Sound production device and open type audio equipment

Abstract

The utility model discloses a sounding device and open-type audio equipment, and the sounding device comprises a housing which is provided with an accommodation cavity and a first opening communicated with the accommodation cavity, and the first opening is disposed on the front surface of the housing; the vibration assembly is arranged in the containing cavity and divides the containing cavity into a first cavity body and a second cavity body, and the first cavity body communicates with the first opening; the vibration assembly comprises a vibration piece and a folding ring, the folding ring is connected with the vibration piece and the shell, and an acoustic short circuit hole is formed in the folding ring and communicates with the first cavity and the second cavity; when the open type audio equipment is worn by a user, the front surface of the shell is attached to the skin of the user to seal the first opening, and the vibration piece can vibrate to transmit vibration to the attached skin. According to the utility model, the first opening is sealed through the fitting contact of the shell and the skin, so that sound cannot leak from the first opening and is blocked in the shell, and sound leakage is prevented; the sound short-circuit hole reduces air guide sound leakage, and the sound leakage prevention effect is further enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of electroacoustic product technology. More specifically, this utility model relates to a sound-generating device and an open-type audio device. Background Technology

[0002] Open-back audio devices are widely used compared to in-ear audio devices due to their comfortable wearing experience. However, open-back headphones and hearing aids commonly suffer from sound leakage problems, especially in mid-to-high frequency audio sources, which can lead to privacy breaches. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model innovatively provides a sound-generating device and an open-type audio device. By sealing the first opening through the contact between the outer shell and the skin, the vibrating element can vibrate to transmit the vibration to the skin, preventing sound leakage from the first opening and blocking the sound inside the outer shell to prevent sound leakage. The acoustic short-circuit hole of the folded ring connects the first cavity and the second cavity, forming an acoustic short circuit in the gas conduction path to reduce air conduction sound leakage, further enhancing the sound leakage prevention effect, and thus effectively protecting user information.

[0004] To achieve the aforementioned technical objectives, the first aspect of this utility model discloses a sound-generating device, comprising:

[0005] The outer casing has a receiving cavity and a first opening communicating with the receiving cavity, the first opening being disposed on the front surface of the outer casing;

[0006] A vibration assembly is disposed within the receiving cavity and divides the receiving cavity into a first cavity and a second cavity, the first cavity being connected to the first opening; the vibration assembly includes a vibrating element and a folded ring, the folded ring connecting the vibrating element to the outer shell, and the folded ring having an acoustic short-circuit hole connecting the first cavity and the second cavity;

[0007] When the open-back audio device is worn by a user, the front surface of the housing fits against the user's skin to seal the first opening, and the vibrator is able to vibrate to transmit vibrations to the skin in contact with the device.

[0008] Furthermore, it also includes a voice coil and a magnetic circuit system, the magnetic circuit system being disposed within the second cavity, the magnetic circuit system having a magnetic gap, one end of the voice coil being connected to the folded ring, and the other end being inserted into the magnetic gap.

[0009] Furthermore, it also includes a voice coil and a magnetic circuit system. The end of the housing opposite to the front surface is provided with a second opening. The second opening communicates with the second cavity. The magnetic circuit system is disposed in the second cavity and closes the second opening. The magnetic circuit system is provided with a magnetic gap. One end of the voice coil is connected to the folded ring, and the other end is inserted into the magnetic gap.

[0010] Furthermore, the folded ring is an annular structure with a hollow hole, which serves as the acoustic short-circuit hole.

[0011] Furthermore, the fold ring includes a plurality of bends arranged circumferentially along the vibrating element, with gaps between adjacent bends, the gaps serving as acoustic short-circuit holes.

[0012] Furthermore, the bent portion is arc-shaped, zigzag-shaped, or spiral-shaped.

[0013] Furthermore, the inner end of the folded ring is provided with an inner mounting part for fixed connection with the vibrating element, and the outer end of the folded ring is provided with an outer mounting part for fixed connection with the outer shell.

[0014] Furthermore, the vibrating element is ring-shaped or plate-shaped.

[0015] Furthermore, it also includes a cushioning pad, which is disposed on the front surface of the vibrating element for contact with the user's skin.

[0016] Furthermore, the outer casing includes a first housing and a sealing ring, the sealing ring being disposed on the front surface of the outer first housing.

[0017] Furthermore, the outer shell includes a first shell and a second shell, the second shell being fitted over the first shell and spaced apart from the first shell, and the front surface of the second shell being flush with or protruding from the front surface of the first shell.

[0018] Furthermore, the outer casing also includes a sealing ring disposed on the front surface of the second housing.

[0019] Alternatively, the sealing ring may be disposed on the front surface of the first housing and the front surface of the second housing.

[0020] Furthermore, the outer shell includes a first shell and a second shell with multiple inner and outer layers. The second shell is fitted over the first shell and is spaced apart from the first shell. There is a gap between adjacent second shells. The front surface of the outermost second shell is flush with or protrudes from the front surfaces of the other shells.

[0021] Furthermore, the housing also includes a sealing ring, which is provided at least on the front surface of the outermost second housing in the first housing and the second housing.

[0022] Furthermore, the sealing ring is disposed on the front surface of the first housing and the front surfaces of all the second housings.

[0023] Furthermore, the second housing and the first housing are connected by a first connector, which is an annular structure with a hollow hole, or the first connector includes a plurality of first connecting parts arranged circumferentially along the first housing and the second housing, with a preset distance between adjacent first connecting parts.

[0024] Furthermore, the innermost second shell and the first shell are connected by a first connector, and adjacent second shells are connected by a second connector. The first connector is an annular structure with a hollow hole, or the first connector includes a plurality of first connecting parts arranged circumferentially along the first shell and the second shell, with a preset distance between adjacent first connecting parts. The second connector is an annular structure with a hollow hole, or the second connector includes a plurality of second connecting parts arranged circumferentially along the shell to which it is connected, with a preset distance between adjacent second connecting parts.

[0025] To achieve the above-mentioned technical objectives, the second aspect of this utility model discloses an open-type audio device, including the sound-generating device described in the first aspect.

[0026] The beneficial effects of this utility model are as follows:

[0027] The sound-generating device of this utility model seals the first opening by having the outer shell in contact with the skin. The vibrating element can vibrate to transmit the vibration to the skin in contact with the skin, and the sound will not leak from the first opening. The sound is blocked inside the outer shell to prevent sound leakage. The acoustic short-circuit hole of the folded ring connects the first cavity and the second cavity, forming an acoustic short circuit in the gas conduction path to reduce air conduction sound leakage, further enhance the sound leakage prevention effect, and thus effectively protect user information. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the sound-generating device according to the first embodiment of this utility model.

[0029] Figure 2 yes Figure 1 Top view of the sound-generating device shown.

[0030] Figure 3 yes Figure 1 The longitudinal sectional view of the sound-generating device shown.

[0031] Figure 4This is a longitudinal sectional view of the sound-generating device according to the second embodiment of this utility model.

[0032] Figure 5 This is a top view of a folded ring according to an embodiment of the present invention.

[0033] Figure 6 This is a top view of a folded ring according to another embodiment of the present invention.

[0034] Figure 7 This is a top view of a folded ring according to another embodiment of the present invention.

[0035] Figure 8 This is a top view of a folded ring according to another embodiment of the present invention.

[0036] Figure 9 This is a structural schematic diagram of the sound-generating device according to the third embodiment of this utility model.

[0037] Figure 10 yes Figure 9 The longitudinal sectional view of the sound-generating device shown.

[0038] Figure 11 This is a longitudinal sectional view of the sound-generating device according to the fourth embodiment of this utility model.

[0039] In the picture,

[0040] 1. Outer shell; 10. Sealing ring; 11. First housing; 12. Second housing; 111. First boss; 112. Second boss; 13. First connector; 131. First connecting part; 132. First inner mounting part; 133. First outer mounting part; 14. Second connector; 100. Receiving cavity; 101. First cavity; 102. Second cavity; 103. Third cavity; 104. Fourth cavity; 2. Vibration assembly; 21. Vibrating element; 22. Folded ring; 220. Acoustic short circuit hole; 221. Bending part; 222. Inner mounting part; 223. Outer mounting part; 3. Voice coil; 4. Magnetic circuit system; 40. Magnetic gap; 41. Magnetic guide plate; 42. Magnet; 421. Center magnet; 422. Side magnet; 43. Washer; 431. Center washer; 432. Side washer; 5. Buffer pad. Specific Implementation

[0041] The sound-generating device and open-type audio equipment provided by this utility model will be explained and described in detail below with reference to the accompanying drawings.

[0042] This embodiment specifically discloses a sound-generating device. This sound-generating device is used in open-back audio devices, such as open-back headphones (e.g., bone conduction headphones) or open-back hearing aids. Figure 1-4As shown, the sound-generating device includes a housing 1 and a vibration component 2. The housing 1 has a receiving cavity 100 and a first opening communicating with the receiving cavity 100. The first opening is located on the front surface of the housing 1, which is the end surface near the user's ear. In this embodiment, the side near the user's ear is defined as the front, and the other side opposite to the front is defined as the rear. That is, the front end of the housing 1 is the end near the user's ear, and the rear end of the housing 1 is the end away from the user's ear. Vibration component 2 is disposed within receiving cavity 100, dividing receiving cavity 100 into first cavity 101 and second cavity 102. First cavity 101 is connected to first opening. Vibration component 2 includes vibrating element 21 and folded ring 22. Folded ring 22 connects vibrating element 21 to outer shell 1. Inner end of folded ring 22 is fixedly connected to vibrating element 21, and outer end of folded ring 22 is fixedly connected to outer shell 1. Folded ring 22 is provided with acoustic short-circuit hole 220, which connects first cavity 101 and second cavity 102. When the open-back audio device is worn by the user, the front surface of outer shell 1 is in contact with the user's skin to seal the first opening, and vibrating element 21 can vibrate to transmit vibration to the skin in contact.

[0043] When an open-back audio device is worn, it requires a clamping force from components such as ear clips to secure it near the user's ear. This clamping force allows the front surface of the outer shell 1 to fit tightly against the skin, which seals the first opening of the outer shell 1, preventing sound leakage. This isolates the sound inside the outer shell 1, thus preventing sound leakage. The vibrating element 21 vibrates to conduct sound, and the acoustic short-circuit hole 220 on the surround 22 connects the first cavity 101 and the second cavity 102, forming an acoustic short circuit in the gas conduction path. This reduces air conduction sound leakage, further enhancing the sound leakage prevention effect and effectively protecting user information.

[0044] In one alternative embodiment, such as Figure 3 As shown, the sound-generating device also includes a voice coil 3 and a magnetic circuit system 4. The magnetic circuit system 4 is located within the second cavity 102 and has a magnetic gap 40. One end of the voice coil 3 is connected to the folded ring 22, and the other end is inserted into the magnetic gap 40. The magnetic circuit system 4 generates a magnetic field, which drives the voice coil 3 to vibrate, thereby driving the vibrating assembly 2 to vibrate and conduct sound. Figure 3 As shown, in this embodiment, the rear end of the outer shell 1 is a closed end, that is, the rear end of the second cavity 102 is closed. The magnetic circuit system 4 is disposed inside the second cavity 102 and fixed to the inner surface of the rear end of the outer shell 1. When the open-back audio device is worn by the user, the front surface of the outer shell 1 fits against the user's skin to seal the first opening. The first cavity 101 and the second cavity 102 become sealed cavities. The sealed cavities passively insulate against mid-to-high frequency sound sources to prevent sound leakage, further enhancing the sound leakage prevention effect, thereby protecting user information.

[0045] In another alternative embodiment, such as Figure 4 As shown, the sound-generating device also includes a voice coil 3 and a magnetic circuit system 4. A second opening is provided at the end (rear end) of the outer shell 1 opposite to the front surface, communicating with the second cavity 102. The magnetic circuit system 4 is located in the second cavity 102 and seals the second opening. The magnetic circuit system 4 generates a magnetic field and includes a magnetic gap 40. One end of the voice coil 3 is connected to the folded ring 22, and the other end is inserted into the magnetic gap 40. The magnetic circuit system 4 drives the voice coil 3 to vibrate, thereby driving the vibrating assembly 2 to vibrate and conduct sound. When the open-back audio device is worn by the user, the front surface of the outer shell 1 fits against the user's skin to seal the first opening, and the magnetic circuit system 4 seals the second opening. The first cavity 101 and the second cavity 102 become sealed cavities. These sealed cavities passively insulate against mid-to-high frequency sound sources to prevent sound leakage, further enhancing the anti-leakage effect and thus protecting user information.

[0046] The specific shape of the outer shell 1 can be set as needed, as long as it enables the first cavity 101 and the second cavity 102 to become sealed cavities to block the sound inside the outer shell 1.

[0047] In one alternative embodiment, such as Figure 5 As shown, the folded ring 22 is an annular structure with perforated holes, which serve as acoustic short-circuit holes 220. The annular structure can be a planar structure or a forward-arching protrusion. The perforated holes can be circular, elliptical, square, rhomboid, rectangular, or irregular in shape. This application does not impose any special limitations on the number or specific shape of the perforated holes. The inner edge of the annular structure is fixedly connected to the vibrating element 21, and the outer edge of the annular structure is fixedly connected to the outer shell 1. The fixing method can be adhesive bonding.

[0048] In another alternative embodiment, such as Figure 6 As shown, the folded ring 22 includes a plurality of bent portions 221 arranged circumferentially along the vibrating member 21, with gaps between adjacent bent portions 221, which serve as acoustic short-circuit holes 220. The number of bent portions 221 and the size of the gaps can be set as needed, and this application does not impose any special limitations. The inner end of the bent portion 221 is fixedly connected to the vibrating member 21, and the outer end of the bent portion 221 is fixedly connected to the outer shell 1. The fixing method can be adhesive bonding.

[0049] Preferably, the bent portion 221 is arc-shaped, zigzag-shaped, or spiral-shaped.

[0050] In some embodiments, such as Figure 7 and 8 As shown, the inner end of the folded ring 22 is provided with an inner mounting portion 222 for fixed connection with the vibrating element 21, and the outer end of the folded ring 22 is provided with an outer mounting portion 223 for fixed connection with the outer casing 1. Figure 7 As shown, the inner mounting part 222 is arranged in a ring shape within the inner circle of the ring structure, and the outer mounting part 223 is arranged in a ring shape within the outer circle of the ring structure. Figure 8 As shown, multiple inner mounting portions 222 are independently and arc-shaped at the inner end of the bent portion 221, and multiple outer mounting portions 223 are independently and arc-shaped at the outer end of the bent portion 221. All inner mounting portions 222 can also be integrally formed into a ring for easy connection with the vibrating element 21, and all outer mounting portions 223 can also be integrally formed into a ring for easy connection with the outer shell 1. The integrally formed inner mounting portions 222 and outer mounting portions 223 connect all the bent portions 221 into a single unit. The arrangement of the inner mounting portions 222 and outer mounting portions 223 facilitates the fixed connection of the folded ring 22 with the vibrating element 21 and the outer shell 1. Preferably, the inner mounting portions 222 are bonded to the vibrating element 21, and the outer mounting portions 223 are bonded to the outer shell 1.

[0051] The folded ring 22 can be an asymmetrical or symmetrical structure. Preferably, the folded ring 22 is a centrally symmetrical and axisymmetric structure. That is, the perforated holes are evenly distributed along the circumference and radial direction of the ring structure, and the bent portions 221 are evenly distributed along the circumference of the vibrating element 21, so that the sound is transmitted in a balanced manner.

[0052] The material of the fold ring 22 can be PU (polyurethane), PET (polyethylene terephthalate), silicone, rubber or stainless steel.

[0053] In one alternative embodiment, the vibrating element 21 is ring-shaped or plate-shaped. This application does not impose any particular limitation on the specific shape of the vibrating element 21, as long as it can vibrate and transmit the vibration to the skin it is in contact with.

[0054] In one alternative embodiment, such as Figure 1-4 As shown, the sound-generating device also includes a buffer pad 5, which is disposed on the front surface of the vibrating component 21 for contact with the user's skin. The buffer pad 5 is used to buffer the vibration of the vibrating component 2, ensuring sound transmission while improving the user's comfort when wearing the open-back audio device. The front surface of the housing 1 is flush with or protrudes from the front surface of the buffer pad 5, ensuring that the front surface of the housing 1 fits snugly against the human skin, allowing the skin to seal the first opening and block sound inside the housing 1.

[0055] The cushioning pad 5 can be made of silicone, rubber or sponge.

[0056] In an alternative embodiment, the housing 1 may include a first housing 11, the front surface of which conforms to the user's skin to seal the first opening.

[0057] In a preferred embodiment, such as Figure 1-4As shown, the housing includes a first housing 11 and a sealing ring 10, with the sealing ring 10 disposed on the front surface of the first housing 11. When the open-back audio device is worn by a user, the sealing ring 10 conforms to the user's skin to seal the first opening. The better the fit of the sealing ring 10 to the user's skin, the stronger the sealing effect, thereby enhancing the sound leakage prevention effect.

[0058] Optionally, the sealing ring 10 can be made of silicone or rubber, which has a certain degree of elasticity. When the open-back audio device is worn by the user, it can adapt to the shape of the user's skin under the action of clamping force, and fit completely with the user's skin, thus having a good sealing effect.

[0059] The outer casing 1 of this application may include one or more inner and outer casings to ensure sound leakage prevention.

[0060] like Figure 1-4 As shown, the outer shell 1 can be a single-layer shell, consisting of only one first shell 11, with a sealing ring 10 disposed on the front surface of the first shell 11.

[0061] In some embodiments, such as Figure 9 and 10 As shown, the outer casing 1 includes a first casing 11 and a second casing 12, i.e., the outer casing 1 includes two casings. The second casing 12 is fitted over the first casing 11 and spaced apart from the first casing 11. A folding ring 22 is fixedly connected to the first casing 11. The second casing 12 is a casing with an open front end and a closed rear end. The sides of the second casing 12 and the sides of the first casing 11, and the rear end of the second casing 12 and the rear end of the first casing 11 are all spaced apart. A third cavity 103 with an open front end is formed between the second casing 12 and the first casing 11. The front surface of the second casing 12 is flush with or protrudes from the front surface of the first casing 11, ensuring that when the open-back audio device is worn by the user, the front surface of the second casing 12 fits against the user's skin to seal the first opening. At the same time, it ensures that the first cavity 101, the second cavity 102, and the third cavity 103 form a sealed cavity. The sealed cavity passively insulates against mid-to-high frequency sound sources. The arrangement of the third cavity 103 is relative to... Figure 1-4 The illustrated embodiment further enhances the sound leakage prevention effect and also provides vibration damping.

[0062] Preferably, the outer shell also includes a sealing ring 10, which is disposed on the front surface of the second housing 12, or the sealing ring 10 is disposed on the front surface of the first housing 11 and the front surface of the second housing 12, to increase the fit with the user's skin, ensure that the first opening is completely sealed, and thus ensure the sound leakage prevention effect.

[0063] Optionally, the second housing 12 and the first housing 11 are connected by a first connector 13, which is an annular structure with a perforated hole. Alternatively, the first connector 13 includes a plurality of first connecting portions 131 arranged circumferentially along the first housing 11 and the second housing 12, with a preset distance between adjacent first connecting portions 131. The inner end of the first connecting portion 131 is fixedly connected to the first housing 11, and the outer end of the first connecting portion 131 is fixedly connected to the second housing 12. The number of first connecting portions 131 and the distance between them can be set as needed. The first connector 13 may use the same structure and material as the folding ring 22. The inner end of the first connector 13 may also be provided with a first inner mounting part 132 for fixed connection with the first housing 11, and the outer end of the first connector 13 may also be provided with a first outer mounting part 133 for fixed connection with the second housing 12. The structure of the first inner mounting part 132 is the same as that of the inner mounting part 222 in the above embodiment, and the structure of the first outer mounting part 133 is the same as that of the outer mounting part 223 in the above embodiment, and will not be described again here.

[0064] In other embodiments, such as Figure 11 As shown, the outer shell 1 includes a first shell 11 and a second shell 12 with multiple inner and outer shells, that is, the outer shell 1 includes at least three shells. The second shell 12 is fitted outside the first shell 11 and is spaced apart from the first shell 11. There is a gap between adjacent second shells 12. The second shell 12 is a shell with an open front end and a closed rear end. The side of the second shell 12 is spaced apart from the side of the first shell 11, and the rear end of the second shell 12 is spaced apart from the rear end of the first shell 11. The folding ring 22 is fixedly connected to the first shell 11. A third cavity 103 with an open front end is formed between the second shell 12 and the first shell 11. The sides and rear ends of two adjacent second shells 12 are spaced apart. A fourth cavity 104 with an open front end is formed between two adjacent second shells 12. The front surface of the outermost second shell 12 is flush with or protrudes from the front surfaces of the other shells, ensuring that when the open-back audio device is worn by the user, the front surface of the outermost second shell 12 fits against the user's skin to seal the first opening. The first cavity 101, the second cavity 102, the third cavity 103, and the fourth cavity 104 become sealed cavities. The sealed cavities passively insulate against mid-to-high frequency sound sources. The multi-layered cavity design further enhances the sound leakage prevention effect and further enhances the vibration reduction effect.

[0065] Preferably, the outer casing 1 includes a sealing ring 10, which is provided at least on the front surface of the outermost second casing 12. More preferably, the sealing ring 10 is provided on the front surface of the first casing 11 and the front surfaces of all second casings 12, increasing the fit with the user's skin, ensuring a complete seal of the first opening, and guaranteeing sound leakage prevention.

[0066] Optionally, the innermost second shell 12 and the first shell 11 are connected by a first connector 13, and adjacent second shells 12 are connected by a second connector 14. The first connector 13 is an annular structure with a perforated hole, or the first connector 13 includes a plurality of first connecting portions 131 arranged circumferentially along the first shell 11 and the second shell 12, with a preset distance between adjacent first connecting portions 131. The second connector 14 is an annular structure with a perforated hole, or the second connector 14 includes a plurality of second connecting portions arranged circumferentially along the shell to which it is connected, with a preset distance between adjacent second connecting portions. The structural forms of the first connector 13 and the second connector 14 are the same as those of the first connector 13 in the above embodiment, and will not be described again here.

[0067] Optionally, the front ends of the first housing 11 and the second housing 12 may be provided with an outwardly extending first boss 111, and the cross section of the sealing ring 10 may be L-shaped. The sealing ring 10 may be upside down and glued to the housing on the first boss 111.

[0068] This application prevents sound leakage by sealing the first opening through the fit between the skin and the outer shell 1, and makes the cavity inside the outer shell 1 a sealed cavity. The sealed cavity passively insulates the mid-to-high frequency sound source to prevent sound leakage. In addition, the acoustic short-circuit hole 220 on the folding ring 22 connects the first cavity 101 and the second cavity 102, forming an acoustic short circuit in the gas conduction path to reduce air conduction sound leakage, further enhancing the sound leakage prevention effect, thereby protecting user information.

[0069] The number and area of ​​the housings are set according to the requirements of the sound isolation frequency. The closer the sound source is to the low frequency, the more housings there are and the larger the area of ​​housing 1 is.

[0070] like Figure 3 , 4 As shown in Figures 10 and 11, the magnetic circuit system 4 includes a magnetic guide plate 41, a magnet 42 fixed to the front surface of the magnetic guide plate 41, and a washer 43 covering the front surface of the magnet 42. The magnetic circuit system 4 of this application is a single magnetic circuit system or a dual magnetic circuit system.

[0071] In one alternative embodiment, such as Figure 3 and 4As shown, the magnetic circuit system 4 is a dual magnetic circuit system. The magnetic guide plate 41 is flat. The magnet 42 includes a columnar central magnet 421 and an annular side magnet 422. The side magnet 422 is sleeved outside the central magnet 421. A magnetic gap 40 exists between the inner sidewalls of the central magnet 421 and the side magnet 422. The side magnet 422 and the central magnet 421 are fixed to the front surface of the magnetic guide plate 41. The rear surfaces of the side magnet 422 and the central magnet 421 can be bonded and fixed to the magnetic guide plate 41. Correspondingly, the washer 43 includes a central washer 431 and an annular side washer 432. The central washer 431 is fixed to the front surface of the central magnet 421, and the side washer 432 is fixed to the front surface of the side magnet 422. The front end of the first housing 11 may also be provided with an inwardly extending second protrusion 112, and the side magnet 422 and the side washer 432 can be engaged between the second protrusion 112 and the magnetic guide plate 41. Figure 3 As shown, the magnetic plate 41 is fixed to the inner wall of the rear end of the first housing 11. Figure 4 As shown, the first housing 11 is sleeved on the outside of the magnetic plate 41, the inner sidewall of the first housing 11 is fixedly connected to the outer sidewall of the magnetic plate 41, and the magnetic plate 41 closes the second opening of the first housing 11.

[0072] In one alternative embodiment, such as Figure 10 As shown, the magnetic circuit system 4 is a single magnetic circuit system. The magnetic guide plate 41 is U-shaped and annular, made of U-shaped iron. The magnet 42 is columnar and positioned at the center of the magnetic guide plate 41. A magnetic gap 40 exists between the magnet 42 and the magnetic guide plate 41. The rear surface of the magnet 42 can be bonded and fixed to the magnetic guide plate 41. Correspondingly, a washer 43 is fixed to the front surface of the columnar magnet 42. The first housing 11 is coaxially arranged with the magnetic guide plate 41.

[0073] In one alternative embodiment, such as Figure 11 As shown, the magnetic circuit system 4 is a single magnetic circuit system. The magnetic guide plate 41 is T-shaped and includes a first magnetic guide portion along the front-to-back direction and a second magnetic guide portion perpendicular to the front-to-back direction. The magnet 42 is annular and is sleeved outside the first magnetic guide portion of the magnetic guide plate 41. There is a magnetic gap 40 between the magnet 42 and the first magnetic guide portion of the magnetic guide plate 41. The rear surface of the magnet 42 can be bonded and fixed to the second magnetic guide portion of the magnetic guide plate 41. Correspondingly, the washer 43 is annular and fixed to the front surface of the magnet 42. The front end of the first housing 11 may also be provided with an inwardly extending second protrusion 112, and the magnet 42 and the washer 43 can be engaged between the second protrusion 112 and the magnetic guide plate 41.

[0074] This application also discloses an open-back audio device, including the sound-generating device described in the above embodiments. The open-back audio device is an open-back headphone or a hearing aid.

[0075] Verification has shown that this application can effectively prevent sound leakage from mid-to-high frequency sound sources by sealing the first opening, sealing the cavity, and short-circuiting the gas acoustic circuit.

[0076] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0077] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0078] In the description of this specification, the references to terms such as "this embodiment," "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any at least one embodiment or example. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0080] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and simple improvements made on the substantive content of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sound-generating device for use in an open-back audio device, characterized in that, include: The outer shell (1) has a receiving cavity (100) and a first opening communicating with the receiving cavity (100), the first opening being disposed on the front surface of the outer shell (1); A vibration assembly (2) is disposed within the receiving cavity (100) and divides the receiving cavity (100) into a first cavity (101) and a second cavity (102). The first cavity (101) is connected to the first opening. The vibration assembly (2) includes a vibrating element (21) and a folded ring (22). The folded ring (22) connects the vibrating element (21) to the outer shell (1). The folded ring (22) is provided with an acoustic short-circuit hole (220), which connects the first cavity (101) and the second cavity (102). When the open-back audio device is worn by a user, the front surface of the housing (1) is in contact with the user's skin to seal the first opening, and the vibrator (21) is able to vibrate to transmit the vibration to the skin in contact with the device.

2. The sound-generating device according to claim 1, characterized in that, It also includes a voice coil (3) and a magnetic circuit system (4), the magnetic circuit system (4) being disposed in the second cavity (102), the magnetic circuit system (4) having a magnetic gap (40), one end of the voice coil (3) being connected to the folded ring (22), and the other end being inserted into the magnetic gap (40).

3. The sound-generating device according to claim 1, characterized in that, It also includes a voice coil (3) and a magnetic circuit system (4). The end of the outer shell (1) opposite to the front surface is provided with a second opening. The second opening is connected to the second cavity (102). The magnetic circuit system (4) is located in the second cavity (102) and closes the second opening. The magnetic circuit system (4) is provided with a magnetic gap (40). One end of the voice coil (3) is connected to the folded ring (22), and the other end is inserted into the magnetic gap (40).

4. The sound-generating device according to claim 1, characterized in that, The folded ring (22) is an annular structure with a hollow hole, which serves as the acoustic short-circuit hole (220).

5. The sound-generating device according to claim 1, characterized in that, The fold ring (22) includes a plurality of bends (221) arranged circumferentially along the vibrating member (21), and there is a gap between adjacent bends (221), which serves as the acoustic short-circuit hole (220).

6. The sound-generating device according to claim 5, characterized in that, The bent portion (221) is arc-shaped, zigzag-shaped, or spiral-shaped.

7. The sound-generating device according to any one of claims 4-6, characterized in that, The inner end of the folded ring (22) is provided with an inner mounting part (222) for fixed connection with the vibrating member (21), and the outer end of the folded ring (22) is provided with an outer mounting part (223) for fixed connection with the outer shell (1).

8. The sound-generating device according to claim 1, characterized in that, The vibrating element (21) is ring-shaped or plate-shaped.

9. The sound-generating device according to claim 1, characterized in that, It also includes a buffer pad (5), which is disposed on the front surface of the vibrating element (21) for contact with the user's skin.

10. The sound-generating device according to claim 1, characterized in that, The outer casing (1) includes a first housing (11) and a sealing ring (10), the sealing ring (10) being disposed on the front surface of the first housing (11).

11. The sound-generating device according to claim 1, characterized in that, The outer shell (1) includes a first shell (11) and a second shell (12). The second shell (12) is fitted over the first shell (11) and spaced apart from the first shell (11). The front surface of the second shell (12) is flush with or protrudes from the front surface of the first shell (11).

12. The sound-generating device according to claim 11, characterized in that, The outer casing (1) further includes a sealing ring (10), which is disposed on the front surface of the second casing (12). Alternatively, the sealing ring (10) may be disposed on the front surface of the first housing (11) and the front surface of the second housing (12).

13. The sound-generating device according to claim 1, characterized in that, The outer shell (1) includes a first shell (11) and a second shell (12) with multiple inner and outer layers. The second shell (12) is fitted over the first shell (11) and is spaced apart from the first shell (11). There is a gap between adjacent second shells (12). The front surface of the outermost second shell (12) is flush with or protrudes from the front surfaces of the other shells.

14. The sound-generating device according to claim 13, characterized in that, The outer casing (1) also includes a sealing ring (10), which is provided at least on the front surface of the outermost second casing (12).

15. The sound-generating device according to claim 14, characterized in that, The sealing ring (10) is provided on the front surface of the first housing (11) and the front surface of all the second housings (12).

16. The sound-generating device according to claim 11, characterized in that, The second housing (12) and the first housing (11) are connected by a first connector (13). The first connector (13) is an annular structure with a hollow hole. Alternatively, the first connector (13) includes a plurality of first connecting parts (131) arranged circumferentially along the first housing (11) and the second housing (12), with a preset distance between adjacent first connecting parts (131).

17. The sound-generating device according to claim 13, characterized in that, The innermost second shell (12) and the first shell (11) are connected by a first connector (13), and adjacent second shells (12) are connected by a second connector (14). The first connector (13) is an annular structure with a hollow hole, or the first connector (13) includes a plurality of first connecting parts (131) arranged circumferentially along the first shell (11) and the second shell (12), and there is a preset distance between adjacent first connecting parts (131). The second connector (14) is an annular structure with a hollow hole, or the second connector (14) includes a plurality of second connecting parts arranged circumferentially along the shell to which it is connected, and there is a preset distance between adjacent second connecting parts.

18. An open-type audio device, characterized in that, Includes the sound-generating device according to any one of claims 1-17.

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