JPS5850645Y2 - Tuning fork crystal unit - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vibrator unit having a tuning fork type crystal vibrator in a container.

Since tuning fork type vibrators are relatively small as low frequency vibrators, they are used in portable electronic equipment, such as time standards in watches, filters in selective calling devices, and the like.

Conventionally, tuning-fork crystal resonator units have adopted a structure in which the resonator is suspended by support wires inside the case, or a structure in which the resonator is fixed to an insulating fixture and electrical connections are made using wire bonding. Since both of them use wire rods, further miniaturization is difficult, and the structure is complicated, resulting in high manufacturing costs.

Furthermore, with the former structure, accidents such as the tip of the vibrator colliding with the inner wall of the case and being damaged or the support wire coming off when subjected to an external shock were not a good thing.

The present invention aims to eliminate the above-mentioned drawbacks, and provides a tuning fork type crystal resonator unit that has a simple structure, is easy to downsize, and has excellent impact resistance.

Next, the present invention will be explained based on examples.

In FIGS. 1 and 2, 1 is a tuning fork type crystal resonator, and a pair of grooves 1a and 1b are provided near the base of the resonator.

Reference numerals 2 and 3 indicate terminal pins with bent tips, and these terminal pins are fixed to the same plane of the tuning fork base.

That is, the pair of divided electrodes of the tuning fork 1 are drawn out on the same plane of the tuning fork base, and the two terminal pins 2 and 3 are directly fixed to the electrode lead terminal of the - mark, thereby establishing an electrical connection. It also serves as support.

4 is an insulating sealant such as glass for sealing the opening of the case, and the two terminal pins 2 and 3 pass through this sealant 4 and are fixed.

5 and 6 are the lower case and upper case, respectively;
This constitutes the entire case that covers the tuning fork type crystal resonator 1.

In accordance with the above embodiment, the grooves 1a and 1b provided on the side surface of the base of the crystal resonator, in the case of a relatively thick tuning fork type resonator,
This is to prevent reduction in resonance sharpness due to complete rigid support.

In this case, the part 1c will not be able to resist the tuning fork 1 against any impact.
It is necessary to maintain rigidity to the extent that the tip does not hit the inner wall of the case.

In cases where the influence of rigid body support is small, such as in a thin crystal resonator, such a groove may be omitted.

As explained above, the present invention provides two terminal pins fixed through the case with an insulating sealant, and a pair of electrode lead terminals of a tuning fork crystal resonator on the same plane at the base of the tuning fork. The pair of electrode lead terminals and two terminal pins are directly fixed to each other to support the vibrator and provide electrical connection, so the vibrator cannot be hung using conventional wires. Compared to methods using structures or wire bonding, workability can be significantly improved.

In the case of this invention, for example, the tips of two terminal pins are soldered and buttoned, the vibrator is placed so that the electrode lead terminals of the vibrator are in contact with the buttons, the whole is heated, and it can be supported by itself. and electrical connection steps are completed.

In addition, since the present invention directly fixes the two terminal pins and the vibrator, it not only has a simpler structure with fewer parts than conventional methods, but also has a structure that is strong against shock. Also, since thin wires are not required, miniaturization can be further promoted.

In addition, in order to eliminate vibration leakage of the vibrator, it is necessary to make the resonant frequency of the vibrator itself and the resonant frequency of the supporting system approximately equal, but in the case of this invention, the support system uses Since it is only a terminal pin, it is only necessary to specify its length, which has the advantage of making the design extremely easy.

In addition, if a curved surface is provided near the rigid support portion of the terminal pin as shown in the example, the elasticity of the curved surface can prevent external shocks.
In particular, shocks in the direction perpendicular to the direction of the tuning fork's bending vibration can be absorbed.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention, and FIG. 2 is a plan view with the upper case 6 removed. 1... Tuning fork type crystal resonator, 2, 3... Terminal pin, 4
...Sealing agent, 5...Lower case, 6...Upper case.

Claims (1)

[Scope of utility model registration request] In a resonator unit having a tuning fork type crystal resonator in a container, the container includes a case that covers the tuning fork type crystal resonator with an opening left, and an insulating material such as glass filled in the opening of the case. and two terminal pins penetrating the sealant, the tuning fork type crystal resonator comprises:
The pair of electrode lead terminals is configured to be on the same plane as the tuning fork base, and the pair of electrode lead terminals and the two terminal pins are directly fixed to serve both as support for the vibrator and for electrical connection. A tuning fork type crystal resonator unit featuring: