A non-contact holding switch device
By designing a non-contact retention type switch device in industrial proximity switches, the detection of the direction of motion and the maintenance of the switching state is achieved by using permanent magnets and magnetic reeds, the problem of the inability to maintain the switching state in the prior art is solved, and the reliability and working life of the equipment are improved.
Patent Information
- Application Number
- CN202420763499.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-04-15
AI Technical Summary
Existing industrial proximity switches cannot maintain the switch state after the actuator reaches the specified position, and the loss of external magnetic drive when the actuator is away causes the switch state to be unable to be maintained.
A non-contact retaining switch device is designed, with the sensor built-in permanent magnets, and the actuator is placed with the magnetic poles facing the sensor. When the actuator passes through the inductor, the induction reed switch switches the state and remains in the state after the actuator leaves.
The detection of the direction of motion is realized, avoiding the problem of losing magnetic drive after the actuator is away from it and unable to maintain the switch state. Due to the non-contact design, the working life is long.
Smart Images
Figure CN222736142U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of proximity or limit detection sensor switches, in particular to a non-contact holding type switch device. Background Art
[0002] In the field of sensors such as industrial proximity switches, non-holding detection switches are usually used. When the actuator approaches, the switch is turned on, and when the actuator moves away, the switch is turned off. In some industrial application scenarios, such as elevators, a small switch is needed to detect the movement of the elevator. It can not only detect when it reaches the specified position, but also maintain the switch state after leaving in a fixed direction. Utility Model Content
[0003] The purpose of the utility model is to provide a non-contact holding type switch device to solve the above technical problems.
[0004] To achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A non-contact holding switch device comprises an inductor and an actuator. The inductor has a built-in permanent magnet, which is close to a reed switch and used to switch the reed switch state. The actuator is provided with a permanent magnet, with the magnetic pole facing the inductor.
[0006] The N pole or S pole of the actuator faces the sensor. When the actuator passes from one side, the inductive reed switch detects that the magnetic field reaches the closing threshold and turns on; when the actuator continues to pass the other side, the inductive reed switch turns off, and the switch state remains after the actuator leaves.
[0007] Compared with the prior art, the utility model has the following advantages: the utility model can detect the direction of movement, avoid the actuator being unable to maintain the switch state due to the loss of external magnetic drive, and has a long non-contact working life. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 This is a schematic diagram of the utility model with the N pole of the actuator facing the sensor (the actuator is in the initial position on one side).
[0009] Figure 2 This is the principle diagram of the N-pole orientation sensor of the actuator of the utility model (the actuator is in the initial position).
[0010] Figure 3 This is a schematic diagram of the actuator of the utility model with the S pole facing the sensor (the actuator is in the initial position on one side).
[0011] Figure 4 This is a schematic diagram of the actuator of the utility model with the S pole facing the sensor (the actuator is in the initial position on the other side). DETAILED DESCRIPTION
[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0013] A non-contact holding switch device comprises an inductor and an actuator. The inductor has a built-in permanent magnet, which is close to a reed switch and used to switch the reed switch state. The actuator is provided with a permanent magnet, with the magnetic pole facing the inductor.
[0014] The N pole or S pole of the actuator faces the sensor. When the actuator passes from one side, the inductive reed switch detects that the magnetic field reaches the closing threshold and turns on; when the actuator continues to pass the other side, the inductive reed switch turns off, and the switch state remains after the actuator leaves.
[0015] like Figure 1 As shown, the N pole of the actuator faces the sensor. When the actuator is in the initial position ③, the inductive reed switch detects that the magnetic field reaches the closing threshold and turns on. When the actuator continues to move to position ④, it is still in the on state. This is the boundary area and the state will be switched beyond this. When the actuator continues to move from position ④ to position ⑤, the external actuator magnetic field will offset the built-in magnetic field, so that the sensor is disconnected. Even after the actuator leaves, the switch state remains.
[0016] like Figure 2 As shown, the N pole of the actuator faces the sensor. When the actuator is in the initial position ③, the inductive reed switch detects that the magnetic field reaches the disconnection threshold and disconnects. When the actuator continues to move to position ④, it is still in the disconnected state. This is the boundary area, and the state will be switched beyond this. When the actuator continues to move from position ④ to position ⑤, the external actuator magnetic field will offset the built-in magnetic field, so that the sensor is turned on. Even after the actuator leaves, the switch state remains.
[0017] like Figure 3 As shown, the S pole of the actuator faces the sensor. When the actuator is in the initial position ③, the inductive reed switch detects that the magnetic field reaches the disconnection threshold and disconnects. When the actuator continues to move to position ④, it is still in the disconnected state. This is the boundary area, and the state will be switched beyond this. When the actuator continues to move from position ④ to position ⑤, the external actuator magnetic field will offset the built-in magnetic field, so that the sensor is turned on. Even after the actuator leaves, the switch state remains.
[0018] like Figure 4As shown, the S pole of the actuator faces the sensor. When the actuator is in the initial position ③, the inductive reed switch detects that the magnetic field reaches the closing threshold and turns on. When the actuator continues to move to position ④, it is still in the on state. This is the boundary area and the state will be switched beyond this. When the actuator continues to move from position ④ to position ⑤, the external actuator magnetic field will offset the built-in magnetic field, so that the sensor is disconnected. Even after the actuator leaves, the switch state remains.
[0019] The utility model can realize the detection of the movement direction, avoid the actuator being unable to maintain the switch state due to the actuator being far away and losing the external magnetic drive, and the non-contact working life is long.
[0020] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.
Claims
1. A non-contact holding switch device, characterized in that: It comprises a sensor and an actuator. The sensor has a built-in permanent magnet, which is close to a reed switch and is used to switch the reed switch state. The actuator is provided with a permanent magnet, with the magnetic pole facing the sensor.
2. A non-contact holding switch device as claimed in claim 1, characterized in that: The N pole or S pole of the actuator faces the sensor. When the actuator passes from one side, the inductive reed switch detects that the magnetic field reaches the closing threshold and turns on; when the actuator continues to pass the other side, the inductive reed switch turns off, and the switch state remains after the actuator leaves.