Lens barrel

• US 20050068638A1
• Filed: 08/09/2004
• Published: 03/31/2005
• Est. Priority Date: 08/12/2003
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Shinohara, Junichi, Nuno, Katsuhiko, Ito, Kaoru, Tsurukawa, Ikuya, Etoh, Akihiro
• Granted Patent: US 7,259,923 B2
• Time in Patent Office: Days
• US Class Current: 359/704
• CPC Class Codes: G02B 7/02 for lenses supports for magnifying lenses G02B25/002
• CPC Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism

Abstract

A lens barrel, including, a moving frame (2) to hold a lens (8), a direct-advance ring (4) provided on an outer periphery of the moving frame and movable relative to the moving frame in an optical direction, a resilient member (6) provided between the moving frame and the direct-advance ring, and a control part (10) provided on the moving frame to control an amount of movement of the direct-advance ring in the optical direction.

Claims

1. A lens barrel, comprising,

a moving frame to hold a lens;

a direct-advance ring provided on an outer periphery of said moving frame and movable relative to said moving frame in an optical direction;

a resilient member provided between the moving frame and the direct-advance ring; and

a control part provided on said moving frame to control an amount of movement of said direct-advance ring in the optical direction.

2. The lens barrel according to claim 1,

wherein said moving frame is provided with a rotational control part to control rotation of said direct-advance ring relative to the moving frame.

3. The lens barrel according to claim 1,

wherein a predetermined pressure is imparted between the moving frame and the direct-advance ring by the resilient member.

4. The lens barrel according to claim 1,

wherein an outer diameter of the moving frame is set to be smaller than that of the direct-advance ring.

12. A photographing optical apparatus comprising the lens barrel as recited in any one of claims 1 to 11.

13. An image inputting apparatus comprising the lens barrel as recited in any one of claims 1 to 11.

5. A lens barrel, comprising:

a moving frame for holding a lens;

a direct-advance ring provided on an outer periphery of said moving frame and movable relative to said moving frame in an optical direction;

a resilient member provided between the moving frame and the direct-advance ring; and

a rotational control part provided on said moving frame to control rotation of said direct-advance ring relative to the moving frame.

6. The lens barrel according to claim 5,

wherein said moving frame is provided with a control part to control an amount of movement of the direct-advance ring relative to the moving frame in an optical direction.

7. The lens barrel according to claim 5,

wherein a predetermined pressure is imparted between the moving frame and the direct advance ring by the resilient member, and

wherein an outer diameter of the moving frame is set to be smaller than that of the direct-advance ring.

8. A lens barrel comprising:

a moving frame to hold a lens;

a direct-advance ring provided on an outer periphery of said moving frame and movable relative to said moving frame in an optical direction; and

a resilient member provided between the moving frame and the direct-advance ring,

said direct-advance ring including at least one shaft configured to engage with a cam frame to move the moving frame in an optical direction,

said moving frame including an engaging part with which the shaft is engaged,

wherein controls for movement in a rotational direction and for movement in the optical direction of the direct-advance ring relative to the moving frame are performed by means of the shaft and the engaging part.

9. The lens barrel according to claim 8,

wherein a predetermined pressure is imparted between the moving frame and the direct-advance ring by the resilient member.

10. A lens barrel comprising:

a moving frame to hold a lens; and

a direct-advance ring provided on an outer periphery of said moving frame and movable relative to said moving frame in an optical direction,

said direct-advance ring including at least one shaft configured to engage with a cam frame to move the moving frame in an optical direction,

said moving frame including an engaging part with which the shaft is engaged,

wherein controls for movement in a rotational direction and for movement in the optical direction of the direct-advance ring relative to the moving frame are performed by means of the shaft and the engaging part,

a resilient member being provided in a space along the optical direction between the engaging part and the shaft.

11. The lens barrel according to claim 10,

wherein a predetermined pressure is imparted between the moving frame and the direct-advance ring by the resilient member.

14. A lens barrel comprising:

a fixing frame fixed on a mounted part of a body of an optical device;

a mounting member projected from an outer peripheral surface of the fixing frame and fixed on said mounted part by a fastening member; and

a resilient member disposed in a space formed between the mounted part and the mounting member in a compressed state,

wherein the mounting member and the mounted part are configured not to contact directly in at least optical direction.

15. The lens barrel according to claim 14,

wherein said fastening member comprises a stepped screw, and

wherein said mounted part is formed with a stepped hole in which the stepped screw is fitted.

16. The lens barrel according to claim 14,

wherein said fixing frame is made of a resilient thermoplastic resin.

17. The lens barrel according to claim 16,

wherein said mounting member is integrally formed with the fixing frame made of the thermoplastic resin.

18. The lens barrel according to claim 14, including:

the fixing frame;

an exterior member engaged in a subject side of the fixing frame; and

a resilient member disposed between the fixing member and the exterior member.

19. An optical device comprising the lens barrel as recited in any one of claims 14 to 18.