JPS5892600A - Digital universal parallel rule combining display of clock - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital flexible parallel ruler that can display the time on the display section of the digital flexible parallel ruler configured to display a clock display using a changeover switch.

Due to the concentration required on design and drawing work, it is common to forget the time, and in such cases, it is convenient to display the time on the scale operating head using a changeover switch. In addition, in the case of a digital flexible parallel ruler, if the time display is also used as the scale movement and rotation angle display, the head can be made smaller, and the pulse generation circuit in the clock circuit can also be used to display the angle. It is convenient because it can be used in combination with

Therefore, the present invention aims to provide a digital flexible parallel ruler that can also be used as a clock display, in which the time can be displayed using a changeover switch on the display section that digitally displays the amount of movement and rotation angle of the scale. The present invention will be described in detail with reference to examples.
In Fig. 1, 1 is a head for operating the scale, and 2 is its support part, which is connected to a cursor board that moves along a vertical rail, and is configured to be guided as it moves on the drawing board. A head shaft is rotatably supported on the support part 2, and a handle 3 is attached to the upper end of the head shaft, and a scale support 4 is attached to the lower end of the head shaft, both of which are attached to the support part 2.
It is constructed so that it rotates integrally with respect to the main body. Reference numeral 5 denotes a scale weir attachment plate provided on the scale support 4, to which the scale 6 is attached. Reference numeral 7 denotes a protractor plate fixedly provided on the support part 2 side with respect to the scale support body 4, and has minute scales of 180 degrees clockwise and counterclockwise around the base point 0 degrees. The body 4 is provided with an indicator board 8 having indicators opposite to the minute scale. Normally, the indicator board 8 is provided with a vernier scale centered around the indicator, and is configured so that minute angles below the minimum scale of the minute scale can be read using the vernier scale.

The digital universal parallel ruler of the embodiment is configured so that the vernier reading angle based on the vernier scale is digitally read by an encoder and displayed on the display section 9 on the scale support 4. The encoder is built in the head 1, and is placed uniformly on the lower part of the protractor dial 7 with a 10 minute scale.
A slit protractor with slits extending over 360° at intervals is provided, while a scale support 4 overlapping the slit protractor is provided with a slit for said slit according to the vernier principle, e.g. 2°50 for lO' interval readings. A vernier slit disk having vernier slits at intervals is provided, and a phototransistor is provided corresponding to each vernier slit to detect the overlapping of the slits. 9. The slit protractor has a notch corresponding to the θ° slit and the minute scale to the 180° slit degree scale, and the arc length of the 0' vernier slit corresponds to this. A transistor detects the presence or absence of a notch,
It is configured to determine the direction of rotation around 06 of the scale. Therefore, if the interval between the vernier slits is set to 2°50', for example, the vernier slit reading 10' is 2°50', and the vernier slit reading 10' is 5°4.
0', (capital)' reading vernier slit is 8°30', chrysanthemum' reading bar 'r s! J y ) Ka11'20',
(Capital) 'Reading vernia slit is 14°10' and θ respectively
Since it is separated from the vernier slit, for example, if you rotate it 10' in the plus direction (counterclockwise), it will read 10'.
When the reading slit matches the 3° slit on the slit protractor and rotates 10' in the negative direction (clockwise), the slit vernier slit aligns with the 14° slit on the slit protractor. Only the phototransistors corresponding to the vernier slits that matched the slits on the slit protractor board received the light from the light-emitting elements arranged in phase to generate a photocurrent, and the ones corresponding to the other vernier slits received the light. Instead, only dark current flows.

In Figure 2, 10 is a vernier circuit, 11 is 0'~
12 is a phototransistor installed corresponding to each vernier slit, 13, 14 is installed corresponding to the slit for polarity determination.
is a Schmitt circuit connected to each phototransistor, and the output signal of each Schmitt circuit is sent to a multiplexer.
15 is input. In the multiplexer 15,
For example, the output signal of the Schmitt circuit 14 for polarity determination is +
When it is in the (plus) direction, it is Lebel, and when it is in the (minus) direction, it is 0 level, and when it is Lebel, the multiplexer is -1.
The signal at the foot of x, y, z is selected as the output signal of 5, and the output signal of 0
The J462 signal is selected when the signal is at the level, and the selected x, y, and z output signals are converted into a binary code by the encoder 16 and input to the vernier/clock switching multiplexer circuit 17. Ru. Vernier
The clock switching multiplexer circuit is connected to the minute block 17.
m, 10 minute block 17b1 hour block 17
e and 10 o'clock time blocks 17d, and the binary code output signal from the encoder 16 is configured to be input to the 10 minute unit block 17b. and,
The configuration is such that the signals from the vernier circuit 1310 to the other blocks 17m, 17c, and 17d are closed, and in this case, a 0 display is made. Therefore, even if the encoder 16 is not provided with an output circuit corresponding to θ', the block 17b is displayed as 0 as a cold output signal.

On the other hand, + is a clock circuit, and 4 is a pulse generation circuit that oscillates a precise frequency using a crystal oscillator, etc. The reference pulse output from the 0 pulse generation circuit 21 is the second pulse output frequency divided -
The frequency is divided into second pulses by the path n, which are sequentially divided by ÷
The frequency is divided into minutes, lO minutes, and hours by the ω frequency divider circuit, the ÷10 frequency divider circuit 6, and the ÷6 frequency divider circuit 6, and the output signals are sent to the minute unit plotter 17m and the 10 minute unit block 17b1. It is input to the time unit block 17e and the 10 o'clock time block 17d.

Then, the hour pulse is detected by the 12 o'clock or 2 o'clock detection circuit n, and the 12 o'clock time pulse or the 12 o'clock hour pulse or U
The clock pulse is output from the detection circuit n to the reset circuit a, and the output from the clock circuit is reset to all zeros.

Here, the vernier/clock switching multiplexer circuit 1
7 inputs the output signal of the vernier circuit 1O or the clock circuit I to the liquid crystal drive circuit 19 by switching with the vernier/clock/changeover switch 18. The liquid crystal drive circuit 19 receives a pulse signal from the pulse generation circuit 21 and dynamically drives the liquid crystal display element check.
The display unit 9 of the head 1 is configured to display the vernier angle or time. In addition, in Fig. 1, the west side is the switch button for the clock driver, the power switch, etc., and 31
This is a warning window in case the clock has an alarm function.

As described above, according to the digital flexible parallel ruler that can also be used as a clock according to the present invention, the time can be displayed arbitrarily on the display section of the head that displays the amount of movement of the scale, etc. using the vernier/clock changeover switch. , there is no risk of forgetting the time during design and drawing work, the head can be made smaller by sharing the display, and the circuit has common parts, which has the effect of achieving a rational circuit configuration. Some 0

[Brief explanation of drawings]

FIG. 1 is a plan view showing the main parts of an embodiment of the present invention, and FIG. 2 is a circuit diagram of the main parts.

Claims (1)

[Claims] A digital flexible parallel ruler that digitally displays the amount of movement or rotation angle of the scale on the display section of the scale operation head based on the count signal of the encoder.A clock circuit is also installed, and the time can be displayed on the display section using a switch. A digital flexible parallel ruler that can also be used as a clock display.