Drawing ruler

Abstract

The utility model relates to the technical field of primary school teaching aids, and discloses a drawing ruler which comprises a bearing ruler plate, limiting holes are formed in the upper side and the lower side of the front face of the bearing ruler plate respectively, a limiting assembly is arranged in each limiting hole, each limiting assembly comprises a limiting pipe, the inner wall of each limiting pipe is provided with a supporting protruding ring, and the supporting protruding rings are arranged on the inner walls of the limiting pipes respectively. A reset spring is clamped to the front face of each supporting convex ring, and a pressing end cap is arranged at the front end of each reset spring. According to the drawing ruler, through the limiting assembly, the pressing end cap moves along the limiting pipe, the pressing end cap drives the limiting suction cup to move towards the blackboard side through the extension rod, air in the limiting suction cup is exhausted after the limiting suction cup makes contact with the blackboard, vacuum suction force is generated between the limiting suction cup and the blackboard in the process, and the device and the blackboard are fixed through the vacuum suction force; and the displacement distance of the operation gap of the device is greatly reduced, the preparation time before operation of the device is effectively shortened, and therefore the practicability of the device is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of primary school teaching aids, in particular to a drawing ruler. Background Art

[0002] A drawing ruler is a device used to assist in drawing line segments or measuring lengths, and is widely used in the technical field of primary school teaching aids. When using a drawing ruler in the prior art, the device is first placed at a set position on the blackboard. After the device is firmly placed, its own straight structure is used to assist in drawing line segments with chalk, or the device is placed on the blackboard until the set line segment is reached. After the device is firmly placed, the line segment is measured using a ruler provided on its surface. However, since the operating range of the device is mainly in the blackboard area, the device needs to be constantly moved between the placement position and the blackboard during operation, which increases the preparation time before the device operates, thereby affecting the practicability of the device.

[0003] Based on this, the utility model designs a drawing ruler to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a drawing ruler, which solves the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drawing ruler, comprising a bearing ruler plate, wherein both upper and lower sides of the front side of the bearing ruler plate are provided with limit holes, each group of the limit holes is provided with a limit assembly inside, each group of the limit assemblies comprises a limit tube, the inner wall of each group of the limit tubes is provided with a supporting convex ring, the front side of each group of the support convex rings is clamped with a reset spring, the front end of each group of the reset springs is provided with a clamping end cap, the inner wall of each group of the clamping end caps is screwed with an extension rod, and the rear end of each group of the extension rods is provided with a limit sucker, a measuring embedded groove is provided on the left side of the front side of the bearing ruler plate, a measuring ruler strip is provided inside the measuring embedded groove, an auxiliary embedded groove is provided on the right side of the front side of the bearing ruler plate, an auxiliary ruler strip is provided inside the auxiliary embedded groove, two groups of balancing holes are provided on the front side of the bearing ruler plate, a tensioning ring is provided on the inner wall of each group of the balancing holes, a longitudinal level tube is provided inside the upper tensioning ring, and a transverse level tube is provided inside the lower tensioning ring.

[0008] Preferably, the outer surface of the load-bearing scale plate is provided with a plurality of groups of anti-collision embedded grooves, and an anti-collision angle seat is arranged inside each group of the anti-collision embedded grooves.

[0009] Preferably, a placement auxiliary hole is opened on the front side of the load-bearing scale plate, and a magnetic attraction ring is installed on the inner wall of the placement auxiliary hole by interference fit.

[0010] Preferably, a reinforcement ring is installed on the inner wall of the magnetic attraction ring by interference fit, and the wall thickness of the reinforcement ring is between 1.5 mm and 2.5 mm.

[0011] Preferably, a plurality of groups of trapezoidal auxiliary grooves are provided on the left side and the right side of the load-bearing ruler plate, and the maximum thickness of each group of the trapezoidal auxiliary grooves is half of the thickness of the load-bearing ruler plate.

[0012] Preferably, a guide plate is provided on the front side of each group of the clamping end caps, and a guide mark is provided on the front side of each group of the guide plates.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides a drawing ruler, which has the following beneficial effects:

[0015] 1. The drawing ruler uses a limit assembly to move the clamping end cap along the limit tube. The clamping end cap drives the limit suction cup to move toward the blackboard through the extension rod. After the limit suction cup contacts the blackboard, the air inside is discharged. During this process, vacuum suction is generated between the limit suction cup and the blackboard. The vacuum suction fixes the device to the blackboard, greatly reducing the displacement distance of the device operation gap, effectively shortening the preparation time before the device operation, thereby enhancing the practicability of the device.

[0016] 2. The drawing ruler uses a longitudinal level tube and a transverse level tube. When the device needs to draw a horizontal or vertical line segment, the position of the device is adjusted according to the transverse level tube or the longitudinal level tube in the tensioning ring. The bearing ruler plate is set in a horizontal or vertical state on the blackboard before drawing. This effectively improves the convenience of the device in drawing horizontal or vertical line segments, greatly enhances the adaptability of the device to different drawing requirements, and thus enhances the practicability of the device.

[0017] 3. The drawing ruler uses a measuring ruler and an auxiliary ruler. When the device needs to perform a measurement operation, first align one end of the measuring ruler on the load-bearing scale plate with the line segment, and then use the measuring ruler to measure the line segment in metric units. Next, align one end of the auxiliary ruler on the load-bearing scale plate with the line segment, and then use the auxiliary ruler to measure the line segment in expanded units, thereby effectively conveying the conversion relationship between metric units and expanded units to students, effectively improving the functionality of the device, thereby enhancing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2It is a front view of the structure of the utility model;

[0020] Figure 3 It is a schematic exploded view of the three-dimensional structure of the structural limiting component of the utility model.

[0021] In the figure: 1. load-bearing scale plate; 2. limit assembly; 3. limit tube; 4. supporting convex ring; 5. reset spring; 6. clamping end cap; 7. extension rod; 8. limit suction cup; 9. measuring scale bar; 10. auxiliary scale bar; 11. tensioning ring; 12. longitudinal level tube; 13. anti-collision angle seat; 14. magnetic suction ring; 15. reinforcement ring; 16. trapezoidal auxiliary groove; 17. guide sign; 18. horizontal level tube. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3The utility model provides a technical solution: a drawing ruler, including a bearing ruler plate 1, the upper and lower sides of the front side of the bearing ruler plate 1 are provided with limit holes, and each group of limit holes is provided with a limit assembly 2 inside. Through the limit assembly 2, the clamping end cap 6 moves along the limit tube 3, and the clamping end cap 6 drives the limit suction cup 8 to move toward the blackboard side through the extension rod 7. After the limit suction cup 8 contacts the blackboard, the air inside the limit suction cup 8 is discharged. In this process, vacuum suction is generated between the limit suction cup 8 and the blackboard, and the vacuum suction fixes the device and the blackboard, which greatly reduces the displacement distance of the device operation gap and effectively shortens the device before operation. Preparation time is long, thereby enhancing the practicality of the device, each group of limiting components 2 includes a limiting tube 3, the inner wall of each group of limiting tube 3 is provided with a supporting convex ring 4, the front of each group of supporting convex ring 4 is clamped with a reset spring 5, the front end of each group of reset spring 5 is provided with a clamping end cap 6, the inner wall of each group of clamping end cap 6 is screwed with an extension rod 7, and the rear end of each group of extension rod 7 is provided with a limiting suction cup 8, a measuring embedded groove is opened on the left side of the front of the load-bearing scale plate 1, and a measuring ruler 9 is arranged inside the measuring embedded groove, and an auxiliary embedded groove is opened on the right side of the front of the load-bearing scale plate 1, and an auxiliary ruler 1 is arranged inside the auxiliary embedded groove. 0, through the measuring ruler 9 and the auxiliary ruler 10, when the device needs to perform a measurement operation, first align one end of the measuring ruler 9 on the load-bearing ruler plate 1 with the line segment, and then use the measuring ruler 9 to measure the line segment in metric units, then align one end of the auxiliary ruler 10 on the load-bearing ruler plate 1 with the line segment, and then use the auxiliary ruler 10 to measure the line segment in extended units, thereby effectively conveying the conversion relationship between metric units and extended units to students, effectively improving the functionality of the device, thereby enhancing the practicality of the device, two sets of balancing holes are opened on the front of the load-bearing ruler plate 1, and the inner wall of each set of balancing holes Both are provided with a tensioning ring 11, a longitudinal leveling tube 12 is provided inside the upper tensioning ring 11, and a transverse leveling tube 18 is provided inside the lower tensioning ring 11. Through the longitudinal leveling tube 12 and the transverse leveling tube 18, when the device needs to draw a horizontal or vertical line segment, the position of the device is adjusted according to the transverse leveling tube 18 or the longitudinal leveling tube 12 in the tensioning ring 11, and the drawing operation is carried out after the load-bearing ruler 1 is set in a horizontal or vertical state on the blackboard, which effectively improves the convenience of the device in drawing horizontal or vertical line segments, greatly enhances the adaptability of the device to different drawing requirements, and thus enhances the practicability of the device.

[0024] In the utility model, in order to reduce the probability of damage to the device during the impact, a plurality of groups of anti-collision embedded grooves are provided on the outer surface of the load-bearing scale plate 1, and an anti-collision corner seat 13 is provided inside each group of anti-collision embedded grooves for offsetting the impact force generated during the impact through its own elastic deformation, thereby reducing the probability of damage to the device during the impact.

[0025] In the utility model, in order to improve the convenience during the placement of the device, a placement auxiliary hole is opened on the front side of the load-bearing scale plate 1, and a magnetic ring 14 is installed on the inner wall of the placement auxiliary hole by interference fit to fix the device to the set position by magnetic attraction. At the same time, the magnetic ring 14 fixes the device by hooking with the hanging position, thereby improving the convenience during the placement of the device.

[0026] In the utility model, in order to extend the effective service life of the magnetic attraction ring 14, a reinforcement ring 15 is installed on the inner wall of the magnetic attraction ring 14 by interference fit to improve the contact surface strength between the magnetic attraction ring 14 and the hook. The wall thickness of the reinforcement ring 15 is between 1.5 mm and 2.5 mm, thereby extending the effective service life of the magnetic attraction ring 14.

[0027] In the present invention, in order to improve the convenience during the moving process, multiple groups of trapezoidal auxiliary grooves 16 for providing gripping positions during the moving process are provided on the left and right sides of the load-bearing scale plate 1. The maximum thickness of each group of trapezoidal auxiliary grooves 16 is half the thickness of the load-bearing scale plate 1, thereby improving the convenience during the moving process.

[0028] In the utility model, in order to improve the convenience during the operation of the device, a guide sign 17 is provided on the front of each group of clamping end caps 6, and a guide mark is provided on the front of each group of guide signs 17. Through the guide marks provided on the front of the guide signs 17, teaching personnel can quickly determine the driving position of the device, thereby improving the convenience during the operation of the device.

[0029] When in use, the device is first placed in a set position on the blackboard surface, and then drawing or measuring operations are performed on the blackboard surface. When the device needs to draw a horizontal or vertical line segment, the position of the device is adjusted according to the horizontal level tube 18 or the vertical level tube 12 in the tensioning ring 11, and the drawing operation is performed after the bearing scale plate 1 is set at a horizontal or vertical state on the blackboard. When the device needs to perform a measurement operation, first align one end of the measuring ruler 9 on the bearing scale plate 1 with the line segment, and then measure the line segment in metric units through the measuring ruler 9, and then align one end of the auxiliary ruler 10 on the bearing scale plate 1 with the line segment, and then measure the line segment in expanded units through the auxiliary ruler 10. Measurements can be made, thereby effectively conveying the conversion relationship between metric units and extended units to students. When the device needs to be temporarily fixed to the surface of the blackboard, the clamping end cap 6 is first driven to move along the limiting tube 3, and the clamping end cap 6 drives the limiting suction cup 8 to move toward the blackboard side through the extension rod 7. After the limiting suction cup 8 contacts the blackboard, the air inside it is discharged. During this process, vacuum suction is generated between the limiting suction cup 8 and the blackboard, and the vacuum suction fixes the device to the blackboard. During this process, the clamping end cap 6 drives the reset spring 5 to elastically deform with the cooperation of the supporting convex ring 4. After the device is separated from the blackboard, the reset spring 5 drives the clamping end cap 6 to reset, and the clamping end cap 6 drives the limiting suction cup 8 to reset through the extension rod 7.

[0030] To sum up, the drawing ruler, through the limiting component 2, makes the clamping end cap 6 move along the limiting tube 3, and the clamping end cap 6 drives the limiting suction cup 8 to move toward the blackboard side through the extension rod 7. After the limiting suction cup 8 contacts with the blackboard, the air inside it is discharged. In this process, vacuum suction is generated between the limiting suction cup 8 and the blackboard, and the vacuum suction fixes the device to the blackboard, which greatly reduces the displacement distance of the device working gap and effectively shortens the preparation time before the device operation, thereby enhancing the practicability of the device.

[0031] The drawing ruler uses the longitudinal level tube 12 and the transverse level tube 18. When the device needs to draw a horizontal or vertical line segment, the position of the device is adjusted according to the transverse level tube 18 or the longitudinal level tube 12 in the tensioning ring 11. The bearing ruler plate 1 is set to a horizontal or vertical state on the blackboard before drawing operations are performed, which effectively improves the convenience of the device in drawing horizontal or vertical line segments, greatly enhances the adaptability of the device to different drawing requirements, and thus enhances the practicability of the device.

[0032] The drawing ruler uses the measuring ruler strip 9 and the auxiliary ruler strip 10. When the device needs to perform a measurement operation, first align one end of the measuring ruler strip 9 on the load-bearing scale plate 1 with the line segment, and then measure the line segment with metric units through the measuring ruler strip 9. Then, align one end of the auxiliary ruler strip 10 on the load-bearing scale plate 1 with the line segment, and then measure the line segment with extended units through the auxiliary ruler strip 10, thereby effectively conveying the conversion relationship between metric units and extended units to students, effectively improving the functionality of the device, and thus enhancing the practicality of the device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drawing ruler, comprising a bearing ruler plate (1), characterized in that: The upper and lower sides of the front side of the load-bearing ruler plate (1) are provided with limit holes, each group of the limit holes is provided with a limit assembly (2), each group of the limit assembly (2) comprises a limit tube (3), the inner wall of each group of the limit tube (3) is provided with a supporting convex ring (4), the front side of each group of the supporting convex ring (4) is clamped with a return spring (5), the front end of each group of the return spring (5) is provided with a clamping end cap (6), the inner wall of each group of the clamping end cap (6) is screwed with an extension rod (7), and the rear end of each group of the extension rod (7) is provided with a limit suction cup. (8) A measuring embedded groove is provided on the left side of the front face of the bearing ruler plate (1), and a measuring scale bar (9) is arranged inside the measuring embedded groove; an auxiliary embedded groove is provided on the right side of the front face of the bearing ruler plate (1), and an auxiliary scale bar (10) is arranged inside the auxiliary embedded groove; two groups of balancing holes are provided on the front face of the bearing ruler plate (1), and a tensioning ring (11) is provided on the inner wall of each group of balancing holes; a longitudinal level tube (12) is provided inside the upper tensioning ring (11), and a transverse level tube (18) is provided inside the lower tensioning ring (11).

2. A drawing ruler according to claim 1, characterized in that: The outer surface of the load-bearing scale plate (1) is provided with a plurality of groups of anti-collision inner embedded grooves, and an anti-collision angle seat (13) is arranged inside each group of the anti-collision inner embedded grooves.

3. A drawing ruler according to claim 1, characterized in that: The front side of the bearing ruler plate (1) is provided with a placement auxiliary hole, and the inner wall of the placement auxiliary hole is installed with a magnetic attraction ring (14) by interference fit.

4. A drawing ruler according to claim 3, characterized in that: A reinforcement ring (15) is installed on the inner wall of the magnetic attraction ring (14) in an interference fit, and the wall thickness of the reinforcement ring (15) is between 1.5 mm and 2.5 mm.

5. A drawing ruler according to claim 1, characterized in that: The left side and the right side of the load-bearing ruler plate (1) are both provided with a plurality of groups of trapezoidal auxiliary grooves (16), and the maximum thickness of each group of the trapezoidal auxiliary grooves (16) is half the thickness of the load-bearing ruler plate (1).

6. A drawing ruler according to claim 1, characterized in that: A guide sign (17) is provided on the front of each group of the clamping end caps (6), and a guide mark is provided on the front of each group of the guide sign (17).

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