JPS6129206A - Piezoelectric vibrator - Google Patents

Abstract

PURPOSE:To improve vibration resistance and shock resistance by making a rodlike or platelike lead wire wide and securing sufficient area for soldering. CONSTITUTION:A support 19 fixed to an inner lead 18 by welding etc. is fixed to fixing electrodes 16, 16' through a solder 17. The size in horizontal direction (width: w) of the support 19 is made larger than the size in vertical direction (thickness: t) to a crystal oscillator 13, and thereby the area for soldering can be secured sufficiently. By such constitution, the vibration resistance and shock resistance can be improved. The same effect can be obtained by making fixing part to the vibrator wide in width.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to piezoelectricity and vibrators.

[Prior art]

In the conventional piezoelectric vibrator, one end of the holding member 4 is welded to the inner lead 5 of the stem 6, and the opposite end of the holding member 4 is welded to the inner lead 5 of the stem 6. The other tip was formed into a coil shape and held on both sides of the crystal oscillation piece 10, and a conductive adhesive 5 or the like was applied to this holding portion.

In this way, in conventional examples, conductive adhesives are used, which causes problems with the vibration and shock resistance of the piezoelectric vibrator due to the inherent fragility of conductive adhesives, and the process is complicated and difficult to work with. This method had the drawbacks of poor performance and increased man-hours. As a solution to this problem, soldering is the preferred method of attachment, which has excellent vibration and shock resistance and can reduce man-hours. Sufficient adhesive strength could not be obtained.

〔the purpose〕

The present invention is intended to solve the above problems, and its purpose is to increase the vibration and shock resistance by widening the rod-shaped and plate-shaped lead wires and ensuring a sufficient area for soldering. The aim is to improve this and also reduce the number of man-hours.

〔overview〕

In the piezoelectric vibrator of the present invention, excitation electrodes are formed on the front and back surfaces of a piezoelectric plate, electrically conductive with the excitation electrodes, and connected to a connection electrode around the piezoelectric plate, and one excitation i-electrode facing the piezoelectric plate. The ends of the connecting electrodes that conduct electricity are formed), and are directly fixed to the connecting electrodes with a solder or the like. Horizontal direction (width direction) with respect to the excitation electrode of the piezoelectric plate of the plate-shaped lead wire or the rod-shaped or plate-shaped support fixed to the lead wire.
The structure is characterized in that the dimension is the same as or larger than the dimension in the vertical direction (thickness).

〔Example〕

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

FIGS. 2(A) and 2(B) are front and plan views showing an embodiment of the circular thick rainbow crystal resonator of the present invention, in which the excitation electrode 14 is placed on the main surface of the crystal oscillation piece 15, and Crystal oscillation occurs from the connection side 15 that conducts with the excitation electrode 14, the fixing side 16 formed at the end of the connection electrode 15, and the end of the connection electrode 15' of the other excitation electrode 14' facing the excitation electrode 14. A fixing electrode 16' is formed on the side surface of the piece 15 and is electrically conductive. Further, a fixing electrode 20 that is electrically connected to the connection electrode 15 is also formed on the excitation electrode 14' side.

Here, the support 19 fixed to the inner lead 18 by welding or the like is connected to the fixing electrodes 16, 16' via solder 17.
Fixed. As shown in FIG. 2B, the report 19 has a horizontal dimension (width: W) larger than the vertical dimension (thickness: t) with respect to the crystal oscillator piece 13, and has a sufficient area for soldering. This means that it can be ensured. Also, Figure 3 (A
), (As shown in 1, the same effect can be obtained even if the vicinity of the fixed portion with the piezoelectric plate is made wide.

Further, in this example, a fixing electrode is formed at the end of the connecting electrode, but if sufficient fixation is achieved, the fixing electrode is not necessary and the connecting electrode is sufficient.

Although a crystal oscillator is given as an example of a rigid structure, other piezoelectric oscillators such as ceramics and LLt103 have the same effect.

〔effect〕

As described above, according to the present invention, as a method for holding a piezoelectric vibrator, a support and a fixing electrode are placed on the same main surface.・・・
Since the adhesive is bonded, work efficiency is improved and the number of man-hours is reduced, and sufficient bonding area can be secured, resulting in improved vibration and impact resistance.

[Brief explanation of drawings]

FIG. 1 is an old side view showing a conventional example. Figures 2 (Δ) and (B) show examples of actual rights of the present invention;
A) is a front view, and CB) is a plan view. FIGS. 3(A) and 3(CB) are plan views showing other practical examples of the present invention. 13...Crystal @ Chopstick 14.14'...Excitation electrode 15, 15'...Connection electrode 17...Solder 18...Inner lead 19...Support 25...Stem or above

Claims (1)

[Claims] An excitation electrode formed on the front and back surfaces of the piezoelectric plate, a connection electrode that is electrically connected to the excitation electrode and formed toward the periphery of the piezoelectric plate, and an end portion of the connection electrode that is electrically connected to the excitation electrode. A rod-shaped or plate-shaped lead wire or a rod-shaped or plate-shaped support portion fixed to the lead wire is directly fixed to the connection electrode, and the lead wire or support portion is connected to the piezoelectric plate. 1. A piezoelectric vibrator having a portion in which the dimension in the horizontal direction (width direction) is equal to or larger than the dimension in the vertical direction (thickness) with respect to the excitation electrode.