JPH057771Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Object of the Invention> [Industrial Application Field] The present invention relates to a holding structure that improves the mechanical strength of a retainer fixed to an insulating substrate.

[Prior Art] Among piezoelectric oscillators, crystal oscillators are widely used. Recently, surface-mounted crystal resonators have also been used. Especially for surface-mounted resonators,
A conductive material such as silver palladium is placed on an insulating substrate such as ceramic, and the holder of the vibrator is fixed onto it with conductive adhesive or solder, and the lid is sealed with glass frit, etc., but the holder does not cause vibrations. It is easy to peel off from the insulating substrate due to distortion caused by the difference in thermal expansion coefficient between the vibrator and the insulating substrate due to impact or heat during sealing. This is because it is smaller and has a smaller fixed area, and the metal plate of the retainer is thin, so it is easy to turn over. For this reason, vibrations and shocks cause it to gradually peel off from the edge of the part where it is adhered to the insulating substrate.

FIG. 8 is a front view showing a conventional holding structure.

[Problem to be solved by the invention] Therefore, the metal plate of the cage can be made thicker, but this time, the cage does not have spring properties and separation occurs between the vibrator and the cage. Therefore, it is necessary to improve the strength without changing the thickness of the metal plate.

[Objective of the present invention] An object of the present invention is to provide a cage structure with high strength without increasing the plate thickness.

<Structure of the present invention> [Means for solving the problem] The present invention provides a piezoelectric vibrator holding structure in which a retainer is fixed on a conductor of an insulating substrate, and a piezoelectric vibrator is placed and fixed on the retainer. Reinforcement extending from the substrate fixing portion in the same direction as the connecting portion connecting the substrate fixing portion of the holder to the insulating substrate and the vibrator mounting portion mounting and fixing the piezoelectric vibrator. This is a holding structure for a piezoelectric vibrator, which has a bent portion in which a peripheral edge portion of the substrate fixing portion that is fixed to the insulating substrate is bent upward.

[Operations and Examples] FIGS. 1 and 2 are a plan view and a front view showing an example of the present invention. A conductor 2 is provided on an insulating substrate 1 made of ceramic or the like by firing silver palladium or the like, and is led out to the side surface of the insulating substrate to form an output terminal.
A holder 4 on which a piezoelectric vibrator 3 is placed and fixed on a conductor 2 on an insulating substrate is fixed with a conductive adhesive, solder, or the like. The holder 4 is formed by integrally forming a metal plate by etching or pressing, and consists of a resonator mounting part 5 on which the crystal resonator 3 is placed, a coupling part 6, and a substrate fixing part 7. From the connecting part 6
A reinforcing portion 8 is provided in the same direction as the insulating substrate 1 and is fixed to the insulating substrate 1.

This reinforcing part 8 is provided to prevent the board mounting part from peeling off near the joint of the board mounting part, since a thin metal plate with high springiness is susceptible to tension from the vibrator mounting part. As shown in Figure 5, if there is no reinforcing part, it will start to peel from the vicinity of the joint in response to the force that is pulled upward from the joint, but with the reinforcing part, it will not peel off easily as shown in Figure 6. Become. One reason for this is that the bonding area has become wider, but more than that, it has a great effect in making it difficult for the bonding part to peel off even when pulled in a direction perpendicular to the insulating substrate 1.

It should be noted that there is a bent part 9 which is formed by bending the end of the board fixing part, and this also has the effect of increasing the apparent thickness to prevent "peeling".

Furthermore, in another embodiment of the present invention, as shown in FIGS. 3a and 3b, the vibration and shock resistance is further improved by providing a bent buffer section at the joint.

Further, as shown in FIGS. 4a and 4b, it goes without saying that even more effects can be obtained by providing the connecting portion at the center and providing two reinforcing portions at both ends of the connecting portion.

<Effects of the present invention> With the present invention, even if the cage is made of a thin metal plate with high spring properties, the reinforcing part can be extended in the same direction as the joining part of the board fixing part, and the reinforcing part can be insulated. By adhering to the substrate, it becomes strong against tensile forces from the joint due to vibrations and shocks. Furthermore, by providing a bent portion at the joint, it was possible to further strengthen the structure against vibrations and shocks.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a front view showing an embodiment of the present invention, Figs. 3 a, b,
Figures 4a and b are plan and front views showing other embodiments of the present invention, Figures 5a and b are explanatory diagrams when tensile force is applied to the conventional cage structure, and Figure 6 a, b
is an explanatory diagram when a tensile force is applied to the retainer structure of the present invention, FIG. 7 is an external perspective view of a piezoelectric vibrator in which the retainer structure of the present invention is used, and FIG. 8 is a conventional retainer. It is a front view. DESCRIPTION OF SYMBOLS 1... Insulating substrate, 2... Conductor, 3... Piezoelectric vibrator, 4... Holder, 5... Vibrator mounting part, 6...
...Connection part, 7... Board fixing part, 8... Reinforcement part, 9
...Bending part.

Claims (1)

[Scope of utility model registration request] In a piezoelectric vibrator holding structure in which a holder is fixed onto a conductor of an insulating substrate and a piezoelectric vibrator is placed and fixed on the holder, a substrate fixing portion of the holder is fixed to the insulating substrate and the piezoelectric vibration A reinforcing part extends from the substrate fixing part in the same direction as the connecting part connecting the transducer mounting part on which the transducer is placed and fixed, and a peripheral edge part of the substrate fixing part that fixes to the insulating substrate. A piezoelectric vibrator holding structure characterized by having a bent portion bent upward.