Electromagnetic relay unit

Abstract

To provide an electromagnetic relay unit that can be mounted on a substrate stably regardless of the terminal arrangement.SOLUTION: An electromagnetic relay unit includes a base, a pedestal, a first contact terminal, and a second contact terminal. The pedestal is a separate body from the base, and is disposed below the base. The pedestal includes a first hole and a second hole. The first hole and the second hole extend in an up-down direction. The first contact terminal extends downward from the base through the first hole. The first contact terminal includes a first bent part that is bent along a bottom surface of the pedestal. The second contact terminal extends downward from the base through the second hole. The second contact terminal includes a second bent part that is bent along the bottom surface of the pedestal.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] There are so-called surface mount type electromagnetic relays. For example, as disclosed in Patent Document 1, in a surface mount type electromagnetic relay, a terminal protrudes downward from a base and has a bent portion that is bent toward the side. The bent portion is soldered to a board, whereby the electromagnetic relay is mounted on the board. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-201306 A Summary of the Invention [Problem to be solved by the invention]

[0004] One method for mounting an electromagnetic relay on a board is reflow soldering. In reflow soldering, solder is applied to the board in advance, and the electromagnetic relay is placed on top of it. The solder is then heated in a reflow furnace, soldering the electromagnetic relay to the board. Using this type of reflow soldering allows the electromagnetic relay to be mounted on the board efficiently.

[0005] However, in the above-mentioned surface-mount type electromagnetic relay, depending on the arrangement of the terminals, the balance when placed on the board may be poor, making it difficult to mount it on the board. For example, if the terminals are arranged asymmetrically on the bottom surface of the base, the electromagnetic relay may not be able to maintain its posture when placed on the board and may tilt. In that case, mounting by reflow soldering as described above is difficult. Alternatively, the electromagnetic relay may be arranged unstably, which may reduce the accuracy of mounting on the board. An object of the present invention is to provide an electromagnetic relay that can be stably mounted on a board regardless of the arrangement of the terminals. [Means for solving the problem]

[0006] An electromagnetic relay according to one aspect of the present invention includes a base, a pedestal, a first contact terminal, and a second contact terminal. The pedestal is separate from the base and is disposed below the base. The pedestal includes a first hole and a second hole. The first hole and the second hole each extend in the up-down direction. The first contact terminal extends downward from the base through the first hole. The first contact terminal includes a first bent portion bent along a bottom surface of the pedestal. The second contact terminal extends downward from the base through the second hole. The second contact terminal includes a second bent portion bent along the bottom surface of the pedestal.

[0007] In the electromagnetic relay according to this embodiment, the base prevents the electromagnetic relay from tilting when placed on the board. Therefore, the position of the electromagnetic relay before soldering can be stably maintained on the board. This allows the electromagnetic relay to be stably mounted on the board.

[0008] The base may include a first groove and a second groove. The first groove may be provided in a bottom surface of the base, and the first bent portion may be disposed therein. The second groove may be provided in a bottom surface of the base, and the second bent portion may be disposed therein. In this case, the bottom surface of the base is disposed closer to the board. This makes it possible to more stably maintain the position of the electromagnetic relay on the board.

[0009] The first bent portion and the second bent portion may be arranged asymmetrically on the bottom surface of the base. In this way, even if the terminal arrangement makes the electromagnetic relay unstable, the base can keep the electromagnetic relay in a stable position on the board.

[0010] The first bent portion and the second bent portion may be disposed on the bottom surface of the base on a first side of a center line of the bottom surface of the base. In this manner, even if the terminals are disposed in a way that makes the electromagnetic relay unstable, the base can keep the position of the electromagnetic relay stable on the board.

[0011] The base may include a third hole and a fourth hole. The third hole and the fourth hole may extend in the up-down direction. The electromagnetic relay may further include a first coil terminal and a second coil terminal. The first coil terminal may extend downward through the third hole. The first coil terminal may include a third bent portion bent along a bottom surface of the base. The second coil terminal may extend downward through the fourth hole. The second coil terminal may include a fourth bent portion bent along a bottom surface of the base.

[0012] The first bent portion, the second bent portion, the third bent portion, and the fourth bent portion may be disposed on the bottom surface of the base on a first side of a center line of the bottom surface of the base. In this manner, even if the terminals are disposed in a way that makes the electromagnetic relay unstable, the base can keep the position of the electromagnetic relay stable on the board.

[0013] The electromagnetic relay may further include an auxiliary terminal. The auxiliary terminal may be disposed on the bottom surface of the base on a second side opposite to the first side with respect to a center line of the bottom surface of the base. In this case, the auxiliary terminal allows the electromagnetic relay to be more stably maintained on the board. Furthermore, by soldering the auxiliary terminal to the board, the bonding strength of the electromagnetic relay to the board is improved.

[0014] The bottom surface of the base may include a first region, a second region, a third region, and a fourth region. The second region may be disposed symmetrically with the first region with respect to a first center line extending in the longitudinal direction of the bottom surface. The third region may be disposed symmetrically with the first region with respect to a second center line perpendicular to the first center line. The fourth region may be disposed symmetrically with the second region with respect to the second center line. The first bent portion may be disposed in the first region. The second bent portion may be disposed in the first region or the third region. The third bent portion may be disposed in the third region. The fourth bent portion may be disposed in the fourth region. In this way, even if the terminals are disposed in a way that makes the electromagnetic relay unstable, the base can stably maintain the position of the electromagnetic relay on the board.

[0015] The electromagnetic relay may further include at least one auxiliary terminal. The at least one auxiliary terminal may be disposed in an area of ​​the bottom surface of the base, among the first area to the fourth area, where the first bent portion to the fourth bent portion are not disposed. In this case, the auxiliary terminal can keep the position of the electromagnetic relay more stable on the board. Furthermore, by soldering the auxiliary terminal to the board, the bonding strength of the electromagnetic relay to the board is improved.

[0016] The electromagnetic relay may further include an auxiliary terminal provided on at least one of the first bent portion, the second bent portion, the third bent portion, and the fourth bent portion. In this case, the auxiliary terminal is soldered to the board, thereby improving the bonding strength of the electromagnetic relay to the board.

[0017] The base may include a third groove and a fourth groove. The third groove may be provided on a bottom surface of the base. A third bent portion may be disposed in the third groove. The fourth groove may be provided on a bottom surface of the base. A fourth bent portion may be disposed in the fourth groove. In this case, the bottom surface of the base is disposed closer to the board. This makes it possible to more stably maintain the position of the electromagnetic relay on the board.

[0018] The base may include a bottom plate and a side wall. The bottom plate may include a bottom surface of the base. The side wall may extend upward from the bottom plate. The side wall may be disposed to surround the base. In this case, the movement of the base is restricted by the side wall of the base. This improves the vibration resistance of the electromagnetic relay.

[0019] The side wall may include a recess that is recessed downward. In this case, the pedestal can be easily attached to and detached from the base. The side wall may include a first side wall, a second side wall, a third side wall, and a fourth side wall. The first side wall may be disposed on the left side of the base. The second side wall may be disposed on the right side of the base. The third side wall may be disposed in front of the base. The fourth side wall may be disposed in the rear of the base.

[0020] An electromagnetic relay according to another aspect of the present invention includes a base, a pedestal, a first coil terminal, and a second coil terminal. The pedestal is separate from the base and is disposed below the base. The pedestal includes a third hole and a fourth hole. The third hole and the fourth hole each extend in the up-down direction. The first coil terminal extends downward from the base through the third hole. The first coil terminal includes a third bent portion bent along a bottom surface of the pedestal. The second coil terminal extends downward from the base through the fourth hole. The second coil terminal includes a fourth bent portion bent along the bottom surface of the pedestal.

[0021] In the electromagnetic relay according to this embodiment, the base prevents the electromagnetic relay from tilting when placed on the board. Therefore, the position of the electromagnetic relay before soldering can be stably maintained on the board. This allows the electromagnetic relay to be stably mounted on the board. Effect of the Invention

[0022] According to the present invention, it is possible to provide an electromagnetic relay that can be stably mounted on a board regardless of the arrangement of the terminals. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a perspective view of an electromagnetic relay according to an embodiment. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 2 is a side view of the relay body without the case. [Figure 6] FIG. 2 is a side view of the relay body without the case. [Figure 7] FIG. [Figure 8] 8 is a cross-sectional view taken along line VIII-VIII in FIG. [Figure 9] IX-IX cross-sectional view of FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. 11 is a bottom view of the electromagnetic relay according to the first modified example. [Figure 13] FIG. 11 is a bottom view of an electromagnetic relay according to a second modified example. [Figure 14] FIG. 13 is a bottom view of an electromagnetic relay according to a third modified example. [Figure 15] FIG. 13 is a bottom view of an electromagnetic relay according to a fourth modified example. [Figure 16] FIG. 13 is a perspective view of an electromagnetic relay according to a fifth modified example. [Figure 17] FIG. 13 is a perspective view of an electromagnetic relay according to a sixth modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] An electromagnetic relay according to an embodiment will be described below with reference to the drawings. Figs. 1 and 2 are perspective views of an electromagnetic relay 1 according to an embodiment. Fig. 3 is a bottom view of the electromagnetic relay 1. Fig. 4 is an exploded perspective view of the electromagnetic relay 1. The electromagnetic relay 1 is a surface mount type relay. As shown in Figs. 1 to 4, the electromagnetic relay 1 includes a relay body 2 and a base 3.

[0025] As shown in Fig. 4, the relay body 2 includes a case 4. Figs. 5 and 6 are side views of the relay body 2 without the case 4. Fig. 7 is a bottom view of the relay body 2. As shown in Figs. 5 to 7, the relay body 2 includes a base 5, a fixed contact 6, a movable contact 7, a first contact terminal 8, and a second contact terminal 9.

[0026] In the following description, the direction in which the fixed contact 6 and the movable contact 7 are arranged relative to the base 5 is defined as the upper direction, and the opposite direction is defined as the lower direction. The direction in which the movable contact 7 is arranged relative to the fixed contact 6 is defined as the front direction, and the opposite direction is defined as the rear direction. In addition, the left and right sides as viewed from the front are defined as the left and right sides, respectively. However, these directions are used for convenience of description, and do not limit the arrangement, etc., of the electromagnetic relay 1.

[0027] The fixed contact 6 and the movable contact 7 are made of a metal having electrical conductivity. The fixed contact 6 and the movable contact 7 are disposed above the base 5. The movable contact 7 is disposed opposite the fixed contact 6. The fixed contact 6 is connected to a first contact terminal 8. The movable contact 7 is connected to a second contact terminal 9. The first contact terminal 8 and the second contact terminal 9 are made of a metal having electrical conductivity. The second contact terminal 9 is disposed opposite the first contact terminal 8. The first contact terminal 8 and the second contact terminal 9 are supported by the base 5. The base 5 is made of, for example, resin. The first contact terminal 8 and the second contact terminal 9 extend upward from the base 5. The first contact terminal 8 and the second contact terminal 9 protrude downward from the base 5 to the outside of the relay body 2.

[0028] Fig. 8 is a cross-sectional view taken along line VIII-VIII in Fig. 3. As shown in Fig. 8, the base 5 includes a first base hole 11 and a second base hole 12. The first contact terminal 8 is press-fitted into the first base hole 11. The first contact terminal 8 passes through the first base hole 11 and protrudes downward from the base 5. The second contact terminal 9 is press-fitted into the second base hole 12. The second contact terminal 9 passes through the second base hole 12 and protrudes downward from the base 5.

[0029] The first contact terminal 8 includes a first straight portion 15 and a first bent portion 16. The first straight portion 15 extends downward from the base 5 through the first base hole 11. The first bent portion 16 is bent relative to the first straight portion 15. The first bent portion 16 extends rearward from the first straight portion 15. The second contact terminal 9 includes a second straight portion 17 and a second bent portion 18. The second straight portion 17 extends downward from the base 5 through the second base hole 12. The second bent portion 18 is bent relative to the second straight portion 17. The second bent portion 18 extends forward from the second straight portion 17.

[0030] As shown in Fig. 5, the relay body 2 includes a coil block 20, a card 21, an armature 22, and a return spring 23. The coil block 20 generates an electromagnetic force that moves the movable contact 7 between an open position and a closed position. As shown in Fig. 5, when the movable contact 7 is in the open position, the movable contact 7 is separated from the fixed contact 6. As shown in Fig. 6, when the movable contact 7 is in the closed position, the movable contact 7 is in contact with the fixed contact 6. The coil block 20 includes a coil 24, a spool 25, an iron core 26, a yoke 27, a first coil terminal 28, and a second coil terminal 29.

[0031] The coil 24 is wound around the spool 25. Although not shown in the figure, ends of the coil 24 are connected to a first coil terminal 28 and a second coil terminal 29, respectively. The spool 25 is supported by a base 5. The spool 25 includes a cylindrical portion 31, an upper flange 32, and a lower flange 33. The coil 24 is wound around the cylindrical portion 31. The upper flange 32 and the lower flange 33 protrude radially from the cylindrical portion 31. The upper flange 32 is disposed above the cylindrical portion 31. The lower flange 33 is disposed below the cylindrical portion 31.

[0032] The iron core 26 is disposed within the spool 25. The yoke 27 has an L-shaped bent shape. The yoke 27 includes a first yoke portion 34 and a second yoke portion 35. The yoke 27 is bent between the first yoke portion 34 and the second yoke portion 35. The first yoke portion 34 is disposed below the iron core 26. The first yoke portion 34 is connected to the iron core 26. The second yoke portion 35 extends upward from the first yoke portion 34.

[0033] The first coil terminal 28 and the second coil terminal 29 are supported by the spool 25 and the base 5. The first coil terminal 28 and the second coil terminal 29 extend upward from the spool 25. The first coil terminal 28 and the second coil terminal 29 protrude downward from the base 5 to the outside of the relay body 2.

[0034] Fig. 9 is a cross-sectional view taken along line IX-IX in Fig. 3. As shown in Fig. 9, the spool 25 includes a first spool hole 36 and a second spool hole 37. The first spool hole 36 and the second spool hole 37 are provided in the lower flange 33. The base 5 includes a third base hole 13 and a fourth base hole 14.

[0035] The first coil terminal 28 is press-fitted into the first spool hole 36. Alternatively, the first coil terminal 28 may be press-fitted into the third base hole 13. The first coil terminal 28 passes through the first spool hole 36 and the third base hole 13 and protrudes downward from the base 5. The second coil terminal 29 is press-fitted into the second spool hole 37. Alternatively, the second coil terminal 29 may be press-fitted into the fourth base hole 14. The second coil terminal 29 passes through the second spool hole 37 and the fourth base hole 14 and protrudes downward from the base 5.

[0036] The first coil terminal 28 includes a third straight portion 41 and a third bent portion 42. The third straight portion 41 extends downward from the base 5 through the third base hole 13. The third bent portion 42 is bent with respect to the third straight portion 41. The third bent portion 42 extends leftward from the third straight portion 41. The second coil terminal 29 includes a fourth straight portion 43 and a fourth bent portion 44. The fourth straight portion 43 extends downward from the base 5 through the fourth base hole 14. The fourth bent portion 44 is bent with respect to the fourth straight portion 43. The fourth bent portion 44 extends rightward from the fourth straight portion 43.

[0037] 5, the card 21 includes a rotating shaft 51, a pressing portion 52, and a receiving portion 53. The rotating shaft 51 is rotatably supported by the base 5. The pressing portion 52 is disposed opposite the second contact terminal 9. The receiving portion 53 is disposed opposite the armature 22.

[0038] The armature 22 includes a first armature portion 54 and a second armature portion 55. The armature 22 has a bent shape between the first armature portion 54 and the second armature portion 55. The first armature portion 54 is disposed above the iron core 26. The first armature portion 54 is disposed facing the iron core 26. The second armature portion 55 extends downward from the first armature portion 54. The second armature portion 55 is disposed facing the receiving portion 53 of the card 21.

[0039] The armature 22 is supported by the second yoke portion 35. The armature 22 is supported rotatably around the upper end of the second yoke portion 35. The return spring 23 is connected to the armature 22. The return spring 23 is a hinge spring. The return spring 23 biases the armature 22 in a direction in which the second armature portion 55 moves away from the receiving portion 53 of the card 21.

[0040] Next, the operation of the relay body 2 will be described. In the following description, the direction in which the movable contact 7 approaches the fixed contact 6 is defined as the closing direction, and the direction in which the movable contact 7 moves away from the fixed contact 6 is defined as the opening direction. When no current flows through the coil 24, the movable contact 7 is away from the fixed contact 6, as shown in FIG. 5.

[0041] When a current flows through the coil 24, the first armature portion 54 is attracted to the iron core 26 by the electromagnetic force generated by the coil 24. This causes the armature 22 to rotate against the biasing force of the return spring 23. When the armature 22 rotates, the second armature portion 55 presses the receiving portion 53 of the card 21 in the closing direction. This causes the card 21 to rotate in the closing direction, and the pressing portion 52 of the card 21 presses the second contact terminal 9 in the closing direction. The second contact terminal 9 is elastically deformed by being pressed by the pressing portion 52, and as a result, the movable contact 7 moves in the closing direction and comes into contact with the fixed contact 6, as shown in FIG. 6.

[0042] When the current to the coil 24 is cut off, the electromagnetic force by which the iron core 26 attracts the first armature portion 54 disappears. Therefore, the armature 22 rotates in the opposite direction to the above due to the biasing force of the return spring 23. This causes the card 21 to rotate in the opening direction, and the second contact terminal 9 moves in the opening direction due to the elastic force of the second contact terminal 9. This causes the movable contact 7 to move in the opening direction and separate from the fixed contact 6.

[0043] Next, the pedestal 3 will be described. As shown in FIG. 4, the pedestal 3 is separate from the base 5. The pedestal 3 is made of, for example, resin. The pedestal 3 is disposed below the base 5. FIG. 10 is a top view of the pedestal 3. FIG. 11 is a bottom view of the pedestal 3. As shown in FIGS. 4 and 10, the pedestal 3 has a box-like shape with an opening 60 that opens upward. The relay body 2 is disposed within the opening 60 of the pedestal 3.

[0044] The base 3 includes a bottom plate 61 and a side wall 62. The bottom plate 61 is disposed below the base 5. The bottom plate 61 includes a bottom surface 63 of the base 3. The bottom plate 61 supports the base 5. The side wall 62 extends upward from the bottom plate 61. The side wall 62 is disposed surrounding the base 5. An upper end of the side wall 62 is located below an upper surface of the case 4. The side wall 62 is disposed surrounding a portion of the case 4. As shown in FIGS. 8 and 9, an upper end of the side wall 62 is located above an upper surface of the lower flange 33 of the spool 25.

[0045] In detail, the side wall 62 includes a first side wall 64, a second side wall 65, a third side wall 66, and a fourth side wall 67. The first side wall 64 is disposed on the left side of the base 5. The second side wall 65 is disposed on the right side of the base 5. The third side wall 66 is disposed in front of the base 5. The fourth side wall 67 is disposed in the rear of the base 5. The first side wall 64 includes a first recess 68. The first recess 68 is recessed downward from the upper end of the first side wall 64. The second side wall 65 includes a second recess 69. The second recess 69 is recessed downward from the upper end of the second side wall 65.

[0046] As shown in Fig. 10, a plurality of protrusions 71-78 are provided on the inner surface of the side wall 62. The relay body 2 is fixed to the base 3 by press-fitting. The plurality of protrusions 71-78 come into contact with the case 4 of the relay body 2. As shown in Figs. 10 and 11, the base 3 includes a first base hole 81, a second base hole 82, a third base hole 83, and a fourth base hole 84. The first to fourth base holes 81-84 extend in the up-down direction in the bottom plate 61 of the base 3.

[0047] As shown in FIG. 11, the base 3 includes a first groove 85, a second groove 86, a third groove 87, and a fourth groove 88. The first groove 85, the second groove 86, the third groove 87, and the fourth groove 88 are provided on the bottom surface 63 of the base 3. The first groove 85, the second groove 86, the third groove 87, and the fourth groove 88 are recessed upward from the bottom surface 63 of the base 3. The first groove 85 extends rearward from the first base hole 81. The second groove 86 extends forward from the second base hole 82. The third groove 87 extends leftward from the third base hole 83. The fourth groove 88 extends rightward from the fourth base hole 84.

[0048] The first seating hole 81 and the first groove 85 are arranged to correspond to the first contact terminal 8. The second seating hole 82 and the second groove 86 are arranged to correspond to the second contact terminal 9. The third seating hole 83 and the third groove 87 are arranged to correspond to the first coil terminal 28. The fourth seating hole 84 and the fourth groove 88 are arranged to correspond to the second coil terminal 29.

[0049] As shown in FIG. 8, the first straight portion 15 of the second contact terminal 9 extends downward from the base 5 through the first seat hole 81. The first bent portion 16 of the first contact terminal 8 is bent along the bottom surface 63 of the seat 3. The first bent portion 16 is disposed in the first groove 85. At least a portion of the first bent portion 16 protrudes slightly downward from the first groove 85 beyond the bottom surface 63. The second straight portion 17 of the second contact terminal 9 extends downward from the base 5 through the second seat hole 82. The second bent portion 18 of the second contact terminal 9 is bent along the bottom surface 63 of the seat 3. The second bent portion 18 is disposed in the second groove 86. At least a portion of the second bent portion 18 protrudes slightly downward from the second groove 86 beyond the bottom surface 63.

[0050] As shown in FIG. 9 . The third straight portion 41 of the first coil terminal 28 extends downward from the base 5 through the third seat hole 83. The third bent portion 42 of the first coil terminal 28 is bent along the bottom surface 63 of the seat 3. The third bent portion 42 is disposed in the third groove 87. At least a portion of the third bent portion 42 protrudes slightly downward from the third groove 87 beyond the bottom surface 63. The fourth straight portion 43 of the second coil terminal 29 extends downward from the base 5 through the fourth seat hole 84. The fourth bent portion 44 of the second coil terminal 29 is bent along the bottom surface 63 of the seat 3. The fourth bent portion 44 is disposed in the fourth groove 88. At least a portion of the fourth bent portion 44 protrudes slightly downward from the fourth groove 88 beyond the bottom surface 63. The first bent portion 16, the second bent portion 18, the third bent portion 42, and the fourth bent portion 44 are disposed flush with one another.

[0051] As shown in FIG. 3, the first bent portion 16 of the first contact terminal 8 and the second bent portion 18 of the second contact terminal 9 are arranged asymmetrically on the bottom surface 63 of the base 3. In detail, the first bent portion 16 and the second bent portion 18 are arranged asymmetrically with respect to the center line of the bottom surface 63. The center line of the bottom surface 63 includes a first center line C1 and a second center line C2. The first center line C1 extends in the longitudinal direction of the bottom surface 63. In this embodiment, the longitudinal direction of the bottom surface 63 is the front-rear direction. The second center line C2 is perpendicular to the first center line C1. That is, the second center line C2 extends in the left-right direction.

[0052] The first bent portion 16 and the second bent portion 18 are disposed on the bottom surface 63 of the base 3 to the left of the first center line C1. The base 3 includes an auxiliary terminal 89. The auxiliary terminal 89 may be a dummy terminal through which no current flows. The auxiliary terminal 89 is attached to the bottom surface 63 of the base 3. The auxiliary terminal 89 is made of metal. The auxiliary terminal 89 is disposed flush with the first bent portion 16, the second bent portion 18, the third bent portion 42, and the fourth bent portion 44. The auxiliary terminal 89 is disposed on the opposite side of the first center line C1 to the first bent portion 16 and the second bent portion 18. That is, the auxiliary terminal 89 is disposed on the right side of the first center line C1.

[0053] The bottom surface 63 of the base 3 includes a first region A1, a second region A2, a third region A3, and a fourth region A4. The second region A2 is disposed symmetrically with the first region A1 with respect to the first center line C1. The third region A3 is disposed symmetrically with the first region A1 with respect to the second center line C2. The fourth region A4 is disposed symmetrically with the second region A2 with respect to the second center line C2. The fourth region A4 is disposed symmetrically with the third region A3 with respect to the first center line C1.

[0054] The first seating hole 81 and the first groove 85 are disposed in the first region A1. The second seating hole 82 and the second groove 86 are disposed in the first region A1. The third seating hole 83 and the third groove 87 are disposed in the third region A3. The fourth seating hole 84 and the fourth groove 88 are disposed in the fourth region A4.

[0055] The first bent portion 16 of the first contact terminal 8 and the second bent portion 18 of the second contact terminal 9 are arranged in the first region A1. The third bent portion 42 of the first coil terminal 28 is arranged in the third region A3. The fourth bent portion 44 of the second coil terminal 29 is arranged in the fourth region A4. The auxiliary terminal 89 is arranged in a region of the first to fourth regions A1-A4 where the first to fourth bent portions 16, 18, 42, 44 are not arranged. In other words, the auxiliary terminal 89 is arranged in the second region A2.

[0056] In the electromagnetic relay 1 according to the present embodiment described above, the base 3 prevents the electromagnetic relay 1 from tilting when placed on the board. Therefore, the posture of the electromagnetic relay 1 before soldering can be stably maintained on the board. This allows the electromagnetic relay 1 to be stably mounted on the board.

[0057] 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.

[0058] The structure of the base 5 is not limited to that of the above embodiment and may be modified. The structures of the fixed contact 6, the movable contact 7, the first contact terminal 8, and the second contact terminal 9 are not limited to that of the above embodiment and may be modified. For example, the fixed contact 6 may be separate from the first contact terminal 8, or may be separate from the first contact terminal 8. The movable contact 7 may be separate from the second contact terminal 9, or may be separate from the second contact terminal 9. The fixed contact 6 may be connected to the second contact terminal 9. The movable contact 7 may be connected to the first contact terminal 8.

[0059] The bending directions of the first to fourth bent portions 16, 18, 42, and 44 are not limited to those in the above embodiment, and may be changed. For example, FIG. 12 is a bottom view of the electromagnetic relay 1 according to the first modified example. As shown in FIG. 12, the first to fourth bent portions 16, 18, 42, and 44 may be bent toward the inside of the bottom surface 63 of the base 3 so as not to protrude outward from the bottom surface 63 of the base 3. The first bent portion 16 and the second bent portion 18 may be bent toward the same direction. The third bent portion 42 and the fourth bent portion 44 may be bent toward the same direction. FIG. 13 is a bottom view of the electromagnetic relay 1 according to the second modified example. As shown in FIG. 13, the first bent portion 16 and the second bent portion 18 may be bent in the left-right direction, not limited to the front-rear direction. As shown in FIG. 12, the third bent portion 42 and the fourth bent portion 44 may be bent in the front-rear direction, not limited to the left-right direction. The first bent portion 16 and the second bent portion 18 may be bent in directions facing each other. The third bent portion 42 and the fourth bent portion 44 may be bent in directions facing each other.

[0060] The arrangement of the first to fourth bent portions 16, 18, 42, 44 is not limited to that in the above embodiment and may be changed. For example, Fig. 14 is a bottom view of an electromagnetic relay 1 according to a third modified example. As shown in Fig. 14, the first to fourth bent portions 16, 18, 42, 44 may all be arranged on the same side with respect to the first center line C1.

[0061] The auxiliary terminal is not limited to one, and a plurality of auxiliary terminals may be provided. For example, as shown in FIG. 14, a plurality of auxiliary terminals 89A, 89B may be arranged on the opposite side of the first center line C1 to the first to fourth bent portions 16, 18, 42, 44. The auxiliary terminals 89A, 89B shown in FIG. 14 may be dummy terminals through which no current flows. Alternatively, an auxiliary terminal may be provided for at least one of the first to fourth bent portions 16, 18, 42, 44. For example, FIG. 15 is a bottom view of an electromagnetic relay 1 according to a fourth modified example. As shown in FIG. 15, auxiliary terminals 89A-89D may be provided for each of the first to fourth bent portions 16, 18, 42, 44. Note that in the electromagnetic relay 1 according to the fourth modified example shown in FIG. 15, the auxiliary terminals 89A-89D may be energized in the same manner as the first contact terminal 8, the second contact terminal 9, the first coil terminal 28, and the second coil terminal 29. Alternatively, the auxiliary terminal may be omitted.

[0062] The structures of the coil block 20, the card 21, the armature 22, and the return spring 23 are not limited to those in the above embodiment and may be modified. For example, the card 21 may be movable linearly.

[0063] The structure of the base 3 is not limited to the above embodiment and may be modified. The side wall 62 of the base 3 may be in contact with at least a part of each of the four side walls of the case 4, i.e., the front, rear, left and right. For example, FIG. 16 is a perspective view of the electromagnetic relay 1 according to the fifth modified example. As shown in FIG. 16, the first recess 68 and the second recess 69 of the side wall 62 may be omitted. Alternatively, FIG. 17 is a perspective view of the electromagnetic relay 1 according to the sixth modified example. As shown in FIG. 17, the third side wall 66 and the fourth side wall 67 may be provided with the third recess 91 and the fourth recess 92, respectively. Alternatively, the side wall 62 may be omitted. The groove may be omitted in the bottom surface 63 of the bottom surface 63 of the base 3. The fixing method of the relay body 2 and the base 3 is not limited to press-fitting and may be modified. For example, the relay body 2 and the base 3 may be fixed to each other by snap-fitting. [Industrial Applicability]

[0064] According to the present invention, it is possible to provide an electromagnetic relay that can be stably mounted on a board regardless of the arrangement of the terminals. [Explanation of symbols]

[0065] 3: pedestal, 5: base, 6: fixed contact, 7: movable contact, 8: first contact terminal, 9: second contact terminal, 16: first bent portion, 18: second bent portion, 28: first coil terminal, 29: second coil terminal, 42: third bent portion, 44: fourth bent portion, 61: bottom plate, 62: side wall, 81: first seating hole, 82: second seating hole, 83: third seating hole, 84: fourth seating hole, 85: first groove, 86: second groove, 87: third groove, 88: fourth groove, 89: auxiliary terminal, A1: first region, A2: second region, A3: third region, A4: fourth region, C1: first center line, C2: second center line

Claims

1. With the base, a pedestal that is separate from the base, that is disposed below the base, and that includes a first hole extending in the vertical direction and a second hole extending in the vertical direction; a first contact terminal including a first bent portion extending downward from the base through the first hole and bent along a bottom surface of the seat; a second contact terminal including a second bent portion extending downward from the base through the second hole and bent along a bottom surface of the seat; An electromagnetic relay comprising:

2. The base is a first groove provided on a bottom surface of the base, in which the first bent portion is disposed; a second groove provided on a bottom surface of the base, in which the second bent portion is disposed; Including, 2. An electromagnetic relay as claimed in claim 1.

3. The first bent portion and the second bent portion are asymmetrically disposed on the bottom surface of the base.

2. An electromagnetic relay as claimed in claim 1.

4. The first bent portion and the second bent portion are disposed on a bottom surface of the base on a first side of a center line of the bottom surface of the base.

4. An electromagnetic relay according to claim 3.

5. The base is A third hole extending in the vertical direction; A fourth hole extending in the vertical direction; Including, a first coil terminal including a third bent portion extending downward through the third hole and bent along a bottom surface of the base; a second coil terminal including a fourth bent portion extending downward through the fourth hole and bent along a bottom surface of the base; Further comprising:

2. An electromagnetic relay as claimed in claim 1.

6. the first bent portion, the second bent portion, the third bent portion, and the fourth bent portion are disposed on a bottom surface of the base on a first side of a center line of the bottom surface of the base; 6. An electromagnetic relay according to claim 5.

7. and an auxiliary terminal disposed on a bottom surface of the base on a second side opposite to the first side with respect to a center line of the bottom surface of the base.

7. An electromagnetic relay according to claim 4 or 6.

8. The bottom surface of the base is A first region; and a second region disposed symmetrically with respect to the first region with respect to a first center line extending in a longitudinal direction of the bottom surface; a third region disposed symmetrically with respect to the first region with respect to a second center line perpendicular to the first center line; a fourth region disposed symmetrically with respect to the second center line with respect to the second region; Including, The first bent portion is disposed in the first region, the second bent portion is disposed in the first region or the third region, the third bent portion is disposed in the third region, The fourth bent portion is disposed in the fourth region.

6. An electromagnetic relay according to claim 5.

9. and at least one auxiliary terminal disposed in a region of the bottom surface of the base, the region being in a region not including the first bent portion to the fourth bent portion, among the first region to the fourth region.

9. An electromagnetic relay according to claim 8.

10. further comprising an auxiliary terminal provided on at least one of the first bent portion, the second bent portion, the third bent portion, and the fourth bent portion; 6. An electromagnetic relay according to claim 5.

11. The base is a third groove provided on a bottom surface of the base, in which the third bent portion is disposed; a fourth groove provided on a bottom surface of the base, in which the fourth bent portion is disposed; Including, 6. An electromagnetic relay according to claim 5.

12. The base is A bottom plate including the bottom surface; A side wall extending upward from the bottom plate and surrounding the base; Including, 2. An electromagnetic relay as claimed in claim 1.

13. The side wall includes a recess that is recessed downward.

13. An electromagnetic relay as claimed in claim 12.

14. The side wall is a first side wall disposed on a left side of the base; a second side wall disposed on a right side of the base; a third side wall disposed in front of the base; a fourth side wall disposed rearward of the base; Including, 13. An electromagnetic relay as claimed in claim 12.

15. With the base, a pedestal that is separate from the base, that is disposed below the base, and that includes a third hole extending in the vertical direction and a fourth hole extending in the vertical direction; a first coil terminal including a third bent portion extending downward from the base through the third hole and bent along a bottom surface of the pedestal; a second coil terminal including a fourth bent portion extending downward from the base through the fourth hole and bent along a bottom surface of the pedestal; An electromagnetic relay comprising:

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