JPS6246254Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has a structure in which a groove is provided in the case so that when inserting the high voltage cord into the hole in the case, the end face of the high voltage cord after insertion can be inserted securely to the bottom of the hole in the case. Regarding the ignition coil with.

When inserting a high-voltage cord, the coated part of the high-voltage cord is grabbed, so during insertion, the coated part of the high-voltage cord goes deeper than the core wire of the high-voltage cord, and the tip of the high-voltage cord becomes cone-shaped. After insertion, the high-voltage cord covering portion moves back against the insertion direction, and the tip of the high-voltage cord becomes flat.

Therefore, conventionally, the bottom of the hole in the case was flat, so the high voltage cord core wire could not be inserted all the way to the bottom of the hole in the case, resulting in insufficient conduction between the secondary terminal and the high voltage cord core wire. It was hot.

In order to solve the above problem, the present invention provides a groove on the case side to compensate for the temporary movement of the high voltage cord sheathing part during insertion of the high voltage cord, so that when the high voltage cord core wire reaches the bottom of the hole in the case. If you release the high voltage cord covering part, the high voltage cord will be fixed with the tip fully inserted to the bottom of the hole in the case.
The purpose is to have sufficient continuity with the secondary terminal.

The present invention will be described below with reference to embodiments shown in the drawings. 1 to 3, a case 1 made of synthetic resin houses primary and secondary coils (not shown) wound around a core 6, and is sealed with a casting resin 7. The case 1 has a cylindrical hole 1a at the end, and a needle-shaped secondary terminal 3 is attached to the bottom of the hole 1a so as to protrude into the hole 1a.
Further, a ring-shaped groove 2 is provided in the bottom portion along the circumference of the terminal 3. Then, insert the high voltage cord 4 into the cylindrical hole 1 of the case 1 in the direction of the arrow in FIG.
a, and conductivity is established between the core wire 4b of the high voltage cord 4 and the terminal 3. When inserting the high-voltage cord 4 into the cylindrical hole 1a of the case 1, the coated portion 4a of the high-voltage cord 4 is grabbed, so during insertion, the high-voltage cord coated portion 4a is pushed deeper than the high-voltage cord core wire 4b. and high voltage cord tip 4c as shown in Figure 3.
It becomes bowl-shaped. Therefore, the high voltage cord core wire 4b
The high-voltage cord covering part 4 goes further back than the
a can escape into the groove 2 of the case 1. After inserting the high voltage cord 4, by releasing the high voltage cord covered portion 4a, the high voltage cord covered portion 4a moves back against the insertion direction due to its elastic force, as shown in FIG. is flat, but due to the presence of the groove 2, the tip of the high voltage cord 4 is fixed to the secondary terminal 3 in a state where it is fully inserted to the bottom of the hole 1a of the case 1.

In the above-described embodiment, the groove 2 has a substantially semicircular cross-sectional shape, but it may have a substantially trapezoidal cross-sectional shape as shown in FIG.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing one embodiment of the coil of the present invention, Fig. 2 is an enlarged longitudinal sectional view of the main part of the coil shown in Fig. 1, and Fig. 3 shows the state when the high voltage cord is inserted in Fig. 2. FIG. 4 is an enlarged vertical cross-sectional view of the main part of another embodiment of the coil of the present invention before the high-voltage cord is inserted. 1...Case, 1a...Cylindrical hole, 2...Groove,
3...Secondary terminal, 4...High voltage cord, 4b
...High voltage cord core wire, 4a...High voltage cord covering part.

Claims (1)

[Scope of utility model registration request] A secondary terminal is fixed to the bottom of a cylindrical hole in the case, a high voltage cord is inserted into the hole, and the core wire of this high voltage cord is connected to the terminal.In the ignition coil, the hole is inserted along the circumference of the terminal. An ignition coil with a ring-shaped groove formed at the bottom.