A drive mechanism ( 1 ) of a camera apparatus includes a worm gear ( 4 ) to which a rotational driving force of a drive motor ( 2 ) is transmitted, a worm wheel ( 6 ) around which a helical gear ( 5 ) is formed to engage with the worm gear ( 4 ), and a support frame ( 7 ) which supports the worm wheel ( 6 ) rotatably and movably along a rotation axis. A rotational driving force of the worm gear ( 4 ) is transmitted to the worm wheel ( 6 ) with reduced gear ratio. An externally threaded portion ( 10 ) of a shaft portion ( 8 ) of the worm wheel ( 6 ) is engaged with an internally threaded portion in a supporting hole ( 14 ) of the support frame ( 7 ), so that the shaft portion ( 8 ) moves along the rotation axis when the worm wheel ( 6 ) rotates. Consequently, the rotational driving force transmitted to the worm wheel ( 6 ) is converted into a linear thrust force along the rotation axis. This makes it possible to provide a camera apparatus which can develop a larger thrust force and adjust an amount of travel more finely.

Claims

4 · 2 independent · depth 2

4 granted claims

›1.independentA camera apparatus comprising a drive mechanism which converts a rotational driving force of a drive source into a linear thrust force, wherein the ca…+2

›4.independentA drive mechanism which is mounted on a camera apparatus and converts a rotational driving force of a drive source into a linear thrust force, wherein…

Classifications

5 codes

IPC · International Patent Classification

Section F — Mechanical engineering; lighting; heating; weapons

F16H37/16
F16H21/00
F16H25/08

USPC · US Patent Classification

74/22.R74/425

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File wrapper

Pendency

3.9 y

1,436 days filing → grant

Office actions

non-final + final

Responses

1 RCE

Examiner

Justin Krause

art unit 3658 · TC 3600

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Citations: 12 back · 0 forward

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Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20100192712 A1	5 Aug 2010

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