Laminated piezoelectric ceramic horn with blower device

Abstract

The utility model relates to a laminated piezoelectric ceramic horn with a blower device. The laminated piezoelectric ceramic horn comprises a loudspeaker shell and a vibration base material arranged on the loudspeaker shell, the vibration base material is of a film-shaped sheet structure, a laminated piezoelectric ceramic piece is arranged on the vibration base material, the laminated piezoelectric ceramic piece inputs sine wave audio electric signals and then drives the vibration base material to conduct up-down bending deformation vibration along with the frequency of the audio electric signals, air flow is pushed to produce sound, and the loudspeaker sound amplification effect is achieved. The vibration base material is arranged on the opening of the loudspeaker shell, and a blast accommodating cavity is formed between the vibration base material and the loudspeaker shell, so that enough space is provided when the vibration base material vibrates and deforms; the loudspeaker shell is provided with an air inlet hole and an air outlet hole, so that the vibration base material can freely vibrate in the air blowing containing cavity. The laminated piezoelectric ceramic horn with the blower device is good in tone quality, thin in body, flat, low in power consumption and wide in range, and has a blower function.

Description

Technical Field

[0001] The utility model relates to the application field of piezoelectric ceramics, in particular to a laminated piezoelectric ceramic horn with a blast device. Background Art

[0002] The rapid development of electronic product technology and the trend of new components to become thinner are the development trends of modern electronic equipment. The speakers with piezoelectric components currently used in the market are mainly used as buzzer alarms due to the narrow range of sound that can be played. Due to the setting of magnets, coils and other structures, electromagnetic dynamic speakers usually have a certain thickness and have leakage magnetic interference problems. They need to be shielded from magnetic fields, which is not conducive to the miniaturization and thinning of current electronic equipment products.

[0003] At the same time, thin and light audio electronic equipment products, due to their small structural space and dense layout of accessories, are prone to heat accumulation, affecting product performance. If they can also have air blowing to dissipate heat for electronic equipment products, it will be more conducive to the miniaturization and thinning of electronic equipment products. Summary of the invention

[0004] In order to overcome at least one of the above problems, the utility model provides a laminated piezoelectric ceramic speaker with a blowing device, which has good sound quality, a thin body, a flat shape, low power consumption, a wide sound range, and a blowing function.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a laminated piezoelectric ceramic speaker with a blowing device, comprising a speaker housing and a vibration substrate arranged on the speaker housing;

[0006] The vibration substrate is a membrane-like thin sheet structure, on which a laminated piezoelectric ceramic sheet is arranged. After a sinusoidal audio signal is input to the laminated piezoelectric ceramic sheet, the vibration substrate is driven to bend and deform up and down according to the frequency of the audio signal, thereby pushing the air flow to produce sound to achieve the sound amplification effect of the speaker.

[0007] The vibration substrate is arranged on the opening of the speaker housing, and a blast receiving chamber is formed between the vibration substrate and the speaker housing, so that there is enough space for the vibration substrate to vibrate and deform;

[0008] The speaker housing is respectively provided with an air inlet and an air outlet so that the vibration substrate can vibrate freely in the air blast accommodation chamber.

[0009] Preferably, the vibration substrate is a resin film.

[0010] Preferably, the speaker housing is a thin box structure.

[0011] Preferably, the air inlet and the air outlet are respectively provided with air valve membranes.

[0012] Preferably, the air valve membrane includes a fixed ring portion, a vibration center portion and a ventilation hollow portion; a hollow portion is formed between the fixed ring portion and the vibration center portion, and a plurality of connecting portions are arranged between the fixed ring portion and the vibration center portion; the connecting portion is provided with a bending structure so that the vibration center portion can vibrate and displace up and down.

[0013] Preferably, the air inlet hole is in contact with the bottom surface of the vibration center of the air valve membrane, and the air valve membrane is located inside the speaker housing. When the vibration substrate vibrates to increase the air blast chamber, the air valve membrane is subjected to suction, and the vibration center is displaced upward to open the air inlet hole, and the gas enters the air blast chamber through the ventilated hollow portion. When the vibration substrate vibrates to reduce the air blast chamber, the air valve membrane is subjected to pressure, and the vibration center is in contact with the air inlet hole to close the air inlet hole, thereby providing a one-way air inlet function.

[0014] Preferably, the exhaust port comprises an exhaust card seat, an exhaust pipe port, a diaphragm and an air valve membrane; the diaphragm is arranged at the upper opening of the exhaust card seat, separates the exhaust card seat from the air blast accommodating chamber, and forms an exhaust valve chamber in the exhaust card seat; the air valve membrane is arranged in the exhaust valve chamber, closely attached to the lower end surface of the diaphragm, a vent hole is arranged in the middle of the diaphragm, and the vibration center of the air valve membrane is attached to the vent hole in the middle of the diaphragm; the exhaust pipe port communicates with the exhaust valve chamber and the outside of the speaker housing;

[0015] When the vibration substrate vibrates to shrink the air accommodating chamber, the air valve membrane is under pressure, the vibration center moves downward, the vent hole of the diaphragm is opened, and the gas is squeezed into the exhaust valve chamber and discharged through the exhaust pipe port;

[0016] When the vibration substrate vibrates to enlarge the air accommodating chamber, the air valve membrane in the exhaust valve chamber is sucked and closely adheres to the vent hole of the diaphragm to close the vent hole, thus having a one-way exhaust function.

[0017] Preferably, the speaker further comprises an outer cover, which is mounted on the opening of the speaker housing, and a gap is provided between the outer cover and the vibration substrate; and an air intake hole is provided on the outer cover.

[0018] The beneficial effects of the utility model are: a laminated piezoelectric ceramic speaker with a blasting device, the speaker housing of which is a thin box structure, the structure is light and thin, and is suitable for the installation environment of miniaturized and thin electronic equipment products. It is suitable for electronic equipment products that need to be light and thin and need to play audio, and at the same time has the function of blowing to dissipate heat for electronic equipment products. It also solves the problem of narrow sound directivity of traditional speakers, and achieves good sound quality, thin body, flatness, low power consumption, wide sound range, no electromagnetic moving coil, no leakage magnetic interference problem, saves anti-magnetic costs, has a simple structure, and is easy to apply and install in electronic equipment products that need to be light and thin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the laminated piezoelectric ceramic speaker with a blasting device described in the utility model;

[0021] Figure 2 It is a schematic diagram of the back structure of the laminated piezoelectric ceramic speaker with a blast device described in the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the air valve membrane of the laminated piezoelectric ceramic speaker with a blowing device described in the utility model;

[0023] Figure 4 It is a schematic diagram of the disassembled structure of the laminated piezoelectric ceramic speaker with a blasting device described in the utility model;

[0024] Figure 5 It is a schematic cross-sectional structure diagram of the laminated piezoelectric ceramic speaker with a blasting device described in the utility model;

[0025] Figure 6 It is a partial cross-sectional enlarged structural schematic diagram of the laminated piezoelectric ceramic speaker with a blasting device described in the utility model;

[0026] Figure 7 It is a schematic diagram of the suction state of the laminated piezoelectric ceramic speaker with a blowing device described in the utility model;

[0027] Figure 8 It is a schematic diagram of the exhaust state of the laminated piezoelectric ceramic horn with a blowing device described in the utility model.

[0028] Description of the drawings: 1. Speaker housing, 2. Vibration substrate, 3. Laminated piezoelectric ceramic sheet, 4. Air valve membrane, 41. Fixed ring portion, 42. Vibration center portion, 43. Connecting portion, 44. Ventilation hollow portion, 5. Air inlet hole, 6. Exhaust port, 61. Exhaust card seat, 62. Exhaust pipe port, 63. Spacer, 64. Exhaust valve cavity, 7. FPC board. DETAILED DESCRIPTION

[0029] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0030] Example

[0031] like Figure 1 , 2 As shown: a laminated piezoelectric ceramic speaker with a blowing device is composed of a speaker housing 1 and a vibration substrate 2. The speaker housing 1 is a thin box structure with an open structure on the upper end surface and a concave cavity inside.

[0032] The vibration substrate 2 is a membrane-like thin film structure, on which a laminated piezoelectric ceramic sheet 3 is arranged. After a sinusoidal audio electrical signal is input, the laminated piezoelectric ceramic sheet 3 drives the vibration substrate 2 to bend and deform up and down according to the frequency of the audio electrical signal, thereby pushing the air flow to produce sound and achieve the speaker sound amplification effect.

[0033] The vibration substrate 2 is disposed on the opening of the speaker housing 1 , and an air blast receiving chamber is formed between the vibration substrate 2 and the speaker housing 1 , so that there is enough space for the vibration substrate 2 to vibrate and deform.

[0034] See also Figure 4 The speaker housing 1 is provided with an air inlet 5 and an air outlet 6, respectively, so that the vibration substrate 2 can vibrate freely in the air blowing chamber and discharge air at the air outlet 6 to achieve the air blowing effect.

[0035] The structure is thin, flat, and simple, and can be easily applied and installed in electronic equipment products that require thinness.

[0036] In this embodiment, electrodes are printed on the surface of the laminated piezoelectric ceramic sheet 3 , and the laminated piezoelectric ceramic sheet 3 is connected to the electrodes through the FPC board 7 , and then connected to the external audio electrical signal.

[0037] The vibration substrate 2 is a resin film. The laminated piezoelectric ceramic sheet 3 is attached to the vibration substrate 2. In this embodiment, the laminated piezoelectric ceramic sheet 3 is attached to the vibration substrate 2 by double-sided adhesive. Since it has no electromagnetic moving coil, the structure is simple, there is no leakage magnetic interference problem, and the anti-magnetic cost is saved.

[0038] The speaker housing 1 is a thin box structure, which is light and thin, and is suitable for the installation environment of miniaturized and thin electronic equipment products. However, dynamic speakers usually have a certain thickness, which is not conducive to the miniaturization and thinning of current electronic equipment products.

[0039] In this embodiment, the air inlet 5 and the air outlet 6 are respectively provided with air valve membranes 4 for controlling one-way air intake and one-way air exhaust, respectively.

[0040] In this embodiment, see Figure 3 The air valve membrane 4 includes a fixed ring portion 41, a vibration center portion 42 and a ventilation hollow portion 44; a hollow portion is formed between the fixed ring portion 41 and the vibration center portion 42, and a plurality of connecting portions 43 are provided between the fixed ring portion 41 and the vibration center portion 42; the connecting portion 43 is provided with a bending structure so that the vibration center portion 42 can vibrate and displace up and down. There are three connecting portions 43, and the bending structure thereof provides an elastic space for deformation, so that the vibration center can be displaced up and down.

[0041] See also Figure 4 and Figure 7The air inlet hole 5 is in contact with the bottom surface of the vibration center portion 42 of the air valve membrane 4. The air valve membrane 4 is located inside the speaker housing 1. When the vibration substrate 2 vibrates to increase the air blast accommodating chamber, the air valve membrane 4 is subjected to suction, and the vibration center portion 42 moves upward, opening the air inlet hole 5, and the gas enters the air blast accommodating chamber through the ventilation hollow portion 44; when the vibration substrate 2 vibrates to reduce the air blast accommodating chamber, the air valve membrane 4 is subjected to pressure, and the vibration center portion 42 is in contact with the air inlet hole 5, closing the air inlet hole 5, thereby having a one-way air intake function.

[0042] See also Figure 5 , 6 The exhaust port 6 includes an exhaust card seat 61, an exhaust pipe port 62, a spacer 63 and an air valve membrane 4; the spacer 63 is arranged at the upper opening of the exhaust card seat 61 to separate the exhaust card seat 61 from the air blast accommodating chamber, and an exhaust valve chamber 64 is formed in the exhaust card seat 61; the air valve membrane 4 is arranged in the exhaust valve chamber 64, tightly attached to the lower end surface of the spacer 63, and a vent is arranged in the middle of the spacer 63, and the vibration center 42 of the air valve membrane 4 is attached to the vent in the middle of the spacer 63; the exhaust pipe port 62 connects the exhaust valve chamber 64 with the outside of the speaker housing 1.

[0043] See also Figure 6 and Figure 8 When the vibration substrate 2 vibrates to shrink the blast chamber, the air valve membrane 4 is under pressure, the vibration center 42 moves downward, opens the vent hole of the diaphragm 63, and squeezes the gas into the exhaust valve chamber 64 and discharges it through the exhaust pipe port 62; when the vibration substrate 2 vibrates to expand the blast chamber, the air valve membrane 4 in the exhaust valve chamber 64 is sucked and clings to the vent hole of the diaphragm 63, closing the vent hole, which has a one-way exhaust function. During continuous operation, the exhaust pipe port 62 continuously exhausts air to form a blast effect, which can be used for internal cooling of electronic equipment products, and has a dual-purpose effect.

[0044] The laminated piezoelectric ceramic speaker with a blasting device described in the utility model has a speaker housing of a thin box structure, which is light and thin and is suitable for the installation environment of miniaturized and thin electronic equipment products. It is suitable for electronic equipment products that need to be light and thin and need to play audio, and at the same time has the function of blowing air to dissipate heat for electronic equipment products. It also solves the problem of narrow directivity of sound emission of traditional speakers, and achieves good sound quality, thin body, flatness, low power consumption, wide sound range, no electromagnetic moving coil, no leakage magnetic interference problem, saves anti-magnetic costs, has a simple structure, and is easy to apply and install in electronic equipment products that need to be light and thin.

[0045] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A laminated piezoelectric ceramic speaker with a blasting device, characterized in that: It includes a speaker housing and a vibration substrate arranged on the speaker housing; The vibration substrate is a membrane-like thin sheet structure, on which a laminated piezoelectric ceramic sheet is arranged. After a sinusoidal audio signal is input to the laminated piezoelectric ceramic sheet, the vibration substrate is driven to bend and deform up and down according to the frequency of the audio signal, thereby pushing the air flow to produce sound to achieve the sound amplification effect of the speaker. The vibration substrate is arranged on the opening of the speaker housing, and a blast receiving chamber is formed between the vibration substrate and the speaker housing, so that there is enough space for the vibration substrate to vibrate and deform; The speaker housing is respectively provided with an air inlet and an air outlet so that the vibration substrate can vibrate freely in the air blast accommodation chamber.

2. The laminated piezoelectric ceramic speaker with a blowing device according to claim 1, characterized in that: The vibration substrate is a resin film.

3. The laminated piezoelectric ceramic speaker with a blowing device according to claim 1, characterized in that: The speaker housing is a thin box structure.

4. The laminated piezoelectric ceramic speaker with a blowing device according to claim 1, characterized in that: The air inlet and the air outlet are respectively provided with air valve membranes.

5. The laminated piezoelectric ceramic speaker with a blowing device according to claim 4, characterized in that: The air valve membrane includes a fixed ring portion, a vibration center portion and a ventilation hollow portion; a hollow portion is formed between the fixed ring portion and the vibration center portion, and a plurality of connecting portions are arranged between the fixed ring portion and the vibration center portion; the connecting portion is provided with a bending structure so that the vibration center portion can vibrate and displace up and down.

6. The laminated piezoelectric ceramic speaker with a blowing device according to claim 5, characterized in that: The air inlet hole is in contact with the bottom surface of the vibration center of the air valve membrane. The air valve membrane is located inside the speaker housing. When the vibration substrate vibrates to increase the air blast chamber, the air valve membrane is subjected to suction, and the vibration center is displaced upward to open the air inlet hole, and gas enters the air blast chamber through the ventilated hollow part. When the vibration substrate vibrates to reduce the air blast chamber, the air valve membrane is subjected to pressure, and the vibration center is in contact with the air inlet hole to close the air inlet hole, thereby providing a one-way air inlet function.

7. The laminated piezoelectric ceramic speaker with a blowing device according to claim 6, characterized in that: The exhaust port includes an exhaust card seat, an exhaust pipe port, a diaphragm and an air valve membrane; the diaphragm is arranged at the upper opening of the exhaust card seat, separates the exhaust card seat from the air blast receiving chamber, and forms an exhaust valve chamber in the exhaust card seat; the air valve membrane is arranged in the exhaust valve chamber, closely attached to the lower end surface of the diaphragm, a vent hole is arranged in the middle of the diaphragm, and the vibration center of the air valve membrane is attached to the vent hole in the middle of the diaphragm; the exhaust pipe port communicates with the exhaust valve chamber and the outside of the speaker housing; When the vibration substrate vibrates to shrink the air accommodating chamber, the air valve membrane is under pressure, the vibration center moves downward, the vent hole of the diaphragm is opened, and the gas is squeezed into the exhaust valve chamber and discharged through the exhaust pipe port; When the vibration substrate vibrates to enlarge the air accommodating chamber, the air valve membrane in the exhaust valve chamber is sucked and closely adheres to the vent hole of the diaphragm to close the vent hole, thus having a one-way exhaust function.

Images