CN218750047U

CN218750047U - Dotted line auxiliary diagraph of engineering drawing teaching aid

Info

Publication number: CN218750047U
Application number: CN202221476381.7U
Authority: CN
Inventors: 李云平; 贺春桃
Original assignee: WUHAN VOCATIONAL COLLEGE OF SOFTWARE AND ENGINEERING
Current assignee: WUHAN VOCATIONAL COLLEGE OF SOFTWARE AND ENGINEERING
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2023-03-28
Anticipated expiration: 2032-06-14

Abstract

The utility model discloses a dotted line auxiliary diagraph of an engineering drawing teaching aid, which comprises a triangular diagraph plate, wherein a straight line edge of the triangular diagraph plate is hollowed out along the length direction to form a dotted line diagraph groove, the bottom of the dotted line diagraph groove is provided with a plurality of horizontal chalk shielding pieces in an equidistant array along the length direction, and gaps with certain intervals are formed between every two adjacent chalk shielding pieces; the two ends of each chalk shielding piece are respectively provided with a front gentle slope or a rear gentle slope; the utility model discloses a space of certain interval all forms between the adjacent chalk shielding piece, when the chalk slides to the chalk shielding piece, can not flow down the vestige on the blackboard, and slide to the space and can flow down the vestige on the blackboard, and the chalk shielding piece is the equidistance and distributes, therefore can draw the dotted line of interval uniformity on the blackboard; the front gentle slope or the rear gentle slope enables chalk to slide on the chalk shielding piece from the gap more smoothly, and therefore smoothness of drawing of the dotted line is improved.

Description

Dotted line auxiliary diagraph of engineering drawing teaching aid

Technical Field

The utility model belongs to the teaching aid field.

Background

When the engineering drawing is drawn manually on the blackboard, the general straight lines, circles and other regular-shaped 'solid lines' are assisted by specific teaching aids, the drawn standard degree and the drawn impression can be guaranteed, but when the broken lines or broken line lines are drawn on the blackboard, the broken points are difficult to process uniformly or much time is consumed due to the fact that no specific teaching aids assist is provided.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome exist not enough among the prior art, the utility model provides a ware of drawing is assisted to engineering drawing teaching aid's dotted line, the dotted line interval of drawing is even, and the straightness accuracy is high.

The technical scheme is as follows: in order to achieve the above object, the utility model discloses a ware of drawing is assisted to dotted line of engineering drawing teaching aid, including the triangle board of drawing, its characterized in that: a broken line drawing groove is hollowed in the length direction of one straight line edge of the triangular drawing plate, a plurality of horizontal chalk shielding pieces are arrayed at equal intervals in the length direction at the bottom of the broken line drawing groove, and gaps with certain intervals are formed between every two adjacent chalk shielding pieces; and the two ends of each chalk shielding piece are respectively provided with a front gentle slope or a rear gentle slope.

The auxiliary drawing device for the chalk dotted line is further arranged, the chalk dotted line is carried by the auxiliary drawing device for the chalk dotted line, and the auxiliary drawing device for the chalk dotted line can move along the length direction of the dotted line drawing groove;

when the side, close to the chalk shielding piece, of the triangular drawing board is attached to the blackboard, when the chalk broken line auxiliary drawing device moves along the length direction of the broken line drawing groove, chalk marks distributed in an equidistant array are left on the blackboard at each gap by the aid of the chalk broken line auxiliary drawing device.

Furthermore, sliding grooves are formed in the two sides in the dotted line drawing groove along the length direction, and the chalk dotted line auxiliary drawing device does linear displacement under the constraint of the two sliding grooves.

Furthermore, the chalk dotted line auxiliary diagraph comprises a sliding ring in a dotted line plotting groove, and chalk is coaxially and movably sleeved on the inner ring of the sliding ring; both sides of the slip ring slide in the slide grooves on both sides of the dotted drawing groove.

Furthermore, a chalk pressing plate is coaxially arranged at the upper end of the sliding ring, and the chalk pressing plate is connected with the sliding ring through a pull-back spring; the chalk pressing sheet is pressed against the top end of the chalk under the pull-back action of the pull-back spring.

Furthermore, the upper end of the slip ring is coaxially and integrally connected with a handheld cylinder, and a top cap is fixed at the top of the handheld cylinder; the chalk pressing plate and the pull-back spring are both in the wrapping range of the handheld barrel.

Has the advantages that: the utility model discloses a space of certain interval all forms between the adjacent chalk shielding piece, when the chalk slides to the chalk shielding piece, can not flow down the vestige on the blackboard, and slide to the space and can flow down the vestige on the blackboard, and the chalk shielding piece is the equidistance and distributes, therefore can draw the dotted line of interval uniformity on the blackboard; the front gentle slope or the rear gentle slope enables the chalk to slide on the chalk shielding piece from the gap more smoothly, so that the smoothness of drawing the dotted line is improved; the chalk dotted line auxiliary diagraph makes linear displacement under the constraint of the two sliding grooves, so that the straightness of the drawn dotted line is effectively guaranteed.

Drawings

FIG. 1 is a comparison of a dotted line drawn by hand and drawn with the aid of the tool;

FIG. 2 is an overall schematic view of the tool;

FIG. 3 is a first cross-sectional view of FIG. 2;

FIG. 4 is an enlarged partial schematic view of FIG. 3;

FIG. 5 is a second cross-sectional view of FIG. 2;

FIG. 6 is an enlarged partial schematic view of FIG. 5;

FIG. 7 is a schematic diagram of a chalk broken line auxiliary plotter.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The dotted line auxiliary diagraph of the engineering drawing teaching aid shown in the attached drawings 1 to 7 comprises a triangular diagraph 1 as shown in fig. 2, a straight line edge 4 of the triangular diagraph 1 is hollowed with a dotted line drawing groove 3 along the length direction, the bottom of the dotted line drawing groove 3 is provided with a plurality of horizontal chalk shielding pieces 11 at equal intervals along the length direction as shown in fig. 3 and 4, gaps 9 with certain intervals are formed between every two adjacent chalk shielding pieces 11, when a chalk slides onto the chalk shielding pieces 11, the chalk cannot flow down on the blackboard, and when the chalk slides onto the gaps 9, the chalk shielding pieces 11 flow down on the blackboard, and the chalk shielding pieces 11 are distributed at equal intervals, so that dotted lines with even intervals can be drawn on the blackboard no matter whether a subsequent chalk dotted line auxiliary diagraph 12 is used; meanwhile, two ends of each chalk shielding piece 11 are respectively provided with a front gentle slope 11.1 or a rear gentle slope 11.2; the front gentle slope 11.1 or the rear gentle slope 11.2 enables chalk to slide on the chalk shielding piece 11 from the gap 9 more smoothly, so that the smoothness of drawing a dotted line is improved;

as shown in fig. 6, the auxiliary drawing device 12 for the chalk dotted line is further included, the chalk 10 is carried on the auxiliary drawing device 12 for the chalk dotted line, the auxiliary drawing device 12 for the chalk dotted line can move along the length direction of the dotted line drawing groove 3, sliding grooves 5 are formed in the two sides in the dotted line drawing groove 3 along the length direction, and the auxiliary drawing device 12 for the chalk dotted line makes linear displacement under the constraint of the two sliding grooves 5, so that the straightness of the drawn dotted line is effectively guaranteed; when one surface of the triangular drawing board 1 close to the chalk shielding piece 11 is attached to a blackboard, the chalk broken line auxiliary drawing device 12 carries chalk 10 to leave chalk marks distributed in an equidistant array on the blackboard at each gap 9 when the chalk broken line auxiliary drawing device 12 moves along the length direction of the broken line drawing groove 3.

As shown in fig. 7, the chalk broken line auxiliary plotter 12 comprises a sliding ring 7 in a broken line plotting groove 3, wherein the inner ring 15 of the sliding ring 7 is coaxially and movably sleeved with chalk 10; both sides of the slip ring 7 slide in the slide grooves 5 on both sides of the dashed drawing groove 3.

A chalk pressing sheet 12 is coaxially arranged at the upper end of the sliding ring 7, and the chalk pressing sheet 12 is connected with the sliding ring 7 through a pull-back spring 13; the chalk pressing plate 12 presses the top end of the chalk 10 under the pull-back action of the pull-back spring 13, the other end of the chalk 10 is pressed against any chalk shielding plate 11 when the chalk is not used, and the other end of the chalk 10 has certain pressing force on a blackboard during drawing, so that the drawing definition is guaranteed. The upper end of the slip ring 7 is coaxially and integrally connected with a handheld barrel 6, and the top of the handheld barrel 6 is fixedly provided with a top cap 6.1; the chalk pressure plate 12 and the pull-back spring 13 are both within the packaging of the hand-held barrel 6.

The using method comprises the following steps:

when the chalk cover is idle, one end of the chalk 10 is pressed against one end of the chalk pressing sheet 12, and the other end of the chalk is pressed against any chalk shielding sheet 11, so that the pull-back spring 13 is in a stretching state;

when a dotted line is drawn, one surface, close to a chalk shielding piece 11, of a triangular drawing board 1 is attached to a blackboard, then a handheld barrel 6 on a chalk dotted line auxiliary drawing device 12 is held by hands, the chalk dotted line auxiliary drawing device 12 moves along the length direction of a dotted line drawing groove 3, when a chalk slides onto the chalk shielding piece 11, marks cannot flow down on the blackboard, but flow down on the blackboard when sliding to a gap 9, the chalk shielding pieces 11 are distributed at equal intervals, chalk marks distributed in an equal array are left on the blackboard at each gap 9 by chalk 10 carried on the chalk dotted line auxiliary drawing device 12, and therefore the dotted lines with uniform intervals and high straightness are drawn on the blackboard; meanwhile, the front gentle slope 11.1 or the rear gentle slope 11.2 enables chalk to slide on the chalk shielding piece 11 from the gap 9 more smoothly, and therefore smoothness of drawing of the dotted line is improved.

The above description is only a preferred embodiment of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention, and are intended to be within the scope of the invention.

Claims

1. The utility model provides a supplementary diagraph of dotted line of engineering drawing teaching aid, includes triangle drawing board (1), its characterized in that: a broken line drawing groove (3) is hollowed in the length direction of one straight line edge (4) of the triangular drawing board (1), a plurality of horizontal chalk shielding pieces (11) are arrayed at the bottom of the broken line drawing groove (3) at equal intervals in the length direction, and gaps (9) with certain intervals are formed between every two adjacent chalk shielding pieces (11); two ends of each chalk shielding piece (11) are respectively provided with a front gentle slope (11.1) or a rear gentle slope (11.2);

sliding grooves (5) are arranged on two sides in the dotted line drawing groove (3) along the length direction; the chalk box also comprises a slip ring (7) in the dotted line drawing groove (3), and the inner ring (15) of the slip ring (7) is coaxially and movably sleeved with the chalk (10); both sides of the slip ring (7) slide in the sliding grooves (5) on both sides of the dotted drawing groove (3);

the upper end of the slip ring (7) is coaxially provided with a chalk pressing sheet (12), and the chalk pressing sheet (12) is connected with the slip ring (7) through a pull-back spring (13); the chalk pressing sheet (12) is pressed against the top end of the chalk (10) under the pull-back action of the pull-back spring (13).

2. The dotted line auxiliary diagraph of an engineering drawing teaching aid according to claim 1, wherein: the upper end of the slip ring (7) is coaxially and integrally connected with a handheld cylinder (6), and a top cap (6.1) is fixed at the top of the handheld cylinder (6); the chalk pressing plate (12) and the pull-back spring (13) are both in the wrapping range of the handheld barrel (6).