CN213303629U

CN213303629U - Buzzer and combined sounding mechanism

Info

Publication number: CN213303629U
Application number: CN202020927010.0U
Authority: CN
Inventors: 石璐绿; 张曙光; 朱兆焱; 李立锋
Original assignee: Audiowell Electronics Guangdong Co ltd
Current assignee: Audiowell Electronics Guangdong Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-05-28
Anticipated expiration: 2030-05-27

Abstract

The utility model relates to a buzzer and combined type sound production mechanism. The combined type sound production mechanism comprises: installation body, piezoelectric vibrator, loudspeaker spare and electricity link subassembly, the installation body is inside to have seted up the installation cavity, piezoelectric vibrator installs in the installation cavity, just piezoelectric vibrator will the installation cavity is separated for first pronunciation chamber and second pronunciation chamber, loudspeaker spare is located in the second pronunciation chamber, piezoelectric vibrator with loudspeaker spare all with electricity link subassembly electric connection, first sound outlet and second sound outlet have been seted up to the installation body, first sound outlet with first pronunciation chamber is linked together, the second sound outlet with second pronunciation chamber is linked together. The combined type sounding mechanism improves the use (sounding) effect under different frequency scenes.

Description

Buzzer and combined sounding mechanism

Technical Field

The utility model relates to an electronic component technical field especially relates to bee calling organ and combined type sound production mechanism.

Background

The buzzer is also called as an electronic buzzer and is widely applied to computers, printers, copiers and the like. At present, when a conventional piezoelectric buzzer is used, the piezoelectric buzzer has a characteristic of large sound pressure when the piezoelectric buzzer is in a specific frequency scene (the conventional piezoelectric buzzer can only generate high-frequency buzzing sound), but when the frequency is different, for example: when the piezoelectric buzzer needs to sound at a low frequency, the piezoelectric buzzer cannot be converted to sound, so that the traditional piezoelectric buzzer is poor in use effect.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a buzzer and a composite sounding mechanism for solving the problem of poor using effect of the conventional piezoelectric buzzer.

A composite sounding mechanism. The combined type sound production mechanism comprises: installation body, piezoelectric vibrator, loudspeaker spare, electricity link subassembly and lid, the installation body is inside to have seted up the installation cavity, piezoelectric vibrator installs in the installation cavity, just piezoelectric vibrator will the installation cavity is separated for first pronunciation chamber and second pronunciation chamber, loudspeaker spare is located in the second pronunciation chamber, piezoelectric vibrator with loudspeaker spare all with electricity link subassembly electric connection, first sound outlet and second sound outlet have been seted up to the wherein one end of installation body, the lid is installed on the other end of installation body, first sound outlet with first pronunciation chamber is linked together, the second sound outlet with second pronunciation chamber is linked together, just the opening direction of first sound outlet with the opening direction of second sound outlet is unanimous.

The buzzer comprises the combined type sounding mechanism and a power supply body, wherein the power supply body is electrically connected with the combined type sounding mechanism.

In one embodiment, the mounting body comprises a first mounting shell and a second mounting shell, the first mounting shell is mounted on the second mounting shell, the first mounting shell protrudes out of the surface of the second mounting shell, the first mounting shell is internally provided with the first sound-emitting cavity, the second mounting shell is provided with the second sound-emitting cavity, the piezoelectric vibrator is mounted at the joint of the first mounting shell and the second mounting shell, the first sound outlet is mounted on the first mounting shell, and the second sound outlet is mounted on the second mounting shell.

In one embodiment, a connecting portion is disposed on the surface of the second mounting housing, a mounting opening is disposed on the connecting portion, a first fixing thread is disposed on the connecting portion, a second fixing thread corresponding to the first fixing thread is disposed on the first mounting housing, the first mounting housing is fixedly mounted to the second mounting housing through the connecting portion, and the mounting opening is communicated with the first sounding cavity and the second sounding cavity.

In one embodiment, the first mounting housing includes a first mounting sleeve and a second mounting sleeve, the first mounting sleeve is movably sleeved outside the second mounting sleeve, the first mounting sleeve is provided with a first sound outlet, the second mounting sleeve is provided with the second fixing thread, and the first sound emitting cavity is formed inside the first mounting sleeve and inside the second mounting sleeve.

In one embodiment, the first sound outlet is formed in an end portion of the first mounting housing, the number of the second sound outlets is two or more, and the two or more second sound outlets are formed on the surface of the second mounting housing at intervals along the surface of the second mounting housing.

In one embodiment, the number of the first sound outlets is two or more, two or more first sound outlets are spaced apart from each other along the surface of the first mounting housing on the surface of the first mounting housing, two or more second sound outlets are spaced apart from each other along the surface of the second mounting housing on the surface of the second mounting housing.

In one embodiment, two or more first sound outlets are spaced apart from each other at a joint between the first mounting-housing side portion and the first mounting-housing end portion, and two or more second sound outlets are spaced apart from each other at a joint between the second mounting-housing side portion and the second mounting-housing end portion.

In one embodiment, the electrical connection component includes a circuit board, a first conductive wire set, a second conductive wire set and a contact pin, the speaker component is abutted against the inner wall of the second mounting housing, a mounting groove is formed in the second mounting housing, the circuit board is mounted in the second mounting housing, one end of the first conductive wire set is electrically connected to the piezoelectric vibrator, the other end of the first conductive wire set penetrates through the mounting groove and is electrically connected to the circuit board, one end of the second conductive wire set is electrically connected to the speaker component, the other end of the second conductive wire set is connected to the circuit board, the contact pin is mounted on the circuit board, the contact pin is electrically connected to the circuit board, and the contact pin is electrically connected to the power supply device.

In one embodiment, the composite sound-producing mechanism further includes a cover body, the cover body is covered at the bottom of the second mounting housing, and the cover body is provided with an adapting hole for the insertion pin to pass through.

When the combined type sounding mechanism is used, the shape and the size of the installation body are determined according to the preset installation model and the installation requirement. And then, determining the size of the piezoelectric vibrator according to the size of the cavity opening of the mounting cavity, namely ensuring that the piezoelectric vibrator can realize the separation of the mounting cavity after being placed in the mounting cavity. Simultaneously, confirm according to the accent size of installation cavity the size of loudspeaker spare guarantees promptly that loudspeaker spare can wholly install in the installation cavity. Realize the electrical control to loudspeaker spare and piezoelectric vibrator through electric connection assembly (including electric connection assembly external power supply realization electrical output), at this moment, when loudspeaker spare and piezoelectric vibrator simultaneous working, piezoelectric vibrator produced sound wave can be derived through first sound outlet in first sound-emitting cavity, and loudspeaker spare can be sounded in second sound-emitting cavity, and the sound wave can spread the installation body through second sound outlet simultaneously. Considering that the composite sound generating mechanism is often installed on a wall or a ceiling, the cover is additionally installed on the installation body, so that the sound pressure generated by the composite sound generating mechanism can be prevented from being transmitted to the wall or the ceiling. In addition, the opening direction of the first sound outlet is consistent with that of the second sound outlet, so that the one-side sound production of the composite sound production mechanism is ensured, and the influence on the sound production effect of the composite sound production mechanism due to the shielding of a wall or a ceiling is avoided. When the combined type sound production mechanism works in a scene with specific frequency, the sound production of the combined type sound production mechanism can be ensured to generate sound pressure with specific strength through the sound production of the piezoelectric vibrator, and when the combined type sound production mechanism works in a scene with frequency change, the sound production of the loudspeaker piece in the second sound production cavity can be utilized, so that the sound pressure compensation of the sound production of the piezoelectric vibrator is realized. Namely, the composite sounding mechanism improves the use (sounding) effect under different frequency scenes.

When the honey device is used, the power supply body (a battery or an external power supply) and the combined type generating mechanism are electrically connected, when the combined type generating mechanism works under the scene of specific frequency, the combined type generating mechanism can generate sound pressure with specific strength through the sound generation of the piezoelectric vibrator, when the combined type generating mechanism works under the scene of frequency change, the sound generation of the loudspeaker piece in the second sound generating cavity can be utilized at the moment, and therefore the sound pressure compensation of the sound generation of the piezoelectric vibrator is realized. Namely, the composite sounding mechanism improves the use (sounding) effect under different frequency scenes.

Drawings

FIG. 1 is an exploded view of the composite sound generating mechanism;

FIG. 2 is an internal cross-sectional view of the composite sound generating mechanism;

fig. 3 is an external overall structure diagram of the composite sound generating mechanism.

100. The mounting structure comprises a mounting body, 110, a mounting cavity, 111, a first sound-emitting cavity, 112, a second sound-emitting cavity, 120, a first sound outlet, 130, a second sound outlet, 140, a first mounting shell, 150, a second mounting shell, 200, a piezoelectric vibrator, 300, a loudspeaker piece, 400, an electric connection component, 410, a circuit board, 420, a first conductive wire group, 430, a second conductive wire group, 440, a contact pin, 450, a mounting groove, 500 and a cover body.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

As shown in fig. 1-3, in one embodiment, a compound sound generating mechanism includes: installation body 100, piezoelectric vibrator 200, loudspeaker piece 300, electricity link subassembly 400 and lid 500, installation body 100 has inside installation cavity 110 of having seted up, piezoelectric vibrator 200 installs in installation cavity 110, just piezoelectric vibrator 200 will installation cavity 110 is separated for first pronunciation chamber 111 and second pronunciation chamber 112, loudspeaker piece 300 is located in second pronunciation chamber 112, piezoelectric vibrator 200 with loudspeaker piece 300 all with electricity link subassembly 400 electric connection, first sound outlet 120 and second sound outlet 130 have been seted up to one of them one end of installation body 100, lid 500 is installed on the other end of installation body 100, first sound outlet 120 with first pronunciation chamber 111 is linked together, second sound outlet 130 with second pronunciation chamber 112 is linked together.

When the combined type sound generating mechanism is used, the shape and the size of the installation body 100 are determined according to the preset installation model and the installation requirement. Then, the size of the piezoelectric vibrator 200 is determined according to the size of the cavity opening of the mounting cavity 110, that is, after the piezoelectric vibrator 200 is placed in the mounting cavity 110, the piezoelectric vibrator 200 can realize the separation of the mounting cavity 110. Meanwhile, the size of the horn 300 is determined according to the size of the opening of the installation cavity 110, that is, the horn 300 can be integrally installed in the installation cavity 110. Realize the electrical control to loudspeaker piece 300 and piezoelectric vibrator 200 (including electrically connecting subassembly 400 external power supply and realizing electrical output) through electric connection subassembly 400, at this moment, when loudspeaker piece 300 and piezoelectric vibrator 200 worked simultaneously, piezoelectric vibrator 200 produced sound wave can be derived through first sound outlet 120 in first sound-emitting cavity 111, and loudspeaker piece 300 can be sounded in second sound-emitting cavity 112, and the sound wave can be spread out installation body 100 through second sound outlet 130 simultaneously. Considering that the composite sound generating mechanism is often installed on a wall or a ceiling, the cover 500 is additionally installed on the installation body 100, so that the sound pressure generated by the composite sound generating mechanism can be prevented from being transmitted to the wall or the ceiling. In addition, the opening direction of the first sound outlet 120 is consistent with the opening direction of the second sound outlet 130, so that the one-sided sound production of the composite sound production mechanism is ensured, and the influence on the sound production effect of the composite sound production mechanism due to the shielding of a wall or a ceiling is avoided. When the composite sounding mechanism works in a scene with a specific frequency, the composite sounding mechanism can be guaranteed to generate sound pressure with specific strength through sounding of the piezoelectric vibrator 200, and when the composite sounding mechanism works in a scene with a frequency change, the loudspeaker 300 can be used for sounding in the second sounding cavity 112, so that sound pressure compensation of sounding of the piezoelectric vibrator 200 is achieved. Namely, the composite sounding mechanism improves the use (sounding) effect under different frequency scenes.

In one embodiment, the horn 300 is an electromagnetic horn or an electromagnetic speaker.

As shown in fig. 2, in an embodiment, the mounting body 100 includes a first mounting case 140 and a second mounting case 150, the first mounting case 140 is mounted on the second mounting case 150, and the first mounting case 140 protrudes from the surface of the second mounting case 150, the first sound emitting cavity 111 is disposed in the first mounting case 140, the second sound emitting cavity 112 is disposed on the second mounting case 150, the piezoelectric vibrator 200 is mounted at the joint of the first mounting case 140 and the second mounting case 150, the first sound outlet 120 is mounted on the first mounting case 140, and the second sound outlet 130 is mounted on the second mounting case 150.

Specifically, the first mounting case 140 is integrally formed with the second mounting case 150. Or the first mounting housing 140 and the second mounting housing 150 are formed by splicing (when the first mounting housing 140 and the second mounting housing 150 are formed by splicing, the sealing property at the joint of the first mounting housing 140 and the second mounting housing 150 needs to be ensured, so as to avoid the sound leakage or crosstalk phenomenon). For example: after the first mounting housing 140 and the second mounting housing 150 are assembled, welding coating may be performed at the joint of the first mounting housing 140 and the second mounting housing 150. Further, the mutual separation of the first sound-emitting cavity 111 and the second sound-emitting cavity 112 is realized through the piezoelectric vibrator 200, so that the mutual interference between the sound wave emitted by the first sound-emitting cavity 111 (the sound wave emitted by the finger piezoelectric vibrator 200 in the first sound-emitting cavity 111) and the sound wave emitted by the second sound-emitting cavity 112 (the sound wave emitted by the finger horn 300 in the second sound-emitting cavity 112) can be effectively avoided, and the sound-emitting effect of the composite sound-emitting mechanism is ensured.

In one embodiment, a connecting portion is disposed on a surface of the second mounting housing 150, a mounting opening is disposed on the connecting portion, a first fixing thread is disposed on the connecting portion, a second fixing thread corresponding to the first fixing thread is disposed on the first mounting housing 140, the first mounting housing 140 is fixedly mounted on the second mounting housing 150 through the connecting portion, and the mounting opening is communicated with the first sound-emitting cavity 111 and the second sound-emitting cavity 112. In particular, the connection portion may be a connection collar or a connection lug. The first fixing thread and the second fixing thread are in threaded fit, so that the first mounting housing 140 and the second mounting housing 150 can be mounted and fixed. In addition, the first fixing screw is spirally wound on the connection portion in the height direction of the second mounting case 150, and the second fixing screw is spirally wound on the first mounting case 140 in the height direction of the first mounting case 140. At this time, after the first fixing thread and the second fixing thread are butted, by changing the number of turns of the first mounting case 140 relative to the connecting portion, the protruding height of the first mounting case 140 on the second mounting case 150 can be changed, so that the internal space of the first sound-emitting cavity 111 is changed, that is, the sound-emitting adjustment of the piezoelectric vibrator 200 is realized.

In one embodiment, the first mounting housing 140 includes a first mounting sleeve and a second mounting sleeve, the first mounting sleeve is movably sleeved on the outside of the second mounting sleeve, the first mounting sleeve is provided with a first sound outlet 120, the second mounting sleeve is provided with the second fixing thread, and the first sound emitting cavity 111 is formed inside the first mounting sleeve and inside the second mounting sleeve. Specifically, the first mounting housing 140 is sleeved with the second mounting sleeve and can move relative to the first mounting sleeve through the first mounting sleeve, so as to change the cavity opening space of the first sound generating cavity 111. The sound wave emitted from the piezoelectric vibrator 200 changes with the spatial change of the first sound emitting chamber 111. Therefore, the volume of the first sound-emitting cavity 111 can be adjusted to ensure that the composite sound-emitting mechanism achieves the best sound-emitting effect.

As shown in fig. 2 and 3, in one embodiment, the first sound outlet 120 is formed at an end of the first mounting housing 140, the number of the second sound outlets 130 is two or more, and the two or more second sound outlets 130 are formed along a surface of the second mounting housing 150 at intervals on the surface of the second mounting housing 150. Specifically, the first mounting housing 140 and the second mounting housing 150 are both cylindrical, and the bore of the first mounting housing 140 is smaller than the bore of the second mounting housing 150. The opening of the first sound outlet 120 directly at the end of the first mounting case 140 facilitates direct derivation of the sound wave, considering that the sound wave generated by the piezoelectric vibrator 200 in the first sound generation cavity 111 is concentrated. In addition, more than two second sound outlets 130 are arranged on the surface of the second mounting housing 150 at intervals along the surface of the second mounting housing 150, so that the sound waves generated in the second sound outlet cavity can be more uniformly transmitted out of the second mounting housing 150.

In one embodiment, the number of the first sound outlets 120 is two or more, the two or more first sound outlets 120 are spaced apart from each other along the surface of the first mounting case 140 on the surface of the first mounting case 140, the number of the second sound outlets 130 is two or more, and the two or more second sound outlets 130 are spaced apart from each other along the surface of the second mounting case 150 on the surface of the second mounting case 150. In particular, the sound waves led out from the first sound outlet cavity can be more uniform, and the sound waves led out from the second sound outlet cavity can be more uniform.

In one embodiment, two or more first sound outlets 120 are spaced apart from each other at a connection portion between a side portion of the first mounting housing 140 and an end portion of the first mounting housing 140, and two or more second sound outlets 130 are spaced apart from each other at a connection portion between a side portion of the second mounting housing 150 and an end portion of the second mounting housing 150. Specifically, the opening manner can make the sound wave diffusion transmission range led out through the first sound outlet 120 wider, and make the sound wave diffusion transmission range led out through the second sound outlet 130 wider.

As shown in fig. 1 and 2, in one embodiment, the electrical connection assembly includes a circuit board 410, a first set of conductive lines 420, a second set of conductive lines 430 and pins 440, the horn 300 is abutted against the inner wall of the second mounting case 150, an installation groove 450 is formed on the inside of the second mounting case 150, the circuit board 410 is mounted inside the second mounting case 150, one end of the first conductive wire set 420 is electrically connected to the piezoelectric vibrator 200, the other end of the first conductive wire set 420 passes through the mounting slot 450 to be electrically connected with the circuit board 410, one end of the second conductive wire set 430 is electrically connected to the speaker 300, the other end of the second conductive wire set 430 is connected to the circuit board 410, the contact pin 440 is mounted on the circuit board 410, the contact pin 440 is electrically connected to the circuit board 410, and the contact pin 440 is used for electrically connecting to a power supply device. Specifically, the horn 300 is abutted against the inner wall of the second mounting case 150, so that the sound wave emitted from the horn 300 can be effectively emitted toward the second sound outlet 130, and the sound wave is prevented from propagating in the opposite direction (i.e., the sound wave propagates in the direction away from the second sound outlet 130) through the gap between the horn 300 and the second mounting case 150. In addition, the second mounting housing 150 is provided with the mounting groove 450, so that the first conductive wire set 420 can be electrically connected to the circuit board 410 through the mounting groove 450, that is, the speaker 300 is prevented from being extruded and collided with the first conductive wire set 420 after being mounted. The first conducting wire set 420 and the second conducting wire set 430 are both close to the same side of the second installation housing 150, so that the installation space occupied by the first conducting wire set 420 and the second conducting wire set 430 inside the second installation housing 150 is effectively saved.

As shown in fig. 1 and fig. 2, in an embodiment, the composite sound generating mechanism further includes a cover body 500, the cover body 500 is disposed at the bottom of the second mounting housing 150, and an adapting hole for the insertion pin 440 to pass through is formed on the cover body 500. Specifically, the cover 500 is additionally installed at the bottom of the second installation casing 150, so that the overall stability of the installation body 100 is improved, and the influence of external factors on the internal structure of the composite sound generating mechanism can be effectively avoided.

In an embodiment, a buzzer includes the combined type sounding mechanism of any one of the above embodiments, and further includes a power supply body, where the power supply body is electrically connected to the combined type sounding mechanism.

When the honey device is used, the power supply body (a battery or an external power supply) and the combined type generating mechanism are electrically connected, when the combined type generating mechanism works under the scene of specific frequency, the combined type generating mechanism can generate sound pressure with specific strength through the sound generation of the piezoelectric vibrator 200, when the combined type generating mechanism works under the scene of frequency change, the sound generation of the horn piece 300 in the second sound generating cavity 112 can be utilized at the moment, and therefore the sound pressure compensation of the sound generation of the piezoelectric vibrator 200 is realized. Namely, the composite sounding mechanism improves the use (sounding) effect under different frequency scenes.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

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

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. The utility model provides a combined type sound generating mechanism which characterized in that, combined type sound generating mechanism includes: installation body, piezoelectric vibrator, loudspeaker spare, electricity link subassembly and lid, the installation body is inside to have seted up the installation cavity, piezoelectric vibrator installs in the installation cavity, just piezoelectric vibrator will the installation cavity is separated for first pronunciation chamber and second pronunciation chamber, loudspeaker spare is located in the second pronunciation chamber, piezoelectric vibrator with loudspeaker spare all with electricity link subassembly electric connection, first sound outlet and second sound outlet have been seted up to the wherein one end of installation body, the lid is installed on the other end of installation body, first sound outlet with first pronunciation chamber is linked together, the second sound outlet with second pronunciation chamber is linked together, just the opening direction of first sound outlet with the opening direction of second sound outlet is unanimous.

2. The composite sound generating mechanism according to claim 1, wherein the mounting body comprises a first mounting housing and a second mounting housing, the first mounting housing is mounted on the second mounting housing, and the first mounting housing protrudes out of the surface of the second mounting housing, the first mounting housing is provided with the first sound generating cavity, the second mounting housing is provided with the second sound generating cavity, the piezoelectric vibrator is mounted at the joint of the first mounting housing and the second mounting housing, the first sound outlet is mounted on the first mounting housing, and the second sound outlet is mounted on the second mounting housing.

3. The composite sound generating mechanism according to claim 2, wherein a connecting portion is disposed on the surface of the second mounting housing, a mounting opening is disposed on the connecting portion, a first fixing thread is disposed on the connecting portion, a second fixing thread corresponding to the first fixing thread is disposed on the first mounting housing, the first mounting housing is fixedly mounted on the second mounting housing through the connecting portion, and the mounting opening is communicated with the first sound generating cavity and the second sound generating cavity.

4. The composite sound generating mechanism as claimed in claim 3, wherein the first mounting housing includes a first mounting sleeve and a second mounting sleeve, the first mounting sleeve is movably sleeved on the second mounting sleeve, the first mounting sleeve has a first sound outlet, the second mounting sleeve has the second fixing thread, and the first sound generating cavity is formed inside the first mounting sleeve and inside the second mounting sleeve.

5. The composite sound generating mechanism according to claim 2, wherein the first sound outlet is provided at an end of the first mounting housing, the number of the second sound outlets is two or more, and the two or more second sound outlets are provided at intervals on a surface of the second mounting housing along a surface of the second mounting housing.

6. The composite sound emitting mechanism according to claim 2, wherein the number of the first sound outlets is two or more, the two or more first sound outlets are spaced apart from each other along the surface of the first mounting case on the surface of the first mounting case, the number of the second sound outlets is two or more, and the two or more second sound outlets are spaced apart from each other along the surface of the second mounting case on the surface of the second mounting case.

7. The composite sound generating mechanism according to claim 6, wherein two or more first sound outlets are spaced apart from each other at a joint between the first mounting case side portion and the first mounting case end portion, and two or more second sound outlets are spaced apart from each other at a joint between the second mounting case side portion and the second mounting case end portion.

8. The compound sounding mechanism of claim 2, wherein the electrical connection assembly comprises a circuit board, a first set of conductive wires, a second set of conductive wires, and a pin, the horn piece is abutted against the inner wall of the second mounting shell, the inner part of the second mounting shell is provided with a mounting groove, the circuit board is arranged in the second mounting shell, one end of the first conducting wire group is electrically connected with the piezoelectric vibrator, the other end of the first conducting wire group penetrates through the mounting groove to be electrically connected with the circuit board, one end of the second conducting wire group is electrically connected with the horn piece, the other end of the second conducting wire group is connected with the circuit board, the contact pin is arranged on the circuit board, and the contact pin is electrically connected with the circuit board, and the contact pin is used for being electrically connected with power supply equipment.

9. The combined type sound generating mechanism according to claim 8, wherein the cover is covered on the bottom of the second mounting housing, and an adaptive hole for the insertion pin to pass through is formed on the cover.

10. A buzzer, comprising the composite sounding mechanism of any one of claims 1 to 9, and further comprising a power supply body, wherein the power supply body is electrically connected to the composite sounding mechanism.