JPH0246106Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a piezoelectric vibrating component in which a piezoelectric vibrator, which is integrally formed with a mechanical vibrating part, a coupling part, and a frame part equipped with a piezoelectric transducer, is housed in a case. .

(Prior Art) A piezoelectric vibrating component having the above-mentioned structure is described in, for example, Japanese Patent Laid-Open No. 59-61934. FIG. 2 shows the main parts of such a piezoelectric vibrating component. In the figure, 1 is a piezoelectric vibrator, a mechanical vibrating part 2, a coupling part 3, and a frame part 4 are integrally formed of a constant elastic metal such as Elinvar, and one surface of the mechanical vibrating part 2,
A piezoelectric thin film 5 made of ZnO or the like is continuously formed on one surface of the coupling portion 3 and a part of one surface of the frame portion 4, and an electrode film 6 is further formed thereon. The electrode film 6 consists of a drive electrode 6a, an extraction electrode 6b, and a terminal connection electrode 6c. In the piezoelectric vibrator 1 having such a structure, since the Elinvar has a drive electrode function that pairs with the drive electrode 6a, electrical connection can be established by welding the external connection terminal 7 to a predetermined portion of the frame portion 4. Achieves mechanical retention and fixation. The terminal connection electrode 6c and the external connection terminal 8 are connected by a bonding wire 9. Note that 10 is a spacer for securing a vibration space and is a part of a case (not shown). However, with this configuration, as the resonators themselves become thinner and smaller, problems such as misalignment during welding, welding pressure and plastic deformation, and adhesion of welding sparks (scattered pieces) become problems. The small size of the device was a barrier to achieving higher precision. In addition, the number of man-hours required for assembling the connections was large.

(Problems to be Solved by the Invention) Therefore, the aim of this invention is to simplify the electrical connection, holding, and fixing of the piezoelectric vibrator and the external connection terminal.

(Means for solving the problem) In this invention, the side part of the frame that connects to the coupling part of the piezoelectric vibrator as described above has leaf spring characteristics, and the springy external connection terminal is press-fitted to this side part of the frame. do.

(Function) Therefore, electrical connection, holding, and fixing can be easily and reliably performed.

(Example) FIG. 1 shows an example of this invention. 17,1
8 is an external connection terminal with spring properties. 1
Reference numeral 9 designates spacers that support the four corners of the frame portion 4 from below. The spacer 19 is formed by protruding a part of the case. With such a configuration, as shown in FIG. 3, the claim portion 4 itself has leaf spring characteristics, and at the same time, the external connection terminal also has leaf spring characteristics, so a synergistic spring action occurs at the contact portion of the two, and electricity is generated. The connection is secure, and it is firmly held and fixed.

(Effects) As is clear from the above examples, this invention has the following effects. The electrical connection between the external connection terminal and the claim or terminal connection electrode is highly reliable.During assembly, the synergistic spring action creates a cleaning effect on the electrical connection and ensures reliable contact, compared to the conventional assembly structure. The number of assembly steps can be significantly reduced.The synergistic spring action increases the holding force, making it resistant to external vibrations and shocks.As assembly is easier, piezoelectric vibrating parts can be made smaller, and products in higher frequency ranges can also be manufactured. .

Note that if the external connection terminal, the electrodes and the vibrator that come in contact with the external connection terminal are made of the same kind of metal, the electrolytic corrosion effect caused by contact between different kinds of metals will be eliminated, and the reliability will be higher.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a perspective view of a conventional example, and FIG. 3 is an operational view of an embodiment of the present invention. 1 is a piezoelectric vibrator, 2 is a mechanical vibration section, 3 is a coupling section, 4 is a frame section, 5 is a piezoelectric thin film, 6 is an electrode film, 17 and 18 are external connection terminals, and 19 is a spacer.

Claims (1)

[Scope of utility model registration request] In a piezoelectric vibrating component in which a piezoelectric vibrator is integrally formed with a mechanical vibrating part, a joint part, and a frame part equipped with a piezoelectric transducer and is housed in a case, the side part of the frame that connects to the joint part has leaf spring characteristics. A piezoelectric vibrating component characterized in that electrical connection and holding and fixing of a piezoelectric vibrator are achieved by press-contacting an external connection terminal of the frame to a side portion of the frame.