JPS634727B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a frequency adjusting device for a crystal resonator, particularly,
The present invention relates to a crystal resonator adjustment device that adjusts the frequency by depositing a minute amount of metal material on the surface of the crystal resonator.

Generally, as shown in FIG. 1, a crystal resonator 1 is manufactured by providing excitation electrodes 3, 3 (one of which is shown in FIG. (not shown) and terminals 4, 4, and after this crystal piece 2 is held between holding members 7, 7 connected to lead-out terminals 6, 6 implanted in the base 5, holding members 7, 7 are formed. The terminals 4, 4 are bonded together with a conductive adhesive, and the frequency of the crystal piece 2 is extracted to the outside via the terminals 4, 4, holding members 7, 7, and lead-out terminals 6, 6.

By the way, the frequency of the crystal resonator 1 described above depends on the shape and size of the crystal piece 2 or the excitation electrodes 3, 3,
Although it is determined by the quality and quantity of the terminals 4, 4, simply depositing a predetermined amount of a predetermined substance on a crystal piece 2 of a predetermined shape will not result in a predetermined reference frequency.
It is difficult to obtain a crystal resonator with _0. Therefore, the conventional crystal resonator 1 has an additional minute amount of silver on the excitation electrodes 3, 3 of the crystal resonator 1, as explained below. , aluminum, gold, etc. are continuously deposited several times, and the point where the frequency ₁ , which changes due to the deposition, becomes equal to the reference frequency ₀ , is stopped, and the crystal oscillation with the reference frequency ₀ is determined. Child 1 is obtained.

A conventional frequency adjustment device will be described below with reference to FIGS. 2 to 6. As shown in FIG. 2 or 3, a plurality of unadjusted crystal resonators 1 (10 to 15) are stored in trays 8, 8' for storage purposes. In the third illustration, the crystal oscillator 1 is placed on a tray 8' via individual storage stands 9.
It is stored in.

When adjusting the frequency, tray 8,
The crystal vibrations 1 on 8' are replaced one by one into the terminal insertion parts 11, 11 provided on the turntables 10, 10' provided in a vacuum storage chamber (not shown) or into the storage hole 11' of the storage stand 9, and then , the turntables 10, 10' are intermittently rotated, and the evaporation sources 12, 1
2', a minute amount of a substance such as silver, aluminum, or gold is deposited on the excitation electrode 3 of the facing crystal oscillator 1, and the frequency ₁ of the crystal oscillator 1 becomes the reference frequency _0.
Vapor deposition is carried out in several steps until the The reason why the evaporation is carried out in several parts is to prevent the reference frequency from exceeding ₀ in the middle of the evaporation if the evaporation is carried out at once.In general, the second evaporation is performed in an even smaller amount than the first one. Then, in the third time, an even smaller amount of vapor deposition is performed, and in many cases, the reference frequency reaches ₀ during this third vapor deposition.

Also, whether or not the reference frequency ₀ has been reached can be determined by connecting the lead-out terminals 6, 6 of the crystal oscillator 1 to be adjusted to an oscillation circuit (not shown), and passing the reference frequency ₀ through the oscillation circuit. All that is required is to detect it.

After the adjustment, the vacuum state in the vacuum storage chamber is released, and the crystal resonator 1 is stored in the trays 8 and 8' again.
Again, from other trays 8, 8', other crystal units 1
, and perform the same work.

By the way, in the case of the above-mentioned adjustment device, the crystal units 1 stored in the trays 8 and 8' are taken out one by one and placed on the turntables 10 and 10' in the vacuum storage chamber.
, and after adjustment, it is stored again in the trays 8 and 8', which not only makes it inefficient and difficult to make large amounts of adjustment, but also because the crystal oscillator 1 has to be put in and out a lot during the process. There were drawbacks such as damage to the crystal resonator 1.

In view of the above points, the present invention is designed to perform adjustment without taking out the crystal resonator 1 from the tray, improving work efficiency and preventing damage to the crystal resonator 1. The purpose is to provide.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. Incidentally, since the crystal resonator 1 according to the present invention is also the same as the conventional example, the same reference numerals will be used and the details will be omitted.

FIGS. 7A and 7B show one embodiment of the tray 20 used in the present invention, with FIG. 7A being a front view and FIG. 7B being a side view. As is clear from the figure, a plurality of (approximately 10 to 15) crystal units 1 are housed on the tray 20, and for storage purposes, lead-out terminals 6, 6 are provided on the top surface of the tray 20, although not particularly shown. An insertion hole is provided, and rack gears 21, 21 for meshing with gears 25, 31, which will be described later, are provided at the lower portions of both sides thereof.

FIG. 8 is a plan view showing the frequency adjustment device, and FIG. 9 is a sectional side view of the same portion. In the figure, reference numeral 22 denotes a vacuum storage chamber, which is made into or released from a vacuum by appropriate means. Reference numeral 23 denotes a turntable disposed within the vacuum storage chamber 22, and the turntable 23 is intermittently rotated by a motor 24 by a predetermined amount (1/16 rotation in the embodiment). Also, near the circumference of the turntable 23, there are
Sixteen holes 23a, 23b...23p are provided. The turntable 23 can accommodate 16 of the trays 20 described above. A feed gear 25 meshes with a rack gear 21 provided on the side surface of the tray 20 housed on the turntable 23. When the turntable 23 is positioned at a predetermined position, the feed gear 25 is inserted into the hole 23a by any means. The tray 20 protrudes from one of the trays 23p and rotates by a predetermined amount by the rotation of the motor 26.
is intermittently moved toward an adjustment section 29, which will be described later. Note that 27 is a gear provided on the motor 26, and 28 is an intermediate gear. 29 is crystal oscillator 1
an adjustment section for adjusting the frequency of the adjustment section 2;
Reference numeral 9 has a size that can accommodate one of the trays 20, and includes an evaporation source 30 for depositing a minute amount of a metal substance such as silver, aluminum, or gold on the excitation electrode 3 surface of the crystal resonator 1, and an adjustment section 29. A return gear 31 is provided for returning the removed tray 20 to the original turntable 23. 32 is gear 31
This is a motor for rotating.

Next, frequency adjustment of the crystal resonator 1 in the adjustment device will be explained. First, vacuum storage chamber 2
The upper cover (not shown) of 2 is opened, and a tray 20 containing a plurality of crystal resonators 1 is stored in a predetermined position and in a predetermined amount (up to 16 in the embodiment). After storage, the upper cover is closed and the storage chamber 22 is placed in a vacuum state. Thereafter, the motor 24 is rotated by a predetermined amount to cause one of the trays 20 to face the adjustment section 29. When the tray 20 faces the adjustment part 29, the turntable 23 stops rotating and the feed gear 25 rises from the hole 23a of the turntable 23.
It meshes with the rack gear 21 of the tray 20. Then, by rotating the motor 26 by a predetermined amount, a minute amount of metal material is evaporated from the evaporation source 30 onto the excitation electrode 3 surface of the first one of the crystal oscillators 1, and then the next crystal oscillation is performed. When the last one in the tray 20 is finished, the return gear 31 in the adjustment section 29 and the feed gear 2
5 rotates in the opposite direction to return the tray 20 to its original position. When the tray 20 returns, the feed gear 25 descends,
The turntable 23 is rotated by a predetermined amount again, the next tray 20 is made to face the adjustment section 29, and the crystal resonator 1 in the tray 20 is vapor-deposited in the same manner as described above. When the vapor deposition is repeated in this manner and the turntable 23 is rotated once, the first pre-adjustment of the crystal resonators 1 in each tray 20 is completed. In addition, in the above-mentioned operations, the rotation start and stop of the turntable 23, the raising and lowering of the feed gear 25, the start and stop of rotation, the start and end of vapor deposition, the start and stop of rotation of the return gear 31, etc. are not particularly illustrated. However, it can be easily controlled by using a microcomputer using sensors, etc.

When the first time is completed, the voltage of the evaporation source 30 is changed to make the amount of metal substance evaporated a much smaller amount than the above, and the same operation is repeated again to perform the adjustment. Of course, a crystal resonator 1 having a reference frequency of ₀ may be created by the first or second adjustment. Finally, the final adjustment is made by further changing the voltage of the evaporation source 30 to make the amount of metal material evaporated even smaller and repeating the same operation as described above. It has a frequency of ₀ . When the adjustment is completed, the vacuum state in the vacuum storage chamber 22 is released, the upper cover is opened, and the tray 20 is taken out.

That is, according to the above method, the turntable 2
The frequency of the crystal resonator 1 can be adjusted by rotating the oscillator 3 two to three times.

FIG. 10 shows another embodiment of the present invention, and as is clear from this figure, three adjustment portions 29a, 29b, and 29c are provided at equal intervals. Of course, each adjustment section 29a, 29b, 29c is provided with evaporation sources 30a, 30b, 3 as in the first embodiment.
0c, a return gear 31a (others not shown) are provided, and in particular, the relationship between the evaporation amounts of the evaporation sources 30a, 30b, and 30c is 30a>30b>30c, and 30a is used for pre-adjustment, and 30b is used for intermediate adjustment. Adjustment, 30
The final adjustment is made at step c. This allows all adjustments to be made with one rotation of the turntable 23, and three positions can be worked at the same time by one stop of the turntable 23. High efficiency. Of course, the adjustment parts 29a, 29b, 29
It goes without saying that there is a feed gear at the position facing c, and adjustments are made in the order of front, middle, and final.

In addition, in the first and second embodiments, the tray 2
The number of adjustment units 29 to be stored in the turntable 23 is set to 16, but it is not necessarily limited to 16, and the number of units to be stored is a matter of design and work discretion. I set it to 1 or 3, but
This is also arbitrary without limitation, and furthermore, although the motors 24, 26, and 31 were used to rotate the turntable 23 and transport the tray 20, the motors are not limited to the motors, and for example, a solenoid plunger or the like may be used. It is okay to use.

As explained above, according to the present invention, in the frequency adjustment device for a crystal resonator that adjusts the frequency by depositing a minute amount of metal material on the surface of the crystal resonator 1, the vacuum storage chamber 22, the vacuum storage chamber A plurality of trays 2 storing a plurality of crystal units 1 in the tray 22
a turntable 23 for intermittently transferring 0, a means for pulling out the trays 20 on this turntable 23 one by one, and a means for pulling out the trays 20 on this turntable 23 one by one;
means 30 for sequentially depositing a minute amount of metal on the surface of each crystal oscillator 1 housed in the quartz crystal oscillator 1;
Since the frequency adjustment section 29 consisting of means for detecting the frequency change of the crystal resonator 1 is provided, the reference frequency of the crystal resonator 1
To adjust to ₀ , there is no need to take out the crystal units 1 one by one from the tray 20 as in the conventional case.
0, which not only significantly improves work efficiency, but also eliminates the need to touch the crystal oscillator 1, prevents damage to the oscillator during frequency adjustment. In addition, it is possible to reliably store a large number of crystal units 1 at a time without releasing the vacuum state in the vacuum storage chamber.
This has the effect of allowing adjustments to be made.

Furthermore, if a plurality of adjustment parts 29a, 29b, and 29c are provided as in the second embodiment of the present invention, adjustment can be made at several places at the same time, resulting in even higher efficiency.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the structure of the crystal resonator 1, Figs. 2 to 6 show a conventional example, Fig. 2 shows the first tray 8, Fig. A is a front view, and Fig. B is a side view. Figures 3 and 3 show the second tray 8', Figure A is a front view,
B is a side view, FIG. 4 is a front view of the adjusting device, FIG. 5 is a plan view of the same, FIG. 6 is a plan view of adjusting devices of other shapes, and FIGS. An example is shown, FIG. 7 shows the tray 20, and FIG.
Figure 8 is a side view, Figure 8 is a plan view of the adjustment device, Figure 9 is a side view.
The figure is a sectional side view of the same part, and FIG. 10 is a plan view showing another embodiment. 1...Crystal resonator, 20...Tray, 22...
Vacuum storage chamber, 23... Turntable, 25...
Feed gear, 29...adjustment section, 29a, 29b, 2
9c... Adjustment section, 30... Evaporation source, 30a, 30
b, 30c... Evaporation source, 31... Return gear, 31
a, 31b, 31c...Return gear.

Claims (1)

[Scope of Claims] 1. A frequency adjustment device for a crystal resonator that adjusts the frequency by depositing a minute amount of metal material on the surface of the crystal resonator, which includes a vacuum storage chamber and a plurality of crystal oscillations within the vacuum storage chamber. a turntable for intermittently transporting a plurality of trays containing children; and means for pulling out the trays on the turntable one by one;
It is characterized by comprising means for sequentially depositing a minute amount of metal on the surface of each crystal resonator housed in the pulled-out tray, and means for detecting frequency changes of each crystal resonator. Crystal oscillator frequency adjustment device. 2. The frequency adjustment device for a crystal resonator according to claim 1, wherein a plurality of means for pulling out the tray and means for depositing metal are provided in the vacuum storage chamber.