CN204229141U - A kind of wired proximity switch - Google Patents
A kind of wired proximity switch Download PDFInfo
- Publication number
- CN204229141U CN204229141U CN201420724848.4U CN201420724848U CN204229141U CN 204229141 U CN204229141 U CN 204229141U CN 201420724848 U CN201420724848 U CN 201420724848U CN 204229141 U CN204229141 U CN 204229141U
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- CN
- China
- Prior art keywords
- proximity switch
- induction installation
- protective device
- terminals
- inductive probe
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Abstract
The utility model discloses a kind of wired proximity switch, comprise LC oscillatory circuit, signal amplifier, switching amplifier, described testee is provided with inductive probe, it is characterized in that: described proximity switch is provided with four terminals, comprise two power ends, often open terminals and normally closed terminals for one, described proximity switch also comprises induction installation, protective device and stop means, described LC oscillatory circuit, signal amplifier, switching amplifier is all located in induction installation, described induction installation and protective device removably connect, and it is spacing fixing by stop means, described inductive probe is arranged at protective device inside, described oscillator stops concussion at inductive probe close to during induction installation.Shock-resistant, can to select the mode of connection needed, adjustable inductive probe induction stroke according to demand critical value, considerably increases the range of application of proximity switch, and its scene be suitable for also becomes more flexible, simple and reasonable easy to implement.
Description
Technical field
The utility model relates to a kind of wired proximity switch.
Background technology
Proximity switch is that one directly contacts and manipulable position switch without the need to carrying out machinery with moving component, when the sensitive surface of object proximity switch is to operating distance, do not need Mechanical Contact and apply any pressure to make switch motion, thus drive DC electric apparatus or provide steering order to computing machine (plc) device.Generally common proximity switch is all inductance type, and inductance type transducer is made up of three parts: oscillator, on-off circuit and amplification output circuit.Oscillator produces an alternating magnetic field.When metal target is close to this magnetic field, and when reaching distance of reaction, in metal target, produce eddy current, thus cause oscillatory extinction, so that failure of oscillation.The change of oscillator vibrates and failure of oscillation is by the process of rear class amplifying circuit and convert switching signal to, triggers drived control device, thus reaches contactless testing goal.Proximity switch is kind of a switch-type sensor (i.e. noncontacting switch), the characteristic of its existing travel switch, microswitch, there is sensing capabilities simultaneously, and reliable in action, stable performance, frequency response is fast, and application life is long, and antijamming capability waits by force and has waterproof, the feature such as shockproof, corrosion-resistant.Product has inductance type, condenser type, Hall-type, cross, straight flow pattern.Proximity switch, also known as contactless proximity switch, is desirable electronic switch quantity sensor.When the induction region of metal detection body proximity switch, switch just can be contactless, without pressure, no-spark, send electrical command rapidly, accurate response goes out position and the stroke of motion, namely general Stroke Control is used in, the convenience of its positioning precision, operating frequency, serviceable life, mounting and adjusting and the applicable ability to rugged surroundings are that common mechanical formula travel switch institute is incomparable.It is widely used in the industries such as lathe, metallurgy, chemical industry, light textile and printing.In automatic control system, can be used as spacing, counting, positioning control and automatic protection ring joint etc., but along with the field of proximity switch application more and more wider, its voltage endurance capability, regulating power, adaptive faculty all needs to improve constantly.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of and shock-resistantly adjustablely normally closedly often opens double-contact proximity switch.
For achieving the above object, the utility model provides following technical scheme: a kind of wired proximity switch, comprise LC oscillatory circuit, signal amplifier, switching amplifier, described proximity switch is provided with four terminals, comprise two power ends, often open terminals and normally closed terminals for one, described proximity switch also comprises induction installation, protective device and stop means, described induction installation and protective device removably connect, described stop means is located in induction installation, described LC oscillatory circuit, signal amplifier, switching amplifier is all located in induction installation, described LC oscillatory circuit stops concussion at inductive probe close to during induction installation.
When this proximity switch is connected with the mains, LC oscillating circuit shakes, what signal amplifier and switching amplifier can continue receives signal, and make Chang Kai and normally closed contact keep original state, the circuit terminal that user can select oneself to need according to demand carries out wiring, make contact-making switch usable range wider, then by the setting of protective device, ensure that inductive probe can not strike induction installation in moving process, like this, this proximity switch just can be applicable to hydraulic pressure, the crashworthinesses such as air pressure require higher field, add range of application of the present utility model, and the relative position of induction installation and protective device is regulated by stop means, realize the adjustment to induction contact induction stroke, the scene that the utility model can be suitable for can increase again greatly, modal proximity switch on the utility model relative market, its scene be suitable for increases greatly, and security have also been obtained larger raising.
The utility model can be set to further: described induction installation is provided with male-pipe, described protective device is provided with fixed part, described fixed part is threaded with described male-pipe by internal thread, and described protective device is also provided with the first external thread for being fixed on testee.
By the setting that the first external thread is pullover with induction, achieve inductive probe and induction installation physical isolation, but according to electromagnetic field, induction installation still can judge that whether inductive probe is close, then by by the first externally threaded setting, the effect fixed just can be realized.
The utility model can be set to further: described stop means comprises and is threadedly connected to the hexagonal (hexagon)nut of described male-pipe for limit protection device.
By rotary inductive device, can regulating the relative distance of induction installation and protective device, arrange the critical value of induction contact stroke, then realizing position-limiting action by screwing hexagonal (hexagon)nut, structure is simple, but successful.
The utility model can be set to further: described induction installation also comprises a NPN pipe, and its emitter is connected to describedly often opens terminals, and its collector is connected to power level, and its base stage is connected to switching amplifier output terminal; 2nd NPN pipe, its emitter is connected to described normally closed terminals, and its collector is connected to described power level; Phase inverter, its output terminal is connected to the 2nd NPN pipe base stage, and its input end is connected to switching amplifier output terminal.
NPN pipe provides response speed faster compared to other on-off element, and not fragile inefficacy, highly sensitive, the more important thing is the spatial volume having saved proximity switch and the production cost realizing double-contact.
Compared to prior art, the utility model creates following beneficial effect: shock-resistant, can to select the mode of connection needed, adjustable inductive probe induction stroke according to demand critical value, considerably increase the range of application of proximity switch, and its scene be suitable for also becomes more flexible, simple and reasonable easy to implement.
Accompanying drawing explanation
Fig. 1 is the utility model cut-open view;
Constructional appearance figure when Fig. 2 is the utility model adjustable range;
Fig. 3 is the utility model constructional appearance figure when fixing;
Fig. 4 is the utility model induction installation structural drawing;
Fig. 5 is the utility model protective device face upwarding assumption diagram;
Fig. 6 is the utility model protective device plan structure figure;
Fig. 7 is the utility model circuit diagram.
Description of reference numerals: 1, induction installation; 11, inductive coil; 12, male-pipe; 13, power supply positive input terminal; 14, power-input end; 15, often terminals are opened; 16, normally closed terminals; 2, protective device; 21, the first external thread; 22, respond to pullover; 23, fixed part; 3, stop means; 4, inductive probe.
Embodiment
Shown in Fig. 7, a kind of wired proximity switch as shown in Figure 7, comprises LC oscillatory circuit, signal amplifier, switching amplifier, and proximity switch is provided with four terminals, comprise two power ends, one often open terminals 15 and normally closed terminals 16; Proximity switch also comprises induction installation 1, protective device 2 and stop means 3, LC oscillatory circuit, signal amplifier, switching amplifier is all located in induction installation 1, shown in Fig. 3, induction installation 1 and protective device 2 removably connect, and the relative distance both regulating by stop means 3, induction installation 1 inside is provided with inductive probe 4, and oscillator stops concussion at inductive probe 4 close to during induction installation 1.When this proximity switch is connected with the mains, LC oscillating circuit shakes, what signal amplifier and switching amplifier can continue receives signal, and make Chang Kai and normally closed contact keep original state, the circuit terminal that user can select oneself to need according to demand is carried out wiring and is directly connected with computer or control terminal by PLC, make contact-making switch usable range wider, then by the setting of protective device 2, ensure that inductive probe 4 can not strike induction installation 1 in moving process, the all structures of protective device 2 are synthesis steel integrally casting, in it, impact value can reach 200KG, this proximity switch just can be applicable to hydraulic pressure, the crashworthinesses such as air pressure require higher field, add range of application of the present utility model, and the relative position of induction installation 1 and protective device 2 is regulated by stop means 3, realize the adjustment to induction contact induction stroke, the scene that the utility model can be suitable for can increase again greatly.Shown in Fig. 4, induction installation 1 comprises the first external thread 21, responds to pullover 22 and fixed part 23, first external thread 21 engages with the internal thread at inductive probe 4 place, and inductive probe 4 is arranged in induction pullover 22, and fixed part 23 is provided with the internal thread for fixing induction installation 1.By the setting of the first external thread 21 with induction pullover 22, achieve inductive probe 4 and induction installation 1 physical isolation, but according to electromagnetic field, induction installation 1 still can judge that whether inductive probe 4 is close, then by arranging screw thread at fixed part 23, the effect fixed just can be realized.Induction installation 1 is provided with male-pipe 12, threaded line pipe inner hollow, and stop means 3 comprises the hexagonal (hexagon)nut be arranged on male-pipe 12, and male-pipe 12 and fixed part 23 are spirally connected.By rotary inductive device 1; the relative distance of induction installation 1 and protective device can be regulated; namely regulate the ultimate range of inductive probe 4 and inductive coil 11; when supposing to need inductive probe 4 displacement 2CM; proximity switch action; then arranging inductive probe 4 with coil relative distance is 2CM; when being less than below 2CM like this; coil all can not sending action signal value proximity switch of the present utility model; the critical value of induction contact stroke is set; then realize fixation by screwing hexagonal (hexagon)nut, structure is simple, but successful.With reference to shown in Fig. 7, induction installation 1 also comprises a NPN pipe Q1, and its emitter is connected to often opens terminals 15, and its collector is connected to power level, and its base stage is connected to switching amplifier output terminal; 2nd NPN pipe Q2, its emitter is connected to normally closed terminals 16, and its collector is connected to power level; Phase inverter, its output terminal is connected to the 2nd NPN pipe Q2 base stage, and its input end is connected to switching amplifier output terminal.NPN pipe provides response speed faster compared to other on-off element, and not fragile inefficacy, highly sensitive, the more important thing is the spatial volume having saved proximity switch and the production cost realizing double-contact.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. a wired proximity switch, comprise LC oscillatory circuit, signal amplifier, switching amplifier, it is characterized in that: described proximity switch is provided with four terminals, comprise two power ends, often open terminals and normally closed terminals for one, described proximity switch also comprises induction installation, protective device and stop means, described induction installation and protective device removably connect, described stop means is located in induction installation, described LC oscillatory circuit, signal amplifier, switching amplifier is all located in induction installation, described LC oscillatory circuit stops concussion at inductive probe close to during induction installation.
2. the wired proximity switch of one according to claim 1, it is characterized in that: described induction installation is provided with male-pipe, described protective device is provided with fixed part, described fixed part is threaded with described male-pipe by internal thread, and described protective device is also provided with the first external thread for being fixed on testee.
3. the wired proximity switch of one according to claim 2, is characterized in that: described stop means comprises and is threadedly connected to the hexagonal (hexagon)nut of described male-pipe for limit protection device.
4. the wired proximity switch of one according to claim 1 or 2 or 3, is characterized in that: described induction installation also comprises
One NPN pipe, its emitter is connected to describedly often opens terminals, and its collector is connected to power level, and its base stage is connected to the output terminal of switching amplifier;
2nd NPN pipe, its emitter is connected to described normally closed terminals, and its collector is connected to described power level;
Phase inverter, its output terminal is connected to the 2nd NPN pipe base stage, and its input end is connected to the output terminal of switching amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420724848.4U CN204229141U (en) | 2014-11-26 | 2014-11-26 | A kind of wired proximity switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420724848.4U CN204229141U (en) | 2014-11-26 | 2014-11-26 | A kind of wired proximity switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204229141U true CN204229141U (en) | 2015-03-25 |
Family
ID=52927215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420724848.4U Expired - Fee Related CN204229141U (en) | 2014-11-26 | 2014-11-26 | A kind of wired proximity switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204229141U (en) |
-
2014
- 2014-11-26 CN CN201420724848.4U patent/CN204229141U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20191126 |