CN110891231A

CN110891231A - Amplitude adjustable micro loudspeaker

Info

Publication number: CN110891231A
Application number: CN201911178241.4A
Authority: CN
Inventors: 董庆宾; 朱威; 解佑军
Original assignee: Shenzhen Sunway Acoustics Technology Co Ltd
Current assignee: Shenzhen Sunway Acoustics Technology Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-03-17

Abstract

The invention discloses an amplitude-adjustable micro loudspeaker, which comprises a loudspeaker single body, wherein central magnetic steel is arranged in the loudspeaker single body, and the micro loudspeaker also comprises an electromagnet assembly arranged outside the loudspeaker single body, wherein the electromagnet assembly is arranged corresponding to the central magnetic steel. The free outside of speaker sets up electromagnet assembly, and the polarity through adjusting electromagnet assembly and magnetic force size can change the whole BL of miniature speaker vibration subassembly and drive the size of power to ensure that miniature speaker vibration subassembly can reach rated amplitude, avoid miniature speaker to appear the distortion at the during operation, do benefit to the acoustic performance of guaranteeing miniature speaker, reinforcing user experience.

Description

Amplitude adjustable micro loudspeaker

Technical Field

The invention relates to the technical field of electroacoustic transducers, in particular to an amplitude-adjustable micro loudspeaker.

Background

The micro loudspeaker generally comprises a basin frame, a magnetic circuit component and a vibration component, wherein the magnetic circuit component and the vibration component are respectively arranged on the basin frame, the vibration component comprises a voice coil and a vibrating diaphragm which are connected, and the vertical jumping amplitude of the vibration component during working is amplitude.

The amplitude of the existing micro-speaker sometimes does not reach or exceed the rated amplitude, which causes the sound distortion of the micro-speaker and seriously affects the acoustic performance of the micro-speaker.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: an amplitude adjustable micro-speaker is provided.

In order to solve the technical problems, the invention adopts the technical scheme that: the micro loudspeaker with the adjustable amplitude comprises a loudspeaker monomer, wherein central magnetic steel is arranged in the loudspeaker monomer, and the micro loudspeaker further comprises an electromagnet assembly arranged outside the loudspeaker monomer, wherein the electromagnet assembly corresponds to the central magnetic steel.

The invention has the beneficial effects that: the free outside of speaker sets up electromagnet assembly, and the polarity through adjusting electromagnet assembly and magnetic force size can change the whole BL of miniature speaker vibration subassembly and drive the size of power to ensure that miniature speaker vibration subassembly can reach rated amplitude, avoid miniature speaker to appear the distortion at the during operation, do benefit to the acoustic performance of guaranteeing miniature speaker, reinforcing user experience.

Drawings

Fig. 1 is an exploded view of a micro-speaker with adjustable amplitude according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view of an amplitude tunable micro-speaker according to a first embodiment of the present invention;

fig. 3 is a cross-sectional view of an amplitude tunable micro-speaker according to another configuration of an embodiment of the present invention.

Description of reference numerals:

1. a speaker unit;

2. central magnetic steel;

3. an electromagnet assembly;

4. a magnetic bowl;

5. vibrating diaphragm;

6. a support;

7. a housing hole;

8. a circuit board;

9. a limiting groove;

10. an iron core;

11. a coil;

12. and (4) a ball top.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

The most key concept of the invention is as follows: the size of the whole BL driving force of the vibration assembly on the loudspeaker monomer is changed by controlling the electromagnet assembly located outside the loudspeaker monomer, so that the amplitude of the vibration assembly is corrected, and the acoustic performance of the miniature loudspeaker is guaranteed.

Referring to fig. 1 to 3, the amplitude-adjustable micro speaker includes a speaker unit 1, a central magnetic steel 2 is disposed in the speaker unit 1, and an electromagnet assembly 3 disposed outside the speaker unit 1, where the electromagnet assembly 3 is disposed corresponding to the central magnetic steel 2.

From the above description, the beneficial effects of the present invention are: the outside of speaker monomer 1 sets up electromagnet assembly 3, and the polarity through adjusting electromagnet assembly and magnetic force size can change the whole BL of miniature speaker vibration subassembly drive power's size to ensure that miniature speaker vibration subassembly can reach rated amplitude, avoid miniature speaker to appear the distortion at the during operation, do benefit to the acoustic performance of guaranteeing miniature speaker, reinforcing user experience.

Further, the speaker unit 1 includes a diaphragm 5, and the electromagnet assembly 3 is located on one side of the diaphragm 5 away from the central magnetic steel 2.

As can be seen from the above description, the electromagnet assembly 3 may be disposed on top of the speaker unit 1.

Further, the electromagnetic component comprises a bracket 6, wherein the bracket 6 is provided with a containing hole 87 for containing the electromagnetic component 3.

Further, the bracket 6 is connected to the speaker unit 1.

As can be seen from the above description, the bracket 6 can be used to protect the electromagnet assembly 3 and also to provide a mounting location for the electromagnet assembly 3.

Furthermore, the loudspeaker unit 1 comprises a magnetic bowl 4, and the electromagnet assembly 3 is located on one side of the magnetic bowl 4 far away from the central magnetic steel 2.

As can be seen from the above description, the electromagnet assembly 3 may be disposed at the bottom of the speaker unit 1.

Further, the electromagnet assembly 3 comprises an iron core 10 and a coil 11 wound around the iron core 10, and the iron core 10 is connected with the magnetic bowl 4.

As can be seen from the above description, the electromagnet assembly 3 is simple in structure and easy to manufacture.

Further, the magnetic bowl 4 and the iron core 10 are integrally formed.

Further, the magnetic bowl 4 is connected with the iron core 10 through gluing, buckling, screwing or screwing.

As can be seen from the above description, the connection mode between the iron core 10 and the magnetic bowl 4 is various, and the manufacturer can select the connection mode according to actual needs.

Furthermore, the electromagnet assembly 3 is arranged corresponding to the central area of the central magnetic steel 2.

As can be seen from the above description, the electromagnet assembly 3 is disposed corresponding to the central region of the central magnetic steel 2, so as to better adjust the magnitude of the overall BL driving force, i.e. better correct the amplitude of the micro-speaker.

Further, the electromagnetic vibration absorber further comprises a controller and an amplitude monitoring device, wherein the controller is electrically connected with the amplitude monitoring device and the electromagnet assembly 3 respectively.

From the above description, the amplitude of the vibration component of the micro-speaker can be corrected in real time, and the acoustic performance of the micro-speaker can be further ensured.

Example one

Referring to fig. 1 to fig. 3, a first embodiment of the present invention is: please refer to fig. 1 and fig. 2, a micro speaker with adjustable amplitude includes a housing (not shown), a speaker unit 1 disposed in the housing, a central magnetic steel 2 disposed in the speaker unit 1, and an electromagnet assembly 3 disposed outside the speaker unit 1, wherein the electromagnet assembly 3 is disposed corresponding to the central magnetic steel 2, and the electromagnet assembly 3 is connected to the speaker unit 1 or an inner side wall of the housing.

Loudspeaker monomer 1 includes magnetic bowl 4 and vibrating diaphragm 5, electromagnet assembly 3 is located magnetic bowl 4 is kept away from one side of central magnet steel 2, perhaps, electromagnet assembly 3 is located vibrating diaphragm 5 is kept away from one side of central magnet steel 2.

The micro loudspeaker further comprises a support 6 arranged in the shell, the support 6 is provided with a containing hole 87 used for containing the electromagnet assembly 3, the support 6 is connected to the loudspeaker single body 1 or the shell, in order to enable the support 6 to provide sufficient protection for the electromagnet assembly 3, the depth of the containing hole 87 is larger than the height of the electromagnet assembly 3, and preferably, the thickness of the support 6 is larger than the height of the electromagnet assembly 3. The support 6 is provided with a conductive circuit connected with the electromagnet assembly 3, and further preferably, the support 6 is provided with a circuit board, the conductive circuit is arranged on the circuit board, and the circuit board comprises but is not limited to an FPC board and a PCB board. In detail, the bracket 6 is further provided with a limit groove 9 matched with the circuit board.

Specifically, the electromagnet assembly 3 comprises an iron core 10 and a coil 11 wound around the iron core 10, and the iron core 10 is connected with the magnetic bowl 4. Optionally, as shown in fig. 3, the magnetic bowl 4 and the iron core 10 are integrally formed, and the processing method of integrally forming the magnetic bowl 4 and the iron core 10 includes, but is not limited to, milling, stamping, and the like; alternatively, as shown in fig. 2, the magnetic bowl 4 is connected to the iron core 10 by gluing, snapping, screwing or screwing.

Preferably, the electromagnet assembly 3 corresponds to the central area of the central magnetic steel 2, so that the overall BL driving force is more balanced, and the acoustic performance of the micro-speaker is further improved.

It is easy to understand that although the number of electromagnet assemblies 3 is only one in the present embodiment, the case where a plurality of electromagnet assemblies 3 are present in other embodiments is not excluded.

The micro-speaker may correct the amplitude of the vibration module before shipment, or may correct the amplitude of the vibration module in real time during use. In detail, after the micro speaker is corrected before leaving the factory, the conduction state of the electromagnet assembly 3 and the conduction state of the voice coil in the speaker unit 1 are always kept synchronous in the use process of the micro speaker, specifically, the swing condition of the micro speaker can be detected through a Klippel test system, and then the setting number, the position, the polarity, the magnetic force and the like of the electromagnet assembly 3 are adjusted; the amplitude correction of the vibration assembly is carried out before delivery, so that the rejection rate of the micro loudspeaker can be reduced, and the production resources are saved. When the vibration component amplitude is corrected in real time in the using process of the micro loudspeaker, the micro loudspeaker further comprises a controller and an amplitude monitoring device, and the controller is electrically connected with the amplitude monitoring device and the electromagnet component 3 respectively. The controller can be arranged in the shell or outside the shell, the amplitude monitoring device can be arranged in the shell, the controller can select a CPU (central processing unit) platform or a PA (power amplifier) DSP (digital signal processor) platform, and the controller is used for receiving real-time monitoring data from the amplitude monitoring device and controlling the electromagnet assembly 3 to work according to the received real-time monitoring data; the amplitude monitoring device can be a distance measuring sensor for monitoring the dome 12 on the vibrating diaphragm 5 or a capacitor plate arranged on the dome 12 and the shell, and is used for detecting the vibration state of the dome 12 in real time through the change of the distance between the capacitor plate and the shell, and the amplitude monitoring device is used for monitoring the amplitude of the vibration component of the micro loudspeaker in real time to obtain real-time monitoring data and sending the real-time monitoring data to the controller; the vibration amplitude of the vibration component in the micro loudspeaker can be corrected in real time, so that the acoustic performance and the service life of the micro loudspeaker are greatly improved.

It should be noted that the micro-speaker of the present embodiment can be formed to be equivalent to a receiver, and the receiver adopting the technical solution also belongs to the protection scope of the present patent.

In conclusion, the amplitude-adjustable micro loudspeaker provided by the invention can correct the amplitude of the vibration component in advance or in real time, improves the working stability of the micro loudspeaker, avoids sound distortion when the micro loudspeaker works, and is beneficial to ensuring the acoustic performance of the micro loudspeaker.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims

1. Amplitude adjustable miniature speaker, including the speaker monomer, be equipped with central magnet steel in the speaker monomer, its characterized in that: the loudspeaker further comprises an electromagnet assembly arranged outside the loudspeaker single body, and the electromagnet assembly is arranged corresponding to the central magnetic steel.

2. The miniature loudspeaker of claim 1, wherein: the loudspeaker monomer comprises a vibrating diaphragm, and the electromagnet assembly is located on one side, far away from the central magnetic steel, of the vibrating diaphragm.

3. The miniature loudspeaker of claim 1, wherein: the electromagnetic component fixing device is characterized by further comprising a support, wherein a containing hole used for containing the electromagnetic component is formed in the support.

4. The micro loudspeaker of claim 3, wherein: the bracket is connected to the speaker unit.

5. The miniature loudspeaker of claim 1, wherein: the loudspeaker unit comprises a magnetic bowl, and the electromagnet assembly is located on one side, away from the central magnetic steel, of the magnetic bowl.

6. The miniature loudspeaker of claim 5, wherein: the electromagnet assembly comprises an iron core and a coil wound on the iron core, and the iron core is connected with the magnetic bowl.

7. The miniature loudspeaker of claim 6, wherein: the magnetic bowl and the iron core are integrally formed.

8. The miniature loudspeaker of claim 6, wherein: the magnetic bowl is connected with the iron core in an adhesive manner, a clamping manner, a threaded manner or a screw manner.

9. The miniature loudspeaker of claim 1, wherein: the electromagnet assembly is arranged corresponding to the central area of the central magnetic steel.

10. The miniature loudspeaker of claim 1, wherein: the vibration amplitude monitoring device is characterized by further comprising a controller and an amplitude monitoring device, wherein the controller is electrically connected with the amplitude monitoring device and the electromagnet assembly respectively.