Folding drawing board

Abstract

The utility model discloses a folding drawing board, and belongs to the technical field of drawing tools. The folding drawing board comprises a board face, a bottom frame, a support and an auxiliary frame, the front face of the board face is flat and used for placing drawing paper, the bottom of the back face of the board face is hinged to one side of the bottom frame, and the middle of the back face of the board face is hinged to one side of the support. The auxiliary frame is slidably connected with two sides of the board. When the folding drawing board is stored, the bottom frame and the support are folded towards the board face, the size of the drawing board is reduced, and the folding drawing board is convenient to carry; during use, the board surface and the underframe are unfolded at an included angle, the bottom of the support is clamped into a clamping groove matched with the support on the underframe, the inclination angle of the board surface can be adjusted, and drawing is facilitated; and a transverse auxiliary line can be drawn by using the auxiliary frame.

Description

Technical Field

[0001] This application relates to the technical field of painting tools, and particularly to a folding drawing board. Background Art

[0002] The foldable design of the folding drawing board makes the painting process more convenient, facilitating artists to create outdoors, during travel, or in limited spaces. At the same time, the adjustability of the folding drawing board meets the requirements of different projects, allowing users to freely adjust the tilt angle and height of the drawing board according to their preferences, which not only meets the diverse needs of modern drawing and design but also solves the challenges of limited working space, promoting the development of the art creation field.

[0003] Currently, there is an urgent need for a folding drawing board with a simple and lightweight structural design, especially maintaining a simple structure and a lightweight design in a folding drawing board equipped with an auxiliary frame adjustment mechanism. Summary of the Invention

[0004] This application provides a folding drawing board, and the drawing board according to this application can overcome at least one or more problems existing in the prior art.

[0005] A folding drawing board includes a board surface, a bottom frame, a support frame, and an auxiliary frame. The front surface of the board surface is flat for placing drawing paper. The bottom of the back surface of the board surface is hinged to one side of the bottom frame, and the middle of the back surface of the board surface is hinged to one side of the support frame. There are several card slots on the surface of the bottom frame facing the board surface; the auxiliary frame is slidably connected to both sides of the board surface.

[0006] For the folding drawing board provided in this application, when storing, the bottom frame and the support frame fold towards the board surface, reducing the volume of the drawing board and facilitating carrying; when using, the board surface and the bottom frame are arranged to unfold at an angle, and the bottom of the support frame is inserted into a card slot on the bottom frame that matches it, so that the tilt angle of the board surface can be adjusted for convenient painting; and the auxiliary frame can be used to draw horizontal auxiliary lines.

[0007] In a possible implementation, the auxiliary frame includes a cross beam and side plates. There is a side plate on each side of the cross beam. The side plates are slidably connected to the side edges of the board surface, and there is a gap through which the drawing paper can pass between the cross beam and the front surface of the board surface.

[0008] In a possible implementation, the bottom frame is in a "U" shape, and the two open ends are connected to the board surface through hinge connection fittings; two hinge seats are symmetrically arranged on the inner side of the bottom frame in the middle of the back surface of the board surface, and the two ends of the top of the support frame are respectively inserted into the adjacent hinge seats for rotational connection. There are outwardly protruding bending parts on both sides of the bottom of the support frame.

[0009] In a possible implementation, when the support frame is arranged parallel to the board surface, there is a storage groove on the bottom frame at the bending part of the support frame.

[0010] In one possible implementation, a handwheel is provided on at least one side panel of the auxiliary frame, the handwheel is threadedly connected to the side panel via a screw, a groove is provided on the side of the side panel facing the panel surface, and a mortgage seat connected to the screw on the handwheel is provided in the groove.

[0011] In one possible implementation, the four corners of the back side of the board are rotatably connected to fixed wheels, a closed rope sleeve is set on the four fixed wheels, the two outer sides of the rope are set in parallel, the two inner sides of the rope are set crosswise, and the side panels of the auxiliary frame are fixedly connected to the outer sides of the ropes adjacent to them through connecting parts.

[0012] In a possible implementation, one inner side of the wire rope is pressed on the other inner side, and the two inner sides of the wire rope are tensionedly connected to a plurality of tensioning wheels, and the tensioning wheels are rotationally connected to the back side of the board.

[0013] In a possible implementation, a wheel groove is provided on the outer periphery of the fixed wheel, the wire rope rests in the wheel groove, an angle seat is provided on the outer side of a partial outer edge of the fixed wheel, and a side of the angle seat facing the fixed wheel is an arc surface.

[0014] The auxiliary frame of the folding drawing board provided in the present application pulls one side of the auxiliary frame, and the rope rotates on the outer periphery of the fixed wheel. The two outer edges of the rope move in the same direction and at an equal distance. The two sides of the auxiliary frame can move up and down at the same time, and the precision requirements for the sliding connection between the side panels of the auxiliary frame and the board surface are lower, thereby saving processing costs while achieving the expected goals.

[0015] It should be noted that the above-mentioned various possible implementation methods can be combined under the premise that the solutions are not contradictory. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a folding drawing board provided in an embodiment of the present application.

[0017] Figure 2 This is a structural schematic diagram of a folding drawing board from another angle provided in an embodiment of the present application.

[0018] Figure 3 This is a bottom view of a folding drawing board provided in an embodiment of the present application.

[0019] Figure 4 yes Figure 2 Schematic diagram of the internal structure of the middle side panel.

[0020] Description of reference numerals:

[0021] 10. Plate surface; 11. Fixed wheel; 111. Wheel groove; 12. Tensioning wheel; 13. Wire rope; 131. First rope part; 132. Second rope part; 133. Third rope part; 134. Fourth rope part; 14. Hinge seat; 15. Angle seat; 20. Underframe; 21. Rope groove; 22. Card slot; 23. Storage groove; 24. Rubber pad; 30. Bracket; 31. Bending part; 40. Auxiliary frame; 41. Cross beam; 42. Side plate; 421. Connection part; 43. Sunk groove; 44. Hand wheel; 441. Mortgage seat. Detailed implementation manner

[0022] The present application will be described below with reference to the accompanying drawings, in which several embodiments of the present application are shown.

[0023] An embodiment of the present application provides a folding drawing board. Please refer to Figure 1 and Figure 2 , Figure 1 and Figure 2 which show the structure of the drawing board from different angles. The drawing board includes a plate surface 10, an underframe 20 and a bracket 30. The front surface of the plate surface 10 is flat for placing drawing paper. The bottom of the back surface of the plate surface 10 is hinged to one side of the underframe 20, and the middle of the back surface of the plate surface 10 is hinged to one side of the bracket 30. A plurality of card slots 22 are provided on the surface of the underframe 20 facing the plate surface 10.

[0024] During use, the plate surface 10 and the underframe 20 are arranged to be unfolded at an angle. The bottom of the bracket 30 is inserted into a card slot 22 on the underframe 20 that matches it, and the inclination angle of the plate surface 10 can be adjusted;

[0025] During storage, the plate surface 10 is arranged parallel to the underframe 20 and the bracket 30, reducing the volume of the drawing board and facilitating carrying.

[0026] Specifically, the underframe 20 is in a "U" shape, and both ends of the opening are connected to the plate surface 10 through hinge connection fittings; two hinge seats 14 are symmetrically provided on the inner side of the underframe 20 in the middle of the back surface of the plate surface 10. The two ends of the top of the bracket 30 are respectively inserted into the adjacent hinge seats 14 for rotational connection, and bending parts 31 protruding outward are provided on both sides of the bottom of the bracket 30.

[0027] When the bracket 30 is arranged parallel to the plate surface 10, a storage groove 23 is provided on the underframe 20 at the bending part 31 of the bracket 30. In this way, in the storage state, the underframe 20 can fix the bracket 30.

[0028] In order to prevent the underframe 20 from sliding, a rubber pad 24 is further provided on the lower surface of the underframe 20.

[0029] Artists or graphic designers usually need to use horizontal auxiliary lines during the creative process to maintain accuracy, balance and perspective and provide visual references. Therefore, an auxiliary frame 40 that can move up and down synchronously on both sides is required.

[0030] The auxiliary frame 40 includes a crossbeam 41 and a side plate 42. A side plate 42 is provided on each side of the crossbeam 41. The side plates 42 are slidably connected to the side edges of the board surface 10. A gap is provided between the crossbeam 41 and the front of the board surface 10 so that drawing paper can pass through.

[0031] In order to make the adjustment smoother and enable the auxiliary frame 40 to be clamped on the board surface 10, a hand wheel 44 is provided on at least one side plate 42 of the auxiliary frame 40, and the hand wheel 44 is threadedly connected to the side plate 42 through a screw rod, such as Figure 4 As shown, a side plate 42 is provided with a recessed groove 43 on the side facing the board surface 10, and a mortgage seat 441 connected to a screw on a hand wheel 44 is provided in the recessed groove 43; when the auxiliary frame 40 is adjusted to a suitable position, the hand wheel 44 is tightened to make the mortgage seat 441 abut against the board surface 10; when the auxiliary frame 40 needs to be adjusted, the hand wheel 44 is unscrewed to make the abutment seat away from the board surface 10.

[0032] See also Figure 3 , Figure 3 An auxiliary frame 40 structure that can be adjusted synchronously on both sides is shown. The four corners of the back side of the board 10 are rotatably connected to fixed wheels 11, and a closed rope 13 is set on the four fixed wheels 11. The two parallel sides of the rope 13 are arranged parallel to the side edges of the board 10. A side panel 42 is provided on each side of the auxiliary frame 40, and the side panel 42 is fixedly connected to the rope 13 through a connecting portion 421.

[0033] The parallel sides on both sides of the rope 13 are the first rope portion 131 and the third rope portion 133 respectively, and the crossing sides in the middle of the rope 13 are the second rope portion 132 and the fourth rope portion 134 respectively. One side plate 42 is fixed on the first rope portion 131, and the other side plate 42 is fixed on the third rope portion 133; one crossing side of the rope 13 is pressed on top of the other crossing side, that is, the second rope portion 132 is pressed on the fourth rope portion 134.

[0034] In order to keep the wire rope 13 taut, the cross edges of the wire rope 13 are tensionedly connected to a plurality of tensioning wheels 12 , and the tensioning wheels 12 are rotationally connected to the back side of the board surface 10 .

[0035] Furthermore, a wheel groove 111 is provided on the outer periphery of the fixed wheel 11 and the tensioning wheel 12, and the rope 13 rests in the wheel groove 111. An angle seat 15 is provided on the outer side of a partial outer edge of the fixed wheel 11 to prevent the rope 13 from escaping from the fixed wheel 11, and the side of the angle seat 15 facing the fixed wheel 11 is an arc surface.

[0036] When the board surface 10 and the bottom frame 20 are arranged in parallel, a rope groove 21 for storing the rope 13 is provided on a side of the bottom frame 20 facing the board surface 10 at the intersection of the rope 13 and the bottom frame 20 .

[0037] When in use, one side of the auxiliary frame 40 is pulled, and the rope 13 rotates on the outer periphery of the fixed wheel 11. The two parallel sides of the rope 13 move in the same direction and at an equal distance. The two sides of the auxiliary frame 40 can move up and down at the same time, and the precision requirements for the sliding connection between the side panel 42 of the auxiliary frame 40 and the board surface 10 are lower, thereby saving processing costs while achieving the expected goals.

[0038] Although the exemplary embodiments of the present application have been described, it should be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present application without departing from the spirit and scope of the present application in essence. Therefore, all changes and modifications are included in the protection scope of the present application as defined by the claims. The present application is defined by the attached claims, and the equivalents of these claims are also included.

Claims

1. A folding drawing board, comprising a board surface (10), a bottom frame (20), a bracket (30) and an auxiliary frame (40), wherein the front side of the board surface (10) is flat and is used for placing drawing paper, and is characterized in that: The bottom of the back surface of the plate surface (10) is hinged to one side of the chassis (20), and the middle of the back surface of the plate surface (10) is hinged to one side of the support (30). A plurality of card slots (22) are provided on the surface of the chassis (20) facing the plate surface (10); the auxiliary support (40) is slidably connected to both sides of the plate surface (10).

2. The folding drawing board according to claim 1, characterized in that: The auxiliary support (40) includes a cross beam (41) and side plates (42). One side plate (42) is provided on each side of the cross beam (41). The side plates (42) are slidably connected to the side edges of the plate surface (10). A gap through which drawing paper can pass is provided between the cross beam (41) and the front surface of the plate surface (10).

3. The folding drawing board according to claim 1, characterized in that: The chassis (20) is in a "U" shape, and both ends of the opening are connected to the plate surface (10) through hinge connection fittings; two hinge seats (14) are symmetrically provided on the inner side of the chassis (20) at the middle of the back surface of the plate surface (10). The two ends of the top of the support (30) are respectively inserted into the adjacent hinge seats (14) for rotational connection. Bent portions (31) protruding outward are provided on both sides of the bottom of the support (30).

4. The folding drawing board according to claim 3, characterized in that: When the support (30) is arranged parallel to the plate surface (10), a storage groove (23) is provided on the chassis (20) at the bent portion (31) of the support (30).

5. The folding drawing board according to claim 2, characterized in that: A hand wheel (44) is provided on at least one side plate (42) of the auxiliary support (40). The hand wheel (44) is threadedly connected to the side plate (42) through a screw. A sink groove (43) is provided on the side of the side plate (42) facing the plate surface (10). A mortgage seat (441) connected to the screw on the hand wheel (44) is provided in the sink groove (43).

6. The folding drawing board according to claim 2, characterized in that: Fixed wheels (11) are rotatably connected to the four corners of the back surface of the plate surface (10). A closed wire rope (13) is sleeved on the four fixed wheels (11). The two outer sides of the wire rope (13) are arranged in parallel, and the two inner sides of the wire rope (13) are arranged in a cross shape. The side plate (42) of the auxiliary support (40) is fixedly connected to the outer side of the adjacent wire rope (13) through a connecting portion (421).

7. The folding drawing board according to claim 6, characterized in that: One inner side of the wire rope (13) is pressed on the other inner side. The two inner sides of the wire rope (13) are tightly connected to a plurality of tension wheels (12). The tension wheels (12) are rotatably connected to the back surface of the plate surface (10).

8. The folding drawing board according to claim 6, characterized in that: A wheel groove (111) is provided on the outer circumference of the fixed wheel (11). The wire rope (13) abuts against the wheel groove (111); an angle seat (15) is provided on the outer side of a partial outer edge of the fixed wheel (11). The surface of the angle seat (15) facing the fixed wheel (11) is an arc surface.

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