JPH0142003Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a scale that measures the length of a straight line, curved line, etc. while drawing it with a writing instrument, and digitally displays the measured value.

Generally, when drawing a straight line of a predetermined length, a so-called ruler is used, and the writing instrument is moved according to the scale of the ruler, but if there is a curved part or undulation in the vertical direction, the length is measured. I can't draw while doing so.

As a device for measuring length on a flat surface, a pulse generator converts the amount of rotation of a rotating roller that rotates in contact with the object to be measured into pulses, the pulses are measured and integrated by a counter, and this is digitally displayed on the display. However, the present invention incorporates such a mechanism into the main body of a pencil-type measuring instrument, and also enables the user to draw a line with a writing instrument, and simultaneously calculates the length of the line. The present invention provides a scale that can measure and display digitally.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below based on drawings that are embodiments thereof.

In the figure, 1 indicates a pencil-type measuring instrument body, 2 a roller that rotates while contacting the object to be measured 3, and 4
is an amplifying means for amplifying the rotation amount of the roller, and in the embodiment, a gear group 5 is used, and the gear ratio is such that the rotation ratio is amplified to about 1:10. Reference numeral 6 denotes a pulse generator connected after the amplifying means to convert the amount of rotation thereof into pulses; in the embodiment shown in FIG. 1, the magnet 8 is connected to the rotating body 7 rotated by the amplifying means A reed relay 9 is installed adjacent to the reed relay 9, and in the one shown in FIG. and the light receiver 12 are opposed to each other, so that the amount of rotation thereof can be detected.

The pulses generated in the pulse generating section 6 in this manner are input to the counter section 13, which includes a pulse counter 14, an integrating section 15, and a digitizing section 16.
After that, the amount of rotation is displayed on the LCD 17.
Reference numeral 18 is a switching circuit for changing or resetting the conversion route from the number of pulses to the displayed number in the integrating section 15, and the switching circuit 18 can be operated by operating the switch 19 provided on the surface of the main body 1 of the measuring instrument. Changes can be made.

Each of the above-mentioned components is built into the measuring device body 1, and the amount of rotation of the roller 2 can be amplified and detected, allowing accurate measurement and the distance traveled by the roller 2 to be displayed digitally. For,
Accurate measurement is possible even on curved parts or objects with vertical undulations.

The measuring instrument main body 1 is shaped like a pencil, and as shown in FIG. 4, an attachment 20 capable of holding a writing instrument 19 is attached to the lower part of the measuring instrument main body 1. This attachment 20
is biased in the vertical direction by a spring, and when drawing a line, if you hold the scale body 1 and press it against paper etc., the tip of the writing instrument 19 will be pushed back by the paper surface,
Lines can be drawn using the appropriate pen pressure, and the length of the line is immediately displayed digitally. Above attachment 2
A needle-like pointer can also be attached to the 0.
In this case, alignment with the object to be measured becomes easy, and accuracy can be further improved.

According to the scale according to the present invention, a rotating roller, a gear group, a pulse generating section, a counter section, and a digital display section are incorporated into a pencil-shaped measuring device body, and the amount of rotation of the roller can be digitally displayed. However, since the measuring instrument itself has an attachment to hold the writing instrument, it is possible to measure and digitally display the length of a straight line or curve while drawing a straight line or curve with the writing instrument. Since it is biased downward so that appropriate writing pressure can be obtained, it is possible to draw a line while ensuring that the rotating roller is in contact with the surface to be measured.

[Brief explanation of the drawing]

The drawings show an embodiment of the scale according to the present invention,
Fig. 1 is a partially cutaway side view, Fig. 2 is a block diagram showing the internal circuit, Fig. 3 is a perspective view showing another embodiment of the pulse generator, and Fig. 4 is a perspective view showing the attachment state. It is a diagram. 1: Measuring instrument body, 2: Roller, 3: Object to be measured, 4: Amplifying means, 5: Gear group, 6: Pulse generator, 9: Reed relay, 13: Counter, 1
7: Digital display section, 19: Writing instrument, 20: Attachment.

Claims (1)

[Claims for Utility Model Registration] Amplifying the amount of rotation of a rotating roller that rotates in contact with an object to be measured, converting the amount of rotation into pulses in a pulse generator, and measuring and integrating the pulses in a counter. In a measuring device having a digital display unit, the rotating roller, a gear group for amplifying the amount of rotation of the rotating roller, the pulse generating unit, the counter unit, and the display unit are incorporated into a pencil-shaped measuring instrument body. An attachment for holding and holding a writing instrument is attached to the side of the measuring instrument body in a state biased downward by a spring, and the length can be measured while drawing a line with the writing instrument. A scale characterized by being configured as follows.