CN215577662U

CN215577662U - Piezoelectric buzzer structure

Info

Publication number: CN215577662U
Application number: CN202121992403.0U
Authority: CN
Inventors: 朱惠祥; 刘振隆
Original assignee: Guangzhou Kailitech Electronics Co ltd
Current assignee: Guangzhou Kailitech Electronics Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-01-18
Anticipated expiration: 2031-08-23

Abstract

The application relates to a piezoelectric buzzer structure, and belongs to the field of buzzers. Including the shell, buzzing piece and metal contact pin, be equipped with the sympathetic response cavity in the shell, buzzing piece is installed in the sympathetic response cavity, metal contact pin includes the inserted sheet, linking arm and stitch, the shell is provided with the journal stirrup, offer on the journal stirrup and supply inserted slot of inserted sheet, be provided with on the inserted sheet and be used for the auto-lock spare with the metal contact pin locking on the shell, the linking arm is including connecting the flexion on the inserted sheet and the welding part of being connected with the flexion, the arc surface salient of flexion sets up in the inserted sheet outside, the welding part contacts with buzzing piece and forms the solder joint through the welding fixed. This application can make metal contact pin firm and swiftly assemble in sympathetic response cavity, and the difficult skew of linking arm during wave-soldering need not to reuse glue after the welding fixed, can have firm connection structure, has improved bee calling organ's machining efficiency and product quality.

Description

Piezoelectric buzzer structure

Technical Field

The invention relates to the field of buzzers, in particular to a piezoelectric buzzer structure.

Background

The piezoelectric buzzer is an electroacoustic conversion device, a silver coating is coated on the surface of a piezoelectric material of the piezoelectric buzzer, the piezoelectric material is adhered to a metal sheet after polarization treatment to form a piezoelectric buzzer, and after an alternating current signal is applied to two poles of the piezoelectric material and the metal sheet, the piezoelectric buzzer can generate mechanical deformation and resonate with a properly designed resonance cavity to make a sound due to the inverse piezoelectric effect.

The piezoelectric buzzer structure of the same type in the current market comprises a shell, wherein a piezoelectric buzzer piece is bonded in a resonance cavity of the shell through silicon rubber, clamping grooves are formed in two sides of the shell, a metal contact pin is installed in the clamping grooves in a clamping mode, a connecting arm is arranged on the metal contact pin, and the connecting arm is welded on two poles of the piezoelectric buzzer piece to be conducted.

The piezoelectric buzzer of this kind of structure need weld with wave-soldering when the user assembles, because the high temperature of wave-soldering makes the interior metal contact pin of shell draw-in groove not hard up production micrometric displacement, pulls the linking arm solder joint after the metal contact pin displacement and leads to the solder joint to peel off, for solving this problem, common practice is fixed at metal contact pin draw-in groove and piezoelectric buzzer piece solder joint department use glue, but this method need consume very big human cost, and is unfavorable to the production efficiency and the cost control of product.

SUMMERY OF THE UTILITY MODEL

In order to improve the packaging efficiency of bee calling organ, this application provides a piezoelectric bee calling organ structure.

The application provides a pair of piezoelectric buzzer structure adopts following technical scheme:

the utility model provides a piezoelectricity buzzer structure, includes shell, buzzing piece and metal contact pin, be equipped with the sympathetic response cavity in the shell, the buzzing piece is installed in the sympathetic response cavity, metal contact pin includes inserted sheet, linking arm and stitch, the shell is provided with the journal stirrup, offer on the journal stirrup and supply inserted sheet male slot, be provided with on the inserted sheet and be used for locking the self-locking piece on the journal stirrup with metal contact pin, the linking arm is including connecting the flexion on the inserted sheet and the welding part of being connected with the flexion, the arc surface salient of flexion sets up in the inserted sheet outside, the welding part is fixed through welding formation solder joint with the contact of buzzing piece.

Through adopting above-mentioned technical scheme, make the inserted sheet of metal contact pin insert the slot after, the flexion arc surface salient position of linking arm is extruded by the inner wall of slot, makes the linking arm produce towards the effort that the buzzer pressed down to make linking arm butt on the buzzer surface tightly, the difficult skew of linking arm in the wave-soldering process, it is fixed to need not to reuse glue after the welding, can have firm connection structure, has improved machining efficiency and product quality.

Preferably, the welding part is provided with a bending part, and the bending part bends the welding part away from the stitch direction.

By adopting the technical scheme, the stress received by the connecting arm after bending can be better dispersed at the bending part, the wave-soldering process of the connecting arm or the tilting condition after welding is further reduced, and the connection stability of the metal contact pin and the buzzer is improved.

Preferably, the inner wall of the shell is provided with a placing step, the buzzer is placed on the placing step, and the contact edge of the buzzer and the resonance cavity is provided with silicon rubber for bonding and fixing.

By adopting the technical scheme, the buzzing piece can be positioned and placed at the position needing to be fixed more conveniently, and then is bonded and fixed by using the silicon rubber, so that the installation efficiency of the buzzing piece is improved.

Preferably, the self-locking piece includes the buckle shell fragment, the slot bottom is kept away from one side inner wall of sympathetic response cavity link up with the outside and set up and form the joint passageway, buckle shell fragment joint in joint passageway department, the bottom butt of buckle shell fragment is in the slot bottom of slot.

Through adopting above-mentioned technical scheme, make the inserted sheet insert the slot after, buckle shell fragment joint in the joint passageway department of journal stirrup to make metal contact pin can install in the journal stirrup firmly.

Preferably, the self-locking piece comprises a positioning convex point, the inner wall of one side of the resonance cavity is provided with a positioning groove, and the positioning convex point is clamped in the positioning groove.

Through adopting above-mentioned technical scheme, when making the inserted sheet insert the slot, the location bump receives the extrusion of slot and deformation, and until the inserted sheet inserts the slot completely after, the location bump is corresponding with positioning groove, thereby the deformation of location bump restores the joint in positioning groove, makes metal contact pin can install in the journal stirrup firmly.

Preferably, one side of the notch of the slot, which is close to the resonance cavity, is communicated with the resonance cavity to form a limiting channel, and the connecting arm is arranged in the limiting channel.

Through adopting above-mentioned technical scheme, make the linking arm can install in the journal stirrup after the metal contact pin, the both sides of linking arm receive spacing effect of spacing passageway to further reduce the condition that the linking arm removed at the wave-soldering process, improved welding process's stability.

Preferably, the two sides of the end part of the pin are provided with dovetail clamping sheets, and the width of each dovetail clamping sheet increases progressively in a direction departing from the insertion sheet.

Through adopting above-mentioned technical scheme, bee calling organ is when the installation is used, and forked tail joint piece can make metal contact pin stably assign on equipment, has improved bee calling organ's practicality.

Preferably, the end of the stitch is provided with a wave fixing piece which is arranged in a wave-shaped bending manner.

Through adopting above-mentioned technical scheme, make bee calling organ after placeeing on equipment, the wave stationary blade can increase the frictional force of stitch and equipment place department of inserting to it is more firm after making bee calling organ installation.

Preferably, the inner wall of the shell is provided with a sound emitting hole, and the sound emitting hole is located between the bottom wall of the resonance cavity and the installation position of the buzzer.

Through adopting above-mentioned technical scheme, when making silicon rubber bond buzzing piece on the step of placing of shell, the workman can encircle the round injection with silicon rubber, need not to avoid the injection in the sound hole position, has reduced the processing degree of difficulty, has improved the bonding steadiness of machining efficiency and buzzing piece.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the self-locking piece is arranged on the insertion piece of the metal insertion pin, and the bending part protruding outwards is arranged on the connecting arm, so that the effect of fastening and connecting the metal insertion pin and the shell is realized through a simple structure, the insertion piece and the connecting arm and the buzzer piece are fixed without glue at the slot, the manual labor efficiency is greatly improved compared with the existing structure, the manual intervention is reduced, the product quality is guaranteed, and the good economic value is achieved;

2. the dovetail clamping sheet and the wave fixing sheet are arranged at the pin of the metal contact pin, so that the buzzer can be more stably inserted into equipment for use, and the practicability is better;

3. through setting up the position department between buzzing piece and the cavity diapire of song, make the workman can encircle the buzzing piece round with silicon rubber and inject the bonding, reduced the bonding degree of difficulty of buzzing piece, make the production of bee calling organ more high-efficient.

Drawings

FIG. 1 is a schematic view of the overall structure in embodiment 1 of the present application;

FIG. 2 is a schematic view of a split structure in example 1 of the present application;

FIG. 3 is a side view of a metal pin according to example 1 of the present application;

FIG. 4 is a front view of a metal pin in accordance with example 1 of the present application;

FIG. 5 is a schematic view of the whole structure from another perspective in embodiment 1 of the present application;

FIG. 6 is a schematic top view of the structure in embodiment 1 of the present application;

FIG. 7 is a schematic view of the overall structure in embodiment 2 of the present application;

fig. 8 is a schematic view of the overall structure of another viewing angle in embodiment 2 of the present application.

Description of reference numerals: 1. a buzzer; 2. a housing; 21. a resonance cavity; 22. a sound emitting hole; 23. placing a step; 24. silicone rubber; 25. supporting a lug; 26. a slot; 261. clamping the channel; 262. a limiting channel; 3. a buzzer; 31. a metal sheet; 32. piezoelectric ceramic plates; 4. a metal pin; 41. a plug-in sheet; 411. buckling the elastic sheet; 412. positioning the salient points; 42. a connecting arm; 421. a bending section; 422. welding the part; 423. bending the part; 43. a stitch; 431. a dovetail snap tab; 432. the wave fixing sheet; 5. and (7) welding points.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses piezoelectric buzzer structure.

Example 1:

a piezoelectric buzzer structure is shown in figures 1 and 2 and comprises a shell 2, a buzzer 3 and a metal contact pin 4.

Referring to fig. 2, the buzzer 3 includes a metal plate 31 and a piezoelectric ceramic plate 32 adhered to the center of the metal plate 31. The shell 2 is cavity setting and one end opening, forms the sympathetic response cavity 21 with 3 size adaptations of buzzer piece, and the sound emitting hole 22 has been seted up to the inner wall of sympathetic response cavity 21, and the sound emitting hole 22 runs through to the opening edge of sympathetic response cavity 21. The inner wall of the resonance cavity 21 is provided with a placing step 23 for placing the buzzer 3 in the resonance cavity 21. The surface of the buzzer 3, which is adhered with the piezoelectric ceramic piece 32, faces outwards and is placed on the placing step 23, and the contact edge of the metal piece 31 and the resonance cavity 21 is injected with the silicon rubber 24 for bonding, so that the buzzer 3 is installed and fixed in the shell 2.

Referring to fig. 2, the metal pin 4 includes a plug sheet 41, a connection arm 42 and a pin 43, and the plug sheet 41, the connection arm 42 and the pin 43 are integrally formed by stamping.

Wherein, referring to fig. 3 and 4, the pin 43 is connected to the plug sheet 41 and is located the same extending direction with the plug sheet 41, the two sides of the end portion of the pin 43 far away from the plug sheet 41 are provided with the dovetail clamping sheets 431, the width of the dovetail clamping sheets 431 increases progressively in the direction of deviating from the plug sheet 41, so that the end portion of the pin 43 is in a dovetail shape, thereby being beneficial to the buzzer 1 to be clamped on the equipment more firmly for use, in addition, the end portion of the pin 43 is further provided with the wave fixing sheet 432, the wave fixing sheet 432 is in a wave-shaped bending arrangement, the wave-shaped outline can increase the friction force of the pin 43 and the buzzer 1 at the equipment installation position, and the installation stability of the buzzer 1 can be further improved.

Referring to fig. 3 and 4, the connecting arm 42 is connected to the insertion piece 41 by bending inward, specifically, the connecting arm 42 includes a bending portion 421 and a welding portion 422, the bending portion 421 connects the welding portion 422 with the insertion piece 41, and an arc surface of the bending portion 421 protrudes outside the insertion piece 41, in addition, a bending portion 423 is provided on the welding portion 422, the bending portion 423 bends the welding portion 422 away from the pin 43 downward, and an included angle of the bending portion 423 of the welding portion 422 is about 150 °. In addition, the inserting sheet 41 is provided with a fastening spring 411 and a positioning protruding point 412, and the fastening spring 411 and the positioning protruding point 412 are both located on the same outer side surface of the inserting sheet 41.

Referring to fig. 2, the outer side both ends symmetry of shell 2 is provided with journal stirrup 25, has seted up on the journal stirrup 25 and has supplied inserted sheet 41 male slot 26, and one side that sympathetic response cavity 21 was kept away from to slot 26's tank bottom link up with the outside and set up and form joint passageway 261, and one side that slot 26's notch is close to sympathetic response cavity 21 forms spacing passageway 262 with sympathetic response cavity 21 intercommunication, and the inner wall that slot 26 kept away from sympathetic response cavity 21 one side is provided with positioning groove.

As shown in fig. 5, after the insertion piece 41 of the metal pin 4 is inserted into the slot 26, the protruding portion of the arc surface of the bending portion 421 of the connecting arm 42 is abutted against the inner wall of the slot 26, the bending portion 421 is deformed by the abutting acting force, so that the connecting arm 42 is rotated and pressed down towards the buzzer 3 until the buckle spring 411 is clamped in the clamping channel 261, the positioning bump 412 at this time is clamped and locked with the positioning groove correspondingly, the connecting arm 42 is arranged in the limiting channel 262, the connecting arm 42 of the metal pin 4 is abutted against the buzzer 3, and thus the metal pin 4 is stably installed and fixed in the housing 2.

Referring to fig. 6, after the metal pins 4 are mounted and fixed on the support lugs 25 on both sides of the housing 2, the connecting arm 42 of one metal pin 4 contacts with the metal sheet 31 of the buzzer 3, and the connecting arm 42 of the other metal pin 4 contacts with the piezoelectric ceramic sheet 32 of the buzzer 3, and solder is welded at the position where the welding part 422 of the two connecting arms 42 contacts with the buzzer 3 to form a welding spot 5, so that the metal pins 4 and the buzzer 3 are welded and fixed.

The implementation principle of the embodiment of the application is as follows:

the buzzer 3 is placed on the placing step 23 of the resonance cavity 21 of the shell 2, so that the buzzer 3 is bonded at the position of the placing step 23 through the silicon rubber 24, then the inserting piece 41 of the metal inserting needle 4 is inserted into the inserting groove 26 of the supporting lug 25, the bending part 421 of the connecting arm 42 generates a pressing force due to the extrusion limiting effect of the inner wall of the inserting groove 26, meanwhile, the buckling elastic piece 411 on the inserting piece 41 is buckled on the buckling channel 261 of the supporting lug 25, the positioning salient point 412 on the inserting piece 41 is buckled in the positioning groove of the inserting groove 26, so that the metal pin 43 is stably installed on the shell 2, the connecting arm 42 of the metal pin 43 is tightly propped against the buzzer 3, the situation that the connecting arm 42 is warped or displaced due to the high temperature of wave soldering during welding is avoided, the welding spot 5 can be better cooled and fixed, the strength of the welding spot 5 is greatly improved, and the welding spot 5 is free from secondary fixing by using glue, the processing cost is reduced and the processing efficiency is high.

Example 2:

the present embodiment is different from embodiment 1 in the sound emission hole 22, as shown in fig. 7 and 8, in the present embodiment, the sound emission hole 22 is opened between the bottom wall of the resonance cavity 21 and the installation position of the buzzer 3, so that after the buzzer 3 is placed on the placement step 23, when a worker uses the silicone rubber 24 for bonding, the worker does not need to avoid the position of the sound emission hole 22 for bonding, the silicone rubber 24 can be continuously extruded, and the processing efficiency and the bonding strength are improved.

The above are all preferred embodiments of the present application, and the present embodiment is only explained for the present application, and the protection scope of the present application is not limited by this, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A piezoelectric buzzer structure comprises a shell (2), a buzzer piece (3) and a metal contact pin (4), and is characterized in that a resonance cavity (21) is arranged in the shell (2), the buzzer piece (3) is installed in the resonance cavity (21), the metal contact pin (4) comprises an insertion sheet (41), a connecting arm (42) and a pin (43), the shell (2) is provided with a support lug (25), the support lug (25) is provided with a slot (26) for the insertion sheet (41) to be inserted into, the insertion sheet (41) is provided with a self-locking piece for locking the metal contact pin (4) on the support lug (25), the connecting arm (42) comprises a bending part (421) connected to the insertion sheet (41) and a welding part (422) connected with the bending part (421), and the arc surface of the bending part (421) protrudes out of the insertion sheet (41), the welding part (422) is in contact with the buzzer sheet (3) and is fixed by welding to form a welding point (5).

2. The piezoelectric buzzer structure according to claim 1, wherein a bend (423) is provided on the welding portion (422), and the bend (423) bends the welding portion (422) away from the pins (43).

3. The piezoelectric buzzer structure according to claim 1, wherein a placing step (23) is arranged on the inner wall of the shell (2), the buzzer (3) is placed on the placing step (23), and silicone rubber (24) is arranged at the contact edge of the buzzer (3) and the resonance cavity (21) and is bonded and fixed.

4. The piezoelectric buzzer structure according to claim 1, wherein the self-locking element comprises a snap spring (411), an inner wall of one side of the bottom of the slot (26), which is far away from the resonance cavity (21), is communicated with the outside to form a clamping channel (261), the snap spring (411) is clamped at the clamping channel (261), and the bottom end of the snap spring (411) abuts against the bottom of the slot (26).

5. The piezoelectric buzzer structure according to claim 1, wherein the self-locking piece comprises a positioning protrusion (412), a positioning groove is formed in the inner wall of the slot (26) on the side far away from the resonance cavity (21), and the positioning protrusion (412) is clamped in the positioning groove.

6. A piezoelectric buzzer structure according to claim 1, wherein the side of the slot (26) near the resonance cavity (21) communicates with the resonance cavity (21) to form a limiting passage (262), and the connecting arm (42) is disposed in the limiting passage (262).

7. A piezoelectric buzzer structure in accordance with claim 1, wherein the end of the pin (43) is flanked by dovetail tabs (431), the width of the dovetail tabs (431) increasing in a direction away from the plug-in tab (41).

8. A piezoelectric buzzer structure in accordance with claim 1, wherein the ends of the pins (43) are provided with wave fixing pieces (432), and the wave fixing pieces (432) are arranged in a wave-like curved manner.

9. A piezoelectric buzzer structure according to claim 3, wherein a sounding hole (22) is formed in an inner wall of the casing (2), and the sounding hole (22) is located between a bottom wall of the resonance cavity (21) and a mounting position of the buzzer piece (3).