JPS62152209A - Support device for piezoelectric vibrator chip - Google Patents

Abstract

PURPOSE:To prevent the occurrence of cracks in a piezoelectric vibrator by adopting a line contact in a way that a slit in contact with a circumference of the piezoelectric vibrator chip is formed as a circular-arc having the same radius as the said circumference, or multi-point contact in a way of stepwise forming or adopting line contact with a circle. CONSTITUTION:The slits 12, 12' supporting the crystal resonator are formed along the lengthwise direction of a leg 13 folded incorporatedly at the lower side center of a support plate 11. The crystal vibrator chip 14 is clipped for support horizontally between the slits 12, 12' of the two support plates 11, 11'. The part of the slits 22, 22' in contact with the circumference of the crystal vibrator chip 24 is cut the same curved face as the circumference of the crystal resonator and the line contact with the circumference of the crystal vibrator chip 24, or the stepwise multi-point contact or the line contact with a circle is adopted to scatter a force exerted to the slits 22, 22' and the circumference of the crystal vibrator chip 24.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a support device for a piezoelectric vibrating piece.

[Summary of the invention]

In the present invention, in a support device for a vibrating piece, the part of the slit that comes into contact with the circumference of the pressure-reducing piece is made into an arc shape having the same radius as the circumference, and the part of the slit is made into a line contact, a step shape, or a step shape. By using a point contact or a circular and straight contact structure, the force applied to the area where the slit contacts the circumference of the piezoelectric vibrating piece is dispersed, thereby preventing the piezoelectric vibrating piece from cracking.

[Conventional technology]

Figure 7 shows the conventional pressure 'll! The supporting device for the movement piece will be explained as an example using a disk-shaped AT-cut crystal fine movement piece. Conventionally, as a device for supporting a crystal vibrating piece in the thickness periphery mode, such as an AT-cut crystal vibrating piece, the mounting plate is installed on two holding plates 1 and 1' that stand parallel to each other on the base. A crystal vibrating piece 4 is vertically held between the slits 2 and 2'.

[Problem that the invention seeks to solve]

However, in the conventional support device for a crystal vibrating piece, the portion of the slit that contacts the circumference of the crystal vibrating piece is at a right angle. In other words, the circumference of the crystal vibrating piece and the slit contact each other at one point, so the force is concentrated, and if the crystal vibrating piece is subjected to vibration or impact when attaching it to a support device or when it is used as a product, it will not make contact. Cracks occur in the parts where the oscillation occurs, and from a manufacturing perspective, there is a problem in that the yield is reduced, and the reliability of the product is reduced due to abnormal oscillations, oscillation stops, etc.

Therefore, in order to solve these conventional problems, it is an object of the present invention to provide a support device in which a piezoelectric vibrating piece does not cause cracks.

[Means for solving problems]

In order to solve the above-mentioned problems, the piezoelectric vibrating piece support device of the present invention has a piezoelectric vibrating piece supporting device having a slit, and the part that contacts the circumference of the pressure & moving piece has the same radius as the circumference. It is characterized in that it has an arc shape to form a line contact, a stepped shape to form a multi-point contact, or a contact structure of a circle and a straight line.

[For production]

The support device for the piezoelectric vibrating piece configured as described above has a point in which the slit contacts the circumference of the piezoelectric vibrating piece in an arc shape with the same radius as the circumference, so as to make a line contact, or in a step-like manner with multiple points. The part where the circumference of the piezoelectric vibrating piece and the slit come into contact by making contact or by making contact structure of a circle and a straight line, or by making contact between the piezoelectric vibrating piece and the slit at multiple points or by a line. It is possible to disperse the force applied to the piezoelectric vibrating piece and prevent cracks from occurring in the piezoelectric vibrating piece.

〔Example〕

Below are examples of the piezoelectric vibrating piece support device of the present invention. An example in which a disk-shaped AT-cut crystal vibrating piece is used as a vibrating piece will be explained based on the drawings.

FIG. 4 is a perspective view of the piezoelectric vibrating piece support device. It has a T-shape and is composed of a flat holding plate 11 positioned vertically, and a leg plate 13 integrally bent at the center of the lower side of the holding plate. Slabs 12 and 12' for supporting the crystal vibrating piece are installed along the longitudinal direction on the holding plate 11° and 11°.

As shown in FIG. 5, the support device configured as described above has the leg plates 13, 13' fixed to the board by soldering in opposing positions, and these two holding plates 11t11' (7).
C! 7) 12.12'it [Horizontally support the crystal vibrating piece 14.

As shown in FIG. 1, the sleeves 22 and 22° are curved so that the portion where the circumference of the crystal vibrating piece 24 and the sleeve 1-22, 22' contact each other is curved to the same curved surface as the circumference of the crystal vibrating piece, By contacting the circumference of the crystal vibrating piece 24 with a line, the slit 2
2.22' and the circumferential portion of the crystal vibrating piece 240 can be dispersed, making it difficult for cracks to occur in the crystal vibrating piece 24. As shown in FIG. 2, the slit 32° 321 and the crystal vibrating piece 340 are formed by cutting the four contact points that contact the slit 52° 321 and the circumference of the crystal vibrating piece 34 in a step-like manner.
By doubling the number of contact points between the circumferences, the force is dispersed and the crystal fine movement piece 34 is less likely to crack and warp.

Further, in this embodiment, the two points are in contact with each other, but the same effect can be obtained by increasing the number of steps of the stairs to have multiple points.

Next, a sixth embodiment of the pressure-dynamic vibrating reed support device of the present invention will be described. As shown in FIG. 3, by cutting the slits 42° 42' and the four contact points that contact the circumference of the crystal vibrating piece 44 in a straight line, a slit that comes into contact with the circumference of the crystal vibrating piece 4)
When the part 2.21 is at a right angle, the slit 42, 42 of this embodiment contacts the circumference of the crystal vibrating piece 440.
If two contact points are cut in a straight line, it is a sleeve) 42.4
The contact area between 2' and the crystal vibrating piece 4.4 becomes wider. Therefore, the force applied to the sleeves 42, 42'' and the circumferential portion of the crystal vibrating piece 440 can be dispersed.

Further, in this embodiment, a support device used in an oscillator is shown, but as shown in FIG. 6, pressure 1! It can also be applied as a support device for a single vibrating element product, and similar effects can be obtained.

〔Effect of the invention〕

The pressure of the invention! As explained above, the support device for the vibrator can be configured such that the circumference of the piezoelectric vibrating piece is connected to the circumference of the piezoelectric vibrating piece, and the portion of the slit that melts is made into an arc shape with the same radius as the circumference, or in a step-like shape. A point contact or a circular and straight contact structure has the effect of preventing the generation of cracks in the piezoelectric vibrator. Furthermore, by preventing cracks during manufacturing, manufacturing becomes easier, and by preventing cracks due to vibration, impact, etc. during use, vibration resistance and impact resistance are improved.

[Brief explanation of drawings]

FIG. 1, FIG. 2, and FIG. 3 are plan views of a portion where a piezoelectric vibrating piece and a slit are in contact with each other according to the present invention. FIG. 4 is a perspective view of the support device. FIG. 5 is a plan view showing a combined state of the support device and the piezoelectric vibrating piece. FIG. 6 is a vertical cross-sectional view of a single crystal vibrating piece. FIG. 7 is a plan view showing a combination of a conventional support device and a piezoelectric vibrating piece. 21.21'...Holding plate 22.22'...Slit 24...Piezoelectric vibrating piece or more

Claims (1)

[Claims] In a support device for a piezoelectric vibrating piece having a slit, the contact portion of the slit with the circumference of the piezoelectric vibrating piece may be made into an arc shape with the same radius as the circumference to form a line contact, or may be made into a stepped form to form a multi-point contact. 1. A support device for a piezoelectric vibrating piece, characterized by having a contact structure of a circle and a straight line.