JPH044327Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) The invention is designed to prevent leakage caused by rainwater in equipment installed in parts that are easily exposed to rainwater, such as neutral start switches. This invention relates to a switch device that has been improved to prevent this.

(Prior Art) Automobile automatic transmissions are equipped with a neutral start switch that rotates in conjunction with the rotation of the select lever. It is located in a position where it is easy to get splashed with rainwater. On the other hand, a connector case having a connection terminal electrically connected to the internal switch is attached to this neutral start switch, and the conductor led out from this connector case is connected to an insulator made of an insulating material. The insulator is connected to a terminal provided on the outside by soldering or the like in advance, and after the connection, the recess formed in the insulator is filled with resin to insulate the conductor and terminal.

(Problem to be solved by the invention) By the way, since the connector case and the resin filled in the insulator are made of different materials,
The rate of expansion differs in response to changes in ambient temperature, and as a result, over time, the connector case and the filled resin will separate, creating minute gaps that allow rainwater to enter the conductor. When the conductor reaches the ground potential of the neutral start switch, electrical leakage occurs between the conductor and the switch case, which is the ground potential of the neutral start switch. Note that the possibility that a gap will occur between the insulator and the filled resin is much smaller than in the case described above, so the possibility that a leak will occur there is also reduced.

Therefore, the purpose of the present invention is to sufficiently prevent rainwater from reaching the conductor and causing leakage even if the connector case and the filled resin separate and a minute gap is created. The purpose of the present invention is to provide a switch device that can prevent this as much as possible.

[Structure of the invention] (Means for solving the problem) The present invention attaches a connector case to a switch body containing a built-in switch, and connects the tip of a conductor led out from the connector case to an insulator of the switch body. The conductor and the terminal are connected to the provided terminal by soldering or the like, and the conductor and the terminal are insulated by filling the recess formed in the insulator with resin, and the conductor led out from the connector case is An insulating part is integrally molded into the connector case so as to cover a predetermined length from the base of the conductor, and a spiral or plural annular uneven part is formed on the outer periphery of the insulating part, and the connector case and filling are formed on the outer periphery of the insulating part. The conductor is characterized in that minute gaps are created between the conductor and the conductor, so that even if rainwater enters the gap, it is difficult for the rainwater to reach the conductor.

(Function) According to the above-described means, since the spiral or plural annular uneven portions are formed on the outer periphery of the insulating portion formed at the base of the conductor, there is a gap between the connector case and the filled resin. Even if rainwater infiltrates through the gap that has occurred, the existence of the uneven portion allows the intrusion path for the rainwater to reach the conductor to be sufficiently long, and therefore the conductor is at ground potential due to the intruding rainwater. Leakage to the case is prevented as much as possible.

(Example) An example of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a switch case, which is the main body of the switch, made of die-cast aluminum, for example, and a switch chamber 2 is recessed in one end surface of the switch case, and an insulator 3 made of an insulating material so as to close the open end of the switch case 1. are fixed in a watertight manner with screws 5 through packing 4. 6
and 7 are switch case 1 and insulator 3
An operating shaft 8 having a connecting portion 8a is rotatably provided in the shaft hole provided in both of the shaft holes. This operating shaft 8 is adapted to be rotated in conjunction with the rotation operation of a select lever (not shown). A movable contact holder 9 is connected to the operating shaft 8 and housed in the switch chamber 2. Two movable contacts 10 and 11 are provided on this movable contact holder and are biased toward the insulator 3 by springs 12 and 12, respectively. . Reference numerals 13 and 14 denote first fixed contacts provided on the insulator 3 to face the movable contact 10, with which the movable contact 10 comes into contact when the select lever is rotated to the "R" position. ing. 15 and 16 are second fixed contacts provided on the insulator 3 so as to face the movable contact 11, and these contact the movable contact 11 when the select lever is rotated to the "P" and "N" positions. I'm starting to do that. And the above movable contact 10,1
Switches 17 and 18 are constituted by the first fixed contacts 13 and 14 and the second fixed contacts 15 and 16. Terminals 19 to 22 project outward from the insulator 3, and are electrically connected to the first and second fixed contacts 13, 14 and 15, 16, respectively. 23 is a rib formed on the outer surface of the insulator 3 so as to surround these terminals 19 to 22, and the portion surrounded by this is a recess 24.
It is said that 25 is a plastic connector case in which, for example, four male terminals 26 are integrated by insert molding, and is fixed to the insulator 3 and switch case 1 with screws via a mounting bracket 27 so that the rear face faces the recess 24. has been done.
Each male terminal 26 is formed by punching out a metal plate using a press to connect the conductor 2.
The conductor 28 is led out from the rear surface of the connector case 25, and each tip of the conductor 28 is connected to the terminals 19 to 22 by soldering. Reference numeral 29 denotes an insulating part made of plastic integrally formed on the connector case 25 so as to cover the conductor 28 over a predetermined length from the lead-out base of the conductor 28, that is, the rear surface of the connector case 25;
5 to 7 forming uneven portions 30 on the outer periphery of these portions.
Annular convex strips 31 are integrally formed at equal intervals. Then, attach the connector case 25 to the switch case 1 and insulator 3, and connect each conductor 2.
After the tip of the conductor 8 is connected to the terminals 19 to 22, the recess 24 is filled with resin 32, and the conductor 28 and the terminals 19 to 22 are insulated and coated with the resin 32. Reference numeral 33 denotes a cylindrical portion formed in the switch case 1 so as to communicate between the inside and outside of the switch chamber 2. A ventilation plug 34 is fitted into this through a rubber cylinder 35, and the outside of the ventilation plug 34 is connected to the cover 3.
Covered by 6. A film 37 having air permeability and water repellency (for example, Gore-Tex (trade name) or a film having similar properties thereto) is caulked and fixed to one end of the ventilation plug 34 via a washer 38.

According to the above configuration, when the connector case 25 and the resin 32 repeatedly contract and expand due to the rise and fall of the ambient temperature, peeling occurs between them and a minute gap is created because the linear expansion coefficients of the two are different. However, in order for the rainwater that has entered through these minute gaps to reach the conductor 28, a plurality of protrusions are required along the joint between the insulating part 29 and the resin 32. Therefore, the intrusion route for rainwater entering through the gap to reach the conductor 28 is larger than that without the insulating part 29, and the insulating part 29 is provided. Therefore, even if a gap occurs and rainwater enters the gap, the conductor 28 will leak through the rainwater to the switch case 1 at the ground potential. Such things will be prevented as much as possible.

In the above structure, a plurality of protrusions 31 are formed around the outer periphery of the insulating part 29 in order to form the uneven part 30, but instead of this, a spiral protruding part 31 is formed on the outer periphery of the insulating part 29. Even if a small gap is formed between the connector case 25 and the resin 32, the path for rainwater to enter can be lengthened, and even if rainwater enters the gap between the connector case 25 and the resin 32, the conductor 28 can be Leakage of rainwater to the switch case 1, which is at ground potential, is prevented as much as possible.

[Effects of the invention] As is clear from the above description, the present invention forms an insulating part by covering the conductor led out from the connector case over a predetermined length from the lead-out base, and Since the outer periphery has a spiral or multiple annular unevenness, even if the connector case and the filled resin separate and a minute gap is created, rainwater will not flow into the conductor. It is possible to provide a switch device that can sufficiently prevent leaks from occurring and can prevent leaks as much as possible.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an enlarged vertical sectional view of the main parts, FIG. 2 is a side view with the resin removed, FIG. 3 is a vertical sectional view, and FIG. 3 is an enlarged sectional view of the portion shown in FIG. 5, FIG. 5 is a plan view of the insulator, and FIG. 6 is a perspective view of the connector portion. In the drawing, 1 is the switch case (switch body),
2 is the switch chamber, 3 is the insulator, 17,1
8 is the switch, 19 to 22 are the terminals, 24
is a recess, 25 is a connector case, 28 is a conductor, 2
9 is an insulating part, 30 is an uneven part, 31 is a convex part, 32
is resin.

Claims (1)

[Scope of utility model registration request] A connector case is attached to a switch body that has a built-in switch, and the tip of a conductor led out from the connector case is connected by soldering or the like to a terminal provided on an insulator of the switch body. The conductor and the terminal are insulated by filling the recess with resin, and the conductor led out from the connector case is integrated into the connector case so as to cover a predetermined length from the base of the conductor. A switch device comprising a molded insulating part and a spiral or plural annular concavo-convex part formed on the outer periphery of the insulating part.