CN218103495U - Loudspeaker and earphone - Google Patents

Abstract

The utility model discloses a loudspeaker and an earphone, which comprises a supporting component, a magnetic circuit component and a vibration component; the support assembly comprises a basin frame, the magnetic circuit assembly is arranged on the basin frame and forms a magnetic gap with a magnetic field, the vibration assembly is arranged on the basin frame, the vibration plate comprises a central part, an outer peripheral part and a concave part, the concave part is formed between the central part and the outer peripheral part and is sunken towards the basin cavity, and the concave part is inserted into the magnetic gap; the loudspeaker also comprises magnetic fluid, the magnetic fluid is arranged in the magnetic gap around the peripheral wall of the concave part, the voice coil is accommodated in the concave part at the outer side of the vibrating plate, and the voice coil can drive the vibrating plate to reciprocate together along the depth direction of the magnetic gap under the action of a magnetic field in the magnetic gap, so that the loudspeaker can be miniaturized, and meanwhile, the lowest resonance frequency can be kept low.

Description

Loudspeaker and earphone

Technical Field

The utility model relates to a speaker technical field especially relates to a speaker and earphone.

Background

In recent years, with the development of electronic science and technology, people have higher and higher requirements for using electronic products, the electronic products tend to be miniaturized, and speakers applied to some devices capable of playing audio tend to be miniaturized.

While the miniaturization of the speaker is pursued, the original technical function of the speaker needs to be ensured to be good, however, when some audio transmission devices such as the existing speaker are designed in a miniaturized manner, the whole size of the speaker itself becomes small, so that the natural frequency of the speaker becomes high, and the lowest resonance frequency of the speaker becomes high, and the low-frequency sound pressure is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at, solve the higher technical problem of the minimum resonant frequency of current speaker when whole size diminishes.

In order to solve the above technical problem, an embodiment of the present invention provides a speaker, which adopts the following technical solution:

the speaker includes:

the support assembly comprises a basin frame, a basin cavity is formed on the basin frame, and a mounting hole communicated with the basin cavity is formed in the basin frame;

the magnetic circuit assembly is arranged on the basin frame at a position corresponding to the mounting hole and forms a magnetic gap with a magnetic field, and the magnetic gap is communicated with the basin cavity;

the vibration assembly is arranged on the basin frame and comprises a vibration plate, a suspension edge and a voice coil, the vibration plate comprises a central part, an outer peripheral part and a concave part, one end of the suspension edge is arranged on the basin frame, and the vibration plate is connected with the other end of the suspension edge through the outer peripheral part so as to be arranged on the basin frame; the recess is formed between the central portion and the outer peripheral portion, is recessed toward the basin cavity, and is inserted into the magnetic gap;

wherein the speaker further comprises a magnetic fluid disposed within the magnetic gap around a peripheral wall of the recess; the voice coil is accommodated in the concave part at the outer side of the vibration plate, and under the action of a magnetic field in the magnetic gap, the voice coil can drive the vibration plate to reciprocate along the depth direction of the magnetic gap.

Further, in a preferred embodiment, a lead connected to an external circuit is led out from the voice coil, and the lead runs along the outer wall surface of the vibration plate.

Further, in a preferred aspect of some embodiments, the magnetic circuit assembly includes a permanent magnet, a first magnetizer and a second magnetizer, the first magnetizer is provided with a groove along a thickness direction thereof, the permanent magnet is installed in the groove, the second magnetizer is placed on a top of the permanent magnet, and the outer peripheral wall of the second magnetizer, the inner peripheral wall of the groove, and the outer peripheral wall of the permanent magnet form the magnetic gap together.

Further, in a preferred version of some embodiments, the magnetic fluid comprises an inner fluid and an outer fluid, the inner fluid being within the magnetic gap between the recess and the corresponding outer peripheral wall of the second magnetizer; the external fluid is located between the concave portion and the inner peripheral wall of the corresponding first magnetizer in the magnetic gap.

Further, in some embodiments, the internal fluid has a thickness in the range of 0.1mm to 0.25mm; the thickness range of the external fluid is 0.1 mm-0.25 mm.

Further, in some embodiments, the voice coil has a thickness ranging from 0.45mm to 0.55mm; the transverse distance between the inner peripheral wall of the first magnetizer and the outer peripheral wall of the second magnetizer ranges from 0.7mm to 1.0mm.

Further, in a preferred aspect of some embodiments, the recess of the vibration plate is in an annular structure and is sleeved on the periphery of the second magnetizer; the central portion of the vibrating plate is located on the top of the second magnetizer, and the center line of the central portion and the center line of the second magnetizer are located on the same straight line.

Further, in a preferable aspect of some embodiments, an outer peripheral wall of the second magnetic conductor is flush with an outer peripheral wall of the permanent magnet.

Further, in a preferable aspect of some embodiments, the vibration plate is made of a material having a property of blocking permeability of the magnetic fluid.

In order to solve the above technical problem, an embodiment of the present invention further provides an earphone, which adopts the following technical solution: the earphone comprises the loudspeaker.

Compared with the prior art, the embodiment of the utility model provides a speaker and earphone mainly have following beneficial effect:

when the loudspeaker is designed in a miniaturized way, the concave part is formed between the central part and the peripheral part of the vibration plate, the concave part is inserted in the magnetic gap which is formed by the magnetic circuit component and communicated with the cavity, the voice coil is accommodated in the concave part from the outer side of the vibration plate, and meanwhile, the magnetic fluid surrounds the peripheral wall of the concave part and is arranged in the magnetic gap, so that when the voice coil drives the vibration plate to reciprocate along the depth direction of the magnetic gap under the action of a magnetic field in the magnetic gap, on one hand, the stability of the magnetic flux of the voice coil can be ensured by the arrangement that the magnetic coil is inserted in the concave part of the magnetic gap, and the magnetic fluid surrounds the peripheral wall of the concave part and is arranged in the magnetic gap, and further, the realization of enough low-frequency sound pressure is facilitated; on the other hand, the vibration plate can be connected to the frame by connecting the suspension edge to the outer peripheral portion, thereby being advantageous to ensure a low minimum resonance frequency when the speaker is designed in a compact manner.

Drawings

In order to illustrate the solution of the present invention more clearly, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts. Wherein:

fig. 1 is a plan cut-away view of a speaker in an embodiment of the invention;

FIG. 2 is an enlarged view of a portion of the loudspeaker of FIG. 1 at A;

FIG. 3 is an exploded schematic view of the loudspeaker of FIG. 1;

fig. 4 is a plan sectional view of a speaker according to another embodiment of the present invention.

The reference numbers in the drawings are as follows:

100. a speaker;

1. a support assembly; 11. a basin stand; 111. mounting holes; 12. a pelvic cavity;

2. a magnetic circuit assembly; 21. a permanent magnet; 22. a first magnetizer; 221. a groove; 23. a second magnetizer; 24. a magnetic gap;

3. a vibrating assembly; 31. a vibrating plate; 311. a central portion; 312. a peripheral portion; 313. a recess; 32. hanging edges; 33. a voice coil;

4. a magnetic fluid; 41. an inner fluid; 42. an external fluid;

5. a wire;

6. and (4) ring sheets.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, for example, the terms "length," "width," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or position illustrated in the drawings, which are for convenience of description only and are not to be construed as limiting of the present disclosure.

The terms "including" and "having," and any variations thereof in the description and claims of the invention and the description of the foregoing figures, are intended to cover non-exclusive inclusions; the terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. The meaning of "plurality" is two or more unless specifically limited otherwise.

In the description and claims of the present invention and in the description of the above figures, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it can be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

An embodiment of the present invention provides a speaker 100, and the speaker 100 is mainly used in various wearable devices, wherein the wearable devices include but are not limited to in-ear earphones, headphones, and hanging earphones. In addition, the speaker 100 is mainly improved for the miniaturized design of the speaker 100.

As shown in fig. 1, the speaker 100 includes a support member 1, a magnetic circuit member 2, and a vibration member 3. Wherein, the supporting component 1 includes a basin frame 11, in order to facilitate the installation of the magnetic circuit component 2 and the vibration component 3, a basin cavity 12 is opened on the basin frame 11 and an installation hole 111 communicated with the basin cavity 12 is opened, the magnetic circuit component 2 is arranged on the basin frame 11 at a position corresponding to the installation hole 111 and is formed with a magnetic gap 24 with a stable magnetic field, and the magnetic gap 24 is communicated with the basin cavity 12.

In the present embodiment, as shown in fig. 1, the vibration assembly 3 is provided on the tub stand 11. The vibration unit 3 includes a vibration plate 31, a suspension edge 32, and a voice coil 33, and the vibration plate 31 includes a central portion 311, an outer peripheral portion 312, and a recess 313. Wherein, one end of the hanging edge 32 is arranged on the frame 11, the vibrating plate 31 is connected with the other end of the hanging edge 32 through the peripheral part 312 to be arranged on the frame 11; as shown in fig. 1, the recess 313 is formed between the central portion 311 and the outer peripheral portion 312 so as to be recessed toward the basin 12, and is inserted into the magnetic gap 24. The voice coil 33 is accommodated in the recess 313 outside the diaphragm 31, and the voice coil 33 is capable of reciprocating the diaphragm 31 in the depth direction of the magnetic gap 24 by the magnetic field in the magnetic gap 24.

In the present embodiment, in order to further maintain the stability of the magnetic flux of the magnetic circuit in the magnetic gap 24 and prevent the voice coil 33 from contacting the magnetic circuit assembly 2, as shown in fig. 1 and 2, the speaker 100 further includes the magnetic fluid 4, and the magnetic fluid 4 is disposed in the magnetic gap 24 around the outer peripheral wall of the recess 313.

Specifically, the voice coil 33 may be disposed in the recess 313 of the vibration plate 31 by an adhesive such as glue, so that the voice coil 33 may bring the vibration plate 31 to vibrate together when vibrating. The entire structure of the vibration plate 31 is integrally formed from the same material of the vibration plate 31, simplifying the processing steps of the vibration plate 31 and saving the material for manufacturing the vibration plate 31. When an electrical signal is connected to the voice coil 33, the energized voice coil 33 located in the magnetic gap 24 is subjected to an alternating driving force to generate an alternating motion, and drives the vibrating plate 31 to reciprocate along the depth direction of the magnetic gap 24, and repeatedly push the surrounding air to make a sound.

In summary, compared with the prior art, the speaker 100 has at least the following beneficial effects: this speaker 100 is made compact and at the same time can contribute to achieving sufficient low-frequency sound pressure by inserting the recess 313 formed between the central portion 311 and the outer peripheral portion 312 of the diaphragm 31 into the magnetic gap 24 formed by the magnetic circuit assembly 2, and accommodating the voice coil 33 in the recess 313 from the outside of the diaphragm 31, and placing the magnetic fluid 4 in the magnetic gap 24 around the outer peripheral wall of the recess 313; on the other hand, the diaphragm 31 is provided on the frame 11 by the connection of the suspension edge 32 and the outer peripheral portion 312, thereby being advantageous in ensuring that the speaker 100 has a low lowest resonance frequency when the speaker 100 is downsized.

In order to make the technical solution of the present invention better understood, the technical solution of the embodiment of the present invention will be clearly and completely described below with reference to fig. 1 to 3.

Embodiment one of the loudspeaker 100

Further, as a specific implementation manner in some embodiments of the present invention, as shown in fig. 1, in order to facilitate the electrical signal to access the voice coil 33, a wire 5 connected to an external circuit is led out from the voice coil 33, and the wire 5 runs along the outer wall surface of the vibrating plate 31. An energized voice coil 33, located in the magnetic gap 24 with a magnetic field, vibrates under the influence of the magnetic field and current. In addition, since the recess 313 of the diaphragm 31 isolates the magnetic fluid 4 from the voice coil 33, the lead 5 is routed along the outer wall surface of the diaphragm 31, so that the magnetic fluid 4 can be effectively prevented from seeping through the lead 5 and/or the connection between the lead 5 and the diaphragm 31, which is beneficial to maintaining the stability of the magnetic flux of the magnetic circuit in the magnetic gap 24, and ensuring that the voice coil 33 can keep the central vibration.

Further, as a specific implementation manner in some embodiments of the present invention, as shown in fig. 1, to realize the speaker 100 having a stable magnetic field, the magnetic circuit assembly 2 includes a permanent magnet 21, a first magnetizer 22, and a second magnetizer 23. Wherein, first magnetizer 22 is equipped with recess 221 along the thickness direction of first magnetizer is concave, and permanent magnet 21 installs in recess 221, and second magnetizer 23 is placed on the top of permanent magnet 21, and forms magnetic gap 24 jointly between the periphery wall of second magnetizer 23 and the interior perisporium of recess 221, the periphery wall of permanent magnet 21. The magnetic gap 24 formed by the permanent magnet 21, the first magnetizer 22 and the second magnetizer 23 has a stable magnetic field to provide a certain magnetic force for the vibration of the voice coil 33, and the first magnetizer 22 and the second magnetizer 23 can maintain the direction and the strength of the formed magnetic field. It will be appreciated that, particularly in the present embodiment, the magnetic gap 24 is in the form of an annular groove structure. Preferably, the first magnetizer 22 may be a conventional U-iron, the permanent magnet 21 may be a magnet having a constant magnetic field, and the second magnetizer 23 is a washer, which may be of a conventional structure of the washer or a newly created structure.

Further, as a specific example of some embodiments of the present invention, as shown in fig. 1, in order to avoid collision of voice coil 33 with first and second magnetizers 22 and 23 while vibrating, magnetic fluid 4 includes inner fluid 41 and outer fluid 42. Wherein, the internal fluid 41 is positioned between the concave part 313 and the corresponding peripheral wall of the second magnetizer 23 in the magnetic gap 24; the external fluid 42 is located between the recess 313 and the inner circumferential wall of the corresponding first magnetizer 22 within the magnetic gap 24. The inner fluid 41 and the outer fluid 42 may provide a certain buffering effect for the vibration of the voice coil 33, wherein the inner fluid 41 and the outer fluid 42 may maintain the voice coil 33 to vibrate in the central direction, so as to prevent the voice coil 33 from colliding with the first magnetizer 22 and the second magnetizer 23 during the vibration, thereby avoiding the damage of the voice coil 33 or the abnormal sound generated by the speaker 100.

It can be understood that the inner fluid 41 and the outer fluid 42 both have magnetism, and the magnetic circuit flux can be increased in the magnetic gap 24, so as to avoid the situation of insufficient sound pressure generated by the speaker 100 due to insufficient magnetic circuit flux, so as to ensure that the speaker 100 has a lower minimum resonant frequency, and at the same time, to prolong the effective use time of the speaker 100.

Preferably, in the present embodiment, as shown in fig. 2, in order to better prevent the voice coil 33 from rubbing against the magnetic circuit assembly 2 in the magnetic gap 24, the thickness of the inner fluid 41 is in the range of 0.1mm to 0.25mm, and the thickness of the outer fluid 42 is in the range of 0.1mm to 0.25mm. Specifically, as shown in fig. 2, a is the thickness of the inner fluid 41, and B is the thickness of the outer fluid 42. The inner fluid 41 and the outer fluid 42 need to provide a certain buffering force for the vibrating voice coil 33, so that the voice coil 33 maintains the vibration in the central direction, and the voice coil 33 is prevented from colliding with the first magnetizer 22 and the second magnetizer 23 during the vibration, thereby realizing the stable and normal sound production of the speaker 100.

Further, as a specific implementation manner in some embodiments of the present invention, as shown in fig. 2, in order to accommodate the voice coil 33 in the magnetic gap 24, the thickness range of the voice coil 33 is 0.45mm to 0.55mm, and the transverse distance between the inner peripheral wall of the first magnetizer 22 and the outer peripheral wall of the second magnetizer 23 is 0.7mm to 1.0mm, that is, the transverse length range of the magnetic gap 24 is 0.7mm to 1.0mm. Specifically, as shown in fig. 2, C is the thickness of the voice coil 33, and D is the lateral length of the magnetic gap 24. When the magnetic gap 24 provides sufficient space for the voice coil 33 to vibrate, a space filled with the magnetic fluid 4 is also left, so that sufficient magnetic flux can be provided in the magnetic gap 24 to maintain the voice coil 33 to vibrate, and at the same time, the voice coil 33 can be ensured not to collide with the first magnetizer 22 and the second magnetizer 23 during vibration.

Further, as a specific implementation manner in some embodiments of the present invention, as shown in fig. 1, in order to accommodate the concave portion 313 of the vibration plate 31 in the magnetic circuit assembly 2, the concave portion 313 of the vibration plate 31 is of an annular structure and is sleeved on the periphery of the second magnetizer 23. Further, the center portion 311 of the diaphragm 31 is positioned on the top of the second magnetizer 23, and the center line of the center portion 311 and the center line of the second magnetizer 23 are positioned on the same straight line. The recess 313 of the diaphragm 31 has a ring-shaped configuration so that it is possible to facilitate confirmation of the placement position of the recess 313 of the diaphragm 31, i.e., the position where the voice coil 33 is disposed, during the assembly of the speaker 100, to reduce the assembly time. It is understood that the center line of the central portion 311 and the center line of the second magnetizer 23 are located on the same straight line, so that the installation position of the vibration plate 31 may be determined, and the magnetic field force received by each portion of the recess 313 disposed in the magnetic gap 24 may be the same.

Further, as a specific implementation manner in some embodiments of the present invention, as shown in fig. 1, in order to make the magnetic flux in the magnetic gap 24 be uniformly distributed, the outer peripheral wall of the second magnetizer 23 is flush with the outer peripheral wall of the permanent magnet 21, so that the centers of the second magnetizer 23 and the permanent magnet 21 can be kept on the same axis, and thus the magnitude of the acting force received when the voice coil 33 placed in the magnetic gap 24 vibrates can be made to be consistent, so as to keep stable vibration, and thus, the stability of the low-frequency sound pressure of the speaker 100 can be realized.

Further, as a specific implementation manner in some embodiments of the present invention, in order to maintain the stability of the sound pressure of the speaker 100, the vibration plate 31 is made of a material having a permeability for blocking the magnetic fluid 4, the vibration plate 31 does not absorb the magnetic fluid 4, and can effectively prevent the magnetic fluid 4 from leaking out of the vibration plate 31, and the magnetic fluid 4 can be used for a long time, so as to maintain the filling amount of the magnetic fluid 4 in the magnetic gap 24, achieve sufficient low-frequency sound pressure, and at the same time, make the service life of the speaker 100 longer.

Embodiment two of the speaker 100

The main technical features of the present embodiment are substantially the same as those of the first embodiment, and the main differences from the first embodiment are as follows:

as shown in fig. 4, in the second embodiment, in order to reduce the assembly process of the speaker 100 and facilitate the production and manufacture, the frame 11 and the U-iron are integrally formed, and the ring plate 6 is disposed between the hanging edge 32 and the frame 11. Wherein, the inner wall surface of the basin cavity 12 formed by the basin frame 11 is provided with a step surface, and the ring piece 6 is arranged on the step surface.

It can be understood that the hanging edge 32 is an elastic support and is also a flexible material, and in order to prevent the hanging edge 32 from being deformed when directly connected to the basin frame 11, in the embodiment, the hanging edge 32 is connected to the basin frame 11 through the connection with the ring plate 6, so that the hanging edge 32 can be stably combined with the basin frame 11.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A loudspeaker, characterized in that the loudspeaker comprises:

the support assembly comprises a basin frame, a basin cavity is formed on the basin frame, and a mounting hole communicated with the basin cavity is formed in the basin frame;

the magnetic circuit assembly is arranged on the basin frame at a position corresponding to the mounting hole, a magnetic gap with a magnetic field is formed, and the magnetic gap is communicated with the basin cavity;

the vibration assembly is arranged on the basin frame and comprises a vibration plate, a suspension edge and a voice coil, the vibration plate comprises a central part, an outer peripheral part and a concave part, one end of the suspension edge is arranged on the basin frame, and the vibration plate is connected with the other end of the suspension edge through the outer peripheral part so as to be arranged on the basin frame; the recess is formed between the central portion and the outer peripheral portion, is recessed toward the basin cavity, and is inserted into the magnetic gap;

wherein the speaker further comprises a magnetic fluid disposed within the magnetic gap around a peripheral wall of the recess; the voice coil is accommodated in the recess at the outer side of the vibration plate, and under the action of a magnetic field in the magnetic gap, the voice coil can drive the vibration plate to reciprocate along the depth direction of the magnetic gap.

2. The speaker of claim 1, wherein a lead wire connected to an external circuit is led out from the voice coil, and the lead wire is routed along an outer wall surface of the diaphragm.

3. The loudspeaker of claim 1, wherein the magnetic circuit assembly comprises a permanent magnet, a first magnetizer and a second magnetizer, the first magnetizer is provided with a groove along the thickness direction thereof, the permanent magnet is installed in the groove, the second magnetizer is placed on the top of the permanent magnet, and the outer peripheral wall of the second magnetizer, the inner peripheral wall of the groove and the outer peripheral wall of the permanent magnet jointly form the magnetic gap.

4. A loudspeaker according to claim 3, wherein the magnetic fluid comprises an inner fluid and an outer fluid, the inner fluid being within the magnetic gap between the recess and the corresponding peripheral wall of the second magnetic conductor; the external fluid is located between the concave portion and the inner peripheral wall of the corresponding first magnetizer in the magnetic gap.

5. The loudspeaker of claim 4, wherein the thickness of said internal fluid is in the range of 0.1mm to 0.25mm; the thickness range of the external fluid is 0.1 mm-0.25 mm.

6. A loudspeaker according to claim 3, wherein the voice coil has a thickness in the range 0.45mm to 0.55mm; the transverse distance range between the inner peripheral wall of the first magnetizer and the outer peripheral wall of the second magnetizer is 0.7 mm-1.0 mm.

7. The loudspeaker according to claim 3, wherein the recess of the vibration plate is of an annular structure and is sleeved on the periphery of the second magnetizer; the central part of the vibrating plate is positioned at the top of the second magnetizer, and the central line of the central part and the central line of the second magnetizer are positioned on the same straight line.

8. A loudspeaker according to claim 3, wherein the outer peripheral wall of the second magnetic conductor is flush with the outer peripheral wall of the permanent magnet.

9. The speaker of claim 1, wherein the vibration plate is made of a material having a barrier property against permeability of a magnetic fluid.

10. A headset characterized in that it comprises a loudspeaker according to any one of claims 1 to 9.

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