CN216357300U

CN216357300U - Piezoelectric ceramic loudspeaker

Info

Publication number: CN216357300U
Application number: CN202122754066.8U
Authority: CN
Inventors: 倪济方
Original assignee: Jiangyin Fuding Communication Equipment Co ltd
Current assignee: Jiangyin Fuding Communication Equipment Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-04-19
Anticipated expiration: 2031-11-11

Abstract

The utility model provides a piezoelectric ceramic loudspeaker, which comprises a front cover and a shell; a circle of convex rings are arranged on the front surface of the front cover, and a plurality of sounding through holes are arranged in the convex rings on the front surface of the front cover; the back of the front cover is provided with a sleeve joint part, and the outer surface of the sleeve joint part is provided with an external thread; a filter screen is fixed on the bottom of the sleeve joint part; a circle of mounting ring is arranged at the upper part of the inner wall of the shell; an internal thread is arranged on the inner wall of the shell above the mounting ring, and the internal thread is matched with the external thread; the shell is sleeved on the sleeved part on the front cover through the matching of the internal thread and the external thread; the edge of the bottom of the shell is provided with a plurality of connecting blocks, and the connecting blocks are provided with first connecting through holes; the shell is internally provided with a piezoelectric ceramic sounding module. The piezoelectric ceramic loudspeaker provided by the utility model can effectively prevent external dust from entering the shell, and the service life of the piezoelectric ceramic loudspeaker is prolonged.

Description

Piezoelectric ceramic loudspeaker

Technical Field

The utility model relates to the technical field of loudspeakers, in particular to a piezoelectric ceramic loudspeaker.

Background

The piezoelectric ceramic speaker is an electroacoustic transducer for realizing electro-mechanical-acoustic conversion by the inverse piezoelectric effect of a piezoelectric sheet, and is widely applied to portable equipment terminals. When the piezoelectric ceramic loudspeaker has audio signal input, the vibration component of the piezoelectric ceramic loudspeaker generates corresponding stretching or contraction movement, so that air is pushed, and sound is radiated.

Chinese utility model patent with publication number CN213635347U discloses a multilayer piezoelectric automobile loudspeaker, including column type casing and sound production unit, the casing has the back lid, and the sound production unit has two sets ofly, connects in parallel on two sound production unit circuits, sets up a set of sound production unit in casing and the back lid respectively. It adopts multilayer piezoceramics and has compatible bee calling organ's sound production requirement, also satisfied the emergence requirement of car loudspeaker high sound intensity, can also simulate the engine and carry out the continuous sound production, provide the warning sound of traveling for electric automobile, the column type casing does benefit to the installation more, the loss rate of piezoelectric loudspeaker potsherd has been improved, and through the improvement to the shell structure and settle in the sound intracavity has multilayer piezoceramics piece about two sound producing units and sound producing unit have, and the structure is simple monomer more, overall structure is small and exquisite and be favorable to the sound, wide suitability has in the piezoelectric loudspeaker field. However, the sound emitting holes of the loudspeaker are only arranged in a circle, so that the sound emitting holes are relatively few, the sound emitting loudness is influenced, and in addition, dust easily enters the shell to damage internal components of the loudspeaker.

In view of the above, it is desirable to provide a piezoelectric ceramic speaker.

SUMMERY OF THE UTILITY MODEL

In order to achieve the above object of the present invention, the present invention provides a piezoelectric ceramic speaker, which includes a front cover and a housing;

a circle of raised ring is arranged on the front surface of the front cover, and a plurality of sounding through holes are arranged in the raised ring on the front surface of the front cover; the back surface of the front cover is provided with a sleeve joint part, and the outer surface of the sleeve joint part is provided with an external thread; a filter screen is fixed on the bottom of the sleeve joint part;

a circle of mounting ring is arranged at the upper part of the inner wall of the shell; an internal thread is arranged on the inner wall of the shell above the mounting ring, and the internal thread is matched with the external thread; the shell is sleeved on the sleeved part on the front cover through the matching of the internal thread and the external thread; the edge of the bottom of the shell is provided with a plurality of connecting blocks, and the connecting blocks are provided with first connecting through holes; and a piezoelectric ceramic sounding module is arranged in the shell.

Preferably, the edge position of the bottom of the sleeve joint part is provided with a plurality of threaded holes, a plurality of screws matched with the threaded holes are arranged on the frame of the filter screen, and the filter screen is fixed at the bottom of the sleeve joint part through the screws.

Preferably, the piezoelectric ceramic sound production module comprises a vibrating diaphragm and a piezoelectric ceramic piece; a glue layer is arranged on the lower surface of the side of the mounting ring, and the vibrating diaphragm is bonded on the lower surface of the mounting ring through the glue layer; the piezoelectric ceramic piece is arranged on the lower surface of the vibrating diaphragm, and positive and negative leads are arranged on the piezoelectric ceramic piece.

Preferably, the material of the diaphragm is a resin film.

Preferably, a metal shell is further arranged on the lower surface of the diaphragm, and the metal shell covers the piezoelectric ceramic plate.

Preferably, a plurality of second connecting through holes are formed in the edge position of the front face of the front cover.

The piezoelectric ceramic loudspeaker has the following beneficial effects:

(1) the piezoelectric ceramic loudspeaker has the advantages that external dust can be effectively prevented from entering the shell, the service life of the piezoelectric ceramic loudspeaker is prolonged, and the piezoelectric ceramic loudspeaker is good in sound production effect;

(2) simple structure and convenient use.

Drawings

Fig. 1 is a schematic structural diagram 1 of a front cover in the present embodiment;

FIG. 2 is a schematic structural view of the front cover in the present embodiment 2;

FIG. 3 is a schematic structural view of the connection between the front cover and the filter net in this embodiment;

fig. 4 is a schematic structural view of the housing in the present embodiment;

FIG. 5 is a sectional view of the housing in the present embodiment;

FIG. 6 is an enlarged view of a portion A of FIG. 5;

fig. 7 is a schematic structural diagram of a piezoelectric ceramic speaker according to this embodiment.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 7, a piezoelectric ceramic speaker includes a front cover 1 and a housing 10;

as shown in fig. 1, a circle of convex ring 2 is arranged on the front surface of the front cover 1, and a plurality of sounding through holes 3 are arranged in the convex ring 2 on the front surface of the front cover 1; as shown in fig. 2 and 3, a sleeve joint part 5 is arranged on the back surface of the front cover 1, and an external thread 7 is arranged on the outer surface of the sleeve joint part 5; and a filter screen 8 is fixed on the bottom of the sleeve joint part 5. Specifically, the edge position of the bottom of the sleeve-joint part 5 is provided with a plurality of threaded holes 6, a plurality of screws 9 matched with the threaded holes 6 are arranged on the frame of the filter screen 8, and the filter screen 8 is fixed at the bottom of the sleeve-joint part 5 through the screws 9 to play a role in preventing dust.

As shown in fig. 4, a ring of mounting rings 14 is arranged on the upper part of the inner wall of the housing 10; an internal thread 13 is arranged on the inner wall of the shell 10 above the mounting ring 14, and the internal thread 13 is matched with the external thread 7; the shell 10 is sleeved on the sleeve joint part 5 on the front cover 1 through the matching of the internal thread and the external thread. A plurality of connecting blocks 11 are arranged at the edge of the bottom of the shell 10, and first connecting through holes 12 are formed in the connecting blocks 11 and used for being fixed with external fixing equipment; a piezoelectric ceramic sounding module is arranged in the shell 10.

In this embodiment, as shown in fig. 5 and fig. 6, the piezoelectric ceramic sound generating module includes a diaphragm 15 and a piezoelectric ceramic sheet 17; a glue layer 18 is arranged on the lower surface of the side of the mounting ring 14, and the vibrating diaphragm 15 is bonded on the lower surface of the mounting ring 14 through the glue layer 18; in this embodiment, the vibrating diaphragm 15 is made of a resin film, and is durable on the premise that the vibration and sound production of the vibrating diaphragm is not affected. The piezoelectric ceramic piece 17 is arranged on the lower surface of the vibrating diaphragm 15, and positive and negative leads are arranged on the piezoelectric ceramic piece 17.

In order to protect the piezoelectric ceramic to a certain extent, a metal shell 16 is further disposed on the lower surface of the diaphragm 15, and the piezoelectric ceramic 17 is covered by the metal shell 16.

When in use, external dust is blocked by the filter screen 8 on the front cover 1 and cannot enter the shell 10; the filter screen 8 realizes detachable connection, is convenient to replace and maintain, and the piezoelectric ceramic piece 17 on the piezoelectric ceramic sounding module is positioned in the metal shell 16 and is not easy to damage. And a plurality of sounding through holes 3 are arranged in the convex ring 2 on the front cover 1, so that the loudness of the loudspeaker is improved.

In addition, in order to further firmly fix the loudspeaker on the external equipment, a plurality of second connecting through holes 4 are arranged at the edge position of the front surface of the front cover 1, and the front cover 1 on the loudspeaker is fixed with the external equipment through the second connecting through holes 4, so that the connection stability of the front cover is further improved.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the utility model is not limited to the embodiments disclosed, but is capable of various modifications and substitutions without departing from the spirit of the utility model.

Claims

1. A piezoelectric ceramic loudspeaker is characterized by comprising a front cover and a shell;

2. The piezoceramic loudspeaker according to claim 1, wherein the edge of the bottom of the sleeve joint part is provided with a plurality of threaded holes, the frame of the filter screen is provided with a plurality of screws matched with the threaded holes, and the filter screen is fixed at the bottom of the sleeve joint part through the screws.

3. The piezoceramic loudspeaker according to claim 1 or 2, wherein the piezoceramic sound generating module comprises a diaphragm and a piezoceramic sheet; a glue layer is arranged on the lower surface of the side of the mounting ring, and the vibrating diaphragm is bonded on the lower surface of the mounting ring through the glue layer; the piezoelectric ceramic piece is arranged on the lower surface of the vibrating diaphragm, and positive and negative leads are arranged on the piezoelectric ceramic piece.

4. The piezoelectric ceramic speaker as claimed in claim 3, wherein the diaphragm is made of a resin film.

5. The piezoceramic loudspeaker according to claim 4, wherein a metal shell is further disposed on the lower surface of the diaphragm, and the metal shell covers the piezoceramic sheet.

6. The piezoceramic loudspeaker according to claim 1, wherein a plurality of second connecting through holes are formed at the edge position of the front surface of the front cover.