Arm mechanism
AssigneeSywind Co., Ltd.
InventorNobuo Komatsu
Life of this patent
Estimating the term…
Abstract
An arm mechanism includes a first arm, which is hollow, a second arm, and a connection portion for mutually rotatably connecting the first arm and the second arm. A connection portion 15 includes a rotary shaft extending in a direction perpendicular to an axial direction of a first arm 11 and a second arm 12, a friction portion for generating a frictional force against rotation of the rotary shaft, and a biasing member which is housed in the first arm, has an end portion facing away from the rotary shaft and connected to the first arm, has an end portion facing the rotary shaft and connected to the second arm via a connection member, and generates a contraction force which is increased with an increase in angle between an axis of the second arm and an axis of the first arm by rotation of the rotary shaft.
Claims19
An arm mechanism comprising:
- a first arm, the first arm being hollow;
- a second arm;
- and
- a connection portion configured to mutually rotatably connect the first arm and the second arm,
- the connection portion including:
- a rotary shaft extending in a direction perpendicular to an axial direction of the first arm and the second arm;
- a friction portion configured to generate a frictional force against rotation of the rotary shaft;
- a biasing member configured to be housed in the first arm, the biasing member having an end portion facing away from the rotary shaft and connected to the first arm, the biasing member having an end portion facing the rotary shaft and connected to the second arm via a connection member, the biasing member being configured to generate a contraction force which is increased with an increase in angle between an axis of the second arm and an axis of the first arm by rotation of the rotary shaft;
- and
- a first plate and a second plate connected to the first arm and the second arm, respectively,
- wherein the first and second plates are pivotally supported by the rotary shaft, the friction portion includes a friction plate, and the friction plate is sandwiched by the first plate and the second plate, the friction plate being disposed at the center portion of the cross section of the connection portion.
An arm mechanism comprising:
- a first arm, the first arm being hollow;
- a second arm;
- and
- a connection portion configured to mutually rotatably connect the first arm and the second arm,
- the connection portion including:
- a rotary shaft extending in a direction perpendicular to an axial direction of the first arm and the second arm;
- a friction portion configured to generate a frictional force against rotation of the rotary shaft;
- a biasing member configured to be housed in the first arm, the biasing member having an end portion facing the rotary shaft and connected to the first arm, the biasing member having an end portion facing away from the rotary shaft and connected to the second arm via a connection member, the biasing member being configured to generate a force for pulling the connection member toward an end portion of the first arm facing away from the rotary shaft by the biasing member, by an increase in angle between an axis of the second arm and an axis of the first arm by rotation of the rotary shaft;
- and
- a first plate and a second plate connected to the first arm and the second arm, respectively,
- wherein the first and second plates are pivotally supported by the rotary shaft, the friction portion includes a friction plate, and the friction plate is sandwiched by the first plate and the second plate, the friction plate being disposed at the center portion of the cross section of the connection portion.
Dependencies are inferred from the claim text.