Dual frequency sound production device

Abstract

The utility model discloses a double -frequency sound production device, including the casing and the first sound production mechanism of being located at the one end of casing and the second sound production mechanism of being located at the other end of casing, the first sound production mechanism includes along the first air hole and the first air outlet of casing length direction is equipped with, is equipped with the first chamber in the non -end of this first air hole, first air outlet is passed with first chamber and first air hole communication respectively, the second sound production mechanism includes along the second air hole and the second air outlet of casing length direction is equipped with, is equipped with the second chamber in the non -end of this second air hole, second air outlet is passed with second chamber and second air hole communication respectively, wherein the first air hole along the air outlet perpendicular square cross section is greater than the cross section of second air hole. Because being equipped with two sound production mechanisms, and the cross section of two air holes is different, produces two kinds of double -frequency sound, better adaptation different scene needs, satisfy the need of user, and two sound production mechanisms integration setting, effectively reduce the volume and be convenient for carrying.

Description

Technical Field

[0001] This utility model relates to the technical field of sound-generating devices, and in particular to a dual-frequency sound-generating device. Background Technology

[0002] Whistles are common everyday sound-producing devices. They utilize unstable airflow to create pressure instability, causing oscillations or vibrations to produce a whistling sound, and are widely used in various scenarios. With the increasing pace and pressure of modern life, pets, with their high loyalty and obedience, and the emotional value they provide, are gradually becoming a popular way for people to relieve stress after work. Most pets typically have sensitive hearing, and whistling is often used to better train their obedience and ability to follow instructions. However, existing whistles have fixed structures, producing only one frequency of sound with the same airflow. This cannot accommodate the different sound sensitivities of various pets, requiring different sound-producing devices to produce different frequencies, which is inconvenient in both use and carrying. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a dual-frequency sound generating device that can output two frequencies, better meeting user needs.

[0004] To address the aforementioned problems, this utility model provides a dual-frequency sound-generating device. The dual-frequency sound-generating device includes a housing, a first sound-generating mechanism located at one end of the housing, and a second sound-generating mechanism located at the other end of the housing. The first sound-generating mechanism includes a first air-blowing hole and a first air-out hole along the length of the housing. A first chamber is located at the end of the first air-blowing hole, and the first air-out hole communicates with both the first chamber and the first air-blowing hole. The second sound-generating mechanism includes a second air-blowing hole and a second air-out hole along the length of the housing. A second chamber is located at the end of the second air-blowing hole, and the second air-out hole communicates with both the second chamber and the second air-blowing hole. The cross-sectional area of ​​the first air-blowing hole perpendicular to the air outlet is larger than the cross-sectional area of ​​the second air-blowing hole, and / or the first chamber is larger than the second chamber.

[0005] In a preferred embodiment, the housing includes an upper cover and a lower cover. One end of the upper cover has a first protrusion and a first groove, and the upper surface of the first protrusion has a first air guiding slope. The other end of the upper cover has a second protrusion and a second groove, and the upper surface of the second protrusion has a second air guiding slope. One end of the lower cover has a first air blowing groove and a third groove, and the first air outlet is located between the first air blowing groove and the third groove. The other end of the lower cover has a second air blowing groove and a fourth groove, and the second air outlet is located between the second air blowing groove and the fourth groove. During assembly, the first protrusion and the first air blowing groove cooperate to form a first air blowing hole, the second protrusion and the second air blowing groove cooperate to form a second air blowing hole, and the first groove and the third groove, and the second groove and the fourth groove cooperate to form a first chamber and a second chamber, respectively.

[0006] In a preferred embodiment, the housing is provided with a first venting notch, the venting ends of the first vent and the first blowing hole are respectively located on two sides of the first venting notch, one side of the first venting notch forms a first venting slope, and the first vent on the first venting slope forms a first air-breaking blade on the side wall of the first chamber; the housing is provided with a second venting notch, the venting ends of the second vent and the second blowing hole are respectively located on two sides of the second venting notch, one side of the second venting notch forms a second venting slope, and the second vent on the second venting slope forms a second air-breaking blade on the side wall of the second chamber.

[0007] In a preferred embodiment, the bottom of the first air-blowing groove is at least partially coplanar with the side wall of the first chamber and / or the bottom of the second air-blowing groove is at least partially coplanar with the side wall of the second chamber.

[0008] In a preferred embodiment of this technical solution, the first air outlet and the second air outlet are U-shaped structures.

[0009] In a preferred embodiment, the first and second groove openings are provided with sealing strips, which respectively cooperate with the sealing grooves around the openings of the third and fourth grooves.

[0010] In a preferred embodiment, the first protrusion and the second protrusion are located in the first air-blowing groove and the second air-blowing groove, respectively, and the sides of the two protrusions are in contact with the sides of the two air-blowing grooves.

[0011] In a preferred embodiment, the first outlet slope and the first guide slope are not coplanar and / or the first outlet slope and the second guide slope are not coplanar, and the two outlet slopes form an angle of 150-175 with the first guide slope and the second guide slope, respectively.

[0012] In a preferred embodiment of this technical solution, the housing is provided with clearance notches at both ends, each clearance notch is provided with a groove, the housing at one end of the first sound-generating mechanism is provided with an inclined surface, the bottom of the inclined surface is provided with a stop block, and the clearance notch is provided in correspondence with the inclined surface.

[0013] As a preferred embodiment of the technical solution, the housing is provided with an annular groove and a through hole is provided in the annular groove.

[0014] This utility model relates to a dual-frequency sound-generating device, comprising a housing, a first sound-generating mechanism located at one end of the housing, and a second sound-generating mechanism located at the other end of the housing. The first sound-generating mechanism includes a first air inlet and a first air outlet along the length of the housing, with a first chamber at the end of the first air inlet. The first air outlet communicates with both the first chamber and the first air inlet. The second sound-generating mechanism includes a second air inlet and a second air outlet along the length of the housing, with a second chamber at the end of the second air inlet. The second air outlet communicates with both the second chamber and the second air inlet. The first air inlet has a larger cross-sectional area perpendicular to the air outlet than the second air inlet, and / or the first chamber is larger than the second chamber. Because it has two sound-generating mechanisms with different cross-sectional areas of the two air inlets and / or chambers, it produces two different dual-frequency sounds when blowing air, better adapting to different scenarios and meeting user needs. Furthermore, the integrated design of the two sound-generating mechanisms effectively reduces size and facilitates portability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the description only show some embodiments of this utility model, and therefore should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an embodiment of the dual-frequency sound-generating device of this utility model.

[0017] Figure 2 This is an exploded view of the structure of an embodiment of the dual-frequency sound-generating device of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of an embodiment of the dual-frequency sound-generating device of this utility model from another perspective.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The claims of this utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are also within the protection scope of this utility model.

[0021] It should be understood that, in the description of this utility model embodiments, all directional indicating terms, such as "up," "down," "left," "right," "front," and "back," indicate the orientation or positional relationship based on the orientation and positional relationship shown in the accompanying drawings or the orientation or positional relationship commonly used when the utility model product is in use. These terms are only for the purpose of simplifying the description of this utility model and do not explicitly or implicitly suggest that the device, element, or component referred to must have a specific orientation or specific orientational structure, and should not be construed as a limitation of this utility model. They are only used to explain the relative positional relationships and movement of the components shown in the accompanying drawings. When this specific posture changes, the directional indication may also change accordingly.

[0022] Furthermore, in this utility model, ordinal numbers such as "first" and "second" are used only for distinguishing purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features referred to as "first" and "second" may explicitly or implicitly indicate at least one of those technical features. In this utility model description, "multiple" means at least two, i.e., two or more, unless otherwise explicitly defined; "at least one" means one or more.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," and "screw-on" should be interpreted broadly. For example, they can refer to a relatively fixed positional relationship between components, or a physically fixed connection between components; they can be detachable connections or integral structures; they can be mechanical connections or electrical signal connections; they can be direct connections or indirect connections through intermediate media or components; they can refer to the internal connection of two elements or the interaction between two elements. Unless otherwise explicitly limited in the specification, other interpretations will not achieve the corresponding functions or effects. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0024] If the controllers or control circuits involved in this utility model are conventional control technologies or units for those skilled in the art, such as the controller's control circuit, they can be implemented by those skilled in the art using existing methods, such as simple programming. If the software or program involved in conjunction with the hardware to achieve the control result is not described in detail in the description, it belongs to the use of existing technology or conventional technology for those skilled in the art. The power supply also uses the aforementioned existing technology in the art. Furthermore, since the main utility model's technical point lies in the improvement of the mechanical device, this utility model will not describe the specific circuit control relationships and circuit connections in detail.

[0025] This disclosure provides many different embodiments or examples for implementing different structures of this utility model. To simplify the disclosure, specific examples of components and arrangements are described herein. Of course, these are merely examples and are not intended to limit the scope of this utility model. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, this utility model provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0026] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0027] like Figure 1-3 As shown, this utility model provides an embodiment of a dual-frequency sound-generating device.

[0028] The dual-frequency sound-generating device includes a housing 1, a first sound-generating mechanism 11 located at one end of the housing 1, and a second sound-generating mechanism 12 located at the other end of the housing. The first sound-generating mechanism 11 includes a first air outlet 1110 and a first air blowing hole 113 located along the length of the housing and communicating with the first air outlet 1110. A first chamber 119 is located at the end of the first air blowing hole 111. The first air outlet 1110 communicates with the first chamber 119 and the first air blowing hole 113. The second sound-generating mechanism 12 includes a second air blowing hole 123 and a second air outlet 1210 located along the length of the housing 1. A second chamber 129 is located at the end of the second air blowing hole 123. The second air outlet 1210 communicates with the second chamber 129 and the second air blowing hole 123. The cross-sectional area of ​​the first air blowing hole 113 in the direction perpendicular to the air outlet is larger than the cross-sectional area of ​​the second air blowing hole 123 and / or the first chamber 119 is larger than the second chamber 129.

[0029] Specifically, the space of the first chamber 119 is different from that of the second chamber 129. Taking the first chamber 119 being larger than the second chamber 129 as an example, due to the different chamber sizes, the airflow from the corresponding air outlet interferes differently with the airflow from the air outlet of the blowing hole, thus producing different frequencies of sound. Alternatively, the cross-sectional area of ​​the first blowing hole 113 along the vertical direction of the air outlet can be different from that of the second blowing hole 123. Taking the cross-sectional area of ​​the first blowing hole 113 along the vertical direction of the air outlet being larger than that of the second blowing hole 123 as an example, different cross-sectional areas produce different speeds when blowing air, thus producing different frequencies of sound. These two methods can be implemented individually or in combination to achieve the output of different frequencies of sound through blowing air.

[0030] The housing 1 includes an upper cover 10A and a lower cover 10B. One end of the upper cover 10A has a first protrusion 114 and a first groove 119A. The upper surface of the first protrusion 114 has a first air-guiding inclined surface 1141. The other end of the upper cover 10A has a second protrusion 124 and a second groove 129A. The upper surface of the second protrusion 124 has a second air-guiding inclined surface 1241. One end of the lower cover 10B has a first air-blowing groove 113A and a third groove 119B. A first air outlet 1110 is provided between 19B, that is, the first air outlet 1110 is located between the first air blowing groove 113A and the third groove 119A. The first air outlet 1110 communicates with both the first air blowing groove 113A and the third groove 119A. The other end of the lower cover 10B is provided with a second air blowing groove 123A and a fourth groove 129B. A second air outlet 1210 is provided between the second air blowing groove 123A and the fourth groove 129B, that is, the second air outlet 1210 is located between the second air blowing groove. Between 123B and the fourth groove 129B, the second air outlet 1210 communicates with both the second air-blowing groove 123B and the fourth groove 129B. During assembly, the upper cover 10A and the lower cover 10B are fixed. The first protrusion 114 is located in the first air-blowing groove 113A, forming the first air-blowing hole 113 within the first air-blowing groove 113A. That is, the side of the first protrusion 114 contacts the side of the first air-blowing groove 113A. The first air-guiding inclined surface 1141 forms with other parts of the first air-blowing groove 113A. The first air hole 113; the second protrusion 124 is located in the second air groove 123A to form the second air hole 123, that is, the side of the second protrusion 124 contacts the side of the second air groove 123B respectively, the second air guide slope 1241 and other parts of the second air groove 123B form the second air hole 123, the first groove 119A and the third groove 119B cooperate with the second groove 129A and the fourth groove 129B to form the relatively sealed first chamber 119 and the second chamber 129 respectively.The housing 1 is provided with a first vent 111 and a second vent 121. The first vent 111 and the second vent 121 are described with reference to the lower cover 10B. The vent ends of the first vent 1110 and the first air blowing hole 113 are respectively located on two sides of the first vent 111. The vent ends of the second vent 1210 and the second air blowing hole 123 are respectively located on two sides of the second vent 121. The first vent 111 communicates with the first chamber 119 and the first air blowing hole 113. The first vent 111... A chamber 119 forms a first air outlet 1110, and a first air outlet slope 1112 is formed on one surface of the first air outlet 1110. The first air outlet 1110 forms a first air-breaking blade (not shown in the attached figure) on the first air outlet slope 1112. The second air outlet 1210 is connected to the second air blowing hole 123 and the second chamber 129 respectively. A second air outlet slope is formed on one surface of the second air outlet 1210. The second air outlet forms a first air-breaking blade 1213 on the side wall of the first chamber 129 on the second air outlet slope 1212. The first vent 111 and the second vent 121 are connected on one side to the first chamber 119 and the second chamber 129 respectively to form the first vent 1110 and the second vent 1210. The other side of the first vent 111 and the second vent 121 are connected to the vents of the first air hole 113 and the second air hole 123 respectively. The airflow coming out of the first chamber 119 and the second chamber 129 can disturb the airflow coming out of the vents of the first air hole 1110 and the second vent 1210 in the vicinity of the first vent 1110 and the second vent 1210 in another direction. The first vent 1110 and the second vent 1210 are preferably designed as U-shaped structures.

[0031] In use, air is blown through the first air inlet 113. The airflow is compressed by the first air guide slope 1141 and increases as it passes quickly through the first air outlet 1110. Under the action of the first air-breaking blade, a portion of the air compressed by the first air inlet 113 is separated and reaches the outside of the shell along the first air outlet slope 1112. The other portion enters the first chamber 119 through the first air outlet 1110 and is discharged through the first air outlet 1110. When it is discharged, it disturbs the airflow compressed by the first air guide slope 1141 and makes a sound. Air is blown through the second air inlet 123. This airflow is compressed by the second air guide slope 1241. When it passes rapidly through the second air outlet 1210, under the action of the second air-breaking blade 1213, a portion of the compressed air from the second air inlet 123 is separated and flows along the second air outlet slope 1212 to the outside of the housing. The other portion enters the second chamber 129 through the second air outlet 1210 and then exits through the second air outlet 1210, disturbing the airflow compressed by the second air guide slope 1241 and producing a sound. Because the first chamber 119 and the second chamber 129 are different in size and / or the first air inlet 113 and the second air inlet 123 have different cross-sectional areas, they interfere with the airflow during exhaust, resulting in different sound frequencies. Integrating two different frequency sounds into one unit makes it easy to carry and can meet the needs of users in different scenarios, with a simple and compact structure.

[0032] The air-guiding slopes formed by the first protrusion 114 and the second protrusion 124, respectively, can change the airflow direction during blowing when they cooperate with the air-blowing holes formed by the two air-blowing grooves. Specifically, the first air-guiding slope 1141 on the first protrusion 114 can change the direction of blowing F1, and the second air-guiding slope 1241 on the second protrusion 124 can change the direction of blowing F2. This allows the first air-breaking blades on the first air outlet 1110 and the second air outlet 1210 to better divide the airflow into two parts, one entering the chamber and the other entering the shell, producing the designed sound. Simultaneously, during assembly, the first protrusion 114 and the second protrusion 124 enter the first air-blowing groove 113A and the second air-blowing groove 123A, with the sides of the two protrusions in close contact with the walls of the air-blowing grooves, which can increase the airtightness of the first air-blowing hole 113 and the second air-blowing hole 123.

[0033] To improve the airtightness of the first chamber 119 and the second chamber 129, sealing strips are provided around the first and second grooves, and sealing grooves are provided around the third and fourth grooves. The sealing strips and sealing grooves cooperate to form a seal between the two chambers, meaning that only the air outlets of the two chambers are connected to the housing. Specifically, a first sealing strip 118 is provided around the opening of the first groove 119A, and a first sealing groove 118B is provided around the opening of the third groove 119B. The first sealing strip 118 cooperates with the first sealing groove 118B to form a seal. A second sealing strip 128 is provided around the opening of the second groove 129A, and a second sealing groove 128B is provided around the opening of the fourth groove 129B. The second sealing strip 128 cooperates with the second sealing groove 128B to form a seal.

[0034] For better portability, the housing 1 is provided with an annular groove 13 and a through hole 14 in the annular groove 13. In use, it can be fixed by a rope in conjunction with the annular groove 13 or the through hole 14.

[0035] As a preferred technical solution in this embodiment, the gas outlet inclined surface is not coplanar with the first gas guide inclined surface or the second gas guide inclined surface, that is, the first gas outlet inclined surface 1112 and the first gas guide inclined surface 1141, and the second gas outlet inclined surface 1212 and the second gas guide inclined surface 1241 are not in the same plane. The first gas outlet inclined surface and the first gas guide inclined surface form an angle α of 150-175 degrees, or the second gas guide inclined surface and the second gas guide inclined surface form an angle α of 150-175 degrees.

[0036] Depending on the requirements, the bottom of the first air-blowing groove 113A may be partially coplanar with the side wall of the first chamber 119. Alternatively, the bottom of the second air-blowing groove 123A may also be partially coplanar with the side wall of the second chamber 129. This allows the first air-breaking blade 1113 and the second air-breaking blade 1213 formed by the first and second air outlets 1110 on the upper cover 10A to effectively separate the airflow from the first and second air outlets, thus generating better sound. Alternatively, the first air-blowing groove 113A or the second air-blowing groove 123A may be coplanar with the corresponding side wall portion, depending on the requirements.

[0037] As needed, one end of the first sound-generating mechanism is provided with an inclined surface 112, and the bottom of the inclined surface 112 is provided with a stop block 115, which can better fix the sound by simply using the mouth when blowing air, avoiding the need for manual fixation during use and improving ease of use.

[0038] In another embodiment, the housing 1 has clearance notches at both ends. Specifically, the lower cover 10B at one end of the first sound-generating mechanism has a first clearance notch 117, which corresponds to the inclined surface 112 on the upper cover, making that end flat and allowing for better mouth-holding during sound generation. Each clearance notch has a groove; the first clearance notch 117 has a first groove 1171, and the second clearance notch 127 has a second groove 1271. Typically, the upper and lower covers are injection molded, which reduces material usage and thus weight. The grooves also allow for better holding during blown air under higher pressure.

[0039] Because it has two sound-generating mechanisms and the two air holes have different cross-sectional areas, it produces two kinds of dual-frequency sounds, which can better adapt to different scenarios and meet the needs of users. At the same time, the two sound-generating mechanisms are integrated into one unit, which effectively reduces the size and makes it easy to carry.

[0040] As needed, the first protrusion 114 is provided with a dividing strip 1113 at one end near the first chamber 119, which divides the airflow into two turbulent airflows that blow air into the first blowing hole 123 when the first air outlet 1110 blows air out of the first chamber 1119.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions or combinations can be made to some structures (technical features) in one or more embodiments. Such modifications or substitutions or combinations do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, unless the possibility of substituting or combining structures (technical features) in different embodiments is explicitly excluded in the embodiments, or such substitutions or combinations are contrary to the overall concept of the utility model.

Claims

1. A dual-frequency sound-generating device, characterized in that: The device includes a housing, a first sound-generating mechanism located at one end of the housing, and a second sound-generating mechanism located at the other end of the housing. The first sound-generating mechanism includes a first air-blowing hole and a first air-out hole along the length of the housing, and a first chamber located at the end of the first air-blowing hole. The first air-out hole communicates with both the first chamber and the first air-blowing hole. The second sound-generating mechanism includes a second air-blowing hole and a second air-out hole along the length of the housing, and a second chamber located at the end of the second air-blowing hole. The second air-out hole communicates with both the second chamber and the second air-blowing hole. The cross-sectional area of ​​the first air-blowing hole perpendicular to the air outlet is larger than the cross-sectional area of ​​the second air-blowing hole, and / or the first chamber is larger than the second chamber.

2. The dual-frequency sound-generating device according to claim 1, characterized in that: The housing includes an upper cover and a lower cover. One end of the upper cover has a first protrusion and a first groove, and the upper surface of the first protrusion has a first air guiding slope. The other end of the upper cover has a second protrusion and a second groove, and the upper surface of the second protrusion has a second air guiding slope. One end of the lower cover has a first air blowing groove and a third groove, and the first air outlet is located between the first air blowing groove and the third groove. The other end of the lower cover has a second air blowing groove and a fourth groove, and the second air outlet is located between the second air blowing groove and the fourth groove. During assembly, the first protrusion and the first air blowing groove cooperate to form a first air blowing hole, and the second protrusion and the second air blowing groove cooperate to form a second air blowing hole. The first groove and the third groove, and the second groove and the fourth groove cooperate to form a first chamber and a second chamber, respectively.

3. The dual-frequency sound-generating device according to claim 2, characterized in that: The housing is provided with a first vent opening, the vent ends of the first vent hole and the first blowing hole are respectively located on two sides of the first vent opening, one side of the first vent opening forms a first vent slope, and the first vent hole forms a first air-breaking blade on the side wall of the first chamber on the first vent slope; the housing is provided with a second vent opening, the vent ends of the second vent hole and the second blowing hole are respectively located on two sides of the second vent opening, one side of the second vent opening forms a second vent slope, and the second vent hole forms a second air-breaking blade on the side wall of the second chamber on the second vent slope.

4. The dual-frequency sound-generating device according to claim 3, characterized in that: The bottom of the first air-blowing groove is at least partially coplanar with the side wall of the first chamber and / or the bottom of the second air-blowing groove is at least partially coplanar with the side wall of the second chamber.

5. The dual-frequency sound-generating device according to claim 3, characterized in that: The first and second air outlets are both U-shaped structures.

6. The dual-frequency sound-generating device according to claim 2, characterized in that: The first and second grooves are provided with sealing strips around their openings, which respectively cooperate with the sealing grooves around the openings of the third and fourth grooves.

7. The dual-frequency sound-generating device according to claim 2, characterized in that: The first protrusion and the second protrusion are located in the first air-blowing groove and the second air-blowing groove, respectively, and the sides of the two protrusions are in contact with the sides of the two air-blowing grooves.

8. The dual-frequency sound-generating device according to claim 3, characterized in that: The first outlet slope is not coplanar with the first guide slope and / or the first outlet slope is not coplanar with the second guide slope, and the two outlet slopes form an angle of 150-175 with the first guide slope and the second guide slope, respectively.

9. The dual-frequency sound-generating device according to claim 1, characterized in that: The housing has clearance notches at both ends, each clearance notch has a groove, and the housing at one end of the first sound-generating mechanism has an inclined surface with a stop block at the bottom of the inclined surface. The clearance notch is set in correspondence with the inclined surface.

10. The dual-frequency sound-generating device according to claim 1, characterized in that: The housing is provided with an annular groove and a through hole in the annular groove.

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