CN211557246U - Touch key - Google Patents
Touch key Download PDFInfo
- Publication number
- CN211557246U CN211557246U CN202020199794.XU CN202020199794U CN211557246U CN 211557246 U CN211557246 U CN 211557246U CN 202020199794 U CN202020199794 U CN 202020199794U CN 211557246 U CN211557246 U CN 211557246U
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- Prior art keywords
- touch
- copper foil
- push rod
- pressure
- insulating
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000011889 copper foil Substances 0.000 claims abstract description 57
- 239000002184 metal Substances 0.000 claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 238000009413 insulation Methods 0.000 claims abstract description 18
- 230000008859 change Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
The utility model discloses a touch key, which comprises an insulating panel, a touch conductive structure, a spring, an insulating push rod, a pressure metal sheet and a printed circuit board; the insulating panel, the insulating push rod and the printed circuit board are sequentially arranged from top to bottom; a touch conductive structure is attached to the lower side surface of the specified touch area of the insulating panel; the upper side of the printed circuit board is covered with a touch copper foil and a pressure copper foil); each touch copper foil is respectively and correspondingly electrically connected to each touch conductive structure; the pressure metal sheet is arranged between the lower side surface of the insulation push rod and the pressure copper foil and has a distance with the pressure copper foil; the touch copper foil and the pressure copper foil are respectively connected to the detection circuit. The utility model discloses a touch button can prevent the mistake and touch and simple structure, with low costs.
Description
Technical Field
The utility model relates to a switch, in particular to touch button.
Background
Touch sensing has the advantages of wear resistance, long service life, no maintenance and the like, so that the touch switch is widely applied. With the continuous development and progress of science and technology, the mechanical structures in various fields tend to be simplified, and the human-computer interaction is converted from the original mechanical switch to the touch switch, so that the science and technology feeling and the competitiveness of the product are improved.
For example, in the automotive field, most interior conventional mechanical switches have been gradually replaced with tactile switches. Most of the existing touch switches are single-point touch switches, and the touch surfaces of the switch keys are connected to the main circuit board through the thin-film circuit board or other conducting structures, so that electric signal conduction is guaranteed. When the touch is performed, the capacitance between the human body and the conducting structure changes, and whether the capacitance changes is a touch signal is judged by detecting the capacitance change, so that the next feedback is made, such as lighting or color changing of a signal lamp. However, since the capacitance variation of the structure exceeds the set value, it is determined that there is a touch signal, and thus, if a human body touches the touch area, it is determined that a trigger function is required, and a false touch phenomenon may occur. The accidental touch does not cause serious problems, but if the touch switch is provided with functions related to safety, such as a child lock, the accidental touch prevention is particularly important.
Meanwhile, when the capacitive switch is applied to a combination switch, misoperation is easily caused, particularly in a vehicle-mounted system, the requirement on safety is extremely high, and the requirement on preventing mistaken touch cannot be met by a conventional touch switch.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a touch button, can prevent the mistake and touch and simple structure, with low costs.
In order to solve the technical problem, the utility model provides a touch key, it includes insulating panel 1, touch conductive structure 2, spring 3, insulating push rod 5, pressure sheetmetal 7 and printed wiring board 4;
the insulating panel 1, the insulating push rod 5 and the printed circuit board 4 are sequentially arranged from top to bottom;
a touch conductive structure 2 is attached to the lower side of a specified touch area of the insulating panel 1;
the upper side of the printed circuit board 4 is covered with a touch copper foil 41 and a pressure copper foil 42;
each touch copper foil 41 is respectively and correspondingly electrically connected to each touch conductive structure 2;
the pressure metal sheet 7 is arranged between the lower side surface of the insulation push rod 5 and the pressure copper foil 42 and has a distance with the pressure copper foil 42;
the touch copper foil 41 and the pressure copper foil 42 are used for connection to a detection circuit, respectively.
Preferably, the pressure metal sheet 7 is fixedly installed on the lower side of the insulation push rod 5 or fixedly installed on the upper side of the printed circuit board 4.
Preferably, the insulating push rod 5 is made of plastic.
Preferably, the touch conductive structure 2 is a touch metal sheet or a thin film circuit board.
Preferably, the touch key further comprises a spring 3;
the touch conductive structure 2 is a touch metal sheet;
the insulating push rod 5 is provided with an upper through hole and a lower through hole;
a spring 3 passes through an upper and lower through hole, the upper end of which is connected with a touch metal sheet, and the lower end of which is connected with a touch copper foil 41.
Preferably, the touch key further comprises a shell 6 and a base 8;
the insulating panel 1, the touch conductive structure 2, the spring 3, the insulating push rod 5, the pressure metal sheet 7 and the printed circuit board 4 are arranged in the shell 6;
the insulating push rod 5 moves up and down relatively along a guide structure on the side wall of the shell 6;
the base 8 is fixedly arranged at the lower end of the shell 6.
Preferably, a movement stop structure is provided on the housing 6 for limiting the maximum downward movement position of the insulation push rod 5.
Preferably, an elastic structure is provided between the insulating push rod 5 and the housing 6, and the elastic structure enables the insulating push rod 5 to be rebounded after the downward pressure applied to the insulating push rod 5 is removed.
Preferably, the touch key further comprises a detection circuit;
the detection circuit takes the electric signal on each touch copper foil 41 as a touch signal corresponding to a touch area, and takes the electric signal on the pressure copper foil 42 as a pressure signal;
when the touch signal corresponding to the touch area exceeds a set touch threshold value and the pressure signal exceeds a set pressure threshold value, the detection circuit outputs a corresponding touch area effective trigger signal, otherwise, the output of the corresponding touch area effective trigger signal is forbidden.
Preferably, a mark is arranged in a specified touch area of the insulating panel 1;
when the detection circuit outputs an effective touch signal, the mark arranged in the specified touch area of the insulating panel 1 is lightened or discolored;
the touch copper foil 41 is hollow;
the insulating push rod 5 is attached to the lower side surface of the touch area insulating panel 1.
The utility model discloses a touch button, realize the capacitance variation through special structural design, utilize touch metal sheet 2 and printed wiring board 4 to go up touch copper foil 41 and make up into the touch and switch on the circuit and realize touch signal, utilize pressure metal sheet 7 and printed wiring board 4 to go up pressure copper foil 42 and make up into and press down and switch on the circuit and realize pressure feedback signal, moreover, the steam generator is simple in structure, low cost, touch signal and pressure feedback signal can be detected, can be according to whether can detect touch signal and pressure feedback signal simultaneously and judge whether effective touch, thereby realize preventing the mistake and touch the function.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required for the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a cross-sectional view of an embodiment of a touch key of the present invention;
fig. 2 is a top view of an embodiment of the touch key of the present invention.
Description of the reference numerals
1 insulating panel; 10 touch area; 2 touching the conductive structure; 3, a spring; 4, printing a circuit board; 41 touch copper foil; 42 pressure copper foil; 5 insulating the push rod; 6, a shell; 7 a pressure metal sheet; 8, a base.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Example one
As shown in fig. 1 and 2, the touch key includes an insulating panel 1, a touch conductive structure 2, a spring 3, an insulating push rod 5, a pressure metal sheet 7 and a printed circuit board 4;
the insulating panel 1, the insulating push rod 5 and the printed circuit board 4 are sequentially arranged from top to bottom;
a touch conductive structure 2 is attached to the lower side of the touch area 10 of the insulating panel 1;
the upper side of the printed circuit board 4 is covered with a touch copper foil 41 and a pressure copper foil 42;
each touch copper foil 41 is respectively and correspondingly electrically connected to each touch conductive structure 2;
the pressure metal sheet 7 is arranged between the lower side surface of the insulation push rod 5 and the pressure copper foil 42 and has a distance with the pressure copper foil 42;
the touch copper foil 41 and the pressure copper foil 42 are used for connection to a detection circuit, respectively.
Preferably, the pressure metal sheet 7 is fixedly installed on the lower side of the insulation push rod 5 or fixedly installed on the upper side of the printed circuit board 4.
Preferably, the insulating push rod 5 is made of plastic.
Preferably, the touch conductive structure 2 is a touch metal sheet, a thin film circuit board or other conductive structures.
In the touch key of the first embodiment, the insulating panel 1 is used as a touch surface of the appearance piece, the touch area 10 is defined on the insulating panel 1, the insulating panel 1 and the insulating push rod 5 are relatively fixed, and the touch conductive structure 2 is attached to the lower side of the touch area of the insulating panel 1 and fully contacts with the insulating panel 1; the capacitance between the human body and the conduction circuit composed of the touch conductive structure 2 and the touch copper foil 41 on the printed circuit board 4 changes, so that the detection circuit can detect the touch signal. The insulation panel 1 and the insulation push rod 5 are relatively fixed, the pressure metal sheet 7 moves downwards along with the insulation push rod 5 to deform or move, in an initial state, the pressure metal sheet 7 corresponds to the horizontal position of the pressure copper foil 42 on the printed circuit board 4 and has a certain height distance, when pressure is applied to the insulation panel 1, the insulation push rod 5 moves downwards to press the pressure metal sheet 7 or directly drives the pressure metal sheet 7 to move downwards, the distance between the pressure metal sheet 7 and the pressure copper foil 42 on the printed circuit board 4 changes, capacitance change is generated, and therefore a detection circuit can detect a pressure feedback signal.
The touch key of the first embodiment is designed to realize capacitance change through a special structure, a touch conduction circuit is formed by combining the touch metal sheet 2 and the touch copper foil 41 on the printed circuit board 4 to realize a touch signal, and a press conduction circuit is formed by combining the pressure metal sheet 7 and the pressure copper foil 42 on the printed circuit board 4 to realize a pressure feedback signal. The utility model is suitable for a touch switch who has the mistake of preventing to touch the requirement.
Example two
Based on the first embodiment, the touch key further comprises a spring 3;
the touch conductive structure 2 is a touch metal sheet;
the insulating push rod 5 is provided with an upper through hole and a lower through hole;
touch copper foils 41 are respectively covered on the upper side surface of the printed circuit board 4 corresponding to the upper through hole and the lower through hole;
a spring 3 passes through an upper and lower through hole, the upper end of which is connected with a touch metal sheet, and the lower end of which is connected with a touch copper foil 41.
In the touch key of the second embodiment, the spring 3 penetrates through the upper and lower through holes of the insulating push rod 5, two ends of the spring are respectively connected with the touch metal sheet and the touch copper foil 41 on the printed circuit board 4, the touch metal sheet and the spring 3 are combined to form a touch conduction circuit to realize a touch signal, a human body touches the touch area of the insulating panel 1, and the capacitance between the human body and the conduction circuit formed by the touch metal sheet, the spring 3 and the touch copper foil 41 on the printed circuit board 4 changes, so that the detection circuit can detect the touch signal. The compression force of the spring 3 can realize the automatic resilience function of the insulation panel 1 after being pressed, and the structure is simple, the cost is low, and the operation is convenient.
EXAMPLE III
According to the first embodiment, the touch key further comprises a shell 6 and a base 8;
the insulating panel 1, the touch conductive structure 2, the spring 3, the insulating push rod 5, the pressure metal sheet 7 and the printed circuit board 4 are arranged in the shell 6;
the insulating push rod 5 moves up and down relatively along a guide structure on the side wall of the shell 6;
the base 8 is fixedly arranged at the lower end of the shell 6.
Preferably, a movement stopping structure is arranged on the shell 6 for limiting the maximum downward movement position of the insulation push rod 5 and preventing the pressing force from being excessive and damaging the pressure metal sheet 7 or the copper foil on the printed circuit board 4.
Preferably, an elastic structure is arranged between the insulating push rod 5 and the housing 6, and the elastic structure can enable the insulating push rod 5 to rebound after the downward pressure applied to the insulating push rod 5 is eliminated, so that the automatic rebound function of the pressed insulating panel 1 is realized.
In the touch key of the third embodiment, when pressure is applied to the insulating panel 1, the insulating push rod 5 moves downward along the guide structure of the housing 6 along with the insulating panel 1.
Example four
Based on the first embodiment, the touch key further comprises a detection circuit;
the detection circuit takes the electric signal on each touch copper foil 41 as a touch signal corresponding to a touch area, and takes the electric signal on the pressure copper foil 42 as a pressure signal;
when the touch signal corresponding to the touch area exceeds a set touch threshold value and the pressure signal exceeds a set pressure threshold value, the detection circuit outputs a corresponding touch area effective trigger signal, otherwise, the output of the corresponding touch area effective trigger signal is forbidden.
Preferably, the predetermined touch area of the insulating panel 1 is provided with a mark.
Preferably, when the detection circuit outputs an effective touch signal, the mark provided in the predetermined touch region of the insulating panel 1 is turned on or changed in color.
Preferably, the touch copper foil 41 is hollow to avoid the illumination area of the mark.
Preferably, the insulating push rod 5 is closely attached to the lower side of the touch area insulating panel 1.
In the touch key of the fourth embodiment, when a finger touches a region (i.e., a touch region) corresponding to the touch conductive structure 2, an electrical signal on the touch copper foil 41 changes, and a touch capacitance changes; when a finger presses the touch area (a certain pressure is given to the touch area), the electric signal on the pressure copper foil 42 changes, and the pressure capacitance changes; when the touch signal corresponding to the touch area exceeds a set touch threshold and the pressure signal exceeds a set pressure threshold, the detection circuit outputs an effective trigger signal corresponding to the touch area, and the touch area is considered as an effective touch, so that the function of preventing false touch is realized.
In the touch key of the fourth embodiment, only when the touch signal or the pressure signal exceeds the set threshold, the detection circuit judges that the touch signal or the pressure signal is mistakenly touched, and the switch function cannot be realized; the detection circuit outputs effective touch signals when detecting that the two signals exceed a set threshold value at the same time, so that the function of preventing false touch is realized.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A touch key is characterized by comprising an insulating panel (1), a touch conductive structure (2), a spring (3), an insulating push rod (5), a pressure metal sheet (7) and a printed circuit board (4);
the insulation panel (1), the insulation push rod (5) and the printed circuit board (4) are arranged from top to bottom in sequence;
a touch conductive structure (2) is attached to the lower side of a specified touch area (10) of the insulating panel (1);
the upper side surface of the printed circuit board (4) is covered with a touch copper foil (41) and a pressure copper foil (42);
each touch copper foil (41) is correspondingly and electrically connected to each touch conductive structure (2) respectively;
the pressure metal sheet (7) is arranged between the lower side surface of the insulation push rod (5) and the pressure copper foil (42) and has a distance with the pressure copper foil (42);
the touch copper foil (41) and the pressure copper foil (42) are respectively connected to the detection circuit.
2. The touch key of claim 1,
the pressure metal sheet (7) is fixedly arranged on the lower side surface of the insulation push rod (5) or is fixedly arranged on the upper side surface of the printed circuit board (4).
3. The touch key of claim 1,
the insulating push rod (5) is made of plastic.
4. The touch key of claim 1,
the touch conductive structure (2) is a touch metal sheet or a film circuit board.
5. The touch key of claim 1,
the touch key further comprises a spring (3);
the touch conductive structure (2) is a touch metal sheet;
the insulating push rod (5) is provided with an upper through hole and a lower through hole;
touch copper foils (41) are respectively covered on the upper side surface of the printed circuit board (4) corresponding to the upper through hole and the lower through hole;
a spring (3) passes through an upper through hole and a lower through hole, the upper end of the spring is connected with a touch metal sheet, and the lower end of the spring is connected with a touch copper foil (41).
6. The touch key of claim 1,
the touch key further comprises a shell (6) and a base (8);
the insulating panel (1), the touch conductive structure (2), the spring (3), the insulating push rod (5), the pressure metal sheet (7) and the printed circuit board (4) are arranged in the shell (6);
the insulating push rod (5) moves up and down relatively along a guide structure on the side wall of the shell (6);
the base (8) is fixedly arranged at the lower end of the shell (6).
7. The touch key of claim 6,
a movement stop structure is arranged on the shell (6) and used for limiting the maximum downward movement position of the insulation push rod (5).
8. The touch key of claim 6,
an elastic structure is arranged between the insulating push rod (5) and the shell (6), and the elastic structure can enable the insulating push rod (5) to rebound after the downward pressure applied to the insulating push rod (5) is eliminated.
9. The touch key of claim 1,
the touch key further comprises a detection circuit;
the detection circuit takes the electric signal on each touch copper foil (41) as a touch signal corresponding to a touch area, and takes the electric signal on the pressure copper foil (42) as a pressure signal;
when the touch signal corresponding to the touch area exceeds a set touch threshold value and the pressure signal exceeds a set pressure threshold value, the detection circuit outputs a corresponding touch area effective trigger signal, otherwise, the output of the corresponding touch area effective trigger signal is forbidden.
10. The touch key of claim 9,
a mark is arranged in a specified touch area of the insulating panel (1);
when the detection circuit outputs an effective touch signal, the mark arranged in the specified touch area of the insulating panel (1) is lightened or discolored;
the touch copper foil (41) is hollow;
the insulating push rod (5) is attached to the lower side face of the insulating panel (1) of the touch area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020199794.XU CN211557246U (en) | 2020-02-24 | 2020-02-24 | Touch key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020199794.XU CN211557246U (en) | 2020-02-24 | 2020-02-24 | Touch key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211557246U true CN211557246U (en) | 2020-09-22 |
Family
ID=72494350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020199794.XU Active CN211557246U (en) | 2020-02-24 | 2020-02-24 | Touch key |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211557246U (en) |
-
2020
- 2020-02-24 CN CN202020199794.XU patent/CN211557246U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 650, Qingda Road, Heqing Industrial Zone, Pudong New Area, Shanghai 201201 Patentee after: Marquardt Electronic Technology (Shanghai) Co.,Ltd. Country or region after: China Address before: No. 650, Qingda Road, Pudong New Area, Shanghai 201201 Patentee before: MARQUARDT SWITCHES (SHANGHAI) Co.,Ltd. Country or region before: China |