JPH0326569B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a crystal resonator.

Generally, a crystal resonator includes a base 11, a crystal unit inserted into a hole in the base 11, and a crystal unit sealed with glass.
It consists of a pair of leads 12, a crystal piece 13 held between the tips of the leads 12, and a cap 14 that covers the crystal piece 13. The lead 12 consists of a plate-shaped inner lead 15 that holds the crystal piece 13 within the cap 14, and a linear outer lead 16 that penetrates the base 11 and extends outward. In such a crystal resonator, the outer lead 16
The mutual spacing between them is uneven. This is lead 1
This is due to the fact that the leads 12 are mounted at an angle with respect to the base 11, or the wires forming the leads 12 themselves are bent. Since the mutual spacing of the outer leads 16 is uneven, it is not possible to automate the process of later inserting the outer leads 16 of the completed crystal resonator into terminal insertion holes at predetermined intervals on the wiring board. Therefore, this work is performed manually, which is inefficient.

The present invention was made by focusing on the above-mentioned problems in conventional crystal resonators, and by adding a process to the manufacturing process of the crystal resonator by press-molding the outer leads to make the mutual spacing constant. ,
The purpose of this invention is to mass-produce a crystal resonator that can be easily and automatically attached to a wiring board later on at a low cost.

Embodiments of the invention will be described below with reference to the figures. FIG. 1 shows the manufacturing process of a crystal resonator. Here, lead 2 is outer lead 6 and inner lead 5.
It consists of The outer lead 6 is made of a wire rod, and its tip end is connected to a pair of holes 1a bored in the base 1.
It is inserted into 1a and sealed there with glass. As shown in FIG. 3, a plate-shaped inner lead 5 for holding the crystal piece 3 later is welded to a portion of the outer lead 6 that projects upward from the base 1. The inner lead 5 can also be formed integrally with the outer lead 6.

The mold formed as shown in FIG. 1 is then held on a jig 20 as shown in FIG.
Press molding is performed in steps 2 and 23. That is, the lower molds 22 and 23 are placed outside the outer leads 6 and 6, and the upper mold 21 is lowered between the outer leads 6 and 6. Both outer leads 6, 6 are deformed along the shapes of the molds 21, 22, 23, and the distance between them is kept constant as shown in FIGS. 2 and 4. This spacing is equal to the spacing between terminal insertion holes 25a, 25a drilled in the wiring board 25 to which the crystal resonator will be later mounted. Note that the terminal insertion hole 25a of this wiring board 25
can be made equal to the general terminal spacing of circuit elements such as IC chips. Also, outer lead 6
A flat portion 6a is formed at the tip. By forming this flat portion, the outer lead 6 has the same shape as a flat terminal of an IC frame, etc., and can be handled uniformly in the same manner as these. This flattened portion can be shaped by cutting off its periphery in an additional step.

A crystal piece 3 is attached as shown in Fig. 3 to the state shown in Fig. 2, and a cap 4 is placed on it to complete the crystal resonator.

As explained above, the present invention provides outer leads 6, 6 with uneven mutual spacing between molds 21, 2.
Since the outer leads 6, 6 are press-molded in steps 2 and 23 and the spacing thereof is adjusted to a constant value, the outer leads 6, 6 are later inserted into the terminal insertion holes 25a, 25a formed at a predetermined interval in the wiring board 25, and soldered. The attachment work can be automated, and mass production can reduce manufacturing costs to about 1/3 of conventional costs.

[Brief explanation of the drawing]

Figures 1 to 3 are front views showing the assembly process of a crystal resonator step by step, Figure 4 is a front view showing the press molding process, and Figure 5 is a front view of the crystal resonator assembled by the conventional method. It is a front view. 1...base, 2...lead, 3...crystal piece,
4...Cap, 5...Inner lead, 6...Outer lead, 20...Jig, 21...Upper mold, 2
2, 23...lower mold, 25...wiring board, 25a...
...Terminal insertion hole.

Claims (1)

[Scope of Claims] 1. After inserting the upper parts of outer leads 6, 6 made of wire into the pair of holes 1a, 1a of the base 1, and sealing them with glass in the holes 1a, 1a, the base 1
are held on a jig 20, and a pair of lower molds 22, 23 of the same shape are provided on the outside of the pair of outer leads 6, 6 extending from the base 1, respectively, for determining the outer distance between them.
The upper mold 21 for determining the mutual outer spacing between both outer leads 6, 6 is lowered, and the outer leads 6, 6 are press-molded between these molds 21, 22, 23 to adjust the mutual spacing between the wiring board. A method for manufacturing a crystal resonator, comprising the step of adjusting the interval to be equal to the interval between the terminal insertion holes 25a of No. 25. 2 By lowering the upper die 21 between the outer leads 6, 6 disposed between the lower dies 22, 23, the outer leads 6, 6 are press-molded and their mutual spacing is adjusted to the size of the terminal insertion hole 25a of the wiring board 25. At the same time, the outer leads 6, 6 are made uniformly equal to the interval.
The method for manufacturing a crystal resonator according to claim 1, further comprising the step of flattening the tip of the crystal resonator.