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Match Document Document Title
8158876 Keyboard apparatus  
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,...
8148620 Hammer stoppers and use thereof in pianos playable in acoustic and silent modes  
A piano hammer stopper system includes a blocking rail movable between a first position, allowing unobstructed movement of piano hammers, and a second position, blocking at least one piano hammer...
8134060 Electronic keyboard instrument  
In an electronic keyboard instrument, a first switch board 11 and a second switch board 12 are independently provided in a keyboard chassis 1 separated from each other. The first switch board 11...
8119895 Keyboard assembly for electronic musical instrument  
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...
8110732 Keyboard device for electronic keyboard instrument  
A keyboard device for an electronic keyboard instrument, ensuring stable pivotal motion of each key and improved in each of assembly and disassembly. Each key extends in a front-rear direction and...
8088983 Fallboard opening and closing device  
An opening and closing device 10 for a fallboard 8 includes a first damper member 13 that dampens the rotational movement of the fallboard 8 by constantly applying a fixed load to the fallboard 8,...
8080721 Hammer for electronic keyboard instrument  
A hammer for an electronic keyboard instrument, constructed to ensure secure mounting of a weight to a hammer body and enable both assembly and disassembly of the hammer to be easily performed. The...
8076563 Keyboard device  
A keyboard device configured such that, when L represents a distance in a horizontal direction from a rotation support of a hammer member 3 to a contact point where a key 2 comes into contact with...
8049090 Apparatus and method for actuating keyboard mechanisms and evaluating their mechanical properties and stroke characteristics  
New parameters (Down Force, Up Force, Balance Force, and Average Friction) are defined for evaluating important “stroke characteristics” of individual key actions of one or more pianos or key...
8022283 Anthropometric scaffold for keyboard-control pedal  
A scaffold for ergonomic positioning and reliable support of foot-control pedals of musical instruments is disclosed. The scaffold includes a three-walled channel for engaging the distal portion of...
8013228 Electronic keyboard musical instrument having key actuators  
A musical instrument comprises a keyboard assembly including juxtaposed keys and juxtaposed swing weight mechanisms, each of the keys correspondingly linked with each of the swing weight...
8003871 Keyboard apparatus  
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...
7999162 Movable part firmly equipped with balance weight, musical instrument and method of assembling balance weight therein  
Keys of a piano are depressed against the total weight of associated action units and hammers so that balance weight pieces are embedded in the front portion of each key; since the wood bar of the...
7952010 Structure of a key  
A keyboard device has a plurality of keys, each key having a support base where one end of each key is supported and is arranged to allow for movement, and a plate that hides the surface of the...
7947887 Touch control apparatus of electronic musical instrument  
In order to detect a state of a key 30, a differential acceleration sensor 38 is provided in addition to a common position sensor 35 and a velocity sensor 36. A reaction force applied by a solenoid...
7928312 Inverted keyboard instrument and method of playing the same  
An electronic keyboard instrument is provided and methods of playing and assembling the same. The instrument comprises a controller for enabling activation of electronic signals having audible,...
7923619 Keyboard device  
A plurality of keys are supported at a key support parts such that the respective keys are pivoted by a key-pressing operation of a player in a vertical direction, the keys being arranged in...
7915509 Movable pivot bearing for changing key leverage in string keyboard instruments  
A moveable key lever pivot bearing system for keyboard instruments in which the pivot bearing is provided with a longitudinal slot to enable mounting the bearing over a pivot pin disposed on a...
7915508 Keyboard assembly for playing music automatically  
A keyboard assembly for playing music automatically comprises: a plurality of juxtaposed keys including white keys and black keys, each being supported swingable for depression and release thereof;...
7902445 Housing structure of electronic keyboard musical instrument  
A housing structure of an electronic keyboard musical instrument, in which a pivotable upper case can be mounted to and dismounted from a lower case when the upper case is in a semi-open state,...
7897860 Keyboard apparatus  
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...
7858863 Electronic musical instrument keyboard apparatus  
Mass body unit includes a base section, an elongated member, and a mass concentrating section. The elongated member is formed by a thin sheet metal plate being bent, along its length, into a hollow...
7858862 Pedal device for keyboard instrument  
A pedal device of a keyboard instrument which makes it possible to stably secure a required action of a pedal, facilitate assembly thereof, and reduce manufacturing costs. A pedal device for a...
7847173 Compact device for adjusting piano key touch weight  
A series of adjustable springs, rigidly suspended above the keys of a piano, provides a downward force which reduces the effort needed to depress the keys. Precise adjustment of the series, and its...
7816600 Use of constant force spring in keyboard assembly  
An electronic keyboard that includes a plurality of keys including a first key. The keyboard further includes a key support supporting the first key for movement between a rest position and a...
7816598 Electronic keyboard musical instrument having key actuators  
An electronic keyboard musical instrument comprises a keyboard assembly including juxtaposed keys and juxtaposed swing weight mechanisms, each of the keys correspondingly linked with each of the...
7807911 Keyboard musical instrument having keys equipped with balancers biting into keys and method for securing balancers to keys  
Keys of an acoustic piano require balancers for cancellation of a part of self weight of the action units/hammers; however, the balancers are liable to be dropped off due to the aged deterioration...
7790972 Keyboard having key spacing  
A keyboard unit (10) comprising a plurality of keys (12) surrounding a centre (14) and operable singly and chordally by a single finger (or thumb). Preferred arrangements consist of three, four or...
7777115 Keyboard musical instrument  
An approach of a finger of a player to a key in order to conduct an operation for playing music is sensed to exert an external force which resists a depression of the key before the finger whose...
7772474 Keyboard device with an anti-floating part for electronic musical instrument  
A keyboard device is designed for use in an electronic musical instrument. A plurality of keys including white keys and black keys are arranged on a keyboard frame. Supporting parts are mounted on...
7767891 Key for keyboard-based musical instruments  
A key for keyboard-based musical instrument is provided for ensuring high hydrophilia and thereby ensuring higher playing performance. A key 1 for an electronic piano 2 comprises a key body 10 made...
7767892 Keyboard apparatus for electronic musical instrument  
A keyboard apparatus for an electronic musical instrument, in which hammers each have increased rigidity without being excessively increased in the mass thereof. The hammers are provided to...
7750222 Keyboard apparatus of electronic musical instrument  
Keys 1, 2 are supported by a frame 3 in a freely swingable manner. Massive bodies 8, a lower limit stopper 10 and an upper limit stopper 11 are situated below keys 1, 2. Massive bodies 8 are...
7750221 Keyboard-type tone plate percussion instrument and resonance tube and resonance box for tone plate percussion instrument  
A keyboard-type tone plate percussion instrument which is simple in construction and light in weight and capable of easily unifying key-operation feelings and efficiently outputting well-balanced...
7741553 White key for keyboard musical instrument  
A white key for a keyboard musical instrument comprises a key body made of resin in the form of a hollow box shape having an upper wall to be pressed by an instrument player and vertical walls...
7723597 3-dimensional musical keyboard  
An improved 3-dimensional musical keyboard apparatus comprises a plurality of planar, longitudinally extending keys mounted for both downward depression and longitudinal displacement; spring...
7718879 Hammer shank of piano and method of manufacturing the same  
There is provided a hammer shank for a piano which is capable of suppressing a change in the dimension between two arms due to dryness and wetness to thereby ensure smooth and stable operation of a...
7709718 Electronic musical instrument keyboard apparatus  
Keyboard apparatus includes: a plurality of white and black keys: a plurality of mass body units each pivotable in response to operation of a corresponding one of the keys; a frame having mounted...
7709717 Structure for electronic keyboard instrument  
Structure for an electronic keyboard instrument includes upper and lower cases. The lower case has a bottom plate having lower slits, and the upper case has an upper plate having upper slits. The...
7709719 Keyboard apparatus for electronic musical instrument  
A keyboard apparatus for an electronic musical instrument having white keys and black keys capable of providing a satisfactory tactile impression, having a satisfactory appearance, and suppressing...
7700860 Keyboard instrument and fallboard structure thereof  
A fallboard structure of a keyboard instrument capable of selectively shielding or opening the inside of the instrument from or toward a player. A fallboard covers a keyboard section when it is...
7683247 Keyboard apparatus  
A keyboard apparatus in which the radius of turning motion of a mainly operated portion of each black key in a key depressing/releasing direction is maximized so as to enhance the operability of...
7683248 Piano key leveling device and method  
A keyboard musical instrument includes a key, a balance rail, and a key leveling tab. The key leveling tab is permanently mounted on the balance rail. The key leveling tab is non-resonating and has...
7678981 Keyboard structure of electronic keyboard instrument  
A keyboard structure capable of suppressing a depth dimension of a keyboard instrument and rearward displacements of key main bodies to thereby prevent plastic deformation of hinges. White and...
7678989 Use of constant force spring in keyboard assembly  
An electronic keyboard that includes a plurality of keys including a first key. The keyboard further includes a key support supporting the first key for movement between a rest position and a...
7667119 Portable keyboard system  
A portable keyboard system having a pair of keyboards rigidly secured to and directed outward from one another. The keyboard system is secured to a user with shoulder straps, which allow the user...
7659470 Housing structure of electronic keyboard musical instrument  
A housing structure of an electronic keyboard musical instrument, in which a pivotable upper case can be mounted to and dismounted from a lower case when the upper case is in a semi-open state,...
7652207 Key structure and keyboard apparatus  
A key structure which is capable of giving a woody appearance to the key, and increasing the freedom of mounting at least one functional part formed as a separate part from the key structure, while...
7633001 Keyboard-type tone plate percussion instrument  
A keyboard-type tone plate percussion instrument that permits a player to make an operation to select percussion unit's striking a tone plate with or without intervention of a displacement member...
7619154 Instructional device and method for piano or other musical keyboard  
An instructional device and associated method for illustrating the positions of keys and their associated notes on a keyboard are provided. The instructional device includes key markers that are...
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