JP7443913B2 - electromagnetic relay - Google Patents

Description

The present invention relates to an electromagnetic relay.

2. Description of the Related Art Conventionally, an electromagnetic relay for opening and closing an electric circuit has been known, in which a conductive auxiliary member is attached to a movable contact piece in order to increase current carrying capacity (see Patent Document 1). The conductive auxiliary member also functions as a member that suppresses heat generation of the movable contact piece.

Japanese Patent Application Publication No. 2015-191857

In the electromagnetic relay of Patent Document 1, since the conductive auxiliary member is attached to the movable contact piece, the weight of the movable contact piece becomes heavy and the impact resistance and vibration resistance become weak. Furthermore, if the weight of the movable contact piece increases, it is necessary to increase the magnetic attraction force for moving the movable contact piece, and there is a risk that the device that generates the magnetic attraction force will become larger.

An object of the present invention is to improve the heat dissipation of a movable contact piece in an electromagnetic relay while suppressing an increase in the weight of the movable contact piece.

An electromagnetic relay according to one aspect of the present invention includes a first fixed terminal, a movable contact piece, a movable mechanism, a drive device, and a first heat radiating member. The first fixed terminal includes a first fixed contact. The movable contact piece includes a first movable contact that can contact the first fixed contact. The movable mechanism moves the movable contact piece between a contact position where the first movable contact contacts the first fixed contact and a separation position where the first movable contact separates from the first fixed contact. The drive device operates the movable mechanism using electromagnetic force. The first heat radiating member does not contact the movable contact piece when the movable contact piece is in the open position, but contacts the movable contact piece when the movable contact piece is in the contact position to radiate heat generated by the movable contact piece. do.

In this electromagnetic relay, when the movable contact piece is in the open position, the first heat radiating member does not contact the movable contact piece. On the other hand, when the movable contact piece is in the contact position, the first heat radiating member contacts the movable contact piece and radiates heat generated by the movable contact piece. Thereby, the heat dissipation of the movable contact piece can be improved while suppressing an increase in the weight of the movable contact piece.

The first heat radiating member may contact the movable contact piece before the first movable contact contacts the first fixed contact. In this case, the heat radiating member can be reliably brought into contact with the movable contact piece.

The first heat dissipation member may be bent in a direction in which the first movable contact contacts the first fixed contact. In this case, when the movable contact piece contacts the heat radiating member, the movable contact piece can move the heat radiating member toward the contact position.

The electromagnetic relay may further include a case that accommodates the first fixed contact and the first movable contact. The first heat radiating member may be exposed to the outside from the case. In this case, the heat dissipation of the movable contact piece can be further improved.

The electromagnetic relay may further include a case that accommodates the first fixed contact and the first movable contact, a permanent magnet that generates a magnetic field within the case, and a yoke that is connected to the permanent magnet. The first heat radiating member may be placed in contact with the yoke. In this case, the heat generated by the movable contact piece can be radiated from the yoke via the heat radiating member.

The first heat radiating member may be made of the same material as the movable contact piece or a material with higher thermal conductivity than the movable contact piece. In this case, the heat dissipation of the movable contact piece can be further improved.

The first heat radiating member may include a main body portion and a contact portion protruding from the main body portion toward the movable contact piece. The contact portion may contact the movable contact piece when the movable contact piece is in the contact position. In this case, the contact between the movable contact piece and the first heat radiating member is stabilized.

The electromagnetic relay may further include an insulating wall. The insulating wall is provided around the first heat radiating member and protects the first heat radiating member from an arc generated between the first fixed contact and the first movable contact. In this case, the first heat radiating member can be protected from arcs generated between the contacts.

The electromagnetic relay may further include a second fixed terminal. The second fixed terminal may include two fixed contacts and may be spaced apart from the first fixed terminal. The movable contact piece may include a second movable contact that can contact the second fixed contact. The second movable contact may be in contact with the second fixed contact when the movable contact piece is in the contact position, and may be separated from the second fixed contact when the movable contact piece is in the open position. The heat dissipation member 21 is conductive and includes a first contact portion that contacts the movable contact piece when the movable contact piece is in the contact position, and a first contact portion that is disposed at a position away from the first contact portion and that contacts the movable contact piece when the movable contact piece is in the contact position. and a second contact portion that contacts the movable contact piece at a certain time. The first contact part and the second contact part may be arranged between the first movable contact and the second movable contact. In this case, since the heat dissipation member also functions as an electric path, the number of electric paths increases and the heat generation of the movable contact piece can be further suppressed.

The electromagnetic relay may further include a second fixed terminal. The second fixed terminal may include two fixed contacts and may be spaced apart from the first fixed terminal. The movable contact piece may include a second movable contact that can contact the second fixed contact. The second movable contact may be in contact with the second fixed contact when the movable contact piece is in the contact position, and may be separated from the second fixed contact when the movable contact piece is in the open position. The first heat radiating member may be arranged at a position biased toward either the first movable contact or the second movable contact. In this case, one contact can be brought into contact or separated before the other contact.

The electromagnetic relay may further include a second heat radiating member. The second heat radiating member is arranged at a distance from the first heat radiating member, and does not contact the movable contact piece when the movable contact piece is in the open position, but makes contact with the movable contact piece when the movable contact piece is in the contact position. The heat generated by the movable contact piece may be radiated by contacting the movable contact piece. The second heat radiating member may contact the movable contact piece before the first heat radiating member contacts the movable contact piece. In this case, the heat dissipation of the movable contact piece can be further improved, and one of the contacts can be brought into contact or separated before the other contact.

According to the present invention, in an electromagnetic relay, the heat dissipation of the movable contact piece can be improved while suppressing an increase in the weight of the movable contact piece.

FIG. 2 is a schematic diagram of the inside of the electromagnetic relay seen from the front. FIG. 3 is a schematic diagram of the contact device viewed from the right side. (A) is a schematic diagram of the contact device seen from the front when the movable contact piece is in the open position. (B) is a schematic diagram of the contact device seen from the front when the movable contact piece is in the contact position. FIG. 7 is a schematic diagram of a contact device of an electromagnetic relay according to a modified example, viewed from the right side. FIG. 7 is a schematic diagram of a contact device of an electromagnetic relay according to a modified example, viewed from the right side. FIG. 7 is a schematic diagram of the inside of an electromagnetic relay according to a modification seen from above. FIG. 7 is a schematic diagram of a contact device of an electromagnetic relay according to a modified example, viewed from the right side. It is a schematic diagram seen from the front of a contact device of an electromagnetic relay concerning a modification. FIG. 7 is a schematic cross-sectional view of the vicinity of a contact device of an electromagnetic relay according to a modification. (A) is a schematic view of the contact device seen from the left when the movable contact piece is in the open position in a modified example. (B) is a schematic view of the contact device seen from the left when the movable contact piece is in the contact position in a modified example. FIG. 7 is a schematic cross-sectional view of the vicinity of a contact device of an electromagnetic relay according to a modification. FIG. 7 is a schematic cross-sectional view of the vicinity of a contact device of an electromagnetic relay according to a modification. FIG. 7 is a schematic cross-sectional view of the vicinity of a contact device of an electromagnetic relay according to a modification. It is a schematic diagram seen from the left of a contact device of an electromagnetic relay according to a modification. FIG. 7 is a schematic diagram of the inside of an electromagnetic relay according to a modification seen from above. FIG. 7 is a schematic diagram of a contact device of an electromagnetic relay according to a modified example, viewed from the right side. It is a schematic diagram seen from the front of a contact device of an electromagnetic relay concerning a modification.

Embodiments of an electromagnetic relay according to one aspect of the present invention will be described below with reference to the drawings. When referring to the drawings, in order to make the explanation easier to understand, the upper side of Figures 1 and 9 is referred to as "top", the lower side as "bottom", the left side as "left", the right side as "right", and the front side of the paper as "top". The explanation will be given as the "front" and the back side of the paper as the "back". FIG. 1 is a schematic diagram of the inside of the electromagnetic relay 100 viewed from the front.

The electromagnetic relay 100 is a so-called hinge type electromagnetic relay. The electromagnetic relay 100 includes a case 2, a contact device 3, and a drive device 4. The case 2 is made of an insulating material such as resin. Case 2 includes a base 2a and a cover 2b.

The base 2a supports the contact device 3 and the drive device 4. The cover 2b is a box-shaped member that opens downward and is fixed to the base 2a so as to cover the base 2a from above.

FIG. 2 is a schematic diagram of the contact device 3 viewed from the right side. Contact device 3 is supported by base 2a. The contact device 3 is housed in the case 2. The contact device 3 includes a fixed terminal 6, a fixed terminal 7, a movable contact piece 10, and a movable mechanism 11. The fixed terminals 6 and 7 and the movable contact piece 10 are plate-shaped terminals, and are made of a conductive material such as copper. The fixed terminals 6, 7 and the movable contact piece 10 extend in the vertical direction and are press-fitted and fixed to the base 2a.

A portion of the fixed terminal 6 is disposed inside the case 2. The fixed terminal 6 includes a fixed contact 6a and an external connection part 6b. The fixed contact 6a is arranged inside the case 2. The external connection portion 6b protrudes from the case 2 to the outside and is electrically connected to an external device (not shown).

The fixed terminal 7 has a similar shape to the fixed terminal 6. A portion of the fixed terminal 7 is disposed inside the case 2. The fixed terminal 7 is spaced apart from the fixed terminal 6 in the front-rear direction. The fixed terminal 7 includes a fixed contact 7a and an external connection portion (not shown). The fixed contact 7a is arranged inside the case 2. The external connection portion protrudes from the case 2 to the outside and is electrically connected to an external device (not shown).

The movable contact piece 10 is composed of an elastically deformable plate spring. The movable contact piece 10 includes a movable contact 10a, a movable contact 10b, a leg portion 10c, a leg portion 10d, and a connecting portion 10e. The movable contact 10a is arranged on the leg portion 10c. The movable contact 10a can contact the fixed contact 6a. The movable contact 10b is arranged on the leg 10d. The movable contact 10b can contact the fixed contact 7a. The movable contact 10b is spaced apart from the movable contact 10a in the front-rear direction. The leg portion 10c is arranged to face the fixed terminal 6 in the left-right direction. The leg portion 10d is arranged to face the fixed terminal 7 in the left-right direction. The connecting portion 10e extends in the front-rear direction from the upper end of the leg portion 10c toward the upper end of the leg portion 10d, and connects the leg portion 10c and the leg portion 10d.

The movable mechanism 11 includes a card member 11a. The card member 11a is supported by the base 2a so as to be rotatable in the left-right direction. The card member 11a is arranged between the movable contact piece 10 and the drive device 4. The card member 11a is connected to the movable contact piece 10 and the drive device 4.

3(A) and 3(B) are schematic diagrams of the contact device 3 viewed from the front. The movable mechanism 11 moves the movable contact piece 10 in a contact direction Z1 in which the movable contacts 10a and 10b contact the fixed contacts 6a and 7a and in a separation direction Z2 in which they separate. Specifically, the movable mechanism 11 has two positions: one in which the movable contacts 10a and 10b are separated from the fixed contacts 6a and 7a as shown in FIG. The movable contact piece 10 is moved to a contact position where it contacts the contacts 6a and 7a. The moving direction of the movable contact piece 10 in this embodiment corresponds to the left-right direction.

The drive device 4 operates the movable mechanism 11 by electromagnetic force. Specifically, the drive device 4 moves the movable contact piece 10 between the contact position and the separation position by rotating the card member 11a using electromagnetic force.

The drive device 4 is supported by the base 2a. The drive device 4 includes a coil 4a, a movable iron piece 4b, a yoke 4c, and an iron core 4d. The movable iron piece 4b is supported by a yoke 4c. When a voltage is applied to the coil 4a and the coil 4a is excited, the movable iron piece 4b is attracted to the iron core 4d and rotates, and the movable iron piece 4b presses the card member 11a. By pressing the card member 11a against the movable iron piece 4b, the movable contact piece 10 is pressed in the contact direction Z1. As a result, the movable contact piece 10 moves to the contact position, and the movable contacts 10a, 10b contact the fixed contacts 6a, 7a. Note that FIG. 1 shows a state in which a voltage is applied to the coil 4a, that is, a state in which the movable contact piece 10 is in the contact position.

The electromagnetic relay 100 further includes a heat radiation member 21. The heat radiation member 21 is made of the same material as the movable contact piece 10 or a material with higher thermal conductivity than the movable contact piece 10. The movable contact piece 10 in this embodiment is made of a conductive and elastically deformable plate spring made of copper, aluminum, or the like.

The heat radiation member 21 is press-fitted and fixed to the base 2a. The heat dissipation member 21 is arranged between the fixed terminal 6 and the fixed terminal 7, as shown in FIG. As shown in FIG. 1, a portion of the heat dissipating member 21 is exposed to the outside from the case 2. In this embodiment, the lower end of the heat radiating member 21 projects downward from the base 2a. Note that the heat radiating member 21 does not necessarily need to be exposed to the outside from the case 2.

The heat dissipation member 21 does not contact the movable contact piece 10 when the movable contact piece 10 is in the open position. The heat radiation member 21 contacts the movable contact piece 10 when the movable contact piece 10 is in the contact position, and radiates the heat generated by the movable contact piece 10. Specifically, as shown in FIG. 3(A), the heat dissipation member 21 is arranged at a position away from the movable contact piece 10 when the movable contact piece 10 is in the open position. As shown in FIG. 3B, the heat radiating member 21 contacts the movable contact piece 10 and radiates the heat generated by the movable contact piece 10 when the movable contact piece 10 is in the contact position. The distal end side of the heat radiating member 21 contacts the connecting portion 10e of the movable contact piece 10 when the movable contact piece 10 is in the contact position. As shown in FIG. 2, the heat dissipation member 21 contacts the movable contact piece 10 at the center position between the movable contact 10a and the movable contact 10b in the left-right direction. Note that the heat dissipation member 21 is arranged at a position away from the fixed terminals 6 and 7 and does not come into contact with the fixed terminals 6 and 7.

The heat dissipation member 21 is bent in the direction in which the movable contacts 10a, 10b contact the fixed contacts 6a, 7a. Specifically, the heat dissipation member 21 is pressed by the movable contact piece 10 and bends in the same direction as the movable contact piece 10 . The heat dissipation member 21 is configured so that the movable contacts 10a, 10b contact the movable contact piece 10 before the movable contacts 10a, 10b contact the fixed contacts 6a, 7a. That is, the heat radiating member 21 contacts the movable contact piece 10 while the movable contact piece 10 moves from the separation position to the contact position. Therefore, the heat radiation member 21 is pressed against the movable contact piece 10 in the contact direction Z1. When the movable contact piece 10 is in the open position, the distance from the movable contact piece 10 to the heat radiation member 21 is smaller than the distance from the movable contacts 10a, 10b to the fixed contacts 6a, 7a.

In the electromagnetic relay 100 described above, the heat dissipation member 21 does not contact the movable contact piece 10 when the movable contact piece 10 is in the open position. On the other hand, when the movable contact piece 10 is in the contact position, the heat radiating member 21 contacts the movable contact piece 10 and radiates the heat generated by the movable contact piece 10 . Thereby, the heat dissipation of the movable contact piece 10 can be improved while suppressing an increase in the weight of the movable contact piece 10.

Moreover, since the heat dissipation member 21 contacts the movable contact piece 10 before the movable contacts 10a, 10b contact the fixed contacts 6a, 7a, the heat dissipation member 21 can be brought into contact with the movable contact piece 10 reliably. Moreover, when a part of the heat dissipation member 21 is exposed to the outside from the case 2, the heat dissipation performance of the movable contact piece 10 can be further improved.

Although the embodiment of the electromagnetic relay according to one aspect 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. For example, the configuration of the drive device 4 may be changed. The shape or arrangement of the case 2, the contact device 3, the movable mechanism 11, and the heat radiation member 21 may be changed. Two or more heat radiating members 21 may be provided.

The heat dissipation member 21 may be formed of a material having lower thermal conductivity than the movable contact piece 10. The heat dissipation member 21 may be made of an insulating material such as resin. When resin is used as the material for the heat dissipation member 21, arc-extinguishing gas can be expected. The heat dissipating member 21 may be formed by incorporating metal into resin, for example, by insert molding. The heat dissipating member 21 does not necessarily have to have spring properties.

The heat dissipation member 21 does not necessarily need to contact the movable contact piece 10 before the movable contacts 10a, 10b contact the fixed contacts 6a, 7a. Furthermore, a member having a cooling effect may be attached to the heat dissipating member 21 at a portion that contacts the movable contact piece 10.

FIG. 4 is a schematic diagram of the contact device 3 of the electromagnetic relay 100 according to the first modification, viewed from the right. As shown in FIG. 4, the heat radiation member 21 may be supported by the cover 2b of the case 2. Moreover, the movable contact piece 10 may be formed into a substantially T-shape when viewed from the front.

FIG. 5 is a schematic diagram of the contact device 3 of the electromagnetic relay 100 according to the second modification, viewed from the right. The heat dissipation member 21 may be arranged at a position biased toward either the movable contact 10a or the movable contact 10b. In this case, one contact can be brought into contact or separated before the other contact. In FIG. 5, the heat dissipation member 21 is arranged at a position biased toward the movable contact 10b. In this case, for example, the movable contact 10a and the fixed contact 6a can be brought into contact before the movable contact 10b and the fixed contact 7a come into contact. Note that the card member 11a is configured so that an even pressing force is applied to the movable contact 10a and the movable contact 10b in the contact direction Z1.

FIG. 6 is a schematic diagram of the inside of the electromagnetic relay 100 according to the third modification, viewed from above. The electromagnetic relay 100 may further include permanent magnets 25a and 25b and a yoke 26. Permanent magnets 25a and 25b are arranged around case 2 and generate a magnetic field within case 2. Permanent magnets 25a and 25b are supported by case 2. Permanent magnet 25a and permanent magnet 25b are arranged to face each other in the front-rear direction.

The yoke 26 has a substantially U-shape and is connected to the permanent magnets 25a, 25b so as to surround the permanent magnets 25a, 25b. The heat radiation member 21 is placed in contact with the yoke 26. A portion of the yoke 26 may be exposed to the outside. The heat radiation member 21 is fixed to the yoke 26 or the case 2. The other configurations are the same as those of the previous embodiment. In this case, the heat generated by the movable contact piece 10 can be radiated from the yoke 26 via the heat radiating member 21.

FIG. 7 is a schematic diagram of the contact device 3 of the electromagnetic relay 100 according to the fourth modification, viewed from the right. The electromagnetic relay 100 may further include a heat radiation member 22. The heat radiation member 22 has the same shape as the heat radiation member 21. The heat radiating member 22 is arranged with a distance from the heat radiating member 22 in the front-rear direction. The heat dissipation member 21 is arranged outside (in front) of the movable contact 10a. The heat dissipation member 22 is arranged outside (backward) of the movable contact 10b. The heat dissipation member 21 does not contact the movable contact piece 10 when the movable contact piece 10 is in the open position, but contacts the movable contact piece 10 when the movable contact piece 10 is in the contact position, and closes the movable contact piece 10. radiates heat. In this case, since a plurality of heat radiating members 21 and 22 are provided, the heat radiating performance of the movable contact piece 10 can be further improved. Note that the heat dissipation member 21 may be arranged inside the movable contact 10a. The heat radiation member 22 may be arranged inside the movable contact 10b.

When the electromagnetic relay 100 includes a plurality of heat radiating members 21 and 22, the heat radiating members 21 and 22 may be arranged in a staggered manner, for example, as shown in FIG. Thereby, like the second modification, one contact can be brought into contact or separated before the other contact. In the example shown in FIG. 8 , the heat dissipation member 22 contacts the movable contact piece 10 before the heat dissipation member 21 contacts the movable contact piece 10 . In addition, in FIG. 8, the heat radiating members 21 and 22 are shown in a straight line in order to make the drawing easier to see.

FIG. 9 is a schematic cross-sectional view of the vicinity of the contact device 103 of the electromagnetic relay 200 according to the fifth modification. 10(A) and 10(B) are schematic diagrams of the contact device 103 viewed from the left. The fifth modification is an example in which the present invention is applied to a plunger type electromagnetic relay 200. The other configurations are the same as the conventional configuration, and therefore will be explained in a simplified manner. The electromagnetic relay 200 includes a case 102, a contact device 103, and a drive device (not shown). The case 102 has a substantially rectangular box shape and is made of an insulating material such as resin. Contact device 103 includes fixed terminals 106 and 107, a movable contact piece 110, and a heat radiation member 121.

Fixed terminal 106 includes fixed contact 106a. Fixed terminal 107 includes fixed contact 107a. The fixed terminal 107 is spaced apart from the fixed terminal 106 in the left-right direction. Movable contact piece 110 extends in the left-right direction. The movable contact piece 110 includes a movable contact 110a capable of contacting the fixed contact 106a and a movable contact 110b capable of contacting the fixed contact 107a. Although the fixed terminals 106 and 107 have a cylindrical shape, the fixed terminals 106 and 107 may also be plate-shaped terminals.

Movable mechanism 111 includes a drive shaft 120. The drive shaft 120 extends along the contact direction Z1 and the separation direction Z2. The drive shaft 120 is connected to the movable contact piece 110. The drive device uses electromagnetic force to move the drive shaft 120 in the contact direction Z1 and the separation direction Z2. The operation of the electromagnetic relay 200 is the same as the conventional one, so a description thereof will be omitted.

The heat radiation member 121 is supported by the case 102. The heat dissipation member 121 is arranged in a position that does not overlap the drive shaft 120 in the vertical direction and at a position that at least partially overlaps the movable contact piece 110. The heat dissipating member 121 may be exposed to the outside from the case 2 or may be in contact with a yoke (not shown).

The heat radiation member 121 is arranged at a position where it does not contact the movable contact piece 110 when the movable contact piece 110 is in the open position shown in FIG. 10(A). The heat dissipation member 121 is arranged at a position away from the movable contact piece 110 when the movable contact piece 110 is in the open position. The heat radiating member 121 contacts the movable contact piece 110 and radiates the heat generated by the movable contact piece 110 when the movable contact piece 110 is at the contact position shown in FIG. 10(B). Note that, as shown in FIGS. 11 and 12, the heat dissipation member 121 may be placed at a position biased toward either the movable contact 110a or the movable contact 110b.

As shown in FIG. 13, the electromagnetic relay 200 may further include a heat dissipation member 122. The heat dissipation member 121 is disposed biased toward either the movable contact 110a or the movable contact 110b, and the heat dissipation member 122 is disposed biased toward the other of the movable contact 110a or the movable contact 110b. Even in this case, as shown in FIG. 14, the heat radiating members 121 and 122 may be arranged in a staggered manner. For example, in the example shown in FIG. 14, the heat radiating member 122 contacts the movable contact piece 110 before the heat radiating member 121 contacts the movable contact piece 110.

As shown in FIG. 15, the electromagnetic relay 100 may further include an insulating wall 28 provided around the heat radiating member 21. The insulating wall 28 protects the heat radiating member 21 from arcs generated between the fixed contacts 6a, 7a and the movable contacts 10a, 10b. The insulating wall 28 is formed integrally with the case 2, for example. The shape of the insulating wall 28 may be changed as appropriate depending on the arrangement of the permanent magnets 25a, 25b, etc. Note that the insulating wall 28 may also be provided around the heat radiating members 22, 121, 122 described above.

The heat dissipation member 21 may be conductive, and may be in contact with the movable contact piece 10 at a plurality of locations, for example, as shown in FIG. 16. Specifically, the heat dissipation member 21 may include a first contact portion 21a and a second contact portion 21b. The first contact portion 21a and the second contact portion 21b contact the movable contact piece 10 when the movable contact piece 10 is in the contact position. The second contact portion 21b is arranged at a position away from the first contact portion 21a. The first contact portion 21a and the second contact portion 21b are arranged between the movable contact 10a and the movable contact 10b. In this case, since the heat dissipation member 21 also functions as an electric path, the number of electric paths increases and the heat generation of the movable contact piece 10 can be further suppressed.

As shown in FIG. 17, the heat dissipation member 21 may include a main body portion 21c and a contact portion 21d. The contact portion 21d projects toward the movable contact piece 10 from the main body portion 21c. The contact portion 21d may be integrated with the main body portion 21c or may be a separate body. In this case, the contact between the movable contact piece 10 and the heat radiating member 21 is stabilized.

According to the present invention, in an electromagnetic relay, the heat dissipation of the movable contact piece can be improved while suppressing an increase in the weight of the movable contact piece.

2 Case 4 Drive device 6 Fixed terminal (an example of the first fixed terminal)
6a Fixed contact (an example of the first fixed contact)
7 Fixed terminal (an example of the second fixed terminal)
7a Fixed contact (an example of the second fixed contact)
10 Movable contact piece 10a Movable contact (an example of the first movable contact)
10b Movable contact (an example of the second movable contact)
11 Movable mechanism 21 Heat radiation member (an example of the first heat radiation member)
22 Heat dissipation member (an example of the second heat dissipation member)
25a, 25b Permanent magnet 26 Yoke 100 Electromagnetic relay

Claims (11)

a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact capable of contacting the first fixed contact;
a movable mechanism that moves the movable contact piece between a contact position where the first movable contact contacts the first fixed contact and a separation position where the first movable contact separates from the first fixed contact;
a drive device that operates the movable mechanism by electromagnetic force;
When the movable contact piece is in the open position, the movable contact piece does not contact the movable contact piece, and when the movable contact piece is in the contact position, the movable contact piece contacts the movable contact piece to generate heat in the movable contact piece. a first heat radiating member that radiates heat;
Equipped with
The first heat dissipation member has a spring property and is bent in a direction in which the first movable contact contacts the first fixed contact.
Electromagnetic relay. a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact capable of contacting the first fixed contact;
a movable mechanism that moves the movable contact piece between a contact position where the first movable contact contacts the first fixed contact and a separation position where the first movable contact separates from the first fixed contact;
a drive device that operates the movable mechanism by electromagnetic force;
When the movable contact piece is in the open position, the movable contact piece does not contact the movable contact piece, and when the movable contact piece is in the contact position, the movable contact piece contacts the movable contact piece to generate heat in the movable contact piece. a first heat radiating member that radiates heat;
a case that accommodates the first fixed contact and the first movable contact ;
Equipped with
the first heat radiating member is exposed to the outside from the case;
Electromagnetic relay. a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact capable of contacting the first fixed contact;
a movable mechanism that moves the movable contact piece between a contact position where the first movable contact contacts the first fixed contact and a separation position where the first movable contact separates from the first fixed contact;
a drive device that operates the movable mechanism by electromagnetic force;
When the movable contact piece is in the open position, the movable contact piece does not contact the movable contact piece, and when the movable contact piece is in the contact position, the movable contact piece contacts the movable contact piece to generate heat in the movable contact piece. a first heat radiating member that radiates heat;
a case that accommodates the first fixed contact and the first movable contact;
a permanent magnet that generates a magnetic field within the case;
a yoke connected to the permanent magnet;
Equipped with
the first heat radiating member is placed in contact with the yoke;
Electromagnetic relay. a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact capable of contacting the first fixed contact;
a movable mechanism that moves the movable contact piece between a contact position where the first movable contact contacts the first fixed contact and a separation position where the first movable contact separates from the first fixed contact;
a drive device that operates the movable mechanism by electromagnetic force;
When the movable contact piece is in the open position, the movable contact piece does not contact the movable contact piece, and when the movable contact piece is in the contact position, the movable contact piece contacts the movable contact piece to generate heat in the movable contact piece. a first heat radiating member that radiates heat;
an insulating wall provided around the first heat radiating member to protect the first heat radiating member from an arc generated between the first fixed contact and the first movable contact ;
Equipped with
Electromagnetic relay. a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact capable of contacting the first fixed contact;
a movable mechanism that moves the movable contact piece between a contact position where the first movable contact contacts the first fixed contact and a separation position where the first movable contact separates from the first fixed contact;
a drive device that operates the movable mechanism by electromagnetic force;
When the movable contact piece is in the open position, the movable contact piece does not contact the movable contact piece, and when the movable contact piece is in the contact position, the movable contact piece contacts the movable contact piece to generate heat in the movable contact piece. a first heat radiating member that radiates heat;
a second fixed terminal including a second fixed contact and arranged at a distance from the first fixed terminal ;
Equipped with
The movable contact piece includes a second movable contact that can contact the second fixed contact,
The second movable contact contacts the second fixed contact when the movable contact piece is in the contact position, and separates from the second fixed contact when the movable contact piece is in the open position,
The first heat radiating member is electrically conductive, and includes a first contact portion that contacts the movable contact piece when the movable contact piece is in the contact position, and a first heat dissipation member that is arranged at a position away from the first contact portion and has a first contact portion that contacts the movable contact piece when the movable contact piece is in the contact position. a second contact portion that contacts the movable contact piece when the movable contact piece is in the contact position,
The first contact part and the second contact part are arranged between the first movable contact and the second movable contact,
Electromagnetic relay. The first heat dissipation member is bent in a direction in which the first movable contact contacts the first fixed contact.
The electromagnetic relay according to any one of claims 2 to 5 . The first heat dissipation member contacts the movable contact piece before the first movable contact contacts the first fixed contact.
The electromagnetic relay according to any one of claims 1 to 6 . The first heat radiating member is made of the same material as the movable contact piece or a material with higher thermal conductivity than the movable contact piece.
The electromagnetic relay according to any one of claims 1 to 7 . The first heat dissipation member includes a main body portion and a contact portion protruding from the main body portion toward the movable contact piece,
the contact portion contacts the movable contact piece when the movable contact piece is in the contact position;
The electromagnetic relay according to any one of claims 1 to 8 . a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact capable of contacting the first fixed contact;
a movable mechanism that moves the movable contact piece between a contact position where the first movable contact contacts the first fixed contact and a separation position where the first movable contact separates from the first fixed contact;
a drive device that operates the movable mechanism by electromagnetic force;
When the movable contact piece is in the open position, the movable contact piece does not contact the movable contact piece, and when the movable contact piece is in the contact position, the movable contact piece contacts the movable contact piece to generate heat in the movable contact piece. a first heat radiating member that radiates heat;
a second fixed terminal including a second fixed contact and arranged at a distance from the first fixed terminal ;
Equipped with
The movable contact piece includes a second movable contact that can contact the second fixed contact,
The second movable contact contacts the second fixed contact when the movable contact piece is in the contact position, and separates from the second fixed contact when the movable contact piece is in the open position,
The first heat dissipation member is disposed at a position biased toward either the first movable contact or the second movable contact ,
The first heat dissipation member contacts the movable contact piece before the first movable contact contacts the first fixed contact.
Electromagnetic relay. a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact capable of contacting the first fixed contact;
a movable mechanism that moves the movable contact piece between a contact position where the first movable contact contacts the first fixed contact and a separation position where the first movable contact separates from the first fixed contact;
a drive device that operates the movable mechanism by electromagnetic force;
When the movable contact piece is in the open position, the movable contact piece does not contact the movable contact piece, and when the movable contact piece is in the contact position, the movable contact piece contacts the movable contact piece to generate heat in the movable contact piece. a first heat radiating member that radiates heat;
The movable contact piece is arranged at a distance from the first heat dissipating member, and does not contact the movable contact piece when the movable contact piece is in the open position, and does not contact the movable contact piece when the movable contact piece is in the contact position. a second heat radiating member that contacts the contact piece and radiates heat generated by the movable contact piece ;
Equipped with
The second heat radiating member contacts the movable contact piece before the first heat radiating member contacts the movable contact piece,
The first heat dissipation member includes a main body portion and a contact portion protruding from the main body portion toward the movable contact piece,
the contact portion contacts the movable contact piece when the movable contact piece is in the contact position;
Electromagnetic relay.

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