CN201248133Y - Piezoelectric acoustical generator - Google Patents

Abstract

The utility model provides a piezoelectricity sounder which comprises a base, an electric terminal embedded in the base, a piezoelectricity sheet accommodated in the base and a cover plate covered on the base, wherein the electric terminal is electrically connected with the piezoelectricity sheet through the connection with the conducting wire. Compared with the prior art, the utility model has steady electrical connection and improved product performance because of the adopting of the conducting wire for electric connection.

Description

Piezo-electric acoustic generator

[technical field]

The utility model relates to a kind of microphone device, relates in particular to a kind of piezoelectric type vibration sounding device.

[background technology]

Potsherd has inverse piezoelectric effect, promptly under the effect of extra electric field, mechanical deformation takes place.Utilize this characteristic, potsherd can be used for making piezoelectric type vibration sounding devices such as piezo-electric loudspeaker, piezoelectric vibrator.

The piezo-electric acoustic generator 10 of relevant existing structure comprises base 11, is embedded power connection end 12 on base, is contained in piezoelectric patches 13, He Gai in the base and receives cover plate 14 on the base as shown in Figure 4, and piezoelectric patches 13 is bonded on power connection end 12 by elargol.When feeding the signal of telecommunication on power connection end 12, inverse piezoelectric effect takes place in piezoelectric patches 13, produces vibration, sounds.

This type of piezo-electric acoustic generator 10 causes the electric connection instability between them because piezoelectric patches directly is bonded on power connection end, has influenced the performance of product; And the problem that elargol is thrown off takes place through in the process of Reflow Soldering the time in product easily, causes disconnecting between piezoelectric patches 13 and power connection end 12, makes the rate of finished products reduction of product.

[utility model content]

The technical problem that the utility model need solve is to overcome above-mentioned deficiency, and a kind of well behaved piezo-electric acoustic generator is provided.

According to the above-mentioned technical problem that needs solution, designed a kind of piezo-electric acoustic generator, comprise base, be embedded power connection end on base, be contained in piezoelectric patches, He Gai in the base and receive cover plate on the base, power connection end electrically connects by linking to each other with lead with piezoelectric patches.

Further improve as the utility model, be provided with the bracing frame of a location and supporting piezoelectric patches periphery in the described base.

Further improve as the utility model, described piezoelectric patches comprises the metal substrate and the potsherd of mutual applying, and described metal substrate links to each other with lead respectively with potsherd.

Further improve second power part in order to link to each other on described power connection end comprises first power part being located in the base and linking to each other with lead and is located at base outer surface with external circuit as the utility model.

Compared with prior art, owing to adopt lead to be electrically connected, electric connection of the present utility model is stable, and properties of product improve.

[description of drawings]

Fig. 1 is the combination stereogram of the utility model piezo-electric acoustic generator;

Fig. 2 is the exploded perspective view of the utility model piezo-electric acoustic generator;

Fig. 3 is that the utility model piezo-electric acoustic generator piezoelectric patches is assemblied in the schematic diagram in the base;

Fig. 4 is the exploded perspective view of the piezo-electric acoustic generator of relevant existing structure.

[embodiment]

The utility model is described in further detail below in conjunction with drawings and embodiments.

As Fig. 1, Fig. 2, shown in Figure 3, the utility model piezo-electric acoustic generator 20 comprises base 21, be embedded power connection end 22 on base, be contained in piezoelectric patches 23, lid in the base receives cover plate 24 on the base, realizes the lead 25 that electrically connects.

The utility model base 21 is a rectangle, comprises bottom 211 and sidewall 212.On the bottom, be provided with a bracing frame 210, be used to locate and support the periphery of piezoelectric patches.

Power connection end 22 comprises first power part 220 and second power part 221.First power part is located at the corner of bracing frame 210.Second power part is located on the outer surface of base side wall, in order to link to each other with external circuit, to realize input electrical signal.

Piezoelectric patches 23 is fitted mutually by metal substrate 231 and potsherd 232 and is formed, metal substrate 231 comprise upper surface 231a and with the upper surface opposing lower surface, its lower surface links to each other with the bracing frame 210 of base, but does not contact with power connection end 22.The upper surface 231a of potsherd 232 and substrate fits, and the potsherd of present embodiment is circular, and its area is less than the area of substrate.

For applying electric field to piezoelectric patches, the utility model adopts two leads 25 respectively substrate 231 and potsherd 232 to be electrically connected on power connection end 22.Can be connected by spot welding between lead and substrate, potsherd, power connection end.Adopt this connected mode, it is stable that the utility model is electrically connected, and properties of product also improve, and have prolonged the useful life of product.

On the top of base 21 sidewalls, be provided with a locating platform 213, the form fit of locating platform and loam cake 24, with so that loam cake when being assembled on the base, good positioning effect.Loam cake links to each other with base can be bonding by epoxy glue.

Potsherd of the present utility model has inverse piezoelectric effect, promptly under the effect of extra electric field, mechanical deformation takes place.Potsherd and substrate constitute vibration unit jointly, when feeding the signal of telecommunication on power connection end, promptly give potsherd one field effect, potsherd generation inverse piezoelectric effect, thus vibration unit produces vibration, sounds.

Above-described only is execution mode of the present utility model, should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the utility model design, can also make improvement, but these all belongs to protection range of the present utility model.

Claims (4)

1, a kind of piezo-electric acoustic generator comprises base, is embedded power connection end on base, is contained in piezoelectric patches, He Gai in the base and receives cover plate on the base, and it is characterized in that: power connection end electrically connects by linking to each other with lead with piezoelectric patches.

2, piezo-electric acoustic generator according to claim 1 is characterized in that: the bracing frame that is provided with a location and supporting piezoelectric patches periphery in the described base.

3, piezo-electric acoustic generator according to claim 2 is characterized in that: described piezoelectric patches comprises the metal substrate and the potsherd of mutual applying, and described metal substrate links to each other with lead respectively with potsherd.

4, piezo-electric acoustic generator according to claim 3 is characterized in that: second power part in order to link to each other with external circuit on described power connection end comprises first power part being located in the base and linking to each other with lead and is located at base outer surface.

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