JPS5845098U

JPS5845098U - Drafting head minute match display device

Info

Publication number: JPS5845098U
Application number: JP13929781U
Authority: JP
Inventors: 斎藤　義明; 山口　正勝
Original assignee: マックス株式会社
Priority date: 1981-09-19
Filing date: 1981-09-19
Publication date: 1983-03-26
Also published as: JPH0440957Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案の一実施例に係る製図ヘッドの分単位−
数表示装置を具える製図ヘッドの平面図、第２図は上記
製図ヘッドの一部破断面図、第３図は上記製図ヘッドの
分単位−数表示装置における光学的符号化ディスク及び
支持用スリット板の平面図、第４図は光学的符号化ディ
スク及び支持用スリット板に対する角度検出器及び零位
置検出器の位置関係を示す断面図、第５図は本考案の一
実施例に係る分単位−数表示電子回路の回路図、第６図
はレベル弁別回路の出力端子における波形図、第７図は
上記分単位−数表示電子回路の主要各部におけるタイム
チャニド、第８図は上記製図ヘッドの分単位−数表示装
置における温度補償方法の　　′概要を説明する線図、
第９図は他の実施例に係る分単位−数表示電子回路の判
別回路のみを示した回路図である。１・・・・・・製図ヘッドの分単位表示装置、２・・・
・・・製図ヘッド、５・・・・・・製図ヘッド基板、７
・・・・・・水平スケール、１２・・・・・・分度盤、
１４・・・・・・光学的符号化ディスク、２１・・・・
・・第１角度検出器、２２・・・・・・第２角度検出器
、２３・・・・・・第３角度検出器、２４・・・・・・
第４角度検出器、２５・・・・・・零位置検出器、２６
゜２７ａ、２７ｂ、２８ａ、２８ｂ、２９ａ、２９ｂ。３０ａ、３０ｂ、３１ａ、３１ｂ、３２ａ、３２ｂ。３３ａ、３３ｂ、３４ａ、３４ｂ、３５ａ、３５ｂ。３６ａ、３６ｂ、３７ａ及び３７ｂ−−−−−−一致表
示用素子ダイオード、３８ａ・・・・・・バーニア、４
０・・・・・・分単位−数表示電子回路、１９３・・・
・・・判別回路。１９６−−ｊｌｉ１０　５１０　７５　・第６図　　　　。Figure 1 shows the minute unit of a drafting head according to an embodiment of the present invention.
FIG. 2 is a partially cutaway cross-sectional view of the drafting head; FIG. 3 is a plan view of the drafting head equipped with a number display; FIG. FIG. 4 is a plan view of the plate, FIG. 4 is a sectional view showing the positional relationship of the angle detector and zero position detector with respect to the optical encoding disk and the supporting slit plate, and FIG. 5 is a minute unit diagram according to an embodiment of the present invention. - A circuit diagram of the number display electronic circuit, Fig. 6 is a waveform diagram at the output terminal of the level discriminator circuit, Fig. 7 is the above-mentioned minute unit - Time channels in each main part of the number display electronic circuit, and Fig. 8 is a diagram of the above-mentioned drawing head. Diagram outlining the method of temperature compensation in unit-number display devices,
FIG. 9 is a circuit diagram showing only the discrimination circuit of the minute unit/number display electronic circuit according to another embodiment. 1... Minute unit display device of drafting head, 2...
... Drafting head, 5 ... Drafting head board, 7
...Horizontal scale, 12...Protractor board,
14... optically encoded disc, 21...
...First angle detector, 22...Second angle detector, 23...Third angle detector, 24...
Fourth angle detector, 25... Zero position detector, 26
゜27a, 27b, 28a, 28b, 29a, 29b. 30a, 30b, 31a, 31b, 32a, 32b. 33a, 33b, 34a, 34b, 35a, 35b. 36a, 36b, 37a and 37b --- Element diode for coincidence display, 38a... Vernier, 4
0... Minute unit - number display electronic circuit, 193...
...Discrimination circuit. 196--jli1 0 510 75 ・Figure 6.

Claims

[Scope of utility model registration request]

Zero in both counterclockwise and clockwise directions from the zero position
A protractor with an angle scale in degrees from 180 degrees to 180 degrees, a drafting head board with a water scale and rotatable in the counterclockwise or clockwise direction of the angle scale of the protractor; A fixed encoded disc and a vernier 6 with minute scales from 0 to 60 minutes both counterclockwise and clockwise from the zero position, aligned parallel to the minute scale of the vernier. By moving along the display element and the encoding disk, the signal level changes repeatedly in a sinusoidal manner with one period as one degree, and outputs an angle detection signal having a phase difference of % period from each other. the first and second angle detectors, and the third angle detector that outputs angle detection signals with appropriate phase differences to the first and second angle detectors, respectively.
and a fourth angle detector, a zero position detector that detects the zero position of the protractor by moving along the encoded disk and outputs a zero position detection signal, and a zero position detector that outputs a zero position detection signal by moving along the encoded disk, and a zero position detector that outputs a zero position detection signal, and a level sensor that outputs a zero position detection signal by moving along the encoded disk. a level discrimination circuit for discriminating, a circuit for controlling the operation and non-operation of the coincidence display element based on the level-discriminated angle detection signal, and a circuit for controlling the operation and non-operation of the coincidence display element based on the level-discriminated angle detection signal; A minute unit/number display device for a drafting head, comprising a discrimination circuit for determining whether a certain coincidence display element is activated.