Seat lifter and gear mechanism
AssigneeDelta Kogyo Co., Ltd.
InventorYuji Ikeda
Life of this patent
Estimating the term…
Abstract
A seat lifter includes: a connecting member that connects a base member and a seat frame that form a seat and swings in response to external rotating force to raise or lower the seat frame; a first gear provided in the connecting member; a second gear that is provided such that an axial direction thereof is parallel to an axial direction of the first gear and meshes with the first gear; and an operating lever that applies rotating force to the second gear. The teeth of at least one of the first and second gears have such a shape that a tooth thickness of the teeth gradually decreases from one end toward the other end in the axial direction, and the first and second gears mesh with each other by approaching each other in the axial direction.
Claims7
A seat lifter comprising:
- a connecting member that connects a base member and a seat frame that form a seat and swings in response to external rotating force to raise or lower the seat frame;
- a first gear provided in the connecting member;
- a second gear that is provided such that an axial direction thereof is parallel to an axial direction of the first gear and meshes with the first gear;
- and
- an operating lever that applies rotating force to the second gear, wherein
- each tooth of one gear of the first and second gears has such a shape that a tooth thickness and a tooth depth dimension of each of the teeth gradually decreases from one end toward the other end in the axial direction, the tooth depth dimension being a dimension from a tooth root to a tooth tip of the respective tooth in a radial direction of the one gear,
- each tooth of the other gear of the first and second gears has a constant thickness over an entirety of the other gear in the axial direction, and
- the teeth of the first gear and the teeth of the second gear mesh with each other by approaching each other in the axial direction.
A gear mechanism comprising a first gear and a second gear that mesh with each other in a state in which axial directions thereof are parallel to each other, wherein
- each tooth of one gear of the first and second gears has such a shape that a tooth thickness and a tooth depth dimension of each of the teeth gradually decreases from one end toward the other end in the axial direction, the tooth depth dimension being a dimension from a tooth root to a tooth tip of the respective tooth in a radial direction of the one gear,
- each tooth of the other gear of the first and second gears has a constant thickness over an entirety of the other gear in the axial direction, and
- the teeth of the first gear and the teeth of the second gear mesh with each other by approaching each other in the axial direction.
Dependencies are inferred from the claim text.