JPH044328Y2 - - 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 location 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 lower than in the case described above, so the possibility that a leak will occur there is also reduced.

Therefore, the first purpose of the present invention is to improve the adhesive strength between the connector case and the filled resin to prevent the filled resin from peeling off from the connector case and creating minute gaps as much as possible. To provide a switch device that can prevent rainwater from reaching a conductor and causing a leak.

In addition to the first objective, the second objective of the present invention is to improve the adhesive strength between the insulator and the filled resin, thereby reducing the possibility of peeling between the insulator and the filled resin. It also prevents
The purpose is to further reduce the possibility of leaks occurring.

[Structure of the invention] (Means for solving the problem) In the present invention, a concave portion is formed in the insulator of a switch body containing a built-in switch, and a connector case is attached to the switch body so as to face the concave portion. The tip of the conductor led out from the connector case is connected to the terminal provided in the recessed part by soldering or the like, and the conductor and the terminal are insulated by filling the recessed part with resin. In the connector case, an insulating part is integrally formed on the connector case so as to cover the conductor led out from the connector case over a predetermined length from the base of the conductor, and the surface of the insulating part is roughened in advance with a glass shot or the like. The first feature is that the adhesion strength between the filled resin and the insulating part is greatly improved.

Furthermore, in addition to this, the second feature is that a similar roughened portion is formed on the surface of the recessed portion to improve the adhesion strength between the filled resin and the insulator.

(Function) According to the above-mentioned means, the adhesion strength between the insulating part of the connector case and the filled resin is greatly improved, so even if expansion and contraction are repeated due to changes in the ambient temperature, the filled resin remains intact. It is possible to prevent as much as possible the resin from peeling off from the insulating part and the generation of minute gaps, and rainwater is sufficiently prevented from reaching the conductor through the minute gaps and leaking into the switch body which is at ground potential.

Furthermore, since the adhesion strength between the insulator and the filled resin is improved, the possibility of leakage occurring here can also be reduced.

(Example) The following is an example of the present invention shown in Figures 1 to 5.
This will be explained with reference to the figures. 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 2. are fixed in a watertight manner with screws 5 through packing 4. Reference numerals 6 and 7 indicate shaft holes provided in both the switch case 1 and the insulator 3, into which an operating shaft 8 having a connecting portion 8a is rotatably provided. This operating shaft 8 is adapted to be rotated in conjunction with the rotation operation of a select lever (not shown). 9 is connected to the operating shaft 8 and is connected to the switch chamber 2.
A movable contact holder is housed in the movable contact holder, and two movable contacts 10 and 11 are provided in this movable contact holder and are biased toward the insulator 3 by springs 12 and 12, respectively. 13 and 14 are movable contacts 10
This is a first fixed contact provided on the insulator 3 so as to face the movable contact 10 when the select lever is rotated to the "R" position. 15 and 16
is a second fixed contact provided on the insulator 3 so as to face the movable contact 11;
This contacts the movable contact 11 when the select lever is rotated to the "P" and "N" positions. Then, the above movable contacts 10, 11 and the first fixed contacts 13, 1
4 and second fixed contacts 15 and 16 constitute switches 17 and 18. 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. Reference numeral 23 denotes 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 recessed portion 24. 25 is a plastic connector case in which, for example, four male terminals 26 are integrated by insert molding, and each male terminal 26 has a structure in which a metal plate is punched out with a press and a conductor 27 is integrated. It is led out from the rear surface of the connector case 25. Reference numeral 28 denotes an insulating part made of plastic integrally formed on the connector case 25 so as to cover the conductor 27 over a predetermined length from the lead-out base of the conductor 27, that is, the rear surface of the connector case 25. Seven to seven annular protrusions 29 are integrally formed at equal intervals. After the connector case 25 is molded, the outer periphery of the insulating part 28 is honed using, for example, a glass shot, and the outer surfaces of the insulating part 28 and the convex strips 29 are roughened with fine irregularities (not shown). It is formed. The connector case 25 manufactured in this manner is screwed and fixed to the insulator 3 and the switch case 1 via the mounting bracket 30 so that the rear surface faces the recessed part 24, and the conductor 27
The tips of each are connected to terminals 19 to 22 by soldering. Then, the connector case 25 is attached to the switch case 1 and the insulator 3, and the tips of each conductor 27 are connected to the terminals 19 to 22.
After connecting to the conductor 27 and the terminal 1, the recess 24 is filled with resin 31, and the resin 31 connects the conductor 27 and the terminal 1.
9 to 22 are insulated.

According to the above configuration, when the connector case 25 and the resin 31 repeatedly contract and expand due to the rise and fall of the ambient temperature, the linear expansion coefficients of the two are different, so that there is a gap between the insulating part 28 of the connector case 25 and the resin 31. However, since the outer surfaces of the connector case 25 and the insulating part 28 are roughened by honing, the roughened surface has fine irregularities.
The resin 31 is now firmly adhered to the insulating part 28, and the degree of adhesion is greatly improved compared to the case where honing is not performed. The occurrence of peeling and the formation of minute gaps is prevented as much as possible. For this reason, rainwater enters the conductor 27 through minute gaps.
is now sufficiently prevented from reaching the
This prevents the conductor 27 from leaking into the switch case 1 at ground potential due to rainwater as much as possible.

It is generally sufficient to perform honing on the outer surfaces of the connector case 25 and the insulating section 28, but in order to ensure further honing, it is necessary to honing the insulator 3.
After the insulator 3 is molded, the surface of the concave portion 24 is honed using, for example, a glass shot, and a roughened portion having fine irregularities (not shown) is formed on the surface of the concave portion 24, thereby making it possible to bond the insulator 3 and the resin 31. By improving the adhesive strength between the two, it is possible to prevent peeling therefrom and further reduce the possibility of leakage.

In the above configuration, since a plurality of protrusions 29 are formed around the outer periphery of the insulating part 28, the presence of these protrusions 29 reduces the adhesive strength between the insulating part 28 and the filled resin 31. Although it is possible to further improve this, the protruding portion 29 may be provided as necessary. Further, even if a plurality of circular or rectangular convex portions 32 or 33 as shown in FIG. resin 3
It is possible to improve the adhesion strength with 1.

[Effects of the invention] As is clear from the above description, the present invention provides a rough surface having fine irregularities on the outer surface of the insulating part that covers the base of the conductor formed in the connector case, and also on the recessed part of the insulator. Since the processed part is formed, the adhesive strength between the insulating part or insulator provided in the connector case and the filled resin is improved, and the filled resin peels off from the insulating part or insulator of the connector case, causing fine particles. It is possible to provide a switch device that can prevent the occurrence of large gaps as much as possible, and can prevent rainwater from reaching the conductor and causing leaks.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the present invention, with Figure 1 being an enlarged longitudinal sectional view of the main parts, Figure 2 being a side view with the resin removed, and Figure 3 being a longitudinal sectional view. , 4th
FIG. 5 is a perspective view of the connector case, FIG. 5 is a plan view of the insulator, and FIGS. 6 and 7 are partial side views showing other embodiments of the present invention. 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
25 is a connector case, 27 is a conductor,
28 is an insulating part, 29 is a convex part, 31 is a resin, 3
2 and 33 are convex portions.

Claims (1)

[Claims for Utility Model Registration] 1. A concave portion is formed in the insulator of a switch body incorporating a switch, and a connector case is attached to the switch body so as to face the concave portion, and a conductor led out from the connector case. The tip of the conductor is connected to a terminal provided in the recessed part by soldering or the like, and the recessed part is filled with resin to insulate the conductor and the terminal, wherein An insulating part is integrally molded on the connector case so as to cover the conductor over a predetermined length from the base of the conductor, and a roughened part is previously formed on the surface of the insulating part by glass shot or the like. Switch device. 2 Utility Model Registration The switch device according to claim 1, further comprising forming a roughened portion on the surface of the recessed portion in advance by glass shot or the like.