JP7380029B2 - relay - Google Patents

Description

The present invention relates to a relay.

The plunger type relay includes a pair of fixed contacts, a movable contact piece, and a drive device. For example, in the relay of Patent Document 1, the movable contact piece has a pair of movable contacts. The pair of movable contacts are arranged apart from each other in the longitudinal direction of the movable contact piece. Each of the pair of movable contacts is arranged to face the pair of fixed contacts.

The drive device moves the movable contact piece. The drive device includes a coil and a movable core. The movable contact piece is connected to the movable iron core via the drive shaft. The movable contact piece moves as the movable iron core moves due to the magnetic force generated from the coil.

JP2017-204480A

When the movable core is moved by the magnetic force generated from the coil, if the magnetic attraction force acting on the movable core is small, the movable core will start to move slowly. Therefore, in order to smooth the movement of the movable iron core, it may be possible to increase the magnetic attraction force, but in that case, there is a risk that the drive device will become larger and the relay will become larger.

An object of the present invention is to smoothly start the movement of the movable core when it moves, while suppressing the increase in size of the relay.

A relay according to one aspect includes a first fixed terminal, a first fixed contact, a second fixed terminal, a second fixed contact, a first movable contact piece, a first movable contact, a second movable contact, It includes a moving member, a drive device, and an elastic body. The first fixed contact is connected to the first fixed terminal. The second fixed contact is connected to the second fixed terminal. The first movable contact is connected to the first movable contact piece and faces the first fixed contact. The second movable contact is connected to the first movable contact piece and faces the second fixed contact. The movable member is connected to the first movable contact piece so as to be movable between a closed position where the first movable contact contacts the first fixed contact and an open position where the first movable contact separates from the first fixed contact. The drive device includes a spool, a coil, and a movable iron core. The coil is wound onto a spool. At least a portion of the movable core is disposed within the spool. The movable iron core is connected to the movable member so as to be movable in a contact direction in which the first movable contact contacts the first fixed contact and in a separation direction in which the first movable contact contacts and separates from the first fixed contact. The drive device moves the movable member by moving the movable core according to the magnetic force generated from the coil. The elastic body generates an assisting force that assists the movement of the movable iron core in the contact direction when the moving member is in the open position.

In the relay according to this aspect, when the movable core is moved in the contact direction by magnetic force, the movement of the movable core in the contact direction is assisted by the elastic body. Thereby, sufficient force to move the movable core in the contact direction can be secured without increasing the size of the drive device and increasing the magnetic attraction force. This allows the movable core to start moving smoothly while suppressing the increase in size of the relay. In addition, for example, in a high-capacity relay with a large contact gap between the fixed contact and the movable contact, even if it is difficult to secure sufficient magnetic attraction force, the force necessary to move the movable core in the contact direction can be applied using an elastic body. This can be ensured by assisting power.

The elastic body may generate an assisting force until the moving member moves from the open position to the closed position. In this case, while suppressing the increase in size of the relay, it is possible to make the movable core start to move more smoothly when the movable core moves, and it is also possible to quickly move the movable core in the contact direction.

When the moving member is in the closed position, the elastic body does not need to generate an assisting force. In this case, since the assist force can be prevented from becoming too large, it is possible to prevent the movable core from malfunctioning in the contact direction due to the assist force when the moving member is in the open position and no magnetic force is generated from the coil. . Furthermore, the operating voltage when the moving member returns from the closed position to the open position is less affected by the elastic body.

The elastic body may be a leaf spring. In this case, the operating voltage of the drive device can be adjusted by adjusting the elastic force of the leaf spring to adjust the assist force.

The relay may further include a base that supports the drive device. The elastic body may include a support section supported by the base and a pressing section that presses the movable iron core in the contact direction via the moving member when the moving member is in the open position. In this case, the elastic body can be easily assembled.

The moving member may include a connecting portion disposed above the base. The movable core may be connected to the connecting portion. The connecting portion may include a window portion through which the elastic body can be viewed from above the base. In this case, the state of the elastic body can be visually checked from above the base, making it easier to adjust the assist force of the elastic body.

According to the present invention, it is possible to smoothly start the movement of the movable core when the movable core moves while suppressing the increase in size of the relay.

FIG. 2 is a perspective view of a relay according to an embodiment. FIG. 3 is a longitudinal cross-sectional view of the relay. FIG. 6 is a top view of the relay when the moving member is in the open position. It is a top view of a relay when a moving member is in a closed position. It is a perspective view of a moving member and the vicinity of the moving member. FIG. 3 is a view of the moving member and the vicinity of the moving member viewed from above. FIG. 6 is a diagram showing a state in which the movable core has moved in the contact direction.

Hereinafter, a relay 1 according to an embodiment will be described with reference to the drawings. FIG. 1 is a perspective view of a relay 1 according to an embodiment. FIG. 2 is a longitudinal sectional view of the relay 1. FIG. 3 is a top view of the relay 1.

The relay 1 includes a contact device 2, a housing 3, a drive device 4, and an elastic body 7. The contact device 2, the drive device 4, and the elastic body 7 are arranged within the housing 3. Housing 3 includes a base 11 and a case 12. The base 11 and case 12 are made of resin, for example. Note that the case 12 is omitted in FIGS. 1 and 3.

In the following description, the direction in which the contact device 2 and the drive device 4 are arranged with respect to the base 11 is defined as upward, and the opposite direction is defined as downward. Further, a predetermined direction intersecting the up-down direction (Z) is defined as the front-back direction (Y). A predetermined direction intersecting the up-down direction (Z) and the front-back direction (Y) is defined as the left-right direction (X). However, these directions are defined for convenience of explanation, and do not limit the arrangement direction of the relay 1.

The contact device 2 includes a first fixed terminal 13 , a second fixed terminal 14 , a first fixed contact 21 , a second fixed contact 22 , a third fixed contact 23 , and a fourth fixed contact 24 . The first fixed terminal 13 and the second fixed terminal 14 are made of a conductive material such as copper. The first fixed terminal 13 and the second fixed terminal 14 each extend in the vertical direction (Z). The first fixed terminal 13 and the second fixed terminal 14 are arranged apart from each other in the left-right direction (X). The first fixed terminal 13 and the second fixed terminal 14 are supported by the base 11.

The first fixed terminal 13 includes a first contact support part 131 and a first external terminal part 132. The second fixed terminal 14 includes a second contact support part 141 and a second external terminal part 142 (see FIG. 2). The first contact support part 131 and the second contact support part 141 are arranged inside the housing 3. The first outer terminal portion 132 and the second outer terminal portion 142 protrude outward from the housing 3. The first external terminal portion 132 and the second external terminal portion 142 protrude downward from the base 11.

The first fixed contact 21 and the third fixed contact 23 are connected to the first contact support part 131. The first fixed contact 21 and the third fixed contact 23 are separate from the first fixed terminal 13. The first fixed contact 21 and the third fixed contact 23 are arranged apart from each other in the vertical direction (Z) in the first fixed terminal 13.

The second fixed contact 22 and the fourth fixed contact 24 are arranged apart from the first fixed contact 21 and the third fixed contact 23 in the left-right direction (X). The second fixed contact 22 and the fourth fixed contact 24 are connected to the second contact support part 141. The second fixed contact 22 and the fourth fixed contact 24 are separate from the second fixed terminal 14. The second fixed contact 22 and the fourth fixed contact 24 are arranged apart from each other in the vertical direction (Z) in the second fixed terminal 14. The first to fourth fixed contacts 21-24 are made of a conductive material such as silver or copper.

The contact device 2 includes a first movable contact piece 15, a second movable contact piece 16, a first movable contact 31, a second movable contact 32, a third movable contact 33, and a fourth movable contact 34. . The first movable contact piece 15 and the second movable contact piece 16 extend in the left-right direction (X). The longitudinal direction of the first movable contact piece 15 and the second movable contact piece 16 coincides with the left-right direction (X). The first movable contact piece 15 and the second movable contact piece 16 are separate bodies from each other. The first movable contact piece 15 and the second movable contact piece 16 are arranged apart from each other in the vertical direction (Z).

The second movable contact piece 16 is arranged above the first movable contact piece 15. The first movable contact piece 15 is arranged between the second movable contact piece 16 and the base 11 in the vertical direction (Z). The first movable contact piece 15 and the second movable contact piece 16 are connected to the first contact support part 131 of the first fixed terminal 13 and the second contact support part 141 of the second fixed terminal 14 in the front-rear direction (Y). are placed facing each other. The first movable contact piece 15 and the second movable contact piece 16 are made of a conductive material such as copper.

The first movable contact 31 and the second movable contact 32 are separate from the first movable contact piece 15. The first movable contact 31 and the second movable contact 32 are connected to the first movable contact piece 15 . The first movable contact 31 and the second movable contact 32 are arranged apart from each other in the left-right direction (X). The first movable contact 31 is arranged facing the first fixed contact 21. The second movable contact 32 is arranged facing the second fixed contact 22.

The third movable contact 33 and the fourth movable contact 34 are separate from the second movable contact piece 16. The third movable contact 33 and the fourth movable contact 34 are connected to the second movable contact piece 16. The third movable contact 33 and the fourth movable contact 34 are arranged apart in the left-right direction (X). The third movable contact 33 is arranged apart from the first movable contact 31 in the vertical direction (Z). The fourth movable contact 34 is arranged apart from the second movable contact 32 in the vertical direction (Z). The third movable contact 33 is arranged facing the third fixed contact 23. The fourth movable contact 34 is arranged facing the fourth fixed contact 24. The first to fourth movable contacts 31-34 are made of a conductive material such as silver or copper.

Contact device 2 includes a moving member 17 . The moving member 17 is made of an insulating material such as resin. The moving member 17 is connected to the first movable contact piece 15 and the second movable contact piece 16. The first movable contact piece 15 is connected to the moving member 17 between the first movable contact 31 and the second movable contact 32. The first movable contact piece 15 is connected to the moving member 17 via a first contact spring 51, which will be described later. The second movable contact piece 16 is connected to the moving member 17 between the third movable contact 33 and the fourth movable contact 34 . The second movable contact piece 16 is connected to the moving member 17 via a second contact spring 52, which will be described later. Note that the first movable contact piece 15 and the second movable contact piece 16 may be directly connected to the moving member 17.

The movable member 17 is provided movably between a closed position where the first movable contact 31 contacts the first fixed contact 21 and an open position where the first movable contact 31 separates from the first fixed contact 21. 1 to 3 show the moving member 17 in the open position, and FIG. 4 shows the moving member 17 in the closed position. Note that when the moving member 17 is in the closed position, the second movable contact 32 contacts the second fixed contact 22, the third movable contact 33 contacts the third fixed contact 23, and the fourth movable contact 34 contacts the fourth It contacts the fixed contact 24. When the moving member 17 is in the open position, the second movable contact 32 is separated from the second fixed contact 22, the third movable contact 33 is separated from the third fixed contact 23, and the fourth movable contact 34 is separated from the third fixed contact 23. Separate from 24.

FIG. 5 is a perspective view of the moving member 17 and the vicinity of the moving member 17. FIG. 6 is a diagram of the moving member 17 and the vicinity of the moving member 17 viewed from above. As shown in FIGS. 2 and 5, the moving member 17 includes a connecting portion 25, a first supporting portion 41, a second supporting portion 42, a first connecting portion 43, and a second connecting portion 44. The connecting portion 25 extends in the front-back direction (Y). The first support portion 41 extends downward from the connection portion 25. The first support portion 41 supports the first movable contact piece 15 . The first support portion 41 includes a first support hole 411 . The first movable contact piece 15 is arranged within the first support hole 411 .

The second support portion 42 extends upward from the connection portion 25. The second support portion 42 supports the second movable contact piece 16. The second support portion 42 includes a second support hole 421 . The second movable contact piece 16 is arranged within the second support hole 421. The moving member 17 includes a partition wall 45 . The partition wall 45 partitions the first support hole 411 and the second support hole 421. The partition wall 45 is arranged between the first movable contact piece 15 and the second movable contact piece 16.

The moving member 17 includes a first member 17a and a second member 17b. The first member 17a and the second member 17b are separate bodies. The first member 17a and the second member 17b are connected to each other by a snap fit. The first member 17a includes a connecting portion 25, a portion of the first supporting portion 41, a portion of the second supporting portion 42, a first connecting portion 43, and a second connecting portion 44. The second member 17b includes a part of the first support part 41 and a part of the second support part 42. The first support hole 411 and the second support hole 421 are provided between the first member 17a and the second member 17b.

As shown in FIG. 2, the upper end of the moving member 17 is located close to the case 12. The lower end of the moving member 17 is arranged on the base 11. The moving member 17 is supported by the base 11 in the vertical direction (Z).

The contact device 2 includes a first contact spring 51 and a second contact spring 52. The first contact spring 51 is arranged between the first movable contact piece 15 and the first support part 41. The first contact spring 51 is arranged within the first support hole 411 . In a state where the first movable contact 31 is in contact with the first fixed contact 21 and the second movable contact 32 is in contact with the second fixed contact 22, the first contact spring 51 pushes the first movable contact piece 15. Press toward the first fixed terminal 13 and the second fixed terminal 14. The first contact spring 51 is a coil spring, and is at its natural length when the moving member 17 is in the open position.

The second contact spring 52 is arranged between the second movable contact piece 16 and the second support portion 42 . The second contact spring 52 is arranged within the second support hole 421. With the third movable contact 33 in contact with the third fixed contact 23 and the fourth movable contact 34 in contact with the fourth fixed contact 24, the second contact spring 52 pushes the second movable contact piece 16 Press toward the first fixed terminal 13 and the second fixed terminal 14. The second contact spring 52 is a coil spring, and is at its natural length when the moving member 17 is in the open position.

The drive device 4 moves the first movable contact piece 15 and the second movable contact piece 16 by electromagnetic force. The drive device 4 moves the first movable contact piece 15 and the second movable contact piece 16 in the contact direction (Y1) and the separation direction (Y2). The contact direction (Y1) is the direction in which the movable contacts 31-34 contact the fixed contacts 21-24 in the front-rear direction (Y). The separation direction (Y2) is a direction in which the movable contacts 31-34 move away from the fixed contacts 21-24 in the front-rear direction (Y). The drive device 4 includes a coil 61, a spool 62, a movable core 63, a fixed core 64, and a yoke 65, as shown in FIG.

The coil 61 is wound around a spool 62. The axis of the coil 61 extends in the front-rear direction (Y). Spool 62 includes a hole 621 extending in the axial direction of coil 61 . At least a portion of the movable core 63 is disposed within the hole 621 of the spool 62. The movable iron core 63 is provided so as to be movable in the contact direction (Y1) and the separation direction (Y2).

The movable iron core 63 is connected to the moving member 17. The first movable contact piece 15 and the movable iron core 63 are electrically insulated by the moving member 17. The second movable contact piece 16 and the movable iron core 63 are electrically insulated by the moving member 17.

As shown in FIG. 2, the connecting portion 25 of the moving member 17 includes a locking groove 59. As shown in FIG. The movable core 63 includes a connecting portion 66 . The connecting portion 66 of the movable iron core 63 is arranged within the locking groove 59 of the moving member 17. Thereby, the movable core 63 is connected to the moving member 17 by the connecting portion 66 being locked in the locking groove 59 .

The movable core 63 moves integrally with the moving member 17 in the front-back direction (Y). The movable iron core 63 moves in the contact direction (Y1) or the separation direction (Y2) depending on the magnetic force generated from the coil 61. As the movable core 63 moves, the moving member 17 moves to the closed position or the open position. Further, as the moving member 17 moves, the first movable contact piece 15 and the second movable contact piece 16 move in the contact direction (Y1) or the separation direction (Y2).

The fixed core 64 is disposed within the hole 621 of the spool 62. The fixed iron core 64 is arranged facing the movable iron core 63 in the front-rear direction (Y). When energized, the coil 61 generates an electromagnetic force that moves the movable iron core 63 in the contact direction (Y1).

Yoke 65 is arranged to surround coil 61. The yoke 65 is arranged on a magnetic circuit formed by the coil 61. The yoke 65 includes a first yoke 67 and a second yoke 68, as shown in FIGS. 1 to 3. The first yoke 67 extends in the front-back direction (Y) and the left-right direction (X). The first yoke 67 faces the moving member 17 in the front-rear direction (Y). Parts of the second yoke 68 are arranged on the left and right sides of the coil 61. The second yoke 68 is connected to the fixed iron core 64.

As shown in FIG. 3, the relay 1 includes a first return spring 53 and a second return spring 54. The first return spring 53 and the second return spring 54 are arranged between the moving member 17 and the drive device 4. The first return spring 53 is connected to the first connection portion 43 of the moving member 17. The second return spring 54 is connected to the second connecting portion 44 . The first return spring 53 and the second return spring 54 bias the movable iron core 63 in the separating direction.

The elastic body 7 generates an assist force that assists the movement of the movable core 63 in the contact direction (Y1) when the moving member 17 is in the open position. The elastic body 7 in this embodiment presses the movable core 63 in the contact direction (Y1) via the moving member 17 when the moving member 17 is in the open position. Therefore, in FIG. 2, the elastic body 7 is in a state pressing the movable core 63 in the contact direction (Y1). The elastic body 7 generates an assisting force until the moving member 17 moves from the open position to the closed position. That is, the elastic body 7 presses the movable core 63 in the contact direction (Y1) until the moving member 17 moves from the open position to the closed position, thereby assisting the movement of the movable core 63 in the contact direction (Y1). The assist force of the elastic body 7 is set smaller than the elastic force of the return springs 53 and 54.

FIG. 7 is a diagram showing a state in which the movable iron core 63 has moved in the contact direction (Y1). At this time, the moving member 17 is in the closed position. When the moving member 17 is in the closed position, the elastic body 7 does not generate assist force. That is, when the moving member 17 is in the closed position, the elastic body 7 does not press the movable core 63 in the contact direction (Y1). Therefore, when the movable member 17 is in the closed position, the elastic body 7 is in a natural state, that is, a state in which it is not elastically deformed, except for the support portion 71 of the elastic body 7, which will be described later.

The elastic body 7 is formed, for example, by bending a plate spring. Specifically, as shown in FIGS. 5 and 7, the elastic body 7 includes a support portion 71, an intermediate portion 72, and a pressing portion 73.

The support portion 71 is supported by a support groove 111 provided in the base 11. The support groove 111 is arranged between the contact device 2 and the drive device 4 and extends in the vertical direction. The support portion 71 includes a pair of locking protrusions 711 . The pair of locking protrusions 711 are formed by raising a part of the support portion 71 toward the contact direction (Y1) side. The elastic body 7 is supported in the support groove 111 by the elastic force of a pair of locking protrusions 711.

The intermediate portion 72 is a portion that connects the support portion 71 and the pressing portion 73, and is bent from the upper end of the support portion 71 and extends forward.

The pressing portion 73 extends upward from the front end of the intermediate portion 72. The pressing portion 73 includes a protrusion 731 that protrudes toward the contact direction (Y1). The protrusion 731 is provided at the upper end of the pressing portion 73 and is formed in a hemispherical shape. The protrusion 731 contacts the outer surface of the front wall portion 59a of the locking groove 59 and presses the movable core 63 in the contact direction (Y1) via the moving member 17.

Here, as shown in FIGS. 3 and 6, the connecting portion 25 of the moving member 17 includes a window portion 25a through which the elastic body 7 can be viewed from above the base 11. The window portion 25a in this embodiment is constituted by a through hole that penetrates the connecting portion 25 in the vertical direction. The window portion 25a is formed at a position where at least the pressing portion 73 of the elastic body 7 can be visually recognized.

Next, the operation of relay 1 will be explained. When the coil 61 is not energized, the drive device 4 is not excited. In this case, the movable member 17 is pressed in the separating direction by the elastic force of the return springs 53 and 54 together with the movable iron core 63, and the movable member 17 is located at the open position shown in FIG. 2. At this time, the relationship between the elastic forces of the return springs 53 and 54 and the assist force of the elastic body 7 is set to such a force relationship that the movable core 63 does not malfunction in the contact direction (Y1) due to the assist force of the elastic body 7. ing. In this state, the first movable contact piece 15 and the second movable contact piece 16 are also pressed in the separation direction via the moving member 17. Therefore, when the moving member 17 is in the open position, the first movable contact 31 and the second movable contact 32 are separated from the first fixed contact 21 and the second fixed contact 22. Similarly, when the moving member 17 is in the open position, the third movable contact 33 and the fourth movable contact 34 are separated from the third fixed contact 23 and the fourth fixed contact 24.

When the coil 61 is energized, the drive device 4 is excited. In this case, the electromagnetic force of the coil 61 causes the movable core 63 to move in the contact direction (Y1) against the elastic force of the return springs 53 and 54. Thereby, the moving member 17, the first movable contact piece 15, and the second movable contact piece 16 all move in the contact direction (Y1). Therefore, as shown in FIG. 4, the moving member 17 moves to the closed position. As a result, when the moving member 17 is in the closed position, the first movable contact 31 and the second movable contact 32 contact the first fixed contact 21 and the second fixed contact 22, respectively. Similarly, when the moving member 17 is in the closed position, the third movable contact 33 and the fourth movable contact 34 contact the third fixed contact 23 and the fourth fixed contact 24, respectively. Thereby, the first movable contact piece 15 and the second movable contact piece 16 are electrically connected in parallel to each other with respect to the first fixed terminal 13 and the second fixed terminal 14.

When the current to the coil 61 is stopped and demagnetized, the movable iron core 63 is pressed in the separating direction by the elastic force of the return springs 53 and 54. Thereby, the moving member 17, the first movable contact piece 15, and the second movable contact piece 16 move together in the separation direction (Y2). Therefore, as shown in FIG. 3, the moving member 17 moves to the open position. As a result, when the moving member 17 is in the open position, the first movable contact 31 and the second movable contact 32 are separated from the first fixed contact 21 and the second fixed contact 22. Similarly, when the moving member 17 is in the open position, the third movable contact 33 and the fourth movable contact 34 are separated from the third fixed contact 23 and the fourth fixed contact 24.

In the relay 1 according to the present embodiment described above, when the movable core 63 is moved in the contact direction (Y1) by the drive device 4, the movement of the movable core 63 in the contact direction (Z1) is assisted by the elastic body 7. Ru. Thereby, sufficient force to move the movable iron core 63 in the contact direction (Y1) can be ensured without increasing the size of the drive device 4 to increase the magnetic attraction force. Thereby, the movable core 63 can be smoothly started to move while the relay 1 is prevented from increasing in size. Furthermore, for example, in a high-capacity relay with a large gap between the first to fourth movable contacts 31-34 and the first to fourth fixed contacts 21-24, even if it is difficult to secure sufficient magnetic attraction force, the movable iron core The force necessary to move 63 in the contact direction (Y1) can be secured by the assist force of elastic body 7.

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

In the embodiment described above, the first movable contact piece 15 and the second movable contact piece 16 move in the separation direction by the drive device 4 pushing out the moving member 17 from the drive device 4 side to the contact device 2 side. Furthermore, when the drive device 4 draws the moving member 17 from the contact device 2 side to the drive device 4 side, the first movable contact piece 15 and the second movable contact piece 16 move in the contact direction. However, the direction of movement of the moving member 17 for opening and closing the contacts may be opposite to that of the embodiments described above. That is, the first movable contact piece 15 and the second movable contact piece 16 may move in the contact direction by the drive device 4 pushing out the moving member 17 from the drive device 4 side to the contact device 2 side. The first movable contact piece 15 and the second movable contact piece 16 may move in the separation direction by the drive device 4 pulling the moving member 17 from the contact device 2 side to the drive device 4 side. That is, the contact direction and the separation direction may be opposite to those in the above embodiment.

The shape or arrangement of the first fixed terminal 13, the second fixed terminal 14, the first movable contact piece 15, and the second movable contact piece 16 may be changed. For example, the first external terminal portion 132 and the second external terminal portion 142 may protrude from the base 11 in a direction different from that in the above embodiment. The first movable contact piece 15 and the second movable contact piece 16 may be integrated. That is, the first to fourth movable contacts 31-34 may be connected to an integral movable contact piece. Alternatively, the second movable contact piece 16, the third and fourth movable contacts 33 and 34, and the third and fourth fixed contacts 23 and 24 may be omitted.

The shape or arrangement of the coil 61, spool 62, movable core 63, fixed core 64, or yoke 65 may be changed. The shape or arrangement of the first to fourth fixed contacts 21-24 may be changed. The shape or arrangement of the first to fourth movable contacts 31-34 may be changed.

The first fixed contact 21 and/or the third fixed contact 23 may be integrated with the first fixed terminal 13. The first fixed contact 21 and/or the third fixed contact 23 may be part of the first fixed terminal 13 and may be flush with other parts of the first fixed terminal 13. The second fixed contact 22 and/or the fourth fixed contact 24 may be integrated with the second fixed terminal 14. The second fixed contact 22 and/or the fourth fixed contact 24 may be part of the second fixed terminal 14 and may be flush with other parts of the second fixed terminal 14.

The first movable contact 31 and/or the second movable contact 32 may be integrated with the first movable contact piece 15. The first movable contact 31 and/or the second movable contact 32 may be part of the first movable contact piece 15 and may be flush with other parts of the first movable contact piece 15 . The third movable contact 33 and/or the fourth movable contact 34 may be integrated with the second movable contact piece 16. The third movable contact 33 and/or the fourth movable contact 34 may be part of the second movable contact piece 16 and may be flush with other parts of the second movable contact piece 16.

The moving member 17 does not need to be supported by the housing 3. The moving member 17 may be made of a conductive material. The moving member 17 may be made of metal. The moving member 17 may be a shaft member that connects the movable contact pieces 15 and 16 and the movable iron core 63. In this case, the movable contact pieces 15 and 16 may be supported by a holder. Further, the window portion 25a of the moving member 17 may be omitted.

The shape or arrangement of the elastic body 7 may be changed. The elastic body 7 may be configured to generate an assisting force that assists the movement of the movable iron core 63 in the contact direction (Y1) when the moving member 17 is in the open position. The elastic body 7 may be a coil spring. The elastic body 7 may be supported by a member other than the base 11. In the embodiment described above, the elastic body 7 presses the movable core 63 in the contact direction (Y1) via the moving member 17, but it may also press the movable core 63 via another member, or the movable core 63 may be pressed via another member. 63 may be pressed directly. Further, the assist force of the elastic body 7 does not necessarily need to be generated until the moving member 17 moves from the open position to the closed position. Further, when the moving member 17 is in the closed position, the assisting force of the elastic body 7 may be generated.

According to the present invention, it is possible to smoothly start the movement of the movable core when the movable core moves while suppressing the increase in size of the relay.

4... Drive device, 7... Elastic body, 11... Base, 13... First fixed terminal, 14... Second fixed terminal, 15... First movable contact piece 17... - Moving member, 21... First fixed contact, 22... Second fixed contact, 25... Connecting part, 25a... Window part, 31... First movable contact, 32... Third 2 movable contact, 61...coil, 62...spool, 63...movable core, 71...support part, 73...pressing part

Claims (7)

a first fixed terminal;
a first fixed contact connected to the first fixed terminal;
a second fixed terminal;
a second fixed contact connected to the second fixed terminal;
a first movable contact piece;
a first movable contact connected to the first movable contact piece and facing the first fixed contact;
a second movable contact connected to the first movable contact piece and facing the second fixed contact;
The first movable contact is connected to the first movable contact piece so as to be movable between a closed position where the first movable contact contacts the first fixed contact and an open position where the first movable contact separates from the first fixed contact. a moving member;
a spool, a coil wound around the spool, and at least a portion of which is disposed within the spool, and the first movable contact is movable in a contact direction in which it contacts the first fixed contact and in a separation direction in which it separates from the first fixed contact. a drive device that includes a movable core connected to the movable member and moves the movable core by moving the movable core in response to magnetic force generated from the coil;
an elastic body that contacts the moving member or the movable core to generate an assist force that assists the movement of the movable core in the contact direction when the movable member is in the open position;
Equipped with
relay. The elastic body generates the assisting force until the moving member moves from the open position to the closed position.
The relay according to claim 1. when the movable member is in the closed position, the elastic body does not generate the assisting force;
The relay according to claim 1 or 2. the elastic body is a leaf spring;
A relay according to any one of claims 1 to 3. further comprising a base that supports the drive device,
The elastic body includes a support part supported by the base, and a pressing part that presses the movable iron core in the contact direction via the moving member when the moving member is in the open position.
The relay according to claim 4. a first fixed terminal;
a first fixed contact connected to the first fixed terminal;
a second fixed terminal;
a second fixed contact connected to the second fixed terminal;
a first movable contact piece;
a first movable contact connected to the first movable contact piece and facing the first fixed contact;
a second movable contact connected to the first movable contact piece and facing the second fixed contact;
The first movable contact is connected to the first movable contact piece so as to be movable between a closed position where the first movable contact contacts the first fixed contact and an open position where the first movable contact separates from the first fixed contact. a moving member;
a spool, a coil wound around the spool, and at least a portion of which is disposed within the spool, and the first movable contact is movable in a contact direction in which it contacts the first fixed contact and in a separation direction in which it separates from the first fixed contact. a drive device that includes a movable core connected to the movable member and moves the movable core by moving the movable core in response to magnetic force generated from the coil;
an elastic body that generates an assisting force that assists the movement of the movable iron core in the contact direction when the moving member is in the open position;
a base that supports the drive device;
Equipped with
The moving member includes a connecting part disposed above the base,
The movable iron core is connected to the connecting portion,
The connecting portion includes a window portion through which the elastic body is visible from above the base.
relay. a first fixed terminal;
a first fixed contact connected to the first fixed terminal;
a second fixed terminal;
a second fixed contact connected to the second fixed terminal;
a first movable contact piece;
a first movable contact connected to the first movable contact piece and facing the first fixed contact;
a second movable contact connected to the first movable contact piece and facing the second fixed contact;
The first movable contact is connected to the first movable contact piece so as to be movable between a closed position where the first movable contact contacts the first fixed contact and an open position where the first movable contact separates from the first fixed contact. a moving member;
a spool, a coil wound around the spool, and at least a portion of which is disposed within the spool, and the first movable contact is movable in a contact direction in which it contacts the first fixed contact and in a separation direction in which it separates from the first fixed contact. a drive device that includes a movable core connected to the movable member and moves the movable core by moving the movable core in response to magnetic force generated from the coil;
an elastic body that generates an assisting force that assists the movement of the movable iron core in the contact direction when the moving member is in the open position;
A state in which the first movable contact piece is disposed between the first movable contact piece and the movable member, the first movable contact is in contact with the first fixed contact, and the second movable contact is in contact with the second fixed contact. a first contact spring pressed against the moving member in the contact direction;
Equipped with
relay.

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