JPH0221792Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a support device for a small piezoelectric vibrator.

Among piezoelectric oscillators, crystal oscillators have been widely used as clock sources for computers. In recent years, crystal oscillators that not only contain a crystal oscillator but also have circuit components such as transistors, ICs, resistors, and capacitors built into the container have been announced. 1st
Figure a shows an example of such a crystal resonator. A conductive material such as silver palladium is baked onto a ceramic insulating substrate 1, an electronic component 2 is soldered thereon, a crystal diaphragm 4 is placed on a cylindrical metal stand 3, and it is fixed with a conductive adhesive 5. ing. Then, the insulating substrate 1 is fixed to the hermetic terminal 19, and the can 20 shown by the broken line is
It has an airtight structure. FIG. 1b is a partial cross-sectional view showing the crystal diaphragm 4 placed on the support base 3. As shown in FIG. However, such a support base has a rigid structure for the piezoelectric diaphragm, and there is a risk that the crystal diaphragm will peel off due to strong impact. In addition, the crystal diaphragm is
A small rectangular crystal diaphragm is used, but when placing this crystal diaphragm on a support stand, it is difficult to align and achieve positional accuracy.

The object of the present application is to eliminate the aforementioned drawbacks and to provide a support device that is easy to assemble. A detailed explanation will be given below with reference to examples.

FIGS. 2a and 2b are perspective views showing an embodiment of the present invention. In FIG. 2b, the support fitting 6 extracted from the metal plate by etching or pressing has two support parts 7 for mounting the crystal diaphragm, and leg parts 8 for clamping and fixing the insulating substrate. The leg portion 8 is bent in a direction perpendicular to the support portion 7. FIG. 2a is a partial perspective view showing an example in which a supporting metal fitting is fixed to a notch 9 of an insulating plate 1 and a crystal diaphragm 4 is placed thereon. 1 provided on the insulating substrate 1 with the support metal fitting 6
It is fixed to the pair of notches 9. At this time, the legs 8 of the support fittings 6 are designed to sandwich the insulating substrate 1 in the thickness direction. Insulating substrate 1 contains silver palladium 10
is baked into it and is electrically connected to other electronic components. This silver palladium and the supporting metal fitting 1 are fixed electrically and mechanically with solder or a conductive adhesive. Further, the support portion 7 and the crystal diaphragm 4 are fixed with a conductive adhesive 11.

FIG. 3 is a sectional view taken along the longitudinal direction of the crystal diaphragm 4 when the crystal diaphragm 4 is mounted. The support fitting 6 is fixed to the notch 9 of the insulating substrate 1 so as to sandwich the insulating substrate 1 in the thickness direction. Note that an excitation electrode 12 for excitation is placed on the main surface of the crystal diaphragm 4.

Figure 4 shows the insulating substrate 1 together with the crystal diaphragm 4.
An example is shown in which electronic components 2 such as ICs, transistors, resistors, and capacitors are placed to form a piezoelectric oscillator. The hermetic terminal 19 and the can 20 shown by broken lines form a dense structure. In this way, it goes without saying that this support device can be used not only as an oscillator but also as a single crystal resonator.

The present application has the following effects.

(1) It has a more flexible structure than conventional supports, and has better vibration resistance.

(2) When fixing the supporting metal fittings to the insulating substrate, the positional accuracy is improved due to the notches in the substrate, and the positioning accuracy of placing the crystal diaphragm is also improved accordingly, resulting in a crystal resonator with less variation. .

(3) Conventionally, the support stand and the crystal diaphragm were fixed flat to each other, but since the support fittings are positioned to sandwich the crystal diaphragm, the fixation strength is improved.

(4) The notches provided in the insulating substrate not only improve positional accuracy but also facilitate assembly, helping to reduce man-hours.

As described above, the present invention makes it possible to provide a support device that has better vibration resistance than conventional support stands and is easier to assemble.

In this application, we have taken an example in which the crystal diaphragm is supported by two support parts, but the support metal fittings are not limited to such support parts and have a structure that holds an insulating substrate between them, for example, as shown in FIG. It may also be a supporting metal fitting.

Although crystal is used as the piezoelectric material in the embodiments, other materials such as lithium tantalate, lithium niobate, piezoelectric ceramic, etc. may also be used.

Further, although ceramic is used as the insulating substrate, other insulating materials such as glass and crystal may also be used.

[Brief explanation of the drawing]

Figures 1a and b are perspective views showing a conventional crystal support method, Figures 2a and b are perspective views showing a support device according to the present invention, and Figure 3 is a perspective view of a crystal diaphragm placed on the support device. The sectional view and FIG. 4 are perspective views showing an example assembled as a piezoelectric oscillator. FIG. 5 is a sectional view showing another embodiment. 1... Insulating substrate, 4... Piezoelectric vibrator, 6, 6'
...Supporting metal fitting, 9...Notch part.

Claims (1)

[Scope of utility model registration request] A support for a piezoelectric vibrator, characterized in that a pair of notches are provided in an insulating substrate, a support fitting is clamped and fixed to the notch in the thickness direction of the insulating substrate, and a piezoelectric plate is supported by the support fitting. Device.