JP3692708B2 - Manufacturing method of airtight terminal for crystal resonator and supporter frame used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a hermetic terminal for a crystal resonator, and more particularly to a method for bonding a supporter to an electrode terminal.
[0002]
[Prior art]
FIG. 5 is a cross-sectional view of a conventional hermetic terminal for a crystal resonator. A pair of electrode terminals 4, 4 are sealed with sealing glass 3, 3 so as to pass through a through hole (not shown) provided in the base 2, and the electrode terminals 4, 4 protruding above the base 2 A pair of supporters 5 and 5 are bonded to the side surfaces. In order to use this, a crystal piece 6 is supported between the supporters 5 and 5, and a cap 8 is welded to the upper surface of the base 2 to form a crystal resonator.
[0003]
As a method of adhering the supporter 5 to the electrode terminal 4, the electrode terminal 4, 4 is sealed to the base 2 to assemble the airtight terminal 1 for the crystal resonator, and then the individual supporter 5 is attached to the side surface of the electrode terminal 4, 4. 5 is performed by welding.
[0004]
Further, in order to increase manufacturing efficiency, for example, as shown in FIG. 6, a supporter frame 11 in which a plurality of pairs of supporters 5 and 5 are connected is used, and the supporters 5 and 5 are resistance-welded to a large number of hermetic terminals for crystal resonators at a time. After that, there is also known a method in which the supporters 5 and 5 are cut from the supporter frame 11 by pressing means and separated into individual hermetic terminals 1 for crystal resonators.
[0005]
[Problems to be solved by the invention]
In recent years, as represented by surface-mounted crystal resonators, there is an increasing demand for lowering the height of crystal resonators. As shown in FIG. 7 as an example of a surface-mount type airtight terminal for a crystal resonator, the plate-like electrode terminals 4 and 4 extend along the upper surface of the base 2, and the plate-like electrode terminals 4 and 4 are formed on the electrode terminals 4 and 4. The low profile is realized by welding the supporters 5 and 5.
[0006]
In order to weld a supporter to this type of hermetic terminal for a crystal resonator, due to its structure, it is not possible to employ a method with high production efficiency using a supporter frame as described above. That is, because the supporter is flat and there is almost no space between the supporter and the base, there is no space for inserting the press die (lower teeth) when cutting the supporter frame.
[0007]
In addition, the method of welding individual supporters to the electrode terminals not only has low manufacturing efficiency, but also can maintain the inconvenience that the supporters are too small and difficult to chuck by an automatic machine, and the supporter's positional accuracy. Therefore, there are disadvantages such as a shift in the bonding position of the crystal piece and a defective bonding.
[0008]
The present invention is for solving the above-described problems, and can support a supporter with high manufacturing efficiency even for a low-profile type airtight terminal for a crystal resonator such as a surface mount type, and an electrode. It is an object of the present invention to provide a method for manufacturing a hermetic terminal for a crystal resonator capable of maintaining good positional accuracy of adhesion of a supporter to a terminal and a supporter frame used therefor.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problem, a method for manufacturing a hermetic terminal for a crystal resonator according to the present invention includes a side provided along one side or both sides of a supporter frame in which a pair of supporters are connected to support the crystal resonator. A frame, a connection frame suspended from the side frame, and a supporter provided from the connection frame via a supporter connection piece, the tip of the supporter connection piece being formed so that the cross-sectional area is smaller than other parts. Prepared supporter frame, placing the supporter frame on the airtight terminal for the crystal unit, attaching the supporter to the electrode terminal of the airtight terminal for the crystal unit, and cutting the side frame from the supporter frame The supporter by sandwiching the connecting frame and repeatedly applying a bending moment to the supporter connecting piece. It is intended to include a step of breaking.
[0011]
According to the present invention, the supporter can be bonded to the electrode terminal with high manufacturing efficiency and the positional accuracy of the supporter bonding can be achieved even with a low-profile type airtight terminal for a crystal resonator represented by a surface mount type. It is possible to provide a method for manufacturing a hermetic terminal for a crystal resonator that can be kept good.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
According to a first aspect of the present invention, there is provided a step of preparing a supporter frame in which a pair of supporters for supporting a crystal resonator are connected or a plurality of pairs, and placing the supporter frame on an airtight terminal for the crystal resonator. And a step of bonding the supporter to the electrode terminal of the hermetic terminal for the crystal resonator, and a step of breaking the supporter by repeatedly applying a bending moment to the connecting portion of the supporter frame and the supporter.
[0013]
According to this, even if it is a low-profile type airtight terminal for a quartz crystal resonator using a flat supporter, it is only necessary to break the supporter by giving metal fatigue to the connecting part of the supporter frame and the supporter. There is no need to adopt means. For this reason, the supporter adhesion | attachment method using the supporter frame excellent in manufacturing efficiency is employable.
[0014]
The invention according to claim 2 of the present invention is a supporter frame in which a pair of supporters or a plurality of pairs of supporters are connected to support a crystal resonator, the side frame formed along one side or both sides of the supporter frame, It is provided with a connecting frame suspended from the frame and a supporter formed via a supporter connecting piece extending from the connecting frame. Since one or more pairs of supporters can be bonded simultaneously using this supporter frame, manufacturing efficiency in supporter positioning and welding is improved.
[0015]
The invention according to claim 3 of the present invention is such that the tip of the supporter connecting piece according to claim 2 is formed to have a smaller cross-sectional area than the other parts. According to this, since the strength of the tip of the supporter connecting piece is weak, when the supporter is broken, the other part of the supporter frame is not broken or stress is not given to the supporter itself.
[0016]
According to a fourth aspect of the present invention, there is provided a supporter frame according to the second and third aspects, the step of mounting the supporter frame on the hermetic terminal for the crystal unit, and the hermetic terminal for the crystal unit A step of bonding the supporter to the electrode terminal, a step of cutting the side frame from the supporter frame, and a step of breaking the supporter by sandwiching the connection frame and repeatedly applying a bending moment to the supporter connection piece. According to this method, a large number of supporters can be bonded and broken at a time in a state where a large number of airtight terminals for crystal resonators are set on an alignment jig or the like and a supporter frame is placed thereon. Further, since the supporter can be positioned and placed on the alignment jig after positioning the supporter frame, it is excellent in workability and position accuracy. Further, the supporter can be easily and reliably broken.
[0017]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 2 is a cross-sectional view of a surface-mounted crystal resonator manufactured according to this embodiment.
[0018]
A pair of electrode terminals 4, 4 are sealed by a sealing glass 3 in an internal space (not shown) of an annular base 2 made of ceramic. The electrode terminals 4 and 4 extend along the upper surface of the base 2 and extend along the lower surface of the base 2 through the sealing glass 3. A pair of supporters 5 and 5 are resistance-welded to the upper surfaces of the electrode terminals 4 and 4 appearing on the upper surface of the base 2, and the crystal piece 6 is supported therebetween. A cap 8 is welded to the welding flange 7 sealed on the upper surface of the base 2.
[0019]
Next, a method for manufacturing a hermetic terminal for a crystal resonator according to the present embodiment will be described with reference to FIGS.
[0020]
First, a strip-shaped supporter frame 11 in which a plurality of pairs of supporters 5 and 5 are connected as shown in FIG. The structure will be described in detail. On both sides of the supporter frame 11, a pair of side frames 12 and 12 are formed along the longitudinal direction thereof, and a plurality of connecting frames 13 are formed to connect the side frames. A pair of supporters 5 and 5 are formed from the connection frame 13 via the supporter connection piece 14. The tip of the supporter connecting piece 14 is separated into two parts so as to have a smaller cross-sectional area than the other parts, and is connected to the supporters 5 and 5 and thus is weaker in strength than the other parts. When the supporter is broken, other parts of the supporter frame are not broken, and stress is not applied to the supporter itself to cause deformation.
[0021]
In this embodiment, a strip-shaped supporter frame is used. However, a supporter frame in which only a hoop shape or a pair of supporters are connected may be prepared.
[0022]
Next, as shown in FIG. 1B, a large number of airtight terminals 1 for crystal resonators are set on the alignment jig 9. As the airtight terminal 1 for the crystal resonator, for example, the one manufactured by the means disclosed in Japanese Patent Application No. 7-102076 filed earlier by the present applicant is used. There is no need to limit. Referring to the drawings, the upper surface of a base (not shown) is covered with a welding flange 7 provided with a hole (not shown), from which the sealing glass 3 and the sealing glass 3 are sealed. The attached electrode terminals 4 and 4 are exposed.
[0023]
Next, as shown in FIG. 1 (c), the supporter frame 11 described in FIG. 1 (a) is placed on the aligned airtight terminals 1 for the crystal resonators, and the electrode terminals 4, Supporters 5 and 5 are resistance-welded to the upper surface of 4. Reference numeral 15 denotes resistance welding traces. Thereby, since the supporters 5 and 5 can be welded to many airtight terminals 1 for crystal resonators simultaneously, the workability of supporter positioning and supporter welding is improved. Further, since the positional accuracy is determined by the interval between the alignment jig and the supporter frame, there is no variation.
[0024]
Next, as shown in FIG.1 (d), the side frames 12 and 12 are cut | disconnected from the supporter frame 11 with a press means. Since the width of the supporter frame 11 is formed larger than the outer diameter of the hermetic terminal for crystal resonator, only the side frames 12 and 12 can be pressed reliably.
[0025]
Next, the support frames 5 and 5 are broken from the connection frame 13 by holding the connection frame 13 in a state where the hermetic terminal 1 for the crystal unit is fixed and repeatedly applying a bending moment, as shown in FIG. Are separated into individual hermetic terminals 1 for crystal resonators.
[0026]
Thereafter, a crystal piece (not shown) is supported between the supporters 5 and 5 and a cap (not shown) is resistance-welded to the welding flange 7 to obtain a crystal resonator.
[0027]
As shown in FIG. 1 (a), the support 5 and 5 are broken as shown in FIG. Since the process up to separation into the hermetic terminal for the crystal resonator can be performed, the workability is excellent. Moreover, manufacturing efficiency can be further improved by performing these processes in a series of manufacturing lines.
[0028]
In the present embodiment, the supporter frame is welded in a state where a plurality of pairs of supporter frames are connected, and then the supporter is broken from the connection frame and separated into individual bases. After cutting the pair of supporters in a connected state, the supporters may be welded and broken from the connection frame. Further, although the supporter bonding method is exemplified by the resistance welding method, the method is not limited to this, and means such as laser welding may be used.
[0029]
Furthermore, in the present embodiment, the surface-mounted type quartz crystal hermetic terminal has been described as an example. However, the present invention is not limited to this, and any low-profile type hermetic terminal having a flat plate supporter may be used. The effect of can be obtained.
[0030]
(Embodiment 2)
FIG. 3A is a top view of a supporter frame showing another embodiment.
[0031]
The side frame 12 is formed only on one side of the supporter frame 11, and a connecting frame 13 is suspended therefrom. The manufacturing method using this can be performed by the same method as described in the first embodiment, but the manufacturing equipment can be simplified because the side frame can be cut only on one side.
[0032]
Moreover, as shown in FIG.3 (b), it is good also as a shape where the supporter was provided through the supporter connection piece directly from the side frame. According to this, the process of cutting the side frame can be omitted.
[0033]
(Embodiment 3)
As described in FIG. 1 (a), when the supporter is broken, the tip of the supporter connecting piece is divided into two so that other parts of the supporter frame are not broken and stress is not applied to the supporter itself. However, the present invention is not limited to this, and an equivalent effect can be obtained by reducing the cross-sectional area of the tip of the supporter connecting piece.
[0034]
Specifically, as shown in FIG. 4A, the tip of the supporter connecting piece 14 has a tapered shape, or as shown in FIG. 4B, the tip of the supporter connecting piece 14 is V-shaped. Means such as providing the groove 16 and reducing the thickness can be employed.
[0035]
【The invention's effect】
As described above, according to the present invention, a supporter can be welded using a supporter frame in which a pair or a plurality of pairs of supporters are connected. For this reason, a pair or several pairs of supporters can be welded at a time, and manufacturing efficiency improves.
[0036]
Also, positioning of supporter welding can be performed at a time, and the workability is excellent.
Furthermore, it is possible to achieve an excellent effect that the positioning accuracy of supporter welding can be maintained well.
[Brief description of the drawings]
FIG. 1 is a manufacturing process diagram of an airtight terminal for a crystal resonator according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a crystal resonator manufactured according to the present embodiment. FIG. 4B is a top view of a supporter frame showing another embodiment. FIG. 4A is a top view of a supporter frame showing another embodiment. FIG. FIG. 5 is a cross-sectional view showing a conventional hermetic terminal for a crystal resonator. FIG. 6 is a supporter using a conventional supporter frame. FIG. 7 is a perspective view showing a general surface-mount type airtight terminal for a crystal resonator.
DESCRIPTION OF SYMBOLS 1 Airtight terminal 2 for crystal oscillators Base 3 Sealing glass 4 Electrode terminal 5 Supporter 6 Crystal piece 7 Welding flange 8 Cap 9 Alignment jig 11 Supporter frame 12 Side frame 13 Connection frame 14 Supporter connection piece 15 Resistance welding trace 16 V Groove

Claims (1)

A side frame provided along one or both sides of a supporter frame in which a pair of supporters are connected to support a crystal unit, a connection frame suspended from the side frame, and a supporter connection piece from the connection frame And a supporter frame formed such that the tip end of the supporter connecting piece has a smaller cross-sectional area than other parts, and the supporter is provided on the airtight terminal for the crystal resonator. A step of placing a frame; a step of bonding the supporter to an electrode terminal of the hermetic terminal for the crystal unit; a step of cutting the side frame from the supporter frame; Including a step of breaking the supporter by repeatedly applying a bending moment to the piece. Method for manufacturing a quartz oscillator for airtight terminal to be.

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