CN220694665U - Lifting upright post and electric lifting table - Google Patents

Abstract

The utility model discloses a lifting stand column and an electric lifting table, which belong to the field of linear actuators and solve the problem that noise is easy to generate due to overlarge cable shaking amplitude in the lifting stand column.

Description

Lifting upright post and electric lifting table

[ field of technology ]

The utility model relates to the field of linear actuators, in particular to a lifting upright post and an electric lifting table.

[ background Art ]

The lifting upright post is a common component in the field of linear driving equipment and is widely applied to equipment such as electric lifting tables, electric lifting beds and the like. Taking electric lift table as an example, electric lift table includes the table, locates crossbeam and two lift stands of table below, disposes the controller on the crossbeam, and the controller is connected with the motor electricity on two lift stands respectively for the operation of motor control motor is simultaneously supplied with power to the motor, generally, disposes power source on the crossbeam and is used for switching in the electric wire netting, and at the in-process that the table was lifting movement, the cable of connecting power source also can be along with the lift of table and activity, makes electric lift table around the space comparatively messy.

In order to solve the above problems, the cable is arranged in the lifting upright post to be hidden on the existing electric lifting table, the cable arranged in the lifting upright post can stretch and retract along with the stretching and retracting of the lifting upright post to keep the power supply to the electric equipment, but the telescopic cable has a longer length and is easy to shake radially, so that noise is generated due to the collision between the telescopic cable and the sleeve on the lifting upright post in the stretching and retracting process, and the use experience of a user is affected.

[ utility model ]

The utility model aims to solve the technical problems that the lifting upright post is provided for overcoming the defects of the prior art, and the problem that noise is easy to generate due to overlarge shaking amplitude of a spiral cable in the lifting upright post is solved.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the lifting stand column comprises a sleeve component, a driving assembly and a spiral cable, wherein the driving assembly stretches out and draws back from the sleeve component, the spiral cable axially penetrates through the sleeve component, the lifting stand column further comprises a first wire fixing part, a second wire fixing part and a third wire fixing part which are sequentially connected onto the spiral cable along the axial direction of the spiral cable, the first wire fixing part and the second wire fixing part produce axial relative displacement along with the stretching motion of the driving assembly so as to stretch or shrink the spiral cable between the two parts, and the second wire fixing part and the third wire fixing part produce axial relative displacement along with the stretching motion of the driving assembly so as to stretch or shrink the spiral cable between the two parts.

On the basis of the scheme, the transmission assembly comprises a first telescopic component, a second telescopic component and a third telescopic component which can be telescopic relatively, the first wire fixing part and the second wire fixing part generate axial relative displacement along with the relative telescopic action of the first telescopic component and the second telescopic component, and the second wire fixing part and the third wire fixing part generate axial relative displacement along with the relative telescopic action of the second telescopic component and the third telescopic component.

On the basis of the scheme, the first telescopic part is a first screw rod, the second telescopic part is an outer sleeve with a first transmission nut, the third telescopic part is an inner sleeve with a second transmission nut, the outer sleeve is sleeved outside the inner sleeve, the transmission assembly further comprises a second screw rod sleeved outside the first screw rod, the first screw rod can drive the second screw rod to synchronously rotate and can axially and relatively stretch out and draw back with the second screw rod, the first screw rod is in threaded fit with the first transmission nut, and the second screw rod is in threaded fit with the second transmission nut.

On the basis of the scheme, the lifting upright post further comprises a driving device used for driving the first screw rod to rotate, the first wire fixing part is installed on the driving device, the second wire fixing part is installed on the outer sleeve, and the third wire fixing part is installed on the sleeve assembly.

On the basis of the scheme, the side part of the spiral cable is provided with the sound insulation baffle.

On the basis of the scheme, the sleeve assembly sequentially comprises an inner pipe, a middle pipe and an outer pipe from inside to outside, the cross-sectional area of the sleeve assembly in an elongation state is gradually increased along the setting direction of a first solid line part, a second solid line part and a third solid line part, the length of a spiral line cable between the first solid line part and the second solid line part in the blocking range of the sound insulation baffle is H1, and the length of the spiral line cable between the second solid line part and the third solid line part in the blocking range of the sound insulation baffle is H2, and the H1 is larger than the H2.

On the basis of the scheme, the second wire fixing part is arranged on the sound insulation baffle.

On the basis of the scheme, the sound insulation baffle can stretch and retract along with the stretching and retracting of the transmission assembly.

On the basis of the scheme, the spiral cable and the transmission assembly are arranged side by side, the first wire fixing part and/or the second wire fixing part comprises a guide post extending into the sleeve assembly, and at least part of the spiral cable is wound on the guide post.

On the basis of the scheme, the spiral cable encloses a containing space for containing the transmission assembly.

On the basis of the scheme, acting force is transmitted to the spiral cable through the second wire fixing part when the transmission assembly performs telescopic motion.

On the basis of the scheme, the second wire fixing part is fixedly connected to the spiral wire cable; alternatively, the second wire fixing portion is axially positioned on the spiral wire.

On the basis of the scheme, the sleeve assembly sequentially comprises an inner pipe, a middle pipe and an outer pipe from inside to outside, the cross-sectional area of the sleeve assembly in an extension state is gradually increased along the arrangement direction of the first wire fixing portion, the second wire fixing portion and the third wire fixing portion, and the length of the spiral cable between the first wire fixing portion and the second wire fixing portion is smaller than that between the second wire fixing portion and the third wire fixing portion.

On the basis of the scheme, the first wire fixing part and the third wire fixing part are connected with an integrated spiral wire cable.

On the basis of the scheme, the second wire fixing part comprises a clamping part used for clamping the spiral wire; or, the second wire fixing part comprises a stop part, and the stop part is positioned between two coils of the spiral wire cable to axially stop the two coils of the wire cable respectively.

On the basis of the scheme, the spiral cable comprises a first cable and a second cable which is arranged in a split mode with the first cable, the first cable is connected between the first fixed line part and the second fixed line part, the second cable is connected between the second fixed line part and the third fixed line part, and the first cable is electrically connected with the second cable.

On the basis of the scheme, the second wire fixing part comprises clamping parts for clamping the first cable and the second cable respectively, and the first cable and the second cable are connected to establish electrical connection between the first cable and the second cable; or, the second wire fixing part comprises a conductive module, and the first cable and the second cable are respectively connected to the conductive module to establish electrical connection between the two.

On the basis of the scheme, the first wire fixing part comprises a first wire clamp, the third wire fixing part comprises a second wire clamp, and the first wire clamp and the second wire clamp are used for respectively axially positioning two ends of the spiral wire cable.

The electric lifting table comprises a table plate and a lifting upright post disclosed in any technical scheme, wherein a controller is arranged on the table plate, and the spiral cable is electrically connected to the controller.

The utility model has the beneficial effects that:

the lifting stand column disclosed by the utility model comprises the sleeve component and the transmission assembly, wherein the spiral cable is arranged in the sleeve component and can stretch and retract along with the stretching and retracting of the transmission assembly, and after the design, the spiral cable of some electric equipment can be arranged in the sleeve component, so that the spiral cable can walk from the inside of the lifting stand column, the mess phenomenon caused by the exposure of the spiral cable is avoided, and a user cannot trip over the spiral cable when passing.

The lifting upright post is provided with a first wire fixing part, a second wire fixing part and a third wire fixing part which are used for axially positioning the spiral wire cable, so that the spiral wire cable can be driven to stretch in the axial direction when the transmission assembly stretches. The first wire fixing part and the second wire fixing part can generate relative axial displacement along with the expansion and contraction of the transmission assembly, so that the spiral wire connected between the second wire fixing part and the first wire fixing part can be driven to expand and contract, and the third wire fixing part and the second wire fixing part can generate relative axial displacement along with the expansion and contraction of the transmission assembly, so that the spiral wire connected between the second wire fixing part and the third wire fixing part can be driven to expand and contract.

In the prior art, the cable is usually directly connected between two fixed points about the lift stand, compare in prior art, after the first solidus portion of helix cable connection in this application, the second solidus portion, the third solidus portion, can form two independent deformation's parts, helix cable between second solidus portion and the first solidus portion, helix cable between third solidus portion and the second solidus portion, two sections cables are because of the axial positioning of three solidus portions, thereby the axial flexible between the two can not influence each other, compare in longer cable, the rocking range that the cable that length is shorter will be less, thereby can make the helix cable be difficult for producing noise with sleeve pipe subassembly collision along with transmission assembly flexible in-process, even collision has appeared, but can not produce obvious noise because the rocking range of two sections cables is little.

Further, the transmission assembly comprises a first telescopic component, a second telescopic component and a third telescopic component which can be telescopic relatively, the first wire fixing part and the second wire fixing part can generate axial relative displacement along with the relative telescopic action of the first telescopic component and the second telescopic component, and the second wire fixing part and the third wire fixing part can generate axial relative displacement along with the relative telescopic action of the second telescopic component and the third telescopic component. The first telescopic component, the second telescopic component and the third telescopic component can be telescopic relatively, and when the first telescopic component and the second telescopic component are telescopic relatively, the total length of the first telescopic component and the second telescopic component in the axial direction can be changed, so that the relative positions of the first wire fixing part and the second wire fixing part in the axial direction can be changed, the length of the spiral wire between the first wire fixing part and the second wire fixing part can be finally changed, the relative positions of the second wire fixing part and the third wire fixing part in the axial direction can be also changed when the second telescopic component and the third telescopic component are telescopic relatively, and the length of the spiral wire between the second wire fixing part and the third wire fixing part can be finally changed.

Further, the first telescopic part is a first screw rod, the second telescopic part is an outer sleeve with a first transmission nut, the third telescopic part is an inner sleeve with a second transmission nut, the outer sleeve is sleeved outside the inner sleeve, the transmission assembly further comprises a second screw rod sleeved outside the first screw rod, the first screw rod can drive the second screw rod to synchronously rotate and can axially and relatively stretch out and draw back with the second screw rod, the first screw rod is in threaded fit with the first transmission nut, and the second screw rod is in threaded fit with the second transmission nut. The first screw rod is in threaded fit with the first transmission nut to stretch out and draw back relative to the outer sleeve and the second screw rod in the rotation process, the second screw rod is driven to rotate by the first screw rod in the rotation process, and the second screw rod is in threaded fit with the second transmission nut to drive the inner sleeve to stretch out and draw back relative to the outer sleeve.

Further, the lifting upright post further comprises a driving device for driving the first screw rod to rotate, the first wire fixing portion is installed on the driving device, the second wire fixing portion is installed on the outer sleeve, and the third wire fixing portion is installed on the sleeve assembly. The first lead screw and the inner sleeve can stretch out and draw back in different directions relative to the outer sleeve, and when the transmission assembly is in a contracted state, the first lead screw, the second lead screw and the inner sleeve are all positioned in the outer sleeve, the second wire fixing part is arranged on the outer sleeve, the second wire fixing part and the outer sleeve can be kept relatively fixed, the first wire fixing part is arranged on the driving device, the first wire fixing part and the first lead screw can be kept relatively fixed, the third wire fixing part is arranged on the sleeve component, the sleeve component stretches out and draws back synchronously along with the transmission assembly, and the third wire fixing part and the inner sleeve can be kept relatively fixed.

Further, a sound insulation baffle is arranged on the side portion of the spiral cable. The sound insulation baffle is arranged between the spiral cable and the inner wall of the sleeve assembly, so that the spiral cable can be prevented from shaking to directly contact with the inner wall of the sleeve assembly in the stretching process, the sound insulation baffle has good noise reduction performance, noise generated by collision of the spiral cable can be reduced, shaking amplitude of the spiral cable can be reduced under the blocking of the sound insulation baffle, and shaking amplitude of the spiral cable outside the range of the sound insulation baffle can be reduced.

Further, the sleeve assembly sequentially comprises an inner pipe, a middle pipe and an outer pipe from inside to outside, the cross-sectional area of the sleeve assembly is gradually increased along the setting direction of a first solid line part, a second solid line part and a third solid line part in an elongation state, the length of a spiral line cable between the first solid line part and the second solid line part in the baffle blocking range is H1, and the length of the spiral line cable between the second solid line part and the third solid line part in the baffle blocking range is H2, and the H1 is larger than the H2. After the sleeve component is stretched, part of the spiral cable between the first fixed line part and the second fixed line part is positioned in the inner tube, part of the spiral cable between the second fixed line part and the third fixed line part is positioned in the outer tube, and the inner diameter of the inner tube is smaller than that of the outer tube, so that the spiral cable in the inner tube is easier to collide with the wall of the inner tube, the blocking effect of the sound insulation baffle on the spiral cable between the first fixed line part and the second fixed line part can be enhanced by designing H1 to be larger than H2, the shaking amplitude of the spiral cable between the first fixed line part and the second fixed line part is smaller than that between the second fixed line part and the third fixed line part, the shaking amplitude of the spiral cable in the inner tube can be reduced, and the spiral cable in the inner tube is not easy to contact with the wall of the inner tube, and the spiral cable in the outer tube is not easy to contact with the wall of the outer tube because the shaking amplitude of the spiral cable in the outer tube is larger.

Further, the second wire fixing portion is mounted on the soundproof baffle. In the process of extending or shortening the transmission assembly, the relative positions of the sound insulation baffle and the second wire fixing part are unchanged, so that the blocking effect on the spiral wire between the first wire fixing part and the second wire fixing part and the spiral wire between the second wire fixing part and the third wire fixing part can be simultaneously maintained.

Further, the sound insulation baffle can stretch and retract along with the stretching and retracting of the transmission assembly. The telescopic sound insulation baffle can be stretched after the transmission assembly is stretched, and the blocking effect on the spiral cable is enlarged, so that the blocking effect on the spiral cable is prevented from being weakened due to stretching of the spiral cable.

Further, the spiral cable and the transmission assembly are arranged side by side, the first wire fixing part and/or the second wire fixing part comprises a guide post extending into the sleeve assembly, and at least part of the spiral cable is wound on the guide post. The spiral cable is arranged on the side part of the transmission assembly, so that the spiral cable can be conveniently assembled, the lifting upright post can be conveniently assembled, and the spiral cable is not easy to interfere in the telescoping process. The guide post can carry out radial positioning to the spiral cable of winding above that, and can reduce the rocking range of spiral cable, makes the difficult inner wall that contacts the sleeve pipe subassembly of spiral cable.

Further, the spiral cable encloses a containing space for containing the transmission assembly. The spiral cable is arranged on the periphery of the transmission assembly, the size of the space required by the arrangement of the spiral cable can be reduced, the size of the lifting stand column is reduced, and meanwhile, the transmission assembly can radially position the spiral cable, so that the shaking amplitude of the spiral cable is reduced.

Further, when the transmission assembly performs telescopic motion, acting force is transmitted to the spiral cable through the second wire fixing part. When the transmission assembly moves in a telescopic mode, the second wire fixing part is displaced, the second wire fixing part can transmit acting force to the spiral wire through connection with the spiral wire, so that the spiral wire connected between the second wire fixing part and the first wire fixing part stretches axially, and the spiral wire connected between the second wire fixing part and the third wire fixing part stretches axially.

Further, the second wire fixing part is fixedly connected to the spiral wire cable; alternatively, the second wire fixing portion is axially positioned on the spiral wire. If the second wire fixing part is fixedly connected with the spiral wire, the second wire fixing part and the spiral wire are relatively fixed, and relative displacement does not exist between the second wire fixing part and the spiral wire, so that the movement of the part, connected with the second wire fixing part, of the spiral wire towards the first wire fixing part or the third wire fixing part is limited; if the second wire fixing part is axially positioned on the spiral wire, the second wire fixing part and the spiral wire are moved together, and the axial positions of the second wire fixing part and the spiral wire are not changed, so that the movement of the part, connected with the second wire fixing part, of the spiral wire towards the first wire fixing part or the third wire fixing part is limited. The second wire fixing part can be connected with one coil of spiral wire cable and can also be connected with a plurality of coils of spiral wire cable so as to limit the axial displacement of the plurality of coils of spiral wire cable simultaneously and improve the limiting effect on the spiral wire cable, wherein the plurality of coils of spiral wire cable can be a plurality of coils of spiral wire cable connected with each other or a plurality of coils of spiral wire cable arranged at intervals, and after two coils of spiral wire cable at intervals are limited, the rest coils of spiral wire cable between the two coils of spiral wire cable are limited.

Further, the sleeve assembly sequentially comprises an inner pipe, a middle pipe and an outer pipe from inside to outside, the cross-sectional area of the sleeve assembly is gradually increased along the arrangement direction of the first wire fixing part, the second wire fixing part and the third wire fixing part in the extension state, and the length of the spiral wire between the first wire fixing part and the second wire fixing part is smaller than that between the second wire fixing part and the third wire fixing part. After the sleeve component is stretched, part of the spiral cable between the first fixed line part and the second fixed line part is positioned in the inner tube, part of the spiral cable between the second fixed line part and the third fixed line part is positioned in the outer tube, and the inner diameter of the inner tube is smaller than that of the outer tube, so that the spiral cable in the inner tube is easier to collide with the tube wall of the inner tube, the length of the spiral cable between the first fixed line part and the second fixed line part is designed to be smaller than that between the second fixed line part and the third fixed line part, the shaking amplitude of the spiral cable in the inner tube can be reduced, and the spiral cable is not easy to contact with the tube wall of the inner tube, and the shaking amplitude of the spiral cable in the outer tube is larger, but because of the larger inner space of the outer tube, the spiral cable is also not easy to contact with the tube wall of the outer tube.

Further, an integrated spiral cable is connected between the first wire fixing part and the third wire fixing part. The spiral cable is a whole continuous spiral cable, the current transmission process does not need to be switched, the current quality can be guaranteed, and the spiral cable cannot break in the stretching process to cause the condition of power transmission interruption.

Further, the spiral cable comprises a first cable and a second cable which is arranged in a split mode with the first cable, the first cable is connected between the first wire fixing portion and the second wire fixing portion, the second cable is connected between the second wire fixing portion and the third wire fixing portion, and the first cable is electrically connected with the second cable. The first cable and the second cable are two sections of independent spiral cables, and the lengths of the first cable and the second cable can be selected according to the lengths of the lifting upright posts so as to adapt to the lifting upright posts with various sizes.

Further, the second cable fixing part comprises clamping parts for clamping the first cable and the second cable respectively, and the first cable and the second cable are connected to establish electrical connection between the two; or, the second wire fixing part comprises a conductive module, and the first cable and the second cable are respectively connected to the conductive module to establish electrical connection between the two. The clamping part can simultaneously clamp the first cable and the second cable, so that the first cable and the second cable can be respectively stretched and contracted without mutual interference, the part, clamped by the clamping part, of the first cable and the second cable is electrically connected in a direct connection mode so as to perform power transmission, and the position, electrically connected by the first cable and the second cable, of the part is kept fixed under the limiting effect of the clamping part, so that the electric wire connection between the first cable and the second cable is kept uninterrupted. The conductive module has conductive performance, so that power transmission can be performed between the first cable and the second cable which are connected to the conductive module, and the first cable and the second cable can maintain an electrical connection state with the conductive module so as to ensure that power transmission cannot be interrupted.

The utility model also discloses an electric lifting table, which adopts the lifting upright post and has all the beneficial effects of the lifting upright post. Some electric equipment can be placed on the desk, and because the spiral cable is hidden in the lifting upright post, the power line of the electric equipment on the desk and the external spiral cable are not mutually wound, so that the power line and the external spiral cable are pulled in the lifting process of the desk. In the use process of the electric lifting table, the noise generated in the lifting upright post is small, and the use experience of a user cannot be influenced.

These features and advantages of the present utility model will be disclosed in detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The utility model is further described with reference to the accompanying drawings:

FIG. 1 is a schematic view of a lifting column according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a structure of an elongated lifting column according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a lifting column in an embodiment of the utility model;

FIG. 4 is a schematic view of an internal structure of a lifting column according to an embodiment of the present utility model;

FIG. 5 is an exploded view of a junction box according to an embodiment of the present utility model;

FIG. 6 is an exploded view of an alternative view of a junction box according to an embodiment of the present utility model;

FIG. 7 is an enlarged schematic view of FIG. 5A;

FIG. 8 is an enlarged schematic view at B in FIG. 6;

fig. 9 is a schematic diagram illustrating connection between a spiral cable and a power interface according to an embodiment of the present utility model;

FIG. 10 is a schematic diagram of a transmission assembly according to an embodiment of the present utility model;

fig. 11 is a schematic view of an embodiment of the utility model after the spiral cable is stretched;

fig. 12 is a schematic view of another embodiment of the present utility model in which the spiral cable is disposed within the sleeve assembly;

fig. 13 is a schematic diagram illustrating the cooperation between the clamping portion and the spiral cable according to an embodiment of the present utility model;

fig. 14 is a schematic diagram illustrating the cooperation between the stop portion and the spiral cable according to the embodiment of the present utility model;

fig. 15 is a schematic diagram illustrating the cooperation between two clamping portions and a spiral cable according to an embodiment of the present utility model.

Reference numerals:

an inner tube 100, an outer tube 110, a middle tube 120, and a fixing plate 130;

a first telescopic member 200, a second telescopic member 210, a third telescopic member 220, a driving device 230, a second screw 240, a first transmission nut 250, a second transmission nut 260;

the first fixing line part 300, the guide post 301, the second fixing line part 310, the third fixing line part 320, the opening 330, the second line clamp 331, the positioning clamping groove 332, the positioning hole 333 and the stop protrusion 334;

The spiral cable 400, the wiring cavity 401, the accommodating space 402, the first cable 410, the second cable 420 and the positioning protrusion 430;

a soundproof baffle 500;

the first power interface 600, the junction box 610, the box body 620, the junction cavity 630, the first assembly hole 640, the second assembly hole 650, the binding post 660, the socket hole 670, and the pre-positioning member 680.

[ detailed description ] of the utility model

The technical solutions of the embodiments of the present utility model will be explained and illustrated below with reference to the drawings of the embodiments of the present utility model, but the following embodiments are only preferred embodiments of the present utility model, and not all embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present utility model.

The appearances of the phrases such as "exemplary," "some embodiments," and the like in the following text are meant to be "serving as examples, embodiments, or illustrative," and any embodiment described as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, it will be appreciated by those skilled in the art that the present disclosure may be practiced without some of these specific details.

Referring to fig. 1 to 4, 10 and 11, the embodiment of the utility model discloses a lifting column, which is a three-section column and comprises a sleeve assembly and a transmission assembly arranged in the sleeve assembly, wherein the sleeve assembly comprises an inner pipe 100, an outer pipe 110 arranged outside the inner pipe 100 and a middle pipe 120 arranged between the inner pipe 100 and the outer pipe 110, the transmission assembly is used for driving the sleeve assembly to stretch, the transmission assembly comprises a first stretching component 200, a second stretching component 210 and a third stretching component 220, the first stretching component 200 and the third stretching component 220 are arranged in the second stretching component 210 and can stretch relative to the second stretching component 210, the second stretching component 210 is arranged between the first stretching component 200 and the third stretching component 220 when the transmission assembly is in an extending state, the lifting column further comprises a driving device 230, the driving device 230 is a motor box, and a motor for providing power required by stretching motion for the transmission assembly is arranged in the driving device 230.

The lifting stand column further comprises a spiral cable 400 penetrating through the inside of the sleeve component along the extending and contracting direction of the sleeve component, the spiral cable 400 can supply power to the transmission assembly, the spiral cable 400 is in a spiral shape and is provided with a plurality of coils of cables, when the transmission assembly extends, the screw pitch of the spiral cable 400 is increased, the whole body of the spiral cable is extended, when the transmission assembly is shortened, the screw pitch of the spiral cable 400 is reduced, and the whole body of the spiral cable is retracted. After such design, the cable of some consumer can be built-in the sleeve pipe subassembly to make the cable can follow the inside of lift stand and advance the walking line, can not cause the cable to expose the mess phenomenon that causes, the user also can not stumble by the cable when passing.

The lifting upright post is further provided with a first wire fixing part 300, a second wire fixing part 310 and a third wire fixing part 320 which are sequentially arranged along the extending and retracting direction of the spiral wire 400 and used for axially positioning the spiral wire 400, the first wire fixing part 300 is relatively fixed with the first telescopic component 200, the second wire fixing part 310 is relatively fixed with the second telescopic component 210, and the third wire fixing part 320 is relatively fixed with the third telescopic component 220.

The first cable fixing portion 300 may move relative to the second cable fixing portion 310 along with the expansion and contraction of the first expansion and contraction component 200, the third cable fixing portion 320 may move relative to the second cable fixing portion 310 along with the expansion and contraction of the third expansion and contraction component 220, the spiral cable 400 includes a first cable 410 and a second cable 420, the first cable 410 and the second cable 420 are electrically connected to ensure that the power transmission is not interrupted, the first cable 410 and the second cable 420 can both expand and contract along with the expansion and contraction of the transmission assembly, the first cable 410 is connected between the second cable fixing portion 310 and the first cable fixing portion 300 to expand and contract along with the movement of the first cable fixing portion 300, and the second cable 420 is connected between the second cable fixing portion 310 and the third cable fixing portion 320 to expand and contract along with the movement of the third cable fixing portion 320. As shown in fig. 4 and 11, the first cable has a length L1 before elongation, a length L3 after elongation, a length L2 before elongation, and a length L4 after elongation.

In the prior art, the cable is generally directly connected between the upper fixing point and the lower fixing point of the lifting upright post, compared with the prior art, after the spiral cable 400 is connected by the first fixing line portion 300, the second fixing line portion 310 and the third fixing line portion 320, the spiral cable 400 can be divided into two parts which are independently deformed, namely, the first cable 410 and the second cable 420, and the two parts of the cable are axially positioned due to the three fixing line portions, so that axial expansion and contraction between the two parts cannot be mutually influenced, and compared with a longer cable, the shaking amplitude generated by the first cable 410 and the second cable 420 with shorter length can be smaller, so that the spiral cable 400 cannot easily collide with a sleeve assembly in the expansion and contraction process of the transmission assembly to generate noise, and even if collision occurs, obvious noise cannot be generated due to small shaking amplitude of the first cable 410 and the second cable 420.

The utility model concept of the application is that a whole section of cable is divided into two sections of cables which are independently telescopic, so that the shaking amplitude of a single section of cable is reduced under the condition that the whole telescopic length of the cable is unchanged. In addition to three columns, the solution of the present application can also be used for multiple columns (at least more than two).

Referring to fig. 4, in an embodiment of the present utility model, the spiral cable 400 between the first wire fixing portion 300 and the third wire fixing portion 320 is a whole continuous cable, the first cable 410 is integrally formed on the second cable 420, so that the quality of the current can be ensured, the situation that the power transmission is interrupted due to breakage in the extending and retracting process of the spiral cable 400 is avoided, and the second wire fixing portion 310 is connected with the spiral cable 400 to separate the spiral cable 400 into the first cable 410 and the second cable 420.

When the transmission assembly stretches and contracts, the second wire fixing part 310 transmits acting force to the spiral wire 400 and is used for axially positioning the spiral wire 400, so that the connection part of the spiral wire 400 and the second wire fixing part 310 cannot generate axial displacement and moves towards the first wire fixing part 300 or the third wire fixing part 320 in the stretching and contracting process of the transmission assembly.

In this embodiment, the second wire fixing portion 310 is connected to the spiral wire 400 in two ways:

referring to fig. 13, one: the second wire fixing portion 310 includes a clamping portion, the clamping portion is fixedly connected with the spiral wire 400 through a clamping manner, so as to limit the movement of a clamped portion on the spiral wire 400, limit the movement of a portion, connected with the clamping portion, of the spiral wire to the direction of the first wire fixing portion or the direction of the third wire fixing portion, and limit the spiral wire 400 by the clamping portion. Exemplary: the clamping part may be a pressing plate mounted on the second telescopic member 210, both ends of the pressing plate are connected to the second telescopic member 210, and the spiral cable 400 is pressed between the pressing plate and the second telescopic member 210.

Referring to fig. 14, two: the second wire fixing portion 310 includes a stop portion, where the stop portion only has a stop effect on the spiral wire 400, the second wire fixing portion 310 is a stop rib or a stop plate, and is located between two coils of the spiral wire 400 to respectively stop the two coils of wires axially, so as to axially position the two coils of wires, and can limit the movement of the coil of the first wire 410 towards the third wire fixing portion 320 and the movement of the coil of the second wire 420 towards the first wire fixing portion 300, and the stop portion does not damage the spiral wire 400 to affect the current quality.

In the above, as shown in fig. 13, only one second wire fixing portion may be provided, and the second wire fixing portion may divide the spiral wire between the first wire fixing portion 300 and the third wire fixing portion 320 into two sections that are independently telescopic after being connected to the spiral wire 400; as shown in fig. 15, a plurality of second wire fixing portions may be disposed, and the plurality of second wire fixing portions are disposed at intervals along the extending and contracting direction of the spiral wire cable 400, and after the plurality of second wire fixing portions are connected with the spiral wire cable 400, the extension and contraction of the spiral wire cable 400 between the first and second wire fixing portions is limited, so that the length of the spiral wire cable 400 between the first wire fixing portion 300 and the second wire fixing portion 310, and between the second wire fixing portion 310 and the third wire fixing portion 320 can be shortened, so as to enhance the effect of the second wire fixing portion 310 on reducing the vibration amplitude of the spiral wire cable 400.

Each second wire fixing part can only transmit axial force to one circle of spiral wire cable, and when one circle of spiral wire cable moves towards the first wire fixing part or the third wire fixing part in the extending and contracting process of the transmission assembly under the limiting effect of the second wire fixing part, the whole shaking amplitude of the spiral wire cable is reduced. The second wire fixing part can also limit the axial displacement of the multi-coil spiral wire to the axial force of the multi-coil spiral wire, so that the limiting effect on the multi-coil spiral wire is improved, wherein the multi-coil spiral wire can be a plurality of coils of spiral wire connected with each other or a plurality of coils of wire arranged at intervals, and after two coils of spiral wire at intervals are limited, the rest coils of spiral wire between the two coils of spiral wire are limited.

In another embodiment of the present utility model, the first cable and the second cable are two independent spiral cables, the lengths of the first cable and the second cable can be selected according to the lengths of the lifting columns to adapt to the lifting columns with various sizes, and the first cable and the second cable are electrically connected for power transmission.

In this embodiment, the second wire fixing portion is connected to the spiral wire in two manners:

first, the second gu line portion is including being used for the chucking portion of chucking first cable and second cable respectively, first cable and second cable link to each other in order to establish electric connection between the two, chucking portion can only set up one, can chucking first cable and second cable simultaneously, make first cable and second cable flexible respectively and can not interfere each other, first cable and second cable carry out electric connection by the mode of chucking portion chucking through direct connection's position, in order to carry out power transmission, first cable and second cable electric connection's position keeps the fixed under the limiting displacement of chucking portion, thereby keep the electric wire connection between the two uninterrupted. The clamping parts can be arranged in two, so that the first cable and the second cable are respectively clamped.

The second wire fixing part comprises a conductive module, and the first cable and the second cable are respectively and electrically connected to the conductive module so as to establish electrical connection between the first cable and the second cable. The conductive module has conductive performance, so that power transmission can be performed between a first cable and a second cable connected to the conductive module, and the first cable and the second cable can maintain an electrical connection state with the conductive module so as to maintain relative fixation with the second telescopic component, and meanwhile, power transmission is ensured not to be interrupted.

In the telescoping process, the inner tube 100 and the outer tube 110 can be telescoping relative to the middle tube 120, the first cable fixing part 300 is fixed relative to the inner tube 100, the third cable fixing part 320 is fixed relative to the outer tube 110, the first cable 410 can be telescoping along with telescoping of the inner tube 100 relative to the middle tube 120, the second cable 420 can be telescoping along with telescoping of the outer tube 110 relative to the middle tube 120, when the telescoping tube assembly is in an elongation state, part of the first cable 410 is located in the inner tube 100, part of the second cable 420 is located in the outer tube 110, because the inner diameter of the inner tube 100 is smaller than the inner diameter of the outer tube 110, the first cable 410 is easier to collide with the tube wall of the inner tube 100, based on the embodiment, a cable cavity 401 for arranging the spiral cable 400 is formed between one side of the transmission assembly and the telescoping tube assembly, the spiral cable is arranged on the side of the transmission assembly so as to be parallel with the transmission assembly, assembly is convenient for assembling the spiral cable, meanwhile, the first cable fixing part 300 is arranged on the inner tube 100 to surround a guide post 301, part of the inner tube 301 is used for accommodating the guide post 301, the guide post 301 is easy to shake, the first cable 410 can be wound on the guide post 301 to be at least 10cm, and the length of the first cable 410 can be reduced to 20cm, and the length of the first cable 410 can be wound on the guide post 410 is not longer than the guide post 410, and the first cable 410 can be wound to be 20cm, and the length of the guide post 410 can be wound to be 20 cm. In addition, a guide post can be arranged on the second wire fixing part to limit the second cable in the radial direction.

Based on the above embodiment, in one embodiment of the present utility model, the length of the first cable is smaller than that of the second cable, that is, L1 is smaller than L2, and in the case that the whole length of the spiral cable is unchanged, the first cable with smaller length has smaller wobble amplitude, so that the first cable is not easy to contact with the inner pipe wall. The second cable is longer, so also has the scope of rocking that is greater than first cable, but the space in the outer tube is bigger, and even the second cable rocks the scope bigger, the second cable still is difficult to contact the pipe wall of outer tube.

Referring to fig. 4, in an embodiment of the present utility model, the second telescopic member 210 is provided with the soundproof baffle 500 on both sides of the spiral cable 400, and the soundproof baffle 500 is disposed between the spiral cable 400 and the inner wall of the sleeve assembly, so that the spiral cable 400 can be prevented from directly contacting the inner wall of the sleeve assembly due to shaking during the telescopic process, the soundproof baffle 500 has good noise reduction performance, noise generated by collision between the spiral cable 400 and the soundproof baffle 500 can be reduced, and shaking amplitude of the spiral cable 400 can be reduced under the blocking of the soundproof baffle 500, and shaking amplitude of the spiral cable 400 outside the range of the soundproof baffle 500 can be reduced. The relative position of the baffle 500 to the second telescoping member 210 is unchanged during extension or retraction of the drive assembly, thereby maintaining a blocking effect on the spiral cable 400.

The soundproof baffle 500 may be made of a material having vibration damping and noise reducing properties such as rubber.

The second wire fixing portion 310 may be connected between the two soundproof baffles 500, so that there is no need to provide a structure for mounting the second wire fixing portion 310 on the second telescopic member 210, and the first and second cables 410 and 420 are always partially located within the blocking range of the soundproof baffles 500, while retaining the blocking effect of the first and second cables 410 and 420. Of course, the second wire fixing portion and the soundproof baffle may be mounted to the second telescopic member, respectively.

The sound barrier 500 is provided along the length of the second telescopic member 210 to increase the protection against the first cable 410 and the second cable 420.

Since the cables in the inner tube 100 are more likely to collide, the barrier 500 may be disposed near the upper end of the second telescopic member 210 such that the length H1 of the first cable 410 in the blocking range of the barrier 500 is greater than the length H2 of the second cable 420 in the blocking range of the barrier 500, so as to increase the protection effect on the first cable 410.

The sound insulation baffle can also be arranged to stretch and retract along with the stretching of the transmission assembly, and the telescopic sound insulation baffle can stretch after the stretching of the transmission assembly, so that the blocking effect on the spiral cable is enlarged, and the blocking effect on the spiral cable is prevented from being weakened due to the stretching of the spiral cable.

Referring to fig. 12, unlike the above-described embodiment, in another embodiment of the present utility model, a routing cavity 401 in which the spiral cable 400 is disposed is formed between the outer circumference of the transmission assembly and the sleeve assembly, the transmission assembly is located in the accommodating space 402 of the spiral cable 400, so that the spiral cable 400 is wound around the transmission assembly, and the transmission assembly can radially position the spiral cable 400, thereby reducing the shaking amplitude of the spiral cable 400, and simultaneously, the spiral cable 400 is disposed at the outer circumference of the transmission assembly, so that the space required for disposing the spiral cable 400 can be reduced, thereby reducing the volume of the lifting column.

Referring to fig. 3 and 5 to 8, in an embodiment of the present utility model, in order to avoid the separation of the spiral cable 400 from the first fixing line portion 300 and the third fixing line portion 320 during the expansion and contraction process, the first fixing line portion 300 includes the first line card 302, the third fixing line portion 320 includes the second line card 331, and the basic structures of the first line card 302 and the second line card 331 are the same, and for convenience of description, the structure of the second line card 331 is described in this embodiment. The second wire clip 331 has an opening 330, so that one end of the spiral cable 400 can be snapped into the second wire clip 331 through the opening 330, and the other end of the spiral cable 400 can also be snapped into the first wire clip 302, so that both ends of the spiral cable 400 are fixed and movable along with the movement of the first wire fixing portion 300 and the third wire fixing portion 320, and the spiral cable 400 can stretch and retract to maintain the power transmission.

The spiral cable 400 is provided with a positioning protrusion 430 protruding in the radial direction of the spiral cable 400, the second line clamp 331 is provided with a positioning clamping groove 332 corresponding to the positioning protrusion 430, the positioning protrusion 430 is matched with the positioning clamping groove 332 in the process that the spiral cable 400 is clamped into the second line clamp 331 so as to position the spiral cable 400 in the stretching direction of the transmission assembly, inner walls on two sides of the positioning clamping groove 332 have a stopping effect on the positioning protrusion 430 in the stretching direction of the transmission assembly, the two sides of the positioning clamping groove 332 can keep the matched state of the two sides in the stretching direction of the transmission assembly, two ends of the spiral cable 400 cannot move relative to the first fixing line part 300 and the third fixing line part 320 in the stretching process respectively, and current supply can be maintained for electric equipment.

The positioning bulge can also be arranged on the line clamp, and the positioning clamping groove is arranged on the spiral line cable.

The second line card 331 is last to be equipped with the locating hole 333 of intercommunication opening 330, and spiral cable 400 is radial movable in order to block into locating hole 333 through opening 330, and is little to the damage of spiral cable 400, and also is convenient for the separation of spiral cable 400 and second line card 331, and the opening 330 inner wall is equipped with the backstop arch 334 that is used for radial backstop spiral cable 400, and backstop arch 334 can radially backstop spiral cable 400 in order to keep spiral cable 400 in locating hole 333, makes spiral cable 400 can not appear radial activity and the separation of second line card 331 along with the flexible of transmission assembly.

The first fixing wire portion 300 is connected to the driving device 230, the second fixing wire portion 310 is connected to the outer sleeve, and the third fixing wire portion 320 is connected to an end of the outer tube 110.

Referring to fig. 3, 5 to 9, in an embodiment of the present utility model, the lower end of the sleeve assembly is further provided with a first power interface 600, one end of the spiral cable 400 is electrically connected with the first power interface 600, the other end of the spiral cable 400 is electrically connected with the driver, the lifting column further comprises a junction box 610, the first power interface 600 and the spiral cable 400 are electrically connected on the junction box 610, the junction box 610 can hide the part where the spiral cable 400 is electrically connected with the first power interface 600, the junction terminals of the two can be isolated from the transmission assembly and the sleeve assembly, the junction terminal of the spiral cable 400 and the junction terminal of the first power interface 600 cannot contact the transmission assembly or the sleeve assembly, the situation that current is transferred to the transmission assembly or the sleeve assembly to cause electric leakage and spark is avoided, and potential safety hazards of the lifting column are reduced.

The position of the first power interface 600 does not change relative to the ground along with the extension and retraction of the sleeve assembly, so that the position of the power line connected with the power grid is not changed.

Junction box 610 includes box body 620 and wiring cavity 630 formed by box body 620, and the position that spiral cable 400 and first power interface 600 electricity are connected is hidden in wiring cavity 630, and spiral cable 400 and first power interface 600 carry out the electricity with the first power interface and are connected, and wiring cavity 630 is hidden in the position that both electricity are connected, can avoid contacting with transmission assembly or sleeve pipe subassembly, even in the flexible in-process of sleeve pipe subassembly spiral cable 400 and first power interface 600's electric connection position appearance change, also just rocks in wiring cavity 630, can not touch transmission assembly or sleeve pipe subassembly by mistake.

Referring to fig. 4, in an embodiment of the present utility model, the driving device 230 is further configured with a second power interface 601 based on the above embodiment. The second power interface 601 may be electrically connected to a controller of the electric table, or connected to an external circuit, or electrically connected to another lifting column.

Referring to fig. 7 to 9, in an embodiment of the present utility model, the second wire clip 331 of the outer tube 110 is mounted on the junction box 610, and the first mounting hole 640 for mounting the second wire clip 331 is provided on the box body 620, and the first mounting hole 640 communicates with the junction cavity 630. The spiral cable 400 can extend into the junction cavity 630 through the first assembly hole 640 after being matched with the second line card 331, so that the connection between the spiral cable 400 and the junction box 610 is facilitated. The line clip can also be integrally formed on the box body.

The box 620 is further provided with a second assembly hole 650 for installing the first power interface 600, the second assembly hole 650 is communicated with the wiring cavity 630, one side of the first power interface 600 extending into the wiring cavity 630 is provided with a binding post 660 for electrically connecting the spiral cable 400, and the other side of the first power interface 600 is provided with a socket hole 670. The first power interface 600 is installed at the second assembly hole 650 such that the connection post 660 can be inserted into the connection chamber 630 through the second assembly hole 650, and the first power interface 600 is installed on the connection box 610 to be able to be kept fixed with the connection box 610 such that the connection post 660 can be kept in the connection chamber 630, preventing the portion of the spiral cable 400 electrically connected to the connection post 660 from contacting the transmission assembly or the sleeve assembly.

Referring to fig. 3, 5 and 6, in one embodiment of the present utility model, the junction box 610 further includes a pre-positioning member 680, the pre-positioning member 680 is sleeved on the transmission assembly for positioning the junction box 610 circumferentially, the pre-positioning member 680 is a square tube, and the junction box 610 is limited by rotation after being matched with the transmission assembly, so as to avoid the influence of the deviation of the junction box 610 on the assembly of the lifting upright post.

The bottom of outer tube 110 opens the setting, the terminal box 610 locates the bottom of outer tube 110, lift stand still includes fixed plate 130, fixed plate 130 and terminal box 610, transmission assembly and sleeve pipe subassembly fixed connection, fixed plate 130 can connect transmission assembly and sleeve pipe subassembly, so that transmission assembly's partial structure links to each other with the partial structure of sleeve pipe subassembly, thereby transmission assembly can drive sleeve pipe subassembly flexible, fixed plate 130 installs terminal box 610 on the sleeve pipe subassembly simultaneously, the spare part that can reduce the assembly terminal box 610 needs, reduce the assembly step, and under the effect of pre-positioning piece 680, terminal box 610 can keep in the position of installation in advance, and the position change can not appear in the fixed plate 130 installation again.

In performing the installation of the fixing plate 130, a plurality of screws pass through the fixing plate 130 to be fixedly connected with the junction box 610, the transmission assembly and the outer tube 110, respectively. The pre-positioning members 680 may align screw holes on the junction box 610 with screw holes of the fixation plate 130.

Referring to fig. 3 and 10, in an embodiment of the present utility model, the second telescopic member 210 is an outer sleeve with a first transmission nut 250, the first telescopic member 200 is a first screw rod, the third telescopic member 220 is an inner sleeve with a second transmission nut 260, the transmission assembly further includes a second screw rod 240 sleeved outside the first screw rod, the first screw rod can drive the second screw rod to rotate synchronously and can axially and relatively stretch with the second screw rod 240, the inner sleeve is arranged in the outer sleeve, the second screw rod 240 and the first screw rod are arranged in the inner sleeve, the first screw rod is in threaded fit with the first transmission nut 250, and the second screw rod 240 is in threaded fit with the second transmission nut 260.

The first screw rod is in threaded fit with the first transmission nut 250 to stretch and retract relative to the outer sleeve and the second screw rod 240 in the rotating process, the second screw rod 240 is driven to rotate by the first screw rod in the rotating process, and the second screw rod is in threaded fit with the second transmission nut 260 to drive the inner sleeve to stretch and retract relative to the outer sleeve.

The driving device 230 is used for driving the first screw rod to rotate, the first screw rod is in threaded fit with the first transmission nut 250 to stretch out and draw back relative to the outer sleeve and the second screw rod 240 in the rotating process, the second screw rod 240 is driven by the first screw rod to rotate in the rotating process, and the second screw rod is in threaded fit with the second transmission nut 260 to drive the inner sleeve to stretch out and draw back relative to the outer sleeve.

The utility model also discloses an electric table, which comprises a table plate, wherein the table plate is provided with a controller, the bottom of the table plate is provided with two lifting upright posts, one lifting upright post is the lifting upright post disclosed in any embodiment, the spiral cable is electrically connected with the controller, and the controller is respectively electrically connected with driving devices in the two lifting upright posts.

Some electric equipment can be placed on the desk, and because the spiral cable is hidden in the lifting upright post, the power line of the electric equipment on the desk and the external spiral cable are not mutually wound, so that the power line and the external spiral cable are pulled in the lifting process of the desk.

Under the effect of terminal box, the condition of electric leakage can not appear in the lift stand to avoid the user to electrocute, the helix cable also can not lead to providing the voltage inadequately of driver because of electric leakage, influences the lift of table.

While the utility model has been described in terms of embodiments, it will be appreciated by those skilled in the art that the utility model is not limited thereto but rather includes the drawings and the description of the embodiments above. Any modifications which do not depart from the functional and structural principles of the present utility model are intended to be included within the scope of the appended claims.

Claims (18)

1. The lifting stand column comprises a sleeve component, a transmission assembly for driving the sleeve component to stretch out and draw back and a spiral cable axially penetrating through the sleeve component, and is characterized by further comprising a first wire fixing part, a second wire fixing part and a third wire fixing part which are sequentially connected onto the spiral cable along the axial direction of the spiral cable, wherein the first wire fixing part and the second wire fixing part generate axial relative displacement along with the stretching motion of the transmission assembly so as to stretch or shrink the spiral cable between the two parts, and the second wire fixing part and the third wire fixing part generate axial relative displacement along with the stretching motion of the transmission assembly so as to stretch or shrink the spiral cable between the two parts.

2. The lifting column of claim 1, wherein the drive assembly comprises first, second and third telescoping members that are relatively telescoping, the first and second wire fixing portions being axially displaced relative to each other as the first and second telescoping members are relatively telescoping, and the second and third wire fixing portions being axially displaced relative to each other as the second and third telescoping members are relatively telescoping.

3. The lifting column according to claim 2, wherein the first telescopic component is a first screw rod, the second telescopic component is an outer sleeve with a first transmission nut, the third telescopic component is an inner sleeve with a second transmission nut, the outer sleeve is sleeved outside the inner sleeve, the transmission assembly further comprises a second screw rod sleeved outside the first screw rod, the first screw rod can drive the second screw rod to synchronously rotate and can axially and relatively stretch and retract with the second screw rod, the first screw rod is in threaded fit with the first transmission nut, and the second screw rod is in threaded fit with the second transmission nut.

4. A lifting column according to claim 3, further comprising a drive means for driving the first screw into rotation, the first wire fixing portion being mounted on the drive means, the second wire fixing portion being mounted on the outer sleeve, and the third wire fixing portion being mounted on the sleeve assembly.

5. The lifting column of claim 1, wherein the side of the spiral cable is provided with a sound barrier.

6. The lifting column according to claim 5, wherein the sleeve assembly comprises an inner tube, a middle tube and an outer tube from inside to outside in sequence, the cross-sectional area of the sleeve assembly in an elongated state is gradually increased along the arrangement direction of the first wire fixing portion, the second wire fixing portion and the third wire fixing portion, the length of the spiral wire between the first wire fixing portion and the second wire fixing portion in the baffle blocking range is H1, and the length of the spiral wire between the second wire fixing portion and the third wire fixing portion in the baffle blocking range is H2, and the H1 is greater than the H2.

7. The lift column of claim 5, wherein the second wire fixing portion is mounted on the soundproof baffle.

8. The lift column of claim 5, wherein the sound barrier is retractable with retraction of the drive assembly.

9. The lifting column of claim 1, wherein the spiral cable is disposed side-by-side with the drive assembly, the first and/or second wire fixing portions including guide posts extending into the sleeve assembly, at least a portion of the spiral cable being wound around the guide posts.

10. The lifting column of claim 1, wherein the spiral cable encloses a receiving space that accommodates the drive assembly.

11. The lifting column of any one of claims 1 to 10, wherein the drive assembly transmits force to the spiral cable through the second wire fixing portion when performing telescopic movement.

12. The lifting column of claim 11, wherein the second wire fixing portion is fixedly connected to the spiral wire; alternatively, the second wire fixing portion is axially positioned on the spiral wire.

13. The lifting column according to any one of claims 1 to 10, wherein the sleeve assembly comprises an inner tube, a middle tube and an outer tube in this order from inside to outside, the sleeve assembly in an elongated state having a cross-sectional area that increases stepwise along the direction in which the first, second and third wire fixing portions are disposed, and a spiral cable length between the first and second wire fixing portions is smaller than a spiral cable length between the second and third wire fixing portions.

14. The lifting column according to any one of claims 1 to 10, wherein an integrated spiral cable is connected between the first and third wire fixing portions.

15. The lifting column according to any one of claims 1 to 10, wherein the spiral cable comprises a first cable and a second cable provided separately from the first cable, the first cable being connected between the first and second wire fixing portions, the second cable being connected between the second and third wire fixing portions, the first and second cables being electrically connected.

16. The lifting column of claim 15, wherein the second wire fixing portion includes a clamping portion for clamping a first wire and a second wire, respectively, the first wire and the second wire being connected to establish an electrical connection therebetween; or, the second wire fixing part comprises a conductive module, and the first cable and the second cable are respectively connected to the conductive module to establish electrical connection between the two.

17. The lifting column according to any one of claims 1 to 10, wherein the first wire fixing portion comprises a first wire clip, the third wire fixing portion comprises a second wire clip, and the first wire clip and the second wire clip axially position two ends of the spiral cable respectively.

18. An electric lifting table, comprising a table board and the lifting column according to any one of claims 1 to 17, wherein a controller is arranged on the table board, and the spiral cable is electrically connected to the controller.