JPH0479313U

JPH0479313U -

Info

Publication number: JPH0479313U
Application number: JP12256690U
Authority: JP
Priority date: 1990-11-22
Filing date: 1990-11-22
Publication date: 1992-07-10

Description

[Brief explanation of the drawing]

第１図は、この考案に係るズーム倍率検出装置
の全体構成を示すブロツク図、第２図は、同実施
例に使用されるズーム倍率検出板の平面図、第３
図は、同ズーム倍率検出板と固定抵抗群との接続
部分を示す回路図、第４図は、同実施例のズーム
検出装置の構成を示す斜視図、第５図は、第２図
のズーム倍率検出板の各検出区間の出力電圧を示
す説明図、第６図は、第３図のズーム倍率検出板
の回路図の等価回路図、第７図は、この考案に係
る焦点距離検出装置に適用されるズーム検出装置
の他の実施例の平面図である。１……ズーム位置検出部、２……ズーム倍率検
出板、２ａ〜２ｅ……導体パターン、３ａ〜３ｅ
……摺動子、４……ズーム鏡胴、５……ズームモ
ータ、６……Ａ／Ｄ変換部、７……ズーム演算部
、８……表示装置、９……制御部、１０……モー
タドライバ、１００〜１１５……検出区分、ａ〜
ｅ……端子、Ｒ_０……抵抗器、Ｒ_１〜Ｒ_４……固
定抵抗、ＳＷ_１〜ＳＷ_４……スイツチ。 FIG. 1 is a block diagram showing the overall configuration of a zoom magnification detection device according to this invention, FIG. 2 is a plan view of a zoom magnification detection plate used in the same embodiment, and FIG.
The figure is a circuit diagram showing the connecting part between the zoom magnification detection plate and the fixed resistor group, FIG. 4 is a perspective view showing the configuration of the zoom detection device of the same embodiment, and FIG. 5 is the zoom An explanatory diagram showing the output voltage of each detection section of the magnification detection plate, Fig. 6 is an equivalent circuit diagram of the zoom magnification detection plate circuit diagram of Fig. 3, and Fig. 7 is an explanatory diagram showing the output voltage of each detection section of the magnification detection plate. FIG. 7 is a plan view of another embodiment of the applied zoom detection device. DESCRIPTION OF SYMBOLS 1...Zoom position detection part, 2...Zoom magnification detection plate, 2a-2e...Conductor pattern, 3a-3e
... Slider, 4 ... Zoom lens barrel, 5 ... Zoom motor, 6 ... A/D conversion section, 7 ... Zoom calculation section, 8 ... Display device, 9 ... Control section, 10 ... Motor driver, 100-115...Detection classification, a-
e...terminal, _R0 ...resistor, _R1 to _R4 ...fixed resistance, _SW1 to _SW4 ...switch.

Claims

[Scope of utility model registration request]

A plurality of switch patterns arranged on a board formed into a predetermined shape, and a fixed resistor that is connected to one end of each of these switch patterns and is composed of a plurality of resistors having different resistance values, and the other ends are connected in common. a plurality of sliders that are interlocked with the zoom lens barrel of the zoom lens driven by the driving means and that are brought into individual contact and non-contact states with the switch pattern depending on the interlocking position, and the fixed resistor. connected between each other end of the group and the power supply,
and a resistor for extracting a voltage corresponding to the sliding position of each slider with respect to the switch pattern from the connection point with each other end, and an analog/digital converter for digitizing the voltage generated at the connection point. 1. A zoom magnification detection device comprising: a zoom magnification detector; and an arithmetic unit that calculates the zoom magnification of the zoom lens from the output of the analog/digital converter.