JPH0316238Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a sealing jig for airtight terminals, and more specifically, the present invention relates to a sealing jig for airtight terminals, and more specifically, the present invention relates to a sealing jig for airtight terminals. The present invention relates to a hermetic terminal sealing jig that has a function of selecting a lead wire support hole that can be used commonly for lead wires.

BACKGROUND OF THE INVENTION Crystal resonators, which are made by connecting and fixing a crystal piece to a lead wire of an airtight terminal and hermetically sealing it with a cap, are used in various small electronic devices such as wristwatches. A typical airtight terminal for a small crystal resonator has two lead wires 3, 3 hermetically sealed inside a cylindrical metal outer ring 1 with a glass 2 in between, as shown in Fig. 2. It is. Conventionally, such hermetic terminals
As shown in FIG. 3, the fitting recess 5 of the metal outer ring 1
and a metal outer ring 1 in a recess 5 of a lower sealing jig 4 made of carbon having lead wire insertion holes 6, 6.
After fitting the glass tablet 2a with insertion holes for the lead wires 3, 3, inserting the lead wires 3, 3 into the lead wire insertion holes 6, 6 through the insertion holes of the glass tablet 2a, The upper ends of the lead wires 3, 3 are stacked on the lower sealing jig 4, and the upper sealing jig 7 has a recess 8 and an insertion hole 9, 9 for the lead wires 3, 3 on the lower surface thereof. The glass tablet 2a is fitted into the glass tablet 2a, and the entire glass tablet 2a is heated in this state to melt the glass tablet 2a, and the lead wires 3 are sealed while maintaining predetermined relative positions.

Problems to be Solved by the Invention Until now, the sealing jig for the hermetic terminal as described above has been designed to accommodate changes in the diameter of the lead wires 3 and the length of the protrusion from the lower end of the metal outer ring 1. Each hermetic terminal was prepared according to its type and dimensional standards. Further, since the sealing jig discharged from the glass tablet 2a melting device is heated to a high temperature, it cannot be reused until a predetermined cooling time has elapsed. For these reasons, the dimensional standards for airtight terminals, more specifically, the diameters of the lead wires 3, 3, which are the constituent members of airtight terminals, and the length of the protrusion from the lower end of the metal outer ring 1 have been limited. In response to the changes, a large number of sealing jigs have been prepared for each hermetic terminal. As a result, conventional sealing jigs have problems such as increased storage space, misuse and reduced productivity due to having to select the one to be used from among a large number of sealing jigs. points are occurring.

The main purpose of the present invention is to provide a solution to the above-mentioned problems found in conventional hermetic terminal sealing jigs.

Means for Solving the Problems In view of the above object, the present invention is an airtight terminal sealing jig for glass-sealing a lead wire to a metal outer ring, which has a through hole for positioning and fixing the lead wire. an upper sealing jig with a lead wire insertion hole, an intermediate sealing jig with a support step for the metal outer ring and the glass tablet, and a protruding length of the lead wire from the lower end of the metal outer ring. A lower sealing jig is provided with a bottomed hole for positioning and fixing the lower end of the lead wire, and is adapted to accommodate changes in the diameter of the lead wire and the length of protrusion from the end of the metal outer ring. The present invention provides a sealing jig for an airtight terminal, in which two or more types of through holes, insertion holes, and bottomed holes having different hole diameters and/or depths are arranged concentrically under a predetermined phase angle. That is.

Function When changing the diameter of the lead wire glass-sealed to the metal outer ring or the protruding length of the lead wire from the lower end of the metal outer ring, two
By selecting and using suitable ones from among the various types of through holes, insertion holes, and bottomed holes, the number of sealing jigs that must be kept at all times can be reduced to 25% compared to the conventional method.
reduced to less than %.

Embodiment FIG. 1A is a partial plan view of the airtight terminal sealing jig according to the present invention, and FIG. 1B is a partial plan view of the line -
FIG. As seen in these drawings, the sealing jig for the airtight terminal connects the lead wire 1.
0, 10... positioning and fixing through holes 11, 11...
..., an intermediate sealing jig 17 having lead wire insertion holes 13, 13..., a support step 16 for the metal outer ring 14 and the glass tablet 15, and a metal outer ring 12. Lead wire 1 from the bottom end of 14
Stacking lower sealing jigs 19 each having bottomed holes 18, 18, . . . for regulating the protruding length L of 0, 10, . It is composed of.
When stacking the sealing jigs 12, 17, 19, the through holes 11, 11 for positioning and fixing the upper sealing jig 12 are
..., lead wire insertion hole 13 of intermediate sealing jig 17,
13... and the bottomed hole 18 of the lower sealing jig 19,
18... is the lead wire 1 inserted into the sealing jig
Its diameter and metal outer ring 1 for 0,10...
In order to form a selectable linear support mechanism corresponding to the protrusion length L from the lower end of the holes, the relative arrangement positions are regulated so that the centers of the holes are located on the same straight line. In this embodiment, in order to seal the three lead wires 10a, 10a, 10a inside the metal outer ring 14 of the first hermetic terminal 21 via the glass tablet 15, graphite sealing is used. jig 12,
17, 19 are the first lead wires 10a, 10
First positioning and fixing through holes 11a, 11a, ₁₁ having a hole diameter D ₁ corresponding to the diameter d 1 of a, 10a
a, first lead wire insertion hole 13a, 13a, 13
a and the first positioning and fixing bottomed hole 18a, 1
8a, 18a and the depth of the first positioning and fixing bottomed holes 18a, 18a, 18a from the lower end of the metal outer ring 14 to the first lead wire 10.
It is set to match the protrusion length L ₁ of a, 10a, and 10a. Sealing jig 12, 17, 19
The second lead wires 10b, 10b10b have different diameters and protruding lengths from the lower end of the metal outer ring 14 than the first lead wires 10a, 10a, 10a used in the first airtight terminal 21. It can also be used for sealing. That is, as seen in FIG. 1, the hole diameter _D 2 for the second lead wires 10b, 10b, 10b drilled in the upper sealing jig 12, intermediate sealing jig 17, and lower sealing jig 19 second positioning and fixing through holes 11b, 11b, 11 having
b, second insertion holes 13b, 13b, 13b and second positioning and fixing bottomed holes 18b, 18b, 1
8b are the first lead wires 10a, 1, respectively.
First positioning and fixing hole 11 for 0a and 10a
a, 11a, 11a, first insertion hole 13a, 13
a, 13a and the first positioning and fixing bottomed hole 1
The first hole group 11a, 11a, 11a, 13 is located approximately in the middle of the holes 8a, 18a, 18a.
a, 13a, 13a, 18a, 18a, 18a and second hole group 11b, 11b, 11b, 13b, 1
3b, 13b, 18b, 18b, and 18b are arranged concentrically with respect to the center of the metal outer ring 14 at a phase angle of 60°, thereby creating two types of lead wires 10a and 18b with different diameters. A sealing jig that can be used commonly for 10a, 10a and 10, 10b, 10b is formed. Note that the depth of the second positioning and fixing bottomed holes 18b, 18b, 18b is the same as the depth of the lead wires 10b, 10b,
It is set to match the protrusion length L ₂ of 10b.

As an applied example when implementing the present invention, the first and second positioning and fixing bottomed holes 18a, 18a, 18a and 18 are formed on the bottom surface of the lower sealing jig 19.
Align the center of the hole with b, 18b, 18b and make the third hole.
and fourth positioning and fixing bottomed holes 18c, 18
It is also possible to drill holes c, 18c and 18d, 18d, 18d. According to this embodiment:
By inverting the upper and lower surfaces of the lower sealing jig 19, one lower sealing jig can be used to create four types of metal outer ring 14 with different diameters or protruding lengths from the lower end. A lower sealing jig 19 that can be used commonly for lead wires is formed.

The lead wires 10, 10..., the metal outer ring 14, and the glass tablet 15 are loaded into the upper sealing jig 12, intermediate sealing jig 17, and lower sealing jig 19 having such a structure, and Lead wire 1 is melted by melting the glass tablet according to the method.
0, 10... are sealed to the metal outer ring 14 while maintaining predetermined relative positions.

Above, 10 lead wires per 141 metal outer rings
Although the method for sealing lead wires has been described for an airtight terminal in which the number of sealed wires is three, the scope of the rights of the present invention should not be interpreted to be limited based on the description of such embodiments. That is, as long as the positioning and fixing through holes 11, 11..., lead wire insertion holes 13, 13..., or the positioning and fixing holes 18, 18... formed in the same sealing jig do not overlap, the metal The through hole 1 for positioning and fixing is determined according to the number and diameter d of the lead wires 10 to be sealed to the outer ring 14 and the protrusion length L from the lower end of the metal outer ring 14.
1. The arrangement position, diameter, and depth of the lead wire insertion hole 13 and the bottomed hole 18 for positioning and fixing can be arbitrarily selected.

Effects of the invention According to the invention, when a lead wire is glass-sealed to a metal outer ring, the same sealing can be achieved depending on the diameter of the lead wire or the length of the lead wire protruding from the lower end of the metal outer ring. A suitable hole can be selected from among two or more types of through holes for positioning and fixing, lead wire insertion holes, and bottomed holes for positioning and fixing formed in the jig. As a result, the number and types of sealing jigs that must be kept at all times are 25% lower than with conventional methods.
%, thereby achieving effects such as saving storage space for sealing jigs and eliminating the trouble of selecting a target jig from among a large number of sealing jigs.
Thus, the present invention is extremely useful as it provides a means for facilitating the management of sealing jigs.

[Brief explanation of the drawing]

FIG. 1A is a partial plan view of the hermetic terminal sealing jig according to the present invention, and FIG. 1B is a line -
FIG. Further, FIG. 2 is a longitudinal cross-sectional view of an airtight terminal, and FIG. 3 is a partial longitudinal cross-sectional view of a conventional airtight terminal sealing jig. 10... Lead wire, 11... Through hole for positioning and fixing, 12... Upper sealing jig, 13... Lead wire insertion hole, 14... Metal outer ring, 15... Glass tablet, 16... Glass tab Support stepped portion of let and metal outer ring, 17... Intermediate sealing jig, 18... Bottomed hole for positioning and fixing, 19... Lower sealing jig, L
……Protrusion length of the lead wire from the lower end of the metal outer ring,
d...Diameter of lead wire, D...Diameter of hole.

Claims (1)

[Scope of utility model registration request] A sealing jig for an airtight terminal that glass-seals a lead wire to a metal outer ring, the upper sealing jig having a through hole for positioning and fixing the lead wire, an insertion hole for the lead wire, and a metal outer ring. and an intermediate sealing jig equipped with a support stepped portion for the glass tablet, and a bottomed hole for regulating the protruding length of the lead wire from the lower end of the metal outer ring and for positioning and fixing the lower end of the lead wire. and a lower sealing jig equipped with a lower sealing jig, in which two or more types of the transparent holes are formed with different hole diameters and/or depths in response to changes in the diameter of the lead wire and the protrusion length from the lower end of the metal outer ring. A sealing jig for an airtight terminal, characterized in that a hole, an insertion hole, and a bottomed hole are arranged concentrically with a predetermined phase angle formed.