CN205232189U - Touch circuit - Google Patents
Touch circuit Download PDFInfo
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- CN205232189U CN205232189U CN201521082866.8U CN201521082866U CN205232189U CN 205232189 U CN205232189 U CN 205232189U CN 201521082866 U CN201521082866 U CN 201521082866U CN 205232189 U CN205232189 U CN 205232189U
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Abstract
The utility model relates to a touch circuit for the touch panel of electromagnetism stove. This touch circuit includes: the touch chip, the internal integration that should touch the chip has electric capacity touch module for produce demonstration information according to the received capacitance variation signal and erupt simultaneously and give outside display circuit, should touch moreover the chip also be used for with outside master control circuit communication, the touch button module is connected in the key signal input of touch chip for the outside touch action of response, and production capacitance variation signal transmission touches the chip for this, power module connects in the power input end of touch chip for it carries for this touch chip to take care of the back with the power of outside. Above -mentioned touch circuit utilizes the integrated advantage that touches the chip, simplifies the peripheral circuit, practices thrift the cost to the structure of simplified circuit and improved circuit's reliability.
Description
Technical field
The utility model relates to the touching technique of electronic product, particularly relates to a kind of touch circuit being applied to electromagnetic oven.
Background technology
The key-press input of electronic product is generally touch-switch, there is the life-span short, easy loose contact, the shortcomings such as poor reliability.The development of modern touching technique, especially capacitance touch technology, has been applied to each electronics field, and the reliability of product and useful life are improved greatly.
Traditional touch circuit generally comprises: input conditioning module, induction module and integration output module etc.Its defect existed is: circuit structure is complicated, and peripheral cell is many, and circuit parameter is subject to the distinct issues such as variation of ambient temperature, and the reliability of product has much room for improvement.
Utility model content
Based on this, provide the touch circuit that a kind of structure is simple and reliability is strong.
A kind of touch circuit, for the touch control of electromagnetic oven.This touch circuit comprises:
Touch chip, the inside of this touch chip is integrated with capacitance touching control module, and for producing display information according to the capacitance change signal received and sending to outside display circuit, and this touch chip is also for the governor circuit communication with outside;
Touch key-press module, be connected to the push button signalling input touching chip, for responding to outside touch action, and generation capacitance change signal sends to this touch chip, touch key-press module comprises multiple touch spring button being connected in parallel in the push button signalling input touching chip respectively, each touch spring button comprises the touch panel, spring and the pcb board that connect successively, and this pcb board is used for being connected with the push button signalling input touching chip;
Power module, is connected to the power input touching chip, after being nursed one's health by the power supply of outside, flows to this touch chip.
Above-mentioned touch circuit, the inside of the touch chip that it comprises is integrated with capacitance touching control module.When the finger of user is near to or in contact with during to the touch modules be connected with touch chip, the change of the capacitance of touch modules can change the frequency touching chip internal induced oscillation device, can monitor touch action by the change of measuring frequency.After touch core monitors suitable touch action, send display information to the display circuit of outside to show required information.And, touch chip also with governor circuit communication, to realize the control operation between governor circuit.By above-mentioned design, utilize the integrated advantage touching chip, peripheral circuits, cost-saving, to simplify the structure of circuit and to improve the reliability of circuit.
Wherein in an embodiment, this touch circuit also comprises the display circuit interface be connected with the data switching port touching chip, and this display circuit interface is used for being connected with the display circuit of outside.
Wherein in an embodiment, this touch circuit also comprises the governor circuit interface be connected with the data switching port touching chip, and this governor circuit interface is used for being connected with the governor circuit of outside.
Wherein in an embodiment, power module comprises resistance R1, electric capacity C1 and electric capacity C2, between the power input VDD that resistance R1 is connected to touch chip and the positive pole of external power source; One end of electric capacity C1 is connected to wherein one end of this resistance R1, other end ground connection and with touch the power input VSS of chip and be connected; One end of electric capacity C2 is connected to the other end of this resistance R1, other end ground connection and with touch the power input VSS of chip and be connected.
Wherein in an embodiment, power module also comprises electrochemical capacitor EC1 and electrochemical capacitor EC2, and electrochemical capacitor EC1 is parallel to the two ends of electric capacity C1, and electrochemical capacitor EC2 is parallel to the two ends of electric capacity C2.
Wherein in an embodiment, touching chip is touch controlled key 8 single-chip microcomputers.
Accompanying drawing explanation
Fig. 1 is the theory diagram of touch circuit of the present utility model;
Fig. 2 is the circuit theory diagrams of the touch circuit shown in Fig. 1;
Fig. 3 is the structural representation of the touch spring button shown in Fig. 2.
Embodiment
For feature of the present utility model, technological means and the specific purposes reached, function can be understood further, resolve advantage of the present utility model and spirit, by below in conjunction with accompanying drawing and embodiment, detailed description of the present utility model is further understood.
Refer to accompanying drawing 1 to accompanying drawing 3, which show the dependency structure of the touch circuit 10 of the application.
As shown in Figure 1, it is the theory diagram of the touch circuit 10 of the present embodiment.
A kind of touch circuit 10, for the touch control of electromagnetic oven, this touch circuit 10 mainly comprises following five modules:
Touch chip 110, the inside of this touch chip 110 is integrated with capacitance touching control module, and for producing display information according to the capacitance change signal received and sending to outside display circuit, and this touch chip 110 is also for the governor circuit communication with outside.
Touch key-press module 120, is connected to the push button signalling input touching chip 110, and for responding to outside touch action, and generation capacitance change signal sends to this touch chip 110.
Power module 130, is connected to the power input touching chip 110, flows to this touch chip 110, carry out alternately, realizing the object of the controlling functions needed for product to reach with the information of master control borad after being nursed one's health by the power supply of outside.
Display circuit interface 140, is connected, for being connected with the display circuit of outside, to show the relevant information of product with the data switching port touching chip 110.
Governor circuit interface 150, is connected, for being connected with the governor circuit of outside with the data switching port touching chip 110.
It should be noted that, above-mentioned display circuit interface 140 and governor circuit interface 150 are for the ease of being connected with the display circuit and governor circuit of electromagnetic oven, namely for the ease of assembling.In other embodiments, above-mentioned display circuit interface 140 and governor circuit interface 150 can be saved, and be connected with the display circuit of electromagnetic oven and governor circuit by touching the data switching port of chip 110.
As shown in Figure 2, it is the circuit theory diagrams of the touch circuit 10 of the present embodiment.
Touching chip 110 is touch controlled key 8 single-chip microcomputers, as in the present embodiment, adopt model to be the chip of BS82C16A-3, it is band LED/LCD driving function touch controlled key 8-BitFlash type single-chip microcomputer, and the quantity that can be applicable to touch spring button K is the touch control of to ten six.In other embodiments, the chip other can being selected suitable according to the quantity touching spring button K.
Touch key-press module 120 comprises the touch spring button K that 16 are connected in parallel in the push button signalling input touching chip 110 respectively.Herein, incorporated by reference to accompanying drawing 3, it is the structural representation of the touch spring button K of the present embodiment.Each touch spring button K comprises the touch panel 121, spring 122 and the pcb board 123 that connect successively, and this pcb board 123 is for being connected with the push button signalling input touching chip 110.
Power module 130 comprises resistance R1, electric capacity C1 and electric capacity C2, between the power input VDD that resistance R1 is connected to touch chip 110 and the positive pole of external power source; One end of electric capacity C1 is connected to wherein one end of this resistance R1, other end ground connection and with touch the power input VSS of chip 110 and be connected; One end of electric capacity C2 is connected to the other end of this resistance R1, other end ground connection and with touch the power input VSS of chip 110 and be connected.The filter circuit of resistance R1, electric capacity C1 and electric capacity C2 group " Π " type, be connected to touch chip 110 pin VDD and VSS between, provide and touch stabilized power supply needed for chip 110, improve antijamming capability.Above-mentioned electric capacity C1 and electric capacity C2 is ceramic condenser, considers that its capacitance is less.In order to allow its electric capacity total amount increase to adapt to larger capacitance demand, in the present embodiment, power module 130 also add electrochemical capacitor EC1 and electrochemical capacitor EC2, and electrochemical capacitor EC1 is parallel to the two ends of electric capacity C1, and electrochemical capacitor EC2 is parallel to the two ends of electric capacity C2.
Display circuit interface 140, can select six pin sockets, and wherein four pins are used for connecting one to one with four the data switching port I/O touching chip 110, and two other pin is Power supply and grounding respectively.
Governor circuit interface 150, can select four pin sockets, and wherein two pins are used for connecting one to one with two the data switching port I/O touching chip 110, and two other pin is Power supply and grounding respectively.
Operation principle: what touch chip 110 employing is 8 single-chip microcomputers, and inside is integrated with capacitance touching control module.When pointing near to or in contact with during to touch panel, the capacitance of touch panel can increase, and the change of capacitance slightly can change the frequency touching chip 110 induced inside oscillator, can perception touch action by the change of measuring frequency.Reference clock enough produces a fixed time period by internal programmable frequency divider is logical.Within this time cycle, by the clock cycle count produced induced oscillation device, the action of the finger touch button K of user can be determined.In reference clock fixed time interval, the clock periodicity that induced oscillation device produces can be measured.This periodicity may be used for judging whether touch action occurs.Such as, each touch-control module comprises 4 touch controlled keys shared with I/O pin, can arrange corresponding pin function by register.All touch key-press detects and process can have been come by the inside programming touching chip 110, after suitable button being detected, and the information needed for being shown with outside display circuit by display interface.In addition, corresponding control operation is carried out by governor circuit interface 150 to master control communication.
Above-mentioned touch circuit 10, the inside of the touch chip 110 that it comprises is integrated with capacitance touching control module.When the finger of user is near to or in contact with during to the touch modules be connected with touch chip 110, the change of the capacitance of touch modules can change the frequency touching chip 110 induced inside oscillator, can monitor touch action by the change of measuring frequency.After touch core monitors suitable touch action, send display information to the display circuit of outside to show required information.And, touch chip 110 also with governor circuit communication, to realize the control operation between governor circuit.By above-mentioned design, utilize the integrated advantage touching chip 110, peripheral circuits, cost-saving, reduce ambient temperature to the impact of circuit, to simplify the structure of circuit and to improve the reliability of circuit.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (6)
1. touch a circuit, for the touch control of electromagnetic oven, it is characterized in that, this touch circuit comprises:
Touch chip, the inside of this touch chip is integrated with capacitance touching control module, and for producing display information according to the capacitance change signal received and sending to outside display circuit, and this touch chip is also for the governor circuit communication with outside;
Touch key-press module, be connected to the push button signalling input of described touch chip, for responding to outside touch action, and generation capacitance change signal sends to this touch chip, described touch key-press module comprises multiple touch spring button being connected in parallel in the push button signalling input of described touch chip respectively, each described touch spring button comprises the touch panel, spring and the pcb board that connect successively, and this pcb board is used for being connected with the push button signalling input of described touch chip;
Power module, is connected to the power input of described touch chip, after being nursed one's health by the power supply of outside, flow to this touch chip.
2. touch circuit according to claim 1, is characterized in that, this touch circuit also comprises the display circuit interface be connected with the data switching port of described touch chip, and this display circuit interface is used for being connected with the display circuit of outside.
3. touch circuit according to claim 1, is characterized in that, this touch circuit also comprises the governor circuit interface be connected with the data switching port of described touch chip, and this governor circuit interface is used for being connected with the governor circuit of outside.
4. touch circuit according to claim 1, is characterized in that, described power module comprises resistance R1, electric capacity C1 and electric capacity C2, between the power input VDD that described resistance R1 is connected to described touch chip and the positive pole of external power source; One end of described electric capacity C1 is connected to wherein one end of this resistance R1, other end ground connection and being connected with the power input VSS of described touch chip; One end of described electric capacity C2 is connected to the other end of this resistance R1, other end ground connection and being connected with the power input VSS of described touch chip.
5. touch circuit according to claim 4, it is characterized in that, described power module also comprises electrochemical capacitor EC1 and electrochemical capacitor EC2, and described electrochemical capacitor EC1 is parallel to the two ends of described electric capacity C1, and described electrochemical capacitor EC2 is parallel to the two ends of described electric capacity C2.
6. touch circuit according to claim 1, is characterized in that, described touch chip is touch controlled key 8 single-chip microcomputers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521082866.8U CN205232189U (en) | 2015-12-21 | 2015-12-21 | Touch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521082866.8U CN205232189U (en) | 2015-12-21 | 2015-12-21 | Touch circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205232189U true CN205232189U (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521082866.8U Active CN205232189U (en) | 2015-12-21 | 2015-12-21 | Touch circuit |
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| Country | Link |
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| CN (1) | CN205232189U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707238A (en) * | 2016-08-08 | 2018-02-16 | 马正华 | A kind of double open switch |
| CN109256296A (en) * | 2018-12-10 | 2019-01-22 | 广州星弈电子科技有限公司 | A kind of adjusting knob equipped with touching switch |
-
2015
- 2015-12-21 CN CN201521082866.8U patent/CN205232189U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707238A (en) * | 2016-08-08 | 2018-02-16 | 马正华 | A kind of double open switch |
| CN109256296A (en) * | 2018-12-10 | 2019-01-22 | 广州星弈电子科技有限公司 | A kind of adjusting knob equipped with touching switch |
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