JPS6025878Y2 - Ignition system for internal combustion engines - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in ignition devices used in internal combustion engines.

In the conventional method, one end of a tin-plated copper wire is wound around a terminal part provided protruding from the core of the ignition coil and then soldered, and the other end of the tin-plated copper wire is wound around a terminal inserted into a printed board. I attached it and then soldered it.

However, in the conventional method described above, a tin-plated copper wire is used to connect the core of the ignition coil and the printed board, and both ends of the tin-plated copper wire are connected to the terminal part of the core, respectively.
Soldering to a printed board is done by wrapping it around the fixed terminal and then soldering each wire, and wrapping tin-plated copper wire around each terminal in the narrow corners of the core and printed board takes a lot of man-hours. This caused problems during work.

In order to solve the above-mentioned problems, this invention has a terminal part that protrudes from a piece of the iron core that is commonly used as a ground terminal, and a conductor such as a tin-plated copper wire that is soldered and fixed to the printed board of the control circuit. Insert the tip of the connecting wire into the hole in the printed board, soldering is fixed, and the bent part of the connecting wire is formed into an inverted U shape, and the terminal part of the iron core and the connecting wire are shaped like an inverted U shape. The purpose of this invention is to eliminate the need for winding the conductor, reduce the number of soldering points from three to two, and significantly reduce the number of man-hours.

The present invention will be described below with reference to embodiments shown in the drawings.

In Figures 1 and 2, 1 is a connection terminal made by bending a tin-plated wire, and its both ends 1b are connected to holes 3 in the printed board.
After inserting it into A and bending the legs, it is soldered to the printed pattern.

The bent portion 1a of the connecting terminal 1 has an inverted U-shape so that it can be inserted into the terminal portion 2a protruding from the iron core 2 from the direction of arrow A, and is soldered or tightened to be electrically connected to the terminal portion 2a. Fixed.

3 is a printed board equipped with a control circuit for controlling the primary current of the ignition coil, and is fixed to the protrusion 5a of the secondary bobbin 5.

4 is a capacitor, 6 is a secondary winding that is divided and wound around the winding groove on the outer periphery of the secondary pobbin 5, 7 is a primary winding, 8 is a casting resin for fixing insulation, and 9 is a case.

In the above configuration, both ends 1b of the connecting terminal 1 are inserted into the printed board holes 3a in advance and soldered with bent legs.

Note that a circuit element and a capacitor 4 (not shown) are also soldered to the printed board 3 at the same time to form a control circuit.The control circuit is made up of the primary coil 7 and the secondary coil 6 assembled together.
Insert from the direction of arrow A.

When fitting and fixing the secondary bobbin 5 into the projection 5a, the connecting terminal 1 corresponding to the ground terminal of the printed board 3 is connected to the iron core 2.
The bent portion 1a has an inverted U-shape so that it can be easily and automatically connected to the terminal portion 2a of the Electrical continuity can be established between the ground terminal of the printed board 3 and the iron core 2, and work efficiency is greatly improved.

In the above-described embodiment, a tin-plated copper wire was used as the connection wire 7, but the same effect can be obtained even if the conductive plate is press-molded.

As described above, the present invention includes a terminal portion protruding from a piece of the iron core that is commonly used as a ground terminal, and a conductor such as a tin-plated copper wire that is soldered and fixed to the printed board of the control circuit. Bend it and insert the tip into the hole in the printed board.For soldering, form the bent part into an inverted U shape so that it can be easily inserted into the terminal part of the iron core, and then connect the terminal part of the iron core to the connecting wire in an inverted U shape. Since this is fitted, there is no need to wind the conductor, and at the same time, the number of soldering points can be reduced from three to two, which has the excellent effect of significantly reducing the number of man-hours.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the device of the present invention, and FIG. 2 is a perspective view of connection lines in the above embodiment. 1... Connecting wire made by bending a conductor such as a tin-plated copper wire, 1a... Bent part, 1b...
Tip, 2... Iron core, 2a... Terminal section, 3... Printed board, 3a... Hole, 5... Secondary bobbin , 6... Secondary winding, 7... Primary winding, 8... Casting resin for fixing insulation, 9... Case.

Claims (1)

[Scope of utility model registration request] In a device that is equipped with an ignition coil and a control circuit that controls the primary current, the terminal part that protrudes from a piece of the iron core that is commonly used as a ground terminal and the printed circuit board on which the control circuit is mounted are fixed by soldering. a connecting wire formed by bending a conductor such as a tin-plated copper wire, the tip of the connecting wire is inserted into the hole of the printed board and fixed by soldering, and the bent part of the connecting wire is formed into an inverted U shape. An ignition device for an internal combustion engine in which a terminal portion of the iron core and an inverted U-shaped portion of the connection wire are fitted and fixed by soldering.