KR101163519B1 - Contact device having bi-directional latch mechanism - Google Patents

Abstract

PURPOSE: A contact device with bidirectional latch mechanism is provided to reduce power consumption by keeping a contact of a fixed contact and a movable contact through a permanent magnet when the power shut off. CONSTITUTION: A contact unit(110) includes a fixed contact(111), a movable contact(112), an upper resin housing(113) and a lower resin hosing(114). A pair of fixed contacts is electrically connected to a load side. The upper resin housing accepts the fixed contact and the movable contact. The lower resin housing insulates the lower side of the upper resin housing. A solenoid unit(120) includes a yoke plate(121), an excited coil(122), a fixed core(123) and a movable core(124).

Description

Contact device having bi-directional latch mechanism

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latching mechanism of a sealed high voltage high current contact device mainly used for a DC power source or a battery power source such as an electric vehicle, and more particularly, by using a magnetic field of an excitation coil and a polarity of a permanent magnet. The power consumption can be reduced by contacting the contactor with the movable contactor and maintaining the contact state between the fixed contactor and the movable contactor by the permanent magnet even when the power supplied to the coil is cut off. The present invention relates to a high voltage high current contact device having a bidirectional latch mechanism that can prevent heat generation in advance, thereby reducing battery consumption.

In general, a contact device such as a contactor used in a DC high voltage circuit such as an electric vehicle requires high reliability and low power consumption.

Contactor devices such as a contactor used in a conventional DC high voltage circuit include a fixed contactor and a movable contactor in the upper part to determine whether to conduct electricity, and a coil including a solenoid part for moving the movable contactor up and down in the lower part. It is composed.

Figure 1 shows a perspective view of a conventional high voltage high current contact device.

The conventional high voltage high current contact device as described above is provided with a resin housing 11 having an internal hollow to form an arc extinguishing space, a fixed contact 12 penetratingly coupled to the resin housing 11, and a resin housing. (11) The movable contact 13, which moves up and down and is in contact with and spaced apart from the fixed contact 12, is accommodated. In addition, a solenoid portion 14 in which a plurality of coils are wound is formed in the lower part of the resin housing 11 by moving the movable contact 13 in the vertical direction according to whether electromagnetic force is formed, and the resin housing 11 and An arc blocking portion 15 is formed between the solenoid portions 14 to hermetically block the resin housing 11, and they are configured to be accommodated in the metal can 16.

The contact device as described above has a magnetic field formed around the center of the coil wound when positive (+) power is applied to both ends of the coil constituting the solenoid part 14, thereby reducing the polarity of the N pole and the S pole. Will be visible. At this time, when the core of the electro-wrought iron rod is placed in the center of the coil, the core is caused to have the N pole and the S pole at both ends of the core by the magnetic field formed around the coil by the polarity of the magnetic field. It moves to the magnetic body of and attaches, and when a core is fixed, the magnetic body (amateur) is attracted and attached.

However, in the above configuration, the magnetic field must be continuously formed in the coil in order for the fixed contactor and the movable contactor of the contact device to keep in contact with each other. In this case, there is a problem in that power must be continuously applied to the coil.

In addition, in this process, the coil generates heat by the resistance value, and the generated heat is conducted to the surroundings, thereby raising the ambient temperature of the electronic device and the contact device, thereby causing burnout.

In addition, in a conventional contact device such as a contactor, the latch function is maintained when the fixed contactor and the movable contactor are in contact, but the latch function is not maintained after the fixed contactor and the movable contactor are separated from each other. There was a problem that the contact with the contactor occurs, it was also a cause of malfunction in the DC high voltage circuit, such as an electric vehicle (Electric Vehicle) applying this.

Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, the latch function is implemented both in the closed state in which the fixed contactor and the movable contactor are in contact, or in the open state in which the fixed contactor and the movable contactor are spaced apart from each other. This provides a bidirectional latch mechanism of a sealed high voltage high current contact device that prevents the movable contact from contacting the fixed contact and thereby eliminates the risk of malfunction of a DC high voltage circuit such as an electric vehicle. There is an object of the present invention.

As a technical means for achieving the above object, the present invention further forms a permanent magnet for the latch to the lower solenoid consisting of the excitation coil to form different magnetic paths according to the position of the movable contact, according to the fixed contact and A technique is devised to enable the latch function to be implemented both in contact with the movable contact or spaced apart.

According to the bidirectional latch mechanism of the contact device according to the present invention, it is possible to prevent the heating of the coil in advance because it is not necessary to continuously apply power to the coil for the latch function of the fixed contactor and the movable contactor, and accordingly various electronic devices and contacts There is an effect that can prevent damage to the device.

In addition, it is possible to reduce the battery consumption because it does not need to continuously apply power to the coil, it can also increase the fuel efficiency of the battery when applied to the electric vehicle has the effect of meeting the needs of consumers.

In addition, the latch function may be implemented both in a closed state in which the fixed contactor and the movable contactor are in contact, or in an open state in which the fixed contactor and the movable contactor are spaced apart from each other. The phenomenon that the movable contactor is in contact with the fixed contactor by the impact, etc. can be prevented, there is also an effect that can prevent the occurrence of malfunction in the DC high-voltage circuit, such as an electric vehicle to apply this.

1 is a perspective view of a conventional high voltage high current contact device.
2 is an exploded perspective view of a contact device having a bidirectional latch mechanism according to an embodiment of the present invention.
3 is an assembly cross-sectional view of a contact device having a bidirectional latch mechanism according to an embodiment of the present invention.
4 is a diagram illustrating a state of use of an ON state of a contact device having a bidirectional latch mechanism according to an embodiment of the present invention.
5 is a gyroscopic distribution diagram for the ON state of a contact device having a bidirectional latch mechanism according to an embodiment of the present invention.
6 is a diagram illustrating a state of use of an OFF state of a contact device having a bidirectional latch mechanism according to an embodiment of the present invention.
7 is a gyroscopic distribution diagram of the OFF state of a contact device having a bidirectional latch mechanism according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is an exploded perspective view of a contact device having a bidirectional latch mechanism according to an embodiment of the present invention, Figure 3 is an assembly cross-sectional view of the contact device having a bidirectional latch mechanism according to an embodiment of the present invention.

As described above, the contact device according to the present invention has a bidirectional latch mechanism, the configuration of which accommodates the fixed contact 111 and the movable contact 112, the fixed contact 111 and the movable contact 112 contact and The contact portion 110 configured to extinguish the arc generated during the separation operation, and formed in the lower portion of the contact portion 110 is configured to move the movable contact 112 in the vertical direction and the movable contact 112 ) Is configured to include a solenoid portion 120 to form a gyro when the position is located in one direction to achieve a latch function.

The contact portion 110 may include a pair of fixed contacts 111 electrically connected to the load side, a movable contact 112 for intermittent high current flow by contacting and separating the contact with the fixed contacts 111, and , Formed of a synthetic resin that is easy to manufacture with an insulating material and forms an arc extinguishing space therein, and a lower portion of the lower resin housing which insulates the open upper resin housing 113 and the open lower portion of the upper resin housing 113. (114), at least one arc absorbing permanent magnet (115) fixedly installed in the upper resin housing (113) to absorb arcs, and insulating shields provided at both inner side portions of the upper resin housing (113). And comprises a wall 116. At this time, a reducing gas such as nitrogen is filled in the inner space of the upper resin housing 113, and an intake and exhaust pipe 117 is further formed at the upper end of the upper resin housing 113 to fill the reducing gas after vacuum. The intake and exhaust pipe 117 is finished from the pipe cap 118, the upper resin housing 113, the upper end is molded from an epoxy compound to block the upper resin housing 113 hermetic.

In addition, the pair of fixed contacts 111 are installed to penetrate the upper resin housing 113, the movable contact 112 is spaced apart below the pair of fixed contacts 111, the The movable contact 112 is moved up and down by the driving of the solenoid part 120 to contact or spaced apart from the fixed contact 111.

In addition, the insulating blocking wall 116 installed on both inner side portions of the upper resin housing 113 may have an upper resin housing 113 from an arc generated when the fixed contact 111 and the movable contact 112 are contacted or spaced apart. In order to prevent the inner wall of the damage and damage is formed of an insulating material is preferably formed of a ceramic or glass material.

The solenoid part 120 has a yoke plate 121 disposed on a bottom surface of the lower resin housing 114 and a cylindrical bobbin disposed below the yoke plate 121 and having an inner center vertically penetrated therethrough. A plurality of coils are wound in the excitation coil part 122, the inner fixing hole 123 of the cylindrical through the inner center vertically to be fitted into the inner through hole of the excitation coil part 122, and the fixed core ( It is accommodated in the inner through-hole of the 123 and the sliding movement in the vertical direction, the movable core 124 to contact and spaced apart on the yoke plate 121 side when forming a magnetic circuit, the lower resin housing 114 and the yoke plate The movable core pin 125 is disposed to penetrate through the 121 and the upper part is connected to the movable contact 112 and the lower part is connected to the movable core 124, and the movable core 124 is spaced apart from the yoke plate 121. Elastic force to operate A return spring 126 to be generated, a latch permanent magnet 127 disposed at a lower portion of the excitation coil part 122, and at least two of which are spaced apart from each other, and a magnet disposed below the latch permanent magnet 127. The insulating plate 128 and the side portion of the excitation coil part 122 and the lower portion of the magnetic insulating plate 128 is formed in a 'b' shape and at least two or more are configured to include a yoke 129 is provided spaced apart from each other.

The yoke plate 121, the fixed core 123, the movable core 124, and the yoke 129 are made of metal so as to form a magnetic path by the latch permanent magnet 127.

The latch permanent magnet 127 is disposed in the lower portion of the excitation coil portion 122, and is arranged to contact while wrapping the circumference of the fixing core 123, a plurality of spaced apart from each other, a pair is spaced apart so as to face each other This is preferred.

The upper end of the yoke 129 is in contact with the yoke plate 121, and one end of the latch permanent magnet 127 is in contact with any one of the inner wall surfaces, and the bent lower surface is provided only when the movable core 124 is downward. There is contact between them.

The magnetic insulating plate 128 is installed between the latch permanent magnet 127 and the yoke 129 so that the latch permanent magnet 127 and the yoke 129 may be spaced apart from each other. It is to maintain the mutually spaced arrangement with respect to the installed permanent magnet for latch 127 and yoke 129, which is fixed through the fixing core 123 and the movable core 124 in the latch permanent magnet 127 When the magnetic path connected to the yoke 129 is formed, each closed circuit is configured so that a strong magnetic force is formed, thereby improving latch performance.

The configuration of the contact portion 110 and the solenoid portion 120 as described above is accommodated in the upper case is opened in the inner box 130, the upper part is molded from the epoxy compound, the inner box 130 is again the upper part of the outer box ( 140 after being accommodated inside the top is covered and blocked through the cover 150.

The contact device having the above configuration operates as follows.

4 and 5 are used state diagrams showing the ON state of the contact device having a bidirectional latch mechanism according to an embodiment of the present invention, Figure 4 shows the polarity formed in each component by the permanent magnet for the latch, Figure 5 Denotes the distribution of magnetic domains formed in each component part by the latch permanent magnet.

First, when (+) and (-) power are applied to the excitation coil part 122 for a short time (several tens of ms), the movable core 124 moves upward to come into contact with the yoke plate 121 and the excitation coil part A magnetic circuit is formed between the 122 and the yoke plate 121 and the yoke 129.

In this process, the movable core pin 125 integrally formed with the movable core 124 also moves upward, and the movable contact 112 connected to the upper end of the movable core pin 125 also moves upward, while the fixed contact 111 is moved. And energization by contact between the movable contact 112 is made.

In addition, in this process, a permanent magnet 127 for latching, a fixed core 123 and a movable core 124, and a yoke connecting the yoke plate 121 and the yoke 129 are formed. According to the formation of the magnetic path by 127, the movable core 124 is formed with a latch function to strongly maintain the contact state with the yoke plate 121 in the upwardly moved position.

6 and 7 are state diagrams showing the OFF state of the contact device having a bidirectional latch mechanism according to an embodiment of the present invention, Figure 6 shows the polarity formed in each component by the permanent magnet for the latch, Figure 7 Denotes a distribution of magnetic domains formed in each component part by the latch permanent magnet.

When the polarity applied to the excitation coil part 122 is reversed and the negative power is applied for a short time (several tens of ms), the movable core 124 moves downward to be spaced apart from the yoke plate 121. In this case, the elastic force of the return spring 126 applies a force so that the movable core 124 is easily spaced apart from the yoke plate 121 to move downward.

In this process, the movable core pin 125 formed integrally with the movable core 124 also moves downward, and the movable contact 112 connected to the upper end of the movable core pin 125 moves downward. And the movable contact 112 are spaced apart from each other so that the energized state is blocked.

In addition, in this process, a magnetic circuit connecting the latch permanent magnet 127, the fixed core 123, the movable core 124, and the yoke 129 is formed, and the magnet by the latch permanent magnet 127 is formed. According to the circuit formation, the movable core 124 is formed with a latch function for maintaining a strong contact state with the yoke 129 in the downwardly moved position, which is a problem that the movable core 124 moves when an external shock occurs. It is resolved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. And can be modified and changed.

110: contact portion 111: fixed contact
112: movable contact 113: upper resin housing
114: lower resin housing 115: arc absorption permanent magnet
116: insulation barrier 117: intake and exhaust pipe
118: pipe cap 120: solenoid portion
121: yoke plate 122: female coil part
123: fixed core 124: movable core
125: movable core pin 126: return spring
127: permanent magnet for latch 128: magnetic insulating plate
129: York 130: mine box
140: enclosure 150: cover

Claims (2)

delete A pair of fixed contacts 111 electrically connected to the load side, a movable contact 112 for intermittent high current flow by contacting and spaced operation with the fixed contacts 111, and an insulating synthetic resin, the arc arc inside A space is formed to accommodate the fixed contact 111 and the movable contact 112, the upper resin housing 113 is filled with a reducing gas, and the lower resin housing 114 to insulate the lower portion of the upper resin housing 113 A contact part 110 including a;
The yoke plate 121 disposed on the bottom surface of the lower resin housing 114 and the excitation coil part in which a plurality of coils are wound around a cylindrical bobbin disposed below the yoke plate 121 and vertically penetrated through the inner center thereof ( 122 and a cylindrical fixed core 123 having an inner center vertically penetrated by being fitted into the inner through hole of the excitation coil part 122, and being accommodated in the inner through hole of the fixed core 123. Sliding movement in the direction to move through the movable core 124 to contact and spaced apart on the yoke plate 121 side when forming the magnetic circuit, and the lower resin housing 114 and the yoke plate 121 and the upper portion is A movable core pin 125 connected to the movable contact 112 and a lower portion connected to the movable core 124, and a return spring 126 for generating an elastic force so that the movable core 124 is spaced apart from the yoke plate 121. ), A latch permanent magnet 127 disposed below the excitation coil portion 122 and spaced apart from each other, a magnetic insulating plate 128 disposed below the latch permanent magnet 127, and the excitation nose A solenoid part 120 including a yoke 129 which is configured to have a 'b' shape to surround the lower portion of the side portion of the part 122 and the lower portion of the magnetic insulating plate 128 and at least two are spaced apart from each other; Including,
The latch permanent magnet 127 is disposed so as to contact while wrapping the circumference of the fixing core 123,
The magnetic insulator plate 128 is to maintain a plurality of latch permanent magnets 127 and the yoke 129 spaced apart from each other, the spaced apart from each other,
The upper end of the yoke 129 is in contact with the yoke plate 121, and one end of the latch permanent magnet 127 is in contact with any one of the inner wall surfaces, and the bent lower surface is provided only when the movable core 124 is downward. In contact with each other,
The yoke plate 121, the fixed core 123, the movable core 124, and the yoke 129 may be formed of a metal material to form a magnetic path by the latch permanent magnet 127. Contact device with latch mechanism.

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