JPH0242807A - Manufacture for terminal in piezoelectric resonator - Google Patents

Abstract

PURPOSE:To decrease the number of parts and assembly mahour to attain cost reduction and to improve automation in manufacture by double bending one plate for terminal and unitedly providing two terminals. CONSTITUTION:Two contact projecting parts 5a are protruded in a same direction and provided with a prescribe interval l on a plate 5 for terminal. On the plate 5 between the projecting parts 5a, a linking part 5b is remained and a notch 6 is formed in a width-wise direction. Then, the plate 5 is partitioned to two terminals 5c and 5d. Further, a notch 7 is formed in a length-wise direction from the notch 6 in one terminal 5c and a leg terminal 5e is partitioned. A prescribed are is obtained in the linking part 5b and the terminal 5c is bent to the terminal 5d. Then, the projecting parts 5a are faced so as to be protruded mutually in an opposite direction. As a result, the R of the linking part 5b prevents the bend damage of the linking part and spring force is operated to the both terminals 5c and 5d. Then, contact and holding force to an element which exists between the both terminals can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a terminal for a piezoelectric resonator, and more particularly to a method for manufacturing a terminal for a piezoelectric resonator having an improved piezoelectric resonator holding structure.

As shown in FIG. 1, for example, a ladder type ceramic filter has elements 1, . . . , 11 terminals 2 (2a to 2h).
, insulation plate 3. . . , 3 are stacked in a sandwich shape, and the terminal 2 has various shapes as shown in Fig. 2(a) to Fig. 2(C). Since the terminals 2b, 2c, 2e, and 2f had to be manufactured and assembled individually, the number of parts and assembly man-hours increased, resulting in an increase in cost and was not suitable for automation.

The present invention provides a method for manufacturing a terminal for a piezoelectric resonator, which can solve the problem of the piezoelectric resonator holding structure by simply adding a slight modification to the terminal. ) to FIG. 3(C), as shown in FIG. 3(a), two contact protrusions 5a, 5a are provided on the terminal flat plate 5 at a predetermined interval a, protruding in the same direction, A notch 6 in the width direction is formed in the flat plate 5 between each of the contact protrusions 5a, 5a, leaving a connecting part 5b, dividing it into two terminals 5c, 5d. A notch 7 in the direction is formed to divide the leg portion 5e.

Then, as shown in FIG. 3(b) and FIG. 3(C), the connecting portion 5b is given a predetermined curvature (R) and the terminal 5c is bent in two over the terminal 5d, so that each contact protrusion 5a,
5a are opposed to each other so as to protrude in opposite directions.

By rounding the connecting portion 5b, it is possible to prevent the connecting portion 5b from breaking, and at the same time, both terminals 5c can be prevented from breaking.

A spring force acts on 5d to improve the contact with the element 1 and the holding force of the element 1.

On the other hand, as shown in FIG. 4(a), the legs 5 are attached to the terminal flat plate 5 in advance.
4(b).
, as shown in FIG. 4(c), a predetermined curvature (
Bend the terminal 5C in two over the terminal 5d with the rounded edges to form each contact protrusion 5a.

It is also possible to have a structure in which the parts 5a are opposed to each other so as to protrude in opposite directions.

As described above, according to the present invention, since one flat plate for terminals is folded into two pieces and two terminals are provided integrally, the number of parts and the number of assembly steps are reduced. This will reduce costs and make it suitable for automation. Furthermore, in the case of conventional two terminals, assembly errors such as forgetting to insert one terminal or inserting too many terminals tend to occur, but this does not occur with the present invention.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a ladder-type ceramic filter, Figures 2 (a) to 2 (c) are plan views of conventional terminals, and Figure 3 (
a) and FIG. 4(a) are perspective views of a flat plate for terminals according to the present invention, and FIGS. 3(b) and 4(b) are perspective views of terminals manufactured according to the present invention. 4(c) and 4(c) are side views of the terminals of FIG. 3(b) and FIG. 4(b), respectively. 5... Flat plate for terminal, 5a... Contact protrusion, 5b...
Connecting parts, 5c, 5d...terminals, 6.7...notches.

Claims (1)

[Claims] (1) Provide two contact protrusions protruding in the same direction at a predetermined interval on a flat plate for a terminal, and form a notch in the flat plate between each contact protrusion leaving a connecting part, and make a notch in the flat plate at a predetermined distance between the contact protrusions. 1. A method of manufacturing a terminal for a piezoelectric resonator, comprising bending two flat plates with a curvature of .