CN104811852A - Sound box and television - Google Patents

Sound box and television Download PDF

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Publication number
CN104811852A
CN104811852A CN201510096330.XA CN201510096330A CN104811852A CN 104811852 A CN104811852 A CN 104811852A CN 201510096330 A CN201510096330 A CN 201510096330A CN 104811852 A CN104811852 A CN 104811852A
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CN
China
Prior art keywords
passive radiator
audio amplifier
vibrating diaphragm
passive
cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510096330.XA
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Chinese (zh)
Inventor
黄维财
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUANGDONG HISENSE ELECTRONIC CO., LTD.
Original Assignee
Qingdao Hisense Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Hisense Electronics Co Ltd filed Critical Qingdao Hisense Electronics Co Ltd
Priority to CN201510096330.XA priority Critical patent/CN104811852A/en
Publication of CN104811852A publication Critical patent/CN104811852A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only

Abstract

The invention discloses a sound box and a television. The sound box mainly comprises an active driving loudspeaker and at least one pair of passive radiators. One pair of passive radiators comprises a first passive radiator and a second passive radiator. The first passive radiator and the second passive radiator are symmetrically arranged on two symmetrical faces of the sound box wall. The sound box walls form a sealed sound box cavity. By adopting the method, the problem that when the passive radiator sound box plays bass, the passive radiator sound box has large vibration on the whole can be solved.

Description

A kind of audio amplifier and television set
Technical field
The present invention relates to television acoustics field, relate to a kind of audio amplifier and television set more specifically.
Background technology
Along with the development of television set slimming, the sound system of television set self is little owing to being subject to volume, the restriction that thickness is little and cannot obtain good acoustics, therefore matching used external sound equipment obtains the chance developed rapidly with television set, and especially bar shaped audio amplifier Sound bar develops rapidly.
Better bass effect is had in order to make Soundbar, most products all can design the resonance frequency of an audio amplifier with extraneous UNICOM and after reducing with the phase-reversing tube that box volume matches at rear audio amplifier, phase-reversing tube audio amplifier schematic diagram as shown in Figure 1, the source that mainly includes drives loud speaker 11 and phase-reversing tube 12.Wherein, phase-reversing tube 12 has and strengthens the effect of bass, but also can produce airflow noise when bass is stronger, and phase-reversing tube 12 itself also can account for the audio amplifier internal volume of a part simultaneously, and this is to reducing audio amplifier volume and to increase bass unfavorable.
In order to solve the problem, passive radiator audio amplifier brought into use by many audio amplifiers, specifically passive radiator audio amplifier as shown in Figure 2, mainly comprises an active matrix driving loud speaker 21 and passive radiator 22.Wherein, the profile of passive radiator 22 and active matrix driving loud speaker is similar, but passive radiator only has a support, does not have voice coil loudspeaker voice coil and drive magnet, and passive radiator is got along well, any voice coil loudspeaker voice coil or circuit are connected.Passive radiator can be matched by the resonance frequency of active matrix driving loud speaker own and passive radiator audio amplifier resonance frequency, reaches the effect strengthening bass.But, when the active matrix driving loud speaker of passive radiator audio amplifier is in the music that broadcast bass is stronger, because passive radiator is arranged on audio amplifier wall, the vibration of passive radiator can drive the vibration of passive radiator audio amplifier wall to passive radiator audio amplifier wall active force, when the vibration of passive radiator increases, the vibration of passive radiator audio amplifier complete machine can be caused, beat even on the table.Be to passive radiator audio amplifier counterweight for the current most solution of this phenomenon, the weight increasing passive radiator audio amplifier complete machine alleviates the vibration of audio amplifier, but does like this and both added cost and turn increase audio amplifier weight.
In sum, when playing bass, there is the problem of passive radiator audio amplifier complete machine larger vibration in passive radiator audio amplifier.
Summary of the invention
The embodiment of the present invention provides a kind of audio amplifier and television set, in order to solve passive radiator audio amplifier when playing bass, there is the problem of passive radiator audio amplifier complete machine larger vibration.
The embodiment of the present invention provides a kind of audio amplifier, comprising:
Active matrix driving loud speaker and at least one pair of passive radiator, wherein a pair passive radiator comprises the first passive radiator and the second passive radiator;
Described first passive radiator and described second passive radiator are symmetricly set on two planes of symmetry of audio amplifier wall, wherein, and the audio amplifier cavity that described audio amplifier wall composition is closed.
Preferably, described passive radiator comprises the balancing weight of fixed edge, outstanding limit, vibrating diaphragm and described vibrating diaphragm;
The weight of the balancing weight of described vibrating diaphragm and vibrating diaphragm can not exceed the elastic range on described outstanding limit.
Preferably, to hang the resonance frequency of the coefficient of elasticity on limit and described audio amplifier cavity relevant for weight and the described passive radiator of the vibrating diaphragm of described passive radiator and the balancing weight of described vibrating diaphragm.
Preferably, the resonance frequency of described audio amplifier cavity is determined according to following formula:
f b = 1 2 π K M
Wherein, f bfor the resonance frequency of described audio amplifier cavity, K is the outstanding limit coefficient of elasticity of passive radiator, and M is the weight of the vibrating diaphragm of passive radiator and the balancing weight of described vibrating diaphragm.
Preferably, described active matrix driving loud speaker and described first passive radiator/or described second passive radiator are arranged in the identical faces of described audio amplifier wall.
Preferably, described first passive radiator and the second passive radiator size completely the same.
Preferably, described audio amplifier is bar shaped audio amplifier.
The embodiment of the present invention also provides one to comprise television set, comprises above-mentioned audio amplifier.
Audio amplifier in the embodiment of the present invention comprises active matrix driving loud speaker and at least one pair of passive radiator, and wherein a pair passive radiator comprises the first passive radiator and the second passive radiator; Described first passive radiator and described second passive radiator are symmetricly set on two planes of symmetry of audio amplifier wall, wherein, and the audio amplifier cavity that described audio amplifier wall composition is closed.The audio amplifier that the embodiment of the present invention provides, be arranged on two planes of symmetry of audio amplifier wall due to the first passive radiator and the second passive radiator symmetry, when active matrix driving loud speaker is to after vibration, the smaller volume of the audio amplifier cavity that audio amplifier wall composition is closed, air in meeting compression chamber, air simultaneously in cavity can extrude two passive radiators, makes the outwards motion simultaneously of two passive radiators; When active matrix driving loud speaker vibrates forward, the volume of the audio amplifier cavity that audio amplifier wall composition is closed becomes large, and cavity internal gas pressure reduces, and atmospheric pressure can extrude the inwardly motion simultaneously of two passive radiators.Adopt said method, no matter active matrix driving loud speaker to vibrate forward or to after vibration, first passive radiator and the second passive radiator all can inwardly move simultaneously or outwards move, because the direction of two passive radiator motions is contrary, two equal and opposite in directions can be formed point-blank, direction opposite effect power.Thus for the audio amplifier cavity that audio amplifier wall composition is closed, do not produce any active force, therefore when bass play by passive radiator audio amplifier, effectively inhibit the problem of passive radiator audio amplifier complete machine oscillation.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is phase-reversing tube loudspeaker box structure schematic diagram in prior art;
Fig. 2 is passive radiator loudspeaker box structure schematic diagram in prior art;
A kind of loudspeaker box structure schematic diagram of Fig. 3 for providing in the embodiment of the present invention;
Active matrix driving loadspeaker structure schematic diagram in the audio amplifier that Fig. 4 provides for the embodiment of the present invention;
Passive radiator structural representation in the audio amplifier that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Audio amplifier in the embodiment of the present invention comprises active matrix driving loud speaker and at least one pair of passive radiator, and wherein a pair passive radiator comprises the first passive radiator and the second passive radiator; Described first passive radiator and described second passive radiator are symmetricly set on two planes of symmetry of audio amplifier wall, wherein, and the audio amplifier cavity that described audio amplifier wall composition is closed.The audio amplifier that the embodiment of the present invention provides, be arranged on two planes of symmetry of audio amplifier wall due to the first passive radiator and the second passive radiator symmetry, when active matrix driving loud speaker is to after vibration, the smaller volume of the audio amplifier cavity that audio amplifier wall composition is closed, air in meeting compression chamber, air simultaneously in cavity can extrude two passive radiators, makes the outwards motion simultaneously of two passive radiators; When active matrix driving loud speaker vibrates forward, the volume of the audio amplifier cavity that audio amplifier wall composition is closed becomes large, and cavity internal gas pressure reduces, and atmospheric pressure can extrude the inwardly motion simultaneously of two passive radiators.Adopt said method, no matter active matrix driving loud speaker to vibrate forward or to after vibration, first passive radiator and the second passive radiator all can inwardly move simultaneously or outwards move, because the direction of two passive radiator motions is contrary, form two equal and opposite in directions point-blank, direction opposite effect power.Thus for the audio amplifier cavity that audio amplifier wall composition is closed, do not produce any active force, therefore when bass play by passive radiator audio amplifier, effectively inhibit the problem of passive radiator audio amplifier complete machine oscillation.
Below in conjunction with Figure of description, the preferred embodiments of the present invention are described, be to be understood that, preferred embodiment described herein is only for instruction and explanation of the present invention, be not intended to limit the present invention, and when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
As shown in Figure 3, embodiments provide a kind of audio amplifier, comprising: active matrix driving loud speaker 32, a pair passive radiator 33-1 and 33-2, audio amplifier wall 34, audio amplifier cavity 31 and audio amplifier foot pad 35.
Further, a pair passive radiator comprises the first passive radiator and the second passive radiator, as shown in Figure 3, if the first passive radiator is 33-1, then the second passive radiator is 33-2, similarly, if the first passive radiator is 33-2, then the first passive radiator is 33-1.In embodiments of the present invention, further restriction is not done to the particular location of the first passive radiator and the second passive radiator.
In following examples, with the first passive radiator for 33-1 is introduced explanation.
As shown in Figure 3, the first passive radiator 33-1 and the second passive radiator 33-2 is symmetrical set on two planes of symmetry of audio amplifier wall 34, and the first passive radiator 33-1 and active matrix driving loud speaker 32 are arranged in the identical faces of audio amplifier wall.
Further, first passive radiator and the second passive radiator have the on all four profile of size, so, first passive radiator can be arranged in the identical faces of audio amplifier wall with active matrix driving loud speaker, second passive radiator also can be arranged in the identical faces of audio amplifier wall with active matrix driving loud speaker, and the embodiment of the present invention does not do concrete restriction to the identical faces that the first passive radiator or the second passive radiator and active matrix driving loud speaker are arranged on audio amplifier wall.
As shown in Figure 3, arrange on the plane of symmetry on the audio amplifier wall 34 of active matrix driving loud speaker 32 and be provided with audio amplifier foot pad 35, and this audio amplifier foot pad 35 is arranged on outside the closed voice box cavity 31 of audio amplifier wall 34 composition.In the embodiment of the present invention, the particular location that audio amplifier foot pad 35 is arranged is not limited, audio amplifier foot pad 35 can be arranged on the plane of symmetry of the audio amplifier wall 34 being provided with active matrix driving loud speaker 32, also the outside of the audio amplifier wall 34 being provided with active matrix driving loud speaker 32 can be arranged on, meanwhile, the embodiment of the present invention does not do any restriction to the shape of audio amplifier foot pad 35 yet.
As shown in Figure 4, be the active matrix driving loadspeaker structure schematic diagram that the embodiment of the present invention provides, mainly comprise fixed edge 40, outstanding limit 41, vibrating diaphragm 42, voice coil loudspeaker voice coil 43, support 44 and drive magnet 45.As shown in Figure 5, be the passive radiator structural representation that the embodiment of the present invention provides, mainly comprise fixed edge 51, outstanding limit 52, vibrating diaphragm 53 and support 54, wherein, vibrating diaphragm 53 also comprises balancing weight (not shown).Can be determined by Fig. 4 and Fig. 5, active matrix driving loud speaker is the same with the profile of passive radiator, all comprise fixed edge, outstanding limit, vibrating diaphragm and support, but passive radiator does not have voice coil loudspeaker voice coil and drive magnet, because passive radiator does not comprise voice coil loudspeaker voice coil and drive magnet, so passive radiator can not be connected with circuit, therefore passive radiator can not be sounded.
As shown in Figure 3, because the first passive radiator 33-1 and active loudspeaker 32 are arranged in the identical faces of audio amplifier wall, first passive radiator 33-1 and the second passive radiator 33-2 is symmetrical set on two planes of symmetry of audio amplifier wall 34, so can determine that the second passive radiator 33-2 is also separately positioned on two planes of symmetry of audio amplifier wall with active loudspeaker 32.
When active matrix driving loudspeaker vibration in the audio amplifier being provided with the first passive radiator, the second passive radiator and active matrix driving loud speaker time, audio amplifier cavity can be driven to vibrate, thus the first passive radiator and the second passive radiator can be caused to do corresponding vibration.In embodiments of the present invention, vibrate the air vibration caused in order to allow audio amplifier cavity and can effectively promote the first passive radiator and the second passive radiator does corresponding vibration, the vibrating diaphragm of the first passive radiator and the second passive radiator is substantially all designed to planar structure.
Further, be provided with the first passive radiator, the second passive radiator is relevant to the resonance frequency of active matrix driving loud speaker with the resonance frequency of the audio amplifier cavity of active matrix driving loud speaker, so, in time determining the resonance frequency of active matrix driving loud speaker in audio amplifier, namely also determine the resonance frequency of audio amplifier cavity accordingly.In embodiments of the present invention, the resonance frequency of audio amplifier cavity is determined according to formula (1):
f b = 1 2 π K M - - - ( 1 )
Wherein, f bfor the resonance frequency of audio amplifier cavity, K is the coefficient of elasticity on the outstanding limit of passive radiator, and M is the weight of the vibrating diaphragm of passive radiator and the balancing weight of described vibrating diaphragm.
In embodiments of the present invention, in the same size due to the first passive radiator and the second passive radiator, so, if determine the coefficient of elasticity on the outstanding limit of passive radiator, then can determine the coefficient of elasticity on the outstanding limit of the first passive radiator and the second passive radiator; Similarly, if determine the quality of the vibrating diaphragm of passive radiator and the balancing weight of this vibrating diaphragm, then the quality of the vibrating diaphragm of the first passive radiator and the second passive radiator and the balancing weight of this vibrating diaphragm can be determined.
Further, to ask audio amplifier to have good bass effect, then can require that audio amplifier cavity needs lower and consistent with the resonance frequency of active matrix driving loud speaker resonance frequency, therefore, if the f in formula (1) accordingly bcan be little as much as possible, then audio amplifier can be made to have good bass effect.Can determine according to formula (1), the resonance frequency f of audio amplifier cavity bproportional with the coefficient of elasticity K on the outstanding limit of passive radiator, and be inverse ratio with the weight M of the vibrating diaphragm of passive radiator and the balancing weight of described vibrating diaphragm, so, in order to make audio amplifier reach good bass effect, the weight of the balancing weight of the coefficient of elasticity on the outstanding limit reducing passive radiator or increase vibrating diaphragm can be adopted to have good bass effect to make audio amplifier.
Can determine according to formula (1), if make audio amplifier to reach good bass effect, the weight of the coefficient of elasticity that can adopt the outstanding limit reducing passive radiator or the balancing weight increasing vibrating diaphragm.Make audio amplifier reach good bass effect according to the coefficient of elasticity on outstanding limit reducing passive radiator, the weight due to the balancing weight of vibrating diaphragm in passive radiator and vibrating diaphragm can not exceed the elastic range on the outstanding limit of passive radiator.If the coefficient of elasticity reducing the outstanding limit of passive radiator reaches good bass effect, then need the Oscillation Amplitude of the vibrating diaphragm reducing passive radiator accordingly, if the Oscillation Amplitude of audio amplifier cavity is larger, the vibrating diaphragm of passive radiator then can be caused also to have larger Oscillation Amplitude, cause the coefficient of elasticity on the outstanding limit of passive radiator can not bear the Oscillation Amplitude of vibrating diaphragm further.Can determining according to above-mentioned analysis, to ask audio amplifier to reach good bass effect, the weight of the balancing weight increasing vibrating diaphragm can only be adopted.
Further, if make audio amplifier to reach good bass effect, the weight of unconfined increase vibrating diaphragm balancing weight, then can cause the outstanding limit of passive radiator cannot bear the weight of the balancing weight of vibrating diaphragm and vibrating diaphragm and damaged, or directly cause vibrating diaphragm cannot bear the weight of balancing weight and damaged.In embodiments of the present invention, the size of the balancing weight of vibrating diaphragm is relevant to the density of close balancing weight, and wherein, balancing weight generally comprises unit of plastic or metal derby.Therefore can select the balancing weight that size greater density is less, such as, the dimension limit that the size of balancing weight is mated with vibrating diaphragm can be selected, the weight of balancing weight can be increased like this.
Because passive radiator is arranged on audio amplifier wall, so, the restricted size with audio amplifier wall of the size dimension of passive radiator, therefore, adopt the weight increasing vibrating diaphragm balancing weight to reach audio amplifier in formula (1) and there is good bass effect, or size that is restricted and audio amplifier wall.
In embodiments of the present invention, adopt and the design of a passive radiator is divided into two passive radiators, the weight easily solving the vibrating diaphragm balancing weight of a passive radiator can not reach the effect that audio amplifier has better bass.Therefore, arranging two passive radiators in the embodiment of the present invention in audio amplifier can make audio amplifier have good bass effect.
Further, this audio amplifier is bar shaped audio amplifier, therefore audio amplifier wall can be arranged respectively the passive radiator that many groups are symmetrical, thus audio amplifier can be made to have good bass effect.In the embodiment of the present invention, the passive radiator only guaranteed audio amplifier wall arranged is even number, and is symmetrical set between two on audio amplifier wall, be then not specifically limited the quantity of the passive radiator that audio amplifier wall is arranged and the position of setting.
In embodiments of the present invention, when the vibrating diaphragm of active matrix driving loud speaker vibrates forward, the volume of audio amplifier cavity can become large, in cavity, gas density diminishes, air pressure reduces, external atmosphere pressure can compress the first passive radiator and the second passive radiator simultaneously to the internal motion of audio amplifier cavity, because the first passive radiator and active matrix driving loud speaker are arranged on same audio amplifier wall, and the second passive radiator and described first passive radiator are symmetricly set on two planes of symmetry of described audio amplifier wall, so the first passive radiator and the second passive radiator, can simultaneously to arranging the audio amplifier wall of the first passive radiator and arranging audio amplifier wall active force towards audio amplifier cavity of the second passive radiator, when the vibrating diaphragm of active matrix driving loud speaker is to after vibration, the volume of audio amplifier cavity can diminish, in cavity, gas density increases, air pressure raises, the outwards motion simultaneously of two passive radiators can be shifted onto, because the first passive radiator and active matrix driving loud speaker are arranged on same audio amplifier wall, and the second passive radiator and described first passive radiator are symmetricly set on two planes of symmetry of described audio amplifier wall, so the first passive radiator and the second passive radiator, can simultaneously to the active force of the audio amplifier wall arranging the first passive radiator and one, the audio amplifier wall audio amplifier cavity dorsad that arranges the second passive radiator.Therefore no matter the first passive radiator and the second passive radiator are that the first passive radiator and the second passive radiator are all equal and opposite in directions to the amount of force of audio amplifier wall, and direction is contrary towards cavity or cavity dorsad to the active force of audio amplifier wall.The first passive radiator and the second passive radiator in the embodiment of the present invention is adopted to be symmetricly set on two planes of symmetry of described audio amplifier wall, while audio amplifier can be made to have good bass effect, effectively alleviate complete machine and shake because passive radiator vibrates the machine caused.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (8)

1. an audio amplifier, is characterized in that, comprising:
Active matrix driving loud speaker and at least one pair of passive radiator, wherein a pair passive radiator comprises the first passive radiator and the second passive radiator;
Described first passive radiator and described second passive radiator are symmetricly set on two planes of symmetry of audio amplifier wall, wherein, and the audio amplifier cavity that described audio amplifier wall composition is closed.
2. audio amplifier as claimed in claim 1, is characterized in that, described passive radiator comprises the balancing weight of fixed edge, outstanding limit, vibrating diaphragm and described vibrating diaphragm;
The weight of the balancing weight of described vibrating diaphragm and vibrating diaphragm can not exceed the elastic range on described outstanding limit.
3. audio amplifier as claimed in claim 2, is characterized in that, the resonance frequency that weight and the described passive radiator of the vibrating diaphragm of described passive radiator and the balancing weight of described vibrating diaphragm hang the coefficient of elasticity on limit and described audio amplifier cavity is relevant.
4. audio amplifier as claimed in claim 3, it is characterized in that, the resonance frequency of described audio amplifier cavity is determined according to following formula:
f b = 1 2 π K M
Wherein, f bfor the resonance frequency of described audio amplifier cavity, K is the outstanding limit coefficient of elasticity of passive radiator, and M is the weight of the vibrating diaphragm of passive radiator and the balancing weight of described vibrating diaphragm.
5. audio amplifier as claimed in claim 1, is characterized in that, described active matrix driving loud speaker and described first passive radiator/or described second passive radiator are arranged in the identical faces of described audio amplifier wall.
6. audio amplifier as claimed in claim 1, is characterized in that, described first passive radiator and the second passive radiator size completely the same.
7. audio amplifier as described in any one of claim 1-6, is characterized in that, described audio amplifier is bar shaped audio amplifier.
8. a television set, is characterized in that, comprises the audio amplifier described in any one of claim 1 to 7.
CN201510096330.XA 2015-03-04 2015-03-04 Sound box and television Pending CN104811852A (en)

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CN201510096330.XA CN104811852A (en) 2015-03-04 2015-03-04 Sound box and television
PCT/CN2015/077407 WO2016138691A1 (en) 2015-03-04 2015-04-24 Speaker box and television

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Cited By (5)

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CN105142065A (en) * 2015-08-18 2015-12-09 无锡杰夫电声有限公司 Sound box based on oppositely buckled passive radiator
CN105554597A (en) * 2016-03-03 2016-05-04 无锡杰夫电声股份有限公司 Strip-shaped loudspeaker box with mirror image type low-frequency radiators
WO2016138691A1 (en) * 2015-03-04 2016-09-09 青岛海信电器股份有限公司 Speaker box and television
CN106454624A (en) * 2016-11-21 2017-02-22 青岛海信电器股份有限公司 Sound box component, sound box and display equipment
CN105472503B (en) * 2016-01-14 2018-10-30 佳禾智能科技股份有限公司 A kind of passive radiator speaker

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Publication number Priority date Publication date Assignee Title
WO2016138691A1 (en) * 2015-03-04 2016-09-09 青岛海信电器股份有限公司 Speaker box and television
CN105142065A (en) * 2015-08-18 2015-12-09 无锡杰夫电声有限公司 Sound box based on oppositely buckled passive radiator
CN105472503B (en) * 2016-01-14 2018-10-30 佳禾智能科技股份有限公司 A kind of passive radiator speaker
CN105554597A (en) * 2016-03-03 2016-05-04 无锡杰夫电声股份有限公司 Strip-shaped loudspeaker box with mirror image type low-frequency radiators
CN106454624A (en) * 2016-11-21 2017-02-22 青岛海信电器股份有限公司 Sound box component, sound box and display equipment
CN106454624B (en) * 2016-11-21 2019-09-17 青岛海信电器股份有限公司 Speaker component, speaker and display equipment

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Effective date of registration: 20160621

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Applicant after: GUANGDONG HISENSE ELECTRONIC CO., LTD.

Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218

Applicant before: Qingdao Hisense Electric Co., Ltd.

RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20150729