阅读说明：本技术 一种扬声器 (Loudspeaker ) 是由 刘海峰 毕文达 于 2019-11-04 设计创作，主要内容包括：本发明公开了一种扬声器,包括振动系统,所述振动系统包括振膜和音圈组件,所述音圈组件包括音圈和音圈骨架,所述音圈骨架包括与振膜连接部、音圈连接部和第一延长部,所述第一延长部一端与振膜连接部连接、所述第一延长部另一端与音圈连接部连接,所述第一延长部使音圈具有远离振膜的Z轴方向的高度。本发明球顶辐射面积SD大,灵敏度高；特殊音圈骨架结构使音圈位于磁间隙时所形成的磁回路缩短,音圈集中于磁场最密集区域,能够获取最大BL值且使BL曲线对称度较好,提升产品的响度、降低产品的失真；球顶加强部使得球顶不易发生断裂,提升了产品的机械可靠性；音圈骨架与FPC组件维持音圈只在Z方向运动,振动平衡性较好,提高扬声器的纯音效果。(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.)

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: 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 FPC (5), 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: support piece is still including assisting membrane (6), it locates to assist membrane (6) fold FPC (5) below, assist membrane (6) one end with fixed system connects, the other end with voice coil loudspeaker voice coil skeleton (3) are connected.

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).

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: vibration system still is including being located the support piece on voice coil loudspeaker voice coil minor axis limit, support piece is located the below of voice coil loudspeaker voice coil, support piece's one end with fixed system connects, the other end with voice coil loudspeaker voice coil skeleton connects, support piece includes FPC, FPC with voice coil loudspeaker voice coil electric connection.

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 support piece further comprises an auxiliary membrane, the auxiliary membrane is stacked below the FPC, one end of the auxiliary membrane is connected with the fixing system, and the other end of the auxiliary membrane 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 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 view of the structure of the FPC in the speaker of 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-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