Lifting stand column with internal wiring function

Abstract

The utility model provides a lifting stand column with internal wiring, which comprises a telescopic sleeve, an actuator, a spring cable and a guide rod, the actuator, the spring cable and the guide rod are vertically arranged in the telescopic sleeve, the guide rod is positioned beside the actuator, the spring cable and the guide rod are coaxial, and the spring cable is partially sleeved or wound outside the guide rod. A cable in the spring cable is used for electrically connecting the lifting upright post; when the telescopic sleeve stretches out and draws back, the spring cable stretches out and draws back correspondingly, and stretching out and drawing back of the spring cable are guided by the guide rod. The spring cable can be used for protecting the cable and is beneficial to management of the cable in the lifting stand column, so that the lifting stand column is tidier and safer; and the guide rod guides the extension and retraction of the spring cable, so that on one hand, the spring cable is more stable and safer during extension and retraction, and on the other hand, noise generated when the spring cable impacts the telescopic sleeve or the actuator can be avoided and reduced.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a lifting column with internal wiring. Background Art

[0002] In order to adapt to the development of science and technology and the needs of humanized design concepts, electrical appliances have become an indispensable part of people's work, life and even entertainment. As more and more electrical appliances are used, more and more wires are used. If the cables are not properly managed, they will not only look messy, but also affect the use of electrical equipment, and may even cause safety hazards, burn the lines and cause fires.

[0003] Lift tables are very common in daily life. With the upgrading of technology and the enhancement of humanized design awareness, some existing lift tables not only have the function of electrically adjusting the height of the tabletop, but also can be equipped with sockets on the table columns to facilitate users to use some electrical equipment. However, exposing the cables directly to the outside of the table body not only makes it messy and difficult to organize, causing inconvenience in electricity use, but also the exposed wires are easily damaged, affecting the service life of the cables and even causing safety hazards. Therefore, placing the cables inside the table body has become a hot spot in the current structural design of lift tables.

[0004] The cables are set inside the table pillars, which can make the cables of the entire table neat and beautiful. When the cables are set inside the table pillars, the length of the cables must be greater than the longest length of the table pillars. When the table pillars are in a shorter length state, the cables will bend, making multiple cables messy and likely to be entangled, thus causing problems. At the same time, when the table pillars are rapidly shortened, the cables will bend and hit the pillars or actuators, generating noise. Summary of the invention

[0005] In order to solve the above-mentioned technical problems, the utility model provides a lifting column with internal wiring, including a telescopic sleeve and an actuator, a spring cable and a guide rod vertically arranged in the telescopic sleeve, the guide rod being located beside the actuator, the spring cable being coaxial with the guide rod and the spring cable being partially sleeved or wound outside the guide rod, and the cable in the spring cable being used for the electrical connection of the lifting column; when the telescopic sleeve is extended or retracted, the spring cable is correspondingly extended or retracted, and the extension and retraction of the spring cable is guided by the guide rod; on the one hand, the spring cable can be used to protect the cable, and on the other hand, it is conducive to the management of the cables inside the lifting column, which is neater and safer; and the guide rod guides the extension and retraction of the spring cable, which on the one hand makes the spring cable more stable and safer when extending and retracting, and on the other hand, it can avoid and reduce the noise generated by the spring cable hitting the telescopic sleeve or the actuator.

[0006] The technical solution of the utility model is achieved in this way:

[0007] A lifting column with internal wiring comprises a telescopic sleeve, an actuator, a spring cable and a guide rod, wherein the actuator is vertically arranged in the telescopic sleeve, and the actuator is configured to drive the telescopic sleeve to telescope; the guide rod is vertically arranged in the telescopic sleeve, and the guide rod is located beside the actuator; the spring cable is vertically arranged in the telescopic sleeve and partially sleeved or wound outside the guide rod, and at least one cable is arranged in the spring cable, and the cable extends from both ends of the spring cable and is configured to be used for electrical connection of the lifting column; the spring cable and the guide rod are configured such that when the telescopic sleeve is extended, the spring cable is extended by the guide rod, and when the telescopic sleeve is shortened, the spring cable is shortened by the guide rod.

[0008] There is a spring cable on the outside of the cable, which protects the cable to prevent the cable surface from aging and direct damage due to lifting and lowering movements. At the same time, when there are multiple cables, the spring cable has the function of integrating multiple cables so that the multiple cables will not be scattered in the column; therefore, it not only plays a protective role but also has the function of cable management, making the wiring of the entire table more concise.

[0009] In terms of noise, when the spring cable is arranged separately in the telescopic sleeve, the spring cable will shake due to its rapid shortening, so the spring cable will hit the telescopic sleeve and generate noise; when a pipe fitting is arranged outside the spring cable, the pipe fitting will also be hit. The spring cable in this solution is sleeved or wrapped around the outside of the guide rod, which can avoid the possibility of knocking with the external pipe fitting. At the same time, the guide rod can prevent or reduce the shaking of the spring cable when it is extended and retracted, and will not knock on the telescopic sleeve. It is a more reasonable structure.

[0010] The advantage of using the guide rod is that it saves material and the friction surface between the guide rod and the spring cable is smaller.

[0011] The difference between a spring cable being sheathed outside the guide rod and a spring cable being wrapped around the guide rod is whether there is a gap between the spring cable and the guide rod. If there is a gap between the spring cable and the guide rod, it is sheathed. When the spring cable is sheathed outside the guide rod, it is difficult to avoid slight shaking of the spring cable. When the spring cable is wrapped around the guide rod, the spring cable will be subjected to additional pressure from the guide rod when it stretches. As the spring cable stretches, its inner diameter will also decrease. When the spring cable is wrapped around the guide rod, it will become tighter and tighter when it stretches. Although the spring cable is elastic and will not cause constraints that prevent it from moving, the pressure and friction between the guide rod and the spring cable will increase, which will affect the smoothness of the movement of the lifting column and the service life of the spring cable.

[0012] Preferably, the length of the guide rod is greater than half of the minimum length of the spring cable. When the spring cable is shortened to the shortest, the lower end of the guide rod is located below the middle of the spring cable, and only a small part of the spring cable is not sheathed or wrapped outside the guide rod; when the telescopic sleeve is extended to the longest, only a small part of the spring cable is outside the guide rod, but as the telescopic sleeve and the spring cable are shortened, the spring cable has a larger and larger swing margin, and the diameter of the spring cable is also larger and larger. When the possibility of knocking increases, more and more parts of the spring cable will be outside the guide rod, and correspondingly, the part of the spring cable that can shake is getting smaller and smaller, so that it is difficult for the spring cable to shake and knock the telescopic sleeve.

[0013] Preferably, the guide rod extends downward from the upper end of the telescopic sleeve or extends upward from the lower end of the telescopic sleeve. The above effect can be achieved when the guide rod is located at the upper or lower end.

[0014] Preferably, the spring cable is an elastic spiral cable. When the telescopic sleeve is extended, the spring cable is stretched and expanded. When the telescopic sleeve is shortened, the spring cable is retracted and restored to its original shape. When the elastic spiral cable is extended, not only the length changes, but also the diameter changes. The diameter becomes smaller when extended and becomes larger when shortened. The elastic spiral cable can be extended and retracted more stably by cooperating with the guide rod.

[0015] Preferably, an external interface electrically connected to the spring cable is provided on the lower end surface of the telescopic sleeve. The external interface is provided on the lower end surface of the telescopic sleeve. Since the lower end of the telescopic sleeve will be connected to the table legs of the lifting table, the external interface is a hidden external interface that cannot be seen by the user, making the entire table more beautiful; compared with the external interface being located on the side of the telescopic sleeve, when it is located on the lower end surface of the telescopic sleeve, it is prevented from being kicked away accidentally.

[0016] Preferably, an electrical component is provided inside the lower end of the telescopic sleeve, and the external interface is provided on the electrical component and exposed downwardly from the lower end surface of the telescopic sleeve; the electrical component includes a housing, a protective switch and the external interface are provided inside the housing, the external interface protrudes downwardly from the housing, and a spring cable is connected to the external interface inside the housing; the protective switch includes a button, and the button selectively protrudes from the surface of the telescopic sleeve. The protective switch is an air switch, and its button can turn off or on the air switch, and the button can protrude from the side of the telescopic sleeve, making it more convenient to use and increasing safety.

[0017] Preferably, the external interface is a power interface and / or a signal line interface. When the external interface is a power interface, the external interface is electrically connected to the external power supply of the lifting table; when the external interface is a signal line interface, the external interface is electrically connected to the external network cable and other signal lines of the lifting table; there is not only one external interface, so it can have both a power interface and a signal line interface; this means that the cable in the spring cable can be a power line, a signal line such as a network cable, or both.

[0018] Preferably, one end of the actuator is in contact with the electrical component, and the telescopic sleeve, the electrical component and the actuator are connected by screws. The screws are long screws, which install the electrical component and the actuator on the telescopic sleeve together, simplifying the installation steps.

[0019] Preferably, at least one enclosure is further provided in the telescopic sleeve, and the enclosure is sleeved outside the spring cable, and the enclosure and the guide rod are relatively movable, and the enclosure is configured to guide the spring cable to extend and retract outside the spring cable; when the telescopic sleeve is extended, the enclosure and the guide rod are separated, and when the telescopic sleeve is shortened, the enclosure and the guide rod are close. The enclosure guides the extension and retraction of the spring cable outside the spring cable, and because the enclosure and the guide rod are relatively movable, the guiding effect of the guide rod is weakened after the spring cable is extended, and the enclosure can just make up for this problem, acting on the part of the spring cable that the guide rod cannot act on, thereby achieving more comprehensive and stable guidance.

[0020] Preferably, the guide rod is arranged at the upper end of the telescopic sleeve and extends downward; the actuator comprises a screw rod and a push rod housing, the screw rod and the upper end of the telescopic sleeve move synchronously, the push rod housing is fixedly connected to the lower end of the telescopic sleeve, and the enclosure is installed on the push rod housing. When the telescopic sleeve is extended and retracted, the push rod housing and the lower end of the telescopic sleeve remain stationary, and the screw rod drives the upper end of the telescopic sleeve to move, so that when the spring cable is extended, the guide rod and the enclosure are respectively located at the two ends of the spring cable, achieving a better and more comprehensive guiding effect.

[0021] Preferably, the enclosure is C-shaped, and includes two curved and symmetrical baffles connected to the baffles with clamps, which are connected by screws and hold the push rod housing tightly; the two baffles are attached to each other by the connection of the two clamps. The advantage of the enclosure being C-shaped is that it is convenient to install the enclosure and the spring cable, and it is also convenient to set the felt inside the enclosure; the two baffles are connected by two clamps to form the enclosure, which further facilitates the installation of the enclosure and the spring cable.

[0022] Preferably, there are two enclosure members, which are spaced apart on the push rod housing. Increasing the number of enclosure members can cover more ranges of the spring cables, thereby improving the guiding effect, increasing the stability of the elastic cable expansion and contraction, and preventing noise.

[0023] Preferably, the vertical length of the enclosure is 4-8 cm. The enclosure is smaller, has less consumables and lower cost than the whole tube, and can make up for the problem of insufficient guiding effect through quantity.

[0024] Preferably, the inner wall of the enclosure is provided with felt. In order to prevent the spring cable from hitting the inner wall of the enclosure and generating noise, the felt is arranged inside the enclosure to increase the buffer and reduce the noise.

[0025] Preferably, a motor box is provided on the telescopic sleeve, a motor is provided in the motor box, and the motor is configured to drive the actuator to move; a wire collection box is provided below the motor box, and the spring cable has a first straight line segment at the end of the motor box and the wire collection box, the first straight line segment faces the wire collection box, and the cable enters the wire collection box. The cables are gathered in the wire collection box to prevent the cables from appearing on the outer surface of the lifting column, which is neat and safe.

[0026] Preferably, the junction box is provided with a connection port, which is located on the end surface of the junction box facing away from the telescopic sleeve. The connection port faces the middle of the lifting table, which is more beautiful than being set on the side and will not be exposed; it is more conducive to plugging and unplugging the connection line in the case of a wire groove, which is more ergonomic.

[0027] Preferably, a junction box is provided with a splitter, and the splitter is configured to be electrically connected to the control panel and the controller. When the cable is a power cable, the ground wire in the power cable is connected to the housing of the lifting column, such as a motor box, a junction box or a telescopic sleeve, and the neutral wire and the live wire in the power cable are connected to the splitter, and the splitter separates two groups of neutral wires and live wires, so that the two groups of neutral wires and live wires are electrically connected to the control panel and the controller respectively, so as to supply power to the controller and the control panel.

[0028] Preferably, a plurality of connection holes for expansion are provided on the lower end surface of the junction box, for example, it can be used to hang expansion components such as computer cases.

[0029] Preferably, an anti-pullout structure is provided at the end of the telescopic sleeve away from the guide rod, the anti-pullout structure comprising two spaced limiting bosses and a limiting portion located between the two limiting bosses, and the anti-pullout structure is configured to lengthen the spring cable when the telescopic sleeve is extended. The anti-pullout structure can not only lengthen the spring cable when the telescopic sleeve is extended, but also limit the spring cable to prevent the spring cable from being out of synchronous extension with the telescopic sleeve.

[0030] Preferably, the spring cable has a second straight section at the anti-pulling structure, and the limiting boss is arranged on the second straight section; the limiting part is arranged on a locking member, and the locking member half surrounds the lower end of the actuator and is connected to the lower end of the actuator by screws; a window is also provided on the locking member, and the upper end of the second straight section is located at the window, and the window is configured so that the ring at the lower end of the spring cable is clamped in the window; a slot recessed in the horizontal direction is also provided on the locking member above the window, and the spring cable is clamped in the slot. The limiting boss and the limiting part of the anti-pulling structure can limit the spring cable, and the window and the slot on the locking member can further provide an auxiliary limiting function to prevent the spring cable from being subjected to force concentration.

[0031] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0032] There is a spring cable on the outside of the cable, which protects the cable to prevent the cable surface from aging and direct damage due to lifting and lowering movements. At the same time, when there are multiple cables, the spring cable has the function of integrating multiple cables so that the multiple cables will not be scattered in the column; therefore, it not only plays a protective role but also has the function of cable management, making the wiring of the entire table more concise.

[0033] In terms of noise, when the spring cable is arranged separately in the telescopic sleeve, the spring cable will shake due to its rapid shortening, so the spring cable will hit the telescopic sleeve and generate noise; when a pipe fitting is arranged outside the spring cable, the pipe fitting will also be hit. The spring cable in this solution is sleeved or wrapped around the outside of the guide rod, which can avoid the possibility of knocking with the external pipe fitting. At the same time, the guide rod can prevent or reduce the shaking of the spring cable when it is extended and retracted, and will not knock on the telescopic sleeve. It is a more reasonable structure.

[0034] The advantage of using the guide rod is that it saves material and the friction surface between the guide rod and the spring cable is smaller.

[0035] The difference between a spring cable being sheathed outside the guide rod and a spring cable being wrapped around the guide rod is whether there is a gap between the spring cable and the guide rod. If there is a gap between the spring cable and the guide rod, it is sheathed. When the spring cable is sheathed outside the guide rod, it is difficult to avoid slight shaking of the spring cable. When the spring cable is wrapped around the guide rod, the spring cable will be subjected to additional pressure from the guide rod when it stretches. As the spring cable stretches, its inner diameter will also decrease. When the spring cable is wrapped around the guide rod, it will become tighter and tighter when it stretches. Although the spring cable is elastic and will not cause constraints that prevent it from moving, the pressure and friction between the guide rod and the spring cable will increase, which will affect the smoothness of the movement of the lifting column and the service life of the spring cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1The three-dimensional structure of the lifting column in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0037] Figure 2 The three-dimensional structure of the lifting column in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0038] Figure 3 This is a schematic diagram of the three-dimensional structure of the spring cable and the actuator inside the telescopic sleeve in the embodiment of the utility model;

[0039] Figure 4 It is a schematic diagram of the three-dimensional structure of the guide rod and the enclosure member inside the telescopic sleeve in the embodiment of the utility model;

[0040] Figure 5 The three-dimensional structure of the spring cable in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0041] Figure 6 The three-dimensional structure of the spring cable in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0042] Figure 7 This is a schematic diagram of the three-dimensional structure inside the motor box in the embodiment of the utility model;

[0043] Figure 8 It is a three-dimensional structural schematic diagram of the electrical components in the embodiment of the utility model;

[0044] Fig. 9 This is a three-dimensional structural diagram of the external interface and the protection switch inside the electrical component in the embodiment of the utility model;

[0045] Fig.10 This is a three-dimensional structural diagram of the internal connection port and the splitter of the junction box in the embodiment of the utility model;

[0046] Fig.11 It is a schematic diagram of the three-dimensional structure of the limiting plate in the embodiment of the utility model;

[0047] Fig.12 This is a schematic diagram of a three-dimensional structure in which a locking member is installed on a push rod housing in an embodiment of the utility model;

[0048] Fig.13 It is a three-dimensional structural schematic diagram of the locking member in the embodiment of the utility model;

[0049] Fig.14 A length comparison diagram of a spring cable and a guide rod in an embodiment of the present utility model;

[0050] Fig.15 It is a schematic diagram of the three-dimensional structure of the enclosure member in the embodiment of the utility model.

[0051] The figures are marked as follows: telescopic sleeve 1; actuator 2; spring cable 3; first straight segment 31; second straight segment 32; guide rod 4; cable 5; motor box 6; motor 7; electrical component 8; housing 81; protection switch 82; external interface 83; button 84; connection port 9; junction box 10; splitter 11; limit plate 12; opening 13; first limit groove 14; limit seat 15; second limit groove 16; limit boss 17; limit portion 18; locking member 19; window 20; slot 21; enclosure 23; baffle 24; clamping member 25; connection hole 26. Implementation

[0052] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0054] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0055] The specific implementation of the utility model is as follows:

[0056] like Figure 1-4 As shown, the utility model provides a lifting column with internal wiring, including a telescopic sleeve 1, an actuator 2, a spring cable 3 and a guide rod 4, the actuator 2 is vertically arranged in the telescopic sleeve 1, and the actuator 2 is configured to drive the telescopic sleeve 1 to telescope; the guide rod 4 is vertically arranged in the telescopic sleeve 1, and the guide rod 4 is located beside the actuator 2; the spring cable 3 is vertically arranged in the telescopic sleeve 1 and partially sleeved or wound outside the guide rod 4, at least one cable 5 is provided in the spring cable 3, and the cable 5 extends from both ends of the spring cable 3 and is configured to be used for electrical connection of the lifting column; the spring cable 3 and the guide rod 4 are configured so that when the telescopic sleeve 1 is extended, the spring cable 3 is extended by the guide rod 4, and when the telescopic sleeve 1 is shortened, the spring cable 3 is shortened by the guide rod 4.

[0057] A spring cable 3 is provided on the outside of the cable 5, which protects the cable 5 to prevent the surface of the cable 5 from aging and direct damage due to lifting and lowering movements. At the same time, when there are multiple cables 5, the spring cable 3 has the function of integrating the multiple cables 5 so that the multiple cables 5 will not be scattered in a disorderly manner in the column; therefore, it not only plays a protective role but also has the function of cable management, making the wiring of the entire table more concise.

[0058] In terms of noise, when the spring cable 3 is arranged alone in the telescopic sleeve 1, the spring cable 3 will shake due to its rapid shortening, so the spring cable 3 will hit the telescopic sleeve 1 and generate noise; when a pipe fitting is arranged outside the spring cable 3, the pipe fitting will also be hit. The spring cable 3 in this solution is sleeved or wrapped around the guide rod 4, which can avoid the possibility of hitting the external pipe fitting. At the same time, the guide rod 4 can prevent or reduce the shaking of the spring cable 3 during extension and contraction, and will not hit the telescopic sleeve 1, which is a more reasonable structure.

[0059] The advantage of using the guide rod 4 is that it saves material and the friction surface between the guide rod 4 and the spring cable 3 is smaller.

[0060] The difference between the spring cable 3 being sheathed outside the guide rod 4 and the spring cable 3 being wound outside the guide rod 4 is whether there is a gap between the spring cable 3 and the guide rod 4. If there is a gap between the spring cable 3 and the guide rod 4, it is sheathed; when the spring cable 3 is sheathed outside the guide rod 4, it is difficult to avoid slight shaking of the spring cable 3, and when the spring cable 3 is wound outside the guide rod 4, the spring cable 3 will be subjected to additional pressure from the guide rod 4 when it is stretched; while the spring cable 3 is stretched, its inner diameter will also become smaller, and the spring cable 3 will be wound outside the guide rod 4, and will be wound tighter and tighter when stretched. Although the spring cable 3 is elastic and will not cause a constraint that cannot move, the pressure and friction generated between the guide rod 4 and the spring cable 3 will increase, which will affect the smoothness of the movement of the lifting column and the service life of the spring cable 3. In this embodiment, there is a gap between the spring cable 3 and the guide rod 4, and the spring cable 3 is sheathed outside the guide rod 4.

[0061] like Figure 5 , 6 As shown, the spring cable 3 is an elastic spiral cable. When the telescopic sleeve 1 is extended, the spring cable 3 is stretched and expanded. When the telescopic sleeve 1 is shortened, the spring cable 3 is recovered and restored to its original shape. When the elastic spiral cable is extended or retracted, not only the length but also the diameter of the elastic spiral cable will change. The diameter will become smaller when extended and larger when shortened. By cooperating with the guide rod 4, the extension and retraction of the elastic spiral cable will be more stable.

[0062] Specifically, if Figure 1 , 7-9, the lifting column also includes a motor box 6, which is arranged at the upper end of the telescopic sleeve 1, and a motor 7 is arranged in the motor box 6. The actuator 2 includes a screw and a push rod shell. The push rod shell is provided with a nut connected to the screw thread. The upper end of the screw is exposed from the push rod shell and is transmission-connected with the motor 7. The motor 7 is configured to drive the screw to rotate and make the actuator 2 telescopic movement; an electrical component 8 is arranged below the actuator 2, and the electrical component 8 includes a shell 81, and a protection switch 82 and an external interface 83 electrically connected to the spring cable 3 are arranged in the shell 81. The lower end of the push rod shell is in contact with the electrical component 8, and the telescopic sleeve 1, the electrical component 8 and the actuator 2 are connected by screws; the external interface 83 protrudes downward from the shell 81, the spring cable 3 is connected to the external interface 83 inside the shell 81, and the external interface 83 is exposed downward from the telescopic sleeve 1; when the external interface 83 is a power interface, the external interface 83 is electrically connected to the external power supply of the lifting table; when the external interface 83 is a signal line interface, the external interface 83 is electrically connected to the signal line such as the external network cable of the lifting table; there is not only one external interface 83, so it can have both a power interface and a signal line interface; this means that the cable 5 in the spring cable 3 can be a power line, or a signal line such as a network cable, or both can coexist; the external interface 83 is arranged on the lower end surface of the telescopic sleeve 1. Since the lower end of the telescopic sleeve 1 will be connected to the table leg of the lifting table, the external interface 83 is a hidden external interface 83, which cannot be seen by the user, making the whole table more beautiful; compared with the external interface 83 being located on the side of the telescopic sleeve 1, when it is located on the lower end surface of the telescopic sleeve 1, it is prevented from being kicked open accidentally.

[0063] Correspondingly, such as Figure 1 , 2 As shown in Figures 1 and 10, the lifting column also has a connection port 9 for electrically connecting the spring cable 3 to the inside of the lifting table. Specifically, a junction box 10 is provided below the motor box 6. The spring cable 3 has a first straight section 31 at the upper end. The first straight section 31 faces the junction box 10, and the cable 5 enters the junction box 10. The junction box 10 gathers the cables 5 to prevent the cables 5 from appearing on the surface of the lifting column, which is neat and safe. The connection port 9 is provided on the junction box 10. The connection port 9 is located on the end surface of the junction box 10 facing away from the telescopic sleeve 1, that is, the connection port 9 faces the middle of the lifting table, which is more beautiful than being provided on the side and will not be exposed. It is also more conducive to plugging and unplugging the connection cable in the case of a cable trough, which is more ergonomic. The type of the connection port 9 is the same as the type of the external interface 83. In this embodiment, the cable 5 is a power cord, the external interface 83 is a power interface, and the connection port 9 is also a power interface.

[0064] A junction box 10 is also provided with a splitter 11, which is configured to be electrically connected to the control panel and the controller; when the cable 5 is a power line, the ground wire in the power line is connected to the housing 81 of the lifting column, such as the motor box 6, the junction box 10 or the telescopic sleeve 1, and the neutral wire and the live wire in the power line are connected to the splitter 11, and the splitter 11 divides two groups of neutral wires and live wires, so that the two groups of neutral wires and live wires are electrically connected to the control panel and the controller respectively to supply power to the controller and the control panel; the lower end surface of the junction box 10 is provided with a plurality of connection holes 26 for expansion, such as for hanging expansion components such as computer cases. The above-mentioned protection switch 82 includes a button 84, and the button 84 selectively protrudes from the surface of the telescopic sleeve 1; the protection switch 82 is an air switch, and its button 84 can turn off or on the air switch, and the button 84 can protrude from the side of the telescopic sleeve 1, making it more convenient to use and improving safety.

[0065] like Figure 7 , 10 As shown in Figures 11, a limiting plate 12 is arranged in the motor box 6, an opening 13 is arranged at the bottom of the motor box 6, the spring cable 3 enters the motor box 6 from bottom to top through the opening 13, a first limiting groove 14 is arranged on the limiting plate 12, the spring cable 3 is inserted into the first limiting groove 14 after entering the motor box 6, and the first straight line segment 31 is exposed upward from the limiting plate 12; an upwardly extending limiting seat 15 is arranged on the limiting plate 12, a second limiting groove 16 is arranged on the limiting seat 15, two spaced limiting bosses 17 are arranged on the first straight line segment 31, the first straight line segment 31 enters the second limiting groove 16 and makes the limiting seat 15 located between the two limiting bosses 17.

[0066] Correspondingly, if Figure 3 , 4As shown in FIGS. 12 and 13, an anti-pullout structure is provided at the lower end of the actuator 2, and the anti-pullout structure includes two spaced limiting bosses 17 and a limiting portion 18 located between the two limiting bosses 17. The anti-pullout structure is configured to lengthen the telescopic cable 3 when the telescopic sleeve 1 is extended; the anti-pullout structure is used together with the above-mentioned limiting plate 12, which can not only lengthen the telescopic cable 3 when the telescopic sleeve 1 is extended, but also limit the telescopic cable 3 to prevent the telescopic cable 3 from being out of synchronous extension with the telescopic sleeve 1; further, the spring cable 3 has a second anti-pullout structure. Straight line segment 32, the limiting boss 17 is arranged on the second straight line segment 32; the limiting portion 18 is arranged on a locking piece 19, the locking piece 19 half surrounds the lower end of the actuator 2 and is connected to the lower end of the actuator 2 by screws; the locking piece 19 is also provided with a window 20, the upper end of the second straight line segment 32 is located at the window 20, and the window 20 is configured to allow the lowermost ring of the spring cable 3 to be clamped in the window 20; the locking piece 19 above the window 20 is also provided with a clamping groove 21 recessed in the horizontal direction, and the spring cable 3 is clamped in the clamping groove 21. The limiting boss 17 and the limiting portion 18 of the anti-pulling structure can limit the spring cable 3, and the window 20 and the clamping groove 21 on the locking piece 19 can further provide an auxiliary limiting function to prevent the spring cable 3 from being subjected to force concentration.

[0067] like Fig.14 As shown, in the present embodiment, the length of the guide rod 4 is greater than half of the minimum length of the spring cable 3; when the spring cable 3 is shortened to the shortest, the lower end of the guide rod 4 is located below the middle of the spring cable 3, and only a small part of the spring cable 3 is not sleeved or wrapped around the outside of the guide rod 4; when the telescopic sleeve 1 is extended to the longest, only a small part of the spring cable 3 is outside the guide rod 4, but as the telescopic sleeve 1 and the spring cable 3 are shortened, the swing margin of the spring cable 3 becomes larger and larger, and the diameter of the spring cable 3 becomes larger and larger. While the possibility of knocking becomes greater, since more and more parts of the spring cable 3 will be outside the guide rod 4, correspondingly, the part of the spring cable 3 that can shake becomes smaller and smaller, making it difficult for the spring cable 3 to shake and knock the telescopic sleeve 1.

[0068] Specifically, if Figure 3 , 4As shown in Figures 15, two enclosures 23 are further provided in the telescopic sleeve 1, and the two enclosures are arranged on the push rod shell at intervals. The enclosure 23 is sleeved on the outside of the spring cable 3, and the length of the enclosure 23 in the vertical direction is 4-8 cm. The inner wall of the enclosure 23 is provided with felt. In this embodiment, the length of the enclosure 23 is 5 cm; increasing the number of enclosures 23 can cover more ranges of the spring cables 3, thereby improving the guiding effect, increasing the stability of the elastic cable 3 in telescopic expansion and contraction, and preventing noise; in order to prevent the spring cable 3 from hitting the inner wall of the enclosure 23 and generating noise, felt is provided inside the enclosure 23 to increase buffering and reduce noise; the enclosure 23 is smaller, and compared with the whole tube, it consumes less materials and has lower cost, and can make up for the problem of insufficient guiding effect through quantity.

[0069] Furthermore, the enclosure 23 and the guide rod 4 are arranged to move relative to each other, and the enclosure 23 is configured to guide the extension and retraction of the spring cable 3 on the outside of the spring cable 3; when the telescopic sleeve 1 is extended, the enclosure 23 and the guide rod 4 are separated, and when the telescopic sleeve 1 is shortened, the enclosure 23 and the guide rod 4 are close to each other; specifically, the guide rod 4 is arranged at the upper end of the telescopic sleeve 1 and extends downward; the enclosure 23 is installed on the push rod shell, and the enclosure 23 is C-shaped, and the enclosure 23 includes two curved and symmetrical baffles 24, and the baffles 24 are connected with clamps 25, and the two clamps 25 are connected by screws and hold the push rod shell tightly; the two baffles 24 are attached to each other through the connection of the two clamps 25. The enclosure 23 guides the extension and contraction of the spring cable 3 on the outside of the spring cable 3. When the telescopic sleeve 3 is extended and contracted, the push rod shell and the lower end of the telescopic sleeve 1 remain stationary, and the screw rod drives the upper end of the telescopic sleeve 1 to move. Since the guiding effect of the guide rod 4 is weakened after the spring cable 3 is extended, the enclosure 23 can just make up for this problem and act on the part of the spring cable 3 that the guide rod 4 cannot act on, so that when the spring cable 3 is extended, the guide rod 4 and the enclosure 23 are respectively located at the two ends of the spring cable 3, achieving a better and more comprehensive guiding effect. The two clamps 25 are interference-fitted with the push rod shell, and there is a space for guidance between the two baffles 24 and the spring cable 3; the advantage of the C-shaped enclosure 23 is that it is convenient to install the enclosure 23 and the spring cable 3, and it is also convenient to set the felt in the enclosure 23; the two baffles 24 are connected by two clamps 25 to form the enclosure 23, which further facilitates the installation of the enclosure 23 and the spring cable 3.

Claims

1. A lifting column with internal wiring, characterized in that: The invention comprises a telescopic sleeve, an actuator, a spring cable and a guide rod, wherein the actuator is vertically arranged in the telescopic sleeve and is configured to drive the telescopic sleeve to move in a telescopic manner; The guide rod is vertically arranged in the telescopic sleeve, and the guide rod is located beside the actuator; the spring cable is vertically arranged in the telescopic sleeve and partially sleeved or wrapped around the guide rod, and at least one cable is arranged in the spring cable, and the cable extends from both ends of the spring cable and is configured to be used for electrical connection of the lifting column; the spring cable and the guide rod are configured so that when the telescopic sleeve is extended, the spring cable is extended by the guide rod, and when the telescopic sleeve is shortened, the spring cable is shortened by the guide rod.

2. The lifting column for internal wiring according to claim 1, characterized in that: The length of the guide rod is greater than half the minimum length of the spring cable.

3. The lifting column for internal wiring according to claim 1, characterized in that: The guide rod extends downward from the upper end of the telescopic sleeve or extends upward from the lower end of the telescopic sleeve.

4. The lifting column for internal wiring according to claim 1, characterized in that: The spring cable is an elastic spiral cable. When the telescopic sleeve is extended, the spring cable is stretched and expanded. When the telescopic sleeve is shortened, the spring cable is retracted and restored to its original shape.

5. The lifting column for internal wiring according to claim 1, characterized in that: An external interface electrically connected to the spring cable is provided on the lower end surface of the telescopic sleeve.

6. The lifting column for internal wiring according to claim 5, characterized in that: An electrical component is provided inside the lower end of the telescopic sleeve, and the external interface is provided on the electrical component and exposed downwardly from the lower end surface of the telescopic sleeve; The electrical component includes a housing, a protective switch and the external interface are arranged in the housing, the external interface protrudes downward from the housing, and a spring cable is connected to the external interface in the housing; The protection switch includes a button, which selectively protrudes from the surface of the telescopic sleeve.

7. The lifting column for internal wiring according to claim 5, characterized in that: The external interface is a power interface and / or a signal line interface.

8. The lifting column for internal wiring according to claim 5, characterized in that: One end of the actuator is in contact with the electrical component, and the telescopic sleeve, the electrical component and the actuator are connected by screws.

9. The lifting column for internal wiring according to claim 1, characterized in that: At least one enclosure is also provided in the telescopic sleeve. The enclosure is sleeved outside the spring cable. The enclosure and the guide rod are arranged to move relative to each other. The enclosure is configured to guide the spring cable to extend and retract on the outside of the spring cable. When the telescopic sleeve is extended, the enclosure moves away from the guide rod, and when the telescopic sleeve is shortened, the enclosure moves closer to the guide rod.

10. The lifting column for internal wiring according to claim 9, characterized in that: The guide rod is arranged at the upper end of the telescopic sleeve and extends downward; the actuator includes a screw rod and a push rod shell, the screw rod moves synchronously with the upper end of the telescopic sleeve, the push rod shell is fixedly connected to the lower end of the telescopic sleeve, and the enclosure is installed on the push rod shell.

11. The lifting column for internal wiring according to claim 10, characterized in that: The enclosure is C-shaped and includes two curved and symmetrical baffles, the baffles are connected with clamps, the two clamps are connected by screws and hold the push rod shell tightly; the two baffles are attached to each other through the connection of the two clamps.

12. The lifting column for internal wiring according to claim 9, characterized in that: There are two enclosure members, which are arranged on the push rod housing at intervals.

13. The lifting column for internal wiring according to claim 9, characterized in that: The vertical length of the enclosure is 4-8 cm.

14. The lifting column for internal wiring according to claim 9, characterized in that: The inner wall of the enclosure is provided with felt.

15. The lifting column for internal wiring according to claim 1, characterized in that: A motor box is provided on the telescopic sleeve, a motor is provided in the motor box, and the motor is configured to drive the actuator to move; A junction box is arranged below the motor box. The spring cable has a first straight line segment at the end of the motor box and the junction box. The first straight line segment faces the junction box, and the cable enters the junction box.

16. The lifting column for internal wiring according to claim 15, characterized in that: The junction box is provided with a connection port, which is located on the end surface of the junction box facing away from the telescopic sleeve.

17. The lifting column for internal wiring according to claim 15, characterized in that: A splitter is arranged in the junction box, and the splitter is configured to be electrically connected to the control panel and the controller.

18. The lifting column for internal wiring according to claim 15, characterized in that: A plurality of connection holes for expansion are provided on the lower end surface of the junction box.

19. The lifting column for internal wiring according to claim 1, characterized in that: An anti-pull structure is provided at the end of the telescopic sleeve away from the guide rod. The anti-pull structure includes two spaced limiting bosses and a limiting portion located between the two limiting bosses. The anti-pull structure is configured to lengthen the spring cable when the telescopic sleeve is extended.

20. The lifting column for internal wiring according to claim 19, characterized in that: The spring cable has a second straight section at the anti-pullout structure, and the limiting boss is arranged on the second straight section; the limiting part is arranged on a locking piece, and the locking piece half surrounds the lower end of the actuator and is connected to the lower end of the actuator by screws; a window is also provided on the locking piece, and the upper end of the second straight section is located at the window, and the window is configured so that the ring at the lower end of the spring cable is clamped in the window; a clamping groove recessed in the horizontal direction is also provided on the locking piece above the window, and the spring cable is clamped in the clamping groove.

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