CN219802577U - Loudspeaker - Google Patents

Abstract

Disclosed is a speaker including: a magnet assembly including a yoke and defining a magnetic gap; a bracket connected to the yoke; and the vibration assembly is connected with the bracket and comprises a vibrating diaphragm and a voice coil, the voice coil is connected with the vibrating diaphragm, a part of the voice coil is suspended in the magnetic gap, a first joint structure is formed on the side wall of the magnetic yoke, a second joint structure is arranged on the bracket, and the first joint structure on the side wall of the magnetic yoke is jointed with the second joint structure on the bracket to provide axial support of the magnetic yoke by the bracket.

Description

Loudspeaker

Technical Field

The present utility model relates to speakers, and more particularly, to a micro-speaker.

Background

Micro speakers have been widely used in various electronic products such as smart phones, tablet computers, notebook computers, etc. As the demand for light weight and small size of these devices has increased, the size of micro-speakers has also decreased. However, in micro-speaker designs, high performance, high structural strength, and long life are difficult to combine. Typically, to improve performance, it may be necessary to sacrifice structural strength; while increasing structural strength may result in performance loss.

Some existing micro-speaker designs can output better acoustic performance on the premise of light and thin structure, and meet the sound requirements of common scenes. However, these micro speakers have a disadvantage in terms of structural strength. For example, the mount of the micro-speaker cannot sufficiently effectively support the yoke, and thus functional failure is liable to occur in a severe use scenario. In addition, the micro-speaker gives limited space to the leads, which is disadvantageous for assembly. The lead position is susceptible to change during prolonged use, resulting in failure of the speaker function.

Therefore, there is a need for a micro-speaker that can compromise the performance, structural strength, and lifetime of the micro-speaker. For example, there is a need for a micro-speaker that can improve the support of the yoke by the speaker's support, increase the lead space of the speaker, and improve the structural strength and life of the speaker while maintaining the performance of the speaker.

Disclosure of Invention

The present utility model aims to overcome at least some of the above problems in the prior art.

According to an aspect of the utility model, there is provided a speaker comprising:

a magnet assembly including a yoke and defining a magnetic gap;

a bracket connected to the yoke; and

the vibration assembly is connected with the bracket and comprises a vibrating diaphragm and a voice coil, the voice coil is connected with the vibrating diaphragm, a part of the voice coil is suspended in the magnetic gap,

the side wall of the magnetic yoke is provided with a first joint structure, the support is provided with a second joint structure, and the first joint structure on the side wall of the magnetic yoke is jointed with the second joint structure on the support to provide axial support of the support to the magnetic yoke.

According to one or more embodiments of the present utility model, the magnet assembly further includes a magnet and a magnetic conductive plate, the yoke further includes a bottom portion, the sidewall extends from the bottom portion, the bottom portion and the sidewall define a space for accommodating the magnet and the magnetic conductive plate, and the magnetic gap is defined between the magnetic conductive plate and the yoke.

According to one or more embodiments of the present utility model, the first engagement structure is a shoulder formed by a thin wall portion on the side wall, and the second engagement structure is a projection formed on the bracket, the projection of the bracket being configured to bear on the shoulder.

According to one or more embodiments of the present utility model, the thin-walled portion is formed at an upper end of the side wall of the yoke and is retracted inward with respect to the rest of the side wall to form the shoulder.

According to one or more embodiments of the present utility model, the yoke further includes a bottom portion from which a sidewall of the yoke extends in a direction perpendicular to the bottom portion, and the bottom portion further includes a support portion configured to be engaged with a bottom surface of the bracket.

According to one or more embodiments of the utility model, the first engagement structure extends along the length of the side wall and the first engagement structure extends over more than half the length of the side wall.

According to one or more embodiments of the utility model, the first engagement structure extends along the entire length of the side wall.

According to one or more embodiments of the present utility model, the speaker is a rectangular speaker, the yoke includes a substantially rectangular bottom portion and four side walls extending from four edges of the bottom portion, respectively, in a direction perpendicular to the bottom portion, the four side walls being spaced apart at corners of the bottom portion,

the base further includes four support portions disposed at four corners of the base, respectively, the support portions being configured to engage a bottom surface of the bracket.

According to one or more embodiments of the present utility model, the four side walls include two first side walls extending from two short sides of the substantially rectangular bottom, respectively, and two second side walls extending from two long sides of the substantially rectangular bottom, respectively, the first engagement structure extends along an entire length of the two first side walls, and the first engagement structure extends along a length of the two second side walls that is greater than half a length of the second side walls.

According to one or more embodiments of the present utility model, the supporter includes an inner portion and an outer portion, the outer portion being higher than the inner portion, the vibration assembly further includes a folder, an outer end of the folder is connected to an upper surface of the outer portion of the supporter, an inner end of the folder is connected to the diaphragm, and the speaker further includes a lead wire of the voice coil, the lead wire of the voice coil being disposed on the upper surface of the inner portion.

According to one or more embodiments of the present utility model, the first engagement structure is a shoulder formed by the thin wall portion on the side wall, and the second engagement structure is a projection formed on the inner portion of the bracket, the projection of the bracket engaging the shoulder, the projection constituting a part of an upper surface of the inner portion.

According to one or more embodiments of the utility model, the first engagement structure and the second engagement structure have mutually engaging surfaces perpendicular to the axis of the loudspeaker or oblique to the axis of the loudspeaker.

According to one or more embodiments of the utility model, the speaker is a micro-speaker.

Drawings

Fig. 1 shows a cross-sectional view of a loudspeaker according to an example;

fig. 2 is a bottom view of the speaker of fig. 1;

fig. 3 is a top view of the speaker of fig. 1;

fig. 4A-4B illustrate a speaker according to one or more embodiments of the present utility model, wherein fig. 4A is a cross-sectional view of the speaker, and fig. 4B is an enlarged view of a dotted line portion of fig. 4A;

fig. 5 is an exploded view of the combination of the yoke and the bracket of the speaker shown in fig. 4A-4B;

fig. 6 is an exploded view of the speaker shown in fig. 4A-4B;

fig. 7 is a bottom view of the speaker shown in fig. 4A-4B;

fig. 8 is a top view of the speaker shown in fig. 4A-4B with the diaphragm and the bellows removed to show internal structures;

fig. 9 is a top view of the bracket of the speaker shown in fig. 4A-4B;

fig. 10 is a BL curve comparison diagram of a speaker of a comparison example and a speaker according to an embodiment of the present utility model;

fig. 11 is a graph comparing frequency response curves of a speaker of a comparative example and a speaker according to an embodiment of the present utility model;

fig. 12 shows a cross-sectional view of a loudspeaker according to another embodiment or embodiments of the utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "axis" herein refers to a central axis extending through the loudspeaker, the term "axial" refers to a direction along the axis of the loudspeaker, the term "radial" refers to a direction perpendicular to the axis, pointing toward or away from the axis, the term "upper", "lower" refers to relative upper and lower portions or positions along the axis, the term "top", "bottom" refers to relative top or bottom portions or positions along the axis, the term "outer", "radially outer" or "radially outer" refers to a portion or position away from the axis, the term "inner", "radially inner" or "radially inner" refers to a portion or position that is proximal to the axis, and the term "circumferential" refers to a direction about the axis.

The utility model provides a loudspeaker, in particular to a miniature loudspeaker. The loudspeaker comprises a magnetic yoke and a bracket connected with the magnetic yoke and used for supporting the magnetic yoke, wherein a first joint structure is formed on the side wall of the magnetic yoke, a second joint structure is arranged on the bracket, and the first joint structure is jointed with the second joint structure to provide or strengthen the axial support of the bracket to the magnetic yoke. In some embodiments, the first engagement structure and the second engagement structure have interengagement surfaces perpendicular to the axis of the speaker or oblique to the axis of the speaker.

In one or more embodiments according to the present utility model, the first engagement structure is a thin wall portion on a side wall of the yoke, the thin wall portion forming a shoulder, and the second engagement structure is a projection formed on the bracket, the projection being configured to be supported on the shoulder. In some embodiments, a thin wall portion is formed at an upper end of the side wall of the yoke and is retracted inwardly relative to the remainder of the side wall to form the shoulder.

According to the loudspeaker, the axial support of the loudspeaker to the magnet yoke can be enhanced under the condition that the size and/or the performance of the loudspeaker are kept unchanged, the structural strength of the loudspeaker is improved, and the service life of the loudspeaker is prolonged. In some embodiments, the lead space of the speaker can be increased while the connection strength between the yoke and the bracket is enhanced, which reduces the assembly difficulty and increases the service life of the speaker.

Fig. 1 shows a loudspeaker 10 according to an example. The loudspeaker 10 is a micro-speaker having an axis x and comprising a magnetic circuit assembly, a diaphragm assembly 70 and a support 80. The magnetic circuit assembly includes a magnet 20, a yoke 30, and a magnetically permeable plate 60. Yoke 30 includes a bottom 32 and a sidewall 40. The bottom 32 and the side walls 40 of the yoke 30 constitute a receiving space. The magnet 20 and the magnetic conductive plate 60 are disposed in the accommodating space. The magnetically permeable plate 60 and the bottom 32 of the yoke 30 sandwich the magnet therebetween and are configured to direct and concentrate the magnetic flux of the magnet 20 through the magnetic gap 56 between the magnetically permeable plate 60 and the side wall 40 of the yoke 30. The diaphragm assembly 70 includes a diaphragm 72, a gimbal 74 and a voice coil 76. The radially outer end of the bellows 74 is connected to a support 80, the radially inner end of which is connected to the diaphragm 72. The upper end of the voice coil 76 is connected to the diaphragm and/or the turn-down ring, and a coil portion 76a of the voice coil 76 is suspended in the magnetic gap 56. Leads 78 are electrically connected to coil portion 76a of voice coil 76 for transmitting an audio electrical signal to coil portion 76a of voice coil 76. When an audio electric signal flows through the coil portion 76a, the coil portion 76a in the magnetic gap 56 vibrates back and forth in the axial direction of the speaker 10 under the action of electromagnetic force, thereby driving the diaphragm 72 to vibrate to make a sound.

Fig. 2 is a bottom view of the speaker 10. The loudspeaker 10 has a generally rectangular shape. The four side walls 40 of the yoke 30 mate with corresponding recessed side wall portions of the bracket 80. The bottom portion 32 of the yoke 30 further includes a support portion 34 extending outwardly from a corner portion of the bottom portion 32 of the yoke 30. As shown in the drawing, the yoke 30 can be sufficiently supported from the bracket 80 by the interaction of the four side walls 40 of the yoke 30 with the corresponding side wall portions of the bracket 80 in the horizontal direction and the vertical direction (the length and width directions of the rectangle) of fig. 2. However, the yoke 30 is supported from the bracket 80 by the support portion 34 only in the region indicated by the broken line in fig. 2 in the axial direction of the speaker (i.e., in and out of the paper surface or in the direction perpendicular to the paper surface in fig. 2).

Fig. 3 is a top view of the loudspeaker 10 with the diaphragm 72 and the bellows 74 removed to show internal structures such as the voice coil 76 and leads 78 of the voice coil 76. As shown, the leads 78 of the voice coil 76 are accommodated in a narrow space of width D1.

The loudspeaker 10 shown in fig. 1-3 has the following technical problems: the strength of the connection between the yoke 30 and the bracket 80 is insufficient, and the bracket cannot sufficiently support the yoke in the axial direction, so that functional failure is likely to occur in a severe use scenario; the speaker 10 gives limited space to the leads, is not easy to assemble, and is prone to variations in lead position during prolonged use, resulting in speaker failure. However, in the conventional speaker structural design, the measures to enhance the connection strength between the yoke 30 and the bracket 80 and/or to increase the lead space of the speaker may increase the size of the speaker at the same time, which is undesirable for the micro-speaker.

Fig. 4A-4B and 5-9 illustrate a speaker 100 according to one or more embodiments of the present utility model, wherein fig. 4A is a cross-sectional view of the speaker 100, fig. 4B is an enlarged view of a broken line portion of fig. 4A, fig. 5 is an exploded view of an assembly including a yoke 130 and a bracket 180, fig. 6 is an exploded view of the speaker assembly 100, fig. 7 is a bottom view of the speaker 100, fig. 8 is a top view of the speaker 100, wherein a diaphragm 172 and a collar 174 are removed to illustrate internal structures such as a voice coil 176 and leads 178 of the voice coil 176, and fig. 9 is a top view of the bracket 180.

Speaker 100 is a miniature speaker having an axis x and comprising a magnetic circuit assembly, a diaphragm assembly 170, and a carrier 180. The magnetic circuit assembly includes a magnet 120, a yoke 130, and a magnetically conductive plate 160. The yoke 130 includes a bottom 132 and a sidewall 140. The bottom 132 and the side walls 140 of the yoke 130 form a receiving space. The magnet 120 and the magnetic conductive plate 160 are disposed in the accommodating space. The magnetically permeable plate 160 and the bottom 132 of the yoke 130 sandwich the magnet therebetween and are configured to direct and concentrate the magnetic flux of the magnet 120 through the magnetic gap 156 between the magnetically permeable plate 160 and the sidewall 140 of the yoke 130. The diaphragm assembly 170 includes a diaphragm 172, a gimbal 174, and a voice coil 176. The radially outer end of the bellows 174 is connected to a support 180, and the radially inner end thereof is connected to the diaphragm 172 for supporting the diaphragm 172 to the support 180. The upper end of the voice coil 176 is connected to the diaphragm 172 and/or the turn-down ring 174, and a coil portion 176a of the voice coil 176 is suspended in the magnetic gap 156. Leads 178 of voice coil 176 are electrically connected to coil portion 176a of voice coil 176 for transmitting an audio electrical signal to coil portion 176a of voice coil 176. When an audio electric signal flows through the coil portion 176a, the coil portion 176a in the magnetic gap 156 vibrates back and forth in the axial direction of the speaker 100 under the action of electromagnetic force, thereby driving the diaphragm 172 to vibrate to make a sound.

In the embodiment shown, speaker 100 is generally rectangular, and yoke 130 includes a generally rectangular base 132 and four sidewalls 140 extending from base 132 in a direction substantially perpendicular to base 132. The bottom 132 of the yoke 130 further includes four support portions 134 extending outwardly from four corners of the bottom 132 of the yoke 130, respectively. In the dotted line area of fig. 7, the support portion 134 of the yoke 130 is engaged with the bottom of the bracket 180, so that the bracket 180 can support the yoke 30 in the axial direction of the speaker (i.e., in and out of the paper or in a direction perpendicular to the paper of fig. 7).

The four sidewalls 140 of the yoke 130 are each located on one side of the generally rectangular bottom 132 and are spaced apart from one another at the corners of the rectangle. The bracket 180 is formed with four corresponding recesses 198. The four recesses 198 of the bracket 180 receive and cooperate with the four side walls 140 of the yoke 130, respectively, for fixedly positioning the yoke 130 relative to the bracket 180 in the horizontal and vertical directions (i.e., directions of the long and short sides of the rectangle) of fig. 9. The upper end of the side wall 140 of the yoke 130 includes a thin-walled portion 142, the thin-walled portion 142 of the side wall 140 being recessed inwardly relative to the remainder of the side wall 140 to form a shoulder or step 144 on the outer wall of the side wall 140.

Bracket 180 includes an outer portion 182 and an inner portion 190. As shown, the height of the outer portion 182 is higher than the inner portion 190, i.e., the upper surface 184 of the outer portion 182 is higher than the upper surface 196 of the inner portion 190. The upper surface 184 of the outer portion 182 is configured to be coupled to the outer end of the collar 174, while the upper surface 196 of the inner portion 190 of the bracket 180 is configured to support the leads 178 of the voice coil 176. Leads 178 of voice coil 176 are thus disposed in the space defined by upper surface 196 of inner portion 190, outer portion 182 and collar 174 of carrier 180. The inner portion 190 of the bracket 180 is formed with inwardly projecting lugs 192 to form shoulders 194 on the inner wall of the bracket 180. Shoulder 144 of sidewall 140 of yoke 130 mates with projection 192 or shoulder 194 of bracket 180 such that bracket 180 provides further axial support for yoke 130. In addition, since the bracket 180 is provided with the projection 192, the width of the upper surface 196 of the inner portion 190 of the bracket 180 is significantly increased.

By providing the thin wall portion 142 on the side wall 140 of the yoke 130 and the projection 192 on the bracket 180, the bracket 180 provides further axial support for the yoke 130. That is, in addition to the engagement or engagement between the bottom surface of the bracket 180 and the support portion 134 of the yoke 130 (four dashed areas shown in fig. 7), the speaker 100 provides further axial support for the yoke by the engagement or engagement between the shoulder 144 on the sidewall 140 of the yoke 130 and the projection 192 on the bracket 180, thereby improving the structural strength of the speaker.

In one or more embodiments according to the present utility model, the overall dimensions of the loudspeaker 10 shown in fig. 1-3 and the loudspeaker 100 shown in fig. 4A-4B and fig. 5-9 are 25mm by 9mm by 3mm. In this embodiment, the axial support area (4 dotted areas shown in fig. 2) between the yoke 30 and the bracket 80 of the speaker 10 is 2.9mm ² While the axial support area between the yoke 130 and the bracket 180 of the speaker 100 (4 dotted areas shown in fig. 7 + the engagement area between the shoulder 144 of the yoke 130 and the projection 192 of the bracket 180) is 7.8mm ² . The axial support area between the yoke 130 and the bracket 180 of the speaker 100 shown in fig. 4A-4B and fig. 5-9 is increased by 169% compared to the speaker 10 shown in fig. 1-3, and the structural strength of the speaker 100 is significantly improved.

The width of the upper surface 196 of the inner portion 190 of the bracket 180 is substantially increased due to the presence of the projections 192. In a speaker arrangement, the upper surface 196 of the inner portion 190 of the spider 180 is generally used to locate the leads 178 of the voice coil 176. That is, the space of the speaker 100 for disposing the leads 178 of the voice coil 176 is significantly enlarged as compared to the speaker 10 shown in fig. 1 to 3, as shown by the space width D2 of fig. 8. In one or more embodiments according to the present utility model, the overall dimensions of the loudspeaker 10 shown in fig. 1-3 and the loudspeaker 100 shown in fig. 4A-4B and fig. 5-9 are 25mm by 9mm by 3mm. In this embodiment, the width D1 of the upper surface of the inner portion of the stand of the speaker 10 shown in FIGS. 1-3 is 0.46mm, while the width D2 of the upper surface of the inner portion of the stand of the speaker 100 shown in FIGS. 4A-4B and 5-9 is 0.61mm. That is, the lead space width of the speaker 100 is increased from 0.46mm to 0.61mm, and the lead space is increased by 32% as compared to the speaker 10 shown in fig. 1-3.

In the loudspeaker 100, the leads 178 of the voice coil 176 are held in place by adhesive bonding to the upper surface 196 of the inner portion 190 of the bracket 180, and the leads 178 need to be sufficiently spaced from the outer portion 182 of the bracket 180 or the yoke 130. During use of the speaker 100, the leads 178 may vibrate or move with the vibration of the voice coil 176. If the leads 178 are too close to or even in contact with the outer portion 182 of the bracket 180 or the yoke 130, the leads 178 are susceptible to wear and even damage during use of the speaker as the voice coil 176 vibrates and rubs against the outer portion 182 or the yoke 130, which can lead to premature failure of the speaker. The speaker 100 according to the present utility model has a reduced difficulty in assembly and a prolonged service life due to an increased width of the upper surface of the inner portion of the holder, i.e., the width of the lead space.

In conventional speaker designs, it is generally believed that the shape change of the side walls of the yoke, particularly the localized thinning of the side walls of the yoke, can result in a magnetic field distribution of the magnetic circuit assembly of the speaker, thereby adversely affecting the performance of the speaker. In conventional speaker designs, certain components of the speaker are often oversized in one or more directions in order to increase the support of the yoke by the bracket, or to increase lead space. This results in an increase in the volume of the speaker, which is particularly disadvantageous in micro-speaker designs. The inventors of the present utility model have found, through many numerical simulations and experimental studies, that forming an inwardly-retracted thin wall portion at the upper end of the side wall of the yoke (as shown in fig. 4A-4B, for example) does not affect the magnetic circuit assembly of the speakerAnd thus does not affect the performance of the loudspeaker. The inventors performed numerical simulations and experimental tests on the speaker 10 shown in fig. 1-3 and the speaker 100 shown in fig. 4A-4B and fig. 5-9. Numerical simulation was performed using COMSOL MultiphysicsPerformed by a method of manufacturing the same. Numerical simulation results show that the magnetic circuit assembly of loudspeaker 10 and the magnetic circuit assembly of loudspeaker 100 have substantially the same magnetic field distribution, and in particular the magnetic field distribution at the magnetic gap is substantially the same.

Fig. 10 is a BL curve comparison diagram of a speaker of a comparison example and a speaker according to an embodiment of the present utility model, in which a solid line curve is a BL curve of the speaker of the comparison example and a broken line curve is a BL curve of the speaker according to an embodiment of the present utility model. Fig. 11 is a graph of frequency response curves of a speaker of a comparative example and a speaker according to an embodiment of the present utility model, in which a solid line curve is a frequency response curve of the speaker of the comparative example and a broken line curve is a frequency response curve of the speaker according to an embodiment of the present utility model. The comparative example in fig. 10 and 11 is to use the speaker 10 shown in fig. 1-3, while the embodiment is to use the speaker 100 shown in fig. 4A-4B and 5-9. The speakers used in fig. 10 and 11 are micro-speakers, and the external dimensions are 25mm by 9mm by 3mm.

The graph of FIG. 10 shows the use of COMSOL MultiphysicsObtained by performing numerical simulation in which the abscissa is the displacement of the voice coil (coil portion) in the magnetic field and the ordinate is the force conversion factor BL. As shown, the BL curves of the speaker 10 shown in fig. 1-3 substantially match the BL curves of the speaker 100 shown in fig. 4A-4B and fig. 5-9. Fig. 11 is a graph comparing frequency response curves of speakers measured through experiments. As shown, the frequency response curves of the loudspeaker 10 shown in fig. 1-3 substantially match the frequency response curves of the loudspeaker 100 shown in fig. 4A-4B and fig. 5-9. As can be seen from fig. 10 and 11, the performance of the loudspeaker 10 shown in fig. 1-3 and the loudspeaker 100 shown in fig. 4A-4B and fig. 5-9 is substantially the sameThere is no change.

Therefore, according to the speaker 100 of one or more embodiments of the present utility model, by providing the thin-walled portion 142 on the sidewall 140 of the yoke 130 and providing the protrusion portion on the bracket to be matched with the shoulder of the thin-walled portion, the axial support of the bracket of the speaker to the yoke can be enhanced, the structural strength of the speaker can be enhanced, the lead space of the voice coil can be increased, and the service life of the speaker can be prolonged, without changing the performance and size of the speaker.

Fig. 12 illustrates a cross-sectional view of a speaker 200 in accordance with another embodiment or embodiments of the present utility model. Speaker 200 is a miniature speaker comprising a magnetic circuit assembly, a diaphragm assembly 270, and a support 280. The magnetic circuit assembly includes a magnet 220, a yoke 230, and a magnetically permeable plate 260. The yoke 230 includes a bottom 232 and a sidewall 240. The bottom 232 and the side wall 240 of the yoke 230 form a receiving space. The magnet 220 and the magnetic conductive plate 260 are disposed in the receiving space. The magnetically permeable plate 260 and the bottom 232 of the yoke 230 sandwich the magnet therebetween and are configured to direct and concentrate the magnetic flux of the magnet 220 through the magnetic gap 256 between the magnetically permeable plate 260 and the side wall 240 of the yoke 230. The diaphragm assembly 270 includes a diaphragm 272, a bellows 274, and a voice coil 276. The radially outer end of the bellows 274 is connected to a bracket 280, and the radially inner end thereof is connected to the diaphragm 272 for supporting the diaphragm 272 to the bracket 280. The upper end of the voice coil 276 is connected to the diaphragm 272 and/or the bellows 274, and a coil portion 276a of the voice coil 276 is suspended in the magnetic gap 256. The main difference between the speaker 200 shown in fig. 12 and the speaker 100 shown in fig. 4A is that the curved portion of the fold 274 of the speaker 200 is concave instead of convex as in the speaker 100. The stand arrangement of the loudspeaker 200 is also different in order to accommodate the fold-over 274. Further, unlike the speaker 100 that transmits an audio electric signal to a coil portion of a voice coil through a lead wire of the voice coil, the speaker 200 does not include a lead wire, but transmits an audio electric signal to a coil portion of a voice coil through a flexible circuit board (FPC) 278. Other structures and operations of the speaker 200 are similar to those of the speaker 100, and will not be described again. In other embodiments according to the utility model, the speaker is not limited to the wire connection shown in fig. 1-11 and the flexible circuit board connection shown in fig. 12, but may be connected by other suitable means, such as a nylon wire connection.

In the embodiment shown in fig. 4A-4B and 5-12, thin wall portions are provided at the upper ends of the side walls 140, 240 of the yokes 130, 230 and shoulder portions are formed to cooperate with the protruding portions of the brackets 180, 280 to strengthen the axial support of the yokes by the brackets. In the embodiment shown, the thin wall portion 142 is provided at the upper ends of the side walls 140 on four sides of the generally rectangular shape of the speaker 100 along the entire length of the side walls. In other embodiments according to the utility model, the thin wall portion may be provided along a part of the length of the side wall of the speaker, i.e. only locally at the upper end of the side wall. For example, in some embodiments, the thin wall portion is disposed along the entire length of the short side of the generally rectangular shape of the speaker and along a portion of the length of the long side of the generally rectangular shape of the speaker (e.g., more than half the length of the long side). In other embodiments, the thin wall portion is disposed along only a portion of the length (e.g., more than half the length) on both the long and short sides of the generally rectangular shape of the speaker. In other embodiments, the thin wall portion may be provided on only a portion of the side wall of the speaker, for example, the thin wall portion may be provided on only two or three side walls of the speaker. Likewise or correspondingly, the projections on the support of the loudspeaker may also be provided along the entire length or part of the length of the portion corresponding to the side wall of the yoke.

Fig. 4A-4B and 5-12 illustrate speakers according to some embodiments of the utility model, however the utility model is not limited thereto. In one or more embodiments according to the present utility model, the speaker is not limited to a square structure, but may be a racetrack shape, a round shape, or any other suitable shape, and the magnetic circuit assembly, the diaphragm assembly, the bracket, etc. of the speaker may take any suitable structure and form. Similar to the speaker 100 or 200, the side wall of the yoke of the racetrack-shaped, circular or other shaped or structured speaker is also provided with a thin wall portion, and the corresponding position of the bracket is provided with a protruding portion. The shoulder formed by the thin wall portion of the side wall of the yoke is matched or jointed with the protruding portion of the bracket, so that the axial support of the bracket to the yoke is enhanced. Similarly, in these racetrack, round, or any other suitable shape or configuration of speakers, the thin wall portion may be provided along all or part of the length of the side wall, and the projection on the bracket may be provided along all or part of the length of the corresponding portion on the bracket. The remaining structure and operation of these speakers may be similar to speaker 100 or speaker 200 and will not be described in detail herein.

In one or more embodiments according to the present utility model, the thin wall portion on the yoke and the protruding portion on the bracket may be formed by a process such as extrusion or stamping. In other embodiments, the thin wall portion on the yoke and the protruding portion on the bracket may be formed by a process such as stretching or machining.

In the embodiment shown in fig. 4A-4B and 5-12, thin wall portions are provided at the upper ends of the side walls 140, 240 of the yokes 130, 230 and shoulder portions are formed to cooperate with the protruding portions of the brackets 180, 280 to strengthen the axial support of the yokes by the brackets. The utility model is not limited thereto and a loudspeaker according to the utility model may comprise other forms of engagement structures provided on the yoke and the bracket, provided that the engagement structures on the yoke and the engagement structures on the bracket are able to cooperate or engage with each other to enhance the axial support of the bracket to the yoke, e.g. the engagement structures on the yoke and the engagement structures on the bracket have mutually engaging surfaces perpendicular to the axis of the loudspeaker or oblique to the axis of the loudspeaker. In one or more embodiments according to the present utility model, an outward protrusion may be formed on the yoke and a recess that mates or engages with the protrusion of the yoke may be formed on the bracket, thereby enhancing the axial supporting effect of the bracket on the yoke.

In one or more embodiments according to the utility model, the speakers are micro-speakers 25mm x 9mm x 3mm. In another or more embodiments according to the utility model, the speaker may be any suitably sized micro-speaker, for example, a micro-speaker having a length-width or diameter dimension of 40mm or less and a thickness of 10mm or less. In other embodiments according to the utility model, the speaker may also be a small speaker with a diameter dimension of more than 40mm and a thickness of more than 10 mm.

The utility model can be realized in the following ways:

item 1: a speaker, comprising:

a magnet assembly including a yoke and defining a magnetic gap;

a bracket connected to the yoke; and

the vibration assembly is connected with the bracket and comprises a vibrating diaphragm and a voice coil, the voice coil is connected with the vibrating diaphragm, a part of the voice coil is suspended in the magnetic gap,

the side wall of the magnetic yoke is provided with a first joint structure, the support is provided with a second joint structure, and the first joint structure on the side wall of the magnetic yoke is jointed with the second joint structure on the support to provide axial support of the support to the magnetic yoke.

Item 2: the loudspeaker of item 1 wherein the magnet assembly further comprises a magnet and a magnetically permeable plate, the yoke further comprising a bottom portion, the sidewall extending from the bottom portion, the bottom portion and the sidewall defining a space for receiving the magnet and the magnetically permeable plate, the magnetic gap being defined between the magnetically permeable plate and the yoke.

Item 3: a loudspeaker according to any one of the preceding claims, wherein the first engagement formation is a shoulder formed by a thin wall portion on the side wall and the second engagement formation is a projection formed on the bracket, the projection of the bracket being configured to bear on the shoulder.

Item 4: a loudspeaker according to any one of the preceding claims, wherein the thin wall portion is formed at an upper end of the side wall of the yoke and is recessed inwardly relative to the remainder of the side wall to form the shoulder.

Item 5: a loudspeaker according to any one of the preceding claims, wherein the yoke further comprises a base from which the side walls of the yoke extend in a direction perpendicular to the base, the base further comprising a support portion configured to engage with a bottom surface of the support.

Item 6: a loudspeaker according to any one of the preceding claims, wherein the first engagement formation extends along the length of the side wall and the first engagement formation extends over more than half the length of the side wall.

Item 7: a loudspeaker according to any one of the preceding claims, wherein the first engagement formation extends along the entire length of the side wall.

Item 8: the loudspeaker according to any one of the preceding items, wherein the loudspeaker is a rectangular loudspeaker, the yoke comprises a generally rectangular base and four side walls extending from four edges of the base, respectively, perpendicular to the base, the four side walls being spaced apart at corners of the base,

the base further includes four support portions disposed at four corners of the base, respectively, the support portions being configured to engage a bottom surface of the bracket.

Item 9: a loudspeaker according to any one of the preceding items, wherein the four side walls comprise two first side walls extending from two short sides of the generally rectangular base, respectively, and two second side walls extending from two long sides of the generally rectangular base, respectively, the first engagement structure extending along the entire length of the two first side walls, and the first engagement structure extending along the two second side walls for a length greater than half the length of the second side walls.

Item 10: the loudspeaker of any of the preceding items, wherein the support comprises an inner portion and an outer portion, the outer portion being higher in height than the inner portion, the vibration assembly further comprising a collar, an outer end of the collar being connected to an upper surface of the outer portion of the support, an inner end of the collar being connected to the diaphragm, the loudspeaker further comprising leads of the voice coil, the leads of the voice coil being arranged on the upper surface of the inner portion.

Item 11: a loudspeaker according to any one of the preceding items, wherein the first engagement formation is a shoulder formed by the thin wall portion on the side wall, and the second engagement formation is a projection formed on the inner portion of the bracket, the projection of the bracket engaging the shoulder, the projection forming part of the upper surface of the inner portion.

Item 12: a loudspeaker according to any one of the preceding claims, wherein the first engagement structure and the second engagement structure have interengagement surfaces perpendicular to the axis of the loudspeaker or oblique to the axis of the loudspeaker.

Item 13: a loudspeaker according to any one of the preceding claims, wherein the loudspeaker is a micro-speaker.

The foregoing description of the exemplary embodiments has been presented only for the purpose of illustrating the principles of the utility model and is not intended to limit the scope of the utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and the spirit of the utility model, and these modifications and improvements are also within the scope of the utility model.

Claims (13)

1. A loudspeaker, comprising:

a magnet assembly including a yoke and defining a magnetic gap;

a bracket connected to the yoke; and

the vibration assembly is connected with the bracket and comprises a vibrating diaphragm and a voice coil, the voice coil is connected with the vibrating diaphragm, a part of the voice coil is suspended in the magnetic gap,

the side wall of the magnetic yoke is provided with a first joint structure, the support is provided with a second joint structure, and the first joint structure on the side wall of the magnetic yoke is jointed with the second joint structure on the support to provide axial support of the support to the magnetic yoke.

2. The loudspeaker of claim 1, wherein the magnet assembly further comprises a magnet and a magnetically permeable plate, the yoke further comprising a bottom portion, the sidewall extending from the bottom portion, the bottom portion and the sidewall defining a space for receiving the magnet and the magnetically permeable plate, the magnetic gap being defined between the magnetically permeable plate and the yoke.

3. The loudspeaker of claim 1 wherein the first engagement structure is a shoulder formed by a thin wall portion on the side wall and the second engagement structure is a projection formed on the bracket, the projection of the bracket being configured to bear on the shoulder.

4. A loudspeaker according to claim 3, wherein the thin-walled portion is formed at an upper end of the side wall of the yoke and is recessed inwardly relative to the remainder of the side wall to form the shoulder.

5. The loudspeaker of claim 1, wherein the yoke further comprises a bottom portion from which a sidewall of the yoke extends in a direction perpendicular to the bottom portion, the bottom portion further comprising a support portion configured to engage a bottom surface of the bracket.

6. A loudspeaker according to any one of claims 1 to 5, wherein the first engagement formation extends along the length of the side wall and the first engagement formation extends over more than half the length of the side wall.

7. A loudspeaker according to any one of claims 1 to 5, wherein the first engagement formation extends along the entire length of the side wall.

8. The loudspeaker of any one of claims 1-5 wherein the loudspeaker is a rectangular loudspeaker, the yoke comprises a generally rectangular base and four side walls extending from four edges of the base, respectively, perpendicular to the base, the four side walls being spaced apart at corners of the base,

the base further includes four support portions disposed at four corners of the base, respectively, the support portions being configured to engage a bottom surface of the bracket.

9. The loudspeaker of claim 8, wherein the four side walls include two first side walls extending from two short sides of the generally rectangular bottom, respectively, and two second side walls extending from two long sides of the generally rectangular bottom, respectively, the first engagement structure extending along an entire length of the two first side walls, and the first engagement structure extending along more than half a length of the two second side walls.

10. The loudspeaker of any of claims 1-5, wherein the support comprises an inner portion and an outer portion, the outer portion being taller than the inner portion, the vibration assembly further comprising a gimbal, an outer end of the gimbal being connected to an upper surface of the outer portion of the support, an inner end of the gimbal being connected to the diaphragm, the loudspeaker further comprising leads of the voice coil, the leads of the voice coil being disposed on the upper surface of the inner portion.

11. The speaker of claim 10 wherein said first engagement structure is a thin wall portion of said side wall forming a shoulder and said second engagement structure is a projection formed on said inner portion of said bracket, said projection of said bracket engaging said shoulder, said projection forming a portion of an upper surface of said inner portion.

12. A loudspeaker according to any one of claims 1 to 5, wherein the first engagement formation and the second engagement formation have interengagement surfaces perpendicular to the axis of the loudspeaker or oblique to the axis of the loudspeaker.

13. A loudspeaker according to any one of claims 1-5, characterized in that the loudspeaker is a micro-speaker.