CN104367009B - Manual and automatic integrated multifunctional drawing desk - Google Patents

Abstract

Manual and automatic integrated multifunctional drawing desk, involving the field of mechanical design, solves the problems of existing ordinary desks with single function, inability to adapt to people of different heights, and inability to adjust the tilt of the desktop, including desktop, base, table legs, and intelligent control The system consists of a motor support plate, a first motor, a first handle, a worm, a worm wheel, a sliding rod, a long shaft bearing, a long shaft, a chain, a key, a washer, a sprocket shaft, a second reinforcing plate, a first reinforcing plate, a sleeve A lifting mechanism consisting of a plate, a positioning block and a sprocket, an inclination changing mechanism consisting of a sliding rod, a second handle, a leading screw, a second motor, a threaded shaft of a support rod, a diamond-shaped extension assembly, a roller and a guide rail. The invention utilizes an inclination angle changing mechanism, a lifting mechanism and an intelligent control system to realize the overall lifting of the desk and the inclination of the desktop, the drawing is convenient and stable, the drawing quality is improved, and good drawing equipment is provided for students who study drawing. The invention has good performance and high efficiency, and is easily accepted by students.

Description

Manual and automatic integrated multifunctional drawing desk

technical field

The invention relates to the technical field of mechanical design, in particular to a manual and automatic integrated multifunctional drawing desk.

Background technique

Desks and chairs used by students occupy a very important position in students' daily study and life. They are inseparable from daily work and have a high utilization rate. Desks and chairs are also an important external environment for cultivating students' good sitting posture. They are integrated with abnormal curvature of the spine. It is also closely related to the occurrence of myopia and myopia, and it is also an important factor affecting the ability to study and work and physical functions. Therefore, the desks and chairs used by students should conform to the principles of ergonomics. This will not only enable students to develop good sitting habits, It can also improve operating efficiency and reduce the incidence of occupational diseases.

According to the survey, there are 200 mechanical drawing courses in colleges and universities across the country, and the number of users is about 400,000. With the rapid development of China's manufacturing industry, the proportion of students studying mechanical drawing courses will increase year by year. Faced with increasingly prominent teaching problems, as well as health concerns, will necessarily require innovative designs for drawing equipment.

At present, most of the existing ordinary desks are composed of desktops, table legs and drawers, with a single function. It is necessary to move the drawing board to and from get out of class or there is no drawing board for drawing; the height of the desk is fixed and cannot meet the needs of people with different proportions of height; It is flat, and engineering drawing needs to be drawn for a long time. Long-term use will cause cervical spine deformation, back pain and other discomfort symptoms.

Contents of the invention

In order to solve the problems existing in the existing ordinary desks such as single function, inability to adapt to people of different heights, and inability to tilt the desktop, the present invention provides a manual and automatic integrated multifunctional drawing desk.

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

A manual and automatic integrated multifunctional drawing desk, including a desktop and two bases, each base is equipped with two table legs; it also includes:

Lifting mechanism, including two table legs on the same base with a cover plate, two ends of the long shaft installed on the top of the two cover plates through long shaft bearings, a worm wheel set on the long shaft, and the worm gear for meshing The worm, the first handle and the first motor fixed at both ends of the worm, the motor support plate fixed on the bracket for installing the first motor, the two sprockets set at both ends of the long shaft, fixed on the sprocket and the long shaft The key between them, a sprocket shaft is fixed at the lower end of each set plate, the upper and lower ends are respectively set on the sprocket and the sprocket shaft and the chain is fixed on a table leg through a positioning block, and the upper and lower ends of each table leg are respectively set There is a sliding rod; the upper sliding rod is installed on the table leg and is slidably connected with the inner side of the cover plate, and the lower end sliding rod is installed on the cover plate and is slidably connected with the outer side of the table leg;

The bracket fixed on the cover plate, the base plate fixed on the plane formed by the upper surface of the bracket and the end surface of the cover plate, and the two desktop brackets respectively installed on the two ends of the base plate and located at the upper ends of the two cover plates, the desktop through The rotating shaft is installed on the desktop bracket;

The inclination angle change mechanism includes: a sliding rod whose two ends are installed in the sliding plane of the desktop bracket and can perform linear reciprocating motion in the sliding plane, a lead screw connected with the sliding rod through a screw pair and located on the bottom plate, respectively fixed on the lead screw The two ends and the second handle and the second motor on the bottom plate, two diamond-shaped extension components installed on the two desktop supports, two guide rails installed on the lower surface of the desktop, respectively installed on the upper ends of the two diamond-shaped extension components and Two rollers that can slide in the chute of the guide rail;

The intelligent control system installed on the upper surface of the desktop and electrically connected with the first motor and the second motor respectively, through the intelligent control system sends out specific electric pulse signals of different time lengths to control the rotation angle and forward and reverse rotation of the first motor and the second motor, and simultaneously drives The worm and lead screw rotate to realize the overall lifting of the desk and the tilting change of the desktop.

It also includes: a telescopic assembly fixed on the bottom plate through a temporary small rod, the telescopic assembly is composed of a plurality of connecting rods and connecting shafts and can expand and contract to both ends with the temporary small rod as the center; two working parts fixed at both ends of the telescopic assembly The two workbenches are respectively located in the square holes of the two desktop supports and can be drawn out therefrom.

It also includes: a tool ruler installed on the upper surface of the desktop; the protruding part at one end of the tool ruler matches with the 3mm groove around the desktop and can slide in the groove.

The lifting mechanism also includes: a first reinforcement plate fixed on the outside of the cover plate, a second reinforcement plate movably placed on the inside of the cover plate and the two ends of which are slidably connected to the insides of the two table legs; one end of the sprocket shaft passes through the first reinforcement plate. The plate is fixed on the outer side of the cover plate, and the other end is fixed on the second reinforcement plate and extends out of the cover plate.

Also included: a washer mounted on the sprocket shaft and inside the second reinforcement plate.

The diamond-shaped extension assembly is composed of multiple lifting rods and small shafts. The rollers are installed at the end of the uppermost lifting rod, and one of the two lowermost lifting rods is installed in the recess of the sliding rod through the threaded shaft of the lifting rod. In the groove, the other is fixed on the desktop support through the shaft.

It also includes: two connecting plates respectively fixed on the two desktop supports, the two desktop supports and the two connecting plates form a rectangular groove, the lead screw and the second motor are located in the rectangular groove and the first The two handles are located outside the connecting plate.

The intelligent control system adopts a high-performance STM32 single-chip microcomputer with a liquid crystal display control panel.

The variation range of the inclination angle of the desktop is 0°-60°.

The positioning block is fixed on the inner side of one of the two table legs on the same base and close to the chain, and a section of the chain is fixed on the table leg through the positioning block.

The beneficial effects of the present invention are:

1. The lifting mechanism moves the desk body along the fixed point through the chain transmission to realize the overall lifting of the desk body to suit people of different heights. The operation is simple and convenient, saving time and effort.

2. The inclination change mechanism adjusts the inclination change of the desktop through the screw drive and the stretching effect of the diamond-shaped extension component, so as to adapt to different drawing angles of view, increase the comfort of drawing, easy to operate, make the drawing process more efficient, comfortable and simple, and save manpower and time.

3. A new horizontal workbench is added, which is conducive to the collection of drawing tools and other items.

4. The addition of the desktop tool ruler makes drawing more convenient and improves the accuracy.

5. The lifting distance of the desk body and the inclination angle of the desktop can be controlled manually according to the user's needs, or can be completed automatically through the intelligent control system, which truly realizes the manual and automatic integration of the drawing desk, embodying humanization, personalization, and satisfaction It meets the requirements of different users for the height of the desktop and the overall desk.

6. The present invention utilizes the principle of ergonomics, utilizes the inclination angle changing mechanism, the lifting mechanism and the intelligent control system to realize the overall lifting of the desk and the inclination of the desktop, the drawing is convenient and stable, and the drawing quality is improved. It provides good drawing equipment for students who study drawing, and brings great convenience to drawing teaching.

7. The present invention has good performance and high efficiency, is easily accepted by students, and has many users. The number of new students learning drawing courses is about 400,000 person-times every year. Therefore, the present invention has a very broad application market and extremely high promotion value.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of the manual and automatic integrated multifunctional drawing desk of the present invention.

Fig. 2 is the front view of the manual and automatic integrated multifunctional drawing desk of the present invention.

Fig. 3 is a left view of the manual and automatic integrated multifunctional drawing desk shown in Fig. 2 .

Fig. 4 is a top view of the manual and automatic integrated multifunctional drawing desk shown in Fig. 2 .

Fig. 5 is a three-dimensional structural schematic diagram of the lifting mechanism.

Fig. 6 is a structural schematic diagram of a table leg.

Fig. 7 is a schematic structural view of the sleeve, wherein Fig. 7a is a front view of the sleeve, Fig. 7b is a left side view of the sleeve shown in Fig. 7a, and Fig. 7c is a top view of the sleeve shown in Fig. 7a.

FIG. 8 is a schematic structural diagram of a positioning block.

In the figure: 1, base, 2, table leg, 3, sprocket wheel, 4, positioning block, 5, cover plate, 6, first reinforcing plate, 7, second reinforcing plate, 8, sprocket wheel shaft, 9, washer, 10, key, 11, chain, 12, long shaft, 13, long shaft bearing, 14, sliding rod, 15, support, 16, worm gear, 17, worm screw, 18, first handle, 19, first motor, 20, Motor support plate, 21, bottom plate, 22, desktop support, 23, connection plate, 24, sliding rod, 25, second handle, 26, leading screw, 27, second motor, 28, threaded shaft of the support rod, 29 , diamond-shaped extension assembly, 30, roller, 31, guide rail, 32, desktop, 33, workbench, 34, temporary stick, 35, telescopic assembly, 36, tool ruler, 37, intelligent control system.

detailed description

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

As shown in Figure 1, the manual and automatic integrated multifunctional drawing desk of the present invention includes: two bases 1, four table legs 2, a support 15, a bottom plate 21, two desktop supports 22, two connecting plates 23, Desktop 32, two workbenches 33, temporary stick 34, telescopic assembly 35, tool ruler 36, intelligent control system 37, lifting mechanism, inclination angle changing mechanism.

As shown in Figure 6, the table leg 2 is a hollow square tube with a fixed mounting hole at one end and a U-shaped groove at the other end. As shown in Figure 1, two table legs 2 are installed on a base 1, and the other two table legs 2 are installed on another base 1, and the fixed mounting hole ends of the table legs 2 extend into the square mounting holes of the base 1 and Fixing by screws leaves a certain distance between the two table legs 2 on the same base 1 . As shown in Figure 5, the bracket 15 includes two parts (wherein part is omitted in Figure 5), both parts are welded by three hollow square tubes in sequence, and the two ends of a part are respectively fixed on two sleeve plates 5 One side of the upper end of the other part, and the two ends of the other part are respectively fixed on the other side of the upper end of the two cover plates 5.

As shown in Figure 5, the lifting mechanism includes a motor support plate 20, a first motor 19, a first handle 18, a worm 17, a worm wheel 16, eight sliding rods 14, two long shaft bearings 13, a long shaft 12, two Chain 11, two keys 10, two washers 9, two sprocket shafts 8, two second reinforcement plates 7, two first reinforcement plates 6, two sleeve plates 5, two positioning blocks 4 and two chains round 3. The two ends of the motor support plate 20 are installed on the bracket 15, the first handle 18 is fixed at one end of the worm 17, and the other end is electrically connected with the first motor 19, the worm 17, the first handle 18 and the first motor 19 are integrally fixed on the motor support plate 20; the worm wheel 16 and the worm 17 are meshed with each other, and the worm wheel 16 is set on the long axis 12; a set plate 5 is set on the two table legs 2 on the same base 1, as shown in Figures 7a, 7b, and 7c , the upper end of the sleeve plate 5 is provided with a mounting hole for installing the long shaft 12, and the two sides of the lower end are provided with a protruding arc structure, and the two ends of the long shaft 12 respectively extend into the upper end mounting holes of the two sleeve plates 5, and the long shaft bearing 13 Set on both ends of the major axis 12 and fixed on the outside of the cover plate 5 (in order to show the lifting mechanism, a cover plate 5 is omitted in Fig. 1, Fig. 2, and Fig. 5), the sprocket 3, the chain 11, the second reinforcement plate 7 , the sprocket shaft 8, and the washer 9 are all located between the two table legs 2 on the same base 1 and inside the cover plate 5, and the two sprockets 3 are respectively set on the two ends of the major axis 12, as shown in Figure 2, A key 10 is installed between the sprocket 3 and the long shaft 12 for connecting the sprocket 3 and the long shaft 12, the upper end of the chain 11 is set on the sprocket 3, the lower end is set on the sprocket shaft 8, and the two ends of the sprocket shaft 8 Stretch out of the cover plate 5, one end of the sprocket shaft 8 is fixed on the cover plate 5 through the first reinforcement plate 6, the other end is fixed on the second reinforcement plate 7 by screws and extends outside the cover plate 5, the first reinforcement plate 6 is fixed On the outside of the cover plate 5, the second reinforcing plate 7 is movably placed on the inside of the cover plate 5 and its two ends are slidingly connected with the inner sides of the two table legs 2, and a positioning block is arranged on the inner side of one table leg 2 close to the chain 11 4. As shown in Figure 8, the positioning block 4 is provided with a mounting hole, and one section of the chain 11 is fixed on the table leg 2 through the positioning block 4. There are eight sliding rods 14 in total, and there are two upper and lower sides of each table leg 2. Two sliding rods 14 are installed at the end, the sliding rod 14 at the lower end is installed in the arc structure of the cover plate 5 and is in a sliding connection relationship with the outside of the table leg 2, and the sliding rod 14 at the upper end is installed in the U-shaped groove of the table leg 2 end and the sliding rod 14 is in a sliding connection relationship with the inner side of the cover plate 5. Rotate the first handle 18, the worm 17 drives the worm wheel 16 to rotate, and the long shaft 12 rotates accordingly. Through the action of the long shaft bearing 13 and the sprocket 3, the chain 11 rotates with the long shaft 12. Due to the action of the positioning block 4, the chain 11 moves upward move, thereby driving the sprocket shaft 8 to move upwards, and the sprocket shaft 8 and the cover plate 5 are in a fixed relationship. Therefore, the sprocket shaft 8 drives the cover plate 5 to move upward along the outer side of the table leg 2 along with the sliding rod 14, thereby realizing the desk as a whole. up and down. The present invention can adjust the height of the desktop 32 according to the height of the user, manually rotate the first handle 18 or make the worm 17 rotate through the intelligent control system 37 on the desktop 32 to realize the overall lifting of the desk. The washer 9 is installed on the sprocket shaft 8 and is located inside the second reinforcing plate 7, and its function is to increase the supporting area of the connected parts to reduce the pressure at the contact point and avoid tightening the nuts.

As shown in Figure 1, the bottom plate 21 is fixed on the plane formed by the upper surface of the bracket 15 and the upper end surface of the cover plate 5. The upper end of cover plate 5, desktop bracket 22 is provided with sliding plane and is used to guide the square hole of workbench 33 horizontal movements, and two connecting plates 23 are fixed on two desktop brackets 22 by screws respectively, by two desktop brackets 22 and two connecting plates 23 form a rectangular groove. There are two protruding structures on the edge of the lower surface of the desktop 32, and the protruding structures are installed on one end of the desktop support 22 through the rotating shaft, and the desktop 32 can realize angular inclination through the effect of the rotating shaft.

As shown in Figure 1, the inclination angle changing mechanism comprises a sliding rod 24, a second handle 25, a lead screw 26, a second motor 27, two threaded shafts 28 of the lifting rod, two diamond-shaped extension assemblies 29, and two rollers 30 And two rails 31. One end of leading screw 26 is equipped with second handle 25, and the other end is electrically connected with second motor 27, and described leading screw 26 and second motor 27 are all positioned in rectangular groove and second handle 25 is positioned at connecting plate 23 outsides, slides Bar 24 and leading screw 26 are helical pair connection relations, and slide bar 24 two ends are installed in the sliding plane of desktop support 22 and can do linear reciprocating motion in sliding plane, and two guide rails 31 are installed on the lower surface of desktop 32. The two diamond-shaped extension assemblies 29 are installed on the two desktop supports 22 respectively. The diamond-shaped extension assemblies 29 are composed of a plurality of lifting rods and small shafts. A roller 30 is installed at the end of the uppermost lifting rod, and the roller 30 is installed on the guide rail 31 at the same time. In the chute, one of the two lifting rods at the lowermost end is installed in the groove of the sliding rod 24 by the lifting rod threaded shaft 28, and the other is fixed on the desktop support 22 by the shaft. Rotate the second handle 25 to drive the lead screw 26 to rotate. Through the screw transmission of the lead screw 26 and the slide rod 24, the slide rod 24 makes a linear reciprocating motion in the slide groove of the desktop bracket 22, and at the same time, the rhombus hinged with the slide rod 24 is stretched. Each component of the component 29 rotates relative to each other, and the desktop 32 changes within a certain angle through the sliding of the roller 30 in the chute of the guide rail 31 .

The variation range of the inclination angle of the desktop 32 is 0°～60°. As a design discipline, there are several ways of drawing, so the existence and size of the inclination angle are very necessary. Actually, when the desktop 32 is inclined at 12° and 24° At this time, the posture of the user is smaller than the movement range of the natural trunk, and the feeling of fatigue and discomfort will be reduced relative to the horizontal work surface. The desktop 32 of the drawing table is generally inclined. 30°, the user must bend forward. In order to adapt to different users, the desktop 32 should be designed to be adjustable, with an inclination angle of 0° to 60°, which increases the stability of the desktop 32 and is in the best viewing area of the user, reducing excessive fatigue of the human eye.

As shown in Figure 1, two workbenches 33 are respectively fixed on the two ends of the telescopic assembly 35, and these two workbenches 33 are respectively located in the square holes of the two desktop brackets 22, and the workbenches 33 can be drawn out from the square holes to expand and contract. Assembly 35 is made up of a plurality of identical connecting rods and connecting shafts, and the middle of telescopic assembly 35 is fixed on the bottom plate 21 by temporary small stick 34, when the inclination angle of desktop 32 changes, through telescopic assembly 35 and temporary small The effect of the working table 33 is still kept horizontal, and drawing tools, water cups, etc. can be placed, which is beneficial to the arrangement and collection of articles and improves the drawing efficiency.

As shown in Figure 4, the tool ruler 36 and the intelligent control system 37 are all installed on the upper surface of the desktop 32, and there is a 3mm groove around the desktop 32, and the groove can cooperate with the protruding part of the tool ruler 36 to slide in the groove, The tool ruler 36 makes the drawing more efficient and more precise, realizes the function of the T-square, makes the drawing more accurate, and greatly improves the drawing efficiency.

As shown in Figure 4, the intelligent control system 37 is electrically connected with the first motor 19 and the second motor 27 respectively, and the rotation angle and the rotation angle of the first motor 19 and the second motor 27 are controlled by the intelligent control system 37 sending specific different time length electric pulse signals. Reversing, simultaneously drives worm screw 17 and leading screw 26 to rotate, realizes the overall lifting of desk and the inclination change of desktop 32. The intelligent control system 37 adopts a high-performance STM32 single-chip microcomputer, comes with an LCD control panel, and has a "memory function", which can remember the student number corresponding to the required table height and desktop inclination after the first use. The calculation of various parameters of the electric pulse signal is completed internally, so as to carry out intelligent adjustment, which makes the adjustment of the height of the table body and the inclination of the table top more accurate and more labor-saving during use.

In this embodiment, the table legs 2 are made of 45# steel.

In this embodiment, the first motor 19 and the second motor 27 are 57BYGH803 stepping motors and 86 stepping motors respectively. The rated power of the 57BYGH803 stepper motor is 10-50W, the rated current is 1.5A, the rated voltage is 12-48V, the rated torque is 1.4NM, and the maximum speed is 1000rpm. The rated power of the 86-type stepping motor is 90W, the rated current is 1.0-4.2A, the rated voltage is 4-50V, the static torque is 12.0NM, and the maximum speed is 1000rpm.

Claims (10)

1. Manual-automatic integrated multifunctional drawing desk, including desktop (32) and two bases (1), pacifies on each base (1) Equipped with two table legs (2)；Characterized in that, also including：

Elevating mechanism, passes through length respectively including cage plate (5), two ends are set with two table legs (2) on same base (1) Axle bearing (13) is arranged on the major axis (12) of two cage plate (5) upper ends, the worm gear (16) being sleeved on major axis (12), and worm gear (16) for engagement worm screw (17), be separately fixed at worm screw (17) two ends first handle (18) and the first motor (19), Being fixed on support (15) is used for the motor support plate (20) for installing the first motor (19), two chains for being sleeved on major axis (12) two ends Wheel (3), the key (10) that is fixed between sprocket wheel (3) and major axis (12), each cage plate (5) lower end be fixed with a sprocket shaft (8), Upper and lower side is set on sprocket wheel (3) and sprocket shaft (8) and is fixed on the chain on a table leg (2) by locating piece (4) (11), the upper and lower side on the outside of each table leg (2) is respectively arranged with a slider bar (14)；Upper end slider bar (14) is arranged on table leg (2) on and with cage plate (5) on the inside of be slidably connected, lower slide rod (14) be arranged on cage plate (5) on and with the outer Slideslip of table leg (2) Connection；

The support (15) that is fixed on cage plate (5), it is fixed on the plane formed by support (15) upper surface and cage plate (5) upper surface On base plate (21), be separately mounted to base plate (21) two ends and respectively positioned at two cage plate (5) upper ends two desk docks (22), described desktop (32) are arranged on desk dock (22) by rotating shaft；

Change of pitch angle mechanism, including：Two ends are arranged in the slip plane of desk dock (22) and can do straight in slip plane The reciprocating sliding bar of line (24), and sliding bar (24) by screw pair connect and be located at base plate (21) on leading screw (26), It is separately fixed at leading screw (26) two ends and the second handle (25) that is located on base plate (21) and the second motor (27), is separately mounted to Two rhombus extension assemblies (29) on two desk docks (22), two guide rails (31) installed in desktop (32) lower surface, It is separately mounted to two rhombus extension assembly (29) upper ends and two rollers (30) that can be slided in the chute of guide rail (31)；

The Based Intelligent Control system for electrically connecting installed in desktop (32) upper surface and with the first motor (19) and the second motor (27) respectively System (37), sends specific different time length electric impulse signal by intelligence control system (37) and controls the first motor (19) and the The corner of two motors (27) and rotating, while driving worm screw (17) and leading screw (26) to rotate, realize desk integral elevating and table Face (32) tilt variation.

2. Manual-automatic integrated multifunctional drawing desk according to claim 1, it is characterised in that also include：Pass through Interim spillikin (34) is fixed on the telescopic component (35) on base plate (21), and telescopic component (35) are by multiple connecting rods and connection Axle is constituted and can be stretched to two ends centered on spillikin (34) temporarily；It is separately fixed at two work at telescopic component (35) two ends Platform (33), the two workbench (33) in the square opening of two desk docks (22) and can be thus drawn out respectively.

3. Manual-automatic integrated multifunctional drawing desk according to claim 1, it is characterised in that also include：Install In the tool ruler (36) of desktop (32) upper surface；The 3mm ditches of tool ruler (36) one end bossing and desktop (32) surrounding Groove coordinates and can slide in groove.

4. Manual-automatic integrated multifunctional drawing desk according to claim 1, it is characterised in that the elevating mechanism Also include：It is fixed on the first reinforcing plate (6) on the outside of cage plate (5), activity to be placed on the inside of cage plate (5) and its two ends and two tables The second reinforcing plate (7) being slidably connected on the inside of lower limb (2)；Sprocket shaft (8) one end is fixed on cage plate by the first reinforcing plate (6) (5), on the outside of, the other end is fixed in the second reinforcing plate (7) and stretches out on the outside of cage plate (5).

5. Manual-automatic integrated multifunctional drawing desk according to claim 4, it is characterised in that also include：Install Packing ring (9) on sprocket shaft (8) and on the inside of the second reinforcing plate (7).

6. Manual-automatic integrated multifunctional drawing desk according to claim 1, it is characterised in that the rhombus stretches Component (29) is made up of multiple lifting levers and little axle, and roller (30) is arranged on the raising boom end of the top, and bottom two is risen One in rising stem is arranged in the groove of sliding bar (24) by playing frame pole thread spindle (28), and another is fixed on by axle On desk dock (22).

7. Manual-automatic integrated multifunctional drawing desk according to claim 1, it is characterised in that also include：Respectively Two connecting plates (23) being fixed on two desk docks (22), described two desk dock (22) and two connecting plates (23) A rectangular recess is formed, leading screw (26) and the second motor (27) are respectively positioned in rectangular recess and second handle (25) is located at On the outside of connecting plate (23).

8. Manual-automatic integrated multifunctional drawing desk according to claim 1, it is characterised in that the Based Intelligent Control System (37) adopts high performance STM32 single-chip microcomputers, carries LCDs control panel.

9. Manual-automatic integrated multifunctional drawing desk according to claim 1, it is characterised in that desktop (32) Angle of inclination excursion be 0 °～60 °.

10. Manual-automatic integrated multifunctional drawing desk according to claim 1, it is characterised in that the locating piece (4) inner side of a table leg (2) being fixed in two table legs (2) on same base (1) and close chain (11), the chain One section of bar (11) is fixed on table leg (2) by locating piece (4).