WO2015027521A1 - Earphone - Google Patents

Earphone Download PDF

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Publication number
WO2015027521A1
WO2015027521A1 PCT/CN2013/082805 CN2013082805W WO2015027521A1 WO 2015027521 A1 WO2015027521 A1 WO 2015027521A1 CN 2013082805 W CN2013082805 W CN 2013082805W WO 2015027521 A1 WO2015027521 A1 WO 2015027521A1
Authority
WO
WIPO (PCT)
Prior art keywords
adjusting component
chamber
earphone
hole
rear wall
Prior art date
Application number
PCT/CN2013/082805
Other languages
French (fr)
Inventor
Helen Chen
Original Assignee
Harman International Industries, Incorporated
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 Harman International Industries, Incorporated filed Critical Harman International Industries, Incorporated
Priority to CN201380080057.0A priority Critical patent/CN105874817B/en
Priority to PCT/CN2013/082805 priority patent/WO2015027521A1/en
Publication of WO2015027521A1 publication Critical patent/WO2015027521A1/en

Links

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
    • H04R1/22Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807Enclosures comprising vibrating or resonating arrangements
    • H04R1/2838Enclosures comprising vibrating or resonating arrangements of the bandpass type
    • H04R1/2846Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
    • H04R1/2849Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers
    • 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
    • H04R1/10Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1041Mechanical or electronic switches, or control elements
    • 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
    • H04R1/22Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807Enclosures comprising vibrating or resonating arrangements
    • H04R1/2838Enclosures comprising vibrating or resonating arrangements of the bandpass type
    • H04R1/2842Enclosures comprising vibrating or resonating arrangements of the bandpass type for loudspeaker transducers
    • 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
    • H04R1/10Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1016Earpieces of the intra-aural type
    • 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
    • H04R1/10Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058Manufacture or assembly

Definitions

  • the present disclosure generally relates to an earphone, more particularly a bass controllable earphone.
  • an earphone may include: a shell which defines an inner chamber; an acoustoelectric transducer disposed inside the inner chamber and dividing the inner chamber into a front chamber and a rear chamber; at least one through hole formed on a rear wall of the rear chamber, which rear wall is substantially opposite to the transducer; and an adjusting component which can be switched between a first position and a second position, where in the first position, the at least one through hole is sealed by the adjusting component, and in the second position, the rear chamber and outside space are in fluid communication through the at least one through hole.
  • the earphone may further include at least one blind hole formed on the rear wall, and at least one plug extending from the adjusting component, when the adjusting component is in the first position, the at least one plug is inserted into the at least one through hole such that the at least one through hole is sealed, and when the adjusting component is in the second position, the at least one plug is inserted into the at least one blind hole.
  • the earphone may further include a removable sealing component, when the adjusting component is in the first position and the sealing ring is mounted on the earphone, an additional chamber is formed by the rear wall, the seal component and the adjusting component, and the additional component is isolated.
  • the rear chamber may be double sealed, and thus bass volume may be further suppressed.
  • the removable sealing component may be a ring including a flexible material.
  • the adjust component and the rear wall may respectively include a first magnet and a second magnet, when the adjusting component is in the first position or the second position, the first magnet and the second magnet can pull the adjusting component and the rear wall toward each other.
  • the adjusting component may occupy some space of the rear chamber when in the first position.
  • an earphone may include: a shell which defines an inner chamber; an acoustoelectric transducer disposed inside the inner chamber and dividing the inner chamber into a front chamber and a rear chamber; at least one through hole extending from the rear chamber to outside space; and an adjusting component which can be switched between a first position and a second position, where in the first position, the at least one through hole is sealed by the adjusting component, and in the second position, the rear chamber and outside space are in fluid communication through the at least one through hole, where the adjusting component is disposed in a rear part of the earphone when in the first position and the second position.
  • FIG. 1 schematically illustrates a three-dimensional view of an earphone 100 according to one embodiment
  • FIG. 2 schematically illustrates an assembly view of the earphone 100
  • FIG. 3 schematically illustrates a three-dimensional view of a rear housing of the earphone 100
  • FIG. 4 schematically illustrates a three-dimensional view of an adjusting component of the earphone 100
  • FIG. 5 schematically illustrates bass volume of the earphone 100 in different bass modes
  • FIG. 6 schematically illustrates a three-dimensional view of an earphone 200 according to one embodiment.
  • FIG. 1 schematically illustrates a three-dimensional view of an earphone 100 according to one embodiment.
  • the earphone 100 is an in-ear type, while applications of other earphone kinds may be simply conceived based on following detail descriptions.
  • the earphone 100 may include a shell 110 which defines an inner chamber. At a front end of the shell 110, there may be provided with an ear cushion 130. The front end of the shell 110 may be put into an auditory meatus of a user, so the ear cushion 130 may ease the pressure between the shell 110 and the auditory meatus.
  • An acoustoelectric transducer for converting electric signals into sound may be disposed inside of the shell 110, dividing the inner chamber into a front chamber closer to the front end and a rear chamber closer to a back end opposite to the front end.
  • Bass volume of the earphone 100 may be highly relevant to the acoustic compliance of the rear chamber. If the rear chamber has a low acoustic compliance value, the bass volume may be suppressed, vice versa.
  • the acoustic compliance value of the rear chamber may be calculated based on Equation (1 ):
  • At least one through hole may be formed on the shell 110.
  • the at least one through hold may extend from the rear chamber to outside space, such that the rear chamber and outside space may be in fluid communication through the at least one through hole.
  • An adjusting component 150 may be provided to open or seal the at least one though hole. When the at least one through hole is completely opened, the rear chamber and the outside space may be in fluid communication, thus the volume of the rear chamber may be taken as infinite and the inner pressure may equal to the atmospheric pressure. As a result, the acoustic compliance value of the rear chamber may be relatively large and the bass volume may be increased.
  • the volume of the rear chamber becomes a constant and the inner pressure of the rear chamber may increase along with membrane vibration of the acoustoelectric transducer.
  • the acoustic compliance value of the rear chamber may be relatively small and the bass volume may be suppressed. Therefore, the bass volume of the earphone may become controllable by changing the position of the adjusting component 150. Specifically, when the adjusting component 150 is in a first position, the at least one through hole may be sealed, thus the bass volume may be reduced. When the adjusting component 150 is in a second position, the at least one through hole may be open, thus the bass volume may be increased.
  • FIG. 2 schematically illustrates an assembly view of the earphone 100.
  • the shell of the earphone 100 may include two parts, a front housing 111 and a rear housing 113. It should be noted that, in some embodiments, the front housing 111 and the rear housing 113 may be formed as an integral structure.
  • a speaker 170 may be disposed inside of the shell, constituting the front chamber and the rear chamber with the front housing 111 and the rear housing 113, respectively.
  • the ear cushion 130 may be mounted on a protruding pipe of the front housing 111 , which pipe may be called as a sound guiding pipe.
  • the at least one through hole may be formed on a rear wall of the rear housing 113 which may be substantially opposite to the speaker 170.
  • the adjusting component 150 may fill up or free up the at least one through hole.
  • FIG. 3 schematically illustrates a three-dimensional view of the rear housing 113 of the earphone 100
  • FIG. 4 schematically illustrates a three-dimensional view of the adjusting component 150 of the earphone 100.
  • a set of through holes 1131 may be formed on the rear wall of the rear housing 113
  • the adjusting component 150 may include a cover 1501 and a set of plugs 1503 formed on a first side of the cover 1501 .
  • the number, size, shape and distribution of the through holes 1131 may be corresponding to those of the plugs 1503, such that the through holes 1131 may be completely blocked by the plugs 1503 when the adjusting component 150 is in the first position, i.e., when the plugs 1503 are put into the through holes 1131 . Therefore, the rear chamber may be sealed and the bass volume of the earphone 100 may be suppressed.
  • the adjusting component 150 is in the second position, i.e., when the plugs 1503 are out of the through holes 1131 , the rear chamber may be fluidly communicated with the outside space and thus the bass volume may be increased. Therefore, a bass-suppress or bass-enhance mode may be simply achieved by switching the adjusting component 150 between the first position and the second position.
  • the length of the plugs 1503 may be larger than the depth of the through holes 1131 , so that the plugs 1503 may occupy some space of the rear chamber when put into the through holes 1131 .
  • the adjusting component 150 when the adjusting component 150 is in the first position, not only the rear chamber may be sealed, but also the volume of the rear chamber may be reduced, further suppressing the bass volume.
  • the adjusting component 150 may include a first magnet 1505, and the rear wall of the rear housing 113 may include a second magnet 1133.
  • an attraction force may be generated between the two magnets 1505 and 1133, so that the first magnet 1505 and the second magnet 1133 can pull the adjusting component and the rear wall toward each other. Therefore, the adjusting component 150 can be attached on the rear wall of the rear housing 113 stably when the adjusting component 150 is in the first position.
  • the attraction force may enhance the attachment between the first side of the cover 1501 and the rear wall of the rear housing 113, improving the sealing of the rear chamber.
  • the first magnet 1505 may be fixed in a recess on the first side of the cover 1501
  • the second magnet 1133 may be fixed in a recess on the rear wall of the rear housing 113.
  • Using magnetic force to achieve a movable conjunction between the rear housing 113 and the adjusting component 150 is merely an example.
  • Other embodiments may be practical, as long as a user can conveniently switch the adjusting component 150 between the first and second positions and the adjusting component 150 can be attached on the rear housing 113 stably when the rear chamber is sealed.
  • a spring may be provided with one end connected with the first side of the cover 1501 and another end connected with the rear wall of the rear housing 113. The elasticity of the spring can hold the adjusting component 150 on the rear wall of the rear housing 113 when the adjusting component 150 is in the first position. To open the through holes 1133, the user may only need to pull the plugs 1503 out against the elasticity.
  • a set of blind holes 1135 may be formed on the rear wall of the rear housing 113.
  • the blind holes 1135 may be used for accommodating the plugs 1503 when the plugs 1503 are pulled out from the through holes 1131 , i.e., when the adjusting component is in the second position. With the attraction force, the adjusting component 150 can also be attached to the rear wall of the rear housing 113 when the rear chamber is fluidly communicated with the outside space, thereby making the earphone 100 more compact. Similar to the through holes 1131 , the number, shape, size and distribution of the blind holes 1135 may be corresponding to those of the plugs 1501 .
  • the size of cross-sections of the blind holes 1135 may be slightly larger than that of the plugs 1501 , so that the blind holes 1135 can easily accommodate the plugs 1501 .
  • the depth of the blind holes 1135 may be less than the length of the plugs 1501 .
  • a space may be maintained between the rear wall of the rear housing 113 and the cover 1501 when the plugs 1501 are put into the blind holes 1135, thus the rear chamber can be fluidly communicated with the outside space.
  • the earphone 100 may further include a sealing component for reducing air leakage which may occur when the adjusting component 150 is in the first position, so as to enhance the sealing of the rear chamber and further suppress the bass. Referring back to FIG.
  • a ring 190 may be arranged between the rear wall of the rear housing 113 and the cover 1501 of the adjusting component 150.
  • the ring 190 may include a flexible material, such as silicon or thermoplastic elastomer (TPE).
  • TPE thermoplastic elastomer
  • the ring 190 may be fixed, for example, either on the rear wall of the rear housing 113 or on the first side of the cover 1501 .
  • edges of the rear wall of the rear housing 113 and the cover 1501 may be softened, for instance, using a double injection process, and an enhanced sealing may also be achieved.
  • the ring 190 may be movable.
  • the ring 190 may be disposed on the rear wall of the rear housing 113 when the adjusting component 150 is in the first position, and may be move away from the rear wall of the rear housing 113 when the adjusting component 150 is in the second position. Accordingly, there may be at least three bass modes to be selected by the user.
  • the plugs 1503 By putting the plugs 1503 into the blind holes 1135, the through holes 1131 are opened and the rear chamber is fluidly communicated with the outside space, thus a bass-enhance mode (Bass-mode I) may be obtained.
  • Bas-mode I bass-enhance mode
  • FIG. 5 schematically illustrates bass volume of the earphone 100 in different bass modes.
  • the horizontal axis stands for the sound frequency
  • the vertical axis stands for the sound volume. It could be seen from FIG. 5 that, in three bass modes, sound volumes are distinct, especially in low frequency (bass) regions.
  • the through holes 1131 may be formed on the rear wall of the rear housing 113. Therefore, the adjusting component 150 can be attached on the rear wall of the rear housing 113 when it is in the first position and/or the second position. As a result, the adjusting component 150 may not occupy space around lateral surface of the shell 110.
  • the lateral surface of the shell 110 may be between the front end and back end of the shell 110.
  • some region of the lateral surface may be contact with or very close to the ear of the user.
  • the adjusting component 150 may not affect comfortable wearing of the earphone 100, as it may be disposed at least in the rear part of the earphone 100.
  • the lateral surface may be crowded because some components, such as a pipe for guiding an earphone line, are normally designed on the lateral surface. However, the adjusting component 150 may not affect these components.
  • through holes may not be necessarily formed on the rear wall of the rear housing.
  • the adjusting component can still be disposed in the rear part of the earphone when in the first and second positions, even if the through holes are arranged at other positions of the earphone shell.
  • FIG. 6 schematically illustrates a three-dimensional view of an earphone 200 according to one embodiment.
  • the earphone 200 may include a front housing 210 and a rear housing 230 together constituting an earphone shell.
  • An acoustoelectric transducer may be disposed inside the shell, constituting a front chamber with the front housing 210 and a rear chamber with the rear housing 230.
  • At least one through hole 231 may be formed on a lateral wall of the rear housing 230, through which the rear chamber can be fluidly communicated with the outside space.
  • the rear housing 230 may be open at its back end, with a thread arranged on inner side of its lateral wall near the back end.
  • An adjusting component may be provided to open or close the through hole 231 .
  • the adjusting component may include a cover 251 and a screw 253 mounted on a side of the cover 251 .
  • the screw 253 may be corresponding to the thread 233.
  • a distance from the through hole 231 to the back end of the rear housing 230 may be less than a length of the screw 253. Therefore, when the screw 253 is screwed into the thread 233 to a first position, the through hole 231 may be blocked, thus the rear chamber may be sealed.
  • the screw 253 is screwed up to a second position, the through hole 231 may be opened, thus the rear chamber is fluidly communicated with the outside space.
  • a sealing component for reducing air leakage such as a ring 270 may be provided.
  • the ring 270 may be similar to the ring 190 of the earphone 100 in above description. Therefore, at least three bass modes may be achieved. Detail operations may be based on above descriptions.
  • the adjusting component of the earphone 200 may not occupy space around lateral surface of the shell of the earphone 200. Further, the adjusting component may adjust the volume of the rear chamber by screwing the screw 253 into or out of the thread 233.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Headphones And Earphones (AREA)

Abstract

An earphone is provided. The earphone may include: a shell which defines an inner chamber; an acoustoelectric transducer disposed inside the inner chamber and dividing the inner chamber into a front chamber and a rear chamber; at least one through hole formed on a rear wall of the rear chamber, which rear wall is substantially opposite to the transducer; and an adjusting component which can be switched between a first position and a second position, where in the first position, the at least one through hole is sealed by the adjusting component, in the second position, the rear chamber and outside space are in fluid communication through the at least one through hole. Bass volume of the earphone may be controllable.

Description

EARPHONE
TECHNICAL FIELD
[0001] The present disclosure generally relates to an earphone, more particularly a bass controllable earphone.
BACKGROUND
[0002] Different earphone users may have different requirements for bass, an earphone whose bass is tunable is needed to satisfy different requirements for bass.
SUMMARY
[0003] According to one embodiment, an earphone is provided. The earphone may include: a shell which defines an inner chamber; an acoustoelectric transducer disposed inside the inner chamber and dividing the inner chamber into a front chamber and a rear chamber; at least one through hole formed on a rear wall of the rear chamber, which rear wall is substantially opposite to the transducer; and an adjusting component which can be switched between a first position and a second position, where in the first position, the at least one through hole is sealed by the adjusting component, and in the second position, the rear chamber and outside space are in fluid communication through the at least one through hole.
[0004] In some embodiments, the earphone may further include at least one blind hole formed on the rear wall, and at least one plug extending from the adjusting component, when the adjusting component is in the first position, the at least one plug is inserted into the at least one through hole such that the at least one through hole is sealed, and when the adjusting component is in the second position, the at least one plug is inserted into the at least one blind hole.
[0005] In some embodiments, the earphone may further include a removable sealing component, when the adjusting component is in the first position and the sealing ring is mounted on the earphone, an additional chamber is formed by the rear wall, the seal component and the adjusting component, and the additional component is isolated. As a result, the rear chamber may be double sealed, and thus bass volume may be further suppressed.
[0006] In some embodiments, the removable sealing component may be a ring including a flexible material.
[0007] In some embodiments, the adjust component and the rear wall may respectively include a first magnet and a second magnet, when the adjusting component is in the first position or the second position, the first magnet and the second magnet can pull the adjusting component and the rear wall toward each other.
[0008] In some embodiments, the adjusting component may occupy some space of the rear chamber when in the first position.
[0009] According to one embodiment, an earphone is provided. The earphone may include: a shell which defines an inner chamber; an acoustoelectric transducer disposed inside the inner chamber and dividing the inner chamber into a front chamber and a rear chamber; at least one through hole extending from the rear chamber to outside space; and an adjusting component which can be switched between a first position and a second position, where in the first position, the at least one through hole is sealed by the adjusting component, and in the second position, the rear chamber and outside space are in fluid communication through the at least one through hole, where the adjusting component is disposed in a rear part of the earphone when in the first position and the second position.
BRIEF DESCRIPTION OF THE DRAWINGS [0010] The foregoing and other features of the present disclosure will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. Understanding that these drawings depict only several embodiments in accordance with the disclosure and are, therefore, not to be considered limiting of its scope, the disclosure will be described with additional specificity and detail through use of the accompanying drawings.
[0011] FIG. 1 schematically illustrates a three-dimensional view of an earphone 100 according to one embodiment;
[0012] FIG. 2 schematically illustrates an assembly view of the earphone 100;
[0013] FIG. 3 schematically illustrates a three-dimensional view of a rear housing of the earphone 100;
[0014] FIG. 4 schematically illustrates a three-dimensional view of an adjusting component of the earphone 100;
[0015] FIG. 5 schematically illustrates bass volume of the earphone 100 in different bass modes; and
[0016] FIG. 6 schematically illustrates a three-dimensional view of an earphone 200 according to one embodiment.
DETAILED DESCRIPTION
[0017] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. The illustrative embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the Figures, can be arranged, substituted, combined, and designed in a wide variety of different configurations, all of which are explicitly contemplated and make part of this disclosure.
[0018] FIG. 1 schematically illustrates a three-dimensional view of an earphone 100 according to one embodiment. The earphone 100 is an in-ear type, while applications of other earphone kinds may be simply conceived based on following detail descriptions.
[0019] The earphone 100 may include a shell 110 which defines an inner chamber. At a front end of the shell 110, there may be provided with an ear cushion 130. The front end of the shell 110 may be put into an auditory meatus of a user, so the ear cushion 130 may ease the pressure between the shell 110 and the auditory meatus. An acoustoelectric transducer for converting electric signals into sound may be disposed inside of the shell 110, dividing the inner chamber into a front chamber closer to the front end and a rear chamber closer to a back end opposite to the front end.
[0020] Bass volume of the earphone 100 may be highly relevant to the acoustic compliance of the rear chamber. If the rear chamber has a low acoustic compliance value, the bass volume may be suppressed, vice versa. The acoustic compliance value of the rear chamber may be calculated based on Equation (1 ):
C=V/(Y*P) Equation (1 ), where C represents the acoustic compliance, V represents the volume of the rear chamber, P represents the pressure inside the rear chamber and γ is a constant. It could be concluded that, enlarging the rear chamber or reducing the inner pressure of the rear chamber can increase the bass volume, vice versa.
[0021] In some embodiments, at least one through hole may be formed on the shell 110. The at least one through hold may extend from the rear chamber to outside space, such that the rear chamber and outside space may be in fluid communication through the at least one through hole. An adjusting component 150 may be provided to open or seal the at least one though hole. When the at least one through hole is completely opened, the rear chamber and the outside space may be in fluid communication, thus the volume of the rear chamber may be taken as infinite and the inner pressure may equal to the atmospheric pressure. As a result, the acoustic compliance value of the rear chamber may be relatively large and the bass volume may be increased. When the at least one through hole is completely sealed, the volume of the rear chamber becomes a constant and the inner pressure of the rear chamber may increase along with membrane vibration of the acoustoelectric transducer. As a result, the acoustic compliance value of the rear chamber may be relatively small and the bass volume may be suppressed. Therefore, the bass volume of the earphone may become controllable by changing the position of the adjusting component 150. Specifically, when the adjusting component 150 is in a first position, the at least one through hole may be sealed, thus the bass volume may be reduced. When the adjusting component 150 is in a second position, the at least one through hole may be open, thus the bass volume may be increased.
[0022] For clearly illustrating the structure of the earphone 100, FIG. 2 schematically illustrates an assembly view of the earphone 100. The shell of the earphone 100 may include two parts, a front housing 111 and a rear housing 113. It should be noted that, in some embodiments, the front housing 111 and the rear housing 113 may be formed as an integral structure. A speaker 170 may be disposed inside of the shell, constituting the front chamber and the rear chamber with the front housing 111 and the rear housing 113, respectively. The ear cushion 130 may be mounted on a protruding pipe of the front housing 111 , which pipe may be called as a sound guiding pipe. The at least one through hole may be formed on a rear wall of the rear housing 113 which may be substantially opposite to the speaker 170. And the adjusting component 150 may fill up or free up the at least one through hole.
[0023] Hereunder, structures of the rear housing 113 and the adjusting component 150 may be illustrated in detail.
[0024] FIG. 3 schematically illustrates a three-dimensional view of the rear housing 113 of the earphone 100, and FIG. 4 schematically illustrates a three-dimensional view of the adjusting component 150 of the earphone 100. Referring to FIGs. 3 and 4, a set of through holes 1131 may be formed on the rear wall of the rear housing 113, while the adjusting component 150 may include a cover 1501 and a set of plugs 1503 formed on a first side of the cover 1501 . The number, size, shape and distribution of the through holes 1131 may be corresponding to those of the plugs 1503, such that the through holes 1131 may be completely blocked by the plugs 1503 when the adjusting component 150 is in the first position, i.e., when the plugs 1503 are put into the through holes 1131 . Therefore, the rear chamber may be sealed and the bass volume of the earphone 100 may be suppressed. When the adjusting component 150 is in the second position, i.e., when the plugs 1503 are out of the through holes 1131 , the rear chamber may be fluidly communicated with the outside space and thus the bass volume may be increased. Therefore, a bass-suppress or bass-enhance mode may be simply achieved by switching the adjusting component 150 between the first position and the second position.
[0025] In some embodiments, the length of the plugs 1503 may be larger than the depth of the through holes 1131 , so that the plugs 1503 may occupy some space of the rear chamber when put into the through holes 1131 . As a result, when the adjusting component 150 is in the first position, not only the rear chamber may be sealed, but also the volume of the rear chamber may be reduced, further suppressing the bass volume.
[0026] In some embodiments, the adjusting component 150 may include a first magnet 1505, and the rear wall of the rear housing 113 may include a second magnet 1133. When the first side of the adjusting component 150 is facing the rear wall of the rear housing 113, an attraction force may be generated between the two magnets 1505 and 1133, so that the first magnet 1505 and the second magnet 1133 can pull the adjusting component and the rear wall toward each other. Therefore, the adjusting component 150 can be attached on the rear wall of the rear housing 113 stably when the adjusting component 150 is in the first position. Besides, the attraction force may enhance the attachment between the first side of the cover 1501 and the rear wall of the rear housing 113, improving the sealing of the rear chamber. In some embodiments, the first magnet 1505 may be fixed in a recess on the first side of the cover 1501 , and the second magnet 1133 may be fixed in a recess on the rear wall of the rear housing 113.
[0027] Using magnetic force to achieve a movable conjunction between the rear housing 113 and the adjusting component 150 is merely an example. Other embodiments may be practical, as long as a user can conveniently switch the adjusting component 150 between the first and second positions and the adjusting component 150 can be attached on the rear housing 113 stably when the rear chamber is sealed. For example, a spring may be provided with one end connected with the first side of the cover 1501 and another end connected with the rear wall of the rear housing 113. The elasticity of the spring can hold the adjusting component 150 on the rear wall of the rear housing 113 when the adjusting component 150 is in the first position. To open the through holes 1133, the user may only need to pull the plugs 1503 out against the elasticity.
[0028] In some embodiments, a set of blind holes 1135 (marked with shadow in FIG. 3) may be formed on the rear wall of the rear housing 113. The blind holes 1135 may be used for accommodating the plugs 1503 when the plugs 1503 are pulled out from the through holes 1131 , i.e., when the adjusting component is in the second position. With the attraction force, the adjusting component 150 can also be attached to the rear wall of the rear housing 113 when the rear chamber is fluidly communicated with the outside space, thereby making the earphone 100 more compact. Similar to the through holes 1131 , the number, shape, size and distribution of the blind holes 1135 may be corresponding to those of the plugs 1501 . In some embodiments, the size of cross-sections of the blind holes 1135 may be slightly larger than that of the plugs 1501 , so that the blind holes 1135 can easily accommodate the plugs 1501 . Besides, the depth of the blind holes 1135 may be less than the length of the plugs 1501 . A space may be maintained between the rear wall of the rear housing 113 and the cover 1501 when the plugs 1501 are put into the blind holes 1135, thus the rear chamber can be fluidly communicated with the outside space. [0029] In some embodiments, the earphone 100 may further include a sealing component for reducing air leakage which may occur when the adjusting component 150 is in the first position, so as to enhance the sealing of the rear chamber and further suppress the bass. Referring back to FIG. 2, a ring 190 may be arranged between the rear wall of the rear housing 113 and the cover 1501 of the adjusting component 150. The ring 190 may include a flexible material, such as silicon or thermoplastic elastomer (TPE). When the adjusting component 150 is in the first position, the flexible ring 190 may contact with the rear wall of the rear housing 113 and the cover 1501 of the adjusting component 150, thus constituting an additional chamber which is isolated. As a result of the attraction force and the flexibility of the ring 190, a potential gap between the rear wall and the cover 1501 may be sealed. Therefore, the rear chamber may be double sealed and bass volume may be further suppressed.
[0030] In some embodiments, the ring 190 may be fixed, for example, either on the rear wall of the rear housing 113 or on the first side of the cover 1501 . In some embodiments, edges of the rear wall of the rear housing 113 and the cover 1501 may be softened, for instance, using a double injection process, and an enhanced sealing may also be achieved.
[0031] In some embodiments, the ring 190 may be movable. The ring 190 may be disposed on the rear wall of the rear housing 113 when the adjusting component 150 is in the first position, and may be move away from the rear wall of the rear housing 113 when the adjusting component 150 is in the second position. Accordingly, there may be at least three bass modes to be selected by the user. By putting the plugs 1503 into the blind holes 1135, the through holes 1131 are opened and the rear chamber is fluidly communicated with the outside space, thus a bass-enhance mode (Bass-mode I) may be obtained. By putting the plugs 1503 into the through holes 1131 , the through holes 1131 are closed and the rear chamber is sealed, thus a bass-suppress mode (Bass-mode II) may be obtained. By putting the plugs 1503 into the through holes 1131 and disposing the ring 190 between the rear wall of the rear housing 113 and the cover 1501 , the sealing of the rear chamber may be enhanced, thus a further bass-suppress mode (Bass-mode III) may be obtained.
[0032] FIG. 5 schematically illustrates bass volume of the earphone 100 in different bass modes. The horizontal axis stands for the sound frequency, and the vertical axis stands for the sound volume. It could be seen from FIG. 5 that, in three bass modes, sound volumes are distinct, especially in low frequency (bass) regions.
[0033] In the earphone 100, the through holes 1131 may be formed on the rear wall of the rear housing 113. Therefore, the adjusting component 150 can be attached on the rear wall of the rear housing 113 when it is in the first position and/or the second position. As a result, the adjusting component 150 may not occupy space around lateral surface of the shell 110. The lateral surface of the shell 110 may be between the front end and back end of the shell 110. When the earphone 100 is worn by a user, some region of the lateral surface may be contact with or very close to the ear of the user. However, the adjusting component 150 may not affect comfortable wearing of the earphone 100, as it may be disposed at least in the rear part of the earphone 100. Besides, the lateral surface may be crowded because some components, such as a pipe for guiding an earphone line, are normally designed on the lateral surface. However, the adjusting component 150 may not affect these components.
[0034] It should be noted that through holes may not be necessarily formed on the rear wall of the rear housing. In some embodiments, the adjusting component can still be disposed in the rear part of the earphone when in the first and second positions, even if the through holes are arranged at other positions of the earphone shell.
[0035] FIG. 6 schematically illustrates a three-dimensional view of an earphone 200 according to one embodiment. The earphone 200 may include a front housing 210 and a rear housing 230 together constituting an earphone shell. An acoustoelectric transducer may be disposed inside the shell, constituting a front chamber with the front housing 210 and a rear chamber with the rear housing 230. At least one through hole 231 may be formed on a lateral wall of the rear housing 230, through which the rear chamber can be fluidly communicated with the outside space. The rear housing 230 may be open at its back end, with a thread arranged on inner side of its lateral wall near the back end. An adjusting component may be provided to open or close the through hole 231 . The adjusting component may include a cover 251 and a screw 253 mounted on a side of the cover 251 . The screw 253 may be corresponding to the thread 233. A distance from the through hole 231 to the back end of the rear housing 230 may be less than a length of the screw 253. Therefore, when the screw 253 is screwed into the thread 233 to a first position, the through hole 231 may be blocked, thus the rear chamber may be sealed. When the screw 253 is screwed up to a second position, the through hole 231 may be opened, thus the rear chamber is fluidly communicated with the outside space. In some embodiments, a sealing component for reducing air leakage, such as a ring 270 may be provided. The ring 270 may be similar to the ring 190 of the earphone 100 in above description. Therefore, at least three bass modes may be achieved. Detail operations may be based on above descriptions. The adjusting component of the earphone 200 may not occupy space around lateral surface of the shell of the earphone 200. Further, the adjusting component may adjust the volume of the rear chamber by screwing the screw 253 into or out of the thread 233.
[0036] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Claims

We Claim:
1 . An earphone, comprising: a shell which defines an inner chamber; an acoustoelectric transducer disposed inside the inner chamber and dividing the inner chamber into a front chamber and a rear chamber; at least one through hole formed on a rear wall of the rear chamber, which rear wall is substantially opposite to the transducer; and an adjusting component which can be switched between a first position and a second position, where in the first position, the at least one through hole is sealed by the adjusting component, and in the second position, the rear chamber and outside space are in fluid communication through the at least one through hole.
2. The earphone according to claim 1 , further comprising at least one blind hole formed on the rear wall, and at least one plug extending from the adjusting component, where when the adjusting component is in the first position, the at least one plug is inserted into the at least one through hole such that the at least one through hole is sealed, and when the adjusting component is in the second position, the at least one plug is inserted into the at least one blind hole.
3. The earphone according to claim 1 , further comprising a removable sealing component, where when the adjusting component is in the first position and the sealing ring is mounted on the earphone, an additional chamber is formed by the rear wall, the seal component and the adjusting component, where the additional chamber is isolated.
4. The earphone according to claim 3, wherein the removable sealing component is a ring comprising a flexible material.
5. The earphone according to claim 1 , wherein a first magnet and a second magnet are respectively connected with the adjusting component and the rear wall, when the adjusting component is in the first position or the second position, an attraction force is produced between the first magnet and the second magnet.
The earphone according to claim 1 , wherein the adjusting component occupies some space of the rear chamber when in the first position.
An earphone, comprising: a shell which defines an inner chamber; an acoustoelectric transducer disposed inside the inner chamber and dividing the inner chamber into a front chamber and a rear chamber; at least one through hole extending from the rear chamber to outside space; and an adjusting component which can be switched between a first position and a second position, where in the first position, the at least one through hole is sealed by the adjusting component, and in the second position, the rear chamber and outside space are in fluid communication through the at least one through hole, where the adjusting component is disposed in a rear part of the earphone when in the first position and the second position.
PCT/CN2013/082805 2013-09-02 2013-09-02 Earphone WO2015027521A1 (en)

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