Combined drawing tool

Abstract

The utility model discloses a combined drawing tool, which belongs to the technical field of mathematics teaching and comprises a first ruler and a triangular ruler, a semicircular plate is arranged on the left side of the back of the first ruler, a second ruler is movably connected to an inner cavity of the first ruler, and the second ruler is fixedly connected with the triangular ruler through a bolt. A set of grooves are formed in the bottom of the second ruler, limiting rods are inserted into inner cavities of the grooves, a pull block is fixedly connected to the position, located outside the first ruler, of one end of each limiting rod, and a transverse plate is fixedly connected to the right side of each limiting rod. According to the multifunctional ruler, the semicircular plate and the triangular ruler are respectively arranged on the first ruler, different graphs can be drawn through the semicircular plate and the triangular ruler, and the triangular ruler and the second ruler are fixedly connected through the bolt, so that the triangular ruler can be quickly detached from the second ruler, and a drawing tool required by a user can be replaced; and the practicability of the device is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mathematical teaching technical field, concretely relates to a combination drawing tool. BACKGROUND

[0002] Mathematics plays an important role in education, and mathematics education is one of the important ways to cultivate students' logical thinking, abstract thinking and problem solving ability. Through learning mathematics, students can master the basic knowledge and skills of mathematics and use these knowledge and skills to solve practical problems. When the teacher teaches mathematics, a drawing tool is also needed to draw a picture on the blackboard for teaching.

[0003] The existing drawing tool is simple in structure and can only draw single graphics. When different shapes need to be drawn, the user needs to frequently change different drawing tools, making the drawing work extremely troublesome. Moreover, since the length of the drawing tool is fixed and cannot be adjusted, the use is limited. Therefore, we provide a combination drawing tool. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a combination drawing tool to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a combination drawing tool, comprising a ruler and a protractor, the left side of the back of the ruler is provided with a semicircular plate, the inner cavity of the ruler is movably connected with a second ruler, the connecting part of the second ruler and the protractor is fixedly connected through a bolt, a group of grooves are formed in the bottom of the second ruler, a limiting rod is inserted into the inner cavity of the groove, one end of the limiting rod and outside the ruler is fixedly connected with a pull block, the right side of the limiting rod is fixedly connected with a horizontal plate, and a group of springs are arranged at the bottom of the horizontal plate.

[0006] In the above scheme, the semicircular plate and the protractor are arranged on the ruler, different graphics can be drawn through the semicircular plate and the protractor, and the protractor and the second ruler are fixedly connected through a bolt. Therefore, the protractor can be quickly removed from the second ruler, so that the drawing tool needed by the user can be replaced, and the practicability of the device is greatly improved.

[0007] As a preferred embodiment of the combination drawing tool, the front surface of the ruler is provided with a level, and the inner cavity of the level is provided with a glass tube.

[0008] In the above scheme, the position of the bubble in the glass tube is observed. If the bubble is in the middle position, the object is horizontal, and if the bubble is not in the middle position, the object is not horizontal.

[0009] As a preferred implementation of the combination drawing tool, the back of the semicircular plate is provided with a suction cup, and the inside of the suction cup is in a hollow state.

[0010] By means of the suction cup, the semicircular plate can be adsorbed on the blackboard, the friction between the semicircular plate and the blackboard is enhanced, and the semicircular plate is not easy to move randomly during drawing.

[0011] As a preferred implementation of the combination drawing tool, a sliding groove is formed in the top of the inner cavity of the first ruler, and a sliding rod is fixedly connected to the left side of the top of the second ruler, and one end of the sliding rod is in sliding connection with the inner wall of the sliding groove.

[0012] By means of the sliding groove, the movement distance of the second ruler is limited in cooperation with the sliding rod, and the second ruler is prevented from completely separating from the inner cavity of the first ruler.

[0013] As a preferred implementation of the combination drawing tool, the number of springs is two, and the bottom of each spring is fixedly connected to the bottom of the inner cavity of the first ruler.

[0014] By means of the elastic property of the spring, the limiting rod can be quickly reset under the cooperation of the cross plate.

[0015] As a preferred implementation of the combination drawing tool, a guide block is fixedly connected to one side of the cross plate, a guide groove is formed in the bottom of the right side of the inner cavity of the first ruler, and the guide block is in sliding connection with the inner wall of the guide groove.

[0016] By means of the guide groove, the cross plate is assisted to move under the cooperation of the guide block, the shaking of the cross plate during work is reduced, and the stability of the cross plate during movement is greatly improved.

[0017] Compared with the prior art, the combination drawing tool has the following beneficial effects:

[0018] 1. The first ruler is provided with a semicircular plate and a triangular ruler, different patterns can be drawn by means of the semicircular plate and the triangular ruler, the triangular ruler is fixedly connected to the second ruler by means of bolts, the triangular ruler can be quickly removed from the second ruler, the drawing tool required by the user can be replaced, and the practicability of the device is greatly improved.

[0019] 2. The combination drawing tool comprises a first ruler, a second ruler, a semicircular plate, a triangular ruler, a cross plate, a spring, a limiting rod, a guide block, a guide groove, a sliding groove, and a sliding rod. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structural schematic diagram of the utility model;

[0021] Figure 2 It is the second visual angle local schematic diagram of the utility model;

[0022] Figure 3 It is the No. 1 ruler sectional view of the utility model;

[0023] Figure 4 It is the A place enlarged view of the utility model.

[0024] In the drawing: 1, No. 1 ruler; 2, level; 3, semicircle plate; 4, No. 2 ruler; 5, recess; 6, pull block; 7, limit rod; 8, cross plate; 9, spring; 10, suction cup; 11, triangular ruler; 12, bolt. DETAILED DESCRIPTION

[0025] Please refer to Figures 1-4 A combined drawing tool, including No. 1 ruler 1 and triangular ruler 11, see Figure 3 The top of the inner cavity of No. 1 ruler 1 is provided with a sliding groove, the left side of the top of No. 2 ruler 4 is fixedly connected with a sliding rod, and one end of the sliding rod is slidably connected with the inner wall of the sliding groove. Through the arrangement of the sliding groove, the sliding rod is used in cooperation, the moving distance of No. 2 ruler 4 is limited, No. 2 ruler 4 is prevented from completely separating from the inner cavity of No. 1 ruler 1, the left side of the back of No. 1 ruler 1 is provided with a semicircle plate 3, the inner cavity of No. 1 ruler 1 is movably connected with No. 2 ruler 4, the connecting part of No. 2 ruler 4 and triangular ruler 11 is fixedly connected through bolt 12, the bottom of No. 2 ruler 4 is provided with a group of recesses 5, the inner cavity of recess 5 is inserted with limit rod 7, one end of limit rod 7 and located outside No. 1 ruler 1 is fixedly connected with pull block 6, the right side of limit rod 7 is fixedly connected with cross plate 8, see Figure 4 The side of cross plate 8 is fixedly connected with a guide block, the bottom of the right side of the inner cavity of No. 1 ruler 1 is provided with a guide groove, and the guide block is slidably connected with the inner wall of the guide groove. Through the arrangement of the guide groove, the movement of cross plate 8 is assisted under the cooperation of the guide block, the shaking of cross plate 8 during work is reduced, and the stability of cross plate 8 during movement is greatly improved. The bottom of cross plate 8 is provided with a group of springs 9. Because No. 1 ruler 1 is respectively provided with semicircle plate 3 and triangular ruler 11, different drawings can be drawn through semicircle plate 3 and triangular ruler 11. Because triangular ruler 11 and No. 2 ruler 4 are fixedly connected through bolt 12, it can be seen that triangular ruler 11 can be quickly removed from No. 2 ruler 4, so that the drawing tool required by the user can be replaced, and the practicability of the device is greatly improved.

[0026] See Figure 1As shown, the front surface of the first ruler 1 is provided with a level 2, and the inner cavity of the level 2 is provided with a glass tube. The position of the bubble in the glass tube is observed. If the bubble is in the middle position, the object is level, and if the bubble is not in the middle position, the object is not level. See Figure 2 As shown, the back surface of the semicircular plate 3 is provided with a suction cup 10, and the inside of the suction cup 10 is hollow. Through the setting of the suction cup 10, the semicircular plate 3 can be sucked to the blackboard, and the friction between the semicircular plate 3 and the blackboard is enhanced, so that the semicircular plate 3 is not easily moved during drawing. See Figure 4 As shown, the number of springs 9 is two, and the bottom of the spring 9 is fixedly connected to the bottom of the inner cavity of the first ruler 1. By utilizing the elastic property of the spring 9, the limiting rod 7 can be quickly reset under the cooperation of the cross plate 8.

[0027] In use, first, the suction cup 10 on the back of the level 2 is attached to the blackboard, so that the semicircular plate 3 can be sucked to the blackboard, and the friction between the semicircular plate 3 and the blackboard is enhanced, so that the semicircular plate 3 is not easily moved during drawing. When the length of the first ruler 1 needs to be adjusted, the pull block 6 is pinched and pulled down, and the limiting rod 7 is moved downward by the pull block 6 until the end of the limiting rod 7 is separated from the groove 5 and the movement stops. In this process, the cross plate 8 is moved downward by the limiting rod 7, and the spring 9 is pressed by the cross plate 8. When the limiting of the second ruler 4 is released, the protractor 11 is held and pulled to one side, and the second ruler 4 is moved to one side by the protractor 11 until the second ruler 4 is pulled out of the inner cavity of the first ruler 1, thereby changing the length of the first ruler 1. At the same time, the pull block 6 is released, and the cross plate 8 is reset by utilizing the elastic property of the spring 9. The limiting rod 7 is moved upward by the cross plate 8 until the limiting rod 7 is inserted into the groove 5 again, and the second ruler 4 is limited again to prevent the second ruler 4 from sliding during use. Finally, because the first ruler 1 is respectively provided with the semicircular plate 3 and the protractor 11, different figures can be drawn by the semicircular plate 3 and the protractor 11. Since the protractor 11 and the second ruler 4 are fixedly connected by the bolt 12, the protractor 11 can be quickly removed from the second ruler 4, so that the drawing tool required by the user can be replaced, thereby greatly improving the practicality of the device.

Claims

1. A combination drawing tool characterized by: The utility model relates to a set of ruler, including a straight ruler (1) and a triangular ruler (11), the left side of the back of straight ruler (1) is equipped with semicircle board (3), the inner chamber of straight ruler (1) is movably connected with second straight ruler (4), the connecting place of second straight ruler (4) and triangular ruler (11) is fixedly connected through bolt (12), the bottom of second straight ruler (4) is equipped with a group of recess (5), the inner chamber of recess (5) is inserted with limiting rod (7), one end of limiting rod (7) and the outside fixed connection of straight ruler (1) has pull block (6), the right side of limiting rod (7) is fixedly connected with horizontal plate (8), the bottom of horizontal plate (8) is equipped with a group of spring (9).

2. A combination drawing tool as claimed in claim 1, wherein: The front surface of the straight ruler (1) is provided with a level (2), and the inner cavity of the level (2) is provided with a glass tube.

3. A combination drawing tool as defined in claim 1, wherein: The back surface of the semicircle board (3) is provided with a suction disc (10), and the inside of the suction disc (10) is hollow.

4. A combination drawing tool as defined in claim 1, wherein: The top of the inner cavity of the straight ruler (1) is provided with a sliding groove, and the left side of the top of the second straight ruler (4) is fixedly connected with a sliding rod, and one end of the sliding rod is slidably connected with the inner wall of the sliding groove.

5. A combination drawing tool as defined in claim 1, wherein: The number of the spring (9) is two, and the bottom of the spring (9) is fixedly connected to the bottom of the inner cavity of the straight ruler (1).

6. A combination drawing tool as defined in claim 1, wherein: One side of the horizontal plate (8) is fixedly connected with a guide block, and the bottom of the right side of the inner cavity of the straight ruler (1) is provided with a guide groove, and the guide block is slidably connected with the inner wall of the guide groove.

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