JPS6347014Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of a terminal joint of a radio noise prevention electric wire that is wired to an ignition device such as a pin-type ignition coil of an internal combustion engine or a high-voltage terminal for a power distributor.

A wire-wound resistor-containing cord is used for the radio noise prevention wire, which minimizes the drop in spark current and increases the noise prevention effect, and a pin-shaped terminal protruding from the ignition coil body, power distribution device body, etc. is connected to the terminal of this wire. . However, if this connection is not completely electrically conductive, a slight gap may occur in some cases, causing a misfire due to loss of spark energy. For this reason, a structure as shown in FIG. 1 was considered as a connection structure for the terminal portion. That is, one leg b of the U-shaped contact a is inserted between the conductive winding d and the insulation coating e, and the other leg c is caulked along the outer circumferential surface of the insulation coating e. A pin type terminal f is connected between the leg piece b and the insulating cover e. This structure achieves a certain level of radio noise prevention effect, but if the crimping pressure is too strong during manufacturing, the cord will be greatly deformed, making it difficult to connect it to the ignition coil body, power distribution unit body, etc. In addition, the gap g between the leg piece and the insulating coating becomes large, and there is a possibility that the pin type terminal may not be completely connected. In addition, if the caulking pressure is weakened to prevent this, the clamping force between the contact and the cord is loose, and there is a risk that the cord may fall off during use, resulting in poor quality stability and poor production efficiency.

The purpose of this invention is to further improve this structure and obtain a radio noise-proof wire that is completely connected and connected without causing any gaps at the connection part, has stable quality, and has high productivity. This is what I did.

An embodiment of the configuration of this invention shown in the drawings will be described in detail. Reference numeral 1 denotes a cord, in which the outer periphery of a conductive winding 2 made of a wire-wound resistor is covered with an insulating coating 3. Reference numeral 4 denotes a strip-shaped contact made of a conductive material, which is bent into a U-shape to form both leg pieces 5 and 6. Both leg pieces 5 and 6 of this contactor 4 are inserted from the end face of the cord 1 so as to sandwich the conductive winding 2, and then caulked between the outer surface of one leg piece 5 and the inner surface of the insulation coating 3. One pressing rod 7a of the tool 7 is inserted, and the other pressing rod 7b is pressed and caulked by the caulking tool 7 along the outer surface of the insulation coating 3 on the outer periphery of the other leg piece 6, thereby tightening the leg piece 5.
is pressed and compressively deformed together with the conductive winding 2 to be clamped and fixed. In addition, 8 is an ignition coil or a power distribution device main body, 9 is a pin type terminal protruding from the main body 8, 1
0 indicates a rubber cap that seals between the plug cord 1 and the main body 8.

As configured as described above, in order to connect this cord 1 to the ignition coil body or the power distributor 8, a pin type Just insert the terminal 9.

The outer surface of the leg piece 5 of the contactor 4 in the above embodiment may be formed into a concave arcuate cross section as shown in FIG. With this configuration, the pin-type terminal 9 can be inserted more easily, and the leg piece 5 has increased rigidity so that it can be more firmly fixed to the conductive winding.

In this invention, as mentioned above, the conductive winding is clamped between both legs of the contact from both sides, so that only one leg deforms and is firmly fixed to the conductive winding. The other leg prevents the insulation coating and the entire cord from deforming.
Connection with a connecting body such as an ignition coil can be smoothly performed. Moreover, the pin-type terminal provides rigidity to the conductive winding by the two legs, so that it can be completely connected without creating any gaps in the connecting portion, thereby preventing misfires. In addition, even when caulking both legs, only one leg deforms to sandwich the conductive winding, so even if there are slight variations in the pressing and caulking pressure, the product can be firmly fixed and the quality can always be maintained at a constant level. It has various excellent effects such as being able to improve productivity and improving productivity.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the prior art, Fig. 2 is a longitudinal sectional view of this device when assembled, Fig. 3 is a longitudinal sectional view of the same after assembly, and Fig. 4 is a perspective view of another embodiment. . 1... Cord, 2... Conductive winding, 3... Insulating coating, 4... Contact, 5, 6... Leg pieces.

Claims (1)

[Scope of utility model registration request] The conductive winding at the end of the wire-wound resistor plug cord is sandwiched between the legs of the contact, which is bent into a U-shape. This is inserted into the insulation coating and crimped, and the conductive winding is sandwiched between the legs. The terminal part of the radio noise prevention wire that is attached.