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US 2006/0077577 A1Published application
Zoom lens driving apparatus
AssigneeIndustrial Technology Research Institute
InventorsChen-Chin Cheng, Hsiao-Yue Tsao
Life of this patent
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Abstract
A zoom lens driving apparatus achieves the object of driving multiple lens groups by a single motor and low production cost. When a first lens group, which includes a first lens, moves along guide rods, a leading cam of a leading member drives a leading pin of a follower, so that the follower moves a guide pin, and moves a second lens group, which includes a second lens, along the guide rods. The relative distance between the first lens group and the second lens group is controlled by the leading cam.
Claims24
A lens driving apparatus comprising:
- a first lens group, having a first lens;
- a second lens group, having a second lens;
- at least two guide rods, passing through said first lens group and said second lens group to let said first lens group and said second lens group movable along said guide rods;
- a guide pin, formed on said second lens group;
- a follower, formed with a leading pin and a guide slot corresponding to said guide pin;
- and
- a leading member, having one end fixed to said first lens group, and a leading cam corresponding to said leading pin;
- therefore, upon said first lens group moving along said guide rods, said leading cam of said leading member moves said leading pin of said follower, said follower moves said guide pin to cause said second lens group moving along said guide rods, a relative distance between said first lens group and said second lens group changes according to said leading cam.
5 more elements
A lens driving apparatus comprising:
- a first lens group, having a first lens;
- a second lens group, having a second lens;
- at least two guide rods, passing through said first lens group and said second lens group to let said first lens group and said second lens group movable along said guide rods;
- a guide pin, formed on said second lens group;
- a follower, formed with a leading rack and a guide slot corresponding to said guide pin;
- a gear cluster, engaged with said leading rack;
- and
- a rack, having one end fixed to said first lens group, and a plurality of teeth engaged with said gear cluster;
- therefore, upon said first lens group moving along said guide rods, said plurality of teeth of said rack revolves said gear cluster to move said leading rack of said follower, and let said guide slot move along said guide pin to cause said second lens group moving along said guide rods, a relative distance between said first lens group and said second lens group changes according to said guide slot.
6 more elements
A lens driving apparatus comprising:
- a first lens group, having a first lens;
- a second lens group, having a second lens;
- at least two guide rods, passing through said first lens group and said second lens group to let said first lens group and said second lens group movable along said guide rods;
- a guide slot, formed on said second lens group;
- a follower, formed with a leading pin and a guide pin corresponding to said guide slot;
- and
- a leading member, having one end fixed to said first lens group, and a leading cam corresponding to said leading pin;
- therefore, upon said first lens group moving along said guide rods, said leading cam of said leading member moves said leading pin of said follower, said follower moves said guide pin to cause said second lens group moving along said guide rods, a relative distance between said first lens group and said second lens group changes according to said leading cam.
5 more elements
A lens driving apparatus comprising:
- a first lens group, having a first lens;
- a second lens group, having a second lens;
- at least two guide rods, passing through said first lens group and said second lens group to let said first lens group and said second lens group movable along said guide rods;
- a guide pin, formed on said second lens group;
- a follower, formed with a leading rack and a guide slot corresponding to said guide pin;
- a gear cluster, engaged with said leading rack;
- and
- a rack, having one end fixed to said first lens group, and a plurality of teeth engaged with a gear of said gear cluster;
- therefore, upon said first lens group moving along said guide rods, said plurality of teeth of said rack revolves said gear cluster to move said leading rack of said follower, and let said guide pin move along said guide slot to cause said second lens group moving along said guide rods, a relative distance between said first lens group and said second lens group changes according to said guide slot.
6 more elements
Dependencies are inferred from the claim text.