KR20070061680A - Relay - Google Patents

Abstract

A relay is provided to prevent terminal contact noise by connecting first and second fixing terminals with sliding movement of a movable terminal. A slider(30) is slid on a base plate(10), and has a movable terminal(32) at a side and a metal plate(33) at the front. An electromagnet(40) is installed on the base plate in front of the slider. A leaf spring(50) is fixed to the base plate and a rear end of the slider at both ends thereof. A case(20) covers an upper portion of the base plate to accommodate the slider and the electromagnet, and has first and second fixing terminals which are connected to each other by the movable terminal.

Description

Relay {relay}

1 is a view schematically showing a conventional relay structure,

2 is a front sectional view of a relay according to the present invention;

3 is a cross-sectional view taken along the line III-III of FIG. 2, and a side cross-sectional view of FIG. 3;

4 is a perspective view of a slider which is one component of the present invention;

5 and 6 are plan views of the present invention, Figure 5 is a state diagram before operation, Figure 6 is a state diagram of operation.

** Description of the symbols for the main parts of the drawings **

10: base plate, 20: case,

22a, 22b: 1st and 2nd fixed terminal, 30: slider,

32: movable terminal, 40: electromagnet,

50: leaf spring.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to relays used in various electrical circuits, and more particularly to relays in which operating noise can be reduced.

As is well known, a relay installs an electromagnet in a circuit into which a control signal is input, and installs a movable contact that connects a power supply to a load in close proximity thereto, and when the current is applied to the control circuit, the electromagnet is magnetized to attract the movable contact. It is a kind of switch that connects the circuit so that current can be supplied to the load.

1 shows a schematic diagram of a relay. As described above, the fixed terminal 3 and the movable terminal 4 are installed in close proximity to the electromagnet 2 fixed to the body 1, and the movable terminal 4 is hinged and fixed to the body 1. The leaf spring 5 is connected to the body 1 so that the fixed terminal 3 and the movable terminal 4 are normally spaced apart by the leaf spring 5.

Then, when a current is supplied to the electromagnet 2, an operating current is supplied to the electric device to be operated by pulling the movable terminal 4 by contact with the fixed terminal 3 by the magnetic force generated at this time, and to the electromagnet 2 When the supplied current is cut off, the magnetic force is dissipated, and the movable terminal 4 is re-spaced from the fixed terminal 3 by the restoring force of the leaf spring 5.

However, in the conventional relay having the above structure, noise is inevitably generated during relay operation. That is, when the operation terminal 4 is in contact with the fixed terminal 3 during operation, the collision noise is generated, such relay operation noise may cause a deterioration of the marketability of the device in some cases.

For example, in an automobile using a large number of relays, the relay operation noise generated every time a device is operated is a cause of deterioration of the quietness of the vehicle, thereby degrading the merchandise of the automobile.

Therefore, in the related art, the method of double the case of the relay was used to cut off the contact noise between the terminals. However, in this case, the size of the relay is increased, so that it is not spatially efficient to construct the relay box, and the operation noise of the relay itself is There is a problem that does not disappear.

Accordingly, the present invention has been made in view of the above-described matters, and an object thereof is to provide a relay such that terminal contact noise does not occur during operation.

The present invention for achieving the above object,

Base plate;

A slider which is slidably moved from the base plate, a movable terminal is provided on a side surface, and a metal plate is provided on a front surface of the slider;

An electromagnet installed in front of the slider in the base plate;

Leaf springs fixed at both ends of the base plate and the rear surface of the slider;

The case is covered with an upper portion of the base plate to accommodate the slider and the electromagnet, and the case is provided with a fixed terminal connected to the movable terminal when the slider is pulled by the electromagnet provided on the side.

That is, in the relay according to the present invention, the terminal contact noise is hardly generated because the current is supplied by connecting the fixed terminals while the movable terminal slides during operation.

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

FIG. 2 is a front sectional view of the relay according to the present invention, and FIG. 3 is a sectional view taken along line III-III of FIG.

According to the present invention, a slider 30 and an electromagnet 40 are installed in a relay body made of a case 20 having a base plate 10 as a floor and covering the base plate 10 to form a rectangular parallelepiped box. ) Is provided with a movable terminal 32, and the case 20 is provided with a fixed terminal 22 connected by the movable terminal (32).

The base plate 10 is a rectangular plate member, and a part 11 of the bottom thereof protrudes upward to form a guide 11.

In addition, a guide 21 having the same shape corresponding to the guide 11 is formed on the upper surface of the case 20.

On the contrary, guide ribs 31 forming grooves are formed on the upper and lower surfaces of the slider 30 so as to allow the guides 11 and 21 to be inserted therein.

That is, the slider 30 is installed in a state where the guides 11 and 21 are inserted between the pair of guide ribs 31 formed on the upper and lower surfaces thereof, and thus the slider 30 can be slid forward and backward along the guides 11 and 21. It is supposed to be.

On the other hand, the side of the slider 30, as shown in Figures 2 to 4, is provided with a movable terminal 32, the movable terminal 32, both sides of the flat metal plate from the body of the slider 30 It is bent toward the side of the case 20 and its end is bent toward the slider 30 so that the center part is fixed to the slider 30 by rivets or screws.

Then, the other end of the leaf spring 50, one end of which is fixed to the base plate 10, is fixed to the rear surface of the slider 30.

On the other hand, the inner side of the case 20 is provided with a fixed terminal 22 which the movable terminal 32 is in contact or spaced apart, the fixed terminal 22 is the first fixed terminal (22a) and the second fixed terminal 22b. (See FIG. 5)

The first and second fixed terminals 22b are connected to the power supply side and the electric device side, respectively, so that current is supplied to the electric device when they are connected by the movable terminal 32.

On the other hand, before the slider 30 is operated, the front end of the movable terminal 32 is in contact with the second fixed terminal 22b, and the rear end is not in contact with the first fixed terminal 22a. When the slider 30 moves forward, the positions of the first and second fixed terminals 22a and 22b are set such that the first fixed terminal 22a comes into contact with the rear end of the movable terminal 32.

At this time, the second fixed terminal 22b is larger than the moving distance of the slider 30 so that the front end of the movable terminal 32 can always be in contact with the second fixed terminal 22b regardless of the movement of the slider 30. It is manufactured in long length.

On the other hand, the front plate of the slider 30 is provided with a metal plate 33.

The electromagnet 40 is installed at a position on the base plate 10 at a position spaced apart from the metal plate 33 by a predetermined distance.

The electromagnet 40 surrounds the circular metal member 42 and the circular metal member 42 supported at the front position of the metal plate 33 by the power supply terminal and the support 41, and both ends are the power supply terminal. A coil 43 connected to the support 41 and a metal plate 44 having a lower end fixed to the base plate 10 while being in close contact with the front surface of the circular metal member 42.

Hereinafter, the operation of the relay according to the present invention will be described with reference to FIGS. 5 and 6.

5 is a state before the relay operation, the slider 30 is located behind the base plate 10, the leaf spring 50 is not operated. In this state, as described above, the front end of the movable terminal 32 is in contact with the long first fixed terminal 22b, but the rear end is not in contact with the second fixed terminal 22a. No electric current is supplied to the electric device because 22a and 22b are not connected. (The rear end of the movable terminal 32 in contact with the drawing 22c is no charge.) As a terminal, it is manufactured to have the same thickness as the fixed terminal and serves to support the rear end of the movable terminal in a non-operating state of the relay, and if the structure is connected to the first fixed terminal 22a, the sliding of the movable terminal It is also possible to remove the minute noise generated when moving.)

On the other hand, when the control current is supplied to the power supply terminal and the support 41 and the current flows in the coil 43, the circular metal member 42 and the metal plate 44 in contact therewith become magnetized to become an electromagnet 40. .

Therefore, as shown in FIG. 6, the metal plate 33 is attracted by the magnetic force of the electromagnet 40. Since the metal plate 33 is fixed to the front of the slider 30, the slider ( 30 moves to the front of the base plate 10.

Therefore, the movable terminal 32 moves forward integrally with the slider 30 so that the rear end is brought into contact with the first fixed terminal 22a, so that the first and second fixed terminals (1, 2) are connected via the movable terminal 32. 22a and 22b are connected to supply current from the power supply to the electrical device.

In other words, power is supplied by the relay.

Afterwards, when the control current supplied to the coil 43 is cut off, the electromagnet 40 loses its magnetic force. As shown in FIG. 5, the slider 30 moves back to the rear by the restoring force of the leaf spring 50. As a result, the movable terminal 32 is returned to the rear, and the first and second fixed terminals 22a and 22b are electrically disconnected.

As described above, the relay terminal 32 normally performs a function as a relay, and the movable terminal 32 connecting the first and second fixed terminals 22a and 22b slides integrally with the slider 30 and the first and second fixed terminals. The electrical connection of the 22a and 22b prevents the contact (collision) noise of the contact as in the conventional relay.

Meanwhile, in the present invention, the metal plate 33 provided in front of the slider 30 may be replaced with a permanent magnet. In this case, the polarity of the permanent magnets facing the electromagnet 40 is opposite to the polarity of the electromagnet 40 when it is magnetized, so that the attraction force must be applied to each other.

In this case, since the attraction force between the electromagnet 40 and the permanent magnet becomes stronger, the magnetic force necessary to move the slider 30 is satisfied even if the magnetic force generated in the electromagnet 40 is weakened, so that the coil 43 constituting the electromagnet 40 is provided. It is possible to reduce the number of turns. Thus, it is possible to reduce the size of the relay.

In addition, in the present invention, the movable terminal 32 is installed on both sides of the slider 30, and the first and second fixed terminals 22a and 22b corresponding thereto are also installed on both sides of the case 20. Two relays can be configured.

In addition, when the two relays are configured as described above, adjusting the installation position of the first and second fixed terminals installed on both sides (the first and second fixed terminals on one side are connected by the movable terminal at the position before the slider operation). Position, and the first and second fixed terminals on the other side are connected by the movable terminal in the position after the slider is operated.) So that both relays operate in opposite directions, that is, when one relay is turned on, the other relay You can also configure a circuit that turns off and turns on the other relay when one relay is off.

As described above, according to the present invention, the movable terminal is slidably moved to connect the fixed terminals, so that noise is hardly generated during contact between the terminals.

Therefore, the size of the relay can be reduced by not having to add a separate case for noise isolation.

In addition, it is possible to reduce the coil winding of the electromagnet by replacing the metal plate mounted on the front of the slider with a permanent magnet, which also acts as an element that can reduce the size of the relay.

On the other hand, there are advantages in that two relays may be formed by installing movable terminals on both sides of the slider.

Claims (5)

A base plate 10; A slider 30 which is slidably moved from the base plate 10, a movable terminal 32 is provided on a side thereof, and a metal plate 33 is provided on a front surface thereof; An electromagnet 40 installed at the front of the slider 30 in the base plate 10; Plate springs 50 having both ends fixed to the rear surfaces of the base plate 10 and the slider 30; It is covered by an upper portion of the base plate 10 so that the slider 30 and the electromagnet 40 is accommodated, and connected by the movable terminal 32 when the slider 30 is pulled by the electromagnet 40. The first and second fixed terminals (22a, 22b) to be configured to include a case (20) provided on the side. According to claim 1, The slider 30 is a guide 11, 21 formed in the base plate 10 and the case 20 is inserted between a pair of guide ribs 31 formed on the upper and lower surfaces The relay, characterized in that the sliding movement forward and backward along the guides (11, 21). The relay of claim 1, wherein a permanent magnet is attached to the front of the slider (30) instead of the metal plate (33). The method of claim 1, wherein the movable terminal 32 is provided on both sides of the slider 30, the first and second fixed terminals 22a, 22b corresponding to both sides of the case 20 Relay, characterized in that provided. 5. The method of claim 4, wherein the first and second fixed terminals on one side of the slider 30 are installed at positions connected by the movable terminals at positions before the slider operation, and the first and second fixed terminals on the opposite side are operated by the slider. Relay, characterized in that installed in the position connected by the movable terminal in the rear position.

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