CN201897767U - Capacitance inductive keyboard used for water quality monitoring instrument - Google Patents
Capacitance inductive keyboard used for water quality monitoring instrument Download PDFInfo
- Publication number
- CN201897767U CN201897767U CN2010206652294U CN201020665229U CN201897767U CN 201897767 U CN201897767 U CN 201897767U CN 2010206652294 U CN2010206652294 U CN 2010206652294U CN 201020665229 U CN201020665229 U CN 201020665229U CN 201897767 U CN201897767 U CN 201897767U
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- water quality
- quality monitoring
- monitoring instrument
- keyboard
- double
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- Expired - Lifetime
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Abstract
The utility model discloses a capacitance inductive keyboard used for a water quality monitoring instrument, which comprises a facial mask mounted on the upper surface of a front cover plate of the water quality monitoring instrument; a keyboard pattern is arranged on the facial mask; the capacitance inductive keyboard also comprises a double-side circuit board additionally arranged inside the water quality monitoring instrument; a round copper membrane capacity electrode is etched on the position of the upper surface of the double-side circuit board matched with the keyboard pattern in the facial mask; moreover, copper is paved on the rest part of the upper surface of the double-side circuit board to form a copper paved capacity electrode; and the copper membrane capacity electrode leads a signal into a capacitance detection circuit welded on the lower surface of the double-side circuit board. The capacitance inductive keyboard does not have mechanical contacts and moving parts, and completely identifies keys through the capacitance change caused by pressing fingers on the surface of an article; the moving times of the keys are not limited, and the service life is approximately infinite; moreover, a plurality of millimeters of insulation substances can be arranged between the keys and the fingers, which are beneficial for the water prevention and dust prevention of a shell of the water quality monitoring instrument, and thus improving the protection grades of the instrument.
Description
Technical field
The utility model relates to a kind of water quality monitoring instrument, more particularly, relates to a kind of capacitive induction keyboard that is used for the water quality monitoring instrument.
Background technology
The operation keyboard of tradition water quality monitoring instrument has: mechanical switch formula keyboard, thin film switch formula keyboard, these keyboards so the actuation of keys number of times all is limited, promptly have mission life because mechanical moving element is arranged.
The utility model content
In order to overcome the shortcoming of existing switching regulator keyboard, the purpose of this utility model is to provide a kind of capacitive induction keyboard.
Be used for the capacitive induction keyboard of water quality monitoring instrument in the utility model, include the facial mask above the front shroud that is installed in the water quality monitoring instrument, described facial mask is provided with keyboard pattern; Described capacitive induction keyboard also includes the double-sided PCB of setting up in water quality monitoring instrument inside, and etch circular copper film capacitance electrode in the upper surface of the described double-sided PCB position corresponding with keyboard pattern in the described facial mask, and at copper formation shop, the upper surface remainder shop of described double-sided PCB copper capacitance electrode, described copper film capacitance electrode is introduced signal the capacitive detection circuit that is welded on described double-sided PCB lower surface by copper film capacitance electrode lead-in wire.
On described facial mask, be provided with the transparency display window mouth.
Capacitive induction keyboard in the utility model does not have mechanical contact and moving component, relies on finger by causing that on surface of keyboard changes in capacitance discerns button fully, has not so just had the restriction of actuation of keys number of times, and mission life is close to infinitely; And can increase several millimeters megohmite insulant between button and the finger, help the waterproof and dustproof of instrument and meter.
Description of drawings
Fig. 1 is the front-view schematic diagram of water quality monitoring instrument in the utility model.
Fig. 2 is the sectional structure synoptic diagram of capacitive induction keyboard in the utility model.
Fig. 3 is along the partial schematic sectional view of A-A line among Fig. 2.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the utility model is described further.
As shown in Figure 1, on the front shroud 4 of water quality monitoring instrument, facial mask 1 is installed, transparency display window mouth 2 and keyboard pattern 3 are arranged on the facial mask 1.
As shown in Figure 2, set up a double-sided PCB 9 in water quality monitoring instrument inside, and etch circular copper film capacitance electrode 5 in the upper surface of double-sided PCB 9 position corresponding with keyboard pattern in the facial mask 1, and the upper surface remainder of double-sided PCB 9 shop copper forms shop copper capacitance electrode 6, copper film capacitance electrode 5 is introduced signal the capacitive detection circuit 8 that is welded on double-sided PCB 9 lower surfaces by copper film capacitance electrode lead-in wire 7, when pointing by position at keyboard pattern 3, changed the specific inductive capacity of copper film capacitance electrode 5 with shop copper capacitance electrode 6 formed electric capacity, thereby changed capacitor's capacity, capacitive detection circuit detects capacitor's capacity to be changed, and then judges keyboard and whether press.
As shown in Figure 3, copper film capacitance electrode 5 is rounded, is spread in copper capacitance electrode 6 is enclosed in.
The utility model is pasted a double-sided PCB 9 in the back of facial mask 1, and the position of printing keyboard pattern 3 etches a circle or square copper film on double-sided PCB 9 on double-sided PCB 9 corresponding facial masks 1, form copper film capacitance electrode 5, and around copper film electric capacity electroplax 5, spread copper, form shop copper capacitance electrode 6, shop copper capacitance electrode 6 is connected with the signal ground of circuit, form an electric capacity between then circular or square copper film capacitance electrode 5 and the shop copper capacitance electrode 6 on every side, and circle or square copper film capacitance electrode 5 are connected with capacitive detection circuit 8, when the position of finger by the keyboard pattern 3 of printing on facial mask 1, then changed the specific inductive capacity of electric capacity, thereby changed capacitor's capacity, capacitive detection circuit 8 detects capacitor's capacity to be changed, and then judges keyboard and whether press.
Claims (2)
1. a capacitive induction keyboard that is used for the water quality monitoring instrument includes the facial mask above the front shroud that is installed in the water quality monitoring instrument, and described facial mask is provided with keyboard pattern; It is characterized in that, described capacitive induction keyboard also includes the double-sided PCB of setting up in water quality monitoring instrument inside, and etch circular copper film capacitance electrode in the upper surface of the described double-sided PCB position corresponding with keyboard pattern in the described facial mask, and at copper formation shop, the upper surface remainder shop of described double-sided PCB copper capacitance electrode, described copper film capacitance electrode is introduced signal the capacitive detection circuit that is welded on described double-sided PCB lower surface by copper film capacitance electrode lead-in wire.
2. the capacitive induction keyboard that is used for the water quality monitoring instrument according to claim 1 is characterized in that, is provided with the transparency display window mouth on described facial mask.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206652294U CN201897767U (en) | 2010-12-16 | 2010-12-16 | Capacitance inductive keyboard used for water quality monitoring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206652294U CN201897767U (en) | 2010-12-16 | 2010-12-16 | Capacitance inductive keyboard used for water quality monitoring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201897767U true CN201897767U (en) | 2011-07-13 |
Family
ID=44255670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206652294U Expired - Lifetime CN201897767U (en) | 2010-12-16 | 2010-12-16 | Capacitance inductive keyboard used for water quality monitoring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201897767U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809420A (en) * | 2012-07-26 | 2012-12-05 | 奥豪斯仪器（常州）有限公司 | Capacitive keyboard of electronic scale and anti-interference detecting method for capacitive keyboard |
-
2010
- 2010-12-16 CN CN2010206652294U patent/CN201897767U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809420A (en) * | 2012-07-26 | 2012-12-05 | 奥豪斯仪器（常州）有限公司 | Capacitive keyboard of electronic scale and anti-interference detecting method for capacitive keyboard |
| CN102809420B (en) * | 2012-07-26 | 2015-04-01 | 奥豪斯仪器（常州）有限公司 | Capacitive keyboard of electronic scale and anti-interference detecting method for capacitive keyboard |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Ma Yunfei Document name: Notification that Application Deemed not to be Proposed |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 100076 Beijing City, Xihongmen, the town of gold street, No. 10, No. Patentee after: HKY TECHNOLOGY CO., LTD. Address before: 102206 Beijing City, Changping District Shahe qiliqu Village Industrial Park Patentee before: Beijing Huakeyi Power Plant Instrument Research Institute |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110713 |