公开(公告)号：EP1224838A4

公开(公告)日：2005-10-05

申请号：EP01919964

申请日：2001-04-16

申请人： MATSUSHITA ELECTRIC IND CO LTD

发明人： USUKI SAWAKO ,  SAIKI SHUJI

IPC分类号： H04R13/02

CPC分类号： H04R13/02

摘要： An electromagnetic transducer includes: a first diaphragm; a second diaphragm provided in a central portion of the first diaphragm, the second diaphragm comprising a magnetic material having a first opening in a central portion thereof; a yoke disposed so as to oppose the first diaphragm; a center pole disposed between the yoke and the first diaphragm, wherein the center pole has a shape which allows insertion into the first opening; a coil disposed so as to surround the center pole; and a first magnet disposed so as to surround the coil.

摘要翻译： 电磁换能器包括：第一隔膜; 设置在所述第一隔膜的中心部分的第二隔膜，所述第二隔膜包括在其中心部分具有第一开口的磁性材料; 设置成与第一隔膜相对的轭; 设置在所述轭和所述第一隔膜之间的中心杆，其中所述中心杆具有允许插入所述第一开口的形状; 设置成围绕中心极的线圈; 以及围绕线圈设置的第一磁体。

公开(公告)号：EP1734784A4

公开(公告)日：2007-11-21

申请号：EP05728861

申请日：2005-04-04

申请人： MATSUSHITA ELECTRIC IND CO LTD

发明人： MATSUMURA TOSHIYUKI ,  SAIKI SHUJI

IPC分类号： H04R1/28 ,  H04R9/02 ,  H04R9/04

CPC分类号： H04R9/025 ,  H04R1/22 ,  H04R9/04 ,  H04R2307/027 ,  H04R2400/11 ,  H04R2499/13 ,  H04R2499/15

摘要： A speaker device having, roughly speaking, a cabinet (1) and a speaker unit (2a). The speaker unit (2a) is attached to an opening formed in the front face of the cabinet (1). The speaker unit (2a) has a rear face frame (3a), a front face frame (4a), a first magnetism circuit (5a), a second magnetism circuit (6a), an edge (7a), a damper (8a), a vibration plate (9a), a voice coil bobbin (10a), and a voice coil (11a). A non-magnet member (91a) constructing a part of the vibration plate (9a), the first magnetism circuit (5a), and the second magnetism circuit (6a) function as a negative stiffness mechanism to suppress the effect of acoustic stiffness, realizing a the speaker device small sized and capable of reproducing a deep sound.

公开(公告)号：EP1128359A4

公开(公告)日：2002-06-12

申请号：EP00956945

申请日：2000-09-06

申请人： MATSUSHITA ELECTRIC IND CO LTD

发明人： ANDOU KIMIHIRO ,  ENOMOTO MITSUTAKA ,  SUZUMURA MASAKI ,  MINAGA KATSUHIKO ,  SAIKI SHUJI ,  USUKI SAWAKO

IPC分类号： G10K9/13 ,  H01F7/06 ,  H04M1/03 ,  H04R13/00 ,  B06B1/04

CPC分类号： H04R13/02 ,  G10K9/13 ,  H04R7/04 ,  H04R2499/11

摘要： The invention relates to an electromagnetic electroacoustic transducer, for example, used in a ringer of a cellular phone. A resin-bonded magnet (11) is formed of a magnetically hard material and a magnetically soft material. The magnet has a magnetic gap, the flux density in which can be changed depending on the proportion of the magnetically soft material so that the lowest resonance frequency can be set easily. The magnetically soft material increases the permeability of the resin-bonded magnet (11), thereby increasing the flux density. This increases the force for driving the vibrator and provides a small electroacoustic transducer capable of producing high sound pressure.

摘要翻译： 本发明涉及一种用于生成移动电话等的输入指示音的电磁换能器。 树脂磁体11由硬磁性材料和软磁性材料形成，通过改变软磁性材料的复合比例，高磁通量，可以通过改变磁隙中的磁通密度来容易地设定最低的共振频率 通过用软磁性材料增加树脂磁体11的磁导率来获得密度，从而通过增加施加到隔膜的驱动力来实现更小的尺寸和更高的声压。