CN108437686B

CN108437686B - Art sketching view-finding proportional perspective corrector

Info

Publication number: CN108437686B
Application number: CN201810329106.4A
Authority: CN
Inventors: 李晶
Original assignee: Heilongjiang Institute of Technology
Current assignee: Heilongjiang Institute of Technology
Priority date: 2018-04-13
Filing date: 2018-04-13
Publication date: 2020-01-10
Anticipated expiration: 2038-04-13
Also published as: CN108437686A

Abstract

The invention provides an art sketching view-finding proportional perspective corrector, which selects an image of a distant scene by a view-finding frame, displays the image on a view-finding plate, and a painter decomposes the scene displayed on the view-finding plate according to a grid reference line formed by a first reference line and a second reference line, thereby being beneficial to the observation of the scene, being capable of adjusting the view-finding range, accurately finding and positioning the sketching range, accurately mastering the size and the proportion while sketching, realizing the rapid improvement of sketching skills, and effectively solving the long-term problems of difficult view finding, difficult shape discrimination, difficult draft repair, difficult analytic proportional perspective relation and the like. In addition, the device provided by the invention has the advantages of reasonable design, simple structure, convenience in use and the like, helps students to master scene relations and proportions in an all-around manner, meets the understanding of painters on the relation and proportions of distant and close scenes, and helps the painters to accurately position the sketching borders and proportions.

Description

Art sketching view-finding proportional perspective corrector

Technical Field

The invention belongs to the field of intelligent buildings, and particularly relates to an art sketching view-finding proportional perspective corrector.

Background

Sketching is a drawing method for directly drawing an object, and basically includes various classifications such as "landscape sketching", "still sketching", and "portrait sketching" depending on the drawing object. Art sketching needs to be completed on a special sketching support, and a painter represents a real object seen by eyes on the drawing paper by means of a view-finding frame. However, because the position of the painter is different from the painting object in angle, distance and height, different and even subtle scale and perspective changes occur, so that many painters have difficulty in accurately grasping and identifying the painter. In addition, in the middle of drawing teaching, when the teacher taught the drawing skill to the student, the student relied on traditional painting from life device to be difficult to through observing the three-dimensional real object in space, accurately judge proportion, perspective relation and form correct plane image in the mind, can not comprehend the drawing skill completely to can't reach good drawing effect and teaching effect, lead to learning efficiency poor, promote speed slowly.

Disclosure of Invention

The invention provides an art sketching view-finding proportional perspective corrector which is beneficial to observing scenery, helps a painter to master the relation and proportion of the scenery in all directions and meets the understanding of the painter on the relation and proportion of the distant scenery.

The technical scheme of the invention is realized as follows:

an artistic sketching view-finding proportional perspective corrector, comprising:

a support;

the support is provided with a support plate, and a drawing board and a view-finding frame are arranged on the support plate; the view-finding frame is arranged on one side of the drawing board;

the view frame comprises a frame body and a view plate, the view plate is arranged behind the frame body, and the view plate is a transparent view plate; the frame body is formed by an upper frame, a lower frame, a left frame and a right frame in a surrounding mode; the front surfaces of the upper frame, the lower frame, the right frame and the left frame are all provided with T-shaped grooves, and 4T-shaped grooves are communicated with one another; the T-shaped groove is connected with the reference ruler through a T-shaped joint;

the upper frame and the lower frame are respectively marked with a first size from the left frame to the right frame; the left frame and the right frame are calibrated with a second size from the upper frame to the lower frame; the intersection of the upper frame and the left frame and the intersection of the lower frame and the right frame are provided with zero values of the first size; the intersection of the left frame and the upper frame and the intersection of the right frame and the upper frame are both provided with zero values of the second size;

a plurality of first grooves are uniformly formed in the upper frame according to the first size, a first connecting shaft is fixed in each first groove, a first winding wheel is arranged on each first connecting shaft, and a first reference line is wound on each first winding wheel; one end of the first reference line is fixed on the first coiling wheel, and the other end of the first reference line is provided with a first connecting ring; a second groove corresponding to the first groove is formed in the lower frame, and a first connecting rod is arranged in the second groove; the first groove is arranged below the T-shaped groove on the upper frame, and the second groove is arranged above the T-shaped groove on the lower frame;

a plurality of third grooves are uniformly formed in the left frame according to a second size, a second connecting shaft is fixed in each third groove, a second winding wheel is arranged on each second connecting shaft, and a second reference line is wound on each second winding wheel; one end of the second reference line is fixed on the second winding wheel, and the other end of the second reference line is provided with a second connecting ring; a fourth groove corresponding to the third groove is formed in the lower frame, and a second connecting rod is arranged in the fourth groove; the third groove is formed in the right side of the T-shaped groove in the left frame, and the fourth groove is formed in the left side of the T-shaped groove in the right frame;

the reference ruler comprises a first protractor fixed at the top of the T-shaped joint, a main ruler is fixed at the top of the first protractor through a first rotating shaft, a second protractor is arranged at one end, far away from the first protractor, of the main ruler, and the second protractor is connected with an auxiliary ruler through a second rotating shaft; the bottom side of the first protractor is parallel to the length direction of the first dimension; the first rotating shaft is arranged at the circle center of the first protractor, and the second rotating shaft is arranged at the circle center of the second protractor.

Preferably, the support plate is provided with a first rotating platform and a second rotating platform, the first rotating platform is provided with a first height adjusting mechanism, and the second rotating platform is provided with a second height adjusting mechanism; the first height adjusting mechanism is connected with the central part of the drawing board through a first rotating mechanism; and the second height adjusting mechanism is connected with the lower frame through a second rotating mechanism.

Preferably, first height adjusting mechanism with second height adjusting mechanism's structure is the same, first height adjusting mechanism includes the fall way, be provided with the external screw thread on the outer wall of fall way, the one end of fall way is provided with first stay tube, and the other end is provided with the second stay tube, first stay tube with all be provided with on the inner wall of second stay tube with external screw thread screw-thread fit's internal thread, first stay tube is fixed on first rotary platform.

Preferably, the first rotating mechanism and the second rotating mechanism are identical in structure;

the first rotating mechanism comprises a fixed seat fixed at the top of the second supporting tube, a damping shaft is arranged in the fixed seat in a rotating mode, and the damping shaft is fixedly connected with the drawing board.

Preferably, a first blocking block is arranged at the bottom of the first connecting rod far away from the lower frame, and a second blocking block is arranged on the right side of the second connecting rod far away from the left frame.

Preferably, a first slide rail is arranged at the bottom of the first connecting rod along the length direction, a first slide block is arranged on the first slide rail, and the first slide block is connected with the first stop block;

the right side of the second connecting rod is provided with a second sliding rail along the length direction, a second sliding block is arranged on the second sliding rail, and the second sliding block is connected with the second blocking block.

Preferably, the first connecting rod and the second connecting rod are both provided with threads.

Preferably, the length ratio of the upper border to the left border is the same as the aspect ratio of the drawing board.

Preferably, a first indicating line is arranged on the main scale, is parallel to the scale mark on the main scale, and passes through the center of the first protractor; and a second indicating line is arranged on the auxiliary ruler, is parallel to the scale marks on the auxiliary ruler and passes through the circle center of the second protractor.

The invention provides an art sketching view-finding proportional perspective corrector, which selects an image of a distant scene by a view-finding frame, displays the image on a view-finding plate, and a painter decomposes the scene displayed on the view-finding plate according to a grid reference line formed by a first reference line and a second reference line, thereby being beneficial to the observation of the scene, being capable of adjusting the view-finding range, accurately finding and positioning the sketching range, accurately mastering the size and the proportion while sketching, realizing the rapid improvement of sketching skills, and effectively solving the long-term problems of difficult view finding, difficult shape discrimination, difficult draft repair, difficult analytic proportional perspective relation and the like. In addition, the device provided by the invention has the advantages of reasonable design, simple structure, convenience in use and the like, helps a painter to master scene relations and proportions in an all-around manner, meets the understanding of the painter on the relation and proportion of distant and close scenes, and helps the painter to accurately position the sketching frame and proportion.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of an art sketching view-finding proportional perspective corrector according to the present invention;

FIG. 2 is a schematic view of the view finder of FIG. 1;

fig. 3 is a schematic structural view of the reference ruler in fig. 1.

In the figure:

1. a support; 2. a support plate; 3. a drawing board; 4. a viewing frame; 5. an upper frame; 6. a lower frame; 7. a left frame; 8. a right frame; 9. a viewfinder plate; 10. a T-shaped groove; 11. a first dimension; 12. a second size; 13. a first groove; 14. a first reference line; 15. a third groove; 16. a second reference line; 17. a first reel; 18. a second winding wheel; 19. a first connecting rod; 20. a second connecting rod; 21. a first protractor; 22. a main scale; 23. a second protractor; 24. a secondary ruler; 25. a first rotating platform; 26. a second rotary platform; 27. a first support tube; 28. a second support tube; 29. a lifting pipe; 30. a first stopper; 31. a second stopper; 32. a first indicator line; 33. a second indicator line.

Detailed Description

With reference to fig. 1 to 3, the invention provides an art sketching view-finding proportional perspective corrector, comprising:

a bracket 1;

a support plate 2 is arranged on the support 1, and a drawing board 3 and a view-finding frame 4 are arranged on the support plate 2; the view-finding frame 4 is arranged on one side of the drawing board 3;

the view frame 4 comprises a frame body and a view plate 9, the view plate 9 is arranged behind the frame body, and the view plate 9 is a transparent view plate; the frame body is enclosed by an upper frame 5, a lower frame 6, a left frame 7 and a right frame 8; the front sides of the upper frame 5, the lower frame 6, the right frame 8 and the left frame 7 are all provided with T-shaped grooves 10, and 4T-shaped grooves 10 are communicated with each other; the T-shaped groove 10 is connected with a reference ruler through a T-shaped joint;

the upper frame 5 and the lower frame 6 are marked with a first size 11 from the left frame 7 to the right frame 8; the left frame 7 and the right frame 8 are marked with a second size 12 from the upper frame 5 to the lower frame 6; zero values of a first size 11 are arranged at the intersection of the upper frame 5 and the left frame 7 and the intersection of the lower frame 6 and the right frame 8; zero values of a second size 12 are arranged at the intersection of the left frame 7 and the upper frame 5 and the intersection of the right frame 8 and the upper frame 5;

a plurality of first grooves 13 are uniformly formed in the upper frame 5 according to a first size 11, a first connecting shaft is fixed in each first groove 13, a first winding wheel 17 is arranged on each first connecting shaft, and a first reference line 14 is wound on each first winding wheel 17; one end of the first reference line 14 is fixed on the first coiling wheel 17, and the other end is provided with a first connecting ring; a second groove corresponding to the first groove 13 is arranged on the lower frame 6, and a first connecting rod 19 is arranged in the second groove; the first groove 13 is arranged below the T-shaped groove 10 on the upper frame 5, and the second groove is arranged above the T-shaped groove 10 on the lower frame 6;

a plurality of third grooves 15 are uniformly formed in the left frame 7 according to a second size 12, a second connecting shaft is fixed in each third groove 15, a second winding wheel 18 is arranged on each second connecting shaft, and a second reference line 16 is wound on each second winding wheel 18; one end of the second reference line 16 is fixed on the second winding wheel 18, and the other end is provided with a second connecting ring; a fourth groove corresponding to the third groove 15 is formed in the lower frame 6, and a second connecting rod 20 is arranged in the fourth groove; the third groove 15 is arranged on the right side of the T-shaped groove 10 on the left frame 7, and the fourth groove is arranged on the left side of the T-shaped groove 10 on the right frame 8;

the reference ruler comprises a first protractor 21 fixed at the top of the T-shaped joint, a main ruler 22 is fixed at the top of the first protractor 21 through a first rotating shaft, a second protractor 23 is arranged at one end, far away from the main ruler 22, of the first protractor 21, and the second protractor 23 is connected with an auxiliary ruler 24 through a second rotating shaft; the base of the first protractor is parallel to the length direction of the first dimension 11; the first rotating shaft is arranged at the center of the first protractor 21, and the second rotating shaft is arranged at the center of the second protractor 23.

Among the above-mentioned technical scheme, select the image of distant view thing with frame 4, then present on the panel 9 that finds a view, the drawing person is according to the grid reference line that first reference line 14 and second reference line 16 enclose, the view that presents on the panel that finds a view decomposes, do benefit to the observation to the view, and adjustable framing scope, accurate finding and the scope of location sketching, when sketching, can accurately hold size and proportion, realize that the rapider of sketching technique improves, solve effectively that it is difficult to find a view, distinguish the shape difficult, revise the manuscript difficult problem that the proportion perspective relation is difficult to exist for a long time, etc.. In addition, the device provided by the invention has the advantages of reasonable design, simple structure, convenience in use and the like, helps students to master scene relations and proportions in an all-around manner, meets the understanding of painters on the relation and proportions of distant and close scenes, and helps the painters to accurately position the sketching borders and proportions.

In the invention, a support plate 2 is arranged on a bracket 1, and a drawing board 3 and a view-finding frame 4 are arranged on the support plate 2; the view-finding frame 4 is arranged on one side of the drawing board 3; through set up drawing board 3 and frame 4 of finding a view simultaneously in backup pad 2 to be convenient for the drawing person find a view, the drawing creation.

The viewfinder frame 4 comprises a frame body and a viewfinder plate 9, and the viewfinder plate 9 is arranged behind the frame body; the frame body is enclosed by an upper frame 5, a lower frame 6, a left frame 7 and a right frame 8; the front sides of the upper frame 5, the lower frame 6, the right frame 8 and the left frame 7 are all provided with T-shaped grooves 10, and 4T-shaped grooves 10 are communicated with each other; the T-shaped groove 10 is connected with a reference ruler through a T-shaped joint. Above-mentioned setting can make things convenient for the drawing person to calculate whole composition line relative distance to accurately draw whole composition, help the drawing person pinpoint the frame and the proportion of painting from life.

The upper frame 5 and the lower frame 6 are marked with a first size 11 from the left frame 7 to the right frame 8; the left frame 7 and the right frame 8 are marked with a second size 12 from the upper frame 5 to the lower frame 6; zero values of a first size 11 are arranged at the intersection of the upper frame 5 and the left frame 7 and the intersection of the lower frame 6 and the right frame 8; zero values of a second size 12 are arranged at the intersection of the left frame 7 and the upper frame 5 and the intersection of the right frame 8 and the upper frame 5; through setting up the size on the frame for the drawing person can accurately hold size and proportion when painting from life, realizes the very fast improvement of the skill of painting from life, thereby makes things convenient for the drawing person to accurately draw the scenery that the frame of finder board 9 arrived, makes the drawing person progressively form and is converted to the drawing thinking mode on the plane picture by three-dimensional real object image.

A plurality of first grooves 13 are uniformly formed in the upper frame 5 according to a first size 11, a first connecting shaft is fixed in each first groove 13, a first winding wheel 17 is arranged on each first connecting shaft, and a first reference line 14 is wound on each first winding wheel 17; one end of the first reference line 14 is fixed on the first coiling wheel 17, and the other end is provided with a first connecting ring; a second groove corresponding to the first groove 13 is arranged on the lower frame 6, and a first connecting rod 19 is arranged in the second groove; the first groove 13 is arranged below the T-shaped groove 10 on the upper frame 5, and the second groove is arranged above the T-shaped groove 10 on the lower frame 6; a plurality of third grooves 15 are uniformly formed in the left frame 7 according to a second size 12, a second connecting shaft is fixed in each third groove 15, a second winding wheel 18 is arranged on each second connecting shaft, and a second reference line 16 is wound on each second winding wheel 18; one end of the second reference line 16 is fixed on the second winding wheel 18, and the other end is provided with a second connecting ring; a fourth groove corresponding to the third groove 15 is formed in the lower frame 6, and a second connecting rod 20 is arranged in the fourth groove; the third groove 15 is arranged on the left frame 7 on the right side of the T-shaped groove 10, and the fourth groove is arranged on the right frame 8 on the left side of the T-shaped groove 10. In the above arrangement, by connecting the first connecting ring on the first reference line 14 to the first connecting rod 19, the second connecting ring on the second reference line 16 is connected to the second connecting rod 20, so as to obtain the grid reference line above the viewfinder plate 9; the grid reference line does not influence the size of the reference ruler and the frame thereof; first reel 17, second reel 18 can arrange according to the needs of the drawing person, and the scenery of the board 9 reaction is looked into in help the drawing person accurately observe, compare, rectify, draw, and the drawing person of being convenient for holds the size of finding a view, is favorable to the observation to the scenery.

The reference ruler comprises a first protractor 21 fixed at the top of the T-shaped joint, a main ruler 22 is fixed at the top of the first protractor 21 through a first rotating shaft, a second protractor 23 is arranged at one end, far away from the main ruler 22, of the first protractor 21, and the second protractor 23 is connected with an auxiliary ruler 24 through a second rotating shaft; the bottom side of the protractor is parallel to the length direction of the first dimension 11; the first rotating shaft is arranged at the center of the first protractor 21, and the second rotating shaft is arranged at the center of the second protractor 23. The first protractor 21, the second protractor 23, the main scale 22 and the auxiliary scale 24 can help the painter to measure the different angle relationships of the proportion, the vertical, the horizontal and the inclination of the scenery, so that the painter can draw the correct outline and the shape relationship of the scenery.

In the embodiment of the present invention, the supporting plate 2 is provided with a first rotating platform 25 and a second rotating platform 26, the first rotating platform 25 is provided with a first height adjusting mechanism, and the second rotating platform 26 is provided with a second height adjusting mechanism; the first height adjusting mechanism is connected with the central part of the drawing board 3 through the first rotating mechanism; the second height adjusting mechanism is connected with the lower frame 6 through a second rotating mechanism. In the above, the first rotary platform 25, the first height adjusting mechanism and the first rotating mechanism are arranged to adjust the drawing board 3, so that the creation personnel can conveniently write; the arrangement of the second rotary platform 26, the second height adjusting mechanism and the second rotating mechanism can adjust the view finding plate 9 in the vertical, left-right and front-back directions, so that a painter can conveniently find a view, a user can conveniently adjust parallax, and a properly found view composition can be obtained.

In the embodiment of the present invention, the first height adjusting mechanism and the second height adjusting mechanism have the same structure, the first height adjusting mechanism includes an elevator tube 29, an external thread is provided on an outer wall of the elevator tube 29, a first support tube 27 is provided at one end of the elevator tube 29, a second support tube 28 is provided at the other end of the elevator tube 29, internal threads that are in threaded fit with the external thread are provided on inner walls of the first support tube 27 and the second support tube 28, and the first support tube 27 is fixed on the first rotary platform 25. The setting can conveniently be adjusted drawing board 3 and the height of viewing frame 4, and the drawing person of being convenient for carries out fine arts creation.

The first rotating mechanism and the second rotating mechanism have the same structure; the first rotating mechanism comprises a fixed seat fixed at the top of the second supporting tube 28, a damping shaft is arranged in the fixed seat in a rotating mode, and the damping shaft drawing board 3 is fixedly connected with the fixed seat.

In the embodiment of the present invention, in order to prevent the first connection ring from being separated from the first connection rod 19 and the second connection ring from being separated from the second connection rod 20, the first stopper 30 is provided at the bottom of the first connection rod 19 away from the lower frame 6, and the second stopper 31 is provided at the right side of the second connection rod 20 away from the left frame 7.

In the embodiment of the invention, in order to make the plane where the grid reference line enclosed by the first reference line 14 and the second reference line 16 is located parallel to the view finding plate 9, so that a painter can conveniently and accurately draw an overall composition according to the scenery reflected by the view finding frame 4, and the painting ability and quality of the painter are improved, the bottom of the first connecting rod 19 is provided with a first sliding rail along the length direction, the first sliding rail is provided with a first sliding block, and the first sliding block is connected with the first blocking block 30; the right side of the second connecting rod 20 is provided with a second slide rail along the length direction, the second slide rail is provided with a second slide block, and the second slide block is connected with the second stop block 31.

In the embodiment of the present invention, the first connecting rod 19 and the second connecting rod 20 are both provided with threads. Above-mentioned setting can avoid the primary connecting ring to deviate from primary connecting rod 19 equally, and the secondary connecting ring deviates from secondary connecting rod 20 to be convenient for the drawing person to decompose the scenery that the frame 4 frame was got of finder frame, improve drawing person's drawing quality.

In the embodiment of the invention, in order to facilitate the painter to copy the picture according to the view on the view frame 4, the length ratio of the upper frame 5 to the left frame 7 is the same as the length-width ratio of the drawing board 3.

In the embodiment of the invention, in order to facilitate a painter to accurately observe, compare and correct a certain scenery on the viewing plate 9, the main scale 22 is provided with a first indicating line 32, and the first indicating line 32 is parallel to the scale mark on the main scale 22 and passes through the center of the first protractor 21; the secondary scale 24 is provided with a second indication line 33, and the second indication line 33 is parallel to the scale mark on the secondary scale 24 and passes through the center of the second protractor 23.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a view-finding proportion perspective calibrator is drawn from life to fine arts which characterized in that includes:

a support (1);

a support plate (2) is arranged on the support (1), and a drawing board (3) and a view-finding frame (4) are arranged on the support plate (2); the view-finding frame (4) is arranged on one side of the drawing board (3);

the viewfinder frame (4) comprises a frame body and a viewfinder plate (9), the viewfinder plate (9) is arranged behind the frame body, and the viewfinder plate (9) is a transparent viewfinder plate; the frame body is enclosed by an upper frame (5), a lower frame (6), a left frame (7) and a right frame (8); the front faces of the upper frame (5), the lower frame (6), the right frame (8) and the left frame (7) are all provided with T-shaped grooves (10), and 4T-shaped grooves (10) are communicated with one another; the T-shaped groove (10) is connected with the reference ruler through a T-shaped joint;

a first size (11) is marked on the upper frame (5) and the lower frame (6) from the left frame (7) to the right frame (8); the left frame (7) and the right frame (8) are marked with a second size (12) from the upper frame (5) to the lower frame (6); the zero position value of the first size (11) is arranged at the intersection of the upper frame (5) and the left frame (7) and at the intersection of the lower frame (6) and the right frame (8); the intersection of the left frame (7) and the upper frame (5), and the intersection of the right frame (8) and the upper frame (5) are provided with zero values of the second size (12);

a plurality of first grooves (13) are uniformly formed in the upper frame (5) according to the first size (11), a first connecting shaft is fixed in each first groove (13), a first coiling wheel (17) is arranged on each first connecting shaft, and a first reference line (14) is wound on each first coiling wheel (17); one end of the first reference line (14) is fixed on the first coiling wheel (17), and the other end is provided with a first connecting ring; a second groove corresponding to the first groove (13) is formed in the lower frame (6), and a first connecting rod (19) is arranged in the second groove; the first groove (13) is arranged below the T-shaped groove (10) on the upper frame (5), and the second groove is arranged above the T-shaped groove (10) on the lower frame (6);

a plurality of third grooves (15) are uniformly formed in the left frame (7) according to a second size (12), a second connecting shaft is fixed in each third groove (15), a second winding wheel (18) is arranged on each second connecting shaft, and a second reference line (16) is wound on each second winding wheel (18); one end of the second reference line (16) is fixed on the second winding wheel (18), and the other end is provided with a second connecting ring; a fourth groove corresponding to the third groove (15) is formed in the lower frame (6), and a second connecting rod (20) is arranged in the fourth groove; the third groove (15) is formed in the left frame (7) on the right side of the T-shaped groove (10), and the fourth groove is formed in the right frame (8) on the left side of the T-shaped groove (10);

the reference ruler comprises a first protractor (21) fixed at the top of the T-shaped joint, a main ruler (22) is fixed at the top of the first protractor (21) through a first rotating shaft, a second protractor (23) is arranged at one end, far away from the first protractor (21), of the main ruler (22), and the second protractor (23) is connected with an auxiliary ruler (24) through a second rotating shaft; the base of the first protractor is parallel to the length direction of the first dimension (11); the first rotating shaft is arranged at the center of the first protractor (21), and the second rotating shaft is arranged at the center of the second protractor (23);

a first stop block (30) is arranged at the bottom of the first connecting rod (19) far away from the lower frame (6), and a second stop block (31) is arranged at the right side of the second connecting rod (20) far away from the left frame (7);

a first sliding rail is arranged at the bottom of the first connecting rod (19) along the length direction, a first sliding block is arranged on the first sliding rail, and the first sliding block is connected with the first stop block (30);

a second sliding rail is arranged on the right side of the second connecting rod (20) along the length direction, a second sliding block is arranged on the second sliding rail, and the second sliding block is connected with the second blocking block (31);

a first indicating line (32) is arranged on the main scale (22), and the first indicating line (32) is parallel to a scale mark on the main scale (22) and passes through the circle center of the first protractor (21); and a second indicating line (33) is arranged on the auxiliary ruler (24), and the second indicating line (33) is parallel to the scale mark on the auxiliary ruler (24) and passes through the circle center of the second protractor (23).

2. The art sketching view-finding proportional perspective corrector according to claim 1, wherein a first rotary platform (25) and a second rotary platform (26) are provided on the support plate (2), a first height adjusting mechanism is provided on the first rotary platform (25), and a second height adjusting mechanism is provided on the second rotary platform (26); the first height adjusting mechanism is connected with the central part of the drawing board (3) through a first rotating mechanism; the second height adjusting mechanism is connected with the lower frame (6) through a second rotating mechanism.

3. The art sketching viewfinder proportion perspective corrector according to claim 2, wherein the first height adjusting mechanism and the second height adjusting mechanism are identical in structure, the first height adjusting mechanism comprises an elevator pipe (29), an external thread is arranged on the outer wall of the elevator pipe (29), one end of the elevator pipe (29) is provided with a first supporting pipe (27), the other end of the elevator pipe is provided with a second supporting pipe (28), internal threads matched with the external thread are arranged on the inner walls of the first supporting pipe (27) and the second supporting pipe (28), and the first supporting pipe (27) is fixed on the first rotating platform (25).

4. The artistic sketching view-finding proportional perspective calibrator according to claim 3, wherein the first rotating mechanism and the second rotating mechanism have the same structure;

the first rotating mechanism comprises a fixed seat fixed to the top of the second supporting tube (28), a damping shaft is arranged in the fixed seat in a rotating mode, and the damping shaft is fixedly connected with the drawing board (3).

5. The art sketching view-finding proportional perspective corrector according to claim 1, wherein the first connecting rod (19) and the second connecting rod (20) are each provided with a thread.

6. The art sketching view-finding proportional perspective corrector according to claim 1, wherein the ratio of the length of the upper frame (5) to the length of the left frame (7) is the same as the aspect ratio of the drawing board (3).