Magnetic latching relay

Abstract

The utility model belongs to the technical field of relays, and relates to a magnetic latching relay, which comprises a base body, a coil, an iron core, a contact system, a spring and permanent magnetic steel, the coil, the iron core, the contact system, the spring and the permanent magnetic steel are arranged in the base body, the contact system is provided with a control circuit, two terminals of the coil are respectively connected to an anode and a cathode of a power supply, and the coil is used for generating a magnetic field when being electrified; the iron core is arranged in the coil and is magnetized through a magnetic field generated by the coil, the contact system is connected to the iron core through the spring and moves under the action of the magnetic field to realize connection or disconnection of the magnetic latching relay, the permanent magnet steel is fixedly arranged in the base body, and the permanent magnet steel is arranged in the base body. And the control circuit is used for keeping the stable state of the contact system and controlling the magnetic latching relay. The system is small in size, low in power consumption, high in response speed, high in reliability, weak in interference and wide in application range.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and more specifically, to a magnetic latching relay. Background Technology

[0002] A magnetic latching relay is a type of relay that maintains a switched state. It works by using the attraction of a magnet to keep the relay in a closed state until an external signal causes it to open. Therefore, magnetic latching relays are widely used in control circuits.

[0003] Due to the unique nature of their internal structure and operating principle, magnetic latching relays are typically large in size, making them unsuitable for miniaturized or compact devices. This size limitation restricts the application of magnetic latching relays in fields such as integrated circuits and miniaturized devices.

[0004] During operation, magnetic latching relays consume electrical energy, especially during their engagement and disengagement processes, where power consumption is even higher. This not only increases the energy consumption of the equipment but also hinders energy conservation and environmental protection. Utility Model Content

[0005] To address the aforementioned deficiencies in the prior art, this utility model provides a magnetic latching relay, comprising:

[0006] The system comprises a base, a coil, an iron core, a contact system, a spring, and a permanent magnet, all housed within the base. The contact system includes a control circuit. The two terminals of the coil are connected to the positive and negative terminals of a power source, respectively, and the coil generates a magnetic field when energized. The iron core is placed inside the coil and is magnetized by the magnetic field generated by the coil. The contact system is connected to the iron core via the spring and moves under the influence of the magnetic field, thus enabling the magnetic latching relay to connect or disconnect. The permanent magnet is fixed inside the base to maintain the stability of the contact system. The control circuit controls the magnetic latching relay.

[0007] Preferably, the coil is made of enameled wire.

[0008] Preferably, the iron core is made of silicon steel sheet or permalloy.

[0009] Preferably, the contact system is made of silver alloy or copper alloy material.

[0010] Preferably, the control circuit includes a control module, a power supply adjustment module, and a drive circuit. The control module is connected to the power supply adjustment module and is used to receive power supply drive signals and generate switch control signals. The control module is also connected to the drive circuit and transmits the switch control signals to the drive circuit. The drive circuit is connected to the coil and is used to apply pulse signals to the coil to drive the coil to operate.

[0011] Preferably, the control module includes a microcontroller.

[0012] Preferably, the power supply regulation module includes: a regulated power supply and a filter circuit.

[0013] Preferably, the driving circuit includes a resistor R1 and a transistor Q1, with one end of the resistor R1 connected to the gate of the transistor Q1.

[0014] Preferably, the magnetic latching relay further includes a temperature control module.

[0015] Preferably, the magnetic latching relay further includes a humidity control module.

[0016] The magnetic latching relay of this invention has the following beneficial effects:

[0017] Firstly, it is small in size: it is not only easy to install, but also suitable for occasions with limited space;

[0018] Secondly, it has low power consumption: permanent magnets only consume energy during state transitions, which can greatly reduce power consumption and help save energy.

[0019] Third, it has a fast response speed: it can quickly switch the switching state to ensure the normal operation of the circuit;

[0020] Fourth, it has high reliability: it uses permanent magnets to maintain its state and does not rely on electromagnets for suspension, thus ensuring its high reliability.

[0021] Fifth, it is less susceptible to interference: it is not easily affected by magnetic field interference, which can ensure the stability and reliability of the circuit.

[0022] Sixth, it has a wide range of applications, such as machine tool automation, packaging machinery and railway signal control. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. The utility model will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0024] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the magnetic latching relay of this utility model;

[0025] Figure 2 This is a sectional view of side BB of an embodiment of the magnetic latching relay of this utility model;

[0026] Figure 3 This is a left view of an embodiment of the magnetic latching relay of this utility model;

[0027] Figure 4 This is a right view of an embodiment of the magnetic latching relay of this utility model;

[0028] Figure 5 This is a top view of an embodiment of the magnetic latching relay of this utility model;

[0029] Figure 6 This is a cross-sectional view of an embodiment of the magnetic latching relay of this utility model.

[0030] In the diagram, 1-base, 2-coil, 3-iron core, 4-contact system, 5-spring, 6-permanent magnet. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the magnetic latching relay of this utility model; Figure 2 This is a sectional view of side BB of an embodiment of the magnetic latching relay of this utility model; Figure 3 This is a left view of an embodiment of the magnetic latching relay of this utility model; Figure 4 This is a right view of an embodiment of the magnetic latching relay of this utility model; Figure 5 This is a top view of an embodiment of the magnetic latching relay of this utility model; Figure 6 This is a cross-sectional view of one embodiment of the magnetic latching relay of this utility model. Please refer to... Figures 1-6 The magnetic latching relay provided in the first embodiment of this utility model includes at least a base 1, a coil 2, an iron core 3, a contact system 4, a spring 5, and a permanent magnet 6 disposed within the base 1. The contact system 4 is provided with a control circuit. The two terminals of the coil 2 are respectively connected to the positive and negative terminals of the power supply. The coil 2 is used to generate a magnetic field when energized. The iron core 3 is placed inside the coil 2 and is magnetized by the magnetic field generated by the coil 2. The contact system 4 is connected to the iron core 3 by the spring 5 and moves under the action of the magnetic field to realize the connection or disconnection of the magnetic latching relay. The permanent magnet 6 is fixedly disposed inside the base 1 to maintain the stable state of the contact system 4. The control circuit is used to control the magnetic latching relay.

[0035] The coil is made of enameled wire and has good insulation and electromagnetic properties. The coil is the key component for generating a magnetic field. When the coil is energized, it generates a magnetic field, which attracts the iron core and magnetizes it.

[0036] The iron core is made of a high-permeability magnetic material, such as silicon steel sheets or permalloy. Under the influence of a magnetic field, the iron core becomes magnetized and generates a magnetic field. This magnetic field exerts a force on the contact system, causing the contact system to move.

[0037] The contact system is a key component of the magnetic latching relay, including the moving contact, stationary contact, and contact spring. The contact system is made of materials with good conductivity, such as silver alloy or copper alloy. When the magnetic field force is sufficiently large, the contact system overcomes the spring force, the contacts close, and the magnetic latching relay is activated. When the external force exceeds the force of the magnetic field inside the iron core, the contact system overcomes the magnetic force, the contacts open, and the magnetic latching relay is deactivated.

[0038] Permanent magnets are the key component for realizing the holding function of magnetic latching relays. Permanent magnets can be made of ferrite or neodymium iron boron materials, possessing high magnetic energy product and low demagnetization rate. The magnetic force of the permanent magnet maintains the stable state of the contact system until it is triggered by a pulse current of opposite polarity, changing its state.

[0039] When the coil is energized, it generates a magnetic field. This magnetic field passes through the iron core, magnetizing it. After magnetization, the iron core generates its own magnetic field, which exerts a force on the contact system, causing it to move. When the magnetic force is sufficiently strong, the contact system overcomes the spring force, the contacts close, and the circuit is connected. When the coil is de-energized, the coil's magnetic field disappears, but due to the hysteresis characteristic of the iron core, the internal magnetic field remains, keeping the contacts closed. To open the contacts, an external force, such as spring force or electromagnetic force, needs to be applied. When the external force exceeds the force of the internal magnetic field of the iron core, the contact system overcomes the magnetic force, the contacts open, and the magnetic latching relay of this invention disconnects.

[0040] The unique feature of a magnetic latching relay is that its switching state (i.e., the closing or opening of the contacts) is not maintained by a continuous current, but rather by the magnetic force of a permanent magnet. When a brief pulse of current is applied to the coil, the internal magnetic system of the relay changes, thus switching the state of the contacts. Once the state switch is complete, the relay remains in the new switching state even if the current in the coil disappears, until it is triggered again by a pulse of current of opposite polarity to change the state.

[0041] In a specific implementation, the control circuit may also include a control module, a power supply regulation module, and a drive circuit. The control module is connected to the power supply regulation module and is used to receive power supply drive signals and generate switch control signals. The control module is connected to the drive circuit and transmits the switch control signals to the drive circuit. The drive circuit is connected to the coil and is used to apply pulse signals to the coil to drive the coil to operate.

[0042] The control module includes a microcontroller. The microcontroller can be a single-chip microcomputer, PLC, AT89C52, or other control devices. This embodiment uses the AT89C52.

[0043] The microcontroller is the core of the control module. It is responsible for processing input signals, generating control signals, and can set input / output interface circuits according to actual needs to communicate with external circuits.

[0044] Input / output interface circuits are used to connect the input / output ports of the microcontroller to external circuits, including output ports for control signals and input ports for power supply and drive signals.

[0045] The microcontroller's P1.0 and P1.1 ports are used to output control signals, which are connected to the coil of the magnetic latching relay via a drive circuit. The power supply drive signal output from the power supply regulation module is connected to the corresponding input port of the microcontroller.

[0046] The control module works as follows: When the power supply drive signal output by the power supply regulation module acts on the microcontroller, the microcontroller generates a switch control signal according to the terminal's demand instruction. By controlling the level states of ports P1.0 and P1.1, it outputs corresponding pulse signals to drive the coil of the magnetic latching relay.

[0047] The power supply regulation module provides a stable power drive signal to control the operation of the control module. In specific implementations, the power supply regulation module includes a regulated power supply and a filter circuit. The regulated power supply stabilizes the input voltage to a certain output voltage to ensure stable circuit operation. The filter circuit removes ripple and noise from the supply voltage, improving power quality.

[0048] The input of the regulated power supply is connected to an external power source, and the output is connected to the input of the filter circuit. The output of the filter circuit is connected to the power input port of the control module.

[0049] The power supply regulation module works by stabilizing the input voltage to a certain output voltage through a regulated power supply and filtering out ripple and noise through a filtering circuit. A stable power supply drive signal is then output to the power input port of the control module, providing a stable operating power supply for the control module.

[0050] The drive circuit converts the switching control signal output from the control module into a pulse signal and applies it to the coil of the magnetic latching relay to drive the coil to operate. In a specific implementation, the drive circuit includes a resistor R1 and a transistor Q1, with one end of the resistor R1 connected to the gate of the transistor Q1. The resistor R1 is used for current limiting and voltage division to protect the components in the circuit. The transistor Q1 amplifies the control signal to drive the electromagnetic coil.

[0051] The driving circuit works as follows: When the switch control signal output by the control module is high, the corresponding transistor conducts, and current flows through the resistor and transistor into the electromagnetic coil, generating a magnetic field. This magnetic field attracts the armature to the contact point, thus connecting the circuit. When the switch control signal is low, the corresponding transistor is cut off, the current in the electromagnetic coil disappears, and the magnetic field disappears. Due to the action of the permanent magnet, the armature remains on the contact point, and the circuit remains connected. When it is necessary to disconnect the circuit, the control module outputs a reverse switch control signal, causing the corresponding transistor to conduct, generating a reverse magnetic field that repels the armature from the contact point, thus disconnecting the circuit.

[0052] In a specific implementation, the magnetic latching relay of this embodiment may further include a temperature control module. The temperature control module may include a temperature sensor. The temperature sensor is used to acquire the temperature signal of the environment or the controlled target in real time. The temperature sensor can be a thermocouple, a thermistor, or an infrared temperature sensor, etc. The control module receives the signal from the temperature sensor, compares and calculates it according to preset target temperature parameters, and generates a control signal. Based on the control signal, the magnetic latching relay of this embodiment controls the temperature of the controlled target. The temperature sensor continuously monitors the temperature and feeds back the monitoring results to the control module to achieve closed-loop control.

[0053] In a specific implementation, the magnetic latching relay in this embodiment may also include a humidity control module. Similar to the temperature control module, the humidity control module includes a humidity sensor. The humidity sensor is used to collect humidity signals from the environment or the controlled target in real time. The humidity sensor can be a capacitive humidity sensor, a resistive humidity sensor, etc.

[0054] The control module receives signals from the humidity sensor, compares and calculates them based on preset target humidity parameters, and generates control signals.

[0055] The control module compares the current humidity with the target humidity and calculates the control quantity according to the set control algorithm. The control module outputs the control signal to the magnetic latching relay of this invention to control its on / off state to regulate the humidity.

[0056] The humidity sensor continuously monitors the humidity and feeds the monitoring results back to the control module to achieve closed-loop control.

[0057] The application scenarios for the magnetic latching relay of this utility model include:

[0058] Firstly, machine tool automation: In the machine tool automation control system, magnetic latching relays are needed to control various relative positions of machining units, such as drills, drilling, milling, etc., so as to automate the machining process and improve production efficiency.

[0059] Secondly, packaging machinery: In the control system of packaging machinery, magnetic latching relays are needed to control equipment such as servo motors and stepper motors, so that they can maintain their motion state, avoid discontinuous movement of the machinery, and ensure accuracy and stability.

[0060] Thirdly, railway signal control: In the railway signal control system, magnetic latching relays are needed to control the color lights of the signals to ensure that trains can travel along the prescribed routes and avoid traffic accidents.

[0061] The beneficial effects of this utility model, through the design of the above embodiments, are as follows:

[0062] Firstly, it is small in size: it is not only easy to install, but also suitable for occasions with limited space;

[0063] Secondly, it has low power consumption: permanent magnets only consume energy during state transitions, which can greatly reduce power consumption and help save energy.

[0064] Third, it has a fast response speed: it can quickly switch the switching state to ensure the normal operation of the circuit;

[0065] Fourth, it has high reliability: it uses permanent magnets to maintain its state and does not rely on electromagnets for suspension, thus ensuring its high reliability.

[0066] Fifth, it is less susceptible to interference: it is not easily affected by magnetic field interference, which can ensure the stability and reliability of the circuit.

[0067] Sixth, it has a wide range of applications, such as machine tool automation, packaging machinery and railway signal control.

[0068] This utility model has been described based on specific embodiments, but those skilled in the art will understand that various changes and equivalent substitutions can be made without departing from the scope of this utility model. Furthermore, to adapt to specific applications of this utility model, numerous modifications can be made without departing from its protection scope. Therefore, this utility model is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the protection scope of the claims.

Claims

1. A magnetic latching relay, characterized in that, include: The system comprises a base, a coil, an iron core, a contact system, a spring, and a permanent magnet, all housed within the base. The contact system includes a control circuit. The two terminals of the coil are connected to the positive and negative terminals of a power source, respectively, and the coil generates a magnetic field when energized. The iron core is placed inside the coil and is magnetized by the magnetic field generated by the coil. The contact system is connected to the iron core via the spring and moves under the influence of the magnetic field, thus enabling the magnetic latching relay to connect or disconnect. The permanent magnet is fixed inside the base to maintain the stability of the contact system. The control circuit controls the magnetic latching relay.

2. The magnetic latching relay according to claim 1, characterized in that, The coil is made by winding enameled wire.

3. The magnetic latching relay according to claim 1, characterized in that, The iron core is made of silicon steel sheets or permalloy.

4. The magnetic latching relay according to claim 1, characterized in that, The contact system is made of silver alloy or copper alloy.

5. The magnetic latching relay according to any one of claims 1 to 4, characterized in that, The control circuit includes a control module, a power supply regulation module, and a drive circuit. The control module is connected to the power supply regulation module and is used to receive power supply drive signals and generate switch control signals. The control module is also connected to the drive circuit and transmits the switch control signals to the drive circuit. The driving circuit is connected to the coil and is used to apply pulse signals to the coil to drive the coil to move.

6. The magnetic latching relay according to claim 5, characterized in that, The control module includes a microcontroller.

7. The magnetic latching relay according to claim 5, characterized in that, The power supply regulation module includes: a regulated power supply and a filter circuit.

8. The magnetic latching relay according to claim 5, characterized in that, The driving circuit includes a resistor R1 and a transistor Q1, with one end of the resistor R1 connected to the gate of the transistor Q1.

9. The magnetic latching relay according to claim 5, characterized in that, The magnetic latching relay also includes a temperature control module.

10. The magnetic latching relay according to claim 5, characterized in that, The magnetic latching relay also includes a humidity control module.

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