Lifting cylinder assembly of lighting lamp, lifting device and lighting lamp
By combining a lead screw and nut seat with a limit switch and motor drive, precise height adjustment of lighting fixtures is achieved, solving the problems of small adjustment range and unstable limit switch in existing lighting fixtures, and improving the user experience.
Patent Information
- Application Number
- CN202421286410.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-06-05
AI Technical Summary
Existing lighting fixtures have a small adjustment range when adjusting height, making precise adjustment impossible. Furthermore, the limit switch is prone to failure due to pole deflection, resulting in a poor user experience.
It adopts a combination structure of lead screw and nut seat. The nut seat moves continuously on the lead screw and is axially limited at extreme positions by a limiting structure to prevent the nut seat from disengaging from the lead screw. Combined with motor drive, it achieves precise height adjustment.
It enables precise height adjustment of lighting fixtures, expands the adjustment range, prevents support rods from detaching, and improves stability and user experience.
Smart Images
Figure CN223855565U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of lamps, in particular to a lifting cylinder assembly of a lighting lamp, a lifting device and the lighting lamp. BACKGROUND
[0002] For lighting lamps such as table lamps or floor lamps, in order to meet the use requirements of different consumers for height, some lighting lamps are designed to be adjustable in the height direction. When the height of the lighting lamp changes, the illumination intensity and angle at the same position on the ground before and after the height changes will change differently.
[0003] However, the current lighting lamps generally use a telescopic structure similar to an umbrella to realize height adjustment. Only when the elastic sheet is clamped into the corresponding limiting groove, the lighting lamp can be kept in a stable position. This way results in only a few fixed height positions of the lighting lamp, the adjustment range is too small, and more precise adjustment cannot be achieved, resulting in poor user experience. At the same time, when the two relatively telescopic rod bodies are deflected in the circumferential direction, the elastic sheet and the limiting groove will be relatively offset, resulting in the failure to realize the limiting of the height, and even the two rod bodies may be separated. CONTENT OF THE UTILITY MODEL
[0004] The main purpose of the present application is to provide a lifting cylinder assembly of a lighting lamp, a lifting device and the lighting lamp, which aims to realize precise height adjustment while avoiding separation of the lifting cylinder assembly.
[0005] To achieve the above-mentioned purpose, the present application provides a lifting cylinder assembly of a lighting lamp, which comprises:
[0006] a first support rod;
[0007] a second support rod, which is internally and externally sleeved with the first support rod;
[0008] a lead screw, which is arranged in the first support rod;
[0009] a nut seat, which is fixed with the second support rod and is provided with a screw hole sleeved with the lead screw; and
[0010] a limiting structure, which is fixed with the lead screw and laterally protrudes from the lead screw;
[0011] When the lead screw rotates, the nut seat can be driven to move along the length direction of the lead screw, so that the second support rod can be telescoped relative to the first support rod, and the nut seat can abut against the limiting structure when the nut seat moves to a preset position.
[0012] Optionally, the limiting structure comprises a fixed member, a movable member and a spring between the fixed member and the movable member, the fixed member is fixed relative to the screw rod in the length direction, the movable member movably sheaths the screw rod, and the movable member is between the fixed member and the nut seat and can abut against the movable member when the nut seat moves to a preset position.
[0013] Optionally, the screw rod has opposite first and second ends, the first end is in the first support rod, and the second end is in the second support rod.
[0014] The limiting structure at the first end is a first limiting structure, the fixed member of the first limiting structure is a first fixed member, the first fixed member is a non-closed annular plate, and the screw rod is provided with a first annular groove for clamping the first fixed member.
[0015] Optionally, the screw rod has opposite first and second ends, the first end is in the first support rod, and the second end is in the second support rod.
[0016] The limiting structure at the second end is a second limiting structure, the fixed member of the second limiting structure is a second fixed member, one of the second fixed member and the inner wall of the second support rod is provided with a guide protrusion, and the other is provided with a guide groove to slide with the guide protrusion in the length direction of the second support rod.
[0017] Optionally, the second fixed member comprises a fixed body and two limiting plates, the fixed body sheaths the screw rod and is provided with the guide groove, and the two limiting plates clamp the fixed body; the screw rod is provided with a second annular groove, the limiting plate is a non-closed annular plate, and the limiting plate is clamped in the second annular groove.
[0018] Optionally, the screw rod is formed with a stepped surface facing the fixed member, the movable member is between the stepped surface and the fixed member and can abut against the stepped surface.
[0019] Optionally, the nut seat comprises a large-diameter section and a small-diameter section, the large-diameter section has a first end face, and the small-diameter section is connected to the first end face; the second support rod sheaths the small-diameter section, and the end of the second support rod abuts against the first end face.
[0020] Optionally, the inner wall of the second support rod and along the length direction of the second support rod is provided with a guide protrusion, the guide protrusion is hollow, the large-diameter section is provided with a fixing hole penetrating through the first end face, and a fastener is sequentially arranged in the fixing hole and the guide protrusion to fix the large-diameter section and the second support rod.
[0021] The outer peripheral wall of the small-diameter section is formed with a slot passing through both ends thereof, and the slot is adapted to be inserted into the guide protrusion.
[0022] Optionally, the large-diameter section is provided with a wire passing hole passing through both ends thereof, and the outer peripheral wall of the small-diameter section is further provided with a wire passing slot passing through both ends thereof, the wire passing slot being opened and communicated corresponding to the wire passing hole.
[0023] Optionally, the outer peripheral wall of the nut seat is provided with an anti-rotation protrusion, and the inner wall of the first support rod is provided with an anti-rotation groove extending along the length direction of the first support rod, the anti-rotation protrusion and the anti-rotation groove being slidingly matched in the length direction of the first support rod.
[0024] Optionally, the outer peripheral wall of the nut seat is provided with a plurality of reinforcing protrusions at intervals in the circumferential direction, and the protrusion height of the reinforcing protrusions is less than the protrusion height of the anti-rotation protrusion.
[0025] Optionally, the lifting cylinder assembly further comprises a bushing arranged between the first support rod and the second support rod, the first support rod and the second support rod are metal structures, and the bushing is a plastic structure.
[0026] Optionally, the first support rod is sleeved outside the second support rod.
[0027] The bushing comprises a sleeve body portion and a limiting portion, the sleeve body portion is located in the first support rod, and the limiting portion is located outside the first support rod and abuts against the end face of the first support rod; and / or,
[0028] The outer peripheral wall of the bushing is provided with a buckle, and the inner wall of the first support rod is provided with an annular clamping groove in the circumferential direction, the buckle being clamped with the annular clamping groove.
[0029] The application further provides a lifting device, comprising:
[0030] A lifting cylinder assembly of a lighting lamp;
[0031] A base fixed to one end of the first support rod; and
[0032] A motor arranged in the base, the motor being drivingly connected with the lead screw.
[0033] The application further provides a lighting lamp, comprising:
[0034] A lifting device; and
[0035] A lamp body fixed to the end of the second support rod away from the first support rod.
[0036] The technical scheme in the embodiments of the present application, since the mode of the lead screw and the nut seat is adopted, the movement of the nut seat on the lead screw is continuous, when the lead screw stops rotating, the nut seat can stay at the corresponding position of the lead screw, that is, the nut seat can stay at any position on the lead screw, and the adjustment range is relatively wide. Therefore, the user can extend or retract the second supporting rod to any position according to the requirement, and precise height adjustment is realized. The limiting structure can limit the nut seat in the length direction of the lead screw at the limit position, preventing the nut seat from continuing to move to the end of the lead screw, thereby avoiding the nut seat from being separated from the lead screw. This also means that the second supporting rod fixed with the nut seat can be prevented from being separated from the first supporting rod. Moreover, since the limiting structure is fixed with the lead screw and protrudes laterally, and the nut seat is sleeved on the lead screw, no matter how the limiting structure rotates with the lead screw, at the limit position, the nut seat can finally abut against the limiting structure, and this limiting mode has excellent stability and reliability. BRIEF DESCRIPTION OF DRAWINGS
[0037] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed 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 creative effort.
[0038] FIG. 1 The structure schematic diagram of the lighting lamp in the embodiments of the present application is shown in FIG. 1.
[0039] FIG. 2 The sectional view schematic diagram of the lighting lamp in the embodiments of the present application is shown in FIG. 2. FIG. 1
[0040] FIG. 3 The structure schematic diagram of the nut seat in the embodiments of the present application is shown in FIG. 4. FIG. 2
[0041] FIG. 4 The assembly schematic diagram of the lead screw and the limiting structure in the embodiments of the present application is shown in FIG. 5. FIG. 3
[0042] FIG. 5 The enlarged schematic diagram of position B in the embodiments of the present application is shown in FIG. 6. FIG. 2
[0043] FIG. 6 The enlarged schematic diagram of position C in the embodiments of the present application is shown in FIG. 7. FIG. 5
[0044] FIG. 7 The structure schematic diagram of the lead screw in the embodiments of the present application is shown in FIG. 8. FIG. 5
[0045] FIG. 8 The structure schematic diagram of the lead screw in the embodiments of the present application is shown in FIG. 8. FIG. 5
[0046] FIG. 9 is FIG. 8 enlarged view of D in FIG.
[0047] FIG. 10 is FIG. 8 enlarged view of E in FIG.
[0048] FIG. 11 is FIG. 7 schematic view of the structure of the limiting plate in FIG.
[0049] FIG. 12 is a schematic view of the structure of the first support rod in FIG.
[0050] FIG. 13 is FIG. 12 enlarged view of F in FIG.
[0051] FIG. 14 is FIG. 12 schematic view of the first support rod in FIG.
[0052] FIG. 15 is FIG. 1 schematic view of the structure of the second support rod in FIG.
[0053] FIG. 16 is FIG. 15 schematic view of the second support rod in FIG.
[0054] FIG. 17 is FIG. 3 schematic view of the structure of the bushing in FIG.
[0055] FIG. 18 is FIG. 1 schematic view of the internal structure of the base in FIG.
[0056] BRIEF DESCRIPTION OF THE DRAWINGS
[0057] Reference numerals Names Reference numerals Names Reference numerals Names 100 Lifting cylinder assembly 411 First end face 6121 Notch 10 First support rod 412 Fixing hole 50 / 60 Limiting structure 11 Anti-rotation groove 413 Anti-rotation protrusion 51 / 61 Fixing member 12 Annular clamping groove 414 Reinforcing protrusion 52 / 62 Movable member 20 Second support rod 415 Wire passing hole 53 / 63 Spring 21 Guide protrusion 42 Small-diameter section 70 Bushing 30 Lead screw 421 Insertion slot 71 Limiting portion 31 First end 422 Wire passing groove 72 Sleeve portion 32 Second end 50 First limiting structure 721 Buckle 33 First annular groove 51 First fixing member 722 Positioning protrusion 34 Second annular groove 60 Second limiting structure 81 Base 35a / 35b Step face 61 Second fixing member 82 Motor 40 Nut seat 611 Fixed main body 83 Switch button 40a Screw hole 6111 Guide groove 84 Lamp body 41 Large-diameter section 612 Limiting plate 85 Connecting rod DETAILED DESCRIPTION
[0058] 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 part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.
[0059] It should be noted that in the description of the present application, if the terms "first", "second" and the like appear, "first", "second" are only used for convenient description of different components or names, and cannot be understood as indicating or implying the order relationship, relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" appears throughout the text, it means that it includes three parallel solutions, for example, "A and / or B" includes A solution, or B solution, or A and B solutions that meet at the same time.
[0060] Please refer to FIG. 1 The lifting cylinder assembly 100 of the lighting lamp proposed in the embodiments of the present application not only can realize precise height adjustment and has a large height adjustment range, but also can avoid the separation of the two support rods of the lifting cylinder assembly 100.
[0061] Please refer to FIG. 1 to FIG. 4 The lifting cylinder assembly 100 in the embodiments of the present application includes a first support rod 10, a second support rod 20, a lead screw 30 and a nut seat 40. The first support rod 10 and the second support rod 20 are in an inner-outer sleeving manner. The first support rod 10 can be sleeved outside the second support rod 20, or the first support rod 10 extends outside the second support rod 20. The lead screw 30 is arranged in the first support rod 10, and the length direction of the lead screw 30 is the same as the length direction of the first support rod 10. The nut seat 40 is fixed with the second support rod 20, and the nut seat 40 is provided with a screw hole 40 sleeved with the lead screw 30. When the lead screw 30 rotates, the nut seat 40 can be driven to move along the length direction of the lead screw 30, so that the second support rod 20 can be extended or retracted relative to the first support rod 10. In this process, the nut seat 40 only has a translation motion along the length direction of the lead screw 30, and does not rotate with the lead screw 30.
[0062] In this way, by using the lead screw 30 and the nut seat 40, the length adjustment of the lifting cylinder assembly 100 can be realized. When the lifting cylinder assembly 100 is placed vertically and the lamp body 84 is fixed at one end of the first support rod 10 or the second support rod 20, the height of the lamp body 84 relative to the ground or the desktop is adjustable, so it can adapt to the needs of different users for light intensity.
[0063] In addition, due to the use of the lead screw 30 and the nut seat 40, the movement of the nut seat 40 on the lead screw 30 is continuous. When the lead screw 30 stops rotating, the nut seat 40 can stay at the corresponding position of the lead screw 30, that is, the nut seat 40 can stay at any position on the lead screw 30, and the adjustment range is wide. Therefore, the user can extend or retract the second support rod 20 to any position according to the needs, realizing precise height adjustment.
[0064] Please refer to FIG. 5 to FIG. 7Further, the lifting cylinder assembly 100 in the embodiment of the present application further comprises a limiting structure 50 / 60 fixed with the screw rod 30 and protruding laterally from the screw rod 30, which can abut against the limiting structure 50 / 60 when the nut seat 40 moves to the preset position along the screw rod 30.
[0065] In the embodiment, the protruding laterally of the limiting structure 50 / 60 from the screw rod 30 means that the limiting structure 50 / 60 protrudes from the peripheral wall of the screw rod 30, so as to abut against the nut seat 40 and axially limit the nut seat 40.
[0066] When the nut seat 40 moves to the preset position along the screw rod 30 and abuts against the limiting structure 50 / 60, the nut seat 40 stops moving, or the nut seat 40 can stop moving after continuing to move slowly for a certain distance (which will be described in detail in the spring 53 / 63 in the later embodiment), so that the limiting structure 50 / 60 can limit the nut seat 40 in the length direction of the screw rod 30 at the limit position, prevent the nut seat 40 from continuing to move to the end of the screw rod 30, and thus avoid the nut seat 40 from being separated from the screw rod 30. This also means that the second support rod 20 fixed with the nut seat 40 can be prevented from being separated from the first support rod 10. Moreover, since the limiting structure 50 / 60 is fixed with the screw rod 30 and protrudes laterally, and the nut seat 40 is sleeved on the screw rod 30, no matter how the limiting structure 50 / 60 rotates with the screw rod 30, the nut seat 40 can finally abut against the limiting structure 50 / 60 at the limit position, and the limiting mode has excellent stability and reliability.
[0067] The limiting structure 50 / 60 in the embodiment of the present application can be a limiting block fixed with the screw rod 30, which can stop moving when the nut seat 40 contacts the limiting block. Alternatively, the limiting structure 50 / 60 can further comprise a buffer structure, which can obtain a certain buffer by extruding the buffer structure when the nut seat 40 contacts the buffer structure, and continue to move for a small distance.
[0068] In some embodiments, the limiting structure 50 / 60 comprises a fixed part 51 / 61, a movable part 52 / 62, and a spring 53 / 63 between the fixed part 51 / 61 and the movable part 52 / 62, the fixed part 51 / 61 is fixed relative to the screw rod 30 in the length direction, the movable part 52 / 62 is movably sleeved on the screw rod 30, and the movable part 52 / 62 is located between the fixed part 51 / 61 and the nut seat 40 and can abut against the movable part 52 / 62 when the nut seat 40 moves to the preset position. Specifically, in the initial state, the nut seat 40 does not contact the movable part 52 / 62, at this time, the spring 53 / 63 can be in a free state. When the nut seat 40 moves to the preset position along the screw rod 30, the nut seat 40 abuts against the movable part 52 / 62 and pushes the movable part 52 / 62 to move to the side where the fixed part 51 / 61 is located, and the spring 53 / 63 is compressed. In this process, there are two possibilities:
[0069] First, for the manual version, the screw rod 30 is rotated by the user manually, and when the nut seat 40 pushes the movable part 52 / 62 to move, the manual force required at this time obviously increases due to the resistance of the spring 53 / 63, so the user can know that the nut seat 40 is about to move to the limit position according to this judgment, and thus stop rotating the screw rod 30. During the process from the nut seat 40 first contacting the movable part 52 / 62 to the screw rod 30 stopping rotating, due to the buffering effect of the spring 53 / 63, compared with the nut seat 40 directly colliding with the fixed part 51 / 61 to generate a larger impact force, this way of the embodiment makes the user obtain a soft feeling.
[0070] Second, for the electric version, the motor 82 is arranged to drive the screw rod 30 to rotate, and when the nut seat 40 contacts the movable part 52 / 62, the motor 82 stops rotating, but due to the inertia effect, the screw rod 30 will not stop rotating instantaneously, so the arrangement of the movable part 52 / 62 and the spring 53 / 63 can provide a buffering process for the nut seat 40 and the screw rod 30 at this time, avoiding the screw rod 30 from being stuck, and also avoiding the nut seat 40 from directly colliding with the fixed part 51 / 61 to generate a larger noise.
[0071] In the above, the movable part 52 / 62 can be connected with one end of the spring 53 / 63 to realize compression of the spring 53 / 63. If the movable part 52 / 62 is not arranged, the end of the spring 53 / 63 is easy to extend into the screw hole 40, causing the nut seat 40 to be stuck.
[0072] Optionally, the spring 53 / 63 and the fixed part 51 / 61 are sleeved on the screw rod 30.
[0073] In some embodiments, the screw rod 30 has opposite first and second ends 31 and 32, the first end 31 is located in the first support rod 10, and the second end 32 is located in the second support rod 20. Optionally, the first and second ends 31 and 32 are respectively provided with a limiting structure 50 / 60. Alternatively, one of the first and second ends 31 and 32 is provided with a limiting structure 50 / 60. When the first and second ends 31 and 32 are respectively provided with a limiting structure 50 / 60, for better illustration, the limiting structure 50 / 60 provided at the first end 31 is referred to as a first limiting structure 50, and the fixing member 51 / 61 of the first limiting structure 50 is referred to as a first fixing member 51. The limiting structure 50 / 60 provided at the second end 32 is referred to as a second limiting structure 60, and the fixing member 51 / 61 of the second limiting structure 60 is referred to as a second fixing member 61. The first and second fixing members 51 and 61 adopt different structures. Of course, the first and second fixing members 51 and 61 can also adopt the same structure.
[0074] For better illustration, please refer to FIG. 8 and FIG. 9 In some embodiments, the first fixing member 51 is a non-closed annular plate, i.e., the first fixing member 51 is an annular plate with a gap, and the screw rod 30 is provided with a first annular groove 33 for clamping the first fixing member 51. In assembly, the gap of the first fixing member 51 is aligned with the first annular groove 33 on the screw rod 30, the first fixing member 51 is deformed by extrusion, the screw rod 30 is extruded and clamped into the first fixing member 51 from the gap, and the first fixing member 51 is clamped with the first annular groove 33 on the screw rod 30, thereby preventing the first fixing member 51 from moving along the length direction of the screw rod 30. Moreover, the first fixing member 51 can rotate synchronously with the screw rod 30.
[0075] For better illustration, please refer to FIG. 3 , FIG. 7 and FIG. 10 In some embodiments, the second fixing member 61 includes a fixing body 611 and two limiting plates 612, the fixing body 611 is sleeved on the screw rod 30 and is provided with a guide groove 6111, and the two limiting plates 612 clamp the fixing body 611; the screw rod 30 is provided with a second annular groove 34, and the limiting plate 612 is a non-closed annular plate (such as FIG. 11As shown, the limiting plates 612 are clamped in the second annular grooves 34. During assembly, the fixed body 611 is sleeved on the lead screw 30, and the two limiting plates 612 are clamped in the second annular grooves 34 through the notches 6121. The two limiting plates 612 cannot move in the length direction, thus limiting the movement of the fixed body 611 in the length direction. In this embodiment, since the limiting plates 612 are clamped with the second annular grooves 34, the limiting plates 612 rotate synchronously with the lead screw 30. However, the fixed body 611 cannot rotate with the lead screw 30 due to the guiding protrusions 21 and the guiding grooves 6111. In addition, the limiting plates 612 can have the same shape as the first fixing member 51.
[0076] In some embodiments, one of the second fixing member 61 and the inner wall of the second support rod 20 is provided with the guiding protrusions 21 (as shown in FIG. 16 the other is provided with the guiding grooves 6111 to slide with the guiding protrusions 21 in the length direction of the second support rod 20, thus better guiding the extension and retraction of the second support rod 20 and avoiding the shaking of the second support rod 20. At the same time, the second end 32 of the lead screw 30 is supported by the second fixing member 61, avoiding the shaking of the second end 32. In this embodiment, the second fixing member 61 is stationary relative to the lead screw 30 in the length direction, but at least part of the components of the second fixing member 61 do not rotate synchronously with the lead screw 30 due to the cooperation of the guiding protrusions 21 and the guiding grooves 6111. Therefore, the second fixing member 61 can be equivalent to a bearing, which can provide a stable basis for the rotation of the lead screw 30, avoiding or reducing the shaking of the lead screw 30. In summary, the second fixing member 61 plays multiple roles of limiting the nut seat 40, guiding the second support rod 20, and maintaining the rotation stability of the lead screw 30.
[0077] Please refer again to FIG. 6 , FIG. 7 , FIG. 9 and FIG. 10 In some embodiments, the lead screw 30 is formed with a step face 35a / 35b facing the fixing member 51 / 61, and the movable member 52 / 62 is located between the step face 35a / 35b and the fixing member 51 / 61 and can abut against the step face 35a / 35b. The step face 35a / 35b can limit the movable member 52 / 62, avoiding the movable member 52 / 62 from moving to a farther distance in the direction away from the fixing member 51 / 61 and excessively pulling the spring 53 / 63. Specifically, the step face 35a faces the first fixing member 51, and the movable member 52 can abut against the step face 35a; the step face 35b faces the second fixing member 61, and the movable member 62 can abut against the step face 35b.
[0078] The diameter of the screw rod 30 can be varied, for example, the diameter of the middle region of the screw rod 30 is larger, and the diameter of the two ends is smaller, so that the step surface 35a / 35b is formed at the position where the diameter changes. When the movable piece 52 / 62 is sleeved on the two ends with smaller diameter, the movable piece 52 / 62 can abut against the step surface 35a / 35b, thereby limiting the movement of the movable piece 52 / 62 to the middle region with larger diameter. Alternatively, the screw rod 30 is provided with a shoulder to form the step surface 35a / 35b.
[0079] Please refer again to FIG. 4 The nut seat 40 in the embodiment of the application can adopt a structure with the same outer diameter everywhere, for example, similar to a common nut structure. Alternatively, in some embodiments, the nut seat 40 includes a large-diameter section 41 and a small-diameter section 42, the large-diameter section 41 has a first end face 411, and the small-diameter section 42 is connected to the first end face 411, and the threaded hole 40 penetrates the large-diameter section 41 and the small-diameter section 42 in sequence. The second support rod 20 is sleeved outside the small-diameter section 42, and the end of the second support rod 20 abuts against the first end face 411. In the embodiment, the nut seat 40 is provided as the large-diameter section 41 and the small-diameter section 42, so that the nut seat 40 can obtain a larger axial length, and thus the hardness of the nut seat 40 is higher, and the stability is good, and the nut seat 40 is not easy to twist with the screw rod 30. On this basis, the nut seat 40 is further inserted with the second support rod 20 through the small-diameter section 42, and the contact area between the nut seat 40 and the second support rod 20 is larger, and the stability of the installation of the two is higher. At the same time, the large-diameter section 41 is located outside the second support rod 20, and the position of the nut seat 40 and the second support rod 20 can be axially positioned during installation.
[0080] Alternatively, the large-diameter section 41 and the small-diameter section 42 are locked with the second support rod 20 through screws, respectively.
[0081] Of course, in other embodiments, the nut seat 40 is also located entirely outside the second support rod 20.
[0082] Further, the inner wall of the second support rod 20 and along the length direction thereof is provided with a guide protrusion 21 (as shown in FIG. 15 and FIG. 16 The guide protrusion 21 is hollowly arranged, the large-diameter section 41 is provided with a fixing hole 412 penetrating the first end face 411, and a fastener is sequentially arranged in the fixing hole 412 and the guide protrusion 21 to fix the large-diameter section 41 and the second support rod 20. The outer peripheral wall of the small-diameter section 42 is formed with an insertion slot 421 penetrating both ends thereof, and the insertion slot 421 is adaptively inserted with the guide protrusion 21. In addition, the guide protrusion 21 also cooperates with the guide slot 6111 of the second fixing piece 61.
[0083] The guiding protrusion 21 in the embodiment plays multiple roles: first, as a guiding structure cooperating with the guiding groove 6111 of the second fixing member 61, it guides the second fixing member 61 to slide relative to the second support rod 20; second, as an anti-rotation structure cooperating with the nut seat 40, it maintains the stability of the nut seat 40 relative to the second support rod 20 in the circumferential direction; third, as an adapter between the nut seat 40 and the second support rod 20; fourth, by protruding from the second support rod 20, it plays a role similar to a reinforcing rib, can improve the structural strength of the second support rod 20, and avoids directly opening holes in the second support rod 20. Thus, one structure plays the above four roles, reasonably utilizes the structure, and simplifies the structure.
[0084] Please refer again to FIG. 4 、 FIG. 12 to FIG. 14 In some embodiments, the outer circumferential wall of the nut seat 40 is provided with an anti-rotation protrusion 413, and the inner wall of the first support rod 10 is provided with an anti-rotation groove 11 extending along the length direction of the first support rod 10. The anti-rotation protrusion 413 and the anti-rotation groove 11 slide fit in the length direction of the first support rod 10, so that the nut seat 40 can be better guided to slide along the length direction of the first support rod 10, and the nut seat 40 can also be prevented from rotating relative to the first support rod 10.
[0085] Further, the outer circumferential wall of the nut seat 40 is provided with a plurality of reinforcing protrusions 414 spaced apart in the circumferential direction, and the protrusion height of the reinforcing protrusion 414 is less than the protrusion height of the anti-rotation protrusion 413. When installed, the anti-rotation protrusion 413 is embedded in the anti-rotation groove 11, the reinforcing protrusion 414 is in contact with the inner wall of the first support rod 10, and the reinforcing protrusion 414 spaces the outer circumferential wall of the nut seat 40 and the inner wall of the first support rod 10, thereby reducing the contact area between the nut seat 40 and the inner wall of the first support rod 10, and reducing the friction therebetween, so that the nut seat 40 slides more smoothly on the first support rod 10. In addition, the reinforcing protrusion 414 can also strengthen the structure of the nut seat 40.
[0086] Specifically, the large-diameter section 41 is provided with a plurality of anti-rotation protrusions 413, and the plurality of anti-rotation protrusions 413 are spaced apart in the circumferential direction of the nut seat 40. A plurality of reinforcing protrusions 414 are arranged between every two adjacent anti-rotation protrusions 413, and the reinforcing protrusions 414 are distributed on the large-diameter section 41.
[0087] Further, the large-diameter section 41 is provided with a wire passing hole 415 passing through both ends thereof, and the outer circumferential wall of the small-diameter section 42 is also provided with a wire passing groove 422 passing through both ends thereof, and the wire passing groove 422 is correspondingly provided and communicated with the wire passing hole 415. Specifically, the wire passing groove 422 is aligned with the wire passing hole 415 in the length direction of the screw rod 30. The electric connection wire can be sequentially arranged in the wire passing hole 415 and the wire passing groove 422 from bottom to top, and the electric connection wire is guided from the inside of the first support rod 10 to the inside of the second support rod 20.
[0088] Optionally, the shape of the wire passing groove 422 and the shape of the insertion groove 421 are substantially the same, both of which pass through two ends of the small-diameter section 42 respectively, and the wire passing groove 422 and the insertion groove 421 are spaced along the circumference of the small-diameter section 42. When a plurality of wire passing grooves 422 and a plurality of insertion grooves 421 are provided, any one wire passing groove 422 is located between two adjacent insertion grooves 421.
[0089] It should be noted that the length direction of the first support rod 10, the length direction of the second support rod 20, and the length direction of the lead screw 30 are the same.
[0090] Please refer to FIG. 17 Further, the lifting cylinder assembly 100 further comprises a bushing 70 arranged between the first support rod 10 and the second support rod 20, the first support rod 10 and the second support rod 20 are metal structures, and the bushing 70 is a plastic structure. The arrangement of the bushing 70 causes a radial gap between the first support rod 10 and the second support rod 20, i.e. the first support rod 10 and the second support rod 20 are not in direct contact, so there is no friction. If two metal structures slide relative to each other, they are easy to wear and can produce a large noise when the metal collides. After isolation by the plastic structure of the bushing 70, the metal slides on the plastic structure, which can reduce the generation of noise and also can improve the service life of the two metal support rods.
[0091] In some embodiments, the first support rod 10 is sleeved outside the second support rod 20, the bushing 70 comprises a sleeve part 72 and a limiting part 71, the sleeve part 72 is located inside the first support rod 10, and the limiting part 71 is located outside the first support rod 10 and abuts against the end face of the first support rod 10, thereby preventing the bushing 70 from sliding in the first support rod 10. Optionally, the limiting part 71 is annular and the outer peripheral wall of the limiting part 71 is flush with the outer peripheral wall of the first support rod 10. In this embodiment, the second support rod 20 extends into the sleeve part 72 from the limiting part 71, so the sleeve part 72 is sleeved outside the second support rod 20.
[0092] Please refer to FIG. 13 and FIG. 17 In some embodiments, the outer peripheral wall of the bushing 70 is provided with a buckle 721, the inner wall of the first support rod 10 is provided with an annular clamping groove 12 in the circumferential direction, and the buckle 721 is clamped with the annular clamping groove 12. Optionally, the outer peripheral wall of the bushing 70 is provided with a plurality of buckles 721, and the buckles 721 are clamped with the upper and lower groove walls of the annular clamping groove 12, thereby limiting the movement of the bushing 70 in the length direction of the first support rod 10. By using the annular clamping groove 12, the bushing 70 does not need to be positioned in the circumferential direction, and the bushing 70 can be inserted into the first support rod 10 at any angle, so that the buckle 721 can be clamped with the annular clamping groove 12, thereby simplifying the assembly process.
[0093] Further, the outer peripheral wall of the bushing 70 is also provided with a positioning protrusion 722 which is inserted into the anti-rotation groove 11.
[0094] Please refer to FIG. 1 and FIG. 18 The embodiment of the present application also provides a lifting device, which comprises the lifting cylinder assembly 100, the base 81 and the motor 82. The base 81 is fixed to one end of the first support rod 10, and the other end of the first support rod 10 is provided for the second support rod 20 to extend or retract. The motor 82 is arranged in the base 81, and the motor 82 is drivingly connected with the screw rod 30. The specific structure of the lifting cylinder assembly 100 can be referred to the above embodiment, and will not be repeated here.
[0095] Specifically, the motor 82 drives the screw rod 30 to rotate forward, and the screw rod 30 drives the nut seat 40 to move upward, so that the lifting cylinder assembly 100 is elongated. The motor 82 drives the screw rod 30 to rotate reversely, and the screw rod 30 drives the nut seat 40 to move downward, so that the lifting cylinder assembly 100 is shortened. By using the electric mode, more accurate stroke control can be realized.
[0096] Further, the base 81 can be provided with two switch buttons 83, one of which is used to control the motor 82 to rotate forward, and the other of which is used to control the motor 82 to rotate reversely. Of course, in other embodiments, a mobile terminal such as a mobile phone can be used to interact with the lifting device to control the motor 82 to rotate forward and reversely.
[0097] The embodiment of the present application also provides a lighting lamp, which can be a desk lamp or a floor lamp, without specific limitation here. Please refer to FIG. 1 and FIG. 12 The lighting lamp comprises the lifting device and the lamp body 84. The specific structure of the lifting device can be referred to the above embodiment, and will not be repeated here.
[0098] The lamp body 84 is provided with a light emitting element such as an LED. The shape of the lamp body 84 can be a flat rectangular shape, a square shape, a disc shape, a cloud shape or other irregular shapes, without specific limitation here.
[0099] The base 81 is provided with the motor 82, a circuit board and other electronic elements. The base 81 is also provided with a power line to be connected with a commercial power supply, so as to provide power for the motor 82 and the lamp body 84. Of course, a rechargeable battery can be arranged in the base 81. Similarly, the shape of the base 81 can also be a flat cuboid shape, a disc shape or other shapes.
[0100] Taking the up-down direction as an example, the base 81 is arranged at the lowermost position to serve as a support. The lower end of the first support rod 10 is fixed to the base 81, for example, by insertion or screw connection. The lower end of the second support rod 20 is inserted from the upper end of the first support rod 10.
[0101] Further, a connecting rod 85 is further included, the connecting rod 85 extends generally in the transverse direction, one end of the connecting rod 85 is inserted with the upper end of the second supporting rod 20, and the other end of the connecting rod 85 is fixed with the lamp body 84. When the motor 82 drives the second supporting rod 20 to stretch and retract in the first supporting rod 10, the lamp body 84 can be driven to move together, so that the height of the lamp body 84 changes.
[0102] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art will understand that the technical solutions described in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A lift tube assembly of a lighting fixture, comprising: The utility model provides a telescopic support structure, comprising: a first support rod; a second support rod, which is sleeved on the first support rod; a screw rod, which is arranged in the first support rod; a nut seat, which is fixed to the second support rod and is provided with a screw hole sleeved on the screw rod; and a limiting structure, which is fixed to the screw rod and protrudes laterally from the screw rod; when the screw rod rotates, the nut seat can be driven to move along the length direction of the screw rod, so that the second support rod can be telescoped relative to the first support rod, and the nut seat can abut against the limiting structure when the nut seat moves to a preset position.
2. The lift cylinder assembly of the lighting fixture of claim 1, wherein, The limiting structure comprises a fixed part, a movable part and a spring arranged between the fixed part and the movable part, the fixed part is fixed relative to the screw rod in the length direction, the movable part is sleeved on the screw rod, and the movable part is arranged between the fixed part and the nut seat and can abut against the movable part when the nut seat moves to the preset position.
3. The lift cylinder assembly of the lighting fixture of claim 2, wherein, The screw rod has opposite first and second ends, the first end is arranged in the first support rod, and the second end is arranged in the second support rod; the limiting structure arranged at the first end is a first limiting structure, the fixed part of the first limiting structure is a first fixed part, the first fixed part is a non-closed annular plate, and the screw rod is provided with a first annular groove for clamping the first fixed part.
4. The lift cylinder assembly of the lighting fixture of claim 2, wherein, The screw rod has opposite first and second ends, the first end is arranged in the first support rod, and the second end is arranged in the second support rod; the limiting structure arranged at the second end is a second limiting structure, the fixed part of the second limiting structure is a second fixed part, one of the second fixed part and the inner wall of the second support rod is provided with a guide protrusion, and the other is provided with a guide groove matched with the guide protrusion in the length direction of the second support rod.
5. The lift cylinder assembly of the lighting fixture of claim 4, wherein, The second fixed part comprises a fixed main body and two limiting plates, the fixed main body is sleeved on the screw rod and is provided with the guide groove, and the two limiting plates clamp the fixed main body; the screw rod is provided with a second annular groove, the limiting plate is a non-closed annular plate, and the limiting plate is clamped in the second annular groove.
6. The lift cylinder assembly of the lighting fixture of claim 2, wherein, The screw rod is formed with a stepped surface facing the fixed part, the movable part is arranged between the stepped surface and the fixed part and can abut against the stepped surface.
7. The lift cylinder assembly of the lighting fixture of claim 1, wherein, The nut seat comprises a large-diameter section and a small-diameter section, the large-diameter section has a first end face, and the small-diameter section is connected to the first end face; the second support rod is sleeved outside the small-diameter section, and the end of the second support rod abuts against the first end face.
8. The lift cylinder assembly of the lighting fixture of claim 7, wherein, The inner wall of the second support rod is provided with a guide protrusion in the length direction of the second support rod, the guide protrusion is arranged in a hollow mode, the large-diameter section is provided with a fixing hole penetrating through the first end face, and a fastener is sequentially arranged in the fixing hole and the guide protrusion to fix the large-diameter section and the second support rod; the outer peripheral wall of the small-diameter section is formed with an insertion slot penetrating through both ends of the small-diameter section, and the insertion slot is adaptively inserted into the guide protrusion.
9. The lift cylinder assembly of the lighting fixture of claim 7, wherein, The large diameter section is provided with wire through holes passing through both ends thereof, and the outer peripheral wall of the small diameter section is further provided with wire through grooves passing through both ends thereof, which are opened and communicated with the wire through holes.
10. The lift cylinder assembly of the lighting fixture of claim 1, wherein, The outer peripheral wall of the nut seat is provided with an anti-rotation protrusion, and the inner wall of the first support rod is provided with an anti-rotation groove extending along the length direction of the first support rod, and the anti-rotation protrusion and the anti-rotation groove are in sliding fit in the length direction of the first support rod.
11. The lift cylinder assembly of the lighting fixture of claim 10, wherein, The outer peripheral wall of the nut seat is provided with a plurality of reinforcing protrusions at intervals in the circumferential direction, and the protrusion height of the reinforcing protrusions is less than the protrusion height of the anti-rotation protrusion.
12. A lift column assembly for a lighting fixture according to any one of claims 1 to 11, wherein, The lifting cylinder assembly further comprises a bushing arranged between the first support rod and the second support rod, the first support rod and the second support rod are metal structures, and the bushing is a plastic structure.
13. The lift cylinder assembly of the lighting fixture of claim 12, wherein, The first support rod is sleeved outside the second support rod. The bushing comprises a sleeve body portion and a limiting portion, the sleeve body portion is located in the first support rod, and the limiting portion is located outside the first support rod and abuts against the end face of the first support rod; and / or, The outer peripheral wall of the bushing is provided with a buckle, and the inner wall of the first support rod is provided with an annular clamping groove in the circumferential direction, and the buckle is clamped with the annular clamping groove.
14. A lifting device, characterized in that The lifting cylinder assembly of the lighting lamp according to any one of claims 1 to 13; The base is fixed to one end of the first support rod; And The motor is arranged in the base and is drivenly connected with the screw rod. The lifting device according to claim 14; 15. A lighting fixture, characterized by, And The lamp body is fixed to the end of the second support rod away from the first support rod.