Acoustic-electric transducer

Abstract

The utility model discloses an acoustoelectric transducer which comprises a bearing part, a transducer module and a shell, the shell comprises a bottom shell, a top cover and a containing cavity, the bottom shell and the top cover are installed mutually, the containing cavity is formed between the bottom shell and the top cover, the top cover is provided with a top cover penetrating hole, and the top cover penetrating hole is communicated with the containing cavity. The shell is provided with a containing cavity, the shell is provided with a top cover penetrating hole, the top cover penetrating hole is communicated with the containing cavity, the transducer module is contained in the containing cavity of the shell, the periphery of the front face of the transducer module is attached to the top cover, and the top cover penetrating hole of the top cover corresponds to the middle of the front face of the module. A gap is formed between the module back face of the transducer module and the bottom shell, the two opposite sides of the bearing part are connected to the bottom shell and the module back face of the transducer module respectively, and a cavity is formed between the bearing part and the bottom shell. The acoustoelectric transducer provided by the utility model has a better sound receiving effect.

Description

Technical Field

[0001] The utility model relates to a transducer, in particular to an acoustic-electric transducer. Background Art

[0002] An acoustic-to-electric transducer with a piezoelectric ceramic disc utilizes the piezoelectric effect of piezoelectric ceramic materials to achieve acoustic-to-electric conversion. When sound waves act on the piezoelectric ceramic disc, the piezoelectric ceramic material changes due to the pressure changes of the sound waves, generating an electric charge. This charge change is related to the intensity and frequency of the sound waves acting on the piezoelectric ceramic disc. For acoustic-to-electric transducers, structurally eliminating clutter interference during the acoustic-to-electric conversion process is crucial for improving the transducer's sound reception. The inventors of this utility model aim to develop a new structure for acoustic-to-electric transducers to reduce clutter interference. Utility Model Content

[0003] One purpose of the present utility model is to provide an acoustic-electric transducer, wherein a gap is provided between the back side of the transducer module and the bottom shell of the acoustic-electric transducer, and the periphery of the front side of the module is fitted to the top cover, so that there is a smaller contact area between the transducer module and the shell, which is conducive to faster transmission of sound waves and thus improves the sound reception effect of the acoustic-electric transducer.

[0004] One purpose of the present utility model is to provide an acoustic-electric transducer, wherein a cavity is formed between the flexible supporting portion of the acoustic-electric transducer and the bottom shell, and the cavity can make the sound effect clearer, thereby improving the sound reception effect of the acoustic-electric transducer.

[0005] One purpose of the present utility model is to provide an acoustic-electric transducer, wherein the supporting portion is integrally formed by glue, so that not only the structural design of the acoustic-electric transducer is simple, reliable and easy to assemble, but also the supporting portion can form a gap between the back side of the transducer module and the bottom shell, so that only the front side of the transducer module contacts the top cover.

[0006] According to one aspect of the present invention, the present invention provides an acoustic-electric transducer, comprising:

[0007] Flexible support portion;

[0008] A transducer module, wherein the transducer module has a module back side and a module front side facing each other; and

[0009] A shell, wherein the shell includes a bottom shell and a top cover and has a receiving cavity, the bottom shell and the top cover are installed with each other, the receiving cavity is formed between the bottom shell and the top cover, the top cover has a top cover through-hole, and the top cover through-hole is connected to the receiving cavity, wherein the transducer module is received in the receiving cavity of the shell, the periphery of the module front of the transducer module is attached to the top cover, the top cover through-hole of the top cover corresponds to the middle of the module front, and there is a gap between the module back of the transducer module and the bottom shell, wherein the opposite sides of the supporting part are respectively connected to the bottom shell and the module back of the transducer module, and there is a cavity between the supporting part and the bottom shell.

[0010] According to one embodiment of the present invention, the bottom shell has a bottom shell groove, which corresponds to the middle part of the back side of the transducer module, and the bottom shell groove of the bottom shell is used to form the cavity.

[0011] According to an embodiment of the present invention, the supporting portion is integrally combined with the bottom shell and the back surface of the transducer module during the molding process.

[0012] According to an embodiment of the present invention, the supporting portion is formed by glue poured into the bottom shell groove of the bottom shell.

[0013] According to one embodiment of the present invention, the bottom shell has a glue injection hole, which is connected to the bottom shell groove. Glue is allowed to be injected into the bottom shell groove through the glue injection hole of the bottom shell, and the glue forms the supporting portion after curing.

[0014] According to one embodiment of the present invention, the top cover includes a cover ring and a hook arm extending downward from the cover ring, the cover ring is stacked on the bottom shell, and the hook arm hooks a side of the bottom shell facing away from the cover ring.

[0015] According to one embodiment of the present invention, the bottom shell has a notch, and the hook arm is located in the notch of the bottom shell.

[0016] According to one embodiment of the present invention, the bottom shell has an assembly hole and a screw hole, the assembly hole extends inward from the peripheral wall of the bottom shell to the accommodating cavity of the shell, and the screw hole extends from the assembly hole to the side of the bottom shell, wherein the acoustic and electric transducer further includes a wiring assembly, the wiring assembly includes a terminal and a wire-pressing screw, the terminal has a wire-through hole and a threaded hole connected to the wire-through hole, the terminal is assembled in the assembly hole of the bottom shell, the threaded hole of the terminal corresponds to the screw hole of the bottom shell, the wire of the transducer module is connected to the terminal, and the inner end of the wire-pressing screw is screwed into the threaded hole of the terminal after passing through the screw hole of the bottom shell, so as to allow the inner end of the wire-pressing screw to extend to the wire-through hole of the terminal.

[0017] According to one embodiment of the present invention, the transducer module includes a piezoelectric ceramic sheet and two cover plates, and the two cover plates are respectively arranged on opposite sides of the piezoelectric ceramic sheet, one of the cover plates is used to form the back side of the transducer module, and the other cover plate is used to form the front side of the transducer module.

[0018] According to another aspect of the present invention, the present invention provides an acoustic-electric transducer, comprising:

[0019] A transducer module, wherein the transducer module has opposing module back and module front faces; and

[0020] A shell, wherein the shell includes a bottom shell and a top cover and has a receiving cavity, the top cover includes a cover ring and a hook arm extending downward from the cover ring, the cover ring is superimposed on the bottom shell, the hook arm hooks the side of the bottom shell away from the cover ring, the receiving cavity is formed between the bottom shell and the top cover, the top cover has a top cover through-hole, and the top cover through-hole is connected to the receiving cavity, wherein the transducer module is received in the receiving cavity of the shell, the periphery of the module front face of the transducer module is attached to the top cover, and the top cover through-hole of the top cover corresponds to the middle part of the module front face.

[0021] According to one embodiment of the present invention, the bottom shell has a notch, and the hook arm is located in the notch of the bottom shell.

[0022] According to one embodiment of the present invention, there is a gap between the back surface of the transducer module and the bottom shell.

[0023] According to an embodiment of the present invention, the acoustic-electric transducer includes a supporting portion, and the supporting portion is integrally combined with the bottom shell and the back surface of the transducer module during the molding process.

[0024] According to an embodiment of the present invention, a cavity is provided between the supporting portion and the bottom shell.

[0025] According to one embodiment of the present invention, the bottom shell has an assembly hole and a screw hole, the assembly hole extends inward from the peripheral wall of the bottom shell to the accommodating cavity of the shell, and the screw hole extends from the assembly hole to the side of the bottom shell, wherein the acoustic and electric transducer further includes a wiring assembly, the wiring assembly includes a terminal and a wire-pressing screw, the terminal has a wire-through hole and a threaded hole connected to the wire-through hole, the terminal is assembled in the assembly hole of the bottom shell, the threaded hole of the terminal corresponds to the screw hole of the bottom shell, the wire of the transducer module is connected to the terminal, and the inner end of the wire-pressing screw is screwed into the threaded hole of the terminal after passing through the screw hole of the bottom shell, so as to allow the inner end of the wire-pressing screw to extend to the wire-through hole of the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram from one viewing angle of an acoustic-electric transducer according to a preferred embodiment of the present utility model.

[0027] Figure 2 It is a three-dimensional schematic diagram of the acoustoelectric transducer according to the above preferred embodiment of the present invention from another perspective.

[0028] Figure 3 It is a schematic exploded view of the acousto-electric transducer according to the preferred embodiment of the present invention from one perspective.

[0029] Figure 4 1 is a schematic exploded view of the acoustoelectric transducer according to the preferred embodiment of the present invention from another perspective.

[0030] Figure 5 It is a cross-sectional schematic diagram of one position of the acousto-electric transducer according to the above preferred embodiment of the present utility model.

[0031] Figure 6 It is a cross-sectional schematic diagram of another position of the acoustoelectric transducer according to the above preferred embodiment of the present invention. DETAILED DESCRIPTION

[0032] Before describing in detail any embodiment of the present invention, it should be understood that the present invention is not limited in its application to the construction and arrangement details of the components set forth in the following description or illustrated in the following figures. The present invention is capable of other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used herein are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and variations thereof herein is intended to cover the items and their equivalents set forth below, as well as additional items. Unless otherwise specified or limited, the terms "mount", "connect", "support" and "couple" and variations thereof are used broadly and cover direct mounting and indirect mounting, connection, support and coupling. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings.

[0033] Furthermore, on the first hand, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second hand, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0034] Attachment Figures 1 to 6 An acoustic-electric transducer according to a preferred embodiment of the present invention will be disclosed and explained in the following description, wherein the acoustic-electric transducer includes a shell 10 and a transducer module 20 arranged in the shell 10, and the transducer module 20 is used for performing acoustic-electric conversion, converting sound waves into electrical signals.

[0035] Specifically, the housing 10 includes a bottom housing 11 and a top cover 12, and the housing 10 has a receiving cavity 13. The bottom housing 11 and the top cover 12 are mounted on each other to form the receiving cavity 13 between the bottom housing 11 and the top cover 12, wherein the top cover 12 has a top cover through-hole 121, and the top cover through-hole 121 of the top cover 12 is connected to the receiving cavity 13 of the housing 10. The transducer module 20 has a module back 201 and a module front 202 opposite to each other. The transducer module 20 is received in the receiving cavity 13 of the housing 10, and the module back 201 of the transducer module 20 faces the bottom housing 11, and the periphery of the module front 202 is affixed to the top cover 12, so that the top cover through-hole 121 of the top cover 12 corresponds to the module front 202 of the transducer module 20. The sound waves are allowed to reach the transducer module 20 through the top cover through-hole 121 of the top cover 12 , and the transducer module 20 performs sound-to-electricity conversion to generate an electrical signal.

[0036] In the attached Figures 1 to 6 In this specific example of the acoustic-electric transducer of the present invention, the transducer module 20 includes a piezoelectric ceramic sheet 21 and two cover plates 22. One cover plate 22 is disposed on the bottom side of the piezoelectric ceramic sheet 21 to form the module back side 201 of the transducer module 20, and the other cover plate 22 is disposed on the top side of the piezoelectric ceramic sheet 21 to form the module front side 202 of the transducer module 20. In this way, the backs of the two cover plates 22 can be exposed to the outside of the piezoelectric ceramic sheet 21 to protect the piezoelectric ceramic sheet 21. When sound waves reach the transducer module 20 through the top cover through-hole 121 of the top cover 12, the piezoelectric ceramic sheet 21 of the transducer module 20 changes due to the pressure change caused by the sound waves acting on the transducer module 20, thereby generating an electrical signal.

[0037] The top cover 12 includes a cover ring 122 and a plurality of hook arms 123 extending downward from the cover ring 122. The top cover through hole 121 of the top cover 12 is formed in the cover ring 122. When assembling the acoustic-electric transducer, after the cover ring 122 of the top cover 12 is suspended above the bottom shell 11, the top cover 12 is pressed toward the bottom shell 11, so that the top cover 12 can be superimposed on the bottom shell 11. At the same time, the hook arms 123 hook the side of the bottom shell 11 away from the cover ring 122, thereby realizing the mutual installation of the bottom shell 11 and the top cover 12. That is to say, the installation of the bottom shell 11 and the top cover 12 does not require the aid of screws and tools. It is only necessary to overlap the cover ring 122 of the top cover 12 on the bottom shell 11 and hook the multiple hook arms 123 of the top cover 12 on the side of the bottom shell 11 facing away from the top cover 12. This makes the structural design of the acoustic-electric transducer of the present invention simple, reliable and easy to assemble.

[0038] It is worth mentioning that the number of the hook arms 123 of the top cover 12 is not limited in the acoustic-electric transducer of the present invention. Figures 1 to 6 In this specific example of the acoustic-electric transducer shown, the number of the hook arms 123 of the top cover 12 is three, and the three hook arms 123 are arranged in an array along the periphery of the cover ring 122. In this way, the three hook arms 123 of the top cover 12 cooperate with each other to enable the bottom shell 11 and the top cover 12 to be reliably assembled.

[0039] Preferably, the bottom shell 11 has a plurality of notches 111 for accommodating the hook arms 123 of the top cover 12 , so that the hook arms 123 of the top cover 12 do not protrude from the side wall of the bottom shell 11 .

[0040] Reference Attachment Figure 5 and Figure 6There is a gap 30 between the module back 201 of the transducer module 20 and the bottom shell 11, that is, there is no direct contact between the module back 201 of the transducer module 20 and the bottom shell 11. In this way, there is a smaller contact area between the transducer module 20 and the shell 10, which is conducive to faster transmission of sound waves and improves the sound reception effect of the acoustic-electric transducer. On this basis, the acoustic-electric transducer of the present invention further includes a flexible supporting portion 40, the opposite sides of the supporting portion 40 are respectively connected to the bottom shell 11 and the module back 201 of the transducer module 20, and there is a cavity 50 between the supporting portion 40 and the bottom shell 11. In this way, on the one hand, the supporting portion 40 can make the gap 30 between the transducer module 20 and the bottom shell 11, and on the other hand, the cavity 50 can enhance the sound reception effect of the acoustic-electric transducer, making the sound reception clearer.

[0041] In other words, in an example of the acoustic-electric transducer of the present invention, the periphery of the module front 202 of the transducer module 20 is fitted to the cover ring 122 of the top cover 12, and there is the gap 30 between the module back 201 of the transducer module 20 and the bottom shell 11, the opposite sides of the supporting portion 40 are respectively connected to the bottom shell 11 and the module back 201 of the transducer module 20, and there is the cavity 50 between the supporting portion 40 and the bottom shell 11. In this way, the acoustic-electric transducer can have a better sound reception effect.

[0042] Furthermore, the bottom shell 11 has a bottom shell groove 112, and the bottom shell groove 112 corresponds to the middle part of the module back side 201 of the transducer module 20. Thus, after the acoustic-electric transducer is assembled, the bottom shell groove 112 of the bottom shell 11 is used to form the cavity 50.

[0043] In the attached Figures 1 to 6 In this specific example of the acoustic-electric transducer of the present invention shown, the supporting portion 40 is integrally combined with the bottom shell 11 and the module back 201 of the transducer module 20 during the molding process, so that the opposite sides of the supporting portion 40 are respectively connected to the bottom shell 11 and the module back 201 of the transducer module 20, preventing the supporting portion 40 from moving relative to the bottom shell 11 and preventing the supporting portion 40 from moving relative to the transducer module 20. At the same time, the acoustic-electric transducer does not require any connector or medium to connect the bottom side of the supporting portion 40 and the bottom shell 11, and does not require any connector or medium to connect the top side of the supporting portion 40 and the module back 201 of the transducer module 20.

[0044] That is to say, in the attached Figures 1 to 6 In the specific example of the acoustic-electric transducer of the present invention shown, the supporting portion 40 is not a prefabricated part, but is formed during the process of assembling the acoustic-electric transducer. In this way, it is beneficial to reduce the assembly steps of the acoustic-electric transducer and reduce the cost of the acoustic-electric transducer, while avoiding the generation of a gap between the supporting portion 40 and the back side 201 of the transducer module 20, so as to ensure the sound reception effect of the acoustic-electric transducer.

[0045] For example, the supporting portion 40 can be formed by curing the glue (for example, polyurethane) poured into the bottom shell groove 112 of the bottom shell 11. In this way, the acoustic-electric transducer does not require any connectors or media to connect the bottom side of the supporting portion 40 and the bottom shell 11, and does not require any connectors or media to connect the top side of the supporting portion 40 and the module back side 201 of the transducer module 20. At the same time, the supporting portion 40 hardly absorbs vibration, which enables the cavity 50 formed between the supporting portion 40 and the bottom shell 11 to enhance the sound reception effect of the acoustic-electric transducer, making the sound reception clearer.

[0046] It should be noted that when pouring glue into the bottom shell groove 112 of the bottom shell 11, in order to avoid generating a gap between the supporting part 40 and the module back 201 of the transducer module 20 and to ensure that the cavity 50 is formed between the supporting part 40 and the bottom shell 11, on the one hand, it is necessary to place the semi-finished product of the acoustic and electric transducer with the top cover 12 located below, and on the other hand, it is necessary to control the amount of glue to avoid the glue filling the bottom shell groove 112 of the bottom shell 11. In this way, after the glue solidifies to form the supporting part 40, the opposite sides of the supporting part 40 can be respectively connected to the bottom shell 11 and the module back 201 of the transducer module 20, and the cavity 50 is formed between the bottom shell 11 and the supporting part 40.

[0047] To facilitate the pouring of glue into the bottom shell groove 112 of the bottom shell 11, the bottom shell 11 is provided with at least one glue pouring hole 113, which is connected to the bottom shell groove 112. Glue is allowed to be poured into the bottom shell groove 112 through the glue pouring hole 113 of the bottom shell 11. Preferably, the bottom shell 11 has at least one vent hole 114, which is connected to the bottom shell groove 112. When glue is poured into the bottom shell groove 112 of the bottom shell 11 through the glue pouring hole 113, air in the receiving chamber 13 of the housing 10 is allowed to be discharged through the vent hole 114 of the bottom shell 11.

[0048] Continue to refer to the attached Figures 1 to 6The bottom shell 11 has at least one assembly hole 115 and at least one screw hole 116. The assembly hole 115 extends inward from the peripheral wall of the bottom shell 11 to the accommodating cavity 13 of the shell 10, and the screw hole 116 extends from the assembly hole 115 to the side of the bottom shell 11, that is, the assembly hole 115 and the screw hole 116 are connected to each other.

[0049] The acoustic-electric transducer further includes at least one wiring assembly 60, the wiring assembly 60 including a terminal 61 and a wire-pressing screw 62, the terminal 61 having a threading hole 611 and a threaded hole 612 connected to the threading hole 611, wherein the terminal 61 is assembled in the assembly hole 115 of the bottom shell 11, for example, based on the friction generated between the terminal 61 and the inner wall of the bottom shell 11 for forming the assembly hole 115, the terminal 61 can be fixedly assembled in the assembly hole of the bottom shell 11 115, the threaded hole 612 of the terminal 61 corresponds to the screw hole 116 of the bottom shell 11, and the wire 23 of the transducer module 20 is connected to the terminal 61. For example, the wire 23 of the transducer module 20 can be welded to the terminal 61, wherein the inner end of the wire pressing screw 62 is screwed into the threaded hole 612 of the terminal 61 after passing through the screw hole 116 of the bottom shell 11, so as to allow the inner end of the wire pressing screw 62 to extend to the wire threading hole 611 of the terminal 61. After the end of the external wire 100 (for example, the wire of the device) is inserted into the wire hole 611 of the terminal 61, the inner end of the wire pressing screw 62 can press the end of the external wire 100 inserted into the wire hole 611 of the terminal 61 toward the terminal 61 by rotating the wire pressing screw 62. In this way, the terminal 61 can connect the transducer module 20 and the device.

[0050] Specifically, in the attached Figures 1 to 6 In this specific example of the acoustic-electric transducer of the present invention shown, the bottom shell 11 has two assembly holes 115 and two screw holes 116, the two assembly holes 115 are independent of each other, and the two assembly holes 115 and the two screw holes 116 correspond to and are connected one by one. Accordingly, the acoustic-electric transducer includes two wiring assemblies 60, and the terminal posts 61 of each wiring assembly 60 are respectively assembled in each assembly hole 115 of the bottom shell 11. In this way, the positive pole wire 23 of the transducer module 20 can be welded to one terminal 61, and the negative pole wire 23 can be welded to the other terminal 61, so that the positive and negative poles of the transducer module 20 can be isolated from each other to avoid the risk of short circuit.

[0051] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are provided for illustrative purposes only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. An acoustic-electric transducer, characterized in that: include: Flexible support portion; A transducer module, wherein the transducer module has a module back side and a module front side facing each other; as well as A shell, wherein the shell includes a bottom shell and a top cover and has a receiving cavity, the bottom shell and the top cover are installed with each other, the receiving cavity is formed between the bottom shell and the top cover, the top cover has a top cover through-hole, and the top cover through-hole is connected to the receiving cavity, wherein the transducer module is received in the receiving cavity of the shell, the periphery of the module front of the transducer module is attached to the top cover, the top cover through-hole of the top cover corresponds to the middle of the module front, and there is a gap between the module back of the transducer module and the bottom shell, wherein the opposite sides of the supporting part are respectively connected to the bottom shell and the module back of the transducer module, and there is a cavity between the supporting part and the bottom shell.

2. The acoustic-electric transducer according to claim 1, wherein the bottom shell has a bottom shell groove, the bottom shell groove corresponds to the middle part of the back side of the transducer module, and the bottom shell groove of the bottom shell is used to form the cavity. 3 . The acoustic-electric transducer according to claim 1 , wherein the supporting portion is integrally combined with the bottom shell and the module back surface of the transducer module during a molding process. 4 . The acoustic-electric transducer according to claim 2 , wherein the supporting portion is integrally combined with the bottom shell and the module back surface of the transducer module during a molding process. 5 . The acoustic-electric transducer according to claim 4 , wherein the supporting portion is formed by glue poured into the bottom case groove of the bottom case.

6. The acoustic-electric transducer according to claim 4, wherein the bottom shell has a glue injection hole, the glue injection hole is connected to the bottom shell groove, glue is allowed to be injected into the bottom shell groove through the glue injection hole of the bottom shell, and the glue forms the supporting portion after curing.

7. The acoustic-electric transducer according to any one of claims 1 to 6, wherein the top cover comprises a cover ring and a hook arm extending downward from the cover ring, the cover ring is stacked on the bottom shell, and the hook arm hooks a side of the bottom shell facing away from the cover ring. 8 . The acoustic-electric transducer according to claim 7 , wherein the bottom shell has a notch, and the hook arm is located in the notch of the bottom shell.

9. The acoustic-electric transducer according to any one of claims 1 to 6, wherein the bottom shell has an assembly hole and a screw hole, the assembly hole extends inward from the peripheral wall of the bottom shell to the accommodating cavity of the shell, and the screw hole extends from the assembly hole to the side of the bottom shell, wherein the acoustic-electric transducer further includes a wiring assembly, the wiring assembly includes a terminal and a wire-pressing screw, the terminal has a wire-through hole and a threaded hole connected to the wire-through hole, the terminal is assembled in the assembly hole of the bottom shell, the threaded hole of the terminal corresponds to the screw hole of the bottom shell, the wire of the transducer module is connected to the terminal, and the inner end of the wire-pressing screw is screwed into the threaded hole of the terminal after passing through the screw hole of the bottom shell, so as to allow the inner end of the wire-pressing screw to extend to the wire-through hole of the terminal.

10. The acoustic-electric transducer according to any one of claims 1 to 6, wherein the transducer module comprises a piezoelectric ceramic sheet and two cover plates, the two cover plates being respectively arranged on opposite sides of the piezoelectric ceramic sheet, one of the cover plates being used to form the back side of the transducer module, and the other cover plate being used to form the front side of the transducer module.

11. An acoustic-electric transducer, characterized in that: include: A transducer module, wherein the transducer module has a module back side and a module front side facing each other; and A shell, wherein the shell includes a bottom shell and a top cover and has a receiving cavity, the top cover includes a cover ring and a hook arm extending downward from the cover ring, the cover ring is superimposed on the bottom shell, the hook arm hooks the side of the bottom shell away from the cover ring, the receiving cavity is formed between the bottom shell and the top cover, the top cover has a top cover through-hole, and the top cover through-hole is connected to the receiving cavity, wherein the transducer module is received in the receiving cavity of the shell, the periphery of the module front face of the transducer module is attached to the top cover, and the top cover through-hole of the top cover corresponds to the middle part of the module front face.

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