Combined drawing tool

Abstract

The utility model provides a combined drawing tool which comprises a first ruler body, a second ruler body, a fixed suction cup and a connecting device, the second ruler body comprises a semicircular part, a straight ruler part and a connecting part, the connecting part is connected with the fixed suction cup, and the connecting device is connected with the fixed suction cup. The first ruler body covers the second ruler body and intersects with the semicircular part at the circle center position, a hole penetrating through the two ruler bodies is formed in the circle center position, and the two ruler bodies are hinged together through the connecting device and the hole. According to the multifunctional compasses, the compasses, the ruler and the protractor are combined together, so that tools do not need to be replaced frequently during drawing, the operation complexity is reduced, and various drawing tools are combined together, so that the drawing tools are convenient to store and carry.

Description

Technical Field

[0001] This utility model relates to the field of teaching aids technology, and in particular to a combined drawing tool. Background Technology

[0002] With the development of technology, the demand for drawing tools in fields such as education and design has been increasing, and the types of drawing tools have also become more and more diverse. Common drawing tools include set squares, compasses, protractors, and other drawing tools. Unlike paper and pen drawing, these drawing tools often need to be set up on the blackboard for drawing in teaching.

[0003] Existing teaching drawing tools have limited functionality and often require frequent replacement or combination during actual use, increasing operational complexity. Furthermore, the various shapes and sizes of these drawing tools make them difficult to store or carry, causing considerable inconvenience to drawing personnel. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a portable, modular drawing tool that can handle various drawing situations.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a combined drawing tool, comprising a first ruler, a second ruler, a fixed suction cup, and a connecting device. The second ruler comprises a semicircular portion, a straight ruler portion, and a connecting portion. The connecting portion is connected to the fixed suction cup. The first ruler covers the second ruler and intersects the semicircular portion at the center. A hole penetrating both rulers is provided at the center. The two rulers are hinged together with the hole through the connecting device.

[0006] Preferably, the first ruler body includes a pointer portion, a ruler portion, a fixing knob, and a fixing hole. One end of the pointer portion is a triangle pointing to the angle scale line on the surface of the semicircular portion. The boundary between the pointer portion and the ruler portion is the through hole corresponding to the center of the semicircle of the second ruler body. The surface of the ruler portion is printed with length scale lines, and the zero point is located at one end of the fixing knob. The side of the ruler portion has a hole that is threaded to the fixing knob. The top surface of the ruler portion has the fixing hole into which chalk can be inserted as the drawing end of a compass.

[0007] Preferably, the second ruler body includes a semicircular portion, a straight portion, and a connecting portion. The diameter of the semicircular portion is the same as one end of the straight portion. A through hole is provided at the center of the semicircular portion, and angle scale lines are provided on the surface. The surface of the straight portion is provided with length scale lines, and the zero point is located at one end of the connecting portion. The connecting portion is a sphere used to connect the fixed suction cup as the fixed end of the compass.

[0008] Preferably, the fixing suction cup is made of transparent material and has a groove at one end, which is connected to the second ruler body through the connecting part.

[0009] Preferably, the connecting device includes a hollow bolt and a hollow nut. The hollow bolt passes through the reserved holes of the first ruler body and the second ruler body and is combined with the hollow nut to fix the two ruler bodies. The hollow nut has a T-shaped thread portion that can completely cover the portion of the hollow bolt in the reserved hole.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The first ruler can be used as a ruler due to its straight structure and surface length scale lines. Similarly, the second ruler can also be used as a ruler. When the two rulers are combined, the angle can be measured by the angle scale lines of the semicircle based on the principle that the vertical angles are equal. (2) The end of the first ruler near the fixed knob is inserted with chalk as the drawing end, and the second ruler is connected to the fixed suction cup and adsorbed on the blackboard as the fixed end. When the two rulers are combined, they can be used as a compass. (3) The hollow design of the connecting device can hang and place this drawing tool. The detachable structure allows the two rulers to be used separately, making this drawing tool convenient to store and carry. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram of a combined drawing tool according to the present invention;

[0012] Figure 2 This is a schematic diagram of the first ruler structure of a combined drawing tool according to this utility model;

[0013] Figure 3 This is a schematic diagram of the second ruler structure of a combined drawing tool according to this utility model;

[0014] Figure 4 This is a schematic diagram of the connecting device structure of a combined drawing tool according to this utility model. Detailed Implementation

[0015] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Figure 1 As shown, a combined drawing tool includes a first ruler 1, a second ruler 2, a fixed suction cup 3, and a connecting device 4. The second ruler 2 includes a semicircular portion 201, a straight ruler portion 202, and a connecting portion 203. The connecting portion 203 is connected to the fixed suction cup 3. The first ruler 1 covers the second ruler 2 and intersects the semicircular portion 201 at the center. A hole is provided at the center of the circle, through which the two rulers pass. The two rulers are hinged together with the hole by the connecting device 4.

[0016] like Figure 2 As shown, the first ruler 1 includes a pointer portion 101, a ruler portion 102, a fixing knob 103, and a fixing hole 104. One end of the pointer portion 101 is a triangle pointing to the angle scale line on the surface of the semicircular portion 201. The boundary between the pointer portion 101 and the ruler portion 102 is the through hole corresponding to the center of the semicircle of the second ruler 2. The surface of the ruler portion 102 is printed with length scale lines, and the zero point is located at a section of the fixing knob 103. This allows the first ruler 1 to be used as a ruler. The side of the first ruler 1 has a hole that is threaded to the fixing knob 103. The top surface of the ruler portion 102 has the fixing hole 104, into which chalk can be inserted to serve as the drawing end of a compass.

[0017] like Figure 3 As shown, the second ruler 2 includes a semicircular portion 201, a ruler portion 202, and a connecting portion 203. The diameter of the semicircular portion 201 is the same as one end of the ruler portion 202. A through hole is provided at the center of the semicircle, and angle scale lines are provided on the surface, so that the second ruler 2 can be used as a protractor. The surface of the ruler portion is provided with length scale lines, and the zero point is located at one end of the connecting portion, so that the second ruler 2 can be used as a ruler. The connecting portion is a sphere used to connect the fixed suction cup 3 as the fixed end of a compass.

[0018] like Figure 4 As shown, the connecting device 4 includes a hollow bolt 401 and a hollow nut 402. The hollow bolt 401 passes through the reserved holes of the first ruler body 1 and the second ruler body 2 and is combined with the hollow nut 402 to fix the two ruler bodies. The hollow nut 402 has a T-shaped thread that can completely cover the part of the hollow bolt 401 in the reserved hole.

[0019] Usage: This drawing tool can be operated in different ways depending on different needs. When used as a ruler, the hollow bolt 401 and hollow nut 402 of the connecting device 4 can be separated. The ruler part 102 of the first ruler body 1 or the ruler part 202 of the second ruler body 2 can be placed in the required position to operate as a ruler. Alternatively, the first ruler body 1 can be rotated to coincide with the second ruler body 2 after the connecting device 4 is assembled together. At the same time, the two ruler parts also coincide, so that it can be used as a ruler. The fixing suction cup 3 can be installed on the connecting part 203 of the second ruler body 2 so that the fixing suction cup 3 can be attached to the blackboard.

[0020] Furthermore, when used as a compass, the chalk is inserted into the fixing hole 104 of the first ruler 1, and the fixing knob 103 is rotated to further fix the position of the chalk. The second ruler 2 is used as the fixing axis and the first ruler 1 is used as the rotation axis to draw a circle.

[0021] Furthermore, when used as a protractor, align the center hole of the connecting device 4 with the center of the circle on the blackboard and make the diameter of the semicircular part 201 of the second ruler 2 coincide with one side of the angle to be measured. Rotate the first ruler 1 so that its pointer part 101 coincides with the other side of the angle to be measured. The value of the measured angle can be known through the angle scale line on the semicircular part 201.

[0022] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A combined drawing tool, comprising a first ruler, a second ruler, a fixed suction cup, and a connecting device, characterized in that: The second ruler includes a semicircular portion, a ruler portion, and a connecting portion. The connecting portion is connected to the fixed suction cup. The first ruler covers the second ruler and intersects the semicircular portion at the center. A hole is provided at the center of the semicircular portion, through which the two rulers pass. The two rulers are hinged together with the hole via the connecting device. The first ruler includes a pointer portion, a ruler portion, a fixed knob, and a fixed hole. One end of the pointer portion is a triangle pointing to the angle scale line on the surface of the semicircular portion. The boundary between the pointer portion and the ruler portion is the through hole corresponding to the center of the semicircle of the second ruler. The surface of the ruler portion is printed with length scale lines, and the zero point is located at one end of the fixed knob. A hole is provided on the side of the ruler portion, which is connected to the fixed knob by a thread. The top surface of the ruler portion has the fixed hole, into which chalk can be inserted as the drawing end of a compass.

2. The combined drawing tool as described in claim 1, characterized in that: The diameter of the semicircular part is the same as one end of the ruler part. A through hole is provided at the center of the circle, and angle scale lines are provided on the surface. The ruler part has length scale lines on its surface, and the zero point is located at one end of the connecting part. The connecting part is a sphere used to connect the fixed suction cup as the fixed end of the compass.

3. The combined drawing tool as described in claim 1, characterized in that: The fixed suction cup is made of transparent material and has a groove at one end, which is connected to the second ruler body through the connecting part.

4. A combined drawing tool as described in claim 1, characterized in that: The connecting device includes a hollow bolt and a hollow nut. The hollow bolt passes through the reserved holes of the first ruler body and the second ruler body and is combined with the hollow nut to fix the two ruler bodies. The hollow nut has a T-shaped thread that can completely cover the part of the hollow bolt in the reserved hole.

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