JPH0119772Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a switch device used in an environment where muddy water and dust are likely to be splashed during use, such as a neutral safety switch in an automatic transmission. To provide a switch device which is easy to manufacture and has excellent durability even when used in an environment where it is easily exposed to heat.

An embodiment in which the present invention is applied to a neutral safety switch for an automatic transmission will be described below with reference to the drawings. 1 is an insulator board pre-molded into a flat shape from synthetic resin, and fixed contacts "PB", "RB",
"NB", "DB", "2B", and "LB" are arranged in an arc shape with a predetermined interval from each other, and a fixed contact "E" is arranged parallel to these, and a fixed contact "E" is arranged in parallel with them. ”, fixed contacts “N” and “B” are arranged in an arc shape, respectively. And the above fixed contacts "E", "PB", "RB",
"NB", "DB", "2B", "LB", "N", and "B" each have a protruding shaft portion 2 that penetrates the insulator board 1, and the other side of the insulator board 1. Lug plates 3 and 4 as connection terminals are caulked and fixed to the tip of each shaft portion 2. Reference numeral 5 denotes a protrusion integrally formed on the peripheral edge of the insulator board 1, and two fitting grooves 6, 6 are provided here. 7 and 8 are band-shaped connecting conductors formed by press punching and bending a brass plate, for example, and each has an extension portion 7 at one end.
a, 8a are provided, and connector terminal portions 7b, 8b are provided at each other end. When the bases of the connector terminal parts 7b, 8b are fitted into the fitting grooves 6, 6, the connecting conductors 7, 8 are connected to each extending part 7.
Each shape is determined so that the tips of a and 8a are in contact with or very close to lug plates 3 and 3 electrically connected to fixed contacts "N" and "B". Reference numeral 9 denotes a spacer made of, for example, synthetic resin that comes into contact with the convex portion 5 and holds the connecting conductors 7, 8 in the fitting grooves 6, 6. It has a positioning protrusion 9a that is fitted into a recess 6a provided in the fitting groove 6 through the fitting holes 7c and 8c, and seven grooves 9b on the other side.
have. 10 to 16 are band-shaped connection conductors formed by press punching and bending, for example, a brass plate, each having an extension portion 10a at one end.
Connector terminal portions 10b to 16b are provided at each other end. and,
These connecting conductors 10 to 16 are connected to the connector terminal section 1.
When the bases of 0b to 16b are fitted into the grooves 9b, the tips of the extended portions 10a to 16a correspond to the fixed contacts "PB", "RB", "E", "DB", "2B",
Each shape is determined so as to be in contact with or very close to the lug plates 4, 4 electrically connected to "LB". The extension portions 7 that have come into contact with each other or are in close proximity to each other as described above
The tips of the extensions 10a to 16a and the lug plates 3 and 4 are electrically connected to each other by soldering or brazing, for example. (See Figure 4). Reference numeral 17 denotes a holder made of synthetic resin, for example, and the fitting holes 17a, 17a are fitted into convex portions 9c protruding from the spacer 9, thereby holding the connecting conductors 10 to 16 in the grooves 9b. There is.

The insulator board 1, on which the connection conductors 7, 8, 10 to 16, etc. are assembled in the manner described above, is housed inside the mold, and a synthetic resin made of the same material as the insulator board 1 is surrounded by the insulator board 1. The insulator body 18 is integrated by insert molding. This insulator body 18 is formed into a substantially fan shape, and each fixed contact "E",
"PB", "RB", "NB", "DB", "2B", "LB",
Position the shaft hole 1 at the center of each arc of “N” and “B”.
9 is integrally molded and has a total of six through holes 20 for fixing in the peripheral portion and the convex portion 5,
The other side surface of the insulator board 1 is covered with a predetermined thickness, and each connection terminal part 7b, 8b and 10b to 1
The connecting conductors 10 to 16 except for 6b, the lug plates 3 and 4 connected to these, and their connection parts are buried, and the insulator main body 21 is constructed by the cooperation of the insulator body 18 and the insulator board 1. It consists of 22 is integrally connected to the periphery of the spacer 9 and the holder 17, and each connection terminal portion 7b, 8b and 10b to 16
A connector case portion surrounding b is insert-molded at the same time as the insulator body 18 is molded, and is integrated with the insulator body 18 as well as with the convex portion 5 of the insulator board 1. Reference numeral 23 denotes a slit-shaped drain hole formed in the side surface of the connector case portion 22 so as to communicate with the inside. Reference numeral 24 denotes a substantially fan-shaped switch cover manufactured by integral molding of aluminum die-casting or thermoplastic resin, and a switch chamber 25 having a shape substantially facing the insulator board 1 is provided on one end surface of this switch cover.
A depression has been formed. 26 is switch cover 2
a shaft hole formed to face the shaft hole 19 in 4;
27 is a through hole 20 in the periphery of the switch cover 24.
With a total of 6 screw holes formed to face the
The insulator main body 21 and the switch cover 24 are brought into contact with each other through a sealing member (not shown) on one side, and a screw is inserted into the screw hole 2 through the through hole 20.
It is integrated by screwing into 7. Now, 2
Reference numeral 8 denotes a rotating arm in which a shaft cylinder part 30 is formed at one end of the arm part 29, and this is achieved by rotatably supporting the shaft cylinder part 30 in the shaft holes 19 and 26 via a sealing member (not shown). The arm portion 29 is movable within the switch chamber 25. 31 and 32 are movable contacts disposed on the surface of the arm portion 30 facing the insulator board 1, and these are urged toward the insulator board 1 by a coil spring 33, respectively. The movable contact 31 is always in sliding contact with the fixed contact "E" and is selected as the fixed contact "PB", "RB", "DB", "2B", and "LB" according to the rotation of the rotating arm 28. Further, the movable contact 32 is brought into contact with the fixed contacts "N" and "B" only in the positions 〓P〓 and 〓N〓. Therefore, the surface of the fixed contact "N" is cut out in a portion corresponding to the range of the 〓R〓 position, so that "N" and "B" are not electrically connected in the 〓R〓 position. In addition, 34 is the shaft cylinder part 3
3 is an oval-shaped fitting hole formed on the inner surface, into which a shift control shaft of an automatic transmission or a control shaft rotated in synchronization with the shift control shaft is fitted. 35 is a mating connector connected to the connector case portion 22 so as to fit over the connector case portion 22.

When the select lever inside the vehicle is operated by the driver, the above-mentioned shift control shaft is rotated, and the automatic transmission shifts to P, as is well known.
It is shifted to each position of 〓R〓, 〓N〓, 〓D〓, 〓2〓, and 〓L〓, and the rotation angle of the rotation arm 28 changes according to this shift operation, and the arm part 29 moves toward the insulator board. 1 within the switch chamber 25. Fixed contacts "PB", "RB",
"NB", "DB", "2B", "LB" and "E" are electrically connected by the movable contact 31, and the fixed contacts "N" and "B" are connected only in the positions 〓P〓, 〓N〓 as above. Conductivity is established by the movable contact 32 as shown in FIG.

By the way, in the conventional type, a plurality of fixed contacts are arranged on one side of the insulator, and a lug plate that is electrically connected to the fixed contacts is attached to the other side of the insulator, and after connecting the lead wire to each lug plate, the corresponding Insulating molten resin is poured into the recess formed in the insulator to cover the connection between the lead wire and lug plate and solidified, but it takes a considerable amount of time to solidify the molten resin. It is difficult to manufacture and has poor workability, and products poured and solidified in this way tend to have cracks and gaps at the boundary with the mating member, and when used in an environment where muddy water or dust is likely to get on them, the internal parts may be damaged. Muddy water and dust may enter the connection part and corrode the connection part, resulting in poor durability. In addition, this kind of device requires the work of attaching a connector to the end of the lead wire, making it cumbersome to manufacture.

However, in the above configuration, the insulator board 1 and the insulator body 18 are integrated by insert molding to form the insulator body 21, and the connector case part 2 is also attached to the insulator body 18 by insert molding at the same time.
2 is formed, so there is a gap between the two,
There is no risk of cracking, and the material is cooled and solidified in the mold within a short time, so workability is greatly improved and manufacturing is easy. In addition, the connector terminal part 7
b, 8b, 10b to 16b and the lug plates 3, 4 are embedded in the insulator body 21, which is integrated by insert molding, so even if it is used in an environment where muddy water or dust is likely to splash, the muddy water will This completely prevents dirt and dust from entering the connection parts, resulting in extremely high durability. Further, there is no need to attach a separate connector, making manufacturing extremely easy.

As is clear from the above description, the present invention can provide a switch device that is easy to manufacture and has excellent durability even when used in an environment prone to muddy water or dust.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is an exploded perspective view, Fig. 2 is a front view of the insulator board alone, Fig. 3 is an exploded perspective view showing the assembly process of the insulator board, and Fig. 4 is an exploded perspective view. The figure is a rear view of the insulator board in an assembled state, and FIG. 5 is a perspective view of the insulator main body. In the drawing, 1 is an insulator board, 3 and 4 are lug plates (connection terminals), 7, 8, and 10 to 1.
6 is a connecting conductor, 7b, 8b and 10b to 16b are connector terminal parts, 18 is an insulator part, 2
1 is the insulator body, 22 is the connector case part, 24 is the switch cover, 25 is the switch chamber,
28 is a rotating arm, and 31 and 32 are movable contacts.

Claims (1)

[Scope of utility model registration request] An insulator board with a plurality of fixed contacts arranged on one side, a connection terminal provided on the other side of the insulator board and electrically connected to the fixed contacts, and arranged along the other side of the insulator board. a connecting conductor having one end connected to the connection terminal and a connector terminal portion protruding outward from the periphery of the insulator board at the other end; an insulator body that is integrally provided and forms an insulator main body by embedding the connection portion between the connection terminal and the connection conductor in cooperation with the insulator board; and the connector that is insert-molded at the same time as the insulator body is molded. a connector case portion formed to surround a terminal portion, and a switch cover forming a switch chamber for accommodating a movable contact that can be selectively contacted with the fixed contact on one side of the insulator body. A switch device characterized by the fact that it is worn.