CN101742385B - Thin type electrodynamic loudspeaker - Google Patents
Thin type electrodynamic loudspeaker Download PDFInfo
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- CN101742385B CN101742385B CN 200910266279 CN200910266279A CN101742385B CN 101742385 B CN101742385 B CN 101742385B CN 200910266279 CN200910266279 CN 200910266279 CN 200910266279 A CN200910266279 A CN 200910266279A CN 101742385 B CN101742385 B CN 101742385B
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- basin
- branch slice
- locating branch
- sound basin
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Abstract
The invention relates to a thin type electrodynamic loudspeaker. The loudspeaker comprises a speaker frame, and a magnetic circuit structure, a positioning support chip and a voice cone which are installed in the speaker frame, wherein the speaker frame is provided with a wiring board. The loudspeaker is characterized in that the magnetic circuit structure comprises a U-shaped magnetic conducting yoke, a magnet, a magnetic pole core and a voice coil, wherein the U-shaped magnetic conducting yoke is arranged in the speaker frame, and the outer bottom surface of the U-shaped magnetic conducting yoke is tightly combined with the upper bottom surface of the speaker frame; the magnet and the magnetic pole core are installed in the U-shaped magnetic conducting yoke, the lower surface of the magnet is tightly combined with the inner surface at the bottom of the U-shaped magnetic conducting yoke, and the upper surface of the magnet is tightly combined with the magnetic pole core; the voice coil is wound around the magnet and the magnetic pole core, a space is reserved between the inner wall of the voice coil and the outer wall of the magnetic pole core, and a space is also reserved between the outer wall of the voice coil and the inner wall of the U-shaped magnetic conducting yoke. The invention has the advantages of artful structure, compactness and reasonableness, optimizes the thickness while not decreasing the magnetic flux and the BL value, and can not produce excessive heat energy, thereby ensuring the acoustic performance and the reliability of the loudspeaker.
Description
Technical field
The invention belongs to the electroacoustic techniques field, relate to a kind of loud speaker, specifically a kind of thin type electrodynamic loudspeaker.
Background technology
In the prior art; The loud speaker that is applied on the plate video equipments such as LCD, PDP generally adopts infundibulate sound basin to cooperate the structure of locating branch slice; Center at infundibulate sound basin offers centre bore, and the locating branch slice that offers centre bore equally is arranged on the below of sound basin, and voice coil loudspeaker voice coil penetrates the centre bore of sound basin and locating branch slice; The center bore inner wall of the outer wall of voice coil loudspeaker voice coil and sound basin and locating branch slice is combined closely, thereby forms the vibrational system of loud speaker; And conventional magnetic structure generally is with the magnet centering, and magnet is the conductive magnetic yoke (also claiming U iron) of U type on every side around a section, and voice coil loudspeaker voice coil places between magnet and the conductive magnetic yoke, and U type conductive magnetic yoke is arranged on the outer surface of basin frame bottom surface.In order further to optimize the thickness of loud speaker, the loud speaker that also has adopts the airtight basin frame in bottom, has directly dispensed conductive magnetic yoke, has simplified magnetic structure.But this open magnetic structure that removes conductive magnetic yoke exists Distribution of Magnetic Field inhomogeneous; The too fast defective of decay on both sides, forward magnetic field uses the loudspeaker distortions of this magnetic structure bigger, and leakage field is also relatively more serious; And the voice coil loudspeaker voice coil coil sections makes voice coil loudspeaker voice coil negative impedance effect strengthen in entering zone, opposing magnetic field; Cause the voice coil loudspeaker voice coil electric current excessive, voice coil loudspeaker voice coil generates heat easily, influences the reliability of speaker operation.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the prior art; Provide that a kind of structure is ingenious, the thin type electrodynamic loudspeaker of compact and reasonable; This loud speaker does not reduce magnetic flux and BL value again in thickness optimization; Can not guarantee the acoustic performance and the reliability of loud speaker because of voice coil loudspeaker voice coil cutting magnetic line in alternating magnetic field produces excessive heat energy yet.
According to technical scheme provided by the invention; Said thin type electrodynamic loudspeaker comprises basin frame with basin shape chamber, is installed in magnetic structure, locating branch slice and sound basin in the basin frame; Magnetic structure is combined closely on basin frame bottom interior surface; Magnetic structure top installing and locating is propped up sheet, and the sound basin is installed in the locating branch slice top; On the basin frame, terminal block is installed, it is characterized in that: said magnetic structure includes U type conductive magnetic yoke, magnet, magnetic pole core and voice coil loudspeaker voice coil, and U type conductive magnetic yoke is arranged in the basin frame, and U type conductive magnetic yoke bottom outer surface and basin frame upper base surface are combined closely; In magnet and the magnetic pole core dress U type conductive magnetic yoke, magnet lower surface and U type conductive magnetic yoke bottom interior surface are combined closely, the magnet upper surface magnetic pole core of combining closely; Voice coil loudspeaker voice coil is looped around around magnet and the magnetic pole core, and the outer wall of the inwall of voice coil loudspeaker voice coil and magnet and magnetic pole core leaves the gap, and the inwall of the outer wall of voice coil loudspeaker voice coil and U type conductive magnetic yoke leaves the space equally.
As further improvement of the present invention, the center of said basin frame bottom is provided with cylindrical bump upwards, is provided with through hole in the center of U type conductive magnetic yoke, the corresponding assembling with cylindrical bump of through hole.
As further improvement of the present invention, the middle part of the basin shape chamber wall of said basin frame is provided with a circle step, and the step of the lower surface at locating branch slice edge and basin frame is combined closely; The locating branch slice center is provided with the locating branch slice mesopore, and the locating branch slice mesopore is run through in the upper end of the voice coil loudspeaker voice coil in the magnetic structure, and the inwall of locating branch slice mesopore and the outer wall of voice coil loudspeaker voice coil are combined closely; The lower surface at said sound basin edge and the upper surface at basin frame edge are combined closely; Sound basin center is provided with sound basin mesopore, and sound basin mesopore is run through in the upper end of the voice coil loudspeaker voice coil in the magnetic structure, and the inwall of sound basin mesopore and the outer wall of voice coil loudspeaker voice coil are combined closely.
As further improvement of the present invention; Said locating branch slice edge rise and fall to extend to center position, forms a wavy curved surface, and a concave surface of the inner ring of wavy curved surface vertically extends upward; Form the locating branch slice facade of a tubular; The top level of locating branch slice facade extends internally, and forms the locating branch slice plane of an annular, and the center on locating branch slice plane is the locating branch slice mesopore; Locating branch slice facade and locating branch slice plane constitute one can ccontaining magnetic structure circular cylinder; Magnetic structure is contained in this circular cylinder; The outer wall of U type conductive magnetic yoke and the inwall of locating branch slice facade have certain interval, and the top of U type conductive magnetic yoke and the lower surface on locating branch slice plane have certain interval; Said sound basin edge extends to its center position, at first is recessed to form a semicircular ring, and the inner ring of ring extends below to center position is oblique; Form a funnel shaped sound basin body; The inner ring of sound basin body vertically extends upward, and forms the sound basin facade of a tubular, and the top level of sound basin facade extends internally; Form the sound basin plane of an annular, the center on sound basin plane is a sound basin mesopore; Sound basin facade and sound basin plane constitute one can ccontaining locating branch slice facade circular cylinder, the inwall of sound basin facade and the outer wall of locating branch slice facade are combined closely, the lower surface and the locating branch slice planar upper surface on sound basin plane are combined closely.
As further improvement of the present invention, the center of said sound basin is provided with dust cap.
As a further improvement on the present invention, said locating branch slice adopts thin thickness, intensity height, good springiness, tear resistance and the good material of resistance to abrasion to make; The preferred aromatic polyamide fibre that adopts is made.
As further improvement of the present invention, said dust cap is provided with at least one concentric ring.
The present invention compared with prior art, advantage is: ingenious, the compact and reasonable of structure, through changing the mutual alignment of U type conductive magnetic yoke and locating branch slice; Optimized magnetic structure; It is big when reducing loud speaker thickness, to have overcome the loudspeaker voice coil heating, and the big shortcoming of work distortion has not only realized the structure slimming but also do not reduce magnetic flux; Do not reduce the BL value, strengthened the reliability of loud speaker.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a perspective exploded view of the present invention.
Fig. 3 is the three-dimensional cutaway view that basin frame, U type conductive magnetic yoke, magnet, magnetic pole core and voice coil loudspeaker voice coil combine situation.
Fig. 4 is the three-dimensional cutaway view that voice coil loudspeaker voice coil, locating branch slice, sound basin and dust cap combine situation.
Fig. 5 is the structural representation of locating branch slice among the present invention.
Fig. 6 is the structural representation of middle pitch basin of the present invention.
Description of reference numerals: 1-basin frame; 1a-basin frame edge; The 1b-connecting hole; 1c-basin pallet rank; The 1d-cylindrical bump; 2-U type conductive magnetic yoke; The 2a-through hole; The 3-magnet; The 4-magnetic pole core; The 5-voice coil loudspeaker voice coil; The 6-dust cap; The 6a-concentric ring; The 7-locating branch slice; 7a-locating branch slice edge; The wavy curved surface of 7b-; 7c-locating branch slice facade; 7d-locating branch slice plane; 7e-locating branch slice mesopore; 8-sound basin; 8a-sound basin edge; The 8b-ring; 8c-sound basin body; 8d-sound basin facade; 8e-sound basin plane; 8f-sound basin mesopore; The 9-terminal block.
Embodiment
Below in conjunction with concrete accompanying drawing and embodiment the present invention is described further.
As shown in the figure, the present invention mainly is made up of basin frame 1, U type conductive magnetic yoke 2, magnet 3, magnetic pole core 4, voice coil loudspeaker voice coil 5, dust cap 6, locating branch slice 7, sound basin 8 and terminal block 9.
Like Fig. 1～shown in Figure 3, the periphery of basin frame 1 is basin frame edge 1a, and basin frame edge 1a inwardly has the basin shape chamber of a depression, and basin shape chamber wall is provided with the connecting hole 1b that is used for the installation connection plate, and terminal block 9 is installed on the basin frame 1; The middle part of basin shape chamber wall is provided with a circle step 1c, and the center of basin frame 1 bottom is provided with cylindrical bump 1d upwards.
Like Fig. 1～shown in Figure 3, U type conductive magnetic yoke 2 sections are the U type, and it is arranged in the basin frame 1, and U type conductive magnetic yoke 2 bottom outer surfaces and basin frame 1 upper base surface are combined closely; Center in U type conductive magnetic yoke 2 is provided with through hole 2a, and the corresponding assembling of cylindrical bump 1d of through hole 2a and basin frame 1 bottom is to reinforce combining of U type conductive magnetic yoke 2 and basin frame 1.
Like Fig. 1～shown in Figure 3, in magnet 3 and the magnetic pole core 4 dress U type conductive magnetic yoke 2, magnet 3 lower surfaces and U type conductive magnetic yoke 2 bottom interior surfaces are combined closely, the magnet 3 upper surfaces magnetic pole core 4 of combining closely; Voice coil loudspeaker voice coil 5 is looped around around magnet 3 and the magnetic pole core 4, and the outer wall of the inwall of voice coil loudspeaker voice coil 5 and magnet 3 and magnetic pole core 4 leaves the gap, and the inwall of the outer wall of voice coil loudspeaker voice coil 5 and U type conductive magnetic yoke 2 leaves the space equally; U type conductive magnetic yoke 2, magnet 3, magnetic pole core 4 and voice coil loudspeaker voice coil 5 constitute the magnetic structure of loud speaker.
Like Fig. 1, Fig. 2, Fig. 4, shown in Figure 5, locating branch slice 7 is contained in the basin frame 1, is positioned at the magnetic structure top, and the lower surface of locating branch slice edge 7a and the step 1c of basin frame 1 combine closely; Locating branch slice edge 7a rises and falls to center position and extends; Form a wavy curved surface 7b; A concave surface of the inner ring of wavy curved surface 7b vertically extends upward, and forms the locating branch slice facade 7c of a tubular, and the top level of locating branch slice facade 7c extends internally; Form the locating branch slice plane 7d of an annular, the center of locating branch slice plane 7d is locating branch slice mesopore 7e; Locating branch slice facade 7c and locating branch slice plane 7d constitute one can ccontaining magnetic structure circular cylinder; Magnetic structure is contained in this circular cylinder; The inwall of the outer wall of U type conductive magnetic yoke 2 and locating branch slice facade 7c has certain interval; The lower surface of the top of U type conductive magnetic yoke 2 and locating branch slice plane 7d has certain interval, and locating branch slice mesopore 7e is run through in the upper end of the voice coil loudspeaker voice coil 5 in the magnetic structure, and the inwall of locating branch slice mesopore 7e and the outer wall of voice coil loudspeaker voice coil 5 are combined closely.
Like Fig. 1, Fig. 2, Fig. 4, shown in Figure 8, sound basin 8 is contained in the basin frame 1, is positioned at locating branch slice 7 tops; The upper surface of the lower surface of sound basin edge 8a and basin frame edge 1a is combined closely; Sound basin edge 8a extends to its center position, at first is recessed to form a semicircular ring 8b, and the inner ring of ring 8b extends below to center position is oblique; Form a funnel shaped sound basin body 8c; The inner ring of sound basin body 8c vertically extends upward, and forms the sound basin facade 8d of a tubular, and the top level of sound basin facade 8d extends internally; Form the sound basin plane 8e of an annular, the center of sound basin plane 8e is sound basin mesopore 8f; Sound basin facade 8d and sound basin plane 8e constitute one can ccontaining locating branch slice facade 7c circular cylinder; The inwall of sound basin facade 8d and the outer wall of locating branch slice facade 7c are combined closely; The upper surface of the lower surface of sound basin plane 8d and locating branch slice plane 7e is combined closely; Sound basin mesopore 8f is run through in the upper end of the voice coil loudspeaker voice coil 5 in the magnetic structure, and the inwall of sound basin mesopore 8f and the outer wall of voice coil loudspeaker voice coil 5 are combined closely.The center of sound basin 8 is provided with dust cap 6, and dust cap 6 tightly is enclosed within on the circular cylinder at sound basin 8 middle parts, is used to prevent that extraneous dust, pollutant from getting in the loud speaker.
Said locating branch slice 7 adopts thin thickness, intensity height, good springiness, tear resistance and the good material of resistance to abrasion to make, and preferably adopts aromatic polyamide fibre, also can be composited by multiple material.
Said dust cap is designed with several concentric rings 6a, and concentric ring 6a is used to strengthen the rigidity of dust cap 6, and self deformation of dust cap 6 prevents that it from influencing the sound property of loud speaker when reducing the vibration of loud speaker sounding.
Claims (6)
1. thin type electrodynamic loudspeaker; Comprise basin frame (1), be installed in magnetic structure, locating branch slice (7) and sound basin (8) in the basin frame (1) with basin shape chamber; Magnetic structure is combined closely on basin frame (1) bottom interior surface; Magnetic structure top installing and locating is propped up sheet (7), and sound basin (8) is installed in locating branch slice (7) top; Terminal block (9) is installed on basin frame (1); It is characterized in that: said magnetic structure includes U type conductive magnetic yoke (2), magnet (3), magnetic pole core (4) and voice coil loudspeaker voice coil (5); U type conductive magnetic yoke (2) is arranged in the basin frame (1), and U type conductive magnetic yoke (2) bottom outer surface and basin frame (1) upper base surface are combined closely; In magnet (3) and magnetic pole core (4) the dress U type conductive magnetic yoke (2), magnet (3) lower surface and U type conductive magnetic yoke (2) bottom interior surface are combined closely, magnet (3) the upper surface magnetic pole core (4) of combining closely; Voice coil loudspeaker voice coil (5) is looped around magnet (3) and magnetic pole core (4) on every side, and the outer wall of the inwall of voice coil loudspeaker voice coil (5) and magnet (3) and magnetic pole core (4) leaves the gap, and the inwall of the outer wall of voice coil loudspeaker voice coil (5) and U type conductive magnetic yoke (2) leaves the space equally;
The middle part of the basin shape chamber wall of said basin frame (1) is provided with a circle step (1c), and the step (1c) of the lower surface of locating branch slice edge (7a) and basin frame (1) is combined closely; Locating branch slice (7) center is provided with locating branch slice mesopore (7e), and locating branch slice mesopore (7e) is run through in the upper end of the voice coil loudspeaker voice coil in the magnetic structure (5), and the outer wall of the inwall of locating branch slice mesopore (7e) and voice coil loudspeaker voice coil (5) is combined closely;
The upper surface at the lower surface at said sound basin edge (8a) and basin frame edge (1a) is combined closely; Sound basin (8) center is provided with sound basin mesopore (8f), and sound basin mesopore (8f) is run through in the upper end of the voice coil loudspeaker voice coil in the magnetic structure (5), and the outer wall of the inwall of sound basin mesopore (8f) and voice coil loudspeaker voice coil (5) is combined closely;
Said locating branch slice edge (7a) rises and falls to center position and extends; Form a wavy curved surface (7b); A concave surface of the inner ring of wavy curved surface (7b) vertically extends upward, and forms the locating branch slice facade (7c) of a tubular, and the top level of locating branch slice facade (7c) extends internally; Form the locating branch slice plane (7d) of an annular, the center of locating branch slice plane (7d) is locating branch slice mesopore (7e); Locating branch slice facade (7c) and locating branch slice plane (7d) constitute one can ccontaining magnetic structure circular cylinder; Magnetic structure is contained in this circular cylinder; The inwall of the outer wall of U type conductive magnetic yoke (2) and locating branch slice facade (7c) has certain interval, and the lower surface of the top of U type conductive magnetic yoke (2) and locating branch slice plane (7d) has certain interval;
Said sound basin edge (8a) extends to its center position, at first is recessed to form a semicircular ring (8b), and the inner ring of ring (8b) extends below to center position is oblique; Form a funnel shaped sound basin body (8c); The inner ring of sound basin body (8c) vertically extends upward, and forms the sound basin facade (8d) of a tubular, and the top level of sound basin facade (8d) extends internally; Form the sound basin plane (8e) of an annular, the center on sound basin plane (8e) is a sound basin mesopore (8f); Sound basin facade (8d) and sound basin plane (8e) constitute one can ccontaining locating branch slice facade (7c) circular cylinder; The outer wall of the inwall of sound basin facade (8d) and locating branch slice facade (7c) is combined closely, and the upper surface of the lower surface on sound basin plane (8d) and locating branch slice plane (7e) is combined closely.
2. thin type electrodynamic loudspeaker as claimed in claim 1; Its characteristic also is: the center of said basin frame (1) bottom is provided with cylindrical bump (1d) upwards; Be provided with through hole (2a) in the center of U type conductive magnetic yoke (2), through hole (2a) and the corresponding assembling of cylindrical bump (1d).
3. according to claim 1 or claim 2 thin type electrodynamic loudspeaker, its characteristic also is: the center of said sound basin (8) is provided with dust cap (6).
4. thin type electrodynamic loudspeaker as claimed in claim 1 or 2, its feature also is: said locating branch slice (7) adopts thin thickness, intensity height, good springiness, tear resistance and the good material of resistance to abrasion to make.
5. according to claim 1 or claim 2 thin type electrodynamic loudspeaker, its characteristic also is: said locating branch slice (7) adopts aromatic polyamide fibre to process.
6. thin type electrodynamic loudspeaker as claimed in claim 3, its characteristic also is: said dust cap (6) is provided with at least one concentric ring (6a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910266279 CN101742385B (en) | 2009-12-24 | 2009-12-24 | Thin type electrodynamic loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910266279 CN101742385B (en) | 2009-12-24 | 2009-12-24 | Thin type electrodynamic loudspeaker |
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| Publication Number | Publication Date |
|---|---|
| CN101742385A CN101742385A (en) | 2010-06-16 |
| CN101742385B true CN101742385B (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910266279 Active CN101742385B (en) | 2009-12-24 | 2009-12-24 | Thin type electrodynamic loudspeaker |
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| CN (1) | CN101742385B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889949A (en) * | 2019-04-12 | 2019-06-14 | 无锡杰夫电声股份有限公司 | A kind of thin speaker of more suspension struts |
Families Citing this family (9)
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|---|---|---|---|---|
| CN101931847B (en) * | 2010-08-26 | 2013-05-29 | 无锡杰夫电声有限公司 | Thin type speaker based on multi-step magnetic yoke |
| CN102256197B (en) * | 2011-07-05 | 2013-10-30 | 无锡杰夫电声有限公司 | Loudspeaker with multiple sound cones |
| CN103974173A (en) * | 2014-05-23 | 2014-08-06 | 无锡杰夫电声有限公司 | High directivity loudspeaker of curved face |
| CN108235199B (en) * | 2018-03-20 | 2024-05-03 | 国光电器股份有限公司 | Loudspeaker |
| CN110381422A (en) * | 2019-06-20 | 2019-10-25 | 苏州上声电子股份有限公司 | A kind of loudspeaker of multichannel input driving |
| CN112423202A (en) * | 2020-11-16 | 2021-02-26 | 无锡杰夫电声股份有限公司 | High-power ultra-thin loudspeaker |
| CN113852890B (en) * | 2021-09-23 | 2023-05-12 | 安徽井利电子有限公司 | Abnormal sound eliminating loudspeaker system capable of preventing damage of center glue curing structure |
| CN113891222B (en) * | 2021-10-15 | 2024-01-26 | 东莞市格雷特电子科技有限公司 | Ultra-thin bass unit with series magnetic circuit |
| WO2024174617A1 (en) * | 2023-02-20 | 2024-08-29 | 彭子源 | Loudspeaker diaphragm, loudspeaker, and integrated full-range ultrathin loudspeaker |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2405390Y (en) * | 1999-11-27 | 2000-11-08 | 林和鼎 | Ultra-thin type loud-speaker |
| CN2490781Y (en) * | 2001-05-22 | 2002-05-08 | 林和鼎 | Miniature ultrathin broadband loudspeaker |
-
2009
- 2009-12-24 CN CN 200910266279 patent/CN101742385B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2405390Y (en) * | 1999-11-27 | 2000-11-08 | 林和鼎 | Ultra-thin type loud-speaker |
| CN2490781Y (en) * | 2001-05-22 | 2002-05-08 | 林和鼎 | Miniature ultrathin broadband loudspeaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889949A (en) * | 2019-04-12 | 2019-06-14 | 无锡杰夫电声股份有限公司 | A kind of thin speaker of more suspension struts |
| CN109889949B (en) * | 2019-04-12 | 2024-01-05 | 无锡杰夫电声股份有限公司 | Thin loudspeaker with multiple suspension supports |
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| CN101742385A (en) | 2010-06-16 |
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Address after: 214192 Xishan, Jiangsu, Beizhen Tin Tin Tin Road, No. eight, No. 228 Patentee after: WUXI JIEFU ELECTROACOUSTIC CO., LTD. Address before: 214192 Jiangsu Wuxi Xishan tin eight Wuxi Beizhen Geoff electroacoustic Co., Ltd. Patentee before: Jiefu Electroacoustic Co., Ltd., Wuxi |