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US 4,947,725 AGranted
Electronic drum
AssigneeCasio Computer Co., Ltd.
InventorYoshio Nomura
Life of this patent
Estimating the term…
Abstract
A vibration plate and cushioning plate are arranged, as a layered structure, within a drum shell in that order as viewed from the inner bottom of the drum shell toward a batter head with a vibration sensing/electric signal producing sensor attached to the vibration plate. A cushioning member is located within the drum shell to elastically support the cushioning plate between the inner bottom surface of the drum shell and the vibration plate. The cushioning member includes an externally urging section for externally urging the vibration plate toward the drum shell and an elastic support section which, when receiving an external strike force exceeding a predetermined value, is elastically deformed toward the inner bottom surface of the drum shell.
Claims25
An electronic drum comprising:
- a shell having an opening portion at one end and a closing portion the other end;
- a strikable member adapted to be struck, said strikable member being located at said opening portion of said shell;
- means for preventing said strikable member from coming out from said opening portion of said shell;
- a cushioning member having a substantially cylindrical configuration and located within said shell and sandwiched between said strikable member and said closing portion of said shell, said cushioning member including a bellows-like urging section for urging said strikable member in a direction toward said opening portion of said shell and a cushioning section which is elastically deformable to allow said strikable member to move toward said closing portion of said shell when a force transmitted from said strikable member is larger than a predetermined value;
- and
- means, mounted within said cushioning member and on said strikable member, for picking up vibration of said strikable member which is produced when said strikable member is struck, and for generating an electrical signal corresponding to the vibration.
3 more elements
An electronic drum comprising:
- a shell having an opening portion at one end and a closing portion the other end;
- a front panel fixed at said opening portion of said shell, said front panel having a central opening portion at its center;
- a cylindrical mounting chassis having two ends, one end being fixed to said central opening portion to locate the other end thereof within said shell, said mounting chassis having an inner space and an outer opening communicating with said inner space;
- a strikable member adapted to be struck, said strikable member being located in said inner space of said mounting chassis;
- means for preventing said strikable member from coming out from said outer opening of said inner space of said mounting chassis, said outer opening of said mounting chassis being located near said opening portion at said one end of said shell;
- a cushioning member having a substantially cylindrical configuration and held within said inner space of said mounting chassis at a position nearer to said closing portion of said shell than to said strikable member, said cushioning member including an urging section for urging said strikable member in a direction toward said outer opening of said inner space of said mounting chassis, and an elastically deformable cushioning section which is elastically deformable to allow said strikable member to move toward said closing portion of said shell when a force transmitted from said strikable member to said cushioning member is larger than a predetermined value;
- and
- means, attached to said strikable member, for picking up vibration of said strikable member which is produced when said strikable member is struck, and for generating an electrical signal corresponding to the vibration.
5 more elements
An electronic drum comprising:
- a drum shell having an opening portion at one end and a closing portion at the other end;
- a strikable member adapted to be struck, said strikable member being located at said opening portion of said drum shell;
- means for preventing said strikable member from coming out from said opening of said drum shell;
- a cushioning member having a substantially cylindrical configuration and located within said drum shell and sandwiched between said strikable member and said closing portion of said drum shell in a compressed manner and sealingly holding a gas in an inner space thereof, said cushioning member including an urging section for urging said strikable member in a direction toward said opening portion of said drum shell, and a cushioning section which is elastically deformable to allow said strikable member to move toward said closing portion of said drum shell when a force transmitted from said strikable member to said cushioning member is larger than a predetermined value;
- and
- means, mounted on said strikable member, for picking up vibration of said strikable member which is produced when said strikable member is struck, and for generating an electrical signal corresponding to the vibration.
3 more elements
Dependencies are inferred from the claim text.