A contactor

Abstract

The utility model discloses a contactor, including casing, main contact, reset spring, armature and electromagnet, the electromagnet is two, is located the left and right sides of armature respectively, the top of armature is equipped with first boss, one side of first boss is equipped with the slope extending to top end face, the bottom of mobile part is equipped with second boss, one side of second boss is equipped with the slope extending to bottom end face, the slope of first boss and the slope of second boss are opposite and are located. The utility model need not for coil continuous energization to make main contact keep closed state, is more energy -conserving.

Description

Technical Field

[0001] This utility model mainly relates to the field of contactors. Background Technology

[0002] A contactor is a widely used switching device. It utilizes the magnetic field generated when the coil of an electromagnet is energized. This magnetic field attracts an armature, causing the main contacts to actuate and close, thus controlling the load. A traditional contactor uses only one electromagnet, located below the armature. When the electromagnet's coil is energized, it attracts the armature, causing it to descend and close the main contacts. To maintain continuous closure of the main contacts, the electromagnet's coil must be continuously energized. This is typically achieved through a self-locking circuit, where the normally open contact of the start button is connected in parallel with the contactor's auxiliary normally open contact. When the start button is pressed, the coil is energized, and both the main and auxiliary normally open contacts close simultaneously. Releasing the start button allows the control circuit, energized by the auxiliary normally open contact, to continuously supply power to the coil, creating a self-locking mechanism. Pressing the stop button de-energizes the coil, and both the main and auxiliary normally open contacts open simultaneously. In the control circuit of a traditional contactor, the start button is a normally open self-resetting jog switch, and the stop button is a normally closed self-resetting electric switch.

[0003] Traditional contactors have the following drawbacks: the coil of the electromagnet needs to be continuously energized to maintain the attraction force on the armature in order to keep the main contacts closed, which wastes electrical energy. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a contactor that saves energy by keeping the main contacts closed without continuously energizing the coil, in order to address the shortcomings of the existing technology.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A contactor includes a main contact, a return spring, an armature, and an electromagnet. The main contact includes a fixed contact and a movable contact. The fixed contact is fixed to the contactor housing, and the movable contact is fixed to a movable component that can move up and down. There are two electromagnets, located on the left and right sides of the armature, respectively. The top of the armature is provided with a first boss, and one side of the first boss is provided with an inclined surface extending to the top surface. The bottom of the movable component is provided with a second boss, and one side of the second boss is provided with an inclined surface extending to the bottom surface. The inclined surfaces of the first boss and the second boss are arranged opposite to each other. When the right electromagnet is energized and attracts the armature, the first and second protrusions move laterally away from each other. The moving part is in the lower limit position under the force of the return spring, and the moving contact of the main contact separates from the fixed contact. When the left electromagnet is energized and attracts the armature, it moves the first protrusion laterally toward the second protrusion. When the inclined surface of the first protrusion contacts the inclined surface of the second protrusion, it pushes the second protrusion to move upward along the inclined surface of the first protrusion until the second protrusion moves to the top surface of the first protrusion. At this time, the moving part is in the upper limit position, and the moving contact of the main contact closes with the fixed contact.

[0007] As a further improvement of this utility model, it also includes two micro switches, which are located on the left and right sides of the armature respectively. Each micro switch is connected to an indicator light. The armature is provided with a trigger. After the armature is attracted by the electromagnet, the trigger can just touch the micro switch on the same side as the electromagnet, so that the corresponding indicator light is lit.

[0008] As a further improvement of this utility model, the housing is provided with a limiting part for limiting the lower limit position of the moving part.

[0009] As a further improvement of this utility model, the reset spring is installed between the inner wall of the housing and the top of the moving part.

[0010] As a further improvement of this utility model, each electromagnet is connected to a normally open self-resetting jog switch in its control circuit.

[0011] Compared with the prior art, the advantages of this utility model are as follows: This utility model improves the internal structure of the contactor so that it can achieve self-locking through the mechanical cooperation of the first boss and the second boss. It can keep the main contacts closed without maintaining the coil continuously energized, thus saving more energy. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model in the open state of the main contact.

[0013] Figure 2 This is a schematic diagram of the structure of this utility model in the closed state of the main contact.

[0014] Figure 3 This is the circuit schematic diagram of this utility model.

[0015] Reference numerals: 1. Housing; 2. Main contact; 21. Fixed contact; 22. Movable contact; 3. Return spring; 4. Armature; 5. Electromagnet; 6. Moving part; 7. First boss; 8. Second boss; 9. Micro switch; 10. Trigger; 11. Limiting part. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the protection scope of the present invention is not limited to the following embodiments. Any improvements and modifications made to the present invention without departing from the principle of the present invention shall be considered within the protection scope of the present invention.

[0017] like Figure 1 , Figure 2 , Figure 3 As shown, the contactor of this utility model includes a housing 1, main contacts 2, a return spring 3, an armature 4, and electromagnets 5. The main contacts 2 include a fixed contact 21 and a movable contact 22. The fixed contact 21 is fixed to the housing 1, and the movable contact 22 is fixed to a movable component 6 that can move up and down. There are two electromagnets 5, located on the left and right sides of the armature 4, respectively. In use, the coil of each electromagnet 5 is connected to a normally open self-resetting jog switch in its control circuit. In this embodiment, the jog switch connected to the coil of the left electromagnet 5 is a start button SB1, used to control the main contacts 2 to close, and the jog switch connected to the coil of the right electromagnet 5 is a stop button SB2, used to control the main contacts 2 to open.

[0018] The armature 4 has a first boss 7 at its top. The first boss 7 is square, with a flat top surface and a slope extending to the top surface on one side. The moving part 6 has a second boss 8 at its bottom. The second boss 8 is square, with a flat bottom surface and a slope extending to the bottom surface on one side. The slopes of the first boss 7 and the second boss 8 are opposite to each other.

[0019] When in use, the contactor's control circuit follows... Figure 3 The wiring diagram is shown.

[0020] When the stop button SB2 is pressed, the coil of the right electromagnet 5 is energized, attracting the armature 4. The first boss 7 and the second boss 8 are laterally offset from each other. The moving part 6 is in the lower limit position under the action of the reset spring 3, and the movable contact 22 of the main contact 2 is separated from the fixed contact 21.

[0021] After the stop button SB2 is released, the coil of the right electromagnet 5 is de-energized, the armature 4 loses its attraction but remains stationary, the moving part 6 remains in the lower limit position under the force of the reset spring 3, and the main contact 2 remains open.

[0022] When the start button SB1 is pressed, the coil of the left electromagnet 5 is energized, attracting the armature 4 and causing the first boss 7 to move laterally toward the second boss 8. When the inclined surface of the first boss 7 contacts the inclined surface of the second boss 8, it pushes the second boss 8 to move upward along the inclined surface of the first boss 7 until the second boss 8 moves to the top surface of the first boss 7. At this time, the moving part 6 is in the upper limit position, the return spring 3 is compressed, and the movable contact 22 of the main contact 2 contacts and closes with the fixed contact 21.

[0023] After the start button SB1 is released, the coil of the left electromagnet 5 is de-energized, the armature 4 loses its attraction but remains stationary, and the second boss 8 remains on the top surface of the first boss 7 under the support of the first boss 7, so that the moving part 6 is kept in the upper limit position and the main contact 2 remains closed.

[0024] The contactor of this utility model achieves self-locking through the mechanical cooperation of the first boss 7 and the second boss 8, which can keep the main contact 2 in a closed state without maintaining the coil continuously energized, thus saving more energy.

[0025] Preferably, the device also includes two microswitches 9, located on the left and right sides of the armature 4, respectively. Each microswitch 9 is connected to an indicator light. The armature 4 is equipped with a trigger 10. When the armature 4 is attracted by the electromagnet 5, the trigger 10 can just touch the microswitch 9 on the same side as the electromagnet 5, causing the corresponding indicator light to illuminate. The indicator light can be used to indicate the closed or open state of the closure device.

[0026] Preferably, the housing 1 is provided with a limiting part 11 for limiting the lower limit position of the moving part 6.

[0027] Preferably, the return spring 3 is installed between the inner wall of the housing 1 and the top of the moving part 6.

Claims

1. A contactor, comprising a housing, main contacts, a return spring, an armature, and an electromagnet, wherein the main contacts include a fixed contact and a movable contact, the fixed contact being fixed to the housing, and the movable contact being fixed to a vertically movable component, characterized in that: Two electromagnets are located on the left and right sides of the armature, respectively. The top of the armature has a first protrusion, and one side of the first protrusion has a slope extending to the top surface. The bottom of the moving part has a second protrusion, and one side of the second protrusion has a slope extending to the bottom surface. The slopes of the first and second protrusions are opposite to each other. When the right electromagnet is energized and attracts the armature, the first and second protrusions move laterally away from each other. The moving part is in the lower limit position under the force of the return spring, and the moving contact of the main contact separates from the fixed contact. When the left electromagnet is energized and attracts the armature, it moves laterally towards the second protrusion with the first protrusion. When the slope of the first protrusion contacts the slope of the second protrusion, it pushes the second protrusion upward along the slope of the first protrusion until the second protrusion moves to the top surface of the first protrusion. At this time, the moving part is in the upper limit position, and the moving contact of the main contact closes with the fixed contact.

2. The contactor according to claim 1, characterized in that: It also includes two microswitches, which are located on the left and right sides of the armature, respectively. Each microswitch is connected to an indicator light. The armature is equipped with a trigger. When the armature is attracted by the electromagnet, the trigger can just touch the microswitch on the same side as the electromagnet, so that the corresponding indicator light is lit.

3. The contactor according to claim 1 or 2, characterized in that: The housing is provided with a limiting part to limit the lower limit position of the moving part.

4. The contactor according to claim 1 or 2, characterized in that: The return spring is installed between the inner wall of the housing and the top of the moving part.

5. The contactor according to claim 1 or 2, characterized in that: In use, each electromagnet is connected to a normally open self-resetting jog switch in its control circuit.

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