JPS6121581Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improved structure of an ignition device used in an internal combustion engine, and particularly relates to an ignition coil and a primary current control circuit that controls the primary current of the ignition coil. The present invention relates to an ignition device equipped with the following.

[Conventional technology]

Conventionally, in an ignition device equipped with an iron core, a primary coil, a secondary coil, and a primary current control circuit, a circuit pattern is formed of copper foil or the like on one side of a board on which the primary current control circuit is mounted, and the opposite side of the circuit pattern is Electronic circuit components are mounted on the board, and lead wires of the electronic circuit components are drawn out to the circuit pattern side through holes provided in the board, and connected by soldering or the like to form a circuit. This board is placed around the outer periphery of the secondary coil, and lead wires for receiving input from the outside are soldered to the circuit pattern of the board (for example, Japanese Utility Model Publication No. 130124/1982). It is generally known to use a terminal (coupler terminal) instead of a lead wire to accept input from the outside, but the other end of the terminal is inserted into the board from the side opposite to the circuit pattern of the board. Generally, the input section and the circuit are constructed by connecting the terminals with the circuit pattern by soldering on the circuit pattern side, and then inserting a coupler into the terminals.

[Problem that the invention attempts to solve]

However, when connecting the input terminal and circuit pattern using the conventional method, the terminal length is long (approximately 30 mm).
Since the terminal and the board are not fixed sufficiently, the terminal may wobble relative to the board, and the circuit pattern may peel off from the board at the soldered part between the terminal and the circuit pattern, or cracks may occur in the soldered part, resulting in poor conductivity. Defects occurred and became a problem.

Furthermore, since the board is disposed around the outer periphery of the secondary coil, there is a problem in that the electronic circuit components mounted on the board may be destroyed by the high voltage generated in the secondary coil.

Therefore, the present invention is intended to prevent poor conduction between input terminals and circuit patterns, and also to prevent damage to electronic circuit components mounted on a board due to high voltage.

[Means for solving problems]

Therefore, the present invention provides an ignition coil having a primary coil and a secondary coil that is divided and wound in a plurality of winding grooves of a secondary bobbin, and a primary current control circuit that controls the primary current of the ignition coil. In the internal heat engine ignition system, electronic circuit components constituting the primary current control circuit are mounted on a board, the board is placed on the low voltage side of the secondary coil, and the board is molded with an input terminal by resin molding. A terminal is fixed to the substrate, the input terminal portion being inserted into the coupler portion and the circuit forming pattern portion being integrally formed. The present invention provides an internal heat engine ignition device characterized by the following.

[Effect]

As a result, the circuit configuration pattern part is formed integrally with the input terminal part of the terminal, eliminating the need for a soldered connection between the terminal and the circuit pattern, and the board and coupler are integrally formed, eliminating the need for a single coupler. In addition, a board is placed on the low-voltage side of the secondary coil, which is divided and wound in the winding groove of the secondary bobbin, and the electronic circuit components mounted on the board are connected to the high-voltage side of the secondary coil. Enables sufficient insulation distance.

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings. In FIGS. 1 to 4, 1 is an iron core made of laminated magnetic plates, 2 is a primary bobbin in which the iron core 1 is insert-molded with resin, and 201 is a collar of the primary bobbin 2 constituting the winding frame. 202 is case 9
It is a tapered part that taper-fits with the fitting part 901 of the flange 201, and is provided on the outer periphery of one of the flange parts 201 in order to maintain airtightness so that the insulation fixing casting resin 10, which will be described later, does not leak. Reference numeral 203 is a groove for positioning and fixing the substrate 3, which will be described later, and is provided on one side of the other flange portion 201. Reference numeral 3 denotes a board made of resin molding, in which a board part 300 on which electronic circuit components constituting a primary current control circuit for controlling the primary current are mounted and a coupler part 303 into which terminals are inserted are integrally formed. Reference numeral 301 denotes a rectangular hole into which the primary bobbin 2 is fitted, and is provided in the base plate portion 300. 30
2 is the groove 2 of the primary bobbin using the elasticity of the resin.
03 and constitutes a locking mechanism that does not come out once inserted, and is curved from one side of the hole 301 and integrally formed on the base plate 300. The coupler section 303 into which the input terminal section is inserted has a shape such that the input terminal section can be inserted from the back side. Reference numeral 304 denotes a wall section for drawing out the high voltage cord, which is provided in a U-shape on the end face of the substrate section 300 so as to surround the high voltage cord 11, and is designed to ensure sufficient insulation from the high voltage section. Reference numeral 305 denotes a protrusion protruding from the wall 304 for connecting the winding end 6b of the primary coil winding 6, the winding start 8a of the secondary coil winding 8, and one end of the capacitor 4a, which will be described later. After winding the winding end 6b, the winding beginning 8a, and the lead wire of the capacitor 4a around the portion 305, the wires are connected by soldering. 30
Reference numerals 6a to 306j are small holes into which the electronic circuit component connection portions of the terminals configuring the connection circuit of each of the electronic circuit components 4b to 4g are inserted from the back side;
They are located in various places. 5a and 5b are circuit configuration terminals made of brass etc. 501a and 501b
502a to 502e are the input terminal portions thereof, 502a to 502e are the electronic circuit component connection portions, and 503a and 503b are the input terminal portions 501a and 501b and the electronic circuit component connection portion 5.
02a to 502e, and connects these input terminal portions 501a or 501b and electronic circuit component connection portions 502a to 502e.
502d or 502e and the circuit configuration pattern portion 503a or 503b are each bent and formed integrally by press molding. and,
Each input terminal section 501a, 501b is connected to the coupler section 30.
3, each electronic circuit component connection part 502a
~502e are fitted and fixed into the respective small holes 306a~306e. In addition, each of the remaining small holes 306f to 3
06j also has electronic circuit component connection parts 502f to 502
j are fitted and fixed, and each of the electronic circuit component connection parts 502f to 502j is connected by a circuit configuration pattern part (not shown) and formed uniformly by press molding. Further, the electronic circuit component connection portion 502j is connected to the iron core 1 via the lead wire 6c, and by attaching the iron core 1 to the body of a motorcycle, for example, the body is grounded via the iron core 1. A primary coil winding 6 is wound around the primary bobbin 2, and a winding start 6a thereof is connected to the iron core 1. A secondary bobbin 7 around which a secondary coil winding 8 is wound is divided into a plurality of winding grooves. Reference numeral 8 denotes a secondary coil winding, and the number of turns at the beginning and end of the winding is smaller than that at the middle. 801 is the winding start side of the secondary coil winding 8, 802 is the winding end side of the secondary coil winding 8, and the board 3 on which the electronic circuit component 4 is mounted is placed on the winding start side 801 where the voltage is low. It is wrapped in such a way that it is 9 is a case for storing the above-mentioned parts, and 901 is a case for storing the above-mentioned primary bobbin 2.
This is the tapered part of the case 9 that fits with the tapered part 202 of the case 9 to prevent the resin 10 from leaking. Reference numeral 10 denotes a resin filled in the case 9, which uses resin such as epoxy to insulate the coil and fix each component. Reference numeral 11 denotes a high voltage cord, one end of which is connected to the winding end 8b of the secondary coil winding 8 in the case 9.
The other end is externally connected to a spark plug (not shown). Further, each electronic circuit component 4a to 4g will be described in detail. 4a is a capacitor arranged on the side of the secondary coil winding 8. 4b~4
d is a diode, 4e is an adjustment resistor, 4f is a resistor,
4g is a thyristor, which is connected to each electronic circuit component connection section 502a to 502j to constitute a known capacitor discharge type ignition device as shown in FIG. In FIG. 5, 12 is a capacitor charging coil of a magnet generator, and by fitting a connector (not shown) connected to this capacitor charging coil 12 into a coupler part 303, both ends of the capacitor charging coil 12 can be connected to each input terminal. Section 501a~
501b.

In the above embodiment, the configuration corresponding to the gist of the present invention is such that an electronic circuit is placed on the winding start side 801, which is the low voltage side, of the secondary coil 8 which is divided and wound in a plurality of winding grooves of the secondary bobbin 7. The board 3 on which the component 4 is attached is placed, and the board part 300 and coupler part 30 of this board 3 are connected.
3 are integrally formed by resin molding and are inserted into the coupler part 303.
Terminal 5 for circuit configuration formed by integrally forming pattern parts 503a and 503b for circuit configuration
This is the point where a and 5b are fixed to the substrate 3.

Further, in the above embodiment, the substrate 3 is positioned and fixed to the primary bobbin 2, but it may be positioned and fixed to the secondary bobbin 7 or the case 9.

Further, in the above-described embodiment, the electronic circuit component connection portion 502j and the iron core 1 are connected via the lead wire 6c. Alternatively, another electronic circuit component connection portion may be integrally provided by press molding, and this connection portion may be soldered in direct contact with a cut-out portion (not shown) provided on the iron core 1.

Furthermore, in the above-described embodiments, the present invention was applied to a capacitor discharge type ignition device, but it goes without saying that the present invention can also be applied to other non-contact type ignition devices such as a current interrupting type ignition device using a transistor. .

[Effect of idea]

With the above configuration, in the present invention, there is no conduction failure between the input terminal and the circuit pattern, improving quality, and since the board and coupler are integrally formed, the coupler itself is not required, and parts can be reduced. This has the excellent effect of reducing the number of points and assembly man-hours. Furthermore, by winding the secondary coil in separate bobbins and placing the electronic circuit components on the low voltage side of the secondary coil, the electronic components will not be destroyed by high voltage, making the quality even more stable. It has a positive effect.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the device of the present invention;
Figure 2 is a longitudinal sectional view taken along line A-A' shown in Figure 1;
3 is a perspective view showing a board in the device shown in FIG. 1, FIGS. 4A and 4B are perspective views showing terminals in the device shown in FIG. 1, and FIG. 5 is an electric circuit diagram in the device shown in FIG. 1. . 3... Board, 4a to 4g... Electronic circuit components constituting the primary current control circuit, 5a, 5b... Terminal, 6... Primary coil, 7... Secondary bobbin,
300... Circuit configuration board part, 303... Input terminal coupler part, 501a, 501b... Input terminal part, 502a to 502e... Electronic circuit component connection part, 503a, 503b... Circuit configuration pattern part.

Claims (1)

[Scope of utility model registration request] An internal combustion engine ignition device comprising an ignition coil having a primary coil and a secondary coil that is divided and wound in a plurality of winding grooves of a secondary bobbin, and a primary current control circuit that controls the primary current of the ignition coil. Electronic circuit components constituting the primary current control circuit are mounted on a board, the board is placed on the low-voltage side of the secondary coil, and the board is molded with resin to form an input terminal coupler part and a circuit configuration. A terminal for internal combustion is fixed to the substrate, the input terminal section being inserted into the coupler section and the circuit configuration pattern section being integrally formed. Engine ignition system.