JPH10162674A - Sealed switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the contact reliability of contacts of a sealed relay, a sealed switch, etc. SOLUTION: This switchgear is so constituted as to closely seal contact parts 1 in a housing 4. In this case, the inside of the housing 4 is kept in atmosphere of a lubricating agent of 2-ethyl-3 hydroxy-4-pyrone. The agent 2-ethyl-3- hydroxy-4-pyrone is adsorbed on the surfaces of the contact parts 1 prior to organic gas molecules to cover the surfaces of the contact parts 1 with a film of the lubricating agent molecules and prevent adhesion of organic gas molecules to the surfaces of the contact parts 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed switch such as a relay or a switch in which a contact portion is sealed in a housing.

[0002]

2. Description of the Related Art In a relay, if a corrosive gas enters the relay from the outside, the contacts of the relay mechanism are adversely affected by the corrosive gas, so that the relay mechanism is sealed in a housing. I have. However, in such a sealed relay, the coil portion of the electromagnet block, which forms a part of the relay mechanism, is treated with a resin or the like on its surface. The contact surface of the contact portion of the electromagnet block may be corroded by the organic gas, and the arc at the time of opening and closing the contact burns the organic gas, causing carbides to adhere to the surface of the contact. However, there is a problem that the contact reliability is lowered. Such an organic gas may be generated not only from the coil portion but also from an organic material constituting the relay, such as a resin molded product such as a coil bobbin and a housing.

Also, in a switch, when a corrosive gas enters from the outside, the contact portion of the switch mechanism is adversely affected by the corrosive gas, so that the switch mechanism is sealed in a housing. . However, even with such a sealed switch, when an organic gas is generated from a resin molded product such as a housing, the sealed housing is filled with the organic gas, and the contact surface of the contact portion of the switch mechanism is made of the organic gas. There has been a problem that corrosion may occur, and an organic gas is burned by an arc generated when the contacts are opened and closed, and carbides adhere to the surfaces of the contacts, thereby deteriorating the contact reliability of the contact portions.

In order to solve such a problem in a sealed switch such as a sealed relay or a sealed switch in which a contact portion is sealed in a housing, materials such as a coil portion, a coil bobbin and a housing which do not generate gas are selected. However, in this case, the cost of the material may increase, and it is difficult to completely prevent the generation of gas, which is not a very effective solution.

Therefore, a degassing process for removing the organic gas in advance by annealing the coil portion, the coil bobbin, the housing, and the like is performed. However, in this case, there is a problem that the manufacturing process becomes complicated. The organic gas amount inside the housing is reduced by performing a degassing process but, N ₂ in the air in the housing is burned by the opening and closing arc instead to those burning during arcing will decrease , poor contact of the contact portion NO _x is generated in the housing there is a problem in that there is a risk caused by the NO _x.

When a direct current is applied while the surface of the contact portion is clean, particularly when the contact is opened and closed with a capacitive load, the arc point at the time of opening and closing is concentrated at one point on the surface of the contact portion. A transition phenomenon occurs in which one of the contacts melts or evaporates and transfers to the other contact, causing irregularities on the surface of the contact portion, and the progress of the transition phenomenon causes rocking in which the contact is locked, causing a relay or the like. There is also a problem that a malfunction of the switch may occur.

[0007]

As described above, there is a possibility that a problem may occur in the contact reliability of the contacts in a conventional hermetic switch such as a hermetic relay or a hermetic switch. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the contact reliability of contacts in a sealed switch such as a sealed relay or a sealed switch.

[0008]

According to a first aspect of the present invention, there is provided a sealed switchgear having a contact portion hermetically sealed in a housing, wherein the interior of the housing is 2-ethyl-3-hydroxy-4-.
It is characterized by being formed in an atmosphere of a lubricant made of pyrone. The invention according to claim 2 is characterized in that:
It is characterized by using ethyl-3-hydroxy-4-pyrone dissolved in hexylene glycol for use.

According to a third aspect of the present invention, in the hermetic switch in which the contact portion is sealed and housed in the housing, the interior of the housing is formed in an atmosphere of a lubricant comprising 3-methyl-2-oxazolidinone. Is what you do. According to a fourth aspect of the present invention, there is provided a sealed switchgear in which a contact portion is sealed and housed in a housing, wherein the interior of the housing is formed in an atmosphere of a lubricant composed of a mono (polyoxyalkylene) ether of C ₆ -C ₂₄ alkanediol. It is characterized by becoming.

The invention according to claim 5 is characterized in that a 1 mol adduct of hexylene glycol with ethylene oxide is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol. The invention according to claim 6 is characterized in that a 2-mol adduct of ethylene oxide of hexylene glycol is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol.

[0011] The invention of claim 7 is characterized in that as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol, a propylene oxide 2 mol adduct of hexylene glycol is used.
The invention of claim 8 is characterized in that a 4-mol adduct of hexylene glycol with propylene oxide is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol.

A ninth aspect of the present invention is characterized in that 1 mol of butylene oxide adduct of hexylene glycol is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol. The invention of claim 10 is characterized in that an adduct of 2 mol of ethylene oxide of hexylene glycol and 1 mol of propylene oxide is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol. It is.

The eleventh aspect of the present invention is the above-mentioned C ₆ -C _24.
Hexamethylene glycol 2-cyclohexyl cyclohexanol ether is used as the mono (polyoxyalkylene) ether of alkanediol. The invention according to claim 12 is characterized in that
As mono (polyoxyalkylene) ether ₆ -C ₂₄ alkane diol, characterized in that the use of di-hexamethylene glycol.

Further, the invention of claim 13 provides the above-mentioned C ₆ -C ₂₄
As the mono (polyoxyalkylene) ether of alkanediol, 3- (2-ethylhexyloxy) -2-
It is characterized by using hydroxypropyl = 2-methyl-2,4-pentanediol ether.
The invention according to claim 14 is characterized in that the C ₆ -C ₂₄ alkanediol mono (polyoxyalkylene) ether is
Hexamethylene glycol 2-cyclohexyl = cyclohexanol ether, dihexamethylene glycol, and 3- (2-ethylhexyloxy) -2-hydroxypropyl = 2-methyl-2,4-pentanediol ether Is used.

According to a fifteenth aspect of the present invention, there is provided a sealed relay in which an electromagnet block having a contact portion and a coil portion is housed in a housing in a sealed manner. The invention according to claim 16 is a sealed switch in which a switch mechanism such as a contact portion is housed in a housing in a sealed manner.

[0016]

Embodiments of the present invention will be described below. 1 and 2 show the structure of an example of the sealed relay A. FIG. A coil portion 2 formed by winding a coil 12 around a coil bobbin 11 is provided on the outer periphery of the iron core 5, and a permanent magnet 13 is provided between the magnetic pole portions 6 at both ends of the iron core 5 formed in a substantially U-shape. Is attached. The electromagnet block 3 is formed from the iron core 5, the coil portion 2, the permanent magnet 13, and the like. This electromagnet block 3 has fixed contact terminals 15
a, together with a common contact terminal 15b and a coil terminal 15c for energizing the coil 12, are formed integrally with the synthetic resin body 14, and the magnetic pole portions 6 at both ends of the iron core 5 are projected on the upper surfaces of both ends of the body 14. is there. In addition, fixed contact terminal 15a
The fixed contacts 1a protruding from both ends of the body 14 protrude from the upper surface of the body 14, and the fixing pieces 16 connected to the common contact terminals 15c are exposed from the upper surface at the center of the body 14.

Numeral 18 denotes an amateur.
Contact springs 19 are integrally provided on both sides of a molded product 20 molded in the center of the
Is formed. At the center of each contact spring 19, a hinge spring piece 19a extends.
The movable contacts 1b are provided on the lower surfaces at both ends of the movable contact 1b. A projecting ridge 21 is provided on the lower surface of the molded product 20, and FIG.
The armature block 7 is rotatably mounted on the permanent magnet 13 of the electromagnet block 3 with the ridge 21 as a swing fulcrum, and the hinge spring piece 19a of the contact spring 19 is fixed to the fixing piece 16 as shown in FIG. By doing so, the amateur block 7 is attached, and the contact spring 19 and the common contact terminal 15b are electrically connected. When the amateur block 7 is attached in this manner, the fixed contact 1a and the movable contact 1b are vertically opposed, and the contact portion 1 is formed by the opposed fixed contact 1a and the movable contact 1b.

The cover 22 is made of a synthetic resin and is formed in a box shape having an open lower surface. The body 14 is fitted into the cover 22 and adhered to form the cover 22 and the body 14. It is possible to assemble a sealed relay A in which a relay member such as the electromagnet block 3 or the amateur block 7 is sealed in a housing 4 to be sealed. 24 in the figure is a hole for sealing the inside,
It is a blockage.

Next, the operation of the sealed relay A formed as a polarized relay will be briefly described. First, in a steady state in which energization of the coil 12 is stopped, the permanent magnet 1
The end of the armature 18 opposite to the side where the extension position of the hinge spring piece 19a is shifted by the magnetomotive force of 3 is attracted to the magnetic pole portion 6, and the armature block 7 is inclined as shown in FIG. . In this state, the left contact portion 1 in FIG. 2B is closed and the right contact portion 1 is open. Next, when the coil 12 is energized, the other end of the armature 18 is attracted to the magnetic pole portion 6, and the armature block 7 rotates to move the armature block 7 to the side opposite to the inclination in FIG. Is inclined, and the left contact portion 1 in FIG. 2A is opened and the right contact portion 1 is closed. In this state, the coil 12
Is maintained while power is supplied to the power supply. Next, the coil 12
When the power supply to the armature is stopped, the armature 18 returns to the original steady state against the attraction force between the armature 18 and the magnetic pole portion 6 by the permanent magnet 4 by the spring force of the hinge spring piece 19a. In this manner, the fixed contact 1a and the movable contact 1b of the contact portion 1 are brought into contact open 3 with the rotation of the amateur block 7.
It can be opened and closed.

FIG. 3 shows an example of the sealed switch B. A common terminal 31, a normally open terminal 32, and a normally closed terminal 33 are attached to a body 30 formed of a synthetic resin molded product by simultaneous molding, and a base of a contact spring 34 is attached to an upper portion of the common terminal 31. . A movable contact 1c is fixed to the upper and lower surfaces of the tip of the contact spring 34, and fixed contacts 1d, 1f extend from the normally closed terminal 33 and the normally open terminal 32 so as to face the upper and lower movable contacts 1c, 1c. It is provided in the exposed part. The contact portion 1 is formed by the movable contact 1c and the fixed contacts 1d, 1d, and the switch mechanism 8 is formed by the contact portion 1 and the contact spring 34.

The cover 35 is made of a synthetic resin and is formed in a box shape having an open bottom surface. A push button 36 for driving a contact spring 34 is provided through an insertion hole 37 of the cover 35. An elastic cap 38 such as a rubber cap is attached to the insertion hole 37.
8 to seal. 39 is a push button cover. Then, the cover 35 is put on the body 30 and adhered or the like, whereby the sealed switch B in which the switch mechanism 8 is sealed in the housing 4 formed by the body 30 and the cover 35 can be assembled. Reference numeral 40 denotes a dustproof elastic material provided by secondary molding.

In the sealed switch such as the sealed relay A and the sealed switch B as described above, according to the first aspect of the present invention, the inside of the sealed housing 4 is lubricated with 2-ethyl-3-hydroxy-4-pyrone. It is formed in a gas phase atmosphere. This 2-ethyl-3-hydroxy-4
-Pyrone has a molecular formula and a molecular structural formula shown in Chemical Formula 1, and has a moisture absorption of 10% (40 ° C., 90% RH, 1 atm).
It has the following properties.

[0023]

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By making the interior of the housing 4 of the hermetic switchgear the atmosphere of the lubricant with 2-ethyl-3-hydroxy-4-pyrone as described above, the contact reliability of the contact portion 1 can be improved. Yes, the mechanism will be described with reference to FIGS. FIG. 5 shows a state in which such a lubricant is not used. Before opening and closing of the contact portion 1, as shown in FIG. 5 (a), organic gas molecules generated from an organic material forming the housing 4 and the like. m ₁ and has water molecules m ₂ is adsorbed on the surface of the contact part 1, a current when the contact part 1 is opened and closed, an arc a is generated as in FIG. 5 (b), the energy of the arc a The organic gas molecules m ₁ adhering to the contact point of the contact portion 1 are carbonized by
As shown in (c), the surface of the contact portion 1 is covered with the carbide c.
The occurrence of carbides c on the surface of the contact portion 1 causes poor contact of the contact portion 1 and lowers contact reliability.

On the other hand, as described above,
When the lubricant atmosphere is ethyl-3-hydroxy-4-pyrone, gas phase lubricant molecules m ₃ coexist in the housing 4 in addition to the organic gas molecules m ₁ and the water molecules m ₂ ,
These molecules are adsorbed in the form of surface energy of the contact material, hydrogen bond or secondary bond to the contact surface,
The strength of adsorption differs depending on the polarity of the molecule itself. Since the lubricant molecule m ₃ of 2-ethyl-3-hydroxy-4-pyrone has a strong polarity due to its OH group, it is preferentially adsorbed on the surface of the contact portion 1, and as shown in FIG. The surface of the portion 1 is covered with a film of the lubricant molecules m ₃ , and the adhesion of the organic gas molecules m ₁ to the surface of the contact portion 1 can be prevented. Then the arc a is generated during the opening and closing of the contact part 1, when the energy of the lubricant molecules m ₃ to the arc a to adhere to the surface of the contact point of the contact portion 1 acting, 2-ethyl-3-hydroxy - The lubricant molecule m ₃ of 4-pyrone has oxygen in the molecular structure as an OH group, so that the combustion efficiency is good, and the lubricant molecule m ₃ is burned and decomposed into water and carbon dioxide gas, and only a small part is low molecular carbon. 4B, the lubricant molecules m ₃ disappear from the surface of the contact point of the contact portion 2 as shown in FIG.
The surface of the contact point of the contact portion 1 is activated by the combustion of the lubricant molecule m ₃ . At the contact point of the contact portion 1 activated in this way, the lubricant molecule m ₃ having a high adsorptivity is preferentially adsorbed, and is again covered with the film of the lubricant molecule m ₃ as shown in FIG. Thus, it is possible to prevent the organic gas molecules m _{1 from} being adsorbed.

As described above, by forming the interior of the housing 4 in a lubricant atmosphere of 2-ethyl-3-hydroxy-4-pyrone, the organic gas is prevented from adhering to the surface of the contact portion 1. In addition, when the lubricant is burned by the arc, the lubricant is not decomposed into water and carbon dioxide gas, and the carbide does not adhere to the surface of the contact portion 1. The occurrence of defects can be prevented. NO Accordingly it is not necessary to de-gas treatment as conventionally, by combustion of N ₂ in the air tends to occur in association with performing the degassing process
_x is no longer generated in the housing 4 and NO
_This can prevent poor contact of the contact portion 1 caused by _x .

Since the above-mentioned 2-ethyl-3-hydroxy-4-pyrone is a solid at room temperature, it needs to be heated to its melting point when used in a liquid form, but it is dissolved in hexylene glycol. For example, 2-ethyl-3-hydroxy-4-pyrone can be used as a liquid at normal temperature. Hexylene glycol as the solvent itself has the same effect as a lubricant as 2-ethyl-3-hydroxy-4-pyrone, so that the effect of protecting the contact portion 1 can be further enhanced. Can be done. As the hexylene glycol, 2-methyl-2,4
-Pentanediol is preferably used, 2-ethyl-3-hydroxy-4-based on hexylene glycol
The addition amount of pyrone can be arbitrarily set within a range in which 2-ethyl-3-hydroxy-4-pyrone is dissolved in hexylene glycol.

Next, a third aspect of the present invention relates to a sealed switch such as a sealed relay A or a sealed switch B as described above.
The interior of the sealed housing 4 is formed in a gaseous atmosphere of a lubricant of 3-methyl-2-oxazolidinone. This 3-methyl-2-oxazolidinone has the molecular structural formula shown in Chemical Formula 2, and has a melting point of 15 ° C. (765
mmHg) and a boiling point of 87 to 90 ° C (1 mmHg).

[0029]

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Since 3-methyl-2-oxazolidinone has a strong polarity due to its polar group, the contact point takes precedence over the organic gas as in the case of 2-ethyl-3-hydroxy-4-pyrone of claim 1 described above. A film is formed by being adsorbed on the surface of the portion 1, thereby preventing the molecules of the organic gas from adhering to the surface of the contact portion 1, and a high effect of protecting the contact portion 1 from organic gas can be obtained. In addition, since oxygen is contained in the molecular structure, the combustion efficiency is good, and the carbide does not remain on the surface of the contact portion 1, so that the contact reliability of the contact portion 1 can be improved. As described above, the lubricant based on 3-methyl-2-oxazolidinone is the same as the above-described 2-ethyl-3-hydroxy-4-hydroxylamine according to claim 1.
3-Methyl-2-oxazolidinone has the same effect as pyrone, and 3-methyl-2-oxazolidinone has high lubricity, and effectively prevents the occurrence of sticking to be fused when the contacts are rubbed by minute vibration. Is what you can do. Furthermore, since 3-methyl-2-oxazolidinone has an amino group in the molecular structure, the rust-preventing effect of protecting the metal of the contact portion 1 from corrosion is high.

Next, a fourth aspect of the present invention relates to a sealed switch such as the sealed relay A and the sealed switch B as described above, wherein the sealed housing 4 is filled with a C ₆ -C ₂₄ alkanediol mono (polyoxyalkylene). ) It is characterized in that it is formed in an atmosphere of a lubricant composed of ether. C ₆
The mono (polyoxyalkylene) ether of ＣC ₂₄ alkanediol is an ether alcohol having an ether bond and an OH group, and has a strong polarity due to these polar groups.
The 2-ethyl-3-hydroxy-4- compound according to claim 1 as described above.
As in the case of pyrone, the organic gas is adsorbed on the surface of the contact portion 1 in preference to the organic gas to form a film, and molecules of the organic gas are removed from the contact portion 1
Can be prevented from adhering to the surface of the contact portion, and a high effect of protecting the contact portion 1 from the organic gas can be obtained. In addition, since oxygen is contained in the molecular structure, the combustion efficiency is good, and the carbide can be removed. The contact portion 1 does not remain on the surface of the portion 1 and the contact reliability of the contact portion 1 can be improved. As described above, the lubricant based on the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol is a 2-ethyl-3-hydroxy-alkyl compound according to claim 1.
It has the same effect as 4-pyrone, and
₆ -C ₂₄ mono (polyoxyalkylene) ethers of alkanediols have high lubricity, as it can effectively prevent the sticking of fusing occurs when the contact points is rubbed with fine vibrations is there. Further C ₆
Mono (polyoxyalkylene) ether -C ₂₄ alkane diols can be maintained for a long time an effect as a lubricant, it is capable of achieving a long life of the seal switch.

As such a mono (polyoxyalkylene) ether of C ₆ -C ₂₄ alkanediol,
According to the invention of claim 5, 1 mol of an ethylene oxide adduct of hexylene glycol is used. In the invention of claim 6, 2 mol of an ethylene oxide adduct of hexylene glycol is used. In the invention of claim 7, 2 mol of propylene oxide of hexylene glycol is added. The adduct is, in the invention of claim 8, a propylene oxide 4 mol adduct of hexylene glycol,
According to the ninth aspect of the present invention, 1 mol of butylene oxide adduct of hexylene glycol is used. Further, in the invention of claim 10, as a mono (polyoxyalkylene) ether of C ₆ -C ₂₄ alkanediol, an adduct obtained by adding 2 mol of ethylene oxide and 1 mol of propylene oxide to hexylene glycol is used. I have.

As the above hexylene glycol, 2
It is preferred to use -methyl-2,4-pentanediol. The hexylene glycol butylene oxide 1 mol adduct of the ninth aspect has a molecular formula and a molecular structural formula represented by Chemical Formula 3, and has a moisture absorption of 5% (40%).
° C, 90% RH, 1 atm).

[0034]

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In the invention of claim 11, hexamethylene glycol 2-cyclohexyl cyclohexanol ether is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol.
In the invention of claim 13, dihexamethylene glycol is used.
According to the invention, 3- (2-ethylhexyloxy) -2-hydroxypropyl = 2-methyl-2,4-pentanediol ether is used.

The hexamethylene glycol of claim 11
2-cyclohexyl cyclohexanol ether is
The molecular formula and the molecular structural formula are shown in “Formula 4”, and have properties of a moisture absorption of 5% (40 ° C., 90% RH, 1 atm).

[0037]

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The dihexamethylene glycol of the twelfth aspect has a molecular formula and a molecular structural formula represented by the following chemical formula (5).
It has properties of a moisture absorption rate of 5% (40 ° C., 90% RH, 1 atm).

[0039]

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The 3- (2-ethylhexyloxy) -2-hydroxypropyl = 2-methyl-2,4 of claim 13
-Pentanediol ether has a molecular formula and a molecular structural formula represented by Chemical Formula 6, and has a moisture absorption of 1% or less (40 ° C,
90% RH, 1 atm).

[0041]

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The above hexamethylene glycol.
2-cyclohexyl cyclohexanol ether;
Dihexamethylene glycol and 3- (2-ethylhexyloxy) -2-hydroxypropyl = 2-methyl-
Two kinds or two kinds of 2,4-pentanediol ethers can be mixed and used (claim 14). The mixing ratio of these is arbitrary. For example, three types can be used by mixing at a weight ratio of 1: 1: 1.

In order to form the inside of the housing 4 into the atmosphere of the lubricant as described above, the lubricant can be filled in the housing 4 in a gaseous state in advance. For example, the housing 4 can be filled with a gaseous lubricant by heating the lubricant into a gaseous state and pressing the lubricant into the housing 4 while expelling the internal air. By filling the lubricant in the housing 4 in the gaseous state as described above, the concentration of the lubricant in the housing 4 can be made uniform, and the contact of the contact portion due to the variation in the concentration of the lubricant in the housing 4 can be achieved. Variations in effects such as improvement in reliability can be reduced.

The housing 4 can be formed into a lubricant atmosphere by putting the above-mentioned lubricant into the housing 4 in a liquid state. For example, by applying a liquid lubricant to the inner surfaces of the covers 22 and 35 of the housing 4, the lubricant can be put into the housing 4. FIG. 6 shows an example of application of the lubricant 10 to the inner surfaces of the covers 22 and 35. After the lubricant 10 is attached to the lower end of the contact pin 26 as shown in FIG.
As shown in FIGS. 6B and 6C, the lubricant 1 is applied to the inner surface of the cover 22.
0 is transferred from the contact pin 26 to perform coating. When the lubricant in the liquid state is introduced into the housing 4, the lubricant gradually evaporates in the housing 4 and fills the housing 4 for a long time, thereby improving the contact reliability of the contact portion. And the like can be maintained for a long period of time.

Further, by putting the above-mentioned lubricant into the housing 4 in a solid state, the inside of the housing 4 can be formed in a lubricant atmosphere. The lubricant in the solid state can be easily arranged at a required position in the housing 4.
It is easy to incorporate into the inside. When the lubricant is in a liquid state, a porous body such as a sponge may contain the lubricant so that the same handling as in the solid state can be performed.

Here, as shown in FIGS. 1 and 2, a relay member formed by pivotally supporting an armature block 7 so as to contact and repel the magnetic pole portion 6 of the iron core 5 is hermetically housed in the housing 4. In the sealed relay A, the lubricant is gaseous or liquid as described above,
Alternatively, when the housing 4 is put in a solid state and the interior of the housing 4 is made to have a lubricant atmosphere, the vaporized lubricant wraps around the support portion of the armature block 7, for example, the ridge 21, and generates a thin film of the lubricant molecules to form the armature block. 7 can be smoothly rotated. Also, a thin film of vaporized lubricant molecules is formed between the magnetic pole portion 6 of the iron core 5 and the armature 18, so that wear caused by opening and closing of the magnetic pole portion 6 and the armature 18 can be reduced.

The substances constituting the above-mentioned lubricants according to claims 1 to 14 can be used alone or in combination of one or more.

[0048]

As described above, according to the first aspect of the present invention, there is provided a sealed switch in which a contact portion is housed in a housing in a sealed manner.
Since the interior of the housing was formed in an atmosphere of a lubricant composed of 2-ethyl-3-hydroxy-4-pyrone,
2-Ethyl-3-hydroxy-4-pyrone has a strong polarity due to its polar group, and adsorbs on the surface of the contact portion in preference to the organic gas, thereby preventing molecules of the organic gas from adhering to the surface of the contact portion. Therefore, it is possible to obtain a high effect of protecting the contact portion from the organic gas, and furthermore, since oxygen is contained in the molecular structure, the combustion efficiency is good, and the carbide does not remain on the surface of the contact portion. The contact reliability of the part can be improved.

The invention of claim 2 is characterized in that the 2-ethyl-
Since 3-hydroxy-4-pyrone is used by dissolving it in hexylene glycol, 2-ethyl-3-hydroxy-4-pyrone can be handled in liquid form at normal temperature with hexylene glycol. Thereby, the effect of the contact reliability of the contact portion can be further enhanced.

According to a third aspect of the present invention, in the hermetically sealed switch in which the contact portion is sealed and housed in the housing, the interior of the housing is formed in an atmosphere of a lubricant composed of 3-methyl-2-oxazolidinone. 3-methyl-2-
Oxazolidinone has a strong polarity due to its polar group, adsorbs on the surface of the contact part in preference to the organic gas, prevents molecules of the organic gas from adhering to the surface of the contact part, and protects the contact part from organic gas It is possible to obtain a high effect, and since oxygen is contained in the molecular structure, combustion efficiency is good, and carbide does not remain on the surface of the contact portion, and contact reliability of the contact portion can be improved. You can do it. Further, the 3-methyl-2-oxazolidinone has high lubricity, and can effectively prevent sticking that occurs when the contacts are rubbed by minute vibrations. Since the structure has an amino group, it has a high rust-preventing effect of protecting the metal of the contact portion 1 from corrosion.

According to a fourth aspect of the present invention, there is provided a sealed switchgear in which a contact portion is sealed and accommodated in a housing, wherein the interior of the housing is made of a lubricant comprising a mono (polyoxyalkylene) ether of a C ₆ -C ₂₄ alkanediol. The invention of claim 5 is a mono (polyoxyalkylene) ether of a C ₆ -C ₂₄ alkanediol which is formed in an atmosphere, and a 1 mol ethylene oxide adduct of hexylene glycol, and the invention of claim 6 is The invention of claim 7 relates to a 2 mol adduct of propylene oxide of xylene glycol, the invention of claim 7 relates to a 4 mol adduct of propylene oxide of hexylene glycol, The invention of claim 1 provides a 1 mol adduct of butylene oxide with hexylene glycol, Ming is an adduct of 2 moles of ethylene oxide and 1 mole of propylene oxide of hexylene glycol, the invention of claim 11 is hexamethylene glycol / 2-cyclohexyl cyclohexanol ether, and the invention of claim 12 is dihexamethylene glycol. The invention of claim 13 is based on 3- (2-ethylhexyloxy) -2-hydroxypropyl = 2-methyl-2,4-
The invention of claim 14 uses pentanediol ether, hexamethylene glycol 2-cyclohexyl cyclohexanol ether, dihexamethylene glycol, and 3- (2-ethylhexyloxy) -2-hydroxypropyl = 2-methyl-2, Since two or more kinds of 4-pentanediol ethers are mixed and used, respectively, these mono (polyoxyalkylene) ethers of C ₆ -C ₂₄ alkanediol have a strong polarity due to their polar groups, and organic gas is used. It is possible to obtain a high effect of protecting the contact portion from the organic gas by preventing the molecules of the organic gas from adhering to the surface of the contact portion by adsorbing on the surface of the contact portion in preference to the above. Combustion efficiency is high because oxygen is contained in the molecular structure, and carbide does not remain on the surface of the contact part Ri, it is capable of improving the contact reliability of the contact portion. Further, these C ₆ -C
The mono (polyoxyalkylene) ether of ₂₄ alkanediol has high lubricity and can effectively prevent sticking that occurs when the contacts are rubbed by minute vibrations. These C
Mono (polyoxyalkylene) ether ₆ -C ₂₄ alkane diols can be maintained for a long time an effect as a lubricant, it is capable of achieving a long life of the seal switch.

According to a fifteenth aspect of the present invention, in a sealed relay in which an electromagnet block having a contact portion and a coil portion is sealed and housed in a housing, the interior of the housing is formed in the above-described lubricant atmosphere. A highly reliable contact relay can be obtained. According to a sixteenth aspect of the present invention, in a sealed switch in which a switch mechanism such as a contact portion is sealed and housed in a housing, the interior of the housing is formed in the atmosphere of the lubricant, so that contact reliability of the contact is high. A sealed switch can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of an embodiment using a sealed relay of the present invention.

FIG. 2 shows an example of an embodiment using a sealed relay of the present invention, wherein (a) is a front view in which a cover is cut,
(B) is a front view in which a part of the cover and the electromagnet block is cut, and (c) is a schematic front view of the electromagnet block and the amateur block.

FIG. 3 is a sectional view showing an example of an embodiment using a sealed switch of the present invention.

FIGS. 4A and 4B show the state of the surface of the contact portion when the contact is opened and closed in the present invention, and FIGS. 4A, 4B, and 4C are schematic diagrams.

FIGS. 5A and 5B show the state of the surface of the contact portion when the contact is opened and closed in the related art, and FIGS. 5A, 5B, and 5C are schematic diagrams, respectively.

FIG. 6 shows the application of a lubricant to a cover;
(A), (b), (c) is a schematic diagram showing a procedure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact part 2 Coil part 8 Switch mechanism A Sealed relay B Sealed switch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI // C10N 40:14 (72) Inventor Kazuhiro Shinto 1048 Odakadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inventor Kazunori Tani, 1048 Kadoma, Kazuma, Kazuma, Osaka Prefecture, Japan Matsushita Electric Works, Ltd. Address: Matsushita Electric Works, Ltd. (72) Inventor Narutori Uda 1006, Oazadoma, Kadoma, Osaka Prefecture, Matsushita Electric Industrial Co., Ltd.

Claims (16)

[Claims] In a sealed switchgear in which a contact portion is sealed and housed in a housing, the interior of the housing is 2-ethyl-3-.
A sealed switch formed in an atmosphere of a lubricant comprising hydroxy-4-pyrone. 2. The above 2-ethyl-3-hydroxy-4-
The hermetic switch according to claim 1, wherein pyrone is used by dissolving it in hexylene glycol. 3. A sealed switch in which a contact portion is housed in a sealed manner in a housing.
A sealed switch formed in an atmosphere of a lubricant composed of oxazolidinone. 4. A sealed switchgear in which a contact portion is sealed and housed in a housing, wherein the inside of the housing is formed in an atmosphere of a lubricant comprising a mono (polyoxyalkylene) ether of C ₆ -C ₂₄ alkanediol. A sealed switch. 5. The hermetic switch according to claim 4, wherein the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol is a 1 mol ethylene oxide adduct of hexylene glycol. 6. The hermetic switch according to claim 4, wherein a 2-mol ethylene oxide adduct of hexylene glycol is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol. 7. The hermetic switch according to claim 4, wherein a 2-mol adduct of hexylene glycol with propylene oxide is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol. 8. The hermetic switch according to claim 4, wherein a 4-mol adduct of hexylene glycol with propylene oxide is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol. 9. The hermetic switch according to claim 4, wherein a 1 mol adduct of butylene oxide of hexylene glycol is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol. 10. The method according to claim 4, wherein as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol, an adduct of 2 mol of hexylene glycol ethylene oxide and 1 mol of propylene oxide is used. A sealed switch as described. 11. The hermetic switch according to claim 4, wherein hexamethylene glycol / 2-cyclohexyl cyclohexanol ether is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol. . 12. The method according to claim 4, wherein dihexamethylene glycol is used as the mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol.
A sealed switch according to item 1. 13. The mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol described above is 3- (2
-Ethylhexyloxy) -2-hydroxypropyl =
The sealed switch according to claim 4, wherein 2-methyl-2,4-pentanediol ether is used. 14. A mono (polyoxyalkylene) ether of the C ₆ -C ₂₄ alkanediol, hexamethylene glycol / 2-cyclohexyl cyclohexanol ether, dihexamethylene glycol,
The sealed switch according to claim 4, wherein a mixture of at least two of-(2-ethylhexyloxy) -2-hydroxypropyl = 2-methyl-2,4-pentanediol ether is used. . 15. The sealed switch according to claim 1, wherein the sealed switch is a sealed relay in which an electromagnet block having a contact portion and a coil portion is housed in a housing in a sealed manner. 16. The hermetic switch according to claim 1, wherein the hermetic switch is a hermetic switch in which a switch mechanism such as a contact portion is hermetically housed in a housing.