JPS5915523B2 - Atsumi Beriketsushiyoushindoushino Shijikouzo - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support structure for a thickness-shear crystal resonator, which supports the thickness-shear crystal resonator with earthquake resistance.

In a conventional structure for supporting a thickness-shear crystal resonator, such as an AT-cut crystal resonator, as shown in FIG. Supported internally.

In such a conventional support structure, when vibration or shock is applied from the outside, the amplitude of the AT-cut crystal resonator 1 tends to increase, and especially when the AT-cut crystal resonator 1 swings in the vertical or horizontal directions, the AT-cut crystal resonator 1 tends to increase in amplitude. 1 may collide with the inner wall of the case 4 and be damaged.

The present invention proposes a thickness-shear crystal resonator that avoids the above-mentioned conventional defects and improves earthquake resistance.
The details will be explained below with reference to the illustrated embodiments.

FIG. 2 shows an embodiment of a support structure for a thickness-shear crystal resonator according to the present invention, and reference numeral 5 designates an AT-cut crystal resonator as a thickness-shear crystal resonator.

The AT-cut crystal resonator 5 has a main electrode 67 near one end in the length direction of the surface, and an extraction electrode 89 extending from the main electrode 67 to the other end in the length direction. A support hole 1011 serving as a support portion is provided at the end where the extraction electrode 89 extends.

Reference numeral 12 denotes a first support piece that supports the AT-cut crystal oscillator 5, and has a flat plate shape with a long vertical dimension and a short horizontal dimension in a cross section perpendicular to the length direction. An elastic plate made of a conductor is formed into a triangular shape with a pointed tip so as to have a flat portion 12a and a large spring constant in the vertical direction. The child 5 is fixedly supported by a bonded body (not shown) such as a conductive adhesive or a bonder.

Further, reference numeral 13 denotes a second support piece that supports the AT-cut crystal resonator 5, and unlike the first support piece 12, the vertical dimension in the cross section perpendicular to the length direction is short, and the horizontal dimension is short. A flat portion 13a having a long flat plate shape and extending in a substantially horizontal direction.
It is formed into a triangular shape with a pointed tip by an elastic plate made of a conductor so that the spring constant in the lateral direction is large.

That is, the second support piece 12 is arranged such that its flat part 13a has a substantially perpendicular relation to the flat part 12a of the first support piece 12, and the support hole 11 is formed in the pointed portion of the second support piece 12. The AT-cut crystal resonator 5 is fixedly supported via a bonded body (not shown) such as a conductive adhesive.

The first support piece 12 and the second support piece 13 are fixed to a predetermined position, for example, the inner wall of the case 14, and support the AT-cut crystal resonator 5, and at the same time support the AT-cut crystal resonator 5 at the extraction electrode 89. It is electrically connected to the main electrode 67 via, and serves as an electrode terminal for the main electrodes 6 and 7.

If the AT-cut crystal resonator 5 is fixedly supported at the tips of the first support piece 12 and the second support piece 13 in this way, external forces such as vibrations and shocks are applied in the lateral direction shown by arrow A, for example. At this time, a force acts on the first support piece 12 in a direction perpendicular to the plane portion 12a, while a force acts on the second support piece 13.
Since a force acts on the plane portion 13a in a horizontal direction, the first support piece 12 is easily elastically deformed by a weak force, but the second support piece 13 is difficult to be elastically deformed. As a result, the AT-cut crystal oscillator 5 can be supported softly by the first support piece 12, and can be strongly supported by the second support piece 13, so that the AT-cut crystal resonator 5 can be supported even when subjected to a large collision. It is possible to prevent the vibration of the cut crystal resonator 5 from becoming large.

Further, when an external force such as vibration or impact is applied in the vertical direction indicated by arrow B, the AT-cut crystal resonator 5 is supported softly by the second support piece 13, and the first
The support pieces 12 can strongly support the AT-cut crystal resonator 5 so that it does not swing significantly.

Therefore, the AT-cut crystal resonator is thick (there is no risk of swinging and colliding with the inner wall of the case, etc.) as in the conventional case, and
Damage to the T-cut crystal resonator 5 can be prevented.

FIG. 3 shows still another embodiment of the support structure for the thickness shear crystal resonator according to the present invention. This is an integrally formed point.

The first and second support pieces 24 and 25 are made of a single insulating plate, and their bases are bent into a substantially right-angled shape, while their tips are formed into a thin triangular shape. .

The AT-cut crystal oscillator 26 is fixedly supported at the tips of the first and second support pieces 24 and 25 via an adhesive or the like.
It has a main electrode 2728 and extraction electrodes 29 and 30 on its surface, similar to those described above.

The extraction electrode 2930 is connected to an electrode terminal (not shown) provided on the case via a lead wire 3132.

By integrally forming the first support piece 24 and the second support piece 25 in this manner, the work of attaching the AT-cut crystal resonator to the support piece becomes easy and the work process can be simplified.

Furthermore, although the first and second support pieces 24 and 25 are made of an insulating material, it is possible to support the AT-cut crystal oscillator softly and without increasing vibration, as in the two embodiments described above. This method does not damage the AT-cut crystal resonator.

In addition, in FIGS. 2 to 3 of the above embodiment, the explanation was given using an example in which the first and second support pieces were flat plates, but the first and second support pieces were arranged in the longitudinal direction of the support pieces. A similar effect can be produced even when the support piece is changed to an elliptical support piece (not shown) in which the longitudinal dimension and the lateral dimension of the cross section perpendicular to are different.

As mentioned above, the support piece with a rectangular or elliptical cross-sectional shape is inexpensive to manufacture, suitable for mass production, and can be easily manufactured using a press or roller. It is also easy to form the whole into a tapered shape.

Although the present invention has been described in detail with reference to the illustrated embodiments, the present invention is not limited to the illustrated embodiments. For example, the first and second support pieces may have a triangular shape, While it can be formed into shapes other than rectangles,
Furthermore, as shown in FIG. 1, the present invention can also be applied to the case where both sides of a thickness-shear crystal resonator are supported oppositely. The structure may be such that the second support piece is used as the other support piece.

Further, although an AT-cut resonator is used as the thickness-shear crystal resonator, various changes and improvements can be made, such as using a resonator made of tantalum oxide, niobate, etc. .

As described above, in the support structure of the thickness-shear crystal resonator according to the present invention, the longitudinal dimension and the lateral dimension in the cross section perpendicular to the longitudinal direction are different, and the directions of the long portions of the above dimensions are approximately perpendicular to each other. At least a pair of support pieces are arranged so as to have a relationship with each other and have different spring constants in the vertical and lateral directions, and one end of the thickness-shear crystal resonator is fixedly supported at the tips of the pair of support pieces. Because of its structure, even when external forces such as vibration or impact are applied in any direction, such as vertically or horizontally, the thickness-shear oscillator is supported softly by the tip of the support piece, and one of the support pieces It is possible to strongly support the thickness-shear crystal resonator by thickening it (it is possible to buffer the above external force without shaking the thickness-shear crystal resonator, and there is no risk of the thickness-shear crystal resonator colliding with the inner wall of the case etc. and being damaged). (Furthermore, by forming the pair of supporting pieces from a conductive material, the thickness-shear crystal resonator is supported by the supporting pieces, and electricity is supplied to the main electrode formed on the thickness-shear crystal resonator via the lead electrode. It has great practical effects, such as being able to connect directly, serving as an electrode terminal, and reducing manufacturing costs.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing a conventional support structure for supporting an AT-cut crystal resonator as a thickness-shear crystal resonator, and Fig. 2 shows an embodiment of the support structure for a thickness-shear crystal resonator according to the present invention. FIG. 3 is a perspective view showing another embodiment of the support structure for a shear crystal resonator having the same thickness. 1526 is an AT cut crystal oscillator as a crystal oscillator.
414 is a case, 6727 28 is a main electrode, 8 9 29 30 is an extraction electrode, 1
2.24 is the first support piece, 13.25 is the second support piece,
12a is a plane part of the first support piece, 13a is a plane part of the second support piece, and 3132 is a lead wire.

Claims (1)

[Claims] 1. An AT-cut crystal resonator having an elongated shape as a whole; first and second support pieces provided at one end of the AT-cut crystal resonator, integrally formed with each other, and arranged orthogonally;
A tapered tip formed at one end of the first and second support pieces, a pair of main electrodes formed on the surface of the AT-cut crystal resonator, and a pair of main electrodes provided on each main electrode of the AT-cut crystal 1. A support structure for a thickness shear crystal resonator, comprising an extraction electrode formed on the surface of the vibrator, and a lead wire connected to each of the row extraction electrodes.