KR200369186Y1 - A tapeline com-passes - Google Patents

Abstract

The present invention relates to an educational tape measure that can be easily drawn with a small force even without holding the fixed shaft portion at the moment of drawing a circle, and is fixed to the fixed shaft portion attached to a blackboard made of steel or non-ferrous, and fixed shaft portion It is characterized in that it comprises a swivel with an assembling hole to be assembled through, a drawer tape provided on the swivel to adjust the protruding length of the tape freely, and a writing instrument holder is provided at the end of the tape .

Description

Tape Measure Compass for Education {A tapeline com-passes}

The present invention relates to an educational tape measure, and more particularly, to an educational tape measure that allows the user to easily draw a circle with little force even without holding the fixed shaft at the moment of drawing the circle.

In general, when teaching a circle by drawing a circle on the board, use a compass to draw the circle.

The commonly used compasses, both leg-shaped compasses whose upper end is fixed through a rotating shaft and a string compass connecting a line to the central axis is widely used.

However, when the above-mentioned two-legged compass is used for a long time, the fixing force of the rotating shaft fixing both legs becomes weak, and when the circle is drawn, the center is disturbed or the circle drawn is distorted.

In addition, the below-mentioned line compass is difficult to adjust the size of the circle because the length of the line is limited, and draw a circle while the teacher pulls the line as the line flows when drawing the circle is a lot of force I had.

Therefore, the present invention is designed to solve the above problems, a black board made of iron (hereinafter referred to as "blackboard") or a non-ferrous board (wood, synthetic resin, glass, etc.) consisting of a black board, white board, glass board ( Hereinafter, a circle can be drawn through a drawer tape that is rotated around a fixed shaft portion attached to a “blackboard”), and a circle can be easily drawn without a small force even when the circle is drawn. The aim is to provide an educational tape measure.

In addition, when the circle is drawn, the tape measure consists of diaphragms, which prevents the tape from bending (bending) in the direction of rotation of the writing instrument. will be.

In addition, the purpose of checking the withdrawal length of the tape measure to the length marking portion marked on the tape measure to draw a circle of the correct radius.

1 is a perspective view showing a compass of the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

Figure 3 is a cross-sectional view showing a second embodiment of the fixed shaft portion according to the present invention.

Figure 4 is a perspective view showing a third embodiment of the fixed shaft portion according to the present invention.

5 is a cross-sectional view taken along the line B-B in FIG.

Figure 6 is a sectional view showing a fourth embodiment of the fixed shaft portion according to the present invention.

7 is a cross-sectional view showing a fifth embodiment of the fixed shaft portion according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Fixed shaft part

11: fixed shaft for steel blackboard

111: Magnet

12: Fixed shaft for nonferrous blackboard

121: adsorption port

13: fixing tube for steel blackboard

13a: magnet ring, 131: convex lens, 132: center marking line,

133: fixed tube for the non-ferrous blackboard, 134: adsorption port,

135: nailing mounting shaft, 136: nailing part

2: swivel

21: assembly hole, 22: bearing

3: withdrawal tape

31: Case

32: tape measure

33: locking button

4: writing instrument holder

41: open sides

411: writing instrument receiving portion, 412: rotation axis

42: spring

The present invention for achieving the above object is a fixed shaft portion attached to a blackboard made of steel or non-ferrous material, a swivel provided with an assembly hole rotatably assembled through the fixed shaft portion, and the tape is provided on the swivel It is characterized in that consisting of a drawer tape, the protruding length is freely adjusted, and the writing instrument holder is provided at the end of the tape measure is fixed writing instruments.

1 is a perspective view showing a compass of the present invention, Figure 2 is a cross-sectional view taken along line A-A of Figure 1 showing a state of use of the compass according to the present invention.

Compass according to the present invention is a fixed shaft portion (1) attached to a steel or non-ferrous blackboard (black board, white board, glass board, etc.), and the assembly hole 21 rotatably assembled through the fixed shaft portion (1) Is provided with a swivel (2), and withdrawal tape (3) is provided on the swivel (2) to adjust the length of the tape measure 32 freely, and writing instruments holder is provided at the end of the tape measure is fixed ( 4) consists of.

In addition, the fixed shaft portion 1 of the first embodiment is characterized in that it is composed of a fixed shaft 11 for the steel blackboard provided with a magnet 111 in the lower portion to be attached to the blackboard made of the steel. In other words, the magnet 111 is attached to the surface of the blackboard made of steel, so that the fixed shaft 11 for the steel blackboard is non-rotated and only the rotating table 2 mounted on the fixed shaft 11 for the steel blackboard is rotated.

In addition, a bearing 22 is further provided between the outside of the fixed shaft portion 1 and the assembly hole 21 of the rotating table 2. In addition, the bearing 22 preferably uses one of a radial bearing, a needle bearing, or a sliding bearing.

In addition, the take-out tape 3 is wound on the inside of the case 31 through the spring-up spring 321 and provided to the outside of the tape measure 32, and the case 31 of the tape measure 32 is pressed. It consists of a locking button 33 to control the protruding length of the tape measure 32 through. The tape measure 32 is composed of a diaphragm marked with a length unit to prevent the tape measure 32 from bending when a circle is drawn. In addition, the dimension of the tape measure 32 is preferably a unit of length from the center of the fixed shaft portion (1).

In addition, the writing instrument holder 4 has a middle opening connected between the rotary shaft 412 and a writing opening receiving portion 411 on the inner side, and an outer side between the opening portions 41 on both sides. It is provided with a spring 42 for generating a receiving force of the writing instrument through both sides of the opening (41).

Below. Referring to the operation of the compass according to the present invention configured as described above are as follows.

1 and 2, first, writing instruments such as chalk are mounted on the writing instrument holder 4 provided in the tape measure 32 of the drawing tape measure 3 constituting the compass according to the present invention.

Next, after attaching the magnet 111 provided on the lower portion of the fixed shaft 11 for the steel blackboard to the blackboard made of steel, the tape measure 32 is drawn out from the drawing tape 3.

Then, by pressing the locking button 33 provided on the tape measure 32 of the take out tape measure 3 downward, the take-off length of the tape measure 32 is interrupted, and then the writing instrument is centered on the fixed shaft 11 for the steel blackboard. By rotating, you draw a circle on the surface of a board made of steel.

Therefore, as shown in the above, the protruding distance of the tape measure in the drawing is controlled by pressing the locking button 33 of the drawing tape 3, and then the circle of the correct radius can be drawn by drawing the circle.

In addition, as the swivel table 2 with the drawing tape 3 is rotated around the fixed shaft 11 for the steel blackboard in the drawing of the circle as a whole, the fixed shaft 11 for the steel blackboard at the moment of drawing the circle. You can easily draw a circle even if you don't hold it. In addition, as the bearing 22 is further provided between the fixed shaft 11 for the steel blackboard and the assembly hole 21 of the swivel table 2, the circle can be easily drawn with a small force.

In addition, when the circle is drawn, the tape measure 32 is formed as a diaphragm, thereby preventing the phenomenon of bending in the direction of rotation of the writing instrument at the moment of drawing the circle. Therefore, if you draw a circle, you can prevent the crushing of the circle.

In addition, it is possible to draw a circle of the correct radius by adjusting the drawing length of the tape measure 32 while checking the length marking portion marked on the tape measure 32.

In addition, as the attachment force of the magnet 111 is strong, it is possible to draw a circle with a thick line or the like, as well as to draw a circle with a large radius.

3 is a cross-sectional view showing a second embodiment of the fixed shaft portion according to the present invention.

The fixed shaft portion 1 of another embodiment according to the present invention is characterized in that it consists of a fixed shaft 12 for the non-ferrous blackboard provided with a suction hole 121 at the bottom.

That is, the adsorption port 121 is formed of a flexible rubber material in the shape of a cap. When the adsorption port 121 comes into close contact with a blackboard made of non-ferrous material, a vacuum pressure is applied to the inside of the adsorption port 121. 121) is attached to the surface of the board. Therefore, it is possible to easily attach the fixed shaft 12 for the non-ferrous blackboard provided in the lower portion of the suction hole 121 to the blackboard.

In addition, the suction hole 121 provided on the fixed shaft 12 for the non-ferrous blackboard can be easily mounted on a non-ferrous blackboard as well as an iron blackboard.

Therefore, the fixed shaft 12 for the non-ferrous blackboard including the adsorption holes 121 configured as described above is attached to the blackboard, and then the drawing tape 3 including the swivel table 2 and the tape measure 32 on which the writing instrument is mounted. You can draw a circle on the board by rotating.

And the writing instruments can be used for marking chalk on the blackboard, and if you draw a circle on a white board or glass board maca fan can be used.

4 is a perspective view showing a third embodiment of the fixed shaft according to the present invention, Figure 5 is a cross-sectional view taken along the line B-B of FIG.

The fixed shaft portion 1 of yet another embodiment according to the present invention is characterized in that it is composed of a steel tube fixing tube 13 is provided with a magnet ring 13a around the bottom.

The convex lens 131 including the center marking line 132 is further provided on the upper portion of the fixing board 13 for the steel blackboard so as to easily find the center.

Accordingly, the drawer tape 3 including the steel tube fixing tube 13 including the magnet ring 13a configured as described above is attached to the steel board, and then the swivel table 2 and the tape measure 32 on which the writing instrument is mounted. You can draw a circle on the board by rotating).

And when attaching the steel tube fixing tube 13 to the blackboard, it is easy to find the center through the convex land 131 provided on the upper portion of the steel blackboard fixing tube 13. In addition, the center of the convex land 131 is provided with a center marking line 132 it is possible to more precisely match the center.

Therefore, through the steel tube fixing tube 13 included in the compass as described above it is possible to mount the compass on the blackboard made of steel in an easy and accurate position.

6 is a sectional view showing a fourth embodiment of a fixed shaft according to the present invention.

Thus, the fixed shaft portion 1 of the fourth embodiment according to the present invention, the non-ferrous material provided with a lower suction hole 134 inside the fixed tube 12 for steel blackboard constituting the fixed shaft portion 1 of the fourth embodiment Fixing tube 133 for the blackboard is characterized in that it is further provided.

Therefore, by further mounting the non-ferrous blackboard fixing tube 133 provided with a suction hole 134 in the lower portion of the fixed blackboard for steel blackboard 13, the compass is easily attached to a blackboard consisting of a non-ferrous steel as well as a steel blackboard. To draw a circle.

That is, the non-ferrous blackboard fixing tube 133 equipped with the suction hole 134 is provided in the inside of the fixed blackboard 12 for the steel blackboard, and then the suction hole provided in the lower portion of the fixing tube 133 for the non-ferrous blackboard 134 may be attached to the surface of the board, and then a circle may be drawn on the board by rotating the drawer tape 3 including the turntable 2 and the tape measure 32 as a whole.

7 is a sectional view showing a fifth embodiment of the fixed shaft portion according to the present invention.

Thus, the fixed shaft portion 1 of the fifth embodiment according to the present invention, the pinch mounting shaft formed with a sharp pinching portion 136 in the steel tube fixing tube 13 constituting the fixed shaft portion 1 of the fourth embodiment It is characterized in that the 135 is further provided.

Therefore, it is also possible to draw a large circle required for sports activities in the state in which the embedding mounting shaft 135 is put on the ground.

As described above, it is possible to easily draw a circle with a small force even when not holding the fixed shaft at the moment of drawing a circle, thereby providing an educational tape measure for teaching to increase the educational effect by allowing a teacher to draw a circle in a short time. There is.

In addition, in the case of drawing a circle, a tape measure is formed by the diaphragm, so that an accurate circle can be drawn.

In addition, the drawing length of the tape measure is checked by the length marking part marked on the tape measure so that the circle can be drawn with the correct center.

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the present invention from this description. Therefore, the scope of the present invention should be construed by the claims described to include many such variations.

Claims (11)

A fixed shaft portion (1) attached to a blackboard made of steel or non-ferrous material, A swivel table 2 having an assembly hole 21 rotatably assembled to the fixed shaft portion 1, and A pull-out tape (3) provided on the swivel table (2) to freely adjust the protruding length of the tape measure (32), and Educational tape measure, characterized in that consisting of a writing instrument holder (4) is provided at the end of the tape measure 32 is fixed writing instruments. The method of claim 1, wherein the fixed shaft portion (1) is an educational tape measure, characterized in that consisting of a fixed shaft (11) for steel blackboard provided with a magnet (111) at the bottom. The method of claim 1, wherein the fixed shaft portion (1) is an educational tape measure, characterized in that consisting of a fixed shaft (12) for the non-ferrous blackboard provided with a suction hole 121 in the lower portion. The method of claim 1, wherein the fixed shaft portion (1) is an educational tape measure compasses, characterized in that consisting of a steel tube fixing tube (13) provided with a magnet ring (13a) around the lower portion. The method of claim 4, wherein the convex lens 131 including a central marking line 132 is further provided on the upper portion of the fixing board for the steel blackboard (13) to easily find the center. The fixed shaft part 1 further includes a mounting plate 133 for fixing the black board, which is inserted into the fixed board 13 for the steel blackboard and has a suction hole 134 in the lower portion thereof. Educational tape measure, characterized in that. The method of claim 4, wherein the fixed shaft portion (1), characterized in that it further comprises a fixed mounting shaft 135 is inserted into the inside of the fixed tube 13 for the steel blackboard, the sharp pinned portion 136 is formed at the bottom. Tape measure compasses. The educational tape measure according to any one of claims 1 to 7, wherein a bearing 22 is further provided between the outer side of the fixed shaft portion 1 and the assembly hole 21 of the swivel table 2. . The tape measure 32 according to any one of claims 1 to 7, wherein the tape measure 3 is wound around the case 31 by a spring-up spring 321 and drawn out to the outside. 32 is provided on the case 31 of the lead-out portion of the educational tape measure, characterized in that consisting of a locking button 33 to control the protruding length of the tape measure 32 through the pressing operation. 10. The educational tape measure of claim 9, wherein the tape measure is made of a diaphragm marked with a length unit. The writing tool holder (4) according to any one of claims 1 to 7, wherein the intermediate opening is connected to the middle through the rotary shaft 412, the inner side of the writing device receiving portion 411 is provided on both sides of the opening (41) And a spring (42) provided between the outer sides of the two open ends (41) and generating a receiving force of the writing instrument through both open ends (41).