Method of manufacturing wheel, plate-shaped member, wheel, and timepiece
AssigneeSeiko Epson Corporation
InventorsTakeo FUNAKAWA, Eiichi NAGASAKA
Life of this patent
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Abstract
A method of manufacturing a wheel including a first step of performing etching on a plate-shaped member made of a brittle material to form a wheel including a plurality of teeth, at least one tooth of which is a coupling tooth having a recess opened radially outward at a leading end, a frame portion disposed outside the wheel, and a coupling portion coupling the frame portion to an inner surface of the recess, and a second step of cutting the coupling portion and the wheel.
Claims8
A method of manufacturing a wheel comprising:
- a first step of performing etching on a plate-shaped member made of a brittle material to form a wheel including a plurality of teeth including a coupling tooth having a recess opened radially outward at a leading end, a frame portion disposed outside the wheel, and a coupling portion coupling the frame portion to an inner surface of the recess;
- and
- a second step of cutting the coupling portion and the wheel.
A plate-shaped member made of a brittle material, the plate-shaped member comprising:
- a wheel including a plurality of teeth including a coupling tooth having a recess opened radially outward at a leading end,
- a frame portion disposed outside the wheel, and
- a coupling portion coupling the frame portion to an inner surface of the recess.
A wheel generated by being cut from a plate-shaped member made of a brittle material, the wheel comprising:
- a plurality of teeth, wherein
- the plurality of teeth includes at least one tooth that is a coupling tooth having a recess opened radially outward at a leading end and having a cut surface formed when being cut from the plate-shaped member.
Dependencies are inferred from the claim text.