JPS5837117Y2 - sound generator - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a sound generating device using bowl-shaped phosphorus.

Conventionally, as this type of sound generating device, an electric bell has been used as an alarm device for a clock or the like.

The electric bell uses a small DC motor to rotate or swing a shmoku, and the shmock hits a ring to generate sound.

However, this electric bell had many drawbacks, such as having a large number of parts and being troublesome to manufacture and assemble.Also, when the shmoku struck the phosphorus, it made a rough sound and did not take full advantage of the phosphorus's characteristics.

The present invention eliminates the above-mentioned conventional drawbacks, and one embodiment thereof will be described with reference to the drawings.

A plurality of (three in the illustrated example) bowl-shaped metal phosphors 1.2.
3 are arranged so that their openings or the vicinity thereof lightly touch each other or are placed close to each other with a small gap, and the center of each bottom is supported on a mounting base 7 via a coil spring 4, 5, 6, which is an elastic member. There is.

Further, phosphorus 1, 2.3 increases in size in this order.

In other words, phosphorus 1, 2, and 3 occur at lower rates in this order.

A well-known piezoelectric element 8 is adhered to the inner surface of the center ring 2 using an adhesive.

Although not shown, drive electrode films are formed on both surfaces of the piezoelectric element 8 by a method such as vapor deposition.

Lead wires 9 and 10 are connected to one electrode film and phosphorus 2.
is connected.

Now, when an inverted drive signal having a period approximately equal to the natural (resonant) frequency of the phosphor 2 is supplied to the lead wires 9 and 10, the phosphor 2 vibrates at its natural frequency due to bending vibration due to the piezo effect of the piezoelectric element 8.

Due to the vibrational displacement of the ring 2, the openings of this ring and the adjacent rings 1 and 3 collide with each other.

Therefore, each of the rings 1, 2, and 3 generates a unique sound, and a chord is generated.

In the above embodiment, the size of the rings 1, 2, and 3 is changed to change the pitch of the sound, but the pitch of the sound can be changed by changing other things, such as the thickness, material, or shape. It can also be made different.

Of course, the rings 1°2.3 may have the same shape and be made of the same material.

Various materials can be used for the phosphors 1, 2, and 3, such as glass and ceramics in addition to metal.

Further, the above drive signal does not necessarily have to be equal to the natural frequency of the phosphor 2.

Furthermore, piezoelectric elements 8 may be provided for all rings 1, 2.3, respectively.

In this case, it is desirable that the period of the signal supplied to each piezoelectric element corresponds to the natural frequency of each phosphor, but the same signal may be used.

The supporting structure of the phosphorus chlorides 1, 2, and 3 is also not particularly limited.

For example, rubber may be used instead of the coil springs 4, 5, 6, or each ring may be directly fixed to the mounting base 7 by spot welding or the like.

However, it is more advantageous in terms of operating characteristics to support it via an elastic member such as a coil spring or rubber.

As described above, according to the sound generating device of the present invention, since the phosphorus is not hit with a hammer or the like as in the past, no rough sound is generated, and the light and pleasant clear sound unique to phosphorus can be produced, and the characteristic of phosphorus is can make the most of it.

Furthermore, by making the pitches of each ring different, chords can be easily generated, resulting in even more audible acoustics.

Furthermore, if each ring is supported using an elastic member, each ring can separate immediately when they collide, so the reaction force at that time will not have a negative effect on the vibration of the ring, and will not cause distortion in the sound. etc., the operating characteristics are improved.

Moreover, since the current consumption is small, it is most suitable as an alarm device for a watch, and in particular, in the case of a quartz watch, since an appropriate frequency can be easily obtained, it is convenient for driving the device.

[Brief explanation of the drawing]

The drawing is a sectional view showing a schematic configuration of a sound generating device according to the present invention. 1.2.3...Rin, 4,5.6...
Elastic member, 7...Mounting base, 8...Piezoelectric element.

Claims (1)

[Scope of utility model registration request] 1. A sound generator comprising a plurality of phosphors arranged close to each other so that openings or the vicinity thereof touch each other or have a minute gap, and a piezoelectric element attached to at least one of the phosphors to vibrate the phosphors. Device. 2. The sound generating device according to claim 1, wherein each of the phosphors is supported via an elastic member. 3. The sound generating device according to claim 1, wherein each of the phosphors has a different sound pitch.