JP6685024B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to an electromagnetic relay.

  2. Description of the Related Art Conventionally, there is known a contact device in which a movable contact is brought into contact with and separated from a fixed contact (for example, see Patent Document 1). The contact device described in Patent Document 1 includes a holder that holds the movable contactor, and a movable shaft that is connected to the holder.

JP, 2012-22928, A

  By the way, in the conventional contact device described in Patent Document 1, the contact holder (holding body) contacts the inner surface of the base to regulate the rotation of the contact holder and the movable contact.

  However, in the conventional contact device described in Patent Document 1, when the contact holder and the movable contact are rotated, the distance between the movable contact and the inner surface of the base becomes short, and the arc space required for interruption is formed. There was a problem that was narrowed.

  The present invention is an invention made in view of the above points, and an object of the present invention is to provide an electromagnetic relay capable of securing an arc space and suppressing an arc fault while having a simple configuration. It is in.

The electromagnetic relay of the present invention extends along a fixed contact, a movable contact having a movable contact arranged to face the fixed contact, and a second axis orthogonal to the first axis. A movable shaft arranged to move the movable contact along the second axis to bring the movable contact into contact with and separate from the fixed contact in accordance with an energization state of a drive device, the fixed contact and the movable shaft. An electromagnetic relay including a base that houses a contactor. The base extends along the first axis and is located on a pair of inner walls facing each other on a third axis orthogonal to the first axis and the second axis, and one inner wall of the pair of inner walls, A first projecting portion projecting toward the other inner wall along the third axis, and a first projecting portion located on the other inner wall of the pair of inner walls and projecting toward the one inner wall along the third axis. 2 protrusions. The movable contact is rotatably provided around the second axis. The first protruding portion is arranged so as to restrict rotation of the movable contactor when the movable contactor rotates clockwise when viewed from the fixed contact side along the second axis. The second projecting portion is arranged so as to restrict rotation of the movable contactor when the movable contactor rotates counterclockwise when viewed from the fixed contact side along the second axis. .
Further, the contact device of the present invention is arranged in the first direction with respect to the movable shaft that moves in the second direction out of the first direction and the second direction that are orthogonal to each other. A fixed contact, a movable contactor that contacts and separates from the fixed contact, and the movable contactor that holds the movable contactor in the second direction by the movable shaft so that the movable contactor contacts and separates from the fixed contact. A contactor holder that is moved, a base that houses the fixed contact, the movable contactor, and the contactor holder, and a direction orthogonal to both the first direction and the second direction is a third direction. In this case, the base is provided on each of a pair of inner surfaces facing each other in the third direction, and includes a protrusion protruding from each inner surface of the base in the third direction. In one region of the internal space of the base that is divided into two parts on a plane that passes through the movable axis and is orthogonal to the first direction, both sides of the tip of the protrusion on the inner surface of the base in the first direction. Is provided with a pair of side surfaces located on the opposite side of the movable contactor in the third direction with respect to the tip of the protrusion. When the movable contact is rotated in one direction around the movable shaft, at least one tip end surface of the protrusion is brought into contact with the contact holder or the movable contact.

  In this contact device, the width of the lower region of the contact holder is preferably larger than the width of the upper region of the contact holder in the third direction.

  In this contact device, it is preferable that at least a tip end surface of the protrusion is a curved surface, and a surface of the contact holder that faces the protrusion is a flat surface.

  In this contact device, it is preferable that the contact holder has a convex region at a position facing the protrusion.

  In this contact device, it is preferable that the contact holder includes a resin member that abuts the protrusion.

  In this contact device, it is preferable that a plurality of the protrusions are provided on the base in a line in the first direction.

  In this contact device, it is preferable that a pair of the protrusions be provided on a pair of inner surfaces of the base that face each other in the third direction.

  An electromagnetic relay of the present invention includes the contact device and a drive device that drives the movable shaft so that the movable contactor comes into contact with and separates from the fixed contact.

  In the present invention, it is possible to secure an arc space and suppress arcing.

FIG. 3 is a cross-sectional view of the electromagnetic relay according to the first embodiment taken along the line AA of FIG. 2. 3 is an external perspective view of the electromagnetic relay according to the first embodiment. FIG. It is sectional drawing of the electromagnetic relay which concerns on Embodiment 1 of the BB line of FIG. It is sectional drawing of the electromagnetic relay which concerns on Embodiment 1 of the CC line of FIG. 3 is a cross-sectional view of a state in which a movable contact is rotating in the electromagnetic relay according to the first embodiment. FIG. 3 is a cross-sectional view of a state in which a movable contact is rotating in the electromagnetic relay according to the first embodiment. FIG. 3 is an enlarged view of a main part of the electromagnetic relay according to the first embodiment. FIG. It is sectional drawing of the electromagnetic relay which concerns on the modification of Embodiment 1. FIG. 6 is a cross-sectional view of an electromagnetic relay according to another modification of the first embodiment. It is an enlarged view of the principal part of the electromagnetic relay which concerns on Embodiment 2.

(Embodiment 1)
As shown in FIGS. 1 to 3, the electromagnetic relay 1 according to the first embodiment includes a contact device 2, a drive device 3, and a hollow box-type housing 4. The contact device 2 and the drive device 3 are housed in the housing 4.

  The contact device 2 includes a pair of fixed terminals 21, a movable contact 22, a contact pressure spring 23, a spring receiving portion 24, a movable shaft 25, an adjusting portion 26, a yoke 27, a contact holder 28, and a contact holder 28. The base (case) 51, the connecting body 52, and the insulating member 53 are provided.

  Each of the pair of fixed terminals 21 is formed of a conductive material such as copper into a substantially cylindrical shape. A fixed contact 211 is provided at the lower end of each fixed terminal 21. Each fixed terminal 21 is provided by being inserted into the through hole 511 of the base 51, and is joined to the base 51 by brazing with the upper end thereof protruding from the upper surface of the base 51.

  The pair of fixed contacts 211 are fixed to the lower ends of the pair of fixed terminals 21. The pair of fixed contacts 211 are arranged in the first direction (the left-right direction in FIG. 3). Each fixed contact 211 may be formed integrally with the fixed terminal 21.

The movable contact 22 comes into contact with and separates from the pair of fixed contacts 211. More specifically, the movable contact 22 comes into contact with and separates from the pair of fixed contacts 211 in a second direction (vertical direction in FIG. 3) orthogonal to the first direction (horizontal direction in FIG. 3). The movable contact 22 is formed in a flat plate shape that is long in the left-right direction (the left-right direction in FIG. 3), and has movable contacts 221 on the left and right ends of the upper surface. That is, the pair of movable contacts 221 are both end portions of the movable contact 22 in the left-right direction. The pair of movable contacts 221 are
It is formed at a position facing the pair of fixed contacts 211 with a predetermined gap. Further, the movable contact 22 is provided with a yoke 27 so as to be fitted in a substantially central portion in the left-right direction (left-right direction in FIG. 3).

  The contact pressure spring 23 is composed of a coil spring, and is arranged between the spring receiving portion 24 and the yoke 27 in a state where the expansion / contraction direction is directed in the vertical direction. The contacting spring 23 is positioned with respect to the yoke 27 and the movable contact 22 by fitting the positioning protrusion 271 of the yoke 27 into the inner diameter of the upper end of the contacting spring 23.

  The spring receiving portion 24 is formed in a substantially rectangular plate shape with a material having electrical insulation such as resin. A substantially disk-shaped positioning projection 242 is formed in the center of the upper surface of the base 241 of the spring receiving portion 24. The spring receiving portion 24 is positioned with respect to the contact pressure spring 23 by fitting the positioning projection 242 of the spring receiving portion 24 into the inner diameter portion of the lower end side of the contact pressure spring 23.

  The movable shaft 25 moves the contact holder 28 in the second direction so that the movable contact 22 comes into contact with and separates from the pair of fixed contacts 211. In other words, the movable shaft 25 moves in the axial direction (vertical direction in FIG. 3) so that the movable contact 22 comes in contact with and separates from the pair of fixed contacts 211. That is, the movable shaft 25 is connected to the contact holder 28 and moves in the second direction so that the movable contact 22 comes into contact with and separates from the pair of fixed contacts 211. The movable shaft 25 is formed in a substantially round bar shape that is long in the vertical direction. The movable iron core 34 of the drive device 3 is connected to the lower end of the movable shaft 25. The upper end of the movable shaft 25 is connected to the spring bearing portion 24. The movable shaft 25 is fixed to the movable iron core 34 while being inserted into the through hole 331 of the fixed iron core 33, the return spring 36, and the through hole 341 of the movable iron core 34.

  The adjusting portion 26 is made of a magnetic material and is formed in, for example, a substantially rectangular plate shape. Then, the adjusting portion 26 is mounted on the upper surface of the movable contact 22 in the substantially central portion in the left-right direction, and is fixed to the contact holder 28. The adjusting portion 26 is not limited to being formed in a plate shape, and may be formed in another shape.

  The yoke 27 is made of a magnetic material, and is formed in a substantially U-shaped cross section with an opening at the top when viewed in the left-right direction. The yoke 27 is arranged below the substantially central portion of the movable contact 22 so as to sandwich the approximately central portion of the movable contact 22 from the front-rear direction. In addition, a substantially disk-shaped positioning convex portion 271 is formed substantially at the center of the lower surface of the yoke 27.

  The contactor holder 28 holds the movable contactor 22, as shown in FIG. The contact holder 28 includes a pair of holding portions 281. Each holding portion 281 includes a bottom portion 282 and side portions 283. The bottom portion 282 and the side portions 283 are formed by bending a non-magnetic material. The pair of holding portions 281 are integrally formed with the spring receiving portion 24 while being separated from each other in the front-rear direction. A spring receiving portion 24 is interposed between the bottom portion 282 and the side portion 283 and the contact pressure spring 23. That is, the spring receiving portion 24 electrically insulates the bottom portion 282 from the contact pressure spring 23.

  The pair of bottom portions 282 sandwich the movable contact 22, the yoke 27, and the contact pressure spring 23 in the vertical direction together with the adjusting portion 26. Therefore, the movable contact 22 is pressed upward by the contact pressure spring 23, and the upper surface of the movable contact 22 comes into contact with the adjusting portion 26, whereby the movement toward the fixed contact 211 side is restricted. The side portion 283 is provided so as to extend upward from the end portion of the bottom portion 282. The pair of side portions 283 are opposed to each other in the front-rear direction (left-right direction in FIG. 6). The movable contact 22 and the yoke 27 are in sliding contact with each side portion 283. When the side portions 283 come into contact with the adjustment portion 26, the pair of side portions 283 sandwich the adjustment portion 26 in the front-rear direction. Each bottom portion 282 is formed in, for example, a plate shape. However, each bottom portion 282 is not limited to being formed in a plate shape, and may be formed in another shape. Each side portion 283 is formed in a plate shape, for example. However, each side portion 283 is not limited to being formed in a plate shape, and may be formed in another shape.

  The adjusting portion 26 provided above the movable contact 22 and the yoke 27 provided below the movable contact 22 are made of a magnetic material, and the contact holder 28 is made of a non-magnetic material. ing. As a result, when the fixed contact 211 and the movable contact 221 come into contact with each other and a current flows through the movable contact 22, the magnetic flux passing around the movable contact 22 and passing through the adjusting portion 26 and the yoke 27 around the movable contact 22. Is formed. Then, a magnetic attractive force acts between the adjusting portion 26 and the yoke 27, and this magnetic attractive force suppresses the electromagnetic repulsive force generated between the fixed contact 211 and the movable contact 221, and the fixed contact 211 and the movable contact 221. Suppresses a decrease in contact pressure between and.

  As shown in FIG. 3, the base 51 is formed of a heat-resistant material such as ceramics in the shape of a hollow box whose lower surface is opened. The base 51 accommodates the pair of fixed contacts 211, the movable contact 22 and the contact holder 28. Two through holes 511 are formed on the upper surface of the base 51 so as to be aligned in the left-right direction.

  The first end of the connecting body 52 is joined to the opening peripheral edge of the base 51 by brazing. The second end of the connecting body 52 is joined to the first yoke plate 351 of the yoke 35 of the drive device 3 by brazing.

  The insulating member 53 includes a bottom surface portion 531 and a protruding portion 532. An insertion hole 533 into which the movable shaft 25 is inserted is formed at approximately the center of the bottom surface portion 531. The insulating member 53 is formed of an insulating material such as ceramic or synthetic resin into a substantially hollow rectangular parallelepiped shape having an open upper surface, and the upper end side of the peripheral wall contacts the inner surface of the peripheral wall of the base 51. As a result, the insulating member 53 insulates the arc generated between the fixed contact 211 and the movable contact 221 at the opening of the base 51 from the joint between the base 51 and the coupling body 52.

  By the way, in the contact device 2 of the present embodiment, the spring receiving portion 24 is arranged on the side of the movable contact 22 opposite to the pair of fixed contacts 211. The spring receiver 24 includes a base 241, a positioning protrusion 242, a protrusion 243, and a partition wall 244. The partition wall 244 is provided around the movable shaft 25. More specifically, the partition wall 244 is formed, for example, in a cylindrical shape, and is provided so as to extend from the base portion 241 toward the insulating member 53 along the axial direction of the movable shaft 25.

  By providing the partition wall 244 as described above, it is possible to reduce the intrusion of foreign matter generated by the contact and separation of the fixed contact 211 and the movable contact 22 into the insertion hole 533.

  By the way, the contact device 2 of the present embodiment includes a plurality of (four in FIG. 1) protrusions 512 to 515 as shown in FIG. Each of the plurality of protrusions 512 to 515 is a third direction (of FIG. 1) that is orthogonal to both the first direction (the left-right direction of FIG. 1) and the second direction (the direction of the paper of FIG. 1). In the up and down direction), it projects in a third direction from a position of the base 51 facing the contact holder 28.

  Further, in the contactor holder 28, as shown in FIG. 6, the width of the lower region of the contactor holder 28 is larger than the width of the upper region of the contactor holder 28 in the third direction (the horizontal direction of FIG. 6). . More specifically, in the contactor holder 28, the pair of holding portions 281 have a plurality of convex regions 284 to 287 at positions facing the plurality of protruding portions 512 to 515.

  Furthermore, each of the plurality of protrusions 512 to 515 is a curved surface. On the other hand, the surface of the contact holder 28 facing the protrusions 512 to 515 is a flat surface. This makes it possible to realize stable contact between the curved surface and the flat surface.

  Next, the operation of the contact device 2 according to this embodiment will be described with reference to FIG. First, when the movable shaft 25 is displaced upward by the drive device 3, the spring bearing portion 24 and the contact holder 28 connected to the movable shaft 25 are displaced upward as the movable shaft 25 is displaced. The movable contact 22 moves upward with the displacement of the spring receiver 24 and the contact holder 28. Then, the movable contact 22 comes into contact with the pair of fixed contacts 211 to establish conduction between the contacts.

  In such an operation of the contact device 2, when the movable contact 22 and the contact holder 28 rotate clockwise around the movable shaft 25, as shown in FIG. The convex region 284 abuts on the protrusion 512 and the convex region 287 abuts on the protrusion 515 without contacting the inner surface of the base 51. On the other hand, when the movable contact 22 and the contact holder 28 rotate counterclockwise about the movable shaft 25, the movable contact 22 and the contact holder 28 do not contact the inner surface of the base 51, and the convex area 285 is formed. Touches the protrusion 513, and the convex region 286 contacts the protrusion 514.

  Next, the drive device 3 will be described in detail with reference to FIG.

  The driving device 3 is an electromagnet block, and drives the movable shaft 25 so that the movable contact 22 comes into contact with and separates from the pair of fixed contacts 211, as shown in FIG.

  The drive device 3 includes an excitation winding 31, a coil bobbin 32, a fixed iron core 33, a movable iron core 34, a yoke 35, a return spring 36, a cylindrical member 37, and a bush 38. The drive device 3 also includes a pair of coil terminals to which both ends of the excitation winding 31 are connected.

  The coil bobbin 32 is formed in a substantially cylindrical shape with flanges 321 and 322 formed on the upper and lower ends of a resin material, and the exciting winding 31 is wound around a cylindrical portion 323 between the flanges 321 and 322. Further, the inner diameter on the lower end side of the cylindrical portion 323 is larger than the inner diameter on the upper end side.

  The excitation winding 31 has ends connected to a pair of terminal portions provided on the collar portion 321 of the coil bobbin 32, and is connected to a pair of coil terminals via lead wires connected to the terminal portions. Each coil terminal is made of a conductive material such as copper and is connected to a lead wire by soldering or the like.

  The fixed iron core 33 is formed of a magnetic material in a substantially cylindrical shape, and is arranged and fixed in the coil bobbin 32. More specifically, the fixed iron core 33 is provided in the cylindrical member 37 housed in the cylindrical portion 323 of the coil bobbin 32.

  The movable iron core 34 is formed of a magnetic material in a substantially cylindrical shape, and is arranged in the coil bobbin 32 so as to face the fixed iron core 33 in the axial direction. More specifically, the movable iron core 34 is provided inside the cylindrical member 37. The movable iron core 34 is fixed to the movable shaft 25 and moves in the up-down direction according to the energization of the excitation winding 31. More specifically, when the excitation winding 31 is energized, the movable iron core 34 moves upward. On the other hand, when the excitation coil 31 is de-energized, the movable iron core 34 moves downward.

  The yoke 35 includes a first yoke plate 351, a second yoke plate 352, and a pair of third yoke plates 353. The first yoke plate 351 is provided on the upper end side of the coil bobbin 32. The second yoke plate 352 is provided on the lower end side of the coil bobbin 32. The pair of third yoke plates 353 are provided to extend from the left and right ends of the second yoke plate 352 to the first yoke plate 351 side. The first yoke plate 351 is formed in a substantially rectangular plate shape. An insertion hole 354 is formed substantially at the center of the upper surface of the first yoke plate 351. The upper end of the fixed iron core 33 is inserted into the insertion hole 354.

  The return spring 36 is inserted into the lower portion of the through hole 331 of the fixed iron core 33 and the upper portion of the through hole 341 of the movable iron core 34. The return spring 36 is provided in a compressed state between the fixed iron core 33 and the movable iron core 34, and elastically biases the movable iron core 34 downward.

  The cylindrical member 37 is formed in a cylindrical shape with a bottom, and is housed in the cylindrical portion 323 of the coil bobbin 32. A flange portion 371 is formed on the upper end of the cylindrical member 37. The collar portion 371 is located between the collar portion 321 of the coil bobbin 32 and the first yoke plate 351. Here, the movable iron core 34 is provided on the lower end side inside the cylindrical portion 372 of the cylindrical member 37. Further, the fixed iron core 33 is provided in the cylindrical portion 372.

  The bush 38 is formed of a magnetic material in a cylindrical shape. The bush 38 is fitted in a gap portion formed between the inner peripheral surface of the coil bobbin 32 on the lower end side and the outer peripheral surface of the cylindrical member 37. The bush 38 forms a magnetic circuit together with the first to third yoke plates 351 to 353, the fixed iron core 33, and the movable iron core 34.

  Next, the housing 4 will be described in detail with reference to FIGS.

  The housing 4 is formed of a resin material in a substantially rectangular box shape, and includes a hollow box-shaped housing body 41 having an open upper surface, and a hollow box-shaped cover 42 that covers the opening of the housing body 41. There is.

  As shown in FIG. 2, the housing main body 41 is provided with a pair of protrusions 411 formed at the front ends of the left and right side walls and having insertion holes used when fixing the electromagnetic relay 1 to the mounting surface by screwing. . Further, as shown in FIG. 3, a step portion 412 is formed on the opening peripheral edge on the upper end side of the housing body 41, and the inner diameter of the upper end is larger than that of the lower end side.

  The cover 42 is formed in a hollow box shape whose lower surface is open. A partition portion 422 is formed on the upper surface portion 421 of the cover 42 to divide the upper surface portion 421 into left and right parts. A pair of insertion holes 423 through which the fixed terminals 21 are inserted are formed in the upper surface portion 421 divided into two by the partition portion 422.

  When the contact device 2 and the drive device 3 are housed in the housing 4, the lower cushion rubber 43 is interposed between the second yoke plate 352 of the yoke 35 and the bottom surface portion 413 of the housing body 41. To be done. An upper cushion rubber 44 having an insertion hole 441 through which the fixed terminal 21 is inserted is interposed between the base 51 and the cover 42.

  In the electromagnetic relay 1 configured as described above, the movable iron core 34 slides downward due to the urging force of the return spring 36, and the movable shaft 25 also moves downward accordingly. As a result, when the movable contact 22 is pressed downward by the adjusting unit 26, the movable contact 22 moves downward together with the adjusting unit 26. Therefore, the movable contact 221 is separated from the fixed contact 211 in the initial state.

  Then, when the excitation winding 31 is energized and the movable iron core 34 is attracted by the fixed iron core 33 and slides upward, the movable shaft 25 connected to the movable iron core 34 also moves upward in conjunction. As a result, the spring bearing portion 24 (contact holder 28) connected to the movable shaft 25 moves to the fixed contact 211 side, and the movable contact 22 also moves upward as the contact holder 28 moves. Then, the movable contact 221 comes into contact with the fixed contact 211, and the fixed contact 211 and the movable contact 221 are electrically connected.

  When the excitation coil 31 is de-energized, the movable core 34 slides downward due to the biasing force of the return spring 36, and the movable shaft 25 also moves downward. As a result, the spring receiver 24 (contact holder 28) also moves downward, and the movable contact 22 also moves downward in accordance with the movement of the contact holder 28, so that the fixed contact 211 and the movable contact 221 are separated from each other. To do.

  In addition, in the contact device 2 of the electromagnetic relay 1 of the present embodiment, the pair of movable contacts 221 is a part of the movable contact 22 and is provided integrally with the movable contact 22. As a modification, the pair of movable contacts may be provided separately from the movable contact 22. In such a contact device 2 as well, the movable contact provided separately from the movable contact 22 moves integrally with the movable contact 22 due to the movement of the movable shaft 25, and the movable contact comes in contact with and separates from the fixed contact 211. To do.

  In the contact device 2 according to the present embodiment described above, when the movable contact 22 and the contact holder 28 rotate around the movable shaft 25, the contact holder 28 contacts the protrusions 512 to 515. As a result, even if the movable contact 22 is in the rotation-restricted state, a sufficient space can be secured in the base 51 between the movable contact 22 and the base 51. As a result, it is possible to secure an arc space for extending the arc generated between the pair of fixed contacts 211 and the movable contact 22, and it is possible to suppress arcing.

  In the contact device 2 according to this embodiment, when the movable contact 22 and the contact holder 28 rotate around the movable shaft 25, the contact holder 28 contacts the protrusions 512 to 515. As a result, even if the movable contact 22 is in a rotation-restricted state, a sufficient space can be secured between the movable contact 22 and the base 51 in the upper region of the base 51, so that the arc space is reduced. It can be sufficiently secured, and the arcing can be further suppressed. In particular, when the base 51 is open at the lower portion, the rotation can be regulated at the base inlet portion (lower portion) having a high shape accuracy, so that the rotation regulation accuracy can be improved.

  In the contact device 2 according to the present embodiment, stable contact between the curved surface and the flat surface can be realized, so that the steering wheel can be prevented from being caught when the rotation is restricted. Particularly, when the base 51 is made of ceramic, it is possible to prevent the ceramic from chipping.

  In the contact device 2 according to the present embodiment, the rotation regulation can be performed by the point contact, so that the accuracy of the rotation regulation can be improved. In particular, when the base 51 is open at the lower portion, the rotation can be regulated at the base inlet portion (lower portion) having a high shape accuracy, so that the rotation regulation accuracy can be improved.

  In addition, in the present embodiment, the contact device 2 is provided with the plurality of protrusions 512 to 515 on the base 51 arranged in the first direction on both inner surfaces of the base 51 facing each other in the third direction. On the other hand, as a modified example of the present embodiment, as shown in FIG. 8, the contact device 2 may include a plurality of protrusions 512 and 513 only on one inner surface of the base 51 facing in the third direction. .

  In the contact device 2 according to the present modification, no matter which of the movable contact 22 and the contact holder 28 rotates around the movable shaft 25, there is sufficient space between the movable contact 22 and the base 51 in the base 51. A space can be secured. As a result, no matter which direction the movable contact 22 rotates, the arc space can be secured and the arc can be suppressed.

  As a modification of the present embodiment, the contact device 2 may include only a pair of protrusions 513 and 515 on a pair of inner surfaces facing each other in the third direction in the base 51, as shown in FIG. 9. Good. That is, the contact device 2 may include one protrusion 513, 515 on each inner surface of the base 51.

  In the contact device 2 according to the present modification, no matter which of the movable contact 22 and the contact holder 28 rotates around the movable shaft 25, there is sufficient space between the movable contact 22 and the base 51 in the base 51. A space can be secured. As a result, no matter which direction the movable contact 22 rotates, the arc space can be secured and the arc can be suppressed.

(Embodiment 2)
As shown in FIG. 10, the contact device 2 according to the second embodiment is different from the contact device 2 according to the first embodiment (see FIG. 3) in that the resin member 29 contacts the protrusions 512 to 515. In addition, about the component similar to the electromagnetic relay 1 (refer FIG. 3) of Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The contact holder 28 of this embodiment includes a plurality of resin members 29. The plurality of resin members 29 are in contact with the plurality of protrusions 512 to 515, respectively. Each resin member 29 is manufactured by simultaneous molding with the metal portion of the contact holder 28. The description of the same functions as the contact holder 28 (see FIG. 6) of the first embodiment will be omitted.

  In the contact device 2 according to the present embodiment described above, the resin member 29 abuts the protrusions 512 to 515, so that the metal is less exposed and the possibility of arc arcing can be reduced. It is possible to suppress the connection.

  It should be noted that each resin member 29 may not be formed simultaneously with the metal portion of the contact holder 28, but may be a member separate from the metal portion of the contact holder 28. In this case, each resin member 29 is attached to the metal portion of the contact holder 28, for example.

DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 2 Contact device 211 Fixed contact 22 Movable contactor 25 Movable shaft 28 Contactor holder 284-287 Convex area 29 Resin member 3 Drive device 51 Base 512-515 Projection part

Claims (12)

Fixed contact,
A movable contactor having a movable contact extending along a first axis and arranged to face the fixed contact;
Extending along a second axis orthogonal to the first axis, the movable contact is moved along the second axis according to the energization state of a drive device to bring the movable contact into contact with and separate from the fixed contact. A movable axis arranged in
A hollow box-shaped base for housing the fixed contact and the movable contact,
An electromagnetic relay comprising:
The peripheral wall forming the base is
A pair of inner surfaces that extend along the first axis and that face each other at a third axis orthogonal to the first axis and the second axis;
The inner surface is
A first protrusion that protrudes from one inner surface of the pair of inner surfaces toward the other inner surface along the third axis;
From the other of the inner surface of the pair of inner surface, and a second protrusion protruding I toward or to the one of the inner surface along said third axis,
Have
The movable contactor is rotatably provided around the second axis,
The first projecting portion is arranged so as to restrict rotation of the movable contactor when the movable contactor rotates clockwise when viewed from the fixed contact side along the second axis,
The second protrusion is arranged so as to restrict rotation of the movable contactor when the movable contactor rotates counterclockwise when viewed from the fixed contact side along the second axis. ,
Electromagnetic relay. The fixed contact has a first fixed contact and a second fixed contact arranged on the first axis,
A position obtained by projecting the center of the first protrusion on the first axis is defined as a first corresponding position,
A position obtained by projecting the central axis of rotation onto the first axis is an axis-corresponding position,
When the position where the center of the first fixed contact is projected on the first axis is defined as the first contact corresponding position,
The first corresponding position is located between the axis corresponding position and the first contact corresponding position,
The electromagnetic relay according to claim 1. The fixed contact has a first fixed contact and a second fixed contact arranged on the first axis,
A position obtained by projecting the center of the second protrusion on the first axis is defined as a second corresponding position,
A position obtained by projecting the central axis of rotation onto the first axis is an axis-corresponding position,
When the position where the center of the first fixed contact is projected on the first axis is defined as the first contact corresponding position,
The second corresponding position is located between the axis corresponding position and the first contact corresponding position,
The electromagnetic relay according to claim 1 or 2. The inner surface is
From the inner surface of the front Symbol hand, a third protrusion protruding toward said the other of the inner surface along the third axis,
From the inner surface of the front SL other hand, a fourth protrusion protruding I toward or to the said one of the inner surface along the third axis,
Has,
The electromagnetic relay according to claim 1. The fixed contact has a first fixed contact and a second fixed contact arranged on the first axis,
A position obtained by projecting the center of the first protrusion on the first axis is defined as a first corresponding position,
A position obtained by projecting the center of the third protrusion on the first axis is defined as a third corresponding position,
A position obtained by projecting the central axis of rotation onto the first axis is an axis-corresponding position,
A position where the center of the first fixed contact is projected on the first axis is defined as a first contact corresponding position,
When the position where the center of the second fixed contact is projected on the first axis is defined as the second contact corresponding position,
The first corresponding position is located between the axis corresponding position and the first contact corresponding position,
The third corresponding position is located between the axis corresponding position and the second contact corresponding position,
The electromagnetic relay according to claim 4. The fixed contact has a first fixed contact and a second fixed contact arranged on the first axis,
A position obtained by projecting the center of the first protrusion on the first axis is defined as a first corresponding position,
A position obtained by projecting the center of the second protrusion on the first axis is defined as a second corresponding position,
A position obtained by projecting the center of the third protrusion on the first axis is defined as a third corresponding position,
A position obtained by projecting the center of the fourth protrusion on the first axis is defined as a fourth corresponding position,
A position obtained by projecting the central axis of rotation onto the first axis is an axis-corresponding position,
A position where the center of the first fixed contact is projected on the first axis is defined as a first contact corresponding position,
When the position where the center of the second fixed contact is projected on the first axis is defined as the second contact corresponding position,
The first corresponding position is located between the axis corresponding position and the first contact corresponding position,
The second corresponding position is located between the axis corresponding position and the first contact corresponding position,
The third corresponding position is located between the axis corresponding position and the second contact corresponding position,
The fourth corresponding position is located between the axis corresponding position and the second contact corresponding position,
The electromagnetic relay according to claim 4. The first protrusion is made of ceramic,
The second protrusion is made of ceramic,
The electromagnetic relay according to claim 1. The tip surface of the first protrusion is a curved surface,
The tip end surface of the second protrusion is a curved surface,
The electromagnetic relay according to any one of claims 1, 2, and 4 to 7. The third protrusion is made of ceramic,
The fourth protrusion is made of ceramic,
The electromagnetic relay according to claim 4. The tip surface of the third protrusion is a curved surface,
The tip end surface of the fourth protrusion is a curved surface,
The electromagnetic relay according to any one of claims 4 to 6 and 9. At least a part of the movable shaft is surrounded by the drive device,
The electromagnetic relay according to claim 1. The drive device includes a coil bobbin having a cylindrical portion, and an excitation winding wound around the cylindrical portion,
A yoke plate arranged on the movable contact side from the coil bobbin,
The electromagnetic relay according to claim 11.

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