JPH0224267Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a crystal resonator used as a component for a quartz watch.

In the conventional crystal resonator, as shown in FIGS. 6 and 7, a pair of lead wires 12, 12 are inserted into a section-shaped stem 11, which is sealed with glass to the stem 11, and this glass-sealed portion 13 A pair of lead wires 1 protruding upward
A crystal piece 14 is inserted and held between the tips of the crystal pieces 2 and 12, and the lead wires 12 and 12 are soldered to electrode plates 14a and 14b of the crystal piece.

However, in such a conventional crystal resonator, the attachment position of the crystal piece 14 to the lead wire 12 is not constant, which tends to cause variations in the product, and is difficult to adapt to continuous automated work. Furthermore, the side surface of the lead wire 12 having a circular cross section and the flat electrode plate 14
Since this makes contact with a, there is a problem that this results in unstable line contact, resulting in positional deviation during assembly work or easy falling off.

The present invention was developed by focusing on the above-mentioned problems of conventional crystal resonators. By fitting the parts and fixing them by soldering or adhesive, it is possible to specify the installation position of the crystal piece and prevent it from falling off or shifting, making it suitable for continuous automation of assembly. The aim is to solve the above-mentioned conventional problems.

Embodiments of the present invention will be described below with reference to the figures. A pair of lead wires 2, 2 each having a circular cross section are inserted into the annular shell 1 in parallel with a space therebetween.
It is fixed to the shell 1 by glass sealing.

Inside the tips of the lead wires 2, 2 protruding from the glass sealing part 3, vertical notches 2a are formed at opposing positions, respectively, at right angles to the plane. In the illustrated embodiment, the notch 2a is formed by recessing approximately four halves of the circular cross section of the lead wire 2 by press molding. The notch 2a of the lead wire can be formed, for example, as shown in FIG. That is,
After glass-sealing the lead wires 2 and 2 to the shell 1,
The tip is inserted into the recesses a, a of the lower mold A having a semicircular cross section, and press-molded with a punch P from above. The upper half of the tip of the lead wire 2 protrudes from the recess a of the lower mold A, and the punch P compresses the inner half of the protruding upper half at right angles.

The corner of the crystal piece 4 is connected to the notch 2 of the lead wires 2, 2.
a, 2a and is fixed thereto. The crystal piece 4 is an electrode plate 4 made of a vapor-deposited metal thin film.
a, 4b, which are brought into contact with the respective lead wires 2, 2 and connected by soldering or conductive adhesive.

As described above, in the present invention, a pair of lead wires 2, 2 having a circular cross section are inserted into the annular shell 1 in parallel and sealed to the shell 1 with glass, and a pair of lead wires protruding from the glass sealed portion In a crystal resonator in which the tips of the lead wires 2, 2 are connected to the pair of electrode plates 4a, 4b of the crystal piece 4, approximately 1/1/2 of the cross section is placed inside the tips of the pair of lead wires 2, 2. 4 A circular notch 2a is formed, one of the vertical side surfaces of which are at 90 degrees to each other faces the direction in which the lead wires 2, 2 are arranged, and the other face faces the direction in which the lead wires 2, 2 are arranged.
The crystal element 4 is oriented in a direction perpendicular to the direction in which the crystal blanks 4 are lined up, and is configured so that the crystal piece 4 can be attached to the notch 2a from the side. 2a can be easily formed by pressing from the side, and the crystal pieces 4 can be fitted and fixed into the notches 2a from the side, making positioning extremely easy.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a side view, Fig. 3 is a plan view, Fig. 4 is a perspective view, and Fig. 5 is a front view of an embodiment of the present invention.
The figure is a front view showing the molded state, FIG. 6 is a front view of a conventional example, and FIG. 7 is a plan view thereof. 1...Ciel, 2...Lead wire, 2a...Notch, 3...Glass sealing part, 4...Crystal piece, 4a,
4b...electrode plate.

Claims (1)

[Scope of utility model registration request] A pair of lead wires with a circular cross section are passed through the annular shell in parallel and sealed to the shell with glass, and the tips of the pair of lead wires protruding from the glass seal are attached to a pair of electrode plates of the crystal piece. In each of the connected crystal oscillators, a notch having an approximately 1/4 circular cross section is formed inside the tip of the pair of lead wires,
One of the vertical sides of this cutout, which forms a 90-degree angle with each other, faces the direction in which the lead wires are arranged, and the other faces in a direction perpendicular to the direction in which the lead wires are arranged, and the crystal piece is inserted into the notch from the side. A crystal resonator characterized by being fitted and fixed.