Electromagnetic relay

Abstract

To prevent a reduction in the insulating properties between stationary terminals due to abrasion powder accumulated inside an electromagnetic relay, while preventing an increase in the size of the electromagnetic relay.SOLUTION: An electromagnetic relay comprises a first stationary terminal, a second stationary terminal, a housing, a coil, and a spool. The second stationary terminal is arranged in front of the first stationary terminal to face the first stationary terminal. The housing includes a side face covering the first stationary terminal and the second stationary terminal from the lateral side. The coil is wound around the spool. The spool includes a support part and a lateral wall part. The support part supports the first stationary terminal. The lateral wall part extends from the support part and is arranged between the first stationary terminal and the side face of the housing in the left-right direction. A front end of the lateral wall part is located between the first stationary terminal and the second stationary terminal in the front-back direction.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to an electromagnetic relay. [Background technology]

[0002] Some electromagnetic relays have a pair of fixed terminals arranged opposite each other, and a side surface of a housing is arranged on either side of the pair of fixed terminals (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6344282 Summary of the Invention [Problem to be solved by the invention]

[0004] In electromagnetic relays, wear powder or consumable powder (hereinafter referred to as wear powder, etc.) is generated by moving parts such as contacts. When such wear powder accumulates along the side surface of the housing to the side of the fixed terminal, the insulation between the fixed terminals is reduced through the wear powder, etc. Increasing the distance between the fixed terminals and the side surface of the housing improves the insulation between the fixed terminals. However, in that case, the electromagnetic relay becomes larger. An object of the present invention is to suppress the deterioration of the insulation between the fixed terminals due to wear powder, etc., accumulated inside the electromagnetic relay, while suppressing the increase in size of the electromagnetic relay. [Means for solving the problem]

[0005] An electromagnetic relay according to one aspect of the present invention includes a first fixed terminal, a second fixed terminal, a housing, a coil, and a spool. The second fixed terminal is disposed in front of the first fixed terminal and facing the first fixed terminal. The housing includes a side surface that covers the first fixed terminal and the second fixed terminal from the sides. The coil is wound around the spool. The spool includes a support portion and a lateral wall portion. The support portion supports the first fixed terminal. The lateral wall portion extends from the support portion and is disposed between the first fixed terminal and the side surface of the housing in the left-right direction. The front end of the lateral wall portion is located between the first fixed terminal and the second fixed terminal in the front-rear direction.

[0006] In the electromagnetic relay according to this aspect, the creepage distance between the first fixed terminal and the second fixed terminal is increased by the thickness of the lateral wall portion, which prevents the electromagnetic relay from becoming large in size and also prevents deterioration of the insulation between the fixed terminals due to wear particles or the like that accumulate inside the electromagnetic relay.

[0007] The electromagnetic relay may further include a first fixed contact and a second fixed contact. The first fixed contact may be provided on the first fixed terminal. The second fixed contact may be provided on the second fixed terminal and disposed opposite the first fixed terminal. The front end of the lateral wall portion may be located between the first fixed contact and the second fixed contact in the front-rear direction. In this case, deterioration of insulation between the fixed contacts is suppressed.

[0008] The support portion may be located at the same height as the central axis of the coil. In this case, the first fixed terminal is supported by the support portion at a position above and away from wear powder and the like that accumulates inside the electromagnetic relay. Therefore, even if a large portion of the first fixed terminal is supported by the support portion, deterioration of insulation is suppressed.

[0009] The side wall portion may extend downward from the support portion. In this case, the side wall portion prevents a decrease in insulation below the support portion. The support portion may be longer than the side wall portion in the front-rear direction. In this case, the support portion stably supports the first fixed terminal.

[0010] A clearance may be provided between the side surface of the housing and the lateral wall portion. In this case, the creepage distance between the first fixed terminal and the second fixed terminal is further increased. This improves the insulation between the fixed terminals. The lateral wall portion may include an opening. In this case, wear powder and the like can be allowed to escape through the opening. This prevents the insulation between the fixed terminals from deteriorating.

[0011] The spool may include a bent portion that protrudes from the side wall portion toward between the first fixed terminal and the second fixed terminal. In this case, the bent portion prevents wear debris from scattering forward, thereby improving insulation between the fixed terminals.

[0012] The electromagnetic relay may further include a coil terminal. The coil terminal may include a main body portion and a entangling portion. The main body portion may be supported by a spool. The entangling portion may extend from the main body portion toward the first fixed terminal. The spool may include a vertical wall portion. The vertical wall portion may be located between the first fixed terminal and the entangling portion in the front-rear direction. The horizontal wall portion may extend forward from the vertical wall portion. In this case, the vertical wall portion and the horizontal wall portion increase the insulation distance between the first fixed terminal and the entangling portion. This improves the insulation between the first fixed terminal and the entangling portion. Effect of the Invention

[0013] According to the present invention, it is possible to suppress a decrease in insulation between fixed terminals caused by wear particles and the like that accumulate inside the electromagnetic relay while suppressing an increase in size of the electromagnetic relay. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view of an electromagnetic relay according to an embodiment. [Diagram 2] FIG. 1 is a perspective view of an electromagnetic relay according to an embodiment. [Diagram 3] FIG. [Figure 4] FIG. 2 is a perspective view of an electromagnetic relay from which a common terminal, a movable piece, and an armature are omitted. [Diagram 5]FIG. 2 is an exploded perspective view of the spool and the base. [Figure 6] FIG. 2 is a perspective view of a first fixed terminal. [Figure 7] 1 is a perspective view of an electromagnetic relay from below, in which a common terminal, a movable piece, and an armature are omitted. FIG. [Figure 8] FIG. 4 is a perspective view of a second fixed terminal. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. 11 is an enlarged view of FIG. [Figure 12] FIG. [Figure 13] FIG. 4 is a side view of an electromagnetic relay according to a first modified example. [Figure 14] FIG. 11 is a cross-sectional side view of an electromagnetic relay according to a second modified example. [Figure 15] FIG. 11 is a perspective view of a base of an electromagnetic relay according to a second modified example. [Figure 16] FIG. 13 is a sectional top view of an electromagnetic relay according to a third modified example. [Figure 17] FIG. 13 is a side view of an electromagnetic relay according to a fourth modified example. [Figure 18] FIG. 13 is a sectional top view of an electromagnetic relay according to a fifth modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an electromagnetic relay according to an embodiment will be described with reference to the drawings. Fig. 1 and Fig. 2 are perspective views of an electromagnetic relay 1 according to an embodiment. Fig. 3 is a side view of the electromagnetic relay 1. As shown in Figs. 1 to 3, the electromagnetic relay 1 includes a housing 2, a contact device 3, and a drive device 4. The contact device 3 and the drive device 4 are disposed in the housing 2.

[0016] The housing 2 includes a base 5 and a case 6. The base 5 supports the driving device 4. The case 6 is attached to the base 5 and covers the driving device 4 and the contact device 3. The base 5 and the case 6 are formed of an insulating material such as resin. Alternatively, the base 5 and the case 6 may be made of another insulating material such as ceramic. Note that the case 6 is omitted in Figs. 2 and 3.

[0017] The contact device 3 includes a first fixed terminal 11, a second fixed terminal 12, a first fixed contact 13, a second fixed contact 14, a common terminal 31, a movable piece 16, an armature 17, and a movable contact 18. The first fixed terminal 11, the second fixed terminal 12, the first fixed contact 13, the second fixed contact 14, the movable contact 18, the common terminal 31, and the movable piece 16 are made of a conductive metal. The armature 17 is made of a magnetic material.

[0018] In the following description, the direction in which the second fixed contact 14 is disposed relative to the first fixed contact 13 is defined as "forward", and the opposite direction is defined as "rearward". The direction in which the contact device 3 and the drive device 4 are disposed relative to the base 5 is defined as "upward", and the opposite direction is defined as "downward". In addition, the left and right directions facing forward are defined as "left" and "right", respectively. However, these directions are defined for the convenience of description, and do not limit the direction in which the electromagnetic relay 1 is used, etc.

[0019] The driving device 4 operates the contact device 3 by electromagnetic force. The driving device 4 includes a coil 21, a spool 22, a yoke 15, and an iron core 23. The coil 21 is wound around the spool 22. The spool 22 is supported by a base 5. As shown in FIG. 3, the spool 22 and the coil 21 are arranged such that a central axis A1 of the coil 21 faces in the front-rear direction. The spool 22 includes a hole 24. The hole 24 extends in the front-rear direction. The iron core 23 is arranged in the hole 24 of the spool 22. The iron core 23 is connected to the yoke 15.

[0020] The spool 22 is made of an insulating material such as resin. The spool 22 includes a first flange 25, a second flange 26, and a central flange 27. The first flange 25, the second flange 26, and the central flange 27 protrude in the radial direction of the coil 21. The first flange 25 is located at the front end of the spool 22. The second flange 26 is located at the rear end of the spool 22. The central flange 27 is disposed between the first flange 25 and the second flange 26 in the front-rear direction. The first flange 25 faces the first fixed terminal 11. The second flange 26 faces the common terminal 31. The central flange 27 is disposed between the first fixed terminal 11 and the common terminal 31.

[0021] A portion of the first fixed terminal 11 protrudes from the base 5 to the outside of the electromagnetic relay 1. The first fixed terminal 11 is supported by a spool 22. The first fixed terminal 11 is disposed in front of the coil 21. The first fixed terminal 11 is disposed in front of the first flange 25. The first fixed terminal 11 is attached to the first flange 25. A first fixed contact 13 is provided on the first fixed terminal 11.

[0022] A portion of the second fixed terminal 12 protrudes from the base 5 to the outside of the electromagnetic relay 1. The second fixed terminal 12 is supported by a spool 22. The second fixed terminal 12 is disposed in front of the coil 21. The second fixed terminal 12 is disposed in front of the first fixed terminal 11. The second fixed terminal 12 is attached to a central flange 27. The second fixed terminal 12 is provided with a second fixed contact 14.

[0023] A portion of the common terminal 31 protrudes from the base 5 to the outside of the electromagnetic relay 1. The common terminal 31 is integrated with the yoke 15. The common terminal 31 is supported by the spool 22 via the yoke 15. The common terminal 31 is disposed rearward of the coil 21. The common terminal 31 is disposed rearward of the second flange 26. The common terminal 31 is attached to the second flange 26 via the yoke 15.

[0024] The common terminal 31 extends in the up-down direction. A lower end of the common terminal 31 protrudes downward from the base 5. The yoke 15 extends upward from the common terminal 31 and has an L-shaped bent shape. The yoke 15 includes a horizontal portion 32. The horizontal portion 32 extends in the front-rear direction. The horizontal portion 32 is disposed above the spool 22. The horizontal portion 32 is disposed above the first flange 25, the second flange 26, and the central flange 27.

[0025] The movable piece 16 is connected to the common terminal 31 via the yoke 15. The movable piece 16 is provided with a movable contact 18. The movable piece 16 has spring properties. The movable piece 16 includes a leaf spring portion 33 and a movable support portion 34. The movable piece 16 has a bent shape between the leaf spring portion 33 and the movable support portion 34. The leaf spring portion 33 is disposed above the horizontal portion 32 of the yoke 15. The leaf spring portion 33 is fixed to the horizontal portion 32. The movable support portion 34 is disposed in front of the spool 22. The movable support portion 34 extends in the up-down direction. The lower portion of the movable support portion 34 is disposed between the first fixed terminal 11 and the second fixed terminal 12. The movable contact 18 is provided at the lower portion of the movable support portion 34. The movable contact 18 is disposed between the first fixed terminal 11 and the second fixed terminal 12 in the front-rear direction.

[0026] The armature 17 is attached to the movable piece 16. The armature 17 is disposed in front of the spool 22. The armature 17 is disposed between the movable support portion 34 of the movable piece 16 and the iron core 23. The armature 17 is attached to the movable support portion 34. An upper portion of the armature 17 is in contact with the horizontal portion 32 of the yoke 15.

[0027] FIG. 4 is a perspective view of the electromagnetic relay 1 with the case 6, yoke 15, movable piece 16, and armature 17 omitted. FIG. 5 is an exploded perspective view of the spool 22 and the base 5. As shown in FIGS. 4 and 5, the spool 22 includes a first support portion 41 and a second support portion 42. The first support portion 41 is provided on the first flange 25. The first support portion 41 and the second support portion 42 are formed integrally with the first flange 25. The first support portion 41 and the second support portion 42 support the first fixed terminal 11.

[0028] The first support portion 41 protrudes forward from the first flange 25. The first support portion 41 is disposed to the right of the hole 24 of the spool 22. The first support portion 41 supports the first fixed terminal 11. The first support portion 41 is located at the same height as the central axis A1 of the coil 21. The upper end of the first support portion 41 is located above the central axis A1 of the coil 21. The first support portion 41 includes a first groove 43. The first groove 43 extends in the up-down direction in the first support portion 41.

[0029] The second support portion 42 is disposed at a distance from the first support portion 41 in the left-right direction. The second support portion 42 is provided on the first flange 25. The second support portion 42 protrudes forward from the first flange 25. The second support portion 42 is disposed to the left of the hole 24 of the spool 22. The second support portion 42 supports the first fixed terminal 11. The second support portion 42 is located at the same height as the central axis A1 of the coil 21. The upper end of the second support portion 42 is located above the central axis A1 of the coil 21. The second support portion 42 includes a second groove 44. The second groove 44 extends in the up-down direction in the second support portion 42.

[0030] FIG. 6 is a perspective view of the first fixed terminal 11. As shown in FIG. 6, the first fixed terminal 11 includes a first locking portion 45, a second locking portion 46, a first contact support portion 47, and a first external terminal portion 48. The first locking portion 45 extends in the front-rear direction and the up-down direction. The first locking portion 45 is press-fitted into the first groove 43. This causes the first fixed terminal 11 to be attached to the first support portion 41. The second locking portion 46 extends in the front-rear direction and the up-down direction. The second locking portion 46 is press-fitted into the second groove 44. This causes the first fixed terminal 11 to be attached to the second support portion 42.

[0031] The first contact support portion 47 extends in the left-right direction. The first contact support portion 47 connects the first locking portion 45 and the second locking portion 46. The first contact support portion 47 is provided with the first fixed contact 13. The first external terminal portion 48 extends downward from the first contact support portion 47. The first external terminal portion 48 protrudes from the base 5 to the outside of the electromagnetic relay 1.

[0032] Fig. 7 is a perspective view of the electromagnetic relay 1 from below, with the housing 2, yoke 15, movable piece 16, and armature 17 omitted. As shown in Fig. 7, the spool 22 includes a third support portion 51. The third support portion 51 is provided on the central flange 27. The third support portion 51 supports the second fixed terminal 12. The third support portion 51 includes a third groove 52. The third groove 52 is provided on the bottom surface of the central flange 27.

[0033] FIG. 8 is a perspective view of the second fixed terminal 12. As shown in FIG. 8, the second fixed terminal 12 includes a third locking portion 53, a second contact support portion 54, a connecting portion 55, and a second external terminal portion 56. The third locking portion 53 extends in the up-down direction. The third locking portion 53 is press-fitted into the third groove 52. This causes the second fixed terminal 12 to be attached to the third support portion 51. The second contact support portion 54 extends in the left-right direction. The second fixed contact 14 is provided on the second contact support portion 54. The connecting portion 55 extends in the front-rear direction. The connecting portion 55 connects the third locking portion 53 and the second contact support portion 54. The second external terminal portion 56 extends downward from the second contact support portion 54. The second external terminal portion 56 protrudes from the base 5 to the outside of the electromagnetic relay 1.

[0034] FIG. 9 is a side view of the electromagnetic relay 1. Note that FIG. 9 shows a part of the spool 22 in cross section. FIG. 10 is a cross-sectional top view of the electromagnetic relay 1. As shown in FIGS. 9 and 10, the electromagnetic relay 1 includes a first coil terminal 61 and a second coil terminal 62. The first coil terminal 61 and the second coil terminal 62 are connected to the coil 21. The first coil terminal 61 and the second coil terminal 62 are attached to the central flange 27. The first coil terminal 61 and the second coil terminal 62 are disposed between the first fixed terminal 11 and the common terminal 31. Note that the case 6 is omitted in FIG. 9.

[0035] 9, the first coil terminal 61 includes a first body portion 63 and a first entangling portion 64. The first body portion 63 is supported by the central flange 27. The first body portion 63 extends downward from the central flange 27. The first body portion 63 protrudes from the base 5 to the outside of the electromagnetic relay 1.

[0036] The first entanglement portion 64 is formed integrally with the first body portion 63. The first entanglement portion 64 is bent with respect to the first body portion 63. The first entanglement portion 64 extends forward from the first body portion 63 along the axial direction of the coil 21. The first entanglement portion 64 extends from the first body portion 63 toward the first flange 25. The first entanglement portion 64 extends from the first body portion 63 toward the first fixed terminal 11. An end portion of the coil 21 is wound around the first entanglement portion 64.

[0037] The second coil terminal 62 has a similar shape to the first coil terminal 61. The second coil terminal 62 is disposed apart from the first coil terminal 61 in the left-right direction. The second coil terminal 62 includes a second main body portion 66 and a second entanglement portion 67. The second main body portion 66 and the second entanglement portion 67 have similar shapes to the first main body portion 63 and the first entanglement portion 64, respectively.

[0038] As shown in FIG. 10 , the central flange 27 includes a fourth groove 65 and a fifth groove 68. The fourth groove 65 and the fifth groove 68 are disposed to the left and right of the third groove. The first body portion 63 is press-fitted into the fourth groove 65. As a result, the first coil terminal 61 is attached to the central flange 27. The central flange 27 has a fifth groove 68. The second body portion 66 is press-fitted into the fifth groove 68. As a result, the second coil terminal 62 is attached to the central flange 27.

[0039] As shown in FIG. 5 , the first flange 25 includes a vertical wall portion 70, a first horizontal wall portion 71, and a second horizontal wall portion 72. The vertical wall portion 70 extends in the left-right direction. The vertical wall portion 70 extends upward from the base 5. The vertical wall portion 70 is disposed behind the first fixed terminal 11. The vertical wall portion 70 is disposed between the first fixed terminal 11 and the first interlocking portion 64. The vertical wall portion 70 is disposed between the first fixed terminal 11 and the second interlocking portion 67.

[0040] The first horizontal wall portion 71 is bent with respect to the vertical wall portion 70. The first horizontal wall portion 71 is disposed outward of the first contact support portion 47 of the first fixed terminal 11. The first horizontal wall portion 71 covers the first contact support portion 47 from the outer side. In a side view, the first horizontal wall portion 71 overlaps with the first contact support portion 47. The first horizontal wall portion 71 is disposed outward of the first fixed contact 13. The first horizontal wall portion 71 covers the first fixed contact 13 from the outer side. In a side view, the first horizontal wall portion 71 overlaps with the first fixed contact 13. In a side view, the first horizontal wall portion 71 is disposed at a position that does not overlap with the second contact support portion 54. In a side view, the first horizontal wall portion 71 is disposed at a position that does not overlap with the second fixed contact 14.

[0041] The first horizontal wall portion 71 extends forward from the vertical wall portion 70. In FIG. 9, the two-dot chain line indicates the position of the front end 710 of the first horizontal wall portion 71. As shown in FIG. 9 and FIG. 10, the first horizontal wall portion 71 extends forward from the vertical wall portion 70 to a position beyond the first fixed terminal 11. The front end 710 of the first horizontal wall portion 71 is located between the first fixed terminal 11 and the second fixed terminal 12. The front end 710 of the first horizontal wall portion 71 is located between the first fixed contact 13 and the second fixed contact 14. The position between the first fixed contact 13 and the second fixed contact 14 is a position from a position aligned with the contact surface of the first fixed contact 13 to a position aligned with the contact surface of the second fixed contact 14 in a side view. In this embodiment, the front end 710 of the first horizontal wall portion 71 is located at a position aligned with the contact surface of the first fixed contact 13 in a side view.

[0042] 3, the first lateral wall portion 71 extends downward from the first support portion 41. The first lateral wall portion 71 is shorter than the first support portion 41 in the front-rear direction. In other words, the first support portion 41 is longer than the first lateral wall portion 71 in the front-rear direction.

[0043] As shown in FIG. 10, the case 6 includes a first side surface 73 and a second side surface 74. The first side surface 73 and the second side surface 74 are arranged apart from each other in the left-right direction. The first side surface 73 covers the first fixed terminal 11 and the second fixed terminal 12 from the right side. The second side surface 74 covers the first fixed terminal 11 and the second fixed terminal 12 from the left side. The first lateral wall portion 71 is arranged between the first fixed terminal 11 and the first side surface 73. In detail, the first lateral wall portion 71 is arranged between the first contact support portion 47 of the first fixed terminal 11 and the first side surface 73.

[0044] Fig. 11 is an enlarged view of Fig. 10. As shown in Fig. 11, a clearance C1 is provided between the first side surface 73 and the first horizontal wall portion 71 of the case 6. As shown in Fig. 2, protrusions 75-77 are provided on the side surface of the base 5. As shown in Fig. 11, the protrusions 75-77 come into contact with the first side surface 73, thereby providing a clearance C1 between the first side surface 73 and the first horizontal wall portion 71.

[0045] The second lateral wall portion 72 has a shape similar to that of the first lateral wall portion 71. The second lateral wall portion 72 is disposed symmetrically to the first lateral wall portion 71. Although not shown in the drawings, a clearance is provided between the second lateral side surface 74 and the second lateral wall portion 72, similar to the first lateral side surface 73 and the first lateral wall portion 71.

[0046] The vertical wall portion 70 and the first horizontal wall portion 71 increase the insulation distance between the first coil terminal 61 and the first fixed terminal 11. In addition, the vertical wall portion 70 and the second horizontal wall portion 72 ensure the insulation distance between the second coil terminal 62 and the first fixed terminal 11.

[0047] In the electromagnetic relay 1 according to this embodiment, the electromagnetic relay 1 operates when electricity is applied to the coil 21 via the first coil terminal 61 and the second coil terminal 62. The operation of the electromagnetic relay 1 will be described below.

[0048] In the electromagnetic relay 1, when the coil 21 is not energized, the elastic force of the contact piece keeps the armature 17 away from the iron core 23 and urges the movable contact 18 toward the second fixed contact 14, as shown in Fig. 9. As a result, the movable contact 18 is away from the first fixed contact 13 and in contact with the second fixed contact 14.

[0049] When coil 21 is energized, armature 17 is attracted to iron core 23 by the magnetic force of the magnetic field generated by coil 21. This causes movable piece 16 to elastically deform, and movable support part 34 moves toward first fixed terminal 11. As a result, movable contact 18 moves away from second fixed contact 14 and comes into contact with first fixed contact 13, as shown in FIG.

[0050] When the current to the coil 21 is turned off, the elastic force of the movable piece 16 moves the movable support part 34 toward the second fixed contact 14. This causes the armature 17 to move away from the iron core 23. As a result, as shown in Fig. 9, the movable contact 18 moves away from the first fixed contact 13 and comes into contact with the second fixed contact 14.

[0051] As shown in FIG. 9, in the electromagnetic relay 1 according to the present embodiment described above, in the first coil terminal 61, the first entanglement portion 64 extends forward from the first body portion 63 along the coil 21. Therefore, the first coil terminal 61 is arranged compactly together with the coil 21. In addition, the vertical wall portion 70 of the first flange 25 is located between the first fixed terminal 11 and the first entanglement portion 64. Therefore, the insulation distance between the first fixed terminal 11 and the first entanglement portion 64 is increased. In addition, the first horizontal wall portion 71 extends forward from the vertical wall portion 70. Therefore, the insulation distance between the first fixed terminal 11 and the first entanglement portion 64 is further increased. This improves the insulation between the first fixed terminal 11 and the first coil terminal 61. Similarly, the second horizontal wall portion 72 increases the insulation distance between the first fixed terminal 11 and the second entanglement portion 67. This improves the insulation between the first fixed terminal 11 and the second coil terminal 62.

[0052] 11, in the electromagnetic relay 1, the creepage distance between the first fixed terminal 11 and the second fixed terminal 12 is increased by the thickness T1 of the first horizontal wall portion 71. This improves the insulation between the first fixed terminal 11 and the second fixed terminal 12 while preventing the electromagnetic relay 1 from becoming large. In addition, the creepage distance between the first fixed terminal 11 and the second fixed terminal 12 is increased by the clearance C1 between the first horizontal wall portion 71 and the first side surface 73. This improves the insulation between the first fixed terminal 11 and the second fixed terminal 12.

[0053] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention.

[0054] The shapes of the first fixed terminal 11, the second fixed terminal 12, and the common terminal 31 are not limited to those in the above embodiment, and may be modified. The shape of the movable piece 16 is not limited to those in the above embodiment, and may be modified. The shape of the spool 22 is not limited to those in the above embodiment, and may be modified. For example, the second fixed terminal 12 may be supported by the first flange 25. The second fixed contact 14 of the second fixed terminal 12 may be omitted. In that case, the second outer terminal portion 56 may be omitted, and the second fixed terminal 12 may be used as a dummy terminal. The common terminal 31 may be separated from the yoke 15, not integrated with it. The common terminal 31 may be integrated with the movable piece 16.

[0055] The shape of the first lateral wall portion 71 is not limited to that of the above embodiment and may be modified. For example, FIG. 13 is a side view of an electromagnetic relay 1 according to a first modified example. As shown in FIG. 13, the first lateral wall portion 71 may extend to a position aligned with the contact surface of the second fixed contact 14. Alternatively, the first lateral wall portion 71 may extend between a position aligned with the contact surface of the first fixed contact 13 and a position aligned with the contact surface of the second fixed contact 14. The shape of the second lateral wall portion 72 may also be modified in the same manner as the first lateral wall portion 71.

[0056] The shapes of the base 5 and the case 6 are not limited to those in the above embodiment and may be modified. For example, the above-mentioned first side surface 73 may be provided on the base 5 instead of the case 6. That is, the first lateral wall portion 71 may be disposed between the first fixed terminal 11 and the side surface of the base 5 in the left-right direction. The second side surface 74 may also be provided on the base 5, similar to the first side surface 73. The above-mentioned protrusions 75-77 may be provided on the case 6 or the spool 22 instead of the base 5.

[0057] FIG. 14 is a cross-sectional side view of the electromagnetic relay 1 according to the second modification. FIG. 15 is a perspective view of the base 5 of the electromagnetic relay 1 according to the second modification. As shown in FIG. 14 and FIG. 15, the base 5 may include a first base wall portion 78. The first base wall portion 78 may be disposed between the first fixed terminal 11 and the first interlocking portion 64. This further increases the insulation distance between the first coil terminal 61 and the first fixed terminal 11. The base 5 may include a second base wall portion 79. The second base wall portion 79 may be disposed between the first fixed terminal 11 and the second interlocking portion 67. This further increases the insulation distance between the second coil terminal 62 and the first fixed terminal 11.

[0058] Fig. 16 is a cross-sectional top view of an electromagnetic relay 1 according to a third modified example. As shown in Fig. 16, the case 6 may include a first case wall 81. The first case wall 81 may be disposed between the first fixed terminal 11 and the first connecting portion 64. This further increases the insulation distance between the first coil terminal 61 and the first fixed terminal 11. The case 6 may include a second case wall 82. The second case wall 82 may be disposed between the first fixed terminal 11 and the second connecting portion 67. This further increases the insulation distance between the second coil terminal 62 and the first fixed terminal 11.

[0059] Fig. 17 is a side view of an electromagnetic relay 1 according to a fourth modified example. As shown in Fig. 17, the first lateral wall portion 71 may include an opening 83. In this case, wear powder and the like can be allowed to escape through the opening 83. This prevents deterioration of the insulation between the first fixed terminal 11 and the second fixed terminal 12 due to wear powder and the like.

[0060] Fig. 18 is a side view of an electromagnetic relay 1 according to a fifth modified example. As shown in Fig. 18, the spool 22 may include a bent portion 84. The bent portion 84 may protrude from the first lateral wall portion 71 toward between the first fixed terminal 11 and the second fixed terminal 12. In this case, the bent portion 84 prevents wear powder and the like from scattering forward. This prevents a decrease in insulation between the first fixed terminal 11 and the second fixed terminal 12 due to wear powder and the like. [Industrial Applicability]

[0061] According to the present invention, it is possible to suppress a decrease in insulation between fixed terminals caused by wear particles and the like that accumulate inside the electromagnetic relay while suppressing an increase in size of the electromagnetic relay. [Explanation of symbols]

[0062] 2: housing, 11: first fixed terminal, 12: second fixed terminal, 13: first fixed contact, 14: second fixed contact, 21: coil, 22: spool, 25: first flange, 41: first support portion, 61: first coil terminal, 63: first main body portion, 64: first entanglement portion, 70: vertical wall portion, 71: first horizontal wall portion, 83: opening, 84: bent portion, C1: clearance

Claims

1. A first fixed terminal; a second fixed terminal disposed in front of the first fixed terminal and facing the first fixed terminal; a housing including a side surface covering the first fixed terminal and the second fixed terminal from a side; A coil and a spool around which the coil is wound, the spool including: a support portion that supports the first fixed terminal; and a lateral wall portion that extends from the support portion and is disposed between the first fixed terminal and a side surface of the housing in the left-right direction; Equipped with a front end of the lateral wall portion is located between the first fixed terminal and the second fixed terminal in the front-rear direction; Electromagnetic relay.

2. a first fixed contact provided on the first fixed terminal; a second fixed contact provided on the second fixed terminal and arranged to face the first fixed terminal; Further equipped with A front end of the lateral wall portion is located between the first fixed contact and the second fixed contact in the front-rear direction.

2. An electromagnetic relay as claimed in claim 1.

3. The lateral wall portion extends downward from the support portion.

2. An electromagnetic relay as claimed in claim 1.

4. The support portion is longer than the lateral wall portion in the front-rear direction.

2. An electromagnetic relay as claimed in claim 1.

5. A clearance is provided between the side surface of the housing and the lateral wall portion.

2. An electromagnetic relay as claimed in claim 1.

6. The lateral wall portion includes an opening.

2. An electromagnetic relay as claimed in claim 1.

7. The spool includes a bent portion protruding from the lateral wall portion toward a position between the first fixed terminal and the second fixed terminal.

2. An electromagnetic relay as claimed in claim 1.

8. a coil terminal including a main body supported by the spool and a tangling portion extending from the main body toward the first fixed terminal, the spool includes a vertical wall portion located between the first fixed terminal and the entangling portion in a front-rear direction, The lateral wall portion extends forward from the vertical wall portion.

2. An electromagnetic relay as claimed in claim 1.

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