JP2005110385A - Electromagnetic actuator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the downsizing, the cost reduction, etc. of an electromagnetic actuator. <P>SOLUTION: In this electromagnetic actuator which includes a fixed iron core 101, a coil 103 for excitation wound on the fixed iron core, a movable coil 11 which can move in a specified axial direction S, being attracted by the fixed iron core by the current application to the coil, a return spring 113 which energizes the movable iron core in a direction of detaching the movable iron core from the fixed iron core, and a holder 104, a case 109, etc. which retain the fixed iron core and house the movable iron core shiftably, the fixed iron core 101 has a pair of feet 101a and 101b which extend in a specified axial direction S, and the coil 103 is wound into longitudinal winding in a specified axial direction S within the paired feet 101a and 101b. Hereby, the height dimensions of the fixed iron core can be made small, whereby the electromagnetic actuator can be downsized. Moreover, there is no necessity to wind and form only the coil in advance, so the manhour in assembly can be curtailed, and the assembly work can be facilitated, and the cost can be reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electromagnetic actuator that generates a linear driving force by an electromagnetic force generated by energization of a coil, and more particularly, to an electromagnetic valve unit that forms part of a gas extinguishing safety device such as a gas stove or a gas water heater. The present invention relates to an electromagnetic actuator.

  As a conventional gas extinguishing safety device used for a gas stove or the like, for example, as shown in FIG. 9, a pair of solenoid valve unit 1 including a valve body 1a that opens and closes a passage of a gas supply pipe, and a pair connected to a heat sensitive part at the tip. There is known one that is integrally provided with a thermocouple unit 2 having cables 2a and 2b (see, for example, Patent Document 1).

  As shown in FIGS. 9 and 10, the electromagnetic valve unit 1 of this apparatus integrally has a fixed iron core 1b, an exciting coil 1c wound around the fixed iron core 1b, and a valve body 1a in a predetermined axial direction S. A movable core 1d that is movable, a return spring 1e that urges the movable core 1d away from the fixed core 1b, a holder 1f that holds the fixed core 1b, a pair of terminals 1g and 1h connected to both ends of the coil 1c, and the like. Including an electromagnetic actuator. As shown in FIG. 10B, the terminal 1g is held by the holder 1f via a resin packing 1j formed in a substantially cylindrical shape.

In addition, as an electromagnet including an iron core and a coil, a coil in which a coil wound in advance around each leg portion is attached to an E-type or U-type iron core is known (for example, Patent Documents). 2, see Patent Document 3).
JP 2000-18591 A JP-A-9-270319 Japanese Patent Laid-Open No. 6-96971

  By the way, in the conventional electromagnetic actuator, as shown in FIG. 9 and FIG. 10, the coil 1c is respectively wound horizontally (horizontal winding) on the two legs of the fixed iron core 1b. Since the distance between the two leg portions is narrow, it is difficult to wind a coil directly on these leg portions. Therefore, as with the conventional electromagnet, the assembly is performed by inserting the coil 1c wound in advance into the leg portion, and a process of winding only the coil in advance is necessary, which complicates the assembly process. I was invited.

  Moreover, in order to make the coil 1c into a horizontal winding, when the number of turns, the wire diameter, etc. are taken into consideration, it is necessary to lengthen the dimension of the fixed core 1b in the axial direction (predetermined axial direction S). In order to secure a cross-sectional area that does not restrict the magnetic circuit while providing the coil insertion hole 1b ′ for guiding the coil 1b downward, it is necessary to increase the height of the base portion of the fixed iron core 1b. On the other hand, in order to generate a desired electromagnetic force only by flowing a small current through the coil 1c, the fixed core 1b is formed of an expensive alloy material such as permalloy (trade name). The cost was increased.

Further, as shown in FIG. 10 (b), the fixed iron core 1b is directly fixed to the holder 1f by caulking 1f ', so that the adsorbing surface (movable iron core) of the fixed iron core 1b is affected by the direct caulking. The surface) is inclined to lower the flatness, and there is a risk of deteriorating magnetic properties due to pressurization. On the other hand, in order to avoid such deterioration of flatness, deterioration of magnetic characteristics, etc., there is a problem that if the caulking is carried out with a slight backlash, the fixed iron core 1b will rattle and the movable iron core cannot be attracted. .
Further, as shown in FIG. 10B, when the packing 1j is inserted, there is a problem that the insertion cannot be easily performed and burrs or the like occur.

  The present invention has been made in view of the above-described conventional circumstances, and its object is to reduce the size, reduce the cost, reduce the number of assembling steps (setup), facilitate the assembling work, and the like. On the other hand, it is an object of the present invention to provide an electromagnetic actuator suitable for being applied as a drive source for driving a valve body such as a gas extinguishing safety device.

The electromagnetic actuator of the present invention includes a fixed iron core, an exciting coil wound around the fixed iron core, a movable iron core that is attracted to the fixed iron core by energizing the coil and is movable in a predetermined axial direction, and the movable iron core is separated from the fixed iron core. An electromagnetic actuator including a return spring biasing in a direction and a body that holds the fixed iron core and movably accommodates the movable iron core, the fixed iron core having a pair of legs extending in a predetermined axial direction The coil is configured to be wound in a predetermined axial direction within the pair of leg portions.
According to this configuration, an electromagnetic force is generated by energizing the coil, and the movable iron core is attracted and moved by the fixed iron core against the biasing force of the return spring, and the electromagnetic force disappears when the energization is cut off. The movable iron core is returned to the rest position by the return spring. Thereby, a linear driving force is obtained.
Here, since the coil is wound inside the pair of legs (vertically wound) with respect to the fixed iron core provided with the pair of legs in the moving direction (predetermined axis direction) of the movable core, The height dimension (dimension in the predetermined axial direction) of the fixed iron core can be reduced, and the electromagnetic actuator can be miniaturized. In addition, since the coil can be wound around the fixed iron core in the assembly process of the electromagnetic actuator, there is no need to wind and form only the coil in advance as in the prior art, and therefore the assembly man-hours (setup) can be reduced, Assembly work can be facilitated and costs can be reduced.

The said structure WHEREIN: The structure formed so that a fixed iron core may make a substantially H-shaped cross section can be employ | adopted.
According to this configuration, since the leg portion has a substantially H-shaped cross section, the coil can be reliably wound (vertically wound) in the upper and lower grooves.

In the above configuration, it is possible to adopt a configuration in which a bobbin that holds the fixed iron core is provided, the coil is integrally wound around the fixed iron core and the bobbin, and the bobbin is fixed to the body.
According to this configuration, the fixed iron core is not directly fixed to the body, but the bobbin that holds the fixed iron core is fixed to the body. In addition, since the fixed iron core and the bobbin are integrally wound by the coil, no special means for fixing the both is necessary, the assembly is simplified, and the structure is simplified.

In the above configuration, the bobbin may employ a configuration having a caulking receiving portion to be fixed to the body by caulking.
According to this configuration, when the bobbin holding the fixed iron core is caulked and fixed to the body, it is performed at the position of the caulking receiving portion of the bobbin set in advance, while maintaining the flatness of the fixed iron core with high accuracy, Can be firmly fixed.

In the above configuration, it is possible to adopt a configuration in which the fixed iron core is formed to have a substantially U-shaped cross section, and the bobbin is formed to have a substantially H-shaped cross section in cooperation with the fixed iron core. it can.
According to this configuration, since a substantially H-shaped cross section is formed with the fixed iron core held on the bobbin, the coil can be easily wound (vertically wound) in the upper and lower grooves, The fixed iron core can be securely fixed to the bobbin by winding the coil.

The said structure WHEREIN: The coil can be employ | adopted for the structure pulled out on the opposite side to the movable iron core in the predetermined axial direction.
According to this configuration, when the terminal is pulled out to the side opposite to the side from which the pair of leg portions protrude (movable iron core side), the coil is wound in the vertical direction. It is not necessary to provide the cross-sectional area without enlarging the magnetic circuit without enlarging the fixed iron core in the predetermined axial direction and the radial direction (direction perpendicular to the predetermined axial direction). Therefore, the fixed iron core can be reduced in size, and the electromagnetic actuator can be reduced in size.

In the above configuration, the body includes a holder that is made of a conductive material and fixes the fixed iron core or bobbin, and a case that is connected to the boulder and movably supports the movable iron core. It is possible to adopt a configuration in which the coil is joined to a pin-like terminal that extends in the predetermined axial direction through the through hole.
According to this configuration, one end of the coil is connected to the upper edge of the body, and the other end of the coil is joined to a pin-like terminal that passes through the through-hole of the body (for example, hermetically held by welding, soldering, or the like). Therefore, a part of the body can be applied as the other terminal paired with the pin-shaped terminal. Therefore, an electromagnetic actuator that is elongated in the predetermined axial direction and compact as a whole can be obtained.

In the above-described configuration, the pin-shaped terminal is held and the packing is formed of a resin material so as to be fitted into the through hole, and the packing includes an annular groove formed to allow deformation in the radial direction. A configuration can be employed.
According to this configuration, when the packing is fitted to the body (holder), there is an annular groove, so that the outer wall of the packing is inserted while being elastically deformed inward, and the fitting operation can be easily performed, and burrs and the like are generated. Can be prevented.

The said structure WHEREIN: The structure which is attached to the through-hole can be employ | adopted as a packing presses the sealing member which can seal a fluid.
According to this configuration, since the seal member is pressed by the packing that is securely fitted into the through hole, a fluid sealing function can be obtained with certainty.

The said structure WHEREIN: The structure which has integrally the valve body which opens and closes the channel | path which lets a fluid pass can be employ | adopted for a movable iron core.
According to this configuration, by providing the valve body that moves integrally with the movable iron core, the small and low-cost electromagnetic valve unit that opens and closes the fluid passage is driven by the electromagnetic actuator having the above-described configuration. Can be obtained. In addition, a small and low-cost gas extinguishing safety device equipped with such a solenoid valve unit can be obtained.

  As described above, according to the electromagnetic actuator of the present invention, in the electromagnetic actuator including the fixed iron core, the exciting coil, the movable iron core movable in the predetermined axial direction, the return spring, the body, etc., the fixed iron core extends in the predetermined axial direction. The height of the fixed iron core (dimension in the predetermined axial direction) can be reduced and the electromagnetic actuator can be reduced in size by providing a pair of legs to be wound and winding the coil vertically in the predetermined axial direction within the pair of legs. it can. In addition, since the coil can be wound around the fixed iron core in the assembly process of the electromagnetic actuator, there is no need to wind and form only the coil in advance as in the prior art, and therefore the assembly man-hours (setup) can be reduced, Assembly work can be facilitated and costs can be reduced.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.
1 to 7 show an embodiment in which an electromagnetic actuator according to the present invention is applied as a drive source of a gas extinguishing safety device. FIG. 1 is an external view showing the entire device, and FIG. 2 is an axial direction of the device. FIG. 3 is a sectional view showing the electromagnetic valve unit, FIG. 4 is a plan view and sectional view showing a part of the electromagnetic actuator, FIG. 5 is a sectional view showing a part of the electromagnetic actuator, and FIG. FIG. 7 is an exploded perspective view of a part of the electromagnetic actuator.

As shown in FIG. 1, this apparatus is configured such that an electromagnetic valve unit 100 and a thermocouple unit 200 are detachably connected, and an electromagnetic valve unit 100 is generated by a thermoelectromotive force (current) generated in the thermocouple unit 200. Is driven.
As shown in FIGS. 1 and 2, the thermocouple unit 200 includes a pair of heat sensitive parts 201 formed at the tip, cables 202 and 203 led from the heat sensitive parts 201, and ends of the cables 202 and 203. Female terminals 204 and 205, and a connector 206 that accommodates the female terminals 204 and 205.

  As shown in FIGS. 1 to 3, the solenoid valve unit 100 includes a fixed iron core 101, a bobbin 102 that holds the fixed iron core 101, a fixed iron core 101, and an exciting coil that is integrally wound around the bobbin 102 in a vertical winding. 103, a holder 104 as a body for fixing the bobbin 102, a pin-like terminal 105 as a terminal connected to the coil 103 (the other end 103b), a packing 106 for holding the pin-like terminal 105 at the center of the holder 104, and a packing 106 A sealing member 107 that is pressed against the gas and seals the gas, a cylindrical terminal 108 that is joined to the holder 104, a case 109 that covers the fixed iron core 101, and a shaft that is slidably supported by the case 109 110, a movable iron core 111 fixed to one end of the shaft 110, and fixed to the other end of the shaft 110. And rubber valve body 112, and is formed by a return spring 113 or the like biases in the direction of separating the valve body 112 and the movable core 111 from the fixed iron core 101 (outward).

As shown in FIGS. 4 and 7, the fixed iron core 101 is formed in a substantially U shape by a magnetic material having a high magnetic permeability such as Permalloy (trade name). The fixed iron core 101 has a pair of leg portions 101a and 101b extending in a predetermined axial direction S, a winding groove 101c formed inside the pair of leg portions 101a and 101b, and a flat held surface 101d.
As shown in FIGS. 4 and 7, the bobbin 102 is made of an electrically insulating resin material or the like, and is formed into a columnar shape from the winding groove 102a, the flat holding surface 102b that holds the fixed iron core 101, and the holding surface 102b. It has four caulking receiving portions 102c formed so as to protrude.

  The fixed iron core 101 and the bobbin 102 are formed to have a substantially H-shaped cross section with the held surface 101d joined to the holding surface 102b, as shown in FIGS. Has been. Therefore, the coil 103 is easily wound in a vertical winding along both the winding grooves 101c and 102a, and the fixed iron core 101 and the bobbin 102 are securely and integrally coupled by the wound coil 103. Is done.

The holder 104 forming a part of the body is made of a conductive material such as brass. As shown in FIGS. 5 and 6, the circular recess 104a and the circular recess 104a for accommodating the bobbin 102 holding the fixed iron core 101. A cylinder that defines a through-hole 104b formed of a small-diameter hole 104b ′ and a large-diameter hole 104b ″ formed so as to penetrate in the predetermined axial direction S at the bottom of the base, and a part of the through-hole 104b (large-diameter hole 104b ″). Part 104c and the like.

Then, in a state where the bobbin 102 and the fixed iron core 101 around which the coil 103 is wound are accommodated in the circular recess 104a, the bobbin 103 is caulked by a part 104a ″ of the upper edge portion 104a ′ as shown in FIG. The receiving portion 102c is fixed by crimping, one end 103a of the coil 103 is joined to the upper edge portion 104a 'by pressure welding, welding, soldering, or the like, and the other end 103b of the coil 103 is connected to the pin-shaped terminal 105 through the through hole 104b. Has been.
As shown in FIG. 5, the pin-shaped terminal 105 is formed in a tapered cylindrical shape (needle shape) whose tip is closed by a conductive material, and extends in the predetermined axial direction S through the center of the through hole 104b. Is arranged. As shown in FIG. 2, the pin-shaped terminal 105 is connected to the female terminal 204 in a state where the electromagnetic valve unit 100 is coupled to the thermocouple unit 200.

The packing 106 is formed in a substantially cylindrical shape from an electrically insulating resin material. As shown in FIG. 5, the packing 106 is formed around a central hole 106a and a central hole 106a for holding the pin-shaped terminal 105 at the center thereof. And an end face 106c for pressing the seal member 107.
The packing 106 may be molded integrally with the pin-shaped terminal 105 so that the pin-shaped terminal 105 is disposed in the center hole 106a.

  Here, the packing 106 is formed with an annular groove 106b that allows deformation in the radial direction. Therefore, when the packing 106 is fitted into the through hole 104b (large diameter hole 104b ″), when the packing 106 passes through the reduced diameter portion 104b ″, the outer wall of the packing 106 is closer to the annular groove 106b (diameter And is smoothly attached to the through hole 104b (large diameter hole 104b ''). Thereby, the fitting operation is easily performed, and the occurrence of burrs and the like is prevented.

  The seal member 107 is formed of a rubber material, and is pressed by the end face 106c of the packing 106 and fitted into the through hole 104b (small diameter hole 104b ′) as shown in FIG. Accordingly, it is possible to prevent fluid (gas) or the like that has entered the cover 109 from leaking outside through the through hole 104b from below the bobbin 102.

  As shown in FIG. 3, the cylindrical terminal 108 is formed in a cylindrical shape by molding (deep drawing) a conductive material such as a metal plate having a predetermined plate thickness. The cylindrical terminal 108 functions as a connector coupled to the connector 206 of the thermocouple unit 200 at the same time as being connected to the female terminal 205 of the thermocouple unit 200.

As shown in FIG. 3, the case 109 is fitted in the vicinity of the upper edge 104 a ′ of the holder 104 and covers the fixed iron core 101 and the movable iron core 111 in cooperation with the holder 104. At the same time, the movable iron core 111 is supported so as to be movable in a predetermined axial direction S.
In addition, a return spring 113 is disposed outside the case 109 to urge the valve body 112 that is integrally fixed to the movable iron core 111 via the shaft 110 outward (in a direction away from the fixed iron core 101). Yes.

Next, the procedure for assembling the electromagnetic actuator and electromagnetic valve unit 100 will be described with reference to FIGS. First, the fixed iron core 101 and the bobbin 102 are prepared, and the fixed iron core 101 is held by the bobbin 102. Subsequently, the coil 103 is integrally wound around the fixed iron core 101 and the bobbin 102 in a vertical winding. In this way, since the coil 103 can be directly assembled in a series of processes for assembling each component, there is no need to perform pre-winding in a separate process as in the prior art, and the assembling process (setup) is simplified. Can be
Subsequently, of the modularized fixed iron core 101, bobbin 102, and coil 103, the bobbin 102 is disposed in the circular recess 104a of the holder 104, and at the same time, the other end 103b of the coil 103 is passed through the through hole 104b.

  Subsequently, caulking is applied to a part 104 a ″ of the upper edge portion 104 a ′ of the holder 104, and the caulking receiving portion 102 c of the bobbin 102 is caulked and fixed. At this time, the bobbin 102 that allows a slight deformation, not the fixed iron core 101, is caulked and fixed to the holder 104. Therefore, the upper end surface (facing the movable iron core 111) of the fixed iron core 101 is not inclined and is high in a predetermined direction. Positioned and fixed with accuracy. Further, one end 103 a of the coil 103 is electrically joined to the upper edge portion 104 a ′ of the holder 104.

Subsequently, the packing 106 and the seal member 107 in which the pin-shaped terminal 105 is integrally molded are fitted into the through hole 104 b of the holder 104 so that the other end 103 b of the coil 103 is passed through the pin-shaped terminal 105. Even in this fitting operation, the packing 106 is provided with the annular groove 106b that absorbs deformation, so that the packing 106 can be easily attached without causing burrs or the like.
The fixed iron core 101 (bobbin 102) may be fixed after the packing 106 is attached to the holder 104.

  Subsequently, the cover 109 in which the movable iron core 111, the return spring 113, the valve body 112, and the like are previously assembled is connected to the vicinity of the upper edge portion 104a ′ of the holder 104. Further, the cylindrical terminal 108 is attached to the holder 104. The cylindrical terminal 108 may be joined to the holder 104 in advance. Thus, the assembly of the electromagnetic valve unit 100 including the electromagnetic actuator is completed.

The operation when the electromagnetic valve unit 100 is connected to the thermocouple unit 200 and applied as a gas extinguishing safety device will be described.
First, when the thermosensitive unit 201 of the thermocouple unit 200 is heated by the flame of the gas stove, a thermoelectromotive force is generated in the thermocouple unit 200, and the current generated by the thermoelectromotive force is supplied to the female terminals 204 and 205 and the pin shape. An electromagnetic force is generated by flowing through the coil 103 of the solenoid valve unit 100 via the terminal 105 and the cylindrical terminal 108. The movable iron core 111 is attracted to the fixed iron core 101 by this electromagnetic force. At this time, the valve body 112 moves integrally with the movable iron core 111 and is held in a state where the gas passage is opened.

On the other hand, when the flame of the gas stove disappears due to blow-off, boiling, etc., the heating of the thermocouple unit 200 is stopped, the thermoelectromotive force, that is, the electromagnetic force disappears, and the valve body 112 (and the movable core 111) is returned to the return spring. The gas passage is closed by being pushed back by 113. Thereby, discharge | release of unburned gas is prevented.
Thus, the electromagnetic actuator is suitably used as a drive source for the electromagnetic unit 100.

FIG. 8 shows another embodiment of the electromagnetic actuator according to the present invention. In this embodiment, the shape of the fixed iron core 101 ′ is changed and the bobbin 102 is abolished. Are the same. Therefore, the description of the same configuration is omitted.
In this embodiment, as shown in FIG. 8, the fixed iron core 101 ′ is formed in a substantially H shape by a magnetic material having a high magnetic permeability such as permalloy (trade name). The fixed iron core 101 ′ has two pairs of leg portions 101 a ′ and 101 b ′ extending on both sides in the predetermined axial direction S, and winding grooves 101 c ′ formed inside the two pairs of leg portions 101 a ′ and 101 b ′. Have.

  In this case, it is possible to easily wind in the vertical winding only by winding the coil 103 along the upper and lower winding grooves 101c ′. In addition, since it is directly fixed to the holder 104 without using a bobbin, the number of parts can be reduced by the amount of the bobbin, the structure can be simplified, and further, downsizing, cost reduction, etc. can be achieved as in the above embodiment. Can do.

  In the above embodiment, the case where the electromagnetic actuator of the present invention is applied as a drive source of the electromagnetic valve unit 100 and further as a part of the gas extinguishing safety device has been described. As long as the linear movement of 111 is used as a driving force, it can be applied to other electric devices.

  As described above, the electromagnetic actuator of the present invention can be used as a drive source for driving the valve body of the solenoid valve unit, as well as a drive source for electrical equipment that is required to be reduced in size and cost. Also, in fields other than electrical equipment and machine parts, the present invention can be used in various other fields as long as electromagnetic force is used as a drive source.

It is an external view which shows one Embodiment of the gas extinguishing safety device provided with the electromagnetic actuator which concerns on this invention. It is sectional drawing of the gas extinguishing safety device shown in FIG. It is sectional drawing which shows the solenoid valve unit which comprises the gas extinguishing safety device shown in FIG. FIG. 4 shows a part of the electromagnetic actuator incorporated in the electromagnetic valve unit shown in FIG. 3, wherein (a) is a plan view thereof and (b) is a sectional view thereof. It is sectional drawing which shows a part of electromagnetic actuator. A part of electromagnetic actuator is shown, (a) is the top view, (b) is the partial sectional view. It is the disassembled perspective view which decomposed | disassembled and showed a part of electromagnetic actuator. The other embodiment of the electromagnetic actuator which concerns on this invention is shown, (a) is a top view which shows the one part, (b) is sectional drawing which shows the one part. It is sectional drawing which shows the gas extinguishing safety device using the conventional electromagnetic actuator. A part of the conventional electromagnetic actuator is shown, (a) is a plan view thereof, and (b) is a sectional view thereof.

Explanation of symbols

100 Solenoid valve unit 101, 101 'Fixed iron core 101a, 101a', 101b, 101b 'A pair of leg portions 101c, 101c' Winding groove 101d Holding surface 102 Bobbin 102a Winding groove 102b Holding surface 102c Caulking receiving portion 103 For excitation Coil 103a Coil end 103b Coil other end 104 Holder (body)
104a Circular recess 104a ′ Upper edge portion 104b Through hole 104b ′ Small diameter hole 104b ″ Large diameter hole 104b ″ Reduced diameter portion 105 Pin-shaped terminal 106 Packing 106b Annular groove 106c End face 107 Seal member 108 Cylindrical terminal 109 Case (body)
DESCRIPTION OF SYMBOLS 110 Shaft 111 Movable iron core 112 Valve body 113 Return spring 200 Thermocouple unit 201 Heat sensitive part 202, 203 Cable 204, 205 A pair of female terminal 206 Connector

Claims (10)

A fixed iron core, an exciting coil wound around the fixed iron core, a movable iron core that is attracted to the fixed iron core by energization of the coil and is movable in a predetermined axial direction, and in a direction in which the movable iron core is separated from the fixed iron core An electromagnetic actuator including a return spring that biases, a body that holds the fixed iron core and movably accommodates the movable iron core,
The fixed iron core has a pair of legs extending in the predetermined axial direction,
The coil is wound in the predetermined axial direction within the pair of legs.
An electromagnetic actuator characterized by that. The fixed iron core is formed to have a substantially H-shaped cross section,
The electromagnetic actuator according to claim 1. A bobbin that holds the fixed iron core;
The coil is integrally wound around the fixed iron core and the bobbin,
The bobbin is fixed to the body;
The electromagnetic actuator according to claim 1. The bobbin has a caulking receiving part to be fixed to the body by caulking.
The electromagnetic actuator according to claim 3. The fixed iron core is formed to have a substantially U-shaped cross section,
5. The electromagnetic actuator according to claim 3, wherein the bobbin is formed to have a substantially H-shaped cross-section in cooperation with the fixed iron core. The coil is drawn to the opposite side to the movable iron core in the predetermined axial direction.
An electromagnetic actuator according to any one of claims 1 to 5, wherein The body includes a holder formed of a conductive material and fixing the fixed iron core or bobbin, and a case connected to the boulder and movably supporting the movable iron core,
The holder includes an upper edge portion to which one end of the coil is joined, and a through-hole penetrating in the predetermined axial direction.
The coil is joined to a pin-like terminal extending through the through hole in the predetermined axial direction.
The electromagnetic actuator according to claim 6. Holding the pin-shaped terminal and having a packing formed of a resin material to be fitted into the through-hole,
The packing has an annular groove formed to allow deformation in the radial direction.
The electromagnetic actuator according to claim 7. The packing is attached to the through hole so as to press a seal member capable of sealing a fluid.
The electromagnetic actuator according to claim 8. The movable iron core integrally has a valve body that opens and closes a passage through which a fluid passes.
10. The electromagnetic actuator according to claim 1, wherein:

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