KR200298258Y1 - A Dotted Circle Drawing Compasses - Google Patents

Abstract

The present invention relates to a compass that draws a dotted circle at a time by pressing the compass by hand while removing the inconvenience of drawing a circle by turning the compass by hand when drawing a circle with a dotted line. Until now, when drawing a circle with a dotted line, I grabbed the head of the compass and drew one point at a time, but I couldn't draw too much because the angle of the legs could be loosened, so the center part was shaken and my fingers were twisted. To solve this drawback and to draw an easy, accurate dotted circle, press the cover with your thumb and lift the handle up to rotate it by the female screw of the handle and the male screw of the central shaft, and the gear installed on the central shaft rotates to rotate the interlocking small gear. The dashed circle compass is designed to draw a dashed circle by the piston movement which converts the movement into the vertical movement.

Description

Dotted Circle Drawing Compasses

The compass is a device designed to draw a circle through a writing instrument inserted into the rotating shaft by the rotation axis around the central axis with a radius between the central axis and the rotating shaft. There is no separate device for drawing dashed circles, and until now, when drawing a circle with a compass, the compass has been rotated by taking a single point. However, this method is too difficult to slip the central axis is a lot of angles, and when you hold the compass head with your fingers, it is difficult to turn one wheel at a time, so it is difficult to turn the ground.

The purpose of the present invention is to convert the conventional tricky way to draw a dotted circle, simply press the head with the thumb and raise the handle, and the compass can be rotated around the circle. It is to make a dotted circle compass.

1 is an overall perspective view of a dotted circle compass

Figure 2 is an internal view of the central axis and the up and down reciprocating device

3 is a right side perspective view

4 is an enlarged view of a connection portion;

* Explanation of symbols for main parts of the drawings

A: Fixed shaft B: Up and down reciprocating device C: Left and right moving device D: Recording device

1: cover 2: handle 3: elastomer 4: central axis

4c: center shaft gear 6: small gear 11: rotating shaft 12: moving shaft

14: writing instrument rack

In the present invention, as shown in Fig. 1, the compass is divided into four parts: a fixed shaft (a), a vertical reciprocating device (b), a left and right moving device (c), and a recording device (d).

The fixed shaft (A) can be divided into five parts: the cover (1), the handle (2), the elastic device (3), the central shaft body (4) and the pin (5).

Press the cover (1) with your thumb and hold the handle with your hand to lift it up and the inside of the handle becomes a female screw (2a) to rotate the interlocking male screw (4b) to rotate the entire central axis (4). The elastic device (3) serves to return to the original position is contracted when the handle is up. The pin 5 does not need to be sharply sharpened because the central axis is perpendicular to the ground and rotates.

Up and down reciprocating device (b) can be largely divided into a fixed device and a moving device.

A central shaft gear (4c) that is screwed to the central shaft and meshes with the small gear, a small gear shaft (4d) that is screwed to the central shaft and supports the small gear to turn, and a fixed tube fixed to the central shaft gear (8) And the tripod 8a move together with the central axis, so it is referred to as a vertical reciprocating fixing device, and a small gear 6 that meshes with the central axis gear, a connecting rod 6a connecting the small gear and the piston, and a small gear rod 7a. ), The piston (7), the piston joint (7b), the ground pipe (7c) is connected together along the piston joint moving groove (8b) to move up and down, so it is referred to as a vertical reciprocating movement device.

The up and down reciprocating device (center shaft gear, etc.) acts as a support for the up and down reciprocating device (small gear, etc.) and is engaged by the combination of the central shaft gear and the small gear (warp and worm gear: because the rotation ratio must be large). It is supposed to go back together.

The central shaft gear 4c is fixed to the central shaft 4 to rotate together to rotate the small gear 6, and the small gear rod 7a reciprocates up and down by a connecting rod 6a installed at the end of the small gear. 7), the piston joint (7b), the ground pipe (7c) is to reciprocate up and down together so that the writing core connected to the rotary shaft to rotate and reciprocate at the same time to draw a line with a dotted line. At this time, the up-and-down reciprocating device (b), the left-right moving device (c), and the recording device (d) can be entirely detachable by the central gear fitting screw 4f and the small gear shaft fitting screw 4e.

The right and left moving device (C) is a device for determining the size of the radius of the circle to be drawn, a spring (9) designed so that the writing core does not break by elasticity even if it touches the ground, a ground rod (10) which always keeps the writing core touching the ground, and a rotating shaft ( 11), the groove shaft is grooved movement shaft movement groove (11a), the adjustment screw movement groove (11b), the movement shaft (12), the fixing shaft to the rotary shaft to move the radius adjustment screw to move the left and right The radius adjusting screw 12a, the moving shaft joint 12b, and the spring device 13 are comprised, and the length of the radius of a circle to be drawn by the left-right movement of the moving shaft 12 changes. The ground rod 10 and the rotating shaft 11 are located below the ground pipe 7c by the pressing force of the spring 9, but are connected to each other to move up and down along the ground pipe groove 7d.

The recording apparatus (D) has an elastic body 13 when the female screw 12c in the moving shaft joint 12b and the male screw 14aa of the connecting portion 14a are engaged with each other and the writing instrument holder 14 is pushed into the moving shaft joint 12b. The male thread enters the space of the site, and the writing instrument holder rotates to make the correct angle, and when it is placed again, it is fixed and returned to its place by the elastic body so that it can draw a small circle or a large circle. Tightening screw (14b) was installed inside the rubber baring to be firmly fixed with screws.

The present invention as described above, pressing the cover (1) with the thumb, the handle (2) wrapped around the bottom of the hand and lifted up by the engagement of the female screw (2a) and the male screw (4b) is changed to the rotational movement at this time the central axis As the gear rotates, a small gear is rotated, and a rotating shaft, a moving shaft, and a writing instrument holder are reciprocated together by a vertical reciprocating motion of a piston connected thereto, and a dotted circle compass is drawn by dotted pens.

When drawing a circle with a dotted line, you can draw a dotted circle at a time by removing the inconvenience of drawing a circle by turning the compass one point at a time, and you can draw a dotted circle in an easy and convenient way. Will be doubled.

Claims (3)

Female and male threads are made to engage with the inside of the handle (2) and the upper end of the central shaft (4), and the upper and lower reciprocating devices (b) are installed at the middle portion of the central shaft, and then the handle (2) is vertically moved. 4) The dotted circle compass which draws the dotted line by the rotational movement of 4) and the up and down reciprocating motion of the up and down reciprocating device (b). The small gear rod (7a) according to claim 1, wherein the central shaft gear (4c) is fixed to the central shaft (4) and rotates together to rotate the small gear (6) and is connected by a connecting rod (6a) installed at the end of the small gear. The dotted circle compass, which is reciprocated upward and downward, and is provided so that the piston (7), the piston joint (7b), and the ground pipe (7c) move up and down together. According to claim 1, the left and right moving device (C) is a spring (9) designed not to be broken by elasticity even if the writing instrument core touches the ground, a grounding rod (10) so that the writing instrument core always touches the ground, the rotating shaft 11, the moving shaft Groove moving shaft (11a), which groove is grooved so that the joint can move left and right, adjusting screw moving groove (11b) which is a path to which the radius adjusting screw can move, moving shaft (12), radius adjusting screw (12a) for fixing the moving shaft to the rotating shaft. ), The moving shaft joint 12b, and the spring device 13, the length of the radius of the circle to be drawn by the left and right movement of the moving shaft 12, the ground rod 10 and the rotating shaft 11 is a spring ( Dotted circle compasses located at the bottom of the ground pipe (7c) by pressing force of 9) but connected to each other and installed to move up and down along the ground pipe groove (7d).