reinforcing plate, and the first reinforcing plate is tightly connected with the second reinforcing plate.
After the structure is adopted, the invention has the following advantages:
the biological recognition module with the key function of the invention partially welds the metal ring, the first reinforcing plate and the second reinforcing plate together, has better connection firmness and is not easy to fall off, saves the thickness space of the adhesive between the metal ring and the first reinforcing plate and between the first reinforcing plate and the flexible circuit board and between the first reinforcing plate and the second reinforcing plate, and ensures that the thickness of the product is thinner; the first reinforcing sheet and the second reinforcing sheet are welded into a whole, so that the phenomenon of position deviation is not easy to occur; the metal ring, the first reinforcing plate and the second reinforcing plate are welded simultaneously, so that the production process is fewer, and the production cost is low.
Preferably, at least two welding points are arranged on the metal ring, the first reinforcing plate and the second reinforcing plate. The arrangement ensures that the welding is more reliable, the fixing is firmer and the conductivity is better.
Preferably, the first reinforcing plate and the second reinforcing plate are connected and conducted with the flexible circuit board through the conductive adhesive layer. The arrangement not only can lead the metal ring to be well conducted with the flexible circuit board through the first reinforcing plate and the conductive adhesive layer, but also can lead the metal ring to be better in conductivity through the welding point, does not need surface treatment such as nickel plating and the like on the bottom surface of the metal ring, and is not easy to be corroded and oxidized; in addition, the metal ring, the first reinforcing plate, the second reinforcing plate and the flexible circuit board form a plurality of conducting paths through the welding points and the conductive adhesive layer, and electrostatic conduction is facilitated.
Preferably, the conductive adhesive layer covers the flexible circuit board at the flexible position. The conductive adhesive layer covers the bending position of the flexible circuit board and can be used as an anti-bending layer for preventing the flexible circuit board from being folded and hurt the flexible circuit board.
Preferably, the metal ring, the first reinforcing plate and the second reinforcing plate are made of stainless steel materials. Stainless steel is firm and durable, is not easy to oxidize and corrode, and has the same material as the stainless steel, thereby being beneficial to the stability of welding.
Preferably, the cover plate is made of any one of sapphire, ceramic, glass or a coating. Sapphire, ceramics and glass are firm and durable, and the coating is light in weight, strong in adhesive force, firm in adhesion, low in cost and rich in color selection.
Preferably, the key switch is a welded type touch switch or an adhesive type touch switch. The welded type touch switch or the adhesive type touch switch can be conveniently arranged on the flexible circuit board.
The invention aims to solve the other technical problems that: the manufacturing method of the biological recognition module with the key function is simple in process and convenient to weld.
The technical scheme of the invention is as follows: a manufacturing method of a biological identification module with a key function is characterized by comprising the following steps: it comprises the following steps:
(1) Connecting the first reinforcing plate and the second reinforcing plate with one side of the flexible circuit board through a conductive adhesive layer;
(2) The chip and the key switch are welded on the other surface of the flexible circuit board through soldering tin;
(3) Connecting the cover plate with the chip;
(4) Placing a metal ring in a lower die, placing a cover plate and a chip in the metal ring, bending a flexible circuit board, and tightly attaching a first reinforcing plate and a second reinforcing plate;
(5) The metal ring, the first reinforcing plate and the second reinforcing plate are tightly pressed by the upper die and the lower die, and are welded through the through holes arranged on the upper die, so that the metal ring, the first reinforcing plate and the second reinforcing plate are locally welded together.
After the method is adopted, the invention has the following advantages:
the manufacturing method of the biological recognition module with the key function comprises the steps of firstly connecting a chip, a key switch, a first reinforcing plate and a second reinforcing plate with a flexible circuit board, connecting a cover plate with the chip, then bending the flexible circuit board to enable the first reinforcing plate and the second reinforcing plate to be pressed and attached, pressing and attaching a metal ring, the first reinforcing plate and the second reinforcing plate by using an upper die and a lower die, and fixing the metal ring, the first reinforcing plate and the second reinforcing plate together by welding.
Preferably, the step (5) adopts laser welding, and the metal ring, the first reinforcing plate and the second reinforcing plate are partially melted by laser along the laser direction through the through hole on the upper die, and the molten solutions of the metal ring, the first reinforcing plate and the second reinforcing plate are mixed and are connected after solidification. The laser welding is implemented efficiently, conveniently and reliably.
Description of the drawings:
FIG. 1 is a schematic diagram of a conventional biometric module with key function;
FIG. 2 is a schematic diagram of a biometric module with key function according to the present invention;
fig. 3 and fig. 4 are schematic diagrams illustrating the processing steps of the biometric module with key function according to the present invention;
in the prior art diagram: 1 a-cover plate, 2 a-chip, 3 a-metal ring, 4 a-flexible circuit board, 5 a-first reinforcing plate, 6 a-second reinforcing plate, 7 a-key switch, 8 a-first adhesive layer, 9 a-second adhesive layer, 10 a-third adhesive layer and 11 a-fourth adhesive layer.
In the drawings of the invention: the laser comprises a 1-cover plate, a 2-chip, a 3-metal ring, a 4-flexible circuit board, a 5-first reinforcing plate, a 6-second reinforcing plate, a 7-key switch, an 8-welding point, a 9-conductive adhesive layer, a 10-upper die, a 11-through hole, a 12-lower die and a 13-laser direction.
Detailed Description
The invention will be further described with reference to the accompanying drawings, in conjunction with examples.
Examples:
the utility model provides a take biological identification module of button function, includes apron 1, chip 2, flexible circuit board 4, first stiffening plate 5 and the second stiffening plate 6 that from top to bottom set gradually, the periphery of apron 1 and chip 2 is equipped with metal ring 3, flexible circuit board 4 is crooked under the second stiffening plate 6, the below of flexible circuit board 4 under the second stiffening plate 6 is equipped with key switch 7, metal ring 3, first stiffening plate 5 and the local welding of second stiffening plate 6 three together to make metal ring 3 and first stiffening plate 5 zonulae occludens, first stiffening plate 5 and second stiffening plate 6 zonulae occludens.
The metal ring 3, the first reinforcing plate 5 and the second reinforcing plate 6 are locally welded together by the biological identification module with the key function, so that the connection firmness is better, the metal ring is not easy to fall off, and the thickness space of an adhesive between the metal ring 3 and the first reinforcing plate 5 and the flexible circuit board 4 and between the first reinforcing plate 5 and the second reinforcing plate 6 is saved, so that the thickness of a product is thinner; the first reinforcing sheet 5 and the second reinforcing sheet 6 are welded into a whole, so that the phenomenon of position deviation is not easy to occur; the metal ring 3, the first reinforcing plate 5 and the second reinforcing plate 6 are welded at the same time, the production procedures are fewer, and the production cost is low.
Preferably, at least two welding points 8 are arranged on the metal ring 3, the first reinforcing plate 5 and the second reinforcing plate 6. The arrangement ensures that the welding is more reliable, the fixing is firmer and the conductivity is better.
Preferably, the first stiffening plate 5 and the second stiffening plate 6 are connected and conducted with the flexible circuit board 4 through the conductive adhesive layer 9. The arrangement not only can lead the metal ring 3 to be well conducted with the flexible circuit board 4 through the first reinforcing plate 5 and the conductive adhesive layer 9, but also can lead the metal ring to be better through the welding point 8, and the bottom surface of the metal ring 3 is not required to be subjected to surface treatment such as nickel plating and the like, and is not easy to be corroded and oxidized; in addition, the metal ring 3, the first reinforcing plate 5, the second reinforcing plate 6 and the flexible circuit board 4 form a plurality of conducting paths through the welding points 8 and the conductive adhesive layer 9, which is beneficial to electrostatic conduction.
Preferably, the conductive adhesive layer 9 covers the flexible circuit board 4 at a winding position. The conductive adhesive layer 9 covers the bending position of the flexible circuit board 4 and can be used as an anti-folding layer for preventing the flexible circuit board 4 from being folded and avoiding the flexible circuit board 4 from being folded.
Preferably, the metal ring 3, the first reinforcing plate 5 and the second reinforcing plate 6 are made of stainless steel materials. Stainless steel is firm and durable, is not easy to oxidize and corrode, and has the same material as the stainless steel, thereby being beneficial to the stability of welding.
Preferably, the cover plate 1 is made of any one of sapphire, ceramic, glass or a coating, and the coating may be a resin or ink coating. Sapphire, ceramics and glass are firm and durable, and the coating is light in weight, strong in adhesive force, firm in adhesion, low in cost and rich in color selection.
Preferably, the key switch 7 is a tact switch, such as a welded tact switch or an adhesive tact switch. The soldering type tact switch or the adhesive type tact switch can be conveniently mounted on the flexible circuit board 4.
The invention aims to solve the other technical problems that: the manufacturing method of the biological recognition module with the key function is simple in process and convenient to weld.
The technical scheme of the invention is as follows: a manufacturing method of a biological identification module with a key function is characterized by comprising the following steps: it comprises the following steps:
(1) The first reinforcing plate 5 and the second reinforcing plate 6 are connected with one surface of the flexible circuit board 4 through the conductive adhesive layer 9;
(2) The chip 2 and the key switch 7 are welded on the other surface of the flexible circuit board 4 through soldering tin;
(3) Connecting the cover plate 1 with the chip 2;
(4) Placing the metal ring 3 in the lower die 12, placing the cover plate 1 and the chip 2 in the metal ring 3, and winding the flexible circuit board 4 to enable the first reinforcing plate 5 and the second reinforcing plate 6 to be tightly attached;
(5) The metal ring 3, the first reinforcing plate 5 and the second reinforcing plate 6 are tightly pressed by using the upper die 10 and the lower die 12, and are welded through the through holes 11 arranged on the upper die 10, so that the metal ring 3, the first reinforcing plate 5 and the second reinforcing plate 6 are partially welded together.
The invention relates to a manufacturing method of a biological recognition module with a key function, which comprises the steps of firstly connecting a chip 2, a key switch 7, a first reinforcing plate 5 and a second reinforcing plate 6 with a flexible circuit board 4, connecting a cover plate 1 with the chip 2, then bending the flexible circuit board 4 to tightly press and attach the first reinforcing plate 5 and the second reinforcing plate 6, tightly pressing and attach a metal ring 3, the first reinforcing plate 5 and the second reinforcing plate 6 by using an upper die 10 and a lower die 12, and fixing the metal ring 3, the first reinforcing plate 5 and the second reinforcing plate 6 together by welding.
Preferably, in the step (5), laser welding is adopted, through the through hole 11 on the upper die 10, the metal ring 3, the first reinforcing plate 5 and the second reinforcing plate 6 are partially melted by laser along the laser direction 13, and the melted solutions of the three are mixed and are connected after solidification. The laser welding is implemented efficiently, conveniently and reliably.
Claims (9)
1. A manufacturing method of a biological recognition module with a key function is characterized by comprising the following steps:
(1) The first reinforcing plate and the second reinforcing plate are connected with one side of the flexible circuit board through the conductive adhesive layer;
secondly, welding the chip, the key switch and the like on the other surface of the flexible circuit board through soldering tin;
connecting the cover plate with the chip;
placing a metal ring in a lower die (12), placing a cover plate and a chip in the metal ring, and winding a flexible circuit board (4) and tightly attaching a first reinforcing plate (5) and a second reinforcing plate (6);
(5) The upper die (10) and the lower die (12) are utilized to compress the metal ring, the first reinforcing plate and the second reinforcing plate, and the metal ring, the first reinforcing plate and the second reinforcing plate are welded through the through holes (11) formed in the upper die (10), so that the metal ring, the first reinforcing plate and the second reinforcing plate (6) are locally welded together.
2. The method of manufacturing a biometric module with a key function according to claim 1, wherein the step (5) is performed by laser welding, and the metal ring, the first reinforcing plate and the second reinforcing plate are melted locally by laser in a laser direction (13) through a through hole (11) on the upper die (10), and the melted solutions of the three are mixed and are connected after solidification.
3. The biological recognition module with the key function manufactured based on the method of claim 1 or 2 comprises a cover plate (1), a chip (2), a flexible circuit board (4), a first reinforcing plate (5) and a second reinforcing plate (6) which are sequentially arranged from top to bottom, wherein metal rings are arranged on the peripheries of the cover plate (1) and the chip (2), the flexible circuit board (4) is wound below the second reinforcing plate, a key switch (7) is arranged below the flexible circuit board below the second reinforcing plate (6), and the biological recognition module is characterized in that the metal rings (3), the first reinforcing plate and the second reinforcing plate are partially welded together so that the metal rings are tightly connected with the first reinforcing plate, and the first reinforcing plate is tightly connected with the second reinforcing plate (6).
4. A biometric module with key function according to claim 3, wherein: and the metal ring layer, the first reinforcing plate and the second reinforcing plate are provided with at least two welding points.
5. The biological recognition module with the key function of claim 3, wherein the first reinforcing plate and the second reinforcing plate are both connected and conducted with the flexible circuit board through the conductive adhesive layer.
6. The biometric module with key function according to claim 5, wherein the conductive adhesive layer is formed to cover the flexible printed circuit board.
7. A biometric module with key function according to claim 3, wherein: the metal ring is made of stainless steel materials, and the first reinforcing plate and the second reinforcing plate are made of stainless steel materials.
8. A biometric module with key function according to claim 3, wherein the cover plate (1) is made of any one of sapphire, ceramic, glass or a coating.
9. The biometric module with key function according to claim 3, wherein the key switch (7) is a welded type tact switch or an adhesive type tact switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611030358.4A CN106778483B (en) | 2016-11-16 | 2016-11-16 | Biological recognition module with key function and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611030358.4A CN106778483B (en) | 2016-11-16 | 2016-11-16 | Biological recognition module with key function and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN106778483A CN106778483A (en) | 2017-05-31 |
| CN106778483B true CN106778483B (en) | 2023-08-22 |
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| CN201611030358.4A Active CN106778483B (en) | 2016-11-16 | 2016-11-16 | Biological recognition module with key function and manufacturing method thereof |
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Families Citing this family (2)
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| CN110032943B (en) * | 2019-03-18 | 2024-06-21 | 江西合力泰科技有限公司 | Biological recognition module and manufacturing method thereof |
| CN112911792B (en) * | 2021-01-27 | 2022-04-22 | 惠州Tcl移动通信有限公司 | FPC assembly and surface mounting method |
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| CN106778483A (en) | 2017-05-31 |
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