CN111678175B

CN111678175B - Electromagnetic actuator and flameout safety device

Info

Publication number: CN111678175B
Application number: CN201911154633.7A
Authority: CN
Inventors: 立野隆; 奥寺太一; 村上启人; 菅原利光
Original assignee: Mikuni Corp
Current assignee: Mikuni Corp
Priority date: 2019-03-11
Filing date: 2019-11-22
Publication date: 2024-10-22
Anticipated expiration: 2039-11-22
Also published as: JP2020148222A; JP7299718B2; ES2782302A1; ES2782302B2; CN111678175A

Abstract

The invention provides an electromagnetic actuator and a flameout safety device, which can realize the easiness and miniaturization of assembly operation on the premise that two coils are arranged on a fixed iron core. The electromagnetic actuator includes: a movable iron core (30); a fixed core (60) disposed opposite to the movable core and including a first notch (64) and a second notch (65); a biasing spring (40) for biasing the movable core in a direction away from the fixed core; cover bodies (10, 20) which support the movable iron core in a freely movable manner and fix and accommodate the fixed iron core; a first pin terminal (110) protruding from the cover body in opposition to the first notch portion; a second pin terminal (120) protruding from the cover body in opposition to the second notch portion; a first coil (90) wound around the fixed core, one end of which passes through the first notch and is connected to the first pin terminal; and a second coil (100) wound around the fixed core, one end of which passes through the second notch and is connected to the second pin terminal.

Description

Electromagnetic actuator and flameout safety device

Technical Field

The present invention relates to an electromagnetic actuator driven by electromagnetic force, and more particularly, to an electromagnetic actuator and a flameout safety device suitable for a flameout safety device of a gas range (gas stove) or the like.

Background

In a conventional gas range or the like, as an electromagnetic actuator of a flameout safety device, an electromagnetic actuator including the following components is known: a U-shaped fixed iron core arranged opposite to the movable iron core; a coil for excitation wound around the fixed core; a holder (holder) for fixing the fixed core; a cylindrical pin-shaped terminal mounted on the inner cylinder of the holder; and a cylindrical terminal fixed to the outer tube of the holder (for example, refer to patent document 1).

In the electromagnetic actuator, a coil is disposed in relation to a fixed core, and an elongated portion of one end side of the coil, which is linearly elongated, is guided into the pin-shaped terminal through a through hole penetrating the center of the fixed core, and is electrically connected to the tip end portion of the pin-shaped terminal.

In the conventional electromagnetic actuator, one coil and one pin terminal are used, but when two coils and two pin terminals are used, it is not easy to pass two extension portions on one end side of the two coils through the through hole of the fixed core, and thus there is a possibility that the assembly work is complicated, large-sized, or the like.

[ Prior Art literature ]

[ Patent literature ]

Patent document 1 Japanese patent laid-open publication No. 2014-75962

Disclosure of Invention

[ Problem to be solved by the invention ]

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electromagnetic actuator capable of facilitating assembly work, downsizing, and the like on the premise of providing two coils in a fixed core, and a flameout safety device using the electromagnetic actuator.

[ Means of solving the problems ]

The electromagnetic actuator of the present invention is formed as follows: it comprises the following steps: a movable iron core; a fixed iron core disposed opposite to the movable iron core and including a first notch and a second notch; a biasing spring for biasing the movable core in a direction away from the fixed core; a cover body for movably supporting the movable iron core and fixing and accommodating the fixed iron core; a first pin terminal disposed opposite to the first notch and protruding from the cover; a second pin terminal disposed opposite to the second notch and protruding from the cover; a first coil disposed around the fixed core, one end of which passes through the first notch and is connected to the first pin terminal; and a second coil disposed around the fixed core, one end of which passes through the second notch and is connected to the second pin terminal.

In the electromagnetic actuator, the following structure may be adopted: the fixed iron core includes: the first arm part and the second arm part respectively comprise end surfaces opposite to the movable iron core; and a connecting base connecting the first arm and the second arm; the first notch portion and the second notch portion are formed at the connecting bottom.

In the electromagnetic actuator, the following structure may be adopted: the cover body includes: a cylindrical housing that movably supports the movable core; and a fixing support which is connected with the cylindrical shell and fixes the fixed iron core.

In the electromagnetic actuator, the following structure may be adopted: the fixed support is formed of a conductive material, and the other end side of the first coil and the other end side of the second coil are connected to the fixed support.

In the electromagnetic actuator, the following structure may be adopted: the first coil is a thin wire and is disposed around the first arm via a bobbin (bobbin), and the second coil is a thick wire and is directly disposed around the second arm, and the wire diameter is larger than the first coil.

In the electromagnetic actuator, the following structure may be adopted: the bobbin includes a pressing portion that presses the second coil disposed around the second arm portion.

In the electromagnetic actuator, the following structure may be adopted: the bobbin includes: one end terminal member connected to one end of the first coil; and the other end side terminal member, connect the other end side of the first coil; one end side of the first coil is connected to the first pin terminal via one end side terminal member, and the other end side of the first coil is connected to the fixed mount via the other end side terminal member.

In the electromagnetic actuator, the following structure may be adopted: the bobbin includes: a first fitting groove for fitting and fixing the terminal member at one end; and a second fitting groove for fitting and fixing the other end side terminal member.

In the electromagnetic actuator, the following structure may be adopted: the first fitting groove and the second fitting groove are formed to open in the same direction in the bobbin.

In the electromagnetic actuator, the following structure may be adopted: the one-end-side terminal member includes a flat engaging portion that engages one end side of the first coil, and the other-end-side terminal member includes a flat engaging portion that engages the other end side of the first coil.

In the electromagnetic actuator, the following structure may be adopted: the fixed support includes: a first through hole through which the one-end terminal member passes; and a second through hole through which a linear extension portion defining one end side of the second coil passes.

In the electromagnetic actuator, the following structure may be adopted: the fixing support comprises a holding member formed by a resin material to hold the middle area of the first pin-shaped terminal and the second pin-shaped terminal, and the fixing support comprises a jogged concave part jogged with the holding member.

In the electromagnetic actuator, the following structure may be adopted: the fixed support includes: a first recess receiving the first pin terminal; and a second recess receiving the second pin terminal; a first sealing member is disposed between the first pin terminal and the first recess, and a second sealing member is disposed between the second pin terminal and the second recess.

In the electromagnetic actuator, the following structure may be adopted: comprises a flange (flange) member which is fitted and fixed to the fixing support and is formed of a conductive material.

In the electromagnetic actuator, the following structure may be adopted: comprising a valve body that moves integrally with a movable core and opens and closes a passage of fluid.

In the electromagnetic actuator, the following structure may be adopted: the mounting bracket includes a male connector defined about the first pin terminal and the second pin terminal.

The flameout safety device of the present invention is a flameout safety device that blocks the supply of fuel gas when a gas stove is flameout, and is configured as follows: it comprises the following steps: an electromagnetic actuator including the valve body and a male connector, and forming any one of the structures; and a thermocouple unit including a female connector connected with the male connector of the electromagnetic actuator.

In the flameout safety device, the following structure may be adopted: the thermocouple unit includes: a first female terminal fitted to the first pin terminal; a second female terminal fitted to the second pin terminal; a first cable extended from the first female terminal to be connected with the dry battery; a thermocouple; a second cable connecting the second female terminal with the thermocouple; and a third cable extending from the thermocouple to be connected to the fixed mount at the same potential.

[ Effect of the invention ]

According to the electromagnetic actuator and the flameout safety device having the above-described structure, the assembly work can be facilitated and reduced in size.

Drawings

Fig. 1 is a system diagram showing an embodiment of a gas cooker to which a flameout safety device including an electromagnetic actuator of the present invention is applied.

Fig. 2 is an external perspective view showing an electromagnetic actuator according to the present invention.

Fig. 3 is an external perspective view showing a thermocouple unit included in the flameout safety device of the present invention.

Fig. 4 is a cross-sectional view of the electromagnetic actuator shown in fig. 2, taken along a plane parallel to the axis.

Fig. 5 is a cross-sectional view through the axis of the electromagnetic actuator shown in fig. 2.

Fig. 6 is a perspective view of constituent parts of the cylindrical case and the flange member forming a part of the cover in the electromagnetic actuator shown in fig. 2, which have been removed.

Fig. 7 is a cross-sectional view through the axis of the component part shown in fig. 6.

Fig. 8 is an exploded perspective view of the component parts shown in fig. 6, as seen from the side of the bobbin.

Fig. 9 is an exploded perspective view of the component parts shown in fig. 6, as seen from the sides of the first pin terminal and the second pin terminal.

Fig. 10 is an exploded perspective view showing a bobbin included in the electromagnetic actuator shown in fig. 2, and a terminal member at one end and a terminal member at the other end fitted and attached to the bobbin.

Fig. 11 is a perspective view showing a state in which one end side terminal member, the other end side terminal member, and the first coil are assembled to a bobbin included in the electromagnetic actuator shown in fig. 2.

[ Description of symbols ]

A: electromagnetic actuator

U: thermocouple unit

M: flameout safety device

3: Dry cell

5: Female connector

5A: first female terminal

5B: second female terminal

6: First cable

7: Second cable

8: Thermocouple

9: Third cable

10: Cylindrical shell (cover)

20: Fixed support (cover)

24: First through hole

25: Second through hole

26: First concave part

27: Second concave part

28: Fitting recess

30: Movable iron core

40: Force spring

50: Valve body

60: Fixed iron core

61: A first arm part

61A: end face

62: A second arm part

62A: end face

63: Connecting bottom

64: First notch portion

65: Second notch portion

70: Winding tube

75: First jogged groove

76: Second jogging groove

81: One end terminal member

82: Terminal member on other end side

90: First coil

92: One end side

93: The other end side

100: Second coil

102: Straight extension (one end side)

103: Straight extension part (the other end side)

110: First pin terminal

120: Second pin terminal

130: Retaining member

140: O-ring (first sealing component, second sealing component)

150: Flange component

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The flameout safety device M of the present invention is applied to a gas range, for example, and includes an electromagnetic actuator a and a thermocouple unit U detachably connected to the electromagnetic actuator a, as shown in fig. 1.

The electromagnetic actuator a is attached to a gas cock body (gas cock body) 1 of a gas range, and a valve body 50 thereof is disposed so as to open and close a gas passage 1 a.

Here, the gas cock body 1 functions as a portion connected to a reference potential (ground).

In the flameout safety device M applied to a gas range, an electromagnetic actuator a connects a first cable 6 of a thermocouple unit U to a dry cell 3 via a control board 2, is driven at a timing only at a predetermined time at the time of ignition to maintain a valve body 50 in a valve-open state, opens a gas passage 1a, and a thermosensitive portion 8c located at the tip end of a thermocouple 8 of the thermocouple unit U maintains the valve body 50 in a valve-open state by a thermoelectric force (thermo-electromotive force) generated by heating of a flame 4 of a burner to open the gas passage 1a at the time of stable combustion.

That is, the electromagnetic actuator a functions as an electromagnetic valve, and maintains the valve body 50 in the valve-opened state by the electric power of the dry cell 3 at the time of ignition of the gas range, and maintains the valve body 50 in the valve-opened state by the thermoelectric force of the thermocouple unit U at the time of stable combustion after the ignition.

The dry cell 3 is connected to the negative electrode and the gas cock body 1 at the same potential (ground) via the control board 2.

As shown in fig. 3, the thermocouple unit U includes a female connector 5, a first female terminal 5a and a second female terminal 5b disposed in the female connector 5, a first cable 6 extending from the first female terminal 5a, a second cable 7 extending from the second female terminal 5b, a thermocouple 8, and a third cable 9 extending from the thermocouple 8.

The first cable 6 includes a connector 6a connected to the connector of the control board 2 at the front end thereof, and is electrically connected to the dry cell 3.

The second cable 7 is connected to the second female terminal 5b and the rod-shaped conductor 8a of the thermocouple 8.

The thermocouple 8 includes a rod-shaped conductor 8a and a tubular conductor 8b disposed outside the rod-shaped conductor 8 a. The rod-shaped conductor 8a is formed in a solid shape from an alloy material of Ni, cu, and Mn, for example. The tubular conductor 8b is formed in a multilayer cylindrical shape from an alloy material of Ni, cr, and Fe, for example.

The tip end region of the rod-shaped conductor 8a is joined to the tip end region of the tubular conductor 8b, and a thermosensitive portion 8c exposed to the flame 4 of the burner is formed.

The third cable 9 extends from the tubular conductor 8b of the thermocouple 8 and includes a connection terminal 9a at its tip. The connection terminal 9a is fastened to the gas cock body 1 by a screw together with the flange member 150 of the electromagnetic actuator a, and is connected to the fixed mount 20 of the electromagnetic actuator a at the same potential (ground) via the gas cock body 1.

As shown in fig. 2,4, and 5, the electromagnetic actuator a includes a cylindrical case 10 and a fixed mount 20 as a cover, a movable core 30, a biasing spring 40, a valve body 50, a fixed core 60, a bobbin 70, one end side terminal members 81 and the other end side terminal members 82 fitted in the bobbin 70, a first coil 90, a second coil 100, a first pin terminal 110, a second pin terminal 120, a holding member 130, O-rings 140 as a first seal member and a second seal member, and a flange member 150.

As shown in fig. 2, 4, and 5, the cylindrical case 10 is formed in a multi-layer cylindrical shape centered on the axis S, and includes a large-diameter portion 11, a small-diameter portion 12, a connecting claw portion 13 formed at an end of the large-diameter portion 11, a guide passage 14 formed in the small-diameter portion 12, and a spring support portion 15 formed at a boundary between the large-diameter portion 11 and the small-diameter portion 12.

The coupling claw portion 13 is engaged with an annular engagement groove 23 of the fixing bracket 20 by a snap fit (snap fit).

The guide passage 14 is formed as a cylindrical hole centered on the axis S, and guides the shaft 31 of the movable core 30 to be movable back and forth in the axis S direction.

The spring support 15 supports one end of the biasing spring 40.

The fixing base 20 is formed of a conductive material such as brass and has a multi-layer disc shape, and as shown in fig. 7 to 9, includes a fixing recess 21, an outer peripheral inclined surface portion 22, an annular engagement groove 23, a first through hole 24, a second through hole 25, a first recess 26, a second recess 27, an engagement recess 28, and an engagement portion 29 with a flange.

The fixing recess 21 has a bottomed cylindrical shape to receive and hold the coupling bottom 63 of the fixing core 60.

The outer peripheral inclined surface portion 22 is formed in a conical surface shape so as to electrically connect the other end side of the first coil 90 and the other end side of the second coil 100.

The first through hole 24 is formed in a cylindrical shape extending parallel to the axis S at a position facing the first notch 64 of the fixed core 60 on a straight line L1 parallel to the axis S so as to pass through the one-end-side terminal member 81 connected to the one end of the first coil 90.

The second through hole 25 is formed in a cylindrical shape extending parallel to the axis S at a position facing the second notch 65 of the fixed core 60 on a straight line L2 parallel to the axis S so that a straight-line extension 102 defining one end side of the second coil 100 passes through.

Here, the first through hole 24 and the second through hole 25 are formed to have the same inner diameter and the same length.

The first through hole 24 and the second through hole 25 may be formed as one large through hole, but the passage area can be reduced by forming them separately, and the sealing function can be improved by increasing the blocking wall of the gas entering from the valve body 50 side.

The first recess 26 is formed on a straight line L1 coaxial with the first through hole 24, and has a cylindrical shape elongated parallel to the axis S, and receives the inner end of the first pin terminal 110 with a gap.

The second recess 27 is formed on a straight line L2 coaxial with the second through hole 25, has a cylindrical shape extending parallel to the axis S, and receives the inner end of the second pin terminal 120 with a gap.

Here, the first concave portion 26 and the second concave portion 27 are formed to have the same inner diameter and the same depth dimension.

The first recess 26 and the second recess 27 may be formed as one large recess, but the passage area can be reduced by forming them separately, and the sealing function can be improved by increasing the blocking wall of the gas entering from the valve body 50 side.

The fitting recess 28 has a bottomed cylindrical shape centered on the axis S so as to fit the holding member 130. The outer peripheral edge of the fitting recess 28 is fitted with the holding member 130 and then crimped.

The flanged fitting portion 29 defines a flange portion 29a, a fitting portion 29b, a male connector 29c, and an annular groove 29d.

The flange portion 29a functions as follows: the flange member 150 fitted to the fitting portion 29b is positioned while being fitted to the gas cock body 1.

The fitting portion 29b functions as follows: the flange member 150 is fitted and fixed.

The male connector 29c is cylindrical with a step around the axis S, and is fitted to the female connector 5 of the thermocouple unit U.

An annular groove 29d is formed in a region adjacent to the flange portion 29a for attaching an O-ring for sealing when attached to the gas cock body 1.

The movable core 30 is formed in a substantially disc shape using a magnetic material having high magnetic permeability, and is supported by the tubular case 10 so as to be movable back and forth in the axial direction S via the shaft 31, as shown in fig. 4 and 5.

The shaft 31 is formed in a cylindrical shape from a metal material such as brass, is slidably supported by the guide passage 14 of the cylindrical case 10, has one end connected to the movable core 30 by caulking, and has the other end fitted to the valve body 50.

As shown in fig. 4 and 5, the biasing spring 40 is a compression coil spring (coil spring), one end of which abuts against the spring support portion 15 of the tubular case 10, and the other end of which abuts against the spring support member 51 adjacent to the valve body 50. The urging spring 40 urges the movable core 30 in a direction away from the fixed core 60 in the direction of the axis S.

The valve body 50 is formed in a substantially circular plate shape by using a rubber material or the like as shown in fig. 4 and 5, and is fitted and coupled to the other end side of the shaft 31 in a state where the spring support member 51 is disposed inside. The spring support member 51 is formed in a circular plate shape from a metal material or the like to support the other end portion of the urging spring 40.

The fixed core 60 is formed using a magnetic material having high magnetic permeability, as shown in fig. 6 to 9, in the following manner: the outer contour is cylindrical with the axis S as the center, has a U-shape as viewed from a direction perpendicular to the axis S, and includes 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 61 extends parallel to the axis S, and includes an end surface 61a facing the movable core 30 at its tip end, and holds the bobbin 70 around which the first coil 90 is wound.

The second arm 62 extends parallel to the axis S, and includes an end surface 62a facing the movable core 30 at its tip end, 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.

The connecting bottom 63 connects the first arm 61 and the second arm 62 to form a magnetic circuit, and is fitted into the fitting recess 21 of the fixing bracket 20.

The coupling bottom 63 is pressed by caulking of the outer peripheral edge of the fitting recess 21 in a state of being fitted into the fitting recess 21, so that the fixed core 60 is fixed to the fixed mount 20.

The first notch 64 is formed in a groove shape at one side of the coupling bottom 63, extends in the direction of a straight line L1 parallel to the axis S, and serves to pass through the one-end-side terminal member 81 connected to one end of the first coil 90.

The second notch 65 is formed in a groove shape at the other side of the connection bottom 63, and extends in the direction of a straight line L2 parallel to the axis S, and serves to pass through a straight line extension 102 defining one end side of the second coil 100.

The bobbin 70 is injection molded with a resin material, and includes, as shown in fig. 8 to 11, an engagement hole 71 for engaging the first arm 61 of the fixed core 60, a winding portion 72 for winding the first coil 90, a base 73, a pressing portion 74, a first engagement groove 75, and a second engagement groove 76.

As shown in fig. 6, the pressing portion 74 functions as follows: the coil portion 101 is pressed so that the second coil 100 disposed around the second arm portion 62 does not come off from the second arm portion 62.

The first fitting groove 75 is formed as a curved groove that opens on the side surface 73a of the base 73 so as to fit and fix the one-end-side terminal member 81.

The second fitting groove 76 is formed as a curved groove that opens to the side surface 73a of the base 73 so as to fit and fix the other end side terminal member 82.

Here, the first fitting groove 75 and the second fitting groove 76 are formed to open on the common side surface 73a, that is, to open in the same direction in the bobbin 70.

Therefore, the bobbin 70 can be easily released from the mold at the time of molding, and the one end side terminal member 81 and the other end side terminal member 82 can be fitted from the same direction, thereby simplifying the setting (setup) in the assembly operation and facilitating the assembly operation.

The one-end terminal member 81 is formed of a conductive material such as copper, and includes a fitting portion 81a, a flat joint portion 81b, and a linear extension portion 81c, as shown in fig. 10.

The fitting portion 81a has a curved shape to be closely fitted in the first fitting groove 75 of the bobbin 70.

The flat joint 81b forms a flat surface parallel to the side surface 73a of the bobbin 70 to electrically connect one end side 92 of the first coil 90 by pulse heat (pulse heat) joining or the like.

The linear extension 81c extends linearly in a direction of a straight line L1 parallel to the axis S, passes through the first notch 64 of the fixed core 60 and the first through hole 24 of the fixed mount 20, and is guided into the cylindrical first pin terminal 110. The distal end region of the linear extension 81c and the distal end region of the first pin terminal 110 are electrically connected by soldering.

The other end terminal member 82 is formed of a conductive material such as copper, and includes a fitting portion 82a, a flat joint portion 82b, and a linear extension portion 82c, as shown in fig. 10.

The fitting portion 82a has a curved shape to be closely fitted in the second fitting groove 76 of the bobbin 70.

The flat joint 82b forms a flat surface parallel to the side surface 73a of the bobbin 70 to electrically connect the other end side 93 of the first coil 90 by pulse heating joining or the like.

The linear extension 82c extends linearly while being inclined with respect to the axis S, and is welded to the outer Zhou Xie face 22 of the mount 20 as shown in fig. 6 and 7, and is electrically connected to the mount 20.

Here, instead of directly connecting the one end 92 and the other end 93 of the first coil 90 to the first pin terminal 110 and the mount 20, the one end terminal member 81 and the other end terminal member 82 are interposed therebetween, so that the ease of assembly work, the ease of welding work, the improvement of yield, and the like can be achieved. In particular, since the first coil 90 is a thin wire, the effect is remarkable.

Further, the first coil 90 is joined to the flat joint 81b and the flat joint 82b without being bundled at one end 92 and the other end 93, and therefore, the distance from the second coil 100 arranged opposite to each other in the direction perpendicular to the axis S can be shortened. This can reduce the size of the fixed core 60 and reduce the size of the entire electromagnetic actuator a.

The first coil 90 is a thin wire having a small wire diameter, and is made of a conductive material such as copper, and is configured to pass current of the dry cell 3.

The first coil 90 includes a coil portion 91 wound around the winding portion 72 of the bobbin 70, and one end side 92 and the other end side 93 extending from the coil portion 91.

One end side 92 extends along the base 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 73 a.

The other end 93 extends along the base 73 of the bobbin 70 and is electrically connected to the flat joint 82b of the other end terminal member 82 located on the side 73 a.

Here, since the first coil 90 is a thin wire, the resistance increases, and the life of the dry battery 3 can be prolonged.

The second coil 100 is made of a conductive material such as copper, and is a thick wire having a larger wire diameter than the first coil 90, and is configured to pass a current generated by the thermoelectric force of the thermocouple 8.

The second coil 100 includes: a coil portion 101 fitted around the second arm portion 62 of the fixed core 60; a linear extension 102 extending from the coil portion 101 to define one end side; and a linear extension 103 extending from the coil portion 101 to define the other end side.

The second coil 100 is preformed by an automatic forming machine or the like to define a coil portion 101, a linear extension portion 102, and a linear extension portion 103.

The linear extension 102 extends linearly in a direction of a straight line L2 parallel to the axis S, passes through the second notch 65 of the fixed core 60 and the second through hole 25 of the fixed mount 20, and is guided into the cylindrical second pin terminal 120. The distal end region of the linear extension 102 and the distal end region of the second pin terminal 120 are electrically connected by soldering.

The linear extension 103 extends linearly in a direction parallel to the axis S, and the front end region thereof extends linearly while being inclined with respect to the axis S, and is welded to the outer Zhou Xie face 22 of the mount 20 as shown in fig. 6, and is electrically connected to the mount 20.

Here, since the second coil 100 is a thick wire, the resistance becomes small, and even if the potential of the thermocouple 8 is small, the excitation action can be obtained to function as an electromagnet.

As shown in fig. 7 and 9, the first pin terminal 110 is formed in a cylindrical shape using a conductive metal material, and extends in the direction of a straight line L1 parallel to the axis S, and includes an inner cylindrical portion 111 disposed in the first recess 26, a flanged intermediate cylindrical portion 112 held by the holding member 130, and an outer cylindrical portion 113 protruding from the housing.

The first pin terminal 110 is disposed so as to face the first notch 64 of the fixed core 60 through the first through hole 24 on the straight line L1.

The first pin terminal 110 is formed by electrically joining the distal end region of the outer tube portion 113 and the distal end region of the linear extension 81c of the one-end terminal member 81 inserted along the straight line L1 by welding with the welding point W.

The second pin terminal 120 is made of a conductive metal material, is formed in a cylindrical shape, extends in a direction of a straight line L2 parallel to the axis S, and includes an inner cylindrical portion 121 disposed in the second recess 27, a flanged intermediate cylindrical portion 122 held by the holding member 130, and an outer cylindrical portion 123 protruding from the housing, as shown in fig. 7 and 9.

The second pin terminal 120 passes through the second through hole 25 on the straight line L2 and is disposed so as to face the second notch 65 of the fixed core 60.

The second pin terminal 120 is electrically joined by soldering with a soldering point W between the distal end region of the outer tube 123 and the distal end region of the linear extension 102 inserted along the straight line L2.

Here, the first pin terminal 110 and the second pin terminal 120 are formed such that the outside diameter of the inner cylinder 111 is the same as the outside diameter of the inner cylinder 121, and the outside diameter of the outer cylinder 113 is different from the outside diameter of the outer cylinder 123.

Accordingly, the two pin terminals can be identified by the difference in outer diameters of the outer cylinder 113 and the outer cylinder 123, and the same O-ring 140 can be used as the first seal member and the second seal member because the outer diameters of the inner cylinder 111 and the inner cylinder 121 are the same, and the cost can be reduced by sharing the components.

As shown in fig. 7 to 9, the holding member 130 is formed into a substantially cylindrical shape by insert molding (insert molding) in which the intermediate regions of the first pin terminal 110 and the second pin terminal 120 are embedded, using an electrically insulating resin material.

The holding member 130 is fitted into the fitting recess 28 of the fixing holder 20 and is swaged, so that the first pin terminal 110 is positioned and held on the straight line L1, and the second pin terminal 120 is positioned and held on the straight line L2.

The O-ring 140 is formed in an annular shape using a rubber material, and is fitted between the inner cylindrical portion 111 of the first pin terminal 110 and the first concave portion 26 and between the inner cylindrical portion 121 of the second pin terminal 120 and the second concave portion 27, respectively, when the holding member 130 holding the first pin terminal 110 and the second pin terminal 120 is assembled to the fixing base 20.

This can completely block the gas introduced from the valve body 50 from passing through the fitting recess 28 of the mount 20, and can improve the sealing function.

In particular, the O-ring 140 seals the members containing the metal material from each other, so that the air tightness is further improved.

The flange member 150 is a diamond-shaped flat plate formed by press-forming a conductive metal material, such as a steel plate, and is formed in an elongated shape as shown in fig. 2, 4, and 5, and includes a fitting hole 151 centered on the axis S, and two circular holes 152 through which fastening screws pass.

The flange member 150 is fitted to the fitting portion 29b of the mount 20, and is integrally fixed to the mount 20.

As described above, the flange member 150 is formed separately from the fixing base 20, so that a material cheaper than that of the fixing base 20 can be used, and can be appropriately set in accordance with the mounting shape of the gas cock body 1.

Next, an assembling operation of the electromagnetic actuator a will be described.

Before the work, a cylindrical case 10, in which the movable core 30, the biasing spring 40, the valve body 50, and the like are assembled in advance, the fixed mount 20, the fixed core 60, the bobbin 70, in which the one-end side terminal member 81 and the other-end side terminal member 82 and the first coil 90 are assembled in advance, the preformed second coil 100, the holding member 130, in which the first pin terminal 110 and the second pin terminal 120 are insert-molded, the two O-rings 140, and the flange member 150 are prepared.

Next, the two O-rings 140 are respectively fitted into the inner cylindrical portion 111 of the first pin terminal 110 and the inner cylindrical portion 121 of the second pin terminal 120.

Next, the holding member 130 is brought close to the fitting recess 28 of the mount 20, one of the O-rings 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 into the fitting recess 28.

The outer peripheral edge of the fitting recess 28 is swaged, and the holding member 130 is fixed to the fixing base 20.

Next, the fixed core 60 is brought close to the fixed mount 20 so that the first cutout 64 and the first through hole 24 are aligned on the straight line L1 and the second cutout 65 and the second through hole 25 are aligned on the straight line L2, and the coupling bottom 63 is fitted into the fixing recess 21.

Then, the outer peripheral edge portion of the fixing recess 21 is swaged, and the fixed core 60 is fixed to the fixing base 20.

Next, the second coil 100 is brought close to the fixed core 60 in the axis S direction, the coil portion 101 is fitted into the second arm portion 62, the linear extension 102 is inserted into the second pin terminal 120 through the second through hole 25 on the straight line L2, and the linear extension 103 is brought into contact with the outer Zhou Xie face 22.

Next, the bobbin 70 is fitted into the first arm portion 61 in the direction of the axis S while being brought close to the fixed core 60, the linear extension portion 81c of the one-end-side terminal member 81 is inserted into the first pin-shaped terminal 110 through the first through hole 24 on the straight line L1, and the linear extension portion 82c of the other-end-side terminal member 82 is brought into contact with the outer Zhou Xie face portion 22.

Next, the linear extension 82c and the linear extension 103 are welded to the outer Zhou Xie face 22 of the mount 20 in a state where the coil portion 101 of the second coil 100 is pressed by the pressing portion 74 of the bobbin 70.

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 fixing mount 20.

Next, the distal end region of the linear extension 81c and the distal end region of the outer tube portion 113 of the first pin terminal 110 are joined by welding with a welding point W to be electrically connected.

The distal end region of the linear extension 102 and the distal end region of the outer cylindrical portion 123 of the second pin terminal 120 are joined by welding with a welding point W to be electrically connected.

Then, the tubular housing 10 is assembled to the fixed mount 20 by bringing the tubular housing 10 closer to the fixed mount 20 in the axis S direction and by bringing the coupling claw portion 13 into slide-fit engagement with the annular engagement groove 23.

By the above, the assembly of the electromagnetic actuator a is completed. The above-described assembly procedure is an example, and other procedures may be adopted.

As described above, in the assembly work of the electromagnetic actuator a, the components are moved in the direction of the axis S to be assembled, and therefore, the assembly can be automatically performed on an automatic assembly line. This can improve productivity, yield, and manufacturing cost.

Further, the female connector 5 of the thermocouple unit U is connected to the male connector 29c of the electromagnetic actuator a, whereby the assembly of the flameout safety device M is completed.

Next, the operation of the flameout safety device M in the gas range will be described.

First, in the gas range, after ignition is performed by an igniter based on an ignition operation by an external operation knob (knob) or an operation button (button), the first coil 90 is energized by the electric power of the dry battery 3 based on a control signal from a control circuit of the control substrate 2 to generate electromagnetic force.

In addition, during the ignition operation, the valve body 50 is forced to move to the valve-open state by a driving force in conjunction with an operation knob, an operation button, or the like, and the valve body 50 is maintained in the valve-open state by the movable core 30 being attracted to the fixed core 60 by the electromagnetic force generated. Further, the driving force for moving the valve body 50 in the valve opening direction acts only at the time of the ignition operation.

Then, the gas flows into the burner through the gas passage 1a to be ignited, and the heat sensitive portion 8c is heated by the flame 4, and then the thermocouple 8 generates a thermoelectric force, and the second coil 100 is energized by the thermoelectric force to generate an electromagnetic force.

After a predetermined time has elapsed, the energization of the first coil 90 by the electric power of the dry cell 3 is cut off. Then, at the time of stable combustion, the valve opening state of the valve body 50 can be maintained only by the excitation action caused by the energization of the second coil 100.

That is, the first coil 90 is used only at a predetermined time at the time of ignition to quickly stabilize combustion.

On the other hand, when the flame of the gas range is extinguished due to blow-out, boiling-out, or the like, the heating of the thermosensitive portion 8c of the thermocouple unit U is stopped, the thermoelectric potential, that is, the electromagnetic force is eliminated, and the valve body 50 and the movable core 30 are pushed back by the biasing spring 40 to close the gas passage 1a. Thereby, the release of unburned gas is prevented.

As described above, according to the electromagnetic actuator a and the flameout safety device M, the assembly operation can be simplified, and automation, miniaturization, securing of air tightness, improvement of productivity, improvement of yield, and the like can be achieved.

In the above embodiment, the U-shaped fixed core 60 is disclosed as the fixed core, but the present invention is not limited to this, and any other form of fixed core may be used as long as it forms a magnetic circuit and includes a first notch portion through which one end side of the first coil passes and a second notch portion through which one end side of the second coil passes.

In the above embodiment, the first coil 90 is disposed on the first arm 61 and the second coil 100 is disposed on the second arm 62, but the present invention is not limited to this, and one end side (one end side terminal member) of the first coil may be disposed on one of the arms, or one of the coils may be disposed across both of the arms, as long as one end side (linear extension portion) of the second coil is disposed through the first notch and one end side (linear extension portion) of the first coil is disposed through the second notch.

In the above embodiment, the first coil 90 is disposed on the first arm 61 via the bobbin 70, but the present invention is not limited to this, and the following configuration may be adopted: the bobbin 70 and the one end side terminal member 81 and the other end side terminal member 82 are omitted, one end side of the first coil is directly connected to the first pin terminal, and the other end side of the first coil is directly connected to the fixing mount.

In the above embodiment, the electromagnetic actuator a was described as being applied as a part of the flameout safety device M, but the present invention is not limited to this, and the present invention can be applied to other electric devices and the like as long as the linear movement of the movable core is used as the driving force.

As described above, the electromagnetic actuator of the present invention can be used for, for example, a flameout safety device, and is useful for, for example, electrical equipment, mechanical parts, and other fields where miniaturization and improvement in assemblability are required, since the assembly work can be simplified, automation, miniaturization, air tightness can be ensured, productivity can be improved, and yield can be improved.

Claims

1. An electromagnetic actuator, comprising:

A movable iron core;

A fixed core, comprising: a first arm portion and a second arm portion each including an end surface facing the movable core; a connecting base connecting the first arm and the second arm; the first notch and the second notch are respectively formed on one side part and the other side part of the connecting bottom;

a biasing spring that biases the movable core in a direction away from the fixed core;

A cover body which movably supports the movable core and fixes and accommodates the fixed core;

A first pin terminal disposed opposite to the first notch portion and protruding from the cover;

A second pin terminal disposed opposite to the second notch portion and protruding from the cover;

A first coil disposed around the fixed core, one end of which passes through the first notch and is connected to the first pin terminal; and

And a second coil disposed around the fixed core, one end of which passes through the second notch and is connected to the second pin terminal.

2. The electromagnetic actuator of claim 1, wherein the electromagnetic actuator is configured to control the electromagnetic actuator,

The cover body includes: a cylindrical housing that movably supports the movable core; and a fixing support that connects the cylindrical case and fixes the fixed core.

3. The electromagnetic actuator of claim 2, wherein the electromagnetic actuator is configured to move the actuator,

The fixing support is formed of a conductive material,

The other end side of the first coil and the other end side of the second coil are connected with the fixed support.

4. The electromagnetic actuator of claim 3 wherein the electromagnetic actuator is configured to move the actuator,

The first coil is a thin wire and is disposed around the first arm portion via a bobbin,

The second coil is a thick wire and is directly arranged around the second arm, and the wire diameter is larger than that of the first coil.

5. The electromagnetic actuator of claim 4, wherein the electromagnetic actuator is configured to move the actuator,

The bobbin includes a pressing portion that presses the second coil disposed around the second arm portion.

6. The electromagnetic actuator of claim 4 or 5, wherein the electromagnetic actuator is configured to control the electromagnetic actuator,

The bobbin includes: an end terminal member connected to an end of the first coil; and another end side terminal member, connect another end side of the said first coil;

One end side of the first coil is connected to the first pin terminal via the one end side terminal member,

The other end side of the first coil is connected to the fixed mount via the other end side terminal member.

7. The electromagnetic actuator of claim 6, wherein the electromagnetic actuator is configured to move the actuator,

The bobbin includes: a first fitting groove for fitting and fixing the one-end-side terminal member; and a second fitting groove for fitting and fixing the other end side terminal member.

8. The electromagnetic actuator of claim 7, wherein the electromagnetic actuator is configured to move the actuator,

The first fitting groove and the second fitting groove are formed to open in the same direction in the bobbin.

9. The electromagnetic actuator of claim 6, wherein the electromagnetic actuator is configured to move the actuator,

The one-end-side terminal member includes a flat engaging portion engaging one end side of the first coil,

The other end side terminal member includes a flat engaging portion that engages the other end side of the first coil.

10. The electromagnetic actuator of claim 6, wherein the electromagnetic actuator is configured to move the actuator,

The fixed support includes: a first through hole through which the one-end-side terminal member passes; and a second through hole through which a linear extension portion defining one end side of the second coil passes.

11. The electromagnetic actuator of claim 10, comprising:

A holding member formed of a resin material to hold intermediate regions of the first pin terminal and the second pin terminal; and

The fixing support includes a fitting recess in which the holding member is fitted.

12. The electromagnetic actuator of claim 11, wherein the electromagnetic actuator is configured to move the actuator,

The fixed support includes: a first recess receiving the first pin terminal; and a second recess receiving the second pin terminal;

a first sealing member is disposed between the first pin terminal and the first recess,

A second sealing member is disposed between the second pin terminal and the second recess.

13. The electromagnetic actuator according to any one of claims 2 to 5, comprising:

And a flange member fitted and fixed to the fixing base and formed of a conductive material.

14. The electromagnetic actuator according to any one of claims 2 to 5, comprising:

and a valve body that moves integrally with the movable core and opens and closes a fluid passage.

15. The electromagnetic actuator of claim 14, wherein the electromagnetic actuator is configured to move the actuator,

The mounting bracket includes a male connector defined about the first pin terminal and the second pin terminal.

16. A flameout safety device that blocks a supply of gas when a gas range is flameout, the flameout safety device characterized by comprising:

The electromagnetic actuator of claim 15; and

A thermocouple unit including a female connector connected with the male connector of the electromagnetic actuator.

17. The flameout safety device according to claim 16, wherein,

The thermocouple unit includes: a first female terminal fitted to the first pin terminal; a second female terminal fitted to the second pin terminal; a first cable extended from the first female terminal to be connected with a dry battery; a thermocouple; a second cable connecting the second female terminal with the thermocouple; and a third cable extending from the thermocouple to be connected at the same potential as the fixed mount.