JPS5828926B2 - Suishiyo Shindoushi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support structure for a tuning fork type crystal resonator body in a crystal resonator to a closed container.

An object of the present invention is to make the mounting of the vibrator body easier by arranging the member supporting the vibrator body on the airtight terminal in advance, and to downsize the crystal vibrator by simplifying the structure. .

A crystal resonator using a conventional tuning fork type crystal resonator body is shown in FIGS. 1 and 2.

In FIG. 1, a vibrator body 1 is fixed to an airtight terminal 4 via support wires 2 and 3.

In addition, in FIG.
However, the shape of this support member requires high precision, and wiring work is required to electrically connect the electrodes formed on the surface of the vibrator body 5 and the lead wires 8 of the airtight terminals 7. In either structure, mounting the vibrator body inevitably requires complicated work, and partial manufacturing and mounting pose many problems in terms of quality and cost.

Further, depending on the shape of the support member or one method of attachment, wasted space is created in the crystal resonator, which is a major obstacle to miniaturization.

The crystal resonator of the present invention solves the above-mentioned problems, and its basic structure will be explained based on the embodiments shown in FIGS. 3 and 4. Plate members 'IIA and 11B arranged on the terminal 10
After fine adjustment of the frequency, the sealed container 15 and its lid 16 are placed under vacuum at the flange portions 17 and 18 of both members.
They are welded together by pressure.

The crystal resonator is fixed to the watch body by means of the lead wires 12A and 12B of the airtight terminal 10 and a grounding pin 19 which is conveniently placed and fixed in advance to the airtight container 15.

The vibrator body 9 in the present invention is the plate member 11 of the airtight terminal 10.
Electrodes are formed at portions 9' corresponding to the vibrator support portions 11A' and 11B' of A and IIB so as to support and electrically connect them.

The airtight terminal 10 includes a frame 13, a glass 14, and a lead wire 12A.
.

12B and a plate member 11A that supports the vibrator body 9.

11B, and the plate members 1'lA and 11B are ``-
In one direction perpendicular to each of the lead wires 12A and 12B, the two members are overlapped in plan, while having an appropriate clearance between the two members in cross section.

Further, the gap between the vibrator body support portions 11A' and 11B' of both members is set to the thickness of the vibrator body that sandwiches the vibrator body 9 therebetween.

The lead wires 12A, 12B and the plate members 11A, 11B are simultaneously brazed during the manufacturing process of each airtight terminal 10, and the plate members 11A, 11B and the frame 13 are electrically separated by the glass 14.

The planar shape and thickness of the plate member are set to dimensions that sufficiently satisfy the fixing strength of the vibrator body support and the performance of the crystal resonator without vibration leakage, and the plate member 11B is designed to have no waste in the thickness direction with respect to the sealed container 15. In order to eliminate the space, a suitable step is bent and caroused, and the frame 1 of the airtight terminal as shown in Fig. 5 is made.
If a partial cut 20 is provided in 3, it is possible to shorten the longitudinal dimension of the vibrator body.

Furthermore, after brazing the airtight terminal 10 to the airtight container 15 to maintain airtightness, if solder or a low melting point brazing material is applied to the plate members 11A and 11B in advance by plating or the like, the resonator body can be attached. The work is extremely easy.

According to this structure, these plate members can be simply pressed by pressing or the like, and the shape and dimensions do not require conventional precision.

In addition, the above-mentioned resonator body mounting work can be done at the same time as electrical bonding in the same process, eliminating the need for conventional work such as wire bonding to connect the resonator body and lead wires. This has the advantage of making it possible to reduce the size and thickness of the device and significantly reduce manufacturing costs.

The constituent members of the vibrator body 9 and the airtight terminal 10 are in a sealed container 15.
and is accommodated by its lid 16.

Both members are thin and have an oval planar shape, and are easily formed from a flat plate by press working, and the flanges 17 and 18 are joined and sealed using a cold pressure welding machine or the like while maintaining a vacuum inside the container. Ru.

A grounding pin 19 is fixed to the sealed container 15 by welding or brazing to avoid harmful electric fields to the resonator body 9, and the lead wire 12A of the airtight terminal is used to attach the crystal resonator to the electronic circuit after sealing. and 12B, and an appropriately placed grounding pin 19 which also serves as an electrical circuit connection.

The present invention provides a crystal resonator housed in a flat airtight container and lid, and by configuring the resonator body and airtight terminals as described above, the crystal resonator can be made smaller, thinner, and less expensive to manufacture without impairing its performance. The purpose of this invention is to provide an ultra-small, thin, and inexpensive crystal oscillation wristwatch.

The present invention can be applied not only to watches but also to general-use crystal oscillators.

[Brief explanation of drawings]

1 and 2 are general views of a conventional crystal oscillator, FIG. 3 is a plan view of a crystal oscillator according to an embodiment of the present invention with the lid removed, and FIG. 4 is a sectional view thereof. FIG. 5 is a schematic diagram of a frame of an airtight terminal according to an embodiment of the present invention. Name of drawing number, 1.5.9... Vibrator body, 2
゜3... Support wire, 4, 7.10... Airtight terminal, 6... Support plate, 8, 12A, 12B...
...Lead wire, 11A, 11B...Plate member,
13... Frame of airtight terminal, 14... Glass, 15... Airtight container, 16... Lid of airtight container, 17.18... ...Flange, 19...
...Grounding pin, 20...Notch in airtight terminal frame.

Claims (1)

[Claims] 1. Each of the two concave containers formed from a flat plate by press working has a flange portion on the outer periphery, and the tuning fork crystal resonator in the container is sealed by cold-pressing the flange portions while maintaining a vacuum. One of the recessed containers has an airtight terminal at the bottom, and a plate member for supporting a crystal resonator is connected and fixed to each of two lead wires passing through the airtight terminal, and the two lead wires are connected to each other. The two plate members are fixed to sandwich the base of the tuning fork crystal resonator arranged parallel to the bottom of the container, and are configured to support and conduct the lead wire and the tuning fork crystal resonator. crystal oscillator.