CN106375918A - Magnetic circuit system, loudspeaker and mobile terminal - Google Patents

Magnetic circuit system, loudspeaker and mobile terminal Download PDF

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Publication number
CN106375918A
CN106375918A CN201610985166.2A CN201610985166A CN106375918A CN 106375918 A CN106375918 A CN 106375918A CN 201610985166 A CN201610985166 A CN 201610985166A CN 106375918 A CN106375918 A CN 106375918A
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CN
China
Prior art keywords
magnetic circuit
cutting
voice coil
washer
wall body
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Granted
Application number
CN201610985166.2A
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Chinese (zh)
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CN106375918B (en
Inventor
阮清波
王志远
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Priority to CN201610985166.2A priority Critical patent/CN106375918B/en
Publication of CN106375918A publication Critical patent/CN106375918A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Abstract

An embodiment of the invention provides a magnetic circuit system, a loudspeaker and a mobile terminal. The magnetic circuit system comprises a magnetic steel part, a magnet stone and a washer, wherein the magnetic steel part is provided with a pedestal and a wall body positioned above the pedestal, the magnet stone is positioned at an area which is placed above the pedestal and surrounded by the wall body, the washer is positioned at an area which is placed above the magnet stone and surrounded by the wall body, an inner side of the wall body is provided with at least one first tip structure that faces toward the washer and/or an outer side of the washer is provided with at least one second tip structure which faces toward the magnetic steel part. Magnetic field guiding effects can be fulfilled, and a magnetic field passes through a magnetic conductive medium; strong physical effects can be exerted at a sharp part, and magnetic field intensity can be increased.

Description

A kind of magnetic circuit system, speaker and mobile terminal
Technical field
The present invention relates to communication technical field, more particularly, to a kind of magnetic circuit system, a kind of speaker and a kind of mobile terminal.
Background technology
With the development of mobile communication technology, mobile terminal has become as an indispensable part in people's life, real Show accessible call whenever and wherever possible, and, the function of much commonly using that mobile terminal is comprised, given people life and bring just Profit.
In the terminal, in order to carry out conversing, play the operation such as song, substantially speaker can be installed, will electric energy turn It is changed to the energy transducer of sound.
In coil-moving speaker, especially in miniature coil-moving speaker, the important feature group that magnetic circuit system is Become part, using the teaching of the invention it is possible to provide magnetic energy utilized by voice coil loudspeaker voice coil, produce sound.
When voice coil loudspeaker voice coil leaves magnetic circuit system, the intensity decreases in magnetic field, the stress of voice coil loudspeaker voice coil also decreases, and easily causes and compares Significantly non-linear distortion, lead to the sound sending produce muddy, scared, send out husky, send out broken, send out fried or the problems such as harden, sound Qualitative change is poor.
If strengthening the effect for voice coil loudspeaker voice coil for the magnetic field by increasing magnetic energy or reduction magnetic circuit gap, limited by material System, easy leakage field, not only causes magnetic energy to waste, and affects the normal operation of the electronic device of surrounding.
Content of the invention
The embodiment of the present invention provides a kind of magnetic circuit system, with solve how on the premise of avoiding leakage field, improve non-linear The problem of distortion.
A kind of first aspect, there is provided magnetic circuit system, described magnetic circuit system includes magnet steel, Magnetitum and washer；
Described magnet steel has base and is located at the wall body above described base；
Among the region that described Magnetitum is located on described base, described wall body surrounds；
Among the region that described washer is located on described Magnetitum, described wall body surrounds；
It is provided with least one first cutting-edge structure towards described washer inside described wall body；
And/or,
It is provided with least one second cutting-edge structure towards described magnet steel outside described washer.
A kind of first aspect, there is provided speaker, described speaker includes vibrational system and magnetic circuit system；
Described vibrational system includes vibrating diaphragm and voice coil loudspeaker voice coil；
Described magnetic circuit system includes magnet steel, Magnetitum and washer；
Described magnet steel has base and is located at the wall body above described base；
Among the region that described Magnetitum is located on described base, described wall body surrounds；
Among the region that described washer is located on described Magnetitum, described wall body surrounds；
It is provided with least one first cutting-edge structure towards described washer inside described wall body, and/or, in described China It is provided with least one second cutting-edge structure towards described magnet steel outside department；
Described vibrating diaphragm is located on described magnet steel and described washer, and described voice coil loudspeaker voice coil is suspended under described vibrating diaphragm；
The both sides of described voice coil loudspeaker voice coil are described first cutting-edge structure and/or described second cutting-edge structure.
A kind of third aspect, there is provided mobile terminal, described mobile terminal includes above-mentioned speaker.
So, in the embodiment of the present invention, using the most advanced and sophisticated clustering phenomena of magnetic, it is provided with least one direction inside wall body First cutting-edge structure of washer, and/or, it is provided with least one second cutting-edge structure towards described magnet steel outside washer, Thus reaching the effect in guiding magnetic field, magnetic field is passed through in magnetic conductive media, and for sharp position, the physical effect causing can be more By force, that is, magnetic field intensity can strengthen.
After voice coil position leaves magnetic circuit gap, magnetic field intensity reduces slowly, and the length that voice coil loudspeaker voice coil is in magnetic field diminishes, In the case that the current value in voice coil loudspeaker voice coil is constant, the Ampere force suffered by voice coil loudspeaker voice coil slowly reduces, so that voice coil loudspeaker voice coil stress is whole Become in magnetic field to equalize, and the broadening of magnetic energy, so that the effect of Ampere force suffered by voice coil loudspeaker voice coil is bigger, allows voice coil loudspeaker voice coil leaving Magnetic circuit gap farther out when it is also possible to there be preferable power, improve loudspeaker sensitivity, slow down non-linear distortion.
And, big transformation is not carried out to magnetic circuit system, not to increasing magnetic energy or reducing magnetic circuit gap, to add High-intensity magnetic field for the effect of voice coil loudspeaker voice coil, therefore, it is to avoid leakage field, thus avoid magnetic energy waste and impact around electronic device Normal operation.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by institute in the description to the embodiment of the present invention Need use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only the present invention some enforcement Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings Obtain other accompanying drawings.
Fig. 1 is a kind of profile of the magnetic circuit system of exemplary embodiment of the present invention；
Fig. 2 is a kind of partial enlarged drawing of the magnetic circuit system of exemplary embodiment of the present invention；
Fig. 3 is the partial enlarged drawing of the magnetic circuit system of another kind of exemplary embodiment of the present invention；
Fig. 4 is the partial enlarged drawing of the magnetic circuit system of another kind of exemplary embodiment of the present invention；
Fig. 5 is a kind of exemplary plot of the magnetic circuit simulation of traditional magnetic circuit system；
Fig. 6 is a kind of exemplary plot of the magnetic field intensity of magnetic circuit simulation of traditional magnetic circuit system；
Fig. 7 is a kind of exemplary plot of the magnetic circuit simulation of the magnetic circuit system of exemplary embodiment of the present invention；
Fig. 8 is a kind of exemplary plot of the magnetic field intensity of the magnetic circuit simulation of the magnetic circuit system of exemplary embodiment of the present invention；
Fig. 9 is a kind of profile of the speaker of exemplary embodiment of the present invention；
Figure 10 is the profile of the magnetic circuit system of another kind of exemplary embodiment of the present invention；
Figure 11 is the partial enlarged drawing of the magnetic circuit system of another kind of exemplary embodiment of the present invention；
Figure 12 is the partial enlarged drawing of the magnetic circuit system of another kind of exemplary embodiment of the present invention；
Figure 13 is the partial enlarged drawing of the magnetic circuit system of another kind of exemplary embodiment of the present invention；
Figure 14 is the exemplary plot of the magnetic circuit simulation of the magnetic circuit system of another kind of exemplary embodiment of the present invention；
Figure 15 is the example of the magnetic field intensity of the magnetic circuit simulation of the magnetic circuit system of another kind of exemplary embodiment of the present invention Figure；
Figure 16 is a kind of profile of the speaker of exemplary embodiment of the present invention；
Figure 17 is the profile of the magnetic circuit system of another kind of exemplary embodiment of the present invention；
Figure 18 is the partial enlarged drawing of the magnetic circuit system of another kind of exemplary embodiment of the present invention；
Figure 19 is the partial enlarged drawing of the magnetic circuit system of another kind of exemplary embodiment of the present invention；
Figure 20 is a kind of exemplary plot of the magnetic circuit simulation of the magnetic circuit system of exemplary embodiment of the present invention；
Figure 21 is a kind of exemplary plot of the magnetic field intensity of the magnetic circuit simulation of the magnetic circuit system of exemplary embodiment of the present invention；
Figure 22 is a kind of profile of the speaker of exemplary embodiment of the present invention；
Figure 23 is the structural representation of the mobile terminal of one embodiment of the invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation description is it is clear that described embodiment a part of embodiment that is the present invention, rather than whole embodiments.Based on this Embodiment in bright, the every other enforcement that those of ordinary skill in the art are obtained under the premise of not making creative work Example, broadly falls into the scope of protection of the invention.
Embodiment one
With reference to Fig. 1, show a kind of profile of the magnetic circuit system of exemplary embodiment of the present invention.
As shown in figure 1, this magnetic circuit system 100 be internal magnetization structure, small volume little compared with external magnetic type structure leakage field it is adaptable to The speaker of miniaturization, to apply in the parts such as the receiver of mobile terminal (as mobile phone, panel computer etc.), earphone.
This magnetic circuit system 100 can include magnet steel 110 (yoke), Magnetitum 120 (maghet) and washer 130 (washer/ plate).
Magnet steel 110 is u ferrum (u-yoke), and material mostly is spcc (general cold rolling carbon steel sheet and steel band), spcd (punching Pressure is with cold rolling carbon steel sheet and steel band), spce (deep-draw cold rolling carbon steel plate and steel band) etc., mainly made by punching press.
Magnet steel 110 has base 111 and is located at the wall body 112 of base 111 top it is generally the case that base 111 is for justifying Shape, wall body 112 are toroidal, and both coincide so that magnet steel 110 is cylindrical in shape, its profile is in " u " shape.
The material of Magnetitum 120 is magnetic material, such as aluminum nickel cobalt and terres rares (as neodymium ferro-boron) etc., for producing magnetic energy, shape Shape is mostly circular, oval, also has assembling to need and particular design becomes special-shaped, such as square, triangle etc., positioned at base 111 On, among the region that surrounds of wall body 112, Magnetitum 120 is general and base 111 directly contact, and leaves sky and wall body 112 between Gap, and non-direct contact.
Washer 130 also known as upper plate, upper piece, be typically stamped to form by hot rolled steel plate (phosphorus content), shape be mostly circular, Ellipse, also has assembling to need and particular design becomes special-shaped, such as square, triangle etc., and on Magnetitum 120, wall body 112 wraps Among the region enclosed, washer 130 is general and Magnetitum 120 directly contact, and leaves space and wall body 112 between, and non-immediate connects Touch.
In embodiments of the present invention, it is provided with least one first cutting-edge structure towards washer 130 inside wall body 112 113, that is, the first cutting-edge structure 113 is the end of wall body 112, and volume is little compared with wall body 112.
As shown in Fig. 2 forming magnetic circuit gap 140 between washer 130 and wall body 112, also known as magnetic gap (gap), first is most advanced and sophisticated The topside area of structure 113 is less than surface area in magnetic circuit gap 140 for the wall body 112, the topside area of the first cutting-edge structure 113 Less than surface area in magnetic circuit gap 140 for the washer 130.
In order to ensure the turn-on effect in magnetic field, at least part of structure of the first cutting-edge structure 113 is located at magnetic circuit gap 140 In, that is, the first cutting-edge structure 113 can have part-structure to be located at outside magnetic circuit gap 140.
When the first cutting-edge structure 113 quantity be two or more when, between multiple first cutting-edge structures 113 away from It is more than or equal to magnetic circuit from (i.e. the distance between first the first cutting-edge structure 113 and last the first cutting-edge structure 113) The width in gap 140, such as the distance between first cutting-edge structure 113 are 1-1.5 times of the width in magnetic circuit gap 140.
As shown in figure 3, for the turn-on effect improving magnetic field, the marginal texture 131 of washer 130 can exceed Magnetitum 120 Outer ledge.
As shown in figure 4, for the turn-on effect improving magnetic field, wall body 112 has projective structure in magnetic circuit gap 140 1121, projective structure 1121 exceeds the inside edge of wall body 112.
Meanwhile, produce for convenience, in one example, the first cutting-edge structure 113 can be set by way of fluting, Specifically, the first groove 1122 can be set in projective structure 1121, formed with the structure in the first groove 1122 both sides First cutting-edge structure 113.
In implementing, after Magnetitum 120 magnetizes, form magnetic field, produce magnetic force, there is n (northern) at the two ends of Magnetitum 120 Pole, s (southern) pole, inside Magnetitum 120, flux is from s pole to n pole, and outside is from n pole to s pole, and magnet steel 110 is made with washer 120 For the effect of magnetic conduction, that is, magnet steel 110 is by turning on magnetic field between the first cutting-edge structure 113 and washer 120.
For making those skilled in the art more fully understand the embodiment of the present invention, to illustrate below by way of specific magnetic circuit simulation The magnetic circuit system of the embodiment of the present invention.
First, magnetic circuit simulation is carried out to traditional magnetic circuit system, its Distribution of Magnetic Field is as shown in Figure 5.
Wherein, the magnetic field intensity of a route (i.e. line segment in magnetic circuit gap shown in Fig. 5) in magnetic circuit gap as shown in Figure 5 As shown in fig. 6, its transverse axis be Fig. 5 in this route position (i.e. one end of the line segment in magnetic circuit gap shown in Fig. 5 be position 0, separately One end be position 4), the longitudinal axis be magnetic field intensity.
As shown in figure 5, in the middle part of this route magnetic field intensity value highest, effective magnetic energy integrated distribution in magnetic circuit gap, If beyond the scope in magnetic circuit gap, magnetic field intensity reduces rapidly.
Voice coil loudspeaker voice coil this line-of-road movement typically in magnetic circuit gap as shown in Figure 5, its stress can pass through equation below meter Calculate:
F=bil
Wherein, f be Ampere force, b be magnetic field intensity, i be current value in voice coil loudspeaker voice coil, l is in the length in magnetic field for voice coil loudspeaker voice coil.
After voice coil position leaves magnetic circuit gap, magnetic field intensity starts to reduce rapidly, and voice coil loudspeaker voice coil is in the length in magnetic field Also diminish, in the case that the current value in voice coil loudspeaker voice coil is constant, the Ampere force suffered by voice coil loudspeaker voice coil can strongly reduce, and voice coil loudspeaker voice coil is leaving magnetic circuit Gap farther out when, power is poor, now due to vibrational system and damping act on increase, easily cause obvious non-thread Property distortion.
2nd, apply the embodiment of the present invention, magnetic circuit simulation is carried out to traditional magnetic circuit system, its Distribution of Magnetic Field is as shown in Figure 7.
Wherein, the magnetic field intensity of a route (i.e. line segment in magnetic circuit gap shown in Fig. 7) in magnetic circuit gap as shown in Figure 7 As shown in figure 8, its transverse axis be Fig. 8 in this route position (i.e. one end of the line segment in magnetic circuit gap shown in Fig. 8 be position 0, separately One end be position 4), the longitudinal axis be magnetic field intensity.
As shown in figure 8, the value of magnetic field intensity decreases in the middle part of this route, but, the distribution in magnetic field is except being distributed in magnetic In the gap of road, if beyond the scope in magnetic circuit gap, magnetic field intensity slows down, and has widened the distribution of Effective magnetic energy.
Voice coil loudspeaker voice coil this line-of-road movement typically in magnetic circuit gap as shown in Figure 7, its stress can pass through equation below meter Calculate:
F=bil
Wherein, f be Ampere force, b be magnetic field intensity, i be current intensity in voice coil loudspeaker voice coil, l is in the length in magnetic field for voice coil loudspeaker voice coil Degree.
So, in the embodiment of the present invention, using the most advanced and sophisticated clustering phenomena of magnetic, it is provided with least one direction inside wall body First cutting-edge structure of washer, thus reaching the effect in guiding magnetic field, magnetic field is passed through in magnetic conductive media, for sharp portion Position, the physical effect causing can be higher, and that is, magnetic field intensity can strengthen.
After voice coil position leaves magnetic circuit gap, magnetic field intensity reduces slowly, and the length that voice coil loudspeaker voice coil is in magnetic field diminishes, In the case that the current value in voice coil loudspeaker voice coil is constant, the Ampere force suffered by voice coil loudspeaker voice coil slowly reduces, so that voice coil loudspeaker voice coil stress is whole Become in magnetic field to equalize, and the broadening of magnetic energy, so that the effect of Ampere force suffered by voice coil loudspeaker voice coil is bigger, allows voice coil loudspeaker voice coil leaving Magnetic circuit gap farther out when it is also possible to there be preferable power, improve loudspeaker sensitivity, slow down non-linear distortion.
And, big transformation is not carried out to magnetic circuit system, not to increasing magnetic energy or reducing magnetic circuit gap, to add High-intensity magnetic field for the effect of voice coil loudspeaker voice coil, therefore, it is to avoid leakage field, thus avoid magnetic energy waste and impact around electronic device Normal operation.
Embodiment two
With reference to Fig. 9, show a kind of profile of the speaker of exemplary embodiment of the present invention.
As shown in figure 9, speaker 900 includes the structures such as vibrational system, magnetic circuit system and support system.
Wherein, support system includes the structures such as frame, packing ring, dust cap, terminal board, lead.
Frame, is so that each several part (vibrational system, magnetic circuit system and support system etc.) is combined together, plays overall attachment With the effect connecting.
Dust cap, is mainly used in preventing dust and other debris from entering magnetic circuit system and attractive in appearance being used for.To tonequality table Now part master control high frequency show, sound material soft or hard/radian size and different, material has mylar (mylar), silk, aluminum etc..
Packing ring, is mainly used in allowing vibrating diaphragm and frame preferably to bind, and the control of loudspeaker edge height.
Terminal board, mainly plays welding external lead wire, is the connection member of external connection and voice coil loudspeaker voice coil.
Lead, acts primarily as the effect that silver-colored spring is connected with terminal board.
Vibrational system includes vibrating diaphragm 950, voice coil loudspeaker voice coil 940 and plays the structures such as ripple.
Vibrating diaphragm, including aluminium film, ceramic membrane, silkworm silk film, titanium film, beryllium film etc., by the speed promoting vibrating diaphragm, to produce height Low frequency.
Voice coil loudspeaker voice coil is wound around according to circular manner by metallic coil, can be with conducting electric current.
Play ripple also known as antivibrator, centring disk, mainly have braking action and center holding effect.It can make voice coil loudspeaker voice coil in magnetic In gap during motion, will not magnetic to magnet steel or Magnet.
Certainly, the structure of above-mentioned speaker is intended only as example, when implementing the embodiment of the present invention, can be according to actual feelings Condition arranges the structure of other speakers, and the embodiment of the present invention is not any limitation as to this.In addition, the structure except above-mentioned speaker Outward, those skilled in the art can also adopt the structure of other speakers according to actual needs, and the embodiment of the present invention is to this not yet It is any limitation as.
Magnetic circuit system includes the structures such as magnet steel 910, Magnetitum 920 and washer 930.
Wherein, the wall body 912 that magnet steel 910 has base 911 and is located at base 911 top.
Magnetitum 920 is located on base 911, among wall body 912 area encompassed.
Washer 930 is located on Magnetitum 920, among wall body 912 area encompassed.
In embodiments of the present invention, it is provided with least one first cutting-edge structure towards washer 930 inside wall body 912 913.
Vibrating diaphragm 950 is located on magnet steel 910 and washer 930, and voice coil loudspeaker voice coil 940 is suspended under vibrating diaphragm 950.
Voice coil loudspeaker voice coil 950 side is the first cutting-edge structure 913 of magnet steel 910, and opposite side is washer 930.
In one embodiment of the invention, magnetic circuit gap, the first cutting-edge structure are formed between washer 930 and wall body 912 913 topside area is less than surface area in magnetic circuit gap for the wall body 912, and the topside area of the first cutting-edge structure 913 is less than China Department's 930 surface areas in magnetic circuit gap.
In one embodiment of the invention, magnetic circuit gap, the first cutting-edge structure are formed between washer 930 and wall body 912 913 at least part of structure is located in magnetic circuit gap.
In one embodiment of the invention, when the quantity of the first cutting-edge structure 913 is two or more, multiple The distance between first cutting-edge structure 913 is more than or equal to the width in magnetic circuit gap.
In one embodiment of the invention, the marginal texture of washer 930 exceeds the outer ledge of Magnetitum 920.
In an example of the embodiment of the present invention, wall body 912 has projective structure in magnetic circuit gap, and projective structure surpasses Go out the inside edge of wall body 912；
First groove is set in projective structure, the first cutting-edge structure 913 is formed with the structure in the first groove both sides.
After Magnetitum 920 magnetizes, form magnetic field, magnet steel 910 passes through to turn between the first cutting-edge structure 913 and washer 930 Magnetic field.
Voice coil loudspeaker voice coil 940 is drawn two leads and is soldered to terminal board, and terminal board is connected with external electric signal, and the electric current of change enters Voice coil loudspeaker voice coil 940.
When electric current enters voice coil loudspeaker voice coil 940, in the magnetic field that voice coil loudspeaker voice coil 940 turns between the first cutting-edge structure 913 and washer 930 Stress, promotes vibrating diaphragm 950 to move back and forth, and compressed air produces sound.
In embodiments of the present invention, due to the application basic simlarity of magnetic circuit system and embodiment one, so the comparison of description Simply, in place of correlation, the part referring to embodiment one illustrates, embodiment of the present invention here is not described in detail.
So, in the embodiment of the present invention, using the most advanced and sophisticated clustering phenomena of magnetic, it is provided with least one direction inside wall body First cutting-edge structure of washer, thus reaching the effect in guiding magnetic field, magnetic field is passed through in magnetic conductive media, for sharp portion Position, the physical effect causing can be higher, and that is, magnetic field intensity can strengthen.
After voice coil position leaves magnetic circuit gap, magnetic field intensity reduces slowly, and the length that voice coil loudspeaker voice coil is in magnetic field diminishes, In the case that the current value in voice coil loudspeaker voice coil is constant, the Ampere force suffered by voice coil loudspeaker voice coil slowly reduces, so that voice coil loudspeaker voice coil stress is whole Become in magnetic field to equalize, and the broadening of magnetic energy, so that the effect of Ampere force suffered by voice coil loudspeaker voice coil is bigger, allows voice coil loudspeaker voice coil leaving Magnetic circuit gap farther out when it is also possible to there be preferable power, improve loudspeaker sensitivity, slow down non-linear distortion.
And, big transformation is not carried out to magnetic circuit system, not to increasing magnetic energy or reducing magnetic circuit gap, to add High-intensity magnetic field for the effect of voice coil loudspeaker voice coil, therefore, it is to avoid leakage field, thus avoid magnetic energy waste and impact around electronic device Normal operation.
Embodiment three
With reference to Figure 10, show the profile of the magnetic circuit system of another kind of exemplary embodiment of the present invention.
As shown in Figure 10, this magnetic circuit system 1000 is internal magnetization structure, and, small volume little compared with external magnetic type structure leakage field is suitable for In the speaker of miniaturization, to apply in parts such as the receiver of mobile terminal (as mobile phone, panel computer etc.), earphones In.
This magnetic circuit system 1000 can include magnet steel 1010 (yoke), Magnetitum 1020 (maghet) and washer 1030 (washer/plate).
Magnet steel 1010 is u ferrum (u-yoke), and material mostly is spcc (general cold rolling carbon steel sheet and steel band), spcd (punching press cold rolling carbon steel sheet and steel band), spce (deep-draw cold rolling carbon steel plate and steel band) etc., mainly pass through punching press system Make.
Magnet steel 1010 has base 1011 and the wall body 1012 that is located at base 1011 top it is generally the case that base 1011 It is toroidal for circular, wall body 1012, both coincide so that magnet steel 1010 is cylindrical in shape, its profile is in " u " shape.
The material of Magnetitum 1020 is magnetic material, such as aluminum nickel cobalt and terres rares (as neodymium ferro-boron) etc., for producing magnetic energy, shape Shape is mostly circular, oval, also has assembling to need and particular design becomes special-shaped, such as square, triangle etc., positioned at base 1011 On, among the region that surrounds of wall body 1012, Magnetitum 1020 is general and base 1011 directly contact, and stays and wall body 1012 between There is space, and non-direct contact.
Washer 1030 also known as upper plate, upper piece, be typically stamped to form by hot rolled steel plate (phosphorus content), shape be mostly circular, Ellipse, also has assembling to need and particular design becomes special-shaped, and such as square, triangle etc., on Magnetitum 1020, wall body 1012 Among the region surrounding, washer 1030 is general and Magnetitum 1020 directly contact, and leaves space and wall body 1012 between, and non-straight Contact.
In embodiments of the present invention, there is at least one second most advanced and sophisticated knot towards magnet steel 1010 in washer 1030 China and foreign countries' side Structure 1031, that is, the second cutting-edge structure 1031 is the end of washer 1030, and volume is little compared with washer 1030.
As shown in figure 11, magnetic circuit gap 1040, also known as magnetic gap (gap), second are formed between washer 1030 and wall body 1012 The topside area of cutting-edge structure 1031 is less than surface area in magnetic circuit gap 1040 for the washer 1030, the second cutting-edge structure 1031 Topside area is less than surface area in magnetic circuit gap 1040 for the wall body 1012.
In order to ensure the turn-on effect in magnetic field, at least part of structure of the second cutting-edge structure 1031 is located at magnetic circuit gap 1040, that is, the second cutting-edge structure 1031 part-structure can be had to be located at outside magnetic circuit gap 1040.
When the quantity of the second cutting-edge structure 1031 is two or more, between multiple second cutting-edge structures 1031 Distance the distance between (i.e. first the second cutting-edge structure 1031 with last the second cutting-edge structure 1031) is more than or equal to The width in magnetic circuit gap 1040, such as the distance between second cutting-edge structure 1031 are 1-1.5 times of the width in magnetic circuit gap 1040.
As shown in figure 12, in order to improve the turn-on effect in magnetic field, wall body 1012 has protrusion knot in magnetic circuit gap 1040 Structure 1013, projective structure 1013 exceeds the inside edge of wall body 1012.
As shown in figure 13, in order to improve the turn-on effect in magnetic field, the marginal texture 1032 of washer 1030 exceeds Magnetitum 1020 Outer ledge.
Meanwhile, produce for convenience, in one example, the second cutting-edge structure can be set by way of fluting 1031, specifically, the second groove 1033 can be provided with marginal texture 1032, with the knot in the second groove 1033 both sides It is configured to the second cutting-edge structure 1031.
In implementing, after Magnetitum 1720 magnetizes, form magnetic field, produce magnetic force, there is n (northern) at the two ends of Magnetitum 1720 Pole, s (southern) pole, inside Magnetitum 1720, flux is from s pole to n pole, and outside is from n pole to s pole, magnet steel 1710 and washer 1730 as magnetic conduction effect, that is, washer 1030 pass through between the second cutting-edge structure 1031 and magnet steel 1010 turn on magnetic field.
For making those skilled in the art more fully understand the embodiment of the present invention, to illustrate below by way of specific magnetic circuit simulation The magnetic circuit system of the embodiment of the present invention.
First, magnetic circuit simulation is carried out to traditional magnetic circuit system, its Distribution of Magnetic Field is as shown in Figure 5.
Wherein, the magnetic field intensity of a route (i.e. line segment in magnetic circuit gap shown in Fig. 5) in magnetic circuit gap as shown in Figure 5 As shown in fig. 6, its transverse axis be Fig. 5 in this route position (i.e. one end of the line segment in magnetic circuit gap shown in Fig. 5 be position 0, separately One end be position 4), the longitudinal axis be magnetic field intensity.
As shown in figure 5, in the middle part of this route magnetic field intensity value highest, effective magnetic energy integrated distribution in magnetic circuit gap, If beyond the scope in magnetic circuit gap, magnetic field intensity reduces rapidly.
Voice coil loudspeaker voice coil this line-of-road movement typically in magnetic circuit gap as shown in Figure 5, its stress can pass through equation below meter Calculate:
F=bil
Wherein, f be Ampere force, b be magnetic field intensity, i be current value in voice coil loudspeaker voice coil, l is in the length in magnetic field for voice coil loudspeaker voice coil.
After voice coil position leaves magnetic circuit gap, magnetic field intensity starts to reduce rapidly, and voice coil loudspeaker voice coil is in the length in magnetic field Also diminish, in the case that the current value in voice coil loudspeaker voice coil is constant, the Ampere force suffered by voice coil loudspeaker voice coil can strongly reduce, and voice coil loudspeaker voice coil is leaving magnetic circuit Gap farther out when, power is poor, now due to vibrational system and damping act on increase, easily cause obvious non-thread Property distortion.
The two application embodiment of the present invention, carry out magnetic circuit simulation to traditional magnetic circuit system, its Distribution of Magnetic Field is as shown in figure 14.
Wherein, in magnetic circuit gap as shown in figure 14, the magnetic field of a route (i.e. line segment in magnetic circuit gap shown in Figure 14) is strong As shown in figure 15, its transverse axis is that (i.e. one end of the line segment in magnetic circuit gap shown in Fig. 8 is position for the position of this route in Figure 15 to degree 0, the other end be position 4), the longitudinal axis be magnetic field intensity.
As shown in figure 15, in the middle part of this route, the value of magnetic field intensity decreases, but, the distribution in magnetic field is except being distributed in magnetic In the gap of road, if beyond the scope in magnetic circuit gap, magnetic field intensity slows down, and has widened the distribution of Effective magnetic energy.
Voice coil loudspeaker voice coil this line-of-road movement typically in magnetic circuit gap as shown in figure 14, its stress can pass through equation below meter Calculate:
F=bil
Wherein, f be Ampere force, b be magnetic field intensity, i be current intensity in voice coil loudspeaker voice coil, l is in the length in magnetic field for voice coil loudspeaker voice coil Degree.
So, in the embodiment of the present invention, using the most advanced and sophisticated clustering phenomena of magnetic, it is provided with least one direction outside washer Second cutting-edge structure of magnet steel, thus reaching the effect in guiding magnetic field, magnetic field is passed through in magnetic conductive media, for sharp portion Position, the physical effect causing can be higher, and that is, magnetic field intensity can strengthen.
After voice coil position leaves magnetic circuit gap, magnetic field intensity reduces slowly, and the length that voice coil loudspeaker voice coil is in magnetic field diminishes, In the case that the current value in voice coil loudspeaker voice coil is constant, the Ampere force suffered by voice coil loudspeaker voice coil slowly reduces, so that voice coil loudspeaker voice coil stress is whole Become in magnetic field to equalize, and the broadening of magnetic energy, so that the effect of Ampere force suffered by voice coil loudspeaker voice coil is bigger, allows voice coil loudspeaker voice coil leaving Magnetic circuit gap farther out when it is also possible to there be preferable power, improve loudspeaker sensitivity, slow down non-linear distortion.
And, big transformation is not carried out to magnetic circuit system, not to increasing magnetic energy or reducing magnetic circuit gap, to add High-intensity magnetic field for the effect of voice coil loudspeaker voice coil, therefore, it is to avoid leakage field, thus avoid magnetic energy waste and impact around electronic device Normal operation.
Example IV
With reference to Figure 16, show the profile of the speaker of another kind of exemplary embodiment of the present invention.
As shown in figure 16, speaker 1600 includes the structures such as vibrational system, magnetic circuit system and support system.
Wherein, support system includes the structures such as frame, packing ring, dust cap, terminal board, lead.
Frame, is so that each several part (vibrational system, magnetic circuit system and support system etc.) is combined together, plays overall attachment With the effect connecting.
Dust cap, is mainly used in preventing dust and other debris from entering magnetic circuit system and attractive in appearance being used for.To tonequality table Now part master control high frequency show, sound material soft or hard/radian size and different, material has mylar (mylar), silk, aluminum etc..
Packing ring, is mainly used in allowing vibrating diaphragm and frame preferably to bind, and the control of loudspeaker edge height.
Terminal board, mainly plays welding external lead wire, is the connection member of external connection and voice coil loudspeaker voice coil.
Lead, acts primarily as the effect that silver-colored spring is connected with terminal board.
Vibrational system includes vibrating diaphragm 1650, voice coil loudspeaker voice coil 1640 and plays the structures such as ripple.
Vibrating diaphragm, including aluminium film, ceramic membrane, silkworm silk film, titanium film, beryllium film etc., by the speed promoting vibrating diaphragm, to produce height Low frequency.
Voice coil loudspeaker voice coil is wound around according to circular manner by metallic coil, can be with conducting electric current.
Play ripple also known as antivibrator, centring disk, mainly have braking action and center holding effect.It can make voice coil loudspeaker voice coil in magnetic In gap during motion, will not magnetic to magnet steel or Magnet.
Certainly, the structure of above-mentioned speaker is intended only as example, when implementing the embodiment of the present invention, can be according to actual feelings Condition arranges the structure of other speakers, and the embodiment of the present invention is not any limitation as to this.In addition, the structure except above-mentioned speaker Outward, those skilled in the art can also adopt the structure of other speakers according to actual needs, and the embodiment of the present invention is to this not yet It is any limitation as.
Magnetic circuit system includes the structures such as magnet steel 1610, Magnetitum 1620 and washer 1630.
Wherein, the wall body 1612 that magnet steel 1610 has base 1611 and is located at base 1611 top.
Among the region that Magnetitum 1620 is located on base 1611, wall body 1612 surrounds.
Among the region that washer 1630 is located on Magnetitum 1620, wall body 1612 surrounds.
In embodiments of the present invention, it is provided with least one second most advanced and sophisticated knot towards magnet steel 1610 outside washer 1630 Structure 1631.
Vibrating diaphragm 1650 is located on magnet steel 1610 and washer 1630, and voice coil loudspeaker voice coil 1640 is suspended under vibrating diaphragm 1650.
Voice coil loudspeaker voice coil 1650 side is magnet steel 1610, and opposite side is the second cutting-edge structure 1631 of washer 1630.
In one embodiment of the invention, magnetic circuit gap, the second most advanced and sophisticated knot are formed between washer 1630 and wall body 1610 The topside area of structure 1631 is less than surface area in magnetic circuit gap for the washer 1630, and the topside area of the second cutting-edge structure 1631 is little In surface area in magnetic circuit gap for the wall body 1610.
In one embodiment of the invention, magnetic circuit gap, the second most advanced and sophisticated knot are formed between washer 1630 and wall body 1610 At least part of structure of structure 1631 is located in magnetic circuit gap.
In one embodiment of the invention, when the quantity of the second cutting-edge structure 1631 is two or more, many The distance between individual second cutting-edge structure 1631 is more than or equal to the width in magnetic circuit gap.
In one embodiment of the invention, wall body 1610 has projective structure in magnetic circuit gap, and projective structure exceeds The inside edge of described wall body.
In one embodiment of the invention, the marginal texture of washer 1630 exceeds the outer ledge of Magnetitum 1620.
It is provided with the second groove in marginal texture, the second cutting-edge structure 1631 is formed with the structure of the second groove both sides.
After Magnetitum 1620 magnetizes, form magnetic field, washer 1630 passes through between the second cutting-edge structure 1631 and magnet steel 1620 Conducting magnetic field.
Voice coil loudspeaker voice coil 1640 is drawn two leads and is soldered to terminal board, and terminal board is connected with external electric signal, and the electric current of change enters Enter voice coil loudspeaker voice coil 1640.
When electric current enters voice coil loudspeaker voice coil 1640, the magnetic that voice coil loudspeaker voice coil 1640 turns between the second cutting-edge structure 1631 and magnet steel 1620 Stress in, promotes vibrating diaphragm 1650 to move back and forth, produces sound.
In embodiments of the present invention, due to the application basic simlarity of magnetic circuit system and embodiment three, so the comparison of description Simply, in place of correlation, the part referring to embodiment three illustrates, embodiment of the present invention here is not described in detail.
So, in the embodiment of the present invention, using the most advanced and sophisticated clustering phenomena of magnetic, it is provided with least one direction outside washer Second cutting-edge structure of magnet steel, thus reaching the effect in guiding magnetic field, magnetic field is passed through in magnetic conductive media, for sharp portion Position, the physical effect causing can be higher, and that is, magnetic field intensity can strengthen.
After voice coil position leaves magnetic circuit gap, magnetic field intensity reduces slowly, and the length that voice coil loudspeaker voice coil is in magnetic field diminishes, In the case that the current value in voice coil loudspeaker voice coil is constant, the Ampere force suffered by voice coil loudspeaker voice coil slowly reduces, so that voice coil loudspeaker voice coil stress is whole Become in magnetic field to equalize, and the broadening of magnetic energy, so that the effect of Ampere force suffered by voice coil loudspeaker voice coil is bigger, allows voice coil loudspeaker voice coil leaving Magnetic circuit gap farther out when it is also possible to there be preferable power, improve loudspeaker sensitivity, slow down non-linear distortion.
And, big transformation is not carried out to magnetic circuit system, not to increasing magnetic energy or reducing magnetic circuit gap, to add High-intensity magnetic field for the effect of voice coil loudspeaker voice coil, therefore, it is to avoid leakage field, thus avoid magnetic energy waste and impact around electronic device Normal operation.
Embodiment five
With reference to Figure 17, show the profile of the magnetic circuit system of another kind of exemplary embodiment of the present invention.
As shown in figure 17, this magnetic circuit system 1700 is internal magnetization structure, and, small volume little compared with external magnetic type structure leakage field is suitable for In the speaker of miniaturization, to apply in parts such as the receiver of mobile terminal (as mobile phone, panel computer etc.), earphones In.
This magnetic circuit system 1700 can include magnet steel 1710 (yoke), Magnetitum 1720 (maghet) and washer 1730 (washer/plate).
Magnet steel 1710 is u ferrum (u-yoke), and material mostly is spcc (general cold rolling carbon steel sheet and steel band), spcd (punching press cold rolling carbon steel sheet and steel band), spce (deep-draw cold rolling carbon steel plate and steel band) etc., mainly pass through punching press system Make.
Magnet steel 1710 has base 1711 and the wall body 1712 that is located at base 1711 top it is generally the case that base 1711 It is toroidal for circular, wall body 1712, both coincide so that magnet steel 1710 is cylindrical in shape, its profile is in " u " shape.
The material of Magnetitum 1720 is magnetic material, such as aluminum nickel cobalt and terres rares (as neodymium ferro-boron) etc., for producing magnetic energy, shape Shape is mostly circular, oval, also has assembling to need and particular design becomes special-shaped, such as square, triangle etc., positioned at base 1711 On, among the region that surrounds of wall body 1712, Magnetitum 1720 is general and base 1711 directly contact, and stays and wall body 1712 between There is space, and non-direct contact.
Washer 1730 also known as upper plate, upper piece, be typically stamped to form by hot rolled steel plate (phosphorus content), shape be mostly circular, Ellipse, also has assembling to need and particular design becomes special-shaped, and such as square, triangle etc., on Magnetitum 1720, wall body 1712 Among the region surrounding, washer 1730 is general and Magnetitum 1720 directly contact, and leaves space and wall body 1712 between, and non-straight Contact.
In embodiments of the present invention, it is provided with least one first most advanced and sophisticated knot towards washer 1730 inside wall body 1712 Structure 1713, that is, the first cutting-edge structure 1713 is the end of wall body 1712, and volume is little compared with wall body 1712.
It is provided with least one second cutting-edge structure 1731 towards magnet steel 1710 outside washer 1730, that is, second is most advanced and sophisticated Structure 1731 is the end of washer 1730, and volume is little compared with washer 1730.
In implementing, the first cutting-edge structure 1713 is equal with described second cutting-edge structure 1731 quantity, position is relative.
As shown in figure 18, magnetic circuit gap 1740, also known as magnetic gap (gap), first are formed between washer 1730 and wall body 1712 The topside area of cutting-edge structure 1713 is less than surface area in magnetic circuit gap 1740 for the wall body 1712, the first cutting-edge structure 1713 Topside area is less than surface area in magnetic circuit gap 1740 for the washer 1730.
The topside area of the second cutting-edge structure 1731 is less than surface area in magnetic circuit gap 1740 for the washer 1730, the second point The topside area of end structure 1731 is less than surface area in magnetic circuit gap 1740 for the wall body 1712.
In order to ensure the turn-on effect in magnetic field, at least part of structure of the first cutting-edge structure 1713 is located at magnetic circuit gap 1740 In, that is, the first cutting-edge structure 1713 can have part-structure to be located at outside magnetic circuit gap 1740.
At least part of structure of the second cutting-edge structure 1731 is located at magnetic circuit gap 1740, and that is, the second cutting-edge structure 1731 is permissible Part-structure is had to be located at outside magnetic circuit gap 1740.
When the quantity of the first cutting-edge structure 1713 is two or more, between multiple first cutting-edge structures 1713 Distance the distance between (i.e. first the first cutting-edge structure 1713 with last the first cutting-edge structure 1713) is more than or equal to The width in magnetic circuit gap 1740, such as the distance between first cutting-edge structure 1713 are 1-1.5 times of the width in magnetic circuit gap 1740.
When the quantity of the second cutting-edge structure 1731 is two or more, between multiple second cutting-edge structures 1731 Distance the distance between (i.e. first the second cutting-edge structure 1731 with last the second cutting-edge structure 1731) is more than or equal to The width in magnetic circuit gap 1740, such as the distance between second cutting-edge structure 1731 are 1-1.5 times of the width in magnetic circuit gap 1740.
As shown in figure 19, in order to improve the turn-on effect in magnetic field, wall body 1712 has protrusion knot in magnetic circuit gap 1740 Structure 17121, projective structure 17121 exceeds the inside edge of wall body 1712.
Meanwhile, produce for convenience, in one example, the first cutting-edge structure can be set by way of fluting 1713, specifically, the first groove 17122 can be set in projective structure 17121, with the first groove 17122 both sides Structure forms the first cutting-edge structure 1713.
In order to improve the turn-on effect in magnetic field, the marginal texture 1732 of washer 1730 exceeds the outer ledge of Magnetitum 1720.
Meanwhile, produce for convenience, in one example, the second cutting-edge structure can be set by way of fluting 1731, specifically, the second groove 1733 can be provided with marginal texture 1732, with the knot in the second groove 1733 both sides It is configured to the second cutting-edge structure 1731.
In implementing, after Magnetitum 120 magnetizes, form magnetic field, produce magnetic force, there is n (northern) at the two ends of Magnetitum 120 Pole, s (southern) pole, inside Magnetitum 120, flux is from s pole to n pole, and outside is from n pole to s pole, and magnet steel 110 is made with washer 120 For the effect of magnetic conduction, i.e. magnet steel 1710 passes through the first cutting-edge structure 1713, washer 1730 is led by the second cutting-edge structure 1731 Logical magnetic field.
For making those skilled in the art more fully understand the embodiment of the present invention, to illustrate below by way of specific magnetic circuit simulation The magnetic circuit system of the embodiment of the present invention.
First, magnetic circuit simulation is carried out to traditional magnetic circuit system, its Distribution of Magnetic Field is as shown in Figure 5.
Wherein, the magnetic field intensity of a route (i.e. line segment in magnetic circuit gap shown in Fig. 5) in magnetic circuit gap as shown in Figure 5 As shown in fig. 6, its transverse axis be Fig. 5 in this route position (i.e. one end of the line segment in magnetic circuit gap shown in Fig. 5 be position 0, separately One end be position 4), the longitudinal axis be magnetic field intensity.
As shown in figure 5, in the middle part of this route magnetic field intensity value highest, effective magnetic energy integrated distribution in magnetic circuit gap, If beyond the scope in magnetic circuit gap, magnetic field intensity reduces rapidly.
Voice coil loudspeaker voice coil this line-of-road movement typically in magnetic circuit gap as shown in Figure 5, its stress can pass through equation below meter Calculate:
F=bil
Wherein, f be Ampere force, b be magnetic field intensity, i be current value in voice coil loudspeaker voice coil, l is in the length in magnetic field for voice coil loudspeaker voice coil.
After voice coil position leaves magnetic circuit gap, magnetic field intensity starts to reduce rapidly, and voice coil loudspeaker voice coil is in the length in magnetic field Also diminish, in the case that the current value in voice coil loudspeaker voice coil is constant, the Ampere force suffered by voice coil loudspeaker voice coil can strongly reduce, and voice coil loudspeaker voice coil is leaving magnetic circuit Gap farther out when, power is poor, now due to vibrational system and damping act on increase, easily cause obvious non-thread Property distortion.
2nd, apply the embodiment of the present invention, magnetic circuit simulation is carried out to traditional magnetic circuit system, its Distribution of Magnetic Field such as Figure 20 institute Show.
Wherein, in magnetic circuit gap as shown in figure 20, the magnetic field of a route (i.e. line segment in magnetic circuit gap shown in Figure 20) is strong As shown in figure 21, its transverse axis is that (i.e. one end of the line segment in magnetic circuit gap shown in Figure 21 is position for the position of this route in Figure 21 to degree Set to 0, the other end be position 4), the longitudinal axis be magnetic field intensity.
As shown in figure 21, in the middle part of this route, the value of magnetic field intensity decreases, but, the distribution in magnetic field is except being distributed in magnetic In the gap of road, if beyond the scope in magnetic circuit gap, magnetic field intensity slows down, and has widened the distribution of Effective magnetic energy.
Voice coil loudspeaker voice coil this line-of-road movement typically in magnetic circuit gap as shown in figure 21, its stress can pass through equation below meter Calculate:
F=bil
Wherein, f be Ampere force, b be magnetic field intensity, i be current intensity in voice coil loudspeaker voice coil, l is in the length in magnetic field for voice coil loudspeaker voice coil Degree.
So, in the embodiment of the present invention, using the most advanced and sophisticated clustering phenomena of magnetic, it is provided with least one direction inside wall body First cutting-edge structure of washer, and, it is provided with least one second cutting-edge structure towards magnet steel outside washer, thus arriving Reach the effect in guiding magnetic field, magnetic field is passed through in magnetic conductive media, and for sharp position, the physical effect causing can be higher, that is, Magnetic field intensity can strengthen.
After voice coil position leaves magnetic circuit gap, magnetic field intensity reduces slowly, and the length that voice coil loudspeaker voice coil is in magnetic field diminishes, In the case that the current value in voice coil loudspeaker voice coil is constant, the Ampere force suffered by voice coil loudspeaker voice coil slowly reduces, so that voice coil loudspeaker voice coil stress is whole Become in magnetic field to equalize, and the broadening of magnetic energy, so that the effect of Ampere force suffered by voice coil loudspeaker voice coil is bigger, allows voice coil loudspeaker voice coil leaving Magnetic circuit gap farther out when it is also possible to there be preferable power, improve loudspeaker sensitivity, slow down non-linear distortion.
And, big transformation is not carried out to magnetic circuit system, not to increasing magnetic energy or reducing magnetic circuit gap, to add High-intensity magnetic field for the effect of voice coil loudspeaker voice coil, therefore, it is to avoid leakage field, thus avoid magnetic energy waste and impact around electronic device Normal operation.
Embodiment six
With reference to Figure 22, show the profile of the speaker of another kind of exemplary embodiment of the present invention.
As shown in figure 22, speaker 2200 includes the structures such as vibrational system, magnetic circuit system and support system.
Wherein, support system includes the structures such as frame, packing ring, dust cap, terminal board, lead.
Frame, is so that each several part (vibrational system, magnetic circuit system and support system etc.) is combined together, plays overall attachment With the effect connecting.
Dust cap, is mainly used in preventing dust and other debris from entering magnetic circuit system and attractive in appearance being used for.To tonequality table Now part master control high frequency show, sound material soft or hard/radian size and different, material has mylar (mylar), silk, aluminum etc..
Packing ring, is mainly used in allowing vibrating diaphragm and frame preferably to bind, and the control of loudspeaker edge height.
Terminal board, mainly plays welding external lead wire, is the connection member of external connection and voice coil loudspeaker voice coil.
Lead, acts primarily as the effect that silver-colored spring is connected with terminal board.
Vibrational system includes vibrating diaphragm 2250, voice coil loudspeaker voice coil 2240 and plays the structures such as ripple.
Vibrating diaphragm, including aluminium film, ceramic membrane, silkworm silk film, titanium film, beryllium film etc., by the speed promoting vibrating diaphragm, to produce height Low frequency.
Voice coil loudspeaker voice coil is wound around according to circular manner by metallic coil, can be with conducting electric current.
Play ripple also known as antivibrator, centring disk, mainly have braking action and center holding effect.It can make voice coil loudspeaker voice coil in magnetic In gap during motion, will not magnetic to magnet steel or Magnet.
Certainly, the structure of above-mentioned speaker is intended only as example, when implementing the embodiment of the present invention, can be according to actual feelings Condition arranges the structure of other speakers, and the embodiment of the present invention is not any limitation as to this.In addition, the structure except above-mentioned speaker Outward, those skilled in the art can also adopt the structure of other speakers according to actual needs, and the embodiment of the present invention is to this not yet It is any limitation as.
Magnetic circuit system includes the structures such as magnet steel 2210, Magnetitum 2220 and washer 2230.
Wherein, the wall body 2212 that magnet steel 2210 has base 2211 and is located at base 2211 top.
Among the region that Magnetitum 2220 is located on base 2211, wall body 2212 surrounds.
Among the region that washer 2230 is located on Magnetitum 2220, wall body 2212 surrounds.
It is provided with least one first cutting-edge structure 2213 towards washer 2230 inside wall body 2212, and, in China It is provided with least one second cutting-edge structure 2231 towards magnet steel 2210 outside department 2230.
In one embodiment of the invention, magnetic circuit gap, the first most advanced and sophisticated knot are formed between washer 2230 and wall body 2212 The topside area of structure 2213 is less than surface area in magnetic circuit gap for the wall body 2212, and the topside area of the first cutting-edge structure 2213 is little In surface area in magnetic circuit gap for the washer 2230；
The topside area of the second cutting-edge structure 2231 is less than surface area in magnetic circuit gap for the washer 2230, the second most advanced and sophisticated knot The topside area of structure 3321 is less than surface area in magnetic circuit gap for the wall body 2212.
In one embodiment of the invention, magnetic circuit gap, the first most advanced and sophisticated knot are formed between washer 2230 and wall body 2212 At least part of structure of structure 2213 is located in magnetic circuit gap；
At least part of structure of the second cutting-edge structure 2231 is located in magnetic circuit gap.
In one embodiment of the invention, when the quantity of the first cutting-edge structure 2213 is two or more, many The distance between individual first cutting-edge structure 2213 is more than or equal to the width in magnetic circuit gap；
When the quantity of the second cutting-edge structure 2231 is two or more, between multiple second cutting-edge structures 2231 Distance is more than or equal to the width in magnetic circuit gap.
In one embodiment of the invention, the first cutting-edge structure 2213 and the second cutting-edge structure 2231 quantity is equal, position Put relatively.
In one embodiment of the invention, wall body 2212 has projective structure in magnetic circuit gap, and projective structure exceeds The inside edge of wall body 2210；
It is provided with the first groove in projective structure, the first cutting-edge structure is formed with the structure in the first groove both sides 2213.
In one embodiment of the invention, the marginal texture of washer 2230 exceeds the outer ledge of Magnetitum 2220；
It is provided with the second groove in marginal texture, the second cutting-edge structure is formed with the structure in the second groove both sides 2231.
After Magnetitum 2220 magnetizes, form magnetic field, magnet steel 2210 passes through the first cutting-edge structure 2213, washer 2230 passes through the Two cutting-edge structure 2231 turns on magnetic field.
Voice coil loudspeaker voice coil 2240 is drawn two leads and is soldered to terminal board, and terminal board is connected with external electric signal, and the electric current of change enters Enter voice coil loudspeaker voice coil 2240.
When electric current enters voice coil loudspeaker voice coil 2240, voice coil loudspeaker voice coil 2240 is between the first cutting-edge structure 2213 and the second cutting-edge structure 2231 Stress in the magnetic field of conducting, promotes vibrating diaphragm 2250 to move back and forth, produces sound.
In embodiments of the present invention, due to the application basic simlarity of magnetic circuit system and embodiment five, so the comparison of description Simply, in place of correlation, the part referring to embodiment five illustrates, embodiment of the present invention here is not described in detail.
So, in the embodiment of the present invention, using the most advanced and sophisticated clustering phenomena of magnetic, it is provided with least one direction inside wall body First cutting-edge structure of washer, and, it is provided with least one second cutting-edge structure towards magnet steel outside washer, thus arriving Reach the effect in guiding magnetic field, magnetic field is passed through in magnetic conductive media, and for sharp position, the physical effect causing can be higher, that is, Magnetic field intensity can strengthen.
After voice coil position leaves magnetic circuit gap, magnetic field intensity reduces slowly, and the length that voice coil loudspeaker voice coil is in magnetic field diminishes, In the case that the current value in voice coil loudspeaker voice coil is constant, the Ampere force suffered by voice coil loudspeaker voice coil slowly reduces, so that voice coil loudspeaker voice coil stress is whole Become in magnetic field to equalize, and the broadening of magnetic energy, so that the effect of Ampere force suffered by voice coil loudspeaker voice coil is bigger, allows voice coil loudspeaker voice coil leaving Magnetic circuit gap farther out when it is also possible to there be preferable power, improve loudspeaker sensitivity, slow down non-linear distortion.
And, big transformation is not carried out to magnetic circuit system, not to increasing magnetic energy or reducing magnetic circuit gap, to add High-intensity magnetic field for the effect of voice coil loudspeaker voice coil, therefore, it is to avoid leakage field, thus avoid magnetic energy waste and impact around electronic device Normal operation.
Figure 23 is the structural representation of the mobile terminal of one embodiment of the invention.Specifically, the mobile terminal in Figure 23 2300 can be mobile phone, panel computer, personal digital assistant (personaldigital assistant, pda) or vehicle mounted electric Brain etc..
Mobile terminal 2300 in Figure 23 includes radio frequency (radiofrequency, rf) circuit 2310, memorizer 2320, defeated Enter unit 2330, display unit 2340, processor 2360, voicefrequency circuit 2370, wifi (wirelessfidelity) module 2380 and power supply 2390.
Wherein, input block 2330 can be used for numeral or the character information of receiving user's input, and produces whole with mobile The user setup at end 2300 and the relevant signal input of function control.Specifically, in the embodiment of the present invention, this input block 2330 can include contact panel 2331.Contact panel 2331, also referred to as touch screen, can collect user thereon or neighbouring touch Touch operation (such as user uses the operation on contact panel 2331 of any suitable object such as finger, stylus or adnexa), and Corresponding attachment means are driven according to formula set in advance.Optionally, contact panel 2331 may include touch detecting apparatus and Two parts of touch controller.Wherein, touch detecting apparatus detect the touch orientation of user, and detect the letter that touch operation brings Number, transmit a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into Contact coordinate, then give this processor 2360, and can the order sent of receiving processor 2360 being executed.Furthermore, it is possible to Contact panel 2331 is realized using polytypes such as resistance-type, condenser type, infrared ray and surface acoustic waves.Except contact panel 2331, input block 2330 can also include other input equipments 2332, and other input equipments 2332 can include but is not limited to One of physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc. or many Kind.
Wherein, display unit 2340 can be used for showing by the information of user input or the information and the movement that are supplied to user The various menu interfaces of terminal 2300.Display unit 2340 may include display floater 2341, optionally, using lcd or can have The forms such as machine light emitting diode (organiclight-emittingdiode, oled) are configuring display floater 2341.
It should be noted that contact panel 2331 can cover display floater 2341, form touch display screen, when this touch display screen Detect thereon or after neighbouring touch operation, send processor 2360 to determine the type of touch event, with post processing Device 2360 provides corresponding visual output according to the type of touch event in touch display screen.
Touch display screen includes Application Program Interface viewing area and conventional control viewing area.This Application Program Interface viewing area And the arrangement mode of this conventional control viewing area does not limit, can for being arranged above and below, left-right situs etc. can distinguish two and show Show the arrangement mode in area.This Application Program Interface viewing area is displayed for the interface of application program.Each interface is permissible Comprise the interface elements such as icon and/or the widget desktop control of at least one application program.This Application Program Interface viewing area It can also be the empty interface not comprising any content.This conventional control viewing area is used for showing the higher control of utilization rate, for example, Application icons such as settings button, interface numbering, scroll bar, phone directory icon etc..
Wherein processor 2360 is the control centre of mobile terminal 2300, using various interfaces and connection whole mobile phone Various pieces, be stored in software program and/or module in first memory 2321 by running or executing, and call and deposit Data in second memory 2322 for the storage, the various functions of execution mobile terminal 2300 and processing data, thus to mobile whole End 2300 carries out integral monitoring.Optionally, processor 2360 may include one or more processing units.
In embodiments of the present invention, voicefrequency circuit 2370 includes speaker, and described speaker includes vibrational system and magnetic circuit System；
Described vibrational system includes vibrating diaphragm and voice coil loudspeaker voice coil；
Described magnetic circuit system includes magnet steel, Magnetitum and washer；
Described magnet steel has base and is located at the wall body above described base；
Among the region that described Magnetitum is located on described base, described wall body surrounds；
Among the region that described washer is located on described Magnetitum, described wall body surrounds；
It is provided with least one first cutting-edge structure towards described washer in described wall body；And/or, in described washer In be provided with least one second cutting-edge structure towards described magnet steel
Described vibrating diaphragm is located on described magnet steel and described washer, and described voice coil loudspeaker voice coil is suspended under described vibrating diaphragm；
The both sides of described voice coil loudspeaker voice coil are described first cutting-edge structure and/or described second cutting-edge structure.
Alternatively, magnetic circuit gap, the topside area of described first cutting-edge structure are formed between described washer and described wall body Less than surface area in described magnetic circuit gap for the described wall body, the topside area of described first cutting-edge structure exists less than described washer Surface area in described magnetic circuit gap；
Form magnetic circuit gap, the topside area of described second cutting-edge structure is less than described between described washer and described wall body Surface area in described magnetic circuit gap for the washer, the topside area of described second cutting-edge structure is less than described wall body in described magnetic circuit Surface area in gap.
Alternatively, between described washer and described wall body formed magnetic circuit gap, described first cutting-edge structure at least part of Structure is located in described magnetic circuit gap, and at least part of structure of described second cutting-edge structure is located in described magnetic circuit gap.
Alternatively, when the quantity of described first cutting-edge structure is two or more, multiple described first most advanced and sophisticated knots The distance between structure is more than or equal to the width in described magnetic circuit gap；
When the quantity of described second cutting-edge structure is two or more, between multiple described second cutting-edge structures Distance is more than or equal to the width in described magnetic circuit gap.
Alternatively, the marginal texture of described washer exceeds the outer ledge of described Magnetitum.
Alternatively, described wall body has projective structure in described magnetic circuit gap, and described projective structure exceeds described wall body Inside edge；
First groove is set in described projective structure, forms first with the structure of the described first groove both sides of son most advanced and sophisticated Structure.
Alternatively, described wall body has projective structure in described magnetic circuit gap, and described projective structure exceeds described wall body Inside edge.
Alternatively, the marginal texture of described washer exceeds the outer ledge of described Magnetitum；
It is provided with the second groove in described marginal texture, with the structure in described second groove both sides for the second most advanced and sophisticated knot Structure.
Alternatively, described first cutting-edge structure is equal with described second cutting-edge structure quantity, position is relative.
So, in the embodiment of the present invention, using the most advanced and sophisticated clustering phenomena of magnetic, it is provided with least one direction inside wall body First cutting-edge structure of washer, and/or, it is provided with least one second cutting-edge structure towards described magnet steel outside washer, Thus reaching the effect in guiding magnetic field, magnetic field is passed through in magnetic conductive media, and for sharp position, the physical effect causing can be more By force, that is, magnetic field intensity can strengthen.
After voice coil position leaves magnetic circuit gap, magnetic field intensity reduces slowly, and the length that voice coil loudspeaker voice coil is in magnetic field diminishes, In the case that the current value in voice coil loudspeaker voice coil is constant, the Ampere force suffered by voice coil loudspeaker voice coil slowly reduces, so that voice coil loudspeaker voice coil stress is whole Become in magnetic field to equalize, and the broadening of magnetic energy, so that the effect of Ampere force suffered by voice coil loudspeaker voice coil is bigger, allows voice coil loudspeaker voice coil leaving Magnetic circuit gap farther out when it is also possible to there be preferable power, improve loudspeaker sensitivity, slow down non-linear distortion.
And, big transformation is not carried out to magnetic circuit system, not to increasing magnetic energy or reducing magnetic circuit gap, to add High-intensity magnetic field for the effect of voice coil loudspeaker voice coil, therefore, it is to avoid leakage field, thus avoid magnetic energy waste and impact around electronic device Normal operation.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.

Claims (10)

1. a kind of magnetic circuit system is it is characterised in that described magnetic circuit system includes magnet steel, Magnetitum and washer；
Described magnet steel has base and is located at the wall body above described base；
Among the region that described Magnetitum is located on described base, described wall body surrounds；
Among the region that described washer is located on described Magnetitum, described wall body surrounds；
It is provided with least one first cutting-edge structure towards described washer inside described wall body；
And/or,
It is provided with least one second cutting-edge structure towards described magnet steel outside described washer.
2. magnetic circuit system according to claim 1 is it is characterised in that form between magnetic circuit between described washer and described wall body Gap；
At least part of structure of described first cutting-edge structure is located in described magnetic circuit gap；
And/or,
At least part of structure of described second cutting-edge structure is located in described magnetic circuit gap.
3. magnetic circuit system according to claim 2 it is characterised in that when described first cutting-edge structure quantity be two or During two or more, the distance between multiple described first cutting-edge structures are more than or equal to the width in described magnetic circuit gap；And/or,
When the quantity of described second cutting-edge structure is two or more, the distance between multiple described second cutting-edge structures Width more than or equal to described magnetic circuit gap.
4. the magnetic circuit system according to any one of claim 1-3 is it is characterised in that described wall body is in described magnetic circuit gap There is projective structure, described projective structure exceeds the inside edge of described wall body；
First groove is set in described projective structure, to form the first cutting-edge structure in described first groove both sides.
5. the magnetic circuit system according to any one of claim 1-3, the marginal texture of described washer exceeds the outer of described Magnetitum Lateral edges；
It is provided with the second groove in described marginal texture, to form the second cutting-edge structure in described second groove both sides.
6. the magnetic circuit system according to any one of claim 1-3 is it is characterised in that described first cutting-edge structure and described Two cutting-edge structure quantity are equal, position relative.
7. a kind of speaker is it is characterised in that described speaker includes vibrational system and magnetic circuit system；
Described vibrational system includes vibrating diaphragm and voice coil loudspeaker voice coil；
Described magnetic circuit system includes magnet steel, Magnetitum and washer；
Described magnet steel has base and is located at the wall body above described base；
Among the region that described Magnetitum is located on described base, described wall body surrounds；
Among the region that described washer is located on described Magnetitum, described wall body surrounds；
It is provided with least one first cutting-edge structure towards described washer inside described wall body, and/or, outside described washer Side is provided with least one second cutting-edge structure towards described magnet steel；
Described vibrating diaphragm is located on described magnet steel and described washer, and described voice coil loudspeaker voice coil is suspended under described vibrating diaphragm；
The both sides of described voice coil loudspeaker voice coil are described first cutting-edge structure and/or described second cutting-edge structure.
8. speaker according to claim 7 is it is characterised in that form between magnetic circuit between described washer and described wall body Gap；
At least part of structure of described first cutting-edge structure is located in described magnetic circuit gap；
And/or,
At least part of structure of described second cutting-edge structure is located in described magnetic circuit gap.
9. speaker according to claim 8 is it is characterised in that the quantity working as described first cutting-edge structure is two or two When individual above, the distance between multiple described first cutting-edge structures are more than or equal to the width in described magnetic circuit gap；And/or,
When the quantity of described second cutting-edge structure is two or more, the distance between multiple described second cutting-edge structures Width more than or equal to described magnetic circuit gap.
10. a kind of mobile terminal is it is characterised in that described mobile terminal includes the speaker described in any one of claim 7-8.
CN201610985166.2A 2016-10-31 2016-10-31 A kind of magnetic circuit system, loudspeaker and mobile terminal Active CN106375918B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2178974Y (en) * 1992-11-25 1994-10-05 林和鼎 New magnetic circuit structure moving coil type loudspeaker
CN203827507U (en) * 2014-02-09 2014-09-10 江阴市丰鸣宇电子有限公司 Novel loudspeaker magnetic circuit system
CN203827506U (en) * 2014-02-09 2014-09-10 江阴市丰鸣宇电子有限公司 Loudspeaker-distortion-reducing magnetic circuit system
CN105812997A (en) * 2016-03-14 2016-07-27 青岛海信电器股份有限公司 Loudspeaker
CN205491141U (en) * 2016-04-12 2016-08-17 深圳市鲁粤盛科技有限公司 Ultra -thin speaker of interior magnetic -type

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2178974Y (en) * 1992-11-25 1994-10-05 林和鼎 New magnetic circuit structure moving coil type loudspeaker
CN203827507U (en) * 2014-02-09 2014-09-10 江阴市丰鸣宇电子有限公司 Novel loudspeaker magnetic circuit system
CN203827506U (en) * 2014-02-09 2014-09-10 江阴市丰鸣宇电子有限公司 Loudspeaker-distortion-reducing magnetic circuit system
CN105812997A (en) * 2016-03-14 2016-07-27 青岛海信电器股份有限公司 Loudspeaker
CN205491141U (en) * 2016-04-12 2016-08-17 深圳市鲁粤盛科技有限公司 Ultra -thin speaker of interior magnetic -type

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