CN203055742U - Film key - Google Patents
Film key Download PDFInfo
- Publication number
- CN203055742U CN203055742U CN 201320038884 CN201320038884U CN203055742U CN 203055742 U CN203055742 U CN 203055742U CN 201320038884 CN201320038884 CN 201320038884 CN 201320038884 U CN201320038884 U CN 201320038884U CN 203055742 U CN203055742 U CN 203055742U
- Authority
- CN
- China
- Prior art keywords
- metal clips
- film
- pet film
- pad
- metal elastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Push-Button Switches (AREA)
Abstract
The utility model relates to the technical filed of touch keys and provides a film key. The film key comprises metal elastic pieces, a PET film isolation layer and a PET film surface layer which are sequentially installed above a circuit board, wherein the PET film isolation layer is provided with metal elastic piece mounting holes, the metal elastic pieces are mounted in the mounting holes, the middle part of each metal elastic piece is provided with a gasket above, each gasket is abutted against the corresponding metal elastic piece, the PET film surface layer covers the top surface of the PET film isolation layer and covers the metal elastic pieces and the gaskets thereon. The film key provided by the utility model has the beneficial effects that the strength of a conductive sheet is improved through arranging the gasket at the position above the middle part of each metal elastic piece, the metal elastic piece is enabled to form good electrical contact with the circuit board, the electrical contact effect, the strength and the service life of the film key are improved, and the film key has better hand feeling which is similar to the feeling of touching a bump.
Description
Technical field
The utility model relates to a kind of button technical field, relates to a kind of film key structure of excellent operation feel more specifically.
Background technology
Along with development of electronic technology, present portable electronic product, instruction input as mobile phone, PDA and Satellite Navigation Set, mostly be to cooperate elastic structure voltage-controlled press element or to be provided with trigger (pressure key) by film key, input as user's control command, on the structural design of film key, will directly react the output of its electric contact and keying signal, contact and the signal quality so there is good press-key structure design will promote with the electric of electric terminal.
Metal clips on the film key is positioned at the conducting position (major part is positioned at the golden finger top on the wiring board) on the pcb board, and when being subjected to pressing, the central point of shell fragment is recessed, touch the circuit on the PCB, thereby the formation loop, electric current passes through, and entire product just is able to operate as normal.Can be several metal clipss by certain position, the PET of use band glue fits together them, and convenient assembling is fast accurately located etc.The generally position of arranging each metal clips according to PAD (pad) position corresponding on the wiring board, and other components and parts arranges corresponding clearance position and location hole etc.This product is referred to as the metal clips conducting film, or metal dome switches, the Dome sheet.The metal clips conducting film is a PET thin slice that comprises metal clips, is used on the wiring boards such as PCB or FPC and uses as switch, play an important effect by the of bonding switch between user and instrument.
Compare with traditional single use silica gel push-button, supporting employing film key has better feel, longer life-span, also can improve the production efficiency of all types of switches that use conducting film indirectly.
Existing metal clips conducting film mainly is divided into single layer structure and double-decker, and single layer structure is the below that metal clips is positioned at PET film top layer, air vent hole is arranged to guarantee basic feel and use.What double-decker was different with single layer structure is, it is many one deck PET film interlayer, and metal clips is affixed on the PET film top layer better.Effectively press stroke but film key can not reach by key contacts with the plane, make operating handle relatively poor, it is stiff to press button.
The utility model content
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is, a kind of film key that has better operating handle and excellent electrical property contact is provided, comprise the metal clips that is installed on the wiring board top successively, PET film interlayer, PET film top layer, described PET film interlayer offers the metal clips installing hole, described metal clips is installed in the described installing hole, the top, middle part of described each metal clips is provided with a pad, described each pad metal clips corresponding with it offsets, described PET film top layer covers described PET film interlayer end face, and is coated on described metal clips and goes up square washer.
Further, described pad is PET pad, PC pad or silica gel pad.
Further, described pad is circular gasket, 0.3 to 0.8 times of the diameter that described circular gasket diameter is its corresponding metal clips.
Further, described spacer thickness is 0.03 millimeter to 0.18 millimeter.
Further, be formed with air vent hole or air channel on the described metal clips.
Further, described PET film top layer, PET film interlayer add gum for the PET base material.
Further, described metal clips is stainless steel metal sheet electroplate or nickel plating or that do not have coating.
The utility model compared with prior art, has following advantage by adopting technique scheme:
1, by installing a pad at each metal clips middle part upper position, can effectively improve the button operation feel, make that forming excellent electrical property between metal clips and the wiring board contact, improve the electrical contact effect of film key, reach useful life.
Description of drawings
Fig. 1 is the cutaway view of embodiment of the present utility model;
Fig. 2 is stereogram of the present utility model.
Embodiment
Now with embodiment the utility model is further specified by reference to the accompanying drawings.
As a specific embodiment, as depicted in figs. 1 and 2, a kind of film key that has better feel and excellent electrical property contact of the present utility model, comprise the metal clips 4 that is installed on wiring board 5 tops successively, PET film interlayer 3, PET film top layer 1, described PET film interlayer 3 offers metal clips 4 installing holes, described metal clips 4 is installed in the described installing hole, the top, middle part of described each metal clips 4 is provided with a pad 2, described pad 2 is the PET pad, PC pad or silica gel pad, described pad 2 is circular gasket, 0.3 to 0.8 times of the diameter that described circular gasket diameter is its corresponding metal clips, and described spacer thickness is 0.03 millimeter to 0.18 millimeter.
This each pad 2 is arranged on the position that the metal clips corresponding with it 4 offsets just, adds the PET film top layer 1 that gum makes with the PET base material again and covers described PET film interlayer 3 end faces, and be coated on described metal clips 4 and go up square washer 2.
By installing a pad at each metal clips middle part upper position, can effectively improve the button operation feel, make that forming excellent electrical property between metal clips and the wiring board contact, improved the electrical contact effect of film key, reach useful life.
As a kind of deformed configurations, described pad can also be made into scope less than annular, ellipse, the square or profiled spacer of metal clips face, reaches same effect.
As a kind of improved plan, be formed with air channel or air vent hole 6 on the described metal clips.Air channel on the double-decker conducting film can more effectively prevent that pet layer from being scratched by the burr burr of shell fragment etc., also can stop dust to enter pet layer simultaneously.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in not breaking away from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (7)
1. film key, it is characterized in that: comprise the metal clips, PET film interlayer, the PET film top layer that are installed on the wiring board top successively, described PET film interlayer offers the metal clips installing hole, described metal clips is installed in the described installing hole, the top, middle part of described each metal clips is provided with a pad, described each pad metal clips corresponding with it offsets, described PET film top layer covers described PET film interlayer end face, and is coated on described metal clips and goes up square washer.
2. a kind of film key according to claim 1, it is characterized in that: described pad is PET pad, PC pad or silica gel pad.
3. a kind of film key according to claim 1, it is characterized in that: described pad is circular gasket, 0.3 to 0.8 times of the diameter that described circular gasket diameter is its corresponding metal clips.
4. according to the arbitrary described a kind of film key of claim 1 to 3, it is characterized in that: described spacer thickness is 0.03 millimeter to 0.18 millimeter.
5. according to the arbitrary described a kind of film key of claim 1 to 3, it is characterized in that: be formed with air vent hole or air channel on the described metal clips.
6. according to the arbitrary described a kind of film key of claim 1 to 3, it is characterized in that: described PET film top layer, PET film interlayer add gum for the PET base material.
7. according to the arbitrary described a kind of film key of claim 1 to 3, it is characterized in that: described metal clips is stainless steel metal sheet electroplate or nickel plating or that do not have coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320038884 CN203055742U (en) | 2013-01-24 | 2013-01-24 | Film key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320038884 CN203055742U (en) | 2013-01-24 | 2013-01-24 | Film key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203055742U true CN203055742U (en) | 2013-07-10 |
Family
ID=48738669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320038884 Expired - Lifetime CN203055742U (en) | 2013-01-24 | 2013-01-24 | Film key |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203055742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105607747A (en) * | 2016-01-29 | 2016-05-25 | 合肥联宝信息技术有限公司 | Keyboard and notebook computer comprising same |
-
2013
- 2013-01-24 CN CN 201320038884 patent/CN203055742U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105607747A (en) * | 2016-01-29 | 2016-05-25 | 合肥联宝信息技术有限公司 | Keyboard and notebook computer comprising same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |
|
| CX01 | Expiry of patent term |