JP2002246669A - Piezo positioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piezo positioner where the displacement quantity of elements can be enlarged. SOLUTION: In the piezo positioner constituted of piezo element strings A formed of piezo ceramic, the piezo element strings are electrically connected to a meandering conduction line C or a helical conduction line which is pointed/ jointed to the respective elements.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a piezo positioner, and more particularly to a piezo positioner comprising a series of piezo elements made of piezoelectric ceramics.

[0002]

2. Description of the Related Art Conventionally, in a piezo positioner using a series of piezo elements made of piezoelectric ceramics, a linear conduction line shown in FIG. 1 is connected to the surface of each element shown in FIG. As shown in FIG. 3, a wire was joined to the provided electrode portion, and the conductive wire was bent and connected between the elements.

[0003]

However, in this electrical connection, since the expansion and contraction portion of the element is restrained by the linear conductive wire, the displacement of the element is suppressed, and the performance of the piezo positioner is reduced. There was a problem of doing.

[0004] The present invention has been made in view of the problems of the above-described piezo positioner, and has the following objects.
An object of the present invention is to provide a piezo positioner capable of increasing the displacement of an element.

[0005]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object, and as a result, using a stretchable wire as a conductive wire and attaching it to the electrode portion of each element,
The inventors have found that the displacement amount of the element can be increased, and have completed the present invention.

That is, the present invention provides (1) a piezoelectric positioner comprising a series of piezoelectric elements made of piezoelectric ceramics,
A piezo positioner (Claim 1) is characterized in that the piezo element series is electrically connected to each other by meandering conductive lines spotted and joined to each element. (2) Piezo element series made of piezoelectric ceramics. Wherein the piezo element series is electrically connected by a helical conductive wire spotted and joined to each element. I do. This will be described in more detail below.

As described above, in the piezo positioner comprising the piezo element series according to the present invention, the piezo element series is electrically connected to each other by means of meandering conductive lines spotted and joined to each element. (Claim 1).

This is a piezo positioner in which the conductive wires are first spotted and joined to the respective elements, so that the displacement of the elements is not suppressed, and at the same time, the conductive wires are made of a meandering conductive wire which can expand and contract as shown in FIG. For this reason, even if a force is applied to the conductive wire, the conductive wire is buffered at the stretchable portion of the conductive wire, so that a large force is applied to the spotted portion and the conductive wire does not peel off.

As another piezo positioner different from the above, a piezo positioner in which a series of piezo elements are electrically connected by helical conduction lines spotted and joined to each element is provided. ).

[0010] Even in the present invention, as in the above, since the conductive wire is spot-joined to each element, the piezoelectric positioner is not restricted in the displacement of the element. At the same time, the conductive wire is connected as shown in FIG. Because it is a helical conductive line that can expand and contract, even if force is applied to the conductive line, it is buffered at the stretchable portion of the conductive line, so a force is applied to the spotted part and the piezo positioner that does not peel off the conductive line Become.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to specific examples. First, a ceramic piezo element (manufactured by Taiheiyo Cement Corporation) is prepared.

Using the four piezoelectric elements, the four piezoelectric elements are adhered with an adhesive as shown in FIG. 5, and the meandering conducting wire made of phosphor bronze shown in FIG. As shown in FIG. 5, four piezo elements were formed by spot bonding with 6/4 eutectic solder.

Similarly, four piezo elements are used, and the four elements are bonded with an adhesive as shown in FIG. 7, and a helical phosphor bronze shown in FIG. As shown in FIG. 7, the conductive wires were spotted and joined with 6/4 eutectic solder to form four piezo element series.

As another comparison, similarly, four piezo elements are used, and the four elements are adhered with an adhesive as shown in FIG. 3, and are attached to the electrode portions of each of the bonded elements as shown in FIG. As shown in FIG. 1, linear continuity wires made of phosphor bronze were lined and joined with 6/4 eutectic solder to produce four piezo element series.

The displacement of the obtained piezo element series was measured by an electric micrometer. Table 1 shows the results.

[0016]

[Table 1]

As is clear from Table 1, it was confirmed that the displacement of the piezo elements connected in a spotted manner was larger than that of the piezo elements connected in a line connection. This indicates that the piezo positioner of the present invention can be a piezo positioner capable of increasing the displacement of the element.

[0018]

As described above, according to the piezo positioner of the present invention, a piezo positioner having a larger displacement than the conventional one can be obtained. This allows
For example, the performance of a piezo positioner used for a gas flow meter or the like can be improved.

[Brief description of the drawings]

FIG. 1 shows a conventional linear conducting wire.

FIG. 2 shows a piezo element and its electrode part.

FIG. 3 shows a conventional series of piezo elements connected by a straight conductive line.

FIG. 4 shows a meandering conductive line used in the present invention.

FIG. 5 shows a series of piezo elements connected by meandering conductive lines according to the present invention.

FIG. 6 shows a helical conduction line used in the present invention.

FIG. 7 shows a series of piezo elements connected by a helical conduction line of the present invention.

[Explanation of symbols]

 A: Piezo element B: Electrode part C: Conductive wire D: Solder part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Kumamoto 1568-4 Konumata, Togane, Chiba Pref.Central Research Laboratories, Central R & D Center, Electronics Technology Center (72) Inventor Tohru Ezaki 1568, Konumata, Togane, Chiba Prefecture -4 Taiheiyo Cement Co., Ltd. Central Research Laboratory Electronics Technology Center

Claims (2)

[Claims] 1. A piezo positioner comprising a piezo element series made of piezoelectric ceramics, wherein the piezo element series comprises:
A piezo positioner, wherein the piezo positioner is electrically connected to each element by a meandering conductive wire that is spot-joined. 2. A piezo positioner comprising a piezo element series made of piezoelectric ceramics, wherein the piezo element series comprises:
A piezo positioner, wherein the piezo positioner is electrically connected to each element by a helical conductive wire spot-joined.