CN111150241A

CN111150241A - Dual-purpose desk of desk dressing table

Info

Publication number: CN111150241A
Application number: CN202010113793.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Xiamen Fujichu Daily Necessities Co Ltd
Current assignee: Hua Wei Cabinets Co ltd Of Ganzhou City
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2020-05-15
Anticipated expiration: 2040-02-24
Also published as: CN111150241B

Abstract

The invention discloses a dual-purpose desk for desk and dressing table, which relates to the field of desks, wherein a first transmission cavity is arranged in a main body, first screw rods are rotatably arranged on the front end wall and the rear end wall of the first transmission cavity, a first belt pulley is fixedly arranged on the first screw rod, a first sliding block is arranged on the first belt pulley in a threaded fit manner, a sliding groove communicated with the left and the right is arranged in the first sliding block, a first sliding groove is arranged on the upper end wall of the first sliding block, a second sliding block is arranged in the sliding groove in a sliding manner, a third sliding block which is matched with the first sliding groove and extends upwards is fixedly arranged at the upper end of the second sliding block, when a desktop or a dressing table is needed, the desktop and the dressing table are controlled to descend firstly through a motor, the front and back exchange positions are then ascended to the use height, a mirror and a white board are arranged at, the white board faces forward when the desk is used.

Description

Dual-purpose desk of desk dressing table

Technical Field

The invention relates to the technical field of tables, in particular to a dual-purpose table for a desk and a dressing table.

Background

The table is a common furniture, the upper part of the table is provided with a plane, the lower part of the table is provided with a pillar, the table can be used for placing articles, doing things, eating, writing, working and the like on the table, the table is a furniture fixed by smooth plates, legs and other supports, the table can also be used as a noun in Chinese, and the table is rich and various in types in order to meet the requirements of the public. The tables can be divided into a plurality of categories according to requirements, such as office tables, dining tables, desks, computer tables, teacher tables and the like, and at present, many people need desks and dressing tables at home, but because the two desks occupy large area, many small houses cannot meet the requirement of having two desks at the same time, which causes great inconvenience for people.

Disclosure of Invention

Aiming at the technical defects, the invention provides a dual-purpose desk for a desk and a dressing table, which can overcome the defects.

The invention relates to a desk and dressing table dual-purpose desk, which comprises a main body, wherein a first transmission cavity is arranged in the main body, a first screw rod is rotatably arranged on the front end wall and the rear end wall of the first transmission cavity, a first belt pulley is fixedly arranged on the first screw rod, a first sliding block is arranged on the first belt pulley in a threaded fit manner, a sliding groove communicated from left to right is arranged in the first sliding block, a first sliding groove is arranged on the upper end wall of the first sliding block, a second sliding block is arranged in the sliding groove in a sliding manner, a third sliding block extending upwards and matched with the first sliding groove is fixedly arranged at the upper end of the second sliding block, the same first limiting block comprising a limiting groove matched with the first sliding groove is fixedly arranged on the front end wall and the rear end wall of the first transmission cavity, a first rotating shaft extending towards the left side and the right side is rotatably arranged on the second sliding block, and a first gear, first transmission chamber lower extreme wall fixed mounting has and is located the left fixed block of first screw rod, be equipped with on the fixed block can with first gear engagement's rack, first transmission chamber right side be equipped with first axis of rotation fixed connection's mirror, white version, mirror, white version downside are equipped with desktop, vanity cabinet, the desktop left side is equipped with left slip subassembly, the vanity cabinet right side is equipped with right slip subassembly, desktop, vanity cabinet rear side are equipped with transmission assembly.

Preferably, the left sliding assembly comprises a left sliding cavity positioned on the left side of the tabletop, a second screw rod is rotatably installed on the front end wall of the left sliding cavity, a third sliding block is arranged on the second screw rod in a threaded fit manner, a third screw rod is rotatably installed on the upper end wall of the third sliding block, a first bevel gear is fixedly installed on the third screw rod, a second limiting block positioned on the upper side of the first bevel gear is installed on the third screw rod through a bearing, a first fixing block positioned on the upper side of the second limiting block and fixedly connected with the left end of the tabletop at the right end is arranged on the third screw rod in a threaded fit manner, a third limiting block is installed on the second screw rod through a bearing, a second transmission cavity communicated with the right sliding cavity is arranged on the rear side of the left sliding cavity, a second rotating shaft is rotatably installed on the rear end wall of the second transmission cavity, and the front end of the second rotating shaft is connected with a third, and a second bevel gear meshed with the first bevel gear is fixedly mounted at the front end of the third rotating shaft.

Preferably, the right sliding assembly comprises a right sliding cavity positioned at the right side of the cosmetic cabinet, a fourth screw is rotatably mounted on the front end wall of the right sliding cavity, a fourth sliding block is arranged on the fourth screw rod in a threaded fit manner, a fifth screw rod is rotatably arranged on the upper end wall of the fourth sliding block, a third bevel gear is fixedly arranged on the fifth screw rod, a fourth limiting block positioned on the upper side of the third bevel gear is arranged on the fifth screw rod through a bearing, a second fixed block which is arranged at the upper side of the fourth limiting block and the left end of which is fixedly connected with the right end of the dressing case is arranged on the fifth screw rod in a threaded fit manner, a fifth limiting block is arranged on the fourth screw rod through a bearing, a fourth rotating shaft is rotatably arranged on the rear end wall of the second transmission cavity, the front end of the fourth rotating shaft is connected with a fifth rotating shaft through a second spline, and a fourth bevel gear meshed with the third bevel gear is fixedly mounted at the front end of the fifth rotating shaft.

Preferably, the transmission assembly includes fixed mounting and is in the motor of second transmission chamber rear end wall, motor front end power connection has the drive shaft, the drive shaft front end has sixth axis of rotation through third splined connection, front side fixed mounting has the second gear, second transmission chamber left side is equipped with the second sliding tray, slide in the second sliding tray be equipped with the right side with the fifth sliding block that the sixth axis of rotation passes through the bearing and is connected, second sliding tray front end is equipped with the electro-magnet, the fifth sliding block left end be equipped with electro-magnet complex iron plate, the fifth sliding block right-hand member with second sliding tray right-hand member wall passes through spring coupling, second transmission chamber upside be equipped with the intercommunication chamber of first transmission chamber intercommunication, in the second axis of rotation from the past backward in proper order fixed mounting have first belt pulley, can with second gear meshing's third gear and with the second belt pulley that first belt pulley passes through the second belt connection ,

preferably, the transmission assembly further comprises a third belt pulley fixedly mounted on the fourth rotating shaft and connected with the first belt pulley through a first belt, a seventh rotating shaft is rotatably mounted on the rear end wall of the second transmission cavity, a fourth gear, a fourth belt pulley and a fifth gear meshed with the second gear are sequentially and fixedly mounted on the seventh rotating shaft from front to back, a sixth gear meshed with the fourth gear is fixedly mounted on the rear end of the second screw, and a fifth belt pulley connected with the fourth belt pulley through a third belt is fixedly mounted on the rear end of the fourth screw.

The beneficial effects are that: the device simple structure, convenient operation, the device is when needs desktop or vanity table, accessible motor control desktop and vanity table descend earlier, rise to the use height behind the front and back exchange position, and the upside is equipped with mirror and blank simultaneously, and the mirror is forward when using the vanity table, and the blank is forward when using the desk, and area is little, makes things convenient for people to use.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a right side view of the embodiment of the present invention FIG. 1;

FIG. 3 is a top view of the embodiment of the present invention FIG. 1;

FIG. 4 is a schematic view of A-A in FIG. 2 according to an embodiment of the present invention.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

The invention will now be described in detail with reference to fig. 1-4, for convenience of description, the following orientations will now be defined: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention discloses a desk and dressing table dual-purpose desk, which comprises a main body 10, wherein a first transmission cavity 29 is arranged in the main body 10, first screw rods 24 are rotatably arranged on the front end wall and the rear end wall of the first transmission cavity 29, a first belt pulley 62 is fixedly arranged on the first screw rods 24, first sliding blocks 25 are arranged on the first belt pulley 62 in a threaded fit manner, sliding grooves communicated with the left side and the right side are arranged in the first sliding blocks 25, first sliding grooves 27 are arranged on the upper end wall of the first sliding blocks 25, second sliding blocks 28 are arranged in the sliding grooves in a sliding manner, third sliding blocks 26 extending upwards and matched with the first sliding grooves 27 are fixedly arranged on the upper ends of the second sliding blocks 28, first limiting blocks 64 which are identical and comprise limiting grooves 66 matched with the first sliding grooves 27 are fixedly arranged on the front end wall and the rear end wall of the first transmission cavity 29, first rotating shafts 31 extending towards the left side and the right side are rotatably arranged on the second sliding blocks, first 31 left ends fixed mounting of rotation axis has first gear 30, end wall fixed mounting has to be located under first transmission chamber 29 the left fixed block 67 of first screw rod 24, be equipped with on the fixed block 67 can with the rack 32 of first gear 30 meshing, first transmission chamber 29 right side be equipped with 31 fixed connection's of first rotation axis mirror 23, white version 65, mirror 23, white version 65 downside are equipped with desktop 17, dressing table 16, desktop 17 left side is equipped with left side sliding assembly, dressing table 16 right side is equipped with right side sliding assembly, desktop 17, dressing table 16 rear side are equipped with transmission assembly.

Beneficially, the left sliding assembly includes a left sliding cavity 13 located on the left side of the table top 17, a second screw 15 is rotatably mounted on the front end wall of the left sliding cavity 13, a third sliding block 14 is disposed on the second screw 15 through a screw fit, a third screw 12 is rotatably mounted on the upper end wall of the third sliding block 14, a first bevel gear 34 is fixedly mounted on the third screw 12, a second limiting block 33 located on the upper side of the first bevel gear 34 is mounted on the third screw 12 through a bearing, a first fixing block 11 located on the upper side of the second limiting block 33 and fixedly connected with the left end of the table top 17 at the right end is disposed on the third screw 12 through a screw fit, a third limiting block 39 is mounted on the second screw 15 through a bearing, a second transmission cavity 68 communicated with the right sliding cavity 21 is disposed on the rear side of the left sliding cavity 13, and a second rotating shaft 46 is rotatably mounted on the rear end wall of the second transmission cavity 68, the front end of the second rotating shaft 46 is connected with a third rotating shaft 37 through a first spline 44, and a second bevel gear 38 engaged with the first bevel gear 34 is fixedly mounted at the front end of the third rotating shaft 37.

Beneficially, the right sliding assembly includes a right sliding cavity 21 located at the right side of the cosmetic cabinet 16, a fourth screw 18 is rotatably mounted on the front end wall of the right sliding cavity 21, a fourth sliding block 19 is disposed on the fourth screw 18 through a screw-thread fit, a fifth screw 20 is rotatably mounted on the upper end wall of the fourth sliding block 19, a third bevel gear 36 is fixedly mounted on the fifth screw 20, a fourth limiting block 35 located at the upper side of the third bevel gear 36 is mounted on the fifth screw 20 through a bearing, a second fixing block 22 located at the upper side of the fourth limiting block 35 and fixedly connected with the right end of the cosmetic cabinet 16 at the left end is disposed on the fifth screw 20 through a screw-thread fit, a fifth limiting block 41 is mounted on the fourth screw 18 through a bearing, a fourth rotating shaft 45 is rotatably mounted on the rear end wall of the second transmission cavity 68, and a fifth rotating shaft 42 is connected to the front end of the fourth rotating shaft 45 through a second spline 43, a fourth bevel gear 40 meshed with the third bevel gear 36 is fixedly mounted at the front end of the fifth rotating shaft 42.

Beneficially, the transmission assembly includes a motor 56 fixedly installed on the rear end wall of the second transmission cavity 68, a driving shaft 55 is dynamically connected to the front end of the motor 56, a sixth rotating shaft 69 is connected to the front end of the driving shaft 55 through a third spline 70, a second gear 57 is fixedly installed on the front side of the second transmission cavity 79, a second sliding groove 74 is arranged on the left side of the second transmission cavity 68, a fifth sliding block 71 with the right side connected to the sixth rotating shaft 69 through a bearing is slidably arranged in the second sliding groove 74, an electromagnet 75 is arranged on the front end of the second sliding groove 74, an iron block 73 matched with the electromagnet 75 is arranged on the left end of the fifth sliding block 71, the right end of the fifth sliding block 71 is connected to the right end wall of the second sliding groove 74 through a spring 72, a communicating cavity 61 communicated with the first transmission cavity 29 is arranged on the upper side of the second transmission cavity 68, and a first belt pulley 77 is fixedly installed on the second rotating shaft 46 from the front to, A third gear 59 engageable with the second gear 57, and a second pulley 58 connected to the first pulley 62 via a second belt 60.

Advantageously, the transmission assembly further comprises a third belt pulley 50 fixedly mounted on the fourth rotating shaft 45 and connected to the first belt pulley 77 through a first belt 51, the rear end wall of the second transmission cavity 68 is rotatably mounted with a seventh rotating shaft 54, the seventh rotating shaft 54 is fixedly mounted with a fourth gear 47, a fourth belt pulley 76 and a fifth gear 52 capable of meshing with the second gear 57 in sequence from front to rear, the rear end of the second screw 15 is fixedly mounted with a sixth gear 53 meshing with the fourth gear 47, and the rear end of the fourth screw 18 is fixedly mounted with a fifth belt pulley 48 connected to the fourth belt pulley 76 through a third belt 49.

In the initial state, the table top 17 is at the front side, the cosmetic cabinet 16 is at the rear side, the first sliding block 25 is located at the rearmost side of the first screw 24, the electromagnet 75 is not energized, the spring 72 is in the normal tension state, the second gear 57 is engaged with the third gear 59, the third sliding block 26 is located at the rightmost end of the first sliding groove 27, the mirror 23 faces forward, and the white plate 65 faces backward, the first gear 30 can be engaged with the rack 32.

When the cosmetic cabinet is needed, the motor 56 is started to rotate forward to drive the driving shaft 55 to rotate, thereby driving the sixth rotating shaft 69 to rotate, thereby driving the second gear 57 to rotate, thereby driving the third gear 59 to rotate, thereby driving the second rotating shaft 46 to rotate, thereby driving the first belt pulley 77 to rotate, thereby driving the third belt pulley 50 to rotate, thereby driving the fourth rotating shaft 45 to rotate, thereby driving the third rotating shaft 37, the fifth rotating shaft 42 to rotate, thereby driving the first fixing block 11, the rack 32 to slide downward, thereby driving the tabletop 17, the cosmetic cabinet 16 to slide downward, while the second rotating shaft 46 drives the second belt pulley 58 to rotate, thereby driving the first belt pulley 62 to rotate, thereby driving the first sliding block 25 to slide forward, thereby driving the first screw 24 to rotate, when the first gear 30 is engaged with the rack 32, driving the first rotating shaft 31 to rotate for half a revolution, so that the white plate 65 faces forward, the mirror 23 faces backward, when the third sliding block 26 is engaged with the front end limit slot 66, the second sliding block 28, the first rotating shaft 31, the third sliding block 26 and the first gear 30 slide leftward, the first gear 30 is not engaged with the rack 32, when the first fixed block 11 and the second fixed block 22 slide to the lowest end, the motor 56 is stopped, the electromagnet 75 is energized to attract the iron block 73, so as to drive the fifth sliding block 71 to slide forward, the spring 72 is stretched, so as to drive the sixth rotating shaft 69 and the second gear 57 to slide forward, the second gear 57 is engaged with the fifth gear 52, the motor 56 is started to rotate forward, so as to drive the driving shaft 55 to rotate, so as to drive the sixth rotating shaft 69 to rotate, so as to drive the second gear 57 to rotate, so as to drive the fifth gear 52 to rotate, so as to drive the seventh rotating shaft 54 to rotate, so as to drive the fourth gear 47 and the fourth belt pulley, thereby rotating the sixth gear 53 and the fifth belt pulley 48, thereby rotating the second screw 15 and the fourth screw 18, thereby sliding the third slide block 14 backward, sliding the fourth slide block 19 forward, when the third slide block 14 slides to the rearmost side and the fourth slide block 19 slides to the foremost side, the motor 56 is stopped, the electromagnet 75 is de-energized, the fifth slide block 71, the sixth rotating shaft 69 and the second gear 57 slide backward due to the spring 72, the second gear 57 is engaged with the third gear 59, the motor 56 is started to rotate in reverse, thereby rotating the driving shaft 55, thereby rotating the sixth rotating shaft 69, thereby rotating the second gear 57, thereby rotating the third gear 59, thereby rotating the second rotating shaft 46, thereby rotating the first belt pulley 77, thereby rotating the third belt pulley 50, thereby rotating the fourth rotating shaft 45, thereby rotating the third rotating shaft 37, The fifth rotating shaft 42 rotates to drive the first fixing block 11 and the rack 32 to slide upwards, so as to drive the tabletop 17 and the cosmetic cabinet 16 to slide upwards, meanwhile, the second rotating shaft 46 drives the second belt pulley 58 to rotate, so as to drive the first belt pulley 62 to rotate, so as to drive the first sliding block 25 to slide backwards, when the third sliding block 26 is matched with the rear limiting groove 66, the second sliding block 28, the first rotating shaft 31, the third sliding block 26 and the first gear 30 slide rightwards, and the first gear 30 can be meshed with the rack 32;

when the desk top is needed, the motor 56 is started to rotate forward to drive the driving shaft 55 to rotate, thereby driving the sixth rotating shaft 69 to rotate, thereby driving the second gear 57 to rotate, thereby driving the third gear 59 to rotate, thereby driving the second rotating shaft 46 to rotate, thereby driving the first belt pulley 77 to rotate, thereby driving the third belt pulley 50 to rotate, thereby driving the fourth rotating shaft 45 to rotate, thereby driving the third rotating shaft 37 and the fifth rotating shaft 42 to rotate, thereby driving the first fixing block 11 and the rack 32 to slide downwards, thereby driving the desk top 17 and the cosmetic cabinet 16 to slide downwards, while the second rotating shaft 46 drives the second belt pulley 58 to rotate, thereby driving the first belt pulley 62 to rotate, thereby driving the first sliding block 25 to slide forwards, thereby driving the first screw 24 to rotate, and driving the first rotating shaft 31 to rotate for half a revolution when the first gear 30 is meshed with the rack 32, so that the white plate 65 faces backwards, the mirror 23 faces forwards, when the third sliding block 26 is matched with the front end limit groove 66, the second sliding block 28, the first rotating shaft 31, the third sliding block 26 and the first gear 30 slide leftwards, the first gear 30 is not meshed with the rack 32, when the first fixed block 11 and the second fixed block 22 slide to the lowest end, the motor 56 is stopped, the electromagnet 75 is electrified to attract the iron block 73, so as to drive the fifth sliding block 71 to slide forwards, the spring 72 is stretched, so as to drive the sixth rotating shaft 69 and the second gear 57 to slide forwards, the second gear 57 is meshed with the fifth gear 52, the motor 56 is started to rotate reversely, so as to drive the driving shaft 55 to rotate, so as to drive the sixth rotating shaft 69 to rotate, so as to drive the second gear 57 to rotate, so as to drive the fifth gear 52 to rotate, so as to drive the seventh rotating shaft 54 to rotate, so as to drive the fourth gear 47 and the fourth belt, thereby rotating the sixth gear 53 and the fifth belt pulley 48, thereby rotating the second screw 15 and the fourth screw 18, thereby sliding the third slide block 14 forward, sliding the fourth slide block 19 backward, when the third slide block 14 slides to the foremost side and the fourth slide block 19 slides to the rearmost side, the motor 56 is stopped, the electromagnet 75 is de-energized, the fifth slide block 71, the sixth rotating shaft 69 and the second gear 57 slide backward due to the spring 72, the second gear 57 is engaged with the third gear 59, the motor 56 is started to rotate in reverse, thereby rotating the driving shaft 55, thereby rotating the sixth rotating shaft 69, thereby rotating the second gear 57, thereby rotating the third gear 59, thereby rotating the second rotating shaft 46, thereby rotating the first belt pulley 77, thereby rotating the third belt pulley 50, thereby rotating the fourth rotating shaft 45, thereby rotating the third rotating shaft 37, Fifth axis of rotation 42 rotates to drive first fixed block 11, rack 32 upwards slides, thereby drive desktop 17, the upwards slides of makeup cabinet 16, second axis of rotation 46 drives second belt pulley 58 simultaneously and rotates, thereby drives first belt pulley 62 and rotates, thereby drives first sliding block 25 and slides backward, second sliding block 28 when the cooperation of third slip 26 and rear side spacing groove 66, first axis of rotation 31, the cooperation of third slip 26, first gear 30 slides right, first gear 30 can mesh with rack 32.

The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.

Claims

1. A desk and dressing table dual-purpose desk comprises a main body, wherein a first transmission cavity is arranged in the main body, a first screw rod is installed on the front end wall and the rear end wall of the first transmission cavity in a rotating mode, a first belt pulley is fixedly installed on the first screw rod, a first sliding block is arranged on the first belt pulley in a threaded fit mode, a left sliding groove and a right sliding groove are communicated and arranged in the first sliding block, a first sliding groove is arranged on the upper end wall of the first sliding block, a second sliding block is arranged in the sliding groove in a sliding mode, a third sliding block which is matched with the first sliding groove and extends upwards is fixedly installed at the upper end of the second sliding block, a first limiting block which is matched with the first sliding groove and is arranged on the front end wall and the rear end wall of the first transmission cavity is fixedly installed with a same first limiting block comprising a limiting groove matched with the first sliding groove, a first rotating shaft which, first transmission chamber lower extreme wall fixed mounting has and is located the left fixed block of first screw rod, be equipped with on the fixed block can with first gear engagement's rack, first transmission chamber right side be equipped with first axis of rotation fixed connection's mirror, white version, mirror, white version downside are equipped with desktop, vanity cabinet, the desktop left side is equipped with left slip subassembly, the vanity cabinet right side is equipped with right slip subassembly, desktop, vanity cabinet rear side are equipped with transmission assembly.

2. The dual-purpose desk as set forth in claim 1, wherein: the left sliding assembly comprises a left sliding cavity positioned on the left side of the desktop, a second screw rod is rotatably arranged on the front end wall of the left sliding cavity, a third sliding block is arranged on the second screw rod in a threaded fit manner, a third screw rod is rotatably arranged on the upper end wall of the third sliding block, a first bevel gear is fixedly arranged on the third screw rod, a second limiting block positioned on the upper side of the first bevel gear is arranged on the third screw rod through a bearing, a first fixing block positioned on the upper side of the second limiting block and fixedly connected with the left end of the desktop at the right end is arranged on the third screw rod in a threaded fit manner, a third limiting block is arranged on the second screw rod through a bearing, a second transmission cavity communicated with the right sliding cavity is arranged on the rear side of the left sliding cavity, a second rotating shaft is rotatably arranged on the rear end wall of the second transmission cavity, and the front end of the second rotating shaft is connected with a, and a second bevel gear meshed with the first bevel gear is fixedly mounted at the front end of the third rotating shaft.

3. The dual-purpose desk as set forth in claim 2, wherein: the right sliding component comprises a right sliding cavity positioned on the right side of the cosmetic cabinet, a fourth screw rod is rotatably arranged on the front end wall of the right sliding cavity, a fourth sliding block is arranged on the fourth screw rod in a threaded fit manner, a fifth screw rod is rotatably arranged on the upper end wall of the fourth sliding block, a third bevel gear is fixedly arranged on the fifth screw rod, a fourth limiting block positioned on the upper side of the third bevel gear is arranged on the fifth screw rod through a bearing, a second fixed block which is arranged at the upper side of the fourth limiting block and the left end of which is fixedly connected with the right end of the dressing case is arranged on the fifth screw rod in a threaded fit manner, a fifth limiting block is arranged on the fourth screw rod through a bearing, a fourth rotating shaft is rotatably arranged on the rear end wall of the second transmission cavity, the front end of the fourth rotating shaft is connected with a fifth rotating shaft through a second spline, and a fourth bevel gear meshed with the third bevel gear is fixedly mounted at the front end of the fifth rotating shaft.

4. The dual-purpose desk as set forth in claim 3, wherein: the transmission assembly comprises a motor fixedly arranged on the rear end wall of the second transmission cavity, the front end of the motor is in power connection with a driving shaft, the front end of the driving shaft is connected with a sixth rotating shaft through a third spline, a second gear is fixedly arranged on the front side, a second sliding groove is arranged at the left side of the second transmission cavity, a fifth sliding block with the right side connected with the sixth rotating shaft through a bearing is arranged in the second sliding groove in a sliding manner, the front end of the second sliding groove is provided with an electromagnet, the left end of the fifth sliding block is provided with an iron block matched with the electromagnet, the right end of the fifth sliding block is connected with the right end wall of the second sliding groove through a spring, a communicating cavity communicated with the first transmission cavity is arranged on the upper side of the second transmission cavity, the second rotating shaft is sequentially and fixedly provided with a first belt pulley, a third gear meshed with the second gear and a second belt pulley connected with the first belt pulley through a second belt.

5. The dual-purpose desk as set forth in claim 4, wherein: the transmission assembly further comprises a third belt pulley which is fixedly arranged on the fourth rotating shaft and connected with the first belt pulley through a first belt, a seventh rotating shaft is installed on the rear end wall of the second transmission cavity in a rotating mode, a fourth gear, a fourth belt pulley and a fifth gear meshed with the second gear are fixedly arranged on the seventh rotating shaft from front to back in sequence, the second screw is fixedly arranged at the rear end of the second screw, the sixth gear meshed with the fourth gear is fixedly arranged on the rear end of the fourth screw, and the fourth belt pulley is fixedly arranged on the rear end of the fourth screw and connected with the fourth belt pulley through a third belt.