JP3241085U - Electromagnetic actuator and blackout safety device - Google Patents

Abstract

An electromagnetic actuator used for a safety device for a gas stove is provided.
A movable iron core (30), a fixed iron core (60) arranged opposite to the movable iron core, an urging spring (40) that urges the movable iron core in a direction away from the fixed iron core, and a cylinder that movably supports the movable iron core. and a fixed holder 20 for fixedly housing a fixed iron core. A first pin-like terminal 120 to which one end of the first coil is connected and a second pin-like terminal 130 to which one end of the second coil is connected are fixed to a fixed holder via a guide member 110. ing. The guide member 110 has a first through hole and a second through hole with tapered portions. A valve body 50 that moves integrally with the movable iron core opens and closes the gas passage, and the gas leakage prevention mechanism obtains airtightness by one seal member 150 closely fitted to the holding member.
[Selection drawing] Fig. 3

Description

The present invention relates to an electromagnetic actuator driven by electromagnetic force. More particularly, the present invention relates to an electromagnetic actuator for use in a gas stove safety device.

Conventionally, a safety device for a gas stove that uses an electromagnetic actuator is known. For example, in the blackout safety device disclosed in Patent Document 1, an electromagnetic actuator is connected to a gas stove via a thermocouple unit. A valve element provided in the electromagnetic actuator is arranged in the gas passage of the gas stove, and the movement of the valve element in the gas passage causes the valve to open and close.

FIG. 10 shows an electromagnetic actuator 301 described in Patent Document 1. As shown in FIG. 10A is a cross-sectional view passing through the axis S, FIG. 10B is a cross-sectional view in a plane that intersects the cross-section of FIG. 10A at 90 degrees, and FIG. is.

The electromagnetic actuator 301 has a movable iron core 330 and a fixed iron core 360, and the valve body 350 is attached to the movable iron core 330 via an intermediate member.

The stationary core 360 includes two types of coils (first coil 370 and second coil 375). The gas ignition operation brings the movable iron core 330 and the fixed iron core 360 into close contact with each other, and in this state, the first coil 370 is energized to generate an electromagnetic force to open the valve and allow gas to flow. During steady-state combustion, the second coil 375 is energized to generate an electromagnetic force, which maintains the valve open state and allows gas to flow. When the second coil 375 is energized and reaches a current sufficient to attract the movable iron core, the energization of the first coil 370 is stopped.

A first pin-shaped terminal 380 electrically connected to one end 371 of the first coil is connected to the first female terminal of the thermocouple unit, and a second pin-shaped terminal electrically connected to one end 373 of the second coil. Terminal 382 is connected to the second female terminal of the thermocouple unit. The first pin-shaped terminal 380 and the second pin-shaped terminal 382 are inserted into the holding member 378, and inside the electromagnetic actuator 301, the cylindrical portion 385 of the first pin-shaped terminal and the cylindrical portion 387 of the second pin-shaped terminal are mounted. are aligned in parallel and protrude from the holding member 378 .

Therefore, when assembling the electromagnetic actuator 301, one end 371 of the first coil is inserted inside the tubular portion 385 of the first pin-shaped terminal 380 to electrically connect the one end 371 of the first coil and the first pin-shaped terminal. Let Similarly, the terminal, which is one end 373 of the second coil, is inserted inside the tubular portion 387 of the second pin-shaped terminal 382 to electrically connect the one end 373 of the second coil and the second pin-shaped terminal. Referring to FIG. 10(c), one end 371 of the first coil is passed through passage 322 and inside cylindrical portion 385 of the first pin-shaped terminal. Similarly, one end 373 of the second coil is passed through the passage 323 inside the tubular portion 387 of the second pin-like terminal. In FIG. 10(c), each coil is blacked out for clarity.

The electromagnetic actuator 301 has a spindle shape with a diameter of about 1 cm and an axial length of about several cm. It is a part. The upper passages (322, 323) of the cylindrical portions (385, 387) of the pin-shaped terminals with a diameter of several mm function as guides for the ends (371, 373) of each coil to the cylindrical portions (385, 387). was inadequate. Therefore, it is not easy to insert one end 371 of the first coil and one end 373 of the second coil into the cylindrical portion 385 of the first pin-like terminal and the cylindrical portion 387 of the second pin-like terminal, respectively. I had a problem with assembly.

On the other hand, since the valve body 350 is arranged in the gas passage, the electromagnetic actuator 301 is required to be airtight with the outside in order to prevent gas leakage. In the electromagnetic actuator 301, it is necessary to take measures to maintain airtightness between the fitting portion of the fixed holder 320 and the holding member 378, between the fixed holder 320 and the first pin-shaped terminal, and between the fixed holder 320 and the second pin-shaped terminal. is.

Therefore, the holding member 378 is fixed by the fixed holder 320, and O-rings are used to obtain airtightness at the portions where the fixed holder and the pin-shaped terminals are in contact with each other. That is, when the electromagnetic actuator 301 is assembled, the O-ring 390 is fitted between the outside of the tubular portion 385 of the first pin-shaped terminal and the fixed holder 320, and the outside of the tubular portion 387 of the second pin-shaped terminal and the fixed holder 320 is fitted. An O-ring 392 was fitted between them, and two O-rings were used to obtain airtightness.

FIG. 11 shows an electromagnetic actuator 400 described in Patent Document 2. As shown in FIG. The electromagnetic actuator 400 is an electromagnetic actuator used as a safety device for a gas stove, and an insulating gasket 410 functions to ensure airtightness. Insulating gasket 410 is provided at the end of support member 401 to provide a tight seal between support member 401 and insulating gasket 410, a tight seal between insulating gasket 410 and conductive sleeve 402, or between insulating gasket 410 and conductive sleeve 404. ensure the airtightness of

However, when the insulating gasket 410 is arranged at the end of the support member 401 when assembling the electromagnetic actuator 400, the distance over which the conductive sleeves 402 and 404 slide on the insulating gasket 410 is long, and the hole of the insulating gasket 410 is large. It is easily damaged or clogged with dust, and there is a risk of gas leakage. In addition, because of the structure in which the insulating gasket 410 is arranged at the terminal, it is difficult to fix the support member 401 and the bush 403 in the rotational direction. When mounting the bushing 403 may rotate with respect to the support member 401, there is a risk of breaking the electrical connection. In addition, the deformation of the insulating gasket 410 due to rotation may create a gap between the insulating gasket 410 and the conductive sleeve 402 or between the insulating gasket 410 and the conductive sleeve 404, risking gas leakage.

Referring to FIG. 11, in the electromagnetic actuator 400 described in Patent Document 2, in order to guide each one end (405, 406) of each coil to the entrance of the conductive sleeve (402, 404), A guiding taper (413, 414) is provided above. However, the guiding tapers (413, 414) of the electromagnetic actuator 400 are integral with the bushing 403 and are constructed as part of the bushing 403. As shown in FIG. Therefore, the insulating gasket 410 has to be arranged at the end of the support member 401 . Therefore, the above problems cannot be avoided.

JP 2020-148222 CN205618786U

An object of the present invention is to provide a means for obtaining airtightness of an electromagnetic actuator used in a safety device for a gas stove, which is excellent in workability and assembly.

(1) A movable iron core, a first arm portion and a second arm portion which are arranged to face the movable iron core and have end surfaces facing the movable iron core, and which connect the first arm portion and the second arm portion a fixed iron core including a connection bottom, a biasing spring that biases the movable iron core in a direction away from the fixed iron core, a tubular case that movably supports the movable iron core, and a fixed iron core that houses the fixed iron core. and a fixed holder joined to the cylindrical case, and a first pin-shaped terminal and a second pin-shaped terminal fixed to the fixed holder via a holding member, one end of which is attached to the first pin-shaped terminal. A first coil to be connected is disposed around one or both of a first arm portion and a second arm portion of the fixed core, and a second coil having one end connected to the second pin-shaped terminal is the fixed core. The connecting bottom portion of the fixed iron core includes a hole or notch through which one end of the first coil and one end of the second coil are inserted. , the first pin-like terminal and the second pin-like terminal are both arranged to face the connecting bottom, one end of the first coil is connected to the first pin-like terminal, and one end of the second coil is connected to the first pin-like terminal. is connected to the second pin-like terminal, guides one end of the first coil to the first pin-like terminal, and guides one end of the second coil to the second pin-like terminal; The problem is solved by an electromagnetic actuator provided with a seal member for shielding a gap between a fixed holder, the holding member, the first pin-shaped terminal, and the second pin-shaped terminal at a position where the holding member is in contact with the guide member.
(2) The electromagnetic actuator according to (1), wherein the first coil is arranged around the first arm, and the second coil is arranged around the first arm and around the second arm. solve the problem.
(3) The guide member includes a first through hole for guiding one end of the first coil to the first pin-shaped terminal and a second through hole for guiding one end of the second coil to the second pin-shaped terminal. The first through hole has a through hole inlet at which one end of the first coil exits from the hole or notch and enters the through hole, and one end of the first coil exits from the through hole to form the first pin. a through hole outlet for entering the terminal, and the first through hole has a taper in which the diameter gradually decreases from the through hole inlet toward the through hole outlet. to solve.
(4) The problem is solved by the electromagnetic actuator according to (1), wherein the guide member is a separate member independent of other members in the electromagnetic actuator.
(5) It includes a valve body that moves integrally with the movable iron core and opens and closes a fluid passage, and the fixed holder includes a male connector provided around the first pin-shaped terminal and the second pin-shaped terminal. The problem is solved by the electromagnetic actuator according to any one of (1) to (4) characterized by:
(6) A safety device for shutting off gas supply when a gas stove goes out, comprising: the electromagnetic actuator according to (5); and a thermocouple unit including a female connector connected to a male connector of the electromagnetic actuator. and the thermocouple unit includes a first female terminal fitted to the first pin-shaped terminal of the electromagnetic actuator, and a second female terminal fitted to the second pin-shaped terminal of the electromagnetic actuator. a first cable extending from the first female terminal to be connected to the dry battery; a thermocouple; a second cable connecting the second female terminal and the thermocouple; The problem is solved by an extinguishing safety device that includes a third cable extending from the thermocouple to achieve the desired result.

Regarding (1), the movable iron core has a first arm and a second arm, but a configuration in which both the first coil and the second coil are arranged on one arm may be employed. Alternatively, one coil may be arranged across both the first arm and the second arm.

With respect to (1), a seal member for shielding a gap between the fixed holder, the holding member, the first pin-shaped terminal, and the second pin-shaped terminal is provided at a position of the holding member in contact with the guide member. Gas leakage can be effectively prevented when the actuator is used as a safety device for a gas stove.

Regarding (3), the second through-hole may have a through-hole inlet, a through-hole outlet and a taper like the first through-hole.

With respect to (4), the guide member is a separate member independent of other members in the electromagnetic actuator, so that a gap between the fixed holder, the holding member, the first pin-shaped terminal, and the second pin-shaped terminal is formed at the position in contact with the guide member. A sealing member can be arranged to shield the

Regarding (4), the guide member is a separate member independent of other members in the electromagnetic actuator, so that it is easy to adapt to changes in the shape of the guide member. The shape of the guide member can be changed according to the outlet positions of the two types of coil terminals from the fixed iron core.

Electromagnetic actuators are not limited to use in blackout safety devices. The present invention can be applied to other electrical equipment as long as it utilizes the linear movement of the movable iron core as driving force.

In the work of assembling the electromagnetic actuator, it is only necessary to move and assemble the parts in the direction of the axis S, so it can be assembled on an automatic assembly line. As a result, productivity can be improved and manufacturing costs can be reduced.

1 is an external perspective view of an electromagnetic actuator according to the present invention; FIG. 2 is a cross-sectional view along a plane passing through an axis S and an A1-A2 line in FIG. 1; FIG. 2 is a cross-sectional view of a plane passing through the axis S and orthogonal to a plane passing through the axis S and the line A1-A2 in FIG. 1; FIG. 1 is an exploded perspective view showing a part of components of an electromagnetic actuator according to the present invention; FIG. 1 is an exploded perspective view showing a part of components of an electromagnetic actuator according to the present invention; FIG. FIG. 3 is a cross-sectional view of the guide member according to the present invention taken along the plane passing through the axis S; (a) is a cross-sectional view of a guide member according to the present invention taken along an axis S, and (b) is an external perspective view of the same guide member. 1 is an external perspective view of a sealing member according to the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system diagram of a gas stove to which a safety device for extinguishing with an electromagnetic actuator according to the present invention is applied; It is an electromagnetic actuator according to a conventional example. It is an electromagnetic actuator according to a conventional example.

BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will now be described in detail based on examples.

[Structure of Electromagnetic Actuator]
An electromagnetic actuator 1 according to the present invention will be described with reference to FIGS. 1 to 8. FIG.

1 and 2, the electromagnetic actuator 1 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, a first coil, and a 90 , a second coil 100 , a guide member 110 , a first pin-like terminal 120 , a second pin-like terminal 130 , a holding member 140 , a sealing member 150 and a flange member 160 .

Cylindrical case 10 is made of a resin material. Referring to FIGS. 1 to 3, particularly FIG. 3, cylindrical case 10 is formed in a multistage cylindrical shape centered on axis S, and includes guide passage 12, spring receiving portion 15, and connecting claw portion 17. As shown in FIG. The guide passage 12 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 the urging spring 40 . The connecting claw portion 17 is snap-fitted to the cylindrical case engaging groove 23 of the fixed holder 20, whereby the cylindrical case 10 and the fixed holder 20 are connected to form an integrated housing.

The fixed holder 20 is made of a conductive material such as brass. Referring to FIG. 3, the fixed holder 20 is formed in a multistage cylindrical shape centered on the axis S, and includes a fixed groove portion 21, an outer peripheral inclined surface portion 22, a cylindrical case engaging groove 23, a flange portion 27, and a thermocouple unit. A matching groove 29 is provided. The fixed groove portion 21 is a groove provided on the inner circumference of the fixed holder 20 and accommodates and holds the connection bottom portion 63 of the fixed iron core 60 . The outer peripheral slope portion 22 is a surface formed in a conical shape on the outer periphery of the fixed holder 20 . 103 are electrically connected. The flange portion 27 is fitted to the gas cock body 180 (FIG. 9) when the electromagnetic actuator 1 is attached to the thermocouple unit 190 (FIG. 9). The thermocouple unit engagement groove 29 is a groove provided on the outer periphery of the fixed holder 20, and is connected by fitting with a female connector 191 (FIG. 9) of the thermocouple unit.

2 and 3, movable iron core 30 is made of a magnetic material with high magnetic permeability and is formed in a substantially disk shape. The shaft 31 is made of a metal material such as brass and has a cylindrical shape. One end side of the shaft 31 is connected to the movable core 30 by caulking, and the other end side of the shaft 31 is fitted and connected to the valve body 50 . The movable iron core 30 is supported by the guide passage 12 of the cylindrical case 10 so as to be able to reciprocate in the direction of the axis S through the shaft 31 .

Referring to FIG. 3 , the biasing spring 40 has one end in contact with the spring receiving portion 15 of the cylindrical case 10 and the other end in contact with the spring receiving member 51 of the valve body 50 . The biasing spring 40 is a compression-type coil spring, and biases the movable core 30 away from the fixed core 60 in the direction of the axis S.

Referring to FIGS. 1 to 3, valve body 50 is made of a rubber material or the like and has a substantially disk shape. The valve body 50 is fitted and connected to the other end side of the shaft 31 with the spring receiving member 51 provided inside.

Figure 2. 4 and 5, fixed iron core 60 is made of a magnetic material with high magnetic permeability, has a cylindrical outer contour centered on axis S, and has first arm portion 61 and second arm portion 62. and a U-shape with a connecting bottom 63 . The fixed core 60 has a first cutout portion 64 and a second cutout portion 65 in the connection bottom portion 63 . The first arm portion 61 and the second arm portion 62 are formed symmetrically with respect to a plane passing through the axis S. As shown in FIG. The first arm portion 61 has an end surface 61a arranged to face the movable core 30 at its tip. The second arm portion 62 extends parallel to the axis S, and has an end face 62a arranged to face the movable core 30 at its tip. The connecting bottom portion 63 connects the first arm portion 61 and the second arm portion 62 to form a magnetic path. The connecting bottom portion 63 is fitted to the fixed holder 20 and fixed by caulking.

Referring to FIG. 2 , bobbin 70 wound with first coil 90 is held by first arm 61 , and second coil 100 is held by first arm 61 and second arm 62 . 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 through the dry battery 199 (FIG. 9). Since the first coil 90 is a fine wire, the electrical resistance is increased, the current consumption is suppressed, and the life of the dry battery 199 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 197 (FIG. 9). be. Since the second coil 100 is a thick wire, the electric resistance is small, and even if the electromotive force of the thermocouple 197 is small, an exciting action for functioning as an electromagnet can be obtained.

Referring to FIGS. 4 and 5, bobbin 70 is made of a resin material and has one end terminal member 81 and the other end terminal member 82 . Both the one end terminal member 81 and the other end terminal member 82 are made of a conductive material such as copper. One end side of the first coil 90 is electrically connected to the one end side terminal member 81 of the bobbin, and the other end side is electrically connected to the other end side terminal member 82 of the bobbin 70 . The one-end terminal member 81 extends linearly in a direction parallel to the axis S and passes through the first notch portion 64 of the fixed iron core 60, the first through hole 115 of the guide member 110, and the first seal hole 151 of the seal member 150. It is inserted into the tubular portion 121 of the tubular first pin-shaped terminal and guided into the first pin-shaped terminal 120 . A tip region of the one-end terminal member 81 is welded and electrically connected to a tip region of the first pin-shaped terminal.

With reference to FIGS. 4 and 5, the second coil 100 includes a one end side extension portion 102 and an other end side extension portion 103 . The second coil 100 is formed in advance using an automatic forming machine or the like. The one end side extending portion 102 extends linearly in a direction parallel to the axis S and passes through the second notch portion 65 of the fixed core 60, the second through hole 116 of the guide member 110, and the second seal hole 152 of the seal member 150. Then, it is inserted into the cylindrical portion 131 of the cylindrical second pin-shaped terminal and guided into the cylindrical second pin-shaped terminal 130 . The tip region of the one end side extension part 102 is welded and electrically connected to the tip region of the second pin-shaped terminal 130 .

2 to 4, the other end side terminal member 82 of the bobbin 70 electrically connected to the other end side of the first coil 90 extends linearly at an angle to the axis S and is fixed. It is welded to the outer peripheral slope portion 22 of the holder 20 and electrically connected to the fixed holder 20 . A distal end portion of the other end side extension portion 103 of the second coil 100 is welded to the outer peripheral slope portion 22 of the fixed holder 20 and electrically connected to the fixed holder 20 .

2 to 6, and more particularly to FIG. 6, the guide member 110 will be described. The guide member 110 has a cylindrical shape and includes a first through hole 115 and a second through hole 116 . Each through-hole has an inlet (first through-hole inlet 111, second through-hole inlet 112), a tapered portion (first tapered portion 113, second tapered portion 114), and an outlet (first through-hole outlet 117, second 2 through-hole outlets 118). The wall surface from each through-hole entrance to the through-hole has a tapered shape, and the diameter gradually decreases from the through-hole entrance to the through-hole. The first through-hole outlet has an inner diameter that fits inside the cylindrical portion 121 of the first pin-shaped terminal 120 , and the second through-hole outlet fits inside the cylindrical portion 131 of the second pin-shaped terminal 130 . inside diameter.

3 to 5, the first pin-shaped terminal 120 and the second pin-shaped terminal 130 are made of a conductive metal material and formed in a cylindrical shape extending in a direction parallel to the axis S. As shown in FIG. The holding member 140 is made of an electrically insulating resin material and formed into a substantially cylindrical shape by insert molding that embeds the intermediate regions of the first pin-shaped terminal 120 and the second pin-shaped terminal 130 . The holding member 140 is fitted to the fixed holder 20 and crimped.

Both the first pin-shaped terminal 120 and the second pin-shaped terminal 130 have intermediate regions held by a holding member 140, and one end of each protrudes outward from the fixed holder 20 and extends in a direction parallel to the S axis. The other end of the extends protruding from the holding member 140 inside the electromagnetic actuator (cylindrical portion 121 and cylindrical portion 131). The tip of the cylindrical portion 121 of the first pin-shaped terminal 120 reaches the first through hole inlet 111 through the first seal hole 151 of the seal member 150 and the first through hole 115 of the guide member 110, It is arranged so as to face the first notch 64 . The tip of the cylindrical portion 131 of the second pin-shaped terminal 130 reaches the second through hole inlet 112 through the second seal hole 152 of the seal member 150 and the second through hole 116 of the guide member 110, It is arranged so as to face the first notch 65 .

7, a guide member 210 having a shape different from that of the guide member 110 shown in FIG. 6 will be described. The first coil 90 and the second coil 100 wound around the fixed core 60 guide the ends of the coils when they enter the first pin-shaped terminal 120 and the second pin-shaped terminal 130. works for The guide member 110 is a guide member adapted to extend downward from notches ( 64 , 65 ) provided at both ends of the connecting bottom portion 63 of the fixed iron core 60 . That is, in the guide member 110, the inlets (the first through-hole inlet 111 and the second through-hole inlet 112) are arranged at positions corresponding to the notches (64, 65) provided at both ends of the connecting bottom portion 63 of the fixed core 60. It is The guide member 210 is a guide member corresponding to the case where the end of the first coil 90 and the end of the second coil 100 extend downward from one hole provided near the center of the connection bottom of the fixed iron core 60. . That is, in the guide member 210, the inlets (the first through-hole inlet 211 and the second through-hole inlet 212) extend to near the center and are open. The guide member 210 has a cylindrical shape and includes a first through hole 215 and a second through hole 216 . Each through-hole has an inlet (first through-hole inlet 211, second through-hole inlet 212), a tapered portion (first tapered portion 213, second tapered portion 214), and an outlet (first through-hole outlet 217, second 2 through-hole outlets 218). The wall surface from each through-hole entrance to the through-hole has a tapered shape, and the diameter gradually decreases from the through-hole entrance to the through-hole. The first through-hole outlet has an inner diameter that fits inside the cylindrical portion 121 of the first pin-shaped terminal 120 , and the second through-hole outlet fits inside the cylindrical portion 131 of the second pin-shaped terminal 130 . inside diameter.

The seal member 150 will be described with reference to FIGS. 8 and 9. FIG. Gas is filled by opening the gas passage 181 on the valve body 50 side, and the gas passes through the gaps between the first pin-shaped terminal 120 and the second pin-shaped terminal 130 and the fixed holder 20 and the holding member 140 . The sealing member 150 is used to prevent gas leakage to the outside. For this reason, the seal member 150 is made of a rubber material and formed in a disc shape having a diameter that closely fits the inner wall of the fixed holder 20 at the portion where the seal member 150 contacts. The seal member 150 has a first seal hole 151 through which the cylindrical portion 121 of the first pin-shaped terminal 120 is passed, and a second seal hole 152 through which the cylindrical portion 131 of the second pin-shaped terminal 130 is passed. The first seal hole 151 has a diameter that closely fits with the outside of the cylindrical portion 121 of the first pin-like terminal 120 , and the second seal hole 152 closely fits with the outside of the cylindrical portion 131 of the second pin-like terminal 130 . consists of a diameter.

Referring to FIG. 4, flange member 160 is made of a conductive metal material. The flange member 160 has circular holes 162 and 163 through which fastening screws are passed, one for each of the flange portions extending in two directions. In addition to circular holes, elliptical holes and elongated holes may be used.

[Assembly of electromagnetic actuator]
The electromagnetic actuator 1 is assembled in the following order.
(1) Assemble the movable iron core 30 , the biasing spring 40 , the valve body 50 and the spring receiving member 51 to the cylindrical case 10 .
(2) Insert-molding the first pin-shaped terminal 120 and the second pin-shaped terminal 130 into the holding member 140 .
(3) The sealing member 150 is fitted into the cylindrical portions (121, 131) of each pin-like terminal protruding from the holding member 140; Specifically, the cylindrical portion 121 of the first pin-shaped terminal is fitted into the first sealing hole 151 of the sealing member, and the cylindrical portion 131 of the second pin-shaped terminal 130 is fitted into the second sealing hole 152 of the sealing member.
(4) Place the guide member 110 on the seal member 150 . Specifically, the second pin is inserted into the second through hole outlet 118 of the guide member 110 so that the first through hole outlet 117 of the guide member 110 and the outside of the tip end of the tubular portion 121 of the first pin-shaped terminal 120 are fitted. The guide member 110 is placed so that the tip outside of the cylindrical portion 131 of the shaped terminal 130 is fitted.
(5) The fixed iron core 60 is fitted into the fixed holder 20 and caulked.
(6) Assemble the first coil 90 , the bobbin 70 and the second coil 100 to the fixed core 60 . Specifically, the one end side terminal member 81 of the bobbin is fitted into the gap between the fixed holder 20 and the first notch 64 of the fixed iron core 60 . In addition, the one end side extending portion 102 of the second coil is fitted into the gap between the fixed holder 20 and the second notch portion 65 of the fixed iron core 60 . The outer peripheral slope portion 22 of the fixed holder 20 and the other end side terminal member 82 of the bobbin 70 , and the outer peripheral slope portion 22 of the fixed holder 20 and the other end side 103 of the second coil 100 are electrically connected.
(7) Positioning the assembled holding member 140 , sealing member 150 and guide member 110 on the fixed holder 20 . Specifically, the one end side terminal member 81 of the bobbin faces the first through hole inlet 111 of the guide member, and the one end side extending portion 102 of the second coil is brought closer to face the second through hole inlet 112 of the guide member. .
(8) The one end side terminal member 81 of the bobbin is inserted into the cylindrical portion 121 of the first pin-shaped terminal 120 from the first through hole entrance 111 of the guide member, and the one end side extension portion 102 of the second coil is inserted into the guide member. The holding member 140, the seal member 150, and the guide member 110 are inserted into the cylindrical portion 131 of the second pin-shaped terminal 130 from the second through-hole inlet 112, and the holding member 140, the sealing member 150, and the guide member 110 are assembled to the fixed holder 20, and the holding member 140 and the fixed holder 20 are held. The member 140 is caulked.
(9) The bobbin one end side terminal member 81 and the tip of the pin-like terminal 120 and the one end side extending portion 102 of the second coil and the tip of the second pin-like terminal 130 are electrically connected.
(10) The connecting claws 17 of the tubular case 10 are snap-fitted into the tubular case engaging grooves 23 of the fixed holder 20 to assemble the tubular case 10 and the fixed holder 20 .
(11) Fit the flange member 160 into the fixed holder 20 . Although described based on the guide member 110, the guide member 210 can also be assembled by a similar assembly method.

[Composition of safety device for extinguishing of gas stove]
The electromagnetic actuator 1 according to the present invention is applied to, for example, a safety device 170 for a gas stove. A safety device 170 for a gas stove will be described with reference to FIG.

Referring to FIG. 9, a gas stove safety device 170 includes an electromagnetic actuator 1 and a thermocouple unit 190 detachably connected to the electromagnetic actuator 1 . The flange portion 27 of the electromagnetic actuator 1 is fitted into the gas cock body 180 of the gas stove, and the electromagnetic actuator 1 is screwed to the gas cock body 180 via the circular hole 162 of the flange member 160 . The electromagnetic actuator 1 is arranged so that its valve body 50 opens and closes the gas passage 181 . FIG. 9(a) shows an overall image in which the electromagnetic actuator 1 and the thermocouple unit 190 are attached to the gas cock body 180 of the gas stove. FIG. 9(b) shows a state immediately before the thermocouple unit 190 is fitted into the electromagnetic actuator 1. As shown in FIG.

The thermocouple unit 190 includes a female connector 191 connected to the electromagnetic actuator 1, a first cable 194 extending from a first female terminal 194a in the female connector 191, and a second cable 195 extending from a second female terminal 195a. , a thermocouple 197 connected to the second cable 195 and a third cable 196 extending from the thermocouple 197 .

The electromagnetic actuator 1 is connected with the thermocouple unit 190 . Specifically, the thermocouple unit engaging groove 29 of the fixed holder 20 and the electromagnetic actuator engaging convex portion 192 of the female connector 191 of the thermocouple unit 190 are fitted to connect the electromagnetic actuator 1 and the thermocouple unit 190 . . At that time, the first pin-like terminal 120 of the electromagnetic actuator 1 is connected to the first female terminal 194a of the female connector 191, and the second pin-like terminal 130 is connected to the second female terminal 195a of the female connector 191. be.

The first cable 194 has a connector 198 at its tip and is electrically connected to the dry battery 199 via the control board 200 . A second cable 195 is connected to a second female terminal 195 a and a thermocouple 197 . The thermocouple 197 has a heat-sensitive portion 197a at its tip, and the heat-sensitive portion 197a is exposed to the flame of the burner of the gas stove. The third cable 196 extends from the thermocouple 197 and has a connection terminal at its tip, which is screwed together with the flange member 160 of the electromagnetic actuator 1 to the gas cock body 180 .

The gas cock body 180 functions as the part connected to the reference potential (V1). The dry battery 199 is connected to the gas cock body 180 via the control board 200 . A connection terminal of the third cable 196 is connected to the same potential as the fixed holder 20 of the electromagnetic actuator 1 through the gas cock body 180 . Further, the reference potential (V1) varies in voltage such as a positive voltage, a negative voltage, and GND depending on the configuration of the device.

The valve body 50 is opened by the user's ignition operation, and the gas passage 181 is opened. The electromagnetic actuator 1 is timer-driven for a predetermined time when the gas stove is ignited, and keeps the valve body 50 in the open state to keep the gas passage 181 open. In addition, the electromagnetic actuator 1 maintains the valve body 50 in an open state and opens the gas passage 181 during steady-state combustion by a thermoelectromotive force generated when the heat-sensitive portion at the tip of the thermocouple 197 is heated by the flame of the burner of the gas stove. to maintain

That is, the electromagnetic actuator 1 maintains the valve body 50 in the valve open state by the electric power of the dry cell 199 when the gas stove is ignited, and keeps the valve body 50 in the valve open state by the thermoelectromotive force of the thermocouple unit 190 during steady combustion after ignition. It functions as a solenoid valve to maintain

The details of the operation of the safety device 170 for the gas stove are as follows. When ignition is performed by the igniter based on the ignition operation of the gas stove, the first coil 90 is energized by the power of the dry battery 199 based on the control signal from the control board, and electromagnetic force is generated. That is, the first coil 90 is used only for a predetermined time period during which the combustion is maintained quickly at the time of ignition, and the second coil 100 reaches a sufficient current for attracting the moving iron core. The valve body 50 is maintained in an open state by attracting the movable iron core 30 to the fixed iron core 60 by the generated electromagnetic force. Only at the time of ignition operation, the valve body 50 is moved to the valve open state by the driving force interlocked with the ignition operation.

When the gas flows through the gas passage 181 to the burner and is ignited, the heat sensitive portion 197a is heated by the flame and the thermocouple 197 generates a thermoelectromotive force. This thermoelectromotive force energizes the second coil 100 to generate an electromagnetic force, and the valve body 50 is maintained in the open state. The energization of the first coil 90 using the power of the dry battery 199 is cut off after a predetermined time has elapsed, and the valve body 50 is maintained in the open state only by the excitation effect of the energization of the second coil 100 during steady combustion.

When the flame of the gas stove is extinguished for some reason, the heating of the heat sensitive part of the thermocouple unit 190 is stopped and the thermoelectromotive force is extinguished. to close. This prevents the release of unburned gas.

1 electromagnetic actuator 10 cylindrical case (housing)
20 Fixed holder (housing)
30 Movable core 40 Biasing spring 50 Valve body 60 Fixed core 61 First arm 62 Second arm 63 Connection bottom 64 First notch 65 Second notch 70 Bobbin 81 One end terminal member 82 Other end terminal Member 90 First coil 100 Second coil 110 Guide member 120 First pin terminal
130 Second pin terminal 140 Holding member 150 Sealing member 160 Flange member 170 Safety device 180 Gas cock body 181 Gas passage 190 Thermocouple unit 194 First cable 195 Second cable 196 Third cable 197 Thermocouple 198 Connector 199 Dry battery 200 Control Substrate 210 Guide member 301 Electromagnetic actuator 378 Holding member 380 First pin-shaped terminal 382 Second pin-shaped terminal 385 Cylindrical portion 387 Cylindrical portion 390 O-ring 392 O-ring

Claims (6)

a movable iron core;
A fixed core including a first arm and a second arm arranged to face the movable core and having end faces facing the movable core, and a connecting bottom connecting the first arm and the second arm and,
a biasing spring that biases the movable core in a direction away from the fixed core;
a cylindrical case that movably supports the movable core;
a fixed holder that fixedly houses the fixed iron core and joins with the cylindrical case;
A first pin-shaped terminal and a second pin-shaped terminal fixed to the fixed holder via a holding member,
A first coil, one end of which is connected to the first pin-shaped terminal, is disposed around one or both of the first arm portion and the second arm portion of the fixed iron core,
A second coil, one end of which is connected to the second pin-shaped terminal, is disposed around one or both of the first arm portion and the second arm portion of the fixed iron core,
The connection bottom portion of the fixed core includes a hole or a notch through which one end of the first coil and one end of the second coil are inserted,
Both the first pin-shaped terminal and the second pin-shaped terminal are arranged to face the connection bottom,
one end of the first coil is connected to the first pin-shaped terminal;
one end of the second coil is connected to the second pin-shaped terminal;
a guide member that guides one end of the first coil to the first pin-shaped terminal and guides one end of the second coil to the second pin-shaped terminal;
An electromagnetic actuator comprising a sealing member for shielding a gap between the fixed holder, the holding member, the first pin-shaped terminal, and the second pin-shaped terminal at a position of the holding member in contact with the guide member. The first coil is arranged around a first arm,
2. The electromagnetic actuator according to claim 1, wherein the second coil is arranged around the first arm and around the second arm. The guide member is
a first through hole for guiding one end of the first coil to the first pin-shaped terminal;
A second through hole for guiding one end of the second coil to the second pin-shaped terminal,
The first through hole has a through hole inlet in which one end of the first coil comes out of the hole or notch and enters the through hole, and one end of the first coil comes out of the through hole and enters the first pin-like terminal. a through-hole exit;
2. The electromagnetic actuator according to claim 1, wherein the first through hole has a taper whose diameter gradually decreases from the through hole inlet toward the through hole outlet. 2. An electromagnetic actuator according to claim 1, wherein said guide member is a separate member independent of other members in said electromagnetic actuator. including a valve body that moves integrally with the movable core and opens and closes a fluid passage,
5. The electromagnetic actuator according to claim 1, wherein said fixed holder includes a male connector provided around said first pin-like terminal and said second pin-like terminal. A safety device for shutting off gas supply when a gas stove goes out,
an electromagnetic actuator according to claim 5;
a thermocouple unit including a female connector connected to the male connector of the electromagnetic actuator;
The thermocouple unit is
a first female terminal fitted to the first pin-shaped terminal of the electromagnetic actuator;
a second female terminal fitted to the second pin-shaped terminal of the electromagnetic actuator;
a first cable extending from the first female terminal to be connected to a dry battery;
a thermocouple;
a second cable connecting the second female terminal and the thermocouple;
An extinguishing safety device including a fixed holder and a third cable extending from said thermocouple to be connected to the same potential.

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