JP2001016058A - Assembling jig for crystal resonator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the principal plane of a quarts crystal and an excitation electrode from being damaged by respectively providing a crystal piece arranging jig and an airtight terminal fixing jig, while mutually positioning and fixing mechanism and preventing the crystal piece arranging jig from being brought into contact with the part other than the outer edge of a crystal piece. SOLUTION: This jig is composed of a crystal piece arranging jig for positioning/arranging plural crystal pieces 1 on which electrodes are formed and an airtight fixing jig for positioning/holding plural airtight terminals. The crystal piece arranging jig and the airtight terminal fixing jig mutually have the positioning and fixing mechanisms, and the crystal piece arranging jig is constituted where it is not brought into contact with the part other than the outer edge of the crystal piece 1. Namely, the crystal piece 1 and the crystal piece arranging jig (the passage of crystal piece) are not brought into contact with the outer edge part of the crystal piece 1. Since the principal plane of the quartz crystal, where the characteristic of a crystal resonator is liable to change and the exciting electrode are not brought into contact with the crystal piece arranging jig, occurrence of flaws can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crystal oscillator assembling jig.

[0002]

2. Description of the Related Art Quartz resonators are used in many fields and are manufactured in large quantities. Manufacturing is becoming more automated and offered at lower cost, contributing to many industries. FIG. 1 is a perspective view of a quartz resonator according to the present invention during manufacture. Rectangular AT
An excitation electrode 2 and an extraction electrode 3 are formed on both sides of a cut crystal blank 1 (hereinafter simply referred to as a crystal blank). The hermetic terminal 7 includes two lead terminals 4 and 4 ′ and a metal ring 5, and an insulating member 6 that positions and fixes the two lead terminals 4 and 4 ′ and the metal ring 5. The crystal blank 1 is fixed to the two inner leads 4a and 4'a of the hermetic terminal 7 with an adhesive (not shown). Inner leads 4a, 4'a and extraction electrode 3
Are electrically connected by a conductive adhesive (including solder).

The crystal blank 1 has a rectangular flat plate shape, but various shapes have been devised to prevent spurious.
FIG. 2 shows two typical shapes. The coordinates in the figure indicate the cutting direction of the crystal blank. (A) is processed into a biconvex, and (B) is processed into a bevel shape.
(C) shows an electrode formed in the same manner as in FIG.

FIG. 3 is a perspective view of a part of a crystal oscillator assembling jig for assembling a crystal piece and an airtight terminal. Reference numeral 8 denotes a crystal piece arrangement jig, and reference numeral 9 denotes an airtight terminal fixing jig. A plurality of windows 8a for arranging the crystal blanks 1 are provided in the crystal blank arranging jig 8, and guide pins (not shown) for positioning and fixing with the airtight terminal fixing jig 9 are fixed. A plurality of hermetic terminals 7 corresponding to the crystal piece arranging jig 8 are set in the airtight terminal fixing jig 9, and two guide holes (not shown) for inserting guide pins of the crystal piece arranging jig are provided. is there.

When the crystal blank 1 is set in a horizontal state on the crystal blank arranging jig 8 and the crystal oscillator assembly jig is set up vertically as shown in FIG. It slides down to the top of 7 and is set.

[0006]

The crystal blank 1 slides down from the state shown in FIG. 3 to the upper surface of the airtight terminal 7, and the airtight terminal 7 and the crystal blank 1 are brought into the state shown in FIG. At this time, most of the crystal blank 1 is located in the crystal blank alignment jig 8, and thereafter, the non-conductive adhesive and / or the conductive adhesive are cured.
Until the curing is completed, the device is set in the crystal resonator assembly jig. Therefore, the following problems occur from the setting to the completion of the curing.

The upper and lower sides of the passage of the crystal blank 1 of the crystal blank arranging jig are flat plates, and the surface (main surface) of the crystal blank 1 on which the electrodes are formed.
When the crystal blank 1 falls down the passage, the excitation electrode 2 or the main surface of the crystal blank 1 may be damaged. FIG.
FIG. 4 is a sectional view taken along line XX of FIG. If the main surface of the crystal blank 1 or the excitation electrode 2 is damaged, the characteristics of the crystal resonator change (degrade), but it is difficult to find out after completion. When the crystal blank has a convex shape or a bevel shape, a convex portion is present, so that the crystal piece is particularly likely to be partially contacted and easily damaged. Since the adhesive is thermosetting, the shrinkage during curing causes torsional rotation about the longitudinal direction of the crystal blank 1 as a rotation axis, and the main surface of the crystal blank 1 (usually the excitation electrode portion) is placed on the upper plate B. Alternatively, a force pressing against the lower plate A works. In the case where the crystal blank 1 is thin, when the crystal blank arrangement jig 8 and the airtight terminal fixing jig 9 are removed, a stress may be applied to the crystal blank 1 such that the crystal blank 1 is broken. In this case as well, when the crystal blank 1 is in a convex shape or a bevel shape, it is particularly similar to that the crystal piece 1 is likely to be partially in contact.

[0008]

At least a jig for arranging a plurality of crystal blanks on which electrodes are formed and an airtight terminal fixing jig for positioning and holding a plurality of airtight terminals are provided. The crystal piece arranging jig and the airtight terminal fixing jig have a mechanism for positioning and fixing each other, and the crystal piece arranging jig has a structure that does not come into contact with portions other than the outer edge portion of the crystal piece.

[0009]

FIG. 5, FIG. 6, and FIG. 7 are cross-sectional views similar to FIG. 4 of a crystal piece arranging jig of a crystal resonator assembly jig according to an embodiment of the present invention. The shape of the passage is changed. FIG. 5 shows a shape in which the outer edge of the crystal blank is guided, FIG. 6 shows a concave surface on the entire surface corresponding to the main surface of the crystal blank, and FIG. The shape is such that the entire surface corresponding to the main surface of the crystal blank is concave. If the curvature of the concave surface is reduced, the concept of the present invention can be applied to a convex shape or a bevel shape.

The crystal blank 1 and the crystal blank arranging jig (the passage of the crystal blank) have a structure that does not come into contact with anything other than the outer edge of the crystal blank 1. Since the main surface of the crystal and the excitation electrode, in which the characteristics of the crystal unit are liable to change, do not contact the jig for arranging the crystal pieces, it is possible to prevent the occurrence of scratches.

[0011]

According to the present invention, since the main surface of the quartz crystal and the excitation electrode, in which the characteristics of the quartz oscillator easily change, do not come into contact with the jig for arranging the quartz pieces, it is possible to prevent the occurrence of scratches. Deterioration of characteristics due to flaws is difficult to find because of the change with time, but it was possible to prevent the occurrence of such difficult-to-find defects.

The effect is particularly large in the case of a crystal blank having a convex portion such as a convex shape or a bevel shape.

[Brief description of the drawings]

FIG. 1 is a perspective view of a quartz resonator according to the present invention during manufacture.

Fig. 2 Shape of crystal blank

FIG. 3 is a perspective view of a part of a crystal resonator assembly jig for assembling a crystal piece and an airtight terminal.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is a cross-sectional view of a crystal piece arranging jig of a crystal resonator assembling jig according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view of a crystal piece arranging jig of the crystal oscillator assembling jig according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view of a crystal piece arranging jig of a crystal oscillator assembling jig according to an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rectangular AT-cut crystal blank 2 excitation electrode 3 extraction electrode 4 lead terminal 4 a inner lead 4 ′ lead terminal 4 ′ a inner lead 5 metal ring 6 insulating member 7 airtight terminal 8 crystal blank arranging jig 8 a Window 9 Airtight terminal fixing jig

Claims (2)

[Claims] 1. A crystal piece arrangement jig for positioning and arranging a plurality of crystal pieces formed with electrodes and an airtight terminal fixing jig for positioning and holding a plurality of airtight terminals. A jig for assembling a crystal unit, characterized in that the jig and the airtight terminal fixing jig have a mechanism for positioning and fixing each other, and the jig for arranging quartz pieces does not come into contact with portions other than the outer edges of the quartz pieces. 2. The crystal resonator assembling jig according to claim 1, wherein the crystal blank to be assembled is a rectangular AT-cut crystal blank and has a bevel shape or a convex shape.