Parallel auxiliary drawing board

Abstract

This invention proposes a parallel auxiliary drawing board, comprising a rectangular drawing board with connecting slide rails on all four sides and a ruler whose two ends slide within the slide rails. The ruler is the same length as the long side of the rectangular drawing board. One end of the ruler slides within the slide rail via a first connecting member; the other end of the ruler slides within the slide rail via a second connecting member. Simultaneously, the bottom surface of the ruler has a groove for the second connecting member to slide within. This invention solves the problems of cumbersome and inaccurate operations in drawing horizontal and vertical parallel lines during the drafting process. The ruler's direction can change as it slides on the slide rails, from horizontal to vertical and from vertical to horizontal, reducing the cumbersome operations of changing the ruler's direction and requiring other rulers for drafting assistance, thus improving work efficiency. The track also serves to fix the ruler, ensuring drafting accuracy.

Description

Technical Field

[0001] This invention relates to a drawing board, and more particularly to an auxiliary drawing board. Background Technology

[0002] A drawing board is a mat used to support paper for drawing. A drafting board is a fiberboard used for drawing. It is a square panel used as a base for drawing paper. A typical drafting board is a rectangular piece of cork, about 3 / 4 inch thick, with a perfectly flat, smooth surface. To maintain ideal parallelism and smooth edges, and to prevent warping, each short side of the drafting board is reinforced with a tenoned piece of wood, or with metal corner reinforcements along the long sides. A ruler can be placed on the panel and moved to draw. A T-square is placed against the side of the panel and moved to draw parallel lines. For outdoor sketching and watercolor painting, artists often use portable drawing boards made of materials like siding and corrugated cardboard. In the studio, a drafting table can support a drawing board or serve as a substitute.

[0003] A common drafting board is a hollow wooden board, often used in conjunction with a T-square during drafting. The process involves repeatedly picking up, putting down, and aligning the T-square, which is tedious. Furthermore, the T-square requires manual adjustment to ensure it fits snugly against the drafting board, making it easy for uneven force to cause alignment errors, resulting in inaccurate lines and affecting drafting accuracy. Summary of the Invention

[0004] Purpose of the invention: To provide a parallel auxiliary drawing board to assist in drawing parallel lines in engineering drawings, thereby improving work efficiency and drawing accuracy.

[0005] Technical solution: A parallel auxiliary drawing board includes a rectangular drawing board with connecting slide rails on all four sides and a ruler with both ends sliding in the slide rails, wherein the ruler is the same length as the long side of the rectangular drawing board.

[0006] One end of the ruler slides in the slide rail via a first connecting member; the other end of the ruler slides in the slide rail via a second connecting member, and the bottom surface of the ruler has a groove for the second connecting member to slide in.

[0007] Furthermore, the first connecting component includes a connecting block, a first bearing fixed to the upper surface of the connecting block, and second bearings respectively fixed to both ends of the lower surface of the connecting block; the first bearing is embedded in the bottom surface of one end of the ruler, and the two second bearings slide in the slide rail of the rectangular drawing board.

[0008] Furthermore, the second connecting member includes a third bearing and a fourth bearing coaxially connected, wherein the third bearing slides in the groove of the ruler, and the fourth bearing slides in the slide rail of the rectangular drawing board.

[0009] Furthermore, the third and fourth bearings are coaxially connected via an optical axis, creating a gap between the bottom surface of the ruler and the surface of the drawing board.

[0010] Furthermore, the second connecting member is provided in two parts, which slide in the two grooves of the ruler respectively.

[0011] Furthermore, the groove is formed along the length of the lower surface of the ruler, and the cross-section of the groove is T-shaped.

[0012] Furthermore, the groove is provided with buckles at both ends to fix the third bearing. The buckles are smooth protrusions on both sides of the groove that fix the third bearing in the space at the end of the groove.

[0013] Furthermore, the ruler is provided with a small ruler that can slide along the length of the ruler, and both ends of the small ruler have a 0 mark.

[0014] Furthermore, the slide rail of the rectangular drawing board is a rounded rectangle, the cross-section of the slide rail is a U-shaped groove, and the two ends of the bottom edge of the slide rail are raised to support the sliding of the first connecting member and the second connecting member.

[0015] As can be seen from the above-described solutions of the present invention, the significant advantages of the present invention are:

[0016] This invention solves the problem of cumbersome and inaccurate operation of drawing horizontal and vertical parallel lines in the drafting process. The ruler can change direction by sliding on the slide rail, from horizontal to vertical and from vertical to horizontal, which reduces the cumbersome operation of changing the ruler's direction and the need for other rulers to assist in drafting, thus improving work efficiency. The track also serves to fix the ruler, ensuring drafting accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the cross-section of the drawing board's slide rail;

[0019] Figure 3 Here is a structural diagram of a ruler and a small ruler;

[0020] Figure 4 This is a cross-sectional diagram of a ruler and a small ruler;

[0021] Figure 5 This is a top view of a ruler;

[0022] Figure 6 (a)(b)(c) are Figure 5 Cross-sectional views of each section of the straightedge;

[0023] Figure 7 This is a structural schematic diagram of the first connecting member;

[0024] Figure 8 This is a structural schematic diagram of the second connecting member;

[0025] Figure 9 This is a schematic diagram of the buckle structure;

[0026] Figure 10 Structural diagram designed to prevent ink smudging;

[0027] Figure 11 This is a schematic diagram of the sliding of the first connecting component;

[0028] Figure 12 This is a schematic diagram of the sliding of the second connecting member;

[0029] Figure 13 This is a diagram showing the movement trajectory of the ruler. Detailed Implementation

[0030] A parallel auxiliary drawing board, such as Figure 1 As shown, the drawing area includes a wooden drawing board 1, a plastic ruler 3, and a small ruler 4. The wooden drawing board has markings 6 around its perimeter for easy measurement during drafting. The board is 640mm long and 466mm wide, slightly larger than a standard A2 drawing paper, to accommodate the sliding rail 2 and the printed markings 6. A2 drawing paper positioning points 5 are located at the four corners of the drawing area 7 to ensure the paper is horizontally and vertically aligned.

[0031] The four sides of drawing board 1 have interconnected and smoothly transitioning aluminum alloy slide rails 2, which are rounded rectangular in shape. For example... Figure 2 As shown, the slide rail 2 has a U-shaped cross-section, with protrusions on both sides of its bottom surface. These protrusions support the connecting components that slide within the slide rail, thereby reducing the contact area of ​​the bearings in the slide rail 2, which in turn reduces the sliding friction and makes the sliding of the connecting components smoother.

[0032] The ruler 3 has a trapezoidal cross-section, and both sides of the ruler 3 have graduation markings. The ruler 3 also has a small ruler 4 that can slide along its length, such as... Figure 3 , 4 As shown, the protrusion at the bottom of the small ruler 4 slides into the T-shaped groove 23 on the ruler 3. The small ruler 4 is 297mm long and has 0 graduations at both ends so that the 0 graduation can be read at any position when drawing.

[0033] like Figures 5-8 As shown, the ruler 3 is the same length as the long side of the rectangular drawing board 1, and both ends of the ruler 3 slide in the slide rail 2 of the drawing board 1. Specifically, the left end of the ruler 3 slides in the slide rail 2 of the rectangular drawing board 1 through the first connecting member 8, and the right end slides in the slide rail 2 of the rectangular drawing board 1 through the second connecting member 9. At the same time, the bottom surface of the ruler 3 has grooves 24 and 25 for the second connecting member 9 to slide in.

[0034] The first connecting component 8 includes a connecting block 10, a first bearing 16 fixed to the upper surface of the connecting block 10 via a first optical axis 15, and two second bearings 11 and 12 of the same size fixed to both ends of the lower surface of the connecting block 10 via second optical axes 13 and 14, respectively. The first bearing 16 is embedded in the cylindrical groove 26 at the left end of the ruler 3, and the two second bearings 11 and 12 slide in the slide rail 2 of the rectangular drawing board 1. The reason for setting two second bearings 11 and 12 is that the gap between the two bearings and the single bearing is smaller, and the amplitude of the wobbling is smaller, so that the parallel movement of the ruler 3 is more stable during drawing, and the drawing accuracy is higher.

[0035] The second connecting member 9 is provided in two sets. Each set includes a third bearing 19, 20 and a fourth bearing 17, 18 coaxially connected by a third optical axis 21, 22. The third bearings 19, 20 slide in the grooves 24, 25 of the ruler 3, and the fourth bearings 17, 18 slide in the slide rail 2 of the rectangular drawing board 1. Correspondingly, the ruler 3 has two grooves 24, 25 along its length on its lower surface, for the third bearings 19, 20 of the two sets of the second connecting member 9 to be inserted. The grooves 24, 25 have a T-shaped cross-section and a length of 178 mm. Buckles are provided at both ends of the grooves to fix the third bearings 19, 20. The buckles are smooth protrusions 27 on both sides of the groove, so that when the third bearings 19, 20 slide to the bottom of the groove end, they can be fixed in the space on the side of the smooth protrusion 27 near the end. Figure 9 As shown. The third optical axes 21 and 22 support the ruler 3, creating a 1mm gap between the bottom surface of the ruler 3 and the surface of the drawing board 1. This prevents ink stuck to the ruler 3 from contacting the paper during drawing, thus avoiding ink smudging and staining the paper. Figure 10 As shown.

[0036] like Figures 11-13 As shown, when the ruler 3 slides from the horizontal direction to the opposite vertical direction (or from the vertical direction to the opposite horizontal direction), the first bearing 16 is fixed in the cylindrical groove 26 at the left end of the ruler 3. The first optical axis 15 connected to the first bearing 16 rotates, making the ruler 3 at an angle to the slide rail 2, but the second bearings 11 and 12 located on the slide rail 2 can still move along the slide rail 2. The two third bearings 19 and 20 slide along the wall in the two grooves 24 and 25 of the ruler 3, thereby adjusting the length of the ruler 3 within the range of the drawing board 1. The third optical axes 21 and 22 rotate, making the ruler 3 at an angle to the slide rail 2, but the fourth bearings 17 and 18 located on the slide rail 2 can still move along the slide rail 2.

[0037] The usage method of the above parallel auxiliary drawing board is as follows:

[0038] When drawing horizontal parallel lines, the two ends of the ruler 3 slide to the long side of the rectangular drawing board 1 respectively, and the third bearings 19 and 20 are fixed at the right end of the grooves 24 and 25. At this time, the second connecting component 9 slides on the short side track 2 of the drawing board 1, and the ruler 3 moves parallel along the short side of the drawing board 1.

[0039] When drawing vertical parallel lines, one end of the ruler 3 slides to the short side of the rectangular drawing board 1, and the other end extends out of the drawing board 1. The third bearings 19 and 20 are fixed at the left end of the grooves 24 and 25. At this time, the second connecting member 9 slides on the long side track 2 of the drawing board 1, and the ruler 3 moves parallel along the long side of the drawing board 1.

[0040] When drawing a diagonal line, one end of the ruler 3 slides to the long side of the rectangular drawing board 1 and the other end slides to the short side of the rectangular drawing board 1. When the ruler 3 is converted between horizontal and vertical on the drawing board 1, the third bearings 19 and 20 slide in the grooves 24 and 25.

[0041] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A parallel auxiliary drawing board, characterized in that, It includes a rectangular drawing board with connecting slide rails on all four sides and a ruler with both ends sliding in the slide rails, wherein the ruler is the same length as the long side of the rectangular drawing board. One end of the ruler slides in a slide rail via a first connecting member; the other end of the ruler slides in a slide rail via a second connecting member. Simultaneously, the bottom surface of the ruler has a groove for the second connecting member to slide within. The first connecting member includes a connecting block, a first bearing fixed to the upper surface of the connecting block, and second bearings fixed to both ends of the lower surface of the connecting block. The first bearing is embedded in the bottom surface of one end of the ruler, and the two second bearings slide in the slide rail of the rectangular drawing board. The second connecting member includes a third bearing and a fourth bearing coaxially connected. The third bearing slides in the groove of the ruler, and the fourth bearing slides in the slide rail of the rectangular drawing board. The third and fourth bearings are coaxially connected via an optical axis, creating a gap between the bottom surface of the ruler and the surface of the drawing board. Two second connecting members are provided, each corresponding to one of the two grooves on the ruler. The grooves are formed along the length of the lower surface of the ruler, and their cross-section is T-shaped. The slide rail of the rectangular drawing board is a rounded rectangle with a U-shaped groove cross-section. The bottom edges of the slide rail protrude at both ends to support the sliding of the first and second connecting members.

2. The parallel auxiliary drawing board according to claim 1, characterized in that, The groove is provided with buckles at both ends to fix the third bearing. The buckles are smooth protrusions on both sides of the groove that fix the third bearing in the space at the end of the groove.

3. The parallel auxiliary drawing board according to claim 1, wherein, The ruler is equipped with a small ruler that can slide along the length of the ruler, and both ends of the small ruler have a 0 mark.

Images