JPH051093Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a discharge device that uses a piezoelectric element plate to boost an input voltage to generate a high voltage and generate discharge sparks from a discharge electrode.

<Prior art> When a voltage is applied to a piezoelectric element plate, it has a basic property that it extends in the polarization direction and contracts in the right angle direction in response to the volume change due to this strain. Using this,
Input electrodes are formed on the front and back sides of the piezoelectric element plate, and these act as driving parts.The piezoelectric element plate is distorted in the thickness direction by applying voltage from the input electrodes, and the displacement in the right angle direction due to this distortion causes the piezoelectricity of the power generation part to be increased. A piezoelectric transformer is known in which a stress is applied to an element plate to cause it to become distorted, thereby inducing a voltage in phase opposite to the input voltage from an output electrode of the power generation section.

This piezoelectric transformer is designated as Special Publication No. 46-4109.
No. 46-7891, etc.

<Problems to be solved by the invention> By the way, in a discharge device using this piezoelectric transformer, conventionally, the output electrode formed on the end face of the piezoelectric transformer and the discharge electrode are connected with a lead wire. It was hot.

For this reason, there was a drawback that the lead wire could be peeled off from the output electrode due to vibration of the piezoelectric transformer or the like. Furthermore, there was also a drawback that the overall structure of the discharge device lacked cohesiveness due to the lead wires.

The object of the present invention is to provide a discharge device that can eliminate the above-mentioned conventional drawbacks.

<Means for solving the problem> The present invention forms input electrodes on the front and back surfaces of approximately half the area of a rectangular piezoelectric substrate, polarizes this area in the thickness direction, uses this as a driving part, and a piezoelectric transformer in which an output electrode is formed on the outer end surface of a region, and the region is polarized in the longitudinal direction to serve as a power generation section; a conductive connector portion having a recessed cross section and fitted to the end of the output electrode; This discharge device is characterized by comprising a conductive connection jig formed by integrating a discharge electrode protruding from the connector portion.

<Function> When an alternating voltage is applied to the input electrode, the drive section is distorted in the thickness direction, and in response to the volume change due to this distortion, the power generation section receives compressive stress, and a voltage is induced in the output electrode on the outer end surface. Ru. By the way, since the connector portion of the conductive connection jig is tightly fitted to the outer end surface, an output is taken out by the connector portion, voltage is applied to the discharge electrode, and spark discharge occurs.

<Example> An example of the present invention will be described with reference to FIGS. 1 and 2.

Here, 1 indicates a piezoelectric transformer, which is mainly composed of a rectangular piezoelectric substrate 2 made of a piezoelectric material such as barium titanate or PZT porcelain. On approximately half of this piezoelectric substrate 2, silver electrodes 3, 3 are formed on the front and back sides. Furthermore, an output electrode 4 is formed by silver vapor deposition so as to cover the outer end surface of the piezoelectric substrate 2.

In the above structure, first, a DC voltage is applied between the electrodes 3, 3 and the output electrode 4 to polarize the other half region of the piezoelectric substrate 2 in the longitudinal direction, and the other half region is used as the power generation section y. Next, a DC voltage is applied between the electrodes 3, 3 to perform polarization in the thickness direction, and the electrodes 3, 3 are polarized in the thickness direction.
The space between them is defined as a drive section x.

A conductive connection jig 10 made of a metal material is attached to the outer end of the piezoelectric substrate 2. The connection jig 10 includes a connector part 11 having a connecting groove 12 having a concave cross section that surrounds and tightly fits the output electrode 4, a connection base 13 protruding from the center of the connector part 11, and a connection base 13 that protrudes from the center of the connector part 11. Discharge electrode 1 equipped with a sharp discharge end 15 further protruding from the end of the base 13
4 are coupled. Then, as shown in FIG. 2, the connector part 11 is fitted onto the end of the piezoelectric substrate 2,
The output electrode 4 and the connecting groove 12 are brought into surface contact to ensure their electrical connection. At this time, the connector portion 1
In order to maintain a connection strength of 1, soldering 16 is applied to the upper and lower inner surfaces and outer edges of the connecting groove 12.

In the above configuration, the electrodes 3 of the piezoelectric transformer 1,
When the AC power source 7 is connected between
The power generation section y receives compressive stress, and a voltage is induced in the output electrode 4 on its outer end surface. A connecting jig 10 is connected to the output electrode 4 via a connector portion 11, whereby a high voltage is applied to the discharge electrode 14, and a spark discharge is generated from the sharp discharge end 15.

In the above configuration, the connection jig 10 is directly connected to the output electrode 4 via the connector portion 11, and the electrical connection is reliably established. Therefore, unlike lead wires, vibration of the piezoelectric substrate 2 will not damage the electrical connection.

<Effects of the invention> As described above, in the present invention, the connector portion 11 of the connection jig 10 is externally fitted onto the output electrode 4 of the piezoelectric substrate 2 to make an electrical connection, unlike the lead wire connection. , the electrical connection is not affected by the vibration of the piezoelectric substrate 2, and a stable spark discharge can be produced, and the piezoelectric transformer 1 and the discharge electrode 14 are integrated, making a good arrangement, and can be used as a discharge source for various devices. When used, the design becomes easy and the whole structure can be made compact.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, in which FIG. 1 is an exploded perspective view and FIG. 2 is a longitudinal sectional side view of a connecting portion. 1...Piezoelectric transformer, 2...Piezoelectric substrate, 3,3
...Input electrode, 4...Output electrode, 10...Connection jig, 11...Connector part, 12...Connection groove, 14...
...Discharge electrode, 15... Sharp discharge end, x... Drive section, y... Power generation section.

Claims (1)

[Claims for Utility Model Registration] Input electrodes are formed on the front and back surfaces of approximately half the region of a rectangular piezoelectric substrate, and this region is polarized in the thickness direction, and this is used as a driving section, and the outer end surface of the other region is polarized. a piezoelectric transformer in which an output electrode is formed and the region is polarized in the longitudinal direction to serve as a power generation section; a conductive connector portion having a recessed cross section that fits onto the end of the output electrode; and a piezoelectric transformer that protrudes from the connector portion. A discharge device characterized by comprising a conductive connection jig formed by integrating a discharge electrode and a conductive connection jig.