CN220674897U - Insecticidal device - Google Patents

Abstract

The utility model belongs to the technical field of insecticidal devices for rice planting, and particularly relates to an insecticidal device. The technology comprises a supporting plate, wherein a trap lamp is arranged at the bottom of the supporting plate, an electric shock net is sleeved outside the trap lamp, and a rain shield is fixed at the top of the supporting plate through a supporting rod; the outer side of the electric shock net is sleeved with a first supporting ring, the inner side wall of the first supporting ring is provided with a first hairbrush, the inner side of the electric shock net is provided with a second supporting ring, and the outer side wall of the second supporting ring is provided with a second hairbrush; the right side of the side wall of the electric shock net is provided with a through groove, and a connecting rod is arranged in the through groove; one end of the connecting rod is connected to the second support ring, and the other end of the connecting rod is connected to the first support ring; the bottom of the electric shock net is fixed with a first funnel; a second funnel is arranged below the first funnel, a connecting ring is sleeved at a funnel opening of the second funnel, and the connecting ring is fixed on the rain shield through a fixing block; a supporting component is arranged below the connecting ring. The utility model solves the problem that pests cannot be brushed off comprehensively.

Description

Insecticidal device

Technical Field

The utility model belongs to the technical field of insecticidal devices for rice planting, and particularly relates to an insecticidal device.

Background

In the process of planting rice, many pests are generated, so that the pests and diseases need to be prevented and controlled, and the rice can stably grow; therefore, rice planters can kill pests by using the pest killing device;

the existing pest killing device has the design that an electric shock net and a pest trapping lamp are arranged, pests are attracted through the pest trapping lamp, the electric shock net is sleeved on the outer side of the rear pest trapping lamp, and the electric shock net is used for electrically shocking the pests, so that the purpose of electrocuting the pests is achieved; however, after the electric shock net is used for a long time, a plurality of pests are adhered to the electric shock net, and the subsequent use is influenced, so the design is also provided with a cleaning brush, the cleaning brush is positioned at the outer side of the electric shock net, and the cleaning brush brushes the pests adhered to the outer side of the electric shock net in a rotating manner; the rear pests are brushed off;

however, in the prior art, firstly, because the cleaning brush is positioned at the outer side of the electric shock net to brush, but a part of pests can also drill to the inner side of the electric shock net, the cleaning brush can not brush off the pests at the inner side of the electric shock net; secondly, in the process that the cleaning brush brushes outside the electric shock net, pests attached to the outer side of the electric shock net possibly brush the inner side of the electric shock net, but the cleaning brush cannot brush the pests attached to the inner side of the electric shock net; therefore, during the process, pests cannot be comprehensively brushed off the electric shock net.

Disclosure of Invention

According to the defects in the prior art, the technical problems to be solved by the utility model are as follows: the pest killing device is provided, and pests are brushed off the electric shock net as comprehensively as possible.

The insect killing device comprises a horizontally arranged supporting plate, wherein a trap lamp is arranged at the bottom of the supporting plate, an electric shock net fixed at the bottom of the supporting plate is sleeved outside the trap lamp, the electric shock net is of a cylindrical structure which is communicated with each other up and down, and a rain baffle plate is fixed at the top of the supporting plate through a supporting rod; the outer side of the electric shock net is horizontally sleeved with a first supporting ring, the inner side wall of the first supporting ring is provided with a first brush for brushing off pests on the outer side wall of the electric shock net, the inner side of the electric shock net is horizontally provided with a second supporting ring, and the outer side wall of the second supporting ring is provided with a second brush for brushing off pests on the inner side wall of the electric shock net; the right side of the side wall of the electric shock net is provided with a through groove which is communicated up and down, and a connecting rod which can slide up and down in the through groove is horizontally arranged in the through groove; one end of the connecting rod is connected to the second support ring, and the other end of the connecting rod is connected to the first support ring; the bottom of the electric shock net is fixed with a first funnel for discharging pests brushed by the second brush; a second funnel used for discharging pests brushed by the first hairbrush is arranged below the first funnel, a connecting ring is horizontally sleeved at the edge of a funnel opening of the second funnel, and the connecting ring is fixed on the rain shield through a fixing block; a supporting component for supporting the connecting ring upwards is arranged below the connecting ring.

Further, the supporting component comprises a bottom plate which is horizontally arranged, a fixing rod is vertically fixed at the top of the bottom plate, the fixing rod is fixed at the bottom of the connecting ring through a plurality of connecting rods, a plurality of first through holes which are vertically communicated are formed in the bottom plate, and anchor nails used for being driven into the ground are respectively arranged in the first through holes in a penetrating mode.

Further, the discharge ports of the first funnel and the second funnel are connected and communicated; the discharge gate department of second funnel has the collection frame through threaded connection.

Further, a solar panel is arranged on the rain shield, and a battery is fixed at the top of the support plate; the battery is electrically connected with the solar panel, and the electric shock net and the trap lamp are respectively electrically connected with the battery.

Further, the left side and the right side of the first support ring are both horizontally provided with sliding blocks fixed on the outer side wall of the first support ring, the sliding blocks are provided with second through holes which are communicated up and down, sliding rods are independently arranged in the second through holes in a penetrating mode, one ends of the sliding rods are both fixed at the bottom of the support plate, and the other ends of the sliding rods are both fixed on the connecting ring; the outer side of the sliding rod is independently sleeved with a spring; one end of the spring is fixed on the sliding block, and the other end of the spring is fixed on the connecting ring; the sliding block is clung to the bottom of the supporting plate in the natural state of the spring.

Furthermore, the sliding blocks are provided with handles which can conveniently pull the sliding blocks to slide up and down.

Furthermore, the outside of trap lamp is overlapped and is had the safety cover to its protection, and the safety cover is located the electric shock net inboard.

Further, the bottom of electric shock net articulates through articulated seat has the rotatory piece that is used for sheltering from logical groove department, and rotatory piece is back and forth swing.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the first supporting ring is arranged on the outer side of the electric shock net, the first hairbrush is arranged on the inner side of the first supporting ring, and the first hairbrush can brush away pests on the outer side wall of the electric shock net; the inner side of the electric shock net is provided with a second supporting ring, the outer side of the second supporting ring is provided with a second brush, and the second brush can brush away pests on the inner side wall of the electric shock net; the first support ring and the second support ring are connected together through the connecting rod, so that the first support ring and the second support ring can be operated to slide up and down simultaneously, and pests attached to the inner side wall and the outer side wall of the electric shock net can be brushed down simultaneously, and the problem that pests on the inner side of the electric shock net cannot be brushed down in the prior art, so that the pests cannot be brushed off comprehensively is solved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A;

FIG. 3 is a schematic top view of the first support ring and the second support ring of FIG. 1;

FIG. 4 is a schematic top view of the attachment ring and second funnel of FIG. 1;

fig. 5 is a schematic top view of the shock network of fig. 1;

fig. 6 is a right-side view of the shock network of fig. 1;

FIG. 7 is a schematic diagram of the front view of FIG. 1;

the names of the components in the figure are as follows: 1. the solar energy collecting device comprises a connecting ring 2, a protective cover 3, a trap lamp 4, an electric shock net 5, a sliding block 6, a supporting plate 7, a second hairbrush 8, a second supporting ring 9, a battery 10, a solar panel 11, a supporting rod 12, a switch 13, a connecting rod 14, a first hairbrush 15, a first supporting ring 16, a rain shielding plate 17, a handle 18, a sliding rod 19, a spring 20, a rotating block 21, a second funnel 22, a first funnel 23, a collecting frame 24, a fixing rod 25, a bottom plate 26 and anchors.

Description of the embodiments

The present utility model is further illustrated by the following examples, which are not intended to be limiting, but any modifications, equivalents, improvements, etc. within the spirit and principles of the present utility model are intended to be included within the scope of the present utility model.

Examples

The insect killing device of the embodiment comprises a horizontally arranged supporting plate 6, wherein a trap lamp 3 is arranged at the bottom of the supporting plate 6, an electric shock net 4 fixed at the bottom of the supporting plate 6 is sleeved outside the trap lamp 3, the electric shock net 4 is of a cylindrical structure which is communicated with each other up and down, the trap lamp 3 can attract insects, and the electric shock net 4 can shock the insects; when the insect pest killing device is used, insects fly towards the direction of the insect trap lamp 3, so that the insects fly onto the electric shock net 4 at first, and the electric shock net 4 shocks the insects so as to kill the insects;

as shown in fig. 1, the outer side of the trap lamp 3 is sleeved with a protective cover 2 for protecting the trap lamp, and the protective cover 2 is positioned at the inner side of the electric shock net 4; therefore, through the design of the protective cover 2, the insect is prevented from adhering to the trap lamp 3 as much as possible, and the service life of the trap lamp 3 is prolonged as much as possible; meanwhile, the protective cover 2 is made of transparent materials, so that the light source of the trap lamp 3 can be conveniently emitted;

as shown in fig. 1, the top of the supporting plate 6 is fixed with a rain shield 16 through a supporting rod 11; when the supporting rod 11 is specifically installed, one end of the supporting rod 11 is fixed on the top of the supporting plate 6, and the other end of the supporting rod is fixed on the rain shield 16; the rain shield 16 may preferably have a "herringbone" configuration; rainwater can flow downwards in an inclined state on the rain shield 16;

as shown in fig. 1, 2, 3 and 5, the outer side of the electric shock net 4 is horizontally sleeved with a first supporting ring 15, and the inner side wall of the first supporting ring 15 is provided with a first brush 14 for brushing off pests on the outer side wall of the electric shock net 4, so that the brush head of the first brush 14 is contacted with the outer side wall of the electric shock net 4; therefore, when in use, the first supporting ring 15 can slide up and down on the outer side wall of the electric shock net 4, and can drive the first hairbrush 14 to slide up and down; the pest adhered to the outer side wall of the electric shock net 4 can be brushed down by the brush head of the first brush 14 in the process of sliding up and down;

as shown in fig. 1, 2, 3 and 5, the inner side of the electric shock net 4 is horizontally provided with a second supporting ring 8, and the outer side wall of the second supporting ring 8 is provided with a second brush 7 for brushing off pests on the inner side wall of the electric shock net 4; the brush head of the second brush 7 is contacted with the inner side wall of the electric shock net 4; therefore, when in use, the second supporting ring 8 slides up and down on the inner side wall of the electric shock net 4, and can drive the second hairbrush 7 to slide up and down; the brush head of the second brush 7 can brush down the pests adhered on the inner side wall of the electric shock net 4 in the process of sliding up and down;

as shown in fig. 3, 5 and 6, the right side of the side wall of the electric shock net 4 is provided with a through groove which is communicated up and down, and the through groove is horizontally provided with a connecting rod 13 which can slide up and down in the through groove; one end of the connecting rod 13 is connected to the second support ring 8, and the other end is connected to the first support ring 15; the first support ring 15 and the second support ring 8 can be connected together through the design of the connecting rod 13, and the connecting rod 13 can slide up and down in the through groove, so that the connecting rod and the second support ring 8 can be driven to slide up and down together; when the support device is used, the first support ring 15 is operated by hand, and the second support ring 8 is driven to slide up and down by the connecting rod 13 in the process of sliding up and down of the first support ring 15; therefore, the second supporting ring 8 and the first supporting ring 15 do not need to be operated to slide respectively, and the second hairbrush 7 and the first hairbrush 14 can be driven to brush the inner side wall and the outer side wall of the electric shock net 4 simultaneously only by operating the first supporting ring 15 to slide; therefore, the problem that pests on the inner side of the electric shock net 4 cannot be brushed off in the existing insecticidal device is solved, and the pest can be brushed off more comprehensively by the design;

further preferably, a through groove which is communicated up and down is also arranged on the left side of the side wall of the electric shock net 4, and a connecting rod 13 which can slide up and down in the through groove is also horizontally arranged in the through groove; one end of the connecting rod 13 is connected to the second support ring 8, and the other end is connected to the first support ring 15; the two connecting rods 13 are symmetrically designed, so that the first supporting ring 15 can be more stable in the process of driving the second supporting ring 8 to slide up and down;

as shown in fig. 1 and 7, the bottom of the electric shock net 4 is hinged with a rotating block 20 for shielding the through groove through a hinge seat, the rotating block 20 swings back and forth, and when the hinge seat is specifically installed, the hinge seat comprises a plate with a U-shaped structure, and the top of the left side of the plate with the U-shaped structure is fixed at the bottom of the electric shock net 4; one side of the rotating block 20 is positioned between the plates of the U-shaped structure, a rotating shaft is oppositely arranged on one side of the rotating block 20, and the rotating shaft is arranged on the plate of the U-shaped structure through a bearing; when the bearing is specifically installed, the left and right side walls of the U-shaped structural plate are provided with left and right communicated mounting holes, the outer ring of the bearing is fixed in the mounting holes, and the rotating shaft is fixed with the inner ring of the bearing; the rotating block 20 can thus be oscillated back and forth; meanwhile, the rotary block 20 is positioned at the through groove, so that when the rotary block 20 rotates upwards to be in a vertical state, the position of the through groove can be shielded, and pests are prevented from flying into the electric shock net 4 from the through groove; meanwhile, when the rotating block 20 rotates downwards to be in a horizontal state, the rotating block 20 moves away from the through groove, so that the connecting rod 13 can continuously slide up and down in the through groove, and simultaneously, the first hairbrush 14 and the second hairbrush 7 can be continuously driven to brush the side wall of the electric shock net 4;

as shown in fig. 1, a first hopper 22 for discharging pests brushed off by the second brush 7 is fixed to the bottom of the electric shock net 4; when the first funnel 22 is specifically installed, the diameter of the funnel opening of the first funnel 22 is designed according to the diameter of the electric shock net 4, so that the diameter of the funnel opening is consistent with the diameter of the electric shock net 4, and the rear funnel opening is installed at the bottom of the electric shock net 4; since the second brush 7 and the second supporting ring 8 are positioned at the inner side of the electric shock net 4, pests brushed by the second brush 7 can fall into the first hopper 22 and then be discharged from the discharge hole of the first hopper 22;

as shown in fig. 1, a second funnel 21 for discharging pests brushed by the first brush 14 is arranged below the first funnel 22, and a connecting ring 1 is horizontally sleeved at the edge of a funnel opening of the second funnel 21, and the connecting ring 1 is fixed on the rain shield 16 through a fixed block; when the second funnel 21 is specifically installed, the diameter of the funnel mouth of the second funnel 21 is larger than that of the first supporting ring 15, so that pests brushed down on the first brush 14 can fall into the second funnel 21 and then be discharged from the discharge mouth of the second funnel 21; the outer side wall of the orifice of the second funnel 21 is arranged on the inner side of the connecting ring 1; when the fixing blocks are specifically installed, the two fixing blocks are vertically arranged left and right, the top ends of the fixing blocks are fixed on the rain baffle 16, and the bottom ends of the fixing blocks are fixed on the connecting ring 1, so that the connecting ring 1 and the second funnel 21 are supported by the design of the fixing blocks;

as shown in fig. 1, the discharge ports of the first funnel 22 and the second funnel 21 are connected and communicated; the discharge hole of the second funnel 21 is connected with a collecting frame 23 through threads; when the threaded connection is implemented, the collecting frame 23 is of an annular structure, an external thread is arranged on the outer side wall of the collecting frame 23, and an internal thread in threaded fit with the external thread is arranged at the discharge hole of the second funnel 21; the collecting frame 23 can be fixed at the discharge opening of the second hopper 21 by means of a threaded connection; because the discharge ports of the first funnel 22 and the second funnel 21 are connected and communicated, pests in the first funnel 22 can fall into the second funnel 21, and the collecting frame 23 on the second funnel 21 can collect the pests in the second funnel 21 and the first funnel 22 at the same time, and meanwhile, insecticide can be poured into the collecting frame 23, so that the pests falling into the collecting frame 23 can be killed;

as shown in fig. 1 and 7, a support assembly for supporting the connection ring 1 upward is provided below the connection ring; the supporting component comprises a bottom plate 25 which is horizontally arranged, a fixing rod 24 is vertically fixed at the top of the bottom plate 25, the fixing rod 24 is fixed at the bottom of the connecting ring 1 through a plurality of connecting rods, a plurality of first through holes which are vertically communicated are formed in the bottom plate 25, and anchor nails 26 used for being driven into the ground are respectively penetrated in the first through holes; therefore, the connecting ring 1 can be upwards supported by the fixing rod 24, so that the position of the second funnel 21 can be conveniently lifted, and pests in the second funnel 21 can be conveniently discharged subsequently; through the design of the anchor 26, the bottom plate 25 can be fixed on a field ridge when the paddy rice is planted in the field, so the design is also fixed, and the stability in the use process is maintained;

in a specific implementation process, the fixing rod 24 in the supporting component can be replaced by a telescopic rod, the telescopic rod consists of an upper hollow rod and a lower hollow rod, the diameter of the upper hollow rod is smaller than that of the lower hollow rod, a plurality of first jacks which are communicated left and right are formed in the upper hollow rod, a second jack which is communicated left and right is formed in the lower hollow rod, the central lines of the first jack and the second jack are positioned on the same horizontal line, the lower end of the upper hollow rod is inserted into the upper end of the lower hollow rod, then the first jacks and the second jacks are aligned in pairs, and a pull pin for fixing the upper hollow rod and the lower hollow rod is inserted into the aligned jacks;

in the specific use process: firstly, a trap lamp 3 and an electric shock net 4 are opened, pests are shocked by the electric shock net 4 under the attraction of the trap lamp 3, and the shocked pests fall into a second funnel 21 and a first funnel 22 respectively and finally fall into a collecting frame 23, and insecticidal liquid in the collecting frame 23 kills the pests; when a certain amount of pests are attached to the electric shock net 4, the first supporting ring 15 is lifted, the first supporting ring 15 also lifts the second supporting ring 8 through the connecting rod 13, then the first supporting ring 15 moves up and down, the first hairbrushes 14 on the first supporting ring 15 brush away the pests on the outer side wall of the electric shock net 4, and the second hairbrushes 7 on the second supporting ring 8 brush away the pests on the inner side wall of the electric shock net 4; the brushed-off pests also fall into the collection frame 23 following the second hopper 21 and the first hopper 22; therefore, in the process, pests on the inner side wall and the outer side wall of the electric shock net 4 can be brushed off, and the problem that pests cannot be comprehensively brushed off the electric shock net 4 in the prior art is avoided.

Examples

The technology of this embodiment will be further described, as shown in fig. 1 and 7, the solar panel 10 is disposed on the rain shield 16, and the battery 9 is fixed on the top of the support plate 6; the battery 9 is electrically connected with the solar panel 10, and the electric shock net 4 and the trap lamp 3 are respectively electrically connected with the battery 9; the solar panel 10 is connected with the battery 9 through a cable, and the battery 9 is respectively connected with the trap lamp 3 and the electric shock net 4 through the cable; in the connection process, the trap lamp 3 and the electric shock net 4 are also respectively connected with a switch 12 through cables, the switches 12 are positioned at the top of the supporting plate 6, and the start and stop of the trap lamp 3 and the electric shock net 4 are controlled by opening the switches 12; therefore, in a specific working procedure, the solar panel 10 converts light energy into electric energy, the electric energy charges the battery 9, the switch 12 is turned on, the battery 9 supplies power to the insect trap lamp 3 and the electric shock net 4, and insect prevention and control can be achieved through cooperation between the insect trap lamp 3 and the electric shock net 4.

Examples

In this embodiment, as shown in fig. 1 and fig. 7, the left and right sides of the first supporting ring 15 are horizontally provided with a sliding block 5 fixed on the outer side wall thereof, the sliding block 5 is provided with a second through hole which is vertically communicated, a sliding rod 18 is independently inserted in the second through hole, one end of the sliding rod 18 is fixed at the bottom of the supporting plate 6, and the other end is fixed on the connecting ring 1; therefore, when in use, the sliding block 5 can slide up and down along the sliding block 5, so that the first supporting ring 15 and the second supporting ring 8 are driven to slide up and down;

the outer side of the slide bar 18 is independently sleeved with a spring 19; one end of the spring 19 is fixed on the sliding block 5, and the other end of the spring is fixed on the connecting ring 1; in the natural state of the spring 19, the sliding block 5 is tightly attached to the bottom of the supporting plate 6; therefore, through the design of the spring 19, the position of the sliding block 5 can be limited at the bottom of the supporting plate 6, so that the first supporting ring 15 and the second supporting ring 8 are driven to be limited at the upper half part of the electric shock net 4; through the design of the sliding block 5 and the sliding rod 18, the first supporting ring 15 and the second supporting ring 8 can be more stable in the process of sliding up and down, so that the first brush 14 and the second brush 7 can brush the inner side wall and the outer side wall of the electric shock net 4 more stably.

Examples

The technology is further described in this embodiment, as shown in fig. 1 and 7, the handles 17 that facilitate the sliding of the sliding block 5 up and down are provided on the sliding block 5, and by the design of the handles 17, an operator uses both hands to operate the two handles 17 respectively, so that in the process of sliding the sliding block 5 up and down, the sliding block 5 can be easier and more convenient.

Claims (8)

1. The utility model provides an insecticidal device, includes backup pad (6) that the level set up, trap lamp (3) are installed to the bottom of backup pad (6), and the outside cover of trap lamp (3) has electric shock net (4) of fixing in backup pad (6) bottom, and electric shock net (4) are communicating cylindrical structure from top to bottom, its characterized in that: the top of the supporting plate (6) is fixed with a rain shield (16) through a supporting rod (11); the outer side of the electric shock net (4) is horizontally sleeved with a first supporting ring (15), the inner side wall of the first supporting ring (15) is provided with a first brush (14) for brushing off pests on the outer side wall of the electric shock net (4), the inner side of the electric shock net (4) is horizontally provided with a second supporting ring (8), and the outer side wall of the second supporting ring (8) is provided with a second brush (7) for brushing off the pests on the inner side wall of the electric shock net (4); the right side of the side wall of the electric shock net (4) is provided with a through groove which is communicated up and down, and a connecting rod (13) which can slide up and down in the through groove is horizontally arranged in the through groove; one end of the connecting rod (13) is connected to the second support ring (8), and the other end of the connecting rod is connected to the first support ring (15); a first funnel (22) for discharging pests brushed off by the second hairbrush (7) is fixed at the bottom of the electric shock net (4); a second funnel (21) for discharging pests brushed by the first hairbrush (14) is arranged below the first funnel (22), a connecting ring (1) is horizontally sleeved at the edge of a funnel opening of the second funnel (21), and the connecting ring (1) is fixed on the rain shield (16) through a fixed block; a supporting component for supporting the connecting ring (1) upwards is arranged below the connecting ring.

2. The insecticidal device of claim 1, wherein: the supporting component comprises a bottom plate (25) which is horizontally arranged, a fixing rod (24) is vertically fixed at the top of the bottom plate (25), the fixing rod (24) is fixed at the bottom of the connecting ring (1) through a plurality of connecting rods, a plurality of first through holes which are vertically communicated are formed in the bottom plate (25), and anchor nails (26) used for being driven into the ground are respectively penetrated in the first through holes.

3. The insecticidal device of claim 1, wherein: the discharge ports of the first funnel (22) and the second funnel (21) are connected and communicated; the discharge hole of the second funnel (21) is connected with a collecting frame (23) through threads.

4. The insecticidal device of claim 1, wherein: a solar panel (10) is arranged on the rain shield (16), and a battery (9) is fixed at the top of the supporting plate (6); the battery (9) is electrically connected with the solar panel (10), and the electric shock net (4) and the trap lamp (3) are respectively electrically connected with the battery (9).

5. The insecticidal device of claim 1, wherein: the left side and the right side of the first support ring (15) are horizontally provided with sliding blocks (5) fixed on the outer side walls of the first support ring, the sliding blocks (5) are provided with second through holes which are communicated up and down, sliding rods (18) are independently arranged in the second through holes in a penetrating mode, one ends of the sliding rods (18) are fixed at the bottom of the support plate (6), and the other ends of the sliding rods are fixed on the connecting ring (1); the outer side of the sliding rod (18) is independently sleeved with a spring (19); one end of a spring (19) is fixed on the sliding block (5), and the other end of the spring is fixed on the connecting ring (1); the sliding block (5) is tightly attached to the bottom of the supporting plate (6) under the natural state of the spring (19).

6. The insecticidal device of claim 5, wherein: the sliding blocks (5) are provided with handles (17) which are convenient for pulling the sliding blocks (5) to slide up and down.

7. The insecticidal device of claim 1, wherein: the outside of trap lamp (3) is overlapped and is had safety cover (2) to its protection, and safety cover (2) are located electric shock net (4) inboard.

8. The insecticidal device of claim 1, wherein: the bottom of the electric shock net (4) is hinged with a rotating block (20) for shielding the through groove through a hinge seat, and the rotating block (20) swings back and forth.