CN209610435U - A kind of Extensible desk leg - Google Patents

Abstract

The utility model provides a kind of Extensible desk leg, including pedestal, outer tube, inner sleeve and driving box, is equipped with driving device in driving box, and driving device includes drive seat, is equipped with power device in the upper end of drive seat, screw rod is equipped on the output shaft of power device；It is equipped with fixed device in the bottom of outer tube, is equipped with support tube on the securing means, is equipped with nut block at the top of support tube, screw rod protrudes into support tube and cooperates with nut block, is equipped with limiting device in the bottom of screw rod；Anti-skid device is equipped on screw rod and between drive seat and nut block, fixed device, which is arranged, can reinforce the stability of supporting tube structure, prevent the bottom of support tube from generating deformation, keep the structure of table leg more stable；Limiting device is set in the bottom of screw rod, limiting device can prevent screw rod from swinging in support tube, promote stability when lifting；Anti-skid device, which is arranged, can prevent screw rod autorotation under the gravity of desktop from declining, and promote the stability of table height.

Description

A kind of Extensible desk leg

Technical field

The utility model relates to home equipments of handling official business, and in particular to a kind of Extensible desk leg.

Background technique

Desk is essential fitment in people's routine work and life, and currently used desk is typically all solid To determine height, can not highly adjust, such desk there is many defects,

Such as the desk that children use, since children are in growth and development stage, height variation is obvious, if different Age bracket uses the desk of sustained height, it is easy to cause children bow-backed and myopia, for this purpose, people have invented the desk that can be gone up and down To be applicable in different demands.

Application No. is 201720658740.3, the day for announcing is a kind of electronic to disclose in the patent document of 2018.06.22 Same table, including pedestal and desktop, the left and right sides is vertically arranged with first sleeve, movable sleeve in first sleeve respectively on pedestal It is connected to the second casing, desktop is connected on the second casing, motor and reduction gearbox are installed in desktop, reduction gearbox front end is connected with vertical To bevel gear, longitudinal bevel gear front end is provided with lateral bevel gear, and gear shaft, part under gear shaft are arranged in lateral bevel gear For screw configuration, gear shaft is arranged in standpipe, and riser top ends are provided with screw bolt seat.The utility model pass through longitudinal bevel gear and The engaged transmission band movable gear shaft of lateral bevel gear rotates, so that desktop be risen, gear ratio worm drive are more stable, pass Dynamic ratio is accurate, and reliable operation, high-efficient, the service life is long, and compact-sized, power, speed and the size range used is wide, can be preferably Meet the needs of adapting to different user, passes through the speed of the also adjustable desktop lifting of the setting of motor and reduction gearbox.But the party There are also defects for case, such as: the lower end of the screw rod in the program is freely, since the length of screw rod is longer, in this way, screw rod It can be swung during rotation and lifting, cause desk to generate vibration, screw rod can hit standpipe when serious；In addition, due to First sleeve, the second casing and standpipe generally use thin-walled hollow square tube, and intensity is not very high, the especially both ends intensity of tubing Minimum, in the program, the upper end of standpipe has been set with screw bolt seat, can enhance the intensity of standpipe upper end, and the lower end of standpipe be it is empty, Intensity is low, and long-play is easy to produce deformation, leads to table leg fluctuation of service；There are also the programs to be not provided with anti-skid device, Screw rod can rotate decline under the gravity of desktop and the gravity for the object being placed on desktop, cause height uncertain.

Summary of the invention

To solve problems of the prior art, the utility model provides a kind of Extensible desk leg, promotes table leg lifting Stability and structural stability, prevent desktop from voluntarily gliding.

A kind of to achieve the above purpose, the technical solution of the present invention is: Extensible desk leg, including pedestal, outer tube, Inner sleeve and driving box, outer tube are vertically arranged on pedestal, and inner sleeve is slidably arranged in outer tube, and driving box setting exists The top of inner sleeve is equipped with driving device in driving box, and driving device includes drive seat, is equipped with power in the upper end of drive seat Device is equipped with screw rod on the output shaft of power device；It is equipped with fixed device in the bottom of outer tube, is equipped on the securing means Support tube is equipped with nut block at the top of support tube, and screw rod protrudes into support tube and cooperates with nut block, sets in the bottom of screw rod There is limiting device；Anti-skid device is equipped on screw rod and between drive seat and nut block.

The above structure, fixed device, which is arranged, can reinforce the stability of supporting tube structure, prevent the bottom of support tube from generating shape Become, keeps the structure of table leg more stable；Limiting device is set in the bottom of screw rod, limiting device can prevent screw rod from putting in support tube It is dynamic, promote stability when lifting；Anti-skid device, which is arranged, can prevent screw rod in the gravity of desktop and the object being placed on desktop Gravity under autorotation decline, promote the stability of table height.

Further, the power device includes worm gear and drive motor, worm gear Shell the upper end of drive seat is set, the shell of drive motor is arranged on the shell of worm gear, drives horse The output shaft reached is connected with the input shaft of worm gear, and worm gear is common transmission mechanism, makes an uproar Sound is small, stable drive.

Further, the screw rod from top toward bottom end successively include linkage section, anti-slip section and thread segment；On thread segment One end far from linkage section is equipped with limit section, and the outer diameter for limiting section is less than the outer diameter of thread segment, and the both ends for limiting section, which have, keeps out Face, limiting device setting is in limit section；The cross section of linkage section is regular hexagon；The outer diameter of anti-slip section is less than the outer of thread segment Diameter, is equipped with positioning plane along the length direction of anti-slip section in anti-slip section, and anti-skid device is arranged in anti-slip section；Turbine and worm The output shaft of transmission device is connected with linkage section.Linkage section is used to be connected with power device；Anti-slip section is used to installation of anti-skid devices, It positions plane and is used to anti-slip positioning device；Limit section is used to install limiting device.

Further, the limiting device includes the limit for preventing screw rod from swinging in support tube being located in limit section Block；Limited block includes more than two position-limiting units being stitched together, and is equipped on each position-limiting unit and matches with limit section Spacing breach, in limit section, limited block is spliced by position-limiting unit for limited block setting, and installation and removal are convenient.

Further, the position-limiting unit includes the first position-limiting unit and the second position-limiting unit, and the first position-limiting unit includes First Mosaic face, the second position-limiting unit include the second Mosaic face, more than one positioning column are equipped on the first Mosaic face, the Two Mosaic faces are equipped with more than one location hole corresponding with positioning column, and positioning column is inserted into location hole；It is single in the first limit Member is equipped with the more than one first through hole for passing through the first Mosaic face, is equipped on the second position-limiting unit corresponding with first through hole The second through-hole across the second Mosaic face, first through hole far from the first Mosaic face one end be equipped with circular counter bore, second Through-hole is equipped with the counterbore of regular hexagon far from one end of the second Mosaic face；The limit of regular hexagon is equipped in the counterbore of regular hexagon Position nut, is arranged caging bolt, after the end of thread of caging bolt sequentially passes through first through hole and the second through-hole in first through hole It screws in stop nut, the head of caging bolt is sunk in circular counter bore, and the first position-limiting unit and the second position-limiting unit are by positioning Column and location hole provide positioning, then are fastened by caging bolt and stop nut, and the stop nut of regular hexagon sinks to regular hexagon Counterbore in, it can be achieved that stop nut anti-rotation, and do not hinder the sliding of limited block, the head of caging bolt is sunk to round heavy In hole, the sliding of limited block will not be equally hindered.

Further, the shape of limited block is matched with the inner wall of support tube, is contacted in limited block with the inner wall of support tube Face is equipped with the raised line extended along support tube length direction, and setting raised line can reduce limited block and support the contact surface of inside pipe wall Product reduces friction.

Further, the fixed device includes the fixed plate for being located at outer sleeve inner wall bottom end, and waist is equipped in fixed plate Shape location hole；Fixing seat is equipped on kidney-shaped location hole, the upper end of fixing seat is inserted into the inner hole of support tube, under fixing seat End be equipped with the matched positioning convex platform of kidney-shaped location hole, the fixation that is fixed on fixing seat in fixed plate is equipped on positioning convex platform The kidney-shaped positioning convex platform of part, the setting of fixing seat lower end is inserted into kidney-shaped positioning hole, and accurate positioning, anti-rotation effect is good, kidney-shaped positioning Hole and kidney-shaped positioning convex platform simple processing.

Further, the bottom surface of the fixed plate is higher than the lower end surface of outer tube；Threaded hole, institute are equipped on positioning convex platform Stating fixing piece is fixing bolt, and the thread segment of fixing bolt passes through the spiral shell of screw-in positioning convex platform after the kidney-shaped location hole in fixed plate In pit；Fixing seat is up successively arranged from positioning convex platform and keeps out section and inserting paragraph, and inserting paragraph is cube structure, in inserting paragraph The rib of side is equipped with riveting slot close to the one end for keeping out section, and the bottom surface of fixed plate is higher than the lower end surface of outer tube, then fixing bolt Head have the space of receiving, do not need to open up on pedestal and keep away a hole, prevent the intensity for reducing pedestal；Setting riveting slot can be After fixing seat is inserted into support tube, support tube position riveting corresponding with riveting slot is turned in riveting slot, is processed by riveting, no It needs fixing seat can securely be connect with support tube using additional connector.

Further, the anti-skid device includes the Anti-slip cover being located in anti-slip section, the inner ring and anti-slip section of Anti-slip cover Match, anti-skidding torsional spring is equipped on Anti-slip cover, anti-skidding torsional spring and Anti-slip cover are interference fitted, one end of anti-skidding torsional spring and the week of drive seat To limit, the other end of anti-skidding torsional spring is free end, the rotation side when direction of rotation and anti-skidding torsional spring when screw rod declines are tightened To identical, arrangement above, Anti-slip cover and screw rod synchronous rotary, when drive motor stops working, the gravity of desktop revolves screw rod Turn decline, anti-skidding torsional spring is driven to tighten, anti-skidding torsional spring firmly holds Anti-slip cover tightly, and desktop is prevented to continue to decline.

Further, the top of outer tube and between inner sleeve and outer tube be equipped with friction sleeve；In inner sleeve Bottom and between inner sleeve and outer tube be equipped with friction plate, the pedestal includes base panel, pedestal pedestal and foot pad, bottom Seat surface plate is located at the top of pedestal pedestal, and foot pad is located at the lower section of pedestal pedestal；In the fixed plate of outer tube be equipped with one with On pedestal fixation hole, on base panel be equipped with base panel through-hole corresponding with pedestal fixation hole position, fixed in pedestal Pedestal fixing bolt is equipped in hole, the end of thread of pedestal fixing bolt screws in pedestal fixation hole after passing through base panel through-hole, Position corresponding with base panel through-hole is equipped with pedestal fixing bolt through hole on pedestal pedestal；Base panel and pedestal base It connecting by welding between frame, friction sleeve and friction plate, which is arranged, can reduce the degree that inner sleeve shakes in outer tube, And it can prevent outer tube and inner sleeve from directly contacting, reduce contact area when inner sleeve slides in outer tube, reduction rubs Power is wiped, prevents outer tube and inner sleeve from crossing quick-wearing；Pedestal fixing bolt screws in pedestal fixation hole after passing through base panel through-hole Base panel is connected with outer tube, this connection type can be easily installed and dismantle outer tube；Base panel and pedestal pedestal Between connect by welding, good integrity, the stable structure of pedestal.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the top view of the utility model；

Fig. 3 is Section A-A cross-sectional view in Fig. 2；

Fig. 4 is the decomposition texture schematic diagram of the utility model；

Fig. 5 is the structural schematic diagram of outer tube in the utility model；

Fig. 6 is the decomposition texture schematic diagram of inner sleeve and friction plate in the utility model；

Fig. 7 is the structural schematic diagram of fixing seat in the utility model；

Fig. 8 is enlarged drawing at B in Fig. 4；

Fig. 9 is enlarged drawing at C in Fig. 4.

Specific embodiment

The utility model is described in further details with reference to the accompanying drawings and detailed description.

It is as shown in Figures 1 to 9: a kind of Extensible desk leg, including pedestal 1, outer tube 2, inner sleeve 3 and driving box 4.

Pedestal 1 includes base panel 10, pedestal pedestal 11 and foot pad 12, and base panel 10 is welded on the upper of pedestal pedestal 11 Side, 12 spiral of foot pad are located at the lower section of pedestal pedestal 11；Base panel through-hole 100 is equipped on base panel 10；In pedestal base Position corresponding with base panel through-hole 100 is equipped with pedestal fixing bolt through hole 110 on frame 11.

Outer tube 2 is vertically arranged on base panel 10, is equipped with fixed plate 20, fixed plate in the bottom end of 2 inner wall of outer tube 20 bottom surface is higher than the lower end surface of outer tube 2, and a kidney-shaped location hole 21 and the fixed spiral shell of four pedestals are equipped in fixed plate 20 Pit 22；Pedestal fixing bolt (not shown) is equipped in pedestal fixing screwed hole 22, the end of thread of pedestal fixing bolt passes through It is screwed in pedestal fixing screwed hole 22 after base panel through-hole 100 on pedestal pedestal 11.

It is equipped with friction sleeve 24 on the top of outer tube 2, is equipped with friction plate 34 in the bottom of inner sleeve 3, in the present embodiment, outside The cross section of casing 2 and inner sleeve 3 is rectangle.Two friction plates are respectively provided in the bottom end of 3 four side walls of inner sleeve to fix Hole 30 is equipped with fixed column 341 corresponding with friction plate fixation hole 30 on friction plate 34, and friction plate 34 is by by fixed column 341 It is inserted into fixed in friction plate fixation hole 30.More than one buckle 342, buckle 342 can also be set in the bottom end of friction plate 34 The bottom end for catching on side wall keeps the fixation of friction plate 34 more reliable.Inner sleeve 3 can be reduced by setting friction sleeve 24 and friction plate 34 The degree shaken in outer tube 2, and can prevent outer tube 2 and inner sleeve 3 from directly contacting, reduce inner sleeve 3 in outer tube 2 Contact area when interior sliding reduces frictional force, keeps sliding more smooth, can also prevent outer tube 2 and inner sleeve 3 from crossing quick-wearing； The top of inner sleeve is arranged in driving box 4.

Support tube 6 is equipped with by fixing seat 5 in fixed plate 20, is equipped with and kidney-shaped location hole 21 in the bottom of fixing seat 5 Matched positioning convex platform 51, fixing seat 5 is up successively arranged from positioning convex platform 51 keeps out section 52 and inserting paragraph 53, and inserting paragraph 53 is inserted In the inner hole for entering support tube 6, it is equipped with threaded hole 510 on positioning convex platform 51, is equipped on positioning convex platform 51 fixing seat 5 is fixed Fixing bolt 55 in fixed plate 20, the thread segment of fixing bolt 55 screw in after passing through the kidney-shaped location hole 21 in fixed plate 20 In threaded hole 510 on positioning convex platform 51, inserting paragraph 53 is cube structure, and the rib in 53 side of inserting paragraph is close to keep out section 52 One end be equipped with riveting slot 56, after inserting paragraph 53 is inserted into support tube 6, support tube 6 is turned to the corresponding position riveting of slot 56 is riveted It rivets in slot 56.

It is equipped with driving device in driving box 4, driving device includes drive seat 70, is equipped with power in the upper end of drive seat 70 Device is equipped with screw rod 8 on the output shaft of power device；It is equipped with nut block 61 at the top of support tube 6, screw rod 8 protrudes into support Cooperate in pipe 6 and with nut block 61, is equipped with limiting device in the bottom of screw rod 8.

Power device includes worm gear 710 and drive motor 711, the shell of worm gear 710 The upper end of drive seat 70 is arranged in body, and the shell of drive motor 711 is arranged on the shell of worm gear 710, drives The output shaft of dynamic motor 711 is connected with the input shaft of worm gear 710.

Screw rod 8 from top successively include linkage section 81, anti-slip section 82 and thread segment 83 toward bottom end；It is separate on thread segment 83 One end of linkage section 81 is equipped with limit section 831, and the outer diameter of limit section 831 is less than the outer diameter of thread segment 83, limits the both ends of section 831 With the face of keeping out, the setting of limiting device 9 is in limit section 831；The cross section of linkage section 81 is regular hexagon；Outside anti-slip section 82 Diameter is less than the outer diameter of thread segment, is equipped with positioning plane 820 along the length direction of anti-slip section 82 in anti-slip section 82；Turbine and worm The output shaft of transmission device 710 is connected with linkage section 81.

Limiting device includes the limited block for preventing screw rod 8 from swinging in support tube 6 being located in limit section 831, this implementation In example, limited block is spliced by two position-limiting units, is equipped on each position-limiting unit and the limit matched limit of section 831 Notch 90, in the present embodiment, spacing breach forms stop collar, the inner surface and limit section of stop collar after two position-limiting units splicings 831 outer surface cooperation, two end faces of stop collar cooperate with the face of keeping out at limit 831 both ends of section respectively, the outside of limited block Face is matched with the medial surface of support tube 6, and the raised line 95 extended along 6 length direction of support tube is equipped on the lateral surface of limited block, Two position-limiting units in the utility model are respectively the first position-limiting unit 91 and the second position-limiting unit 92, the first position-limiting unit 91 Including the first Mosaic face 910, the second position-limiting unit 92 includes the second Mosaic face 920, sets that there are two fixed on the first Mosaic face 910 Position column (not shown) is set on the second Mosaic face 920 there are two location hole 921 corresponding with positioning column, and positioning column insertion positions In hole 921；It is set on the first position-limiting unit 91 there are two the first through hole 912 for passing through the first Mosaic face 910, it is single in the second limit Member 92 is equipped with the second through-hole 922 for passing through the second Mosaic face 920 corresponding with first through hole 912, separate in first through hole 912 One end of first Mosaic face 910 is equipped with circular counter bore 9120, is equipped in the second through-hole 922 far from one end of the second Mosaic face 920 The counterbore (not shown) of regular hexagon；The stop nut (not shown) of regular hexagon is equipped in the counterbore of regular hexagon, the Caging bolt (not shown) is set in one through-hole 912, the end of thread of caging bolt sequentially passes through first through hole 912 and the second through-hole It is screwed in stop nut after 922, the head of caging bolt is sunk in circular counter bore 9120.

Anti-skid device, anti-skid device are equipped in the anti-slip section 82 of screw rod 8 and between drive seat 70 and nut block 61 Including the Anti-slip cover 83 being located in anti-slip section 82, the inner ring of Anti-slip cover 83 is matched with anti-slip section 82, and positioning plane 820 prevents anti-skidding Set 83 is rotated relative to screw rod 8, and anti-skidding torsional spring 84 is equipped on Anti-slip cover, and anti-skidding torsional spring 84 is interference fitted with Anti-slip cover 83, In The bottom of drive seat 70 is equipped with anti-skidding notch 700, and the upper end of anti-skidding torsional spring 84, which is caught in anti-skidding notch 700, realizes circumferential limit, The lower end of anti-skidding torsional spring 84 is free end, direction of rotation phase when direction of rotation when screw rod 8 declines is tightened with anti-skidding torsional spring 84 Together, due to being provided with positioning plane 820, Anti-slip cover 83 and 8 synchronous rotary of screw rod, when drive motor 711 stops working, desktop Gravity there is a possibility that screw rod rotation decline, the rotation decline of screw rod drive the tightening of anti-skidding torsional spring, anti-skidding torsional spring, which is firmly held, to be prevented Sliding sleeve prevents desktop from continuing to decline.

Table frame threaded hole 40 is equipped on the two sidewalls of driving box 4, table frame threaded hole 40 is used to connect table frame, desktop installation In table frame.

Above scheme, setting fixing seat 5 can reinforce the stability of 6 structure of support tube, prevent the bottom of support tube 6 from generating shape Become, keeps the structure of table leg more stable；Limiting device is set in the bottom of screw rod 8, limiting device can prevent screw rod 8 in the mistake of lifting It is swung in support tube 6 in journey, promotes stability when lifting；Be arranged anti-skid device can prevent screw rod 8 desktop gravity and It is placed on autorotation under the gravity of the object on desktop to decline, makes the highly stable of desk.

Claims (10)

1. a kind of Extensible desk leg, including pedestal, outer tube, inner sleeve and driving box, outer tube is vertically arranged on pedestal, interior It is arranged in outer tube to cannula slide, the top of inner sleeve is arranged in driving box, it is characterised in that: be equipped with and drive in driving box Dynamic device, driving device includes drive seat, is equipped with power device in the upper end of drive seat, is equipped on the output shaft of power device Screw rod；It is equipped with fixed device in the bottom of outer tube, is equipped with support tube on the securing means, is equipped with nut at the top of support tube Block, screw rod protrude into support tube and cooperate with nut block, are equipped with limiting device in the bottom of screw rod；On screw rod and it is located at driving Anti-skid device is equipped between seat and nut block.

2. a kind of Extensible desk leg according to claim 1, it is characterised in that: the power device includes that turbine and worm passes The upper end of drive seat, the shell setting of drive motor is arranged in dynamic device and drive motor, the shell of worm gear On the shell of worm gear, the output shaft of drive motor is connected with the input shaft of worm gear.

3. a kind of Extensible desk leg according to claim 2, it is characterised in that: the screw rod is successively wrapped from top toward bottom end Include linkage section, anti-slip section and thread segment；One end on thread segment far from linkage section is equipped with limit section, and the outer diameter for limiting section is less than The outer diameter of thread segment, the both ends for limiting section have face of keeping out, and limiting device setting is in limit section；The cross section of linkage section is positive Hexagon；The outer diameter of anti-slip section is less than the outer diameter of thread segment, is equipped with positioning along the length direction of anti-slip section in anti-slip section and puts down Face, anti-skid device are arranged in anti-slip section；The output shaft of worm gear is connected with linkage section.

4. a kind of Extensible desk leg according to claim 1, it is characterised in that: the limiting device includes being located at limit section On prevent the limited block that screw rod is swung in support tube；Limited block includes more than two position-limiting units being stitched together, In It is equipped on each position-limiting unit and the limit matched spacing breach of section.

5. a kind of Extensible desk leg according to claim 4, it is characterised in that: the position-limiting unit includes that the first limit is single Member and the second position-limiting unit, the first position-limiting unit include the first Mosaic face, and the second position-limiting unit includes the second Mosaic face, first Mosaic face is equipped with more than one positioning column, and more than one positioning corresponding with positioning column is equipped on the second Mosaic face Hole, positioning column are inserted into location hole；The more than one first through hole for passing through the first Mosaic face is equipped on the first position-limiting unit, The second through-hole for passing through the second Mosaic face corresponding with first through hole is equipped on the second position-limiting unit, in first through hole far from the One end of one Mosaic face is equipped with circular counter bore, is equipped with the counterbore of regular hexagon far from one end of the second Mosaic face in the second through-hole； It is equipped with the stop nut of regular hexagon in the counterbore of regular hexagon, caging bolt is set in first through hole, caging bolt The end of thread screws in stop nut after sequentially passing through first through hole and the second through-hole, and circular counter bore is sunk on the head of caging bolt It is interior.

6. a kind of Extensible desk leg according to claim 4, it is characterised in that: the shape of limited block and the inner wall of support tube Matching is equipped with the raised line extended along support tube length direction on the face that limited block is contacted with the inner wall of support tube.

7. a kind of Extensible desk leg according to claim 1, it is characterised in that: the fixed device includes being located at outer tube The fixed plate of inner wall bottom end is equipped with kidney-shaped location hole in fixed plate；On kidney-shaped location hole be equipped with fixing seat, fixing seat it is upper End insertion support tube inner hole in, the lower end of fixing seat be equipped with the matched positioning convex platform of kidney-shaped location hole, in positioning convex platform Be equipped with fixing piece fixing seat being fixed in fixed plate.

8. a kind of Extensible desk leg according to claim 7, it is characterised in that: the bottom surface of the fixed plate is higher than outer tube Lower end surface；Threaded hole is equipped on positioning convex platform, the fixing piece is fixing bolt, and the thread segment of fixing bolt, which passes through, to be fixed It is screwed in after kidney-shaped location hole on plate in the threaded hole of positioning convex platform；Fixing seat be up successively arranged from positioning convex platform keep out section and Inserting paragraph, inserting paragraph are cube structure, and the rib in inserting paragraph side is equipped with riveting slot close to the one end for keeping out section.

9. a kind of Extensible desk leg according to claim 3, it is characterised in that: the anti-skid device includes being located at anti-slip section On Anti-slip cover, the inner ring of Anti-slip cover matches with anti-slip section, and anti-skidding torsional spring, anti-skidding torsional spring and Anti-slip cover mistake are equipped on Anti-slip cover It is full of cooperation, one end of anti-skidding torsional spring and the circumferential of drive seat limit, and the other end of anti-skidding torsional spring is free end, when screw rod declines Direction of rotation when direction of rotation is tightened with anti-skidding torsional spring is identical.

10. a kind of Extensible desk leg according to claim 1, it is characterised in that: outer tube top and be located at inner sleeve Friction sleeve is equipped between pipe and outer tube；Inner sleeve bottom and between inner sleeve and outer tube be equipped with friction plate, institute Stating pedestal includes base panel, pedestal pedestal and foot pad, and base panel is located at the top of pedestal pedestal, and foot pad is located at pedestal pedestal Lower section；It is equipped with more than one pedestal fixation hole in the fixed plate of outer tube, is equipped on base panel and is fixed with pedestal The corresponding base panel through-hole in hole site is equipped with pedestal fixing bolt, the end of thread of pedestal fixing bolt in pedestal fixation hole It is screwed in pedestal fixation hole after base panel through-hole, position corresponding with base panel through-hole is equipped on pedestal pedestal Pedestal fixing bolt through hole；It is connected by welding between base panel and pedestal pedestal.