JPS6145619A - Piezoelectric vibrator - Google Patents

Abstract

PURPOSE:To improve shock and vibration resistance by tilting a support or a lead wire to a step end face to ensure sufficient bonding area and amount of solder in fixing a crystal oscillating chip with a connection electrode. CONSTITUTION:A rod or plate shape lead wire 18 penetrated through a stem 25 and provided in parallel with the face of the crystal oscillating chip 13 or rod or plate shape support 19 fixed to the lead 18 is tilted to the end face of the stem 25. Then sufficient bonding area and amount of solder are ensured in fixing the crystal oscillating chip 13 to the connection electrodes 15, 15'. Thus, 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.

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

In this way, conventional methods use conductive adhesives, which causes problems with the vibration and impact resistance of the piezoelectric vibrator due to the inherent fragility of conductive adhesives, and the process is also complicated. This method has the drawbacks of poor workability and increased 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 bonding area is small and there are fewer solders, 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 ensure a sufficient area when attaching a nozzle by using a support structure in which wide rod-shaped or plate-shaped lead wires or support wires are inclined. The object of the present invention is to provide a piezoelectric vibrator which has improved vibration resistance and impact resistance, and which can reduce the number of 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 that is electrically connected to the excitation electrode and formed toward the periphery of the piezoelectric plate, and one plate surface facing the piezoelectric plate. A rod-shaped or plate-shaped lead that penetrates the hermetic terminal (stem) and is provided parallel to the piezoelectric plate surface, and is directly fixed to the connecting electrode with solder or the like. The wire or the rod-shaped or plate-shaped support portion fixed to the lead wire is slanted with respect to the end surface of the hermetic terminal (stem).

〔Example〕

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

2(A) and 2(B) are a front view and a plan view showing an embodiment of the circular thickness-stretching crystal resonator of the present invention, in which an excitation electrode 14 is placed on the plane of the crystal oscillation piece 13, and the excitation electrode 14 is placed on the plane of the crystal oscillation piece 13; A connection electrode 15 electrically connected to the electrode 14, a fixing electrode 16 formed at the end of the connection electrode 15, and a crystal from the end of the connection electrode 15' of the other excitation electrode 14' facing the excitation electrode 14. The fixed electrode 16' is electrically connected through the side surface of the oscillating piece 13.
is formed. Further, an end portion 20 of the fixing electrode 16 that is electrically connected to the connection electrode 15 is also formed on the excitation electrode 14' side.

Here, the support part 19 fixed to the lead wire 18 by welding or the like is inclined with respect to the stem i5, and is inclined and bent in the opposite direction along the outer periphery of the crystal oscillation piece 13 near the center of the fixed electrode 16. By ensuring the length of solder bonding and expanding the bonding area, adhesive strength can be ensured. In this example, the lead wire 18
When the support s19 is fixed by welding or the like, a certain force is applied;
, lead jl that penetrates the stem! Even if 1B is extended and directly bent and tilted, the same effect can be obtained.

Although a crystal oscillator is used as an example, other piezoelectric oscillators made of ceramics, Litaol, etc. also have the same effect.

〔effect〕

As described above, according to the present invention, as a method for holding a piezoelectric vibrator, by slanting the supporting part or the lead wire with respect to the end face of the stem, a sufficient adhesive area can be obtained for fixing the crystal oscillator piece to the connecting electrode. And since the amount of solder can be secured, vibration resistance 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 CB) 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 ... Stem and above

Claims (1)

[Claims] In a piezoelectric vibrator, excitation electrodes are formed on the front and back surfaces of the piezoelectric plate, and connecting electrodes are formed toward the periphery of the piezoelectric plate in conduction with the excitation electrode. The excitation electrode, the connection electrode, and an end of the connection electrode on one plate surface facing each other are formed, and the connection electrode and a rod-shaped or plate penetrating the hermetic terminal and provided parallel to the piezoelectric plate surface. A lead wire 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 inclined with respect to the end surface of the hermetic terminal. piezoelectric vibrator.