WO2018225357A1

WO2018225357A1 - Acoustic device

Info

Publication number: WO2018225357A1
Application number: PCT/JP2018/013984
Authority: WO
Inventors: 大介佐川
Original assignee: 株式会社発明屋
Priority date: 2017-06-07
Filing date: 2018-03-30
Publication date: 2018-12-13
Also published as: JP6454934B1; WO2018225354A1; JP2019080338A; JP6500257B1; JPWO2018225354A1; CN110301139A; JPWO2018225357A1

Abstract

The present invention provides an acoustic device that has a good feel when worn in ears. This acoustic device comprises: an electroacoustic transducer; and a skin contact member. The electroacoustic transducer comprises a sound emission part. The electroacoustic transducer is disposed with the sound emission part facing the interior of an external auditory canal. The skin contact member covers the sound emission part of the electroacoustic transducer. The skin contact member transmits sound emitted from the sound emission part of the electroacoustic transducer. The skin contact member has flexibility, elasticity and air permeability. The skin contact member supports the electroacoustic transducer away from the inner wall of the external auditory canal by being fitted in the external auditory canal.

Description

Sound equipment

The present invention relates to an acoustic device that is used by being worn on an ear.

Many earphones have been commercialized as acoustic devices that are worn on the ear.
Earphones are roughly classified into inner-ear earphones (also called intra-concha earphones, open-air earphones, etc.) and canal-type (earplug type) earphones.

As shown in FIG. 34, the inner-ear type earphone 120 is obtained by fitting a housing 112 containing an electroacoustic transducer 111 into a hollow portion (concha conchaumum) 106 surrounded by an tragus 104 and an antitragus 105. use.

As shown in FIG. 35, the canal-type earphone 120 includes a housing 122 that houses an electroacoustic transducer 121, a sound conduit 123 that protrudes from the housing 122, and an earpiece 124 that is mounted around the sound conduit 123. ing. The canal type earphone 120 is used by inserting the earpiece 124 into the ear canal 101. In many canal-type earphones 120, the housing 122 fits into the concha cavity 106.

Earphones with a structure in which the hard housing comes into contact with the ears tend to hurt the part in contact with the housing when used for a long time. This problem is common to both the inner-ear earphone 120 and the canal-type earphone 120. Since the canal type earphone 120 seals the ear canal 101 with the earpiece 124, the feeling of wearing is not good.

The acoustic device according to an embodiment is an acoustic device that is used by being worn on an ear,
The acoustic device includes an electroacoustic transducer, and a skin contact member that covers a sound emitting portion of the electroacoustic transducer,
The electroacoustic transducer is arranged with the sound emitting part facing the inside of the ear canal,
The skin contact member is a member having flexibility, elasticity and breathability, and transmitting sound,
When the skin contact member fits into the ear canal, the electroacoustic transducer is supported away from the inner wall of the ear canal.

Side view of the acoustic device according to the first embodiment. Sectional drawing of the acoustic device shown in FIG. Front view of the acoustic device shown in FIG. Rear view of the acoustic device shown in FIG. Schematic sectional view showing a state in which the acoustic device shown in FIG. Side view of acoustic device according to second embodiment. Front view of the acoustic device shown in FIG. Rear view of the acoustic device shown in FIG. Schematic sectional view showing a state in which the acoustic device shown in FIG. Side view of acoustic device according to third embodiment Schematic sectional view showing a state in which the acoustic device shown in FIG. Side view of acoustic device according to fourth embodiment Sectional drawing of the acoustic device shown in FIG. Side view of the acoustic device shown in FIG. Front view of the acoustic device shown in FIG. Rear view of the acoustic device shown in FIG. FIG. 12 is a plan view of the acoustic device shown in FIG. The bottom view of the acoustic device shown in FIG. 12 is a schematic cross-sectional view showing a state where the acoustic device shown in FIG. The perspective view of the audio equipment concerning a 5th embodiment. Sectional view of the acoustic device shown in FIG. Sectional drawing of the acoustic unit with which the acoustic apparatus shown in FIG. Sectional drawing of the skin contact member with which the acoustic apparatus shown in FIG. Sectional drawing of the acoustic unit accommodating member with which the acoustic apparatus shown in FIG. The figure which illustrates the state which mounted | worn with the audio equipment shown in FIG. 20 is a schematic cross-sectional view showing a state where the acoustic device shown in FIG. Schematic sectional view showing a state in which an audio device according to the sixth embodiment is worn on the ear The perspective view of the audio equipment concerning a 7th embodiment. Sectional view of the acoustic device shown in FIG. The perspective view of another state of the acoustic device shown in FIG. The perspective view of the audio equipment which shows the modification of 7th Embodiment Side view of acoustic device according to eighth embodiment Partially broken view of the acoustic device shown in FIG. The side view which represented a part of remaining part which removed the skin contact member and interposition member of the audio equipment shown in FIG. 30 is a schematic cross-sectional view showing a state where the acoustic device shown in FIG. The figure which shows the state which attached the conventional inner ear type earphone to the ear The figure which shows the state which put on the ear the canal type earphone

[First Embodiment]
The acoustic device 1 shown in FIGS. 1 to 5 is an acoustic device that is used by being worn on the ear 100. This acoustic device (hereinafter referred to as an earphone) 1 can be used for both the right ear and the left ear.

The earphone 1 includes a driver unit 2 as an electroacoustic transducer, a cap 3 as a skin contact member, a core member 4, and a sound pickup device 5.

The driver unit 2 has a sound emission part 2a. By attaching the earphone 1 to the ear 100, the driver unit 2 is arranged with the sound emitting part 2 a facing the ear canal 101.

The cap 3 is a member that covers the sound emission part 2 a of the driver unit 2. The cap 3 is a substantially spherical member. The cap 3 is a member that fits in the ear canal 101 and isotropically transmits sound emitted from the sound emitting portion 2 a of the driver unit 2.

In this specification, “spherical” means spherical in the natural state. “Spherical shape” means a substantially spherical shape. The substantially spherical shape includes a shape in which most of the surface is a spherical surface and the remaining part is an aspherical surface or a spherical surface having a curvature different from that of the most spherical surface. “Spherical surface” means to include a spherical surface having minute holes and irregularities caused by the material. “Natural state” means a state in which no external pressure is applied (for example, an unused state, a non-wearing state, etc.) or a state in which sufficient time has passed since the external pressure was released.

The cap 3 supports the driver unit 2 away from the inner wall 103 of the ear canal 101, and arranges the sound emitting part 2a of the driver unit 2 near the entrance 102 in the ear canal 101.

The cap 3 is made of a sponge material. The sponge material used for the cap 3 has an open cell structure with high air permeability. A typical example is a highly foamed and highly breathable urethane foam. The cap 3 can function as an analog filter that removes annoying high-frequency sound.

The core member 4 is a cylindrical member. At one end of the core member 4, the driver unit 2 is accommodated and a cap 3 is attached.

At the other end of the core member 4, a sound pickup device 5 is accommodated and a cover 6 is attached.

The core member 4 is made of metal or synthetic resin. An example of the metal is an aluminum alloy. The cover 6 is a mesh member.

Inside the core member 4, a drive control circuit (not shown) for driving the driver unit 2 and a signal processing circuit (not shown) for processing an audio signal from the sound pickup element 5 are provided.

According to the earphone 1 of the first embodiment configured as described above, as shown in FIG. 5, the sound transmitting part 3 fits into the ear canal 101 so that the sound emitting part 2 a of the driver unit 2 is inside the ear canal 101. It is arrange | positioned in the vicinity of the entrance 102. Then, the sound emitted from the driver unit 2 isotropically passes through the cap 3 and is emitted into the ear canal 101. Since the sound conduit 123 and the earpiece 124 (see FIG. 35) do not exist, the reproduced sound emitted from the driver unit 2 at or near the entrance 102 in the ear canal 101 passes through the cap 3 and the skin of the ear canal 101 or its It is transmitted to the surrounding bone.

Therefore, according to the earphone 1 of the first embodiment, it is possible to recognize the sound emitted from the driver unit 2 as natural sound by making maximum use of the ability of the part around the ear canal 101 to feel the sound. .

Further, according to the earphone 1 of the first embodiment, since the sound emitting part 2a of the driver unit 2 is arranged near the entrance 102 in the ear canal 101, the sound emitted from the driver unit 2 can be efficiently guided to the ear canal 101. Can do. Therefore, although the small (small output) electroacoustic transducer 2 is used, the reproduced sound can be recognized as natural sound.

Also, since the earphone 1 of the first embodiment does not use the sound conduit 123 (see FIG. 35), the sound range transmitted from the driver unit 2 to the auditory organ is not limited. Therefore, the performance of the driver unit 2 can be fully exhibited.

In addition, the earphone 1 of the first embodiment has only the cap 3 in contact with the ear 100 and the cap 3 is made of a sponge material. 100 is less painful.

Further, in the earphone 1 of the first embodiment, since the cap 3 that fits into the ear canal 101 is made of a sponge material having air permeability, the ear canal 101 is not hermetically sealed. For this reason, touch noise hardly occurs.

In addition, since the earphone 1 of the first embodiment includes the sound pickup device 5, it is possible to realize a noise canceling function and a hearing aid function. The sound pickup device 5 can also be used as a binaural microphone.

Further, in the earphone 1 of the first embodiment, since the driver unit 2 and the sound pickup device 5 are accommodated in the core member 4, the driver unit 2 and the sound pickup device 5 can be protected. Further, the core member 4 can function as a portion that is picked up with a finger when the earphone 1 is attached to or detached from the ear 100.

[Second Embodiment]
In the following description, the same components as those in the embodiment already described are denoted by the same reference numerals and description thereof is omitted.

The earphone 1 shown in FIGS. 6 to 9 includes a baffle member 7 in addition to the configuration of the first embodiment. The baffle member 7 is an umbrella-shaped flange member. The baffle member 7 is a thin and flexible plate material. The baffle member 7 is made of an elastomer. A typical example of an elastomer is silicon.

According to the earphone 1 of the second embodiment, as shown in FIG. 9, by attaching the earphone 1 to the ear 100, the entrance 102 and its peripheral portion of the ear canal 101 are covered with the baffle member 7. Even in the state where the baffle member 7 is provided, the flow of air to the ear canal 101 is allowed. That is, the baffle member 7 does not hermetically seal the ear canal 101. A gap may be formed between the baffle member 7 and the ear skin.

Therefore, in addition to the effects of the first embodiment, the earphone 1 of the second embodiment can suppress sound leakage from the driver unit 2 into the ear canal 101 to the outside of the ear canal 101. And a bass component can be efficiently transmitted to an inner ear part.

Further, when the baffle member 7 comes into contact with the peripheral portion of the entrance 102 of the ear canal 101, the position of the driver unit 2 with respect to the ear canal 101 can be stabilized.

In addition, since the portions that come into contact with the ear 100 are the cap 3 and the baffle member 7 and both are soft members, the feeling of wearing on the ear 100 is good, and even when worn for a long time, the ear 100 is hardly painful.

[Third Embodiment]
The earphone 1 shown in FIGS. 10 and 11 includes a sub baffle member 8 in addition to the configuration of the second embodiment.

The sub baffle member 8 is provided between the baffle member 7 and the cap 3. The sub baffle member 8 is provided around the core member 4. The sub baffle member 8 is a thin and flexible plate material. The sub baffle member 8 is formed of an elastomer.

According to the earphone 1 of the third embodiment, as shown in FIG. 11, by attaching the earphone 1 to the ear 100, the entrance 102 and its peripheral portion of the ear canal 101 are covered with the baffle member 7 and the baffle member 7. The space between the cap 3 and the cap 3 is partitioned by the sub baffle member 8. Even in the state where the sub-baffle member 8 is provided, the flow of air to the ear canal 101 is allowed. That is, the sub baffle member 8 does not hermetically seal the ear canal 101. A gap may be formed between the baffle member 8 and the ear skin.

Therefore, the earphone 1 of the third embodiment can further suppress sound leakage compared to the second embodiment. And a bass component can be transmitted to an inner ear part more efficiently.

Also, the position of the driver unit 2 relative to the ear canal 101 can be further stabilized by the sub baffle member 8 coming into contact with the inner wall 103 of the ear canal 101.

Further, the portions that come into contact with the ear 100 are the cap 3, the baffle member 7, and the sub baffle member 8, and these are all soft members. It is hard to cause pain.

[Fourth Embodiment]
The earphone 1 shown in FIGS. 12 to 19 includes a fitting member 9 in addition to the configuration of the second embodiment.

The fitting member 9 is provided around the core member 4. The fitting member 9 is a member having flexibility and elasticity that fits into the concha cavity 106. Even in a state in which the fitting member 9 is fitted in the concha cavity 106, air circulation to the ear canal 101 is allowed. A gap is partially formed between the fitting member 9 and the ear skin. If the fitting member 9 has air permeability, a gap between the ear skin and the fitting member 9 is unnecessary.

The fitting member 9 is formed of a sponge material, a nonwoven fabric material, or a fiber material in which fibers are entangled with each other. The sponge material used for the fitting member 9 includes silicon sponge. Silicone sponges include those that are transparent and have a smooth surface. By using this type of silicon sponge, it is possible to realize a novel fitting member 9 that is transparent and has a smooth surface. Some silicon sponges have closed cells and do not allow moisture and air to permeate. By using this type of silicone sponge, it is possible to realize the fitting member 9 that is very soft and feels warm when worn on the ear 100.

The fitting member 9 has a circular shape when viewed from the front (see FIG. 15), and a substantially elliptical shape with the right side slightly crushed when viewed from the top (see FIG. 17). The position of the core member 4 with respect to the fitting member 9 is eccentric to the right when viewed from the front (see FIG. 15).

The baffle member 7 is provided between the fitting member 9 and the cap 3.

As shown in FIG. 11, the earphone 1 of the fourth embodiment is stably attached to the ear 100 by fitting the cap 3 into the ear canal 101 and fitting the fitting member 9 into the concha cavity 106. .

In the earphone 1, since the flexible and elastic fitting member 9 fits into the concha cavity 106, the earphone 1 has a better fit to the ear 100 than the earphone having a structure in which the hard housing contacts the ear 100. Even if I wear it for a long time, my ear does not hurt.

The earphone 1 can be used for both the right ear and the left ear by rotating the fitting member 9 and the core member 4 relatively 180 °.

[Fifth Embodiment]
The earphone 10 shown in FIGS. 20 to 24 includes an acoustic unit 11 and an ear mounting body 19.
The acoustic unit 11 includes a driver unit 12 as an electroacoustic transducer, a wireless module 13, and a housing 18.
The driver unit 12 has a sound emitting unit 12a. The driver unit 12 is arranged with the sound emitting part 12a facing the ear canal 101.

The wireless module 13 includes a reception unit 14, a battery 15, an operation unit 16, and a control unit 17.
The receiving unit 14 receives a signal wirelessly transmitted from a transmitter (an audio content providing device such as an audio player or a smartphone) (not shown). As a communication protocol between the receiver 14 and a transmitter (not shown), Wi-Fi (registered trademark), Bluetooth (registered trademark), or another protocol can be used.

The signal line 12 b extending from the terminal of the driver unit 12 is connected to the output terminal of the receiving unit 14. The receiving unit 14 converts the received signal into an electric signal (electroacoustic transducer drive signal). The receiving unit 14 inputs the converted electric signal to the driver unit 12 through the signal line 12b. The driver unit 12 converts the input electric signal into sound and emits sound from the sound emitting unit 12a.

The battery 15 supplies power to the driver unit 12 and the control unit 17. The battery 15 is a primary battery or a secondary battery.

The operation unit 16 includes an on / off button 16a, an increase button 16b, and a decrease button 16c. The on / off button 16 a is an operator for turning on / off the supply of power from the battery 15. The increase button 16b is an operator for increasing the output of an electric signal by the receiving unit 14. The decrease button 16c is an operator for decreasing the output of the electric signal by the receiving unit 14.

The control unit 17 turns on / off the supply of power from the battery 15 and increases / decreases the output of the electric signal by the receiving unit 14 according to an operation performed on the operation unit 16.

The housing 18 is a hard member made of resin. The housing 18 is a cylindrical member. On the one end 18a side of the housing 18 (the side facing the ear canal 101 when the earphone 10 is attached to the ear canal 101), a portion of the driver unit 12 opposite to the sound emitting portion 12a is fitted and fixed. On the other end 18 b side of the housing 18, the control unit 17 is accommodated and fixed. A through hole 18c is formed in a part of the housing 18 on the other end 18b side so as to penetrate the peripheral wall. An on / off button 16A, an increase button 16b, and a decrease button 16c protrude through the through hole 18c and out of the housing 18.

The ear mounting body 19 is a member that wraps the entire acoustic unit 11. The ear wearing body 19 is a member having stretchability, flexibility and breathability. The ear wearing body 19 includes a skin contact member 19A and an acoustic unit housing member 19B. Both the skin contact member 19A and the acoustic unit housing member 19B are made of a sponge material. As the sponge material, a sponge material similar to the sponge material used for the cosmetic puff is used. As the sponge material, the same material as the sponge material used for the cosmetic puff may be used. The specific gravity of the skin contact member 19A is smaller than the specific gravity of the acoustic unit housing member 19B. The skin contact member 19A is softer than the acoustic unit housing member 19B. The skin contact member 19A has a property of transmitting sound better than the acoustic unit housing member 19B.

The skin contact member 19 A is a member that covers the sound emission part 12 a of the driver unit 12. The sound transmission member 19 A is a member that isotropically transmits the sound emitted from the sound emitting unit 12 a of the driver unit 12.

The acoustic unit housing member 19 B is a member that houses most of the acoustic unit 11. In the acoustic unit housing member 19B, a cavity 19c for housing the acoustic unit 11 is formed. Most of the acoustic unit 11 is accommodated in the cavity 19c. A part of the driver unit 12 on the sound emission part 12a side protrudes from one end 19Ba of the acoustic unit housing member 19B (see FIG. 22C). An annular recess 19Bb is formed on the outer side of the end on the one end 19Ba side of the acoustic unit housing member 19B.

A part of the cavity 19c is an operation unit accommodation area 19d for accommodating the on / off button 16a, the increase button 16b, and the decrease button 16c. Due to the presence of the operation unit accommodation region 19d, the thickness of the specific portion 19Bc of the acoustic unit accommodation member 19B is thinner than other portions (see FIG. 22C). Since the specific portion 19Bc is thinner than the other portions, the specific portion 19Bc is softer than the other portions and easily deforms when pressed with a finger. The specific portion 19Bc is more easily deformed than the other portions, thereby making it easier to operate the on / off button 16a, the increase button 16b, and the decrease button 16c.

The skin contact member 19A is formed with a cavity 19Ac for accommodating one end 19Ba end of the acoustic unit accommodating member 19B and a part of the driver unit 12. The cavity 19Ac opens to the opposite side to the surface 19Aa on the side facing the ear canal 101 when the earphone 10 is attached to the ear canal 101. On the inner side of the skin contact member 19A, an annular convex portion 19Ab that fits with the concave portion 19Bb of the acoustic unit housing member 19B is formed.

The earphone 10 is placed in contact with the skin after the acoustic unit 11 is fitted into the cavity 19c of the acoustic unit housing member 19B so that the on / off button 16A, the increase button 16b, and the decrease button 16c are arranged in the operation unit housing area 19d. The member 19A is assembled by covering the end 19Ba side of the acoustic unit housing member 19B. When the convex portion 19Ab of the skin contact member 19A and the concave portion 19Bb of the acoustic unit housing member 19B are fitted to each other, the sound transmitting member 19A and the acoustic unit housing member 19B are simply connected to each other. If an adhesive layer is provided between the skin contact member 19A and the acoustic unit housing member 19B, they are fixed to each other.

The earphone 10 configured as described above is stably attached to the ear 100 by fitting the ear attachment body 19 into the concha cavity 106. Then, when the skin contact member 19 A of the ear mounting body 19 is fitted into the concha cavity 106, the driver unit 12 faces and is supported by the ear canal 101. The sound emitted from the driver unit 12 passes through the skin contact member 19A and is emitted into the ear canal 101. Since the sound conduit 123 (see FIG. 35) does not exist, the sound range transmitted from the driver unit 12 to the auditory organ is not limited. Therefore, the performance of the driver unit 12 can be sufficiently exhibited.

Moreover, since the ear mounting body 19 is a member having air permeability, the earphone 10 does not airtightly block the external ear canal 101. Therefore, the earphone 10 is less likely to generate touch noise.

Further, since the entire acoustic unit 11 of the earphone 10 is encased in the ear mounting body 19, only the ear mounting body 19 is in contact with the ear 100. The ear mounting body 19 is a member having elasticity and flexibility. For this reason, the earphone 10 has a better fit to the ear 100 than an earphone having a structure in which a hard housing is in contact with the ear 100, and the ear 100 is less likely to be painful even if worn for a long time.

Further, the earphone 10 can be used for both the right ear and the left ear.

Also, the earphone 10 can take out the ear mounting body 19 from the acoustic unit 11 and replace it with another ear mounting body 19. Therefore, by replacing the ear mounting body 19 that has become dirty as a result of use with a new ear mounting body 19, the earphone 10 can be made as clean as a new one. In addition, by preparing a plurality of types of ear mounting bodies 19 having different designs, it is possible to selectively use a plurality of types of ear mounting bodies 19 having different designs according to clothes. In addition, by preparing a plurality of types of ear mounting bodies 19 having different performance / functions, it is possible to selectively use a plurality of types of ear mounting bodies 19 having a plurality of types of performance / functions according to applications. Examples of performance and functionality include: wearing performance suitable for everyday life (standard flexibility), wearing performance suitable for sleeping (more flexible), and wearing suitable for exercise. Performance (with a fall prevention function), etc. can be mentioned. As an example of the fall prevention function, a string, a chain, and the like that connect the both ear mounting bodies 19 mounted on the left and right ears 100 to each other can be exemplified.

Moreover, since the material of the ear mounting body 19 is similar to the makeup puff, the earphone 10 can be used as a makeup puff.

[Sixth Embodiment]
The earphone 10 shown in FIG. 25 has an ear canal fitting part 19e. Other configurations are the same as those of the earphone 10 of the fifth embodiment. The ear canal fitting portion 19e forms a part of the skin contact member 19A. The ear canal fitting portion 19 e is a portion that fits into the ear canal 101 when the earphone 10 is worn.

In the earphone 10 of the sixth embodiment, the ear canal fitting portion 19e of the skin contact member 19A fits into the ear canal 101, and the portion other than the ear canal fitting portion 19e of the skin contact member 19A fits into the concha cavity 106. Therefore, the earphone 10 of the sixth embodiment is worn on the ear 100 more stably than the earphone 10 of the fifth embodiment.

[Seventh Embodiment]
The earphone 10 shown in FIGS. 26 to 28 includes a first cable 40A. The first cable 40A is a part of the cable 40 that electrically connects an audio content providing device (not shown) and the acoustic unit 11 to each other. The acoustic unit 11 of the earphone 10 includes only a driver unit 12. The cavity 19c is formed smaller than that of FIG. In the cavity 19c, there is no operation portion accommodation area 19d (see FIG. 21). Other configurations are the same as those of the earphone 10 of the fifth embodiment. An electrical signal from an audio content providing apparatus (not shown) is input to the driver unit 12 via the cable 40. The driver unit 12 converts the input electric signal into sound and emits sound from the sound emitting unit 12a.

As shown in FIG. 27, one end 40a of the first cable 40A is connected to a terminal of the driver unit 12. The other end side of the first cable 40A extends outside the ear mounting body 19 through the inside of the acoustic unit housing member 19B. As shown in FIG. 26, the cable 40 includes a first cable 40A and a second cable 40B. One end of the second cable 40B is connected to a receiving device (not shown). A receiving device (not shown) receives a signal wirelessly transmitted from a transmitting device (audio content providing device) (not shown). The received signal is processed and input to the driver unit 12 through the cable 40. As a communication protocol between a receiving device (not shown) and a transmitter (not shown), Wi-Fi (registered trademark), Bluetooth (registered trademark), or another protocol can be used.

The first cable 40A and the second cable 40B are electrically connected to each other via the connection terminal pair 41. The connection terminal pair 41 includes a first terminal 41A and a second terminal 41B. The first terminal 41A is a male terminal, and the second terminal 41B is a female terminal. The first terminal 41A is attached to the other end 40Aa of the first cable 40A. The second terminal 41B is attached to the other end 40Ba of the second cable 40B. The first terminal 41A and the second terminal 41B can be connected to and disconnected from each other. The length of the first cable 40A is arbitrary. The length of the first cable 40A (the length from the acoustic unit 11 to the first terminal 41A) is preferably 20 cm or less. This is because, considering that the first cable 40A and the second cable 40B are connected to each other and used, it is sufficient that the length of the first cable 40A is at most 20 cm.

The earphone 10 of the seventh embodiment is a product in a state where the first terminal 41A and the second terminal 41B are uncoupled from each other as shown in FIG. That is, the earphone 10 is provided as a product that does not include the second cable 40B and a transmission device (not shown). However, it is possible to sell the earphone 10 as a set with the second cable 40B and a transmitting device (not shown).

According to the seventh embodiment, when the earphone 10 breaks down, it is possible to replace only the earphone 10 with a new one. Also, by preparing a plurality of types of earphones 10 having different acoustic characteristics, the earphones 10 having acoustic characteristics corresponding to the application can be used by being connected to the second cable 40B.

[Eighth Embodiment]
The earphone 12 shown in FIGS. 30 to 33 includes an earphone casing 50 as a second enclosure, a driver unit 60 as an electroacoustic transducer, a cap 70 as a skin contact member, a baffle tube 80 as an interposition member, Have

The earphone casing 50 is an integrally formed product formed by drawing an aluminum plate. The earphone casing 50 has a head portion 51 and a body portion 52.

The head portion 51 has a hemispherical shell structure. The body portion 52 has a structure in which both ends of a straight pipe are closed with hemispherical shells. The head portion 51 and the body portion 52 are connected coaxially via a neck portion (narrow portion) 53. The outer diameter of the head part 51 is larger than the outer diameter of the body part 52.

The tip part (left end part in the figure) of the head part 51 is open. A protector 54 is attached to the tip 51 a of the head portion 51. The protector 54 is a hemispherical shell-like member that is substantially symmetrical with the head portion 51. The protector 54 and the head portion 51 are combined to form a spherical shell. The protector 54 is a mesh-like metal member. The protector 54 transmits sound well. An annular protrusion 51 b into which the driver unit 60 is fitted is provided on the inner side of the front end portion of the head portion 41.

The driver unit 60 has an electroacoustic transducer 61 and a driver casing 62 as a first enclosure. A diaphragm 61a as a sound emitting unit is provided at the tip (left end in the drawing) of the electroacoustic transducer 61. An electromechanical coupling system 63 that converts an input electric signal into vibration of the diaphragm 61a is provided behind the diaphragm 61a (right side in the figure). The electromechanical coupling system 63 includes a voice coil, a magnet, and the like (all not shown). The vibration of the diaphragm 61a is released as air vibration, that is, sound. A pair of terminals 61 b are provided at the base end (right end in the figure) of the electroacoustic transducer 61. The electroacoustic transducer 61 is accommodated in the driver casing 62. The driver casing 62 forms a first resonance chamber 91 with the electroacoustic transducer 61.

The driver casing 62 includes a cylindrical portion 62a and an end plate portion 62b. The cylindrical portion 62a surrounds the electroacoustic transducer 61. The diaphragm 61a of the electroacoustic transducer 61 is exposed from the front end of the cylindrical portion 62a. The drive shaft of the electromechanical coupling system (not shown) is arranged coaxially with the central axis of the cylindrical portion 62a. The rear end of the cylindrical portion 62a is closed with an end plate portion 62b. A pair of terminals 62c are provided on the inner surface (the left surface in the figure) of the end plate portion 62b. A pair of terminals 62d are provided on the outer surface (the right surface in the drawing) of the end plate portion 62b. The terminal 62c on the inner surface of the end plate 62b and the terminal 62d on the outer surface are electrically connected through a through hole (not shown). The terminal 61b of the electroacoustic transducer 61 is electrically connected to the terminal 62c on the inner surface of the end plate portion 62b. The end plate 62b is provided with a port (vent hole) 62e.
The port 62e opens to the inner surface and the outer surface of the end plate portion 62b.

The driver casing 62 is stably held in the head portion 51 by fitting the cylindrical portion 62 a to the annular protrusion 51 b of the head portion 51. In this example, the rear end (right end in the figure) of the driver casing 62 is in contact with the inner wall of the head portion 51 over the entire circumference. Thereby, the second resonance chamber 92 is formed between the head portion 51 and the end plate portion 62b. The second resonance chamber 92 communicates with the first resonance chamber 91 via the port 62e.

In this example, the internal space of the body portion 52 forms the third resonance chamber 93. The third resonance chamber 93 communicates with the second resonance chamber 92 via the internal space 94 of the neck portion 53. That is, the communication part (internal space 94) between the second resonance chamber 92 and the third resonance chamber 93 is constricted.

The cable insertion hole (not shown) is provided in the lower part of the center of the body part 52 in the axial direction (left-right direction in the figure). A bushing 55 is attached to the body portion 52 coaxially with a cable insertion hole (not shown). One end of the cable 56 is inserted into the body portion 52, that is, the third resonance chamber 93 through a bushing 55. In the third resonance chamber 93, one end portion of the cable 56 is fixed to the body portion 52, and two lead wires 57 are drawn out from the one end portion. Each lead wire 57 is electrically connected to the terminal 63. The other end of the cable 56 is provided with a plug (not shown) and is connected to a music playback device or the like.

The body portion 52 can function as a portion that is picked up with a finger when the earphone 12 is attached to or detached from the ear 100.

The cap 70 is a substantially spherical member. The cap 70 is made of a sponge material. The sponge material used for the cap 70 has an open cell structure with high air permeability. A typical example is a highly foamed and highly breathable urethane foam. The cap 70 has flexibility, elasticity, and breathability. The cap 70 is a member that transmits sound. The cap 70 can function as an analog filter that removes annoying high-frequency component sounds.

The cap 70 covers the head portion 51 in a state where the baffle tube 80 and the protector 54 are attached. By combining the cap 70 and the baffle tube 80, a substantially spherical body is formed except for the end on the body 52 side (the right side in the figure). The diaphragm 61 a and the side part 61 c of the electroacoustic transducer 61 are covered with a cap 70. The cap 70 supports the electroacoustic transducer 61 away from the inner wall 103 (FIG. 33) of the ear canal 101. In this example, a driver casing 62, a protector 54, a head portion 51, and a baffle tube 80 are interposed between the electroacoustic transducer 61 and the cap 70.

The baffle tube 80 is wrapped around the earphone casing 50. That is, in this example, the baffle tube 80 is indirectly attached to the driver unit 60. The baffle tube 80 exists between the driver unit 60 and the cap 70.

The baffle tube 80 extends from an end portion of the body portion 52 on the head portion 51 side to an intermediate portion of the protector 54. The end portion 80 a on the body portion 52 side of the baffle tube 80 is not covered with the cap 70. The surface of the end portion 80a is a partial spherical surface having the same curvature as the surface of the cap 70 in the natural state.

The tip part (the left end part in the figure) 80b of the baffle tube 80 is open. A narrow annular gap is formed between the tip 80 b of the baffle tube 80 and the protector 54. The end 80a on the body part 52 side of the baffle tube 80 is in airtight contact with the body part 52 over the entire circumference. The end portion 80a is provided with an annular return portion 81 facing inward. The return portion 81 is in surface contact with the hemispherical shell of the body portion 52, so that the airtightness between the baffle tube 80 and the body portion 52 is maintained. The return part 81 reaches the neck part 53.

The baffle tube 80 forms an annular air chamber 95 between the earphone casing 50 and the baffle tube 80. In this example, an air chamber 95 is formed between the head portion 51 and the baffle tube 80. That is, the air chamber 95 surrounds the driver unit 60.

The baffle tube 80 is much softer than the earphone casing 50 and the driver casing 62. The baffle tube 80 has the same flexibility as the cap 70. The baffle tube 80 is easily deformed when an external force is applied. The baffle tube 80 is restored to its natural state when no external force is applied. The shape of the baffle tube 80 shown in FIG. 31 is a natural state shape.

The baffle tube 80 has elasticity. The baffle tube 80 is made of an elastomer. An example of an elastomer is silicone rubber. A relatively large frictional force acts between the baffle tube 80 made of an elastomer and the cap 70 made of a sponge material (foamed urethane foam, foamed silicone, etc.). The frictional force makes it difficult for the driver unit 60 and the cap 70 to move relative to each other. As a result, the displacement of the cap 70 with respect to the driver unit 60 and the inadvertent or undesired removal of the cap 70 from the earphone casing 50 are prevented.

As shown in FIG. 33, the earphone 12 of the eighth embodiment configured as described above has a cap 70 between the baffle tube 80 and the inner wall 103 of the ear canal 101 by fitting the cap 70 into the ear canal 101. Intervenes. Although not shown in FIG. 33, the baffle tube 80 is compressed from the outside together with the cap 70 when attached to the ear 100. The driver unit 60 is supported away from the inner wall 103 of the ear canal 101. The electroacoustic transducer 61 is arranged with the diaphragm 61 a facing the ear canal 101. The diaphragm 61 a of the electroacoustic transducer 61 is disposed near the entrance 102 in the ear canal 101. Then, the sound emitted from the electroacoustic transducer 61 passes through the cap 70 radially and is emitted into the ear canal 101. Since the sound conduit 953 and the earpiece 124 (see FIG. 35) are not present, the reproduced sound emitted from the electroacoustic transducer 61 near the entrance 102 in the ear canal 101 passes through the cap 70 and the skin of the ear canal 101 or its It is transmitted to the surrounding bone.

Therefore, according to the earphone 12 of the eighth embodiment, it is possible to recognize the sound emitted from the driver unit 60 as natural sound by making the best use of the ability of the part around the ear canal 101 to feel the sound. .

Further, according to the earphone 12 of the eighth embodiment, since the diaphragm 61a as the sound emitting part of the electroacoustic transducer 61 is disposed near the entrance 102 in the ear canal 101, the sound emitted from the electroacoustic transducer 61 Can be efficiently guided to the ear canal 101. Therefore, although the small (small output) driver unit 60 is used, the reproduced sound can be recognized as natural sound.

Also, since the earphone 12 of the eighth embodiment does not use the sound conduit 123 (see FIG. 35), the sound range transmitted from the driver unit 60 to the auditory organ is not limited. Therefore, the performance of the driver unit 60 can be fully exhibited.

Moreover, since the outer shape of the cap 70 is a spherical shape, the earphone 12 of the eighth embodiment is easily fitted to the ear canal 101 of many people. Further, since the outer shape of the cap 70 is spherical, the sound emitted from the driver unit 60 is emitted radially into the ear canal 101 without being biased. Even if the mounting angle with respect to the ear changes slightly, the cap 70 is interposed between the baffle tube 80 and the inner wall 103 of the ear canal 101 so that the driver unit 60 is supported away from the inner wall 103 of the ear canal 101.

In addition, the earphone 12 of the eighth embodiment has only the cap 70 in contact with the ear 100 and the cap 70 is made of a flexible sponge material, so that the earphone 12 has a good wearing feeling on the ear 100 and is worn for a long time. Is less likely to cause pain in the ear 100.

Further, in the earphone 12 of the eighth embodiment, since the cap 70 fitted to the ear canal 101 is made of a sponge material having air permeability, the ear canal 101 is not hermetically sealed. For this reason, touch noise hardly occurs.

Moreover, since the baffle tube 80 exists between the head unit 51 and the cap 70, the earphone 12 of the eighth embodiment has good mid-low sound reproducibility even though the ear canal 101 is not hermetically sealed. This is because sound leakage outside the ear canal 101 is suppressed. Moreover, since the internal space of the baffle tube 80 forms the air chamber 95, the mid-low sound reproducibility is further improved. The baffle tube 80 can function as an acoustic amplifier in the mid-low range by causing the air in the air chamber 95 to resonate with the sound emitted from the driver unit 60.

In the earphone 12 of the eighth embodiment, the flexible baffle tube 80 vibrates in accordance with the vibration of the air in the air chamber 95, so that the vibration of the air in the air chamber 95 passes through the cap 70 and the inner wall of the ear canal 101. 111 is slightly transmitted. For this reason, it is possible to perceive the vibration of the sound emitted from the driver unit 60 through the skin of the ear canal 101.

Further, the earphone 12 of the eighth embodiment has a narrow annular gap formed between the tip 80b of the baffle tube 80 and the protector 54, so that it is emitted from the diaphragm 61a of the electroacoustic transducer 61 and rearward. Sound that wraps around (outside the ear canal 101) is easily transmitted into the air chamber 95. And since the end 80a of the baffle tube 80 on the body 52 side is in airtight contact with the body 52 over the entire circumference, the sound transmitted into the air chamber 95 is behind the air chamber 95 (in the ear canal 101). It becomes difficult to communicate to the outside. Thereby, sound leakage to the outside of the external auditory canal 101 is more effectively suppressed, and the mid / low frequency reproducibility becomes better.

In the earphone 12 of the eighth embodiment, since the flexible baffle tube 80 existing between the earphone casing 50 and the cap 70 also serves as a cushion, the synergistic action of the cap 70 and the baffle tube 80 allows the conventional The earphone can realize a very good wearing feeling that cannot be experienced.

Further, the earphone 12 of the eighth embodiment includes a first resonance chamber 91, a second resonance chamber 92, and a third resonance chamber 93, and the first resonance chamber 91 and the second resonance chamber 92 are narrow passages (port 62e). ), The bass is amplified. And since the 2nd resonance chamber 92 and the 3rd resonance chamber 93 are connected by the thin channel | path (internal space 94), a bass is further amplified.

Moreover, since the outer surface of the end 80a of the baffle tube 80 is exposed, the earphone 12 of the eighth embodiment can recognize the presence of the air chamber 95 from the outside. By using, for example, translucent silicone rubber as the material of the baffle tube 80, the presence of the air chamber 95 can be more easily recognized from the outside. As described above, according to the eighth embodiment, the earphone 12 having a novel structure including the air chamber 95 is realized. In addition, by adopting a structure in which the baffle tube 80 can be visually recognized from the outside, a novel earphone 12 having both high acoustic performance and functional beauty can be realized.

The embodiment of the present invention is not limited to the above-described embodiment, and various changes, substitutions, and modifications may be made without departing from the spirit of the technical idea of the present invention.

For example, the earphones 1 of the first to fourth embodiments all include the core member 4, but the core member 4 is not an essential component.
The earphones 1 of the first to fourth embodiments all include the sound pickup device 5, but the sound pickup element 5 is not an essential component.

In addition to the configuration of the fourth embodiment, it is desirable to include a sub baffle member 8. Moreover, in 4th Embodiment, although the position of the core member 4 with respect to the fitting member 9 is decentered, it is not necessarily required to decenter.
Moreover, in 4th Embodiment, although the cap 3 and the fitting member 9 are arrange | positioned on both sides of the baffle member 7, when the baffle member 7 is abbreviate | omitted, the cap 3 and the fitting member 9 are directly joined or integrated. It may be formed.

Also, the earphone 1 of the first to fourth embodiments can adopt the wireless system as in the fifth embodiment.

In the fifth embodiment, the material (specific gravity, flexibility, sound permeability) of the skin contact member 19A is different from the material (specific gravity, flexibility, sound permeability) of the acoustic unit housing member 19B. Both materials may be the same.

Further, in the fifth to seventh embodiments, the ear wearing body 19 is constituted by the skin contact member 19A and the acoustic unit housing member 19B. However, even if the entire ear wearing body 19 is manufactured as an integrated product from the beginning. Good. In this case, it is preferable that a cut portion is formed in the ear mounting body 19 so that the acoustic unit 11 can be mounted in the cavities 19c and 19Ac through the cut portion.

Further, in the fifth to seventh embodiments, the ear wearing body 19 is constituted by a member having air permeability, but the ear wearing body 19 may be constituted by a member having no air permeability. When the ear wearing body 19 is a member that does not have air permeability, a gap needs to be partially formed between the ear wearing body 19 and the skin of the ear 100.

Also, in the fifth to seventh embodiments, the ear mounting body 19 can be realized by a flexible silicone sponge. By adopting a structure in which the entire acoustic unit 11 is wrapped with a light-transmitting silicon sponge, a novel earphone 10 that is transparent and has elasticity like a candy gummy (jelly body) is realized. Is possible. In addition, by adopting a water-repellent silicone sponge for the ear attachment 19, the completely waterproof earphone 10 can be realized.

In the seventh embodiment, the first terminal 41A provided on the first cable 40A side may be a female terminal, and the second terminal 41B provided on the second cable 40B side may be a male terminal.

In the seventh embodiment, the first terminal 41A attached to the first cable 40A is connected to the second terminal 41B attached to the second cable 40B. However, as illustrated in FIG. In addition, the first terminal 41 A may be connected to the receiving device 49. In this case, the second terminal 41B is provided in the receiving device 49. In this case, the second cable 40B is omitted.

In the eighth embodiment, an annular narrow gap is formed between the tip 80b of the baffle tube 80 and the protector 54, but the gap is not an essential component. There is a possibility that the absence of the gap or the absence of the gap may be advantageous in improving the mid-bass reproducibility. Further, the air chamber 95 having a sealed structure may be formed by the baffle tube 80 and the head portion 51 of the earphone casing 50. There is a possibility that the baffle tube 80 can function as a higher performance acoustic amplifier due to the structure in which the air in the air chamber 95 having a sealed structure resonates with the sound emitted from the driver unit 60.

Moreover, although the earphone 12 of the eighth embodiment includes the first resonance chamber 91, the first resonance chamber 91 is not an essential component.

The earphone 12 of the eighth embodiment includes the second resonance chamber 92, but the second resonance chamber 92 is not an essential component.

Moreover, although the earphone 12 of the eighth embodiment includes the third resonance chamber 93 and the internal space 94, the third resonance chamber 93 and the internal space 94 are not essential components.

The earphone 12 of the eighth embodiment includes the driver casing 62 as the first enclosure, but the driver casing 62 is not an essential component. That is, the head part 51 of the earphone casing 50 may constitute the driver unit 60.

Further, in the earphone 12 of the eighth embodiment, an acoustic vibration absorbing layer may be provided in the space on the body portion 52 side of the air chamber 95 (the space on the right side in the drawing). By providing the acoustic vibration absorbing layer in the air chamber 95, it is possible to enhance the performance of preventing sound leakage to the outside of the ear canal 101 by the baffle tube 80. As an example of the material of the acoustic vibration absorbing layer, αGEL (registered trademark) developed by Taika Co., Ltd. can be mentioned. αGEL (registered trademark) is a soft gel-like material mainly composed of silicone.

In the eighth embodiment, the diaphragm 61a is exemplified as the sound emitting part of the driver unit 60, but the sound emitting part is not limited to the diaphragm 61a. The sound emission part of the driver unit 60 may be an outlet (window) of sound emitted from a vibrating body that is a sound generation source. That is, the driver unit 60 is not limited to the dynamic type, and may be a balanced armature type. Further, the driver unit 60 may include a plurality of electroacoustic transducers 61 having different acoustic characteristics, such as for low frequencies, for mid frequencies, and for high frequencies.

In the eighth embodiment, a tubular member (baffle tube 70) is used as the interposition member. Instead, a torus-like flexible hollow member (baffle torus) surrounding the earphone casing 50 is used. May be. The baffle torus is stably held in the earphone casing 50 by being attached to a constricted portion (neck portion 53) between the head portion 51 and the body portion 52 of the earphone casing 50.

In the eighth embodiment, the interposition member is referred to as a “baffle tube”, but may be referred to as an “air tube” in the sense of having an air chamber 95. For the same purpose, “baffle torus” may be referred to as “air torus”. Further, the interposition member may be referred to as “air cushion” or “cushion tube” in the sense that it acts as a cushion.

Moreover, in the said embodiment, although the member which consists of sponge materials is used as the

caps

3 and 70 and the skin contact member 19A, if it is a member which has a softness | flexibility, elasticity, and air permeability, it will be restricted to the member which consists of sponge materials. Absent.

In the above embodiment, a member made of a sponge material is used as the fitting member 9 and the acoustic unit housing member 19B. However, the member is not limited to a member made of a sponge material as long as it has flexibility and elasticity.

In the above embodiment, the example of the earphone is shown as an example of the embodiment of the acoustic device. However, the acoustic device according to the present invention includes an acoustic device other than the earphone. Examples of acoustic devices other than earphones include devices equipped with a microphone, such as hearing aids and income.

[Summary]
This specification describes at least the following matters. In addition, although the component etc. which respond | correspond in the above-mentioned embodiment are shown in a parenthesis, it is not limited to this.

(1-1): An acoustic device (earphone 1, earphone 10, earphone 12) used by being worn on the ear (ear 100), an electroacoustic transducer (

driver unit

1, 12, 60), and skin contact Members (cap 3, cap 70, skin contact member 19A), and the electroacoustic transducer has a sound emitting part (sound emitting part 2a, sound emitting part 12a, diaphragm 61a), and the electric The acoustic transducer is disposed with the sound emitting unit facing the external auditory canal (the ear canal 101), the skin contact member is a member that covers the sound emitting unit of the electroacoustic transducer, and the skin contact member is It is a member that transmits sound emitted from the sound emitting part of the electroacoustic transducer, the skin contact member is a member having flexibility, elasticity, and air permeability, and the skin contact member is disposed on the ear canal. By fitting, the electroacoustic deformation It supports away vessels from the inner wall (inner wall 103) of the ear canal, an acoustic device.

In the acoustic device of (1-1), since the skin contact member that fits into the ear canal is a member having flexibility and elasticity, it feels good when worn on the ear, and the ear is painful even if worn for a long time. Hard to occur.
The acoustic device of (1-1) is less likely to generate touch noise because the ear is not airtightly closed.

(1-2): An acoustic device that is worn on an ear and used, and the acoustic device includes an electroacoustic transducer and a skin contact member that covers a sound emitting portion of the electroacoustic transducer, The electroacoustic transducer is disposed with the sound emitting portion facing the inside of the ear canal, and the skin contact member is a member that fits into the ear canal and transmits sound emitted from the electroacoustic transducer. When the skin contact member is fitted into the ear canal, the electroacoustic transducer is supported away from the peripheral wall of the ear canal, and the sound emitting portion of the electroacoustic transducer is an inlet (inside the ear canal) An acoustic device arranged near the entrance 102).

According to the acoustic device of (1-2), when the skin contact member is fitted into the ear canal, the electroacoustic transducer is supported away from the peripheral wall of the ear canal, and the sound emitting portion of the electroacoustic transducer is disposed in the ear canal. Therefore, the sound emitted from the electroacoustic transducer can be recognized by making the best use of the ability of the part around the outer ear to sense the sound.

(2): The acoustic device of (1-1) or (1-2) further includes a fitting member (fitting member 9), and the fitting member is a member having flexibility and elasticity. The acoustic device can be stably attached to the ear by fitting the fitting member into the concha cavity (the concha cavity 106).

In the acoustic device of (2), since the fitting member having flexibility and elasticity fits in the concha cavity, the acoustic device is stably attached to the ear. Hard to cause pain in ears even when worn.

(3): The acoustic device according to any one of (1-1) to (2) further includes a core member (core member 4), and the electroacoustic transducer is accommodated at one end of the core member. And an acoustic device to which the skin contact member is attached.

(3) The acoustic device can protect the electroacoustic transducer with a core member. Further, the core member can also function as a portion that is picked up with a finger when the acoustic device is attached to or removed from the ear.

(4): The acoustic device according to (3), wherein the fitting member is provided around the core member.

(4) The acoustic device can secure the fitting member mounting portion and stably maintain the relative positional relationship between the electroacoustic transducer and the skin contact member and the fitting member.

(5): It is an acoustic device used by being worn on an ear, wherein the acoustic device has an electroacoustic transducer and a skin contact member, and the electroacoustic transducer has a sound emitting part. The electroacoustic transducer is disposed with the sound emitting part facing the ear canal, the skin contact member is a member covering the sound emitting part of the electroacoustic transducer, and the skin contact member emits sound. The skin contact member is a member having flexibility and elasticity, and the skin contact member is fitted into the concha cavity while allowing air to flow to the ear canal, An acoustic device that supports the electroacoustic transducer facing the ear canal.

In the acoustic device of (5), the skin contact member that fits into the concha cavity is a member that has flexibility and elasticity. It is hard to produce.
Since the acoustic device of (5) does not airtightly block the ear, touch noise hardly occurs.

(6): The acoustic device according to (5), comprising: an acoustic unit having at least the electroacoustic transducer; and an ear mounting body that envelops the entire acoustic unit, wherein the ear mounting body is flexible and elastic. An acoustic device, wherein the skin contact member forms part of the ear wearing body, and only the ear wearing body contacts the ear when the acoustic device is used.

In the acoustic device of (6), since the ear mounting body that comes into contact with the ear when the acoustic device is used is a member having flexibility and elasticity, the ear mounting feeling is good and the ear can be worn even for a long time. It is hard to cause pain.

(7): An acoustic device that is worn on the ear and used, and the acoustic device includes an electroacoustic transducer (driver unit 60), a skin contact member (cap 70), and an interposition member (baffle tube 80). The electroacoustic transducer has a sound emitting part (diaphragm 61a) and a side part (side part 61c) covered with the skin contact member, and the skin contact member has flexibility, elasticity and It is a member that has air permeability and transmits sound, and the interposition member is directly or indirectly fixed to the electroacoustic transducer and exists between the skin contact member and the electroacoustic transducer. And making the relative movement between the electroacoustic transducer and the skin contact member difficult due to the frictional force between the skin contact member and the skin contact member fitting into the external auditory canal. From the inner wall of the ear canal It is supported by an acoustic device.

In the acoustic device of (7), since the skin contact member is a member having flexibility, elasticity and breathability, the feeling of wearing on the ear is good, and it is difficult to cause pain in the ear even when worn for a long time.
In the acoustic device of (7), since the skin contact member has air permeability, the ear canal is not hermetically sealed when worn on the ear. For this reason, so-called touch noise hardly occurs.
In the acoustic device of (7), since the relative movement between the electroacoustic transducer and the skin contact member is difficult due to the frictional force between the interposition member and the skin contact member, the position of the skin contact member relative to the electroacoustic transducer Misalignment and inadvertent detachment of the skin contact member are prevented.

(8): The acoustic device according to (7), wherein the interposed member forms an air chamber (air chamber 95) between the skin contact member and the electroacoustic transducer.

(8) Since the air chamber exists between the skin contact member and the electroacoustic transducer, the acoustic device of (8) has good mid-low sound reproducibility.

(9): The acoustic device according to (8), wherein the interposition member forms the air chamber surrounding the electroacoustic transducer and vibrates with air vibration in the air chamber.

According to the acoustic device of (9), since the vibration of the air in the air chamber is transmitted to the inner wall of the ear canal via the skin contact member, the vibration of the sound emitted from the electroacoustic transducer is perceived through the skin of the ear canal. It becomes possible to do.

(10): In the acoustic device of (1-1) to (9), a first enclosure (driver casing 62) that houses the electroacoustic transducer and a second enclosure (earphone casing 50) that houses the first enclosure. And the first enclosure forms a first resonance chamber (first resonance chamber 91) between the first enclosure and the electroacoustic transducer, and the second enclosure communicates with the first enclosure. A second resonance chamber (second resonance chamber 92) is formed therebetween, and the first enclosure is provided with a port (port 62e) that allows the first resonance chamber and the second resonance chamber to communicate with each other. , Sound equipment.

(10) Since the bass sound is amplified by the first resonance chamber and the second resonance chamber, the mid-bass reproducibility is better.

(11): The acoustic device according to (10), wherein a third resonance chamber (third resonance chamber 93) communicating with the second resonance chamber is formed in the second enclosure.

(12) Since the bass is further amplified by the second resonance chamber and the third resonance chamber, the mid-bass reproducibility is further improved.

(13): The acoustic device according to (12), wherein a communication portion (internal space 94) between the second resonance chamber and the third resonance chamber in the second enclosure is constricted.

In the acoustic device of (13), the bass is further amplified by the change in the viscosity of the air in the communication portion between the second resonance chamber and the third resonance chamber, so that the mid-bass reproducibility is further improved.

(14) The acoustic device according to any one of (1-1) to (13), wherein the skin contact member is a member made of a sponge material.

In the acoustic device of (14), since the skin contact member that comes into contact with the ear when using the acoustic device is made of a sponge material, touch noise is less likely to occur, the touch feeling to the ear is good, and even when worn for a long time Hard to cause pain in ears.

(15): The acoustic device according to any one of (1-1) to (14), wherein an outer shape of the skin contact member is a spherical shape.

(15) Since the external shape of the skin contact member is spherical, the acoustic device of (15) is easy to fit in the ear canal of many people. Moreover, the sound emitted from the electroacoustic transducer is emitted radially into the ear canal without any deviation. Further, even if the mounting angle with respect to the ear changes slightly, the skin contact member is interposed between the interposition member and the inner wall of the ear canal, and the electroacoustic transducer is supported separately from the inner wall of the ear canal.

DESCRIPTION OF SYMBOLS 1: Earphone (acoustic device) 2: Electroacoustic transducer 2a: Sound emission part 3: Skin contact member 4: Core member 5: Sound pickup device 7: Baffle member 8: Sub baffle member 9: Fitting member 10: Earphone (acoustic device) 11: Acoustic unit 19: Ear wearing body 40: Cable 40A: First cable 40a: One end 40B Second cable 41A: First terminal 40Aa: Other end 41B: Second terminal 49: Receiving device 12: Earphone (acoustic device) )
50: Earphone casing (second enclosure)
51: Head part 52: Body part 53: Neck part 54: Protector 60: Driver unit (electroacoustic transducer)
61: Electroacoustic transducer 61a: Diaphragm (sound emitting part)
62: Driver casing (first enclosure)
62e: port 63: electromechanical coupling system 70: cap (skin contact member) 80: baffle tube (interposition member)
91: first resonance chamber 92: second resonance chamber 93: third resonance chamber 94: internal space 95: air chamber 100: ear 101: ear canal 102: entrance 103: inner wall 106: ear concha

Claims

An audio device worn on the ear and used.
The acoustic device includes an electroacoustic transducer, and a skin contact member that covers a sound emitting portion of the electroacoustic transducer,
The electroacoustic transducer is arranged with the sound emitting part facing the inside of the ear canal,
The skin contact member is a member having flexibility, elasticity and breathability, and transmitting sound,
An acoustic device that supports the electroacoustic transducer by facing the ear canal by fitting the skin contact member into the ear canal.
Further having an interposition member,
The interposed member is directly or indirectly mounted on the electroacoustic transducer, and is present between the skin contact member and the electroacoustic transducer, and the interacoustic transducer and the skin contact member The acoustic device according to claim 1, wherein an air chamber is formed therebetween.
The acoustic device according to claim 2, wherein the interposition member is made of a flexible elastomer.
The interposition member is
The acoustic device according to claim 3, wherein the air chamber that surrounds the electroacoustic transducer is formed and vibrates in accordance with air vibration in the air chamber.
The acoustic device according to any one of claims 1 to 4, wherein the skin contact member is made of a sponge material.