JPS6214576Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a waterproofing device for key switches such as motorcycles, agricultural machinery, civil engineering machinery, etc., where the key switches are directly exposed to the outside air and often exposed to rainwater.

Conventional keyswitches of this type do not yet have sufficient waterproofing measures against rainwater, etc.

For example, a key switch for a motorcycle has a structure as shown in FIG. That is, the body is composed of a rotor case 1 and a switch case 11, and a rotor 4 having a key hole 3 into which a key 2 is inserted is rotatably housed in the rotor case 1, while a rotor 4 protrudes from the lower end of the rotor 4. The protrusion 5 is connected to a recess 8 in the center of a rotary plate 7, which has a movable contact piece 6 on the lower surface that rotates together with the rotary plate, so that the inserted key 2, rotor 4, and rotary plate 7 rotate together. Further, a fixed plate 10 having a fixed contact piece 9 on its upper surface, which together with the movable contact piece 6 constitutes a switch mechanism section, is fixed by a switch case 11. On the other hand, the switch case 11 is fixed to the lower end of the rotor case 1 and covers the rotating plate 7 and the fixed plate 10 to prevent rainwater from entering the switch mechanism from the outside. Furthermore, 1
Reference numeral 2 denotes a moderation mechanism in which the rotary plate 7 moves in moderation relative to the switch case 11.

As is clear from the above structure, the switch mechanism of the key switch is designed to prevent rainwater from entering from the outside by the rotor case 1 and switch case 11, which form part of the body. However, waterproofing measures against a small amount of rainwater that enters through the opening of the keyhole 3 are generally not taken. That is, rainwater or the like that enters through the opening of the keyhole 3 descends inside the keyhole 3 and reaches its lower part, and subsequently flows out of the rotor 4 from the lower end, and also spills onto the upper surface of the rotating plate 7 and the switch case 11. It passes through the gap 13 between the switch mechanism and the switch mechanism, which is composed of a movable contact piece and a fixed contact piece.

Therefore, conventional key switches, which do not have structural measures to prevent rainwater from entering through the keyhole, have had problems such as rusting of the switch mechanism and poor contact caused by rainwater etc. over many years of use. It is.

The purpose of the present invention is to improve the conventional key switch as described above so that rainwater, etc. that enters through the opening of the key hole does not reach the switch mechanism, and also to allow the water to flow out of the key switch. The present invention aims to provide a waterproof device for a key switch constructed by the present invention.

The gist of the present invention to achieve the above object is that a rotor is provided with a key hole in the body through which rainwater, etc. flows downward from an opening of the rotor, and a rotor that rotates with the rotation of the rotor. A key switch comprising: a rotating plate connected to the lower end protrusion of the rotor and having a movable contact piece on the lower surface; and a fixed plate having a fixed contact piece on the upper surface, which together with the movable contact piece constitutes a switch mechanism section. An annular groove is formed around the upper end of the lower end protrusion of the rotor, and a shielding plate is provided on the body side to horizontally cross between the rotor and the rotating body, and the shielding plate is arranged at the lower end of the rotor. The body has an opening into which the projection is inserted, and an annular projection fitted around the opening into the annular groove of the rotor, so that the shielding plate receives rainwater etc. flowing out to the outer periphery of the rotor through the key hole. This waterproof device for a key switch is characterized in that water is led out to the outside through a drain hole formed on the side of the key switch.

The key switch with the above configuration consists of a rotating part such as a rotor or rotating plate, and a fixed part such as a rotor case, switch case, or fixed plate.In order to rotate the rotating part with respect to the fixed part, there is a constant distance between them. A gap must be created. Rainwater flowing out from the lower part of the keyhole reaches the switch mechanism through this gap. Therefore, the above-mentioned shielding plate is intended to block the passage of rainwater etc. created by this gap. It is preferable that this shielding plate be made up of a part of the switch case because it is easy to manufacture and structurally, but it may also be made up of a part of the rotor case or other members.

Hereinafter, the present invention will be specifically explained with reference to the embodiments illustrated in FIGS. 2 and 3.

In each figure, the same reference numerals as in FIG. 1 indicate the same members that perform the same functions, and their explanations will be omitted.

This embodiment is a shielding plate made up of a part of the switch case, which receives rainwater flowing out from the lower part of the keyhole of the rotor, and drains the rainwater to the outside from the drain hole provided on the side of the key switch. This is what I did. That is, as shown in FIGS. 2 and 3, an annular groove 2 is formed around the upper end of the lower end projection 5 of the rotor 4.
3 is provided, and an opening 1 is provided so that the protrusion 5 of the rotor 4 can be fitted into the horizontally expanding upper surface of the switch case 11 fixed to the lower end of the rotor case 1.
4, and around the opening, an annular projection 1 that fits into the annular groove 23 of the rotor 4 described above.
5 is set. Further, a plurality of drain holes 16 are provided around the lower end of the rotor case 1 and on the upper surface of the switch case 11 to communicate the inside and outside of the rotor case 1.

Therefore, rainwater etc. that entered through the opening of the keyhole 3 of the rotor 4 flows out from the lower part and is received by the shielding plate, that is, the upper surface of the switch case 11.
The water is discharged to the outside through the drain hole 16 while being guided by the upper surface. Even if some rainwater or the like remains on the upper surface of the switch case 11, it is blocked by the annular protrusion 17 around the annular groove 23 of the rotor 4 and the annular protrusion 15 of the switch case 11 that protrudes into the annular groove 13, Switch case 11 leading to the mechanism part
It does not enter into the gap 13 between the rotating plate 7 and the rotating plate 7.

As is clear from the above description, the key switch waterproofing device according to the present invention uses a horizontally extending shielding plate having an annular protrusion that fits into an annular groove provided at the bottom of the rotor to protect the outer periphery of the rotor through the key hole. Since the rainwater, etc. that flows out is received and led out to the outside through the drain hole formed on the side of the body, rainwater, etc. will never flow into the area around the rotating plate, and therefore, the rotation There is also absolutely no possibility that it will flow into the switch mechanism formed between the plate and the fixed plate. When rainwater, etc. flows over the shield plate, it is possible that the moisture reaches the switch mechanism through the gap between the annular groove of the rotor and the annular protrusion of the shield plate.
Since the path is so long, the ingress of moisture is almost completely prevented. Therefore, this waterproof device completely prevents the switch mechanism from rusting and poor contact due to rainwater, etc., and has a simple structure and is easy to manufacture.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional key switch, Figure 2 is a vertical cross-sectional view of a conventional key switch.
The figure is a longitudinal sectional view of the key switch according to the first embodiment of the present invention, and FIG. 3 is a perspective view of the rotor in FIG. 2. 1... Rotor case, 2... Key, 3... Key hole, 4... Rotor, 5... Rotor protrusion, 6...
Movable contact piece, 7... Rotating plate, 8... Center recess of rotating plate, 9... Fixed contact piece, 10... Fixed plate, 11...
12... Moderation mechanism, 13... Gap, 14... Opening, 15, 17, 16... Drain hole, 23... Annular groove.

Claims (1)

[Claims for Utility Model Registration] (1) A rotor with a key hole in the body through which rainwater, etc. flows downward from an opening in the rotor, and a lower end of the rotor that rotates with the rotation of the rotor. A key switch including a rotary plate connected to a protrusion and having a movable contact piece on the lower surface, and a fixed plate having a fixed contact piece on the upper surface that constitutes a switch mechanism together with the movable contact piece, the lower end of the rotor An annular groove is formed around the upper end of the protrusion, and a shielding plate is provided on the body side to horizontally cross between the rotor and the rotating body, and the shielding plate has an opening into which the lower end protrusion of the rotor is inserted. and an annular protrusion fitted into the annular groove of the rotor around the opening, and formed on the side of the body so that rainwater, etc. flowing out to the outer periphery of the rotor through the key hole is received by the shielding plate. A key switch waterproofing device characterized by draining water to the outside through a drainage hole. (2) In the key switch waterproofing device according to claim 1 of the utility model registration claim, the shielding plate is
It is characterized by being made up of a part of a switch case that forms part of the body.