CN105282666B - Microspeaker - Google Patents
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- CN105282666B CN105282666B CN201510546859.7A CN201510546859A CN105282666B CN 105282666 B CN105282666 B CN 105282666B CN 201510546859 A CN201510546859 A CN 201510546859A CN 105282666 B CN105282666 B CN 105282666B
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Abstract
The invention discloses a kind of Microspeakers, comprising: frame；Sound film is installed to the top surface of frame；At least one actuator is connected to frame, and actuator includes: vibrating mechanism, for generating vibration based on audio voltage or current signal；And vibration transmission mechanism, it connects vibrating mechanism and sound film, the vibration that vibrating mechanism is generated is transferred to sound film；Wherein vibrating mechanism includes armature, voice coil and magnetic cover；Voice coil is arranged around armature；Magnetic cover is connected to frame, is respectively arranged with the first magnet and the second magnet on the inside of the upper wall and lower wall parallel to each other of magnetic cover；The first end of armature is connected to magnetic cover, the second end of armature is connected to vibration transmission mechanism and is arranged between the first magnet and the second magnet, so that when audio voltage or current signal pass through voice coil, armature generates active force in the magnetic field by dynamic magnetization and between the first magnet and the second magnet, armature generates vibration under active force.
Description
Technical field
The present invention relates to loudspeakers, especially Microspeaker.
Background technique
Currently, well known Microspeaker can be divided into three classes: one is traditional electrodynamic type Microspeaker, sounding is former
Reason be when tone currents is by hanging on the voice coil in fixed magnetic field, voice coil stress and move, thus swash tibial membrane vibration hair
Sound.This loudspeaker must have a magnetic circuit to provide power source, and the size and weight of exactly this magnetic circuit limit such loudspeaker
Further micromation.The second is the loudspeaker of piezo-electric type, principle of sound is when tone currents passes through piezoelectric vibrator, piezoelectricity vibration
Son is vibrated due to inverse piezoelectric effect and then swashs tibial membrane vibration sounding.Since the limitation of piezoelectric material physical property is currently known
Piezo-electric type Microspeaker the performance that can be mutually equal to electrodynamic type Microspeaker has not been reached yet.The third is electromagnetism declines
Type loudspeaker: its principle of sound is that the dynamic magnetic flux when tone currents passes through voice coil as excitation current in armature will be with gas
Static magnetic flux interaction is so that armature movement under force, armature swash tibial membrane vibration sounding by drive rod in gap.Electromagnetism
The electromechanical conversion efficiency of formula Microspeaker is high more than the electromechanical conversion efficiency of electrodynamic type Microspeaker, especially in miniature sky
Between in, the low quantity of energy density of the available energy density ratio electromagnetic miniature loudspeaker of electrodynamic type Microspeaker
Grade.Therefore prospect of the electromagnetic miniature loudspeaker in Microspeaker field is very important.However electromagnetic miniature loudspeaker with
The shortcomings that dynamic speaker is compared to making difficult, production difficulty, and having high non-linearity, be easy to cause distortion.
Summary of the invention
In view of the above problems, the present invention is proposed, overcome the above problem in order to provide one kind or at least is partially solved
The Microspeaker of the above problem.
According to the present invention in a first aspect, providing a kind of Microspeaker, comprising: frame；Sound film, installation to frame
Top surface；At least one actuator is connected to the frame, and the actuator includes: vibrating mechanism, for being based on audio voltage
Or current signal generates vibration；And vibration transmission mechanism, the vibrating mechanism and the sound film are connected, by the bobbing machine
The vibration that structure generates is transferred to the sound film；Wherein the vibrating mechanism includes armature, voice coil and magnetic cover；The voice coil surrounds institute
It states armature and is arranged；The magnetic cover is connected to the frame, divides on the inside of the upper wall and lower wall parallel to each other of the magnetic cover
It is not provided with the first magnet and the second magnet；The first end of the armature is connected to the magnetic cover, the second end of the armature
End is connected to the vibration transmission mechanism and is arranged between first magnet and second magnet, so that working as audio voltage
Or current signal pass through the voice coil when, the armature is by dynamic magnetization and between first magnet and second magnet
Magnetic field in generate active force, the armature generates vibration under the active force.
In the above exemplary embodiments of the invention, the magnetic cover is rectangle and including the upper wall, the lower wall, the
One side wall and second sidewall are connected to the bottom surface of the frame on the outside of the upper wall.
In any of the above-described exemplary embodiments of the invention, the armature, the voice coil are arranged in the magnetic cover, institute
It states armature and is arranged in parallel to the upper wall, the first end and second end of the armature each extend over and be connected to described
One side wall and the second sidewall；One end of the vibration transmission mechanism is connected in the second end of the armature, the other end
Abutting is upwardly extended to sound film across the upper wall.
In any of the above-described exemplary embodiments of the invention, first magnet is connected to the upper wall and described first
Side wall, second magnet are connected to the lower wall and the first side wall.
In any of the above-described exemplary embodiments of the invention, the magnetic cover includes the first cover and the second cover；It is described
First cover is to keep off on U-shaped and including the first side baffle and with being respectively perpendicular being connected to the first side block board ends first
Plate and the first lower baffle plate；Second cover is U-shaped and including the second side baffle and with being respectively perpendicular is connected to described second
The second overhead gage and the second lower baffle plate of side block board ends；The length of second side baffle is less than the length of first side baffle
Degree, and second cover is embedded between the first overhead gage and the first lower baffle plate of first cover, to constitute the institute of rectangle
State magnetic cover.
In any of the above-described exemplary embodiments of the invention, the first end of the armature extends and connected to described
First side baffle of one cover, the second end extend and connected to the second side baffle of second cover and described
First magnet is connected to the second overhead gage and the second side baffle of the second cover, and second magnet is connected to second cover
The second lower baffle plate and second side baffle.
In any of the above-described exemplary embodiments of the invention, the first overhead gage of first cover includes first logical
Hole, the other end of the vibration transmission mechanism pass through the first through hole and upwardly extend abutting to sound film.
In any of the above-described exemplary embodiments of the invention, the actuator further includes a spring branch piece, and described second
Cover is equipped with the second through-hole, and one end of the spring branch piece passes through second through-hole and connect with the second end of the armature,
The other end of the spring branch piece is fixed on the bottom surface in frame.
In any of the above-described exemplary embodiments of the invention, the spring branch piece is non magnetic spring branch piece.
In any of the above-described exemplary embodiments of the invention, the actuator is two, which symmetrically divides
It is distributed on the length direction of frame.
In any of the above-described exemplary embodiments of the invention, the actuator is four, and two of them actuator is symmetrical
It is distributed on the length direction of frame, another two is symmetrically distributed in the width direction of frame.
In any of the above-described exemplary embodiments of the invention, the magnetic cover is hollow cylinder, and along the cylinder
Axis direction be connected to the side surface of the frame, and the upper wall of the magnetic cover and the lower wall top surface with the frame respectively
It is parallel with bottom surface.
In any of the above-described exemplary embodiments of the invention, the armature is U-shaped and including being provided with first end
The upper part at end is provided with the second end and the lower part parallel with the upper part, and is respectively perpendicular on described
The lateral parts of part and lower part are connected to the outside of the upper wall of the magnetic cover, and the top on the inside of the upper part
The outside divided is flushed with the top surface of the frame.
In any of the above-described exemplary embodiments of the invention, the voice coil be wound on the lower part of the armature and with
The lower part of the armature is fixedly connected.
In any of the above-described exemplary embodiments of the invention, the vibration transmission mechanism is riveted to the second of the armature
End.
In any of the above-described exemplary embodiments of the invention, the actuator is two, and two actuators are symmetrically
It is connected on two side surfaces of the frame.
In any of the above-described exemplary embodiments of the invention, the actuator is four, and two of them actuator is symmetrical
It is distributed on a side surface of frame, another two actuator is symmetrically distributed on another side surface of frame.
In any of the above-described exemplary embodiments of the invention, the lower part of the armature set up separately set in first magnet and
Between second magnet, and point between first magnet and the lower part and second magnet and the lower part
Between there are working gas gaps.
In any of the above-described exemplary embodiments of the invention, the vibration transmission mechanism is sound film drive rod, the sound
It is equipped with cavity in film drive rod, damping piece is equipped in the cavity, the sound film driving rod outer surface is equipped with damping layer.
In any of the above-described exemplary embodiments of the invention, the voice coil be wound on the armature and with the armature
It is fixedly connected.
In any of the above-described exemplary embodiments of the invention, the voice coil is vacantly arranged around the armature, and with
The magnetic cover is fixedly connected.
In any of the above-described exemplary embodiments of the invention, the sound film drive rod is non magnetic drive rod.
In any of the above-described exemplary embodiments of the invention, described sound film drive rod one end and the armature riveting other end are bent
Folding extend after be fixedly connected at the symmetrical centre of sound film.
In any of the above-described exemplary embodiments of the invention, the company of the sound film drive rod and sound film of two actuators
It is symmetrical that connect form, which be with the symmetrical centre of sound film,.
In any of the above-described exemplary embodiments of the invention, the company of the sound film drive rod and sound film of four actuators
It is symmetrical that connect form, which be with the symmetrical centre of sound film,.
The present invention provides above-mentioned Microspeakers.According to an embodiment of the invention, the electromechanical transformation system of Microspeaker
Number significantly improves, and is 5 to 10 times of the electromechanical conversion coefficient of traditional electrodynamic type Microspeaker, it is miniature to solve piezoelectric ceramics
The vibration amplitude of loudspeaker is too small, overcomes the problems, such as that the electromechanical conversion efficiency of electrodynamic type Microspeaker is relatively low, and structure letter
It is single, compact, realize loudspeaker it is long narrow and micromation, in addition, embodiment according to the present invention Microspeaker be easy production,
Assembling, disassembly, it is convenient for safeguarding.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the Microspeaker structural schematic diagram according to exemplary embodiment of the present；
Fig. 2 is the Microspeaker structural schematic diagram according to exemplary embodiment of the present；
Fig. 3 is the actuator structure schematic diagram according to exemplary embodiment of the present；
Fig. 4 is there are two the Microspeaker structural schematic diagrams of actuator according to the tool of exemplary embodiment of the present；
Fig. 5 a is the Microspeaker structural schematic diagram according to exemplary embodiment of the present；
Fig. 5 b is the structural schematic diagram according to the magnetic cover of exemplary embodiment of the present；
Fig. 6 is there are two the Microspeaker structural schematic diagrams of actuator according to the tool of exemplary embodiment of the present.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
Fig. 1-3 shows the schematic diagram of Microspeaker according to an embodiment of the present invention.
As depicted in figs. 1 and 2, Microspeaker, comprising: frame 100；Sound film 200 is installed to the top surface of frame；With
And at least one actuator 300, it is connected to the frame 100.Optionally, which is in cavity shape, is enclosed and is connect by multiple side walls
It forms, the shape adaptation of side wall and actuator 300.Optionally, it is provided with damping sheet 210 on sound film 200, there is centainly rigid
Property.
As shown in Figures 2 and 3, the actuator 300 includes: vibrating mechanism 310, for being believed based on audio voltage or electric current
Number generate vibration；And vibration transmission mechanism 319, the vibrating mechanism 310 and the sound film 200 are connected, by the vibration
The vibration that mechanism 310 generates is transferred to the sound film 200；Wherein the vibrating mechanism 310 includes armature 312, voice coil 311 and magnetic
Cover 320；The voice coil 311 is arranged around the armature 312；The magnetic cover 320 is connected to the frame 100, the magnetic cover
The first magnet 315a and the second magnet are respectively arranged on the inside of 320 upper wall 320a and lower wall 320b parallel to each other
315b；The first end 312a of the armature 312 is connected to the magnetic cover 320, the second end 312b connection of the armature 312
To the vibration transmission mechanism 319 and it is arranged between the first magnet 315a and the second magnet 315b, so that working as sound
When frequency voltage or current signal pass through the voice coil 311, the armature 312 by dynamic magnetization and in the first magnet 315a and
Active force is generated in magnetic field between the second magnet 315b, the armature 312 generates vibration under the active force.It is optional
Ground can be such that the thickness of the loudspeaker reduces as much as possible in process of production, to reduce the volume of Microspeaker.It is optional
Ground, actuator 300 can also have other structures, as shown in figure 5, will describe in detail below.
In an exemplary embodiment of the present invention, the magnetic cover 320 is for rectangle and including the upper wall 320a, the lower wall
The bottom surface of the frame 100 is connected on the outside of 320b, the first side wall 320c and second sidewall 320d, the upper wall 320a.
Optionally, the magnetic cover 320 or other shapes, for example, it is trapezoidal or including parallel upper wall 320a and lower wall 320b
Irregular shape.
In an exemplary embodiment of the present invention, as shown in figure 3, wherein the armature 312, the setting of the voice coil 311 exist
In the magnetic cover 320, the armature 312 is arranged in parallel to the upper wall 320a, the first end 312a of the armature 312 and
Second end 312b is each extended over and is connected to the first side wall 320c and the second sidewall 320d；The vibration transmitting machine
One end of structure 319 is connected on the second end 312b of the armature 312, the other end pass through the upper wall 320a upwardly extend to
It is connected to sound film 200.Optionally, the one end for vibrating transmission mechanism 319 can also be connected to the first end 312a of the armature 312
On.
In an exemplary embodiment of the present invention, the voice coil 311 is wound on the armature 312 and consolidates with the armature
Fixed connection.
In an exemplary embodiment of the present invention, the voice coil 311 is vacantly arranged around the armature 312, and with institute
Magnetic cover 320 is stated to be fixedly connected.
In an exemplary embodiment of the present invention, as shown in figure 3, the first magnet 315a is connected to the upper wall 320a
With the second sidewall 320d, second magnet is connected to the lower wall 320b and the second sidewall 320d.Optionally, when
One end of vibration transmission mechanism 319 is when being connected on the first end 312a of the armature 312, and the first magnet 315a can be with
It is connected to the upper wall 320a and the first side wall 320c, second magnet is connected to the lower wall 320b and described first
Side wall 320c.
In an exemplary embodiment of the present invention, wherein the magnetic cover 320 includes the first cover 313 and the second cover 314；
First cover 313 is U-shaped and including the first side baffle 313a and with being respectively perpendicular is connected to first side baffle two
The first overhead gage 313b and the first lower baffle plate 313c at end；Second cover 314 be it is U-shaped and including the second side baffle 314a with
And it is connected to the second overhead gage 314b and the second lower baffle plate 314c at second side baffle both ends with being respectively perpendicular；Described second
The length of side baffle 314a is less than the length of the first side baffle 313a, and second cover 314 is embedded in first cover
Between the first overhead gage 313b and the first lower baffle plate 313c of body 313, to constitute the magnetic cover 320 of rectangle, such as Fig. 2 and Fig. 3
It is shown.
Optionally, as shown in Fig. 2, the first overhead gage 313b and the second overhead gage 314b forms the upper wall 320a of magnetic cover 320,
The lower wall 320b, the first side baffle 313a that first lower baffle plate 313c and the second lower baffle plate 314c forms magnetic cover 320 form magnetic cover 320
The first side wall 320c, and the second side baffle 314a formed magnetic cover 320 second sidewall 320d.Optionally, second side block
The length of plate 314a can also be greater than the length of the first side baffle 313a, and first cover 313 can be embedded in it is described
Between the second overhead gage 314b and the second lower baffle plate 314c of second cover 314, to constitute the magnetic cover 320 of rectangle.Magnetic cover
This structure, keep its structure simple, it is easily disassembled and be easy to re-assembly, reduce costs and improve behaviour in maintenance
Make efficiency.
In an exemplary embodiment of the present invention, as shown in figure 3, the first end 312a of the armature 312 extends and connects
The first the side baffle 313a, the second end 312b for being connected to first cover 313 extends and connected to second cover
314 the second side baffle 314a and the first magnet 315a is connected to the second overhead gage 314b and of the second cover 314
Two side baffle 314a, the second magnet 315b are connected to the second lower baffle plate 314c and described second of second cover 314
Side baffle 314a.Magnet passes through this set that two baffles are connected with cover respectively, makes its connection between magnetic cover more
Add firm, a possibility that reducing distortion, improves the performance of Microspeaker.
In an exemplary embodiment of the present invention, the first overhead gage 313b of first cover 313 includes first through hole
316, the other end of the vibration transmission mechanism 319 passes through the first through hole 316 and upwardly extends abutting to sound film 200.It is optional
Ground, vibration transmission mechanism 319 can also be abutted by the way that the through-hole of other positions is arranged in sound film 200, such as the second side baffle
Through-hole on 314a.
In an exemplary embodiment of the present invention, actuator 300 further includes a spring branch piece 317, is set on the second magnetic cover 314
There is the second through-hole 318, one end of spring branch piece 317 passes through second through-hole 318 and connect with the other end of armature 312, the spring
The other end of branch piece 317 is fixed on the bottom end of frame 100.The spring branch piece 317 limits armature for supporting armature 312
312 move on the length direction of frame 100, start position-limiting action.
In an exemplary embodiment of the present invention, which selects non-magnetic material, is non magnetic spring branch
Piece.
In an exemplary embodiment of the present invention, as shown in figure 4, the actuator is two, two actuators are symmetrical
It is distributed on the length direction of frame 100.The specific structure of each actuator 300 includes generating vibration based on audio signal
Vibrating mechanism 310 and the vibration transmission mechanism 319 that above-mentioned vibration is transferred to sound film 200；Vibrating mechanism 310 equally includes voice coil
311, armature 312, the first cover 313 and the second cover 314, the first cover 313 and the connection of the second cover 314 form a rectangular edges
Frame, same second cover 314 are equipped with two pieces of magnet 315a, 315b, offer first through hole, voice coil on first cover 313
311, armature 312 is located in the rectangle magnetic cover, likewise, voice coil 311 is wound on armature 312 and is fixedly connected with armature 312,
The inner sidewall other end that one end of armature 312 connects the first cover 313 connects the inner sidewall of the second cover 314, vibrates transmitting machine
One end of structure is connected on armature 312, and the other end passes through first through hole and upwardly extends abutting to sound film, above-mentioned knot from armature 312
Structure is the same as example 1, the second cover of the second cover 314 of one of actuator 300 close to another actuator 300
314, two the first covers 313 away from each other, are completed symmetrical.In the present embodiment, there are two vibrate transmission mechanism for corresponding tool
It is connect with sound film.In addition, in the present embodiment, the second through-hole can need not be arranged in the second cover 314, and there is no need to increase spring branch
Piece.Optionally, each actuator can have structure similar with actuator as shown in Figs. 1-3 300, for brief purpose,
Details are not described herein.By the way that two actuators are arranged, make two actuators while acting on sound film, vibration force suffered by sound film
Also just bigger, to improve the electromechanical conversion efficiency of Microspeaker.
In an exemplary embodiment of the present invention, the actuator is four, and two of them actuator is symmetrically distributed in basin
On the length direction of frame 100, another two is symmetrically distributed in the width direction of frame 100.It optionally, can not on the second cover
Second through-hole must be set, without increasing spring branch piece.Optionally, each actuator can have and actuating as shown in Figs. 1-3
The similar structure of device 300, for brief purpose, details are not described herein.By the way that four actuators are arranged, make four actuators simultaneously
It acts on sound film, vibration force suffered by sound film is also just bigger, to further improve the electromechanical transformation effect of Microspeaker
Rate.
Below with reference to Fig. 5 a and 5b, the Microspeaker of another exemplary embodiment according to the present invention is illustrated.
As shown in Figure 5 a, Microspeaker, comprising: frame 100；Sound film 200 is installed to the top surface of frame；And extremely
A few actuator 400, is connected to the frame 100.
The actuator includes 400: vibrating mechanism 410, for generating vibration based on audio voltage or current signal；And
Transmission mechanism 419 is vibrated, the vibrating mechanism 410 and the sound film 200, the vibration that the vibrating mechanism 410 is generated are connected
It is dynamic to be transferred to the sound film 200；
Wherein the vibrating mechanism 410 includes armature 412, voice coil 411 and magnetic cover 420；The voice coil 411 surrounds the electricity
Pivot 412 and be arranged；The magnetic cover 420 is connected to the frame 100, and the upper wall 420a parallel to each other of the magnetic cover 420 is under
The first magnet 415a and the second magnet 415b are respectively arranged on the inside of wall 420b；The first end 412a of the armature 412
It is connected to the magnetic cover 420, the second end 412b of the armature 412 is connected to the vibration transmission mechanism 419 and setting exists
Between the first magnet 415a and the second magnet 415b, so that when audio voltage or current signal pass through the voice coil
When 411, the armature 412 is in the magnetic field by dynamic magnetization and between the first magnet 415a and the second magnet 415b
Active force is generated, the armature 412 generates vibration under the active force.Optionally, it is provided with damping sheet on sound film 200,
With certain rigidity.
In an exemplary embodiment of the present invention, as shown in Figure 5 b, the magnetic cover 420 is hollow cylinder, and along institute
The axis direction for stating cylinder is connected to the side surface of the frame 100, and the upper wall 420a and lower wall 420b of the magnetic cover 420 points
It is not parallel with the top surface and bottom surface of the frame 100.Microspeaker can be made described by the magnetic cover of this structure of setting
The thickness of loudspeaker reduces 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, the armature is U-shaped and described including being provided with
The upper part 412c of first end 412a, it is provided with the second end 412b and the lower part parallel with the upper part 412c
412d, and it is respectively perpendicular to the lateral parts 412e of the upper part 412c and lower part 412d, the upper part 412c's
Inside is connected to the outside of the upper wall 420a of the magnetic cover 420, and the top in the outside of the upper part 412c and the frame 100
Surface flushes.
In an exemplary embodiment of the present invention, as shown in Figure 5 a, wherein the voice coil 411 is wound in the armature 412
Lower part 412d on and be fixedly connected with the lower part 412d of the armature 412.
In an exemplary embodiment of the present invention, the voice coil 411 can not also be connected with the armature 412, and
It is vacantly to be arranged around the armature 412, and be fixedly connected with the magnetic cover 420.
In an exemplary embodiment of the present invention, the vibration transmission mechanism 419 is riveted to the second end of the armature 412
Hold 412b.Optionally, the vibration transmission mechanism 419 can be also otherwise coupled to the second end of the armature 412
412b, such as bond.
In an exemplary embodiment of the present invention, the lower part 412b of the armature 412 is arranged in first magnet
Between 415a and the second magnet 415b, and between the first magnet 415a and the lower part 412b and described
There are working gas gaps between two magnet 415b and the lower part 412b.
In an exemplary embodiment of the present invention, the vibration transmission mechanism 419 is sound film drive rod, the sound film driving
It is equipped with cavity in bar, damping piece is equipped in the cavity, the sound film driving rod outer surface is equipped with damping layer.
In an exemplary embodiment of the present invention, the sound film drive rod is non magnetic drive rod.
In an exemplary embodiment of the present invention, described sound film drive rod one end rivets other end complications with armature 412 and prolongs
It stretches and is fixedly connected with afterwards at the symmetrical centre of sound film 200.
In an exemplary embodiment of the present invention, as shown in fig. 6, the actuator 400 is two, two actuators
400 are symmetrically connected on two side surfaces of the frame 100.In an exemplary embodiment of the present invention, two actuators
It is symmetrical that the 400 sound film drive rod and the connection form of sound film, which are with the symmetrical centre of sound film,.Optionally, each actuating
Device 400 can have structure similar with actuator as shown in Figure 5, and for brief purpose, details are not described herein.Pass through setting
Two actuators make two actuators 400 while acting on sound film, and vibration force suffered by sound film is also just bigger, to improve
The electromechanical conversion efficiency of Microspeaker.
In an exemplary embodiment of the present invention, the actuator 400 is four, and two of them actuator is symmetrically distributed in
On one side surface of frame, another two actuator is symmetrically distributed on another side surface of frame.In example of the invention
Property embodiment in, it is symmetrical that the sound film drive rod of four actuators and the connection form of sound film, which are with the symmetrical centre of sound film,
's.Optionally, each actuator can have structure similar with actuator as shown in Figure 5, for brief purpose, herein not
It repeats again.By the way that four actuators are arranged, make four actuators while acting on sound film, vibration force suffered by sound film is also just more
Greatly, to further improve the electromechanical conversion efficiency of Microspeaker.
In short, the present invention provides above-mentioned Microspeakers.According to an embodiment of the invention, the electromechanics of Microspeaker turns
It changes coefficient to significantly improve, is 5 to 10 times of the electromechanical conversion coefficient of traditional electrodynamic type Microspeaker, solves piezoelectric ceramics
The vibration amplitude of Microspeaker is too small, overcomes the problems, such as that the electromechanical conversion efficiency of electrodynamic type Microspeaker is relatively low, and tie
Structure is simple, compact, realize loudspeaker it is long narrow and micromation, in addition, embodiment according to the present invention Microspeaker be easy
Production, assembling, disassembly, it is convenient for safeguarding.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of the various inventive aspects,
Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.More precisely, as the following claims reflect, inventive aspect is before being less than
All features of single embodiment disclosed in face.Therefore, it then follows thus claims of specific embodiment are expressly incorporated in
The specific embodiment, wherein each, the claims themselves are regarded as separate embodiments of the invention.
In addition, it will be appreciated by those of skill in the art that although some embodiments in this include institute in other embodiments
Including certain features rather than other feature, but the combination of the feature of different embodiment means in the scope of the present invention
Within and form different embodiments.For example, in detail in the claims, the one of any of embodiment claimed all may be used
Come in a manner of in any combination using.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of several different elements and being come by means of properly programmed computer real
It is existing.In the unit claims listing several devices, several in these devices can be through the same hardware branch
To embody.The use of word first, second, and third does not indicate any sequence.These words can be explained and be run after fame
Claim.
Claims (20)
1. Microspeaker, comprising:
Frame；
Sound film is installed to the top surface of frame；
At least one actuator, is connected to the frame, and the actuator includes:
Vibrating mechanism, for generating vibration based on audio voltage or current signal；And
Transmission mechanism is vibrated, the vibrating mechanism and the sound film is connected, the vibration that the vibrating mechanism generates is transferred to
The sound film；
Wherein the vibrating mechanism includes armature, voice coil and magnetic cover；The voice coil is arranged around the armature；The magnetic cover connects
It is connected to the frame, is respectively arranged with the first magnet and the second magnetic on the inside of the upper wall and lower wall parallel to each other of the magnetic cover
Iron；The first end of the armature is connected to the magnetic cover, and the second end of the armature is connected to the vibration transmission mechanism
And be arranged between first magnet and second magnet, so that when audio voltage or current signal pass through the voice coil
When, the armature generates active force in the magnetic field by dynamic magnetization and between first magnet and second magnet, institute
It states armature and generates vibration under the active force,
Wherein the magnetic cover is rectangle and including the upper wall, the lower wall, the first side wall and second sidewall, the upper wall it is outer
Side is connected to the bottom surface of the frame,
Wherein, the actuator is two, which is symmetrically distributed on the length direction of frame；Or
The actuator is four, and two of them actuator is symmetrically distributed on the length direction of frame, and another two is symmetrical
In in the width direction of frame.
2. Microspeaker as described in claim 1, wherein the armature, the voice coil are arranged in the magnetic cover, it is described
Armature is arranged in parallel to the upper wall, and the first end and second end of the armature each extend over and be connected to described first
Side wall and the second sidewall；One end of the vibration transmission mechanism is connected in the second end of the armature, and the other end is worn
It crosses the upper wall and upwardly extends abutting to sound film.
3. Microspeaker as claimed in claim 1 or 2, wherein first magnet is connected to the upper wall and described first
Side wall, second magnet are connected to the lower wall and the first side wall.
4. Microspeaker as described in claim 1, wherein the magnetic cover includes the first cover and the second cover；Described first
Cover be the first overhead gage that is U-shaped and including the first side baffle and with being respectively perpendicular being connected to the first side block board ends and
First lower baffle plate；Second cover is U-shaped and including the second side baffle and with being respectively perpendicular is connected to second side block
The second overhead gage and the second lower baffle plate of board ends；The length of second side baffle is less than the length of first side baffle,
And second cover is embedded between the first overhead gage and the first lower baffle plate of first cover, to constitute the magnetic of rectangle
Cover.
5. Microspeaker as claimed in claim 4, wherein the first end of the armature extends and connected to described first
First side baffle of cover, the second end extend and connected to the second side baffle and described of second cover
One magnet is connected to the second overhead gage and the second side baffle of the second cover, and second magnet is connected to second cover
Second lower baffle plate and second side baffle.
6. Microspeaker as claimed in claim 4, wherein the first overhead gage of first cover includes first through hole, institute
The other end for stating vibration transmission mechanism passes through the first through hole and upwardly extends abutting to sound film.
7. Microspeaker as claimed in claim 4, which is characterized in that the actuator further includes a spring branch piece, described
Second cover is equipped with the second through-hole, and one end of the spring branch piece passes through second through-hole and the second end of the armature connects
It connects, the other end of the spring branch piece is fixed on the bottom surface in frame.
8. Microspeaker as claimed in claim 7, which is characterized in that the spring branch piece is non magnetic spring branch piece.
9. Microspeaker as described in claim 1, which is characterized in that the voice coil be wound on the armature and with it is described
Armature is fixedly connected.
10. Microspeaker as described in claim 1, wherein the voice coil is vacantly arranged around the armature, and with institute
Magnetic cover is stated to be fixedly connected.
11. a kind of Microspeaker, comprising:
Frame；
Sound film is installed to the top surface of frame；
At least one actuator, is connected to the frame, and the actuator includes:
Vibrating mechanism, for generating vibration based on audio voltage or current signal；And
Transmission mechanism is vibrated, the vibrating mechanism and the sound film is connected, the vibration that the vibrating mechanism generates is transferred to
The sound film；
Wherein the vibrating mechanism includes armature, voice coil and magnetic cover；The voice coil is arranged around the armature；The magnetic cover connects
It is connected to the frame, is respectively arranged with the first magnet and the second magnetic on the inside of the upper wall and lower wall parallel to each other of the magnetic cover
Iron；The first end of the armature is connected to the magnetic cover, and the second end of the armature is connected to the vibration transmission mechanism
And be arranged between first magnet and second magnet, so that when audio voltage or current signal pass through the voice coil
When, the armature generates active force in the magnetic field by dynamic magnetization and between first magnet and second magnet, institute
It states armature and generates vibration under the active force, wherein the magnetic cover is hollow cylinder, and along the axis side of the cylinder
To the side surface for being connected to the frame, and the upper wall of the magnetic cover and the lower wall top surface and bottom surface with the frame respectively
In parallel,
Wherein, the actuator is two, which is symmetrically connected on two side surfaces of the frame；Or
The actuator is four, and two of them actuator is symmetrically distributed on a side surface of frame, another two actuator
It is symmetrically distributed on another side surface of frame.
12. Microspeaker as claimed in claim 11, the armature is U-shaped and including being provided with the upper of the first end
Partially, be provided with the second end and the lower part parallel with the upper part, and be respectively perpendicular to the upper part and
The lateral parts of lower part are connected to the outside of the upper wall of the magnetic cover on the inside of the upper part, and the upper part is outer
Side is flushed with the top surface of the frame.
13. Microspeaker as claimed in claim 12, wherein the voice coil be wound on the lower part of the armature and with
The lower part of the armature is fixedly connected.
14. Microspeaker as claimed in claim 11, wherein the vibration transmission mechanism is riveted to the second of the armature
End.
15. Microspeaker as claimed in claim 11, the lower part of the armature, which is set up separately, is set in first magnet and described
Between second magnet, and between first magnet and the lower part point and between second magnet and the lower part point
There are working gas gaps.
16. Microspeaker as claimed in claim 11, which is characterized in that the vibration transmission mechanism is sound film drive rod,
It is equipped with cavity in the sound film drive rod, damping piece is equipped in the cavity, the sound film driving rod outer surface is equipped with damping layer.
17. Microspeaker as claimed in claim 15, which is characterized in that the sound film drive rod is non magnetic drive rod.
18. Microspeaker as claimed in claim 17, which is characterized in that described sound film drive rod one end and armature riveting are another
One end complications extend after be fixedly connected at the symmetrical centre of sound film.
19. Microspeaker as claimed in claim 17, which is characterized in that the sound film drive rod and sound of two actuators
It is symmetrical that the connection form of film, which is with the symmetrical centre of sound film,.
20. Microspeaker as claimed in claim 17, which is characterized in that the sound film drive rod and sound of four actuators
It is symmetrical that the connection form of film, which is with the symmetrical centre of sound film,.
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 CN105282666A (en) | 2016-01-27 |
| CN105282666B true CN105282666B (en) | 2019-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510546859.7A Active CN105282666B (en) | 2015-08-28 | 2015-08-28 | Microspeaker |
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| Country | Link |
|---|---|
| CN (1) | CN105282666B (en) |
Families Citing this family (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 |
| WO2022021414A1 (en) * | 2020-07-31 | 2022-02-03 | 华为技术有限公司 | Loudspeaker and electronic device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2015
- 2015-08-28 CN CN201510546859.7A patent/CN105282666B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Publication date |
|---|---|
| CN105282666A (en) | 2016-01-27 |
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