CN112754139A

CN112754139A - Office table capable of being high or low

Info

Publication number: CN112754139A
Application number: CN202110044645.5A
Authority: CN
Inventors: 丁国辉
Original assignee: Jiangxi Jingda Metal Equipment Co ltd
Current assignee: Jiangxi Jingda Metal Equipment Co ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-05-07
Anticipated expiration: 2041-01-13
Also published as: CN112754139B

Abstract

The invention relates to a height-adjustable office table which comprises a table body, a movable table, a ceramic guide sleeve, a slide rod, a piston cylinder, a driving mechanism and an air guide mechanism, wherein the movable table is sleeved on the outer side of the table body in a sliding manner, and the piston cylinder is fixedly connected to the circumferential direction of one side in the table body at intervals. The movable table is driven to move downwards for adjustment by pressing the air guide mechanism to deflate when the movable table needs to move downwards, so that people with different heights can work.

Description

Office table capable of being high or low

Technical Field

The invention relates to an office table, in particular to an office table with a height adjustable function.

Background

Among the daily life, some people need do official business, and the official working then needs use the desk, just can make better doing official working of people, provides the office efficiency, and at present, when people worked a official business through the desk, because the height of desk is all fixed, lead to the people of height difference can not carry out convenient official working, influence office efficiency.

Therefore, it is necessary to design and develop a desk which can adjust the height, facilitate the work of people, and has no influence on the work efficiency and can be high or low.

Disclosure of Invention

In order to overcome because the height of desk is all fixed, lead to the people of height difference can not carry out convenient official working, influence the shortcoming of office efficiency, the technical problem who solves: the utility model provides a can adjust the height, make things convenient for people to official working, do not influence the desk that can height of office efficiency can hang down.

The technical scheme is as follows: the utility model provides a desk that can be high can be low, including the table body, movable table, ceramic guide pin bushing, slide bar, piston cylinder, actuating mechanism and air guide mechanism, the cover of the external side slidingtype of table has movable table, and piston cylinder interval rigid coupling is in the internal one side circumference of table, and ceramic guide pin bushing interval fixed cross-under is in table one side circumference, and it corresponds with piston cylinder, and the cross-under of slide bar slidingtype is in ceramic guide pin bushing, and its one end is located piston cylinder, slide bar and piston cylinder sliding fit, and slide bar one end and the internal one side fixed connection of movable table, and actuating mechanism installs on the table body, and air guide mechanism installs on the table body, its and actuating mechanism fixed connection, and air guide mechanism still with piston cylinder fixed connection.

Actuating mechanism is including footboard, the cylinder body, the movable rod, one-way intake pipe, the piston board, first spring and one-way exhaust tube, the cylinder body rigid coupling is between the external both sides of table, place in the cylinder body of piston board slidingtype, first spring interval is connected between one side of piston board and one side in the cylinder body, its quantity is three, the wearing of movable rod interval slidingtype connects in cylinder body one side, its quantity is three, and movable rod one end and piston board one side fixed connection, one-way exhaust tube interval is connected in cylinder body one side and intercommunication, its quantity is three, one-way intake pipe tail end and air guide mechanism fixed connection, the connection of footboard rotary type is between the external both sides of table, it cooperates with movable rod one end.

The air guide mechanism comprises a u-shaped pipe, a pipeline, a cross-shaped plugging block and a second spring, the u-shaped pipe is fixedly connected between two sides of the table body in a penetrating mode, one side of the u-shaped pipe is fixedly connected and communicated with the tail end of the one-way air inlet pipe, the pipeline is fixedly connected to one side of the piston cylinder and communicated with the piston cylinder, the tail end of the pipeline penetrates through the table body and is fixedly connected and communicated with one side of the u-shaped pipe, the cross-shaped plugging block is slidably connected to the middle of one side of the u-shaped pipe in a.

Preferably, the table also comprises a fixing mechanism, the fixing mechanism comprises a T-shaped rod, a connecting rod, a rotating shaft, a wire guide wheel, a pull wire, a third spring, a clamping block, a frame body, a movable oblique block, a fourth spring, a net frame and a fixed block, the net frame is fixedly connected to one side outside the u-shaped tube, the cross-shaped block is positioned in the net frame, the T-shaped rod is slidably placed between two sides outside the table body, one end of the T-shaped rod is positioned in the net frame, the T-shaped rod is matched with the cross-shaped block, the connecting rod is symmetrically and fixedly connected to one side of the T-shaped rod, the frame body is fixedly connected to one side of the movable table at intervals in the circumferential direction, the tail end of the frame body penetrates through one side of the table body, the fixed block is fixedly connected to one side of the frame body at intervals, the movable oblique block is slidably sleeved on the fixed block, the fourth spring is symmetrically connected between one side of, the wire guide wheel is in contact fit with the movable oblique block, the third spring is symmetrically connected between one side of the clamping block and one side of the sliding groove, the rotating shaft is symmetrically connected to two sides in the table body, the wire guide wheel is fixedly sleeved on the rotating shaft, the pull wires are fixedly connected to one side of the connecting rods, the number of the pull wires on each connecting rod is two, and the tail ends of the pull wires are fixedly connected with one side of the clamping block by bypassing the wire guide wheel.

Preferably, the table further comprises a buffer mechanism, the buffer mechanism comprises a contact rod, a sleeve, a friction block, a fifth spring, a spiral groove shaft, a cam, a scroll spring and a contact frame, the sliding type of the contact rod is symmetrically connected to one side of the table body in a penetrating mode, one end of the contact rod is fixedly connected with one side of the movable table, the sliding type of the sleeve is symmetrically arranged between two sides of the table body, the friction block is arranged in the sleeve in a sliding mode, one end of the friction block is in contact fit with the contact rod, the fifth spring is connected between one end of the friction block and one side of the sleeve in a penetrating mode, the spiral groove shaft is rotatably connected between two sides of the middle of the table body, the cam is fixedly sleeved on the spiral groove shaft and is in contact fit with the inner end of the sleeve, the scroll spring is connected between one side of the cam and one side of the table body, the.

Preferably, the table further comprises a damping ring and a sixth spring, the damping ring is slidably sleeved on the sliding rod and is in contact fit with the movable table, and the sixth spring is connected between one side of the damping ring and one side outside the table body and is sleeved on the sliding rod.

Preferably, the air-conditioning cylinder further comprises a strong magnet, a clip iron block and a filter frame, wherein the strong magnet is fixedly connected to the middle part of the outer side of the cylinder body, the clip iron block is sleeved on the strong magnet in a sliding mode, the filter frame is fixedly connected to the outer side of the clip iron block, and the one-way exhaust pipe is located in the filter frame.

Preferably, the outer end of the friction block is made of rubber.

The invention has the beneficial effects that:

1. the air guide mechanism is operated by stepping on the driving mechanism to drive the air guide mechanism to operate, the air guide mechanism operates to discharge air into the piston cylinder, the air drives the sliding rod to move upwards, the sliding rod drives the movable table to move upwards to adjust the height, and when the movable table needs to move downwards, the air guide mechanism is pressed to operate to deflate, so that the movable table can move downwards to adjust, and therefore, people with different heights can work.

2. Through fixed establishment's effect, can support fixedly to the activity table, so, can make the activity table more firm and do not influence people's official working.

3. Through the effect of buffer gear, can make the slow downward removal of activity table, so, can avoid the too fast position that surpasss the demand of the speed that the activity table moved down.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

FIG. 2 is a schematic view of a first partial body structure according to the present invention.

Fig. 3 is an enlarged schematic view of part a of the present invention.

Fig. 4 is an enlarged view of part B of the present invention.

FIG. 5 is a schematic view of a second partial body structure according to the present invention.

Fig. 6 is an enlarged schematic view of part C of the present invention.

Reference numerals: 1_ table body, 2_ movable table, 3_ ceramic guide sleeve, 4_ slide bar, 5_ piston cylinder, 6_ driving mechanism, 61_ pedal, 62_ cylinder, 63_ movable bar, 64_ one-way air inlet pipe, 65_ piston plate, 66_ first spring, 67_ one-way air exhaust pipe, 7_ air guide mechanism, 71_ u type pipe, 72_ pipe, 73_ cross block, 74_ second spring, 8_ fixed mechanism, 81_ T type bar, 82_ connecting bar, 83_ rotating shaft, 84_ guide wheel, 85_ pull wire, 86_ chute, 87_ third spring, 88_ latch, 89_ frame body, 810_ movable ramp, 811_ fourth spring, 812_ net frame, 813_ fixed block, 9_ buffer mechanism, 91_ contact bar, 92_ sleeve, 93_ friction block, 94_ fifth spring, 95_ helical grooved shaft, 96_ cam, 97_ spring, 98_ contact frame, 10_ shock absorbing ring, 11_ sixth spring, 12_ strong magnet, 13_ clip iron block, 14_ filter box.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

Example (b): an office table capable of being high and low.

As shown in fig. 1, 2, 3, 5 and 6, the table comprises a table body 1, a movable table 2, a ceramic guide sleeve 3, a slide rod 4, a piston cylinder 5, a driving mechanism 6 and an air guide mechanism 7, wherein the movable table 2 is sleeved on the upper portion of the table body 1 in a sliding manner, four piston cylinders 5 are fixedly connected to the inner top of the table body 1 at uniform intervals in the circumferential direction, the slide rod 4 is arranged in the piston cylinder 5 in a sliding manner, the ceramic guide sleeve 3 is fixedly connected to the inner top of the table body 1 at uniform intervals in the circumferential direction, the ceramic guide sleeve 3 corresponds to the piston cylinder 5, the top end of the slide rod 4 penetrates through the ceramic guide sleeve 3 to be fixedly connected with the inner top of the movable table 2, the slide rod 4 is in sliding fit with the ceramic guide sleeve 3, the driving mechanism 6 is arranged between two sides of the table body 1, the air guide mechanism 7 is arranged on the table body 1 and.

The driving mechanism 6 comprises a pedal 61, a cylinder 62 and a movable rod 63, one-way intake pipe 64, piston plate 65, first spring 66 and one-way exhaust tube 67, the rigid coupling has cylinder body 62 between the left and right sides rear portion downside in the table body 1, the evenly spaced three one-way intake pipes 64 that are connected with of cylinder body 62 rear side lower part communicates, one-way intake pipe 64 tail end and air guide mechanism 7 fixed connection, the evenly spaced three one-way exhaust tube 67 that are connected with of cylinder body 62 front side lower part communicates, the sliding type is equipped with piston plate 65 in the cylinder body 62, evenly spaced three first spring 66 that are connected with between piston plate 65 bottom and the cylinder body 62 bottom, the even spaced slidingtype cross-under in cylinder body 62 top has three movable rod 63, movable rod 63 bottom and piston plate 65 top fixed connection, the rotary type is connected with footboard 61 between the left and right sides lower part rear side in the table body 1 outside, footboard 61 and movable rod 63 top contact cooperation.

The air guide mechanism 7 comprises a u-shaped pipe 71, a pipeline 72, a cross-shaped block 73 and a second spring 74, the u-shaped pipe 71 is fixedly connected between the left side and the right side of the lower portion of the table body 1 in a penetrating mode, the middle of the rear portion of the u-shaped pipe 71 is fixedly connected and communicated with the tail end of the one-way air inlet pipe 64, the cross-shaped block 73 is connected in a sliding mode in the middle of the rear side of the top of the u-shaped pipe 71 in a penetrating mode, the second spring 74 is connected between the bottom end of the cross-shaped block 73 and the inside of the u-shaped pipe 71, the pipeline 72 is fixedly connected and communicated with the middle.

Firstly, an operator steps on a driving mechanism 6 according to requirements, the driving mechanism 6 operates to drive an air guide mechanism 7 to operate, the air guide mechanism 7 operates to discharge air into a piston cylinder 5, the air is discharged into the piston cylinder 5 to drive a slide rod 4 to move upwards, the slide rod 4 moves upwards to drive a movable table 2 to move upwards, when the movable table 2 moves upwards to a height suitable for people to use, the operator can work on the movable table 2 by stopping stepping on the driving mechanism 6, when the height of the movable table 2 needs to be reduced downwards, the air guide mechanism 7 is pushed to operate, the air guide mechanism 7 operates to discharge the air in the piston cylinder 5, along with the discharge of the air, the slide rod 4 moves downwards to drive the movable table 2 to move downwards due to the action of gravity, when the movable table 2 moves downwards to the required height, the air guide mechanism 7 is released to reset, and the air guide mechanism 7 resets to stop the discharge of the air in the, so, can adjust the height of activity table 2 as required, make things convenient for people to official working.

Firstly, an operator steps on the pedal 61 to swing downwards, the pedal 61 swings downwards to drive the movable rod 63 to move downwards, the movable rod 63 moves downwards to drive the piston plate 65 to move downwards, the first spring 66 is compressed, the piston plate 65 moves downwards to push air in the cylinder body 62 into the air guide mechanism 7 through the one-way air inlet pipe 64, the air guide mechanism 7 discharges air into the piston cylinder 5, the slide rod 4 drives the movable table 2 to move upwards, then the pedal 61 is released, the piston plate 65 moves upwards to suck air into the cylinder body 62 through the one-way air suction pipe 67 under the action of the first spring 66, the piston plate 65 drives the pedal 61 to swing upwards through the movable rod 63 to reset, and the pedal 61 is repeatedly and continuously stepped on, the movable table 2 can continuously move upwards, and when the movable table 2 moves upwards to the required height, the pedal 61 stops being stepped on, so that people can work on the movable table 2.

When an operator steps on the pedal 61, the piston plate 65 moves downwards to push the air in the cylinder 62 into the u-shaped pipe 71 through the one-way air inlet pipe 64, the air in the u-shaped pipe 71 is discharged into the pipeline 72, the air in the pipeline 72 is discharged into the piston cylinder 5, the slide rod 4 drives the movable table 2 to move upwards, when the movable table 2 moves upwards to a required height, the pedal 61 is stopped being stepped on, and the air stops being discharged into the u-shaped pipe 71. When the movable table 2 needs to be lowered, the cross-shaped blocking block 73 is pushed to move downwards, the second spring 74 is compressed, when the cross-shaped blocking block 73 moves downwards and does not block the inside of the u-shaped pipe 71, air in the u-shaped pipe 71 is continuously discharged, meanwhile, air in the piston cylinder 5 is also continuously discharged into the u-shaped pipe 71 and then discharged, along with the continuous discharge of the air in the piston cylinder 5, the sliding rod 4 drives the movable table 2 to move downwards, when the movable table 2 moves downwards to a required height, the cross-shaped blocking block 73 is loosened, and due to the action of the second spring 74, the cross-shaped blocking block 73 moves upwards and resets to block the inside of the u-shaped pipe 71, and the air stops being discharged.

Referring to fig. 2-4, the table further comprises a fixing mechanism 8, the fixing mechanism 8 comprises a T-shaped rod 81, a connecting rod 82, a rotating shaft 83, a wire guiding wheel 84, a pulling wire 85, a third spring 87, a clamping block 88, a frame 89, a movable oblique block 810, a fourth spring 811, a net frame 812 and a fixed block 813, the frame 89 is symmetrically and fixedly connected to the left side and the right side of the inner top of the movable table 2, the bottom end of the frame 89 penetrates through the upper portion of the table 1 to be in sliding fit with the upper portion of the table 1, the fixed block 813 is fixedly connected to the left side of the inner side of the left frame 89 and the right side of the inner side of the right frame 89 at even intervals, the movable oblique block 810 is slidably sleeved on the fixed block 813, the two fourth springs 811 are connected between the inner side of the movable oblique block 810 and the inner end of the fixed block 813, the sliding grooves 86 are provided with the clamping blocks 88 at, the upper portions of the front side face and the rear side face in the table body 1 are connected with a rotating shaft 83 in a left-right symmetrical rotating mode, a wire guiding wheel 84 is fixedly sleeved on the rotating shaft 83 in a fixing mode, a net frame 812 is fixedly connected to the middle of the rear side of the outer top portion of the u-shaped pipe 71, the cross-shaped blocking block 73 is located in the net frame 812, a T-shaped rod 81 is slidably arranged between the rear sides of the upper portions of the left side face and the right side face in the table body 1, the bottom end of the T-shaped rod 81 is located in the net frame 812 and is in sliding fit with the T-shaped rod, connecting rods 82 are fixedly connected to the left side and the right side of the upper portion of the front side face of the T.

The table further comprises a buffer mechanism 9, the buffer mechanism 9 comprises a contact rod 91, a sleeve 92, a friction block 93, a fifth spring 94, a spiral groove shaft 95, a cam 96, a scroll spring 97 and a contact frame 98, the sleeve 92 is symmetrically arranged between the upper top and the lower top in the table body 1 in a left-right sliding mode, the friction block 93 is arranged in the sleeve 92 in an inner sliding mode, the fifth spring 94 is connected between the inner end of the friction block 93 and one side in the sleeve 92, the contact rod 91 is symmetrically connected in a penetrating mode on the left side and the right side of the middle of the upper portion of the table body 1 in a left-right sliding mode, the top end of the contact rod 91 is fixedly connected with the top in the movable table 2, the contact rod 91 is in contact fit with the friction block 93, the spiral groove shaft 95 is rotatably connected between the middle of the upper top and the lower top in the table body 1 in a penetrating mode, the cam 96 is fixedly connected on the upper portion of the spiral groove shaft 95 in the circumferential, the middle of the upper part of the front side of the T-shaped rod 81 is fixedly connected with a contact frame 98, and the front end of the contact frame 98 is positioned in the groove of the spiral groove shaft 95 to be matched with the spiral groove shaft.

When operating personnel trampled footboard 61, activity table 2 rebound still drives framework 89 rebound, framework 89 rebound drives activity sloping block 810 rebound through fixed block 813, because of fourth spring 811's effect, activity sloping block 810 rebound is continuous to slide on fixture block 88, when activity table 2 stopped the rebound, framework 89 also stopped to drive activity sloping block 810 rebound through fixed block 813, activity sloping block 810 is fixed with framework 89 with the cooperation of fixture block 88, just also support fixedly to activity table 2. When the movable table 2 needs to be moved downwards to a proper position, the T-shaped rod 81 is pushed to move downwards, the T-shaped rod 81 moves downwards to drive the connecting rod 82 to move downwards, the connecting rod 82 moves downwards to drive the pull wire 85 to move downwards, the pull wire 85 moves downwards to drive the clamping block 88 to move inwards through the wire guide wheel 84, the third spring 87 is compressed, the clamping block 88 moves inwards to be separated from the movable inclined block 810 without limiting the movable inclined block, meanwhile, the T-shaped rod 81 moves downwards to be in contact with the cross-shaped block 73 to drive the cross-shaped block 73 to move downwards, the cross-shaped block 73 moves downwards without blocking the U-shaped pipe 71, air in the U-shaped pipe 71 and in the piston cylinder 5 is continuously discharged, the movable table 2 moves downwards to drive the frame 89 to move downwards, the frame 89 moves downwards to drive the movable inclined block 810 to move downwards through the fixing block, when the movable table 2 moves downwards to a required position, the T-shaped rod 81 is loosened, the cross-shaped block 73 moves upwards to reset and drives the T-, the T-shaped rod 81 is reset to drive the connecting rod 82 to move upwards, the pull wire 85 is loosened, the fixture block 88 moves outwards to reset and is in contact fit with the movable inclined block 810 due to the action of the third spring 87, and the fixture block 88 also drives the pull wire 85 to move to reset. Thus, the movable table 2 is more stable and does not influence the office work of people.

When the movable table 2 moves upward, the movable table 2 further drives the contact rod 91 to move upward, when the movable table 2 stops moving, the contact rod 91 also stops moving, and further when the operator pushes the T-shaped rod 81 to move downward, the T-shaped rod 81 further drives the contact frame 98 to move downward, the contact frame 98 moves downward to drive the spiral groove shaft 95 to rotate reversely, the spiral groove shaft 95 rotates reversely to drive the cam 96 to rotate reversely, the spiral spring 97 is compressed, the cam 96 rotates reversely to drive the sleeve 92 to move outward, the sleeve 92 moves outward to drive the friction block 93 to move outward, the friction block 93 moves outward to contact with the contact rod 91, the fifth spring 94 is compressed, due to the action of the fifth spring 94, the friction block 93 can closely contact with the contact rod 91, at this time, the T-shaped rod 81 stops driving the contact frame 98 to move downward, the cam 96 stops rotating reversely, the movable table 2 moves downward to drive the contact rod 91 to move downward, and as the friction block 93 closely contacts with the contact rod 91 to generate friction force, also make contact lever 91 more slowly during the lapse, contact lever 91 slowly lapse drives movable table 2 slowly lapse, when activity table 2 lapse to the height of demand, loosen T type pole 81 and reset, T type pole 81 resets and drives contact frame 98 rebound and resets, contact frame 98 resets and drives spiral groove axle 95 corotation and resets, it is spacing not to sleeve 92 also to make cam 96 corotation reset, volute spring 97 resets and makes the better reseing of spiral groove axle 95, because of the effect of fifth spring 94, sleeve 92 inwards moves and resets, and clutch blocks 93 does not contact with contact lever 91 in close contact with. In this way, the table 2 is prevented from moving down too fast to exceed the desired position.

Referring to fig. 2, 5 and 6, the table further comprises a damping ring 10 and a sixth spring 11, the sliding rod 4 is slidably sleeved with the damping ring 10, the top of the damping ring 10 is in contact fit with the inner top of the movable table 2, the sixth spring 11 is connected between the bottom of the damping ring 10 and the outer top of the table body 1, and the sixth spring 11 is sleeved on the sliding rod 4.

Initially, sixth spring 11 is the compression state, and when activity table 2 upwards moved, because of the effect of sixth spring 11, shock attenuation ring 10 upwards moved and is contacted with activity table 2 all the time, and when activity table 2 moved down, activity table 2 drove shock attenuation ring 10 and moved down, and sixth spring 11 is compressed. In this way, the movable table 2 can be further cushioned to move slowly downward.

The cylinder body 62 is characterized by further comprising a strong magnet 12, a clip-shaped iron block 13 and a filter frame 14, the strong magnet 12 is fixedly connected in the middle of the lower portion of the front side face outside the cylinder body 62, the clip-shaped iron block 13 is sleeved on the strong magnet 12, the filter frame 14 is fixedly connected to the bottom of the clip-shaped iron block 13, and the one-way air suction pipe 67 is located in the filter frame 14.

When air is continuously drawn into the cylinder 62 through the one-way suction pipe 67, the filter frame 14 filters impurities in the air, and the filtered air is drawn into the cylinder 62. After the filter frame 14 is used for a long time, the filter frame 14 is pulled to move forwards, the filter frame 14 moves forwards to drive the clip iron block 13 to move forwards, when the clip iron block 13 moves forwards to be separated from the strong magnet 12, impurities on the filter frame 14 can be removed, after all the impurities are removed, the filter frame 14 is moved to enable the clip iron block 13 to be hung back on the strong magnet 12, the strong magnet 12 sucks and fixes the clip iron block 13, and the filter frame 14 is fixed. In this way, it is avoided that the air is sucked more to block the duct 72.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A desk capable of being high or low is characterized by comprising a desk body (1), a movable desk (2), a ceramic guide sleeve (3), a sliding rod (4), a piston cylinder (5), a driving mechanism (6) and an air guide mechanism (7), wherein the movable desk (2) is sleeved on the outer side of the desk body (1) in a sliding manner, the piston cylinder (5) is fixedly connected to the circumferential direction of one side in the desk body (1) at intervals, the ceramic guide sleeve (3) is fixedly connected to the circumferential direction of one side of the desk body (1) at intervals and corresponds to the piston cylinder (5), the sliding rod (4) is connected in the ceramic guide sleeve (3) in a sliding manner, one end of the sliding rod (4) is positioned in the piston cylinder (5), the sliding rod (4) is in sliding fit with the piston cylinder (5), one end of the sliding rod (4) is fixedly connected with one side in the movable desk (2), the driving mechanism (6) is installed on the desk body (1), and the air guide mechanism (, the air guide mechanism is fixedly connected with the driving mechanism (6), and the air guide mechanism (7) is also fixedly connected with the piston cylinder (5).

2. The desk capable of being heightened or lowered according to claim 1, wherein the driving mechanism (6) comprises a pedal (61), a cylinder (62), a movable rod (63), a one-way air inlet pipe (64), a piston plate (65), three first springs (66) and a one-way air exhaust pipe (67), the cylinder (62) is fixedly connected between two outer sides of the desk body (1), the piston plate (65) is slidably disposed in the cylinder (62), the first springs (66) are connected between one side of the piston plate (65) and one inner side of the cylinder (62) at intervals, the movable rod (63) is connected to one side of the cylinder (62) at intervals in a sliding manner, the number of the movable rod (63) is three, one end of the movable rod (63) is fixedly connected to one side of the piston plate (65), the one-way air exhaust pipe (67) is connected to and communicated with one side of the cylinder (62) at intervals, the three one-way air inlet pipes (64) are connected to and communicated with one side of the cylinder (62), the number of the air inlet pipes is three, the tail end of the one-way air inlet pipe (64) is fixedly connected with the air guide mechanism (7), and the pedal (61) is rotatably connected between the two outer sides of the table body (1) and is in contact fit with one end of the movable rod (63).

3. The desk capable of being raised or lowered as claimed in claim 2, wherein the air guide mechanism (7) comprises a u-shaped pipe (71), a pipeline (72), a cross-shaped block (73) and a second spring (74), the u-shaped pipe (71) is fixedly connected between two sides of the desk body (1) in a penetrating manner, one side of the u-shaped pipe is fixedly connected and communicated with the tail end of the one-way air inlet pipe (64), the pipeline (72) is fixedly connected and communicated with one side of the piston cylinder (5), the tail end of the u-shaped pipe penetrates through the desk body (1) and is fixedly connected and communicated with one side of the u-shaped pipe (71), the cross-shaped block (73) is slidably connected to the middle of one side of the u-shaped pipe (71), and the second spring (74) is connected between one side of the cross-shaped block (73).

4. The desk capable of being raised or lowered according to claim 3, further comprising a fixing mechanism (8), wherein the fixing mechanism (8) comprises a T-shaped rod (81), a connecting rod (82), a rotating shaft (83), a wire guiding wheel (84), a pulling wire (85), a third spring (87), a clamping block (88), a frame body (89), a movable inclined block (810), a fourth spring (811), a net frame (812) and a fixing block (813), the net frame (812) is fixedly connected to one side of the u-shaped pipe (71), the cross-shaped block (73) is arranged in the net frame (812), the T-shaped rod (81) is slidably arranged between two sides of the desk body (1), one end of the T-shaped rod is arranged in the net frame (812), the T-shaped rod (81) is matched with the cross-shaped block (73), the connecting rod (82) is symmetrically and fixedly connected to one side of the T-shaped rod (81), the frame body (89) is spaced from one side of the movable desk body (2) in the circumferential direction, the tail end of the desk penetrates through one side of a desk body (1), fixed blocks (813) are fixedly connected to one side in a frame body (89) at intervals, a movable inclined block (810) is sleeved on the fixed blocks (813) in a sliding mode, fourth springs (811) are symmetrically connected between one side in the movable inclined block (810) and the inner end of the fixed blocks (813), sliding grooves (86) are circumferentially arranged on one side in the desk body (1) at intervals and correspond to the frame body (89), clamping blocks (88) are placed in the sliding grooves (86) in a sliding mode and are in contact fit with the movable inclined blocks (810), third springs (87) are symmetrically connected between one side of the clamping blocks (88) and one side of the sliding grooves (86), rotating shafts (83) are symmetrically connected to two sides in the desk body (1) in a rotating mode, wire guide wheels (84) are fixedly sleeved on the rotating shafts (83), pull wires (85) are fixedly connected to one side of connecting rods (82), and the number of the pull wires (85) on each connecting, the tail end of the pull wire (85) is wound around the wire guide wheel (84) and is fixedly connected with one side of the clamping block (88).

5. The desk capable of being raised or lowered according to claim 4, further comprising a buffer mechanism (9), wherein the buffer mechanism (9) comprises a contact rod (91), a sleeve (92), a friction block (93), a fifth spring (94), a spiral grooved shaft (95), a cam (96), a spiral spring (97) and a contact frame (98), the contact rod (91) is symmetrically and slidably connected to one side of the desk body (1), one end of the contact rod is fixedly connected to one side of the movable desk (2), the sleeve (92) is symmetrically and slidably arranged between two sides of the desk body (1), the friction block (93) is slidably arranged in the sleeve (92), one end of the friction block (93) is in contact fit with the contact rod (91), the fifth spring (94) is connected between one end of the friction block (93) and one side of the sleeve (92), the spiral grooved shaft (95) is rotatably connected between two sides of the middle of the desk body (1), the cam (96) is fixedly sleeved on the spiral groove shaft (95) and is in contact fit with the inner end of the sleeve (92), the volute spiral spring (97) is connected between one side of the cam (96) and one side of the inside of the table body (1), the contact frame (98) is fixedly connected to the middle of one side of the T-shaped rod (81), and the tail end of the contact frame is in contact fit with the groove of the spiral groove shaft (95).

6. A desk capable of being raised or lowered as claimed in claim 5, further comprising a shock-absorbing ring (10) and a sixth spring (11), wherein the shock-absorbing ring (10) is slidably sleeved on the slide bar (4) and is in contact fit with the movable desk (2), and the sixth spring (11) is connected between one side of the shock-absorbing ring (10) and one side outside the desk body (1) and is sleeved on the slide bar (4).

7. The desk capable of being raised or lowered according to claim 6, further comprising a strong magnet (12), a clip-shaped iron block (13) and a filtering frame (14), wherein the strong magnet (12) is fixedly connected to the middle portion of the outer side of the cylinder body (62), the clip-shaped iron block (13) is slidably sleeved on the strong magnet (12), the filtering frame (14) is fixedly connected to the outer side of the clip-shaped iron block (13), and the one-way air suction pipe (67) is located in the filtering frame (14).

8. A desk as claimed in claim 7, wherein the outer end of the friction block (93) is made of rubber.