JPH09223435A - Inhibitor switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To seal a connection part of a conductive wire of an insulator-coated electric wire of an inhibitor switch and a projected part of a terminal within a short time and lessen the number of the part items of the inhibitor switch by using an infection molded body of a hot melt resin. SOLUTION: A conductive wire 5A of an insulator-coated electric wire 5 is connected with a projected part 4A of a terminal 4 projected out of a plate 3 by ultrasonic welding. The connected part is sealed by an injection-molded body 6 made of a hot melt resin, etc. A plurality of insulator-coated electric wires 5 are bundled by a bundling member 7 and the end part 7A of the bundling member 7 is buried in the inside of the injection-molded body 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inhibitor switch for detecting a range switching position of a transmission of a vehicle, and more particularly to a technique for improving an inhibitor switch having an insulation covered wire.

[0002]

2. Description of the Related Art Conventionally, there has been an inhibitor switch for detecting a range switching position of a transmission of a vehicle. The inhibitor switch has a structure in which a movable plate having a movable contact piece is connected to a manual valve, a shift lever or the like of the transmission, and the movable contact piece comes in contact with or separates from a fixed contact according to a range switching position of the transmission. There is. Then, the electric signal is input to the control circuit using the connector. There are two types of connectors, one of which is directly attached to the inhibitor switch and the other of which is connected to the inhibitor switch through an insulating coated electric wire. The latter type of inhibitor switch
For example, there is one disclosed in Japanese Utility Model Publication No. 54-3335. The inhibitor switch shown in this utility model publication connects the tip of a conductor covered with an insulation-coated wire to a fixed contact, seals the connection with epoxy resin, and bundles and protects multiple insulation-coated wires with a tube. Then, the tube is pressed by a pressing member, and the pressing member is fastened to the inhibitor switch by a plurality of screws.

[0003]

However, the latter inhibitor switch of the prior art described above, that is, an inhibitor switch using an insulation-coated electric wire, has a structure in which a connecting portion with a conductor is sealed with a sealant such as an epoxy resin. Therefore, it takes several hours to cure the sealant,
There was a drawback that workability was poor. Moreover, in order to fix the tube to the inhibitor switch, parts such as a press fitting and a plurality of screws are required, and it takes a lot of man-hours to manage the parts, or the number of parts increases the cost of the inhibitor switch. There was a drawback.

The present invention is intended to solve the above-mentioned problems, and an object thereof is to provide an inhibitor switch which has improved workability by not using a sealant having poor workability and which has a reduced number of parts. It is a thing.

[0005]

In order to solve the above-mentioned problems, first of all, the invention according to claim 1 is such that a movable contact piece which is displaced corresponding to a range switching position of a transmission and the movable contact piece are brought into contact with and separated from each other. Inhibitor switch, comprising: a fixed contact, a terminal integrally formed with the fixed contact, one end of which protrudes from the pole board to the outside, and an insulation-coated electric wire in which a conductor is electrically connected to the terminal and the protruding portion. The present invention provides an inhibitor switch, characterized in that a connecting portion between a protruding portion of the terminal and a conductor wire of an insulation-coated electric wire is sealed with an injection molded body.

The invention according to claim 2 provides an inhibitor switch characterized in that the material of the injection-molded body is a hot-melt resin.

According to a third aspect of the present invention, there are a plurality of the insulation-coated electric wires, the plurality of insulation-coated electric wires are bound by a binding member, and an end portion of the binding member is inside the injection molded body. Provided is an inhibitor switch, which is characterized by being buried in the.

The invention according to claim 4 provides an inhibitor switch characterized in that the projecting portion of the terminal and the conductor wire of the insulation-coated electric wire are connected by ultrasonic welding.

[0009]

Embodiments of the present invention will be described with reference to the accompanying drawings. Reference numeral 1 in the drawing denotes a movable contact piece. The movable contact piece 1 is held by a movable platen 8 fitted to a lever 9, and corresponds to the range switching position when the lever 9 connected to the manual valve and the shift lever swings by the range switching. The fixed contact 2
Slide on top.

Reference numeral 2 is a fixed contact. The fixed contact 2
Is a contact plate formed by pressing a metal plate, and is formed on the inner surface of the pole board 3 in a predetermined arrangement so that the movable contact piece 1 is brought into contact with and separated from the movable contact piece 1 in correspondence with the range switching position. It is exposed.

Reference numeral 4 is a terminal. The terminal 4 is formed integrally with the fixed contact 2,
Insert molding is performed on the pole board 3. Then, one end of the terminal 4 is projected from the pole board 3 to the outside to form a protruding portion 4A. The protrusion 4A has an upper surface 4B as shown in FIG.
The lower surface 4C is an empty space, and the left end 4D and the right end 4E
Are supported by a support wall 3A formed integrally with the pole board 3. The insulation-coated electric wire 5 is provided on the upper surface 4B of the protruding portion 4A.
5A of the above, the ultrasonic welding horn (not shown) is pressed against the upper surface 4B side, and the lower surface 4C is installed on a pedestal (not shown), and the horn is vibrated to lead the protruding wire 4A. 5A is crimped.

The connection between the projecting portion 4A and the conducting wire 5A is sealed with an injection molded body 6. The injection molded body 6
Is a nylon-based synthetic resin called a so-called hot melt resin (for example, maker name: Henkel Shiramizu Co., Ltd./trade name: Macromelt, etc.), and the above sealing treatment is performed using an injection molding die. The hot-melt resin is a resin that is injected into an injection-molding die, cools the die, and takes out a molded product from the die, that is, a resin having a cooling and solidifying time of about 2 minutes and an appropriate elasticity. Have sex.

There are a plurality of the insulation-coated electric wires 5, the plurality of insulation-coated electric wires 5 are bound by a binding member 7, and the end portion 7A of the binding member 7 is embedded in the injection molded body 6. To Therefore, when setting the connection portion between the projecting portion 4A and the conductive wire 5A in the injection space (not shown) of the injection molding die described above, the end portion 7A of the binding member 7 is also set in the injection space at the same time. To do. In order to prevent the molten resin injected into the injection space from squirting into the gap generated between the binding member 7 and the insulating covered electric wire 5, for example, the end portion 7A
It is advisable to close the vicinity of with a mold to close the jetting path of the molten resin.

A cover 10 is ultrasonically welded to the electrode plate 3 to form a sealed space in which the movable contact piece 1 and the fixed contact 2 are housed. The other end of the insulation-coated electric wire 5 has a connector 11
Are electrically connected to each other, and the connection point is sealed with an injection molded body 12 made of the same material as the injection molded body 6. Further, the insulating coated electric wire 5 is fixed to the support wall 3A in the vicinity of the connection portion between the protruding portion 4A and the conducting wire 5A by using the holder 13 made of synthetic resin.

[0015]

As described above, the present invention connects the protruding portion of the terminal protruding from the electrode plate of the inhibitor switch and the conductor wire of the insulation-coated electric wire by ultrasonic welding or the like,
Since the connection point is sealed with an injection-molded body made of a material such as hot-melt resin, it is possible to seal the connection point in a short working time of about several minutes to form a watertight structure. Not only is the performance significantly improved, but the number of parts can be reduced. In addition, since a plurality of insulation-coated wires are bound by a binding member and the end of the binding member is buried inside the injection molded body, the end of the insulation-coated wire is also secured inside the injection molded body accordingly. The end of the insulation-coated wire can be held by the injection molded body without using parts such as grommets, and it was used in the prior art to fix the binding member to the inhibitor switch. No pressing metal fittings or parts such as screws are required.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view in which a main part of the one shown in FIG. 1 is cut away.

FIG. 3 is a cross-sectional view taken along the line AA of the arrow shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 movable contact piece 2 fixed contact point 3 pole board 3A support wall 4 terminal 4A protruding part 4B upper surface 4C lower surface 4D left end 4E right end 5 insulating coated electric wire 5A conducting wire 6,12 injection molded body 7 binding member 7A end 8 movable plate 9 lever 10 Cover 11 connector

Claims (4)

[Claims] 1. A movable contact piece (1) which is displaced corresponding to a range switching position of a transmission, a fixed contact (2) which is brought into contact with and separated from the movable contact piece (1), and the fixed contact (2). A terminal (4) which is integrally formed and has one end protruding from the pole board (3) to the outside, and an insulated coated electric wire (5A) electrically connected to the protruding portion (4A) of the terminal (4) ( 5), the injection switch (6) is provided with a connection point between the protruding portion (4A) of the terminal (4) and the conductor wire (5A) of the insulation-coated electric wire (5).
Inhibitor switch characterized by being sealed by. 2. The inhibitor switch according to claim 1, wherein the material of the injection-molded body (6) is a hot-melt resin. 3. The invention according to claim 1 or 2, wherein there are a plurality of the insulation-coated electric wires (5), and the plurality of insulation-coated electric wires (5) are bound by a binding member (7), and An inhibitor switch, characterized in that the end portion (7A) of the binding member (7) is buried inside the injection molded body (6). 4. The invention according to claim 1, 2 or 3, wherein the protruding portion (4A) of the terminal (4) and the conductor wire (5A) of the insulation-coated electric wire (5) are connected by ultrasonic welding. Inhibitor switch characterized by.