A multi-functional drawing table

Abstract

The present invention provides a multifunctional drawing table, which comprises a chassis and a tabletop. The chassis includes front support legs, rear support legs, a baffle, and a flipping frame. The two front support legs are arranged side by side left and right and are inclined backward at the upper part. The baffle is fixedly arranged between the two support legs. One inclined rear support leg is fixedly arranged at the rear side of the lower part of each of the two support legs. The tops of the two support legs are hinged to a flipping frame through a hinge shaft. The tabletop is horizontally arranged and its bottom is fixedly connected to the tops of the two flipping frames through fasteners. A limit set screw is fixedly arranged at the rear side of the top of the left front support leg and the right front support leg. The limit set screw abuts against the bottom of one of the corresponding flipping frames. A limit set screw is arranged between the front support leg and the flipping frame. An arc-shaped limit hole is arranged on the flipping frame. The limit set screw passes through the limit hole and is threadedly connected to the front support leg. This multifunctional drawing table can solve the technical problem of the single function of the traditional drawing table.

Description

Technical Field

[0001] The present invention relates to the technical field of teaching tools, and particularly to a multifunctional drawing table. Background Art

[0002] A drawing table belongs to a teaching tool and is a tool that teachers and students who practice drawing need to purchase. The drawing table is equivalent to a drawing board. The drawing tabletop in the existing technology is fixed. Although using such a fixed tabletop has the advantages of simple structure, good stability and no movement, etc., there are also problems such as inconvenient use, inability to effectively adjust the height and angle, etc., which bring inconvenience to users. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide a multifunctional drawing table to solve the technical problem of the single function of the traditional drawing table.

[0004] To solve the above technical problem, the technical solution of the present invention is: a multifunctional drawing table, including a chassis and a table board. The chassis includes front support legs, rear support legs, a baffle and a flip frame. The two front support legs are arranged side by side left and right and their upper parts are inclined backward. A baffle is fixedly arranged between the two support legs. A slantingly arranged rear support leg is fixedly arranged at the rear side of the lower parts of the two support legs. The tops of the two support legs are both hinged to a flip frame through a hinge shaft. The table board is horizontally arranged and its bottom is fixedly connected to the tops of the two flip frames through fasteners. A limit top screw is fixedly arranged at the rear side of the top of the left front support leg and the right front support leg. The limit top screw abuts against the bottom of a corresponding flip frame. A limit top screw is arranged between the front support leg and the flip frame. An arc-shaped limit hole is arranged on the flip frame. The limit top screw passes through the limit hole and is threadedly connected to the front support leg.

[0005] Preferably, the front support leg further includes a lifting device, which includes an upper connecting sleeve, a lower connecting sleeve, a transmission shaft, a guide post and a lifting mechanism. The upper part of the front support leg is provided with a first installation cavity with an open top. The lower connecting sleeve is fixedly installed in the first installation cavity. The guide post is fixedly arranged in the inner cavity of the lower connecting sleeve. A threaded hole is provided on the guide post body. The lower end of the upper connecting sleeve is sleeved on the guide post. The top of the upper connecting sleeve is provided with a second installation cavity. The lifting mechanism includes a lead screw, a driving bevel gear, a driven bevel gear, a transmission shaft and a crank. The lower end of the lead screw is screwed into the threaded hole on the guide post. The upper part of the lead screw extends into the second installation cavity and is rotatably connected with the upper connecting sleeve. The top end of the lead screw is fixedly installed with the driven bevel gear. The transmission shaft horizontally penetrates the second installation cavity. The driving bevel gear is fixedly installed on the transmission shaft in the second installation cavity. The driving bevel gear and the driven bevel gear in the second installation cavity are meshed with each other. The transmission shaft also serves as the hinge shaft. A crank is installed at one end head of the transmission shaft. The crank includes a support arm, a support shaft and a handle. One end of the support arm is fixedly connected with the transmission shaft. The support shaft is fixedly installed at the other end of the support arm and is arranged perpendicular to it. The handle is cylindrical and sleeved on the support shaft. The handle is rotatably connected with the support shaft.

[0006] Preferably, the turnover frame includes a top plate, an inner side plate and an outer side plate. A limiting groove is formed between the inner side plate and the outer side plate. The top of the front support leg is arranged in the limiting groove. The limiting hole is arranged on the outer side plate.

[0007] Preferably, a guide tube is fixedly arranged on the inner side plate. The transmission shaft penetrates the guide tube.

[0008] Preferably, the lifting device also includes a locking device, which includes a fixed locking piece, a sliding locking piece, a sliding sleeve, a spring, a spur gear, a transmission rope, a guide sleeve and a hand-pick piece. A third mounting cavity is provided inside the support arm, and a fourth mounting cavity is provided inside the handle. The fixed locking piece, the sliding locking piece, the sliding sleeve and the spring are sequentially sleeved on the end portion of the transmission shaft. The fixed locking piece is fixedly mounted on the upper connecting sleeve. A mounting hole is provided on the inner side of the support arm. The end portion of the transmission shaft is inserted into the mounting hole and fixedly connected to the support arm. The sliding sleeve is laterally slidable in the mounting hole. The sliding lock The plate is fixedly connected to the sliding sleeve, the spring is clamped between the sliding sleeve and the inner wall of the support arm, a spur rack is fixedly provided at the bottom of the sliding sleeve, the spur gear is rotatably installed in the third mounting cavity, the spur gear and the spur rack are meshed with each other, the guide sleeve sliding sleeve is arranged on the support shaft, an annular limit baffle is fixedly provided on the outer wall of the guide sleeve, the hand paddle is laterally slidably arranged on the side wall of the handle, a paddle claw that contacts the limit baffle is provided on the inner side of the hand paddle, one end of the transmission rope is wound around the rotating shaft of the spur gear and the other end is fixedly connected to the guide sleeve.

[0009] Preferably, the mounting hole is a hexagonal hole, and the outer contour of the sliding sleeve is a hexagonal column.

[0010] Preferably, the opposite surfaces of the fixed locking plate and the sliding locking plate are both provided with a layer of fine sand.

[0011] The technical effects achieved by adopting the above technical solution are:

[0012] The multifunctional drawing table of the present application adopts a folding structure, which allows the desktop to be laid flat for teachers and students to draw in the classroom, and the desktop can be flipped to a certain angle, and then the desktop can be positioned with a limiting top screw to keep the desktop at a specific angle for teachers and students to use when sketching and painting in the wild. The drawing table of the present application adopts a bracket structure, which is easy to assemble and disassemble, and thus convenient for teachers and students to transport and carry. The desktop can be positioned at any angle as needed, which greatly facilitates teachers and students to draw at different angles. The multifunctional drawing table of the present application has an ingenious structure, and the angle adjustment function of the drawing table can be realized through a simple structure. It is inexpensive, convenient and practical, and is deeply loved by teachers and students of painting majors, and has broad prospects for market promotion and application.

[0013] Since the front support leg further includes a lifting device, the lifting device includes an upper connecting sleeve, a lower connecting sleeve, a transmission shaft, a guide post and a lifting mechanism. The upper part of the front support leg is provided with a first installation cavity with an open top. The lower connecting sleeve is fixedly installed in the first installation cavity. The guide post is fixedly arranged in the inner cavity of the lower connecting sleeve. A threaded hole is provided on the body of the guide post. The lower end of the upper connecting sleeve is sleeved on the guide post. The top of the upper connecting sleeve is provided with a second installation cavity. The lifting mechanism includes a lead screw, a driving bevel gear, a driven bevel gear, a transmission shaft and a crank. The lower end of the lead screw is screwed into the threaded hole on the guide post. The upper part of the lead screw extends into the second installation cavity and is rotatably connected to the upper connecting sleeve. The driven bevel gear is fixedly installed at the top end of the lead screw. The transmission shaft horizontally penetrates the second installation cavity. The driving bevel gear is fixedly installed on the transmission shaft in the second installation cavity. The driving bevel gear and the driven bevel gear in the second installation cavity are meshed with each other. The transmission shaft also serves as the hinge shaft. A crank is installed at one end head of the transmission shaft. The crank includes a support arm, a support shaft and a handle. One end of the support arm is fixedly connected to the transmission shaft. The support shaft is fixedly installed at the other end of the support arm and is perpendicular to it. The handle is cylindrical and sleeved on the support shaft. The handle is rotatably connected to the support shaft. By shaking the crank of the lifting device, the lifting device can be extended or contracted, so as to adjust the height of the drawing table desktop to meet the requirements of teachers and students for positioning the desktop at different heights.

[0014] Since the lifting device also includes a locking device, the locking device includes a fixed locking plate, a sliding locking plate, a sliding sleeve, a spring, a spur gear, a transmission rope, a guide sleeve and a hand-pick plate, a third installation cavity is provided inside the support arm, a fourth installation cavity is provided inside the handle, the fixed locking plate, the sliding locking plate, the sliding sleeve and the spring are sequentially sleeved on the end portion of the transmission shaft, the fixed locking plate is fixedly arranged on the upper connecting sleeve, a mounting hole is provided on the inner side of the support arm, the end portion of the transmission shaft is inserted into the mounting hole and fixedly connected to the support arm, the sliding sleeve is laterally slid into the mounting hole, the sliding locking plate is fixedly connected to the sliding sleeve, the spring is clamped between the sliding sleeve and the inner side wall of the support arm, and the A spur rack is fixedly provided at the bottom of the sliding sleeve, the spur gear is rotatably installed in the third mounting cavity, the spur gear and the spur rack are meshed with each other, the guide sleeve sliding sleeve is arranged on the support shaft, an annular limit baffle is fixedly provided on the outer wall of the guide sleeve, the hand paddle is laterally slidably arranged on the side wall of the handle, a paddle claw that contacts the limit baffle is provided on the inner side of the hand paddle, one end of the transmission rope is wound around the rotating shaft of the spur gear and the other end is fixedly connected to the guide sleeve, the locking device can realize automatic locking of the transmission shaft to prevent teachers and students from accidentally touching the crank handle during the painting process, causing the change of the desktop height and affecting the painting process, the locking device is easy to operate and greatly improves the stability of the drawing table during use.

[0015] Since the opposite surfaces of the fixed locking plate and the sliding locking plate are both provided with a layer of fine sand, the friction between the fixed locking plate and the sliding locking plate can be increased, thereby enhancing the locking effect of the locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 This is the overall structural diagram of the multifunctional drawing table;

[0018] Figure 2 It is the structural diagram of the chassis;

[0019] Figure 3 This is a structural diagram of the reversing frame turning up;

[0020] Figure 4 This is an enlarged view of the structure on the back of the table top;

[0021] Figure 5 It is a structural diagram of the lifting device;

[0022] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0023] In the figure, 1 is the chassis; 11 is the front support leg; 12 is the rear support leg; 13 is the baffle; 14 is the flipping frame; 141 is the top plate; 142 is the inner side plate; 143 is the outer side plate; 144 is the limit hole; 2 is the table board; 3 is the limit set screw; 41 is the upper connecting sleeve; 42 is the lower connecting sleeve; 43 is the guide post; 44 is the lead screw; 45 is the driving bevel gear; 46 is the driven bevel gear; 47 is the transmission shaft; 48 is the crank; 481 is the support arm; 482 is the support shaft; 483 is the handle; 51 is the fixed lock piece; 52 is the sliding lock piece; 53 is the sliding sleeve; 54 is the spring; 55 is the gear; 56 is the transmission rope; 57 is the guide sleeve; 58 is the manual shifter. Detailed implementation mode

[0024] As Figures 1 to 4 As shown in the figure, a multifunctional drawing table includes a chassis 1 and a table board 2. The chassis 1 includes front support legs 11, rear support legs 12, a baffle 13 and a flipping frame 14. The two front support legs 11 are arranged side by side left and right and are inclined backward at the upper part. A baffle 13 is fixedly arranged between the two support legs. An inclined rear support leg 12 is fixedly arranged at the rear side of the lower part of each of the two support legs. The tops of the two support legs are hinged to a flipping frame 14 through a hinge shaft. The table board 2 is horizontally arranged and its bottom is fixedly connected to the tops of the two flipping frames 14 through fasteners. A limit set screw is fixedly arranged at the rear side of the top of the left front support leg 11 and the right front support leg 11. The limit set screw abuts against the bottom of a corresponding flipping frame 14. A limit set screw 3 is arranged between the front support leg 11 and the flipping frame 14. An arc-shaped limit hole 144 is arranged on the flipping frame 14. The limit set screw 3 passes through the limit hole 144 and is threadedly connected to the front support leg 11. Preferably, the flipping frame 14 includes a top plate 141, an inner side plate 142 and an outer side plate 143. A limit groove is formed between the inner side plate 142 and the outer side plate 143. The top of the front support leg 11 is arranged in the limit groove. The limit hole 144 is arranged on the outer side plate 143.

[0025] As Figure 5As shown in the figure, the front support leg 11 further includes a lifting device. The lifting device includes an upper connecting sleeve 41, a lower connecting sleeve 42, a transmission shaft, a guide post 43, and a lifting mechanism. An upper part of the front support leg 11 is provided with a first installation cavity with an open top. The lower connecting sleeve 42 is fixedly installed in the first installation cavity. A guide post 43 is fixedly provided in the inner cavity of the lower connecting sleeve 42. A threaded hole is provided on the body of the guide post 43. The lower end of the upper connecting sleeve 41 is located in the first installation cavity and sleeved on the guide post. A second installation cavity is provided at the top of the upper connecting sleeve 41. The lifting mechanism includes a lead screw 44, a driving bevel gear 45, a driven bevel gear 46, a transmission shaft 47, and a crank 48. The lower end of the lead screw 44 is screwed into the threaded hole on the guide post 43. The upper part of the lead screw 44 extends into the second installation cavity and is rotatably connected to the upper connecting sleeve 41. A driven bevel gear 46 is fixedly installed at the top end of the lead screw 44. The transmission shaft 47 horizontally penetrates the second installation cavity. A driving bevel gear 45 is fixedly installed on the transmission shaft 47 in the second installation cavity. The driving bevel gear 45 and the driven bevel gear 46 in the second installation cavity are meshed with each other. The transmission shaft 47 also serves as a hinge shaft. A crank 48 is installed at one end of the transmission shaft 47. The crank 48 includes a support arm 481, a support shaft 482, and a handle 483. One end of the support arm 481 is fixedly connected to the transmission shaft 47. The support shaft 482 is fixedly installed at the other end of the support arm 481 and is arranged perpendicular to it. The handle 483 is cylindrical and sleeved on the support shaft 482. The handle 483 is rotatably connected to the support shaft 482. By shaking the crank 48 of the lifting device, the lifting device can be extended or contracted, so as to adjust the height of the drawing table top to meet the requirements of teachers and students to position the table top at different heights.

[0026] A guide tube is fixedly provided on the inner side plate 142. The transmission shaft 47 penetrates the guide tube. The guide tube plays a role in limiting and guiding the transmission shaft 47, making the flipping and positioning of the table top more stable.

[0027] As Figure 6 shown in the figure, the lifting device further includes a locking device. The locking device includes a fixed lock piece 51, a sliding lock piece 52, a sliding sleeve 53, a spring 54, a spur gear 55, a transmission rope 56, a guide sleeve 57, and a manual dial 58. A third installation cavity is provided inside the support arm 481. A fourth installation cavity is provided inside the handle 483. The fixed lock piece 51, the sliding lock piece 52, the sliding sleeve 53, and the spring 54 are sequentially sleeved on the end head of the transmission shaft 47. The fixed lock piece 51 is fixedly provided on the front support leg 11. An installation hole is provided on the inner side of the support arm 481. The installation hole is preferably a hexagonal hole.

[0028] The end head of the transmission shaft 47 is inserted into the installation hole and fixedly connected to the support arm 481. The outer contour of the sliding sleeve 53 can preferably be a hexagonal column matching the hexagonal installation hole. The sliding sleeve 53 slides horizontally in the installation hole. The sliding lock piece 52 is fixedly connected to the sliding sleeve 53. The spring 54 is clamped between the sliding sleeve 53 and the inner side wall of the support arm 481.

[0029] A spur rack is fixedly provided at the bottom of the sliding sleeve 53, and a spur gear 55 is rotatably installed in the third installation cavity. The spur gear 55 and the spur rack are meshed with each other. The guide sleeve 57 sliding sleeve 53 is arranged on the support shaft 482, and an annular limit baffle is fixedly provided on the outer wall of the guide sleeve 57. A hand paddle 58 is laterally slidably arranged on the side wall of the handle 483, and a paddle claw is provided on the inner side of the hand paddle 58, which is in conflict with the limit baffle on the side close to the support arm 481. One end of the transmission rope 56 is wound around the rotating shaft of the spur gear 55, and the other end of the transmission rope 56 passes through the side wall of the support arm 481 and is fixedly connected to the guide sleeve 57. The transmission rope 56 is connected to one end of the guide sleeve 57 to pull the spur gear to rotate and drive the spur rack to slide outward. The locking device can realize automatic locking of the transmission shaft 47 to prevent teachers and students from accidentally touching the crank 48 during the painting process, causing the height of the desktop to change and affecting the painting process. The locking device is easy to operate and greatly improves the stability of the drawing table during use.

[0030] The working principle of the multifunctional drawing table of this application is:

[0031] When teachers and students use the drawing table, they lay the table top flat, and the table top of the drawing table can be stably supported in a horizontal position under the joint support of the flip frame 14 and the limiting top screw for use in drawing. When teachers and students need to adjust the angle of the table top, they can flip the table top to a certain angle, and then use the limiting top screw 3 to position the table top so that the table top is kept at a specific angle for use by teachers and students.

[0032] When teachers and students need to adjust the height of the drawing table, they hold the lifting device crank 48 with their hands, and then use their thumb to push the hand paddle 58 outwards. The hand paddle 58 pushes the guide sleeve 57 to slide outwards, and the guide sleeve 57 pulls one end of the transmission rope 56. The spur gear 55 rotates under the pulling action of the other end of the transmission rope 56. The rotation of the spur gear 55 drives the sliding sleeve 53 and the sliding lock plate 52 to move outwards so that the sliding lock plate 52 and the fixed lock plate 51 are separated. Then, by shaking the lifting device crank 48, the lifting device can be extended or contracted, thereby adjusting the height of the drawing table top. When the table top is adjusted to a suitable height, the hand releases the crank 48, and the sliding lock plate 52 automatically returns to its original position and merges with the fixed lock plate 51 under the action of the spring 54, thereby automatically locking the rotation of the transmission shaft 47. The opposite surfaces of the fixed lock plate 51 and the sliding lock plate 52 are provided with a layer of fine sand, which can increase the friction between the fixed lock plate 51 and the sliding lock plate 52 and enhance the locking effect of the locking device.

[0033] The drawing table of this application adopts a bracket structure, which is convenient for assembly and disassembly, thus facilitating transportation and carrying by teachers and students. The tabletop can be positioned at any angle according to needs, greatly facilitating drawing by teachers and students at different angles. The structure of the multifunctional drawing table of this application is ingeniously conceived, and the angle adjustment function of the drawing table can be realized through a simple structure. Moreover, it is inexpensive, convenient and practical, and can be deeply loved by teachers and students majoring in painting, with broad prospects for market promotion and application.

[0034] It is obvious that the above description and record are only examples and not intended to limit the disclosure, application or use of the present invention. Although the embodiments have been described in the examples and shown in the drawings, the present invention does not limit to the specific examples described in the drawings and examples as the currently considered best mode for implementing the teachings of the present invention. The scope of the present invention will include any embodiments falling within the foregoing specification and the appended claims.

Claims

1. A multi-functional drawing table, Characterized in that, It includes a chassis and a tabletop. The chassis includes front support legs, rear support legs, a baffle, and a flipping frame. The two front support legs are arranged side by side left and right and their upper parts are inclined backward. The baffle is fixedly arranged between the two support legs. One inclined rear support leg is fixedly arranged at the rear side of the lower part of each of the two support legs. The tops of the two support legs are hinged to a flipping frame through a hinge shaft. The tabletop is horizontally arranged and its bottom is fixedly connected to the tops of the two flipping frames through fasteners. A limit set screw is fixedly arranged at the rear side of the top of the left front support leg and the right front support leg respectively. The limit set screw abuts against the bottom of a corresponding flipping frame. A limit set screw is arranged between the front support leg and the flipping frame. An arc-shaped limit hole is arranged on the flipping frame. The limit set screw passes through the limit hole and is threadedly connected to the front support leg. The front support leg further includes a lifting device. The lifting device includes an upper connecting sleeve, a lower connecting sleeve, a transmission shaft, a guide post, and a lifting mechanism. The upper part of the front support leg is provided with a first installation cavity with an open top. The lower connecting sleeve is fixedly installed in the first installation cavity. The guide post is fixedly arranged in the inner cavity of the lower connecting sleeve. A threaded hole is arranged on the body of the guide post. The lower end of the upper connecting sleeve is sleeved on the guide post. The top of the upper connecting sleeve is provided with a second installation cavity. The lifting mechanism includes a lead screw, a driving bevel gear, a driven bevel gear, a transmission shaft, and a crank. The lower end of the lead screw is screwed into the threaded hole on the guide post. The upper part of the lead screw extends into the second installation cavity and is rotationally connected to the upper connecting sleeve. The top end of the lead screw is fixedly installed with the driven bevel gear. The transmission shaft horizontally penetrates the second installation cavity. The driving bevel gear is fixedly installed on the transmission shaft in the second installation cavity. The driving bevel gear and the driven bevel gear in the second installation cavity are meshed with each other. The transmission shaft also serves as the hinge shaft. A crank is installed at one end head of the transmission shaft. The crank includes a support arm, a support shaft, and a handle. One end of the support arm is fixedly connected to the transmission shaft. The support shaft is fixedly installed at the other end of the support arm and is perpendicular to it. The handle is cylindrical and sleeved on the support shaft. The handle is rotationally connected to the support shaft. The flipping frame includes a top plate, an inner side plate, and an outer side plate. A limit groove is formed between the inner side plate and the outer side plate. The top of the front support leg is arranged in the limit groove. The limit hole is arranged on the outer side plate. A guide tube is fixedly arranged on the inner side plate. The transmission shaft penetrates the guide tube. The lifting device further includes a locking device. The locking device includes a fixed lock piece, a sliding lock piece, a sliding sleeve, a spring, a straight-tooth gear, a transmission rope, a guide sleeve, and a hand-operated piece. A third installation cavity is arranged inside the support arm. A fourth installation cavity is arranged inside the handle. The fixed lock piece, the sliding lock piece, the sliding sleeve, and the spring are sequentially sleeved on the end head of the transmission shaft. The fixed lock piece is fixedly arranged on the upper connecting sleeve. An installation hole is arranged on the inner side of the support arm. The end head of the transmission shaft is inserted into the installation hole and is fixedly connected to the support arm.The sliding sleeve is slidably mounted in the mounting hole transversely, the sliding locking piece is fixedly connected to the sliding sleeve, the spring is clamped between the sliding sleeve and the inner wall of the support arm, a spur rack is fixedly mounted at the bottom of the sliding sleeve, the spur gear is rotatably mounted in the third mounting cavity, the spur gear and the spur rack are meshed with each other, the guide sleeve is slidably mounted on the support shaft, an annular limit stopper is fixedly mounted on the outer wall of the guide sleeve, the hand paddle is slidably mounted on the side wall of the handle transversely, a toggle claw that contacts the limit stopper is disposed on the inner side of the hand paddle, one end of the transmission rope is wound around the rotating shaft of the spur gear and the other end is fixedly connected to the guide sleeve, and a layer of fine sand is disposed on the opposite surfaces of the fixed locking piece and the sliding locking piece.

Images