CN111873674A - Product design drawing ruler with high practicability - Google Patents

Abstract

The invention relates to the technical field of drawing rules, and discloses a product design drawing rule with strong practicability, which comprises a drawing rule main body, a drawing disc, a drawing auxiliary line and a protractor, wherein the drawing disc is positioned on the left side of the front surface of the drawing rule main body and is fixedly connected with the drawing rule main body; drawing the disc fixing base through setting up, can pressing with the hand and drawing the disc fixing base and rotate and draw disc and drawing rule main part, insert the painting brush and draw the circle on the disc and draw the circle in the supplementary inslot of drawing the circle of seting up, through setting up drawing auxiliary line, the horizontal drawing groove that usable inside was seted up, horizontal drawing divides groove, perpendicular drawing groove and perpendicular drawing and divides the groove, draws parallel lines or the plumb line of relevant size, supplies the product design to use.

Description

A practical product design drawing ruler

technical field

The invention relates to the technical field of drawing rulers, in particular to a highly practical product design drawing ruler.

Background technique

Drawing ruler is a common tool for drawing geometric figures and product design drawings. In product design, it is used together with other drawing tools to draw product design. The drawing ruler is mainly used to draw straight lines on the drawing board, or cooperate with the triangle board to draw straight lines in other directions. Other common drawing tools include drawing boards, compasses, T-squares, etc.

Drawing rulers are often used in product design and drawing. Traditional drawing rulers are mostly used to draw a single straight line, which has a single function and poor practicability. It not only cannot meet the different needs of product design and drawing, but also limits the use of drawing rulers. The edge layer is thin. During use, if it is accidentally dropped and bumped, it will easily cause cracking and damage, which will affect the subsequent use of the drawing ruler.

SUMMARY OF THE INVENTION

(1) Technical problems solved

Aiming at the deficiencies of the prior art, the present invention provides a product design drawing ruler with strong practicability, which solves the problem that the traditional drawing ruler is mostly used to draw a single straight line, has single function and poor practicability, and cannot meet the different product design drawings. The demand also limits the use of the drawing ruler, and the edge layer of the drawing ruler is thin. During use, if it is accidentally dropped and bumped, it is easy to cause cracking and damage, which affects the subsequent use of the drawing ruler.

(2) Technical solutions

In order to achieve the above purpose, the present invention provides the following technical solutions: a practical product design drawing ruler, comprising a drawing ruler main body, a first edge guard, a drawing disc fixing seat, a drawing disc, a drawing auxiliary groove, Angle slot, angle sub-slot, auxiliary hole for drawing circle, auxiliary line for drawing, horizontal drawing slot, horizontal drawing sub-slot, vertical drawing slot, vertical drawing sub-slot, protractor chute, protractor clamp, protractor slider, protractor limit block , a protractor, a second edge guard stop block, a second edge guard insert block and a second edge guard strip, the drawing ruler body penetrates the upper surface of the first edge guard strip, and is locked with the first edge guard strip. The drawing disc fixing seat penetrates the left end of the drawing ruler body and is rotatably connected with the drawing ruler body, the drawing disc fixing seat penetrates the drawing disc, and the drawing disc is located in the The left side of the front surface of the main body of the drawing ruler is fixedly connected with the main body of the drawing ruler. The angle groove is formed on the upper right side of the disc, the angle sub-slot is formed on the left side of the front surface of the drawing ruler body near the inner side of the angle groove, and the left side of the front surface of the drawing ruler body is close to the angle groove The auxiliary hole for drawing circles is opened at the bottom, the auxiliary line for drawing is opened on the front surface of the main body of the drawing ruler, the horizontal drawing groove is opened on the front surface of the main body of the drawing ruler, and the upper right side of the front surface of the main body of the drawing ruler is formed The horizontal drawing sub-slots are opened, the vertical drawing grooves are opened on the front surface of the main body of the drawing ruler, the vertical drawing sub-slots are opened under the front surface of the main body of the drawing ruler, and the right side of the front surface of the main body of the drawing ruler is provided. There is the protractor chute close to the right side of the drawing auxiliary line, the protractor block is located on the left side of the inner upper surface of the protractor chute, the protractor chute is fixedly connected with the main body of the drawing ruler, and the The protractor slider is located on the inner right side of the main body of the drawing ruler and is slidably connected with the main body of the drawing ruler, and the protractor limit block is located on the left side of the front surface of the protractor slider and is fixedly connected with the protractor slider, The protractor penetrates the right side wall of the main body of the drawing ruler, the protractor is fixedly connected with the slider of the protractor, and the second edge protection limit block is located on the upper right side of the front surface of the main body of the drawing ruler, close to the upper part of the protractor , the second edge guard stop block is fixedly connected with the main body of the drawing ruler, the second edge guard insert block is located above the right side wall of the main body of the drawing ruler, and is fixedly connected with the main body of the drawing ruler, the The main body of the drawing ruler penetrates through the lower surface of the second edge protector, and the second edge protector is slidably connected with the main body of the drawing ruler.

Preferably, a fixed seat rotation groove is formed on the left side of the front surface of the main body of the drawing ruler, and the drawing disc fixing seat penetrates the main body of the drawing ruler through the rotation groove of the fixed seat, and is rotatably connected to the main body of the drawing ruler.

Preferably, the shape of the auxiliary circle-drawing groove is arc-shaped, which can draw a circle with a radius of one centimeter, and the front surface of the circular-drawing disk is further provided with a circular-drawing auxiliary sub-slot, which is located on the left side of the front surface of the circular drawing disk. Near the right side of the auxiliary groove for drawing circles, the shape is an arc, and a circle with a diameter of one centimeter can be drawn.

Preferably, the number of the auxiliary holes for drawing circles is four, all of which are located on the left side of the front surface of the main body of the drawing ruler near the bottom of the angle groove, and are opened in sequence from left to right at intervals of one centimeter.

Preferably, the drawing auxiliary lines are composed of seven vertical lines and four horizontal lines, and the distance between them is one centimeter.

Preferably, the number of the horizontal drawing slots is four, which are sequentially overlapped with the left part of the first horizontal line, the left part of the second horizontal line, the left part of the third horizontal line and the left part of the fourth horizontal line of the drawing auxiliary line , the number of the horizontal drawing sub-slots is three, which are respectively located on the right side between the first horizontal line and the second horizontal line of the drawing auxiliary line, and between the second horizontal line and the third horizontal line. On the right side between the third horizontal line and the fourth horizontal line, the vertical drawing slot is opened on the fourth vertical line, the fifth vertical line and the third horizontal line of the drawing auxiliary line, and the vertical drawing slot is divided The number is four, which are respectively located below the drawing auxiliary line between the third vertical line and the fourth vertical line, between the fourth vertical line and the fifth vertical line, and the sixth vertical line and the third vertical line. Below between the seven vertical lines.

Preferably, the number of the protractor blocks is two, which are located on the left side of the inner upper surface and the left side of the inner lower surface of the protractor chute, and are both fixedly connected to the main body of the drawing ruler. The protractor slider and the The protractor and the main body of the drawing ruler are clamped and fixed by the protractor clamping block.

Preferably, a protractor receiving groove is provided on the right side wall of the main body of the drawing ruler, the protractor penetrates through the right side wall of the main body of the drawing ruler through the protractor receiving groove, and is fixedly connected with the protractor slider.

Preferably, a drawing ruler caliper is provided inside the first edge protector, the drawing ruler body penetrates the first edge protector through the drawing ruler caliper, and is engaged with the first edge protector Fixing, a drawing ruler chute is provided inside the second edge protector, and the drawing ruler main body penetrates the second edge protector through the drawing ruler chute, and is slidably connected to the second edge protector.

(3) Beneficial effects

The invention provides a practical product design drawing ruler, which has the following beneficial effects:

(1), the present invention sets the drawing disc fixing seat at the right end of the drawing ruler main body, and the drawing disc and the drawing ruler main body can be rotated by pressing the drawing disc fixing seat by hand, and the brush is inserted into the drawing circle auxiliary groove opened on the drawing disc Inside, draw a circle, or insert a brush into the auxiliary hole for drawing circle, press the holder of the drawing disk with your hand, turn the drawing disk and the main body of the drawing ruler to draw a circle of corresponding size, and set the angle groove on the main body of the drawing ruler to pass the angle. The angle of the corresponding angle can be drawn from the groove, and the angle can also be used to divide the groove. The angle drawn through the angle groove is divided into two equal parts. By setting the drawing auxiliary line on the main body of the drawing ruler, the horizontal drawing groove and horizontal Drawing sub-slots, vertical drawing slots and vertical drawing sub-slots, draw parallel lines or vertical lines of relevant dimensions for product design. By opening the protractor chute on the right side of the front surface of the main body of the drawing ruler, it is convenient to slide and connect the protractor slider and the protractor , it is convenient to use the protractor, and it is convenient to store and protect the protractor when it is not in use. By setting the protractor block, it is convenient for the protractor slider, the protractor and the drawing ruler. The protractor limit block is used to limit the sliding range of the protractor, prevent the protractor from sliding out of the main body of the drawing ruler, enhance the practicability of the drawing ruler, and meet the different needs of product design and drawing.

(2), the present invention protects the edge of the drawing ruler by setting the first edge guard and the second edge guard on the upper surface and the lower surface of the main body of the drawing ruler, preventing bumping damage from falling, and prolonging the service life of the drawing ruler. A drawing ruler chute is set inside the second edge guard, which is convenient for sliding connection between the second edge guard and the main body of the drawing ruler. The edge limit block is used to limit the sliding range of the second edge protector and prevent the second edge protector from sliding out of the main body of the drawing ruler. The second edge protector and the main body of the drawing ruler prevent the second edge protector from sliding and affecting subsequent drawings.

Description of drawings

Fig. 1 is the structural front view of the present invention;

Fig. 2 is the left side view of the structure of the present invention;

Fig. 3 is the right side view of the structure of the present invention;

4 is a schematic diagram of the main structure of the drawing ruler of the present invention;

5 is a schematic diagram of the expanded structure of the second edge protector of the present invention;

FIG. 6 is a schematic diagram of the storage structure of the protractor according to the present invention.

In the figure: 1. Main body of drawing ruler; 2. First edge guard; 3. Drawing disc fixing seat; 4. Drawing disc; 5. Drawing circle auxiliary groove; 6. Angle groove; 7. Angle dividing groove; 8 , auxiliary hole for drawing circle; 9, auxiliary line for drawing; 10, horizontal drawing slot; 11, horizontal drawing slot; 12, vertical drawing slot; 13, vertical drawing slot; 14, protractor chute; 15, protractor block; 16, protractor slider; 17, protractor limit block; 18, protractor; 19, second edge protector limit block; 20, second edge protector insert; 21, second edge protector.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Figures 1-6, the present invention provides a technical solution: a highly practical product design drawing ruler, comprising a drawing ruler main body 1, a first edge guard 2, a drawing disc fixing seat 3, a drawing circle Disk 4, circle drawing auxiliary slot 5, angle slot 6, angle sub-slot 7, circle drawing auxiliary hole 8, drawing auxiliary line 9, horizontal drawing slot 10, horizontal drawing sub-slot 11, vertical drawing slot 12, vertical drawing sub-slot 13 , protractor chute 14, protractor block 15, protractor slider 16, protractor limit block 17, protractor 18, second edge protector limit block 19, second edge protector insert 20 and second edge protector strip 21, drawing The ruler main body 1 penetrates the upper surface of the first edge guard 2 and is fixedly engaged with the first edge protection strip 2. The drawing disc fixing seat 3 penetrates the left end of the drawing ruler main body 1 and is rotatably connected with the drawing ruler main body 1. The drawing disc The fixed seat 3 penetrates the drawing disk 4, and the drawing disk 4 is located on the left side of the front surface of the drawing ruler main body 1, and is fixedly connected with the drawing ruler main body 1. The drawing disk 4 is provided with a drawing auxiliary groove 5 on the left side of the front surface. An angle slot 6 is formed on the upper left side of the front surface of the main body 1 close to the upper right side of the drawing disc 4, an angle sub-slot 7 is formed on the left side of the front surface of the drawing ruler main body 1 near the inner side of the angle groove 6, and the left side of the front surface of the drawing ruler main body 1 is formed. A circle drawing auxiliary hole 8 is opened near the bottom of the angle groove 6, a drawing auxiliary line 9 is opened on the front surface of the drawing ruler main body 1, a horizontal drawing groove 10 is opened on the front surface of the drawing ruler main body 1, and the upper right side of the front surface of the drawing ruler main body 1 is opened with A horizontal drawing sub-slot 11, a vertical drawing slot 12 is formed on the front surface of the main body 1 of the drawing ruler, a vertical drawing sub-slot 13 is formed under the front surface of the main body 1 of the drawing ruler, and a protractor chute 14 is formed on the right side of the front surface of the main body 1 of the drawing ruler. On the right side of the auxiliary line 9, the protractor block 15 is located on the left side of the inner upper surface of the protractor chute 14, the protractor chute 14 is fixedly connected with the main body 1 of the drawing ruler, and the protractor slider 16 is located on the right side of the main body 1 of the drawing ruler, and is connected with the drawing ruler. The ruler main body 1 is slidably connected, the protractor limit block 17 is located on the left side of the front surface of the protractor slider 16, and is fixedly connected with the protractor slider 16, the protractor 18 penetrates the right side wall of the drawing ruler main body 1, and the protractor 18 is fixedly connected with the protractor slider 16 , the second edge guard stop block 19 is located on the upper right side of the front surface of the drawing ruler body 1 close to the protractor 18, the second edge guard stop block 19 is fixedly connected with the drawing ruler body 1, and the second edge guard insert block 20 is located on the drawing ruler Above the right side wall of the main body 1 , and fixedly connected with the drawing ruler main body 1 , the drawing ruler main body 1 penetrates the lower surface of the second edge guard 21 , and the second edge guard 21 is slidably connected with the drawing ruler main body 1 .

Further, the left side of the front surface of the drawing ruler main body 1 is provided with a fixed seat rotation groove, and the drawing disc fixing seat 3 penetrates the drawing ruler main body 1 through the fixed seat rotation groove, and is rotatably connected with the drawing ruler main body 1, which is convenient for subsequent rotation of the drawing disc. 4 and the main body of the drawing ruler 1, and perform the corresponding circle drawing operation.

Further, the auxiliary groove 5 for drawing a circle is in the shape of an arc, and the drawable radius is a circle of one centimeter. The front surface of the drawing disk 4 is also provided with an auxiliary sub-slot for drawing a circle, which is located on the left side of the front surface of the drawing disk 4 and is close to the drawing circle. The right side of the auxiliary slot 5 is arc-shaped, which can draw a circle with a diameter of one centimeter. You can first press the drawing disk holder 3 to rotate the drawing disk 4 and the drawing ruler body 1, and then insert the brush into the drawing circle. A circle of corresponding size is drawn in the circle drawing auxiliary groove 5 opened on the plate 4 for product design.

Further, the number of auxiliary circle-drawing holes 8 is four, all of which are located on the left side of the front surface of the drawing ruler main body 1 near the angle groove 6, and are opened at intervals of one centimeter from left to right, and a brush can be inserted into the auxiliary circle-drawing hole 8. Inside, press the drawing disc holder 3 by hand, and turn the drawing disc 4 and the drawing ruler body 1 to draw a circle of corresponding size for product design.

Further, the drawing auxiliary line 9 is composed of seven vertical lines and four horizontal lines, and the distance from each other is one centimeter. Yes, to ensure product drawing accuracy.

Further, the number of horizontal drawing grooves 10 is four, which in turn coincide with the left part of the first horizontal line, the left part of the second horizontal line, the left part of the third horizontal line and the left part of the fourth horizontal line of the drawing auxiliary line 9, and the horizontal The number of openings of the drawing sub-slots 11 is three, which are located on the right side between the first horizontal line and the second horizontal line of the drawing auxiliary line 9, the right side between the second horizontal line and the third horizontal line, and the third horizontal line respectively. and the right side between the fourth horizontal line, the vertical drawing slot 12 is opened on the fourth vertical line, the fifth vertical line and the third horizontal line of the drawing auxiliary line 9, and the number of vertical drawing sub-slots 13 is four, respectively. Below the drawing auxiliary line 9 between the third vertical line and the fourth vertical line, between the fourth vertical line and the fifth vertical line, and between the sixth vertical line and the seventh vertical line, By setting a relevant number of horizontal drawing slots 10 , horizontal drawing sub-slots 11 , vertical drawing slots 12 and vertical drawing sub-slots 13 , it is convenient to draw parallel lines or vertical lines of different sizes for product design.

Further, the number of protractor blocks 15 is two, which are located on the left side of the inner upper surface and the left side of the inner lower surface of the protractor chute 14, and are fixedly connected with the main body 1 of the drawing ruler. The protractor slider 16 and the protractor 18 are connected to the main body of the drawing ruler. 1. The protractor block 15 is engaged and fixed. By setting two protractor blocks 15, the protractor slider 16, the protractor 18 and the drawing ruler main body 1 are easily clamped and fixed, and the protractor 18 can be easily stored.

Further, the right side wall of the main body 1 of the drawing ruler is provided with a protractor receiving groove, and the protractor 18 penetrates the right side wall of the main body 1 of the drawing ruler through the receiving groove of the protractor, and is fixedly connected with the slider 16 of the protractor. There is a protractor storage slot, which is convenient for storing and protecting the protractor 18 when the protractor 18 is not in use.

Further, the inside of the first edge protector 2 is provided with a drawing ruler slot, and the drawing ruler main body 1 penetrates the first edge protector 2 through the drawing ruler slot, and is fixedly engaged with the first edge protector 2, and the second edge protector. A drawing ruler chute is provided inside the bar 21. The drawing ruler main body 1 penetrates the second edge guard 21 through the drawing ruler chute, and is slidably connected with the second edge guard 21. By setting the first edge guard 2 and the second guard. The edge strip 21 protects the edge of the drawing ruler, prevents bumping and damage from falling, and prolongs the service life of the drawing ruler. By opening the drawing ruler chute inside the second edge guard 21, it is convenient for the second edge guard 21 to connect with the drawing ruler. The sliding connection between the main bodies 1 can be connected to each other, extending the length of the straight line drawn by the drawing ruler and meeting the needs of product design.

To sum up, the work flow of the present invention: when using the drawing ruler for product design, the drawing disk 4 and the drawing ruler main body 1 can be rotated by pressing the drawing disk holder 3 by hand, and the brush is inserted into the drawing disk 4. Draw a circle in the auxiliary groove 5 for drawing circles, or insert a brush into the auxiliary hole for drawing circles 8, press the holder 3 of the drawing disk by hand, and turn the drawing disk 4 and the main body 1 of the drawing ruler to draw a circle of the corresponding size. The angle slot 6 set on the main body 1 of the drawing ruler is used to draw the angle of the corresponding angle, or the angle drawn by the angle slot 7 is used to divide the angle drawn by the angle slot 6 into two equal parts. Drawing auxiliary line 9, using the horizontal drawing slot 10, the horizontal drawing sub-slot 11, the vertical drawing slot 12 and the vertical drawing sub-slot 13, which are opened inside, draw parallel or vertical lines of relevant dimensions for product design. A protractor chute 14 is provided on the right side of the front surface of the main body 1 of the drawing ruler, and the protractor 18 is slid out for relative angle measurement. When the protractor 18 is not used, the protractor 18 can also be pushed back for storage protection. The strip 21 can protect the edge of the drawing ruler to prevent bumping damage from falling. Connect with each other to extend the length of the straight line drawn by the drawing ruler, thereby enhancing the practicability of the drawing ruler and meeting the different needs of product design and drawing.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (9)

1. The utility model provides a product design chi for drawing that practicality is strong, including drawing chi main part (1), first strake (2), draw disc fixing base (3), draw disc (4), draw circle auxiliary tank (5), angle groove (6), angle grooving (7), draw circle auxiliary hole (8), drawing auxiliary line (9), horizontal drawing groove (10), horizontal drawing grooving (11), perpendicular drawing groove (12), perpendicular drawing grooving (13), protractor spout (14), protractor fixture block (15), protractor slider (16), protractor stopper (17), protractor (18), second strake stopper (19), second strake inserted block (20) and second strake (21), its characterized in that: the drawing rule main body (1) runs through the upper surface of the first edge protection strip (2) and is fixedly clamped with the first edge protection strip (2), the drawing disc fixing seat (3) runs through the left end of the drawing rule main body (1) and is rotatably connected with the drawing rule main body (1), the drawing disc fixing seat (3) runs through the drawing disc (4), the drawing disc (4) is positioned on the left side of the front surface of the drawing rule main body (1) and is fixedly connected with the drawing rule main body (1), the circle drawing auxiliary groove (5) is formed on the left side of the front surface of the drawing disc (4), the angle groove (6) is formed above the left side of the front surface of the drawing rule main body (1) and is close to the right side of the drawing disc (4), the angle groove (7) is formed on the inner side of the angle groove (6), the drawing circle auxiliary hole (8) is arranged on the left side of the front surface of the drawing ruler main body (1) close to the lower part of the angle groove (6), the drawing auxiliary line (9) is arranged on the front surface of the drawing ruler main body (1), the horizontal drawing groove (10) is arranged on the front surface of the drawing ruler main body (1), the horizontal drawing sub-groove (11) is arranged on the upper part of the right side of the front surface of the drawing ruler main body (1), the vertical drawing groove (12) is arranged on the front surface of the drawing ruler main body (1), the vertical drawing sub-groove (13) is arranged on the lower part of the front surface of the drawing ruler main body (1), the protractor sliding groove (14) is arranged on the right side of the front surface of the drawing ruler main body (1) close to the right side of the angle groove (9), and the protractor clamping block (15) is arranged on the left side of, the protractor sliding groove (14) is fixedly connected with the drawing rule main body (1), the protractor sliding block (16) is positioned on the right side inside the drawing rule main body (1) and is slidably connected with the drawing rule main body (1), the protractor limiting block (17) is positioned on the left side of the front surface of the protractor sliding block (16) and is fixedly connected with the protractor sliding block (16), the protractor (18) penetrates through the right side wall of the drawing rule main body (1), the protractor (18) is fixedly connected with the protractor sliding block (16), the second edge protection limiting block (19) is positioned above the right side of the front surface of the drawing rule main body (1) and is close to the upper part of the protractor (18), the second edge protection limiting block (19) is fixedly connected with the drawing rule main body (1), and the second edge protection inserting block (20) is positioned above the right side wall of the drawing rule main body (1), and with drawing rule main part (1) fixed connection, drawing rule main part (1) runs through second strake (21) lower surface, second strake (21) with drawing rule main part (1) sliding connection.

2. A strong product design drawing rule as claimed in claim 1, characterized in that: the fixing base swivelling chute has been seted up on the left of drawing rule main part (1) front surface, draw disc fixing base (3) and pass through the fixing base swivelling chute runs through drawing rule main part (1), and with drawing rule main part (1) rotates and is connected.

3. A strong product design drawing rule as claimed in claim 1, characterized in that: the circle drawing auxiliary groove (5) is arc-shaped and can draw a circle with the radius of one centimeter, the circle drawing auxiliary sub-groove is further formed in the front surface of the drawing disc (4), the circle drawing auxiliary sub-groove is located on the left side of the front surface of the drawing disc (4) and close to the right side of the circle drawing auxiliary groove (5), the circle drawing auxiliary groove is arc-shaped and can draw a circle with the diameter of one centimeter.

4. A strong product design drawing rule as claimed in claim 1, characterized in that: the number of the circle drawing auxiliary holes (8) is four, the four circle drawing auxiliary holes are all located on the left side of the front surface of the drawing rule main body (1) and close to the lower portion of the angle groove (6), and the four circle drawing auxiliary holes are sequentially formed from left to right at intervals of one centimeter.

5. A strong product design drawing rule as claimed in claim 1, characterized in that: the drawing auxiliary line (9) is composed of seven vertical lines and four horizontal lines, and the distance between the seven vertical lines and the four horizontal lines is one centimeter.

6. A strong product design drawing rule as claimed in claim 1, characterized in that: the number of the horizontal drawing grooves (10) is four, the horizontal drawing grooves are sequentially overlapped with the left part of a first horizontal line, the left part of a second horizontal line, the left part of a third horizontal line and the left part of a fourth horizontal line of the drawing auxiliary line (9), the number of the horizontal drawing grooves (11) is three, the horizontal drawing grooves are respectively positioned on the right side between the first horizontal line and the second horizontal line, the right side between the second horizontal line and the third horizontal line and the right side between the third horizontal line and the fourth horizontal line of the drawing auxiliary line (9), the vertical drawing grooves (12) are respectively positioned on the fourth vertical line, the fifth vertical line and the third horizontal line of the drawing auxiliary line (9), the number of the vertical drawing grooves (13) is four, and the vertical drawing grooves are respectively positioned below the third vertical line and the fourth vertical line of the drawing auxiliary line (9), Below between the fourth vertical line and the fifth vertical line and below between the sixth vertical line and the seventh vertical line.

7. A strong product design drawing rule as claimed in claim 1, characterized in that: the quantity of protractor fixture block (15) is two, is located protractor spout (14) inside upper surface left side and inside lower surface left side, all with drawing rule main part (1) fixed connection, protractor slider (16) with protractor (18) with drawing rule main part (1) passes through protractor fixture block (15) block is fixed.

8. A strong product design drawing rule as claimed in claim 1, characterized in that: the drawing rule main part (1) right side wall has seted up the protractor and has accomodate the groove, protractor (18) pass through the protractor accomodates the groove run through drawing rule main part (1) right side wall, and with protractor slider (16) fixed connection.

9. A strong product design drawing rule as claimed in claim 1, characterized in that: first strake (2) inside has seted up the drawing rule draw-in groove, drawing rule main part (1) passes through the drawing rule draw-in groove runs through first strake (2), and with first strake (2) block is fixed, the inside drawing rule spout of having seted up of second strake (21), drawing rule main part (1) passes through the drawing rule spout runs through second strake (21), and with second strake (21) sliding connection.

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