CN109905114A - Touch controlled key and terminal - Google Patents
Touch controlled key and terminal Download PDFInfo
- Publication number
- CN109905114A CN109905114A CN201910242047.1A CN201910242047A CN109905114A CN 109905114 A CN109905114 A CN 109905114A CN 201910242047 A CN201910242047 A CN 201910242047A CN 109905114 A CN109905114 A CN 109905114A
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- China
- Prior art keywords
- touch
- key
- pcb board
- led light
- loophole
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Abstract
The present invention discloses a kind of touch controlled key and terminal, wherein, touch controlled key includes pcb board, the front of the pcb board is provided at least one Touch control key, the pcb board is provided with the first loophole through the pcb board, the Touch control key, which is equipped with, runs through corresponding second loophole with first loophole, and the back side of the pcb board is provided with LED light group corresponding with first loophole；Control circuit is additionally provided on the pcb board, the Touch control key is connect by control circuit with LED light group；The front of the pcb board is covered with touch cover board, and the touch cover board covers the Touch control key and is formed with gap between Touch control key, and the touch cover board includes that finger corresponding with the Touch control key touches position.While technical solution of the present invention is intended to simplify key manufacturing process and reduces cost of manufacture, the safety of key is improved, and improves the technology sense and aesthetic feeling when key is applied to end product.
Description
Technical field
The present invention relates to technical field of key, in particular to a kind of touch controlled key and terminal.
Background technique
There is the lamp group of light efficiency effect to work for the applications keys control of the terminals such as current speaker, TV, be to pass through application
Key realizes the control to lamp group using mechanical abutting arrangement, or applications keys are arranged to induction electrode, induction electrode
It is connect with lamp group, control of the applications keys realization to lamp group is touched by finger, but the applications keys of mechanical abutting arrangement need
It to be realized and be abutted using telescopic spring, this applications keys are in production, not only complex manufacturing technology, and cost of manufacture height.And
Although the applications keys of induction electrode formula reduce the degree of complex process, but safety is lower；And the application of two kinds of structures
When key is applied to end product, the technology sense and aesthetic feeling of end product embody lower.
Summary of the invention
The main object of the present invention is to provide a kind of touch controlled key, it is intended to simplify key manufacturing process and reduce cost of manufacture
While, the safety of key is improved, and improve the technology sense and aesthetic feeling when key is applied to end product.
To achieve the above object, touch controlled key proposed by the present invention,
Including pcb board, the front of the pcb board is provided at least one Touch control key, and the pcb board is provided with through described
First loophole of pcb board, the Touch control key, which is equipped with, runs through corresponding second loophole, the PCB with first loophole
The back side of plate is provided with LED light group corresponding with first loophole；
Control circuit is additionally provided on the pcb board, the Touch control key is connect by control circuit with LED light group；
The front of the pcb board is covered with touch cover board, the touch cover board cover the Touch control key and with Touch control key it
Between be formed with gap, the touch cover board includes that finger corresponding with the Touch control key touches position.
Preferably, the Touch control key is the positive copper foil for being laid in the pcb board.
Preferably, the front of the pcb board is equipped with the groove for accommodating the Touch control key.
Preferably, the front of the pcb board is additionally provided with supporting element, and the top that the touch cover board is set to supporting element is flat
Face.
Preferably, the LED light group includes at least one LED light, LED light include monochromatic LED lamp, dual-colored LED lamp and/or
Three-color LED light.
Preferably, the touch cover board is made for transparent insulation material.
Preferably, third loophole is provided on the touch cover board.
Preferably, the control circuit includes control chip and peripheral circuit, the control chip by peripheral circuit and
Power supply connection, the touch controlled key are connect by controlling chip with LED light group.
Preferably, the model SC93F8333 of the control chip.
The present invention also proposes a kind of terminal, including touch controlled key as described above.
LED light group, PCB is arranged by the way that Touch control key is arranged in pcb board front, at the back side of pcb board in technical solution of the present invention
It is additionally provided with control circuit on plate, Touch control key is connect by control circuit with LED light group, and the of LED light group is provided on pcb board
One loophole, Touch control key, which is equipped with, runs through corresponding second loophole with first loophole, touches in the front covering of pcb board
Cover board touches cover board and covers the Touch control key, makes to be formed with gap between touch cover board and Touch control key, the internal structure letter of key
It is single, it is easy to manufacture, key manufacturing process is simplified, also reduction cost of manufacture.When the finger that finger touches cover board touches position, with phase
Corresponding Touch control key carries out inductance capacitance coupling, and the capacitor of Touch control key changes, and control circuit detects the capacitor of Touch control key
After changing, control LED light group work realizes across the unlatching for touching cover board touch-control LED light group, does not need directly to touch
Touch control key, improves the safety of key, and when key is applied to end product, improves the technology sense and beauty of end product
Sense.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of touch controlled key of the present invention；
Fig. 2 is the structural schematic diagram of another embodiment of touch controlled key of the present invention；
Fig. 3 is the electric operation control circuit figure of touch controlled key of the present invention；
Fig. 4 is touch controlled key working principle diagram of the present invention.
Drawing reference numeral explanation:
1, pcb board, 2, Touch control key, 3, LED light group, the 4, first loophole, 5, touch cover board, 6, supporting element, 7, periphery electricity
Road, 8, control chip, the 9, second loophole, 10, groove.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described further with regard to technical solution of the present invention.It should be appreciated that this
Locate described specific embodiment to be only used to explain the present invention, be not intended to limit the present invention.
The present invention proposes a kind of touch controlled key.
It is the structural schematic diagram of one embodiment of touch controlled key of the present invention referring to figs. 1 to 4, Fig. 1；Fig. 2 is that touch-control of the present invention is pressed
The structural schematic diagram of another embodiment of key；Fig. 3 is the electric operation control circuit figure of touch controlled key of the present invention；Fig. 4 is touch controlled key of the present invention
Working principle diagram.
In embodiments of the present invention, the front of the touch controlled key, including pcb board 1, the pcb board 1 is provided at least one
Touch control key 2, the pcb board 1 are provided with the first loophole 4 through the pcb board 1, and the Touch control key 2 is equipped with and described first
Loophole 4 runs through corresponding second loophole 9, and the back side of the pcb board 1 is provided with LED corresponding with first loophole 4
Lamp group 3；
Control circuit is additionally provided on the pcb board 1, the Touch control key 2 is connect by control circuit with LED light group 3；
The front of the pcb board 1, which is covered with, touches cover board 5, and the touch cover board 5 covers the Touch control key 2 and and touch-control
Gap is formed between key 2, the touch cover board 5 includes that finger corresponding with 2 key of touch-control touches position.
When the finger that finger touches touch cover board 5 touches position, corresponding finger touches to be led between the Touch control key 2 and finger of position
The air crossed in gap carries out inductance capacitance coupling as medium, and Touch control key 2 senses finger inductance capacitance, makes Touch control key 2
Capacitor changes, and after control circuit detects that the capacitor of Touch control key 2 changes, controls the unlatching of LED light group 3；Such as Fig. 1 and
Shown in Fig. 2.
By using in 1 front setting Touch control key 2 of pcb board, Touch control key 2 can be round, rectangular technical solution of the present invention
Or other shapes.LED light group 3 is set at the back side of pcb board 1, control circuit is additionally provided on pcb board 1, Touch control key 2 is logical
Cross the first loophole 4 that LED light group 3 is provided on control circuit and 3 connecting PCB board 1 of LED light group, Touch control key 2 be equipped with it is described
First loophole 4 runs through corresponding second loophole 9, it is to be understood that in one embodiment, the second loophole 9 and the
The pore size of one loophole 4 can be identical, and the aperture of the first loophole 4 is less than the second loophole 9 in another embodiment
Aperture.
Cover board 5 is touched in the front covering of pcb board 1, cover board 5 is touched and covers the Touch control key 2, makes to touch cover board 5 and touching
Gap is formed between control key 2, the finger touch position for touching cover board 5 is corresponding with Touch control key 2, and touch key-press does not have mechanical realization,
Internal structure is simply easy to manufacture, simplifies key manufacturing process, also reduction cost of manufacture.
When the finger that finger touches cover board 5 touches position, inductance capacitance coupling is carried out with corresponding Touch control key 2,
The capacitor of Touch control key 2 changes, and after control circuit detects that the capacitor of Touch control key 2 changes, control LED light group 3 works,
It realizes across the opening and closing for touching 5 touch-control LED light group 3 of cover board, does not need directly to touch Touch control key 2, improve key
Safety, and the front of pcb board 1 is arranged in Touch control key 2, and it is corresponding to touch position with the finger of Trackpad, improves and touches every sky
The sensitivity of control, at the same key be applied to end product when, improve the technology sense and aesthetic feeling of end product.
Further, the Touch control key 2 is the positive copper foil being laid on the pcb board 1.
All there is inductance capacitances between the object of any two conduction, and in one embodiment, pad is arranged in pcb board 1,
Copper foil is laid on pad and makes Touch control key 2, and the electric conductivity of copper is high, and the ductility of copper foil is high, easy processing molding.One touch-control
Key 2 be a laying copper foil pad easily with greatly also may make up an inductance capacitance, the induced electricity that pcb board 1 and the earth are constituted
Hold, in the case where ambient enviroment is constant, the summation of above-mentioned two inductance capacitance is fixed and invariable small value.When there is human body hand
When referring to close to membrane keyboard, the inductance capacitance that human finger and the earth are constituted carries out induced electricity as medium by the air in gap
Hold coupling, the inductance capacitance that the inductance capacitance and pcb board 1 and the earth that the pad and the earth of parallel connection laying copper foil are constituted are constituted, meeting
Increase total induced electricity capacitance.Control circuit will export certain after the induced electricity capacitance for detecting some Touch control key 2 changes
The determination signal that a Touch control key 2 is pressed, control circuit control LED light group 3 and open work.In one embodiment, Touch control key 2
It can be the conductions such as the sheet metal that other types of conductors are laid on pad, conductive sponge, electrically conductive ink, conductive rubber, electro-conductive glass
Material.
Further, the front of the pcb board 1 is equipped with the groove 10 for accommodating the Touch control key 2.As shown in Figure 1.
In one embodiment, the front of pcb board 1 is equipped with groove 10, and the Touch control key 2 can be accommodated in groove, touches lid
Plate 5 covers the front of pcb board 1, does not interspace between pcb board 1, touches cover board 5 and covers the Touch control key 2 and pass through groove
Gap is formed between 10 and Touch control key 2, in embodiment, groove 10 may include circular groove, square groove or other
The groove 10 of shape, is arranged pad in groove, and copper foil is laid on the pad in groove and forms Touch control key 2, copper foil can wrap
Include: the other shapes of copper foil such as round copper foil, rectangular copper foil makes to be formed with gap between touch cover board 5 and Touch control key 2, realize
Corresponding finger touches the Touch control key 2 of position, carries out inductance capacitance as medium by the air in gap between finger and couples, and
The finger touch position that Touch control key 2 is set to the front of pcb board 1 and finger touches cover board 5 is just corresponding, improves key every empty touch-control
Sensitivity.
Further, the front of the pcb board 1 is additionally provided with supporting element 6, and the touch cover board 5 is set to supporting element 6
Plane is pushed up, as shown in Figure 2.
In another embodiment, the position except Touch control key 2 is set in pcb board 1 and supporting element 6 is set, touch cover board 5 and be arranged
Copper foil is laid on pad and is fabricated to Touch control key 2, supporting element in the front setting pad of pcb board 1 in the top plane of supporting element 6
6 supports, which touch cover boards 5 and make to touch, is formed with gap between cover board 5 and Touch control key, realize corresponding finger touch the Touch control key 2 of position with
Inductance capacitance coupling is carried out as medium by the air in gap between finger.
Further: the LED light group 3 includes at least one LED light, and LED light includes monochromatic LED lamp, dual-colored LED lamp
And/or three-color LED light.
In embodiment, LED light group 3 may include a LED light, and two LED light or multiple LED light, LED light include
Multiple LED light are combined to form different LED light groups 3 by monochromatic LED lamp, dual-colored LED lamp and/or three-color LED light, realize
Different light efficiencies increases the technology sense and aesthetic feeling of product.
Further, the touch cover board 5 is made for transparent insulation material.
In embodiment, touching cover board 5 selects transparent insulating materials to be made, transparent material energy light transmission,
Insulating materials is selected to improve the safety of key, transparent insulating materials can be glass, polystyrene, polychlorostyrene second
Alkene, plexiglas etc..
Further, third loophole (not shown go out) is provided on the touch cover board 5.
It touches and third loophole is set on cover board 5, in one embodiment, when the top that touch cover board 1 is placed in supporting element 6 is flat
When on face, third loophole can be set in any position for touching cover board 1, in another embodiment, Touch control key 2 is placed in recessed
When slot 10, third loophole can be set touching the position corresponding with groove 10 of cover board 5, be selected in touch cover board 5 opaque exhausted
When edge material, light transmission is carried out by third loophole.
Further, the control circuit includes control chip 8 and peripheral circuit 7, and the control chip 8 passes through periphery electricity
Road 7 connects to power supply, and the touch controlled key is connect by controlling chip 8 with LED light group 3, the model of the control chip 8
SC93F8333。
In embodiment, control circuit includes control chip 8 and peripheral circuit 7, control chip 8 by peripheral circuit 7 with
Power supply connection, touch controlled key can be connect by control chip 8 with LED light group 3, and control chip 8 can be SC93F8333, such as Fig. 3
Shown, peripheral circuit 7 may include first capacitor C18, the second capacitor C19, third capacitor C20, the 4th capacitor C21, the 5th electricity
Hold C22, the 6th capacitor C14, the 7th capacitor C15, first resistor R19, second resistance R20,3rd resistor R28, the 4th resistance
R27, the first LED light LED33, the second LED light LED34, the first of the first end of the first capacitor C18, the second capacitor C19
End, third capacitor C20 first end connect with the first end of the 4th capacitor C22, and connect the first power supply and control chip 8 VDD
End, first power supply connect fast plug CN4, and the first end of the 5th capacitor C22 and the end CMOD of control chip 8 connect
It connects, the second end of the first capacitor C18, the second end of the second capacitor C19, the second end of third capacitor C20, the 4th capacitor
The second end of C21 is connected with the second end of the 5th capacitor C22, and is met fast plug CN4 and controlled the end VSS of chip 8, described
Fast plug CN4 is also respectively connected with the second end of the second capacitor C19, controls the end TK21 of chip 8 and controls the TK20 of chip 8
End, the second end of the 5th capacitor C22 are also grounded；
First end, the first end of second resistance R20, the first end and the 4th of 3rd resistor R28 of the first resistor R19
The first end of resistance R27 connects and connects second source, and the second end of the first resistor R19 connects the of the first LED light LED33
The second end of one end, the LED light LED33 is connect with the end TK0 of control chip 8, the second end connection of the second resistance R20
The second end of the first end of second LED light LED34, LED light LED34 is connect with the end TK1 of control chip 8, the 3rd resistor
R28 second end is connect with the end TK5 of control chip 8, and the second end of the 4th resistance R27 is connect with the end TK8 of control chip 8, institute
The second end for stating 3rd resistor R28 is also connect with the first end of the 6th capacitor C14, the second end of the 4th resistance R27 also with
The first end of 7th capacitor C15 connects, and second end, the second end of the 7th capacitor C15 of the 6th capacitor C14 is connected and connect
Ground；
The end TK22 of the control chip 8 is connect with the first end of the 5th resistance R29, and the second end of the 5th resistance R29 is logical
It crosses the end KEY07 to connect with the first Touch control key 2, at least one Touch control key 2, other Touch control keys 2 and control core is provided on pcb board 1
The connection type of piece 8 and the first Touch control key 2 are identical as the control connection type of chip 8, and details are not described herein；
The end TK14 of the control chip 8 is connect by the 6th resistance R31 with the first end of LED light LED29, and chip is controlled
8 end TK15 is connect by the 7th resistance R32 with the first end of LED light LED28, and the end TK16 of control chip 8 passes through the 8th electricity
Resistance R33 is connect with the first end of LED light LED27, and the end TK17 of control chip 8 is by the 9th resistance R34 with LED light LED22's
First end connection, the control end chip 8TK18 are connect by the 9th resistance R35 with the first end of LED light LED21, the LED light
The second end of LED28, the second end of LED light LED27, the second end of LED light LED22, the second end and LED light of LED light LED21
The second end of LED29 connect and connect control chip 8 the end TK13, the LED light LED28, LED light LED27, LED light LED22,
LED light LED21 and LED light LED29 forms LED light group 3, the connection type of other LED light groups 3 and above-mentioned lamp group connection type
Identical, details are not described herein, it should be noted that 3 specific embodiment of LED light group shown in Fig. 3 described herein is only to solve
The present invention is released, is not intended to limit the present invention.
When no finger touch, capacitor is to lay inductance capacitance Cpx and pcb board 1 that the pad the earth of copper foil is constituted and big
The summation for the inductance capacitance Cpy that ground is constituted, when having finger when empty touch-control Touch control key, inductance capacitance Cf that finger and the earth are constituted
As medium carry out inductance capacitance coupling, parallel connection laying copper foil pad and the earth constitute inductance capacitance Cpx and pcb board 1 with
The inductance capacitance Cpy that the earth is constituted can be such that total induced electricity capacitance increases, as shown in figure 4, since two capacitors are in parallel, institutes
Before and after finger contact " key ", the change rate of total capacitance is C%={ (Cp+Cf)-Cp) }/Cp=Cf/Cp.This capacitor
Variation causes the variation of chip interior frequency of oscillation or charge and discharge time, and chip interior is made to be able to detect that touch, thus
Trigger signal is generated, control chip 8 controls LED light and opened and closed, and the change rate of capacitor is bigger, touches easier detection
It arrives.
The present invention also proposes a kind of terminal, which includes touch controlled key as described above, the specific knot of the touch controlled key
Structure is same to have since this touch controlled key uses whole technical solutions of above-mentioned all embodiments referring to above-described embodiment
There are all beneficial effects brought by the technical solution of above-described embodiment, this is no longer going to repeat them.
It it should be noted that the technical solution of each embodiment of the invention can be combined with each other, but must be with this
Based on the technical staff in field can be realized, when the combination of technical solution occur it is conflicting or when cannot achieve should people recognize
Combination for this technical solution is not present, also not the present invention claims protection scope within.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure transformation made by description of the invention and accompanying drawing content is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (10)
1. a kind of touch controlled key, which is characterized in that including pcb board, the front of the pcb board is provided at least one Touch control key,
The pcb board is provided with the first loophole through the pcb board, the Touch control key be equipped with first loophole through pair
The second loophole answered, the back side of the pcb board are provided with LED light group corresponding with first loophole；
Control circuit is additionally provided on the pcb board, the Touch control key is connect by control circuit with LED light group；
The front of the pcb board is covered with touch cover board, and the touch cover board covers the Touch control key and the shape between Touch control key
At there is gap, the touch cover board includes that finger corresponding with the Touch control key touches position.
2. touch controlled key as described in claim 1, which is characterized in that the Touch control key is the front for being laid in the pcb board
Copper foil.
3. touch controlled key as claimed in claim 2, which is characterized in that the front of the pcb board, which is equipped with, accommodates the Touch control key
Groove.
4. touch controlled key as claimed in claim 2, which is characterized in that the front of the pcb board is additionally provided with supporting element, described
Touch the top plane that cover board is set to supporting element.
5. touch controlled key according to any one of claims 1-4, which is characterized in that the LED light group includes at least one LED
Lamp, LED light include monochromatic LED lamp, dual-colored LED lamp and/or three-color LED light.
6. touch controlled key as claimed in claim 5, which is characterized in that the touch cover board be transparent insulation material make and
At.
7. touch controlled key as claimed in claim 6, which is characterized in that be provided with third loophole on the touch cover board.
8. touch controlled key as claimed in claim 7, which is characterized in that the control circuit includes control chip and periphery electricity
Road, the control chip are connected to power supply by peripheral circuit, and the touch controlled key is connect by controlling chip with LED light group.
9. touch controlled key as claimed in claim 8, which is characterized in that the model SC93F8333 of the control chip.
10. a kind of terminal, which is characterized in that including touch controlled key described in claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910242047.1A CN109905114A (en) | 2019-03-27 | 2019-03-27 | Touch controlled key and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910242047.1A CN109905114A (en) | 2019-03-27 | 2019-03-27 | Touch controlled key and terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109905114A true CN109905114A (en) | 2019-06-18 |
Family
ID=66953078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910242047.1A Pending CN109905114A (en) | 2019-03-27 | 2019-03-27 | Touch controlled key and terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109905114A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114390747A (en) * | 2020-10-16 | 2022-04-22 | 深圳市睿迈德科技有限公司 | Intelligent touch light-adjusting switch and intelligent light-adjusting lamp applying same |
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| CN206258849U (en) * | 2016-12-15 | 2017-06-16 | 深圳市赛元微电子有限公司 | A kind of capacitor touch button device with LED display functions |
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|---|---|---|---|---|
| US20070070044A1 (en) * | 2005-09-23 | 2007-03-29 | Elan Microelectronics Corp. | Key touchpad module |
| US20120217147A1 (en) * | 2008-10-27 | 2012-08-30 | Microchip Technology Incorporated | Physical force capacitive touch sensors having conductive plane and backlighting |
| US20110102326A1 (en) * | 2008-12-16 | 2011-05-05 | Casparian Mark A | Systems and methods for implementing haptics for pressure sensitive keyboards |
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| CN114390747A (en) * | 2020-10-16 | 2022-04-22 | 深圳市睿迈德科技有限公司 | Intelligent touch light-adjusting switch and intelligent light-adjusting lamp applying same |
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