JPH074334A - Construction of device signal conductor take-out part - Google Patents

Abstract

PURPOSE:To improve productivity while insuring waterproofing by arranging a projecting part on the face perpendicular to the through hole of a grommet passing a signal conductor therein and contacting with a housing at engaging the grommet with the housing, and easily positioning the grommet. CONSTITUTION:In a distributor for internal combustion engine, a coupling, a reluctor, and a distributor rotor are fitted to a shaft integratedly rotatably. A signal detector and a distributor cap are fitted to a housing 2. Further a grommet 8 made of an elastic body such as rubber is engaged with the engaging hole 21 of the housing 2. In this case, on the grommet 8, a projecting part 82 is formed in the direction perpendicular to a through hole 81 passing a signal conductor therein, and on the face cotacting with the housing at engaging with it. Meanwhile, a recessed part 22 to be engaged with the projecting part 82 is formed in the engaging hole 21. By engaging the projecting part 82 with the recessed part 22, the grommet 8 is easily positioned and the waterproof property is insured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a signal line lead-out portion of a device, and relates to a grommet having excellent productivity.

[0002]

2. Description of the Related Art The structure of a conventional signal line extraction section is as follows.
-45090 publication. That is, the insulating grommet is composed of a cylindrical portion that is engaged with the device and a flange portion that is provided at both ends of the cylindrical portion. With this structure, the waterproof grommet, the positioning, and the removal prevention are provided when the device is engaged with the device. .

[0003]

The above-mentioned prior art requires a mold structure that divides in the signal line penetrating direction in order to form a hole through which the signal line penetrates when molding the grommet, and further, the device engagement. Part and the brim part of both ends,
A mold structure is required to divide the signal line in the direction perpendicular to the signal line penetrating direction, and the mold must be divided into four directions in all. Therefore, there are problems in that the mold manufacturing cost of the grommet increases and the productivity decreases.

An object of the present invention is to provide a structure of a signal wire takeout portion of a device which can improve the productivity of grommets without impairing the waterproof property.

[0005]

In order to achieve the above object, the present invention provides a grommet engaging hole on the device side by providing a convex portion at a right angle to the signal line through hole direction on the surface of the grommet that contacts when the device is engaged. Also has a structure in which a concave portion is provided on the grommet contact surface according to the shape of the grommet.

[0006]

According to the present invention, it is possible to form waterproof, positioning, and slip-out preventing projections in the mold dividing direction for forming signal line through holes when forming a grommet.
The grommets can be molded by dividing the mold in the directions, so that it is possible to reduce the grommet mold manufacturing cost and improve the productivity.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention applied to a distributor for an internal combustion engine will be described below with reference to FIGS.

The shaft 1 is rotatably attached to the housing 2, and the shaft 1, the coupling 3, the reluctor 4, and the power distribution rotor 5 are attached to rotate together with the shaft 1. Further, the signal detector 6 and the power distribution cap 7 are fixed to the housing 2. The grommet 8 made of an elastic material such as rubber has a grommet engagement hole 21 in the housing 2.
Is attached to and attached to. The grommet 8 has a convex portion 82 on the surface that comes into contact with the through hole 81 through which the signal wire 9 is passed when the housing 2 is engaged with the through hole 81 at a right angle. or,
The engaging hole 21 of the grommet 8 of the housing 2 is provided with a concave portion 22 so that the convex portion 82 of the grommet 8 is engaged. In the structure of the signal wire extraction portion of this structure, the convex portion 82 of the grommet 8 is engaged with the concave portion 22 provided in the engaging hole 21 of the grommet 8 of the housing 2, and the convex portion 82 of the grommet 8 is compressed to be waterproof. At the same time, since it is engaged with the concave portion 22 on the device side, the grommet 8 is prevented from coming off in the direction of the through hole 81 through which the signal wire 9 is passed, and when the grommet 8 is engaged, the convex portion 82 and the concave portion 22 are formed. Since they are engaged, positioning can be easily performed.

[0009]

According to the present invention, the grommet mold manufacturing cost can be reduced and the productivity can be improved without impairing the waterproof function, the positioning function, and the removal prevention function.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a distributor for an internal combustion engine showing an embodiment of the present invention.

FIG. 2 is a perspective view of a signal line extraction portion of the present invention.

[Explanation of symbols]

2 ... Housing, 6 ... Signal detection part, 8 ... Grommet, 2
1 ... Engagement hole, 22 ... Engagement concave part, 81 ... Through hole, 82 ... Convex part, 9 ... Signal line.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hideki Otsuki 2477 Kashima Yatsu, Takaba, Katsuta-shi, Ibaraki Prefecture 3 Hitachi Automotive Engineering Co., Ltd. (72) Masao Omori 2520 Takaba, Katsuta-shi, Ibaraki Stocks Company Hitachi, Ltd. Automotive Equipment Division

Claims (2)

[Claims] 1. A structure of a device signal wire extracting portion constituted by a grommet fixedly engaged with a notch or a hole provided in the device, a signal wire penetrating the grommet and connecting the inside and outside of the device, A structure of a device signal wire extraction portion, characterized in that a convex portion is provided on a surface connected to a grommet engagement hole provided in a device at a right angle to a penetration direction of a signal line of the grommet to position the grommet. 2. The structure of the equipment signal wire takeout portion according to claim 1, wherein the notch or hole on the equipment side is provided with a recess corresponding to the projection of the grommet.