JP2698966B2 - Plug for high tension cord - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug for a high tension cord, and more particularly to a plug for a high tension cord used in an ignition system of an automobile engine.

[0002]

2. Description of the Related Art In an ignition system of an automobile engine, a so-called high tension cord is used as a high-voltage cable for interconnecting an ignition coil, a distributor, a spark plug, and the like. And a plug having projections. As such a plug, for example, a plug for connecting to a spark plug has a concave or cup-shaped base that can be fitted to the upper convex conductor of the spark plug, or a distributor or an ignition plug. Some have a convex or rod-shaped conductor (projection) that can be inserted into a concave socket (boot) of the coil.

FIG. 3 is a partial sectional view showing an example of such a conventional plug. In this example, high tension code 1
The rod-shaped member 34 connected to the inner conductor 20 of No. 8 is used as the protrusion. The member 16 in FIG. 3 is an insulating plug cap.

FIG. 4 is a partial cross-sectional view showing another conventional example, which differs from that of FIG. 3 in that a conductor 36 used as a projection is curved at a right angle. It is the same as FIG.

[0005]

In such a conventional plug for a high tension cord, a rod-shaped conductor (projection) 34,
Reference numeral 36 is connected and fixed to the inner conductor 20 of the high tension cord 18 by caulking or the like. Therefore, the rod-shaped conductors 34 and 36 do not easily come off. A plug having such a configuration is suitable for the concave socket described above, but is not suitable for a convex conductor such as a spark plug. Therefore, for example, the plug is attached to both ends of a high tension cord 18 for connecting between a distributor and a spark plug. As a plug to be used, one had to have a rod-shaped conductor (projection), and the other had to have a concave base. Further, if the rod-shaped conductor is repeatedly attached and detached, the rod-shaped conductor may be worn or damaged, so that the entire high tension cord 18 may have to be replaced. Therefore, an object of the present invention is to provide a plug for a high tension cord which can be adapted to both a concave socket and a convex conductor and can easily replace a bar-shaped projection.

[0006]

In order to achieve the above object, according to the present invention, a bar-shaped projection of a plug for a high tension cord extends radially from an end thereof and extends substantially parallel to an axial direction. One having a blade-like member having a portion is detachable from the concave base.

That is, according to the present invention, a bar-shaped conductor which forms a bar-shaped projection which can be fitted into a concave portion to be connected, and a concave shape which is connected to a center conductor of a high tension cord and which detachably holds one end of the bar-shaped conductor. A base, a plug cap made of an insulator covering a part of the concave base and the rod-shaped conductor when the rod-shaped conductor is mounted on the concave base, and the other end of the rod-shaped conductor. A plug for a high tension cord having a wing-like member having a portion extending radially and a portion extending substantially parallel to the axial direction is provided.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional view of a preferred embodiment of the present invention. FIG. 1 shows a state in which the rod-shaped projection 14 has been detached from the plug body 12. FIG. 2 is a partially enlarged sectional view of FIG. The coating of the tip of the high tension cord 18 is removed so that the inner conductor 20 is exposed. The inner conductor 20 has a base 22 which is a tubular conductor.
Is connected. The base 22 is curved at a right angle,
Although the entire high tension cord plug has a shape bent at 90 °, the present invention is not limited to this shape. A protrusion 24 protruding inward in the radial direction is provided on the inner periphery near the tip 22A of the base 22. The insulating plug cap 16 is provided with the entire base 22 and the rod-shaped projection 14.
Is provided so as to cover a part thereof when attached.

The rod-shaped projection 14 has a rod-shaped conductor 26 and a blade-like member 28 attached to the tip thereof. Further, on the outer periphery near the other end 26A of the rod-shaped conductor 26,
An annular recess 32 is provided. 30 is a blade-like member 28
Are attached to the rod-shaped conductor 26. The rod-shaped conductor 26 is made of, for example, brass, and the shape in the vicinity of the concave portion 32 is the same as the upper end of a commonly used spark plug for an automobile engine. Further, the shape near the convex portion 24 provided near the distal end portion 22A of the internal conductor 20 is designed so as to be connected to the concave portion 32 with an appropriate pressure.

The blade-like member 28 is preferably made of an elastic material such as a thin steel plate or the like. The blade-like member 28 is formed by bending four radiating portions of a cross-shaped thin plate, for example, as shown in FIG. The shape is as shown. Therefore, when attached to the rod-shaped conductor 26, the wing-like member 28 has a portion 28A extending radially from the end thereof and a portion 28B extending substantially parallel to the axial direction. The portion 28B extending substantially parallel to the axial direction is provided with a projection 28C protruding outward in the radial direction. The diameter of the lower portion 26B of the bar conductor 26 is smaller than the diameter of the bar members 34, 36 of the conventional plug of FIG. 3 or FIG.

FIG. 2 is a cross-sectional view assuming that the tip of the rod-shaped projection 14 is inserted into a concave conductor (boot portion), for example, a terminal of an ignition coil.
A portion shown by a dashed line in the drawing shows the inner wall of the concave conductor portion, and the blade-like member in a state where a portion 28B extending substantially parallel to the axial direction of the blade-like member 28 contacts the rod-like member 26. 28 is a line indicating the maximum diameter D. That is, in the illustrated embodiment, the protrusion 28C provided on the wing-like member 28 determines the maximum diameter D. Therefore, the distance between the outer sides of the left and right protrusions 28C in the figure is the maximum diameter D.
Is equivalent to It is preferable that the projections 28C be displaced from each other in the axial direction, as shown in FIG. 2, so that they can be easily inserted into the target concave conductor portion and contribute to stability after mounting. To prevent rattling.

The plug for a high tension cord of the present invention having the above structure can be used as follows. Now, it is assumed that the high tension cord plug of the present invention is attached to both ends of the high tension cord. Bar-shaped projection 1
4 can be pulled out from the plug body 12, so that the rod-shaped projection 14 is detached in advance on the side of the plug to be connected to the ignition plug, while on the other side of the plug to be connected to the distributor, It is used in a state where the bar-shaped projection 14 is mounted. Furthermore, in the case of connection between the distributor and the ignition coil, the plugs at both ends are used with the rod-shaped projections 14 mounted.

[0013]

As described above, the plug for a high tension cord according to the present invention is a rod-shaped projection which can be fitted into a concave portion to be connected, a portion extending radially from an end thereof,
The one having a wing-shaped member having a portion extending substantially parallel to the axial direction is detachable, so that when the connection target has a convex part like a spark plug, the rod-shaped projection can be detached and used. When the bar-shaped projection is worn or damaged, it can be easily replaced with another one. Therefore, the high tension cords using the high tension cord plugs at both ends are of the same standard and can meet all needs, and can be used semi-permanently by replacing only the end bar-shaped projections. Furthermore, some foreign-made ignition coils have a terminal shape that is not a domestic boot shape, but instead has a convex shape similar to the head of a spark plug. The high tension cord plug of the present invention can also be applied.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a preferred embodiment of a plug for a high tension cord according to the present invention.

FIG. 2 is a partially enlarged sectional view of a part of FIG.

FIG. 3 is a cross-sectional view showing an example of a conventional high tension cord plug.

FIG. 4 is a cross-sectional view showing another example of a conventional high tension cord plug.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Plug main body 14 Bar-shaped protrusion 16 Plug cap 18 High tension cord 20 Inner conductor 22 Base 22A Tip 24 Convex 26 Bar-shaped conductor 26A End 26B Lower part 28 Blade-like member 28A Radially extending part 28B Extends in the axial direction Part 28C Projection 30 Screw 32 Recess D Maximum diameter

Claims (2)

(57) [Claims] 1. A bar-shaped conductor that forms a bar-shaped protrusion that can be fitted into a concave portion to be connected; a concave base that is connected to a center conductor of a high tension cord and that detachably holds one end of the bar-shaped conductor; When the rod-shaped conductor is mounted on the concave base, a plug cap made of an insulator covering a part of the concave base and the rod-shaped conductor, radially extending from the other end of the rod-shaped conductor. A plug for a high tension cord, comprising: a blade-like member having a portion that extends and a portion that extends substantially parallel to the axial direction. 2. The maximum diameter of the wing-shaped member when a portion of the wing-shaped member extending substantially parallel to the axial direction abuts on the rod-shaped member has an inner diameter of a concave conductor portion of a device to be connected. 2. The plug for a high tension cord according to claim 1, wherein the plug is substantially the same as the plug.