CN105163249A - Loudspeaker - Google Patents
Loudspeaker Download PDFInfo
- Publication number
- CN105163249A CN105163249A CN201510613323.2A CN201510613323A CN105163249A CN 105163249 A CN105163249 A CN 105163249A CN 201510613323 A CN201510613323 A CN 201510613323A CN 105163249 A CN105163249 A CN 105163249A
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- voice coil
- magnetic conductive
- air
- guide cylinder
- core column
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Abstract
The invention discloses a loudspeaker. The loudspeaker comprises cone stands, a cone, a first concentrating flux plate, a second concentrating flux plate, a driving magnet, a magnetic conduction stem, voice coils and a voice coil guide sleeve, wherein one end of the magnetic conduction stem is fixed to the first concentrating flux plate; and the inner wall of the voice coil guide sleeve, the lower end face of the magnetic conduction stem and the upper end face of the cone are encircled into an air cavity. The loudspeaker is characterized in that an air inlet channel and an air outlet channel are formed in the magnetic conduction stem; the upper ends of the air inlet channel and the air outlet channel pass through the first concentrating flux plate; an air inlet one-way valve which is only used for sucking external air into the air cavity is arranged in the air inlet channel; an air outlet one-way valve which is only used for discharging the air in the air cavity is arranged in the air outlet channel; and a lubricating mechanism is arranged between the magnetic conduction stem and the voice coil guide sleeve. According to the loudspeaker provided by the invention, the amount of heat energy produced by friction in vibration and sound production processes of the voice coils is small, and a good heat dissipation effect is achieved, so that the continuous working time of the loudspeaker is prolonged, and the service life of the loudspeaker is prolonged.
Description
Technical field
The present invention relates to the technical field of electro-acoustic transducer device, specifically a kind of loud speaker.
Background technology
Coil-moving speaker is also called dynamic speaker.Its operation principle is according to Faraday's law, and when current－carrying conductor is by magnetic field, can be subject to an electric power, its direction meets not carrys out bright left hand rule, and power and electric current, magnetic direction are orthogonal, and stressed size is directly proportional to electric current, conductor length, magnetic flux density.When voice coil loudspeaker voice coil input alternation tone currents, voice coil loudspeaker voice coil is subject to alternation motive force and produces alternate motion, drives cone vibration, repeatedly promotes air and sounding.
As can be seen here, in speaker operation process, voice coil loudspeaker voice coil is at oscillation exchange, therefore the friction between voice coil loudspeaker voice coil and air and the friction between voice coil loudspeaker voice coil and drive magnet all can produce certain heat, if the heat of above-mentioned generation can not be discharged in time, drive magnet will be made to produce thermal reunite effect, finally cause the magnetic property of drive magnet to reduce or demagnetization completely.Especially in powerful loud speaker, the amplitude of its voice coil loudspeaker voice coil and vibration frequency are all higher, therefore its speed producing heat energy is far longer than the speed of loud speaker heat radiation, this also just constrains the time of the continuous operation of supersound projector, and operating personnel for the consideration of instructions for use the above-mentioned existing supersound projector of long-continued use, the magnetic property of drive magnet will be caused to decay, thereby reduce the useful life of loud speaker.This namely in prior art supersound projector long-term use continuously after hold flimsy problem place.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of loud speaker, and in its voice coil vibrations voiced process, fricative heat energy is few, good heat dissipation effect, thus improves the time of loud speaker continuous operation, and the useful life of loud speaker.
The technical solution used in the present invention is: provide a kind of loud speaker, it comprises frame, cone, first magnetic conductive board, second magnetic conductive board, drive magnet, magnetic conductive core column, voice coil loudspeaker voice coil and voice coil loudspeaker voice coil guide cylinder, described drive magnet is clamped between the first magnetic conductive board and the second magnetic conductive board, the osculum end of the second magnetic conductive board and frame is fixed, voice coil loudspeaker voice coil is wound in outside voice coil loudspeaker voice coil guide cylinder, and be placed in the centre bore of drive magnet with voice coil loudspeaker voice coil guide cylinder, one end of voice coil loudspeaker voice coil guide cylinder and one end of cone are fixed, cone is set up in frame, and the outer rim of the other end of cone and the big opening end of frame are fixed, one end and first magnetic conductive board of magnetic conductive core column are fixed, the other end of magnetic conductive core column inserts in the central through hole of voice coil loudspeaker voice coil guide cylinder, magnetic conductive core column and voice coil loudspeaker voice coil guide cylinder are slidably matched, the inwall of described voice coil loudspeaker voice coil guide cylinder, formation one air cavity is surrounded in the lower surface of magnetic conductive core column and the upper surface of cone, it is characterized in that: in magnetic conductive core column, be provided with the air intake passage for being communicated with air cavity and extraneous air and air-out passage, the first magnetic conductive board is run through in the upper end of air intake passage and air-out passage, the breather check valve only supplying air intake air cavity is provided with in described air intake passage, be provided with only for the outgassing nonreturn valve that the air in air cavity is discharged in air-out passage, the lubricating structure of frictional force between lateral wall for reducing magnetic conductive core column and voice coil loudspeaker voice coil guide cylinder madial wall is provided with between described magnetic conductive core column and voice coil loudspeaker voice coil guide cylinder.By with the inlet channel of unidirectional valve and outlet passageway, in magnetic conductive core column's double vibrations process relative to voice coil loudspeaker voice coil guide cylinder, the change of air cavity internal gas pressure can be relied on, constantly realizes air inlet and exhaust, carry out air-cooled to magnetic conductive core column.In addition, effectively can reduce the friction between voice coil loudspeaker voice coil guide cylinder and magnetic conductive core column by lubricating structure, thus reduce the generation of heat, reach the object extending drive magnet useful life.
Described lubricating structure comprises inner annular plate and is placed on the annular outer plate outside inner annular plate, inner annular plate and magnetic conductive core column's tight fit, annular outer plate and voice coil loudspeaker voice coil guide cylinder tight fit, between described inner annular plate upper end and the upper end of annular outer plate, and connect respectively by an elastic membrane between inner annular plate lower end and the lower end of annular outer plate, and inner annular plate, annular outer plate and elastic membrane surround the annular cavity that formation one seals, in annular cavity, enclose lubricating fluid.Can also well prevent lubricating fluid from revealing while reaching good lubricant effect, can well prevent again dust from entering between voice coil loudspeaker voice coil guide cylinder and magnetic conductive core column.Effectively can reduce the friction between voice coil loudspeaker voice coil guide cylinder and magnetic conductive core column by lubricating structure, thus reduce the generation of heat, reach the object extending drive magnet useful life.
Described inner annular plate, annular outer plate and elastic membrane are same quality of rubber materials and make.Made by quality of rubber materials, the tight fit that can be conducive to inner annular plate and annular outer plate is installed.Namely can be loaded by extruding.Thus the dimension precision requirement reduced for inner annular plate and annular outer plate, decrease processing cost.
Anti-slop serrations is provided with all separately on the lateral wall of described magnetic conductive core column and on the madial wall of voice coil loudspeaker voice coil guide cylinder.The high pressure of lubricating fluid orders about inner annular plate and annular outer plate is pressed on each self-corresponding sidewall, and can well prevent the sidewall relative sliding of the sidewall relative sliding of inner annular plate and magnetic conductive core column, annular outer plate and voice coil loudspeaker voice coil guide cylinder by anti-slop serrations.
Described inner annular plate, annular outer plate and elastic membrane are integral type structure.
Described elastic membrane is provided with the valve cock for injecting or discharge lubricating fluid.
Described air-out passage is four, and four air-out passages are uniformly distributed along the circumference of magnetic conductive core column's axis.
After adopting above structure, a kind of loud speaker of the present invention compared with prior art has the following advantages: first, by inlet channel and outlet passageway, the air pressure change that voice coil vibrations process produces can be utilized, automatically air-cooled circulation is realized, reach the object of cooling magnetic conductive core column, loud speaker bulk temperature is finally made to decline, protect wherein magnetic part, secondly, by the lubrication of annular cavity and lubricating fluid, the frictional force between voice coil loudspeaker voice coil and magnetic conductive core column can be made little, therefore fricative heat can effectively be reduced, thus avoid heat to produce demagnetization impact for the magnetic property of magnetic conductive core column and drive magnet, finally, lubricating fluid is sealing in airtight annular cavity, therefore without the need to adding lubricating fluid, and avoid lubricating fluid to drop to cone pollutes the situation of cone to occur.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of loud speaker of the present invention.
Fig. 2 is the close-up schematic view in " A " region in Fig. 1.
Wherein, 1, frame, 1.1, osculum end, 1.2, big opening end, 2, cone, the 3, first magnetic conductive board, the 4, second magnetic conductive board, 5, drive magnet, 5.1, centre bore, 6, magnetic conductive core column, 7, voice coil loudspeaker voice coil, 8, voice coil loudspeaker voice coil guide cylinder, 9, inner annular plate, 10, annular outer plate, 11, elastic membrane, 12, anti-slop serrations, 13, valve cock, 14, air cavity, 15, air intake passage, 16, air-out passage, 17, breather check valve, 18, outgassing nonreturn valve.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
The invention provides a kind of loud speaker, it comprises frame 1, cone 2, first magnetic conductive board 3, second magnetic conductive board 4, drive magnet 5, magnetic conductive core column 6, voice coil loudspeaker voice coil 7 and voice coil loudspeaker voice coil guide cylinder 8, described drive magnet 5 is clamped between the first magnetic conductive board 3 and the second magnetic conductive board 4, second magnetic conductive board 4 is fixed with the osculum end 1.1 of frame 1, voice coil loudspeaker voice coil 7 is wound in outside voice coil loudspeaker voice coil guide cylinder 8, and be placed in the centre bore 5.1 of drive magnet 5 with voice coil loudspeaker voice coil guide cylinder 8, one end of voice coil loudspeaker voice coil guide cylinder 8 and one end of cone 2 are fixed, cone 2 is set up in frame 1, and the big opening end 1.2 of the outer rim of the other end of cone 2 and frame 1 is fixed, one end and first magnetic conductive board 3 of magnetic conductive core column 6 are fixed, the other end of magnetic conductive core column 6 inserts in the central through hole of voice coil loudspeaker voice coil guide cylinder 8, magnetic conductive core column 6 and voice coil loudspeaker voice coil guide cylinder 8 are slidably matched, the inwall of described voice coil loudspeaker voice coil guide cylinder 8, formation one air cavity 14 is surrounded in the lower surface of magnetic conductive core column 6 and the upper surface of cone 2, it is characterized in that: in magnetic conductive core column 6, be provided with the air intake passage 15 for being communicated with air cavity 14 and extraneous air and air-out passage 16, the first magnetic conductive board 3 is run through in the upper end of air intake passage 15 and air-out passage 16, the breather check valve 17 only sucking air cavity 14 for extraneous air is provided with in described air intake passage 15, be provided with only for the outgassing nonreturn valve 18 that the air in air cavity 14 is discharged in air-out passage 16, the lubricating structure of frictional force between lateral wall for reducing magnetic conductive core column 6 and voice coil loudspeaker voice coil guide cylinder 8 madial wall is provided with between described magnetic conductive core column 6 and voice coil loudspeaker voice coil guide cylinder 8.
The annular outer plate 10 that described lubricating structure comprises inner annular plate 9 and is placed on outside inner annular plate 9, inner annular plate 9 and magnetic conductive core column 6 tight fit, annular outer plate 10 and voice coil loudspeaker voice coil guide cylinder 8 tight fit, between described inner annular plate 9 upper end and the upper end of annular outer plate 10, and connect respectively by an elastic membrane 11 between the lower end of inner annular plate 9 lower end and annular outer plate 10, and inner annular plate 9, annular outer plate 10 and elastic membrane 11 surround the annular cavity that formation one seals, in annular cavity, enclose lubricating fluid.
Described inner annular plate 9, annular outer plate 10 and elastic membrane 11 are same quality of rubber materials and make.
Anti-slop serrations 12 is provided with all separately on the lateral wall of described magnetic conductive core column 6 and on the madial wall of voice coil loudspeaker voice coil guide cylinder 8.
Described inner annular plate 9, annular outer plate 10 and elastic membrane 11 is integral type structure.
Described elastic membrane 11 is provided with the valve cock 13 for injecting or discharge lubricating fluid.
Described air-out passage 16 is four, and four air-out passages 16 are uniformly distributed along the circumference of magnetic conductive core column 6 axis.
Described frame 1 is horn-like structure, and its osculum end 1.1 is the upper end in accompanying drawing, and big opening end 1.2 is the lower end in accompanying drawing.
Inner annular plate 9, annular outer plate 10 and elastic membrane 11 are integral type structure, refer to inner annular plate 9, annular outer plate 10 and elastic membrane 11 three be same material make etc. the monolithic film membrane structure of wall thickness, when loading between magnetic conductive core column 6 and voice coil loudspeaker voice coil guide cylinder 8, the part being close to magnetic conductive core column 6 is inner annular plate 9, the part being close to voice coil loudspeaker voice coil guide cylinder 8 is annular outer plate 10, therebetween transition portion is elastic membrane 11, but three is entirety, therefore in magnetic conductive core column 6 and voice coil loudspeaker voice coil guide cylinder 8 relative sliding process, inner annular plate 9, annular outer plate 10 and elastic membrane 11 three are constantly rollings.That is, the position, arbitrfary point in inner annular plate 9, when moving along with magnetic conductive core column 6, it can be that rolling to put in elastic membrane 11, becomes a part for elastic membrane 11, rolls further to annular outer plate 10, become a part for annular outer plate 10.Therefore, inner annular plate 9, annular outer plate 10 and elastic membrane 11 refer to, node at any time, and the part being close to magnetic conductive core column 6 is inner annular plate 9, and the part being close to voice coil loudspeaker voice coil guide cylinder 8 is annular outer plate 10, and transition portion is elastic membrane 11 therebetween.
Just preferred embodiment of the present invention is described above, but can not be interpreted as it is limitations on claims.The present invention is not only confined to above embodiment, and its concrete structure allows to change, and all various changes done in the protection range of demand for independence of the present invention are all in protection scope of the present invention.
Claims (7)
1. a loud speaker, it comprises frame (1), cone (2), first magnetic conductive board (3), second magnetic conductive board (4), drive magnet (5), magnetic conductive core column (6), voice coil loudspeaker voice coil (7) and voice coil loudspeaker voice coil guide cylinder (8), described drive magnet (5) is clamped between the first magnetic conductive board (3) and the second magnetic conductive board (4), second magnetic conductive board (4) is fixed with the osculum end (1.1) of frame (1), voice coil loudspeaker voice coil (7) is wound in voice coil loudspeaker voice coil guide cylinder (8) outward, and be placed in the centre bore (5.1) of drive magnet (5) with voice coil loudspeaker voice coil guide cylinder (8), one end of voice coil loudspeaker voice coil guide cylinder (8) and one end of cone (2) are fixed, cone (2) is set up in frame (1), and the big opening end (1.2) of the outer rim of the other end of cone (2) and frame (1) is fixed, one end of magnetic conductive core column (6) and the first magnetic conductive board (3) are fixed, the other end of magnetic conductive core column (6) inserts in the central through hole of voice coil loudspeaker voice coil guide cylinder (8), magnetic conductive core column (6) and voice coil loudspeaker voice coil guide cylinder (8) are slidably matched, the inwall of described voice coil loudspeaker voice coil guide cylinder (8), formation one air cavity (14) is surrounded in the lower surface of magnetic conductive core column (6) and the upper surface of cone (2), it is characterized in that: in magnetic conductive core column (6), be provided with the air intake passage (15) for being communicated with air cavity (14) and extraneous air and air-out passage (16), the first magnetic conductive board (3) is run through in the upper end of air intake passage (15) and air-out passage (16), the breather check valve (17) only sucking air cavity (14) for extraneous air is provided with in described air intake passage (15), the outgassing nonreturn valve (18) only supplying the air in air cavity (14) to discharge is provided with in air-out passage (16), the lubricating structure of frictional force between lateral wall for reducing magnetic conductive core column (6) and voice coil loudspeaker voice coil guide cylinder (8) madial wall is provided with between described magnetic conductive core column (6) and voice coil loudspeaker voice coil guide cylinder (8).
2. a kind of loud speaker according to claim 1, it is characterized in that: described lubricating structure comprises inner annular plate (9) and is placed on inner annular plate (9) annular outer plate outward (10), inner annular plate (9) and magnetic conductive core column (6) tight fit, annular outer plate (10) and voice coil loudspeaker voice coil guide cylinder (8) tight fit, between the upper end of described inner annular plate (9) upper end and annular outer plate (10), and connect respectively by an elastic membrane (11) between the lower end of inner annular plate (9) lower end and annular outer plate (10), and inner annular plate (9), annular outer plate (10) and elastic membrane (11) surround the annular cavity that formation one seals, lubricating fluid is enclosed in annular cavity.
3. a kind of loud speaker according to claim 2, is characterized in that: described inner annular plate (9), annular outer plate (10) and elastic membrane (11) are same quality of rubber materials and make.
4. a kind of loud speaker according to claim 3, is characterized in that: be provided with anti-slop serrations (12) all separately on the lateral wall of described magnetic conductive core column (6) and on the madial wall of voice coil loudspeaker voice coil guide cylinder (8).
5. a kind of loud speaker according to claim 3, is characterized in that: described inner annular plate (9), annular outer plate (10) and elastic membrane (11) are integral type structure.
6. a kind of loud speaker according to claim 1, is characterized in that: described elastic membrane (11) is provided with the valve cock (13) for injecting or discharge lubricating fluid.
7. a kind of coil-moving speaker according to claim 1, is characterized in that: described air-out passage (16) is four, and four air-out passages (16) are uniformly distributed along the circumference of magnetic conductive core column (6) axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510613323.2A CN105163249B (en) | 2015-09-23 | 2015-09-23 | A kind of loud speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510613323.2A CN105163249B (en) | 2015-09-23 | 2015-09-23 | A kind of loud speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105163249A true CN105163249A (en) | 2015-12-16 |
| CN105163249B CN105163249B (en) | 2018-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510613323.2A Active CN105163249B (en) | 2015-09-23 | 2015-09-23 | A kind of loud speaker |
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| Country | Link |
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| CN (1) | CN105163249B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110582041A (en) * | 2019-08-14 | 2019-12-17 | 瑞声科技(新加坡)有限公司 | Sounding device and mobile terminal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1465207A (en) * | 2001-07-19 | 2003-12-31 | 松下电器产业株式会社 | Speaker and method of manufacturing the speaker |
| JP2009094626A (en) * | 2007-10-04 | 2009-04-30 | Pioneer Electronic Corp | Magnetic circuit for loudspeaker and loudspeaker |
| US7711138B2 (en) * | 2005-04-18 | 2010-05-04 | Howze Bruce W | Loudspeaker including a cone circumscribed by a stiffener |
| CN203104762U (en) * | 2013-02-28 | 2013-07-31 | 太原师范学院 | Loudspeaker with heat dissipation function |
| CN204131720U (en) * | 2014-09-29 | 2015-01-28 | 联想(北京)有限公司 | Loud speaker and electronic equipment |
-
2015
- 2015-09-23 CN CN201510613323.2A patent/CN105163249B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1465207A (en) * | 2001-07-19 | 2003-12-31 | 松下电器产业株式会社 | Speaker and method of manufacturing the speaker |
| US7711138B2 (en) * | 2005-04-18 | 2010-05-04 | Howze Bruce W | Loudspeaker including a cone circumscribed by a stiffener |
| JP2009094626A (en) * | 2007-10-04 | 2009-04-30 | Pioneer Electronic Corp | Magnetic circuit for loudspeaker and loudspeaker |
| CN203104762U (en) * | 2013-02-28 | 2013-07-31 | 太原师范学院 | Loudspeaker with heat dissipation function |
| CN204131720U (en) * | 2014-09-29 | 2015-01-28 | 联想(北京)有限公司 | Loud speaker and electronic equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110582041A (en) * | 2019-08-14 | 2019-12-17 | 瑞声科技(新加坡)有限公司 | Sounding device and mobile terminal |
| WO2021026989A1 (en) * | 2019-08-14 | 2021-02-18 | 瑞声声学科技(深圳)有限公司 | Sound production device and mobile terminal |
| CN110582041B (en) * | 2019-08-14 | 2021-06-15 | 瑞声科技(新加坡)有限公司 | Sounding device and mobile terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105163249B (en) | 2018-08-24 |
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