KR20030071212A - An ignition cable assembly having a one body style, and a method of manufacturing that - Google Patents

Abstract

PURPOSE: An integrated ignition cable assembly and a manufacturing method thereof are provided to enhance quality and productivity by integrally forming a distributor boot and an ignition plug boot at both sides of an ignition cable. CONSTITUTION: An ignition plug(25) is integrally formed on an ignition plug connecting terminal(20) and the front end portion of an ignition cable at the side connected with the ignition plug connecting terminal. A distributor boot(35) is integrally formed on a distributor connecting terminal(30) and the front end portion of the ignition cable at the side connected with the distributor connecting terminal. The ignition cable, the ignition plug connecting terminal and the distributor connecting terminal are firmly formed by the ignition plug boot and the distributor boot.

Description

An ignition cable assembly having a one body style, and a method of manufacturing that}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spark plug assembly for connecting a spark plug and a distributor of an automobile, and a method for manufacturing the same. In particular, a distributor boot and a spark plug boot are integrally formed at both ends of an ignition cable, thereby greatly improving quality and manufacturing efficiency. A cable assembly and a method of manufacturing the same.

The spark plug installed in the combustion chamber of the vehicle must be supplied with a high pressure current, and the high pressure current supplied to the spark plug of the combustion chamber of each cylinder is distributed and provided by the distributor.

The high voltage electricity supplied to the distributor is boosted in the ignition coil and supplied.

In such a vehicle ignition system, an ignition cable connecting the ignition plug and the distributor is used, and an end of the ignition cable is provided with an ignition plug connection terminal for connection with the ignition plug, and the other side of the ignition cable. At the end, a distributor connection terminal is provided for connection with the distributor high voltage terminal.

In addition, the spark plug boots are fastened to one end of the ignition cable to surround the spark plug connection terminal, and the other end of the spark cable is fastened to the distributor boot to surround the distributor connection terminal.

The spark plug boots are made of a thick and durable material because the connection between the spark cable and the spark plug must be protected in a harsh environment such as high voltage and high temperature, and synthetic rubber is generally used.

The spark plug connection terminal which is fastened to the end portion connected to the spark plug of the ignition cable is welded or crimped to be in an energized state with the ignition cable.

The outer circumference of the spark plug connection terminal is to fasten the separate spark plug boots as described above.

However, such spark plug boots are fastened by hand. Therefore, the fastening operation is very inconvenient, there is a problem that it is difficult to quantify (standardization) of each assembly because it is not fastened in the correct position.

This may lead to a failure in fastening when the spark plug and the tightening, or to cause problems such as degradation of durability or detachment of the spark plug boots.

After the spark plug boots are fitted, adhesives are applied to the inner ends of the spark plug boots (where the spark plug boots and the outer surface of the spark cable come into contact).

Therefore, each of the spark plug boots must be forcedly fitted and glue applied to each other in order to complete the fastening. Even if the fastening is completed, the spark plug boots are separated from the adhesive parts, which causes problems. It is.

The distributor boot which is the other end of the ignition cable also has the same problem as that of the ignition plug boot.

Therefore, the conventional ignition cable assembly in which the spark plug boots and the distributor boots are assembled in a manner as described above has problems in manufacturing efficiency, durability, quality, and airtightness.

The present invention has been made to solve the problems of the conventional ignition cable assembly as described above, by integrally configuring the ignition plug boots and distributor boots to the ignition cable through injection molding, it is possible to greatly improve the quality and workability The present invention provides an ignition cable assembly and a method of manufacturing the same.

This object can be achieved by the present invention of a structure integrally formed by injection molding, it will be described in detail with reference to the accompanying drawings.

Figure 1 is a longitudinal cross-sectional view showing the overall configuration of the present invention

Figure 2 is a longitudinal cross-sectional view showing another embodiment of the present invention

Figure 3 is a view showing the capped state used in the manufacturing process of the present invention

4 shows another embodiment of FIG.

Figure 5 shows a schematic main part of the injection molding machine used in the manufacture of the present invention

<Description of the reference numerals for the main parts of the drawings>

10: ignition cable 11: core wire

20,20`: Spark plug connection terminal 22,32: Cap for inserting space

25,25`: Spark Plug Boots 30: Distributor Connection Terminal

35: distributor boot 40: mold

1 is a view showing the overall configuration of the present invention.

As shown in the figure, the present invention connects the distributor and the spark plug, the core wire 11, which is a conductor, is built in one end, the distributor connection terminal 30 is connected to enable the electricity supply and the other end of the spark plug connection terminal ( 20. An ignition cable assembly comprising an ignition cable 10, a distributor boot 35, and an ignition plug boot 25, each of which is connected to a power source 20;

The spark plug boot 25 is characterized in that the spark plug connecting terminal 20 and the spark plug connecting terminal is formed integrally molded by injection molding on the ignition cable leading end side.

Of course, the distributor boot 35 can also be configured by integrally molding by injection molding on the ignition cable tip of the distributor connection terminal 30 and the distributor connection terminal.

When configured in this way, the ignition cable 10, the spark plug connection terminal 20 and the distributor connection terminal 30 are firmly integrally molded by injection molding by the spark plug boot 25 and the distributor boot 20. It will be formed.

In particular, such a spark plug boot is integrally formed in two places of the spark plug connection terminal and the ignition cable, so that the fastening force can be further improved, and the distributor boot is also integrally formed in the two places of the distributor connection terminal and the ignition cable. This will be even better.

In addition, the present invention eliminates the need for a separate spark plug boot or distributor boot fastening operation, as well as excellent airtightness, durability and quality.

FIG. 2 shows another embodiment of the present invention, in which the shape of the spark plug connecting terminal 20 'and the spark plug boots have a bent shape having a bent portion. The detailed description is omitted.

5 is a view schematically showing a structure of a molding die of an injection molding machine for manufacturing an integrated ignition cable assembly according to the present invention, and FIG. 3 shows a state where a cap is fitted during the manufacturing process of the integrated ignition cable assembly according to the present invention. Drawing.

As shown in the drawings, the manufacturing method according to the present invention,

A connection terminal installation step of crimpingly connecting the distributor connection terminal 30 and the spark plug connection terminal 20 to both ends of the ignition cable 10;

Forming insertion spaces 27 and 37 into the spark plug connecting terminal 20 and the distributor connecting terminal 30 through which the spark plug and the distributor high voltage terminal can be inserted into the outer circumferential surfaces of the spark plug connecting terminal and the distributor connecting terminal; Cap insertion step of inserting the cap for forming the insertion space (22,32),

The ignition cable 10 is slightly inserted into the molding mold 40 of the injection molding machine in which the ignition plug connection terminal part and the distributor connection terminal part of the ignition cable inserted with the cap conform to the shapes of the spark plug boots and the distributor boot. Mounting step in the molding machine to be mounted in a state that,

A molding step of forming the mold after closing the mold 40 and injecting insulating material;

It comprises a withdrawal step of withdrawing the molding from the injection molding machine.

Of course, after the withdrawal step may further comprise the step of separating the insertion space forming caps (22, 32) from the molding.

The caps 22 and 32 are preferably made of a material having a higher melting point than the insulating material injected into the mold 40, and is provided with an elastic force so that the cap 22 and 32 can be easily fitted to the outer circumferential surfaces of the spark plug connection terminal and the distributor connection terminal. It is desirable to be able to.

In addition, it is preferable to form the release protrusions 23 and 33 on the front end surfaces of the caps 22 and 32 to facilitate the separation from the molding.

As the insulating material injected into the mold, the use of silicon is very effective not only in mechanical performance but also in airtightness and insulation rate.

In particular, since silicone does not generate environmental hormones, it would be very beneficial in terms of pollution prevention.

The molding mold 40 of the injection molding machine is formed with a space for forming a spark plug boots 27 and a shape for the distributor boot 37 corresponding to the shape of the distributor boot, the shape of the spark plug boots, once More preferably, the injection plug process and the spark plug boot and the distributor boot can be molded integrally with the ignition cable.

Of course, the distributor boot, which is relatively easy to fasten during the process, may use a general assembly fastening method instead of injection molding.

Figure 4 is a view showing a capped state used in the manufacturing process of the integrated ignition cable assembly (see Figure 2) according to another embodiment of the present invention. This embodiment is also the same as the above example and its basic configuration and effects, so the detailed description thereof will be omitted.

As described above, since the spark plug boots and the distributor boots are integrally formed on the ignition cable through injection molding, the airtightness and durability are very excellent, and the operation time is very easily performed by automation without a separate assembly process. This shortens the production cost.

Claims (8)

Connect the distributor and the spark plug, the conductor core wire is built in, and the distributor connection terminal is connected to the power supply at one end, and the other end is connected to the ignition cable, distributor boots and spark plug boots An ignition cable assembly constructed; The spark plug boot is an integrated ignition cable assembly, characterized in that the spark plug connecting terminal and the spark plug connecting terminal is formed integrally molded by injection molding on the ignition cable leading end side. The method of claim 1; The distributor boot is an integrated ignition cable assembly, characterized in that formed integrally by injection molding in the ignition cable front end of the distributor connection terminal and the distributor connection terminal side. The method of claim 1; The spark plug boots are integrated ignition cable assembly, characterized in that molded in silicon. The method of claim 2; The spark plug boots are integrated ignition cable assembly, characterized in that molded in silicon. The ignition cable assembly of any one of claims 1 to 4, A connection terminal installation step of crimpingly connecting the distributor connection terminal and the spark plug connection terminal to both ends of the ignition cable; A cap insertion step of inserting an insertion space forming cap to form an insertion space into which the spark plug can be inserted into an outer circumferential surface of the spark plug connection terminal on the spark plug connection terminal; A mounting step in the molding machine for mounting the spark plug connection terminal portion of the ignition cable into which the cap is inserted, with the ignition cable being slightly inserted into the molding mold of the injection molding machine forming a shape corresponding to the shape of the spark plug boot; A molding step of molding after closing the mold and injecting an insulating material; Method of producing an integrated ignition cable assembly characterized in that it comprises a withdrawal step of withdrawing the molding from the injection molding machine. The ignition cable assembly of any one of claims 1 to 4, A connection terminal installation step of crimpingly connecting the distributor connection terminal and the spark plug connection terminal to both ends of the ignition cable; A cap insertion step of inserting a cap for inserting space forming to form an insertion space into which the spark plug and the distributor high voltage terminal can be inserted into the outer circumferential surface of the spark plug connection terminal and the distributor connection terminal to the outer circumferential surface of the spark plug connection terminal and the distributor connection terminal. Wow, The ignition plug connection terminal portion and the distributor connection terminal portion of the ignition cable with the cap inserted are molded in such a state that the ignition cable is slightly inserted into the molding mold of the injection molding machine forming a shape corresponding to the shape of the ignition plug boots and the distributor boots. The onboard phase A molding step of molding after closing the mold and injecting an insulating material; Method of producing an integrated ignition cable assembly characterized in that it comprises a withdrawal step of withdrawing the molding from the injection molding machine. The method of claim 6; The molding mold of the injection molding machine has a molding space for the spark plug boots corresponding to the shape of the spark plug boots, and a molding space for the distributor boots corresponding to the shape of the distributor boot is formed, and the spark plug boots and the distributor in one injection molding process. Method of manufacturing an integrated ignition cable assembly, characterized in that the boot can be molded integrally with the ignition cable. The method of claim 6; Method of manufacturing an integrated ignition cable assembly, characterized in that the release protrusions (23, 33) is formed on the front end surface of the cap for forming the insertion space to facilitate the separation.