Illuminating lamp with adjustable height

Abstract

The invention discloses a height-adjustable illumination lamp, and relates to the technical field of illumination lamps, the height-adjustable illumination lamp comprises a lamp holder, an adjusting mechanism is arranged at the top of the lamp holder, an insect expelling mechanism is arranged in the lamp holder, a dismounting and mounting mechanism is arranged at one end of the adjusting mechanism, and the adjusting mechanism comprises an electric suspension wire. A fixed column is arranged outside the electric suspension wire, a pulley is rotatably connected to the interior of the fixed column, one end of the electric suspension wire is connected with a winding rotating disc, a bottom plate is fixedly connected to the bottom of the winding rotating disc, a volute spiral spring is mounted in the winding rotating disc, and a protective shell is arranged at the top of the bottom plate; according to the illumination lamp with the adjustable height, the height can be adjusted without electric driving or frequent pulling or rotating of a manual telescopic rod, so that a user can easily and rapidly adjust the height of the illumination lamp according to actual needs; and the stability and the stable operation effect of the lamp at different heights are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting fixtures, and in particular to a lighting fixture with adjustable height. Background Art

[0002] LED, a light-emitting diode, is a solid-state semiconductor device that can convert electrical energy into visible light. It can directly convert electricity into light. The heart of an LED is a semiconductor wafer. One end of the wafer is attached to a bracket, one end is the negative electrode, and the other end is connected to the positive electrode of the power supply, so that the whole wafer is encapsulated by epoxy resin. A chandelier refers to a high-class decorative lighting fixture suspended on the indoor ceiling, and its shape is mostly round or rectangular.

[0003] Although traditional fixed chandeliers can meet the basic lighting function, they cannot flexibly adjust the height and position of the light source according to actual needs, which limits the scope of application and flexibility. Currently, several common height adjustment methods on the market include manual telescopic rods, electric drive devices, etc. Among them, the manual telescopic rod changes the length by rotating or pulling to achieve height change. The advantages are low cost and easy operation, but it is not suitable for frequent adjustment; while electric drive uses a motor to drive a lead screw or a gear mechanism to complete the lifting action, which can achieve precise control, but the cost is high and it is not very economical and practical for ordinary consumers. Whether it is a manual or automatic method for adjusting the height of the lighting fixture has certain limitations. Therefore, we urgently need a lighting fixture with adjustable height. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a lighting fixture with adjustable height to solve the problem that there are certain limitations in both manual and automatic methods for adjusting the height of the lighting fixture in the above technical solutions.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: A lighting fixture with adjustable height, including a lamp head, an adjustment mechanism is provided at the top of the lamp head, a pest control mechanism is provided inside the lamp head, and a disassembly and assembly mechanism is provided at one end of the adjustment mechanism; The adjustment mechanism includes an electric suspension wire, a fixing column is provided outside the electric suspension wire, a pulley is rotatably connected inside the fixing column, one end of the electric suspension wire is connected to a wire winding rotating disc, a bottom plate is fixedly connected to the bottom of the wire winding rotating disc, a protective shell is provided at the top of the bottom plate, and a control unit is installed at the top of the bottom plate; The pest control mechanism includes a mounting plate, a support pipe is fixedly communicated with the top of the mounting plate, a support frame is fixedly connected to the top of the support pipe, a plurality of grooves are opened at the top of the support frame, an expelling pipe is fixedly communicated with the top of the support frame, a through hole is opened at the bottom of the groove, and a heat insulation sheet is installed inside the through hole; The disassembly and assembly mechanism includes a connection groove and a connection block. A fixing hole is formed inside the connection groove, a return spring is fixedly connected inside the fixing hole, a clamping block is fixedly connected to the bottom of the return spring, and a pushing block is fixedly connected to the top of the connection block.

[0006] As a preferred embodiment, one end of the electric suspension wire is electrically connected to one end of the lamp cap, and a micro fuse is arranged on the electric suspension wire.

[0007] As a preferred embodiment, a plurality of fixing columns and winding rotating disks are provided. The plurality of fixing columns and winding rotating disks are arranged in an annular array distribution. Mounting holes are formed at the tops of the fixing columns and the protective shell, and a scroll spring is installed inside the winding rotating disk.

[0008] As a preferred embodiment, the control unit includes a housing, and a single-chip microcomputer chip is installed inside the housing.

[0009] As a preferred embodiment, one end of the electric suspension wire is frictionally connected to one end of the pulley, and a wire bundling block is fixedly connected to the outside of the protective shell.

[0010] As a preferred embodiment, the mounting plate is fixedly connected inside the lamp cap, the expelling pipe is annular, and a plurality of air holes are formed in the outside of the expelling pipe.

[0011] As a preferred embodiment, a plurality of support pipes are provided, and the positions of the plurality of support pipes are adapted to the positions of the plurality of grooves.

[0012] As a preferred embodiment, the connection block is fixedly connected to the top of the bottom plate, the connection groove is formed at the bottom of the protective shell, and both ends of the pushing block are arc-shaped.

[0013] The beneficial effects of adopting the above further scheme are: Compared with the prior art, the advantages and positive effects of the present invention are: First, in the present invention, the lamp holder integrates an LED or other light-emitting elements, and the top is connected to an adjusting mechanism. The electric suspension wire adopts a composite structure of a galvanized steel core and an insulating layer. The lower end is connected to the lamp holder, and the upper end is wound around a wire-winding rotating disk and then connected to a power supply to provide support for the lamp holder while supplying power. Inside the fixed column, nylon pulleys for rotational connection support provide low-friction guidance for the electric suspension wire to ensure that the electric suspension wire has no deviation during the lifting process. The wire-winding rotating disk is cast from lightweight aluminum alloy. The central shaft and the bottom plate are connected by a needle roller bearing, and a high-carbon stainless steel scroll spring is pre-installed inside it. The bottom plate provides support for the wire-winding rotating disk and the control unit, and then the bottom plate is connected to the protective shell to protect the wire-winding rotating disk and the control unit through the protective shell. Then, the protective shell and the fixed column are connected to the ceiling by screws and the like. When it is necessary to adjust the height of the lamp holder downward, the lamp holder is pulled by hand to apply a downward force to the lamp holder, thereby pulling the electric suspension wire downward. After the lamp holder reaches the target height, the pulling of the lamp holder is stopped. At this time, the tension of the scroll spring and the weight of the lamp holder itself are rebalanced to achieve force balance, and the lamp holder maintains a constant height. When it is necessary to adjust the height of the lamp holder upward, the lamp holder is lifted upward by hand. At this time, the balance between the weight of the lamp holder itself and the corresponding scroll spring is lost, and the energized electric suspension wire tightens upward to drive the lamp holder to rise. When adjusted to the appropriate height, the lifting of the lamp holder is stopped. The weight of the lamp holder itself matches the corresponding scroll spring to achieve force balance. At this time, the height of the lamp holder remains unchanged, completing the operation of adjusting the lamp holder. There is no need to adjust the height through electric drive or frequent pulling or rotating of a manual telescopic rod, achieving the effect that users can easily and quickly adjust the height of the lighting fixture according to actual needs and ensuring the stability and smooth operation of the fixture at different heights.

[0014] Second, in the present invention, the mounting plate is installed inside the lamp holder by screws, and then a thin-wall nickel-plated copper support tube is arranged to penetrate the mounting plate, so that the heat emitted by the LED lamp in the lamp holder can be driven to the through hole opened at the bottom of the groove through the support tube. Since a heat insulation sheet is installed in the through hole, most of the heat can be insulated. Then, a solid-state insect repellent sheet is installed inside the groove, so that part of the heat passing through the heat insulation sheet appropriately warms up the solid-state insect repellent sheet, which can improve the volatility of active ingredients such as citronella oil and pyrethroids in the insect repellent sheet and enhance the insect repellent effect. Then, the odor enters the expelling tube clamped to the support frame, and through the air holes opened on the outside of the expelling tube, the odor is diverted to the connection part of the lamp holder. Since the expelling tube is arranged in a ring shape, the odor forms a ring-shaped directional gas, thereby preventing flying insects and the like from entering the inside of the lamp holder from the connection part of the lamp holder, achieving the effect of protecting the lamp holder and preventing flying insects from entering the inside of the lamp holder and causing damage to the lamp holder.

[0015] Third, in the present invention, the connecting block at the top of the bottom plate is inserted into the groove at the bottom of the protective shell, and then the bottom plate is rotated to make the bottom plate rotate, thereby driving the connecting block at the top thereof to rotate into the connecting groove, and then the pushing block at the top of the connecting block continues to push the card block. Since the pushing block is arranged in an arc shape, the card block can be lifted up so that the card block enters the fixing hole until the pushing block moves through the fixing hole, and then the card block is pushed down under the action force of the reset spring so that the card block is against the other end of the pushing block, thereby fixing the bottom plate and completing the connection between the bottom plate and the protective shell. When disassembly is required, it is only necessary to rotate the bottom plate in the opposite direction. Since both ends of the pushing block are arranged in an arc shape, the card block can be lifted up again, thereby removing the bottom plate, completing the effect of convenient disassembly and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a height-adjustable lighting fixture; Figure 2 It is a height-adjustable lighting fixture... Schematic diagram of the components and related parts structure; Figure 3 It is a height-adjustable lighting fixture... Schematic diagram of the components and related parts structure; Figure 4 It is a height-adjustable lighting fixture... Schematic diagram of the components and related parts structure; Figure 5 It is a height-adjustable lighting fixture... Schematic diagram of the components and related parts structure; Figure 6 It is a height-adjustable lighting fixture... Schematic diagram of the components and related parts structure; Figure 7 It is a height-adjustable lighting fixture.... Schematic diagram of the components and related parts structure.

[0017] Description of reference numerals: 1. Lamp holder; 2. Adjustment mechanism; 21. Electric suspension wire; 22. Fixed column; 23. Pulley; 24. Winding rotating disk; 25. Bottom plate; 27. Protective shell; 28. Control unit; 29. Shell; 201. Cable harness block; 3. Insect repelling mechanism; 31. Mounting plate; 32. Support pipe; 33. Support frame; 34. Repelling pipe; 35. Heat insulation sheet; 4. Disassembly and assembly mechanism; 41. Connecting block; 42. Return spring; 43. Clamping block; 44. Pushing block. DETAILED DESCRIPTION

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0019] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown in, the present invention provides a technical solution: a lighting fixture with adjustable height, including a lamp head 1, an adjustment mechanism 2 is provided at the top of the lamp head 1, a pest control mechanism 3 is provided inside the lamp head 1, and a disassembly and assembly mechanism 4 is provided at one end of the adjustment mechanism 2; The adjustment mechanism 2 includes an electric suspension wire 21, a fixed column 22 is provided outside the electric suspension wire 21, a pulley 23 is rotatably connected inside the fixed column 22, one end of the electric suspension wire 21 is connected to a wire winding rotating disc 24, a bottom plate 25 is fixedly connected to the bottom of the wire winding rotating disc 24, a protective shell 27 is provided at the top of the bottom plate 25, and a control unit 28 is installed at the top of the bottom plate 25; The lamp holder 1 integrates an LED or other light-emitting elements, and the top is connected to the adjustment mechanism 2. The electric suspension wire 21 adopts a composite structure of a galvanized steel core and an insulating layer. The lower end is connected to the lamp holder 1, and the upper end is wound around the wire winding rotating disk 24 and then connected to the power supply. While providing support for the lamp holder 1, power supply is also carried out. Inside the fixed column 22, the nylon pulley 23 supported by rotational connection provides low-friction guidance for the electric suspension wire 21 to ensure that the electric suspension wire 21 has no deviation during the lifting process. The wire winding rotating disk 24 is cast from lightweight aluminum alloy, and the central shaft is connected to the bottom plate 25 through a needle roller bearing. A high-carbon stainless steel scroll spring is pre-installed inside it. The bottom plate 25 provides support for the wire winding rotating disk 24 and the control unit 28, and then the bottom plate 25 is connected to the protective shell 27. The protective shell 27 protects the wire winding rotating disk 24 and the control unit 28. Then, the protective shell 27 and the fixed column 22 are connected to the ceiling through screws and other objects. When it is necessary to adjust the height of the lamp holder 1 downward, the lamp holder 1 is pulled by hand to apply a downward force to the lamp holder 1, thereby pulling the electric suspension wire 21 downward. After the lamp holder 1 reaches the target height, the pulling of the lamp holder 1 is stopped. At this time, the tension of the scroll spring is rebalanced with the weight of the lamp holder 1 itself to achieve force balance, and the lamp holder 1 keeps its height unchanged. When it is necessary to adjust the height of the lamp holder 1 upward, the lamp holder 1 is lifted upward by hand. At this time, the balance between the weight of the lamp holder 1 itself and the corresponding scroll spring is lost, and the energized electric suspension wire 21 tightens upward, driving the lamp holder 1 to rise. When adjusted to the appropriate height, the lifting of the lamp holder 1 is stopped. The weight of the lamp holder 1 itself matches the corresponding scroll spring to achieve force balance. At this time, the height of the lamp holder 1 remains unchanged, completing the operation of adjusting the lamp holder 1. There is no need to adjust the height through electric drive or frequent pulling or rotating of a manual telescopic rod, achieving the effect that users can easily and quickly adjust the height of the lighting fixture according to actual needs and ensuring the stability and smooth operation of the fixture at different heights.

[0020] The insect repelling mechanism 3 includes a mounting plate 31. The top of the mounting plate 31 is fixedly communicated with a support pipe 32. The top of the support pipe 32 is fixedly connected to a support frame 33. A plurality of grooves are opened at the top of the support frame 33. The top of the support frame 33 is fixedly communicated with a repelling pipe 34. Through holes are opened at the bottom of the grooves, and a heat insulation sheet 35 is installed inside the through holes. The mounting plate 31 is installed inside the lamp head 1 through screws. Then, by arranging a support tube 32 made of thin-walled nickel-plated copper to penetrate the mounting plate 31, the heat dissipated by the LED lamp in the lamp head 1 can be driven to the through-hole opened at the bottom of the groove through the support tube 32. Since a heat insulation sheet 35 is installed in the through-hole, most of the heat can be insulated. Then, a solid insect repellent sheet is installed inside the groove, so that part of the heat passing through the heat insulation sheet 35 appropriately heats up the solid insect repellent sheet, which can improve the volatility of the active ingredients such as citronella oil and pyrethroids in the insect repellent sheet and enhance the insect repellent effect. Then, the odor enters the expelling tube 34 clamped with the support frame 33, and through the air holes opened on the outside of the expelling tube 34, the odor is guided to the connection part of the lamp head 1. Since the expelling tube 34 is arranged in a ring shape, the odor forms a ring-shaped directional gas, thereby preventing flying insects and the like from entering the inside of the lamp head 1 from the connection part of the lamp head 1, achieving the effect of protecting the lamp head 1 and preventing flying insects from entering the inside of the lamp head 1 and causing damage to the lamp head 1.

[0021] The disassembly and assembly mechanism 4 includes a connection groove and a connection block 41. A fixing hole is opened on the inner side of the connection groove, a reset spring 42 is fixedly connected to the inner side of the fixing hole, a clamping block 43 is fixedly connected to the bottom of the reset spring 42, and a pushing block 44 is fixedly connected to the top of the connection block 41.

[0022] By inserting the connection block 41 at the top of the bottom plate 25 into the groove at the bottom of the protective shell 27, and then rotating the bottom plate 25, the bottom plate 25 rotates, thereby driving the connection block 41 at its top to rotate into the connection groove. Then, the pushing block 44 at the top of the connection block 41 continues to push the clamping block 43. Since the pushing block 44 is arranged in an arc shape, the clamping block 43 can be lifted, so that the clamping block 43 enters the fixing hole until the pushing block 44 moves past the fixing hole. Then, under the action of the reset spring 42, the clamping block 43 is pushed down, so that the clamping block 43 abuts against the other end of the pushing block 44, thereby fixing the bottom plate 25 and completing the connection between the bottom plate 25 and the protective shell 27. When disassembly is required, just rotate the bottom plate 25 in the reverse direction. Since both ends of the pushing block 44 are arranged in an arc shape, the clamping block 43 can be lifted again, thereby removing the bottom plate 25 and achieving the effect of convenient disassembly and installation.

[0023] Specifically, one end of the electric suspension wire 21 is electrically connected to one end of the lamp head 1, and a micro fuse is arranged on the electric suspension wire 21.

[0024] Through the above technical solution, the electric suspension wire 21 is made of a galvanized steel core wrapped with a highly insulating TPU material, and its lower end is electrically connected to the LED drive module of the lamp head 1 through a waterproof terminal, ensuring power supply stability and waterproof performance. At the same time, a micro self - resetting fuse is integrated inside the electric suspension wire 21. When the current in the lamp exceeds the threshold due to short - circuit or overload, the fuse instantly melts and cuts off the circuit, preventing the risk of fire caused by overheating of the circuit.

[0025] Specifically, there are multiple fixing columns 22 and winding rotating disks 24, and the multiple fixing columns 22 and winding rotating disks 24 are both arranged in an annular array distribution. Installation holes are provided at the tops of the fixing columns 22 and the protective housing 27, and a volute spring is installed inside the winding rotating disk 24.

[0026] Through the above technical solution, multiple fixing columns 22 and winding rotating disks 24 are provided, so that multiple groups of lamps can be installed. Then, through the installation holes provided at the tops of the fixing columns 22 and the protective housing 27, the fixing columns 22 and the protective housing 27 can be connected to the ceiling.

[0027] Specifically, the control unit 28 includes a housing 29, and a single-chip microcomputer chip is installed inside the housing 29.

[0028] Through the above technical solution, the housing 29 can protect the single-chip microcomputer chip from dust interference. Then, through the set single-chip microcomputer chip, the brightness and color of the light can be controlled. The single-chip microcomputer chip is a prior art, and its working principle is well-known to those skilled in the art, so it will not be described in detail.

[0029] Specifically, one end of the electric suspension wire 21 is frictionally connected to one end of the pulley 23, and a wire bundling block 201 is fixedly connected to the outside of the protective housing 27.

[0030] Through the above technical solution, by selecting a wear-resistant and high-temperature-resistant plastic product for the pulley 23, low-friction guiding can be provided for the electric suspension wire 21, ensuring that the electric suspension wire 21 has no deviation during the lifting and lowering process. Then, through the wire bundling block 201, the electric suspension wire 21 can pass through the wire bundling block 201, ensuring the stability of the electric suspension wire 21 when it is retracted and extended.

[0031] Specifically, the mounting plate 31 is fixedly connected inside the lamp head 1, the repelling tube 34 is arranged in a ring shape, and a plurality of air holes are provided on the outside of the repelling tube 34.

[0032] Through the above technical solution, the repelling tube 34 is arranged in a ring-shaped tube, and air holes are circumferentially provided along the connection seam of the lamp head 1, so that the insect repelling gas can form a ring-shaped directional gas, thereby better preventing insects.

[0033] Specifically, there are multiple support tubes 32, and the positions of the multiple support tubes 32 are adapted to the positions of the multiple grooves.

[0034] Through the above technical solution, the support tubes 32 made of thin-walled nickel-plated copper are used to penetrate the mounting plate 31 in an annular array manner, and each support tube 32 corresponds to a groove on the support frame 33, so that more insect repelling tablets can be installed.

[0035] Specifically, the connecting block 41 is fixedly connected to the top of the bottom plate 25. The connecting groove is opened at the bottom of the protective shell 27. The clamping block 43 is L-shaped, and both ends of the pushing block 44 are arc-shaped. Through the above technical solution, since both ends of the pushing block 44 are arc-shaped, when the bottom plate 25 rotates and enters, the pushing block 44 jacks up the clamping block 43 until it falls into the position between the pushing block 44 and the connecting block 41. When disassembling, rotate the bottom plate 25 in the reverse direction, and the arc-shaped surface on the other side of the pushing block 44 pushes open the clamping block 43, thereby achieving the effect of quick disassembly.

[0036] Working principle: The lamp head 1 integrates an LED or other light-emitting elements, and the adjusting mechanism 2 is connected to the top. The electric suspension wire 21 adopts a composite structure of a galvanized steel core and an insulating layer. The lower end is connected to the lamp head 1, and the upper end is wound around the wire winding rotating disc 24 and then connected to the power supply. While providing support for the lamp head 1, it also supplies power. Inside the fixed column 22, the nylon pulley 23 that is rotationally connected and supported provides low-friction guidance for the electric suspension wire 21 to ensure that the electric suspension wire 21 has no deviation during the lifting process. The wire winding rotating disc 24 is cast from lightweight aluminum alloy, and the central axis is connected to the bottom plate 25 through a needle roller bearing. A high-carbon stainless steel scroll spring is pre-installed inside it. The bottom plate 25 provides support for the wire winding rotating disc 24 and the control unit 28, and then the bottom plate 25 is connected to the protective shell 27. The protective shell 27 protects the wire winding rotating disc 24 and the control unit 28. Then, the protective shell 27 and the fixed column 22 are connected to the ceiling through screws and other objects. When it is necessary to adjust the height of the lamp head 1 downward, pull the lamp head 1 by hand to give the lamp head 1 a downward force, thereby pulling the electric suspension wire 21 to descend. After the lamp head 1 reaches the target height, stop pulling the lamp head 1. At this time, the tension of the scroll spring and the weight of the lamp head 1 itself are rebalanced to achieve force balance, and the lamp head 1 remains at a constant height. When it is necessary to adjust the height of the lamp head 1 upward, support the lamp head 1 upward with your hand. At this time, the balance between the weight of the lamp head 1 itself and the corresponding scroll spring is lost, and the energized electric suspension wire 21 tightens upward, driving the lamp head 1 to rise. When adjusted to the appropriate height, stop supporting the lamp head 1. The weight of the lamp head 1 itself matches the corresponding scroll spring to achieve force balance. At this time, the height of the lamp head 1 remains unchanged, completing the operation of adjusting the lamp head 1. There is no need to adjust the height through electric drive or frequent pulling or rotating of a manual telescopic rod, achieving the effect that users can easily and quickly adjust the height of the lighting fixture according to actual needs and ensure the stability and smooth operation of the fixture at different heights.

[0037] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An illumination fixture with adjustable height, comprising a lamp head (1), characterized in that: A regulating mechanism (2) is provided at the top of the lamp cap (1), a pest control mechanism (3) is provided inside the lamp cap (1), and a disassembly and assembly mechanism (4) is provided at one end of the regulating mechanism (2). The regulating mechanism (2) includes an electric suspension wire (21), a fixing column (22) is arranged outside the electric suspension wire (21), a pulley (23) is rotatably connected inside the fixing column (22), one end of the electric suspension wire (21) is connected to a wire winding rotating disc (24), a bottom plate (25) is fixedly connected to the bottom of the wire winding rotating disc (24), a protective shell (27) is arranged on the top of the bottom plate (25), and a control unit (28) is installed on the top of the bottom plate (25). The pest control mechanism (3) includes a mounting plate (31), a support pipe (32) is fixedly communicated with the top of the mounting plate (31), a support frame (33) is fixedly connected to the top of the support pipe (32), a plurality of grooves are formed in the top of the support frame (33), an expelling pipe (34) is fixedly communicated with the top of the support frame (33), through holes are formed in the bottom of the grooves, and a heat insulation sheet (35) is installed inside the through holes. The disassembly and assembly mechanism (4) includes a connection groove and a connection block (41), a fixing hole is formed inside the connection groove, a return spring (42) is fixedly connected inside the fixing hole, a clamping block (43) is fixedly connected to the bottom of the return spring (42), and a pushing block (44) is fixedly connected to the top of the connection block (41).

2. The height-adjustable lighting fixture according to claim 1, wherein: One end of the electric suspension wire (21) is electrically connected to one end of the lamp cap (1), and a micro fuse is arranged on the electric suspension wire (21).

3. The adjustable-height lighting fixture according to claim 1, wherein: Both the fixing column (22) and the wire winding rotating disc (24) are provided with a plurality of them, and the plurality of fixing columns (22) and wire winding rotating discs (24) are arranged in an annular array distribution. Mounting holes are formed in the tops of the fixing column (22) and the protective shell (27), and a scroll spring is installed inside the wire winding rotating disc (24).

4. The adjustable-height lighting fixture according to claim 1, characterized in that: The control unit (28) includes a housing (29), and a single-chip microcomputer chip is installed inside the housing (29).

5. The adjustable-height lighting fixture according to claim 1, wherein: One end of the electric suspension wire (21) is frictionally connected to one end of the pulley (23), and a wire bundling block (201) is fixedly connected to the outside of the protective shell (27).

6. The height-adjustable lighting fixture according to claim 1, wherein: The mounting plate (31) is fixedly connected inside the lamp cap (1), the expelling pipe (34) is annular, and a plurality of air holes are formed in the outside of the expelling pipe (34).

7. The height-adjustable lighting fixture according to claim 1, wherein: A plurality of support pipes (32) are provided, and the positions of the plurality of support pipes (32) are adapted to the positions of the plurality of grooves.

8. The adjustable-height lighting fixture according to claim 1, wherein: The connection block (41) is fixedly connected to the top of the bottom plate (25), the connection groove is formed in the bottom of the protective shell (27), and both ends of the pushing block (44) are arc-shaped.

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