JP2000141988A - Drawing device of ellipse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove such defects of a usual drawing device of an ellipse having grooves formed in rods or a base in two directions intersecting perpendicularly each other that the movement of the device at a point of intersection of the grooves is not smooth and that drawing in a part obstructed by the base is impossible. SOLUTION: At the time when an extension-contraction guiding implement 2 goes and returns one time along a groove of a base rod 1, conducting the extraction and contraction of the base rod 1, a rotating rod 5 moving in linkage to a drawing rod 4 which moves with the movement of the guiding implement and to which a drawing implement 10 is fitted is made to rotate one time around a rotating rod support 6 fitted to the lower part of the base rod 1 and thereby the drawing implement 10 is made to draw a desired ellipse.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating rod, which moves in conjunction with a drawing rod attached with a painter, when a telescopic guiding tool reciprocates in a groove of the basic rod while controlling expansion and contraction of the basic rod. Is rotated once around a rotating rod support attached to the lower part of a basic rod, and an ellipse is drawn on the painter.

[0002]

2. Description of the Related Art Heretofore, elliptical plotters have been provided with elliptical plotters having grooves on a bar or a base in two fixed directions perpendicular to each other.

[0003]

This has the following disadvantages. It had grooves in the rod or base in two directions perpendicular to each other, and the movement of the device at the intersection was not smooth, and drawing of the part obstructed by the base was impossible. The present invention has been made to eliminate these disadvantages.

[0004]

Means for Solving the Problems When the telescopic guide (2) moves in the groove on the upper part of the basic rod (1), the members that move with it do not hinder the movement of the other members. The following measures were taken. Handle (3) for telescopic guide (2)
And a drawing rod support (8) for supporting the drawing rod (4) directly below the connecting rod (7) for connecting the telescopic guide (2) and the drawing rod (4) to a U-shape. did. Also, the connecting tool (7) has a straight line connecting the handle (3) and the drawing rod support (8) on the rotation axis, so that the connecting tool (7), the drawing rod (4) and the basic rod (1). Can move without being disturbed by each other. In addition to the drawing bar (4) moving under the rotating bar (5), the paint (10) came to be directly below the basic bar (1), and the closed ellipse became cat-like.
Regarding the relationship between the rotating bar (5) and the connecting member (7), the length of the U-shaped horizontal portion of the connecting member (7) is set so as not to hinder each other even when a small ellipse is drawn. (5)
More than half of the length.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below. (1) is a tube or rod that has a groove at the top and can expand and contract, and is a basic rod. Reference numeral (2) denotes a telescopic guide that controls the expansion and contraction of the basic rod (1) and moves in the groove of the basic rod (1), and has a handle (3).
(4) is a drawing bar, and (5) is a rotating bar, each having a groove required for coupling with another member. The rotating rod (5) is rotatably supported by a rotating rod support (6) attached to the lower part of the basic rod (1). (7) is a connecting tool for connecting the drawing bar (4) to the guiding tool (2), the length of the horizontal portion of the U-shape being at least half the length of the rotating bar (5). Reference numeral (8) denotes a drawing rod support for connecting and supporting the drawing rod (4) with the connecting tool (7). In addition, the connecting tool (7) has a straight line connecting the handle (3) and the drawing rod support (8) on the rotation axis. (9) The distance between the rotary rod support (6) in the rotary rod (5) and the distance from the drawing rod support (8) in the drawing rod (4) is made equal, and the rotary rod ( 5) and the drawing bar (4) are vertically connected couplers, and serve as rotation axes of the rotating bar (5) and the drawing bar (4). (1
Reference numeral 0) denotes an painting tool attached to the drawing stick (4). Therefore,
Since the present device has the above-described configuration, after determining the attachment positions of the coupling tool (9) and the painting tool (10), the telescopic guiding tool (2) is reciprocated once with the basic rod (1), and at the same time, the rotating rod is rotated. When (5) is rotated once around the rotating rod support (6), an ellipse is obtained as a trajectory of both tools (10). (6)
When the distance between (9) and (9) is c and the distance between (9) and (10) is d, the following ellipse centered on the point (6) is drawn. * When (10) is located on the opposite side to (8) with respect to (9), the major axis is 2 × (c + d) and the minor axis is 2 × | c−
d | is vertical, {the minor axis is parallel to (1)}. * When (10) is located between (8) and (9),
Horizontally long with a major axis of 2 × (c + d) and a minor axis of 2 × (cd), {major axis parallel to (1)}. * When (10) is located on the opposite side to (9) with respect to (8), the major axis is 2 × (c + d) and the minor axis is 2 × (d−
c) becomes a horizontally long ellipse.

[0006]

Since the present invention is an apparatus as described above, an ellipse can be drawn by attaching a pencil, a pen, a chalk or the like to the paint (10). Further, it can be used for shaping and polishing of an ellipsoid using the movement of the paint tool (10), so that it has a great educational and industrial utility.

[Brief description of the drawings]

FIG. 1 is a perspective view of the device.

[Explanation of symbols]

1 is a basic rod, 2 is a telescopic guide, 3 is a handle, 4 is a drawing rod, 5 is a rotating rod, 6 is a rotating rod support, 7 is a coupling tool, 8 is a drawing rod support 9 is a coupling tool, 10 is Painter.

Claims (1)

[Claims] 1. A drawing stick with an painting tool (10) attached thereto, which moves when the telescopic guide (2) reciprocates in the groove of the basic rod (1) while controlling the expansion and contraction of the basic rod (1). (4)
A rotating rod (5) interlocking with the basic rod (1) is rotated once around a rotating rod support (6) attached to the lower part of the basic rod (1) to draw an ellipse on the painter (10).