Search

CN-121983902-A - Inner wiring lifting device and height-adjustable furniture

CN121983902ACN 121983902 ACN121983902 ACN 121983902ACN-121983902-A

Abstract

The invention discloses an inner wiring lifting device which comprises a telescopic assembly, a driving unit, at least one cable, a cable guiding device and a chain guiding device, wherein the telescopic assembly comprises at least two sleeved tubular components, the driving unit is used for driving the at least two tubular components to move relatively axially to adjust the telescopic assembly, the at least one cable penetrates through the telescopic assembly, the cable guiding device guides the cable to stretch in the telescopic assembly, the cable guiding device is provided with the chain guiding device and comprises a plurality of chain links which are axially arranged along the tubular components, the adjacent chain links are connected in a pivoting mode and can pivot relatively around pivot points, so that the chain guiding device can be folded or stretched cooperatively in the telescopic process of the telescopic assembly, and the cable is arranged on the chain guiding device and is folded or stretched in an attaching mode. The inner wiring lifting device can effectively reduce the volume of the lifting device, and effectively shorten the cable length under the condition of the same stretching length, so as to reduce the cost of cable materials, and simultaneously, the requirement on cables is lower. Height-adjustable furniture is also disclosed.

Inventors

  • WANG LIN
  • HU TAO
  • ZHU CHUANCHAO
  • LIU XIAOQIANG
  • LIANG HAOFENG
  • ZHANG GUI
  • GAO ZEFENG
  • WANG LU

Assignees

  • 浙江捷昌线性驱动科技股份有限公司

Dates

Publication Date
20260505
Application Date
20251225

Claims (19)

  1. 1. An internal routing lifting device, comprising: a telescoping assembly comprising at least two nested tubular members; a drive unit for driving the at least two tubular members to move axially relative to each other to adjust the telescopic assembly; At least one cable is arranged in the telescopic component in a penetrating way; A cable guide device for guiding the cable to be retracted inside the retraction assembly; the cable guiding device is characterized by being a chain guiding device, comprising a plurality of chain links which are axially arranged along the tubular component, wherein adjacent chain links are pivotally connected and can pivot relatively around a pivot point, so that the chain guiding device is cooperatively folded or stretched in the telescoping process of the telescoping assembly, and the cable is attached to the chain guiding device and is adaptively folded or stretched.
  2. 2. The internal wiring lift as in claim 1, wherein at least one cable is guided in a first channel defined within the link.
  3. 3. The internal wiring lift as in claim 2, wherein the link includes two side plates and a bottom plate bridging between the two side plates, the two side plates being spaced apart from one another on the link pivot axis, the two side plates and the bottom plate together defining a first channel for guiding and restraining the cable.
  4. 4. The internal wiring lift as in claim 2, wherein the first channel has at least one corner portion to guide bending such that the guiding of the cable in adjacent links is bent by the corner portion and the pivot portion, respectively.
  5. 5. The internal wiring lift as in claim 4, wherein the links are generally bent and include first and second angularly connected guide portions, wherein in adjacent links, the first guide portion of one link is pivotally connected to the second guide portion of the other link, the first and second guide portions defining a receiving space external to the link, and wherein when the chain guide is folded, one of the adjacent links is at least partially received in the receiving space of the other link.
  6. 6. The internal wiring lift as in claim 1, wherein the cable is attached to the outer surfaces of the plurality of links to form a plurality of curved structures compatible with the chain guide, the curved directions of adjacent curved structures being opposite.
  7. 7. The internal wiring lift as in claim 1, wherein at least some of the links in the chain guide are pre-set in a pivoting direction by a reset guide element that pre-sets opposite pivoting directions for adjacent links for a plurality of links disposed axially along the tubular member to guide the chain guide to reverse folding along a stretch trajectory.
  8. 8. The internal wiring lift as in claim 7, wherein the return guide element is configured as an angle limiting element that limits a maximum pivot angle of adjacent links, the maximum pivot angle being less than 180 °.
  9. 9. The internal wiring lift as in claim 8, wherein the angle limiting member comprises two connecting arms and a stop portion bridging between the two connecting arms, the two connecting arms being respectively pivoted to both sides of the link in the pivoting axis direction, the stop portion stopping the adjacent links to limit the maximum pivoting angle thereof.
  10. 10. The internal wiring lift as in claim 9, wherein the space enclosed by the two connecting arms and the stop portion forms a second channel through which the cable passes, the cable in the second channel being constrained by the angle limiting element.
  11. 11. The internal wiring lift as in claim 7, wherein the return guide element is configured as a resilient preload element that exerts a moment on adjacent links tending to a folded state.
  12. 12. The internal wiring lift as in claim 7, wherein the reset guide members are disposed in the pivot portion of adjacent links, with at least two links spaced apart between adjacent reset guide members.
  13. 13. The internal wiring lift as in claim 1, further comprising a telescoping auxiliary guide, the telescoping direction of the auxiliary guide being coincident with the telescoping direction of the telescoping assembly, the chain guide being constrained forcibly by the auxiliary guide to fold or stretch in a linear telescoping direction defined by the auxiliary guide.
  14. 14. The internal wiring lifting device as claimed in claim 13, wherein the auxiliary guide means is connected to the upper and lower ends of the telescopic assembly to be driven to be telescopic by the telescopic assembly, or the auxiliary guide means is connected to the upper and lower ends of the chain guide to be driven to be telescopic by the chain guide.
  15. 15. An internal wiring lifting device as claimed in claim 13 wherein the auxiliary guide means comprises at least two nested rod-like members, at least part of the links of the chain guide means being provided with guide blocks, all of the guide blocks being constrained to and axially slidable relative to the rod-like members.
  16. 16. The internal wiring lift as in claim 15, wherein adjacent links are pivotally connected by a pivot axis, and wherein the guide block is pivotally connected to the pivot axis.
  17. 17. The internal wiring lift as in claim 1, wherein the telescoping assembly includes an axial cavity defined by at least two nested tubular members, the drive unit and the chain guide being disposed side-by-side in the axial cavity, opposite side walls of at least one tubular member being adapted to limit the lateral bending amplitude of the chain guide.
  18. 18. The internal wiring lift as in claim 1, wherein the innermost tubular member end of the telescoping assembly has a first mounting plate and the outermost tubular member end of the telescoping assembly has a second mounting plate, the chain links at one end of the chain guide being connected to the first mounting plate and the chain links at the other end of the chain guide being connected to the second mounting plate.
  19. 19. Height adjustable furniture comprising an internal wiring lifting device according to any one of claims 1 to 18.

Description

Inner wiring lifting device and height-adjustable furniture Technical Field The invention relates to the technical field of furniture, in particular to an inner wiring lifting device and height-adjustable furniture. Background In the prior art, when the lifting device is used as an accessory of the height-adjustable furniture, one end or two ends of the lifting device always have equipment which needs to communicate or supply power. The conventional mode is to use a cable drag chain to connect equipment needing power supply or communication outside the lifting device, and when the lifting device stretches and contracts, the cable drag chain moves along with the equipment, so that the equipment at the end part of the lifting device can work normally or communicate. However, the cable drag chain is large in size, so that the appearance of the cable drag chain is influenced by the appearance of the cable drag chain. In order to solve the problem that the cable drag chain is exposed, the prior art also discloses a lifting device with a built-in cable, and when the cable is arranged inside the lifting device, a spiral cable is generally selected to realize synchronous expansion of the cable and the lifting device. The spiral cable is wound on the three-dimensional space, so that the occupied space of the spiral cable is larger, in addition, in order to guide the expansion and contraction of the spiral cable, a telescopic sleeve is arranged in the lifting device, no matter the telescopic sleeve is sleeved on the outer side of the spiral cable or the spiral cable is sleeved on the outer side of the telescopic sleeve, the occupied space of the telescopic sleeve and the telescopic sleeve is further increased, so that the lifting device is larger in size, in addition, the expansion and contraction ratio (namely the ratio between the maximum length of the cable which can be stretched when being stressed and the minimum length of the cable in the natural contracted state) of the spiral cable is larger, the required cable length of the spiral cable is longer, the material cost of the cable is increased, and finally, the spiral cable cannot be applicable to cables (such as multi-core flat cables and coaxial cables) with harder core wires and cannot form stable spirals, so that the spiral cable has higher requirements on the required cable. Disclosure of Invention In order to solve the technical problems that the lifting device is large in size and the cost of cable materials is increased due to the fact that a spiral cable is arranged in the lifting device in the prior art, the invention provides the inner wiring lifting device and the height-adjustable furniture, the size of the lifting device can be effectively reduced, the cable length can be effectively shortened under the condition of the same stretching length, the cost of the cable materials is reduced, and meanwhile, the requirement on the cable materials is low. In order to achieve the technical purpose, the inner wiring lifting device provided by the invention comprises: a telescoping assembly comprising at least two nested tubular members; a drive unit for driving the at least two tubular members to move axially relative to each other to adjust the telescopic assembly; At least one cable is arranged in the telescopic component in a penetrating way; A cable guide device for guiding the cable to be retracted inside the retraction assembly; the cable guiding device is arranged as a chain guiding device and comprises a plurality of chain links axially arranged along the tubular component, the adjacent chain links are pivotally connected and can pivot relatively around the pivot points, so that the chain guiding device is cooperatively folded or stretched in the telescoping process of the telescoping assembly, and the cable is attached to the chain guiding device and is adaptively folded or stretched. The cable guiding device is arranged as a chain guiding device and comprises a plurality of chain links axially arranged along a tubular component, and the adjacent chain links are pivotally connected and can pivot relatively around pivot points, so that the chain guiding device is cooperatively folded or stretched by driving the chain links to rotate in the telescoping process of the telescoping assembly, and the cable is attached to the chain guiding device and is adaptively folded or stretched, and because the structure of the chain guiding device is flattened, the cable is flattened after being attached to the chain guiding device, and the cable can be arranged in a flattened space, so that the distance between the innermost side of the telescoping assembly and a driving unit is effectively reduced, and the volume of the lifting device is further reduced; in addition, if no cable guiding device is arranged to guide the cable to fold, the cable is extremely easy to form excessive bending under the extrusion of the pipe wall or the self to lead to signal attenuation