CN201522962U - Normally open airflow sensitive switch - Google Patents
Normally open airflow sensitive switch Download PDFInfo
- Publication number
- CN201522962U CN201522962U CN2009202392026U CN200920239202U CN201522962U CN 201522962 U CN201522962 U CN 201522962U CN 2009202392026 U CN2009202392026 U CN 2009202392026U CN 200920239202 U CN200920239202 U CN 200920239202U CN 201522962 U CN201522962 U CN 201522962U
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- CN
- China
- Prior art keywords
- circuit board
- sensitive switch
- vibrating diaphragm
- air
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a normally open airflow sensitive switch which comprises a casing. A metal polar plate is arranged at the bottom of the inner cavity of the casing; polar plate air holes are formed on the polar plate; an insulation backing ring is arranged above the polar plate; a diaphragm is tightened and bonded on the upper end surface of the insulation backing ring; the surface of the diaphragm is plated with nickel; a metal ring is arranged above the diaphragm; a circuit board is arranged above the metal ring; circuit board air holes are formed on the circuit board; the upper part of the casing compresses the components together through the mode of turning edge inwards; a wiring terminal is arranged on the outer side of the circuit board; an airflow hole corresponding to the position of the diaphragm is formed at the bottom of the casing; an insulation ring is sleeved outside the metal ring; and an anti-dust screen is bonded on the outer side of the bottom of the casing. The normally open airflow sensitive switch adopting the structure has reasonable structure, small volume and higher sensitivity, is suitable to be used in the places for detecting small airflow change, and particularly to be used in places with small space for detecting airflow.
Description
Technical field
The utility model relates to a kind of air-flow sensitive switch of often opening.
Background technology
The air-flow sensitive switch, as the term suggests be exactly the perception variations in flow, and variations in flow is converted into the transducer of corresponding with it switching signal output.Traditional air-flow sensitive switch is to drive magnetic switch by silicone rubber membrane to constitute at present, when air flow stream is crossed silicone rubber membrane, silicone rubber membrane shakes, thereby trigger the magnetic switch action, represent the switching value signal of air-flow conversion by magnetic switch output, it is simple in structure that tradition is often driven the air-flow sensitive switch, easy to use, uses very extensive.The weak point that tradition is often driven the air-flow sensitive switch is: volume is big, and sensitivity is low, is unsuitable for the applications of having relatively high expectations in induction sensitivity.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of rational in infrastructure at above-mentioned deficiency, and volume is small and exquisite, and the higher a kind of air-flow sensitive switch of often opening of sensitivity.
For solving the problems of the technologies described above, Ben Changkai air-flow sensitive switch comprises shell, its design feature is: the shell inner cavity bottom is provided with metal polar plate, pole plate is provided with the pole plate pore, the pole plate top is provided with the insulation gasket ring, the upper surface tension of insulation gasket ring is pasted with vibrating diaphragm, the vibrating diaphragm plating nickel on surface, the vibrating diaphragm top is provided with becket, the becket top is provided with circuit board, and circuit board is provided with the circuit board pore, and shell upper is pressed together above-mentioned each parts by the form to in-flanges, the circuit board outside is provided with binding post, and outer casing bottom is provided with the airflow hole corresponding with the vibrating diaphragm position.
The air-flow sensitive switch of often opening of this structure realizes that by the diaphragm-vibrating type contact structure volume is small and exquisite and sensitivity is higher.
The diaphragm-vibrating type contact structure mainly comprises vibrating diaphragm and the metal polar plate that is arranged in the shell, be provided with the insulation gasket ring between vibrating diaphragm and the pole plate, stick on the gasket ring side after the avris tension of vibrating diaphragm, like this, vibrating diaphragm just is plane under the support of gasket ring, vibrating diaphragm and metal polar plate parallel interval under the support of insulation gasket ring comes.In order to make vibrating diaphragm and metal polar plate constitute electrical structure with contact function, nickel plating on the vibrating diaphragm, the nickel coating of vibrating diaphragm is electrically connected with circuit board by becket, pole plate also is electrically connected with the circuit board formation by shell, like this, vibrating diaphragm and pole plate just all are electrically connected with circuit board, and vibrating diaphragm and pole plate have constituted two contacts of normal open switch.Air-flow triggers vibrating diaphragm for convenience, metal polar plate is provided with the pole plate pore that connects the pole plate both sides, also be provided with the circuit board pore that connects the circuit board both sides on the circuit board, like this, vibrating diaphragm links to each other with ambient atmosphere by the circuit board pore away from a side of pole plate, the side that vibrating diaphragm is adjacent with pole plate also communicates with atmosphere by pole plate pore and airflow hole, when outer gas stream passes through the circuit board pore when the airflow hole direction flows, air-flow will promote vibrating diaphragm and move to the direction of pole plate, nickel coating and metal polar plate when the vibrating diaphragm surface touch a time-out, vibrating diaphragm has just constituted with pole plate and has been electrically connected, circuit board sends this switching signal to external circuit by binding post, thereby realizes the effect of sensitive perception air-flow.
As improvement, the becket outside is set with dead ring.
In order to prevent that becket from contacting and short circuit with outer casing inner wall, the becket outside is set with dead ring, and dead ring can be isolated becket and shell, thereby improves the stability of Ben Changkai air-flow sensitive switch.
As further improvement, the outer casing bottom outside is pasted with Air Filter.
In order to prevent that the impurity in the air-flow from entering Ben Changkai air-flow sensitive switch inside by airflow hole, be pasted with Air Filter in the shell bottom outside, after being set, Air Filter can filter out impurities, guarantee the sensitivity and the life-span of Ben Changkai air-flow sensitive switch.
In sum, that adopts this structure often drives the air-flow sensitive switch, and rational in infrastructure, volume is small and exquisite, and sensitivity is higher, is adapted at detecting in the occasion of small variations in flow using, and is particluarly suitable for the less air-flow in space and detects occasion and use.
Description of drawings
In conjunction with the accompanying drawings the utility model is described in further details:
Fig. 1 is a structural representation of the present utility model.
Among Fig. 1: 1 is shell, and 2 is pole plate, and 3 is gasket ring, and 4 is vibrating diaphragm, and 5 is becket, and 6 is circuit board, and 7 is binding post, and 8 is airflow hole, and 9 is dead ring, and 10 is Air Filter, and 11 is the pole plate pore, and 12 is the circuit board pore.
Embodiment
As shown in Figure 1, for this often opens the structural representation of air-flow sensitive switch, this is often driven the air-flow sensitive switch and comprises shell 1, shell 1 intracavity bottom is provided with metal polar plate 2, pole plate 2 is provided with pole plate pore 11, pole plate pore 11 connects pole plate 2 both sides, pole plate 2 tops are provided with insulation gasket ring 3, the upper surface tension of insulation gasket ring 3 is covered with vibrating diaphragm 4, the side nickel plating that vibrating diaphragm 4 and pole plate 2 are adjacent, vibrating diaphragm 4 is away from the also nickel plating of limit, side portion of pole plate 2, two nickel coatings up and down of vibrating diaphragm 4 are electrically connected, vibrating diaphragm 4 tops are provided with becket 5, becket 5 is pressed on the nickel coating of vibrating diaphragm 4 away from pole plate 2, becket 5 tops are provided with circuit board 6, circuit board 6 is provided with circuit board pore 12, circuit board pore 12 connects the circuit board two sides, shell 1 top is pressed together above-mentioned each parts by the form to in-flanges, like this, the nickel coating of vibrating diaphragm 4 is electrically connected with circuit board 6 downsides by becket 5, and pole plate 2 is electrically connected with the circuit board upper side by shell 1, and circuit board 6 outsides are installed with binding post 7, and shell 1 bottom is provided with the airflow hole 8 corresponding with vibrating diaphragm 4 positions.In order to prevent that becket 5 from contacting and short circuit with shell 1, becket 5 outsides are set with dead ring 9, and dead ring 9 also is sleeved on vibrating diaphragm 4 outsides, can avoid side contacts in the nickel coating on vibrating diaphragm 4 surfaces and the shell 1 and short circuit.Shell 1 bottom outside is pasted with Air Filter 10, can prevent that dust from entering this from airflow hole 8 and often opening in the air-flow sensitive switch, has prolonged useful life.
Claims (3)
1. often drive the air-flow sensitive switch for one kind, comprise shell (1), it is characterized in that: shell (1) intracavity bottom is provided with metal polar plate (2), pole plate (2) is provided with pole plate pore (11), pole plate (2) top is provided with insulation gasket ring (3), the upper surface tension of insulation gasket ring (3) is pasted with vibrating diaphragm (4), vibrating diaphragm (4) plating nickel on surface, vibrating diaphragm (4) top is provided with becket (5), becket (5) top is provided with circuit board (6), circuit board (6) is provided with circuit board pore (12), shell (1) top is pressed together above-mentioned each parts by the form to in-flanges, circuit board (6) outside is provided with binding post (7), and shell (1) bottom is provided with the airflow hole (8) corresponding with vibrating diaphragm (4) position.
2. the air-flow sensitive switch of often opening as claimed in claim 1 is characterized in that: becket (5) outside is set with dead ring (9).
3. the air-flow sensitive switch of often opening as claimed in claim 1 or 2 is characterized in that: shell (1) bottom outside is pasted with Air Filter (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202392026U CN201522962U (en) | 2009-09-28 | 2009-09-28 | Normally open airflow sensitive switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202392026U CN201522962U (en) | 2009-09-28 | 2009-09-28 | Normally open airflow sensitive switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201522962U true CN201522962U (en) | 2010-07-07 |
Family
ID=42509138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202392026U Expired - Fee Related CN201522962U (en) | 2009-09-28 | 2009-09-28 | Normally open airflow sensitive switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201522962U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037015A (en) * | 2013-03-08 | 2014-09-10 | 上海骏颉自动化设备有限公司 | Pneumatic switch |
| CN109951958A (en) * | 2019-04-24 | 2019-06-28 | 深圳市众合智联科技有限公司 | Ultrathin surface-mount formula gas flow transducer |
-
2009
- 2009-09-28 CN CN2009202392026U patent/CN201522962U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037015A (en) * | 2013-03-08 | 2014-09-10 | 上海骏颉自动化设备有限公司 | Pneumatic switch |
| CN109951958A (en) * | 2019-04-24 | 2019-06-28 | 深圳市众合智联科技有限公司 | Ultrathin surface-mount formula gas flow transducer |
| CN109951958B (en) * | 2019-04-24 | 2024-03-22 | 深圳市众合智联科技有限公司 | Ultrathin surface-mounted airflow sensor |
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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: 20100707 Termination date: 20120928 |