JPH0341094Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to an engine ignition system that integrates a power generation coil, ignition control electronic components, ignition coil, etc. into a unit, and is particularly easy to manufacture and can be provided at low cost. This is a characteristic feature.

[Conventional technology]

An electric ignition method is used to ignite fuel in an engine, and today an electromagnetically picked up control signal is used to obtain ignition energy by intermittent primary current in the ignition coil of an ignition device.

In order to pick up control signals, such an ignition control device is provided with a power generation coil that induces a voltage through magnetic changes according to the rotation of the rotor, and outputs the power of this power generation coil to the ignition coil at an appropriate timing. An ignition control circuit consisting of various electronic components is provided. An ignition coil is connected to the output side of this ignition control circuit.

By the way, if the generating coil, the electronic components for the ignition control circuit, and the ignition coil are installed separately in different parts near the engine body and are electrically connected to each other via lead wires, etc., the above-mentioned lead wires, etc. The applicant has decided to develop an engine in which the generator coil, ignition control electronic parts, and ignition coil are integrated into a unit, because the ignition coil is exposed to the outside, which can lead to damage and deterioration, and the installation occupies a large space, leading to an increase in the size of the device. Provided an ignition device (Japanese Patent Application Laid-Open No. 167164/1986).

However, the ignition system for such an engine is provided with a molded case, the ignition coil is housed in the molded case, the ignition coil is wired to the required location, and then synthetic resin is injected into the molded case and hardened. It takes time to manufacture,
There was a drawback that the cost could not be avoided.

[Problems to be solved by the invention] The present invention eliminates the drawbacks of the above-mentioned prior art, and provides an engine ignition system that has fewer electrical failures, can be made smaller, is easy to manufacture, and is inexpensive. The aim is to provide equipment.

[Means for solving problems]

In order to solve the above problems, the present invention includes an iron core to which an L-shaped ground terminal is riveted, and a bobbin that is fitted into the pole of the iron core and has an output terminal for connecting one end of a wound generating coil. The ignition coil is integrally molded with a ground terminal, input terminal, and output terminal exposed to the outside, and a printed circuit board on which ignition control electronic components are mounted are integrally molded. The printed circuit board has mounting holes that fit the L-shaped ground terminal, the output terminal of the bobbin, the ground terminal and the input terminal of the ignition coil, and each of the terminals is arranged in a circuit pattern around these mounting holes. It is soldered.

[Effect]

According to the present invention having the above configuration, by simply soldering each terminal, the power generating coil and the printed circuit board and the printed circuit board and the ignition coil are electrically connected and mechanically coupled. ,
Thereafter, it is sufficient to simply mold them together using a mold or the like, and a conventional mold case is not required. Therefore, it is extremely easy to manufacture and inexpensive.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is an exploded perspective view of one embodiment. In the figure, reference numeral 1 denotes a U-shaped laminated iron core having poles 1a and 1b, in which insertion holes 2 for a plurality of mounting screws are provided in advance. Also, this iron core 1
consists of a plurality of laminated silicon steel plates, which are joined together by rivets 3. Further, an L-shaped ground terminal 4, which is bent in advance into an L-shape, is fixed by one of these rivets 3, and stands up on the upper surface (one side surface) of the iron core 1. In the case of the embodiment shown in the drawings, the lower surface portion 4a of the ground terminal 4 is extended so as to protrude even after being integrally molded as described later for external connection, but it does not necessarily need to be extended. Also, L
The rising portion 4b of the character-shaped ground terminal 4 has a notch 4c.
is provided so that one end 5a of the power generating coil 5 can be easily tied off. Further, the rising portion 4b of the L-shaped ground terminal 4 is provided with a crease 4d so that the printed board 6 can be secured thereto.

In the case of the embodiment shown in the drawings, one pole 1b of the iron core is provided with an extension 1c as disclosed in Japanese Patent Laid-Open No. 59-145354 by the present applicant. However, in the present invention, it is not particularly necessary to provide it. Further, in the figure, numeral 7 denotes a protruding inner groove having a semicircular cross section for guiding a bobbin 8, which will be described later, and numeral 9 denotes a positioning protrusion for the bobbin 8.

It should be noted that magnetized timing rollers are arranged opposite to each other at the ends of the poles 1a and 1b of the iron core 1.

Reference numeral 10 denotes a bobbin made of a hard synthetic resin molded product, and a power generating coil 5 is wound around the bobbin 10. One end 5a of the power generating coil 5 is connected to the bobbin 1.
It is pulled out of the bobbin 10 through a notch 12 provided in the end flange 11 of the 0, and is tied to the L-shaped ground terminal 4 and soldered. Reference numeral 13 denotes a plate-shaped output terminal inserted into the bobbin 10, which can be integrally embedded during the molding of the bobbin 10 or press-fitted after the bobbin 10 is molded. In the illustrated embodiment, the output terminal 13 is provided on the intermediate flange 14 of the bobbin 10, but it may also be provided, for example, on the end flange 15. Further, the other end 5b of the power generating coil 5 is attached to the output terminal 13 and is further firmly fixed by soldering. 16 is bobbin 10
This is the center mounting hole. Also, 17, 18, 19,
Reference numeral 20 denotes engagement protrusions that are formed on the end flanges 11 and 15 of the bobbin 10 as necessary to further stabilize the attachment of the printed circuit board 6, which will be described later. In the case of the embodiment shown in the drawings, an insulating tape 21 is wrapped around the outer surface of the power generating coil 5.

Further, 8 is also a bobbin made of a hard synthetic resin molded product, and a trigger coil 22 is wound around the bobbin 8, and both ends of the trigger coil 22 are connected to output terminals 23 and 24 attached to the bobbin 8, respectively. It is fixed by soldering. However, these are unnecessary in a type of ignition device that does not require the trigger coil 8. In the figure, 2
5 is a center mounting hole.

Furthermore, 26 is an ignition coil, which mainly consists of a primary coil and a secondary coil (not shown) wound around a bobbin into which an iron core is inserted. It is molded in one piece with the surface exposed.
Note that internally, one end of the primary coil and the secondary coil is connected to a ground terminal 27, the other end of the primary coil is connected to an input terminal 28, and the other end of the secondary coil is connected to an output terminal 29. .

Furthermore, 6 is an electronic component 3 for the ignition control circuit.
This is a printed circuit board on which electronic components 0, 31, 32, 33, etc. are attached, and the electronic components 30, 31, 32, 33, etc. are arranged at appropriate positions and orientations as shown in the figure in order to reduce the space occupied by the entire circuit configuration. There is. Note that FIG. 2 is a perspective view of the printed circuit board 6 of FIG. 1 viewed from below. In the embodiment shown in the drawings, a circuit pattern is formed on the upper surface of the printed circuit board 6 to form a predetermined circuit. and,
The printed circuit board 6 includes the L-shaped ground terminal 4,
Mounting holes (or through holes) 34, 35, 3 that fit the output terminal 13 of the bobbin 10, the ground terminal 27 of the ignition coil 26, and the input terminal 28, respectively.
6, 37 are provided, and the mounting holes 34, 3
By soldering each terminal 4, 13, 27, 28 to the circuit pattern around 5, 36, 37, each terminal 4, 13, 27, 28 is electrically and mechanically connected. It is becoming more and more like this. Also,
In the case of the embodiment shown in the drawings, the printed circuit board 6 is also provided with mounting holes 38 and 39 that fit the output terminals 23 and 24 of the bobbin 8, respectively, and each terminal is formed in the circuit pattern around the mounting holes 38 and 39 as described above. 23,2
4 can be soldered. moreover,
The printed circuit board 6 has engaging protrusions 17, 18 formed on the end flanges 11, 15 of the bobbin 10.
Engagement holes 40 and 41 in which 19 and 20 engage, respectively
and engagement notches 42 and 43 are provided, and a hole 44 is provided to facilitate resin injection during molding.
is provided.

In addition, in the figure, 45 is a spark plug cable, and 46 is a lead wire for a stop switch.

Next, the assembly order of this ignition device will be described.

First, attach the bobbin 1 to the other pole 1a of the iron core 1.
After inserting the center mounting hole 16 of 0 and performing a predetermined positioning operation, one end 5a of the generating coil 5 is tied to the L-shaped ground terminal 4, and then fixed together by soldering.

Further, the center attachment hole 25 of the bobbin 8 is connected to one pole 1b of the iron core 1 from the extension part 1c of the pole 1b.
Insert it and perform the specified positioning work.

Furthermore, the mounting holes 36, 3 of the printed circuit board 6
7, fit the ground terminal 27 and input terminal 28 of the ignition coil 26 into the mounting hole 3.
Solder to the circuit patterns around 6 and 37.
As a result, the ignition coil 26 and the printed circuit board 6 are electrically and mechanically connected.

Next, the printed circuit board 6 to which the ignition coil 26 is connected is placed over the iron core 1 and the bobbins 10, 8, and the respective mounting holes 34, 35, 38, 39 are connected to the L.
The ground terminal 4 is fitted into the output terminal 13 of the bobbin 10 and the output terminals 23 and 24 of the bobbin 8, respectively. At the same time, the locking holes 40, 4 of the printed circuit board 6
1 and the locking notches 42, 43 are the locking protrusions 17, 18, 1 of the end flanges 11, 15 of the bobbin 10.
9 and 20. At this time, the lowered position of the printed circuit board 6 is restricted by the fold line 4d of the L-shaped ground terminal 4 and the end flanges 15 and 16 of the bobbin 10.

After that, each terminal 4, 13, 23, 24 is connected to each mounting hole 34, 35, 38, 39 of the printed circuit board 6.
Solder each circuit pattern around the .

As a result, an electrical connection is established between the generator coil 10 and the printed circuit board 6, and between the iron core 1 and the bobbin 10 and between the iron core 1 and the bobbin 10 via the printed circuit board 6.
The mechanical connection between the ignition device and the bobbin 8 can be firmly and reliably performed, and the ignition device shown in FIG. 3 can be obtained.

Next, after the integration has been ensured in this way, the ignition plug cable 45 is connected to the output terminal 29 of the ignition coil 26, and then the above-mentioned insertion hole 2 of the iron core 1 is connected.
A synthetic resin film 47 is formed by molding the parts other than the outer part with synthetic resin to isolate the inside of the film from the outside air and improve the insulation, durability, etc. of each component. FIG. 4 is a perspective view showing this state.

It should be noted that when the synthetic resin coating 47 is formed, the synthetic resin also penetrates into the spaces between the electronic components 30, 31, 32, 33, etc., and securely holds them.

As described above, according to the present invention, each terminal 34, 3
Just by soldering 5, 27, and 28, the connection between the generator coil 5 and the printed circuit board 6 and the printed circuit board 6
and the ignition coil 26 are electrically connected and mechanically coupled,
Thereafter, it is sufficient to simply mold them together using a mold or the like, and a conventional mold case is not required. Therefore, it is extremely easy to manufacture and inexpensive.

[Effect of idea]

According to the present invention, by integrating the generating coil, the ignition control electronic parts, the ignition coil, etc. into a unit, it is possible to reduce the number of electrical failures and to achieve the advantage of miniaturization.

In addition, since the electrical connections and mechanical connections of each component can be done all at once, manufacturing is significantly easier.
Moreover, the effect of being inexpensive can be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view, FIG. 2 is a perspective view of the printed circuit board in FIG. 1 seen from below, and FIG. 3 is a perspective view showing an assembled state. , FIG. 4 is a perspective view showing the completed state. 1... Iron core, 4... L-shaped ground terminal, 5...
Generator coil, 6... Printed circuit board, 10... Bobbin, 13... Output terminal, 26... Ignition coil, 2
7... Earth terminal, 28... Input terminal, 29...
Output terminals, 30, 31, 32, 33...Electronic components for ignition control, 34, 35, 36, 37...Mounting holes.

Claims (1)

[Scope of utility model registration request] An iron core with an L-shaped ground terminal riveted to it,
A bobbin that is provided with an output terminal that connects one end of the wound generator coil and that is fitted into the pole of the iron core, an ignition coil that is integrally molded with a ground terminal, an input terminal, and an output terminal exposed to the outside, and the above-mentioned ignition coil. An ignition control electronic device that has mounting holes that fit an L-shaped ground terminal, a bobbin output terminal, an ignition coil ground terminal, and an input terminal, and each of the above terminals is soldered to a circuit pattern around these mounting holes. An engine ignition device characterized by being integrally molded with a printed circuit board on which parts are mounted.