KR20170003324U

KR20170003324U - Relay

Info

Publication number: KR20170003324U
Application number: KR2020160001424U
Authority: KR
Inventors: 양준혁
Original assignee: 엘에스산전 주식회사
Priority date: 2016-03-16
Filing date: 2016-03-16
Publication date: 2017-09-26

Abstract

According to the present invention, a magnetic body is provided on the upper surface of a movable contactor, a magnet member is provided on the lower surface of the movable contactor, and the contact strength between the movable contact and the fixed contact is increased by the magnetic force generated through the magnetic body and the magnet member. There is an effect of preventing the contactor from vibrating.

Description

Relay {RELAY}

The present invention relates to a relay, and more particularly, to a relay that prevents vibrations of a movable contact when a current is applied, thereby preventing noise from being generated during operation.

In general, a relay is a device having a current opening / closing function for controlling a driving device such as a motor, and is a device for controlling operations such as starting and stopping of a motor and a driving device as well as controlling low- .

The relay supplies and cuts the current by contacting or disconnecting the fixed contact connected to the external load with the movable contact driven by the electromagnetic force. .

1, Sectional view of the EV relay, and Fig. 2 is a schematic view showing a state in which the movable contact of the conventional EV relay is shaken by the electromagnetic repulsive force.

1 and 2, a conventional EV-relay 10 is provided with components such as a fixed contact 12, a movable contact 13, and a contact pressure spring 14 inside a housing 11 do.

The housing 11 seals the entire driving range of the fixed contact 12, the movable contact 13, the shaft 15 and the contact pressure spring 14. The housing 11 closes the inner wall of the upper case 11a from the lower case 11b, And the upper case 114a and the lower case 114b are hermetically sealed by the hermetic sealing member 17 provided outside.

The stationary contactor 12 is provided on the upper side of the housing 11 and is connected to an external load such as a motor and a driving device. Further, the movable contactor 13 is driven in the vertical direction to contact or disconnect the fixed contactor 111 to switch the current to supply or cut off to the external load, and to contact the fixed contactor 12 by the contact spring 14 The contact state is maintained at a predetermined pressure or higher.

An actuator 20 is provided under the EV-relay 10 and includes an excitation coil 21, a coil bobbin 22, a fixed core 23, a movable core 24, a return spring 25, (Not shown).

The exciting coil 21 generates an electromagnetic force by an electric signal to generate a driving force between the fixed iron core 23 and the movable iron core 24. The fixed iron core 23 and the movable iron core 24 are connected to the exciting coil 21, And the return spring 25 is positioned between the fixed core 23 and the movable core 24. The movable core 24 is fixed to the fixed core 23 by a spring.

The shaft 26 axially passes through the center of the fixed iron core 23, the return spring 25 and the movable iron core 24 and is engaged with the contact spring 14 and the movable contact 13.

In the conventional relay 10 constructed as described above, when the current flows through the exciting coil 21, the actuator 20 operates, and by the suction force generated between the movable iron core 24 and the fixed iron core 23, (24) is raised.

At this time, the shaft 26 connected to the movable iron core 24 also rises, and the movable contactor 13 and the fixed contactor 12 come into contact with each other while compressing the contact pressure spring 14. [

Through this process, the ON-operation of the EV-relay proceeds.

When the electric current applied to the exciting coil 21 is cut off, the suction force between the movable iron core 24 and the fixed iron core 23 is lost, and the movable contactor 13 is brought into contact with the stationary contactor 12, the EV-relay is turned off.

However, when the current flows through the stationary contactor 12 and the movable contactor 13, the conventional relay 10 operated in the above-described manner causes the electromagnetic interference between the stationary contactor 12 and the movable contactor 13 There is a problem that vibration occurs in the movable contactor 13.

Further, since vibration occurs in the movable contactor 13, there is a problem that friction occurs between the movable contactor 13 and the fixed contactor 12 and high frequency noise is generated.

In addition, since the high frequency noise is generated, there is a problem that the use of the relay 10 is inconvenient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a relay that prevents noise from occurring during operation by preventing vibration of a movable contact upon application of a current.

SUMMARY OF THE INVENTION The object of the present invention described above is to provide a fixed contact connected to an external load; A movable contact which is brought into contact with or separated from the stationary contactor to supply or cut off current to the external load; And a contact spring for keeping the contact state between the fixed contact and the movable contact, wherein the magnetic contact is provided on the upper surface of the movable contact and the lower surface is provided with a magnet member for generating a magnetic force to pull the magnetic substance And a relay which is characterized in that it is characterized in that it is a relay.

Further, the magnetic body is characterized by being a washer.

And the length of the magnetic substance in the horizontal direction is shorter than the length of the magnet member in the horizontal direction.

Further, a protrusion is formed in a lower portion of the magnet member so that one end of the contact spring is inserted.

As described above, according to the present invention, the relay is provided with a magnetic body on the upper surface of the movable contactor, and the magnet member is provided on the lower surface of the movable contactor to increase the contact strength between the movable contactor and the fixed contactor by the magnetic force generated through the magnetic body and the magnet member. So that the movable contactor is prevented from vibrating even if an overcurrent is applied.

Further, since the contact of the movable contactor with the fixed contactor is maintained by preventing the vibration of the movable contactor, the reliability of the operation of the relay is improved.

In addition, since the vibration of the movable contact is prevented, the occurrence of noise due to the vibration of the movable contact upon contact between the movable contact and the fixed contact is prevented, thereby improving convenience in use.

1 is a schematic configuration diagram showing a configuration of a conventional relay;
2 is a conceptual diagram showing a state in which a movable contact constructed in a conventional relay is vibrated;
3 is a front view showing a state in which a magnetic substance and a magnet member are provided in a movable contactor provided in a relay according to a first embodiment of the present invention;
4 is a perspective view showing a state in which a movable contact provided in a relay according to a first embodiment of the present invention is in contact with a fixed contact.
5 is a sectional view showing a relay according to a first embodiment of the present invention;
6 is a cross-sectional view showing a relay according to a second embodiment of the present invention;

Hereinafter, a relay according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a front view showing a state in which a magnetic substance and a magnet member are provided in a movable contact provided in a relay according to a first embodiment of the present invention, FIG. 4 is a front view of the movable contact of the relay according to the first embodiment of the present invention, FIG. 5 is a perspective view showing a relay according to the first embodiment of the present invention, and FIG. 6 is a perspective view showing a state where the magnetic contact body is brought into contact with the movable contactor provided in the relay according to the second embodiment of the present invention. And a magnet member.

3 and 5, the relay 100 according to the present invention includes a stationary contactor 103, a movable contactor 105 (not shown) in the housing 101 composed of an upper case 101a and a lower case 101b, And a contact pressure spring 107, and the like.

The housing 101 is made of a heat resistant material and is configured to seal the fixed contact 103, the movable contact 105 and the contact pressure spring 107. The upper case 101a and the lower case 101b are vertically connected.

An extension portion 109 extending upwardly from the lower case 101b along the inner wall of the upper case 101a is in contact with the inner side surface of the upper case 101a and the hermetic member 111, The upper case 101a and the lower case 101b are air-tightly joined together.

The actuator 120 is further provided with an actuator 120. The actuator 120 includes an exciting coil 121, a coil bobbin 122, a fixed core 123, a movable core 124, a return spring 125, And a shaft 126 that moves up and down.

The exciting coil 121 generates an electromagnetic force when a current is applied to generate a driving force so that the fixed core 123 and the movable core 124 are closely contacted with each other. Are arranged so as to come into contact with or separate from each other inside the exciting coil (121).

The return spring 125 is positioned between the fixed core 123 and the movable core 124 to provide an elastic force when the movable core 124 is driven in the vertical direction, .

The shaft 126 penetrates the center of the fixed core 123, the return spring 125 and the movable core 124 in the axial direction and is engaged with the contact spring 107 and the movable contact 105 do. Therefore, the movable contact 105 is moved by the driving force of the movable iron core 124 by the electromagnetic force to come into contact with the fixed contact 103 or to be separated from the fixed contact 103.

On the other hand, a magnetic substance 130 is provided on the upper surface of the movable contactor 105, and a magnet member 140 is provided on the lower surface.

The magnetic body 130 may have a rectangular shape such as a washer having a magnetic force when a current is applied thereto.

The magnet member 140 generates a magnetic force toward the magnetic body 130 to increase the contact strength between the movable contactor 105 and the fixed contactor 103 in a configuration that generates magnetic force regardless of whether a current is applied or not.

The contact strength between the movable contactor 105 and the fixed contactor 103 is increased through the magnetic body 130 and the magnet member 140 to prevent the vibration of the movable contactor 105 due to the application of the current .

More specifically, if a current is applied to the exciting coil 121, the shaft 126 connected to the movable iron core 124 moves so that the movable iron core 124 contacts the fixed iron core 123 And moves upward.

At this time, the movable contactor 105 connected to the shaft 126 also moves upward and comes into contact with the fixed contactor 103. Even after the movable contactor 105 is brought into contact with the fixed contactor 103, The contact member 126 is continuously elevated to a certain extent while compressing the contact pressure spring 107 so that the magnetic member 130 connected to the shaft 126 is positioned on the upper surface of the movable contactor 105, And moves upward.

During the on-operation of the relay 100 and the force of the actuator 120 is continued, the shaft 126 can not return to its original position and remains in a fixed state.

At this time, mutual pulling force is generated between the magnetic body 130 and the magnet member 140 through magnetic force. The magnetic body 130 is connected to the shaft 126 receiving the force of the actuator 120 So that there is a force to finally pull the magnet member 140 upward.

4, when an electric current is applied, an electromagnetic repulsive force is generated in the direction D1. However, when a force for pulling the magnet member 140 upward is applied in the direction D2, A force in the direction D2 acts to increase the contact strength with which the movable contactor 105 contacts the stationary contactor 103 and prevent the movable contactor 105 from being vibrated by the electromagnetic repulsion force .

The magnetic member 130 has a horizontal length shorter than a horizontal length of the magnet member 140 so that a force pulled through the magnet member 140 acts on the entirety of the magnetic member 130.

6, protrusions 141 'may be further formed on the magnet member 140' of the relay 100 according to the second embodiment of the present invention so as to protrude downward.

Therefore, when the contact pressure spring 107 is positioned below the magnet member 140, the upper end is fitted into the protrusion 141 ', thereby pressing the spring in the opposite direction from the fixed position by the pressure through the shaft 126 Thereby being prevented from being separated.

In the present invention configured as described above, the magnetic substance 130 is provided on the upper surface of the movable contactor 105, and the magnet member is provided on the lower surface of the movable contactor 105 to be generated through the magnetic member 130 and the magnet member By increasing the contact strength between the movable contactor 105 and the fixed contactor 103 by the magnetic force applied to the movable contactor 105, the movable contactor 105 is prevented from vibrating even if an overcurrent is applied.

Further, since the contact of the movable contactor 105 with the fixed contactor 103 is maintained by preventing the vibration of the movable contactor 105, the reliability of the operation of the relay 100 is improved.

In addition, since the vibration of the movable contactor 105 is prevented, the occurrence of noise due to the vibration of the movable contactor 105 during contact between the movable contactor 105 and the fixed contactor 103 is prevented, thereby improving convenience in use.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not for the purpose of limitation. Therefore, the above description does not limit the scope of the present invention, which is determined by the limitations of the utility model registration claims set forth below.

10, 100: relays 11, 101: housing
12, 103: fixed contacts 13, 105: movable contacts
14, 107: Contact spring 15: Shaft
16, 109: extension part 17, 111: airtight member
20, 120: Actuator 21, 121: Exciting coil
22, 122: coil bobbin 23, 123: fixed iron core
24, 123: movable iron core 25, 125: return spring
26, 126: shaft 101a: upper case
101b: lower case 130: magnetic substance
140, 140 ': magnet member 141': protrusion

Claims

A fixed contact connected to an external load; A movable contact which is brought into contact with or separated from the stationary contactor to supply or cut off current to the external load; And a contact spring for maintaining the contact state of the fixed contact and the movable contact,
Wherein a magnetic member is provided on an upper surface of the movable contact, and a magnet member is provided on a lower surface of the movable contact to generate a magnetic force to pull the magnetic member.

The method according to claim 1,
And the magnetic body is a washer.

The method according to claim 1,
And the horizontal length of the magnetic body is shorter than the horizontal length of the magnet member.

The method according to claim 1,
And a protrusion is formed in a lower portion of the magnet member so that one end of the contact spring is inserted.