Circle drawing ruler

Abstract

The circle drawing ruler comprises a body and a circular rotating disc, the body is provided with a first through hole matched with the circular rotating disc, and the circular rotating disc is provided with a second through hole allowing a pen point to be inserted therein. First annular protrusions and protruding blocks are arranged on the inner side wall of the first through hole in the thickness direction of the body at intervals, and annular sliding grooves are formed between the first annular protrusions and the protruding blocks. A second annular protrusion is arranged on the periphery of the circular rotating disc, when the circular rotating disc is arranged in the first through hole, the second annular protrusion is clamped into the annular sliding groove, and the second annular protrusion and the annular sliding groove are matched with each other, so that the circular rotating disc rotates relative to the body. When the circle drawing ruler is used, a user can insert the pen point into the second through hole, the second annular protrusion and the annular sliding groove are matched with each other, the circular rotating disc rotates relative to the body, at the moment, the pen point rotates along with the circular rotating disc, and therefore circle drawing is achieved.

Description

Technical Field

[0001] The utility model relates to a circle-drawing ruler. Background Art

[0002] Both rulers and compasses are commonly used drawing tools for students. Since tools such as pens and erasers also need to be carried, the number of tools is relatively large, making them inconvenient to carry and use. Content of the Utility Model

[0003] Based on this, it is necessary to provide a circle-drawing ruler that can draw circles.

[0004] A circle-drawing ruler includes a body and a circular turntable. A first through hole matching the circular turntable is provided on the body, and a second through hole for a pen tip to be inserted is provided on the circular turntable.

[0005] On the inner side wall of the first through hole, a first annular protrusion and a convex block are provided at intervals along the thickness direction of the body. An annular sliding groove is formed between the first annular protrusion and the convex block.

[0006] Both the first annular protrusion and the convex block are at least two. At least two first annular protrusions are arranged at intervals along the circumferential direction of the inner side wall of the first through hole, and at least two intervals corresponding to at least two convex blocks are formed between adjacent two first annular protrusions.

[0007] The projection of the interval along the thickness direction of the body falls on the convex block, and / or the projection of the convex block along the thickness direction of the body falls on the interval.

[0008] A second annular protrusion is provided on the outer periphery of the circular turntable. When the circular turntable is arranged in the first through hole, the second annular protrusion is snapped into the annular sliding groove, and the second annular protrusion and the annular sliding groove cooperate with each other to enable the circular turntable to rotate relative to the body.

[0009] In one embodiment, both the first annular protrusion and the convex block are at least three. Both the first annular protrusion and the convex block are arc-shaped, and the radian of the first annular protrusion is greater than the radian of the convex block.

[0010] In one embodiment, the intervals and the convex blocks are of the same size, and both the body and the circular turntable are injection-molded parts.

[0011] In one embodiment, the first through hole is a circular through hole. The first annular protrusion is closer to the bottom surface of the body than the convex block. The bottom surfaces of both the body and the circular turntable are planes.

[0012] In one embodiment, there are multiple second through holes, and the multiple second through holes are arranged at intervals along the radial direction of the circular turntable.

[0013] In one embodiment, a linear through groove for the nib to be inserted is further provided on the circular turntable.

[0014] In one embodiment, the linear through groove passes through the center of the circular turntable.

[0015] In one embodiment, an operation part is provided on the top surface of the circular turntable, and the operation part is a protrusion, a groove or a hole.

[0016] In one embodiment, the circular turntable is transparent or semi-transparent, and a circumferential scale is provided on the outer periphery of the circular turntable;

[0017] And / or, the main body is transparent or semi-transparent, and a circumferential scale is provided on the outer periphery of the first through hole.

[0018] In one embodiment, at least one side of the main body is a straight side.

[0019] When using this circle-drawing ruler, the user can insert the nib into the second through hole, and the second annular protrusion and the annular sliding groove cooperate with each other, so that the circular turntable rotates relative to the main body. At this time, the nib rotates with the circular turntable, thereby realizing circle drawing. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the circle-drawing ruler of the first embodiment.

[0021] Figure 2 As shown in Figure 1 It is an exploded structural diagram of the circle-drawing ruler shown.

[0022] Figure 3 As shown in Figure 1 It is a schematic structural diagram of one direction of the main body of the circle-drawing ruler shown.

[0023] Figure 4 As shown in Figure 1 It is a schematic structural diagram of one direction of the circular turntable of the circle-drawing ruler shown. Detailed Embodiments

[0024] To make the objectives, technical solutions and advantages of the present utility model clearer, the embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

[0025] As shown in Figure 1 and Figure 2The compass of an embodiment shown includes a body 10 and a circular turntable 20. A first through hole 101 matching the circular turntable 20 is provided on the body 10, and a second through hole 201 for inserting a pen tip is provided on the circular turntable 20.

[0026] Combined with Figure 3 , on the inner side wall of the first through hole 101, a first annular protrusion 12 and a convex block 14 are provided at intervals along the thickness direction of the body 10. An annular chute 16 is formed between the first annular protrusion 12 and the convex block 14.

[0027] Both the first annular protrusion 12 and the convex block 14 are at least two. At least two first annular protrusions 12 are arranged at intervals along the circumferential direction of the inner side wall of the first through hole 101, and at least two intervals 18 corresponding to at least two convex blocks 14 are formed between two adjacent first annular protrusions 12.

[0028] The projection of the interval 18 along the thickness direction of the body 10 falls on the convex block 14, and / or the projection of the convex block 14 along the thickness direction of the body 10 falls on the interval 18.

[0029] Combined with Figure 4 , a second annular protrusion 22 is provided on the outer periphery of the circular turntable 20. When the circular turntable 20 is arranged in the first through hole 101, the second annular protrusion 22 is snapped into the annular chute 16. The second annular protrusion 22 and the annular chute 16 cooperate with each other to enable the circular turntable 20 to rotate relative to the body 10.

[0030] When using this compass, the user can insert the pen tip into the second through hole 201. The second annular protrusion 22 and the annular chute 16 cooperate with each other to enable the circular turntable 20 to rotate relative to the body 10. At this time, the pen tip rotates with the circular turntable 20, thereby realizing drawing a circle.

[0031] Combined with the attached drawings, in this embodiment, the interval 18 and the convex block 14 are of the same size, that is, the projection of the interval 18 along the thickness direction of the body 10 falls on the convex block 14, and the projection of the convex block 14 along the thickness direction of the body 10 falls on the interval 18.

[0032] Such a structural setting improves the relative stability between the body 10 and the circular turntable 20.

[0033] In this embodiment, both the body 10 and the circular turntable 20 are injection molded parts. Since both the body 10 and the circular turntable 20 are injection molded parts and the interval 18 and the convex block 14 are of the same size, it is convenient for the injection molding and demolding of the body 10 and the circular turntable 20.

[0034] Preferably, both the first annular protrusion 12 and the convex block 14 are at least three. Both the first annular protrusion 12 and the convex block 14 are arc-shaped, and the radian of the first annular protrusion 12 is greater than the radian of the convex block 14.

[0035] The specific numbers of the first annular protrusion 12 and the bump 14 can be set according to actual situations.

[0036] Specifically, in this embodiment, the first through hole 101 is a circular through hole.

[0037] Combined with the attached drawings, in this embodiment, the first annular protrusion 12 is closer to the bottom surface of the body 10 than the bump 14, and the bottom surfaces of both the body 10 and the circular turntable 20 are flat surfaces.

[0038] Preferably, there are a plurality of second through holes 201, and the plurality of second through holes 201 are arranged at intervals along the radial direction of the circular turntable 20.

[0039] Combined with the attached drawings, in this embodiment, the plurality of second through holes 201 are divided into three groups, and each group of second through holes 201 forms a straight line.

[0040] In this embodiment, a linear through groove 202 for the nib to be inserted is further provided on the circular turntable 20.

[0041] The linear through groove 202 can be used to draw a straight line, and can also be used to cooperate with the rotation of the circular turntable 20 while drawing a straight line, so as to draw various different arc lines.

[0042] Preferably, in this embodiment, the linear through groove 202 passes through the center of the circular turntable 20.

[0043] Preferably, an operation part 24 is provided on the top surface of the circular turntable 20. The operation part 24 can facilitate the user to operate the rotation of the circular turntable 20.

[0044] In this embodiment, the operation part 20 is a protrusion. In other embodiments, the operation part 20 can also be a groove or a hole.

[0045] Preferably, the circular turntable 20 is transparent or semi-transparent, and a circumferential scale is provided on the outer periphery of the circular turntable 20.

[0046] And / or, preferably, the body 10 is transparent or semi-transparent, and a circumferential scale is provided on the outer periphery of the first through hole 101.

[0047] Through the above settings, this circle-drawing ruler can also have the function of a protractor.

[0048] Combined with the attached drawings, in this embodiment, at least one side of the body 10 is a straight side.

[0049] The above-described embodiments only represent several embodiments of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A circle-drawing ruler, characterized in that, It includes a body and a circular turntable. A first through hole matching the circular turntable is provided on the body, and a second through hole for the pen tip to be inserted is provided on the circular turntable. On the inner side wall of the first through hole, a first annular protrusion and a bump are provided at intervals along the thickness direction of the body. An annular chute is formed between the first annular protrusion and the bump. Both the first annular protrusion and the bump are at least two. At least two first annular protrusions are arranged at intervals along the circumferential direction of the inner side wall of the first through hole, and at least two intervals corresponding to the at least two bumps are formed between two adjacent first annular protrusions. The projection of the interval along the thickness direction of the body falls on the bump, and / or the projection of the bump along the thickness direction of the body falls on the interval. A second annular protrusion is provided on the outer periphery of the circular turntable. When the circular turntable is arranged in the first through hole, the second annular protrusion is snapped into the annular chute, and the second annular protrusion and the annular chute cooperate with each other to enable the circular turntable to rotate relative to the body.

2. The round drawing ruler according to claim 1, characterized in that, Both the first annular protrusion and the bump are at least three. Both the first annular protrusion and the bump are arc-shaped, and the radian of the first annular protrusion is greater than that of the bump.

3. The circle-drawing ruler according to claim 2, characterized in that, The intervals and the bumps are of the same size, and both the body and the circular turntable are injection-molded parts.

4. The circle-drawing ruler according to claim 3, characterized in that, The first through hole is a circular through hole. The first annular protrusion is closer to the bottom surface of the body than the bump. The bottom surface of the body and the bottom surface of the circular turntable are both flat surfaces.

5. The round drawing ruler according to any one of claims 1 to 4, characterized in that, The second through holes are multiple, and the multiple second through holes are arranged at intervals along the radial direction of the circular turntable.

6. The circle-drawing ruler according to claim 5, wherein A linear through slot for the pen tip to be inserted is further provided on the circular turntable.

7. The round-drawing ruler according to claim 6, wherein The linear through slot passes through the center of the circular turntable.

8. The round drawing ruler according to claim 5, wherein, An operation part is provided on the top surface of the circular turntable. The operation part is a protrusion, a groove or a hole.

9. The circle-drawing ruler according to claim 5, characterized in that, The circular turntable is transparent or semi-transparent, and a circumferential scale is provided on the outer periphery of the circular turntable. And / or, the body is transparent or semi-transparent, and a circumferential scale is provided on the outer periphery of the first through hole.

10. The circle-drawing ruler according to claim 5, characterized in that, At least one side of the body is a straight side.

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