External anti-dazzle grille for projection lamp

By designing the external anti-glare grille for the cast light with the U-shaped frame and multi-function crossbar, the problems of inconvenient installation and single functions of the external anti-glare grille are solved, and flexible anti-glare adjustment and automatic cleaning of the cast light are realized, improving the lighting effect and convenience of the lamp body.

CN120557593APending Publication Date: 2025-08-29姚进
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Patent Information

Application Number
CN202511043016.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-28
Publication Date
2025-08-29

AI Technical Summary

Technical Problem

The existing external anti-glare grille is inconvenient for adaptive adjustment after installation on the projector lamp, and has a single function, which affects the brightness of the lamp body and is difficult to meet personalized needs.

Method used

An external anti-glare grille for floodlights is designed, including a U-shaped frame, a multi-function crossbar and a grille plate. The grille plate is expanded and folded through the control components, and cleaned with the maintenance components to improve the convenience and diversity of use.

Benefits of technology

The anti-glare effect of the projection lamp is flexible to adjust, the lighting effect of the lamp body is improved, and the quality of the projection is maintained through the automatic cleaning function.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the field of projection lamps, in particular to an external anti-dazzle grille for a projection lamp, which comprises a projection lamp main body, a grille assembly, a control assembly and a maintenance assembly, the projection lamp main body is sleeved with a fixed lantern ring through a bolt, the fixed lantern ring is provided with a U-shaped frame above the projection lamp main body, and the U-shaped frame is provided with an anti-dazzle grille. According to the multifunctional projection lamp, the U-shaped frame is installed outside the projection lamp bodies through the fixing lantern rings, the convenience of maintenance and use is improved, then the multifunctional cross rod and the multiple grating plates are horizontally and movably arranged in the U-shaped frame through the folding and unfolding guide rods, and according to the personalized use requirements of the projection lamp bodies, the multifunctional projection lamp is more convenient to use. According to the anti-dazzle grille, the grille plates can be unfolded and folded in cooperation with the control assembly, the use diversity of the anti-dazzle grille is improved, then under the auxiliary cooperation effect of the maintenance assembly, pollutants on the surface of the projection lamp body can be treated, the projection quality of the projection lamp body is improved, and operation is free of worry and convenient.
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Description

Technical Field

[0001] The present invention relates to the field of floodlights, in particular to an external anti-glare grille for a floodlight. Background Art

[0002] Floodlights are lamps with a higher illuminance on a designated illuminated surface than the surrounding environment. They are also called spotlights or floodlights. With their high brightness and precise light control, floodlights play an important role in many scenarios. In the field of architecture, they can illuminate the exterior walls of single buildings and historical building complexes, showcasing the architectural beauty by letting light from the inside out. In landscape design, they can illuminate trees, flower beds, sculptures, etc., adding nighttime charm to natural and cultural landscapes. In commercial venues, they provide focused lighting for store signs and billboards to attract customers. In sports stadiums, their strong light can meet the lighting needs of night events. In industrial sites, they can provide stable lighting for large-scale work areas such as mines and factories. The core function of using anti-glare grilles on floodlights is to control the light diffusion angle and reduce glare interference. The current mainstream anti-glare grilles are mainly divided into built-in and external types. The built-in type mainly processes light by sinking the lamp body and setting a grille structure between the translucent lens and the lamp body. The external type mostly uses a shield with a multi-grid structure on the outside of the floodlight or a baffle on the side to perform anti-glare treatment. Since the anti-glare grille will affect a certain brightness effect of the lamp body during anti-glare treatment, the existing external anti-glare grille is not conducive to adaptive adjustment after installation, and has a single function, which is inconvenient to use in places with high personalized needs. Summary of the Invention

[0003] The object of the present invention is to provide an external anti-glare grille for a floodlight to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: an external anti-glare grille for a floodlight, comprising: The main body of the floodlight is provided with a fixing collar by means of a bolt sleeve. The fixing collar is located above the main body of the floodlight and has side baffles 31 inclined on three sides of a U-shaped frame. A grille assembly, wherein the grille assembly is arranged in the U-shaped frame through a control assembly, the grille assembly includes a multifunctional crossbar and a plurality of grille plates, and the control assembly includes a control rope and two anti-slip control guide wheels, and the control rope is connected to the multifunctional crossbar; The maintenance component includes a cleaning bar and a liquid storage box. The cleaning bar is arranged at the lower end of the multifunctional cross bar, and the liquid storage box is arranged above the middle section of the U-shaped frame.

[0005] Preferably, control guide grooves are respectively opened on both sides of the U-shaped frame, and a retraction and extension guide rod is horizontally provided on one side of the control guide groove. The two sides of the multifunctional cross bar and several grid plates are respectively inserted into the two control guide grooves and movably sleeved to receive the retraction and extension guide rods. The several grid plates are respectively located between the multifunctional cross bar and the middle section of the U-shaped frame.

[0006] Preferably, the grid plates are provided with a plurality of bending areas, and the multifunctional crossbars are provided with adapting grooves on one side of the bending areas close to the grid plates, and both sides of the bending areas and the adapting grooves are inclined.

[0007] Preferably, the grid plate is provided with vertically assembled pieces on both sides of the bending area and in the adapting groove, the lower ends of the assembled pieces are penetrated with assembled grooves, and one side of the assembled grooves is penetrated with strip grooves.

[0008] Preferably, a flexible grille belt is provided through the strip groove between several assemblies of two adjacent grille plates and between several assemblies of the grille plate and the multifunctional cross bar. Both sides of the flexible grille belt are respectively inserted into the combination grooves of the two assemblies and are provided with combination pieces. Elastic blocks are respectively provided at the lower ends of both sides of the combination groove, and the two elastic blocks are respectively clamped with the lower ends of the combination pieces.

[0009] Preferably, the U-shaped frame is provided with a concave receiving groove on the side away from the multifunctional cross bar, and a reference belt is provided on one side of the receiving groove close to the bending area of ​​the grille plate, and a flexible grille belt is provided on one side of the reference belt, and the flexible grille belt of the reference belt is inserted into the assembly of the grille plate.

[0010] Preferably, a rotation shaft and a motor drive shaft are horizontally provided on both sides of the control guide groove, two anti-slip control guide wheels are respectively sleeved on the rotation shaft and the motor drive shaft, the control rope is overlapped with the two anti-slip control guide wheels, and the two ends of the control rope are respectively connected to the two sides of the multi-functional cross bar located in the control guide groove.

[0011] Preferably, the cleaning strip is arranged at the lower end of the multifunctional cross bar, the lower end of the cleaning strip is flush with the upper end surface of the floodlight body, and there is a water flow gap between the grille plate and the upper end surface of the floodlight body. When several grille plates are unfolded, the multifunctional cross bar is misaligned with the upper end of the floodlight body.

[0012] Preferably, a plurality of horizontal slide grooves are provided at the upper end of the multifunctional cross bar, and a push protection block is provided in each of the horizontal slide grooves for horizontal sliding. A spring rod is provided horizontally on one side of each of the push protection blocks. The spring rod is movable through the horizontal slide groove. A first spring is provided on one side of the spring rod located in the horizontal slide groove, and a drip groove is provided on the side of the horizontal slide groove that passes through the multifunctional cross bar close to the cleaning bar.

[0013] Preferably, a give way groove is horizontally opened on one side of the lower end of the liquid storage box near the multifunctional cross bar, and a plurality of piston grooves are horizontally opened on one side of the liquid storage box located at the give way groove, and the plurality of piston grooves are arranged corresponding to the plurality of push protection blocks, and a blocking piston is horizontally movably inserted in the plurality of piston grooves, and a prismatic top rod is horizontally movably inserted on the side of the blocking piston close to the give way groove, and a second spring is provided on the side of the blocking piston located in the piston groove, a first docking hole is vertically penetrated through the piston groove in the liquid storage box, and a second docking hole is vertically penetrated through the side of the blocking piston away from the second spring and the first docking hole, the second docking hole is arranged to correspond to the diameter of the first docking hole, and when the multifunctional cross bar is below the liquid storage box and the push protection block is inserted into the give way groove, the second docking hole, the first docking hole and the drip groove in the horizontal slide groove correspond to each other.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This device installs the U-shaped frame on the outside of the floodlight body through a fixed ring, which improves the convenience of maintenance and use. Then, a multifunctional cross bar and a plurality of grille plates are arranged in the U-shaped frame through the horizontal movement of the retractable and extendable guide rods. According to the personalized use requirements of the floodlight body, the control component can be used to realize the expansion and folding of the plurality of grille plates, thereby improving the diversity of the use of the anti-glare grille. Then, with the auxiliary cooperation of the maintenance component, the pollutants on the surface of the floodlight body can be treated, thereby improving the projection quality of the floodlight body and making the operation worry-free and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of part A; Figure 3 It is a schematic diagram of a partial side sectional structure of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of part B; Figure 5 For the present invention Figure 3 Schematic diagram of the C part; Figure 6 For the present invention Figure 5 Schematic diagram of the D part; Figure 7 This is a schematic diagram of the U-shaped frame structure of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of part E; Figure 9 It is a side cross-sectional diagram of the connection structure in the control guide groove of the present invention; Figure 10 For the present invention Figure 9 Schematic diagram of the F part; Figure 11 This is a schematic diagram of the connection structure between the grid plate and the multifunctional crossbar of the present invention; Figure 12 For the present invention Figure 11 Schematic diagram of G part; Figure 13 For the present invention Figure 12 Schematic diagram of the H part.

[0016] In the figure: the floodlight body 1, the fixing ring 2, the U-shaped frame 3, the control guide groove 4, the retractable guide rod 5, the multifunctional cross bar 6, the grille plate 7, the bending area 8, the assembly 9, the combination groove 10, the flexible grille belt 11, the combination sheet 12, the elastic block 13, the anti-skid control guide wheel 14, the control rope 15, the cleaning strip 16, the horizontal slide 17, the push protection block 18, the spring rod 19, the first spring 20, the drip groove 21, the liquid storage box 22, the give way groove 23, the piston groove 24, the blocking piston 25, the first docking hole 26, the second docking hole 27, the second spring 28, the prismatic top rod 29, the reference belt 30, and the side baffle 31. DETAILED DESCRIPTION

[0017] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figures 1-13 , the present invention provides the following technical solutions: Embodiment 1: An external anti-glare grille for a floodlight comprises a floodlight body 1, on which a fixing collar 2 is provided via a bolt sleeve. The fixing collar 2 is located above the floodlight body 1 and is provided with a U-shaped frame 3. Side baffles 31 are provided obliquely on three sides of the U-shaped frame 3. The fixing collar 2 can fix the U-shaped frame 3 with the side baffles 31 above the floodlight body 1. The side baffles 31 can block the surrounding glare of the floodlight body 1 without affecting the brightness, thereby preventing it from affecting the surroundings.

[0019] A grille assembly is provided to perform anti-glare treatment on the light generated by the floodlight main body 1. The grille assembly is arranged in the U-shaped frame 3 through the control assembly. The grille assembly includes a multifunctional cross bar 6 and a plurality of grille plates 7. The control assembly includes a control rope 15 and two anti-slip control guide wheels 14. The control rope 15 is connected to the multifunctional cross bar 6. Control guide grooves 4 are respectively provided on both sides of the U-shaped frame 3. One side of the control guide grooves 4 is horizontally provided with a retraction and expansion guide rod 5. Both sides of the multifunctional cross bar 6 and the plurality of grille plates 7 are respectively inserted into the two control guide grooves 4 and movably sleeved to receive the expansion guide rod 5. The plurality of grille plates 7 are respectively located between the multifunctional cross bar 6 and the middle section of the U-shaped frame 3. When the multifunctional cross bar 6 is away from the middle section of the U-shaped frame 3, the plurality of grille plates 7 are evenly distributed above the floodlight main body 1 to form a grille structure.

[0020] The grille plate 7 is provided with a number of bending areas 8, and the multifunctional cross bar 6 is provided with an adaptable groove on one side of the bending area 8 near the grille plate 7, and both sides of the bending area 8 and the adaptable groove are inclined. The grille plate 7 is located on both sides of the bending area 8 and the adaptable groove. There are vertical assemblies 9 provided in the adaptable groove. The lower end of the assembly 9 is penetrated by a combination groove 10, and one side of the combination groove 10 is penetrated by a strip groove. A flexible grille belt 11 is provided between the several assemblies 9 of the two adjacent grille plates 7 and between the several assemblies 9 of the grille plate 7 and the multifunctional cross bar 6. The two sides of the flexible grille belt 11 are respectively plugged into the combination grooves 10 of the two assemblies 9. A combination piece 12 is provided inside, and elastic blocks 13 are respectively provided at the lower ends of both sides of the combination groove 10, and the two elastic blocks 13 are respectively clamped with the lower ends of the combination piece 12. When the multifunctional cross bar 6 is away from the middle section of the U-shaped frame 3, the multifunctional cross bar 6 drives the adjacent grid plates 7 to move together through the flexible grid belt 11. When the flexible grid belt 11 is tightened, the flexible grid belt 11 pulls the next grid plate 7 to move along the retractable guide rod 5. In this way, when the multifunctional cross bar 6 walks to the farthest end in the control guide groove 4, several grid plates 7 and several flexible grid belts 11 form a grid of a vertical and horizontal connection structure, which performs grid anti-glare on the light produced by the floodlight main body 1.

[0021] The U-shaped frame 3 is provided with a concave storage groove on one side away from the multifunctional cross bar 6, and a reference belt 30 is provided on one side of the bending area 8 near the grille plate 7 in the storage groove. A flexible grille belt 11 is provided on one side of the reference belt 30, and the flexible grille belt 11 of the reference belt 30 is plugged into the assembly 9 of the grille plate 7. A rotation shaft and a motor drive shaft are horizontally provided on both sides of the control guide groove 4. Two anti-skid control guide wheels 14 are respectively sleeved on the rotation shaft and the motor drive shaft. The control rope 15 overlaps the two anti-skid control guide wheels 14, and the two ends of the control rope 15 are respectively connected to the two sides of the multifunctional cross bar 6 located in the control guide groove 4. When the grille plate 7 is connected to the U-shaped frame 3, the combination piece 12 of the reference belt 30 can be quickly connected. Similarly, when several grille plates 7 are combined, they are also quickly connected through the combination piece 12 of the flexible grille belt 11, which is convenient for later maintenance and replacement. The setting of the elastic block 13 can constrain the position of the combination piece 12 in the assembly 9; When the floodlight body 1 does not need to use the grille plate 7 according to the floodlight requirements, the multifunctional cross bar 6 can control the rotation of the anti-slip control guide wheel 14 on one side through a small servo motor, and then drive the connected control rope 15 to control the multifunctional cross bar 6 to move in the control guide groove 4, so that the multifunctional cross bar 6 squeezes the grille plate 7 to fold and store it to the middle section of the U-shaped frame 3. When the grille plate 7 is folded, the bending area 8 and the width of the adaptive groove will not be affected by the presence of the flexible grille belt 11 to affect the folding.

[0022] Embodiment 2: On the basis of embodiment 1, a maintenance component is set to automatically clean the surface of the floodlight body 1 regularly. The maintenance component includes a cleaning strip 16 and a liquid storage box 22. The cleaning strip 16 is provided at the lower end of the multifunctional cross bar 6, and the liquid storage box 22 is provided above the middle section of the U-shaped frame 3. The cleaning strip 16 is provided at the lower end of the multifunctional cross bar 6. The lower end of the cleaning strip 16 is flush with the upper end surface of the floodlight body 1. There is a water flow gap between the grille plate 7 and the upper end surface of the floodlight body 1. When several grille plates 7 are unfolded, the multifunctional cross bar 6 is misaligned with the upper end of the floodlight body 1. When several grille plates 7 are unfolded, rainwater on the surface of the floodlight body 1 can fall naturally without contacting the grille plate 7 and the multifunctional cross bar 6, and does not affect the normal drainage of the surface of the floodlight body 1. The upper end of the multifunctional crossbar 6 is provided with a plurality of horizontal chutes 17, and a plurality of horizontal chutes 17 are provided with push protection blocks 18 for horizontal sliding. A plurality of push protection blocks 18 are provided with spring rods 19 on one side thereof. The spring rods 19 are movable through the horizontal chute 17. The spring rods 19 are provided with a first spring 20 on one side thereof located in the horizontal chute 17. A drip groove 21 is provided on the side of the multifunctional crossbar 6 near the cleaning strip 16 in the horizontal chute 17. A clearance groove 23 is provided on the lower end of the liquid storage box 22 near the side of the multifunctional crossbar 6. A plurality of piston grooves 24 are horizontally opened on one side of the give way groove 23. The plurality of piston grooves 24 are arranged in correspondence with the plurality of push protection blocks 18. A blocking piston 25 is horizontally movably inserted in the plurality of piston grooves 24. A prismatic push rod 29 is horizontally movably inserted in the blocking piston 25 on the side close to the give way groove 23. A second spring 28 is provided on the side of the blocking piston 25 located in the piston groove 24. A first docking hole 26 is vertically penetrated through the piston groove 24 in the liquid storage box 22. A vertically penetrated side of the blocking piston 25 away from the second spring 28 and the first docking hole 26 is opened. There is a second docking hole 27, and the diameter of the second docking hole 27 corresponds to that of the first docking hole 26. When the multifunctional cross bar 6 is under the liquid storage box 22 and the protective block 18 is pushed to be inserted into the make way groove 23, the second docking hole 27, the first docking hole 26 and the drip groove 21 in the horizontal slide 17 correspond to each other. When the multifunctional cross bar 6 folds the grid plate 7 and stores it to the middle section of the U-shaped frame 3, as the multifunctional cross bar 6 is inserted under the liquid storage box 22, the protective block 18 is pushed to be unable to move further in the make way groove 23. At this time, the protective block 18 is pushed to be inserted into the drip groove 23. 21 is first dislocated, and then the protective block 18 is pushed to push the prismatic push rod 29 and the blocking piston 25 to move. At this time, the first docking hole 26, the second docking hole 27 and the dripping groove 21 are docked, and the cleaning solution in the liquid storage box 22 drips into the dripping groove 21 to soak the cleaning strip 16 below. Then the multi-functional cross bar 6 is controlled to reciprocate above the floodlight body 1 to clean the stubborn dust and dirt avoided by the floodlight body 1. When there is only floating dust on the surface of the floodlight body 1, the multi-functional cross bar 6 can be used directly to move and wipe the surface of the floodlight body 1 after rain.

[0023] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An external anti-glare grille for a floodlight, characterized in that: include: A floodlight body (1), wherein a fixing collar (2) is provided on the floodlight body (1) via a bolt sleeve, the fixing collar (2) being located above the floodlight body (1) and provided with a U-shaped frame (3), and side baffles (31) are provided on three sides of the U-shaped frame (3) at an angle; A grille assembly, wherein the grille assembly is arranged in a U-shaped frame (3) through a control assembly, the grille assembly includes a multifunctional crossbar (6) and a plurality of grille plates (7), the control assembly includes a control rope (15) and two anti-slip control guide wheels (14), and the control rope (15) is connected to the multifunctional crossbar (6); A maintenance component, comprising a cleaning bar (16) and a liquid storage box (22), wherein the cleaning bar (16) is arranged at the lower end of the multifunctional cross bar (6), and the liquid storage box (22) is arranged above the middle section of the U-shaped frame (3).

2. The external anti-glare grille for a floodlight according to claim 1, characterized in that: Control guide grooves (4) are respectively provided on both sides of the U-shaped frame (3), and a retractable guide rod (5) is horizontally provided on one side of the control guide groove (4). Both sides of the multifunctional cross bar (6) and a plurality of grid plates (7) are respectively inserted into the two control guide grooves (4) and movably sleeved to receive the retractable guide rod (5). The plurality of grid plates (7) are respectively located between the multifunctional cross bar (6) and the middle section of the U-shaped frame (3).

3. The external anti-glare grille for a floodlight according to claim 2, characterized in that: The grid plate (7) is provided with a plurality of bending areas (8), and the multifunctional cross bar (6) is provided with an adapting groove on one side of the bending area (8) close to the grid plate (7), and both sides of the bending area (8) and the adapting groove are inclined.

4. The external anti-glare grille for a floodlight according to claim 3, characterized in that: The grid plate (7) is provided with assembly members (9) vertically on both sides of the bending area (8) and in the adapting groove. The lower end of the assembly member (9) is provided with a combination groove (10) extending through it, and one side of the combination groove (10) is provided with a strip groove extending through it.

5. The external anti-glare grille for a floodlight according to claim 4, characterized in that: A flexible grid belt (11) is provided through the strip groove between the plurality of assemblies (9) of two adjacent grid plates (7) and between the grid plates (7) and the plurality of assemblies (9) of the multifunctional crossbar (6). Both sides of the flexible grid belt (11) are respectively inserted into the combination grooves (10) of the two assemblies (9) and provided with combination pieces (12). Elastic clamping blocks (13) are respectively provided at the lower ends of both sides of the combination groove (10), and the two elastic clamping blocks (13) are respectively clamped with the lower ends of the combination pieces (12).

6. The external anti-glare grille for a floodlight according to claim 5, characterized in that: The U-shaped frame (3) is provided with a concave receiving groove on one side away from the multifunctional crossbar (6), and a reference belt (30) is provided on one side of the receiving groove close to the bending area (8) of the grid plate (7). A flexible grid belt (11) is provided on one side of the reference belt (30), and the flexible grid belt (11) of the reference belt (30) is plugged into the assembly (9) of the grid plate (7).

7. The external anti-glare grille for a floodlight according to claim 6, characterized in that: A rotation shaft and a motor drive shaft are respectively provided horizontally on both sides of the control guide groove (4); two anti-skid control guide wheels (14) are respectively sleeved on the rotation shaft and the motor drive shaft; a control rope (15) is connected to the two anti-skid control guide wheels (14); and both ends of the control rope (15) are respectively connected to both sides of the multifunctional cross bar (6) located in the control guide groove (4).

8. The external anti-glare grille for a floodlight according to claim 7, characterized in that: The cleaning strip (16) is provided at the lower end of the multifunctional cross bar (6), the lower end of the cleaning strip (16) is flush with the upper end surface of the floodlight body (1), a water flow gap exists between the grille plate (7) and the upper end surface of the floodlight body (1), and when a plurality of grille plates (7) are unfolded, the multifunctional cross bar (6) and the upper end of the floodlight body (1) are misaligned.

9. The external anti-glare grille for a floodlight according to claim 8, characterized in that: The upper end of the multifunctional cross bar (6) is provided with a plurality of horizontal chutes (17), and a push protection block (18) is provided in each of the plurality of horizontal chutes (17) for horizontal sliding movement. A spring rod (19) is provided horizontally on one side of each of the plurality of push protection blocks (18). The spring rod (19) is movable and passes through the horizontal chutes (17). A first spring (20) is provided on one side of the spring rod (19) located in the horizontal chutes (17). A drip groove (21) is provided on one side of the horizontal chutes (17) that passes through the multifunctional cross bar (6) and is close to the cleaning bar (16).

10. The external anti-glare grille for a floodlight according to claim 9, characterized in that: The lower end of the liquid storage box (22) is provided with a horizontal opening for a clearance groove (23) on one side near the multifunctional cross bar (6), and a plurality of piston grooves (24) are provided horizontally on one side of the liquid storage box (22) located at the clearance groove (23). The plurality of piston grooves (24) are arranged in correspondence with the plurality of push protection blocks (18), and a blocking piston (25) is provided in each of the plurality of piston grooves (24) for horizontal movement. A prismatic top rod (29) is provided in the blocking piston (25) for horizontal movement on one side near the clearance groove (23), and a second spring (29) is provided on one side of the blocking piston (25) located in the piston groove (24). 8), a first docking hole (26) is provided in the liquid storage box (22) through the piston groove (24), and a second docking hole (27) is provided in the blocking piston (25) through the side away from the second spring (28) and the first docking hole (26). The second docking hole (27) is set to correspond to the diameter of the first docking hole (26), and when the multifunctional cross bar (6) is located below the liquid storage box (22) and pushes the protective block (18) to be inserted into the clearance groove (23), the second docking hole (27), the first docking hole (26) and the drip groove (21) in the horizontal slide groove (17) correspond to each other.