JPH061702A - Electrical apparatus with electromagnetic device - Google Patents

Abstract

PURPOSE:To provide an electrical apparatus with an electromagnetic device, capable of preventing an insect from invading over a long period. CONSTITUTION:This is an apparatus obtained by applying a coating type insectifuge (P) to an electrical apparatus (T) with an electromagnetic device. The coating agent is a volatile insectifuge supported on a carrier and the carrier is selected from a synthetic resin, an inclusion compound, an occlusion compound and a porous material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device equipped with an electromagnetic device capable of preventing insects from entering.

[0002]

2. Description of the Related Art An electric device with an electromagnetic device, such as a timepiece, is equipped with a drive motor which is a kind of electromagnetic device.
Gears and the like that transmit this driving force to the hands are made of synthetic resin. By the way, in areas with thick and high humidity, such as Southeast Asia, small insects such as ants may invade devices such as watches, and the invading ants enter between gears, etc. Inhibits the rotation of gears. In extreme cases, a synthetic resin molded part, such as a gear, may be bitten, which hinders the normal rotation of the timepiece mechanical body. Although the cause of gnawing a gear has not been completely clarified yet, there is a view that it is the action of an invading ant in a state of panicking due to magnetic force or electromagnetic waves from a drive motor or a crystal oscillator. It has been reported that such behaviors of ants are not limited to watches, and that electric resin refrigerators, compact disk drive devices, and the like have been bitten by the synthetic resin parts constituting them.

By the way, various measures can be considered for preventing the damage caused by the insects. For example, the timepiece mechanical body is made of metal or high-strength synthetic resin and is rotated with a large torque. However, this measure increases the cost significantly and is not realistic. As another measure, it may be possible to make a completely sealed structure to prevent insects from entering. However, it is technically difficult because the operating knobs of the pointer are outside the frame of the timepiece. Further, as another measure, it is possible to place an insecticide inside the machine body. However, this measure is not only ineffective in preventing the invasion of insects, but when it is dead in the machine body, it is in the same state as when dust invades. In addition, chemicals having a repellent effect on insects are highly volatile and the effect can be expected to last for only a few hours, which makes it extremely difficult to prevent insects from invading electrical equipment with an electromagnetic device.

Due to the above circumstances, there is virtually no electric device to which the above-mentioned measures against insects have been taken.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric device with an electromagnetic device which can prevent insects from entering for a long period of time.

[0006]

A feature of the present invention is that an insect repellent coating agent is applied to at least one of the components of an electric device with an electromagnetic device, and the coating agent is volatile. A carrier carrying an insect repellent, the carrier being selected from a synthetic resin, an inclusion compound and a porous body, and if necessary, the carrier selected above. It is used by crushing and kneading it with a material selected from oil, grease and synthetic resin.

Examples of insect repellents include N, N-diethyltoluamide.

Further, as a method of supporting the insect repellent on a carrier, a method of dispersing the insect repellent in a synthetic resin, a method of supporting the insect repellent on an inclusion compound, and a storage compound of the insect repellent There is a method of supporting the insect repellent on the porous body, and a method of supporting the insect repellent on the porous body, and the carrier is selected from these. As the synthetic resin to be carried, polyvinyl butyral (PVB), polyvinyl alcohol (P
VA), cellulose resin, polyvinyl chloride (PVC),
Examples include silicone / acrylic acid copolymers. Such resins that can be used are those with poor gas permeability,
Not limited to thermoplasticity, reaction-curable thermosetting resin or rubber may be used. Inclusion compounds include saccharides such as cyclodextrin, cellulose compounds, crown ethers, and hydrudines. Further, the storage compound includes aluminosilicate. Further, examples of the porous body include alumina and silica.

The above-mentioned carrier is crushed and the powder or granules are kneaded with grease or the like for use. This is effective in maintaining the insect repellent effect for a long period of time. Coating materials for such crushed carriers include polyvinyl butyral (PVB) and polyvinyl alcohol (P
A coating material for a watch frame such as VA), a synthetic resin used as a potting agent provided on a circuit board installed in the watch mechanical body, oil used as a lubricant, grease, and a watch mechanical body. The carrier is incorporated into these coatings, which are selected from among the adhesives for the mutual parts.

[0010]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a timepiece T as an example of an electric device with an electromagnetic device. The lower case 1 and the upper case 2 are made of plastic, and both are joined by screws to form a mechanical body. This is what constitutes a case.
The rotor pinion 3 is formed of a plastic material and fixed to the rotor pinion, and the S pole and N pole are magnetized at equal intervals on the circumference of the rotor magnet 4. The stator 5 is excited by a coil 6 connected to a crystal oscillation circuit or a frequency dividing circuit,
It rotates in one direction intermittently, so that the 2nd gear 7, the 3rd gear 8 and the 4th gear 9 are made of plastic.
To drive the reduction gear train. The minute hand wheel 10 rotates in conjunction with the fourth gear 9 and rotates the hour hand wheel 12 via the Hino back wheel 11. As a result, the pointer 15 rotates. The minute hand wheel 10 penetrates through the upper case 2 and has a needle turning knob 13 fixed to the tip thereof. The pipe of the hour wheel 12 is rotatably supported on the inner circumference of the pipe of the reference wheel 14. The second reference wheel 16 meshes with the reference wheel 14,
The reference turning pin 17 meshing with the second reference wheel penetrates the upper case 2 and has a reference time setting knob 1 at its tip.
8 is stuck.

Then, the coating agent P is directly applied to the outer surface of the upper case 2 and the inner surface of the upper case 2 or the lower case 1 around the needle turning knob 13 and the reference time setting knob 18 protruding from the upper case 2. Has been done. In some cases, the insect repellent may be mixed in the lubricating oil of the bearing portion of the rotor magnet 4 and the bearing portion of the other train wheel. further,
The application target of the coating agent P is not limited to the case, and may be applied to other components such as gears.

Therefore, examples of the coating agent P will be described below.

Example 1 PVB resin is dissolved in methyl alcohol to form a highly viscous solution. This is mixed with N, N-diethyltoluamide and applied to the outer periphery of the upper case 2 of the watch. When the solvent volatilizes, a resin coating film (solid body) carrying this repellent is formed. The resin repellent is in a state in which the insect repellent is dispersed and attached to the device, but the insect repellent is not completely sealed. This state is similar to, for example, a state in which a plasticizer is dispersed in polyvinyl chloride resin, and the insect repellent is gradually vaporized. Due to the semi-sealing effect of the repellent, the insect repellent is gradually dispersed over a long period of time, so that the insect is prevented from entering the frame body of the timepiece.

Example 2 In addition, like ethyl silicate, when it is dissolved in water or alcohol to be in a gelled state and a porous body is formed in this gelled state, N, which is the insect repellent in the sol state, N
It is also possible to knead diethyltoluamide and apply it to the outer peripheral surface of the upper case 2 and then gel and fix it.

Example 3 Activated carbon, porous silica, porous aluminosilicate, PV
N, N-diethyltoluamide is mixed and carried in the powder of B resin, and after excess N, N-diethyltoluamide is evaporated, it is mixed in lubricating grease and used as a grease when the rotor is installed. . Of course, the above-mentioned powder may be mixed in the adhesive used for bonding the parts and used as the adhesive.

According to this embodiment, since the insect repellent is applied at the same time as the work during the timepiece assembling process, no special work for applying is required.

Example 4 In addition, a resin that is extremely easy to cure and has a very low volatilization of N, N-diethyltoluamide at the time of curing, for example, an ultraviolet curable resin, an RTV resin of silicon, and a powder of Example 3 with N, Mixing the one carrying N-diethyltoluamide,
It can also be dispersed and used. In this example, the solid repellent has its volatility extremely controlled and the insect repellent effect is further prolonged.

[0019]

INDUSTRIAL APPLICABILITY According to the present invention, since the insect repellent effect is exerted for a long period of time, it is possible to prevent insects from entering electric equipment with an electromagnetic device such as a watch, a refrigerator or a compact disc for a long time. In the present invention, the insect repellent effect is prolonged, the repellent effect per unit time is less, but the device is not something that insects originally prefer to enter, because the insect encountered the device during movement. The insect invasion-preventing effect can be achieved if it invades the worm and has a slight repellent effect.

[Brief description of drawings]

1 is a cross-sectional view of a watch

[Explanation of symbols]

 T Electric equipment with electromagnetic device (clock machine body) P Coating agent

Claims (2)

[Claims] 1. At least one of the constituents is coated with an insect repellent coating agent, wherein the coating agent has a volatile insect repellent agent supported on a carrier. Is an electric device with an electromagnetic device, which is selected from a synthetic resin, an inclusion compound, an occlusion compound, and a porous body. 2. The carrier according to claim 1, wherein the carrier is selected from a synthetic resin, an inclusion compound, an occlusion compound and a porous body, and the selected carrier is pulverized,
It is a mixture of oils, greases, and synthetic resins. An electric device with an electromagnetic device, which is characterized in that