loudspeaker

Abstract

The loudspeaker provided by the application comprises a frame with a receiving space, a vibration system received in the frame, and a magnetic circuit system for driving the vibration system to vibrate, the magnetic circuit system comprises a yoke fixed to the frame, a main magnetic steel fixed to the yoke, a secondary magnetic steel arranged in space with the main magnetic steel, and an upper clamp plate fixed to the secondary magnetic steel, the secondary magnetic steel comprises a first side surface close to the main magnetic steel, a second side surface arranged opposite to the first side surface, an upper surface close to the upper clamp plate, and a lower surface close to the yoke. The secondary magnetic steel provided by the application is further provided with a groove in communication with a magnetic gap, the groove is recessed from the lower surface in a direction away from the yoke and penetrates 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 clamp plate and penetrates the first side surface and the second side surface, the groove is used for discharging air under a voice coil when the vibration system vibrates, thereby improving the acoustic performance of the loudspeaker.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic conversion, and more particularly to a loudspeaker. Background Technology

[0002] In recent years, with the development of technology, especially the rapid advancement of mobile communication technology, more and more mobile electronic devices have appeared in people's daily lives. Smartphones, tablets, laptops, and multi-functional media players have become indispensable household items. Among these mobile electronic devices, the voice playback device is an essential internal component, and the quality of the voice directly affects the user experience when using these devices.

[0003] As a speech playback device, the structural design of existing loudspeakers directly affects the speech playback quality. Loudspeakers in related technologies include a magnetic circuit system and a vibration system. However, in the magnetic circuit system, the auxiliary magnet is glued to the upper clamp and the yoke. When the vibration system in the loudspeaker vibrates, the air under the voice coil can only be expelled from the end of the upper clamp near the diaphragm. This prevents the air under the voice coil from being expelled in a timely or effective manner, thus reducing the acoustic performance of the loudspeaker. Summary of the Invention

[0004] The present invention provides a loudspeaker comprising a frame having a receiving space, a vibration system housed in the frame, and a magnetic circuit system for driving the vibration system to vibrate. The vibration system includes a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate and produce sound. The magnetic circuit system includes a magnetic 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 includes a first side surface opposite to the main magnet, a second side surface opposite to the first side surface, an upper surface near the upper clamping plate, and a lower surface near the yoke. The secondary magnet also has a groove communicating with the magnetic gap. The groove is recessed from the lower surface in a direction away from the yoke and penetrates 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 penetrates the first side surface and the second side surface.

[0005] Preferably, the auxiliary magnet is in the form of a ring-shaped rectangle, and the auxiliary magnet includes two relatively spaced long shaft portions and two relatively spaced short shaft portions, as well as a connecting portion connecting adjacent long shaft portions and short shaft portions.

[0006] Preferably, the groove is located in one of the long shaft portion, the short shaft portion, and the connecting portion.

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

[0008] Preferably, the groove includes a plurality of grooves, and the plurality of grooves are disposed in at least one of the long shaft portion, the short shaft portion and the connecting portion.

[0009] Preferably, the groove is rectangular.

[0010] Preferably, the magnetic yoke includes a bottom portion that fixes the main magnet and the auxiliary magnet, and side portions that extend from the bottom near both sides of the auxiliary magnet and bend toward the basket direction. The side portions include leakage holes communicating with the receiving space, and the speaker also includes a mesh covering the leakage holes.

[0011] Preferably, the loudspeaker further includes an inner cavity formed by the mesh and the auxiliary 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 loudspeaker provided by the present invention includes a groove that is recessed from the lower surface near the yoke in a direction away from the yoke and penetrates a first side surface near the main magnet and a second side surface that is spaced apart from the first side surface. Alternatively, the auxiliary magnet includes a groove that is recessed from the upper surface near the upper clamping plate in a direction away from the upper clamping plate and penetrates 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 venting the air under the voice coil when the vibration system vibrates, thereby improving the acoustic performance of the loudspeaker. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0014] Figure 1 This is a three-dimensional structural diagram of the loudspeaker in Embodiment 1 of the present invention;

[0015] Figure 2 for Figure 1 Exploded view of the speaker in the image;

[0016] Figure 3 for Figure 1 A schematic diagram of the auxiliary magnet structure in the loudspeaker;

[0017] Figure 4 For along Figure 1 Sectional view of line AA in the middle;

[0018] Figure 5 for Figure 4 Enlarged structural diagram of section C;

[0019] Figure 6 For along Figure 1 Sectional view of the middle BB line;

[0020] Figure 7 This is a three-dimensional structural diagram of the loudspeaker in Embodiment 2 of the present invention;

[0021] Figure 8 For along Figure 7 Sectional view of the DD line;

[0022] Figure 9 For along Figure 7 Sectional view of the middle EE line;

[0023] Figure 10 This is a three-dimensional structural diagram of the loudspeaker in Embodiment 3 of the present invention;

[0024] Figure 11 For along Figure 10 Sectional view of the middle FF line;

[0025] Figure 12 For along Figure 10 A cross-sectional view of the GG line in the middle;

[0026] Figure 13 For along Figure 1 A cross-sectional view of the middle HH line.

[0027] In the diagram, 100 is the loudspeaker, 10 is the frame, 20 is the vibration system, 21 is the diaphragm, 22 is the voice coil, 30 is the magnetic circuit system, 301 is the magnetic gap, 31 is the magnetic yoke, 311 is the leakage hole, 312 is the bottom, 313 is the side, 32 is the main magnet, 33 is the auxiliary magnet, 331 is the first side surface, 332 is the second side surface, 333 is the upper surface, 334 is the lower surface, 335 is the groove, 336 is the long axis, 337 is the short axis, 338 is the connecting part, 34 is the upper clamping plate, 40 is the FPC board, 50 is the mesh, and 60 is the inner cavity. Detailed Implementation

[0028] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Please see Figure 1 , Figure 2 and Figure 4 An embodiment of the present invention provides a loudspeaker 100, which includes a frame 10 having a receiving space, a vibration system 20 housed in the frame 10, a magnetic circuit system 30 for driving the vibration system 20 to vibrate, and an FPC board 40 for electrically connecting the loudspeaker 100 and external circuitry. The magnetic circuit system 30 and the vibration system 20 are fixed to the frame 10, and the frame 10 provides support for the magnetic circuit system 30 and the vibration system 20. In this embodiment, the frame 10 is rectangular.

[0031] Please 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 through the FPC board 40. When the loudspeaker 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.

[0032] Please see Figure 4 The magnetic circuit system 30 includes a magnetic yoke 31 spaced apart from the frame 10, a main magnet 32 ​​and a secondary magnet 33 fixed to the magnetic yoke 31 and close to the vibrating system 20, and an upper clamping plate 34 fixed to the secondary magnet 33. The secondary magnet 33 is arranged around the main magnet 32 ​​at intervals. 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.

[0033] Please see Figures 3 to 6 The auxiliary magnet 33 includes a first side surface 331 near the main magnet 32, a second side surface 332 opposite to the first side surface 331, an upper surface 333 near the upper clamping plate 34, and a lower surface 334 of the yoke 31. In the prior art, the auxiliary magnet 33 is fixed to the yoke 31 and the upper clamping plate 34 with glue. However, when the vibration system 20 vibrates, the glue seal between the auxiliary magnet 33 and the yoke 31 and the upper clamping plate 34 prevents the air under 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 auxiliary magnet 33 also includes a groove 335 that is recessed from the lower surface 334 in a direction away from the yoke 31 and penetrates the first side surface 331 and the second side surface 332. The groove 335 connects the magnetic gap 301 and the air outside the auxiliary magnet 33, and is used to vent the air under the voice coil 22 when the vibration system 20 vibrates, thereby improving the acoustic performance of the loudspeaker 100.

[0034] In addition to forming a groove 335 on the lower surface 334 of the auxiliary magnet 33, a groove 335 can also be formed on the upper surface 333 of the auxiliary magnet 33, similarly for venting air under the voice coil 22 when the vibration system 20 vibrates. Therefore, in the second embodiment of the present invention, the loudspeaker 200, please refer to... Figures 7 to 9 The auxiliary magnet 33 also includes a groove 335 that is recessed from the upper surface 333 in a direction away from the upper clamping plate 34 and penetrates the first side surface 331 and the second side surface 332. Combining the technical solutions of the first embodiment and the second embodiment, the speaker 300 provided in the third embodiment of the present invention is described in the following text. Figures 10 to 12 The auxiliary magnet 33 also includes a groove 335 that is recessed from the lower surface 334 in a direction away from the yoke 31 and penetrates the first side surface 331 and the second side surface 332, and a groove 335 that is recessed from the upper surface 333 in a direction away from the upper clamping plate 34 and penetrates the first side surface 331 and the second side surface 332. Therefore, in specific embodiments, grooves 335 can be selectively formed on the upper surface 333, the lower surface 334, or both the upper and lower surfaces 334 of the auxiliary magnet 33 according to the design and performance requirements of the product, increasing the flexibility of product design.

[0035] Please see Figure 3 and Figure 13 In this embodiment, the auxiliary magnet 33 is annularly rectangular. This annular shape not only increases the volume of the magnetic circuit system 30 but also allows for the free creation of grooves 335 on the auxiliary magnet 33. In other embodiments, the auxiliary magnet 33 may be non-annular. Annular auxiliary magnet 33 includes two relatively spaced long shaft portions 336 and two relatively spaced short shaft portions 337, as well as a connecting portion 338 connecting adjacent long shaft portions 336 and short shaft portions 337. The positional relationship of the grooves 335 on the auxiliary magnet 33 can be located in the long shaft portion 336, short shaft portion 337, or connecting portion 338. The number of grooves 335 can be multiple, with multiple grooves 335 disposed in at least one of the long shaft portion 336, short shaft portion 337, and connecting portion 338. The number of grooves 335 can be determined according to the actual performance requirements of the loudspeaker during implementation. In this embodiment, the second side surface 332 of the long axis portion 336, away from the main magnet 32, is flush with the yoke 31. The groove 335 can be rectangular or other shapes; the specific shape of the groove 335 is not limited here.

[0036] Please see Figure 2 and Figure 4 The loudspeaker 100 also includes a mesh 50 between the fixed magnetic yoke 31 and the frame 10, the mesh 50 being used to prevent sound-absorbing material filled in the rear cavity of the loudspeaker enclosure from entering the interior of the loudspeaker unit. The loudspeaker 100 also includes an inner cavity 60 formed by the mesh 50 and the auxiliary magnet 33, and a groove 335 connecting the inner cavity 60 and the magnetic gap 301.

[0037] Compared with the prior art, the loudspeaker 100 provided by the present invention has a groove 335 on the surface of the auxiliary magnet 33 in the magnetic circuit system 30, which connects the magnetic gap 301 and the air outside the auxiliary magnet 33, so as to discharge the air under the voice coil 22 when the vibration system 20 vibrates, thereby improving the acoustic performance of the loudspeaker 100.

[0038] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A loudspeaker comprising a frame having a receiving space, a vibration system housed 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 near the upper clamping plate, and a lower surface near the yoke; characterized in that, The auxiliary magnet is further provided with a groove communicating with the magnetic gap. The groove includes multiple grooves. At least one groove is formed by recessing from the lower surface in a direction away from the magnetic yoke and penetrates the first side surface and the second side surface. At least one groove is formed by recessing from the upper surface in a direction away from the upper clamping plate and penetrates the first side surface and the second side surface. The auxiliary magnet is annular and rectangular. The auxiliary magnet includes two relatively spaced long shaft portions, two relatively spaced short shaft portions, and a connecting portion connecting adjacent long shaft portions and short shaft portions. The long shaft portions, short shaft portions, and connecting portions are all provided with the groove.

2. The loudspeaker according to claim 1, characterized in that, The second side surface of the long axis portion, away from the main magnet, is flush with the yoke.

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

4. The loudspeaker according to claim 1, characterized in that, The magnetic yoke includes a bottom that fixes the main magnet and the auxiliary magnet, and side portions that extend from the bottom near both sides of the auxiliary magnet and bend toward the basket. The side portions include leakage holes communicating with the receiving space, and the speaker also includes a mesh covering the leakage holes.

5. The loudspeaker according to claim 4, characterized in that, The loudspeaker also includes an inner cavity formed by the mesh and the auxiliary magnet, and the groove connects the inner cavity and the magnetic gap.

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