JP2006139956A - Sealed contact device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealed contact device, enabling simplification of its manufacturing process and reduction of its manufacturing cost, and having full bonding strength and air tightness. <P>SOLUTION: Members 11, 13 for contacts are composed of columnar shaft portions 19, 21, stretched portions 23, 25 annularly and radially stretching out at the back ends of the shaft portions 19, 21, and disc-like stationary side contacts 27, 29 bonded to the tips of the shaft portions 19, 21. Intermediate members 31, 33 are externally fitted to the periphery parts on the lower surface side of the stretched portions 23, 25. Ceramic side-projecting portions 35, 37 are formed on the upper surface of the top part 9 of a sealed vessel 7. Accordingly, the intermediate members 31, 33 are bonded and gas-sealed, by a bonding structure, comprising a metallized layer, an alloy layer, and a brazing material layer on the upper surfaces of the ceramic-side projecting portions 35, 37. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sealed contact device that can be used in, for example, a hybrid car and requires high bonding strength and airtightness.

  Conventionally, when airtightness is required in joining a ceramic member and a metal member, a method of forming a metallized layer by a refractory metal method (Telefunken method, Mo-Mn method) is generally used. ing.

  That is, a method is used in which a metallized layer is formed on the surface of a ceramic member by a refractory metal method, a plated layer is formed on the surface of the metallized layer, and the metal member is joined to the plated layer using a brazing material.

  In addition, in order to solve the problem at the time of baking metallization (that is, the problem of high firing costs due to the high temperature during baking, the problem of deformation of the ceramic itself, etc.) by the present inventors. A technique for reducing the baking temperature has been proposed (see Patent Document 1).

Furthermore, when molding a ceramic member (ceramic container) in the shape of a container, a process of producing a cube-shaped molded body and cutting and scraping the bottom surface has been employed.
JP 2001-342080 A (FIG. 1, page 2)

  Apart from this, in recent years, various sealed contact devices have been used as switch devices such as hybrid cars. This sealed contact device is an airtight switch device in which contacts are housed in an insulating container such as ceramic in order to prevent arc discharge at the contacts from affecting the surroundings.

  As a container for this type of sealed contact device, a ceramic member assembled with a metal member is known, and in this case, it is necessary to join the ceramic member and the metal member. Further improvement is desired in terms of simplification of the manufacturing process.

  The present invention has been made to solve the above-mentioned problems, and its object is to provide a sealed contact device that can simplify the manufacturing process, reduce the manufacturing cost, and has sufficient bonding strength and airtightness. There is to do.

  (1) The invention of claim 1 is a sealed contact device comprising a ceramic sealing container and a metal member joined to the sealing container, wherein the sealing container and the metal member are directly or As a joint structure for indirectly joining through a metal intermediate member, a metallized layer containing molybdenum and nickel or a metallized layer containing molybdenum, tungsten and nickel is provided on the ceramic surface of the sealing container, On the metallized layer, an alloy layer containing nickel and copper or manganese is provided, and a joining structure further comprising a brazing material layer joining the alloy layer and the metal member or the intermediate member is provided. The bonded metal member is a contact member having a contact in the sealed container.

  In the present invention, since Ni is contained in the metallized layer, sintering during baking is promoted, and sufficient sintering is possible even at a low temperature. As a result, it is possible to reduce the firing cost related to the structure of the furnace, the utility cost, the heat-resistant consumables, etc., as compared with the conventional case. Further, high dimensional accuracy can be obtained by baking at a low temperature. Furthermore, since sufficient sintering can be performed even at a low temperature, a high bonding strength can be ensured.

  In the present invention, since the alloy layer contains Cu and Mn in addition to Ni, the melting point decreases during baking, and a dense alloy layer can be formed. For this reason, it is possible to perform good brazing without the post-treatment such as Ni plating after baking. That is, the manufacturing process can be greatly simplified.

  In particular, in the present invention, the ceramic sealing container and the metal contact member are joined directly or indirectly through a metal intermediate member by the joining structure described above. Therefore, there is an advantage that the joint strength and airtightness of the joint portion in this joint structure are high, the manufacture thereof is easy, and the manufacturing cost can be reduced.

  (2) In the invention of claim 2, the contact member is arranged through a through-hole opened in the sealing container, and the joining structure causes the contact member to be placed outside the sealing container. It is characterized by being joined (directly or indirectly).

  In the present invention, since the contact member disposed through the sealing container is bonded to the outside of the sealing member, even if the contact member protrudes greatly from the sealing container, the bonding Work is very easy. As a result, a lead wire or the like can be easily connected to the rear end of the contact member that largely protrudes from the sealing container.

  (3) In the invention of claim 3, the contact member includes a shaft member that penetrates the through-hole of the sealing container, and an overhanging portion that projects radially from the shaft member outside the sealing container. The overhanging part and the sealing container are joined (directly or indirectly) by the joining structure.

The present invention exemplifies the configuration of the contact member, and there is an advantage that the joining work is further facilitated by joining the sealing container at the projecting portion.
(4) According to the invention of claim 4, a ceramic side convex portion is provided on the surface of the sealing container facing the overhanging portion, and the overhanging portion and the sealing container are provided at the ceramic side convex portion. It is characterized by being joined (directly or indirectly).

According to the present invention, since the joining structure is formed using the ceramic side convex portion, it is easy to limit the range of the joining structure, and thus there is an advantage that the workability of the joining work is improved.
(5) The invention of claim 5 includes the intermediate member between the overhanging portion and the sealing container, and the intermediate member and the sealing container are (directly) formed by the joining structure. It is characterized by being joined.

  In the present invention, the contact member and the sealing container are joined via a metal intermediate member. Thereby, there is an advantage that the structure of the rear end side (the projecting portion or the like) of the contact member can be simplified.

  (6) The invention of claim 6 comprises a metal-side convex portion on the surface of the overhanging portion facing the sealing container, and the metal-side convex portion and the sealing container are (directly) formed by the joining structure. In particular, it is characterized by being joined.

In the present invention, the contact member and the sealing container are directly joined. This has the advantage that it is not necessary to use a metal intermediate member.
(7) The invention of claim 7 is characterized in that the sealing container is a box-shaped container having a bottom surface side opening on a bottom surface side facing a top side to which the contact member is joined.

In this invention, since it has the bottom face side opening part in the bottom face side of a sealing container, members, such as various switches, can be assembled | attached easily using this bottom face side opening part.
(8) The invention of claim 8 is characterized in that a frame-like bottom side metal member (for example, a flange) is joined to the opening end of the bottom side opening of the sealed container by the joining structure. .

  In the present invention, since a frame-like flange, for example, is joined to the bottom surface side of the sealing container, the bottom surface side of the sealing container can be easily sealed by brazing, for example, a metal plate or the like to the flange. can do.

(9) The invention of claim 9 is characterized in that it includes a bottom-side closing member that closes the bottom-side opening, and the bottom-side closing member is joined to the bottom-side metal member.
This invention illustrates the structure which seals the bottom face side of a sealing container.

(10) The invention of claim 10 is characterized in that hydrogen is enclosed in the gas-sealed sealed contact device.
Since the sealed contact device of the present invention encloses hydrogen gas therein, there is an advantage of good thermal conductivity.

  (11) According to an eleventh aspect of the present invention, a pair of contacts for the contact member and conduction between the contacts are turned on / off inside the sealed container of the gas-sealed sealed contact device. The switch movable part to perform is provided.

The present invention exemplifies a configuration for turning on and off a switch.
(12) In the invention of claim 12, the switch movable portion moves the movable contact member 63 through the movable contact member that turns on and off the conduction between the two contacts and the bottom-side closing member. A shaft portion (for example, a push rod) is provided.

The present invention exemplifies the configuration of a movable part for turning on / off a switch.
(13) The invention of claim 13 is characterized in that the ceramic constituting the sealed container is made of an oxide ceramic containing alumina as a main component and a glass component.

The present invention exemplifies the material of the sealed container.
In addition, as an alumina, the thing of 50 to 99 weight% can be used, for example, A silica, a calcia, a magnesia, soda etc. are mentioned as a kind of glass component.

(14) The invention of claim 14 is characterized in that the sealed container is formed by powder molding.
Since the ceramic sealed container of the present invention is formed by pressing with a mold by so-called powder molding, the conventional cutting process can be omitted even if it is a box-shaped container. Therefore, the manufacturing process can be simplified and the manufacturing cost can be reduced.

  Next, an example (example) of the best mode of the sealed contact device of the present invention will be described.

  a) As shown in FIG. 1, the sealed contact device 1 of the present embodiment is a sealed type switch in which an arc disappears instantaneously when electrical conduction is turned on / off, and its gas-sealed substantially Hydrogen gas is sealed inside the rectangular parallelepiped container.

  As shown in FIG. 2 in an enlarged and broken view, the sealed contact device 1 is a substantially rectangular parallelepiped box having a bottom side (lower side in the figure) opened as a structure for accommodating a switch mechanism 2 that performs a switch operation. A main container 3 and a plate-like bottom side closing member 5 that closes the bottom side of the main container 3 are provided.

  As shown in FIG. 3, the main container 3 is disposed through a substantially rectangular parallelepiped ceramic sealing container 7 whose bottom surface (bottom surface opening 6) is open and a top 9 of the sealing container 7. A pair of contact members 11 and 13 and a bottom side metal member (flange) 14 joined to the opening end of the bottom side of the sealing container 7 are provided.

  Among these, the sealing container 7 is a substantially rectangular parallelepiped alumina box body whose bottom side is open, and a top portion 9 has a pair of circular through holes 15 into which the contact members 11 and 13 are inserted, 17 is formed.

  Further, the contact members 11 and 13 include columnar shaft portions 19 and 21 and projecting portions 23 and 25 that project annularly in the radial direction at the rear ends of the shaft portions 19 and 21 (above FIG. 2B). And disk-shaped fixed-side contacts 27 and 29 joined to the tips (downward in FIG. 2 (b)) of the shaft portions 19 and 21.

  The shaft portions 19 and 21 of the contact members 11 and 13 are inserted into the through holes 15 and 17 of the sealing container 7, and between the shaft portions 19 and 21 and the through holes 15 and 17. A slight gap is provided. The shaft portions 19 and 21 and the overhang portions 23 and 25 are integral members made of copper, and the fixed side contacts 27 and 29 are made of, for example, tungsten, copper-tungsten, copper-alumina, or copper-chromium.

  Further, as shown in an enlarged view in FIG. 4, an annular groove 30 is formed in the outer peripheral portion (corner portion) on the lower surface side of the overhang portions 23, 25. In this groove 30, for example, kovar, iron-nickel Cylindrical intermediate members 31 and 33 are externally fitted. And the intermediate members 31 and 33 are joined to the overhang | projection parts 23 and 25 with the silver raw material, and the part is gas-sealed.

On the other hand, on the top surface of the top portion 9 of the sealing container 7, ceramic side convex portions 35 and 37 projecting annularly toward the projecting portions 23 and 25 are formed.
Therefore, the intermediate members 31 and 33 are joined on the upper surfaces of the ceramic-side convex portions 35 and 37 by the following joining structure, and the portions are gas-sealed.

  That is, as further schematically shown in FIG. 5, the metallized layer 41 is formed between the ceramic-side convex portions 35 and 37 of the sealing container 7 and the intermediate members 31 and 33 from the sealing container 7 side. The alloy layer 43 and the brazing material layer 45 are laminated, and the sealing container 7 and the intermediate members 31 and 33 are joined and integrated by the joining structure of the plurality of layers, and the part is gas-sealed. .

As a result, the sealing container 7 and the contact members 11 and 13 are joined and integrated via the intermediate members 31 and 33 and gas-sealed.
The metallized layer 41 contains 71 to 88% by weight of Mo, 0.7 to 5.5% by weight of Ni, and 3 to 18% by weight of SiO ₂ in terms of oxide. Contains 36 to 61.3% by weight of Ni and 33 to 60% by weight of Cu (or 2 to 30% by weight of Mn). The brazing material layer 45 is made of a silver brazing material (for example, BAg-8).

  Therefore, as is clear from the following experimental examples, the bonding strength between the sealing container 7 and the intermediate members 31 and 33 is high and the airtightness is excellent. Moreover, since the brazing with the intermediate members 31 and 33 can be performed by the alloy layer 43 without performing the plating process or the like as in the prior art, the manufacturing process can be greatly simplified.

  Returning to FIG. 3, the flange 14 is a frame-shaped member obtained by processing a thin plate made of Kovar (or 42Ni—Fe), and protrudes outward from the rectangular cylindrical portion 51 and the cylindrical portion 51 vertically. The extension part 53 is comprised.

  As schematically shown in FIG. 6, the flange 14 has a joining structure (metallized layer 55, alloy layer 57, brazing material layer 59) similar to the above at the upper end (upper side of the figure) of the cylindrical portion 51. It is joined to the lower end surface of the sealing container 7 and gas-sealed.

  Further, as shown in FIG. 2, the bottom-side closing member 5 disposed so as to close the bottom-side opening 6 of the sealed contact device 1 is a plate-like member made of, for example, stainless steel, The extended portion 53 is joined by welding and gas-sealed.

  Further, in the sealed contact device 1, as a switch movable part (movable part) 60 of the switch mechanism 2, a push rod 61 that passes through the bottom side closing member 5 and is movable in the vertical direction in the figure, A movable contact member 63 that is disposed perpendicular to the push rod 61 and that can contact the fixed side contacts 27 and 29 of the contact members 11 and 13 is disposed.

  Specifically, the push rod 61 is provided with a step portion 65 at the boundary between the small-diameter upper portion and the large-diameter lower portion, and a plate-like movable contact member 63 is locked to the step portion 65 so as to move in the vertical direction. It is movable.

  The movable contact member 63 is a member that can move in the vertical direction, and has a two-layer structure in which plate materials 71 and 73 having different properties are laminated on the upper surface side and the lower surface side thereof. That is, the movable contact member 63 includes a metal plate material (conductive plate material) 71 having left and right convex movable contact points 67 and 69 on the upper surface side, and an insulating resin or the like on the lower surface side. A plate member 73 is provided, and is biased upward by a lower spring 75 and biased downward by an upper spring 77.

  Further, a lower container 79 through which the push rod 61 passes is disposed on the outer periphery of the lower portion of the push rod 61, and the gas is bonded to the push rod 61 and the bottom-side closing member 5 inside the lower container 79. A bellows 81 to be sealed is arranged.

  With this configuration, the movable contact member 63 moves up and down with the movement of the push rod 61, and the movable side contacts 67 and 69 come in contact with or away from the fixed side contacts 27 and 29. Can be performed.

b) Next, the manufacturing method of the sealing container 7 which is the principal part of a present Example and the formation method of joining structure are demonstrated.
(1) First, the alumina powder, the auxiliary raw material powder as the glass component, and the organic binder were put into a mill, and water was added to pulverize and prepare. The finished mud was spray-dried to obtain a powder for press molding.

(2) The powder for press molding was molded into a box-shaped sealed container 7 by molding with a multi-stage press.
(3) The molded body was fired at a firing temperature of 1300 to 1550 ° C. in an air atmosphere without cutting, to obtain a sealed container 7 as a ceramic fired body.

(4) On the other hand, a first mixture is prepared using Mo powder, Ni powder, and SiO ₂ powder, and the powder (for example, 87% by weight) of the first mixture is pulverized and mixed, and an organic binder such as ethyl cellulose (for example, 13 wt%) to prepare a first paste (first metallized ink).

  (5) Similarly, Ni powder, Cu powder, Mn powder, Ni-Cu alloy powder, Ni-Mn alloy powder are selected to create a second mixture, and the second mixture powder (for example, 87 wt%) was pulverized and mixed, and mixed with an organic binder such as ethyl cellulose (for example, 13 wt%) to prepare a second paste (second metallized ink).

  (6) Next, the first paste is applied to the surface of the ceramic-side convex portions 35 and 37 of the sealed container 7 which is a ceramic fired body, that is, the portion to which the intermediate members 31 and 33 are joined and the bottom surface. A first layer was formed by applying about 20 μm and drying (to be metallized layers 41 and 55 later).

  (7) Next, the second paste is applied to the surface of the first layer so as to cover the entire surface, and is dried by about 10 to 20 μm and dried (laterly becomes alloy layers 43 and 57). ) A second layer was formed.

(8) Next, the sealed container 7 on which the first layer and the second layer were formed was placed in a furnace and baked at a temperature of 1100 to 1200 ° C. in a reducing atmosphere and a dew point of 10 to 40 ° C.
Thereby, the metallized layers 41 and 55 and the alloy layers 43 and 57 were formed on the front and bottom surfaces of the ceramic-side convex portions 35 and 37 of the sealing container 7.

  (9) Next, the sealing container 7 and the intermediate members 31 and 33 are brazed, the intermediate members 31 and 33 and the contact members 11 and 13 are brazed, and the sealing container 7 and the flange 14 are further brazed. And put a low.

  Specifically, between the alloy layer 43 on the surface of the ceramic-side convex portions 35 and 37 of the sealing container 7 and the lower end surface of the intermediate members 31 and 33, the intermediate members 31 and 33 and the contact members 11 and 13. In the meantime, a silver brazing material (BAg-8) foil was placed between the alloy layer 57 at the open end of the sealed container 7 and the flange 14 and heated and cooled at a predetermined brazing temperature.

As a result, the main container 3 in which the contact members 11 and 13 and the flange 14 were joined to the sealing container 7 was obtained.
In addition, after that, members constituting various switches and the like are accommodated in the main container 3, and the bottom-side closing member 5 is joined to the flange 14 by welding in a state where hydrogen gas is sealed. 1 is completed.

c) Next, an experimental example performed to confirm the effect of this example will be described.
As a sample used in the experiment, a main container of the same sealed contact device was manufactured by the same manufacturing method as in the above-described example.

  Moreover, the main container of the sealed contact device of the comparative example was manufactured. Specifically, a Mo—Mn paste was applied to the surface of a ceramic sealing container, dried, baked at 1400 ° C. in a reducing atmosphere at a dew point of 40 ° C., and subjected to Ni plating. Thereafter, the intermediate member, the contact member, and the flange were brazed in the same manner to produce a sample of the comparative example. In addition, the manufacturing process of an Example and a comparative example is described in following Table 1.

(Experiment of bonding strength)
As shown in FIG. 7, the main container 91 is turned upside down and disposed between the support bases 93, and a load is applied downward to the tip of the contact member 95 by the metal rod 97. And the load when the sealing container 99 and the intermediate member 101 fracture | rupture was measured in multiple times (10 times). The results are shown in Table 2 below.

(Airtight experiment)
The inside of the sealed container was evacuated (1 × 10 ⁻⁹ Pam ³ / sec or less), and the outside was filled with helium to examine whether helium leaked. The results are shown in Table 2 below.

  In Table 1, “◯” indicates that the processing has been performed.

  As is apparent from Tables 1 and 2, the samples within the scope of the present invention (Sample Nos. 1 and 3) can be fired at a low firing temperature, and have sufficient hermeticity and bonding strength. Therefore, it is suitable as a sealed contact device.

  d) As described above, the sealed contact device 1 of the present embodiment has a ceramic sealing container 7 and metal intermediate members 31 and 33 (hence, metal contact members 11 and 13) by the joint structure described above. ) And the sealing container 7 and the flange 14 are joined.

Therefore, low-temperature baking is possible, the plating process can be omitted, and the sealing contact device 1 has sufficient hermeticity and bonding strength at low cost.
For example, as shown in FIG. 8, the sealed contact device 1 can be used as a switch member of an electric circuit in a hybrid car.

  In addition, in this embodiment, the box-shaped sealed container 7 can be manufactured by so-called powder molding and pressed by a mold, so that conventional cutting can be omitted. Therefore, the manufacturing process can be simplified and the manufacturing cost can be reduced.

  Further, in this embodiment, since the metallized layers 41 and 55 contain Ni, the sintering at the time of baking is promoted and sufficient sintering is possible even at a low temperature. As a result, it is possible to reduce the firing cost related to the furnace structure, the utility cost, the heat-resistant consumables, and the like as compared with the conventional case. Further, high dimensional accuracy can be obtained by baking at a low temperature. Furthermore, since sufficient sintering can be performed even at a low temperature, a high bonding strength can be ensured.

  The metallized layers 41 and 55 contain 71 to 88% by weight of molybdenum and 0.7 to 5.5% by weight of nickel. That is, since Ni in the metallized layers 41 and 55 is 0.7% by weight or more, it can be sufficiently sintered even at a low temperature. Further, since Ni is 5.5% by weight or less, Mo oversintering can be prevented, and insufficient bonding strength between the sealing container 7 and the metallized layers 41 and 55 can be prevented. Moreover, since 71 to 88% by weight of Mo is contained in the metallized layers 41 and 55, the metallized layers 41 and 55 are strong.

In addition, the metallized layers 41 and 55 contain 3.0 to 18.0% by weight of an oxide-converted silicon oxide component. That is, in this embodiment, since the metallized layers 41 and 55 contain 3.0 to 18.0% by weight of silicon oxide (SiO ₂ ) component, the bonding property between the sealing container 7 and the metallized layers 41 and 55 is extremely high. high.

  In the present embodiment, since the alloy layers 43 and 57 contain Cu and Mn in addition to Ni, the melting point is lowered during baking, and dense alloy layers 43 and 57 can be formed. For this reason, it is possible to perform good brazing without the post-treatment such as Ni plating after baking. That is, the manufacturing process can be greatly simplified.

  The alloy layers 43 and 57 contain 36 to 61.3% by weight of nickel, 33 to 60% by weight of copper, or 2 to 30% by weight of manganese. That is, since 36 to 61.3% by weight of Ni is contained in the alloy layers 43 and 57, the bonding strength and airtightness between the alloy layers 43 and 57 and the metallized layers 41 and 55 are high. Moreover, since Cu content is 33 weight% or more, it is excellent in the brazing property of the alloy layers 43 and 57, and high intensity | strength is obtained.

  And since Cu content is 60 weight% or less, it contributes to the improvement of the joint strength between the sealing container 7 and the metallization layers 41 and 55. FIG. On the other hand, since the Mn content is 2% by weight or more, the brazing properties of the alloy layers 43 and 57 are excellent and high strength can be obtained. In addition, since the Mn content is 30% by weight or less, it contributes to the improvement of the bonding strength between the sealing container 7 and the metallized layers 41 and 55.

Next, the second embodiment will be described, but the description of the same contents as the first embodiment will be omitted.
As shown in FIG. 9, the sealed contact device 111 according to the present embodiment does not use an intermediate member separate from the contact member 113, but the protruding portion 115 of the contact member 113 is formed from its lower surface side. An annular metal-side convex portion 117 similar to the intermediate member protrudes.

And the front-end | tip of this metal side convex part 117 and the surface of the ceramic side convex part 121 of the sealing container 119 are joined by the said junction structure.
Also according to the present embodiment, there are advantages that the same effects as those of the first embodiment are obtained and the brazing operation is simplified because the intermediate member is not used.

  In addition, this invention is not limited to the said Example at all, and it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from the summary of this invention.

1 is a perspective view showing a sealed contact device of Example 1. FIG. It is explanatory drawing which fractures | ruptures and shows the sealing contact apparatus of Example 1. FIG. The main container of the sealing contact apparatus of Example 1 is shown, (a) is the top view, (b) is AA sectional drawing of (a), (c) is BB sectional drawing of (a). is there. It is explanatory drawing which fractures | ruptures and shows the periphery of the intermediate member of the sealing contact apparatus of Example 1. FIG. It is sectional drawing which expands and shows typically the junction structure of the intermediate member of the sealing contact apparatus of Example 1. FIG. It is sectional drawing which expands and shows typically the joining structure of the flange of the sealing contact apparatus of Example 1. FIG. It is explanatory drawing which shows an experiment method. It is explanatory drawing which shows the use condition of the sealing contact apparatus of Example 1. FIG. It is sectional drawing which expands and shows the principal part of the sealing contact apparatus of Example 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,111 ... Sealing contact apparatus 3, 91 ... Main container 7, 99, 119 ... Ceramic sealing container 11, 13, 95, 113 ... Contact member 14 ... Bottom side metal member (flange)
31, 33, 101 ... Intermediate member 35, 37, 121 ... Ceramic side convex part 117 ... Metal side convex part 41, 55 ... Metallized layer 43, 57 ... Alloy layer 45, 59 ... Brazing material layer

Claims (14)

In a sealed contact device comprising a ceramic sealing container and a metal member joined to the sealing container,
As a joining structure for joining the sealing container and the metal member directly or indirectly via an intermediate member made of metal,
A metallized layer containing molybdenum and nickel or a metallized layer containing molybdenum and tungsten and nickel is provided on the ceramic surface of the sealing container, and an alloy layer containing nickel and copper or manganese is provided on the metallized layer. Further comprising a joining structure comprising a brazing material layer for joining the alloy layer and the metal member or the intermediate member,
The sealed contact device, wherein the metal member joined by the joining structure is a contact member having a contact in the sealed container.   The contact member is disposed through a through hole opened in the sealing container, and is joined to the sealing container on the outside of the sealing container by the joining structure. Item 2. The sealed contact device according to Item 1. The contact member includes a shaft member that penetrates the through hole of the sealing container, and an overhanging portion that protrudes radially from the shaft member outside the sealing container,
The sealed contact device according to claim 2, wherein the protruding portion and the sealing container are joined by the joining structure.   A ceramic-side convex portion is provided on a surface of the sealing container facing the protruding portion, and the protruding portion and the sealing container are joined by the ceramic-side convex portion. Item 4. The sealed contact device according to Item 3.   The said intermediate member is provided between the said overhang | projection part and the said sealing container, The said intermediate member and the said sealing container were joined by the said junction structure, The said Claim 3 or 4 characterized by the above-mentioned. The sealed contact device according to the description.   The metal protrusion is provided on a surface of the overhanging portion facing the sealing container, and the metal side protrusion and the sealing container are joined by the joining structure. Or the sealed contact device according to 4.   The said sealing container is a box-shaped container which has a bottom face side opening part in the bottom face side facing the top part side to which the said member for contacts is joined, The said Claim 1 characterized by the above-mentioned. Sealed contact device.   The sealing according to any one of claims 1 to 7, wherein a frame-like bottom side metal member is joined to the opening end of the bottom side opening of the sealing container by the joining structure. Contact device.   9. The sealed contact device according to claim 8, further comprising a bottom-side closing member that closes the bottom-side opening, and the bottom-side closing member is joined to the bottom-side metal member.   The sealed contact device according to claim 1, wherein hydrogen is sealed inside the sealed contact device that is gas-sealed.   Inside the sealing container of the sealed contact device that is gas-sealed, a contact of a pair of members for the contact and a switch movable portion that turns on and off the conduction between the contacts are provided. The sealed contact device according to claim 1, wherein the sealed contact device is characterized in that   The switch movable portion includes a movable contact member that turns on and off the conduction between the contacts, and a shaft portion that moves the movable contact member through the bottom-side closing member. The sealed contact device according to claim 11.   The sealed contact device according to any one of claims 1 to 12, wherein the ceramic constituting the sealed container is made of an oxide ceramic containing alumina as a main component and a glass component.   The sealed contact device according to claim 1, wherein the sealed container is formed by powder molding.

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