Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
180 words
A lens barrel for a camera, characterized in that it comprises : an outer shell (4) having a pair of guide portions (23) provided at an inside thereof; a lens holding member (12) holding a movable lens (11) thereon, said lens holding member (12) having a pair of guide portions (34) substantially at opposite locations thereof with respect to an optical axis of said movable lens (11), said lens holding member (12) being supported at said guide portions (34) thereof for sliding movement on said guide portions (23) of said outer shell (4); an actuator (15) including a coil (13) securely mounted on said lens holding member (12) and a magnet (14) securely mounted on said outer shell (4), said coil (13) and magnet (14) being disposed coaxially with each other about the optical axis of said movable lens (11); and a position detecting means (36) spaced by substantially equal distances from said two guide portions (34) of said lens holding member (12) for detecting a position of said lens holding member (12) with respect to said outer shell (4).
Claim 2
Dependent Claim
22 words
A lens barrel for a camera according to claim 1, wherein said outer shell (4) has a substantially square prism-like outer profile.
Claim 3
Dependent Claim
59 words
A lens barrel for a camera according to claim 1, further comprising a moving speed detecting means (39) for detecting a speed of movement of said lens holding member (12), said moving speed detecting means (39) being provided at a location spaced at substantially equal distances from said guide portions (23, 34) remote from said position detecting means (36).
Claim 4
Dependent Claim
27 words
A lens barrel for a camera according to claim 1, wherein said position detecting means (36) includes an inclined magnet (37) and a Hall effect element (38).
Claim 5
Dependent Claim
32 words
A lens barrel for a camera according to claim 1, wherein said position detecting means (36A) includes a moving magnet (42) of the alternately magnetized type and a magneto-resistance effect element (43).
Claim 6
Dependent Claim
27 words
A lens barrel for a camera according to claim 3, wherein said moving speed detecting means (39) includes a moving magnet (40) and a detecting coil (41).
Claim 7
Dependent Claim
34 words
A lens barrel for a camera according to claim 1, further comprising a guide shaft (34) provided integrally with said lens holding member (12) for guiding said lens holding member (12) for sliding movement.
Claim 8
Dependent Claim
32 words
A lens barrel for a camera according to claim 1, further comprising a guide shaft (25) secured to said outer shell (4) for guiding said lens holding member (12) for sliding movement.
Claim 9
Dependent Claim
22 words
A lens barrel for a camera according to claim 1, wherein focusing operation is performed by movement of said movable lens (11).
Claim 10
Dependent Claim
32 words
A lens barrel for a camera according to claim 1, further comprising a yoke (35) which surrounds said magnet (14) to prevent leakage of magnetic fluxes to said position detecting means (36).