CN204480931U - A kind of Piezoelectric switches - Google Patents
A kind of Piezoelectric switches Download PDFInfo
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- CN204480931U CN204480931U CN201520175936.8U CN201520175936U CN204480931U CN 204480931 U CN204480931 U CN 204480931U CN 201520175936 U CN201520175936 U CN 201520175936U CN 204480931 U CN204480931 U CN 204480931U
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Abstract
The utility model belongs to switching technique field, refers in particular to a kind of Piezoelectric switches.Comprise waterproof case, skeleton, substrate and piezoelectric ceramic piece; Described waterproof case is the cylindrical shell of upper end closed, described skeleton is provided with in waterproof case inner chamber, be close to the inwall of waterproof case upper surface on the upside of skeleton, piezoelectric ceramic piece is furnished with in skeleton, the downside of piezoelectric ceramic piece is provided with locating support, the downside of locating support is provided with substrate, and substrate is installed on skeleton bottom; The upper surface of described waterproof case and skeleton all can strain indent under external force; Described substrate forms inserted sheet and Piezoelectric switches control circuit, piezoelectric ceramic piece provides cut-in voltage for Piezoelectric switches control circuit.Of the present utility model highly sensitive, practicality is good, adopts the design of waterproof case, achieves the totally-enclosed of inner body, not only waterproof, can also be dust-proof, effectively improves the useful life of components and parts; Piezoelectric switches control circuit can control regardless of both positive and negative polarity, easy to use, safe and reliable.
Description
Technical field
The utility model belongs to switching technique field, refers in particular to a kind of Piezoelectric switches.
Background technology
No. CN2708476th, People's Republic of China's patent announcement discloses a kind of push switch, which disclose the insulating body forming fixed contact and the discoid moving contact being installed in insulating body, fixed contact is provided with the central fixed contact manifesting insulating body accepting hole, operationally, operator makes it to be formed with central fixed contact to contact conducting by pressing moving contact, thus realizes switch motion.
But, due to miniaturization structure and the manually-operated characteristic of this type of push switch, when external environment condition or switch self have dust or foreign material to enter contact area, then bringing cannot the hidden danger of conducting, in life, operator runs into this type of loose contact, often solving in the mode of enlarge active surface by increasing pressing force, hardly realizing that such action switch life and the impact of performance are fatal concerning flexible moving contact.
Given this, be necessary to provide a kind of push switch of new construction to overcome above-mentioned defect.
Summary of the invention
It is simple that the purpose of this utility model is to provide a kind of structure, safe and reliable, can accurate Piezoelectric switches.
The purpose of this utility model is achieved in that
A kind of Piezoelectric switches, comprises waterproof case, skeleton, substrate and piezoelectric ceramic piece; Described waterproof case is the cylindrical shell of upper end closed, described skeleton is provided with in waterproof case inner chamber, be close to the inwall of waterproof case upper surface on the upside of skeleton, piezoelectric ceramic piece is furnished with in skeleton, the downside of piezoelectric ceramic piece is provided with locating support, the downside of locating support is provided with substrate, and substrate is installed on skeleton bottom;
The upper surface of described waterproof case and skeleton all can strain indent under external force;
Described substrate forms inserted sheet and Piezoelectric switches control circuit, piezoelectric ceramic piece provides cut-in voltage for Piezoelectric switches control circuit.
The concrete structure that described substrate is installed on skeleton bottom is: described skeleton comprises a top board, and all side direction compacted unders of top board have two or more side plate, and the lower end of side plate forms grab, and the both sides of substrate held tightly by grab.
Described locating support is elongated, and the upside of locating support is provided with the location notch coincide with piezoelectric ceramic piece lower surface, and the upper surface of locating support is against on the downside of piezoelectric ceramic piece, and the lower surface of locating support is against on substrate.
Convert as one, the concrete structure that described substrate is installed on skeleton bottom is: described skeleton comprises a top board, all side direction compacted unders of top board have two or more side plate, and the lower end of side plate forms caulking groove, and all sides of described substrate form the block snapping in described caulking groove.
Described locating support is ring, and piezoelectric ceramic piece comprises metal vibration plate and piezoelectric ceramic piece main body, and piezoelectric ceramic piece main body can embed in ring; Ring upper surface is against on the downside of metal vibration plate, and the lower surface of ring is against on substrate.
The utility model gives prominence to compared to existing technology and useful technique effect is:
Of the present utility model highly sensitive, practicality is good, adopts the design of waterproof case, achieves the totally-enclosed of inner body, not only waterproof, can also be dust-proof, effectively improves the useful life of components and parts; Piezoelectric switches control circuit can control regardless of both positive and negative polarity, easy to use, safe and reliable.
Accompanying drawing explanation
Fig. 1 is the exploded view of embodiment one of the present utility model.
Fig. 2 is the structural representation of embodiment one of the present utility model.
Fig. 3 is the structural representation of embodiment two of the present utility model.
Fig. 4 is the exploded view (waterproof case is not shown) of embodiment two of the present utility model.
Fig. 5 is the schematic diagram of Piezoelectric switches control circuit of the present utility model.
1-press section; 2-sealing ring; 3-hold-down nut; 4-waterproof case; 5-caulking groove; 6-side plate; 7-piezoelectric ceramic piece; 8-ring; 9-substrate; 10-block; 11-inserted sheet; 12-inserted sheet; 13-skeleton; 14-grab; 15-locating support; 16-metal vibration plate; 17-piezoelectric ceramic piece main body; 18-location notch.
Embodiment
The utility model is further described with specific embodiment below in conjunction with accompanying drawing:
Embodiment 1: a kind of Piezoelectric switches, comprises waterproof case 4, skeleton 13, substrate 9 and piezoelectric ceramic piece 7; Described waterproof case 4 is the cylindrical shell of upper end closed, described skeleton 13 is provided with in waterproof case inner chamber, be close to the inwall of waterproof case upper surface on the upside of skeleton 13, piezoelectric ceramic piece 7 is furnished with in skeleton 13, the downside of piezoelectric ceramic piece 7 is provided with locating support, the downside of locating support is provided with substrate 9, and substrate 9 is installed on skeleton bottom;
The upper surface of described waterproof case 4 and skeleton 13 all can strain indent under external force;
Described substrate 9 forms inserted sheet 11,12 and Piezoelectric switches control circuit, piezoelectric ceramic piece provides cut-in voltage for Piezoelectric switches control circuit.
The concrete structure that described substrate is installed on skeleton bottom is: described skeleton comprises a top board, all side direction compacted unders of top board have two or more side plate 6, the lower end of side plate 6 forms caulking groove 5, and all sides of described substrate form the block 10 snapping in described caulking groove.
Described locating support is ring 8, and piezoelectric ceramic piece comprises metal vibration plate 16 and piezoelectric ceramic piece main body 17, and piezoelectric ceramic piece main body 17 can embed in ring 8; Ring 8 upper surface is against on the downside of metal vibration plate 16, and the lower surface of ring 8 is against on substrate 9.
Embodiment 2: the present embodiment is substantially the same manner as Example 1, its difference is, the concrete structure that described substrate 9 is installed on skeleton 13 bottom is: described skeleton comprises a top board, all side direction compacted unders of top board have two or more side plate 6, the lower end of side plate 6 forms grab 14, and the both sides of substrate 9 held tightly by grab 14.
Described locating support 15 is elongated, and the upside of locating support is provided with the location notch 18 coincide with piezoelectric ceramic piece lower surface, and the upper surface of locating support is against on the downside of piezoelectric ceramic piece, and the lower surface of locating support is against on substrate.
As shown in Figure 5; described Piezoelectric switches control circuit is: piezoelectric ceramic circuit P1, resistance R1 and resistance R2 are linked in sequence formation one driving power loop; when there being pressed by external force switch surface; piezoelectric ceramic piece P1 flexural deformation will be driven to produce electromotive force; make VA produce the transient voltage being greater than 3V, form VB by the dividing potential drop of R2 and R1, resistance R2 is parallel with diode D1; D1 is reverse protection diode, and the reverse voltage preventing piezoelectric ceramic piece from producing when bending bounce-back damages field effect transistor.VB uses to obtain metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 admittance (the wire extraction voltage between resistance R1 and resistance R2 is held to the G of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2).When input external voltage is M positive pole, during N negative pole, Q1 ON operation, forward current passes through from the diode-built-in of Q2, makes circuit form loop.Be M negative pole when input voltage is external voltage, during N positive pole, Q2 ON operation, reverse current passes through from Q1 diode-built-in, and (the D end of metal-oxide-semiconductor Q1 is connected with a wherein inserted sheet, the S end ground connection of metal-oxide-semiconductor Q1 to make circuit form loop, metal-oxide-semiconductor Q1 is parallel with diode D2, the D end of metal-oxide-semiconductor Q2 is connected with another inserted sheet, and the S of metal-oxide-semiconductor Q2 holds ground connection, and metal-oxide-semiconductor Q2 is parallel with diode D3).Metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 is N channel depletion type metal-oxide-semiconductor.
Above-described embodiment is only preferred embodiment of the present utility model, not limits protection range of the present utility model according to this, therefore: all equivalence changes done according to structure of the present utility model, shape, principle, all should be covered by within protection range of the present utility model.
Claims (5)
1. a Piezoelectric switches, is characterized in that, comprises waterproof case, skeleton, substrate and piezoelectric ceramic piece; Described waterproof case is the cylindrical shell of upper end closed, described skeleton is provided with in waterproof case inner chamber, be close to the inwall of waterproof case upper surface on the upside of skeleton, piezoelectric ceramic piece is furnished with in skeleton, the downside of piezoelectric ceramic piece is provided with locating support, the downside of locating support is provided with substrate, and substrate is installed on skeleton bottom;
The upper surface of described waterproof case and skeleton all can strain indent under external force;
Described substrate forms inserted sheet and Piezoelectric switches control circuit, piezoelectric ceramic piece provides cut-in voltage for Piezoelectric switches control circuit.
2. a kind of Piezoelectric switches according to claim 1, it is characterized in that, the concrete structure that described substrate is installed on skeleton bottom is: described skeleton comprises a top board, all side direction compacted unders of top board have two or more side plate, the lower end of side plate forms caulking groove, and all sides of described substrate form the block snapping in described caulking groove.
3. a kind of Piezoelectric switches according to claim 2, is characterized in that, described locating support is ring, and piezoelectric ceramic piece comprises metal vibration plate and piezoelectric ceramic piece main body, and piezoelectric ceramic piece main body can embed in ring; Ring upper surface is against on the downside of metal vibration plate, and the lower surface of ring is against on substrate.
4. a kind of Piezoelectric switches according to claim 1, it is characterized in that, the concrete structure that described substrate is installed on skeleton bottom is: described skeleton comprises a top board, all side direction compacted unders of top board have two or more side plate, the lower end of side plate forms grab, and the both sides of substrate held tightly by grab.
5. a kind of Piezoelectric switches according to claim 4, it is characterized in that, described locating support is elongated, the upside of locating support is provided with the location notch coincide with piezoelectric ceramic piece lower surface, the upper surface of locating support is against on the downside of piezoelectric ceramic piece, and the lower surface of locating support is against on substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520175936.8U CN204480931U (en) | 2015-03-26 | 2015-03-26 | A kind of Piezoelectric switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520175936.8U CN204480931U (en) | 2015-03-26 | 2015-03-26 | A kind of Piezoelectric switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204480931U true CN204480931U (en) | 2015-07-15 |
Family
ID=53636708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520175936.8U Expired - Fee Related CN204480931U (en) | 2015-03-26 | 2015-03-26 | A kind of Piezoelectric switches |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204480931U (en) |
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2015
- 2015-03-26 CN CN201520175936.8U patent/CN204480931U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20170326 |
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| CF01 | Termination of patent right due to non-payment of annual fee |