CN105282666A - Miniature loudspeaker - Google Patents
Miniature loudspeaker Download PDFInfo
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- CN105282666A CN105282666A CN201510546859.7A CN201510546859A CN105282666A CN 105282666 A CN105282666 A CN 105282666A CN 201510546859 A CN201510546859 A CN 201510546859A CN 105282666 A CN105282666 A CN 105282666A
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Abstract
The invention discloses a miniature loudspeaker. The miniature loudspeaker comprises a frame, a voice diaphragm installed on the top surface of the frame; and at least one actuator connected to the frame. Each actuator comprises a vibration mechanism used for generating vibration based on an audio voltage or a current signal, and a vibration transmission mechanism which is connected with the vibration mechanism and the voice diaphragm so as to transmit the vibration generated by the vibration mechanism to the voice diaphragm, wherein the vibration mechanism comprises an armature, a voice coil and a magnetic cover; the voice coil surrounds the armature; the magnetic cover is connected to the frame, and inner sides of the upper wall and the lower wall which are parallel to each other are respectively provided with a first magnet and a second magnet; and a first tail end of the armature is connected to the magnetic cover, a second tail end of the armature is connected to the vibration transmission mechanism and is arranged between the first magnet and the second magnet, so that when the audio voltage or the current signal passes through the voice coil, the armature is dynamically magnetized and generates an acting force in the magnetic field between the first magnet and the second magnet, and the armature vibrates under the acting force.
Description
Technical field
The present invention relates to loud speaker, especially Microspeaker.
Background technology
At present, known Microspeaker can be divided three classes: the electrodynamic type Microspeaker that the first is traditional, and its principle of sound is that voice coil loudspeaker voice coil is stressed and move when tone currents is by hanging on the voice coil loudspeaker voice coil in fixed magnetic field, thus swashs tibial membrane vibration sounding.This loud speaker must have a magnetic circuit to provide power source, and the size of this magnetic circuit and the weight limits further microminiaturization of this type of loud speaker just.It two is loud speakers of piezo-electric type, and its principle of sound is that piezoelectric vibrator vibrates due to inverse piezoelectric effect and then sharp tibial membrane vibration sounding when tone currents is by piezoelectric vibrator.The current known piezo-electric type Microspeaker of restriction due to piezoelectric physical property does not also reach the performance that can be equal to mutually with electrodynamic type Microspeaker.It three is electromagnetic miniature loud speakers: its principle of sound is that armature swashs tibial membrane vibration sounding by drive rod when tone currents by the dynamic magnetic flux in armature during voice coil loudspeaker voice coil as exciting curent will be interacted with static magnetic flux in air gap thus make armature movement under force.The electromechanical conversion efficiency of electromagnetic miniature loud speaker is high more than the electromechanical conversion efficiency of electrodynamic type Microspeaker, particularly in miniature space, the low order of magnitude of energy density of the available energy density ratio electromagnetic miniature loud speaker of electrodynamic type Microspeaker.Therefore electromagnetic miniature loud speaker is very important in the prospect in Microspeaker field.But electromagnetic miniature loud speaker makes difficulty, produces difficulty compared with dynamic speaker, and there is high non-linearity, easily cause the shortcoming of distortion.
Summary of the invention
In view of the above problems, propose the present invention, to provide a kind of Microspeaker overcoming the problems referred to above or solve the problem at least in part.
According to a first aspect of the present invention, provide a kind of Microspeaker, comprising: frame; Sound film, is mounted to the top surface of frame; At least one actuator, is connected to described frame, and described actuator comprises: vibrating mechanism, for producing vibration based on audio voltage or current signal; And vibration passing mechanism, connect described vibrating mechanism and described sound film, with the vibration passing produced by described vibrating mechanism to described sound film; Wherein said vibrating mechanism comprises armature, voice coil loudspeaker voice coil and magnetic cover; Described voice coil loudspeaker voice coil is arranged around described armature; Described magnetic cover is connected to described frame, and the upper wall parallel to each other of described magnetic cover and the inner side of lower wall are respectively arranged with the first magnet and the second magnet; First end of described armature is connected to described magnetic cover, second end of described armature is connected to described vibration passing mechanism and is arranged between described first magnet and described second magnet, make when audio voltage or current signal are by described voice coil loudspeaker voice coil, described armature produces active force in the magnetic field by dynamic magnetization and between described first magnet and described second magnet, and described armature produces vibration under described active force.
In above-mentioned exemplary embodiment of the present invention, described magnetic cover is rectangle and comprises described upper wall, described lower wall, the first side wall and the second sidewall, and the outside of described upper wall is connected to the basal surface of described frame.
In above-mentioned arbitrary exemplary embodiment of the present invention, described armature, described voice coil loudspeaker voice coil are arranged in described magnetic cover, described armature is set to be parallel to described upper wall, and the first end of described armature and the second end extend respectively and be connected to described the first side wall and described second sidewall; One end of described vibration passing mechanism is connected on the second end of described armature, and the other end upwards extends abutting to sound film through described upper wall.
In above-mentioned arbitrary exemplary embodiment of the present invention, described first magnet is connected to described upper wall and described the first side wall, and described second magnet is connected to described lower wall and described the first side wall.
In above-mentioned arbitrary exemplary embodiment of the present invention, described magnetic cover comprises the first cover body and the second cover body; Described first cover body is U-shaped and comprises the first side shield and be vertically connected to the first overhead gage and first lower baffle plate at described first side shield two ends respectively; Described second cover body is U-shaped and comprises the second side shield and be vertically connected to the second overhead gage and second lower baffle plate at described second side shield two ends respectively; The length of described second side shield is less than the length of described first side shield, and between the first overhead gage of described first cover body of described second cover body embedding and the first lower baffle plate, to form the described magnetic cover of rectangle.
In above-mentioned arbitrary exemplary embodiment of the present invention, first end of described armature extends and is connected to the first side shield of described first cover body, described second end extends and is connected to the second side shield of described second cover body, and described first magnet is connected to the second overhead gage and second side shield of the second cover body, described second magnet is connected to the second lower baffle plate of described second cover body and described second side shield.
In above-mentioned arbitrary exemplary embodiment of the present invention, the first overhead gage of described first cover body comprises the first through hole, and the other end of described vibration passing mechanism upwards extends abutting to sound film through described first through hole.
In above-mentioned arbitrary exemplary embodiment of the present invention, described actuator also comprises a spring and props up sheet, described second cover body is provided with the second through hole, one end that described spring props up sheet is connected with the second end of described armature through this second through hole, and the other end that this spring props up sheet is fixed on the basal surface in frame.
In above-mentioned arbitrary exemplary embodiment of the present invention, it is that non magnetic spring props up sheet that described spring props up sheet.
In above-mentioned arbitrary exemplary embodiment of the present invention, described actuator is two, and these two actuators are symmetrically distributed on the length direction of frame.
In above-mentioned arbitrary exemplary embodiment of the present invention, described actuator is four, and wherein two actuators are symmetrically distributed on the length direction of frame, and another two are symmetrically distributed on the Width of frame.
In above-mentioned arbitrary exemplary embodiment of the present invention, described magnetic cover is the cylindrical shell of hollow, and is connected to the side surface of described frame along the axis direction of described cylindrical shell, and the upper wall of described magnetic cover and lower wall are parallel with basal surface with the top surface of described frame respectively.
In above-mentioned arbitrary exemplary embodiment of the present invention, described armature be U-shaped and comprise be provided with described first end upper part, be provided with described second end and the lower part parallel with described upper part, and respectively perpendicular to the lateral parts of described upper part and lower part, the inner side of described upper part is connected to the outside of the upper wall of described magnetic cover, and the outside of described upper part flushes with the top surface of described frame.
In above-mentioned arbitrary exemplary embodiment of the present invention, the lower part that described voice coil loudspeaker voice coil is wound in described armature is fixedly connected with the lower part of described armature.
In above-mentioned arbitrary exemplary embodiment of the present invention, described vibration passing mechanism is riveted to the second end of described armature.
In above-mentioned arbitrary exemplary embodiment of the present invention, described actuator is two, and these two actuators are connected on two side surfaces of described frame symmetrically.
In above-mentioned arbitrary exemplary embodiment of the present invention, described actuator is four, and wherein two actuators are symmetrically distributed on a side surface of frame, and another two actuators are symmetrically distributed on another side surface of frame.
In above-mentioned arbitrary exemplary embodiment of the present invention, the lower part of described armature is arranged between described first magnet and described second magnet, and there is working gas gap between described first magnet and described lower part and between described second magnet and described lower part.
In above-mentioned arbitrary exemplary embodiment of the present invention, described vibration passing mechanism is sound film drive rod, is provided with cavity, is provided with damping piece in this cavity in described sound film drive rod, and described sound film drive rod outer surface is provided with damping layer.
In above-mentioned arbitrary exemplary embodiment of the present invention, described voice coil loudspeaker voice coil to be wound on described armature and to be fixedly connected with described armature.
In above-mentioned arbitrary exemplary embodiment of the present invention, described voice coil loudspeaker voice coil is arranged vacantly around described armature, and is fixedly connected with described magnetic cover.
In above-mentioned arbitrary exemplary embodiment of the present invention, described sound film drive rod is non magnetic drive rod.
In above-mentioned arbitrary exemplary embodiment of the present invention, described sound film drive rod one end and armature are riveted other end complications and to be extended afterwards and the symmetrical centre place of sound film is connected mutually.
In above-mentioned arbitrary exemplary embodiment of the present invention, the described sound film drive rod of two actuators and the connection form of sound film are is symmetry with the symmetrical centre of sound film.
In above-mentioned arbitrary exemplary embodiment of the present invention, the described sound film drive rod of four actuators and the connection form of sound film are is symmetry with the symmetrical centre of sound film.
The invention provides above-mentioned Microspeaker.According to embodiments of the invention, the electromechanical conversion coefficient of Microspeaker significantly improves, it is 5 to 10 times of the electromechanical conversion coefficient of conventional electric formula Microspeaker, the vibration amplitude solving piezoelectric ceramic Microspeaker is too small, overcomes the problem that the electromechanical conversion efficiency of electrodynamic type Microspeaker is on the low side, and structure is simple, compact, achieve loud speaker long narrow and microminiaturized, in addition, Microspeaker is easily produced, assembles, is dismantled according to an embodiment of the invention, is convenient to safeguard.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of specification, and can become apparent, below especially exemplified by the specific embodiment of the present invention to allow above and other objects of the present invention, feature and advantage.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 is Microspeaker structural representation according to an exemplary embodiment of the present invention;
Fig. 2 is Microspeaker structural representation according to an exemplary embodiment of the present invention;
Fig. 3 is actuator structure schematic diagram according to an exemplary embodiment of the present invention;
Fig. 4 is the Microspeaker structural representation according to an exemplary embodiment of the present invention with two actuators;
Fig. 5 a is Microspeaker structural representation according to an exemplary embodiment of the present invention;
Fig. 5 b is the structural representation of magnetic cover according to an exemplary embodiment of the present invention;
Fig. 6 is the Microspeaker structural representation according to an exemplary embodiment of the present invention with two actuators.
Embodiment
Below with reference to accompanying drawings exemplary embodiment of the present disclosure is described in more detail.Although show exemplary embodiment of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the embodiment set forth here.On the contrary, provide these embodiments to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
Fig. 1-3 shows the schematic diagram of the Microspeaker according to the embodiment of the present invention.
As depicted in figs. 1 and 2, Microspeaker, comprising: frame 100; Sound film 200, is mounted to the top surface of frame; And at least one actuator 300, be connected to described frame 100.Alternatively, this frame 100 is cavity shape, is enclosed to connect to form by multiple sidewall, the shape adaptation of sidewall and actuator 300.Alternatively, sound film 200 is provided with damping sheet 210, there is certain rigidity.
As shown in Figures 2 and 3, described actuator 300 comprises: vibrating mechanism 310, for producing vibration based on audio voltage or current signal; And vibration passing mechanism 319, connect described vibrating mechanism 310 and described sound film 200, with the vibration passing produced by described vibrating mechanism 310 to described sound film 200; Wherein said vibrating mechanism 310 comprises armature 312, voice coil loudspeaker voice coil 311 and magnetic cover 320; Described voice coil loudspeaker voice coil 311 is arranged around described armature 312; Described magnetic cover 320 is connected to described frame 100, and the upper wall 320a parallel to each other of described magnetic cover 320 and the inner side of lower wall 320b are respectively arranged with the first magnet 315a and the second magnet 315b; First end 312a of described armature 312 is connected to described magnetic cover 320, second end 312b of described armature 312 is connected to described vibration passing mechanism 319 and is arranged between described first magnet 315a and described second magnet 315b, make when audio voltage or current signal are by described voice coil loudspeaker voice coil 311, described armature 312 produces active force in the magnetic field by dynamic magnetization and between described first magnet 315a and described second magnet 315b, and described armature 312 produces vibration under described active force.Alternatively, in process of production, the thickness of described loud speaker can be made to reduce as much as possible, to reduce the volume of Microspeaker.Alternatively, actuator 300 also can have other structures, as shown in Figure 5, will describe in detail later.
In an exemplary embodiment of the present invention, described magnetic cover 320 is rectangle and comprises described upper wall 320a, described lower wall 320b, the first side wall 320c and the second sidewall 320d, and the outside of described upper wall 320a is connected to the basal surface of described frame 100.Alternatively, described magnetic cover 320 also can be other shapes, such as trapezoidal or comprise the irregularly shaped of parallel upper wall 320a and lower wall 320b.
In an exemplary embodiment of the present invention, as shown in Figure 3, wherein said armature 312, described voice coil loudspeaker voice coil 311 are arranged in described magnetic cover 320, described armature 312 is set to be parallel to described upper wall 320a, and the first end 312a of described armature 312 and the second end 312b extends respectively and is connected to described the first side wall 320c and described second sidewall 320d; One end of described vibration passing mechanism 319 is connected on the second end 312b of described armature 312, and the other end upwards extends abutting to sound film 200 through described upper wall 320a.Alternatively, one end of vibration passing mechanism 319 also can be connected on the first end 312a of described armature 312.
In an exemplary embodiment of the present invention, described voice coil loudspeaker voice coil 311 to be wound on described armature 312 and to be fixedly connected with described armature.
In an exemplary embodiment of the present invention, described voice coil loudspeaker voice coil 311 is arranged vacantly around described armature 312, and is fixedly connected with described magnetic cover 320.
In an exemplary embodiment of the present invention, as shown in Figure 3, described first magnet 315a is connected to described upper wall 320a and described second sidewall 320d, and described second magnet is connected to described lower wall 320b and described second sidewall 320d.Alternatively, when on the first end 312a that one end of vibration passing mechanism 319 is connected to described armature 312, described first magnet 315a can be connected to described upper wall 320a and described the first side wall 320c, and described second magnet is connected to described lower wall 320b and described the first side wall 320c.
In an exemplary embodiment of the present invention, wherein said magnetic cover 320 comprises the first cover body 313 and the second cover body 314; Described first cover body 313 is U-shaped and comprises the first side shield 313a and be vertically connected to the first overhead gage 313b and the first lower baffle plate 313c at described first side shield two ends respectively; Described second cover body 314 is U-shaped and comprises the second side shield 314a and be vertically connected to the second overhead gage 314b and the second lower baffle plate 314c at described second side shield two ends respectively; The length of described second side shield 314a is less than the length of described first side shield 313a, and between described second cover body 314 the first overhead gage 313b of embedding described first cover body 313 and the first lower baffle plate 313c, to form the described magnetic cover 320 of rectangle, as shown in Figures 2 and 3.
Alternatively, as shown in Figure 2, first overhead gage 313b and the second overhead gage 314b forms the upper wall 320a of magnetic cover 320, first lower baffle plate 313c and the second lower baffle plate 314c forms the lower wall 320b of magnetic cover 320, first side shield 313a forms the first side wall 320c of magnetic cover 320, and the second side shield 314a forms the second sidewall 320d of magnetic cover 320.Alternatively, the length of described second side shield 314a also can be greater than the length of described first side shield 313a, and between the described first cover body 313 second overhead gage 314b that can embed described second cover body 314 and the second lower baffle plate 314c, to form the described magnetic cover 320 of rectangle.This structure of magnetic cover, makes its structure simple, when safeguarding, easily dismantling and easily re-assemblying, reduce cost and improve operating efficiency.
In an exemplary embodiment of the present invention, as shown in Figure 3, first end 312a of described armature 312 extends and is connected to the first side shield 313a of described first cover body 313, described second end 312b extends and is connected to the second side shield 314a of described second cover body 314, and described first magnet 315a is connected to the second overhead gage 314b and the second side shield 314a of the second cover body 314, described second magnet 315b is connected to the second lower baffle plate 314c of described second cover body 314 and described second side shield 314a.This set that magnet is connected respectively by two baffle plates with cover body, makes the connection between itself and magnetic cover more firm, reduces the possibility of distortion, improve the performance of Microspeaker.
In an exemplary embodiment of the present invention, the first overhead gage 313b of described first cover body 313 comprises the first through hole 316, and the other end of described vibration passing mechanism 319 upwards extends abutting to sound film 200 through described first through hole 316.Alternatively, vibration passing mechanism 319 also can be abutted to sound film 200 by the through hole being arranged on other positions, such as, through hole on the second side shield 314a.
In an exemplary embodiment of the present invention, actuator 300 also comprises a spring and props up sheet 317, second magnetic cover 314 is provided with the second through hole 318, one end that spring props up sheet 317 is connected with the other end of armature 312 through this second through hole 318, and the other end that this spring props up sheet 317 is fixed on the bottom of frame 100.This spring props up sheet 317 for supporting armature 312, and limits armature 312 and move on the length direction of frame 100, starts position-limiting action.
In an exemplary embodiment of the present invention, this spring props up sheet 317 and selects nonmagnetic substance, for non magnetic spring props up sheet.
In an exemplary embodiment of the present invention, as shown in Figure 4, described actuator is two, and these two actuators are symmetrically distributed on the length direction of frame 100.The concrete structure of each actuator 300 include based on the vibrative vibrating mechanism of audio signal 310 and by above-mentioned vibration passing to the vibration passing mechanism 319 of sound film 200, vibrating mechanism 310 comprises voice coil loudspeaker voice coil 311 equally, armature 312, first cover body 313 and the second cover body 314, first cover body 313 and the second cover body 314 are connected to form a rectangular shaped rim, same second cover body 314 is provided with two pieces of magnet 315a, 315b, this first cover body 313 offers the first through hole, voice coil loudspeaker voice coil 311, armature 312 is positioned at this rectangle magnetic cover, same, voice coil loudspeaker voice coil 311 to be wound on armature 312 and to be fixedly connected with armature 312, the madial wall other end that one end of armature 312 connects the first cover body 313 connects the madial wall of the second cover body 314, one end of vibration passing mechanism is connected on armature 312, the other end upwards extends abutting to sound film through the first through hole from armature 312, said structure is identical with embodiment one, second cover body 314 of one of them actuator 300 is near the second cover body 314 of another actuator 300, two the first cover bodies 313 away from each other, complete symmetry.In the present embodiment, there is Liang Ge vibration passing mechanism be accordingly connected with sound film.In addition, in the present embodiment, the second cover body 314 can arrange the second through hole, therefore props up sheet without the need to increasing spring.Alternatively, each actuator can have the structure similar to actuator 300 as Figure 1-3, in order to concise and to the point object, does not repeat them here.By arranging two actuators, make two actuators act on sound film, the vibration force suffered by sound film is also just larger, thus improves the electromechanical conversion efficiency of Microspeaker simultaneously.
In an exemplary embodiment of the present invention, described actuator is four, and wherein two actuators are symmetrically distributed on the length direction of frame 100, and another two are symmetrically distributed on the Width of frame 100.Alternatively, the second cover body can arranging the second through hole, propping up sheet without the need to increasing spring.Alternatively, each actuator can have the structure similar to actuator 300 as Figure 1-3, in order to concise and to the point object, does not repeat them here.By arranging four actuators, make four actuators act on sound film, the vibration force suffered by sound film is also just larger, thus further increases the electromechanical conversion efficiency of Microspeaker simultaneously.
Below with reference to Fig. 5 a and 5b, illustrate the Microspeaker according to another exemplary embodiment of the present invention.
As shown in Figure 5 a, Microspeaker, comprising: frame 100; Sound film 200, is mounted to the top surface of frame; And at least one actuator 400, be connected to described frame 100.
Described actuator comprises 400: vibrating mechanism 410, for producing vibration based on audio voltage or current signal; And vibration passing mechanism 419, connect described vibrating mechanism 410 and described sound film 200, with the vibration passing produced by described vibrating mechanism 410 to described sound film 200;
Wherein said vibrating mechanism 410 comprises armature 412, voice coil loudspeaker voice coil 411 and magnetic cover 420; Described voice coil loudspeaker voice coil 411 is arranged around described armature 412; Described magnetic cover 420 is connected to described frame 100, and the upper wall 420a parallel to each other of described magnetic cover 420 and the inner side of lower wall 420b are respectively arranged with the first magnet 415a and the second magnet 415b; First end 412a of described armature 412 is connected to described magnetic cover 420, second end 412b of described armature 412 is connected to described vibration passing mechanism 419 and is arranged between described first magnet 415a and described second magnet 415b, make when audio voltage or current signal are by described voice coil loudspeaker voice coil 411, described armature 412 produces active force in the magnetic field by dynamic magnetization and between described first magnet 415a and described second magnet 415b, and described armature 412 produces vibration under described active force.Alternatively, sound film 200 is provided with damping sheet, there is certain rigidity.
In an exemplary embodiment of the present invention, as shown in Figure 5 b, described magnetic cover 420 is the cylindrical shell of hollow, and be connected to the side surface of described frame 100 along the axis direction of described cylindrical shell, and the upper wall 420a of described magnetic cover 420 and lower wall 420b are parallel with basal surface with the top surface of described frame 100 respectively.Microspeaker, by arranging the magnetic cover of this structure, can make the thickness of described loud speaker reduce as much as possible, to reduce the volume of Microspeaker.
In an exemplary embodiment of the present invention, as shown in figure 5a and 5b, described armature be U-shaped and comprise be provided with described first end 412a upper part 412c, be provided with described second end 412b and the lower part 412d parallel with described upper part 412c, and respectively perpendicular to the lateral parts 412e of described upper part 412c and lower part 412d, the inner side of described upper part 412c is connected to the outside of the upper wall 420a of described magnetic cover 420, and the outside of described upper part 412c flushes with the top surface of described frame 100.
In an exemplary embodiment of the present invention, as shown in Figure 5 a, wherein said voice coil loudspeaker voice coil 411 be wound in described armature 412 lower part 412d on and be fixedly connected with the lower part 412d of described armature 412.
In an exemplary embodiment of the present invention, described voice coil loudspeaker voice coil 411 also can not contact with described armature 412 and connect, but arranges vacantly around described armature 412, and is fixedly connected with described magnetic cover 420.
In an exemplary embodiment of the present invention, described vibration passing mechanism 419 is riveted to the second end 412b of described armature 412.Alternatively, described vibration passing mechanism 419 also to be otherwise connected to the second end 412b of described armature 412, such as, can bond.
In an exemplary embodiment of the present invention, the lower part 412b of described armature 412 is arranged between described first magnet 415a and described second magnet 415b, and there is working gas gap between described first magnet 415a and described lower part 412b and between described second magnet 415b and described lower part 412b.
In an exemplary embodiment of the present invention, described vibration passing mechanism 419 is sound film drive rod, is provided with cavity, is provided with damping piece in this cavity in described sound film drive rod, and described sound film drive rod outer surface is provided with damping layer.
In an exemplary embodiment of the present invention, described sound film drive rod is non magnetic drive rod.
In an exemplary embodiment of the present invention, described sound film drive rod one end and armature 412 are riveted other end complications and to be extended afterwards and the symmetrical centre place of sound film 200 is connected mutually.
In an exemplary embodiment of the present invention, as shown in Figure 6, described actuator 400 is two, and these two actuators 400 are connected on two side surfaces of described frame 100 symmetrically.In an exemplary embodiment of the present invention, the described sound film drive rod of two actuators 400 and the connection form of sound film are is symmetry with the symmetrical centre of sound film.Alternatively, each actuator 400 can have the structure similar to actuator as shown in Figure 5, in order to concise and to the point object, does not repeat them here.By arranging two actuators, make two actuators 400 act on sound film, the vibration force suffered by sound film is also just larger, thus improves the electromechanical conversion efficiency of Microspeaker simultaneously.
In an exemplary embodiment of the present invention, described actuator 400 is four, and wherein two actuators are symmetrically distributed on a side surface of frame, and another two actuators are symmetrically distributed on another side surface of frame.In an exemplary embodiment of the present invention, the described sound film drive rod of four actuators and the connection form of sound film are is symmetry with the symmetrical centre of sound film.Alternatively, each actuator can have the structure similar to actuator as shown in Figure 5, in order to concise and to the point object, does not repeat them here.By arranging four actuators, make four actuators act on sound film, the vibration force suffered by sound film is also just larger, thus further increases the electromechanical conversion efficiency of Microspeaker simultaneously.
In a word, the invention provides above-mentioned Microspeaker.According to embodiments of the invention, the electromechanical conversion coefficient of Microspeaker significantly improves, it is 5 to 10 times of the electromechanical conversion coefficient of conventional electric formula Microspeaker, the vibration amplitude solving piezoelectric ceramic Microspeaker is too small, overcomes the problem that the electromechanical conversion efficiency of electrodynamic type Microspeaker is on the low side, and structure is simple, compact, achieve loud speaker long narrow and microminiaturized, in addition, Microspeaker is easily produced, assembles, is dismantled according to an embodiment of the invention, is convenient to safeguard.
In specification provided herein, describe a large amount of detail.But can understand, embodiments of the invention can be put into practice when not having these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Similarly, be to be understood that, in order to simplify the disclosure and to help to understand in each inventive aspect one or more, in the description above to exemplary embodiment of the present invention, each feature of the present invention is grouped together in single embodiment, figure or the description to it sometimes.Or rather, as the following claims reflect, all features of inventive aspect disclosed single embodiment before being to be less than.Therefore, the claims following embodiment are incorporated to this embodiment thus clearly, and wherein each claim itself is as independent embodiment of the present invention.
In addition, those skilled in the art can understand, although to comprise in other embodiment some included feature instead of further feature in this some embodiments, the combination of the feature of different embodiment means and to be within scope of the present invention and to form different embodiments.Such as, in detail in the claims, the one of any of embodiment required for protection can use with arbitrary compound mode.
The present invention will be described instead of limit the invention to it should be noted above-described embodiment, and those skilled in the art can design alternative embodiment when not departing from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and does not arrange element in the claims or step.Word "a" or "an" before being positioned at element is not got rid of and be there is multiple such element.The present invention can by means of including the hardware of some different elements and realizing by means of the computer of suitably programming.In the unit claim listing some devices, several in these devices can be carry out imbody by same hardware branch.Word first, second and third-class use do not represent any order.Can be title by these word explanations.
Claims (10)
1. Microspeaker, comprising:
Frame;
Sound film, is mounted to the top surface of frame;
At least one actuator, is connected to described frame, and described actuator comprises:
Vibrating mechanism, for producing vibration based on audio voltage or current signal; And
Vibration passing mechanism, connects described vibrating mechanism and described sound film, with the vibration passing produced by described vibrating mechanism to described sound film;
Wherein said vibrating mechanism comprises armature, voice coil loudspeaker voice coil and magnetic cover; Described voice coil loudspeaker voice coil is arranged around described armature; Described magnetic cover is connected to described frame, and the upper wall parallel to each other of described magnetic cover and the inner side of lower wall are respectively arranged with the first magnet and the second magnet; First end of described armature is connected to described magnetic cover, second end of described armature is connected to described vibration passing mechanism and is arranged between described first magnet and described second magnet, make when audio voltage or current signal are by described voice coil loudspeaker voice coil, described armature produces active force in the magnetic field by dynamic magnetization and between described first magnet and described second magnet, and described armature produces vibration under described active force.
2. Microspeaker as claimed in claim 1, wherein said magnetic cover is rectangle and comprises described upper wall, described lower wall, the first side wall and the second sidewall, and the outside of described upper wall is connected to the basal surface of described frame.
3. Microspeaker as claimed in claim 2, wherein said armature, described voice coil loudspeaker voice coil are arranged in described magnetic cover, described armature is set to be parallel to described upper wall, and the first end of described armature and the second end extend respectively and be connected to described the first side wall and described second sidewall; One end of described vibration passing mechanism is connected on the second end of described armature, and the other end upwards extends abutting to sound film through described upper wall.
4. Microspeaker as claimed in claim 2 or claim 3, wherein said first magnet is connected to described upper wall and described the first side wall, and described second magnet is connected to described lower wall and described the first side wall.
5. Microspeaker as claimed in claim 2, wherein said magnetic cover comprises the first cover body and the second cover body; Described first cover body is U-shaped and comprises the first side shield and be vertically connected to the first overhead gage and first lower baffle plate at described first side shield two ends respectively; Described second cover body is U-shaped and comprises the second side shield and be vertically connected to the second overhead gage and second lower baffle plate at described second side shield two ends respectively; The length of described second side shield is less than the length of described first side shield, and between the first overhead gage of described first cover body of described second cover body embedding and the first lower baffle plate, to form the described magnetic cover of rectangle.
6. Microspeaker as claimed in claim 5, first end of wherein said armature extends and is connected to the first side shield of described first cover body, described second end extends and is connected to the second side shield of described second cover body, and described first magnet is connected to the second overhead gage and second side shield of the second cover body, described second magnet is connected to the second lower baffle plate of described second cover body and described second side shield.
7. Microspeaker as claimed in claim 5, the first overhead gage of wherein said first cover body comprises the first through hole, and the other end of described vibration passing mechanism upwards extends abutting to sound film through described first through hole.
8. Microspeaker as claimed in claim 5, it is characterized in that, described actuator also comprises a spring and props up sheet, described second cover body is provided with the second through hole, one end that described spring props up sheet is connected with the second end of described armature through this second through hole, and the other end that this spring props up sheet is fixed on the basal surface in frame.
9. Microspeaker as claimed in claim 8, it is characterized in that, it is that non magnetic spring props up sheet that described spring props up sheet.
10. Microspeaker as claimed in claim 2, it is characterized in that, described actuator is two, and these two actuators are symmetrically distributed on the length direction of frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510546859.7A CN105282666B (en) | 2015-08-28 | 2015-08-28 | Microspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510546859.7A CN105282666B (en) | 2015-08-28 | 2015-08-28 | Microspeaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105282666A true CN105282666A (en) | 2016-01-27 |
| CN105282666B CN105282666B (en) | 2019-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510546859.7A Active CN105282666B (en) | 2015-08-28 | 2015-08-28 | Microspeaker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108668209A (en) * | 2017-04-01 | 2018-10-16 | 李培胜 | A kind of modularity function superminiature electroacoustic transducer |
| WO2022021820A1 (en) * | 2020-07-31 | 2022-02-03 | 华为技术有限公司 | Loudspeaker and electronic device |
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| JP2005236844A (en) * | 2004-02-23 | 2005-09-02 | Star Micronics Co Ltd | Electroacoustic transducer |
| CN101043765A (en) * | 2006-03-24 | 2007-09-26 | 日本胜利株式会社 | Narrow speaker unit and image display apparatus |
| CN102187689A (en) * | 2008-08-29 | 2011-09-14 | 宾夕法尼亚州研究基金会 | Methods and apparatus for reduced distortion balanced armature devices |
| CN205123986U (en) * | 2015-08-28 | 2016-03-30 | 国光电器股份有限公司 | Micro loudspeaker |
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- 2015-08-28 CN CN201510546859.7A patent/CN105282666B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005236844A (en) * | 2004-02-23 | 2005-09-02 | Star Micronics Co Ltd | Electroacoustic transducer |
| CN101043765A (en) * | 2006-03-24 | 2007-09-26 | 日本胜利株式会社 | Narrow speaker unit and image display apparatus |
| CN102187689A (en) * | 2008-08-29 | 2011-09-14 | 宾夕法尼亚州研究基金会 | Methods and apparatus for reduced distortion balanced armature devices |
| CN205123986U (en) * | 2015-08-28 | 2016-03-30 | 国光电器股份有限公司 | Micro loudspeaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108668209A (en) * | 2017-04-01 | 2018-10-16 | 李培胜 | A kind of modularity function superminiature electroacoustic transducer |
| WO2022021820A1 (en) * | 2020-07-31 | 2022-02-03 | 华为技术有限公司 | Loudspeaker and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105282666B (en) | 2019-01-01 |
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