WO2020148994A1

WO2020148994A1 - Relay

Info

Publication number: WO2020148994A1
Application number: PCT/JP2019/045002
Authority: WO
Inventors: 真吾森; 亮太箕輪; 靖雄林田; 直樹川口; 航平大塚; 岩坂　博之
Original assignee: オムロン株式会社
Priority date: 2019-01-18
Filing date: 2019-11-18
Publication date: 2020-07-23
Also published as: JP2020115433A; JP7156050B2

Abstract

According to the present invention, a mobile mechanism is provided so as to be capable of moving between a closed position and an open position. When the mobile mechanism is in the closed position, a mobile contact contacts a fixed contact. When the mobile mechanism is in the open position, the mobile contact is separated from the fixed contact. The mobile mechanism movably supports a mobile contact piece. A contact follow of the mobile contact piece is larger than the length of the fixed contact and the mobile contact in the movement direction of the mobile contact piece.

Description

relay

The present invention relates to relays.

For example, as shown in Patent Document 1, some relays include a movable contact piece, a movable contact, a fixed contact, and a fixed terminal. The movable contact is connected to the movable contact piece. The movable contact piece moves between an open position and a closed position. In the open position of the movable contact piece, the movable contact is separated from the fixed contact. The movable contact contacts the fixed contact when the movable contact piece is in the closed position. As a result, the fixed terminal and the movable contact piece are energized.

JP, 2011-204478, A

ㆍIf overcurrent flows in the relay, the contact may disappear. When the contact disappears, it becomes difficult to stably energize the fixed terminal and the movable contact piece. An object of the present invention is to ensure stable energization in a relay even if the contacts disappear.

The relay according to one aspect includes a movable contact piece, a movable contact, a fixed terminal, a fixed contact, a movable mechanism, and a drive device. The movable contact is connected to the movable contact piece. The fixed contact is arranged to face the movable contact. The fixed contact is connected to the fixed terminal. The movable mechanism supports the movable contact piece. The movable mechanism is provided so as to be movable between a closed position and an open position. The movable contact contacts the fixed contact when the movable mechanism is in the closed position. When the movable mechanism is in the open position, the movable contact separates from the fixed contact. The drive device moves the movable mechanism. The contact follow of the movable contact piece is larger than the length of the fixed contact and the movable contact in the moving direction of the movable contact piece.

In the relay according to this aspect, the movable mechanism movably supports the movable contact piece. Therefore, when the movable mechanism is in the closed position and the fixed contact and the movable contact disappear, the movable contact piece can move to the length of the contact follow. Further, the contact follow of the movable contact piece is larger than the length of the fixed contact and the movable contact in the moving direction of the movable contact piece. Therefore, when the fixed contact and the movable contact disappear, the movable contact piece can move to a position where it comes into contact with the fixed terminal. Therefore, even if the fixed contact and the movable contact are lost, stable energization can be ensured.

The contact follow may be the distance between the contact start position and the closed position. The contact start position may be the position of the movable mechanism when the movable contact and the fixed contact first contact each other before the movable mechanism reaches the closed position. In this case, the movable contact piece can move from the contact start position to the contact follow length in accordance with the disappearance of the fixed contact and the movable contact.

The movable mechanism may include a drive shaft and a holding member. The drive shaft may support the movable contact piece so as to be movable relative to the drive shaft. The holding member may regulate the movement of the movable contact piece with respect to the drive shaft. The fixed terminal may include a contact support portion to which a fixed contact is connected. The contact mechanism may be located closer to the movable contact piece than the holding member in the moving direction of the movable contact piece when the movable mechanism is in the closed position. In this case, when the movable contact piece moves relative to the drive shaft, the movable contact piece can contact the contact support portion of the fixed terminal before the movement is restricted by the holding member. Therefore, even if the fixed contact and the movable contact are lost, stable energization can be ensured.

The moving contact may be separate from the moving contact piece. The fixed contact may be separate from the fixed terminal.

According to the present invention, in the relay, stable energization can be secured even if the contacts disappear.

It is a side surface sectional view showing the relay of an open state concerning an embodiment. It is a side sectional view showing a relay in a closed state. It is an enlarged view of a contact device when a movable contact starts to contact a fixed contact. It is an enlarged view of a contact device with a movable mechanism in a closed position. It is an enlarged view of a contact device when a fixed contact and a movable contact disappear.

Hereinafter, the relay 1 according to the embodiment will be described with reference to the drawings. FIG. 1 is a side sectional view showing a relay 1 according to the embodiment. As shown in FIG. 1, the relay 1 includes a contact device 2, a housing 3, and a drive device 4.

In the following description, the up, down, left, and right directions mean the up, down, left, and right directions in FIG. Specifically, the direction from the drive device 4 to the contact device 2 is defined as upward. Further, the direction from the contact device 2 to the drive device 4 is defined as downward. In FIG. 1, the direction intersecting with the vertical direction is defined as the horizontal direction. Further, a direction intersecting the vertical direction and the horizontal direction is defined as the front-back direction. The front-back direction is a direction perpendicular to the paper surface of FIG. However, these directions are defined for convenience of description, and do not limit the arrangement direction of the relay 1.

The contact device 2 is arranged in the housing 3. The contact device 2 includes a movable mechanism 10, a first fixed terminal 11, a second fixed terminal 12, a movable contact piece 13, a first fixed contact 14, a second fixed contact 15, and a first movable contact 16. , And the second movable contact 17. The first fixed terminal 11 and the second fixed terminal 12 are made of a conductive material such as copper. The

fixed contacts

14 and 15 are separate from the

fixed terminals

11 and 12. A first fixed contact 14 is connected to the first fixed terminal 11. A second fixed contact 15 is connected to the second fixed terminal 12. The first fixed contact 14 and the second fixed contact 15 are arranged apart from each other in the left-right direction. The first fixed contact 14 and the second fixed contact 15 are made of a conductive material such as silver or copper.

The first fixed terminal 11 includes a first contact support portion 21 and a first external terminal portion 22. The first contact point support portion 21 faces the movable contact piece 13. The first fixed contact 14 is connected to the first contact support portion 21. The first external terminal portion 22 is connected to the first contact support portion 21. The first external terminal portion 22 projects outward from the housing 3.

The second fixed terminal 12 includes a second contact support portion 23 and a second external terminal portion 24. The second contact point support portion 23 faces the movable contact piece 13. The second fixed contact 15 is connected to the second contact support portion 23. The second external terminal portion 24 is connected to the second contact support portion 23. The second external terminal portion 24 projects outward from the housing 3. Specifically, the first external terminal portion 22 and the second external terminal portion 24 project upward from the housing 3.

The movable contact piece 13 is made of a conductive material such as copper. The movable contact piece 13 extends in the left-right direction. In this embodiment, the longitudinal direction of the movable contact piece 13 corresponds to the left-right direction. The movable contact piece 13 is arranged so as to face the first contact support portion 21 of the first fixed terminal 11 and the second contact support portion 23 of the second fixed terminal 12 in the vertical direction.

The movable contact piece 13 is arranged so as to be movable in the contact direction Z1 and the opening direction Z2. The contact direction Z1 is a direction in which the movable contact piece 13 approaches the first fixed terminal 11 and the second fixed terminal 12 (upward in FIG. 1). The separation direction Z2 is a direction in which the movable contact piece 13 is separated from the first fixed terminal 11 and the second fixed terminal 12 (downward in FIG. 1 ).

The

movable contacts

16 and 17 are separate from the movable contact piece 13. The first movable contact 16 and the second movable contact 17 are connected to the movable contact piece 13. The first movable contact 16 and the second movable contact 17 are formed of a conductive material such as silver or copper. The first movable contact 16 and the second movable contact 17 are arranged apart from each other in the left-right direction. The first movable contact 16 faces the first fixed contact 14 in the vertical direction. The second movable contact 17 faces the second fixed contact 15 in the vertical direction.

The movable mechanism 10 supports the movable contact piece 13. The movable mechanism 10 is arranged so as to be movable in the contact direction Z1 and the opening direction Z2 together with the movable contact piece 13. The movable mechanism 10 includes a drive shaft 19, a first holding member 25, a second holding member 26, and a contact spring 27. The drive shaft 19 extends in the vertical direction. The drive shaft 19 is connected to the movable contact piece 13. The drive shaft 19 extends downward from the movable contact piece 13. The movable contact piece 13 is provided with a hole 13a. The drive shaft 19 is inserted in the hole 13a. The movable contact piece 13 is movable relative to the drive shaft 19 in the contact direction Z1 and the opening direction Z2.

The drive shaft 19 is provided so as to be movable between a closed position and an open position. FIG. 1 shows the drive shaft 19 in the open position. As shown in FIG. 1, when the drive shaft 19 is in the open position, the

movable contacts

16 and 17 are separated from the fixed

contacts

14 and 15. FIG. 2 shows the drive shaft 19 in the closed position. As shown in FIG. 2, when the drive shaft 19 is in the closed position, the

movable contacts

16 and 17 are in contact with the fixed

contacts

14 and 15.

The first holding member 25 is fixed to the drive shaft 19. The first holding member 25 is located in the opening direction Z2 with respect to the movable contact piece 13. The contact spring 27 is arranged between the movable contact piece 13 and the first holding member 25. The contact spring 27 biases the movable contact piece 13 in the contact direction Z1 while the

movable contacts

16 and 17 are in contact with the fixed

contacts

14 and 15. The second holding member 26 is fixed to the drive shaft 19. The second holding member 26 is arranged in the contact direction Z1 with respect to the movable contact piece 13. The second holding member 26 restricts the movement of the movable contact piece 13 with respect to the drive shaft 19 in the contact direction Z1.

The drive device 4 operates the movable contact piece 13 by electromagnetic force. The drive device 4 moves the movable mechanism 10 in the contact direction Z1 and the opening direction Z2. As a result, the drive device 4 moves the movable contact piece 13 in the contact direction Z1 and the opening direction Z2. The drive device 4 includes a movable iron core 31, a coil 32, a fixed iron core 33, a yoke 34, and a return spring 35.

The movable iron core 31 is connected to the drive shaft 19. The movable iron core 31 is provided so as to be movable in the contact direction Z1 and the opening direction Z2. The coil 32 is energized to generate an electromagnetic force that moves the movable iron core 31 in the contact direction Z1. The fixed iron core 33 is arranged to face the movable iron core 31. The return spring 35 is arranged between the movable iron core 31 and the fixed iron core 33. The return spring 35 biases the movable iron core 31 in the opening direction Z2.

The yoke 34 is arranged so as to surround the coil 32. The yoke 34 is arranged on the magnetic circuit formed by the coil 32. The yoke 34 is arranged above the coil 32, on the side of the coil 32, and below the coil 32.

Next, the operation of relay 1 will be described. When the coil 32 is not energized, the drive device 4 is not excited. In this case, the drive shaft 19 is pressed in the opening direction Z2 by the elastic force of the return spring 35 together with the movable iron core 31. Therefore, the drive shaft 19 is located at the open position shown in FIG. In this state, the movable contact piece 13 is also pressed in the opening direction Z2 via the movable mechanism 10. Therefore, when the drive shaft 19 is in the open position, the first movable contact 16 and the second movable contact 17 are separated from the first fixed contact 14 and the second fixed contact 15.

When the coil 32 is energized, the drive device 4 is excited. In this case, the electromagnetic force of the coil 32 causes the movable iron core 31 to move in the contact direction Z1 against the elastic force of the return spring 35. As a result, both the drive shaft 19 and the movable contact piece 13 move in the contact direction Z1. Therefore, as shown in FIG. 2, the drive shaft 19 moves to the closed position. As a result, when the drive shaft 19 is in the closed position, the first movable contact 16 and the second movable contact 17 contact the first fixed contact 14 and the second fixed contact 15, respectively.

Specifically, when the drive shaft 19 moves from the open position to the closed position, as shown in FIG. 3, before the drive shaft 19 reaches the closed position, the first movable contact 16 and the second movable contact 17 are , The first fixed contact 14 and the second fixed contact 15, respectively. Thereby, the movement of the movable contact piece 13 in the contact direction Z1 is restricted. As shown in FIG. 4, when the drive shaft 19 further moves in the contact direction Z1, the drive shaft 19 moves in the contact direction Z1 with respect to the movable contact piece 13. As a result, the distance between the first holding member 25 and the movable contact piece 13 decreases, and the contact spring 27 is compressed. Therefore, when the drive shaft 19 is in the closed position, the contact spring 27 biases the movable contact piece 13 in the contact direction Z1.

When the current to the coil 32 is stopped and demagnetized, the movable iron core 31 is pressed in the opening direction Z2 by the elastic force of the return spring 35. As a result, both the drive shaft 19 and the movable contact piece 13 move in the opening direction Z2. Therefore, as shown in FIG. 1, the movable mechanism 10 moves to the open position. As a result, the movable mechanism 10 is separated from the first fixed contact 14 and the second fixed contact 15 at the open position.

In FIG. 4, “A1” indicates contact follow. The contact follow A1 is the distance between the contact start position and the closed position. The contact start position is the position of the drive shaft 19 when the first movable contact 16 and the second movable contact 17 first contact the first fixed contact 14 and the second fixed contact 15, as shown in FIG. .. Therefore, when the drive shaft 19 is in the contact start position, the first movable contact 16 and the second movable contact 17 start to contact the first fixed contact 14 and the second fixed contact 15.

The drive shaft 19 moves further in the contact direction Z1 from the contact start position, but the movable contact piece 13 is held at the initial contact position shown in FIG. Therefore, the drive shaft 19 moves in the contact direction Z1 relative to the movable contact piece 13, and the drive shaft 19 moves to the closed position shown in FIG. In this way, the contact follow A1 described above is secured.

When the drive shaft 19 is in the closed position and the

movable contacts

16 and 17 contact the fixed

contacts

14 and 15, the movement of the movable contact piece 13 in the contact direction Z1 is restricted. However, according to the disappearance of the

movable contacts

16 and 17 and the fixed

contacts

14 and 15, the movable contact piece 13 can move from the initial contact position to the contact direction Z1 up to the length of the contact follower A1. Thereby, the contact between the

movable contacts

14 and 15 and the fixed

contacts

14 and 15 is secured.

Further, as shown in FIG. 4, the contact follow A1 of the movable contact piece 13 is larger than the sum A2 of the lengths of the first fixed contact 14 and the first movable contact 16 in the moving direction of the movable contact piece 13. In other words, when the drive shaft 19 is in the closed position, the first contact point support portion 21 is located closer to the movable contact piece 13 than the second holding member 26 in the moving direction of the movable contact piece 13. In other words, the drive shaft 19 is in the closed position, and the second holding member 26 is located above the first contact point support portion 21. Therefore, as shown in FIG. 5, even if all of the first movable contact 16 and the first fixed contact 14 disappear, the movable contact piece 13 contacts the first contact support portion 21 of the first fixed terminal 11. Can be moved to a position.

Similarly, the contact follow A1 of the movable contact piece 13 is larger than the sum A3 of the lengths of the second fixed contact 15 and the second movable contact 17 in the moving direction of the movable contact piece 13. In other words, when the drive shaft 19 is in the closed position, the second contact point support portion 23 is located closer to the movable contact piece 13 than the second holding member 26 in the moving direction of the movable contact piece 13. In other words, the drive shaft 19 is in the closed position, and the second holding member 26 is located above the second contact point support portion 23. Therefore, even if all of the second movable contact 17 and the second fixed contact 15 disappear, the movable contact piece 13 can move to a position where it comes into contact with the second contact support portion 23 of the second fixed terminal 12. ..

In the relay 1 according to the present embodiment described above, the movable contact piece 13 can contact the first fixed terminal 11 when the first fixed contact 14 and the first movable contact 16 disappear. Thereby, even if the first fixed contact 14 and the first movable contact 16 disappear, stable energization can be secured. Further, when the second fixed contact 15 and the second movable contact 17 disappear, the movable contact piece 13 can come into contact with the second fixed terminal 12. Thereby, even if the second fixed contact 15 and the second movable contact 17 are lost, stable energization can be secured.

The embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention.

In the above embodiment, the drive device 4 pushes the drive shaft 19 from the drive device 4 side, whereby the movable contact piece 13 moves in the contact direction Z1. Further, when the drive device 4 pulls the drive shaft 19 toward the drive device 4, the movable contact piece 13 moves in the opening direction Z2. However, the operation direction of the drive shaft 19 for opening and closing the contact may be opposite to that of the above-described embodiment. That is, the movable contact piece 13 may be moved in the contact direction Z1 by the drive device 4 pulling the drive shaft 19 toward the drive device 4 side. The movable contact piece 13 may move in the opening direction Z2 by the drive device 4 pushing the drive shaft 19 from the drive device 4 side. That is, the contact direction Z1 and the opening direction Z2 may be opposite to those in the above embodiment.

The above-mentioned relay 1 is a so-called plunger type relay, but the application target of the present invention is not limited to the plunger type, and other types of relays may be used. For example, the present invention may be applied to a hinge type relay.

The shape or arrangement of the first fixed terminal 11, the second fixed terminal 12, and the movable contact piece 13 may be changed. For example, the first external terminal portion 22 and the second external terminal portion 24 may protrude from the housing 3 in the left-right direction. Alternatively, the first external terminal portion 22 and the second external terminal portion 24 may project from the housing 3 in the front-rear direction.

The shape or arrangement of the movable iron core 31, the coil 32, the fixed iron core 33, or the yoke 34 may be changed. The shape or the arrangement of the first fixed contact 14, the second fixed contact 15, the first movable contact 16, and the first fixed contact 14 may be changed.

The first fixed contact 14 may be integrated with the first fixed terminal 11. The second fixed contact 15 may be integrated with the second fixed terminal 12. The first movable contact 16 may be integrated with the movable contact piece 13. The second movable contact 17 may be integrated with the movable contact piece 13.

The configuration of the movable mechanism 10 may be changed. For example, the shape or arrangement of the first holding member may be changed. The shape or arrangement of the second holding member may be changed. The shape or arrangement of the contact springs may be changed.

4 Drive device 10 Moving mechanism 13 Moving

contact piece

11,12 Fixed

terminal

14,15 Fixed

contact

16,17 Moving contact 19 Drive shaft 25 1st holding member 26 2nd holding member 27 Contact spring A1 Contact follow

Claims

A movable contact piece,
A movable contact connected to the movable contact piece,
Fixed terminal,
A fixed contact arranged facing the movable contact and connected to the fixed terminal,
A movable mechanism that is movably provided in a closed position where the movable contact contacts the fixed contact and an open position where the movable contact opens from the fixed contact, and movably supports the movable contact piece;
A drive device for moving the movable mechanism,
Equipped with
The contact follow of the movable contact piece is larger than the length of the fixed contact and the movable contact in the moving direction of the movable contact piece,
relay.
The contact follow is a distance between a contact start position and the closed position,
The contact start position is a position of the movable mechanism when the movable contact and the fixed contact first contact each other before the movable mechanism reaches the closed position,
The relay according to claim 1.
The movable mechanism is
A drive shaft supporting the movable contact piece so as to be relatively movable,
A holding member for restricting the movement of the movable contact piece with respect to the drive shaft;
Including,
The fixed terminal includes a contact support portion to which the fixed contact is connected,
The movable mechanism is in a closed position, and the contact support portion is located closer to the movable contact piece than the holding member in the moving direction of the movable contact piece.
The relay according to claim 1 or 2.
The movable contact is separate from the movable contact piece,
The relay according to any one of claims 1 to 3.
The fixed contact is separate from the fixed terminal,
The relay according to any one of claims 1 to 4.