CN203205301U - Double-pole single throw structure - Google Patents
Double-pole single throw structure Download PDFInfo
- Publication number
- CN203205301U CN203205301U CN 201320166017 CN201320166017U CN203205301U CN 203205301 U CN203205301 U CN 203205301U CN 201320166017 CN201320166017 CN 201320166017 CN 201320166017 U CN201320166017 U CN 201320166017U CN 203205301 U CN203205301 U CN 203205301U
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- China
- Prior art keywords
- circuit board
- printed circuit
- double
- switch
- key structure
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Abstract
The utility model discloses a double-pole single throw structure which, in order, is provided with a button cap, a flexible print circuit board and a rigid printed circuit board. A button switch is attached on the upper surface of the rigid printed circuit board, and a capacitance switch is arranged on the upper surface of the flexible print circuit board. The capacitance switch is arranged on the FPC and the button switch is arranged on the rigid PCB, so that two signals are generated by only one button pressing when a user presses the button cap, and the signals are stable. Moreover, influence on the touch of the button is less and the structure is long in service life.
Description
Technical field
The utility model relates to a kind of key switch, relates in particular to a kind of double-contact press-key structure.
Background technology
Because the particularity of medicine equipment, when making medicine equipment carry out motor performance by next button, need to trigger simultaneously two groups of mechanical switch signals, a signal is processed as software, the another one signal to prevent that the software race from flying or the switch damage causes the improper motion of apparatus, causes hazard to person as hardware handles, only have software and hardware all no problem, Medical Devices are just done mechanical movement.Therefore, must there be two groups of switches to guarantee the fail safe of motor function during by next button as the operator.Double-contact button of the prior art (Double-pole Single Throw, DPST) typically use a flexible printed circuit board (Flexible Printed Circuit, the switch of switch FPC) and a film key (DOME) consists of the two-way mechanical switch, concrete structure mainly comprises button cap, FPC and rigid printed circuit board (Printed Circuit Board, PCB), generally between FPC and rigid PCB, film key is set, triggers simultaneously the switch on FPC and the rigid PCB when pushing button.But, because frequent use and screw are fixed, be easy to make the switch on the FPC always closed, cause the invalidating signal on this road, cause the system motion fault.
The utility model content
Technical problem to be solved in the utility model provides a kind of double-contact press-key structure, can realize one-touch triggering for generating two paths of signals, and signal stabilization, and is little on the handfeel of keys impact, long service life.
The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of double-contact press-key structure, be disposed with button cap, flexible printed circuit board and rigid printed circuit board, the upper surface of described rigid printed circuit board is pasted with key switch, wherein, the upper surface of described flexible printed circuit board is provided with capacitance switch.
Above-mentioned double-contact press-key structure, wherein, the material of described button cap is plastics, rubber or silica gel.
Above-mentioned double-contact press-key structure, wherein, the central shaft of the central shaft of described key switch in the vertical direction and button cap in the vertical direction overlaps.
Above-mentioned double-contact press-key structure, wherein, the central shaft of the central shaft of described capacitance switch in the vertical direction and button cap in the vertical direction overlaps.
Above-mentioned double-contact press-key structure, wherein, the shape of described flexible printed circuit board and rigid printed circuit board, in the same size.
Above-mentioned double-contact press-key structure, wherein, described flexible printed circuit board be shaped as rectangle, square, circle or oval, described rigid printed circuit board be shaped as rectangle, square, circle or oval.
Above-mentioned double-contact press-key structure, wherein, described flexible printed circuit board is connected buckle with rigid printed circuit board and connects.
Above-mentioned double-contact press-key structure, wherein, described button cap directly is mounted on described flexible printed circuit board towards a side of described capacitance switch.
Above-mentioned double-contact press-key structure, wherein, the edge of described button cap stretches out, and is formed for holding the shell of described flexible printed circuit board and described rigid printed circuit board.
Above-mentioned double-contact press-key structure, wherein, described shell and described rigid printed circuit board are complementary.
The utility model contrast prior art has following beneficial effect: the double-contact press-key structure that the utility model provides, by at FPC capacitance switch being set, at rigid PCB key switch is set, after finger pushes button cap, because finger has capacitance characteristic, can increase the original electric capacity of capacitance switch, thereby change the capacitor charge and discharge time, and then system learns whether capacitance switch is pressed, and down by the sound that will hear that key switch is pressed, so just forms the two-stage button again.When unclamping, capacitance switch and key switch two-stage button are released simultaneously, so the user only feels the stroke of one-level button, and capacitance switch can the conducting because of extruding, must have finger to press just and respond.Therefore can very stably realize the closure of two groups of switches, no matter the pine that screw is twisted or tight, whether switch is often closed, under the prerequisite without any operation, switch on the two-layer pcb board is opened all the time, can well safeguard the stability of medicine equipment, and have the longer life-span than traditional double contact button structure.
Description of drawings
Fig. 1 is the double-contact press-key structure schematic diagram among the utility model embodiment.
Among the figure:
1 button cap, 11 shells, 2 capacitance switchs
3 flexible printed circuit boards, 4 key switches, 5 rigid printed circuit boards
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
Fig. 1 is the double-contact press-key structure schematic diagram among the embodiment.
See also Fig. 1, the double-contact press-key structure that the utility model provides comprises the button cap 1 that sets gradually, flexible printed circuit board 3 and rigid printed circuit board 5, be pasted with key switch 4 on the rigid printed circuit board 1, flexible printed circuit board 3 is provided with capacitance switch 2, button cap 1 and capacitance switch 2, key switch 4 spatially all has overlapping, be button cap 1 down by in, can be pressed into simultaneously capacitance switch 2 and key switch 4, in the present embodiment, preferably capacitance switch 2 and key switch 4 are arranged on button cap 1 under, namely capacitance switch 2, the central shaft of the central shaft of key switch 4 in the vertical directions and button cap 1 in the vertical direction overlaps.
The material of button cap 1 can be working of plastics, rubber or silica gel commonly used; Button cap 1 can directly be mounted on the flexible printed circuit board 3, simultaneously better, be positioned at capacitance switch 2 and key switch 4 directly over, flexible printed circuit board 3 and rigid printed circuit board 5 can link together by commonly used connector such as buckle (not shown); In another embodiment, also the edge of button cap 1 can be stretched out, formation can be held the shell 11 of flexible printed circuit board 3 and rigid printed circuit board 5; Preferably, the shape of flexible printed circuit board 3 and rigid printed circuit board 5, in the same size, the peripheral shape of shell 11, size and flexible printed circuit board 3, the shape of rigid printed circuit board 5, size are complementary, flexible printed circuit board 3 is connected with rigid printed circuit board by being installed in the shell 11 after the connector connection or directly being installed in the shell 11, the shape of flexible printed circuit board 3 and rigid printed circuit board 5 is rectangle, square, circle or oval etc., can design according to different needs.
The double-contact press-key structure that the utility model provides, after finger pushes button cap 1, because finger has capacitance characteristic, can increase capacitance switch 2 original electric capacity, thereby change the capacitor charge and discharge time, and then system learns that whether capacitance switch 2 is pressed, and down by the sound that will hear that key switch 4 is pressed, so just forms the two-stage button again.When unclamping, capacitance switch 2 and key switch 4 two-stage buttons are released simultaneously, so the user only feels the stroke of one-level button, and capacitance switch 2 can the conducting because of extruding, must have finger to press just and respond.Therefore can very stably realize the closure of two groups of switches.No matter the pine that screw is twisted or tight, whether switch is often closed, under the prerequisite without any operation, capacitance switch 2 and key switch 4 are opened all the time, be particularly suitable for being useful in medical instruments field, can well safeguard the stability of medicine equipment, and can have the longer life-span than traditional double contact button structure.
Although the utility model discloses as above with preferred embodiment; so it is not to limit the utility model; any those skilled in the art; within not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection range of the present utility model is worked as with being as the criterion that claims were defined.
Claims (10)
1. double-contact press-key structure, be disposed with button cap (1), flexible printed circuit board (3) and rigid printed circuit board (5), the upper surface of described rigid printed circuit board (1) is pasted with key switch (4), it is characterized in that, the upper surface of described flexible printed circuit board (3) is provided with capacitance switch (2).
2. double-contact press-key structure as claimed in claim 1 is characterized in that, the material of described button cap (1) is plastics, rubber or silica gel.
3. double-contact press-key structure as claimed in claim 1 is characterized in that, the central shaft of the central shaft of described key switch (4) in the vertical direction and button cap (1) in the vertical direction overlaps.
4. double-contact press-key structure as claimed in claim 1 is characterized in that, the central shaft of the central shaft of described capacitance switch (2) in the vertical direction and button cap (1) in the vertical direction overlaps.
5. double-contact press-key structure as claimed in claim 1 is characterized in that, shape, the in the same size of described flexible printed circuit board (3) and rigid printed circuit board (5).
6. double-contact press-key structure as claimed in claim 5, it is characterized in that, described flexible printed circuit board (3) be shaped as rectangle, square, circle or oval, described rigid printed circuit board (5) be shaped as rectangle, square, circle or oval.
7. double-contact press-key structure as claimed in claim 5 is characterized in that, described flexible printed circuit board (3) is connected 5 with rigid printed circuit board) connect by buckle.
8. such as each described double-contact press-key structure of claim 1-7, it is characterized in that, described button cap (1) directly is mounted on described flexible printed circuit board (3) towards a side of described capacitance switch (2).
9. such as each described double-contact press-key structure of claim 1-7, it is characterized in that, the edge of described button cap (1) stretches out, and is formed for holding the shell (11) of described flexible printed circuit board (3) and described rigid printed circuit board (5).
10. double-contact press-key structure as claimed in claim 9 is characterized in that, described shell (11) and described rigid printed circuit board (5) are complementary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320166017 CN203205301U (en) | 2013-04-03 | 2013-04-03 | Double-pole single throw structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320166017 CN203205301U (en) | 2013-04-03 | 2013-04-03 | Double-pole single throw structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203205301U true CN203205301U (en) | 2013-09-18 |
Family
ID=49149384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320166017 Expired - Fee Related CN203205301U (en) | 2013-04-03 | 2013-04-03 | Double-pole single throw structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203205301U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378241A (en) * | 2018-12-24 | 2019-02-22 | 东莞市热动电子科技有限公司 | A kind of mechanical keyboard switch of double-contact |
| CN113542477A (en) * | 2021-07-14 | 2021-10-22 | 维沃移动通信有限公司 | Key module, equipment control method and device and electronic equipment |
-
2013
- 2013-04-03 CN CN 201320166017 patent/CN203205301U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378241A (en) * | 2018-12-24 | 2019-02-22 | 东莞市热动电子科技有限公司 | A kind of mechanical keyboard switch of double-contact |
| CN113542477A (en) * | 2021-07-14 | 2021-10-22 | 维沃移动通信有限公司 | Key module, equipment control method and device and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20140403 |