JPS5854716A - Dip type piezoelectric oscillator - Google Patents

Abstract

PURPOSE:To improve the vibration-resistance and to obtain DIP type arrangement of lead terminals, by insert-holding a lead frame of a piezoelectric oscillation element with spacers, and coupling the frame with a glass of low melting point. CONSTITUTION:A piezoelectric oscillation element 7 is supported with lead frames 8, 8', which are inserted and held with two ceramic-made spacers 9, 9' having a larger window than the element 7 and located so that the oscillator 7 can be positioned at the center of the window of the spacers 9 and 9'. The lead frames 8, 8' and the spacer 9, 9' are bonded with a low melting point glass 10. The outside of the window of the spacers 9, 9' is sealed with resin and ceramic plates 11 and 11'.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a DIP type (dual in-line package) piezoelectric vibrator.

Filters traditionally used in communication electronic equipment, etc.
A piezoelectric vibrator, which is an application of a piezoelectric vibrating element, is used in a resonant circuit or the like. As shown in FIG. 1, this piezoelectric vibrator conventionally has electrodes 2 and 2' formed on both sides of a substrate 1 made of a monoelectric material, and a lead-out portion of the electrode 4. 4', and the outside is covered with a case 5, which is joined to the paste 3 and sealed. In order to reduce the height of this piezoelectric vibrator configured as J: when it is assembled into a circuit, the lead terminals 6 and 6' are bent by 90 degrees and the case 5 is placed on a printed board (H). If mounted in this way, the mounting pins 4 and 4' that support the board will be horizontal, resulting in poor vibration resistance and causing damage.
When used together with C), there is also the drawback that the mounting pitch dimensions of the lead terminals are different. It is an object of the present invention to eliminate these drawbacks and provide a piezoelectric vibrator which has excellent vibration resistance and whose terminals are integrated circuits.

For this reason, in the I) I P type piezoelectric vibrator of the present invention, the piezoelectric vibrating element supported by the lead frame is separated from the lead frame by two spacers that have a smaller window than the vibrating element. The main feature is that the spacer is bonded in the center with low-melting glass from an art dealer, and the outer surface of the window portion of the spacer is sealed with a resin or ceramic plate.

Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

FIG. 2 shows a first embodiment. In the figure, numeral 7 is a piezoelectric vibrating element, 8.8' is a lead frame that also serves as a terminal, and 9
．． 9' is a spacer, 10 is a low melting point glass, 11.11'
is a resin or ceramic plate.

FIG. 3 is a new view taken along the Ill--Ill line in FIG. The piezoelectric vibrator 7 is sandwiched between two ceramic spacers 9 and 9' having a window thicker than the spacer 9.
．． The lead frame 8.8' and the spacer 9.9' are placed in the center of the window section 9'.
It is joined by this. Further, the outside of the window portion of the spacer 9.9' is sealed with a resin or ceramic plate 11.11'.

This embodiment configured in this manner is advantageous in terms of vibration resistance because the length of the lead frame from the spacer to the piezoelectric vibrating element can be shortened, and terminals can be provided on both sides of the spacer. Therefore, it is possible to use a DIP type.

Next, a perspective view of the second embodiment is shown in FIG.
A cross-sectional view along the line is shown in FIG. This embodiment is suitable for an Rf converter that uses two vibrators in one circuit, and is suitable for any Rf converter that uses two piezoelectric vibrators in one circuit.
7' beam 1/-m 8° 8' and 8a, 8'a are each supported by IQ+, and the lead frame 8
, 8'&j space type (l, I)/(1 strand, lead frame 8a, 8'al, spacer 9' and 9
"Hokuden vibrator 7.
7' are partially overlapped (however, the gap between the elements is filled with spacer 9)
There is a length of '. ) Spacer window F'; 1 in B
Lead frames 8 and 8' are formed into valleys.

8a, 8'a and spacers 9.9', 9'' are bonded to the low melting point glass 1.0.10'.
or sealed with a ceramic plate 11.11' -C3,
The real #fj example fL−” configured in this way:, Ai+
In addition to having the same effects as those of the embodiment, the present invention has an advantage of mounting two piezoelectric vibrating elements in a much larger volume than the +''+ii embodiment.

Next, a third embodiment will be shown with a perspective view in FIG. 6 and a sectional view in FIG. 7. This embodiment has two piezoelectric vibrating elements mounted in the same way as the second embodiment, but if it is different, one vibrating element 7 is turned over compared to the other vibrating element 7'. . With this configuration, even if the two sets of lead frames 8, 8' and 8a, 8'a are on the same plane and are sandwiched between the spacers 9 and 9', there is a gap equal to the thickness of the lead frames between the vibrating elements. Therefore, the structure is simpler than the second embodiment since it requires one less spacer.

Note that the effect is exactly the same as the second embodiment.

As explained above, the DIP type piezoelectric vibrator of the present invention has high vibration resistance by sandwiching the lead frame of the piezoelectric vibrating element with spacers and bonding with low melting point glass, and has a DIP type piezoelectric vibrator with a lead terminal arrangement. This makes it possible to do this.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an example of a conventional piezoelectric vibrator, FIG. 2 is a perspective view of a DIP type piezoelectric vibrator according to the first embodiment of the present invention, and FIG. 4 is a perspective view of the second embodiment, FIG. 5 is a sectional view taken along line V-v in FIG. 4, FIG. 6 is a perspective view of the third embodiment, and FIG. Q-1 is a sectional view taken along line V)111--■ in FIG. 6. 7.7'...piezoelectric vibration element, 8.8', 8a, 8'a
...Lead frame, 9.9', 9'...Spacer,
10°10'...Low melting point glass, 11.11'...]
☆↑ Grease board or ceramic board. Patent applicant Fujitsu Limited Patent agent Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney Yukio Akira Yamaguchi (11) Figure 6 Figure 7

Claims (1)

[Claims] 1. A piezoelectric vibrating element supported by a lead frame is sandwiched between two spacers each having a window extending from the vibrating element from both sides of the lead frame, and the outer surface of the window of the spacer is bonded with low melting glass. A DIP type piezoelectric vibrator characterized by being sealed with a resin or ceramic plate.