KR102256432B1 - Contact device comprising insulated movable contact - Google Patents

Abstract

In a contact device comprising an insulated moving contact in accordance with one embodiment of the present invention, provided is the contact device comprising: one or more coils; a moving core driven by the coil; a pair of fixed contacts for applying DC power; a moving contact including a through-hole in the center, capable of moving so as to be in contact with the pair of fixed contacts; a moving shaft operating in conjunction with the moving core, and configured to penetrate through the through-hole in the moving contact; and a moving contact insulator configured with an insulating material and configured to surround the through-hole of the moving contact. Therefore, the present invention is capable of ensuring insulation between a coil part and a main contact part.

Description

Contact device with insulated movable contact {CONTACT DEVICE COMPRISING INSULATED MOVABLE CONTACT}

The present invention relates to a contact device comprising an insulated movable contact. More specifically, the present invention relates to a configuration of an insulated movable contact of a DC high voltage contact switch device applicable to renewable energy, electric vehicles, DC power control, battery power control, and the like.

The direct current contact device can be used in direct current transportation systems such as renewable energy such as solar power generation, energy storage devices, electric vehicles, and rapid charging devices. In recent years, energy storage devices, electric buses, and fast charging systems have a tendency to increase the voltage and current, while the operating voltage continues to rise. In addition, as the voltage to be used increases, the arc generated during interruption and the demand for the insulation voltage of the power supply side and the load side also increase. When the DC voltage rises, it becomes difficult to cut off, and a contact device that can block more safely and satisfy the safe insulation between the poles of the contact is required.

Conventionally, the movable contact is insulated in the form of receiving the movable contact, or the moving shaft is wrapped with an insulating plastic mold and the separated insulating material is integrally wrapped with a holder to place the movable contact and the contact pressure spring inside. As a method of using or using a lever shape in the mold at the end of the movable contact, inserting it in the center of the movable contact, and restricting the movement to the moving shaft, the arc inflow of metal vapor caused by the arc generated when the main contact is opened and closed became a problem. .

In addition, there is a problem in that the movable contact is fixed to the shaft pin at the lower side of the movable contact, and the movable contact is pushed further by O/T (over travel) to cause mechanical damage to the micro-switch used as an auxiliary contact.

Therefore, there is a need for a contact device including an insulated movable contact of a new structure that solves these problems.

1. Korean Patent Registration No. 10-1034371 2. Korean Patent Registration No. 10-1902012

In the present invention, it is possible to secure the insulation of the coil part and the main contact part by separating the conductive part and the insulating part of the movable contact, and in particular, the contact part of the moving shaft and the contact pressure spring interlocked with the electromagnet through insert injection at the center of the movable contact. An object of the present invention is to provide a contact device capable of securing insulation of a coil portion and a main contact portion through a configuration of a movable contact insulator to insulate.

In addition, an object of the present invention is to form an auxiliary contact lever integrally formed with the movable contact insulator, extending from the insulator formed integrally with the movable contact, and operating the auxiliary contact capable of monitoring and feeding back the operation of the main contact. .

In addition, the present invention can prevent arc inflow as much as possible by operating the metal vapor caused by the arc generated when the main contact is opened and closed with the structure of the upper circular protrusion of the movable contact insulator and the partition wall structure formed in the arc cover. An object of the present invention is to provide a contact device that suppresses the inflow of arc vapor of a metal component into an O/T (over travel) space applied to a movable contact by operation.

In addition, the present invention provides a contact device capable of minimizing the change in the contact pressure of the contact due to the twisting of the contact pressure spring by accommodating the contact pressure spring in the configuration of the lower circular protrusion of the insulator that is integrally inserted into the movable contact. It aims to do.

In addition, in the present invention, through the configuration of an auxiliary contact operation lever that is formed integrally by extending from one side of the movable contact insulator, the position change of the movable contact is stopped at the contact point with the fixed contact, and only the contact pressure spring is limited by the travel distance of O/T. An object of the present invention is to provide a contact device capable of accurately securing an operating point and a return point of a micro switch used as an auxiliary contact by limiting the positional variation of the auxiliary contact operation lever by being compressed.

In addition, the present invention uses the excitation force of the electromagnet to make an electrical connection by contacting the movable contact to the fixed contact, and it is possible to control the DC power by using a permanent magnet that extinguishes the DC arc. By securing the insulation distance of the coil operation part, it protects the moving shaft from arc and arc heat caused by opening and closing the main contact, and secures insulation between the operation part and the coil part with an insulator molded by insert injection integrally at the center of the movable contact. An auxiliary contact operation lever that can operate an auxiliary contact by extending an insulator formed integrally with the contact, and a movable contact by placing a contact pressure spring inside the circular protrusion under the insulator and limiting the twisting and movement of the contact pressure spring. By keeping the contact pressure in contact with this fixed contact constant, it is possible to control the DC power safely and electrically, and by blocking the leakage current between the main contact and the operation coil part, the reliability of the product is secured, and the upper and lower parts of the insulator are Its purpose is to provide a DC contact point device that can contribute to productivity improvement, quality security, and cost reduction as a storage space for parts.

The problems to be solved of the present invention are not limited to the contents mentioned above, and other technical problems that are not mentioned will be clearly understood by those of ordinary skill in the art from the following description.

In one embodiment of the present invention, a contact device comprising an insulated movable contact, comprising: at least one coil; A movable core driven by the coil; A pair of fixed contacts for applying DC power; A movable contact movable to contact the pair of fixed contacts and including a through hole in the center; A movable shaft interlocked with the movable core and configured to penetrate through a through hole of the movable contact; And a movable contact insulator configured to surround the through hole of the movable contact and composed of an insulator.

Here, the movable contact insulator may be integrally formed with the movable contact through insert injection.

In addition, the movable contact insulator may include an upper circular protrusion for forming a circular partition wall on the upper side, and the upper side of the movable shaft may penetrate and protrude into a space within the upper circular protrusion.

Further, a nut fastened to the upper side of the moving shaft may be further included, and separation of the movable contact may be limited through the nut.

Further, the arc cover further comprises an arc cover configured to be fixedly disposed by inserting the pair of fixed contacts, wherein the arc cover is disposed between the outside of the upper circular protrusion of the movable contact insulator and the pair of fixed contacts, respectively, and upper It may include a pair of arc cover partition walls extending vertically from the surface.

In addition, the movable contact insulator includes a lower circular protrusion for forming a circular partition wall at the lower side, a contact pressure spring is accommodated in the lower circular protrusion, and movement of the contact pressure spring may be restricted through the lower circular protrusion. have.

In addition, the movable contact insulator may include an auxiliary contact operation lever extending at one side and integrally formed, and the auxiliary contact operation lever may move in association with an operation of the movable contact.

In addition, the auxiliary contact manipulation lever may be stopped by interlocking with the movable contact when the moving shaft moves over travel (O/T).

According to the present invention, it is possible to secure the insulation of the coil part and the main contact part by partitioning the conductive part and the insulating part of the movable contact. In particular, the contact part of the moving shaft and the contact pressure spring interlocked with the electromagnet through insert injection at the center of the movable contact. It is possible to provide a contact device capable of securing insulation of the coil portion and the main contact portion through the configuration of a movable contact insulator that insulates the contact surface.

In addition, according to the present invention, the configuration of the auxiliary contact lever that extends from the insulator formed integrally with the movable contact and operates the auxiliary contact capable of monitoring and feeding back the operation of the main contact can be integrally formed with the movable contact insulator. .

In addition, according to the present invention, the metal vapor caused by the arc generated when the main contact is opened and closed is operated to overlap the structure of the upper circular protrusion of the movable contact insulator and the partition wall structure formed in the arc cover, thereby preventing the arc inflow as much as possible and moving. It is possible to provide a contact device that suppresses the inflow of arc vapor of a metal component into the O/T space applied to the movable contact by the operation of the shaft.

In addition, according to the present invention, by receiving the contact pressure spring in the configuration of the lower circular protrusion of the insulator integrally insert-molded to the movable contact, a contact device capable of minimizing the change in contact pressure of the contact due to twisting of the contact pressure spring. Can provide.

In addition, according to the present invention, through the configuration of the auxiliary contact operation lever formed integrally by extending from one side of the movable contact insulator, the position change of the movable contact is stopped at the point of contact with the fixed contact, and the contact pressure is as much as the travel distance of O/T. By compressing only the spring, it is possible to provide a contact device capable of accurately securing an operating point and a return point of a micro-switch used as an auxiliary contact by limiting the position change of the auxiliary contact operation lever.

In addition, according to the present invention, the present invention is a contact device that insulates the central part of the movable contact in a contact device using the principle of an electromagnet to increase the insulation distance between the main contact and the operation coil. It is designed to be suitable for controlling inverters, electric vehicles, chargers, ESS and DC power, and in particular, the insulator at the center of the movable contact that has secured insulation reliability is a direct current contact switch that insulates the through hole of the moving shaft and the auxiliary contact operating lever that is integrally formed. Insulation can be secured by the insulation structure of the movable contact from leakage current that is induced at the main contact and destroys the insulation from the operation coil part when the main contact is operated and returned by the device.

In addition, according to the present invention, the sliding part of the moving shaft is protected from the arc voltage generated in the open/closed state of the main contact and the metal vapor scattered by the arc, and a contact pressure spring is placed on the circular protrusion integrally formed under the insulation of the movable contact to make contact. It is possible to provide a direct current high voltage contact switch device capable of constantly maintaining a contact pressure applied to a movable contact by limiting twisting and clearance of a pressure spring.

In addition, according to the present invention, the auxiliary contact operation lever integrally formed with the movable contact can move to the moment when the movable contact contacts the fixed contact and apply a constant pressure applied to the micro-switch lever fixedly disposed on the arc cover. It is possible to provide a direct current high voltage contact switch device having an auxiliary contact capable of constantly maintaining and limiting the pressure applied to the micro switch lever.

The effects of the present invention are not limited to the contents mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a cross-sectional view of a direct current contact device in an open state of a movable contact according to an embodiment of the present invention.
2 is a cross-sectional view of a direct current contact device in a closed state of a movable contact according to an embodiment of the present invention.
3 is a view for explaining a configuration of a movable contact assembly in which a movable contact and a movable contact insulator are coupled.
4 is a view for explaining a structure in which insulation is secured through an upper circular protrusion of a movable contact insulator and a partition wall structure of an arc cover.
5 is a view for explaining a structure in which insulation is secured through a lower circular protrusion of a movable contact insulator and a lower partition wall structure of a ceramic housing.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

The terms used in the present specification are for describing exemplary embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase.

As used herein, "comprises", "comprising" refers to the recited component, step, operation, and/or element is the presence of one or more other elements, steps, operations, and/or elements, or Does not exclude addition.

In addition, terms including ordinal numbers such as first and second used in the present invention may be used to describe the elements, but the elements should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from other components. In addition, in describing the present invention, when it is determined that a detailed description of a related known technology may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

In addition, constituent units shown in the embodiments of the present invention are independently illustrated to represent different characteristic functions, and does not mean that each constituent unit is formed of a separate constituent unit. That is, each constituent unit is described as being listed as a respective constituent unit for convenience of description, and at least two constituent units of each constituent unit are combined to form a single constituent unit, or one constituent unit may be divided into a plurality of constituent units to perform a function. Integrated embodiments and separate embodiments of each of these components are also included in the scope of the present invention unless departing from the essence of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The configuration of the present invention and its effect will be clearly understood through the detailed description below.

1 is a cross-sectional view of a direct current contact device in an open state of a movable contact according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a direct current contact device in a closed state of a movable contact according to an exemplary embodiment of the present invention.

Looking at the assembly process of the direct current contact device according to the present invention with reference to FIG. 1, the primary coil 09-1 is wound on the bobbin to increase the initial excitation force of the contact point, and is connected in common with the primary coil start line. In order to maintain the contact operation of, the secondary coil 09-2 may be wound to reduce the holding current. Such a double coil winding arrangement can reduce the surge voltage that comes out from the outside due to PWM (Pulse Width Modulation) control that occurs during input and maintenance, and can reduce the cause of failure due to electronic elements in the control of the input and maintenance of the coil. . Connect the start line of the winding of the sustaining coil to one of the three coil terminals, the end of the sustaining coil to the center terminal, respectively, and the start line of the inrush coil are electrically connected to the start line of the sustaining coil. Three coil terminals may be arranged to connect the end wires of the inrush coil to the coil terminals from which are drawn out. In such a shape of the coil, the excitation force that strongly pushes the contact pressure of the initial contact is exerted, and after the operation, the circuit is switched to a sustaining coil unit that reduces power consumption so that only the contact can be held. The method of forming integrally with the movable contact and electrically insulating the central hole of the movable contact can also implement an excitation coil operated with a single winding. The electromagnet made in this way can make an electromagnet magnet by inserting the lower core into the inner groove below the center of the bobbin.

The movable shaft 13 is fixed to the movable core 14 interlocking with the movable contact 02, and the return spring 15, the yoke plate 08, the arc base 07, the contact pressure spring 05, the movable contact ( 02) is assembled, and the nut 11 is fastened to the movable shaft 13 inserted into the hole in which the insulation of the central penetrating portion of the movable contact 02 is secured and fixed with a screw fixer to complete the movable contact 02 assembly. .

In addition, the fixed contact part makes a U-shaped groove concave in the arc cover 03, and the micro micro switch 19 is inserted into the U-shaped groove to be seated, and the fixed contact 01 is assembled to the left and right, and the fixed contact 01 The assembly of the fixed contact part can be completed by assembling a ceramic housing 06 capable of extinguishing a high heat arc on the left and right and inserting the permanent magnet 20 for extinguishing the arc. This assembly is assembled in the center of the upper side of the bobbin, and the yoke plate (08) and the arc cover (03) are screwed to a pair of screw fasteners formed on the arc cover (03) to make a contact bar assembly, and cup-shaped with steel. It can be precisely press-fitted into the yoke made of the case, and the concave grooves of the case and the cover are made into pillars on the inside and outside so that the concave grooves of the case and the cover cannot be rotated.

In addition, an oxygen-free copper pipe is inserted into a concave groove made into a circular shape through the inside of the contact device on the upper side of the arc cover (03), and is completely sealed with a one-component or two-component high-density epoxy. A direct current high voltage contact point with a structure that makes the inside of the contact device in a vacuum state by using an oxygen-free copper pipe as the only connection passage for exhaust and supply air and seals the external insulating gas with an insulating gas that maintains a density higher than atmospheric pressure. It is possible to manufacture a switch device.

Referring back to FIG. 1, the magnetoelectric force generated in the excitation coil by applying power to the excitation coil of the DC contact switch device is from the fixed core 16 to the movable core 14, and the movable core 14 to the yoke plate 08. ), a magnetic closed circuit is formed from the yoke plate 08 to the yoke 04, and the movable core 14 is adsorbed to the yoke plate 08 by the flow of the excitation current. The movable movable core 14 is fixed with the movable shaft 13, and the movable shaft 13 passes through the hole in the center of the yoke plate 08 and is fitted in the center hole of the arc base 07. 13) by making a lower circular protrusion (10-2) on the lower side to be fitted, the movable contact contact pressure spring (05) may be assembled and disposed. The movable shaft 13, which penetrates the movable contact insulator 10 and partially protrudes upward, is a movable contact by fastening a nut 11 inside the upper circular protrusion 10-1 of the insulating part 10 of the movable contact. You can limit the movement and departure of the player. The assembly thus assembled is coupled to and fixed to the upper arc cover 03 with a screw to a pair of screw fastening parts made on the yoke plate 08, and at this time, the arc cover 03 is a permanent magnet 20 for arc extinguishing inside. The micro-switch 19, which is accommodated and used as an auxiliary contact, is assembled and disposed, and a pair of fixed contacts 01 may be disposed on the upper side of the arc cover 03.

The assembly thus completed is input from the power side of the fixed contact 01, electrically connected to the fixed contact 01 on the load side by contact of the movable contact 02, and a moving shaft 13 that moves through the movable contact 02. The movable contact insulator (10) formed integrally with the movable contact (02) by insert injection can be electrically insulated, and the movable core (14), the fixed core (13), and the yoke plate ( 08), the yoke (04), the excitation coil (09-1, 09-2) can be cut off the electrical flow generated by the energization of the main contact. Through such a configuration, it is possible to prevent electrical leakage occurring at the coil unit and the main contact, prevent the high voltage induced at the main contact from being induced by the low voltage of the coil operation unit, and secure electrical insulation.

Coil operation power is applied to the coil terminal 17 extending from the excitation coil, and the movable core 14 moves to the yoke plate 08 according to the principle of an electromagnet, and at this time, it is formed integrally with the movable contact 02. The made auxiliary contact operation lever 10-3 operates the auxiliary contact by pressing the micro-switch lever 19-1 used as the auxiliary contact, and the contact is closed as shown in FIG. 2.

In addition, when the coil operation power is removed, the movable core 14 is separated from the yoke plate 08, contrary to the above operation, and at this time, the movable contact 02 is integrally made by insert injection and the auxiliary contact is operated in conjunction with the moving shaft. The lever 10-3 is separated from the micro micro switch lever 19-1, and the micro micro switch 19 used as an auxiliary contact is in an open state, and the contact is in an open state as shown in FIG. 1.

The present invention relates to an insulation structure of a movable contact 02 opposed to a fixed contact 01 inside a DC contact switch device, and in particular, an electromagnetic coil portion for opening and closing the main contact and the main contact, and a movable contact securing insulation ( 02), the movable core 14 interlocked with the movable shaft 13 by insulating the contact part of the contact with the movable shaft 13 and the contact pressure spring 05 by insert injection molding in the center of the movable contact 02, movable A fixed core 16 constituting a magnetic circuit with the core 14, a yoke made in a cup shape with a magnetic material forming a magnetic path with the fixed core 16, and a coil and a yoke arranged close to the inner surface of the yoke and made of insulating tape. In a structure that insulates between the movable contacts (02) of the main contact, the movable shaft (13), and the contact pressure spring (05) are insulated from the movable contacts (02), the leakage current to the operating unit is insulated from the movable shaft (13). It is possible to provide an insulating structure to block. In addition, when the movable contact insulator 10 and the extended auxiliary contact operation lever 10-3 are integrated so that the movable contact 02 contacts the fixed contact 01, the O/T of the moving shaft 13 When moving by as much, the auxiliary contact operation lever 10-3 is interlocked with the movable contact 02 and stops at the contact point. In addition, it is possible to design the movable contact 02 in the form of enclosing the inside of the through hole made in the center of the movable contact 02 with insulation, and the insulated structure of the switching unit and the coil operation unit for DC high voltage power. have.

In addition, according to the conventional configuration, the movable contact contacts the fixed contact and the voltage flowing through the movable contact moves to the movable core through the movable shaft and the contact pressure spring disposed below the movable contact, and the movable core is a fixed core, and the fixed core. The voltage leaked from the yoke flows into the yoke and the voltage leaks to the outer surface of the cup-shaped yoke, eventually destroying the insulation of the contact part and the operation coil part. In addition, since the contact is opened and closed in a small space, the arc voltage generated when the contact is opened or closed due to the opening and closing of the arc and the main contact can destroy the insulation through the moving shaft.

In order to solve this problem, the present invention provides plastic on the movable contact 02 so that insulation is secured between the moving shaft 13 of the central part of the movable contact 02 and the conductor of the contact pressure spring 05 and the movable contact 02. Insulation can be secured by insert molding as an insulating material such as.

In addition, according to the present invention, after completely sealing the inside and outside of the product with high-density epoxy, vacuum the inside of the contact device with an exhaust pipe made of oxygen-free copper pipe, and then use atmospheric pressure for cooling and rapid diffusion of inert gas and arc through the same exhaust pipe. DC power supply, battery control, ESS, electric vehicle with a structure that is filled with a higher insulating gas and completely airtightly bonds the exhaust pipe made of oxygen-free copper to completely block external air and block it from corrosive gases such as oxygen inside the product. It can provide a contact device that blocks leakage current by completely blocking the circuit of the DC high voltage contact switch device such as charger, UPS, solar inverter, etc. with electrical insulators.

In addition, the direct current contact switch device of the present invention protects the moving shaft 13 from arc voltage and arc heat that accompany the opening and closing of the direct current power source by arranging the permanent magnet 20 for arc extinguishing to drive the arc. The auxiliary contact operation lever 10-3 for monitoring the state of the main contact is integrated with the movable contact insulator 10 to ensure the reliability of insulation.

3 is a diagram for explaining the configuration of a movable contact assembly in which a movable contact and a movable contact insulator are coupled.

The movable contact insulator 10 is configured to surround the through hole of the movable contact 02, and may be made of an insulating material such as engineering plastic. The movable contact insulator 10 may be formed integrally with the movable contact 02 through insert injection, and the movable contact insulator 10 integrally formed with the movable contact 02 is a central part of the movable contact 02 as a conductor. The sliding portion 13-1 of the movable shaft 13, which is fitted in the through hole 02-1 and interlocked with the movable core 14, is also formed integrally with the movable contact 02. It is inserted into the hole and the main contact is electrically connected to ensure electrical insulation between the movable contact 02 and the operation coil unit when energized.

In addition, the movable contact insulator 10 may include an upper circular protrusion 10-1 for forming a circular partition wall on the upper side, and the upper side of the movable shaft 13 is in a space within the upper circular protrusion 10-1. Some areas may protrude through penetration.

In addition, the movable contact insulator 10 includes a lower circular protrusion 10-2 for forming a circular partition wall at the lower side, and a contact pressure spring 05 is accommodated while maintaining insulation in the lower circular protrusion 10-2. May be, and the movement of the contact pressure spring 05 through the lower circular protrusion 10-2 may be restricted.

In addition, the movable contact insulator 10 includes an auxiliary contact operation lever 10-3 that extends to one side and is integrally formed, and the auxiliary contact operation lever 10-3 moves in conjunction with the operation of the movable contact 02. And, the auxiliary contact manipulation lever 10-3 may be stopped by interlocking with the movable contact 02 when the moving shaft 13 moves over travel (O/T).

More specifically, the movable contact insulator 10 formed integrally with the movable contact 02 is the movable contact ( 02) stops at the contact surface of the fixed contact 01 and the contact pressure spring 05 disposed below the movable contact 02 exerts a compressive force as much as O/T to increase the contact pressure to the movable contact 02. At this time, the auxiliary contact operation lever 10-3 extended to the insulator 10 integrally formed with the movable contact 02 stops at the contact surface of the movable contact 02, and the auxiliary contact is fixed to the arc cover 03. It is stored and connected to the auxiliary contact terminal for electrical connection to the outside by soldering, etc., so that electrical connection to the outside can be made. At this time, the micro-switch 19 fixedly arranged on the arc cover 03 monitors the operation state of the main contact, and controls the battery and manages the system by feeding back the state of contact and welding of the main contact. system) can send a signal to the control device.

The operation principle of the movable contact 02 is that the movable core 14 moves upward by the excitation current flowing through the electromagnetic coil, and when the excitation current is removed, the movable core 14 moves downward due to the compressed return force of the return spring 15. The return, fixed to the movable core 14, and the extended movable shaft 13 are connected by inserting insulators into the hole in the center of the rectangular plate shape of the movable contact 02 made of a material with good conductivity, and connected to the movable contact insulator. (10) A contact pressure spring 05 may be accommodated and disposed between the lower circular protrusion 10-2 and the moving shaft 13 on the lower side.

At this time, when the main contact is in an electrical closed state, the main contact and the moving shaft 13 can secure the insulation from the excitation coil part by the movable contact insulator 10 insert-molded on the movable contact 02. If the battery voltage and current are energized to the main contact and the voltage of the main contact is not insulated from the coil part, the coil voltage of the operation part will be affected. do. According to the configuration of the movable contact insulator 10 according to the present invention, the separated insulation of the main contact, the excitation coil part, and the auxiliary contact part enables a safe control of the contact device, and the leakage voltage to the excitation coil part flowing from the main contact The insulation structure integrally molded by insert injection of the movable contact 02 so that the main contact, the auxiliary contact, and the excitation coil can be insulated.

In addition, the movable contact 02 of the contact device according to the present invention accommodates the contact pressure spring 05 by the lower circular protrusion 10-2 formed on the lower side, prevents twisting, and the upper circular protrusion 10 formed on the upper side. The auxiliary contact lever 10-3 can protect the fixed part of the nut 11 of the moving shaft 13 from arc by -1), and extend the movable contact insulator 10 to manipulate the auxiliary contact. ) Can be configured to form. In this way, the auxiliary contact operation lever 10-3 integrally formed with the movable contact insulator 10 stops the position change at the contact point of the movable contact 02 and the fixed contact 01, and the O/T travel distance is a contact pressure spring. Since only (05) is charged, it is possible to accurately secure an operating point and a return point of the micro-switch 19 used as an auxiliary contact by limiting the position change of the auxiliary contact operation lever 10-3. This is because the contact can be welded when the main contact is short-circuited due to an accidental current, and even if power is removed from the coil during welding, the contact cannot continue to supply power through welding to protect the device at the rear end of the contact device. It can play an important role of accurately monitoring the state of the main contact and feeding back the welding and separation of the main contact by interlocking with the auxiliary contact.

In addition, the circular protrusions formed on the upper and lower sides of the movable contact (02) facilitate assembly of the contact pressure spring (05) and the nut (11), protect against arc voltage and arc heat caused by opening and closing of the main contact, and Productivity and cost can be reduced by lowering the insulation power of the insulating tape wrapped around the coil winding to insulate the main contact and the coil part.

In addition, as shown in FIG. 3, the movable shaft 13 penetrates through the central hole of the movable contact 02, and the sliding portion hole of the central groove of the movable contact insulator 10 also connects the conductor of the movable contact 02 with a constant thickness. By securing the insulation wrapped in a circle, the part where the moving shaft 13 moves is protected from the conductive metal vapor generated by the opening and closing of the contact point, and the upper circular protrusion 10-1 and the partition wall of the arc cover 03 are overlapped with each other. In the form of overlapping each other, the inflow of arcs can be suppressed as much as possible.

That is, the movable shaft 13 moves so that the movable contact 02 contacts the fixed contact 01, and the movable shaft 13 compresses the contact pressure spring 05 by O/T and moves the movable contact 02 upward while compressing the contact pressure spring 05. Sliding the insulated central part of the movable shaft 13 is directed upward, and at this time, the inflow of metallic dust that interferes with the reciprocating motion of the movable shaft 13 due to the burning of the movable shaft 13 due to the arc and the inflow of arc vapor. The effect of minimizing can be obtained.

In addition, the auxiliary contact operation lever 10-3 for manipulating the auxiliary contact is formed integrally with the movable contact insulator 10 and is interlocked with the operation of the movable contact 02 and is restored, and the auxiliary contact operation lever 10-3 ) Can accurately control the auxiliary contact used as the micro switch 19.

In addition, the insulating structure of the lower circular protrusion 10-2 formed integrally with the movable contact 02 and accommodating and arranging the contact pressure spring 05 is the twisting of the contact pressure spring 05 and the movable shaft 13 The play may be limited so as to minimize the play of the contact pressure spring 05 so as to minimize the change in the contact pressure. In addition, the contact surface of the movable contact (02) of the contact pressure spring (05) is insulated and an insulator (10) formed integrally with the movable contact (02) is disposed, and the conductive part of the contact pressure spring (05) and the movable contact (02) And insulation can be secured.

In addition, the insulation between the coil control unit and the main contact point can minimize accidents due to leakage current in the harsh switching environment of high DC voltage, and the leakage current from the contact device discharges the battery even when there is no load, and the discharged load is It can lead to malfunction and can solve the problem of gradually decreasing the charge amount of the battery.

In addition, the present invention can provide an electrically safe main contact, such as a fire of an electric vehicle and a fire of an energy storage device, and a DC contact device having insulation with the coil control unit, by blocking leakage current by insulation of the main contact and the coil operation unit.

4 is a view for explaining a structure in which insulation is secured through an upper circular protrusion of a movable contact insulator and a partition wall structure of an arc cover.

A nut 11 for fixing the movable shaft 13 is fastened to the inside of the upper circular protrusion 10-1 on the upper side of the movable contact insulator 10 of the movable contact 02, and the movable contact through the nut 11 The departure of (02) can play a limiting role. In addition, at least one pair of arc cover partition walls (03-1) extending vertically downward from the upper surface of the arc cover (03) are formed on both sides of the upper circular protrusion (10-1) of the movable contact insulator (10). Arranged between the fixed contacts (01), the upper circular protrusions (10-1) move up and down, and the bulkheads overlap and cross each other so that the arc due to the opening and closing of the main contacts passes to the other opposite fixed contacts (01). The shielding function can be effectively provided.

In addition, in order to secure the insulation distance from the arc generated when the main contact is opened and closed, a pair of arc cover bulkheads (03-1) are formed on the arc cover (03) to protect the auxiliary contact from arc and move the movable contact (02). Insulation between the moving shaft 13 and the movable contact 02 increases the clearance and creepage distance between the main contact and the excitation coil so that it can be optimally designed to meet international standards.

5 is a view for explaining a structure in which insulation is secured through a lower circular protrusion of a movable contact insulator and a lower partition wall structure of a ceramic housing.

The lower circular protrusion 10-2 of the movable contact insulator 10 integrally formed with the movable contact 02 accommodates and arranges a contact pressure spring 05 exerting a contact force of the movable contact 02, and a contact pressure spring ( 05) can be configured to limit the clearance so as to maintain a constant contact pressure and to maintain a constant contact pressure, and to secure electrical insulation generated at the main contact at the contact surface (05-1) of the contact pressure spring (05).

In addition, as shown in FIG. 5, through the partition wall structure through a pair of lower partition walls 06-1 of the ceramic housing extending in the vertical direction from the lower surface of the ceramic housing 06, the lower circular protrusion 10-2 is It is possible to provide a direct current high voltage contact switch device that overlaps with the circular partition wall formed by and secures electrical insulation induced and leaking from the contact of the main contact.

The embodiments described in the specification of the present invention are for illustrative purposes only, and the present invention is not limited thereto. The scope of the present invention should be interpreted by the following claims, and all technologies within the scope equivalent thereto should be construed as being included in the scope of the present invention.

01: fixed contact 02: movable contact
02-1: movable contact through hole 03: arc cover
03-1: arc cover bulkhead 04: yoke
05: contact pressure spring 05-1: contact pressure spring contact surface
06: ceramic housing 06-1: ceramic housing lower bulkhead
07: arc base 08: yoke plate
09-1: primary coil 09-2: secondary coil
10: movable contact insulator 10-1: upper circular protrusion
10-2: lower circular protrusion 10-3: auxiliary contact operation lever
11: nut 12: plain washer
13: moving shaft 13-1: moving shaft sliding part
14: movable core 15: return spring
16: fixed core 17: coil terminal
18: auxiliary contact terminal 19: micro micro switch
19-1: micro micro switch lever 20: permanent magnet for arc extinguishing

Claims (8)

In the contact device comprising an insulated movable contact,
One or more coils;
A movable core driven by the coil;
A pair of fixed contacts for applying DC power;
A movable contact movable to contact the pair of fixed contacts and including a through hole in the center;
A movable shaft interlocked with the movable core and configured to penetrate through a through hole of the movable contact;
A movable contact insulator configured to surround the through hole of the movable contact and composed of an insulator; And
Ceramic housing constructed to extinguish the arc
Including,
The movable contact insulator includes a lower circular protrusion for forming a circular partition wall at a lower side, a contact pressure spring is accommodated in the lower circular protrusion, and movement of the contact pressure spring is restricted through the lower circular protrusion,
A contact device, wherein a pair of ceramic housing lower partition walls extending in a vertical direction from a lower surface of the ceramic housing are formed to overlap outside the lower circular protrusion to secure insulation. The contact device according to claim 1, wherein the movable contact insulator is integrally formed with the movable contact through insert injection. The contact device according to claim 1, wherein the movable contact insulator comprises an upper circular protrusion for forming a circular partition wall on an upper side, and the upper side of the movable shaft penetrates and protrudes into a space within the upper circular protrusion. The contact device according to claim 3, further comprising a nut fastened to an upper side of the moving shaft, wherein separation of the movable contact is limited through the nut. The method of claim 3, further comprising an arc cover configured to be fixedly disposed by inserting the pair of fixed contacts, wherein the arc cover is between the outer side of the upper circular protrusion of the movable contact insulator and the pair of fixed contacts, respectively And a pair of arc cover bulkheads disposed and extending vertically from an upper surface. delete The contact device according to claim 1, wherein the movable contact insulator includes an auxiliary contact operation lever extending on one side and integrally formed, and the auxiliary contact operation lever moves in conjunction with an operation of the movable contact. The contact device according to claim 7, wherein the auxiliary contact operation lever is stopped by interlocking with the movable contact when O/T (over travel) of the moving shaft is moved.

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