Magnetic induction travel switch and vacuum equipment using same

Abstract

The utility model discloses a magnetic induction travel switch and a vacuum device using the same, and relates to the travel switch field, the magnetic induction travel switch comprises a switch housing, one side of the top end of the switch housing is connected with a driver, one side of the switch housing is provided with a conduit port, one end of the conduit port is connected with an insulation protection sleeve, and the other end of the conduit port is provided with an insulation protection sleeve. In actual operation, when the wire is pulled by external force, the spring between the fixing ring and the inner wall of the switch shell is extruded, the fixing ring is blocked by the switch shell, the wire is prevented from being pulled out continuously, and meanwhile, the first magnet and the second magnet in the insulating protective sleeve are close to each other, so that the wire is prevented from being pulled out continuously. The expulsive force between the first magnet and the second magnet and the elastic force of the spring can buffer the external pulling force, and when the external pulling force disappears, the expulsive force and the elastic force of the spring can enable the wire to return to the initial position, so that the wire is protected.

Description

Technical Field

[0001] The utility model relates to the field of travel switches, in particular to a magnetic induction travel switch and vacuum equipment using the switch. Background Art

[0002] A travel switch is a type of position switch (also known as a limit switch). It is a commonly used low-current master electrical appliance that uses the collision of mechanical moving parts to move its contacts to connect or disconnect the control circuit to achieve a certain control purpose.

[0003] The limit switch generally requires wires and cables to connect to the controller. The connection distance of the wires is generally long, and their own weight will cause them to sink. When in use, the overall length of the wires cannot be fixed. Therefore, the connection of the wires is affected by the sinking force, causing them to bend and break.

[0004] Therefore, it is necessary to propose a magnetic induction travel switch and a vacuum device using the switch to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a magnetic induction travel switch and a vacuum device using the switch, so as to solve the problem that the travel switch generally needs wires and cables to be connected to the controller, and the connection distance of the wires is generally long, and coupled with their own weight, they will sink. When in use, the overall length of the wires cannot be fixed, so the connection of the wires is affected by the sinking force, resulting in bending and breaking.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a magnetic induction travel switch, comprising a switch housing, a transmission device is connected to one side of the top of the switch housing, a conduit port is opened on one side of the switch housing, one end of the conduit port is connected to an insulating protective sleeve, a wire is sleeved inside the insulating protective sleeve, one end of the wire passes through the conduit port and is connected to a circuit board inside the switch housing, the insulating protective sleeve is arranged in a cone shape, and the radius of the end of the cone structure close to the switch housing is greater than the radius of the end away from the switch housing, a plurality of protruding shells are arranged at the end of the insulating protective sleeve away from the insulating protective sleeve, the plurality of protruding shells are in contact with the outside of the wire, and the plurality of protruding shells are filled with insulating glue.

[0007] Preferably, a fixing ring is fixedly connected to the outer side of the extending end of the wire, and a spring is connected between the fixing ring and the inner wall of the switch housing.

[0008] Preferably, a second magnet is fixed on the outside of the wire, a first magnet is arranged on the side of the second magnet away from the switch housing, a distance is left between the first magnet and the second magnet, and the first magnet is fixed on the inner wall of the insulating protective cover, and the first magnet and the second magnet repel each other.

[0009] Preferably, a silicone gasket is fixedly connected to one end of the insulating protective sleeve away from the switch housing, and the silicone gasket is sleeved on the outside of the wire.

[0010] Preferably, a magnetic induction generator is provided on one side of the switch housing close to the actuator, and the magnetic induction generator is connected to a circuit board via wires.

[0011] The utility model also discloses a vacuum device, including a vacuum sealer, wherein a travel switch is installed on the side of the sealer, the travel switch is connected to a controller through a wire or a cable, and when the vacuum sealer is running, the actuator feeds back to the controller through a travel switch signal.

[0012] Technical effects and advantages of the utility model:

[0013] 1. In the actual operation of the utility model, when the wire is pulled by external force, the spring between the fixing ring and the inner wall of the switch housing is squeezed, and the fixing ring will be blocked by the switch housing to prevent the wire from being continuously pulled out. At the same time, the first magnet and the second magnet inside the insulating protective cover will also approach each other. The repulsive force between the first magnet and the second magnet and the elastic force of the spring can buffer the external pulling force. When the external pulling force disappears, the repulsive force and the elastic force of the spring can make the wire return to its initial position, thereby protecting the wire and preventing the connection between the wire and the circuit board from being torn off.

[0014] 2. When the outer side of the wire and the tapered end of the insulating protective cover are bent, multiple protruding shells contact the wire to prevent the distance from being too close, which causes the tapered inner ring to cut and scratch the outer side of the wire. At the same time, when the external force is too large, the wire will squeeze the protruding shell, causing the insulating glue inside the protruding shell to leak out and bond the outer side of the wire to improve the insulation effect. Furthermore, when the wire moves back and forth inside the insulating protective cover, the tapered structure and the setting of the silicone gasket can wipe the dust on the outside of the wire to prevent dust from entering. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a structural schematic diagram of a magnetic induction travel switch of the utility model from one perspective.

[0016] Figure 2 This is a schematic structural diagram of the magnetic induction travel switch of the utility model from another perspective.

[0017] Figure 3 For this utility model Figure 2 Enlarged schematic diagram at point A in the middle.

[0018] In the figure: 1. switch housing; 2. actuator; 3. insulating protective cover; 4. wire; 5. magnetic induction generator; 6. silicone gasket; 7. protruding shell; 8. spring; 9. first magnet; 10. second magnet; 11. fixing ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clarify the technical solutions in the embodiments of the utility model; it is completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model provides Figure 1 - Figure 3 The magnetic induction travel switch shown in the figure comprises a switch housing 1, a transmission device 2 is connected to one side of the top of the switch housing 1, a conduit port is opened on one side of the switch housing 1, an insulating protective sleeve 3 is connected to one end of the conduit port, a wire 4 is sleeved inside the insulating protective sleeve 3, one end of the wire 4 passes through the conduit port and is connected to the circuit board inside the switch housing 1, the travel switch is a prior art, and the internal structure of the switch housing 1 is not described in detail. A 1.5 cm length is reserved at one end of the wire 4 extending into the switch housing 1 for external force pulling.

[0021] The insulating protective sleeve 3 is set to be conical, and the radius of the end of the conical structure close to the switch housing 1 is larger than the radius of the end away from the switch housing 1. The end of the insulating protective sleeve 3 away from the insulating protective sleeve 3 is provided with multiple protruding shells 7, and the multiple protruding shells 7 are against the outside of the wire 4. The multiple protruding shells 7 are filled with insulating glue. A fixing ring 11 is fixed to the outside of the inserted end of the wire 4, and a spring 8 is connected between the fixing ring 11 and the inner wall of the switch housing 1.

[0022] A silicone gasket 6 is fixedly connected to one end of the insulating protective cover 3 away from the switch housing 1. The silicone gasket 6 is sleeved on the outside of the wire 4. A second magnet 10 is fixed to the outside of the wire 4. A first magnet 9 is arranged on the side of the second magnet 10 away from the switch housing 1. A distance is left between the first magnet 9 and the second magnet 10, and the first magnet 9 is fixed on the inner wall of the insulating protective cover 3. The first magnet 9 and the second magnet 10 repel each other.

[0023] In the actual operation of the utility model, when the wire 4 is pulled by external force, the spring 8 between the fixing ring 11 and the inner wall of the switch housing 1 is squeezed, and the fixing ring 11 will be blocked by the switch housing 1 to prevent the wire 4 from being continuously pulled out. At the same time, the first magnet 9 and the second magnet 10 inside the insulating protective cover 3 will also approach each other. The repulsive force between the first magnet 9 and the second magnet 10 and the elastic force of the spring 8 can buffer the external pulling force. When the external pulling force disappears, the repulsive force and the elastic force of the spring 8 can make the wire 4 return to its initial position, thereby protecting the wire 4 and preventing the connection between the wire 4 and the circuit board from being torn off.

[0024] When the outer side of the wire 4 and the tapered end of the insulating protective sleeve 3 are bent, the multiple protruding shells 7 contact the wire 4 to prevent the distance from being too close, which would cause the tapered inner ring to cut and scratch the outer side of the wire 4. At the same time, when the external force is too large, the wire 4 will squeeze the protruding shell 7, causing the insulating glue inside the protruding shell 7 to leak out and bond the outer side of the wire 4 to improve the insulation effect.

[0025] Furthermore, when the wire 4 moves back and forth inside the insulating protective cover 3, the conical structure and the setting of the silicone gasket 6 can wipe the dust on the outside of the wire 4 to prevent the entry of dust.

[0026] A magnetic induction generator 5 is disposed on one side of the switch housing 1 close to the actuator 2 , and the magnetic induction generator 5 is connected to the circuit board through wires.

[0027] The utility model also discloses a vacuum device, which also includes a vacuum sealer. The magnetic induction travel switch is installed on the side of the sealer. The magnetic induction travel switch is connected to the controller through a wire or a cable. When the vacuum sealer is running, the actuator feeds back to the controller through the travel switch signal.

[0028] By additionally connecting a magnetic induction generator 5 to the switch housing 1, when the moving part passes through the magnetic induction generator 5, it is induced to generate a voltage (current) which is input to a controller (such as a PLC), and the signal is transmitted to the circuit board, which then transmits the signal to the controller. When the actuator 2 is damaged, the magnetic induction generator 5 can be used for switch control without affecting the use of the overall device.

Claims

1. A magnetic induction travel switch, comprising a switch housing (1), characterized in that: A transmission device (2) is connected to one side of the top of the switch housing (1); a conduit port is provided on one side of the switch housing (1); one end of the conduit port is connected to an insulating protective sleeve (3); a wire (4) is sleeved inside the insulating protective sleeve (3); one end of the wire (4) passes through the conduit port and is connected to a circuit board inside the switch housing (1); the insulating protective sleeve (3) is arranged in a conical shape, and the radius of the end of the conical structure close to the switch housing (1) is greater than the radius of the end away from the switch housing (1); a plurality of protruding shells (7) are arranged inside the insulating protective sleeve (3) at the end away from the insulating protective sleeve (3); the plurality of protruding shells (7) abut against the outside of the wire (4); and the plurality of protruding shells (7) are filled with insulating glue.

2. A magnetic induction travel switch according to claim 1, characterized in that: A fixing ring (11) is fixedly connected to the outer side of the insertion end of the wire (4), and a spring (8) is connected between the fixing ring (11) and the inner wall of the switch housing (1).

3. A magnetic induction travel switch according to claim 1, characterized in that: A second magnet (10) is fixed on the outer side of the wire (4); a first magnet (9) is arranged on the side of the second magnet (10) away from the switch housing (1); a distance is left between the first magnet (9) and the second magnet (10); the first magnet (9) is fixed on the inner wall of the insulating protective cover (3); and the first magnet (9) and the second magnet (10) repel each other.

4. A magnetic induction travel switch according to claim 1, characterized in that: One end of the insulating protective sleeve (3) away from the switch housing (1) is fixedly connected to a silicone gasket (6), and the silicone gasket (6) is sleeved on the outside of the wire (4).

5. The magnetic induction travel switch according to claim 1, characterized in that: A magnetic induction generator (5) is provided on one side of the switch housing (1) close to the actuator (2), and the magnetic induction generator (5) is connected to a circuit board via an electric wire.

6. A vacuum device, characterized in that: It includes the magnetic induction travel switch as described in any one of claims 1-5, and also includes a vacuum sealing machine, the magnetic induction travel switch is installed on the side of the sealing machine, the magnetic induction travel switch is connected to the controller through a wire or cable, and when the vacuum sealing machine is running, the actuator feeds back to the controller through the travel switch signal.

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