Electromagnetic relay

Abstract

This invention provides an electromagnetic relay with high heat resistance and the ability to stably mount terminals to a base. The base is made of a thermosetting resin. A first terminal extends through a first hole. A fixing member is independent of the base. The fixing member has a higher elasticity than the thermosetting resin. The fixing member fixes the first terminal to the base. The fixing member includes a first support wall and a first recess. The first support wall is disposed between the inner surface of the first hole and the first terminal. The first support wall extends upward along the first terminal. The first recess is disposed on the upper surface of the first support wall and faces the first terminal. A first adhesive fills the first recess. The first adhesive bonds the first terminal to the first support wall.

Description

Technical Field

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

[0002] The electromagnetic relay includes a base and a terminal. The base is made of resin and has a hole for inserting the terminal. As shown in Patent Document 1, the terminal is fixed to the base by press-fitting.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2016-110844

[0004] In high-capacity electromagnetic relays, the base is preferably made of a thermosetting resin from the viewpoint of heat resistance. However, if the terminal is fixed to the base made of a thermosetting resin by pressing, it is easy for the base to crack or generate resin chips. Therefore, it is difficult to fix the terminal to the base made of a thermosetting resin by pressing. However, if the terminal is not fixed to the base by pressing, the position of the terminal cannot be stably determined, and the position of the terminal after assembly will deviate. Summary of the invention

[0005] An object of the present invention is to provide an electromagnetic relay having high heat resistance and capable of stably mounting a terminal on a base.

[0006] An electromagnetic relay of one embodiment of the present invention comprises a base, a first terminal, a fixing component and a first adhesive. The base comprises a first hole. The base is made of a thermosetting resin. The first terminal extends through the first hole. The fixing component is independent of the base. The fixing component has an elasticity higher than that of the thermosetting resin. The fixing component fixes the first terminal to the base. The fixing component comprises a first support wall and a first recess. The first support wall is arranged between the inner surface of the first hole and the first terminal. The first support wall extends upward along the first terminal. The first recess is arranged on the upper surface of the first support wall and faces the first terminal. The first adhesive is filled in the first recess. The first adhesive bonds the first terminal to the first support wall.

[0007] In the electromagnetic relay of this mode, the base is made of a thermosetting resin. Therefore, it has high heat resistance. In addition, the first terminal is fixed to the base by a fixing component. The fixing component has elasticity higher than that of the thermosetting resin. Therefore, it is possible to suppress the breakage of the base or the generation of resin chips. In addition, the first terminal is bonded to the first support wall by a first adhesive. Therefore, the first terminal is firmly fixed to the fixing component. In addition, when the electromagnetic relay is actuated, the bouncing of the first terminal can be suppressed.

[0008] The base may also include a second hole. The electromagnetic relay may also include a second terminal and a second adhesive. The second terminal may also extend through the second hole. The fixing component may also include a second support wall and a second recess. The second support wall may also be arranged between the inner surface of the second hole and the second terminal. The second support wall may also extend upward along the second terminal. The second recess may also be arranged on the upper surface of the second support wall and face the second terminal. The second adhesive may also be filled in the second recess. The second adhesive may also bond the second terminal to the second support wall.

[0009] In this case, the second terminal is fixed to the base by a fixing member. Therefore, the base can be prevented from being broken or the resin chips can be prevented from being generated. In addition, the second terminal is bonded to the second support wall by a second adhesive. Therefore, the second terminal is firmly fixed to the second support wall. Furthermore, when the electromagnetic relay is actuated, the second terminal can be prevented from bouncing.

[0010] The fixing member may also include a connecting portion. The connecting portion may also connect the first support wall and the second support wall. The first support wall, the connecting portion and the second support wall may also be formed integrally with each other. In this case, the number of components is reduced.

[0011] The second adhesive may be harder than the fixing member. In this case, the second terminal is further prevented from bouncing. The first adhesive may be harder than the fixing member. In this case, the first terminal is further prevented from bouncing.

[0012] The base may also include an opening adjacent to the first hole. The fixing member may also be arranged in the opening by pressing. The fixing member may also include a plurality of protrusions. The plurality of protrusions may also be arranged in the opening and contact the base. In this case, the base can be prevented from being broken, and the first terminal can be stably fixed to the base by pressing the fixing member.

[0013] The protrusion may also extend in the up-down direction and include a curved front end. In this case, the protrusion contacts the base through line contact. Therefore, compared with the case where the protrusion contacts the base through surface contact, the protrusion is easily elastically deformed. Thus, the occurrence of cracks in the base can be further suppressed.

[0014] The base may include a cutout. The cutout may be arranged at the edge of the first hole. In this case, the first terminal can be temporarily fixed to the base by filling the cutout with adhesive. Thus, the assembly performance of the electromagnetic relay is improved.

[0015] In the electromagnetic relay disclosed in the present invention, the base is made of a thermosetting resin. Therefore, it has high heat resistance. In addition, the first terminal is fixed to the base by a fixing component. The fixing component has elasticity higher than that of the thermosetting resin. Therefore, it is possible to suppress the breakage of the base or the generation of resin chips. In addition, the first terminal is bonded to the first support wall by a first adhesive. Therefore, the first terminal is firmly fixed to the fixing component. In addition, when the electromagnetic relay is actuated, the bouncing of the first terminal can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : is a perspective view of the electromagnetic relay according to the embodiment.

[0017] Figure 2 This is an exploded perspective view of an electromagnetic relay.

[0018] Figure 3 This is an exploded perspective view of an electromagnetic relay.

[0019] Figure 4 It is a longitudinal cross-sectional view of an electromagnetic relay.

[0020] Figure 5 is a top view of the electromagnetic relay with the moving part in the off position.

[0021] Figure 6 is a top view of an electromagnetic relay with the moving part in the closed position.

[0022] Figure 7 It is a three-dimensional diagram of the moving parts and their surroundings.

[0023] Figure 8 It is a three-dimensional diagram of the base and the first and second fixed terminals.

[0024] Fig. 9 It is a bottom view of the base and the first and second fixed terminals.

[0025] Fig.10 is an exploded view of the base and mounting components.

[0026] Fig.11 is an exploded view of the base and mounting components.

[0027] Fig.12 yes Fig. 9 Section view XII-XII.

[0028] Fig.13 is an enlarged view of the first protrusion.

[0029] Description of reference numerals:

[0030] 11…base; 13…first fixed terminal; 14…second fixed terminal; 80…fixing member; 81…first support wall; 82…second support wall; 83…connecting portion; 84…first recess; 85…first adhesive; 86…second recess; 87…second adhesive; 88a…first protrusion; 91…first hole; 92…second hole; 93…opening; 94…first incision. DETAILED DESCRIPTION

[0031] Hereinafter, an electromagnetic relay 1 according to an embodiment will be described with reference to the drawings. Figure 1 It is a perspective view of the electromagnetic relay 1 according to the embodiment. Figure 2 and Figure 3 It is an exploded perspective view of the electromagnetic relay 1 . Figure 4 It is a longitudinal sectional view of the electromagnetic relay 1 . Figure 5 and Figure 6 It is a top view of the electromagnetic relay 1 .

[0032] The electromagnetic relay 1 includes a contact block 2, a housing 3, a coil block 4, a first fixed terminal 13, and a second fixed terminal 14. The contact block 2 and the coil block 4 are arranged in the housing 3. The housing 3 includes a base 11 and a housing 12. The base 11 and the housing 12 are made of resin, for example. Figure 1 The housing 12 is omitted. The base 11 supports the first fixed terminal 13, the second fixed terminal 14, the contact block 2 and the coil block 4.

[0033] In the present embodiment, the moving directions (Y1, Y2), the supporting directions (Z1, Z2) and the lateral directions (X1, X2) are defined as follows. The moving directions (Y1, Y2) are the directions in which the contact block 2 and the coil block 4 are arranged relative to each other. The moving directions (Y1, Y2) include a first moving direction (Y1) and a second moving direction (Y2). The first moving direction (Y1) is the direction from the contact block 2 toward the coil block 4. The second moving direction (Y2) is the direction opposite to the first moving direction (Y1). The second moving direction (Y2) is the direction from the coil block 4 toward the contact block 2.

[0034] The supporting directions (Z1, Z2) are directions perpendicular to the moving directions (Y1, Y2). The supporting directions (Z1, Z2) are directions in which the base 11 and the contact block 2 are arranged relative to each other. The supporting directions (Z1, Z2) include a first supporting direction (Z1) and a second supporting direction (Z2). The first supporting direction (Z1) is a direction from the contact block 2 toward the base 11. The second supporting direction (Z2) is a direction opposite to the first supporting direction (Z1). The second supporting direction (Z2) is a direction from the base 11 toward the contact block 2. Alternatively, the supporting directions (Z1, Z2) may also be directions in which the base 11 and the coil block 4 are arranged relative to each other.

[0035] The lateral direction (X1, X2) is a direction perpendicular to the moving direction (Y1, Y2) and the supporting direction (Z1, Z2). The lateral direction (X1, X2) includes a first lateral direction (X1) and a second lateral direction (X2). The second lateral direction (X2) is a direction opposite to the first lateral direction (X1).

[0036] The first fixed terminal 13 and the second fixed terminal 14 are formed of a conductive material such as copper. The first fixed terminal 13 and the second fixed terminal 14 extend in the supporting directions (Z1, Z2), respectively. The first fixed terminal 13 and the second fixed terminal 14 are arranged to be separated from each other in the lateral direction (X1, X2). The first fixed terminal 13 is fixed to the base 11. The front end of the first fixed terminal 13 protrudes outward from the base 11. The second fixed terminal 14 is fixed to the base 11. The front end of the second fixed terminal 14 protrudes outward from the base 11.

[0037] The first fixed terminal 13 is connected to a first fixed contact 21 and a third fixed contact 23. The first fixed contact 21 and the third fixed contact 23 are arranged to be separated from each other in the support direction (Z1, Z2) in the first fixed terminal 13. The second fixed contact 22 and the fourth fixed contact 24 are connected to the second fixed terminal 14. The second fixed contact 22 and the fourth fixed contact 24 are arranged to be separated from each other in the support direction (Z1, Z2) in the second fixed terminal 14. The first to fourth fixed contacts 21 to 24 are formed of a conductive material such as silver or copper.

[0038] The contact block 2 includes a first movable contact piece 15, a second movable contact piece 16 and a movable member 17. The first movable contact piece 15 and the second movable contact piece 16 extend in the lateral direction (X1, X2). The first movable contact piece 15 and the second movable contact piece 16 are independent of each other. The first movable contact piece 15 and the second movable contact piece 16 are arranged separately from each other in the supporting direction (Z1, Z2). The first movable contact piece 15 is arranged between the second movable contact piece 16 and the base 11 in the supporting direction (Z1, Z2). The first movable contact piece 15 and the second movable contact piece 16 are formed of a conductive material such as copper.

[0039] The first movable contact 31 and the second movable contact 32 are connected to the first movable contact piece 15. The first movable contact 31 and the second movable contact 32 are arranged to be separated from each other in the lateral direction (X1, X2). The first movable contact 31 is arranged to face the first fixed contact 21. The second movable contact 32 is arranged to face the second fixed contact 22.

[0040] The third movable contact 33 and the fourth movable contact 34 are connected to the second movable contact piece 16. The third movable contact 33 and the fourth movable contact 34 are arranged to be separated from each other in the lateral direction (X1, X2). The third movable contact 33 is arranged opposite to the third fixed contact 23. The fourth movable contact 34 is arranged opposite to the fourth fixed contact 24. The first movable contact 31 to the fourth movable contact 34 are formed of a conductive material such as silver or copper.

[0041] The movable member 17 holds the first movable contact piece 15 and the second movable contact piece 16. The movable member 17 is made of a resin having electrical insulation properties. The movable member 17 is supported by the housing 3 in the supporting directions (Z1, Z2). The movable member 17 can slide relative to the housing 3 in the moving directions (Y1, Y2). The movable member 17 can move between a closed position and an open position. Figure 5 In the embodiment, the movable member 17 is in the disconnected position. When the movable member 17 is in the disconnected position, the movable contacts 31 to 34 are separated from the fixed contacts 21 to 24 respectively. Figure 6 In the embodiment, the moving member 17 is located at the closed position. When the moving member 17 is at the closed position, the movable contacts 31 to 34 are in contact with the fixed contacts 21 to 24, respectively.

[0042] The coil block 4 moves the first movable contact piece 15 and the second movable contact piece 16 by electromagnetic force. The coil block 4 moves the first movable contact piece 15 and the second movable contact piece 16 along the first moving direction (Y1) and the second moving direction (Y2). The first moving direction (Y1) is the direction in which the movable contacts 31 to 34 contact the fixed contacts 21 to 24 in the moving direction (Y1, Y2). The second moving direction (Y2) is the direction in which the movable contacts 31 to 34 move away from the fixed contacts 21 to 24 in the moving direction (Y1, Y2). The coil block 4 includes a coil 61, a bobbin 62, a movable iron core 63, a fixed iron core 64, and a yoke 65.

[0043] The coil 61 is wound around the bobbin 62. The axis of the coil 61 extends along the moving direction (Y1, Y2). The coil 61 is connected to the coil terminals 66, 67. Figure 2 and Figure 3 As shown, the coil terminals 66 and 67 protrude from the coil block 4 along the first supporting direction (Z1). The coil terminals 66 and 67 protrude outward from the base 11.

[0044] like Figure 4As shown, the bobbin 62 includes a bobbin hole 621 extending along the moving direction (Y1, Y2). At least a portion of the movable iron core 63 is arranged in the bobbin hole 621 of the bobbin 62. The movable iron core 63 is configured to be movable along the first moving direction (Y1) and the second moving direction (Y2). The fixed iron core 64 is arranged in the bobbin hole 621 of the bobbin 62. The fixed iron core 64 is arranged opposite to the movable iron core 63 in the moving direction (Y1, Y2). The coil 61 generates an electromagnetic force that moves the movable iron core 63 along the first moving direction (Y1) by energizing.

[0045] The movable iron core 63 is connected to the movable member 17. The first movable contact piece 15 is electrically insulated from the movable iron core 63 by the movable member 17. The second movable contact piece 16 is electrically insulated from the movable iron core 63 by the movable member 17. The movable iron core 63 and the movable member 17 move integrally in the moving direction (Y1, Y2). The movable iron core 63 moves in the first moving direction (Y1) according to the magnetic force generated from the coil 61. As the movable iron core 63 moves, the movable member 17 moves to the closed position. As the movable member 17 moves, the first movable contact piece 15 and the second movable contact piece 16 move in the first moving direction (Y1) or the second moving direction (Y2).

[0046] The yoke 65 is arranged in a manner to surround the coil 61. The yoke 65 is arranged on the magnetic circuit formed by the coil 61. The yoke 65 includes a first yoke 73, a second yoke 74, a third yoke 75 and a fourth yoke 76. The first yoke 73 and the second yoke 74 extend in the lateral direction (X1, X2) and the supporting direction (Z1, Z2). The first yoke 73 and the second yoke 74 are opposite to the coil 61 in the moving direction (Y1, Y2). The coil 61 is located between the first yoke 73 and the second yoke 74 in the moving direction (Y1, Y2). The second yoke 74 is connected to the fixed core 64.

[0047] The third yoke 75 and the fourth yoke 76 extend in the moving direction (Y1, Y2) and the supporting direction (Z1, Z2). The third yoke 75 and the fourth yoke 76 are opposite to the coil 61 in the lateral direction (X1, X2). The coil 61 is located between the third yoke 75 and the fourth yoke 76 in the lateral direction (X1, X2).

[0048] Figure 7: is a three-dimensional diagram of the movable member 17 and its periphery. The movable member 17 includes a support portion 25, a connection portion 26, and a connecting portion 27. The support portion 25 supports the first movable contact piece 15 and the second movable contact piece 16. The connection portion 26 is connected to the movable iron core 63. The connecting portion 27 is located between the support portion 25 and the connection portion 26. The connecting portion 27 connects the support portion 25 and the connection portion 26. The connecting portion 27 is connected to the central portion of the support portion 25 in the supporting direction (Z1, Z2). The connecting portion 27 is connected to the support portion 25 at a position between the first movable contact piece 15 and the second movable contact piece 16 in the supporting direction (Z1, Z2). The connecting portion 27 extends along the moving direction (Y1, Y2).

[0049] The support portion 25 extends along the support direction (Z1, Z2). The support portion 25 extends from the first movable contact piece 15 toward the base 11 along the first support direction (Z1). Figure 4 As shown, the support portion 25 extends from the second movable contact piece 16 toward the top surface 123 of the housing 12 along the second support direction (Z2). The support portion 25 includes a first support hole 28, a second support hole 29, and a partition wall 30. The first movable contact piece 15 is disposed in the first support hole 28. The first movable contact piece 15 is supported by the support portion 25 between the first movable contact point 31 and the second movable contact point 32. The first movable contact piece 15 extends from the support portion 25 along the first lateral direction (X1) and the second lateral direction (X2).

[0050] The second movable contact piece 16 is arranged in the second support hole 29. The second movable contact piece 16 is supported by the support portion 25 between the third movable contact point 33 and the fourth movable contact point 34. The second movable contact piece 16 extends from the support portion 25 along the first lateral direction (X1) and the second lateral direction (X2). The partition wall 30 divides the first support hole 28 and the second support hole 29. The partition wall 30 is arranged between the first movable contact piece 15 and the second movable contact piece 16.

[0051] like Figure 2 and Figure 4 As shown, the base 11 includes a bottom surface 55, a first wall portion 56, a second wall portion 57, a third wall portion 58, and a fourth wall portion 59. The bottom surface 55 supports the contact block 2 and the coil block 4 in the supporting directions (Z1, Z2). The bottom surface 55 is located in the first supporting direction (Z1) relative to the contact block 2 and the coil block 4. The first wall portion 56, the second wall portion 57, the third wall portion 58, and the fourth wall portion 59 extend from the bottom surface 55 along the second supporting direction (Z2).

[0052] The first wall portion 56 and the second wall portion 57 are arranged to be separated from each other in the moving direction (Y1, Y2). The first wall portion 56 and the second wall portion 57 are opposite to the support portion 25 of the moving member 17 in the moving direction (Y1, Y2). The support portion 25 is located between the first wall portion 56 and the second wall portion 57 in the moving direction (Y1, Y2). The first wall portion 56 and the second wall portion 57 extend in the lateral direction (X1, X2). The third wall portion 58 and the fourth wall portion 59 are opposite to the support portion 25 in the lateral direction (X1, X2). The support portion 25 is located between the first wall portion 56 and the second wall portion 57 in the lateral direction (X1, X2). The third wall portion 58 and the fourth wall portion 59 extend in the moving direction (Y1, Y2).

[0053] The movable member 17 includes a first member 17a and a second member 17b. The first member 17a and the second member 17b are independent of each other. The second member 17b is connected to the first member 17a by a buckle. The first support hole 28 and the second support hole 29 are provided between the first member 17a and the second member 17b. The first movable contact piece 15 and the second movable contact piece 16 are held between the first member 17a and the second member 17b in the moving direction (Y1, Y2). The first member 17a is connected to the connecting portion 27. The first member 17a is formed integrally with the connecting portion 27 and the connecting portion 26.

[0054] like Figure 4 As shown, the contact block 2 includes a first contact spring 51 and a second contact spring 52. The first contact spring 51 is arranged between the first movable contact piece 15 and the support portion 25. The first contact spring 51 is arranged in the first support hole 28. In a state where the first movable contact 31 is in contact with the first fixed contact 21 and the second movable contact 32 is in contact with the second fixed contact 22, the first contact spring 51 presses the first movable contact piece 15 toward the first fixed terminal 13 and the second fixed terminal 14. The first contact spring 51 is a coil spring and is in a state of natural length when the movable member 17 is in the disconnected position. The first movable contact piece 15 is connected to the movable member 17 via the first contact spring 51.

[0055] The second contact spring 52 is arranged between the second movable contact piece 16 and the support portion 25. The second contact spring 52 is arranged in the second support hole 29. In a state where the third movable contact 33 is in contact with the third fixed contact 23 and the fourth movable contact 34 is in contact with the fourth fixed contact 24, the second contact spring 52 presses the second movable contact piece 16 toward the first fixed terminal 13 and the second fixed terminal 14. The second contact spring 52 is a coil spring and is in a state of natural length when the movable member 17 is in the disconnected position. The second movable contact piece 16 is connected to the movable member 17 via the second contact spring 52.

[0056] The connecting portion 26 extends in the transverse direction (X1, X2). Figure 7 As shown, the connecting portion 26 includes a core connecting portion 37, a first mounting portion 38 and a second mounting portion 39. The core connecting portion 37 is located between the first mounting portion 38 and the second mounting portion 39. The core connecting portion 37 is connected to the connecting portion 27. Figure 4 and Figure 7 As shown, the core connection portion 37 includes a hole 43 and a locking groove 44. The hole 43 extends along the supporting directions (Z1, Z2). The hole 43 is open toward the first supporting direction (Z1). The locking groove 44 is connected to the hole 43 and extends toward the second supporting direction (Z2). The width of the locking groove 44 is narrower than the width of the hole 43.

[0057] The movable iron core 63 includes a cylinder 71, a shaft 77, and a head 78. The shaft 77 protrudes from the cylinder 71 toward the moving member 17. The outer diameter of the shaft 77 is smaller than the outer diameter of the cylinder 71. The outer diameter of the head 78 is larger than the outer diameter of the shaft 77. The outer diameter of the head 78 is larger than the width of the locking groove 44. The shaft 77 is arranged in the locking groove 44. The head 78 is arranged in the hole 43.

[0058] like Figure 7 As shown, the first mounting portion 38 extends from the core connecting portion 37 along the first lateral direction (X1). The first mounting portion 38 includes a first protrusion 45. The first protrusion 45 protrudes from the first mounting portion 38 toward the coil block 4. The second mounting portion 39 extends from the core connecting portion 37 along the second lateral direction (X2). The second mounting portion 39 includes a second protrusion 46. The second protrusion 46 protrudes from the second mounting portion 39 toward the coil block 4.

[0059] The electromagnetic relay 1 includes a first return spring 53 and a second return spring 54. The first return spring 53 and the second return spring 54 are arranged between the moving part 17 and the coil block 4. The first return spring 53 is located in the first lateral direction (X1) relative to the core connection part 37. The second return spring 54 is located in the second lateral direction (X2) relative to the core connection part 37. In other words, the core connection part 37 is located between the first return spring 53 and the second return spring 54 in the lateral direction (X1, X2). The first return spring 53 and the second return spring 54 apply force to the moving part 17 in the second moving direction (Y2). The first return spring 53 is installed on the first protrusion 45. The second return spring 54 is installed on the second protrusion 46.

[0060] Next, the operation of the electromagnetic relay 1 is described. When the coil 61 is not energized, the coil block 4 is not excited. In this case, the elastic force of the return springs 53 and 54 presses the movable member 17 and the movable iron core 63 in the second moving direction (Y2), and the movable member 17 is located in Figure 5In this state, the first movable contact piece 15 and the second movable contact piece 16 are also pressed in the second moving direction (Y2) via the movable member 17. Therefore, when the movable member 17 is in the disconnected position, the first movable contact 31 and the second movable contact 32 are separated from the first fixed contact 21 and the second fixed contact 22. Similarly, when the movable member 17 is in the disconnected position, the third movable contact 33 and the fourth movable contact 34 are separated from the third fixed contact 23 and the fourth fixed contact 24.

[0061] If the coil 61 is energized, the coil block 4 is excited. In this case, the movable iron core 63 overcomes the elastic force of the return springs 53 and 54 and moves in the first moving direction (Y1) by the electromagnetic force of the coil 61. As a result, the movable member 17, the first movable contact piece 15, and the second movable contact piece 16 move together in the first moving direction (Y1). Figure 6 As shown in FIG. 1 , the movable member 17 moves to the closed position. As a result, when the movable member 17 is in the closed position, the first movable contact 31 and the second movable contact 32 are in contact with the first fixed contact 21 and the second fixed contact 22, respectively. Similarly, when the movable member 17 is in the closed position, the third movable contact 33 and the fourth movable contact 34 are in contact with the third fixed contact 23 and the fourth fixed contact 24, respectively. Thus, the first movable contact piece 15 and the second movable contact piece 16 are electrically connected to the first fixed terminal 13 and the second fixed terminal 14.

[0062] When the current flowing to the coil 61 stops and the coil 61 is demagnetized, the elastic force of the return springs 53 and 54 presses the movable iron core 63 in the second moving direction (Y2). As a result, the movable member 17, the first movable contact piece 15, and the second movable contact piece 16 move together in the second moving direction (Y2). Figure 5 As shown in FIG. 1 , the movable member 17 moves to the disconnected position. As a result, when the movable member 17 is in the disconnected position, the first movable contact 31 and the second movable contact 32 are separated from the first fixed contact 21 and the second fixed contact 22. Similarly, when the movable member 17 is in the disconnected position, the third movable contact 33 and the fourth movable contact 34 are separated from the third fixed contact 23 and the fourth fixed contact 24.

[0063] Next, a fixing structure for fixing the first fixed terminal 13 and the second fixed terminal 14 to the base 11 will be described. Figure 8 It is a perspective view of the base 11 , the first fixed terminal 13 , and the second fixed terminal 14 . Fig. 9 1 is a bottom view of the base 11 and the first fixed terminal 13 and the second fixed terminal 14. In the following description, the bottom refers to the first supporting direction (Z1). The top refers to the second supporting direction (Z2). Figure 8 and Fig. 9As shown in FIG. 1 , the electromagnetic relay 1 includes a fixing member 80. The first fixing terminal 13 and the second fixing terminal 14 are fixed to the base 11 by the fixing member 80. The base 11 is made of a thermosetting resin such as a phenolic resin, for example.

[0064] Fig.10 and Fig.11 It is an exploded view of the base 11 and the fixing component 80 . Fig.12 yes Fig. 9 The XII-XII section view in FIG. Fig.10 and Fig.11 As shown, the base 11 includes a first hole 91, a second hole 92 and an opening 93. The first hole 91 and the second hole 92 pass through the base 11 in the up and down directions. The opening 93 is adjacent to the first hole 91 and the second hole 92. Fig. 9 As shown, a first fixed terminal 13 is arranged in the first hole 91. The first fixed terminal 13 extends through the first hole 91. A second fixed terminal 14 is arranged in the second hole 92. The second fixed terminal 14 extends through the second hole 92. An opening 93 is arranged on the lower surface of the base 11. The opening 93 is adjacent to the first hole 91 and the second hole 92.

[0065] The fixing member 80 is independent of the base 11. The fixing member 80 is formed of a material having higher elasticity than the thermosetting resin. The fixing member 80 is made of nylon, for example. The fixing member 80 fixes the first fixing terminal 13 and the second fixing terminal 14 to the base 11. Fig.11 As shown, the fixing member 80 includes a first supporting wall 81, a second supporting wall 82, and a connecting portion 83. The first supporting wall 81, the connecting portion 83, and the second supporting wall 82 are formed integrally with each other.

[0066] The first support wall 81 extends upward from the connecting portion 83. The first support wall 81 extends upward along the first fixed terminal 13. The first support wall 81 is arranged between the inner surface of the first hole 91 and the first fixed terminal 13. The upper surface of the first support wall 81 is located above the bottom surface 55 of the base 11. A first recess 84 is arranged on the upper surface of the first support wall 81. The first recess 84 faces the first fixed terminal 13. The first recess 84 is open to the first fixed terminal 13 side.

[0067] like Figure 8 and Fig.12 As shown, the first concave portion 84 is filled with a first adhesive 85. Figure 8 In the figure, for easy understanding, the first adhesive 85 is marked with hatching. The first adhesive 85 is cured to bond the first support wall 81 and the first fixed terminal 13. The first adhesive 85 is made of a harder material than the fixing member 80. That is, the first adhesive 85 has a higher rigidity than the fixing member 80. The first adhesive 85 is, for example, an epoxy resin-based adhesive material.

[0068] The second support wall 82 is arranged in the horizontal direction (X1, X2) with the first support wall 81. The second support wall 82 extends upward from the connecting portion 83. The second support wall 82 extends upward along the second fixed terminal 14. The second support wall 82 is arranged between the inner surface of the second hole 92 and the second fixed terminal 14. The upper surface of the second support wall 82 is located above the bottom surface 55 of the base 11. A second recess 86 is arranged on the upper surface of the second support wall 82. The second recess 86 faces the second fixed terminal 14. The second recess 86 is open to the second fixed terminal 14 side.

[0069] The second recess 86 is filled with a second adhesive 87. Figure 8 , the second adhesive 87 is hatched. The second adhesive 87 is cured to bond the second support wall 82 and the second fixed terminal 14. The second adhesive 87 is made of a harder material than the fixing member 80. That is, the second adhesive 87 has a higher rigidity than the fixing member 80. The second adhesive 87 is, for example, an epoxy resin-based adhesive material.

[0070] The connection portion 83 connects the first support wall 81 and the second support wall 82 . The connection portion 83 extends in the lateral direction ( X1 , X2 ). The height of the connection portion 83 is lower than the heights of the first support wall 81 and the second support wall 82 . The connection portion 83 is disposed in the opening 93 .

[0071] The fixing member 80 includes a plurality of first protrusions 88a, 88b and a plurality of second protrusions 89a, 89b. The plurality of first protrusions 88a, 88b and the plurality of second protrusions 89a, 89b protrude from the connecting portion 83. The plurality of first protrusions 88a, 88b and the plurality of second protrusions 89a, 89b are arranged in the opening 93. The plurality of first protrusions 88a, 88b and the plurality of second protrusions 89a, 89b protrude toward the inner surface of the opening 93. The plurality of first protrusions 88a, 88b are arranged with the first support wall 81 in the moving direction (Y1, Y2). The plurality of second protrusions 89a, 89b are arranged with the second support wall 82 in the moving direction (Y1, Y2). The plurality of first protrusions 88a, 88b and the plurality of second protrusions 89a, 89b are in contact with the inner surface of the opening 93, and the fixing member 80 is arranged in the opening 93 by being pressed.

[0072] Fig.13 is an enlarged view of the first protrusion 88a. Fig.13As shown, the first protrusion 88a includes a curved front end 881. The other first protrusions 88b and the second protrusions 89a, 89b have the same shape as the first protrusion 88a. The number of the first protrusions 88a, 88b is not limited to 2, but may be 1. Alternatively, the number of the first protrusions 88a, 88b may be more than 2. The number of the second protrusions 89a, 89b is not limited to 2, but may be 1. Alternatively, the number of the second protrusions 89a, 89b may be more than 2.

[0073] like Fig. 9 and Fig.10 As shown, the base 11 includes a first cutout 94 and a second cutout 95. The first cutout 94 is arranged at the edge of the first hole 91 on the lower surface of the base 11. The first cutout 94 faces the first fixed terminal 13. The second cutout 95 is arranged at the edge of the second hole 92 on the lower surface of the base 11. The second cutout 95 faces the second fixed terminal 14.

[0074] In the electromagnetic relay 1 of the present embodiment described above, the base 11 is made of a thermosetting resin. Therefore, it has high heat resistance. In addition, the first fixed terminal 13 and the second fixed terminal 14 are fixed to the base 11 by a fixing member 80. The fixing member 80 has an elasticity higher than that of the thermosetting resin. Therefore, it is possible to suppress the cracking of the base 11 or the generation of resin chips. In addition, the first fixed terminal 13 is bonded to the first support wall 81 by a first adhesive 85. The second fixed terminal 14 is bonded to the second support wall 82 by a second adhesive 87. Therefore, the first fixed terminal 13 and the second fixed terminal 14 are firmly fixed to the fixing member 80. In addition, when the electromagnetic relay 1 is actuated, the bouncing of the first fixed terminal 13 and the second fixed terminal 14 can be suppressed.

[0075] The base 11 is provided with a first notch 94 and a second notch 95. When assembling the electromagnetic relay 1, the first fixed terminal 13 can be temporarily fixed to the base 11 by filling the first notch 94 with adhesive while the first fixed terminal 13 is arranged in the first hole 91. Furthermore, the second fixed terminal 14 can be temporarily fixed to the base 11 by filling the second notch 95 with adhesive while the second fixed terminal 14 is arranged in the second hole 92. Thereafter, by attaching the fixing member 80 to the base 11, the first fixed terminal 13 and the second fixed terminal 14 can be easily fixed to the base 11.

[0076] As mentioned above, although one embodiment of the present invention has been described, the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the gist of the invention.

[0077] In the above-mentioned embodiment, the movable contacts 31 to 34 are separated from the fixed contacts 21 to 24 by pushing the movable component 17 in the second moving direction (Y2) by the coil block 4. In addition, the movable contacts 31 to 34 are brought into contact with the fixed contacts 21 to 24 by pulling the movable component 17 in the first moving direction (Y1) by the coil block 4. However, the movement direction of the movable component 17 for opening and closing the contacts may be opposite to that in the above-mentioned embodiment. That is, the movable contacts 31 to 34 may be brought into contact with the fixed contacts 21 to 24 by pushing the movable component 17 in the second moving direction (Y2) by the coil block 4. The movable contacts 31 to 34 may be separated from the fixed contacts 21 to 24 by pulling the movable component 17 in the first moving direction (Y1) by the coil block 4.

[0078] The shapes or configurations of the first fixed terminal 13, the second fixed terminal 14, the first movable contact piece 15, and the second movable contact piece 16 may also be changed. For example, the first fixed terminal 13 and the second fixed terminal 14 may protrude from the base 11 in a direction different from that in the above-mentioned embodiment. The first movable contact piece 15 and the second movable contact piece 16 may also be integrated. That is, the first movable contact 31 to the fourth movable contact 34 may also be connected to the integrated movable contact piece. Alternatively, the second movable contact piece 16, the third movable contact 33, the fourth movable contact 34, the third fixed contact 23, and the fourth fixed contact 24 may also be omitted.

[0079] The shape or arrangement of the coil 61, bobbin 62, movable iron core 63, fixed iron core 64, or yoke 65 may be changed. The shape or arrangement of the first to fourth fixed contacts 21 to 24 may be changed. The shape or arrangement of the first to fourth movable contacts 31 to 34 may be changed. The shape of the base 11 may be changed.

[0080] The first fixed contact 21 and / or the third fixed contact 23 may also be integrated with the first fixed terminal 13. The first fixed contact 21 and / or the third fixed contact 23 may also be a part of the first fixed terminal 13 and coplanar with other parts of the first fixed terminal 13. The second fixed contact 22 and / or the fourth fixed contact 24 may also be integrated with the second fixed terminal 14. The second fixed contact 22 and / or the fourth fixed contact 24 may also be a part of the second fixed terminal 14 and coplanar with other parts of the second fixed terminal 14.

[0081] The first movable contact 31 and / or the second movable contact 32 may also be integrated with the first movable contact piece 15. The first movable contact 31 and / or the second movable contact 32 may also be a part of the first movable contact piece 15 and be coplanar with other parts of the first movable contact piece 15. The third movable contact 33 and / or the fourth movable contact 34 may also be integrated with the second movable contact piece 16. The third movable contact 33 and / or the fourth movable contact 34 may also be a part of the second movable contact piece 16 and be coplanar with other parts of the second movable contact piece 16.

[0082] The shape of the movable member 17 is not limited to the above-mentioned embodiment, and may be changed. The shape of the first member 17a may be changed. For example, the first member 17a may be independent of the connecting portion 27 and the connecting portion 26. The shape of the second member 17b may be changed. The shape of the connecting portion 27 may be changed. The shape of the connecting portion 26 may be changed.

[0083] The materials of the base 11, the fixing member 80, the first adhesive 85, and the second adhesive 87 are not limited to the above-mentioned embodiments, and may be changed. The shape of the base 11 is not limited to the shape of the above-mentioned embodiments, and may be changed. For example, the position or shape of the first hole 91 and the second hole 92 may be changed. The position or shape of the opening 93 may be changed. The position or shape of the first cutout 94 and the second cutout 95 may be changed. The first cutout 94 and the second cutout 95 may be omitted.

[0084] The shape of the fixing component 80 is not limited to the shape of the above-mentioned embodiment, and can also be changed. For example, the position or shape of the first support wall 81 and the second support wall 82 can also be changed. The position or shape of the connecting portion 83 can also be changed. The position or shape of the first protrusions 88a, 88b and the second protrusions 89a, 89b can also be changed. The first protrusions 88a, 88b and the second protrusions 89a, 89b can also be omitted. The fixing component 80 can also be divided into two or more parts. For example, the fixing component 80 can also be divided at the connecting portion 83. The first fixed terminal 13 and the second fixed terminal 14 can also be fixed by the respectively divided parts.

[0085] In the electromagnetic relay of the present disclosure, cracking of the base or generation of resin scraps when the first terminal is fixed to the base can be suppressed, and bouncing of the first terminal can be suppressed when the electromagnetic relay is operated.

Claims

1. An electromagnetic relay, characterized in that: have: a base including a first hole and made of a thermosetting resin; a first terminal extending through the first hole; A fixing component, comprising a first supporting wall and a first recess, wherein the first supporting wall is arranged between the inner surface of the first hole and the first terminal and extends upward along the first terminal, and the first recess is arranged on the upper surface of the first supporting wall and faces the first terminal, and the fixing component is independent of the base and has an elasticity higher than that of the thermosetting resin, and fixes the first terminal to the base; as well as The first adhesive is filled in the first recess and bonds the first terminal and the first supporting wall.

2. The electromagnetic relay according to claim 1, characterized in that: The base further comprises a second hole, The electromagnetic relay also has: a second terminal extending through the second hole; as well as The second adhesive, The fixing member also includes: a second supporting wall disposed between an inner surface of the second hole and the second terminal and extending upward along the second terminal; as well as a second recessed portion disposed on an upper surface of the second supporting wall and facing the second terminal, The second adhesive is filled in the second recess to bond the second terminal to the second support wall.

3. The electromagnetic relay according to claim 2, characterized in that: The fixing member further includes a connecting portion connecting the first supporting wall and the second supporting wall. The first supporting wall, the connecting portion, and the second supporting wall are formed integrally with each other.

4. The electromagnetic relay according to claim 2 or 3, characterized in that: The second adhesive is made of a material harder than the fixing member.

5. The electromagnetic relay according to claim 1, characterized in that: The first adhesive is made of a material harder than the fixing member.

6. The electromagnetic relay according to claim 1, characterized in that: The base further includes an opening adjacent to the first hole, The fixing member is arranged in the opening by being pressed in, The fixing member further includes a plurality of protrusions disposed in the opening and in contact with the base.

7. The electromagnetic relay according to claim 6, characterized in that: The protrusion extends in the up-down direction and includes a curved front end.

8. The electromagnetic relay according to claim 1, characterized in that: The base includes a cutout disposed at an edge of the first hole.

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