CN114038701A - Thin film key and electronic equipment - Google Patents
Thin film key and electronic equipment Download PDFInfo
- Publication number
- CN114038701A CN114038701A CN202011128173.3A CN202011128173A CN114038701A CN 114038701 A CN114038701 A CN 114038701A CN 202011128173 A CN202011128173 A CN 202011128173A CN 114038701 A CN114038701 A CN 114038701A
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- Prior art keywords
- layer
- conductive
- static
- insulating
- key
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
- H01H13/704—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or structure
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
- H05F3/02—Carrying-off electrostatic charges by means of earthing connections
Landscapes
- Push-Button Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
The application relates to the technical field of electrostatic protection processing, in particular to a film key and electronic equipment, and solves the problem that a conductive silver paste signal line in a circuit layer is burnt due to the fact that a panel cannot completely isolate static electricity in the related art. The method comprises the following steps: the panel, the upper structure layer, the upper circuit layer, the isolation layer, the lower circuit layer, the lower structure layer and the bottom plate are sequentially stacked from top to bottom; and the upper structure layer and the lower structure layer are respectively provided with a static discharge wire. This application lets have a route between static and the ground wire through increasing last structural layer and the lower structural layer that links to each other with the ground wire, and static can be followed the quick ground leakage on the route to guarantee that static can not get into the circuit layer, play electrostatic protection, the effect on protection circuit layer.
Description
Technical Field
The present application relates to the field of electrostatic protection technologies, and in particular, to a thin film key and an electronic device.
Background
The film key is a PET sheet with contacts, is used as a switch on circuit boards such as PCBs, FPCs and the like, and plays a role of a touch switch between a user and an instrument. Compared with the traditional silica gel key, the novel silica gel key has better hand feeling and longer service life. The contact on the film key is positioned at the conductive part on the PCB, when the key is pressed by external force, the central point of the contact is concave and contacts with the circuit on the PCB, thereby forming a loop, and current passes through to realize the corresponding function of the film key.
The existing method for solving the static problem of the thin film key is realized by adopting an insulated thin film key panel, the insulativity of the panel has a certain static protection effect, but the panel of the thin film key cannot be too thick, the panel and the circuit layer cannot be completely sealed, the static still can be coupled to the circuit layer, and the instantaneous large current generated by the static can burn out the conductive silver paste signal wire in the circuit layer.
Disclosure of Invention
To the above problem, the application provides a film button and electronic equipment, has solved in the correlation technique, because the panel can't completely cut off static and lead to the technical problem that the electrically conductive silver thick liquid signal line in the circuit layer burns out.
In a first aspect, the present application provides a membrane key comprising:
the panel, the upper structure layer, the upper circuit layer, the isolation layer, the lower circuit layer, the lower structure layer and the bottom plate are sequentially stacked from top to bottom;
and the upper structure layer and the lower structure layer are respectively provided with a static discharge wire.
Optionally, the upper structure layer and the lower structure are both formed by at least one conductive layer.
Optionally, the upper structural layer and the lower structural layer are both composed of at least one conductive layer and an insulating layer, and positions of the conductive layer and the insulating layer may be exchanged.
Optionally, the upper structure layer is composed of at least one conductive layer, the lower structure layer is composed of at least one conductive layer and an insulating layer, and positions of the conductive layer and the insulating layer can be exchanged.
Optionally, the upper structural layer is composed of at least one conductive layer and an insulating layer, positions of the conductive layer and the insulating layer can be exchanged, and the lower structural layer is composed of at least one conductive layer.
Optionally, in the upper structural layer, the insulating layer is located below the at least one conductive layer.
Optionally, in the lower structural layer, the insulating layer is located above the at least one conductive layer.
Optionally, the conductive layer is a conductive silver paste layer, or a mixed layer of conductive silver paste and graphene.
Optionally, the panel comprises an insulating panel.
Optionally, the base plate comprises an insulating base plate.
In a second aspect, an electronic device comprises a membrane key as described in the first aspect.
The application provides a film button and electronic equipment, intersects in prior art's beneficial effect and includes:
through increasing last structural layer and the lower structural layer that links to each other with the ground wire, let have a route between static and the ground wire, static can be followed the quick ground leakage that leaks on the route to guarantee that static can not get into the circuit layer, play the effect on electrostatic protection, protection circuit layer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a thin film key according to an embodiment of the present application.
Detailed Description
The following detailed description will be provided with reference to the accompanying drawings and embodiments, so that how to apply the technical means to solve the technical problems and achieve the corresponding technical effects can be fully understood and implemented. The embodiments and various features in the embodiments of the present application can be combined with each other without conflict, and the formed technical solutions are all within the scope of protection of the present application.
It can be known from the background art that the existing method for solving the electrostatic problem of the thin film key is realized by adopting an insulating thin film key panel, the insulating property of the panel has a certain electrostatic protection effect, but the panel of the thin film key cannot be made too thick, the panel and a circuit layer cannot be completely sealed, the static electricity is still coupled to the circuit layer, and the conductive silver paste signal line in the circuit layer can be burnt by the instantaneous large current generated by the static electricity.
In view of this, the present application provides a thin film key and an electronic device, which solve the technical problem in the related art that a conductive silver paste signal line in a circuit layer is burnt due to the fact that a panel cannot completely isolate static electricity.
Example one
Fig. 1 is a schematic structural diagram of a film key according to an embodiment of the present application, and as shown in fig. 1, the film key includes:
the panel, go up structural layer, upper circuit layer, isolation layer, lower circuit layer, lower structural layer, bottom plate that stack in proper order from top to bottom.
And the upper structure layer and the lower structure layer are respectively provided with a static discharge wire.
Optionally, the upper structure layer and the lower structure are both formed by at least one conductive layer.
It should be noted that, the upper structure layer and the lower structure layer are used for wrapping the upper and lower circuit layers in the conductive layer, so that when static electricity acts on the film key, the static electricity can more easily enter the upper and lower structure layers due to large area and small resistance of the upper and lower structure layers, and after the static electricity enters the structure layers, the connecting line of the structure layers is connected with the ground wire, so that the static electricity can be quickly discharged to the ground, and the circuit layers of the film key are protected.
The principle of the protection method of the common film key for the static electricity is different from that of the common film key, the common film key is just like a checkpoint is arranged for the protection of the static electricity, the static electricity is blocked outside a circuit layer through an insulating panel, but the panel is limited by the material and the thickness, so that the insulating capability of the common film key is limited, once the static electricity is larger than the value which can be protected by the panel, the checkpoint can be flushed, the static electricity is led into the circuit layer, a conductive silver paste signal line is burnt, the film key performs the static electricity protection in the application in a dredging mode, a passage is formed between the static electricity and a ground wire by adding an upper structure layer and a lower structure layer, the static electricity can be quickly released to the ground from the passage, and the static electricity can not enter the circuit layer.
Optionally, in another embodiment of the present invention, each of the upper structural layer and the lower structural layer is composed of at least one conductive layer and one insulating layer, and positions of the conductive layer and the insulating layer may be exchanged.
It should be noted that the circuit layer can be further protected by adding the insulating layer, so that static electricity which cannot enter the upper and lower structural layers is prevented from entering the circuit layer, and the circuit layer is prevented from being damaged.
Optionally, in another embodiment of the present invention, the upper structural layer is composed of at least one conductive layer, the lower structural layer is composed of at least one conductive layer and an insulating layer, and positions of the conductive layer and the insulating layer may be exchanged.
It should be noted that, in consideration of the importance of the upper and lower circuit layers and the cost, the electrostatic protection strength can be improved or reduced by adjusting the upper and lower structure layers.
Optionally, in another embodiment of the present invention, the upper structural layer is composed of at least one conductive layer and an insulating layer, positions of the conductive layer and the insulating layer may be exchanged, and the lower structural layer is composed of at least one conductive layer.
It should be noted that, most of the static electricity sources during the specific use process of the thin film key are from the panel, and the user generates the static electricity effect when pressing the panel, so in view of increasing the protection strength and the cost, in this embodiment, only the insulating layer is added in the upper structural layer.
Optionally, in the upper structural layer, the insulating layer is located below the at least one conductive layer.
It should be noted that the circuit layer can be further protected by adding the insulating layer, so as to prevent static electricity that cannot enter the upper structure layer from entering the circuit layer and damaging the circuit layer, and in order to allow the upper structure layer to simultaneously play roles of electrostatic dispersion and electrostatic prevention, the insulating layer is disposed below the conductive layer and adjacent to the upper circuit layer.
Optionally, in the lower structural layer, the insulating layer is located above the at least one conductive layer.
It should be noted that the circuit layer can be further protected by adding the insulating layer, so as to prevent static electricity which cannot enter the lower structural layer from entering the circuit layer and damaging the circuit layer, and in order to allow the lower structural layer to simultaneously play roles of dredging static electricity and stopping static electricity, the insulating layer is disposed above the conductive layer and adjacent to the lower circuit layer.
Optionally, the upper and lower structural layers use a polyester film PET as a carrier of conductive silver paste.
Optionally, a mixed layer of conductive silver paste and graphene is used as a conductive layer.
It should be noted that, the present application includes but is not limited to the above conductive silver paste or the technical solution of using the mixed layer of the conductive silver paste and the graphene as the conductive layer, and any conductive layer material capable of achieving the technical effects of the present application is within the scope of the present application.
Optionally, the panel comprises an insulating panel.
The panel layer is generally made of a colorless transparent sheet such as polyester film PET or PC having a thickness of less than 0.25mm, which is silk-screened with patterns and characters. PET, PC and other materials are insulating materials and have a certain protection effect on static electricity.
Optionally, the base plate comprises an insulating base plate.
It should be noted that the bottom plate is a back glue layer, and a PET double-sided tape is more commonly used.
To sum up, the embodiment of the present application provides a film key and an electronic device, and the beneficial effects intersected in the prior art include: through increasing last structural layer and the lower structural layer that links to each other with the ground wire, let have a route between static and the ground wire, static can be followed the quick ground leakage that leaks on the route to guarantee that static can not get into the circuit layer, play the effect on electrostatic protection, protection circuit layer.
Example two
Based on the film key disclosed by the embodiment of the invention, the electronic equipment applying the film key is specifically disclosed.
Another embodiment of the present invention discloses an electronic device, including:
the membrane key according to the first embodiment.
The specific structure and the working principle of the membrane key in the electronic device disclosed in the above embodiment of the present invention can be referred to the corresponding content in the membrane key disclosed in the above embodiment of the present invention, and are not described herein again.
To sum up, the embodiment of the present application provides a film key and an electronic device, and the beneficial effects intersected in the prior art include: through increasing last structural layer and the lower structural layer that links to each other with the ground wire, let have a route between static and the ground wire, static can be followed the quick ground leakage that leaks on the route to guarantee that static can not get into the circuit layer, play the effect on electrostatic protection, protection circuit layer.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although the embodiments disclosed in the present application are described above, the above descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (11)
1. A membrane key, comprising:
the panel, the upper structure layer, the upper circuit layer, the isolation layer, the lower circuit layer, the lower structure layer and the bottom plate are sequentially stacked from top to bottom;
and the upper structure layer and the lower structure layer are respectively provided with a static discharge wire.
2. The film key of claim 1, wherein said upper structural layer and said lower structural layer are each comprised of at least one conductive layer.
3. The membrane key of claim 1, wherein the upper structural layer and the lower structural layer are each composed of at least one conductive layer and an insulating layer, and the positions of the conductive layer and the insulating layer can be exchanged.
4. The membrane key of claim 1, wherein the upper structural layer is formed of at least one conductive layer, the lower structural layer is formed of at least one conductive layer and an insulating layer, and the positions of the conductive layer and the insulating layer are interchangeable.
5. The membrane key of claim 1, wherein the upper structural layer is composed of at least one conductive layer and an insulating layer, and the positions of the conductive layer and the insulating layer can be exchanged, and the lower structural layer is composed of at least one conductive layer.
6. The film key of any one of claims 3 or 5, wherein the insulating layer is located below the at least one conductive layer in the upper structural layer.
7. The film key of any one of claims 3 or 4, wherein the insulating layer is located above the at least one conductive layer in the lower structural layer.
8. The thin film key as claimed in any one of claims 1 to 7, wherein the conductive layer comprises a conductive silver paste layer or a mixed layer of conductive silver paste and graphene.
9. The membrane key of claim 1, wherein the panel comprises an insulating panel.
10. The membrane key of claim 1, wherein the base plate comprises an insulating base plate.
11. An electronic device comprising the film key according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011128173.3A CN114038701A (en) | 2020-10-20 | 2020-10-20 | Thin film key and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011128173.3A CN114038701A (en) | 2020-10-20 | 2020-10-20 | Thin film key and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114038701A true CN114038701A (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011128173.3A Pending CN114038701A (en) | 2020-10-20 | 2020-10-20 | Thin film key and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114038701A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3184562U (en) * | 2013-04-19 | 2013-07-04 | 洋華光電股▲ふん▼有限公司 | Transparent capacitive touch panel |
| CN206834110U (en) * | 2017-04-11 | 2018-01-02 | 东莞市联淳电子科技有限公司 | A kind of antistatic film switch |
| CN110544595A (en) * | 2019-09-07 | 2019-12-06 | 厦门铭彩电子科技有限公司 | Anti-static membrane switch and manufacturing method thereof |
-
2020
- 2020-10-20 CN CN202011128173.3A patent/CN114038701A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3184562U (en) * | 2013-04-19 | 2013-07-04 | 洋華光電股▲ふん▼有限公司 | Transparent capacitive touch panel |
| CN206834110U (en) * | 2017-04-11 | 2018-01-02 | 东莞市联淳电子科技有限公司 | A kind of antistatic film switch |
| CN110544595A (en) * | 2019-09-07 | 2019-12-06 | 厦门铭彩电子科技有限公司 | Anti-static membrane switch and manufacturing method thereof |
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