CN101777902B - Touch key and electronic equipment adopting same - Google Patents
Touch key and electronic equipment adopting same Download PDFInfo
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- CN101777902B CN101777902B CN 200910239519 CN200910239519A CN101777902B CN 101777902 B CN101777902 B CN 101777902B CN 200910239519 CN200910239519 CN 200910239519 CN 200910239519 A CN200910239519 A CN 200910239519A CN 101777902 B CN101777902 B CN 101777902B
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Abstract
The invention provides a touch key and electronic equipment adopting the same, which are suitable for the field of touch key control. The touch key is arranged in the electronic equipment of a metal shell and is downwards sequentially connected with a flexible circuit board, a first conducting material sheet, a piezoelectric ceramics element, a second conducting material sheet and a printed circuit board on the metal shell in a contacting mode. In this way, the problem that the capacitive touch key can not be adopted by the metal shell is solved, thus the product design is free; and due to the waterproof performance, the problem that hands with water can not contact the equipment is solved, the structure of the circuit is simple, and the cost is low.
Description
Technical field
The invention belongs to the button control field, relate in particular to a kind of touch key-press and adopt the electronic equipment of this touch key-press.
Background technology
At present, can use by key control at a lot of electronic equipments.Usually can be divided into 2 types by key control, i.e. contact switch, soft-touch control (contactless).Soft-touch control can be further divided into again the touch key-press of single-point and the touch-screen form on plane.According to operation principle, touch key-press can be divided into 2 kinds of condenser type, inductance types.Adopt the product of touch key-press usually have more convenient to operate, fashion is attractive in appearance, reliability and durability more, no-spark is disturbed for outward appearance, the movement on the machinery-free, simple in structure, many merits can totally enclosedly be installed etc.
Touch key-press in the past will be responded on the pad that metal is fixed in PCB (Printed Circuit Board, printed circuit board (PCB)), PCB will be positioned over the below of touch pad.During use, by the finger contact touch pad, make the induction metal produce induced signal, and pass to pcb board.
Existing capacitance type touch key can not be applied in the electronic equipment of metal face-piece (capacitance type touch key can not adopt the metal face-piece), and can not speckle with water droplet during finger touch.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of touch key-press, is intended to solve existing capacitance type touch key and can not be applied in the electronic equipment of metal face-piece, and can not speckle with the problem of water droplet during finger touch.
The embodiment of the invention is to realize like this, a kind of touch key-press, described touch key-press is arranged in the electronic equipment of metal shell, and described touch key-press down contacts successively at described metal face-piece and is connected with flexible circuit board, the first sheet of conductive material, piezoelectric ceramic piece, the second sheet of conductive material, printed circuit board (PCB).
Further, on described flexible circuit board, over against the position of described the first sheet of conductive material, be provided with pad.
Further, on described printed circuit board (PCB), over against the position of described the second sheet of conductive material, be provided with pad.
Further, described the first sheet of conductive material is annular.
Further, described the first sheet of conductive material is that overall diameter is less than the copper ring of described piezoelectric ceramic piece.
Further, described the second sheet of conductive material is copper sheet.
Another purpose of the embodiment of the invention is to provide a kind of electronic equipment that adopts above-mentioned each described touch key-press.
In an embodiment of the present invention, this touch key-press is applicable in the electronic equipment of metal shell, and this touch key-press down contacts successively at this metal face-piece and is connected with flexible circuit board, the first sheet of conductive material, piezoelectric ceramic piece, the second sheet of conductive material, printed circuit board (PCB).Like this, can not adopt the problem of metal face-piece with regard to having solved capacitance type touch key, make product design freer, can not speckle with the problem of water droplet when water resistance has also solved finger touch, and circuit structure be simple, with low cost.
Description of drawings
Fig. 1 is the structural representation of the touch key-press that provides of the embodiment of the invention;
Fig. 2 is the structural representation of the touch induction circuit that provides of the embodiment of the invention;
Fig. 3 is the inner drop-down schematic diagram of IO_port that the embodiment of the invention provides;
Fig. 4 draws schematic diagram on the IO_port inside that provides of the embodiment of the invention;
Fig. 5 is the IO_port signal schematic representation that the embodiment of the invention provides;
Fig. 6 be the embodiment of the invention provide IO_port is carried out on draw, drop-down implementing procedure figure.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the structure at touch key-press that the embodiment of the invention provides, and this touch key-press can be software unit or hardware cell or the unit soft, that scleroma is closed that is built in electronic equipment.Electronic equipment can be remote controller, gate control system etc.
This touch key-press can be arranged in the electronic equipment of metal shell, and this touch key-press down contacts successively at described metal face-piece and is connected with flexible circuit board, the first sheet of conductive material, piezoelectric ceramic piece, the second sheet of conductive material, printed circuit board (PCB).
In an embodiment of the present invention, on this flexible circuit board, over against the position of described the first sheet of conductive material, be provided with pad.Similarly, on described printed circuit board (PCB), over against the position of described the second sheet of conductive material, be provided with pad.
For the ease of making piezoelectric ceramic piece stressed, as embodiments of the invention, the first sheet of conductive material is annular, further, can adopt overall diameter less than the copper ring of described piezoelectric ceramic piece.
As embodiments of the invention, described the second sheet of conductive material is copper sheet, and certainly, other the electric conducting material such as conductive rubber also can.
See also Fig. 2,3,4,5,6, IO port by drop-down (Fig. 3), namely shows as low level in single-chip microcomputer inside.At this moment, flexible circuit board 1 (Flexible Printed Circuit, when key position FPC) is under pressure, piezoelectric ceramic piece 3 is received the extruding generation deformation of the first sheet of conductive material 2 and the second sheet of conductive material 4, and at the opposite electric charge of upper and lower surface generation, form moment pressure reduction, i.e. P+ among Fig. 2 and P-, wherein P+ voltage is higher than P-, is equivalent to positive and negative polarities.P+ is connected to PCB5 by the circuit on the FPC1, forms circuit shown in Figure 2 with components and parts on the PCB5, forms positive voltage at G and the S interpolar of Q1, so that the D utmost point of N channel field-effect pipe Q1 and the conducting of the S utmost point, the S pole tension is VCC, and IO_port voltage is uprised by low.At this moment, IO_port can be changed on the inside by software (Fig. 5) and to draw (Fig. 4), like this, when the pressure reduction of P+ and P-disappeared, IO_port still was high voltage.When pressure suddenly disappears, between P+ and P-, can form owing to the reverse strain of piezoelectric ceramic piece 3 reverse instantaneous differential pressure again, utmost point P-voltage is higher than P+.At this moment, form negative voltage at the G utmost point and the S interpolar of the Q2 of Fig. 2 so that P-channel field-effect transistor (PEFT) pipe Q2 conducting, the S utmost point and ground together with so that IO_port voltage is by high step-down.So far, finger press and the action of unclamping be converted into the IO_port place as shown in Figure 5 square-wave signal and can be identified by single-chip microcomputer.
IO_port is carried out draw, in the drop-down implementing procedure (Fig. 6), the IO mouth is set to input drop-down first, whether from low to high judges IO mouth voltage again.If not, then continue whether from low to high to judge IO mouth voltage.If so, then the IO mouth is set to draw in the input.Then, whether from high to low to judge IO mouth voltage, if so, then button unclamps; If not, then continue whether from high to low to judge IO mouth voltage.
In sum, in an embodiment of the present invention, this touch key-press is applicable in the electronic equipment of metal shell, and this touch key-press down contacts successively at this metal face-piece and is connected with flexible circuit board, the first sheet of conductive material, piezoelectric ceramic piece, the second sheet of conductive material, printed circuit board (PCB).Like this, can not adopt the problem of metal face-piece with regard to having solved capacitance type touch key, make product design freer, can not speckle with the problem of water droplet when water resistance has also solved finger touch, and circuit structure be simple, with low cost.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. touch key-press, it is characterized in that, described touch key-press is arranged in the electronic equipment of metal shell, and described touch key-press down contacts successively at described metal shell and is connected with flexible circuit board, the first sheet of conductive material, piezoelectric ceramic piece, the second sheet of conductive material, printed circuit board (PCB)
Described the first sheet of conductive material is annular, and is that overall diameter is less than the copper ring of described piezoelectric ceramic piece.
2. touch key-press according to claim 1 is characterized in that, over against the position of described the first sheet of conductive material, is provided with pad on described flexible circuit board.
3. touch key-press according to claim 1 is characterized in that, over against the position of described the second sheet of conductive material, is provided with pad on described printed circuit board (PCB).
4. touch key-press according to claim 1 is characterized in that, described the second sheet of conductive material is copper sheet.
5. electronic equipment that adopts each described touch key-press of claim 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910239519 CN101777902B (en) | 2009-12-31 | 2009-12-31 | Touch key and electronic equipment adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910239519 CN101777902B (en) | 2009-12-31 | 2009-12-31 | Touch key and electronic equipment adopting same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101777902A CN101777902A (en) | 2010-07-14 |
| CN101777902B true CN101777902B (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910239519 Active CN101777902B (en) | 2009-12-31 | 2009-12-31 | Touch key and electronic equipment adopting same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101777902B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924543B (en) | 2010-07-22 | 2013-08-28 | 鸿富锦精密工业（深圳）有限公司 | Electronic equipment and key connecting structure thereof |
| CN106301435A (en) * | 2016-08-16 | 2017-01-04 | 深圳天珑无线科技有限公司 | Mobile terminal |
| CN214256810U (en) * | 2020-12-09 | 2021-09-21 | 华为技术有限公司 | Piezoelectric ceramic waterproof structure, piezoelectric ceramic device and electronic equipment |
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2009
- 2009-12-31 CN CN 200910239519 patent/CN101777902B/en active Active
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| Publication number | Publication date |
|---|---|
| CN101777902A (en) | 2010-07-14 |
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Effective date of registration: 20171227 Address after: 523000 Guangdong Province, Huizhou Dayawan three Road West xiangshuihe sea in Longhai science and Technology Industrial Park Patentee after: Huizhou chuangrongfa Industrial Co., Ltd. Address before: 518109 Shenzhen, Shenzhen City, Guangdong Province, Baoan District Longhua Street oil pine community on the top of the oil pine mountain industrial area 2 floor Patentee before: Shenzhen C&D Electronics Co., Ltd. |