CN201985835U - Projection touch button - Google Patents
Projection touch button Download PDFInfo
- Publication number
- CN201985835U CN201985835U CN2010202485786U CN201020248578U CN201985835U CN 201985835 U CN201985835 U CN 201985835U CN 2010202485786 U CN2010202485786 U CN 2010202485786U CN 201020248578 U CN201020248578 U CN 201020248578U CN 201985835 U CN201985835 U CN 201985835U
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- China
- Prior art keywords
- button
- field intensity
- module
- circuit board
- control module
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- Expired - Lifetime
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Abstract
The utility model discloses a projection touch button, which includes a button projection module, a capacitive field intensity detecting module and a control module. The button projection module comprises an operation plate, a circuit board, at least one real button position and an operational button position corresponding to the real button position. The operation plate and the circuit board form an angle ranging from 0 degree to 90 degrees. The real button position is located on the circuit board, the operational button position is located in a projection area of the real button position on the operation plate, and the distance between the real button position and the operational button position is less than 20 cm. The real button position is connected with the input end of the capacitive field intensity detecting module, and the output end of the capacitive field intensity detecting module is connected with the input end of the control module. Variations of capacitive field intensity between the real button position and the operational button position are detected by the capacitive field intensity detecting module, the results are transmitted to the control module, and the control module performs button-pressing treatment. The projection touch button realizes separation of a button operation plate and a printed circuit board (PCB).
Description
Technical field
The utility model relates to a kind of touch key-press, relates in particular to a kind of projection type capacitance touch key-press, belongs to the touch key-press technical field.
Background technology
Touch-key has had very years of development in fact, that the guidance panel of touch sensible has is firm, wear-resistant, can insulation, the advantage of dust-separation, water proof, and its good looking appearance novelty.But because cost and stable aspect, just begin on electronic equipment popularly in a large number until in recent years, particularly in some home appliances, the advantage of touch key-press is more obvious, becomes hot technology in recent years.The capacitance type touch key that is widely adopted at present adopts capacitance induction principle, insulating properties material shell such as the glass of penetrable 15mm thickness, plastics and detect the touch of finger.Capacitance type touch key mostly adopts man-machine interaction mode, and promptly the operator triggers button work with direct contact of finger and PCB circuit board key bits corresponding, and this just causes long touch wearing and tearing easily, thereby influences the useful life of button.The direct connection processing circuit in while existing touch sensible key panel back, production technological requirement height, key panel or circuit board maintenance, replacing trouble, poor expandability.The more important thing is that people are when paying close attention to the electronics and IT products quality, more and more pursue the fashion of modern science and technology product and attractive in appearance, if can make the guidance panel of touch key-press transparent, and the button pattern of fashion attractive in appearance is set on transparent panel, must satisfy the pursuit of user, thereby excite its interest and demand product to modern science and technology product fashion, novelty.But existing touch sensible key panel back direct connection processing circuit PCB can't solve the technical problem of developing transparent button operation panel.
The utility model content
The purpose of this utility model is to provide a kind of projection touch key, realizes separating of button operation panel and PCB circuit board, and it realizes the identification of button by the size that changes actual key position and operation push-button interdigit capacitor field intensity.
The purpose of this utility model is achieved by the following technical programs:
A kind of projection touch key comprises button projection module 1, capacitor field intensity detection module 2, control module 3; Described button projection module 1 comprises operation panel 4, circuit board 5, operation panel 4 is by the non-conducting material manufacturing, also comprise at least one actual key position 6 and and the operation push-button position 7 of each actual key position 6 correspondence, described operation panel 4 and circuit board 5 have angle, the scope of angle is 0 °～90 °, described actual key position 6, capacitor field intensity detection module 2, control module 3 is positioned on the circuit board 5, operation push-button position 7 is positioned on the operation panel 4, operation push-button position 7 is in the view field of actual key position 6 on operation panel 4, and the distance of described actual key position 6 and operation push-button position 7 is less than 20 centimetres; Described actual key position 6 links to each other with the input of capacitor field intensity detection module 2, the output of capacitor field intensity detection module 2 links to each other with the input of control module 3, capacitor field intensity detection module 2 detects the variation of capacitor field intensity between actual key position 6 and the operation push-button position 7, and sending variable quantity to control module 3, the button that control module 3 is correlated with is handled.
The purpose of this utility model can also further realize by following technical measures:
Aforementioned projection touch key, the 6 conplane outsides are provided with shading ring 8 in the actual key position.
Aforementioned projection touch key, wherein capacitor field intensity detection module 2 uses capacitance touch IC chip.
Compared with prior art, the beneficial effects of the utility model are: realize separating of button operation panel and PCB circuit board, thereby reduce the manufacture craft requirement to touch-screen, key panel or circuit board keep in repair, change easy.Can trigger button in the space during use, allow the user produce fresh, magical operating experience.
Description of drawings
Fig. 1 is a circuit structure diagram of the present utility model;
Fig. 2 is a button projection module structure chart of the present utility model;
Fig. 3 is a single IC chip capacity field intensity scanning circuit structure chart of the present utility model;
Fig. 4 is a plurality of IC chip capacity field intensity scanning circuit structure chart of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the utility model comprises button projection module 1, capacitor field intensity detection module 2, control module 3.As shown in Figure 2, described button projection module 1 comprises operation panel 4, circuit board 5, also comprises several actual key positions 6 and and the operation push-button position 7 of each actual key position 6 correspondence.Present embodiment has six actual key positions and corresponding operation push-button position, is respectively applied for volume increase and decrease, channel selection, power supply control, the menu control function of control television set.Described operation panel 4 and circuit board 5 form an angle, and the present embodiment angle is 45 °.Described actual key position 6, capacitor field intensity detection module 2, control module 3 are installed on the circuit board 5, actual key position 6 is made by electric conductor, for preventing the phase mutual interference between a plurality of buttons, be provided with shading ring 8 in each 6 outside, actual key position, be installed on the circuit board 5.Operation push-button position 7 is positioned on the operation panel 4, and operation push-button position 7 is in the view field of actual key position 6 on operation panel 4, and present embodiment operation panel 4 is by transparent polymethyl methacrylate manufacturing, and operation push-button position 7 is printed on corresponding button sign.Described actual key position 6 is 10 centimetres with the distance of operation push-button position 7.Said structure has been realized separating of button operation panel and PCB circuit board.Described actual key position 6 links to each other with the input of capacitor field intensity detection module 2, the output of capacitor field intensity detection module 2 links to each other with the input of control module 3, capacitor field intensity detection module 2 detects the variation of capacitor field intensity between actual key position 6 and the operation push-button position 7, and sending variable quantity to control module 3, the button that control module 3 is correlated with is handled.Capacitor field intensity detection module 2 uses capacitance touch IC chip in the present embodiment, and described control module 3 is a MCU chip, has the interface that carries out serial asynchronous communication.As shown in Figure 1, when using, the user directly do not contact actual key position 6, but touch operation button position 7, the actual key position 6 that people's finger and conductor are made forms certain electric capacity, capacitance touch IC chip detects the variation of capacitor field intensity between the two by the mode of scanning, the capacitor field intensity variable quantity is converted to digital quantity by AD sends to MCU central processing unit chip, key system just can be judged user's action command, carries out button then and triggers processing and output.Aforementioned actual key position 6 arranged outside shading rings 8 are in order to divide the toggle area scope of different key, thereby avoid misoperation.In fact, the user needn't really touch operation push-button position 7 in use, as long as point the inductive spacing zone that enters this button according to the guide of button sign, just can trigger button work every sky.Simultaneously, because actual key position 6, capacitor field intensity detection module 2, control module 3 etc. are installed on the circuit board 5, and operation panel 4 is by made such as transparent polymethyl methacrylate or ABS, and transparent operation panel does not have any circuit for 4 times, can allow the user produce fresh, magical operating experience.
Can cooperate the Digital Logic switch to realize the scanning that the button capacitor field intensity is changed by single capacitance touch IC chip when specifically implementing as shown in Figure 3.Connect a Digital Logic switch on the PCB circuit board behind each actual key position, the Digital Logic switch is connected with capacitance touch IC chip, capacitance touch IC chip carries out key scan by the open and close of control figure logic switch, and the capacitor field intensity variable quantity of detected respective keys carried out the AD conversion, the data after will change again send to MCU central processing unit chip and carry out corresponding button processing.This scheme is only used a capacitance touch IC chip, saves cost.
As shown in Figure 4, another implementation method of the scanning circuit that capacitor field intensity changes is that each actual key position directly is connected with a capacitance touch IC process chip on the PCB circuit board, each capacitance touch IC chip is responsible for detecting the capacitor field intensity variation of corresponding button, a plurality of capacitance touch IC process chip are connected with the MCU central processing unit respectively, the MCU central processing unit is realized the scanning to a plurality of IC chips, receives the data that the IC chip sends.Also establish a capacitor field intensity in the capacitance touch IC process chip and change threshold values, has only capacitor field intensity variable quantity that user's finger touch operation push-button triggers greater than default field intensity threshold values, capacitance touch IC chip can be discerned user's action command, MCU compares a plurality of data that the IC chip sends by certain algorithm, determine to have only the button of capacitor field intensity variable quantity maximum to be triggered, other key is not triggered, and identification valid function and misoperation are handled thereby carry out corresponding key.
In addition to the implementation, the utility model can also have other execution modes, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of the utility model requirement.
Claims (3)
1. a projection touch key is characterized in that, comprises button projection module (1), capacitor field intensity detection module (2), control module (3); Described button projection module (1) comprises operation panel (4), circuit board (5), operation panel (4) is by the non-conducting material manufacturing, also comprise at least one actual key position (6) and the operation push-button position (7) corresponding with each actual key position (6), described operation panel (4) and circuit board (5) have angle, the scope of this angle is 0 °～90 °, described actual key position (6), capacitor field intensity detection module (2), control module (3) is positioned on the circuit board (5), operation push-button position (7) is positioned on the operation panel (4), operation push-button position (7) is in the view field of actual key position (6) on operation panel (4), and the distance of described actual key position (6) and operation push-button position (7) is less than 20 centimetres; Described actual key position (6) links to each other with the input of capacitor field intensity detection module (2), the output of capacitor field intensity detection module (2) links to each other with the input of control module (3), capacitor field intensity detection module (2) detects the variation of capacitor field intensity between actual key position (6) and operation push-button position (7), and sending variable quantity to control module (3), the button that control module (3) is correlated with is handled.
2. projection touch key as claimed in claim 1 is characterized in that, the conplane outside, described actual key position (6) is provided with shading ring (8).
3. projection touch key as claimed in claim 1 or 2 is characterized in that, described capacitor field intensity detection module (2) uses capacitance touch IC chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202485786U CN201985835U (en) | 2010-06-30 | 2010-06-30 | Projection touch button |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202485786U CN201985835U (en) | 2010-06-30 | 2010-06-30 | Projection touch button |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201985835U true CN201985835U (en) | 2011-09-21 |
Family
ID=44613285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202485786U Expired - Lifetime CN201985835U (en) | 2010-06-30 | 2010-06-30 | Projection touch button |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201985835U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503326A (en) * | 2014-12-19 | 2015-04-08 | 重庆川仪自动化股份有限公司 | Actuator control system |
-
2010
- 2010-06-30 CN CN2010202485786U patent/CN201985835U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503326A (en) * | 2014-12-19 | 2015-04-08 | 重庆川仪自动化股份有限公司 | Actuator control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110921 Effective date of abandoning: 20120523 |