WO2021218554A1 - 移动终端 - Google Patents

移动终端 Download PDF

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Publication number
WO2021218554A1
WO2021218554A1 PCT/CN2021/084536 CN2021084536W WO2021218554A1 WO 2021218554 A1 WO2021218554 A1 WO 2021218554A1 CN 2021084536 W CN2021084536 W CN 2021084536W WO 2021218554 A1 WO2021218554 A1 WO 2021218554A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
mobile terminal
chamber
cover plate
cover
Prior art date
Application number
PCT/CN2021/084536
Other languages
English (en)
French (fr)
Inventor
冯炉
刘阳
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21795846.1A priority Critical patent/EP4124063A4/en
Priority to US17/919,712 priority patent/US20230142874A1/en
Publication of WO2021218554A1 publication Critical patent/WO2021218554A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/021—Casings; Cabinets ; Supports therefor; Mountings therein incorporating only one transducer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
    • H04R1/2826—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
    • H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2873—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • This application belongs to the technical field of audio equipment, and in particular relates to a mobile terminal.
  • Terminal devices such as mobile phones, tablet computers, or notebook computers are equipped with speakers.
  • the speakers include a box body and a sound unit arranged in the box body. When the speaker is applied to the terminal device, the box body will communicate with the external environment through the sound outlet.
  • the purpose of the embodiments of the present application is to provide a mobile terminal, which aims to solve the problem that when the housing of the mobile terminal in the prior art is pressed and the volume of the internal space changes, the tooth sound and metal sound of the speaker in the mobile terminal are more pronounced.
  • a mobile terminal includes a housing and a speaker arranged in the housing, and the speaker includes a box and a sound unit for sound;
  • the box body includes a first cover body, a second cover body on the first cover body, and a cover plate;
  • the sound generating unit is arranged in the first cover body and is connected to the inner bottom of the first cover body
  • a first chamber is formed between the walls, and the first chamber is provided with a sound outlet communicating with the external environment of the housing; between the sound generating unit and the inner top wall of the second cover is formed
  • the sound unit has a diaphragm for vibrating and sounding, and the opposite sides of the diaphragm respectively correspond to the first cavity and the second cavity;
  • the first cover is formed with A resonant cavity, the resonant cavity is in communication with the first cavity, a side of the resonant cavity facing the second cavity is provided with a through opening,
  • the speaker is arranged in its housing, a first cavity is formed between the sound emitting unit of the speaker and the first cover of the box body, and a first cavity is formed between the sound emitting unit and the second cover of the box body.
  • the sound emitted by the sound unit is emitted to the outside environment through the sound outlet.
  • the first chamber is connected to the second chamber through the resonant cavity, and the opening of the resonant cavity is provided with a cover plate with micro-holes.
  • the resonant cavity is connected to the second cavity through the micro-hole, so that the first cavity and the second cavity of the box body can maintain the air pressure balance through the resonant cavity, so that the diaphragm of the sound unit vibrates normally. Since the second chamber and the resonant cavity are connected through the micro-holes, the air flow through the micro-holes is small, which will reduce the air flow in the second chamber.
  • an enclosure frame is provided in the first cover body, the sound generating unit is embedded in the enclosure frame, and an interval is formed between the inner side wall of the first cover body and the outer side wall of the enclosure frame.
  • a bulk object is arranged in the first area, and the resonant cavity is opened in the bulk object.
  • the first area is formed between the inner wall of the first cover and the outer wall of the enclosure, and the resonant cavity is opened in the block object in the first area. This makes full use of the assembly space in the box and realizes resonance.
  • the cavity is arranged independently of the first cavity and the second cavity.
  • the box body further includes a porous object, and the porous object is disposed on the cover plate and covers the micropores.
  • the combination of the porous object and the micropores further restricts the air flow into and out of the second chamber, thereby further stabilizing the second chamber The internal air pressure of the chamber.
  • the porous object is attached to a side of the cover plate facing or facing away from the resonant cavity.
  • a cavity is formed on a side of the cover plate facing or facing away from the resonant cavity, the porous object is embedded in the cavity, and the micropores are opened at the bottom of the cavity.
  • a gap is formed between the outer edge of the porous object and the cavity wall of the cavity.
  • the porous object is a mesh cloth, and the mesh cloth is made of non-woven fabric;
  • the mesh fabric is formed by laminating non-woven fabric and degreased gauze.
  • the porous object is a mesh cloth, thanks to the better permeability of the mesh cloth, the pores on it are distributed more uniformly and densely, so the cooperation with the micropores can realize the access to the second chamber on the one hand. Accurate adjustment of air flow.
  • the box body further includes a PET film, the PET film covering a side of the cover plate facing the resonant cavity, and a connection between the PET film and the cover plate is formed The first ventilation zone of the resonant cavity.
  • the box body further includes a PET film, the PET film covering a side of the cover plate facing away from the resonant cavity, and a connection between the PET film and the cover plate is formed.
  • the second ventilation zone of the second chamber is formed.
  • the box body further includes a PET film covering a side of the cover plate facing or facing away from the resonant cavity, and a plurality of ventilation holes are opened on the PET film.
  • the cavity wall of the first chamber is provided with a connecting channel
  • the connecting channel penetrates the enclosure frame and the block object and communicates with the resonant cavity
  • the cross-sectional area of the connecting channel Larger than the opening area of the micropores.
  • the cross-sectional area of the connecting channel is 2 to 15 times the opening area of the micropore. In this way, precise control of the speed at which the air flow is exchanged between the first chamber and the second chamber is achieved.
  • the pore diameter of the micropores is 0.5 mm-2 mm. In this way, the air flow into and out of the second chamber is effectively controlled.
  • Figure 1 is a drawing of the prior art
  • FIG. 2 is a schematic diagram of the structure of a mobile terminal and a speaker provided by an embodiment of the application;
  • FIG. 3 is a schematic diagram 1 of a cut-away structure of a loudspeaker provided by an embodiment of the application;
  • FIG. 4 is a second schematic diagram of a cut-away structure of a loudspeaker provided by an embodiment of the application.
  • FIG. 5 is a third schematic diagram of a cut-away structure of a loudspeaker provided by an embodiment of the application.
  • FIG. 6 is a fourth schematic diagram of a cut-away structure of a loudspeaker provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of an exploded structure of a loudspeaker provided by an embodiment of the application.
  • FIG. 8 is a schematic diagram 1 of a part of the structure of a speaker provided by an embodiment of the application.
  • FIG. 9 is a second schematic diagram of a partial structure of a speaker provided by an embodiment of the application.
  • FIG. 10 is a cross-sectional view of the mesh cloth of the speaker provided by an embodiment of the application.
  • FIG. 11 is a third schematic diagram of a part of the structure of a speaker provided by an embodiment of the application.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present application, “multiple” means two or more than two, unless otherwise specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components.
  • installed can be a fixed connection or a detachable connection , Or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components.
  • Loudspeaker It is a kind of transducer device that converts electrical signals into acoustic signals. It drives the voice coil in it to vibrate through electricity and drives the diaphragm to vibrate, so that the surrounding air resonates and then emits sound.
  • PET Polyethylene-terephthalate: refers to a thermoplastic polyester containing polyethylene terephthalate, which is a polycondensate of terephthalic acid and ethylene glycol, commonly known as polyester resin in the industry.
  • Non-woven fabric It is made of directional or random fibers and has many advantages such as moisture-proof, breathable, flexible, light weight, non-combustible, and easy to decompose.
  • Degreasing gauze refers to pure cotton gauze that has undergone degreasing treatment.
  • FIG. 1 is a schematic structural diagram of a sounding device 30 in the prior art, which shows that the casing of the sounding device 30 is provided with a vent hole 31.
  • the vent hole 31 of the sounding device communicates with the internal space of the terminal device.
  • an embodiment of the present application provides a mobile terminal 20, which includes a housing 21 and a speaker 10 arranged in the housing 21.
  • the mobile terminal 20 includes, but is not limited to, mobile phones, tablet computers, notebook computers, ultra-mobile personal computers (UMPC), netbooks, or personal digital assistants (personal digital assistants, PDAs), etc., especially waterproof and sealed
  • the embodiment of the present application does not impose any restriction on the specific type of the mobile terminal 20.
  • the speaker 10 includes a box body 11 and a sound generating unit 12 for sounding.
  • the box body 11 includes a first cover body 117, a second cover body 118 located on the first cover body 117, and a cover plate 13.
  • the sound generating unit 12 is arranged in the first cover body 117, and a first chamber 111 is formed between the inner bottom wall of the first cover body 117, and the first chamber 111 is provided with an outlet communicating with the external environment of the housing 21
  • the sound port 113, the housing 21 of the mobile terminal 20 is provided with a gap 22 corresponding to the sound outlet 113 of the speaker 10, so that the sound emitted by the speaker 10 is transmitted to the external environment, the sound unit 12 and the inner top of the second cover 118
  • a second cavity 112 is formed between the walls.
  • the sounding unit 12 may be a dome-type sounding unit, a reed-type sounding unit, a paper cone-type sounding unit, or the like.
  • the basic composition of the sound unit 12 may include a basin frame 121, a voice coil 122 arranged in the basin frame 121, and a diaphragm 123 surrounding the outer circumference of the voice coil 122 and exposed on the basin frame 121.
  • the diaphragm 123 A washer 124 and a magnetic member 125 are arranged in sequence below the magnetic member 125, and an iron core 126 is arranged below the magnetic member 125.
  • the speaker 10 also leads to a flexible circuit board for electrical connection with related electrical devices in the mobile terminal 20 127.
  • the opposite sides of the diaphragm 123 of the sound unit 12 correspond to the first cavity 111 and the second cavity 112, respectively.
  • the first cover 117 is formed with a resonant cavity 114, a resonant cavity 114 and a first cavity
  • the chamber 111 is in communication
  • the resonance cavity 114 is provided with a through opening 116 on the side facing the second chamber 112
  • the cover plate 13 is provided on the through opening 116
  • the cover plate 13 is provided with a microcomputer connected to the second chamber 112 ⁇ 115.
  • the side of the diaphragm 123 facing away from the magnetic element 125 is disposed corresponding to the first cavity 111, and the side of the diaphragm 123 facing the magnetic element 125 is disposed corresponding to the second cavity 112.
  • the speaker 10 The second chamber 112 is not in communication with the internal space of the housing 21 of the mobile terminal 20. As shown in FIGS. 2 to 4, the resonant cavity 114 communicates with the second cavity 112 through the microhole 115.
  • the sound generating unit 12 is arranged in the box body 11 and is connected to the first cover body 117 of the box body 11.
  • a first chamber 111 is formed therebetween, and a second chamber 112 is formed between the sounding unit 12 and the second cover 118 of the box body 11.
  • the sound emitted by the sounding unit 12 is emitted to the outside environment through the sound outlet 113,
  • the first cavity 111 communicates with the second cavity 112 through the resonant cavity 114, the opening 116 of the resonant cavity 114 is provided with a cover plate 13 with a micro hole 115, and the resonant cavity 114 passes through the micro hole 115 and the second cavity 112 is connected, so that the first cavity 111 and the second cavity 112 of the speaker 10 can maintain the air pressure balance through the resonant cavity 114, so that the diaphragm 123 of the sound unit 10 can vibrate normally.
  • the air flow through the micro-hole 115 is small, which will reduce the air flow in the second chamber 112.
  • the airflow enters and exits the second chamber 112 through the microhole 115, so that the internal air pressure of the second chamber 112 will not change significantly.
  • the first chamber 111 usually communicates with the sound outlet 113 and the external environment, so the internal air pressure of the first chamber 111 will not change significantly, so that when the diaphragm 123 of the generating unit 12 vibrates, its amplitude can be maintained at Within a reasonable range, this also prevents the diaphragm 123 from hitting the magnetic member 125 in the sound unit 12 when vibrating, which effectively suppresses the tooth sound when the speaker 10 emits sound, especially when high-frequency sounds are emitted. And the metallic sound enhances the sound quality of the high-frequency sound of the speaker 10.
  • the cover plate 13 By opening a through hole 116 on one side of the resonant cavity 114 and forming a micro hole 115 on the cover plate 13 provided on the through hole 116, when the aperture size of the micro hole 115 needs to be changed and adjusted, it can be adjusted.
  • the cover plate 13 is disassembled and replaced, and replaced with a cover plate 13 having a corresponding aperture of the micro-hole 115, so that the flexible adjustment of the aperture of the micro-hole 115 is realized.
  • the cover plate 13 can be embedded in the through opening 116 to improve the convenience of disassembly and replacement of the cover plate 13 relative to the second chamber 112, and it can also be attached to the through hole by means of glue or hot melt bonding.
  • the outer edge of the opening 116 is used to improve the assembly stability of the cover plate 13 relative to the second cavity 112.
  • the micro-hole 115 may be a special-shaped hole such as a round hole, an elliptical hole, or a rectangular hole.
  • the specific selection of the hole type of the micro-hole 115 can be determined according to the exchange air flow rate designed in the second chamber 112.
  • a surrounding frame 119 is provided in the first cover 117, the sound generating unit 12 is embedded in the surrounding frame 119, and the inner wall of the first cover 117 and A first area 16 is formed between the outer walls of the enclosure frame 119, a block object 17 is arranged in the first area 16, the resonant cavity 114 is opened in the block object 17, and the connecting channel 18 penetrates the enclosure frame 119 and the block object 17 and communicate with the resonant cavity 114.
  • the sounding unit 12 and the enclosure frame 119 can be sealed with glue, so that on the one hand, the isolation and sealing of the first chamber 111 and the second chamber 112 are realized, and on the other hand, the sounding unit 12 and the enclosure frame 119 can be separated and sealed.
  • the glue is used for buffering, which eliminates the unnecessary vibration caused by the collision between the sounding unit 12 and the enclosure 119, and improves the sound effect of the sounding unit 12.
  • the first area 16 is formed between the inner wall of the first cover 117 and the outer wall of the enclosure frame 119, and the resonant cavity 114 is opened in the block object 17 in the first area 16, thus making full use of the box.
  • the assembly space in 11 realizes the independent arrangement of the resonant cavity 114 relative to the first cavity 111 and the second cavity 112.
  • the block object 17 may be integrally formed with the first cover body 117, so that the manufacturing cost of the box body 11 is reduced.
  • the block object 17 can also be separately prepared and molded, and then embedded or glued in the first region 16.
  • the material of the bulk object 17 and the first cover 117 do not have to be the same.
  • the first cover 17 can be made of plastic, and the bulk object 17 can be made of metal.
  • the shape of the block object can be a square or a special-shaped block, and its shape can be determined according to the size and shape of the assembly space remaining in the first area 16.
  • the box body 11 further includes a porous object 14, and the porous object 14 is disposed on the cover plate 13 and covers the micropores 115.
  • the combination of the porous object 14 and the micropores 115 realizes the control of the air flow into and out of the second chamber 112. Further restriction, thereby further stabilizing the internal air pressure of the second chamber 112.
  • the porous object 14 can be detachably covered on the cover plate 13 by double-sided tape or the like, so that the porous object 14 of different thickness can be replaced to achieve further precise adjustment of the air flow into and out of the second chamber 112 , Thereby realizing precise control of the internal air pressure of the second chamber 112.
  • the porous object 14 is attached to the side of the cover plate 13 facing or facing away from the resonant cavity 114.
  • the porous object 14 can be installed on the side of the cover plate 13 facing or facing away from the resonant cavity 114 according to the size of the assembly space on the side of the cover plate 13 facing or facing away from the resonant cavity 114.
  • a cavity 131 is opened on the side of the cover plate 13 facing or facing away from the resonant cavity 114, and the porous object 14 is embedded in the cavity 131.
  • the hole 115 is opened at the bottom of the cavity 131.
  • the porous object 14 is pasted in the cavity 131, which improves the assembly stability of the porous object 14 in the cavity 131.
  • the outer edge of the porous object 14 can be connected to the cavity wall of the cavity 131 or the edge of the bottom of the cavity 131 by glueing or attaching double-sided tape, so that when the air flows through the micropores 115 to the porous object 14 , It will not flow out from the gap between the porous object 14 and the cavity wall of the cavity 131, but mostly flow through the porous object 14 and then flow into the second cavity 112 or the resonant cavity 114. In this way, the utilization rate of the porous object 14 is improved, and the function of the porous object 14 to block the airflow is fully exerted.
  • a gap is formed between the outer edge of the porous object 14 and the cavity wall of the cavity 131.
  • the porous object 14 is a mesh cloth 141, and the mesh cloth 141 can be made of a non-woven fabric 142.
  • the porous object 14 as the mesh cloth 141, thanks to the better permeability of the mesh cloth 141, the pores on it are distributed more uniformly and densely, so the cooperation with the micropores 115 can be achieved on the one hand.
  • the precise adjustment of the air flow in and out of the second chamber 112 can also improve the smoothness and uniformity of the air flow in and out of the second chamber 112 on the other hand.
  • the mesh cloth 141 is easy to obtain and low in manufacturing cost, which also reduces the overall manufacturing cost of the speaker 10.
  • the mesh cloth 141 can be formed by stacking a non-woven fabric 142 and a degreasing gauze layer 143, so that the mesh cloth 141 can effectively block the air while having the above advantages.
  • the small impurities in and out of the second chamber 112 can prevent the small impurities from flowing freely between the first chamber 111 and the second chamber 112, and prevent the small impurities from affecting the vibration of the diaphragm 123, which also improves the performance of the speaker 10 Sound quality.
  • the porous object 14 can also be set as a sponge or other material according to considerations such as cost.
  • the box body 11 further includes a PET film, and the PET film 15 covers the cover 13 toward the resonance On one side of the cavity 114, and between the PET film 15 and the cover plate 13, a first vent area 152 connected to the resonant cavity 114 is formed (as shown in FIG. 4); or, the PET film 15 covers the cover plate 13 and faces the resonance On one side of the cavity 114 and between the PET film 15 and the cover plate 13 is formed a second ventilation area 151 communicating with the second cavity 112 (as shown in FIG. 5 ).
  • a PET film 15 is used to replace the porous object 14, and the PET film 15 is covered on the cover plate 13, so as to enter and exit through the microhole 115.
  • the air flow in the second chamber 112 can enter the resonant cavity 114 through the first vent area 152 or enter the second chamber 112 through the first vent area 151 under the barrier of the PET film 15, and by controlling the first vent area
  • the size of the 152 or the area space of the first ventilation zone 151 can realize the effective adjustment of the air flow in and out of the second chamber 112, thus reducing the cost of adjusting the air flow in and out of the second chamber 112. Due to the good impact resistance and non-toxic properties of the PET film 15, the PET film 15 can be used in the loudspeaker 10 stably for a long time, and the environmental protection of the material of the loudspeaker 10 is also improved.
  • a number of ventilation holes 153 can be directly opened on the PET film 15 to make the PET film 15 breathable. After passing through the micro holes 115, the air flow entering and leaving the second chamber 112 can directly flow into the second chamber 112 or the resonant cavity 114 through the vent holes 153. This can simplify the vent structure of the PET film 15 and reduce the speaker 10 Overall manufacturing cost.
  • the inner wall of the enclosure frame 119 is provided with a connecting channel 18, and the connecting channel 18 is in communication with the resonant cavity 114, and the cross-sectional area of the connecting channel 18 is larger than that of the microhole 115.
  • the connecting channel 18 may be opened by mechanical processing, or may be formed during injection molding of the box body 11.
  • the velocity of the airflow entering the resonant cavity 114 from the first cavity 111 is greater than the velocity of the airflow entering the second cavity 112 from the resonant cavity 114, thereby The speed of the air flow exchange between the first chamber 111 and the second chamber 112 is reduced.
  • the cross-sectional area of the connecting channel 18 is 2 to 15 times the opening area of the microhole 115. Specifically, by making the cross-sectional area of the connecting passage 18 2 to 15 times the opening area of the microhole 115, the speed of the air flow exchange between the first chamber 111 and the second chamber 112 is achieved. Precise control.
  • the cross-sectional area of the connecting channel 18 is 4 to 9 times the opening area of the microhole 115.
  • the speed of the air flow exchange between the first chamber 111 and the second chamber 112 can be improved.
  • the pore diameter of the micropore 115 is 0.5 mm-2 mm. Specifically, by setting the aperture of the micropore 115 to be 0.5 mm to 2 mm, the air flow into and out of the second chamber 112 is effectively controlled in this way.

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Abstract

一种移动终端，包括壳体(21)和扬声器(10)，扬声器(10)包括盒体(11)和发声单元(12)，盒体(11)包括第一盖体(117)、第二盖体(118)和盖板(13)，发声单元(12)和第一盖体的内底壁之间形成第一腔室(111)，第一腔室(111)设出音口(113)，发声单元(12)和第二盖体(118)间形成第二腔室(112)，发声单元(12)具有振膜(123)，第一盖体(117)内形成有一侧设有通口(116)的谐振腔(114)，盖板(13)盖设于通口(116)上，并开设有微孔(115)，气流通过微孔(115)出入第二腔室(112)，使得振膜(123)振动时不会磕到发声单元(12)内的磁性件(125)。

Description

移动终端
本申请要求于2020年04月27日提交国家知识产权局、申请号为202010345451.4、申请名称为“移动终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请属于音频设备技术领域，尤其涉及一种移动终端。
背景技术
诸如手机、平板电脑或笔记本电脑等终端设备内均配备有扬声器，扬声器包括盒体和设置于盒体内的发声单元，扬声器应用于终端设备时，其盒体会通过出声口和外界环境相通。
现有技术中，由于扬声器和终端设备内部空间相连通，当终端设备的壳体受到按压，其内部空间体积发生变化时，扬声器盒体内的振膜的前方空间和后方空间的气压也会相应发生变化，如此会扰乱发声单元内的空气振动频率，导致振膜上下位移，出现杂音，并可能碰触到发声单元内的磁性件上，而受到损伤，同时也会导致扬声器出音时齿音和金属声较为明显。
发明内容
本申请实施例的目的在于提供一种移动终端，旨在解决现有技术中的移动终端的壳体受到按压，内部空间体积发生变化时，其内的扬声器出音时齿音和金属声较为明显的技术问题。
为实现上述目的，本申请采用的技术方案是：提供了一种移动终端，移动终端包括壳体和设置于所述壳体内的扬声器，所述扬声器包括盒体和用于发声的发声单元；所述盒体包括第一盖体、位于所述第一盖体上的第二盖体和盖板；所述发声单元设置于所述第一盖体内，并和所述第一盖体的内底壁之间形成有第一腔室，所述第一腔室开设有连通于所述壳体的外部环境的出音口；所述发声单元和所述第二盖体的内顶壁之间形成有第二腔室；所述发声单元具有用于振动发声的振膜，所述振膜的相对两面分别对应所述第一腔室和所述第二腔室；所述第一盖体内形成有谐振腔，所述谐振腔和所述第一腔室相连通，所述谐振腔朝向所述第二腔室的一侧开设有通口，所述盖板盖设于所述通口上，且所述盖板上开设有连通于所述第二腔室的微孔。
本申请实施例提供的移动终端，扬声器设置于其壳体内，扬声器的发声单元和盒体的第一盖体之间形成第一腔室，发声单元和盒体的第二盖体之间形成有第二腔室，发声单元所发出的声音通过出音口发出至外界环境，第一腔室通过谐振腔和第二腔室相连通，谐振腔的通口处设置有开设有微孔的盖板，谐振腔通过微孔和第二腔室相连通，这样盒体的第一腔室和第二腔室通过谐振腔即可维持气压平衡，进而使得发声单元的振膜正常振动。而由于第二腔室和谐振腔是通过微孔相连通的，那么微孔处所能够通过的气流流量较小，这样便会降低第二腔室内气流的流通性，当盒体受到压迫，或自压迫状态回复至正常状态的过程中，气流通过微孔出入第二腔室，这便使得第二腔室的内部气压不会发生明显的变化，而由于第一腔室通过出音口和外界环境连通， 那么第一腔室的内部气压也不会发生明显变化，那么也使得发声单元的振膜在振动时，其振幅能够保持在合理范围内，这样便也使得振膜在振动时不会磕碰到发声单元内的磁性件上，如此便有效抑制了扬声器在出音时，尤其是发出高频音时的齿音和金属音，提升了扬声器的高频音出音质感。
可选地，所述第一盖体内设置有围框，所述发声单元嵌设于所述围框内，所述第一盖体的内侧壁和所述围框的外侧壁之间间隔形成有第一区域，所述第一区域内设置有块体物件，所述谐振腔开设于所述块体物件内。通过使得第一盖体的内壁和围框的外壁之间间隔形成有第一区域，谐振腔开设于第一区域内的块体物件内，这样便充分利用了盒体内的装配空间，实现了谐振腔相对于第一腔室和第二腔室的独立设置。
可选地，所述盒体还包括多孔物件，所述多孔物件设置于所述盖板上并覆盖于所述微孔。通过在盖板上覆设多孔物件，并使得多孔物件覆盖微孔，这样多孔物件和微孔相结合，便实现了对出入第二腔室的气流流量的进一步限制，从而进一步稳定了第二腔室的内部气压。
可选地，所述多孔物件贴设于所述盖板朝向或背向所述谐振腔的一侧。
可选地，所述盖板朝向或背向所述谐振腔的一侧开设有凹腔，所述多孔物件嵌设于所述凹腔内，所述微孔开设于所述凹腔的底部。通过在盖板上开设凹腔，并使得多孔物件嵌设于凹腔内，这样一方面提升了多孔物件和盖板相连接的稳定性，另一方面也有利于多孔物件相对于盖板的快速拆换。
可选地，所述多孔物件的外边缘和所述凹腔的腔壁之间形成有间隙。
可选地，所述多孔物件为网布，所述网布采用无纺布制成；
或者，所述网布采用无纺布和脱脂纱布层叠形成。通过将多孔物件具体设定为网布，那么得益于网布较佳的通透性，其上孔洞分布较为均匀细密，那么其和微孔相配合一方面能够实现对出入第二腔室的气流流量的精确调节。
可选地，所述盒体还包括PET薄膜，所述PET薄膜覆盖于所述盖板朝向所述谐振腔的一侧，且所述PET薄膜和所述盖板之间形成有连通于所述谐振腔的第一通气区。
可选地，所述盒体还包括PET薄膜，所述PET薄膜覆盖于所述盖板背向所述谐振腔的一侧，且所述PET薄膜和所述盖板之间形成有连通于所述第二腔室的第二通气区。
可选地，所述盒体还包括PET薄膜，所述PET薄膜覆盖于所述盖板朝向或背向所述谐振腔的一侧，所述PET薄膜上开设有若干透气孔。
可选地，所述第一腔室的腔壁开设有连接通道，所述连接通道贯通于所述围框和所述块体物件并和所述谐振腔相连通，所述连接通道的截面积大于所述微孔的开孔面积。通过使得连接通道的截面积大于微孔的开孔面积，这样便使得气流从第一腔室进入谐振腔的速度大于气流自谐振腔进入第二腔室的速度，从而降低了气流在第一腔室和第二腔室之间交换的速度。
可选地，所述连接通道的截面积是所述微孔的开孔面积的2倍～15倍。这样便实现了对气流在第一腔室和第二腔室之间交换的速度的精确控制。
可选地，所述微孔的孔径为0.5mm～2mm。这样便有效控制了出入第二腔室的气流流量。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术附图；
图2为本申请实施例提供的移动终端和扬声器的结构示意图；
图3为本申请实施例提供的扬声器的剖切结构示意图一；
图4为本申请实施例提供的扬声器的剖切结构示意图二；
图5为本申请实施例提供的扬声器的剖切结构示意图三；
图6为本申请实施例提供的扬声器的剖切结构示意图四；
图7为本申请实施例提供的扬声器的***结构示意图；
图8为本申请实施例提供的扬声器的部分结构示意图一；
图9为本申请实施例提供的扬声器的部分结构示意图二；
图10为本申请实施例提供的扬声器的网布的横截面剖视图；
图11为本申请实施例提供的扬声器的部分结构示意图三。
其中，图中各附图标记：
10—扬声器              11—盒体               12—发声单元
13—盖板                14—多孔物件           15—PET薄膜
16—第一区域            17—块体物件           18—连接通道
20—移动终端            21—壳体               22—缺口
30—发生装置            31—泄气孔             111—第一腔室
112—第二腔室           113—出音口            114—谐振腔
115—微孔               116—通口              117—第一盖体
118—第二盖体           119—围框              121—盆架
122—音圈               123—振膜              124—华司
125—磁性件             126—铁芯              127—柔性电路板
131—凹腔               141—网布              142—无纺布
143—脱脂纱布层         151—第一通气区        152—第二通气区
153—透气孔。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图1～图11描述的实施例是示例性的，旨在用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“长度”、“宽度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
为方便理解，下面先对本申请所涉及的技术术语进行解释和描述。
扬声器：是一种把电信号转变为声信号的换能器件，其通过电驱动其内的音圈振动，并带动振膜振动，以使其周围的空气产生共振，进而发出声音。
PET(Polyethylene-terephthalate)：是指含有聚对苯二甲酸乙二醇酯的一种热塑性聚酯，其为对苯二甲酸与乙二醇的缩聚物，业界俗称涤纶树脂。
无纺布：由定向的或随机的纤维制成，具有防潮、透气、柔韧、质轻、不助燃、易分解等诸多优点。
脱脂纱布：是指经过脱脂处理的纯棉纱布。
图1为现有技术中的发音装置30的结构示意图，其表示了发音装置30的外壳开设有泄气孔31。当发音装置30装配于外界的终端设备内时，发音装置的泄气孔31与终端设备的内部空间相连通。
如图2所示，本申请实施例提供了一种移动终端20，其包括壳体21和设置于壳体21内的扬声器10。其中，移动终端20包括但不限于手机、平板电脑、笔记本电脑、超级移动个人计算机(ultra-mobile personal computer，UMPC)、上网本、或个人数字助理(personal digital assistant，PDA)等，尤其是防水密封性较高的移动终端20，本申请实施例对移动终端20的具体类型不作任何限制。
参考图2和图3，扬声器10包括盒体11和用于发声的发声单元12，盒体11包括第一盖体117、位于第一盖体117上的第二盖体118和盖板13，发声单元12设置于第一盖体117内，并和第一盖体117的内底壁之间形成有第一腔室111，第一腔室111开设有连通于壳体21的外部环境的出音口113，移动终端20的壳体21对应扬声器10的出音口113的位置开设有缺口22，以使得扬声器10发出的声音传导至外界环境，发声单元12和第二盖体118的内顶壁之间形成有第二腔室112。
本申请实施例中，发声单元12可以是球顶式发声单元、舌簧式发声单元或纸盆式发声单元等等。参考图3～图5，发声单元12的基本组成可包括盆架121、设置于盆架121内的音圈122和环绕于音圈122外周并外露于盆架121的振膜123，振膜123的下方依序设置有华司124和磁性件125、磁性件125下方设置有铁芯126，参考图7，扬声器10还引出有用于和移动终端20内的相关电器件电性连接的柔性电路板127。
参考图2～图4，发声单元12的振膜123的相对两面分别对应第一腔室111和第二腔室112，第一盖体117内形成有谐振腔114，谐振腔114和第一腔室111相连通，谐振腔114朝向第二腔室112的一侧开设有通口116，盖板13盖设于通口116上，且盖 板13上开设有连通于第二腔室112的微孔115。在本实施例中，振膜123背离磁性件125的一面对应第一腔室111设置，振膜123朝向磁性件125的一面对应第二腔室112设置。
更具体地，有别于现有技术中在发声装置30的外壳开设和终端设备的内部相连通的泄气孔31的设计，(如图1所示)，在本申请实施例中，扬声器10的第二腔室112和移动终端20的壳体21的内部空间不相连通。如图2～图4所示，谐振腔114通过微孔115和第二腔室112相连通。
如图3所示，以下对本申请实施例提供的扬声器10作进一步说明：本申请实施例提供的扬声器10，其发声单元12设置于盒体11内，并和盒体11的第一盖体117之间形成第一腔室111，发声单元12和盒体11的第二盖体118之间则形成有第二腔室112，发声单元12所发出的声音通过出音口113发出至外界环境，第一腔室111通过谐振腔114和第二腔室112相连通，谐振腔114的通口116处设置有开设有微孔115的盖板13，谐振腔114通过微孔115和第二腔室112相连通，这样扬声器10的第一腔室111和第二腔室112通过谐振腔114即可维持气压平衡，进而使得发声单元10的振膜123正常振动。而由于第二腔室112和谐振腔114是通过微孔115相连通的，那么微孔115处所能够通过的气流流量较小，这样便会降低第二腔室112内气流的流通性，这样当盒体11受到压迫，或自压迫状态回复至正常状态的过程中，气流通过微孔115出入第二腔室112，这便使得第二腔室112的内部气压不会发生明显的变化，而由于第一腔室111通常出音口113和外界环境连通，那么第一腔室111的内部气压也不会发生明显变化，那么也使得发生单元12的振膜123在振动时，其振幅能够保持在合理范围内，如此便也使得振膜123在振动时不会磕碰到发声单元12内的磁性件125上，如此便有效抑制了扬声器10在出音时，尤其是发出高频音时的齿音和金属音，提升了扬声器10的高频音出音质感。
而通过在谐振腔114的一侧开设通口116，并将微孔115形成于盖设于通口116上的盖板13上，这样当需要改变调整微孔115的孔径大小时，即可对盖板13进行拆换，替换为具有相应孔径的微孔115的盖板13即可，如此便实现了对微孔115孔径的灵活调整。
可选地，盖板13可嵌装于通口116处，以提升盖板13相对于第二腔室112的拆换便利性，亦可通过打胶或热熔粘合等方式粘设于通口116外边缘，以提升盖板13相对于第二腔室112的装配稳定性。
可选地，微孔115可以是圆孔、椭圆孔或矩形孔等异形孔。微孔115孔型的具体选择可根据第二腔室112设计的交换气流流量来确定。
在本申请的另一些实施例中，如图5～图7所示，第一盖体117内设置有围框119，发声单元12嵌设于围框119内，第一盖体117的内壁和围框119的外壁之间间隔形成有第一区域16，第一区域16内设置有块体物件17，谐振腔114开设于块体物件17内，连接通道18贯通于围框119和块体物件17并和谐振腔114相连通。
具体地，发声单元12和围框119之间可通过打胶密封，这样一方面实现了第一腔室111和第二腔室112的隔离密封，另一方面也使得发声单元12和围框119之间通过胶质进行缓冲，消除了发声单元12和围框119之间相互磕碰产生的多余振动，提升了 发声单元12的出音效果。
而通过使得第一盖体117的内壁和围框119的外壁之间间隔形成有第一区域16，谐振腔114开设于第一区域16内的块体物件17内，这样便充分利用了盒体11内的装配空间，实现了谐振腔114相对于第一腔室111和第二腔室112的独立设置。
可选地，块体物件17可以是和第一盖体117一体成型制得，如此便降低了盒体11的制造成本。而块体物件17也可以是单独制备成型，再嵌装或胶粘于第一区域16内。这样可使得块体物件17和第一盖体117的材质不必保持相同，比如第一盖体17可采用塑料件制成，而块体物件17可选用金属件制成等。同时，块体物件的形状可以是呈方块或异形块，其形状可根据第一区域16留存的装配空间的大小和形状而定。
在本申请的另一些实施例中，如图3、图7和图8所示，盒体11还包括多孔物件14，多孔物件14设置于盖板13上并覆盖于微孔115。
具体地，通过在盖板13上覆设多孔物件14，并使得多孔物件14覆盖微孔115，这样多孔物件14和微孔115相结合，便实现了对出入第二腔室112的气流流量的进一步限制，从而进一步稳定了第二腔室112的内部气压。
可选地，多孔物件14可通过双面胶等可拆换地覆设于盖板13上，这样可通过更换不同厚度的多孔物件14以实现对出入第二腔室112的气流流量进一步精确调节，进而实现对第二腔室112的内部气压的精确调控。
在本申请的另一些实施例中，多孔物件14贴设于盖板13朝向或背向谐振腔114的一侧。
具体地，可根据盖板13朝向或背向谐振腔114的一侧的装配空间大小以选择将多孔物件14装设于盖板13朝向或背向谐振腔114的一侧。
在本申请的另一些实施例中，如图7～图9所示，盖板13朝向或背向谐振腔114的一侧开设有凹腔131，多孔物件14嵌设于凹腔131内，微孔115开设于凹腔131的底部。
具体地，通过在盖板13上开设凹腔131，并使得多孔物件14嵌设于凹腔131内，这样一方面提升了多孔物件14和盖板13相连接的稳定性，另一方面也有利于多孔物件14相对于盖板13的快速拆换。
可选地，多孔物件14粘贴于凹腔131内，这样则提升了多孔物件14在凹腔131内的装配稳定性。同时，多孔物件14的外边缘可通过打胶或贴设双面胶和凹腔131的腔壁或是凹腔131底部的边缘处相连接，这样气流在经过微孔115流至多孔物件14时，便不会自多孔物件14和凹腔131腔壁之间的缝隙处流出，而是大部分通过多孔物件14再流入第二腔室112或谐振腔114内。这样便提升了对多孔物件14的利用率，充分发挥了多孔物件14阻滞气流的作用。
在本申请的另一些实施例中，多孔物件14的外边缘和凹腔131的腔壁之间形成有间隙。
具体地，通过使得多孔物件14的外边缘和凹腔131的腔壁之间形成间隙，这样可便于将多孔物件14抠出凹腔131，使得多孔物件14能够自凹腔131快速取出，也提升了多孔物件14相对于凹腔131的装配便利性。
在本申请的另一些实施例中，多孔物件14为网布141，网布141可采用无纺布142 制成。
具体地，通过将多孔物件14具体设定为网布141，那么得益于网布141较佳的通透性，其上孔洞分布较为均匀细密，那么其和微孔115相配合一方面能够实现对出入第二腔室112的气流流量的精确调节，另一方面也能够提升出入第二腔室112的气流的顺畅性和均匀性。同时，网布141易获取且制造成本低廉，这样也降低了扬声器10的整体制造成本。
而得益于无纺布142透气、柔韧，质轻且无毒的优势，其能够在实现对出入第二腔室112的气流流量进行有效控制的同时，也提升了扬声器10的选材环保性。
在本申请的另一些实施例中，如图10所示，网布141可采用无纺布142和脱脂纱布层143叠形成，这样网布141在具有上述优势的同时，还能够有效阻拦空气中的细小杂质出入第二腔室112，进而可阻止细小杂质在第一腔室111和第二腔室112之间游离流动，避免细小杂质对振膜123振动造成影响，如此也提升了扬声器10的出音品质。
可选地，多孔物件14还可根据成本等方面的考虑被设定为海绵等材质。
在本申请的另一些实施例中，如图4、图5和图11所示，作为替代多孔物件14的一种方式，盒体11还包括PET薄膜，PET薄膜15覆盖于盖板13朝向谐振腔114的一侧，且PET薄膜15和盖板13之间形成有连通于谐振腔114的第一通气区152(如图4所示)；或者，PET薄膜15覆盖于盖板13背向谐振腔114的一侧，且PET薄膜15和盖板13之间形成有连通于第二腔室112的第二通气区151(如图5所示)。
具体地，如图4、图5和图11所示，在本实施例中，采用PET薄膜15来替换多孔物件14，通过将PET薄膜15覆盖于盖板13上，这样经由微孔115出入第二腔室112气流便可在PET薄膜15的阻挡下经由第一通气区152进入到谐振腔114内或是经由第一通气区151进入到第二腔室112内，而通过控制第一通气区152或第一通气区151的区域空间的大小即可实现对出入第二腔室112的气流流量的有效调节，如此便降低了调节出入第二腔室112的气流流量的成本。而由于PET薄膜15良好的抗冲击性能和无毒特性，这样便使得PET薄膜15能够在扬声器10内长期稳定服役的同时，也提升了扬声器10的选材环保性。
可选地，如图6所示，作为取消第一通气区152或第一通气区151的设计的替代方式，可直接在PET薄膜15上开设若干透气孔153，以使得PET薄膜15具有透气性，出入第二腔室112的气流在经过微孔115后可直接通过各透气孔153流入第二腔室112或谐振腔114内，如此可使得PET薄膜15的透气结构简化，进而降低扬声器10的整体制造成本。
在本申请的另一些实施例中，如图7～图9所示，围框119的内壁开设有连接通道18，连接通道18和谐振腔114相连通，连接通道18的截面积大于微孔115的开孔面积。具体地，连接通道18可通过机械加工的方式开设，亦可在盒体11注塑成型时形成。
而通过使得连接通道18的截面积大于微孔115的开孔面积，这样便使得气流从第一腔室111进入谐振腔114的速度大于气流自谐振腔114进入第二腔室112的速度，从而降低了气流在第一腔室111和第二腔室112之间交换的速度。
在本申请的另一些实施例中，连接通道18的截面积是微孔115的开孔面积的2倍～15倍。具体地，通过使得连接通道18的截面积为微孔115的开孔面积的2倍～15倍，这样便实现了对气流在第一腔室111和第二腔室112之间交换的速度的精确控制。
可选地，连接通道18的截面积是微孔115的开孔面积的4倍～9倍。具体地，通过使得连接通道18的截面积为微孔115的开孔面积的4倍～9倍，这样便在实现对气流在第一腔室111和第二腔室112之间交换的速度的精确控制的同时，也避免了微孔115的开孔面积为满足其和连接通道18的截面积的倍数关系而做的过小，进而一方面控制了出入第二腔室112的气流流量，另一方面也降低了微孔115开孔难度。
在本申请的另一些实施例中，微孔115的孔径为0.5mm～2mm。具体地，通过将微孔115的孔径设定为0.5mm～2mm，这样便有效控制了出入第二腔室112的气流流量。
以上仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。

Claims (13)

  1. 一种移动终端，其特征在于：包括壳体和设置于所述壳体内的扬声器，所述扬声器包括盒体和用于发声的发声单元；
    所述盒体包括第一盖体、位于所述第一盖体上的第二盖体和盖板；
    所述发声单元设置于所述第一盖体内，并和所述第一盖体的内底壁之间形成有第一腔室，所述第一腔室开设有连通于所述壳体的外部环境的出音口；
    所述发声单元和所述第二盖体的内顶壁之间形成有第二腔室；
    所述发声单元具有用于振动发声的振膜，所述振膜的相对两面分别对应所述第一腔室和所述第二腔室；
    所述第一盖体内形成有谐振腔，所述谐振腔和所述第一腔室相连通，所述谐振腔朝向所述第二腔室的一侧开设有通口，所述盖板盖设于所述通口上，且所述盖板上开设有连通于所述第二腔室的微孔。
  2. 根据权利要求1所述的移动终端，其特征在于：所述第一盖体内设置有围框，所述发声单元嵌设于所述围框内，所述第一盖体的内侧壁和所述围框的外侧壁之间间隔形成有第一区域，所述第一区域内设置有块体物件，所述谐振腔设置于所述块体物件内。
  3. 根据权利要求2所述的移动终端，其特征在于：所述盒体还包括多孔物件，所述多孔物件设置于所述盖板上并覆盖于所述微孔。
  4. 根据权利要求3所述的移动终端，其特征在于：所述多孔物件贴设于所述盖板朝向或背向所述谐振腔的一侧。
  5. 根据权利要求3所述的移动终端，其特征在于：所述盖板朝向或背向所述谐振腔的一侧开设有凹腔，所述多孔物件嵌设于所述凹腔内，所述微孔开设于所述凹腔的底部。
  6. 根据权利要求5所述的移动终端，其特征在于：所述多孔物件的外边缘和所述凹腔的腔壁之间形成有间隙。
  7. 根据权利要求3所述的移动终端，其特征在于：所述多孔物件为网布，所述网布采用无纺布制成；
    或者，所述网布采用无纺布和脱脂纱布层叠形成。
  8. 根据权利要求1或2所述的移动终端，其特征在于：所述盒体还包括PET薄膜，所述PET薄膜覆盖于所述盖板朝向所述谐振腔的一侧，且所述PET薄膜和所述盖板之间形成有连通于所述谐振腔的第一通气区。
  9. 根据权利要求1或2所述的移动终端，其特征在于：所述盒体还包括PET薄膜，所述PET薄膜覆盖于所述盖板背向所述谐振腔的一侧，且所述PET薄膜和所述盖板之间形成有连通于所述第二腔室的第二通气区。
  10. 根据权利要求1或2所述的移动终端，其特征在于：所述盒体还包括PET薄膜，所述PET薄膜覆盖于所述盖板朝向或背向所述谐振腔的一侧，所述PET薄膜上开设有若干透气孔。
  11. 根据权利要求2～7任一项所述的移动终端，其特征在于：所述围框的内壁开 设有连接通道，所述连接通道贯通于所述围框和所述块体物件并和所述谐振腔相连通，所述连接通道的截面积大于所述微孔的开孔面积。
  12. 根据权利要求11所述的移动终端，其特征在于：所述连接通道的截面积是所述微孔的开孔面积的2倍～15倍。
  13. 根据权利要求1～7任一项所述的移动终端，其特征在于：所述微孔的孔径为0.5mm～2mm。
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