CN1162972C - Proximity Hall switch - Google Patents
Proximity Hall switch Download PDFInfo
- Publication number
- CN1162972C CN1162972C CNB021123268A CN02112326A CN1162972C CN 1162972 C CN1162972 C CN 1162972C CN B021123268 A CNB021123268 A CN B021123268A CN 02112326 A CN02112326 A CN 02112326A CN 1162972 C CN1162972 C CN 1162972C
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- Prior art keywords
- magnetic
- shell
- hall element
- hall
- magnetic patch
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Abstract
The present invention relates to a Hall proximity switch which comprises a shell, Hall elements arranged in the shell, a circuit board of a signal amplification circuit. The present invention is characterized in that magnetic blocks are arranged in the position near the Hall elements arranged in the shell; the Hall elements and the magnetic blocks are arranged in the position of the front end of the shell; the shell is made of non magnetic material, and at least the front wall of the shell is made of non magnetic material so as to ensure that magnetic lines of force pass through the shell. Compared with the prior art, because the Hall elements and the magnetic blocks are packaged in the same shell, magnetizers are arranged in the corresponding position of a mechanical device having relative displacement with the proximity switch when the present invention is installed. When the magnetizers approach or leave the proximity switch, a magnetic field formed by the magnetic blocks in the switch is changed, and thereby, the Hall elements induct and generate signals. The present invention has the advantages of convenient installation, no limit by the installation position, and wide range of application.
Description
Technical field
The present invention relates to a kind of electronic type near switch, particularly a kind of utilize Hall element detection mechanism change in displacement near switch.
Background technology
Proximity Hall switch is to utilize Hall element to the changes of magnetic field of its present position and produce switching signal, existing proximity Hall switch generally is an external magnetic type, also be that magnetic patch is not installed in the proximity Hall switch position, then be provided with magnetic patch with the corresponding position of its mechanical device that relatively moves.Therefore, existing proximity Hall switch generally all must attach a magnetic stripe when selling, its length is then decided according to the stroke of required control, and because magnetic stripe is generally the powder metallurgy material, its installation is subjected to certain restriction, and near the wider lathe of switch application, it is installed has more increased difficulty.The patent No. is that the 3rd embodiment in 90211742.4 the Chinese utility model patent " miniature non-contact switch device " discloses a kind of magnetic patch proximity Hall switch of (it is called " sending out magnet ") that self is equipped with, it is that magnetic patch is oppositely arranged by support and Hall element, and both leave at interval, need the mechanical device of induction that one iron plate then is set in the corresponding position, the gap of inserting or leaving between magnetic patch and the Hall element by iron plate produces changes of magnetic field, thereby makes Hall element induction and trigger switch signal.Therefore this design need not to attach again corresponding magnetic stripe is installed because magnetic patch and Hall element are fixed on the same switch body, only needs to get final product with iron plate is alternative.Yet the structure of this design itself has limited the scope (as can't be applied to relatively with the switch lengthwise movement object) of its application, and must have certain precision when installing and pass in and out gap between magnetic patch and the Hall element freely with the assurance iron plate.In essence, because being oppositely arranged and leaving the structure in gap, its magnetic patch and Hall element still belong to external magnetic type.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of scope of application internal magnetization proximity Hall switch wide, easy for installation at above-mentioned prior art present situation.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this proximity Hall switch includes a housing and is arranged on housing interior Hall element and signal amplification circuit wiring board thereof, it is characterized in that the contiguous Hall element place in housing is provided with magnetic patch, and described Hall element and magnetic patch are arranged on the front position of housing, and described housing antetheca is non-magnetic conductive material, described magnetic patch is to be provided with in pairs, and each is provided with to the both sides of magnetic patch office Hall element and in opposite polarity mode.
Be to save magnetic material, can adopt two pairs and two pairs, and be that magnetic is provided with and in the same way at interval with magnetic inductive block at each magnetic patch of Hall element homonymy with the less magnetic patch of upper volume;
Described Hall element can have only one, also can adopt two, and is provided with in back-to-back mode, and the sensitive surface that makes two Hall elements respectively forward and backwards.
Compared with prior art, because the present invention is encapsulated in Hall element and magnetic patch in the same housing, only needing in the corresponding position with this mechanical device that relatively moves near switch magnetic conductor to be set then during installation gets final product, when magnetic conductor is toward or away from this near switch, to cause the formed changes of magnetic field of magnetic patch in the switch, Hall element therefore and induction and produce signal, so that the present invention installs is very convenient, be not subjected to the restriction of installation site yet, applied widely.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one
Fig. 2 is the structural representation of the embodiment of the invention two.
Fig. 3 is an operation principle schematic diagram of the present invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, be the embodiment of two pairs of magnetic patch of an employing, a Hall element, it includes housing 1 and is arranged on the Hall element 5 of housing 1 Inner Front End position and is arranged on thereafter signal amplification circuit wiring board 2, be respectively arranged with two pairs of magnetic patch 3 at two ends, described Hall element 5 both sides, wherein magnetic patch 3 polarity of homonymy are for being provided with in the same way, and at interval with a magnetic inductive block 4 (can adopt iron block), and office Hall element 5 both sides and relative a pair of magnetic patch 3 polarity are oppositely to be provided with; Described housing 1 its antetheca 11 at least should adopt non-magnetic conductive material, and housing 1 also can all adopt non-magnetic conductive material certainly, passes through outside it to guarantee the magnetic line of force.
As shown in Figure 2, be another embodiment of the present invention, be to have adopted a pair of magnetic patch and two Hall elements with the difference of embodiment one, the both sides of two Hall elements 5 in two magnetic patch 3 offices, its polarity is oppositely to be provided with, two Hall elements 5 then are provided with in back-to-back mode, the sensitive surface that makes two Hall elements 5 respectively forward and backwards, like this, when magnetic conductors (also can be described as ferromagnetic substance) such as iron nickel when housing the place ahead is toward or away from, the Hall element 5 of front will be sensed the enhancing in magnetic field, the Hall element 5 of back then will be sensed weakening of magnetic field, therefore form the differential way of output like this, thereby further improved sensitivity, also can therefore eliminate altitude temperature difference effect simultaneously.
Operation principle of the present invention as shown in Figure 3, frame of broken lines and interior circuit thereof are switch body of the present invention, as magnetic conductor when the place ahead of housing is toward or away from, to cause the formed changes of magnetic field of magnetic patch in the switch, therefore Hall element is responded to and is produced signal, and by signal amplification circuit thereafter signal is amplified and output.
The foregoing description is two preferred embodiments of the present invention, but structure of the present invention is not limited thereto.
Claims (4)
1, a kind of proximity Hall switch, include a housing and be arranged on housing interior Hall element and signal amplification circuit wiring board thereof, it is characterized in that the contiguous Hall element place in housing is provided with magnetic patch, and described Hall element and magnetic patch are arranged on the front position of housing, and described housing antetheca is non-magnetic conductive material, described magnetic patch is to be provided with in pairs, and each is provided with to the both sides of magnetic patch office Hall element and in opposite polarity mode.
2, proximity Hall switch according to claim 1 is characterized in that described magnetic patch has two pairs at least, and each magnetic patch that is positioned at the Hall element homonymy is that magnetic is provided with and in the same way at interval with magnetic inductive block.
3, proximity Hall switch according to claim 1 and 2 is characterized in that described Hall element is one.
4, proximity Hall switch according to claim 1 and 2 is characterized in that described Hall element is two, and is provided with in back-to-back mode, and the sensitive surface that makes two Hall elements respectively forward and backwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021123268A CN1162972C (en) | 2002-06-28 | 2002-06-28 | Proximity Hall switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021123268A CN1162972C (en) | 2002-06-28 | 2002-06-28 | Proximity Hall switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1387317A CN1387317A (en) | 2002-12-25 |
| CN1162972C true CN1162972C (en) | 2004-08-18 |
Family
ID=4741989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021123268A Expired - Fee Related CN1162972C (en) | 2002-06-28 | 2002-06-28 | Proximity Hall switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162972C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320754C (en) * | 2004-08-12 | 2007-06-06 | 何岳明 | Internal magnetic Hall approach switch |
| CN101496281B (en) * | 2006-05-26 | 2013-12-11 | 明大工业有限公司 | Contactless switching system |
| CN101832785B (en) * | 2010-04-12 | 2012-05-16 | 杭州鑫芯电子有限公司 | Regulatable Hall effect sensor |
| CN103063196A (en) * | 2012-12-26 | 2013-04-24 | 江苏茶花电气有限公司 | Rotary drum proximity sensor |
| CN108649943A (en) * | 2018-07-06 | 2018-10-12 | 广东美控电子科技有限公司 | Universal no machinery positioning Hall switch |
| CN108847838A (en) * | 2018-09-02 | 2018-11-20 | 广东美控电子科技有限公司 | Universal no machinery positioning Hall switch |
| CN110260936A (en) * | 2019-07-12 | 2019-09-20 | 厦门市诺特科技发展有限公司 | A kind of Hall detection apparatus of adjustable distance of reaction |
| CN110880927A (en) * | 2019-11-04 | 2020-03-13 | 中国科学院西安光学精密机械研究所 | Integrated proximity switch, proximity switch system and proximity switch manufacturing method |
-
2002
- 2002-06-28 CN CNB021123268A patent/CN1162972C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1387317A (en) | 2002-12-25 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |