Loudspeaker

Abstract

The present invention provides a loudspeaker, comprising a housing having an accommodating space, and a sound production unit that divides the accommodating space into a front cavity and a rear cavity. The housing is provided with a sound outlet used for placing the front cavity in communication with the outside, and the sound production unit comprises a vibration system and a magnetic circuit system. The vibration system comprises a diaphragm, the magnetic circuit system comprises a central magnetic circuit and a side magnetic circuit, the diaphragm comprises a rubber membrane and a spherical top portion fixed to the rubber membrane, and the rubber membrane comprises an inner folding ring, an outer folding ring, and a rubber membrane main body connected to the inner folding ring and the outer folding ring and covering the spherical top portion. The inner folding ring comprises an inner fixed portion fixed to the central magnetic circuit, and the loudspeaker further comprises a bonding member bonded to the inner fixed portion and the housing. The spherical top portion comprises a first side edge close to the sound outlet and a second side edge distant from the sound outlet, and the rubber membrane main body at the second side edge is provided with a notch portion formed by removing at least some rubber, and used for balancing the amplitudes of the first side edge and the second side edge. The loudspeaker provided by the present invention can reduce an amplitude discrepancy, improving the acoustic stability of the product.

Description

speaker Technical Field

[0001] The present invention relates to the field of acoustic and electrical technology, and in particular to a loudspeaker. Background Art

[0002] With the development of science and technology, portable electronic products such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices are widely used in people's daily lives. In these mobile electronic devices, voice playback devices are indispensable components. The quality of voice directly affects the user experience when using these mobile electronic devices. Therefore, the requirements for the speakers used in them are getting higher and higher.

[0003] The speaker of the related technology includes a shell with a accommodating space and a sound-emitting unit that divides the accommodating space into a front cavity and a rear cavity. A sound outlet connected to the front cavity is provided on one side of the shell. When the vibration system vibrates and makes sound, the gas flow rate on the side away from the sound outlet and the side close to the sound outlet is greatly different, which can easily cause a large difference in the amplitude of the diaphragms on both sides, resulting in performance problems such as vibration imbalance and sound distortion.

[0004] Therefore, it is necessary to provide a product that solves the above problems. Technical issues

[0005] The object of the present invention is to provide a loudspeaker to reduce the maximum amplitude difference and improve the acoustic stability of the loudspeaker without affecting the low-frequency amplitude. Technical Solutions

[0006] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a loudspeaker, comprising a shell having a accommodating space and a sound-emitting unit accommodated in the accommodating space and dividing the accommodating space into a front cavity and a rear cavity, the shell comprising an upper shell and a lower shell covering the upper shell, the upper shell being provided with a sound outlet for connecting the front cavity and the outside, the sound-emitting unit comprising a basin and a vibration system and a magnetic circuit system fixed to the basin, the vibration system comprising a diaphragm fixed to the basin and a voice coil driving the diaphragm to vibrate and produce sound, the diaphragm comprising a rubber membrane and a spherical top portion fixed to the rubber membrane, the rubber membrane comprising an inner folding ring, an outer folding ring arranged on the outside of the inner folding ring, and a ring connecting the inner folding ring. The speaker further comprises a rubber membrane body which is connected to the ring and the outer folding ring and covers the top of the ball. The magnetic circuit system comprises a lower clamping plate, a central magnetic circuit fixed to the lower clamping plate, and a side magnetic circuit arranged around the central magnetic circuit to form a magnetic gap. The inner folding ring comprises an inner fixing portion fixed to the central magnetic circuit. The speaker further comprises an adhesive for bonding the inner fixing portion and the upper shell. The top of the ball comprises a first side edge close to the sound outlet and a second side edge away from the sound outlet. The first side edge and the second side edge are respectively located on opposite sides of the adhesive. The rubber membrane body at the second side edge is provided with a notch portion formed by removing at least part of the rubber for balancing the amplitude of the first side edge and the second side edge.

[0007] Preferably, the central magnetic circuit includes a first central magnet, a central pole core, a second central magnet and a third central magnet stacked in sequence from the lower clamping plate, and the internal fixed portion has a cover-like structure, and has a top wall, a side wall extending from the top wall toward the lower clamping plate, and a bottom wall bent and extended from the side wall and fixed on the top surface of the second central magnet, the top wall is attached to the top surface of the third central magnet, and the side wall is attached to the side surface of the third central magnet.

[0008] Preferably, the vibration system further includes a skeleton fixedly connecting the voice coil and the diaphragm, the skeleton including a flat plate portion, a first extension portion extending from the outer edge of the flat plate portion and bending toward the lower clamping plate, and a second extension portion extending from the inner edge of the flat plate portion and bending toward the lower clamping plate, the second extension portion including a first portion parallel to the vibration direction of the diaphragm and a second portion perpendicular to the first portion, the voice coil is fixed to the second portion and inserted into the magnetic gap, the flat plate portion serves as the top portion of the ball, and the rubber membrane body covers the flat plate portion.

[0009] Preferably, the vibration system further includes a flexible support member spaced apart from the diaphragm and an auxiliary diaphragm fixed to a side of the flexible support member away from the diaphragm, wherein the flexible support member is fixed between the basin and the first extension portion.

[0010] Preferably, the outer periphery of the outer folding ring is fixed to the basin frame, and the basin frame, the rubber membrane and the skeleton are integrally formed.

[0011] Preferably, the lower clamping plate is provided with an avoidance groove for avoiding the voice coil, and the side magnetic circuit includes a side magnetic steel fixed to the lower clamping plate and a side pole core attached to the side magnetic steel, and the side pole core is fixed to the basin frame.

[0012] Preferably, the speaker also includes a fixing component for fixing and supporting the sound unit, and the fixing component includes a first fixing component and a second fixing component clamped between the lower shell and the sound unit, and the first fixing component and the second fixing component have different thicknesses in the direction from the upper shell to the lower shell.

[0013] Preferably, the notch is formed by laser clearing.

[0014] Preferably, the lower shell is further provided with a leakage hole connecting the rear cavity with the outside.

[0015] Preferably, the second central magnetic steel and the third central magnetic steel are an integral magnetic steel. Beneficial effects

[0016] The novel loudspeaker of the present invention comprises a shell having a storage space and a sound-emitting unit accommodated in the storage space and dividing the storage space into a front cavity and a rear cavity. The shell comprises an upper shell and a lower shell covering the upper shell. The upper shell is provided with a sound outlet for connecting the front cavity and the outside world. The sound-emitting unit comprises a basin and a vibration system and a magnetic circuit system fixed to the basin. The vibration system comprises a diaphragm fixed to the basin and a voice coil driving the diaphragm to vibrate and produce sound. The diaphragm comprises a rubber membrane and a spherical top portion fixed to the rubber membrane. The rubber membrane comprises an inner fold ring, an outer fold ring arranged outside the inner fold ring, and a connecting member connecting the inner fold ring and the outer fold ring. The rubber membrane body covers the top of the ball, the magnetic circuit system includes a lower clamping plate, a central magnetic circuit fixed to the lower clamping plate, and a side magnetic circuit arranged around the central magnetic circuit to form a magnetic gap. The inner fold includes an inner fixing portion fixed to the central magnetic circuit. The speaker also includes an adhesive bonding the inner fixing portion to the upper shell. The top of the ball includes a first side edge proximal to the sound outlet and a second side edge distal to the sound outlet, the first side edge and the second side edge being located on opposite sides of the adhesive. The rubber membrane body at the second side edge is provided with a notch portion formed by removing at least a portion of the rubber to balance the amplitude of the first side edge and the second side edge. In the above structure, by partially removing the rubber membrane body covering the side of the top of the ball distal to the sound outlet, the mass of the sound-emitting unit on the side distal to the sound outlet is reduced, thereby balancing the acoustic resistance on the sound outlet side and the side not to the sound outlet, reducing the difference in maximum amplitude, and improving the acoustic stability of the product, while not affecting the low-frequency amplitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 in the art can also derive other drawings based on these drawings without inventive work. Among them:

[0018] FIG1 is a perspective view of a loudspeaker according to the present invention;

[0019] FIG2 is an exploded view of the speaker of the present invention;

[0020] FIG3 is a sectional perspective view of the speaker of the present invention taken along line AA in FIG1 ;

[0021] FIG4 is a partial enlarged view of portion C in FIG3 ;

[0022] FIG5 is a perspective view of a rubber membrane in a loudspeaker according to the present invention;

[0023] FIG6 is a cross-sectional view of the speaker of the present invention along line BB in FIG1 .

[0024] Reference numerals:

[0025] 1000, loudspeaker;

[0026] 1. Housing; 10. Accommodation space; 101. Front cavity; 102. Rear cavity; 11. Upper housing; 11a. Sound outlet; 12. Lower housing; 12a. Leakage hole;

[0027] 2. Sound unit; 21. Basin frame; 22. Vibration system; 23. Magnetic circuit system; 231. Lower clamping plate; 2311. Avoidance groove; 232. Center magnetic circuit; 2321. First center magnet; 2322. Center pole core; 2323. Second center magnet; 2324. Third center magnet; 233. Magnetic gap; 234. Side magnetic circuit; 2341. Side magnet; 2342. Side pole core;

[0028] 3. Diaphragm; 31. Rubber membrane; 311. Inner fold; 3111. Inner fixing portion; 3111a. Top wall; 3111b. Side wall; 3111c. Bottom wall; 312. Outer fold; 313. Rubber membrane body; 3131. Notch; 32. Dome; 321. First side; 322. Second side.

[0029] 4. Voice coil;

[0030] 5. Adhesive parts;

[0031] 6. Frame; 61. Flat plate; 62. First extension; 63. Second extension; 631. First portion; 632. Second portion;

[0032] 7. Flexible support; 8. Auxiliary diaphragm;

[0033] 9. Fixing component; 91. First fixing component; 92. Second fixing component. Modes for Carrying Out the Invention

[0034] 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 the field of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0035] As shown in Figures 1-6, the present invention provides a speaker 1000, including a shell 1 with a receiving space 10 and a sound unit 2 accommodated in the receiving space 10, and the sound unit 2 divides the receiving space 10 into a front cavity 101 and a rear cavity 102.

[0036] As shown in Figure 1-2, the shell 1 includes an upper shell 11 and a lower shell 12 covering the upper shell 11. The upper shell 11 is provided with a sound outlet 11a for conducting the sound generated by the sound unit 2 to the outside of the speaker. The lower shell 12 is provided with a leakage hole 12a connecting the rear cavity 102 and the outside world. The opening of the leakage hole 12a can prevent the diaphragm 3 from having a tympanic membrane or a deflated membrane phenomenon, which affects the acoustic performance of the product.

[0037] The sound unit 2 includes a frame 21 and a vibration system 22 and a magnetic circuit system 23 fixed to the frame 21 .

[0038] The vibration system 22 includes a diaphragm 3 fixed to the basin frame 21 and a voice coil 4 that drives the diaphragm 3 to vibrate and produce sound. The diaphragm 3 includes a rubber membrane 31 and a dome 32 fixed to the rubber membrane 31. The rubber membrane 31 includes an inner fold 311, an outer fold 312 arranged outside the inner fold 311, and a rubber membrane body 313 connecting the inner fold 311 and the outer fold 312 and covering the dome 32. The magnetic circuit system 23 includes a lower clamping plate 231, a central magnetic circuit 232 fixed to the lower clamping plate 231, and a side magnetic circuit 234 arranged around the central magnetic circuit 232 to form a magnetic gap 233. The inner folding ring 311 includes an inner fixing portion 3111 fixed to the central magnetic circuit 232. The loudspeaker also includes an adhesive member 5 for bonding the inner fixing portion 3111 and the upper shell 11. The spherical top portion 32 includes a first side 321 close to the sound outlet 11a and a second side 322 away from the sound outlet 11a. The first side 321 and the second side 322 are respectively located on opposite sides of the adhesive member 5. The rubber membrane body 313 at the second side 322 is provided with a notch portion 3131 formed by removing at least part of the rubber for balancing the amplitude of the first side 321 and the second side 322.

[0039] It should be noted that the thickness of the rubber membrane 31 and the shape and size of the notch 3131 can be adjusted accordingly according to actual conditions. The shape of the notch 3131 is not limited here. In addition, in this embodiment, the notch 3131 is formed by laser clearing and other methods. The advantage of this method is that the notch can be dynamically opened according to the position of the sound outlet, thereby improving the matching degree of the sound-emitting unit to the shell with different sound outlet positions.

[0040] Specifically, as shown in Figures 2-3, the vibration system 22 includes a diaphragm 3 fixed to the basin frame 21, a voice coil 4 that drives the diaphragm 3 to vibrate and produce sound, and a skeleton 6 connecting the diaphragm 3 and the voice coil 4. The diaphragm 3 includes a rubber membrane 31 and a spherical top 32 fixed to the rubber membrane 31, wherein the rubber membrane 31 includes an inner fold ring 311, an outer fold ring 312 arranged on the outside of the inner fold ring 311, and a rubber membrane body 313 connecting the inner fold ring 311 and the outer fold ring 312 and covering the spherical top 32. The outer periphery of the outer fold ring 312 is fixed to the basin frame 21, and the basin frame 21, the rubber membrane 31 and the skeleton 6 are formed as one piece.

[0041] As shown in Figures 2 and 4, the skeleton 6 includes a flat portion 61, a first extension portion 62 bent and extended from the outer edge of the flat portion 61 toward the lower clamping plate 231, and a second extension portion 63 bent and extended from the inner edge of the flat portion 61 toward the lower clamping plate 231. The second extension portion 63 includes a first portion 631 parallel to the vibration direction of the diaphragm 3 and a second portion 632 perpendicular to the first portion 631. The voice coil 4 is fixed to the second portion 632 and inserted into the magnetic gap 233. The flat portion 61 serves as the dome portion 32, and the rubber membrane body 313 covers the flat portion 61.

[0042] Specifically, as shown in Figure 6, the vibration system 22 also includes a flexible support member 7 spaced apart from the diaphragm 3 and an auxiliary diaphragm 8 fixed to the side of the flexible support member 7 away from the diaphragm 3. The flexible support member 7 is fixed between the basin frame 21 and the first extension portion 62. The setting of the auxiliary diaphragm 8 can improve the low-frequency performance of the product.

[0043] Specifically, as shown in FIG2 , the magnetic circuit system 23 includes a lower clamping plate 231, a central magnetic circuit 232 fixed to the lower clamping plate 231, and a side magnetic circuit 234 arranged around the central magnetic circuit 232 to form a magnetic gap 233. The lower clamping plate 231 is provided with a bypass groove 2311 for avoiding the voice coil 4. The central magnetic circuit 232 includes a first central magnetic steel 2321, a central pole core 2322, a second central magnetic steel 2323, and a third central magnetic steel 2324 stacked in sequence from the lower clamping plate 231. It should be noted that the second central magnetic steel 2323 and the third central magnetic steel 23 24 can be a split magnet or an integrated magnet. In this embodiment, the second center magnet 2323 and the third center magnet 2324 are an integrated magnet; the side magnetic circuit 234 includes a side magnet 2341 fixed to the lower clamping plate 231 and a side pole core 2342 attached to the side magnet 2341. The side pole core 2342 is fixed to the basin frame 21, and the voice coil 4 is fixed to the second part 632 of the skeleton 6 and inserted into the magnetic gap 233; and the voice coil 4 is electrically connected to the flexible support member 7. After power is turned on, the voice coil 4 interacts with the magnetic circuit system 23 to drive the diaphragm 3 to vibrate and make sound.

[0044] Specifically, as shown in Figure 4, the internal fixed portion 3111 has a cover-like structure, and has a top wall 3111a, a side wall 3111b extending from the top wall 3111a toward the lower clamping plate 231, and a bottom wall 3111c bent and extended from the side wall 3111b and fixed on the top surface of the second center magnet 2323. The top wall 3111a is attached to the top surface of the third center magnet 2324, and the side wall 3111b is attached to the side surface of the third center magnet 2324.

[0045] The loudspeaker 1000 also includes a fixing component 9 for fixing and supporting the sound unit 2. The fixing component 9 includes a first fixing component 91 and a second fixing component 92 clamped between the lower shell 12 and the sound unit 2. The setting of the fixing component 9 can not only clamp and fix the sound unit 2, but also ensure the stability of the sound unit 2 when the loudspeaker falls to prevent noise; it can also increase the volume of the rear cavity 102 and improve the acoustic performance; it should be noted that the first fixing component 91 and the second fixing component 92 have different thicknesses in the direction from the upper shell 11 to the lower shell 12, so as to adapt to speaker shells of different shapes and sizes. In this embodiment, the thickness of the first fixing component 91 is greater than that of the second fixing component 92.

[0046] Compared with the related art, the present invention provides a notch portion 3131 formed by removing at least part of the rubber on the rubber membrane body 313 at the second side 322 away from the sound outlet 11a for balancing the amplitude of the first side 321 and the second side 322, thereby balancing the acoustic resistance on the sound outlet side and the non-sound outlet side, reducing the difference in maximum amplitude, improving the acoustic stability of the product, and keeping the low-frequency amplitude unaffected.

[0047] The above description is merely an embodiment of the present invention. It should be pointed out that a person skilled in the art in the field of the present invention may make improvements without departing from the inventive concept of the present invention, but these improvements shall all fall within the scope of protection of the present invention.

Claims

1. A loudspeaker, comprising a housing having a storage space and a sound-emitting unit housed in the storage space and dividing the storage space into a front cavity and a rear cavity, the housing comprising an upper shell and a lower shell covering the upper shell, the upper shell being provided with a sound outlet for connecting the front cavity with the outside world, the sound-emitting unit comprising a basin and a vibration system and a magnetic circuit system fixed to the basin, the vibration system comprising a diaphragm fixed to the basin and a voice coil driving the diaphragm to vibrate and produce sound, the diaphragm comprising a rubber membrane and a dome fixed to the rubber membrane, the rubber membrane comprising an inner folding ring, a magnetic circuit provided on the inner folding ring, An outer folding ring on the outside of the ring and a rubber membrane body connecting the inner folding ring and the outer folding ring and covering the top of the ball, the magnetic circuit system includes a lower clamping plate, a central magnetic circuit fixed to the lower clamping plate, and a side magnetic circuit arranged around the central magnetic circuit to form a magnetic gap, the inner folding ring includes an inner fixing part fixed to the central magnetic circuit, the loudspeaker also includes an adhesive bonding the inner fixing part and the upper shell, the top of the ball includes a first side close to the sound outlet and a second side away from the sound outlet, the first side and the second side are respectively located on opposite sides of the adhesive, and it is characterized in that The rubber membrane body at the second side is provided with a notch portion formed by removing at least a portion of the rubber for balancing the amplitudes of the first side and the second side.

2. The loudspeaker according to claim 1, wherein: The central magnetic circuit includes a first central magnet, a central pole core, a second central magnet and a third central magnet stacked in sequence from the lower clamping plate. The internal fixed portion has a cover-like structure, and has a top wall, a side wall extending from the top wall toward the lower clamping plate, and a bottom wall bent and extended from the side wall and fixed on the top surface of the second central magnet. The top wall is attached to the top surface of the third central magnet, and the side wall is attached to the side surface of the third central magnet.

3. The loudspeaker according to claim 1, wherein: The vibration system also includes a frame fixedly connecting the voice coil and the diaphragm, the frame including a flat portion, a first extension portion extending from the outer edge of the flat portion and bending toward the lower clamping plate, and a second extension portion extending from the inner edge of the flat portion and bending toward the lower clamping plate, the second extension portion including a first portion parallel to the vibration direction of the diaphragm and a second portion perpendicular to the first portion, the voice coil is fixed to the second portion and inserted into the magnetic gap, the flat portion serves as the top of the ball, and the rubber membrane body covers the flat portion.

4. The loudspeaker according to claim 3, wherein: The vibration system further includes a flexible support member spaced apart from the diaphragm and an auxiliary diaphragm fixed to a side of the flexible support member away from the diaphragm, wherein the flexible support member is fixed between the basin and the first extension portion.

5. The loudspeaker according to claim 3, wherein: The outer periphery of the outer folding ring is fixed to the basin frame, and the basin frame, the rubber membrane and the frame are integrally formed.

6. The loudspeaker according to claim 1, wherein: The lower clamping plate is provided with an avoidance groove for avoiding the voice coil. The side magnetic circuit includes a side magnetic steel fixed to the lower clamping plate and a side pole core attached to the side magnetic steel. The side pole core is fixed to the basin frame.

7. The loudspeaker according to claim 1, wherein: The speaker also includes a fixing component for fixing and supporting the sound unit, and the fixing component includes a first fixing component and a second fixing component clamped between the lower shell and the sound unit, and the first fixing component and the second fixing component have different thicknesses in the direction from the upper shell to the lower shell.

8. The loudspeaker according to claim 1, wherein: The notch is formed by laser clearing.

9. The loudspeaker according to claim 1, wherein: The lower shell is further provided with a leakage hole communicating with the rear cavity and the outside.

10. The loudspeaker according to claim 2, wherein: The second central magnetic steel and the third central magnetic steel are an integrated magnetic steel.

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