Loudspeaker

Abstract

The invention provides a loudspeaker, which comprises a basin frame with an accommodating space, a vibration system accommodated in the basin frame and a magnetic circuit system for driving the vibration system to vibrate, and is characterized in that the magnetic circuit system comprises a magnet yoke arranged at an interval with the basin frame, main magnetic steel fixed on the magnet yoke and auxiliary magnetic steel arranged at an interval with the main magnetic steel; the vibrating system comprises a vibrating diaphragm fixed on the basin frame and a voice coil for driving the vibrating diaphragm to vibrate and produce sound, the vibrating diaphragm comprises a ball top located in the middle and a folding ring surrounding the ball top at an interval, and the auxiliary magnetic steel comprises a first auxiliary magnetic steel and a second auxiliary magnetic steel which are respectively arranged on two sides of the main magnetic steel along a first direction perpendicular to the vibration direction; according to the loudspeaker, the number of the FPC board is one, the FPC board is arranged between the basin stand and the first auxiliary magnetic steel, the width of the second auxiliary magnetic steel in the first direction is larger than that of the first auxiliary magnetic steel in the first direction, and the problems that in the prior art, due to the fact that two symmetrically-arranged FPC boards exist, the size of a magnetic circuit system is small; and the acoustic performance of the loudspeaker is improved.

Description

Technical Field

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

[0002] A loudspeaker usually includes a basin frame with a receiving space, a vibration system received in the basin frame, and a magnetic circuit system that drives the vibration system to vibrate. The loudspeaker is mainly electrically connected to the external circuit and voice coil through an FPC board, and the vibration of the voice coil in the magnetic field drives the diaphragm to vibrate, thereby producing sound.

[0003] However, in the prior art, since there are two symmetrically arranged FPC boards between the magnetic steel unit and the basin frame of the speaker, the volume of the magnetic circuit system of the entire speaker is greatly restricted under the premise of a certain volume, thereby limiting the acoustic performance of the speaker in the prior art.

[0004] Therefore, it is necessary to provide a new speaker to solve the above technical problems. Summary of the invention

[0005] The object of the present invention is to provide a loudspeaker, comprising a basket with a receiving space, a vibration system received in the basket and a magnetic circuit system for driving the vibration system to vibrate, wherein the magnetic circuit system comprises a yoke spaced apart from the basket, a main magnetic steel fixed on the yoke and a secondary magnetic steel spaced apart from the main magnetic steel, the vibration system comprises a diaphragm fixed to the basket and a voice coil for driving the diaphragm to vibrate and produce sound, the diaphragm comprises a dome located in the middle and a folded ring spaced around the dome; the secondary magnetic steel comprises a first secondary magnetic steel and a second secondary magnetic steel respectively arranged on both sides of the main magnetic steel along a first direction perpendicular to the vibration direction, the first secondary magnetic steel and the basket are spaced apart along the first direction, the width of the second secondary magnetic steel along the first direction is greater than the width of the first secondary magnetic steel along the first direction, and the loudspeaker further comprises an FPC board electrically connected to the voice coil, the number of the FPC board is one and the FPC board is arranged between the basket and the first secondary magnetic steel.

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

[0007] Preferably, the diaphragm is rectangular, the fold ring comprises a first fold ring and a second fold ring symmetrically arranged along a central axis parallel to the short axis direction, and the first fold ring and the first secondary magnet are relatively spaced apart along the vibration direction.

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

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

[0010] Preferably, the second secondary magnetic steel and the basin frame are arranged opposite to each other along the vibration direction.

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

[0012] Preferably, the magnetic circuit system also includes a main pole core located above the main magnetic steel and a secondary pole core located above the secondary magnetic steel, the secondary pole core includes a first secondary pole core and a second secondary pole core respectively arranged on both sides of the main pole core along the first direction, and 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, and the FPC board includes a bent portion close to the voice coil and attached to the planar portion, a first fixed portion fixed to the basin frame, a second fixed portion fixed to the side portion, a vertical portion connecting the bent portion and the second fixed portion, and an elastic arm connecting the first fixed portion and the second fixed portion.

[0014] Compared with the prior art, the auxiliary magnetic steel in the speaker provided by the present invention includes a first auxiliary magnetic steel and a second auxiliary magnetic steel respectively arranged on both sides of the main magnetic steel along a first direction perpendicular to the vibration direction, and the speaker also includes a main pole core and an auxiliary pole core respectively stacked on the main magnetic steel and the auxiliary magnetic steel, and the auxiliary pole core includes a first auxiliary pole core and a second auxiliary pole core respectively arranged on both sides of the main pole core along the first direction perpendicular to the vibration direction. An FPC plate is arranged between the first auxiliary magnetic steel and the basin frame perpendicular to the vibration direction, so the width of the second auxiliary magnetic steel and the second auxiliary pole core in the first direction perpendicular to the vibration direction can be extended and fixed on the basin frame, and the width of the second auxiliary magnetic steel and the second auxiliary pole core in the first direction is respectively greater than the width of the first auxiliary magnetic steel and the second auxiliary pole core in the first direction, which effectively increases the volume of the magnetic circuit system, thereby improving the acoustic performance of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of a three-dimensional structure of a loudspeaker in one embodiment of the present invention; Figure 2 for Figure 1 An exploded view of the speaker in ; Figure 3 For along Figure 1 Sectional view along line AA; Figure 4 for Figure 1A top view of the combined structure of the FPC board, the main magnetic steel and the auxiliary magnetic steel in the speaker; Figure 5 for Figure 1 Schematic diagram of the combined structure of the FPC board, voice coil, basin frame and diaphragm in the speaker; Figure 6 for Figure 1 An exploded diagram of the speaker structure; Figure 7 for Figure 1 A top view of the combined structure of the FPC board and the diaphragm in the speaker; Figure 8 A schematic diagram of a three-dimensional structure of a loudspeaker according to another embodiment of the present invention; Fig. 9 For along Figure 8 Cross-sectional view along line BB. DETAILED DESCRIPTION

[0016] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0017] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0018] See also Figure 1 and Figure 2 The embodiment of the present invention provides a speaker 100, which includes a basin frame 10 having a receiving space, a vibration system 20 received in the basin frame 10, a magnetic circuit system 30 driving the vibration system 20 to vibrate, and an FPC board 40 for electrically connecting the speaker 100 and an external circuit. The magnetic circuit system 30 and the vibration system 20 are fixed on the basin frame 10, and the basin frame 10 can support the magnetic circuit system 30 and the vibration system 20, and the basin frame 10 is rectangular.

[0019] See also Figure 1 , Figure 2 and Figure 3 The vibration system 20 includes a diaphragm 22 fixed on the basin 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 speaker 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.

[0020] See also Figure 2 , Figure 3 and Figure 4 The magnetic circuit system 30 includes a yoke 31 spaced apart from the basin frame 10, and a main magnet 32 ​​and a secondary magnet 33 fixed on the yoke 31 and close to one side of the vibration system 20. The secondary magnet 33 is spaced around the main magnet 32. The secondary magnet 33 and the main magnet 32 ​​together form a magnetic gap 301, and the voice coil 23 is suspended in the magnetic gap 301. The secondary magnet 33 includes a first secondary magnet 321 and a second secondary magnet 322 respectively arranged on both sides of the main magnet 32 ​​along a first direction 01 perpendicular to the vibration direction 03.

[0021] See also Figure 2 and Figure 5 The dome 221 includes a plane portion 2211 perpendicular to the vibration direction 03 and a side portion 2212 extending from the edge of the plane portion 2211 toward the magnetic circuit system 30. The FPC board 40 includes a bent portion 401 close to the voice coil 23 and attached to the plane portion 2211, a first fixed portion 402 fixed to the basin frame 10, a second fixed portion 403 fixed to the side portion 2212, a vertical portion 404 connecting the bent portion 401 and the second fixed portion 403, and an elastic arm 405 connecting the first fixed portion 402 and the second fixed portion 403.

[0022] In the prior art, conventional speakers have two symmetrically arranged FPC boards, which greatly restricts the volume of the magnetic circuit system of the speaker under the premise of a certain volume, thereby limiting the acoustic performance of the speaker. Figure 2 , Figure 3 and Figure 4, but in the present invention, only one FPC board 40 is arranged between the first secondary magnetic steel 331 and the basin frame 10 perpendicular to the vibration direction 03, the width of the second secondary magnetic steel 332 in the first direction 01 perpendicular to the vibration direction 03 is greater than the width of the first secondary magnetic steel 331 in the first direction 01 perpendicular to the vibration direction 03, and the optimal choice for the second secondary magnetic steel 332 is to be arranged opposite to the basin frame 10 along the vibration direction 03. The magnetic circuit system 30 also includes a main pole core 34 located above the main magnetic steel 32 and a secondary pole core 35 located above the secondary magnetic steel 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 speaker 100 of the present invention only has one FPC board 40 disposed between the side of the magnetic circuit system 30 where the first secondary magnetic steel 331 and the first secondary pole core 351 are located and the basin frame 10, the widths of the second secondary pole core 352 and the second secondary magnetic steel 332 in the first direction 01 perpendicular to the vibration direction 03 are the same, so the width of the second secondary pole core 352 in the first direction 01 perpendicular to the vibration direction 03 is also greater than the width of the first secondary pole core 351 in the first direction 01 perpendicular to the vibration direction 03, and the optimal setting for the second secondary pole core 352 is to fix it on the basin frame 10. Compared with the prior art, the speaker 100 of the present invention effectively increases the volume of the magnetic circuit system 30, thereby improving the acoustic performance of the speaker 100.

[0023] See also Figure 6 Along the first direction 01, the geometric center 230 of the voice coil 23 moves to the side of the geometric center 220 of the diaphragm 22 away from the FPC board 40, further improving the vibration balance of the vibration system 20 in the first direction 01, thereby improving the acoustic performance of the speaker 100.

[0024] See also Figure 2 and Figure 7 The diaphragm 22 includes a dome 221 in the middle and a fold 222 that surrounds the dome 221. The diaphragm 22 is rectangular, and the fold 222 includes a first fold 2221 and a second fold 2222 that are symmetrically arranged along a central axis 022 parallel to the short axis direction. The first fold 2221 and the first secondary magnet 331 are arranged relatively spaced apart along the vibration direction 03.

[0025] For other embodiments, see Figure 8 and Fig. 9, and the balance of the vibration system 20 can also be improved by increasing the thickness of the second fold ring 2222 of the diaphragm 22 in the vibration direction 03. Among them, the second fold ring 2222 includes a thickened portion 2223, and the thickness of the thickened portion 2223 in the vibration direction 03 is greater than the thickness of the first fold ring 2221 in the vibration direction 03. According to actual needs, a part of the second fold ring 2222 can be set as the thickened portion 2223, or the entire second fold ring 2222 can be set as the thickened portion 2223. In this case, the thickness of the second fold ring 2222 in the vibration direction 03 is greater than the thickness of the first fold ring 2221 in the vibration direction 03.

[0026] Compared with the prior art, the speaker 100 of the present invention is provided with an FPC board 40 between the first secondary magnetic steel 331 and the basin frame 10, and no FPC board 40 is required between the second secondary magnetic steel 332 and the basin frame 10, so the width of the second secondary magnetic steel 332 can be increased to increase the volume of the magnetic circuit system 30 and effectively improve the acoustic performance of the speaker. More preferably, the width of the second secondary magnetic steel 332 can be increased to make it relative to the basin frame 10 along the vibration direction 03, further improving the acoustic performance of the speaker.

[0027] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A loudspeaker, comprising a basin frame with a receiving space, a vibration system received in the basin frame, and a magnetic circuit system for driving the vibration system to vibrate, wherein the magnetic circuit system comprises a yoke spaced apart from the basin frame, a main magnetic steel fixed on the yoke, and a secondary magnetic steel spaced apart from the main magnetic steel, the vibration system comprises a diaphragm fixed to the basin frame and a voice coil for driving the diaphragm to vibrate and produce sound, the diaphragm comprises a dome located in the middle and a folded ring spaced around the dome; characterized in that: The auxiliary magnetic steel includes a first auxiliary magnetic steel and a second auxiliary magnetic steel respectively arranged on both sides of the main magnetic steel along a first direction perpendicular to the vibration direction, the first auxiliary magnetic steel and the basin frame are spaced apart along the first direction, the width of the second auxiliary magnetic steel along the first direction is greater than the width of the first auxiliary magnetic steel along the first direction, and the speaker also includes an FPC board electrically connected to the voice coil, the number of the FPC board is one and is arranged between the basin frame and the first auxiliary magnetic steel.

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

3. The loudspeaker according to claim 1, characterized in that: The diaphragm is rectangular, and the fold ring includes a first fold ring and a second fold ring symmetrically arranged along a central axis parallel to the short axis direction. The first fold ring and the first secondary magnet are arranged relatively spaced apart along the vibration direction.

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

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

6. The loudspeaker according to claim 1, characterized in that: The second secondary magnetic steel and the basin frame are arranged opposite to each other along the vibration direction.

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

8. The loudspeaker according to claim 1, characterized in that: The magnetic circuit system also includes a main pole core located above the main magnetic steel and a secondary pole core located above the secondary magnetic steel, the secondary pole core includes a first secondary pole core and a second secondary pole core respectively arranged on both sides of the main pole core along the first direction, and 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 plane portion perpendicular to the vibration direction and a side portion extending from the short axis edge of the plane portion toward the magnetic circuit system, and the FPC board includes a bent portion close to the voice coil and attached to the plane portion, a first fixing portion fixed to the basin frame, a second fixing portion fixed to the side portion, a vertical portion connecting the bent portion and the second fixing portion, and an elastic arm connecting the first fixing portion and the second fixing portion.

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