JPH0215526A - Manufacture of kill switch - Google Patents

Abstract

PURPOSE:To decrease forming manhour by forming a tapered face in the internal surface of a housing as well as having a conducting board pushed into the space and its tip bent along the tapered face so as to form a fixed contact. CONSTITUTION:A tapered face 12 inclining to the moving direction of a moving contact 5 is formed in the internal surface of a housing as well as a conducting board 11 is pushed into the space. A fixed contact 11 is formed by having at least the tip of the conducting board 11 bent along the tapered face 12. Thus, while being guided along the tapered face 12, at least the tip of the conducting board 11 is bent toward the moving direction of the moving contact 5 so as to form the fixed contact of the fixed form. As a result, the forming process of a fixed contact can be omitted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a kill switch used to stop the engine of a vehicle such as a snowmobile or a buggy or a motor boat, and in particular has a movable contact and a bent tip. The present invention relates to a method for manufacturing a kill switch in which a fixed plate-shaped contact is provided in a housing.

[Prior Art] A kill switch is generally known that includes a movable contact movably housed in a housing and a plate-shaped fixed contact whose tip, which the movable contact contacts and separates, has a bent shape.

To assemble such a kill switch, a fixed contact is previously formed into a predetermined bent shape from a plate-shaped conductor by press molding or the like.

[Problems to be Solved by the Invention] According to the above method, it is necessary to mold the fixed contact into a predetermined shape before incorporating it into the housing, which increases the number of man-hours accordingly.

Therefore, an object of the present invention is to provide a method for manufacturing a kill switch that can reduce the number of man-hours.

[Means for Solving the Problems] In order to solve the above problems, a method for manufacturing a kill switch according to the present invention includes forming a space in a housing, accommodating a movable contact movably into the space, and By forming a tapered surface that slopes in the moving direction of the movable contact on the inner surface of the housing in the space, pushing a plate-shaped conductor into the space, and bending at least the tip of the plate-shaped conductor along the tapered surface. It is characterized by forming a fixed contact.

[Operation of the invention] Since a tapered surface is formed on the inner surface of the housing,
When the tip of the plate-shaped conductor is pushed into the space of the housing toward this tapered surface, at least the tip of the plate-shaped conductor is guided along the tapered surface and bent in the direction of movement of the movable contact, fixing it in a predetermined shape. It becomes a point of contact.

[Example] An embodiment of the present invention is shown in FIGS. 1 and 2. FIG.

FIG. 1 is a longitudinal cross-sectional view of the kill switch, and the housing 1
A contact accommodation space 2 is formed inside. A base 3 is attached to one end 1a of the housing 1 so as to close one end of the contact accommodation space 2. In addition, one end 1
A stepped portion 1b is formed on the inner circumferential surface of a, and the base 3 is positioned here.

A shaft 4 made of a conductor is supported by a shaft extending through the housing 1 so as to be movable forward and backward. 1st
In the figure, numerals 4a and 4b are seal rings, and 4c is a groove for a grease reservoir.

A disk-shaped movable contact 5 is attached to the end of the shaft 4 accommodated in the contact accommodation space 2 . The movable contact 5 is loosely fitted to the tip of the shaft 4 and is biased by a contact spring 6 to generate contact pressure. Further, the movable contact 5 is prevented from falling off by a stopper 5a attached to the distal end side of the shaft 4, and is urged upward in FIG. 1 by a return spring 7 which is in contact with the stopper 5a at one end. The other end of the shaft 4 protrudes outward from the housing 1 and abuts against the inner surface of the mounting portion 8a of the handle 8.

As a result, the shaft 4 is prevented from moving upward, and the movable contact 5
is stopped in a neutral position. One end of a string 9 is attached to the handle 8, and the other end is attached to the body of an occupant (not shown).

The attachment part 8a attached to the neck IC of the housing 1 is
It has a cap shape that opens downward, and is fitted around the neck portion 1c so that it can be slid in the vertical direction in the figure.

Reference numerals 1d and 8b indicate stoppers that are bulged at the tips of the neck IC and the attachment portion 8a, respectively. This allows the attachment portion 8a and the neck portion 1c to rotate relative to each other, but the attachment portion 8a is prevented from easily falling off from the neck portion IC.

Furthermore, a pair of first fixed contacts 10 and a pair of second fixed contacts 11 are each implanted in the base 3. The first fixed contact 10 and the second fixed contact 11 are made of the same plate-shaped conductor member, and are formed by bending both ends of the same plate-like conductor member in the same direction with different heights. It is inserted into base 3.

The first fixed contact 10 extends from the base 3 toward the movable contact 5, and its free end can come into contact with and separate from the side surface of the movable contact 5 facing the base 3.

On the other hand, the second fixed contact 11 extends upward from the base 3 along the inner wall surface of the housing 1, past the movable contact 5, and has a free end bent toward the shaft 4 in a tapered manner. It has a tapered shape. This second fixed contact 11 is formed along a tapered wall surface 12 (see FIG. 2) formed on the inner wall surface of the housing 1.

This tapered wall surface 12 is inclined in the axial direction of the shaft 4, that is, in the moving direction of the movable contact 5, and is formed at a connecting portion between the contact housing space 2 and the shaft hole.

The first fixed contact 10, the second fixed contact 11, and the shaft 4 each serve as a kill switch terminal in a closed circuit (not shown).

Therefore, when the shaft 4 is moved downward in the state shown in FIG. 1, for example, the movable contact 5 comes into contact with the first fixed contact 10 against the return spring 7, turning on the switch and closing a predetermined circuit.

On the other hand, when the shaft 4 is pulled upward by the handle 8, the shaft 4 moves upward against the first return spring 6, and the periphery of the movable contact 5 is formed at the tip of the second fixed contact 11. It slides into contact with a part of the taper and turns on.

Therefore, if this kill switch is used, the mounting part 8a
When the occupant moves far away from the predetermined position, the attachment part 8a falls off from the neck IC by the string 9 attached to the occupant at the negative end, both of which are switched on (not shown). It is designed to stop the engine.

Moreover, since the second fixed contact 11 is tapered toward the shaft 4, the contact between the movable contact 5 and the second fixed contact 11 is made on the slope of the second fixed contact 11. Therefore, a shift occurs during contact, and the contact portion can be wiped due to this shift, so that the contact connection can be ensured.

In particular, even if the second fixed contact 11 side is not used for a long period of time, contact connection can be made reliably, which is extremely effective. Note that the reference numeral 13 in Fig. 1 indicates the base 3.
This is an insulating layer that is potted after the is attached to the housing 1.

Next, a method for forming the second fixed contact 11 will be explained. Second
As shown in the figure, first, an insert molded product A consisting of the first fixed contact 10, the second fixed contact 11, and the base 3 is molded in advance. At this stage, initially, the second fixed contact 1
1 extends straight upward from the base 3 parallel to the first fixed contact 10. Therefore, insert molding can also be performed relatively easily.

On the other hand, since the upper end 1a of the housing 1 is still open, the shaft 4 is inserted into the contact housing space 2 from this opening side, and the insert molded product A is inserted into the first fixed contact 10 and the second fixed contact. Push the contact point 11 into the contact accommodation space of the housing 1 from the same direction as the shaft 4. Then, as the insert molded product A is pushed in, the free end of the second fixed contact 11 is guided by the tapered surface 12 of the housing 1 and bent in the direction of the shaft 4.

Note that the thickness of the plate material constituting the second fixed contact 11 is set in advance so that it is relatively easy to bend. Eventually, when the base 3 reaches the stepped portion 1b on the inner circumferential surface of the housing 1, it is positioned, and the base 3 no longer enters into the housing 1. At this time, the first fixed contact 10 is located near the surface of the opening 5 on the base 3 side with a predetermined interval, and the free end of the second fixed contact 11 has a tapered tip as shown in FIG. It is bent into a corner shape and is also located above the surface opposite to the opening 5 with a predetermined spacing therebetween.

Thereafter, an insulating layer 13 is bonded to the exposed surface of the base 3, a handle 8 is attached to the neck IC of the housing 1, and the handle 8 is integrated with the end of the shaft 4, thereby forming the kill switch shown in FIG. . In addition, the reference numeral 1 is shown in Figure 2.
If the connecting portions of the plate-shaped conductor member 4 with the first fixed contact 10 and the second fixed contact 11 are connected, the base 3
If the insert is molded and then cut, a two-circuit kill switch can be created instantly.

[Effects of the Invention] According to the present invention, in order to attach the plate-shaped conductor to the housing, at the same time as the plate-shaped conductor is pushed into the housing, at least the tip portion of the plate-shaped conductor is bent by the tapered surface and becomes a fixed contact having a predetermined shape. Molding and mounting of the fixed contacts will be done at the same time. Therefore, the molding process for bending the tip of the fixed contact into a predetermined shape, which was conventionally required, can be omitted.

[Brief explanation of the drawing]

FIGS. 1 and 2 show an embodiment. FIG. 1 is a sectional view of the entire kill switch, and FIG. 2 is an explanatory diagram of the main parts assembled. (Explanation of symbols) 1...Housing, 2...Contact accommodation space, 3...
Base, 4... Shaft, 5... Movable contact, 10.
...First fixed contact, 11...Second fixed contact, 12
...Tapered surface.

Claims (1)

[Claims] A space is formed in the housing, a movable contact is movably accommodated in the space, a tapered surface is formed on the inner surface of the housing in the space, and the tapered surface is inclined in the direction of movement of the movable contact, and a plate is inserted into the space. A method for manufacturing a kill switch, characterized in that a fixed contact is formed by pushing a plate-shaped conductor and bending at least the tip of the plate-shaped conductor along the tapered surface.