CN105811954B - A kind of close switch of electronic type - Google Patents
A kind of close switch of electronic type Download PDFInfo
- Publication number
- CN105811954B CN105811954B CN201610338246.9A CN201610338246A CN105811954B CN 105811954 B CN105811954 B CN 105811954B CN 201610338246 A CN201610338246 A CN 201610338246A CN 105811954 B CN105811954 B CN 105811954B
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- China
- Prior art keywords
- switch
- close
- pedestal
- switching circuit
- circuit
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
- H03K2017/9455—Proximity switches constructional details
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- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
The invention discloses a kind of close switches of electronic type, including switch pedestal and switch main body, it is located in the switch pedestal to the switch body portion, the part that the switch main body is located in the switch pedestal includes PCB circuit board, switching circuit is formed in the PCB circuit board, it is characterised in that: the switching circuit includes the MR magnetoresistive chip for incuding external magnetic field variation.By MR magnetoresistive chip as sensing element, have the characteristics that shatter-proof, heatproof, high sensitivity, influence of the percussion vibration thought when general transportability vibration or switch installation to internal circuit will be reduced, it may make stable close to switch performance, reliable and practical, even if can also keep working normally in the lower situation of outdoor environment temperature.
Description
Technical field
The present invention relates to a kind of switch, the close switch of especially a kind of electronic type.
Background technique
Current existing elevator or the close switch of elevator leveling are the bistable switches of tongue tube classification.Principle is to use
There are two open spring leaf can be closed in glass tube, bead or magnetic sheet are covered on tongue tube, is driven using external big magnet dry
Reed pipe closure, big magnet leave after since the bead on tongue tube is magnetic, still maintain the tongue in tongue tube and close
Conjunction state, when the big magnet of external drive reversely back when, can be by since the magnetism bead more fixed than on tongue tube is magnetic big
The tongue of tongue tube closure is opened, and the function of protecting magnetic is realized with this.
Current this construction of switch performance is unstable, and shock resistance is poor, and low temperature environment uses high failure rate, in actual use
Having the following deficiencies: in 1, switch use environment can all cause since transport vibration, installation percussion, including switch drop on the ground
Changing and cisco unity malfunction occurs in tongue spacing inside tongue tube, is that shock resistance is poor；2, the tongue tube in low temperature environment
Internal tongue, which will appear variation, causes switch abnormal.Especially performance switch will appear one at a temperature of -20 DEG C of northern area
Straight closure, can not work, elevator can not work normally.3, existing switch does not have LED indication function, due to being in close to switch
The bad and not easy to install position of line-of-sight circumstances can not intuitively judge this close to switch when the elevator lifting system failure
Working condition, need to switch disassembly under judged again with supplementary instrument, make troubles in this way to the subsequent after-sales service of elevator.
In addition, existing bistable switch, external circuits are 3 wire types, as shown in Fig. 8-1 and Fig. 8-2, due to the master of switch
Circuit is itself divided into two kinds of circuits of NPN and PNP, and switching access subsequent conditioning circuit is converter circuit: first, conventional frequency converter
There are anode, negative power supply terminal and signal input terminal, converter circuit itself also there are two kinds of circuits of NPN and PNP, is using 3
When the switch of wire type, it is necessary to access the switch of corresponding NPN and PNP circuit, otherwise switch can not be normal, thus leads to the mode of connection
It is complicated；Second, the frequency converter of mainstream, only one signal input terminal, a common end, the two are used to switch currently on the market
Wiring, then 3 wire types switch can not be accessed normally, and versatility is insufficient.In addition, 3 wire types switch the power consumption half of itself on the left side 1mA
The right side, excessively high oneself power consumption are unfavorable for the load circuit of frequency converter, and if taking over more 3 wire types switches, feelings
Possibly even frequency converter is caused to burn when condition is serious.
Summary of the invention
The technical problem to be solved by the present invention is in view of the above-mentioned problems of the prior art, providing a kind of performance stabilization
Electronic type close to switch.
The technical scheme of the invention to solve the technical problem is: a kind of close switch of electronic type, including switch
Pedestal and switch main body are located in the switch pedestal to the switch body portion, and the switch main body is located at the switch
Part in pedestal includes PCB circuit board, is formed with switching circuit in the PCB circuit board, it is characterised in that: the switch electricity
Road includes the MR magnetoresistive chip for incuding external magnetic field variation.
To intuitively indicate the working condition close to switch, the close switch further includes connecting with the switching circuit
LED light.
To make switch be conveniently adjusted position when installing, thread segment, the switch pedestal are formed in the switch pedestal
On also set up nut there are two opposite knob, with thread segment cooperation.
Preferably, to provide certain adjustment amount, the length of the thread segment is no less than the switch pedestal overall length
1/3.
To avoid the switching circuit of PCB circuit board by external interference, it is ensured that work normally, further include switch housing lid
Plate, the switch main body are located at switch housing cover board side, include that the PCB circuit board is inserted partially into switch bottom
In seat, the part that the switch main body is located at the switch housing cover board other side is then extended outside the switch pedestal, described
Switch housing cover board is abutted with the bottom of the switch pedestal.
Optionally, the switching circuit is bistable circuit, normally opened circuit or normally-closed circuit.
Preferably, the switching circuit is bistable circuit, and the switching circuit, which is drawn, respectively indicates anode and cathode
Two conducting wires.
Preferably, the switching circuit further includes that the pressure stabilizing electricity of stable operating voltage is provided for the MR magnetoresistive chip
The output end of road and analogue quantity switch, the MR magnetoresistive chip is connected to the input terminal of the analogue quantity switch, the simulation
Cathode output end of the output end of switch as switching circuit is measured, the ground terminal of the MR magnetoresistive chip is as the negative of switching circuit
Pole output end, the conducting wire are drawn from the cathode output end and cathode output end respectively.
Preferably, the analogue quantity switch is metal-oxide-semiconductor or triode.
Compared with the prior art, the advantages of the present invention are as follows: by MR magnetoresistive chip as sensing element, have shatter-proof, resistance to
The characteristics of temperature, high sensitivity, the percussion vibration thought when the general transportability vibration of reduction or switch are installed is to internal circuit
Influence, may make it is stable close to switch performance, reliable and practical, even if can also be protected in the lower situation of outdoor environment temperature
Hold normal work；LED light can pilot switch at any time working condition, determine whether switch abnormal, the anti-vibration resistance of switch
By force；Using 2 wire type wiring, patching operations are more simple, and have better versatility, and oneself power consumption is lower, for frequency conversion
The influence of the load circuit of device is little.
Detailed description of the invention
Fig. 1 is the schematic diagram of one embodiment of the invention close to switch；
Fig. 2 is the decomposition texture schematic diagram close to switch of Fig. 1；
Fig. 3 is the schematic diagram of second embodiment of the invention close to switch；
Fig. 4 is the decomposition texture schematic diagram close to switch of Fig. 2；
Fig. 5 is the switching circuit figure of the invention close to switch；
Fig. 6 uses schematic diagram close to switch one embodiment to be of the invention；
Fig. 7 is the practical schematic diagram of the invention close to another embodiment of switch；
Fig. 8-1 is 3 line electronic switch circuits (NPN type circuit) of the prior art；
Fig. 8-2 is 3 line electronic switch circuits (positive-negative-positive circuit) of the prior art.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Embodiment one
Referring to Fig. 1 and Fig. 2, a kind of electronic type is close switchs, including switch pedestal 1 and switch main body 2, on switch main body 2
It is provided with switch housing cover board 3, switch main body 2 is located at being inserted partially into switch pedestal 1 of 3 side of switch housing cover board, opens
The part that pass main body 2 is located at 3 other side of switch housing cover board is then extended outside switch pedestal 1, switch housing cover board 3 and switch bottom
The bottom of seat 1 abuts.
It includes PCB circuit board 21 that switch main body 2, which is located at the part in switch pedestal 1, and PCB circuit board 21 includes MR magnetic resistance core
Piece 211, can incude the variation in the magnetic field of extraneous magnet, and export high level or low level.As when sensing external magnetic field from low
When level becomes high level, export high level, when magnetic field far from when, still output high level, only when sensing opposite magnetic
When field, low level is just exported.Due to using MR magnetoresistive chip 211, has the characteristics that shatter-proof, heatproof, high sensitivity, one will be reduced
As transportability vibration or the influence close to percussion vibration artificial when switch installation to internal circuit, may make close to switch performance
It is stable, reliable and practical, even if can also keep working normally in the lower situation of outdoor environment temperature.
It can be formed in PCB circuit board 21 by MR magnetoresistive chip 211 and other electric component groups into bistable circuit, it can also
To be designed to normally opened circuit or normally-closed circuit.Two, which are drawn, by switching circuit in PCB circuit board 21 respectively indicates anode, cathode
Conducting wire 22,23 is drawn behind the part that switch housing cover board 3 and switch main body 2 are located at outside switch pedestal 1, for being connected to
Frequency converter.
It is formed with thread segment 11 in switch pedestal 1, is such as located at close to the position of bottom, the length of thread segment 11 is no less than opened
Close the 1/3 of 1 total length of pedestal.There are two opposite knob and thread segment 11 is also set up on the thread segment 11 of switch pedestal 1 to cooperate
Nut 12, thus can will be fixed in mounting bracket close to switch, and can front and back regulating switch position.
Embodiment two
It the difference is that, further include LED indication with above-described embodiment one in the present embodiment referring to Fig. 3 and Fig. 4
Lamp 4 is connect with the switching circuit in PCB circuit board 21, for monitoring the working condition close to switch at any time, is determined close to switch
Whether abnormal, the anti-vibration resistance close to switch is strong.Offer mounting hole 31 on switch housing cover board 3, indicator light 4 is from mounting hole 31
Across switch housing cover board 3, so that luminous component is exposed to outside switch pedestal 1, it can be in external visual supervisory control.
Referring to Fig. 5, the circuit in PCB circuit board 21 is the bistable being made of MR magnetoresistive chip 211 and other electronic components
State switching circuit further includes voltage regulator circuit 212 and analogue quantity switch Q1 in addition to MR magnetoresistive chip 211, and voltage regulator circuit 212 connects
In the positive terminal and ground terminal of MR magnetoresistive chip 211, stable operating voltage is provided for MR magnetoresistive chip 211, usually 1.8~
3.3V；The output end of MR magnetoresistive chip 211 is then connected to the input terminal of analogue quantity switch Q1, and the output end of analogue quantity switch Q1 is then
Cathode output end of the ground terminal of cathode output end OUT1, MR magnetoresistive chip 211 as switching circuit as switching circuit
It is respectively that anode and the external of cathode are led that OUT2, i.e. the cathode output end OUT1 and cathode output end OUT2 of switching circuit, which are only drawn,
Line 22,23.
In the present embodiment, voltage regulator circuit 212 includes zener diode D1 and capacitor C1, and analogue quantity switch Q1 is three poles
Pipe, such as PNP type triode, the output end of MR magnetoresistive chip 211 are connected to the base stage of triode, the grounded collector of triode,
And emitter is then used as the anode output of switching circuit.Alternatively, analogue quantity switch Q1 can also use metal-oxide-semiconductor.
To be linked into above-mentioned indicator light 4 in switching circuit, one end of indicator light 4 is connected to analogue quantity switch Q1
Collector, the other end is connected to cathode output end OUT2.
For the safety for improving switching circuit, switching circuit further includes overload protecting circuit, reverse-connection protection circuit, over-voltage guarantor
Protection circuit, current foldback circuit etc..
Above-mentioned this 2 line type structure, patching operations are more simple；No matter the circuit of frequency converter is NPN type or positive-negative-positive,
Circuit close to switch only has one kind, it is only necessary to illustrate to access different ports according to frequency converter, be further simplified operation；
Except be suitable for positive and negative terminals frequency converter in addition to, for the frequency converter of only one signal input part and common end, only need by
Anode access signal input part, cathode access common end, have better versatility；In addition, being opened using the close of 2 wire types
It closes, the power consumption of its own belongs to micro energy lose, the influence for the load circuit of frequency converter is little in 10 μ A or so.
Referring to Fig. 6, switching circuit is bistable circuit.In use, of the invention be installed to close to switch is needed to detect
The elevator car roof of position, the signal close to switch can be provided on elevator shaft for transmission in the control circuit of elevator
Magnetic stripe 5, magnetic stripe 5 are single side bipolarity, and magnetic stripe 5 and the vertical range close to switch are about 10~20cm or so.Close to switch edge
The direction of motion above and below carriage acts on magnetic stripe 5, with respect to the initial position that magnetic stripe 5 moves is S pole-face, end position N in Fig. 6
Pole-face, i.e., when elevator rises until close to switch close to the S pole-face of magnetic stripe 5, Continuity signal is transmitted in switching circuit closure conducting
To control system, floor or the position close to switch and lift car are determined, indicator light 4 lights, and keeps this state；When
When being moved to the N pole-face of magnetic stripe 5 close to the position of the switch, switching circuit is disconnected, and indicator light 4 extinguishes at this time；It is left when close to switch
When magnetic stripe 5, it is maintained at off-state, until recycling close to next magnetic stripe 5 with this.
Referring to Fig. 7, switching circuit is normally open circuit, and the magnetic stripe 5 of cooperation is single side unipolarity.When elevator rise until
When close to switch close to magnetic stripe 5, Continuity signal is transferred to control system by switching circuit closure conducting, determine close to switch and
The floor of lift car or position, indicator light 4 light, and keep this state；Magnetic is left when being moved to close to the position of the switch
When item 5, switching circuit is disconnected, and indicator light 4 extinguishes at this time, and keeps this state；When leaving magnetic stripe 5 close to switch, protect
It holds in off-state, is closed when close to next magnetic stripe 5, is recycled with this again.
If switching circuit is normally off circuit, then with it is shown in Fig. 7 similar, it is different be only that switching circuit conducting and
The state of disconnection is opposite.
Claims (6)
1. a kind of close switch of electronic type, including switch pedestal (1) and switch main body (2), switch main body (2) the part status
In the switch pedestal (1), the part that the switch main body (2) is located in the switch pedestal (1) includes PCB circuit board
(21), switching circuit is formed on the PCB circuit board (21), it is characterised in that: the switching circuit includes for incuding
The MR magnetoresistive chip (211) of external magnetic field variation, the switching circuit are bistable circuit, and the switching circuit further includes for institute
It states MR magnetoresistive chip (211) and the voltage regulator circuit (212) and analogue quantity switch (Q1) of stable operating voltage, the MR is provided
The output end of magnetoresistive chip (211) is connected to the input terminal of the analogue quantity switch (Q1), the analogue quantity switch (Q1) it is defeated
Cathode output end (OUT1) of the outlet as switching circuit, the ground terminal of the MR magnetoresistive chip (211) is as switching circuit
It is positive and negative to draw expression from the cathode output end (OUT1) and cathode output end (OUT2) respectively for cathode output end (OUT2)
The conducting wire (22,23) of pole, to constitute 2 wire type switching circuits.
2. the close switch of electronic type as described in claim 1, it is characterised in that: described to further include and the switch close to switch
The LED light (4) of circuit connection.
3. the close switch of electronic type as described in claim 1, it is characterised in that: be formed with screw thread on the switch pedestal (1)
Section (11) also sets up nut there are two opposite knob, with the thread segment (11) cooperation on the switch pedestal (1)
(12)。
4. the close switch of electronic type as claimed in claim 3, it is characterised in that: the length of the thread segment (11) is no less than institute
State the 1/3 of switch pedestal (1) overall length.
5. the close switch of electronic type as described in any one of claims 1 to 4, it is characterised in that: further include switch housing lid
Plate (3), the switch main body (2) be located at switch housing cover board (3) side, include the PCB circuit board (21) portion
Divide and be inserted into switch pedestal (1), the part that the switch main body (2) is located at switch housing cover board (3) other side is then prolonged
Stretch out the switch pedestal (1) outside, the switch housing cover board (3) abuts with the bottom of the switch pedestal (1).
6. the close switch of electronic type as described in any one of claims 1 to 4, it is characterised in that: the analogue quantity switch
It (Q1) is metal-oxide-semiconductor or triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610338246.9A CN105811954B (en) | 2016-05-19 | 2016-05-19 | A kind of close switch of electronic type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610338246.9A CN105811954B (en) | 2016-05-19 | 2016-05-19 | A kind of close switch of electronic type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105811954A CN105811954A (en) | 2016-07-27 |
| CN105811954B true CN105811954B (en) | 2019-04-09 |
Family
ID=56452631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610338246.9A Active CN105811954B (en) | 2016-05-19 | 2016-05-19 | A kind of close switch of electronic type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105811954B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19602681C1 (en) * | 1996-01-25 | 1997-07-24 | Siemens Ag | Electronic, non-contact switching device |
| JP2001091659A (en) * | 1999-09-17 | 2001-04-06 | Murata Mfg Co Ltd | Steel ball detection sensor |
| CN102112384A (en) * | 2008-08-12 | 2011-06-29 | 通力股份公司 | Arrangement and method for determining position of elevator car |
| CN205792509U (en) * | 2016-05-19 | 2016-12-07 | 宁波华兴伟业电子科技开发有限公司 | A kind of electronic type proximity switch |
-
2016
- 2016-05-19 CN CN201610338246.9A patent/CN105811954B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19602681C1 (en) * | 1996-01-25 | 1997-07-24 | Siemens Ag | Electronic, non-contact switching device |
| JP2001091659A (en) * | 1999-09-17 | 2001-04-06 | Murata Mfg Co Ltd | Steel ball detection sensor |
| CN102112384A (en) * | 2008-08-12 | 2011-06-29 | 通力股份公司 | Arrangement and method for determining position of elevator car |
| CN205792509U (en) * | 2016-05-19 | 2016-12-07 | 宁波华兴伟业电子科技开发有限公司 | A kind of electronic type proximity switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105811954A (en) | 2016-07-27 |
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