CN110545506B

CN110545506B - Loudspeaker

Info

Publication number: CN110545506B
Application number: CN201911062832.5A
Authority: CN
Inventors: 刘海峰; 毕文达
Original assignee: Gettop Acoustic Co Ltd
Current assignee: Gettop Acoustic Co Ltd
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-02-07
Anticipated expiration: 2039-11-04
Also published as: CN110545506A

Abstract

The invention discloses a loudspeaker, which comprises a vibration system, wherein the vibration system comprises a vibrating diaphragm and a voice coil assembly, the voice coil assembly comprises a voice coil and a voice coil framework, the voice coil framework comprises a connecting part with the vibrating diaphragm, a connecting part with the voice coil and a first extending part, one end of the first extending part is connected with the connecting part with the vibrating diaphragm, the other end of the first extending part is connected with the connecting part with the voice coil, and the first extending part enables the voice coil to have the height in the Z-axis direction far away from the vibrating diaphragm. The spherical roof has large radiation area SD and high sensitivity; the special voice coil framework structure shortens a magnetic loop formed when the voice coil is positioned in a magnetic gap, the voice coil is concentrated in the region with the densest magnetic field, the largest BL value can be obtained, the BL curve symmetry degree is good, the loudness of a product is improved, and the distortion of the product is reduced; the ball top is not easy to break due to the ball top reinforcing part, and the mechanical reliability of the product is improved; the voice coil framework and the FPC assembly maintain that the voice coil only moves in the Z direction, the vibration balance is good, and the pure sound effect of the loudspeaker is improved.

Description

Loudspeaker

Technical Field

The invention relates to the technical field of electroacoustic, in particular to a loudspeaker.

Background

At present, the miniature loudspeaker is a vibrating diaphragm, a ball top, a voice coil and an injection molding basin frame, and the Z-direction positioning of the voice coil and the adjustment of the vibration space of a product are realized in a glue bonding mode.

The design scheme of the loudspeaker is difficult to meet the market requirements of the existing loudspeaker such as large amplitude, high loudness, low distortion and good vibration balance, and the disadvantages of the design scheme are mainly shown in the following aspects.

1. In the case of a small product height, it is difficult to increase the product amplitude to an extreme level (e.g., 2.5mm product height, which is designed to be 0.65 mm);

2. the large-amplitude product needs a large vibration space to avoid collision of the product, so that the voice coil is difficult to concentrate in the most dense region of the magnetic field, and the maximum BL value cannot be obtained, so that the loudness of the product is not high enough;

3. the large-amplitude product needs a large vibration space to avoid the product from being knocked, so that the voice coil is difficult to be symmetrically arranged relative to the central pole piece, the BL curve symmetry is poor, and the product distortion is high.

Disclosure of Invention

The invention aims to overcome the defects of the traditional technology and provide the loudspeaker, wherein the position of the voice coil is fixed through the voice coil framework, so that the voice coil is positioned in a magnetic induction line dense area, and the amplitude, the loudness and the BL curve symmetry are improved.

The aim of the invention is achieved by the following technical measures:

a loudspeaker comprises a vibration system and a fixing system, wherein the vibration system comprises a vibration diaphragm and a voice coil assembly which is positioned below the vibration diaphragm and drives the vibration diaphragm to vibrate and sound, the voice coil assembly comprises a voice coil and a voice coil framework, the voice coil framework comprises a vibration diaphragm connecting part connected with the vibration diaphragm, a voice coil connecting part connected with the voice coil and a first extending part, one end of the first extending part is connected with the vibration diaphragm connecting part, the other end of the first extending part is connected with the voice coil connecting part, and one side, far away from the vibration diaphragm, of the voice coil connecting part is connected with the upper surface of one end, close to the vibration diaphragm;

the first extending part is positioned on the inner side of the vibrating diaphragm connecting part, and the voice coil connecting part is positioned on the inner side of the first extending part;

the first extension part enables the voice coil to have the height far away from the Z-axis direction of the diaphragm;

the included angle between the first extending part and the voice coil connecting part is 70-110 degrees.

As an improvement: the voice coil is in a rectangular shape with 4R corners, and the voice coil framework comprises a long shaft side or/and a short shaft side.

As an improvement: the method is characterized in that: be equipped with the ball top on the vibrating diaphragm, the voice coil loudspeaker voice coil skeleton passes through vibrating diaphragm connecting portion are connected with the ball top, the outside extension in edge of vibrating diaphragm connecting portion forms ball top rib, ball top rib sets up in the major axis limit or/and minor axis limit of vibrating diaphragm connecting portion, each vibrating diaphragm connecting portion set up 1 at least ball top rib.

As an improvement: the quantity of voice coil skeleton is 1 at least, the voice coil skeleton is symmetrical structure or symmetry setting.

As an improvement: the vibration system is characterized by further comprising a supporting piece located on the short shaft edge of the voice coil, the supporting piece is located below the voice coil, one end of the supporting piece is connected with the fixing system, the other end of the supporting piece is connected with the voice coil framework, the supporting piece comprises a Flexible Printed Circuit (FPC), and the FPC is electrically connected with the voice coil.

As an improvement: the fixing system comprises an annular pole piece, one end of the supporting piece is connected with the annular pole piece, and the other end of the supporting piece is connected with the voice coil framework.

As an improvement: the supporting piece further comprises an auxiliary film, the auxiliary film is stacked below the Flexible Printed Circuit (FPC), one end of the auxiliary film is connected with the fixing system, and the other end of the auxiliary film is connected with the voice coil framework.

As an improvement: the voice coil framework further comprises a second extending portion connected with the supporting portion, the second extending portion is arranged on the outer side of the vibrating diaphragm connecting portion, one end of the second extending portion is connected with the vibrating diaphragm connecting portion, the other end of the second extending portion extends along the direction far away from the vibrating diaphragm, and the other end of the second extending portion is connected with the supporting portion.

As an improvement: the voice coil framework comprises 4R angle structures, the 4R angle structures are in one-to-one correspondence with the 4R angle positions of the voice coil, and the second extending portion is located on the R angle of the diaphragm connecting portion.

As an improvement: the quantity of voice coil skeleton is four, the shape of voice coil loudspeaker voice coil is the rectangle that has 4R angles, four the voice coil loudspeaker voice coil skeleton symmetry respectively sets up corresponding to 4R angular positions of voice coil loudspeaker voice coil.

As an improvement: the voice coil is arranged in an up-and-down symmetrical mode relative to a central horizontal plane of the central pole piece.

The design scheme of the loudspeaker in the application can meet the market demands of large amplitude, high loudness, low distortion, difficult fracture of the dome, good vibration balance and good heat dissipation of the existing loudspeaker, and the advantages of the loudspeaker are mainly shown in the following aspects.

1. The vibrating diaphragm connecting part, the first extending part and the voice coil connecting part are arranged in a step-shaped structure, the first extending part is located on the inner side of the vibrating diaphragm connecting part, the voice coil connecting part is located on the inner side of the first extending part, the voice coil framework structure is arranged to increase the radiation area SD of the ball top, and the sensitivity of a product is improved.

2. The voice coil framework is connected with the upper surface of one end, close to the vibrating diaphragm 1, of the voice coil 4 through one side, far away from the vibrating diaphragm 1, of the voice coil connecting part 310, so that a magnetic loop formed when the voice coil is located in a magnetic gap is shortened, and the BL value of a product is increased.

3. The edge of vibrating diaphragm connecting portion outwards extends and forms the dome rib, the dome rib is connected with the dome for the difficult fracture that takes place of dome part in the voice coil loudspeaker voice coil outside region has promoted the mechanical reliability of product.

4. The first extension part enables the vibrating diaphragm connecting part and the voice coil connecting part to have Z-axis height H, the voice coil is provided with height H far away from the Z-axis direction of the vibrating diaphragm, and the voice coil is arranged in an up-and-down symmetrical mode relative to a horizontal plane of the center of the central pole piece, so that the voice coil is inserted into the magnetic gap and is concentrated in the region with the most dense magnetic field as much as possible, the maximum BL value is obtained, the symmetry degree of a BL curve is good, the loudness of a product is improved, and the distortion of the product is reduced.

5. The voice coil framework is supported and fixed through the flexible circuit board FPC and the auxiliary membrane, so that the voice coil is supported and fixed, the voice coil is maintained to move only in the Z direction, the vibration balance is good, the voice coil is not easy to touch a magnetic circuit system, and the pure sound effect of the loudspeaker is improved.

The invention is further described with reference to the following figures and detailed description.

Drawings

Fig. 1 is an exploded view of a loudspeaker according to the present invention.

Fig. 2 is a schematic view of the internal structure of a loudspeaker according to the present invention.

Fig. 3 is a schematic structural diagram of a voice coil bobbin in a speaker according to embodiment 1 of the present invention.

Fig. 4 is a schematic structural view of section a-a in fig. 3.

Fig. 5 is an enlarged schematic view of a portion B of fig. 4.

Fig. 6 is a schematic structural diagram of an annular pole piece in a loudspeaker according to the present invention.

Fig. 7 is a schematic structural diagram of a Flexible Printed Circuit (FPC) in a speaker according to the present invention.

Fig. 8 is a schematic structural view of an auxiliary membrane in a loudspeaker according to the present invention.

Fig. 9 is a schematic structural diagram of a voice coil bobbin in a speaker according to embodiment 2 of the present invention.

Fig. 10 is a schematic structural view of section E-E in fig. 7.

Fig. 11 is an enlarged schematic view of a portion F of fig. 8.

Fig. 12 is a schematic structural view of a voice coil bobbin in a speaker according to embodiment 3 of the present invention.

Fig. 13 is a schematic structural view of section E-E in fig. 10.

Fig. 14 is an enlarged schematic view of a portion F of fig. 10.

Fig. 15 is a BL test chart comparing a speaker of the present invention with a conventional speaker.

Fig. 16 is a graph of BL test for a comparison of a loudspeaker of the present invention and a conventional loudspeaker.

In the figure: 1-a vibrating diaphragm; 2-a dome; 3-voice coil framework; 310-a voice coil connection; 320-diaphragm connection part; 331-a first dome stiffener; 332-a second dome stiffener; 333-a third summit reinforcement; 334-a fourth dome stiffener; 341-first support portion; 342-a second support; 343-a third support; 344-a fourth support; 350-a first extension; 360-a second extension; 4-a voice coil; 5-flexible circuit board FPC; 6-auxiliary membrane; 610-a first fixed part; 611-a second fixed part; 621-a first auxiliary membrane hinge portion; 622-second auxiliary membrane hinge portion; 623-a third auxiliary membrane loop part; 624-a fourth auxiliary membrane hinge portion; 7-a basin stand; 8-ring-shaped pole piece; 9-a central pole piece; 10-central magnetic steel; 11-side magnetic steel; 12-magnetic shield.

Detailed Description

Example 1: as shown in fig. 1 and 2, a loudspeaker includes a fixing system and a vibrating system. The fixing system comprises a basin frame 7 with an accommodating space and a magnetic circuit system accommodated in the basin frame 7 and used for driving the vibration system, the magnetic circuit system comprises a magnetic cover 12 and magnetic steel arranged on the magnetic cover 12, the magnetic steel comprises central magnetic steel 10 and edge magnetic steel 11 arranged on two sides of the central magnetic steel 10, and a magnetic gap is formed between the central magnetic steel 10 and the edge magnetic steel 11. The magnetic circuit system further comprises an annular pole piece 8 and a central pole piece 9, and the central pole piece 9 is bonded to the central magnetic steel 10. The annular pole piece 8 is in a flat plate shape with a through hole. The pot frame 7 is a hollow rectangle, and the annular pole piece 8 is fixedly held on the pot frame 7 and is overlapped on the side magnetic steel 11.

The vibration system comprises a diaphragm 1 and a voice coil assembly. The vibrating diaphragm 1 comprises an edge part connected with the basin frame 7, a folded ring part and a ball top 2, the ball top 2 is arranged at the central position of the vibrating diaphragm 1, and metal, alloy or aluminum + PMI + aluminum composite material can be selected for the material of the ball top 2. Voice coil loudspeaker voice coil subassembly includes voice coil loudspeaker voice coil skeleton 3 and voice coil loudspeaker voice coil 4, voice coil loudspeaker voice coil 4 is located the below and the drive of vibrating diaphragm 1 vibration sound production of vibrating diaphragm, voice coil loudspeaker voice coil 4 inserts in the magnetic gap, the whole shape of voice coil loudspeaker voice coil is the rectangle structure that has 4R angles. Voice coil 4 includes a pair of major axis limit and a pair of minor axis limit, voice coil 4 presss from both sides and locates between vibrating diaphragm 1 and the support piece, voice coil 4 includes the voice coil lead wire of outside extension. The voice coil 4 comprises an upper surface close to the diaphragm 1, a lower surface far away from the diaphragm 1 and a side surface connecting the upper surface and the lower surface.

In this embodiment, as shown in fig. 3, 4 and 5, the voice coil bobbin 3 may be made of metal or PI, the number of the voice coil bobbins 3 is one, the voice coil bobbin 3 is a rectangular structure having 4R corners in a cross-sectional shape, and the voice coil bobbin 3 includes a pair of long axis sides and a pair of short axis sides. Voice coil loudspeaker voice coil skeleton 3 includes the vibrating diaphragm connecting portion 320 of being connected with the vibrating diaphragm, the voice coil loudspeaker voice coil connecting portion 310 and the first extension 350 of being connected with voice coil loudspeaker voice coil 4, first extension 350 one end is connected with vibrating diaphragm connecting portion 320, the first extension 350 other end is connected with voice coil loudspeaker voice coil connecting portion 310, one side that vibrating diaphragm 1 was kept away from to voice coil loudspeaker voice coil connecting portion 310 is close to the upper surface connection of vibrating diaphragm 1 one end with voice coil loudspeaker voice coil 4 for the magnetic circuit when voice coil loudspeaker voice coil 4 was located the magnetic gap shortens, increases the BL value of product.

The first extension portion 350 is located inside the diaphragm connecting portion 320, the voice coil connecting portion 310 is located inside the first extension portion 350, and in practical applications, the voice coil connecting portion 310 may also be located inside the first extension portion 350. This voice coil loudspeaker voice coil skeleton structural design mode has increased the radiating area (SD) of ball top, has promoted the sensitivity of product.

The first extending portion 350 is vertically connected with the voice coil connecting portion 310, an included angle C between the first extending portion 350 and the voice coil connecting portion 310 is 90 degrees, the first extending portion 350 is vertically connected with the vibrating diaphragm connecting portion 320, an included angle D between the first extending portion 350 and the vibrating diaphragm connecting portion 320 is 90 degrees, the vibrating diaphragm connecting portion 320 and the voice coil connecting portion 310 are enabled to have a Z axial height H, the voice coil 4 is far away from the height H in the Z axial direction of the vibrating diaphragm 1, the voice coil 4 is enabled to be vertically symmetrically arranged relative to a horizontal plane of the center of the central pole piece 9, the voice coil 4 is inserted into the magnetic gap and is concentrated in a magnetic field most dense area as much as possible, a maximum BL value is obtained, the BL curve symmetry degree is enabled to be good.

The Z-axis direction as defined in the present invention refers to a direction parallel to the motion of the voice coil.

The diaphragm connecting portion 320 is connected to the dome 2 at the center of the diaphragm 1, the edge of the diaphragm connecting portion 320 extends outward to form a dome reinforcing portion, and the dome reinforcing portion is located on four sides of the diaphragm connecting portion 320.

Specifically, in this embodiment, the number of the dome reinforcements is 4, that is, each edge of the diaphragm connecting portion 320 is provided with one dome reinforcement, and the dome reinforcements include a first dome reinforcement 331, a second dome reinforcement 332, a third dome reinforcement 333, and a fourth dome reinforcement 334, where the first dome reinforcement 331, the second dome reinforcement 332, the third dome reinforcement 333, and the fourth dome reinforcement 334 are disposed outside the diaphragm connecting portion 320, and the four dome reinforcements and the four edges of the diaphragm connecting portion 320 are disposed in one-to-one correspondence.

The edge of the diaphragm connecting part 320 extends outwards to form a ball top reinforcing part, and the ball top reinforcing part is connected with the ball top 2, so that the ball top part of the outer area of the voice coil 4 is not easy to break, and the mechanical reliability of the product is improved.

Vibration system still including being located the support piece on voice coil loudspeaker voice coil 4 minor axis limit, support piece set up in the minor axis limit position department and the elastic support of voice coil loudspeaker voice coil 4, support piece is located the below of voice coil loudspeaker voice coil 4, support piece's one end with fixing system is fixed, the other end with the voice coil loudspeaker voice coil skeleton is connected fixedly. In the present embodiment, the support member includes a flexible circuit board FPC5 (flexible circuit board FPC, i.e., a flexible circuit board) and an auxiliary film 6, and the flexible circuit board FPC5 is electrically coupled with the lead wires of the voice coil 4.

The voice coil bobbin 3 further includes a second extending portion 360 connected to the supporting member, the second extending portion 360 is disposed outside the diaphragm connecting portion 320, one end of the second extending portion 360 is connected to the diaphragm connecting portion 320, the other end of the second extending portion 360 extends in a direction away from the diaphragm, and the other end of the second extending portion 360 is connected to the supporting portion.

The number of the second extending portions 360 is four, and the four second extending portions 360 are arranged corresponding to the four R corners of the diaphragm connecting portion 320.

The other end of the second extension portion 360 is provided with a connection portion connected to the support portion, and the connection portion includes a first support portion 341, a second support portion 342, a third support portion 343, and a fourth support portion 344, and the four support portions are arranged in one-to-one correspondence with the four second extension portions 360.

As shown in fig. 6, 7 and 8, the fixing system includes the annular pole piece 8, one end of the flexible printed circuit FPC is fixedly connected to the annular pole piece 8, and the other end is fixedly connected to the supporting portion. On the one hand, flexible circuit board FPC5 supports fixedly voice coil skeleton 3 to play the support and fix voice coil 4's effect, on the other hand flexible circuit board FPC with voice coil 4's voice coil lead connection plays electric connection voice coil 4's effect.

Assist the membrane 6 and fold the below of locating flexible circuit board FPC5, flexible circuit board FPC5 sets up between connecting portion and assistance membrane 6, assist the one end fixed connection of membrane 6 fixed system promptly annular pole piece 8, other end fixed connection connecting portion, as shown in fig. 8, assist membrane 6 and include the first fixed part 610 of being connected with fixed system, the second fixed part 611 of being connected with connecting portion and be connected the supplementary membrane book ring portion of first fixed part 610 and second fixed part 611, it includes that first supplementary membrane book ring portion 621, second supplementary membrane book ring portion 622, third supplementary membrane book ring portion 623 and fourth supplementary membrane book ring portion 624 to assist membrane book ring portion. The auxiliary membrane 6 further supports and fixes the voice coil bobbin 3, thereby playing a role in further supporting and fixing the voice coil 4.

The voice coil framework 3 is supported and fixed through the flexible circuit board FPC5 and the auxiliary membrane 6, so that the voice coil 4 is supported and fixed, the voice coil 4 is maintained to move only in the Z direction, the vibration balance is good, the voice coil 4 is not easy to touch a magnetic circuit system, and the pure sound effect of the loudspeaker is improved.

Fig. 15 is a BL test chart comparing the product of this embodiment with a speaker using a conventional voice coil, and fig. 16 is a BL test chart comparing these. The BL symmetry of the product of the invention is obviously better than that of a loudspeaker adopting a conventional voice coil, the maximum BL value of the product of the invention is higher than that of the traditional loudspeaker, and the comprehensive performance is obviously improved.

Example 2: this embodiment is basically the same as example 1, except that:

as shown in fig. 9, 10 and 11, the number of the voice coil bobbins 3 is two, in this embodiment, each of the voice coil bobbins 3 includes a pair of long axis sides and 2R corners located at two ends of the long axis side, and the voice coil bobbins 3 are symmetrically disposed at positions of the pair of long axis sides of the voice coil 4. The voice coil bobbin 3 includes a pair of short axis sides and 2R corners at both ends of the short axis sides, which are similar to those of the embodiment and will not be described.

The included angle C between the first extending portion 350 and the voice coil connecting portion 310 is 70 °, and the included angle D between the first extending portion 350 and the diaphragm connecting portion 320 is 70 °. The first extension portion 350 enables the diaphragm connecting portion 320 and the voice coil connecting portion 310 to have a Z-axis height H', the voice coil 4 is arranged in an up-down symmetrical manner relative to a horizontal plane of the center of the central pole piece 9, and the voice coil 4 is inserted into the magnetic gap and is concentrated in a region with the most dense magnetic field as much as possible, so that the maximum BL value is obtained, the symmetry degree of a BL curve is good, the loudness of a product is improved, and the distortion of the product is reduced.

The edge of the diaphragm connecting portion 320 extends outward to form a dome reinforcing portion, and the dome reinforcing portion is disposed on a pair of long axis sides of the diaphragm connecting portion 320.

Specifically, in this embodiment, the number of the dome reinforcements is 4, 2 dome reinforcements are provided on each edge of the diaphragm connecting portion 320, the 4 dome reinforcements are a first dome reinforcement 331, a second dome reinforcement 332, a third dome reinforcement 333, and a fourth dome reinforcement 334, the first dome reinforcement 331 and the third dome reinforcement 333 are provided outside the diaphragm connecting portion 320, the first dome reinforcement 331 and the second dome reinforcement 332 are symmetrically provided on one long axis side of the diaphragm connecting portion 320, and the third dome reinforcement 333 and the fourth dome reinforcement 334 are symmetrically provided on the other long axis side of the diaphragm connecting portion 320.

Example 3: as shown in fig. 2, a loudspeaker includes a fixing system and a vibration system. The fixing system comprises a basin frame 7 with an accommodating space and a magnetic circuit system which is accommodated in the basin frame 7 and drives the vibration system, the magnetic circuit system comprises a magnetic cover 12 and magnetic steel arranged in the magnetic cover 12, the magnetic steel comprises central magnetic steel 10 and edge magnetic steel 11 arranged on two sides of the central magnetic steel 10, and a magnetic gap is formed between the central magnetic steel 10 and the edge magnetic steel 11. The magnetic circuit system further comprises an annular pole piece 8 and a central pole piece 9, and the central pole piece 9 is bonded to the central magnetic steel 10. The ring-shaped pole piece 8 is a flat plate with a through hole, the basin frame 7 is a hollow rectangle as a whole, and the ring-shaped pole piece 8 is fixedly held on the basin frame 7 and is overlapped on the side magnetic steel 11.

The vibration system comprises a diaphragm 1 and a voice coil assembly. The vibrating diaphragm 1 comprises an edge part connected with the basin frame 7, a folded ring part and a ball top 2, the ball top 2 is arranged at the central position of the vibrating diaphragm 1, and metal, alloy or aluminum + PMI + aluminum composite material can be selected for the material of the ball top 2. Voice coil loudspeaker voice coil subassembly includes voice coil loudspeaker voice coil skeleton 3 and voice coil loudspeaker voice coil 4, voice coil loudspeaker voice coil 4 is located the below and the drive of vibrating diaphragm 1 vibration sound production of vibrating diaphragm, voice coil loudspeaker voice coil 4 inserts in the magnetic gap, the whole shape of voice coil loudspeaker voice coil is the rectangle structure that has 4R angles. Voice coil 4 includes a pair of major axis limit and a pair of minor axis limit, voice coil 4 presss from both sides and locates between vibrating diaphragm 1 and the support piece, voice coil 4 includes the voice coil lead wire of outside extension. The voice coil 4 comprises an upper surface close to the diaphragm 1, a lower surface far away from the diaphragm and a side surface connecting the upper surface and the lower surface.

In this embodiment, as shown in fig. 12, 13 and 14, the number of the voice coil bobbins 3 is four, the voice coil bobbin 3 includes 4R-angle structures, and the 4R-angle structures are arranged in one-to-one correspondence with the 4R-angle positions of the voice coil 4. The voice coil framework 3 can be made of metal or PI. Voice coil skeleton 3 includes vibrating diaphragm connecting portion 320, the voice coil connecting portion 310 and the first extension 350 that are connected with voice coil 4 that are connected with the vibrating diaphragm, first extension 350 one end is connected with vibrating diaphragm connecting portion 320, the first extension 350 other end is connected with voice coil connecting portion 310, one side that vibrating diaphragm 1 was kept away from to voice coil connecting portion 310 is close to the upper surface connection of vibrating diaphragm 1 one end with voice coil 4.

The first extension portion 350 is located inside the diaphragm connecting portion 320, and the voice coil connecting portion 310 is located inside the first extension portion 350. This voice coil loudspeaker voice coil skeleton texture sets up the radiating area (SD) that has increased the ball top, has promoted the sensitivity of product.

The included angle C between the first extending portion 350 and the voice coil connecting portion 310 is 110 °, and the included angle D between the first extending portion 350 and the diaphragm connecting portion 320 is 110 °. The first extension portion 350 enables the diaphragm connecting portion 320 and the voice coil connecting portion 310 to have a height H ″ in the Z-axis direction, the voice coil 4 has a height H far away from the Z-axis direction of the diaphragm 1, the voice coil 4 is arranged in an up-down symmetrical manner relative to a horizontal plane of the center of the central pole piece 9, and the voice coil 4 is inserted into the magnetic gap and is concentrated in the region with the most dense magnetic field as much as possible, so that the maximum BL value is obtained, the symmetry degree of a BL curve is good, the loudness of a product is improved, and the distortion of the product is reduced.

The vibration system is still including the support piece that is located voice coil loudspeaker voice coil minor axis limit, support piece set up in the minor axis limit position department and the elastic support of voice coil loudspeaker voice coil 4, support piece is located the below of voice coil loudspeaker voice coil 4, support piece's one end with fixing system is fixed, the other end with the voice coil loudspeaker voice coil skeleton is connected fixedly. In the present embodiment, the support member includes a flexible circuit board FPC5 (flexible circuit board FPC, i.e., a flexible circuit board) and an auxiliary film 6, and the flexible circuit board FPC5 is electrically coupled with the lead wires of the voice coil 4.

The voice coil framework 3 is supported and fixed through the flexible circuit board FPC5 and the auxiliary film 6, so that the voice coil 4 is supported and fixed, the voice coil 4 is maintained to move only in the Z direction, the vibration balance is good, the voice coil is not easy to hit a magnetic circuit system, and the pure sound effect of the loudspeaker is improved.

Although several embodiments of the present invention have been described in detail, the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. The utility model provides a loudspeaker, its includes vibration system, vibration system includes vibrating diaphragm (1) and is located vibrating diaphragm (1) below drive the voice coil loudspeaker voice coil subassembly of vibrating diaphragm (1) vibration sound production, the voice coil loudspeaker voice coil subassembly includes voice coil loudspeaker voice coil (4) and voice coil loudspeaker voice coil skeleton (3), its characterized in that: the voice coil framework (3) comprises a vibrating diaphragm connecting part (320) connected with the vibrating diaphragm (1), a voice coil connecting part (310) connected with the voice coil (4) and a first extending part (350), one end of the first extending part (350) is connected with the vibrating diaphragm connecting part (320), the other end of the first extending part (350) is connected with the voice coil connecting part (310), and one side, far away from the vibrating diaphragm (1), of the voice coil connecting part (310) is connected with the upper surface of one end, close to the vibrating diaphragm (1), of the voice coil (4);

the first extending portion (350) is located on the inner side of the diaphragm connecting portion (320), the voice coil (4) is enabled to have the height in the Z-axis direction away from the diaphragm (1) through the first extending portion (350), and the included angle between the first extending portion (350) and the voice coil connecting portion is 70-110 degrees.

2. The loudspeaker of claim 1, wherein: the shape of the voice coil (4) is a rectangle with 4R corners, and the voice coil framework (3) comprises a long shaft side or/and a short shaft side.

3. The loudspeaker of claim 2, wherein: be equipped with ball top (2) on vibrating diaphragm (1), voice coil loudspeaker voice coil skeleton (3) are passed through vibrating diaphragm connecting portion (320) are connected with ball top (2), the outside extension in edge of vibrating diaphragm connecting portion (320) forms ball top rib, ball top rib sets up in the major axis limit or/and minor axis limit of vibrating diaphragm connecting portion (320), each vibrating diaphragm connecting portion (320) set up 1 at least ball top rib.

4. The loudspeaker of claim 2, wherein: the number of voice coil framework (3) is 1 at least, voice coil framework (3) are symmetrical structure or symmetry setting.

5. The loudspeaker of claim 1, wherein: the vibration system is still including being located the support piece on voice coil loudspeaker voice coil (4) minor axis limit, support piece is located the below of voice coil loudspeaker voice coil (4), support piece's one end and fixed system are connected, the other end with voice coil loudspeaker voice coil skeleton (3) are connected, support piece includes flexible circuit board FPC (5), flexible circuit board FPC (5) with voice coil loudspeaker voice coil (4) electric connection.

6. The loudspeaker of claim 5, wherein: the fixing system comprises an annular pole piece (8), one end of the supporting piece is connected with the annular pole piece (8), and the other end of the supporting piece is connected with the voice coil framework (3).

7. The loudspeaker of claim 5, wherein: the supporting piece further comprises an auxiliary membrane (6), the auxiliary membrane (6) is arranged below the Flexible Printed Circuit (FPC) (5) in a stacked mode, one end of the auxiliary membrane (6) is connected with the fixing system, and the other end of the auxiliary membrane is connected with the voice coil framework (3).

8. The loudspeaker of claim 5, wherein: voice coil loudspeaker voice coil skeleton (3) still include with second extension (360) that support piece is connected, second extension (360) set up in vibrating diaphragm connecting portion (320) outside, second extension (360) one end is connected with vibrating diaphragm connecting portion (320), the other end of second extension (360) extends along the direction of keeping away from vibrating diaphragm (1), the second extension (360) other end is connected with support piece.

9. The loudspeaker of claim 8, wherein: the voice coil framework (3) comprises 4R angle structures, the 4R angle structures are arranged in one-to-one correspondence with the 4R angle positions of the voice coil (4), and the second extending portion (360) is located on the R angle of the diaphragm connecting portion (320).

10. A loudspeaker according to any one of claims 1 to 9, wherein: the voice coil loudspeaker further comprises a magnetic circuit system, wherein the magnetic circuit system comprises central magnetic steel (10) and edge magnetic steel (11) arranged on two sides of the central magnetic steel (10), a magnetic gap is formed between the central magnetic steel (10) and the edge magnetic steel (11), a central pole piece (9) is arranged on the central magnetic steel (10), and the voice coil (4) is located in the magnetic gap and is arranged in an up-and-down symmetrical mode relative to a central horizontal plane of the central pole piece (9).