JPS595184Y2 - Ignition circuit unit holding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a holding device for attaching an ignition circuit unit to a part of an ignition coil in a non-contact type ignition device for an internal combustion engine.

Non-contact ignition devices for internal combustion engines require an ignition circuit to discharge sparks from the ignition plug at predetermined timings, and in recent years compact and lightweight units with this ignition circuit have been seen.

This ignition circuit unit is not mechanically constrained by the ignition system, so it can be installed anywhere, but it is necessary to connect the ignition circuit unit and the winding, and the lead wire is The shorter the better.

In view of the above, the present invention has been developed to allow the ignition circuit unit to be attached to the ignition coil extremely easily and reliably, and is compact as an ignition device. Examples will be described according to the drawings.

First, 1 is an ignition coil, which has a substantially U-shaped laminated core 2.
A coil 3 is attached to the center of the core (partially omitted in the drawing), and a flywheel is located below the laminated core 2 (not shown), which is a so-called exterior type.

The laminated core 2 has a plurality of core plates 4 with slightly thick end plates 5 on both sides, and the winding 3 is a primary winding and a secondary winding in a bobbin case 6 made of synthetic resin. The outer surface is molded with resin.

In the ignition coil 1 having such a configuration, on both ends of the upper part of the side end plate 6a of the bobbin case 6 exposed to the outside, there is a hook whose plane is in the shape of an abbreviation and whose tip faces the direction of the winding 3. The mating protrusions 7 are formed to protrude from each other.

Further, reference numeral 8 shown in FIG. 3 is a belt-shaped holding plate, which has a substantially U-shape, and both ends thereof are connected to the bobbin case side end plate 6.
It is bent into a U-shape so as to horizontally engage with the engagement protrusion 7 of a.

And resin-molded rectangular ignition circuit unit 9
is placed in contact with the end surface of the side end plate 6a of the bobbin case 6,
The band-shaped holding plate 8 is fitted into the unit 9 from the side, and the distal end of the holding plate 8 is engaged with the retaining protrusion 7, so that the unit 9 is tightened and held.

Therefore, it is preferable that the holding plate 8 has appropriate elasticity and excellent tensile strength, and from this point of view, elastic resin or steel plate may be used as the material.

In order to more securely hold this ignition circuit unit 9, a slit-shaped hole 6b is bored in the end face of the side end plate 6a, and a protrusion that fits into the hole 6b is provided on the face of the unit 9 facing the side end plate 6a. 9a may be provided so that it can be fitted during the above-mentioned installation, and furthermore, this hole 6b and the protrusion 9a can serve as both a socket and a plug for connecting the winding 3 and the ignition circuit unit 9. Good (Figure 4)
.

Further, in the embodiment shown in FIG. 5, when the units I to 9 are smaller than the length of the side end plate 6a in the width direction, the engaging protrusion 7 is connected to the side end plate 6a.
This figure shows the case where the protrusion is provided not on the side edge but on the end face.

The present invention has such a structure.

Therefore, the retaining protrusion 7 can be integrally molded with the bobbin case 6 using synthetic resin, making it easy to mold.Moreover, the configuration can be freely configured according to the size of the ignition circuit unit 9, and the retaining plate 8 Since it has a suitable elastic tension, it is possible to firmly hold the ignition circuit unit 9 while tightening it.

Moreover, the ignition circuit unit 9 is hardly affected by heat because wind is sent by the rotation of a finned wall wheel attached to a part of the ignition coil 1.

Therefore, the present invention is a non-contact type ignition device for an internal combustion engine, which has a simple structure and allows the ignition circuit unit I to be installed extremely easily and reliably by using a part of the ignition coil. Moreover, the ignition circuit unit and the ignition coil can be combined into a compact ignition device.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the device according to the present invention, Fig. 2 is a plan view,
FIG. 3 is a perspective view of the holding plate, FIG. 4 is a perspective view of another embodiment, and FIG. 5 is a plan view of another embodiment. Explanation of symbols 1...Ignition coil, 2...
- Laminated iron core, 3... Winding wire, 6... Bobbin case, 6a... Side end plate, 7... Engaging protrusion, 8... ...Retaining plate, 9...Ignition circuit unit.

Claims (1)

[Scope of utility model registration request] In a non-contact type ignition device for an internal combustion engine, an ignition coil 1 has a winding 3 wound around a laminated iron core 2 via a bobbin case 6, and a pair of retaining protrusions 7 are provided on an end plate 6a on the side of the bobbin case 6. An ignition circuit unit holding device comprising a band-shaped holding plate 8 whose both ends engage with the engagement protrusions 7 to tighten and hold the rectangular ignition circuit unit 9.