JP6051824B2 - magnetic switch - Google Patents

Description

  The present invention relates to a magnet switch mounted on a starter or the like.

  As a conventional technique, as a magnet switch used for a starter, a movable contact that is driven in the axial direction by a magnetic force generated by energizing an exciting coil and a fixed contact that is disposed to face the movable contact in the axial direction are provided. There is a switch in which energization to a motor is interrupted by the separation and connection of a movable contact and a fixed contact (see Patent Document 1).

JP 2006-9681 A

  By the way, in cold regions with severe snowfall and cold winters, for example, when the starter is operated in a vehicle that is left in a low temperature environment (below freezing point) when the inside of the engine room becomes hot and humid when the vehicle is running. Although the switch operates, the motor may not be energized and the engine may not operate. This is because moisture that has entered the inside of the magnet switch is cooled, condensed on the contact surface of the fixed contact, and frozen to form an ice film, resulting in poor contact conduction. Since the fixed contact is connected to the switch terminal connected to the vehicle-side wiring, when the outside air temperature becomes low, the temperature drops from the vicinity of the switch terminal and the contact surface is likely to freeze.

  Therefore, the present invention has been made to solve the above-described problems, and its purpose is to prevent freezing of water adhering to the contact surface that contacts the movable contact of the fixed contact in the magnet switch, It is to ensure conduction between them.

A typical magnet switch according to the present invention ( a magnet switch according to the means of claim 1) has a movable contact driven in the axial direction by a magnetic force generated by energizing the exciting coil, and is opposed to the movable contact in the axial direction. A pair of fixed contacts that are arranged and that are separated from each other when the movable contact is driven, and a core stationery that is arranged around the exciting coil to form a part of the magnetic circuit.

The fixed contact includes a plate-shaped contact portion having a contact surface to which the movable contact is separated, a connection portion to which a switch terminal for electrically connecting the fixed contact to the outside is connected, and the contact portion and the connection portion. A non-contact portion provided in a non-contact manner with another component.
The core stationery is in contact with the surface of the contact portion opposite to the contact surface via an insulating material.
Furthermore, the area of the surface on the same side as the contact surface of the non-contact portion is equal to or larger than the area of the contact surface.

According to this, even if the temperature of the connecting portion connected to the switch terminal becomes low and moisture begins to freeze, first the non-contact portion freezes first, so that the contact portion (contact surface) is prevented from freezing. be able to. Thereby, the conduction | electrical_connection defect by freezing of a contact surface can be avoided.
In addition, since the core stationery is in contact with the surface opposite to the contact surface via an insulating material, the contact portion is more likely to dissipate heat compared to the case where nothing is in contact, and the contact portion (contact surface) is frozen. Can be avoided.

(Example 1) which is sectional drawing of a magnet switch. (Example 1) which is sectional drawing of a starter. (Example 2) which is the side view and front view of a fixed contact. (Example 3) which is the side view and front view of a fixed contact. (Example 4) which is the side view and front view of a fixed contact. (Example 5) which is sectional drawing of a magnet switch. It is sectional drawing of a magnet switch (modification).

  The mode for carrying out the present invention will be described in detail with reference to the following examples.

[Example 1]
[Configuration of Example 1]
The configuration of the first embodiment will be described with reference to FIGS. 1 and 2.
In the first embodiment, an example in which the present invention is employed in a magnet switch 2 mounted on a deceleration starter 1 will be described.

  As shown in FIG. 2, the decelerating starter 1 is supported on a motor 3 that generates a rotational force, a pinion shaft 5 that is arranged in parallel with the armature shaft 4 of the motor 3, and an outer periphery of the pinion shaft 5. The pinion 6 that rotates together with the pinion shaft 5, the speed reduction device (described later) that reduces the rotational speed of the motor 3 and amplifies the drive torque, and the drive torque amplified by this speed reduction device is applied to the pinion shaft 5. A clutch 7 for transmission and a magnet switch 2 disposed on the same axis as the pinion shaft 5 are configured.

The motor 3 is disposed on the outer circumference of the commutator 8, an electromagnet field (described below) that forms a magnetic field, an armature 9 having a commutator 8 on the rear end side shaft of the armature shaft 4, and the like. This is a known commutator motor composed of a brush 10 and the like.
The electromagnet field forms a magnetic circuit, and a field magnetic pole 13 fixed by a screw 12 to the inner periphery of the yoke 11 that also serves as a housing of the motor 3, and a rectangular wire wound around the field magnetic pole 13. The field coil 14 is configured. Instead of the electromagnet field, a permanent magnet field in which a plurality of permanent magnets are arranged on the inner periphery of the yoke 11 can be adopted.

The pinion shaft 5 is inserted into the inner periphery of a spline tube 15 to be described later and is helically splined. The pinion shaft 5 is provided so as to be movable while rotating in the axial direction (the left-right direction in the drawing) with respect to the spline tube 15.
Hereinafter, the illustrated left side in the axial direction including the pinion shaft 5 and the magnet switch 2 is referred to as one axial end side, and the illustrated right side is referred to as the other axial end side. Further, when the pinion shaft 5 moves in the axial direction with respect to the spline tube 15, the right direction in the figure is defined as a switch direction and the left direction in the figure is defined as an anti-switch direction. The pinion 6 is engaged with the ring gear G by moving the pinion shaft 5 in the anti-switch direction.

  As shown in FIG. 2, the pinion shaft 5 is formed with a perforation at the center of the shaft from the end surface on the other end side in the axial direction toward one end side in the axial direction, and a steel ball 16 is disposed inside the perforation. ing.

The pinion 6 is supported by being directly spline fitted to the outer periphery of the pinion shaft 5 protruding from one axial end surface of the spline tube 15, and is splined by a pinion spring 17 disposed between the pinion shaft 5 and the pinion 6. The tube 15 is pressed against one end surface in the axial direction.
One end of the spline tube 15 in the axial direction is rotatably supported by the starter housing 19 via the ball bearing 18, and the end of the other end in the axial direction is rotatable to the center case 21 via the ball bearing 20. It is supported by. The center case 21 is arranged adjacent to the other axial end side of the starter housing 19.
A return spring 22 that biases the pinion shaft 5 in the switch direction relative to the spline tube 15 is disposed between the inner periphery of the spline tube 15 and the outer periphery of the pinion shaft 5.

  As shown in FIG. 2, the reduction gear includes a drive gear 23 formed at the end of the armature shaft 4 on the side opposite to the commutator, an idle gear 24 that meshes with the drive gear 23, and a clutch that meshes with the idle gear 24. The gear train is composed of a gear 25. The idle gear 24 is rotatably supported by a gear shaft 24a. One end of the idle gear 24 is press-fitted and fixed in a fitting hole formed in the center case 21, and the other end is attached to the starter housing 19. It is inserted and supported in the formed fitting hole. The clutch gear 25 is fitted and attached to the outer periphery of a cylindrical boss portion 26, and the boss portion 26 is supported on the outer periphery of the spline tube 15 through a bearing 27 so as to be relatively rotatable.

The clutch 7 is, for example, a roller type one-way clutch, a clutch outer 7a that forms a plurality of cam surfaces on the inner periphery, and a clutch inner (described below) disposed on the inner periphery side of the clutch outer 7a. The roller 7b is disposed between the cam surface of the clutch outer 7a and the outer peripheral surface of the clutch inner, and a spring 7c that urges the roller 7b toward the cam surface.
The clutch outer 7 a is connected to the boss portion 26 of the clutch gear 25, and the rotation of the clutch gear 25 is transmitted through the boss portion 26. The clutch inner is formed by the spline tube 15 described above. That is, the spline tube 15 also serves as a clutch inner. The roller 7b transmits the rotation of the clutch outer 7a to the clutch inner (spline tube 15), and interrupts the power transmission from the clutch inner to the clutch outer 7a.

Next, the configuration of the magnet switch 2 according to the present invention will be described mainly with reference to FIG.
The magnet switch 2 uses a suction force of an electromagnet to push out the pinion shaft 5 in the opposite switch direction, and accommodates a solenoid that opens and closes a main contact (described later) connected to the power circuit of the motor 3 in a switch case. Become.

The switch case includes a metal frame 28 that surrounds the outer periphery of one end of the solenoid in the axial direction, a resin frame 29 that is connected to the other axial end of the metal frame 28 and surrounds the outer periphery of the other end of the solenoid in the axial direction, and a resin frame 29, and an end cover 30 made of metal that closes the opening on the other axial end side.
The metal frame 28 is provided integrally with the center case 21 and extends in a cylindrical shape from the center case 21 to the other axial end side.

  The solenoid includes an exciting coil 35 that forms an electromagnet when energized, a plunger 36 that moves the inner periphery of the exciting coil 35 in the axial direction (left-right direction in the drawing), and a fixed iron core 37 that is magnetized by the electromagnet and attracts the plunger 36. An annular core plate 38 disposed on one end of the exciting coil 35 in the axial direction, a shaft 39 for transmitting the movement of the plunger 36 to the pinion shaft 5 via the steel ball 16 (see FIG. 2), and an electromagnet suction A return spring 40 that pushes back the plunger 36 when the force decreases, a drive spring 41 that stores a reaction force for pushing the pinion 6 into the ring gear G of the engine, and the like are provided.

The exciting coil 35 is configured by, for example, winding a copper wire coated with insulation around a bobbin 42 made of resin. A cylindrical sleeve 43 made of a nonmagnetic metal (for example, stainless steel) that guides the movement of the plunger 36 is inserted into the inner periphery of the bobbin 42.
The plunger 36 is provided in a stepped shape in which a step is formed on the outer peripheral surface in the radial direction so that the other end in the axial direction has a small diameter, and the central portion in the radial direction is the longitudinal direction (the left-right direction in FIG. 1). A hollow hole 44 penetrating therethrough is formed, and one end side in the axial direction of the hollow hole 44 has a small diameter hole portion 44a formed with a small hole diameter.

The fixed iron core 37 is provided in an annular shape whose central portion in the radial direction is opened in a cylindrical shape, is inserted into the inner periphery of one axial end portion of the cylindrical sleeve 43, and is disposed so as to face the plunger 36 in the axial direction. .
The core plate 38 is caulked and fixed to the fixed iron core 37 and is magnetically coupled.
A core stationery 50 disposed on the outer periphery of the exciting coil 35 is magnetically connected to the core plate 38 to form a magnetic circuit.

  The core stationery 50 is disposed at at least two locations facing each other in the circumferential direction of the exciting coil 35, and the axial piece 50 a extending in the axial direction along the outer peripheral surface of the exciting coil 35 and the other end of the axial piece 50 a. A radial piece 50b extending inward in the radial direction and covering the other axial end surface of the exciting coil 35.

  The shaft 39 is assembled to the plunger 36 through the small diameter hole 44 a of the plunger 36. A flange portion 39a having an outer diameter larger than that of the small-diameter hole portion 44a is provided at the end portion of the shaft 39 that enters the other axial end of the hollow hole 44 from the small-diameter hole portion 44a. Further, one axial end side of the shaft 39 protruding from the hollow hole 44 passes through the inner periphery of the fixed iron core 37 and protrudes so as to come into contact with the steel ball 16 (see FIG. 2).

  The main contacts are a set of fixed contacts 56 connected to the power supply circuit of the motor 3 via two terminal bolts 54 and 55, and a movable contact 57 that electrically connects and disconnects between the set of fixed contacts 56. The movable contact 57 abuts against a set of fixed contacts 56 and the fixed contacts 56 are electrically connected to each other through the movable contact 57, whereby the main contact is closed (turned on). The main contact is opened (turned off) by being electrically disconnected between the fixed contacts 56 apart from the set of fixed contacts 56.

  The two terminal bolts 54 and 55 are a B terminal bolt 54 and an M terminal bolt 55 each having a male screw portion formed on the outer periphery. A battery cable terminal connected to the positive terminal of the battery B is connected to the B terminal bolt 54, and a motor lead terminal connected to the positive brush 10 of the motor 3 is connected to the M terminal bolt 55.

  As shown in FIG. 1, the B terminal bolt 54 and the M terminal bolt 55 are inserted through a collar 60 that is insert-molded into the resin frame 29, and the front end side of the male screw portion is taken out of the resin frame 59. The washer 61 is sandwiched between them, and the nut 62 is fastened to the male screw portion to fix the washer.

The set of fixed contacts 56 is provided separately from the B terminal bolt 54 and the M terminal bolt 55, and one fixed contact 56 is electrically connected to the B terminal bolt 54 and the other fixed contact 56 is electrically connected to the M terminal bolt 55. Fixed to connect.
The fixed contact 56 has a contact surface 56a to which the movable contact 57 is separated. The contact surface 56a is provided as a plane perpendicular to the axial direction facing the other end side in the axial direction.

As shown in FIG. 1, the movable contact 57 is sandwiched between a resin insulating plate 63 and an insulating bush 64 and is held by the plunger 36.
The movable contact 57 has a plate shape and is provided so as to be detachable from the contact surface 56a of the fixed contact 56 from the other axial end side. The movable contact 57 is urged by a contact pressure spring 65 for applying contact pressure when the main contact is closed.

  The return position of the plunger 36, that is, the position where the plunger 36 is pushed back by the reaction force of the return spring 40 when the excitation to the excitation coil 35 is stopped and the attractive force of the electromagnet is lost is shown in FIG. Similarly, it is regulated by the contact between the insulating bush 64 and the end cover 30.

Next, the operation of the magnet switch 2 will be described.
When the coil is not energized, the plunger 36 is urged toward the other axial end by the return spring 40, and the movable contact 57 is separated from the fixed contact 56. That is, the main contact is in an open state, and the motor 3 is not energized.

  When the coil is energized, the plunger 36 is attracted to the fixed iron core 37 by the generated magnetic force, and the plunger 36 moves to one end side in the axial direction. Along with this, the shaft 39 moves to one end side in the axial direction, the pinion shaft 5 is pushed out, the movable contact 57 abuts against the fixed contact 56, and the motor 3 is energized.

[Features and effects of this embodiment]
According to the magnet switch 2 of the present invention, the fixed contact 56 includes the contact portion 56b having the contact surface 56a, the connection portion 56c connected to the terminal bolts 54 and 55, and the other between the contact portion 56b and the connection portion 56c. A non-contact portion 56d provided in non-contact with the component.

  In the present embodiment, the connecting portion 56c is provided on one axial end side with respect to the contact portion 56b. That is, the contact portion 56b is provided so as to extend in the radial direction perpendicular to the axial direction of the plunger 36 with the plate thickness direction as the axial direction. The fixed contact 56 is formed by bending a metal plate, and is provided with a non-contact portion 56d extending obliquely from the radially outer end of the contact portion 56b to one end side in the axial direction via the bent portion 56e. A connecting portion 56c is provided so as to extend from the radially outer end of the contact portion 56d to the one end side in the axial direction via the bent portion 56f.

  The connection portion 56c is provided with a through hole 56h that penetrates in the plate thickness direction (radial direction). The terminal bolts 54 and 55 are inserted into the through hole 56h, and the male screw portion and the nut 62 of the terminal bolts 54 and 55 are inserted. Are fixed between the heads of the terminal bolts 54 and 55 and the collar 60. For this reason, the collar 60, the terminal bolts 54 and 55, and the resin frame 29 abut on the connection portion 56c. That is, the connecting part 56c is in contact with other parts for fastening with the terminal bolts 54 and 55.

The non-contact portion 56d is provided in a non-contact manner with other components. When the surface 56j is a surface continuous with the contact surface 56a and the opposite surface is a back surface 56k, both the front surface 56j and the back surface 56k are exposed to air. Have been exposed.
The area of the surface 56j of the non-contact part 56d is larger than the area of the contact surface 56a.

  In addition, the core stationery 50 is in contact with a surface 56m of the contact portion 56b opposite to the contact surface 56a via an insulating material 70. That is, the insulating material 70 is in contact with the other axial end surface of the radial piece 50b, and the surface 56m of the contact portion 56b is in contact with the other axial end surface of the insulating material 70.

According to the configuration of the present embodiment, even if the vehicle-side wiring is cooled and heat is transferred, and the water starts to freeze from the connection portion 56c in order, the non-contact portion 56d is first frozen, so the contact portion 56b is frozen. Can be prevented. Thereby, the conduction failure by freezing of the contact surface 56a can be avoided.
In particular, by setting the area of the surface 56j of the non-contact part 56d to be equal to or larger than the area of the contact surface 56a, low-temperature heat transfer to the contact surface 56a can be further avoided, and freezing of the contact surface 56a can be prevented.

  Further, according to the configuration of the present embodiment, since the core stationery 50 is in contact with the contact portion 56b via the insulating material 70, heat is easily radiated as compared with the case where nothing is in contact with the contact portion 56b. Freezing can be avoided.

[Example 2]
A second embodiment will be described with reference to FIG. 3 with a focus on differences from the first embodiment.
In addition, the same code | symbol as Example 1 shows the same structure, Comprising: The previous description is referred.
In the present embodiment, in the fixed contact 56, the direction in which the contact portion 56b, the non-contact portion 56d, and the connection portion 56c are continuous is the length direction, and the direction perpendicular to the length direction and perpendicular to the plate thickness direction is the width direction. The non-contact part 56d is larger in the width direction than the contact part 56b and the connection part 56c.
Thereby, since the surface area of the non-contact part 56d can be enlarged, the freeze prevention effect of the contact part 56b can be improved more.

Example 3
The third embodiment will be described with reference to FIG. 4 with a focus on differences from the first embodiment.
In addition, the same code | symbol as Example 1 shows the same structure, Comprising: The previous description is referred.
According to the present embodiment, a plurality of dimples 71 are formed on the surface 56j of the non-contact portion 56d.
Thereby, since the surface area of the non-contact part 56d can be enlarged, the freeze prevention effect of the contact part 56b can be improved more.

Example 4
A third embodiment will be described with reference to FIG. 5 with a focus on differences from the first embodiment.
In addition, the same code | symbol as Example 1 shows the same structure, Comprising: The previous description is referred.
According to the present embodiment, the plurality of ribs 72 are provided on the surface 56j of the non-contact portion 56d.
Thereby, since the surface area of the non-contact part 56d can be enlarged, the freeze prevention effect of the contact part 56b can be improved more.

Example 5
A fourth embodiment will be described with reference to FIG. 6 with a focus on differences from the first embodiment.
In addition, the same code | symbol as Example 1 shows the same structure, Comprising: The previous description is referred.
In this embodiment, the fixed contact 56 forms a contact portion 56b, a non-contact portion 56d, and a connection portion 56c by bending a metal plate into a W shape.
That is, the non-contact portion 56d has a first piece 56p extending from the radially outer end of the contact portion 56b to the one end side in the axial direction through the bent portion 56o and a diameter from one end in the axial direction of the first piece 56p through the bent portion 56q. The second piece 56r extends outward in the direction. Further, a connecting portion 56c is formed so as to extend from the second piece 56r to one end side in the axial direction through the bent portion 56s.
By providing a bent portion in the non-contact portion 56d as in the present embodiment, the surface area of the non-contact portion 56d can be increased.

[Modification]
The magnet switch 2 of the embodiment pushes the pinion shaft 5 in the opposite switch direction by one plunger 36 and opens and closes the main contact connected to the power supply circuit of the motor 3. It may be a tandem type magnet switch 2 that opens and closes the main contact by separate solenoids (see, for example, JP 2009-191843 A). That is, the present invention may be applied to the solenoid SL2 in the magnet switch 2 including the solenoid SL1 for pushing out the pinion shaft 5 and the solenoid SL2 for opening and closing the main contact as shown in FIG.
The exciting coil and plunger of the solenoid SL2 correspond to the exciting coil 35 and plunger 36 of the first embodiment.

1 Starter, 2 Magnet switch, 35 Excitation coil, 50 Core stationary, 54 Terminal bolt, 55 Terminal bolt, 56 Fixed contact, 56a Contact surface, 56b Contact part, 56c Connection part, 56d Non-contact part, 57 Movable contact, 70 Insulation Material

Claims (8)

A movable contact (57) driven in the axial direction by a magnetic force generated by energizing the exciting coil (35);
A pair of fixed contacts (56) which are arranged in opposition to the movable contact (57) in the axial direction, and the movable contact (57) is separated from the movable contact (57) as the movable contact (57) is driven;
A magnet switch comprising a core stationery (50) disposed around an excitation coil (35) and forming a part of a magnetic circuit;
The fixed contact (56) includes a plate-shaped contact portion (56b) having a contact surface (56a) with which the movable contact (57) is separated, and a switch terminal (for connecting the fixed contact (56) to the outside. 54, 55) and a non-contact part (56d) provided in non-contact with other parts between the contact part (56b) and the connection part (56c). ,
The core stationery (50) is in contact with the surface of the contact portion (56b) opposite to the contact surface (56a) via an insulating material (70) ,
The area of the surface on the same side as the contact surface (56a) of the non-contact part (56d) is equal to or larger than the area of the contact surface (56a) . A movable contact (57) driven in the axial direction by a magnetic force generated by energizing the exciting coil (35);
A pair of fixed contacts (56) which are arranged in opposition to the movable contact (57) in the axial direction, and the movable contact (57) is separated from the movable contact (57) as the movable contact (57) is driven;
A magnet switch comprising a core stationery (50) disposed around an excitation coil (35) and forming a part of a magnetic circuit;
The fixed contact (56) includes a plate-shaped contact portion (56b) having a contact surface (56a) with which the movable contact (57) is separated, and a switch terminal (for connecting the fixed contact (56) to the outside. 54, 55) and a non-contact part (56d) provided in non-contact with other parts between the contact part (56b) and the connection part (56c). ,
The core stationery (50) is in contact with the surface of the contact portion (56b) opposite to the contact surface (56a) via an insulating material (70),
In the fixed contact (56), the contact portion (56b), the non-contact portion (56d), and the connection portion (56c) are formed by bending a metal plate,
A direction in which the contact part (56b), the non-contact part (56d), and the connection part (56c) are continuous is a length direction, and a direction perpendicular to the length direction and perpendicular to the plate thickness direction is a width direction.
The non-contact portion (56d) is larger in the width direction than the contact portion (56b) and the connection portion (56c) . A movable contact (57) driven in the axial direction by a magnetic force generated by energizing the exciting coil (35);
A pair of fixed contacts (56) which are arranged in opposition to the movable contact (57) in the axial direction, and the movable contact (57) is separated from the movable contact (57) as the movable contact (57) is driven;
A magnet switch comprising a core stationery (50) disposed around an excitation coil (35) and forming a part of a magnetic circuit;
The fixed contact (56) includes a plate-shaped contact portion (56b) having a contact surface (56a) with which the movable contact (57) is separated, and a switch terminal (for connecting the fixed contact (56) to the outside. 54, 55) and a non-contact part (56d) provided in non-contact with other parts between the contact part (56b) and the connection part (56c). ,
The core stationery (50) is in contact with the surface of the contact portion (56b) opposite to the contact surface (56a) via an insulating material (70),
The non-contact part (56d) is provided with a dimple shape in the magnet switch. A movable contact (57) driven in the axial direction by a magnetic force generated by energizing the exciting coil (35);
A pair of fixed contacts (56) which are arranged in opposition to the movable contact (57) in the axial direction, and the movable contact (57) is separated from the movable contact (57) as the movable contact (57) is driven;
A magnet switch comprising a core stationery (50) disposed around an excitation coil (35) and forming a part of a magnetic circuit;
The fixed contact (56) includes a plate-shaped contact portion (56b) having a contact surface (56a) with which the movable contact (57) is separated, and a switch terminal (for connecting the fixed contact (56) to the outside. 54, 55) and a non-contact part (56d) provided in non-contact with other parts between the contact part (56b) and the connection part (56c). ,
The core stationery (50) is in contact with the surface of the contact portion (56b) opposite to the contact surface (56a) via an insulating material (70),
A magnet switch, wherein the non-contact portion (56d) is provided with a rib shape . A movable contact (57) driven in the axial direction by a magnetic force generated by energizing the exciting coil (35);
A pair of fixed contacts (56) which are arranged in opposition to the movable contact (57) in the axial direction, and the movable contact (57) is separated from the movable contact (57) as the movable contact (57) is driven;
A magnet switch comprising a core stationery (50) disposed around an excitation coil (35) and forming a part of a magnetic circuit;
The fixed contact (56) includes a plate-shaped contact portion (56b) having a contact surface (56a) with which the movable contact (57) is separated, and a switch terminal (for connecting the fixed contact (56) to the outside. 54, 55) and a non-contact part (56d) provided in non-contact with other parts between the contact part (56b) and the connection part (56c). ,
The core stationery (50) is in contact with the surface of the contact portion (56b) opposite to the contact surface (56a) via an insulating material (70),
In the fixed contact (56), the contact portion (56b), the non-contact portion (56d), and the connection portion (56c) are formed by bending a metal plate,
A direction in which the contact part (56b), the non-contact part (56d), and the connection part (56c) are continuous is a length direction, and a direction perpendicular to the length direction and perpendicular to the plate thickness direction is a width direction.
The non-contact part (56d) is larger in the width direction than the contact part (56b) and the connection part (56c),
The non-contact part (56d) is provided with a dimple shape in the magnet switch. A movable contact (57) driven in the axial direction by a magnetic force generated by energizing the exciting coil (35);
A pair of fixed contacts (56) which are arranged in opposition to the movable contact (57) in the axial direction, and the movable contact (57) is separated from the movable contact (57) as the movable contact (57) is driven;
A magnet switch comprising a core stationery (50) disposed around an excitation coil (35) and forming a part of a magnetic circuit;
The fixed contact (56) includes a plate-shaped contact portion (56b) having a contact surface (56a) with which the movable contact (57) is separated, and a switch terminal (for connecting the fixed contact (56) to the outside. 54, 55) and a non-contact part (56d) provided in non-contact with other parts between the contact part (56b) and the connection part (56c). ,
The core stationery (50) is in contact with the surface of the contact portion (56b) opposite to the contact surface (56a) via an insulating material (70),
In the fixed contact (56), the contact portion (56b), the non-contact portion (56d), and the connection portion (56c) are formed by bending a metal plate,
A direction in which the contact part (56b), the non-contact part (56d), and the connection part (56c) are continuous is a length direction, and a direction perpendicular to the length direction and perpendicular to the plate thickness direction is a width direction.
The non-contact part (56d) is larger in the width direction than the contact part (56b) and the connection part (56c),
A magnet switch, wherein the non-contact portion (56d) is provided with a rib shape. In the magnet switch according to any one of claims 2 to 6,
The area of the surface on the same side as the contact surface (56a) of the non-contact part (56d) is equal to or larger than the area of the contact surface (56a). In the magnet switch according to any one of claims 1 to 7,
The fixed contact (56) has at least two bent parts (56e, 56f, 56o, 56q, 56s) between the contact part (56b) and the connection part (56c). switch.

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