Sound production device

Abstract

The present invention provides a sound production device, comprising a housing provided with an accommodating cavity and a sound production unit accommodated in the accommodating cavity. The sound production unit comprises a basket, a vibration system fixed to the basket, a magnetic circuit system for driving the vibration system to vibrate and produce sound, and an elastic connector supporting the vibration system. The housing comprises an upper cover body and a lower cover body matching the upper cover body; the housing comprises a side wall provided with a sound outlet hole; a front cavity is formed between the upper cover body and the sound production unit; the vibration system comprises a vibrating diaphragm, a voice coil for driving the vibrating diaphragm to vibrate and produce sound, and a frame for supporting the vibrating diaphragm and the voice coil; the magnetic circuit system comprises a central magnetic steel assembly connected to the upper cover body; the frame is provided around the central magnetic steel assembly; an opening is provided on the side of the frame distant from the sound outlet hole. In the structure, partial opening design on the side of the frame distant from the sound outlet hole reduces the weight of the frame, and balances the asymmetry of the sound quality.

Description

A sound-generating device Technical Field

[0001] The present invention relates to the field of electroacoustic conversion, and in particular to a sound-generating device. Background Art

[0002] With the rapid development of mobile communication technology in recent years, consumers are increasingly using mobile communication devices with voice functions, such as mobile phones, handheld game consoles, laptops, multimedia players, and other devices capable of communicating via public or private communication networks. As the voice playback device, the internal vibration system of the sound-generating device is directly related to the improvement of the product's acoustic performance.

[0003] In the related art, the top of the central magnetic steel assembly of the sound-emitting device is bonded to the upper cover plate, blocking part of the front cavity space, thereby causing asymmetry in the sound quality between the sound hole side and the non-sound hole side, resulting in a large difference in amplitude between the sound hole side and the non-sound hole side.

[0004] Therefore, it is necessary to provide a new sound-generating device to solve the above problems. Technical issues

[0005] The object of the present invention is to provide a sound-generating device with balanced sound quality and small amplitude variation. Technical Solutions

[0006] The technical solution of the present invention is as follows: The present invention provides a sound-emitting device, comprising a shell having a receiving cavity and a sound-emitting unit accommodated in the receiving cavity, the sound-emitting unit comprising a basin, a vibration system fixed to the basin, a magnetic circuit system for driving the vibration system to vibrate and produce sound, and an elastic connecting member supporting the vibration system, the shell comprising an upper cover body and a lower cover body arranged in cooperation with the upper cover body, the shell comprising a side wall provided with a sound outlet, a front cavity being formed between the upper cover body and the sound-emitting unit, the vibration system comprising a diaphragm, a voice coil for driving the diaphragm to vibrate and produce sound, and a skeleton supporting the diaphragm and the voice coil, the magnetic circuit system comprising a central magnetic steel assembly connected to the upper cover body, the skeleton being arranged around the central magnetic steel assembly, and the skeleton being provided with an opening on a side away from the sound outlet.

[0007] Preferably, the skeleton includes a planar portion connected to the diaphragm, a first connecting portion extending from the inner edge of the planar portion and fixed to the voice coil, and a second connecting portion extending from the outer edge of the planar portion and fixed to the elastic connecting member, and the opening is arranged in the planar portion.

[0008] Preferably, the planar portion includes a pair of long sides arranged opposite to each other and a pair of short sides connecting the long sides, and the opening is a rounded rectangle arranged on the long sides.

[0009] Preferably, there is one opening, and the opening is symmetrically arranged with the perpendicular midline of the long side as the axis of symmetry.

[0010] Preferably, there are multiple openings, and the multiple openings are symmetrically arranged with the perpendicular midline of the long side as the symmetry axis.

[0011] Preferably, the central magnetic steel assembly includes a first main magnetic steel, a second main magnetic steel arranged above the first main magnetic steel, and a third main magnetic steel arranged above the second main magnetic steel. The magnetic circuit system also includes a secondary magnetic steel forming a magnetic gap with the central magnetic steel assembly, and the third main magnetic steel is connected to the upper cover.

[0012] Preferably, the magnetic circuit system further includes a magnetic yoke supporting the first main magnetic steel, the second main magnetic steel, the third main magnetic steel and the auxiliary magnetic steel, and the sound-generating device further includes a support portion connecting the magnetic yoke and the lower cover.

[0013] Preferably, the diaphragm includes a dome, an outer folding ring portion connected to one end of the dome, and an inner folding ring portion connected to the other end of the dome, the outer folding ring portion includes a first fixing portion connected to the basin frame, and the inner folding ring portion includes a second fixing portion connected to the second main magnet.

[0014] Preferably, the sound unit further includes a circuit board fixed to one end of the elastic connector and an electrical connector fixed to the other end of the elastic connector, and an external circuit supplies power to the voice coil through the circuit board, the elastic connector and the electrical connector. Beneficial effects

[0015] The benefit of the present invention is that: the present invention provides a sound-emitting device, whose skeleton is provided with an opening on the side away from the sound hole. Compared with the related art, the sound-emitting device of the present invention balances the asymmetry of the sound quality on the sound hole side and the non-sound hole side, reduces the maximum amplitude difference between the sound hole side and the non-sound hole side, and the low-frequency amplitude is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0017] FIG1 is a schematic diagram of the three-dimensional structure of a sound-generating device provided by an embodiment of the present invention;

[0018] FIG2 is an exploded view of the sound-generating device shown in FIG1 ;

[0019] FIG3 is a perspective view of the skeleton of the sound-generating device shown in FIG1 ;

[0020] FIG4 is a cross-sectional view of the sound generating device shown in FIG1 along line AA;

[0021] FIG5 is a cross-sectional view of the sound generating device shown in FIG1 along line BB. Modes for Carrying Out the Invention

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Please refer to Figures 1-5 at the same time. The present invention provides a sound-emitting device 100, which includes a shell 1 with a receiving cavity 10 and a sound-emitting unit 2 received in the receiving cavity 10. The sound-emitting unit 2 includes a basin 21, a vibration system 22 fixed to the basin 21, a magnetic circuit system 23 that drives the vibration system 22 to vibrate and produce sound, an elastic connector 3 supporting the vibration system 22, a circuit board 4 fixed to the elastic connector 3, a support part 5 supporting the magnetic circuit system 23, and an electrical connector 6. The magnetic circuit system 23 includes a central magnetic steel component 231 connected to the shell 1.

[0024] The shell 1 includes an upper cover 11 and a lower cover 12 arranged in cooperation with the upper cover 11. The shell 1 includes a side wall 14 provided with a sound outlet 13. The sound unit 2 and the upper cover 11 form a front cavity 15. The side wall 14 is composed of a part of the upper cover 11 and a part of the lower cover 12. In this embodiment, the upper cover 11 and the lower cover 12 are molded separately. In other embodiments, the upper cover 11 and the lower cover 12 can also be molded as an integral whole.

[0025] The vibration system 22 includes a diaphragm 221 , a voice coil 222 that drives the diaphragm 221 to vibrate and produce sound, and a skeleton 223 that supports the diaphragm 221 and the voice coil 222 . The skeleton 223 is disposed around the central magnetic steel component 231 .

[0026] The diaphragm 221 includes a dome 224, an outer folding ring portion 225 connected to one end of the dome 224, and an inner folding ring portion 226 connected to the other end of the dome 224. The dome 224 is connected to the skeleton 223, the outer folding ring portion 225 includes a first fixing portion 2251 connected to the basin frame 21, and the inner folding ring portion 226 includes a second fixing portion 2261 connected to the central magnetic steel assembly 231.

[0027] The voice coil 222 includes a voice coil lead 2220 , which is connected to the electrical connector 6 . The voice coil 222 is provided with a recessed portion 2221 on the outer side. This structure of a recess in the middle and convex sides can improve the distortion of the sound unit 2 .

[0028] The skeleton 223 includes a planar portion 227 connected to the dome 224, a first connecting portion 228 extending from the inner edge of the planar portion 227 and fixed to the voice coil 222, and a second connecting portion 229 extending from the outer edge of the planar portion 227 and fixed to the elastic connecting member 3. The planar portion 227 is provided with an opening 2231 on a side away from the sound outlet 13.

[0029] The planar portion 227 includes a pair of opposed long sides 2271 and a pair of short sides 2272 connecting the long sides 2271. The second connecting portion 229 is disposed on the short sides 2272. The opening 2231 is disposed on the long side 2271. The opening 2231 is symmetrically arranged about the perpendicular midline of the long side 2271 and has a rounded rectangular shape. In this embodiment, there is one opening 2231, which is a rounded rectangular shape. In other embodiments, there may be multiple openings 2231 or other shapes. Providing the opening 2231 on the planar portion 227 of the frame 223 on the side away from the sound outlet 13 can reduce the mass of the frame on the non-sound outlet side, balance the asymmetry of the sound quality, and reduce the difference in maximum amplitude between the sound outlet side and the non-sound outlet side.

[0030] The magnetic circuit system 23 includes a secondary magnet 232 arranged around the central magnet assembly 231, a secondary pole core 233 located above the secondary magnet 232, and a yoke 234 supporting the central magnet assembly 231 and the secondary magnet 232. The central magnet assembly 231 and the secondary magnet 232 form a magnetic gap 25, the secondary pole core 233 is fixed to the basin frame 21, and the yoke 234 is provided with an annular groove 2341 for avoiding the voice coil 222.

[0031] The central magnetic steel assembly 231 includes a first main magnetic steel 2311, a second main magnetic steel 2312 arranged above the first main magnetic steel 2311, a main pole core 2313 sandwiched between the first main magnetic steel 2311 and the second main magnetic steel 2312, a third main magnetic steel 2314 arranged above the second main magnetic steel 2312, and a magnetic conductive sheet 2315 sandwiched between the second main magnetic steel 2312 and the third main magnetic steel 2314, the second main magnetic steel 2312 includes a main body 23120 and an extension portion 23121 extending from the main body 23120 close to the upper cover body 11, the extension portion 23121 is fixed to the magnetic conductive sheet 2315, the upper surface of the main body 23120 is connected to the second fixing portion 2261, the second fixing portion 2261 is arranged around the main body 23120, and the third main magnetic steel 2314 is connected to the upper cover body 11.

[0032] The elastic connector 3 includes a metal connector 31 and an auxiliary diaphragm 32 located below the metal connector 31. The elastic connector 3 connects the basin frame 21 and the skeleton 223. One end of the metal connector 31 is fixed to the circuit board 4, and the other end is fixed to the electrical connector 6. The auxiliary diaphragm 32 is located below the metal connector 31.

[0033] The circuit board 4 is partially disposed in the receiving cavity 10 and partially extends outside the housing 1 . An external circuit supplies power to the voice coil 222 through the circuit board 4 , the metal connector 31 and the electrical connector 6 .

[0034] The support part 5 is arranged between the sound unit 2 and the lower cover 12, and includes a first support part 51 in the shape of a cylinder and a second support part 52 in the shape of a cuboid. The material of the support part 5 is foam. In this embodiment, there are two support parts 5 in the shape of a cylinder and a cuboid. In other embodiments, the support part 5 can be one or more, or can be in other shapes.

[0035] Compared with the related art, the present invention provides a sound-emitting device, comprising a shell having a receiving cavity and a sound-emitting unit accommodated in the receiving cavity, the sound-emitting unit comprising a basin, a vibration system fixed to the basin, a magnetic circuit system for driving the vibration system to vibrate and produce sound, and an elastic connecting member supporting the vibration system, the shell comprising an upper cover and a lower cover cooperated with the upper cover, the shell comprising a side wall provided with a sound outlet, a front cavity being formed between the upper cover and the sound-emitting unit, the vibration system comprising a diaphragm, a voice coil for driving the diaphragm to vibrate and produce sound, and a skeleton supporting the diaphragm and the voice coil, the magnetic circuit system comprising a central magnetic steel assembly connected to the upper cover, the skeleton being arranged around the central magnetic steel assembly, and the skeleton being provided with an opening on a side away from the sound outlet, the present invention performs a partial opening design on the skeleton on the side away from the sound outlet, thereby reducing the mass of the skeleton on this side, balancing the asymmetry of the sound quality, and reducing the amplitude difference between the sound outlet side and the non-sound outlet side.

[0036] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A sound-producing device, comprising a shell having a receiving cavity and a sound-producing unit received in the receiving cavity, the sound-producing unit comprising a basin, a vibration system fixed to the basin, a magnetic circuit system driving the vibration system to vibrate and produce sound, and an elastic connecting member supporting the vibration system, the shell comprising an upper cover and a lower cover cooperating with the upper cover, the shell comprising a side wall provided with a sound outlet, a front cavity being formed between the upper cover and the sound-producing unit, the vibration system comprising a diaphragm, a voice coil driving the diaphragm to vibrate and produce sound, and a skeleton supporting the diaphragm and the voice coil, characterized in that The magnetic circuit system includes a central magnetic steel component connected to the upper cover body, the frame is arranged around the central magnetic steel component, and the frame is provided with an opening on a side away from the sound outlet.

2. The sound-generating device according to claim 1, wherein: The skeleton includes a planar portion connected to the diaphragm, a first connection portion extending from an inner edge of the planar portion and fixed to the voice coil, and a second connection portion extending from an outer edge of the planar portion and fixed to the elastic connector, and the opening is provided in the planar portion.

3. The sound-generating device according to claim 2, characterized in that: The planar portion includes a pair of long sides arranged opposite to each other and a pair of short sides connecting the long sides, and the opening is a rounded rectangle arranged on the long sides.

4. The sound-generating device according to claim 3, characterized in that: There is one opening, and the opening is symmetrically arranged with the perpendicular midline of the long side as the axis of symmetry.

5. The sound-generating device according to claim 3, characterized in that: There are multiple openings, and the multiple openings are symmetrically arranged with the mid-perpendicular line of the long side as the symmetry axis.

6. The sound-generating device according to claim 1, wherein: The central magnetic steel assembly includes a first main magnetic steel, a second main magnetic steel arranged above the first main magnetic steel, and a third main magnetic steel arranged above the second main magnetic steel. The magnetic circuit system also includes a secondary magnetic steel forming a magnetic gap with the central magnetic steel assembly, and the third main magnetic steel is connected to the upper cover.

7. The sound-generating device according to claim 6, characterized in that: The magnetic circuit system also includes a magnetic yoke that supports the first main magnetic steel, the second main magnetic steel, the third main magnetic steel and the auxiliary magnetic steel, and the sound unit also includes a support portion connecting the magnetic yoke and the lower cover.

8. The sound-generating device according to claim 6, characterized in that: The diaphragm includes a dome, an outer folding ring portion connected to one end of the dome, and an inner folding ring portion connected to the other end of the dome, the outer folding ring portion includes a first fixing portion connected to the basin frame, and the inner folding ring portion includes a second fixing portion connected to the second main magnetic steel.

9. The sound-generating device according to claim 1, characterized in that: The sound-emitting unit further includes a circuit board fixed to one end of the elastic connector and an electrical connector fixed to the other end of the elastic connector. An external circuit supplies power to the voice coil through the circuit board, the elastic connector and the electrical connector.

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