Loudspeaker assembly

Abstract

Disclosed is a speaker assembly including: a magnetic circuit unit defining a magnetic gap and including a yoke and a magnet, the yoke including a yoke bottom located below the magnet and a yoke sidewall extending upward from the yoke bottom on a radially outer side of the magnet; the vibration unit comprises a vibrating diaphragm and a voice coil, one end of the voice coil is connected to the vibrating diaphragm, the other end of the voice coil is suspended in the magnetic gap, and the voice coil is in a runway shape and is provided with two arc edges protruding outwards in the radial direction and two straight edges; the support is respectively connected with the magnetic circuit unit and the vibration unit, the magnet yoke side walls comprise two first magnet yoke side walls respectively corresponding to arc edges of the voice coil, and the first magnet yoke side walls are opposite to each other and are respectively provided with arc-shaped contours protruding outwards in the radial direction. Compared with a traditional product, the low-cost miniature loudspeaker assembly provided by the utility model has the advantage that the sensitivity is obviously improved.

Description

Technical Field

[0001] The utility model relates to a loudspeaker assembly, and more particularly to a miniature loudspeaker assembly. Background Art

[0002] Microspeakers have been widely used in various compact electronic products such as mobile phones, tablets, laptops, and wearable devices.

[0003] The speaker converts electrical energy into sound. The structure of existing ultra-thin speaker components typically includes a diaphragm, a magnetic circuit with a magnetic gap, and a voice coil. The magnetic circuit structure can concentrate the magnetic flux generated by the magnet into the magnetic gap. When electrical energy flows into the voice coil, an induced magnetic field that interacts with the magnetic flux in the magnetic gap can be generated. The voice coil can carry a current in a direction substantially perpendicular to the direction of the magnetic flux generated by the magnet, so that the interaction between the voice coil current and the magnetic flux can cause the voice coil to oscillate linearly within the length of the magnetic gap, which moves the diaphragm to produce audible sound.

[0004] As electronic products develop towards high performance, the market has higher and higher cost requirements for speaker components. Specifically, speaker components are required to have higher output sensitivity without increasing costs; micro speakers are required to reduce costs while meeting consumer needs. Traditional micro speakers are relatively low-cost and meet the sound requirements of common usage scenarios. However, due to the extreme cost demands of existing low-cost micro speakers, end customers often complain about their poor sound quality.

[0005] Therefore, there is a need for a speaker assembly or a micro speaker that can at least partially solve the above problems, allowing the micro speaker to increase BL and increase Sd while maintaining low cost, thereby improving sensitivity, so that consumers can obtain a good sound experience. Utility Model Content

[0006] The present invention aims to overcome at least some of the above problems in the prior art.

[0007] According to one aspect of the utility model, there is provided a speaker assembly, comprising:

[0008] a magnetic circuit unit defining a magnetic gap and including a yoke and a magnet, the yoke including a yoke bottom located below the magnet and a yoke sidewall extending upward from the yoke bottom on a radially outer side of the magnet;

[0009] A vibration unit, comprising a diaphragm and a voice coil, wherein one end of the voice coil is connected to the diaphragm and the other end is suspended in the magnetic gap, and the voice coil is formed in a racetrack shape and has two arc edges protruding radially outward and two straight edges;

[0010] A bracket is connected to the magnetic circuit unit and the vibration unit respectively,

[0011] The yoke side wall comprises two first yoke side walls respectively corresponding to arc edges of the voice coil, the first yoke side walls are opposite to each other and respectively have an arc-shaped profile protruding radially outward.

[0012] In one or more embodiments of the present invention, the arc-shaped profile of each first yoke side wall is the same as the profile of the corresponding arc edge of the voice coil.

[0013] In one or more embodiments of the present invention, the yoke side wall also includes two flat second yoke side walls opposite to each other, and a gap is separated between the first yoke side wall and the adjacent second yoke side wall, wherein the yoke also includes a plurality of positioning mechanisms for positioning the magnetic circuit unit on the bracket, and the positioning mechanisms are arranged to protrude outward from the bottom of the yoke at the gap.

[0014] In one or more embodiments of the present invention, the gap corresponds to a transition area between an arc edge and a straight edge of the voice coil.

[0015] In one or more embodiments of the present invention, each positioning mechanism comprises an oblique section protruding radially outward from the bottom of the yoke and from the gap, and the oblique section is configured to extend obliquely relative to the normal direction of the straight side of the voice coil.

[0016] In one or more embodiments of the present invention, each positioning mechanism further comprises a straight section adjacent to the outer end of the oblique section and extending along the normal direction of the straight side of the voice coil, wherein the straight section is connected to the bracket to achieve positioning of the magnetic circuit unit on the bracket.

[0017] In one or more embodiments of the present invention, the magnetic circuit unit further comprises a top plate arranged on the top surface of the magnet, and the top plate is provided with a notch in an edge region corresponding to the positioning mechanism along the axial direction.

[0018] In one or more embodiments of the present invention, the yoke side wall is a bent portion produced by bending, and the bottom of the bent portion has a rounded corner.

[0019] In one or more embodiments of the present invention, the diaphragm includes a diaphragm edge located radially outside the voice coil and a diaphragm center located radially inside the voice coil, the diaphragm edge has an upwardly protruding folding ring portion, and the folding ring portion has a radial inner edge extending in a circumferential manner in a square-like shape.

[0020] In one or more embodiments of the present invention, the center of the diaphragm has a sinking area, and the magnetic circuit unit further includes a top plate arranged on the top surface of the magnet, and the top plate has a central groove to match the sinking area. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A cross-sectional view of a speaker assembly according to one or more embodiments of the present invention is shown;

[0022] Figure 2 Shown in accordance with Figure 1 a partially exploded perspective view of a speaker assembly;

[0023] Figure 3 Shown in accordance with Figure 1 An exploded view of the speaker assembly;

[0024] Figure 4 Shows that according to Figure 1 An exploded view of a magnetic circuit unit in a speaker assembly;

[0025] Figure 5 Shown in accordance with Figure 1 An exploded view of the yoke and bracket in the speaker assembly;

[0026] Figure 6 Shows Figure 5 A partial schematic diagram of the yoke and the bracket in the assembled state;

[0027] Figure 7 Shows that according to Figure 1 A perspective view of a diaphragm in a loudspeaker assembly;

[0028] Figure 8 Shown in accordance with Figure 1 a cross-sectional view of a speaker assembly;

[0029] Fig. 9 A driving force conversion factor BL curve diagram of a loudspeaker assembly according to an embodiment of the utility model and a loudspeaker assembly of a comparative example is shown;

[0030] Fig.10 The frequency response curves of the loudspeaker assembly according to the embodiment of the present utility model and the loudspeaker assembly of the comparative example are shown. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The same or similar reference numerals in each figure represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In this document, the term "axis" refers to the central axis x of the loudspeaker assembly, the term "axial" or "axial direction" refers to the direction along the axis of the loudspeaker, the term "radial" or "radial direction" refers to the direction generally perpendicular to the axis, pointing to or away from the axis, the term "radially inside" or "radially inside" refers to a component, part, position or direction relatively close to the axis, and the term "radially outside" or "radially outside" refers to a component, part, position or direction relatively far from the axis. The terms "upper", "lower", "top" and "bottom" are relative to the axial direction, "upper" and "top" refer to a component, part, position or direction relatively close to or facing the vibration unit of the loudspeaker assembly in the axial direction, and "lower" and "bottom" refer to a component, part, position or direction relatively close to or facing the magnetic circuit unit of the loudspeaker assembly in the axial direction.

[0034] The utility model provides a loudspeaker assembly, comprising: a magnetic circuit unit, comprising a yoke, a magnet and a top plate, the yoke comprising a yoke bottom located below the magnet and a yoke side wall extending upward from the yoke bottom on the radial outer side of the magnet, the top plate being arranged on the top surface of the magnet, a magnetic gap being defined between the yoke side wall and the top plate; a vibration unit, comprising a diaphragm and a voice coil, one end of the voice coil being connected to the diaphragm and the other end being suspended in the magnetic gap, the voice coil being formed into a runway shape and having two arc edges protruding radially outward and two straight edges; a bracket, respectively connected to the magnetic circuit unit and the vibration unit, wherein the yoke side wall comprises two first yoke side walls respectively corresponding to the arc edges of the voice coil, the first yoke side walls being opposite to each other and respectively having an arc profile protruding radially outward.

[0035] According to the speaker assembly of the utility model, the voice coil is set to a runway shape, and the top plate and the magnet located radially inside the voice coil have a shape corresponding to the voice coil. By designing a special yoke, the first yoke side wall corresponding to the arc edge of the voice coil is set to have an arc profile, so that compared with the traditional yoke with four flat side walls, a narrower magnetic gap is formed between the yoke and the top plate, which can effectively increase the magnetic flux of the magnetic gap, thereby obtaining a higher driving force conversion factor BL, and improving the sensitivity of the low-cost micro speaker. In one or more embodiments of the utility model, the yoke side wall also includes two flat second yoke side walls opposite to each other, and a gap is separated between the first yoke side wall and the second yoke side wall, wherein the yoke also includes a positioning mechanism for positioning the yoke on the bracket, the positioning mechanism is configured to protrude outward from the bottom of the yoke at the gap and includes an oblique section protruding outward from the bottom of the yoke and out of the gap, and the oblique section is configured to extend obliquely relative to the normal of the straight side of the voice coil. By providing the positioning mechanism with the oblique section, compared with a conventional positioning mechanism including only a straight section, a larger arc length can be used to construct the first yoke side wall, thereby increasing the magnetic flux of the magnetic gap and effectively increasing the BL of the speaker assembly.

[0036] In one or more embodiments of the utility model, the diaphragm includes a diaphragm edge located radially outside the voice coil and a diaphragm center located radially inside the voice coil, the diaphragm edge has an upwardly protruding folding ring portion, and the folding ring portion has a radial inner edge extending in a quasi-square shape. Here, the quasi-square shape refers to a straight extension section and four rounded sections respectively adjacent to the two ends of the straight extension section on all four sides. By setting the folding ring portion in a quasi-square shape, the effective area Sd of the diaphragm is increased, the volume of air that can be pushed is larger, and the sensitivity of the low-cost micro speaker is further improved.

[0037] Figure 1 A cross-sectional view of a speaker assembly according to one or more embodiments of the present invention is shown; Figure 2 Shown in accordance with Figure 1 A partially exploded perspective view of a speaker assembly. Figure 3 Shown in accordance with Figure 1 Exploded view of the speaker assembly.

[0038] Combination Figures 1 to 3 It can be seen that the speaker assembly 100 is substantially rectangular and has an axis x. Figure 1 The cross-sectional view is obtained by cutting the middle area of ​​the speaker assembly 100 along the short side of the rectangle. The speaker assembly 100 includes a magnetic circuit unit 110, a bracket 140 and a vibration unit 150.

[0039] The magnetic circuit unit 110 includes a magnet 128 and a magnetic conductive member. The magnetic conductive member includes a yoke 126 and a top plate 138. The yoke 126 includes a yoke bottom 126a located below the magnet 128 and a yoke side wall extending upward from the yoke bottom 126a on the radial outer side of the magnet 128, and the yoke side wall includes two first yoke side walls 126c opposite to each other and two second yoke side walls 126b opposite to each other. Figure 1 Only the second yoke side wall 126b is shown in the cross-sectional view of FIG. Figure 2 The top plate 138 is disposed on the top surface of the magnet 128, and a magnetic gap 102 is defined between the yoke sidewalls and the top plate 138. The yoke 126 and the top plate 138 guide and concentrate the magnetic flux from the magnet 128 to pass through the magnetic gap 102. The bracket 140 is fixedly connected to the magnetic circuit unit 110.

[0040] The vibration unit 150 includes a diaphragm and a voice coil 180. Figure 1 In the embodiment shown, the diaphragm includes a center sticker 170 and a suspension edge 160, which are bonded together to form the diaphragm. In one or more other embodiments of the present invention, the diaphragm may also be designed as an integrally formed membrane. Figure 1 In the embodiment, one end of the voice coil 180 is connected to the middle sticker 170 , and the other end is suspended in the magnetic gap 102 .

[0041] The suspension 160 includes an outer suspension 162, a folded ring portion 164 and an inner suspension 166, wherein the outer suspension 162 is connected to the bracket 140, the inner suspension 166 is located radially inside the folded ring portion 164 and connected to the center post 170, and the folded ring portion 164 is between the outer suspension 162 and the inner suspension 166, allowing the inner suspension 166, the voice coil 180 and the center post 170 to move axially relative to the outer suspension 162, the bracket 140 and the magnetic circuit assembly 110.

[0042] The center sticker 170 includes a center sticker inner portion 172, a center sticker middle portion 174, and a center sticker outer portion 176. The center sticker middle portion 174 is axially arranged between the outer portion 162 of the suspension and the voice coil 180, with its top surface connected to the outer portion 162 of the suspension, and its bottom surface connected to the upper end surface of the voice coil 180, thereby connecting the outer portion 162 of the suspension, the voice coil 180, and the center sticker 170 together. The center sticker inner portion 172 is radially inside the voice coil 180, and the center sticker outer portion 176 is radially outside the voice coil 180.

[0043] from Figure 2It can be seen that the voice coil 180 is formed in a racetrack shape and has two arc edges protruding radially outward. The two first yoke side walls 126c opposite to each other have arc profiles protruding radially outward. Compared with the traditional yoke with four flat side walls, a narrower magnetic gap is formed between the first yoke side wall 126c and the top plate 138, which can effectively increase the magnetic flux of the magnetic gap, thereby obtaining a higher driving force conversion factor BL, and improving the sensitivity of the low-cost micro speaker.

[0044] It should be noted here that the arc line of the arc edge of the voice coil is not necessarily a circular arc line with only one curvature, but can also be composed of several circular arc lines with different curvatures, or a combination of one or more other arc lines such as a parabola and / or a hanging neck line that are not circular arc lines, or a combination of one or more circular arc lines and one or more non-circular arc parabolas and / or hanging neck lines.

[0045] The lower portion of the voice coil 180 is suspended in the magnetic gap 102 of the magnetic circuit assembly 110. When an audio signal passes through the lead 182 (shown in FIG. Figure 2 ) is transmitted to the voice coil 180, the magnetic field in the magnetic gap 102 generates a force on the audio signal current passing through the voice coil 180, and the force drives the voice coil 180 and then drives the middle sticker 170 and the inner part 166 of the suspension to vibrate axially, so that the speaker assembly 100 emits sound. Here, the outer part 176 of the middle sticker is located between the inner part 166 of the suspension and the voice coil 180. In one or more embodiments of the utility model, it can also be arranged that the inner part 166 of the suspension is located between the outer part 176 of the middle sticker and the voice coil 180. In one or more embodiments of the utility model, the voice coil 180 can be designed as a frameless voice coil or a framed voice coil.

[0046] Figure 4 Shows that according to Figure 1 FIG. 1 is an exploded view of the magnetic circuit unit 110 in the speaker assembly 100. As can be clearly seen from the figure, the yoke 126 includes: a yoke bottom 126a, two first yoke side walls 126c opposite to each other, two second yoke side walls 126b opposite to each other, and a positioning mechanism 124 for positioning the magnetic circuit unit 110 on the bracket 140. The yoke bottom 126a is arranged below the magnet 128, and the four yoke side walls extend upward from the yoke bottom 126a on the radial outer side of the magnet 128. A gap 126d is separated between the second yoke side wall 126b and the adjacent first yoke side wall 126c, and the positioning mechanism 124 protrudes outward from the yoke bottom 126a at the gap 126d.

[0047] In this embodiment, the arc profile of the first yoke side wall 126c is the same as the profile of the arc edge of the voice coil 180. It should be noted that the "same" here does not require absolute sameness, but can also be basically the same. With this design, the distance between the first yoke side wall 126c and the arc edge of the voice coil 180 remains basically unchanged along the extension direction of the arc edge, thereby increasing the magnetic flux of the magnetic gap, thereby obtaining a higher driving force conversion factor BL, and improving the sensitivity of the low-cost micro speaker.

[0048] In this embodiment, the gap 126d for arranging the positioning mechanism 124 corresponds to the transition area between the arc edge and the straight edge of the voice coil 180. This design is conducive to arranging the lead wire 182 of the voice coil 180, and at the same time makes it difficult for the yoke 126 to turn over, and the flatness of the speaker assembly 100 is better.

[0049] It should be noted here that the "transition area" refers to the transition area between the arc edge and the straight edge, which includes not only the intersection point between the straight edge and the arc edge, but also includes the partial arc edge of the voice coil close to the intersection point, or includes the partial straight edge of the voice coil close to the intersection point, or includes both the partial arc edge of the voice coil close to the intersection point and the partial straight edge of the voice coil close to the intersection point.

[0050] In one or more embodiments of the present invention, the gap 126 d and the positioning mechanism 124 may also be disposed at a position corresponding to the straight edge of the voice coil 180 .

[0051] In this embodiment, the positioning mechanism 124 includes an oblique section 124a protruding radially outward from the gap 126d from the bottom 126a of the yoke, and a straight section 124b adjacent to the outer end of the oblique section 124a. The oblique section 124a is configured to extend obliquely relative to the normal direction of the straight side of the voice coil, and the straight section 124b is configured to extend along the normal direction of the straight side of the voice coil 180. The straight section 124b is connected to the bracket 140 to achieve the positioning of the magnetic circuit unit 110 on the bracket 140 (see Figure 5 By setting the oblique section 124a of the positioning mechanism 124 to first extend obliquely and then extend vertically, it is helpful to reduce the space occupied by the gap 126d, so that a longer first yoke side wall 126c can be provided to define the magnetic gap 102, which is more conducive to improving the performance of the speaker assembly.

[0052] In this embodiment, the first yoke side wall 126c and the second yoke side wall 126b are both bent portions formed by bending, and the bottom of the bent portion has a rounded corner. The bending process can significantly reduce the manufacturing cost of the yoke side wall compared to other manufacturing processes such as welding.

[0053] from Figure 4It can be seen that the top plate 138 is provided with a notch 138a in the axial edge area corresponding to the positioning mechanism 124. The notch 138a is provided to help alleviate or avoid the phenomenon that air is not easy to pass through the magnetic gap after the magnetic fluid is added to the magnetic gap 102.

[0054] The top plate 138 also has a central groove 138b to align with the depressed area 170a (shown in FIG. Figure 5 The central groove 138b is configured as a through hole.

[0055] In one or more embodiments of the present invention, the central groove 138b may be configured as a thinned depression. In one or more embodiments of the present invention, the top plate 138 may not be provided with the central groove 138b.

[0056] Figure 5 Shown in accordance with Figure 1 An exploded view of the yoke 126 and the bracket 140 in the speaker assembly 100. The four yoke side walls of the yoke 126 are located below the yoke bottom 126a in the figure, and the four positioning mechanisms 124 extend in the same plane as the yoke bottom 126a. The bracket 140 has a runway-shaped hole 140c, four positioning posts 140a, and four mounting surfaces 140b for mounting the positioning mechanisms on the radial outside of the positioning posts 140a. The mounting surface 140b is set as a plane here, and the positioning posts 140a protrude axially from the mounting surface 140b, that is, extend upward in the plane of the figure. During assembly, the four yoke side walls of the yoke 126 are inserted axially downward into the hole 140c, and the four positioning mechanisms are installed at the corresponding mounting surfaces 140b to achieve radial positioning.

[0057] Figure 6 Shows Figure 5 A partial schematic diagram of the yoke 126 and the bracket 140 in the assembled state, in which only Figure 5 The upper left corner of the assembly of the yoke 126 and the bracket 140. It can be seen from the figure that the straight section 124b of the positioning mechanism 124 is installed on the mounting surface 140b of the bracket 140 and is clamped on the positioning column 140a on the inside, thereby realizing the positioning of the yoke 126 and the magnetic circuit unit 110 in the radial direction or horizontal direction. The mounting surface 140b is not visible here because it is blocked by the straight section 124b. Figure 6 It is also clearly shown that the oblique section 124a of the positioning mechanism 124 extends radially outward from the yoke bottom 126a at an angle relative to the normal direction of the straight side of the voice coil 180 in the transition area corresponding to the arc side and the straight side of the voice coil 180. The straight section 124b is arranged to extend along the normal direction of the straight side of the voice coil 180.

[0058] Figure 7 Shown in accordance with Figure 1A perspective view of a diaphragm in the speaker assembly 100. Figure 8 Shows that according to Figure 1 sectional view of the speaker assembly 100.

[0059] Combination Figure 7 and Figure 8 It can be seen that the diaphragm 160 includes an upwardly protruding surrounding ring portion 164, and the radial inner edge 164a of the ring portion extends in a surrounding manner in a square-like shape. By setting the radial inner edge 164a of the ring portion 164 to be a square-like shape, the effective area Sd of the diaphragm is increased, the volume of air that can be pushed is larger, and the sensitivity of the low-cost micro speaker is further improved.

[0060] The middle sticker 170 of the diaphragm has a sinking area 170a, which is aligned with the central groove 138b of the top plate 138 (shown in FIG. Figure 4 ) are compatible.

[0061] Fig. 9 A driving force conversion factor BL curve diagram of the speaker assembly 100 according to the embodiment of the present invention and a speaker assembly of a comparative example is shown. Fig.10 The frequency response curves of the loudspeaker assembly 100 according to the embodiment of the present invention and the loudspeaker assembly of a comparative example are shown. Figure 9-10 The embodiment and the comparative example are micro speakers with a length, width and height of 24*12*4.0 mm respectively, wherein Figure 9-10 The structure of the speaker assembly 100 of the embodiment is as follows Figure 1-Figure 8 The difference between the speaker assembly of the comparative example and the embodiment is that the four yoke side walls are all flat, which results in a larger gap between adjacent yoke side walls, and the positioning mechanism is only composed of a straight section extending in the normal direction along the straight side of the voice coil (i.e., the long side of the speaker), and the folding ring portion of the diaphragm is arranged to extend in a track-shaped surround, and the top plate is not provided with a central groove and a notch.

[0062] like Fig. 9 As shown, compared with the BL curve of the comparative example, the BL curve of the loudspeaker assembly according to the embodiment of the utility model has a higher BL value. Fig.10 As shown, compared with the frequency response curve of the comparative example, the speaker assembly according to the embodiment of the utility model has better frequency response in both low frequency band and high frequency band. The BL0 of the comparative example is 0.45, and the effective area Sd of the diaphragm is 1.78. The BL0 of the speaker assembly according to the embodiment of the utility model is 0.71, and the effective area Sd of the diaphragm is 2.01. Therefore, compared with the speaker of the traditional design, the speaker assembly according to the embodiment of the utility model brings a very huge sensitivity improvement, and its sensitivity is improved by about 3dB.

[0063] In one or more other embodiments of the present invention, the speaker may be a micro speaker of any suitable size, for example, a micro speaker of any suitable size with a length, width or diameter less than 60 mm and a height less than 10 mm or 5 mm.

[0064] The utility model can be implemented in the following ways:

[0065] Item 1: A speaker assembly, comprising:

[0066] a magnetic circuit unit defining a magnetic gap and including a yoke and a magnet, the yoke including a yoke bottom located below the magnet and a yoke sidewall extending upward from the yoke bottom on a radially outer side of the magnet;

[0067] A vibration unit, comprising a diaphragm and a voice coil, wherein one end of the voice coil is connected to the diaphragm and the other end is suspended in the magnetic gap, and the voice coil is formed in a racetrack shape and has two arc edges protruding radially outward and two straight edges;

[0068] A bracket is connected to the magnetic circuit unit and the vibration unit respectively,

[0069] The yoke side wall comprises two first yoke side walls respectively corresponding to arc edges of the voice coil, the first yoke side walls are opposite to each other and respectively have an arc-shaped profile protruding radially outward.

[0070] Item 2: The loudspeaker assembly according to Item 1, characterized in that the arc profile of each first yoke side wall is the same as the profile of the corresponding arc edge of the voice coil.

[0071] Item 3: A speaker assembly according to any one of Items 1 to 2, characterized in that the yoke side wall also includes two flat second yoke side walls opposite to each other, and a gap is separated between the first yoke side wall and the adjacent second yoke side wall, wherein the yoke also includes a plurality of positioning mechanisms for positioning the magnetic circuit unit on the bracket, and the positioning mechanisms are arranged to protrude outward from the bottom of the yoke at the gap.

[0072] Item 4: The loudspeaker assembly according to any one of Items 1 to 3, characterized in that the gap corresponds to a transition area between an arc edge and a straight edge of the voice coil.

[0073] Item 5: A loudspeaker assembly according to any one of Items 1 to 4, characterized in that each positioning mechanism includes an oblique section protruding radially outward from the gap from the bottom of the yoke, and the oblique section is configured to extend obliquely relative to the normal of the straight side of the voice coil.

[0074] Item 6: A speaker assembly according to any one of Items 1 to 5, characterized in that each positioning mechanism also includes a straight-out section adjacent to the outer end of the oblique section and extending along the normal of the straight side of the voice coil, and the straight-out section is connected to the bracket to achieve the positioning of the magnetic circuit unit on the bracket.

[0075] Item 7: The speaker assembly according to any one of Items 1 to 6, characterized in that the magnetic circuit unit also includes a top plate arranged on the top surface of the magnet, and the top plate is provided with a notch in an edge area corresponding to the positioning mechanism along the axial direction.

[0076] Item 8: The loudspeaker assembly according to any one of Items 1 to 7, characterized in that the yoke side wall is a bent portion produced by bending, and the bottom of the bent portion has a rounded corner.

[0077] Item 9: A speaker assembly according to any one of Items 1 to 8, characterized in that the diaphragm includes a diaphragm edge located radially outside the voice coil and a diaphragm center located radially inside the voice coil, the diaphragm edge has an upwardly protruding folding ring portion, and the folding ring portion has a radial inner edge extending in a circumferential manner in a square-like shape.

[0078] Item 10: A speaker assembly according to any one of Items 1 to 9, characterized in that the center of the diaphragm has a sinking area, and the magnetic circuit unit also includes a top plate arranged on the top surface of the magnet, and the top plate has a central groove to adapt to the sinking area.

[0079] The above is only an exemplary embodiment used to illustrate the principle of the utility model, and is not intended to limit the protection scope of the utility model. For ordinary technicians in this field, various modifications and improvements can be made without departing from the spirit and essence of the utility model, and these modifications and improvements are also within the protection scope of the utility model.

Claims

1. A speaker assembly, Features include: a magnetic circuit unit defining a magnetic gap and including a yoke and a magnet, the yoke including a yoke bottom located below the magnet and a yoke sidewall extending upward from the yoke bottom on a radially outer side of the magnet; A vibration unit, comprising a diaphragm and a voice coil, wherein one end of the voice coil is connected to the diaphragm and the other end is suspended in the magnetic gap, and the voice coil is formed in a racetrack shape and has two arc edges protruding radially outward and two straight edges; A bracket is connected to the magnetic circuit unit and the vibration unit respectively, The yoke side wall comprises two first yoke side walls respectively corresponding to arc edges of the voice coil, the first yoke side walls are opposite to each other and respectively have an arc-shaped profile protruding radially outward.

2. The loudspeaker assembly according to claim 1, It is characterized in that The arc-shaped profile of each first yoke side wall is the same as the profile of the corresponding arc-shaped edge of the voice coil.

3. The loudspeaker assembly according to claim 1, It is characterized in that The yoke side wall also includes two flat second yoke side walls opposite to each other, and a gap is separated between the first yoke side wall and the adjacent second yoke side wall, wherein the yoke also includes a plurality of positioning mechanisms for positioning the magnetic circuit unit on the bracket, and the positioning mechanisms are arranged to protrude outward from the bottom of the yoke at the gap.

4. The loudspeaker assembly according to claim 3, It is characterized in that The gap corresponds to a transition area between an arc edge and a straight edge of the voice coil.

5. The loudspeaker assembly according to claim 3, It is characterized in that Each positioning mechanism includes an oblique section protruding radially outward from the bottom of the yoke and out of the gap, and the oblique section is arranged to extend obliquely relative to the normal direction of the straight side of the voice coil.

6. The loudspeaker assembly according to claim 5, It is characterized in that Each positioning mechanism further comprises a straight section adjacent to the outer end of the oblique section and extending along the normal direction of the straight side of the voice coil, wherein the straight section is connected to the bracket to realize the positioning of the magnetic circuit unit on the bracket.

7. The loudspeaker assembly according to claim 3, It is characterized in that The magnetic circuit unit further comprises a top plate arranged on the top surface of the magnet, and a notch is provided in an edge area of ​​the top plate corresponding to the positioning mechanism in the axial direction.

8. The loudspeaker assembly according to claim 1, It is characterized in that The yoke side wall is a bent portion formed by bending, and the bottom of the bent portion has a rounded corner.

9. The loudspeaker assembly according to claim 1, It is characterized in that The diaphragm includes a diaphragm edge located radially outside the voice coil and a diaphragm center located radially inside the voice coil. The diaphragm edge has an upwardly protruding folding ring portion, and the folding ring portion has a radial inner edge extending in a circumferential manner in a square-like shape.

10. The loudspeaker assembly according to claim 9, It is characterized in that The center of the diaphragm has a sinking area, and the magnetic circuit unit further includes a top plate arranged on the top surface of the magnet, wherein the top plate has a central groove to match the sinking area.

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