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WO2019064732A1 - Écouteurs - Google Patents

Écouteurs Download PDF

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Publication number
WO2019064732A1
WO2019064732A1 PCT/JP2018/023205 JP2018023205W WO2019064732A1 WO 2019064732 A1 WO2019064732 A1 WO 2019064732A1 JP 2018023205 W JP2018023205 W JP 2018023205W WO 2019064732 A1 WO2019064732 A1 WO 2019064732A1
Authority
WO
WIPO (PCT)
Prior art keywords
speaker
wall
earphone
vent
housing
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.)
Ceased
Application number
PCT/JP2018/023205
Other languages
English (en)
Japanese (ja)
Inventor
和之 小須田
雄史 松尾
勇一 小林
泰博 牧野
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.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management 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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to JP2019544257A priority Critical patent/JPWO2019064732A1/ja
Publication of WO2019064732A1 publication Critical patent/WO2019064732A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • 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

Definitions

  • the present disclosure relates to an earphone.
  • Patent Document 1 discloses an earphone in which a speaker is housed in a housing.
  • a vent is formed in the housing for reducing the pressure influence on the diaphragm of the speaker.
  • the size of the vent be small in order to stabilize the acoustic characteristics.
  • the vents become larger than a certain size.
  • the vent is covered with an acoustic resistor (vent resistor) made of mesh or foam.
  • the acoustic characteristics may change due to a failure of the acoustic resistor.
  • defects of the acoustic resistor include a point at which the acoustic resistor is peeled off, a point at which a hole of the acoustic resistor is closed by the adhesive, and a point at which the air permeability of the acoustic resistor changes due to compression.
  • An object of the present disclosure is to provide an earphone capable of reducing changes in acoustic characteristics.
  • An earphone is an earphone including a speaker and a housing for housing the speaker, wherein the housing is assembled to a first member covering the front of the speaker and a rear end of the first member.
  • the housing has a vent hole communicating the space in front of the speaker with the outside, and the vent hole is a part of an end of the first member on the second member side. It is formed by being surrounded by a part of the end by the side of the 1st member in the 2nd member.
  • the earphone according to the present disclosure can reduce changes in acoustic characteristics.
  • FIG. 1 is an external view showing the earphone according to the embodiment.
  • FIG. 2 is an exploded perspective view of the earphone according to the embodiment.
  • FIG. 3 is a cross-sectional view of the earphone as seen from the cross section including the III-III cut line in FIG.
  • FIG. 4 is a cross-sectional view of the earphone as seen from the cross section including the IV-IV cutting line in FIG.
  • FIG. 5 is a cross-sectional perspective view showing a schematic configuration of a port according to the embodiment.
  • FIG. 6 is an enlarged sectional view showing a part of FIG. 4 in an enlarged manner.
  • FIG. 7 is an enlarged sectional view showing a part of FIG. 4 in an enlarged manner.
  • FIG. 8 is an enlarged front view showing the vent according to the embodiment.
  • FIG. 9 is a cross-sectional perspective view of the earphone showing the vent according to the embodiment.
  • FIG. 10 is a frequency-sound pressure diagram showing sound pressure changes of the earphone according to the present embodiment and the earphones of Comparative Examples 1 and 2.
  • FIG. 11 is a frequency-THD diagram showing THD changes of the earphone according to the present embodiment and the earphones of Comparative Examples 1 and 2.
  • An earphone is an earphone including a speaker and a housing for housing the speaker, wherein the housing is assembled to a first member covering the front of the speaker and a rear end of the first member.
  • the housing has a vent hole communicating the space in front of the speaker with the outside, and the vent hole is a part of an end of the first member on the second member side. It is formed by being surrounded by a part of the end by the side of the 1st member in the 2nd member.
  • the ventilation hole is formed by being surrounded by the end by the side of the 2nd member in the 1st member, and the end by the side of the 1st member by the 2nd member. That is, the vent hole is formed by assembling the first member and the second member.
  • a vent for example, constraints imposed on each of the mold forming the first member and the mold forming the second member can be reduced.
  • the vent can be formed with high accuracy, and a vent with a smaller size can be formed with high precision. If the size of the vent can be reduced, changes in acoustic characteristics can be reduced. Therefore, the acoustic resistor can be omitted, and in this case, the number of parts can be reduced.
  • vent is located behind the front end of the frame provided to the speaker.
  • vent hole is located rearward of the front end of the frame provided in the speaker, air pushed out from the speaker is less likely to come out of the vent hole. Thereby, even if there is a vent, acoustic characteristics can be stabilized.
  • vent and the space communicate with each other through a recess provided on the inner surface of the first member.
  • the space in front of the speaker and the vent are in communication via the recess provided on the inner surface of the first member, the space in front of the speaker and the vent can be communicated with a simple configuration can do.
  • the recess is covered by the outer surface of the frame provided to the speaker.
  • the recess since the recess is covered by the outer surface of the frame of the speaker, the recess can be sealed by assembling the first member and the speaker. Thereby, even if it does not use another part, a crevice can be used as a channel which connects the space ahead of a speaker, and a vent.
  • Embodiment The earphone according to the embodiment will be described with reference to FIGS. 1 to 9.
  • FIG. 1 is an external view showing the earphone according to the embodiment.
  • FIG. 2 is an exploded perspective view of the earphone according to the embodiment.
  • FIG. 3 is a cross-sectional view of the earphone as seen from the cross section including the III-III cut line in FIG.
  • FIG. 4 is a cross-sectional view of the earphone as seen from the cross section including the IV-IV cutting line in FIG.
  • the earphone 100 includes a speaker 1, a housing 2, an ear tip 3 and a cable 4.
  • the earphone 100 is an inner-ear type headphone.
  • the speaker 1 includes a diaphragm 10, a frame 30, and a magnetic circuit 50, as shown in FIGS.
  • the speaker 1 further includes a stopper 20, a spacer 70, a substrate 80, and a dustproof net 90.
  • the direction in which the sound is emitted from the speaker 1 is referred to as the front, and the opposite direction is referred to as the back.
  • the diaphragm 10 has a shape in which the vicinity of the center when viewed from the front bulges to the front side relative to the outer peripheral edge.
  • the diaphragm 10 is provided with an outer peripheral ring 11 at the outer peripheral edge, and is supported by the frame 30 by fixing the outer peripheral ring 11 to the frame 30.
  • the frame 30 is a cylindrical member, and supports the diaphragm 10 at its front end.
  • the frame 30 accommodates the stopper 20 and the magnetic circuit 50 inside.
  • the outer peripheral surface of the rear end portion of the frame 30 is provided with a protrusion 31 projecting rearward.
  • the frame 30 is made of, for example, metal, resin or the like.
  • the substrate 80 and the dustproof net 90 are disposed at the end of the frame 30 opposite to the diaphragm 10 in the front-rear direction.
  • the magnetic circuit 50 is, for example, an internal magnet type magnetic circuit composed of a plate, a magnet and a yoke.
  • the magnetic circuit 50 may be an external magnet type magnetic circuit.
  • the magnetic circuit 50 has a through hole at its center.
  • the stopper 20 is a member for preventing the diaphragm 10 from coming too close to the magnetic circuit 50.
  • the stopper 20 protrudes toward the diaphragm 10 more than the magnetic circuit 50, and has a shape following the shape of the diaphragm 10.
  • the stopper 20 has a through hole at its center.
  • the stopper 20 is made of, for example, metal, resin or the like.
  • the voice coil 40 is a coiled member configured by winding a metallic wire in a ring shape (cylindrical shape) a plurality of times.
  • the voice coil 40 has an input terminal (not shown) to which an electrical signal is input.
  • the voice coil 40 is fixed to the diaphragm 10.
  • the voice coil 40 is disposed in the magnetic gap of the magnetic circuit 50.
  • the spacer 70 is a member for forming a sound tube by forming a space with the magnetic circuit 50 and the substrate 80. Specifically, the spacer 70 has a through hole at its center. Further, the spacer 70 is disposed between the magnetic circuit 50 and the substrate 80.
  • the substrate 80 has a circuit for electrically connecting the input terminal of the voice coil 40 and a terminal for acquiring an external electrical signal.
  • the circuit may convert an electrical signal acquired from the outside and output the converted electrical signal to the input terminal of the voice coil 40.
  • the substrate 80 is disposed on the side opposite to the side on which the magnetic circuit 50 of the spacer 70 is disposed.
  • the substrate 80 has a through hole at its center. A sound pipe is formed by the through holes of the substrate 80, the through holes of the spacer 70, the through holes of the magnetic circuit 50, and the through holes of the stopper 20 coaxially. There is.
  • the dustproof net 90 is a net that covers the through hole of the substrate 80.
  • the dustproof net 90 is disposed on the side of the substrate 80 opposite to the side on which the spacer 70 is disposed.
  • the housing 2 is a housing that accommodates the speaker 1.
  • a space for housing the speaker 1 is taken as an internal space H1.
  • the housing 2 includes a port 21, a box 23 and a back cover 25.
  • the port 21, the box 23, and the back cover 25 are formed of, for example, resin or metal.
  • FIG. 5 is a cross-sectional perspective view showing a schematic configuration of the port 21 according to the embodiment.
  • the port 21 is a member that holds the speaker 1 together with the box 23.
  • the port 21 is an example of a first member, and includes a main body portion 210 and an attachment portion 220.
  • the main body portion 210 is formed in a bottomed cylindrical shape whose rear end is opened. Specifically, the main body portion 210 includes a wall portion 211 and a bottom portion 214.
  • the wall portion 211 is formed in a cylindrical shape, and is a portion that blocks the internal space H1 from the outside.
  • the rear end portion of the wall portion 211 is thinner than the portion on the front side than the rear end portion.
  • the rear end portion of the wall portion 211 is a protrusion 212 which protrudes rearward from a portion on the front side of the rear end portion.
  • the projection 212 may be provided intermittently. Further, the projection 212 is provided with a notch 213 at a position corresponding to the projection 31 of the speaker 1.
  • a concave portion 216 elongated in the front-rear direction is formed at a position corresponding to the notch 213.
  • the rear end of the recess 216 is continuous with the notch 213.
  • the front end of the recess 216 is disposed at a position corresponding to the space in front of the speaker 1. As shown in FIG. 3, in the state in which the speaker 1 is assembled to the port 21, the recess 216 is covered by the outer surface of the frame 30 of the speaker 1.
  • FIG. 6 is an enlarged sectional view showing the inside of the rectangle R1 in FIG. 4 in an enlarged manner.
  • an abutting portion 218 that abuts the speaker 1 is provided at the front end portion inside the wall portion 211.
  • the contact portion 218 is a portion that protrudes inward from the front end portion of the wall portion 211.
  • the rear end surface of the contact portion 218 is flat.
  • the rear end surface of the contact portion 218 is in contact with the outer peripheral ring 11 of the speaker 1 from the front. Thereby, the rear end surface of the contact portion 218 is opposed to the front end portion of the frame 30 of the speaker 1 via the outer peripheral ring 11.
  • the contact portion 218 is provided over the inner peripheral surface of the wall portion 211 except for the portion corresponding to the notch 213 (see FIG. 3). Further, in a state where the speaker 1 is in contact with the contact portion 218, the tip end of the protrusion 212 is located rearward of the rear end portion of the frame 30.
  • a through hole 215 is formed at the center of the bottom portion 214 of the main body portion 210.
  • the through hole 215 is opposed to the through hole (the through hole of the substrate 80, the through hole of the spacer 70, the through hole of the magnetic circuit 50, and the through hole of the stopper 20) forming the sound tube of the speaker 1 through the diaphragm 10.
  • the mounting portion 220 is formed in a cylindrical shape so as to surround the through hole 215 of the bottom portion 214.
  • the attachment portion 220 protrudes from the main body portion 210 and is a portion to which the ear tip 3 is attached.
  • a protective net 91 covering the opening formed by the attachment portion 220 is attached to the tip of the attachment portion 220.
  • the box 23 is an example of a second member, and is a member that holds the speaker 1 together with the port 21.
  • the box 23 includes a base 231 and a cylindrical wall 232 surrounding the entire circumference of the base 231.
  • the base portion 231 is formed in a disc shape, and a through hole 233 is formed at the center thereof.
  • a protective net 92 covering the through hole 233 is attached to the front of the base 231. Further, in the vicinity of the through hole 233, a through hole 234 through which the cable 4 passes is formed.
  • the wall portion 232 is formed in a cylindrical shape, and is a portion that blocks the internal space H1 and the outside.
  • the port 21 is assembled to the front end portion of the wall portion 232, and the back cover 25 is assembled to the rear end portion.
  • FIG. 7 is an enlarged sectional view showing the inside of the rectangle R2 in FIG. 4 in an enlarged manner.
  • a first groove portion 235 is provided over the entire circumference of the wall portion 232.
  • the wall portion 232 is provided with an outer outer wall 236 and an inner inner wall 237 on the basis of the first groove portion 235.
  • the front outer wall 236 has a shape projecting forward relative to the front inner wall 237. That is, the amount of protrusion of the front outer wall 236 is larger than that of the front inner wall 237 based on the bottom surface of the first groove portion 235.
  • the protrusion 31 of the speaker 1 and the protrusion 212 of the port 21 are inserted.
  • the projection 212 and the projection 31 are sandwiched by the front outer wall 236 and the front inner wall 237 in the first groove portion 235.
  • a first gap S10 is provided between the tip of the protrusion 212 and the bottom surface of the first groove portion 235.
  • a gap S11 (see FIG. 3) is also provided between the tip end of the protrusion 31 and the bottom surface of the first groove portion 235.
  • the first gap S10 and the gap S11 are gaps in the front-rear direction, that is, in the height direction of the speaker 1.
  • An adhesive 60 is filled in the first gap S10 and the gap S11, and the protrusion 212 and the protrusion 31 are bonded to the first groove portion 235 by the adhesive 60.
  • a slight clearance is also provided between the projection 212 and the projection 31 and the front outer wall 236 and the front inner wall 237. Since the adhesive 60 penetrates into the clearance, the projections 212 and the projections 31 can be more firmly adhered to the first groove portion 235.
  • the projection 212 and the projection 31 may not be pressed into the first groove portion 235 at the time of assembly. That is, after assembly, no stress caused by the press-fit is generated.
  • This stress also contributes to the deformation of the housing 2.
  • the deformation of the housing 2 changes the acoustic characteristics of the speaker 1.
  • the stress itself does not occur, it is possible to suppress the change in the acoustic characteristic of the speaker 1.
  • the structure which press-fits the protrusion 212 and the protrusion 31 in the 1st groove part 235 may be used.
  • a second gap S20 is provided between the front outer wall 236 and a portion of the wall portion 211 which is more outward than the protrusion 212.
  • the second gap S20 is a gap in the front-rear direction, that is, the height direction of the speaker 1.
  • the second gap S20 allows the adhesive 60 protruding from the first groove portion 235 to be retained. As a result, the adhesive 60 can be prevented from protruding to the outer peripheral surface of the port 21 and the box 23.
  • the front inner wall 237 is a contact portion that contacts the speaker 1. Specifically, the front end surface of the front inner wall 237 is flat, and the front end surface is in contact with the frame 30 of the speaker 1 from the rear. Thus, the frame 30 of the speaker 1 is held in the front-rear direction by the front inner wall 237 as the contact portion and the contact portion 218 of the port 21.
  • a second groove 245 is provided at the rear end of the wall 232 along the entire circumference of the wall 232.
  • the wall portion 232 is provided with an outer rear outer wall 246 and an inner rear inner wall 247 with reference to the second groove portion 245.
  • the rear outer wall 246 has a shape projecting rearward than the rear inner wall 247. That is, the amount of protrusion of the rear outer wall 246 is larger than that of the rear inner wall 247 based on the bottom surface of the second groove portion 245.
  • the back cover 25 is attached to the second groove 245.
  • the back cover 25 is a member that covers the rear end of the box 23.
  • the back cover 25 is formed in a bottomed cylindrical shape whose front end is open.
  • the back cover 25 includes a wall portion 251 and a bottom portion 254.
  • the wall portion 251 is formed in a cylindrical shape, and is a portion that blocks the internal space H1 from the outside.
  • the front end of the wall 251 is inserted into the second groove 245 of the wall 232 in the box 23.
  • the front end portion of the wall portion 251 is sandwiched between the rear outer wall 246 and the rear inner wall 247 in the second groove portion 245.
  • a first gap S ⁇ b> 15 is provided between the front end of the wall 251 and the bottom of the second groove 245.
  • An adhesive 60 is filled in the first gap S15, and the front end portion of the wall portion 251 and the second groove portion 245 are adhered by the adhesive 60.
  • a slight clearance is also provided between the front end of the wall 251 and the rear outer wall 246 and the rear inner wall 247.
  • the front end of the wall 251 and the second groove 245 can be more firmly bonded.
  • the front end of the wall 251 may not be pressed into the second groove 245 at the time of assembly. That is, after assembly, no stress caused by the press-fit is generated. This stress also contributes to the deformation of the housing 2.
  • the deformation of the housing 2 changes the acoustic characteristics of the speaker 1. However, since the stress itself does not occur, it is possible to suppress the change in the acoustic characteristic of the speaker 1. If the generation of the stress is not taken into consideration, the front end of the wall 251 may be press-fit into the second groove 245.
  • the wall portion 251 is provided with a through hole 253 through which the cable 4 passes.
  • the through hole 253 penetrates the wall 251 in a direction intersecting in the front-rear direction.
  • the bottom portion 254 is formed with a groove 255 coaxially extending with the through hole 253. Since the cable 4 is disposed in the groove 255, the cable 4 can be stably held.
  • the housing 2 is provided with an air vent 95 communicating the space in front of the speaker 1 with the outside of the housing 2.
  • the vent hole 95 is provided at a part of the joint between the port 21 and the box 23.
  • FIG. 8 is an enlarged front view of the vent hole 95 according to the embodiment.
  • FIG. 9 is a cross-sectional perspective view of the earphone 100 showing the vent hole 95 according to the embodiment.
  • the vent hole 95 is formed by a first recess 96 provided at the rear end of the wall 211 and a second recess 97 provided at the front end of the front outer wall 236 in the wall 232. It is formed by being surrounded by and.
  • the first recess 96 forms a part of the notch 213.
  • the vent hole 95 is located rearward of the front end portion of the frame 30 provided in the speaker 1.
  • the recess 216 is covered by the outer surface of the frame 30. A region surrounded by the recess 216 and the outer surface of the frame 30 serves as a flow path communicating the space in front of the speaker 1 with the vent hole 95.
  • the space in front of the speaker 1 and the space outside the earphone 100 are in communication with each other through the air vent 95 and the flow path. Therefore, when the earphone 100 is inserted into the ear canal, the influence of pressure on the diaphragm 10 of the speaker 1 is alleviated.
  • vent holes 95 are circular. That is, each of the 1st recessed part 96 and the 2nd recessed part 97 is semicircle shape which becomes convex on the opposite side mutually.
  • the first recess 96 is open in the direction in which the mold is removed from the mold when the port 21 is manufactured.
  • the second recess 97 is open in the direction of die cutting when the box 23 is manufactured.
  • the vents are formed by cutting or the like after assembling the port having no first recess and the box having no second recess, it is preferable to have a diameter of 1 mm or less in terms of processing accuracy. It is difficult to form pores accurately.
  • the port 21 and the box 23 are formed with a metal mold
  • the size of the vent 95 can be reduced, the change in acoustic characteristics can be reduced.
  • the diameter of the air vent 95 is 0.3 mm or less. This makes it possible to reliably suppress the change in acoustic characteristics.
  • the diameter of the vent hole 95 is 0.2 mm or less, the change in acoustic characteristics can be further suppressed.
  • the ear tip 3 is a member connected to the attachment portion 220 of the port 21 for disposing the earphone 100 inside a person's ear canal.
  • the ear tip 3 is made of, for example, a resin.
  • the cable 4 is a member for inputting an electrical signal to the speaker 1. Specifically, the cable 4 is connected to the substrate 80 of the speaker 1 in a state of penetrating the through hole 253 of the back cover 25 and the through hole 234 of the box 23.
  • the sound output from the speaker 1 according to the electrical signal input through the cable 4 is output from the port 21 and the ear tip 3. For this reason, when the ear tip 3 is attached to a person's external ear canal, the person can hear the sound from the earphone 100.
  • the earphone according to the present embodiment is an earphone 100 including the speaker 1 and a housing 2 for housing the speaker 1, wherein the housing 2 is a first member (port 21) covering the front of the speaker 1; A ventilation hole 95 is formed in the housing 2 for communicating the space in front of the speaker 1 with the outside, and the second member (box 23) assembled to the rear end of the member. Is surrounded by a part of the end on the second member side of the first member (first recess 96) and a part of the end on the first member side of the second member (second recess 97) It is formed.
  • the vent hole 95 is formed by being surrounded by the first recess 96 provided in the port 21 and the second recess 97 provided in the box 23. That is, the vent hole 95 is formed by assembling the port 21 and the box 23. With such a vent hole 95, for example, constraints imposed on the mold forming the port 21 and the mold forming the box 23 can be reduced. As a result, the vent holes 95 can be formed with high accuracy, and the smaller sized vent holes 95 can be formed with high precision.
  • FIG. 10 is a frequency-sound pressure diagram showing sound pressure changes of the earphone 100 according to the present embodiment and the earphones of Comparative Examples 1 and 2.
  • FIG. 11 is a frequency-THD diagram showing THD changes of the earphone 100 according to the present embodiment and the earphones of Comparative Examples 1 and 2.
  • THD Total Harmonic Distortion
  • Comparative Example 1 is an earphone provided with a vent on the side surface of the port.
  • Comparative Example 2 is an earphone in which a vent is provided on the side of the port and the vent is covered with an acoustic resistor.
  • Comparative Example 2 is the earphone exemplified in the background art
  • Comparative Example 1 is one in which the acoustic resistor is removed from the earphone exemplified in the background art.
  • the diameter of the vent is 0.5 mm.
  • the acoustic resistor can be omitted, and in this case, the number of parts can be reduced.
  • vent holes 95 are located rearward of the front end of the frame 30 provided in the speaker 1.
  • vent hole 95 is positioned rearward of the front end of the frame 30, the air pushed out from the speaker 1 does not easily come out of the vent hole 95. Thereby, even if there are the vent holes 95, the acoustic characteristics can be stabilized.
  • vent hole 95 and the space in front of the speaker 1 communicate with each other through a recess 216 provided on the inner surface of the port 21.
  • the space in front of the speaker 1 and the vent hole 95 communicate with each other through the recess 216 provided on the inner surface of the port 21, the space in front of the speaker 1 and the vent hole 95 can be simplified. It can communicate by any of the configurations.
  • the recess 216 is covered by the outer surface of the frame 30 provided in the speaker 1.
  • the recess 216 since the recess 216 is covered by the outer surface of the frame 30 of the speaker 1, the recess 216 can be sealed by assembling the port 21 and the speaker 1. As a result, the recess 216 can be used as a flow path connecting the space in front of the speaker 1 and the vent hole 95 without using another part.
  • the groove (first groove 235) is provided to the wall 232 of the box 23, and the rear end (projection 212) of the wall of the port 21 is inserted into the groove.
  • a groove may be provided at the rear end of the wall of the port, and the front end of the wall of the box may be inserted into the groove. The same applies to the junction between the box and the back cover.
  • the circular vent hole 95 is illustrated, but the shape of the vent hole may be arbitrary.
  • Other shapes of the air vent 95 include, for example, a polygonal shape and an elliptical shape.
  • the shapes of the first concave portion and the second concave portion forming the vent hole are shaped so as to allow smooth removal from the mold at the time of manufacture.
  • vent hole 95 is located rearward of the front end portion of the frame 30 .
  • the vent may be located forward of the front end of the frame.
  • the embodiment can be realized by arbitrarily combining components and functions in the embodiment and each modification without departing from the scope obtained by applying various modifications that those skilled in the art would think to the embodiment, and the scope of the present disclosure.
  • the forms to be included are also included in the present disclosure.
  • the present disclosure is useful as an earphone with less change in acoustic characteristics.

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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

L'invention concerne des écouteurs (100) comprenant un haut-parleur (1) et un boîtier (2) qui reçoit le haut-parleur (1), le boîtier (2) comprenant un premier élément (21) qui recouvre l'avant du haut-parleur (1), et un second élément (23) assemblé à l'extrémité arrière du premier élément (21) ; un espace vers l'avant du haut-parleur (1) et un trou d'évent (95) qui communique avec l'extérieur sont formés dans le boîtier (2) ; et le trou d'évent (95) est formé en étant entouré d'une partie (première partie évidée (96)) sur la partie d'extrémité côté second élément (23) du premier élément (21), et d'une partie (seconde partie évidée (97)) sur la partie d'extrémité côté premier élément (21) du second élément (23).
PCT/JP2018/023205 2017-09-27 2018-06-19 Écouteurs Ceased WO2019064732A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019544257A JPWO2019064732A1 (ja) 2017-09-27 2018-06-19 イヤホン

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017186310 2017-09-27
JP2017-186310 2017-09-27

Publications (1)

Publication Number Publication Date
WO2019064732A1 true WO2019064732A1 (fr) 2019-04-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/023205 Ceased WO2019064732A1 (fr) 2017-09-27 2018-06-19 Écouteurs

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JP (1) JPWO2019064732A1 (fr)
WO (1) WO2019064732A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005191663A (ja) * 2003-12-24 2005-07-14 Foster Electric Co Ltd インサート型ヘッドホン
US20120321103A1 (en) * 2011-06-16 2012-12-20 Sony Ericsson Mobile Communications Ab In-ear headphone

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005191663A (ja) * 2003-12-24 2005-07-14 Foster Electric Co Ltd インサート型ヘッドホン
US20120321103A1 (en) * 2011-06-16 2012-12-20 Sony Ericsson Mobile Communications Ab In-ear headphone

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JPWO2019064732A1 (ja) 2020-09-10

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