JPS6017949Y2 - Holder for Onmata type crystal unit - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a holder for supporting a tuning fork crystal resonator.

Conventionally, in order to support a low-frequency crystal resonator, it has been common practice to support a resonator 4 via a wire 3 such as a bronze wire on a support 2 installed on a base 1 as shown in FIG. However, this structure had the drawback of being significantly inferior in vibration and impact resistance.

Therefore, in the tuning fork crystal oscillators used in recent wristwatches, etc., the vibration mode is shown in Fig. 2, which exhibits so-called tuning fork vibration in which both legs vibrate in opposite directions. As shown, a tuning fork-shaped crystal resonator 5 is supported at the center of its base on a base 1 via a support rod 6, and an electrical lead wire 7 is also used.

However, with such a holder, the balance of stress applied to the vibrator 5 between the point-supporting support rod 6 and the wire 7 is likely to be disrupted even by slight deformation of the support rod 6. There was a risk that the effective resistance would change.

Therefore, when manufacturing such a holder, the support rod 6 is required.
Very advanced technique and intuition were required to attach the vibrator 5 to the oscillator.

The present invention was developed in view of the above circumstances, and the purpose is to provide a holder for a tuning fork crystal resonator that is easy to assemble, provides stable electrical characteristics, and has excellent vibration and shock resistance. do.

An embodiment of the present invention will be described below with reference to FIGS. 3a and 3b.

That is, 8 is a base, and a conductive substrate 9 is formed on the upper surface of this base 8, and a pair of lead terminals 1 are implanted in the base 8.
0.10 is exposed on the upper surface of the base 8, and one terminal 10 of the terminals 10 is electrically connected to the substrate 9.

Then, the bottom side of the tuning fork crystal resonator 11 is attached to the substrate 9 on the base 8 with a conductive adhesive 12 such as solder or wax.
(In this case, the adhesive 12 has an acoustic impedance completely different from that of the vibrator 11.

), thereby bonding one electrode (not shown) of the vibrator 11 to one lead terminal 10, and then attaching the other electrode to the other lead terminal 10 using a lead wire or conductive adhesive 13. Connecting.

According to such a configuration, since the crystal resonator 11 is directly bonded to the base 8 with an adhesive, the stress on the resonator 11 and the lead wires is reduced compared to the case where the crystal resonator 11 is supported by a conventional support rod. Balance can be stably obtained, and thereby stable electrical characteristics can be obtained.

Furthermore, when the vibrator 11 is bonded to the substrate 9 on the base 8, one electrode and the lead terminal 10 can be connected at the same time, so the number of assembly steps can be reduced and the above-mentioned vibrator is suitable for automation. If this is combined with direct adhesion to the base, assembly can be significantly simplified and the shape can be made smaller.

[Brief explanation of drawings]

Figures 1 and 2 are perspective views showing conventional tuning fork type crystal resonator holders, and Figures 3a and 3b show an embodiment of the tuning fork type crystal resonator holder according to the present invention, and a shows only the holder. , and b are perspective views showing a state in which a tuning fork crystal resonator is supported. Death... Base, 9... Conductive substrate, 10.
...Lead terminal, 11 ...Tuning fork crystal resonator, 12 ...Adhesive, 13 ...Lead wire.

Claims (1)

[Scope of utility model registration request] A tuning fork-shaped ice crystal resonator having a pair of electrodes, a base having a conductive substrate formed on its upper surface, and a lower end surface of the tuning fork-shaped crystal resonator being adhered to and held on the conductive substrate of the base; a conductive adhesive that allows the electrode to pass through the conductive substrate; and a conductive adhesive that is implanted in the base and has one tip connected to the conductive substrate and the other tip connected to the other electrode of the vibrator via a lead wire. A holder for a tuning fork crystal resonator, comprising a pair of lead terminals connected to the holder.