Patents by Inventor Kazuo Shibukawa
Kazuo Shibukawa 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: 8611028Abstract: A lens barrel 111 according to the present invention includes: a lens group 220 which moves along an optical axis direction 300; and a lens holding frame 224 holding a lens group 220. A guide hole 406 is provided in the lens holding frame 224, the guide hole 406 being penetrated by a main shaft 440 having a circular cross section. A cross section of the guide hole 406 taken orthogonal to a longitudinal direction of the main shaft 440 includes at least two linear portions 406a, and the main shaft 440 is in contact with the two linear portions 406a.Type: GrantFiled: July 23, 2010Date of Patent: December 17, 2013Assignee: Panasonic CorporationInventors: Koichiro Hirabayashi, Kazuo Shibukawa, Fumio Shinano, Shinichi Iwasaki, Masahiro Nakano, Akio Konishi, Takumi Kuwahara
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Patent number: 8553343Abstract: An imaging device support structure includes a master flange having an opening portion through which an optical axis passes, an imaging device which is directly or indirectly attached to the master flange and is positioned in the opening portion as viewed in an optical axis direction, and a shielding member which shields a gap between the master flange and the imaging device in the opening portion. The shielding member includes a slit or a groove and is pressed against an opening edge of the opening portion.Type: GrantFiled: June 13, 2011Date of Patent: October 8, 2013Assignee: Panasonic CorporationInventors: Hiroyasu Fujinaka, Koichiro Hirabayashi, Kazuo Shibukawa
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Publication number: 20120176691Abstract: A lens barrel 111 according to the present invention includes: a lens group 220 which moves along an optical axis direction 300; and a lens holding frame 224 holding a lens group 220. A guide hole 406 is provided in the lens holding frame 224, the guide hole 406 being penetrated by a main shaft 440 having a circular cross section. A cross section of the guide hole 406 taken orthogonal to a longitudinal direction of the main shaft 440 includes at least two linear portions 406a, and the main shaft 440 is in contact with the two linear portions 406a.Type: ApplicationFiled: July 23, 2010Publication date: July 12, 2012Applicant: PANASONIC CORPORATIONInventors: Koichiro Hirabayashi, Kazuo Shibukawa, Fumio Shinano, Shinichi Iwasaki, Masahiro Nakano, Akio Konishi, Takumi Kuwahara
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Publication number: 20110304919Abstract: An imaging device support structure includes a master flange having an opening portion through which an optical axis passes, an imaging device which is directly or indirectly attached to the master flange and is positioned in the opening portion as viewed in an optical axis direction, and a shielding member which shields a gap between the master flange and the imaging device in the opening portion. The shielding member includes a slit or a groove and is pressed against an opening edge of the opening portion.Type: ApplicationFiled: June 13, 2011Publication date: December 15, 2011Applicant: PANASONIC CORPORATIONInventors: Hiroyasu FUJINAKA, Koichiro HIRABAYASHI, Kazuo SHIBUKAWA
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Patent number: 7246766Abstract: A torque limiter includes a first rotatable body rotatable around a rotation shaft as a center of rotation; and a second rotatable body rotatable around the rotation shaft as a center of rotation. The first rotatable body includes one of a magnet and a hysteresis plate. The second rotatable body includes the other of the magnet and the hysteresis plate. The magnet and the hysteresis plate face each other. The first rotatable body and the second rotatable body are in contact with each other. No wall is provided between the rotation shaft and a contact area at which the first rotatable body and the second rotatable body are in contact with each other.Type: GrantFiled: March 30, 2004Date of Patent: July 24, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazuo Shibukawa, Koichiro Hirabayashi
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Patent number: 7167337Abstract: A magnetic recording and reproduction apparatus includes a sub chassis unit on which a cassette is mountable and having first and second reel stands respectively engageable with first reel and second reels of the cassette; a main chassis unit combined with the sub chassis unit and including a rotatable head cylinder used for information recording to, and/or information reproduction from, a magnetic tape; and an idler mounted on the main chassis unit for driving the first and second reel stands. The sub chassis unit further includes a reel lock release member for unlocking a reel lock member of the cassette; a light emitting device for emitting light for detecting a leading end and a trailing end of the magnetic tape; and a section for allowing the idler to be mounted on the main chassis unit after the sub chassis unit is combined with the main chassis unit.Type: GrantFiled: March 25, 2004Date of Patent: January 23, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroshi Kurumatani, Kazuo Shibukawa, Koichiro Hirabayashi
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Patent number: 7163172Abstract: A reel driving device includes a reel stand for driving a reel to rotate; and a latch including at least one contact portion contactable with the reel. The reel stand includes a convexed and concaved portion. The latch includes a claw portion for, when contacting the convexed and concaved portion, stopping a rotation of the convexed and concaved portion. While the reel stand rotates in a first direction, the latch moves in such a direction that the claw portion contacts the convexed and concaved portion by a rotation of the reel stand being conveyed to the at least one contact portion. While the reel stand rotates in a second direction, the latch moves in such a direction that the claw portion is separated from the convexed and concaved portion by a rotation of the reel stand being conveyed to the at least one contact portion.Type: GrantFiled: March 23, 2004Date of Patent: January 16, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazuo Shibukawa, Koichiro Hirabayashi, Akio Konishi, Hiroshi Kurumatani
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Patent number: 6993993Abstract: A sheet metal outsert-molded gear, in which a molded resin gear is formed by outsert-molding along the outer perimeter of a disk-shaped sheet metal, characterized in that one or more notches, holes, or protrusions are provided in the outer perimeter of the disk-shaped sheet metal.Type: GrantFiled: May 21, 2002Date of Patent: February 7, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akio Konishi, Koichiro Hirabayashi, Kazuo Shibukawa
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Publication number: 20040228028Abstract: A magnetic recording and reproduction apparatus includes a sub chassis unit on which a cassette is mountable and which first and second reel stands respectively engageable with first reel and second reel of the cassette a main chassis unit combined with the sub chassis unit and including a rotatable head cylinder used for information recording to, and/or information reproduction from, a magnetic tape; and an idler mounted on the main chassis unit for driving the first and second reel stands. The sub chassis unit further includes a reel lock release member for unlocking a reel lock member of the cassette; a light emitting device for emitting light for detecting a leading end and a trailing end of the magnetic tape; and a section for allowing the idler to be mounted on the main chassis unit after the sub chassis unit is combined with the main chassis unit.Type: ApplicationFiled: March 25, 2004Publication date: November 18, 2004Inventors: Hiroshi Kurumatani, Kazuo Shibukawa, Koichiro Hirabayashi
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Patent number: 6817949Abstract: A torque limiter of the present invention includes: a first rotor and a second rotor; a magnet which is provided so as to be in contact with the first rotor; and a hysteresis board provided so as to be opposed to the magnet with a space therebetween, wherein the hysteresis board is integrally formed with the second rotor, and first and second washers are provided between the first and second rotors so as to be in contact with one another.Type: GrantFiled: May 21, 2002Date of Patent: November 16, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichiro Hirabayashi, Kazuo Shibukawa, Akio Konishi
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Publication number: 20040211855Abstract: A torque limiter includes a first rotatable body rotatable around a rotation shaft as a center of rotation; and a second rotatable body rotatable around the rotation shaft as a center of rotation. The first rotatable body includes one of a magnet and a hysteresis plate. The second rotatable body includes the other of the magnet and the hysteresis plate. The magnet and the hysteresis plate face each other. The first rotatable body and the second rotatable body are in contact with each other. No wall is provided between the rotation shaft and a contact area at which the first rotatable body and the second rotatable body are in contact with each other.Type: ApplicationFiled: March 30, 2004Publication date: October 28, 2004Inventors: Kazuo Shibukawa, Koichiro Hirabayashi
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Publication number: 20040206843Abstract: A reel driving device includes a reel stand for driving a reel to rotate; and a latch including at least one contact portion contactable with the reel. The reel stand includes a convexed and concaved portion. The latch includes a claw portion for, when contacting the convexed and concaved portion, stopping a rotation of the convexed and concaved portion. While the reel stand rotates in a first direction, the latch moves in such a direction that the claw portion contacts the convexed and concaved portion by a rotation of the reel stand being conveyed to the at least one contact portion. While the reel stand rotates in a second direction, the latch moves in such a direction that the claw portion is separated from the convexed and concaved portion by a rotation of the reel stand being conveyed to the at least one contact portion.Type: ApplicationFiled: March 23, 2004Publication date: October 21, 2004Inventors: Kazuo Shibukawa, Koichiro Hirabayashi, Akio Konishi, Hiroshi Kurumatani
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Patent number: 6722992Abstract: A torque limiter of the present invention includes: a first rotor and a second rotor, the first and second rotors rotatable about a single center of rotation; a yoke board integrally formed with the first rotor; a magnet which is provided so as to be in contact with the yoke board; and a hysteresis board provided so as to be opposed to the magnet with a space therebetween, the hysteresis board is integrally formed with the second rotor and a washer having depression portions, protrusion portions, holes, or a combination thereof is provided between the first and second rotors.Type: GrantFiled: May 29, 2002Date of Patent: April 20, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichiro Hirabayashi, Akio Konishi, Kazuo Shibukawa
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Patent number: 6641073Abstract: A reel mount for taking up/feeding a magnetic tape to/from a reel by rotating the reel includes: a first reel mount member having a portion engaged with the reel; a yoke board for providing a magnetic loop, the yoke board integrally formed with the first reel mount member and made of a ferromagnet; a magnet provided on the yoke board so as to be in contact therewith; a hysteresis board provided so as to be opposed to the yoke board with respect to the magnet, the hysteresis board made of a material having large magnetic hysteresis loss; and a second reel mount member integrally formed with the hysteresis board, wherein the reel is in direct contact with the yoke board when the reel is mounted on the reel mount.Type: GrantFiled: May 20, 2002Date of Patent: November 4, 2003Inventors: Koichiro Hirabayashi, Kazuo Shibukawa
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Publication number: 20020178853Abstract: A sheet metal outsert-molded gear, in which a molded resin gear is formed by outsert-molding along the outer perimeter of a disk-shaped sheet metal, characterized in that one or more notches, holes, or protrusions are provided in the outer perimeter of the disk-shaped sheet metal.Type: ApplicationFiled: May 21, 2002Publication date: December 5, 2002Inventors: Akio Konishi, Koichiro Hirabayashi, Kazuo Shibukawa
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Publication number: 20020179393Abstract: A torque limiter of the present invention includes: a first rotor and a second rotor, the first and second rotors rotatable about a single center of rotation; a yoke board integrally formed with the first rotor; a magnet which is provided so as to be in contact with the yoke board; and a hysteresis board provided so as to be opposed to the magnet with a space therebetween, the hysteresis board is integrally formed with the second rotor and a washer having depression portions, protrusion portions, holes, or a combination thereof is provided between the first and second rotors.Type: ApplicationFiled: May 29, 2002Publication date: December 5, 2002Inventors: Koichiro Hirabayashi, Akio Konishi, Kazuo Shibukawa
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Publication number: 20020183120Abstract: A torque limiter of the present invention includes: a first rotor and a second rotor; a magnet which is provided so as to be in contact with the first rotor; and a hysteresis board provided so as to be opposed to the magnet with a space therebetween, wherein the hysteresis board is integrally formed with the second rotor, and first and second washers are provided between the first and second rotors so as to be in contact with one another.Type: ApplicationFiled: May 21, 2002Publication date: December 5, 2002Inventors: Koichiro Hirabayashi, Kazuo Shibukawa, Akio Konishi
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Publication number: 20020175241Abstract: A reel mount for taking up/feeding a magnetic tape to/from a reel by rotating the reel according to the present invention includes: a first reel mount member having a portion engaged with the reel; a yoke board for providing a magnetic loop, the yoke board integrally formed with the first reel mount member and made of a ferromagnet; a magnet provided on the yoke board so as to be in contact therewith; a hysteresis board provided so as to be opposed to the yoke board with respect to the magnet, the hysteresis board made of a material having large magnetic hysteresis loss; and a second reel mount member integrally formed with the hysteresis board, wherein the reel is in direct contact with the yoke board when the reel is mounted on the reel mount.Type: ApplicationFiled: May 20, 2002Publication date: November 28, 2002Inventors: Koichiro Hirabayashi, Kazuo Shibukawa
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Patent number: 6282057Abstract: An apparatus of the present invention is a magnetic recording/reproduction apparatus for pulling out a magnetic tape from a tape cassette, forming a predetermined tape drive system with a group of tape guide posts while winding the magnetic tape around a rotary head cylinder, having a rotary head, for a predetermined arc, so as to perform recording/reproduction of the magnetic tape. The group of tape guide posts include at least one inclination adjustment tape guide post whose inclination angle can be adjusted.Type: GrantFiled: March 15, 1999Date of Patent: August 28, 2001Assignee: Matsushita Electric Industrial Co., LTDInventors: Akio Konishi, Koichiro Hirabayashi, Shuzo Takeda, Shinji Tanaka, Kazuo Shibukawa, Kenji Kawamata, Hisashi Takahashi