JPS6145618A - Piezoelectric vibrator - Google Patents

Abstract

PURPOSE:To ensure sufficient contact area and an amount of solder and to improve the shock and vibration resistance by forming a lead wire or a support wire in circular arc form along the peripheral of a piezoelectric oscillator chip to fix it directly. CONSTITUTION:A rod or plate shape lead wire 18 provided in parallel with a face of a piezoelectric oscillating chip 13 or a rod or plate shape support 19 fixed to the lead wire 18 is made curved in a circular arc form along the peripheral of a connection electrode 15 or the piezoelectric oscillating chip 13. Then the bonding length of fixing electrodes 16, 16' by solder is ensured and the contact area is spread. Thus, the shock and vibration resistance is improved.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a holding structure for a piezoelectric vibrator.

[Prior art]

In conventional piezoelectric vibrators, for example, the thickness-stretching vibrator on a disc shown in Fig. 1, a hermetic terminal (hereinafter referred to as stem) is used.
One end of the holding member 4 is welded to the inner lead 5 of 6, and the other end of the holding member 4 opposite to the welded part is formed into a coil shape to hold both sides of the crystal oscillation piece 1, and conductive adhesive is applied to this holding part. 3 grade was applied.

As described above, in the conventional example, since a conductive adhesive or the like is used, the problem arises from the fragility peculiar to the conductive adhesive. The piezoelectric vibrator has problems with its vibration resistance and shock resistance, and also has the disadvantage that the process is complicated, has poor workability, and increases the number of man-hours. As a solution, we have developed a product with excellent vibration and shock resistance.
Soldering is used to hold the stem, which can reduce the number of man-hours, but if the lead wires perpendicular to the stem are soldered directly, the solder area is small and the amount of solder is small, so sufficient bonding strength can be obtained. I couldn't.

〔the purpose〕

The present invention solves the above-mentioned problems, and its purpose is to provide a support structure for a piezoelectric vibrator and a rod-shaped or plate-shaped lead wire or support wire by securing a sufficient area for soldering. The objective is to improve vibration and impact resistance and reduce man-hours.

〔overview〕

The piezoelectric vibrator of the present invention includes an excitation electrode on the front and back surfaces of a piezoelectric plate, a connecting electrode electrically connected to the excitation electrode toward the periphery of the piezoelectric plate, and one excitation electrode facing the piezoelectric The end of the connecting electrode is formed to conduct through the side surface of the piezoelectric plate, and the hermetic terminal (stem), which is directly fixed to the connecting electrode with solder etc., is passed through and parallel to the surface of the piezoelectric plate. It is characterized in that a rod-shaped or plate-shaped lead wire or a rod-shaped or plate-shaped support portion fixed to the lead wire is curved in an arc shape along the outer periphery of the connection electrode or the piezoelectric plate.

〔Example〕

Hereinafter, the present invention will be described in detail based on examples.

z1M(A)*(B) is a front view and a plan view showing an embodiment of the circular thickness-stretching crystal resonator of the present invention, in which the excitation electrode 14 is placed on the plane of the crystal oscillation piece 15, and the excitation electrode Crystal oscillation occurs from the connecting electrode 15 which is electrically connected to the connecting electrode 14, the fixing electrode 16 formed at the end of the connecting electrode 15, and the end of the connecting electrode 15' of the other excitation electrode 14' facing the excitation electrode 14. A fixed electrode 16' is formed through the side surface of the piece 15 and is electrically conductive. Further, an end portion 20 of the fixing electrode 16 is also formed on the side of the excitation electrode 14', which is electrically connected to the connection electrode 15.

Here, the support part 19 fixed to the lead l1lF118 by welding or the like has an arc shape along the outer periphery of the crystal oscillation piece 15, and secures the length of solder bonding with the fixed electrodes 16 and 16'. By expanding the adhesive area, adhesive strength can be ensured. In this example, lead H
Although the structure in which the support part 19 is fixed to the stem 10 by welding or the like is mentioned, the same effect can be obtained even if the lead wire passing through the stem is directly bent and curved.

Although a crystal oscillator is used as an example, other piezoelectric oscillators made of ceramics, ceramics, etc. can also have similar effects.

〔effect〕

As described above, according to the present invention, as a method for holding a piezoelectric vibrator, a support structure in which lead wires or support wires are formed in an arc shape and directly fixed along the outer periphery of a piezoelectric oscillation piece is used, so that a sufficient bonding area and Since the lid can be secured, vibration and impact resistance are also improved.

[Brief explanation of drawings]

FIG. 1 is a front view showing a conventional example. FIGS. 2(A) and 2(B) show an embodiment of the present invention, and FIG.
A) is a front view, and (B) is a plan view. 13... Crystal oscillation piece 14, 14'... Excitation electrode 15, 15'... Connection electrode 16, 16', 20... Fixed electrode 17 ...
... Solder 18 ... Lead wire 19 ... Support part 25 ... Above the stem

Claims (1)

[Claims] Excitation electrodes are formed on the front and back surfaces of the piezoelectric plate, and connection electrodes are formed toward the periphery of the piezoelectric plate. The excitation electrode and the connection electrode are formed on one of the plate surfaces, and the end of the connection electrode on the opposing plate surface, and the connection electrode and the hermetic terminal are passed through and connected to the piezoelectric plate surface. A rod-shaped or plate-shaped lead wire provided in parallel or a rod-shaped or plate-shaped support portion fixed to the lead wire is directly fixed, and the lead wire or support portion is connected to the connecting electrode or the piezoelectric plate. A piezoelectric vibrator characterized by being curved in an arc shape along the outer periphery of the piezoelectric vibrator.