CN112088851A

CN112088851A - Gardens are with luring insect-catching device

Info

Publication number: CN112088851A
Application number: CN202011117553.7A
Authority: CN
Inventors: 杨志恒; 林博; 孙艳; 张娟; 李翰书
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2020-12-18
Anticipated expiration: 2040-10-19
Also published as: CN112088851B

Abstract

The invention relates to the technical field of trapping devices, and discloses a garden trapping and insect catching device which comprises supporting legs, wherein a motor cavity and an adjusting cavity are separated from the top ends of the supporting legs, one side surface of the adjusting cavity is connected with a pest killing bin, the upper end of the pest killing bin is provided with a trapping bin, the lower end of the pest killing bin is provided with a lower bin, a plurality of trapping inlets are uniformly distributed on four side surfaces of the trapping bin, the upper end of the trapping bin is provided with a control bin, turning plates are rotatably connected to the four side surfaces of the control bin, clamping grooves are formed in positions, corresponding to the turning plates, of the four side surfaces of the control bin, and solar panels are embedded into the inner sides of the clamping grooves. The invention integrates the trapping bin, the deinsectization bin and the blanking bin into a whole, realizes double trapping, realizes centralized killing treatment of insects, automatically adjusts and automatically blanks without manually cleaning the insect catching device at regular time, improves the cleanness of the insect catching device, and has integrated design, intelligent operation and high insect catching efficiency.

Description

Gardens are with luring insect-catching device

Technical Field

The invention relates to the technical field of trapping devices, in particular to a garden trapping and insect catching device.

Background

Gardens refer to the natural environment and the recreation country of specific cultivation, and at certain region application engineering technology and artistic means, through reforming transform topography, planting trees flowers and plants, building the building and arranging the beautiful natural environment and the recreation country that ways such as garden way was created, just be called gardens, in traditional building of china unique tree, have the ancient garden building of significant achievement, often have trees in some garden scenic spot and suffer the influence of plant diseases and insect pests, mosquito can infect the disease, makes trees grow the situation and hinder, even die.

Need artifically among the prior art to spout the insecticide to trees and kill insects, this method is the labour of wasting not only, the medicine also can produce the side effect to trees simultaneously, it is just to adopt pest trapping device to catch the insect in addition, but current pest trapping device is mostly fixed, it is inconvenient to remove, and it is not perfect enough to trap, can not in time trap and in time kill to some pests that vitality is stronger, can cause the pest to escape, landscape site tourist number is more simultaneously, it is more to save the mosquito in midsummer, the mood of playing of tourist has greatly been influenced. Accordingly, those skilled in the art have provided an attractant insect-catching apparatus for gardens which solves the problems set forth in the background art as described above.

Disclosure of Invention

The invention aims to provide an attraction and insect-catching device for gardens, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an attracting and catching device for gardens comprises supporting legs, wherein the bottom ends of the supporting legs are vertically connected with a base, the top ends of the supporting legs are internally divided into a motor cavity and an adjusting cavity, a driving motor is arranged inside the motor cavity, one side surface of the adjusting cavity is connected with an insect killing bin, the upper end of the insect killing bin is provided with an insect killing bin, the lower end of the insect killing bin is provided with a discharging bin, a plurality of trapping inlets are uniformly distributed on four side surfaces of the insect killing bin, a control bin is installed at the upper end of the insect killing bin, four side surfaces of the control bin are rotatably connected with turning plates, clamping grooves are formed in positions, corresponding to the turning plates, of the four side surfaces of the control bin, solar panels are embedded in the inner sides of the clamping grooves and one side surfaces of the turning plates, first magnetic sheets are embedded in positions, corresponding to the first magnetic sheets, second magnetic sheets are embedded in positions, corresponding to the first magnetic sheets, two trapping lamps are arranged on the lower surfaces of, the inside of traping the storehouse is located the lower surface mid-mounting in control storehouse and has the connecting rod, the bottom of connecting rod is connected with the storage trough, the internally mounted in deinsectization storehouse has the deinsectization board, the feed opening has been seted up to the inside bottom in feed bin down, the adjustment tank has been seted up to a side that an inside wall in deinsectization storehouse is located the regulation chamber, the internally mounted that the inboard of adjustment tank is located the regulation chamber has adjusting screw.

As a further scheme of the invention: the spout has all been seted up at the other three lateral walls middle parts in inside in deinsectization storehouse, the lower surface of feed bin corresponds feed opening department and installs down the flitch down, the surface rotation of flitch down is connected with electric putter, electric putter's the other end is located a side of landing leg and installs the free bearing, electric putter's one end is rotated with lower flitch and is connected, and electric putter's the other end and the free bearing rotate to be connected, electric putter is connected through the free bearing with the landing leg, the flitch rotates with lower feed bin to be connected down.

As a still further scheme of the invention: the slider is installed to three sides of deinsectization board corresponding spout department, and deinsectization board another side corresponds adjusting screw department and installs the regulation section of thick bamboo, the inboard of deinsectization board is provided with the electric wire netting, and the inboard middle part of deinsectization board corresponds feed opening department and has seted up the through-hole, the internal diameter of through-hole and the external diameter looks adaptation of storage trough.

As a still further scheme of the invention: slider and spout looks adaptation, the internal surface of adjusting cylinder and adjusting screw's surface all are provided with the screw thread, adjusting cylinder and adjusting screw threaded connection, adjusting screw's one end is rotated with the top of adjusting the chamber and is connected, and adjusting screw's the other end is connected with driving motor's output, the lower extreme of deinsectization board and the inside lower extreme of feed bin are a four sides trapezium structure.

As a still further scheme of the invention: one end of the connecting rod is fixedly connected with the middle part of the lower surface of the control bin, the other end of the connecting rod penetrates through the trapping bin, the deinsectization bin and the through hole to extend to the interior of the lower bin, the other end of the connecting rod is vertically connected with the middle part of the inner side of the food storage groove, and the four side surfaces of the lower bin and the four side surfaces of the deinsectization bin are all wrapped by the ventilating nets.

As a still further scheme of the invention: the trapping inlet is of a hollow round platform-shaped structure, the inner diameter of the trapping inlet is gradually reduced from outside to inside, fixing seats are arranged at two ends of the trapping lamp, and the trapping lamp and the control cabin are fixedly connected through the fixing seats.

As a still further scheme of the invention: the inside in control storehouse is provided with the battery, and the inside in control storehouse is located one side of battery and installs control chip, the inside in control storehouse is located one side of control chip and installs timer and charge-discharge controller side by side, control chip's input is connected with the output of battery.

As a still further scheme of the invention: one end of the turning plate is rotatably connected with the control bin through a hinge, the outer diameter of the turning plate is matched with the inner diameter of the clamping groove, and the magnetism of the opposite surfaces of the first magnetic sheet and the second magnetic sheet is opposite.

Compared with the prior art, the invention has the beneficial effects that: the invention designs an attracting and catching device for gardens, which integrates a trapping bin, a pest killing bin and a feeding bin during actual operation to realize double trapping of garden pests, firstly utilizes a trapping lamp to trap the pests into the trapping bin, then utilizes food induction in the pest killing bin to further trap the pests into the pest killing bin, facilitates concentrated killing treatment of the pests by utilizing a pest killing plate, and because the pest killing plate occupies the whole pest killing bin and the lower end of the pest killing plate is matched with the feeding bin, when the pest killing plate moves downwards from the top end of the pest killing bin, the pests in the pest killing bin can be killed by utilizing an electric network, and because of the matching of a timer and a control chip, the pest killing plate can be controlled in a timing way to kill the pests in the pest killing bin, and the intelligent operation can be realized by automatic adjustment and automatic feeding, the manual timing cleaning of the pest catching device is not needed, and the cleanness of the pest catching device is further improved, in addition, the rotatable solar panel can conveniently supply electric energy to the insect catching device, the integral structure of the design is simple, the integrated design can trap, kill and discharge insects, the intelligent operation is realized, the manual operation is not needed, and the insect catching efficiency is high.

Drawings

FIG. 1 is a schematic view showing the construction of an attractant insect-catching apparatus for gardens;

FIG. 2 is a schematic view showing the development of a turning plate in the insect attracting and catching device for gardens;

FIG. 3 is a schematic view showing the internal structure of a control cabin of an attractant insect-catching apparatus for gardens;

FIG. 4 is a schematic view showing the structure of a trap silo and a food storage tank in the trap device for use in gardens;

FIG. 5 is a schematic view showing the construction of an insect extermination cabin and a discharge cabin in the insect trapping and catching device for gardens;

fig. 6 is a schematic view showing a structure of an insect extermination plate in an induction insect catching apparatus for gardens.

In the figure: 1. a support leg; 2. an electric push rod; 3. a blanking plate; 4. discharging a bin; 5. a disinsection bin; 6. a trapping bin; 7. a trap inlet; 8. turning over a plate; 9. a control cabin; 10. hinging seat; 11. a base; 12. a motor cavity; 13. an adjustment chamber; 14. a drive motor; 81. a card slot; 82. a solar panel; 83. a first magnetic sheet; 84. a second magnetic sheet; 91. a storage battery; 92. a control chip; 93. a timer; 94. a charge and discharge controller; 61. a trap lamp; 62. a deinsectization board; 63. a connecting rod; 64. a food storage groove; 65. a power grid; 66. an adjusting cylinder; 67. a through hole; 68. a slider; 41. a chute; 42. an adjustment groove; 43. adjusting the screw rod; 44. and (4) a feed opening.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, in an embodiment of the present invention, an attracting and catching device for gardens includes a supporting leg 1, a base 11 is vertically connected to a bottom end of the supporting leg 1, a motor cavity 12 and an adjusting cavity 13 are partitioned at a top end of the supporting leg 1, a driving motor 14 is disposed inside the motor cavity 12, a side surface of the adjusting cavity 13 is connected to a pest killing bin 5, a pest killing bin 6 is disposed at an upper end of the pest killing bin 5, a lower bin 4 is disposed at a lower end of the pest killing bin 5, a plurality of trap inlets 7 are uniformly distributed on four side surfaces of the trap bin 6, a control bin 9 is disposed at an upper end of the trap bin 6, a storage battery 91 is disposed inside the control bin 9, a control chip 92 (adopting a TRF7960 microprocessor) is disposed at one side of the storage battery 91 inside the control bin 9, a timer 93 and a charge and discharge controller 94 are disposed in parallel at one side of the control chip, the input of the control chip 92 is connected to the output of the battery 91.

Flitch 3 is installed to the lower surface of feed bin 4 down corresponding feed opening 44 department, the surface rotation of flitch 3 is connected with electric putter 2 (adopts ANT series), the other end of electric putter 2 is located a side of landing leg 1 and installs free bearing 10, the one end of electric putter 2 rotates with feed bin 3 to be connected, and electric putter 2's the other end rotates with free bearing 10 to be connected, electric putter 2 is connected through free bearing 10 with landing leg 1, feed bin 3 rotates with feed bin 4 to be connected, through control chip 92 control electric putter 2 work, conveniently open feed bin 3, thereby the convenient inside worm that kills of feed bin 4 down can be discharged by feed opening 44, realize automatic row material, and avoid the staff will regularly clear up insect-catching device.

The middle parts of the other three side walls in the insect killing bin 5 are respectively provided with a sliding chute 41, three side surfaces of the insect killing plate 62 are respectively provided with a sliding block 68 corresponding to the sliding chute 41, the other side surface of the insect killing plate 62 is provided with an adjusting cylinder 66 corresponding to an adjusting screw 43, the inner side of the insect killing plate 62 is provided with a power grid 65, the middle part of the inner side of the insect killing plate 62 is provided with a through hole 67 corresponding to the feed opening 44, the inner diameter of the through hole 67 is matched with the outer diameter of the feed storage groove 64, the sliding block 68 is matched with the sliding chute 41, the inner surface of the adjusting cylinder 66 and the outer surface of the adjusting screw 43 are respectively provided with a thread, the adjusting cylinder 66 is in threaded connection with the adjusting screw 43, one end of the adjusting screw 43 is rotatably connected with the top of the adjusting cavity 13, the other end of the adjusting screw 43 is connected with the output end of the driving motor 14, the lower end of the insect killing plate 62 and the, insects enter the trapping bin 6 through the trapping inlet 7, then enter the trapping bin 6 and are induced by food in the food storage groove 64 again, the insects in the trapping bin 6 are induced into the insect killing bin 5 through the through holes 67, after a certain time, the driving motor 14 is controlled to work through the control chip 92, the driving motor 14 controls the adjusting screw 43 to rotate, the rotation of the adjusting screw 43 drives the adjusting cylinder 66 to adjust the surface of the adjusting cylinder, the adjusting cylinder 66 drives the insect killing plate 62 to move from top to bottom in the insect killing bin 5, when the insect killing plate 62 moves up and down in the insect killing bin 5, the firmness of the insect killing plate 62 can be further realized by the sliding of the sliding block 68 and the sliding groove 41, so that the insects in the insect killing bin 5 are killed, meanwhile, the control chip 92 also controls the power grid 65 to work, and the insects in the insect killing bin 5 are killed by the power grid 65, the killed insects fall into the feed bin 4 and are discharged from the feed opening 44.

The four sides of the control bin 9 are rotatably connected with the turning plates 8, the four sides of the control bin 9 are provided with clamping grooves 81 at positions corresponding to the turning plates 8, solar plates 82 are embedded in the inner sides of the clamping grooves 81 and one side of each turning plate 8, first magnetic sheets 83 are embedded in the positions, located at one ends of the solar plates 82, of the inner sides of the clamping grooves 81, second magnetic sheets 84 are embedded in the positions, corresponding to the first magnetic sheets 83, of the inner sides of the turning plates 8, one ends of the turning plates 8 are rotatably connected with the control bin 9 through hinges, the outer diameters of the turning plates 8 are matched with the inner diameters of the clamping grooves 81, the opposite surfaces of the first magnetic sheets 83 and the second magnetic sheets 84 are opposite in magnetism, when the insect catching device works, the turning plates 8 can be turned out from the clamping grooves 81, so that the inner sides of the turning plates 8 and the solar plates 82 in the clamping grooves 81 are exposed, therefore, the solar, the turnover plate 8 can be turned into the clamping groove 81, the turnover plate 8 is convenient to store, and the first magnetic sheet 83 and the second magnetic sheet 84 are fixed in the clamping groove 81 in an attracting mode.

Two trapping lamps 61 are arranged in parallel on the lower surface of the control bin 9 in the trapping bin 6, a connecting rod 63 is arranged in the middle of the lower surface of the control bin 9 in the trapping bin 6, a food storage groove 64 is connected to the bottom end of the connecting rod 63, one end of the connecting rod 63 is fixedly connected with the middle of the lower surface of the control bin 9, the other end of the connecting rod 63 penetrates through the trapping bin 6, the insect killing bin 5 and the through hole 67 to extend into the lower bin 4, the other end of the connecting rod 63 is vertically connected with the middle of the inner side of the food storage groove 64, the four side surfaces of the lower bin 4 and the insect killing bin 5 are wrapped with air permeable nets, the trapping inlet 7 is of a hollow circular truncated cone-shaped structure, the inner diameter of the trapping inlet 7 is gradually reduced from outside to inside, fixing seats are arranged at the two ends of the trapping lamps 61, the trapping lamps 61 are fixedly connected with the control bin 9 through the fixing seats, when the insect trapping, then will trap storehouse 6 and deinsectization storehouse 5 and be connected fixedly (adopt the bolt fastening), fixed storage trough 64 runs through-hole 67 and is located feed bin 4 down, when traping, the insect gets into in trapping storehouse 6 through trapping import 7, after the food induction in the storage trough 64 of feed bin 4 inside down again, can lure the insect in trapping storehouse 6 into deinsectization storehouse 5, it is required to explain that deinsectization storehouse 5 and feed bin 4 are link up, consequently when the insect gets into deinsectization storehouse 5, can utilize deinsectization board 62 to kill its inside insect, the insect after killing can fall into to feed bin 4 bottom down, discharge through feed opening 44.

The internally mounted of deinsectization storehouse 5 has deinsectization board 62, feed opening 44 has been seted up to the inside bottom of feed bin 4, adjustment tank 42 has been seted up to a side that an inside wall of deinsectization storehouse 5 is located adjustment chamber 13, the internally mounted that the inboard of adjustment tank 42 is located adjustment chamber 13 has adjusting screw 43, deinsectization board 62 is when the deinsectization, through control chip 92 control driving motor 14 work, and then driving motor 14 control adjusting screw 43 rotates, and then drive adjusting cylinder 66 by adjusting screw 43 and reciprocate, and then adjusting cylinder 66 then can drive deinsectization board 62 and reciprocate in deinsectization storehouse 5, and when removing, can utilize slider 68 and spout 41 further to improve deinsectization board 62 and remove in deinsectization storehouse 5.

The working principle of the invention is as follows: when the invention works, the insect catching device is placed in a garden, the turning plate 8 is turned out from the clamping groove 81 on the outer side surface of the control bin 9, so that the inner side surface of the turning plate 8 and the solar panel 82 in the clamping groove 81 are exposed, the solar panel 82 is utilized to convert light energy into electric energy, the converted electric energy is subjected to voltage transformation through the charging and discharging controller 94 and then is stored in the storage battery 91, further, the trap lamp 61 is controlled to work through the control chip 92, the trap lamp 61 is utilized to trap insects, the trapped insects enter the trap bin 6 through the trap inlet 7 and then are subjected to secondary induction of trapping food in the food storage tank 64, so that the insects in the trap bin 6 enter the deinsectization bin 5 through the through hole 67, the timer 93 is set before, and after a certain time of trapping, the timer 93 transmits signals to the control chip 92, the control chip 92 controls the driving motor 14 to work, the driving motor 14 drives the adjusting screw 43 to rotate, the adjusting screw 43 drives the adjusting cylinder 66 to move up and down, the adjusting cylinder 66 drives the insect killing plate 62 to move downwards along the top end of the insect killing bin 5, meanwhile, the control chip 92 controls the power grid 65 to work, so as to kill insects in the insect killing bin 5, the killed insects fall into the lower bin 4 from the insect killing bin 5 and are discharged through the lower port 44 at the bottom end inside the lower bin 4, when the insect killing plate 62 moves downwards from the insect killing bin 5 for a certain time, the control chip 92 controls the electric push rod 2 to work, the electric push rod 2 retracts to turn the lower plate 3 out from the lower port 44, and the killed insects at the bottom end inside the lower bin 4 are discharged through the lower port 44, the design is simple and convenient to operate and move, meanwhile, due to the double trapping operation, insects can be induced, and can be conveniently killed, meanwhile, the insects are easy to clean, and the labor force of workers is reduced.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An attracting and catching device for gardens comprises supporting legs (1) and is characterized in that the bottom ends of the supporting legs (1) are vertically connected with a base (11), a motor cavity (12) and an adjusting cavity (13) are separated from the top ends of the supporting legs (1), a driving motor (14) is arranged inside the motor cavity (12), one side surface of the adjusting cavity (13) is connected with a pest killing bin (5), the upper end of the pest killing bin (5) is provided with a trapping bin (6), the lower end of the pest killing bin (5) is provided with a lower bin (4), a plurality of trapping inlets (7) are uniformly distributed on four side surfaces of the trapping bin (6), a control bin (9) is installed at the upper end of the trapping bin (6), turning plates (8) are rotatably connected on four side surfaces of the control bin (9), and clamping grooves (81) are formed in positions, corresponding to the turning plates (8), of the four side surfaces of the control bin (9), solar panels (82) are embedded into the inner side of the clamping groove (81) and one side face of the turning plate (8), a first magnetic sheet (83) is embedded into one end, located on the solar panel (82), of the inner side of the clamping groove (81), a second magnetic sheet (84) is embedded into the inner side face, corresponding to the first magnetic sheet (83), of the turning plate (8), two trapping lamps (61) are arranged in the trapping bin (6) and located on the lower surface of the control bin (9), a connecting rod (63) is installed in the middle of the lower surface, located on the control bin (9), of the trapping bin (6), the bottom end of the connecting rod (63) is connected with a food storage groove (64), a deinsectization plate (62) is installed in the deinsectization bin (5), a discharging hole (44) is formed in the bottom end of the lower bin (4), and an adjusting groove (42) is formed in one side face, located on the adjusting cavity (13), of one inner, and an adjusting screw rod (43) is arranged inside the adjusting cavity (13) on the inner side of the adjusting groove (42).

2. The attraction and insect-catching device for gardens as claimed in claim 1, wherein the middle of the other three side walls of the interior of the insect-killing bin (5) is provided with a chute (41), the lower surface of the lower bin (4) corresponding to the feed opening (44) is provided with a blanking plate (3), the outer surface of the blanking plate (3) is rotatably connected with an electric push rod (2), the other end of the electric push rod (2) is positioned on one side surface of the supporting leg (1) and is provided with a hinged support (10), one end of the electric push rod (2) is rotatably connected with the blanking plate (3), the other end of the electric push rod (2) is rotatably connected with the hinged support (10), the electric push rod (2) is connected with the supporting leg (1) through the hinged support (10), and the blanking plate (3) is rotatably connected with the lower bin (4).

3. The attraction and insect-catching device for gardens as claimed in claim 2, wherein three sides of the insect-killing plate (62) are provided with sliding blocks (68) corresponding to the sliding grooves (41), the other side of the insect-killing plate (62) is provided with adjusting cylinders (66) corresponding to the adjusting screws (43), the inner side of the insect-killing plate (62) is provided with an electric network (65), the middle part of the inner side of the insect-killing plate (62) corresponding to the feed opening (44) is provided with a through hole (67), and the inner diameter of the through hole (67) is matched with the outer diameter of the feed storage groove (64).

4. An attractant insect-catching device for gardens as claimed in claim 3 wherein said slider (68) is adapted to the chute (41), both the inner surface of said adjusting cylinder (66) and the outer surface of said adjusting screw (43) are provided with threads, said adjusting cylinder (66) is in threaded connection with said adjusting screw (43), one end of said adjusting screw (43) is rotatably connected to the top of the adjusting chamber (13), and the other end of said adjusting screw (43) is connected to the output end of the driving motor (14), the lower end of said insect-killing plate (62) and the inner lower end of the lower bin (4) are both of a four-sided trapezoidal structure.

5. An attraction and insect-catching device for gardens as claimed in claim 3 wherein one end of the connecting rod (63) is fixedly connected with the middle of the lower surface of the control cabin (9), and the other end of the connecting rod (63) extends to the inside of the lower bin (4) through the trapping cabin (6), the insect-killing cabin (5) and the through hole (67), the other end of the connecting rod (63) is vertically connected with the middle of the inner side of the food storage groove (64), and the four sides of the lower bin (4) and the insect-killing cabin (5) are wrapped with air-permeable nets.

6. An attractant insect-catching device for gardens as claimed in claim 1 wherein said trapper inlet (7) is a hollow round platform structure, the inner diameter of the trapper inlet (7) is gradually reduced from outside to inside, the ends of said trapper lamp (61) are provided with fixing seats, and the trapper lamp (61) and the control cabin (9) are fixedly connected through the fixing seats.

7. An attracting and catching device for gardens as claimed in claim 1, wherein a storage battery (91) is arranged inside the control cabin (9), a control chip (92) is arranged inside the control cabin (9) at one side of the storage battery (91), a timer (93) and a charge-discharge controller (94) are arranged in parallel at one side of the control chip (92) inside the control cabin (9), and the input end of the control chip (92) is connected with the output end of the storage battery (91).

8. An attraction and insect-catching device for gardens as claimed in claim 1 wherein one end of the turning plate (8) is rotatably connected with the control cabin (9) through a hinge, the outer diameter of the turning plate (8) is adapted to the inner diameter of the slot (81), and the opposite surfaces of the first magnetic sheet (83) and the second magnetic sheet (84) have opposite magnetism.