JPH0226885B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chip-shaped piezoelectric vibrating component, and more particularly to a chip-shaped piezoelectric vibrating component having an improved structure for holding or positioning an energy-containing piezoelectric vibrating element.

FIG. 1 is a perspective view showing an example of a chip-shaped piezoelectric vibrating element that forms the background of this invention and can be used in this invention. The piezoelectric vibrating element 1 includes a piezoelectric plate 11 made of, for example, ceramic.
0, and opposing vibrating electrodes 111 and 121 are formed on both surfaces of the plate, respectively. Vibrating electrodes 111 and 121 cooperate to produce energy-confining thickness-shear vibrations in the piezoelectric plate. These vibrating electrodes 11
1 and 121 are lead electrodes 112, respectively.
and 122 lead to extraction electrodes 113 and 12.
3 respectively.

Such a piezoelectric vibrating element 1 is inserted into a case 2 as shown in FIG. 2, and conductive terminals 4, 4 are attached to both open ends 3, 3 of the case 2.
The piezoelectric vibrating element 1 is inserted into the recesses 5, 5 of the terminals 4, 4.
There is something that I supported. Note that 6 and 6 are conductive joining members. However, in this conventional device, the shapes of the terminals 4, 4 are complicated, which hinders cost reduction.

In view of the above, the present invention aims to provide a chip-shaped piezoelectric vibrating component having a simple terminal shape and a structure that does not hinder the vibration of a piezoelectric vibrating element.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

In FIG. 3, case 2 is cylindrical with openings at both ends, and the openings are covered by caps 31 and 32, respectively. Caps 31 and 32 and extraction electrodes 113 and 12 of piezoelectric vibrating element 1 housed in case 2
3 (FIG. 1) are electrically connected by conductive connecting members 41 and 42 such as conductive paint or creamy solder. To be more specific, a ring-shaped raised bank 50 is formed on the inner wall of the case 2 at the right end in the figure, and the lead electrode 12 of the piezoelectric vibrating element 1 is located at the lower part of the raised bank 50 in the figure.
2 or part of the extraction electrode 123 is supported in contact with the vibrating electrode 121, so that a gap reliably exists in the vicinity of the vibrating electrode 121 and the inner wall of the case 2.

FIG. 4 shows another example of case 60, case 6
The aperture on one opening side of 0 is smaller and the raised portion 6
1.

In the above embodiments, the cylindrical case and the cap are circular or square, respectively, but it is also possible to use a circular cap in a case where only both ends are circular and the rest is square. be.

As is clear from the above embodiments, according to the present invention, the caps provided at both ends of the case are used to house the piezoelectric vibrating element in the case and electrically and mechanically connect and fix it to the terminals provided at both ends of the case. Since the conductive connecting member is present in the shaped terminal to achieve electrical and mechanical connection and fixation, it is possible to provide a chip-shaped piezoelectric vibrating component at low cost. In addition, there is a raised part on one end of the inner wall of the case, and the piezoelectric vibrating element is supported by this raised part, so that there is always a space between the vibrating part and the inner wall of the case. It can be reproduced as is even after it has been incorporated into a device, eliminating characteristic defects caused by contact between the piezoelectric vibrating element and the inner wall of the case, increasing yield.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a piezoelectric vibrating element that forms the background of this invention and can be used in this invention. Figure 2 is an illustrative cross-sectional view showing an example of a chip-shaped piezoelectric vibrating component, which is the background of this invention;
The figure is an illustrative cross-sectional view showing one embodiment of the present invention.
The figure is a cross-sectional view of the case. 1 is a piezoelectric element, 2, 60 is a case, 3
1 and 32 are caps, 41 and 42 are conductive connecting members, 50 is a raised embankment, and 61 is a raised portion.

Claims (1)

[Scope of Claims] 1. An energy-containing piezoelectric vibrating element in which a pair of vibrating electrodes are formed; a cylindrical case having openings formed at both ends thereof and in which the piezoelectric vibrating element is housed; the case; a cap formed of a thin plate of a conductive material and having a side circumferential surface and a flat end surface integrally connected to the openings at both ends of the piezoelectric vibrating element; In a chip-shaped piezoelectric vibrating component that is equipped with a conductive connecting member for electrical connection, a part of the inner wall surface on one opening side of the case is raised to support the piezoelectric vibrating element, thereby increasing the distance between the vibrating part and the inner wall surface of the case. A chip-shaped piezoelectric vibrating component characterized by the existence of a space.