CN206178885U - Fingerprint module and mobile terminal - Google Patents

Abstract

The embodiment of the utility model provides a fingerprint module, including: a fingerprint button, a flexible circuit board, a waterproof silicone cover and a bracket, the fingerprint button is set on the flexible circuit board; the flexible circuit board is set on the waterproof silicone cover; the waterproof silicone cover includes : the inner ring body and the outer ring body, the inner ring body is in contact with the flexible circuit board, and the first liquid adhesive layer is set at the gap between the inner ring body and the flexible circuit board to seal the gap between the inner ring body and the flexible circuit board The gap; the waterproof silicone sleeve is set on the bracket, the first surface of the outer ring body is in contact with the surface of the bracket, the second surface of the outer ring body is provided with an adhesive layer, and the first surface of the outer ring body is in contact with the second surface of the outer ring body. The surfaces are opposite, and the second surface of the outer ring casing is used to contact the cover of the mobile terminal. The embodiment of the utility model also provides a mobile terminal. In the embodiment of the utility model, by setting the first liquid state and the back glue, the places where gaps are likely to occur can be sealed to avoid damage to the device caused by liquid ingress.

Description

A fingerprint module and mobile terminal

technical field

The utility model relates to the technical field of fingerprint modules, in particular to a fingerprint module and a mobile terminal.

Background technique

At present, the fingerprint module is often combined with the design of the button structure, and the button structure needs to realize the function of pressing, so there must be a movable gap in the design. Therefore, the structural design of the fingerprint module has high requirements for liquid resistance. It is necessary to ensure the normal pressing function of the button dome, so that the liquid (sweat, rain, etc.) cannot reach the main board and other key components inside the mobile terminal, thereby affecting Mobile terminal whole machine use function.

The main liquid intake paths of the above-mentioned fingerprint module are: a. Liquid intake from between the metal ring (Bezel) of the fingerprint module and the touch screen cover; b. Liquid intake from the metal ring (Bezel) of the fingerprint module and the ceramic Liquid gets in between the covers.

Utility model content

The embodiment of the utility model provides a fingerprint module to solve the problem that the fingerprint module in the prior art is easy to enter liquid.

The embodiment of the utility model also provides a mobile terminal to solve the problem that the fingerprint module of the mobile terminal in the prior art is easy to get liquid.

In the first aspect, a fingerprint module is provided, which is used in a mobile terminal. The fingerprint module includes: a fingerprint button, a flexible circuit board, a waterproof silicone cover and a bracket, and the fingerprint button is arranged on the flexible circuit board; The flexible circuit board is arranged on the waterproof silicone sleeve; the waterproof silicone sleeve includes: an inner sleeve body and an outer sleeve body, the inner sleeve body is in contact with the flexible circuit board, and the inner sleeve body and the outer sleeve body are in contact with the flexible circuit board. A first liquid adhesive layer is provided at the gap between the flexible circuit boards to seal the gap between the inner ring body and the flexible circuit board; the waterproof silicone sleeve is arranged on the bracket, and the outer ring body The first surface of the outer ring body is in contact with the surface of the bracket, the second surface of the outer ring body is provided with an adhesive layer, the first surface of the outer ring body is opposite to the second surface of the outer ring body, the The second surface of the outer ring sleeve is used for contacting the cover of the mobile terminal.

In a second aspect, a mobile terminal is provided, including: the above-mentioned fingerprint module.

In this way, in the embodiment of the present utility model, the first liquid adhesive layer is provided at the gap between the inner ring body of the waterproof silicone sleeve and the flexible circuit board, and the back is provided on the second surface of the outer ring body of the waterproof silicone sleeve. The adhesive layer can seal the places where gaps are likely to occur, so as to avoid damage to the device caused by liquid ingress and affect the use of the fingerprint module.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the utility model. Obviously, the accompanying drawings in the following description are only the illustrations of the utility model. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

Fig. 1 is the sectional view of the fingerprint module of the utility model embodiment;

Fig. 2 is the structural representation of the waterproof silicone cover of the fingerprint module of the embodiment of the present invention;

Fig. 3 is a structural schematic diagram of the flexible circuit board of the fingerprint module according to the embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. . Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The embodiment of the utility model provides a fingerprint module. The fingerprint module of this embodiment is used for mobile terminals. As shown in FIGS. 1 to 3 , the fingerprint module of this embodiment includes: a fingerprint button 1 , a flexible circuit board 2 , a waterproof silicone case 3 and a bracket 4 .

Wherein, the fingerprint button 1 is arranged on the flexible circuit board 2 . The flexible circuit board 2 is set on the waterproof silicone sleeve 3 .

The waterproof silicone sleeve 3 includes: an inner ring casing body 31 and an outer ring casing body 32 . Wherein, the inner ferrule body 31 is arranged in contact with the flexible circuit board 2 . Therefore, there will be a gap between the inner ferrule body 31 and the flexible circuit board 2; and, during the process of pressing the fingerprint button 1, the waterproof silicone sleeve 3 will be squeezed to generate a deformation force, which may increase the gap. In order to avoid liquid entering from the gap, a first liquid glue is applied to the gap between the inner snare body 31 and the flexible circuit board 2 to form a first liquid glue layer to seal between the inner snare body 31 and the flexible circuit board 2 gap.

The waterproof silicone sleeve 3 is arranged on the bracket 4 . The first surface of the outer ferrule body 32 is in contact with the surface of the bracket 4 , and the second surface of the outer ferrule body 32 is provided with an adhesive layer 6 . The first surface of the outer ferrule body 32 is opposite to the second surface of the outer ferrule body 32 . The second surface of the outer ring casing 32 is used for contacting the cover of the mobile terminal. When the cover body of the mobile terminal is crimped on the second surface of the outer ring body 32, the gap between the contact surface of the cover body of the mobile terminal and the outer ring body 32 is easy to enter liquid. The cover body of the terminal and the second surface of the outer ring sleeve body 32 avoid gaps and can effectively prevent liquid from entering.

The fingerprint module of the embodiment of the utility model is provided with a first liquid adhesive layer at the gap between the inner ring body 31 and the flexible circuit board 2, and an adhesive layer 6 is provided on the second surface of the outer ring body 32, so that the The places where gaps are likely to occur are sealed to avoid damage to the device caused by liquid ingress and affect the use of the fingerprint module.

Preferably, the fingerprint module further includes: a reinforcement board 5 , the reinforcement board 5 includes a first part in contact with the inner ferrule body 31 and a second part wrapped by the flexible circuit board 2 . Wherein, the second part of the reinforcement plate 5 wrapped by the flexible circuit board 2 is arranged between the waterproof silicone sleeve 3 and the fingerprint button 1, and is used to solve the problem that the flexible circuit board 2 is easily deformed or affected by pressing force due to its flexibility. The problem of damage is improved, the strength of the plug-in part is improved, and the overall assembly of the product is convenient.

Specifically, a through hole 1 is provided between any end of the inner ferrule body 31 and the outer ferrule body 32 , and the number of the through holes is not limited here; a through hole 2 is also provided in the middle of the inner ferrule body 31 . One end of the flexible circuit board 2 connected to the fingerprint button 1 first extends along the first surface of the outer ferrule body 32 and the first surface of the inner ferrule body 31, bends for the first time and passes through the through hole 2 of the inner ferrule body 31 , the angle of the first bending is 1° to 90°, preferably 45°; after the second bending, the through hole 2 is covered, and the direction before the first bending is continued along the direction before the first bending. The two surfaces are extended, and the angle of the second bend is 1° to 90°, preferably 45°; when extending to the first through hole, the flexible circuit board 2 is bent for the third time, and the angle of the third bend is 91°～180°, preferably 180°, the transition ring formed by the third bending of the flexible circuit board 2 is set in the first through hole; The bottom surface of the bottom extends and is connected with the bottom surface of the fingerprint button 1; so far, the second part of the reinforcement board 5 is wrapped by the flexible circuit board 2 and arranged between the waterproof silicone sleeve 3 and the fingerprint button 1. Wherein, since the part of the flexible circuit board 2 before the first bending is extended along the first surface of the outer ferrule body 32 and the first surface of the inner ferrule body 31, the part of the reinforcing plate 5 corresponding to this part of the flexible circuit board 2 It cannot be completely wrapped, so the first surface of this part of the reinforcing plate 5 is in direct contact with the second surface of the inner ferrule body 31 . Wherein, the first surface of the inner ferrule body 31 is opposite to the second surface of the inner ferrule body 31 .

In order to prevent liquid from entering the gap of the contact surface, the second liquid glue is applied between the first surface of the first part of the reinforcement plate 5 in contact with the second surface of the inner ferrule body 31 to form the second liquid glue layer 7 to ensure that the inner The second surface of the snare body 31 is fully adhered to the first surface of the reinforcing plate 5 , which can effectively prevent liquid from entering under the normal assembly and bonding process of the production line.

Preferably, since the flexible circuit board 2 passes through the through hole 2 of the waterproof silicone sleeve 3 after being bent for the first time, when the first liquid glue is applied, the part of the flexible circuit board 21 that passes through the second through hole is connected with the through hole 2. The gap between the inner wall of the second hole is not coated with the first liquid glue, that is, the gap between the part of the flexible circuit board 21 passing through the second hole and the inner wall of the second hole lacks the first liquid glue layer; Except for one side of the second part of the flexible circuit board 21 that is in contact with the inner wall of the through hole 2, the gap formed by the other sides in contact with the waterproof silicone sleeve 3 needs to be coated with the first liquid glue to form the first liquid glue layer. The purpose of not coating the above-mentioned positions with the first liquid glue is to prevent the first liquid glue from overflowing onto other devices and affecting the use of other devices.

Preferably, the first liquid adhesive layer is a silicone liquid adhesive layer, for example, the silicone liquid adhesive with the brand name Fuller FH1007 can be selected. Ordinary solid glue or liquid glue and waterproof silicone cover 3 are not easy to paste. The silicone liquid glue that is preferred in the embodiment of the utility model utilizes the principle of similar compatibility of the silica gel system, and the paste effect of the silicone liquid glue and the reinforcing plate 5 is also good. When the silicone liquid glue overflows to the reinforcing plate 5, it can also play the role of bonding the reinforcing plate 5 and the waterproof silicone sleeve 3. In addition, the silicone liquid glue is liquid during coating and has a certain degree of permeability, which can effectively ensure that the gap between the waterproof silicone sleeve 3 and the flexible circuit board 2 and even the reinforcing plate 5 is filled and sealed by the penetration of the silicone liquid glue. Ensure the consistency of liquid resistance.

More preferably, the coating width of the first liquid adhesive layer is 0.6-1.2 mm. The gap between the inner ring body 31 and the flexible circuit board 2 generally has a width of 0.5 mm. Therefore, in order to better achieve the sealing and liquid-proof effect, the coating width of the first liquid adhesive layer is selected to be 0.6-1.2 mm, which can ensure The gap is completely covered, and the setting and use of other devices will not be affected due to the wide coating width.

Preferably, the back adhesive layer 6 is a double-sided adhesive layer, for example, the double-sided adhesive of Crown 7982 is optional. The cover body of the mobile terminal and the second surface of the outer ring casing 31 can be pasted tightly by the double-sided adhesive tape. More preferably, the thickness of the adhesive layer 6 is 0.04-0.06 mm, preferably 0.05 mm. The back adhesive layer 6 of this thickness can not only ensure effective sealing, but also will not cause new gaps due to unevenness due to excessive thickness, and will not affect the fingerprint module in the small space of the mobile terminal due to excessive thickness. Install.

Preferably, the second liquid adhesive layer 7 is an anti-perspiration liquid adhesive layer, for example, the anti-perspiration liquid adhesive of the optional brand of Anyone A8100RT. Since sweat is easy to enter between the first surface of the first part of the reinforcing plate 5 in contact with each other and the second surface of the inner ring body 31 of the waterproof silicone sleeve 3, the anti-perspiration liquid glue is selected here to avoid sweat on the waterproof silicone sleeve. 3 and the erosion of the reinforcing plate 5. More preferably, the thickness of the second liquid adhesive layer 7 is 0.08-0.12 mm. The second liquid adhesive layer 7 of this thickness can not only ensure effective sealing, but also will not cause new gaps due to unevenness due to excessive thickness, and will not affect the small space of the fingerprint module in the mobile terminal due to excessive thickness. within the installation.

To sum up, the fingerprint module of the embodiment of the present utility model, by setting the first liquid glue layer made of silicone liquid glue at the gap between the inner ring body 31 of the waterproof silicone sleeve 3 and the flexible circuit board 2, is based on the silicone liquid glue. The good similar compatibility between the glue and the waterproof silicone sleeve 3 can effectively prevent liquid from entering the gap between the inner ring sleeve body 31 and the flexible circuit board 2; on the second surface of the outer ring sleeve body 32 of the waterproof silicone sleeve 3 Adhesive layer 6 is set, when the fingerprint module is installed in the mobile terminal, it can prevent liquid from entering the gap between the second surface of the outer ring casing 32 and the contact surface of the cover of the mobile terminal; Between the first surface of the strong plate 5 and the second surface of the inner ring body 31 of the waterproof silicone sleeve 3, a second liquid adhesive layer 7 made of anti-perspiration liquid adhesive is provided, which can effectively prevent liquid, especially sweat, from entering the place. And corrode the inner ring casing body 31 and the reinforcement plate 5 .

The embodiment of the utility model provides a mobile terminal. The mobile terminal may be, but not limited to, a mobile phone, a tablet computer, an MP3/MP4, a smart watch, a smart bracelet, a personal digital assistant (Personal Digital Assistant, PDA), a vehicle-mounted computer, and the like.

The mobile terminal includes the above-mentioned fingerprint module. For the specific structure of the fingerprint module, reference can be made to the above-mentioned embodiments, which will not be repeated here.

Since the fingerprint module of the mobile terminal adopts the anti-liquid treatment in the above-mentioned embodiments, the fingerprint module of the mobile terminal has a good anti-liquid effect, which avoids damage to the device caused by liquid ingress and affects the overall performance of the mobile terminal. The use of the mobile terminal improves the user's satisfaction with using the mobile terminal, and improves the competitiveness of the mobile terminal in the same type of products.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

Having described preferred embodiments of embodiments of the present invention, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be interpreted to cover the preferred embodiment and all changes and modifications that fall within the scope of the embodiments of the present invention.

Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or terminal equipment comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements identified, or also include elements inherent in such a process, method, article, or end-equipment. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising said element.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (11)

1. a kind of fingerprint module, for mobile terminal, it is characterised in that the fingerprint module includes：Fingerprint button, flexible circuit Plate, water-proof silica-gel set and support,

The fingerprint button is arranged on the flexible PCB；

The flexible PCB is arranged on the water-proof silica-gel and puts；

The water-proof silica-gel set includes：Inner ring body and outer ring body, the inner ring body are contacted with the flexible PCB, At gap between the inner ring body and the flexible PCB set the first liquid glue-line, with seal the inner ring body and Gap between the flexible PCB；

The water-proof silica-gel is set on the support, and first surface and the surface of the support of the outer ring body connect Touch, gum layer, the first surface of the outer ring body and the outer ring body are set on the second surface of the outer ring body Second surface is relative, and the second surface of the outer ring body is used to be contacted with the lid of the mobile terminal.

2. fingerprint module according to claim 1, it is characterised in that

Also include：Stiffening plate, the stiffening plate includes the Part I contacted with the inner ring body；Wherein, Part I is mended The first surface of strong plate is contacted with the second surface of the inner ring body, the first surface of the Part I stiffening plate with it is described Second liquid glue-line is set between the second surface of inner ring body.

3. fingerprint module according to claim 2, it is characterised in that：

The stiffening plate is also comprising the Part II wrapped up by the flexible PCB；

Through hole one, the middle part of the inner ring body are provided between the either end of the inner ring body and the outer ring body Through hole two is additionally provided with, the first surface of the inner ring body is relative with the second surface of the inner ring body；

Prolong along the first surface of the outer ring body and the first surface of the inner ring body one end on the flexible PCB Stretch, bend for the first time and passed from the through hole two, the angle of the first time bending is 1 °~90 °；Edge after bending for second The second surface of the inner ring body extends, and the angle of second bending is 1 °~90 °；The flexible PCB is extended to The through hole carries out third time bending for the moment, and the angle of the third time bending is 91 °~180 °；The flexible PCB is along institute The bottom surface for stating fingerprint button extends and is connected with the bottom surface contact of the fingerprint button；

The Part II stiffening plate wrapped up by the flexible PCB is arranged between water-proof silica-gel set and fingerprint button.

4. fingerprint module according to claim 3, it is characterised in that：From the partially flexible wiring board that the through hole two is passed The first liquid glue-line is lacked with the gap between the madial wall of through hole two.

5. fingerprint module according to claim 1, it is characterised in that：The first liquid glue-line is silica gel liquid glue-line.

6. fingerprint module according to claim 1, it is characterised in that：The coating width of the first liquid glue-line is 0.6 ~1.2mm.

7. fingerprint module according to claim 1, it is characterised in that：The gum layer is double faced adhesive tape.

8. fingerprint module according to claim 1, it is characterised in that：The thickness of the gum layer is 0.04~0.06mm.

9. fingerprint module according to claim 2, it is characterised in that：The second liquid glue-line is anti-sweat state glue-line.

10. fingerprint module according to claim 2, it is characterised in that：The thickness of the second liquid glue-line be 0.08~ 0.12mm。

A kind of 11. mobile terminals, it is characterised in that including：Fingerprint module as described in any one of claim 1~10.