Patents by Inventor Yuichi Kasahara
Yuichi Kasahara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11782235Abstract: A lens driving device, a camera module and a camera-mounted device that can improve the stability the moving operation of AF movable part are provided. A lens driving device includes a base; a lens holder disposed apart from the base in a light axis direction, and configured to hold a lens part; and an autofocus driving part including an auto-focusing coil and an auto-focusing magnet, and configured to move the lens holder in the light axis direction with respect to the base. The auto-focusing coil is disposed at the lens holder. The auto-focusing magnet is disposed at the base. The base includes a magnet holding part provided to protrude to a light reception side in the light axis direction, the magnet holding part being configured to hold the auto-focusing magnet while positioning the auto-focusing magnet. A damper is disposed between the magnet holding part and the lens holder.Type: GrantFiled: November 13, 2020Date of Patent: October 10, 2023Assignee: Mitsumi Electric Co., Ltd.Inventors: Yuichi Kasahara, Norikazu Kudo
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Patent number: 11740432Abstract: A lens driving device, a camera module and a camera-mounted device that can improve the stability the moving operation of AF movable part are provided. A lens driving device includes a base; a lens holder disposed apart from the base in a light axis direction, and configured to hold a lens part; and an autofocus driving part including an auto-focusing coil and an auto-focusing magnet, and configured to move the lens holder in the light axis direction with respect to the base. The auto-focusing coil is disposed at the lens holder. The auto-focusing magnet is disposed at the base. The base includes a magnet holding part provided to protrude to a light reception side in the light axis direction, the magnet holding part being configured to hold the auto-focusing magnet while positioning the auto-focusing magnet. A damper is disposed between the magnet holding part and the lens holder.Type: GrantFiled: November 13, 2020Date of Patent: August 29, 2023Assignee: Mitsumi Electric Co., Ltd.Inventors: Yuichi Kasahara, Norikazu Kudo
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Publication number: 20210149152Abstract: A lens driving device, a camera module and a camera-mounted device that can improve the stability the moving operation of AF movable part are provided. A lens driving device includes a base; a lens holder disposed apart from the base in a light axis direction, and configured to hold a lens part; and an autofocus driving part including an auto-focusing coil and an auto-focusing magnet, and configured to move the lens holder in the light axis direction with respect to the base. The auto-focusing coil is disposed at the lens holder. The auto-focusing magnet is disposed at the base. The base includes a magnet holding part provided to protrude to a light reception side in the light axis direction, the magnet holding part being configured to hold the auto-focusing magnet while positioning the auto-focusing magnet. A damper is disposed between the magnet holding part and the lens holder.Type: ApplicationFiled: November 13, 2020Publication date: May 20, 2021Applicant: Mitsumi Electric Co., Ltd.Inventors: Yuichi KASAHARA, Norikazu KUDO
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Patent number: 7515436Abstract: In a communication unit 100, a ground layer section 101 which is a sheet-like conductive material and a power-source layer section 102 which is a sheet-like conductive material are laid out in such a way that their one sides face each other, a voltage is applied in such a way that the power-source layer section 102 has a predetermined reference electric potential to the ground layer section 101, a plurality of conductive layer sections 103 which are sheet-like conductive materials are laid out between the ground layer section 101 and the power-source layer section 102, each conductive layer section 103 and the power-source layer section 102 are coupled together by a pull resistor section 104, a transmission communication element transmits a signal by changing the electric potential of the conductive layer section 103 connected to that communication element with respect to the ground layer section 101, and a reception communication element receives the signal by directly or indirectly detecting a change in eleType: GrantFiled: June 18, 2004Date of Patent: April 7, 2009Assignee: Cell Cross CorporationInventors: Hiroyuki Shinoda, Naoya Asamura, Keiji Matsumoto, Yuichi Kasahara, Xinyu Wang, Tachio Yuasa, Takayuki Iwamoto, Yousuke Morishita
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Patent number: 7308750Abstract: In a rolling process, the level of rolling performed by a rolling mill for one operation is set to 1 ?m to 20 ?m. A magnesium substrate is rolled by rollers while being heated by a thermostatic chamber. As a result, there is manufactured a high-quality magnesium sheet which is less susceptible to influence of oxidation, which realizes a high internal loss, prevention of a drop in sensitivity, and low distortion, and which has a thickness of 30 ?m to 100 ?m. Further, as a result of the magnesium sheet being formed into a semi-dome shape or a dome shape, the sheet can be inexpensively manufactured as a speaker for high-tone playback. In particular, in the case of a magnesium diaphragm into which a dome section and an edge section are integrally formed, high-quality sound can be played back in a high frequency range without involvement of a drop in sensitivity.Type: GrantFiled: May 12, 2004Date of Patent: December 18, 2007Assignees: Pioneer Corporation, Tohoku Pioneer CorporationInventors: Hiroyuki Tomiyama, Masatoshi Sato, Yoshimi Kudo, Yuichi Kasahara
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Publication number: 20070117520Abstract: In a communication unit 100, a ground layer section 101 which is a sheet-like conductive material and a power-source layer section 102 which is a sheet-like conductive material are laid out in such a way that their one sides face each other, a voltage is applied in such a way that the power-source layer section 102 has a predetermined reference electric potential to the ground layer section 101, aplurality of conductive layer sections 103 which are sheet-like conductive materials are laid out between the ground layer section 101 and the power-source layer section 102, each conductive layer section 103 and the power-source layer section 102 are coupled together by a pull-resistor section 104, communication elements are so connected as to be laid over the individual conductive layer sections 103, a transmission communication element connected to a conductive layer section 103 transmits a signal by changing the electric potential of the conductive layer section 103 connected to that communication element with reType: ApplicationFiled: June 18, 2004Publication date: May 24, 2007Inventors: Naoya Asamura, Hiroyuki Shinoda, Keiji Matsumoto, Yuichi Kasahara, Xinyu Wang, Tachio Yuasa, Takayuki Iwamoto, Yousuke Morishita
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Publication number: 20050257999Abstract: In the rolling process, a rolling amount at each time of rolling by a rolling machine is set to 1 ?m to 20 ?m, and a magnesium substrate is heated by a constant temperature oven and rolled by rollers. Thus, a magnesium sheet of 30 ?m to 100 ?m is produced. This magnesium sheet is used to form a bobbin and a diaphragm integrally molded with each other, and the diaphragm is molded into a semi-dome shape or a dome shape. Thus, a bobbin integrated type magnesium diaphragm having the semi-dome shaped diaphragm or the dome shaped diagram is manufactured. The bobbin integrated type magnesium diaphragm is applied to a dynamic speaker device. As a result, the high-quality dynamic speaker device, which realizes high rigidity, high sensibility, high internal loss, less distortion and the like, is obtained.Type: ApplicationFiled: May 12, 2005Publication date: November 24, 2005Applicant: PIONEER CORPORATIONInventors: Hiroyuki Tomiyama, Yuichi Kasahara, Koji Matsumoto
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Publication number: 20050226459Abstract: A vibrating plate for a speaker, includes: a magnesium vibrating plate whose major component is magnesium; and an edge comprising a resin in which an inner peripheral edge of the edge is bonded to an outer peripheral edge of the magnesium vibrating plate for attaching the magnesium vibrating plate to a frame, in which the inner peripheral edge of the edge is constituted by a structure having a pinching groove which the outer peripheral edge of the magnesium vibrating plate is brought into close contact with and fitted to, and the edge is formed integrally with the magnesium vibrating plate by insert molding.Type: ApplicationFiled: March 11, 2005Publication date: October 13, 2005Inventors: Hiroyuki Tomiyama, Yuichi Kasahara
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Publication number: 20040231136Abstract: In a rolling process, the level of rolling performed by a rolling mill for one operation is set to 1 &mgr;m to 20 &mgr;m. A magnesium substrate is rolled by rollers while being heated by a thermostatic chamber. As a result, there is manufactured a high-quality magnesium sheet which is less susceptible to influence of oxidation, which realizes a high internal loss, prevention of a drop in sensitivity, and low distortion, and which has a thickness of 30 &mgr;m to 100 &mgr;m. Further, as a result of the magnesium sheet being formed into a semi-dome shape or a dome shape, the sheet can be inexpensively manufactured as a speaker for high-tone playback. In particular, in the case of a magnesium diaphragm into which a dome section and an edge section are integrally formed, high-quality sound can be played back in a high frequency range without involvement of a drop in sensitivity.Type: ApplicationFiled: May 12, 2004Publication date: November 25, 2004Applicant: PIONEER CORPORATION, TOHOKU PIONEER CORPORATIONInventors: Hiroyuki Tomiyama, Masatoshi Sato, Yoshimi Kudo, Yuichi Kasahara