JPS5843288Y2 - Atsudenshindoushi - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a vibrator using piezoelectric material.

The present invention relates to a piezoelectric vibrator in which a piezoelectric vibrating piece is sandwiched between conductive materials having a simple structure and bonded to the outer periphery of the conductive material via an insulating material.

The purpose of the present invention is to provide a compact and impact-resistant piezoelectric vibrator for use in wristwatches and the like.

The structure of a conventional piezoelectric vibrator is shown in FIG.

In FIG. 1, 1 is a piezoelectric vibrating piece.

Reference numeral 23 denotes thin film electrodes formed on both surfaces of this piezoelectric vibrating piece, and a portion of this thin film electrode is drawn out to the periphery in opposite directions on the front and back sides, respectively.

Further, this piezoelectric vibrating piece is held by metal wires 5 and 6 at both ends from which the thin film electrodes are drawn out.

At the same time, the metal wires 5 and 6 are fixed to the substrate 7, and are pulled out of the case as they are to serve as electrode terminals.

A case 4 protects the vibrating element by being combined with the substrate 7.

However, according to the conventional structure shown in FIG. 1, the piezoelectric vibrating piece is only held at both ends by the metal wire 5.6, so it is weak against shock, and the piezoelectric vibrating piece and the metal wire 5.6 are The need for sufficient space to avoid touching the case has been a major obstacle to miniaturizing piezoelectric vibrators.

The present invention eliminates these drawbacks by sandwiching a piezoelectric vibrating piece between two sheets of conductive material, and by having this conductive material play the three roles of case, electrode, and holding, a compact and robust structure has been created. This is what I did.

FIG. 2 shows an embodiment of the present invention. A piezoelectric vibrating piece 1 has thin film electrodes 2 and 3 on its surface.

Reference numerals 8 and 11 are conductive materials having the same shape, and the piezoelectric vibrating piece 1 is sandwiched between the outer periphery of the conductive materials 8 and 11 with an insulating material 14 interposed therebetween.

The entire outer periphery of this conductive material 8 and 11 is 9 and 13, respectively.
It protrudes from the outer periphery of the piezoelectric vibrating piece 1 as shown in FIG.

The piezoelectric vibrating piece °1 is connected to the inside of this protrusion 9.130 and the step 10.
．． 12, the vicinity of the outer periphery of the surface is held.

Further, a part of the thin film electrode 2.3 of the piezoelectric vibrating piece 1 is drawn out to the vicinity of the outer periphery of the piezoelectric vibrating piece 1 and is electrically connected to the conductive substance.

Thereby, each of the conductive substances 8.11 also serves as an electrode terminal of the thin film electrode 2.3.

The insulating material 14 is interposed between the protrusions 9.13 of the conductive material, and the insulating material 14 and the weight conducting materials 8 and 1 are bonded to each other by adhesive or the like.
1 to hold and fix the piezoelectric vibrating piece.

FIG. 3 shows another embodiment of the present invention, in which protruding steps 15 and 16 are provided inside protrusions 9 and 130 of a conductive material having a protruding outer periphery.

In Figure 3, 1 is a piezoelectric vibrating piece, 2.3 is a thin film electrode, and 8
．． 11 is a conductive material 9, 13 is a protrusion of the conductive material, 15.16 is a protrusion step provided inside the protrusion, and 14 is an insulating material.

The structure shown in FIG. 3 is advantageous when the thickness of the piezoelectric vibrating piece is thin, since it is easy to attach the insulating material and the degree of insulation is improved.

As described above, according to the present invention, the members that hold the piezoelectric vibrating piece, protect it with a case, etc., and pull out the electrode terminals to the outside of the case are integrated into a common member, so the structure is simple, compact and robust. It is possible to manufacture a piezoelectric vibrator.

Furthermore, the number of assembly steps during production can be reduced, and an inexpensive piezoelectric vibrator that is highly mass-producible can be provided.

[Brief explanation of the drawing]

Figure 1 is a structural diagram of a conventional piezoelectric vibrator. FIG. 2 is a structural diagram of an embodiment of the piezoelectric vibrator of the present invention. FIG. 3 is a structural diagram of another embodiment of the piezoelectric vibrator of the present invention. 1... Piezoelectric vibrating piece, 8, 11... Conductive material, 14... Insulating material.

Claims (1)

[Scope of utility model registration request] A piezoelectric vibrating piece having thin film electrodes formed on both surfaces and parts of which are drawn out to the peripheral parts in opposite directions on the front and back sides, and a step or protrusion formed along the outer periphery of the piezoelectric vibrating piece, and the step. In a piezoelectric vibrator made of a pair of conductive material having a protrusion on the outer periphery of the conductive material and an insulating material, the piezoelectric vibrating piece is held between the steps or the protrusion of the conductive material. At the same time, the insulating material is interposed between the outer periphery protrusions of the pair of conductive materials and insulated with an adhesive or the like as a means for electrically connecting the thin film electrode extended to the vicinity of the outer periphery of the piezoelectric vibrating piece. A piezoelectric vibrator characterized in that a piezoelectric vibrating piece is held and fixed by bonding a substance and an outer peripheral protrusion of a conductive substance.