loudspeaker

Abstract

The present invention provides a loudspeaker, comprising: a basket having an accommodating space, a vibration system accommodated in the basket, and a magnetic circuit system for driving the vibration system to vibrate. The magnetic circuit system comprises a yoke spaced apart from the basket, a main magnet fixed on the yoke, and auxiliary magnets spaced apart from the main magnet. The vibration system comprises a diaphragm fixed to the basket and a voice coil used to drive the diaphragm to vibrate and produce sound. The diaphragm comprises a dome located at a central position and a surround spaced apart from and surrounding the dome. The auxiliary magnets comprise a first auxiliary magnet and a second auxiliary magnet respectively disposed on two sides of the main magnet in a first direction perpendicular to a vibration direction. The loudspeaker of the present invention is provided with a single FPC board disposed between the basket and the first auxiliary magnet, and the width of the second auxiliary magnet in the first direction is greater than the width of the first auxiliary magnet in the first direction, thereby effectively preventing the problem in the existing technology of two symmetrically arranged FPC boards causing a reduction in the volume of the magnetic circuit system, and accordingly improving the acoustic performance of the loudspeaker.

Description

speaker Technical Field

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

[0002] A loudspeaker typically consists of a frame with a housing space, a vibrating system housed within the frame, and a magnetic circuit system that drives the vibrating system. The loudspeaker is primarily connected to external circuitry and a voice coil via an FPC board. Sound is produced by the vibration of the voice coil in a magnetic field, which in turn drives the diaphragm to vibrate.

[0003] However, in the prior art, because there are two symmetrically arranged FPC boards between the magnet unit and the frame of the loudspeaker, the volume of the magnetic circuit system of the loudspeaker is greatly limited under the premise of a certain volume, which limits the acoustic performance of the loudspeaker in the prior art.

[0004] Therefore, it is necessary to provide a new loudspeaker to solve the above-mentioned technical problems. Technical issues

[0005] The present invention aims to provide a loudspeaker comprising a frame having a receiving space, a vibration system housed within the frame, and a magnetic circuit system for driving the vibration system to vibrate. The magnetic circuit system includes a magnetic yoke spaced apart from the frame, a main magnet fixed to the magnetic yoke, and auxiliary magnets spaced apart from the main magnet. The vibration system includes a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate and produce sound. The diaphragm includes a dome located in the center and folded rings spaced around the dome. The auxiliary magnets include a first auxiliary magnet and a second auxiliary magnet respectively disposed on both sides of the main magnet along a first direction perpendicular to the vibration direction. The first auxiliary magnet and the frame are spaced apart along the first direction, and the width of the second auxiliary magnet along the first direction is greater than the width of the first auxiliary magnet along the first direction. The loudspeaker also includes an FPC board electrically connected to the voice coil, and one FPC board is disposed between the frame and the first auxiliary magnet. Technical solutions

[0006] Preferably, along the first direction, the geometric center of the voice coil is located on the side of the diaphragm away from the geometric center of the FPC plate.

[0007] Preferably, the diaphragm is rectangular, and the folded ring includes a first folded ring and a second folded ring symmetrically arranged along a central axis parallel to the minor axis direction, with the first folded ring and the first auxiliary magnet being spaced apart relative to each other along the vibration direction.

[0008] Preferably, the second fold ring includes a thickened portion, the thickness of which is greater than the thickness of the first fold ring.

[0009] Preferably, the thickness of the second fold is greater than the thickness of the first fold.

[0010] Preferably, the second auxiliary magnet is arranged opposite to the basin frame along the vibration direction.

[0011] Preferably, the basin stand is rectangular, and the first direction is parallel to the long axis of the basin stand.

[0012] Preferably, the magnetic circuit system further includes a main pole core located above the main magnet and a secondary pole core located above the secondary magnet. The secondary pole core includes a first secondary pole core and a second secondary pole core respectively disposed on both sides of the main pole core along the first direction. The width of the second secondary pole core in the first direction is greater than the width of the first secondary pole core in the first direction.

[0013] Preferably, the dome includes a planar portion perpendicular to the vibration direction and a side portion extending from the short axis edge of the planar portion toward the magnetic circuit system. The FPC board includes a bent portion close to the voice coil and conforming to the planar portion, a first fixing portion fixed to the frame, a second fixing portion fixed to the side portion, a vertical portion connecting the bent portion and the second fixing portion, and a spring arm connecting the first fixing portion and the second fixing portion. Beneficial effects

[0014] Compared with the prior art, the loudspeaker provided by the present invention includes a first secondary magnet and a second secondary magnet respectively disposed on both sides of the main magnet along a first direction perpendicular to the vibration direction. The loudspeaker also includes a main pole core and a secondary pole core respectively stacked on the main magnet and the secondary magnet. The secondary pole core includes a first secondary pole core and a second secondary pole core respectively disposed on both sides of the main pole core along a first direction perpendicular to the vibration direction. An FPC plate is disposed between the first secondary magnet and the frame perpendicular to the vibration direction. Therefore, the width of the second secondary magnet and the second secondary pole core in the first direction perpendicular to the vibration direction can be extended and fixed on the frame. The width of the second secondary magnet and the second secondary pole core in the first direction is greater than the width of the first secondary magnet and the second secondary pole core in the first direction, which effectively increases the volume of the magnetic circuit system and thus improves the acoustic performance of the loudspeaker. Attached Figure Description

[0015] Figure 1 is a three-dimensional structural diagram of a loudspeaker according to an embodiment of the present invention;

[0016] Figure 2 is an exploded view of the speaker in Figure 1;

[0017] Figure 3 is a cross-sectional view along line AA in Figure 1;

[0018] Figure 4 is a top view of the combined structure of the FPC board, main magnet, and auxiliary magnet in the loudspeaker of Figure 1;

[0019] Figure 5 is a schematic diagram of the combined structure of the FPC board, voice coil, frame and diaphragm in the loudspeaker of Figure 1;

[0020] Figure 6 is an exploded view of part of the speaker structure in Figure 1;

[0021] Figure 7 is a top view of the combined structure of the FPC board and diaphragm in the loudspeaker of Figure 1;

[0022] Figure 8 is a three-dimensional structural diagram of a loudspeaker according to another embodiment of the present invention;

[0023] Figure 9 is a cross-sectional view along line BB in Figure 8. Embodiments of the present invention

[0024] 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.

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Referring to Figures 1 and 2, an embodiment of the present invention provides a loudspeaker 100, which includes a frame 10 with 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. The frame 10 is rectangular.

[0027] Please refer to Figures 1, 2, and 3. The vibration system 20 includes a diaphragm 22 fixed on the frame 10 and a voice coil 23 that drives the diaphragm 22 to vibrate and produce sound. An electrical signal is introduced to the voice coil 23 through the FPC board 40. When the loudspeaker 100 is powered on, the voice coil 23 vibrates under the action of the magnetic circuit system 30, thereby driving the diaphragm 22 to vibrate and produce sound.

[0028] Please refer to Figures 2, 3, and 4. The magnetic circuit system 30 includes a magnetic yoke 31 spaced apart from the frame 10, and a main magnet 32 ​​and a secondary magnet 33 fixed to the magnetic yoke 31 and close to the vibrating system 20. The secondary magnets 33 are arranged around the main magnet 32 ​​at intervals. The secondary magnets 33 and the main magnets 32 together form a magnetic gap 301, in which the voice coil 23 is suspended. The secondary magnets 33 include a first secondary magnet 321 and a second secondary magnet 322 respectively disposed on both sides of the main magnet 32 ​​along a first direction 01 perpendicular to the vibration direction 03.

[0029] Referring to Figures 2 and 5, the dome 221 includes a planar portion 2211 perpendicular to the vibration direction 03 and a side portion 2212 extending from the edge of the planar portion 2211 toward the magnetic circuit system 30. The FPC board 40 includes a bent portion 401 close to the voice coil 23 and conforming to the planar portion 2211, a first fixing portion 402 fixed to the frame 10, a second fixing portion 403 fixed to the side portion 2212, a vertical portion 404 connecting the bent portion 401 and the second fixing portion 403, and a spring arm 405 connecting the first fixing portion 402 and the second fixing portion 403.

[0030] In existing technologies, conventional loudspeakers have two symmetrically arranged FPC boards, which significantly limits the volume of the magnetic circuit system within a given loudspeaker volume, thus restricting the loudspeaker's acoustic performance. (See Figures 2, 3, and 4). However, in this invention, only one FPC board 40 is arranged between the first auxiliary magnet 331 and the frame 10 perpendicular to the vibration direction 03. The width of the second auxiliary magnet 332 in the first direction 01 perpendicular to the vibration direction 03 is greater than the width of the first auxiliary magnet 331 in the first direction 01 perpendicular to the vibration direction 03. The optimal choice for the second auxiliary magnet 332 is to be arranged opposite to the frame 10 along the vibration direction 03. The magnetic circuit system 30 also includes a main pole core 34 located above the main magnet 32 ​​and a secondary pole core 35 located above the auxiliary magnet 33. The secondary pole core 35 includes a first secondary pole core 351 and a second secondary pole core 352 respectively arranged on both sides of the main pole core 34 along the first direction 01 perpendicular to the vibration direction 03. Since the loudspeaker 100 of the present invention only has one FPC board 40 between the magnetic circuit system 30 where the first auxiliary magnet 331 and the first auxiliary pole core 351 are located and the frame 10, and the width of the second auxiliary pole core 352 and the second auxiliary magnet 332 in the first direction 01 perpendicular to the vibration direction 03 is the same, the width of the second auxiliary pole core 352 in the first direction 01 perpendicular to the vibration direction 03 is also greater than the width of the first auxiliary pole core 351 in the first direction 01 perpendicular to the vibration direction 03. The optimal choice for the second auxiliary pole core 352 is to fix it on the frame 10. Compared with the prior art, the loudspeaker 100 of the present invention effectively increases the volume of the magnetic circuit system 30, thereby improving the acoustic performance of the loudspeaker 100.

[0031] Please refer to Figure 6. Along the first direction 01, the geometric center 230 of the voice coil 23 moves to the side away from the geometric center 220 of the diaphragm 22, further improving the vibration balance of the vibration system 20 in the first direction 01, thereby improving the acoustic performance of the loudspeaker 100.

[0032] Please refer to Figures 2 and 7. The diaphragm 22 includes a dome 221 located in the middle and folded rings 222 spaced around the dome 221. The diaphragm 22 is rectangular. The folded rings 222 include a first folded ring 2221 and a second folded ring 2222 symmetrically arranged along a central axis 022 parallel to the minor axis. The first folded ring 2221 and the first auxiliary magnet 331 are spaced apart from each other along the vibration direction 03.

[0033] In other embodiments, referring to Figures 8 and 9, the balance of the vibration system 20 can be improved by increasing the thickness of the second fold 2222 of the diaphragm 22 in the vibration direction 03. The second fold 2222 includes a thickened portion 2223, the thickness of which in the vibration direction 03 is greater than the thickness of the first fold 2221 in the vibration direction 03. Depending on actual needs, a portion of the second fold 2222 can be designated as the thickened portion 2223, or the entire second fold 2222 can be designated as the thickened portion 2223. In this case, the thickness of the second fold 2222 in the vibration direction 03 is greater than the thickness of the first fold 2221 in the vibration direction 03.

[0034] Compared with the prior art, the loudspeaker 100 of the present invention has an FPC board 40 disposed between the first auxiliary magnet 331 and the frame 10, while the second auxiliary magnet 332 does not require an FPC board 40 between it and the frame 10. Therefore, the width of the second auxiliary magnet 332 can be increased to increase the volume of the magnetic circuit system 30 and effectively improve the acoustic performance of the loudspeaker. More preferably, the width of the second auxiliary magnet 332 can be increased so that it is positioned opposite the frame 10 along the vibration direction 03, further improving the acoustic performance of the loudspeaker.

[0035] 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 magnetic circuit system comprising a magnetic yoke spaced apart from the frame, a main magnet fixed to the magnetic yoke, and a secondary magnet spaced apart from the main magnet; the vibration system comprising a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate and produce sound, the diaphragm comprising a dome located at a central position and surrounds the dome at intervals; characterized in that, The auxiliary magnet includes a first auxiliary magnet and a second auxiliary magnet respectively disposed on both sides of the main magnet along a first direction perpendicular to the vibration direction. The first auxiliary magnet and the frame are spaced apart along the first direction. The width of the second auxiliary magnet along the first direction is greater than the width of the first auxiliary magnet along the first direction. The loudspeaker also includes an FPC board electrically connected to the voice coil. There is one FPC board disposed between the frame and the first auxiliary magnet.

2. The loudspeaker according to claim 1, characterized in that, Along the first direction, the geometric center of the voice coil is located on the side of the diaphragm away from the geometric center of the FPC plate.

3. The loudspeaker according to claim 1, characterized in that, The diaphragm is rectangular, and the folded ring includes a first folded ring and a second folded ring symmetrically arranged along a central axis parallel to the minor axis. The first folded ring and the first auxiliary magnet are spaced apart relative to each other along the vibration direction.

4. The loudspeaker according to claim 3, characterized in that, The second fold includes a thickened portion, the thickness of which is greater than the thickness of the first fold.

5. The loudspeaker according to claim 3, characterized in that, The thickness of the second fold is greater than the thickness of the first fold.

6. The loudspeaker according to claim 1, characterized in that, The second magnet is positioned opposite the basin frame along the vibration direction.

7. The loudspeaker according to claim 1, characterized in that, The basin stand is rectangular, and the first direction is parallel to the long axis of the basin stand.

8. The loudspeaker according to claim 1, characterized in that, The magnetic circuit system further includes a main pole core located above the main magnet and a secondary pole core located above the secondary magnet. The secondary pole core includes a first secondary pole core and a second secondary pole core respectively disposed on both sides of the main pole core along the first direction. The width of the second secondary pole core in the first direction is greater than the width of the first secondary pole core in the first direction.

9. The loudspeaker according to claim 1, characterized in that, The dome includes a planar portion perpendicular to the vibration direction and a side portion extending from the short axis edge of the planar portion toward the magnetic circuit system. The FPC board includes a bent portion close to the voice coil and conforming to the planar portion, a first fixing portion fixed to the frame, a second fixing portion fixed to the side portion, a vertical portion connecting the bent portion and the second fixing portion, and a spring arm connecting the first fixing portion and the second fixing portion.

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