WO2022252809A1

WO2022252809A1 - Waterproof fingerprint module and terminal

Info

Publication number: WO2022252809A1
Application number: PCT/CN2022/085590
Authority: WO
Inventors: 郭海超
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-05-31
Filing date: 2022-04-07
Publication date: 2022-12-08
Also published as: CN215833928U

Abstract

Embodiments of the present application provide a waterproof fingerprint module, configured to be disposed on a terminal housing to sense fingerprints, and comprising a support (100), a key switch (200), a sealing member (300), a fingerprint recognition module (400), and a first waterproof member (500). The support (100) has a first surface (110) and a second surface (120) arranged opposite to each other, and the support (100) is provided with a through support (100) and a support through hole (130) extending from the first surface (110) to the second surface (120); the key switch (200) is disposed on one side of the second surface (120); the sealing member (300) is disposed on the first surface (110) and configured to fit the terminal housing (800), and the sealing member (300) is provided with a sealing member through hole (310) communicated with the support through hole (130); the fingerprint recognition component (400) comprises a fingerprint recognition chip (410) and a first FPC (420), and the fingerprint recognition chip (410) is attached onto the first FPC (420). In addition, the embodiments of the present application further provide a terminal.

Description

Waterproof fingerprint module and terminal

cross reference

This application is based on the Chinese patent application with the application number "2021212170545" and the filing date is May 31, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference. Application.

technical field

The embodiments of the present application relate to the technical field of smart devices, and in particular to a waterproof fingerprint module and a terminal.

Background technique

Fingerprint recognition is a technology for identity authentication by comparing the detailed feature points of different fingerprints. At present, fingerprint recognition modules have become standard devices for smart terminals.

In some cases, under-screen fingerprint modules are more commonly used in mobile phone products. By installing fingerprint recognition devices under the screen and using the characteristics of the screen not blocking light to detect the fingerprint characteristics of the touch screen, and then realize identity recognition. In this case, the fingerprint identification device is located under the screen. Under the barrier of the screen, the fingerprint module under the screen is inherently waterproof, so it can meet the waterproof requirements of mobile phone products during daily use.

With the continuous research and development and progress of technology, it is also possible to use the side fingerprint module in mobile phone products. Using the side fingerprint module in mobile phone products and linking with the button switch can realize fingerprint recognition by using the side fingerprint module. At the same time, additional key functions are realized. However, in order to realize the button function, the side-mounted fingerprint module needs to be movable relative to the mobile phone product casing. Therefore, there is a gap between the fingerprint recognition module and the key opening of the mobile phone product casing, which makes the side-mounted fingerprint module of the mobile phone product The waterproof function of the fingerprint module is difficult to realize.

Utility model content

Some embodiments of the present application provide a waterproof fingerprint module, which is arranged on the terminal housing to sense fingerprints, including a bracket, a key switch, a seal, a fingerprint recognition component, and a first waterproof component; A surface and a second surface, the bracket is provided with a bracket through hole that passes through the bracket and extends from the first surface to the second surface; the key switch is arranged on one side of the second surface The seal is arranged on the first surface and is used to fit the terminal housing, the seal has a seal through hole communicating with the bracket through hole; the fingerprint recognition component includes a fingerprint recognition chip and a first FPC , the fingerprint identification chip is pasted on the first FPC, the first FPC is arranged above the sealing member, and one end of the first FPC passes through the through hole of the sealing member and the bracket in sequence A through hole and extending to one side of the second surface; the fingerprint identification component is used to expose to the outside of the terminal housing through the button opening of the terminal housing, so as to detect fingerprints when touched; the first waterproof member It is arranged in the through hole of the bracket to seal the gap between the first FPC and the wall of the through hole of the bracket.

Some embodiments of the present application also provide a terminal, including a terminal housing and the above-mentioned waterproof fingerprint module; the terminal housing has key openings; the bracket is detachably connected to the terminal housing; the sealing The component is attached to the terminal housing; the fingerprint identification component passes through the key opening and is exposed to the outside of the terminal housing.

Description of drawings

Fig. 1 is a cross-sectional view of a waterproof fingerprint module provided by some embodiments of the present application;

Fig. 2 is a schematic structural view of a seal provided on the bracket in Fig. 1;

Fig. 3 is a schematic diagram of the assembly structure of the waterproof fingerprint module and the terminal housing provided by some embodiments of the present application;

Fig. 4 is a cross-sectional view of the waterproof fingerprint module provided by some embodiments of the present application when it is installed on the terminal housing;

FIG. 5 is a cross-sectional view from another direction when the waterproof fingerprint module provided by some embodiments of the present application is installed on the terminal housing.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the application, many technical details are provided for readers to better understand the application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can also be realized. The division of the following embodiments is for the convenience of description, and should not constitute any limitation to the specific implementation of the present application, and the embodiments can be combined and referred to each other on the premise of no contradiction.

Some embodiments of the present application provide a waterproof fingerprint module, as shown in FIG. 1 to FIG. The module includes a bracket 100, a key switch 200, a sealing member 300, a fingerprint recognition component 400 and a first waterproof member 500, wherein the bracket 100 has a first surface 110 and a second surface 120 oppositely arranged, and the bracket 100 is provided with a penetrating The bracket 100, and the bracket through hole 130 extending from the first surface 110 to the second surface 120; the key switch 200 is arranged on the side of the second surface 120 of the bracket 100; the seal 300 is arranged on the first surface 110 of the bracket 100 and is used for Fit the terminal housing 800, and the seal 300 has a seal through hole 310 communicating with the bracket through hole 130; the fingerprint recognition component 400 includes a fingerprint recognition chip 410 and a first FPC (Flexible Printed Circuit, flexible circuit board) 420, fingerprint The identification chip 410 is pasted on the first FPC420, the first FPC420 is arranged above the seal 300, and one end of the first FPC420 passes through the through hole 310 of the seal and the through hole 130 of the bracket in turn, and extends to the second surface of the bracket 100 120 side, the fingerprint identification component 400 is used to expose to the outside of the terminal housing 800 through the key opening 810 of the terminal housing 800, so as to detect fingerprints when touched; the first waterproof member 500 is arranged in the bracket through hole 130 1. Seal the gap between the first FPC 420 and the wall of the bracket through hole 130 . The bracket 100 is the basis for installing the waterproof fingerprint module on the terminal housing 800, and is used to fix the waterproof fingerprint module on the terminal housing 800, while the seal 300 is used for sealing between the bracket 100 and the terminal housing 800. Form a seal. It should be noted that the key switch 200 may be, but not limited to, a volume key switch or a power key switch on the terminal.

In the waterproof fingerprint module provided by some embodiments of the present application, a sealing member 300 is arranged on the first surface 110 of the bracket 100, and the fingerprint recognition component 400 is arranged above the sealing member 300, and at the same time, the first FPC 420 of the fingerprint recognition component 400 One end passes through the seal through hole 310 and the bracket through hole 130, so that after the waterproof fingerprint module is fixed on the terminal housing 800 through the bracket 100, the fingerprint recognition component 400 located above the seal 300 can pass through the terminal The key opening 810 of the housing 800 is exposed to the outside of the terminal housing 800 to accept touch and detect fingerprints, while the sealing member 300 can achieve a sealing effect between the bracket 100 and the terminal housing 800, while using the first waterproof member 500 seals the gap between the first FPC 420 and the through hole 130 of the bracket, so that under the sealing and barrier effect of the sealing member 300 and the first waterproof member 500, the key switch 200 located on the side of the second surface 120 of the bracket 100 is in the bracket The sealed space formed by 100 is not easily corroded by moisture, so that a waterproof fingerprint module with a sealed space is formed on the terminal housing 800, so as to realize the waterproof function of the side-mounted fingerprint module. At the same time, the key function can be realized through the key switch 200 of the fingerprint module.

It should be noted that the second waterproof member 600 can also be installed on the fingerprint recognition module 400, so as to realize the waterproof function of the fingerprint recognition module 400 itself. Moisture corrodes toward the position where the fingerprint recognition chip 410 and the first FPC 420 are electrically connected to each other. The first waterproof part 500 and the second waterproof part 600 can be realized by dispensing glue, or by setting a waterproof rubber ring. One side of the second surface 120 of the second surface 120 forms a sealed space, and the key switch 200 is located in the sealed space, and there is no need to dispense glue on the key switch 200 to realize the sealing of the key switch 200, so that there will be no fingerprint mold in some cases. When dispensing glue to the key switch 200, the glue climbs to the top of the key switch 200 and the function of the key switch 200 is damaged.

Since the waterproof fingerprint module in some cases needs to apply sealing glue on the mating surface of the bracket 100 and the terminal housing 800, to realize the waterproof function of the key switch 200 in the bracket 100, so although it can play a waterproof role, but in It cannot be reused after disassembly, which is easy to cause waste. However, in some embodiments of the present application, the sealant 300 forms an abutting contact between the bracket 100 and the terminal housing 800 to achieve a sealing effect. Therefore, after the waterproof fingerprint module is removed, it can be reused, thereby saving cost. At the same time, this sealing method is different from the adhesive layer sealing and requires a larger sealing width, so it can save the installation space of the fingerprint module and is conducive to the miniaturization of the product, especially the thickness of the whole machine can be reduced.

In addition, compared with the combination of soft and hard boards in some cases, "set the fingerprint identification chip 410 on the substrate, and then electrically connect the substrate to the circuit board where the main key switch is located through the FPC and the board-to-board connector". Design scheme, the above-mentioned fingerprint recognition chip 410 is directly pasted on the ordinary FPC, and it is not necessary to set the fingerprint recognition chip 410 with a soft-hard board, which can effectively reduce the process cost, ensure the product yield, and can replace some cases by FPC The connection form of the lower connector further saves cost and installation space.

Wherein, in order to install the waterproof fingerprint module on the terminal housing 800 conveniently and remove the waterproof fingerprint module from the terminal housing 800, the bracket 100 may include a main body 140 and a fixing part 150, the main body 140 has a second The first surface 110 and the second surface 120, the main body 140 is used to realize the fixing of the fingerprint recognition component 400 and the key switch 200, and the fixing part 150 is arranged at both ends of the main body 140, and the terminal housing is realized through the fixing part 150 The detachable connection between 800, this detachable connection may be but not limited to a buckle connection, a magnet adsorption connection or a fastener connection and the like.

In some embodiments, in order to realize the installation and disassembly of the waterproof fingerprint module more conveniently without affecting the sealing performance of the sealing member 300, an annular ring for fitting the terminal housing 800 can be provided on the sealing member 300. The first protrusion 320 , wherein the first protrusion 320 surrounds the orthographic projection of the first FPC 420 on the seal 300 . In this way, when the waterproof fingerprint module is installed on the terminal housing 800, only the first protrusion 320 on the sealing member 300 is attached to the terminal housing 800, and the distance between the bracket 100 and the terminal housing 800 can be achieved Sealing effect, thereby reducing the contact area between the seal 300 and the terminal housing 800, it is convenient to install the waterproof fingerprint module on the terminal housing 800, and it is also convenient to remove the waterproof fingerprint module from the terminal housing 800 remove. The sealing member 300 can be realized by elastically deformable structures such as soft rubber and sealing rings.

The first protrusion 320 serves as the contact part between the sealing member 300 and the terminal housing 800, and the difference in the setting position will affect the sealing effect of the waterproof fingerprint assembly. A stepped structure is formed between the parts 150, so that the main body part 140 includes a side wall surface 141 bent and extended from the edge of the first surface 110 toward the second surface 120 and connected with the fixing part 150, so that the sealing member 300 extends from the second surface of the main part 140 A surface 110 extends to the side wall 141 of the main body 140 , and the first protrusion 320 is disposed on a portion of the seal 300 extending to the side wall 141 . In this way, when the waterproof fingerprint module is installed on the terminal housing 800, it will not interfere with the assembly between the fingerprint recognition component 400 and the terminal housing 800, thereby ensuring that the first protrusion 320 on the sealing member 300 can It is completely attached to the terminal housing 800 to ensure the sealing effect after the waterproof fingerprint module is installed on the terminal housing 800 .

As shown in FIG. 2 , in addition to being provided with the first protrusion 320 , the sealing member 300 can also be provided on the part of the first surface 110 facing the first FPC 420 and distributed on both sides of the through hole 310 of the sealing member. The second protrusion 330, in this way, when the fingerprint identification component 400 is pressed, it can avoid the seesaw effect when the two ends of the fingerprint identification component 400 are pressed, that is, when one end of the fingerprint identification component 400 is pressed, only one end is pressed. The downward movement occurs, so that the pressing effect cannot be transmitted to the key switch 200, resulting in failure of the key function of the key switch 200. In some embodiments, the number of the second protrusions 330 may be two, and the two second protrusions 330 are symmetrically distributed on both sides of the through hole 310 of the sealing member. In order to better avoid malfunction of the key switch 200 , the second protrusion 330 can be positioned close to the edge of the fingerprint identification chip 410 of the fingerprint identification component 400 .

It should be noted that the waterproof fingerprint module not only needs to ensure the sealing effect on the side of the second surface 120 of the bracket 100, but also needs to enable the pressing of the fingerprint identification chip 410 to be transmitted to the key switch 200, so that it can perform fingerprint identification. At the same time, it does not affect the normal use of the key switch 200 on the terminal. In some embodiments, by setting the conductive pillar 700, when the fingerprint recognition chip 410 is pressed, the pressing effect can be transmitted to the key switch 200 through the seal 300 and the conductive pillar 700, thereby triggering the state switching of the key switch 200 . The main body part 140 is provided with a relief hole 142 that passes through the main body part 140 and extends from the first surface 110 to the second surface 120. The key switch 200 includes a switch 210 and a second FPC220. The switch 210 is attached to the second FPC220. The second FPC220 is arranged on the side of the second surface 120 of the bracket 100, and the switch 210 is located on the side of the second FPC220 close to the relief hole 142; The hole 142, the end of the conductive column 700 is set close to the switch 210, the sealing member 300 is provided with a protrusion 340 extending from the sealing member 300 to the direction away from the first surface 110 of the bracket 100, when the fingerprint identification chip 410 is pressed, The first FPC 420 transmits the pressing action to the protruding portion 340 on the sealing member 300. Since the sealing member 300 is elastic, the protruding portion 340 will be deformed under the extrusion of the fingerprint recognition component 400, and the protruding portion 340 The deformation will drive the conductive column 700 to move, so that the conductive column 700 will press the switch 210 , so as to switch the state of the switch 210 . The arrangement of the conductive pillar 700 can avoid the phenomenon that the seal 300 is prone to fatigue damage when the seal 300 is directly used to press the key switch 200 .

Wherein, in order to realize the connection between the sealing member 300 and the conductive post 700 conveniently, and to ensure the connection effect between the sealing member 300 and the conductive post 700, it is possible to set a place on the protruding part 340 of the sealing member 300 with the bracket 100 The conductive post through hole 350 connected to the hole 142, the end of the conductive post 700 away from the switch 210 is pierced in the conductive post through hole 350 on the sealing member 300, so that through the conductive post through hole 350 on the sealing member 300, it is convenient to insert The conductive post 700 is assembled on the sealing member 300 , and the contact area between the conductive post 700 and the sealing member 300 can be increased to ensure the connection effect between the conductive post 700 and the sealing member 300 .

It should be noted that the bracket 100 , the sealing member 300 and the conductive post 700 can be integrally formed to ensure the sealing effect between the sealing member 300 and the bracket 100 and the sealing member 300 and the conductive post 700 .

However, in some other embodiments, the conductive post through hole 350 may not be provided on the sealing member 300 . The sealing member 300 can cover the conductive column through hole 350, and the end of the conductive column 700 away from the switch 210 abuts and is fixed on the sealing member 300 (fixed in the area of the sealing member 300 facing the relief hole 142), so that there is no need to The conductive column through hole 350 is provided on the sealing member 300 , so that the conductive column 700 can transmit the pressing effect on the fingerprint recognition chip 410 to the switch 210 without affecting the sealing performance of the sealing member 300 itself.

The key switch 200 can be installed on the bracket 100 by fasteners such as screws 900, and a plurality of threaded holes 143 with openings facing the side of the second surface 120 can be set on the main body portion 140 of the bracket 100. The key switch 200 passes through the second surface 120. The FPC 220 and the screw 900 screwed into the threaded hole 143 are fixed on the main body 140 of the bracket 100 to realize the detachable connection between the key switch 200 and the bracket 100 .

In addition, in order to ensure that the switch 210 can accurately enter the area where the relief hole 142 on the bracket 100 is located when the key switch 200 is installed on the bracket 100 , a plurality of second surface 120 to the positioning column 144 extending away from the main body 140, the second FPC 220 is provided with a plurality of positioning holes 221 corresponding to the positioning columns 144 one-to-one, and the plurality of positioning columns 144 pass through the corresponding positioning holes 221 respectively. In this way, The setting of the positioning column 144 and the positioning hole 221 plays a positioning role when the key switch 200 is installed.

In some embodiments, the bracket 100 can also be fixed to the terminal housing 800 using fasteners such as screws 900, and a plurality of nail holes 151 penetrating through the fixing portion 150 can be provided on the fixing portion 150 of the bracket 100. The bracket 100 The fixing part 150 can be fixed on the terminal housing 800 via the screw 900 passing through the nail hole 151 and screwed on the terminal housing 800, so as to facilitate the detachable connection between the waterproof fingerprint module and the terminal housing 800 .

In order to increase the rigidity of the first FPC420 and the second FPC220, a reinforcement plate 430 can be set on the side of the first FPC420 away from the fingerprint recognition chip 410, and a reinforcement plate 230 can be set on the side of the second FPC220 away from the switch 210, so as to facilitate the installation of the second FPC220. One FPC420 is fixed to the terminal housing 800 , and the second FPC220 is fixed to the bracket 100 .

As shown in Figures 3 to 5, before the above-mentioned waterproof fingerprint module is actually installed on the terminal device, the bracket 100, the sealing member 400 and the conductive column 700 adopt an integrated structure, and the first FPC420 in the fingerprint recognition component passes through the sealing member in sequence The seal through hole 310 of 300 and the bracket through hole 130 of the bracket 100, the key switch 200 is fixed to the side of the second surface 120 of the bracket 100 by screws 900 to form a side-mounted fingerprint module. When the side-mounted fingerprint module is installed on the terminal housing 800 of the terminal device, it is fixed by screw 900 type fasteners, wherein, the terminal housing 800 is designed with a button opening 810, and at the same time, the terminal housing 800 One side of the inner wall surface 820 is designed with a threaded hole for fixing 900 type fasteners. The nail passing hole 151 of the bracket 100 is facing the threaded hole on the terminal housing 800, and the first FPC420 of the fingerprint identification component is attached to the Close to the inner wall surface 820 of the terminal housing to prevent the fingerprint recognition component from protruding from the key opening 810 of the terminal housing 800, while the fingerprint identification chip 410 is exposed outside the key opening 810 of the terminal housing 800 to detect fingerprints. At the same time, the first protrusion 320 of the sealing member 300 is attached to the terminal housing 800 to achieve a sealing effect between the bracket 100 and the terminal housing 800 to realize the waterproof function of the side fingerprint module.

Some embodiments of the present application provide a terminal, including a terminal housing 800 and a waterproof fingerprint module, wherein the terminal housing 800 has a button opening 810, the bracket 100 is detachably connected to the terminal housing 800, and the sealing member 300 is attached On the terminal housing 800 , the fingerprint identification component 400 passes through the button opening 810 and is exposed to the outside of the terminal housing 800 .

In fact, the waterproof fingerprint module included in the terminal provided by some embodiments of the present application is the same as the waterproof fingerprint module provided by some of the above-mentioned embodiments, so the terminal provided by this embodiment also has the waterproof fingerprint module provided by some of the above-mentioned embodiments. Group the same technical effect.

Those of ordinary skill in the art can understand that the above-mentioned implementation modes are specific examples for realizing the present application, and in practical applications, various changes can be made to it in form and details without departing from the spirit and spirit of the present application. scope.

Claims

A waterproof fingerprint module, used to be arranged on a terminal housing (800) to sense fingerprints, comprising:

A bracket (100), having a first surface (110) and a second surface (120) disposed opposite to each other, the bracket (100) is provided with a a bracket through hole (130) extending to said second surface (120);

a key switch (200), the key switch (200) is arranged on one side of the second surface (120);

A sealing member (300), arranged on the first surface (110) and used to fit the terminal housing (800), the sealing member (300) has a sealing member communicating with the bracket through hole (130) hole(310);

A fingerprint recognition component (400), the fingerprint recognition component (400) includes a fingerprint recognition chip (410) and a first FPC (420), and the fingerprint recognition chip (410) is pasted on the first FPC (420) , the first FPC (420) is arranged above the seal (300), and one end of the first FPC (420) passes through the seal through hole (310) and the bracket through hole ( 130), and extend to the second surface (120) side;

The fingerprint identification component (400) is used to expose to the outside of the terminal housing (800) through the key opening (810) of the terminal housing (800), so as to detect fingerprints when touched;

The first waterproof member (500) is arranged in the bracket through hole (130) and seals the gap between the first FPC (420) and the wall of the bracket through hole (130).
The waterproof fingerprint module according to claim 1, wherein: the bracket (100) includes a main body (140) having the first surface (110) and the second surface (120), and is located on the The fixing parts (150) at both ends of the main body part (140), the fixing parts (150) are used for detachable connection with the terminal housing (800).
The waterproof fingerprint module according to claim 2, wherein: the sealing member (300) is provided with a ring-shaped first protrusion (320) for fitting the terminal housing (800), and the first protrusion A riser (320) surrounds the orthographic projection of the first FPC (420) on the seal (300).
The waterproof fingerprint module according to claim 3, wherein: the main body (140) includes a bend extending from the edge of the first surface (110) toward the second surface (120), and is fixed to the part (150) of the side wall surface (141), the seal (300) extends from the first surface (110) to the side wall surface (141), and the first protrusion (320) is arranged on The sealing member (300) extends to a portion of the side wall surface (141).
The waterproof fingerprint module according to any one of claims 1 to 4, wherein: the part of the seal (300) located on the first surface (110) is provided with a seal facing the first FPC (420) , and a plurality of second protrusions (330) distributed on both sides of the seal through hole (310).
The waterproof fingerprint module according to claim 2, wherein: further comprising a conductive column (700); the main body (140) is provided with a conductive column that passes through the main body (140) and extends from the first surface (110). ) extends to the relief hole (142) of the second surface (120); the key switch (200) includes a switch (210) and a second FPC (220), and the switch (210) is attached to the On the second FPC (220), the second FPC (220) is arranged on one side of the second surface (120), and the switch (210) is located near the second FPC (220) One side of the hole (142); the conductive post (700) is arranged on the seal (300) and passes through the relief hole (142), and the end of the conductive post (700) is close to the The switch (210) is set; the seal (300) is provided with a protrusion (340) extending from the seal (300) in a direction away from the first surface (110); the fingerprint recognition chip (410) presses the switch (210) through the protrusion (340) and the conductive post (700) when pressed.
The waterproof fingerprint module according to claim 6, wherein: the protrusion (340) is provided with a conductive post hole (350) communicating with the relief hole (142), and the conductive post (700) The end away from the switch (210) is passed through the through hole (350) of the conductive column.
The waterproof fingerprint module according to claim 6, wherein: the end of the conductive column (700) away from the switch (210) abuts on the sealing member (300).
The waterproof fingerprint module according to claim 2, wherein: the main body (140) is provided with a plurality of threaded holes (143) with openings facing the side of the second surface (120), and the key switch ( 200) is fixed on the main body (140) via a screw (900) passing through the second FPC (220) and screwed into the threaded hole (143).
The waterproof fingerprint module according to claim 9, wherein: the main body (140) is provided with a plurality of positioning posts extending from the second surface (120) in a direction away from the main body (140) (144), the second FPC (220) is provided with a plurality of positioning holes (221) corresponding to the positioning posts (144), and the plurality of positioning posts (144) pass through the corresponding positioning posts (144) respectively. The above positioning hole (221).
The waterproof fingerprint module according to claim 2, wherein: the fixing part (150) is provided with a plurality of nail holes (151) passing through the fixing part (150), and the fixing part (150) passes through The screw (900) passing through the nail passing hole (151) and screwed on the terminal housing (800) is fixed on the terminal housing (800).
A terminal, comprising a terminal housing (800) and the waterproof fingerprint module according to any one of claims 1 to 11; the terminal housing (800) has key openings (810); the bracket (100) It is detachably connected with the terminal housing (800); the seal (300) is attached to the terminal housing (800); the fingerprint identification component (400) passes through the button opening (810) ) and exposed to the outside of the terminal housing (800).