CN209234052U - A kind of magnet arrangement for such as magnetic type loudspeaker - Google Patents
A kind of magnet arrangement for such as magnetic type loudspeaker Download PDFInfo
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- CN209234052U CN209234052U CN201821927098.5U CN201821927098U CN209234052U CN 209234052 U CN209234052 U CN 209234052U CN 201821927098 U CN201821927098 U CN 201821927098U CN 209234052 U CN209234052 U CN 209234052U
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Abstract
The utility model relates to a kind of magnet arrangement for such as magnetic type loudspeaker, the vibrating diaphragm on frame is fixed on including edge, and several permanent magnets, the first end on permanent magnet close to vibrating diaphragm is to be parallel to the plane of vibrating diaphragm, and setting corresponding with the coil on vibrating diaphragm；The section configuration of permanent magnet is symmetrical along central axes, the waist including top, bottom and the arc curve section being connected between top and bottom；Bottom is the line segment to intersect vertically with central axes；Top is the line segment to intersect vertically with central axes or a point；On waist the distance of any point to central axes be all not less than on this waist than this closer to top another point to central axes distance；From bottom to top, the distance of point on waist to central axes at least starts to reduce before last 1/5 section of waist.The utility model reduces interference of the wedge-shaped wedge angle to sound on permanent magnet by the section configuration of optimization permanent magnet, improves the sound field of loudspeaker, the space hierarchy for improving loudspeaker and parsing power.
Description
Technical field
The utility model relates to speaker technology field more particularly to a kind of magnet arrangements for such as magnetic type loudspeaker.
Background technique
Electroacoustic loud speaker is classified in a driving manner at present can be roughly divided into such as magnetic type loudspeaker, coil-moving speaker, piezoelectricity
Formula loudspeaker and electrostatic loudspeaker.
Such as magnetic type loudspeaker can be divided into push-pull type and two kinds of monofocal from magnet fractal structure.Such as magnetic type loudspeaker combines
The advantages of both moving-coil speaker and electrostatic loudspeaker, possesses better performance compared to electrostatic loudspeaker in terms of low frequency, and
And also it is better than moving-coil speaker in terms of high frequency.The structure of the energy converter of its core be usually fixed on hollow frame one it is soft
Property thin vibrating diaphragm, (monofocal) or two sides, which are arranged, in the side of vibrating diaphragm is respectively set (push-pull type) magnetic yoke, is fixed in magnetic yoke more
A strip or circular permanent magnet (ndfeb magnet for mostly using trade mark N50 or more), on vibrating diaphragm and permanent magnet pole
The opposed position in face is provided with coil.Coil inside flowing electric current with by permanent magnet generate magnetic field orthotropic, in this way, by
Input AC electric current in coil, coil are to generate the power for deferring to Faraday's law, and vibrating diaphragm is in vertical direction under this force
Upper vibration, the ac current signal are transformed to voice signal.
As push-pull type such as magnetic type loadspeaker structure it is found that permanent magnet blocks the sound wave produced by vibrating diaphragm to listener's always
On direction of transfer, certain decaying will lead to.And the permanent magnet either circular ring shape of existing such as magnetic type loudspeaker is still grown
Bar shaped, section configuration are rectangle.When sound wave reaches at ndfeb magnet, diffraction can be generated in wedge-shaped edge, from
And can be considered a new sound source, and after multiple reflections and diffraction, sound wave is relevant also to generate standing wave, so that raising
The directive property of sound device is deteriorated, spatial information is lost, generates phase error.For the user, specific manifestation can be expressed as
Sound field is chaotic, and space sensory hierarchy and parsing power are deteriorated.
For push-pull type such as magnetic type loudspeaker, although the magnetic speakers such as monofocal vibrating diaphragm between listener to not depositing
In permanent magnet, decaying caused by permanent magnet blocks in sound wave transmittance process, and the diffraction in permanent magnet wedge shape corner are avoided.
But since permanent magnet concentrates on vibrating diaphragm side, either magnetic field strength or uniformity is poorer than push-pull type such as magnetic type loudspeaker
It is more.Especially in terms of magnetic field homogeneity, permanent magnet, which generates magnetic field strength, can increase with distance and decay (be greater than or equal to rapidly
Distance cube inverse ratio), so, when its process far from permanent magnet, suffered power can be fast when vibrating diaphragm vibrates in vertical direction
Speed decaying and cause response speed to be deteriorated, therefore in the market most of such as magnetic type loudspeaker using push-pull type structure.
Summary of the invention
The purpose of this utility model is proposed a kind of for such as magnetic type loudspeaker for the disadvantage on prior art construction
Magnet arrangement, the magnet arrangement optimize the section configuration of permanent magnet, reduce in existing such as magnetic type loudspeaker on permanent magnet
Interference of the wedge-shaped wedge angle to sound.
The utility model embodiment provides a kind of magnet arrangement for such as magnetic type loudspeaker, including edge is fixed on frame
On vibrating diaphragm, vibrating diaphragm thickness is less than 1cm, and at least side of the vibrating diaphragm is equipped with several permanent magnets, and the permanent magnet is close to described
The side of vibrating diaphragm be first end, the other side is second end, the first end be parallel to the plane of vibrating diaphragm, and with vibrating diaphragm coil
It is correspondingly arranged；The contour line of the section configuration of the permanent magnet is by bottom, top and the waist being connected between top and bottom
It constitutes；The waist is arc curve section；The bottom is the line segment that the outer surface of first end is constituted, and the length is 0.5cm-
10m；The top is located on the outer surface of second end, is the line segment or a point parallel with the bottom；From the top
A little to bottom make virtual vertical line section, the length of the virtual vertical line section is 0.5cm-20m；Any point is to institute on the waist
State virtual vertical line section distance be all not less than on this waist than this closer to top another point to central axes distance；And by
To top-direction, the distance of point on the waist to central axes at least starts to contract before last 1/5 section of waist for the bottom
Subtract.
In a preferred embodiment, the shape of the arc curve section is selected from hyperbola, circular arc, elliptic arc, parabola, gradually
Burst at the seams, astroid, epicycloid, hypocycloid, catenary, Ke Laixian, cochleoid, tractrix, conchoid, double folium, helical and it
Between combination.
In a preferred embodiment, the point on the waist is to the distance of central axes at least before last 1/2 section of waist
Start to reduce.
In a preferred embodiment, the two sides of the vibrating diaphragm are equipped with several permanent magnets.
In a preferred embodiment, the permanent magnet is strip, and several permanent magnets positioned at vibrating diaphragm the same side are set side by side
It sets, and first end is generally aligned in the same plane.
In a preferred embodiment, the permanent magnet is circular ring shape, and several permanent magnets of described vibrating diaphragm the same side are successively same
Axle sleeve is set, and first end is generally aligned in the same plane.
In a preferred embodiment, circular arc chamfering is equipped between the waist and bottom.
Compared with prior art, the beneficial effect of the utility model embodiment is: the section shape by optimizing permanent magnet
Shape reduces the wedge-shaped wedge angle in existing such as magnetic type loudspeaker on permanent magnet to sound under the premise of guaranteeing magnetic field strength
Interference effectively improves the sound field of loudspeaker, the space hierarchy for improving loudspeaker and parsing power.
Detailed description of the invention
By the description carried out with reference to the accompanying drawing to its exemplary embodiment, the utility model features described above and advantage will
It can become more fully apparent and be readily appreciated that.
Fig. 1 is a kind of overall structure signal of magnet arrangement for such as magnetic type loudspeaker of the utility model embodiment 1
Figure.
Fig. 2 is that overall structure of the another kind of the utility model embodiment 1 for the magnet arrangement of such as magnetic type loudspeaker is shown
It is intended to.
Fig. 3 is that another overall structure for being used for the magnet arrangement of such as magnetic type loudspeaker of the utility model embodiment 1 is shown
It is intended to.
Fig. 4 is the utility model embodiment permanent magnet section configuration schematic diagram I.
Fig. 5 is the utility model embodiment permanent magnet section configuration schematic diagram II.
Fig. 6 is the utility model embodiment permanent magnet section configuration schematic diagram III.
Fig. 7 is the utility model embodiment permanent magnet section configuration schematic diagram IV.
Fig. 8 is the utility model embodiment permanent magnet section configuration schematic diagram V.
Fig. 9 is the utility model embodiment permanent magnet section configuration schematic diagram VI.
Figure 10 is the utility model embodiment permanent magnet section configuration schematic diagram VII.
Figure 11 is the utility model embodiment permanent magnet section configuration schematic diagram VIII.
Figure 12 is the utility model embodiment permanent magnet section configuration schematic diagram IX.
Figure 13 is the utility model embodiment permanent magnet section configuration schematic diagram X.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing, in order to the understanding of technical staff of the same trade:
Embodiment 1:
Shown in Figure 1, the utility model embodiment provides a kind of such as magnetic type loudspeaker, structure and conventional push-pull formula etc.
Magnetic speaker structure is roughly the same, and including the vibrating diaphragm 1 that all cause frames 2 are fixed, the coil on vibrating diaphragm 1 is electrically connected with signal wire.
Vibrating diaphragm thickness is less than 1cm, and magnetic yoke is respectively configured in 1 two sides of vibrating diaphragm, be fixedly installed in each magnetic yoke it is several be parallel to each other, and be parallel to vibration
Film 1 is arranged bar permanent magnet 3, permanent magnet 3 and the coil on vibrating diaphragm be corresponding be arranged and the size of vibrating diaphragm two sides can be different
Or it is asymmetric.
Since above structure is known to the skilled person technology, therefore coil and strip-shaped permanent-magnet on magnetic yoke, vibrating diaphragm
The relative positional relationship of body 3 and its magnetic circuit and coil is omitted in figure.
Permanent magnet 3 uses strip ndfeb magnet, and there are two magnetic poles for tool.It is wherein practical at this close to the magnetic pole of vibrating diaphragm 1
First end is referred to as in new embodiment, the magnetic pole far from vibrating diaphragm 1 is referred to as second end in the utility model embodiment.First
End is the plane for being parallel to vibrating diaphragm 1, to ensure the magnetic field strength of 1 position of vibrating diaphragm.
It is excellent to the section configuration progress of permanent magnet in the utility model embodiment unlike the magnetic speakers such as conventional
Change, specific as follows to improve its acoustic characteristic:
The contour line of the section configuration of permanent magnet 3 is made of three parts: top 6, bottom 5 and be connected to top 6 and
Two waists 7 between bottom 5.
Bottom 5 is the line segment that the outer surface of first end is constituted.5 length of width, that is, bottom of permanent magnet 3.
Top 6 is located on the outer surface of second end, is the line segment or a point parallel with bottom 5.It should be noted that
It is that top 6 is not necessarily the outer surface of complete second end.
Make virtual vertical line section 8 from any point on the top 6 to bottom 5, which is the thickness of permanent magnet 2.Bottom
Portion 5 is the line segment to intersect vertically with virtual vertical line section 8.
Only consider conversion efficiency, the magnetic field strength that permanent magnet 3 provides is higher, and the efficiency of loudspeaker is higher.Suitable for raising
The ndfeb magnet physical characteristic of sound device is as shown in the table:
As seen from the above table, the trade mark of the used ndfeb magnet of usual loudspeaker is up to N52, according to ndfeb magnet
Performance parameter, applicant has found that under the premise of controlling loudspeaker weight, 3 thickness of permanent magnet is not answered in a large amount of practice
Lower than 0.5cm, otherwise do not simply fail to provide magnetic field strength appropriate, and in process of production it is difficult to ensure that permanent magnet it is complete
Property.Meanwhile it is poor in view of the magnetic conductivity of ndfeb magnet, magnetic field strength decays rapidly with distance, and the thickness of permanent magnet 3 is higher than
It is limited that effect is promoted after 7cm.It is further preferred that under the premise of controlling loudspeaker quality, the width of permanent magnet 3 is preferably
1cm-5m。
The distance of any point to virtual vertical line section 8 is all not less than on this waist 7 than this closer to top on waist 7
Distance of the another point to virtual vertical line section.And from bottom 5 to 6 direction of top, the distance of point on waist 7 to virtual vertical line section is extremely
It is few to start to reduce before 7 last 1/5 sections of waist.
And then there are two kinds of situations in top 6, one is the line segments to intersect vertically with central axes 4；Another kind is to be located at axis
A point on line 4.The distance of top 6 to 1 magnetic pole piece 5 of proximal end is the thickness of permanent magnet 3.
No matter top 6 be point or line segment, waist 7, to what is gradually tapered up between top 6, be specifically exactly in bottom 5:
The distance of 7 any point of waist to central axes 4 is all not less than on this waist 7 than this closer to the another of top 6
Point arrives the distance of central axes 4.And from bottom 5 to top 6, the distance of point on waist 7 to central axes 4 is at least last in waist 7
Start to reduce before 1/5 section.
Under the premise of guaranteeing mentioned above principle:
Waist 7 can be arc curve section, and arc curve section shape is selected from hyperbola, circular arc, elliptic arc, parabola, gradually
Burst at the seams, astroid, epicycloid, hypocycloid, catenary, Ke Laixian, cochleoid, tractrix, conchoid, double folium, helical and it
Between combination.It can be found in Fig. 2 (section configuration is semicircle), Fig. 3 (section configuration is isosceles trapezoid), Fig. 4 (section configuration
For half elliptic), Fig. 5, Fig. 6, Fig. 7, Fig. 9, Figure 10 (waist 7 is parabola).
When selecting such scheme, ndfeb magnet needs to manufacture special mold one-pass molding, its advantage is that: it can guarantee
There is no wedge-shaped wedge angles on waist 7, although sound wave and curved surface still can generate certain diffraction when tangent, the angle of deflection is non-
It is often small, therefore too many spatial information will not be lost because of diffraction, the interference to sound is greatly decreased.The disadvantage is that: due to equimagnetic
Loudspeaker existing market scale is smaller, will lead to loudspeaker cost exclusively for ndfeb magnet die sinking and is substantially improved.
The straightway that waist 7 can also be mutually connected by several segments is constituted (Figure 11), and between any two adjacent straightways
Angle is obtuse angle.When selecting such scheme, although waist 7 still has wedge-shaped wedge angle, (number of segment is higher, folder for angle increase
Angle is bigger), it can equally reduce the interference to sound.And ndfeb magnet may not need die sinking, and utilization is common in the market
Rectangular cross section magnet is completed the process by CNC technique, and cost is relatively low.Referring to Figure 12 (section configuration isosceles triangle), Fig. 8
(section configuration isosceles trapezoid), Fig. 7 (octagon that section configuration is half).
And the reason of at least starting reduction before last 1/5 section of waist is: permanent magnet integral thickness is relatively thin, when needs exist
When reduced domain is arranged in waist, the section is too small to be will lead to it and is still similar to a wedge, for diffraction improvement not
It is good.Applicant by many experiments find, the contraction of waist at least should since at last 1/5, preferably should at least from
Start at 1/2.
Approximate reason is arranged between waist 7 and bottom 5 and intersects vertically in a preferred embodiment (Fig. 7 and Figure 10)
First straight line section 71.In this way be arranged the reason of be: in Fig. 9 and Figure 12, waist 7 from bottom 5 just rapidly to contract, although
Diffraction and reflection of the sound wave at permanent magnet can be improved, improve sound quality.But it should be noted that such case permanent magnet 3
The thickness at edge is also greatly reduced.Corresponding, magnetic field strength declines at this, also deteriorates sound quality to a certain extent.In view of neodymium
The feature of iron boron magnets magnetic conductivity difference, and 3 edge of permanent magnet can guarantee by the minimum dimension range of setting first straight line section 71
And the magnetic field strength at central axes is unlikely to have very big deviation, obtains between magnetic field strength and magnet acoustic characteristic opposite
Balance.
In a further preferred embodiment, waist 7 include first straight line section 71 and arc curve section (not shown), first
Straightway 71 intersects vertically with bottom 5, and arc curve section connects with top 6.Arc curve section shape be selected from hyperbola, circular arc,
It is elliptic arc, parabola, involute, astroid, epicycloid, hypocycloid, catenary, Ke Laixian, cochleoid, tractrix, conchoid, double
Leaf line, helical and the combination between them, are not shown.
Embodiment 2:
Shown in Figure 13, the present embodiment 2 is as embodiment 1, and the contour line of section configuration is equally by bottom 5, top
Portion 6 and the waist 7 being connected between top 5 and bottom 6 are constituted.Bottom 5 is the line segment that the outer surface of first end is constituted.Top
6 are located on the outer surface of second end, are the line segment or a point parallel with the bottom.From any point on the top 6 bottom of to
Portion 5 makees virtual vertical line section, which is the thickness of permanent magnet 2.
The distance of any point to virtual vertical line section is all not less than on this waist 7 than this closer to top on waist 7
Distance of the another point to virtual vertical line section.And from bottom 5 to 6 direction of top, the distance of point on waist 7 to virtual vertical line section is extremely
It is few to start to reduce before 7 last 1/5 sections of waist.
In other words, the difference of the present embodiment and embodiment 1 is only in that using asymmetrical structure；The bottom is
The line segment that the outer surface of first end is constituted, the length is 1cm-10m；The top is located on the outer surface of second end, is
The line segment parallel with the bottom or a point；Make virtual vertical line section from any point on the top to bottom, the virtual vertical line section
Length be 1cm-7m；The distance of any point to the virtual vertical line section is all not less than on this waist than the point on the waist
Closer to top another point to central axes distance；And from the bottom to top-direction, point on the waist to axis
The distance of line at least starts to reduce before last 1/5 section of waist.The structure of the magnetic speakers such as monofocal.Permanent magnetism is optimized simultaneously
The section configuration of iron 3.
It is described in detail above by invention intention and embodiment of the embodiment for the utility model, but this reality
It is appreciated that the utility model above embodiments are only the preferred of the utility model with novel one of ordinary skill in the art
One of embodiment limits for length, cannot enumerate all embodiments one by one here, any to embody the utility model right
It is required that the implementation of technical solution, all within the protection scope of the present utility model.
It should be noted that the above content is combination specific embodiments to further detailed made by the utility model
Illustrate, and it cannot be said that specific embodiment of the present utility model is only limitted to this, under the guidance of above-described embodiment, art technology
Personnel can carry out various improvement and deformations on the basis of the above embodiments, and these are improved or deformation to fall in this practical new
In the protection scope of type.
Claims (5)
1. a kind of magnet arrangement for such as magnetic type loudspeaker is fixed on the vibrating diaphragm on frame including edge, vibrating diaphragm thickness is less than
1cm, at least side of the vibrating diaphragm are equipped with several permanent magnets, and the width of permanent magnet is 1cm-5m；The permanent magnet is described in
The side of vibrating diaphragm be first end, the other side is second end, the first end be parallel to the plane of vibrating diaphragm, and with vibrating diaphragm coil
It is correspondingly arranged；It is characterized by: the contour line of the section configuration of the permanent magnet is by bottom, top and is connected to top and bottom
Between waist constitute；The waist is arc curve section；
The bottom is the line segment that the outer surface of first end is constituted, and the length is 0.5cm-10m；
The top is located on the outer surface of second end, is the line segment or a point parallel with the bottom；From the top
A little to bottom make virtual vertical line section, the length of the virtual vertical line section is 0.5cm-20m；
The distance of any point to the virtual vertical line section is all not less than on this waist than the point closer to top on the waist
Another point to central axes distance；
And from the bottom to top-direction, the distance of point on the waist to central axes at least last 1/5 section of waist it
Before start to reduce；The shape of the arc curve section is selected from hyperbola, circular arc, elliptic arc, parabola, involute, astroid, outer
Cycloid, hypocycloid, catenary, Ke Laixian, cochleoid, tractrix, conchoid, double folium, helical and the combination between them.
2. the magnet arrangement according to claim 1 for such as magnetic type loudspeaker, it is characterised in that: the point on the waist
Distance to central axes at least starts to reduce before last 1/2 section of waist.
3. the magnet arrangement according to claim 1 for such as magnetic type loudspeaker, it is characterised in that: the two sides of the vibrating diaphragm
It is equipped with several permanent magnets.
4. the magnet arrangement according to claim 1 for such as magnetic type loudspeaker, it is characterised in that: the permanent magnet is length
Bar shaped, several permanent magnets positioned at vibrating diaphragm the same side are set side by side, and first end is generally aligned in the same plane.
5. the magnet arrangement according to claim 1 for such as magnetic type loudspeaker, it is characterised in that: the waist and bottom
Between be equipped with circular arc chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821927098.5U CN209234052U (en) | 2018-11-22 | 2018-11-22 | A kind of magnet arrangement for such as magnetic type loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821927098.5U CN209234052U (en) | 2018-11-22 | 2018-11-22 | A kind of magnet arrangement for such as magnetic type loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209234052U true CN209234052U (en) | 2019-08-09 |
Family
ID=67503935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821927098.5U Active CN209234052U (en) | 2018-11-22 | 2018-11-22 | A kind of magnet arrangement for such as magnetic type loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209234052U (en) |
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2018
- 2018-11-22 CN CN201821927098.5U patent/CN209234052U/en active Active
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Legal Events
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190821 Address after: 215316 North Building, 1339 Shuixiu Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province, 2nd Floor Patentee after: HEAD-DIRECT (KUNSHAN) Co.,Ltd. Address before: Block B-824, No. 5 Lanyuan Road, Huayuan Industrial Park, Tianjin Binhai New Area, 300450 Patentee before: HIFIMAN (TIANJIN) TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: No. 2001, Yingbin West Road, Bacheng Town, Kunshan City, Suzhou City, Jiangsu Province, 215311 Patentee after: Kunshan Haifeiman Technology Group Co.,Ltd. Address before: 2 / F, North building, 1339 Shuixiu Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: HEAD-DIRECT (KUNSHAN) Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215300 No. 2001 Yingbin West Road, Bacheng Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Kunshan Haifeiman Technology Group Co.,Ltd. Address before: No. 2001, Yingbin West Road, Bacheng Town, Kunshan City, Suzhou City, Jiangsu Province, 215311 Patentee before: Kunshan Haifeiman Technology Group Co.,Ltd. |
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| CP03 | Change of name, title or address |