JPS569710A - Helicoid member for lens in optical apparatus - Google Patents

Helicoid member for lens in optical apparatus

Info

Publication number
JPS569710A
JPS569710A JP8517479A JP8517479A JPS569710A JP S569710 A JPS569710 A JP S569710A JP 8517479 A JP8517479 A JP 8517479A JP 8517479 A JP8517479 A JP 8517479A JP S569710 A JPS569710 A JP S569710A
Authority
JP
Japan
Prior art keywords
helicoid
portions
lens
prevent
screw thread
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.)
Pending
Application number
JP8517479A
Other languages
Japanese (ja)
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 JP8517479A priority Critical patent/JPS569710A/en
Publication of JPS569710A publication Critical patent/JPS569710A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lens Barrels (AREA)

Abstract

PURPOSE: To provide a good and inexpensive helicoid by manufacturing a helicoid member for lens by a plastic member and changing screw threads by providing the portions absorbing dimensional errors to the effective screwing portions of the helicoid.
CONSTITUTION: A helicoid is so constituted by minutely changing part (a) of its pitch that the space of the part (a) differs from that of the other portions. It is equally well to let the leas angle of the part (b) differ from that of the other portions by minutely changing part of the lead angle of the helicoid. It is also equally well to change the shape of the screw thread of the part (c) by letting the shape of the screw thread of the helicoid differ partly from that of the other portions. All these constitutions not only prevent the helicoid from clattering but also prevent the formation of any oil wells in the helicoid and the unsmooth operation owing to oil starving of the helicoid.
COPYRIGHT: (C)1981,JPO&Japio
JP8517479A 1979-07-05 1979-07-05 Helicoid member for lens in optical apparatus Pending JPS569710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8517479A JPS569710A (en) 1979-07-05 1979-07-05 Helicoid member for lens in optical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8517479A JPS569710A (en) 1979-07-05 1979-07-05 Helicoid member for lens in optical apparatus

Publications (1)

Publication Number Publication Date
JPS569710A true JPS569710A (en) 1981-01-31

Family

ID=13851287

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8517479A Pending JPS569710A (en) 1979-07-05 1979-07-05 Helicoid member for lens in optical apparatus

Country Status (1)

Country Link
JP (1) JPS569710A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57210306A (en) * 1981-06-20 1982-12-23 Olympus Optical Co Ltd Helicoid member for lens
JPS57210305A (en) * 1981-06-20 1982-12-23 Olympus Optical Co Ltd Helicoid member for lens
JPS57210304A (en) * 1981-06-20 1982-12-23 Olympus Optical Co Ltd Helicoid member for lens
JPS58186707A (en) * 1982-04-26 1983-10-31 Hitachi Ltd Plastic lens barrel for optical equipment
JPS6084514A (en) * 1983-10-15 1985-05-13 Olympus Optical Co Ltd Helicoid device of lens barrel
DE3437345A1 (en) * 1983-10-13 1985-05-15 Canon K.K., Tokio/Tokyo HELICOID MECHANISM
JPS6289921A (en) * 1986-07-16 1987-04-24 Olympus Optical Co Ltd Helicoid member for lens

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57210306A (en) * 1981-06-20 1982-12-23 Olympus Optical Co Ltd Helicoid member for lens
JPS57210305A (en) * 1981-06-20 1982-12-23 Olympus Optical Co Ltd Helicoid member for lens
JPS57210304A (en) * 1981-06-20 1982-12-23 Olympus Optical Co Ltd Helicoid member for lens
JPS58186707A (en) * 1982-04-26 1983-10-31 Hitachi Ltd Plastic lens barrel for optical equipment
DE3437345A1 (en) * 1983-10-13 1985-05-15 Canon K.K., Tokio/Tokyo HELICOID MECHANISM
US4582350A (en) * 1983-10-13 1986-04-15 Canon Kabushiki Kaisha Helically threaded mechanism
DE3437345C2 (en) * 1983-10-13 1989-04-06 Canon K.K., Tokio/Tokyo, Jp
JPS6084514A (en) * 1983-10-15 1985-05-13 Olympus Optical Co Ltd Helicoid device of lens barrel
JPS6289921A (en) * 1986-07-16 1987-04-24 Olympus Optical Co Ltd Helicoid member for lens

Similar Documents

Publication Publication Date Title
ATE21734T1 (en) SCREW.
DE3268704D1 (en) Device for manufacturing a cylindrical element with helical grooves, especially for optical fibres
DE3586178D1 (en) POWER TRANSMISSION SYSTEM.
IE45762L (en) Screw pipe joint
ATE35029T1 (en) CONNECTING ELEMENT FOR TWO MACHINE PARTS OR COMPONENTS, SUCH AS FITTING EXPANSION THREADED BOLT.
DE58905785D1 (en) GAS FRICTION PUMP WITH AT LEAST ONE OUTLET THREAD LEVEL.
DE3317519A1 (en) Light-collecting plate
ATE33176T1 (en) DEVICE FOR LIMITING THE ANGLE OF ROTATION IN SCREW GEARS AND THE USE OF SAME.
IT7921232U1 (en) SCREW STRUCTURE WITH DOUBLE-START THREAD.
EP0525315A1 (en) Binoculars
KR920003076A (en) Optics
DE3119498A1 (en) Lens
JPS5428132A (en) Lens mounting
JPS5279163A (en) Screw joint which is excellent in fatigue characteristics
JPS57210306A (en) Helicoid member for lens
SU1581941A1 (en) Ball screw gearing
SU991106A1 (en) Adjustable throttle
SU709895A2 (en) Screw-type adjustable throttle
DE69113600D1 (en) Screw adjustment device with a recessed swiveling core.
JPS57210304A (en) Helicoid member for lens
SU399047A1 (en) SETUP SCREW
SU1714685A1 (en) Device for adjustment of sensor with step-like hole in respect to spherical focal surface
SU823076A1 (en) Apparatus for indexing cylindrical parts
DE202022101646U1 (en) Vehicle warning light
JPS5740115A (en) Secured shaft