公开(公告)号：US4330884A

公开(公告)日：1982-05-18

申请号：US121012

申请日：1980-02-13

申请人： Shuichi Obata ,  Hiroshi Yasuda ,  Yukihiro Fukushima

发明人： Shuichi Obata ,  Hiroshi Yasuda ,  Yukihiro Fukushima

IPC分类号： G11B3/14 ,  G11B3/32 ,  G11B3/10

CPC分类号： G11B3/14 ,  G11B3/32

摘要： A pickup arm device comprising a rotary bearing having a mounting bed rotatable about both the vertical and horizontal axes, and an arm assembly consisting of an arm, a cartridge mounting head shell at one end thereof, a rider weight at the other end thereof and a mount or saddle which is formed between the ends thereof and adapted to be slidably mounted on the mounting bed of the rotary bearing, whereby the arm assembly including a cartridge may be easily replaced.

摘要翻译： 一种拾取臂装置，包括具有可围绕垂直和水平轴线旋转的安装床的旋转轴承，以及由臂组成的臂组件，其一端处的筒安装头壳，其另一端的骑手重量和 安装件或鞍座，其形成在其端部之间并且适于可滑动地安装在旋转轴承的安装台上，由此包括卡盘的臂组件可以容易地更换。

公开(公告)号：US5025474A

公开(公告)日：1991-06-18

申请号：US249954

申请日：1988-09-27

申请人： Tsuneo Tanaka ,  Kazue Sato ,  Hiroyuki Takewa ,  Akira Kurozuka ,  Tadashi Tamura ,  Katsuji Hattori ,  Satoshi Takayama ,  Kosaku Murata ,  Katsuaki Satoh ,  Mituhiko Serikawa ,  Youichi Kimura ,  Shuichi Obata

发明人： Tsuneo Tanaka ,  Kazue Sato ,  Hiroyuki Takewa ,  Akira Kurozuka ,  Tadashi Tamura ,  Katsuji Hattori ,  Satoshi Takayama ,  Kosaku Murata ,  Katsuaki Satoh ,  Mituhiko Serikawa ,  Youichi Kimura ,  Shuichi Obata

IPC分类号： G03B21/56 ,  H04R1/02 ,  H04R7/04 ,  H04R9/06

CPC分类号： H04R1/02 ,  G03B21/565 ,  H04R7/04 ,  H04R9/063

摘要： A speaker system has an acoustic diaphragm and an image projection screen provided on a surface of the diaphragm integrally therewith so as to enable the user to enjoy both realistic image on the screen and powerful sound reproduced through the diaphragm. The rear surface of the diaphragm is closed at a peripheral portion thereof while the central portion of the rear surface of the diaphragm is opened to the exterior, so that the speaker system can provide a high level of reproduced sound pressure in low-pitched region, while the thickness of the speaker is reduced remarkably. The diaphgram can be driven by a plurality of driving units so that the speaker system can operate only with an ordinary stereophonic amplifier. The diaphragm can be composed of a pair of diaphragm elements capable of vibrating independently of each other and the screen may be integrally and commonly attached to the surfaces of these diaphragm elements in such a manner as to allow the diaphragm elements to vibrate independently of each other, whereby the speaker system can operate in stereophonic mode. Any variation in the acoustic characteristic attributable to variation in the condition of installation is compensated for by a change in the ratio of the opened area of the rear surface of the diaphragm to the whole effective vibration area or by a selective provision of a sound absorbing member on the rear side of the cabinet.

摘要翻译： 扬声器系统具有隔膜和与其一体地设置在隔膜表面上的图像投影屏幕，以使用户能够欣赏屏幕上的逼真图像和通过隔膜再现的强大声音。 隔膜的后表面在其周边部分封闭，同时隔膜的后表面的中心部分向外开放，从而扬声器系统可以在低音区域提供高水平的再现声压， 而扬声器的厚度显着降低。 可以通过多个驱动单元来驱动该图像，使得扬声器系统只能用普通的立体声放大器操作。 隔膜可以由能够彼此独立地振动的一对隔膜元件构成，并且屏幕可以一体地并且共同地附接到这些隔膜元件的表面，以允许隔膜元件彼此独立地振动 由此扬声器系统可以以立体声模式操作。 通过改变隔膜后表面的开口面积与整个有效振动面积之间的比例，或通过选择性地设置吸音构件来补偿由于安装条件的变化引起的声学特性的任何变化 在机柜的后侧。

公开(公告)号：US5073946A

公开(公告)日：1991-12-17

申请号：US441918

申请日：1989-11-28

申请人： Katsuaki Satoh ,  Kazue Sato ,  Kousaku Murata ,  Tsuneo Tanaka ,  Shuji Saiki ,  Satoshi Takayama ,  Hiroyuki Takewa ,  Mitsuhiko Serikawa ,  Seiichi Ishikawa ,  Sawako Usuki ,  Yoichi Kimura ,  Shuichi Obata

发明人： Katsuaki Satoh ,  Kazue Sato ,  Kousaku Murata ,  Tsuneo Tanaka ,  Shuji Saiki ,  Satoshi Takayama ,  Hiroyuki Takewa ,  Mitsuhiko Serikawa ,  Seiichi Ishikawa ,  Sawako Usuki ,  Yoichi Kimura ,  Shuichi Obata

IPC分类号： H04R1/28 ,  H04R1/34 ,  H04R7/04

CPC分类号： H04R1/2834 ,  H04R1/345 ,  H04R7/04

摘要： A speaker which is thin but which is capable of providing high-fidelity reproduction and ensuring a suitable level of sound pressure even when it is brought close to a wall. A closed chamber is formed behind one part of a disphragm mounted in an enclosure, and an open chamber is formed behind another part of the diaphragm. At least one voice coil driver unit is connected to the diaphragm. The phase difference between sounds radiated from the front and rear surfaces of the diaphragm is increased as large as possible by using an acoustic duct for the sound radiated through the open chamber, thereby minimizing cancellation of sounds and improving the sound pressure level.

公开(公告)号：US4899390A

公开(公告)日：1990-02-06

申请号：US96528

申请日：1987-09-15

申请人： Hiroyuki Takewa ,  Mitsuhiko Serikawa ,  Seiichi Ishikawa ,  Sawako Usuki ,  Yoichi Kimura ,  Shuichi Obata

发明人： Hiroyuki Takewa ,  Mitsuhiko Serikawa ,  Seiichi Ishikawa ,  Sawako Usuki ,  Yoichi Kimura ,  Shuichi Obata

IPC分类号： H04R1/28 ,  H04R1/34 ,  H04R7/04

CPC分类号： H04R1/2834 ,  H04R1/345 ,  H04R7/04

摘要： A speaker which is thin but which is capable of providing high-fidelity reproduction and ensuring a suitable level of sound pressure even when it is brought close to a wall. A closed chamber is formed behind one part of a diaphragm mounted in an enclosure, and an open chamber is formed behind another part of the diaphragm. At least one voice coil drive unit is connected to the diaphragm. The phase difference between sounds radiated from the front and rear surfaces of the diaphragm is increased as large as possible by using an acoustic duct for the sound radiated through the open chamber, thereby minimizing cancellation of sounds and improving the sound pressure level.

摘要翻译： 扬声器虽然薄但能够提供高保真的再现性，并且即使当靠近墙壁时也能确保合适的声压水平。 在安装在外壳中的隔膜的一部分之后形成封闭的室，并且隔膜的另一部分后面形成开放室。 至少一个音圈驱动单元连接到隔膜。 通过使用用于通过开放室辐射的声音的声管，尽可能地增大从隔膜的前表面和后表面辐射的声音之间的相位差，从而最小化声音的消除和提高声压级。

公开(公告)号：US4203606A

公开(公告)日：1980-05-20

申请号：US957312

申请日：1978-11-03

申请人： Shuichi Obata ,  Takayuki Sugihara

发明人： Shuichi Obata ,  Takayuki Sugihara

IPC分类号： G11B3/30 ,  G11B3/31 ,  G11B3/32 ,  G11B3/42 ,  G11B3/10

CPC分类号： G11B3/42 ,  G11B3/31 ,  G11B3/32

摘要： One end of an arm main body is formed integral with a head shell for mounting a cartridge while the other end thereof supports a balance weight. A mounting portion is formed integral with the arm main body between the ends thereof and close to the other end thereof. The mounting portion of the arm main body may be detachably mounted on an inner gimbal which in turn is mounted with pivot bearings to an outer gimbal for rotation about a horizontal axis so as to permit the arm main body to nod up and down. The outer gimbal in turn is mounted with pivot bearings to a yoke for rotation about a vertical axis so as to permit the arm main body to rotate in a horizontal plane. The yoke in turn is securely attached to the base of the pickup arm device.

摘要翻译： 臂主体的一端与用于安装盒的头壳整体形成，而另一端支撑平衡重。 安装部分与臂主体在其端部和其另一端之间形成一体。 臂主体的安装部分可以可拆卸地安装在内万向架上，内万向架又安装有枢转轴承到外万向架，用于围绕水平轴线旋转，以允许臂主体上下起伏。 外部万向架依次安装有枢轴轴承到轭架，用于围绕垂直轴线旋转，以允许臂主体在水平面上旋转。 磁轭又牢固地附接到拾取臂装置的底座。

公开(公告)号：US3975025A

公开(公告)日：1976-08-17

申请号：US381085

申请日：1973-07-20

申请人： Shuichi Obata ,  Akira Kagata ,  Katsuhiko Morita ,  Masatoyo Kubo ,  Masashi Itoh

发明人： Shuichi Obata ,  Akira Kagata ,  Katsuhiko Morita ,  Masatoyo Kubo ,  Masashi Itoh

IPC分类号： H04R17/04 ,  H04R17/08 ,  H04R1/16 ,  G11B3/02 ,  H04R11/08

CPC分类号： H04R17/08

摘要： In a stereophonic pickup cartridge which derives two or more than two electric signals from a stereophonic sound recording disk of so-called 45.degree. -- 45.degree. type, there is provided a displacement-type pickup cartridge having an improved vibration transmission structure.

摘要翻译： 在从所谓45°-45°的立体声录音盘导出两个或多于两个电信号的立体声拾取盒中，提供了一种具有改进的振动传播结构的位移式拾取盒。

公开(公告)号：US4924962A

公开(公告)日：1990-05-15

申请号：US71829

申请日：1987-07-10

申请人： Kenichi Terai ,  Shuji Saiki ,  Kousaku Murata ,  Katsuaki Satoh ,  Yoichi Kumura ,  Yasutoshi Nakama ,  Michiko Ogawa ,  Shuichi Obata

发明人： Kenichi Terai ,  Shuji Saiki ,  Kousaku Murata ,  Katsuaki Satoh ,  Yoichi Kumura ,  Yasutoshi Nakama ,  Michiko Ogawa ,  Shuichi Obata

IPC分类号： H04R1/28

CPC分类号： H04R1/2857 ,  H04R1/2842 ,  H04R1/2865

摘要： A sound reproducing apparatus for use in a vehicle having a speaker system constituted by at least one acoustic duct and a speaker unit disposed at a throat of the acoustic duct, an opening formed at the other end of the acoustic duct facing the passenger compartment of a vehicle. The apparatus is arranged such that, F0 and Fs are substantially equal to each other. Where Fs is the lowest frequency in a frequency range within which the imaginary part of the acoustic impedance at the sound radiating surface of the speaker system in the direction of the space within the passsenger compartment is zero and F0 is the low-range resonance frequency of the speaker system itself in the free space.

摘要翻译： 一种用于具有扬声器系统的车辆的声音再现装置，所述扬声器系统由设置在所述声学导管的喉部处的至少一个声学导管和扬声器单元构成，所述扬声器系统形成在所述声学导管的另一端面对所述乘客室 车辆。 该装置被布置成使得F0和Fs彼此基本相等。 其中Fs是在扬声器系统的声辐射表面的声阻抗的虚部在乘客舱内的空间的方向上为零的频率范围内的最低频率，并且F0是低频共振频率 扬声器系统本身在自由空间。

公开(公告)号：US4276635A

公开(公告)日：1981-06-30

申请号：US123494

申请日：1980-02-21

申请人： Shuichi Obata ,  Masashi Ito

发明人： Shuichi Obata ,  Masashi Ito

IPC分类号： G11B3/42 ,  H04R23/02 ,  G11B3/02

CPC分类号： G11B3/42

摘要： A pickup cartridge and a pickup cartridge mounting device therefor wherein a plug protrusion of tetragonal sectional area is formed at the rear end of a pickup cartridge, a recess of tetragonal sectional area with at least three walls for receiving the plug protrusion is formed at the front end of a tone arm or the like, and after the plug protrusion is inserted into the recess, the protrusion is strongly clamped between two walls of the recess by a mounting screw. Thus, replacement of pickup cartridges is made easy and reliable.

摘要翻译： 一种拾取盒和拾取盒安装装置，其中在拾取盒的后端处形成四边形截面积的插头突起，在前部形成有至少三个用于接收插头突起的壁的四边形截面积的凹部 调音臂等的端部，并且在插头突出部插入到凹部中之后，通过安装螺钉将突起牢固地夹在凹部的两个壁之间。 因此，拾取盒的更换变得容易和可靠。

公开(公告)号：US4263483A

公开(公告)日：1981-04-21

申请号：US938308

申请日：1978-08-29

申请人： Shuichi Obata

发明人： Shuichi Obata

IPC分类号： H04R9/12 ,  H04R9/16

CPC分类号： H04R9/16

摘要： A pick-up assembly carried by a tone arm itself or a cartridge adapted to be connected to the tone arm includes a vibrating section and a magnetic circuit section. The vibrating section has a cantilever having one end carrying a stylus and the other end mounted in a support ring. A pair of ring-shaped moving coils are mounted on the support ring in such a manner that the longitudinal axes of the coils are in parallel and equidistantly spaced relation to the longitudinal axis of the support ring so that the coils are angularly spaced at right angles to each other about the longitudinal axis of the support ring. The magnetic circuit section has a permanent magnet sandwiched between front and rear yokes of magnetic material. The front yoke has a pair of leg portions extending downwardly for positioning the coils in spaced relationship between the leg portions while the rear yoke has a cylindrical support member carrying the support ring in such a manner as to allow the vibrating section to flex angularly and a pair of poles of magnetic material rigidly connected to the cylindrical support member and the rear yoke. Free end portions of the poles remote from the rear yoke are coaxially inserted into the coils respectively for forming a magnetic field between each pole and its corresponding leg portion. A recess in the front yoke improves the separation between the audio channels.

摘要翻译： 由调音臂本身携带的拾音组件或适于连接到音调臂的盒子包括振动部分和磁路部分。 振动部分具有悬臂，其一端承载触笔，另一端安装在支撑环中。 一对环形运动线圈以这样的方式安装在支撑环上，使得线圈的纵向轴线与支撑环的纵向轴线平行且等距离地间隔开，使得线圈以直角成角度地间隔开 围绕支撑环的纵向轴线彼此相对。 磁路部分具有夹在磁性材料的前轭和后轭之间的永磁体。 前轭具有向下延伸的一对腿部，用于在腿部之间以间隔开的关系定位线圈，而后轭具有以允许振动部弯曲弯曲的方式承载支撑环的圆柱形支撑构件， 一对磁性材料的磁极刚性连接到圆柱形支撑构件和后轭。 远离后轭的极的自由端部分别同轴地插入到线圈中，以在每个极与其相应的腿部之间形成磁场。 前轭中的凹槽改善了音频通道之间的间隔。

公开(公告)号：US4302692A

公开(公告)日：1981-11-24

申请号：US41823

申请日：1979-05-23

申请人： Hisayuki Matsumoto ,  Uneho Niimi ,  Shuichi Obata

发明人： Hisayuki Matsumoto ,  Uneho Niimi ,  Shuichi Obata

IPC分类号： H02K11/00 ,  H02K29/14 ,  H02K47/04

CPC分类号： H02K29/14 ,  H02K11/01 ,  H02K11/21 ,  H02K11/225

摘要： A rotational speed signal sensor for a motor having a rotating permanent magnet as a rotor. One cylindrical surface of a hollow cylindrical rotating magnet has a series of magnetic poles which coact with the stator windings so as to produce the torque while the other cylindrical surface of the rotating magnet has a series of magnetic poles which coact with a sensor coil so as to derive the rotational speed signal.

摘要翻译： 一种用于具有旋转永磁体作为转子的电动机的转速信号传感器。 中空圆柱形旋转磁体的一个圆柱表面具有与定子绕组共同作用的一系列磁极，以产生转矩，而旋转磁体的另一个圆柱表面具有与传感器线圈共同的一系列磁极，以便 以得出转速信号。