CN215125504U

CN215125504U - Multifunctional drawing desk

Info

Publication number: CN215125504U
Application number: CN202120427085.7U
Authority: CN
Inventors: 宁悦; 邓业万
Original assignee: Guangxi City Vocational University
Current assignee: Guangxi City Vocational University
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-12-14
Anticipated expiration: 2031-02-26

Abstract

The utility model provides a multifunctional drawing desk, which comprises a bottom frame and a desk plate, wherein the bottom frame comprises a front supporting leg, a rear supporting leg, a baffle and a turnover frame, the baffle is fixedly arranged between two supporting legs, the rear sides of the lower parts of the two supporting legs are respectively fixedly provided with the rear supporting leg which is obliquely arranged, the tops of the two supporting legs are respectively hinged with one turnover frame through a hinged shaft, the desk plate is horizontally arranged, the bottom of the desk plate is fixedly connected with the two tops of the turnover frame through a fastener, the rear sides of the tops of the front supporting leg and the front supporting leg on the right side are respectively fixedly provided with a limiting jackscrew, the limiting jackscrew is propped against the bottom of the corresponding turnover frame, a limiting jackscrew is arranged between the front supporting leg and the turnover frame, the turnover frame is provided with an arc-shaped limiting hole, the limiting jackscrew passes through the limiting hole and is in threaded connection with the front supporting leg, this multi-functional drawing table can solve traditional drawing table function singleness's technical problem.

Description

Multifunctional drawing desk

Technical Field

The utility model relates to a teaching tool technical field especially relates to a multifunctional drawing desk.

Background

The drawing table is a teaching tool, which is purchased by teachers and students for drawing practice. The drawing table is equivalent to a drawing board, and the drawing table top in the drawing table in the prior art is fixed and unchangeable, and although the fixed and unchangeable table top has the advantages of simple structure, good stability, no movement and the like, the problems of inconvenient use, no effective height and angle adjustment and the like exist, and inconvenience is brought to a user.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the utility model provides a multifunctional drawing table, which solves the technical problem of single function of the traditional drawing table.

In order to solve the technical problem, the technical scheme of the utility model is that: a multifunctional drawing table comprises a base frame and a table plate, wherein the base frame comprises front supporting legs, rear supporting legs, a baffle and a turnover frame, the two front supporting legs are arranged side by side at the left and right sides, the upper parts of the front supporting legs are inclined backwards, the baffle is fixedly arranged between the two supporting legs, the rear sides of the lower parts of the two supporting legs are fixedly provided with the rear supporting legs which are arranged in an inclined manner, the tops of the two supporting legs are hinged with one turnover frame through a hinged shaft, the table plate is horizontally arranged, the bottoms of the horizontal supporting legs are fixedly connected with the tops of the two turnover frames through fasteners, the rear sides of the tops of the front supporting legs and the front supporting legs at the right side are fixedly provided with a limiting jackscrew, the limiting screw is abutted against the bottom of the corresponding turnover frame, a limiting jackscrew is arranged between the front supporting legs and the turnover frame, the turnover frame is provided with an arc-shaped limiting hole, the limiting jackscrew penetrates through the limiting hole to be in threaded connection with the front supporting leg.

Preferably, the front supporting leg further comprises a lifting device, the lifting device comprises an upper connecting sleeve, a lower connecting sleeve, a transmission shaft, a guide post and a lifting mechanism, the upper portion of the front supporting leg is provided with a first mounting cavity with an open top, the lower connecting sleeve is fixedly mounted in the first mounting cavity, the guide post is fixedly arranged in the inner cavity of the lower connecting sleeve, a threaded hole is formed in 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 mounting cavity, the lifting mechanism comprises 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 in the guide post, the upper portion of the lead screw extends into the second mounting cavity and is rotatably connected with the upper connecting sleeve, and the driven bevel gear is fixedly mounted at the top end of the lead screw, the transmission shaft transversely runs through the second installation cavity, on the transmission shaft in second installation cavity fixed mounting has drive bevel gear, drive bevel gear and driven bevel gear intermeshing in the second installation cavity, the transmission shaft does concurrently the articulated shaft, install the one end head portion of transmission shaft the crank, the crank includes support arm, back shaft and handle, support arm one end with transmission shaft fixed connection, back shaft fixed mounting in the support arm other end just sets up rather than mutually perpendicular, the handle is cylindric and the cover is located on the back shaft, the handle with the back shaft rotates and is connected.

Preferably, the roll-over stand includes roof, interior plate and outer panel, form the spacing groove between interior plate and the outer panel, preceding supporting leg top is located the spacing inslot, spacing hole is located on the outer panel.

Preferably, a guide pipe is fixedly arranged on the inner side plate, and the transmission shaft penetrates through the guide pipe.

Preferably, the lifting device further comprises a locking device, the locking device comprises a fixed locking plate, a sliding sleeve, a spring, a straight-tooth gear, a transmission rope, a guide sleeve and a hand-shifting piece, a third installation cavity is arranged inside the support arm, a fourth installation cavity is arranged inside the handle, the fixed locking plate, the sliding sleeve and the spring are sequentially sleeved on the end part of the transmission shaft, the fixed locking plate is fixedly arranged on the upper connection sleeve, an installation hole is formed in the inner side of the support arm, the end part of the transmission shaft is inserted into the installation hole and is fixedly connected with the support arm, the sliding sleeve is transversely slidably arranged in the installation hole, the sliding locking plate is fixedly connected with the sliding sleeve, the spring is clamped between the sliding sleeve and the inner side wall of the support arm, a straight-tooth rack is fixedly arranged at the bottom of the sliding sleeve, and the straight-tooth gear is rotatably arranged in the third installation cavity, straight-teeth gear with straight-teeth gear intermeshing, the uide bushing slip cap is located on the back shaft, the fixed annular spacing separation blade that is equipped with on the uide bushing lateral wall, hand plectrum transversely smooth is located on the lateral wall of handle, hand plectrum inboard be equipped with spacing separation blade inconsistent stir the claw, driving rope one end twine in the pivot of straight-teeth gear and the other end with uide bushing fixed connection.

Preferably, the mounting hole is a hexagonal hole, and the outer profile of the sliding sleeve is hexagonal column-shaped.

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

The technical effect obtained by adopting the technical scheme is as follows:

the utility model provides a multi-functional drawing desk adopts beta structure, both can set level the desktop and supply teachers and students to draw in the classroom and use, can also overturn certain angle with the desktop, then fix a position the desktop with spacing jackscrew, make the desktop keep supplying teachers and students to use when drawing from life in the field at specific angle. The drawing desk of this application adopts supporting structure, the assembly and disassembly of being convenient for to the teachers and students transportation of being convenient for is carried. The desktop can be positioned at any angle according to needs, and great convenience is brought to drawing of teachers and students at different angles. The multifunctional drawing table has the advantages that the structure is ingenious in conception, the angle adjusting function of the drawing table can be achieved through a simple structure, the price is low, convenience and practicability are achieved, the drawing table can be deeply loved by teachers and students in the drawing major, and the market popularization and application prospect is wide.

Because the front supporting leg also comprises a lifting device, the lifting device comprises an upper connecting sleeve, a lower connecting sleeve, a transmission shaft, a guide post and a lifting mechanism, the upper part of the front supporting leg is provided with a first mounting cavity with an open top, the lower connecting sleeve is fixedly arranged in the first mounting cavity, the guide post is fixedly arranged in the inner cavity of the lower connecting sleeve, a threaded hole is arranged 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 mounting cavity, the lifting mechanism comprises 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 mounting cavity and is rotatably connected with the upper connecting sleeve, the driven bevel gear is fixedly arranged at the top end of the lead screw, and the transmission shaft transversely penetrates through the second mounting cavity, the utility model discloses a bearing support, including first installation intracavity, second installation intracavity fixed mounting, the transmission shaft in second installation intracavity fixed mounting have drive bevel gear, drive bevel gear and driven bevel gear intermeshing in the second installation intracavity, the transmission shaft does simultaneously the articulated shaft, install the one end head portion of transmission shaft the crank, the crank includes support arm, back shaft and handle, support arm one end with transmission shaft fixed connection, back shaft fixed mounting in the support arm other end just sets up rather than mutually perpendicular, the handle is cylindric and the cover is located on the back shaft, the handle with the back shaft rotates and is connected. Can make elevating gear extension or shrink through rocking the elevating gear crank to adjust the height of drawing table desktop, with the requirement that satisfies teachers and students with the desktop location in not co-altitude.

Because the lifting device also comprises a locking device, the locking device comprises a fixed locking plate, a sliding sleeve, a spring, a straight-tooth gear, a transmission rope, a guide sleeve and a hand-shifting piece, a third installation cavity is arranged inside the supporting arm, a fourth installation cavity is arranged inside the handle, the fixed locking plate, the sliding sleeve and the spring are sequentially sleeved on the end part of the transmission shaft, the fixed locking plate is fixedly arranged on the upper connecting sleeve, the inner side of the supporting arm is provided with an installation hole, the end part of the transmission shaft is inserted into the installation hole and is fixedly connected with the supporting arm, the sliding sleeve is transversely slidably arranged in the installation hole, the sliding locking plate is fixedly connected with the sliding sleeve, the spring is clamped between the sliding sleeve and the inner side wall of the supporting arm, the bottom of the sliding sleeve is fixedly provided with a straight-tooth rack, and the straight-tooth gear is rotatably arranged in the third installation cavity, straight-tooth gear with straight-tooth rack intermeshing, the uide bushing slip cap is located on the back shaft, the fixed annular spacing separation blade that is equipped with on the uide bushing lateral wall, hand plectrum transversely smooth is located on the lateral wall of handle, hand plectrum inboard be equipped with spacing separation blade is inconsistent stir the claw, driving rope one end twine in the pivot of straight-tooth gear and the other end with uide bushing fixed connection, locking device can realize with transmission shaft automatic locking, avoids teachers and students to bump the crank at drawing in-process mistake and cause the change of desktop height and influence the drawing process, and locking device convenient operation has just improved the stability in the drawing table use greatly.

Because the opposite face of fixed locking plate and sliding lock piece all is equipped with the fine sand of one deck, can increase the frictional force between fixed locking plate and the sliding lock piece, reinforcing locking device's locking effect.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is an overall structural view of a multi-functional drawing table;

FIG. 2 is a block diagram of the chassis;

FIG. 3 is a block diagram of the inversion base flipped up;

FIG. 4 is an enlarged view of the back of the table;

FIG. 5 is a structural view of the lifting device;

FIG. 6 is an enlarged view at A in FIG. 5;

in the figure, 1, a chassis; 11. a front support leg; 12. a rear support leg; 13. a baffle plate; 14. a roll-over stand; 141. a top plate; 142. An inner side plate; 143. an outer panel; 144. a limiting hole; 2. a table plate; 3. limiting jackscrews; 41. connecting sleeves are arranged; 42. a lower connecting sleeve; 43. a guide post; 44. a screw rod; 45. a drive bevel gear; 46. a driven bevel gear; 47. a drive shaft; 48. a crank; 481. a support arm; 482. a support shaft; 483. a handle; 51. fixing the locking plate; 52. sliding the locking plate; 53. a sliding sleeve; 54. A spring; 55. a gear; 56. a drive rope; 57. a guide sleeve; 58. a hand-pulling sheet.

Detailed Description

As shown in figures 1-4, a multifunctional drawing table comprises an underframe 1 and a table plate 2, the underframe 1 comprises front supporting legs 11, rear supporting legs 12, a baffle 13 and a roll-over stand 14, the two front supporting legs 11 are arranged side by side at the left and right sides, the upper parts of the front supporting legs are inclined backwards, the baffle 13 is fixedly arranged between the two supporting legs, the rear sides of the lower parts of the two supporting legs are fixedly provided with the rear supporting legs 12 which are arranged obliquely, the tops of the two supporting legs are hinged with the roll-over stand 14 through a hinged shaft, the table plate 2 is horizontally arranged, the bottoms of the table plate 2 are fixedly connected with the tops of the two roll-over stands 14 through fasteners, the rear sides of the tops of the front supporting legs 11 at the left side and the front supporting legs 11 at the right side are fixedly provided with limit jackscrews which are abutted against the bottoms of the corresponding roll-over stands 14, the limit jackscrews 3 are arranged between the front supporting legs 11 and the roll-over stands 14, the roll-over stands 14 are provided with arc limit holes 144, the limiting jackscrew 3 passes through the limiting hole 144 and is in threaded connection with the front supporting leg 11. Preferably, the roll-over stand 14 comprises a top plate 141, an inner side plate 142 and an outer side plate 143, a limiting groove is formed between the inner side plate 142 and the outer side plate 143, the top of the front supporting leg 11 is arranged in the limiting groove, and a limiting hole 144 is arranged on the outer side plate 143.

As shown in fig. 5, the front supporting 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, the upper portion of the front supporting leg 11 is provided with a first mounting cavity with an opening at the top, the lower connecting sleeve 42 is fixedly mounted in the first mounting cavity, the guide post 43 is fixedly disposed in the inner cavity of the lower connecting sleeve 42, a threaded hole is disposed on the body of the guide post 43, the lower end of the upper connecting sleeve 41 is located in the first mounting cavity and sleeved on the guide post, the top of the upper connecting sleeve 41 is provided with a second mounting cavity, 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 portion of the lead screw 44 extends into the second mounting cavity and is rotatably connected with the upper connecting sleeve 41, the top end of the lead screw 44 is fixedly provided with the driven bevel gear 46, the transmission shaft 47 transversely penetrates through the second mounting cavity, a driving bevel gear 45 is fixedly arranged on the transmission shaft 47 in the second mounting cavity, the driving bevel gear 45 in the second mounting cavity is meshed with a driven bevel gear 46, the transmission shaft 47 is also used as a hinge shaft, a crank 48 is arranged at the end of one end of the transmission shaft 47, the crank 48 comprises a support arm 481, a support shaft 482 and a handle 483, one end of the support arm 481 is fixedly connected with the transmission shaft 47, the support shaft 482 is fixedly arranged at the other end of the support arm 481 and is perpendicular to the support arm 481, the handle 483 is cylindrical and is sleeved on the support shaft 482, and the handle 483 is rotatably connected with the support shaft 482. Lifting device extension or shrink can be made through rocking lifting device crank 48 to adjust the height of drawing table desktop, with the requirement that the teacher and student is fixed a position the desktop in not co-altitude.

The fixed stand pipe that is equipped with on the interior curb plate 142, transmission shaft 47 run through the stand pipe, and the stand pipe plays the effect of spacing direction to transmission shaft 47, makes the upset and the location of desktop more stable.

As shown in fig. 6, the lifting device further includes a locking device, the locking device includes a fixed locking plate 51, a sliding locking plate 52, a sliding sleeve 53, a spring 54, a spur gear 55, a transmission rope 56, a guide sleeve 57 and a hand-pulling plate 58, a third installation cavity is provided inside the support arm 481, a fourth installation cavity is provided inside the handle 483, the fixed locking plate 51, the sliding locking plate 52, the sliding sleeve 53 and the spring 54 are sequentially sleeved on the end portion of the transmission shaft 47, the fixed locking plate 51 is fixedly provided on the front support leg 11, an installation hole is provided inside the support arm 481, and a hexagonal hole is preferably provided in the installation hole.

The end of the transmission shaft 47 is inserted into the mounting hole and fixedly connected to the support arm 481, and the outer profile of the sliding sleeve 53 may be preferably in a hexagonal cylinder shape matching with the hexagonal mounting hole. The sliding sleeve 53 is transversely slidably arranged in the mounting hole, the sliding locking plate 52 is fixedly connected with the sliding sleeve 53, and the spring 54 is clamped between the sliding sleeve 53 and the inner side wall of the supporting arm 481.

The bottom of the sliding sleeve 53 is fixedly provided with a spur rack, a straight-tooth gear 55 is rotatably installed in the third installation cavity, the straight-tooth gear 55 is meshed with the straight rack, the sliding sleeve 53 of the guide sleeve 57 is arranged on the support shaft 482, the outer side wall of the guide sleeve 57 is fixedly provided with an annular limiting blocking piece, the hand shifting piece 58 is transversely and slidably arranged on the side wall of the handle 483, the inner side of the hand shifting piece 58 is provided with a shifting claw which is abutted against one side of the limiting blocking piece close to the support arm 481, one end of the transmission rope 56 is wound on the rotating shaft of the straight-tooth gear 55, the other end of the transmission rope 56 penetrates through the side wall of the support arm 481 and is fixedly connected with the guide sleeve 57, one end of the transmission rope 56 connected with the guide sleeve 57 is pulled to enable the straight-tooth gear to rotate to drive the straight rack to slide outwards, the locking device can realize automatic locking of the transmission shaft 47, the phenomenon that the change of the height of a desktop caused by mistakenly touching the crank 48 in the drawing process is avoided, the locking device is convenient to operate, and the stability of the drawing table in the using process is greatly improved.

The working principle of the multifunctional drawing table is as follows:

teacher and student lays the back with the desktop when using this drawing table, can supply teacher and student's drawing to use the desktop stable support of drawing table at horizontal position under the common supporting role of roll-over stand 14 and spacing jackscrew, when teacher and student need adjust the angle of desktop, can overturn the certain angle with the desktop, then fix a position the desktop with spacing jackscrew 3, make the desktop keep supplying teacher and student at specific angle and use.

When the teacher and student need adjust the height of drawing table, take hold elevating gear's crank 48 with the hand, then with the thumb toward outside dial piece 58, dial piece 58 dials uide bushing 57 and slides to the outside, uide bushing 57 pulls the one end of driving rope 56, spur gear 55 rotates under the pulling effect of the driving rope 56 other end, spur gear 55's rotation drives sliding sleeve 53 and sliding lock piece 52 and moves towards the outside and make sliding lock piece 52 and fixed lock piece 51 break away from mutually, then can make elevating gear extension or shrink through rocking elevating gear crank 48, thereby adjust the height of drawing table desktop, after adjusting the desktop to suitable height, hand pine crank 48, sliding lock piece 52 automatic return and fixed lock piece 51 merge under the effect of spring 54 thereby play the effect of automatic locking to the rotation of transmission shaft 47. The opposite surfaces of the fixed locking plate 51 and the sliding locking plate 52 are provided with a layer of fine sand, so that the friction force between the fixed locking plate 51 and the sliding locking plate 52 can be increased, and the locking effect of the locking device is enhanced.

The drawing desk of this application adopts supporting structure, the assembly and disassembly of being convenient for to the teachers and students transportation of being convenient for is carried. The desktop can be positioned at any angle according to needs, and great convenience is brought to drawing of teachers and students at different angles. The multifunctional drawing table has the advantages that the structure is ingenious in conception, the angle adjusting function of the drawing table can be achieved through a simple structure, the price is low, convenience and practicability are achieved, the drawing table can be deeply loved by teachers and students in the drawing major, and the market popularization and application prospect is wide.

It is to be understood that the above description and illustrations are exemplary only and are not intended to limit the present disclosure, application, or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention is intended to include any embodiments that fall within the foregoing description and the appended claims.

Claims

1. A multifunctional drawing desk is characterized by comprising a chassis and a desk plate, wherein the chassis comprises front supporting legs, rear supporting legs, a baffle and a turnover frame, the two front supporting legs are arranged side by side from left to right, the upper parts of the front supporting legs are inclined backwards, the baffle is fixedly arranged between the two supporting legs, the rear sides of the lower parts of the two supporting legs are fixedly provided with the rear supporting legs which are arranged obliquely, the tops of the two supporting legs are hinged with one turnover frame through a hinged shaft, the desk plate is horizontally arranged, the bottom of the desk plate is fixedly connected with the tops of the two turnover frames through fasteners, the rear sides of the tops of the front supporting legs and the front supporting legs on the right side are fixedly provided with a limiting jackscrew, the limiting jackscrew abuts against the bottom of the corresponding turnover frame, a limiting jackscrew is arranged between the front supporting legs and the turnover frame, and an arc-shaped limiting hole is arranged on the turnover frame, the limiting jackscrew penetrates through the limiting hole to be in threaded connection with the front supporting leg.

2. The multi-functional drawing table as claimed in claim 1, wherein the front supporting leg further comprises a lifting device, the lifting device comprises an upper connecting sleeve, a lower connecting sleeve, a transmission shaft, a guiding post, and a lifting mechanism, the upper portion of the front supporting leg is provided with a first mounting cavity with an opening at the top, the lower connecting sleeve is fixedly mounted in the first mounting cavity, the guiding post is fixedly mounted in the inner cavity of the lower connecting sleeve, the guiding post body is provided with a threaded hole, the lower end of the upper connecting sleeve is sleeved on the guiding post, the top of the upper connecting sleeve is provided with a second mounting cavity, the lifting mechanism comprises 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 guiding post, the upper portion of the lead screw extends into the second mounting cavity and is rotatably connected with the upper connecting sleeve, the utility model discloses a handle, including lead screw, transmission shaft, drive shaft, back shaft, support arm, back shaft and driven bevel gear intermeshing, the transmission shaft transversely runs through the second installation cavity, on the transmission shaft in second installation cavity fixed mounting has drive bevel gear, drive bevel gear and driven bevel gear intermeshing in the second installation cavity, the transmission shaft is done simultaneously the articulated shaft, install a tip portion of transmission shaft the crank, the crank includes support arm, back shaft and handle, support arm one end with transmission shaft fixed connection, back shaft fixed mounting in the support arm other end just sets up rather than perpendicular mutually, the handle is cylindric and the cover is located on the back shaft, the handle with the back shaft rotates to be connected.

3. A multi-function drawing table as recited in claim 2 wherein said flip frame includes a top plate, an inner side plate and an outer side plate, said inner side plate and said outer side plate defining a retaining slot therebetween, said front leg tops being disposed in said retaining slot, said retaining hole being disposed in said outer side plate.

4. A multi-function drawing table as in claim 3 wherein a guide tube is fixedly provided on said inner side plate, said drive shaft extending through said guide tube.

5. The multifunctional drawing table as claimed in claim 4, wherein the lifting device further comprises a locking device, the locking device comprises a fixed locking plate, a sliding sleeve, a spring, a spur gear, a transmission rope, a guide sleeve and a hand-pulling plate, a third installation cavity is arranged inside the supporting arm, a fourth installation cavity is arranged inside the handle, the fixed 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, an installation hole is arranged on the inner side of the supporting arm, the end portion of the transmission shaft is inserted into the installation hole and fixedly connected with the supporting arm, the sliding sleeve is transversely slidably arranged in the installation hole, the sliding locking plate is fixedly connected with the sliding sleeve, and the spring is clamped between the sliding sleeve and the inner side wall of the supporting arm, the fixed spur rack that is equipped with in slip cap bottom, the third installation cavity internal rotation is installed straight-tooth gear, straight-tooth gear with straight-tooth rack intermeshing, the uide bushing slip cap is located on the back shaft, the fixed annular spacing separation blade that is equipped with on the uide bushing lateral wall, the hand plectrum transversely slides and locates on the lateral wall of handle, hand plectrum inboard be equipped with the inconsistent claw of stirring of spacing separation blade, driving rope one end twine in the pivot of straight-tooth gear and the other end with uide bushing fixed connection.

6. A multi-function drawing table as in claim 5 wherein said mounting holes are hexagonal holes and said sliding sleeve has a hexagonal cylindrical outer profile.

7. A multi-function drawing desk as recited in claim 6 wherein the opposing faces of the fixed and sliding locking tabs are each provided with a layer of grit.