JPS6145889B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tone-shaped vibrator in which a crystal oscillator is configured in a tone-shaped shape, and particularly to a tone-shaped vibrator whose support mechanism has been improved to reduce the leakage of vibration energy. .

In general, a tone-shaped vibrator is used as a low frequency band vibrator. In order to form both legs of an onomata type vibrator, a mechanical processing method such as a wire saw, a blade saw, or an ultrasonic wave is used to process crystal or the like. For this reason, the legs of the Ontomata are often not completely symmetrical, and are often asymmetrical, resulting in a difference in the natural frequencies of the left and right legs.

FIGS. 1A and 1B are a perspective view and a cross-sectional view of a conventional sound hook type vibrator. This tone-shaped vibrator includes a support base 2 provided with a pair of electrode leads 3, and a tone-shaped vibrator 1 having electrodes. Motsu. The bottom portion 1c of the tone-shaped vibrator 1 is fixed to the support base 2 with an adhesive 4, and the electrodes of the tone-shaped vibrator 1 are connected to electrode leads by soldering or a conductive adhesive 5.

In such a conventional configuration, since the bottom part 1c of the sound-shaped vibrator 1 is completely fixed to the support base 2, the vibration energy due to the difference in the natural frequencies of the left and right legs 1a, 1b leaks to the support base 2. I end up.

In such an acoustic vibrator, since the vibration frequency is generally low, the wavelength is long and the leakage is large. This is transmitted to the support base 2, causing the support base 2 to vibrate. Furthermore, since the tone-shaped vibrator is covered with a cover, vibrations are transmitted to the cover, and the vibration of the cover disturbs the resonant frequency of the tone-shaped vibrator itself. Therefore, if the leakage energy is large, the effective energy of the vibrator itself will decrease and the resonant frequency of the vibrator itself will be out of order. This leads to an increase in the CI (crystal impedance) value.

In order to prevent this, as shown in FIG.
A configuration supported only by connections has been proposed.

According to this configuration, the bottom surface 1c of the sound-shaped vibrator 1
Since it is not fixed to the support base 2, there is almost no leakage energy, which is ideal. However, since the above-mentioned support is only the connection between the electrode and the electrode lead 3, the impact resistance and vibration resistance are weak, and the reliability is low. In particular, since the electrode is formed of a thin film, the adhesion strength of the thin film decreases when soldering or the like is performed, making the electrode particularly weak in shock resistance and vibration resistance.

In view of the above-mentioned points, an object of the present invention is to provide a sound-shaped vibrator having a structure that has excellent shock resistance and vibration resistance and has a structure with little leakage energy.The present invention will be explained below with reference to the drawings.

3A and 3B show a perspective view and a sectional view of a first embodiment of the present invention, in which the same parts as those of the conventional type shown in FIGS. 1 and 2 are designated by the same reference numerals. 7 is a support plate such as a ceramic plate.

The difference from the conventional structure shown in FIGS. 1 and 2 is that the support plate 7 is attached to the bottom surface 1c of the vibration element 1 and the adhesive material
The support plate 7 is fixed to the electrode lead 3 by the adhesive 4, and the support plate 7 is fixed to the electrode lead 3 so as not to come into contact with the support base 2. It is. With this configuration, the bottom surface 1c of the sound-shaped vibrator 1 is fixed to the support plate 7 having a large area, so that the sound-shaped vibrator 1
is firmly fixed to the support plate 7. Further, since the electrode leads 3 extending from the support base 2 are fixed to the support plate 7, the sonic horn type vibration element 1 is firmly held on the support base 2 via the support plate 7 and the electrode leads 3.
Further, since the area of the support plate 7 is large, the total energy leaking to the support plate 7 on the bottom surface 1c of the sonic vibrator 1 is dispersed over the entire surface of the support plate 7, and the energy per unit area of the support plate 7 becomes small. Since the electrode lead 3 having a small cross-sectional area is connected to the support plate 7 having a small energy per unit area, the energy leaking to the support base 2 is reduced.

FIG. 4 shows a sectional view of a second embodiment of the present invention, in which the same parts as those of the first embodiment shown in FIG. 3 are designated by the same reference numerals.

The difference from the first embodiment shown in FIG.
is composed of two layers, and the lower support plate 7 receives the adhesive 4 leaking through the lead 3 insertion hole of the upper support plate 7, and the adhesive 4 flows into the inside 2b of the support base 2. It is designed to prevent it from sticking. Therefore, the non-contact of the support plate 7 with the support base 2 is further ensured. Note that 2a is the outer peripheral portion of the support base 2, which has a sufficient height to guide the support plate 7.

FIG. 5 shows a sectional view of a third embodiment of the present invention, in which the same parts as those of the second embodiment shown in FIG. 4 are designated by the same reference numerals.

The difference from the second embodiment shown in FIG. 4 is that collars 3a and 3b are provided above the electrode lead 3, and the collars 3a and 3b securely hold the support plate 7 and can be bonded. This prevents the material 4 from flowing into the support base 2.

FIG. 6 shows a sectional view of a fourth embodiment of the present invention, in which the same parts as those of the third embodiment shown in FIG. 5 are designated by the same reference numerals.

The difference from the third embodiment shown in FIG.
A recess is formed at c', and the auxiliary lead 3d is fitted into the recess.

FIG. 7 shows a sectional view of a fifth embodiment of the present invention, in which the same parts as in the third embodiment shown in FIG. 4 are designated by the same reference numerals.

The difference from the second embodiment shown in FIG. 4 is that the support plate is composed of a fixed base 7a and a terminal plate 7b having two far holes for inserting leads.

FIG. 8 shows a sectional view of a sixth embodiment of the present invention, in which the same parts as those of the second embodiment shown in FIG. 4 are designated by the same reference numerals.

The difference from the second embodiment shown in FIG. 4 is that there is no support stand and an L-shaped plate 3e connected to the electrode lead 3 is provided.

In this case as well, the bottom surface area of the vibrating element 1 is increased by the L-shaped plate 3e, and the same effect can be obtained.
Moreover, it is easier to manufacture than the one shown in FIG.

FIG. 9 shows a front sectional view of a seventh embodiment of the present invention, in which the same parts as those of the second embodiment shown in FIG. 4 are designated by the same reference numerals.

The difference from the second embodiment shown in FIG. 4 is that instead of the support plate 7 used as a hand-holding means, the ends of each electrode lead 3 are made into wide-area parts 3f with a wide area, and these wide-area parts 3f This point forms a supporting surface larger than the area of the bottom surface of the sound-shaped vibrating element 1, and the wide area portion 3f equivalently increases the area of the bottom surface of the vibrating element 1. This embodiment has the advantage of being easy to manufacture because the number of parts is small.

As explained in detail above, according to the present invention,
Since the acoustic waveform vibrating element is fixed by the support means that forms a support surface larger than the area of the bottom surface of the sound waveform vibration element, and is connected to the electrode lead through this support means, the sound waveform vibration element is not connected to the support base. In addition, it is possible to firmly hold the molded vibrating element and obtain an acoustic molded vibrator having excellent impact resistance and vibration resistance. In addition, since the support means forms a certain gap with the support base and is supported by thin electrode leads, leakage energy is small, and even if the case is covered, the vibration frequency will not shift. However, it is possible to provide an extremely excellent tone-shaped vibrator.

[Brief explanation of the drawing]

1A, B and 2A, B are a perspective view and a sectional view showing a conventional tone-shaped vibrator, and FIGS. 3A and B are a perspective view and a sectional view showing a first embodiment of the present invention. Figure, 4th
The figure is a cross-sectional view of the second embodiment of the invention, FIG. 5 is a cross-sectional view of the third embodiment of the invention, and FIG. 6 is a cross-sectional view of the fourth embodiment of the invention. 7 is a cross-sectional view of the fifth embodiment of the present invention, and FIG. 8 is a cross-sectional view of the sixth embodiment of the present invention.
FIG. 9 is a front sectional view of a seventh embodiment of the present invention. In the figure, 1 is an acoustic vibration element, 2 is a support base, and 3
is an electrode lead, 4 is an adhesive, 5 and 6 are solder, and 7 is a support plate.

Claims (1)

[Scope of Claims] 1. A sonic orifice type vibration element, a pair of electrode leads that support the sonic orifice type vibration element and are connected to each electrode thereof, and a support base to which these electrode leads are fixed at a distance. and a supporting means that forms a certain gap between the support base and the supporting surface that is larger than the area of the bottom surface of the sound orifice type vibration element. Child. 2. The sound-shaped vibrator according to claim 1, wherein the support means includes a pair of through holes into which the electrode leads are inserted. 3. The sound-shaped vibrator according to claim 1 or 2, wherein the electrode lead is provided with a flange, and the support means is fixed onto the flange. 4. Claim 1, wherein the support means is comprised of a plurality of laminated support plates.
The sound-shaped vibrator described in item 1 or 2. 5. The sound according to claim 1 or 2, wherein the support means is composed of a fixing base and a terminal plate provided on the fixing base and having a pair of through holes formed therein. Also type oscillator. 6. Claim 1 or 2, wherein the electrode lead includes a lead main body having a recess at its end, and an auxiliary lead that fits into the recess and is fixed to the support means. Otomata type vibrator as described in section. 7. The support means is comprised of an L-shaped plate provided on a part of the electrode lead, and the bottom surface of the sound-shaped vibrator is fixed onto the L-shaped plate. The sound-shaped vibrator according to item 1 or 2. 8. Claims characterized in that the support means is constituted by a wide-area portion formed at the end of each electrode lead, and the bottom surface of the sound rod type vibrator is fixed onto the wide-area portion. The sound-shaped vibrator described in item 1 or 2.