CN103198972A - Micro negative pressure driving switch device - Google Patents
Micro negative pressure driving switch device Download PDFInfo
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- CN103198972A CN103198972A CN2012100023593A CN201210002359A CN103198972A CN 103198972 A CN103198972 A CN 103198972A CN 2012100023593 A CN2012100023593 A CN 2012100023593A CN 201210002359 A CN201210002359 A CN 201210002359A CN 103198972 A CN103198972 A CN 103198972A
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- negative pressure
- pressure cavity
- sensing chip
- air
- switch device
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Abstract
The invention discloses a micro negative pressure driving switch device, in particular to a switch device which is capable of achieving automatically switching on and off according to small changes of negative pressure of gas. The micro negative pressure driving switch device is composed of a switch body 1, a negative pressure cavity 2, a negative pressure cavity protective cover 7, a centre fixing electrode 3, a peripheral conductor 4, a coil spring 5 and an air pressure inducting slice 6, where the centre fixing electrode 3, the peripheral conductor 4, the coil spring 5 and the air pressure inducting slice 6 are installed in the interior of the negative pressure cavity 2, and the air pressure inducting slice 6 is capable of inducting changes of air negative pressure and pushing the coil spring 5 and the center fixing electrode 3 to switch on or switch off. According to the micro negative pressure driving switch device, the switch body 1, the negative pressure cavity 2, an air conducting connector and an electrode are designed and manufactured in integration, circuits are easy to assemble. The air pressure inducting slice is firmly fixed on an opening of the negative pressure cavity by the negative pressure protective cover, sealing property is good, and a spiral structure shifting electrode modular design is not easy to deform, easy to manufacture and capable of reacting sensitively to changes of air pressure. Reliability of circuit on-off is high. The micro negative pressure driving switch device has application values of practical industries.
Description
Technical field
The present invention relates to a kind of little negative pressure driving switch device, particularly a kind of switching device that switches on and off automatically according to the minor variations realization of gas negative pressure.
Background technology
Switching device has various product line and model as a kind of common electronic component, is widely used in various electronic products and equipment.Negative pressure switch utilizes air pressure as control signal as a kind of special switch element, when system's internal pressure high pressure or when being lower than setting pressure, makes contacting or the disconnection of switch.The negative pressure switch of Xiao Shouing generally adopts B/P EGR Back Pressure Transducer EGR as induction installation in the market, complex structure, and volume is big, is not suitable for small especially pressure variation or small especially space and uses.A kind of little negative pressure alarming device is arranged, relate to the switch that a kind of little negative pressure triggers, this on-off principle is feasible, but the air pressure test chamber is excessive, and detecting reliability is low; And its manufacturing process is immature, only rests on the principle stage.Therefore development of practical little negative pressure switch reliable, easy to manufacture, easy to assembly is the demand place in market.
Summary of the invention
The object of the present invention is to provide a kind of deficiency that prior art exists that overcomes, little negative pressure driving switch device practical reliable, easy to manufacture, easy to assembly, in order to achieve the above object, technical scheme of the present invention is achieved in that a kind of little negative pressure driving switch device, and it is characterized in that: it is made up of switch body 1, negative pressure cavity 2, center fixation electrode 3, peripheral conductors 4, disc spring 5, air pressure sensing chip 6, sensing chip over cap 7; Negative pressure cavity 2 is positioned at switch body 1 surface, and air guide joint 8 is arranged on the switch body 1, and air guide joint 8 centers have air guide channel 10 to communicate with the gas port 1-3 of pedestal 1-1 inside, and gas port 1-3 is opened on negative pressure cavity 2 inside; Center fixation electrode 3 is positioned at the bottom centre of negative pressure cavity 2, protrudes negative pressure cavity 2 bottom surfaces, and its electrode connecting line 9 is drawn by switch body 1 inside; Peripheral conductors 4 is near negative pressure cavity 2 inwalls, and its electrode connecting line 9 is drawn by switch body 1 inside; Disc spring 5 is made up of edge 5-1, helical structure 5-2 and center traveling electrode 5-3, and disc spring 5 is installed to negative pressure cavity 2 inside, and its edge 5-1 reliably connects together with peripheral conductors 4, and upper surface is suitable for reading concordant with negative pressure cavity 2; Helical structure 5-2 self has elasticity, and under the active force perpendicular to the bottom surface, center traveling electrode 5-3 can be offset, and is similar to the ejection of disc spring; After pressure disappears, the helical structure return, center traveling electrode 5-3 gets back to bottom center; Sensing chip over cap 7 is suitable for reading with air pressure sensing chip 6 sealing and fixing negative pressure cavities 2, is close to the upper surface of disc spring 5.
Described little negative pressure driving switch device has stopper slot 2-2 on negative pressure cavity 2 outer walls, can mate with the positive stop strip of sensing chip over cap 7 inside that are in place, to fixedly secure air pressure sensing chip 6; Annular nest 2-1 is arranged on negative pressure cavity 2 upper port planes, and the O type ring 6-1 of air pressure sensing chip 6 just in time can be placed on wherein, so that sensing chip over cap 7 fixes it.
Described little negative pressure driving switch device, its air pressure sensing chip 6 is made up of O type ring 6-1 and seal membrane 6-2 two parts of periphery, and O type ring 6-1 cross section is circular, and its diameter is bigger than seal membrane 6-2 thickness, O type ring 6-1 has elasticity, seal membrane 6-2 tiling can be launched.
Described little negative pressure driving switch device has pore 7-1 on its sensing chip over cap 7 bottom surfaces, and the spreading mouth 7-2 of open communication end is arranged on the sidewall, and positive stop strip 7-3 is arranged on the inwall.
Described little negative pressure driving switch device has the wireway retaining thread on the air guide joint 8 of its switch body 1, is used for reliably being connected with outside air duct fitting.
The invention has the beneficial effects as follows: switch body and negative pressure cavity, air guide joint, electrode integrated design are made, and the circuit assembling is simple; The sensing chip over cap is firmly suitable for reading at negative pressure cavity with the air pressure sensing chip, good airproof performance, and the modularized design of helical structure traveling electrode, not yielding, flexible swinging is quick on the draw to negative pressure, connecting and disconnecting of the circuit reliability height; The switching device assembling is simple, easy to manufacture, has practical application in industry and is worth.
Description of drawings
Fig. 1 is overall structure figure of the present invention, also can be used as Figure of abstract.
Fig. 2 is vertical view of the present invention.
Fig. 3 removes schematic diagram behind the sensing chip over cap for the present invention, and the air pressure sensing chip is installed in the annular nest of negative pressure cavity upper port plane among the figure.
Fig. 4 removes schematic diagram behind the gentle pressure sensing chip of pressure-sensitive sheet over cap for the present invention, and the disc spring upper surface is suitable for reading concordant with negative pressure cavity among the figure.
Fig. 5 removes schematic diagram behind pressure-sensitive sheet over cap, air pressure sensing chip and the disc spring for the present invention.
Fig. 6 is switch body of the present invention, negative pressure cavity, air guide interface structure schematic diagram.
Fig. 7 is the front view of Fig. 6, and dotted line has been illustrated position and the annexation of peripheral conductors, center fixation electrode, contact conductor and airtube among the figure.
Fig. 8 is the structure chart of disc spring of the present invention.
Fig. 9 is air pressure sensing chip structural representation of the present invention.
Figure 10 is air pressure sensing chip A-A ' cutaway view of the present invention.
Figure 11 is the structure chart of pressure-sensitive sheet over cap of the present invention.
Wherein:
1, switch body
1-1, pedestal
1-2, fixed-wing
1-3, gas port
2, negative pressure cavity
2-1, annular nest
2-2, stopper slot
3, center fixation electrode
4, peripheral conductors
5, disc spring
5-1, edge
5-2, helical structure
5-3, center traveling electrode
6, air pressure sensing chip
6-1, annular bar
6-2, seal membrane
7, sensing chip over cap
7-1, pore
7-2, spreading mouth
7-3, positive stop strip
8, air guide joint
9, contact conductor
10, air guide channel
Embodiment
As Fig. 1-Figure 11, switch body 1 is the main body of switch, and its shape can be square or circular, negative pressure cavity 2 on one face, negative pressure cavity 2 and switch body 1 integrated manufacturing; Air guide joint 8 on another face of switch body, air guide joint 8 also with switch body 1 integrated manufacturing; Air guide joint 8 centers have air guide channel 10 to be communicated with the gas port 1-3 of pedestal 1-1, and gas port 1-3 is opened on negative pressure cavity 2 inside; Negative pressure cavity 2 bottom centre arrange center fixation electrode 3, detect the survey cavity wall peripheral conductors 4 is set all around, and center fixation electrode 3 and peripheral conductors 4 adopt pre-buried mode and the integrated manufacturings of switch body, and center fixation electrode 3 exceeds negative pressure cavity 2 bottom surfaces; Contact conductor 9 is drawn out to by switch body 1 inside on the another one face of switch body, is used for being connected to circuit.
The O type ring 6-1 of air pressure sensing chip 6 is placed in well in the annular nest 2-1 of negative pressure cavity 2 upper port planes, and seal membrane 6-2 lower surface is adjacent to the upper surface of disc spring 5.Sensing chip over cap 7 compresses air pressure sensing chip 6, and its positive stop strip 7-3 enters the stopper slot 2-2 of negative pressure cavity 2 outer walls, and 6-1 is flexible for O type ring, and the deformation under the pressure is with negative pressure cavity 2 suitable for reading sealings.
Claims (5)
1. little negative pressure driving switch device, it is characterized in that: it is made up of switch body (1), negative pressure cavity (2), center fixation electrode (3), peripheral conductors (4), disc spring (5), air pressure sensing chip (6), sensing chip over cap (7); Negative pressure cavity (2) is positioned at switch body (1) surface, and air guide joint (8) is arranged on the switch body (1), and air guide joint (8) center has the inner gas port (1-3) of air guide channel (10) and pedestal (1-1) to communicate, and gas port (1-3) is opened on negative pressure cavity (2) inside; Center fixation electrode (3) is positioned at the bottom centre of negative pressure cavity (2), protrudes negative pressure cavity (2) bottom surface, and its electrode connecting line (9) is drawn by switch body (1) inside; Peripheral conductors (4) is near negative pressure cavity (2) inwall, and its electrode connecting line (9) is drawn by switch body (1) inside; Disc spring (5) is made up of edge (5-1), helical structure (5-2) and center traveling electrode (5-3), and disc spring (5) is installed to negative pressure cavity (2) inside, and its edge (5-1) reliably connects together with peripheral conductors (4), and upper surface is suitable for reading concordant with negative pressure cavity (2); Helical structure (5-2) self has elasticity, and under the active force perpendicular to the bottom surface, center traveling electrode (5-3) can be offset, and is similar to the ejection of disc spring; After pressure disappears, the helical structure return, center traveling electrode (5-3) is got back to bottom center; Sensing chip over cap (7) is suitable for reading with air pressure sensing chip (6) sealing and fixing negative pressure cavity (2), is close to the upper surface of disc spring (5).
2. little negative pressure driving switch device according to claim 1 is characterized in that: on negative pressure cavity (2) outer wall stopper slot (2-2) is arranged, can mate with the inner positive stop strip of the sensing chip over cap (7) that is in place, to fixedly secure air pressure sensing chip (6); On negative pressure cavity (2) upper port plane annular nest (2-1) is arranged, the O type ring (6-1) of air pressure sensing chip (6) just in time can be placed on wherein, so that sensing chip over cap (7) fixes it.
3. little negative pressure driving switch device according to claim 1, it is characterized in that: air pressure sensing chip (6) is made up of O type ring (6-1) and seal membrane (6-2) two parts of periphery, O type ring (6-1) cross section is circular, its diameter is bigger than seal membrane (6-2) thickness, O type ring (6-1) has elasticity, seal membrane (6-2) tiling can be launched.
4. little negative pressure driving switch device according to claim 1, it is characterized in that: sensing chip over cap (7) has pore (7-1) on the bottom surface, and the spreading (7-2) of open communication end is arranged on the sidewall, and positive stop strip (7-3) is arranged on the inwall.
5. little negative pressure driving switch device according to claim 1 is characterized in that: have the wireway retaining thread on the air guide joint (8) of switch body (1), be used for reliably being connected with outside air duct fitting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100023593A CN103198972A (en) | 2012-01-06 | 2012-01-06 | Micro negative pressure driving switch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100023593A CN103198972A (en) | 2012-01-06 | 2012-01-06 | Micro negative pressure driving switch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103198972A true CN103198972A (en) | 2013-07-10 |
Family
ID=48721435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100023593A Pending CN103198972A (en) | 2012-01-06 | 2012-01-06 | Micro negative pressure driving switch device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103198972A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH031416A (en) * | 1989-05-29 | 1991-01-08 | Saginomiya Seisakusho Inc | Compact size pressure switch |
| US5818002A (en) * | 1996-03-01 | 1998-10-06 | Cts Corporation | Pressure change warning switch |
| CN201134393Y (en) * | 2007-12-03 | 2008-10-15 | 四川航天计量测试研究所 | Pressure switch |
| CN202384254U (en) * | 2012-01-06 | 2012-08-15 | 郑州昊能科技有限公司 | Micro negative pressure drive switch device |
-
2012
- 2012-01-06 CN CN2012100023593A patent/CN103198972A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH031416A (en) * | 1989-05-29 | 1991-01-08 | Saginomiya Seisakusho Inc | Compact size pressure switch |
| US5818002A (en) * | 1996-03-01 | 1998-10-06 | Cts Corporation | Pressure change warning switch |
| CN201134393Y (en) * | 2007-12-03 | 2008-10-15 | 四川航天计量测试研究所 | Pressure switch |
| CN202384254U (en) * | 2012-01-06 | 2012-08-15 | 郑州昊能科技有限公司 | Micro negative pressure drive switch device |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130710 |