CN103948241B - Omnibearing movable drawing table - Google Patents

Abstract

The all-round motion drawing desk relates to the technical field of mechanical design and solves the problems of insufficient desk height, insufficient space and poor maneuverability existing in conventionally designed desks. It includes four panels, table legs, a three-way transfer mechanism fixed on the side of the first plate and slidingly connected with the chute, a three-section rail guide rail chute slideway installed between the lower surface of the second plate and the upper surface of the third plate, Locking mechanism, 360°circumferential rotation positioning mechanism fixedly connected with the third plate and slidingly connected with the fourth plate, multi-angle tilting mechanism, including two first table legs with arc-shaped grooves and installed on the first table The circular arc of rotation in the arc groove of the legs, the folding mechanism of the table legs, and the lifting mechanism of the desktop. The present invention can be rotated and positioned at 360°, stacked and unfolded and tilted at an appropriate angle to meet the drawing requirements of different map sizes. The height of the desktop can be adjusted to meet the drawing requirements of different heights. The table legs can be folded, which is convenient to place and saves space Convenient and reliable.

Description

Full Motion Drafting Table

technical field

The invention relates to the technical field of mechanical design, in particular to an omnidirectional motion drawing table.

Background technique

In most schools, the desks in classrooms are purchased and arranged for regular classroom design. Although this meets the traditional teaching requirements and students' listening needs, it does not take into account the need for desks required by some majors. special needs. College students have a wide variety of majors, and traditional ordinary desks can no longer satisfy students' daily course study and homework. Taking engineering colleges as an example, professional drawing equipment is needed in mechanical drawing courses or engineering drawing courses, which brings students There are many inconveniences, and most students carry large drawing boards and T-squares to draw in the classroom. The drawing board is not only inconvenient to carry, but also takes up space in the classroom, and the space of the school classroom is limited, a drawing board is already Occupying the entire desk greatly reduces the utilization rate of space and brings great inconvenience to drawing; many desks are not designed from the perspective of ergonomics, such as the angle between the desktop and the horizontal plane is 0 degrees, Such a long-term horizontal drawing and normal class time, bowing the head too low or bowing the head for too long will affect vision and cause cervical spine problems, endangering the health of students. At the same time, the desk cannot be moved and cannot be moved conveniently.

Contents of the invention

In order to solve the problems of insufficient desk height, insufficient space, and poor maneuverability of existing conventionally designed desks, the present invention provides a flexible desk that can be rotated and positioned 360° in the circumferential direction, the desktop can be stacked and unfolded, and the desktop can be tilted at an appropriate angle. , The all-round motion drawing table with adjustable table height and foldable table legs, with its flexible rotation method, makes full use of the space, makes drawing more convenient and reliable, and improves drawing efficiency.

The technical scheme that the present invention adopts for solving technical problems is as follows:

The omnidirectional motion drawing table of the present invention comprises a first board, a second board with a chute, a third board and a fourth board; it also includes:

The three-way handover mechanism installed on the side of the first plate and slidably connected with the chute pushes the first plate to drive the three-way handover mechanism to slide in the chute, slides to the inclined arc of the chute, and then continues to slide down to the bottom for positioning After stopping, make the upper surface of the first plate and the second plate flush;

A three-section rail guide rail chute slideway arranged between the lower surface of the second plate and the upper surface of the third plate;

Locking mechanism for fully deployed first and second panels;

A 360° circumferential rotation positioning mechanism installed on the third plate and the fourth plate for the overall circumferential rotation and positioning of the first plate, the second plate and the third plate relative to the fourth plate;

A desktop lifting mechanism installed on the fourth board for the overall lifting of the first board, the second board and the third board relative to the fourth board;

The multi-angle tilting mechanism comprises two first table legs with arc grooves and a rotating arc installed in the arc grooves of the first table legs, and the rotating arc can be carried out in the arc grooves Multi-angle rotation and tilt;

The table leg folding mechanism includes a support installed on the lower surface of the fourth plate, a support whose two ends are respectively fixed on the support and the rotating arc, and the second table leg whose upper end is connected with the rotating arc and has a plurality of through holes , a hinge arranged at the junction of the second table leg and the rotation arc, a third table leg with a plurality of through holes, and the connection between the second table leg and the third table leg is through the through hole and the connecting pin Cooperating with the fixed connection, the telescopic height is adjusted through the connecting pin, the first table leg is folded inward through the folding support, and the second table leg and the third table leg are folded outward through the folding hinge.

There are two three-way handover mechanisms, located on both sides of the first plate respectively, consisting of a triangular connection and three triangular connection pins, three equiangularly distributed circular holes are arranged on the same circumference of the triangular connection, and the triangular connection pins It is a stepped cylindrical structure, the small cylindrical end is installed in the round hole of the triangular connection, and can rotate in the round hole, the small cylindrical end of a triangular connection pin is fixed on the end side of the first plate, and the remaining two triangular connections The small cylinder end of bolt is slidably installed in the chute of the second plate and can slide in the chute. When not unfolded, the first board and the second board are in a stacked state, and the first board is pulled back when not in use, and the three-way transfer mechanism can slide in reverse.

The locking mechanism includes: a rack fixed on one side of the edge of the lower surface of the second plate; a gear and a plug both fixed on the side of the third plate, the gear meshing with the rack, installed in the plug for locking Hold the positioning pin of the gear; when the first plate and the second plate are fully unfolded, move the first plate and the second plate at the same time, the gear rotates with the rack, when the junction of the first plate and the second plate is located at the third plate When in the middle position, the gear is locked by the positioning pin to lock the relative position between the second plate and the third plate.

The 360°circumferential rotation positioning mechanism includes: an upper sleeve whose upper end is fixed on the third plate through an upper bearing; connected with a sleeve connected to the lower end of the upper sleeve through a key, and the sleeve is connected and installed on the fourth In the central through hole of the plate, the upper sleeve and the sleeve connection can rotate synchronously in the circumferential direction; the lower sleeve is fitted outside the sleeve connection and fixed on the upper surface of the fourth plate through the lower bearing; it is located on the lower surface of the fourth plate Connect the rotating circle with an interference fit with the sleeve, and the sleeve connection can drive the rotating circle to rotate together; the pen holder fixed on the lower surface of the fourth plate through the pen holder, the first spring set on the pen holder, the pen holder at the second The rotating circle can be locked automatically under the elastic force of a spring.

The desktop lifting mechanism includes: a connecting rod fixed on the lower surface of the third plate through the upper support of the connecting rod, and the lower end of the connecting rod is fixed on the upper surface of the fourth plate through the lower support of the connecting rod; fixed on the lower support of the connecting rod The small universal wheel on the top, the wheel part of the small universal wheel is in sliding contact with the fourth plate; the two ends are respectively fixed on the second spring on the lower support of the connecting rod and the lower sleeve; installed in the center of the sleeve connection The screw rod in the through hole, the upper end of the screw rod is threadedly matched with the lower end of the upper sleeve; the screw nut is set on the end of the screw rod; when it is raised, the screw rod is rotated to move vertically upward in the sleeve connection , drives the upper sleeve and the third plate to rotate, and the connecting rod rotates with the third plate. At this time, the second spring stretches the small universal wheel to support the third plate to rise steadily.

It also includes four universal wheels installed at the bottom of the third table leg, which are used for overall movement and position locking of the drafting table.

It also includes a toolbox with a toolbox bracket, the toolbox bracket is installed in the bracket chute of the fourth plate and can slide in the bracket chute, so as to realize the silent drawing and positioning of the toolbox.

The chute of the three-section rail guide rail chute slideway is installed on the lower surface of the second plate, and the slideway of the three-section rail guide rail chute slideway is installed on the upper surface of the third plate; when the first plate and the second plate After fully unfolded, the second plate can move relative to the third plate through the cooperation of the chute on the second plate and the slideway on the third plate, and then the relative position between the second plate and the third plate can be locked by the locking mechanism Achieve the function of balancing the center of gravity and avoiding the tilting of the panel, which increases the stability of the movement.

The beneficial effects of the present invention are:

1. Overall design concept

(1) The designed drawing table should meet the different needs of all students, that is, the design is designed with the convenience of students as the fundamental purpose. The drawing table should be convenient for students to draw, reduce the walking to change the drawing area, and improve the drawing efficiency.

(2) It should meet the requirements of different students' drawing postures for tilt angles, so as to meet ergonomics and students' drawing habits.

(3) The desktop should be able to expand to meet the drawing of drawings of different lengths, and the height should be adjustable to meet the needs of students of different heights.

2. Innovation points

(1) Through the design of the three-way transfer mechanism, the first panel moves in the chute and is completely combined with the second panel.

(2) Through the design of the multi-angle tilting mechanism, the desktop can be tilted through the multi-angle rotation of the tilting bracket, so as to ensure the comfort of drawing.

(3) Through the design of the 360°circumferential rotation and positioning mechanism, the overall 360°rotation of the desktop can be adjusted to facilitate the transformation of the drawing area and improve the drawing efficiency.

3. Function introduction

(1) The desktop can be stacked and expanded to meet the drawing needs of different map frames.

(2) The desktop can be rotated, which can easily change the drawing area and reduce the movement of students when drawing.

(3) The desktop can be tilted at an appropriate angle to conform to the drawing posture and maintain comfort.

(4) The height of the desktop can be adjusted to meet the drawing needs of different heights.

(5) The table legs can be folded, which is convenient to place and save space, and self-locking universal wheels are installed at the same time, which is convenient to move.

(6) The table legs are equipped with self-locking universal wheels for easy movement.

(7) A pull-out toolbox is installed on the lower surface of the fourth panel to facilitate access to drawing tools.

4. Promote application value

The present invention makes full use of the space with its flexible rotation mode, which is unconventional in the design and use of the traditional desk, and adopts the three-way handover mechanism, the 360°circumferential rotation positioning mechanism and the multi-angle tilting mechanism to realize the full layout of the drawing desk. Azimuth movement not only saves the trouble of carrying drawing boards in class, but also facilitates students' drawing, and solves the disadvantages of insufficient space utilization and poor mobility of desks in the past. At the same time, it greatly improves the drawing speed, enhances the comfort of drawing, and is easy to operate. , has high promotional value.

Description of drawings

Fig. 1 is the front view of the omnidirectional motion drawing table of the present invention.

Fig. 2 is a bottom view of the omnidirectional motion drawing table shown in Fig. 1 .

Fig. 3 is a right side view of the omnidirectional motion drawing table shown in Fig. 1 .

Fig. 4 is a schematic structural diagram of a delta connection, Fig. 4a is a front view of a delta connection, and Fig. 4b is a left view of Fig. 4a.

Fig. 5 is a schematic structural diagram of the triangular connection plug.

Fig. 6 is a front view of the turning circle.

Fig. 7 is a sectional view along the line A-A in Fig. 6 .

Figure 8 is a schematic structural view of the pen stand, Figure 8a is a front view of the pen stand, Figure 8b is a cross-sectional view along the direction A-A in Figure 8a, and Figure 8c is a top view of Figure 8a.

Figure 9 is a schematic structural view of the pen holder.

Fig. 10 is a structural schematic diagram of a rotating arc.

Fig. 11 is a schematic structural view of the upper sleeve, Fig. 11a is a front view of the upper sleeve, and Fig. 11b is a left side view of Fig. 11a.

In the figure: 1. pen holder, 2. pen holder, 3. first spring, 4. chute, 5. first board, 6. triangle connection, 7. triangle connection pin, 8. second board, 9. third Plate, 10, connecting rod upper support, 11, connecting rod, 12, connecting rod lower support, 13, small universal wheel, 14, upper bearing, 15, upper sleeve, 16, key, 17, lower bearing, 18. Lower sleeve, 19. Rotation circle, 20. Sleeve connection, 21. Screw nut, 22. Screw rod, 23. Second spring, 24. Support, 25. Bracket, 26. Rotation arc, 27 , the first table leg, 28, the hinge, 29, the second table leg, 30, the third table leg, 31, the universal wheel, 32, the rack, 33, the gear, 34, the plug, 35, the fourth board , 36, tool box, 37, tool box bracket, 38, bracket chute, 39, positioning pin.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Fig. 1, Fig. 2 and Fig. 3, the omnidirectional motion drawing desk of the present invention comprises: first board 5, second board 8, third board 9, fourth board 35, universal wheel 31, toolbox 36 , toolbox bracket 37, bracket chute 38, two three-way handover mechanisms, three-section rail guide rail chute slideway, locking mechanism, 360°circumferential rotation positioning mechanism, multi-angle tilting mechanism, desktop lifting mechanism, table leg folding mechanism .

The two three-way handover mechanisms are respectively located on both sides of the first plate 5, as shown in Figure 3, consisting of a triangular connection 6 and three triangular connection pins 7, as shown in Figure 4a and Figure 4b, the same triangle connection 6 A circle is provided with three equiangularly distributed circular holes, as shown in Figure 5, the triangular connection pin 7 is a stepped cylindrical structure, and the small cylindrical end is installed in the circular hole of the triangular connection 6, and can rotate in the circular hole. As shown in Figure 3, two opposite sides of the second plate 8 are provided with chute 4 on the inside, one end of the chute 4 has a downwardly inclined radian, and the small cylinder end of a triangular connection bolt 7 is fixed on the first plate 5. On the end side, the small cylindrical ends of the remaining two triangular connection bolts 7 are slidably installed in the chute 4 of the second plate 8 and can slide in the chute 4 . When not unfolded, the first plate 5 and the second plate 8 are in a stacked state. At this time, the three-way handover mechanism is at the other end of the chute 4 (without the end of the inclined arc), and when it needs to be unfolded, along the chute 4 Push the first plate 5, the first plate 5 is pushed forward and unfolded under force, and at the same time drives the three-way transfer mechanism to slide along the direction of the chute 4, when the first plate 5 moves in translation to the end of the second plate 8 After the side, the three-way handover mechanism will continue to slide down along the inclined arc of the chute 4, and stop after sliding to the bottom positioning position, so as to ensure the stability of the joint after the panels are unfolded. At this time, the first plate 5 and the second plate The upper surface of the second plate 8 is flush, so as to meet the drawing requirements of large drawings. Pull back the first plate 5 when not in use, the three-way handover mechanism can slide in reverse, and the inclined arc on the chute 4 is conducive to the retraction of the first plate 5 to complete the unfolding movement of the entire panel. The layered stretching and unfolding design is adopted, and the first plate 5 can be freely expanded according to the size of the drawing, and can meet the drawing requirements of large drawings after fully unfolding.

As shown in Figure 3, the locking mechanism is made up of rack 32, gear 33, plug 34 and positioning pin 39, and rack 32 is fixed on one side of the lower surface edge of second plate 8, and gear 33 and plug 34 are all fixed on On the side of the third plate 9, the gear 33 meshes with the rack 32, and the positioning pin 39 is movably installed in the plug 34, and the gear 33 is locked by the positioning pin 39. After the first plate 5 and the second plate 8 are fully expanded, the first plate 5 and the second plate 8 are moved simultaneously, and the gear 33 rotates with the rack 32. When the intersection of the first plate 5 and the second plate 8 is at the first During the middle position of three plates 9, lock gear 33 by positioning pin 39, guarantee that the relative position of gear 33 and rack 32 does not move, to lock the relative position between second plate 8 and the 3rd plate 9, can according to position Need to be locked at any time to meet drawing needs.

A three-section rail guide rail chute slideway is provided between the second plate 8 and the third plate 9, and the chute of the three-section rail guide rail chute slideway is installed on the lower surface of the second plate 8, and the three-section rail guide rail chute slideway is installed on the lower surface of the second plate 8. Slideways are installed on the upper surface of the third board 9 . When the first plate 5 and the second plate 8 are fully unfolded, the second plate 8 can move relative to the third plate 9 through the cooperation of the chute on the second plate 8 with the slideway on the third plate 9, and then through locking The mechanism locks the relative position between the second plate 8 and the third plate 9 to balance the center of gravity, avoid panel inclination, and increase the stability of movement.

As shown in Figure 1, the 360 ° circumferential rotation positioning mechanism includes a pen holder 1, two pen holders 2, a first spring 3, an upper bearing 14, an upper sleeve 15, a key 16, a lower bearing 17, a lower sleeve 18, a rotating Circle 19 and sleeve connection 20. The upper end of the upper sleeve 15 is fixed on the third plate 9 through the upper bearing 14, and the outer lower end of the upper sleeve 15 is connected with the inner part of the upper end of the sleeve connection 20 through a key 16, so that the upper sleeve 15 and the sleeve connection 20 can be synchronously cycled. To rotate, the lower sleeve 18 is sleeved on the outside of the sleeve connection 20 through the lower bearing 17 and the lower sleeve 18 is fixed on the upper surface of the fourth plate 35, and the sleeve connection 20 is installed in the central through hole of the fourth plate 35, The rotating circle 19 is located on the lower surface of the fourth plate 35. The rotating circle 19 is set on the outside of the lower end of the sleeve connection 20 and has an interference fit with the sleeve connection 20. The sleeve connection 20 can drive the rotating circle 19 to rotate together. Rotate the third plate 9, the upper sleeve 15 drives the sleeve connection 20 to rotate synchronously, and through the action relationship of the lower bearing 17, the sleeve connection 20 rotates relative to the lower sleeve 18 through the upper bearing 17, and at the same time drives the rotation circle 19 to rotate , to achieve 360 ° circumferential rotation of the desktop. As shown in FIG. 2 , the first spring 3 is set on the penholder 1 , and the penholder 1 is fixed on the lower surface of the fourth plate 35 through two pen holders 2 . Rotation positioning and adjustment process: Under normal conditions, the pen holder 1 automatically locks the rotation circle 19 under the elastic force of the first spring 3. When it is necessary to adjust the rotation angle, pull the pen holder 1 outward to unlock the self-lock and adjust to the desired angle Finally, unclamp the penholder 1 so far to complete the positioning and adjustment of the steering.

The desktop lifting mechanism comprises two connecting rod upper supports 10, two connecting rods 11, two connecting rod lower supports 12, two small universal wheels 13, screw nuts 21, screw mandrels 22 and two second springs twenty three. The upper end of the connecting rod 11 is fixed on the lower surface of the third plate 9 through the upper support 10 of the connecting rod, the lower end of the connecting rod 11 is fixed on the upper surface of the fourth plate 35 through the lower support 12 of the connecting rod, and the small universal wheel 13 is fixed under the connecting rod On the support 12, the wheel portion of the small universal wheel 13 is in sliding contact with the fourth plate 35, one end of the second spring 23 is connected to the lower support 12 of the connecting rod, the other end is fixed on the lower sleeve 18, and the screw rod 22 is installed on the In the central through hole of the sleeve connection 20, the screw nut 21 is set on the end of the screw mandrel 22. The upper end of the screw mandrel 22 is threadedly matched with the lower end of the upper sleeve 15. During the lifting process, the screw mandrel 22 is rotated to make it The sleeve connection 20 moves vertically upwards, driving the upper sleeve 15 and the third plate 9 to rotate, and the connecting rod 11 rotates with the third plate 9. At this time, the second spring 23 stretches the small universal wheel 13 to support the third plate 9 rises steadily, reaches the required height, and small universal wheel 13 can support the 3rd board 9 to guarantee the stability of desktop rotation.

The table leg folding mechanism includes a support 24 , a bracket 25 , a hinge 28 , a second table leg 29 and a third table leg 30 . As shown in Figure 3, the 3rd table leg 30 comprises two supporting rectangular tubes and four short square tubes, a plurality of through holes are arranged on the four short square tubes, and the second table leg 29 comprises four strips There is a square pipe with a plurality of through holes, and the lower end of the second table leg 29 stretches in the short square pipe of the third table leg 30, and is fixed by connecting pins, and the telescopic height is regulated by connecting pins. The multi-angle inclination mechanism comprises two rotating arcs 26 and two first table legs 27, four bearings 24 are installed on the lower surface of the fourth plate 35, and a support 25 is installed on the lower end of each bearing 24, four The lower end of a support 25 is installed on the two ends of a rotating arc 26 respectively, and the second table leg 29 upper end links to each other with the rotating arc 26, and the hinge 28 is arranged on the junction of the second table leg 29 and the rotating arc 26. When folding, the first table leg 27 is folded inwardly by the folding support 24, and the second table leg 29 and the third table leg 30 are folded outward by the folding hinge 28. The legs are set back to save space. As shown in FIG. 10 , a large circular arc and a small circular arc are arranged on the rotating arc 26 , mounting holes for installing the bracket 25 are provided at both ends of the large circular arc, and multiple mounting holes are provided on the small circular arc. The small arcs of the two rotating arcs 26 are respectively installed in the arc grooves of the two first table legs 27, and the rotating arcs 26 can be rotated and tilted at multiple angles in the first table legs 27, and the desktop is tilted at multiple angles. The design meets the needs of different students' drawing postures for inclination angles, so as to conform to ergonomics and students' drawing habits.

As shown in FIG. 3 , four universal wheels 31 are installed on the two ends of the two rectangular tubes of the third table leg 30 to facilitate the movement of the entire table, and lock immediately when moving to a suitable position.

As shown in Figure 2, two toolbox supports 37 are installed on both sides of the toolbox 36, and two support chutes 38 are installed on the fourth plate 35 lower surface, and two toolbox supports 37 are installed on the two support chutes 38. Among them, the toolbox bracket 37 can slide in the bracket chute 38, and at the same time drive the toolbox 36 to realize the silent pulling and positioning function of the toolbox 36. Tools are stored in it.

In this embodiment, the rack 32 is selected: model name: 1M straight rack, specification size: 1M (model)*10 (tooth width)*10 (tooth height)*1000 (total length), material: 45# steel, unit : mm (mm).

In this embodiment, the gear 33 is selected from: spur gear: 1M25 teeth (standard parts), material: 45 steel, tooth outer diameter: 27MM unquenched, thickness: 10MM, inner hole: 5-8MM, net weight: 0.1KG.

In this embodiment, the three-section rail guide rail chute adopts stainless steel three-section rail guide rail chute, material: cold-rolled steel, stainless steel; surface treatment: blue zinc, black; scope of application: all kinds of drawers; steel plate thickness: 1.2mm; characteristics : Silent and smooth sliding; Maximum load: 45kg. The stainless steel three-section rail guide rail chute is made of good material, not easy to rust, and it can be pulled smoothly and feels comfortable, which fully meets the requirements.

In this embodiment, the small universal wheel 13 is selected: model (NO): C08-01-25-411, wheel diameter (MM): 25 (1 inch), load (KG): 10, installation height (MM): 37, turning radius (MM): 28.

In this embodiment, both the upper bearing 14 and the lower bearing 17 are selected: miniature deep groove ball bearings, model 623ZZ, with an outer diameter of 10 mm, an inner diameter of 3 mm, and a thickness of 4 mm.

In this embodiment, both the first spring 3 and the second spring 23 are selected: YA1X15X20-2LH.

In this embodiment, the universal wheel 31 is selected: the wheel diameter is 40mm, the wheel width is 20mm, the installation height is 60mm, the bottom plate size is 60*43mm, the installation hole distance is 45*30mm, the installation hole diameter is 6.3mm, and the maximum load capacity of a single wheel is 50 kg.

Claims (8)

1. A full range of motion drawing table, comprising a first plate (5), a second plate (8) with a chute (4), a third plate (9) and a fourth plate (35); it is characterized in that it also includes : The three-way handover mechanism installed on the side of the first plate (5) and slidingly connected with the chute (4), pushes the first plate (5) to drive the three-way handover mechanism to slide in the chute (4) and slides to the chute (4) continue to slide down to the bottom after the radian of inclination and stop, so that the upper surfaces of the first plate (5) and the second plate (8) are flush; A three-section rail guide rail chute slideway arranged between the lower surface of the second plate (8) and the upper surface of the third plate (9); Locking mechanism for fully deployed first plate (5) and second plate (8); Installed on the third plate (9) and the fourth plate (35) for the overall rotation of the first plate (5), the second plate (8) and the third plate (9) relative to the fourth plate (35) And positioning 360°circumferential rotation positioning mechanism; Installed on the fourth plate (35) for the first plate (5), the second plate (8) and the third plate (9) to carry out the overall lifting of the desktop relative to the fourth plate (35); The multi-angle tilting mechanism comprises two first table legs (27) with arc grooves and a rotating arc (26) installed in the arc grooves of the first table legs (27), the rotating circle The arc (26) can be rotated and tilted at multiple angles in the arc groove; The table leg folding mechanism includes a support (24) installed on the lower surface of the fourth plate (35), a support (25) whose two ends are respectively fixed on the support (24) and the rotating arc (26), the upper end and the rotating arc (26). The second table leg (29) that arc (26) is connected and has a plurality of through holes, the hinge (28) that is arranged on the intersection of second table leg (29) and rotating arc (26), has The third table leg (30) with a plurality of through holes, the second table leg (29) and the third table leg (30) are fixedly connected through the cooperation of the through hole and the connecting pin, and the telescopic height is adjusted by the connecting pin , the first table leg (27) is folded inward by the folding support (24), and the second table leg (29) and the third table leg (30) are folded outward by the folding hinge (28). 2. The omni-directional motion drawing table according to claim 1, characterized in that there are two three-way transfer mechanisms, located on both sides of the first plate (5) respectively, connected by a triangle (6) and three The triangular connection pin (7) is composed of three equiangularly distributed round holes on the same circumference of the triangular connection (6). The triangular connection plug (7) is a stepped cylindrical structure, and the small cylindrical end is installed on the triangular connection (6). and can rotate in the round hole, the small cylindrical end of a triangular connecting pin (7) is fixed on the end side of the first plate (5), and the small cylindrical ends of the remaining two triangular connecting pins (7) The end is slidingly installed in the chute (4) of the second plate (8) and can slide in the chute (4). When not unfolded, the first plate (5) and the second plate (8) are in a stacked state , the first plate (5) is pulled back when not in use, and the three-way transfer mechanism can slide in reverse. 3. The omnidirectional motion drawing table according to claim 1, characterized in that, the locking mechanism comprises: a rack (32) fixed on one side of the edge of the lower surface of the second plate (8); The gear (33) and plug (34) on the side of the plate (9), the gear (33) meshes with the rack (32), and is installed in the plug (34) for locking the positioning of the gear (33) Pin (39); when the first plate (5) and the second plate (8) are fully unfolded, move the first plate (5) and the second plate (8) simultaneously, and the gear (33) rotates with the rack (32) , when the intersection of the first plate (5) and the second plate (8) is located in the middle of the third plate (9), lock the gear (33) through the positioning pin (39) to lock the second plate (8) and The relative position between the third plates (9). 4. The omnidirectional motion drawing table according to claim 1, characterized in that, the 360° circumferential rotation positioning mechanism includes: an upper sleeve whose upper end is fixed on the third plate (9) through an upper bearing (14) Sleeve (15); a sleeve connection (20) connected to the outside of the lower end of the upper sleeve (15) through a key (16), and the sleeve connection (20) is installed in the central through hole of the fourth plate (35), The upper sleeve (15) and the sleeve connection (20) can rotate synchronously in the circumferential direction; the lower sleeve ( 18); the rotating circle (19) that is located on the lower surface of the fourth plate (35) and the sleeve connection (20) for interference fit, and the sleeve connection (20) can drive the rotating circle (19) to rotate together; through the pen holder (2) The penholder (1) fixed on the lower surface of the fourth plate (35), the first spring (3) set on the penholder (1), the penholder (1) acts on the elastic force of the first spring (3) The rotation circle (19) can be automatically locked down. 5. The omni-directional motion drawing table according to claim 1 or 4, characterized in that, the desktop lifting mechanism comprises: a connecting rod fixed on the lower surface of the third plate (9) through the connecting rod upper support (10) (11), the lower end of the connecting rod (11) is fixed on the upper surface of the fourth plate (35) through the lower support of the connecting rod (12); the small universal wheel (13) fixed on the lower support of the connecting rod 12, The wheel portion of the small universal wheel (13) is in sliding contact with the fourth plate (35); the two ends are respectively fixed on the second spring 23 on the connecting rod lower support (12) and the lower sleeve (18); The screw mandrel (22) in the central through hole of the sleeve connection (20), the upper end of the screw mandrel (22) and the lower end of the upper sleeve (15) are screwed together; it is sleeved on the end of the screw mandrel (22) screw nut (21); turn the screw (22) to move vertically upward in the sleeve connection (20) when rising, and drive the upper sleeve (15) and the third plate (9) to rotate, and the connecting rod ( 11) As the third plate (9) rotates, at this moment, the second spring (23) stretches the small universal wheel (13) to support the third plate (9) to rise steadily. 6. The omni-directional motion drawing table according to claim 1, further comprising four universal wheels (31) installed on the bottom of the third table leg (30) for overall movement and position locking of the drawing table . 7. The omnidirectional motion drawing desk according to claim 1, characterized in that, it also comprises a tool box (36) with a tool box bracket (37), and the tool box bracket (37) is installed on the fourth board ( 35) in the support chute (38) and can slide in the support chute (38), realizing the silent drawing and positioning of the toolbox (36). 8. The omnidirectional motion drawing table according to claim 1, characterized in that, the chute of the three-section rail guide rail chute slideway is installed on the lower surface of the second plate (8), and the three-section rail guide rail chute slide The slideway of the road is installed on the upper surface of the third plate (9); when the first plate (5) and the second plate (8) are fully unfolded, pass through the chute on the second plate (8) and the third plate The slideway on (9) can make the second plate (8) move relative to the third plate (9), and then lock the relative position between the second plate (8) and the third plate (9) through the locking mechanism to achieve The function of balancing the center of gravity and avoiding the tilt of the panel increases the stability of the movement.