JP2020074333A - Electromagnetic relay - Google Patents

Abstract

To efficiently suppress intrusion of a foreign material into an insertion hole into which a movable shaft is inserted.SOLUTION: An electromagnetic relay 1 comprises a fixed contact point 211, a movable contact 22, a movable shaft 25, a contact pressure spring 23, a partition wall member, a first partition wall 534, and a second partition wall 535. The contact pressure spring 23 is provided on the side opposite to the fixed contact 211 with respect to the movable contact 22 and energizes the movable contact toward the fixed contact point 211. The partition wall member is provided around an end of the movable shaft 25 and includes a protrusion part 243 protruding in a cylindrical shape in a first direction along the movable shaft 25. The first partition wall 534 is provided around the movable shaft 25 and protrudes in a second direction opposite to the first direction along the movable shaft 25. The second partition wall 535 is provide around the first partition wall 534 and protrudes in the second direction along the movable shaft 25. The outer diameter of the protrusion part 243 and the inner diameter of the first partition wall 534 are smaller than the outer diameter of the contact pressure spring 23.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an electromagnetic relay.

  Conventionally, an electric contactor (electromagnetic relay) in which a movable contact comes in contact with and separates from a fixed contact has been known (see, for example, Patent Document 1). In the electric contactor described in Patent Document 1, the movable core (movable iron core) displaces the plunger (movable shaft) in the axial direction, and the plunger displaces the contact plate (movable contact) in the axial direction from the retracted position to the operating position. By doing so, the contact plate can be brought into contact with the head (fixed contact) of the terminal in the operating position. Further, the electric contactor described in Patent Document 1 includes a lateral wall portion of the separation plate in order to reduce the movement of foreign matter. The lateral wall portion described in Patent Document 1 is fixed to an inner lateral surface of the cover facing rearward at a communication portion between the front compartment and the rear compartment of the cover.

JP, 10-308152, A

  However, in the conventional electromagnetic relay described in Patent Document 1, since the contact plate is movable with respect to the fixed lateral wall portion, foreign matter is provided in the insertion hole provided in the axial bushing and into which the movable shaft is inserted. There was a problem of invading.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an electromagnetic relay that can efficiently reduce entry of foreign matter into an insertion hole into which a movable shaft is inserted.

  The electromagnetic relay of the present invention includes a fixed contact, a movable contact, a movable shaft, a contact pressure spring, a partition member, a first partition, and a second partition. The movable contact includes a movable contact that extends along a first axis and that faces the fixed contact. The movable shaft extends along a second shaft orthogonal to the first shaft, and moves the movable contactor along the second shaft to fix the movable contact according to the energization state of a drive device. It is arranged so as to be brought into contact with and separated from the contact. The contact pressure spring is provided on the opposite side of the movable contact from the fixed contact, and urges the movable contact toward the fixed contact. The partition wall member includes a protruding portion that is provided around the end of the movable shaft and that protrudes in a cylindrical shape along the movable shaft in the first direction. The first partition wall is provided around the movable shaft and protrudes along the movable shaft in a second direction opposite to the first direction. The second partition is provided around the first partition and projects along the movable shaft in the second direction. The outer diameter of the protrusion and the inner diameter of the first partition wall are smaller than the outer diameter of the contact pressure spring.

  The contact device further includes a second partition wall member that includes a second partition wall that is provided around an insertion hole into which the movable shaft is inserted and that faces the first partition wall member in the axial direction of the movable shaft. Preferably.

  In this contact device, it is preferable that the first partition wall and the second partition wall overlap each other in a direction orthogonal to the axial direction of the movable shaft.

  In this contact device, at least one of the first partition wall and the second partition wall is provided concentrically around the movable shaft, and the first partition wall and the second partition wall are movable. It is preferable that the shafts alternate with each other in a direction orthogonal to the axial direction.

  In this contact device, it is preferable that the leading end of the first partition and the leading end of the second partition face each other in the axial direction.

  In this contact device, it is preferable that the first partition wall includes an extending portion that extends in a direction intersecting with the axial 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 pair of fixed contacts.

  According to the present invention, it is possible to efficiently reduce the entry of foreign matter into the insertion hole into which the movable shaft is inserted. For example, foreign matter can be prevented from entering the drive device through the insertion hole.

FIG. 3 is a cross-sectional view of the electromagnetic relay according to the first embodiment taken along the line AA of FIG. 2. 1 is an external perspective view of an electromagnetic relay according to the first embodiment. It is sectional drawing of the electromagnetic relay which concerns on Embodiment 1 of the BB line of FIG. 3 is an external 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 Embodiment 2. It is sectional drawing of the electromagnetic relay which concerns on Embodiment 3. It is an external view of the principal part of the electromagnetic relay which concerns on Embodiment 3. It is sectional drawing of the electromagnetic relay which concerns on Embodiment 4. It is an external view of the principal part of the electromagnetic relay which concerns on Embodiment 4. It is an external view of the principal part of the electromagnetic relay which concerns on Embodiment 4. It is sectional drawing of the electromagnetic relay which concerns on Embodiment 5. It is sectional drawing of the electromagnetic relay which concerns on Embodiment 6.

(Embodiment 1)
As shown in FIG. 1, 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 housing 4 accommodates the contact device 2 and the drive device 3.

  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 (first partition member), a movable shaft 25, an adjusting portion 26, and a yoke 27. The contact holder 28, the 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 case 51, and is joined to the case 51 by brazing with the upper end thereof protruding from the upper surface of the case 51.

  The pair of fixed contacts 211 are fixed to the lower ends of the pair of fixed terminals 21. Note that 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. 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. 1), 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 formed at positions 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. 1).

  The contact pressure spring 23 is formed of a coil spring, and is arranged between the spring receiving portion 24 and the yoke 27 in a state in which the expansion / contraction direction is oriented 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 an electrically insulating material such as resin. A substantially disk-shaped positioning protrusion 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 protrusion 242 of the spring receiving portion 24 into the inner diameter portion on the lower end side of the contact pressure spring 23.

  The movable shaft 25 moves in the axial direction (vertical direction in FIG. 1) so that the movable contact 22 comes in 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 receiving portion 24. The movable shaft 25 is fixed to the movable iron core 34 with 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 being inserted therethrough.

  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 at a substantially central portion in the left-right direction, and is fixed to the contact holder 28. The adjusting portion 26 is not limited to be 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.

  As shown in FIG. 3, 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 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. 3). 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 a plate shape, for example. However, each bottom portion 282 is not limited to being formed in a plate shape, and may be formed in another shape. Further, 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. Accordingly, 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. 1, the case 51 is formed of a heat-resistant material such as ceramics in the shape of a hollow box whose lower surface is opened. Two through holes 511 are formed on the upper surface of the case 51 so as to be aligned in the left-right direction.

  The first end of the connecting body 52 is joined to the opening edge of the case 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 case 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 case 51 from the joint between the case 51 and the coupling body 52.

  By the way, in the contact device 2 of the present embodiment, as shown in FIG. 4, the spring receiving portion 24 is arranged on the side opposite to the pair of fixed contacts 211 side of the movable contact 22. The spring receiver 24 includes a base 241, a positioning protrusion 242, a protrusion 243, and a partition wall 244 (first partition wall). 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. Then, the partition wall 244 of the present embodiment is interlocked with the movable contact 22 and the movable shaft 25. Here, the interlocking includes not only the movement of another member at the same time when a certain member moves, but also the movement of another member after a slight time delay when a certain member moves. The partition wall 244 may interlock with only the movable contact 22 or only the movable shaft 25.

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

  Then, operation | movement of the contact device 2 which concerns on this embodiment is demonstrated. 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 receiving portion 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.

  Next, the drive device 3 will be described in detail.

  The drive 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.

  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 of a resin material into a substantially cylindrical shape having flanges 321 and 322 formed at its upper and lower ends, 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 its ends connected to a pair of terminal portions provided on the flange 321 of the coil bobbin 32, and is connected to a pair of coil terminals via lead wires connected to the terminal portions. The coil terminal is made of a conductive material such as copper and is connected to the 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 into 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 in 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 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 into 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.

  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 top 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 with insertion holes used when fixing the electromagnetic relay 1 to the mounting surface by screwing. .. Further, as shown in FIG. 1, a step portion 412 is formed at the peripheral edge of the opening 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.

  Further, 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 case 51 and the cover 42.

  In the electromagnetic relay 1 configured as described above, the movable iron core 34 slides downward due to the biasing 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 portion 26, it moves downward together with the adjusting portion 26. Therefore, the movable contact 221 is separated from the fixed contact 211 in the initial state.

  Then, when the exciting 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 to establish electrical continuity between the contacts.

  When the exciting coil 31 is de-energized, the movable iron 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 are a part of the movable contact 22 and are provided integrally with the movable contact 22. As a modification, the pair of movable contacts may be provided separately from the movable contact 22. Also in the contact device 2 as described above, the movable shaft 25 moves to move the movable contact provided separately from the movable contact together with the movable contact 22, and the movable contact comes in contact with and separates from the fixed contact 211. ..

  In the contact device 2 according to the present embodiment described above, the partition wall 244 is provided near the position (contact part) where the movable contact 22 comes into contact with and separates from the pair of fixed contacts 211, that is, the position where foreign matter is generated. Thereby, it is possible to efficiently reduce the entry of foreign matter into the insertion hole 533 of the movable shaft 25 with a simple configuration. That is, it is possible to reduce foreign matter from entering the drive device 3 through the insertion hole 533.

(Embodiment 2)
As shown in FIG. 5, the contact device 2 according to the second embodiment differs from the contact device 2 according to the first embodiment (see FIG. 1) in that a partition wall 534 is provided on the insulating member 53. In addition, about the component similar to the electromagnetic relay 1 (refer FIG. 1) of Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The insulating member 53 of the present embodiment includes a partition wall 534 (second partition wall) provided around the insertion hole 533 into which the movable shaft 25 is inserted. That is, the insulating member 53 includes a bottom surface portion 531, a protruding portion 532, and a partition wall 534. The partition wall 534 is provided so as to extend along the axial direction of the movable shaft 25 from the bottom surface portion 531 toward the spring receiving portion 24 (first partition member). The insulating member 53 faces the spring receiving portion 24 in the axial direction (vertical direction) of the movable shaft 25. The description of the same functions as those of the insulating member 53 (see FIG. 1) of the first embodiment will be omitted.

  In the contact device 2 according to the present embodiment described above, the partition walls 244 and 534 are provided near the location (contact portion) where the movable contact 22 comes into contact with and separates from the pair of fixed contacts 211, that is, the location where foreign matter is generated. With this, it is possible to efficiently reduce the intrusion of foreign matter into the insertion hole of the movable shaft 25 with a simple configuration.

(Embodiment 3)
As shown in FIG. 6, the contact device 2 according to the third embodiment is such that the partition 244 of the spring receiving portion 24 and the partition 534 of the insulating member 53 overlap each other, and thus the contact device 2 according to the second embodiment (see FIG. 5). Is different from. In addition, about the component similar to the electromagnetic relay 1 (refer FIG. 5) of Embodiment 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the present embodiment, the partition 244 (first partition) of the spring receiving portion 24 (first partition member) and the partition 534 (second partition) of the insulating member 53 (second partition member) are provided on the movable shaft 25. It is provided so as to overlap in the direction orthogonal to the axial direction. More specifically, as shown in FIG. 7, the insulating member 53 includes a bottom surface portion 531, a protruding portion 532, and a partition wall 534. The partition wall 534 is provided so as to extend from the bottom surface portion 531 toward the spring receiving portion 24 along the axial direction of the movable shaft 25. The partition wall 244 and the partition wall 534 overlap each other in the direction orthogonal to the axial direction of the movable shaft 25. The description of the same functions as those of the spring receiving portion 24 and the insulating member 53 (see FIG. 5) of the second embodiment will be omitted.

  In the contact device 2 according to the present embodiment described above, the partition wall 244 (first partition wall) of the spring receiving portion 24 and the partition wall 534 (second partition wall) of the insulating member 53 overlap each other, so that the movement path of the foreign matter is long. Therefore, the invasion of foreign matter can be further reduced.

(Embodiment 4)
As shown in FIGS. 8 and 9, the contact device 2 according to the fourth embodiment differs from the contact device 2 according to the third embodiment (see FIG. 6) in that a plurality of partition walls 244, 534 and 535 overlap each other. In addition, about the component similar to the electromagnetic relay 1 (refer FIG. 6) of Embodiment 3, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  A plurality of partitions 534 and 535 of the insulating member 53 of the present embodiment are concentrically provided around the movable shaft 25. That is, as shown in FIG. 10, the insulating member 53 includes a bottom surface portion 531, a protruding portion 532, and two partition walls 534 and 535. Further, in the present embodiment, the partition walls 244 and the partition walls 534 and 535 alternately overlap with each other in the direction orthogonal to the movable shaft 25. The description of the same functions as those of the spring bearing portion 24 and the insulating member 53 (see FIG. 6) of the first embodiment will be omitted.

  In the contact device 2 according to the present embodiment described above, the partition 244 (first partition) of the spring receiving portion 24 and the partitions 534 and 535 (second partition) of the insulating member 53 make the movement path of the foreign matter into a labyrinth shape. Therefore, the invasion of foreign matter can be further reduced.

  Instead of the partition wall of the insulating member 53, a plurality of partition walls of the spring receiving portion 24 may be concentrically provided around the movable shaft 25, and either the partition wall of the spring receiving portion 24 or the partition wall of the insulating member 53 may be provided. A plurality of peaches may be concentrically provided around the movable shaft 25.

(Embodiment 5)
As shown in FIG. 11, the contact device 2 according to the fifth embodiment is different from the contact device 2 according to the second embodiment (see FIG. 5) in that the tip ends of the corresponding partition walls 244 and 534 face each other. To do. In addition, about the component similar to the electromagnetic relay 1 (refer FIG. 5) of Embodiment 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the contact device 2 of the present embodiment, the tip of the partition 244 (first partition) of the spring receiving portion 24 and the tip of the partition (second partition) of the insulating member 53 face each other in the axial direction of the movable shaft 25. is doing. That is, the partition 244 and the partition 534 are cylinders having the same radius. The description of the same functions as those of the spring receiving portion 24 and the insulating member 53 (see FIG. 5) of the second embodiment will be omitted.

  In the contact device 2 according to the present embodiment described above, the partition wall 244 (first partition wall) of the spring receiving portion 24 and the partition wall (second partition wall) of the insulating member 53 contact each other in the axial direction of the movable shaft 25. The size can be reduced.

(Embodiment 6)
As shown in FIG. 12, the contact device 2 according to the sixth embodiment is provided with the partition wall 244 so as to block the upper side and the lower side of the spring receiving portion 24, and thus the contact device 2 according to the first embodiment ( 1)). In addition, about the component similar to the electromagnetic relay 1 (refer FIG. 1) of Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the spring receiving portion 24 of the present embodiment, the partition wall 244 (first partition wall) includes an extending portion that extends in a direction intersecting the axial direction of the movable shaft 25. That is, the partition wall 244 has a base portion extending from the base portion 241 along the axial direction of the movable shaft 25, and a tip end portion extending in a direction intersecting the axial direction. The description of the same functions as those of the spring bearing portion 24 (see FIG. 1) of the first embodiment will be omitted.

  In the contact device 2 according to the present embodiment described above, the gap between the protruding portion 532 and the partition wall 244 located in the circumferential direction can be reduced, so that the movement path of foreign matter can be lengthened.

DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 2 Contact device 211 Fixed contact 22 Moving contact 24 Spring receiving part (1st partition member)
243 protruding part 244 partition wall (first partition wall)
25 movable shaft 3 drive device 53 insulating member (second partition member)
533 insertion hole 534 partition wall (first partition wall)
535 partition wall (second partition wall)

Claims (10)

Fixed contact,
A movable contact including a movable contact extending along a first axis and arranged to face the fixed contact;
The movable contact extends along a second axis orthogonal to the first axis, and moves the movable contactor along the second axis to bring the movable contact into contact with and separate from the fixed contact in accordance with the energization state of a drive device. A movable shaft arranged like
A contact pressure spring which is provided on the opposite side of the movable contact from the fixed contact and biases the movable contact toward the fixed contact;
A partition member provided around the end of the movable shaft, the partition member including a protrusion protruding in a cylindrical shape in the first direction along the movable shaft;
A first partition wall that is provided around the movable shaft and projects along the movable shaft in a second direction opposite to the first direction;
A second partition wall provided around the first partition wall and projecting in the second direction along the movable shaft;
Equipped with
The outer diameter of the protrusion and the inner diameter of the first partition wall are smaller than the outer diameter of the contact pressure spring,
Electromagnetic relay. The partition member is made of an insulating material,
The electromagnetic relay according to claim 1. The first partition wall is made of an insulating material,
The electromagnetic relay according to claim 1 or 2. The protrusion overlaps the first partition wall in a direction orthogonal to the second axis,
The electromagnetic relay according to any one of claims 1 to 3. The drive device is arranged so as to surround at least a part of the movable shaft, and
The first partition wall and the second partition wall are arranged above an upper surface of the drive unit on the movable contact side.
The electromagnetic relay according to claim 1. The drive device includes a coil bobbin having a cylindrical portion, an excitation winding wound around the cylindrical portion, and a yoke plate arranged on the movable contact side of the coil bobbin.
The electromagnetic relay according to claim 1 or claim 5. When viewed along the second axis, the protrusion, the first partition wall, and the second partition wall are provided coaxially with the movable shaft,
The electromagnetic relay according to claim 1 or claim 5. The first partition has a cylindrical shape,
The electromagnetic relay according to claim 1. The second partition has a cylindrical shape,
The electromagnetic relay according to claim 1 or claim 8. The inner diameter of the first partition wall is larger than the outer diameter of the protrusion,
The electromagnetic relay according to claim 1 or claim 8.

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