Movable flat rod drawing compasses

Abstract

The utility model discloses a movable type horizontal rod drawing compass which comprises a rotating rod, an adjusting rod, a pencil and two fixing pieces, a through hole is formed in the rotating rod, the adjusting rod is arranged in the through hole in a sliding mode, a fixing hole is formed in the end, away from the rotating rod, of the adjusting rod, the fixing hole is vertically formed, and the pencil is arranged in the fixing hole in a sliding mode. Fixing pieces are arranged in the through hole and the fixing hole respectively, and the two fixing pieces are matched with the adjusting rod and the pencil respectively, so that the rotating rod and the pencil are fixed to the adjusting rod; under the action of the adjusting rod, the rotating rod and the pencil can be in a parallel state, and the pencil can be perpendicular to paper so as to ensure that line segments are uniform in thickness during drawing; and meanwhile, the rotating rod slides on the adjusting rod, so that the radius during circle drawing can be adjusted under the condition that the rotating rod is parallel to the pencil.

Description

Technical Field

[0001] The utility model relates to the technical field of compasses, in particular to a movable flat-bar drawing compass. Background Art

[0002] A compass is a tool used for drawing circles. Generally, a drawing compass includes two legs. The upper ends of the two legs are hinged and the lower ends can be separated freely. When drawing a circle, the positioning leg remains stationary, and the other leg is pushed by hand to rotate around the positioning needle.

[0003] However, due to the arrangement at a certain angle of the existing compass, when drawing a picture, a certain distance is opened between the pencil and the fixed end, so that the tip of the pencil forms a certain angle with the paper. At present, in order to facilitate filling in answer sheets, automatic pencils generally adopt a structure with a square core. However, when this pencil is applied to a compass, since it forms a certain angle with the paper, the side edge of its bottom surface will contact the paper first, and the drawn line is relatively thin. As the tip of the pencil wears gradually, the drawn line will gradually become thick, resulting in uneven thickness of the line segments of the circle and affecting the quality of drawing.

[0004] In view of this, the existing technology still needs to be improved and developed. Content of the Utility Model

[0005] In view of the deficiencies of the above-mentioned existing technology, the purpose of the utility model is to provide a movable flat-bar drawing compass, aiming to solve the problem that when the existing compass draws a circle, due to the inclined arrangement of the pencil, the thickness of the line segments of the circle is uneven, affecting the quality of the drawing.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows:

[0007] A movable flat-bar drawing compass includes:

[0008] A rotating rod; a through hole is arranged inside the rotating rod;

[0009] An adjusting rod, which is slidably arranged in the through hole; a fixing hole is vertically arranged at one end of the adjusting rod away from the rotating rod;

[0010] A pencil, which is slidably arranged in the fixing hole;

[0011] Two fixing pieces are respectively arranged in the through hole and the fixing hole; the two fixing pieces are respectively matched with the adjusting rod and the pencil to fix the rotating rod and the pencil to the adjusting rod.

[0012] Further, the rotating rod includes:

[0013] A first rod;

[0014] A circular groove plate is arranged at the bottom of the first rod; the through hole is arranged in the circular groove plate;

[0015] A second rod is rotatably arranged at the bottom of the circular groove plate; the first rod and the second rod are coaxially arranged, and the bottom of the second rod is in a sharp cone shape.

[0016] Furthermore, a scale is arranged on one side of the adjusting rod.

[0017] Furthermore, threaded holes are respectively arranged on one side of the through hole and the fixing hole, the two threaded holes are respectively communicated with the through hole and the fixing hole, two fixing members are respectively rotatably arranged in the two threaded holes, and the two fixing members respectively abut against the adjusting rod and the pencil.

[0018] Furthermore, the fixing member is a bolt, the bolt is in threaded fit with the threaded hole, and a screwing disc is arranged at one end of the bolt.

[0019] Furthermore, the fixing member is a rubber pad, the two rubber pads are respectively arranged on the inner walls of the through hole and the fixing hole, the adjusting rod is in interference fit with the through hole, and the pencil is in interference fit with the fixing hole.

[0020] Furthermore, the adjusting rod is a telescopic rod.

[0021] Furthermore, a horizontal tester is arranged at the top of the adjusting rod.

[0022] Compared with the prior art, the beneficial effects of the present utility model are:

[0023] In the present utility model, a through hole is arranged inside the rotating rod, an adjusting rod is slidably arranged inside the through hole, a fixing hole is arranged at one end of the adjusting rod away from the rotating rod, the fixing hole is vertically arranged, and a pencil is slidably arranged inside the fixing hole. Fixing members are respectively arranged inside the through hole and the fixing hole, and the two fixing members respectively cooperate with the adjusting rod and the pencil to fix the rotating rod and the pencil to the adjusting rod; through the action of the adjusting rod, the rotating rod and the pencil can be in a parallel state, the pencil can be perpendicular to the paper, and the bottom wall of the pencil lead is parallel to the paper to ensure the uniform thickness of the line segments during drawing; at the same time, by sliding the rotating rod on the adjusting rod, the radius during drawing a circle can be adjusted while the rotating rod and the pencil remain parallel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0025] Figure 2 It is a schematic diagram of the structure of the rotating rod of the present utility model.

[0026] The numerical markings shown in the figure are as follows: 1, rotating rod; 11, through hole; 12, first rod; 13, circular groove plate; 14, second rod; 2, adjusting rod; 3, fixing hole; 4, pencil; 5, fixing piece. Detailed implementation mode

[0027] To make the objectives, technical solutions and effects of the present utility model clearer and more definite, the following further elaborates on the present utility model with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In view of the deficiencies of the prior art, this embodiment provides a movable flat-bar drawing compass, which can be specifically referred to as follows:

[0031] As shown in the attached Figure 1 and the attached Figure 2As shown in the figure, a movable flat-bar drawing compass includes a rotating rod 1, an adjusting rod 2, a pencil 4, and two fixing members 5. The rotating rod 1 is a center rod and is only used for self-rotation. A through hole 11 is provided inside the middle position of the rotating rod 1. The through hole 11 runs through the rotating rod 1. An adjusting rod 2 is slidably arranged in the through hole 11. The adjusting rod 2 is cylindrical. A fixing hole 3 is provided at one end of the adjusting rod 2 away from the rotating rod 1. The fixing hole 3 is arranged vertically, and the inside of the fixing hole 3 is used to accommodate the pencil 4. This pencil 4 is used for drawing circles. A fixing member 5 is respectively provided inside the through hole 11 and the fixing hole 3. The two fixing members 5 cooperate with the adjusting rod 2 and the pencil 4 respectively, and the rotating rod 1, the pencil 4, and the adjusting rod 2 are fixed through the fixing member 5. Through the action of the adjusting rod 2, the rotating rod 1 and the pencil 4 can be in a parallel state, and the pencil 4 can be perpendicular to the paper to ensure that the thickness of the line is uniform during drawing. At the same time, by sliding the rotating rod 1 on the adjusting rod 2, the radius when drawing a circle can be adjusted while the rotating rod 1 and the pencil 4 remain parallel.

[0032] In this embodiment, the adjusting rod 2 and the rotating rod 1 are detachably arranged, and the pencil 4 and the fixing hole 3 of the adjusting rod 2 are also detachably arranged. In the initial state, the movable flat-bar drawing compass includes three components, namely the rotating rod 1, the adjusting rod 2, and the pencil 4. The three components are respectively strip-shaped and in a separated state to facilitate the storage of the compass, avoiding the situation that the overall compass occupies too much space and cannot be placed or is inconvenient to carry, etc.

[0033] When it is necessary to use this compass for drawing, the adjusting rod 2 can be first inserted into the through hole 11 of the rotating rod 1, and the adjusting rod 2 and the rotating rod 1 are fixed through the fixing member 5. Then the pencil 4 is placed in the fixing hole 3 of the adjusting rod 2, and the height of the pencil 4 and the bottom wall of the rotating rod 1 is adjusted so that the tip of the pencil 4 and the bottom wall of the rotating rod 1 are on the same horizontal plane to ensure that the tip of the pencil 4 is perpendicular to the paper during drawing. Then the pencil 4 and the adjusting rod 2 are fixed through the fixing member 5. Finally, by loosening the fixing member 5 in the through hole 11, the distance between the rotating rod 1 and the pencil 4 is adjusted to confirm the radius of the circle, and then the rotating rod 1 is rotated.

[0034] During assembly, the pencil 4 can also be fixed first, and then the adjusting rod 2 is inserted into the through hole 11. First, the radius of the drawn circle is adjusted, and then the adjusting rod 2 and the rotating rod 1 are fixed through the fixing member 5. Finally, the height of the tip of the pencil 4 is adjusted.

[0035] In one embodiment of the present application, a scale is provided on one side of the adjusting rod 2. Specifically, scales can be provided on both the left and right sides of the adjusting rod 2 to facilitate manual adjustment of the distance between the rotating rod 1 and the pencil 4.

[0036] Further, a sliding groove is provided on one side of the adjusting rod 2, and a scale block is arranged in the sliding groove; due to the different diameters of the pencils 4, the position of the center of the pencil 4 relative to the fixing hole 3 will also change. By providing a sliding groove and a scale block on one side of the adjusting rod 2, the radius of the circle drawn by pencils 4 with different diameters can be confirmed without measuring with an external ruler. Specifically, when the diameters of the pencils 4 are different, the scale block can be slid to align the 0 scale position of the scale block with the center of the pencil 4, and then the value corresponding to the center of the rotating rod 1 can be read at the other end.

[0037] As shown in the Figure 1 and Figure 2 figures, threaded holes are provided on one side of the through hole 11 and the fixing hole 3 respectively. The two threaded holes are respectively communicated with the corresponding through hole 11 and the fixing hole 3. The two fixing members 5 are respectively rotatably arranged in the two threaded holes and respectively abut against the adjusting rod 2 and the pencil 4 to fix the adjusting rod 2 and the rotating rod 1, and to fix the adjusting rod 2 and the pencil 4.

[0038] In this embodiment, the fixing member 5 is a bolt, and the bolt is in threaded engagement with the threaded hole. One end of the bolt is provided with a screwing disc. When the adjusting rod 2 is placed in the through hole 11 or the pencil 4 is placed in the fixing hole 3, the screwing disc can be screwed to make one end of the bolt abut against the side wall of the adjusting rod 2 or the pencil 4 and be fixed.

[0039] Further, the fixing member 5 can also be a setscrew. The setscrew is in threaded engagement with the threaded hole and can be rotated by the workpiece to abut against the side wall of the adjusting rod 2 or the pencil 4 to fix the adjusting rod 2 or the pencil 4.

[0040] In this embodiment, a rubber pad is provided at one end of the bolt or the setscrew close to the adjusting rod 2 or the pencil 4. The rubber pad abuts against the side wall of the adjusting rod 2 or the pencil 4 to prevent the top end of the bolt from scratching or damaging the adjusting rod 2 or the pencil 4.

[0041] In an embodiment of the present application, the fixing member 5 can also be a rubber pad. The two rubber pads are respectively arranged on the inner walls of the through hole 11 and the fixing block. An interference fit is provided between the adjusting rod 2 and the through hole 11 and between the pencil 4 and the fixing hole 3. Through the interference fit, the installation between the adjusting rod 2 and the through hole 11 and between the pencil 4 and the fixing hole 3 can be more convenient, and the installation efficiency and overall stability can be effectively improved.

[0042] In an embodiment of the present application, the adjusting rod 2 is a telescopic rod. The telescopic rod is a prior art, and the telescopic rod can be an electric telescopic rod. When installing, the radius of the drawn circle can be adjusted by the telescopic movement of the adjusting rod 2. At the same time, scales are provided on multiple rods of the telescopic rod. By setting the adjusting rod 2 as a telescopic rod, it is not only convenient to adjust the radius of the drawn circle, but also convenient to contract the adjusting rod 2 for storage and transportation.

[0043] As shown in the Figure 2 accompanying drawings, the rotating rod 1 includes a first rod 12, a circular groove plate 13 and a second rod 14. The first rod 12 is located at the top, the second rod 14 is located at the bottom, and the circular groove plate 13 is located in the middle position between the first rod 12 and the second rod 14. The first rod 12 is cylindrical, and a knob can be provided at the top of the first rod 12 to facilitate manual rotation of the first rod 12. The circular groove plate 13 is arranged at the bottom of the first rod 12, and the vertical central axis of the circular groove plate 13 coincides with the axis of the first rod 12 to ensure the coaxiality of the rotation of the circular groove plate 13 and the first rod 12. The through hole 11 is located inside the circular groove plate 13 and is coaxially arranged with the circular groove plate 13. The second rod 14 is rotatably arranged at the bottom of the circular groove plate 13. The second rod 14 is coaxially arranged with the first rod 12, and the bottom of the second rod 14 is in a sharp cone shape to facilitate the fixation of the second rod 14 and prevent the second rod 14 from sliding on the paper while drawing a circle, resulting in a failed drawing.

[0044] Specifically, the adjusting rod 2 is inserted into the through hole 11 of the circular groove plate 13 and fixed by a fixing member 5. The pencil 4 is also fixed in the fixing hole 3, and the height of the pencil 4 is adjusted. Then, the first rod 12 is manually rotated, and the first rod 12 and the circular groove plate 13 are rotated on the top of the second rod 14. The circular groove plate 13 drives the adjusting rod 2 and the pencil 4 to rotate around the second rod 14 to draw a circle. By rotatably arranging the first rod 12 and the circular groove plate 13 on the second rod 14, it can effectively prevent the second rod 14 from rotating during rotation, resulting in the second rod 14 deviating from the center of the drawn circle. By fixing the second rod 14, the stability of the second rod 14 can be increased.

[0045] In an embodiment of the present application, a level tester is provided at the top of the adjusting rod 2. The level tester is a prior art. A switch button and a display screen are provided on the surface of the level tester. By turning on the level tester and then placing the rotating rod 1 and the pencil 4 on the paper, it can be used to detect the levelness of the adjusting rod 2 and avoid the pencil 4 being inclined relative to the paper surface.

[0046] In this embodiment, since the paper or the desktop is in an inclined state, the inclination of the paper or the desktop can be detected by first placing the adjusting rod 2 on the paper or the desktop, and then comparing the measured value after installing the rotating rod 1 and the pencil 4 to know whether there is an inclination.

[0047] Those skilled in the art will readily conceive of other embodiments of the present utility model after considering the specification and practicing the solutions disclosed herein. The present utility model is intended to cover any variations, uses or adaptations of the present utility model, which follow the general principles of the present utility model and include the common general knowledge or conventional technical means in the technical field not disclosed in this solution. The description and examples are only to be regarded as exemplary, and the true scope and spirit of the present utility model are pointed out by the claims.

Claims

1. A movable flat rod drawing compass, characterized in that: include: A rotating rod; a through hole is provided inside the rotating rod; An adjusting rod is slidably disposed in the through hole; a fixing hole is vertically disposed on one end of the adjusting rod away from the rotating rod; A pencil, slidably disposed in the fixing hole; Two fixing members are respectively arranged in the through hole and the fixing hole; the two fixing members are respectively matched with the adjusting rod and the pencil to fix the rotating rod and the pencil to the adjusting rod.

2. The movable flat-bar drawing compass according to claim 1, characterized in that, The rotating rod comprises: First shot; A circular groove plate is provided at the bottom of the first rod; the through hole is provided in the circular groove plate; The second rod is rotatably arranged at the bottom of the circular groove plate; the first rod and the second rod are coaxially arranged, and the bottom of the second rod is in a pointed cone shape.

3. The movable flat-bar drawing compass according to claim 1, characterized in that, A scale is provided on one side of the adjusting rod.

4. A movable flat-bar drawing compass according to claim 1, characterized in that, A threaded hole is provided on one side of the through hole and the fixing hole, and the two threaded holes are respectively connected with the through hole and the fixing hole. The two fixing members are respectively rotatably provided in the two threaded holes, and the two fixing members are respectively supported by the adjusting rod and the pencil.

5. The movable flat rod drawing compass according to claim 4, characterized in that: The fixing member is a bolt, the bolt is threadedly matched with the threaded hole, and one end of the bolt is provided with a turning disk.

6. The movable flat rod drawing compass according to claim 1, characterized in that: The fixing member is a rubber pad, and the two rubber pads are respectively arranged on the inner walls of the through hole and the fixing hole. The adjusting rod is interference fit with the through hole, and the pencil is interference fit with the fixing hole.

7. The movable flat-bar drawing compass according to claim 3, wherein, The adjusting rod is a telescopic rod.

8. The movable flat-rod drawing compass according to claim 1, characterized in that: A level tester is provided on the top of the adjusting rod.

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