CN220492973U

CN220492973U - Magnetic switch

Info

Publication number: CN220492973U
Application number: CN202322181515.3U
Authority: CN
Inventors: 金学财
Original assignee: Zhejiang Laixing Technology Co ltd
Current assignee: Zhejiang Laixing Technology Co ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2024-02-13
Anticipated expiration: 2033-08-14

Abstract

The utility model belongs to the technical field of magnetic switches, and particularly relates to a magnetic switch, which comprises: a housing for protecting the magnetic switch; the wire is used for connecting an external load through the magnetic switch; the circuit board, the circuit board is provided with voltage stabilizing circuit, hall element induction circuit and execution circuit, wherein, the positive pole of external DC power supply of input of voltage stabilizing circuit, hall element induction circuit's input links to each other with voltage stabilizing circuit's output, the output of the input termination hall element induction circuit of execution circuit, the beneficial effect of the utility model is: the magnetic switch is composed of a shell, a wire and a circuit board, wherein the circuit board adopts a voltage stabilizing circuit, a Hall element sensing circuit and an executing circuit, and has the advantages of higher sensitivity, long service life and good reliability.

Description

Magnetic switch

Technical Field

The utility model belongs to the technical field of magnetic switches, and particularly relates to a magnetic switch.

Background

The magnetic switch is a switch element controlled by magnetic field signal, has no magnetic break, can be used for detecting the state of circuit or mechanical movement, and is a proximity switch, door magnetic switch and induction switch which are all the above-mentioned in the market, and is characterized by that it has a plastic shell with a standard size, and the reed pipe is sealed in the black shell, and the other half of plastic shell with magnet is fixed on the other end, when the magnet is close to the switch with wire, the switch signal is sent, and the general signal distance is 10mm, and said invented product can be extensively used on the electronic instrument equipment of burglary-resisting door, domestic door, printer, facsimile machine, telephone set and others, and another magnetic switch is a magnetic reed switch with one or several points in closed metal or plastic tube, then the tube is passed through one or several floating balls with ring-shaped magnet, and the above-ball and magnetic reed switch are controlled by means of fixed ring, and the floating ball can be floated up and down in a certain range, and the contact point of the magnetic reed switch can be attracted by magnet in the floating ball so as to produce the action related to switch.

At present, part of magnetic switch circuits adopt reed pipes as magnetic detection devices, and the magnetic switch has the advantages of lower sensitivity, narrower applicable voltage range, short service life due to the lack of power input protection and poor reliability.

Disclosure of Invention

The utility model aims at solving the technical problems, and provides a magnetic switch which achieves the effects of high sensitivity and long service life.

In view of this, the present utility model provides a magnetic switch comprising:

a housing for protecting the magnetic switch;

the wire is used for connecting an external load through the magnetic switch;

a circuit board provided with a voltage stabilizing circuit, a Hall element sensing circuit and an executing circuit,

the input end of the voltage stabilizing circuit is externally connected with the positive electrode of the direct current power supply, the input end of the Hall element sensing circuit is connected with the output end of the voltage stabilizing circuit, and the input end of the executing circuit is connected with the output end of the Hall element sensing circuit.

Further, the voltage stabilizing circuit further includes:

the input pin Vin of the voltage regulator U1 is an input end of a voltage stabilizing circuit, the output pin Vout is an output end of the voltage stabilizing circuit, and the grounding pin GND is grounded;

the filter capacitor C1 is connected between the output pin Vout of the voltage regulator U1 and the ground.

Further, the hall element sensing circuit further includes:

the input pin of the Hall element U2 is connected with the output end of the voltage stabilizing circuit and the grounding pin GND is grounded.

Further, the hall element sensing circuit further includes:

the LED1, the positive pole of the stated luminescent diode LED1 connects the positive pole of the direct-flow power;

a third resistor R3, wherein a first end of the third resistor R3 is connected with the cathode of the light emitting diode LED 1;

the collector of the first NPN triode Q1 is connected with the second end of the third resistor R3;

and a first resistor R1, wherein a first end of the first resistor R1 is connected with the base electrode of the first NPN triode Q1.

Further, the execution circuit further includes:

the base electrode of the second NPN triode Q2 is connected with the output pin VOUT of the Hall element U2, the collector electrode is externally connected with the output terminal of the magnetic circuit, and the emitter electrode is grounded;

and a second resistor R4, wherein the second end of the fourth resistor R4 is connected with the base electrode of the second NPN triode Q2.

Further, the circuit board further includes:

and the second resistor R2 is connected with the output pin VOUT of the Hall element U2.

The beneficial effects of the utility model are as follows:

1. the magnetic switch is composed of a shell, a wire and a circuit board, wherein the circuit board adopts a voltage stabilizing circuit, a Hall element sensing circuit and an executing circuit, and has the advantages of higher sensitivity, long service life and good reliability;

2. the magnetic switch further comprises a second resistor R2, wherein the second end of the second resistor R2 is connected with the output pin VOUT of the Hall element U2, and the second resistor R2 is a pull-up resistor and provides bias at high potential.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a system diagram of the present utility model;

FIG. 3 is a schematic circuit diagram of the overall circuit of the present utility model;

FIG. 4 is a schematic diagram of the circuit principle of the voltage stabilizing circuit of the present utility model;

FIG. 5 is a schematic circuit diagram of a Hall element sensing circuit of the present utility model;

FIG. 6 is a schematic circuit diagram of an implementation circuit of the present utility model;

figure 7 is a schematic diagram of the circuit principle of the second resistor of the present utility model,

the reference numerals in the drawings are:

1. a housing; 2. a wire; 3. a circuit board; 31. a voltage stabilizing circuit; 32. a hall element sensing circuit; 33. and executing a circuit.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some of the embodiments of the present application, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

In the description of the present application, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. For ease of description, the dimensions of the various features shown in the drawings are not drawn to actual scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Example 1:

the present embodiment provides a magnetic switch including:

a housing 1, wherein the housing 1 is used for protecting a magnetic switch;

a wire 2, wherein the wire 2 is used for connecting an external load through a magnetic switch;

a wiring board 3, the wiring board 3 being provided with a voltage stabilizing circuit 31, a hall element sensing circuit 32 and an executing circuit 33,

the input end of the voltage stabilizing circuit 31 is externally connected with the positive electrode of the direct current power supply, the input end of the hall element sensing circuit 32 is connected with the output end of the voltage stabilizing circuit 31, and the input end of the executing circuit 33 is connected with the output end of the hall element sensing circuit 32.

In this embodiment, the magnetic switch includes casing 1, wire 2 and circuit board 3, and casing 1 is used for protecting the magnetic switch, and wire 2 is used for the magnetic switch to connect external load, the magnetic switch is provided with stabilizing circuit 31, hall element sensing circuit 32 and execution circuit 33, and stabilizing circuit 31's the positive pole of external DC power supply of input, hall element sensing circuit 32's input links to each other with stabilizing circuit 31's output, and execution circuit 33's input termination hall element sensing circuit 32's output, and when the magnetic field was close to, the magnetic switch sent switching signal, and when the magnetic field was left, the magnetic switch disconnected switching signal, the magnetic switch reaches the effect that sensitivity is high.

Example 2:

the present embodiment provides a magnetic switch having the following technical features in addition to the technical scheme including the above embodiments.

Further, the voltage stabilizing circuit 31 further includes:

the input pin Vin of the voltage regulator U1 is the input end of the voltage stabilizing circuit 31, the output pin Vout is the output end of the voltage stabilizing circuit 31, and the ground pin GND is grounded;

In this embodiment, the voltage stabilizing circuit 31 further includes a voltage stabilizer U1 and a filter capacitor C1, the input pin Vin of the voltage stabilizer U1 is an anode of an external dc power supply connected to the input end of the voltage stabilizing circuit 31, the output pin Vout is an output end of the voltage stabilizing circuit 31, and the ground pin GND is grounded, the filter capacitor C1 is connected between the output pin Vout of the voltage stabilizer U1 and the ground, and the voltage stabilizer U1 ensures that the magnetic switch can be normally used under 24V dc voltage, and provides a stable voltage for the circuit.

Example 3:

Further, the hall element sensing circuit 32 further includes:

the input pin of the Hall element U2 is connected with the output end of the voltage stabilizing circuit 31 and the grounding pin GND is grounded.

In this embodiment, the hall element sensing circuit 32 includes a hall element U2, a power supply pin VDD of the hall element is used as a power supply input terminal of the hall element sensing circuit 32 to be connected to an output terminal of the regulated power supply circuit, a ground pin GND of the hall element U2 is grounded, the hall element is used to detect a magnetic field change, when the magnetic field approaches the hall element, a voltage of an output pin VOUT of the hall element is changed from 0V to 5V, and when the magnetic field is far from an sensing range of the hall element, the voltage of the output pin VOUT of the hall element is changed from 5V to 0V.

Example 4:

Further, the hall element sensing circuit 32 further includes:

In this embodiment, the hall element sensing circuit 32 further includes a light emitting diode LED1, a third resistor R3, a first NPN triode Q1 and a first resistor R1, where an anode of the light emitting diode LED1 is connected to an anode of an external dc power supply, a cathode of the light emitting diode LED1 is connected to a first end of the third resistor R3, a second end of the third resistor R3 is connected to a collector of the first NPN triode Q1, a base of the first NPN triode Q1 is connected to a first end of the first resistor R1, when the hall element senses a change in magnetic field, a voltage of an output pin VOUT of the hall element is changed from 0V to 5V, the third resistor R3, the light emitting diode LED1, the first NPN triode Q1 and the first resistor R1 are turned on, and then the light emitting diode LED1 emits light, action information of a magnetic switch is provided, and meanwhile, under the condition that the voltage difference between two ends of the resistors conforms to a conduction condition of the first NPN triode Q1, the first NPN triode Q1 jumps, the third resistor R3 is further used as a current of the light emitting diode 1 in the circuit, the current limiting resistor R1 is further adjusted, and the first NPN triode Q1 is further adjusted, and the current of the first resistor R1 is further limited.

Example 5:

Further, the execution circuit 33 further includes:

In this embodiment, the execution circuit 33 includes a second NPN triode Q2 and a fourth resistor R4, the base of the second NPN triode Q2 is connected to the output pin VOUT of the hall element U2, the collector is connected to the output terminal of the magnetic circuit, the emitter is grounded, the second end of the fourth resistor R4 is connected to the base of the second NPN triode Q2, the fourth resistor R4 is a resistor for limiting current to the second NPN triode Q2, when the first NPN triode Q1 in the hall element sensing circuit 32 is turned on, the voltage at the connection point of the fourth resistor R4 conforms to the conduction condition of the second NPN triode Q2, the second NPN triode Q2 is turned on, and output is achieved through the output terminal of the magnetic switching circuit.

Example 6:

Further, the wiring board 3 further includes:

In this embodiment, the circuit board 3 further includes a second resistor R2, where a second end of the second resistor R2 is connected to the output pin VOUT of the hall element U2, and the second resistor R2 is a pull-up resistor, and provides a bias at a high potential.

The embodiments of the present application and the features of the embodiments may be combined without conflict, and the present application is not limited to the specific embodiments described above, which are merely illustrative, not restrictive, and many forms may be made by those of ordinary skill in the art, without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A magnetic switch, comprising:

a housing for protecting the magnetic switch;

the wire is used for connecting an external load through the magnetic switch;

2. The magnetic switch of claim 1, wherein the voltage stabilizing circuit further comprises:

3. The magnetic switch of claim 1, wherein the hall element sensing circuit further comprises:

4. A magnetic switch according to claim 3, wherein the hall element sensing circuit further comprises:

5. The magnetic switch of claim 4, wherein the execution circuit further comprises:

6. The magnetic switch of claim 5, wherein the circuit board further comprises: