CN110994539A

CN110994539A - Multifunctional circuit protection device

Info

Publication number: CN110994539A
Application number: CN202010038826.2A
Authority: CN
Inventors: 不公告发明人
Original assignee: Ningbo Lixiang Electronics Co ltd
Current assignee: Ningbo Lixiang Electronics Co ltd
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-04-10

Abstract

The invention discloses a multifunctional circuit protection device, which comprises a shell, wherein a live wire and a zero line are arranged in the shell, the live wire and the zero line below the shell are connected with power supply equipment, the live wire and the zero line above the shell are connected with electric equipment, a first cavity is arranged at the left lower side of the shell, a first switch is fixedly arranged on the lower end surface of the first cavity, the lower end of the first switch is connected with the live wire, the device is simple in structure and high in automation degree, can be used for dealing with various circuit problems, including circuit overload, circuit undervoltage, circuit overheating and the like, has certain automatic adjusting capacity, can automatically adjust current within a certain range, and is also provided with alarm equipment for alarming when the current exceeds a limit value.

Description

Multifunctional circuit protection device

Technical Field

The invention relates to the field of circuit protection, in particular to a multifunctional circuit protection device.

Background

The circuit protection mainly protects components in an electronic circuit from being damaged under the conditions of overvoltage, overcurrent, surge, electromagnetic interference and the like, along with the development of scientific technology, electric power/electronic products are increasingly diversified and complicated, and applied circuit protection elements are simple glass tube fuses except for Sunday, and generally, the protection devices comprise piezoresistors, TVS, gas discharge tubes and the like. Has been developed into a wide variety of new electronic device fields.

At the present stage, a general circuit protection device can only deal with the problem of a single circuit, cannot adjust the circuit and only can play a disposable role.

Disclosure of Invention

In view of the above technical deficiencies, the present invention provides a multifunctional circuit protection device, which can overcome the above drawbacks.

The invention relates to a multifunctional circuit protection device, which comprises a shell, wherein a live wire and a zero wire are arranged in the shell, the live wire and the zero wire below the shell are connected with power supply equipment, the live wire and the zero wire above the shell are connected with electric equipment, a first cavity is arranged at the left lower side of the shell, a first switch is fixedly arranged on the lower end surface of the first cavity, the lower end of the first switch is connected with the live wire, a second switch is arranged above the first switch, the upper end of the second switch is fixedly arranged on the lower end surface of a first rotating body, the first rotating body is fixedly arranged on a first rotating shaft, the first rotating shaft is rotatably arranged on the front end wall and the rear end wall of the first cavity, an expansion cavity is arranged below the right side of the rotating body, an expansion block is arranged in the expansion cavity, a heating metal wire is arranged below the expansion block, and two ends of the heating metal wire are connected with the, the improved blade-rotating mechanism is characterized in that a second cavity is arranged in the first cavity right upper portion shell, a rotating motor is fixedly mounted on the second cavity right end wall, the rotating motor is respectively connected with the upper end of a second switch and a zero line, a second rotating shaft is connected to the rotating motor in a power mode, a second rotating body is fixedly mounted on the second rotating shaft, blades are fixedly mounted on the second rotating outer wall, a protection mechanism is arranged in the second cavity on the rotating side and the right side of the blades, a third cavity is arranged on the right side of the second cavity, a first coil is arranged in the third cavity, a first iron core is arranged in the first coil, a fourth cavity is arranged on the right side of the third cavity, and an adjusting mechanism and an alarm mechanism are arranged in the fourth cavity.

Beneficially, the protection mechanism comprises a first limiting block fixedly mounted on the front and rear end walls of the third cavity, a first spring is connected to the right end face of the first limiting block, a left switch is connected to the right end of the first spring, a left hook is fixedly mounted on the right end face of the left switch, the left hook can move left and right in a first sliding chute fixedly mounted in the third cavity, the upper end and the lower end of the left switch can be in contact with a right switch fixedly mounted in the third cavity, the upper end and the lower end of the right switch are both connected with the fire wire, a right hook is arranged above the left hook, the right end of the right hook is hinged and mounted on a fixed block through a third rotating shaft, the fixed block is fixedly mounted on the right end face of the third cavity, the third rotating shaft is rotatably mounted in the front and rear end faces of the third cavity, and a third rotating body and a fourth rotating body are arranged below the right hook, the third rotating body and the fourth rotating body are respectively and fixedly arranged on the fourth rotating shaft and the fifth rotating shaft, the fourth rotating shaft and the fifth rotating shaft are respectively and rotatably arranged in the front end surface and the rear end surface of the third cavity, the left side of the lower end surface of the third rotating body is connected with a second spring, the lower end of the second spring is fixedly arranged on a second limiting block, the second limiting block is fixedly arranged in the third cavity, the right side of the lower end surface of the fourth rotating body is connected with a third spring, the lower end of the third spring is fixedly arranged on a third limiting block, the third limiting block is fixedly arranged in the third cavity, a second coil and a third coil are respectively arranged below the third rotating body and the fourth rotating body, a second iron core and a third iron core are respectively arranged in the second coil and the third coil, and the second iron core and the third iron core are both fixedly arranged in the third cavity, and two ends of the second coil are connected with the live wire, and one end of the third coil is connected with the live wire and the other end of the third coil is connected with the zero line.

Advantageously, the adjusting mechanism comprises a resistor fixedly installed in the fourth cavity, a wire is contacted with the upper end of the resistor, the wire is fixedly installed on the upper rack, the left end of the upper rack can slide in a guide rail fixed in the fourth cavity, the upper rack can integrally move in an upper rack groove, the lower end of the upper rack is meshed with a double gear, an upper belt wheel is fixedly installed on the front end face of the upper gear, the upper gear and the upper belt wheel are coaxially and fixedly installed on a sixth rotating shaft, and two ends of the sixth rotating shaft are rotatably installed in the front end face and the rear end face of the fourth cavity.

Beneficially, the alarm mechanism comprises a lower gear, a lower belt wheel is fixedly mounted on the front end face of the lower gear, the lower belt wheel is connected with the upper belt wheel through a belt, the lower gear and the lower belt wheel are coaxially and fixedly mounted on a seventh rotating shaft, one end of the seventh rotating shaft rotates in the rear end face of the fourth cavity, the lower end of the lower gear is engaged with an iron rack, the iron rack can move in a second rack groove, a third transmission gear engaged with the iron rack is arranged on the right side of the lower gear, the third rotating gear is fixedly mounted on an eighth rotating shaft, one end of the eighth rotating shaft is rotatably mounted in the rear end face of the fourth cavity, a fourth transmission gear is engaged on the right side of the third transmission gear, a fifth transmission gear is fixedly mounted on the front end face of the fourth transmission gear, and the fourth transmission gear and the fifth transmission gear are coaxially and fixedly mounted on a ninth rotating shaft, ninth pivot one end is rotated and is installed in the fourth cavity rear end face, the meshing of fifth drive gear right side has sixth drive gear, fixed mounting has the backplate on the sixth drive gear preceding terminal surface, the backplate front end is provided with the metal sheet, the metal sheet front end is provided with preceding baffle, the backplate preceding baffle with sixth drive gear fixed mounting is in the tenth pivot, tenth pivot both ends are rotated and are installed in the end wall around the fourth cavity, be provided with spacing axle in the middle of the metal sheet, spacing axle both ends fixed mounting be in both ends about backplate and the preceding baffle, the metal sheet outer end is provided with collision frame, collision frame fixed mounting is in on the fourth cavity front end face, the iron rack right side is provided with the magnet of fixed mounting on the fourth cavity right-hand member face.

The invention has the beneficial effects that: the device simple structure to degree of automation is high, can deal with multiple circuit problem, and including the circuit overload, the circuit is under-voltage, and the circuit is overheated etc. and possess certain automatically regulated ability, can adjust the electric current by oneself in certain extent, and the device has still been equipped with alarm device, can report to the police when the electric current surpasss the limit value.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view in the direction A-A of FIG. 1 according to an embodiment of the present invention;

fig. 3 is an enlarged schematic view of the structure at B in fig. 1 according to the embodiment of the present invention.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

The invention will now be described in detail with reference to fig. 1-3, for the sake of convenience, the orientations described hereinafter being defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

With reference to fig. 1-3, the multifunctional circuit protection device includes a housing 1, a live wire 56 and a zero wire 57 are disposed in the housing 1, the live wire 56 and the zero wire 57 below the housing 1 are connected to a power supply 54, the live wire 56 and the zero wire 57 above the housing 1 are connected to a power utilization 55, a first cavity 61 is disposed at a lower left side of the housing 1, a first switch 59 is fixedly mounted on a lower end surface of the first cavity 61, a lower end of the first switch 59 is connected to the live wire 56, a second switch 6 is disposed above the first switch 59, an upper end of the second switch 6 is fixedly mounted on a lower end surface of a first rotor 7, the first rotor 7 is fixedly mounted on a first rotating shaft 8, the first rotating shaft 8 is rotatably mounted on front and rear end walls of the first cavity 61, an expansion cavity 62 is disposed below a right side of the rotor 8, an expansion block 9 is disposed in the expansion cavity 62, a heating metal wire 10 is arranged below the expansion block 9, two ends of the heating metal wire 10 are connected with the live wire 56, a second cavity 63 is arranged in the casing 1 above the right of the first cavity 61, a rotating motor 3 is fixedly mounted on the right end wall of the second cavity 63, the rotating motor 3 is respectively connected with the upper end of the second switch 6 and the zero wire 57, the rotating motor 3 is in power connection with a second rotating shaft 4, a second rotating body 5 is fixedly mounted on the second rotating shaft 4, a blade 2 is fixedly mounted on the outer wall of the second rotating body 5, a protection mechanism 71 is arranged in the second cavity 63 at the right sides of the rotating body 5 and the blade 6, a third cavity 64 is arranged at the right side of the second cavity 63, a first coil 11 is arranged in the third cavity 64, a first iron core 74 is arranged in the first coil 11, and a fourth cavity 66 is arranged at the right side of the third cavity 64, an adjusting mechanism 72 and an alarm mechanism 73 are arranged in the fourth cavity 66.

Advantageously, the protection mechanism 71 comprises a first limit block 58 fixedly mounted on the front and rear end walls of the third cavity 64, a first spring 37 is connected to the right end face of the first limit block 58, a left switch 53 is connected to the right end of the first spring 37, a left hook 38 is fixedly mounted on the right end face of the left switch 53, the left hook 38 can move left and right in a first sliding slot 65 fixedly mounted in the third cavity 64, the upper and lower ends of the left switch 53 can be in contact with a right switch 39 fixedly mounted in the third cavity 64, the upper and lower ends of the right switch 39 are connected with the live wire 56, a right hook 47 is arranged above the left hook 38, the right end of the right hook 47 is hinged to a fixed block 45 through a third rotating shaft 46, the fixed block 45 is fixedly mounted on the right end face of the third cavity 64, the third rotating shaft 46 is rotatably mounted in the front and rear end faces of the third cavity 64, a third rotating body 48 and a fourth rotating body 44 are arranged below the right hook 47, the third rotating body 48 and the fourth rotating body 44 are respectively and fixedly installed on the fourth rotating shaft 49 and the fifth rotating shaft 43, the fourth rotating shaft 49 and the fifth rotating shaft 43 are respectively and rotatably installed in the front and rear end surfaces of the third cavity 64, the left side of the lower end surface of the third rotating body 49 is connected with a second spring 51, the lower end of the second spring 51 is fixedly installed on a second limiting block 52, the second limiting block 52 is fixedly installed in the third cavity 64, the right side of the lower end surface of the fourth rotating body 44 is connected with a third spring 50, the lower end of the third spring 50 is fixedly installed on a third limiting block 42, the third limiting block 42 is fixedly installed in the third cavity 64, a second coil 40 and a third coil 41 are respectively arranged below the third rotating body 48 and the fourth rotating body 44, a second iron core 75 and a third iron core 76 are respectively arranged in the second coil 40 and the third coil 41, the second iron core 75 and the third iron core 76 are both fixedly installed in the third cavity 64, both ends of the second coil 40 are both connected with the live wire 56, and one end of the third coil 41 is connected with the live wire 56 and the other end is connected with the zero wire 57.

Advantageously, the adjusting mechanism 72 includes a resistor 15 fixedly installed in the fourth cavity 66, the upper end of the resistor 15 is in contact with the wire 14, the wire 14 is fixedly installed on the upper rack 12, the left end of the upper rack 12 is slidable in the guide rail 13 fixed in the fourth cavity 66, the upper rack 12 is entirely movable in the upper rack groove 67, the lower end of the upper rack 12 is engaged with the double gear 16, the front end surface of the upper gear 16 is fixedly installed with the upper pulley 17, the upper gear 16 and the upper pulley 17 are coaxially and fixedly installed on the sixth rotating shaft 18, and both ends of the sixth rotating shaft 18 are rotatably installed in the front and rear end surfaces of the fourth cavity 66.

Advantageously, the alarm mechanism 73 includes a lower gear 22, a lower pulley 23 is fixedly mounted on a front end surface of the lower gear 22, the lower pulley 23 is connected with the upper pulley 16 through a belt 19, the lower gear 22 and the lower pulley 23 are coaxially and fixedly mounted on a seventh rotating shaft 21, one end of the seventh rotating shaft 21 rotates in a rear end surface of the fourth cavity 66, the lower end of the lower gear 22 is engaged with an iron rack 20, the iron rack 20 is movable in a second rack groove 68, a third transmission gear 25 engaged with the iron rack 20 is disposed on a right side of the lower gear 22, the third rotating gear 25 is fixedly mounted on an eighth rotating shaft 24, one end of the eighth rotating shaft 24 is rotatably mounted in a rear end surface of the fourth cavity 66, a fourth transmission gear 27 is engaged with a right side of the third transmission gear 25, and a fifth transmission gear 28 is fixedly mounted on a front end surface of the fourth transmission gear 27, the fourth transmission gear 27 and the fifth transmission gear 28 are coaxially and fixedly installed on a ninth rotating shaft 26, one end of the ninth rotating shaft 26 is rotatably installed in the rear end surface of the fourth cavity 66, the right side of the fifth transmission gear 28 is engaged with the sixth transmission gear 29, a rear baffle 31 is fixedly installed on the front end surface of the sixth transmission gear 29, a metal plate 32 is arranged at the front end of the rear baffle 31, a front baffle 33 is arranged at the front end of the metal plate 32, the rear baffle 31, the front baffle 33 and the sixth transmission gear 29 are fixedly installed on a tenth rotating shaft 30, two ends of the tenth rotating shaft 30 are rotatably installed in the front end wall and the rear end wall of the fourth cavity 66, a limiting shaft 34 is arranged in the middle of the metal plate 32, two ends of the limiting shaft 34 are fixedly installed in the upper end and the lower end of the rear baffle 31 and the front baffle 33, and an impact frame 35 is arranged at, the collision frame 35 is fixedly installed on the front end face of the fourth cavity 66, and the magnet 36 fixedly installed on the right end face of the fourth cavity 66 is arranged on the right side of the iron rack 20.

In the initial state, the left hook 38 and the right hook 47 are in contact, the second rotator 48 is in a horizontal state, the left end of the third rotator 44 is attracted by the third coil 41, the rotary electric machine 3 does not operate, and the right end of the iron rack 20 is in contact with the magnet 36.

When the device starts to work, the mechanical action sequence of the whole device is as follows:

1. when the current in the circuit is large and the temperature is high, the temperature of the heating metal wire 10 gradually rises at the moment, the temperature of the heating metal wire 10 gradually rises to cause the expansion block 9 to expand in the expansion cavity 62, the expansion block 9 expands to jack the right end of the first rotating body 7 up and the left end moves down, the left end of the first rotating body 7 moves down to make the first switch 59 and the second switch 6 contact, the first switch 59 and the second switch 6 contact to make the rotating motor 3 electrified, the rotating motor 3 is electrified to drive the second rotating shaft 4 to rotate, the second rotating shaft 4 rotates to drive the second rotating body 5 and the blades 2 to rotate, and the second rotating body 5 and the blades 2 rotate to cool the circuit in an air cooling mode.

2. When the current in the circuit is further increased, the magnetic field generated by the first coil 11 is enhanced, the attraction force on the iron rack 20 is greater than the attraction force of the magnet 36, the iron rack 20 is attracted leftwards, the iron rack 20 moves leftwards to drive the lower gear 22 to rotate, the lower gear 22 rotates to drive the lower pulley 23 to rotate, the lower pulley 23 rotates to drive the upper pulley 16 to rotate through the belt 19, the upper pulley 16 rotates to drive the upper gear 16 to rotate, the upper gear 16 rotates to drive the upper rack 12 to move rightwards, the upper rack 12 moves rightwards to drive the metal wire 14 to move rightwards, and at the moment, the resistance value of the resistor 14 connected to the circuit is continuously increased, so that the current in the circuit is reduced.

3. At this time, the current in the circuit is reduced, the magnetic field generated by the first coil 11 is weakened, the attraction force to the iron rack 20 is smaller than that of the magnet 36, then the movement in 2 is reversed, and then the reciprocating movement is carried out, and the current in the circuit is continuously increased and reduced until the circuit is stabilized.

4. The iron rack 20 reciprocates left and right to drive the third transmission gear 25 to reciprocate forward and backward, the third transmission gear 25 rotates to drive the fourth transmission gear 27 to rotate, the fourth transmission gear 27 rotates to drive the fifth transmission gear 28 to rotate, the fifth transmission gear 28 rotates to drive the sixth transmission gear 29 to rotate, the sixth transmission gear 29 rotates to drive the tenth rotating shaft 30 to rotate, the tenth rotating shaft 30 rotates to drive the rear baffle 31 and the front baffle 33 to rotate, the rear baffle 31 and the front baffle 33 rotate to drive the limiting shaft 34 and the metal plate 32 to rotate, and the metal plate 32 rotates to collide with the collision frame 35 to send an alarm.

5. When a short circuit or other conditions occur in the circuit to cause the current in the circuit to be overlarge, the magnetic field of the second coil 40 is strengthened to attract the right end of the third rotating body 48 to move downwards and upwards, so that the left hook 38 and the right hook 47 are separated from contact, and the power failure treatment is carried out on the circuit.

6. When the voltage across the circuit is too low, the left end of the third rotator 44 cannot be attracted by the third coil 41, and moves upward under the action of the third spring 50, so that the left hook 38 and the right hook 47 are separated from contact, and the circuit is powered off.

The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.

Claims

1. A multifunctional circuit protection device comprises a shell, wherein a live wire and a zero wire are arranged in the shell, the live wire and the zero wire below the shell are connected with a power supply device, the live wire and the zero wire above the shell are connected with a power consumption device, a first cavity is arranged on the left lower side of the shell, a first switch is fixedly arranged on the lower end face of the first cavity, the lower end of the first switch is connected with the live wire, a second switch is arranged above the first switch, the upper end of the second switch is fixedly arranged on the lower end face of a first rotating body, the first rotating body is fixedly arranged on a first rotating shaft, the first rotating shaft is rotatably arranged on the front end wall and the rear end wall of the first cavity, an expansion cavity is arranged below the right side of the rotating body, an expansion block is arranged in the expansion cavity, a heating metal wire is arranged below the expansion block, and two ends of the heating metal wire are connected with the live, the improved blade-rotating mechanism is characterized in that a second cavity is arranged in the first cavity right upper portion shell, a rotating motor is fixedly mounted on the second cavity right end wall, the rotating motor is respectively connected with the upper end of a second switch and a zero line, a second rotating shaft is connected to the rotating motor in a power mode, a second rotating body is fixedly mounted on the second rotating shaft, blades are fixedly mounted on the second rotating outer wall, a protection mechanism is arranged in the second cavity on the rotating side and the right side of the blades, a third cavity is arranged on the right side of the second cavity, a first coil is arranged in the third cavity, a first iron core is arranged in the first coil, a fourth cavity is arranged on the right side of the third cavity, and an adjusting mechanism and an alarm mechanism are arranged in the fourth cavity.

2. A multifunctional circuit protection device as claimed in claim 1, wherein: the protection mechanism comprises a first limiting block fixedly arranged on the front end wall and the rear end wall of a third cavity, a first spring is connected on the right end face of the first limiting block, a left switch is connected on the right end face of the first spring, a left hook is fixedly arranged on the right end face of the left switch, the left hook can move left and right in a first chute fixedly arranged in the third cavity, the upper end and the lower end of the left switch can be in contact with a right switch fixedly arranged in the third cavity, the upper end and the lower end of the right switch are both connected with the fire wire, a right hook is arranged above the left hook, the right end of the right hook is hinged and arranged on a fixed block through a third rotating shaft, the fixed block is fixedly arranged on the right end face of the third cavity, a third rotating shaft is rotatably arranged in the front end face and the rear end face of the third cavity, a third rotating body and a fourth rotating body are arranged below the right hook, the third rotating body and the fourth rotating body are respectively and fixedly arranged on the, the fourth rotating shaft and the fifth rotating shaft are respectively and rotatably arranged in the front end surface and the rear end surface of the third cavity, the left side of the lower end surface of the third rotating body is connected with a second spring, the lower end of the second spring is fixedly arranged on a second limiting block which is fixedly arranged in the third cavity, the right side of the lower end surface of the fourth rotating body is connected with a third spring, the lower end of the third spring is fixedly arranged on a third limiting block, the third limiting block is fixedly arranged in the third cavity, a second coil and a third coil are respectively arranged below the third rotating body and the fourth rotating body, a second iron core and a third iron core are respectively arranged in the second coil and the third coil, the second iron core and the third iron core are both fixedly arranged in the third cavity, and two ends of the second coil are connected with the live wire, and one end of the third coil is connected with the live wire and the other end of the third coil is connected with the zero line.

3. A multifunctional circuit protection device as claimed in claim 1, wherein: the adjusting mechanism comprises a resistor fixedly installed in the fourth cavity, a metal wire is in contact with the upper end of the resistor, the metal wire is fixedly installed on the upper rack, the left end of the upper rack can be fixed in a guide rail in the fourth cavity to slide, the upper rack can integrally move in an upper rack groove, the lower end of the upper rack is meshed with a double gear, an upper belt wheel is fixedly installed on the front end face of the upper gear, the upper gear and the upper belt wheel are coaxially and fixedly installed on a sixth rotating shaft, and the two ends of the sixth rotating shaft are rotatably installed in the front end face and the rear end face of the fourth cavity.

4. A multifunctional circuit protection device as claimed in claim 1, wherein: the alarm mechanism comprises a lower gear, a lower belt wheel is fixedly mounted on the front end face of the lower gear, the lower belt wheel is connected with the upper belt wheel through a belt, the lower gear and the lower belt wheel are coaxially and fixedly mounted on a seventh rotating shaft, one end of the seventh rotating shaft is rotated in the rear end face of the fourth cavity, an iron rack is meshed at the lower end of the lower gear and can move in a second rack groove, a third transmission gear meshed with the iron rack is arranged on the right side of the lower gear, a third rotating gear is fixedly mounted on an eighth rotating shaft, one end of the eighth rotating shaft is rotatably mounted in the rear end face of the fourth cavity, a fourth transmission gear is meshed on the right side of the third transmission gear, a fifth transmission gear is fixedly mounted on the front end face of the fourth transmission gear, and the fourth transmission gear and the fifth transmission gear are coaxially and fixedly mounted on a ninth rotating shaft, ninth pivot one end is rotated and is installed in the fourth cavity rear end face, the meshing of fifth drive gear right side has sixth drive gear, fixed mounting has the backplate on the sixth drive gear preceding terminal surface, the backplate front end is provided with the metal sheet, the metal sheet front end is provided with preceding baffle, the backplate preceding baffle with sixth drive gear fixed mounting is in the tenth pivot, tenth pivot both ends are rotated and are installed in the end wall around the fourth cavity, be provided with spacing axle in the middle of the metal sheet, spacing axle both ends fixed mounting be in both ends about backplate and the preceding baffle, the metal sheet outer end is provided with collision frame, collision frame fixed mounting is in on the fourth cavity front end face, the iron rack right side is provided with the magnet of fixed mounting on the fourth cavity right-hand member face.