WO2009107578A1 - Acoustic device - Google Patents

Abstract

Provided is an acoustic device which can always exhibit a preferable hearing performance with ear pieces for sound isolation inserted into external ear canals of a user. The acoustic device is used with the ear pieces (21R, 21L) inserted into the right and the left external ear canal (H (R, L)) and a part of a contact surface (24a) of a right and a left contact portion (24R, 24L) of a mounting body (11) in abutment with a protrusion of an oscillator (23) protruding from a non-insert side surface (22b) of the ear piece body (22). Even if the contact surface (24a) of the contact portions (24R, 24L) is inclined with respect to the non-insert side surface (22b) of the ear piece body (22), the oscillation of the contact portions (24R, 24L) is effectively transferred to the ear pieces (21R, 21 H(L)).

Description

Sound equipment

The present invention relates to an acoustic device of a type used by being worn on the head or ear. More specifically, the present invention relates to an acoustic device that is used in a state where a sound insulating earplug is inserted into the ear canal.

As an acoustic device that is used in a state in which a sound insulating earplug is inserted into the external auditory canal, a device that is used by pressing a solid conduction speaker (vibration generation source) against the end surface of the earplug on the non-insertion side is known. (Patent Documents 1 to 3)
Japanese Utility Model Publication No. 6-26328 JP-A-5-207579 Utility Model Registration No. 3035669 (page 4)

The above-described conventional acoustic device is configured to transmit the vibration of the solid conduction speaker to the earplug in a state where the non-insertion side end face of the earplug and the vibration surfaces of the solid conduction speaker are in surface contact with each other. For this reason, in this type of conventional acoustic device, when the vibration surface of the solid conduction speaker is inclined with respect to the end surface of the earplug on the side opposite to the insertion side, the transmission efficiency of vibration decreases due to poor contact between both surfaces. The acoustic performance of can not be demonstrated.

The problem to be solved by the present invention is to provide an acoustic device that can always exhibit good listening performance in a state where a sound-insulating earplug is inserted into the ear canal.

The acoustic device of the present invention includes the following acoustic devices (1) to (33).
(1): An acoustic device having the following features 1 to 5.
(2): An acoustic device having the following features 1 to 6.
(3): The acoustic device according to (2) further having the following characteristics 6-2.
(4) The acoustic device according to (1), further having the following characteristics 6-3.
(5) The acoustic device according to (3) or (4), further having the following characteristics 6-4.
(6): The acoustic device according to any one of (1) to (5), further including the following feature 7.
(7): The acoustic device according to (6) further having the following feature 8.
(8) The acoustic device according to (6) or (7), further having the following feature 9.
(9): The acoustic device according to (8) further having the following feature 9-2.
(10) An acoustic device having the following features 1, 4-2, 5, and 10.
(11) The acoustic device according to (10), further including the following feature 9-2.
(12): The acoustic device according to (11) further having the following feature 10-3.
(13) The acoustic device according to any one of (10) to (12), further including the following features 3 and 11.
(14) The acoustic device of (13) further having the following feature 11-2.
(15): An acoustic device having the following features 1, 12, and 5.
(16) The acoustic device according to (15), further including the following features 13 and 13-2.
(17): The acoustic device of (16) further having the following feature 13-3.
(18) The acoustic device according to any one of (15) to (17), further having the following feature 14.
(19) The acoustic device according to (18), further comprising the following feature 14-2.
(20): An acoustic device having the following features 1, 2, 15, 16, 17, and 18.
(21) The acoustic device according to (20), further including the following features 19, 18-2, and 20.
(22) The acoustic device according to (20), further comprising the following features 19-2 and 20-2.
(23) The acoustic device according to (21), further including the following features 19-3, 20-3, and 21.
(24) The acoustic device according to any one of (21) to (23), further having the following feature 22.
(25): The acoustic device according to any one of (21) to (23), further including the following feature 23:
(26) The acoustic device according to any one of (21) to (25), further including the following feature 24:
(27) The acoustic device according to any one of (21) to (26), further having the following feature 15-2.
(28) The acoustic device according to (27), further including the following feature 15-3.
(29) The acoustic device according to any one of (1) to (9) or any one of (20) to (28), further having the following feature 25:
(30) The acoustic device according to any one of claims (10) to (12), further comprising the following feature 26:
(31) The acoustic device according to (27), further including the following feature 25-2.
(32) The acoustic device according to (28), further comprising the following feature 26-2.
(33): The acoustic device according to any one of (1) to (30), further including the following feature 27:
(34) The acoustic device according to any one of (1) to (31), further having the following feature 28:
(35): The acoustic device according to any one of (1) to (31), further including the following feature 29:
(36) The acoustic device according to any one of (1) to (31), further including the following feature 30:

Feature 1: It has a mounting body that is detachably mounted on the user's head or ear. (FIG. 14, FIG. 5, FIG. 6, FIG. 7, FIG. 10, FIG. 12, FIG. 13, FIG. 15, FIG. 22, FIG. 28, FIG. 29, FIG. 34)
Feature 2: It has a first ear plug that is attached to one of the user's external ear canals, and a second ear plug that is attached to the other ear canal of the user. (2, 3, 9, 10, 11, 16, 17, 20, 21, FIG. 35, FIG. 36, FIG. 37, FIG. 38, FIG. 39, FIG. 40, FIG. 41, FIG. 42, FIG. 43, FIG. 44, FIG. 45)
Feature 3: Each of the first ear plug and the second ear plug has an ear plug body and a vibrating body that is inserted and held concentrically with the ear plug body. One end portion (insertion side end portion) of the vibrating body is buried in the earplug body. The other end of the vibrating body (anti-insertion side end, exposed side end) protrudes from the end surface (anti-insertion side end surface, exposed side end surface) of the earplug that is exposed from the external auditory canal. (FIG. 2, FIG. 3, FIG. 9, FIG. 10, FIG. 11, FIG. 16, FIG. 17, FIG. 20, FIG. 21)
Feature 4: The wearing body includes a first contact portion that contacts the vibrating body of the first ear plug that is attached to one of the user's external ear canals, and a second ear that is attached to the other external ear canal of the user. And a second contact portion that contacts the vibrating body of the stopper. (FIG. 3, FIG. 6, FIG. 8, FIG. 13, FIG. 14, FIG. 15, FIG. 18, FIG. 19)
Feature 4-2: The wearing body has a first contact portion that contacts an earplug attached to one of the user's external ear canals and a second contact portion that contacts the earplug attached to the other external ear canal of the user. A contact portion. (FIGS. 22, 24, 25, and 26)
Feature 5: The mounting body includes a first acoustic vibration generation source that vibrates the first contact portion, and a second acoustic vibration generation source that vibrates the second contact portion. (FIG. 3, FIG. 14, FIG. 18, FIG. 19, FIG. 24, FIG. 31, FIG. 32, FIG. 33)
Feature 6: The vibrating body has a rod-like portion with one end inserted into the earplug body, and the other end of the rod-like portion protrudes from the end face of the earplug body. (FIG. 2, FIG. 3, FIG. 9, FIG. 10, FIG. 11, FIG. 16, FIG. 17, FIG. 20, FIG. 21)
Feature 6-2: The tip of the other end of the rod-shaped portion is enlarged in diameter. (FIGS. 2, 3, 8, and 9 (b) to (f))
Feature 6-3: The vibrator has a rod-like portion that is inserted into the earplug body and is completely or almost completely embedded, and the earplug body is provided at an end of the rod-like portion on the exposed side. And having an enlarged diameter portion protruding from the end face. (FIG. 2, FIG. 3, FIG. 10, FIG. 16, FIG. 17, FIG. 20, FIG. 21)
Feature 6-4: The enlarged diameter portion is formed in a hemispherical shape or a spherical shape. (FIG. 2, FIG. 3, FIG. 8, FIG. 9 (b), FIG. 9 (c))
Feature 7: The contact surfaces of the first contact portion and the second contact portion that are in contact with the vibrating body are flat or concave, and the vibrating body contacts a part of the contact surface. (FIG. 3, FIG. 6, FIG. 13, FIG. 14, FIG. 15, FIG. 18, FIG. 19)
Feature 8: The first contact portion and the second contact portion are formed with recesses that fit into the vibrating body. (Fig. 8)
Feature 9: The first ear plug has a fitting portion that fits with the first contact portion. The second ear plug has a fitting portion that fits with the second contact portion. (FIG. 10, FIG. 11, FIG. 16, FIG. 17, FIG. 20, FIG. 21, FIG. 32)
Feature 9-2: The first contact portion bulges out in a spherical band shape. The inner peripheral portion of the fitting portion of the first ear plug is formed in a spherical shape so that the first contact portion can be inserted and removed and can be in close contact therewith. The second contact portion bulges in a spherical band shape. The inner peripheral portion of the fitting portion of the second ear plug is formed in a spherical band shape so that the second contact portion can be inserted and removed and can be in close contact therewith. (FIGS. 15, 17, 18, 19, and 32)
Feature 10: The first contact portion and the second contact portion have a protrusion having a smaller diameter than the earplug. The protruding end of the protruding portion contacts the end surface of the earplug that is exposed from the ear canal. (FIGS. 22, 24, 25, 26, and 28)
Feature 10-2: The protruding portion protrudes in a bar shape. (FIGS. 22, 24, 25, 26, and 28)
Feature 10-3: The protrusion has an enlarged diameter portion at the tip. (Fig. 26)
Feature 11: The vibrating body includes a rod-like portion that is completely or almost completely buried in the earplug body, and a plate-like portion that is formed in a flange shape at an end of the rod-like portion that is exposed. Have The protruding end portion is in contact with the plate surface of the plate-like portion. (Fig. 27)
Feature 11-2: The plate surface is a partially concave spherical surface. (Fig. 27 (b))
Feature 12: The wearing body has a first contact portion (connecting portion) having a rod-like protrusion portion that is inserted in an airtight manner so that it can be inserted into and removed from a connecting hole formed in an earplug attached to one of the user's external ear canals. And a second contact portion (connecting portion) having a rod-like protrusion portion that is inserted in an airtight manner in a connecting hole formed in an earplug attached to the other external ear canal of the user. . (FIGS. 29, 31, 32, and 33)
Feature 13: The earplug includes a flange portion that closely contacts and closes the inner wall of the ear canal, and a handle portion that extends from the center of the flange portion to the outside of the ear canal. The earplug is made of (silicon rubber, polyvinyl chloride, etc. (FIGS. 30, 31, and 32 (c)).
Characteristic 13-2: The connecting hole is opened on the end surface of the handle portion. (FIGS. 30, 31, and 32 (c))
Feature 13-3: The flange portion has an umbrella shape (parabolic shape), an annular shape, or a spiral shape. (FIGS. 30, 31, and 32 (c))
Feature 14: The earplug has a fitting portion that fits with each contact portion (connecting portion). (Fig. 32 (c))
Feature 14-2: The contact portion (connecting portion) bulges in a spherical band shape. The inner peripheral part of the fitting part is formed in a spherical shape so that the contact part (connecting part) can be inserted and removed and can be brought into close contact therewith. (FIGS. 32 and 33)
Feature 15: Each of the first ear plug and the second ear plug has an ear plug body and a vibration source unit. The vibration source unit is attached to the end of the earplug that is exposed from the ear canal. The vibration source unit includes a magnetic vibrating body. The magnetic vibrating body vibrates due to the fluctuation of the magnetic field acting from the outside of the vibration source unit. (FIGS. 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 45, and 46)
Feature 15-2: A concentric through-hole is formed in the center of the earplug. (FIGS. 35, 36, 37, 38, 39, 41, and 42)
Feature 15-3: The through hole communicates with the internal space of the casing. (FIGS. 35, 36, 38, 41, and 42)
Feature 16: The wearing body is attached to the first earplug vibration source unit of the first earplug that is attached to one of the user's external ear canals, and is attached to the other external ear canal of the user. And a second contact portion that is detachably connected to the vibration source unit of the second earplug. (FIGS. 35, 36, 37, 38, 39, 41, 42, 43, 44, and 45)
Feature 17: The first contact portion incorporates a first magnetic field generation source that vibrates the magnetic vibrating body in the vibration source unit of the first earplug. The first contact portion incorporates a second magnetic field generation source that vibrates the magnetic vibrating body in the vibration source unit of the second earplug. (FIG. 35 (c), FIG. 36, FIG. 38, FIG. 41, FIG. 42, FIG. 43 (c), FIG. 44 (c), FIG. 45)
Feature 18: Both contact portions have a fitting portion that fits with the vibration source unit. (FIGS. 35 (c), 36, 37 (c), 38, 39 (c), 41, 42, 43 (c), 44 (c), 44 (d), FIG. 45)
Feature 18-2: Both contact portions have a recess that fits into the protrusion of the vibration source unit. (FIGS. 35 (c), 36, 37 (c), 38, 39 (c), 41, 42, 43 (c), 44 (c), 44 (d), FIG. 45)
Feature 19: The vibration source unit has a dielectric casing. The casing has a convex portion. (FIGS. 35 (a), 35 (b), 36, 37 (a), 38, 39 (a), 40, 41, 42, 43 (a), 43 (b) ), FIG. 44 (a), FIG. 44 (b), FIG. 45, FIG. 46)
Feature 19-2: The convex portion is a disc-shaped convex portion. (FIG. 35 (a), FIG. 35 (b), FIG. 36, FIG. 37 (a), FIG. 38, FIG. 39 (a), FIG. 40, FIG. 41, FIG. 42)
Feature 19-3: The convex portion is a rod-shaped convex portion. (FIG. 43 (a), FIG. 43 (b), FIG. 44 (a), FIG. 44 (b), FIG. 45, FIG. 46)
Feature 20: The magnetic vibrating body is provided in a convex portion of the casing. (FIG. 35 (a), FIG. 35 (b), FIG. 36, FIG. 38, FIG. 40, FIG. 41, FIG. 42, FIG. 43 (a), FIG. 43 (b), FIG. 45, FIG. 46)
Feature 20-2: The magnetic vibrating body is a disk-shaped magnetic vibrating body. (FIG. 35 (a), FIG. 35 (b), FIG. 36, FIG. 38, FIG. 40, FIG. 41, FIG. 42)
Feature 20-3: The magnetic vibrating body is a rod-shaped magnetic vibrating body. It is provided coaxially with the convex portion. (FIG. 43 (a), FIG. 43 (b), FIG. 45, FIG. 46)
Feature 21: Both magnetic field generation sources are provided so as to surround the recess. (Fig. 43 (c), Fig. 45)
Feature 22: The outer peripheral portion of the convex portion and the inner peripheral portion of the concave portion are detachably engaged with each other. (FIGS. 38, 39, 40 (b), 40 (f), 41, 42)
Feature 23: Both contact portions accommodate the exposed portion of the vibration source unit and contact the end surface of the earplug over the entire circumference. (FIGS. 41 and 42)
Feature 24: The vibration source unit has an acoustic tube portion that is coaxially inserted into the earplug body. (FIG. 40 (e), FIG. 40 (f), FIG. 42)
Feature 25: The earplug is made of a foam material. The foam material has both shape recovery and flexibility. (FIGS. 2, 3, 9, 27, 35, 36, 37, 38, 39, 40, 41, 42, 43, and 45)
Feature 25-2: The earplug body has a cylindrical shape (FIGS. 2, 3, 9, 27, 35, 36, 37, 38, 39, 40 (a), 40 ( b), FIG. 40 (c), FIG. 40 (e), FIG. 40 (f), FIG. 41, FIG. 42, FIG. 43, FIG. 45) or a substantially cylindrical shape with a narrowed end on the side inserted into the ear canal. The earplug body (FIG. 40 (d)) or the earplug body (FIGS. 10, 11, 16, and 17) having a flange portion that is in close contact with the inner wall of the external auditory canal and closes it.
Feature 26: The earplug is made of a foam material. The foam material has both shape recovery and flexibility. (FIGS. 23 and 24)
Feature 26-2: The earplug is a cylindrical shape (FIGS. 23 and 24) or a substantially cylindrical shape whose end on the side inserted into the external auditory canal is thin (see the earplug 110 in FIG. 40D). The earplug has a circular end surface on the side exposed from the ear canal.
Feature 27: The mounting body has a watertight structure in which the inside is isolated from the outside. (FIGS. 3, 14, 18, 19, 24, 31, 32, 33, 35 (c), 36, 38, 41, 42, 43, 45)
Feature 28: The wearing body includes a first ear hook body having a first contact portion and a first acoustic vibration generation source, a second ear hook body having a second contact portion and a second acoustic vibration generation source, and Consists of. The first ear hanging body is attached to one ear of the user. The second ear hook is attached to the other ear of the user. (FIGS. 5, 6, 7, and 28)
Characteristic 29: The mounting body has an arcuate or substantially horseshoe-shaped elastic body portion that straddles the user's head when mounted. When the mounting body is mounted, the first contact portion and the second contact portion are urged toward each other by the elastic force of the elastic body portion. (FIGS. 1, 22, and 29)
Characteristic 30: The wearing body straddles the arcuate or substantially horseshoe-shaped headband portion straddling the back of the user when worn, and the root of the user's auricle (ear shell) from the left and right ends of the headband portion. And an arm portion extending in an arch shape and an arm portion extending from both ear hook portions to the user's ear hole. The contact portion is provided at the tip of each arm portion. (FIG. 4, FIG. 10, FIG. 12, FIG. 13, FIG. 14, FIG. 15, FIG. 34)

The acoustic device of the present invention always exhibits good listening performance with a sound-insulating earplug inserted into the ear canal.

Hereinafter, embodiments of the present invention will be described.

1. First Example 1-1-1. Configuration FIG. 1, FIG. 2 and FIG. 3 are diagrams showing an example of an acoustic device according to the present invention.
The acoustic device 1 shown in FIGS. 1, 2, and 3 has the following features 1 to 5, 6-2, 6-3, 6-4, 7, 27, and 29.
Feature 1: It has the mounting body 11 which is detachably mounted on the user's head (including the jaw).
Feature 2: The first ear plug 21R attached to the external ear canal H (R) of one (right ear) of the user and the second ear attached to the external ear canal H (L) of the other (left ear) of the user. And a stopper 21L.
Feature 3: Each of the first ear plug 21R and the second ear plug 21L includes an ear plug body 22 and a vibrator 23 inserted and held concentrically with the ear plug body 22. One end portion (hereinafter, also referred to as an insertion side end portion) 23 a of the vibrating body 23 is embedded in the earplug body 22. The other end portion (hereinafter also referred to as an anti-insertion side end portion) 23b of the vibrating body 23 is an end surface (hereinafter also referred to as an anti-insertion side end surface) of the earplug body 22 exposed from the external auditory canal H (R, L). .) Protrudes from 22b.
Feature 4: The wearing body 11 includes a first contact portion 24R that comes into contact with the vibrating body 23 of the first ear plug 21R attached to the external ear canal H (R) of one (right ear) of the user, and the user's A second contact portion 24L that contacts the vibrating body 23 of the second ear plug 21L attached to the other ear canal H (L).
Feature 5: The mounting body 11 includes a first acoustic vibration generation source 25R that vibrates the first contact portion 24R and a second acoustic vibration generation source 25L that vibrates the second contact portion 24L.
Feature 6-3: The vibrating body 23 has a rod-like portion 23c that is inserted into the earplug body 22 and is completely or almost completely embedded, and the earplug body 22 is provided at the end 23b opposite to the insertion side of the rod-like portion 23c. It has an enlarged diameter portion 26 protruding from the end surface 22b on the opposite side.
Feature 6-4: The enlarged diameter portion 26 is formed in a hemispherical shape.
Feature 7: The contact surface 24a of the first contact portion 24R and the second contact portion 24L with the vibrating body 23 is a flat surface. The vibrating body 23 contacts a part of the contact surface 24a.
Feature 25: The earplug 22 is made of a foam material. The foam material has both shape recovery and flexibility.
Feature 25-2: The earplug 22 is a cylindrical earplug.
Feature 27: The mounting body 11 has a watertight structure in which the inside is isolated from the outside.
Feature 29: The wearing body 11 has an elastic body portion 29 having an arc shape or a substantially horseshoe shape that straddles the user's head when wearing. When the mounting body 11 is mounted, the first contact portion 24R and the second contact portion 24L are urged toward each other by the elastic force of the elastic body portion 29.

1-1-2. Supplementary Explanation of Configuration As shown in FIG. 1, the mounting body 11 includes an arc-shaped portion (arch portion) 11 a straddling the left and right of the user's head, and slightly inward from the left and right ends of the arc-shaped portion 11 a. And linearly extending portions (arm portions) 11R and 11L. The tip portions of both arm portions 11R and 11L are bent inwardly in an L shape. A first contact portion 24R is provided at the tip of the bent portion of the right arm portion 11R, and a second contact portion 24L is provided at the tip of the bent portion of the left arm portion 11L. The mounting body 11 is a plastic molded product. The mounting body 11 can be mounted so as to straddle the user's back head or jaw.

As shown in FIG. 3, the first contact portion 24R and the second contact portion 24L include a cylindrical wall 41 integrally formed with the arm portion 11R, and a disc-shaped movable lid attached to the distal end opening of the cylindrical wall 41. 42, and a seal body 43 that seals the space between the cylindrical wall 41 and the movable lid 42 in a watertight state.

In the first contact portion 24R and the second contact portion 24L, a vibration source accommodation chamber surrounded by the cylindrical wall 41 and the movable lid 42 is formed. The cylindrical wall 41 is formed by expanding the distal end portion of the arm portion 11R. A fitting portion 44 having a diameter reduced by about half the thickness of the cylindrical wall 41 is formed at the opening edge of the cylindrical wall 41. The movable lid 42 includes an end plate portion 45 having the same diameter as the outer diameter of the cylindrical wall 41, and a cylindrical fitting portion 46 formed on one side so as to border the end plate portion 45. Yes. The fitting portion 46 of the movable lid 42 is loosely fitted (fitted with some play) on the outside of the fitting portion 44 of the cylindrical wall 41. The surface of the movable lid 42 is a contact surface 24 a with the vibrating body 23.

The seal body 43 is a rubber member formed in a cylindrical shape. The inner surface of the seal body 43 is in close contact with the outer side of the movable lid 42 and the cylindrical wall 41 due to its rubber elasticity. An annular protrusion 43 a is formed inside the seal body 43. The annular protrusion 43 a is interposed between the end surface of the fitting portion 46 of the movable lid 42 and the step portion of the fitting portion 44 of the cylindrical wall 41. An annular engagement portion 43 b that engages with the front peripheral edge portion of the end plate portion 45 of the movable lid 42 is formed at one end edge portion of the seal body 43. An annular engagement portion 43 c that engages with the peripheral edge of the rear end of the cylindrical wall 41 is formed at the other end edge of the seal body 43. In the movable lid 42, the inner surface of the cylindrical portion of the seal body 43 is in close contact with the outer surface of the movable lid 42 and the cylindrical wall 41, and both engaging portions 43 b and 43 c are engaged with both ends of the movable lid 42 and the cylindrical wall 41. Thus, the tip end of the cylindrical wall 41 is elastically held. The movable lid 42 can be moved back and forth (in the thickness direction of the end plate portion 45) with respect to the cylindrical wall 41, but the movable range (maximum displacement amount) is a very small range due to the elastic force of the seal body 43. Is limited to.

The first acoustic vibration source 25R and the second acoustic vibration source 25L are electrodynamic electroacoustic transducers having a magnet 51 and a coil 52. The magnet 51 is held at the center of the cylindrical wall 41 via a holding member 53. The coil 52 is concentrically provided with a gap on the outside of the magnet 51. The coil 52 is fixed to the inner surface of the end plate portion 45 of the movable lid 42. A signal line 54 extending from the connection cord 55 (FIG. 1) is connected to both ends of the winding of the coil 52. A plug 56 connected to a stereo audio signal output terminal of an external device serving as an audio signal generation source is provided at the tip of the connection cord 55.

The first acoustic vibration generation source 25R and the second acoustic vibration generation source 25L convert an audio signal (electric signal) transmitted from an external device (not shown) via the signal line 54 into acoustic vibration. That is, an audio signal (electrical signal) is input to the coil 52, and the movable lid 42 is vibrated together with the coil 52 by moving the coil 52 by the interaction between the current in the coil 52 and the magnetic field of the magnet 51. When the output signal from the external device is a stereo audio signal, different audio signals (electric signals) are input to the first acoustic vibration generation source 25R and the second acoustic vibration generation source 25L, respectively. Then, both the movable lids 42 of the first contact portion 24R and the second contact portion 24L generate different acoustic vibrations.

The earplug 22 is a foamed polyurethane member formed in a cylindrical shape. A cylindrical hole 22c is formed at the center of the earplug 22 so as to extend from one end surface (counter-insertion-side end surface) 22b to the other end surface (insertion-side end surface) 22a. And the rod-shaped part 23c of the vibrating body 23 is closely inserted in this hole 22c. The insertion side end portion 23a of the rod-shaped portion 23c is in contact with the bottom of the hole 22c. The enlarged diameter portion 26 of the vibrating body 23 is formed in a hemispherical shape having a convex surface on the tip side. The vibrating body 23 is a metal (brass, iron, gold, platinum, etc.) or plastic member. The protruding length of the vibrating body 23 from the end face 22b of the earplug 21 is 2 mm to 5 mm.

The first ear plug 21R and the second ear plug 21L are inserted into the ear canal H (R, L) from the insertion-side end face 22a side while the ear plug body 22 is pinched with a finger and crushed into a thin shape. Mounted on (R, L). In the process of the earplug body 22 returning to its original state (free state) due to its self-restoring property, the outer peripheral surface of the earplug body 22 is in close contact with the inner surface of the ear canal H (R, L). By wearing the first ear plug 21R and the second ear plug 21L, it is possible to maintain a quiet environment in which the external ear canal H (R, L) of the wearer is blocked from external noise.

1-1-3. Action In this acoustic device 1, the first ear plug 21R is connected to the external ear canal H (R) of one (right) of the user, and the second ear plug 21L is connected to the external ear canal H (L) of the other (left) of the user. In the mounted state, the contact surface 24a of the first contact portion 24R is the protruding end of the vibrating body 23 of the first ear plug 21R, and the contact surface 24a of the second contact portion 24L is the vibrating body 23 of the second ear plug 21L. These are used in contact with each other. When the vibrating body 23 of the earplugs 21R, 21L and the contact portions 24R, 24L of the mounting body 11 are not in contact with each other, no vibration is generated in the earplugs 21R, 21L, and the movable portions 24R, 24L are movable. Only the lid 42 vibrates.

When the plug 56 of the connection cord 55 is connected to the stereo audio signal output terminal of the external device and an audio signal (electric signal) is output from the external device, the audio signal (electric signal) passes through the signal line 54 and the left and right contact portions 24R. , 24L are input to acoustic vibration generating sources 25R, 25L. Both acoustic vibration generation sources 25R and 25L convert the input audio signal (electrical signal) into acoustic vibration. That is, the acoustic vibration generating sources 25R and 25L vibrate the movable lids 42 of the left and right contact portions 24R and 24L, respectively, according to the input audio signal (electrical signal). When the movable lid 42 of the right ear side contact portion 24R vibrates, the vibration is transmitted to the vibrating body 23 of the earplug 21R attached to the right external ear canal H (R), and the left ear side contact portion 24L is movable. As the lid 42 vibrates, the vibration is transmitted to the vibrating body 23 of the earplug 21L attached to the left ear canal H (L). The vibrations of the vibrators 23 are transmitted to the earplugs 22 of the earplugs 21R and 21L. When the earplug body 22 vibrates, sound (sound using air as a medium) is emitted from the insertion-side end surface 22a of the earplug body 22 into the external auditory canal H (R, L), and is transmitted to the eardrum as sound. The The vibration of the earplug 22 is transmitted to the auditory organ such as the eardrum using the skin of the external auditory canal H (R, L) as a medium. The ratio (sound volume ratio) of the sound using air as a medium and the sound using skin as a medium can be adjusted by appropriately selecting the materials, dimensions, and the like of the earplug body 22 and the vibrating body 23.

Since the vibration body 23 and the movable lid 42, both of which are made of a hard material, are brought into contact with each other, the vibration of the movable lid 42 is transmitted to the vibration body 23. Therefore, the vibration transmission efficiency between the two is as follows. Compared with the transmission efficiency of vibration between the material and the hard material, it becomes much higher. The movable lid 42 does not need to be in strong pressure contact with the vibrating body 23, but may be in contact with it. The contact pressure between the two is
Adjustment is possible by appropriately selecting the rigidity (elasticity) of the arch portion 11a of the mounting body 11.

1-1-4. Effect The acoustic device 1 is mounted on the protruding end portion of the vibrating body 23 protruding from the end surface 22b on the opposite side of the earplug body 22 with the earplugs 21R and 21L attached to the left and right external auditory canals H (R, L). 11 and the left and right contact portions 24R, 24L are configured to be used in a state where a part of the contact surface 24a is in contact with the contact portion 24R, Even when the contact surface 24a of 24L is inclined, the contact failure (surface contact failure) does not occur as in the prior art, and the vibrations of the contact portions 24R, 24L are highly efficient in the earplugs 21R, 21H (L ). Therefore, the acoustic device 1 can always exhibit good listening performance.

The acoustic device 1 is attached to the vibrating body 23 of the earplugs 21R and 21L in a state where the user's external ear canal H (R, L) is kept in a quiet environment by blocking external noise by the earplugs 21R and 21L. Sound can be heard with vibration. Therefore, the acoustic device 1 can exhibit extremely high listening performance even under high noise.

The acoustic device 1 includes earplugs 21R and 21L that can block the external auditory canal H (R, L) in a watertight manner, and the mounting body 11 has a watertight structure. If it is used, it can be used even in an environment that gets wet. Since the earplugs 21R, 21L and the mounting body 11 are completely separate from each other, even when the mounting body 11 is detached from the head during use of the acoustic device 1, the earplug 21R, 21L is safe because it does not come off the external auditory canal H (R, L). That is, the earplugs 21R, 21L attached to the external auditory canal H (R, L) continue to exhibit their original functions (sound insulation function, waterproof function) even when the attachment body 11 is removed. Therefore, this acoustic device 1 can be used also in swimming and surfing.

When the mounting body 11 is not mounted, that is, when the vibration body 23 of the earplugs 21R and 21L and the contact portions 24R and 24L of the mounting body 11 are not in contact with each other, the acoustic device 1 is attached to the earplugs 21R and 21L. No vibration is generated at all, and only the movable lid 42 of the contact portions 24R, 24L vibrates. Even when the wearing body 11 is detached during use, a sound with a loud volume that causes discomfort to surrounding people is not generated. Therefore, the acoustic device 1 is suitable for use in public vehicles such as passenger aircraft and passenger trains.

In the above example, the case where the contact surface 24a is a flat surface has been described. However, if the contact surface 24a is a concave spherical surface having the most concave shape at the center, the vibrating body 23 is formed at the center of the contact surface 24a. Since it can be easily brought into contact, the stability of vibration transmission is further improved, and better listening performance is always obtained.
In the above example, the earplugs 21R and 21L provided with the columnar earplug body 22 have been described. However, the earplug body 22 may have a bullet shape (substantially columnar shape with a narrow end on the insertion side). Good.
Moreover, the form of the mounting body 11 is not limited to the form of FIG. An ear hook type as shown in FIG. 4 may be used. The wearing body 11 shown in FIG. 4 includes a headband portion 11A that straddles the user's occipital region, an ear hook portion (hook portion) 11B that extends in an arch shape so as to straddle the ears from the left and right ends of the headband portion 11A And an arm portion 11C that is rotatably connected to the front end of the hook portion 11B in the front-rear direction. The contact portions 24R and 24L are provided at the distal end portion of the arm portion 11C. (Feature 30)

1-2. Other examples 1-2-1. Configuration FIGS. 5 to 7 are diagrams showing another embodiment of the present invention.
The embodiment shown in FIGS. 5 to 7 has the following feature 28. 5 is a front view, FIG. 6 is an inner side view, and FIG. 7 is an outer side view.
Feature 28: The mounting body 11 includes a first ear hook 11-1 having a first contact portion 24R and a first acoustic vibration generation source 25R, a second contact portion 24L, and a second acoustic vibration generation source 25L. Second ear hook 11-2. The first ear hook 11-1 is attached to one of the user's ears (right ear). The second ear hook 11-2 is attached to the other ear (left ear) of the user.
1-2-2. Supplementary Explanation of Configuration Connection cords 55R and 55L are connected to the first ear hook body 11-1 and the second ear hook body 11-2, respectively. The configurations of the acoustic vibration generating sources 25R and 25L built in the contact portions 24R and 24L are the same as those shown in FIGS. A signal line 54 extending from one connection cord 55R is connected to both ends of the winding of the coil 52 of one acoustic vibration generating source 25R. A signal line 54 extending from the other connection cord 55L is connected to both ends of the coil 52 of the other acoustic vibration generating source 25L. Both connection cords 55R and 55L are bundled in the middle to form one connection cord, and a plug 56 is provided at the tip of the connection cord as in FIG.

1-3. Other examples 1-3-1. Configuration FIG. 8 is a diagram showing another embodiment of the present invention.
The embodiment shown in FIG. 8 has the following feature 8.
Feature 8: The first contact portion 24R and the second contact portion 24L are formed with a recess 24b that fits the vibrating body 23.
1-3-2. Supplementary Explanation of Configuration The recess 24b is formed by recessing the center of the contact surface 24a into a concave spherical shape.
1-3-3. Action When the vibrating body 23 is fitted into the recess 24b formed at the center of the contact surface 24a, the vibrating body 23 is kept in contact with the center of the contact surface 24a. Relative sliding between the vibrating body 23 and the contact surface 24a is prevented.
1-3-4. Effect Since the vibrating body 23 is kept in contact with the central portion of the contact surface 24a, and the relative sliding between the vibrating body 23 and the contact surface 24a is prevented, the vibration transmission stability is further improved, and the Good listening performance can be obtained.
In this example, the recess 24b is formed in the center of the contact surface 24a, but the recess 24b may be formed in addition to the center. Moreover, the recessed part 24b may be formed in several places of the contact surface 24a, and the vibrating body 23 may be made to fit in any one of the recessed parts 24b.

1-3. Other examples 1-3-1. Configuration FIG. 9 is a diagram showing another embodiment of the present invention.
The embodiment shown in FIG. 9A has the following feature 6.
Feature 6: The vibrating body 23 has a rod-like portion 23c inserted into the earplug body 22, and the rod-like portion 23c protrudes from the end surface 22b of the earplug body 22.
The acoustic devices shown in FIGS. 9B to 9F further have the following characteristic 6-2.
Characteristic 6-2: The opposite end 23b of the rod-shaped portion 23c is enlarged in diameter.

1-3-2. Supplementary Explanation of Configuration The vibrating body 23 of the earplug 21 shown in the embodiment of FIG. 9 protrudes farther from the earplug body 22 than the vibrating body 23 of the earplug 21 shown in FIG. The protruding length of the vibrator 23 from the end face 22b of the earplug 21 is 3 mm to 10 mm.
The surface shape of the distal end portion on the side opposite to the insertion side of the vibrating body 23 in FIG.
The shape of the enlarged diameter portion 26 of the vibrating body 23 in FIG. 9B is a hemispherical shape.
The shape of the enlarged diameter portion 26 of the vibrating body 23 in FIG. 9C is a sphere.
The shape of the enlarged diameter portion 26 of the vibrating body 23 in FIG. 9D is a columnar shape.
The shape of the enlarged diameter part 26 of the vibrating body 23 of FIG.9 (e) is cone shape.
The shape of the enlarged diameter portion 26 of the vibrating body 23 in FIG. 9F is a truncated cone shape.

1-3-3. Action Since the vibrating body 23 protrudes greatly from the earplug body 22, the contact portions 24 </ b> R and 24 </ b> L of the mounting body 11 can be brought into contact with the vibrating body 23 at a position further away from the earplug body 22. 1-3-4. 2. Effect It is possible to use in a state (posture) in which the contact portions 24R, 24L are separated from the user's external auditory canal H (R, L), compared to the case of the embodiment in FIG.

1-4. Other examples 1-4-1. Configuration The embodiment shown in FIGS. 10 to 14 has the following features 9, 25-2 and 30.
Feature 9: The first ear plug 21R has a fitting portion 27 that fits with the first contact portion 24R. The second earplug 21L has a fitting portion 27 that fits with the second contact portion 24L.
Feature 25-2: The ear plug body 22 has a flange portion 72 that is in close contact with the inner wall of the external auditory canal H (R, L) and closes the inner wall.
Feature 30: The wearing body 11 has an arc-shaped or substantially horseshoe-shaped headband portion straddling the back of the user when worn, and an arch so as to straddle the root of the user's auricle from the left and right ends of the headband portion 11A. It has the ear hook part (hook part) 11B extended in the shape, and the arm part 11C extended from the both ear hook part 11B to a user's ear hole. The contact portions 24R and 24L are provided at the distal end portion of the arm portion 11C.

1-4-2. Supplementary Explanation of Configuration The arm portion 11C is connected to the tip of the ear hook portion 11B so as to be rotatable in the front-rear direction.
A wireless communication unit 15 is provided at the center of the headband unit 11A. In the wireless communication unit 15, a receiving circuit that receives a wireless signal from an external device, a signal generating circuit that processes the received signal to generate an audio signal (electrical signal), and a battery that supplies power to them , Is provided.
The contact portions 24R and 24L are entirely made of plastic integrally with the arm portion 11C of the mounting body 11 from the side wall portion to the end plate portion (corresponding to the end plate portion 45 of the movable lid 42). .
The coils 52 of the acoustic vibration generating sources 25R and 25L are fixed to the inner surfaces of the end plates of the contact portions 24R and 24L.
The earplug 22 is an earplug member made of silicon rubber. The earplug body 22 is provided with three flange portions 72 having different diameters in stages. It has a so-called three-stage flange structure.
The earplugs 21R and 21L are attached to the ear canal H (R, L) by picking the fitting portion 27 (handle portion 73) with a finger and inserting it into the ear canal H (R, L). By insertion into the ear canal H (R, L), the flange portion 72 of the ear plug 22 is deformed following the inner wall of the ear canal H (R, L), and its outer peripheral surface is the inner surface of the ear canal H (R, L). In close contact with the entire circumference. By wearing the earplugs 21R and 21L, the inside of the wearer's external auditory canal H (R, L) is kept in a quiet environment that blocks noise from the outside, and water enters the external auditory canal H (R, L). Can be prevented.
Since the fitting part 27 is formed flexibly, the fitting with the contact parts 24R and 24L is gentle. Therefore, the connection state between the earplugs 21R, 21L and the mounting body 11 is easily released.

1-4-3. The acoustic device 1 generates a sound signal (electric signal) by receiving a signal wirelessly transmitted from an external device by a receiving circuit in the wireless communication unit 14 and processing the signal by a signal generating circuit. . This audio signal (electrical signal) is generated by the acoustic vibration generating source 2 in the left and right contact portions 24R, 24L.
Input to 5R and 25L. Both acoustic vibration generation sources 25R and 25L convert the input audio signal (electrical signal) into acoustic vibration. That is, the acoustic vibration generating sources 25R and 25L vibrate the end plates of the left and right contact portions 24R and 24L according to the input audio signals (electrical signals). When the end plate of the contact portion 24R on the right ear side vibrates, the vibration is transmitted to the earplug 21R attached to the right ear canal H (R), and the end plate of the contact portion 24L on the left ear side vibrates. Thus, vibration is transmitted to the earplug 21L attached to the left external auditory canal H (L). As the left and right earplugs 21R and 21L vibrate, sound (sound using air as a medium) is emitted from the insertion-side end surface 22a of each earplug 21R and 21L into the external auditory canal H (R, L) and becomes sound. Is transmitted to the eardrum. The vibrations of the earplugs 21R and 21L are transmitted to the auditory organ such as the eardrum using the skin of the external auditory canal H (R, L) as a medium. The ratio (sound volume ratio) of the sound using air as a medium and the sound using skin as a medium can be adjusted by appropriately selecting the material and dimensions of the earplugs 21R and 21L.
When the earplugs 21R, 21L and the contact parts 24R, 24L of the wearing body 11 are not in contact with each other, no vibration is generated in the earplugs 21R, 21L, and the end plates of the contact parts 24R, 24L vibrate. Only.

1-4-4. Effect Since the contact parts 24R and 24L are fitted to the ear plug body 22, the vibration transmission efficiency from the contact parts 24R and 24L to the ear plugs 21R and 21L can be increased.
The earplugs 21R, 21L and the mounting body 11 are completely separate from each other, and the earplugs 21R, 21L and the contact portions 24R, 24L are loosely connected to each other. Even when the wearing body 11 is detached from the head, it is safe because the earplugs 21R, 21L do not come off from the ear canal H (R, L). That is, the earplugs 21R, 21L attached to the external auditory canal H (R, L) continue to exhibit their original functions (sound insulation function, waterproof function) even when the attachment body 11 is removed. Therefore, this acoustic device 1 can be used also in swimming and surfing.

1-5. Other Examples 1-5-1. Structure The embodiment shown in FIGS. 15 to 21 has the following feature 9-2.
Feature 9-2: The first contact portion 24R swells in a spherical belt shape. The fitting portion 27 of the first earplug 21R is formed in a spherical shape so that the first contact portion 24R can be inserted and removed and can be in close contact therewith. The second contact portion 24L swells in a spherical band shape. The fitting portion 27 of the second ear plug 21L is formed in a spherical shape so that the second contact portion 24L is removably received and can be brought into close contact therewith.

1-5-2. Supplementary Explanation of Configuration The acoustic device 1 of FIG. 15 is an ear hook type (feature 30). A wireless communication unit 15 is provided at the center of the headband unit 11A as in FIG. The contact portions 24R and 24L, including the side wall portion (spherical portion) and the end plate portion, are entirely formed of plastic integrally with the arm portion 11C of the mounting body 11.
Ear plugs 22 of the ear plugs 21R and 21L shown in FIG. 16 are silicon rubber ear plug members. The earplug body 22 is provided with three flange portions 72 having different diameters in stages. It has a so-called three-stage flange structure. The earplugs 21R and 21L are attached to the ear canal H (R, L) by picking the fitting portion 27 (handle portion 73) with a finger and inserting it into the ear canal H (R, L).
In the contact portions 24R and 24L (vibration source accommodation chambers) in FIG. 18, moving coil type speakers are provided as the acoustic vibration generation sources 25R and 25L. That is, the acoustic vibration generating sources 25R and 25L in this example include a magnet 55, a moving coil 56 provided concentrically around the magnet 55, and a vibration film 57 to which the moving coil 56 is fixed. . The magnet 55 is fixed to the center of the bottom of the bottomed cylindrical holding member 57, and is fixed to the side walls of the contact portions 24R and 24L via the holding member 57. The vibration film 57 is provided so as to close the opening of the holding member 57.
In the contact portions 24R and 24L in FIG. 18A, the thickness of the end plate portion is smaller than that of the side wall portion. The end plate portion and the moving coil 56 are not in contact with each other.
In the contact portions 24R and 24L in FIG. 18B, the thickness of the central portion of the inner surface of the end plate portion is large, and the central portion of the vibration film 57 is in light contact with the portion.
19A and 19B, piezoelectric type acoustic vibration generating elements 80 are provided as acoustic vibration generating sources 25R and 25L in the contact portions 24R and 24L (vibration source accommodation chambers). The acoustic vibration generating element 80 includes a disk-shaped piezoelectric element 81 and electrodes (not shown) formed on both surfaces of the piezoelectric element 81. The piezoelectric element 81 is a known piezoelectric element formed of a compound of lead (Pb), zirconium (Zr), titanium (Ti) and oxygen. A signal line 54 (see FIG. 3) is connected to the electrode.
In FIG. 19A, an annular holding member 82 is fixed to the outside of the piezoelectric element 81. The piezoelectric element 81 is held on the side walls of the contact portions 24R and 24L via the holding member 82. A rod-shaped vibration transmission body 83A is fixed vertically at the center of one side of the piezoelectric element 81. The tip (non-fixed end) of the vibration transmitting body 83A is in perpendicular contact with the inner surfaces of the end plate portions 24B of the contact portions 24R and 24L.
In FIG. 19B, the piezoelectric element 61 is held by the end plate portions 24B of the contact portions 24R and 24L via the rod-shaped vibration transmitting body 83B. One end of the vibration transmitting body 83B is fixed vertically to the center of the piezoelectric element 81, and the other end is fixed vertically to the center of the inner surface of the end plate portion 24B of the contact portions 24R and 24L. An annular weight 84 made of metal (for example, iron or brass) is fixed to the outside of the piezoelectric element 81.
The earplugs 22 of the earplugs 21R and 21L shown in FIGS. 20 and 21 are foamed polyurethane earplugs formed in a columnar shape. The earplugs 21R and 21L are attached to the ear canal H (R, L) by inserting the earplug body 22 with a finger and crushing the earplug body 22 into the ear canal H (R, L). The earplug 22 inserted into the external auditory canal H (R, L) attempts to return to its original state (free state) due to its self-restoring property. In the process, the outer peripheral surface of the ear plug 22 is in close contact with the inner surface of the external auditory canal H (R, L) over the entire periphery.
The fitting portions 27 of the earplugs 21R and 21L shown in FIG. 20 are even connected to the end face of the earplug 22 opposite to the insertion side.
The fitting part 27 of the earplugs 21R and 21L shown in FIG. 21 has a part (about half of the depth direction) recessed the end part of the main body (columnar part) of the earplug body 22. Is formed.

1-5-3. Action / Effect In FIG. 18, the vibration film 57 vibrates to generate air transmission sound, and the acoustic vibration is transmitted to the end plate portions 24B of the contact portions 24R and 24L. In the example of FIG. 18A, since the vibration film 57 is not in contact with the end plate portion 24B, the air transmission sound is exclusively transmitted directly to the end plate portion 24B. In the example of FIG. 18B, since the vibration film 57 is in contact with the inner surface of the end plate portion 24B, the vibration of the vibration film 57 is directly transmitted to the end plate portion 24B in addition to the air transmission sound.

The piezoelectric element 81 of the acoustic vibration generating element 80 shown in FIG. 19 vibrates in the thickness direction by applying an AC voltage between both electrodes via the signal line 54. In FIG. 19A, since the peripheral portion of the piezoelectric element 81 is held by the side walls of the contact portions 24R and 24L, the central portion vibrates with the maximum amplitude. Due to the vibration of the piezoelectric element 81, the vibration transmitting body 83A vibrates in the axial direction (slightly reciprocates) and strikes the end plate portions 24B of the contact portions 24R and 24L. Due to the impact, acoustic vibration is transmitted to the end plate portions 24B of the contact portions 24R and 24L. In FIG. 19B, since the central portion of the piezoelectric element 81 is held by the end plate portions 24B of the contact portions 24R and 24L, the outer peripheral portion tends to vibrate with the maximum amplitude. Since the weight 84 is fixed to the outer peripheral portion of the piezoelectric element 81, the inertial force of the weight 84 acts on the vibration transmitting body 83 </ b> B via the piezoelectric element 81. Due to the impact, acoustic vibration is transmitted to the end plate portions 24B of the contact portions 24R and 24L.

According to the configuration of FIG. 19, the vibration impact caused by the vibration transmitting body 83A hitting the end plate portion 24B of the contact portions 24R, 24L is transmitted as acoustic vibration from the end plate portion 24B to the vibrating body 23 of the earplugs 21R, 21L. And transmitted to the earplug 22. By increasing the impact force by the vibration transmitting body 83A, it is possible to give a strong vibration impact to the ear plug body 22, so that not only the airway sound but also the skin constituting the inner wall of the external auditory canal H (R, L) and its back The intensity of acoustic vibration (solid conduction sound) transmitted to the auditory organ using a bone or the like as a medium can be effectively increased. This configuration is suitable for an acoustic device for a hearing impaired person.

2. Second embodiment example 2-1-1. Configuration FIG. 22, FIG. 23 and FIG. 24 are diagrams showing examples of the acoustic device according to the present invention.
The acoustic device 2 shown in FIGS. 22, 23 and 24 has the following features 1 to 5, 6-2, 6-3, 6-4, 7, 27, and 29.
Characteristic 1: It has the mounting body 12 detachably mounted on the user's head or ear.
Characteristic 4-2: The wearing body 12 includes a first contact portion 24R that comes into contact with the earplug 30 attached to the external ear canal H (R) of one (right ear) of the user, and the other external ear canal H of the user. And a second contact portion 24L that contacts the earplug 30 attached to (L).
Feature 5: The mounting body 12 includes a first acoustic vibration generation source 25R that vibrates the first contact portion 24R and a second acoustic vibration generation source 25L that vibrates the second contact portion 24L.
Feature 10: The first contact portion 24R and the second contact portion 25R have a protrusion 31 having a smaller diameter than the earplug 30. The protruding end portion 31 a of the protruding portion 31 contacts the end surface (hereinafter also referred to as the non-insertion side end surface) 30 b of the earplug 30 exposed from the external auditory canal H (L, R).
Feature 10-2: The protrusion 31 protrudes in a bar shape.
Characteristic 27: The mounting body 12 has a watertight structure in which the inside is isolated from the outside.
Feature 29: The wearing body 12 has an elastic body portion 29 having an arc shape or a substantially horseshoe shape that straddles the user's head when wearing. When the mounting body 11 is mounted, the first contact portion 24R and the second contact portion 24L are urged toward each other by the elastic force of the elastic body portion 29.

2-1-2. Supplementary Explanation of Configuration As shown in FIG. 22, the mounting body 12 includes an arc-shaped portion (arch portion) 12a straddling the left and right of the user's head, and slightly inward from the left and right ends of the arc-shaped portion 12a. Portions (arm portions) 12R and 12L extending in a straight line. The distal ends of both arm portions 12R and 12L are bent inwardly in an L shape. A first contact portion 24R is provided at the tip of the bent portion of the right arm portion 12R, and a second contact portion 24L is provided at the tip of the bent portion of the left arm portion 12L. The mounting body 12 is a plastic molded product. The mounting body 12 can be mounted so as to straddle the user's back head or jaw.

As shown in FIG. 24, the first contact portion 24R and the second contact portion 24L are composed of a cylindrical wall 41 integrally formed with the arm portion 12R, and a disc-shaped movable lid attached to the front end opening of the cylindrical wall 41. 42, and a seal body 43 that seals the space between the cylindrical wall 41 and the movable lid 42 in a watertight state.

In the first contact portion 24R and the second contact portion 24L, a vibration source accommodation chamber surrounded by the cylindrical wall 41 and the movable lid 42 is formed. The cylindrical wall 41 is formed by expanding the distal end portion of the arm portion 12R. A fitting portion 44 having a diameter reduced by about half the thickness of the cylindrical wall 41 is formed at the opening edge of the cylindrical wall 41. The movable lid 42 includes an end plate portion 45 having the same diameter as the outer diameter of the cylindrical wall 41, and a cylindrical fitting portion 46 formed on one side so as to border the end plate portion 45. Yes. The fitting portion 46 of the movable lid 42 is loosely fitted (fitted with some play) on the outside of the fitting portion 44 of the cylindrical wall 41.

The movable lid 42 has a substantially cylindrical protrusion 31 protruding outward. The protrusion 31 protrudes perpendicularly to the plate surface at the center of the end plate 45. The tip 31a of the protrusion 31 is pointed conically.

The seal body 43 is a rubber member formed in a cylindrical shape. The inner surface of the seal body 43 is in close contact with the outer side of the movable lid 42 and the cylindrical wall 41 due to its rubber elasticity. An annular protrusion 43 a is formed inside the seal body 43. The annular protrusion 43 a is interposed between the end surface of the fitting portion 46 of the movable lid 42 and the step portion of the fitting portion 44 of the cylindrical wall 41. An annular engagement portion 43 b that engages with the peripheral edge of the front surface of the end plate portion 45 of the movable lid 42 is formed at one end edge portion of the seal body 43. An annular engaging portion 43 c that engages with the peripheral edge of the rear end portion of the cylindrical wall 41 is formed on the other end edge portion of the seal body 43. In the movable lid 42, the inner surface of the cylindrical portion of the seal body 43 is in close contact with the outer surface of the movable lid 42 and the cylindrical wall 41, and both engaging portions 43 b and 43 c are engaged with both ends of the movable lid 42 and the cylindrical wall 41. Thus, the tip end of the cylindrical wall 41 is elastically held. The movable lid 42 can be moved back and forth (in the thickness direction of the end plate portion 45) with respect to the cylindrical wall 41, but the movable range (maximum displacement amount) is a very small range due to the elastic force of the seal body 43. Is limited to.

The first acoustic vibration source 25R and the second acoustic vibration source 25L are electrodynamic electroacoustic transducers having a magnet 51 and a coil 52. The magnet 51 is held at the center of the cylindrical wall 41 via a holding member 53. The coil 52 is concentrically provided with a gap on the outside of the magnet 51. The coil 52 is fixed to the inner surface of the end plate portion 45 of the movable lid 42. The coil 52 is provided concentrically with the protrusion 31. A signal line 54 extending from the connection cord 55 (FIG. 22) is connected to both ends of the winding of the coil 52. A plug 56 connected to a stereo audio signal output terminal of an external device serving as an audio signal generation source is provided at the tip of the connection cord 55.

The first acoustic vibration generation source 25R and the second acoustic vibration generation source 25L convert an audio signal (electric signal) transmitted from an external device (not shown) through the signal line 54 into acoustic vibration. That is, an audio signal (electrical signal) is input to the coil 52, and the movable lid 42 is vibrated together with the coil 52 by moving the coil 52 by the interaction between the current in the coil 52 and the magnetic field of the magnet 51. When the output signal from the external device is a stereo audio signal, different audio signals (electric signals) are input to the first acoustic vibration generation source 25R and the second acoustic vibration generation source 25L, respectively. Then, both the movable lids 42 of the first contact portion 24R and the second contact portion 24L vibrate with different acoustic vibrations.

The ear plug 30 is a foamed polyurethane ear plug formed in a cylindrical shape. The earplug 30 is a commercially available product. As the earplug 30, an Ear Whisper manufactured by Aero Co., Ltd. can be exemplified.

The earplug 30 is attached to the ear canal H (R, L) by inserting the earplug 30 into the ear canal H (R, L) in a state in which the earplug 30 is picked with a finger and crushed. The earplug 30 inserted into the external auditory canal H (R, L) attempts to return to its original state (free state) due to its self-restoring property. In the process, the outer peripheral surface of the earplug 30 is in close contact with the inner surface of the ear canal H (R, L) over the entire periphery. By wearing the earplug 30, it is possible to keep the inside of the ear canal H (R, L) of the wearer in a quiet environment in which noise from the outside is blocked. The earplug 30 also has a waterproof function that can be used during swimming.

2-1-3. Operation The acoustic device 2 is configured such that the protrusion 31 of the first contact portion 24R is connected to one earplug in a state where the earplug 30 is mounted on both (left and right) ear canals H (R) and H (L) of the user. 30, the protrusion 31 of the second contact portion 24L is used in contact with the other earplug 30. Since the hard projection 31 having a smaller diameter than the earplug 30 is in contact with the end surface 30b of the earplug 30 having elasticity, the tip of the projection 31 is slightly recessed into the end surface 30b of the earplug 30. It will be in the engaged state. The contact pressure of the protrusion 31 with respect to the earplug 30 can be adjusted by appropriately selecting the rigidity (elasticity) of the arch portion 12a of the mounting body 12.

When the plug 56 of the connection cord 55 is connected to the stereo audio signal output terminal of the external device and an audio signal (electric signal) is output from the external device, the audio signal (electric signal) passes through the signal line 54 and the left and right contact portions 24R. , 24L are input to acoustic vibration generating sources 25R, 25L. Both acoustic vibration generation sources 25R and 25L convert the input audio signal (electrical signal) into acoustic vibration. That is, the acoustic vibration generating sources 25R and 25L vibrate the movable lids 42 of the left and right contact portions 24R and 24L, respectively, according to the input audio signal (electrical signal). When the movable lid 42 of the right ear side contact portion 24R vibrates, the vibration is transmitted to the earplug 30 attached to the right ear canal H (R), and the movable lid 42 of the left ear side contact portion 24L vibrates. As a result, vibration is transmitted to the earplug 30 attached to the left external auditory canal H (L). When the earplug 30 vibrates, sound (sound using air as a medium) is emitted from the insertion-side end surface 30a of the earplug 30 into the ear canal H (R, L), and is transmitted to the eardrum as sound. Further, the vibration of the earplug 30 is transmitted to the auditory organ such as the eardrum through the skin of the external auditory canal H (R, L) as a medium. The ratio (sound volume ratio) of the sound using air as a medium and the sound using skin or the like as a medium can be adjusted by appropriately selecting the material and dimensions of the earplug 30.
When the earplug 30 and the contact portions 24R and 24L of the wearing body 11 are not in contact with each other, the earplug 30 is not vibrated at all, and the movable lid 42 of the contact portions 24R and 24L and the protrusion 31 thereof are provided. It only vibrates.

2-1-4. Effect The acoustic device 2 has protrusions of the left and right contact portions 24R and 24L of the mounting body 12 on the end surface 30b on the side opposite to the insertion side of the earplug 30 with the earplugs 30 mounted on the left and right external auditory canals H (R, L). Since it is configured to be used in a state in which the portion 31 is in contact, even if the contact portions 24R and 24L are inclined with respect to the end surface 30b on the side opposite to the insertion side of the earplug 30, the conventional contact is achieved. The vibration of the contact portions 24R and 24L is transmitted to the earplug 30 with high efficiency without being in a defective state (surface contact failure). Therefore, the acoustic device 1 can always exhibit good listening performance.

This acoustic device 2 listens to sound by applying vibration to the earplug 30 while keeping the user's external ear canal H (R, L) in a quiet environment with the outside noise blocked by the earplug 30. be able to. Therefore, the acoustic device 1 can exhibit extremely high listening performance even under high noise.

Since the mounting body 12 has a watertight structure, the acoustic device 2 can be used even in an environment where it gets wet if the connection portion with the external device is made waterproof. Since the earplug 30 and the mounting body 12 are completely separate from each other, even when the mounting body 12 is detached from the head during the use of the acoustic device 2, the earplug 30 is caused by the external ear canal H. It is safe because it does not deviate from (R, L). That is, the earplug 30 attached to the external auditory canal H (R, L) continues to exhibit its original functions (sound insulation function, waterproof function) even when the attachment body 12 is removed. Therefore, this acoustic device 1 can be used also in swimming and surfing.

When the mounting body 12 is not mounted, that is, when the earplug 30 and the contact portions 24R and 24L of the mounting body 12 are not in contact with each other, the acoustic device 2 does not generate any vibration in the earplug 30. Only the movable lid 42 of the contact portions 24R and 24L and the projection 31 thereof vibrate. Even when the wearing body 12 is detached during use, a sound having a loud volume that causes discomfort to surrounding people is not generated. Therefore, this acoustic device 2 is suitable for use in public vehicles such as passenger aircraft and passenger trains.

In the above example, the case where the columnar earplug 30 is used has been described. However, the shape of the earplug 30 may be a bullet shape (substantially columnar shape with a thin end on the insertion side).
In the above example, the tip 31a of the protrusion 31 is pointed in a conical shape.
The tip 31a may have a convex spherical shape (FIG. 25).

2-2. Other examples 2-2-1. Configuration FIG. 26 is a diagram showing another example of the acoustic device according to the present invention.
The acoustic device of FIG. 26 has the following feature 10-3.
Feature 10-3: The protrusion 31 has an enlarged diameter portion 33 at the tip.
2-2-3. Supplementary Explanation of Configuration The shape of the enlarged-diameter portion 33 of the protrusion 31 in FIG. 26A is a hemispherical shape.
The shape of the enlarged diameter portion 33 of the protrusion 31 in FIG. 26B is a sphere.
The diameter-expanded portion 33 shape of the protrusion 31 in FIG. 26 (c) is a conical shape.

2-3. Other examples 2-3-1. Configuration FIG. 27 is a diagram showing another embodiment of the present invention.
The example of FIG. 27A has the following features 3 and 11.
Feature 3: The ear plug 30 includes an ear plug body 34 and a vibrating body 35 that is inserted and held concentrically with the ear plug body 34. One end portion 35 a of the vibrating body 35 is buried in the ear plug body 34. The other end 35 b of the vibrating body 35 protrudes from the end surface 34 b of the ear plug 34 that is exposed from the external auditory canal H (R, L).
Characteristic 11: The vibrating body 35 includes a rod-like portion 36 that is completely buried in the ear plug 34, and a plate-like portion 37 that is formed in a flange shape at the exposed end of the rod-like portion 36. Have. The protrusions 31 of the contact portions 24R and 24L are in contact with the plate surface 37a of the plate-like portion 37.
The embodiment of FIG. 27B further has the following feature 11-2.
Feature 11-2: The plate surface 37a of the plate-like portion 37 is a partially concave spherical surface.

2-3-2. Supplementary Explanation of Configuration The ear plug body 34 is a foamed polyurethane member formed in a columnar shape. A cylindrical hole 37c is formed at the center of the ear plug body 34, extending from one end surface (counter-insertion-side end surface) 34b to the vicinity of the other end surface (insertion-side end surface) 34a. And the rod-shaped part 36 of the vibrating body 35 is closely inserted in this hole 37c. The insertion side end 36a of the rod-shaped portion 36 is in contact with the bottom of the hole 37c. The vibrating body 35 is a member made of metal (brass, iron, gold, platinum, etc.) or plastic.

2-3-3. Action / Effect The vibration of the movable lid 42 is transmitted to the vibrating body 35 by bringing the protruding portion 31 of the movable lid 42 made of a hard material into contact with the vibrating body 35 made of a hard material. The vibration transmission efficiency between the soft material and the soft material or between the soft material and the hard material is significantly higher. The protrusion 31 of the movable lid 42 does not need to be in strong pressure contact with the vibrating body 35, and may be in contact with it. The contact pressure between them can be adjusted by appropriately selecting the rigidity (elasticity) of the arch portion 12a of the mounting body 12.

2-4. Other examples 2-4-1. Configuration FIG. 28 is a diagram showing another embodiment of the present invention.
The embodiment shown in FIG. 28 has the following feature 28.
Feature 28: The mounting body 12 includes a first ear hook 12-1 having a first contact portion 24R and a first acoustic vibration generation source 25R, a second contact portion 24L, and a second acoustic vibration generation source 25L. A second ear hook 12-2. The first ear hook 12-1 is attached to one of the user's ears (right ear). The second ear hook 12-2 is attached to the other ear (left ear) of the user.

1-2-2. Supplementary Explanation of Configuration Connection cords 55R and 55L are connected to the first ear hooking body 12-1 and the second ear hooking body 12-2, respectively. The configurations of the acoustic vibration generating sources 25R and 25L built in the contact portions 24R and 24L are the same as those shown in FIGS. A signal line 54 extending from one connection cord 55R is connected to both ends of the winding of the coil 52 of one acoustic vibration generating source 25R. A signal line 54 extending from the other connection cord 55L is connected to both ends of the coil 52 of the other acoustic vibration generating source 25L. Both connection cords 55R and 55L are bundled in the middle to form a single connection cord, and a plug 56 is provided at the tip thereof as in FIG.

3. Third Embodiment 3-1-1. Configuration FIG. 29, FIG. 30 and FIG. 31 are diagrams showing examples of the acoustic apparatus according to the present invention.
The acoustic device 3 shown in FIGS. 29, 30, and 31 has the following features 1, 5, 12, 13, 6-3, 6-4, 7, 27, and 29.
Feature 1: It has the mounting body 13 which is detachably mounted on the user's head or ear.
Characteristic 12: The wearing body 13 is inserted (press-fitted) in an airtight manner so that it can be inserted into and removed from a connection hole 71 formed in the earplug 70 attached to the external ear canal H (R) of one of the users (right ear) Inserted into the first contact portion 24R having the rod-shaped protrusion 61 and the connection hole 71 formed in the earplug 70 attached to the other external ear canal H (L) of the user so as to be insertable / removable (press-fit) ) And a second contact portion 24L having a rod-like protrusion 61.
Feature 5: The mounting body 13 includes a first acoustic vibration generation source 25R that vibrates the first contact portion 24R and a second acoustic vibration generation source 25L that vibrates the second contact portion 24L.
Feature 13: The ear plug 70 is in close contact with the inner wall of the external ear canal H (R, L) and closes the inner wall, and extends from the center of the flange 72 to the outside of the external ear canal H (R, L). And a handle portion 73 to be operated.
Characteristic 13-2: The connection hole 71 is open to the end surface 73a of the handle portion 73.
Feature 13-3: The shape of the flange portion 72 is an umbrella shape (parabolic shape).
Characteristic 27: The mounting body 13 has a watertight structure in which the inside is isolated from the outside.
Feature 29: The wearing body 13 has an arcuate or substantially horseshoe-shaped elastic body portion 29 that straddles the user's head when worn. When the mounting body 13 is mounted, the first contact portion 24R and the second contact portion 24L are biased toward each other by the elastic force of the elastic body portion 29.

3-1-2. Supplementary Explanation of Configuration As shown in FIG. 29, the mounting body 13 includes an arc-shaped portion (arch portion) 13a straddling the left and right of the user's head and slightly inward from the left and right ends of the arc-shaped portion 13a. It has the part (arm part) 13R and 13L extended linearly. The distal ends of both arm portions 13R and 13L are bent inwardly in an L shape. A first contact portion 24R is provided at the tip of the bent portion of the right arm portion 13R, and a second contact portion 24L is provided at the tip of the bent portion of the left arm portion 13L. The mounting body 13 is a plastic molded product. The mounting body 13 can be mounted so as to straddle the user's back head or jaw. A wireless communication unit 15 is provided at the center of the arch portion 13a. In the wireless communication unit 15, a receiving circuit that receives a wireless signal from an external device, a signal generating circuit that processes the received signal to generate an audio signal (electrical signal), and a battery that supplies power to them , Is provided.

As shown in FIG. 31, the first contact portion 24R and the second contact portion 24L include a cylindrical wall 41 integrally formed with the arm portion 13R, and a disc-shaped movable lid attached to the tip opening of the cylindrical wall 41. 42, and a seal body 43 that seals the space between the cylindrical wall 41 and the movable lid 42 in a watertight state.

In the first contact portion 24R and the second contact portion 24L, a vibration source accommodation chamber surrounded by the cylindrical wall 41 and the movable lid 42 is formed. The cylindrical wall 41 is formed by expanding the distal end portion of the arm portion 12R. A fitting portion 44 having a diameter reduced by about half the thickness of the cylindrical wall 41 is formed at the opening edge of the cylindrical wall 41. The movable lid 42 has an end plate portion 45 having the same diameter as the outer diameter of the cylindrical wall 41, and a cylindrical fitting portion 46 formed on one side so as to border the end plate portion 45. Yes. The fitting portion 46 of the movable lid 42 is loosely fitted (fitted with some play) on the outside of the fitting portion 44 of the cylindrical wall 41.

The movable lid 42 has a substantially columnar protrusion 61 protruding outward. The protrusion 61 protrudes perpendicularly to the plate surface at the center of the end plate 45. The tip 61a of the protrusion 61 has a convex spherical shape.

The seal body 43 is a rubber member formed in a cylindrical shape. The inner surface of the seal body 43 is in close contact with the outer side of the movable lid 42 and the cylindrical wall 41 due to its rubber elasticity. An annular protrusion 43 a is formed inside the seal body 43. The annular protrusion 43 a is interposed between the end surface of the fitting portion 46 of the movable lid 42 and the step portion of the fitting portion 44 of the cylindrical wall 41. An annular engagement portion 43 b that engages with the front peripheral edge portion of the end plate portion 45 of the movable lid 42 is formed at one end edge portion of the seal body 43. An annular engaging portion 43 c that engages with the peripheral edge of the rear end portion of the cylindrical wall 41 is formed on the other end edge portion of the seal body 43. In the movable lid 42, the inner surface of the cylindrical portion of the seal body 43 is in close contact with the outer surface of the movable lid 42 and the cylindrical wall 41, and both engaging portions 43 b and 43 c are engaged with both ends of the movable lid 42 and the cylindrical wall 41. Thus, the tip end of the cylindrical wall 41 is elastically held. The movable lid 42 can be moved back and forth (in the thickness direction of the end plate portion 45) with respect to the cylindrical wall 41, but the movable range (maximum displacement amount) is a very small range due to the elastic force of the seal body 43. Is limited to.

The first acoustic vibration source 25R and the second acoustic vibration source 25L are electrodynamic electroacoustic transducers having a magnet 51 and a coil 52. The magnet 51 is held at the center of the cylindrical wall 41 via a holding member 53. The coil 52 is concentrically provided with a gap on the outside of the magnet 51. The coil 52 is fixed to the inner surface of the end plate portion 45 of the movable lid 42. The coil 52 is provided concentrically with the protrusion 61. A signal line 54 extending from a signal generation circuit in the wireless communication unit 15 is connected to both ends of the winding of the coil 52.

The first acoustic vibration generation source 25R and the second acoustic vibration generation source 25L convert an audio signal (electric signal) transmitted from the signal generation circuit in the wireless communication unit 15 via the signal line 54 into acoustic vibration. That is, an audio signal (electrical signal) is input to the coil 52, and the movable lid 42 is vibrated together with the coil 52 by moving the coil 52 by the interaction between the current in the coil 52 and the magnetic field of the magnet 51. When the signal from the external device is a stereo audio signal, different audio signals (electrical signals) are input to the first acoustic vibration generation source 25R and the second acoustic vibration generation source 25L, respectively. Then, both the movable lids 42 of the first contact portion 24R and the second contact portion 24L vibrate with different acoustic vibrations.

The earplug 70 is an earplug made of silicon rubber. The earplug 70 is provided with three flange portions 72 having different diameters in stages. It is a waterproof earplug with a so-called three-stage flange structure. This type of ear plug 70 is commercially available. An example of this type of earplug 70 is a swim & shower (trade name) manufactured by Aero.

The earplug 70 is attached to the ear canal H (R, L) by picking the handle portion 73 with a finger and inserting it into the ear canal H (R, L). By insertion into the ear canal H (R, L), the flange portion 72 is deformed following the inner wall of the ear canal H (R, L), and the outer peripheral surface of the outer ear canal extends over the inner surface of the ear canal H (R, L). And adhere closely. Wearing the earplug 70 keeps the wearer's external auditory canal H (R, L) in a quiet environment that blocks external noise and prevents water from entering the external auditory canal H (R, L). can do.

3-1-3. Operation The acoustic device 3 is configured so that the protrusion 61 of the first contact portion 24R is connected to one earplug in a state where the earplug 70 is mounted on both (left and right) ear canals H (R) and H (L) of the user. The projection 61 of the second contact portion 24L is inserted into the connection hole 71 of the other ear plug 70 and used in the connection hole 71 of 70, respectively.

In the acoustic device 3, a signal transmitted wirelessly from an external device is received by a reception circuit in the wireless communication unit 15, and the signal generation circuit processes the signal to generate an audio signal (electric signal). This audio signal (electrical signal) is input to the acoustic vibration generating sources 25R and 25L in the left and right contact portions 24R and 24L through the signal line 54. Both acoustic vibration generation sources 25R and 25L convert the input audio signal (electrical signal) into acoustic vibration. That is, the acoustic vibration generating sources 25R and 25L vibrate the movable lids 42 of the left and right contact portions 24R and 24L, respectively, according to the input audio signal (electrical signal). When the movable lid 42 of the right ear side contact portion 24R vibrates, the vibration is transmitted to the earplug 70 attached to the right ear canal H (R), and the movable lid 42 of the left ear side contact portion 24L vibrates. As a result, vibration is transmitted to the earplug 70 attached to the left external auditory canal H (L). When the earplug 70 vibrates, sound (sound using air as a medium) is emitted from the insertion-side end surface 70a of the earplug 70 into the external ear canal H (R, L), and is transmitted to the eardrum as sound. The vibration of the ear plug 70 is transmitted to the auditory organ such as the eardrum using the skin of the external auditory canal H (R, L) as a medium. The ratio (sound volume ratio) of the sound using air as a medium and the sound using skin as a medium can be adjusted by appropriately selecting the material and dimensions of the earplug 70.
When the earplug 70 and the contact portions 24R and 24L of the mounting body 13 are not in contact with each other, no vibration is generated in the earplug 70, and the movable lid 42 and the protrusion 61 of the contact portions 24R and 24L are provided. It only vibrates.

3-1-4. Effect Since the acoustic device 3 is configured to be used in a state in which the protruding portions 61 of the contact portions 24R and 24L are inserted (press-fitted) into the connection holes 71 formed in the handle portion 73 of the earplug 70, the ear device 70 Even if the contact portions 24R and 24L are inclined with respect to the end surface 72b of the flange portion 72 responsible for the sound insulation performance and waterproof performance of the plug 70, the conventional contact failure (surface contact failure) does not occur. The vibrations of the contact portions 24R and 24L are transmitted to the earplug 70 with high efficiency. Therefore, the acoustic device 3 can always exhibit good listening performance.

The sound device 3 listens to sound by applying vibration to the earplug 70 while keeping the inside of the user's external auditory canal H (R, L) in a quiet environment with external noise blocked by the earplug 70. be able to. Therefore, the acoustic device 3 can exhibit extremely high listening performance even under high noise.

This acoustic device 3 is suitable for use in an environment where it gets wet because the entire mounting body 13 having a wireless reception function has a watertight structure. Since the earplug 70 can be a commercially available earplug that is guaranteed to be waterproof, it is safe.

In the above example, the acoustic device 3 attaches the ear plug 70 to the user's both external ear canals H (R) and H (L), and then attaches the protrusions 61 of both the contact portions 24R and 24L to the respective ear plugs 70. Although it has been described that it is inserted into the connecting hole 71 and used, the earplug 70 may be used in a state where it is attached to both the contact portions 24R and 24L in advance.
In the above example, a commercially available earplug is used as the earplug 70, but it is needless to say that a dedicated earplug more suitable for use of the acoustic device 3 may be used.

3-2. Other examples 3-2-1. Configuration FIG. 32 is a diagram showing another example of the acoustic device according to the present invention.
The embodiment shown in FIG. 32 has the following features 14 and 14-2.
Characteristic 14: The ear plug 70 has a fitting portion 74 that fits with each of the contact portions 24R and 24L.
Feature 14-2: The contact portions 24R and 24L bulge into a spherical belt shape. The fitting part 74 is formed in a spherical band shape so that the contact parts 24R and 24L can be inserted and removed so as to be in close contact therewith.

3-2-2. Supplementary Explanation of Configuration The contact portions 24R and 24L shown in FIG. 32 are arranged until the end plate portion 24B (corresponding to the end plate portion 45 of the movable lid 42) reaches from the side wall portion (portion swelled in a spherical band shape). The entirety is formed of plastic integrally with the arm portions 13R and 13L of the mounting body 13. In the contact portions 24R, 24L (vibration source accommodation chambers), moving coil type speakers are provided as the acoustic vibration generation sources 25R, 25L. That is, the acoustic vibration generating sources 25R and 25L in this example include a magnet 55, a moving coil 56 provided concentrically around the magnet 55, and a vibration film 57 to which the moving coil 56 is fixed. . The magnet 55 is fixed to the center of the bottom of the bottomed cylindrical holding member 57, and is fixed to the side walls of the contact portions 24R and 24L via the holding member 57. The vibration film 57 is provided so as to close the opening of the holding member 57.
A projecting portion 62 is provided at the center of the end plate portions of the contact portions 24R and 24L in FIG. The inside of the protrusion 62 is hollow and communicates with the vibration source accommodation chamber.
A protrusion 63 is provided at the center of the end plate portion 24B of the contact portion 24R, 24L in FIG. This protrusion 63 has a solid structure. On the other hand, the thickness of the central portion of the inner surface of the end plate portion 24B of the contact portions 24R and 24L is large, and the central portion of the moving coil 56 is in light contact with that portion.
FIG. 32C shows a state in which the ear plug 70 and the contact portions 24R and 24L are connected to each other. As shown in FIG. 32 (c), in the connected state, the side walls of the contact parts 24 R and 24 L are gently fitted into the fitting part 74 of the earplug 70, and the protrusions 62 and 63 are connected to the connection hole 75. Has been inserted. The fitting part 74 is flexible. The fitting of the protrusions 62 and 63 with the connecting hole 75 is gentle. Therefore, this connected state is easily released.

3-2-3. The earplug 70 and the mounting body 13 are completely separate from each other, and the earplug 70 and the contact portions 24R and 24L are loosely connected to each other. Even if 13 is removed from the head, it is safe because the earplug 70 does not come off from the external auditory canal H (R, L). That is, the earplug 70 attached to the external auditory canal H (R, L) continues to exhibit its original functions (sound insulation function, waterproof function) even when the attachment body 13 is removed. Therefore, this acoustic device 3 can also be used during swimming and surfing.

3-3. Other examples 3-3-1. Configuration FIG. 33 is a diagram showing another example of the acoustic device according to the present invention.
The embodiment shown in FIG. 33 has the following features 14 and 14-2.
Characteristic 14: The ear plug 70 has a fitting portion 74 that fits with each of the contact portions 24R and 24L.
Feature 14-2: The contact portions 24R and 24L bulge into a spherical belt shape. The fitting part 74 is formed in a spherical band shape so that the contact parts 24R and 24L can be inserted and removed so as to be in close contact therewith.

3-3-2. Supplementary Explanation of Configuration The contact portions 24R and 24L shown in FIG. 33 are arranged until the end plate portion 24B (corresponding to the end plate portion 45 of the movable lid 42) is reached from the side wall portion (portion swelled in a spherical band shape). The entirety is formed of plastic integrally with the arm portions 13R and 13L of the mounting body 13. FIG. 33A shows the contact portion 24R.
24L is a cross-sectional view showing the internal structure of 24L. As shown in FIG. 33A, in the contact portions 24R and 24L (vibration source accommodation chambers), a striking vibration generation source using a magnet 55 and a moving coil 56 as acoustic vibration generation sources 25R and 25L. Is provided. That is, the acoustic vibration generating sources 25R and 25L in this example include a columnar magnet 55, a moving coil 56 provided concentrically around the magnet 55, and a cylindrical hammer tube 59 to which the moving coil 56 is fixed. And a plurality (two in this example) of supporting films 59s1 and 59s2 that support the hammer tube 59 so as to be movable (vibrated) in the axial direction (left and right in the state shown in the drawing). The magnet 55 is fixed to the center of the bottom of the bottomed cylindrical holding member 58, and is held on the side walls of the contact portions 24R and 24L via the holding member 58. The hammer tube 59 is provided substantially coaxially with the magnet 55 so as to surround the magnet 55. The hammer tube 59 is made of a hard nonmagnetic material. The inner diameter of the hammer tube 59 is selected to be larger than the outer diameter of the magnet 55. The tip of the hammer tube 59 is in light contact with the inner surfaces of the end plate portions 24B of the contact portions 24R and 24L. The support film 59s is a circular flexible film having a circular hole in the center thereof. One supporting film 59s1 is stretched in the holding member 58 by tightly fixing the outer peripheral portion thereof to the inner wall near the bottom portion of the holding member 58 over the entire periphery, and the inner peripheral portion of the supporting film 59s1 is On the outer surface of one end (the bottom side of the holding member 58), it is fixed tightly over the entire circumference. The other supporting film 59s2 is stretched in the holding member 58 by tightly fixing the outer peripheral portion thereof to the inner wall of the opening portion of the holding member 58 over the entire periphery, and the inner peripheral portion thereof is hammer tube 59. The other end (the front end side) of the other end is fixed firmly over the entire circumference. That is, both ends of the hammer tube 59 are supported by the two support films 59s1 and 59s2, so that the hammer tube 59 is held at the center of the holding member 58 so as to be movable in the axial direction.
A solid structure protrusion 63 is provided at the center of the end plate portions of the contact portions 24R and 24L. That is, the hammer tube 59 is in light contact with the inner surfaces of the end plate portions 24B of the contact portions 24R and 24L while being concentrically held with respect to the protruding portion 63.

3-3-3. Action The acoustic vibration generating sources 25R and 25L vibrate the hammer tube 59 in the axial direction in accordance with the input audio signal (electrical signal). That is, since the moving coil 56 is fixed to the hammer tube 59 held so as to be capable of reciprocating (vibrating) in the axial direction, when an audio signal (electrical signal) is input to the moving coil 56, the moving coil 56 and the hammer The tube 59 vibrates together. The end plate portion 24B of the contact portions 24R and 24L is hit by the vibrating hammer tube 59. Due to the impact, acoustic vibration is generated in the end plate portions 24B of the contact portions 24R and 24L.

4). Fourth embodiment 4-1-1. Configuration FIGS. 34 to 37 are views showing examples of the acoustic device according to the present invention.
The acoustic device 4 shown in FIGS. 34 to 37 has the following features 1, 2, 15, 16, 17, 18, 18-2, 19, 19-2, 20, 20-2, 25, and 27. ing.
Feature 1: It has the mounting body 14 which is detachably mounted on the user's head.
Feature 2: It has a first ear plug 90R attached to one outer ear canal H (R) of the user and a second ear plug 90L attached to the other outer ear canal H (L) of the user.
Feature 15: The first ear plug 90R and the second ear plug 90L each include an ear plug body 110 and a vibration source unit 120. The vibration source unit 120 is attached to the end portion of the earplug 110 that is exposed from the ear canal H (R, L). The vibration source unit 120 incorporates a magnetic vibrating body 121. The magnetic vibrating body 121 vibrates due to a change in a magnetic field that acts from outside the vibration source unit 120.
Feature 15-2: A through hole 111 is formed concentrically at the center of the earplug 110.
Feature 15-3: The through hole 111 communicates with the internal space of the casing 123. (Fig. 35,
(FIGS. 36, 38, 41, and 42)
Feature 16: The mounting body 14 includes a first contact portion 24R that is detachably connected to the vibration source unit 120 of the first ear plug 90R that is mounted on one of the user's external ear canals H (R), and the use. A second contact portion 24R that is detachably connected to the vibration source unit 120 of the second ear plug 90L attached to the other ear canal H (L) of the person.
Feature 17: The first contact portion 24R includes a first magnetic field generation source 131R that vibrates the magnetic vibrating body 121 in the vibration source unit 120 of the first earplug 90R. The second contact portion 24R incorporates a second magnetic field generation source 131L that vibrates the magnetic vibrating body 121 in the vibration source unit 120 of the second earplug 90L.
Characteristic 18: Both contact portions 24R and 24L have a fitting portion 24c that fits with the vibration source unit 120.
Feature 18-2: Both contact portions 24R and 24L have a concave portion 24c1 that fits with the convex portion 122 of the vibration source unit 120.
Feature 19: The vibration source unit 120 has a dielectric casing 123. The casing has a convex portion 122.
Feature 19-2: The convex portion 122 is a disc-shaped convex portion.
Feature 20: The magnetic vibrating body 121 is provided in the convex portion 122 of the casing 123.
Feature 20-2: The magnetic vibrating body 121 is a disk-shaped magnetic vibrating body.
Feature 25: The ear plug 110 is made of a foam material. The foam material has both shape recovery and flexibility.
Characteristic 27: The mounting body 14 has a watertight structure in which the inside is isolated from the outside.

4-1-2. Supplementary Explanation of Configuration The mounting body 14 includes a headband portion 14A that straddles the user's occipital region, an ear hooking portion (hook portion) 14B that extends in an arch shape so as to straddle the ears from the left and right ends of the headband portion 14A, And an arm portion 14C that is rotatably connected to the front end of the hook portion 14B in the front-rear direction. The contact portions 24R and 24L are provided at the distal end portion of the arm portion 14C.
A wireless communication unit 15 is provided at the center of the headband unit 14A. In the wireless communication unit 15, a receiving circuit that receives a wireless signal from an external device, a signal generating circuit that processes the received signal to generate an audio signal (electrical signal), and a battery that supplies power to them A cylindrical through hole 111 is formed at the center of the earplug 110.
The casing 123 of the vibration source unit 120 is fixed to the end surface of the earplug 110 opposite to the insertion side. The casing 123 has a disk-like fixing portion 123a having the same diameter as the outer diameter of the earplug body 110, and this fixing portion 123a is fixed to the end surface on the opposite side of the earplug body 110 by bonding.
The convex part 122 is integrally molded concentrically with the fixing part 123a. The outer diameter dimension of the convex part 122 is selected to be smaller than the outer diameter dimension of the fixing part 123a. The convex part 122 has a hollow structure. A through hole 123b is formed at the center of the fixing part 123a, and the through hole 111 of the earplug 110 and the hollow part of the convex part 122 (the internal space of the casing 123) 122a are mutually connected via the through hole 123b. Communicate.
The magnetic vibrating body 121 is provided in the hollow portion 122 a of the convex portion 122. In the magnetic vibrating body 121, the magnetic vibrating body 121 is held on the side wall of the convex portion 122 via an annular holding body 124.
The inner diameter size of the concave portion 24c1 of both the contact portions 24R and 24L is selected to be slightly larger than the outer diameter size of the convex portion 122 of the vibration source unit 120. The depth of the concave portion 24c1 is selected to be smaller than the height of the convex portion 122, and when the concave portion 24c1 and the convex portion 122 are fitted to each other, the bottom surface of the concave portion 24c1 and the end surface of the convex portion 122 are mutually connected. It comes to touch.
The first magnetic field generation source 131R and the second magnetic field generation source 131L include a magnet 132 and a coil 133. The magnet 132 is concentrically provided at the center of each contact portion 24R, 24L. The tip surface of the magnet 132 is fixed to the inner surfaces of the end plate portions of the contact portions 24R and 24L. The coil 133 is concentrically provided with a gap on the outside of the magnet 132. The coil 133 is fixed to the inner surfaces of the end plate portions of the contact portions 24R and 24L. A signal line extending from a signal generation circuit in the wireless communication unit 15 is connected to both ends of the winding of the coil 133.

The first magnetic field generation source 131R and the second magnetic field generation source 131L convert an audio signal (electric signal) transmitted from a signal generation circuit in the wireless communication unit 15 via a signal line into a magnetic field fluctuation (vibration). . That is, an audio signal (electrical signal) is input to the coil 133, and a varying magnetic field is generated by the interaction between the current in the coil 133 and the magnetic field of the magnet 132.

4-1-3. Action The acoustic device 4 has the first ear plug 90R on one (right) of the user's external ear canal H (R) and the second ear plug 90L on the other user's (left) external ear canal H (L). In the mounted state, the concave portion 24c1 of the first contact portion 24R is the convex portion 122 of the vibration source unit 120 of the first ear plug 90R, and the concave portion 24c1 of the second contact portion 24L is the vibration source unit of the second ear plug 90L. The projections 122 of 120 are fitted and used. At this time, the magnetic vibrating body 121 in the vibration source unit 120, the magnet 132 in the contact portions 24R and 24L, and the coil 133 are in the state of being closest to each other and facing each other. This state is a state in which the magnetic field generated by the coil 133 is most effectively applied to the magnetic vibrating body 121. Even if the fitting between the concave portion 24c1 and the convex portion 122 is slightly incomplete, The magnetic field generated by the coil 133 can act on the magnetic vibrator 121 sufficiently effectively. Between the magnetic vibrating body 121 and the coil 133, there are a bottom plate portion of the concave portion 24c1 and an end plate portion of the convex portion 122, both of which are dielectrics, and do not affect the magnetic field. .

The acoustic device 4 generates a sound signal (electric signal) by receiving a signal wirelessly transmitted from an external device by a receiving circuit in the wireless communication unit 15 and processing the signal by a signal generating circuit. This audio signal (electrical signal) is input to the first magnetic field generation source 131R and the second magnetic field generation source 131L in the left and right contact portions 24R, 24L through the signal line. Both magnetic field generation sources 131R and 131L generate a varying magnetic field in accordance with the input audio signal (electrical signal). Due to the action of the changing magnetic field, the magnetic vibrating body 121 in the vibration source unit 120 vibrates. When the magnetic vibrating body 121 vibrates, sound (sound using air as a medium) is generated. Then, this sound (sound using air as a medium) is emitted into the user's external auditory canal H (R, L) through the through hole 123b of the vibration source unit 120 and the through hole 111 of the ear plug 110, It is transmitted to the eardrum as an air conduction sound. On the other hand, the vibration of the magnetic vibrating body 121 is transmitted to the skin of the external auditory canal H (R, L) through the casing 123 and the ear plug 110, and is transmitted to the auditory organ such as the eardrum as skin conduction sound or bone conduction sound. The Thus, in this embodiment, the vibration of the magnetic vibrating body 121 is transmitted to the auditory organ not only as a sound using air as a medium but also as a sound using skin or the like as a sound, and is heard as sound. The ratio (sound volume ratio) of the sound using air as a medium and the sound using skin as a medium can be adjusted by appropriately selecting the material, dimensions, and the like of the casing 123 and the earplug 110.

The magnetic field generated by the coils 133 of the magnetic field generation sources 131R and 131L can act on the magnetic vibrating body 121 only when the vibration source unit 120 and the contact portions 24R and 24L are fitted to each other. Therefore, even when an audio signal is input to the magnetic field generation sources 131R and 131L, if the vibration source unit 120 and the contact portions 24R and 24L are not fitted to each other, the magnetic vibration member 121 has no acoustic vibration. Does not occur. Since the contact parts 24R and 24L do not have a vibrating body (mechanical vibration element) in the first place, they do not emit any sound.

4-1-4. Effect The acoustic device 4 is used in a state where the concave portions 24c1 of the contact portions 24R and 24L are fitted to the convex portions 122 of the vibration source unit 120 of the earplugs 90R and 90L, and a magnetic field generation source in the contact portions 24R and 24L. Since the magnetic vibrating body 121 in the vibration source unit 120 is vibrated by the magnetic field generated from the 131R and 131L, it is configured to generate sound according to the input signal. . That is, as shown in FIG. 36, even when the concave portion 24c1 and the convex portion 122 are completely fitted to each other, that is, in the optimum fitting state, the magnetic vibrating body 121 and the magnetic field generation sources 131R and 131L are not in space. In this state, the magnetic field generating source 131R is configured to apply a magnetic field to the magnetic vibrating body 121, so that the concave portion 24c1 and the convex portion 122 are slightly fitted to each other. Even if it becomes a perfect state, the magnetic vibrating body 121 can be vibrated by the magnetic field generated from the magnetic field generation sources 131R and 131L, and good listening performance can be exhibited.

This acoustic device 4 includes earplugs 90R and 90L that can block the external auditory canal H (R, L) in a watertight manner, and since the mounting body 14 has a watertight structure, it can be used even in an environment that gets wet with water. Since the earplugs 90R, 90L and the mounting body 14 are completely separated from each other, even when the mounting body 14 is detached from the head during use of the acoustic device 4, the earplug 90R, 90L is safe because it does not deviate from the external auditory canal H (R, L). That is, the earplugs 90R, 90L attached to the external auditory canal H (R, L) continue to exhibit their original functions (sound insulation function, waterproof function) even when the attachment body 14 is removed. Therefore, this acoustic device 4 can also be used during swimming and surfing.

Since the sound device 4 does not generate any sound when the mounting body 14 is not mounted (when the concave portion 24c1 and the convex portion 122 are not fitted to each other), the mounting body 14 is detached during use. However, there is no discomfort due to the generation of sound to surrounding people. Therefore, the acoustic device 4 is extremely suitable for use in public vehicles such as passenger planes and passenger trains.

4-2. Other examples 4-2-1. Configuration FIGS. 38 and 39 are diagrams showing another embodiment of the present invention.
The acoustic device 4 shown in FIG. 38 and FIG. 39 is in addition to the above features 1, 2, 15, 16, 17, 18, 18-2, 19, 19-2, 20, 20-2, 25, and 27. Further, the following feature 22 is provided.
Feature 22: The outer peripheral portion of the convex portion 122 and the inner peripheral portion of the concave portion 24c1 are detachably engaged with each other.

4-2-2. Supplementary Explanation of Configuration An annular locking projection 122a is formed on the outer peripheral portion of the side wall of the convex portion 122 of the casing 123 of the vibration source unit 120 along the circumferential direction. The cross-sectional shape of the locking projection 122a is a semicircular shape.
A plurality (four in this example) of locking portions (locking claws) 24c are arranged at equal intervals in the circumferential direction at the tip of the side wall (cylindrical portion) forming the recess 24c1 of the vibration source unit 120. Is formed. A locking groove 24d that engages with the protrusion 122a of the casing 123 is formed inside each locking portion 24c.
When the convex portion 122 of the casing 123 of the vibration source unit 120 and the concave portion 24c1 of the contact portions 24R and 24L are completely fitted, the locking projection 122a and the locking groove 24d are engaged. The resistance (force transmitted to the user's finger) changes before and after the locking protrusion 122a and the locking groove 24d are engaged, and a sound ("click" sound) is generated at the moment of engagement.

4-2-3. Action / Effect The user confirms that the mounting body 14 is correctly mounted, that is, the fitting state between the vibration source unit 120 of the ear plugs 90R and 90L and the contact portions 24R and 24L of the mounting body 14 is complete. It can be known from the feeling and sound of the finger when the locking projection 122a and the locking groove 24d are engaged.

4-3. Other Examples FIG. 40 is a diagram showing another example of the present invention.
A cylindrical acoustic hole 111-2 is formed at the center of the earplug body 110 of the earplugs 90R and 90L of FIGS. 40 (a), (b), (e), and (f). The acoustic hole 111-2 extends from the end surface on the opposite side of the earplug 110 to the vicinity of the end surface on the insertion side. The acoustic hole 111-2 communicates with the hollow portion 122a of the casing 123.
The vibration source units 120 of the earplugs 90R and 90L in FIGS. 40C and 40D have an acoustic tube portion 123d inserted coaxially into the earplug body 110. The fixing portion 123c of the casing 123 is composed only of an annular flange portion formed outside the opening end of the convex portion 122. One side of the magnetic vibrating body 121 faces the end surface on the side opposite to the insertion side of the earplug 110. The ear plug 110 has a solid structure. That is, neither the through hole 111 nor the acoustic hole 111-2 is formed in the earplug body 110.
The earplugs 90R and 90L in FIGS. 40 (e) and (f) have the following feature 24.
Feature 24: The vibration source unit 120 includes an acoustic tube portion 123d that is coaxially inserted into the earplug 110.
The acoustic tube portion 123d protrudes from the center portion of the fixing portion 123c of the casing 123 and communicates with the hollow portion 122a of the casing 123 through the through hole 123b of the fixing portion 123c. The acoustic tube portion 123d is formed in a cylindrical shape. The acoustic tube portion 123d is inserted in an airtight manner into the acoustic hole 111-2.

4-4. Other examples 4-4-1. Configuration FIGS. 41 and 41 are diagrams showing another embodiment of the present invention.
The acoustic device 4 shown in FIGS. 41 and 42 has the above features 1, 2, 15, 16, 17, 18, 18-2, 19, 19-2, 20, 20-2, 24, 25, and 27. In addition, it has the following features 22 and 23.
Feature 22: The outer peripheral portion of the convex portion 122 and the inner peripheral portion of the concave portion 24c1 are detachably engaged with each other.
Feature 23: Both contact portions 24R and 24L accommodate the exposed portion of the vibration source unit 120 and contact the end surface of the earplug 110 over the entire circumference.
4-3-2. Supplementary Explanation of Configuration The casing 123 has a disk-like fixing part 123e having the same diameter as the convex part 122, and the fixing part 123e is fixed to the end surface of the earplug 110 on the side opposite to the insertion side by bonding. That is, the adhering portion 123e of the casing 123 of the earplugs 90R and 90L includes only a portion that closes the opening of the convex portion 122. A through hole 123b is formed at the center of the fixing portion 123e.
An annular locking projection 122 a is formed along the circumferential direction on the outer peripheral portion of the side wall of the convex portion 122 of the casing 123 of the vibration source unit 120. The cross-sectional shape of the locking projection 122a is a semicircular shape.
An annular locking groove 24e is formed along the circumferential direction on the inner side of the side wall (cylindrical portion) forming the recess 24c1 of the vibration source unit 120.
When the convex portion 122 of the casing 123 of the vibration source unit 120 and the concave portion 24c1 of the contact portions 24R, 24L are completely fitted, the tips of the contact portions 24R, 24L (end surfaces of the cylindrical portions) are the earplugs 110. The locking projection 122a and the locking groove 24e are engaged with each other on the opposite end surface of the non-insertion side. The resistance (force transmitted to the user's finger) changes before and after the locking protrusion 122a and the locking groove 24e are engaged, and a sound ("click" sound) is generated at the moment of engagement.

4-4-3. Action / Effect The user confirms that the mounting body 14 is correctly mounted, that is, the fitting state between the vibration source unit 120 of the ear plugs 90R and 90L and the contact portions 24R and 24L of the mounting body 14 is complete. It can be known from the feeling and sound of the finger when the locking projection 122a and the locking groove 24d are engaged.
In addition, since the tips of the contact portions 24R and 24L are in contact with the entire end of the earplug 110 on the opposite side of the insertion end, sound leakage during use can be prevented.

4-5. Other examples 4-5-1. Structure FIGS. 43 to 46 are diagrams showing another embodiment of the present invention.
The acoustic device 4 shown in FIGS. 43 to 46 is characterized by the features 1, 2, 15, 16, 17, 18, 18-2, 19, 19-2, 20, 20-2 of the embodiments shown in FIGS. 24, 25, and 27 have the following features 19-3, 20-3, and 21 instead of 19-2 and 20-2.
Feature 19-3: The convex portion 122 is a rod-shaped convex portion.
Feature 20-3: The magnetic vibrating body 121 is a rod-shaped magnetic vibrating body. The magnetic vibrating body 121 is provided coaxially with the convex portion 122.
Feature 21: Both the magnetic field generation sources 131R and the second magnetic field generation source 131L are provided so as to surround the recess 24c1.
4-5-2. Supplementary Explanation of Configuration The earplug body 110 is a cylindrical solid earplug body.
The casing 143 of the vibration source unit 120 is fixed to the end surface of the ear plug 110 opposite to the insertion side. The casing 143 has a disk-like fixing portion 143a having the same diameter as the outer diameter of the earplug body 110, and the fixing portion 143a is fixed to the end surface on the opposite side of the earplug body 110 by bonding.
The convex portion 142 is integrally formed concentrically with the fixing portion 143a. The convex part 142 has a hollow structure.
The magnetic vibrating body 141 is provided in the hollow portion 142 a of the convex portion 142. The magnetic vibrating body 141 is held on the side wall of the convex portion 142 via the holding body 160.
The holding body 160 is a member made entirely of a soft rubber (elastomer) -like dielectric, and elastically supports the magnetic vibrating body 141. The holding body 160 has a cylindrical body part 161 that is fixed in close contact with the inner surface of the side wall of the convex part 142, and a pair of end plate parts 162 that close both ends of the cylindrical body part 161. A support portion 163 that supports the end portion of the magnetic vibrating body 141 is formed at the center of each end plate portion 162. That is, the holding body 160 supports the magnetic vibrating body 141 so as to vibrate by supporting both end portions of the magnetic vibrating body 141 with both end plate portions 162.
The inner diameter dimension of the concave portion 24c1 of both the contact portions 24R and 24L is selected to be slightly larger than the outer diameter dimension of the convex portion 142 of the vibration source unit 120. Further, the depth of the concave portion 24c1 is selected to be smaller than the height of the convex portion 142.
The first magnetic field generation source 151R and the second magnetic field generation source 151L have a coil 153. The coil 153 is wound around and fixed to the outside of the side wall 24d of the recess 24c1. A signal line extending from a signal generation circuit in the wireless communication unit 15 (FIG. 34) is connected to both ends of the winding of the coil 15.

The first magnetic field generation source 151R and the second magnetic field generation source 151L convert the audio signal (electric signal) transmitted from the signal generation circuit in the wireless communication unit 15 via the signal line into the fluctuation (vibration) of the magnetic field. . That is, by inputting an audio signal (electric signal) to the coil 153, a magnetic field that fluctuates in the coil 153 is generated.
4-5-3. Action The acoustic device 4 has the first ear plug 90R on one (right) of the user's external ear canal H (R) and the second ear plug 90L on the other user's (left) external ear canal H (L). In the mounted state, the concave portion 24c1 of the first contact portion 24R is the convex portion 142 of the vibration source unit 120 of the first ear plug 90R, and the concave portion 24c1 of the second contact portion 24L is the vibration source unit of the second ear plug 90L. 120 projections 142 are used by being fitted respectively. At this time, the magnetic vibrating body 14 in the vibration source unit 120
1 is inserted into the coil 153 in the contact portions 24R, 24L. The state in which the convex portion 142 is completely inserted into the concave portion 24c1 is a state in which the magnetic field generated by the coil 153 is most effectively applied to the magnetic vibrating body 151, but the fitting between the concave portion 24c1 and the convex portion 142 is performed. Even if the state is slightly incomplete, the magnetic field generated by the coil 153 can sufficiently effectively act on the magnetic vibrating body 141. Between the magnetic vibrating body 141 and the coil 153, there are the side wall portion of the concave portion 24c1 and the side wall portion of the convex portion 142, both of which are dielectrics and do not affect the magnetic field.

The acoustic device 4 generates a sound signal (electric signal) by receiving a signal wirelessly transmitted from an external device by a receiving circuit in the wireless communication unit 15 and processing the signal by a signal generating circuit. This audio signal (electrical signal) is input to the first magnetic field generation source 151R and the second magnetic field generation source 151L in the left and right contact portions 24R and 24L through the signal line. Both magnetic field generation sources 151R and 151L generate a fluctuating magnetic field according to the input audio signal (electric signal). The magnetic vibrating body 141 in the vibration source unit 120 vibrates by the action of the changing magnetic field. The vibration of the magnetic vibrating body 141 is transmitted to the skin of the external auditory canal H (R, L) through the casing 143 and the ear plug 110, and is transmitted to the auditory organ such as the eardrum as skin conduction sound or bone conduction sound, and as sound. Listened to.

The magnetic field generated by the coils 153 of the magnetic field generation sources 151R and 151L can act on the magnetic vibrating body 141 only when the vibration source unit 120 and the contact portions 24R and 24L are fitted to each other. Therefore, even when an audio signal is input to the magnetic field generation sources 151R and 151L, if the vibration source unit 120 and the contact portions 24R and 24L are not fitted to each other, the magnetic vibration body 141 has no acoustic vibration. Does not occur. Since the contact parts 24R and 24L do not have a vibrating body (mechanical vibration element) in the first place, they do not emit any sound.

4-5-4. Effect The acoustic device 4 is used in a state where the concave portions 24c1 of the contact portions 24R and 24L are fitted to the convex portions 142 of the vibration source unit 120 of the ear plugs 90R and 90L, and a magnetic field generation source in the contact portions 24R and 24L. Since the magnetic vibrating body 141 in the vibration source unit 120 is vibrated by the magnetic field generated from the 151R and 151L, it is configured to generate sound according to the input signal, so that it can always exhibit good listening performance. . That is, as shown in FIG. 45, even when the concave portion 24c1 and the convex portion 142 are completely fitted to each other, that is, in the optimum fitting state, the magnetic vibrating body 141 and the magnetic field generation sources 151R and 151L are not in space. In this state, the magnetic field generating sources 151R and 151L are configured to apply a magnetic field to the magnetic vibrating body 141, so that the concave portion 24c1 and the convex portion 142 are fitted to each other. Even in a slightly incomplete state, the magnetic vibrating body 141 can be vibrated by the magnetic field generated from the magnetic field generation sources 151R and 151L, and good listening performance can be exhibited.

This acoustic device 4 includes earplugs 90R and 90L that can block the external auditory canal H (R, L) in a watertight manner, and since the mounting body 14 has a watertight structure, it can be used even in an environment that gets wet with water. Since the earplugs 90R, 90L and the mounting body 14 are completely separated from each other, even when the mounting body 14 is detached from the head during use of the acoustic device 4, the earplug 90R, 90L is safe because it does not deviate from the external auditory canal H (R, L). That is, the earplugs 90R, 90L attached to the external auditory canal H (R, L) continue to exhibit their original functions (sound insulation function, waterproof function) even when the attachment body 14 is removed. Therefore, this acoustic device 4 can also be used during swimming and surfing.

Since the sound device 4 does not generate any sound when the mounting body 14 is not mounted (when the concave portion 24c1 and the convex portion 122 are not fitted to each other), the mounting body 14 is detached during use. However, there is no discomfort due to the generation of sound to surrounding people. Therefore, the acoustic device 4 is extremely suitable for use in public vehicles such as passenger planes and passenger trains.

5). Fifth Embodiment In the acoustic devices 1 to 3 of the first to third embodiments, a known bone conduction speaker (solid vibration generator) is used as the acoustic vibration generation sources 25R and 25L.

The acoustic device of the present invention can be used for a hearing aid. That is, a microphone, a drive circuit (including an amplifier circuit, a filter circuit, etc.) that drives an acoustic vibration generation source according to an output signal of the microphone, a battery, a volume controller (output volume control) ), Etc. can be added to achieve a hearing aid that is compact and lightweight, has a very good wearing feeling, and exhibits extremely high listening performance even under high noise.

(A) is a front view of the mounting body, (b) is a side view of the mounting body. (A) is a cross-sectional view of the earplug when not worn, and (b) is a cross-sectional view of the earplug when worn. Cross-sectional view of the main part of the acoustic device in use (a) is the main part on the left side (b) is the main part on the right side Side view showing the usage state of the acoustic device Front view of wearing body Inside view of wearing body Outside view of the body (A) is a cross-sectional view of the main part of the contact part, (b) is a front view of the main part of the contact part. (A) to (f) are cross-sectional views of earplugs Partially broken front view of audio device (A) Side view of earplug, (b) Side view of earplug body, (c) Side view of vibrator Side view showing the usage state of the acoustic device Front view of wearing body Cross-sectional view of the main part of the mounting body (a) is the main part on the right side (b) is the main part on the left side Partially broken front view of the body (A) Side view of earplug, (b) Side view of earplug body, (c) Side view of vibrator Front view of the main part of the audio device (a) is the main part on the right side (b) is the main part on the left side (A), (b) is a sectional view of the contact portion (A), (b) is a sectional view of the contact portion (A) Side view of earplug, (b) Side view of earplug body, (c) Side view of vibrator (A) Side view of earplug, (b) Side view of earplug body, (c) Side view of vibrator (A) is a front view of the mounting body, (b) is a side view of the mounting body. (A) is a cross-sectional view of the earplug when not worn, and (b) is a cross-sectional view of the earplug when worn. Cross-sectional view of the main part of the acoustic device in use (a) is the main part on the left side (b) is the main part on the right side Cross section of protrusion (A) to (c) are cross-sectional views of the protrusions (A), (b) is a cross-sectional view of the earplug Front view of wearing body (A) is a front view of the mounting body, (b) is a side view of the mounting body. Side view of earplug Cross-sectional view of the main part of the acoustic device in use (a) is the main part on the left side (b) is the main part on the right side (A), (b) is a sectional view of the contact portion, (c) is a side view of the main part of the acoustic device (A) is a cross-sectional view of the contact portion, (b) is a side view of the main part of the acoustic device. (A) is a side view showing the usage state of the acoustic device, (b) is a front view of the mounting body. (A) is a cross-sectional view of the earplug when not worn, (b) is a cross-sectional view of the earplug when worn, (c) is a cross-sectional view of the contact portion Cross-sectional view of the main part of the acoustic device in use (a) is the main part on the right side (b) is the main part on the left side (A) is a front view of the vibration source unit, (b) is a cross-sectional view of the earplug, and (c) is a front view of the contact portion. Cross-sectional view of the main part when the acoustic device is in use (a) is a state where the earplug and the mounting body are not fitted, (b) is a state where it is fitted (A) is a front view of the vibration source unit, (b) is a cross-sectional view of the earplug, and (c) is a front view of the contact portion. (A) to (f) are cross-sectional views of earplugs Cross-sectional view of the main part when the acoustic device is in use (a) is a state where the earplug and the mounting body are not fitted, (b) is a state where it is fitted Cross-sectional view of the main part when the acoustic device is in use (a) is a state where the earplug and the mounting body are not fitted, (b) is a state where it is fitted (A) is a cross-sectional view of the earplug when not worn, (b) is a cross-sectional view of the earplug when worn, (c) is a cross-sectional view of the contact portion (A) Side view of main part of earplug (b) Front view of vibration source unit (c) Side view of contact part (d) Front view of contact part Cross-sectional view of the main part of the acoustic device in use (a) is the main part on the left side (b) is the main part on the right side (A) is a side view of the main part of the vibration source unit, (b) is a side view of the holding body holding the magnetic vibrating body, (c) is a CC cross-sectional view of (b), (d) is of (b) The figure which looked at the holding body from the direction of arrow D

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Wearing body 11A Headband part 11B Hook part 11C Arm part 11-1 1st ear hanging body 11-2 2nd ear hanging body 12 Wearing body 13 Mounting body 14 Wearing body 21R 1st earplug 21L 2nd earplug 22 Ear Plug body 22b Anti-insertion side end face 23 Vibrating body 23a Insertion side end part 23b Anti-insertion side end part 23c Bar-shaped part 24a Contact surface 24b Recess 24c Fitting part 24c1 Recess 24e Locking groove 24R First contact part 24L Second contact part 25R First acoustic vibration source 25L Second acoustic vibration source 26 Expanded portion 27 Fitting portion 29 Elastic body portion 30 Ear plug 30b Non-insertion side end surface 31 Projection portion 31a Projection end portion 33 Expanded portion 34 Ear plug body 34a Insert side End surface 34b Non-insertion side end surface 35 Vibrating body 36 Rod-like portion 36a End portion 37 Plate-like portion 37a Plate surface 56 Moving coil 59 Hammer tube 61 Protruding portion 70 Ear Plug 71 Connecting hole 72 Flange portion 72 Flange portion 73 Handle portion 73a End surface 74 Fitting portion 90R First ear plug 90L Second ear plug 110 Ear plug body 120 Vibration source unit 121 Magnetic vibrator 111 Through hole 122 Protruding portion 122 Convex portion 122a Locking projection 123 Casing 123e Fastening portion 131R First magnetic field generation source 131L Second magnetic field generation source 142 Protruding portion 141 Magnetic vibrator 142a Hollow portion 143 Casing 143a Fastening portion 160 Holding body H (R) External auditory canal

Claims (35)

1. An acoustic device having the following characteristics.
   Feature 1: It has a mounting body that is detachably mounted on the user's head or ear.
   Feature 2: It has a first ear plug that is attached to one of the user's external ear canals, and a second ear plug that is attached to the other ear canal of the user.
   Feature 3: Each of the first ear plug and the second ear plug has an ear plug body and a vibrating body that is inserted and held concentrically with the ear plug body. One end of the vibrating body is buried in the earplug body. The other end of the vibrating body protrudes from the end surface of the earplug that is exposed from the ear canal.
   Feature 4: The wearing body includes a first contact portion that contacts the vibrating body of the first ear plug that is attached to one of the user's external ear canals, and a second ear that is attached to the other external ear canal of the user. And a second contact portion that contacts the vibrating body of the stopper.
   Feature 5: The mounting body includes a first acoustic vibration generation source that vibrates the first contact portion, and a second acoustic vibration generation source that vibrates the second contact portion.
2. The acoustic device of claim 1 further comprising the following features.
   Feature 6: The vibrating body has a rod-like portion with one end inserted into the earplug body, and the other end of the rod-like portion protrudes from the end face of the earplug body.
3. The acoustic device of claim 1 further comprising the following features.
   Feature 6-2: The tip of the other end of the rod-shaped portion is enlarged in diameter.
4. The acoustic device according to claim 2, further comprising:
   Feature 6-3: The vibrator has a rod-like portion that is inserted into the earplug body and is completely or almost completely embedded, and the earplug body is provided at an end of the rod-like portion on the exposed side. And having an enlarged diameter portion protruding from the end face.
5. The acoustic device according to claim 3 or 4, further comprising the following features.
   Feature 6-4: The enlarged diameter portion is formed in a hemispherical shape or a spherical shape.
6. 6. The acoustic device according to claim 1, further comprising the following characteristics.
   Feature 7: The contact surfaces of the first contact portion and the second contact portion that are in contact with the vibrating body are flat or concave, and the vibrating body contacts a part of the contact surface.
7. The acoustic device of claim 6 further comprising the following features.
   Feature 8: The first contact portion and the second contact portion are formed with recesses that fit into the vibrating body.
8. The acoustic device according to claim 6 or 7, further comprising the following features.
   Feature 9: The first ear plug has a fitting portion that fits with the first contact portion. The second ear plug has a fitting portion that fits with the second contact portion.
9. The acoustic device according to claim 8, further comprising:
   Feature 9-2: The first contact portion bulges out in a spherical band shape. The inner peripheral portion of the fitting portion of the first ear plug is formed in a spherical shape so that the first contact portion can be inserted and removed and can be in close contact therewith. The second contact portion bulges in a spherical band shape. The inner peripheral portion of the fitting portion of the second ear plug is formed in a spherical band shape so that the second contact portion can be inserted and removed and can be in close contact therewith.
10. An acoustic device having the following characteristics.
    Feature 1: It has a mounting body that is detachably mounted on the user's head or ear.
    Feature 4-2: The wearing body has a first contact portion that contacts an earplug attached to one of the user's external ear canals and a second contact portion that contacts the earplug attached to the other external ear canal of the user. A contact portion.
    Feature 5: The mounting body includes a first acoustic vibration generation source that vibrates the first contact portion, and a second acoustic vibration generation source that vibrates the second contact portion.
    Feature 10: The first contact portion and the second contact portion have a protrusion having a smaller diameter than the earplug. The protruding end of the protruding portion contacts the end surface of the earplug that is exposed from the ear canal.
11. The acoustic device according to claim 10, further comprising:
    Feature 10-2: The protruding portion protrudes in a bar shape.
12. The acoustic device of claim 11, further comprising:
    Feature 10-3: The protrusion has an enlarged diameter portion at the tip.
13. The acoustic device according to any one of claims 10 to 12, further having the following characteristics.
    Feature 3: Each of the first ear plug and the second ear plug has an ear plug body and a vibrating body that is inserted and held concentrically with the ear plug body. One end of the vibrating body is buried in the earplug body. The other end of the vibrating body protrudes from the end surface of the earplug that is exposed from the ear canal.
    Feature 11: The vibrating body includes a rod-like portion that is completely or almost completely buried in the earplug body, and a plate-like portion that is formed in a flange shape at an end of the rod-like portion that is exposed. Have The protruding end portion is in contact with the plate surface of the plate-like portion.
14. 14. The acoustic device of claim 13, further having the following characteristics.
    Feature 11-2: The plate surface is a partially concave spherical surface.
15. An acoustic device having the following characteristics.
    Feature 1: It has a mounting body that is detachably mounted on the user's head or ear.
    Feature 12: The wearing body includes a first contact portion having a rod-like protrusion portion that is inserted in an airtight manner so as to be insertable / removable into a connection hole formed in an earplug attached to one of the user's external ear canals, and the use And a second contact portion having a rod-like projection portion that is inserted in an airtight manner so as to be inserted into and removed from a connection hole formed in an earplug attached to the other ear canal of the person.
    Feature 5: The mounting body includes a first acoustic vibration generation source that vibrates the first contact portion, and a second acoustic vibration generation source that vibrates the second contact portion.
16. The acoustic device of claim 15, further comprising:
    Feature 13: The earplug includes a flange portion that closely contacts and closes the inner wall of the ear canal, and a handle portion that extends from the center of the flange portion to the outside of the ear canal.
    Characteristic 13-2: The connecting hole is opened on the end surface of the handle portion.
17. The acoustic device of claim 16 further comprising the following features.
    Feature 13-3: The flange portion has an umbrella shape, an annular shape, or a spiral shape.
18. The acoustic device according to any one of claims 15 to 17, further having the following characteristics.
    Feature 14: The earplug has a fitting portion that fits with each contact portion.
19. The acoustic device of claim 18 further comprising the following features.
    Feature 14-2: The contact portion bulges in a spherical band shape. The inner peripheral part of the fitting part is formed in a spherical band shape so that the contact part can be inserted and removed so as to be in close contact therewith.
20. An acoustic device having the following characteristics.
    Feature 1: It has a mounting body that is detachably mounted on the user's head or ear.
    Feature 2: It has a first ear plug that is attached to one of the user's external ear canals, and a second ear plug that is attached to the other ear canal of the user.
    Feature 15: Each of the first ear plug and the second ear plug has an ear plug body and a vibration source unit. The vibration source unit is attached to the end of the earplug that is exposed from the ear canal. The vibration source unit includes a magnetic vibrating body. The magnetic vibrating body vibrates due to the fluctuation of the magnetic field acting from the outside of the vibration source unit.
    Feature 16: The wearing body is attached to the first earplug vibration source unit of the first earplug that is attached to one of the user's external ear canals, and is attached to the other external ear canal of the user. And a second contact portion that is detachably connected to the vibration source unit of the second earplug.
    Feature 17: The first contact portion incorporates a first magnetic field generation source that vibrates the magnetic vibrating body in the vibration source unit of the first earplug. The first contact portion incorporates a second magnetic field generation source that vibrates the magnetic vibrating body in the vibration source unit of the second earplug.
    Feature 18: Both contact portions have a fitting portion that fits with the vibration source unit.
21. The acoustic device of claim 20, further comprising:
    Feature 19: The vibration source unit has a dielectric casing. The casing has a convex portion.
    Feature 18-2: Both contact portions have a recess that fits into the protrusion of the vibration source unit.
    Feature 20: The magnetic vibrating body is provided in a convex portion of the casing.
22. The acoustic device of claim 20, further comprising:
    Feature 19-2: The convex portion is a disc-shaped convex portion.
    Feature 20-2: The magnetic vibrating body is a disk-shaped magnetic vibrating body.
23. The acoustic device of claim 21, further comprising:
    Feature 19-3: The convex portion is a rod-shaped convex portion.
    Feature 20-3: The magnetic vibrating body is a rod-shaped magnetic vibrating body. It is provided coaxially with the convex portion.
    Feature 21: Both magnetic field generation sources are provided so as to surround the recess.
24. The acoustic device according to any one of claims 21 to 23, further having the following characteristics.
    Feature 22: The outer peripheral portion of the convex portion and the inner peripheral portion of the concave portion are detachably engaged with each other.
25. The acoustic device according to any one of claims 21 to 23, further having the following characteristics.
    Feature 23: Both contact portions accommodate the exposed portion of the vibration source unit and contact the end surface of the earplug over the entire circumference.
26. The acoustic device according to any one of claims 21 to 25, further having the following characteristics.
    Feature 24: The vibration source unit has an acoustic tube portion that is coaxially inserted into the earplug body.
27. The acoustic device according to any one of claims 21 to 26, further having the following characteristics.
    Feature 15-2: A concentric through-hole is formed in the center of the earplug.
28. 28. The acoustic device of claim 27, further comprising:
    Feature 15-3: The through hole communicates with the internal space of the casing.
29. The acoustic device according to any one of claims 1 to 9 or any one of claims 20 to 28, further having the following characteristics.
    Feature 25: The earplug is made of a foam material. The foam material has both shape recovery and flexibility.
30. The acoustic device according to any one of claims 10 to 12, further having the following characteristics.
    Feature 26: The earplug is made of a foam material. The foam material has both shape recovery and flexibility.
31. 30. The acoustic device of claim 29 further having the following features.
    Feature 25-2: The earplug body is a columnar earplug body or a substantially cylindrical earplug body whose end on the side to be inserted into the ear canal is narrowed, or an earplug body having a flange portion that is in close contact with the inner wall of the ear canal. is there.
32. The acoustic device of claim 30 further comprising the following features.
    Feature 26-2: The earplug is a columnar or substantially cylindrical earplug whose end on the side inserted into the ear canal is thin, and has a circular end surface on the side exposed from the ear canal.
33. The acoustic device according to any one of claims 1 to 32, further having the following characteristics.
    Feature 27: The mounting body has a watertight structure in which the inside is isolated from the outside.
34. The acoustic device according to any one of claims 1 to 33, further comprising the following features.
    Feature 28: The wearing body includes a first ear hook body having a first contact portion and a first acoustic vibration generation source, a second ear hook body having a second contact portion and a second acoustic vibration generation source, and Consists of. The first ear hanging body is attached to one ear of the user. The second ear hook is attached to the other ear of the user.
35. The acoustic device according to any one of claims 1 to 33, further comprising the following features.
    Characteristic 29: The mounting body has an arcuate or substantially horseshoe-shaped elastic body portion that straddles the user's head when mounted. When the mounting body is mounted, the first contact portion and the second contact portion are urged toward each other by the elastic force of the elastic body portion.

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