CN2437092Y - Voice coil for electroacoustic sensor - Google Patents

Voice coil for electroacoustic sensor Download PDF

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Publication number
CN2437092Y
CN2437092Y CN 00222469 CN00222469U CN2437092Y CN 2437092 Y CN2437092 Y CN 2437092Y CN 00222469 CN00222469 CN 00222469 CN 00222469 U CN00222469 U CN 00222469U CN 2437092 Y CN2437092 Y CN 2437092Y
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voice coil
loudspeaker voice
speech
framework
electroacoustic transducer
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Expired - Fee Related
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CN 00222469
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Chinese (zh)
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张凡
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Individual
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Individual
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Abstract

The utility model relates to a voice coil device for an electroacoustic sensor, which belongs to the field of a sensor in electricity. Two longitudinal grooves which are parallel to the shaft axis of a frame of a voice coil 017 are arranged on the outer surface of the frame of the voice coil 017; good conductive tinsel pieces 03 are filled and fixed in the grooves; a smooth symmetrical outer surface 025 is composed of the outer surfaces of the good conductive tinsel pieces and the outer surface of the frame of the voice coil; two groups or more than two groups of coaxial voice coils are wound on the smooth symmetrical outer surface; the leading wires of each group of voice coils are connected with the two tinsel pieces; the 00 position at the end part of an opening of the tinsel piece is respectively connected with two soft leading and connecting electric wires 011 of the voice coils, and thus a pair of input terminals of the electroacoustic sensor is formed.

Description

The voice coil device of electroacoustic transducer
The voice coil device of electroacoustic transducer particularly has the electroacoustic transducer of the above coaxial voice coil loudspeaker voice coils of two groups and two groups and shared one group of speech coil framework, belongs to the electroacoustic transducer field of electricity.
In the prior art, the design people provides the some kinds of loud speakers with coaxial magnetic gap more than three or three at WO99/31931 and ZL98249979.5 etc., provides simultaneously three groups or three groups of technical schemes that the above voice coil loudspeaker voice coil is connected in parallel.Replace the related description of the 7th page of relevant this invention accompanying drawing 1 of textual description book as WO99/31931.Its weak point is: prior art does not give the embodiment that is connected in parallel of two groups and two groups the above loudspeaker voice coils open fully.
The purpose of this utility model is the weak point that overcomes prior art, the some kinds of voice coil device that have different structure type, have the electroacoustic transducer of two groups and two groups above voice coil loudspeaker voice coil parallel circuitss are provided, on the basis of WO98/47312 and WO99/31931, carry out new supplementary invention.
The purpose of this utility model is achieved in that
A kind of voice coil device of electroacoustic transducer, comprise a tubular speech coil framework that links together with damping sheet and vibrating diaphragm, wound in parallel lead insulated from each other on it, the vertical two groups of above coaxial magnetic gaps that insert described electroacoustic transducer magnetic driver of described speech coil framework, described speech coil framework is a tubular skeleton of making of non-magnet material with enough rigidity, its smooth outer surface be provided with two with described tubular skeleton axial line longitudinal fluting parallel to each other, fill in the described groove and fix a tinsel with good conductive characteristic, the non-groove outer surface of the outer surface of described tinsel and described coil rack constitutes a level and smooth surface, also has an electric insulation that vertically is provided with between the described two strip metal paillon foils at interval;
The insulated conductor that level is twined on the described speech coil framework constitutes more than two groups separately independently voice coil loudspeaker voice coil A, B, C ... N, be provided with essential axially spaced-apart between every group of voice coil loudspeaker voice coil, described voice coil loudspeaker voice coil A, B, C ... N each the coaxial magnetic gap with described electroacoustic transducer driver respectively is corresponding, according to the magnetic line of force direction of vertically passing through described voice coil loudspeaker voice coil in the corresponding magnetic gap determine described voice coil loudspeaker voice coil separately around to, make described voice coil loudspeaker voice coil A, B, C ... when flowing through tone currents among the N, each voice coil loudspeaker voice coil produces unidirectional electric power F A, F B, F CF N
According to described voice coil loudspeaker voice coil around to, two lead terminals of each independent voice coil loudspeaker voice coil group be electrically connected with two described tinsels respectively and constitute a parallel circuits with 2～N group voice coil loudspeaker voice coil; An end of described tinsel and the voice coil loudspeaker voice coil jump lead of a softness are connected and fixed, and its other end then constitutes a pair of audio signal input end or the lead-out terminal of described electroacoustic transducer.Select thickness and the degree of depth of described groove and their width of described tinsel according to the operating current of described electroacoustic transducer.Described coaxial magnetic gap is the annular magnetic gap, and described speech coil framework is the cylindric speech coil framework corresponding with described magnetic gap.Described coaxial magnetic gap can also be the regular hexagon magnetic gap, described speech coil framework is the regular hexagon tubular speech coil framework corresponding with described magnetic gap, the top of each hexagon interior angle is provided with one section circular line section, the both sides of this line segment and this interior angle are tangent respectively, and its center of circle is then dropped on the angular bisector of this interior angle.Two described grooves and two described tinsels of described speech coil framework, the diameter with cylindric speech coil framework is the balanced setting of horizontal symmetry axis in the best condition.Two described grooves and two described tinsels of described speech coil framework are the balanced setting of horizontal symmetry axis with the diagonal of regular hexagon tubular speech coil framework or the center line of opposite side in the best condition.
The utlity model has following major advantage:
1. with the simple and cheap voice coil loudspeaker voice coil device that is connected in parallel, the equiva lent impedance of electroacoustic transducer is reduced, when improving electroacoustic transducer efficient, the output acoustic pressure of its low frequency end and front end is significantly improved.
2. orthohexagonal voice coil loudspeaker voice coil structure makes voice coil loudspeaker voice coil have maximum equivalent length and surface area, thereby can increase the electro-acoustic conversion efficiency and the radiating effect that improves voice coil loudspeaker voice coil of electroacoustic transducer.
The explanation of accompanying drawing drawing:
Fig. 1 shows the sectional arrangement drawing of loud speaker embodiment 1.
Fig. 2 shows the node I partial enlarged drawing of loud speaker embodiment 1.
Fig. 3 shows the magnetic circuit sectional arrangement drawing of loud speaker embodiment 2.
Fig. 4 shows the elevation of loud speaker embodiment 2 voice coil device embodiment.
Fig. 5 shows the plane outspread drawing of speech coil framework embodiment.
Fig. 6 shows the flat sectional drawing of cylindric voice coil device embodiment.
Fig. 7 shows the flat sectional drawing of regular hexagon tubular voice coil device embodiment.
Fig. 8 shows voice coil loudspeaker voice coil electrical wiring schematic diagram.
Below in conjunction with drawings and Examples the utility model is further elaborated.
Fig. 1 shows the sectional arrangement drawing of the loud speaker embodiment 1 that uses the utility model device.
Fig. 1 also is the loud speaker sectional arrangement drawing of WO99/31931 (accompanying drawing 1) embodiment 1 of the design people's proposition.
As seen from the figure, this loud speaker has three coaxial magnetic gaps 110 A, 110 BWith 110 CIn three magnetic gaps, insert coaxial voice coil loudspeaker voice coil 19 respectively A, voice coil loudspeaker voice coil 19 B, voice coil loudspeaker voice coil 19 C, they have same speech coil framework 17.According to the Lorentz force principle, the regulation voice coil loudspeaker voice coil around to and the sense of current of flowing through voice coil, make described three voice coil loudspeaker voice coils in described magnetic gap, produce unidirectional electric power F=F in same work moment of connecting tone currents A+ F B+ F C
Fig. 2 shows the node I partial enlarged drawing that uses the utility model device loud speaker embodiment 1.
Fig. 2 also is the accompanying drawing 15 of WO99/31931.
It shows the magnetic line of force flow direction in coaxial magnetic gap of embodiment 1 loud speaker and the magnetic circuit.
Fig. 3 shows the magnetic circuit sectional arrangement drawing that uses the utility model device loud speaker embodiment 1.
Fig. 3 also is the exemplary embodiments with a pair of above repulsion type magnet and a pair of above repulsion type magnetic circuit that WO99/31931 and ZL98249979.5 provide.
It has three groups of repulsion type magnet and three groups of repulsion type magnetic circuits.The inner peripheral surface of a coaxial mounted cylinder shape magnetic 0113 constitutes four coaxial magnetic gap O110 with the outer peripheral face of the radially evagination antelabium of above-mentioned four three groups of repulsion type magnetic circuits D, 0110 A, 0110 BWith magnetic gap 0110 C, in described four magnetic gaps, insert coaxial mounted four voice coil loudspeaker voice coils 019 D, 019 A, 019 BWith 019 CThe regulation voice coil loudspeaker voice coil around to for example voice coil loudspeaker voice coil 019 AWith voice coil loudspeaker voice coil 019 CFor inhour around to voice coil loudspeaker voice coil 019 DWith voice coil loudspeaker voice coil 019 BFor clockwise around to.Then constitute the pair of input terminals of described loud speaker if above-mentioned four voice coil loudspeaker voice coils all are connected in parallel, when importing tone currents on the input terminal, each voice coil loudspeaker voice coil produces unidirectional electric power F=F in same work moment A+ F B+ F C+ F D
The polarity of three groups of repulsion type magnet and three groups of repulsion type magnetic circuits and permanent-magnet line ψ 1, ψ 2, and ψ 3Flow direction shown in the arrow among the figure.Obviously, the local magnetic circuit figure that provides of Fig. 3 right side is common and consistent with the utility model Fig. 1.
Fig. 4 shows the elevation of an embodiment of loud speaker embodiment 2 voice coil device.
Four groups of described coaxial voice coil loudspeaker voice coils 019 D, 019 A, 019 B, 019 CBe wrapped on the same speech coil framework 017, on axial height, be provided with essential space H between every group of voice coil loudspeaker voice coil.A lead terminal 019 of above-mentioned four groups of voice coil loudspeaker voice coils D0, 019 A0, 019 B0, 019 O0Be welded to connect with a tinsel (for example red copper foil) 03 with non-magnetic conduction and good conductive characteristic, another lead terminal of four groups of voice coil loudspeaker voice coils then is welded to connect with other one tinsel 03 with non-magnetic conduction and good conductive characteristic.Weld the voice coil loudspeaker voice coil jump lead 011 of a softness in opening 00 end of described tinsel, with a pair of audio signal input end of this figure less than the voice coil loudspeaker voice coil jump lead 011 formation loud speaker of marking and drawing another strip metal paillon foil that comes out.After the lead terminal of all voice coil loudspeaker voice coils and voice coil loudspeaker voice coil jump lead and tinsel welding are finished, on the whole exposed conductive surface of tinsel, cover the firm and resistant to elevated temperatures insulating coating 010 of one deck.
Fig. 5 shows the plane outspread drawing of an embodiment of speech coil framework.
Speech coil framework 017 adopts insulating material such as polyimides, KAPTON etc. with certain rigidity to make.Be provided with two longitudinal flutings 02 parallel to each other with the speech coil framework axial line on the outer surface of element 017, groove 02 such as has usually at dark bottom land plane, and its degree of depth generally has only about tens microns even ten microns.On speech coil framework, an end opening 00 of groove 02 is provided convenience for being electrically connected and drawing of voice coil loudspeaker voice coil jump lead and tinsel, and the other end then seals shown in expanded view.Article one, in the groove 02 shown in tinsel (for example Copper Foil) the 03 usefulness binding agent 04 made of the good electric conducting material of the usefulness of tens micron thickness is bonded in.At this moment, the outer surface of the outer surface of tinsel 03 and speech coil framework forms a smooth well-balanced speech coil framework outer surface 025.Select the respective width of thickness, width and the groove of tinsel according to the input service electric current of electroacoustic transducer.At this moment, the current density of tinsel should not make the temperature rise of paillon foil surpass the temperature rise of the relevant voice coil loudspeaker voice coil of each group.
Fig. 6 shows the flat sectional drawing of an embodiment of the cylindric voice coil device of the utility model.
On the horizontal axis X-X of a cylindric speech coil framework 017, be provided with two longitudinal flutings 02 that are provided with the speech coil framework axis parallel, bottom portion of groove binding metal paillon foil 03.The speech coil framework 017 of bonding after finishing has a smooth well-balanced cylindrical outer surface 025.On this outer surface, along different axial heights, with four groups of voice coil loudspeaker voice coils 019 of the corresponding winding of the described magnetic gap of Fig. 3 D, 019 A, 019 BWith 019 C, its elevation can be consulted Fig. 4.In order to keep the equilibrium state of voice coil loudspeaker voice coil and speech coil framework, the unlikely generation eccentric motion of voice coil loudspeaker voice coil and cause the mechanical distortion of electroacoustic transducer, described groove 02 and tinsel 03 should be the symmetry axis setting with the diameter of cylindric speech coil framework, at this moment the utlity model has best design and operation effect.
Fig. 7 shows the flat sectional drawing of an embodiment of regular hexagon tubular voice coil device.
The speech coil framework 2017 of present embodiment has regular hexagonal cross section and corresponding coupling with orthohexagonal magnetic gap, and detailed description can be consulted the related description of WO99/31931 accompanying drawing 13B and accompanying drawing 11B.The top of each interior angle 207 of speech coil framework 2017 is equipped with one section circular line section 208, and the both sides of this line segment and this interior angle are tangent, and its center of circle is just in time dropped on the angular bisector of this interior angle.
By this figure as seen, longitudinal fluting 202 is arranged on two opposite side of regular hexagon speech coil framework 2017, and to be that symmetry axis is balanced with the center line Y-Y of opposite side be provided with.Tinsel 203 is bonded and fixed at the bottom land of groove 202, and the outer surface of the outer surface of tinsel and speech coil framework 2017 forms a level and smooth well-balanced outer surface 225.Voice coil loudspeaker voice coil 2019 levels are wrapped on the outer surface of speech coil framework.Two lead terminals of each group voice coil loudspeaker voice coil, fixing with 203 welding of two strip metal paillon foils respectively.Other can be consulted Fig. 4 explanation and be implemented.
Undoubtedly, Fig. 6 of the present utility model and Fig. 7 embodiment can twine two groups or two groups of above described voice coil loudspeaker voice coils.These voice coil loudspeaker voice coils around to the connected mode of lead terminal as long as guarantee each group voice coil loudspeaker voice coil when flowing through tone currents, voice coil loudspeaker voice coil must produce unidirectional electric power in corresponding magnetic gap.
According to the foregoing description and explanation, Fig. 8 shows the electrical wiring schematic diagram of four groups of voice coil loudspeaker voice coils in parallel of electroacoustic transducer.

Claims (5)

1. the voice coil device of an electroacoustic transducer, comprise a tubular speech coil framework that links together with damping sheet and vibrating diaphragm, wound in parallel lead insulated from each other on it, the vertical two groups of above coaxial magnetic gaps that insert described electroacoustic transducer magnetic driver of described speech coil framework is characterized in that:
A) described speech coil framework is a tubular skeleton of making of non-magnet material with enough rigidity, its smooth outer surface be provided with two with described tubular skeleton axial line longitudinal fluting parallel to each other, fill in the described groove and fix a tinsel with good conductive characteristic, the non-groove outer surface of the outer surface of described tinsel and described coil rack constitutes a level and smooth surface, also has an electric insulation that vertically is provided with between the described two strip metal paillon foils at interval;
B) insulated conductor that level is twined on the described speech coil framework constitutes more than two groups separately independently voice coil loudspeaker voice coil A, B, C ... N, be provided with essential axially spaced-apart between every group of voice coil loudspeaker voice coil, described voice coil loudspeaker voice coil A, B, C ... N each the coaxial magnetic gap with described electroacoustic transducer driver respectively is corresponding, according to the magnetic line of force direction of vertically passing through described voice coil loudspeaker voice coil in the corresponding magnetic gap determine described voice coil loudspeaker voice coil separately around to, make described voice coil loudspeaker voice coil A, B, C ... when flowing through tone currents among the N, each voice coil loudspeaker voice coil produces unidirectional electric power F A, F B, F CF N
C) according to described voice coil loudspeaker voice coil around to, two lead terminals of each independent voice coil loudspeaker voice coil group be electrically connected with two described tinsels respectively and constitute a parallel circuits with 2～N group voice coil loudspeaker voice coil;
D) the voice coil loudspeaker voice coil jump lead of described tinsel a end and a softness is connected and fixed, and its other end then constitutes a pair of audio signal input end or the lead-out terminal of described electroacoustic transducer.
E) select thickness and the degree of depth of described groove and their width of described tinsel according to the operating current of described electroacoustic transducer.
2. according to the electroacoustic transducer voice coil device of claim 1 regulation, it is characterized in that: described coaxial magnetic gap is the annular magnetic gap, and described speech coil framework is the cylindric speech coil framework corresponding with described magnetic gap.
3. according to the electroacoustic transducer voice coil device of claim 1 regulation, it is characterized in that: described coaxial magnetic gap can also be the regular hexagon magnetic gap, described speech coil framework is the regular hexagon tubular speech coil framework corresponding with described magnetic gap, the top of each hexagon interior angle is provided with one section circular line section, the both sides of this line segment and this interior angle are tangent respectively, and its center of circle is then dropped on the angular bisector of this interior angle.
4. according to the electroacoustic transducer voice coil device of claim 1 regulation, it is characterized in that: two described grooves and two described tinsels of described speech coil framework, the diameter with cylindric speech coil framework is the balanced setting of horizontal symmetry axis in the best condition.
5. according to the electroacoustic transducer voice coil device of claim 1 regulation, it is characterized in that: two described grooves and two described tinsels of described speech coil framework are the balanced setting of horizontal symmetry axis with the diagonal of regular hexagon tubular speech coil framework or the center line of opposite side in the best condition.
CN 00222469 2000-03-10 2000-03-10 Voice coil for electroacoustic sensor Expired - Fee Related CN2437092Y (en)

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CN 00222469 CN2437092Y (en) 2000-03-10 2000-03-10 Voice coil for electroacoustic sensor

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CN 00222469 CN2437092Y (en) 2000-03-10 2000-03-10 Voice coil for electroacoustic sensor

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009046682A1 (en) 2007-10-13 2009-04-16 Fan Zhang Multimedia acoustics system having audio frequency digital interface
WO2009103247A1 (en) 2008-02-21 2009-08-27 Zhang Fan Inner magnetic transducer with multiple magnectic gaps and multiple coils and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009046682A1 (en) 2007-10-13 2009-04-16 Fan Zhang Multimedia acoustics system having audio frequency digital interface
US9294843B2 (en) 2007-10-13 2016-03-22 Fan Zhang Multimedia acoustics system having audio frequency digital interface
WO2009103247A1 (en) 2008-02-21 2009-08-27 Zhang Fan Inner magnetic transducer with multiple magnectic gaps and multiple coils and preparation method thereof

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