JPS59225605A - Piezoelectric vibrator - Google Patents

Abstract

PURPOSE:To attain the manufacture by using a plug body and a cylindrical case in common by using a piezoelectric vibrating chip of different size through the modification of an inner lead of the plug body relating to the structure of the piezoelectric vibrator made of a crystal oscillator or the like. CONSTITUTION:The base width W of the vibrating chip 19 sealed in vacuum in the cylindrical case 20 is smaller than the distance S between outer ends of a plug body fixing end face 21 of an inner lead 14 and inner lead tip parts 22 fixed to the vibrating chip 19 are fixed at a narrow distance than the distance between the outer ends of the plug body fixing end face 21 of the inner lead 14. As to the method forming the distance between the tip parts 22 of the lead 14 narrower than the distance S between the outer ends of the plug body fixing end face 21 in order to fix the base part 18 of the vibrating chip 19, the inner lead is fixed while being bent by using an exclusive device with the plug body used in common.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of crystal oscillators and other piezoelectric oscillators used in wristwatches and the like.

The gist of the present invention is to use piezoelectric oscillation pieces of different sizes by modifying the inner leads of the plug body, thereby making it possible to manufacture the plug body using a common plug body and cylindrical case. Therefore, an object of the present invention is to provide a low-cost piezoelectric vibrator by reducing the number of parts by using a common plug body and a cylindrical case, and by simplifying the process.

As an example of a conventional piezoelectric vibrator, a conventional example of a tuning fork type crystal vibrator is shown in a plan cross-sectional view in FIG. The figure (A) shows a plug body 4 formed by mesh-sealing a lead terminal 3 consisting of an inner lead 1 and an outer lead 2;
It is composed of a tuning fork type crystal oscillator having a base 5 fixed to the tip of the inner lead 1, and a cylindrical case 7 in which the tuning fork type crystal oscillation piece 6 is vacuum sealed by vacuum sealing with the shell plug body 4. A tuning fork type crystal resonator 100 is shown. The tuning fork type crystal resonator 200 shown in FIG.
1 is a plug body, 12 is a tuning fork type crystal resonator, and 13 is a cylindrical case. As shown in the figure, a conventional tuning fork crystal resonator 1
00, 200, other components are used depending on the size of the tuning fork type crystal oscillator piece 6.12, namely, a plug body 4.11 and a cylindrical case 7.13.

As described above, in the configuration of the conventional tuning fork type crystal resonator, it has become difficult to meet the rapid price competition in wristwatches, calculators, etc. by simply reducing the unit cost of each component. For example, in FIG. 1(A), the base width W of the tuning fork type crystal oscillator piece 60 is 19. When the leg length IA is 14.16 m, the outer diameter D of the cylindrical case 7 is 2 scales.

The body length H is 6 songs, and in the same figure (B) there are 190 tuning fork type crystal oscillator pieces, the part width WB is a6awb, and the leg length L
If B is 3.46 m, the outer diameter of the cylindrical case 13]) E is 1.501, and the body length HB is 5 increments (of course, the sizes of the plug bodies 4 and 11 are also different). The components are different depending on the size of the tuning fork type crystal oscillator pieces 6 and 12, and the price is low. Therefore, as mentioned above, it is difficult to provide a low-priced piezoelectric vibrator only by making efforts to reduce the unit cost of each component. The present invention focuses on the sharing of component parts in view of the above circumstances, and aims to reduce the number of parts and simplify the process.The present invention is an example of a piezoelectric resonator, and the implementation of a tuning fork type crystal resonator. An example is shown in a plan sectional view in FIG. In the figure, the present invention includes a plug body 17 formed by hermetically sealing a lead terminal 16 consisting of an inner lead 14 and an outer lead 15, and a tuning fork type crystal oscillator in which a base 18 is fixed to the tip of the inner lead 14. A tuning fork type crystal oscillator 300, which is composed of a piece 19 and a cylindrical case 20 that vacuum-seals the tuning fork type crystal oscillator piece 19 by vacuum sealing with the plug body 1'7, is installed in the cylindrical case 20. The base width W of the tuning fork type crystal oscillation piece 19 sealed in vacuum is smaller than the distance between the outer ends of the inner lead 14 at the plug body fixed end face 21, and is fixed to the tuning fork type crystal oscillation piece 19. The inner lead tip 22 is a tuning fork-shaped crystal characterized by the above structure, in which the inner lead 14 is fixed at a distance S narrower than the distance S between the outer ends of the plug body fixed end face 21. It is a vibrator. In this example, the plug body 17 and the cylindrical case 20 are those shown in the conventional example in FIG. 1(A), and the tuning fork type crystal oscillator piece 19 is as shown in FIG. 1(B).
Use the one shown. In the embodiment of the present applicant, the width of the base of the tuning fork type crystal oscillator piece 190 is 0.641! n, the distance s between the outer ends of the inner lead 14 on the fixed end surface of the plug body when the wire diameter of the lead terminal 16 is 0.18 mm is α83.
It is designed like a horse mackerel. In order to fix the tuning fork type crystal oscillation piece 190 to the base 18, the distance a between the outer ends of the tip 22i of the inner lead 14 at the plug body fixed end face 21, ! :, 9 can also be formed into a narrow range by easily curving the plug using a dedicated device. FIG. 1(A) is formed by forming this bending.

Tuning fork type crystal oscillator piece 6°12 with different heights shown in (B)
The plug body 41 and the cylindrical case 7 are vacuum-sealed as common components, and constituted by a tuning-fork type crystal vibrating solid metal structure. Note that the shape of the inner lead 14 shown in the front views of FIGS. 3(A) to 3(F) is effective;
As shown in FIGS. 4(A) to 4(D), it is also effective to provide the shape of the tip with a larger area than the diameter of the inner lead wire for fixation. The above configuration can also be easily formed as a single plug using a dedicated device.

As described above, according to the present invention, the number of parts can be reduced by standardizing component parts, and the unit cost of parts can be reduced through mass production, and processes can be simplified and made more efficient. A tuning fork type crystal resonator that is 7 to 10% cheaper can be obtained.

Original F! Although the A11-t1 tuning fork type crystal resonator has been described as an example, the same principle can be obtained in a piezoelectric resonator such as a ceramic resonator.

[Brief explanation of drawings]

FIGS. 1(A) and 1(B) are plan sectional views showing an example of a tuning fork type crystal resonator. FIG. 2 is a plan sectional view showing an embodiment of the tuning fork type crystal vibrator of the present invention. FIGS. 3A to 3F are front views showing the shape of id and inner leads. FIGS. 4(A) to 4(D) are front views showing the shape of the tip of the inner lead. 14... Inner lead 15... Outer lead 16... Lead terminal 11... Plug body 18... Tuning fork type crystal oscillation piece 190 base 20... Cylindrical case 21... Fixing of plug body 17 End face 22...Tip portion W of the inner lead 14...
Width S-° of the base 18 of the tuning fork crystal oscillator piece 19...Distance between the outer ends at the fixed end surface 21 of the plug body 17 of the inner lead 14 (A)', (IEI) (C)
(D) Square 4 diagram

Claims (1)

[Claims] A plug body formed by completely hermetically sealing a lead terminal consisting of an inner lead and an outer lead, a piezoelectric oscillation piece whose base is fixed to the tip of the inner lead, and the plug body are vacuum-sealed to generate the piezoelectric oscillation. The width of the base of the piezoelectric oscillation piece, which is vacuum-sealed by the cylindrical case, of a piezoelectric vibrator configured with a cylindrical case that is completely vacuum-sealed on one side is:
The distance between the outer ends of the inner lead on the plug body fixed end face is smaller than the distance between the outer ends of the inner lead on the plug body fixed end face, and the inner lead tip portion fixed to the piezoelectric oscillation piece is narrower than the distance between the outer ends of the inner lead on the plug body fixed end face. A piezoelectric vibrator characterized by the above configuration, in which the piezoelectric vibrator has the above configuration.