JPS6122348Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piezoelectric plate holding device that is the basis of the structure of a piezoelectric vibrator, and particularly to a piezoelectric plate holding device suitable for a small piezoelectric vibrator.

Many conventional holding devices of this type have been proposed, but due to the need for miniaturization, they have a structure in which a piezoelectric plate is directly fixed to a fixed end.

However, such a holding device has the drawback that external mechanical vibrations and shocks directly affect the piezoelectric plate, causing the piezoelectric plate to peel off from the fixed end or damage the piezoelectric plate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a piezoelectric plate holding device that can sufficiently withstand mechanical vibration and shock for a miniaturized piezoelectric plate.

Another object of the present invention is to provide a piezoelectric plate holding device that is easy to assemble, whereas conventional holding devices tend to complicate the assembly as piezoelectric plates become smaller. There is something to do.

FIGS. 1a and 1b are a perspective view of a piezoelectric plate holding device showing an embodiment of the present invention, and a developed view showing an example of the original thin metal plate.

In the figure, a piezoelectric plate 1 is a plate-shaped piezoelectric material such as quartz, lithium tantalate, or piezoelectric ceramic, and in this example has a rectangular shape with beveled ends in one length direction.

The thin metal plates 2 and 3 are thin plates made of metal such as phosphor bronze, nickel silver, or stainless steel, and have a thickness of several hundred to several tens of micrometers. Bend it almost 90 degrees,
One obliquely symmetrical end is fixed to the fixed ends 4 and 5 by spot welding, soldering, etc., and grooves 6 and 7 into which the piezoelectric plate 1 is inserted are formed on the other side. In this example, the two thin metal plates 2 and 3 are fixed so that the grooves 6 and 7 are at the same height and their openings are oriented in the same direction. Incidentally, V-shaped notches are provided at both widthwise ends of the central bending lines A and B, and by bending based on the notches, it is easy to bend and can be bent at an accurate position.

In order to make the grooves 6 and 7 at the same height and their openings in the same direction, in addition to using an appropriate jig, as shown in FIG. The two thin metal plates 2 and 3 are connected to the fixed ends 4 and 3 by bending the center bending lines A and B as described above, and bending the cutting line C or D approximately 90 degrees in the same direction. This can be easily done by fixing it to 5 and then cutting along the cutting lines C and D. In addition, at both ends of the cutting lines C and D in the width direction, a notch is provided in order to make it easier to bend, similar to the center bend line, and a notch is provided in the middle of the width direction, which is indicated by an "O" in the diagram. A hole is provided so that it can be easily cut with a tool such as a nipper.

The fixed ends 4 and 5 are fixed through a base 8 which contains an insulating material such as glass inside and whose outer circumference is surrounded by a metal tube. The insulating material is exposed on the surface, and a predetermined distance (for example, 1 mm) is maintained between this surface and the metal thin plates 2 and 3 described above so as not to come into contact with each other.

In this way, the holding device of this example can maintain the X, Y, Z even if mechanical vibrations and shocks are applied from the outside.
If the orthogonal coordinate axes of are taken as shown in the figure, the fixed parts fixed to the fixed ends 4 and 5 of the thin metal plates 2 and 3 will respond to an external force in the X-axis direction, and the cut grooves 6 will similarly respond to an external force in the Y-axis direction. It has flexibility in any direction by bending the holding parts formed with 7 and 7, and also by twisting from the center bending lines A and B against an external force in the Z-axis direction. Because of this, I can withstand it well.

In addition, regarding the amount of flexibility, center bending lines A and B
The amount can be increased by providing a cut groove in the groove.

When actually assembling a piezoelectric plate using the holding device of this example, it can be done semi-automatically or fully automatically because the piezoelectric plate can be inserted into uniform locations (cut grooves).

The piezoelectric plate 1 of this example has a rectangular shape as described above, but it may have any other shape as long as it is held on one side, such as a base holding type of a tuning fork-shaped piezoelectric vibrator.

FIG. 2a is a perspective view of a piezoelectric plate holding device showing another embodiment of the present invention, and FIGS. 2b and 2c are
FIG. 3 is a developed view showing an example of an original thin metal plate.

In the holding device of this example, two thin metal plates 1
Points 0 and 11 are made at fixed ends 15 and 16 so that cut grooves 12 and 13 formed therein insert both ends on the center line of one length dimension of the piezoelectric plate, and the openings thereof face each other. It is fixed by welding etc.

In order to insert the piezoelectric plate 14 as described above, the intervals between the grooves 12 and 13 are set so that the piezoelectric plate 1
The length is adjusted to one of the length dimensions of 4. This spacing can be done by using a suitable jig, but it can also be done by using common connecting parts 17, 18, 19 as shown in FIG. 1b, as shown in FIG. 1b and c. .

That is, for the figure b, first, the common connection part 1
The bending lines G, H and the cutting line I of 7 are bent approximately 90 degrees in the same direction, and the thin metal plates 10 and 11 are fixed to the fixed ends 15 and 16, and then the above-mentioned cutting lines I and J are cut. . In addition, the central curved line E,
The bending of F is performed at the time of bending the common connecting portion described above or after cutting the cutting line.

In Figure C, any one of the cutting lines M, N, O, or P of the common connecting portions 18 and 19 is cut, and if the cutting line M is cut,
Using the common connecting part 19 as a connecting part, the thin metal plates 10 and 11 are connected from the central bending line K to the fixing part side, and from each of the central transverse line L and cutting line P to the common connecting part 19 side. Each is bent approximately 90 degrees in the same direction (clockwise in this example), and in this state, the thin metal plates 10 and 11 are fixed to the fixed ends as described above, and then the remaining uncut cutting lines N and O are cut. .

The embodiment shown in FIG. Even if the dimensions become considerably large, the advantage is that both ends are held.

In the above embodiments of the present invention, the shape of the cut groove is V-shaped in accordance with the bevel processing of the piezoelectric plate, but it is not limited to this, and may be U-shaped or U-shaped. good.

[Brief explanation of the drawing]

FIG. 1a is a perspective view of a piezoelectric plate holding device showing an embodiment of the present invention, and FIG. 1b is a developed view showing an example of the original thin metal plate. FIG. 2a is a perspective view of a piezoelectric plate holding device showing another embodiment of the present invention, and FIGS. 2b and 2c are developed views showing an example of the original thin metal plate, respectively. Explanation of symbols, 1, 14...Piezoelectric plate, A, B,
E, F, K, L...Central curved line, 2, 3, 10,
11... Metal thin plate, 6, 7, 12, 13... Cut groove, 4, 5, 15, 16... Fixed end.

Claims (1)

[Claims for Utility Model Registration] (1) Two thin metal plates whose central bending lines are bent so that they face each other and are obliquely symmetrical, one end of which is obliquely symmetrical to each other is fixed to a fixed end, and A piezoelectric plate holding device characterized in that a cut groove into which a piezoelectric plate is inserted is formed on the other side of a thin metal plate. (2) In claim (1) of the utility model registration, the two thin metal plates are such that the cut grooves formed on each of them are at the same height and the openings of the cut grooves are in the same direction. A holding device for a piezoelectric plate, characterized in that the holding device is fixed to the fixed end. (3) In claim (1) of the utility model registration claim, the two thin metal plates are such that the cut grooves formed in each insert the longitudinal ends of the piezoelectric plate, and so that the openings are facing each other,
A piezoelectric plate holding device, characterized in that the device is fixed to the fixed end.