CN216249974U - Piezoelectric squealer - Google Patents

Abstract

The utility model discloses a piezoelectric sounder, which comprises: the lower end surface of the shell is open, and the upper end surface of the shell is provided with a sounding hole; the bottom cover is arranged at the bottom of the shell and seals the lower end face opening of the shell, and an accommodating space is formed between the bottom cover and the shell; the piezoelectric piece is fixedly arranged in the accommodating space; the electronic control assembly is arranged on the bottom cover, the piezoelectric sheet is electrically connected with the electronic control assembly through a lead, a plurality of pins corresponding to the piezoelectric sheet are electrically connected to the electronic control assembly, one ends of the pins, back to the bottom cover, extend out of the shell, and the heights of the pins are not higher than that of the shell. The utility model does not influence the sound production performance of the piezoelectric sounder, can reduce the whole volume and is convenient to install and use in the alarm.

Description

Piezoelectric squealer

Technical Field

The utility model relates to the technical field of piezoelectric squealers, in particular to a piezoelectric squealer.

Background

The piezoelectric sounder is widely applied to civil use and industry, and is mainly used for security protection, warning and other various purposes. The existing piezoelectric sounder mainly comprises a shell, a piezoelectric plate, a lead and a sounding hole. The sound wave generated by the vibration of the piezoelectric plate is reflected for multiple times in the cylindrical sound production cavity and then is emitted from the sound production hole, so that sound with higher decibel is generated. The utility model discloses a current utility model patent of grant bulletin number CN201054786Y discloses a piezoelectric type squealer, and the three utmost point of M, F, G on the piezoelectric patch is respectively through three lead wires and circuit-printed board electric connection, draws three piece circular metal pins on the circuit-printed board, the pin pass the bottom and draw forth to become an organic whole with bottom, circuit-printed board riveting. The piezoelectric sounder with the structure has the following defects in the actual use process: because the extended position of pin is in the bottom for the whole height-increasing of piezoelectric type squealer, to installing the piezoelectric type squealer structure inside the alarm, its structure volume is too big, is unfavorable for at the inside installation of the less alarm in space fixedly. In addition, the size of the casing cannot be reduced in order to not affect the product performance of the piezoelectric sounder.

SUMMERY OF THE UTILITY MODEL

The piezoelectric sounder has the advantages that the piezoelectric sounder does not influence the sounding performance of the piezoelectric sounder, can reduce the whole size, and is convenient to mount in the alarm.

The specific technical scheme is as follows:

a piezoelectric sounder comprising:

the lower end surface of the shell is open, and the upper end surface of the shell is provided with a sounding hole;

the bottom cover is arranged at the bottom of the shell and seals the lower end face opening of the shell, and an accommodating space is formed between the bottom cover and the shell;

the piezoelectric piece is fixedly arranged in the accommodating space;

the electronic control assembly is arranged on the bottom cover, the piezoelectric sheet is electrically connected with the electronic control assembly through a lead, a plurality of pins corresponding to the piezoelectric sheet are electrically connected to the electronic control assembly, one ends of the pins, back to the bottom cover, extend out of the shell, and the heights of the pins are not higher than that of the shell.

Compared with the prior art, the piezoelectric sounder comprises a shell, a bottom cover, a piezoelectric plate and an electric control assembly, wherein the bottom cover, the piezoelectric plate and the electric control assembly are all positioned in the shell, namely the volume of the piezoelectric sounder is the volume of the shell, and the whole volume of the piezoelectric generator is greatly reduced. In addition, a plurality of pins electrically connected with the electric control assembly extend out of the shell from one end back to the bottom cover instead of extending out of the bottom cover, if the pins extend out of the bottom cover, the length of the piezoelectric sounder can be greatly prolonged, namely the whole volume of the piezoelectric sounder is greatly increased, but the extending positions of the pins are changed, so that the extending space of the pins can be shared with the installation occupied space of the shell in the alarm, further, the height of the pins is not higher than the top height of the shell, the whole volume of the piezoelectric sounder is greatly reduced, the size of the shell of a product is not reduced, and the sound production performance of the piezoelectric sounder can be ensured.

As an improvement of the utility model, the shell is in a step shape and is divided into an upper shell and a lower shell, the diameter of the upper shell is smaller than that of the lower shell, and the side wall of the lower shell is provided with a convex shell for protecting the pins of the electronic control assembly, namely the pins extend out of the end surface of the convex shell. Furthermore, a plurality of threading holes for extending the pins are formed in the upper end face of the convex shell. Through the design of casing shape for the pin obtains the effective protection of convex shell, and the pin stretches out from the terminal surface of convex shell, and the pin extension is located the casing outside, can make the outside space of casing give the pin make full use of, has saved the installation space of piezoelectric type squealer in the inside of alarm.

And the upper end surface of the convex shell is provided with a plurality of threading holes for extending the pins, and a plurality of notches for clamping the lead wires are arranged in the convex shell close to the threading holes, so that the lead wires are not easy to disorder.

As an improvement of the utility model, a groove for accommodating the electric control assembly is formed in the upper end surface of the bottom cover, and a positioning pin for positioning the electric control assembly is arranged in the groove. Through the design, the electric control assembly is fixedly arranged on the bottom cover.

And the two sides of the groove are provided with first vacancy avoiding positions for taking and placing the electric control assembly. Through this design, be convenient for the getting of automatically controlled subassembly in the recess and put.

And in the improvement, one end part of the groove is provided with a second vacancy avoiding position for accommodating the end part of the pin. Through the design, the welding point at the bottom of the pin is provided with an accommodating space.

As an improvement of the utility model, the inner side wall of the shell is provided with an annular boss used for abutting against the edge position of the upper end surface of the bottom cover, and the inner side wall of the shell is also provided with a plurality of limiting blocks used for abutting against the edge position of the lower end surface of the bottom cover. Through this design for bottom fixed mounting is uncovered in the bottom of casing and closed casing lower extreme face, because need seal the back sound chamber when piezoelectric type squealer phonation, consequently the design of bottom makes the air current not leak, has guaranteed piezoelectric type squealer's sound producing effect.

And the edge position of the lower end face of the flange is matched with a limit block of the shell, so that the installation is firmer.

And the edge of the end surface at the bottom of the bottom cover is an arc-shaped edge, so that the bottom cover can be conveniently clamped into the inner bottom surface of the shell, and the installation is convenient.

Preferably, the electronic control assembly is a PCB board. The piezoelectric sounder is controlled to sound through the circuit board.

Drawings

FIG. 1 is a schematic view of the overall structure of the piezoelectric sounder according to the present invention;

FIG. 2 is a schematic view of the overall structure of the piezoelectric sounder according to the present invention;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 3;

FIG. 5 is an exploded view of the piezoelectric sounder of the present invention;

FIG. 6 is an exploded view of the piezoelectric sounder of the present invention;

FIG. 7 is a schematic structural view of a bottom cover according to the present invention;

fig. 8 is a schematic structural view of the housing in the present invention.

In the attached drawings, 1, a shell; 1.1, an upper shell; 1.2, a lower shell; 1.3, convex shell; 1.3.1, threading holes; 1.3.2, notches; 1.4, a sound hole; 1.5, annular bulges; 1.6, an annular boss; 1.7, a limiting block; 2. a bottom cover; 2.1, grooves; 2.2, positioning pins; 2.3, a first avoidance bit; 2.4, a second avoidance bit; 2.5, flanges; 2.6, arc-shaped edges; 3. a piezoelectric sheet; 4. an electronic control assembly; 4.1, lead wires; 4.2, pins.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 6, the present invention shows a piezoelectric sounder comprising:

the sound-emitting device comprises a shell 1, wherein the lower end surface of the shell 1 is open, and the upper end surface of the shell 1 is provided with a sound-emitting hole 1.4;

the bottom cover 2 is arranged at the bottom of the shell 1 and seals the lower end face opening of the shell 1, and an accommodating space is formed between the bottom cover 2 and the shell 1;

the piezoelectric plate 3 is fixedly arranged in the accommodating space;

the electronic control assembly 4 is arranged on the bottom cover 2, the piezoelectric sheet 3 is electrically connected with the electronic control assembly 4 through a lead 4.1, the electronic control assembly 4 is electrically connected with a plurality of pins 4.2 corresponding to the piezoelectric sheet 3, one end, back to the bottom cover 2, of each pin 4.2 extends out of the shell 1, and the height of each pin 4.2 is not higher than that of the shell 1.

Based on the technical scheme, the piezoelectric sounder comprises a shell 1, a bottom cover 2, a piezoelectric plate 3 and an electric control assembly 4, wherein the bottom cover 2, the piezoelectric plate 3 and the electric control assembly 4 are all located inside the shell 1, namely the volume of the piezoelectric sounder is the volume of the shell 1, and the whole volume of the piezoelectric generator is greatly reduced. Moreover, the pins 4.2 electrically connected with the electronic control component 4 extend out of the shell 1 from one end back to the bottom cover 2 instead of extending out of the bottom cover 2, if the pins 4.2 extend out of the bottom cover 2, the length of the piezoelectric sounder can be greatly prolonged, namely the whole volume of the piezoelectric sounder is greatly increased, but the extending positions of the pins 4.2 are changed, so that the space where the pins 4.2 extend out can be shared with the installation occupied space of the shell 1 in the alarm, further, the height of the pins 4.2 is not higher than the top height of the shell 1, the whole volume of the piezoelectric sounder is greatly reduced, meanwhile, the size of the shell 1 of a product is not reduced, and the sound producing performance of the piezoelectric sounder can be ensured.

The concrete structure is as follows:

as shown in fig. 1, the casing 1 is stepped and divided into an upper casing 1.1 and a lower casing 1.2, the diameter of the upper casing 1.1 is smaller than that of the lower casing 1.2, and a convex shell 1.3 for protecting a pin 4.2 of the electronic control component 4 is arranged on the side wall of the lower casing 1.2, that is, the pin 4.2 extends out of the end face of the convex shell 1.3. As shown in fig. 8, further, the upper end surface of the convex shell 1.3 is provided with a plurality of threading holes 1.3.1 for extending the pins 4.2. Furthermore, a plurality of notches 1.3.2 for clamping the lead 4.1 are arranged in the convex shell 1.3 and close to the threading hole 1.3.1, so that the lead 4.1 is not easy to disorder. Specifically, on the one hand, the pins 4.2 may also slightly protrude from the side of the convex shell 1.3, and the opening positions are not limited to the upper end surface of the convex shell 1.3, but compared with the design of opening holes from the side, the design of arranging the opening positions on the upper end surface of the convex shell 1.3 has the minimum occupied space; on the other hand, a plurality of contacts connected with the head ends of the pins 4.2 in a welding way can be embedded in the convex shell 1.3 and electrically connected with external equipment through the contacts, and the method is not limited to the above. In addition, in the present embodiment, the number of the pins 4.2 is three, which are M, F, G three poles respectively. Through the design of casing 1 shape for pin 4.2 obtains the effective protection of convex shell 1.3, and pin 4.2 stretches out from the terminal surface of convex shell 1.3, and pin 4.2 protrusion is located casing 1.1 outside, can make the outside space of casing 1.1 give pin 4.2 make full use of, has saved the installation space of piezoelectric type squealer in the alarm inside.

The upper end surface of the bottom cover 2 is provided with a groove 2.1 for accommodating the electric control component 4, and as shown in fig. 7, a positioning pin 2.2 for positioning the electric control component 4 is arranged in the groove 2.1. The electric control component 4 is a PCB board, and a positioning hole matched with the positioning pin 2.2 is formed in the PCB board. In the specific installation, the positioning pin 2.2 is firstly inserted into the positioning hole of the PCB, and then the PCB is fixed by the fastener, or the PCB is fixed by welding, bonding or the like, which is not limited to this, as long as the electronic control assembly 4 is fixedly mounted on the bottom cover 2.

Furthermore, two sides of the groove 2.1 are provided with a first space 2.3 for taking and placing the electric control component 4, the first space 2.3 just facilitates the finger position, and the electric control component 4 is convenient to take and place in the groove 2.1. In addition, one end part of the groove 2.1 is provided with a second vacancy avoiding position 2.4 for accommodating the end part of the pin 4.2, so that a welding point at the bottom of the pin 4.2 on the PCB board has an accommodating space.

The inner side wall of the housing 1 is provided with an annular boss 1.6 for abutting against the edge position of the upper end face of the bottom cover 2, as shown in fig. 8, the inner side wall of the housing 1 is further provided with a plurality of limit blocks 1.7 for abutting against the edge position of the lower end face of the bottom cover 2, the bottom cover 2 is fixedly mounted at the bottom of the housing 1 and closes the opening of the lower end face of the housing 1, but the assembly structure of the bottom cover 2 and the housing 1 can also be realized by various modes such as a fastener, bonding and the like, and is not limited thereto. Meanwhile, because the back sound cavity needs to be closed when the piezoelectric sounder sounds, the design of the bottom cover 2 prevents air flow from leaking, and the sound production effect of the piezoelectric sounder is ensured.

Further, the inner end face of the bottom cover 2 is provided with a flange 2.5, as shown in fig. 6, the edge position of the upper end face of the flange 2.5 is matched with the annular boss 1.6 of the shell 1, and the edge position of the lower end face of the flange 2.5 is matched with the limit block 1.7 of the shell 1, so that the installation is firmer. Furthermore, the edge of the bottom end face of the bottom cover 2 is an arc-shaped edge 2.6, so that the bottom cover 2 can be conveniently clamped into the inner bottom face of the shell 1 through the arc-shaped edge 2.6, and the installation is convenient.

And the inner bottom surface of the shell 1 is provided with an annular bulge 1.5 for positioning and bonding the piezoelectric sheet 3, the piezoelectric sheet 3 is fixedly arranged on the annular bulge 1.5 of the inner bottom surface of the shell 1 and is opposite to the sound generating hole 1.4, and the piezoelectric sounder generates sound from the sound generating hole 1.4. During specific installation, the fixture is firstly positioned and placed through the fixture and then is bonded through glue. The fixing method of the piezoelectric sheet 3 is not limited to this, and may be fixing by a fastener or the like.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, rear, inner and outer … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.

Claims (10)

1. A piezoelectric sounder, comprising:

the sound-emitting device comprises a shell (1), wherein the lower end face of the shell (1) is open, and the upper end face of the shell (1) is provided with a sound-emitting hole (1.4);

the bottom cover (2) is arranged at the bottom of the shell (1) and seals the lower end face opening of the shell (1), and an accommodating space is formed between the bottom cover (2) and the shell (1);

the piezoelectric piece (3) is fixedly arranged in the accommodating space;

the electronic control assembly (4), the electronic control assembly (4) set up in on the bottom (2), just piezoelectric patches (3) through lead wire (4.1) with electronic control assembly (4) electricity is connected, electric connection has a plurality of pins (4.2) that correspond with piezoelectric patches (3) on electronic control assembly (4), the casing (1) outside is stretched out to the one end of pin (4.2) dorsad bottom (2), just the height that highly is not higher than casing (1) of pin (4.2).

2. The piezoelectric sounder according to claim 1, wherein the casing (1) is stepped, and is divided into an upper casing (1.1) and a lower casing (1.2), the diameter of the upper casing (1.1) is smaller than that of the lower casing (1.2), and the side wall of the lower casing (1.2) is provided with a convex shell (1.3) for protecting the pin (4.2) of the electronic control component (4).

3. The piezoelectric sounder according to claim 2, wherein a plurality of threading holes (1.3.1) for extending the pins (4.2) are formed in the upper end face of the convex shell (1.3), and a plurality of notches (1.3.2) for clamping the leads (4.1) are formed in the convex shell (1.3) at positions close to the threading holes (1.3.1).

4. The piezoelectric squealer as claimed in claim 1, wherein a groove (2.1) for accommodating the electronic control assembly (4) is formed in the upper end face of the bottom cover (2), and a positioning pin (2.2) for positioning the electronic control assembly (4) is arranged in the groove (2.1).

5. The piezoelectric sounder according to claim 4, wherein first space-avoiding positions (2.3) for taking and placing the electric control component (4) are arranged on two sides of the groove (2.1).

6. The piezoelectric squealer as claimed in claim 5 wherein one end of the groove (2.1) is provided with a second space avoidance (2.4) for accommodating the end of the pin (4.2).

7. The piezoelectric sounder according to claim 1, wherein the inner side wall of the casing (1) has an annular boss (1.6) for abutting against the edge position of the upper end face of the bottom cover (2), and the inner side wall of the casing (1) further has a plurality of stoppers (1.7) for abutting against the edge position of the lower end face of the bottom cover (2).

8. The piezoelectric sounder according to claim 7, wherein the inner end surface of the bottom cover (2) has a flange (2.5), the edge position of the upper end surface of the flange (2.5) is matched with the annular boss (1.6) of the shell (1), and the edge position of the lower end surface of the flange (2.5) is matched with the limit block (1.7) of the shell (1).

9. The piezoelectric sounder according to claim 1, wherein an edge of a bottom end face of the bottom cover (2) is an arc-shaped edge (2.6).

10. The piezoelectric sounder according to claim 1, wherein the electrical control assembly (4) is a PCB board.

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