JP2014015910A - Electromagnetic solenoid apparatus for starter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly disengage a pinion from a ring gear after ignition of an engine by securing smooth movement of an SL1 plunger 36 and an SL2 plunger 47, and to suppress occurrence of arc when a main contact is closed.SOLUTION: A partition member 76 for partitioning a first movable space in which an SL1 plunger 36 can move on an inner periphery of an SL1 coil 35 in an axial direction from a second movable space in which an SL2 plunger 47 can move on an inner periphery of an SL2 coil 46 in an axial direction is arranged between the SL1 plunger 36 and the SL2 plunger 47, and a vent 77 for allowing the first movable space to communicate with the second movable space is opened on a partition bottom part 76a of the partition member 76. Since pressure variation of the first movable space and the second movable space is suppressed when the SL1 plunger 36 and the SL2 plunger 47 are moved, smooth movement of the SL1 plunger 36 and the SL2 plunger 47 can be achieved.

Description

  The present invention is an electromagnetic solenoid for a starter configured by arranging a solenoid SL1 for pushing a pinion toward the ring gear of an engine and a solenoid SL2 for opening and closing a main contact provided in a motor power circuit in series in a common switch frame. Relates to the device.

In recent years, an increasing number of vehicles adopt an idling stop system (hereinafter referred to as ISS) in order to control carbon dioxide emissions and improve fuel efficiency.
The ISS automatically stops the engine by cutting the fuel supply to the engine when the vehicle is temporarily stopped due to a signal stop or traffic jam at an intersection, for example, and then a start operation (for example, a brake pedal by a user) When the restart condition is established by performing a release operation, a shift operation to the drive range, etc.), the starter is automatically activated to restart the engine.

As one of the starting systems suitable for the ISS, an electromagnetic solenoid device including two solenoids called a tandem solenoid type is known.
For example, the electromagnetic solenoid device described in Patent Document 1 includes a solenoid SL1 that drives a shift lever to push a starter pinion toward the ring gear of the engine, and a solenoid SL2 that opens and closes a main contact provided in a motor power circuit. Both solenoids SL1, SL2 are arranged in series in the axial direction and are accommodated in a common switch frame.
Since the operation of the solenoid SL1 and the operation of the solenoid SL2 can be independently controlled by an ECU (electronic control unit), this electromagnetic solenoid device can be suitably used for an ISS starting system.

JP 2009-191843 A

  By the way, the electromagnetic solenoid device described above includes a plunger (referred to as SL1 plunger) movable in the axial direction on the inner periphery of a coil of solenoid SL1 (referred to as SL1 coil) and a coil of solenoid SL2 (referred to as SL2 coil). A plunger (referred to as an SL2 plunger) whose circumference is movable in the axial direction is provided, and a common fixed iron core is disposed between the SL1 plunger and the SL2 plunger. That is, the fixed iron core separates the space in which the SL1 plunger moves on the inner circumference of the SL1 coil and the space in which the SL2 plunger moves on the inner circumference of the SL2 coil.

  According to the above configuration, for example, after the engine is started (specifically, after engine ignition is confirmed), when the operation of the solenoid SL1 is stopped, that is, the excitation of the SL1 coil is stopped, When the suction force is lost and the SL1 plunger is pushed back toward the anti-fixed iron core by the spring force, a negative pressure is temporarily applied between the SL1 plunger and the fixed iron core. In this case, since the movement immediately after the start of the return of the SL1 plunger becomes dull, the pinion cannot be quickly detached from the ring gear after engine ignition. As a result, as the pinion disengagement delays, the rotation speed of the ring gear increases. Therefore, when the pinion disengages from the ring gear, abnormal noise is likely to occur, or the gear may be chipped.

On the other hand, in the solenoid SL2, when the main contact is closed, that is, when the SL2 coil is excited and the fixed iron core is magnetized, and the SL2 plunger is attracted to the fixed iron core, between the SL2 plunger and the fixed iron core. Since the air is compressed and the compressed air is not immediately released, the moving speed of the SL2 plunger is suppressed. For this reason, there is a possibility that the main contact may be closed in a state where the speed of the SL2 plunger is lost. In this case, there is a concern that an excessive arc is generated at the time of contact contact and the contact is welded.
The present invention has been made based on the above circumstances, and its purpose is to ensure the smooth movement of the SL1 plunger and the SL2 plunger so that the pinion can be quickly detached from the ring gear after engine ignition, and An object of the present invention is to provide an electromagnetic solenoid device for a starter that can suppress the generation of an arc when a main contact is closed.

  The present invention according to claim 1 is an electromagnetic solenoid device used in a starter for transmitting the rotational force of a motor to a pinion meshing with an engine ring gear to start the engine, and is excited to form a first electromagnet. 1 coil and a first plunger that is attracted by the first electromagnet and moves in the axial direction on the inner periphery of the first coil, and the pinion is pushed out to the ring gear side by the movement of the first plunger. 1 solenoid, a second coil that is excited to form a second electromagnet, and a second plunger that is attracted by the second electromagnet and moves in the axial direction on the inner periphery of the second coil. By the movement of the second plunger, the second solenoid that closes the main contact provided in the motor power circuit and the first plunger move the inner circumference of the first coil in the axial direction. A first movable space, and a partition member that partitions the second plunger between the second movable space in which the inner periphery of the second coil is movable in the axial direction. The solenoid is disposed on one end side in the axial direction, and the second solenoid is disposed on the other end side in the axial direction, and is accommodated in a common switch frame. In this electromagnetic solenoid device, the partition wall member is formed with a vent hole communicating the first movable space and the second movable space.

  According to the configuration of the first aspect, after the engine is started, when the operation of the first solenoid is stopped, that is, the excitation to the first coil is stopped, the attraction force is lost, and the first solenoid is lost. When the first plunger is pushed back (usually pushed back by the reaction force of the return spring), the pressure fluctuation in the first movable space caused by the movement of the first plunger is suppressed. For example, when the excitation of the first coil is stopped and the first plunger is pushed back, the volume of the first movable space decreases, in other words, in the direction in which the volume of the first movable space decreases. When the first plunger is pushed back, air flows from the first movable space to the second movable space through the vent hole formed in the partition wall member, thereby suppressing an increase in pressure in the first movable space. The

In the opposite case, that is, when the first plunger is pushed back in the direction in which the volume of the first movable space increases, the first movable space passes through the vent hole formed in the partition wall member. As the air flows into the movable space, a decrease in the air pressure in the first movable space is suppressed.
As a result, when the excitation to the first coil is stopped and the first plunger is pushed back, the pressure fluctuation in the first movable space caused by the movement of the first plunger is suppressed. The movement of the plunger immediately after the start of return does not slow down. As a result, the pinion can be quickly detached from the ring gear after the engine is ignited, and an abnormal noise generated when the pinion is detached from the ring gear can be reduced, and the gear can be prevented from being lost.

  On the other hand, when the second solenoid is actuated to close the main contact in the course of starting the engine, that is, when the second plunger is attracted by the second electromagnet and moved, the second plunger The pressure fluctuation in the second movable space caused by the movement of is suppressed. That is, when the volume of the second movable space decreases when the second coil is excited and the second plunger is attracted by the second electromagnet, in other words, the volume of the second movable space decreases. When the second plunger is sucked and moved in the direction in which the second movable space is moved, air flows from the second movable space to the first movable space through the vent hole formed in the partition wall member. The pressure rise is suppressed. Thereby, the moving speed of the second plunger is not suppressed, and smooth movement is possible.

As a result, the main contact is not closed in a state where the speed of the second plunger is lost, and the second plunger can close the main contact with an appropriate speed. Therefore, it is possible to prevent an excessive arc from being generated when the main contact is closed, and to eliminate the concern that the contact is welded.
Moreover, it is also possible to adjust the moving speed of the 2nd plunger at the time of contact contact by setting the hole diameter of the ventilation hole formed in a partition member to an appropriate magnitude | size. That is, if the second plunger has an excessive speed when the main contact is closed, the collision force at the time of contact contact becomes large, and contact bounce may occur. On the other hand, since the moving speed of the second plunger can be adjusted by setting the hole diameter of the vent hole to an appropriate size, contact bounce can be suppressed.

  According to a second aspect of the present invention, there is provided an electromagnetic solenoid device used in a starter that transmits the rotational force of a motor to a pinion that meshes with an engine ring gear to start the engine, and is excited to form a first electromagnet. 1 coil and a first plunger that is attracted by the first electromagnet and moves in the axial direction on the inner periphery of the first coil, and the pinion is pushed out to the ring gear side by the movement of the first plunger. 1 solenoid, a second coil that is excited to form a second electromagnet, and a second plunger that is attracted by the second electromagnet and moves in the axial direction on the inner periphery of the second coil. By the movement of the second plunger, the second solenoid that closes the main contact provided in the motor power circuit and the first plunger move the inner circumference of the first coil in the axial direction. A first movable space, and a partition member that partitions the second plunger between the second movable space in which the inner periphery of the second coil is movable in the axial direction. The solenoid is disposed on one end side in the axial direction, and the second solenoid is disposed on the other end side in the axial direction, and is accommodated in a common switch frame. In this electromagnetic solenoid device, the second plunger is formed with a vent hole that opens the second movable space to the outside of the second plunger.

According to the configuration of the second aspect, when the second solenoid is operated in order to close the main contact in the process of starting the engine, that is, the second electromagnet is formed by exciting the second coil. When the second plunger is attracted to the second electromagnet, the pressure fluctuation in the second movable space caused by the movement of the second plunger is suppressed.
For example, when the volume of the second movable space decreases due to the movement of the second plunger, in other words, when the second plunger moves in the direction in which the volume of the second movable space decreases, the second plunger When the air flows out from the second movable space to the outside of the second plunger through the vent hole formed in, the pressure increase in the second movable space is suppressed.

The outside of the second plunger refers to a space in the switch frame that is formed on the opposite side of the second movable space with respect to the second plunger.
According to this invention, the speed of the second plunger that is attracted and moved by the second electromagnet is not suppressed, and smooth movement is possible. Thereby, the main contact is not closed in a state where the speed of the second plunger is lost, and the second plunger can close the main contact with an appropriate speed. As a result, it is possible to prevent an excessive arc from being generated when the main contact is closed, and to eliminate the concern that the contact is welded.

It is also possible to adjust the moving speed of the second plunger at the time of contact with the contact by setting the diameter of the air hole formed in the second plunger to an appropriate size. That is, if the second plunger has an excessive speed when the main contact is closed, the collision force at the time of contact contact becomes large, and contact bounce may occur.
On the other hand, since the moving speed of the second plunger can be adjusted by setting the hole diameter of the vent hole to an appropriate size, contact bounce can be suppressed. Specifically, the ratio (d / D) between the hole diameter d of the vent hole and the outer diameter D of the second plunger is set so that the condition of the expression (1) described in claim 4 is satisfied. As a result, the second plunger does not stall at the time of contact contact, and it is possible to adjust to an appropriate moving speed without giving an excessive speed that causes contact bounce.

1 is a cross-sectional view of an electromagnetic solenoid device according to a first embodiment. 1 is a cross-sectional view of a deceleration starter according to Embodiment 1. FIG. FIG. 3 is a plan view of the deceleration starter shown in FIG. 2 as viewed from the axial rear side. It is an electric circuit diagram of a starter. It is sectional drawing of the electromagnetic solenoid apparatus which concerns on Example 2. FIG. 7 is a cross-sectional view of an electromagnetic solenoid device according to Embodiment 3. FIG. It is a graph which shows the relationship between d / D and SL2 plunger speed (Example 3). 7 is a cross-sectional view of an electromagnetic solenoid device according to Embodiment 4. FIG. FIG. 10 is a cross-sectional view of an electromagnetic solenoid device according to a fifth embodiment.

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

Example 1
In the first embodiment, an example in which an electromagnetic solenoid device 2 of a tandem solenoid type is adopted for the deceleration type 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. It comprises a clutch 7 for transmission and the electromagnetic solenoid device 2 of the present invention disposed on the same axis as the pinion shaft 5.

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.
1 and 2, the left side in the axial direction including the pinion shaft 5 and the electromagnetic solenoid device 2 is referred to as the front side, and the right side in the drawing is referred to as the rear side, and the pinion shaft 5 moves in the axial direction with respect to the spline tube 15. In the description, the right direction in the figure is defined as the switch direction, and the left direction in the figure is defined as the anti-switch direction.
As shown in FIG. 2, the pinion shaft 5 is perforated at the center of the shaft from the rear end face to the front side, and a steel ball 16 is disposed inside the perforation.

The pinion 6 is supported by direct spline fitting on the outer periphery of the pinion shaft 5 protruding from the front side end face of the spline tube 15, and is splined by a pinion spring 17 disposed between the pinion shaft 5 and the pinion 6. 15 is pressed against the front end face.
The front end of the spline tube 15 is rotatably supported by a starter housing 19 via a ball bearing 18, and the rear end is rotatably supported by a center case 21 via a ball bearing 20. . The center case 21 is disposed adjacent to the rear 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 fixed to the starter housing 19. It is inserted and supported in the formed fitting hole. The clutch gear 25 is attached to the outer periphery of a cylindrical boss portion 26 by spline fitting, and the boss portion 26 is supported on the outer periphery of the spline tube 15 via 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 electromagnetic solenoid device 2 according to the present invention will be described.
The electromagnetic solenoid device 2 uses a first solenoid (hereinafter, referred to as a solenoid SL1) that pushes the pinion shaft 5 in the direction opposite to the switch using the attractive force of the electromagnet, and a main contact (described later) connected to the power circuit of the motor 3. A second solenoid that opens and closes (hereinafter referred to as solenoid SL2).
As shown in FIG. 1, the solenoid SL1 and the solenoid SL2 are arranged in series in the axial direction (left-right direction in the figure) and are integrally housed in a common switch frame described below. The solenoid SL1 is housed on the front side in the switch frame, the solenoid SL2 is housed on the rear side in the switch frame, and the operation direction of the solenoid SL1 and the operation direction of the solenoid SL2 are set in the same direction. Yes.

As shown in FIG. 1, the switch case includes a metal frame 28 mainly covering the outer periphery of the solenoid SL1, a resin frame 29 mainly covering the outer periphery of the solenoid SL2, and a metal closing the rear-side opening end of the resin frame 29. It is comprised with the end frame 30 made from.
The metal frame 28 is provided integrally with the center case 21 and extends from the center case 21 to the rear side in a cylindrical shape. The resin frame 29 has a cylindrical shape in which both ends on the front side and the rear side are opened, and is assembled by sandwiching a rubber gasket 31 between the opening end on the front side and the opening end of the metal frame 28. The end frame 30 is assembled with a rubber gasket 32 sandwiched between the end of the resin frame 29 on the rear side, and ends of a plurality of stud bolts (not shown) that are screwed to the metal frame 28 in advance. The inner nut 33 and the outer nut 34 are fastened and fixed to the portion.

(Description of solenoid SL1)
As shown in FIG. 1, the solenoid SL1 is movable in the axial direction (the left-right direction in the figure) with the SL1 coil 35 that forms an electromagnet (first electromagnet according to the present invention) by energization, and the inner periphery of the SL1 coil 35 The SL1 plunger 36 that is magnetized by an electromagnet and attracts the SL1 plunger 36, the annular core plate 38 that is disposed on the front side of the SL1 coil 35, and the movement of the SL1 plunger 36 in the steel ball 16. The shaft 39 that transmits to the pinion shaft 5 via (see FIG. 2), the return spring 40 that pushes back the SL1 plunger 36 when the attractive force of the electromagnet decreases, and the pinion 6 is pushed into the engine ring gear G (see FIG. 4). The drive spring 41 etc. which store the reaction force for this is provided.

The SL1 coil 35 is configured, for example, by winding an insulation-coated copper wire around a resin bobbin 42. A cylindrical sleeve 43 made of nonmagnetic metal (for example, stainless steel) for guiding the movement of the SL1 plunger 36 is inserted into the inner periphery of the bobbin 42.
The SL1 plunger 36 is provided in a stepped shape having a step on the radial outer peripheral surface, and a hollow hole 44 penetrating the central portion in the radial direction in the longitudinal direction (left-right direction in FIG. 1) is formed. A small-diameter hole portion 44a having a small hole diameter is provided on the front side.
The SL1 fixed iron core 37 is provided in an annular shape whose central portion in the radial direction opens in a cylindrical shape, is inserted into the inner periphery of the front side end portion of the cylindrical sleeve 43, and is disposed so as to face the SL1 plunger 36 in the axial direction. Is done.

The core plate 38 is caulked and fixed to the SL1 fixed iron core 37 and is magnetically coupled. As shown in FIG. 2, the core plate 38 abuts against the axial end surface of the center case 21 forming the bottom surface of the metal frame 28, and the axial front side. Movement is restricted and rotation is restricted in the circumferential direction.
The shaft 39 is assembled to the SL1 plunger 36 through the small diameter hole 44a of the SL1 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 of the shaft 39 that enters the rear side of the hollow hole 44 from the small diameter hole portion 44a. Further, the front side of the shaft 39 protruding from the hollow hole 44 passes through the inner periphery of the SL1 fixed iron core 37, is inserted into a perforation formed in the rear side end surface of the pinion shaft 5, and abuts against the steel ball 16. (See FIG. 2).

The return spring 40 is disposed on the outer periphery of the shaft 39 protruding from the small-diameter hole portion 44a of the SL1 plunger 36, the front-side end portion is in contact with and supported by the steel ball 16, and the rear-side end portion is the small-diameter hole portion. 44a is supported in contact with the outer peripheral edge of 44a.
As shown in FIG. 1, the drive spring 41 is disposed inside a hollow hole 44 formed on the rear side from the small-diameter hole portion 44a, and the end portion on the rear side abuts against the end plate 45 and is supported. The side end is in contact with and supported by the flange 39 a of the shaft 39.
The end plate 45 is fixed to the rear side end surface of the SL1 plunger 36 by welding or bonding, and as shown in FIG. 1, a round hole 45a is opened at the radial center.

(Description of solenoid SL2)
As shown in FIG. 1, the solenoid SL2 has an SL2 coil 46 that forms an electromagnet (second electromagnet according to the present invention) by energization, and the inner periphery of the SL2 coil 46 is movable in the axial direction (the left-right direction in the drawing). SL2 plunger 47 that is magnetized by an electromagnet, SL2 fixed iron core 48 that adsorbs SL2 plunger 47, an annular magnetic plate 49 that is disposed on the front side of SL2 coil 46, and SL2 when the attractive force of the electromagnet decreases. A return spring 50 or the like that pushes back the plunger 47 is provided.

The SL2 coil 46 is configured by, for example, winding a copper wire coated with insulation around a bobbin 51 made of resin. A cylindrical sleeve 52 made of a non-magnetic metal (for example, stainless steel) that guides the movement of the SL2 plunger 47 is inserted in the inner periphery of the bobbin 51.
As shown in FIG. 1, the SL2 plunger 47 is provided in a stepped shape having a step on the radial outer peripheral surface, and is formed with a cylindrical hole 47a that opens to the front end surface.
The SL2 fixed iron core 48 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 on the front side of the cylindrical sleeve 52, and is disposed opposite to the SL2 plunger 47 in the axial direction.

For example, the magnetic plate 49 is formed by laminating a plurality of steel plates punched in an annular shape by a press, and is mechanically and magnetically connected to the SL2 fixed iron core 48.
As shown in FIG. 1, the magnetic plate 49 and the core plate 38 of the solenoid SL1 are magnetically connected via a core stationery 53 that forms a common magnetic path for the solenoid SL1 and the solenoid SL2.
As shown in FIG. 1, the return spring 50 is inserted into the inner periphery of a cylindrical hole 47a formed in the SL2 plunger 47, and the front end is supported by a stepped portion 76e of a partition wall member 76 to be described later. The end on the side is supported by the bottom surface (axial end surface) of the cylindrical hole 47a of the SL2 plunger 47.

  The main contacts opened and closed by the solenoid SL2 are, as shown in FIG. 4, a set of fixed contacts 56 connected to the power supply circuit of the motor 3 via two terminal bolts 54 and 55 (described below). The movable contact 57 is electrically connected between the set of fixed contacts 56, and the movable contact 57 contacts the set of fixed contacts 56. The main contact is closed (turned on) by conducting, and the movable contact 57 is separated from the set of fixed contacts 56 and the fixed contact 56 is electrically cut off to open (turn off) the main contact. .

The two terminal bolts 54 and 55 are a B terminal bolt 54 and an M terminal bolt 55 each having a male thread portion formed on the outer periphery. As shown in FIG. The terminal of the battery cable 58 to be connected is connected, and the terminal of the motor lead wire 59 connected to the plus side 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 29. The washer 61 is sandwiched between them, and the nut 62 is fastened to the male screw portion to fix the washer.

A connector housing 29a (see FIG. 3) in which two energization terminals 63 and 64 (see FIG. 4) to which the SL1 coil 35 and the SL2 coil 46 are connected is insert-molded is integrally molded with the resin frame 29. Has been.
As shown in FIG. 4, power supply lines 65 and 66 for supplying power from the battery B to the SL1 coil 35 and the SL2 coil 46 are connected to the two energizing terminals 63 and 64 taken out to the connector housing 29a. Connected. SL1 relay 67 and SL2 relay 68 are connected to power supply lines 65 and 66, respectively, and the on / off operation of SL1 relay 67 and SL2 relay 68 is electronically controlled by ECU 69.
The two energizing terminals 63 and 64 have diodes 70 and 71 for short-circuiting the back electromotive force generated in the SL1 coil 35 and the SL2 coil 46 when the SL1 relay 67 and the SL2 relay 68 are turned off. The SL1 coil 35 and the SL2 coil 46 are respectively connected in parallel.

The set of fixed contacts 56 is provided separately from the B terminal bolt 54 and the M terminal bolt 55, respectively. For example, the lower part of the neck of the B terminal bolt 54 and the M terminal bolt 55 is formed in a circular hole formed in the fixed contact 56. Is fixed by press-fitting. It is also possible to form serrations at the lower necks of the B terminal bolt 54 and the M terminal bolt 55 and press the neck lower part where the serrations are formed into the circular hole of the fixed contact 56 to be fixed.
1 and FIG. 2 show a state in which the B terminal bolt 54 is taken out to the lower side of the resin frame 29, but in reality, the B terminal bolt 54 and the M terminal bolt 55 are shown in FIG. Are taken out from the left and right sides of the resin frame 29 in the figure. That is, the electromagnetic solenoid device 2 shown in FIGS. 1 and 2 shows a cross-sectional shape along the line II-O-II shown in FIG.

As shown in FIG. 1, the movable contact 57 is sandwiched between a resin insulating plate 72 and an insulating bush 73 and is held by the SL2 plunger 47 and applies a contact pressure when the main contact is closed. The contact pressure spring 74 is biased. The contact pressure spring 74 has one end on the front side supported by the insulating bush 73 and the other end on the rear side supported by a flange plate 75 fixed to the rear end surface of the SL2 plunger 47 by welding or bonding. .
The return position of the SL2 plunger 47, that is, the position where the SL2 plunger 47 is pushed back by the reaction force of the return spring 50 and stopped when the excitation to the SL2 coil 46 is stopped and the attractive force of the electromagnet is lost, As shown in FIG. 1, the tapered surface formed on the insulating bush 73 is regulated by coming into contact with the tapered surface provided on the end cover 30.

Next, features of the electromagnetic solenoid device 2 according to the present invention will be described.
First, the shapes of the SL1 plunger 36 and the SL2 plunger 47 will be described.
When the axial end surface formed by the step on the outer peripheral surface is called a step surface, the SL1 plunger 36 has a larger outer diameter on the front side and smaller outer diameter on the rear side than the step surface. Hereinafter, the front side of the step surface of the SL1 plunger 36 is referred to as a plunger sliding portion 36a, and the rear side is referred to as a plunger rear end portion 36b (see FIG. 1).
The SL2 plunger 47 is formed such that the inner diameter of the cylindrical hole 47a opened at the front end surface is larger than the outer diameter of the plunger rear end portion 36b.

  The SL1 plunger 36 and the SL2 plunger 47 are stationary when the SL1 coil 35 and the SL2 coil 46 are not excited, that is, the SL1 plunger 36 and the SL2 plunger 47 are pushed by the return springs 40 and 50, respectively. The rear end portion 36b of the plunger enters the inner periphery of the cylindrical hole 47a formed in the SL2 plunger 47 and forms a state of being wrapped in the axial direction. The return position of the SL1 plunger 36 is regulated by the stepped surface of the SL1 plunger 36 coming into contact with a stepped portion 76e provided on the partition wall member 76, as shown in FIG. On the other hand, the return position of the SL2 plunger 47 is regulated by the tapered surface of the insulating bush 73 assembled to the SL2 plunger 47 coming into contact with the tapered surface of the end cover 30 as described above.

Between the SL1 plunger 36 and the SL2 plunger 47, a first movable space in which the SL1 plunger 36 is movable in the axial direction on the inner periphery of the SL1 coil 35, and an SL2 plunger 47 in the axial direction on the inner periphery of the SL2 coil 46. The partition member 76 that partitions the movable second movable space is disposed.
The partition member 76 is press-molded into a cup shape from a nonmagnetic metal plate (for example, a stainless steel plate). Specifically, as shown in FIG. 1, a partition cylinder portion (described below) that covers the outer circumference of the SL1 plunger 36 protruding from the SL1 coil 35 toward the rear side, and a bottom surface (axial direction) of the partition cylinder portion Partition wall bottom portion 76a that forms an end surface of the partition wall, and a partition flange portion 76b that extends radially outward from the front side end portion of the partition tube portion.

As shown in FIG. 1, the bulkhead cylinder part is formed with a large-diameter cylinder part 76c covering the outer periphery of the plunger sliding part 36a and a small-diameter cylinder part 76d covering the outer periphery of the plunger rear end part 36b. The stepped portion 76e is provided between the 76c and the small diameter cylindrical portion 76d.
The partition wall bottom portion 76a has a vent hole 77 communicating with the first movable space and the second movable space at the radial center. The inner diameter of the vent hole 77 is the same as the inner diameter of the round hole 45a formed in the end plate 45 or slightly smaller than the inner diameter of the round hole 45a.
For example, the partition member 76 presses the outer periphery of the large-diameter cylindrical portion 76c into the inner periphery of the SL2 fixed iron core 48, and fixes the partition flange portion 76b between the bobbin 42 of the SL1 coil 35 and the magnetic plate 49. Is done.

Next, the operation of the deceleration type starter 1 will be described.
Here, as an example of the case where idling stop is performed, an operation when a restart request is generated in the engine stop process (during a deceleration period until the engine rotation completely stops) will be described.
The ECU 69 shown in FIG. 4 is an electronic control device for idling stop that is operated by turning on the start switch 78. When a restart request is generated during the engine stop process, the solenoid 69 is connected via the SL1 relay 67 and the SL2 relay 68. The operation of SL1 and the operation of solenoid SL2 can be controlled independently.

  When the SL1 relay 67 is turned on by the ECU 69, the solenoid SL1 is supplied with electric power from the battery B to the energization terminal 63, and the SL1 coil 35 connected to the energization terminal 63 is excited to form an electromagnet. . As a result, the SL1 plunger 36 is attracted to the magnetized SL1 fixed iron core 37 and moved to the front side in the axial direction, and the steel ball 16 is pushed through the shaft 39 as the SL1 plunger 36 moves, whereby the pinion shaft 5 is pushed out to the ring gear side (left direction in FIG. 2) of the engine. After the side surface of the pinion 6 supported by the pinion shaft 5 comes into contact with the side surface of the ring gear G, when the ring gear G being decelerated rotates to a position where it can mesh with the pinion 6, the reaction force stored in the drive spring 41 causes the pinion 6 is pushed out and meshed with the ring gear G.

  When the SL2 relay 68 is ON-controlled by the ECU 69, the solenoid SL2 is supplied with electric power from the battery B to the energizing terminal 64, and the SL2 coil 46 connected to the energizing terminal 64 is excited to form an electromagnet. . As a result, the SL2 plunger 47 is attracted to the magnetized SL2 fixed iron core 48 and moves to the front side in the axial direction. The movement of the SL2 plunger 47 causes the movable contact 57 to contact the set of fixed contacts 56 and is urged by the contact pressure spring 74, thereby closing the main contact. As a result, electric power is supplied from the battery B to the motor 3 to generate a rotational force in the armature 9, and the rotational force of the armature 9 is amplified by the reduction gear and transmitted to the pinion shaft 5. At this time, since the pinion 6 is already meshed with the ring gear G, the rotational force of the motor 3 amplified by the reduction gear is transmitted from the pinion 6 to the ring gear G, and the engine is quickly cranked.

(Operation and Effect of Example 1)
In the electromagnetic solenoid device 2 according to the first embodiment, when the operation of the solenoid SL1 is stopped after the engine is started, that is, the excitation to the SL1 coil 35 is stopped, and the SL1 plunger 36 is made to react to the return spring 40. When pushed back by force, it is possible to suppress pressure fluctuations in the first movable space (in this case, the space formed between the partition wall member 76 and the SL1 plunger 36) caused by the movement of the SL1 plunger 36. That is, when the SL1 plunger 36 is pushed back, air flows from the first movable space to the second movable space through the vent hole 77 formed in the partition wall bottom 76a, thereby increasing the pressure in the first movable space. Is suppressed. As a result, when the SL1 plunger 36 is pushed back by the reaction force of the return spring 40, the movement immediately after the start of the return of the SL1 plunger 36 is not delayed, and can return smoothly. As a result, since the pinion 6 can be quickly detached from the ring gear G after the engine is ignited, the noise generated when the pinion 6 is detached from the ring gear G can be reduced, and the lack of gear can be prevented.

  Further, when the solenoid SL2 is actuated to close the main contact in the course of starting the engine, that is, when the SL2 plunger 47 is attracted and moved by the magnetized SL2 fixed iron core 48, the SL2 plunger 47 Pressure fluctuations in the second movable space (in this case, the space formed between the partition wall member 76 and the SL2 plunger 47) caused by the movement are suppressed. That is, when the volume of the second movable space decreases due to the movement of the SL2 plunger 47, air flows from the second movable space to the first movable space through the vent hole 77 formed in the partition wall bottom portion 76a. The increase in pressure in the movable space 2 is suppressed. Thereby, the moving speed of the SL2 plunger 47 is not suppressed, and a smooth movement is possible.

As a result, the main contact is not closed when the speed of the SL2 plunger 47 is lost, and the SL2 plunger 47 can close the main contact with an appropriate speed. Therefore, since it can prevent that an excessive arc generate | occur | produces at the time of closing of a main contact, the concern that a contact welds can be wiped out. “The main contact closes when the speed of the SL2 plunger 47 is lost” means that the speed of the SL2 plunger 47 is substantially zero when the movable contact 57 contacts the set of fixed contacts 56. Say the state.
However, if the SL2 plunger 47 has an excessive speed when the main contact is closed, the collision force at the time of contact contact may increase, and contact bounce may occur.

When contact bounce occurs, wear due to contact collision or welding between contacts due to generation of an arc may be caused, resulting in shortening of the contact life. Further, when the return (bounce) of the SL2 plunger 47 due to the contact bounce increases, the insulating bush 73 attached to the SL2 plunger 47 collides with the metal end cover 30 to generate a collision sound.
On the other hand, by setting the diameter of the vent hole 77 formed in the partition wall bottom portion 76a to an appropriate size, it becomes possible to adjust the moving speed of the SL2 plunger 47 at the time of contact contact, and occurrence of contact bounce. And the collision of the insulating bush 73 with the end cover 30 can be avoided, or the collision noise can be reduced.

Subsequently, other examples (Examples 2 to 5) according to the present invention will be described.
In the following second to fifth embodiments, parts having the same names or parts having the same functions as those in the first embodiment are denoted by the same reference numerals.
(Example 2)
As shown in FIG. 5, the second embodiment is an example in which a hole diameter adjusting valve 79 is attached to a vent hole (number is omitted) formed in the partition wall bottom 76a.
The hole diameter adjusting valve 79 includes a rubber valve body 79a having a valve opening at a central portion in the radial direction, and a metal ring 79b insert-molded around the valve opening. The metal ring 79b is formed of a reversible shape memory alloy whose entire length expands and contracts due to a temperature change. Therefore, in the hole diameter adjusting valve 79, when the ambient temperature rises, the entire length of the metal ring 79b expands and the opening area of the valve opening increases, and when the ambient temperature decreases to room temperature, the entire length of the metal ring 79b contracts. The opening area of the valve opening can be restored to the initial size.

In the electromagnetic solenoid device 2 mounted in the engine room of the vehicle, the ambient temperature changes greatly, so that the air pressure in the first movable space and the second movable space partitioned by the partition member 76 also changes. . Further, since the resistance values of the SL1 coil 35 and the SL2 coil 46 increase or decrease according to the temperature change, the attractive force of the solenoid SL1 and the solenoid SL2 also changes. For example, when the temperature rises, the resistance value increases, and the value of the current flowing through the SL1 coil 35 and SL2 coil 46 decreases, so that the attractive force decreases.
On the other hand, by attaching the hole diameter adjusting valve 79 to the vent hole formed in the partition wall bottom portion 76a, the valve diameter of the hole diameter adjusting valve 79 can be increased or decreased in accordance with the change in the ambient temperature. Even when it changes, the smooth operation of the SL1 plunger 36 and the SL2 plunger 47 can be ensured.

(Example 3)
The third embodiment is an example in which the vent 80 is formed in the SL2 plunger 47 described in the first embodiment. As shown in FIG. 6, the vent 80 is formed so as to penetrate the central portion in the radial direction of the SL2 plunger 47 in the axial direction. Specifically, one end on the front side opens into the bottom surface of a cylindrical hole 47a formed in the SL2 plunger 47, and the other end on the rear side opens in a drilling hole 47b recessed in the rear side of the SL2 plunger 47. It is open. The flange plate 75 fixed to the rear side end surface of the SL2 plunger 47 is formed with a communication hole 75a that communicates with the drilling hole 47b. Therefore, the second movable space in which the SL2 plunger 47 is movable communicates with the outer space of the SL2 plunger 47 through the vent 80, the drilling hole 47b, and the communication hole 75a.
The partition member 76 used in the electromagnetic solenoid device 2 of the third embodiment is not formed with the air holes 77 (see FIG. 1) described in the first embodiment.

Here, as shown in FIG. 6, when the outer diameter of the SL2 plunger 47 is D and the hole diameter of the vent 80 is d, the condition of the following expression (1) is satisfied. The hole diameter of the communication hole 75 a formed in the flange plate 75 is the same as the hole diameter d of the vent hole 80 formed in the SL2 plunger 47 or larger than the hole diameter d of the vent hole 80.
0.03 ≦ d / D ≦ 0.08 …………………………………… (1)
The above equation (1) is set based on the test result of investigating the occurrence frequency of the bounce that occurs at the time of contact with d / D as a parameter. The test results are shown in the following table (1).
In the test results of Table (1), a case where the bounce occurrence frequency is 50% or more is indicated by a cross, and a case where the bounce occurrence frequency is less than 50% is indicated by a circle.

In the above investigation, when d / D ≦ 0.02 and d / D ≧ 0.09, the bounce occurrence frequency is 50% or more (x mark), and 0.03 ≦ d / D ≦ 0. In the case of 08, the result that the bounce occurrence frequency was less than 50% (circle mark) was obtained.
Therefore, according to the configuration of the third embodiment that satisfies the condition of the above formula (1), when the SL2 plunger 47 is attracted and moved by the magnetized SL2 fixed iron core 48, as shown in FIG. Can be adjusted to an appropriate moving speed (speed corresponding to a range of 0.03 ≦ d / D ≦ 0.08). That is, the SL2 plunger 47 does not stall at the time of contact contact, and it is possible to adjust the movement speed to an appropriate level without giving an excessive speed that causes contact bounce.

As a result, an excessive arc is not generated at the time of contact, and the occurrence of contact bounce can be suppressed. Further, as an effect of suppressing contact bounce, not only can the contact life be shortened due to contact wear or welding due to collision, but also the return (bounce) of the SL2 plunger 47 due to contact bounce can be suppressed. It is possible to avoid the insulation bush 73 attached to the metal from colliding with the metal end cover 30 or to reduce the collision sound generated by the collision.
With respect to the configuration of the third embodiment, the hole diameter adjusting valve 79 (see FIG. 5) described in the second embodiment can be attached to the SL2 plunger 47. However, it is assumed that the valve opening of the hole diameter adjusting valve 79 is variable within a range where the condition of the expression (1) is satisfied.

Example 4
The electromagnetic solenoid device 2 shown in the fourth embodiment is mounted on a starter (a general view of the starter is omitted) that pushes the pinion 6 toward the ring gear side of the engine via a shift lever (not shown).
As shown in FIG. 8, in the solenoid SL1 that pushes out the pinion 6, the moving direction of the SL1 plunger 36 that is attracted by the electromagnet and moved is set to be opposite to the moving direction of the SL2 plunger 47. Specifically, a common fixed iron core 81 is provided between the SL1 plunger 36 and the SL2 plunger 47. When the fixed iron core 81 is magnetized by exciting the SL1 coil 35, the SL1 plunger is compressed while the return spring 40 is compressed. 36 moves to the right in the figure. On the other hand, in the solenoid SL2 that opens and closes the main contact, when the SL2 coil 46 is excited and the fixed iron core 81 is magnetized, the SL2 plunger 47 moves to the left in the drawing while the return spring 50 is compressed.

  The electromagnetic solenoid device 2 includes a first movable space in which the SL1 plunger 36 is movable in the axial direction on the inner periphery of the SL1 coil 35, and a second movable in which the SL2 plunger 47 is movable in the axial direction on the inner periphery of the SL2 coil 46. The space is partitioned by a fixed iron core 81. That is, the fixed iron core 81 forms the partition member of the present invention, and the fixed iron core 81 is formed with a vent hole 77 that communicates the first movable space and the second movable space. Thus, when the operation of the solenoid SL1 is stopped after the engine is started, that is, when the excitation to the SL1 coil 35 is stopped and the SL1 plunger 36 is pushed back by the reaction force of the return spring 40, The first movable space (here, the space formed between the fixed iron core 81 and the SL2 plunger 47 on the inner periphery of the SL2 coil 46) passes through the vent hole 77 formed in the fixed iron core 81. Since air flows into the space (here, the space formed between the fixed iron core 81 and the SL1 plunger 36 on the inner periphery of the SL1 coil 35), the first movable space is temporarily in a negative pressure state. You can avoid that.

As a result, the movement of the SL1 plunger 36 immediately after the start of return does not become slow, and the return can start smoothly. Therefore, since the pinion 6 can be quickly detached from the ring gear G after the engine is ignited, the noise generated when the pinion 6 is detached from the ring gear G can be reduced, and the gear can be prevented from being chipped.
Further, when the solenoid SL2 is actuated, that is, when the solenoid SL2 is actuated to close the main contact, the same effect as that of the first embodiment can be obtained. Specifically, when the SL2 plunger 47 is attracted and moved by the magnetized fixed iron core 81, air passes from the second movable space to the first movable space through the vent hole 77 formed in the fixed iron core 81. The pressure rise in the second movable space is suppressed by flowing.

As a result, the moving speed of the SL2 plunger 47 is not suppressed, and a smooth movement is possible. Thereby, the main contact is not closed in a state where the speed of the SL2 plunger 47 is lost, and the SL2 plunger 47 can close the main contact with an appropriate speed. Therefore, since it can prevent that an excessive arc generate | occur | produces at the time of closing of a main contact, the concern that a contact welds can be wiped out.
Similarly to the first embodiment, by setting the hole diameter of the air hole 77 formed in the fixed iron core 81 to an appropriate size, it is possible to adjust the moving speed of the SL2 plunger 47 when contacting the contact. Yes, and it can be expected to have the effect of suppressing contact bounce.

(Example 5)
As in the fourth embodiment, the fifth embodiment relates to the electromagnetic solenoid device 2 having the common fixed iron core 81 between the SL1 plunger 36 and the SL2 plunger 47, and the vent hole is connected to the SL2 plunger 47 as in the third embodiment. This is an example in which 80 is formed. Note that the fixed iron core 81 is not formed with the air holes 77 (see FIG. 8) described in the fourth embodiment.
As shown in FIG. 9, the SL2 plunger 47 used in the electromagnetic solenoid device 2 according to the fifth embodiment has a plunger rod 82 attached to the central portion in the radial direction on the rear side, and the movable contact 57 is a contact pressure spring 74. And is pressed against the end face of the plunger rod 82. For this reason, since the vent 80 cannot be pierced through the central portion in the radial direction of the SL2 plunger 47, the vent 80 is formed at a position avoiding the plunger rod 82.

Also in the electromagnetic solenoid device 2 shown in the fifth embodiment, when the condition of the expression (1) described in the third embodiment is satisfied, when the SL2 plunger 47 moves by being attracted by the electromagnet, an appropriate moving speed ( (Speed corresponding to the range of 0.03 ≦ d / D ≦ 0.08 shown in FIG. 7). That is, the SL2 plunger 47 does not stall at the time of contact contact, and it is possible to adjust the movement speed to an appropriate level without giving an excessive speed that causes contact bounce. Therefore, the same effect as in the third embodiment can be obtained.
Further, with respect to the configuration of the fifth embodiment, the hole diameter adjusting valve 79 (see FIG. 5) described in the second embodiment can be attached to the SL2 plunger 47. However, the valve opening of the hole diameter adjusting valve 79 is assumed to be variable within a range where the condition of the expression (1) described in the third embodiment is satisfied.

1 starter 2 electromagnetic solenoid device 3 motor 6 pinion 35 SL1 coil (first coil)
36 SL1 plunger (first plunger)
37 SL1 fixed iron core (first fixed iron core)
40 Return spring (first return spring)
46 SL2 coil (second coil)
47 SL2 plunger (second plunger)
48 SL2 fixed iron core (second fixed iron core)
50 Return spring (second return spring)
76 Bulkhead member 77 Ventilation hole 79 Hole diameter adjustment valve 80 Ventilation hole 81 Fixed iron core (partition wall member)
SL1 first solenoid SL2 second solenoid

Claims (8)

Used in the starter (1) for starting the engine by transmitting the rotational force of the motor (3) to the pinion (6) meshing with the ring gear of the engine;
A first coil (35) that is excited to form a first electromagnet, and a first plunger that is attracted by the first electromagnet and moves in the axial direction on the inner circumference of the first coil (35). 36), and a first solenoid (SL1) that pushes the pinion (6) toward the ring gear by the movement of the first plunger (36);
A second coil (46) that is excited to form a second electromagnet, and a second plunger that is attracted by the second electromagnet and moves in the axial direction on the inner periphery of the second coil (46). 47), and a second solenoid (SL2) that closes a main contact provided in the power supply circuit of the motor (3) by the movement of the second plunger (47),
A first movable space in which the first plunger (36) is movable in the axial direction on the inner periphery of the first coil (35), and the second plunger (47) is the second coil (46). A partition member (76) that partitions the inner periphery of the second movable space that is movable in the axial direction,
The first solenoid (SL1) is disposed on one end side in the axial direction and the second solenoid (SL2) is disposed on the other end side in the axial direction with respect to the partition member (76), and is accommodated in a common switch frame. An electromagnetic solenoid device (2),
The starter electromagnetic solenoid device, wherein the partition member (76) is formed with a vent hole (77) for communicating the first movable space and the second movable space. Used in the starter (1) for starting the engine by transmitting the rotational force of the motor (3) to the pinion (6) meshing with the ring gear of the engine;
A first coil (35) that is excited to form a first electromagnet, and a first plunger that is attracted by the first electromagnet and moves in the axial direction on the inner circumference of the first coil (35). 36), and a first solenoid (SL1) that pushes the pinion (6) toward the ring gear by the movement of the first plunger (36);
A second coil (46) that is excited to form a second electromagnet, and a second plunger that is attracted by the second electromagnet and moves in the axial direction on the inner periphery of the second coil (46). 47), and a second solenoid (SL2) that closes a main contact provided in the power supply circuit of the motor (3) by the movement of the second plunger (47),
A first movable space in which the first plunger (36) is movable in the axial direction on the inner periphery of the first coil (35), and the second plunger (47) is the second coil (46). A partition member (76) that partitions the inner periphery of the second movable space that is movable in the axial direction,
The first solenoid (SL1) is disposed on one end side in the axial direction and the second solenoid (SL2) is disposed on the other end side in the axial direction with respect to the partition member (76), and is accommodated in a common switch frame. An electromagnetic solenoid device (2),
The second plunger (47) is formed with a vent (80) that opens the second movable space to the outside of the second plunger (47). apparatus. The starter electromagnetic solenoid device (2) according to claim 1,
An electromagnetic solenoid device for a starter, wherein a hole diameter adjusting valve (79) that varies the hole diameter of the vent hole (77) according to the ambient temperature is attached to the partition member (76). The starter electromagnetic solenoid device (2) according to claim 2,
When the outer diameter of the second plunger (47) is D and the hole diameter of the vent (80) is d,
0.03 ≦ d / D ≦ 0.08 …………………………………… (1)
An electromagnetic solenoid device for a starter characterized in that the condition of the formula (1) is satisfied. The starter electromagnetic solenoid device (2) according to claim 4,
The second plunger (47) is provided with a hole diameter adjusting valve (79) that varies the hole diameter of the vent hole (80) within a range where the condition of the expression (1) is satisfied according to the ambient temperature. An electromagnetic solenoid device for a starter.   The electromagnetic solenoid device (2) for starter according to any one of claims 1 to 5, wherein the first solenoid (SL1) and the second solenoid (SL2) are attracted by the first electromagnet. The moving direction of the moving first plunger (36) and the moving direction of the second plunger (47) moving by being attracted by the second electromagnet are set in the same direction. Electromagnetic solenoid device for starter.   The electromagnetic solenoid device (2) for starter according to any one of claims 1 to 5, wherein the first solenoid (SL1) and the second solenoid (SL2) are attracted by the first electromagnet. The moving direction of the moving first plunger (36) and the moving direction of the second plunger (47) moving by being attracted by the second electromagnet are set in opposite directions. Electromagnetic solenoid device for starter. The starter electromagnetic solenoid device (2) according to claim 1 or 3,
The first solenoid (SL1) and the second solenoid (SL2) are attracted to the moving direction of the first plunger (36) moving by being attracted by the first electromagnet, and to the second electromagnet. The moving direction of the second plunger (47) that is moved is set in the opposite direction, and the partition member is interposed between the first plunger (36) and the second plunger (47). An electromagnetic solenoid device for a starter having a common fixed iron core (81) to be formed, and the vent hole (77) formed in the fixed iron core (81).

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