CN207882920U - Fingerprint recognition button - Google Patents
Fingerprint recognition button Download PDFInfo
- Publication number
- CN207882920U CN207882920U CN201721765393.0U CN201721765393U CN207882920U CN 207882920 U CN207882920 U CN 207882920U CN 201721765393 U CN201721765393 U CN 201721765393U CN 207882920 U CN207882920 U CN 207882920U
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- CN
- China
- Prior art keywords
- fingerprint recognition
- pressure sensitive
- recognition chip
- button
- sensitive substrate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
A kind of fingerprint recognition button; fit including fingerprint recognition chip and with the fingerprint recognition chip and the panel to be protected to fingerprint recognition chip; the bottom of the fingerprint recognition chip is provided with pressure sensitive substrate; the pressure sensitive substrate is tablet; and pressure sensitive substrate both ends are connected with the fingerprint recognition chip insulation, and the middle part of pressure sensitive substrate is with the fingerprint recognition chip that there are gaps；It is additionally provided with the cushion made of elastic plastic material in the pressure sensitive base plate bottom, the area of the cushion is less than the surface area of the pressure sensitive substrate；The fingerprint recognition keystroke sensitivity of the utility model is high, and service life is long.
Description
Technical field
The utility model is related to a kind of electronic equipment bio-identification button, especially a kind of fingerprints to electronic equipment
Key range.
Background technology
In the electronic equipments such as mobile communication equipment, tablet computer, to enhance the security performance of electronic equipment, user is prevented
Relevant information leak, part manufacturer utilizes optics, acoustics, biosensor and biostatistics principle, and according to human body
The uniqueness of the features such as intrinsic physiological characteristic, such as face picture, iris, fingerprint is designed and developed and has provided human body bio-identification work(
Can electronic equipment bio-identification button, the electronic equipment of the type is with button by being carried out to the intrinsic physiological characteristic of human body
Identification verification has the advantages that securely and reliably etc. a variety of to decide whether to start the relative program of electronic equipment, and the type is pressed
The most commonly used in key is the button with fingerprint identification function.
Referring to Fig. 1, currently, common fingerprint recognition button includes fingerprint recognition chip 1 ' and to fingerprint recognition core
The panel 2 ' that piece 1 ' is protected, the panel 2 ' are affixed with the fingerprint recognition chip 1 ' and are integrated, and know in the fingerprint
It is provided with to perceive the inductive layer 11 ' of fingerprint signal at the surface that other chip 1 ' fits with panel 2 '；To use process
In, after pressing the button, after so that button is connected, and energy Rapid reset, in the bottom position of the fingerprint recognition chip 1 '
It is provided with the metallic elastic piece 3 ' of hemispherical shape (also known as:Metal dome)；When panel 2 ' is by extraneous pressure, the metal elastic
Property piece 3 ' bottom be pressurized and generate deformation and be connected in the circuit of fingerprint recognition chip 1 ' in setting, and then make fingerprint recognition core
Piece 1 ' receives enabled instruction and program is connected in start button, when the extraneous pressure on being applied to panel 2 ' disappears, the metal elastic
Property piece 3 ' deformation of bottom restore, panel 2 ' and fingerprint recognition chip 1 ' are replied immediately soon under the elastic force effect of metallic elastic piece 3 '
Position；It is the bottom by metallic elastic piece 3 ' from the above press-key structure it is found that the fingerprint recognition button of the traditional structure is in conducting
Portion and the circuit of fingerprint recognition chip are connected, such as to panel 2 ' apply pressure it is inadequate, 3 ' deformation of bottom amount of metallic elastic piece compared with
Hour, button is difficult to play a role, and therefore, the keystroke sensitivity of this kind of structure is relatively low；In addition, because of the conducting and reset of button
It is to deform and carry out under pressure by the bottom of metallic elastic piece 3 ', after being used for multiple times, metallic elastic piece
3 ' bottoms are also easy to produce mechanical deformation after multiple flexible deformation, and the effect of following the string or spring function reduction, and make
Entire button loses conducting or reset function, and then entire button generates damage；Therefore, to overcome the said goods, there are the technologies
Defect, it is necessary to which the fingerprint recognition press-key structure is improved.
Invention content
The technical problem to be solved by the present invention is to provide a kind of fingerprint recognition buttons, and the fingerprint recognition button is to pressure
Induction sensitivity is high, and even if after long-time use, is also not likely to produce damage.
In order to solve the above technical problems, the utility model uses following technical proposals：The fingerprint recognition button includes fingerprint
Identification chip and fit with the fingerprint recognition chip and the panel to be protected to fingerprint recognition chip, described
The bottom of fingerprint recognition chip is provided with pressure sensitive substrate, and the pressure sensitive substrate is tablet, and the pressure sensitive base
Between plate both ends are connected with the fingerprint recognition chip insulation, and the middle part of pressure sensitive substrate and the fingerprint recognition chip exist
Gap；It is additionally provided with the cushion made of elastic plastic material, the area of the cushion in the pressure sensitive base plate bottom
Less than the surface area of the pressure sensitive substrate.
Design concept according to the present utility model, the pressure sensitive substrate include insulation board and are arranged in insulation board table
Face and resistance value can generate the conducting wire of variation with the deformation of the insulation board.
Design concept according to the present utility model, the gap at pressure sensitive the substrate middle part and the fingerprint recognition chip
It is less than 200um more than 1um.
Design concept according to the present utility model, the fingerprint recognition chip are flexible PCB.
Design concept according to the present utility model is also set on the surface that the fingerprint recognition chip fits with the panel
It is equipped with to perceive the inductive layer of somatic fingerprint signal.
Compared with prior art, the utility model has following advantageous effects：（1）Due to the fingerprint recognition of the utility model
Chip bottom is provided with pressure sensitive substrate, and cushion is additionally provided in pressure sensitive base plate bottom, which is moulded by elasticity
Made by glue material, when the panel of button is by external pressure, cushion external pressure effect under, generate deformation and to pressure
Power incudes substrate and applies pressure, and pressure sensitive substrate generates micro-strain, and related pressure inductive signal is sent to fingerprint and is known
Other chip, and keep button in the conduction state, sensitivity is very high；When external pressure disappears, cushion deformation restores, panel
With fingerprint recognition chip under the elastic force effect of the cushion, Rapid reset；（2）Due to the pressure sensitive base of the utility model
Plate includes insulation board and the conducting wire in insulation plate surface is arranged, and therefore, the pressure sensitive board structure is simple, reliability
It is good；（3）Because the reset of the panel and fingerprint recognition chip of the utility model button be completed by the elastic deformation of cushion, and
Cushion is made of elastic rubber material, and compared with traditional metallic elastic piece, simple in structure, reliability is preferable, makes
Use long lifespan.
Description of the drawings
Fig. 1 is the schematic cross-sectional view of conventional fingerprint key range；
Fig. 2 is the schematic cross-sectional view of fingerprint recognition case in the utility model, and pressure sensitive base is shown in the figure
Plate generates structure when miniature deformation.
Specific implementation mode
Fingerprint recognition button described in the utility model, mainly for conventional fingerprint key range pressure sensitive sensitivity
It is low, service life is short and the improvement made.
Referring to Fig. 2, the fingerprint recognition button of the utility model includes fingerprint recognition chip 1 and panel 2, the panel 2
It fits with the fingerprint recognition chip 1, which protects fingerprint recognition chip 1 while to fingerprinting operation face
Shield.
In the utility model, used fingerprint recognition chip 1 is preferably flexible PCB, certain hardboard or soft or hard combination
Plate can also be alternatively；2 material of the panel can be the materials such as ceramics or glass, between fingerprint recognition chip 1 and panel 2
It is provided with organic bonding layer 3, adhesive linkage 3 is bonding is integrated by this for fingerprint recognition chip 1 and panel 2；In fingerprint recognition core
Piece 1 is additionally provided with inductive layer 4 with the surface that the panel 2 fits；When human body is from panel 2 described in external touch, the induction
Layer 4 is perceiving somatic fingerprint signal.
For improve the utility model button sensitivity, the utility model sets in the bottom of the fingerprint recognition chip 1
Pressure sensitive substrate 5 is set, in the bottom of fingerprint recognition chip 1 setting pressure sensitive substrate 5, first, makes the pressure sensitive base
5 both ends of plate are connected with the fingerprint recognition chip 1 insulation, and make middle part and the fingerprint recognition chip 1 of pressure sensitive substrate 5
There are gap, which is less than 200um more than 1um；When using the button, panel 2 is by external pressure, pressure sensitive base
Plate 5 generates micro-strain under external force, and related pressure inductive signal is sent to fingerprint recognition chip 1, and makes button
In the conduction state, therefore, sensitivity is very high.
The pressure sensitive substrate 5 of the utility model includes insulation board and conducting wire, wherein conducting wire setting is being insulated
Plate surface, and the resistance value of conducting wire can generate variation with the deformation of the insulation board；When insulation board produces under external force
When miniature deformation, the resistance value of conducting wire generates variation, and relevant change in resistance signal is sent to fingerprint recognition chip 1,
And keep button in the conduction state.
To make button after the external pressure applied by human body, can Rapid reset, the utility model it is described absolutely
The bottom of listrium is additionally provided with cushion 6, and the area of the cushion 6 is less than the surface area of the insulation board, and cushion 6 by
Elastic plastic material is made；When the panel 2 of button is by external pressure, cushion 6 generate deformation and to elastic extruding insulation
Plate, makes the insulation board generate micro-strain, and insulation board deforms and the resistance value of the conducting wire positioned at its surface is caused to generate change
Change, when fingerprint recognition chip 1 receives the signal of the change in resistance of conducting wire, controls the fingerprint button conducting, pressed in outside
When power disappears, when 6 deformation of cushion restores, panel 2 and fingerprint recognition chip 1 are under the elastic force effect of the cushion, quickly
It resets.
Claims (5)
1. a kind of fingerprint recognition button, including fingerprint recognition chip and with the fingerprint recognition chip fit and to referring to
The panel that line identification chip is protected, which is characterized in that the bottom of the fingerprint recognition chip is provided with pressure sensitive base
Plate, the pressure sensitive substrate is tablet, and pressure sensitive substrate both ends are connected with the fingerprint recognition chip insulation, and
There are gaps with the fingerprint recognition chip at the middle part of pressure sensitive substrate；The pressure sensitive base plate bottom be additionally provided with by
Cushion made of elastic plastic material, the area of the cushion are less than the surface area of the pressure sensitive substrate.
2. fingerprint recognition button as described in claim 1, which is characterized in that the pressure sensitive substrate include insulation board and
The conducting wire of variation can be generated in insulation plate surface and resistance value with the deformation of the insulation board by being arranged.
3. fingerprint recognition button as claimed in claim 1 or 2, which is characterized in that in the middle part of the pressure sensitive substrate with it is described
The gap of fingerprint recognition chip is less than 200um more than 1um.
4. fingerprint recognition button as claimed in claim 3, which is characterized in that the fingerprint recognition chip is flexible PCB.
5. fingerprint recognition button as claimed in claim 3, which is characterized in that in the fingerprint recognition chip and the panel phase
The surface of fitting is additionally provided with to perceive the inductive layer of somatic fingerprint signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721765393.0U CN207882920U (en) | 2017-12-14 | 2017-12-14 | Fingerprint recognition button |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721765393.0U CN207882920U (en) | 2017-12-14 | 2017-12-14 | Fingerprint recognition button |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207882920U true CN207882920U (en) | 2018-09-18 |
Family
ID=63502362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721765393.0U Active CN207882920U (en) | 2017-12-14 | 2017-12-14 | Fingerprint recognition button |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207882920U (en) |
-
2017
- 2017-12-14 CN CN201721765393.0U patent/CN207882920U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |