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US 5,313,250 AGranted
Movement controlling device
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorsMasaaki Miura, Minoru Suzuki
Life of this patent
Estimating the term…
Abstract
A variable power optical system having a mechanical system capable of moving a lens holder and a mirror holder having a predetermined relationship. A driving force moves the lens holder and the mirror holder. The movement of the mirror holder is controlled so as to control the magnification power of the optical system. The present optical system permits a widened power range to be employed without making the total capacity of a machine large.
Claims42
A movement controlling device for controlling a movement of a first moving member that is movable along a predetermined direction and a movement of a second moving member that is movable along another predetermined direction, said movement controlling device comprising:
- means for driving said first moving member so as to move said first moving member along said predetermined direction;
- a cam member comprising a cam portion, a gear portion, and a pulley coaxially arranged for rotation in response to a driving operation executed by said driving means, said cam portion comprising means for driving said second moving member so as to move in accordance with a first function based upon a cam groove formed on said cam portion, whereby a distance between said first moving member and said second moving member is varied in accordance with said first function;
- said gear member comprising means for transmitting drive from said drive means to said cam member, said pulley comprising means for transmitting drive to said first moving member;
- and
- means for converting a variation of said distance to another variation in accordance with a second function, said converting means being arranged between said cam member and said second moving member, wherein said distances varied in response to said second function having been varied in accordance with said first function, said cam groove being shaped so as to vary a contact angle between said converting means and a tangential line at a point at which said converting means contacts said cam portion as said first moving member is driven.
2 more elements
A movement controlling device for controlling a movement of a first moving member that is movable along a first predetermined direction and a movement of a second moving member that is movable along a second predetermined direction, said movement controlling device comprising:
- means for driving said first moving member along said first predetermined direction;
- means for transmitting a driving force of said drive means to said second moving member;
- a cam member including a cam portion, a gear portion, and a pulley coaxially arranged for rotation about a single point, said cam member being rotatable in response to operation of said drive means, said gear portion being coupled to said means for driving, said pulley being coupled to said first moving member, and said cam portion being coupled to said means for transmitting;
- and
- means for controlling said second moving member so that said second moving member moves along said second predetermined direction in accordance with said driving force transmitted to said transmitting means and a moving operation of said first moving member executed by said drive means, said controlling means being arranged between said transmitting means and said second moving member, said controlling means comprising a lever having two arms that are fixedly positioned to be substantially perpendicular to each other, said transmitting means being shaped so as to vary a contact angle between said controlling means and a tangential line at a point at which said controlling means contacts said transmitting means as said first moving member is driven.
2 more elements
A variable power optical system for controlling a movement of a lens holder supporting a predetermined focal lens that is movable along a first predetermined direction and a movement of a mirror holder supporting a plurality of mirrors that is movable along a second predetermined direction and parallel to said first predetermined direction, said variable power optical system comprising:
- means for driving said lens holder along said first predetermined direction;
- a cam member comprising a cam portion, a gear portion and a pulley coaxially arranged for rotation in response to a driving operation executed by said drive means, said cam portion comprising means for driving said mirror holder so as to move in accordance with a first function based upon a cam groove formed on said cam portion, whereby a distance between said lens holder and said mirror holder is varied in accordance with said first function;
- and
- means for converting a variation of said distance to another variation in accordance with a second function, said converting means being arranged between said cam member and said mirror holder, said cam groove being shaped so as to vary a contact angle between said converting means and a tangential line at a point at which said mirror holder contacts said cam groove as said lens holder is driven.
1 more element
A movement controlling device, comprising:
- means for driving a first moving member in a first predetermined direction;
- a cam member comprising a cam portion, a gear portion, and a pulley coaxially arranged for rotation in response to a driving operation executed by said drive means, said cam portion comprising means for driving the second moving member in a second predetermined direction in accordance with a first function, based on a cam groove formed on said cam portion, so that a distance between said first moving member and said second moving member is varied in accordance with said first function;
- and
- means for converting a variation of said distance to another variation in accordance with a second function, said converting means being arranged between said cam member and said second moving member, said converting means comprising a lever member having first and second arm portions that are adapted to be fixably positioned substantially perpendicular to each other, said lever member being pivotally supported by a shaft member, one of said arms being connected to a cam follower member that is movable along said cam groove formed on said cam portion, the other of said arm portions being connected to said second moving member, whereby said another variation is varied in response to said second function having been varied in accordance with said first function, said cam groove being shaped so as to vary a contact angle between said first arm portion of said lever and a tangential line at a point at which said cam follower contacts said cam groove as said first moving member is driven.
1 more element
A movement controlling device, comprising:
- means for driving a first member in a first predetermined direction;
- a cam member comprising a cam portion, a gear portion and a pulley, coaxially arranged for rotation in response to a driving operation executed by said drive means, said cam portion comprising means for driving a second moving member in a second predetermined direction in accordance with a first function, based upon a profile of a cam groove associated with said cam portion, so that a distance between said first moving member and said second moving member is varied in accordance with said first function, said gear member comprising means for transmitting drive from said drive means to said cam member, said pulley comprising means for transmitting drive to said first moving member;
- and
- means for converting a variation of said distance to another variation in accordance with a second function, said converting means being arranged between said cam member and said second moving member, said converting means comprising a lever member having first and second arm portions that are adapted to be fixably positioned substantially perpendicular to each other, said lever member being pivotally supported by a shaft member, one of said arm portions being connected to a cam follower member that is movable along said cam portion, the other of said arm portions being connected to said second moving member, whereby said another variation is varied in response to said second function having been varied in accordance with said first function, said cam groove being shaped so as to vary a contact angle between said first arm portion of said lever and a tangential line at a point at which said cam follower contacts said cam groove as said first moving member is driven.
1 more element
A movement controlling device for controlling the movement of a first moving member that is movable along a first predetermined direction and a movement of a second moving member that is movable along a second predetermined direction, said movement controlling device comprising:
- means for driving said first moving member along said first predetermined direction;
- means for transmitting a driving force of said driving means to said second moving member including a cam member comprising a cam portion, a gear portion, and a pulley portion coaxially arranged for rotation, said cam portion coupled to said second moving member, said pulley coupled to said first moving member and said gear portion comprising means for driving said cam member;
- and
- means for controlling said second moving member so that said second moving member moves along said second predetermined direction in accordance with said driving force transmitted through said transmitting means and a moving operation of said first moving member executed by said driving means, said controlling means being arranged between said transmitting means and a second moving member, said controlling means comprising a lever having two arm members, a pulley provided on one arm member, a flexible member connected to said second moving member and engaging said pulley, said arm members positioned substantially perpendicular to each other, said transmitting means being shaped so as to vary a contact angle between said controlling means and a tangent line at a point at which said controlling means contacts said transmitting means as said first moving member is driven.
1 more element
A movement controlling device comprising:
- means for driving a first moving member in a first predetermined direction;
- a cam member, comprising a cam portion, a gear portion, and a pulley coaxially arranged for rotation in response to a driving operation executed by said driving means, said cam portion comprising means for driving a second moving member in a second predetermined direction in accordance with a first function, based upon a cam groove formed on said cam portion, so that a distance between said first moving member and said second moving member is varied in accordance with said first function;
- and
- means for converting a variation of said distance to another variation in accordance with a second function, said converting means being arranged between said cam member and said second moving member, said converting means comprising a lever member having first and second arms, said first arm carrying a follower engaging said cam groove, said second arm engaging drive means for said second member, said lever member being pivotally mounted for pivoting motion about a point intermediate said arms, whereby said another variation is varied in response to said second function having been varied in accordance with said first function.
1 more element
Dependencies are inferred from the claim text.