公开(公告)号：US08158876B2

公开(公告)日：2012-04-17

申请号：US12563030

申请日：2009-09-18

Applicant: Mitsuru Kitajima ,  Hirotsugu Suzuki

Inventor： Mitsuru Kitajima ,  Hirotsugu Suzuki

IPC: G10H1/32

CPC classification number: G10H1/346

Abstract: A keyboard apparatus having hammers each adapted for contact at its mass-unconcentrated half with a lower surface of an initial stopper that restricts initial pivot positions of the hammers, thereby reducing a contact force with which each hammer contacts the initial stopper, whereby the required thickness of the initial stopper can be reduced and height positions of key-depression surfaces of the keys in a non-key-depression state can be made uniform with ease. In the non-key-depression state, the hammers are in contact with the lower surface of the initial stopper mounted to a stopper mounting portion of the frame, whereby initial pivot positions of the hammers in a key-depression forward stroke are restricted and key-depression initial positions of respective keys are indirectly restricted, so that the height positions of key-depression surfaces of the keys are made uniform.

Abstract translation: 一种具有锤的键盘装置，每个锤都适于在其质量不集中的一半处与初始挡块的下表面接触，从而限制锤的初始枢转位置，从而减小每个锤与初始挡块接触的接触力，由此所需厚度 可以减小初始挡块的按键凹陷表面的高度位置，并且可以使按键处于非键按压状态的按键表面的高度位置变得均匀。 在非钥匙按压状​​态下，锤子与安装到框架的止动器安装部分的初始止动件的下表面接触，由此锤子的按键向前冲程的初始枢转位置被限制并且键 间接限制各个按键的压缩初始位置，使得按键的按键表面的高度位置均匀。

公开(公告)号：US20110138987A1

公开(公告)日：2011-06-16

申请号：US13035458

申请日：2011-02-25

Applicant: Toshiyuki IWAMOTO ,  Mitsuru KITAJIMA ,  Shigeru MURAMATSU ,  Koichi SAIGO

Inventor： Toshiyuki IWAMOTO ,  Mitsuru KITAJIMA ,  Shigeru MURAMATSU ,  Koichi SAIGO

IPC: G10C3/26

CPC classification number: G10H1/348 ,  G10H1/346

Abstract: A lever is supported by a lever supporting portion. The lever is urged by a first spring and a second spring. The urging force of the first spring varies over the entire operational range of the lever. The second spring and a third spring are provided serially through a movable supporting member. The displacement of the movable supporting member is restricted by a fixed supporting member. If the urging force of the second spring exceeds the urging force of the third spring, the restriction on the displacement of the movable supporting member is removed. Therefore, the present configuration provides a player with feeling similar to that the player perceives when he manipulates a damper pedal of an acoustic piano.

Abstract translation: 杠杆由杠杆支撑部分支撑。 杆被第一弹簧和第二弹簧推动。 第一弹簧的推动力在杠杆的整个操作范围内变化。 第二弹簧和第三弹簧串联地设置在可动支承部件上。 可移动支撑构件的位移由固定的支撑构件限制。 如果第二弹簧的作用力超过第三弹簧的作用力，则可移动支撑构件的移动限制被去除。 因此，本配置为玩家提供了当他操纵原声钢琴的减震踏板时感觉类似的玩家的感觉。

公开(公告)号：US07956261B2

公开(公告)日：2011-06-07

申请号：US12408904

申请日：2009-03-23

Applicant: Toshiyuki Iwamoto ,  Mitsuru Kitajima ,  Shigeru Muramatsu ,  Koichi Saigo

Inventor： Toshiyuki Iwamoto ,  Mitsuru Kitajima ,  Shigeru Muramatsu ,  Koichi Saigo

IPC: G10D3/00

CPC classification number: G10H1/348 ,  G10H1/346

Abstract: A lever 40 is supported by a lever supporting portion 41. The lever 40 is urged by a first spring 45 and a second spring 46. The urging force of the first spring 45 varies over the entire operational range of the lever 40. The second spring 46 and a third spring 47 are provided serially through a movable supporting member 48. The displacement of the movable supporting member 48 is restricted by a fixed supporting member FR. If the urging force of the second spring 46 exceeds the urging force of the third spring 47, the restriction on the displacement of the movable supporting member 48 is removed. Therefore, the present invention provides a player with feeling similar to that the player perceives when he manipulates a damper pedal of an acoustic piano.

Abstract translation: 杠杆40由杠杆支撑部分41支撑。杠杆40由第一弹簧45和第二弹簧46推动。第一弹簧45的推力在杆40的整个操作范围内变化。第二弹簧 46和第三弹簧47串联地设置通过可动支撑构件48.可动支撑构件48的位移受到固定支撑构件FR的限制。 如果第二弹簧46的作用力超过第三弹簧47的作用力，则可移动支撑构件48的移动限制被去除。 因此，本发明提供一种玩家，其具有与玩家在操纵原声钢琴的减震踏板时感觉到的感觉相似的感觉。

公开(公告)号：US20110005370A1

公开(公告)日：2011-01-13

申请号：US12833452

申请日：2010-07-09

Applicant: Mitsuru KITAJIMA

Inventor： Mitsuru KITAJIMA

IPC: G10H1/32

CPC classification number: G10H1/34 ,  G10H1/346

Abstract: A keyboard assembly for an electronic musical instrument comprises an integrally formed multikey unit and a keyboard frame. The multikey unit has a plurality of juxtaposed key bodies and is comprised of three subunits, a sharp key subunit, a C-E-G-B key subunit and a D-F-A key subunit, which are complementary to each other to provide a key unit for a complete one octave. The rear end of each of the key body is extended downward to form a deformable thickness-reduced member to allow a vertical swing of the key body when depressed by a player. The thickness-reduced members are connected into a common connecting member to horizontally align the key bodies in the direction of juxtaposition. The keyboard frame has a vertical rear wall member and a rear top wall member both extending in the direction of the key body alignment, and guide ribs connecting the rear top wall member and the vertical rear wall member. In assembling, the common connecting member is first placed over the rear top wall member, thereafter is slid along the guide ribs, and is temporarily held at the correct position just behind the vertical rear wall member, before being fixed to the vertical rear wall member.

Abstract translation: 用于电子乐器的键盘组件包括一体形成的多键单元和键盘框架。 多键单元具有多个并置的键体，并且由三个子单元，锐利键子单元，C-E-G-B键子单元和D-F-A键子单元组成，它们彼此互补以提供完整的一个八度音阶的键单元。 每个钥匙主体的后端向下延伸以形成可变形的厚度减小的构件，以允许当由玩家压下时钥匙体的垂直摆动。 厚度减小的构件连接到公共连接构件中以沿着并置的方向水平对准键体。 键盘框架具有沿键体对准方向延伸的垂直后壁构件和后顶壁构件，以及连接后顶壁构件和垂直后壁构件的引导肋。 在组装中，首先将公共连接构件放置在后顶壁构件上，然后沿着引导肋滑动，并且在固定到垂直后壁构件之前临时保持在垂直后壁构件正后方的正确位置 。

公开(公告)号：US20100071532A1

公开(公告)日：2010-03-25

申请号：US12563030

申请日：2009-09-18

Applicant: Mitsuru KITAJIMA ,  Hirotsugu Suzuki

Inventor： Mitsuru KITAJIMA ,  Hirotsugu Suzuki

IPC: G10C3/12

CPC classification number: G10H1/346

Abstract: A keyboard apparatus made longitudinally compact while ensuring a pivotal motion range of hammers within a limited space. Common base ends, to which main bodies of white and black keys are connected via vertically extending hinges, are stacked one upon another and fastened to a fastening part of a frame. Hammers are each supported on a hammer pivot shaft such that its rear end is moved upward about the pivot shaft in a key-depression forward stroke. The hammers have their rear ends located forward of rearmost positions of visible parts of black keys. The hammer pivot shafts are located rearward of frontmost positions of the visible parts. A plate portion of the frame, on which key switches are disposed, is located forward of the rearmost positions of the visible parts of the black keys and upward of the fastening part of the frame.

Abstract translation: 一种紧凑的键盘装置，同时确保锤子在有限空间内的枢转运动范围。 通过垂直延伸的铰链将白色和黑色键的主体连接到的共同基端部彼此堆叠并紧固到框架的紧固部分。 锤子各自支撑在锤子枢轴上，使得其后端在键按压向前冲程中围绕枢轴向上移动。 锤子的后端位于黑键可见部分的最后位置的前方。 锤子枢轴位于可见部分的最前面的位置的后方。 框架的板部分设置有钥匙开关，位于黑键的可见部分的最后位置的前方，并且位于框架的紧固部分的上方。

公开(公告)号：US08119895B2

公开(公告)日：2012-02-21

申请号：US12833452

申请日：2010-07-09

Applicant: Mitsuru Kitajima

Inventor： Mitsuru Kitajima

IPC: G10C3/12

CPC classification number: G10H1/34 ,  G10H1/346

Abstract: A keyboard assembly for an electronic musical instrument comprises an integrally formed multikey unit and a keyboard frame. The multikey unit has a plurality of juxtaposed key bodies and is comprised of three subunits, a sharp key subunit, a C-E-G-B key subunit and a D-F-A key subunit, which are complementary to each other to provide a key unit for a complete one octave. The rear end of each of the key body is extended downward to form a deformable thickness-reduced member to allow a vertical swing of the key body when depressed by a player. The thickness-reduced members are connected into a common connecting member to horizontally align the key bodies in the direction of juxtaposition. The keyboard frame has a vertical rear wall member and a rear top wall member both extending in the direction of the key body alignment, and guide ribs connecting the rear top wall member and the vertical rear wall member. In assembling, the common connecting member is first placed over the rear top wall member, thereafter is slid along the guide ribs, and is temporarily held at the correct position just behind the vertical rear wall member, before being fixed to the vertical rear wall member.

Abstract translation: 用于电子乐器的键盘组件包括一体形成的多键单元和键盘框架。 多键单元具有多个并置的键体，并且由三个子单元，锐利键子单元，C-E-G-B键子单元和D-F-A键子单元组成，它们彼此互补以提供完整的一个八度音阶的键单元。 每个钥匙主体的后端向下延伸以形成可变形的厚度减小的构件，以允许当由玩家压下时钥匙体的垂直摆动。 厚度减小的构件连接到公共连接构件中以沿着并置的方向水平对准键体。 键盘框架具有沿键体对准方向延伸的垂直后壁构件和后顶壁构件，以及连接后顶壁构件和垂直后壁构件的引导肋。 在组装时，首先将公共连接构件放置在后顶壁构件上，然后沿着引导肋滑动，并且在固定到垂直后壁构件之前临时保持在垂直后壁构件正后方的正确位置 。

公开(公告)号：US08003871B2

公开(公告)日：2011-08-23

申请号：US12562972

申请日：2009-09-18

Applicant: Mitsuru Kitajima

Inventor： Mitsuru Kitajima

IPC: G10C3/12

CPC classification number: G10C3/12

Abstract: A keyboard apparatus made longitudinally compact while ensuring a pivotal motion range of hammers within a limited space. Common base ends, to which main bodies of white and black keys are connected via vertically extending hinges, are stacked one upon another and fastened to a fastening part of a frame. Hammers are each supported on a hammer pivot shaft such that its rear end is moved upward about the pivot shaft in a key-depression forward stroke. The hammers have their rear ends located forward of rearmost positions of visible parts of black keys. The hammer pivot shafts are located rearward of frontmost positions of the visible parts. A plate portion of the frame, on which key switches are disposed, is located forward of the rearmost positions of the visible parts of the black keys and upward of the fastening part of the frame.

Abstract translation: 一种紧凑的键盘装置，同时确保锤子在有限空间内的枢转运动范围。 通过垂直延伸的铰链将白色和黑色键的主体连接到的共同基端部彼此堆叠并紧固到框架的紧固部分。 锤子各自支撑在锤子枢轴上，使得其后端在键按压向前冲程中围绕枢轴向上移动。 锤子的后端位于黑键可见部分的最后位置的前方。 锤子枢轴位于可见部分的最前面的位置的后方。 框架的板部分设置有钥匙开关，位于黑键的可见部分的最后位置的前方，并且位于框架的紧固部分的上方。

公开(公告)号：US20100071534A1

公开(公告)日：2010-03-25

申请号：US12566536

申请日：2009-09-24

Applicant: Mitsuru KITAJIMA ,  Ichiro OSUGA

Inventor： Mitsuru KITAJIMA ,  Ichiro OSUGA

IPC: G10C3/12 ,  G10H1/32

CPC classification number: G10H1/346

Abstract: A keyboard apparatus configured that heavy loads to support keys and hammers are perpendicularly applied to front-side and rear-side contact portions and the area of a front part of a frame as seen from side can be reduced, thereby suppressing an amount of use of resin. The keyboard apparatus includes a frame integrally formed by resin and mounted with a stopper mounting portion to which an initial stopper is mounted. The frame is supported on a keybed only by front-side and rear-side supporting portions respectively contacting the keybed at locations beneath hammer pivot shafts and beneath key supports. In a longitudinal region between the stopper mounting portion and the front-side supporting portion, the height position of a lowermost part of the frame become higher at a position closer to the stopper mounting portion.

Abstract translation: 一种键盘装置，其构造为支撑键和锤的重负荷垂直地施加到前侧和后侧接触部分，并且可以减小从侧面看的框架的前部区域，从而抑制使用量 树脂。 键盘装置包括由树脂一体形成并安装有止动器安装部分的框架，初始挡块安装在该止动器安装部分上。 框架仅由前侧和后侧支撑部分支撑在键盘上，前侧和后侧支撑部分分别在键枢轴下方和键支撑下方的位置处接触键盘。 在止动器安装部和前侧支撑部之间的纵向区域中，在靠近止动器安装部的位置处，框架的最下部的高度位置变高。

公开(公告)号：US08541672B2

公开(公告)日：2013-09-24

申请号：US13035458

申请日：2011-02-25

Applicant: Toshiyuki Iwamoto ,  Mitsuru Kitajima ,  Shigeru Muramatsu ,  Koichi Saigo

Inventor： Toshiyuki Iwamoto ,  Mitsuru Kitajima ,  Shigeru Muramatsu ,  Koichi Saigo

IPC: G10C3/26

CPC classification number: G10H1/348 ,  G10H1/346

Abstract: A lever is supported by a lever supporting portion. The lever is urged by a first spring and a second spring. The urging force of the first spring varies over the entire operational range of the lever. The second spring and a third spring are provided serially through a movable supporting member. The displacement of the movable supporting member is restricted by a fixed supporting member. If the urging force of the second spring exceeds the urging force of the third spring, the restriction on the displacement of the movable supporting member is removed. Therefore, the present configuration provides a player with feeling similar to that the player perceives when he manipulates a damper pedal of an acoustic piano.

Abstract translation: 杠杆由杠杆支撑部分支撑。 杆被第一弹簧和第二弹簧推动。 第一弹簧的推动力在杠杆的整个操作范围内变化。 第二弹簧和第三弹簧串联地设置在可动支承部件上。 可移动支撑构件的位移由固定的支撑构件限制。 如果第二弹簧的作用力超过第三弹簧的作用力，则可移动支撑构件的移动限制被去除。 因此，本配置为玩家提供了当他操纵原声钢琴的减震踏板时感觉类似的玩家的感觉。

公开(公告)号：US07897860B2

公开(公告)日：2011-03-01

申请号：US12566536

申请日：2009-09-24

Applicant: Mitsuru Kitajima ,  Ichiro Osuga

Inventor： Mitsuru Kitajima ,  Ichiro Osuga

IPC: G10C3/12

CPC classification number: G10H1/346

Abstract: A keyboard apparatus configured that heavy loads to support keys and hammers are perpendicularly applied to front-side and rear-side contact portions and the area of a front part of a frame as seen from side can be reduced, thereby suppressing an amount of use of resin. The keyboard apparatus includes a frame integrally formed by resin and mounted with a stopper mounting portion to which an initial stopper is mounted. The frame is supported on a keybed only by front-side and rear-side supporting portions respectively contacting the keybed at locations beneath hammer pivot shafts and beneath key supports. In a longitudinal region between the stopper mounting portion and the front-side supporting portion, the height position of a lowermost part of the frame become higher at a position closer to the stopper mounting portion.

Abstract translation: 一种键盘装置，其构造为支撑键和锤的重负荷垂直地施加到前侧和后侧接触部分，并且可以减小从侧面看的框架的前部区域，从而抑制使用量 树脂。 键盘装置包括由树脂一体形成并安装有止动器安装部分的框架，初始挡块安装在该止动器安装部分上。 框架仅由前侧和后侧支撑部分支撑在键盘上，前侧和后侧支撑部分分别在键枢轴下方和键支撑下方的位置处接触键盘。 在止动器安装部和前侧支撑部之间的纵向区域中，在靠近止动器安装部的位置处，框架的最下部的高度位置变高。