CN106375918B

CN106375918B - A kind of magnetic circuit system, loudspeaker and mobile terminal

Info

Publication number: CN106375918B
Application number: CN201610985166.2A
Authority: CN
Inventors: 阮清波; 王志远
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2016-10-31
Filing date: 2016-10-31
Publication date: 2019-05-17
Anticipated expiration: 2036-10-31
Also published as: CN106375918A

Abstract

The embodiment of the invention provides a kind of magnetic circuit system, loudspeaker and mobile terminal, which includes magnet steel, magnetite and washer；The magnet steel has pedestal and the wall body above the pedestal；Among the region that the magnetite is located on the pedestal, the wall body surrounds；Among the region that the washer is located on the magnetite, the wall body surrounds；At least one first cutting-edge structure towards the washer is provided on the inside of the wall body；And/or at least one second cutting-edge structure towards the magnet steel is provided on the outside of the washer.To reach the effect in guidance magnetic field, magnetic field passes through in magnetic conductive media, and for sharp position, caused physical effect can be stronger, i.e., magnetic field strength can enhance.

Description

A kind of magnetic circuit system, loudspeaker and mobile terminal

Technical field

The present invention relates to field of communication technology more particularly to a kind of magnetic circuit systems, a kind of loudspeaker and a kind of mobile terminal.

Background technique

With the development of mobile communication technology, mobile terminal has become a part indispensable in people's life, real Accessible call whenever and wherever possible, also, many common functions that mobile terminal is included are showed, have been brought just to people's life Benefit.

In the terminal, in order to be conversed, played the operation such as song, it will be installed loudspeaker substantially, i.e., turn electric energy It is changed to the energy transducer of sound.

In coil-moving speaker, especially in miniature coil-moving speaker, important feature group that magnetic circuit system is At part, the magnetic energy being capable of providing is utilized by voice coil, generates sound.

When voice coil leaves magnetic circuit system, the stress of the strength reduction in magnetic field, voice coil is also decreased, and is be easy to cause and is compared Apparent non-linear distortion, leading to problems such as the sound issued generate, muddy, scared, hair is husky, hair is broken, hair is fried or hardens, sound Qualitative change is poor.

If reinforcing effect of the magnetic field for voice coil by increasing magnetic energy or reducing magnetic circuit gap, by the limit of material System is easy leakage field, not only magnetic energy is caused to waste, but also influences the normal operation of the electronic device of surrounding.

Summary of the invention

The embodiment of the present invention provides a kind of magnetic circuit system, with solve how under the premise of avoiding leakage field, improve it is non-linear The problem of distortion.

In a first aspect, providing a kind of magnetic circuit system, the magnetic circuit system includes magnet steel, magnetite and washer；

The magnet steel has pedestal and the wall body above the pedestal；

Among the region that the magnetite is located on the pedestal, the wall body surrounds；

Among the region that the washer is located on the magnetite, the wall body surrounds；

At least one first cutting-edge structure towards the washer is provided on the inside of the wall body；

And/or

At least one second cutting-edge structure towards the magnet steel is provided on the outside of the washer.

In a first aspect, providing a kind of loudspeaker, the loudspeaker includes vibrational system and magnetic circuit system；

The vibrational system includes vibrating diaphragm and voice coil；

The magnetic circuit system includes magnet steel, magnetite and washer；

The magnet steel has pedestal and the wall body above the pedestal；

At least one first cutting-edge structure towards the washer is provided on the inside of the wall body, and/or, in the China Department outside is provided at least one second cutting-edge structure towards the magnet steel；

The vibrating diaphragm is located on the magnet steel and the washer, and the voice coil is suspended under the vibrating diaphragm；

The two sides of the voice coil are first cutting-edge structure and/or second cutting-edge structure.

The third aspect, provides a kind of mobile terminal, and the mobile terminal includes above-mentioned loudspeaker.

In this way, using the tip clustering phenomena of magnetic, at least one direction is provided on the inside of wall body in the embodiment of the present invention First cutting-edge structure of washer, and/or, at least one second cutting-edge structure towards the magnet steel is provided on the outside of washer, To reach the effect in guidance magnetic field, magnetic field passes through in magnetic conductive media, and for sharp position, caused physical effect can be more By force, i.e., magnetic field strength can enhance.

After voice coil position leaves magnetic circuit gap, magnetic field strength is reduced slowly, and voice coil is in the length in magnetic field and becomes smaller, In the case that current value in voice coil is constant, Ampere force suffered by voice coil slowly reduces, and voice coil stress can be made entire Become balanced in magnetic field, and the broadening of magnetic energy can make the effect of Ampere force suffered by voice coil bigger, and voice coil is allowed to leave Magnetic circuit gap farther out when, can also have preferable power, improve the sensitivity of loudspeaker, slow down non-linear distortion.

Also, big transformation is not carried out to magnetic circuit system, not to increasing magnetic energy or reducing magnetic circuit gap, to add Therefore effect of the high-intensity magnetic field for voice coil avoids leakage field, the electronic device of surrounding is wasted and influenced so as to avoid magnetic energy Normal operation.

Detailed description of the invention

In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by institute in the description to the embodiment of the present invention Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings Obtain other attached drawings.

Fig. 1 is a kind of sectional view of the magnetic circuit system of exemplary embodiment of the invention；

Fig. 2 is a kind of partial enlarged view of the magnetic circuit system of exemplary embodiment of the invention；

Fig. 3 is the partial enlarged view of the magnetic circuit system of another exemplary embodiment of the invention；

Fig. 4 is the partial enlarged view of the magnetic circuit system of another exemplary embodiment of the invention；

Fig. 5 is a kind of exemplary diagram of the magnetic circuit simulation of traditional magnetic circuit system；

Fig. 6 is a kind of exemplary diagram of the magnetic field strength of the magnetic circuit simulation of traditional magnetic circuit system；

Fig. 7 is a kind of exemplary diagram of the magnetic circuit simulation of the magnetic circuit system of exemplary embodiment of the invention；

Fig. 8 is a kind of exemplary diagram of the magnetic field strength of the magnetic circuit simulation of the magnetic circuit system of exemplary embodiment of the invention；

Fig. 9 is a kind of sectional view of the loudspeaker of exemplary embodiment of the invention；

Figure 10 is the sectional view of the magnetic circuit system of another exemplary embodiment of the invention；

Figure 11 is the partial enlarged view of the magnetic circuit system of another exemplary embodiment of the invention；

Figure 12 is the partial enlarged view of the magnetic circuit system of another exemplary embodiment of the invention；

Figure 13 is the partial enlarged view of the magnetic circuit system of another exemplary embodiment of the invention；

Figure 14 is the exemplary diagram of the magnetic circuit simulation of the magnetic circuit system of another exemplary embodiment of the invention；

Figure 15 is the example of the magnetic field strength of the magnetic circuit simulation of the magnetic circuit system of another exemplary embodiment of the invention Figure；

Figure 16 is a kind of sectional view of the loudspeaker of exemplary embodiment of the invention；

Figure 17 is the sectional view of the magnetic circuit system of another exemplary embodiment of the invention；

Figure 18 is the partial enlarged view of the magnetic circuit system of another exemplary embodiment of the invention；

Figure 19 is the partial enlarged view of the magnetic circuit system of another exemplary embodiment of the invention；

Figure 20 is a kind of exemplary diagram of the magnetic circuit simulation of the magnetic circuit system of exemplary embodiment of the invention；

Figure 21 is a kind of exemplary diagram of the magnetic field strength of the magnetic circuit simulation of the magnetic circuit system of exemplary embodiment of the invention；

Figure 22 is a kind of sectional view of the loudspeaker of exemplary embodiment of the invention；

Figure 23 is the structural schematic diagram of the mobile terminal of one embodiment of the invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts Example, shall fall within the protection scope of the present invention.

Embodiment one

Referring to Fig.1, a kind of sectional view of the magnetic circuit system of exemplary embodiment of the invention is shown.

As shown in Figure 1, the magnetic circuit system 100 is internal magnetization structure, and it is small compared with external magnetic type structure leakage field, small in size, it is suitable for The loudspeaker of micromation, to apply in the receiver, earphone components of mobile terminal (such as mobile phone, tablet computer etc.).

The magnetic circuit system 100 may include 130 (washer/ of magnet steel 110 (yoke), magnetite 120 (maghet) and washer plate)。

Magnet steel 110 is U iron (U-Yoke), and material is mostly SPCC (generally with cold rolling carbon steel sheet and steel band), SPCD (punching Pressure 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 production.

Magnet steel 110 has pedestal 111 and the wall body 112 above pedestal 111, it is generally the case that pedestal 111 is circle Shape, wall body 112 are annulus shape, and the two is coincide, so that magnet steel 110 is cylindrical in shape, its sectional view is " U "-shaped.

The material of magnetite 120 is magnetic material, such as alnico and terres rares (such as neodymium ferro-boron), for generating magnetic energy, shape Shape is mostly round, ellipse, also has assembling needs and special designing at abnormal shape, such as rectangular, triangle, is located at pedestal 111 On, wall body 112 surround region among, magnetite 120 is generally directly contacted with pedestal 111, and there are skies between wall body 112 Gap, and non-direct contact.

Washer 130 be also known as upper plate, upper piece, be generally stamped to form by hot rolled steel plate (phosphorus content), shape be mostly it is round, Ellipse also has assembling needs and special designing at abnormal shape, such as rectangular, triangle, is located on magnetite 120, wall body 112 wraps Among the region enclosed, washer 130 is generally directly contacted with magnetite 120, and there are gap between wall body 112, and indirect is connect Touching.

In embodiments of the present invention, at least one first cutting-edge structure towards washer 130 is provided on the inside of wall body 112 113, i.e. the end that the first cutting-edge structure 113 is wall body 112, volume is small compared with wall body 112.

As shown in Fig. 2, forming magnetic circuit gap 140, also known as magnetic gap (GAP), the first tip between washer 130 and wall body 112 The topside area of structure 113 is less than surface area of the wall body 112 in magnetic circuit gap 140, the topside area of the first cutting-edge structure 113 Less than surface area of the washer 130 in magnetic circuit gap 140.

In order to guarantee the turn-on effect in magnetic field, at least partly structure of the first cutting-edge structure 113 is located at magnetic circuit gap 140 In, i.e., the first cutting-edge structure 113 can have part-structure to be located at outside magnetic circuit gap 140.

When the quantity of the first cutting-edge structure 113 is two or more, between multiple first cutting-edge structures 113 away from It is greater than or equal to magnetic circuit from (i.e. the distance between first the first cutting-edge structure 113 and the last one 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, in order to improve the turn-on effect in magnetic field, the marginal texture 131 of washer 130 can exceed magnetite 120 Outer ledge.

As shown in figure 4, in order to improve the turn-on effect in 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 producing 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 arranged in projective structure 1121, formed with the structure in 1122 two sides of the first groove First cutting-edge structure 113.

In the concrete realization, after magnetite 120 magnetizes, magnetic field is formed, generates magnetic force, the both ends of magnetite 120 have N (north) Pole, S (south) pole, inside magnetite 120, flux is that from the pole S to the pole N, outside is that from the pole N to the pole S, magnet steel 110 and washer 120 are made For the effect of magnetic conduction, i.e., magnet steel 110 is by being connected magnetic field between the first cutting-edge structure 113 and washer 120.

Embodiment in order to enable those skilled in the art to better understand the present invention illustrates below by way of specific magnetic circuit simulation The magnetic circuit system of the embodiment of the present invention.

One, magnetic circuit simulation is carried out to traditional magnetic circuit system, Distribution of Magnetic Field is as shown in Figure 5.

Wherein, in magnetic circuit gap as shown in Figure 5 a route (line segment i.e. in magnetic circuit gap shown in Fig. 5) magnetic field strength As shown in fig. 6, its horizontal axis is that (one end of the line segment i.e. in magnetic circuit gap shown in Fig. 5 is position 0, separately for the position of the route in Fig. 5 One end is position 4), the longitudinal axis be magnetic field strength.

As shown in figure 5, the route in the middle part of magnetic field strength value highest, effective magnetic energy integrated distribution in magnetic circuit gap, If having exceeded the range in magnetic circuit gap, magnetic field strength is reduced rapidly.

The line-of-road movement of voice coil generally in magnetic circuit gap as shown in Figure 5, stress can pass through following formula meter It calculates:

F=BIL

Wherein, F is Ampere force, B is magnetic field strength, I is current value in voice coil, and L is that voice coil is in the length in magnetic field.

After voice coil position leaves magnetic circuit gap, magnetic field strength starts to reduce rapidly, and voice coil is in the length in magnetic field Also become smaller, in the case that the current value in voice coil is constant, Ampere force suffered by voice coil can be strongly reduced, and voice coil is leaving magnetic circuit Gap farther out when, power is poor, acts on increase due to vibrational system and damping at this time, be easy to cause obvious non-thread Property distortion.

Two, using the embodiment of the present invention, magnetic circuit simulation is carried out to traditional magnetic circuit system, Distribution of Magnetic Field is as shown in Figure 7.

Wherein, in magnetic circuit gap as shown in Figure 7 a route (line segment i.e. in magnetic circuit gap shown in Fig. 7) magnetic field strength As shown in figure 8, its horizontal axis is that (one end of the line segment i.e. in magnetic circuit gap shown in Fig. 8 is position 0, separately for the position of the route in Fig. 8 One end is position 4), the longitudinal axis be magnetic field strength.

As shown in figure 8, the value of magnetic field strength decreases in the middle part of the route, still, the distribution in magnetic field is in addition to being distributed in magnetic In the gap of road, if having exceeded the range in magnetic circuit gap, magnetic field strength slows down, and has widened the distribution of Effective magnetic energy.

The line-of-road movement of voice coil generally in magnetic circuit gap as shown in Figure 7, stress can pass through following formula meter It calculates:

F=BIL

Wherein, F is Ampere force, B is magnetic field strength, I is current strength in voice coil, and L is that voice coil is in the length in magnetic field Degree.

In this way, using the tip clustering phenomena of magnetic, at least one direction is provided on the inside of wall body in the embodiment of the present invention First cutting-edge structure of washer, to reach the effect in guidance magnetic field, magnetic field passes through in magnetic conductive media, for sharp portion Position, caused physical effect can be stronger, i.e., magnetic field strength can enhance.

Embodiment two

Referring to Fig. 9, a kind of sectional view of the loudspeaker of exemplary embodiment of the invention is shown.

As shown in figure 9, loudspeaker 900 includes the structures such as vibrational system, magnetic circuit system and support system.

Wherein, support system includes the structures such as frame, washer, dustproof cover, terminal board, lead.

Frame is to be combined together each section (vibrational system, magnetic circuit system and support system etc.), plays whole attachment With the effect of connection.

Dust cap is mainly used for preventing dust and other sundries from entering being used for for magnetic circuit system and beauty.To sound quality table The performance of now part master control high frequency, sound material is soft or hard/radian size and it is different, material has Mylar (polyester film), silk, aluminium etc..

Washer is mainly used for 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 connecting component of external connection and voice coil.

Lead mainly plays silver-colored spring and connect with terminal board.

Vibrational system includes the structures such as vibrating diaphragm 950, voice coil 940 and bullet wave.

Vibrating diaphragm, including aluminium film, ceramic membrane, silk film, titanium film, beryllium film etc., by the speed for pushing vibrating diaphragm, to generate height Low frequency.

Voice coil is wound by metallic coil according to circular manner, can be with conducting electric current.

It plays wave and is also known as damper, centring disk mainly has braking action and center holding effect.It can make voice coil in magnetic In gap when movement, will not magnetic to magnet steel or magnet.

Certainly, the structure of above-mentioned loudspeaker is intended only as example, in implementing the embodiments of the present invention, can be according to practical feelings The structure of other loudspeakers is arranged in condition, and the embodiments of the present invention are not limited thereto.In addition, in addition to the structure of above-mentioned loudspeaker Outside, those skilled in the art can also use the structure of other loudspeakers according to actual needs, the embodiment of the present invention to this not yet It limits.

Magnetic circuit system includes the structures such as magnet steel 910, magnetite 920 and washer 930.

Wherein, magnet steel 910 has pedestal 911 and the wall body 912 above pedestal 911.

Magnetite 920 is located on pedestal 911, among 912 area encompassed of wall body.

Washer 930 is located on magnetite 920, among 912 area encompassed of wall body.

In embodiments of the present invention, at least one first cutting-edge structure towards washer 930 is provided on the inside of wall body 912 913。

Vibrating diaphragm 950 is located on magnet steel 910 and washer 930, and voice coil 940 is suspended under vibrating diaphragm 950.

950 side of voice coil is the first cutting-edge structure 913 of magnet steel 910, and the other 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 of the wall body 912 in magnetic circuit gap, and the topside area of the first cutting-edge structure 913 is less than China Surface area of the department 930 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 partly structure is located in magnetic circuit gap.

In one embodiment of the invention, multiple when the quantity of the first cutting-edge structure 913 is two or more The distance between first cutting-edge structure 913 is greater 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 magnetite 920.

In one example of an embodiment of the present invention, wall body 912 has projective structure in magnetic circuit gap, and projective structure is super The inside edge of wall body 912 out；

First groove is set in projective structure, to form the first cutting-edge structure 913 in the structure of the first groove two sides.

After magnetite 920 magnetizes, magnetic field is formed, magnet steel 910 between the first cutting-edge structure 913 and washer 930 by being connected Magnetic field.

Voice coil 940 draws two leads and is soldered to terminal board, and terminal board and external electric signal are connected, and the electric current of variation enters Voice coil 940.

When electric current enters voice coil 940, in the magnetic field that voice coil 940 is connected between the first cutting-edge structure 913 and washer 930 Stress pushes vibrating diaphragm 950 to move back and forth, and compressed air generates sound.

In embodiments of the present invention, since magnetic circuit system and the application of embodiment one are substantially similar, so the comparison of description Simply, related place illustrates that the embodiment of the present invention is not described in detail herein referring to the part of embodiment one.

Embodiment three

Referring to Fig.1 0, show the sectional view of the magnetic circuit system of another exemplary embodiment of the invention.

As shown in Figure 10, which is internal magnetization structure, small compared with external magnetic type structure leakage field, small in size, is applicable in In the loudspeaker of micromation, to apply receiver, the earphone components in mobile terminal (such as mobile phone, tablet computer etc.) In.

The magnetic circuit system 1000 may include magnet steel 1010 (yoke), magnetite 1020 (maghet) and washer 1030 (washer/plate)。

Magnet steel 1010 is U iron (U-Yoke), and material is mostly SPCC (generally with 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 pedestal 1011 and the wall body 1012 above pedestal 1011, it is generally the case that pedestal 1011 It is annulus shape for round, wall body 1012, the two is coincide, so that magnet steel 1010 is cylindrical in shape, its sectional view is " U "-shaped.

The material of magnetite 1020 is magnetic material, such as alnico and terres rares (such as neodymium ferro-boron), for generating magnetic energy, shape Shape is mostly round, ellipse, also has assembling needs and special designing at abnormal shape, such as rectangular, triangle, is located at pedestal 1011 On, wall body 1012 surround region among, magnetite 1020 is generally directly contacted with pedestal 1011, and is stayed between wall body 1012 There are gap, and non-direct contact.

Washer 1030 be also known as upper plate, upper piece, be generally stamped to form by hot rolled steel plate (phosphorus content), shape be mostly it is round, Ellipse also has assembling needs and special designing at abnormal shape, such as rectangular, triangle, is located on magnetite 1020, wall body 1012 Among the region of encirclement, washer 1030 is generally directly contacted with magnetite 1020, and there are gap between wall body 1012, and it is non-straight Contact.

In embodiments of the present invention, at least one ties towards the second tip of magnet steel 1010 in 1030 China and foreign countries' side of washer The end that structure 1031, i.e. the second cutting-edge structure 1031 are washer 1030, volume are small compared with washer 1030.

As shown in figure 11, formation magnetic circuit gap 1040, also known as magnetic gap (GAP) between washer 1030 and wall body 1012, second The topside area of cutting-edge structure 1031 is less than surface area of the washer 1030 in magnetic circuit gap 1040, the second cutting-edge structure 1031 Topside area is less than surface area of the wall body 1012 in magnetic circuit gap 1040.

In order to guarantee the turn-on effect in magnetic field, at least partly structure of the second cutting-edge structure 1031 is located at magnetic circuit gap 1040, i.e. the second cutting-edge structure 1031 can have part-structure 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 (i.e. the distance between first the second cutting-edge structure 1031 and the last one the second cutting-edge structure 1031) is greater 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 exceed 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 magnetite 1020 Outer ledge.

Meanwhile producing 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 in marginal texture 1032, in the knot of 1033 two sides of the second groove It is configured to the second cutting-edge structure 1031.

In the concrete realization, after magnetite 1720 magnetizes, magnetic field is formed, generates magnetic force, the both ends of magnetite 1720 have N (north) Pole, S (south) pole, inside magnetite 1720, flux is that from the pole S to the pole N, outside is from the pole N to the pole S magnet steel 1710 and washer 1730 effect as magnetic conduction, i.e. washer 1030 are by being connected magnetic field between the second cutting-edge structure 1031 and magnet steel 1010.

F=BIL

Two apply the embodiment of the present invention, carry out magnetic circuit simulation to traditional magnetic circuit system, Distribution of Magnetic Field is as shown in figure 14.

Wherein, the magnetic field of a route (line segment i.e. in magnetic circuit gap shown in Figure 14) is strong in magnetic circuit gap as shown in figure 14 As shown in figure 15, horizontal axis is that (one end of the line segment i.e. in magnetic circuit gap shown in Fig. 8 is position for the position of the route in Figure 15 to degree 0, the other end is position 4), the longitudinal axis be magnetic field strength.

As shown in figure 15, the value of magnetic field strength decreases in the middle part of the route, and still, the distribution in magnetic field is in addition to being distributed in magnetic In the gap of road, if having exceeded the range in magnetic circuit gap, magnetic field strength slows down, and has widened the distribution of Effective magnetic energy.

The line-of-road movement of voice coil generally in magnetic circuit gap as shown in figure 14, stress can pass through following formula meter It calculates:

F=BIL

In this way, using the tip clustering phenomena of magnetic, at least one direction is provided on the outside of washer in the embodiment of the present invention Second cutting-edge structure of magnet steel, to reach the effect in guidance magnetic field, magnetic field passes through in magnetic conductive media, for sharp portion Position, caused physical effect can be stronger, i.e., magnetic field strength can enhance.

Example IV

Referring to Fig.1 6, show the sectional view of the loudspeaker of another exemplary embodiment of the invention.

As shown in figure 16, loudspeaker 1600 includes the structures such as vibrational system, magnetic circuit system and support system.

Lead mainly plays silver-colored spring and connect with terminal board.

Vibrational system includes the structures such as vibrating diaphragm 1650, voice coil 1640 and bullet wave.

Magnetic circuit system includes the structures such as magnet steel 1610, magnetite 1620 and washer 1630.

Wherein, magnet steel 1610 has pedestal 1611 and the wall body 1612 above pedestal 1611.

Among the region that magnetite 1620 is located on pedestal 1611, wall body 1612 surrounds.

Among the region that washer 1630 is located on magnetite 1620, wall body 1612 surrounds.

In embodiments of the present invention, at least one is provided on the outside of washer 1630 to tie towards the second tip of magnet steel 1610 Structure 1631.

Vibrating diaphragm 1650 is located on magnet steel 1610 and washer 1630, and voice coil 1640 is suspended under vibrating diaphragm 1650.

1650 side of voice coil is magnet steel 1610, and the other side is the second cutting-edge structure 1631 of washer 1630.

In one embodiment of the invention, magnetic circuit gap, the second tip knot are formed between washer 1630 and wall body 1610 The topside area of structure 1631 is less than surface area of the washer 1630 in magnetic circuit gap, and the topside area of the second cutting-edge structure 1631 is small In surface area of the wall body 1610 in magnetic circuit gap.

In one embodiment of the invention, magnetic circuit gap, the second tip knot are formed between washer 1630 and wall body 1610 At least partly structure of structure 1631 is located in magnetic circuit gap.

In one embodiment of the invention, more when the quantity of the second cutting-edge structure 1631 is two or more The distance between a second cutting-edge structure 1631 is greater 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 the wall body.

In one embodiment of the invention, the marginal texture of washer 1630 exceeds the outer ledge of magnetite 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 two sides.

After magnetite 1620 magnetizes, magnetic field is formed, washer 1630 passes through between the second cutting-edge structure 1631 and magnet steel 1620 Magnetic field is connected.

Voice coil 1640 draws two leads and is soldered to terminal board, and terminal board and external electric signal are connected, the electric current of variation into Enter voice coil 1640.

When electric current enters voice coil 1640, magnetic that voice coil 1640 is connected between the second cutting-edge structure 1631 and magnet steel 1620 Stress in pushes vibrating diaphragm 1650 to move back and forth, and generates sound.

In embodiments of the present invention, since magnetic circuit system and the application of embodiment three are substantially similar, so the comparison of description Simply, related place illustrates that the embodiment of the present invention is not described in detail herein referring to the part of embodiment three.

Embodiment five

Referring to Fig.1 7, show the sectional view of the magnetic circuit system of another exemplary embodiment of the invention.

As shown in figure 17, which is internal magnetization structure, small compared with external magnetic type structure leakage field, small in size, is applicable in In the loudspeaker of micromation, to apply receiver, the earphone components in mobile terminal (such as mobile phone, tablet computer etc.) In.

The magnetic circuit system 1700 may include magnet steel 1710 (yoke), magnetite 1720 (maghet) and washer 1730 (washer/plate)。

Magnet steel 1710 is U iron (U-Yoke), and material is mostly SPCC (generally with 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 pedestal 1711 and the wall body 1712 above pedestal 1711, it is generally the case that pedestal 1711 It is annulus shape for round, wall body 1712, the two is coincide, so that magnet steel 1710 is cylindrical in shape, its sectional view is " U "-shaped.

The material of magnetite 1720 is magnetic material, such as alnico and terres rares (such as neodymium ferro-boron), for generating magnetic energy, shape Shape is mostly round, ellipse, also has assembling needs and special designing at abnormal shape, such as rectangular, triangle, is located at pedestal 1711 On, wall body 1712 surround region among, magnetite 1720 is generally directly contacted with pedestal 1711, and is stayed between wall body 1712 There are gap, and non-direct contact.

Washer 1730 be also known as upper plate, upper piece, be generally stamped to form by hot rolled steel plate (phosphorus content), shape be mostly it is round, Ellipse also has assembling needs and special designing at abnormal shape, such as rectangular, triangle, is located on magnetite 1720, wall body 1712 Among the region of encirclement, washer 1730 is generally directly contacted with magnetite 1720, and there are gap between wall body 1712, and it is non-straight Contact.

In embodiments of the present invention, at least one is provided on the inside of wall body 1712 to tie towards the first tip of washer 1730 The end that structure 1713, i.e. the first cutting-edge structure 1713 are wall body 1712, volume are small compared with wall body 1712.

At least one second cutting-edge structure 1731 towards magnet steel 1710, i.e. the second tip are provided on the outside of washer 1730 Structure 1731 is the end of washer 1730, and volume is small compared with washer 1730.

In the concrete realization, the first cutting-edge structure 1713 is equal with 1731 quantity of the second cutting-edge structure, position is opposite.

As shown in figure 18, formation magnetic circuit gap 1740, also known as magnetic gap (GAP) between washer 1730 and wall body 1712, first The topside area of cutting-edge structure 1713 is less than surface area of the wall body 1712 in magnetic circuit gap 1740, the first cutting-edge structure 1713 Topside area is less than surface area of the washer 1730 in magnetic circuit gap 1740.

The topside area of second cutting-edge structure 1731 is less than surface area of the washer 1730 in magnetic circuit gap 1740, the second point The topside area of end structure 1731 is less than surface area of the wall body 1712 in magnetic circuit gap 1740.

In order to guarantee the turn-on effect in magnetic field, at least partly structure of the first cutting-edge structure 1713 is located at magnetic circuit gap 1740 In, i.e., the first cutting-edge structure 1713 can have part-structure to be located at outside magnetic circuit gap 1740.

At least partly structure of second cutting-edge structure 1731 is located at magnetic circuit gap 1740, i.e. the second cutting-edge structure 1731 can be with There is part-structure 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 (i.e. the distance between first the first cutting-edge structure 1713 and the last one the first cutting-edge structure 1713) is greater 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 (i.e. the distance between first the second cutting-edge structure 1731 and the last one the second cutting-edge structure 1731) is greater 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 exceed the inside edge of wall body 1712.

Meanwhile producing 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 arranged in projective structure 17121, in 17122 two sides of the first groove 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 magnetite 1720.

Meanwhile producing 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 in marginal texture 1732, in the knot of 1733 two sides of the second groove It is configured to the second cutting-edge structure 1731.

In the concrete realization, after magnetite 120 magnetizes, magnetic field is formed, generates magnetic force, the both ends of magnetite 120 have N (north) Pole, S (south) pole, inside magnetite 120, flux is that from the pole S to the pole N, outside is that from the pole N to the pole S, magnet steel 110 and washer 120 are made For the effect of magnetic conduction, i.e. magnet steel 1710 is led by the first cutting-edge structure 1713, washer 1730 by the second cutting-edge structure 1731 Logical magnetic field.

F=BIL

Two, using the embodiment of the present invention, magnetic circuit simulation, Distribution of Magnetic Field such as Figure 20 institute are carried out to traditional magnetic circuit system Show.

Wherein, the magnetic field of a route (line segment i.e. in magnetic circuit gap shown in Figure 20) is strong in magnetic circuit gap as shown in figure 20 As shown in figure 21, horizontal axis is that (one end of the line segment i.e. in magnetic circuit gap shown in Figure 21 is position for the position of the route in Figure 21 to degree Set 0, the other end is position 4), the longitudinal axis be magnetic field strength.

As shown in figure 21, the value of magnetic field strength decreases in the middle part of the route, and still, the distribution in magnetic field is in addition to being distributed in magnetic In the gap of road, if having exceeded the range in magnetic circuit gap, magnetic field strength slows down, and has widened the distribution of Effective magnetic energy.

The line-of-road movement of voice coil generally in magnetic circuit gap as shown in figure 21, stress can pass through following formula meter It calculates:

F=BIL

In this way, using the tip clustering phenomena of magnetic, at least one direction is provided on the inside of wall body in the embodiment of the present invention First cutting-edge structure of washer, and, at least one second cutting-edge structure towards magnet steel is provided on the outside of washer, to arrive Up to the effect in guidance magnetic field, magnetic field passes through in magnetic conductive media, and for sharp position, caused physical effect can be stronger, i.e., Magnetic field strength can enhance.

Embodiment six

Referring to Figure 22, the sectional view of the loudspeaker of another exemplary embodiment of the invention is shown.

As shown in figure 22, loudspeaker 2200 includes the structures such as vibrational system, magnetic circuit system and support system.

Lead mainly plays silver-colored spring and connect with terminal board.

Vibrational system includes the structures such as vibrating diaphragm 2250, voice coil 2240 and bullet wave.

Magnetic circuit system includes the structures such as magnet steel 2210, magnetite 2220 and washer 2230.

Wherein, magnet steel 2210 has pedestal 2211 and the wall body 2212 above pedestal 2211.

Among the region that magnetite 2220 is located on pedestal 2211, wall body 2212 surrounds.

Among the region that washer 2230 is located on magnetite 2220, wall body 2212 surrounds.

At least one first cutting-edge structure 2213 towards washer 2230 is provided on the inside of wall body 2212, and, in China 2230 outside of department is provided at least one second cutting-edge structure 2231 towards magnet steel 2210.

In one embodiment of the invention, magnetic circuit gap, the first tip knot are formed between washer 2230 and wall body 2212 The topside area of structure 2213 is less than surface area of the wall body 2212 in magnetic circuit gap, and the topside area of the first cutting-edge structure 2213 is small In surface area of the washer 2230 in magnetic circuit gap；

The topside area of second cutting-edge structure 2231 is less than surface area of the washer 2230 in magnetic circuit gap, the second tip knot The topside area of structure 3321 is less than surface area of the wall body 2212 in magnetic circuit gap.

In one embodiment of the invention, magnetic circuit gap, the first tip knot are formed between washer 2230 and wall body 2212 At least partly structure of structure 2213 is located in magnetic circuit gap；

At least partly structure of second cutting-edge structure 2231 is located in magnetic circuit gap.

In one embodiment of the invention, more when the quantity of the first cutting-edge structure 2213 is two or more The distance between a first cutting-edge structure 2213 is greater 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 greater than or equal to the width in magnetic circuit gap.

In one embodiment of the invention, the first cutting-edge structure 2213 and 2231 quantity of the second cutting-edge structure is equal, position It sets opposite.

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 to form the first cutting-edge structure in the structure of the first groove two sides 2213。

In one embodiment of the invention, the marginal texture of washer 2230 exceeds the outer ledge of magnetite 2220；

It is provided with the second groove, in marginal texture to form the second cutting-edge structure in the structure of the second groove two sides 2231。

After magnetite 2220 magnetizes, magnetic field is formed, magnet steel 2210 passes through the by the first cutting-edge structure 2213, washer 2230 Magnetic field is connected in two cutting-edge structures 2231.

Voice coil 2240 draws two leads and is soldered to terminal board, and terminal board and external electric signal are connected, the electric current of variation into Enter voice coil 2240.

When electric current enters voice coil 2240, 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 pushes vibrating diaphragm 2250 to move back and forth, and generates sound.

In embodiments of the present invention, since magnetic circuit system and the application of embodiment five are substantially similar, so the comparison of description Simply, related place illustrates that the embodiment of the present invention is not described in detail herein referring to the part of embodiment five.

Figure 23 is the structural schematic diagram of the mobile terminal of one embodiment of the invention.Specifically, the mobile terminal in Figure 23 2300 can be mobile phone, tablet 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, memory 2320, defeated Enter unit 2330, display unit 2340, processor 2360, voicefrequency circuit 2370, WiFi (WirelessFidelity) module 2380 and power supply 2390.

Wherein, input unit 2330 can be used for receiving the number or character information of user's input, and generate with movement eventually The related signal input of the user setting and function control at end 2300.Specifically, in the embodiment of the present invention, the input unit 2330 may include touch panel 2331.Touch panel 2331, also referred to as touch screen collect the touching of user on it or nearby It touches operation (for example user uses the operations of any suitable object or attachment on touch panel 2331 such as finger, stylus), and Corresponding attachment device is driven according to preset formula.Optionally, touch panel 2331 may include touch detecting apparatus and Two parts of touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch operation bring letter Number, transmit a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into Contact coordinate, then give the processor 2360, and order that processor 2360 is sent can be received and executed.Furthermore, it is possible to Touch panel 2331 is realized using multiple types such as resistance-type, condenser type, infrared ray and surface acoustic waves.In addition to touch panel 2331, input unit 2330 can also include other input equipments 2332, 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, operating stick etc. are more Kind.

Wherein, display unit 2340 can be used for showing information input by user or be supplied to the information and movement of user The various menu interfaces of terminal 2300.Display unit 2340 may include display panel 2341, optionally, using LCD or can have The forms such as machine light emitting diode (OrganicLight-EmittingDiode, OLED) configure display panel 2341.

It should be noted that touch panel 2331 can cover display panel 2341, touch display screen is formed, when the touch display screen After detecting touch operation on it or nearby, processor 2360 is sent to determine the type of touch event, is followed by subsequent 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 common control viewing area.The Application Program Interface viewing area And arrangement mode of the common control viewing area does not limit, can be arranged above and below, left-right situs etc. can distinguish two it is aobvious Show the arrangement mode in area.The Application Program Interface viewing area is displayed for the interface of application program.Each interface can be with The interface elements such as the icon comprising at least one application program and/or widget desktop control.The Application Program Interface viewing area Or the empty interface not comprising any content.This commonly uses control viewing area for showing the higher control of utilization rate, for example, Application icons such as button, interface number, scroll bar, phone directory icon etc. are set.

Wherein processor 2360 is the control centre of mobile terminal 2300, utilizes various interfaces and connection whole mobile phone Various pieces, by running or execute the software program and/or module that are stored in first memory 2321, and call and deposit The data in second memory 2322 are stored up, the various functions and processing data of mobile terminal 2300 are executed, thus eventually to movement 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 loudspeaker, and the loudspeaker includes vibrational system and magnetic circuit System；

The vibrational system includes vibrating diaphragm and voice coil；

The magnetic circuit system includes magnet steel, magnetite and washer；

The magnet steel has pedestal and the wall body above the pedestal；

At least one first cutting-edge structure towards the washer is provided in the wall body；And/or in the washer In be provided at least one second cutting-edge structure towards the magnet steel

Optionally, magnetic circuit gap, the topside area of first cutting-edge structure are formed between the washer and the wall body Less than surface area of the wall body in the magnetic circuit gap, the topside area of first cutting-edge structure is less than the washer and exists Surface area in the magnetic circuit gap；

Magnetic circuit gap is formed between the washer and the wall body, the topside area of second cutting-edge structure is less than described Surface area of the washer in the magnetic circuit gap, the topside area of second cutting-edge structure are less than the wall body in the magnetic circuit Surface area in gap.

Optionally, magnetic circuit gap is formed between the washer and the wall body, first cutting-edge structure is at least partly Structure is located in the magnetic circuit gap, and at least partly structure of second cutting-edge structure is located in the magnetic circuit gap.

Optionally, when the quantity of first cutting-edge structure is two or more, multiple first tip knots The distance between structure is greater than or equal to the width in the magnetic circuit gap；

When the quantity of second cutting-edge structure is two or more, between multiple second cutting-edge structures Distance is greater than or equal to the width in the magnetic circuit gap.

Optionally, the marginal texture of the washer exceeds the outer ledge of the magnetite.

Optionally, the wall body has projective structure in the magnetic circuit gap, and the projective structure exceeds the wall body Inside edge；

First groove is set in the projective structure, the first tip is formed with the structure of sub first groove two sides Structure.

Optionally, the wall body has projective structure in the magnetic circuit gap, and the projective structure exceeds the wall body Inside edge.

Optionally, the marginal texture of the washer exceeds the outer ledge of the magnetite；

It is provided with the second groove, in the marginal texture to be the second tip knot in the structure of second groove two sides Structure.

Optionally, first cutting-edge structure and the second cutting-edge structure quantity is equal, position is opposite.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.

Claims

1. a kind of magnetic circuit system, which is characterized in that the magnetic circuit system includes magnet steel, magnetite and washer；

The magnet steel has pedestal and the wall body above the pedestal；

And/or

At least one second cutting-edge structure towards the magnet steel is provided on the outside of the washer；

Wherein, magnetic circuit gap is formed between the washer and the wall body；

At least partly structure of first cutting-edge structure is located in the magnetic circuit gap；

And/or

At least partly structure of second cutting-edge structure is located in the magnetic circuit gap；

When the quantity of first cutting-edge structure is two or more, the distance between multiple described first cutting-edge structures More than or equal to the width in the magnetic circuit gap；And/or

When the quantity of second cutting-edge structure is two or more, the distance between multiple described second cutting-edge structures More than or equal to the width in the magnetic circuit gap.

2. magnetic circuit system according to claim 1, which is characterized in that the wall body has protrusion in the magnetic circuit gap Structure, the projective structure exceed the inside edge of the wall body；

First groove is set in the projective structure, to form the first cutting-edge structure in first groove two sides.

3. magnetic circuit system according to claim 1, the marginal texture of the washer exceeds the outer ledge of the magnetite；

It is provided with the second groove, in the marginal texture to form the second cutting-edge structure in second groove two sides.

4. magnetic circuit system according to claim 1, which is characterized in that first cutting-edge structure and second tip knot Structure quantity is equal, position is opposite.

5. a kind of loudspeaker, which is characterized in that the loudspeaker includes vibrational system and magnetic circuit system；

The vibrational system includes vibrating diaphragm and voice coil；

The magnetic circuit system includes magnet steel, magnetite and washer；

The magnet steel has pedestal and the wall body above the pedestal；

At least one first cutting-edge structure towards the washer is provided on the inside of the wall body, and/or, outside the washer Side is provided at least one second cutting-edge structure towards the magnet steel；

The two sides of the voice coil are first cutting-edge structure and/or second cutting-edge structure；

Wherein, magnetic circuit gap is formed between the washer and the wall body；

And/or

6. a kind of mobile terminal, which is characterized in that the mobile terminal includes loudspeaker described in claim 5.