WO2017193447A1

WO2017193447A1 - Loudspeaker and electronic device configured with the loudspeaker

Info

Publication number: WO2017193447A1
Application number: PCT/CN2016/086011
Authority: WO
Inventors: 李国亮
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-05-13
Filing date: 2016-06-16
Publication date: 2017-11-16
Also published as: CN107371105A

Abstract

Published are a loudspeaker and an electronic device configured with the loudspeaker. The loudspeaker comprises: a housing and a voice diaphragm (2) arranged within the housing. The loudspeaker further comprises a first coil (3) and a second coil (7) arranged within the housing to drive the vibration of the voice diaphragm (2).

Description

Speaker and electronic device equipped with the same

Technical field

The present application relates to, but is not limited to, the field of electroacoustic products, and more particularly to a microspeaker and an electronic device equipped with the speaker.

Background technique

At present, the speakers used in terminal products are speakers with magnetic steel or permanent magnets. The use of such speakers on wireless products has an impact on the wireless performance of the products. At the same time, the speaker with magnetic steel or permanent magnet is currently used in a high-concentration iron powder environment. Even if it is well dust-proofed, the short-circuit of the speaker due to the magnetization of the iron powder may still be burnt out. risks of.

A speaker having a magnetic steel or a permanent magnet in the related art is used in a high-concentration iron powder environment, and an effective solution has not been proposed due to the problem that the speaker short-circuit is burnt due to the magnetization of the iron powder.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

Embodiments of the present invention provide a speaker that pushes the vibration of a speaker sound film by an electromagnetic field force generated by a coil, thereby vibrating the sound film instead of other permanent magnets such as magnetic steel.

According to an aspect of an embodiment of the present invention, a speaker includes: a housing, a sound film disposed in the housing, the speaker further includes a first coil and a second coil disposed in the housing to drive the sound film to vibrate .

Optionally, the housing of the speaker comprises a top cover, a bracket, and a bottom plate, wherein the top cover fixes the sound film and the first coil to the upper portion of the bracket, and the second coil and the bottom plate are sequentially fixed to the lower portion of the bracket to be in the shell A sound cavity is formed in the body.

Optionally, the speaker further comprises: a first insulating layer between the first coil and the bracket.

Optionally, the speaker further comprises: a second insulating layer between the second coil and the bracket.

Alternatively, the first insulating layer and/or the second insulating film layer is an organic or inorganic insulating film.

Optionally, the speaker further comprises: a wiring pin, and the wiring pin is disposed on the bottom plate.

Optionally, the wiring pin comprises four pin springs respectively disposed on four corners of the bottom plate, wherein the two pin springs are respectively connected with the two terminals of the first coil, and the other two pin springs are respectively respectively Connected to the two terminals of the second coil.

Optionally, the first coil and/or the second coil are wound from an insulated enameled wire or copper wire or copper foil.

Optionally, a plurality of sound holes are formed in the bottom plate.

Optionally, the bottom plate is made of an insulating material.

Alternatively, the sound film is fixed to the first coil by dispensing or ultrasonic welding, and/or the second coil is fixed to the bottom plate by dispensing or ultrasonic welding.

Optionally, in the operating state, the first electromagnetic field generated by the first coil and the second electromagnetic field generated by the second coil are coupled to each other to drive the diaphragm vibration.

Optionally, the first electromagnetic field is an N/S alternating electromagnetic field generated by a pulsed current in the first coil, and the second electromagnetic field is an N/S constant electromagnetic field generated by a fixed current flow in the second coil.

Optionally, the second coil is wound by an insulating enamel, the bottom plate is a steel sheet, and the bottom plate has an opening, and the part of the steel piece of the opening is connected to the bottom plate and bent inward to fix the second coil.

According to another aspect of an embodiment of the present invention, there is provided an electronic device in which a speaker described in the foregoing is provided.

Optionally, the foregoing electronic device includes but is not limited to a mobile terminal or a wearable device.

In the embodiment of the present invention, since the speaker is driven by pure electric electricity, no magnetic field is generated when the speaker is not working, thereby reducing the influence on the wireless signal when the speaker is not working, and also solving the speaker pair height. The problem of iron powder magnetization in a concentrated iron powder environment reduces or avoids the risk of speaker short-circuit burnout in high-concentration iron powder environments.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is an exploded view of a four-phase pure electric speaker according to an embodiment of the present invention;

2 is a schematic diagram of a speaker wiring pin according to an embodiment of the present invention;

3 is a schematic diagram showing the principle equivalent diagram of a four-phase pure electric speaker and a coil connection point according to an embodiment of the present invention;

4 is a schematic view showing the resultant force of a sound film coil according to an embodiment of the present invention;

5 is a schematic diagram of a current of a sound film coil and a change of a moving direction of a sound film according to an embodiment of the present invention;

Figure 6 is an exploded view of a sound film construction in accordance with an embodiment of the present invention;

Figure 7 is a perspective view and a partial enlarged view of a sound film coil according to an embodiment of the present invention;

Figure 8 is an exploded view of a bottom plate construction in accordance with an embodiment of the present invention;

Figure 9 is a perspective view and a layout enlarged view of a bottom plate structure according to an embodiment of the present invention;

Figure 10 is a cross-sectional view showing a wiring of a speaker base plate coil and an enlarged partial view thereof according to an embodiment of the present invention;

Figure 11 is a cross-sectional view showing a wiring of a speaker sound film coil and an enlarged partial view of the same according to an embodiment of the present invention;

FIG. 12 is a cross-sectional view and a partial enlarged view of a speaker coil wiring according to an embodiment of the present invention; FIG.

FIG. 13 is a schematic diagram of a speaker effect according to an embodiment of the present invention; FIG.

FIG. 14 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Embodiments of the invention

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

It should be noted that the terms "first", "second" and the like in the specification and claims of the present specification and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. order.

In the embodiment of the present invention, the vibration of the speaker sound film is mainly driven by the electromagnetic field force, thereby vibrating the sound film instead of other permanent magnets such as magnetic steel.

As shown in FIG. 1 to FIG. 13 , an embodiment of the present invention provides a four-phase pure electric speaker, which mainly includes a top cover 1 , a speaker sound film 2 , and a sound film coil 3 (in the present invention). Also referred to as a first coil in the embodiment, a speaker insulating film 4 (also referred to as a first insulating layer in the embodiment of the present invention), a speaker holder 5, and a bottom insulating layer 6 (also referred to as a first embodiment in the present embodiment) Two insulating layers), a bottom plate coil 7 (also referred to as a second coil in the embodiment of the present invention), a speaker backplane 8, and nine portions of the pin 9, wherein the sound film coil 3 and the bottom plate coil 7 are the main components constituting the speaker driving system. section.

The top cover 1 of the speaker is used to fix the speaker sound film 2 and the speaker insulating film 4 on the speaker bracket 5; the main purpose is to protect the sound film vibration and avoid damage to other objects during the speaker packing and assembly process, and at the same time It is also possible to reserve a vibration space in the vibration after the speaker is assembled.

As shown in FIGS. 6-7, the speaker sound film portion mainly comprises three parts: a speaker sound film 2, a sound film coil 3 and a speaker insulating film 4, wherein the speaker sound film 2 is a main sounding portion, and the sound film coil 3 is The portion of the driving force of the speaker vibration, the speaker insulating film 4 is for preventing a short circuit phenomenon caused by the collision of the diaphragm coil 3 and the bottom plate coil 7 during vibration.

The speaker stand 5 is a supporter of the overall frame of the speaker, and mainly fixes the speaker sound film 2, the speaker bottom plate 8, the speaker pin 9, and the like.

As shown in FIGS. 8-10 and FIG. 13, the bottom plate portion of the speaker mainly includes three parts of the bottom plate insulating layer 6, the bottom plate coil 7, and the speaker bottom plate 8, and the bottom plate of the four speakers on the bottom plate 8 of the speaker is sounded. Hole 14. The bottom plate insulating layer 6 is mainly for preventing the speaker short circuit caused by the contact between the sound film coil 3 and the bottom plate coil 7 when the speaker is vibrating, and the bottom plate coil 7 is the second part of the speaker driving force, which is the basis for ensuring the vibration of the speaker, and the speaker bottom plate 8 It is an important part of the bottom of the speaker. Its main function is to fix the bottom plate coil and enhance the structural strength of the bottom of the speaker.

As shown in FIG. 2, the pin 9 of the speaker mainly includes pin springs of four speakers, which are a first pin spring 10, a second pin spring 11, a third pin spring 12, and a fourth pin spring. 13, the above four pin shrapnel are respectively connected to the two wires of the sound film coil 3 and the two wires of the bottom plate coil 7 line.

In the speaker provided in this embodiment, the speaker sounding portion composed mainly of the speaker sound film 2, the sound film coil 3, the speaker insulating film 4, the bottom plate insulating layer 6, the bottom plate coil 7, and the speaker bottom plate 8 is improved. The sound emitting portion of the speaker can be excited by the electromagnetic field force of the sound film coil 3 and the bottom plate coil 7 by the in-phase magnetic poles, and the principle that the out-of-phase magnetic poles repel each other causes the speaker sound film to vibrate, thereby causing the speaker to emit sound. Since the speaker mainly vibrates the horn by the magnetic field force of the diaphragm coil 3 and the bottom plate coil 7, the speaker provided in this embodiment is a pure electric speaker.

In this embodiment, the speaker bracket 5 is mainly designed for the assembly and fixing of the vibration system of the speaker to ensure that the speaker can work normally.

In this embodiment, the speaker pin 9 has four pins, wherein the first pin spring 10 is connected to the Y1 end of the sound film coil 3, and the second pin spring 11 is connected to the Y2 end of the sound film coil 3; The shrapnel 12 is connected to the D+ end of the speaker backplane coil 7, and the fourth pin shrapnel 13 is connected to the D-end of the speaker backplane coil 7. The wiring method of the speaker pin refers to the speaker wiring diagram of FIG. 2 and the four-phase pure electric speaker of FIG. Principle equivalent diagram, because the speaker has a total of four terminals Y1, Y2, D+ and D- (Y1 end, Y2 end, D+ end, D-end of the speaker pin refer to Figure 4 four-phase pure electric speaker Schematic diagram of the principle equivalent diagram and coil wiring point, 15 represents Y1 end, 16 represents Y2 end, 17 represents D+ end, and 18 represents D-end). Therefore, the speaker is called a four-phase speaker.

In the embodiment of the present invention, the pure electric vibration of the speaker is realized by the four-phase pin, which mainly solves the magnetization problem of the permanent magnet to the iron powder in the high-concentration iron powder environment and the permanent magnet to the end product or the like. Including the influence of the wireless signal part of the wireless signal product, the product can also solve the problem of the thickness of the speaker, and the pure electric drive can make the speaker itself thinner. The working principle of the speaker is shown in Figure 3. The equivalent diagram of the four-phase pure electric speaker principle and the schematic diagram of the coil wiring point. The working principle of the speaker is as follows:

The speaker circuit loads electrical signals on the sound film coil 3 and the bottom plate coil 7 through the four speaker pins 9, respectively. The sound film coil 3 has a current flowing in and out, but since the coil is a loop coil, an electromagnetic field is formed. At the same time, for the bottom plate coil 7, like the sound film coil 3, the same current flows in and out, and the bottom plate coil 7 and the sound film coil 3 are also the same as the loop coil, so that a current loop is also formed, so that the bottom plate is also Produce an electromagnetic field, so the bottom plate coil 7 can Equivalent to a permanent magnet, which is the magnetic steel part of the ordinary speaker;

As shown in Fig. 3, the principle diagram of the four-phase pure electric speaker and the schematic diagram of the coil wiring point, the bottom plate coil 7 is loaded with a fixed current, and the fixed bottom current coil 7 is equivalent to the permanent magnet portion of the conventional speaker, assuming loading After the current, the bottom plate coil forms a magnetic field similar to the permanent magnet. The magnetic field formed by the bottom plate coil 7 is close to the N-pole of the magnetic field of the bottom plate coil, and the portion away from the sound film coil 3 near the bottom plate of the speaker is the magnetic field of the bottom plate. The S-pole; the sound film coil 3 adds a converted digital pulse electrical signal whose digital pulse signal is formed by a pulse current, so that the sound film coil 3 forms an electromagnetic field in which the N/S alternates, and the sound film coil 3 is also subjected to An alternating force of the alternating force (the alternating force of the alternating force is the attraction and repulsive force of the magnetic field force formed by the sound film coil 3 and the bottom plate coil 7 on the sound film), and the pulse current of the sound film coil 3 is increased by referring to the sound film coil of FIG. Schematic diagram of current and sound film movement direction changes. When the current of the sound film coil 3 is increased as shown in the right diagram of the principle of the four-phase pure electric speaker, the coil current flows from the left side to the right side. According to the right hand rule, the N pole of the sound film coil 3 can be judged. The direction of the bottom plate coil 7 is as shown in Fig. 3, the equivalent diagram of the four-phase pure electric speaker principle and the coil wiring point diagram. The right side of the bottom plate coil 7 is shown as the right side of the bottom plate coil 7 according to the electromagnetic field principle. Suction", and since the bottom plate coil 7 is fixed on the speaker bottom plate 8, the magnetic force of the sound film is the opposite direction of the sound film to the bottom plate, and the electromagnetic field force received by the bottom plate is shown in the right diagram of the sound film of Fig. 4. The direction of the resultant force is shown, so the diaphragm moves up. When the current increased by the sound film coil 3 flows from the right side to the left side, according to the right hand rule, it can be judged that the S pole of the sound film coil 3 is in the direction close to the bottom plate coil 7, as shown in the principle of the four-phase pure electric speaker of FIG. The figure and the coil connection point diagram show the N pole of the bottom plate coil 7 shown in the right figure, according to the principle of electromagnetic field, "the same polarity repels the opposite pole attracting", and since the bottom plate coil 7 is fixed on the speaker bottom plate 8, the sound film is subjected to The combined force of the magnetic field force is the direction of the sound film to the bottom plate, and the force of the electromagnetic field force received by the magnetic field is shown in the direction of the resultant force shown in the left diagram of the sound force diagram of the sound film of Fig. 4, so the sound film moves downward.

Since the bottom plate coil 7 is fixed on the speaker bottom plate 8, and the speaker bottom plate 8 is fixed on the speaker stand 5, the speaker bottom plate coil 7 is fixed, so when the speaker sound film coil 3 is loaded with the pulse film current and sound film movement of FIG. Directional change diagram When the pulse current shown in the left figure is shown, the moving direction of the sound film is as shown in the diagram of the sound pulse coil current and the direction of motion of the sound film. The periodic motion shown in the right figure makes the speaker emit sound. 1 indicates that the speaker diaphragm is magnetically affected Repulsive force, the speaker sound film vibrates upwards, that is, the speaker sound film moves from the bottom plate to the sound film; -1 indicates that the speaker sound film is attracted by the magnetic field, and the speaker sound film vibrates downward, that is, the speaker sound film is directed from the sound film to the bottom plate. motion.

It should be noted that since the vibration principle part of the speaker is formed by two toroidal coils, when the amplitude of the vibration of the speaker is increased, the current of the bottom plate coil 7 and the sound film coil 3 is simultaneously increased, so that the two magnetic force forces simultaneously increase. The amplitude can be increased, so that when the sound size (speaker loudness) is increased by one unit value, the power of the speaker needs to be increased by 0.5 unit value compared with the conventional speaker of the related art, so that the speaker can be protected. The speaker will burn out due to increased power.

The wiring method of the four-phase pure electric speaker of the present embodiment will be described in detail below:

As shown in FIGS. 2 to 3 and FIGS. 10 to 12, the four-phase speaker sound film coil 3 and the bottom plate coil 7 have four wires, and are respectively connected to the four pins of the speaker, wherein the first pin spring 10 The Y1 end of the sound film coil 3, the second pin spring 11 is connected to the Y2 end of the sound film coil 3; the third pin spring 12 is connected to the D+ end of the speaker bottom plate coil 7, and the fourth pin spring 13 is the speaker bottom plate coil 7. D-end (Y1 end, Y2 end, D+ end, D-end of the speaker pin refer to Figure 3 for the equivalent diagram of the four-phase pure electric speaker and the schematic diagram of the coil wiring point. Figure 15 represents the Y1 end and 16 represents the Y2 end. , 17 represents D+ end, 18 represents D-end), the actual wiring method refers to the schematic diagram of the speaker wiring method of FIG. 2 and the equivalent diagram of the principle of the four-phase pure electric speaker of FIG.

In a further alternative embodiment of the invention, the loudspeaker sound film coil 3 or the bottom plate coil 7 are wound with an enamel wire of insulating properties, and then the sound film coil 3 is fixed by dispensing or ultrasonic welding or other bonding method. On the speaker diaphragm 2, the bottom plate coil 7 is fixed to the speaker base plate 8 by dispensing or ultrasonic welding or other bonding. Thus, the enamel-wound damper film coil having the insulating property can eliminate the speaker insulating film 4 and the bottom plate insulating layer 6.

In still another alternative embodiment of the present invention, only one of the speaker insulating film 4 and the bottom insulating layer 6 is provided, that is, any one of the speaker insulating film 4 and the bottom insulating layer 6 is used as the insulating layer. To avoid the internal noise of the speaker diaphragm caused by vibration.

In still another alternative embodiment of the present invention, the sound film coil 3 and the bottom plate coil 7 are simultaneously replaced by a copper foil, and of course, one of the sound film coil 3 or the bottom plate coil 7 may be replaced by a copper foil. One is replaced by copper wire, insulated enameled wire or other conductive material.

In still another alternative embodiment of the present invention, the bottom plate coil 7 is made of an insulating enamel wire, and the steel plate is used for the bottom plate 9, and some fixing measures are taken on the steel plate to fix the bottom plate coil, such as directly on the steel sheet. Square hole, while opening the square hole, let one side of the square hole not be separated from the bottom plate, but the square hole, which is bent inwardly to fix the bottom plate coil 7, or directly through the dispensing or ultrasonic welding 7 fixed on the steel sheet of the bottom plate.

The effect diagram of the speaker shown in FIG. 13 shows an effect diagram of various angles of view of the speaker, which includes the effects of the front effect diagram 19, the back side effect diagram 20, the long side effect diagram 21, and the short side effect diagram 22 in four directions.

The embodiment of the present invention further provides an electronic device. As shown in FIG. 14 , the electronic device 100 is provided with the speaker 200 described in the foregoing, and the electronic device 100 may be a terminal product or a smart home product, for example, moving. Terminals, wearable devices, etc. Since the speaker 200 of the electronic device 100 is driven by pure electric power, the magnetic field is not generated when the speaker 200 is not working, so that the influence on the wireless signal of the electronic device 100 when the speaker 200 is not working can be reduced, and also The problem of magnetization of the iron powder in the high-concentration iron powder environment of the speaker 200 can be solved, and the risk of short-circuiting of the speaker 200 in the high-concentration iron powder environment is reduced or avoided.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

First, the speaker of the invention adopts pure electric driving, does not cause any interference to the wireless signal during non-operation of the speaker, and can make the wireless receiving effect of the speaker product better, and has relevant indicators for the antenna and the radio frequency. Better improvement.

Secondly, the speaker is driven by a four-phase pure electric type, and by increasing the current of the upper and lower speaker coils by one unit during operation, the amplitude of the speaker sound film can be increased by 2 units, thereby increasing the power of the speaker. Increase the loudness of the speaker in smaller cases. It is also possible to avoid burning the speaker coil due to the increased power of the ordinary speaker, and also to reduce the risk of aging of the power of the ordinary speaker.

Thirdly, the speaker bottom plate of the speaker design is made of insulating material, and the steel piece bottom steel plate design of the ordinary speaker is subtracted, so that the risk of the speaker being burned out due to the contact between the bottom magnetic steel and the PCB board of the ordinary speaker can be solved. .

Fourth, the design of the speaker can be replaced by a copper foil for the sound film coil 3 and the bottom plate coil 7, so that the thickness of the speaker can be made thinner, thereby creating a good realization condition for the ultra-thin machine.

The above description is only an alternative embodiment of the present invention, and is not intended to limit the present application, and various changes and modifications may be made by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application are intended to be included within the scope of the present application.

Industrial applicability

Claims

A speaker comprising: a housing, a sound film (2) disposed in the housing, and a first coil (3) and a second coil (7) disposed in the housing to drive the sound film (2) to vibrate ).
The speaker according to claim 1, wherein the housing comprises a top cover (1), a bracket (5), and a bottom plate (8), wherein the top cover (1) places the sound film (2) And the first coil (3) is fixed to an upper portion of the bracket (5), and the second coil (7) and the bottom plate (8) are sequentially fixed to a lower portion of the bracket (5) to be in the shell A sound cavity is formed in the body.
The speaker according to claim 1, further comprising: a first insulating layer (4) between the first coil (3) and the bracket (5).
A loudspeaker according to claim 2 or 3, further comprising a second insulating layer (6) between the second coil (7) and the bracket (5).
The speaker according to claim 4, wherein the first insulating layer (4) and/or the second insulating film layer (6) is an organic or inorganic insulating film.
The speaker according to claim 2, further comprising: a wiring pin (9), the wiring pin (9) being disposed on the bottom plate (8).
The speaker according to claim 6, wherein said wiring pin (9) includes four pin springs (10, 11, 12, 13) respectively disposed at four corners of said bottom plate (8) The two pin springs (10, 11) are respectively connected to the two terminals (15, 16) of the first coil (3), and the two pin springs (12, 13) are respectively Connected to the two terminals (17, 18) of the second coil (7).
The loudspeaker according to claim 1, wherein the first coil (3) and/or the second coil (7) are wound by an insulating enameled wire or a copper wire or a copper foil.
The speaker according to claim 2, wherein said bottom plate (8) is provided with a plurality of sound holes (14).
The speaker according to claim 2, wherein the bottom plate (8) is made of an insulating material.
A loudspeaker according to claim 2, wherein said sound film (2) is fixed to said first coil (3) by dispensing or ultrasonic welding, and/or said second coil (7) passes through a point Glue or Ultrasonic welding is fixed to the bottom plate (8).
The speaker according to claim 11, wherein, in an operating state, the first electromagnetic field generated by said first coil (3) and said second electromagnetic field generated by said second coil (7) are attracted and repelled by The sound film (2) is driven to vibrate.
The speaker according to claim 12, wherein said first electromagnetic field is an N/S alternating electromagnetic field generated by a pulse current in said first coil (3), said second electromagnetic field being said The N/S constant electromagnetic field generated by the fixed current in the second coil (7).
The speaker according to claim 8, wherein said second coil (7) is wound by an insulating enamel, said bottom plate (8) being a steel sheet, said bottom plate (8) having an opening therein, said opening A portion of the steel sheet is attached to the bottom plate and bent inwardly to secure the second coil (7).
An electronic device comprising the speaker of any of claims 1-14.
The electronic device of claim 15, the electronic device being a mobile terminal or a wearable device.