CN204332775U - Film key - Google Patents
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- CN204332775U CN204332775U CN201420563962.3U CN201420563962U CN204332775U CN 204332775 U CN204332775 U CN 204332775U CN 201420563962 U CN201420563962 U CN 201420563962U CN 204332775 U CN204332775 U CN 204332775U
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Abstract
The utility model discloses a kind of film key, belong to membrane switch technology field, solve printed substrate in existing false touch screen solution and inconvenient problem is installed, film key of the present utility model comprises basic unit, circuit layer, be printed in described basic unit, described circuit layer comprises key zone and blind zone, described key zone has multiple spaced button electrode, and described blind zone has the bucking electrode being looped around periphery, described key zone.The utility model embodiment is applied to household electrical appliance, conditioner etc.
Description
[technical field]
The utility model relates to film key, especially has the capacitive films button of mistaken touch function of shielding, belongs to membrane switch technology field.
[background technology]
Current most household electrical appliance adopt touch control panel to replace traditional mechanical operation button, and its mode of operation is simple, directly perceived, easy-to-use, is very imbued with hommization.Existing touch manipulation technology mainly comprises resistive touch technology and surperficial capacitive touch technology, i.e. resistive touch screen of the prior art and capacitive touch screen, is usually used in the household electrical appliances such as washing machine, conditioner.But in actual use procedure, household electrical appliances can be made unintentionally to start or quit work when there being water droplet to splash near touch key-press switch or when using near the cleaning appliance wiping soft-touch controls such as wet rag, using to user makes troubles.
Scheme for solving false touch screen is existing to be suggested, such as Copper Foil is set in outside point, printed substrate key area, printed substrate is connected with substrate by winding displacement, when arranging Copper Foil region and being triggered, system is judged as invalid triggering, i.e. the unconscious operation of user, so can solve false touch screen problem, but existing false touch screen solution exists many drawbacks: the space length that the cabling requirement of printed substrate and winding displacement is enough, assembly difficulty is larger; Printed substrate requires that the guidance panel coordinated with it must be plane, even occur that some curved surfaces all can affect touch performance, fixed form is more difficult; In addition, printed substrate is more harsh to other environmental conditions such as temperature, humidity, acid-alkali salt, vibration, does not have fabulous tolerance and useful life.
[utility model content]
Problem to be solved in the utility model is just to provide a kind of film key, has mistaken touch function of shielding, and structure is simple, is convenient to assembling.
Film key, comprising:
Basic unit,
Circuit layer, be printed in described basic unit, described circuit layer comprises key zone and blind zone, and described key zone has multiple spaced button electrode, and described blind zone has the bucking electrode being looped around periphery, described key zone.
Wherein, described film key also comprises trace layer, and described trace layer has the contact conductor be connected with described button electrode and described bucking electrode.
Wherein, described trace layer and described circuit layer are integrally printed in described basic unit.
Wherein, described contact conductor end forms carbon slurry contact or splicing ear.
Wherein, described circuit layer is the conductive silver slurry layer be printed in described basic unit, conductive ink layer or carbon pulp layer.
Wherein, described film key also comprises gum layer and protective layer.
Wherein, described basic unit is PC film or PET film.
The beneficial effects of the utility model:
Film key of the present utility model, its circuit layer arranges key zone and blind zone, key zone has multiple spaced button electrode, blind zone has the bucking electrode being looped around periphery, key zone, that is, bucking electrode is almost all-round encirclement key zone, and this makes have more large-area bucking electrode to cover outside the key zone of circuit layer, improves the reliability of mistaken touch function of shielding.Because bucking electrode is looped around periphery, key zone, bucking electrode is not had between adjacent key electrode, user is (consciously touch key-press) under normal operation, the probability touching bucking electrode is very little, so both meet mistaken touch shielding requirements, can avoid under normal usage touching bucking electrode again.
The utility model film key used only has a circuit layer usually, compares existing film key to the strict defect of upper and lower circuit layer matching requirements, simplifies technological process, improve the production efficiency of whole product; And trace layer and circuit layer are integrally printed in basic unit, reduce the stress of lead-out wire extraction place.
For film key, adopt PC film or PET film as basic unit, the thickness of PC film or PET film is usually at 0.05mm-0.175mm, because button is thinner, less demanding to space length, reduce assembly difficulty, and film key can adapt to the shape need of various component better, by the panel attachment of glue and household electrical appliances, fixed form is simple.In addition, film key has very strong protection against the tide, dust-proof, oil-stain-preventing function, and sealing is strong, acid and alkali-resistance, antivibration, long service life.
These features of the present utility model and advantage will embodiment below, exposure detailed in accompanying drawing.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is the floor map of film key in the utility model embodiment one;
Fig. 2 is the A-A partial sectional view of Fig. 1;
Fig. 3 is the floor map of film key in the utility model embodiment two.
[embodiment]
The technical scheme of accompanying drawing to the utility model embodiment below in conjunction with the utility model embodiment is explained and illustrated, but following embodiment is only preferred embodiment of the present utility model, and not all.Based on the embodiment in execution mode, those skilled in the art under the prerequisite not making creative work obtain other embodiments, all belong to protection range of the present utility model.
Embodiment one:
With reference to Fig. 1, 2, the film key of the present embodiment, comprise basic unit 1 and circuit layer 2, circuit layer 2 is printed in basic unit 1, wherein circuit layer 2 comprises key zone 20 and blind zone 21, key zone 20 has multiple spaced button electrode 24, blind zone 21 has the bucking electrode 23 being looped around periphery, key zone 20, also be provided with trace layer simultaneously, trace layer has the contact conductor 25 be connected with button electrode 24 and bucking electrode 23, the end of contact conductor 25 forms carbon slurry contact 251, by contact conductor 25, button electrode 24 and bucking electrode 23 are connected one to one with the pin of the touch IC on substrate, transmit touch signal.
During practical application, using PET film as basic unit 1, PET film is printed conductive silver paste and forms button electrode 24 and bucking electrode 23 respectively, wherein button electrode 24 is arranged at intervals with multiple according to action need, this multiple button electrode 24 forms key area, and bucking electrode 23 is looped around periphery, key area, and key area mentioned here also includes not by part that conductive silver paste covers, that is, to be separated by predetermined gap according to designing requirement between bucking electrode 23 and button electrode 24.Except PET film, PVC film, PC film all can be used as basic unit 1.As electrode material, except conductive silver paste, can also be electrically conductive ink or carbon slurry.
In basic unit 1 while printing button electrode 24 and bucking electrode 23, also print above-mentioned contact conductor 25, the end of contact conductor 25 forms carbon slurry contact 251, connect one to one with the pin touching IC, namely trace layer and circuit layer 2 are integrally printed in basic unit 1, the stress of contact conductor 25 extraction place can be reduced like this, reduce the phenomenon of film key surface irregularity, improve planarization and the aesthetics of product.
Certainly; film key is more than basic unit 1 and circuit layer 2 usually, and further comprises gum layer 4 and protective layer 3, gum layer 4 is for pasting the guidance panel of household electrical appliance by whole film key; protective layer 3 is located on circuit layer 2 usually, prevents button electrode 24 and bucking electrode 23 from being scratched by hard object.
Those skilled in the art should know: film key can also as required, its number of plies are increased to five layers, six layers etc., as arranged separator, increasing layer etc., printing UV separator, plays buffer action, and structure is thinner simpler, production efficiency is higher, and the life-span is longer.In addition, film key can also be arranged to transparent or opaque body, thus make key legend word through various light or light tight.These technology are known by art technology people, no longer describe in detail herein.
According to capacitance touch induction technology, coupling capacitance is formed between user's finger and touch key-press, but, after touch key-press connects touch IC, touch key-press contains external touch inductance capacitance CF and loop parasitic capacitance CP to the capacitance CX touching IC port, wherein loop parasitic capacitance CP is intrinsic existence, after user points touching touch key-press, external touch inductance capacitance CF is caused to increase, namely capacitance CX increases, main IC on substrate, by the calculating in internal capacitance charging interval, draws capacitance variations value, and then key range action.Be specifically applied in the present embodiment: when touching IC and starting working, detect the change of electric capacity on bucking electrode 23 and button electrode 24 in real time, when having water droplet or other liquid and pressed powder etc. to be splashed to blind zone 21 or when using the cleaning appliances such as wet rag to clean in blind zone 21, also or staff misoperation or by covering blind zone 21, palm district time, the capacitance on bucking electrode 23 can change a lot.Touch chip and master chip pass through I
2the signal numerical value on each button electrode 24 and bucking electrode 23 is read in C communication in real time; When the signal numerical value on the bucking electrode 23 that master chip reads is greater than the initial trigger threshold set in program, judge that bucking electrode 23 is triggered (mistaken touch generation), thus enter mistaken touch tupe, this pattern can by specific instruction process on main program, in time the touch-responsive of whole button electrode 24 is shielded, thus prevent button electrode 24 by false triggering.
In simple terms: the present embodiment is provided with bucking electrode 23 around key zone 20, can judge it is that water droplet or user's wiping etc. are cleared up the button electrode 24 caused and pressed, or the touch key-press electrode 24 that user has a mind to.Whether the main IC on household electrical appliance internal base plate reaches more than ormal weight (activation threshold value) according to the change of the electrostatic capacitance of bucking electrode 23, input from button electrode 24 is switched to effective or invalid, therefore so long as not the operation had a mind to, it is invalid just this operation to be set to, and reaches mistaken touch function of shielding.
When the water droplet on bucking electrode 23 or other liquid and pressed powder etc. are cleaned or the cleaning appliance such as wet rag withdraws bucking electrode 23 time, also or user's palm leaves blind zone 21 time, the capacitance of bucking electrode 23 reduces.The capacitance of the bucking electrode 23 that main IC detects is less than or equal to the activation threshold value of initial setting up, and main IC is judged to be normal operating condition, and main program sends and uses normal instruction.After main IC detects instruction, cancel the shielding that whole button electrode 24 is responded, button electrode 24 is responded and comes into force.
Because bucking electrode 23 is looped around periphery, key zone 20, bucking electrode 23 is almost all-round encirclement key zone 20 (removing electrode lead portion, negligible), this makes have more large-area bucking electrode 23 to cover outside the key zone 20 of circuit layer 2, improves the reliability of mistaken touch function of shielding.Because bucking electrode 23 is looped around periphery, key zone 20, bucking electrode 23 is not had between adjacent key electrode 24, user is (consciously touch key-press) under normal operation, the probability touching bucking electrode 23 is very little, so both meet mistaken touch shielding requirements, can avoid under normal usage again touching bucking electrode 23.In addition, it is peripheral that bucking electrode 23 is looped around key zone 20, and structure is relatively simple, and the printing being also conducive to electrode is shaping.
Embodiment two:
With reference to Fig. 3, the film key of the utility model embodiment two, comprise basic unit 1 and circuit layer 2, circuit layer 2 is printed in basic unit 1, wherein circuit layer 2 comprises key zone 20 and blind zone 21, key zone 20 has multiple spaced button electrode 24, blind zone 21 has the bucking electrode 23 being looped around periphery, key zone 20, also be provided with trace layer simultaneously, trace layer has the contact conductor 25 be connected with button electrode 24 and bucking electrode 23, by contact conductor 25, button electrode 24 and bucking electrode 23 are connected one to one with the pin of the touch IC on substrate, transmit touch signal.
The film press-key structure of the present embodiment is roughly the same with embodiment one, and same section is no longer described in further detail, unlike: contact conductor 25 end of the present embodiment film key is provided with splicing ear 252, is connected with the terminal on substrate by splicing ear 252.
In other embodiments, contact conductor also by conducting resinl thermo-compression bonding in base-plate terminal.
Film key described in above-described embodiment is mainly used in common capacitive films switch, capacitor thin film switch for spring-piece type is also applicable, spring-piece type capacitor thin film switch utilizes user to press after metal clips makes it be out of shape, and the change detecting capacitance between itself and button electrode carrys out key range action.
The utility model embodiment is applied to household electrical appliance, such as washing machine (rotary drum washing machine, roller washing machine), conditioner (electric rice cooker, electric pressure cooker) etc.
The above; be only embodiment of the present utility model; but protection range of the present utility model is not limited thereto, is familiar with this those skilled in the art and should be understood that the content that the utility model includes but not limited to accompanying drawing and describes in embodiment above.Any amendment not departing from function and structure principle of the present utility model all will comprise within the scope of the appended claims.
Claims (7)
1. film key, is characterized in that comprising:
Basic unit,
Circuit layer, be printed in described basic unit, described circuit layer comprises key zone and blind zone, and described key zone has multiple spaced button electrode, and described blind zone has the bucking electrode being looped around periphery, described key zone.
2. film key as claimed in claim 1, it is characterized in that: described film key also comprises trace layer, described trace layer has the contact conductor be connected with described button electrode and described bucking electrode.
3. film key as claimed in claim 2, is characterized in that: described trace layer and described circuit layer are integrally printed in described basic unit.
4. film key as claimed in claim 2, is characterized in that: described contact conductor end forms carbon slurry contact or splicing ear.
5. film key as claimed in claim 1, is characterized in that: described circuit layer is the conductive silver slurry layer be printed in described basic unit, conductive ink layer or carbon pulp layer.
6. film key as claimed in claim 1, is characterized in that: described film key also comprises gum layer and protective layer.
7. film key as claimed in claim 1, is characterized in that: described basic unit is PC film or PET film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420563962.3U CN204332775U (en) | 2014-09-28 | 2014-09-28 | Film key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420563962.3U CN204332775U (en) | 2014-09-28 | 2014-09-28 | Film key |
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| Publication Number | Publication Date |
|---|---|
| CN204332775U true CN204332775U (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420563962.3U Active CN204332775U (en) | 2014-09-28 | 2014-09-28 | Film key |
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| CN (1) | CN204332775U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025130A (en) * | 2015-07-30 | 2015-11-04 | 苏州市智诚光学科技有限公司 | Mobile phone touch screen with sensing lines |
| CN106155406A (en) * | 2015-05-14 | 2016-11-23 | 青岛海尔洗衣机有限公司 | A kind of outlet structure of touch membrane |
| CN107634749A (en) * | 2017-10-27 | 2018-01-26 | 大明电子有限公司 | A kind of conductive film and preparation method, device |
| CN107719066A (en) * | 2017-10-27 | 2018-02-23 | 大明电子有限公司 | A kind of automobile air conditioning control device and touch generation, control method |
| CN108768373A (en) * | 2018-07-03 | 2018-11-06 | 珠海进田电子科技有限公司 | A kind of novel line control machine of gesture control |
| CN110660604A (en) * | 2018-06-28 | 2020-01-07 | 群光电子(苏州)有限公司 | Anti-ghost key membrane switch device |
-
2014
- 2014-09-28 CN CN201420563962.3U patent/CN204332775U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106155406A (en) * | 2015-05-14 | 2016-11-23 | 青岛海尔洗衣机有限公司 | A kind of outlet structure of touch membrane |
| CN106155406B (en) * | 2015-05-14 | 2021-01-12 | 佛山市顺德海尔电器有限公司 | Outlet structure of touch film |
| CN105025130A (en) * | 2015-07-30 | 2015-11-04 | 苏州市智诚光学科技有限公司 | Mobile phone touch screen with sensing lines |
| CN107634749A (en) * | 2017-10-27 | 2018-01-26 | 大明电子有限公司 | A kind of conductive film and preparation method, device |
| CN107719066A (en) * | 2017-10-27 | 2018-02-23 | 大明电子有限公司 | A kind of automobile air conditioning control device and touch generation, control method |
| CN110660604A (en) * | 2018-06-28 | 2020-01-07 | 群光电子(苏州)有限公司 | Anti-ghost key membrane switch device |
| CN108768373A (en) * | 2018-07-03 | 2018-11-06 | 珠海进田电子科技有限公司 | A kind of novel line control machine of gesture control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210428 Address after: 310018 No.2, Songqiao street, Hangzhou Economic and Technological Development Zone, Hangzhou City, Zhejiang Province Patentee after: PANASONIC HOME APPLIANCES (CHINA) Co.,Ltd. Patentee after: PANASONIC APPLIANCES RICE COOKER (HANGZHOU) Co.,Ltd. Address before: Sonjo economic and Technological Development Zone Hangzhou city Zhejiang province 310018 Street No. 6 Building 3 -A Patentee before: PANASONIC HOME APPLIANCES R&D CENTER (HANGZHOU) Co.,Ltd. |
|
| TR01 | Transfer of patent right |