KR20190048793A - Latching Relay Apparatus - Google Patents

Abstract

The present invention relates to a latching relay apparatus which is continuously and electrically connected or cut off by initial power application. According to the present invention, the latching relay device comprises: a fixed contact piece having at least one fixed contact point; a movable contact piece assembly having at least one movable contact point disposed at a position opposite to the fixed contact point; and an actuator for providing a driving force to the movable contact piece assembly for conduction between the movable contact point and the fixed contact point, wherein the actuator includes: a solenoid coil; a yoke disposed on both side surfaces of the solenoid coil and having magnetic properties of different polarities at both ends by a magnetic field formed by the solenoid coil; a latch positioned between both ends of the yoke and swinging by the magnetic properties of different polarities at both ends of the yoke; and a fixed magnet coupled to the latch to maintain a position of the latch after swinging.

Description

[0001] LATCHING RELAY APPARATUS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay device, and more particularly, to a latching relay device in which ON-OFF operation of a latching relay device is maintained even when temporary power is applied to a solenoid coil.

Recently, eco-friendly automobiles such as hybrid cars and electric cars are attracting attention due to energy depletion and environmental pollution problems. Hybrid cars are largely classified as mild hybrid cars and plug-in hybrid cars depending on their charging method. A mild hybrid vehicle is a hybrid vehicle that charges a battery using a part of energy generated from an internal combustion engine. A plug-in hybrid vehicle is a hybrid vehicle that receives energy from an external commercial power source to charge the battery.

A mild hybrid vehicle is a next-generation vehicle system that uses both internal combustion engines and electric motors to reduce fuel consumption and emissions compared to conventional vehicles. The mild hybrid system, which operates at a relatively low voltage of 48V, is not only superior in terms of cost, but also has the advantage of driving electric components using high output power. Particularly, there is an increasing interest in relays that are installed in the battery system of a mild hybrid vehicle to supply the main power to the motor, electrical components, or shut off the power.

On the other hand, it is pointed out that the conventional relays have to be supplied with continuous control power to the coils in order to maintain the ON-OFF operation, which is not compatible with the mild hybrid vehicle for the purpose of fuel efficiency reduction.

On the other hand, the high reliability of the relay and the extension of its life are important factors in the product characteristics, which can be realized by the arc extinguishing ability which can quickly release the heat caused by the arc generated when the relay is opened and closed. However, conventionally, a method of increasing the distance between the contact points is used to extinguish the arc. However, this method has a problem in that it is difficult to apply to a mild hybrid system in which the size of the product is increased, which requires miniaturization.

Korean Patent No. 10-1241221, " Charging Device for Mild Hybrid Vehicle "

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

It is an object of the present invention to provide a latching relay device which is capable of operating with low power by maintaining a constant energization or interruption state by initial power supply and contributing to improvement of fuel economy of a vehicle.

SUMMARY OF THE INVENTION An object of the present invention is to provide a latching relay device having a stable current carrying capability by increasing a contact pressure between a movable contact and a fixed contact.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a relay device having a structure capable of extinguishing an arc generated upon opening and closing between a fixed contact and a movable contact.

Other objects and advantages of the present invention will be described hereinafter and will be understood by the embodiments of the present invention. Further, objects and advantages of the present invention can be realized by the means and the combination shown in the appended claims.

The present invention is embodied by the following embodiments in order to achieve the above object.

A low-power actuator for maintaining the on-off state of a latching relay device by an initial power supply according to one side, the actuator comprising: a solenoid coil; A yoke disposed on both side surfaces of the solenoid coil and magnetized at opposite ends thereof by magnetic fields formed on the solenoid coil; A latch which is positioned between both ends of the yoke and swings by magnetic forces of opposite polarities at both ends of the yoke; And a fixed magnet coupled to the latch to maintain the position of the latch after the swing.

The latch includes: a first metal plate coupled to an upper end; And a second metal plate coupled to a lower end of the first metal plate, wherein the first metal plate and the second metal plate have magnetizations of different polarities.

Wherein both ends of the yoke having magnetism of opposite polarity are located between both ends of the first metal plate and the opposite ends of the second metal plate so as to attract the ends of the metal plate having the same polarity, And the plate is pushed out to swing the latch.

When the direction of the magnetic field formed on the solenoid coil is reversely reversed, the magnetism formed at both ends of the yoke is reversely reversed so that the attracted metal plate is pushed out And the metal plate being pushed is pulled to re-swing the latch.

Wherein the latching relay device comprises: a fixed contact piece having at least one fixed contact point; A movable contact assembly having at least one movable contact disposed at a position opposing the fixed contact; And an actuator for providing a driving force to the movable contact assembly for energization between the movable contact and the fixed contact, wherein the actuator comprises: a solenoid coil; A yoke disposed on both side surfaces of the solenoid coil and magnetized at opposite ends thereof by magnetic fields formed on the solenoid coil; A latch which is positioned between both ends of the yoke and swings by magnetic forces of opposite polarities at both ends of the yoke; And a fixed magnet coupled to the latch to maintain the position of the latch after the swing.

Wherein the movable contact piece assembly includes first and second movable contact pieces disposed to face each other with the actuator interposed therebetween.

The latching relay device further includes a lever coupled to the latch and moving to a top dead center or a bottom dead center according to a swing or a re-swing of the latch.

The latching relay device may further include a slider that pushes up or pulls down the first and second movable contact pieces as the lever moves to the top dead center or the bottom dead center.

When the lever moves to the top dead center, the slider pushes up the first and second movable contact pieces upward to energize the fixed contact and the movable contact, and when the lever moves to the bottom dead center, The two movable contact pieces are pulled down so that the fixed contact and the movable contact are opened.

The latching relay device may further include an otic spring for applying tension at a lower end of the first and second movable contact pieces when the fixed contact and the movable contact are energized.

The latching relay device may further include a pair of side magnet members for extinguishing an arc generated when the movable contact and the fixed contact are opened.

The pair of side magnet members are disposed so as to face each other with a different polarity, and the movable contact and the stationary contact are disposed between the pair of side magnet members.

The present invention has the following effects with the above-described configuration.

INDUSTRIAL APPLICABILITY The present invention has the effect of contributing to the improvement of the fuel efficiency of a vehicle by being able to operate with low power by maintaining the constant energization or interruption state by the initial power supply.

The present invention has the effect of increasing the contact pressure between the movable contact and the stationary contact to provide stable energizing performance.

The present invention provides a simple structure capable of extinguishing an arc generated when the movable contact is opened and closed between the fixed contact and the movable contact, thereby providing a high reliability and a life extension effect of the relay as well as miniaturization.

1 is an exploded perspective view showing a main configuration of a latching relay device according to an embodiment.
2 is a partial cross-sectional view illustrating the structure of an actuator according to an embodiment.
3 is a view for explaining a state in which the lever moves to the top dead center according to the driving of the actuator according to the embodiment.
4 is a view for explaining a state in which the lever moves to the bottom dead point according to the driving of the actuator according to the embodiment.
5 is a cross-sectional view of the latching relay device for explaining a state in which the contact is energized as the lever moves to the top dead center as shown in FIG.
6 is a cross-sectional view of the latching relay device for explaining a state in which the contact is opened as the lever moves to the bottom dead center as shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more fully describe the present invention to those skilled in the art. Furthermore, although specific terms have been used in the drawings and specification of the present invention, they have been used for the purpose of describing the present invention only and not for limiting the scope of the present invention described in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

In the present specification, the singular forms include plural forms unless otherwise specified in the specification. &Quot; comprises " and / or " comprising " when used in this specification is taken to specify the presence or absence of one or more other components, steps, operations and / Or add-ons.

Hereinafter, the latching relay apparatus of the present invention will be described in detail with reference to the drawings.

1 is an exploded perspective view showing a main configuration of a latching relay device according to an embodiment.

The latching relay device 1 is a relay mounted on a 48V battery system of a mild hybrid vehicle according to an embodiment to supply main electric power of a battery to a motor, electrical parts or cut off electric power. The latching relay apparatus 1 according to the embodiment can maintain ON / OFF operation of the latching relay apparatus 1 even if power is temporarily applied to the solenoid coil only once, so that continuous power supply is not required. Therefore, the fuel consumption of the mild hybrid vehicle equipped with the latching relay device 1 according to the embodiment can be effectively improved.

1, the latching relay apparatus 1 includes a fixed contact piece 50 having at least one fixed contact 501; A movable contact assembly (41, 42) having at least one movable contact (401) disposed at a position opposing the fixed contact (501); An actuator (10) for providing a driving force to the movable contact assembly (41, 42) for energization between the movable contact (401) and the fixed contact (501); A housing (20); And a cover (30).

The movable contact piece assemblies 41 and 42 include a first movable contact piece 41 and a second movable contact piece 42 which are disposed facing each other with the actuator 10 interposed therebetween. Each of the first movable contact piece 41 and the second movable contact piece 42 includes at least one movable contact point 401 disposed at a position opposite to the fixed contact point 501.

The first movable contact piece 41 and the second movable contact piece 42 are lifted by the driving force of the actuator 10 to move the first bus bar 61 and the second bus bar 62 apart from each other, 401 and the fixed contact 501 are electrically connected to each other through the first movable contact piece 41, the fixed contact piece 50 and the second movable contact piece 42, The current flows to the second bus bar 62, and the latching relay device 1 is turned on. A detailed description will be given below with reference to FIG.

FIG. 2 is a partial sectional view for explaining the structure of the actuator according to the embodiment, FIG. 3 is a view for explaining a state in which the lever moves to the top dead center according to the driving of the actuator according to the embodiment, Fig. 5 is a view for explaining a state in which the lever is moved to the bottom dead center in accordance with the driving of the actuator; Fig.

2, the actuator 10 includes: a bobbin 16 having a hollow therein; a solenoid coil 13 wound on the bobbin 16; Yokes (14) positioned on both sides of the solenoid coil (13) and magnetized at opposite ends (141, 142) by magnetic fields formed on the solenoid coil (13); A latch 12 which is located between both ends 141 and 142 of the yoke 14 and swings or re-swings by the magnetic poles of the opposite ends 141 and 142 of the yoke 14; A lever 19 coupled to the latch 12 to move to a top dead center or a bottom dead center according to the swing or re-swing of the latch 12; And a fixed magnet 15 coupled to the latch 12 to maintain the position of the latch 12 after the swing.

The latch (12) includes: a first metal plate (111) coupled to an upper end; And a second metal plate 112 coupled to a lower end of the first metal plate 111. According to an embodiment, the first metal plate 111 and the second metal plate 112 have different polarities of magnetism.

Both ends 141 and 142 of the yoke 14 having magnetic properties of different polarities are positioned between both ends of the first metal plate 111 and both ends of the second metal plate 112 So that the metal plate 11 having the same polarity is pulled and the metal plate 11 having the other polarity is pushed out to swing or re-swing the latch 12. That is, when the first metal plate 111 and the second metal plate 112 are magnetically coupled to both ends 141 and 142 of the yoke 14, the latch 12 is engaged with the latch center fixing portion 121).

According to the embodiment, the stationary magnet 15 can maintain the position of the latch 12 after the swing with magnetic force. Therefore, since the position of the latch 12 is fixed by the stationary magnet 15 when the initial power is applied to the solenoid coil 13 and the latch 12 swings, the solenoid coil 13 can be operated without applying additional power. The energized state can be maintained and the latching relay apparatus 1 can be operated with the minimum power.

The magnetic poles of the both ends 141 and 142 of the yoke 14 which becomes the electromagnet by the magnetic field formed on the solenoid coil 13 may be different according to the power source direction applied to the solenoid coil 13 <-> S, S <-> N).

3, the left end 141 of the yoke 14 temporarily has an S pole, the right end 142 of the yoke 14 has an N pole, and the first metal plate 111 has an N pole Magnetic attraction and attraction between the left end 141 of the yoke 14 and the first metal plate 111 and the magnetic force of the second metal plate 112 when the second metal plate 112 has the S- And the repulsive force acts. The right end 142 of the yoke 14 and the first metal plate 111 are acted upon by the repulsive force and the attraction force acts on the second metal plate 112. [ Accordingly, the latch 12 swings, and the lever 19 moves to the top dead center (TDC) according to the swing of the latch 12. According to the embodiment, the stationary magnet 15 can maintain the position of the latch 12 after the swing with magnetic force.

A three-phase wire (not shown) is connected to the solenoid coil 13 so that the direction of the magnetic field is reversely changed in accordance with the power application direction. When the direction of the magnetic field formed on the solenoid coil 13 is reversed, the magnetism formed at both ends of the yoke 14 is reversely reversed so that the metal plate that has been pulled out is pulled out and pulled out, .

3, the left end 141 and the right end 142 of the yoke 14 are formed as S poles and N poles, respectively, temporarily by the power source applied to the solenoid coil 13, The left end 141 of the yoke 14 is connected to the N pole and the right end 142 of the yoke 14, Is switched to the S-pole.

4, the left end 141 of the yoke 14 pushes out the first metal plate 111 pulled by the magnetic force (attraction force) between the first metal plate 111 and the first metal plate 111 The second metal plate 112, which is pushed by the repulsive force, is pulled because it is changed into the attractive force. In addition, the first metal plate 111, which is pushed by the right end 142 of the yoke 14, is pulled by the attraction force, and the second metal plate 112 pulled by the yoke 14 is repulsively acted. Accordingly, the latch 12 re-swings, and the lever 19 moves from the TDC to the BDC as the latch 12 re-swings.

5 is a cross-sectional view of the latching relay device for explaining a state in which the contact is energized as the lever moves to the top dead center as shown in FIG.

3, both ends 141 and 142 of the yoke 14 positioned between the first metal plate 111 and the second metal plate 112, which have magnetism of mutually opposite polarities, 142 are caused by the current applied to the solenoid coil 13 and become magnetized, the latch 12 swings and the lever 19 moves to the TDC due to the swing of the latch 12.

5, when the lever 19 moves to the top dead center, the slider 18 pushes up the first movable contact piece 41 and the second movable contact piece 42 upward, The movable contact 401 is energized.

According to the embodiment, the latch relay device 1 further includes dead springs 70a and 70b for applying a tension to the lower ends of the first movable contact piece 41 and the second movable contact piece 42 . The first offset spring 70a applies additional tension to the first movable contact piece 41 at the lower end and the second offset spring 70b at the lower end of the second movable contact piece 42, The first movable contact piece 41 and the second movable contact piece 42 are strongly supported and the contact pressure between the stationary contact 501 and the movable contact 401 is increased to stabilize the electrification performance.

The first movable contact piece 41 and the second movable contact piece 42 are lifted by the driving force of the actuator 10 to move the first bus bar 61 and the second bus bar 62 apart from each other, 401 and the fixed contact 501 are electrically connected to each other and are connected to each other through the first movable contact piece 41, the fixed contact piece 50 and the second movable contact piece 42, The current flows from the first bus bar 62 to the second bus bar 62 so that the latching relay device 1 is turned on. According to another embodiment, the current flows from the second bus bar 62 to the first bus bar 61 so that the latching relay device 1 can be turned on.

6 is a cross-sectional view of the latching relay device for explaining a state in which the contact is opened as the lever moves to the bottom dead center as shown in FIG.

According to the embodiment, when the current application direction is reversely switched to the solenoid coil 13, the magnetism formed at both ends of the yoke 14 is also reversed so that the metal plate pulled out is pulled out, (12).

4 and 6, when the lever 19 is moved to the bottom dead center BDC according to the re-swing of the latch 12, the slider 18 moves in the first and second movable contact pieces 41 and 42, The movable contact piece 42 is pulled down so that the fixed contact point 501 and the movable contact point 401 are opened. When the movable contact point 401 and the fixed contact point 501 are opened, the first movable contact piece 41, the fixed contact piece 50 and the second movable contact piece 42 are separated from each other and the first bus bar 61 The current flowing from the second bus bar 62 to the second bus bar 62 is cut off and the latching relay device 1 is turned off.

According to the embodiment, if the stationary contact 501 and the movable contact 401 are mutually opened, an arc may be generated. 6, the latching relay apparatus 1 further includes a pair of side magnet members 81 and 82 for extinguishing an arc generated when the movable contact 401 and the stationary contact 501 are opened can do.

The movable contact point 401 and the stationary contact point 501 are disposed between the pair of side magnet members 81 and 82. The pair of side magnet members 81 and 82 are arranged to face each other with a different polarity, Preferably, four or more are disposed in each case. The arc generated between the stationary contact 501 and the movable contact 401 is generated by a magnetic force of a magnetic field formed between the pair of side magnet members 81 and 82, As shown in FIG. In addition, when two or more contact points are located between the pair of side magnet members 81 and 82, the direction of the arc generated at the contact points is the same, so that there is no polarity of the product.

While the specification contains many features, such features should not be construed as limiting the scope of the invention or the scope of the claims. In addition, the features described in the individual embodiments herein may be combined and implemented in a single embodiment. Conversely, various features described in the singular &lt; Desc / Clms Page number 5 &gt; embodiments herein may be implemented in various embodiments individually or in combination as appropriate.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

1: latching relay device 10: actuator
11: metal plate 111: first metal plate
112: second metal plate 12: latch
13: solenoid coil 14: yoke
15: stationary magnet 16: bobbin
17: wire 18: slider
19: lever 20: housing
30: cover 40: movable contact assembly
41: first movable contact piece 42: second movable contact piece
401: movable contact point 50: fixed contact piece
501: Fixed Increasing 60: Bus Bar
70: natural spring 81, 82: side magnet member

Claims (12)

A low-power actuator for maintaining on-off of a latching relay device by initial power application,
Solenoid coil;
A yoke disposed on both side surfaces of the solenoid coil and magnetized at opposite ends thereof by magnetic fields formed on the solenoid coil;
A latch which is located between both ends of the yoke and swings or re-swings by magnetic forces of opposite polarities at both ends of the yoke; And
And a fixed magnet coupled to the latch to maintain the position of the latch after the swing. The method according to claim 1,
The latch
A first metal plate coupled to the upper end; And
And a second metal plate coupled to the lower end
Wherein the first metal plate and the second metal plate have magnetizations of different polarities. 3. The method of claim 2,
At both ends of the yoke having magnetic properties of opposite polarity,
Wherein the metal plate is positioned between both ends of the first metal plate and the opposite ends of the second metal plate and pulls the end of the metal plate having the same polarity and pushes the metal plate having the other polarity to swing the latch Actuator. The method of claim 3,
The solenoid coil includes:
The direction of the magnetic field is reversely changed in accordance with the power application direction,
Wherein when the direction of the magnetic field formed on the solenoid coil is reversed, the magnetism formed at both ends of the yoke is reversely reversed so that the metal plate that has been pulled out is pulled out and the metal plate that is pushed out is pulled to re- swing the latch. . 1. A latching relay device in which continuous energization is maintained or cut off by initial power application,
A fixed contact piece having at least one fixed contact;
A movable contact assembly having at least one movable contact disposed at a position opposing the fixed contact; And
And an actuator for providing a driving force to the movable contact assembly for energization between the movable contact and the fixed contact
The actuator includes:
Solenoid coil; A yoke disposed on both side surfaces of the solenoid coil and magnetized at opposite ends thereof by magnetic fields formed on the solenoid coil; A latch which is located between both ends of the yoke and swings or re-swings by magnetic forces of opposite polarities at both ends of the yoke; And a fixed magnet coupled to the latch to maintain the position of the latch after the swing. 6. The method of claim 5,
The movable contact piece assembly includes:
And first and second movable contact pieces disposed opposite to each other with the actuator interposed therebetween. The method according to claim 6,
A lever coupled to the latch to move to a top dead center or a bottom dead point according to swing or re-swing of the latch;
Further comprising: a latching unit for latching the latching device. 8. The method of claim 7,
A slider that pushes up or down the first and second movable contact pieces as the lever moves to the top dead center or the bottom dead center;
Further comprising: a latching unit for latching the latching device. 9. The method of claim 8,
When the lever is moved to the top dead center, the slider pushes up the first and second movable contact pieces so that the fixed contact and the movable contact are energized,
Wherein when the lever moves to the bottom dead point, the slider pulls the first and second movable contact pieces down so that the fixed contact and the movable contact are opened. 10. The method of claim 9,
An otic spring for applying tension at a lower end of the first and second movable contact pieces when the fixed contact and the movable contact are energized;
The latching device further comprising: 11. The method according to any one of claims 5 to 10,
A pair of side magnet members for extinguishing an arc generated when the movable contact and the fixed contact are opened;
Further comprising: a latching unit for latching the latching device. 12. The method of claim 11,
Wherein the pair of side magnet members comprise:
And the movable contact and the stationary contact are disposed between the pair of side magnet members.

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