A height adjustable lighting fixture

Abstract

The application discloses a height-adjustable lighting lamp and relates to the technical field of lighting lamps, which comprises a lamp head, an adjusting mechanism arranged at the top of the lamp head, a pest expelling mechanism arranged in the lamp head, a dismounting mechanism arranged at one end of the adjusting mechanism, an electric pendant wire, a fixing column arranged outside the electric pendant wire, a pulley rotatably connected to the inside of the fixing column, a winding rotating disc connected to one end of the electric pendant wire, a bottom plate fixedly connected to the bottom of the winding rotating disc, a vortex spring installed in the inside of the winding rotating disc, a protective shell arranged at the top of the bottom plate, and a control unit installed at the top of the bottom plate. The height-adjustable lighting lamp does not need to be adjusted in height through electric driving or frequent pulling or rotating of a manual telescopic rod, so that the height of the lighting lamp can be easily and quickly adjusted according to actual needs, and the stability and smooth operation of the lighting lamp at different heights are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lighting lamps, in particular to a height-adjustable lighting lamp. BACKGROUND

[0002] LED, light-emitting diode, is a kind of solid-state semiconductor device that can convert electrical energy into visible light, it can directly convert electricity into light, the heart of LED is a semiconductor wafer, one end of the wafer is attached to a bracket, one end is negative, the other end is connected to the positive of the power supply, so that the entire wafer is encapsulated with epoxy resin, a pendant light refers to a high-grade decorative lighting lamp hung on the ceiling of a room, which is usually round or rectangular in shape.

[0003] Although the traditional fixed pendant light can meet the basic lighting function, it cannot flexibly adjust the height and position of the light source according to actual needs, which limits the scope of application and flexibility. The height adjustment methods commonly used in the market include manual telescopic rod and electric drive device. The manual telescopic rod changes the length by rotating or pulling to realize the change of height, which has the advantages of low cost and easy operation, but is not suitable for frequent adjustment. The electric drive uses a motor to drive a lead screw or a gear mechanism to complete the lifting action, which can realize accurate control, but the cost is high, and it is not economical and practical for ordinary consumers. Whether it is manual or automatic adjustment of the height of the lamp, there are certain limitations. Therefore, we need a height-adjustable lighting lamp. SUMMARY

[0004] The purpose of the present application is to solve the problems in the prior art, and to provide a height-adjustable lighting lamp to solve the problem that the height of the lamp cannot be adjusted manually or automatically.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: a height-adjustable lighting lamp, comprising a lamp head, the top of the lamp head is provided with an adjusting mechanism, the inside of the lamp head is provided with an insect expelling mechanism, one end of the adjusting mechanism is provided with a dismounting mechanism;

[0006] The adjusting mechanism comprises an electric pendant line, the outer part of the electric pendant line is provided with a fixed column, the inside of the fixed column is rotatably connected with a pulley, one end of the electric pendant line is connected with a winding rotating disc, the bottom of the winding rotating disc is fixedly connected with a bottom plate, the top of the bottom plate is provided with a protective shell, and the top of the bottom plate is provided with a control unit;

[0007] The installation plate is fixedly connected in the inside of the lamp holder, the repelling pipe is arranged in a ring shape, and a plurality of air holes are formed in the outside of the repelling pipe.

[0008] The dismounting mechanism comprises a connecting groove and a connecting block, a fixing hole is formed in the inner side of the connecting groove, a return spring is fixedly connected to the inner side of the fixing hole, the bottom of the return spring is fixedly connected with a clamping block, and the top of the connecting block is fixedly connected with a pushing block.

[0009] As a preferred implementation form, one end of the electric pendant wire is electrically connected with one end of the lamp holder, and a micro fuse is arranged on the electric pendant wire.

[0010] As a preferred implementation form, a plurality of the fixing columns and the winding rotating discs are arranged, the fixing columns and the winding rotating discs are arranged in a ring array, the top of the fixing column and the protective shell is formed with a mounting hole, and the inside of the winding rotating disc is mounted with a volute spring.

[0011] As a preferred implementation form, the control unit comprises a shell, and a single-chip microcomputer chip is mounted in the inside of the shell.

[0012] As a preferred implementation form, one end of the electric pendant wire is frictionally connected with one end of the pulley, and the outside of the protective shell is fixedly connected with a wire binding block.

[0013] As a preferred implementation form, the installation plate is fixedly connected in the inside of the lamp holder, the repelling pipe is arranged in a ring shape, and a plurality of air holes are formed in the outside of the repelling pipe.

[0014] As a preferred implementation form, a plurality of the support pipes are arranged, and the positions of the plurality of support pipes are matched with the positions of the plurality of grooves.

[0015] As a preferred implementation form, the connecting block is fixedly connected to the top of the bottom plate, the connecting groove is formed in the bottom of the protective shell, and the two ends of the pushing block are arranged in an arc shape.

[0016] The beneficial effects of the above further scheme are:

[0017] Compared with the prior art, the application has the advantages and positive effects that:

[0018] First, in the application, the lamp holder integrates LED or other light-emitting elements, the top is connected to the adjusting mechanism, the electric pendant wire adopts a composite structure of galvanized steel core and insulating layer, the lower end is connected to the lamp holder, and the upper end is wound on the winding rotating disc, and then connected to the power supply, providing support for the lamp holder while supplying power, the fixed column provides low-friction guidance for the electric pendant wire through the rotating connection of the supporting nylon pulley in the fixed column, ensuring that the electric pendant wire does not deviate during lifting, the winding rotating disc is made of lightweight aluminum alloy, the center shaft is connected to the bottom plate through a needle bearing, a high-carbon stainless steel spiral spring is preinstalled inside, the bottom plate provides support for the winding rotating disc and the control unit, then the bottom plate is connected to the protective shell, the winding rotating disc and the control unit are protected by the protective shell, and then the protective shell and the fixed column are connected to the ceiling through screws and other objects, when the lamp holder height needs to be adjusted downward, the lamp holder is pulled by hand to provide a downward force to the lamp holder, thereby pulling the electric pendant wire down, when the lamp holder reaches the target height, stop pulling the lamp holder, at this time the tension of the spiral spring and the weight of the lamp holder are rebalanced to achieve force balance, the lamp holder maintains the same height, when the lamp holder height needs to be adjusted upward, the lamp holder is held upward by hand, at this time the weight of the lamp holder and the corresponding spiral spring are out of balance, the electrified electric pendant wire is tightened upward, driving the lamp holder to rise, when the height is adjusted to the appropriate height, stop holding the lamp holder, the weight of the lamp holder and the corresponding spiral spring are matched to achieve force balance, at this time the lamp holder height remains unchanged, completing the operation of adjusting the lamp holder, without the need for electric drive or frequent pulling or rotating manual telescopic rod to adjust the height, so 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 lamp at different heights.

[0019] Second, in the application, the mounting plate is installed in the interior of the lamp holder by screws, and a thin-walled nickel-plated copper support pipe is provided to penetrate the mounting plate, so that the heat emitted by the LED lamp in the lamp holder can be carried by the support pipe to the through hole at the bottom of the groove, and since a heat insulation sheet is installed in the through hole, most of the heat can be insulated, and then a solid insect-repelling sheet is installed in the interior of the groove, so that the heat that passes through the heat insulation sheet can properly heat the solid insect-repelling sheet, improving the volatility of effective ingredients such as citronella oil and pyrethroids in the insect-repelling sheet, enhancing the insect-repelling effect, and then the odor enters the repelling pipe that is clamped with the support frame, and the odor is guided to the connection of the lamp holder through the air permeable hole provided on the outer side of the repelling pipe, since the repelling pipe is arranged in a ring shape, the odor forms a ring-shaped directional gas, thereby preventing flying insects from entering the interior of the lamp holder from the connection of the lamp holder, achieving the effect of protecting the lamp holder and preventing flying insects from entering the interior of the lamp holder and causing damage to the lamp holder.

[0020] Third, in this invention, the connecting block at the top of the base plate is inserted into the groove at the bottom of the protective shell, and then the base plate is rotated, causing the connecting block at its top to rotate and enter the connecting groove. Then, the pushing block at the top of the connecting block continues to push the locking block. Since the pushing block is set to an arc shape, it can lift the locking block, allowing the locking block to enter the fixing hole until the pushing block moves past the fixing hole. Then, under the action of the return spring, the locking block is pushed down, causing the locking block to abut against the other end of the pushing block, thereby fixing the base plate and completing the connection between the base plate and the protective shell. When disassembly is required, simply rotate the base plate in the opposite direction. Since both ends of the pushing block are set to an arc shape, the locking block can be lifted again, thereby removing the base plate and achieving the effect of convenient disassembly and installation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a height-adjustable lighting fixture;

[0022] Figure 2 This is a height-adjustable lighting fixture... Schematic diagram of components and related parts;

[0023] Figure 3 This is a height-adjustable lighting fixture... Schematic diagram of components and related parts;

[0024] Figure 4 This is a height-adjustable lighting fixture... Schematic diagram of components and related parts;

[0025] Figure 5 This is a height-adjustable lighting fixture... Schematic diagram of components and related parts;

[0026] Figure 6 This is a height-adjustable lighting fixture... Schematic diagram of components and related parts;

[0027] Figure 7 This is a height-adjustable lighting fixture... Schematic diagram of components and related parts.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Lamp holder;

[0030] 2. Adjustment mechanism; 21. Electric suspension wire; 22. Fixed column; 23. Pulley; 24. Winding disc; 25. Base plate; 27. Protective shell; 28. Control unit; 29. ​​Outer shell; 201. Cable bundle;

[0031] 3. Insect repellent mechanism; 31. Mounting plate; 32. Support tube; 33. Support frame; 34. Repellent tube; 35. Heat insulation sheet;

[0032] 4, dismounting mechanism; 41, connecting block; 42, reset spring; 43, clamping block; 44, pushing block. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a 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 of ordinary skill in the art without creative work fall within the scope of protection of the present application. EMBODIMENT

[0034] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , the present application provides a technical solution: a height-adjustable lighting lamp, comprising a lamp head 1, the top of the lamp head 1 is provided with an adjusting mechanism 2, the inside of the lamp head 1 is provided with an insect expelling mechanism 3, one end of the adjusting mechanism 2 is provided with a dismounting mechanism 4;

[0035] The adjusting mechanism 2 comprises an electric cord 21, the outside of the electric cord 21 is provided with a fixed column 22, the inside of the fixed column 22 is rotatably connected with a pulley 23, one end of the electric cord 21 is connected with a winding rotating disc 24, the bottom of the winding rotating disc 24 is fixedly connected with a bottom plate 25, the top of the bottom plate 25 is provided with a protective shell 27, and the top of the bottom plate 25 is installed with a control unit 28;

[0036] The lamp holder 1 is integrated with LED or other light emitting elements, the top is connected with the adjusting mechanism 2, the electric pendant wire 21 adopts a composite structure of galvanized steel core and insulation layer, the lower end is connected with the lamp holder 1, the upper end is wound on the winding rotating disc 24, and then is connected with the power supply, the lamp holder 1 is provided with support, at the same time, power supply is conducted, the nylon pulley 23 supported by the rotating connection in the fixed column 22 provides low friction guidance for the electric pendant wire 21, ensures that the electric pendant wire 21 does not deviate in the lifting process, the winding rotating disc 24 is made of light aluminum alloy, the center shaft is connected with the bottom plate 25 through the needle bearing, the inside is preinstalled with high carbon stainless steel spiral spring, the bottom plate 25 provides support for the winding rotating disc 24 and the control unit 28, then the bottom plate 25 is connected with the protective shell 27, the winding rotating disc 24 and the control unit 28 are protected through the protective shell 27, then the protective shell 27 and the fixed column 22 are connected with the ceiling through screws and the like, when it is needed to adjust the height of the lamp holder 1 downward, the lamp holder 1 is pulled by hand, a downward force is given to the lamp holder 1, and then the electric pendant wire 21 is pulled down, after the lamp holder 1 is lowered to the target height, the lamp holder 1 is stopped, at this time, the tension of the spiral spring and the weight of the lamp holder 1 are rebalanced, force balance is realized, and the height of the lamp holder 1 remains unchanged, when it is needed to adjust the height of the lamp holder 1 upward, the lamp holder 1 is held upward by hand, at this time, the weight of the lamp holder 1 and the corresponding spiral spring are out of balance, the electrified electric pendant wire 21 is tightened upward, and the lamp holder 1 is lifted, when the height is adjusted to the appropriate height, the lamp holder 1 is stopped, the weight of the lamp holder 1 and the corresponding spiral spring are matched, force balance is realized, at this time, the height of the lamp holder 1 remains unchanged, the operation of adjusting the lamp holder 1 is completed, it is not necessary to adjust the height through electric drive or frequent pulling or rotating manual telescopic rod, the user can easily and quickly adjust the height of the lighting lamp according to actual needs, and the stability and smooth running effect of the lamp at different heights are ensured.

[0037] The insect expelling mechanism 3 comprises a mounting plate 31, a support pipe 32 is fixedly connected in communication at the top of the mounting plate 31, a support frame 33 is fixedly connected at the top of the support pipe 32, a plurality of grooves are formed at the top of the support frame 33, a drive pipe 34 is fixedly connected in communication at the top of the support frame 33, a through hole is formed at the bottom of the groove, and a heat insulation sheet 35 is installed in the through hole;

[0038] The mounting plate 31 is mounted in the lamp holder 1 by screws, and then the thin-walled nickel-plated copper support pipe 32 is arranged to penetrate the mounting plate 31, so that the heat emitted by the LED lamp in the lamp holder 1 can be brought out through the through hole at the bottom of the groove by the support pipe 32, and since the heat insulation sheet 35 is installed in the through hole, most of the heat can be insulated, and then the solid insect repellent sheet is installed in the inside of the groove, so that the heat that passes through the heat insulation sheet 35 can properly heat the solid insect repellent sheet, which can improve the volatility of effective ingredients such as citronella oil and pyrethroid in the insect repellent sheet, and enhance the insect repellent effect, and then the smell enters the repelling pipe 34 clamped with the support frame 33, and is guided to the connection of the lamp holder 1 through the air permeable hole on the outside of the repelling pipe 34, and since the repelling pipe 34 is arranged in a ring shape, the smell forms a ring-shaped directional gas, thereby preventing flying insects from entering the inside of the lamp holder 1 from the connection of the lamp holder 1, achieving the effect of protecting the lamp holder 1 and preventing flying insects from entering the inside of the lamp holder 1, causing damage to the lamp holder 1.

[0039] The dismounting mechanism 4 comprises a connecting groove and a connecting block 41, the inner side of the connecting groove is provided with a fixing hole, the inner side of the fixing hole is fixedly connected with a return spring 42, the bottom of the return spring 42 is fixedly connected with a clamping block 43, and the top of the connecting block 41 is fixedly connected with a pushing block 44.

[0040] The connecting block 41 at the top of the bottom plate 25 is inserted into the groove at the bottom of the protective shell 27, and then the bottom plate 25 is rotated, so that the connecting block 41 at the top of the bottom plate 25 is rotated into the connecting groove, and then the pushing block 44 at the top of the connecting block 41 continues to push the clamping block 43, and 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, and then the clamping block 43 is pushed down under the action of the return spring 42, 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 of the bottom plate 25 and the protective shell 27, and when dismounting is needed, the bottom plate 25 can be dismounted by reversing the rotation of the bottom plate 25, since the two ends of the pushing block 44 are arranged in an arc shape, the clamping block 43 can be lifted again, thereby achieving the effect of convenient dismounting and mounting.

[0041] Specifically, one end of the electric pendant wire 21 is electrically connected with one end of the lamp holder 1, and a micro fuse is arranged on the electric pendant wire 21.

[0042] Through the above technical solution, the electric pendant wire 21 adopts a galvanized steel core wrapped with high-insulation TPU material, and the lower end thereof is electrically connected with the LED driving module of the lamp holder 1 through a waterproof terminal, thereby ensuring the stability of power supply and waterproof performance, and at the same time, the electric pendant wire 21 is internally integrated with a micro self-recovery fuse, which is instantaneously fused and cuts off the circuit when the current exceeds the threshold value due to short circuit or overload of the lamp, thereby preventing the risk of fire caused by overheating of the circuit.

[0043] Specifically, the fixing column 22 and the winding rotating disc 24 are both provided with multiple, the multiple fixing columns 22 and the winding rotating disc 24 are both arranged in an annular array, the top of the fixing column 22 and the protective shell 27 is provided with a mounting hole, and the inside of the winding rotating disc 24 is provided with a volute spring.

[0044] Through the above technical scheme, the fixing column 22 and the winding rotating disc 24 are both provided with multiple, so that multiple groups of lamps can be installed, and then through the mounting hole provided at the top of the fixing column 22 and the protective shell 27, the fixing column 22 and the protective shell 27 can be connected with the ceiling.

[0045] Specifically, the control unit 28 comprises a shell 29, and a single-chip microcomputer chip is installed in the shell 29.

[0046] Through the above technical scheme, the single-chip microcomputer chip can be protected by the shell 29, preventing dust from affecting, and the light brightness and color can be controlled by the single-chip microcomputer chip, which is a prior art, and its working principle is known to those skilled in the art, so it will not be described in detail.

[0047] Specifically, one end of the electric hoisting wire 21 is frictionally connected with one end of the pulley 23, and the protective shell 27 is fixedly connected with a wire bundling block 201 outside.

[0048] Through the above technical scheme, the pulley 23 is made of wear-resistant and high-temperature-resistant plastic products, so that low-friction guidance can be provided for the electric hoisting wire 21, ensuring that the electric hoisting wire 21 does not deviate during lifting, and the electric hoisting wire 21 can pass through the wire bundling block 201, so that the stability of the electric hoisting wire 21 can be ensured when the electric hoisting wire 21 is retracted.

[0049] Specifically, the mounting plate 31 is fixedly connected inside the lamp holder 1, the expelling pipe 34 is arranged in an annular shape, and a plurality of air holes are formed in the outside of the expelling pipe 34.

[0050] Through the above technical scheme, the expelling pipe 34 is arranged in an annular pipe shape, and the air holes are formed along the circumference of the joint of the lamp holder 1, so that the insect-repelling gas can form a ring-shaped directional gas, thereby better preventing insects.

[0051] Specifically, the supporting pipe 32 is provided with multiple, and the positions of the multiple supporting pipes 32 are matched with the positions of the multiple grooves.

[0052] Through the above technical scheme, the thin-walled nickel-plated copper supporting pipe 32 is arranged in an annular array through the mounting plate 31, and each supporting pipe 32 corresponds to a groove on the supporting frame 33, so that more insect-repelling pieces can be installed.

[0053] Specific, the connecting block 41 is fixedly connected at 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 arranged as L-shaped, and the two ends of the pushing block 44 are both arranged as arc-shaped

[0054] Through the above technical scheme, the two ends of the pushing block 44 are both arranged as arc-shaped, when the bottom plate 25 rotates to enter, the pushing block 44 lifts the clamping block 43, until the clamping block 43 falls into the position between the pushing block 44 and the connecting block 41, and when disassembling, the bottom plate 25 is reversely rotated, the other side of the pushing block 44 is arranged as arc-shaped, and the clamping block 43 is lifted, so that the effect of quick disassembly is achieved.

[0055] Working principle: the lamp holder 1 is integrated with LED or other light emitting elements, the top is connected with the adjusting mechanism 2, the electric hanging wire 21 adopts a composite structure of galvanized steel core and insulating layer, the lower end is connected with the lamp holder 1, the upper end is wound on the winding rotating disc 24, and then is connected with the power supply, the lamp holder 1 is provided with support, at the same time, power supply is carried out, the fixed column 22 internally supports the nylon pulley 23 connected by rotation, and the electric hanging wire 21 is provided with low-friction guidance, so as to ensure that the electric hanging wire 21 does not deviate in the lifting process, the winding rotating disc 24 is made of light aluminum alloy, the center shaft is connected with the bottom plate 25 through a needle bearing, a high-carbon stainless steel spiral spring is preinstalled in the center shaft, the bottom plate 25 improves the support of the winding rotating disc 24 and the control unit 28, then the bottom plate 25 is connected with the protective shell 27, the winding rotating disc 24 and the control unit 28 are protected through the protective shell 27, then the protective shell 27 and the fixed column 22 are connected with the ceiling through screws and the like, when it is necessary to adjust the height of the lamp holder 1 downward, the lamp holder 1 is pulled by hand, a downward force is given to the lamp holder 1, the electric hanging wire 21 is pulled down, and the lamp holder 1 is lowered to the target height, then the pulling of the lamp holder 1 is stopped, at this time, the tension of the spiral spring and the weight of the lamp holder 1 are rebalanced, force balance is realized, and the height of the lamp holder 1 remains unchanged, when it is necessary to adjust the height of the lamp holder 1 upward, the lamp holder 1 is held upward by hand, at this time, the weight of the lamp holder 1 and the corresponding spiral spring are out of balance, the electrified electric hanging wire 21 is tightened upward, and the lamp holder 1 is lifted, when the height is adjusted to the appropriate height, the holding of the lamp holder 1 is stopped, the weight of the lamp holder 1 and the corresponding spiral spring are matched, force balance is realized, and the height of the lamp holder 1 remains unchanged, the operation of adjusting the lamp holder 1 is completed, it is not necessary to drive by electricity or frequently pull or rotate the manual telescopic rod to adjust the height, the user can easily and quickly adjust the height of the lighting lamp according to actual needs, and the stability and smooth operation of the lamp at different heights are ensured.

[0056] The above merely describes preferred embodiments of the present application, but is not intended to limit the present application to other forms, any person skilled in the art can make changes or modifications to the above disclosed technical contents into equivalent embodiments with equivalent changes, and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solution content of the present application still belongs to the protection scope of the present application technical solution.

Claims

1. A height-adjustable lighting fixture, comprising a lamp holder (1), characterized in that: The lamp head (1) is provided with an adjustment mechanism (2) at the top, and an insect repellent mechanism (3) is provided inside the lamp head (1). The adjustment mechanism (2) is provided with a disassembly and assembly mechanism (4) at one end. The adjustment mechanism (2) includes an electric suspension wire (21), a fixed column (22) is provided on the outside of 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 winding rotating disk (24), a base plate (25) is fixedly connected to the bottom of the winding rotating disk (24), a protective shell (27) is provided on the top of the base plate (25), and a control unit (28) is installed on the top of the base plate (25). The insect repellent mechanism (3) includes a mounting plate (31), a support tube (32) is fixedly connected to the top of the mounting plate (31), a support frame (33) is fixedly connected to the top of the support tube (32), a plurality of grooves are provided on the top of the support frame (33), solid insect repellent sheets are installed inside the grooves, a repellent tube (34) is fixedly connected to the top of the support frame (33), a through hole is provided at the bottom of the groove, and a heat insulation sheet (35) is installed inside the through hole. The disassembly and assembly mechanism (4) includes a connecting groove and a connecting block (41). A fixing hole is provided on the inner side of the connecting groove. A reset spring (42) is fixedly connected to the inner side of the fixing hole. A locking block (43) is fixedly connected to the bottom of the reset spring (42). A pushing block (44) is fixedly connected to the top of the connecting block (41).

2. The height-adjustable lighting fixture according to claim 1, characterized in that: One end of the electric suspension wire (21) is electrically connected to one end of the lamp holder (1), and a miniature fuse is provided on the electric suspension wire (21).

3. The height-adjustable lighting fixture according to claim 1, characterized in that: Multiple fixed posts (22) and winding discs (24) are provided. The multiple fixed posts (22) and winding discs (24) are arranged in a ring array. The top of the fixed posts (22) and the protective shell (27) are provided with mounting holes. A spiral spring is installed inside the winding disc (24).

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

5. A height-adjustable lighting fixture according to claim 1, characterized in that: One end of the electric hoisting wire (21) is frictionally connected to one end of the pulley (23), and a wire harness block (201) is fixedly connected to the outside of the protective shell (27).

6. A height-adjustable lighting fixture according to claim 1, characterized in that: The mounting plate (31) is fixedly connected to the inside of the lamp head (1), the expulsion tube (34) is set as a ring, and multiple ventilation holes are opened on the outside of the expulsion tube (34).

7. A height-adjustable lighting fixture according to claim 1, characterized in that: Multiple support tubes (32) are provided, and the positions of the multiple support tubes (32) are adapted to the positions of multiple grooves.

8. A height-adjustable lighting fixture according to claim 1, characterized in that: The connecting block (41) is fixedly connected to the top of the base plate (25), the connecting groove is opened at the bottom of the protective shell (27), and both ends of the pushing block (44) are set to be arc-shaped.

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