JPS5937553Y2 - Inductance device for piezoelectric unit - Google Patents

Description

[Detailed description of the invention] Generally, the piezoelectric unit UK is made up of a pair of piezoelectric elements P and P arranged opposite each other via a high voltage extraction terminal T. As shown in FIG. In order to improve the ignition performance for gas by increasing the spark discharge energy induced when the piezoelectric unit) U's high-voltage electric wire W1. W
An inductance device is inserted between the two in series with the spark gap G.

The present invention relates to such an inductance device, and the object thereof is to provide an inductance device that allows easy connection of a piezoelectric unit to a high-voltage power line and has a structure with excellent electrical insulation.

The embodiments shown in the drawings will be described below.

Fig. 2 shows an inductance device according to the present invention, in which 1 indicates a bottomed inner hole 1a and a large number of insulating folds 1b on the outer surface.
One needle-like terminal 2 is implanted in the center of the bottom of the bobbin.

3 is a ferrite core inserted into the inner hole 1aK of the bobbin;
The inner hole 1a is sealed in an electrically insulating manner by a sealing plug 4 fitted into the opening of the inner hole 1a.

The other needle-shaped terminal 5 is implanted in the center of the outer surface of the sealing plug 4.

6(/'i) A coil that is dividedly wound between insulating folds 1b on the outer surface of the bobbin 1, one end 6a (winding start end) of the coil is connected to the one needle-shaped terminal 2, and the other end of the leftover coil is 6b
(winding end ends) are connected to the other needle-shaped terminal 5, respectively.

7 has a ferrite core 3 enclosed in the inner hole 1a and a coil 6 on the outer surface.
This is an insulating case for storing and fixing the bobbin 1 wound therein, and is composed of a bottomed cylinder 8 and a lid 9.

A high-voltage electric wire W1. Recesses 8a and 9 for fitting W2
a is provided protrudingly, and the bobbin 10 is inserted into the recesses 8a and 9a.
The needle-like terminals 2 and 5 planted on both end faces are connected to high voltage electric wires w1゜W2
It is made to lead out so as to be electrically connected to the core wire of.

This type of inductance device is connected to the wire drawn out from the high-voltage terminal of the piezoelectric unit, but conventionally the structure was just a coil wrapped around the outer periphery of a ferrite core.
Not only is it very troublesome to connect both ends of the coil to the wire, but the strength of the connection part is also low and the wire easily breaks due to tension or vibration during handling, and the inductance can be reduced due to the adhesion of small amounts of moisture, dust, etc. It also had the disadvantage of deteriorating the electrical performance of the device.

As mentioned above, the inductance device of this invention has a bobbin with a ferrite core sealed in its inner hole and a coil wound around its outer surface, with needle terminals implanted at both ends of the bobbin, and one end of the coil connected to one needle terminal. The other ends of the coils are connected to the respective terminals, and the bobbin is housed and fixed in an insulating case consisting of a bottomed cylinder and a lid, and the needle-shaped terminals are connected to the outer bottom surface of the bottomed cylinder and the outer surface of the lid. Since the high-voltage cable is led out into the protruding recess for connection, it is extremely easy to connect the cable, and the mechanical strength of the connection part is high, preventing accidents such as disconnection, and preventing ferrite cores, coils, etc. Since the inductance component is hermetically insulated and protected by the insulating case, it has the effect of eliminating all of the conventional drawbacks, such as preventing deterioration of electrical performance due to adhesion of moisture, dust, etc.

[Brief explanation of drawings]

FIG. 1 schematically shows a piezoelectric unit and its discharge circuit used to explain the present invention. FIG. 2 shows an inductance device according to the present invention, in which A is a plan view and B is a sectional front view. 1...Bobbin, 1a...Inner hole thereof, 2
...One needle-shaped terminal, 3... Ferrite core, 5... Other needle-like terminal, 6...
Coil, 6a, 6b... Each end of the coil, 7...
...Insulation case, 8...Bottomed cylinder, 9...
...Sealing, 8a, 9a...Recess for electrical cable connection, Wl. W2... Electric wire.

Claims (1)

[Scope of utility model registration request] This is an inductance device that is inserted between the high-voltage wires of a piezoelectric unit in series with the spark gap, and has needle-like terminals implanted at both ends of a bobbin whose inner hole is filled with a ferrite core and a coil is wound on the outer surface. One end of the coil is connected to the needle-shaped terminal, and the other end of the coil is connected to the other needle-shaped terminal, and the bobbin is housed and fixed in an insulating case consisting of a bottomed cylinder and a lid, and the needle-shaped terminal is An inductance device that is led out into a recess for connecting a high-voltage electric wire that protrudes from the outer bottom surface of a bottomed cylindrical body and the outer surface of a lid.