Buzzer and electronic equipment

Abstract

The invention provides a buzzer and electronic equipment. The buzzer provided by the invention is applied to electronic equipment with sound alarm requirements, the buzzer comprises a shell, a vibrating diaphragm and an elastic film, and the vibrating diaphragm and the elastic film are accommodated in a cavity of the shell. The shell comprises a cover plate and a bottom plate, the cover plate comprises a sound hole, and the cover plate and the bottom plate are oppositely arranged. The vibrating diaphragm is located between the cover plate and the bottom plate, the vibrating diaphragm is connected with the elastic film, the elastic film is connected with the inner side wall of the shell, and the elastic film blocks a gap between the peripheral edge of the vibrating diaphragm and the inner side wall of the shell. In the buzzer, the elastic film can be used for blocking liquid or water vapor entering the buzzer from the outside through the sound hole, so that the risk that devices in the buzzer are in contact with the liquid or the water vapor to be corroded can be reduced while the sound production effect of the buzzer is ensured, and the service life of the buzzer is prolonged; therefore, the user experience of the electronic equipment applying the buzzer can be improved.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to a buzzer and an electronic device. Background Art

[0002] Buzzers, also known as sounders, are widely used in electronic devices such as mobile phones, personal computers (PCs), wearable devices, electronic toys, or car devices.

[0003] As a sound-generating device, the main function of a buzzer is to produce sound. The buzzer includes a sound hole, through which air flows in and out of the buzzer to transmit the sound produced by the buzzer. Since the sound hole directly connects the internal space of the buzzer with the outside world, in order to prevent external liquid or water vapor from entering the interior of the buzzer through the sound hole, a waterproof design is usually performed at the sound hole to reduce the risk of corrosion and damage to the internal components of the buzzer. However, the existing waterproof solutions for buzzers usually come at the cost of reducing the sound effect, which affects the user experience. Based on this, how to achieve effective waterproofing of the buzzer without affecting the sound effect of the buzzer has become a difficult problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0004] The present application provides a buzzer and an electronic device, which can improve the waterproof performance of the buzzer while ensuring the sound effect of the buzzer, thereby extending the service life of the buzzer.

[0005] In a first aspect, the present application provides a buzzer comprising a housing, a vibrating diaphragm, and an elastic film, the vibrating diaphragm and the elastic film being housed within a cavity of the housing. The housing comprises a cover plate and a base plate, the cover plate including a sound hole for connecting the interior of the housing to the outside world so that sound generated by the buzzer can be transmitted through the sound hole. The cover plate and the base plate are disposed opposite each other within the housing. Furthermore, the vibrating diaphragm is positioned between the cover plate and the base plate, the vibrating diaphragm being connected to the elastic film, which in turn is connected to the inner sidewall of the housing. The elastic film seals the gap between the peripheral edge of the vibrating diaphragm and the inner sidewall of the housing, thereby achieving the effect of the elastic film sealing the gap between the peripheral edge of the vibrating diaphragm and the inner sidewall of the housing. In the buzzer provided by the present application, the elastic film can be used to block liquid or water vapor from entering the buzzer through the sound hole. This can ensure the sound quality of the buzzer while reducing the risk of corrosion of components within the buzzer from contact with liquid or water vapor, thereby extending the service life of the buzzer.

[0006] In the present application, the elastic film can be disposed in various ways. For example, the elastic film covers the vibrating diaphragm along the direction from the cover plate to the base plate. This helps to improve the reliability of the elastic film in sealing the gap between the vibrating diaphragm and the inner side wall of the housing, thereby ensuring the waterproof effect of the buzzer.

[0007] Alternatively, the elastic film may be provided in an annular structure, with the elastic film covering a portion of the vibrating diaphragm along the direction from the cover plate to the base plate. This allows the elastic film to seal the gap between the vibrating diaphragm and the inner sidewall of the housing while effectively reducing the effect of the elastic film on the vibration of the vibrating diaphragm, thereby improving the sound quality of the buzzer.

[0008] In one possible implementation of the present application, a portion of the elastic film extends to the side of the vibrating diaphragm facing away from the cover plate. Furthermore, if the vibrating diaphragm includes a first surface facing the cover plate and a second surface facing the base plate, the elastic film can be connected to both the first and second surfaces of the vibrating diaphragm. This effectively improves the reliability of the connection between the elastic film and the vibrating diaphragm.

[0009] It is worth mentioning that the specific relative positions of the elastic film and the vibration diaphragm are not limited in the present application. The elastic film and the vibration diaphragm can be stacked, or the elastic film can wrap part or all of the vibration diaphragm, or the elastic film and the vibration diaphragm can be arranged coplanar, etc. As long as the elastic film can at least seal the gap between the peripheral edge of the vibration diaphragm and the inner wall of the shell, the effective waterproofing of the buzzer can be ensured.

[0010] In the present application, the elastic film and the vibrating diaphragm may be connected in a variety of ways. For example, the elastic film and the vibrating diaphragm may be bonded together to provide a more flexible connection. Alternatively, the elastic film and the vibrating diaphragm may be formed into an integral structure through a process such as injection molding to enhance the reliability of the connection between the elastic film and the vibrating diaphragm and to minimize the effect of the elastic film on the vibration of the vibrating diaphragm, thereby ensuring the sound effect of the buzzer.

[0011] Furthermore, the elastic film and the housing can be connected in a variety of ways. For example, in one possible implementation, the housing further includes a peripheral side plate positioned between the cover plate and the bottom plate. The cover plate and the bottom plate are each connected to one end surface of the peripheral side plate, and the cover plate, bottom plate, and peripheral side plate form a cavity of the housing. Furthermore, a portion of the elastic film is fixed between the cover plate and the peripheral side plate.

[0012] In the present application, the elastic film can be partially secured between the cover plate and the surrounding side panels in a variety of ways. For example, the elastic film can be connected to the surrounding side panels by bonding. Specifically, the elastic film can be bonded to the end surface of the surrounding side panel facing the cover plate, or bonded to the inner sidewall of the surrounding side panel to increase the flexibility of the connection between the elastic film and the surrounding side panel. Furthermore, the elastic film and the surrounding side panel can be formed into an integral structure through a process such as injection molding, which provides a more reliable connection between the elastic film and the surrounding side panel.

[0013] In addition, the elastic film may be connected to the cover plate, wherein the elastic film may be bonded to the cover plate to provide a more flexible connection between the elastic film and the cover plate. Alternatively, the elastic film and the cover plate may be an integrally formed structure obtained by a process such as injection molding to enhance the reliability of the connection between the elastic film and the cover plate.

[0014] In a possible implementation of the present application, the buzzer further includes a magnet, which is accommodated in the cavity of the shell, and the magnet is attracted to the bottom plate and the vibration diaphragm, thereby achieving connection between the vibration diaphragm and the bottom plate.

[0015] This application does not limit the type of buzzer. For example, the buzzer can be an electromagnetic buzzer. To achieve vibration of the vibrating diaphragm, the base plate includes a central column extending toward the cover plate. The vibrating diaphragm is located between the central column and the cover plate, with the central column and the vibrating diaphragm spaced apart. Furthermore, the buzzer also includes a coil housed in a cavity within the housing and sleeved around the central column. It is worth noting that in this buzzer, the central column can be made of a magnetizable metal or metal alloy, such as iron or an iron alloy. Thus, when current is passed through the coil, the central column becomes magnetized by the electric field created by the coil, allowing the central column to attract the vibrating diaphragm, causing the portion of the vibrating diaphragm opposite the central column to move toward the central column. When the current is stopped, the central column loses its magnetism, releasing the vibrating diaphragm, allowing the portion of the vibrating diaphragm opposite the central column to move toward the cover plate. Based on this, a periodic current can be passed through the coil to make the coil generate a periodically changing magnetic field, so that the center column periodically absorbs or releases the vibrating diaphragm, so as to achieve the purpose of making the vibrating diaphragm form periodic vibration between the cover plate and the center column, thereby generating sound.

[0016] In a second aspect, the present application further provides an electronic device, comprising a control circuit and the buzzer of the first aspect, wherein the control circuit is electrically connected to the buzzer. For example, when the buzzer is an electromagnetic buzzer, the control circuit can be electrically connected to the coil to control the periodicity of the current flowing through the coil, thereby controlling the vibration pattern of the vibrating diaphragm so that the buzzer emits a specific sound. Since the buzzer provided in the present application has excellent waterproof properties and good sounding effect, the user experience of the electronic device using the buzzer is better, thereby making the electronic device more competitive in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a traditional buzzer provided in an embodiment of the present application;

[0018] Figure 2 Another structural diagram of a traditional buzzer provided in an embodiment of the present application;

[0019] Figure 3 for Figure 2 AA cross-sectional view of the buzzer shown in;

[0020] Figure 4 A schematic diagram of the structure of a buzzer provided in an embodiment of the present application;

[0021] Figure 5 for Figure 4 BB cross-section of the buzzer shown in;

[0022] Figure 6 for Figure 4 Exploded diagram of the buzzer shown in ;

[0023] Figure 7 Another structural diagram of the buzzer provided in an embodiment of the present application;

[0024] Figure 8 for Figure 7 An enlarged view of the local structure of the buzzer at position C shown in FIG;

[0025] Figure 9 Another structural diagram of the buzzer provided in an embodiment of the present application;

[0026] Figure 10 Another structural schematic diagram of the buzzer provided in an embodiment of the present application.

[0027] Reference numerals:

[0028] 10-shell; 1-cover plate; 101-sound hole; 102-waterproof breathable membrane; 2-bottom plate; 201-center column; 3-side plate; 20-vibrating diaphragm;

[0029] 2001 - first surface; 2002 - second surface; 30 - magnet; 40 - coil; 50 - elastic film. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be understood as being limited to the embodiments set forth herein. The same figure marks in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all explained with reference to the accompanying drawings as examples, but changes can be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings in the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0031] It should be noted that the following description sets forth specific details to facilitate understanding of the present application. However, the present application can be implemented in a variety of other ways than those described herein, and those skilled in the art may make similar generalizations without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0032] In order to facilitate the understanding of the buzzer provided by this application, its application scenarios are first introduced below. The buzzer provided by this application can be used in, but not limited to, electronic devices such as mobile phones, personal computers (PCs), wearable devices, electronic toys or vehicle-mounted devices. The buzzer is an electroacoustic device with an integrated structure, and its main function is to make sounds. Figure 1 , Figure 1 A schematic diagram of the structure of a traditional buzzer provided in an embodiment of the present application is shown. Figure 1 The buzzer includes a sound hole 101, through which air flows in and out of the buzzer, so that the sound generated by the buzzer is transmitted out through the sound hole 101. Since the sound hole 101 is used to connect the internal space of the buzzer with the outside world, the liquid or water vapor outside can flow in and out of the buzzer according to the sound hole 101. Figure 1 The direction indicated by the arrow shown in FIG enters the interior of the buzzer from the sound hole 101 , and the components inside the buzzer will be damaged by the corrosion of liquid or water vapor, thereby reducing the service life of the buzzer.

[0033] In order to reduce the risk of damage to the components inside the buzzer, various waterproof designs of buzzers have been proposed in the art. Figure 2 , Figure 2 This is another structural diagram of a traditional buzzer provided in an embodiment of the present application, in which the sound hole 101 is blocked by a waterproof and breathable membrane 102. Figure 3 , Figure 3for Figure 2 The AA cross-sectional view of the buzzer is shown in the figure. Figure 2 and Figure 3 In this buzzer, the internal space of the buzzer is isolated from the outside world by a waterproof breathable membrane 102, preventing external liquids or water vapor from entering the buzzer, thereby achieving waterproofness. This solution has a good waterproof effect, but because the sound hole 101 is blocked by the waterproof breathable membrane 102, it will significantly affect the sound effect of the buzzer. If the waterproof breathable membrane 102 is severely contaminated, it will cause the buzzer to malfunction.

[0034] In order to reduce the impact on the sound effect of the buzzer, some current buzzers also adopt the method of setting a waterproof cover on the outside of the sound hole 101 to achieve waterproofness, but this solution can only achieve waterproofness in a specific direction, and its application scenarios are relatively limited. In addition, some buzzers are provided with water-absorbing materials, but they can only achieve conventional moisture-proofness and have extremely limited waterproof capabilities. In addition, some buzzers are also provided with drainage holes so that the liquid or water vapor entering the inside of the buzzer can be discharged to the outside through the drainage holes. However, since the liquid or water vapor still needs to enter the interior of the buzzer, the components inside the buzzer are still at a greater risk of corrosion damage.

[0035] In view of this, the buzzer provided by the present application uses an elastic film to seal the gap between the vibrating diaphragm and the shell. This can not only not significantly affect the movement of the vibrating diaphragm, but also effectively block the liquid or water vapor entering the buzzer from the outside through the sound hole between the vibrating diaphragm and the sound hole. Thus, while ensuring the sound effect of the buzzer, the risk of corrosion of the components inside the buzzer due to contact with liquid or water vapor is reduced, thereby extending the service life of the buzzer. In order to facilitate understanding of the technical solution of the present application, the buzzer provided by the present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figure 4 , Figure 4 This is a schematic diagram of the structure of a buzzer provided in an embodiment of the present application. The buzzer includes a housing 10, which includes a cover 1 and a base 2. The cover 1 includes a sound hole 101, and the cover 1 and base 2 are arranged opposite each other. In this buzzer, the housing 10 has a cavity for accommodating various functional components, and the sound generated by the buzzer can be transmitted through the sound hole 101.

[0037] like Figure 4 As shown, the housing 10 further includes a peripheral side plate 3, which is located between the cover plate 1 and the bottom plate 2, and the cover plate 1 and the bottom plate 2 are respectively connected to one end surface of the peripheral side plate 3, so that the cover plate 1, the bottom plate 2 and the peripheral side plate 3 form a cavity of the housing 10. In this application, the specific shape of the housing 10 is not limited, and its exemplary shape can be Figure 4In the cylindrical structure shown in FIG, the cover plate 1 and the bottom plate 2 may both be circular plate structures, while the peripheral side plate 3 may be a cylindrical structure. In other possible embodiments of the present application, the housing 10 may also have other possible regular or irregular shapes, which are not listed here one by one, but should be understood to fall within the scope of protection of the present application.

[0038] Reference Figure 5 , Figure 5 for Figure 4 The buzzer further includes a vibration diaphragm 20, wherein the vibration diaphragm 20 is located between the cover plate 1 and the bottom plate 2. In addition, the vibration diaphragm 20 can vibrate between the cover plate 1 and the bottom plate 2 to generate sound.

[0039] In order to understand the sound principle of the buzzer provided by this application, please refer to Figure 6 , Figure 6 for Figure 4 . In the present application, the material of the vibration diaphragm 20 can be a metal or metal alloy such as iron or iron alloy, and the material of the bottom plate 2 of the housing 10 can also be a metal or metal alloy such as iron or iron alloy. In addition, the buzzer also includes a magnet 30, which can be accommodated in the cavity of the housing 10, so that the vibration diaphragm 20 is connected to the bottom plate 2 by adsorption of the magnet 30, the bottom plate 2 and the vibration diaphragm 20.

[0040] Can refer to Figure 5 and Figure 6 The bottom plate 2 of the housing 10 further includes a center column 201, which extends toward the cover plate 1 and is spaced apart from the vibrating diaphragm 20. Furthermore, the buzzer further includes a coil 40, which is housed in the cavity of the housing 10 and sleeved around the center column 201. In this application, the coil 40 can be wound from copper or aluminum wire and can be used to conduct current.

[0041] In this application, the material of the center column 201 is not limited. For example, the material of the center column 201 can be a magnetizable metal or metal alloy such as iron or an iron alloy. Thus, when current is passed through the coil 40, the center column 201 is magnetized by the electric field formed by the coil 40, allowing the center column 201 to attract the vibrating diaphragm 20, that is, causing the portion of the vibrating diaphragm 20 opposite the center column 201 to move toward the center column 201. Furthermore, it is understood that when the current is stopped from passing through the coil 40, the magnetism of the center column 201 disappears, releasing the vibrating diaphragm 20, allowing the portion of the vibrating diaphragm 20 opposite the center column 201 to move toward the cover plate 1.

[0042] Based on this, a periodic current can be passed through the coil 40 to make the coil 40 generate a periodically changing magnetic field, so that the center column 201 periodically absorbs or releases the vibration diaphragm 20, so as to achieve the purpose of making the vibration diaphragm 20 form periodic vibration between the cover plate 1 and the center column 201, thereby generating sound.

[0043] It is worth mentioning that in the buzzer provided in this application, the cover plate 1 and the peripheral side plate 3 can be made of non-metallic materials such as plastic, which is beneficial to reducing the weight of the buzzer and reducing the cost of the buzzer.

[0044] In order to realize the waterproof design of the buzzer, such as Figure 5 As shown, the buzzer also includes an elastic film 50, the vibration diaphragm 20 is connected to the elastic film 50, and the elastic film 50 is connected to the inner wall of the shell 10, and the elastic film 50 blocks the gap between the peripheral edge of the vibration diaphragm 20 and the inner wall of the shell 10, so as to achieve the effect of the elastic film 50 sealing the gap between the vibration diaphragm 20 and the inner wall of the shell 10, thereby effectively blocking the liquid or water vapor from the outside entering the inside of the buzzer through the sound hole 101 between the structure formed by the connection between the vibration diaphragm 20 and the elastic film 50 and the sound hole 101, thereby ensuring the sound effect of the buzzer while reducing the risk of corrosion of the components inside the buzzer due to contact with liquid or water vapor, thereby extending the service life of the buzzer.

[0045] The material of the elastic film 50 is not limited in this application; exemplary materials include hydrophobic and highly elastic films such as silicone or rubber films. Furthermore, the thickness of the elastic film 50 can be, but is not limited to, 10 to 50 microns. This minimizes the impact of the elastic film 50 on the vibration of the diaphragm 20, ensuring the sound quality of the buzzer. Furthermore, it ensures the structural reliability of the elastic film 50, effectively making the buzzer waterproof.

[0046] It is worth mentioning that in the buzzer provided in this application, the elastic film 50 can be connected to the inner wall of the housing 10 in a variety of ways. For example, Figure 5 As shown, part of the elastic film 50 can be located between the cover plate 1 and the surrounding side plate 3, so that the elastic film 50 can be connected to at least one of the cover plate 1 and the surrounding side plate 3 to fix the part of the elastic film 50 between the cover plate 1 and the surrounding side plate 3.

[0047] When the elastic film 50 is connected to the cover plate 1, the two can be bonded using an adhesive. Specifically, the elastic film 50 can be bonded to the surface of the cover plate 1 facing the peripheral side plate 3, thereby making the connection between the elastic film 50 and the cover plate 1 more flexible. Alternatively, the elastic film 50 and the cover plate 1 can be formed into an integral structure through a process such as injection molding to improve the reliability of the connection between the elastic film 50 and the cover plate 1.

[0048] When the elastic film 50 is connected to the peripheral side panel 3, the two may also be bonded together using an adhesive. Specifically, the elastic film 50 may be bonded to the end surface of the peripheral side panel 3 facing the cover plate 1, or the elastic film 50 may be bonded to the inner side wall of the peripheral side panel 3, to increase the flexibility of the connection between the elastic film 50 and the peripheral side panel 3. Furthermore, the elastic film 50 and the peripheral side panel 3 may be formed into an integral structure by a process such as injection molding, to provide a more reliable connection between the elastic film 50 and the peripheral side panel 3.

[0049] In another possible embodiment of the present application, part of the elastic film 50 can be placed on the end surface of the surrounding side plate 3 facing the cover plate 1, but the elastic film 50 is not directly connected to the surrounding side plate 3 and the cover plate 1. Instead, the part of the elastic film 50 is pressed between the cover plate 1 and the surrounding side plate 3 through the connection between the cover plate 1 and the surrounding side plate 3, which can simplify the assembly process of the buzzer and improve the assembly efficiency of the buzzer.

[0050] It should be noted that the above are only some exemplary descriptions of the connection method between the elastic film 50 and the inner wall of the shell 10. In other embodiments of the present application, the elastic film 50 and the inner wall of the shell 10 can also be connected through other possible methods, which are not listed one by one here, but they should all be understood to fall within the scope of protection of this application.

[0051] In the buzzer provided herein, the elastic film 50 and the vibrating diaphragm 20 can be connected in a variety of ways. For example, the elastic film 50 and the vibrating diaphragm 20 can be bonded using an adhesive to provide a more flexible connection. Alternatively, the elastic film 50 and the vibrating diaphragm 20 can be formed into an integrally formed structure through a process such as injection molding to improve the reliability of the connection between the elastic film 50 and the vibrating diaphragm 20 and help reduce the impact of the elastic film 50 on the vibration of the vibrating diaphragm 20, thereby ensuring the sound effect of the buzzer.

[0052] In addition, the specific configuration of the elastic film 50 is not limited in the embodiment of the present application. For example, Figure 5 and Figure 6 In the buzzer shown, the elastic film 50 can be a continuous film layer structure, and along the direction from the cover plate 1 to the base plate 2, the elastic film 50 covers the vibration diaphragm 20, which is beneficial to improving the reliability of the elastic film 50 in sealing the gap between the peripheral edge of the vibration diaphragm 20 and the inner wall of the shell 10, thereby ensuring the waterproof effect of the buzzer.

[0053] Reference Figure 7 , Figure 7This is another structural diagram of the buzzer provided in the embodiment of the present application. The difference from the buzzer described above is that: Figure 7 The portion of the elastic film 50 of the buzzer shown extends to the side of the vibration diaphragm 20 facing away from the cover 1. Figure 8 , Figure 8 for Figure 7 The enlarged view of the partial structure of the buzzer at position C is shown in FIG. The vibrating diaphragm 20 includes a first surface 2001 facing the cover plate 1 and a second surface 2002 facing the base plate 2. The elastic film 50 is connected to both the first surface 2001 and the second surface 2002 of the vibrating diaphragm 20. In this application, the elastic film 50 adopts the above-mentioned design, which effectively improves the reliability of the connection between the elastic film 50 and the vibrating diaphragm 20, thereby effectively achieving waterproofing of the buzzer.

[0054] Figure 7 Other structures of the buzzer shown can refer to Figure 5 The buzzer is set as shown in the figure, which will not be described in detail here.

[0055] It is worth mentioning that in the above Figure 5 and Figure 7 In the illustrated buzzer, the specific arrangement of the elastic film 50 is described using the example of the elastic film 50 covering the first surface 2001 of the vibrating diaphragm 20. In other possible embodiments of the present application, the elastic film 50 may also cover the second surface 2002 of the vibrating diaphragm 20, that is, at least a portion of the elastic film 50 is located between the vibrating diaphragm 20 and the magnet 30. This still achieves the purpose of the elastic film 50 sealing the gap between the peripheral edge of the vibrating diaphragm 20 and the inner wall of the housing 10.

[0056] In addition, the elastic film 50 may also be arranged in other possible ways, for example, refer to Figure 9 , Figure 9 Another schematic diagram of the structure of the buzzer provided in an embodiment of the present application illustrates another specific arrangement of the elastic film 50. The elastic film 50 covers both the first surface 2001 and the second surface 2002 of the vibrating diaphragm 20, completely enveloping the vibrating diaphragm 20. This ensures a more reliable connection between the elastic film 50 and the vibrating diaphragm 20 and enhances the buzzer's waterproofing.

[0057] Figure 9 Other structures of the buzzer shown can refer to Figure 5 The buzzer is set as shown in the figure, which will not be described in detail here.

[0058] For example, Figure 10In the buzzer shown, the elastic film 50 can also be a ring structure, and along the direction from the cover plate 1 to the bottom plate 2, the elastic film 50 covers a portion of the vibration diaphragm 20, that is, the elastic film 50 covers a portion of the first surface 2001 of the vibration diaphragm 20. In this way, the elastic film 50 can seal the gap between the vibration diaphragm 20 and the inner wall of the shell 10 while effectively reducing the influence of the elastic film 50 on the vibration of the vibration diaphragm 20, thereby helping to improve the sound effect of the buzzer.

[0059] In addition, Figure 10 In the buzzer shown, part of the elastic film 50 also extends to the second surface 2002 of the vibration diaphragm 20, and the elastic film 50 is connected to the first surface 2001 and the second surface 2002 of the vibration diaphragm 20 at the same time, so as to effectively improve the connection reliability between the elastic film 50 and the vibration diaphragm 20.

[0060] Figure 10 Other structures of the buzzer shown can refer to Figure 5 The buzzer is set as shown in the figure, which will not be described in detail here.

[0061] Based on the arrangement of the elastic film 50 in the above-mentioned embodiments of the present application, a series of variations can be made to the specific implementation of the connection between the elastic film 50 and the vibrating diaphragm 20. For example, the elastic film 50 can be connected to the peripheral edge of the vibrating diaphragm 20. That is, in the buzzer provided by the present application, the elastic film 50 and the vibrating diaphragm 20 can be stacked, or the elastic film 50 can wrap part or all of the vibrating diaphragm 20, or the elastic film 50 and the vibrating diaphragm 20 can be coplanar, etc., as long as the elastic film 50 can at least block the gap between the peripheral edge of the vibrating diaphragm 20 and the inner wall of the housing 10. All possible arrangements of the elastic film 50 are not listed here, but they should all be understood to fall within the scope of protection of the present application.

[0062] In addition, in the above embodiments of the present application, the specific implementation method of waterproofing the buzzer is described using an electromagnetic buzzer as an example. However, when the buzzer is of other types, the waterproof design can still refer to the specific configuration methods of the buzzer provided in the above embodiments. For example, when the buzzer is a piezoelectric buzzer, the difference between it and the above electromagnetic buzzer is only the different driving method for generating vibration of the vibrating diaphragm 20. Therefore, its waterproof structure can be set with reference to the waterproof structure of the buzzer provided in any of the above embodiments, and its detailed description is not repeated here.

[0063] In summary, the buzzer provided in the present application can seal the gap between the peripheral edge of the vibration diaphragm 20 and the inner side of the shell 10 through the elastic film 50 connected to the vibration diaphragm 20 and the inner side of the shell 10, so that the liquid and water vapor entering the interior of the shell 10 of the buzzer through the sound hole 101 can be blocked between the structure formed by the connection between the vibration diaphragm 20 and the elastic film 50 and the sound hole 101, thereby ensuring the sound effect of the buzzer while reducing the risk of corrosion of the components inside the buzzer due to contact with liquid or water vapor, thereby extending the service life of the buzzer.

[0064] The buzzer provided in the above embodiment of the present application can be applied to various electronic devices with sound alarm requirements. The electronic device also includes a control circuit, which is electrically connected to the buzzer. For example, when the buzzer is an electromagnetic buzzer, the control circuit can be electrically connected to the coil 40 to control the periodicity of the current passed through the coil 40, thereby controlling the vibration pattern of the vibrating diaphragm 20 so that the buzzer emits a specific sound. In addition, when the buzzer is a piezoelectric buzzer, the control circuit can be electrically connected to the piezoelectric sheet to control the periodicity of the current passed through the piezoelectric sheet, thereby controlling the vibration pattern of the vibrating diaphragm 20 so that the buzzer emits a specific sound. Since the buzzer provided in the present application has better waterproof properties and better sounding effect, the user experience of the electronic device using the buzzer is better, thereby making the electronic device have higher market competitiveness.

[0065] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A buzzer, characterized in that: The invention comprises a housing, a vibrating diaphragm and an elastic film, wherein the vibrating diaphragm and the elastic film are accommodated in a cavity of the housing, wherein: The housing includes a cover plate and a bottom plate, the cover plate includes a sound hole, and the cover plate is arranged opposite to the bottom plate; The vibration diaphragm is located between the cover plate and the bottom plate, the vibration diaphragm is connected to the elastic film, the elastic film is connected to the inner wall of the shell, and the elastic film blocks the gap between the peripheral edge of the vibration diaphragm and the inner wall of the shell.

2. The buzzer according to claim 1, wherein: Along the direction from the cover plate to the bottom plate, the elastic film covers the vibration diaphragm.

3. The buzzer according to claim 1, wherein: The elastic film is an annular structure, and covers a portion of the vibration diaphragm along a direction from the cover plate to the bottom plate.

4. The buzzer according to claim 2 or 3, characterized in that: Part of the elastic film extends to the side of the vibration diaphragm facing away from the cover plate. The vibration diaphragm includes a first surface facing the cover plate and a second surface facing the base plate. The elastic film is connected to the first surface and the second surface of the vibration diaphragm.

5. The buzzer according to any one of claims 1 to 4, characterized in that: The elastic film is bonded to the vibration diaphragm; or the elastic film and the vibration diaphragm are an integrally formed structure.

6. The buzzer according to any one of claims 1 to 5, characterized in that: The housing further includes a peripheral side plate, the peripheral side plate being located between the cover plate and the bottom plate, and the cover plate and the bottom plate being connected to one end surface of the peripheral side plate respectively, and the cover plate, the bottom plate and the peripheral side plate enclose the cavity of the housing; Part of the elastic film is fixed between the cover plate and the peripheral side plate.

7. The buzzer according to claim 6, wherein: The elastic film is bonded to the peripheral side plate; or the elastic film and the peripheral side plate are an integrally formed structure.

8. The buzzer according to any one of claims 1 to 7, wherein: The elastic film is bonded to the cover plate; or the elastic film and the cover plate are an integrally formed structure.

9. The buzzer according to any one of claims 1 to 8, characterized in that: The buzzer further includes a magnet, which is accommodated in the cavity of the shell and is attracted to the bottom plate and the vibration diaphragm.

10. The buzzer according to any one of claims 1 to 9, characterized in that: The bottom plate includes a center column, the center column extends toward the cover plate, the vibration diaphragm is located between the center column and the cover plate, and the center column and the vibration diaphragm are spaced apart; The buzzer further includes a coil, which is accommodated in the cavity of the shell and sleeved on the middle column.

11. An electronic device, characterized in that: The device comprises a control circuit and the buzzer according to any one of claims 1 to 10, wherein the control circuit is electrically connected to the buzzer.

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