CN213754621U

CN213754621U - Side key fingerprint module and mobile terminal

Info

Publication number: CN213754621U
Application number: CN202022866411.2U
Authority: CN
Inventors: 石新兵
Original assignee: Kunshanqiu Titanium Biometric Technology Co Ltd
Current assignee: Kunshanqiu Titanium Biometric Technology Co Ltd
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2021-07-20
Anticipated expiration: 2030-12-02

Abstract

The utility model provides a side key fingerprint module, side key fingerprint module are including strengthening piece, electrically conductive base plate and adhesive, strengthen the piece including first binding face, are provided with the groove structure who is used for increasing cohesion in the first binding face, and adhesive is connected between first binding face and electrically conductive base plate to laminate first binding face and electrically conductive base plate, partly packing of adhesive is in groove structure. The utility model discloses a side key fingerprint module can improve the cohesion of strengthening the piece, strengthens the piece and can firmly attach on electrically conductive base plate, satisfies the customer requirement, also improves attached yield. The utility model also provides a mobile terminal.

Description

Side key fingerprint module and mobile terminal

Technical Field

The utility model relates to a terminal technology field, in particular to side key fingerprint module and mobile terminal.

Background

Along with the rapid development of the mobile internet era, the integrated functionality of the mobile phone is more complete, nowadays, the size of the screen has also developed to a critical point, and in order to pursue a better visual effect, another form of appearance innovation-full screen is produced. The coming of the full-face screen inevitably causes the innovation and the update of the fingerprint identification technology, so that the scheme of placing the fingerprint on the side edge of the mobile phone to form the side key fingerprint appears.

Present side key fingerprint module includes the fingerprint chip, fingerprint circuit substrate, reinforcement steel sheet and electrically conductive basal plate, the laminating of fingerprint chip is served at fingerprint circuit substrate's one, the reinforcement steel sheet is connected between fingerprint circuit substrate and electrically conductive basal plate, the reinforcement steel sheet is relative with the fingerprint chip, the both ends of electrically conductive basal plate can be fixed on the casing of complete machine, so electrically conductive basal plate plays the support, hang by the fingerprint chip, fingerprint circuit substrate and reinforcement steel sheet three form the effect of subassembly, be equipped with electrically conductive basic unit on the electrically conductive basal plate, when pressing the fingerprint chip, the complete machine can be pressed through electrically conductive basic unit and film key switch's metal shrapnel (DOME) and realize the on & off switch function.

The reinforcement steel sheet passes through glue and the laminating of electrically conductive base plate, electrically conductive base plate shape is the slenderness, the surface area is big on the left side, and be flexible material, when electrically conductive base plate and reinforcement steel sheet laminating, attached cohesion between the two is relatively poor, the higher and higher cohesion reliability requirement of customer can not be satisfied, even the reinforcement steel sheet passes through Plasma and washs (Plasma washs) the process after, laminate with electrically conductive base plate again, also hardly guarantee attached cohesion between the two and satisfy customer's demand, and then the equipment that influences the complete machine and produce the line production yield low. The technological process of the existing side key fingerprint module is approximately: the manufacturing method comprises the following steps of firstly attaching the reinforcing steel sheet to the fingerprint circuit substrate, then placing the conductive base panel on a plate, then carrying out Plasma cleaning on the reinforcing steel sheet, then attaching the reinforcing steel sheet to the conductive base panel, then gluing the key panel for pre-pressure maintaining, and finally baking in an oven. The reinforced steel sheet needs to be subjected to a special Plasma cleaning process, and the production cost is high.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a side key fingerprint module and mobile terminal can improve the cohesion of enhancement piece, and the enhancement piece can be attached firmly on electrically conductive base plate, satisfies the customer requirement, also improves attached yield.

The utility model provides a side key fingerprint module, glue including strengthening piece, electrically conductive base plate and bonding, strengthen the piece and include first binding face, be provided with the groove structure who is used for increasing the cohesion in the first binding face, bonding glue connects between first binding face and electrically conductive base plate to laminate first binding face and electrically conductive base plate, partly packing of bonding glue is in groove structure.

Further, the groove structure is in a grid shape.

Further, the groove structures are linear and are multiple, and each groove structure is arranged at intervals.

Further, side key fingerprint module still includes the double faced adhesive tape, and the double faced adhesive tape is connected between adhesive tape and electrically conductive base panel.

Further, side key fingerprint module still includes circuit substrate and fingerprint chip, strengthens the piece and still includes the second binding face relative with first binding face, and circuit substrate is located between fingerprint chip and the second binding face, and second binding face and the laminating of circuit substrate, fingerprint chip and the laminating of circuit substrate to with circuit substrate electric connection.

Further, the fingerprint chip includes the protective layer, and the protective layer setting is kept away from circuit substrate on one side at the fingerprint chip.

Further, electrically conductive base panel includes electrically conductive basic body and location arch, and electrically conductive basic body and location arch all locate electrically conductive base panel and keep away from the one side of reinforcing piece.

Further, the conductive base body is disposed coaxially with the positioning projection.

The utility model also provides a mobile terminal, including casing and foretell side key fingerprint module, electrically conductive base plate fixes on the casing.

The utility model discloses a reinforcing piece of side key fingerprint module passes through adhesive and electrically conductive base plate and laminating, because be provided with the groove structure in the first binding face, a part of adhesive can fill in the groove structure, has improved the combination of reinforcing piece and adhesive greatly, so improved the cohesion of reinforcing piece, the reinforcing piece can be attached on electrically conductive base plate firmly, satisfies customer's requirement, has also improved the attached yield; and the groove structure has no influence on the flatness of the reinforcing sheet, and the bonding force between the reinforcing sheet and the adhesive is improved, so that a special plasma cleaning process is omitted, and the production cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a side key fingerprint module according to a first embodiment of the present invention.

Fig. 2 is an enlarged schematic structural view of a point a in fig. 1.

Fig. 3 is a schematic structural diagram of another view angle of the side key fingerprint module according to the first embodiment of the present invention.

Fig. 4 is a schematic structural view of a first bonding surface of a reinforcing sheet according to a first embodiment of the present invention.

Fig. 5 is a schematic structural view of a side surface of the conductive base panel according to the first embodiment of the present invention.

Fig. 6 is a schematic structural view of a first bonding surface of a reinforcing sheet according to a second embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a side key fingerprint module according to a third embodiment of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Fig. 1 is a schematic structural diagram of a side key fingerprint module according to a first embodiment of the present invention. Fig. 2 is an enlarged schematic structural view of a point a in fig. 1. Fig. 3 is a schematic structural diagram of another view angle of the side key fingerprint module according to the first embodiment of the present invention. Referring to fig. 1 to 3, the side key fingerprint module 10 includes a fingerprint chip 12, a circuit board 13, a reinforcing sheet 14, an adhesive 15, and a conductive substrate 16. The circuit substrate 13 is located between the fingerprint chip 12 and the reinforcing sheet 14, specifically, one end of the circuit substrate 13 is located between the fingerprint chip 12 and the reinforcing sheet 14, the fingerprint chip 12 is attached to the circuit substrate 13 and electrically connected to the circuit substrate 13, the reinforcing sheet 14 is attached to the circuit substrate 13, the fingerprint chip 12 is opposite to the reinforcing sheet 14, and the adhesive 15 is connected between the reinforcing sheet 14 and the conductive base panel 16 so as to attach the reinforcing sheet 14 to the conductive base panel 16.

The conductive base panel 16 is used for being fixedly connected with the shell, and the reinforcing sheet 14 is attached to the conductive base panel 16, so that the conductive base panel 16 plays a role in supporting and suspending the fingerprint chip 12, the circuit substrate 13 and the reinforcing sheet 14, and also ensures that a part of the fingerprint chip 12 can be exposed out of the shell, so that the fingerprint chip 12 serves as a key; in addition, when the pressure applied to the fingerprint chip 12 is removed, the fingerprint chip 12 can be reset by the elastic force of the conductive base panel 16.

In this embodiment, the reinforcing sheet 14 may be specifically a steel sheet, but not limited thereto, for example, in other embodiments, the reinforcing sheet 14 may also be another hard material; the reinforcing sheet 14 may be attached to the circuit substrate 13 by a conductive adhesive, and the adhesive 15 may be specifically a thermosetting adhesive, but not limited thereto; the conductive base panel 16 is made of a flexible material, and preferably, the material of the conductive base panel 16 is silicon gel, but not limited thereto.

Specifically, as shown in fig. 1, the fingerprint chip 12 includes a protection layer 121, the protection layer 121 is disposed on a side of the fingerprint chip 12 away from the circuit substrate 13, and the protection layer 121 may be, specifically, a metal plating layer, but is not limited thereto, for example, in other embodiments, the protection layer 121 may also be a glass layer.

Fig. 4 is a schematic structural view of a first bonding surface of a reinforcing sheet according to a first embodiment of the present invention. As shown in fig. 2 and 4, the reinforcing sheet 14 includes a first attaching surface 141 and a second attaching surface 142, the first attaching surface 141 and the second attaching surface 142 are disposed opposite to each other, and a groove structure 143 for increasing the coupling force is disposed in the first attaching surface 141, specifically, the groove structure 143 is in a grid shape and is uniformly distributed in the first attaching surface 141. The first attaching surface 141 is attached to the conductive base panel 16, a portion of the adhesive 15 is filled in the groove structure 143, and the second attaching surface 142 is attached to the circuit substrate 13. Since the circuit board 13 is a flexible circuit board, the reinforcing sheet 14 can reinforce the strength of the circuit board 13, so that the circuit board 13 can support the fingerprint chip 12. In the embodiment, the groove structure 143 may be formed by an etching process, preferably, both the etching depth and the etching width are less than or equal to 0.06mm, the etching center distance is 0.16mm, and the groove structure 143 may be formed by one-step etching, which is low in cost.

Fig. 5 is a schematic structural view of a side surface of the conductive base panel according to the first embodiment of the present invention. As shown in fig. 2 and 5, the conductive base panel 16 is a flat strip, the conductive base panel 16 includes a conductive base body 161 and a positioning protrusion 162, the conductive base body 161 and the positioning protrusion 162 are both disposed on one side of the conductive base panel 16 away from the reinforcing sheet 14, the conductive base body 161 and the positioning protrusion 162 are coaxially disposed, so as to determine the position of the conductive base body 161, when positioning, only the positioning protrusion 162 needs to be disposed on a specific position of the membrane key switch circuit board, and the position of the conductive base body 161 projected on the membrane key switch circuit board can be determined, so as to ensure that the conductive base body 161 can be opposite to the membrane key switch on the membrane key switch circuit board, and when the conductive base body 161 moves towards the membrane key switch, the conductive base body 161 can be pressed with a metal DOME (DOME) of the membrane key switch to implement a key function. In this embodiment, the conductive base panel 16 is provided with hook structures 163 at two ends, and the hook structures 163 are used for being fixedly connected with the housing.

The working principle of the side key fingerprint module 10 of this embodiment is roughly: when the reinforcing sheet 14 is attached to the conductive base panel 16 through the adhesive 15, the first attachment surface 141 is provided with the groove structure 143 for increasing the bonding force, and a part of the adhesive 15 can be filled in the groove structure 143, so that the bonding between the reinforcing sheet 14 and the adhesive 15 is greatly improved, the bonding force of the reinforcing sheet 14 is improved, the reinforcing sheet 14 can be stably attached to the conductive base panel 16, the customer requirements are met, and the attachment yield is also improved; and the groove structure 143 has no influence on the flatness of the reinforcing sheet 14, and the bonding force of the reinforcing sheet 14 is improved, so that a special plasma cleaning process is omitted, and the production cost is reduced.

As shown in fig. 1, B is a pressing direction of the fingerprint chip 12, when a finger presses the fingerprint chip 12 along the B direction, the conductive base panel 16 is deformed by a force, at this time, the conductive base body 161 located above the membrane key switch approaches towards the membrane key switch, and after the conductive base body 161 moves a certain distance, the conductive base panel 16 presses a metal DOME (DOME) of the membrane key switch to realize a key function, specifically, a key function of a switch is realized, but not limited thereto, after the key function is completed, the finger leaves the fingerprint chip 12, because the conductive base panel 16 is made of a flexible material, and has a certain elasticity, the fingerprint chip 12 can be reset under the elastic force of the conductive base panel 16.

Second embodiment

The structure of the side key fingerprint module 10 of the present embodiment is the same as the structure of the side key fingerprint module 10 of the first embodiment, except that the first attaching surface 141 of the present embodiment is different from the first attaching surface 141 of the first embodiment.

Fig. 6 is a schematic structural view of a first bonding surface 141 of a reinforcing sheet according to a second embodiment of the present invention. As shown in fig. 6, the groove structures 143 of the present embodiment are linear and have a plurality of groove structures, and each of the groove structures 143 is disposed at an interval. A part of the adhesive 15 may be filled in the linear groove structure 143, which improves the bonding between the reinforcing sheet 14 and the adhesive 15, so as to improve the bonding force of the reinforcing sheet 14. The working principle of the side key fingerprint module 10 of the present embodiment is the same as that of the side key fingerprint module 10 of the first embodiment, and the specific case thereof refers to the working principle of the side key fingerprint module 10 of the first embodiment, which is not described herein.

Third embodiment

Fig. 7 is a schematic structural diagram of a side key fingerprint module according to a third embodiment of the present invention. As shown in fig. 7, the structure of the side key fingerprint module 10 of this embodiment is substantially the same as that of the side key fingerprint module 10 of the second embodiment, except that the side key fingerprint module 10 of this embodiment further includes a double-sided tape 17.

Specifically, the double-sided tape 17 is connected between the adhesive tape 15 and the conductive base panel 16, and the adhesive tape 15 is used to attach the reinforcing sheet 14 to the double-sided tape 17. Because the adhesive 15 needs to be cured after a period of time, and the surface of the conductive base panel 16 is relatively smooth, in the transferring process, the reinforcing sheet 14 can shake, which causes the reinforcing sheet 14 to deviate from the attaching position and other influences, but because the surface roughness of the double-sided adhesive 17 is higher than that of the conductive base panel 16, in the transferring process, the reinforcing sheet 14 cannot shake, and meanwhile, the double-sided adhesive 17 also has certain viscosity, which can further enhance the bonding force of the reinforcing sheet 14. The working principle of the side key fingerprint module 10 of the present embodiment is the same as that of the side key fingerprint module 10 of the second embodiment, and the specific situation refers to the working principle of the side key fingerprint module 10 of the second embodiment, which is not described herein.

The utility model discloses a reinforcing piece 14 of side key fingerprint module 10 passes through adhesive 15 and electrically conducts the base panel 16 and laminates, because be provided with groove structure 143 in the first binding face 141, a part of adhesive 15 can fill in groove structure 143, has improved the combination of reinforcing piece 14 and adhesive 15 greatly, so improved the cohesion of reinforcing piece 14, reinforcing piece 14 can be attached firmly on electrically conducts the base panel 16, satisfies customer's requirement, has also improved the attached yield; and the groove structure 143 has no influence on the flatness of the reinforcing sheet 14, and the bonding force between the reinforcing sheet 14 and the adhesive 15 is improved, so that a special plasma cleaning process is omitted, and the production cost is reduced.

The utility model also provides a mobile terminal, including casing and foretell side key fingerprint module 10, electrically conductive base plate 16 is fixed on the casing.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention, and can be modified to various simple variants, and these simple variants all belong to the protection scope of the present invention. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

Claims

1. The utility model provides a side key fingerprint module, characterized in that, includes reinforcing piece (14), electrically conductive base panel (16) and adhesive glue (15), reinforcing piece (14) include first binding face (141), be provided with groove structure (143) that are used for increasing cohesion in first binding face (141), adhesive glue (15) connect in first binding face (141) with between electrically conductive base panel (16), with first binding face (141) with the laminating of electrically conductive base panel (16), some packing of adhesive glue (15) are in groove structure (143).

2. The side key fingerprint module of claim 1, wherein the groove structure (143) is in the form of a grid.

3. The side key fingerprint module of claim 1, wherein the groove structures (143) are linear and are multiple, and each of the groove structures (143) are spaced apart from each other.

4. A side key fingerprint module according to claim 1, further comprising a double sided tape (17), said double sided tape (17) being connected between said adhesive tape (15) and said conductive base panel (16).

5. The side key fingerprint module of claim 1, further comprising a circuit substrate (13) and a fingerprint chip (12), wherein the stiffener (14) further comprises a second attachment surface (142) opposite to the first attachment surface (141), the circuit substrate (13) is located between the fingerprint chip (12) and the second attachment surface (142), the second attachment surface (142) is attached to the circuit substrate (13), and the fingerprint chip (12) is attached to the circuit substrate (13) and electrically connected to the circuit substrate (13).

6. A side key fingerprint module according to claim 5, wherein the fingerprint chip (12) comprises a protective layer (121), the protective layer (121) being arranged on a side of the fingerprint chip (12) remote from the circuit substrate (13).

7. The side key fingerprint module of claim 1, wherein the conductive base panel (16) comprises a conductive base body (161) and a positioning protrusion (162), and the conductive base body (161) and the positioning protrusion (162) are both disposed on a side of the conductive base panel (16) away from the reinforcing sheet (14).

8. The side key fingerprint module of claim 7, wherein the conductive base body (161) is arranged coaxially with the positioning protrusion (162).

9. A mobile terminal, characterized in that it comprises a housing and a side key fingerprint module according to any one of claims 1 to 8, said conductive base panel (16) being fixed on said housing.