JPH0453055Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Object of the Invention> [Industrial Field of Application] The present invention relates to a piezoelectric vibrator having a spacer attached thereto to float the piezoelectric vibrator above a printed circuit board.

[Prior art] A piezoelectric vibrator is made by fixing a piezoelectric diaphragm to a support on a base having a flange on the periphery, fitting a cap with a flange, and performing resistance welding or cold pressure welding to hermetically seal the base. You can get it. When this piezoelectric vibrator is fixed to a printed circuit board or the like, there is a risk of short-circuiting the wiring on the printed circuit board because the piezoelectric vibrator is made of metal. Further, in order to evenly fix the lead terminals to the through holes formed in the thickness direction of the printed circuit board with solder, it is necessary to float the piezoelectric vibrator above the printed circuit board. For this reason, in the past, an insulating glass button was placed on the bottom surface of the piezoelectric vibrator and floated above the printed circuit board.

However, as piezoelectric vibrators have become smaller, there is no place to attach a glass button to the bottom surface of the piezoelectric vibrators, making it difficult to float the piezoelectric vibrators easily.

[Problems to be solved by the invention] The invention solves the problem that as piezoelectric vibrators become smaller, there is no space to attach a glass button to the bottom of the piezoelectric vibrator, and the piezoelectric vibrator cannot be easily floated above the printed circuit board. Ta.

[Purpose of the present invention] The present invention allows a piezoelectric vibrator to be miniaturized and easily floated above a printed circuit board even if there is no space to provide a glass button on the bottom surface of the piezoelectric vibrator.

<Structure of the invention> [Means for solving the problem] In order to achieve this objective, the present invention provides a piezoelectric vibrator in which a base and a cap having a flange portion on the periphery are hermetically sealed and a spacer is attached, and the spacer is placed opposite to each other. The piezoelectric vibration device has a pair of frame parts, the corners of the frame part are connected to the corners of the other frame part at the upper part of the flange part, respectively, to make one body, and the flange part is held between the slits of the frame part. It is a child.

[Operations and Examples] FIG. 3 is a perspective view showing a state before the spacer 20 is attached to the piezoelectric vibrator 10 of the present invention.

The piezoelectric vibrator 10 has a cap 11 having a flange portion 13 on its periphery and a base 12 that are fitted together and hermetically sealed by resistance welding, cold pressure welding, or the like. Inside, a piezoelectric diaphragm is fixed to a support. On the other hand, the spacer 20 has a slit 1 slightly wider than the thickness of the flange 13 in order to sandwich the flange 13.
A pair of frame portions 14 each having 6 are provided facing each other,
The connecting portion 1 connects the corner of the frame 14 to the corner of the other frame 14'.
It is connected by 5 and made into one. In addition, the connecting portion 15 is wider than the other portions and provided with a claw portion 151 in the center to hold the flange portion 13. In this way, the width dimensions of the connecting portions 15 are varied to provide elasticity.

FIG. 1 is a perspective view of the piezoelectric vibrator 10 of FIG. 3 when a spacer 20 is fitted and fixed.
FIG. 2 is a plan view of FIG. 1.

In this way, the spacer 20 is inserted from both ends of the flange portion 13 of the piezoelectric vibrator 10 into the slit 1 of the frame portion 14.
6 is something that gets stuck in. Connecting part 15
Because it has elasticity, it expands slightly when inserted, making it easy to fit it in. As a result, the piezoelectric vibrator can be lifted above the printed circuit board by the thickness of the lower part of the frame portion 14. Moreover, as can be seen from the plan view of FIG. 2, this spacer 20
Except for the corner portions, the external dimensions of the piezoelectric vibrator 10 including the flange portion 13 are not increased, and the piezoelectric vibrator 10 is compact and can be easily floated. In addition, a claw portion 15 provided at the center of the connecting portion 15
1 may be used to press the upper surface of the flange portion 13, but the frame portion 1 facing the flange portion 13
Since it can be securely fixed by the slits 16 of No. 4, the positional accuracy is high, and it may be a simple connecting portion with a uniform width dimension. FIG. 4 is a perspective view of a spacer 30 showing another embodiment. As described above, the connecting portion 25 does not have a claw portion.
Further, a slope 27 is provided on the opposing surfaces of the opposing frame portions 24 so as to widen downward.
When the spacer 30 is fitted into the piezoelectric vibrator 10 of FIG. 3 from above, the slope 27 comes into contact with the flange portion 13 as a guide, and the flange portion 13 is further held in the slit 16 by a force from above. This slope 27 makes the spacer 30 very easy to use. Furthermore, the piezoelectric vibrator 10 can be easily attached to the spacer 20 by simply fitting it into the spacer 20 without using an adhesive or the like.
It turned out to be very convenient.

In addition to crystal oscillators, piezoelectric oscillators include piezoelectric ceramics and lithium tantalate. Furthermore, the piezoelectric vibrator may be a piezoelectric vibrator including an oscillation circuit. Further, the material may include resin as an insulating material.

<Effects of the invention> In the present invention, the piezoelectric vibrator is easily floated above the printed circuit board by fitting the flange portion of the piezoelectric vibrator into the slit in the opposing frame portion of the spacer. Even objects with small spaces where buttons could not be installed could be easily floated. Further, there is an advantage that the external dimensions including the flange portion are not increased.
Furthermore, even when cleaning the lead terminals after soldering, since only the bottom end of the piezoelectric vibrator was used as the spacer, cleaning could be carried out sufficiently. In addition, the spacer is not fixed with an adhesive or the like, but can be easily lifted from the printed circuit board by simply fitting it in, making it very convenient.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a piezoelectric vibrator equipped with a spacer of the present invention. FIG. 2 is a plan view of the piezoelectric vibrator shown in FIG. 1. FIG. 3 is a perspective view of a piezoelectric vibrator and a spacer. FIG. 4 is a perspective view of the spacer. 10...Piezoelectric vibrator, 13...Flange part, 1
4, 14, 24'... Frame portion, 15, 25... Connection portion, 20, 30... Spacer.

Claims (1)

[Scope of utility model registration request] In a piezoelectric vibrator in which a base with a flange on the periphery and a cap are hermetically sealed and a spacer is attached, the spacer has a pair of opposing frames, and the corner of the frame is connected to the other frame at the top of the flange. A piezoelectric vibrator characterized in that the corners of the piezoelectric vibrator are connected to each other by connecting portions so as to be integrated, and the flange portion is held between the slits of the frame portion.