CN109567391B - Office desk - Google Patents

Abstract

The invention relates to an office table, which is technically characterized in that: support piece sliding connection has the connecting piece, the connecting piece articulates there is pedal spare, still includes the gliding retaining member of restriction connecting piece edge vertical direction, pedal spare is kept away from connecting piece one end and is articulated to have the telescopic landing leg, still includes linkage pedal spare and the synchronous wobbling linkage subassembly of landing leg, the swing angle of pedal spare is the same with the swing angle of landing leg, when pedal spare is towards the direction swing of keeping away from support piece, the landing leg is towards the direction swing of keeping away from pedal spare, when pedal spare swings and the contained angle between the horizontal plane is 0-90 degrees, just when the contained angle between pedal spare and the horizontal plane is 0 degrees, the landing leg is perpendicular with the horizontal plane. According to the invention, the working personnel can place feet on the pedal member, so that the phenomenon of hand numbness and foot numbness of the working personnel during noon break is reduced, and the effects of comfortable noon break and high sleep quality are achieved.

Description

Office desk

Technical Field

The invention relates to the technical field of office supplies, in particular to an office table.

Background

After finishing a busy work in the morning, many white collars and staff who work in office buildings need carry out brief noon break in the office, and noon break is all very important to everyone, and fatigue under busy operating pressure can be alleviated in noon break for get into a better operating condition in the afternoon, improve work efficiency.

The existing office is provided with a comfortable office table and an office chair, and due to the limited office space, people can only lie on the office table or rest on the backrest of the office chair in most cases; however, when people lean on the backrest of the office chair to sleep on the back, because the seat of the office chair has a certain height with the ground, the feet of the people hang down on the ground during rest, and the circulation of blood is not facilitated after the feet of the people hang down on the ground for a long time, so that the phenomenon that the legs and the feet of the people are numb can occur, and the quality of rest is greatly influenced.

Disclosure of Invention

The invention aims to provide an office table which has the advantages of no hand numbness and foot numbness, comfortable afternoon break and high sleeping quality.

Content of the first master right: comprises a table top and a supporting piece for supporting the table top; support piece sliding connection has the connecting piece, the connecting piece articulates there is pedal spare, still includes the gliding retaining member of restriction connecting piece edge vertical direction, pedal spare is kept away from connecting piece one end and is articulated to have the telescopic landing leg, still includes linkage pedal spare and the synchronous wobbling linkage subassembly of landing leg, the swing angle of pedal spare is the same with the swing angle of landing leg, when pedal spare is towards the direction swing of keeping away from support piece, the landing leg is towards the direction swing of keeping away from pedal spare, when pedal spare swings and the contained angle between the horizontal plane is 0-90 degrees, just when the contained angle between pedal spare and the horizontal plane is 0 degrees, the landing leg is perpendicular with the horizontal plane.

By adopting the technical scheme, the office desk is additionally provided with the pedal piece for placing the two feet, when a worker has a rest, the back of the office desk leans against the backrest of the office chair and the two feet are obliquely and straightly placed on the pedal piece, and compared with the situation that the two feet are directly hung on the ground, the comfortable degree for placing the two feet is increased, so that the phenomenon of leg and foot numbness is reduced, and the quality of the rest is improved; the connecting piece can slide on the supporting piece, so that the position between the connecting piece and the supporting piece is changed, the position of the connecting piece can be adjusted according to the leg length of an individual or the comfort degree of putting the leg, the position of the pedal piece hinged with the connecting piece is changed, and the applicability of the pedal piece is further enhanced; the locking piece is arranged so that when the connecting piece slides to a certain position, the relative fixation between the connecting piece and the locking piece can be realized; because one end of the pedal part is hinged with the connecting part, when the included angle between the pedal part and the horizontal plane is 0 degree, the hinge part of the pedal part has certain gravity and places a foot on the pedal part, and the hinge part bears all force, so that the phenomenon of abrasion of the hinge part of the pedal part and the connecting part due to overlarge stress can occur, and the arrangement of the supporting legs ensures that the supporting legs play a certain role in fixing and supporting the hinge part of the pedal part far away from the pedal part and the connecting part, thereby reducing the condition of abrasion of the hinge part of the pedal part and the connecting part due to overlarge stress; because the leg length of the individual or the comfort degree of putting the leg, when the included angle between the pedal piece and the horizontal plane is 0 degree, the height of the pedal piece and the ground is different, and the leg is arranged to be telescopic, thereby enhancing the applicability of the leg to the fixed support of the pedal piece; due to the arrangement of the linkage assembly, the pedal piece and the supporting legs synchronously rotate, the complex operation that the pedal piece is firstly opened and then the supporting legs are opened when the pedal is used is reduced, and the synchronous rotation enables the operation to be simple, convenient and quick; because the swinging angle of the pedal member is 0-90 degrees, the opening and closing of the pedal member are realized, and the occupied space of the pedal member when not in use is reduced when not in use.

The invention is further configured to: the retaining member threaded connection have along the gliding guide of vertical direction, the connecting piece along horizontal direction sliding connection in the guide.

By adopting the technical scheme, the locking piece is rotated due to the threaded connection between the locking piece and the guide piece, so that the guide piece can move along the locking piece in the vertical direction, and meanwhile, when the guide piece slides to a certain position, the locking piece stops rotating, and the guide piece is fixed relative to the locking piece; the connecting piece is along guide horizontal slip, the connecting piece is articulated with pedal, thereby make pedal can remove in vertical direction or horizontal direction, thereby pedal's practicality has been strengthened, according to the long comfortable degree of perhaps putting the leg of individual leg, slide pedal to suitable position, the travelling comfort of foot on pedal has been strengthened, thereby when people lean on the office chair and lean on the back to sleep, the phenomenon of tingling appears in the trick has been reduced, very big improvement the quality of rest.

The invention is further configured to: the linkage assembly comprises a fixed gear fixed on the sliding plate, the fixed gear is provided with a driving wheel meshed with the fixed gear, one end of the driving wheel is rotatably connected with the pedal piece, the other end of the driving wheel is coaxially fixed with a driving bevel gear, the driving bevel gear is provided with a driven bevel gear meshed with the driving bevel gear, the driven bevel gear is coaxially fixed with a first guide gear, the first guide gear is provided with a second guide gear meshed with the first guide gear, one end of a rotating shaft of the second guide gear is rotatably connected with the pedal piece, and the other end of the rotating shaft is fixedly connected with the supporting leg.

By adopting the technical scheme, through the mutual meshing transmission among the gears in the linkage assembly, when the pedal piece needs to be used, the pedal piece swings towards the direction far away from the supporting piece, and meanwhile, the supporting legs swing around the hinge point towards the direction far away from the pedal piece; when the foot rest is not needed, it is achieved that the foot rest swings in a direction close to the support member while the leg swings around the hinge point in a direction close to the foot rest.

The invention is further configured to: the fixed gear, the driving wheel, the driving bevel gear, the driven bevel gear, the first guide gear and the second guide gear are the same in tooth number.

By adopting the technical scheme, the teeth of the fixed gear, the driving wheel, the driving bevel gear, the driven bevel gear, the first guide gear and the second guide gear are the same in number, and the gears are in meshed transmission through the teeth, so that the pedal part and the supporting leg swing at the same angle.

The invention is further configured to: the landing leg includes with pedal articulated outer loop bar and sliding connection in outer loop bar interior loop bar, the concave spiral groove that is equipped with of outer loop bar inner wall, interior loop bar outer wall is equipped with the spiral sand grip with spiral groove sliding connection, the top of interior loop bar is equipped with the elastic component, the top of outer loop bar is seted up and is supplied the elastic component to wear out and with elastic component joint complex card hole.

By adopting the technical scheme, the supporting legs are arranged into the inner sleeve rods and the outer sleeve rods which are mutually sleeved according to the individual leg length or the comfort degree of leg placement, so that the length of the supporting legs is adjusted, the telescopic supporting legs play a role in fixing and supporting the pedal piece, the stress at the hinged part of the pedal piece and the connecting piece is reduced, and the damage of the hinged part of the pedal piece and the connecting piece is reduced; due to the spiral design, the stress surface between the spiral raised line and the spiral groove is inclined, the reaction force is perpendicular to the inclined surface, and the reaction force can be decomposed into a component force in the vertical direction and a component force in the horizontal direction, so that the action of the component force in the vertical direction on the supporting leg is reduced.

The invention is further configured to: the pedal piece is equipped with the trigger piece, works as when the contained angle between pedal piece and the horizontal plane is 0 degree, the trigger piece with the elastic component butt, the elastic component with the card hole breaks away from.

Through adopting above-mentioned technical scheme, the trigger part is equivalent to a trigger switch, when pedal swing to with the horizontal plane between contained angle be 0 degree, trigger part and elastic component butt, the elastic component receives the effect of trigger part power for the elastic component is flexible to break away from with the card hole, thereby interior loop bar moves downwards under the action of gravity, thereby has realized the extension of landing leg.

The invention is further configured to: the bottom end of the outer loop bar is provided with a limiting part for limiting the extension of the supporting leg.

By adopting the technical scheme, the limiting part is arranged, the supporting leg is composed of the telescopic sleeve rod, the supporting leg is in stepless adjustment, the limiting part plays a role in fixing and supporting the extended supporting leg, the situation that the supporting leg contracts due to stress is reduced when the pedal part is under pressure, and the supporting effect of the supporting leg on the pedal part is enhanced.

The invention is further configured to: the locating part comprises a connecting part, the connecting part is hinged to the outer side wall of the outer loop bar, a fastener is arranged at the hinged position of the connecting part and the outer loop bar, the connecting part is fixed with a butting part, and the butting part is butted with the side wall of the inner loop bar through the fastener.

By adopting the technical scheme, the connecting part is hinged with the outer side wall of the outer sleeve rod, so that the connection between the whole limiting part and the supporting leg is realized, and the loss of the limiting part is reduced; the fastener sets up to butt portion provides a biasing force for butt portion and inner loop pole are supported tightly.

The invention is further configured to: the pedal piece is equipped with when the contained angle between pedal piece and the horizontal plane be 90 degrees with connecting piece joint complex joint spare.

Through adopting above-mentioned technical scheme, through the setting of joint spare, when need not use pedal spare, pedal spare one end is articulated with the connecting piece, and the pedal spare other end passes through joint spare joint with the connecting piece to it is fixed with connecting piece laminating and joint to make pedal spare, consequently reduced pedal spare because of the reason of gravity along the condition that articulated department outwards swings and break away from the connecting piece side.

The invention is further configured to: the abutting portion is fixed with a stepping portion.

Through adopting above-mentioned technical scheme, trample the setting of portion, only need trample portion with the pedal and make butt portion butt on the outer wall of outer loop bar to make relatively fixed, easy operation convenient and fast between interior loop bar and the outer loop bar.

In conclusion, the beneficial technical effects of the invention are as follows:

1. because the pedal piece can be fixed after moving up and down along the vertical direction, and can freely move left and right in the horizontal direction, the adjustment of the up-down and left-right positions of the pedal piece is realized, and the applicability of the pedal piece is enhanced.

2. The supporting function of the supporting legs on the pedal piece enables the stress of the pedal piece to be uniform, and therefore the phenomenon that the pedal piece is damaged due to uneven stress is reduced.

3. The supporting legs are designed into the telescopic outer loop bars and the telescopic inner loop bars, so that the length adjustment of the supporting legs is realized, the supporting legs are matched with the height adjustment of the sliding plate, and the supporting effect of the supporting legs on the pedal piece is enhanced.

4. Because the foot rest is deployable and retractable, the foot rest is less obtrusive to the worker while the worker is working.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the footrest open;

FIG. 3 is a schematic view of the closed configuration of the footrest member;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is a schematic structural view of the linkage assembly;

FIG. 6 is an enlarged view of a portion of FIG. 5;

fig. 7 is a schematic view of the structure of the elastic member.

Reference numerals: 1. a support member; 11. mounting a plate; 12. a desktop; 2. a locking member; 21. a screw rod; 211. a handle; 22. a guide bar; 3. a guide member; 31. a guide rail; 311. a chute; 312. a fixed block; 313. fixing the rod; 321. A slide plate; 4. a foot pedal; 41. a support leg; 42. an outer loop bar; 421. a clamping hole; 43. an inner loop bar; 431. an elastic member; 4311. a clamping block; 4312. a spring; 432. a groove; 44. a limiting member; 441. a connecting portion; 442. an abutting portion; 443. a stepping part; 444. a fastener; 46. a spiral rib; 5. a trigger; 51. a fixed part; 52. a protrusion; 6. a clamping piece; 61. a card slot; 62. clamping the strip; 7. a gravity ball; 81. fixing a gear; 82. a drive wheel; 83. a drive bevel gear; 84. a driven bevel gear; 85. a first guide gear; 86. a second guide gear.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1, the office table disclosed by the invention comprises a table top 12 and a supporting member 1 for supporting the table top 12, wherein the supporting member 1 comprises a mounting plate 11 on the front side and mounting plates 11 on the left side and the right side, the mounting plates 11 on the left side and the right side are parallel to each other and are arranged perpendicular to the mounting plate 11 on the front side, and the table top 12 is fixed on the three mounting plates 11.

Referring to fig. 1 and 2, a locking member 2 and two guide rods 22 are fixed on the mounting plate 11 on the front side, the locking member 2 includes a screw rod 21, the screw rod 21 is installed along the vertical direction and located under the table top 12, the guide rods 22 are installed along the vertical direction and located on the left and right sides of the screw rod 21, a handle 211 is fixed on the top end of the screw rod 21, and the handle 211 penetrates through the table top 12 and is located above the table top 12.

Referring to fig. 2 and 4, the screw rod 21 is in threaded connection with a guide 3 sliding in the vertical direction, the guide 3 includes a horizontally arranged guide rail 31, and the guide rail 31 is slidably disposed through the guide rod 22 in the vertical direction.

One end, close to the ground, of one side surface of the mounting plate 11, which is far away from the front side surface of the guide rail 31 is fixed with a sliding groove 311 along the length direction thereof, and a connecting piece, namely a sliding plate 321, is slidably connected in the sliding groove 311.

The guide rail 31 slides vertically down and up along the lead screw 21 and the guide bar 22, and the slide plate 321 slides horizontally left and right along the slide rail.

Two fixed blocks 312 are fixed on one side surface of the sliding plate 321 far away from the guide rail 31, one end of the two fixed blocks 312 close to the ground and close to two sides of the sliding plate 321, and a fixed rod 313 is fixed between the two fixed blocks 312.

The fixing lever 313 is hinged with a foothold 4 along a length direction thereof.

The end of the foot rest 4 away from the fixing rod 313 is hinged with a left telescopic leg 41 and a right telescopic leg 41, and the two legs 41 are close to the two sides of the foot rest 4.

When the included angle between the foot rest 4 and the horizontal plane is 90 degrees, the foot rest 4 is attached to the sliding plate 321, and the left and right support legs 41 are attached to the foot rest 4.

When the angle between the foot rest 4 and the horizontal plane is 0 degrees, the left and right legs 41 are perpendicular to the horizontal plane.

When the footrest 4 is pivoted away from the front mounting plate 11, the left leg 41 pivots clockwise about the hinge point away from the footrest 4 and the right leg 41 pivots counterclockwise about the hinge point away from the footrest 4.

Referring to fig. 5 and 6, a linkage assembly for synchronously swinging the footrest 4 and the support legs 41 is provided between the footrest 4 and the support legs 41.

The linkage assembly includes two fixed gears 81 fixed to the fixing rod 313, and the two fixed gears 81 are respectively located at both sides of the stepping member 4 and spaced apart from both sides of the stepping member 4 by a certain distance; each fixed gear 81 is provided with a driving wheel 82 meshed with the fixed gear, one end of a rotating shaft of the driving wheel 82 is rotatably connected with the side surface of the pedal member 4, the other end of the rotating shaft is coaxially fixed with a driving bevel gear 83, the driving bevel gear 83 is provided with a driven bevel gear 84 meshed with the driving bevel gear, the driven bevel gear 84 is coaxially and rotatably connected with a first guide gear 85, the rotating shaft between the driven bevel gear 84 and the first guide gear 85 is fixedly connected with the side surface of the pedal member 4 through a bearing, the first guide gear 85 is provided with a second guide gear 86 meshed with the first guide gear, one end of the rotating shaft of the second guide gear 86 is rotatably connected with the pedal member 4, and the other end of the rotating shaft of the second guide gear 86 is fixedly connected with the supporting leg 41.

The fixed gear 81, the driving wheel 82, the drive bevel gear 83, the driven bevel gear 84, the first guide gear 85, and the second guide gear 86 have the same number of teeth.

The angle of oscillation of the foot rest 4 is the same as the angle of oscillation of the leg 41.

Referring to fig. 7, the leg 41 comprises an outer loop bar 42 hinged to the footrest member 4 and an inner loop bar 43 slidably connected inside the outer loop bar 42, the length of the outer loop bar 42 is smaller than that of the inner loop bar 43, and a gravity ball 7 is fixed on one end of the inner loop bar 43 away from the outer loop bar 42; the inner wall of the outer loop bar 42 is concavely provided with a spiral groove, and the outer wall of the inner loop bar 43 is fixed with a spiral convex strip 46 which is in sliding connection with the spiral groove.

The top end of the inner loop bar 43 is provided with a groove 432, an elastic piece 431 is fixedly connected in the groove 432, the elastic piece 431 comprises a spring 4312 and a fixture block 4311, one end of the spring 4312 is fixed with the fixture block 4311, and the other end is fixed with the bottom of the groove 432; a clamping hole 421 for the clamping block 4311 to penetrate out and to be in clamping fit with the clamping block 4311 is arranged through the side wall of the outer sleeve rod 42 close to the top end.

Referring to fig. 3 and 4, the triggering member 5 is fixed to an end of the stepping member 4 away from the fixing lever 313, the triggering member 5 includes a fixing portion 51 and a protrusion 52 fixed to the fixing portion 51, and the fixing portion 51 is located at both sides of the stepping member 4.

When the angle between the pedal 4 and the horizontal plane is 0 degree, the protrusion 52 abuts against the latch 4311, the spring 4312 is compressed toward the groove 432, and the latch 4311 is disengaged from the latch hole 421.

A limiting piece 44 for limiting the extension and retraction of the supporting leg 41 is hinged to the bottom end of the outer loop bar 42, the limiting piece 44 comprises a connecting portion 441 hinged to the outer wall of the outer loop bar 42, and an abutting portion 442 is fixed to the connecting portion 441; a fastening member 444 is attached to the joint of the connecting portion 441 and the outer shank 42, and the abutting portion 442 abuts against the outer wall of the inner shank 43 via the fastening member 444.

The fastening member 444 is a torsion spring, one end of which is fixedly connected to the outside of the outer loop bar 42, and the other end of which is fixedly connected to the connecting portion 441.

The abutment portion 442 has a step portion 443 fixed thereto.

Pedal 4 is equipped with slide 321 joint complex joint spare 6, and the slider is kept away from the slider and is fixed with card strip 62 with the rotation junction of pedal 4, and pedal 4 is kept away from pedal 4 and is equipped with and blocks strip 62 joint complex draw-in groove 61 with the rotation junction of slider.

The implementation principle and the beneficial effects of the embodiment are as follows:

the implementation principle is as follows:

first, the handle 211 is rotated according to the personal needs of the worker so that the foothold 4 is raised to a proper position and the foothold 4 can be freely slid in the horizontal direction.

When a worker has a rest, the worker steps on the pedal element 4 by feet, by means of friction between the foot bottom plate and the clamping groove 61, the pedal element 4 swings outwards in the direction away from the sliding plate 321, meanwhile, the left leg 41 swings clockwise around the hinge point in the direction away from the pedal element 4, the right leg 41 swings anticlockwise around the hinge point in the direction away from the pedal element 4, when the included angle between the pedal element 4 and the horizontal plane is 0 degree, the clamping block 4311 on the left leg 41 abuts against the left bulge 52, the spring 4312 compresses towards the groove bottom of the groove 432, the lug is separated from the clamping hole 421, the inner loop bar 43 rotates and descends in the vertical direction until contacting with the ground, the treading part 443 is stepped downwards by the feet to enable the abutting part 442 to abut against and be fixed with the outer wall of the outer loop bar 42, and after the pedal element 4 is stabilized, the worker can place the pedal element 4 comfortably; the opening of the right leg 41 is the same as the left leg 41.

When the staff need to get up pedal 4, at first trample the portion 443 upwards with the foot, wait to butt portion 442 and overcoat pole 42 outer wall and loosen the back, promote pedal 4 with the foot, make pedal 4 inwards swing towards the direction that is close to slide 321, left side landing leg 41 is towards the direction that is close to pedal 4 around the pin joint anticlockwise swing, right side landing leg 41 is towards the direction that is close to pedal 4 around the pin joint clockwise swing, until pedal 4 and slide 321 laminating, left and right sides landing leg 41 and the laminating of slide 321, card strip 62 is fixed with draw-in groove 61 joint, the staff can carry out relevant office work.

Has the advantages that:

because the pedal 4 can move up and down along the vertical direction and then is fixed, the horizontal direction can move left and right freely, thereby realizing the adjustment of the up-down left-right position of the pedal 4 and enhancing the applicability of the pedal 4.

Due to the supporting function of the supporting legs 41 on the foot rest 4, the stress of the foot rest 4 is uniform, and the phenomenon that the foot rest 4 is damaged due to uneven stress is reduced.

By designing the supporting legs 41 as telescopic outer and inner rods 42, 43, the length of the supporting legs 41 is adjusted to match the height of the sliding plate 321, and the supporting effect of the supporting legs 41 on the pedal element 4 is enhanced.

Due to the arrangement of the gravity ball 7, on one hand, the inner loop bar 43 is accelerated to extend vertically and downwards under the action of the gravity ball 7, and on the other hand, in the process that the supporting leg 41 is retracted, the arc surface of the gravity ball 7 is beneficial to the retraction of the inner loop bar 43.

Since the footrests 4 are deployable and retractable, the obstruction of the footrests 4 to the staff is reduced when the staff is working.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (5)

1. A desk comprising a desktop (12) and a support (1) for supporting the desktop (12), characterized in that: the connecting piece is connected with the supporting piece (1) in a sliding mode, the connecting piece is hinged with a pedal piece (4), the connecting piece further comprises a locking piece (2) for limiting the connecting piece to slide along the vertical direction, one end, far away from the connecting piece, of the pedal piece (4) is hinged with a telescopic supporting leg (41), the connecting piece further comprises a linkage assembly for linking the pedal piece (4) and the supporting leg (41) to swing synchronously, the swing angle of the pedal piece (4) is the same as that of the supporting leg (41), when the pedal piece (4) swings towards the direction far away from the supporting piece (1), the supporting leg (41) swings towards the direction far away from the pedal piece (4), the included angle between the pedal piece (4) and the horizontal plane is 0-90 degrees, and when the included angle between the pedal piece (4) and the horizontal plane is 0 degree, the supporting leg (41) is perpendicular to the horizontal plane; the linkage assembly comprises two fixed gears (81) fixed on the fixed rod (313), and the two fixed gears (81) are respectively positioned at two sides of the pedal member (4) and keep a certain distance from two sides of the pedal member (4); each fixed gear (81) is provided with a driving wheel (82) meshed with the fixed gear, one end of a rotating shaft of each driving wheel (82) is rotatably connected with the side surface of the pedal member (4), a driving bevel gear (83) is coaxially fixed at the other end of the driving gear, the driving bevel gear (83) is provided with a driven bevel gear (84) meshed with the driving bevel gear, the driven bevel gear (84) is coaxially and rotatably connected with a first guide gear (85), the rotating shaft between the driven bevel gear (84) and the first guide gear (85) is fixedly connected with the side surface of the pedal member (4) through a bearing, the first guide gear (85) is provided with a second guide gear (86) meshed with the first guide gear, one end of the rotating shaft of the second guide gear (86) is rotatably connected with the pedal member (4), the other end of the rotating shaft is fixedly connected with the supporting leg (41), the supporting leg (41) comprises an outer sleeve rod (42) hinged with the pedal member (4) and an inner sleeve rod (43) connected in the outer sleeve rod (42) in a sliding manner, the bottom end of the outer loop bar (42) is hinged with a limiting piece (44) for limiting the extension of the supporting leg (41), and one end of the pedal piece (4) far away from the fixed rod (313) is fixed with a trigger piece (5) for releasing the locking between the limiting piece (44) and the outer loop bar (42) and the inner loop bar (43);

a spiral groove is concavely formed in the inner wall of the outer sleeve rod (42), a spiral convex strip (46) in sliding connection with the spiral groove is arranged on the outer wall of the inner sleeve rod (43), an elastic part (431) is arranged at the top end of the inner sleeve rod (43), and a clamping hole (421) through which the elastic part (431) penetrates and is in clamping fit with the elastic part (431) is formed in the top end of the outer sleeve rod (42);

when the included angle between the pedal part (4) and the horizontal plane is 0 degree, the trigger part (5) is abutted against the elastic part (431), and the elastic part (431) is separated from the clamping hole (421);

the limiting piece (44) comprises a connecting portion (441), the connecting portion (441) is hinged to the outer side wall of the outer sleeve rod (42), a fastening piece (444) is arranged at the hinged position of the connecting portion (441) and the outer sleeve rod (42), an abutting portion (442) is fixed to the connecting portion (441), and the abutting portion (442) abuts against the side wall of the inner sleeve rod (43) through the fastening piece (444).

2. A desk as recited in claim 1, wherein: retaining member (2) threaded connection has along the gliding guide (3) of vertical direction, the connecting piece along horizontal direction sliding connection in guide (3).

3. A desk as recited in claim 1, wherein: the fixed gear (81), the driving wheel (82), the driving bevel gear (83), the driven bevel gear (84), the first guide gear (85) and the second guide gear (86) have the same number of teeth.

4. A desk as recited in claim 1, wherein: pedal spare (4) be equipped with when the contained angle between pedal spare (4) and the horizontal plane be 90 degrees with connecting piece joint complex joint spare (6).

5. A desk as recited in claim 1, wherein: a step portion (443) is fixed to the contact portion (442).

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