JP3107288B2 - Sealed contact device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed contact device suitable for a relay for power load, an electromagnetic switch, and the like.

[0002]

2. Description of the Related Art Conventionally, as this kind of sealed contact device, there is a device disclosed in Japanese Patent Publication No. 6-506316. This material, as shown in FIG. 15, the sealed container A of insulating material, fixed to the terminal B which is hermetically bonded to the sealed container A which fixed contact B _1, movable toward or away from the fixed contact B ₁ Contact C ₁
Contact disk (movable contact) C with integrated
A movable iron core D that moves so that the contacts B ₁ and C ₁ move toward and away from each other is fixed on the bottom F ₁ side, and a fixed iron core E that regulates the position in opposition to the movable iron core D is stored on the opening F ₂ side. With a bottomed cylinder part F,
A first joining member G made of a metallic material, which is fixedly attached to the fixed iron core E and hermetically joined to the bottomed cylindrical portion F, and is hermetically joined to the sealing container A and the first joining member G, thereby forming two contacts. A second joining member J made of a metal material forming an airtight space H for accommodating B ₁ , C ₁ and both iron cores D, E; a movable shaft K connected to the movable iron core D; A return spring L that urges the movable iron core D in the separating direction, a contact pressure spring M that urges the movable contact disk C in the contact contact direction, and a contact spring M that contacts the movable shaft K so that the movable contact disk C is connected to the movable shaft K. It includes a sealing contact portion P having a holding member N for holding the pressure spring M in a compressed suspension state, and a driving portion Q for driving the movable iron core D to move.

More specifically, the movable iron core D is connected and fixed to the movable shaft K without adjusting the axial position of the movable shaft K. Further, the holding member N is compressed and suspended between the movable contact disk C and the movable contact disk washer S inserted through the movable shaft K while being in contact with the movable contact disk C, so that the contact pressure spring
Holding M

[0004]

In the above-described conventional sealed contact device, the movable iron core D is connected and fixed to the movable shaft K without adjusting the position of the movable shaft K in the axial direction. to have, when there is dimensional error or assembly error of the components, the amount of displacement of the movable contact C ₁ after the contact with the fixed contact B _1, i.e. can not be adjusted overtravel, Ya contact pressure There has been a risk that the distance between the contacts tends to vary, and the contact switching performance may become unstable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sealed contact device having stable contact opening / closing performance.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, an object of the present invention is to provide a sealed container made of an insulating material, a fixed terminal provided with a fixed contact, and hermetically bonded to the sealed container. A movable contact provided with a movable contact that comes in contact with and separates from the fixed contact, and a movable iron core that moves so that the contact comes and goes on the bottom side is fixed on the opening side. And a first joining member made of a metal material to which a fixed iron core is fixed and hermetically joined to the bottomed cylinder portion, and a gas mainly composed of hydrogen or hydrogen is hermetically sealed. A second joining member made of a metal material, which is hermetically joined to the sealing container and the first joining member so as to form an airtight space for accommodating both contacts and both iron cores, and a movable iron core. A movable shaft to be connected, a return spring that urges the movable iron core in the contact separation direction, and a contact abutment A contact contact spring having a contact pressure spring for urging the movable contact in a direction, and a holding member for holding the contact pressure spring in a compressed suspension state so that the movable contact is connected to the movable shaft; A drive unit for driving and moving the iron core, wherein the position adjusting means for changing the connection position of the movable shaft and the movable iron core along the axial direction of the movable shaft is provided. Wherein the holding member is provided in the sealed container.
Is provided with an opposing surface opposing the inner surface of the
The projecting dimension which is almost equal to the gap dimension with the inner surface of the sealed container
It has a configuration provided with a protruding portion .

According to a second aspect of the present invention, in the first aspect, the movable iron core is provided with a sliding surface that slides on an inner surface of the bottomed cylindrical portion. The sliding surface is provided with grooves extending over both ends in the movable direction.

According to a third aspect of the present invention, in the first aspect, the movable shaft is made of an insulating material.

According to a fourth aspect of the present invention, in the first aspect, the second joining member is formed in a tubular shape by providing a bent portion around the middle of the tubular portion. is there.

According to a fifth aspect of the present invention, in the first aspect, the second joining member is formed in a cylindrical shape by providing a local thin part around the cylindrical portion. It has a configuration.

According to a sixth aspect of the present invention, in the first aspect, the second joining member is formed in a cylindrical shape having openings at both ends. One end is opened at one end side, and a joining portion which is air-tightly joined to an opening end of the box-shaped sealing container is provided, and an inner peripheral edge of the opening at the one end is inside the sealing container. It is configured to be located inside from the direction.

[0012]

According to a seventh aspect of the present invention, in the first aspect, the contact pressure spring is coil-shaped,
The holding member has a configuration in which a first suspension portion that suspends one end of the contact pressure spring via the movable contact and a second suspension portion that suspends the other end of the contact pressure spring are provided. It is.

According to an eighth aspect of the present invention, in the first aspect, the fixed terminal protrudes from an outer surface of a housing provided to accommodate the sealing contact portion and the driving portion, and connects the fixed terminal. And a fitting means for fitting the terminal plate and the housing to each other.

According to a ninth aspect of the present invention, in the first aspect, the bottomed tubular portion has a tubular portion and a bottom portion hermetically joined to the tubular portion.

Further, what is described in claim 10 is what is claimed in claim 9.
In the device described above, the cylindrical portion is made of a magnetic material made of a magnetic material which is positioned between a yoke provided in the driving portion and the movable iron core so as to form a magnetic circuit together with the two iron cores and hermetically joins the bottom portion. A first cylindrical portion and a second cylindrical portion made of a non-magnetic material that is hermetically bonded to a bonding surface of the first cylindrical portion opposite to the bottom portion, the bonding surface being The movable iron core is located on the bottom side with respect to the surface facing the fixed iron core.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This sealed contact device includes a sealed contact portion AA, a drive portion BB, and a housing CC.

First, the sealing contact portion AA will be described. Reference numeral 1 denotes a sealed container, which is formed in a box shape with one side opened by a heat-resistant material such as ceramic, and has through holes 1a at two locations on the bottom thereof. Reference numeral 2 denotes a fixed terminal, which is formed, for example, of a copper-based material into a substantially multi-stage bottomed cylindrical shape.A fixed contact 2a is fixed to one end on the bottom side, and a flange 2c is provided on the other end on the opening side. It is provided. The fixed contact 2a is a fixed terminal
2 may be provided integrally. The fixed terminal 2 is hermetically joined to the sealing container 1 in the vicinity of the flange 2c by brazing or the like, with the other end protruding from the sealing container 1. The fixed terminal 2 has a thread groove 2b formed inward from the opening side.

Reference numeral 3 denotes a movable contact, which is formed in a plate shape from, for example, a copper-based material or the like, and has movable contacts 3a fixed to both ends thereof at intervals so as to be in contact with and separated from the fixed contact 2a. The movable contact 3a may be provided integrally with the movable contact 3. Reference numeral 4 denotes a movable shaft, which is formed of an insulating material into a substantially round bar shape, and one end 4a is inserted into an insertion hole 3b provided in the center of the movable contact 3. The movable shaft 4 has a thread groove 4c at the other end 4b.

5 is a movable contact holder (holding member),
A contact pressure spring 6 to be described later is held in a compressed suspension state so that the movable contact 3 is connected to the movable shaft 4.
It has a substantially U-shaped cross section including 5a and both opposing pieces 5b, 5b. The compression suspension state of the contact pressure spring 6 will be described later in detail. The center piece 5a is provided with an insertion hole 5c at the center thereof, through which one end 4a of the movable shaft 4 is inserted. In addition, the opposing pieces 5b, 5b are provided with extending pieces 5d, 5d extending in a direction approaching each other from the center of the tip, and furthermore, the extending pieces 5d,
Projection pieces 5e, 5e are provided to protrude from the tips of d, 5d toward the center piece 5a. Also, this movable contact holder 5
The outer surfaces of both opposing pieces 5b, 5b are opposing surfaces 5f, 5f opposing the inner surface of the sealed container 1, and the opposing surfaces 5f, 5f have a gap dimension with the inner surface of the sealed container 1. R-shaped protrusions 5g, 5g having substantially equal protrusion dimensions are provided. Reference numeral 6 denotes a contact pressure spring, which is formed in a coil shape and held in the movable contact holder 5. This contact pressure spring 6 has two contacts
The movable contact 3 is urged in the contact direction of 2a and 3a.

Reference numeral 7 denotes a fixed iron core, one end 7a of which is formed in a thick and substantially cylindrical shape, and an insertion hole 7b through which the movable shaft 4 is inserted is provided in the axial direction. This fixed iron core 7 is inserted into an insertion hole 11a of a first joint member 11 to be described later, and has one end 7a fixed thereto, and the other end has a recess having an inner diameter larger than the inner diameter of the insertion hole 7b.
7c is provided.

Reference numeral 8 denotes a movable iron core, which is movable so that the two contacts 2a and 3a come into contact with and separate from each other. The movable iron core 8 is formed in a substantially cylindrical shape, and has an insertion hole 8a through which the movable shaft 4 is inserted. . In the insertion hole 8a, together with the screw groove 4c of the movable shaft 4, a screw groove 8b which constitutes a position adjusting means 20 for making the connection position between the movable shaft 4 and the movable iron core 8 variable along the axial direction of the movable shaft 4 Is cut off. The adjusting procedure by the position adjusting means 20 will be described later in detail. The movable iron core 8 has a face 8c facing the fixed iron core 7 at one end in the axial direction, and a recess 8d having a larger inner diameter than the inner diameter of the screw groove 8b is provided at the other end. ing. Also, this movable iron core 8
The outer surface is a sliding surface 8e that slides on the inner peripheral surface of the bottomed cylindrical portion 10 described later, and the sliding surface 8e is provided with a groove 8f at both ends in the movable direction at one position. I have. The grooves 8f may be provided at a plurality of locations.

Reference numeral 9 denotes a return spring which urges the movable iron core 8 in the direction in which the two contacts 2a, 3a are separated from each other. The return spring 9 has an inner diameter slightly larger than the inner diameter of the insertion hole 7b of the fixed iron core 7. The movable shaft 4 is formed in a shape, and is inserted through the insertion hole 7b of the fixed iron core 7.
, One end of which is fitted into the concave portion 7c of the fixed iron core 7 to regulate the position.

Reference numeral 10 denotes a bottomed cylindrical portion made of a non-magnetic material.
The movable core 8 is formed on the bottom 10b side, and the fixed core 7 facing the opposing surface 8c of the movable core 8 is stored in the opening 10c side.

Reference numeral 11 denotes a first joining member which is formed in a rectangular shape by a magnetic metal material such as iron, and has a fixed core 7 and a movable core.
Together with 8 form a magnetic circuit. This first joining member is
As described above, the insertion hole 11a through which the fixed iron core 7 is inserted before the one end 7a is fixed is provided at the center. The first joint member 11 has a bottomed cylindrical portion 10 near the insertion hole 11a.
Airtightly joined.

Reference numeral 12 denotes a second joining member, which is made of a metal material.
It is formed in a cylindrical shape having opening holes 12a at both ends, and the inner peripheral edge of the opening hole 12a on one end side is located inside the inner surface of the sealed container 1. The second joint member 12 has a first joint portion 12b hermetically joined to the open end 1b of the sealed container 1 at one end thereof, and an airtight joint to the first joint member 11 at the other end. A second joint 12c is provided. The second joining member 12 has a bent portion 12d provided in the middle of the cylindrical portion, and extends from the first joining portion 12b to the second joining portion.
The thinner portion 12e is provided so as to gradually decrease in thickness from 12c to 12c, and the opening section of the opening hole 12a is formed larger at the other end side than at the one end side. The second joint member 12 is air-tightly joined to the above-described sealed container 1 and the first joint member 11 so that both contact points are formed.
An airtight space 30 for accommodating 2a, 3a and both iron cores 7, 8 is formed, and this airtight space 30 is hermetically sealed with a gas mainly composed of hydrogen, for example, at about 2 atm.

Next, based on FIG. 3 and FIG.
The compression suspension state of No. 6 will be described. First, the movable contact 3a
The movable contact 3 is fitted into the movable contact holder 5 with the cable facing the insertion hole 5c. Next, the contact pressure spring 6 is fitted into the movable contact holder 5 while being compressed by a predetermined amount. Specifically, one end of the contact pressure spring 6 is suspended on the central piece 5a of the movable contact holder 5 via the movable contact 3, and the other end is connected to the protruding pieces 5e, 5e of the movable contact holder 5. It is locked and suspended on the extension pieces 5d, 5d. That is, the movable contact holder 5 has a central piece 5a serving as a first suspension part 5h for suspending one end 6a of the contact pressure spring 6 via the movable contact 3, and the extended pieces 5d, 5d The second for suspending the other end 6b of the contact pressure spring 6
Suspension portions 5j, 5j. Then, the movable shaft 4 is inserted through the contact pressure spring 6 and the insertion hole 3b of the movable contact 3 from one end 4a thereof, and then is inserted into the insertion hole 5c of the movable contact holder 5, and the movable shaft 4 is moved near the insertion hole 5c. To fix.

The magnetic means (not shown) comprises a permanent magnet and a magnetic member sandwiching the permanent magnet, and the magnetic member is attached to the outer surface of the sealed container 1 so as to sandwich the fixed contact 2a and the movable contact 3a. Therefore, the magnetic means applies a magnetic field in a direction perpendicular to the operation direction of the movable contact 3a to the space where the two contacts 2a, 3a exist.

Next, the driving section BB will be described. This drive BB
Are fixed iron core 7, movable iron core 8, and first joint member 11
Together with the electromagnet device. A coil 13 is wound around a coil frame 14. Reference numeral 15 denotes a yoke, which includes a yoke main body 15a and a bush 15b, and forms a magnetic circuit together with the fixed iron core 7, the movable iron core 8, and the first joint member 11. The yoke main body 15a is formed in a U-shape with a central piece and both opposing pieces so as to surround the coil 13, and a through hole is formed in the central piece.
15c is provided. The bush 15b is formed in a cylindrical shape, and is inserted into a through hole 15c of the yoke main body 15a. In a state where the yoke main body 15a and the bush 15b are arranged, the above-described tubular portion 10a of the bottomed tubular portion 10 is located between the bush 15b of the yoke 15 and the movable iron core 8.

Next, the housing CC will be described. This accommodates both the sealing contact portion AA and the driving portion BB. This housing CC has an insertion hole through which the fixed terminal 2 is inserted.
A flange 2 c of the fixed terminal 2 inserted through the insertion hole 16 projects from the outer surface 17. Then, the protruding fixed terminal 2 is connected to a terminal plate 18 for electric wire connection. Specifically, the terminal plate 18 is formed in a substantially plate shape, and at one end thereof, an insertion hole 18a for inserting a screw to be screwed into the screw groove 2b of the fixed terminal 2 so as to fix the fixed terminal 2 is provided at the other end. Is provided with a screw hole 18b for connecting an electric wire, and a stepped portion 18c is provided at the center. And this housing CC
The recess 19 forming the fitting means 40 is provided on the outer surface 17 together with the step 18c of the terminal plate 18.

Next, an adjustment procedure by the position adjustment means 20 will be described. First, the movable iron core 8 is inserted into the thread groove 4c of the other end 4b of the movable shaft 4 through which the return spring 9 is inserted.
Movable shaft 4 and movable iron core by screwing in with 8b
The position of connection with the movable shaft 8 is adjusted along the axial direction of the movable shaft 4, and the movable iron core 7 and the movable shaft 4 are fixed from the concave portion 8d side with an adhesive or the like. Then, after covering the movable iron core 8 with the bottomed cylindrical portion 10 which is air-tightly joined to the first joining member 11 in advance, the fixed iron core 7 is inserted through the insertion hole 11a of the first joining member 11, One end 7a of the fixed iron core 7 is fixed near the insertion hole 11a.

Next, the operation of this embodiment will be described with reference to FIG. Before the coil 13 is excited, the movable contact 3a is a fixed contact.
2a and faces a contact gap L ₁ and. coil
When the magnet 13 is excited, the movable core 8 is attracted to the fixed core 7 and moves, so that the movable shaft 4 which is screwed to the movable core 8 and later fixed by the adhesive is driven, and the movable contact 3a is Yuki gradually reduced contact gap L _1, the spring load of the return spring 9 is changed from the point P to point Q, it abuts the fixed contact 2a. Thereafter, as shown in the point R, the spring load of the contact pressure spring 6 is suddenly increased, further when the movable shaft 4 is driven, the movable contact 3a is to overtravel L ₂ weight movable, the point from point R The spring load on S further increases. The above total contact gap L ₁ and overtravel L ₂ was has a stroke L ₃ of the movable contact 3a.

When the excitation of the coil 13 is turned off, the movable contact 3 is returned mainly by the urging forces of the contact pressure spring 6 and the return spring 9, and is moved from the point S to the point Q via the point R to the point Q. As the movable contact 3a is separated from the fixed contact 2a, the movable core 8 also returns by a predetermined distance, returns to the original state, and returns to the point P. Then, the arc generated between the contacts at the time of the return is sufficiently extended toward both ends of the movable contact 3 by the magnetic field of the magnetic means (not shown) and extinguished.

In such a sealed contact device, the movable iron core
8 can adjust the connection position with the movable shaft 4 along the axial direction of the movable shaft 4 by the position adjusting means 20, so that when there is a dimensional error or an assembly error of a part, the fixed contact 2a is contacted. the amount of displacement of the movable contact 3a after, that can adjust the overtravel L ₂ amount, and the variation becomes smaller the distance between the contact pressure and the contact, and thus contact switching performance can be stabilized.

Also, when the movable iron core 8 moves, the gas mainly composed of hermetically sealed hydrogen flows smoothly along the groove 8f provided on the sliding surface 8e of the movable iron core 8. In addition, the operation of moving the movable contact 3a toward and away from the fixed contact 2a also becomes smooth, and the contact opening / closing performance is further stabilized.

The arc EE generated when the contacts are separated is
As shown in FIG. 7, even when the first joint member 11 made of a metal material is touched, it does not jump to the movable shaft 4 made of an insulating material via the fixed iron core 7 or the like. Therefore, the movable shaft 4 is not damaged, the mobility of the movable shaft 4 is not reduced, and the contact switching performance is further stabilized.

The second joining member 12 made of a metal material is
When heated by brazing or welding and airtightly joined,
As shown in FIG. 8 (a), when airtightly joined by brazing to a sealing container 1 made of ceramic or the like having a smaller coefficient of thermal expansion than a metal material, it shrinks at the time of cooling and the one end opening and the like are curved. Even if it receives such stress, the mechanical strength is improved by providing a bent part 12d around the middle of the cylindrical part, so that it becomes difficult to bend as shown in FIG. Therefore, the amount of overtravel affecting the contact opening / closing speed is stabilized, and the contact opening / closing performance is further stabilized.

The second joining member 12 made of a metal material is
When heated by brazing or welding and airtightly joined,
As shown in FIG. 8 (a), particularly when the first joint member 11 made of a metal material having a high coefficient of thermal expansion is air-tightly joined, it is subjected to stress such that it contracts during cooling and the other end opening and the like are curved. However, as the thin-walled portion 12e provided in the middle of the cylinder deforms, the stress is absorbed, and the entire body is hardly deformed as shown in FIG. overtravel L ₂ amount that affects the rate will be stable, further, has assumed that the contact switching performance is stabilized.

The arc EE generated when the contacts are separated is
As shown in FIG. 9, even if the second joint member 12 made of a metal material is touched, the inner peripheral edge of the electric field strength which is located inside the inner surface of the sealed container 1 and has a high electric field strength. As a result, the first joint 12b, which is hermetically joined to the sealed container 1, is not damaged, and the contact switching performance is further stabilized.

Further, even if the movable contact 3 rotates around the movable shaft 4, the movable contact holder 5
The protrusions 5g, 5g provided on the facing surfaces 5f, 5f of the
Because of the contact with the inner surface, excessive rotation is prevented, the movable state becomes smooth, and the contact opening / closing performance is further stabilized.

The movable contact holder 5 is provided at the other end 6b.
Is one end of a coil-shaped contact pressure spring 6 suspended by another member.
By suspending only the contact pressure spring 6a via the movable contact 3, the contact pressure spring 6 is not held in a compressed suspension state.
Of the contact pressure spring 6 via the movable contact 3
6a and the second suspension portions 5j, 5j
Since the coil-shaped contact pressure spring 6 is held in a compressed suspension state by suspending the other end portions 6b of the contact pressure spring 6, a separate member for suspending the other end portion 6b of the contact pressure spring 6 is unnecessary, and the components are not required. The score can be reduced.

Since the terminal plate 18 connected to the fixed terminal 2 protruding from the outer surface 17 of the housing CC is fitted to the housing CC by the fitting means 40, an electric wire or the like is connected to the terminal plate 18 by screwing. In this case, the screwing torque is not directly applied to the fixed terminal 2, and there is no fear of deformation of the fixed terminal 2 or poor airtightness, and the contact switching performance is further stabilized.

Next, a second embodiment of the present invention will be described with reference to FIGS.
This will be described below based on FIG. The members having substantially the same functions as those in the first embodiment are denoted by the same reference numerals,
Only different points from the first embodiment will be described. In the first embodiment, the bottomed tubular portion 10 has the tubular portion 10a and the bottom portion 10b integrated from the beginning, whereas in the present embodiment, the tubular portion 10a and the bottom portion 10b, which are separate members, are hermetically joined. It has a configuration.

More specifically, the movable iron core 8 is not provided with a groove 8f on its sliding surface 8e, and is provided with a positioning groove 8g for positioning a tool such as a driver at the other end corner.

In such a sealed contact device, the movable iron core
When the movable member 8 moves, the gas mainly composed of hydrogen, which is hermetically sealed, flows smoothly along the groove 8f provided on the sliding surface 8e of the movable core 8 so that the movable contact 3a contacts the fixed contact 2a. No. 1 except for the effect of smooth release operation
In addition to the effects of the embodiment, the movable iron core 8 can be used even after the bottomed cylindrical portion 10 is already mounted, as shown in FIG.
After removing the bottom portion 10b before airtight joining from 10 and positioning a tool such as a screwdriver in the positioning groove 8g for the adjustment, the connecting position with the movable shaft 4 is adjusted by the position adjusting means 20. After adjusting along the axial direction,
As shown in FIG. 7, since the bottom portion 10b may be hermetically bonded, the adjustment accuracy can be improved and the adjustment can be performed more easily.

Next, a third embodiment of the present invention will be described with reference to FIGS.
This will be described below based on No. 14. The members having substantially the same functions as those of the second embodiment are denoted by the same reference numerals,
Only different points from the second embodiment will be described. In the second embodiment, the cylindrical portion 10a of the bottomed cylindrical portion 10 is a single member, whereas in the present embodiment, the first cylindrical portion 10d made of a magnetic material and hermetically bonded to the bottom portion and the first cylindrical portion are hermetically bonded. A second non-magnetic material made of a non-magnetic material is hermetically joined to a joining surface 10e of the cylindrical portion 10d opposite to the bottom 10b.
Of the cylindrical portion 10f.

More specifically, the joining surface 10e of the first cylindrical portion 10d
Is lower than the surface 8c of the movable iron core 8 facing the fixed iron core 7,
It is located on the b side.

In such a sealed contact device, in addition to the effect of the second embodiment, the yoke 15 and the movable iron core 8 provided on the drive section BB so as to form a magnetic circuit together with the two iron cores 7 and 8 are provided. A first cylindrical portion made of a magnetic material that hermetically joins the bottom portion 10b
Since 10d is located, the magnetic gap between the yoke 15 and the movable iron core 8 can be eliminated, the magnetic efficiency can be increased, and the contact switching performance can be further stabilized.

In the first to third embodiments, the movable shaft
4 is made of an insulating material, but, for example, when the number of contact contact / separation is small and the arc EE generated at the time of contact opening jumps to the movable shaft 4 and is not so much damaged,
It is not necessary to be made of an insulating material, and in that case, the degree of freedom of design can be increased.

Further, in the first to third embodiments, the second joining member 12 is formed in a cylindrical shape by being provided around the bent portion 12d in the middle of the cylindrical portion. When it is formed of meat and has relatively high mechanical strength, it does not have to be provided around the bent portion 12d in the middle of the tubular portion to be formed in a tubular shape. Processing becomes easier.

In the first to third embodiments, the second joining member 12 is formed in a tubular shape by providing a thin portion 12e around the tubular portion. At the time of cooling, even if stress is applied to shrink and bend, when the stress is relatively small, it is not necessary to provide a thin portion 12e around the cylindrical portion and form it in a cylindrical shape. Processing of the second joining member 12 becomes easier.

In the first to third embodiments, the second joining member 12 is connected to the first joining portion 12b to the second joining portion 12c.
The thinner portion 12e is provided to be gradually turned to be gradually thinned, but the same effect can be obtained even if a locally thinned thinned portion 12e is provided to be turned.

In the first to third embodiments, the second joint member 12 is configured such that the inner peripheral edge of the opening hole 12a at one end is located inside the inner surface of the sealed container 1. However, for example, when the number of contact contact / separation is small and the arc EE generated at the time of contact disconnection does not damage the first joint portion 12b so much, such a configuration is not necessary. The degree of freedom in designing the second joining member 12 can be increased.

[0054]

In the first to third embodiments, the movable contact holder 5 is configured such that one end 6a of the contact pressure spring 6 is
3 and a second suspension portion 5j, 5j for suspending the other end 6b of the contact pressure spring 6 are provided. For example, if the number of parts is large, When it does not hinder assembly, etc., only the first suspension portion 5h may be provided, and another member for suspending the other end portion 6b of the contact pressure spring 6 may be provided. Therefore, the processing of the contact holder 5 becomes easier.

In the first to third embodiments, the terminal plate
Although the fitting means 40 for fitting the 18 and the housing CC is provided, for example, when connecting the terminal board 18 by caulking an electric wire or the like, the fitting means 40 may not be provided,
In that case, the processing of the housing CC becomes easier.

[0057]

According to the first aspect of the present invention, since the movable iron core can adjust the connection position with the movable shaft along the axial direction of the movable shaft by the position adjusting means, the dimensional error and the assembly error of the parts are reduced. If there is, the amount of displacement of the movable contact after contact with the fixed contact, that is, the amount of overtravel can be adjusted, the contact pressure and the distance between the contacts are reduced, and the contact switching performance is stabilized. be able to.
In addition, the movable contact should not rotate around the movable axis.
Even if there is, the protrusion provided on the opposite surface of the holding member
Prevents excessive rotation due to contact with inner surface of sealed container
And the movable state becomes smooth, and the contacts
The effect that the opening and closing performance can be stabilized
Can be played.

According to a second aspect of the present invention, when the movable iron core is driven and moved, the airtightly sealed hydrogen or hydrogen is mainly formed along the groove provided on the sliding surface of the movable iron core. Since the flowing gas flows smoothly, the operation of moving and moving the movable contact to and from the fixed contact also becomes smooth, and the contact opening / closing performance can be more stabilized than that of the first aspect.

According to the third aspect of the present invention, even if the arc generated at the time of opening the contact may touch the first or second joining member made of a metal material, the movable shaft made of an insulating material may be used. Since it does not jump, there is no damage to the movable shaft, and the mobility of the movable shaft does not decrease. As a result, the contact switching performance is more stable than that of the first embodiment. Can be done.

According to a fourth aspect of the present invention, there is provided a second material made of a metallic material.
If the joining members are heated when they are hermetically joined,
Even when subjected to stress such that it contracts and curves during cooling, it is difficult to bend because the mechanical strength is improved by providing a bent part around the cylinder part, and assembling accuracy is improved because the mechanical strength is improved. The overtravel amount affecting the switching speed is stabilized, and the contact switching performance can be further stabilized as compared with the first embodiment.

According to a fifth aspect of the present invention, a second material made of a metallic material is provided.
If the joining members are heated when they are hermetically joined,
Even if stress is applied so that it shrinks and bends when cooled, the local thin-walled part provided around the cylinder deforms, absorbing the stress and making it difficult for the whole to deform, improving assembly accuracy. Therefore, the amount of overtravel affecting the contact opening / closing speed is stabilized, and the contact opening / closing performance can be further stabilized as compared with the first embodiment.

According to a sixth aspect of the present invention, the arc generated when the contacts are separated may be located inside the inner surface of the sealed container even if the arc may touch the second joining member made of a metal material. The inner peripheral edge having a high electric field strength as described above does not damage the joint to be hermetically joined to the sealed container, and further stabilizes the contact opening / closing performance more than the one described in claim 1. Can be done.

[0063]

According to a seventh aspect of the present invention, in addition to the effect of the first aspect, the holding member has a movable contact with only one end of a coil-shaped contact pressure spring whose other end is suspended by another member. Instead of holding the contact pressure spring in a compression suspension state by suspending the contact pressure spring in a suspended state, a first suspension suspends one end of the contact pressure spring via a movable contact and a second suspension. Suspends the other end of the contact pressure spring in a compressed suspension state by suspending the other end of the contact pressure spring, thereby eliminating the need for a separate member for suspending the other end of the contact pressure spring, The score can be reduced.

According to the eighth aspect of the present invention, since the terminal plate connected to the fixed terminal protruding from the outer surface of the housing is fitted to the housing by the fitting means, an electric wire or the like is connected to the terminal plate by screwing. In this case, the torque of the screwing is not directly applied to the fixed terminal, and there is no possibility that the fixed terminal is deformed or the airtightness is poor. As a result, the contact opening / closing performance can be more stabilized than that of the first embodiment. .

According to a ninth aspect of the present invention, even after the movable iron core has already been attached to the bottomed tubular portion, the movable iron core can be removed by the position adjusting means by removing the bottom portion before being hermetically joined from the bottomed tubular portion.
Since the connection position with the movable shaft can be adjusted along the axial direction of the movable shaft, the adjustment accuracy can be improved as compared with the first embodiment.

According to a tenth aspect of the present invention, a first cylinder made of a magnetic material is hermetically joined to a bottom between a movable iron core and a yoke provided in a driving portion so as to form a magnetic circuit together with both iron cores. Since the portion is located, the magnetic gap between the yoke and the movable iron core can be eliminated, the magnetic efficiency can be increased, and the contact opening / closing performance can be more stabilized than that of the ninth aspect . be able to.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a state in which the movable shaft is inserted.

FIG. 3 is an exploded perspective view showing an assembled state around a movable contact holder.

FIG. 4 is a sectional view showing a state in which a movable contact holder holds a contact pressure spring.

FIG. 5 is a perspective view showing a fitting means between the surrounding member and the terminal plate.

FIG. 6 is an explanatory diagram of a relationship between a stroke of a movable shaft and a spring load of a contact pressure spring.

FIG. 7 is a cross-sectional view showing a state where the arc has touched the first joining member.

FIG. 8 is a cross-sectional view showing a state where the second bonding member is hermetically bonded.

FIG. 9 is a cross-sectional view showing an arc between the second bonding member and the fixed contact according to the first embodiment.

FIG. 10 is a perspective view of a bottomed cylindrical portion according to a second embodiment of the present invention.

FIG. 11 is a perspective view of the movable iron core.

FIG. 12 is a cross-sectional view showing a state where the bottom is attached to the cylindrical part of the bottomed cylindrical part according to the first embodiment.

FIG. 13 is a perspective view of a bottomed cylindrical portion according to a third embodiment of the present invention.

FIG. 14 is a cross-sectional view of the vicinity of the bottomed cylindrical portion of the above.

FIG. 15 is a sectional view of a conventional example.

[Explanation of symbols]

 1 Sealed container 1b Open end 2 Fixed terminal 2a Fixed contact 3 Movable contact 3a Movable contact 4 Movable shaft 5 Movable contact holder (holding member) 5f Opposite surface 5g Projection 5h First suspension 5j Second suspension Part 6 Contact pressure spring 6a One end 6b Other end 7 Fixed iron core 8 Movable iron core 8c Opposite surface 8e Sliding surface 8f Groove 9 Return spring 10 Bottom tube 10a Tube 10b Bottom 10c Open 10d First tube Part 10e Joint surface 10f Second cylindrical part 11 First joint member 12 Second joint member 12a Opening hole 12b First joint part 12d Bent part 12e Thin part 15 Yoke 17 Outer surface 18 Terminal plate 20 Position adjusting means 30 Airtight space 40 Mating means AA Sealed contact BB Drive CC housing

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor: Teruhiro Ito 1048, Kazuma, Kadoma, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) Inventor: Kiyoshi Goto 1048, Kazuma, Kazuma, Kadoma, Osaka Prefecture, Japan: ) Inventor Ritsu Yamamoto 1048 Kazuma Kadoma, Kadoma City, Osaka Prefecture Inside (72) Inventor Takehiko Toguchi 1048 Kadoma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Works, Ltd. (56) References JP-A 7-122149 ( JP, A) JP-A-4-163812 (JP, A) JP-A-57-154112 (JP, U) JP-A-61-169935 (JP, U) JP-A-60-53141 (JP, U) Hei 4-18974 (JP, U) Jiko 2-12577 (JP, Y1) Special table Hei 6-506316 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 50 / 54 H01H 1/66

Claims (10)

(57) [Claims] 1. A sealed container made of an insulating material, a fixed terminal provided with a fixed contact and hermetically bonded to the sealed container, a movable contact provided with a movable contact coming into contact with and separating from the fixed contact, A fixed iron core is fixed to the opening side, and a fixed iron core is fixed to the bottom side, and a fixed iron core is fixed to the bottom side. A first joining member made of a metal material hermetically joined to the portion, a sealing container and a first container so that hydrogen or a gas mainly composed of hydrogen is hermetically sealed.
A second joining member made of a metal material forming an air-tight space for accommodating both contacts and both iron cores by being air-tightly joined to the joining member, a movable shaft connected to the movable iron core, and a contact opening. A return spring that urges the movable iron core in the separating direction, a contact pressure spring that urges the movable contact in the contact contact direction, and a compression suspension state in which the contact pressure spring is connected to the movable shaft so that the movable contact is connected to the movable shaft. And a driving unit that drives and moves the movable iron core, wherein a connection position between the movable shaft and the movable iron core is provided. Is provided along the axial direction of the movable shaft, and the holding member is provided with a facing surface facing the inner surface of the sealed container, and the facing surface of the sealed container is provided on the facing surface. A protrusion having a protrusion dimension substantially equal to the gap dimension with respect to the inner surface is provided. Sealed contact device. 2. The movable iron core is provided with a sliding surface that slides on the inner peripheral surface of the bottomed cylindrical portion, and the sliding surface is provided with grooves extending at both ends in the movable direction. The sealed contact device according to claim 1, wherein 3. The sealed contact device according to claim 1, wherein the movable shaft is made of an insulating material. 4. The sealed contact device according to claim 1, wherein the second joining member is formed in a tubular shape by providing a bent portion around the tubular portion. 5. The sealed contact device according to claim 1, wherein the second joining member is formed in a tubular shape by providing a local thin portion around the tubular portion. 6. The second joining member is formed in a cylindrical shape having opening holes at both ends, and is formed in a box shape with one opening at one end thereof. A joint portion which is hermetically joined to an open end of the sealed container is provided, and an inner peripheral edge of an opening hole on one end side is located inside an inner surface of the sealed container. Item 2. The sealed contact device according to Item 1. 7. The contact pressure spring has a coil shape, and the holding member suspends one end of the contact pressure spring via the movable contact and the other end of the contact pressure spring. 2. The sealed contact device according to claim 1, further comprising a second suspension section for suspending the section. 8. The fixed terminal protrudes from an outer surface of a housing provided to accommodate the sealed contact portion and the driving portion, and is connected to a terminal plate for electric wire connection. 2. The sealed contact device according to claim 1, further comprising a fitting means for fitting the housing and the housing. 9. The sealed contact device according to claim 1, wherein the bottomed cylindrical portion has a cylindrical portion and a bottom portion hermetically joined to the cylindrical portion. 10. A magnetic material made of a magnetic material which is located between a yoke provided in the drive section and the movable iron core so as to form a magnetic circuit together with the two iron cores and hermetically joins the bottom portion. A first cylindrical portion and a second cylindrical portion made of a non-magnetic material that is hermetically bonded to a bonding surface of the first cylindrical portion opposite to the bottom portion, the bonding surface being The sealed contact device according to claim 9, wherein the movable iron core is located on the bottom side with respect to a surface facing the fixed iron core.