TWM469703U - Piezoelectric speaker - Google Patents

Description

Piezoelectric speaker

The present invention relates to a piezoelectric horn, and more particularly to a piezoelectric horn which can have the effects of vibration damping and sound insulation, and which is reflected by the channel so that the low frequency amplitude is increased to optimize the sound quality.

Conventional piezoelectric horns, because there is no need for magnets and no voice coils, only need to use a diaphragm to make sound, so the operation on energy conversion is much simpler. In more detail, the sounding process of the general horn is changed by electric energy. For magnetic energy, the mechanical energy is changed again; while the piezoelectric horn is directly converted from electrical energy into mechanical vibration for sounding, which has the advantage of improving the sounding efficiency.

However, although the piezoelectric horn is inherently free of various distortion problems caused by permanent magnets and voice coils, the fly in the ointment is that the piezoelectric horn cannot obtain a large amplitude for the low frequency, and thus cannot meet the required amplitude of the bass, resulting in the current pressure. The electric horn is only suitable for the high audio range in the field of application.

In view of the above-mentioned problems of the prior art, the purpose of the present invention is to provide a piezoelectric horn to solve the problem that the conventional piezoelectric horn needs to be improved.

According to the purpose of the present invention, a piezoelectric horn is proposed, which comprises an acoustic substrate, a resonance speaker, a suspension structure and a reflection speaker. The sounding substrate is provided with at least one piezoelectric ceramic element that can oscillate the sounding substrate. The resonant speaker has a first opening, the inner edge of the first opening forms a first bearing portion, the sounding substrate is disposed on the first carrying portion, and a resonant cavity is formed between the sounding substrate and the resonant speaker. The suspension structure is disposed between the first bearing portion and the sound emitting substrate. The reflective speaker has a second opening and a reflective output port, and a part of the inner edge of the second opening forms a second carrying portion, the resonant speaker is disposed on the second carrying portion, and a reflective cavity and a reflective output are formed between the resonant speaker and the reflective speaker. Located on one side of the reflective speaker, and the reflective cavity communicates with the reflective output.

Preferably, the piezoelectric horn further includes a circuit board disposed in the resonant cavity and transmitting an actuation signal to the at least one piezoelectric ceramic component to cause the at least one piezoelectric ceramic component to generate vibration.

Preferably, the piezoelectric horn further includes at least one damper unit disposed on a side of the reflective speaker opposite to the second opening.

Preferably, the reflective speaker is movably coupled to the predetermined surface of the object with respect to one of the second openings.

Preferably, at least one piezoelectric ceramic component can be disposed on the sound emitting substrate and located in the resonant cavity.

Preferably, at least one piezoelectric ceramic component can be disposed on one side of the sound emitting substrate relative to the resonant cavity.

Preferably, when the resonant speaker is disposed on the second carrying portion, a portion of the second opening exposed adjacent to one side of the resonant speaker may be a reflective output.

Preferably, the hanging edge structure may comprise a plurality of holes.

Preferably, the damping coefficient of the suspension structure may be greater than the damping coefficient of the sounding substrate.

As described above, the piezoelectric horn of the present invention can make the sounding substrate tightly disposed on the first bearing portion by the hanging structure, thereby forming a closed resonant cavity between the sounding substrate and the resonant speaker, and hanging The edge structure also has a similar function of damping. The hanging edge structure can reduce the vibration generated by the reflective speaker and the resonant speaker when the sounding substrate is sounded, and can absorb part of the impact force when the piezoelectric speaker is hit to avoid damage of the piezoelectric speaker. In addition, the reflective cavity and the exposed second opening are in communication with each other to form a reflective flow path, and then the sound is reflected by the reflective cavity and the reflective flow path, and the amplitude of the low frequency is increased, and then the exposed portion is Two opening outputs.

1‧‧‧Piezoelectric Horn

11‧‧‧ Sounding substrate

111‧‧‧ Piezoelectric ceramic components

12‧‧‧Resonance Speaker

121‧‧‧first opening

122‧‧‧First load bearing department

123‧‧‧Resonant cavity

13‧‧‧Overhang structure

131‧‧‧ holes

14‧‧‧Reflex speakers

141‧‧‧ second opening

142‧‧‧Second load bearing department

143‧‧‧Reflecting cavity

144‧‧‧reflective output

15‧‧‧Circuit board

16‧‧‧damping unit

2‧‧‧ Targets

21‧‧‧Preset surface

The first picture is a combination of the piezoelectric horns of the present invention.

Figure 2 is an exploded view of the piezoelectric horn of the present invention.

Figure 3 is a first cross-sectional view of the piezoelectric horn of the present invention.

Figure 4 is a schematic view of the back side of the piezoelectric horn of the present invention.

Figure 5 is a cross-sectional view of the suspension structure of the piezoelectric horn of the present invention.

Figure 6 is a practical application diagram of the piezoelectric horn of the present invention.

Figure 7 is a second cross-sectional view of the piezoelectric horn of the present invention.

In order to understand the technical characteristics, content and advantages of the creation and the effects that can be achieved by the examiner, the author will cooperate with the schema and explain the following in the form of the embodiment, and the schema used therein The subject matter is only for the purpose of illustration and supplementary instructions. It is not necessarily the true proportion and precise configuration after the implementation of the original creation. Therefore, the proportions and configuration relationships of the attached drawings should not be interpreted or limited in the actual implementation scope. First described.

Please refer to Figures 1 to 6; Figure 1 is a combination of the piezoelectric horns of the present invention; Figure 2 is an exploded view of the piezoelectric horn of the present invention; Figure 3 is the piezoelectric horn of the present creation The first cross-sectional view; the fourth figure is a schematic view of the back side of the piezoelectric horn of the present invention; the fifth figure is a cross-sectional view of the suspension structure of the piezoelectric horn of the present invention; and the sixth figure is the piezoelectric horn of the present invention The actual application diagram. As shown in the figure, the piezoelectric horn 1 of the present invention comprises an audible substrate 11, a resonant horn 12, a hanging structure 13 and a reflective speaker 14.

Wherein, the sounding substrate 11 can be made of paper, wood, phenolic resin, polyethylene (PE), polyethylene terephthalate (PET) or a combination thereof, but should not be used as The sound emitting substrate 11 is provided with at least one piezoelectric ceramic element 111 that can drive the sounding substrate 11 to vibrate. The resonant speaker 12 has a first opening 121. The inner edge of the first opening 121 forms a first carrying portion 122. The sounding substrate 11 is disposed on the first carrying portion 122, and a resonant cavity 123 is formed between the sounding substrate 11 and the resonant speaker 12. Wherein, the resonant cavity 123 should be a cavity having a sealing effect, but the structural combination thereof is not further limited herein. The suspension structure 13 is disposed between the first carrier portion 122 and the sound emitting substrate 11 . The reflective speaker 14 has a second opening 141 and a reflective output port 144. A portion of the inner edge of the second opening 141 forms a second carrying portion 142. The resonant speaker 12 is disposed on the second carrying portion 142, and the resonant speaker 12 and the reflective speaker 14 are Forming a reflective cavity 143, the reflective output port 144 is located on one side of the reflective speaker 14, and the reflective cavity 143 is connected to the reflective output port 144; in other words, the reflective speaker 14 has the function of increasing the sound reflection path, and in this embodiment The shape of the reflective cavity 143 formed by it is not limited.

In the above embodiment, the piezoelectric ceramic component 111 is not limited to the sounding substrate 11 . For example, the piezoelectric ceramic component 111 can be disposed on one surface of the sound emitting substrate 11 and located in the resonant cavity 123 . It is also disposed on the other side of the sounding substrate 11 opposite to the resonant cavity 123; however, the above is merely an example, and the position of the piezoelectric ceramic element 111 should not be limited.

In other words, the piezoelectric horn 1 further includes a circuit board 15 disposed in the resonant cavity 123, but is not limited to a specific position in the resonant cavity 123; the circuit board 15 is used for transmitting and actuating The signal is applied to the piezoelectric ceramic element 111 to cause the piezoelectric ceramic element 111 to generate vibration, thereby causing the sounding substrate 11 to vibrate to generate sound.

The suspended structure 13 of the present invention can have the characteristics of damping, so that it can provide the effects of vibration damping and sound insulation, and can be composed of rubber, silicone, foamed material, spring, magnet, steel sheet or other elastic material. Preferably, the damping coefficient of the suspension structure 13 is greater than the damping coefficient of the sounding substrate 11; in the embodiment, the suspension structure 13 is disposed on the first bearing portion 122, and when the sounding substrate 11 is combined with the resonant speaker 12, The sounding substrate 11 is closely coupled to the first carrier portion 122 by the suspension structure 13, in other words, a suspension structure 13 is disposed between the sounding substrate 11 and the resonant speaker 12 so as to be tightly coupled to each other.

Furthermore, the suspension structure 13 preferably has a plurality of holes 131, that is, the suspension structure 13 is made of a porous material; and the porous structure 131 of the suspension structure 13 during the sounding of the sounding substrate 11 The structural characteristics enable the suspension structure 13 to function as vibration absorption and sound insulation, thereby reducing the vibration generated by the vibration of the piezoelectric horn 1 as a whole by the vibration of the sounding substrate 11 to avoid affecting the sound quality; When the horn 1 is subjected to an impact, the suspension structure 13 can also reduce the impact force of the piezoelectric horn 1 by the vibration absorbing characteristics thereof, thereby reducing the risk of damage of the piezoelectric horn 1 and its components.

In view of the above description of the suspension structure 13, the piezoelectric horn 1 is further provided with at least one damper unit 16 on the side of the reflection speaker 14 opposite to the second opening 141; as the name implies, the damper unit 16 is interposed between the piezoelectric horn 1 and the damper unit Between the placement faces of the piezoelectric horn 1 as a buffer between the piezoelectric horn 1 and the placement surface; therefore, when the piezoelectric horn 1 vibrates during the utterance process, the damper unit 16 can avoid the pressure The electric horn 1 vibrates directly on the placement surface, thereby achieving the purpose of reducing the sound generated by the vibration between the piezoelectric horn 1 and the placement surface to maintain the sound quality of the piezoelectric horn 1.

Further, the piezoelectric horn 1 of the present invention is detachably disposed on the object 2, in the figure, the object 2 is exemplified by a window; the piezoelectric horn 1 is composed of the reflective speaker 14 opposite to the second opening 141. One side is connected to the preset surface 21 of the object 2, and the preset surface 21 is exemplified by glass in the illustration; the surface of the reflective speaker 14 can be directly connected to the preset surface 21, or can be preceded by the reflective speaker 14. The surface is provided with at least one connecting unit (such as a suction cup, not shown in the figure, and is not limited thereto), and is connected to the preset surface 21 by the connecting unit; Outside the predetermined position, during the utterance process, the preset surface 21 is vibrated together, thereby producing a sounding effect different from that of the piezoelectric horn 1 alone.

It should be noted that the reflective output port 144 may be formed by a portion of the second opening 141 exposed on one side of the resonant speaker 12 when the resonant speaker 12 is disposed on the second carrying portion 142. After being reflected by the flow path between the reflective cavity 143 and the reflective cavity 143 and the reflective output port 144, it is output by the reflective output port 144.

In addition, please refer to FIG. 7 , which is a second cross-sectional view of the piezoelectric horn of the present invention. As shown, the reflective output port 144 can be formed not only by the partially exposed second opening 141 but also by One side of the reflective speaker 14 is also in communication with the reflective cavity 143.

In actual use, whether the circuit board 15 outputs an actuation signal to the piezoelectric ceramic component 111 should be determined according to whether the switch is turned on or the power supply is supplied, and the related technology of the switch or the power supply terminal (such as the plug) should be The field is well known to those skilled in the art and, therefore, is not shown in the drawings and is not described in detail in this embodiment.

As described above, the piezoelectric horn of the present invention can be provided with a suspension structure in a joint portion between the first bearing portion and the sound emitting substrate, so that the sounding substrate can be tightly coupled to the first bearing portion, and the sounding substrate and the resonance The closed resonant cavity will be formed between the speakers; on the other hand, the hanging structure can also reduce the vibration generated by the reflective speaker and the resonant speaker when the sounding substrate is sounded, and can absorb part of the impact force when subjected to impact; The reflective cavity and the exposed second opening are in communication with each other to form a reflective flow path, and the reflection path of the reflected sound is extended by the reflective cavity and the reflective flow path to reflect the sound through the reflective cavity and the reflective flow path. Thereafter, the wavelength is increased to increase the amplitude of the low frequency, and then outputted by the exposed second opening.

Looking at the above, the piezoelectric horn of this creation is beyond the reach of conventional technology, and it has indeed achieved the desired effect, and it is not familiar with the skill of the artist, and it is progressive and practical. Obviously, it has already met the application requirements of the patent, and has filed a patent application according to law. You are requested to approve the creation of a patent application for this article, so as to encourage creation and to be sensible.

11‧‧‧ Sounding substrate

111‧‧‧ Piezoelectric ceramic components

12‧‧‧Resonance Speaker

121‧‧‧first opening

122‧‧‧First load bearing department

13‧‧‧Overhang structure

14‧‧‧Reflex speakers

141‧‧‧ second opening

142‧‧‧Second load bearing department

15‧‧‧Circuit board

Claims (9)

A piezoelectric horn comprising:
An acoustic substrate is provided with at least one piezoelectric ceramic component that can drive the sounding substrate to vibrate;
a resonant speaker has a first opening, the inner edge of the first opening defines a first carrying portion, the sound emitting substrate is disposed on the first carrying portion, and a sound insulating substrate and the resonant speaker form a Resonant cavity
a suspension structure is disposed between the first bearing portion and the sound emitting substrate; and a reflective speaker has a second opening and a reflective output port, and a portion of the inner edge of the second opening forms a second a receiving portion, the resonant speaker is disposed on the second carrying portion, and a reflecting cavity is formed between the resonant speaker and the reflective speaker, the reflective output port is located on one side of the reflective speaker, and the reflective cavity system is connected The reflection output port. The piezoelectric horn of claim 1, further comprising a circuit board disposed in the resonant cavity and transmitting an unifying signal to the at least one piezoelectric ceramic component to enable the at least one piezoelectric The ceramic component is thereby vibrated. The piezoelectric horn according to claim 1, further comprising at least one damper unit disposed on a side of the reflective louver opposite to the second opening. The piezoelectric horn of claim 1, wherein the reflective speaker is movably coupled to a predetermined surface of a target relative to one of the second openings. The piezoelectric horn of claim 1, wherein the at least one piezoelectric ceramic component is disposed on the sound emitting substrate and located in the resonant cavity. The piezoelectric horn according to claim 1, wherein the at least one piezoelectric ceramic component is disposed on a surface of the sound emitting substrate opposite to the resonant cavity. The piezoelectric horn according to claim 1, wherein when the resonant speaker is disposed on the second carrying portion, the second opening is a reflective output port adjacent to a portion of the resonant speaker. The piezoelectric horn of claim 1, wherein the suspension structure comprises a plurality of holes. The piezoelectric horn according to claim 1, wherein a damping coefficient of the suspension structure is greater than a damping coefficient of the sounding substrate.