JPS58285Y2 - ignition coil device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a structural improvement of an ignition coil device.

First, a conventional device of this kind will be explained with reference to FIG.

In Figure 1, 1 is a rod-shaped core, 2 is a cylindrical secondary bobbin fixed to the outer periphery of this core, 3 is a secondary coil wound around this bobbin, and 4 is the outer periphery of this secondary coil. A resin (hereinafter referred to as resin) is impregnated in the minute gaps provided in the resin.

5 is a primary dobbin fixed to the outer periphery of this resin, 6 is a primary coil wound around this bobbin, 7 is a side plate that locks the left end of the core 1 and is made of a non-magnetic insulator, and the left end a protruding portion 7a protruding from the cylindrical portion 7 into which the core 1 can be inserted;
b and the above secondary bobbin 2. secondary coil 3, resin 4.1
It consists of a collar portion 7C that comes into contact with each left end surface of the next bobbin 5.

8 is a pin fixed to the right end surface of the core 1, 9 is an outer peripheral molding material, and the core 1, each bobbin 2, 5, each coil 3
, 6, is formed to cover the outer periphery of the side plate 7.

Reference numeral 10 denotes a fixing bolt fixed to this outer peripheral mold material 9.

When manufacturing the conventional device configured as described above, first, the secondary coil 3 is wound around the secondary side X-bin 2, and then the primary side The bobbin 5 is inserted, and the primary coil 6 is wound around the primary bobbin 5.

After that, the core 1 is inserted into the secondary bobbin 2 and fixed.

After that, these integrated core 1, bobbin 2, 5,
The coils 3 and 6 are impregnated with resin, and the outer periphery of the coils 3 and 6 and the minute gap 4 between the secondary coil 3 and the primary X pin 5 are each impregnated with the resin 4.

Thereafter, the left end of the core 1 is inserted and locked into the cylindrical part Ib of the side plate T, and the right end of the core 1 is locked with the formwork (not shown) K of the mold via the pin 8. So, the above core 1
The bibbins 2, 5 and the coils 3, 6 are positioned within the formwork, and the mounting bolts 10 are similarly locked in the formwork.

Finally, the mold was impregnated with resin and then externally molded.

By the way, in this conventional device, the primary bobbin 5.
There were many parts such as the secondary bobbin 2 and the side plate 7, and the assembly required a lot of man-hours, resulting in extremely poor workability.

Furthermore, a minute gap 4 is formed between the secondary coil 3 and the primary bobbin 5 due to assembly reasons, and therefore, resin is injected into the minute gap 4 during resin impregnation. but,
The amount of resin 4 injected is extremely small.

Therefore, since the thickness of the primary bobbin 5 is thin and the amount of resin 4 injected into the minute gap 5 is small, the withstand voltage of the secondary coil 3 is poor (and current leakage occurs when high voltage is generated).

This invention provides an excellent ignition coil/' device that eliminates the above-mentioned problems.

An embodiment of this invention shown in FIG. 2 will be described below.

In FIG. 2, reference numeral 11 denotes a side plate that locks the left end of the core 1, which is made of a non-magnetic insulator, and includes a protrusion 11a projecting from the left end and a locking portion 11b into which the core 1 is inserted and locked. , which can accommodate the core 12 secondary bobbin 22 secondary coil 3;
It consists of a cylindrical bobbin portion 11c that can form a predetermined gap between the outer periphery and both side surfaces of the secondary coil 3, and around which the primary coil 6 is wound.

Further, a flange portion is formed on the bobbin portion 11c.

Reference numeral 12 denotes a resin filled in the gap between the bobbin portion 11c of the side plate 11 and the secondary coil 3.

In the embodiment device configured as described above, first,
The secondary coil 3 is wound around the secondary bobbin 2, and the core 1 is inserted into the inner periphery thereof, and the core 1, bobbin 2, and coil 3 are housed in the side plate 11, and the left end of the core 1 is attached to the locking part 11b. Insert and lock.

Thereafter, the right ends of the core 1 and the side plate 11 are positioned using a formwork for impregnation.

In this state, the outer circumference and both sides of the secondary coil 3 and the side plate 1
A predetermined gap is formed between the first bobbin portion 11C and the first bobbin portion 11C.

When the predetermined gap is impregnated with resin in this state, the resin 12 is completely impregnated within the substantially sealed predetermined gap, and the outer periphery and both sides of the secondary coil 3 are sufficiently insulated.

Thereafter, the primary coil 6 is wound around the outer periphery of the bobbin portion 11c of the side plate 11.

Further, the winding operation of the primary coil 6 may be performed with only the side plate 11 before being impregnated with resin.

Then, both ends of the core 10 are locked with the formwork of the mold,
Position the integrated core 1, each coil 3, 6, bobbin 2, side plate 11 within the formwork, and similarly tighten the mounting bolts 10.
moored with formwork.

Finally, the mold is impregnated with resin and the outer periphery is molded.

Therefore, in this embodiment, the side plate 11 is provided with a VC bobbin portion 11c, and the primary coil 6 is wound around this bobbin portion 11e with a 54C winding, so that the conventional primary bobbin 5 is unnecessary. Therefore, the number of parts can be reduced and the number of manufacturing steps can be reduced.

Further, since the secondary coil 3 is housed in the bobbin portion 11C of the side plate 11, and the gap between them is injected with resin to be impregnated, the resin 12 does not leak, and therefore, unlike the conventional method, the secondary coil 3 is impregnated with resin. , the resin impregnation properties are better than those that are immersed in a resin tank and then pulled up and dried.

Along with this, the outer periphery and both sides of the secondary coil 3 are covered with resin 1.
Since the second side plate 11 is covered, the insulation properties of the secondary coil 3 are further improved.

As mentioned above, this idea has a side plate made of non-magnetic insulator.
A locking part that locks one end of the core, and a part that accommodates the core, bobbin, and secondary coil, and a predetermined gap is formed between the inner periphery of the part and the outer periphery of the secondary coil, and the primary coil is wound around the outer periphery. Since a cylindrical bobbin part is provided, the primary bobbin as in the conventional case can be omitted, the number of parts can be reduced, and the number of manufacturing steps can be reduced, improving work efficiency. Since the predetermined gap between the inner periphery of the bobbin part of the side plate and the secondary coil is sufficiently impregnated with resin, the withstand voltage of the secondary coil is improved and problems such as current leakage when high voltage is generated can be prevented. be.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional device, and FIG. 2 is a sectional view showing an embodiment of this invention. In the figure, 1 is the core, 2 is the secondary bobbin, 3 is the secondary coil,
6 is the primary coil, 9 is the exterior mold, 11 is the side plate, 11
a is a protruding part, llb is a locking part, 11c is a bobbin part, 12
is resin. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A core, a cylindrical secondary bobbin attached to the outer periphery of the core, a secondary coil wound around the bobbin, a locking part that locks one end of the core, the core, the bobbin, and the secondary coil. A side plate made of a non-magnetic insulator, which is capable of accommodating a cylindrical bobbin portion that forms a predetermined gap between the inner periphery and the outer periphery of the secondary coil, and has a cylindrical bobbin portion around which the primary coil is wound. An ignition coil device comprising: a resin that fills the predetermined gap and impregnates the secondary coil; and an outer peripheral molding material that covers the outer peripheral portions of the side plate, the primary coil, and the core.