KR20120039272A - Electromagnetic switching device - Google Patents

Abstract

PURPOSE: An electronics opening/closing device is provided to reduce noise created when operating a driving part by reducing impacts created in a conflict process through a first buffer member and a second buffer member. CONSTITUTION: An electronics opening/closing device(10) comprises a current part(200) and a driving part(100). The driving part controls opening and closing of a contact point by using an electric signal. The driving part has a coil(110) which creates driving force of the contact point, a fixed core(140) fixed inside the coil, and a moving core(150) corresponding to the fixed core. A coil bobbin(180) is installed between the coir, the fixed core and the moving core. The fixed core and the moving core are arranged top and bottom directions according to an axial direction of the coil bobbin. The current part comprises a fixed contact point(220) and a moving contact point(210).

Description

Electronic switching device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic switching technology, and more particularly, to an electronic switching device in an electric vehicle or the like which reduces noise generated when moving a movable contact.

An electronic switchgear is an electric switch device that performs an electrical relay, and generally refers to a connection converter that energizes or cuts off a main circuit by a change in a small input current. Such relays include a contact type switchgear, a contactless switchgear, a pressure switchgear, an optical switchgear, and the like. Among these relays, the contact type switchgear is relatively simple in structure and is widely used in an automobile indicator light or a wiper motor.

In addition, the electronic switchgear for opening and closing the DC power is an electric vehicle such as a hybrid vehicle, a fuel cell vehicle, a golf card, and an electric forklift, and is installed between the storage battery and the DC power converter to provide a direct current from the storage battery. It supplies or cuts power to DC converter.

In addition, the electronic switch for opening and closing the DC power is installed between the DC generator and the inverter for converting the DC power into AC power of commercial frequency and voltage in an environment-friendly power generation system such as a solar power system and a wind power generation system. It also functions to supply or cut off DC power to the inverter.

Electronic switchgear for opening and closing the DC power used in the electric vehicle, the noise should be minimized in order to maintain indoor quietness.

An object of the present invention is to provide an electronic switching device that can reduce the vibration and noise generated when the movable contact moves.

The present invention for achieving the above object is a coil that is excited or demagnetized according to whether the control current is energized, a yoke installed around the coil to form a magnetic path around the coil, and the yoke around the coil together with the yoke A metal plate for forming a magnetic path in the metal plate, a fixed core fixed to the metal plate, a movable core in contact with the fixed core when the coil is excited, and provided between the movable core and the fixed core, A drive unit including a return spring for applying an elastic force to separate the movable core from the fixed core, and a shaft connected to the movable core and movable with the movable core; It is installed on the other end side of the shaft and fixed to the movable contact movable in accordance with the movement of the shaft, and the movable contact, the electrical circuit is closed or open by contact or separation with the movable contact A first buffer for reducing noise and impact caused by contact between the metal plate and the movable contact when the movable contact and the fixed contact are separated between both bottom ends of the movable contact and the metal plate; An electronic switchgear having a member disposed thereon is provided.

The electronic switching device according to the present invention can reduce the noise generated during operation of the drive unit by reducing the impact generated in the process of colliding or moving the movable contact from the fixed contact point by the drive unit by the first buffer member and the second buffer member. Can be.

In addition, there is an effect that can reduce the impact and noise generated when colliding with the movable contact during the lifting and lowering of the shaft.

1 is a cross-sectional view showing an open state of the electronic switchgear according to the present invention;
Figure 2 is a cross-sectional view showing a closed state of the electronic switchgear according to the present invention.

Hereinafter, the configuration and operation of the present invention according to the accompanying drawings will be described in more detail.

1 is a cross-sectional view showing an open state of the electronic switchgear according to the present invention, Figure 2 is a cross-sectional view showing a closed state of the electronic switchgear according to the present invention.

First, the basic structure of the electronic switch 10 will be described. Electronic switching device 10 according to the present invention is configured to include a conducting unit 200 and the driving unit (100).

The driving unit 100 serves to control the opening and closing of the contact using an electrical signal. The electronic switch 10 typically switches an external device connected to the electronic switch 10 by the vertical movement of the driver 100.

The driving unit 100 is disposed to face the fixed core 140 and the fixed core 140 fixedly disposed in the coil 110, the coil 110 generating a driving force of a contact by generating a magnetic force by an electrical signal. Has a movable core 150.

Between the coil 110, the fixed core 140, and the movable core 150, a coil bobbin 180 for which the coil 110 is recommended is provided, and a fixed core (up and down) along the axial direction of the coil bobbin 180 ( 140 and movable core 150 are disposed. The fixed core 140 and the movable core 150 form a magnetic path through which magnetic flux density generated by the coil 110 passes. The movable core 150 has a driving force to move up and down by the magnetic flux generated by the coil 110.

The core container is made of a nonmagnetic material between the coil bobbin 180, the fixed core 140 and the movable core 150, and is formed in a cylindrical shape in which a surface of the conducting portion 200 side is opened and the bottom of the other side is blocked. 190.

The core container 190 has a shape such as a container in which the fixed core 140 and the movable core 150 are accommodated, and the outer diameter of each of the fixed core 140 and the movable core 150 has an inner diameter within the core container 190. It is formed into a cylinder having the same diameter. The movable core 150 is movable in the axial direction of the core container 190.

The moving range of the movable core 150 is determined between the joining position to be bonded to the fixed core 140 and the bottom surface of the other side of the core container 190 and the initial position falling. Bonding force of the movable core 150 to the fixed core 140 is provided by the coil spring by the coil 110, the force that the movable core 150 is returned to the initial position by the return spring 160 Is provided.

In addition, the central portion of the fixed core 140 and the movable core 150 has a through hole provided with a shaft 170 connected through the energizing portion 200 and the driving portion 100 in the axial direction. The shaft 170 penetrates in the axial direction through the through hole, and the shaft 170 has the movable contact 210 at the upper end and the movable core 150 at the lower end thereof so that the movable core 150 moves up and down. To the movable contact 210.

The energization unit 200 includes a fixed contact 220 and the movable contact 210, and includes an opening and closing structure of the contact so that switching to an external device connected to the electronic switching device 10 is performed.

In addition, a cover 240 formed in a box shape having a lower opening is mounted in a form above the driving unit 100. A terminal hole is provided at an upper portion of the cover 240, and a fixed contact ( 220) and the fixed terminal is inserted.

In the cover 240, a movable contact 210 is disposed at the bottom of the fixed contact 220 and coupled to the shaft 170 and having a space for contacting and separating with the fixed contact 220 for switching.

As described above, the energization unit 200 composed of the movable contact 210, the fixed contact 220, and the cover 240 is positioned at the upper portion of the electronic switching device 10, and the fixed core 140 and the movable core are located at the lower portion thereof. The driving unit 100 including the 150, the yoke 120, the coil 110, and the return spring 160 is positioned. Here, when power is applied to the coil 110 to form a magnetic field, the movable core 150 is sucked toward the fixed core 140, and the upper conducting unit 200 is provided by the shaft 170 connected to the movable core 150. Will be activated.

In the present invention, between the lower end of both sides of the movable contact 210 and the metal plate 130, the first buffer member 300 for absorbing the noise and shock generated when the movable contact 210 and the fixed contact 220 is separated Is placed.

When the movable contact 210 is separated from the fixed contact 220, the first buffer member 300 may mitigate the shock and noise generated while the movable contact 210 descends and collides with the metal plate 130. Can be.

In addition, it is disposed between both lower ends of the movable contact 210 and the metal plate 130.

For reference, the first shock absorbing member 300 may take the form of a coil spring, and a separate support 211 is provided at a lower end of the movable contact 210 at a position corresponding to the first shock absorbing member 300. It can be provided.

Therefore, before the movable contact 210 is separated from the fixed contact 220 and descends to collide with the metal plate 130, the support 211 first contacts the first buffer member 300 to move the movable contact 210 to the metal plate ( And shocks and noises generated during the collision with 130) can be mitigated.

According to a preferred embodiment of the present invention, between the lower portion of the center of the movable contact 210 and the upper end of the shaft 170 absorbs the noise and shock generated when the movable contact 210 and the fixed contact 220 is contacted or separated. The second shock absorbing member 400 is disposed.

When the second contact member 400 is in contact with the movable contact 210 and the fixed contact 220, the shock absorber and the noise applied to the movable contact 210 may be alleviated.

The movable contact 210 has a structure in which the shaft 170 is moved up and down at the same time.

Therefore, when the shaft 170 is pushed upward to elevate the movable contact 210, vibration and collision sounds are inevitably generated.

   Therefore, in order to reduce the noise and vibration as described above, the second shock absorbing member 400 is disposed between the shaft 170 and the movable contact 210.

In addition, the guide frame 500 having a receiving port for receiving the first buffer member 300 and the second buffer member 400 may be further provided on the upper portion of the metal plate (130).

According to a preferred embodiment of the present invention, the movable contact 210 is made of a material that is elastically deformable so that the part contacting the fixed contact 220 is formed in an arc shape (Arc).

In this case, the arc-shaped movable contact 210 is made of a material having elasticity to be deformable upon contact with the fixed contact 220. The movable contact 210 has a portion in contact with the fixed contact 220 in the fixed contact 220 has an arc shape Arc. More preferably, the movable contact 210 is formed to protrude in the direction toward the fixed contact 220. That is, the center of the radius of curvature of the movable contact 210 is positioned to face the fixed contact 220.

When there are two fixed contacts 220, two arcuate movable contacts 210 are provided, and the movable contacts 210 are formed at positions facing the fixed contacts 220, respectively.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Could be. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10: electronic switchgear 100: drive unit
110: coil 120: yoke
130: metal plate 140: fixed core
150: movable core 160: return spring
170: shaft 180: coil bobbin
190: core container 200: energization unit
210: movable contact 220: fixed contact
240: cover 300: first buffer member
400: second buffer member

Claims (3)

A coil that is excited or demagnetized according to whether a control current is energized, a yoke installed around the coil to form a magnetic path around the coil, a metal plate forming a magnetic path around the coil together with the yoke; A fixed core fixed to the metal plate, a movable core in contact with the fixed core when the coil is excited, and provided between the movable core and the fixed core to provide elastic force to separate the movable core from the fixed core. A drive unit including a return spring to be applied and a shaft connected to the movable core and movable with the movable core; It is installed on the other end side of the shaft and fixed to the movable contact movable in accordance with the movement of the shaft, and the movable contact, the electrical circuit is closed or open by contact or separation with the movable contact In the electronic switching device comprising a;
And a first buffer member disposed between both lower ends of the movable contact and the metal plate to reduce noise and impact caused by the contact between the metal plate and the movable contact when the movable contact and the fixed contact are separated. The method of claim 1,
And a second buffer member disposed between the center lower portion of the movable contact and the upper end of the shaft to reduce noise and impact generated between the movable contact and the shaft when the movable contact and the fixed contact are in contact with each other. 3. The method according to claim 1 or 2,
The movable contact is made of an elastically deformable material, so that the part in contact with the fixed contact is made of an arc (Arc) electronic switching device.

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