Fastening structure and keyboard device
AssigneeYamaha Corporation
InventorsKaoru Fujishiro, Ichiro Osuga
Life of this patent
Estimating the term…
Abstract
A fastening structure for fastening a to-be-fastened component to a wooden component by using a screw, wherein the wooden component is made of wood having a specific gravity of 0.08 g/cm3 to 0.85 g/cm3 inclusive, the screw has a nominal diameter of 0.8 mm to 3.5 mm inclusive, and the distance between a neutral position in a longitudinal direction of an effective screw part, which is the portion where the wooden component and a male screw part formed in a shaft part of the screw mesh together, and the surface of the wooden component that comes into contact with the to-be-fastened component is 1 mm to 15 mm inclusive.
Claims6
A fastening structure comprising a to-be-fastened component, a single wood component, and a screw, for fastening the to-be-fastened component to the wood component by using the screw, wherein
- the wood component is made of wood having a specific gravity of 0.08 g/cm3 to 0.85 g/cm3 inclusive;
- the screw has a nominal diameter of 0.8 mm to 3.5 mm inclusive and comprises a head portion and a shaft portion, the shaft portion including a male screw portion and a cylindrical portion provided between the head portion and the male screw portion, the cylindrical portion having no screw thread and no screw groove;
- the distance between an intermediate position in a longitudinal direction of an effective screw portion, which effective screw portion is the portion where the wood component and the male screw portion of the screw mesh together, and a contact surface of the wood component with the to-be-fastened component is 1 mm to 8 mm inclusive;
- the cylindrical portion has a length in the longitudinal direction longer than a length of the to-be-fastened component in the longitudinal direction adjacent the cylindrical portion when the to-be-fastened component is fastened to the single wood component by using the screw;
- the single wood component has a maximum thickness, wherein a tip of the screw is contained within the maximum thickness of the wood component when the to-be-fastened component is fastened to the wood component;
- and
- wherein a distance between a to-be-pressed surface where the to-be-fastened component is pressed from the head portion of the screw and the contact surface is 2 mm or less.
Dependencies are inferred from the claim text.