JPH0229280Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] The present invention relates to a small fan that uses a piezoelectric vibrator to vibrate a vibrating blade plate and blows air using the principle of beating blades. [Prior Art] A conventional small fan of this type has one end of a piezoelectric vibrator 1 fixed to a support part 4 as shown in FIG. 4, and a lightweight linear connection connected to the other end of the piezoelectric vibrator 1. A vibrating vane plate 2 is attached via a member 3a, and an alternating current voltage is applied between both electrodes 5a and 5b of the piezoelectric vibrator 1 to vibrate the vibrating vane plate 2 to blow air using the principle of beating wings. It is used to cool the cooled components of electronic circuit devices. [Problem to be solved by the invention] In order to be able to blow a large amount of air in the conventional small fan described above, the effective length L of the piezoelectric vibrator 1 is lengthened to reduce the vibration at the tip of the piezoelectric vibrator 1. There were problems in that the piezoelectric vibrator had to be relatively large and had to use a long piezoelectric vibrator, making it expensive. In addition, a space for installing the fan was required. [Means for Solving the Problems] In order to solve the above-mentioned problems, the small fan of the present invention fixes one end of the piezoelectric vibrator 1 to the support part 4 as shown in the first figure, and fixes the other end of the piezoelectric vibrator 1 to A vibrating vane plate 2 is attached to the end via a connecting member 3, and the free end of the vibrating vane plate 2 extends toward the support portion of the piezoelectric vibrator 1. [Function] With this configuration, the piezoelectric fan is miniaturized, and the displacement magnification effect of the connecting member 3 is large, so that the vibration at the tip of the piezoelectric vibrator 1 is greatly magnified compared to the conventional one, and the vibration vane plate 2 It is possible to transmit a large amount of air by vibrating the tip of the vibrating vane plate 2 to a large extent. [Embodiment] An embodiment of the small fan of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the small fan of the present invention, FIG. 2 is a right side view thereof, and FIG. 3 is a plan view thereof. 1 to 3, reference numeral 1 denotes a piezoelectric vibrator, for example, film-like electrodes 5a, 5 on both sides of a polymer-based piezoelectric film 6.
b, and both membrane electrodes 5a and 5b are insulated with an insulator as necessary. One end of this piezoelectric vibrator 1 is fixed to a support part 4, and the other end of the piezoelectric vibrator 1 has an L-shaped or rectangular vibrating vane plate 2 made of lightweight synthetic resin with high elastic modulus, for example, polyethylene terephthalate. It is attached to one end of the letter-shaped connecting member 3, and the other end of the connecting member 3 is coupled to the piezoelectric vibrator 1, so that the free end of the vibrating vane plate 2 extends toward the support portion 4 side. In this embodiment configured in this manner, the vibrating vane plate 2 is arranged so as to face the cooled components (heat-generating components such as amplifier transistors) of the electronic circuit device. When an alternating current voltage is applied between both electrodes 5a and 5b of the piezoelectric vibrator 1, the vibrating vane plate 2 vibrates, and air can be blown to the parts to be cooled to cool the parts according to the principle of beating wings. In this case, the vibrating vane plate 2 resonates with the vibration of the piezoelectric vibrator 1, causing the tip of the vibrating vane plate 2 to vibrate greatly, thereby making it possible to blow a large amount of air. The following Table 1 shows the results of measuring the air volume for the conventional example shown in FIG. 4, which is connected in a straight line, and the present example shown in FIGS. 1 to 3.

[Effect of idea]

As described above, according to the present invention, since the vibrating vane plate 2 is attached to the piezoelectric vibrator 1 via the bent connecting member 3, the displacement amplification effect of the connecting member 3 is large, and the vibrating vane plate 2 can be made larger than before. It can vibrate and blow a large amount of air. Furthermore, since the effective length L of the piezoelectric vibrator 1 may be short to obtain the same air volume as the conventional example, the piezoelectric vibrator 1 can be made smaller and cheaper.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the small fan of the present invention, Fig. 2 is a right side view thereof, Fig. 3 is a plan view thereof, and Fig. 4 is a front view showing an example of a conventional small fan. be. 1... Piezoelectric vibrator, 2... Vibrating vane plate, 3...
Connection member (heavy body), 4...Support part.

Claims (1)

[Scope of utility model registration request] One end of the piezoelectric vibrator is fixed to a support part, a vibrating blade plate is attached to the other end of the piezoelectric vibrator via a connecting member, and the free end of the vibrating blade plate is directed toward the support part of the piezoelectric vibrator. A small fan characterized by being configured to extend.