JPS58187578A - Distributor for ignition of internal-combustion engine - Google Patents

Abstract

PURPOSE:To permit to substitute a housing for the shield of electric wiring by a method wherein the housing, holding the shaft of the distributor, is formed by a synthetic resin having insulating property and a metallic member, formed by an insert forming, is provided in the housing. CONSTITUTION:The housing 1 for the distributor, fixed to the internal-combustion engine, is formed by the synthetic resin having insulating property and the shaft 2 of the distributor is held rotatably bythe housing. A connector 9 is formed integrally with a part of the housing 1 and the terminals 10a, 11a of the electric wirings 10, 11, which are formed by the insert forming, are provided in the housing. When the shaft 2 of the distributor is rotated in synchronized with the revolution of the internal-combustion engine, a cam 4a is rotated through a centrifugal type governer 3 and cuts or breaks a breaker 6 to generate ignition signals. These ignition signals are transmitted from one terminals 10b, 11b to the other terminals 10a, 11a through the electric wirings 10, 11 and, then, are transmitted from the connector 20 to a transforming device located at the outside of the distributor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to (1) an internal combustion engine ignition distributor, and in particular to improvements in both the housing and the electrical wiring thereof.

Conventionally, the housing of an ignition distributor for an internal combustion engine is generally made of aluminum die-casting, and the cables of the electric circuit, such as the ignition signal line and the power line, are coated with electrical insulation material, and the electrical inputs are connected to external equipment. If there is an output, it is fixed to the housing with a rubber grommet or the like.

In the present invention, the housing is molded from a synthetic resin having electrical insulation properties, and when there is an electrical input/output with the outside, the shape of the connector is formed in a part of the housing, and the electrical wiring is carried out using a metal member inside the housing. Insert molding allows the housing to have the mechanical and electrical functions of a connector, and also when connecting two or more internal electrical elements, a metal member that is insert molded within the housing can be used. The electrical function is satisfied, and it is possible to fix both ends using a connector type, and it is possible to fix it only by soldering by manufacturing the shape and dimensions of the metal member accurately (2). target

The present invention will be described below with reference to embodiments shown in the drawings.

In Figures 1 and 12, reference numeral 1 denotes a distributor housing fixed to the internal combustion engine, which is made of a resin material with electrical #IA properties, and allows the distributor shaft 2 driven by the internal combustion engine to freely rotate. Let me keep it. 3 is a centrifugal governor attached to the distributor shaft 2, and 4 is a cam cylinder rotatably attached to the distributor shaft 2. The centrifugal governor 3 advances the distributor shaft 2 by a position corresponding to the engine speed. That's how it is. A breaker plate 5 is rotatably attached to the housing 1 and is driven by a vacuum advance device (not shown) to a position corresponding to the negative pressure in the intake pipe of the internal combustion engine. 6 is a breaker fixed on the breaker plate 5 and serving as an interrupting means; a cam 4a provided on the cam cylinder 4;
The cam 4a opens and closes at every predetermined angle of rotation as the cam 4a rotates. Reference numeral 7 denotes an insulated rotor that is removably fitted and fixed to the tip of the cam cylinder 4, and its upper surface is coated with a conductor such as iron (
3) Another power distribution core 8 is embedded and fixed. Reference numeral 9 denotes a connector part integrally molded into a part of the housing 1, and plate-shaped electrical connection wires 10, which are insert-molded in the housing 1.
One end 10a, lla of 11 is included. The connector portion 9 is provided at a position where it does not get in the way when the housing 1 is attached to an internal combustion engine (not shown). A hole 9a is provided in a part of the peripheral wall of the connector portion 9 for fitting with a mating connector 20, and the engaging claw 20a of the mating connector 20 is fitted with a spring force. In addition to electrical connection 10.11,
110b and llb are connected to the breaker 6. Further, 12 is a cap made of an insulator fixed to the open end of the housing 1 with a screw 13, 14 is a center electrode that receives the ignition voltage, and is formed as an insert in the cap 12.
It is electrically connected to the power distribution core 8 via a spring 15 and a carbon electrode 16. Reference numeral 17 denotes a high-voltage terminal fitting that is insert-molded in the cap 12, and is connected to an ignition plug provided in the internal combustion engine via a cord (not shown).

In the configuration described above, the distributor shaft 2 (4) rotates in synchronization with the rotation of the internal combustion engine, and as the distributor shaft 2 rotates, the cam 4 is rotated via the centrifugal governor 3.
a rotates, and as the cam 4a rotates, the breaker 6 is turned on and off and an ignition signal is generated.

This ignition signal is transmitted from one end 10b, llb to the electrical wire to,
The signal is transmitted to the other ends 10a and 10b via tt, and is transmitted from the fitted connector 20 to an external transformer. By insert-molding the electrical wiring inside the electrically insulating resin housing 1 in this way, the conventional rubber grommet used to prevent water from seeping into the interior becomes completely unnecessary. Further, in the connector shape of one example of the housing, a small window 9a is formed because the housing material is made of polyphenylene sulfide, which is highly rigid among resin materials, and cannot be imparted with spring properties. The mating connector 20 is fixed by the engagement claw 20a caught in the small window 9a by springback.

According to the present invention, the shield of the electrical wiring is replaced by the housing, which has the excellent effect of reducing the number of parts and reducing the number of man-hours required for assembly.

(5) The present invention is also applicable to the input connector of the battery power source in other internal combustion engine ignition devices, that is, devices that incorporate a non-contact pickup, an ignition coil, and an igniter.

In addition, when electrically connecting two or more electrical devices inside the housing, such as a magnetic detection element and an igniter, it is possible to It can also be connected mechanically.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the distributor of the present invention, and FIG. 2 is a vertical cross-sectional view showing the configuration of a main part of the distributor shown in FIG. 1 with an external connector connected. 1...Housing, 2...Distributor shaft,
9...Connector part, 9a...Small window, 10.11...
・Electrical connection wire as a metal member. Representative Patent Attorney Takashi Okabe (6)

Claims (1)

[Claims] (11) An internal combustion engine ignition distributor in which a housing holding a distributor shaft is molded of electrically insulating synthetic resin, and a metal member for electrical wiring is insert-molded in the housing. (2) The distributor according to claim 1, wherein a part of the housing around the metal member is formed in a connector shape. (3) The connector shape is an engaging claw of a mating connector. 2. The distributor according to claim 2, wherein the distributor has a shape having a small window for receiving. (4) Claim 11, wherein the metal member connects two or more electrical devices inside the housing. Distributor mentioned in section.