Electromagnetic relay

Abstract

The present invention provides an electromagnetic relay capable of ensuring a large insulation distance with a movable contact piece. The movable component is made of an electrical insulator. The movable component can slide relative to a housing along a moving direction. The movable component includes a retaining portion and a connecting portion. The retaining portion retains a first movable contact piece. The connecting portion is connected to a movable iron core. The connecting portion includes a locking groove and a locking protrusion. The end of the movable iron core is arranged in the locking groove. The locking protrusion presses the end of the movable iron core in the locking groove. The locking protrusion has a shape extending along a supporting direction.

Description

Technical Field

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

[0002] Among electromagnetic relays, there is an electromagnetic relay in which a movable contact piece is held by a bracket (see Patent Document 1). The bracket is connected to the movable iron core via a rotating shaft. Due to the magnetic field generated by the coil, an electromagnetic force acts on the movable iron core, and the movable iron core moves due to the electromagnetic force. The movable contact piece moves together with the rotating shaft and the bracket according to the movement of the movable iron core. As a result, the contacts are opened and closed.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2017-204480

[0004] Generally speaking, the above-mentioned rotating shaft is made of metal, and it is difficult to ensure a large insulation distance between the rotating shaft and the movable contact piece. Summary of the invention

[0005] An object of the present invention is to ensure a large insulation distance with a movable contact piece in an electromagnetic relay.

[0006] An electromagnetic relay of one embodiment of the present invention comprises a first fixed terminal, a first fixed contact, a second fixed terminal, a second fixed contact, a first movable contact piece, a first movable contact, a second movable contact, a moving part, a housing, a coil and a movable iron core. The first fixed contact is connected to the first fixed terminal. The second fixed contact is connected to the second fixed terminal. The first movable contact is connected to the first movable contact piece and is opposite to the first fixed contact. The second movable contact is connected to the first movable contact piece and is opposite to the second fixed contact. The moving part holds the first movable contact piece. The moving part can move in the direction in which the first movable contact and the second movable contact contact the first fixed contact and the second fixed contact, and in the direction in which the first movable contact and the second movable contact leave the first fixed contact and the second fixed contact. The housing supports the moving part in a supporting direction perpendicular to the moving direction of the moving part. The movable iron core is connected to the moving part and can move by the magnetic force generated by the coil.

[0007] The movable part is made of an electrical insulator. The movable part can slide relative to the housing in a moving direction. The movable part includes a retaining portion and a connecting portion. The retaining portion retains a first movable contact piece. The connecting portion is connected to the movable iron core. The connecting portion includes a locking groove and a locking protrusion. The end of the movable iron core is arranged in the locking groove. The locking protrusion presses the end of the movable iron core in the locking groove. The locking protrusion has a shape extending in the supporting direction.

[0008] In the electromagnetic relay of this embodiment, the first movable contact piece is connected to the movable iron core via a movable component. The movable component is made of an insulator. Therefore, it is possible to ensure that the insulation distance between the first movable contact piece and the movable iron core is large. In addition, the locking protrusion presses the end of the movable iron core in the locking groove. Therefore, the end of the movable iron core is connected to the movable component by pressing in. In addition, the locking protrusion has a shape extending along the supporting direction. Therefore, the end of the movable iron core is connected to the movable component by pressing in a line contact instead of a point contact. Thereby, the movable component can be prevented from falling over and the movable component can be stably supported. As a result, stable operating characteristics can be obtained.

[0009] The locking protrusion may also be longer than the end of the movable iron core in the supporting direction. In this case, the moving member can be prevented from falling down, and the moving member can be stably supported.

[0010] The locking groove may also extend in the supporting direction. In the supporting direction, the locking protrusion may also be longer than the locking groove. In this case, the moving part can be prevented from falling over, thereby stably supporting the moving part.

[0011] The locking protrusion may also have a curved shape in a cross section perpendicular to the supporting direction. In this case, the inclination of the first movable contact piece in the lateral direction can be suppressed compared to the case where the locking protrusion is a plane. Thus, the distance between the first movable contact and the first fixed contact, and the distance between the second movable contact and the second fixed contact can be set with high precision. In addition, since the locking protrusion is in line contact with the end of the movable iron core, the locking protrusion is easily elastically deformed compared to the case where the locking protrusion is a plane. Therefore, it is possible to suppress the damage of the moving parts due to the excessive load generated by pressing.

[0012] The movable member may further include a connecting portion. The connecting portion may connect the holding portion and the connecting portion and extend along the moving direction. In this case, a larger insulation distance between the first movable contact piece and the movable iron core can be ensured.

[0013] The holding portion may also extend in the supporting direction. The connecting portion may also be connected to the central portion of the holding portion in the supporting direction. In this case, the moving component can be prevented from falling over, thereby stably supporting the moving component.

[0014] The electromagnetic relay may also include a third fixed contact, a fourth fixed contact, a second movable contact piece, a third movable contact and a fourth movable contact. The third fixed contact may also be connected to the first fixed terminal. The fourth fixed contact may also be connected to the second fixed terminal. The third movable contact may also be connected to the second movable contact piece and be opposite to the third fixed contact. The fourth movable contact may also be connected to the second movable contact piece and be opposite to the fourth fixed contact. The holding portion may also hold the second movable contact piece. In this case, since the moving part holds the first movable contact piece and the second movable contact piece, a larger load acts on the moving part when the moving part moves. However, the locking protrusion prevents the moving part from falling over and stably supports the moving part. Thus, stable operating characteristics can be obtained.

[0015] The connecting portion may be connected to the holding portion at a position between the first movable contact piece and the second movable contact piece in the supporting direction. In this case, the moving member can be prevented from falling down, and the moving member can be stably supported.

[0016] The holding portion may also include a first sliding portion. The first sliding portion may also protrude in the supporting direction and be able to slide relative to the housing. In this case, the first sliding portion slides with the housing to exert a friction force on the moving part in the moving direction of the moving part. However, the locking protrusion prevents the moving part from falling over and stably supports the moving part. Thus, stable action characteristics can be obtained.

[0017] The holding portion may also include a second sliding portion. The second sliding portion may also protrude in a direction opposite to the supporting direction and slide relative to the housing. In this case, the sliding of the second sliding portion with the housing causes a friction force to act on the moving part in the moving direction of the moving part. However, the locking protrusion prevents the moving part from falling over, and stably supports the moving part. Thus, stable action characteristics can be obtained.

[0018] In the electromagnetic relay of the present invention, the insulation distance between the first movable contact piece and the movable iron core can be ensured to be large. In addition, the movable part can be prevented from falling down and the movable part can be stably supported. Thus, stable operating characteristics can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a perspective view of the electromagnetic relay according to the embodiment.

[0020] Figure 2 This is an exploded perspective view of an electromagnetic relay.

[0021] Figure 3 This is an exploded perspective view of an electromagnetic relay.

[0022] Figure 4 It is a longitudinal cross-sectional view of an electromagnetic relay.

[0023] Figure 5 is a top view of the electromagnetic relay with the moving part in the off position.

[0024] Figure 6 is a top view of an electromagnetic relay with the moving part in the closed position.

[0025] Figure 7 It is a three-dimensional diagram of the moving parts and their surroundings.

[0026] Figure 8 It is an exploded perspective view of the moving parts.

[0027] Fig. 9 It is an exploded perspective view of the moving parts.

[0028] Fig.10 It is a longitudinal section view of the moving parts.

[0029] Fig.11 is a cross-sectional view of the electromagnetic relay viewed from the first moving direction.

[0030] Fig.12 is a partial cross-sectional view of the first component.

[0031] Fig.13 It is a cross-sectional view of the first component and the movable iron core.

[0032] Description of reference numerals:

[0033] 3…housing; 13…first fixed terminal; 14…second fixed terminal; 15…first movable contact piece; 16…second movable contact piece; 17…movable component; 17a…first component; 17b…second component; 21…first fixed contact; 22…second fixed contact; 23…third fixed contact; 24…fourth fixed contact; 26…connecting portion; 27…connecting portion; 31…first movable contact; 32…second movable contact; 33…third movable contact; 34…fourth movable contact; 44…locking groove; 61…coil; 63…movable iron core; 68a…first sliding portion; 69a…second sliding portion; 91…locking protrusion. DETAILED DESCRIPTION

[0034] 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 .

[0035] 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 In the embodiment, 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.

[0036] 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.

[0037] 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 module 4 are arranged relative to each other.

[0038] 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).

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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 made of nylon, for example. However, the movable member 17 may be made of a material other than nylon. 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.

[0045] 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 in 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.

[0046] 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.

[0047] like Figure 4 As shown, the bobbin 62 includes a hole 621 extending along the moving direction (Y1, Y2). At least a portion of the movable iron core 63 is arranged in the hole 621 of the bobbin 62. The movable iron core 63 is configured to be movable in the first moving direction (Y1) and the second moving direction (Y2). The fixed iron core 64 is arranged in the 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 in the first moving direction (Y1) by energizing.

[0048] 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. With the movement of the movable iron core 63, the movable member 17 moves to the closed position. With the movement of the movable member 17, 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).

[0049] 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 first yoke 73 is opposite to the moving part 17 in the moving direction (Y1, Y2). The second yoke 74 is connected to the fixed core 64.

[0050] 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).

[0051] Figure 7 : is a three-dimensional diagram of the movable part 17 and its periphery. The movable part 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).

[0052] 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).

[0053] 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.

[0054] 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).

[0055] 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).

[0056] 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.

[0057] Figure 8 and Fig. 9 1 is an exploded perspective view of the moving component 17. Figure 8 and Fig. 9As shown, the first component 17a includes a first main body 40, a first protrusion 41 and a second protrusion 42. The first main body 40 holds the first movable contact piece 15. The first main body 40 includes a first plate portion 47, a pair of first end portions 48a, 48b, a second plate portion 49 and a pair of second end portions 50a, 50b. The first plate portion 47 extends along the moving direction (Y1, Y2). The pair of first end portions 48a, 48b are the ends of the first component 17a in the first supporting direction (Z1). The pair of first end portions 48a, 48b are arranged to be separated from each other in the lateral direction (X1, X2). The pair of first end portions 48a, 48b protrude from the first plate portion 47 along the first supporting direction (Z1). The first protrusion 41 protrudes from the first plate portion 47 along the first supporting direction (Z1).

[0058] The second plate portion 49 extends in the moving direction (Y1, Y2). The pair of second end portions 50a, 50b are the ends of the first component 17a in the second supporting direction (Z2). The pair of second end portions 50a, 50b are arranged to be separated from each other in the lateral direction (X1, X2). The pair of second end portions 50a, 50b protrude from the second plate portion 49 in the second supporting direction (Z2). The second protrusion 42 protrudes from the second plate portion 49 in the second supporting direction (Z2).

[0059] Fig.10 1 is a longitudinal sectional view of the moving part 17. Fig.10 As shown, the first protrusion 41 includes a first locking surface 410 and a first tapered surface 411. The first locking surface 410 extends from the first main body 40 along the first supporting direction (Z1). The first tapered surface 411 is inclined relative to the first supporting direction (Z1). The second protrusion 42 includes a second locking surface 420 and a second tapered surface 421. The second locking surface 420 extends from the first main body 40 along the second supporting direction (Z2). The second tapered surface 421 is inclined relative to the second supporting direction (Z2).

[0060] The first component 17a includes first sliding parts 68a, 68b and a pair of second sliding parts 69a, 69b. The first sliding parts 68a, 68b protrude from the first end parts 48a, 48b along the first supporting direction (Z1) and can slide relative to the base 11. The first sliding parts 68a, 68b extend in the moving directions (Y1, Y2), respectively. The first sliding parts 68a, 68b are arranged to be separated from each other in the lateral direction (X1, X2). The pair of second sliding parts 69a, 69b protrude from the second end parts 50a, 50b along the second supporting direction (Z2) and can slide relative to the housing 12. The pair of second sliding parts 69a, 69b extend in the moving directions (Y1, Y2), respectively. The pair of second sliding parts 69a, 69b are arranged to be separated from each other in the lateral direction (X1, X2).

[0061] Fig.11is a cross-sectional view of the electromagnetic relay 1 as viewed from the first moving direction (Y1). Fig.11 As shown, the housing 3 includes a first receiving surface 110 and a second receiving surface 120. The first receiving surface 110 is provided on the base 11. The first receiving surface 110 is located between the third wall portion 58 and the fourth wall portion 59. The first receiving surface 110 is opposite to the first sliding portion 68a, 68b. The portion of the first receiving surface 110 opposite to the first sliding portion 68a, 68b has a curved concave shape. The first sliding portion 68a, 68b can slide on the first receiving surface 110.

[0062] The second receiving surface 120 is provided on the housing 12. The housing 12 includes a first guide wall 121 and a second guide wall 122. The first guide wall 121 and the second guide wall 122 extend from a top surface 123 of the housing 12 along a first supporting direction (Z1). The first guide wall 121 and the second guide wall 122 extend along a moving direction (Y1, Y2). The second receiving surface 120 is located between the first guide wall 121 and the second guide wall 122. The second receiving surface 120 is opposite to the second sliding parts 69a, 69b. The portion of the second receiving surface 120 opposite to the second sliding parts 69a, 69b has a curved concave shape. The second sliding parts 69a, 69b can slide on the second receiving surface 120.

[0063] like Figure 8 and Fig. 9 As shown, the second component 17b includes a second main body 80, a first locking portion 81, a pair of first arm portions 82a, 82b, a second locking portion 83, and a pair of second arm portions 84a, 84b. The second main body 80 holds the first movable contact piece 15. The second main body 80 includes the above-mentioned partition wall 30. The second main body 80 forms a first support hole 28 and a second support hole 29 together with the first main body 40. The second main body 80 includes a first surface 85 and a second surface 86. The first surface 85 is an end surface of the second main body 80 in the first support direction (Z1). The second surface 86 is an end surface of the second main body 80 in the second support direction (Z2).

[0064] The first locking portion 81 extends in the lateral direction (X1, X2). The first locking portion 81 is connected to a pair of first arm portions 82a, 82b. A pair of first arm portions 82a, 82b connects the second main body 80 to the first locking portion 81. A pair of first arm portions 82a, 82b are arranged to be separated from each other in the lateral direction (X1, X2). The first arm portions 82a, 82b protrude from the second main body 80 along the first supporting direction (Z1). In detail, the first arm portions 82a, 82b protrude from the first surface 85 along the first supporting direction (Z1). The first arm portions 82a, 82b have a shape bent toward the first moving direction (Y1). The first arm portions 82a, 82b are respectively connected to the ends of the first locking portion 81 in the lateral direction (X1, X2). First step portions 87a, 87b are provided between the first locking portion 81 and the first arm portions 82a, 82b. The first arm portions 82a, 82b include first corner portions 88a, 88b. The first corner portions 88a, 88b are provided with rounded corners. Fig. 9 As shown, the first surface 85 includes a surface 85a located between the first arm portions 82a and 82b, a surface 85b located in the first lateral direction (X1) of the first arm portion 82a, and a surface 85c located in the second lateral direction (X2) of the first arm portion 82b. The surface 85a is located at the same height as the surfaces 85b and 85c in the supporting direction (Z1, Z2). As a result, the flexibility of the first arm portions 82a and 82b is improved.

[0065] The second locking portion 83 extends in the lateral direction (X1, X2). The second locking portion 83 is connected to a pair of second arm portions 84a, 84b. A pair of second arm portions 84a, 84b connects the second main body 80 with the second locking portion 83. A pair of second arm portions 84a, 84b are arranged to be separated from each other in the lateral direction (X1, X2). The second arm portions 84a, 84b protrude from the second main body 80 along the second supporting direction (Z2). In detail, the second arm portions 84a, 84b protrude from the second surface 86 along the second supporting direction (Z2). The second arm portions 84a, 84b have a shape bent toward the first moving direction (Y1). The second arm portions 84a, 84b are respectively connected to the ends of the second locking portion 83 in the lateral direction (X1, X2). Second step portions 89a, 89b are provided between the second locking portion 83 and the second arm portions 84a, 84b. The second arm portions 84a, 84b include second corner portions 90a, 90b. The second corner portions 90a, 90b are provided with rounded corners. Figure 8 As shown, the second surface 86 includes a surface 86a located between the second arm portions 84a and 84b, a surface 86b located in the first lateral direction (X1) of the second arm portion 84a, and a surface 86c located in the second lateral direction (X2) of the second arm portion 84b. The surface 86a is located at the same height as the surfaces 86b and 86c in the supporting direction (Z1, Z2). As a result, the flexibility of the second arm portions 84a and 84b is improved.

[0066] like Fig.10 As shown, the thickness A1 of the first arm portions 82a, 82b in the supporting direction (Z1, Z2) is smaller than the thickness A2 of the first locking portion 81 in the supporting direction (Z1, Z2). The diameter R1 of the fillet of the first corner portions 88a, 88b is larger than the thickness A1 of the first arm portions 82a, 82b in the supporting direction (Z1, Z2). The thickness A3 of the second arm portions 84a, 84b in the supporting direction (Z1, Z2) is smaller than the thickness A4 of the second locking portion 83 in the supporting direction (Z1, Z2). The diameter R2 of the fillet of the second corner portions 90a, 90b is larger than the thickness A3 of the second arm portions 84a, 84b in the supporting direction (Z1, Z2).

[0067] The first locking portion 81 is locked to the first protrusion 41 in the moving direction. In detail, the first locking portion 81 is locked to the first locking surface 410 of the first protrusion 41 in the moving direction (Y1, Y2). The second locking portion 83 is locked to the second protrusion 42 in the moving direction (Y1, Y2). In detail, the second locking portion 83 is locked to the second locking surface 420 of the second protrusion 42 in the moving direction (Y1, Y2). That is, the locking direction of the buckle is consistent with the moving direction (Y1, Y2) of the moving member 17.

[0068] 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.

[0069] 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.

[0070] The connecting portion 26 extends in the transverse direction (X1, X2). Figure 7As 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.

[0071] The movable iron core 63 includes a shaft portion 77 and a head portion 78. The shaft portion 77 and the head portion 78 protrude from the coil block 4 along the second moving direction (Y2). The width of the head portion 78 is greater than the width of the shaft portion 77. The width of the head portion 78 is greater than the width of the locking groove 44. The shaft portion 77 is disposed in the locking groove 44. The head portion 78 is disposed in the hole 43.

[0072] Fig.12 It is a partial cross-sectional view of the first component 17a. Fig.13 yes Figure 4 The first component 17a and the movable iron core are shown in the XIII-XIII cross-sectional view. Fig.12 and Fig.13 As shown, a locking protrusion 91 is provided on the inner surface of the hole 43. The locking protrusion 91 protrudes from the inner surface of the hole 43 along the first moving direction (Y1). The locking protrusion 91 has a shape extending along the supporting direction (Z1, Z2). Figure 4 As shown, in the supporting direction (Z1, Z2), the locking protrusion 91 is longer than the locking groove 44. In the supporting direction (Z1, Z2), the locking protrusion 91 is longer than the head 78 of the movable iron core 63. The locking protrusion 91 has a curved shape in a cross section perpendicular to the supporting direction (Z1, Z2). The locking protrusion 91 presses the head 78 of the movable iron core 63 in the locking groove 44. Thus, the head 78 of the movable iron core 63 is fixed to the connecting portion 26 by being pressed in.

[0073] 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.

[0074] 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.

[0075] 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 5 In 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.

[0076] 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 in the first moving direction (Y1) together. Therefore, 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.

[0077] 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.

[0078] In the electromagnetic relay 1 of the present embodiment described above, the first movable contact piece 15 is connected to the movable iron core 63 via the movable member 17. The movable member 17 is made of resin having electrical insulation properties and is directly connected to the movable iron core 63. Therefore, a large insulation distance can be ensured between the first movable contact piece 15 and the movable iron core 63.

[0079] The locking protrusion 91 presses the head 78 of the movable iron core 63 in the locking groove 44. Therefore, the head 78 of the movable iron core 63 is connected to the movable member 17 by being pressed in. In addition, the locking protrusion 91 has a shape extending along the supporting direction (Z1, Z2). Therefore, the head 78 of the movable iron core 63 is connected to the movable member 17 by being pressed in by line contact rather than point contact. As a result, the movable member 17 can be prevented from falling over and the movable member 17 can be stably supported. As a result, stable operation characteristics can be obtained.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] The shape or arrangement of the coil 61, bobbin 62, movable iron core 63, fixed iron core 64, and 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.

[0084] 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 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.

[0085] 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.

[0086] The shape of the movable part 17 is not limited to the above-mentioned embodiment and may be changed. The movable part 17 may be formed of an electrically insulating material other than resin. The first part 17a and the second part 17b may be integral. The shape of the first part 17a may also be changed. For example, the first part 17a may be independent of the connecting part 27 and the connecting part 26. The shape of the second part 17b may also be changed. The shape of the connecting part 27 may also be changed. The shape of the connecting part 26 may also be changed. The number of the first sliding parts is not limited to two and may be one or more than two. The number of the second sliding parts is not limited to two and may be one or more than two. Alternatively, the first sliding part and the second sliding part may be omitted. The number of the first arm parts is not limited to two and may be one or more than two. The number of the second arm parts is not limited to two and may be one or more than two.

[0087] In the electromagnetic relay disclosed in the present invention, the insulation distance between the first movable contact piece and the movable iron core can be ensured to be large. In addition, the movable part can be prevented from falling down and the movable part can be stably supported. Thus, stable operating characteristics can be obtained.

Claims

1. An electromagnetic relay, characterized in that: have: a first fixed terminal; a first fixed contact connected to the first fixed terminal; A second fixed terminal; a second fixed contact connected to the second fixed terminal; a first movable contact piece; a first movable contact connected to the first movable contact piece and opposite to the first fixed contact; a second movable contact connected to the first movable contact piece and opposite to the second fixed contact; a moving member that holds the first movable contact piece and is movable in a direction in which the first movable contact and the second movable contact come into contact with the first fixed contact and the second fixed contact, and in a direction in which the first movable contact and the second movable contact move away from the first fixed contact and the second fixed contact; a housing that supports the moving part in a supporting direction perpendicular to a moving direction of the moving part; Coil; as well as a movable iron core connected to the moving member and capable of being moved by the magnetic force generated by the coil, The moving parts are made of electrical insulators, The moving component is capable of sliding relative to the housing along the moving direction, The moving parts include: a supporting portion that supports the first movable contact piece; and a connecting portion connected to the movable iron core, The connecting portion comprises: A locking groove, which is configured with an end portion of the movable iron core; and a locking protrusion that presses the end of the movable iron core in the locking groove, The locking protrusion has a shape extending from a position in contact with a center portion of an end portion of the movable iron core in the supporting direction in the supporting direction and in a direction opposite to the supporting direction.

2. The electromagnetic relay according to claim 1, characterized in that: The locking protrusion is longer than an end portion of the movable iron core in the supporting direction.

3. The electromagnetic relay according to claim 1 or 2, characterized in that: The locking groove extends along the supporting direction, In the supporting direction, the locking protrusion is longer than the locking groove.

4. The electromagnetic relay according to claim 1, characterized in that: The locking protrusion has a curved shape in a cross section perpendicular to the supporting direction.

5. The electromagnetic relay according to claim 1, characterized in that: The moving member further includes a connecting portion connecting the supporting portion and the connecting portion and extending along the moving direction.

6. The electromagnetic relay according to claim 5, characterized in that: The supporting portion extends along the supporting direction, The connecting portion is connected to a central portion of the supporting portion in the supporting direction.

7. The electromagnetic relay according to claim 1, characterized in that: Also available: a third fixed contact connected to the first fixed terminal; a fourth fixed contact connected to the second fixed terminal; a second movable contact piece; a third movable contact point connected to the second movable contact piece and opposite to the third fixed contact point; as well as a fourth movable contact connected to the second movable contact piece and opposite to the fourth fixed contact, The support portion supports the second movable contact piece.

8. The electromagnetic relay according to claim 1, characterized in that: Also available: a third fixed contact connected to the first fixed terminal; a fourth fixed contact connected to the second fixed terminal; a second movable contact piece; a third movable contact point connected to the second movable contact piece and opposite to the third fixed contact point; as well as a fourth movable contact connected to the second movable contact piece and opposite to the fourth fixed contact, The support portion supports the second movable contact piece, The moving component further includes a connecting portion connecting the supporting portion and the connecting portion and extending along the moving direction. The connecting portion is connected to the supporting portion at a position between the first movable contact piece and the second movable contact piece in the supporting direction.

9. The electromagnetic relay according to claim 1, characterized in that: The support portion includes a first sliding portion that protrudes in the supporting direction and is slidable relative to the housing.

10. The electromagnetic relay according to claim 9, characterized in that: The supporting portion further includes a second sliding portion that protrudes in a direction opposite to the supporting direction and slides relative to the housing.

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