JPS5852367B2 - Support structure of contour piezoelectric vibrator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support structure for a contour piezoelectric vibrator.

Conventionally, as shown in Figures 1 and 2, in order to mechanically and electrically connect contour piezoelectric vibrators, silver paste was baked on the vibrator's 10 nodes, and elastic electric wires 2 were attached to this. A method of joining with solder 3 or pressing a needle 4 against the joint was used.

However, these methods have the following problems.

(a) Silver paste spreads on the crystal resonator board and adversely affects vibration.

(b) It is extremely susceptible to shock, making it particularly difficult to use as a time standard for watches and the like.

(c) Assembling requires a lot of man-hours and time, and the work is not easy.

The purpose of the present invention is to solve the above-mentioned problems, and to reduce the number of man-hours and time required for assembly when mechanically and electrically supporting a contour piezoelectric vibrator, to facilitate the work, and to improve impact resistance. It is to let.

The present invention will be explained below with reference to the drawings. FIG. 3 shows a contour shear resonator using a quartz crystal as an example, and X, Y and 2 represent the electric axis, mechanical axis and optical axis, respectively.

The crystal resonator is taken out from a Y plate rotated by an angle α0 around the X axis.

Assuming that the clockwise direction is a positive angle, α is 150° to -55° for a DT cut transducer, and 35° to 40° for a CT cut transducer.
Selected in the range 0.

FIG. 4 shows a crystal resonator of the present invention, and FIG. 5 shows an embodiment of its support.

In FIG. 4, a mechanically or chemically modified hole 5 which is sufficiently small compared to the size of the crystal oscillator is provided at the node of the crystal oscillator, as shown in FIG. The crystal resonator is supported by inserting a support into the hole 5 of the crystal resonator.

The embodiment shown in FIG. 5 will be explained.

The surface of the contour slip oscillator 10 is coated with electrodes 10a by vapor deposition or the like.
, 10b are attached, and each becomes a positive side and a negative side to cause the crystal resonator to oscillate.

The terminals on the outside of the crystal resonator case 7 are connected to the supports 6a and 6.
b, directly or indirectly, so that the supports 6a and 6b do not come into contact with each other when assembled as shown in FIG.

The supports 6a and 6b are made of a conductive member and are insulated so as not to be electrically conductive with each other.
6b has steps 9a and 9b, which sandwich the crystal resonator 1, positioning and supporting the crystal resonator 1, and at the same time electrically coupling the crystal resonator 1 by contacting with the electrode films 10a and 10b. , and are bonded on each side by conductive adhesive 11 to ensure electrical connection.

If the steps 9a and 9b provided on the supports 6a and 6b are too large, they will have an adverse effect on the crystal oscillator 1, so they should be one-fourth or less of the diameter of the hole 5 of the crystal oscillator 1. Take.

FIG. 6 shows another embodiment.

In this example, there is only one support 6. The support 6 is made of a non-conductive material, and the portion 13a is plated with gold or the like, and is electrically connected to one electrode film 10b by a conductive adhesive 11.The plated portion 13a of the support 6
is electrically connected directly or indirectly to an external terminal.

Further, the part 13a of the support 6 has no insulation applied to its surface and maintains insulation, and is connected to the other electrode film 10 by the member 14 electrically connected to the external terminal and the conductive adhesive 11.
a is connected to an external terminal.

Therefore, when a power source is connected to the external terminal, the electrode film 10 a
, 10b are each charged with a different polarity and cause the crystal resonator 1 to oscillate.

FIG. 7 also shows another embodiment.

The support body 6 is a crystal of the same cut as the crystal resonator, and the crystal resonator 1 and the support body 6 are tightly fitted and integrated.

Since the support body 6 and the vibrator 1 have the same cut and therefore have the same coefficient of thermal expansion, stress changes due to thermal changes do not change.

Electrodes 14a and 514b are separately attached to both ends of the support body 60, and the electrode film 1 of the crystal resonator 1
External terminals and electrodes 14a and 14 that are electrically coupled to crystal case 7 and the like are electrically connected to 0a and 10b.
b may be electrically coupled directly or indirectly.

Mechanical coupling between support 6 and crystal resonator 1 and support 6
In order to ensure electrical coupling between the electrodes 14 a + 14 b attached to the electrode films 10 a and 10 b,
The support 6 and the crystal resonator 1 are bonded together by a conductive adhesive 11.

Both ends of the support body 60 are fixed by a crystal case 7 or the like.

In this example, the support 6 does not have steps, so positioning is difficult, but since the crystal resonator and the support are combined before being set in the crystal resonator case, positioning is not so difficult, and the positioning is not so difficult. It is also easy to install.

In the embodiment shown in FIG. 8, the electrode 1 that causes the crystal resonator 1 to oscillate
5a and 1sb are not in contact with the crystal resonator 1.

Electrode 15a. Although 15b is attached to the crystal resonator case 7 or the like, the crystal resonator case 7 may be used as an electrode.

Electrodes 15a and 15b are connected to external terminals and are charged with opposite polarities.

Although the above description has been made regarding a contour vibrator, the contour vibrator also includes a vibrator on the other side, and the present invention relates to a contour vibrator including this vibrator.

Further, although the embodiments have been described using crystal vibration as an example, the present invention is not limited to this, and includes all crystal piezoelectric vibrators such as lithium tank crystals.

As described above, in the present invention, the piezoelectric vibrator is supported by inserting the support into the hole provided in the support, so the work is simple and time-saving, and the yield is greatly improved. The stepped steps allow for accurate positioning.

It is also resistant to impact and is particularly effective when used under adverse conditions, such as in watches.

Furthermore, since electrodes for vibrator excitation or conductive parts for electrode leads can be easily attached to the support, there is an advantage that the vibrator unit can be made smaller.

[Brief explanation of the drawing]

1 and 2 are perspective views showing a conventional method of supporting a contour piezoelectric vibrator, FIG. 3 is a diagram showing the cutting angle of the contour piezoelectric vibrator, and FIG. 4 is a diagram showing the contour piezoelectric vibrator of the present invention. The perspective view and FIGS. 5 to 8 are cross-sectional views showing embodiments of the support structure of the present invention. 1... Crystal oscillator, 5... Hole, 6...
...-Support, 7...Crystal resonator case,
9a, 9b---stepped portion, 10a, 10b・
...Metal electrode film, 11... Conductive adhesive.

Claims (1)

[Claims] 1. A contour piezoelectric vibrator, characterized in that the vibrator has a hole at its node that is sufficiently small compared to its size, and is supported by inserting a support into the hole. Support structure of contour piezoelectric vibrator. 2. A support structure for a contoured piezoelectric vibrator according to claim 1, wherein the hole insertion portion of the support body is formed thinner than the other portions to form at least one step to position the vibrator. 3. The support consists of one or more members, and is mechanically and
A support structure for a contoured piezoelectric vibrator according to claim 1, which is electrically connected. 4. A support structure for a contoured piezoelectric vibrator according to claim 1, wherein the support body is made of a material having substantially the same coefficient of thermal expansion as the vibrator. 5. A support structure for a contoured piezoelectric vibrator according to claim 1, wherein the support body is integrally provided with at least one electrode or a conductive part for an electrode lead for causing the vibrator to oscillate.