CN1777337A - Voice coil device and speaker device using the voice coil device - Google Patents

Voice coil device and speaker device using the voice coil device Download PDF

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Publication number
CN1777337A
CN1777337A CN 200510125113 CN200510125113A CN1777337A CN 1777337 A CN1777337 A CN 1777337A CN 200510125113 CN200510125113 CN 200510125113 CN 200510125113 A CN200510125113 A CN 200510125113A CN 1777337 A CN1777337 A CN 1777337A
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CN
China
Prior art keywords
voice coil
loudspeaker
coil loudspeaker
loudspeaker voice
vibrating membrane
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CN 200510125113
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Chinese (zh)
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阿部泰久
工藤义美
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Nippon Tokita Pioneer K K
Pioneer Corp
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Nippon Tokita Pioneer K K
Pioneer Corp
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Publication of CN1777337A publication Critical patent/CN1777337A/en
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Abstract

A speaker device (100,200,300) includes a vibration system (20) having a frame (1), first and second voice coils (4), a voice coil bobbin (2) and a diaphragm (5); a magnetic circuit holder (10); and a magnetic circuit system (30) having a yoke (9), a magnet (8) and first and second plates (7). The first and second voice coils (4) are wound around the voice coil bobbin (2) with a constant space. The first plate (7a), the magnet (8) and the second plate (7b) are fixed onto a pole portion (1a) of the frame (1) in an upward order, respectively. The annular yoke (9) is mounted onto a predetermined position of the magnetic circuit holder (10) formed into a mushroom shape, and the magnetic circuit holder (10) is fixed onto the second plate (7b) via a bolt (14). Thereby, the first and second magnetic gaps are formed in the vicinity of the first and second voice coils, respectively, that is the magnetic system employs 2-magnetic gap and 2-voice coil.

Description

Voice coil loudspeaker voice coil equipment and the loudspeaker apparatus that uses this voice coil loudspeaker voice coil equipment
Technical field
The present invention relates to voice coil loudspeaker voice coil equipment and the structure that is used for the magnetic circuit of loudspeaker apparatus, and the installation method of loudspeaker apparatus.
Background technology
Traditionally, knownly comprise vibrational system and have the loudspeaker apparatus of voice coil loudspeaker voice coil around the voice coil loudspeaker voice coil equipment of axle with vibrating membrane, voice coil loudspeaker voice coil twines and around the voice coil loudspeaker voice coil of axle around axle and winding element (for example to invest voice coil loudspeaker voice coil, tape or band paper (belt paper)), and the magnetic circuit with yoke (yoke), magnet and flat board (plate).Rear side at vibrating membrane is provided with this magnetic circuit.
As such voice coil loudspeaker voice coil equipment, known have around axle and the voice coil loudspeaker voice coil of reinforcing tape around axle, voice coil loudspeaker voice coil twines should be around axle, this reinforcing tape is installed to this around on the axle and be formed for laying the localization part (for example, referring to Japanese Unexamined Patent Publication No 7-288894) of lead-in wire on this reinforcing tape on this top around axle.According to this document, form otch (cut-out) part that constitutes the lead-in wire localization part at the upside of reinforcing tape, and voice coil loudspeaker voice coil and lead-in wire weld together on the position of notch portion.
In addition, known a kind of voice coil loudspeaker voice coil with copper sheet is laid compacting tape (pressing tape) around axle on this copper sheet.This technology is disclosed in Japanese patent application No. 2003-284188.The compacting tape twines voice coil loudspeaker voice coil around axle, makes the perforate that is provided with on the compacting tape be positioned on the copper sheet.Weld together on the lead-in wire of the voice coil loudspeaker voice coil below the compacting tape and the position of outside lead in perforate.
As mentioned above, adopt voice coil loudspeaker voice coil around axle at loudspeaker apparatus, winding element is installed on this voice coil loudspeaker voice coil under the situation on the axle, and winding element is installed to voice coil loudspeaker voice coil part with the covering voice coil loudspeaker voice coil on axle, and the lead-in wire of formation voice coil loudspeaker voice coil is pulled outwardly in the end of tape.Therefore, there is a problem to be under some extraction state of lead-in wire, paillon foil stress (tinsel stress) and bending stress repeatedly act on the extraction part from the winding element of lead-in wire according to the driving of loudspeaker apparatus, and therefore lead-in wire is cut off on its bending and folding position.Particularly, when going between from winding element when the extraction part is also folding with sharp bend, going between is cut off easily in this part.
Traditionally, known a kind of outer magnet type loudspeaker apparatus, comprise have conical diaphragm, voice coil loudspeaker voice coil is around the vibrational system of axle, voice coil loudspeaker voice coil and frame, and has yoke, magnet and dull and stereotyped magnetic circuit.As the shape of conical diaphragm, known bending sections parabola shaped that is called as linear and has the picture bow with straightforward face.
As the example of this loudspeaker apparatus, known a kind of loudspeaker apparatus wherein is provided with magnetic circuit (for example, referring to Japanese patent application No. 2003-299185 and 9-18983 and Japanese Patent No. 3412291) in the front side of vibrating membrane (voice output side).(that is, the loudspeaker apparatus of " preceding magnetic circuit system ") forms magnetic gap at voice coil loudspeaker voice coil between axle and magnetic circuit in these loudspeaker apparatus, and voice coil loudspeaker voice coil twines voice coil loudspeaker voice coil corresponding to a magnetic gap (that is, " 1-magnetic gap and 1-voice coil systems ") around axle.
In the above-mentioned loudspeaker apparatus of preceding magnetic circuit system, use 1-magnetic gap and 1-voice coil systems.Therefore, in this loudspeaker apparatus, to the excessive input of voice coil loudspeaker voice coil the time, voice coil loudspeaker voice coil is around axle and voice coil loudspeaker voice coil violent oscillatory motion.Thus, voice coil loudspeaker voice coil has problem ground collision frame and magnetic circuit around axle or voice coil loudspeaker voice coil.
In addition, form in the loudspeaker apparatus of preceding magnetic circuit system of above-mentioned rectilinear conical diaphragm, have a problem to be that high band limiting frequency Fh is high usually, and therefore unwanted radio-frequency component (peak value) occurs about it in use.Be the purpose that addresses this problem, must improve the shape of vibrating membrane.For example, parabola shaped if the shape of vibrating membrane forms, peak value does not occur near high band limiting frequency Fh substantially, and can obtain smooth sound pressure characteristic.Yet in this loudspeaker apparatus, because magnetic circuit is arranged on the front side of vibrating membrane, vibrating membrane can not be bent to project to the voice output side without limits.Promptly, when use forms parabola shaped taper vibrating membrane in this loudspeaker apparatus, because the inner peripheral of vibrating membrane part (neck (neck)) is bent to project to the side of magnetic circuit, gap smaller between vibrating membrane and magnetic circuit, and therefore the magnitude of vibrations nargin (amplitude width) of vibrating membrane diminishes.
In addition, in loudspeaker apparatus, dust-proof cushion is installed to the neck of vibrating membrane, to strengthen dustproof effect according to Japanese Patent No. 3412291.Yet in this loudspeaker apparatus, when dust-proof cushion was installed to the neck (inclined-plane) of vibrating membrane by adhesive, when dust-proof cushion was installed, adhesive was by problem, and it can flow to neck one side of vibrating membrane.
Traditionally, for example, vehicle-mounted loudspeaker equipment comprise have vibrating membrane, voice coil loudspeaker voice coil is around the vibrational system of axle, voice coil loudspeaker voice coil and frame, and has yoke, magnet and dull and stereotyped magnetic circuit, and magnetic circuit is arranged on the rear side of vibrating membrane.
This vehicle-mounted loudspeaker equipment is installed in the mounting portion of car door and inner panel.For example, in loudspeaker apparatus, the part frame that is positioned at front side (voice output side) is installed on the mounting portion of automobile by fixed part.
Vehicle-mounted loudspeaker equipment with this mounting means is disclosed in Japanese patent application No. 2004-15566.In loudspeaker apparatus according to this document, by increasing heavy and thin weight, suppress the vibration that the reaction force by vibrating membrane produces to its rear side, make sound quality be modified.In addition, known a kind of speaker system, wherein the vibrating membrane oscillating component comprises magnetic field line, and in the back or the front of sound wave transmit direction voice coil loudspeaker voice coil (referring to Japanese patent application No. 61-111092) is set.Loudspeaker apparatus according to this document is installed on the casing (cabinet) by frame.
In addition, known a kind of conduction loudspeaker apparatus, two magnetic gaps wherein are set, therefore at the voice coil loudspeaker voice coil and the tweeter voice coil loudspeaker voice coil (referring to Japanese patent application No. 63-120595) that is welded on the tweeter vibrating membrane that are provided with respectively on each magnetic gap on the vibrating membrane that is welded to taper on the opposite face of magnetic circuit.
In above-mentioned vehicle-mounted loudspeaker equipment, at rear side magnetic circuit is set, and the part frame that on the mounting portion of automobile, is positioned at front side (voice output side).Therefore, the center of gravity of vehicle-mounted loudspeaker equipment is positioned near the rear side.Thus, when driving vehicle-mounted loudspeaker equipment, the vibration vibration of membrane is transferred into the mounting portion of automobile by frame, so the mounting portion has problem ground to produce abnormal sound.
Summary of the invention
Finish the present invention to address the above problem.The loudspeaker apparatus that the purpose of this invention is to provide a kind of voice coil loudspeaker voice coil equipment and this voice coil loudspeaker voice coil equipment of use can prevent that the lead-in wire of voice coil loudspeaker voice coil from cutting off when driving voice coil loudspeaker voice coil equipment.
Another object of the present invention provides loudspeaker apparatus, can prevent that voice coil loudspeaker voice coil is around the collision of axle and magnetic circuit and be suppressed near the high band limiting frequency Fh unnecessary radio-frequency component (peak value).In addition, also purpose of the present invention provides a kind of loudspeaker apparatus, can prevent that adhesive flow from arriving neck one side of vibrating membrane when being installed to bumper member (comprising dust reduction capability) on the vibrating membrane.
In addition, also purpose of the present invention is by the voice output side (front side) on vibrating membrane magnetic circuit to be set to improve weight balancing, suppress unnecessary vibration thus to the transmission of auto loud hailer mounting portion with from the appearance of the abnormal sound of loud speaker mounting portion, and make that the outstanding size of loudspeaker apparatus from the loud speaker mounting portion to the voice output side is as much as possible little.
According to an aspect of the present invention, provide a kind of voice coil loudspeaker voice coil equipment, comprising: voice coil loudspeaker voice coil is around axle; Voice coil loudspeaker voice coil has lead-in wire and twines voice coil loudspeaker voice coil around axle; And winding element, it is divided at least two parts and is installed on voice coil loudspeaker voice coil on axle, to cover the part of lead-in wire, wherein go between voice coil loudspeaker voice coil around axle and will be by the winding element of extracting out from the edge of the winding element that separates between by the curved shape that little by little bends and be bent into.
Above-mentioned voice coil loudspeaker voice coil equipment comprises and forms columniform voice coil loudspeaker voice coil around axle, voice coil loudspeaker voice coil, and it has lead-in wire and twines voice coil loudspeaker voice coil around axle and winding element, and for example, it is divided at least two parts, and is installed on voice coil loudspeaker voice coil on axle.As winding element, the assembly of for example can be arbitrarily crooked durable band paper preferably imposes on one surface with adhesive.Preferably, winding element is divided at least two parts, these two parts voice coil loudspeaker voice coil around axle axially on not overlapping, and be installed on voice coil loudspeaker voice coil on axle, to cover the part of lead-in wire.Therefore, between two parts of winding element, be formed for extracting out the edge of lead-in wire.
Be applied to loudspeaker apparatus if will have the voice coil loudspeaker voice coil equipment of this structure, when driving loudspeaker apparatus, voice coil loudspeaker voice coil equipment vibrates on direction of principal axis.Particularly, in voice coil loudspeaker voice coil equipment, because the sweep of lead-in wire is little by little bent and be bent into curved shape, when driving voice coil loudspeaker voice coil equipment, the stress that cuts off lead-in wire acts on sweep hardly, and this stress is also never concentrated at sweep.Therefore, can prevent to cut off lead-in wire
In above-mentioned voice coil loudspeaker voice coil equipment, the sweep of lead-in wire is preferably acute angle.By bending lead is acute angle, can reduce to cut off the probability of lead-in wire.
In the mode of above-mentioned voice coil loudspeaker voice coil equipment, winding element can have first winding element and second winding element.The part of lead-in wire can be covered by first winding element, and the sweep of lead-in wire can be covered by second winding element.In this mode, the part of lead-in wire can be covered by first winding element, and the sweep of lead-in wire can be covered by second winding element.Therefore, when driving voice coil loudspeaker voice coil, can prevent that stress is concentrated at the sweep of lead-in wire.
In the preferred embodiment of above-mentioned voice coil loudspeaker voice coil equipment, lead-in wire can be at voice coil loudspeaker voice coil between the axle and second winding element, and crooked on the direction from second winding element to first winding element, this second winding element can be drawn out of on the excircle direction of first winding element.Thus, the end friction of can suppress to go between the edge between first and second winding elements and second winding element, and reduce to cut off the probability of lead-in wire.
In other modes of above-mentioned voice coil loudspeaker voice coil equipment, winding element can be fixed to voice coil loudspeaker voice coil on axle with lead-in wire in the mode that lead-in wire does not move.Therefore, can prevent day because the moving of voice coil loudspeaker voice coil equipment, lead-in wire move with the end friction of winding element and lead-in wire thus by friction sawing.
According to a further aspect in the invention, provide a kind of loudspeaker apparatus, having comprised: magnetic circuit; And vibrational system, involving vibrations film and above-mentioned voice coil loudspeaker voice coil equipment, wherein go between voice coil loudspeaker voice coil around axle and will be by the winding element of extracting out from the edge of the winding element that separates between by the curved shape that little by little bends and be bent into, and wherein magnetic circuit is set in the voice output side of vibrating membrane.That is, the voice output side (front side) at vibrating membrane is provided with magnetic circuit.The loudspeaker apparatus of magnetic circuit system before above-mentioned voice coil loudspeaker voice coil equipment can be applicable to.In the loudspeaker apparatus of preceding magnetic circuit system, because the lead-in wire of voice coil loudspeaker voice coil is drawn out of on the magnetic circuit direction of the voice output side that is positioned at voice coil loudspeaker voice coil equipment, lead-in wire is an acute angle from the extraction unit partial volume mutability of voice coil loudspeaker voice coil equipment, and occurs the cut-out that goes between easily in this part.In this, in loudspeaker apparatus of the present invention, because the lead-in wire of voice coil loudspeaker voice coil is by little by little crooked to be fixed the cut-out that can suppress to go between by winding element.
In some sense, above-mentioned loudspeaker apparatus can further comprise tinsel cord, it is electrically connected to the signal provision circuit of amplifier, wherein extracts an end of this tinsel cord on the voice output side of vibrating membrane out, and is electrically connected to a side of tinsel cord from the lead-in wire that twines the parts extraction.Thus, extraction part that can be by tinsel cord and lead-in wire is applied to voice coil loudspeaker voice coil with signal and electric energy from the signal provision circuit of amplifier.
Ground also on the one hand according to the present invention, a kind of loudspeaker apparatus is provided, the involving vibrations system, involving vibrations film and magnetic circuit, wherein magnetic circuit is provided with in the voice output side of vibrating membrane, wherein magnetic circuit comprises the magnetic gap of plural number, and vibrational system comprises voice coil loudspeaker voice coil around axle with twine the voice coil loudspeaker voice coil of voice coil loudspeaker voice coil around the plural number of axle, and wherein each corresponding voice coil loudspeaker voice coil is separately positioned in each magnetic gap.
In preferred embodiment, magnetic circuit can comprise first flat board, the magnet that is provided with on first flat board, the two sides all is magnetized, second flat board, is arranged on the magnet and yoke, relative with each outer peripheral wall (wall) of first flat board, the magnet and second flat board have constant interval.In addition, the magnetic gap of plural number can comprise first magnetic gap and second magnetic gap, and first magnetic gap can be between first flat board and yoke, and second magnetic gap can be between second flat board and yoke.In addition, the voice coil loudspeaker voice coil of plural number can comprise first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil, and first voice coil loudspeaker voice coil can be provided with in first magnetic gap, and second voice coil loudspeaker voice coil can be provided with in second magnetic gap.That is, loudspeaker apparatus comprises the magnetic circuit of 2-magnetic gap and 2-voice coil systems.In addition, the magnetic field that preferably is formed in first and second magnetic gaps relatively is provided with in the opposite direction.
In another preferred embodiment, loudspeaker apparatus also can comprise the signal provision circuit, it provides the signal of telecommunication with same level and phase place to first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil, and wherein first voice coil loudspeaker voice coil has identical effective line length with second voice coil loudspeaker voice coil and twines relatively in the opposite direction.In the case, in loudspeaker apparatus, when the signal of telecommunication that will have same level and phase place when the signal provision circuit inputs to first and second voice coil loudspeaker voice coils, voice coil loudspeaker voice coil is around shaft vibration and therefore send sound wave from the front side (voice output side) of vibrating membrane.Substitute this example, loudspeaker apparatus can further comprise the signal provision circuit, it provides the signal of telecommunication with same level and phase place to first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil, and wherein first voice coil loudspeaker voice coil has identical effective line length with second voice coil loudspeaker voice coil and twines relatively in the same direction.In the case, in loudspeaker apparatus, when the signal of telecommunication that will have same level and phase place when the signal provision circuit inputs to first and second voice coil loudspeaker voice coils, voice coil loudspeaker voice coil is around shaft vibration and therefore send sound wave from the front side (voice output side) of vibrating membrane.
Particularly, loudspeaker apparatus uses 2-magnetic gap and 2-voice coil systems.Therefore, when for a certain reason to first and second voice coil loudspeaker voice coils import excessive input signal and voice coil loudspeaker voice coil around axle therefore towards the voice output side when mobile significantly, first voice coil loudspeaker voice coil is arranged in second magnetic gap (situation 1).Simultaneously, when import to first and second voice coil loudspeaker voice coils excessive input signal and voice coil loudspeaker voice coil around axle therefore towards with the opposition side of voice output side when mobile significantly, second voice coil loudspeaker voice coil is arranged in first magnetic gap (situation 2).
In situation 1, first voice coil loudspeaker voice coil is by the influence of magnetic field of second magnetic gap, and is used for the power (damping force) that the opposition side to the voice output side moves and acts on first voice coil loudspeaker voice coil.That is, in the case,, can limit voice coil loudspeaker voice coil and move significantly towards the voice output side around axle owing to the opposition side of first voice coil loudspeaker voice coil towards the voice output side moves.
On the other hand, in situation 2, second voice coil loudspeaker voice coil is by the influence of magnetic field of first magnetic gap, and is used for acting on second voice coil loudspeaker voice coil to the power (damping force) of voice output side shifting.That is, in the case,, moves significantly second voice coil loudspeaker voice coil around the opposition side of axle towards the voice output side because, can limiting voice coil loudspeaker voice coil towards the voice output side shifting.Thus, can suppress voice coil loudspeaker voice coil around axle and relative magnetic circuit and frame collision.
In the mode of above-mentioned loudspeaker apparatus, vibrational system can comprise frame, has ledge, and is side-prominent in the voice output of vibrating membrane, and magnetic circuit can be arranged on this ledge and can be surrounded by the space that forms on the voice output side of vibrating membrane.
According to this mode, the thickness of the loudspeaker apparatus on the direction of vibration can be little, and by total amount, loudspeaker apparatus can approach.
In preferred embodiment, vibrational system can comprise supporting member, is used to support yoke, for example is arranged on the magnetic circuit support on second flat board.Supporting member preferably is made of nonmagnetic substance.In addition, supporting member can have the space, and voice coil loudspeaker voice coil can move on the moving direction of axle at voice coil loudspeaker voice coil around axle therein.Thus, can drive voice coil loudspeaker voice coil smoothly around axle.
In the another kind of mode of above-mentioned loudspeaker apparatus, magnetic circuit can comprise yoke, wherein the bumper member with buffer function can be set on the outer peripheral wall of yoke.In preferred embodiment, bumper member can be relative with vibrating membrane, has constant interval.Thus, even when excessive input signal is input to first and second voice coil loudspeaker voice coils and vibrating membrane therefore towards the voice output side when mobile significantly from the signal provision circuit, because bumper member runs foul of each other with relative vibrating membrane, can avoid vibrating membrane and magnetic circuit directly to run foul of each other.As bumper member, be preferably the member for example sponge and the amino Shen acetoacetic ester that for example have buffer function.
In the another kind of mode of above-mentioned loudspeaker apparatus, can be arranged on step (step) part that has flat surfaces on the direction perpendicular to the vibrating membrane moving direction at the inner peripheral portion branch of vibrating membrane.
Thus, when vibrating membrane vibrates, because stress on direction of vibration reduces and diminish in the hardness of step part, such advantage is arranged, be that high band limiting frequency Fh reduces and can suppress appearance (height cut ripple operation (high-cut corrugation operation)) about its unwanted radio-frequency component (peak value) thus.
In the another kind of mode of above-mentioned loudspeaker apparatus, the bumper member that has buffer function and form annular can be set on flat surfaces.
According to this mode, on the flat surfaces of step part, the bumper member that has buffer function and form annular is set.That is, because step part has flat surfaces, the bumper member that forms annular can be placed on the appropriate location of vibrating membrane, and this bumper member can be easily mounted on the flat surfaces.In addition, when using adhesive bumper member to be installed on the flat surfaces of step part, adhesive never flows to inner peripheral edge part one side (neck one side) of vibrating membrane.That is, because the flat surfaces of step part has the plane, even adhesive is applied on the flat surfaces of step part, adhesive gathers on the flat surfaces of step part.Therefore, adhesive never flows to inner peripheral edge part one side (neck one side) of vibrating membrane.In addition, bumper member is as dust-proof member, and can prevent that the dust that enters from the voice output side of vibrating membrane from entering the inboard of magnetic circuit by the gap, and this gap is between the upper end and yoke of bumper member.
Therefore in addition, when importing excessive input signal and vibrating membrane to first and second voice coil loudspeaker voice coils towards the voice output side when mobile significantly, vibrating membrane is near magnetic circuit.Yet, in the case,, can prevent that magnetic circuit and vibrating membrane from running foul of each other because bumper member contacts with relative magnetic circuit.That is, bumper member has function and the dust reduction capability as the vibration absorber member.
Also on the one hand provide a kind of loudspeaker apparatus according to of the present invention, be included in the magnetic circuit on the voice output side of vibrating membrane; Vibrational system, the involving vibrations film; And the mounting portion, will be installed on the mounting base, wherein on position, the mounting portion is set corresponding to the center of gravity of loudspeaker apparatus.
Above-mentioned loudspeaker apparatus comprises magnetic circuit and has the vibrational system of vibrating membrane.In loudspeaker apparatus, the heavy magnetic circuit in its assembly is set at the voice output side (front side) of vibrating membrane.Therefore, the center of gravity of loudspeaker apparatus is positioned at voice output side (front side).Particularly, in loudspeaker apparatus, on position, the mounting portion is set corresponding to the center of gravity of loudspeaker apparatus.In preferred embodiment, the mounting portion can be positioned on the plane that comprises the loud speaker center of gravity, and is substantially perpendicular on the plane of direction of vibration of vibrating membrane.The mounting portion of Fang Zhiing is installed on the mounting base by the fixed component of for example bolt like this.Thus, loudspeaker apparatus is fixed on the mounting base.As mounting base, the car door and the inner panel of baffle plate and the motor vehicle assembly such as the automobile of casing arranged.
Thus, the assembly of loudspeaker apparatus can be little with respect to the position of mounting base in the distance (the outstanding degree of depth) of the voice output lateral process of vibrating membrane.Therefore, for example when loudspeaker apparatus is installed on the car door of automobile and the inner panel, the assembly of loudspeaker apparatus projects into the degree of depth of seat one side of automobile from car door and inner panel surface can be as much as possible little.Therefore, loudspeaker apparatus can be easily mounted on various types of positions of automobile.
In preferred embodiment, vibrational system can comprise frame, has jut at the voice output lateral process of vibrating membrane, with form cup-shaped basically and from the outward extending flange in the bottom of jut (flange) part, this flange portion can have first flat, the outside outer edge part and second flat of the part supporting damping (damper) in the middle of basically, the outside outer edge part on end side-strut edge thereon.In addition, the installation site can be the lower surface of second flat.That is, the lower surface of second flat of frame becomes the mounting portion.
In preferred embodiment, the height from the lower surface of jut to the mounting portion can be identical to the height of center of gravity (gravity) with the lower surface from jut.
In the mode of above-mentioned loudspeaker apparatus, magnetic circuit can comprise first flat board, be arranged on magnet on first flat board, be arranged on second flat board and yoke on the magnet, relative with each outer peripheral wall (wall) of first flat board, the magnet and second flat board have constant interval.In addition, magnetic circuit can be arranged on the jut, and the mounting portion can be positioned at and comprised on the thickness direction of magnet basically on the plane at center.
According to this mode, magnetic circuit is arranged on the voice output side (front side) of vibrating membrane.Particularly, magnetic circuit has first flat board, forms for example magnet of annular, second magnet and yoke.On first flat board magnet is set, magnet is geomagnetic into the S utmost point or the N utmost point corresponding to the surface of first and second flat sides.Second flat board is set on magnet.Yoke is relative with each outer peripheral wall of first flat board, and the magnet and second flat board have constant interval.Magnetic circuit with this structure is arranged on the voice output side (front side) of vibrating membrane, that is, and and on the jut that is the frame assembly.The mounting portion can be positioned at and comprise on the thickness direction of magnet basically on the plane at center.
When below reading during to brief description of drawings, essence of the present invention, effect and other characteristics will become clearer from following detailed description according to a preferred embodiment of the invention.
Description of drawings
Fig. 1 is the profile according to the loudspeaker apparatus of the first embodiment of the present invention;
Fig. 2 is the profile according to the amplification of the magnetic circuit system periphery of the first embodiment of the present invention;
Fig. 3 A and Fig. 3 B illustrate according to the bending of the lead-in wire of the voice coil loudspeaker voice coil of the first embodiment of the present invention and the profile of foldable structure;
Fig. 4 illustrates according to the bending of the lead-in wire of the voice coil loudspeaker voice coil of comparison example and the profile of foldable structure;
Fig. 5 is the profile of loudspeaker apparatus according to a second embodiment of the present invention;
Fig. 6 is the profile that the part of magnetic circuit periphery is according to a second embodiment of the present invention amplified;
Fig. 7 is the figure that the acoustic characteristic of the loud speaker with vibrating membrane according to a second embodiment of the present invention is shown;
Fig. 8 is the figure that the acoustic characteristic that contrasts the loudspeaker apparatus of implementing with vibrating membrane is shown;
Fig. 9 is the profile of the loudspeaker apparatus of a third embodiment in accordance with the invention;
Figure 10 is the profile that the part of the magnetic circuit system periphery of a third embodiment in accordance with the invention is amplified; And
Figure 11 is the figure of the relation between the frequency of loudspeaker apparatus of a third embodiment in accordance with the invention and vibration are quickened.
Embodiment
The preferred embodiments of the present invention are described below with reference to accompanying drawings.
(first embodiment)
(overall structure of loudspeaker apparatus)
In this embodiment, the loudspeaker apparatus of preceding magnetic circuit system comprises the magnetic gap and the voice coil loudspeaker voice coil of plural number respectively.Thus, be intended to prevent the collision of voice coil loudspeaker voice coil around axle and magnetic circuit.Equally, in this embodiment, provide the structure of the voice coil loudspeaker voice coil in the loudspeaker apparatus, particularly, can prevent the bending and the foldable structure of lead-in wire of the cut-out of voice coil leads.
The structure of the schematically illustrated loudspeaker apparatus according to an embodiment of the invention 100 of Fig. 1.Loudspeaker apparatus 100 can preferably be used as vehicle-mounted loudspeaker.Fig. 1 illustrates when the profile when the face that comprises its central shaft L1 cuts loudspeaker apparatus 100.The explanation of the structure of loudspeaker apparatus 100 will be provided below.
As shown in Figure 1, loudspeaker apparatus 100 main involving vibrations systems 20, it has frame 1, voice coil loudspeaker voice coil around axle 2, damping 3, voice coil loudspeaker voice coil 4, vibrating membrane 5 and edge 6, and magnetic circuit system 30, has flat board 7, magnet 8, yoke 9 and magnetic circuit support 10.Loudspeaker apparatus 100 also comprises the tinsel cord 13 of Bunper assembly 12, plural number, end fitting 17, bolt 14 and the famous brand 15 of plural number, as various types of members.Consider weight balancing, loudspeaker apparatus 100 is loudspeaker apparatus of preceding magnetic circuit system, has magnetic circuit system 30 at the front surface (voice output side) of vibrating membrane 5.
At first, the explanation of each assembly of vibrational system 20 will be provided.
The various types of components of loudspeaker apparatus 100 is fixed on the frame 1 frame 1 these assemblies of supporting.Frame 1 has stylolitic part 1a and flange portion 1b, stretches out with default inclination angle from the bottom of the outer peripheral wall of stylolitic part 1a.
Stylolitic part (jut) 1a is at the voice output lateral process of vibrating membrane 5.Basic center in the upper end of stylolitic part 1a forms through hole 1ac, and bolt 14 inserts these through holes.Near the basic center of the upper surface of stylolitic part 1a, be formed on the annular projection part 1ad of voice output lateral process.This annular projection part 1ad has the function of the location first dull and stereotyped 7a on the suitable location of stylolitic part 1a.Simultaneously, in the bottom of stylolitic part 1a, form and constitute circular sunk part 1ab.In sunk part 1ab, install and form plate shaped famous brand 15, printed goods name and product information in the above.
The section of flange portion 1b forms cup-shaped basically.In addition, flange portion 1b has the first flat 1ba and the second flat 1bb, and its upper surface guarantees to be the plane.Near the mid portion of flange portion 1b, form the first flat 1ba.On the first flat 1ba, the outside outer edge part of damping 3 is installed.In addition, on the first flat 1ba, the end fitting 17 of plural number is installed.Form the second flat 1bb in the upper end of flange portion 1b.On the second flat 1bb, the outside outer edge part at edge 6 is installed.
Voice coil loudspeaker voice coil forms cylindrical basically around axle 2.Voice coil loudspeaker voice coil 4 twines the outer peripheral wall of voice coil loudspeaker voice coil around axle 2.Voice coil loudspeaker voice coil 4 has the first voice coil loudspeaker voice coil 4a and the second voice coil loudspeaker voice coil 4b, and they are connected to each other on predeterminated position.The first voice coil loudspeaker voice coil 4a twines corresponding near the voice coil loudspeaker voice coil in the zone the upper end of the stylolitic part 1a outer peripheral wall around axle 2, and the second voice coil loudspeaker voice coil 4b twines near the zone of the voice coil loudspeaker voice coil outer peripheral wall upper end of axle 2.The first voice coil loudspeaker voice coil 4a and the second voice coil loudspeaker voice coil 4b can distinguish electricity and construct independently.
The first voice coil loudspeaker voice coil 4a and the second voice coil loudspeaker voice coil 4b twine the outer peripheral wall of voice coil loudspeaker voice coil around axle 2, and have constant distance betwixt.It is opposite around the winding direction of axle 2 with second voice coil loudspeaker voice coil 4b winding voice coil loudspeaker voice coil around the winding direction of axle 2 that the first voice coil loudspeaker voice coil 4a twines voice coil loudspeaker voice coil.In addition, the effective length of the first voice coil loudspeaker voice coil 4a is identical with the effective length of the second voice coil loudspeaker voice coil 4b.The first winding element 61a and the second winding element 61b (seeing Fig. 3 A) are installed on voice coil loudspeaker voice coil on the outer peripheral wall of axle 2, and this will wait a moment description.
Lead-in wire 40 twines the outer peripheral wall of voice coil loudspeaker voice coil around axle 2, and it constitutes voice coil loudspeaker voice coil 4.By bending and the method for folding of waiting a moment explanation, the front side (voice output side) that lead-in wire 40 was bent and was folded to vibrating membrane 5 is with an end of each tinsel cord 13 of being electrically connected to the front side (voice output side) that is drawn to vibrating membrane 5.Simultaneously, the other end of each tinsel cord 13 is electrically connected to an end of each end fitting 17 on the first flat 1ba that is positioned at frame 1.Equally, distolateral each corresponding incoming line that is electrically connected to amplifier of other of each end fitting 17.Therefore, the signal of telecommunication is via each relevant terminal parts 17, each tinsel cord 13 and go between 40, inputs to voice coil loudspeaker voice coil 14 from the signal provision circuit of amplifier.
Damping 13 forms annular basically, and has the elastic part that forms concentric ripple.The outer peripheral limit partial fixing of damping 3 is in the first flat 1ba of frame 1, and the inner peripheral limit partial fixing of damping 3 is in the bottom of voice coil loudspeaker voice coil around the outer peripheral wall of axle 2.
According to different application targets, can for example paper, high condensate and metal be applied to vibrating membrane 5 with numerous types of materials.Vibrating membrane 5 is conical diaphragm, and its section is folded into similar bow, that is, form described parabola shaped.The inside outer side of vibrating membrane 5 is installed near the inside outer side of damping 3 the position, and voice coil loudspeaker voice coil is near the position the bottom of the outer peripheral wall of axle 2.
The profile graphics at edge 6 becomes semicircle basically.The inside outer side at edge 6 is fixed in lower surface one side of the outer peripheral part of vibrating membrane 5, and the lower surface of the outside outer side at edge 6 is fixed on the second flat 1bb of frame 1.
(magnetic circuit system)
Below, will provide the explanation of each assembly of magnetic circuit system 30.
Form the magnetic circuit support 10 that constitutes mushroom-shaped by nonmagnetic substance.Magnetic circuit support 10 has jut 10a, column part 10b and gap 10c.
Jut 10a forms cylindrical basically, and at the sidewall upper process of the second dull and stereotyped 7b.As the core basically of the lower surface of jut 10a, be formed on the annular projection part 10ab of the side projection of magnet 8.At the core basically of jut 10a and annular projection part 10ab, be formed for the screw hole 10ac of set bolt 14.Column part 10b forms cylindrical basically.Corresponding to inside diameter from the basic mid portion of column part 10b to the column part 10b of its upper end area less than corresponding to inside diameter from the basic mid portion of column part 10b to the column part 10b of its bottom area.Therefore, at the basic mid portion of the inner peripheral wall of column part 10b, form step part 10ba.In addition, between the outer peripheral wall of the inner peripheral wall of column part 10b and jut 10a, form gap 10c.Gap 10c be therein voice coil loudspeaker voice coil around interval that axle 2 moves.The part of the bottom of the inside lateral wall by excision column part 10b forms excision (cut-out) part 10bb in the bottom of the inside of column part 10b lateral wall.Therefore, between cut-out 10bb and relative yoke 9, form at interval.
Dull and stereotyped 7 have the first dull and stereotyped 7a and the second dull and stereotyped 7b that forms basic annular.The inner peripheral wall of the first dull and stereotyped 7a contacts the outer peripheral wall of annular jut 1ab, and the lower surface of the first dull and stereotyped 7a is fixed in the upper surface of stylolitic part 1a.Thus, the first dull and stereotyped 7a is positioned on the suitable location of stylolitic part 1a, to be fixed on the stylolitic part 1a.The magnet 8 that forms annular is fixed on the first dull and stereotyped 7a.Two surfaces (upper surface and lower surface) of magnet 8 are magnetized to the S utmost point and the N utmost point.The second dull and stereotyped 7b is being fixed on the magnet 8 on the position corresponding to the first dull and stereotyped 7a.The first dull and stereotyped 7a, magnet 8 and the second dull and stereotyped 7b at voice coil loudspeaker voice coil under the covering of axle 2.
Yoke 9 forms annular basically, and has greater than the internal diameter of voice coil loudspeaker voice coil around the external diameter of axle 2.Yoke 9 is fixed in the step part 10ba of column part 10b and is arranged in this figure with respect to step part 10ba more on the inner peripheral wall of the column part 10b on the downside.Therefore, by magnetic circuit support 10 supporting yokes 9.On the portion of external peripheral wall of yoke 9, the bumper member 12 that forms annular is installed.That is, buffer 12 is installed to the bottom on the outer peripheral wall of yoke 9 in such a way, i.e. the part lower surface 10bc of the part upper surface of bumper member 12 contact column part 10b.Buffer 12 has in the time of a large amount of input electrical signal, prevents the directly function of contact magnetic circuit system 30 of vibrating membrane 5.The reason that bumper member 12 is installed to this position is when vibrating membrane 5 moves based on the suitable signal of telecommunication, prevents vibrating membrane 5 contact (interference) bumper member 12.As bumper member 12, be preferably the member that for example has as the pooling feature of sponge and amino Shen acetoacetic ester.
The magnetic circuit support 10 that yoke 9 is installed thereon is fixed on the second dull and stereotyped 7b.Particularly, the annular projection part 10ab of magnetic circuit support 10 is inserted the opening of the second dull and stereotyped 7b, and the outer peripheral wall of annular projection part 10ab contacts the inner peripheral wall of the second dull and stereotyped 7b.The part lower surface of jut 10a contacts the upper surface of the second dull and stereotyped 7b.In addition, bolt 14 inserts each perforate of stylolitic part 1a, the first dull and stereotyped 7a, magnet 8 and the second dull and stereotyped 7b of frame 1 on the direction of arrow Y1.The tip of bolt 14 (point) is fixed to the screw hole 10ac of jut 10a.Like this, the magnetic circuit support 10 that yoke 9 has been installed on it is fixed to the second dull and stereotyped 7b.
In this state, have the outer peripheral wall of constant interval ground near the upper end of the inner peripheral wall of yoke 9, and form gap (the second magnetic gap 16b) betwixt facing to the second dull and stereotyped 7b and magnet 8.On the contrary, have the outer peripheral wall of constant interval ground near the bottom of the inner peripheral wall of yoke 9, and form gap (the first magnetic gap 16a) betwixt facing to the first dull and stereotyped 7a and magnet 8.That is, magnetic circuit system 30 has the first magnetic gap 16a and the second magnetic gap 16b, also has correspondence their the first voice coil loudspeaker voice coil 4a and the second voice coil loudspeaker voice coil 4b (that is, 2-magnetic gap and 2-voice coil systems) respectively.In magnetic circuit system 30, the magnetic line of force of magnet 8 is assembled at the second magnetic gap 16b and the first magnetic gap 16a.Particularly, in magnetic circuit system 30, be formed with following magnetic circuit (magnetic field): magnet 8 → the first dull and stereotyped 7a → dull and stereotyped 7b → magnet 8 of first magnetic gap 16a → yoke, 9 → the second magnetic gap 16b → second.Should notice that the group of the first dull and stereotyped 7a and the first magnetic gap 16a and the group of the second dull and stereotyped 7b and the second magnetic gap 16b are equal to, thereby their order can be changed.And, in magnetic circuit system 30, near the magnetic direction that forms the first dull and stereotyped 7a, magnet 8 and the yoke 9 and the second dull and stereotyped 7b, magnet 8 and yoke 9 near the magnetic direction of formation opposite, this will illustrate below.
In above-mentioned loudspeaker apparatus 100, will be from the signal of telecommunication of amplifier output via each end fitting 17, each tinsel cord 13 with go between and 40 output to the first voice coil loudspeaker voice coil 4a.Thus, first voice coil loudspeaker voice coil 4a in the first magnetic gap 16a and the second voice coil loudspeaker voice coil 4b in the second magnetic gap 16b produce identical actuating force in the same direction respectively, and actuating force is vibrated this vibrating membrane 5 on this direction of principal axis of loudspeaker apparatus 100.Like this, loudspeaker apparatus 100 is launched sound wave on arrow Y1 direction.
Fig. 2 illustrates the amplification profile of the dashed region of Fig. 1.
As mentioned above, used the magnetic circuit system 30 of 2-magnetic gap and 2-voice coil systems in this embodiment.
That is, between the bottom near zone of the inner peripheral wall of the outer peripheral wall of the first dull and stereotyped 7a and yoke 9, form the first magnetic gap 16a.The first voice coil loudspeaker voice coil 4a twines corresponding to the voice coil loudspeaker voice coil of the upper end near zone of the stylolitic part 1a outer peripheral wall around axle 2, and the first voice coil loudspeaker voice coil 4a is arranged on the position corresponding to the first magnetic gap 16a.When observing loudspeaker apparatus 100 on the opposite direction at as shown in Figure 1 arrow Y1, the first voice coil loudspeaker voice coil 4a is by twining clockwise.In addition, near the magnetic field (that is near the magnetic field the first magnetic gap 16a) that is created on the direction of arrow Y10 the first dull and stereotyped 7a, magnet 8 and the yoke 9.
On the other hand, between the upper end near zone of the inner peripheral wall of the outer peripheral wall of the second dull and stereotyped 7b and yoke 9, form the second magnetic gap 16b.The second voice coil loudspeaker voice coil 4b twines voice coil loudspeaker voice coil near the upper end of the outer peripheral wall of axle 2, to be arranged on the position corresponding to the second magnetic gap 16b.When observing loudspeaker apparatus 100 on the opposite direction at as shown in Figure 1 arrow Y1, the second voice coil loudspeaker voice coil 4b is by twining counterclockwise, and winding direction is opposite with the winding direction of the first voice coil loudspeaker voice coil 4a.In addition, near the magnetic field (that is near the magnetic field the second magnetic gap 16b) that is created on the direction of arrow Y11 the second dull and stereotyped 7b, magnet 8 and the yoke 9.
It should be noted that in other embodiments near the magnetic direction that can generate the first magnetic gap 16a respectively is set to the direction of arrow Y11, near the magnetic direction that generates the second magnetic gap 16b is set to the direction of arrow Y10.In addition, the effective length of the second voice coil loudspeaker voice coil 4b is identical with the effective length of the first voice coil loudspeaker voice coil 4a.According to said structure, the first and second voice coil loudspeaker voice coil 4a and 4b can distinguish mobile in the same direction equal length.
In above-mentioned loudspeaker apparatus 100, when the signal of telecommunication that will have same level and phase place when the signal provision circuit of amplifier inputs to the first and second voice coil loudspeaker voice coil 4a and 4b respectively, voice coil loudspeaker voice coil vibrates on the direction of arrow Y2 and Y3 around axle 2.At this moment, voice coil loudspeaker voice coil is moving in the 10c of the gap of magnetic circuit support 10 on the direction of arrow Y2 and Y3 around the upper end of axle 2.
When for a certain reason to the excessive input signal of voice coil loudspeaker voice coil 4 input, voice coil loudspeaker voice coil around axle 2 on the direction of arrow Y2 and Y3 with violent oscillatory motion.That is, when hypothesis to the excessive input signal of voice coil loudspeaker voice coil 4 input, and voice coil loudspeaker voice coil around axle 2 therefore on the direction of arrow Y3 when mobile significantly, be positioned at the first magnetic gap 16a place near the bottom of the second voice coil loudspeaker voice coil 4b.Therefore, because the second voice coil loudspeaker voice coil 4b is by the influence of magnetic field among the first magnetic gap 16a, and according to Fu Laiming (Fleming) Left Hand Rule, the power on the direction of arrow Y2 (damping force) is acting on the second voice coil loudspeaker voice coil 4b.That is, at this moment because the second voice coil loudspeaker voice coil 4b moves on the direction of arrow Y2, limited voice coil loudspeaker voice coil around axle 2 on the direction of arrow Y3 to move significantly.Thus, prevented voice coil loudspeaker voice coil around axle 2 on the direction of arrow Y3 to move significantly and voice coil loudspeaker voice coil collides (referring to Fig. 1) around the bottom of axle 2 with relative frame 1.
On the other hand, when hypothesis to the excessive input signal of voice coil loudspeaker voice coil 4 input, and voice coil loudspeaker voice coil around axle 2 therefore on the direction of arrow Y2 when mobile significantly, be positioned at the second magnetic gap 16b place near the upper end of the first voice coil loudspeaker voice coil 4a.Therefore, the first voice coil loudspeaker voice coil 4a is by the influence of magnetic field among the second magnetic gap 16b, and according to the Fu Laiming Left Hand Rule, the power on the direction of arrow Y3 (damping force) acts on the first voice coil loudspeaker voice coil 4a.That is, at this moment because the first voice coil loudspeaker voice coil 4a moves on the direction of arrow Y3, limited voice coil loudspeaker voice coil around axle 2 on the direction of arrow Y2 to move significantly.Thus, prevented voice coil loudspeaker voice coil around axle 2 on the direction of arrow Y2 to move significantly and voice coil loudspeaker voice coil collides (referring to Fig. 1) around the upper end of axle 2 with relative magnetic circuit support 10.
As mentioned above, owing to adopt the magnetic circuit system 30 of 2-magnetic gap and 2-voice coil systems according to the loudspeaker apparatus 100 of present embodiment, even when with excessive signal when the signal provision circuit of amplifier is applied to voice coil loudspeaker voice coil 4, can suppress voice coil loudspeaker voice coil and run foul of each other around axle 2, magnetic circuit system 30, frame 1 and magnetic circuit support 10.
In addition, be applied to loudspeaker apparatus 100 with forming so-called parabola shaped vibrating membrane 5.That is, the section shape of vibrating membrane 5 is bent at the voice output lateral process, as shown in Figure 2.Therefore, when excessive signal is inputed to voice coil loudspeaker voice coil 4 since vibrating membrane 5 on the direction of arrow Y2 moving significantly, the part upper surface of vibrating membrane collides with relative yoke 9 and magnetic circuit support 10 easily.
In this, in the loudspeaker apparatus 100 according to present embodiment, the bumper member 12 with buffer function is arranged near the bottom of outer peripheral wall of yoke 9.Therefore, when vibrating membrane 5 on the direction of arrow Y2 when mobile significantly, the relative part of the upper surface of the bottom contact vibration film 5 of bumper member 12.That is, in this case, vibrating membrane 5 moves to for example position of the vibrating membrane 5x shown in the chain-dotted line, and the relative part of the upper surface of the bottom contact vibration film 5 of bumper member 12.Thus, the part upper surface that can avoid vibrating membrane 5 directly and relative the yoke 9 and relative column part 10b of magnetic circuit support 10 collide.Therefore, can prevent the injury of vibrating membrane 5.
In addition, in loudspeaker apparatus 100, magnetic circuit system 30 is arranged on the stylolitic part 1a of frame 1, makes magnetic circuit system 30 under the covering at the interval of upside (voice output side) formation of vibrating membrane 5.Thus, can avoid magnetic circuit system 30 relatively and the upper end of vibrating membrane 5 unnecessarily at last side direction upper process.And as shown in Figure 1, the distance D 1 of the direction of vibration of loudspeaker apparatus 100 can be little.That is, loudspeaker apparatus 100 can approach.
According to the present invention, be applied to loudspeaker apparatus 100 owing to will form the vibrating membrane 5 of above-mentioned parabolic shape, unnecessary radio-frequency component (peak value) does not occur near high band limiting frequency Fh, and can obtain smooth sound pressure characteristic.
(voice coil loudspeaker voice coil equipment)
Below, will provide the explanation of the structure of voice coil loudspeaker voice coil equipment, particularly,, provide the bending and the foldable structure of the lead-in wire 40 of voice coil loudspeaker voice coil 4 with reference to Fig. 3 A and 3B.Fig. 3 A is the perspective view that the voice coil loudspeaker voice coil device structure shown in Fig. 1 is shown, and it has shown the bending and the foldable structure of the lead-in wire 40 of voice coil loudspeaker voice coil 4 of the present invention.Fig. 3 B is near the enlarged drawing in the dashed region shown in Fig. 3 A lead-in wire 40, that is, and and near the sweep 40t.
As shown in Figure 3A, voice coil loudspeaker voice coil equipment comprises that voice coil loudspeaker voice coil is around axle 2, voice coil loudspeaker voice coil 4,40 be wrapped in that voice coil loudspeaker voice coil forms on the outer peripheral wall of axle 2 by going between, the first winding element 61a and the second winding element 61b, be installed to voice coil loudspeaker voice coil on the outer peripheral wall of axle 2 to cover the part lead-in wire 40 of voice coil loudspeaker voice coil 4.The first winding element 61a and the second winding element 61b form band shape, and adhesive is applied to its each side.As the first winding element 61a and the second winding element 61b, be preferably and for example be with paper and tape by random bending and material with durability.
Particularly, voice coil loudspeaker voice coil 4 comprises the first voice coil loudspeaker voice coil 4a and the second voice coil loudspeaker voice coil 4b, they voice coil loudspeaker voice coil around axle 2 axially on twine the outer peripheral wall of voice coil loudspeaker voice coil with constant interval around axle 2.That is, the second voice coil loudspeaker voice coil 4b twines voice coil loudspeaker voice coil around the upper end of the outer peripheral wall of axle 2, and the first voice coil loudspeaker voice coil 4a voice coil loudspeaker voice coil is near the mid portion of the outer peripheral wall of axle 2.In addition, the first voice coil loudspeaker voice coil 4a and the second voice coil loudspeaker voice coil 4b are connected with each other in therebetween coupling part 41.That is, the first voice coil loudspeaker voice coil 4a and the second voice coil loudspeaker voice coil 4b are electrically connected.
Lead-in wire 40 comprises extraction part 40s, the sweep 40t that extracts out from the lower end of the first voice coil loudspeaker voice coil 4a, extend and be bent into angle of bend θ 1 forming crooked gradually shape and exterior section 40u from an end of extracting part 40s out, protruding from the predeterminated position of the end of sweep 40t.
Extract part 40s out along the outer peripheral wall of voice coil loudspeaker voice coil around axle 2, extend to its bottom from the lower end of the first voice coil loudspeaker voice coil 4a near.Sweep 40t extends from an end of extracting part 40s out, and voice coil loudspeaker voice coil near the bottom of the outer peripheral wall of axle 2 by crooked and be folded into curved shape gradually, shown in dashed region E15.Bent angle θ 1 preferably is bent into the angle (acute angle more preferably) of curved shape gradually, shown in Fig. 3 B.Exterior section 40u stretches out from the predeterminated position of sweep 40t one end.
The first winding element 61a and the second winding element 61b are divided into two parts with voice coil loudspeaker voice coil around axle 2 at it on axially, and are installed on the outer peripheral wall of voice coil loudspeaker voice coil 2 to cover the part lead-in wire 40 of voice coil loudspeaker voice coil 4.The first winding element 61a and the second winding element 61b do not overlap each other.Therefore, form edge part 62 between the first winding element 61a and the second winding element 61b, lead-in wire 40 is extracted out from this edge part 62.In addition, voice coil loudspeaker voice coil around axle 2 axially on, the length of the first winding element 61a is longer than the length of in the same direction the second winding element 61b.By this way, in the voice coil loudspeaker voice coil equipment of present embodiment, because the first winding element 61a and the second winding element 61b are installed on the outer peripheral wall of voice coil loudspeaker voice coil 2, the hardness of voice coil loudspeaker voice coil 2 uprises.
The first winding element 61a is installed on the outer peripheral wall of voice coil loudspeaker voice coil 2, extracts part 40s out to cover.Therefore, extracting part 40s out is fixed on the outer peripheral wall of voice coil loudspeaker voice coil 2 by the first winding element 61a.
The second winding element 61b is installed on the outer peripheral wall of voice coil loudspeaker voice coil 2, to cover sweep 40t.Therefore, sweep 40t is fixed on the outer peripheral wall of voice coil loudspeaker voice coil 2 by the second winding element 61b.Exterior section 40u especially, is retracted to the outside from the edge part 62 between the first winding element 61a and the second winding element 61b (corresponding to the solid line part of lead-in wire 40) from predeterminated position.
Below, with reference to Fig. 1, Fig. 3 A and 3B and Fig. 4, provide with comparison example and compare, the explanation of operation of the present invention and effect.Fig. 4 is the perspective view corresponding to Fig. 3 A, and the structure according to the voice coil loudspeaker voice coil equipment 4 of comparison example is shown, that is, and and the bending and the foldable structure of lead-in wire 40.In Fig. 4, as in this embodiment, same reference numerals is pointed to identical assembly, will omit its explanation.
At first, will provide according to the bending of the lead-in wire 40 of the voice coil loudspeaker voice coil 4 of comparison example and the explanation of foldable structure.
As shown in Figure 4, the first voice coil loudspeaker voice coil 4a and the second voice coil loudspeaker voice coil 4b twine the peripheral wall of voice coil loudspeaker voice coil around axle 2 with the same structure as present embodiment.Lead-in wire 40 comprises extraction part 40s, the sweep 40v (corresponding to the part of dashed region E16) that extracts out from the lower end of the first voice coil loudspeaker voice coil 4a, from the end extension of extraction part 40s and with angle of bend θ 2 bendings, this angle θ 2 is corresponding at one end acute angle and exterior section 40u, and is protruding from the end of sweep 40v.
The first winding element 61a is connected to voice coil loudspeaker voice coil is extracted part 40s and sweep 40v out with covering around the outer peripheral wall of axle 2 a part.Therefore, these members are fixed to voice coil loudspeaker voice coil on the peripheral wall of axle 2 by the first winding element 61a respectively.Different with embodiment, in comparison example, the second winding element 61b is free of attachment to the bottom of voice coil loudspeaker voice coil around the outer peripheral wall of axle 2.
In the loudspeaker apparatus (not shown) according to comparison example, when driving voice coil loudspeaker voice coil equipment, voice coil loudspeaker voice coil is axially, that is, vibrate on the direction of as shown in Figure 4 arrow Y20.In comparison example, because sweep 40v is with angle of bend θ 2 bendings, this angle θ 2 is corresponding to the acute angle in the bottom of the first winding element 61a, when driving voice coil loudspeaker voice coil equipment, therefore paillon foil stress and bending stress repeatedly act on sweep 40v, go between 40 may be cut off at sweep 40v.
On the one hand, in the loudspeaker apparatus 100 according to present embodiment, as shown in Figure 3A, when driving, voice coil loudspeaker voice coil equipment vibrates on the direction of arrow Y20, and is similar to the situation of comparison example.Yet the problems referred to above of comparison example do not take place.
That is, in the present embodiment, particularly, the sweep 40t of lead-in wire 40 is bent into curved shape gradually with angle of bend θ 1 bending.Then, under the constant state of angle of bend θ 1, by the second winding element 61b stationary curved part 40t.Therefore, when driving voice coil loudspeaker voice coil equipment on the direction of arrow Y20, the stress that cuts off lead-in wire 40 does not act on sweep 40t.That is, stress does not gather on sweep 40t.Thereby, can prevent to cut off the lead-in wire 40 of voice coil loudspeaker voice coil 4.
In addition, extract part 40s out and be fixed in voice coil loudspeaker voice coil on the outer peripheral wall of axle 2, and sweep 40t is fixed in voice coil loudspeaker voice coil on the outer peripheral wall of axle 2 by the second winding element 61b by the first winding element 61a.Thus, when driving voice coil loudspeaker voice coil equipment, can prevent to extract part 40s out and sweep 40t moves around axle 2 with respect to voice coil loudspeaker voice coil.Therefore, when driving, the stress that can suppress to cut off them and prevents to cut off these assemblies on these assemblies.
Because exterior section 40u is outwards extracted out from end extension and the edge part 62 between the first winding element 61a and the second winding element 61b of sweep 40t, can easily exterior section 40u be electrically connected with tinsel cord 13.
As shown in Figure 1, crooked exterior section 40u is electrically connected to an end of tinsel cord 13, and this tinsel cord 13 is extracted out from the voice output side of vibrating membrane 5.Thus, when driving loudspeaker apparatus 100, owing to the motion with voice coil loudspeaker voice coil equipment, deformation optionally forms the exterior section 40u of curved shape, and the stress that cuts off it does not act on exterior section 40u.Therefore, can prevent to cut off exterior section 40u.
(improvement)
In the present embodiment, voice coil loudspeaker voice coil equipment comprises two winding elements, i.e. the first winding element 61a and the second winding element 61b.Yet the present invention is not restricted to this.In the present invention, can construct the first winding element 61a and the second winding element 61b with plural winding element respectively.
In the above-described embodiments, before voice coil loudspeaker voice coil equipment of the present invention is applied in the loudspeaker apparatus 100 of magnetic circuit system, in this preceding magnetic circuit system, magnetic circuit system 30 is set in the voice output side (front side) of vibrating membrane.Yet the present invention is not restricted to this.That is, voice coil loudspeaker voice coil equipment of the present invention can be applied in the loudspeaker apparatus 100 of back magnetic circuit equipment, in this back magnetic circuit equipment, magnetic circuit system 30 be set at the rear side (opposite side of voice output side) of vibrating membrane.
(second embodiment)
Similar to first embodiment, in a second embodiment, the magnetic gap and the voice coil loudspeaker voice coil of plural number is set in the loudspeaker apparatus of preceding magnetic circuit system, make to prevent the collision of voice coil loudspeaker voice coil around axle and magnetic circuit.In addition, in a second embodiment, the step part with upper surface is arranged on the inner peripheral part (neck) of vibrating membrane, has the plane on this upper surface.Thus, can be suppressed near the unnecessary radio-frequency component (peak value) of high band limiting frequency Fh, the installment work with bumper member of buffer function and dust reduction capability can be easier.
Below, provide explanation with reference to figure 5 and Fig. 6 according to the structure of the loudspeaker apparatus 200 of second embodiment.Identical reference number points to the member identical with the loudspeaker apparatus 100 of first embodiment, with the explanation of omission to them.Fig. 5 illustrates the profile according to the loudspeaker apparatus 200 of second embodiment, when cutting loudspeaker apparatus 200 by the plane that comprises its central shaft L1.Fig. 6 illustrates the fragmentary cross-sectional view corresponding to the dotted portion E3 of Fig. 5.
According to the structure of the loudspeaker apparatus 200 of second embodiment basically with structural similarity according to the loudspeaker apparatus 100 of first embodiment.Yet above-mentioned two embodiment are in the installation site of the shape of the column part 10b of the structure of vibrating membrane 5, magnetic circuit support 10, bumper member 12 and to extract out on the method for tinsel cord 13 be different.Particularly, the loudspeaker apparatus 200 according to second embodiment has feature on the structure of vibrating membrane 5.
Especially, in the loudspeaker apparatus 200 of second embodiment, form step part 5a near the inner peripheral part (neck) of vibrating membrane 5, this step part 5a forms step shape.The upper surface 5ab of step part 5 has the plane.By the adhesive (not shown) bumper member 12 is installed on the upper surface 5ab of step part 5a.That is, in first embodiment, buffer component 12 is installed on the outer peripheral wall of yoke 9.Yet in a second embodiment, buffer component 12 is installed on the upper surface 5ab of step part 5a of vibrating membrane 5.In addition, in a second embodiment, by buffer component 12 being installed on the upper surface 5ab of step part 5a, each end of the tinsel cord 13 of plural number is drawn to the position of downside of step part 5a of vibrating membrane 5 and the upside (voice output side) that is drawn to vibrating membrane 5.Each end of tinsel cord 13 is electrically connected to respectively on each lead-in wire (not shown) of the corresponding first voice coil loudspeaker voice coil 4a and the second voice coil loudspeaker voice coil 4b.
Bottom at the inner peripheral wall of the column part 10b of magnetic circuit support 10 forms cut-out 10bb by excising its part.The excision size of the cut-out 10bb of second embodiment is bigger than first embodiment's.Therefore, the gap that forms between the outer peripheral wall of the cut-out 10bb of second embodiment and yoke 9 is bigger than the corresponding gap of first embodiment.Reason is as described below.As mentioned above, in second implements, bumper member 12 is installed on the upper surface 5ab of step part 5a of vibrating membrane 5, rather than on the side of magnetic circuit system 30.Therefore, when vibrating membrane 5 was mobile on the direction of Y2 arrow, bumper member 12 also correspondingly moved in the same direction.At this moment, if bumper member 12 is collided with the relative column part 10b of magnetic circuit support 10, can not launch suitable sound wave.Therefore, the excision size of cut-out 10bb is made to such an extent that compare the big of first embodiment, makes that bumper member 12 is not collided with column part 10b when driving according to the suitable signal of telecommunication.That is, when vibrating membrane moved according to the suitable signal of telecommunication, the upper end that has prevented bumper member 12 interfered with each other with relative column part 10a.
Above-mentioned loudspeaker apparatus 200 has following operation and effect.
At first, because the loudspeaker apparatus 200 according to second embodiment uses 2-magnetic gap and the 2-voice coil systems similar to first embodiment, even when excessive input signal is inputed to voice coil loudspeaker voice coil 4, can suppress voice coil loudspeaker voice coil around axle 2 and magnetic circuit system 30, frame 1 and 10 collisions of magnetic circuit support.
In addition, in the loudspeaker apparatus 200 according to second embodiment, near the inner peripheral part of vibrating membrane 5 step part 5a is set, the upper surface 5ab of this step part 5a has the plane.Thus, the bumper member 12 that forms annular can be placed on the correct position of vibrating membrane 5, and bumper member 12 can be easily mounted to upper surface 5ab.When with adhesive bumper member 12 being easily mounted to the upper surface 5ab of step part 5a, adhesive can not flow to the side of the inner peripheral edge part of vibrating membrane 5.That is, because the upper surface 5ab of step part 5a has the plane, when promptly suitably adhesive being applied to the upper surface 5ab of step part 5a, adhesive gathers on the upper surface 5ab of step part 5a.That is, adhesive can not run down into the inner peripheral edge part of vibrating membrane 5.
Because loop buffer device member 12 is installed on the upper surface 5ab of step part 5a, the gap that forms between axle 2 and vibrating membrane 5 at bumper member 12, yoke 9, the first voice coil loudspeaker voice coil 4a, voice coil loudspeaker voice coil is closed basically.Therefore, can prevent the voice output side from vibrating membrane 5, that is, the dust that the direction of arrow Y5 as shown in Figure 5 enters enters magnetic circuit system 30 via the gap between the column part 10b of the upper end of buffer 12 and yoke 9.
If bumper member 12 contacts with yoke 9 when driving loud speaker 200, can not send suitable sound wave.Therefore, between near the bottom of the outer peripheral wall of the upper end of the inner peripheral wall of bumper member 12 and yoke 9, form little gap.
In addition, as shown in Figure 6, when hypothesis excessive signal inputed to voice coil loudspeaker voice coil 4 and therefore vibrating membrane 5 be positioned at the position that vibrating membrane 5 that solid line position is in inactive state moves to the vibrating membrane 5x shown in chain-dotted line on the direction of arrow Y2 when mobile significantly.At this moment, near the inner peripheral of vibrating membrane 5 part near the bottom of the column part 10b of the bottom of yoke 9 and magnetic circuit support 10.Yet, in this case, be positioned at the position that bumper member 12 that solid line position is in inactive state moves to the bumper member 12x shown in chain-dotted line, and the relative bottom of the column part 10b of bumper member 12x contact magnetic circuit support 10.Thus, can prevent yoke 9 and a part of direct collision of magnetic circuit support 10 with the relative upper surface of vibrating membrane 5.Therefore, can prevent the damage ring of vibrating membrane 5.That is, the bumper member 12 of second embodiment has buffer function and the dust reduction capability as mat member.
As mentioned above, divide formation step part 5a in the inner peripheral portion of vibrating membrane 5.Particularly, step part 5a (direction of arrow Y2 and Y3) on perpendicular to the direction of the direction of vibration of vibrating membrane 5 has the plane.Thus, when driving loudspeaker apparatus 200, can prevent near the appearance of the unnecessary radio-frequency component (peak value) high band limiting frequency Fh.
To compare with acoustic characteristic and explain this point according to the loudspeaker apparatus of comparative example.Fig. 7 is the figure that illustrates according to the acoustic characteristic of the loudspeaker apparatus 200 of second embodiment, wherein vertical axis indication sound pressure level (SPL) and trunnion axis indication frequency (Hz).In addition, in Fig. 7, curve W1, W2 and W3 illustrate basic waveform characteristic, second harmonic distorted characteristic and third harmonic distorted characteristic respectively.Fig. 8 illustrates corresponding to Fig. 7, according to the figure of the acoustic characteristic of the loudspeaker apparatus of comparison example.The curve of survey map 8 under the condition identical with the present invention.In Fig. 8, curve W11, W12 and W13 illustrate basic waveform characteristic, second harmonic distorted characteristic and third harmonic distorted characteristic respectively.
Though omitted explanation, will be briefly described its structure according to the loudspeaker apparatus of comparison example.That is, the loudspeaker apparatus according to comparison example uses preceding magnetic circuit system and 1-magnetic gap and 1-voice coil systems (with system similarity shown in Figure 1, wherein having removed the second voice coil loudspeaker voice coil 4b).In addition, the section of vibrating membrane is formed linear, and not within it portion's periphery form step part.
Shown in the curve W1 among Fig. 7, in the loudspeaker apparatus 200 of second embodiment, obtain smooth sound pressure level in the frequency range between about 180Hz and about 3KHz.In addition, shown in the curve W1 among Fig. 7, in loudspeaker apparatus 200, high band limiting frequency Fh is about 4KHz, and the sound pressure level of high band limiting frequency Fh is about 36 (dB).High band limiting frequency Fh is that voice coil loudspeaker voice coil is not sent to the frequency of vibrating membrane 5 around the vibration of axle 7 thereon.Simultaneously, shown in the curve W11 of Fig. 8, in loudspeaker apparatus, obtain smooth sound pressure level in the frequency range between about 180Hz and about 3KHz according to comparison example, similar to the loudspeaker apparatus 200 of second embodiment.In addition, shown in the curve W11 of Fig. 8, in the loudspeaker apparatus according to comparison example, high band limiting frequency Fh is about 7.5KHz, and the sound pressure level of high band limiting frequency Fh is about 37 (dB).
Now, relatively according to the acoustic characteristic of the loudspeaker apparatus 200 of second embodiment with according to the acoustic characteristic of the loudspeaker apparatus of comparison example.
As mentioned above, be about 4KHz according to the high band limiting frequency Fh of the loudspeaker apparatus 200 of second embodiment, and be about 7.5KHz according to the high band limiting frequency Fh of comparative example's loudspeaker apparatus.Therefore, according to the high band limiting frequency Fh of the loudspeaker apparatus 200 of second embodiment less than the comparative example's.In addition, in second embodiment and comparison example, appear at respectively near the high band limiting frequency Fh as the peak value of unnecessary radio-frequency component, as shown in dashed region E5 and the dashed region E6 among Fig. 8 among Fig. 7.As by known to the size of peak value relatively, in loudspeaker apparatus 200 according to second embodiment, as the peak value of unnecessary radio-frequency component less than comparison example.To explain this reason.Especially, be expressed in high band limiting frequency Fh in the loudspeaker apparatus with following equation.
Fh＝1/2π{(1/m1)+(1/m2)}×Sn (1)
In this equation, " m1 ", " m2 " and " Sn " illustrate the hardness (N/m) of the inner peripheral part (neck) of the quality (Kg) of quality (Kg), vibrating membrane of voice coil loudspeaker voice coil 4 and vibrating membrane respectively.
In a second embodiment, the inner peripheral part (neck) at vibrating membrane 5 is provided with step part 5a.Particularly, the upper surface 5ab of step part 5a has the plane on the direction perpendicular to the direction of vibration of vibrating membrane 5, as mentioned above.Therefore, in vibration vibrating membrane 5,, reduce, and show that above-mentioned etc. the hardness Sn in (1) diminishes in the power of direction of vibration (arrow Y2 as shown in Figure 6 and Y3 direction) at step part 5a.Thus, have such advantage, be that high band limiting frequency Fh in above-mentioned equation (1) can reduce and therefore can suppress to occur unnecessary radio-frequency component (peak value) (height is cut the ripple operation) about it.On the other hand, in the loudspeaker apparatus according to comparison example, owing to use the vibrating membrane with rectilinear profiles, peak value easily occurs around high band limiting frequency Fh.
When the second harmonic distortion W12 of the second harmonic distortion curve W2 of second embodiment relatively and comparison example, on the frequency range greater than about 100Hz, the second harmonic distortion of second embodiment is less than comparison example.In addition, relation is identical between the third harmonic distortion of the third harmonic distortion of second embodiment and comparison example.That is, when the third harmonic distortion W13 of the third harmonic distortion curve W3 of second embodiment relatively and comparison example, on the frequency range greater than about 100Hz, the third harmonic distortion of second embodiment is less than comparison example.This is because used 2-magnetic gap and 2-voice coil systems in magnetic circuit system 30.Promptly, in magnetic circuit system 30, to twine voice coil loudspeaker voice coil around the winding direction of axle 2 and the second voice coil loudspeaker voice coil 4b opposite around the direction of axle 2 because the first voice coil loudspeaker voice coil 4a twines voice coil loudspeaker voice coil, when driving loudspeaker apparatus 200, counteracting (elimination) self-induction of the first voice coil loudspeaker voice coil 4a and the self-induction of the second voice coil loudspeaker voice coil 4b.
(improvement)
In above-mentioned first and second embodiment, it is opposite around the direction of axle 2 with second voice coil loudspeaker voice coil 4b winding voice coil loudspeaker voice coil around the winding direction of axle 2 that the first voice coil loudspeaker voice coil 4a twines voice coil loudspeaker voice coil, and the signal of telecommunication that will have same level and a phase place is input to they each respectively.Yet the present invention is not restricted to this.That is, in the present invention, the first voice coil loudspeaker voice coil 4a twines voice coil loudspeaker voice coil around the winding direction of axle 2 can to twine voice coil loudspeaker voice coil identical around the direction of axle 2 with the second voice coil loudspeaker voice coil 4b, and the signal of telecommunication that will have same level and an opposite phase is input to they each.In this case, also can obtain operation of the present invention and effect.
(the 3rd embodiment)
Present embodiment relates to the installation method of loudspeaker apparatus.In a word, in this embodiment, consider the overall weight balance of loudspeaker apparatus, setting is compared the magnetic circuit system with big weight with other assemblies of loudspeaker apparatus in the front side of vibrating membrane (voice output side), and the center of loudspeaker apparatus is arranged on the voice output (front side) of vibrating membrane.Then, on the mounting portion that is placed on the frame on the plane that comprises center of gravity, loudspeaker apparatus is installed on the mounting portion.Thus, the assembly of loudspeaker apparatus becomes as much as possible little with respect to the loud speaker mounting portion in the distance (the outstanding degree of depth) of the voice output lateral process of vibrating membrane.In addition, when driving loudspeaker apparatus, can suppress unnecessary vibration transmission to prevent to send abnormal sound from the loud speaker mounting portion to the loud speaker mounting portion.
Next, the explanation of the installation method of the loudspeaker apparatus 300 with said structure will be provided.Fig. 9 illustrates the structure according to the loudspeaker apparatus 300 of this embodiment.Loudspeaker apparatus 300 according to this embodiment has and the structure identical according to the loudspeaker apparatus of first and second embodiment basically.Yet, in loudspeaker apparatus 300, on the second flat 1bb, forming screw hole 1bc according to this embodiment, bolt 14 inserts among this screw hole 1bc.In loudspeaker apparatus 300, in the front side of vibrating membrane 5 (voice output side) magnetic circuit system 30 is set, this magnetic circuit system 30 has to compare with other members of loudspeaker apparatus and has big weight.Thereby the center of gravity G of loudspeaker apparatus 300 is positioned at front side (voice output side).
In addition, loudspeaker apparatus 300 has by frame 1 and is installed on mounting portion on the mounting base 60.The mounting portion is arranged on the position corresponding to the center of gravity G of loudspeaker apparatus 300.The mounting portion is corresponding to the lower surface 1bd of the second flat 1bb of frame 1.That is, the lower surface 1bd of the second flat 1bb of frame 1 is the mounting portion that is installed on the mounting base 60.In addition, the lower surface 1bd (mounting portion) of frame 1 is positioned on the planar S 1, and this planar S 1 has the center of gravity G of loudspeaker apparatus 300 and perpendicular to the direction of vibration (arrow the Y2 as shown in Figure 10 and direction of Y3) of vibrating membrane 5.In addition, the lower surface 1bd (mounting portion) of frame 1 is positioned on the planar S 1 of the basic center of gravity on the thickness direction that is included in magnet 8.And the height D2 from the lower surface of the stylolitic part 1a (jut) of frame 1 to the upper surface 60b of mounting base 60 is identical to the height of center of gravity G with lower surface from the stylolitic part 1a (jut) of frame 1.The lower surface 1bd (mounting portion) that is positioned at the stylolitic part 1a of so locational frame 1 is installed to the upper surface 60b of mounting base 60 by the fixed component as bolt 14.Thus, loudspeaker apparatus 300 is fixed to mounting base 60.Mounting base 60 is the member that constitutes automobile, for example car door and automotive interior panel.As shown in Figure 9, on mounting base 60, form opening, that is, perforate 60c is installed.In addition, as shown in Figure 9, the seat directions of automobile and the direction of car door and inner panel are shown respectively with respect to the arrow Y20 of mounting base 60 and the direction of arrow Y21.
Installation method according to the loudspeaker apparatus 300 of present embodiment is as described below.
At first, magnetic circuit system 30 is inserted the installation perforate 60c of mounting base 60 from the direction opposite with arrow Y1, and adjust the position of the screw hole 60a of the screw hole 1bc of the second flat 1bb and mounting base 60.Then, the upper surface 60ab of lower surface (mounting portion) 1bd of the second flat 1bb of frame 1 contact mounting base 60.Then, bolt 14 from the screw hole 60a of the screw hole 1bc of the direction precession second flat 1bb opposite with arrow Y1 and mounting base 60, and is tightened in the second flat 1bb and mounting base 60 together by bolt 14.Thus, loudspeaker apparatus 300 is fixed on the mounting base 60 in such a way, promptly is positioned at the upper surface 60b of lower surface (mounting portion) the 1bb contact mounting base 60 of the frame 1 on the plane that has comprised center of gravity G.At this moment, the planar S 1 that has comprised the center of gravity G of loudspeaker apparatus 300 is located substantially on the surface identical with the upper surface 60b of mounting base 60.
As mentioned above, originally executing in the example, the magnetic circuit system 30 that will have compares with other members of loudspeaker apparatus 300 has big weight is arranged on the voice output side (front side) of vibrating membrane 5, and the center of gravity G of loudspeaker apparatus 300 is arranged on front side (voice output side).In addition, being installed in mounting portion (the lower surface 1bd of frame 1) on the mounting base 60 is arranged on the position corresponding to the center of gravity G of loudspeaker apparatus 300.
Thus, the assembly of loudspeaker apparatus 300 is with respect to the upper surface 60b of mounting base 60 distance at the voice output lateral process of vibrating membrane 5, that is, the distance D 1 from the upper surface 60b of mounting base 60 to the upper surface of magnetic circuit support 10 (outstanding depth D 1) can be as much as possible little.Therefore, when car door that loudspeaker apparatus 300 is installed in automobile for example and inner dull and stereotyped going up, the degree of depth of the assembly of loudspeaker apparatus from the car door of automobile and inner dull and stereotyped protrusion of surface to vehicle seat one side can be as much as possible little.Therefore, the loudspeaker apparatus 300 of originally executing example can be installed on each position of automobile.
In addition, as mentioned above, be installed in the upper surface 60b of mounting base 60 owing to lower surface (mounting portion) 1bd of the frame 1 on the plane that is positioned at the center of gravity G that has comprised loudspeaker apparatus 300, when driving loudspeaker apparatus 300, can suppress and to be sent to a side of mounting base 60 owing to the vibration of vibrating membrane 5 by frame, and can prevent abnormal sound from mounting base 60.With reference to Figure 11 this point is described.
In Figure 11, vertical axis is represented the vibration acceleration of measuring equipment, and trunnion axis is represented the frequency of loudspeaker apparatus 300.When measuring, degree of will speed up transducer (pickup) is used as measuring equipment, and the part magnetic circuit system 30 of loudspeaker apparatus 300 is made as measurement point.Because loudspeaker apparatus 300 is installed on the mounting base 60 by bolt 14, loudspeaker apparatus 300 and mounting base 60 move as a rigid body.Curve W21 is that loudspeaker apparatus 300 is installed on the car door and inner panel as the automobile of mounting base 60, and measures the curve to the vibration transmission state of car door and inner panel.Curve W22 is that the loudspeaker apparatus according to comparison example is installed on the car door and inner panel of automobile, and is similar to the situation of curve W21, and measures the curve to the vibration transmission state of car door and inner panel.Omission is according to the explanation of the loudspeaker apparatus of comparison example, but its structure will be described.Promptly, loudspeaker apparatus according to comparison example is similar to the loudspeaker apparatus shown in Fig. 9 basically, but magnetic circuit 30 is arranged on the rear side (side opposite with the voice output side) of vibrating membrane 5, and the center G of loudspeaker apparatus is not positioned on the mounting portion of mounting base 60.
As shown in figure 11, in the loudspeaker apparatus 300 according to present embodiment, the comparison of the vibration acceleration of the acceleration transducer in wide frequency range is littler than the example.That is, in the loudspeaker apparatus 300 of present embodiment, can suppress in wide frequency range, to be sent to car door and inner panel from the vibration that vibrating membrane 5 produces.
(improvement)
In the above-described embodiments, it is opposite around the winding direction of axle 2 with second voice coil loudspeaker voice coil 4b winding voice coil loudspeaker voice coil around the winding direction of axle 2 that the first voice coil loudspeaker voice coil 4a twines voice coil loudspeaker voice coil, and the signal of telecommunication that has same level and phase place to their inputs respectively.Yet the present invention is not limited to this.Promptly, in the present invention, when forming the first voice coil loudspeaker voice coil 4a and the second voice coil loudspeaker voice coil 4b independently, first voice coil loudspeaker voice coil 4a winding voice coil loudspeaker voice coil can be identical around the winding direction of axle 2 with second voice coil loudspeaker voice coil 4b winding voice coil loudspeaker voice coil around the winding direction of axle 2, and the signal of telecommunication that has same level and phase place to their inputs respectively.

Claims (22)

1. voice coil loudspeaker voice coil equipment comprises:
Voice coil loudspeaker voice coil is around axle (2);
Voice coil loudspeaker voice coil (4) has lead-in wire (40), and twines voice coil loudspeaker voice coil around axle (2); And
Winding element (61a 61b), is divided into two parts at least, and is installed to voice coil loudspeaker voice coil on axle (2), with cover part lead-in wire (40),
Wherein (61a is little by little bent and is bent into the shape of bending between 61b) to lead-in wire (40), so that (61a is drawn out of on edge 61b) from the winding element that separates around axle (2) and winding element at voice coil loudspeaker voice coil.
2. voice coil loudspeaker voice coil equipment as claimed in claim 1, wherein the sweep (40t) of lead-in wire (40) has acute angle (θ 1).
3. voice coil loudspeaker voice coil equipment as claimed in claim 1 or 2, winding element (61a wherein, 61b) have first winding element (61a) and second winding element (61b), go between (40s) with first winding element (61a) cover part, and cover the sweep (40t) of lead-in wire with second winding element (61b).
4. as any one described voice coil loudspeaker voice coil equipment of claim 1 to 3, wherein the lead-in wire (40) at voice coil loudspeaker voice coil between axle (2) and second winding element (61b), crooked on from second winding element (61b) to the direction of first winding element (61a), on the excircle direction of first winding element (61a), to be drawn out of.
5. as any one described voice coil loudspeaker voice coil equipment of claim 1 to 4, wherein (61a 61b) is fixed to lead-in wire voice coil loudspeaker voice coil on axle (2) to winding element.
6. a loudspeaker apparatus (100) comprising:
Magnetic circuit (30); And
Vibrational system (20), involving vibrations film (5) and voice coil loudspeaker voice coil equipment, this voice coil loudspeaker voice coil equipment has: voice coil loudspeaker voice coil is around axle (2); Have lead-in wire (40) and twine the voice coil loudspeaker voice coil (4) of voice coil loudspeaker voice coil around axle (2); And be divided into two parts at least and be installed to voice coil loudspeaker voice coil around axle (2) go up winding element with cover part lead-in wire (40) (61a, 61b),
Wherein lead-in wire (40) voice coil loudspeaker voice coil around axle (2) and winding element (61a is little by little bent and is bent into the shape of bending between 61b), be drawn out of with edge from the winding element that separates,
Wherein the voice output side at vibrating membrane (5) is provided with magnetic circuit (30).
7. loudspeaker apparatus as claimed in claim 6 (100) also comprises:
Tinsel cord (13) is electrically connected to the signal provision circuit of amplifier,
Wherein extract an end of tinsel cord (13) out from the voice output side of vibrating membrane (5), and winding element (61a, the lead-in wire of extraction 61b) (40) is electrically connected to a side of tinsel cord (13).
8. a loudspeaker apparatus (100,200) comprising:
Vibrational system (20), involving vibrations film (5) and magnetic circuit (30),
Magnetic circuit (30) wherein is set on the voice output side of vibrating membrane (5),
Wherein magnetic circuit (30) comprise plural number magnetic gap (16a, 16b), and vibrational system (20) comprise voice coil loudspeaker voice coil around axle (2) and winding voice coil loudspeaker voice coil around the voice coil loudspeaker voice coil (4) of the plural number of axle (2), and
Wherein (16a is provided with each corresponding voice coil loudspeaker voice coil (4) in 16b) at each magnetic gap respectively.
9. loudspeaker apparatus as claimed in claim 8 (100,200),
Wherein vibrational system (20) comprises the frame (1) that has at the jut (1a) of the voice output side upper process of vibrating membrane (5), and
Wherein magnetic circuit (30) is arranged on the interval covering that jut (1a) is gone up and formed on the voice output side of vibrating membrane (5).
10. loudspeaker apparatus as claimed in claim 9 (100,200),
Wherein magnetic circuit (30) comprising: first flat board (7a); Be arranged on the magnet (8) on first flat board, its two sides all is magnetized; Be arranged on second flat board (7b) on the magnet; And yoke (9), relative with each outer peripheral wall of first flat board (7a), magnet (8) and second flat board (7b) have constant interval,
Wherein Fu Shuo magnetic gap (16a 16b) comprises first magnetic gap (16a) and second magnetic gap (16b),
Wherein first magnetic gap (16a) is positioned between first flat board (7a) and the yoke (9), and second magnetic gap (16b) is positioned between second flat board (7b) and the yoke (9),
Wherein Fu Shuo voice coil loudspeaker voice coil (4) comprises first voice coil loudspeaker voice coil (4a) and second voice coil loudspeaker voice coil (4b), and
Wherein first voice coil loudspeaker voice coil (4a) is arranged in first magnetic gap (16a) and second voice coil loudspeaker voice coil (4b) is arranged in second magnetic gap (16b).
11. as claim 9 or 10 described loudspeaker apparatus (100,200),
Wherein vibrational system (20) comprises the supporting member (10) that is arranged on second flat board (7b) and supports yoke (9), and
Wherein supporting member (10) has gap 10c, and voice coil loudspeaker voice coil can move on the moving direction of axle (2) at voice coil loudspeaker voice coil around axle (2) therein.
12., also comprise as claim 10 or 11 described loudspeaker apparatus (100,200):
The signal provision circuit is supplied the signal of telecommunication with same level and phase place to first voice coil loudspeaker voice coil (4a) and second voice coil loudspeaker voice coil (4b),
Wherein first voice coil loudspeaker voice coil (4a) has identical effective line length with second voice coil loudspeaker voice coil (4b) and twines relatively in the opposite direction.
13., also comprise as claim 10 or 11 described loudspeaker apparatus (100,200):
The signal provision circuit is supplied the signal of telecommunication with same level and phase place to first voice coil loudspeaker voice coil (4a) and second voice coil loudspeaker voice coil (4b),
Wherein first voice coil loudspeaker voice coil (4a) has identical effective line length with second voice coil loudspeaker voice coil (4b) and twines relatively in the same direction.
14. loudspeaker apparatus as claimed in claim 8 (100), wherein magnetic circuit (30) comprises yoke (9), and wherein the Bunper assembly (12) with buffer function is set on the outer peripheral wall of yoke (9).
15. loudspeaker apparatus as claimed in claim 8 (200) wherein is provided with step part (5a) on the inner peripheral of vibrating membrane (5) part, this step part (5a) has flat surfaces (5ab) on the direction perpendicular to the moving direction of vibrating membrane.
16. loudspeaker apparatus as claimed in claim 15 (200),
Wherein go up the bumper member (12) that has buffer function and form annular is set at flat surfaces (5ab).
17. a loudspeaker apparatus (300) comprising:
Vibrational system (20), involving vibrations film (5);
Magnetic circuit (30) is arranged on the voice output side of vibrating membrane (5); And
Mounting portion (1bd) will be installed on the mounting base (60),
Wherein mounting portion (1bd) is arranged on the position corresponding to the center of gravity (G) of loudspeaker apparatus (300).
18. loudspeaker apparatus as claimed in claim 17 (300), wherein mounting portion (1bd) is positioned on the plane of the plane of the center of gravity (G) that comprises loudspeaker apparatus and the direction of vibration that is substantially perpendicular to vibrating membrane (5).
19. as claim 17 or 18 described loudspeaker apparatus (300),
Wherein vibrational system (20) comprises having at the jut (1a) of the voice output side upper process of vibrating membrane (5) and form cup-shaped basically and from the frame (1) of the outward extending flange portion in bottom (1b) of jut (1a),
Wherein flange portion (1b) have first flat (1ba) of the outside outer edge part of basic mid portion upper support damping (3) and thereon the end side-strut along outside outer edge second flat (1bb) partly of (6), and
Wherein mounting portion (1bd) is the lower surface of second flat (1bb).
20. loudspeaker apparatus as claimed in claim 19 (300), wherein the height of (1bd) is identical to the height of center of gravity (G) with lower surface from jut (1a) to the mounting portion from the lower surface of jut (1a).
21. as claim 19 or 20 described loudspeaker apparatus (300),
Wherein magnetic circuit (30) comprising: first flat board (7a); Be arranged on the magnet (8) on first flat board (7a); Be arranged on second flat board (7b) on the magnet (8); And yoke (9), relative with each outer peripheral wall of first flat board (7a), magnet (8) and second flat board (7b) have constant interval,
Wherein magnetic circuit (30) is arranged on the jut (1a), and
Wherein mounting portion (1bd) is positioned at and comprised on the thickness direction of magnet (8) basically on the plane at center.
22. as any one described loudspeaker apparatus (300) of claim 17 to 21,
Wherein mounting base (60) is the assembly of automobile, and
Wherein mounting portion (1bd) is installed on the mounting base (60) by fixed component (14).
CN 200510125113 2004-11-18 2005-11-18 Voice coil device and speaker device using the voice coil device Pending CN1777337A (en)

Applications Claiming Priority (4)

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JP2004334526A JP2006148447A (en) 2004-11-18 2004-11-18 Loudspeaker system
JP2004334526 2004-11-18
JP2004337402 2004-11-22
JP2004337406 2004-11-22

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CN104661161A (en) * 2013-11-21 2015-05-27 哈曼国际工业有限公司 Inverted dual coil transducer
CN111372177A (en) * 2019-11-21 2020-07-03 瑞声科技(新加坡)有限公司 Loudspeaker
CN113660584A (en) * 2021-08-20 2021-11-16 潍坊歌尔丹拿电子科技有限公司 Speaker and electronic apparatus

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WO2012129918A1 (en) * 2011-03-28 2012-10-04 苏州上声电子有限公司 Speaker vibration diaphragm and speaker
CN104661161A (en) * 2013-11-21 2015-05-27 哈曼国际工业有限公司 Inverted dual coil transducer
CN104661161B (en) * 2013-11-21 2020-01-21 哈曼国际工业有限公司 Inverted double-coil transducer
CN111372177A (en) * 2019-11-21 2020-07-03 瑞声科技(新加坡)有限公司 Loudspeaker
CN113660584A (en) * 2021-08-20 2021-11-16 潍坊歌尔丹拿电子科技有限公司 Speaker and electronic apparatus
CN113660584B (en) * 2021-08-20 2023-11-24 潍坊歌尔丹拿电子科技有限公司 Speaker and electronic device

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