JP7299718B2 - Electromagnetic actuator and blackout safety device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electromagnetic actuator that is driven by an electromagnetic force, and more particularly to an electromagnetic actuator and a safety device that are applied to a safety device such as a gas stove.

In conventional gas stoves, etc., the electromagnetic actuator of the safety device for extinguishing is composed of a U-shaped fixed iron core arranged opposite to the movable iron core, an exciting coil wound around the fixed iron core, and a fixed fixed iron core. A holder is known which includes a holder, a cylindrical pin-shaped terminal attached to the inner cylindrical portion of the holder, and a cylindrical cylindrical terminal fixed to the outer cylindrical portion of the holder (for example, see Patent Document 1. reference).

In this electromagnetic actuator, one coil is arranged with respect to a fixed iron core, and a linearly extending portion at one end of the coil is guided into a pin-shaped terminal through a through hole penetrating through the center of the fixed iron core. , are electrically connected to the tips of the pin-shaped terminals.

In the conventional electromagnetic actuator described above, one coil and one pin-shaped terminal are employed. is not easy to pass through the through-hole of the fixed core, and there is a risk of complicating the assembly work and increasing the size.

JP 2014-75962 A

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electromagnetic coil which is premised on providing two coils in a fixed iron core and which facilitates assembly work and reduces size. An object of the present invention is to provide an actuator and a safety device using the same.

The electromagnetic actuator of the present invention includes a movable iron core, a first arm portion and a second arm portion each having an end surface facing the movable iron core, a connecting bottom portion connecting the first arm portion and the second arm portion, and one side of the connecting bottom portion. a fixed core including a first notch and a second notch formed in one side and the other side, respectively ; an urging spring that biases the movable core in a direction away from the fixed core; a housing for supporting and fixedly housing the fixed core; a first pin-shaped terminal arranged facing the first notch and projecting from the housing; and a first pin-like terminal arranged facing the second notch and projecting from the housing a second pin-shaped terminal arranged around the fixed core and having one end connected to the first pin-shaped terminal through the first notch portion; and a first coil arranged around the fixed core and one end side having the second notch and a second coil connected to the second pin-shaped terminal through the portion.

In the above electromagnetic actuator, the housing may include a cylindrical case that movably supports the movable core, and a fixed holder that connects the cylindrical case and fixes the fixed core.

In the above electromagnetic actuator, the fixed holder may be made of a conductive material, and the other end side of the first coil and the other end side of the second coil may be connected to the fixed holder.

In the above electromagnetic actuator, the first coil is a fine wire arranged around the first arm via a bobbin, and the second coil is arranged directly around the second arm and has a wire diameter larger than that of the first coil. is a thick bold line.

In the above electromagnetic actuator, the bobbin may employ a configuration including a pressing portion that presses down the second coil arranged around the second arm portion.

In the above electromagnetic actuator, the bobbin includes a one-end terminal member that connects one end of the first coil and a second-end terminal member that connects the other end of the first coil. A configuration may be employed in which the first coil is connected to the first pin-like terminal via the side terminal member, and the other end of the first coil is connected to the fixed holder via the other end terminal member.

In the above electromagnetic actuator, the bobbin has a configuration including a first fitting groove into which the terminal member on one end is fitted and fixed, and a second fitting groove into which the terminal member on the other end is fitted and fixed. may

In the above electromagnetic actuator, the first fitting groove and the second fitting groove may be formed to open in the same direction on the bobbin.

In the above electromagnetic actuator, the one-end terminal member includes a flat joint that joins one end of the first coil, and the other-end terminal member includes a flat joint that joins the other end of the first coil. may be adopted.

In the above electromagnetic actuator, the fixed holder may employ a configuration including a first through hole through which the one end side terminal member is passed, and a second through hole through which the straight extension portion defining the one end side of the second coil is passed.

In the above electromagnetic actuator, a holding member made of a resin material is included to hold intermediate regions of the first pin-shaped terminal and the second pin-shaped terminal, and the fixed holder includes a fitting recess for fitting the holding member. configuration may be employed.

In the above electromagnetic actuator, the fixed holder includes a first concave portion for receiving the first pin-shaped terminal and a second concave portion for receiving the second pin-shaped terminal, and the first pin-shaped terminal and the first concave portion are provided between the first pin-shaped terminal and the first concave portion. A configuration may be employed in which a sealing member is arranged, and the second sealing member is arranged between the second pin-shaped terminal and the second recess.

The electromagnetic actuator may employ a configuration including a flange member that is fitted and fixed to the fixed holder and that is formed of a conductive material.

In the above electromagnetic actuator, a configuration including a valve body that moves integrally with the movable iron core and opens and closes the fluid passage may be employed.

In the above electromagnetic actuator, the fixed holder may employ a configuration including a male connector defined around the first pin-like terminal and the second pin-like terminal.

The extinguishing safety device of the present invention is an extinguishing safety device for shutting off the supply of gas when a gas stove is extinguished, comprising an electromagnetic actuator having any one of the above configurations including the valve body and the male connector, and a male of the electromagnetic actuator. and a thermocouple unit including a female connector that is connected to the type connector.

In the above safety device, the thermocouple unit includes a first female terminal fitted to the first pin-shaped terminal, a second female terminal fitted to the second pin-shaped terminal, and connected to the dry battery. a first cable extending from the first female terminal to connect to the first female terminal, a thermocouple, a second cable connecting the second female terminal and the thermocouple, and a second cable extending from the thermocouple to be connected to the same potential as the fixed holder A configuration including three cables may be employed.

According to the electromagnetic actuator and the blackout safety device configured as described above, simplification of assembly work, miniaturization, and the like can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a system diagram showing an embodiment of a gas stove to which a safety device having an electromagnetic actuator according to the present invention is applied; 1 is an external perspective view showing an electromagnetic actuator according to the present invention; FIG. 1 is an external perspective view showing a thermocouple unit included in a safety device according to the present invention; FIG. 3 is a cross-sectional view in a plane parallel to the axis of the electromagnetic actuator shown in FIG. 2; FIG. 3 is a cross-sectional view through the axis of the electromagnetic actuator shown in FIG. 2; FIG. FIG. 3 is a perspective view of components of the electromagnetic actuator shown in FIG. 2 with a tubular case and a flange member that form part of a housing removed; Figure 7 is a cross-sectional view through the axis of the component shown in Figure 6; 7 is an exploded perspective view of the components shown in FIG. 6 viewed from the bobbin side; FIG. FIG. 7 is an exploded perspective view of the components shown in FIG. 6 viewed from the side of the first pin-shaped terminal and the second pin-shaped terminal; 3 is an exploded perspective view showing a bobbin included in the electromagnetic actuator shown in FIG. 2, and one end terminal member and the other end terminal member fitted and attached to the bobbin; FIG. FIG. 3 is a perspective view showing a state in which one end terminal member, the other end terminal member, and a first coil are attached to a bobbin included in the electromagnetic actuator shown in FIG. 2 ;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
A safety device M according to the present invention is applied to, for example, a gas stove, and as shown in FIG. there is
The electromagnetic actuator A is attached to the gas cock body 1 of the gas stove, and arranged so that its valve body 50 opens and closes the gas passage 1a.
Here, the gas cock body 1 functions as a portion connected to a reference potential (here, ground).

In the safety device M applied to the gas stove, the first cable 6 of the thermocouple unit U is connected to the dry battery 3 via the control board 2, and the electromagnetic actuator A is timer-driven for a predetermined time at the time of ignition to open the valve body 50. The gas passage 1a is opened by maintaining the valve open state, and the thermoelectromotive force generated when the heat sensitive portion 8c located at the tip of the thermocouple 8 of the thermocouple unit U is heated by the flame 4 of the burner causes the valve body 50 to is maintained in an open state to open the gas passage 1a during steady combustion.
That is, the electromagnetic actuator A maintains the valve body 50 in the open state by the electric power of the dry battery 3 when the gas stove is ignited, and keeps the valve body 50 in the open state by the thermoelectromotive force of the thermocouple unit U during steady combustion after ignition. functions as a solenoid valve.
The negative electrode of the dry battery 3 is connected to the same potential (ground) as that of the gas cock body 1 through the control board 2 .

The thermocouple unit U, as shown in FIG. 3, extends from the female connector 5, the first female terminal 5a and the second female terminal 5b arranged in the female connector 5, A first cable 6, a second cable 7 extending from the second female terminal 5b, a thermocouple 8, and a third cable 9 extending from the thermocouple 8 are provided.

The first cable 6 has a connector 6a at its tip to be connected to the connector of the control board 2, and is electrically connected to the dry battery 3. As shown in FIG.
The second cable 7 is connected to the second female terminal 5b and the rod-shaped conductor 8a of the thermocouple 8. As shown in FIG.
The thermocouple 8 includes a rod-shaped conductor 8a and a cylindrical conductor 8b arranged outside the rod-shaped conductor 8a. The rod-shaped conductor 8a is made of, for example, an alloy material of Ni, Cu, and Mn and has a solid shape. The tubular conductor 8b is made of, for example, an alloy material of Ni, Cr, and Fe, and is formed into a multistage cylindrical shape.
A tip region of the rod-shaped conductor 8a and a tip region of the cylindrical conductor 8b are joined to form a heat-sensitive portion 8c exposed to the flame 4 of the burner.
The third cable 9 extends from the tubular conductor 8b of the thermocouple 8 and has a connection terminal 9a at its tip. The connection terminal 9a is screwed to the gas cock body 1 together with the flange member 150 of the electromagnetic actuator A, and is connected to the same potential (ground) as the fixed holder 20 of the electromagnetic actuator A via the gas cock body 1. .

As shown in FIGS. 2, 4 and 5, the electromagnetic actuator A includes a cylindrical case 10 as a housing, a fixed holder 20, a movable iron core 30, a biasing spring 40, a valve body 50, a fixed iron core 60, a bobbin 70, One end side terminal member 81 and the other end side terminal member 82 fitted to the bobbin 70, the first coil 90, the second coil 100, the first pin-shaped terminal 110, the second pin-shaped terminal 120, the holding member 130, the first An O-ring 140 and a flange member 150 are provided as a sealing member and a second sealing member.

As shown in FIGS. 2, 4 and 5, the cylindrical case 10 is made of a resin material and formed into a multi-stage cylindrical shape centered on the axis S. 11, a guide passage 14 formed in the small-diameter portion 12, and a spring receiving portion 15 formed at the boundary between the large-diameter portion 11 and the small-diameter portion 12.

The connecting claw portion 13 is snap-fitted to the annular engagement groove 23 of the fixed holder 20 .
The guide passage 14 is formed as a cylindrical hole centered on the axis S, and guides the shaft 31 of the movable iron core 30 so as to reciprocate in the axis S direction.
The spring receiving portion 15 receives one end portion of the biasing spring 40 .

The fixed holder 20 is made of a conductive material such as brass and is formed in a multi-stage disc shape. As shown in FIGS. It has a second through hole 25 , a first recess 26 , a second recess 27 , a fitting recess 28 , and a flanged fitting portion 29 .

The fixed recess 21 has a cylindrical shape with a bottom so as to accommodate and hold the connection bottom 63 of the fixed core 60 .
The outer peripheral slope portion 22 is formed in a conical shape, and the other end side of the first coil 90 and the other end side of the second coil 100 are electrically connected.
The first through hole 24 is formed at a position facing the first notch 64 of the fixed core 60 on the straight line L1 parallel to the axis S, and is connected to one end of the first coil 90. It has a cylindrical shape extending parallel to the axis S to pass the .
The second through hole 25 is formed at a position facing the second notch 65 of the fixed core 60 on the straight line L2 parallel to the axis S, and the straight extension 102 defining one end side of the second coil 100 passes through it. It has a cylindrical shape extending parallel to the axis S so as to achieve the desired result.
Here, the first through hole 24 and the second through hole 25 are formed with the same inner diameter and the same length dimension.
The first through-hole 24 and the second through-hole 25 may be formed as one large through-hole, but by forming them separately, the passage area can be reduced, and the gas entering from the valve body 50 side can be prevented. By enlarging the blocking wall, the sealing function can be improved.

The first recess 26 is formed on a straight line L1 coaxial with the first through hole 24, and has a cylindrical shape extending parallel to the axis S to receive the inner end of the first pin-shaped terminal 110 with a gap therebetween. Eggplant.
The second recess 27 is formed on a straight line L2 coaxial with the second through hole 25 and has a cylindrical shape extending parallel to the axis S to receive the inner end of the second pin-shaped terminal 120 with a gap. Eggplant.
Here, the first recess 26 and the second recess 27 are formed with the same inner diameter and the same depth dimension.
The first concave portion 26 and the second concave portion 27 may be formed as one large concave portion, but by forming them separately, the passage area can be reduced, and a barrier wall for gas entering from the valve body 50 side can be formed. By enlarging it, the sealing function can be improved.
The fitting recess 28 has a bottomed cylindrical shape centered on the axis S so that the holding member 130 is fitted therein. The outer peripheral edge of the fitting recess 28 is caulked after the holding member 130 is fitted.

The collared fitting 29 defines a collar 29a, a fitting 29b, a male connector 29c and an annular groove 29d.
The flange portion 29a is fitted to the gas cock body 1 and serves to position the flange member 150 fitted to the fitting portion 29b.
The fitting portion 29b serves to fit and fix the flange member 150. As shown in FIG.
The male connector 29c has a stepped cylindrical shape centered on the axis S so that the female connector 5 of the thermocouple unit U is connected by fitting.
The annular groove 29d is formed in a region adjacent to the flange portion 29a so that an O-ring for sealing is attached when attaching to the gas cock body 1. As shown in FIG.

As shown in FIGS. 4 and 5, the movable iron core 30 is made of a magnetic material having a high magnetic permeability and is formed in a substantially disk shape. supported by
The shaft 31 is formed of a metal material such as brass in a cylindrical shape and is slidably supported in the guide passage 14 of the cylindrical case 10. One end of the shaft 31 is connected to the movable core 30 by caulking, and the other end of the shaft 31 is a valve. It is fitted and connected to the body 50 .

As shown in FIGS. 4 and 5, the biasing spring 40 is a compression-type coil spring having one end in contact with the spring receiving portion 15 of the cylindrical case 10 and the other end adjoining the valve body 50 . It abuts on the receiving member 51 . The biasing spring 40 biases the movable core 30 away from the fixed core 60 in the axis S direction.

As shown in FIGS. 4 and 5, the valve body 50 is formed of a rubber material or the like into a substantially disk shape, and is fitted to the other end side of the shaft 31 with the spring receiving member 51 disposed inside. are concatenated as The spring receiving member 51 is formed of a metal material or the like into a disk shape so as to receive the other end of the urging spring 40 .

The stationary core 60 is made of a magnetic material with high magnetic permeability, and has a cylindrical outer contour centered on the axis S and a U shape when viewed from the direction perpendicular to the axis S, as shown in FIGS. It is shaped to have a first arm portion 61 , a second arm portion 62 , a connecting bottom portion 63 , a first notch portion 64 and a second notch portion 65 .

The first arm portion 61 extends parallel to the axis S, has an end face 61a facing the movable iron core 30 at its tip, and holds the bobbin 70 around which the first coil 90 is wound.
The second arm portion 62 extends parallel to the axis S, has an end surface 62 a facing the movable core 30 at its tip, and holds the second coil 100 .
The first arm portion 61 and the second arm portion 62 are formed symmetrically with respect to a plane including the axis S. As shown in FIG.
The connection bottom portion 63 connects the first arm portion 61 and the second arm portion 62 to form a magnetic path, and is fitted into the fitting recess 21 of the fixed holder 20 .
In order to fix the fixed core 60 to the fixed holder 20 , the connection bottom 63 is pressed by the outer peripheral edge of the fitting recess 21 while being fitted into the fitting recess 21 .
The first cutout portion 64 is formed in a groove shape extending in the direction of a straight line L1 parallel to the axis S on one side portion of the connection bottom portion 63, and is connected to one end side of the first coil 90. play a role in passing
The second notch 65 is formed in the other side of the connecting bottom 63 in the shape of a groove extending in the direction of the straight line L2 parallel to the axis S, and the straight extension 102 defining one end side of the second coil 100 passes through it. play a role.

The bobbin 70 is injection-molded using a resin material, and as shown in FIGS. A winding portion 72 , a base portion 73 , a pressing portion 74 , a first fitting groove 75 and a second fitting groove 76 are provided.

As shown in FIG. 6, the holding portion 74 serves to hold down the coil portion 101 so that the second coil 100 arranged around the second arm portion 62 does not come off from the second arm portion 62 .
The first fitting groove 75 is a curved groove that opens to the side surface 73a of the base portion 73 so that the one-end terminal member 81 is fitted and fixed.
The second fitting groove 76 forms a curved groove that opens to the side surface 73a of the base portion 73 so that the other end terminal member 82 is fitted and fixed.

Here, the first fitting groove 75 and the second fitting groove 76 are formed to open at a common side surface 73 a , that is, to open in the same direction on the bobbin 70 .
Therefore, it is easy to remove the mold when molding the bobbin 70, and the one-end terminal member 81 and the other-end terminal member 82 can be fitted from the same direction, which simplifies the setup in the assembly work. The facilitation of assembly work can be achieved.

The one-end terminal member 81 is made of a conductive material such as copper, and as shown in FIG.
The fitting portion 81 a has a bent shape so as to be closely fitted into the first fitting groove 75 of the bobbin 70 .
The flat joint portion 81b forms a flat surface parallel to the side surface 73a of the bobbin 70 so that the one end side 92 of the first coil 90 is electrically connected by pulse heat welding or the like.
The linearly extending portion 81c extends linearly in the direction of the straight line L1 parallel to the axis S, and passes through the first notch portion 64 of the fixed iron core 60 and the first through hole 24 of the fixed holder 20 to extend into the cylindrical first pin. is guided inside the shaped terminal 110 . Then, the tip region of the linearly extending portion 81c is welded to the tip region of the first pin-like terminal 110 to be electrically connected.

The terminal member 82 on the other end is made of a conductive material such as copper and, as shown in FIG. 10, has a fitting portion 82a, a flat joint portion 82b, and a straight extension portion 82c.
The fitting portion 82 a has a bent shape so as to be closely fitted into the second fitting groove 76 of the bobbin 70 .
The flat joint portion 82b forms a flat surface parallel to the side surface 73a of the bobbin 70 so that the other end side 93 of the first coil 90 is electrically connected by pulse heat welding or the like.
The linearly extending portion 82c extends linearly while being inclined with respect to the axis S, and is welded to the outer peripheral slope portion 22 of the fixed holder 20 as shown in FIGS. Connected.

Here, the one end side 92 and the other end side 93 of the first coil 90 are not directly connected to the first pin-like terminal 110 and the fixed holder 20, but the one end side terminal member 81 and the other end side terminal member 82 are connected. By interposing, simplification of assembly work, simplification of welding work, improvement of yield, etc. can be achieved. In particular, since the first coil 90 is a thin wire, the above effects are remarkable.

In addition, since the one end side 92 and the other end side 93 of the first coil 90 are joined to the flat joint portions 81b and 82b instead of being subjected to carrage treatment, the second coils arranged to face each other in the direction perpendicular to the axis S The distance to 100 can be shortened. As a result, the fixed core 60 can be made smaller, and the overall size of the electromagnetic actuator A can be made smaller.

The first coil 90 is a fine wire with a small wire diameter made of a conductive material such as copper, and is used to pass current to the dry battery 3 .
The first coil 90 includes a coil portion 91 wound around the winding portion 72 of the bobbin 70 , one end side 92 extending from the coil portion 91 , and the other end side 93 .
The one end side 92 extends along the base portion 73 of the bobbin 70 and is electrically connected to the flat joint portion 81b of the one end side terminal member 81 located on the side surface 73a.
The other end side 93 extends along the base portion 73 of the bobbin 70 and is electrically connected to the flat joint portion 82b of the other end side terminal member 82 located on the side surface 73a.
Here, since the first coil 90 is a thin wire, the electrical resistance is increased, and the life of the dry battery 3 can be extended.

The second coil 100 is made of a conductive material such as copper, is a thick wire with a wire diameter larger than that of the first coil 90, and is used to pass current generated by the thermoelectromotive force of the thermocouple 8. As shown in FIG.
The second coil 100 includes a coil portion 101 fitted around the second arm portion 62 of the fixed core 60, a straight extension portion 102 extending from the coil portion 101 to define one end side, and a linear extension portion 102 extending from the coil portion 101 to define the other end. It has straight extensions 103 defining sides.
The second coil 100 is formed in advance using an automatic forming machine or the like so as to define the coil portion 101 , the linear extension portion 102 and the linear extension portion 103 .

The linearly extending portion 102 extends linearly in the direction of a straight line L2 parallel to the axis S, and passes through the second notch portion 65 of the fixed iron core 60 and the second through hole 25 of the fixed holder 20 to form a cylindrical second pin. is guided inside the shaped terminal 120 . Then, the tip region of the straight extension part 102 is welded to the tip region of the second pin-shaped terminal 120 to be electrically connected.
The linearly extending portion 103 extends linearly in a direction parallel to the axis S and extends linearly with its tip region inclined with respect to the axis S, and as shown in FIG. It is welded to the portion 22 and electrically connected to the fixed holder 20 .
Here, since the second coil 100 is a thick wire, the electric resistance is small, and even if the electromotive force of the thermocouple 8 is small, an exciting action for functioning as an electromagnet can be obtained.

The first pin-shaped terminal 110 is made of a conductive metal material and formed in a cylindrical shape extending in the direction of a straight line L1 parallel to the axis S, as shown in FIGS. , an intermediate tubular portion 112 with a collar held by a holding member 130, and an outer tubular portion 113 protruding from the housing.
The first pin-shaped terminal 110 is arranged to face the first notch portion 64 of the fixed core 60 through the first through hole 24 on the straight line L1.
The first pin-shaped terminal 110 is electrically connected to the tip region of the straight extension portion 81c of the one end terminal member 81 into which the tip region of the outer tubular portion 113 is inserted along the straight line L1. spliced.

The second pin-shaped terminal 120 is made of a conductive metal material and formed into a cylindrical shape extending in the direction of a straight line L2 parallel to the axis S, as shown in FIGS. , an intermediate tubular portion 122 with a collar held by the holding member 130, and an outer tubular portion 123 protruding from the housing.
The second pin-shaped terminal 120 is arranged to face the second notch 65 of the fixed core 60 through the second through hole 25 on the straight line L2.
The second pin-shaped terminal 120 is electrically joined by welding W to the tip region of the straight extension portion 102 inserted along the straight line L2.

Here, in the first pin-shaped terminal 110 and the second pin-shaped terminal 120, the inner cylindrical portion 111 and the inner cylindrical portion 121 have the same outer diameter, and the outer cylindrical portion 113 and the outer cylindrical portion 123 have the same outer diameter. formed differently.
According to this, the two pin-shaped terminals can be distinguished from each other by the difference in the outer diameters of the outer cylindrical portion 113 and the outer cylindrical portion 123, and the outer diameters of the inner cylindrical portion 111 and the inner cylindrical portion 121 are the same. Therefore, the same O-ring 140 can be used as the first seal member and the second seal member, and cost reduction can be achieved by common use of parts.

As shown in FIGS. 7 to 9, the holding member 130 is made of an electrically insulating resin material and is formed into a substantially circular shape by insert molding that embeds the intermediate regions of the first pin-shaped terminal 110 and the second pin-shaped terminal 120 . It is formed in a columnar shape.
Then, the holding member 130 is fitted into the fitting recess 28 of the fixed holder 20 and crimped so that the first pin-shaped terminal 110 is aligned with the straight line L1 and the second pin-shaped terminal 120 is aligned with the straight line L2. Position and hold on top.

The O-ring 140 is made of a rubber material and has an annular shape. 110 and between the inner cylindrical portion 111 and the first recess 26 and between the inner cylindrical portion 121 and the second recess 27 of the second pin-like terminal 120, respectively.
As a result, gas entering from the valve body 50 side can be completely blocked from passing through the fitting recess 28 of the fixed holder 20, and the sealing function can be improved.
In particular, the O-ring 140 seals between members made of metal material, so that the airtightness is further enhanced.

2, 4, and 5, the flange member 150 is formed as a long lozenge-shaped flat plate by press-molding a conductive metal material such as a steel plate. It has a joint hole 151 and two circular holes 152 for passing fastening screws.
The flange member 150 is fitted into the fitting portion 29b of the fixed holder 20 and fixed to the fixed holder 20 integrally.

Since the flange member 150 is formed separately from the fixed holder 20 in this way, it is possible to use a material that is less expensive than the material of the fixed holder 20, and the flange member 150 can be appropriately adjusted according to the mounting shape of the gas cock body 1. can be set.

Next, the assembly work of the electromagnetic actuator A will be described.
Prior to the work, the cylindrical case 10 in which the movable iron core 30, the biasing spring 40, the valve body 50 and the like are assembled in advance, the fixed holder 20, the fixed iron core 60, the terminal member 81 on the one end side, the terminal member 82 on the other end side, and the second A bobbin 70 pre-assembled with a first coil 90, a pre-molded second coil 100, a holding member 130 insert-molded with a first pin-shaped terminal 110 and a second pin-shaped terminal 120, two O-rings 140, and a flange member. 150 are prepared.

Subsequently, the two O-rings 140 are fitted into the inner tubular portion 111 of the first pin-shaped terminal 110 and the inner tubular portion 121 of the second pin-shaped terminal 120, respectively.
Subsequently, the holding member 130 is brought close to the fitting recess 28 of the fixed holder 20, one O-ring 140 is fitted into the first recess 26, the other O-ring 140 is fitted into the second recess 27, and the holding member 130 is fitted. A member 130 is fitted into the fitting recess 28 .
Then, the outer peripheral edge of the fitting recess 28 is caulked, and the holding member 130 is fixed to the fixed holder 20 .

Next, the fixed iron core 60 is aligned with the fixed holder 20 so that the first notch 64 is aligned with the first through hole 24 on the straight line L1 and the second notch 65 is aligned with the second through hole 25 on the straight line L2. , and the connecting bottom portion 23 is fitted into the fixed concave portion 21 .
Thereafter, the fixed core 60 is fixed to the fixed holder 20 by caulking the outer peripheral edge of the fixed recess 21 .

Subsequently, the second coil 100 is brought closer to the fixed core 60 in the direction of the axis S, the coil portion 101 is fitted into the second arm portion 62, and the straight extension portion 102 extends through the second through hole 25 on the straight line L2. It is inserted into the two-pin terminal 120 , and the linearly extending portion 103 is brought into contact with the outer peripheral slope portion 22 .
Subsequently, the bobbin 70 is brought closer to the fixed core 60 in the direction of the axis S and fitted into the first arm portion 61, and the straight extension portion 81c of the one end terminal member 81 extends through the first through hole 24 on the straight line L1. It is inserted into the pin-shaped terminal 110 , and the linearly extending portion 82 c of the terminal member 82 on the other end side is brought into contact with the outer peripheral slope portion 22 .

Then, while the coil portion 101 of the second coil 100 is pressed by the pressing portion 74 of the bobbin 70 , the straight extension portion 82 c and the straight extension portion 103 are welded to the outer peripheral slope portion 22 of the fixed holder 20 .
Thereby, the other end side of the first coil 90 and the other end side of the second coil 100 are electrically connected to the fixed holder 20 .

Subsequently, the tip region of the linearly extending portion 81c is joined by welding W to the tip region of the outer cylinder portion 113 of the first pin-shaped terminal 110 to be electrically connected.
In addition, the tip region of the linearly extending portion 102 is joined by welding W to the tip region of the outer cylindrical portion 123 of the second pin-shaped terminal 120 to be electrically connected.
After that, the cylindrical case 10 is brought closer to the fixed holder 20 in the direction of the axis S, and the connecting claw portion 13 is snap-fitted to the annular engaging groove 23, whereby the cylindrical case 10 is assembled to the fixed holder 20. .
As described above, the assembly of the electromagnetic actuator A is completed. It should be noted that the above assembling procedure is an example, and other procedures may be employed.

As described above, in the work of assembling the electromagnetic actuator A, it is only necessary to move and assemble the parts in the direction of the axis S, so that it can be automatically assembled on the automatic assembly line. As a result, productivity improvement, yield improvement, manufacturing cost reduction, and the like can be achieved.
Further, by connecting the female connector 5 of the thermocouple unit U to the male connector 29c of the electromagnetic actuator A, the assembly of the safety device M is completed.

Next, the operation of the safety device M for the gas stove will be described.
First, in the gas stove, when ignition is performed by the igniter based on the ignition operation by the external operation knob or operation button, etc., the first The coil 90 is energized to generate an electromagnetic force.
Further, during the ignition operation, the valve body 50 moved to the valve open state by the driving force interlocking with the operation knob or operation button, etc., is caused by the movable iron core 30 being attracted to the fixed iron core 60 by the generated electromagnetic force. The valve is kept open. The driving force for moving the valve body 50 in the valve-opening direction acts only during the ignition operation.

Then, when the gas flows through the gas passage 1a to the burner and is ignited, and the heat sensing portion 8c is heated by the flame 4, the thermocouple 8 generates a thermoelectromotive force, which energizes the second coil 100. electromagnetic force is generated.
After that, the energization of the first coil 90 by the power of the dry cell 3 is cut off after a predetermined time has passed. During steady-state combustion, the valve body 50 is kept open only by the excitation action of the second coil 100 being energized.
That is, the first coil 90 is used only for a predetermined time at the time of ignition in order to quickly stabilize combustion.

On the other hand, when the flame of the gas stove goes out due to blowing out, boiling over, etc., the heating of the heat sensitive part 8c of the thermocouple unit U stops, the thermoelectromotive force, that is, the electromagnetic force disappears, and the valve body 50 and the movable iron core 30 It is pushed back by the urging spring 40 to close the gas passage 1a. This prevents the release of unburned gas.

As described above, according to the electromagnetic actuator A and the safety device M, simplification and automation of assembly work, miniaturization, ensuring airtightness, improvement of productivity, improvement of yield, etc. are achieved.

In the above embodiment, the U-shaped fixed core 60 is shown as the fixed core, but the present invention is not limited to this. As long as it has a second notch portion through which one end side of the second coil is passed, the stationary core having another shape may be adopted.

Although the first coil 90 is arranged on the first arm portion 61 and the second coil 100 is arranged on the second arm portion 62 in the above-described embodiment, the present invention is not limited to this. If one end side (one end side terminal member) of the first coil is passed through the first notch portion, and one end side (straight extension portion) of the second coil is passed through the second notch portion. Alternatively, the first coil and the second coil may be arranged with respect to one arm, or a configuration in which one coil is arranged over both arms may be employed.

In the above-described embodiment, the first coil 90 is disposed on the first arm portion 61 via the bobbin 70. However, the present invention is not limited to this. A configuration may be adopted in which the other end side terminal member 82 is eliminated, and one end side of the first coil is directly connected to the first pin-shaped terminal, and the other end side of the first coil is directly connected to the fixed holder.

In the above embodiment, the case where the electromagnetic actuator A is applied as part of the safety device M is shown. For example, it can also be applied to other electrical equipment.

As described above, the electromagnetic actuator of the present invention achieves simplification and automation of assembly work, miniaturization, ensuring airtightness, improvement of productivity, improvement of yield, etc., and is therefore suitable as a safety device for extinguishing. Not only can it be used, but it is also useful in electrical equipment, mechanical parts, and other fields where miniaturization and improved assembly are required.

A Electromagnetic actuator U Thermocouple unit M Safety device 3 Dry battery 5 Female connector 5a First female terminal 5b Second female terminal 6 First cable 7 Second cable 8 Thermocouple 9 Third cable 10 Cylindrical case (housing )
20 Fixed holder (housing)
24 First through hole 25 Second through hole 26 First recess 27 Second recess 28 Fitting recess 30 Movable iron core 40 Biasing spring 50 Valve element 60 Fixed iron core 61 First arm 61a End face 62 Second arm 62a End face 63 Connection bottom 64 First notch 65 Second notch 70 Bobbin 75 First fitting groove 76 Second fitting groove 81 One end terminal member 82 Other end terminal member 90 First coil 92 One end 93 Other end 100 Second coil 102 Straight extension part (one end side)
103 Linear extension (other end side)
110 First pin-shaped terminal 120 Second pin-shaped terminal 130 Holding member 140 O-ring (first sealing member, second sealing member)
150 flange member

Claims (17)

a movable iron core;
A first arm and a second arm each having an end surface facing the movable core, a connecting bottom connecting the first arm and the second arm, formed on one side and the other side of the connecting bottom, respectively a fixed core including a first notch and a second notch;
a biasing spring that biases the movable core in a direction away from the fixed core;
a housing that movably supports the movable core and fixedly accommodates the fixed core;
a first pin-shaped terminal arranged to face the first notch portion and protruding from the housing;
a second pin-like terminal arranged to face the second notch portion and protruding from the housing;
a first coil arranged around the fixed core and having one end connected to the first pin-shaped terminal through the first notch;
a second coil arranged around the fixed core and having one end connected to the second pin-shaped terminal through the second notch;
electromagnetic actuators. The housing includes a cylindrical case that movably supports the movable core, and a fixed holder that connects the cylindrical case and fixes the fixed core,
The electromagnetic actuator according to claim 1 , characterized in that: The fixed holder is made of a conductive material,
The other end side of the first coil and the other end side of the second coil are connected to the fixed holder,
3. The electromagnetic actuator according to claim 2 , characterized in that: The first coil is a thin wire arranged around the first arm via a bobbin,
The second coil is a thick wire arranged directly around the second arm and having a wire diameter larger than that of the first coil.
4. The electromagnetic actuator according to claim 3 , characterized in that: The bobbin includes a holding portion that holds down the second coil arranged around the second arm,
5. The electromagnetic actuator according to claim 4 , characterized in that: The bobbin includes a one-end terminal member that connects one end of the first coil and a second-end terminal member that connects the other end of the first coil,
one end side of the first coil is connected to the first pin-shaped terminal via the one end side terminal member;
The other end side of the first coil is connected to the fixed holder via the other end terminal member,
6. The electromagnetic actuator according to claim 4 or 5, characterized in that: The bobbin includes a first fitting groove for fitting and fixing the one end terminal member, and a second fitting groove for fitting and fixing the other end terminal member,
7. The electromagnetic actuator according to claim 6 , characterized in that: The first fitting groove and the second fitting groove are formed to open in the same direction in the bobbin,
8. The electromagnetic actuator according to claim 7 , characterized in that: the one end side terminal member includes a flat joint portion that joins one end side of the first coil;
The other end terminal member includes a flat joint portion that joins the other end side of the first coil,
The electromagnetic actuator according to any one of claims 6 to 8, characterized in that: The fixed holder includes a first through hole through which the one end side terminal member passes, and a second through hole through which a straight extension portion defining one end side of the second coil passes,
10. The electromagnetic actuator according to any one of claims 6 to 9, characterized in that: a holding member made of a resin material to hold intermediate regions of the first pin-shaped terminal and the second pin-shaped terminal;
The fixed holder includes a fitting recess for fitting the holding member,
11. The electromagnetic actuator according to claim 10 , characterized in that: The fixed holder includes a first recess for receiving the first pin-shaped terminal and a second recess for receiving the second pin-shaped terminal,
A first sealing member is arranged between the first pin-shaped terminal and the first recess,
A second sealing member is arranged between the second pin-shaped terminal and the second recess,
12. The electromagnetic actuator according to claim 11 , characterized in that: including a flange member fitted and fixed to the fixed holder and made of a conductive material;
13. The electromagnetic actuator according to any one of claims 2 to 12, characterized in that: Including a valve body that moves integrally with the movable iron core and opens and closes a fluid passage,
14. The electromagnetic actuator according to any one of claims 2 to 13, characterized in that: wherein the fixed holder includes a male connector defined around the first pin-like terminal and the second pin-like terminal;
15. The electromagnetic actuator according to claim 14 , characterized in that: A safety device for shutting off gas supply when a gas stove goes out,
an electromagnetic actuator according to claim 15 ;
a thermocouple unit including a female connector connected to a male connector of the electromagnetic actuator;
A safety device characterized by: The thermocouple unit includes a first female terminal fitted to the first pin-shaped terminal, a second female terminal fitted to the second pin-shaped terminal, and the second female terminal to be connected to the dry battery. A first cable extending from one female terminal, a thermocouple, a second cable connecting the second female terminal and the thermocouple, and extending from the thermocouple to be connected to the same potential as the fixed holder. and a third cable to
The safety device according to claim 16 , characterized in that:

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