Extensible hand drawing board

Abstract

The utility model discloses an extendable hand drawing board, which relates to the technical field of arts and crafts, and comprises a hand drawing board body, the top surface of the hand drawing board body is fixedly connected with a handle, an inner cavity of the hand drawing board body is provided with an extension mechanism, the extension mechanism comprises two guide rails and an extension board. The sealing plate is pulled to move towards the outer side of the hand drawing plate body, the sealing plate drives the extending plate to be pulled out of the hand drawing plate body, meanwhile, the limiting plate slides on the surface of the guide rail, after the positioning block on the side face of the limiting plate moves out of the hand drawing plate body, the pull rod is pulled to move upwards, the pull rod drives the connecting plate to move upwards in the positioning block, and the connecting plate drives the square block to move upwards; and after the extension plate is completely moved out, the pull rod is loosened, the elastic force of the elastic piece is recovered to drive the square block to rebound, and the square block is clamped on the outer side of the hand drawing plate body to be fixed, so that the effect of positioning the extension plate is achieved, and subsequent stable use is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of arts and crafts technology, specifically to a stretchable hand-drawing board. Background Technology

[0002] Arts and crafts mainly study the basic knowledge and skills of aesthetics, color composition, three-dimensional composition, and arts and crafts. It involves the design, color matching, production, protection and restoration of handicrafts. With the continuous development of the art and design industry, the demand for art and design equipment and tools is also constantly increasing. The drawing tablet is a commonly used drawing tool.

[0003] Patent publication number CN211252068U discloses a portable art drawing board that can be extended to expand space, including a drawing board, an extension board and a magnetic layer. The extension board is provided on both the left and right side walls of the inner cavity of the drawing board. The top and bottom of the inner cavity of the drawing board are provided with slide rails. The top and bottom of the extension board are provided with pulleys that cooperate with the slide rails.

[0004] To address the issue that the usable area of ​​a drawing tablet is usually fixed and cannot be extended, existing technology uses extension plates that are slidably connected to the left and right sides of the inner cavity of the drawing tablet via grooves and pulleys. When the extension plates are pulled out, drawing can be done on both extension plates, thus increasing the usable area of ​​the drawing tablet. However, there are still problems such as the device not being able to fix the extension plates after extension, and the extension plates not being on the same plane as the drawing tablet, which leads to poor drawing tablet performance. Utility Model Content

[0005] The purpose of this invention is to provide a stretchable drawing tablet to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] An extendable drawing tablet includes a drawing tablet body, a handle fixedly connected to the top surface of the drawing tablet body, and an extension mechanism provided in the inner cavity of the drawing tablet body.

[0008] The extension mechanism includes guide rails and extension plates. There are two guide rails, which are fixedly connected to the top and bottom surfaces of the inner cavity of the drawing tablet body, respectively. A limit plate is slidably connected to the surface of the guide rails. A positioning component is provided at the bottom side of the limit plate, and a pushing component is provided at the middle side of the limit plate. The extension plate is provided on the surface of the pushing component.

[0009] A further improvement of the present invention is that the positioning component includes a positioning block fixedly connected to the side of the limiting plate, a connecting plate movably sleeved in the inner cavity of the positioning block, a square block fixedly connected to the bottom surface of the connecting plate, and the bottom end of the square block extending below the positioning block.

[0010] A further improvement of this utility model is that: a pull rod is fixedly connected to the middle of the top surface of the connecting plate, the top end of the pull rod extends to the top of the positioning block, an elastic element is fixedly connected to the top surface of the top surface of the positioning block, and the elastic element is sleeved on the outside of the pull rod.

[0011] A further improvement of this utility model is that: there are two limiting plates, and magnetic strips are fixedly connected to the opposite surfaces of the two limiting plates. The two magnetic strips attract each other, and a sealing plate is fixedly connected to the side of the extension plate.

[0012] A further improvement of the present invention is that the pushing component includes a pushing block fixedly connected to the side of the limiting plate, a screw is rotatably connected to the inner cavity of the pushing block, and one end of the screw extends to the outside of the pushing block and is fixedly connected to a rotating plate.

[0013] A further improvement of this utility model is that: the other end of the screw is threadedly connected to a push rod, one end of the push rod extends to the outside of the push block and is fixedly connected to the back of the extension plate, and a washer is fixedly sleeved on the surface of the screw, and the washer is slidably connected to the inner side of the push block.

[0014] A further improvement of this utility model is that: a sliding rod is fixedly connected to the inner cavity of the pushing block, a slider is slidably connected to the surface of the sliding rod, and the top surface of the slider is fixedly connected to the bottom surface of the pushing rod.

[0015] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0016] 1. This utility model provides an extendable drawing tablet, which employs a drawing tablet body, an extension mechanism, a guide rail, a limiting plate, an extension plate, a sealing plate, a magnetic strip, a positioning component, a positioning block, a connecting plate, a square block, an elastic element, and a pull rod. By pulling the sealing plate to move outward from the drawing tablet body, the sealing plate causes the extension plate to be pulled out of the drawing tablet body. At the same time, the limiting plate slides on the surface of the guide rail. When the positioning block on the side of the limiting plate moves out of the drawing tablet body, the pull rod is pulled upward. The pull rod causes the connecting plate to move upward within the positioning block. The connecting plate causes the square block to move upward. The extension plate continues to be pulled outward. When the extension plate is completely moved out, the pull rod is released. The elastic element restores its elasticity, causing the square block to spring back, so that the square block is locked on the outside of the drawing tablet body for fixation. This achieves the effect of positioning the extension plate and ensures stable use in the future.

[0017] 2. This utility model provides an extendable drawing tablet, which uses a push assembly, push block, rotating plate, screw, washer, push rod, slider, and slide bar in cooperation. After the extension plate is fully extended out of the drawing tablet body, rotating the rotating plate drives the screw to rotate. The screw drives the push rod to extend and retract on the screw surface. The push rod drives the extension plate to move forward, so that the extension plate moves to the same horizontal plane as the drawing tablet body. After use, rotating the rotating plate in the opposite direction makes the extension plate move backward. The push rod retracts into the push block, and the back of the extension plate fits against the push block, so that the extension plate can be put into the drawing tablet body, which improves adaptability. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a cross-sectional structural diagram of the drawing tablet body of this utility model;

[0020] Figure 3 This is a schematic diagram of the rear view structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the driving component of this utility model;

[0022] Figure 5 This is a schematic diagram of the positioning component of this utility model.

[0023] In the diagram: 1. Drawing tablet body; 2. Handle; 3. Extension mechanism; 31. Guide rail; 32. Limiting plate; 33. Extension plate; 34. Sealing plate; 35. Magnetic strip; 36. Positioning component; 361. Positioning block; 362. Connecting plate; 363. Square block; 364. Elastic component; 365. Pull rod; 37. Pushing component; 371. Pushing block; 372. Rotating plate; 373. Screw; 374. Washer; 375. Push rod; 376. Slider; 377. Slide rod. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to embodiments:

[0025] Example 1

[0026] like Figure 1-5 As shown, this utility model provides an extendable drawing tablet, including a drawing tablet body 1. A handle 2 is fixedly connected to the top surface of the drawing tablet body 1. An extension mechanism 3 is provided in the inner cavity of the drawing tablet body 1. The extension mechanism 3 includes guide rails 31 and extension plates 33. There are two guide rails 31, which are fixedly connected to the top and bottom surfaces of the inner cavity of the drawing tablet body 1, respectively. A limit plate 32 is slidably connected to the surface of the guide rails 31. A positioning component 36 is provided at the bottom side of the limit plate 32, and a pushing component 37 is provided in the middle side of the limit plate 32. The extension plate 33 is located in the pushing component. On the surface of component 37, positioning assembly 36 includes a positioning block 361 fixedly connected to the side of limiting plate 32. A connecting plate 362 is movably sleeved within the inner cavity of positioning block 361. A square block 363 is fixedly connected to the bottom surface of connecting plate 362, with the bottom end of square block 363 extending below positioning block 361. A pull rod 365 is fixedly connected to the center of the top surface of connecting plate 362, with the top end of pull rod 365 extending above positioning block 361. An elastic element 364 is fixedly connected to the top surface of the top cavity of positioning block 361. 364 is sleeved on the outside of the pull rod 365. There are two limiting plates 32, and magnetic strips 35 are fixedly connected to the opposite surfaces of the two limiting plates 32. The two magnetic strips 35 attract each other. A sealing plate 34 is fixedly connected to the side of the extension plate 33. By pulling the sealing plate 34 to move outward from the drawing tablet body 1, the sealing plate 34 drives the extension plate 33 to be pulled out from the drawing tablet body 1. At the same time, the limiting plate 32 slides on the surface of the guide rail 31. When the positioning block 361 on the side of the limiting plate 32 moves out of the drawing tablet body 1, the pull rod 365 is pulled upward. The pull rod 365 drives the connecting plate 362 to the positioning block 361. The connecting plate 362 moves inward and upward, causing the square block 363 to move upward and compress the elastic element 364 to generate elastic force, which continues to pull the extension plate 33 to move outward. When the extension plate 33 is completely moved out, the pull rod 365 is released, and the elastic element 364 restores its elastic force, causing the square block 363 to spring back, so that the square block 363 is stuck on the outside of the drawing tablet body 1 for fixation, thereby achieving the effect of positioning the extension plate 33. When retracting, the sealing plate 34 is pushed to drive the extension plate 33 into the drawing tablet body 1. At the same time, the two magnetic strips 35 attract each other to limit the extension plate 33 and prevent it from sliding out of the drawing tablet body 1.

[0027] Example 2

[0028] like Figure 1-5As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the pushing assembly 37 includes a pushing block 371 fixedly connected to the side of the limiting plate 32. A screw 373 is rotatably connected to the inner cavity of the pushing block 371. One end of the screw 373 extends to the outside of the pushing block 371 and is fixedly connected to a rotating plate 372. The other end of the screw 373 is threadedly connected to a pushing rod 375. One end of the pushing rod 375 extends to the outside of the pushing block 371 and is fixedly connected to the back of the extension plate 33. A washer 374 is fixedly sleeved on the surface of the screw 373. The washer 374 is slidably connected to the inner side of the pushing block 371. A sliding rod 377 is fixedly connected to the inner cavity of the pushing block 371. A slider 376 is slidably connected to the surface of the slider 377. The top surface of the slider 376 is fixedly connected to the bottom surface of the push rod 375. After the extension plate 33 is fully extended out of the drawing tablet body 1, the rotating plate 372 is rotated to drive the screw 373 to rotate. The screw 373 drives the push rod 375 to extend and retract on the surface of the screw 373. The push rod 375 drives the extension plate 33 to move forward, so that the extension plate 33 moves to the same horizontal plane as the surface of the drawing tablet body 1. After completion, the rotating plate 372 is rotated in the opposite direction, so that the extension plate 33 moves backward. The push rod 375 retracts into the push block 371, and the back of the extension plate 33 is attached to the push block 371, so that the extension plate 33 can be put into the drawing tablet body 1.

[0029] The working principle of this stretchable drawing tablet will be explained in detail below.

[0030] like Figure 1-5As shown, during use, pulling the sealing plate 34 moves it outward from the drawing tablet body 1. The sealing plate 34 causes the extension plate 33 to be pulled out from inside the drawing tablet body 1. At the same time, the limiting plate 32 slides on the surface of the guide rail 31. After the positioning block 361 on the side of the limiting plate 32 moves out of the drawing tablet body 1, the pull rod 365 is pulled upward. The pull rod 365 causes the connecting plate 362 to move upward within the positioning block 361. The connecting plate 362 causes the square block 363 to move upward and compress the elastic element 364 to generate elastic force. The extension plate 33 continues to be pulled outward. When the extension plate 33 is completely moved out, the pull rod 365 is released. The elastic element 364 restores its elastic force and causes the square block 363 to spring back, so that the square block 363 is stuck on the outside of the drawing tablet body 1 for fixation, thereby achieving the effect of positioning the extension plate 33. Then, the rotating plate 37 is rotated. 2. The screw 373 is driven to rotate, and the screw 373 drives the push rod 375 to extend and retract on the surface of the screw 373. The push rod 375 drives the extension plate 33 to move forward, so that the extension plate 33 moves to the same horizontal plane as the surface of the drawing tablet body 1, so that drawing can be performed on the surface of the drawing tablet body 1 and the extension plate 33. After completion, the rotating plate 372 is rotated in the opposite direction, so that the extension plate 33 moves backward, the push rod 375 retracts into the push block 371, and the back of the extension plate 33 is attached to the push block 371. Then, the pull rod 365 is pulled to move the square block 363 upward, pushing the extension plate 33 into the drawing tablet body 1. After releasing the pull rod 365, the two magnetic strips 35 attract each other to limit the extension plate 33 from sliding out of the drawing tablet body 1. Hold the handle 2 to carry the drawing tablet.

[0031] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An extendable hand tablet comprising a hand tablet body (1), characterized in that: The top surface of the hand-drawing board body (1) is fixedly connected with a handle (2), and the inner cavity of the hand-drawing board body (1) is provided with an extension mechanism (3); The extension mechanism (3) comprises guide rails (31) and an extension plate (33), the number of the guide rails (31) is two, the two guide rails (31) are fixedly connected to the top surface and the bottom surface of the inner cavity of the hand-drawing board body (1) respectively, the surface of the guide rail (31) is slidably connected with a limiting plate (32), the side bottom end of the limiting plate (32) is provided with a positioning assembly (36), the side middle part of the limiting plate (32) is provided with a pushing assembly (37), and the extension plate (33) is arranged on the surface of the pushing assembly (37).

2. An extendable hand tablet as claimed in claim 1, characterized in that: The positioning assembly (36) comprises a positioning block (361) fixedly connected to the side of the limiting plate (32), the inner cavity of the positioning block (361) movably sleeved with a connecting plate (362), the bottom surface of the connecting plate (362) fixedly connected with a square block (363), and the bottom end of the square block (363) extends below the positioning block (361).

3. An extendable hand tablet as claimed in claim 2, characterized in that: The top surface of the connecting plate (362) is fixedly connected with a pull rod (365), the top end of the pull rod (365) extends above the positioning block (361), the top surface of the connecting plate (362) is fixedly connected with an elastic element (364), the top end of the elastic element (364) is fixedly connected to the inner cavity top surface of the positioning block (361), and the elastic element (364) is sleeved on the outside of the pull rod (365).

4. An extendable hand tablet as claimed in claim 1, wherein: The number of the limiting plate (32) is two, the opposite surfaces of the two limiting plates (32) are fixedly connected with magnetic strips (35), the two magnetic strips (35) are attracted to each other, and the side of the extension plate (33) is fixedly connected with an enclosing plate (34).

5. An extendable hand tablet as claimed in claim 1, wherein: The pushing assembly (37) comprises a pushing block (371) fixedly connected to the side of the limiting plate (32), a screw rod (373) rotatably connected to the inner cavity of the pushing block (371), and one end of the screw rod (373) extending to the outside of the pushing block (371) and fixedly connected with a rotating plate (372).

6. An extendable hand tablet as claimed in claim 5, characterized in that: The other end of the screw rod (373) is threadedly connected with a pushing rod (375), one end of the pushing rod (375) extends to the outside of the pushing block (371) and is fixedly connected to the back surface of the extension plate (33), the surface of the screw rod (373) is fixedly sleeved with a gasket (374), and the gasket (374) is slidably connected with the inner side of the pushing block (371).

7. An extendable hand tablet according to claim 6, wherein: The inner cavity of the pushing block (371) is fixedly connected with a sliding rod (377), the surface of the sliding rod (377) is slidably connected with a sliding block (376), and the top surface of the sliding block (376) is fixedly connected with the bottom surface of the pushing rod (375).

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