Abstract: Provided is a bone conduction speaker unit with which, in order to improve the vibration characteristics, a vibration-suppressing structure is incorporated in a unit main body, whereby sound leakage and vibration from the unit as a single body can be suppressed. The bone conduction speaker unit, including a bone conduction speaker main body incorporated in a casing, uses a flat plate spring for holding the bone conduction speaker main body in the casing, the flat plate spring being disposed such that the direction of vibration of the bone conduction speaker main body being in parallel with the direction of vibration of the flat plate spring.

Abstract: Provided is a bone conduction speaker unit with which the possibility of adsorption of fine iron powder and dirt and dust, entrance of moisture, or the like, has been eliminated, and further the level of the sound leakage from the bone conduction speaker unit as a single element is satisfactorily low over a frequency range that is crucial for good sound transmission using a bone conduction speaker. The bone conduction speaker unit is of magnetic type, having a bone conduction speaker being housed in a unit casing the top of which is opened, with a contact plate for vibration transmission being disposed above a diaphragm of the bone conduction speaker, the top opening of the unit casing being blocked with an elastic membrane that is breathable.

Abstract: A bone conduction speaker is provided that, while it is a bone conduction speaker, additionally has a structure allowing a respiratory tract sound to be generated, thereby the high frequency characteristics thereof being improved. In the case where it is used by a hearing non-impaired person, communications at a good voice level can be made as well as in the case where it is used by a hearing impaired person. Further, when the hearing non-impaired person uses it to listen to a music, the music can be enjoyed with a high sound quality.

Abstract: Problem: To provide a bone conduction speaker that, while it is a bone conduction speaker, additionally has a structure allowing a respiratory tract sound to be generated, thereby the high frequency characteristics thereof being improved, and thus, that, in the case where it is used by a hearing non-impaired person, communications at a good voice level can be made as well as in the case where it is used by a hearing impaired person, and further, when the hearing non-impaired person uses it to listen to a music, the music can be enjoyed with a high sound quality.

Abstract: Provided is a bone conduction speaker unit which can sufficiently prevent generation of sound leakage at non-calling. The bone conduction speaker unit includes a bone conduction speaker main body, being incorporated in a housing with an elastic base being interposed, an elastic cover being mounted on a top face of the housing. Bonding between a rear face of the bone conduction speaker main body and a top face of the elastic base, and/or bonding between the elastic base and an inner bottom face of the housing are partially made; upon the elastic cover having been mounted on the housing, a gap is held between an internal top face of the elastic cover and a top face of the bone conduction speaker main body; and with the elastic cover being pressed in use, the internal top face thereof is abutted against the top face of the bone conduction speaker main body.

Abstract: A basal end cover having a cable entry portion, and an earphone case which accommodates a bone conduction microphone and a bone conduction speaker, being assembled to the basal end cover, with the earphone case including a rigid resin ear plug having a microphone accommodating space in which the bone conduction microphone to be disposed on the distal end side is accommodated, and a speaker accommodating space in which the bone conduction speaker to be disposed on the basal end side is accommodated, and a sensing cover formed of a material softer than that of the ear plug defining the microphone accommodating space, and a bone-conducted sound is picked up by the bone conduction microphone through the sensing cover is provided.

Abstract: Provided is a bone conduction speaker unit which can sufficiently prevent generation of sound leakage at non-calling. The bone conduction speaker unit includes a bone conduction speaker main body, being incorporated in a housing with an elastic base being interposed, an elastic cover being mounted on a top face of the housing. Bonding between a rear face of the bone conduction speaker main body and a top face of the elastic base, and/or bonding between the elastic base and an inner bottom face of the housing are partially made; upon the elastic cover having been mounted on the housing, a gap is held between an internal top face of the elastic cover and a top face of the bone conduction speaker main body; and with the elastic cover being pressed in use, the internal top face thereof is abutted against the top face of the bone conduction speaker main body.

Abstract: Problem: To provide a bone conduction speaker unit which can sufficiently prevent generation of sound leakage at the time of non-calling, and can be easily incorporated in a main body casing of mobile phones, and the like. Solution: A bone conduction speaker unit, being configured by incorporating a bone conduction speaker main body 2 in a housing 1, wherein an elastic plate 21 is fixed on a top face of a plate yoke 17 of the bone conduction speaker main body 2; an elastic base 22 is disposed on a rear face of a yoke 11; and an elastic cover 3 for holding a contact 5 which, upon a pressing force having been applied thereto in use, is abutted against the plate yoke 17 through the elastic plate 21 is loaded on the housing 1 with a gap “a” being held between a bottom face of the contact 5 and a top face of the elastic plate 21.

Abstract: Problem: To provide a bone conduction speaker unit which can sufficiently prevent generation of sound leakage at the time of non-calling, and can be easily incorporated in a main body casing of mobile phones, and the like. Solution: A bone conduction speaker unit, being configured by incorporating a bone conduction speaker main body 2 in a housing 1, wherein an elastic plate 21 is fixed on a top face of a plate yoke 17 of the bone conduction speaker main body 2; an elastic base 22 is disposed on a rear face of a yoke 11; and an elastic cover 3 for holding a contact 5 which, upon a pressing force having been applied thereto in use, is abutted against the plate yoke 17 through the elastic plate 21 is loaded on the housing 1 with a gap “a” being held between a bottom face of the contact 5 and a top face of the elastic plate 21.

Abstract: A basal end cover having a cable entry portion, and an earphone case which accommodates a bone conduction microphone and a bone conduction speaker, being assembled to the basal end cover, with the earphone case including a rigid resin ear plug having a microphone accommodating space in which the bone conduction microphone to be disposed on the distal end side is accommodated, and a speaker accommodating space in which the bone conduction speaker to be disposed on the basal end side is accommodated, and a sensing cover formed of a material softer than that of the ear plug defining the microphone accommodating space, and a bone-conducted sound is picked up by the bone conduction microphone through the sensing cover is provided.

Abstract: One surface of a housing is furnished with an opening larger in diameter than a bone conduction device placed therein. A cushioning material is arranged on the inside surface of the opening, and an abutting member secured to a plate yoke constituting the bone conduction device is supported on the cushioning material, such that the top surface thereof is positioned slightly above the surface of the housing. The cushioning material is an annular disk in which is formed a center hole slightly smaller in diameter than the outside diameter of the bone conduction device. The outside peripheral half of the cushioning material is secured resting on the upper edge of the opening of the housing, and the outside edge of the abutting member is secured resting on the upper edge of the center hole of the cushioning material.

Abstract: It is an object of the invention to provide a headset for performing simultaneous two-way communication or alternate two-way communication, which has excellent sound insulating properties such that external noise is not possibly mixed even when used under high noise conditions. A pair of bowl-shaped housings 1 each having an annular pad 2 attached to the rim of an opening portion are connected together through a headband 3, an acoustic speaker 5 supported by a buffer material 4 is arranged in at least one of the housings 1, and a bone conduction microphone 6 supported by the buffer material 4 such that the distal end is brought into abutment against the ear or the portion around the ear when a user wears the headset is arranged in at least one of the housings 1.

Abstract: [Problem to be Solved] To provide a high-sensitive compact vibration pickup microphone, suitably used as a talking microphone in high ambient noise environments or as a speech recognition input microphone, with high microphone sensitivity, resistance to sliding noise, and insensitivity to external noise and vibration.

Abstract: A cutting edge portion intermediate form that is a pre-sintered body of the cutting edge portion and a supporting portion intermediate form that is a fully sintered body of the supporting portion are manufactured separately. Full sintering is then performed where front end portion of the supporting portion intermediate form is inserted into an insertion hole of the cutting edge portion intermediate form. During sintering, cobalt particles in powdered materials are converted into a liquid phase, and contracting occurs. Because the supporting portion intermediate form has already been fully sintered, only the cutting edge portion intermediate form contracts. The front end portion of the supporting portion intermediate form is squeezed by the cutting edge portion intermediate form. The carbide tip is therefore created in which the cutting edge portion and the supporting portion are strongly bonded.

Abstract: The object is to provide a bone conduction device and its tympanum, wherein the bone conduction device can be efficiently mounted without generating a dead space in a case having a limited installation space such as a cellular phone's case having a large display screen. A magnetic sound converter device has an outer magnetic structure wherein a voice coil (3) is mounted on a center magnetic pole (2) of a yoke (1) and a magnet (4) is arranged on the outer side of the voice coil (3). The yoke (1) and the center magnetic pole (2) thereof are vertically long, the magnet (4) is arranged on the short side edge parts on the both sides of the yoke, and a tympanum fixing part (6) is arranged on the outer side of each magnet (4) on a magnet arrangement axis.

Abstract: It is an object of the invention to provide a headset for performing simultaneous two-way communication or alternate two-way communication, which has excellent sound insulating properties such that external noise is not possibly mixed even when used under high noise conditions. A pair of bowl-shaped housings 1 each having an annular pad 2 attached to the rim of an opening portion are connected together through a headband 3, an acoustic speaker 5 supported by a buffer material 4 is arranged in at least one of the housings 1, and a bone conduction microphone 6 supported by the buffer material 4 such that the distal end is brought into abutment against the ear or the portion around the ear when a user wears the headset is arranged in at least one of the housings 1.

Abstract: To provide a bone conduction speaker that enables a wearer to hear a bone-conducted sound and an air-conducted sound caused by the bone-conducted sound to improve the quality and depth of the sound and allows the wearer to hear external sounds to improve the safety in outdoor use, and a hearing device using the same. When a bone conduction speaker is fitted in an auricle, a part 4, 5 or 6 of a main body 1 of the bone conduction speaker abuts against the entrance and/or the periphery of the entrance of the external auditory meatus to conduct a vibration of the entrance and/or the periphery of the entrance of the external auditory meatus, and a sound pressure caused by the vibration of the entrance and/or the periphery of the entrance of the external auditory meatus conducted by the abutting part is transmitted to the tympanic membrane through the external auditory meatus.

Abstract: A cutting edge portion intermediate form that is a pre-sintered body of the cutting edge portion and a supporting portion intermediate form that is a fully sintered body of the supporting portion are manufactured separately. Full sintering is then performed where front end portion of the supporting portion intermediate form is inserted into an insertion hole of the cutting edge portion intermediate form. During sintering, cobalt particles in powdered materials are converted into a liquid phase, and contracting occurs. Because the supporting portion intermediate form has already been fully sintered, only the cutting edge portion intermediate form contracts. The front end portion of the supporting portion intermediate form is squeezed by the cutting edge portion intermediate form. The carbide tip is therefore created in which the cutting edge portion and the supporting portion are strongly bonded.

Abstract: To provide a microphone used for telecommunication or speech recognition input in a high noise environment, or more specifically, a vibration pickup microphone that hardly howls even when transmission and reception occur simultaneously. A vibration pickup microphone has: a housing 1 attached to a human body contact surface of a transmitter/receiver or the like; a microphone unit 2 of an aerial vibration collecting type incorporated in the housing 1; and a microphone holder 5 that is made of an elastic material and supports the microphone unit 2 in the housing 1. The housing 1 has a case 3 having an opening in an upper surface thereof, in which the microphone holder 5 is fitted, and a cover 4 that is made of an elastic material and covers an outer surface of the case 3. A multilayered diaphragm 6 is disposed on an upper surface of the microphone holder 5 with an air space 16 formed between the multilayered diaphragm 6 and the microphone holder 5.

Abstract: [Problem to be Solved] To provide a high-sensitive compact vibration pickup microphone, suitably used as a talking microphone in high ambient noise environments or as a speech recognition input microphone, with high microphone sensitivity, resistance to sliding noise, and insensitivity to external noise and vibration.