Telescopic supporting device and lighting device

Abstract

The utility model discloses a telescopic supporting device and a lighting device.The telescopic supporting device comprises a static supporting assembly, a movable supporting assembly and a switch assembly, the static supporting assembly comprises a first supporting piece and a nut base, and the nut base is fixed to the first supporting piece; the movable supporting assembly comprises a second supporting piece, a limiting base and a lead screw. The second supporting piece and the static supporting assembly are in sliding fit in the axial direction and are in limiting fit in the circumferential direction surrounding the axis. The limiting seat is fixed to the second supporting piece, the lead screw is in threaded connection with the nut seat and penetrates through the limiting seat in the axial direction, and the lead screw and the limiting seat are in rotatable fit in the circumferential direction surrounding the axis and in limiting fit in the axial direction; the switch assembly comprises a clutch base and a clutch cover which are oppositely arranged, the clutch base is movably arranged relative to the limiting base, and the clutch cover is fixed to the upper end of the lead screw. The rotatable capacity of the lead screw relative to the nut seat is changed through the clutch state of the switch assembly, hovering or stretching is achieved, the structure is simple, and cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of supporting devices of household appliances, in particular to a telescopic supporting device and a lighting device. BACKGROUND

[0002] Household appliances such as lighting devices sometimes need to change the supporting state to adjust the use effect, for example, adjusting the height of the lamp body of the lighting device to change the brightness, the irradiation range or the orientation. Among various supporting devices, a straight-line transmission device such as the combination of a lead screw and a nut seat has been widely used because it can realize stepless telescopic length adjustment. For example, the Chinese utility model patent with the publication number CN215489240U discloses that a motor 5 is placed at the bottom to drive a lead screw 6, and then a lifting rod 8 is lifted by using an internal threaded block 7. However, the hovering or one-way limiting of the lifting rod 8 requires the motor 5 to always load a reaction torque, so the power consumption is large. SUMMARY

[0003] The main purpose of the present application is to provide a telescopic supporting device and a lighting device, which aims to solve the technical problem of high cost and energy consumption of the existing telescopic supporting device because the hovering needs to be configured with a motor to apply a holding torque.

[0004] To achieve the above-mentioned purpose, the telescopic supporting device provided by the present application comprises a static supporting assembly, a dynamic supporting assembly and a switch assembly, wherein,

[0005] The static supporting assembly comprises a first supporting piece and a nut seat, and the nut seat is fixed to the first supporting piece;

[0006] The dynamic supporting assembly comprises a second supporting piece, a limiting seat and a lead screw, and the second supporting piece is slidably connected with the static supporting assembly in the axial direction and is limitedly connected in the circumferential direction around the axis;

[0007] The limiting seat is fixed to the second supporting piece, the lead screw is threadedly connected with the nut seat and penetrates the limiting seat in the axial direction, and the lead screw is rotatably connected with the limiting seat in the circumferential direction around the axis and is limitedly connected in the axial direction;

[0008] The switch assembly comprises a clutch seat and a clutch cover arranged oppositely, the clutch seat is movably arranged relative to the limiting seat or the second supporting piece, and the clutch cover is fixedly arranged at the upper end of the lead screw.

[0009] Preferably, the dynamic supporting assembly further comprises a plurality of bearings, the inner ring of the bearing is fixedly arranged on the lead screw, the limiting seat is provided with a bearing chamber matched with the bearing, and a shaft hole matched with the lead screw.

[0010] Preferably, the limiting seat comprises a core body and a side clamping seat fixedly connected with the core body, and the core body is provided with the bearing chamber and the shaft hole at the splicing surface of the core body and the side clamping seat.

[0011] Preferably, the upper end surface of the limiting seat is provided with a guide cavity, the clutch seat is slidably matched with the inner wall surface of the guide cavity in the axial direction and is limitedly matched in the circumferential direction around the axis.

[0012] Preferably, the clutch seat is located between the clutch cover and the bottom wall surface of the guide cavity, and the switch assembly further comprises a reset member arranged between the clutch seat and the bottom wall surface of the guide cavity to keep the clutch seat and the clutch cover engaged.

[0013] Preferably, the second support member is in a cylindrical shape, the second support member is sleeved on the outer periphery of the lead screw, the limiting seat is fixedly embedded in the inner cavity of the upper end of the second support member, the outer peripheral surface of the limiting seat is provided with a limiting shoulder, the limiting shoulder is provided with a first through hole, the limiting shoulder abuts against the upper end surface of the second support member, the upper end surface of the second support member is provided with a first fixed hole, and the movable support assembly further comprises a first fastener penetrating through the first through hole and fixedly connected with the first fixed hole.

[0014] Preferably, the upper end of the limiting seat protrudes from the upper end surface of the second support member, the telescopic support device further comprises an adapter arm, a press-fit member and a second fastener, one end of the adapter arm is provided with an adapter cylinder, the adapter cylinder is provided in an open-ended manner, the adapter cylinder is sleeved on the upper end of the limiting seat and abuts against the limiting shoulder, the inner wall surface of the adapter cylinder is provided with a limiting step, the press-fit member is fixedly connected with the limiting seat and is pressed on the upward step surface of the limiting step.

[0015] The outer peripheral surface of the limiting seat is provided with an avoiding groove corresponding to the first through hole, the avoiding groove extends in the axial direction and penetrates through the upper end surface of the limiting seat, the lower end surface of the press-fit member is provided with a positioning column corresponding to the avoiding groove, the press-fit member is provided with a second through hole, the upper end surface of the limiting seat is provided with a second fixed hole, and the second fastener penetrates through the second through hole and is fixedly connected with the second fixed hole.

[0016] Preferably, the movable support assembly further comprises a plurality of bearings, the inner ring of the bearing is fixedly arranged on the lead screw, and the limiting seat is provided with a bearing chamber matched with the bearing.

[0017] The limiting seat comprises a core body, a side clamping seat and a guide seat, the side clamping seat and the guide seat are fixedly connected with the core body, the core body is provided with the bearing chamber and the shaft hole matched with the lead screw at the splicing surface of the core body and the side clamping seat.

[0018] The upper end of the core body is formed with a limiting cylinder facing the opening, the guide seat is embedded in the inner cavity of the limiting cylinder, the guide seat and the inner wall surface of the limiting cylinder are axially slidably matched and circumferentially limitedly matched around the axis, the upper end surface of the guide seat is provided with a guide cavity, the clutch seat and the inner wall surface of the guide cavity are axially slidably matched and circumferentially limitedly matched around the axis, the limiting step is formed on the core body, and the second fixing hole is formed in the upper end surface of the guide seat.

[0019] Preferably, the limiting seat is provided with a first wire channel penetrating through the upper and lower end surfaces thereof, and the upper end surface of the second support member is provided with a second wire channel connected with the first wire channel.

[0020] Preferably, the second support member is in a cylindrical shape, the second support member is sleeved on the periphery of the screw rod, the limiting seat is fixedly embedded in the inner cavity of the upper end of the second support member, the upper end of the limiting seat protrudes from the upper end surface of the second support member, the telescopic support device further comprises an adapter arm and a pressing member, one end of the adapter arm is provided with an adapter cylinder, the adapter cylinder is provided in an open manner at both ends, the adapter cylinder is sleeved on the upper end of the limiting seat, and the inner wall surface of the adapter cylinder is provided with a limiting step; the pressing member is fixedly connected with the limiting seat and is pressed on the upward step surface of the limiting step.

[0021] Preferably, the adapter arm comprises a body and a side cover, the body comprises a long strip-shaped rod portion and the adapter cylinder provided at one end of the rod portion, the inner cavity of the rod portion is provided in an open manner to one side, the inner cavity of the rod portion is communicated with the inner cavity of the adapter cylinder, and the side cover covers the opening of the rod portion.

[0022] Preferably, the side cover is formed with a pressing cavity corresponding to the position of the adapter cylinder, the clutch seat is provided with a conducting rod extending upwardly to the pressing cavity, the switch assembly further comprises a key fixedly arranged on the upper end of the conducting rod, and the key is located in the pressing cavity.

[0023] Preferably, the second support member is in a cylindrical shape, the second support member is sleeved on the periphery of the first support member, and the dynamic support assembly further comprises a sliding guide shoe, the sliding guide shoe is fixedly embedded in the inner cavity of the lower end of the second support member, the sliding guide shoe is formed with a guide hole matched with the first support member, and the sliding guide shoe and the static support assembly are axially slidably matched and circumferentially limitedly matched around the axis.

[0024] Preferably, the sliding guide shoe comprises a shoe sleeve and a connecting portion arranged on the outer circumferential surface of one end of the shoe sleeve, the guide hole is formed in the inner cavity of the shoe sleeve, the connecting portion abuts against the lower end surface of the second support member, the connecting portion is provided with a third through hole, the lower end surface of the second support member is provided with a third fixing hole corresponding to the third through hole, and the movable support assembly further comprises a third fastener penetrating through the third through hole and fixedly connected with the third fixing hole.

[0025] Preferably, the static support assembly further comprises a third support member in the shape of a cylinder, the third support member is sleeved on the outer periphery of the first support member, and the second support member is telescopically arranged between the first support member and the third support member.

[0026] Preferably, the second support member and the third support member are in slidable cooperation in the axial direction and are in limiting cooperation in the circumferential direction around the axis.

[0027] Preferably, the movable support assembly further comprises a sliding guide shoe fixedly embedded in the inner cavity of the lower end of the second support member, the sliding guide shoe comprises a shoe sleeve and a connecting portion arranged on the outer circumferential surface of one end of the shoe sleeve, wherein,

[0028] the shoe sleeve of the sliding guide shoe is formed with a guide hole in mutual sleeving connection with the first support member, the connecting portion abuts against the lower end surface of the second support member, the outer circumferential surface of the connecting portion is provided with a first guide key, and the inner circumferential surface of the third support member is provided with a first guide slot, the first guide slot and the first guide key are in slidable cooperation in the axial direction and are in limiting cooperation in the circumferential direction around the axis.

[0029] Preferably, the limiting seat is provided with a first wire channel penetrating through the upper and lower end surfaces thereof, the inner wall surface of the second support member is provided with a plurality of second guide keys, the outer circumferential surface of the limiting seat is provided with a plurality of second guide slots, the second guide slots and the second guide keys are in slidable cooperation in the axial direction and are in limiting cooperation in the circumferential direction around the axis, at least one of the plurality of second guide keys is provided with a second wire channel in communication with the first wire channel, and the second wire channel penetrates through the upper and lower end surfaces of the second support member.

[0030] Preferably, the movable support assembly further comprises a sliding guide shoe fixedly embedded in the inner cavity of the lower end of the second support member, the sliding guide shoe comprises a shoe sleeve and a connecting portion arranged on the outer circumferential surface of one end of the shoe sleeve, the shoe sleeve of the sliding guide shoe is formed with a guide hole in mutual sleeving connection with the first support member, the connecting portion abuts against the lower end surface of the second support member, and the connecting portion is provided with a first wire through hole corresponding to the second wire channel.

[0031] Preferably, the second wire channel is provided with a side opening near one side of the central axis of the second support, the side opening extends along the axis and penetrates the upper end surface and the lower end surface of the second support, and the width of the side opening is smaller than the inner diameter of the second wire channel.

[0032] Preferably, the static support assembly further comprises a connecting seat, the connecting seat comprises a connecting column and a spacer provided at one end of the connecting column, the first support is in a cylindrical shape, the connecting column is fixedly embedded in the inner cavity of the lower end of the first support, and the spacer is fixedly embedded in the inner cavity of the lower end of the third support.

[0033] Preferably, the spacer is provided with a second wire through hole, and the second wire through hole communicates the annular cavity between the first support and the third support.

[0034] Preferably, the clutch seat has a sleeve hole matched with the screw rod, the upper end surface of the clutch seat is provided with a clutch chamber connected with the sleeve hole, the bottom wall surface of the clutch chamber is formed at the periphery of the sleeve hole, the side wall surface of the clutch chamber is provided with a first limiting tooth, the lower end surface of the clutch cover is provided with a limiting column matched with the first limiting tooth, and the first limiting tooth and the limiting column are slidably matched in the axial direction and are limitingly matched in the circumferential direction around the axis.

[0035] Preferably, the bottom wall surface of the clutch chamber is provided with an inner limiting ring at the periphery of the sleeve hole, and an annular groove is formed between the inner limiting ring and the inner wall surface of the clutch chamber; the outer peripheral surface of the inner limiting ring is provided with a second limiting tooth, the second limiting tooth and the limiting column are slidably matched in the axial direction and are limitingly matched in the circumferential direction around the axis; the limiting column, the first limiting tooth and the second limiting tooth are arranged in an array in the circumferential direction around the axis; when the switch assembly is in the locked state, the limiting column is located in the annular groove, and the limiting column is matched with the first limiting tooth and the second limiting tooth, respectively.

[0036] Preferably, the first support is in a cylindrical shape, and the threaded hole of the nut seat is in communication with the inner cavity of the first support.

[0037] Preferably, the nut seat is fixedly embedded in the inner cavity of the upper end of the first support.

[0038] The application also provides a lighting device, comprising a support and a lamp body provided on the support, and the support comprises the telescopic support device as described above.

[0039] Preferably, the support further comprises a base, and the lower end of the first support is fixedly connected with the base.

[0040] The telescopic supporting device can realize stable hovering or one-way supporting limiting of the second supporting part relative to the first supporting part, and the state does not need to utilize the motor to exert the reaction torque on the screw rod, thus no additional energy consumption, and the stable hovering or supporting limiting can be realized and the low use cost can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0042] Figure 1 It is a perspective structural schematic view of the embodiment of the lighting device of the present application.

[0043] Figure 2 It is a perspective structural schematic view of the embodiment of the lighting device of the present application. Figure 1

[0044] Figure 3 It is an exploded structural schematic view of the telescopic supporting device. Figure 2

[0045] Figure 4 It is a rear view structural schematic view of the telescopic supporting device. Figure 2

[0046] Figure 5 It is a sectional structural schematic view along the line V-V of the telescopic supporting device. Figure 4

[0047] Figure 6 It is a sectional structural schematic view along the line VI-VI of the telescopic supporting device. Figure 4

[0048] Figure 7 It is a sectional structural schematic view along the line VII-VII of the telescopic supporting device. Figure 4

[0049] Figure 8 It is a sectional structural schematic view along the line VIII-VIII of the telescopic supporting device. Figure 4

[0050] Figure 9 It is a local enlarged structural schematic view of A of the telescopic supporting device. Figure 8 ​​​​​​​​

[0051] Figure 10 for Figure 8 partial enlarged structural schematic view at B;

[0052] Figure 11 for Figure 8 partial enlarged structural schematic view at C;

[0053] Figure 12 for Figure 2 partial structural perspective view of upper part of telescopic support device;

[0054] Figure 13 for Figure 12 perspective view of structure from another angle;

[0055] Figure 14 for Figure 12 exploded structural schematic view of structure;

[0056] Figure 15 for Figure 14 perspective view of assembly structure of core and electric connection wire;

[0057] Figure 16 for Figure 12 exploded structural schematic view of structure from another angle;

[0058] Figure 17 for Figure 16 perspective view of assembly structure of side clamping seat and multiple bolts;

[0059] Figure 18 for Figure 16 perspective structural schematic view of clutch seat;

[0060] Figure 19 for Figure 18 cutaway structural perspective view of clutch seat;

[0061] Figure 20 for Figure 16 perspective structural schematic view of clutch cover;

[0062] Figure 21 for Figure 2 partial structural perspective view of middle part of telescopic support device;

[0063] Figure 22 for Figure 21 cutaway structural perspective view of partial structure;

[0064] Figure 23 for Figure 21 perspective structural schematic view of third support from bottom view;

[0065] Figure 24 for Figure 21The second support of the middle local structure and the sliding guide shoe are shown in the exploded view;

[0066] Figure 25 For Figure 2 The middle local structure of the telescopic support device is shown in the perspective view;

[0067] Figure 26 For Figure 25 The middle local structure is shown in the perspective view of the sectional structure;

[0068] Figure 27 For Figure 25 The middle local structure is shown in the exploded view.

[0069] BRIEF DESCRIPTION OF DRAWINGS

[0070]

[0071] DETAILED DESCRIPTION

[0072] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0073] Referring to Figures 1 to 4 And Figures 8 to 11 In an embodiment, the telescopic support device 400 provided by the present application comprises a static support assembly 10, a dynamic support assembly 20 and a switch assembly 50, wherein,

[0074] The static support assembly 10 comprises a first support 11 and a nut seat 13, and the nut seat 13 is fixed to the first support 11.

[0075] The dynamic support assembly 20 comprises a second support 21, a limiting seat 25 and a screw rod 37; the second support 21 is slidably connected with the static support assembly 10 along the axial direction and is limitedly connected in the circumferential direction around the axis; the limiting seat 25 is fixed to the upper end of the second support 21, the screw rod 37 is threadedly connected with the nut seat 13 and penetrates the limiting seat 25 along the axial direction, and the screw rod 37 is rotatably connected with the limiting seat 25 in the circumferential direction around the axis and is limitedly connected in the axial direction.

[0076] The switch assembly 50 comprises a clutch seat 51 and a clutch cover 57 which are oppositely arranged, the clutch seat 51 is movably arranged relative to the limiting seat 25 or the second support 21, and the clutch cover 57 is fixedly arranged at the upper end of the screw rod 37.

[0077] In the embodiment, the static support assembly 10 and the dynamic support assembly 20 are relative concepts. In a specific application, the dynamic support assembly 20 can be static relative to an external reference, such as a desk, while the static support assembly 10 moves relative to the dynamic support assembly 20. The orientation described herein is when the central axis or length direction of the first support 11 or the second support 21 is aligned with the vertical axis, but in actual applications, the central axis of the first support 11 or the second support 21 can also be inclined or perpendicular to the vertical axis.

[0078] In order to make the outer diameter small enough and ensure sufficient strength, the first support 11 and the second support 21 are preferably made of metal materials, such as stainless steel or aluminum alloy. The nut seat 13 has a threaded hole for threaded connection with the screw rod 37. The second support 21 can be directly or indirectly slidably connected with the first support 11, or can be slidably connected with other components of the static support assembly 10. The limiting seat 25 is used to bridge the second support 21 and the screw rod 37, and to ensure that the screw rod 37 can rotate.

[0079] When the clutch seat 51 is separated from the clutch cover 57, the screw rod 37 and the nut seat 13 can rotate relative to each other, so that the screw rod 37 can drive the second support 21 to extend or retract relative to the first support 11. This movement can be achieved manually or directly by gravity. When the clutch seat 51 is locked with the clutch cover 57, the screw rod 37 cannot rotate relative to the nut seat 13 under the limiting action of the clutch cover 57, so that the second support 21 connected with the screw rod 37 is stably suspended or one-way supported relative to the first support 11. This state does not require the motor to apply a counter-torque to the screw rod 37, so there is no additional energy consumption, thereby achieving stable suspension or support limiting while ensuring low use cost.

[0080] Further, please refer to Figures 14 to 17 In an embodiment, the dynamic support assembly 20 further comprises a plurality of bearings 38, the inner ring of the bearing 38 is fixedly arranged on the screw rod 37; the limiting seat 25 is provided with a bearing chamber 26 adapted to the bearing 38, and a shaft hole 27 adapted to the screw rod 37.

[0081] In the embodiment, the use of the bearing 38 not only facilitates the axial limiting fit, but also reduces the resistance when the screw rod 37 rotates. In order to achieve more stable rotation, preferably, the number of bearings 38 is two or more, and are arranged in the axial direction of the screw rod 37.

[0082] Further, the limiting seat 25 comprises a core 28 and a side clamping seat 29 fixedly connected with the core 28, and the splicing surface of the core 28 and the side clamping seat 29 is provided with the bearing chamber 26 and the shaft hole 27.

[0083] In the embodiment, the bearing 38 and the screw rod 37 are clamped between the core 28 and the side clamping seat 29, so that the bearing 38 and the screw rod 37 can be stably supported, and the production and assembly of the limiting seat 25 are facilitated.

[0084] Further, the upper end surface of the limiting seat 25 is provided with a guide cavity 31, and the clutch seat 51 is axially slidably connected with the inner wall surface of the guide cavity 31 and is limited in the circumferential direction around the axis.

[0085] In the embodiment, the side wall surface of the guide cavity 31 can guide the clutch seat 51 to move in the axial direction, so that the switch assembly 50 can be more smoothly switched between the release and locking states.

[0086] Further, the clutch seat 51 is located between the clutch cover 57 and the bottom wall surface of the guide cavity 31, and the switch assembly 50 further comprises a reset member 58, which is arranged between the clutch seat 51 and the bottom wall surface of the guide cavity 31 to keep the clutch seat 51 engaged with the clutch cover 57.

[0087] In the embodiment, since the second support member 21 is in a relatively static state, the reset member 58 is used to keep the clutch seat 51 engaged with the clutch cover 57, which can better match the normal state of the second support member 21. Specifically, the reset member 58 can be a compression spring, but is not limited thereto.

[0088] Further, with reference to Figure 8 , Figure 9 , Figures 12 to 17 In an embodiment, the second support member 21 is in a cylindrical shape, and the second support member 21 is sleeved on the outer periphery of the screw rod 37; the limiting seat 25 is fixedly embedded in the inner cavity of the upper end of the second support member 21, and the outer peripheral surface of the limiting seat 25 is provided with a limiting shoulder 32, the limiting shoulder 32 is provided with a first through hole 321, the limiting shoulder 32 abuts against the upper end surface of the second support member 21, the upper end surface of the second support member 21 is provided with a first fixing hole 22a, and the dynamic support assembly 20 further comprises a first fastener 39 which passes through the first through hole 321 and is fixedly connected with the first fixing hole 22a.

[0089] In the embodiment, the second support member 21 is in a cylindrical shape, so that the light weight and better bending resistance can be achieved, and the second support member 21 can protect the screw rod 37 or prevent the user from being injured by the exposed screw rod 37. The limiting seat 25 is embedded in the inner cavity of the upper end of the second support member 25, so that the limiting seat 25 is more fixed and stable, and the installation or connection of other parts is facilitated. The limiting shoulder 32 can provide good support for the limiting seat 25, for example, to prevent the limiting seat 25 from excessively extending into the inner cavity of the second support member 21. The limiting seat 25 and the second support member 21 are detachably connected by the first fastener 39, so that the assembly is facilitated, and the respective parts are separately formed.

[0090] Further, with reference to Figures 1 to 4 , Figure 8 , Figure 9 , Figures 12 to 14 , Figure 16 In an embodiment, the upper end of the limiting seat 25 protrudes from the upper end surface of the second support 21, and the telescopic support device 400 further comprises an adapter arm 60, a pressing member 70, and a second fastener 80. One end of the adapter arm 60 is provided with an adapter cylinder 63, which is open at both ends. The adapter cylinder 63 is sleeved on the upper end of the limiting seat 25 and abuts against the limiting shoulder 32. The inner wall surface of the adapter cylinder 63 is provided with a limiting step 64. The pressing member 70 is fixedly connected with the limiting seat 25 and is pressed on the upward step surface of the limiting step 64.

[0091] The outer peripheral surface of the limiting seat 25 is provided with an avoiding groove 33 corresponding to the first through hole 321, which extends along the axial direction and penetrates through the upper end surface of the limiting seat 25. The lower end surface of the pressing member 70 is provided with a positioning column 71 corresponding to the avoiding groove 33. The pressing member 70 is provided with a second through hole 72, and the upper end surface of the limiting seat 25 is provided with a second fixed hole 34. The second fastener 80 passes through the second through hole 72 and is fixedly connected with the second fixed hole 34.

[0092] In this embodiment, the adapter arm 60 is provided to facilitate the support in the direction inclined or perpendicular to the central axis of the first support 11 or the second support 21. The pressing member 70 is detachably connected with the limiting seat 25, which can prevent the adapter arm 60 from loosening relative to the limiting seat 25 and facilitate the separate molding of each component. The avoiding groove 33 not only facilitates the installation of the second fastener 80, such as inserting the rod part 62 of a screwdriver into the avoiding groove 33 to make the tip of the screwdriver butt against the second fastener 80, but also provides positioning for the pressing member 70 by cooperating with the positioning column 71 to prevent the pressing member 70 from rotating relative to the limiting seat 25.

[0093] Further, the movable support assembly 20 further comprises a plurality of bearings 38, the inner ring of each bearing 38 is fixedly arranged on the lead screw 37. The limiting seat 25 is provided with a bearing chamber 26 adapted to the bearings 38.

[0094] The limiting seat 25 comprises a core body 28, a side clamping seat 29, and a guide seat 35. The side clamping seat 29 and the guide seat 35 are fixedly connected with the core body 28. The core body 28 is provided with the bearing chamber 26 and a shaft hole 27 adapted to the lead screw 37 at the splicing surface of the core body 28 and the side clamping seat 29.

[0095] The upper end of the core 28 is formed with a limiting cylinder 281 facing the opening, the guide seat 35 is embedded in the inner cavity of the limiting cylinder 281, the guide seat 35 is in slidable cooperation with the inner wall surface of the limiting cylinder 281 in the axial direction and is in limiting cooperation in the circumferential direction around the axis, the upper end surface of the guide seat 35 is provided with a guide cavity 31, the clutch seat 51 is in slidable cooperation with the inner wall surface of the guide cavity 31 in the axial direction and is in limiting cooperation in the circumferential direction around the axis, the limiting step 64 is formed on the core 28, and the second fixing hole 34 is provided in the upper end surface of the guide seat 35.

[0096] In the embodiment, as in the previous embodiment, the side clamping seat 29 and the core 28 clamp the bearing 38 and the lead screw from both sides, which not only can stably support the bearing 38 and the lead screw in the middle, but also is beneficial to simplify the assembly. The limiting cylinder 281 can form support for the guide seat 35 from the periphery, thereby ensuring the stability of the limiting cylinder 281 itself. The guide cavity 31 is formed in the guide seat 35, so that the guide seat 35 can be processed separately to obtain an assembly surface with relatively higher precision; the inner wall surface of the guide cavity 31 is used to guide the axial movement of the clutch seat 51, so that the movement precision can be ensured and the movement resistance can be reduced. In order to better realize the fixation of the guide seat 35, the lower end of the guide seat 35 is detachably fixed with the lower part of the core 28.

[0097] Further, the limiting seat 25 is provided with a first wire channel 36 penetrating the upper and lower end surfaces thereof, and the upper end surface of the second support 21 is provided with a second wire channel 23 connected with the first wire channel 36.

[0098] In the embodiment, the electric connection wire 90 can be arranged relatively concealed and continuously in the first wire channel 36 and the second wire channel 23, and the arrangement of the electric connection wire 90 avoids affecting the moving parts such as the lead screw 37 or the clutch seat 51.

[0099] Further, the second support 21 is in a cylindrical shape, the second support 21 is sleeved on the periphery of the lead screw 37, the limiting seat 25 is fixedly embedded in the inner cavity of the upper end of the second support 21, the upper end of the limiting seat 25 protrudes from the upper end surface of the second support 21, the telescopic support device 400 further comprises an adapter arm 60 and a pressing member 70, one end of the adapter arm 60 is provided with an adapter cylinder 63, the adapter cylinder 63 is provided in an open both ends manner, the adapter cylinder 63 is sleeved on the upper end of the limiting seat 25, and the inner wall surface of the adapter cylinder 63 is provided with the limiting step 64; the pressing member 70 is fixedly connected with the limiting seat 25 and is pressed on the upward step surface of the limiting step 64.

[0100] In the embodiment, first, as in the previous embodiment, the second support member 21 is cylindrical, which achieves better bending resistance while achieving lightweight. In addition, the second support member 21 can protect the lead screw 37 or prevent users from being injured by the exposed lead screw 37. The limiting seat 25 is embedded in the inner cavity of the upper end of the second support member 25, which is more stable and convenient for installing or connecting other components. The adapter arm 60 can be provided to provide support in a position inclined or perpendicular to the central axis of the first support member 11 or the second support member 21. The pressing member 70 is detachably connected with the limiting seat 25, which can prevent the adapter arm 60 from loosening relative to the limiting seat 25, and also facilitates the separate molding of each component.

[0101] Further, the adapter arm 60 includes a body 61 and a side cover 65. The body 61 includes a long strip-shaped rod portion 62 and an adapter cylinder 63 provided at one end of the rod portion 62. The inner cavity of the rod portion 62 is open to one side, and the inner cavity of the rod portion 62 is in communication with the inner cavity of the adapter cylinder 63. The side cover 65 covers the opening of the rod portion 62.

[0102] In the embodiment, the rod portion 62 of the body 61 is hollow, and the inner cavity of the rod portion 62 is in communication with the inner cavity of the adapter cylinder 63. Thus, the inner cavity of the body 61 can also be used to arrange the electrical connection wire 90. By providing the side cover 65, it is convenient to assemble and better shield the electrical connection wire 90, thereby achieving better protection.

[0103] Further, the side cover 65 forms a pressing cavity 66 corresponding to the adapter cylinder 63. The clutch seat 51 is provided with a conductive rod 52 extending upward into the pressing cavity 66. The switch assembly 50 further includes a key 59 fixedly arranged on the upper end of the conductive rod 52, and the key 59 is located in the pressing cavity 66.

[0104] In the embodiment, the pressing cavity 66 can provide a stroke space for the key 59 to avoid other components obstructing the movement of the key 59. By providing the conductive rod 52 to connect the key 59, the transverse installation space can be saved, and more space can be provided for other structural components such as the inner structure of the side cover 65.

[0105] Further, with reference to Figure 4 , Figure 8 , Figure 10 , Figure 21 and Figure 22 , in an embodiment, the second support member 21 is cylindrical, and the second support member 21 is sleeved on the periphery of the first support member. The movable support assembly 20 further includes a sliding guide shoe 41 fixedly embedded in the inner cavity of the lower end of the second support member 21. The sliding guide shoe 41 forms a guide hole 43 that is mutually sleeved with the first support member 11. The sliding guide shoe 41 is slidably connected with the static support assembly 10 in the axial direction and is limitingly connected in the circumferential direction around the axis.

[0106] In this embodiment, as in the previous embodiment, the cylindrical second support member 21 can achieve better bending resistance while achieving lightweight. The second support member 21 indirectly cooperates with the first support member 11 through the slide shoe 41, so that the second support member 21 can maintain a relatively simple structure, such as a relatively simple and constant cross-sectional shape, under the premise of meeting its necessary functions, so that the second support member 21 is more suitable for manufacturing by extrusion or injection molding. The slide shoe 41 can be separately processed or selected to reduce friction and ensure sufficient structural strength.

[0107] Further, the slide shoe 41 includes a shoe sleeve 42 and a connecting portion 45 provided on the outer circumferential surface of one end of the shoe sleeve 42, the guide hole 43 is formed in the inner cavity of the shoe sleeve 42, the connecting portion 45 abuts against the lower end surface of the second support member 21, the connecting portion 45 is provided with a third through hole 46, and the lower end surface of the second support member 21 is provided with a third fixing hole 22b corresponding to the third through hole 46. The movable support assembly 20 further includes a third fastener 48 passing through the third through hole 46 and fixedly connected with the third fixing hole 22b.

[0108] In this embodiment, the slide shoe 41 is detachably fixed to the second support member 21 through the third fastener 48, so that the assembly and separate molding are facilitated, and at the same time, the abutment of the connecting portion 45 on the lower end surface of the second support member 21 can stably ensure the installation position of the shoe sleeve 42 in the inner cavity of the second support member 21.

[0109] Further, the static support assembly 10 further includes a third support member 14 sleeved on the outer periphery of the first support member 11, and the second support member 21 is telescopically arranged between the first support member 11 and the third support member 14.

[0110] In this embodiment, the first support member 11 and the third support member 14 can jointly support the second support member 21 in the radial direction, so that the telescopic movement of the second support member 21 is more stable, and the entire telescopic support device 400 is not easy to bend. In order to facilitate the telescopic movement of the electrical connection line 90, the part of the electrical connection line 90 between the third support member 14 and the first support member 11 can adopt a spiral structure.

[0111] Further, the second support member 21 and the third support member 14 are axially slidably cooperated and circumferentially limited.

[0112] In this embodiment, the third support member 14 not only shares the axial telescopic guiding function of the second support member 21, but also provides a circumferential limiting function, so that the first support member 11 can maintain a relatively simple structure, thereby facilitating production and manufacturing.

[0113] Further, the moving support assembly 20 further comprises a sliding guide shoe 41 fixedly embedded in the inner cavity of the lower end of the second support member 21, the sliding guide shoe 41 comprises a shoe sleeve 42 and a connecting portion 45 provided on the outer circumferal surface of one end of the shoe sleeve 42, wherein,

[0114] The shoe sleeve 42 of the sliding guide shoe 41 is formed with a guide hole 43 which is mutually sleeved with the first support member 11, the connecting portion 45 abuts against the lower end surface of the second support member 21, the outer circumferal surface of the connecting portion 45 is provided with a first guide key 47, and the inner circumferal surface of the third support member 14 is provided with a first guide slot 15, the first guide slot 15 is slidably matched with the first guide key 47 in the axial direction and is limitingly matched in the circumferal direction around the axis.

[0115] In the present embodiment, the second support member 21 indirectly utilizes the sliding guide shoe 41 to be slidably matched with the first support member 11, so that the second support member 21 can maintain a relatively simple structure, such as a relatively simple and constant cross-sectional shape, under the premise of meeting its necessary functions. The sliding guide shoe 41 can be separately processed or selected in material to reduce friction and ensure sufficient structural strength. In addition, forming a long strip-shaped guide slot on the inner wall surface of a long strip-shaped cylindrical component is more economical than forming a long strip-shaped guide key on the outer wall surface of a long strip-shaped cylindrical component. Therefore, it is more beneficial to reduce the processing cost by providing the first guide key 47 on the connecting portion 45 and providing the first guide slot 15 on the inner circumferal surface of the third inner cylinder.

[0116] Further, the limiting seat 25 is provided with a first wire passing channel 36 which penetrates the upper and lower end surfaces thereof, the inner wall surface of the second support member 21 is provided with a plurality of second guide keys 24a, 24b, the outer circumferal surface of the limiting seat 25 is provided with a plurality of second guide slots 282, the second guide slots 282 are slidably matched with the second guide keys 24a, 24b in the axial direction and are limitingly matched in the circumferal direction around the axis; at least one of the plurality of second guide keys 24a, 24b is provided with a second wire passing channel 23 which is connected with the first wire passing channel 36, and the second wire passing channel 23 penetrates the upper and lower end surfaces of the second support member 21.

[0117] In the present embodiment, the slidably matched limiting seat 25 and the second support member 21 can reduce the assembly resistance, that is, without significantly increasing the assembly difficulty, the axial matching size of the limiting seat 25 and the second support member 21 can be increased. At the same time, the matched second guide keys 24a, 24b and the second guide slots 282 can also prevent the limiting seat 25 from rotating relative to the second support member 21 around the central axis. By opening the second wire passing channel 23 through one of the second guide keys 24a, it is beneficial to prevent the electric connecting wire 90 from hindering the moving component, and the related structure is more compact, so that the second support member 21 obtains a smaller outer diameter size.

[0118] Further, the connecting portion 45 is provided with a first wire via hole 451 corresponding to the second wire channel 23. In the embodiment, the electric connecting wire 90 can pass through the first wire via hole 451 to enter between the first support 11 and the third support 14, thereby avoiding the opening of a hole in the side wall of the second support 21 to lead out the electric connecting wire 90.

[0119] Further, the second wire channel 23 is provided with a side opening 231 near one side of the central axis of the second support 21, the side opening 231 extending along the axis and penetrating the upper end face and the lower end face of the second support 21, and the width of the side opening 231 is smaller than the inner diameter of the second wire channel 23.

[0120] In the embodiment, the side opening 231 is provided to make the forming of the second wire channel 23 more convenient, for example, using extrusion molding when the material is aluminum alloy, or using injection molding when the material is plastic. In addition, by adjusting the width of the side opening 231 to match the width of the electric connecting wire 90, the electric connecting wire 90 can also be loaded into the second wire channel 23 through the side opening 231.

[0121] Further, with reference to Figures 1 to 4 , Figure 8 , Figure 11 and Figures 25 to 27 , in an embodiment, the static support assembly 10 further comprises a connecting seat 16, the connecting seat 16 comprising a connecting column 17 and a spacer 18 provided at one end of the connecting column 17, the first support 11 being in a cylindrical shape, the connecting column 17 being fixedly embedded in the inner cavity of the lower end of the first support 11, and the spacer 18 being fixedly embedded in the inner cavity of the lower end of the third support 14.

[0122] In the embodiment, similar to the second support 21 in a cylindrical shape, the first support 11 in a cylindrical shape can achieve better bending resistance while achieving lightweight. By providing the connecting seat 16, the first support 11 and the third support 14 can be more conveniently fixed together to other components, such as the base 500 of the lighting device. Specifically, the connecting column 17 can be fixed to the first support 11 by using a bolt, and then the third support 14 can be sleeved around the first support 11, and the spacer 18 of the connecting seat 16 can be fixed to the third support 14.

[0123] Further, the spacer 18 is provided with a second wire via hole 181, and the second wire via hole 181 communicates the annular cavity between the first support 11 and the third support 14.

[0124] In the embodiment, the electric connecting wire 90 can be led out of the inner cavity of the third support 14 through the second wire via hole 181, compared with opening a hole in the side wall of the third support 14 to lead out the electric connecting wire 90, the electric connecting wire 90 is better hidden, thereby achieving better insulation effect.

[0125] Further, the clutch seat 51 has a sleeve hole 53 matched with the screw rod 37, and the upper end surface of the clutch seat 51 is provided with a clutch chamber 54 connected with the sleeve hole 53, the bottom wall surface of the clutch chamber 54 is formed on the periphery of the sleeve hole 53, and the side wall surface of the clutch chamber 54 is provided with a first limiting tooth 55, and the lower end surface of the clutch cover 57 is provided with a limiting column 571 matched with the first limiting tooth 55, and the first limiting tooth 55 and the limiting column 571 are axially slidably matched and peripherally limited around the axis.

[0126] In the embodiment, the clutch chamber 54 of the clutch seat 51 can form a wrapping limiting structure for the locked state of the clutch cover 57, so that the clutch cover 57 is not easy to be loosened. The first limiting tooth 55 and the limiting column 571 are axially slidably matched, so that the clutch seat 51 and the clutch cover 57 can be more smoothly or quickly switched between states.

[0127] Further, the bottom wall surface of the clutch chamber 54 is provided with an inner limiting ring 56 on the periphery of the sleeve hole 53, and an annular groove 511 is formed between the inner limiting ring 56 and the inner wall surface of the clutch chamber 54; the outer peripheral surface of the inner limiting ring 56 is provided with a second limiting tooth 561, and the second limiting tooth 561 and the limiting column 571 are axially slidably matched and peripherally limited around the axis; the limiting column 571, the first limiting tooth 55 and the second limiting tooth 561 are arranged in an array around the axis; when the switch assembly 50 is in the locked state, the limiting column 571 is located in the annular groove 511, and the limiting column 571 is matched with the first limiting tooth 55 and the second limiting tooth 561, respectively.

[0128] In the embodiment, the second limiting tooth 561 and the second limiting tooth 561 limit the limiting column 571 from both sides of the radial direction, so that a larger and more stable locking force can be formed.

[0129] Further, the first support 11 is in a cylindrical shape, and the threaded hole of the nut seat 13 is in communication with the inner cavity of the first support 11. In the embodiment, similar to the second support 21 in a cylindrical shape, the first support 11 in a cylindrical shape can achieve better bending resistance while achieving lightweight. In addition, the inner cavity of the first support 11 can also accommodate the telescopic screw rod 37, avoiding exposure or tilting. Preferably, in order to achieve more stable installation, the nut seat 13 is fixedly embedded in the inner cavity of the upper end of the first support 11.

[0130] Reference Figure 1The application further provides a lighting device, which comprises a support 200 and a lamp body 300 arranged on the support 200, and the support 200 comprises the telescopic supporting device 400. The specific structure of the telescopic supporting device 400 is referred to the above-mentioned embodiments. Since the telescopic supporting device 400 adopts all the technical solutions of the above-mentioned embodiments, it also has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0131] In the embodiment, the support 200 can comprise one or more telescopic supporting devices 400, which are matched with the hinged structure, so that the posture of the lamp body 300 can be adjusted more conveniently, such as up and down, left and right, etc.

[0132] Further, the support 200 further comprises a base 500, and the lower end of the first supporting member 11 is fixedly connected with the base 500. In the embodiment, the lighting device can be conveniently placed on the desktop and kept stable by using the base 500.

[0133] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above-mentioned embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not drive the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A telescoping support device, characterized by, The device comprises a static support assembly, a dynamic support assembly and a switch assembly, wherein, The static support assembly comprises a first support and a nut seat fixed to the first support; The dynamic support assembly comprises a second support, a limiting seat and a screw rod; the second support is slidably connected with the static support assembly in the axial direction and is limitedly connected with the static support assembly in the circumferential direction around the axis; the limiting seat is fixed to the second support; the screw rod is threadedly connected with the nut seat and penetrates the limiting seat in the axial direction; the screw rod is rotatably connected with the limiting seat in the circumferential direction around the axis and is limitedly connected with the limiting seat in the axial direction; The switch assembly comprises oppositely arranged clutch seats and a clutch cover; the clutch seats are movably arranged relative to the limiting seat or the second support; the clutch cover is fixedly arranged at the upper end of the screw rod.

2. The telescoping support apparatus of claim 1, wherein, The dynamic support assembly further comprises a plurality of bearings; the inner rings of the bearings are fixedly arranged on the screw rod; the limiting seat is provided with bearing chambers matched with the bearings and a shaft hole matched with the screw rod.

3. The telescoping support device of claim 2, wherein, The limiting seat comprises a core body and a side clamping seat fixedly connected with the core body; the core body and the side clamping seat are provided with the bearing chambers and the shaft hole at the splicing surface thereof.

4. The telescoping support apparatus of claim 1, wherein, The upper end surface of the limiting seat is provided with a guide cavity; the clutch seat is slidably connected with the inner wall surface of the guide cavity in the axial direction and is limitedly connected with the inner wall surface of the guide cavity in the circumferential direction around the axis.

5. The telescoping support apparatus of claim 4, wherein, The clutch seat is located between the clutch cover and the bottom wall surface of the guide cavity; the switch assembly further comprises a reset member; the reset member is arranged between the clutch seat and the bottom wall surface of the guide cavity to keep the clutch seat and the clutch cover engaged.

6. The telescoping support apparatus of claim 1, wherein, The second support is in a cylindrical shape; the second support is sleeved on the periphery of the screw rod; the limiting seat is fixedly embedded in the inner cavity of the upper end of the second support; the outer peripheral surface of the limiting seat is provided with a limiting shoulder; the limiting shoulder is provided with a first through hole; the limiting shoulder is in abutment with the upper end surface of the second support; the upper end surface of the second support is provided with a first fixing hole; the dynamic support assembly further comprises a first fastener penetrating the first through hole and fixedly connected with the first fixing hole.

7. The telescopic support device according to claim 6, wherein The upper end of the limiting seat protrudes from the upper end surface of the second support; the telescopic support device further comprises an adapter arm, a pressing member and a second fastener; one end of the adapter arm is provided with an adapter cylinder; the adapter cylinder is in an open-ended arrangement; the adapter cylinder is sleeved on the upper end of the limiting seat and is in abutment with the limiting shoulder; the inner wall surface of the adapter cylinder is provided with a limiting step; the pressing member is fixedly connected with the limiting seat and is pressed on the upward step surface of the limiting step; The outer peripheral surface of the limiting seat is provided with an avoiding groove corresponding to the first through hole; the avoiding groove extends in the axial direction and penetrates the upper end surface of the limiting seat; the lower end surface of the pressing member is provided with a positioning column corresponding to the avoiding groove; the pressing member is provided with a second through hole; the upper end surface of the limiting seat is provided with a second fixing hole; the second fastener penetrates the second through hole and is fixedly connected with the second fixing hole.

8. The telescopic support device according to claim 7, wherein The movable support assembly further comprises a plurality of bearings, inner rings of the bearings are fixedly arranged on the screw rod; the limiting seat is provided with a bearing chamber matched with the bearings; The limiting seat comprises a core body, a side clamping seat and a guide seat, the side clamping seat and the guide seat are fixedly connected with the core body respectively, the core body is provided with the bearing chamber and a shaft hole matched with the screw rod at a splicing surface of the core body and the side clamping seat; An open-limiting cylinder is formed at an upper end of the core body, the guide seat is embedded in an inner cavity of the open-limiting cylinder, the guide seat is axially slidably matched with an inner wall surface of the open-limiting cylinder and is limitingly matched in a circumferential direction around an axis, a guide cavity is formed at an upper end surface of the guide seat, the clutch seat is axially slidably matched with an inner wall surface of the guide cavity and is limitingly matched in the circumferential direction around the axis, the limiting shoulder is formed on the core body, and the second fixing hole is formed at the upper end surface of the guide seat.

9. The telescoping support apparatus of claim 6, wherein, The limiting seat is provided with a first wire channel penetrating through upper and lower end surfaces thereof, and the upper end surface of the second support member is provided with a second wire channel connected with the first wire channel.

10. The telescoping support apparatus of claim 1, wherein, The second support member is in a cylindrical shape, the second support member is sleeved on an outer periphery of the screw rod, the limiting seat is fixedly embedded in an inner cavity of an upper end of the second support member, the upper end of the limiting seat protrudes from an upper end surface of the second support member, the telescopic support device further comprises an adapter arm and a pressing member, one end of the adapter arm is provided with an adapter cylinder, the adapter cylinder is provided in an open state at two ends, the adapter cylinder is sleeved on the upper end of the limiting seat, and an inner wall surface of the adapter cylinder is provided with a limiting step, the pressing member is fixedly connected with the limiting seat and is pressed on an upward step surface of the limiting step, the adapter arm comprises a main body and a side cover, the main body comprises a long-strip-shaped rod portion and the adapter cylinder arranged at one end of the rod portion, an inner cavity of the rod portion is provided in an open state at one side, the inner cavity of the rod portion is communicated with the inner cavity of the adapter cylinder, and the side cover covers the opening of the rod portion.

11. The telescoping support apparatus of claim 10, wherein, A pressing cavity is formed at a position of the side cover corresponding to the adapter cylinder, the clutch seat is provided with a conducting rod extending upward to the pressing cavity, the switch assembly further comprises a key fixedly arranged at an upper end of the conducting rod, and the key is located in the pressing cavity.

12. The telescoping support apparatus of claim 1, wherein, The second support member is in a cylindrical shape, the second support member is sleeved on an outer periphery of the first support member, the movable support assembly further comprises a sliding guide shoe, the sliding guide shoe is fixedly embedded in an inner cavity of a lower end of the second support member, the sliding guide shoe is formed with a guide hole matched with the first support member, and the sliding guide shoe is axially slidably matched with the static support assembly and is limitingly matched in a circumferential direction around an axis.

13. The telescoping support apparatus of claim 12, wherein, The sliding guide shoe comprises a shoe sleeve and a connecting portion arranged at an outer periphery of one end of the shoe sleeve, the guide hole is formed in an inner cavity of the shoe sleeve, the connecting portion abuts against a lower end surface of the second support member, the connecting portion is provided with a third through hole, the lower end surface of the second support member is provided with a third fixing hole corresponding to the third through hole, and the movable support assembly further comprises a third fastener penetrating through the third through hole and fixedly connected with the third fixing hole.

14. The telescoping support set forth in claim 1 wherein, The static support assembly further comprises a third support member in the shape of a cylinder, which is sleeved on the periphery of the first support member, and the second support member is telescopically arranged between the first support member and the third support member.

15. A telescoping support arrangement according to claim 14, wherein The second support member and the third support member are in axial slidable cooperation and circumferential limiting cooperation around the axis.

16. The telescopic support device according to claim 15, characterized in that, The second support member is in the shape of a cylinder, which is sleeved on the periphery of the first support member; the dynamic support assembly further comprises a sliding guide shoe fixedly embedded in the inner cavity of the lower end of the second support member, the sliding guide shoe comprises a shoe sleeve and a connecting portion provided on the outer periphery of one end of the shoe sleeve, wherein, The shoe sleeve of the sliding guide shoe is formed with a guide hole which is mutually sleeved with the first support member, the connecting portion is abutted against the lower end surface of the second support member, the outer periphery of the connecting portion is provided with a first guide key, and the inner periphery of the third support member is provided with a first guide groove, the first guide groove and the first guide key are in axial slidable cooperation and circumferential limiting cooperation around the axis.

17. A telescoping support arrangement as claimed in claim 16, wherein The limiting seat is provided with a first wire passage which penetrates through the upper and lower end surfaces thereof, the inner wall surface of the second support member is provided with a plurality of second guide keys, the outer periphery of the limiting seat is provided with a plurality of second guide grooves, the second guide grooves and the second guide keys are in axial slidable cooperation and circumferential limiting cooperation around the axis; at least one of the plurality of second guide keys is provided with a second wire passage which is connected with the first wire passage, and the second wire passage penetrates through the upper and lower end surfaces of the second support member.

18. The telescoping support apparatus of claim 17, wherein, The connecting portion is provided with a first wire via hole corresponding to the second wire passage.

19. A telescopic support arrangement as claimed in claim 17 or 18, wherein, The second wire passage is provided with a side opening on the side close to the central axis of the second support member, the side opening extends along the axis and penetrates through the upper and lower end surfaces of the second support member, and the width of the side opening is smaller than the inner diameter of the second wire passage.

20. A telescoping support arrangement according to any one of claims 14 to 16, wherein, The static support assembly further comprises a connecting seat, the connecting seat comprises a connecting column and a spacer provided on one end of the connecting column, the first support member is in the shape of a cylinder, the connecting column is fixedly embedded in the inner cavity of the lower end of the first support member, and the spacer is fixedly embedded in the inner cavity of the lower end of the third support member.

21. A telescoping support arrangement according to claim 20, wherein The spacer is provided with a second wire via hole which communicates with the annular cavity between the first support member and the third support member.

22. A telescoping support arrangement as claimed in any one of claims 1, 4 and 5 wherein, The clutch seat has a sleeve hole which is adapted to the screw rod, the upper end surface of the clutch seat is provided with a clutch chamber which is connected with the sleeve hole, the bottom wall surface of the clutch chamber is formed on the periphery of the sleeve hole, the side wall surface of the clutch chamber is provided with a first limiting tooth, the lower end surface of the clutch cover is provided with a limiting column which is cooperated with the first limiting tooth, and the first limiting tooth and the limiting column are in axial slidable cooperation and circumferential limiting cooperation around the axis.

23. A telescoping support arrangement as claimed in claim 22, wherein, The bottom wall surface of the clutch chamber is provided with an inner limiting ring at the periphery of the sleeve hole, and an annular groove is formed between the inner limiting ring and the inner wall surface of the clutch chamber; the outer peripheral surface of the inner limiting ring is provided with second limiting teeth, the second limiting teeth are slidably matched with the limiting column in the axial direction and are limitingly matched in the circumferential direction around the axis; the limiting column, the first limiting teeth and the second limiting teeth are arranged in an array in the circumferential direction around the axis; when the switch assembly is in the locked state, the limiting column is located in the annular groove, and the limiting column is matched with the first limiting teeth and the second limiting teeth, respectively.

24. A telescoping support arrangement as claimed in any of claims 1 to 18, wherein, The first support is in a cylindrical shape, and the threaded hole of the nut seat is in communication with the inner cavity of the first support.

25. A telescoping support arrangement according to claim 24, wherein The nut seat is fixedly embedded in the inner cavity of the upper end of the first support.

26. An illuminating device comprising a support and a lamp body provided on the support, characterized in that, The support includes the telescopic support device according to any one of claims 1-25.

27. The illumination device of claim 26, wherein The support further includes a base, and the lower end of the first support is fixedly connected with the base.

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