CN207369295U - A kind of magnetic pole type magnetic circuit - Google Patents
A kind of magnetic pole type magnetic circuit Download PDFInfo
- Publication number
- CN207369295U CN207369295U CN201721254535.7U CN201721254535U CN207369295U CN 207369295 U CN207369295 U CN 207369295U CN 201721254535 U CN201721254535 U CN 201721254535U CN 207369295 U CN207369295 U CN 207369295U
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- China
- Prior art keywords
- magnetic
- iron
- magnet steel
- board
- hollow core
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of magnetic pole type magnetic circuit, including T iron, magnet steel and upper conduction magnetic board, the upper conduction magnetic board and T iron is individually fixed in the upper and lower of the magnet steel, the T iron is the integrative-structure being made of hollow core limb and lower magnetic conductive board two parts, some cylindrical holes are provided with the hollow core limb, neodymium iron boron magnetic pole is both provided with each cylindrical hole.A kind of magnetic pole type magnetic circuit provided by the utility model, it is rational in infrastructure, by setting neodymium iron boron magnetic pole in the hollow core limb of T iron, two magnetic route structure is made, the problem of using Nd-Fe-B magnet steel cost too high at present is improved, magnetic property can be improved, help to lift loudspeaker parameters, also ensure that voice coil loudspeaker voice coil is always maintained at vacant state in high-speed cruising, without contacting T iron axial wall, substantially prolongs the service life of voice coil loudspeaker voice coil.
Description
【Technical field】
The technical field of loudspeaker is the utility model is related to, more particularly to a kind of magnetic pole type magnetic circuit.
【Background technology】
Loudspeaker is also known as " loudspeaker ", is a kind of very common electro-acoustic transducer device, in the electronic electric equipment of sounding
It can be seen.Loudspeaker has numerous species, but its basic operation principle is similar, is that one kind converts electrical signals to
The element that voice signal is reset.At present, the most widely used is dynamic speaker, it is by vibrating membrane, voice coil loudspeaker voice coil, permanent
Magnet, stent etc. form.After the voice coil loudspeaker voice coil of loudspeaker is passed through tone currents, voice coil loudspeaker voice coil just produces the magnetic of alternation under the action of electric current
, permanent magnet also produces the constant constant magnetic field of a size and Orientation at the same time.It is big due to magnetic field caused by voice coil loudspeaker voice coil
Small and direction is constantly changing with the change of tone currents, and the interaction in two such magnetic field makes voice coil loudspeaker voice coil make perpendicular to voice coil loudspeaker voice coil
The movement of middle current direction, since voice coil loudspeaker voice coil is connected with vibrating membrane, so as to drive vibrating membrane to produce vibration, is caused by vibrating membrane vibration
The vibration of air and make a sound.When the electric current of input voice coil loudspeaker voice coil is bigger, the active force in its magnetic field is bigger, the width of vibrating membrane vibration
Degree is also bigger, and sound is then louder.Find in use, cannot very well be lifted and raised one's voice as permanent magnet using ferrite magnetic steel
The performance of device, but it is all too high using Nd-Fe-B magnet steel as permanent magnet cost, and voice coil loudspeaker voice coil is transported at a high speed in high temperature and up and down
The chaotic touching T iron axial wall of magnetic loop can be caused in row, damages voice coil loudspeaker voice coil, the service life of voice coil loudspeaker voice coil is shorter, in order to solve problem above,
Speaker performance is lifted, ensures that cost will not be too high, while extend the service life of voice coil loudspeaker voice coil, it is necessary to propose a kind of magnetic pole type magnetic
Road.
【Utility model content】
The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of magnetic pole type magnetic circuit, it is intended to
The performance for using ferrite magnetic steel to lift loudspeaker very well as permanent magnet in the prior art is solved, but is all used
Nd-Fe-B magnet steel is too high as permanent magnet cost, the shorter technical problem of the service life of voice coil loudspeaker voice coil.
To achieve the above object, the utility model proposes a kind of magnetic pole type magnetic circuit, including T iron, magnet steel and upper conduction magnetic board,
The upper conduction magnetic board and T iron is individually fixed in the upper and lower of the magnet steel, and the T iron is by hollow core limb and lower magnetic conduction
The integrative-structure that plate two parts are formed, is provided with some cylindrical holes on the hollow core limb, is respectively provided with each cylindrical hole
There is neodymium iron boron magnetic pole.
Preferably, some cylindrical holes are uniformly distributed using hollow core limb as axle center with identical radius, it is described
Cylindrical hole be upper end opening, the structure of lower end closure.
Preferably, the quantity of the cylindrical hole is 6.
Preferably, the magnet steel is circular column construction, the centre of the upper conduction magnetic board is provided with a circular hole, institute
The magnet steel stated is set on the hollow core limb of the T iron, and hollow core limb upper end is pierced into the circular hole of upper conduction magnetic board, described
Hollow core limb upper surface highly higher than upper conduction magnetic board upper surface height, the T iron, magnet steel and three coaxially pacify
Dress.
Preferably, the outside diameter of the upper conduction magnetic board is identical with the outside diameter of lower magnetic conductive board, and it is straight less than the outer ring of magnet steel
Footpath, the inner ring diameter of the magnet steel>The circular hole aperture of upper conduction magnetic board>The outside diameter of hollow core limb, the upper conduction magnetic board
An annular magnetic gap for placing voice coil loudspeaker voice coil is formed between the inner ring and hollow core limb of circular hole and magnet steel.
Preferably, the hollow core limb is connected with the center of lower magnetic conductive board, and the center among hollow core limb
Magnetic conductive board under the perforation entirely of hole.
The beneficial effects of the utility model：Compared with prior art, a kind of magnetic pole type magnetic circuit provided by the utility model, knot
Structure is reasonable, by setting neodymium iron boron magnetic pole in the hollow core limb of T iron, makes two magnetic route structure, improves and adopt at present
With Nd-Fe-B magnet steel cost it is too high the problem of, magnetic property can be improved, contribute to lifted loudspeaker parameters, moreover it is possible to ensure that voice coil loudspeaker voice coil exists
High-speed cruising is always maintained at vacant state, without contacting T iron axial wall, substantially prolongs the service life of voice coil loudspeaker voice coil.
The feature and advantage of the utility model will be described in detail by embodiment combination attached drawing.
【Brief description of the drawings】
Fig. 1 is a kind of main view semi-cutaway of magnetic pole type magnetic circuit of the utility model embodiment；
Fig. 2 is a kind of top view of magnetic pole type magnetic circuit of the utility model embodiment.
In figure：Magnetic conductive board, 13- cylindrical holes, 2- magnet steel, 3- upper conduction magnetic boards, 31- under the hollow core limb of 1-T iron, 11-, 12-
Circular hole, 4- neodymium iron borons magnetic pole, 5- annular magnetic gaps.
【Embodiment】
To make the objectives, technical solutions and advantages of the present invention clearer, below by accompanying drawings and embodiments,
The utility model is further elaborated.However, it should be understood that specific embodiment described herein is only solving
The utility model is released, the scope being not intended to limit the present invention.In addition, in the following description, eliminate to known features
With the description of technology, to avoid the concept of the utility model is unnecessarily obscured.
Refering to Fig. 1 and Fig. 2, the utility model embodiment provides a kind of magnetic pole type magnetic circuit, including T iron 1, magnet steel 2 and on lead
Magnetic sheet 3, the upper conduction magnetic board 3 and T iron 1 are individually fixed in the upper and lower of the magnet steel 2, and the T iron 1 is by hollow iron core
The integrative-structure that column 11 and lower 12 two parts of magnetic conductive board are formed, is provided with some cylindrical holes 13 on the hollow core limb 11,
Neodymium iron boron magnetic pole 4 is both provided with each cylindrical hole 13.
Wherein, some cylindrical holes 13 are axle center with hollow core limb 11, are uniformly distributed with identical radius, described
Cylindrical hole 13 be upper end opening, the structure of lower end closure.
In the utility model embodiment, the quantity of cylindrical hole 13 is 6.
Further, the magnet steel 2 is circular column construction, and the centre of the upper conduction magnetic board 3 is provided with a circular hole
31, the magnet steel 2 is set on the hollow core limb 11 of the T iron 1, and upper conduction magnetic board 3 is pierced into 11 upper end of hollow core limb
Circular hole 31 in, the upper surface of the hollow core limb 11 is highly higher than the upper surface height of upper conduction magnetic board 3, the T iron
1st, magnet steel 2 and three are co-axially mounted, and the outside diameter of the upper conduction magnetic board 3 is identical with the outside diameter of lower magnetic conductive board 12, and are less than magnet steel 2
Race diameter, the inner ring diameter of the magnet steel 2>31 aperture of circular hole of upper conduction magnetic board 3>The outside diameter of hollow core limb 11, institute
An annular magnetic gap for placing voice coil loudspeaker voice coil is formed between the circular hole 31 for the upper conduction magnetic board 3 stated and the inner ring of magnet steel 2 and hollow core limb 11
5。
Further, the hollow core limb 11 is connected with the center of lower magnetic conductive board 12, and among hollow core limb 11
The whole lower magnetic conductive board 12 of centre bore perforation.
A kind of magnetic pole type magnetic circuit of the utility model, it is rational in infrastructure, by setting neodymium iron in the hollow core limb 11 of T iron 1
Boron magnetic pole 4, makes two magnetic route structure, improves the problem of using Nd-Fe-B magnet steel cost too high at present, can improve magnetic
Performance, helps to lift loudspeaker parameters, moreover it is possible to ensures that voice coil loudspeaker voice coil is always maintained at vacant state in high-speed cruising, without contacting T iron 1
Axial wall, substantially prolongs the service life of voice coil loudspeaker voice coil.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Any modification, equivalent substitution or improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
1. a kind of magnetic pole type magnetic circuit, including T iron (1), magnet steel (2) and upper conduction magnetic board (3), the upper conduction magnetic board (3) and T iron
(1) it is individually fixed in the upper and lower of the magnet steel (2), it is characterised in that：The T iron (1) be by hollow core limb (11) and
The integrative-structure that lower magnetic conductive board (12) two parts are formed, is provided with some cylindrical holes (13) on the hollow core limb (11),
Neodymium iron boron magnetic pole (4) is both provided with each cylindrical hole (13).
A kind of 2. magnetic pole type magnetic circuit as claimed in claim 1, it is characterised in that：Some cylindrical holes (13) are with cored iron
Stem (11) is axle center, is uniformly distributed with identical radius, and the cylindrical hole (13) is upper end opening, the knot of lower end closure
Structure.
A kind of 3. magnetic pole type magnetic circuit as described in 1 and 2 any one of claim, it is characterised in that：The cylindrical hole (13)
Quantity be 6.
A kind of 4. magnetic pole type magnetic circuit as claimed in claim 1, it is characterised in that：The magnet steel (2) is circular cylindricality knot
Structure, the centre of the upper conduction magnetic board (3) are provided with a circular hole (31), and the magnet steel (2) is set in the hollow of the T iron (1)
On core limb (11), and hollow core limb (11) upper end is pierced into the circular hole (31) of upper conduction magnetic board (3), the hollow core limb
(11) highly higher than the upper surface height of upper conduction magnetic board (3), the T iron (1), magnet steel (2) and three coaxially pacify for upper surface
Dress.
A kind of 5. magnetic pole type magnetic circuit as claimed in claim 4, it is characterised in that：The outside diameter of the upper conduction magnetic board (3) is with
The outside diameter of magnetic conductive board (12) is identical, and less than the race diameter of magnet steel (2), the inner ring diameter of the magnet steel (2)>Upper conduction magnetic board
(3) circular hole (31) aperture>The outside diameter of hollow core limb (11), the circular hole (31) of the upper conduction magnetic board (3) and magnet steel (2)
An annular magnetic gap (5) for placing voice coil loudspeaker voice coil is formed between inner ring and hollow core limb (11).
A kind of 6. magnetic pole type magnetic circuit as claimed in claim 1, it is characterised in that：The hollow core limb (11) and lower magnetic conduction
The center connection of plate (12), and magnetic conductive board (12) under the centre bore perforation entirely among hollow core limb (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721254535.7U CN207369295U (en) | 2017-09-27 | 2017-09-27 | A kind of magnetic pole type magnetic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721254535.7U CN207369295U (en) | 2017-09-27 | 2017-09-27 | A kind of magnetic pole type magnetic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207369295U true CN207369295U (en) | 2018-05-15 |
Family
ID=62350254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721254535.7U Expired - Fee Related CN207369295U (en) | 2017-09-27 | 2017-09-27 | A kind of magnetic pole type magnetic circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207369295U (en) |
-
2017
- 2017-09-27 CN CN201721254535.7U patent/CN207369295U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180515 Termination date: 20200927 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |