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JPS5612606A - Cam member of lens barrel - Google Patents

Cam member of lens barrel

Info

Publication number
JPS5612606A
JPS5612606A JP8911879A JP8911879A JPS5612606A JP S5612606 A JPS5612606 A JP S5612606A JP 8911879 A JP8911879 A JP 8911879A JP 8911879 A JP8911879 A JP 8911879A JP S5612606 A JPS5612606 A JP S5612606A
Authority
JP
Japan
Prior art keywords
cam
cam member
cylindrical part
inexpensive
metals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP8911879A
Other languages
Japanese (ja)
Other versions
JPH0231363B2 (en
Inventor
Akiyasu Washimi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP8911879A priority Critical patent/JPH0231363B2/en
Priority to US06/166,825 priority patent/US4386829A/en
Priority to DE3026188A priority patent/DE3026188A1/en
Publication of JPS5612606A publication Critical patent/JPS5612606A/en
Publication of JPH0231363B2 publication Critical patent/JPH0231363B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Lens Barrels (AREA)

Abstract

PURPOSE: To obtain a cam member which has less degradation in accuracy due to environmental changes, retains mechanical strength sufficiently and is inexpensive by forming the cam portion of the cam member protrusively from the inside circumferential surface of the cam member and forming the cam portion by a material different from that of other portions.
CONSTITUTION: A zoom ring part 6 comprises e.g. a metal cylindrical part and its cylindrical inner side is integrally formed with a cam part 6a comprizing a synthetic resin of a projection shape and a protecting wall surface. In order to increase the binding strength of both, a plurality of reinforcing bosses such as e.g. 6c are used. The material of the cylindrical part is not limited to metals; it is possible to use e.g. synthetic resins of low coefficients of thermal expansion; moreover, the boss parts are note solely confined to the shape shown in particular. With this arrangement, the changes of temperature, humidity, etc. are slight and the cam of correspondingly good accuracy is obtained. Besides, if the outside cylindrical part is made of metals or synthetic resins, mechanical strength may be sufficiently taken, and the shape is nevertheless simple, hence, the cam is inexpensive.
COPYRIGHT: (C)1981,JPO&Japio
JP8911879A 1979-07-13 1979-07-13 RENZUKYOTONOIDOKIKO Expired - Lifetime JPH0231363B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP8911879A JPH0231363B2 (en) 1979-07-13 1979-07-13 RENZUKYOTONOIDOKIKO
US06/166,825 US4386829A (en) 1979-07-13 1980-07-08 Mechanical mounting system for a zoom lens assembly
DE3026188A DE3026188A1 (en) 1979-07-13 1980-07-10 MECHANICAL VERSION FOR A ZOOM LENS COMPOSITION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8911879A JPH0231363B2 (en) 1979-07-13 1979-07-13 RENZUKYOTONOIDOKIKO

Publications (2)

Publication Number Publication Date
JPS5612606A true JPS5612606A (en) 1981-02-07
JPH0231363B2 JPH0231363B2 (en) 1990-07-12

Family

ID=13961969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8911879A Expired - Lifetime JPH0231363B2 (en) 1979-07-13 1979-07-13 RENZUKYOTONOIDOKIKO

Country Status (1)

Country Link
JP (1) JPH0231363B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597319A (en) * 1982-07-05 1984-01-14 Hitachi Ltd Cam follower for zoom lens
US4460245A (en) * 1980-12-18 1984-07-17 Canon Kabushiki Kaisha Lens mounting

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04113369U (en) * 1991-03-22 1992-10-02 イーグル工業株式会社 double gasket

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460245A (en) * 1980-12-18 1984-07-17 Canon Kabushiki Kaisha Lens mounting
JPS597319A (en) * 1982-07-05 1984-01-14 Hitachi Ltd Cam follower for zoom lens

Also Published As

Publication number Publication date
JPH0231363B2 (en) 1990-07-12

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