JPH10162670A - 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 polyalcohols selected from 3methyl-1,5- bentanediol, isoprene glycol, and octanediol. These polyalcohols have strong polarity and are adsorbed on the surfaces of the contact parts 1 prior to organic gas molecules, and consequently the surfaces of the contact parts 1 are covered with a film of the lubricating agent molecules of the polyalcohols and adhesion of organic gas molecules to the surfaces of the contact parts 1 is thus prevented.

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 in which a contact portion is sealed and housed in a housing, wherein the interior of the housing is provided with 3-methyl-1,5-pentanediol, isoprene glycol, octane. It is formed in an atmosphere of a lubricant composed of polyhydric alcohols selected from diols.

According to a second aspect of the present invention, there is provided a sealed switchgear having a contact portion sealed and housed in a housing, wherein the interior of the housing is a 1-mol adduct of 3-methyl-1,5-pentanediol with propylene oxide and isoprene glycol. It is characterized by being formed in an atmosphere of a lubricant composed of ether alcohols selected from propylene oxide 1 mol adduct and octane diol 1 mol propylene oxide adduct.

According to a third aspect of the present invention, the housing is filled with the lubricant in a gaseous state. The invention according to claim 4 is characterized in that the lubricant is put into the housing in a liquid state. The invention of claim 5 is characterized in that the above-mentioned lubricant is accommodated in a housing in a solid state.

According to a sixth 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 sealed and accommodated in a housing. The invention according to claim 7 is a sealed relay in which a relay member formed by rotatably supporting an armature block so as to abut against and repel a magnetic pole portion of an iron core is hermetically housed in a housing. Things.

An eighth aspect of the present invention is a sealed switch in which a switch mechanism such as a contact portion is sealed and housed in a housing.

[0013]

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.

Reference 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 way, the fixed contact 1a and the movable contact 1b of the contact section 1 can be opened and closed by contacting and separating the movable contact 1b with the rotation of the amateur block 7.

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 formed in a box shape with 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.

According to the first aspect of the present invention, in the sealed switch such as the sealed relay A and the sealed switch B as described above, the sealed housing 4 is made of a lubricant made of a polyhydric alcohol having a plurality of -OH groups. In a gaseous atmosphere. As the polyhydric alcohols, 3-methyl-1,5- represented by the formula (1) of the chemical formula 1 is used.
Pentanediol, isoprene glycol having a structural formula represented by Formula (2) of Chemical Formula 1, and octanediol having a structural formula represented by Formula (3) of Chemical Formula 1 are used. These 3-methyl-1,5-pentanediols,
Isoprene glycol and octanediol may be used alone or in combination of two or three.

[0020]

Embedded image

As described above, by making the interior of the housing 4 of the hermetic switchgear the atmosphere of the lubricant made of polyhydric alcohol, the contact reliability of the contact portion 1 can be improved. A description will be given based on FIG. 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 water molecules m ₂ are adsorbed on the surface of the contact portion 1, and the current when the contact portion 1 is opened and closed is shown in FIG.
When the arc a is generated as shown in FIG. 5B, the energy of the arc a carbonizes the organic gas molecules m ₁ adhering to the contact point of the contact portion 1, and as shown in FIG. Covered with 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, when the interior of the housing 4 is in an atmosphere of a lubricant made of a polyhydric alcohol as described above, in addition to the organic gas molecules m ₁ and the water molecules m ₂ , a gas phase lubricant molecule m ₃ is formed. These molecules coexist, and these molecules are adsorbed in the form of surface energy possessed by the contact material, hydrogen bonds or secondary bonds to the contact surface, etc. Different in strength. Then, since the lubricant molecule m ₃ of polyhydric alcohol has a strong polarity due to its hydroxyl group, it is preferentially adsorbed on the surface of the contact portion 1 and FIG.
As shown in (a), the surface of the contact portion 1 is covered with a film of the lubricant molecule m ₃ , and the surface of the contact portion 1 has an organic gas molecule m 3.
₁ can be prevented from adhering. 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 acts, lubricant molecules m ₃ polyvalent Since it is composed of alcohols, the lubricant molecule m ₃ is burned and decomposed into water and carbon dioxide gas, and only a small part is decomposed into low molecular carbon, and as shown in FIG. The lubricant molecules m ₃ disappear from the surface of the contact point, and the surface of the contact point of the contact portion 1 is activated by the combustion of the lubricant molecules 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 inside of the housing 4 in an atmosphere of a lubricant made of polyhydric alcohols,
The organic gas can be prevented from adhering to the surface of the contact portion 1, and when the polyhydric alcohol is burned by the arc, it is decomposed into water and carbon dioxide gas and the carbide is removed.
Does not adhere to the surface of the contact portion 1, and it is possible to prevent the occurrence of poor contact of the contact portion 1 due to the arc at the time of opening and closing.

In the present invention, among the polyhydric alcohols, 3-methyl-1,5-pentanediol, isoprene glycol and octanediol are particularly selected and used. Since it has no side chain, the chain is easily broken, and it has a side chain that has a weaker bonding force than the main chain, so it is easily decomposed by heat.
As a base, it contains oxygen that assists combustion in the molecule, and has good combustion efficiency and is easy to completely burn. Therefore, the carbide is not easily decomposed by the energy of the arc and the carbide does not remain on the surface of the contact portion 1, and the effect of preventing the occurrence of the contact failure of the contact portion 1 can be enhanced.

Next, according to the second aspect of the present invention, in a sealed switch such as the sealed relay A or the sealed switch B as described above, one or more OH groups and one or more -O The lubricant is formed in the gaseous atmosphere of the ether alcohol having a bond. Examples of the ether alcohol include a 1-mol propylene oxide adduct of 3-methyl-1,5-pentanediol represented by the structural formula of the formula (4) of Chemical Formula 2.
1 mol of propylene oxide adduct of isoprene glycol as shown by the structural formula of the formula (5)
A propylene oxide 1 mol adduct of octanediol as represented by the structural formula (6) of "Formula 2" is used. These 1-mol propylene oxide adducts of 3-methyl-1,5-pentanediol, isoprene glycol and octanediol may be used alone or in combination of two or three.

[0026]

Embedded image

Since ether alcohols have a strong polarity due to the presence of ether bonds and OH groups, as in the case of the above-mentioned polyhydric alcohols, they are adsorbed on the surface of the contact portion 1 preferentially over the organic gas. To prevent the molecules of the organic gas from adhering to the surface of the contact portion 1, and have an ether bond or an OH group of a side chain, so that the combustion efficiency is good, and the carbide is formed on the surface of the contact portion 1. This does not remain, and the contact reliability of the contact portion 1 can be improved. As described above, the ether alcohol is preferentially adsorbed on the surface of the contact portion 1 over the organic gas, and is completely burned, so that no carbide remains on the surface of the contact portion 1. Therefore, it is not necessary to perform the degassing treatment. NO _x due to the combustion of N _{2 in} the air, which tends to be generated by performing the gas treatment, is not generated in the housing 4,
The contact failure of the contact portion 1 caused by NO _x can be prevented. Furthermore, the gas molecules of ether alcohols are randomly attached to the surface of the contact portion 1 to form a uniform film as a whole, and even in the case of a DC capacity load, the arc flies to various places and the arc points are concentrated at one point. The wear due to the arc is evenly performed on the surface of the contact portion 1, and the occurrence of the transfer phenomenon can be prevented.

Among the above-mentioned 1-mol adducts of polyhydric alcohols with propylene oxide as ether alcohols, those in which the polyhydric alcohol is 3-methyl-1,5-pentanediol or octanediol are the 3-methyl-1,3-pentanediol or octanediol. Since -1,5-pentanediol and octanediol have low hygroscopicity among the polyhydric alcohols, less moisture is introduced into the housing 4 and the housing 4
It is possible to prevent metal parts such as the contact portion 1, the electromagnet block 3, and the switch mechanism 8 from being corroded by moisture in the inside atmosphere.

Among the ether alcohols, the propoxylated alkylene diols shown in the above "Chemical Formula 2" are compounds having a faint yellow liquid in appearance and having no ignitability, oxidizing property, self-reactivity, or explosive property. In addition, these compounds have a benzene ring and thus are apt to be broken, and have side chains that have a weaker bonding force than the main chain. And has good combustion efficiency and is easy to completely burn. Therefore, the carbide is not easily decomposed by the energy of the arc and the carbide does not remain on the surface of the contact portion 1, and the effect of preventing the occurrence of the contact failure of the contact portion 1 can be enhanced.

The interior of the housing 4 can be formed into an atmosphere of a lubricant by filling the housing 4 with the lubricant composed of polyhydric alcohols and ether alcohols in a gas state in advance. 3). 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 lubricant composed of the above-mentioned polyhydric alcohols and ether alcohols is applied to the housing 4 in a liquid state.
The housing 4 can be formed in an atmosphere of a lubricant by being put in the housing (claim 4). 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. b) As shown in (c), the lubricant 10 is transferred to the inner surface of the cover 22 from the contact pins 26 and applied. 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.

When the lubricant is applied to the inside of the housing 4 as described above, the lubricant shown in Chemical Formula 2 is used, and the lubricant is applied to the sealed relay A having a capacity of about 150 mm ^{3 in} the housing 4. , Small CR load high temperature (8
FIG. 7 shows the measurement results of the contact reliability of the contacts when the contacts are opened and closed (about 0 ° C.). FIG. 7 is a graph showing the relationship between the number of tests (the number of times the contacts are opened and closed) of the sealed relay A and the number of defective contacts.
FIG. 7A shows the result when no lubricant is applied, and FIG.
FIG. 7 (b) shows the result when 0.3 μl of a 1 mol propylene oxide adduct of 3-methyl-1,5-pentanediol of the structural formula (4) was applied, and FIG. 7) shows the results when 0.3 μl of a 1 mol propylene oxide adduct of isoprene glycol of the structural formula is applied, and FIG. 7 (d) shows the results of the addition of a 1 mol propylene oxide adduct of octanediol of the structural formula (6). 0.3
The results in the case of applying μL are shown below. still,
A contact resistance (CR)> 100 mΩ was determined as a defective contact. As shown in FIG. 7, it is confirmed that the contact reliability of the contact is greatly improved by applying the above three kinds of lubricants as compared with the case where no lubricant is applied.

The lubricant composed of the above-mentioned polyhydric alcohols and ether alcohols is added to the housing 4 in a solid state.
The housing 4 can be formed into an atmosphere of a lubricant by being put in the housing (claim 5). As described above, the solid-state lubricant is easily arranged at a required place in the housing 4 and is easily incorporated into the housing 4. 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 abut against 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 (claim 7), the vaporized lubricant wraps around the support portion of the amateur block 7, for example, the ridge 21, and the thin film of the lubricant molecules is removed. This allows the amateur block 7 to rotate smoothly. 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.

[0035]

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.
The interior of the housing is formed in an atmosphere of a lubricant composed of polyhydric alcohols selected from 3-methyl-1,5-pentanediol, isoprene glycol, and octanediol. The molecules are strong in polarity and are adsorbed on the surface of the contact part in preference to the organic gas molecules, and the surface of the contact part is covered with a film of lubricant molecules of polyhydric alcohols, and the organic gas molecules adhere to the surface of the contact part This can prevent occurrence of contact failure at the contact portion due to carbonization of organic gas molecules by an arc at the time of opening and closing, and can enhance contact reliability of the contact. In addition, these 3-methyl-
1,5-pentanediol, isoprene glycol, and octanediol do not have a benzene ring, so they are easily broken, and because they have a side chain that has a weaker bonding force than the main chain, they are easily thermally decomposed. It contains oxygen that assists combustion in the molecule, has good combustion efficiency and is easy to burn completely, and is easily decomposed by the energy of the arc so that carbide does not remain on the surface of the contact portion, The effect of the contact reliability of the contact can be obtained high.

According to a second aspect of the present invention, there is provided a sealed switchgear having a contact portion sealed and housed in a housing, wherein the interior of the housing is a 3-methyl-1,5-pentanediol adduct of 1 mol of propylene oxide, isoprene glycol. Is formed in the atmosphere of a lubricant composed of ether alcohols selected from propylene oxide 1 mol adduct of octanediol and 1 mol of propylene oxide, so that the lubricant molecules of these ether alcohols have a strong polarity. The organic gas molecules are adsorbed on the surface of the contact portion in preference to the organic gas molecules, and the surface of the contact portion is covered with a film of lubricant molecules of ether alcohols, so that the organic gas molecules can be prevented from adhering to the surface of the contact portion. To prevent contact failure at the contact due to carbonization of organic gas molecules by the arc at opening and closing Bets can be one in which it is possible to enhance the contact reliability of the contact. Moreover, since these ether alcohols have high combustion efficiency, there is no need to perform degassing treatment, NO _x is not generated in the housing, and the contact reliability of the contact can be further improved. The molecules of the ether alcohols are randomly attached to the surface of the contact portion, so that the arc point is not concentrated even under a direct current capacity load, thereby preventing the occurrence of a transition phenomenon. In addition, propylene oxide 1 of these 3-methyl-1,5-pentanediols
Mole adducts, 1 mol adducts of propylene oxide of isoprene glycol, and 1 mol adducts of propylene oxide of octanediol have no benzene ring, so they are easily broken, and have side chains whose bonding strength is weaker than the main chain. It is easily thermally decomposed and contains oxygen as an OH group in the molecule to help combustion.It has good combustion efficiency and is easy to burn completely.It is easily decomposed by the energy of the arc and carbides are formed at the contact point. It does not remain on the surface, and a high effect of contact reliability of the contact can be obtained. Furthermore, these 3-methyl-1,5-
1 mole of propylene oxide adduct of pentanediol, 1 mole of propylene oxide of isoprene glycol, 1 propylene oxide of octanediol
The mole adduct has low hygroscopicity, can reduce the hygroscopicity in the atmosphere of the housing, and can prevent corrosion of the contact portions and metal parts.

According to the third aspect of the present invention, the lubricant is filled into the housing in a gaseous state, so that the concentration of the lubricant in the housing can be made uniform, and the lubricant in the housing can be made uniform. It is possible to reduce the variation in the effect of improving the contact reliability of the contact due to the variation in the concentration. According to the invention of claim 4, since the lubricant is put into the housing in a liquid state, the lubricant gradually evaporates in the housing and fills the housing for a long time. The effect of improving the contact reliability can be maintained for a long time.

According to the fifth aspect of the present invention, the lubricant is accommodated in a solid state in the housing. Therefore, the solid state lubricant can be easily arranged at a required place in the housing, and the lubricant can be incorporated in the housing. Some things are easier. According to a sixth 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 inside of the housing is formed in an atmosphere of the lubricant, so that contact reliability of the contact is improved. A highly sealed relay can be obtained.

According to a seventh aspect of the present invention, there is provided a sealed relay in which a relay member formed by rotatably supporting an armature block so as to abut against and repel a magnetic pole portion of an iron core is hermetically sealed in a housing. Since the inside is formed in the atmosphere of the above-described lubricant, a thin film of vaporized lubricant molecules is generated in the support portion of the amateur block, and the rotation of the amateur block can be smoothly performed. Further, a thin film of vaporized lubricant molecules is formed between the magnetic pole portion of the iron core and the armature, thereby reducing wear caused by opening and closing of the magnetic pole portion and the armature.

According to the eighth aspect of the present invention, in a sealed switch in which a switch mechanism such as a contact portion is hermetically housed in a housing, the interior of the housing is formed in an atmosphere of the above-mentioned lubricant, so that contact reliability of the contact is improved. A highly reliable 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.

FIG. 7 is a graph showing the relationship between the number of test times of a sealed relay and the number of defective contacts, where (a) is a graph in the case where a lubricant is not applied, and (b) is 3-methyl-1,5- as a lubricant. Graph when propylene oxide 1 mol adduct of pentanediol is applied, (c) Graph when propylene oxide 1 mol adduct of isoprene glycol is applied as a lubricant, (d) propylene of octanediol as a lubricant It is a graph at the time of apply | coating 1 mol oxide addition material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact part 2 Coil part 3 Electromagnet block 4 Housing 5 Iron core 6 Magnetic pole part 7 Amateur block 8 Switch mechanism A Sealed relay B Sealed switch

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masahiko Sowa 1048 Kadoma Kadoma, Osaka Pref.Matsushita Electric Works, Ltd. 72) Inventor Narita Uda 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (8)

[Claims] 1. A sealed switchgear in which a contact portion is sealed and housed in a housing.
A sealed switch formed in an atmosphere of a lubricant comprising a polyhydric alcohol selected from 1,5-pentanediol, isoprene glycol and octanediol. 2. A sealed switch in which a contact portion is housed in a sealed manner in a housing.
It is formed in a lubricant atmosphere composed of ether alcohols selected from propylene oxide 1 mol adduct of 1,5-pentanediol, propylene oxide 1 mol of isoprene glycol, and propylene oxide 1 mol of octanediol. Sealed switch characterized by that. 3. A sealed switch characterized by filling the housing with the lubricant according to claim 1 or 2 in a gaseous state. 4. A hermetic switch, wherein the lubricant according to claim 1 or 2 is put into a housing in a liquid state. 5. A sealed switch wherein the lubricant according to claim 1 or 2 is accommodated in a solid state in a housing. 6. The sealed switch according to claim 1, wherein the relay is a hermetically sealed relay in which an electromagnet block having a contact portion and a coil portion is housed in a housing in a sealed manner. 7. A sealed relay, wherein a relay member formed by pivotally supporting an armature block so as to abut and repel a magnetic pole portion of an iron core is hermetically sealed in a housing. The sealed switch according to any one of claims 1 to 5. 8. The sealed switch according to claim 1, wherein the switch is a sealed switch in which a switch mechanism such as a contact portion is sealed in a housing.