CN213880250U

CN213880250U - Loudspeaker

Info

Publication number: CN213880250U
Application number: CN202022726907.XU
Authority: CN
Inventors: 李垒
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-08-03
Anticipated expiration: 2030-11-23

Abstract

The application relates to the technical field of speakers, and discloses a speaker, the speaker includes: a first magnet; a second magnet; a diaphragm assembly including a third magnet and a diaphragm coupled to the third magnet; and the shell is provided with a cavity, the first magnet, the vibrating diaphragm component and the second magnet are sequentially arranged in the cavity at intervals, the first magnet and the second magnet are connected to the cavity, and the third magnet respectively acts with the first magnet and the second magnet to enable the vibrating diaphragm component to suspend. This scheme passes through vibrating diaphragm subassembly suspension and sets up in the cavity, avoids the vibration range of vibrating diaphragm to receive the restriction, the sensitivity of vibrating diaphragm when helping improving the high frequency and tearing of vibrating diaphragm when preventing the low frequency.

Description

Loudspeaker

Technical Field

The utility model relates to a speaker technical field, concretely relates to speaker.

Background

A speaker is a transducer device for converting an electrical signal into an acoustic signal, and at present, a speaker is classified into: an equal magnetic speaker, a moving coil speaker, a piezoelectric speaker, and an electrostatic speaker.

The loudspeaker comprises a vibrating diaphragm and a magnetic yoke, wherein the vibrating diaphragm is a flexible film, and the magnetic yoke is arranged on one side or two sides of the vibrating diaphragm respectively. While the diaphragm is typically fixed to the housing of the loudspeaker, the diaphragm is stationary relative to the housing.

The above-described speaker structure allows the vibration amplitude of the diaphragm to be restricted or limited.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a speaker.

The utility model provides a loudspeaker, include:

a first magnet;

a second magnet;

a diaphragm assembly including a third magnet and a diaphragm coupled to the third magnet; and

the casing is equipped with the cavity, first magnet, the vibrating diaphragm subassembly reaches the second magnet is separated by in proper order and is set up in the cavity, first magnet with the second magnet is connected to the cavity, the third magnet respectively with first magnet, the second magnet acts on so that the vibrating diaphragm subassembly suspends.

In one embodiment, the third magnet is arranged to be repelled from the first magnet and the third magnet is arranged to be repelled from the second magnet.

In one embodiment, the diaphragm assembly further includes a plurality of coils, and the coils are disposed on the edge of the diaphragm.

In one embodiment, the coil is arranged in a ring shape on the diaphragm.

In one embodiment, the housing is further provided with at least two communication holes to enable the diaphragm assembly to be slidably fitted with the cavity.

In one embodiment, the diaphragm assembly divides the cavity into a first portion and a second portion, one of the communication holes being located in the first portion and the other communication hole being located in the second portion.

In one embodiment, the communication hole diameter of the first portion is not equal to the communication hole diameter of the second portion.

In one embodiment, the first magnet is provided with a first through hole, and the first through hole is arranged opposite to the diaphragm, so that the orthographic projection of the first through hole covers the diaphragm.

In one embodiment, the second magnet is provided with a second through hole, and the second through hole is arranged opposite to the diaphragm, so that the orthographic projection of the second through hole covers the diaphragm.

In one embodiment, the third magnet includes a plastic member and a magnetic layer coated on the plastic member.

Compared with the prior art, the beneficial effects of the utility model are that:

according to the scheme, the vibrating diaphragm component is arranged in the cavity in a suspending manner, so that the vibration amplitude of the vibrating diaphragm is prevented from being limited, the sensitivity of the vibrating diaphragm at high frequency is improved, and the vibrating diaphragm is prevented from being torn at low frequency; the coil is arranged at the edge of the vibrating diaphragm, so that the vibrating diaphragm is prevented from being hard due to the arrangement of the coil in the middle of the vibrating diaphragm, and the vibrating diaphragm responds sensitively at high frequency; the vibrating diaphragm component is in sliding fit with the shell, and the vibration amplitude of the vibrating diaphragm during low frequency is improved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 is a schematic structural diagram of a loudspeaker according to an embodiment of the present application;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a sectional view taken along line B-B of FIG. 1;

fig. 4 is a schematic structural view of a first magnet or a second magnet according to an embodiment of the present application.

In fig. 1 to 4: 10-shell, 11-first communication hole, 12-second communication hole, 20-first magnet, 21-first through hole, 30-second magnet, 31-second through hole, 40-diaphragm component, 41-diaphragm, 42-third magnet, and 43-coil.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1 shows a schematic structural diagram of a speaker provided in the present application.

A speaker includes: a first magnet 20, a second magnet 30, a diaphragm assembly 40 and a housing 10. The diaphragm assembly 40 includes a third magnet 42 and a diaphragm 41 coupled to the third magnet 42. The casing 10 has a cavity, and the first magnet 20, the diaphragm assembly 40 and the second magnet 30 are sequentially disposed in the cavity at intervals. The first magnet 20 and the second magnet 30 are connected to the chamber; the third magnet 42 acts with the first magnet 20 and the second magnet 30, respectively, to levitate the diaphragm assembly 40.

A first acting force exists between the first magnet 20 and the third magnet 42, a second acting force exists between the second magnet 30 and the third magnet 42, the second acting force is equal to the first acting force in magnitude and opposite in direction, so that the third magnet 42 can be suspended in the cavity, and the diaphragm assembly 40 is suspended in the cavity.

Compared with the prior art, the vibrating diaphragm assembly 40 of the present application is suspended in the cavity, so that the vibration amplitude of the vibrating diaphragm 41 is prevented from being limited, the sensitivity of the vibrating diaphragm 41 is improved when the high frequency is facilitated, and the tearing of the vibrating diaphragm 41 is prevented when the low frequency is prevented.

In the present embodiment, the third magnet 42 and the first magnet 20 are disposed in a manner of being repelled, and the third magnet 42 and the second magnet 30 are disposed in a manner of being repelled.

Referring to fig. 1, the first magnet 20, the diaphragm assembly 40 and the second magnet 30 are sequentially disposed in the cavity at intervals. The first magnet 20 and the second magnet 30 are coupled to the cavity, and the diaphragm assembly 40 includes a third magnet 42.

The S-pole of the first magnet 20 is disposed toward the S-pole of the third magnet 42 such that the first magnet 20 and the third magnet 42 are disposed in opposition, and a first force developed between the first magnet 20 and the third magnet 42 pushes the third magnet 42 to the left. The N pole of the second magnet 30 is disposed toward the N pole of the third magnet 42 such that the second magnet 30 and the third magnet 42 are disposed in opposition, and a second force between the second magnet 30 and the third magnet 42 pushes the third magnet 42 to the right. The first acting force and the second acting force are equal in magnitude and opposite in direction, so that the third magnet 42 is suspended in the cavity, and the diaphragm assembly 40 is suspended in the cavity.

It should be noted that, the N pole of the first magnet 20 is disposed toward the N pole of the third magnet 42, and the S pole of the second magnet 30 is disposed toward the S pole of the third magnet 42, so that the third magnet 42 can be suspended in the cavity, and the diaphragm assembly 40 is suspended in the cavity.

In this embodiment, the diaphragm assembly 40 further includes a plurality of coils 43, and the coils 43 are disposed on the edge of the diaphragm 41.

Referring to fig. 1 to 3, the diaphragm assembly 40 includes a diaphragm 41, a third magnet 42, and a plurality of coils 43. The cross-section of the cavity is circular, the third magnet 42 is of an annular structure, the outer diameter of the third magnet 42 is equal to the diameter of the cavity, and the third magnet 42 is in clearance fit with the cavity. The diaphragm 41 has a circular shape, and the diaphragm 41 is attached to the inner periphery of the third magnet 42 such that the axis of the third magnet 42 passes through the center of the diaphragm 41. The coil 43 is substantially spring-like. The coil 43 is fixedly attached to the edge of the diaphragm 41. The axis of the coil 43 is parallel to the axis of the third magnet 42, with one outlet end of the coil 43 facing the first magnet 20 and the other outlet end of the coil 43 facing the second magnet 30. Two outlet ends of the coil 43 respectively penetrate through the housing 10 and are electrically connected with the signal line.

The coil 43 is arranged in a manner that the diaphragm 41 is prevented from being hard due to the fact that the coil 43 is arranged in the middle of the diaphragm 41, and therefore the diaphragm 41 responds sensitively at high frequency.

Further, a plurality of coils 43 are uniformly distributed at equal angles with respect to the center of the diaphragm 41 at the edge position of the diaphragm 41. When power is transmitted to the coil 43 through the signal line, the coil 43 forms a magnetic field, the coil 43 reacts with the first magnet 20, and the coil 43 reacts with the second magnet 30, so that the diaphragm 41 vibrates left and right, and the speaker outputs an acoustic signal. The coils 43 are uniformly distributed on the vibrating diaphragm 41 at equal angles, so that the vibrating diaphragm 41 can vibrate, and the loudspeaker can convert the electric signals into acoustic signals.

Further, the housing 10 is provided with a first communication hole 11 and a second communication hole 12. The diaphragm assembly 40 divides the cavity into a first part C and a second part D, the first communication hole 11 is located in the first part C, and the first communication hole 11 is used for communicating the first part C with the atmosphere space outside the housing 10; the second communication hole 12 is located in the second portion D, and the second communication hole 12 is used to communicate the second portion D with the atmosphere space outside the housing 10. Wherein the first magnet 20 is located in the first portion C and the second magnet 30 is located in the second portion D.

When power is transmitted to the coil 43 through the signal line, the coil 43 forms a magnetic field, the coil 43 reacts with the first magnet 20 to change the magnitude of the first acting force, and the coil 43 reacts with the second magnet 30 to change the magnitude of the second acting force. First effort and second effort are different in size for vibrating diaphragm subassembly 40 slides along the casing 10 inner wall right, otherwise, vibrating diaphragm subassembly 40 slides along the casing 10 inner wall left, realizes vibrating diaphragm subassembly 40 and casing 10 sliding fit, is favorable to improving the vibration range of vibrating diaphragm 41 when the low frequency.

As described above, the third magnet 42 includes a plastic part and a magnetic layer coated on the plastic part, so as to reduce the overall weight of the diaphragm assembly 40, and facilitate the sliding of the diaphragm assembly 40 along the inner wall of the housing 10.

Further, the first communication hole 11 located in the first section C is a circular hole, the second communication hole 12 located in the second section D is a circular hole, and the diameter of the first communication hole 11 is larger than that of the second communication hole 12. The first communication hole 11 serves as a sound outlet hole for sound to be transmitted.

In this embodiment, the first magnet 20 is provided with a first through hole 21, and the first through hole 21 is disposed opposite to the diaphragm 41, so that an orthographic projection of the first through hole 21 covers the diaphragm 41. The second magnet 30 is provided with a second through hole 31, and the second through hole 31 is disposed opposite to the diaphragm 41, so that an orthographic projection of the second through hole 31 covers the diaphragm 41.

Referring to fig. 1 and 4, the cavity is circular in cross-section. The first magnet 20 has a ring structure, and the first magnet 20 is provided with a first through hole 21. The outer diameter of the first magnet 20 is equal to the diameter of the cavity, the first magnet 20 is in transition fit with the cavity, and the first magnet 20 is fixed on the cavity. The second magnet 30 has a ring structure, and the second magnet 30 is provided with a second through hole 31. The outer diameter of the second magnet 30 is equal to the diameter of the cavity, the second magnet 30 is in transition fit with the cavity, and the second magnet 30 is fixed on the cavity.

The diaphragm assembly 40 is suspended between the first magnet 20 and the second magnet 30, and both the axis of the first magnet 20 and the axis of the second magnet 30 pass through the center of the diaphragm 41. The first through hole 21 of the first magnet 20 is disposed opposite to the diaphragm 41 such that an orthographic projection of the first through hole 21 covers the diaphragm 41. When the diaphragm 41 vibrates, the sound wave formed by the diaphragm 41 passes through the first through hole 21, so that the blocking of the sound wave by the first magnet 20 is reduced, and the loudness of sound of the loudspeaker is improved.

Similarly, the second through hole 31 of the second magnet 30 is disposed opposite to the diaphragm 41 such that an orthographic projection of the second through hole 31 covers the diaphragm 41. When the diaphragm 41 vibrates, the sound wave formed by the diaphragm 41 passes through the second through hole 31, so that the blocking of the sound wave by the second magnet 30 is reduced, and the loudness of sound of the loudspeaker is improved.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the disclosure. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A loudspeaker, comprising:

a first magnet;

a second magnet;

2. The loudspeaker of claim 1, wherein said third magnet is disposed in opposition to said first magnet and said third magnet is disposed in opposition to said second magnet.

3. The loudspeaker of claim 1, wherein the diaphragm assembly further comprises a plurality of coils, the coils being disposed at an edge of the diaphragm.

4. A loudspeaker as claimed in claim 3, characterized in that the coil is arranged annularly to the diaphragm.

5. A loudspeaker according to claim 3, wherein the housing is further provided with at least two communication holes to enable the diaphragm assembly to be slidably fitted to the cavity.

6. A loudspeaker as claimed in claim 5, wherein the diaphragm assembly divides the chamber into a first portion and a second portion, one of the communication holes being located in the first portion and the other communication hole being located in the second portion.

7. The speaker according to claim 6, wherein the diameter of the communication hole of the first portion is not equal to the diameter of the communication hole of the second portion.

8. The loudspeaker according to any one of claims 1 to 7, wherein the first magnet is provided with a first through hole, the first through hole being disposed opposite the diaphragm such that an orthographic projection of the first through hole covers the diaphragm.

9. The loudspeaker according to any one of claims 1 to 7, wherein the second magnet is provided with a second through hole, the second through hole being disposed opposite the diaphragm such that an orthographic projection of the second through hole covers the diaphragm.

10. The loudspeaker of any one of claims 1 to 7, wherein the third magnet comprises a plastic member and a magnetic layer coated on the plastic member.