CN219832171U

CN219832171U - Piezoelectric sounder

Info

Publication number: CN219832171U
Application number: CN202320922698.7U
Authority: CN
Inventors: 汤礼东; 吕文斌; 忻峰
Original assignee: Ningbo East Electronics Co ltd
Current assignee: Ningbo East Electronics Co ltd
Priority date: 2023-04-19
Filing date: 2023-04-19
Publication date: 2023-10-13
Anticipated expiration: 2033-04-19

Abstract

The utility model relates to the technical field of sounders, in particular to a piezoelectric sounder, which comprises a piezoelectric sheet and a shell with an opening, wherein the opening is used for the piezoelectric sheet to enter the shell, the piezoelectric sheet is fixedly connected in the shell, and the peripheral wall of the piezoelectric sheet is adhered to the inner wall of the shell; the bottom surface of the shell is also provided with a limit step which is in a ring shape and is used for supporting the piezoelectric sheet, so that a gap for vibrating the piezoelectric sheet is formed between the bottom surface of the shell and the piezoelectric sheet; the peripheral wall of the piezoelectric sheet is adhered to the inner wall of the shell, the installation speed of the piezoelectric sheet is greatly accelerated by the edge adhesion type installation mode, after the piezoelectric sheet enters the shell, the piezoelectric sheet can be installed by only abutting against the limiting step, the installation speed is further improved, and compared with the sounder in the prior art, the sounder disclosed by the utility model has the advantages that the bottom cover structure is saved, the structure is simpler, and therefore, the manufacturing cost of the sounder disclosed by the utility model is greatly reduced.

Description

Piezoelectric sounder

Technical Field

The utility model relates to the technical field of sounders, in particular to a piezoelectric sounder.

Background

The piezoelectric sounder is an electroacoustic conversion device and is commonly used in indoor safety alarms such as carbon monoxide alarms and smoke alarms; the working principle is that the piezoelectric material is stuck on the metal sheet, and when a voltage is applied to the two ends of the piezoelectric material and the metal sheet, the sounder can generate mechanical deformation to make sound due to the reverse voltage effect.

Chinese patent CN201838308U discloses a piezoelectric sounder, which comprises a casing with an opening, a piezoelectric sheet, a circuit printed board and a bottom cover, wherein the top of the casing is provided with a sound hole, when the sounder is installed, the piezoelectric sheet needs to be glued into the casing, then the piezoelectric sheet and the circuit printed board are connected, after the completion, a wire is led out, and finally the bottom cover is fixed at the opening; the disadvantage is that the structure of the sounder is complex and the installation process is cumbersome, resulting in a higher manufacturing cost of the sounder.

Disclosure of Invention

The utility model provides a piezoelectric type sounder, which aims to solve the problem that the manufacturing cost of the sounder is high due to complex structure and complicated installation process of the sounder in the prior art.

A piezoelectric sounder comprises a piezoelectric sheet and a housing having a circular opening for the piezoelectric sheet to enter the interior of the housing,

the piezoelectric sheet is fixedly connected in the shell, and the peripheral wall of the piezoelectric sheet is bonded with the inner wall of the shell;

the bottom surface of casing still is equipped with a spacing step, spacing step is the ring form, spacing step is used for supplying the piezoelectric plate supports and leans on, so that the bottom surface of casing with form the space that supplies the piezoelectric plate vibrations between the piezoelectric plate.

The loudspeaker has the advantages and beneficial effects that: the peripheral wall of the piezoelectric sheet is adhered to the inner wall of the shell, and the installation speed of the piezoelectric sheet is greatly increased by the edge adhesion type installation mode; after the piezoelectric sheet enters the shell, the piezoelectric sheet can be installed by only abutting against the limiting step, so that the installation speed is further improved, a gap is formed between the piezoelectric sheet and the bottom surface of the shell, the gap is used for vibration of the piezoelectric sheet after the piezoelectric sheet is electrified, and compared with the sounder in the prior art, the sounder disclosed by the utility model has the advantages that the bottom cover structure is saved, the structure is simpler, and the manufacturing cost of the sounder disclosed by the utility model is greatly reduced.

Preferably, the piezoelectric sheet comprises a conductive substrate and a conductive ceramic sheet, wherein the ceramic sheet is fixedly connected to the lower end face of the substrate and is positioned in the middle of the metal sheet, and the peripheral wall of the substrate is bonded with the inner wall of the shell. The ceramic plate is fixedly connected to the lower end of the substrate, so that the connecting wire can be conveniently fixed and led out.

Preferably, the substrate further comprises a first wire and a second wire, one end of the first wire is electrically connected to the substrate, the other end of the first wire is electrically connected to an external controller, one end of the second wire is electrically connected to the ceramic chip, and the other end of the second wire is electrically connected to the external controller. In this way, when a voltage is applied to the substrate and the ceramic sheet, the piezoelectric sheet is mechanically deformed to generate a sound due to the reverse voltage effect.

Preferably, the ceramic sheet comprises a first silver layer, a ceramic layer and a second silver layer which are fixedly connected in sequence from top to bottom, and the second lead is electrically connected to the second silver layer. By the arrangement, compared with the substrate in the prior art, the frequency response of the piezoelectric sheet can be improved by adopting the structural mode.

Preferably, the substrate is made of copper, nickel or steel. This arrangement may allow the substrate to have some electrical conductivity.

Preferably, a wire clamping groove is formed in the lower end face of the shell, and a through groove for the first wire and the second wire to pass through is formed in the wire clamping groove. The arrangement is that the first lead and the second lead can pass through the through groove and are fixed through the wire clamping groove, so that the circuit layout is more reasonable.

Preferably, a plurality of ear plates are arranged on the peripheral wall of the shell, and a mounting hole for fixed connection is arranged in the middle of each ear plate. By the arrangement of the lug plates, the installation firmness of the shell is improved.

Drawings

FIG. 1 is an exploded schematic view of a sounder of the present utility model;

FIG. 2 is an isometric view of a sounder of the present utility model;

fig. 3 is a schematic cross-sectional view of a piezoelectric sheet of the present utility model.

Wherein, the liquid crystal display device comprises a liquid crystal display device,

1. a piezoelectric sheet; 2. an opening; 3. a housing; 4. a limit step; 5. a first wire; 6. a second wire; 7. wire clamping groove; 8. a through groove; 9. ear plates; 10. a mounting hole; 101. a substrate; 102. a ceramic sheet; 1021. a first silver layer; 1022. a ceramic layer; 1023. and a second silver layer.

Detailed Description

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

Referring to fig. 1, a piezoelectric sounder comprises a piezoelectric sheet 1 and a housing 3 having an opening 2 for allowing the piezoelectric sheet 1 to enter the interior of the housing 3, characterized in that,

the piezoelectric sheet 1 is fixedly connected in the shell 3, and the outer peripheral wall of the piezoelectric sheet 1 is adhered to the inner wall of the shell 3;

the bottom surface of casing 3 still is equipped with a spacing step 4, and spacing step 4 is the ring, and spacing step 4 is used for supplying piezoelectric plate 1 to support and lean on to form the space that supplies piezoelectric plate 1 vibrations between the bottom surface of casing 3 and piezoelectric plate 1.

Specifically, the outer peripheral wall of the piezoelectric sheet 1 is adhered to the inner wall of the shell 3, and the mounting speed of the piezoelectric sheet 1 is greatly increased by the edge-adhered mounting mode, and the piezoelectric sheet 1 is preferably adhered to the inner wall of the shell 3 through 703B adhesive; after the piezoelectric sheet 1 enters the shell 3, the piezoelectric sheet 1 can be installed by only abutting against the limiting step 4, so that the installation speed is further improved, and compared with the sounder in the prior art, the sounder disclosed by the utility model also saves a bottom cover structure, and is simpler in structure, so that the manufacturing cost of the sounder disclosed by the utility model is greatly reduced.

Specifically, the thickness of the shell 3 can be reduced to 5mm by adopting the sounder of the utility model, and the edge bonding type mounting mode of the piezoelectric sheet 1 can not only improve the mounting speed of the piezoelectric sheet 1, but also improve the frequency response, and the thickness of the piezoelectric sheet 1 is about 0.2 mm-0.3 mm, preferably about 0.2mm, compared with the piezoelectric sheet 1 in the prior art, the piezoelectric sheet 1 adopting the utility model has the characteristics of low frequency response and high frequency bandwidth.

In the preferred embodiment of the present utility model, the piezoelectric sheet 1 comprises a conductive substrate 101 and a conductive ceramic sheet 102, wherein the ceramic sheet 102 is fixedly connected to the lower end surface of the substrate 101 and is located in the middle of the metal sheet, and the outer peripheral wall of the substrate 101 is bonded to the inner wall of the housing 3.

Specifically, the ceramic plate 102 is fixedly connected to the lower end of the substrate 101, so that the connection wires can be conveniently fixed and led out.

As shown in fig. 1 and fig. 2, to further optimize the above scheme, the device further includes a first conductive wire 5 and a second conductive wire 6, wherein one end of the first conductive wire 5 is fixedly connected to the substrate 101, the other end is used for being electrically connected to an external controller, one end of the second conductive wire 6 is fixedly connected to the ceramic plate 102, and the other end is used for being electrically connected to the external controller.

Specifically, when a voltage is applied to the substrate 101 and the ceramic sheet 102, the piezoelectric sheet 1 is mechanically deformed to generate a sound due to the reverse voltage effect.

As shown in fig. 3, to further optimize the above scheme, the ceramic wafer 102 includes a first silver layer 1021, a ceramic layer 1022, and a second silver layer 1023 fixedly connected in sequence from top to bottom, and the second conductive wire 6 is electrically connected to the second silver layer 1023.

Specifically, compared with the substrate 101 in the prior art, the frequency response of the piezoelectric sheet 1 can be improved by adopting the structural mode, the first silver layer 1021 is fixed on the lower end face of the substrate 101 in a glue connection mode, the ceramic layer 1022 is fixed on the lower end face of the first silver layer 1021 in a glue connection mode, and the second silver layer 1023 is fixedly connected on the lower end face of the ceramic sheet 1022 in a glue connection mode.

To further optimize the above, the substrate 101 is made of copper, nickel or steel.

In particular, copper, nickel or steel may provide the substrate 101 with a certain electrical conductivity.

In the preferred embodiment of the present utility model, a wire clamping groove 7 is formed on the lower end surface of the housing 3, and a through groove 8 for passing the first wire 5 and the second wire 6 is formed on the wire clamping groove 7.

Specifically, the first wire 5 and the second wire 6 can pass through the through groove 8, fix through the card wire groove 7, make circuit layout more rationalized, after the first wire 5 and the second wire 6 pass through the through groove 8, block through the convex structure on the through groove 8, this convex structure is the same with the external diameter of the first wire 5 and the second wire 6, make the joint more firm, simultaneously for better threading, still be equipped with opening 2 on the card wire groove 7, the first wire 5 and the second wire 6 can very convenient penetrate through groove 8, after two wires all penetrate, can fix the first wire 5 and the second wire 6 in through groove 8 department with the help of the elasticity of wire.

In the preferred embodiment of the utility model, a plurality of ear plates 9 are arranged on the peripheral wall of the shell 3, and the middle part of each ear plate 9 is provided with a mounting hole 10 for fixed connection.

Specifically, through the setting of otic placode 9, install casing 3 in corresponding equipment behind the fastener passing mounting hole 10, not only increased the installation fastness of casing 3 through the design of otic placode 9, saved the space of equipment simultaneously, the quantity of preferred otic placode 9 is two.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solution of the present utility model, and not limiting thereof; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A piezoelectric sounder comprising a piezoelectric sheet (1) and a housing (3) having an opening (2), said opening (2) being adapted for the piezoelectric sheet (1) to enter the interior of said housing (3), characterized in that,

the piezoelectric sheet (1) is fixedly connected in the shell (3), and the peripheral wall of the piezoelectric sheet (1) is bonded with the inner wall of the shell (3);

the bottom surface of casing (3) still is equipped with a spacing step (4), spacing step (4) are the ring form, spacing step (4) are used for supplying piezoelectric plate (1) support and lean on, so that the bottom surface of casing (3) with form between piezoelectric plate (1) and supply the space that piezoelectric plate (1) shakes.

2. The piezoelectric sounder according to claim 1, wherein the piezoelectric sheet (1) comprises a conductive substrate (101) and a conductive ceramic sheet (102), the ceramic sheet (102) is fixedly connected to the lower end face of the substrate (101) and is located in the middle of the substrate (101), and the peripheral wall of the substrate (101) is bonded to the inner wall of the housing (3).

3. The piezoelectric sounder according to claim 2, further comprising a first wire (5) and a second wire (6), wherein one end of the first wire (5) is electrically connected to the substrate (101) and the other end is electrically connected to an external controller, and one end of the second wire (6) is electrically connected to the ceramic sheet (102) and the other end is electrically connected to the external controller.

4. A piezoelectric sounder according to claim 3, wherein the ceramic sheet (102) comprises a first silver layer (1021), a ceramic layer (1022) and a second silver layer (1023) fixedly connected in that order from top to bottom, the second wire (6) being electrically connected to the second silver layer (1023).

5. The piezoelectric sounder according to claim 4, wherein the substrate (101) is made of copper, nickel or steel.

6. The piezoelectric sounder according to any one of claims 3 to 5, wherein a wire clamping groove (7) is formed in the lower end face of the housing (3), and a through groove (8) through which the first wire (5) and the second wire (6) pass is formed in the wire clamping groove (7).

7. Piezoelectric sounder according to claim 1, characterized in that the peripheral wall of the housing (3) is provided with a plurality of ear plates (9), the middle part of each ear plate (9) being provided with a mounting hole (10) for fixed connection.