speaker

Abstract

The present invention provides a loudspeaker including a basin frame with a receiving space, a vibration system received in the basin frame, and a magnetic circuit system driving the vibration system to vibrate, the vibration system including a diaphragm fixed to the basin frame and a voice coil driving the diaphragm to vibrate and produce sound, the diaphragm including a dome located in the middle, the dome including a plane portion perpendicular to the vibration direction and a side portion extending from the edge of the plane portion toward the magnetic circuit system, the basin frame including a main body portion in an annular structure and a protrusion extending from the main body portion along the vibration direction and away from the diaphragm direction, the loudspeaker also includes an FPC board electrically connected to the voice coil, the FPC board including a first fixing portion fixed to the protrusion portion, a second fixing portion connected to the side portion, and an elastic arm connecting the first fixing portion and the second fixing portion. The elastic arm of the present invention is arranged at a relative interval from the main body portion of the basin frame along the vibration direction, effectively avoiding the problem that the magnetic circuit system occupies less space in the prior art and thus causing the volume to be small, thereby improving the acoustic performance of the loudspeaker.

Description

Technical Field

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

[0002] A speaker is an electroacoustic converter that can convert electrical signals into sound signals and radiate them into the air. Speakers play an indispensable role in audio devices. Speakers usually include a magnetic circuit system, a vibration system, a basin frame and an FPC board. The voice coil of the vibration system is energized to generate an induced magnetic field that works together with the magnetic field of the magnetic circuit system to generate an upward or downward force, driving the diaphragm of the vibration system to vibrate and push the air to make sound. Currently, consumers' demand for sound quality is also increasing, and correspondingly, designers' performance requirements for speakers are also increasing.

[0003] In the prior art, the voice coil of the speaker is mainly connected to the external circuit through an FPC board. However, since the solder pads connecting the FPC board to the external circuit are fixed on the basket, the elastic arm of the FPC board needs to be arranged in a receiving space that is bent and extended to the basket in a direction perpendicular to the vibration direction, which reduces the space occupied by the magnetic circuit system and affects the acoustic performance of the speaker. Summary of the invention

[0004] The object of the present invention is to provide a loudspeaker, which comprises 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 fixed to 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 dome comprises a plane portion perpendicular to the vibration direction and a side portion extending from the edge of the plane portion toward the magnetic circuit system, the basket comprises a main body portion in an annular structure and a protrusion extending from the main body portion along the vibration direction and away from the diaphragm; the loudspeaker also comprises a protrusion spaced apart from the main body portion. The FPC board electrically connected to the voice coil, the FPC board comprising a first fixing portion fixed to the protruding portion, a second fixing portion connected to the side portion, and an elastic arm connecting the first fixing portion and the second fixing portion, the elastic arm and the main body portion are arranged relatively spaced apart along the vibration direction, the FPC board comprises a first FPC board and a second FPC board arranged on opposite sides of the auxiliary magnetic steel, the first FPC board also comprises a bending portion attached to the surface of the planar portion and facing the voice coil and a vertical portion connecting the second fixing portion and the bending portion, the bending portion comprises a solder pad electrically connected to the voice coil.

[0005] Preferably, the basin frame is rectangular, the main body includes two oppositely arranged long axis sides and two short axis sides connecting the long axis sides, and the protrusion extends from the edge of the short axis side and is formed integrally.

[0006] Preferably, the auxiliary magnet includes a first auxiliary magnet arranged on opposite sides of the main magnet along the long axis direction, the first auxiliary magnet includes a side surface parallel to the vibration direction and away from the main magnet, and the elastic arm is parallel to the side surface.

[0007] Preferably, the auxiliary magnetic steel further includes second auxiliary magnetic steels arranged on opposite sides of the main magnetic steel along the short axis direction, the adjacent first auxiliary magnetic steels and the second auxiliary magnetic steels are connected to each other, and the connection between the first auxiliary magnetic steel and the second auxiliary magnetic steel is at a right angle.

[0008] Preferably, the first FPC board further includes an electrical connection portion extending from the first fixing portion and away from the basin frame, and the electrical connection portion is used to connect the voice coil to an external circuit.

[0009] Preferably, the vertical portion and the voice coil are spaced apart in a direction perpendicular to the vibration direction.

[0010] Preferably, the elastic arm includes a first elastic arm connected to the first fixing portion, a second elastic arm connected to the second fixing portion, and an arc portion connecting the first elastic arm and the second elastic arm, and the first elastic arm and the second elastic arm are parallel to each other.

[0011] Preferably, the secondary magnetic steel includes a avoidance portion recessed from the side surface toward the main magnetic steel, and the second fixing portion and the avoidance portion are arranged relative to each other along the vibration direction.

[0012] Compared with the related art, the speaker provided by the present invention includes a basin frame with a accommodating space, the basin frame includes a main body portion in an annular structure and a raised portion extending from the main body portion along the vibration direction and away from the diaphragm, the speaker also includes an FPC board electrically connected to the voice coil, the FPC board includes a first fixing portion fixed to the raised portion, a second fixing portion connected to the diaphragm, and an elastic arm connecting the first fixing portion and the second fixing portion, the elastic arm and the main body portion are arranged at a relative interval along the vibration direction, effectively reducing the space occupied by the FPC board in the basin frame, thereby increasing the volume of the magnetic circuit system and improving the acoustic performance of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of a three-dimensional structure of a loudspeaker in one embodiment of the present invention;

[0014] Figure 2 for Figure 1 An exploded view of the speaker in ;

[0015] Figure 3 For along Figure 1 Sectional view along line AA;

[0016] Figure 4 for Figure 1 Schematic diagram of the combined structure of the FPC board, diaphragm, basin frame and voice coil in the speaker;

[0017] Figure 5 for Figure 4 The enlarged structural diagram of part B in the middle;

[0018] Figure 6 for Figure 1 A schematic diagram of the combined structure of the FPC board and the basin frame in the speaker;

[0019] Figure 7 for Figure 1 Schematic diagram of the combined structure without the yoke of the speaker. DETAILED DESCRIPTION

[0020] 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.

[0021] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0022] 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.

[0023] 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.

[0024] See also Figure 2 and Figure 3 The magnetic circuit system 30 includes a yoke 31 fixed to the frame 10, and a main magnet 32 ​​and a secondary magnet 33 fixed to the side of the yoke 31 close to the vibration system 20. The secondary magnet 33 is arranged 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 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 secondary magnet 33. The secondary pole core 35 is fixed to the frame 10 to support the magnetic circuit system on the frame 10.

[0025] See also Figure 2 and Figure 4 The diaphragm 22 includes a dome 221 located in the middle and a folding ring 222 spaced around the dome 221 . The dome 221 includes a plane portion 2211 perpendicular to the vibration direction and a side portion 2212 extending from the edge of the plane portion 2211 toward the magnetic circuit system 30 .

[0026] See also Figure 4 , Figure 5 and Figure 6 The basin frame 10 includes a main body 11 in an annular structure and a protrusion 12 extending from the main body 11 along the vibration direction and away from the diaphragm 22. The basin frame 10 is rectangular, and the main body 11 includes two long axis sides 111 arranged oppositely and two short axis sides 112 connecting the long axis sides 111. The protrusion 12 is an integrally formed extension of the edge of the short axis side 112. The FPC board 40 includes a first FPC board 41 and a second FPC board 42 arranged on opposite sides of the auxiliary magnetic steel 33 along the long axis direction. The first FPC board 41 and the second FPC board 42 include a first fixing part 401 fixed to the protrusion 12, a second fixing part 402 connected to the side part 2212, and an elastic arm 403 connecting the first fixing part 401 and the second fixing part 402. However, in the present invention, the first FPC board 41 is provided with an electrical connection part 404 extending from the first fixing part 401 and away from the basin frame 10, and the electrical connection part 404 is used to connect the voice coil 23 with an external circuit. At the same time, the elastic arm 403 of the FPC board 40 is arranged relatively spaced from the main body 11 of the basin frame 10 along the vibration direction. Compared with the prior art in which the elastic arm needs to extend into the accommodation space of the basin frame, the accommodation space occupied by the FPC board 40 is effectively reduced, thereby increasing the volume of the magnetic circuit system 30, and further improving the acoustic performance of the speaker 100.

[0027] See also Figure 4 and Figure 5The elastic arm 403 includes a first elastic arm 4031 connected to the first fixing portion 401, a second elastic arm 4032 connected to the second fixing portion 402, and an arc portion 4033 connecting the first elastic arm 4031 and the second elastic arm 4032, and the first elastic arm 4031 and the second elastic arm 4032 are parallel to each other. In addition, the first FPC board 41 also includes a bending portion 414 attached to the plane portion 2211 and facing the surface of the voice coil 23, and a vertical portion 415 connecting the second fixing portion 402 and the bending portion 414, wherein the vertical portion 415 and the voice coil 23 are spaced apart perpendicular to the vibration direction. The bending portion 414 includes a pad 416 electrically connected to the voice coil 23.

[0028] See also Figure 2 and Figure 7 The auxiliary magnetic steel 33 includes a first auxiliary magnetic steel 331 disposed on two opposite sides of the main magnetic steel 32 along the long axis direction, and the first auxiliary magnetic steel 331 includes a side surface 3311 parallel to the vibration direction and away from the main magnetic steel 32. Specifically, the elastic arm 403 is parallel to the side surface 3311. The auxiliary magnetic steel 33 includes a avoidance portion 333 recessed from the side surface 3311 and toward the main magnetic steel 32, wherein the second fixing portion 402 of the FPC board 40 and the avoidance portion 333 are disposed opposite to each other in the vibration direction to prevent the FPC board 40 from colliding with the main magnetic steel 32 during vibration. At the same time, the auxiliary magnetic steel 33 also includes a second auxiliary magnetic steel 332 disposed on two opposite sides of the main magnetic steel 32 along the short axis direction, and the adjacent first auxiliary magnetic steel 331 and the second auxiliary magnetic steel 332 are connected to each other, and the connection between the first auxiliary magnetic steel 331 and the second auxiliary magnetic steel 332 is at a right angle, which effectively increases the volume of the auxiliary magnetic steel 33, thereby improving the magnetic conductivity of the magnetic circuit system 30.

[0029] Compared with the prior art in which the solder pads of the FPC board of the speaker are fixed on the basin frame, which requires the elastic arm to be bent and extended into the receiving space of the basin frame, the elastic arm 403 of the speaker 100 of the present invention is arranged relatively spaced from the main body 11 of the basin frame 10 along the vibration direction, which effectively increases the volume of the magnetic circuit system 30 in the receiving space of the basin frame 10, thereby improving the acoustic performance of the speaker 100.

[0030] 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 with a receiving space, a vibration system received in the basin and a magnetic circuit system for driving the vibration system to vibrate, wherein the magnetic circuit system comprises a yoke fixed to the basin, a main magnetic steel fixed on the magnetic yoke and a secondary magnetic steel spaced apart from the main magnetic steel, the vibration system comprises a diaphragm fixed to the basin 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 dome comprises a plane portion perpendicular to the vibration direction and a side portion extending from the edge of the plane portion toward the magnetic circuit system, the basin comprises a main body portion in an annular structure and a protruding portion extending from the main body portion along the vibration direction and away from the diaphragm; characterized in that The loudspeaker further comprises an FPC board electrically connected to the voice coil, the FPC board comprising a first fixing portion fixed to the protruding portion, a second fixing portion connected to the side portion, and an elastic arm connecting the first fixing portion and the second fixing portion, the elastic arm and the main body portion are arranged with a relative interval along the vibration direction, the elastic arm comprises a first elastic arm connected to the first fixing portion, a second elastic arm connected to the second fixing portion, and an arc-shaped portion connecting the first elastic arm and the second elastic arm, the first elastic arm and the second elastic arm are parallel to each other, the first fixing portion extends from an end of the first elastic arm away from the arc-shaped portion in a direction parallel to the second elastic arm and is fixed to the protruding portion, the FPC board comprises a first FPC board and a second FPC board arranged on opposite sides of the auxiliary magnetic steel, the first FPC board further comprises a bending portion attached to the surface of the plane portion and facing the voice coil and a vertical portion connecting the second fixing portion and the bending portion, the bending portion comprises a pad electrically connected to the voice coil.

2. The loudspeaker according to claim 1, characterized in that: The basin frame is rectangular, the main body includes two oppositely arranged long axis sides and two short axis sides connecting the long axis sides, and the protrusion extends from the edge of the short axis side and is integrally formed.

3. The loudspeaker according to claim 1, characterized in that: The auxiliary magnetic steel includes a first auxiliary magnetic steel arranged on two opposite sides of the main magnetic steel along the long axis direction, the first auxiliary magnetic steel includes a side surface parallel to the vibration direction and away from the main magnetic steel, and the elastic arm is parallel to the side surface.

4. The loudspeaker according to claim 3, characterized in that: The auxiliary magnetic steel also includes second auxiliary magnetic steels arranged on opposite sides of the main magnetic steel along the short axis direction. The adjacent first auxiliary magnetic steels and the second auxiliary magnetic steels are connected to each other, and the connection between the first auxiliary magnetic steel and the second auxiliary magnetic steel is at a right angle.

5. The loudspeaker according to claim 1, characterized in that: The first FPC board further includes an electrical connection portion extending from the first fixing portion and away from the basin frame, and the electrical connection portion is used to connect the voice coil with an external circuit.

6. The loudspeaker according to claim 1, characterized in that: The vertical portion and the voice coil are spaced apart in a direction perpendicular to the vibration direction.

7. The loudspeaker according to claim 3, characterized in that: The secondary magnetic steel includes a relief portion recessed from the side surface toward the main magnetic steel, and the second fixing portion and the relief portion are arranged opposite to each other along the vibration direction.

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