Loudspeaker

Abstract

The loudspeaker provided by the invention comprises a basin stand with an accommodating space, a vibration system accommodated in the basin stand and a magnetic circuit system for driving the vibration system to vibrate, the magnetic circuit system comprises a magnet yoke fixed on the basin stand, main magnetic steel fixed on the magnet yoke, auxiliary magnetic steel arranged at an interval with the main magnetic steel and an upper clamping plate fixed on the auxiliary magnetic steel, the auxiliary magnetic steel comprises a first side surface close to the main magnetic steel, a second side surface opposite to the first side surface, an upper surface close to the upper clamping plate and a lower surface close to the magnet yoke. The auxiliary magnetic steel provided by the invention is also provided with a groove communicated with the magnetic gap, the groove is recessed from the lower surface along the direction far away from the magnet yoke and penetrates through the first side surface and the second side surface, and / or the groove is recessed from the upper surface along the direction far away from the upper clamping plate and penetrates through the first side surface and the second side surface. And the groove is used for discharging air below the voice coil when the vibration system vibrates, so that the acoustic performance of the loudspeaker is improved.

Description

Technical Field

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

[0002] With the recent advancement of technology, especially the rapid progress in mobile communications, more and more mobile electronic devices have become part of our daily lives. Smartphones, tablets, laptops, and multi-function media players have become indispensable. Voice playback is an essential component within these mobile devices, and voice quality directly impacts the user experience.

[0003] As a voice playback device, the structural design of existing speakers directly affects the quality of voice playback. These speakers include a magnetic circuit system and a vibration system. However, the secondary magnet in the magnetic circuit system is glued to the upper clamping plate and yoke. This forces the vibration system to expel air from under the voice coil only from the upper clamping plate near the diaphragm during vibration. This prevents the air from being discharged promptly or effectively, thereby reducing the speaker's acoustic performance. Summary of the Invention

[0004] The present invention provides a loudspeaker, which includes a basin with a receiving space, a vibration system received in the basin and a magnetic circuit system for driving the vibration system to vibrate, the vibration system including a diaphragm fixed to the basin and a voice coil for driving the diaphragm to vibrate and produce sound, the magnetic circuit system including a yoke fixed to the basin, a main magnet fixed to the yoke, a secondary magnet spaced apart from the main magnet to form a magnetic gap, and an upper clamping plate fixed to the secondary magnet, the secondary magnet including a first side surface opposite to the main magnet, a second side surface opposite to the first side surface, an upper surface close to the upper clamping plate, and a lower surface close to the yoke; the secondary magnet is also provided with a groove connected to the magnetic gap, the groove is recessed from the lower surface in a direction away from the yoke and passes through the first side surface and the second side surface, and / or the groove is recessed from the upper surface in a direction away from the upper clamping plate and passes through the first side surface and the second side surface.

[0005] Preferably, the secondary magnetic steel is an annular rectangle, and includes two relatively spaced long axis portions and two relatively spaced short axis portions, and a connecting portion connecting adjacent long axis portions and short axis portions.

[0006] Preferably, the groove is located in one of the major axis portion, the minor axis portion and the connecting portion.

[0007] Preferably, the second side surface of the long axis portion away from the main magnetic steel is flush with the magnetic yoke.

[0008] Preferably, the groove comprises a plurality of grooves, and the plurality of grooves are provided in at least one of the major axis portion, the minor axis portion and the connecting portion.

[0009] Preferably, the groove is rectangular.

[0010] Preferably, the yoke includes a bottom for fixing the main magnet and the secondary magnet and a side portion extending from the bottom close to both sides of the secondary magnet and bent toward the basin frame, the side portion includes a leakage hole connected to the receiving space, and the speaker also includes a mesh covering the leakage hole.

[0011] Preferably, the speaker further includes an inner cavity surrounded by the mesh cloth and the secondary magnet, and the groove connects the inner cavity and the magnetic gap.

[0012] Compared with the prior art, the auxiliary magnet of the magnetic circuit system in the speaker provided by the present invention includes a groove that is recessed from the lower surface close to the yoke in a direction away from the yoke and passes through the first side surface close to the main magnet and the second side surface spaced apart from the first side surface; or, the auxiliary magnet includes a groove that is recessed from the upper surface close to the upper clamping plate in a direction away from the upper clamping plate and passes through the first side surface and the second side surface; the groove is used to connect the magnetic gap and the air outside the auxiliary magnet, thereby effectively discharging the air under the voice coil when the vibration system vibrates, thereby improving the acoustic performance of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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: Figure 1 Schematic diagram of the three-dimensional structure of the loudspeaker in the first embodiment of the present invention; Figure 2 for Figure 1 Exploded view of the speaker in ; Figure 3 for Figure 1 Schematic diagram of the auxiliary magnetic steel structure in the speaker; Figure 4 For the Figure 1 Cross-sectional view along line AA; Figure 5 for Figure 4 The enlarged structural diagram of part C in the middle; Figure 6 For the Figure 1 Cross-sectional view along the midline BB; Figure 7 Schematic diagram of the three-dimensional structure of the loudspeaker in the second embodiment of the present invention; Figure 8 For the Figure 7 Cross-sectional view along the mid-DD line; Figure 9 For the Figure 7 Cross-sectional view along line EE; Figure 10 Schematic diagram of the three-dimensional structure of the loudspeaker in the third embodiment of the present invention; Figure 11 For the Figure 10 Cross-sectional view along the midline FF; Figure 12 For the Figure 10 Cross-sectional view along the mid-GG line; Figure 13 For the Figure 1 Cross-sectional view along the HH line.

[0014] In the figure, 100, speaker, 10, basin frame, 20, vibration system, 21, diaphragm, 22, voice coil, 30, magnetic circuit system, 301, magnetic gap, 31, yoke, 311, leakage hole, 312, bottom, 313, side, 32, main magnet, 33, secondary magnet, 331, first side surface, 332, second side surface, 333, upper surface, 334, lower surface, 335, groove, 336, long axis portion, 337, short axis portion, 338, connecting portion, 34, upper splint, 40, FPC board, 50, mesh, 60, inner cavity. DETAILED DESCRIPTION

[0015] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the present disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, one of ordinary skill in the art will understand other possible embodiments and the advantages of the present invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] See Figure 1 、 Figure 2 and Figure 4An embodiment of the present invention provides a speaker 100, which includes a frame 10 having a housing, a vibration system 20 housed within the frame 10, a magnetic circuit system 30 for driving the vibration system 20, and an FPC board 40 for electrically connecting the speaker 100 to an external circuit. The magnetic circuit system 30 and the vibration system 20 are fixed to the frame 10, which supports the magnetic circuit system 30 and the vibration system 20. In this embodiment, the frame 10 is rectangular.

[0018] See Figure 4 The vibration system 20 includes a diaphragm 21 fixed to the frame 10 and a voice coil 22 that drives the diaphragm 21 to vibrate and produce sound. An electrical signal is introduced to the voice coil 22 via the FPC board 40. When the speaker 100 is powered on, the voice coil 22 vibrates under the action of the magnetic circuit system 30, thereby driving the diaphragm 21 to vibrate and produce sound.

[0019] See Figure 4 The magnetic circuit system 30 includes a yoke 31 spaced apart from the frame 10, a main magnet 32 ​​and a secondary magnet 33 fixed to the yoke 31 near the vibration system 20, and an upper clamping plate 34 fixed to the secondary magnet 33. The secondary magnet 33 surrounds the main magnet 32. The secondary magnet 33 and the main magnet 32 ​​together form a magnetic gap 301, and the voice coil 22 is suspended in the magnetic gap 301.

[0020] See Figures 3 to 6 The secondary magnet 33 includes a first side surface 331 proximate to the main magnet 32, a second side surface 332 opposite the first side surface 331, an upper surface 333 proximate to the upper clamping plate 34, and a lower surface 334 of the yoke 31. In the prior art, the secondary magnet 33 is secured to the yoke 31 and the upper clamping plate 34 using glue. However, when the vibration system 20 vibrates, the glue seal between the secondary magnet 33, the yoke 31, and the upper clamping plate 34 prevents the air beneath the voice coil 22 from being effectively vented, thereby reducing the acoustic performance of the loudspeaker 100. Therefore, in the first embodiment of the present invention, the secondary magnet 33 further includes a groove 335 that is recessed from the lower surface 334 away from the yoke 31 and extends through the first side surface 331 and the second side surface 332. The groove 335 connects the magnetic gap 301 with the air outside the secondary magnet 33, thereby venting the air beneath the voice coil 22 when the vibration system 20 vibrates, thereby improving the acoustic performance of the loudspeaker 100.

[0021] In addition to the groove 335 formed on the lower surface 334 of the secondary magnet 33, a groove 335 can also be formed on the upper surface 333 of the secondary magnet 33 to discharge the air under the voice coil 22 when the vibration system 20 vibrates. Figures 7 to 9The secondary magnetic steel 33 further includes a groove 335 that is recessed from the upper surface 333 in a direction away from the upper clamping plate 34 and passes through the first side surface 331 and the second side surface 332. Combining the technical solutions of the first embodiment and the second embodiment, the present invention provides a speaker 300 in the third embodiment, see Figures 10 to 12 The secondary magnet 33 further includes a groove 335 that extends from the lower surface 334 away from the yoke 31 and through the first and second side surfaces 331 and 332, and a groove 335 that extends from the upper surface 333 away from the upper clamping plate 34 and through the first and second side surfaces 331 and 332. Therefore, in specific embodiments, the grooves 335 can be selectively provided on the upper surface 333, the lower surface 334, or both the upper and lower surfaces 333 and 334 of the secondary magnet 33, depending on the product design and performance requirements. This increases product design flexibility.

[0022] See Figure 3 and Figure 13 In this embodiment, the secondary magnet 33 is in the shape of an annular rectangle. The annular rectangular secondary magnet 33 is not only conducive to increasing the volume of the magnetic circuit system 30, but also more conducive to freely opening the groove 335 on the secondary magnet 33. In other embodiments, the secondary magnet 33 may also be non-annular. The annular secondary magnet 33 includes two relatively spaced long axis portions 336 and two relatively spaced short axis portions 337, and a connecting portion 338 connecting adjacent long axis portions 336 and short axis portions 337. The position relationship of the groove 335 on the secondary magnet 33 can be located on the long axis portion 336, the short axis portion 337 or the connecting portion 338. The number of grooves 335 includes multiple grooves 335, and multiple grooves 335 are provided in at least one of the long axis portion 336, the short axis portion 337 and the connecting portion 338. The number of grooves 335 can be determined according to the actual performance requirements of the speaker during specific implementation. In this embodiment, the long axis portion 336 is away from the second side surface 332 of the main magnet 32 ​​and is flush with the yoke 31. The groove 335 can be rectangular or in other shapes, and the specific shape of the groove 335 is not limited here.

[0023] See Figure 2 and Figure 4 Speaker 100 also includes a mesh 50 fixed between yoke 31 and frame 10. This mesh 50 prevents the sound-absorbing material filling the rear cavity of the speaker box from entering the interior of the speaker unit. Speaker 100 also includes an inner cavity 60 enclosed by mesh 50 and secondary magnet 33. A groove 335 connects inner cavity 60 to magnetic gap 301.

[0024] Compared with the prior art, the speaker 100 provided by the present invention has a groove 335 on the surface of the secondary magnet 33 in the magnetic circuit system 30, which connects the magnetic gap 301 and the air outside the secondary magnet 33, and is used to discharge the air under the voice coil 22 when the vibration system 20 vibrates, thereby improving the acoustic performance of the speaker 100.

[0025] 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 loudspeaker comprising a frame having a receiving space, a vibration system received in the frame, and a magnetic circuit system for driving the vibration system to vibrate, the vibration system comprising a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate and produce sound, the magnetic circuit system comprising a yoke fixed to the frame, a main magnet fixed to the yoke, a secondary magnet spaced apart from the main magnet to form a magnetic gap, and an upper clamping plate fixed to the secondary magnet, the secondary magnet comprising a first side surface opposite to the main magnet, a second side surface opposite to the first side surface, an upper surface close to the upper clamping plate, and a lower surface close to the yoke; characterized in that The auxiliary magnet is also provided with a groove connected to the magnetic gap, the groove is recessed from the lower surface in a direction away from the magnetic yoke and passes through the first side surface and the second side surface, and / or, the groove is recessed from the upper surface in a direction away from the upper clamping plate and passes through the first side surface and the second side surface.

2. The loudspeaker according to claim 1, wherein: The secondary magnetic steel is an annular rectangle and includes two relatively spaced long axis portions, two relatively spaced short axis portions, and a connecting portion connecting adjacent long axis portions and short axis portions.

3. The speaker according to claim 2, characterized in that The groove is located at one of the major axis portion, the minor axis portion, and the connecting portion.

4. The speaker according to claim 2, characterized in that The second side surface of the long axis portion away from the main magnetic steel is flush with the yoke.

5. The loudspeaker according to claim 2, characterized in that: The grooves include a plurality of grooves, and the plurality of grooves are provided in at least one of the long axis portion, the short axis portion, and the connecting portion.

6. The loudspeaker according to claim 1, characterized in that The groove is rectangular.

7. The loudspeaker according to claim 1, characterized in that: The yoke includes a bottom for fixing the main magnet and the secondary magnet and a side portion extending from the bottom close to both sides of the secondary magnet and bent toward the basin frame, the side portion includes a leakage hole connected to the receiving space, and the speaker also includes a mesh covering the leakage hole.

8. The loudspeaker according to claim 7, characterized in that: The speaker also includes an inner cavity surrounded by the mesh and the secondary magnetic steel, and the groove connects the inner cavity and the magnetic gap.

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