JPH032992Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field This invention relates to an airtight terminal for a crystal resonator, and more specifically, the invention relates to an airtight terminal for a crystal resonator, and more specifically, the invention is provided with a support having an elongated slit for vertically or horizontally inserting and holding a disc-shaped crystal piece. Related to airtight terminals for crystal resonators.

Prior Art Crystal resonators have various structures depending on the shape of the crystal piece, the method of holding it, etc.

Figures 1 to 3 show an airtight terminal for a crystal resonator for holding a disk-shaped crystal piece vertically,
1 is a plan view, FIG. 2 is a sectional view taken along the - line in FIG. 1, and FIG. 3 is a side view of FIG. 1. In the figure, reference numeral 1 denotes an oval metal outer ring, which has through holes 2 near both ends in the longitudinal direction. Lead wires 4, 4 are hermetically and insulated sealed to each of the through holes 2, 2 via glasses 3, 3, and each lead wire 3, 3 has a support member having a vertically long slit 6, 6. 5,
5 is welded. And support member 5,
A disk-shaped crystal piece 7 is inserted between the slits 6 and 6 of the slit 5, as shown by the two-dot chain line in FIG. 2, and fixed with a conductive adhesive.

The above-mentioned support members 5, 5 are manufactured by etching or press punching a thin metal plate, but the etching method requires expensive equipment, and moreover, it requires the application, exposure, development, etching, and photoresist agent application. There are complicated processes such as removal and cleaning of photoresist agents,
Material costs such as a developer, an etching solution, and an organic solvent are also required, making the support member expensive. On the other hand, the method using press punching requires processing one piece at a time, but has the advantage that both equipment costs and processing costs are low, and the support member is inexpensive.

Figures 4 to 6 were created by the applicant in 1973.
The airtight terminal proposed in Publication No. 146877 is shown. 4 is a plan view, FIG. 5 is a sectional view taken along the - line in FIG. 4, and FIG. 6 is a side view of FIG. 1. This hermetic terminal uses supported lead wires 8, 8 in which a support part 10 having a slit 11 is integrally formed in the lead part 9 by press working.
Like the airtight terminal shown in FIGS. 3 to 3, there are advantages in that the trouble of welding the support members 5, 5 to the lead wires 4, 4 is not required, the terminal is not only inexpensive, but also does not cause problems such as misalignment.

By the way, as electronic components have become lighter, thinner, shorter, and smaller in recent years, hermetic terminals for crystal resonators have also become smaller and smaller, and the support member 5 and the support part 10 of the lead wire 8 with support have also become smaller. As devices have become smaller, the widths of the slits 6 and 11 have also become smaller. However, slit 6,1
As the width of 1 becomes smaller, the width of the punching blade also becomes smaller, and its mechanical strength decreases, making the blade more likely to chip or break.Those with a slit width below a certain value cannot be manufactured using press processing. I couldn't do it.

Purpose of the invention Therefore, the purpose of this invention is to provide an inexpensive hermetic terminal for a crystal resonator by making it possible to manufacture a support with a small slit width by press working.

Structure of the invention This invention is characterized by forming holes at both ends of a slit of a constant width that are continuous with the slit and wider than the slit.

In other words, if a wide hole continuous with the slit is formed at both ends of a slit of a constant width, and if both the slit and the hole are punched once, the punching die will have a wide shape at both ends and the mechanical strength will increase. In the case of two-step punching, in which the holes at both ends are first punched and then the slits are punched, there is no need to apply any negative force to the ends, which were prone to chipping in the past, so there is no chance of chipping or breaking of the punching blade. This eliminates the need for narrow slits, which was previously impossible, and enables the provision of inexpensive airtight terminals for crystal resonators.

Embodiment An embodiment of this invention will be described below with reference to FIGS. 7 to 9. Figure 7 is a plan view, Figure 8
The figure is a sectional view taken along the - line in FIG. 7, and FIG. 9 is a side view of FIG. 7.

The figure is similar to FIGS. 4 to 6 except for the following points, so the same parts are given the same reference numerals. The feature of this embodiment is that the lead wires 12, 12 with supports include lead parts 13, 13 and support parts 14, 14 integrally formed therewith, and the support parts 14, 14 have a thickness of the crystal piece 7. The slits 15, 15 have a constant width d corresponding to the slits 15, 15, and the slit 1
5, 15, and this slit 15, 15
It has round holes 16, 16 with a diameter D wider than that.

The above-mentioned lead wires 12, 12 with supports are prepared by preparing a lead wire with a predetermined outer diameter, pressing a part of it to form a flat part, and then press punching the flat part to form the above-mentioned slit 15 and holes at both ends. 16,1
It is manufactured by forming 6. The slit 15 and the holes 16, 16 at both ends may be formed at the same time by one punching, or the holes 16, 16 at both ends may be formed first.
The slits 15 may be punched out after forming the slits 15.

In the above airtight terminal for a crystal resonator, the support portion 14 is integrally formed by pressing the lead wires 12 with supports into a part of the lead wire of a predetermined length, so the support portion 14 is formed separately by an etching method or a pressing method. It is easier and cheaper to manufacture than welding the support members 5, 5 manufactured in
Problems such as misalignment of welding do not occur. Moreover, at both ends of the narrow slit 15, there are holes 1 that are continuous with this slit 15 and are wider than this slit 15.
6 and 16, so in the case of one-time punching, the punching blade has enlarged portions at both ends, which significantly increases its mechanical strength.
In the case of two-step punching, in which parts b and 15b are formed and then the central part 15a is punched out, there is no load placed on both ends of the narrow punching blade, so there is no chipping or breakage of the blade, and the punching process is better than before. It becomes possible to form narrow slits.

The shapes of the holes 16, 16 at both ends are preferably round as shown in the figure, but may be rectangular or the like. In some cases, a large diameter hole may also be formed in the center of the slit 15.

In addition, it is cheapest to manufacture a supported lead wire by pressing a single lead wire as shown in the figure, but if a small diameter outer lead is required, a small diameter outer lead wire is required. The side lead part and the large diameter inner lead part may be fixed and integrated by butt welding, and the support part may be formed on the large diameter inner lead part by press working.

Furthermore, in some cases, a separately manufactured support member may be welded to the lead wire.

In the above embodiment, separate through holes 2, 2 are formed near both ends of a thick metal outer ring 1, and supported leads are inserted through separate glasses 3, 3 for each through hole 2, 2. We have described the case where the wires 12, 12 are sealed, but it is also possible to form separate through holes in a thin top plate made of Kovar, copper-clad Kovar, etc., and connect the supported lead wires through a common glass to each hole. Alternatively, lead wires with supports may be sealed near both ends of a single oval through hole.

Furthermore, in some cases, through-holes are formed at two locations in the radial direction of the circular metal outer ring, and each through-hole has a support having an oblong slit for horizontally holding a disc-shaped crystal piece. The attached lead wire may be sealed.

Effects of the invention As described above, this invention forms holes at both ends of a slit of a constant width that are continuous with the slit and wider than the slit, making it difficult or difficult to manufacture using conventional rectangular slits. It is now possible to press a narrow slit, which was previously possible, and airtight terminals for crystal resonators can be provided easily and at low cost.

[Brief explanation of drawings]

FIG. 1 is a plan view of a conventional airtight terminal for a crystal resonator, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 3 is a side view of FIG. 1. Figure 4 is a plan view of another conventional hermetic terminal for a crystal resonator, and Figure 5 is a plan view of another conventional hermetic terminal for a crystal resonator.
6 is a sectional view taken along the - line in the figure, and FIG. 6 is a side view of FIG. 4. FIG. 7 is a plan view of an airtight terminal for a crystal resonator according to an embodiment of the invention, FIG. 8 is a sectional view taken along the - line in FIG. 7, and FIG. 9 is a side view of FIG. 7. 1...Metal outer ring, 2...Through hole, 3...Glass,...
12...Lead wire with support, 13...Lead part, 14...Support part, 15...Slit, 1
6...hole.

Claims (1)

[Claims for Utility Model Registration] 1. A pair of lead wires is hermetically and insulated sealed in a through hole of a metal outer ring through a glass, and a slit for inserting a crystal piece is provided on the inner side of the lead wire. In an airtight terminal for a crystal oscillator comprising a support, the slit has a constant width slightly larger than the thickness of the crystal piece, and at both ends of the slit, there are slits continuous with and wider than the slit. An airtight terminal for a crystal resonator characterized by having a hole formed therein. 2. The airtight terminal for a crystal resonator according to claim 1, wherein the hole is a round hole. 3. The hermetic terminal for a crystal resonator according to claim 1, wherein the support is integrally formed with a lead wire.