Key depression amount sensor device
AssigneeSony Group Corporation
InventorsYuki Ogasawara, Hayato Nishioka, Shinichi Furuya
Life of this patent
Estimating the term…
Abstract
A key depression amount sensor device (100) that is installed below keys of a piano, which keys are aligned along a longitudinal axis, and that detects a depression amount of each of the keys, the key depression amount sensor device including: an electronic circuit board (112) including a plurality of optical sensors that respectively detects the depression amounts of the keys by reflection of light; a housing (110) that extends along the longitudinal axis and houses the electronic circuit board; a clamp mechanism (130) that sandwiches an action beam (300), which is positioned below the keys, in a longitudinal axis direction; and a connection mechanism (120) that connects the clamp mechanism and the housing.
Claims18
A key depression amount sensor device that is installed below keys of a piano, which keys are aligned along a longitudinal axis, and that detects a depression amount of each of the keys, the key depression amount sensor device comprising:
- an electronic circuit board including a plurality of optical sensors that respectively detects the depression amounts of the keys by reflection of light;
- a housing that extends along the longitudinal axis and houses the electronic circuit board;
- a clamp mechanism that sandwiches an action beam, which is positioned below the keys, in a longitudinal axis direction;
- and
- a connection mechanism that connects the clamp mechanism and the housing, wherein
- the housing includes
- a pair of side plates extending in the longitudinal axis direction, and
- a bottom plate that is coupled to the pair of side plates, extends along the longitudinal axis, and supports the electronic circuit board,
- the connection mechanism includes
- a fixing member that supports the housing,
- a first rod-shaped member that penetrates a first hole portion provided in a bottom surface of the fixing member and pushes up the bottom plate of the housing to an upper side, and
- protrusion portions that are provided on the fixing member, and respectively come into contact with upper ends of the side plates of the housing and push down the housing,
- the clamp mechanism includes
- a frame member that includes a pair of side surface portions extending in a vertical direction, and an upper surface portion coupled to the pair of side surface portions and parallel to a horizontal plane,
- a connection member coupled to one of the side surface portions and sandwiched between the fixing member and the bottom plate, and
- a second rod-shaped member that penetrates a second hole portion provided in the one side surface portion and engages with a groove provided in an inner surface of the second hole portion,
- the upper surface portion is placed on the action beam, and
- the housing is fixed on the action beam by sandwiching of the action beam between other one of the side surface portions and a tip portion of the second rod-shaped member.
A key depression amount sensor device that is installed above keys of a piano, which keys are aligned along a longitudinal axis, and that detects a depression amount of each of the keys, the key depression amount sensor device comprising:
- an electronic circuit board including a plurality of optical sensors that respectively detects the depression amounts of the keys by reflection of light;
- a housing that houses the electronic circuit board and blocks light from an outside;
- a pair of fixing portions that fixes the housing above the keys;
- and
- a pair of adjustment mechanisms that adjusts a position of the housing in a vertical direction and a lateral axis direction perpendicular to the longitudinal axis on a horizontally extending plane, wherein
- each of the fixing portions has a substantially U shape opened upward and supports one of the adjustment mechanisms via a first rod-shaped member sandwiched by the fixing portion,
- each of the adjustment mechanisms includes
- an upper member connected to the housing, and
- a lower member positioned below the upper member,
- the upper member includes
- a first hole portion penetrating the upper member in the vertical direction, and
- a first screw member that engages with a groove provided in an inner surface of the first hole portion and has one end portion connected to an upper surface of the lower member, and
- the lower member includes
- a second hole portion penetrating the lower member along a lateral axis, and
- the first rod-shaped member that penetrates the second hole portion and is sandwiched inside the fixing portion.
Dependencies are inferred from the claim text.