Link mechanism
AssigneeDenso Corporation
InventorMasato Nishishita
Life of this patent
Estimating the term…
Abstract
In a link mechanism, a first link is disposed to be movable by a driving force from a driving source, and a second link is operatively linked with the first link to move a driven unit. One of the first and second links includes a cam groove having a bent portion which is bent by a radius of curvature smaller than a predetermined value, and the other one of the first and second links includes a pin slidable within the cam groove. In the link mechanism, a sliding speed of the pin sliding in the cam groove is reduced when the pin enters into the bent portion in the cam groove, as compared with the sliding speed before the pin enters into the bent portion.
Claims8
A link mechanism for transmitting a driving force from a driving source to a driven unit, the link mechanism comprising:
- a first link disposed to be movable by the driving force from the driving source;
- a second link operatively linked with the first link in a connection portion to move the driven unit, wherein:
- in the connection portion, one of the first link and the second link includes a cam groove having a bent portion which is bent by a radius of curvature smaller than a predetermined value, and the other one of the first link and the second link includes a pin slidable within the cam groove;
- and
- the pin is disposed to be slidable in the cam groove with a sliding speed, the sliding speed of the pin is set lower when the pin slides within the cam groove by a predetermined amount, as compared with the sliding speed before the pin slides in the cam groove by the predetermined amount.
A link mechanism for transmitting a driving force from a driving source to a driven unit, the link mechanism comprising:
- a first link;
- a second link operatively linked with the first link to move the driven unit;
- and
- a third link driven by the driving force from the driving source to drive the first link, wherein:
- in a connection portion between both the first and second links, one of the first link and the second link includes a first cam groove having a bent portion which is bent by a radius of curvature smaller than a predetermined value, and the other one of the first link and the second link includes a first pin slidable within the first cam groove;
- and
- in a connection portion between both the first and third links, one of the first link and the third link includes a second cam groove, and the other one of the first link and the third link includes a second pin slidable within the second cam groove;
- the second cam groove has first and second operation groove parts in which the first link operates in accordance with a rotation of the third link, and an idling groove part positioned between the first and second operation groove parts, the idling groove part having the radius of curvature approximately equal to that of a locus pictured by the second pin between the first and second operation groove parts;
- and
- the idling groove part is set to approximately correspond to a timing where the first pin enters into the bent portion.
Dependencies are inferred from the claim text.