JPS5448531A - Preventing device for malfunction in camera with autowatic focus control device - Google Patents

Preventing device for malfunction in camera with autowatic focus control device

Info

Publication number
JPS5448531A
JPS5448531A JP10643577A JP10643577A JPS5448531A JP S5448531 A JPS5448531 A JP S5448531A JP 10643577 A JP10643577 A JP 10643577A JP 10643577 A JP10643577 A JP 10643577A JP S5448531 A JPS5448531 A JP S5448531A
Authority
JP
Japan
Prior art keywords
operating switch
malfunction
maximum value
plunged
input terminal
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
JP10643577A
Other languages
Japanese (ja)
Other versions
JPS5917402B2 (en
Inventor
Haruhiko Momose
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP10643577A priority Critical patent/JPS5917402B2/en
Publication of JPS5448531A publication Critical patent/JPS5448531A/en
Publication of JPS5917402B2 publication Critical patent/JPS5917402B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To prevent the malfunction due to the switching action of an operating switch by connecting one input terminal of a maximum value detector with the net of the operating switch at least via delay capacitor.
CONSTITUTION: In case the main subject does not make a clear and distinct contrast to its field, for example, in case the landscape, etc. in the infinite distance is photographed, a trouble, such as, that scanning control plate 14 is made to stop in the finite distance by the electric current fluctuation phenomenon, etc. in the circuit produced when operating switch SW is plunged happens. The above electric current fluctuation phenomenon, etc. produced when the operating switch SW is plunged is utilized for the purpose of lowering photoelectric signal VCO by connecting one input terminal of maximum value detector 8 with the network of the operating switch SW via at least delay capacitor C3, and concurrently, digital signal VAF from A-D converter 9 is applied to maximum value detecton circuit, thus the malfunction can be prevented by setting the subsequent comparation signal VDT to be a much hihger value
COPYRIGHT: (C)1979,JPO&Japio
JP10643577A 1977-09-05 1977-09-05 Malfunction prevention device for cameras equipped with automatic focus adjustment device Expired JPS5917402B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10643577A JPS5917402B2 (en) 1977-09-05 1977-09-05 Malfunction prevention device for cameras equipped with automatic focus adjustment device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10643577A JPS5917402B2 (en) 1977-09-05 1977-09-05 Malfunction prevention device for cameras equipped with automatic focus adjustment device

Publications (2)

Publication Number Publication Date
JPS5448531A true JPS5448531A (en) 1979-04-17
JPS5917402B2 JPS5917402B2 (en) 1984-04-21

Family

ID=14433560

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10643577A Expired JPS5917402B2 (en) 1977-09-05 1977-09-05 Malfunction prevention device for cameras equipped with automatic focus adjustment device

Country Status (1)

Country Link
JP (1) JPS5917402B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0538323Y2 (en) * 1990-02-07 1993-09-28

Also Published As

Publication number Publication date
JPS5917402B2 (en) 1984-04-21

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