A magnetic switch

Abstract

A magnetic switch, the magnetic switch comprising a signal transmitter, a signal receiver and a radiation isolation lead plate; the left side of the radiation isolation lead plate is connected to the right side of the signal receiver, and the right side of the radiation isolation lead plate is connected to the left side of the signal transmitter; the signal transmitter includes a transmitter housing, a permanent magnet assembly and an electromagnet assembly. An arc-shaped groove penetrating through both ends of the transmitter housing upward is provided on the right side surface of the transmitter housing. A through hole penetrating through the transmitter housing is provided on the right side surface of the transmitter housing. The through hole is located below the arc-shaped groove. A fixing foot is installed at each of the four corners of the side circumference of the transmitter housing. All the fixing feet are connected to the side surface of the radiation isolation lead plate. In this design, after the laboratory door is closed and the entire environment is in an electric cage state, after the electromagnetic signal is shielded, wireless communication can be carried out, realizing the transmission of digital control signals between the inside and outside of the lead plate space with complete electromagnetic shielding.

Description

Technical Field

[0001] The present invention relates to an improvement in signal conversion technology after the laboratory door is closed in an electric cage state, belonging to the field of signal transmission, and particularly relates to a magnetic switch. Background Art

[0002] Currently, in an environment with radiation hazards such as a laboratory in the field of radioactivity, lead plates are usually used to achieve the radiation protection function. According to the industry design specifications, the purity of the lead plate of the radiation-proof door should reach more than 99.994%, and the minimum thickness should not be less than 3 mm. The entire experimental environment should be fully covered with lead plates for protection to achieve 360° all-round radiation protection. Therefore, all cables connecting indoors and outdoors must be pre-buried during construction, and it is not allowed to drill holes and lay wires randomly later.

[0003] During the construction of the laboratory, a small number of spare cables are usually reserved. However, once all the corresponding cables are used, if it is necessary to temporarily add a control line between indoors and outdoors, it is very difficult. If wired communication is used, it is almost impossible to achieve because holes cannot be drilled randomly; if wireless communication is used, since lead is a conductive metal, the entire environment is in an electric cage state after the laboratory door is closed, and the electromagnetic signal is shielded, so wireless communication cannot be achieved.

[0004] Chinese Patent Application with the application number CN201010545206.4 and the application date November 16, 2010 discloses a wall-piercing large-current indoor high-voltage disconnector. It includes a wall-piercing bushing with a mountain-shaped outer surface and two conductive rods arranged inside the wall-piercing bushing. The upper end of each conductive rod is bent and arranged at the front end of the upper end cover of the wall-piercing bushing. The lower end cover is arranged at the rear end of the wall-piercing bushing. One end of the lower end cover is clamped on the outer surface of the wall-piercing bushing, and the other end is connected to the outer surfaces of the two conductive rods. The lower end cover of the present invention can well position and fix the conductive rods, and the structure of the lower end cover is simple, making full use of the structural characteristics of the outer surface of the wall-piercing bushing itself, which is fast and convenient to use, so that the present invention is very suitable for use in places where switches and wires need to pass through intervals such as walls and plates. However, the comparative document still does not solve the problem that the entire environment is in an electric cage state after the laboratory door is closed, the electromagnetic signal is shielded, and wireless communication cannot be achieved.

[0005] Disclosing the information of this background art section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0006] The object of the present invention is to overcome the problem in the prior art that after the laboratory door is closed, the entire environment is in an electrically isolated state, electromagnetic signals are shielded, and wireless communication cannot be achieved. A magnetic switch is provided that enables wireless communication even when the entire environment is in an electrically isolated state and electromagnetic signals are shielded after the laboratory door is closed.

[0007] To achieve the above object, the technical solution of the present invention is: a magnetic switch, which includes a signal transmitter, a signal receiver, and a radiation isolation lead plate;

[0008] The left side of the radiation isolation lead plate is connected to the right side of the signal receiver, and the right side of the radiation isolation lead plate is connected to the left side of the signal transmitter;

[0009] The signal transmitter includes a transmitter housing, a permanent magnet assembly, and an electromagnet assembly. An arc-shaped groove penetrating through both ends of the transmitter housing and facing upward is provided on the right side surface of the transmitter housing. A through hole penetrating through the transmitter housing is provided on the right side surface of the transmitter housing. The through hole is located below the arc-shaped groove. A fixing foot is installed at each of the four corners of the side circumference of the transmitter housing. All the fixing feet are connected to the side surface of the radiation isolation lead plate;

[0010] A permanent magnet assembly is disposed through the arc-shaped groove. A rotating shaft is disposed through the through hole. A swing rod is sequentially connected to the permanent magnet assembly and the rotating shaft from top to bottom. Two electromagnet assemblies are respectively disposed on both sides of the bottom of the inner wall of the transmitter housing. The two electromagnet assemblies are located on both sides of a swing rod. One end of the electromagnet assembly is connected to a wiring terminal through a wire. The wiring terminal is installed on the transmitter housing;

[0011] The signal receiver includes a receiver housing, a second permanent magnet assembly, and a travel switch assembly. A second arc-shaped groove penetrating through both ends of the receiver housing and facing upward is provided on the left side surface of the receiver housing. A second through hole penetrating through the receiver housing is provided on the left side surface of the receiver housing. The second through hole is located below the second arc-shaped groove. A second fixing foot is installed at each of the four corners of the side circumference of the receiver housing. All the second fixing feet are connected to the side surface of the radiation isolation lead plate;

[0012] The second permanent magnet assembly is disposed through the second arc-shaped groove. Second rotating shafts are disposed through the second through holes. Second swing rods are sequentially connected to the second permanent magnet assemblies and the second rotating shafts from top to bottom. Two travel switch assemblies are respectively disposed on both sides of the bottom of the inner wall of the receiver housing. The two travel switch assemblies are located on both sides of the second swing rods. One end of the travel switch assembly is connected to a second wiring terminal through a second wire. The second wiring terminal is installed on the receiver housing.

[0013] The permanent magnet assembly includes a magnet, a movable shaft and a second movable shaft. An installation hole is provided on the side surface of the magnet. The left side of the installation hole is connected to the right end of the movable shaft. The left end of the movable shaft passes through the left transmitter housing and is in sliding fit with an arc-shaped groove. The left end of the movable shaft is connected to a left limit disc, and the left limit disc contacts the transmitter housing.

[0014] The right side of the installation hole is connected to the left end of the second movable shaft. The right end of the second movable shaft passes through the right transmitter housing and is in sliding fit with an arc-shaped groove. The right end of the second movable shaft is connected to a right limit disc, and the right limit disc contacts the transmitter housing.

[0015] The swing rod includes a frame, a connecting rod and an iron ball. A chute is provided on the frame. The second movable shaft is in clearance fit with the chute. The bottom of the frame is connected to the top of the connecting rod. The bottom of the connecting rod is connected to the top of the iron ball. A through hole is provided at the lower end of the connecting rod. A rotating shaft passes through the through hole and extends to the outside of the transmitter housing at both ends and is connected to the second limit disc.

[0016] The electromagnet assembly includes a column, an electromagnet coil and an iron core. The electromagnet coil is installed at the top of the column. An iron core is arranged at the center of the electromagnet coil. One end of the iron core facing the iron ball is connected to an adsorbent. The bottom of the column is connected to the top of the mounting seat. The mounting seat is arranged at the inner bottom of the transmitter housing. The electromagnet coil is connected to a terminal through a wire.

[0017] The adsorbent is hemispherical, and the diameter of the adsorbent is the same as that of the iron ball.

[0018] The two permanent magnet assemblies include two magnets, three movable shafts and four movable shafts. Two installation holes are provided on the side surface of the two magnets. The right side of the two installation holes is connected to the left end of the three movable shafts. The right end of the three movable shafts passes through the right receiver housing and is in sliding fit with two arc-shaped grooves. The right end of the three movable shafts is connected to a third limit disc, and the third limit disc contacts the receiver housing.

[0019] The left side of the two installation holes is connected to the right end of the four movable shafts. The left end of the four movable shafts passes through the left receiver housing and is in sliding fit with two arc-shaped grooves. The left end of the four movable shafts is connected to a fourth limit disc, and the fourth limit disc contacts the receiver housing.

[0020] The two swing rods include two frames, two connecting rods and a guide rod. Two chutes are provided on the two frames. The four movable shafts are in clearance fit with the two chutes. The bottom of the two frames is connected to the top of the two connecting rods. The side of the bottom of the two connecting rods is connected to one end of the guide rod. Two through holes are provided at the lower ends of the two connecting rods. Two rotating shafts pass through the two through holes and extend to the outside of the receiver housing at both ends and are connected to a fifth limit disc.

[0021] The travel switch assembly includes a swing - type travel switch and a travel rod. The travel rod is arranged on the swing - type travel switch, and the swing - type travel switch is connected to two terminal blocks through two wires.

[0022] An adjusting shaft is installed on the swing - type travel switch. The travel rod is rotatably connected to the adjusting shaft, and a base is installed at the bottom of the swing - type travel switch.

[0023] The guide rod is perpendicular to the two connecting rods, and the travel rod moves back and forth along the two connecting rods.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. In a magnetic switch of the present invention, the signal transmitter includes a transmitter housing, a permanent magnet assembly and an electromagnet assembly. An arc - shaped groove penetrating through both ends of the transmitter housing upward is formed on the right side surface of the transmitter housing. A through - hole penetrating through the transmitter housing is formed on the right side surface of the transmitter housing. The through - hole is located below the arc - shaped groove. A fixing foot is installed at each of the four corners of the side circumference of the transmitter housing, and all the fixing feet are connected to the side surface of the radiation - isolating lead plate. A permanent magnet assembly is arranged through the arc - shaped groove. A rotating shaft is arranged through the through - hole. A swing rod is sequentially connected to the permanent magnet assembly and the rotating shaft from top to bottom. Two electromagnet assemblies are respectively arranged on both sides of the inner wall bottom of the transmitter housing. The two electromagnet assemblies are located on both sides of a swing rod. One end of the electromagnet assembly is connected to a terminal block through a wire, and the terminal block is installed on the transmitter housing. By using the characteristics that lead material has conductivity but no magnetic conductivity, the present invention converts an electrical signal into a magnetic signal, realizes the transmission of on - off control signals inside and outside the lead plate space with complete electromagnetic shielding, and enables the entire environment to be in an electric cage state after the laboratory door is closed for wireless communication. Therefore, this design can perform wireless communication when the laboratory is in an electric cage state.

[0026] 2. In a magnetic switch of the present invention, a swing rod includes a frame, a connecting rod and an iron ball. A sliding groove is formed on the frame. Two movable shafts are in clearance fit with the sliding groove. The bottom of the frame is connected to the top of the connecting rod. The bottom of the connecting rod is connected to the top of the iron ball. A through - hole is formed in the lower end of the connecting rod. The rotating shaft passes through the through - hole and extends to the outside of the transmitter housing at both ends and is connected to two limiting disks. The setting of a left limiting disk and a right limiting disk prevents the two movable shafts from falling off and the axial movement of the swing rod, and restricts the swing rod to swing left and right only with the through - hole as the center. Therefore, this design is simple to install and convenient to use.

[0027] 3. In a magnetic switch of the present invention, the electromagnet assembly includes a column, an electromagnet coil, and an iron core. The electromagnet coil is installed at the top of the column, and the iron core is disposed at the center of the electromagnet coil. One end of the iron core facing the iron ball is connected to an adsorbent. The bottom of the column is connected to the top of the mounting base, and the mounting base is arranged at the inner bottom of the transmitter housing. The electromagnet coil is connected to a terminal through a wire. The adsorbent is hemispherical, and the diameter of the adsorbent is the same as that of the iron ball. The cylindrical end of the iron core is inserted into the center of the electromagnet coil and fixed in a glued form. One end of the hemispherical adsorbent is aligned with the iron ball at the bottom end of a swing rod. When the electromagnet coil is energized, a suction force can be applied to the iron ball. Therefore, this design is convenient for assembly and simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the present invention.

[0029] Figure 2 is a schematic structural diagram of the transmitter housing in the present invention.

[0030] Figure 3 is a schematic structural diagram of the signal transmitter in the present invention.

[0031] Figure 4 is a side view of the signal transmitter in the present invention.

[0032] Figure 5 is a schematic structural diagram of a permanent magnet assembly in the present invention.

[0033] Figure 6 is a schematic structural diagram of a magnet in the present invention.

[0034] Figure 7 is a schematic diagram of the motion state of a swing rod in the present invention.

[0035] Figure 8 is a schematic structural diagram of the electromagnet assembly in the present invention.

[0036] Figure 9 is a schematic structural diagram of the receiver housing in the present invention.

[0037] Figure 10 is a schematic structural diagram of the signal receiver in the present invention.

[0038] Figure 11 is a side view of the signal receiver in the present invention.

[0039] Figure 12 is a schematic diagram of the motion state of the travel switch assembly in the present invention.

[0040] Figure 13 is a schematic diagram of the motion state of two swing rods in the present invention.

[0041] Figure 14 It is a schematic structural diagram of the two permanent magnet components in the present invention.

[0042] Figure 15 It is a schematic structural diagram of the guide rod in the present invention.

[0043] Figure 16 It is a schematic structural diagram of the two magnets in the present invention.

[0044] Figures 17 to 21 It is a schematic working diagram of the present invention

[0045] In the figure: signal transmitter A, transmitter housing 1, a fixed foot 2, a permanent magnet component 3, a magnet 31, a movable shaft 32, a left limit disc 321, three limit discs 32101, two movable shafts 33, a right limit disc 331, four limit discs 33101, a mounting hole 34, a swing rod 4, a frame 41, a connecting rod 42, a chute 43, an iron ball 44, a through hole 45, a rotating shaft 5, two limit discs 51, five limit discs 5101, an electromagnet component 6, a mounting seat 61, a column 62, an electromagnet coil 63, an iron core 64, an adsorbent 65, a wire 7, a terminal 8, a radiation isolation lead plate 9, an arc-shaped groove 10, a through hole 11, signal receiver B, receiver housing 101, two fixed feet 201, two permanent magnet components 301, two magnets 3101, three movable shafts 3202, four movable shafts 3303, two mounting holes 3401, two swing rods 401, two frames 4101, two connecting rods 4202, two chutes 4303, a guide rod 4404, two through holes 4505, two rotating shafts 501, a travel switch component 601, a swing arm type travel switch 6011, a base 6012, a travel rod 6013, an adjusting shaft 6014, two wires 701, two terminals 801, two arc-shaped grooves 1001, two through holes 1101. Detailed implementation manners

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0047] See Figures 1 to 21 , a magnetic switch, the magnetic switch includes a signal transmitter A, a signal receiver B and a radiation isolation lead plate 9;

[0048] The left side of the radiation isolation lead plate 9 is connected to the right side of the signal receiver B, and the right side of the radiation isolation lead plate 9 is connected to the left side of the signal transmitter A;

[0049] The signal transmitter A includes a transmitter housing 1, a permanent magnet assembly 3, and an electromagnet assembly 6. An arc-shaped groove 10 penetrating through both ends of the transmitter housing 1 and facing upward is formed on the right side of the transmitter housing 1. A through hole 11 penetrating through the transmitter housing 1 is formed on the right side of the transmitter housing 1. The through hole 11 is located below the arc-shaped groove 10. A fixing foot 2 is installed at each of the four corners of the side circumference of the transmitter housing 1, and all the fixing feet 2 are connected to the side surface of the radiation isolation lead plate 9;

[0050] A permanent magnet assembly 3 is disposed through the arc-shaped groove 10. A rotating shaft 5 is disposed through the through hole 11. A swing rod 4 is connected to the permanent magnet assembly 3 and the rotating shaft 5 in sequence from top to bottom. Two electromagnet assemblies 6 are respectively disposed on both sides of the bottom of the inner wall of the transmitter housing 1. The two electromagnet assemblies 6 are located on both sides of a swing rod 4. One end of the electromagnet assembly 6 is connected to a wiring terminal 8 through a wire 7, and a wiring terminal 8 is installed on the transmitter housing 1;

[0051] The signal receiver B includes a receiver housing 101, a second permanent magnet assembly 301, and a travel switch assembly 601. An arc-shaped groove 1001 penetrating through both ends of the receiver housing 101 and facing upward is formed on the left side of the receiver housing 101. Two through holes 1101 penetrating through the receiver housing 101 are formed on the left side of the receiver housing 101. The two through holes 1101 are located below the arc-shaped groove 1001. A second fixing foot 201 is installed at each of the four corners of the side circumference of the receiver housing 101, and all the second fixing feet 201 are connected to the side surface of the radiation isolation lead plate 9;

[0052] A second permanent magnet assembly 301 is disposed through the arc-shaped groove 1001. Two rotating shafts 501 are disposed through the two through holes 1101. Two swing rods 401 are connected to the second permanent magnet assembly 301 and the two rotating shafts 501 in sequence from top to bottom. Two travel switch assemblies 601 are respectively disposed on both sides of the bottom of the inner wall of the receiver housing 101. The two travel switch assemblies 601 are located on both sides of the two swing rods 401. One end of the travel switch assembly 601 is connected to two wiring terminals 801 through two wires 701, and two wiring terminals 801 are installed on the receiver housing 101.

[0053] The permanent magnet assembly 3 includes a magnet 31, a movable shaft 32, and two movable shafts 33. An installation hole 34 is formed on the side surface of the magnet 31. The left side of the installation hole 34 is connected to the right end of a movable shaft 32. The left end of the movable shaft 32 penetrates through the left transmitter housing 1 and is in sliding fit with the arc-shaped groove 10. The left end of the movable shaft 32 is connected to a left limit disk 321, and the left limit disk 321 contacts the transmitter housing 1;

[0054] The right side of the installation hole 34 is connected to the left end of the second movable shaft 33. The right end of the second movable shaft 33 passes through the right transmitter housing 1 and is in sliding fit with an arc-shaped groove 10. The right end of the second movable shaft 33 is connected to a right limit disk 331, and the right limit disk 331 contacts the transmitter housing 1.

[0055] The first swing rod 4 includes a frame 41, a connecting rod 42 and an iron ball 44. A chute 43 is provided on the frame 41. The second movable shaft 33 is in clearance fit with the chute 43. The bottom of the frame 41 is connected to the top of a connecting rod 42. The bottom of the connecting rod 42 is connected to the top of the iron ball 44. A through hole 45 is provided at the lower end of the connecting rod 42. A rotating shaft 5 passes through the through hole 45 and its two ends extend to the outside of the transmitter housing 1 and are connected to two limit disks 51.

[0056] The electromagnet assembly 6 includes a column 62, an electromagnet coil 63 and an iron core 64. The electromagnet coil 63 is installed at the top of the column 62. An iron core 64 is provided at the center of the electromagnet coil 63. One end of the iron core 64 facing the iron ball 44 is connected to an adsorbent 65. The bottom of the column 62 is connected to the top of a mounting base 61. The mounting base 61 is arranged at the inner bottom of the transmitter housing 1. The electromagnet coil 63 is connected to a terminal 8 through a wire 7.

[0057] The adsorbent 65 is hemispherical, and the diameter of the adsorbent 65 is the same as the diameter of the iron ball 44.

[0058] The two permanent magnet assemblies 301 include two magnets 3101, a third movable shaft 3202 and a fourth movable shaft 3303. Two mounting holes 3401 are provided on the side of the two magnets 301. The right side of the two mounting holes 3401 is connected to the left end of the third movable shaft 3202. The right end of the third movable shaft 3202 passes through the right receiver housing 101 and is in sliding fit with two arc-shaped grooves 1001. The right end of the third movable shaft 3202 is connected to a third limit disk 32101, and the third limit disk 32101 contacts the receiver housing 101;

[0059] The left side of the two mounting holes 3401 is connected to the right end of the fourth movable shaft 3303. The left end of the fourth movable shaft 3303 passes through the left receiver housing 101 and is in sliding fit with two arc-shaped grooves 1001. The left end of the fourth movable shaft 3303 is connected to a fourth limit disk 33101, and the fourth limit disk 33101 contacts the receiver housing 101.

[0060] The two rocker arms 401 include two frames 4101, two connecting rods 4202 and a guide rod 4404. The two frames 4101 are provided with two slide grooves 4303. The four movable shafts 3303 are clearance-matched with the two slide grooves 4303. The bottom of the two frames 4101 is connected to the top of the two connecting rods 4202. The bottom side of the two connecting rods 4202 is connected to one end of the guide rod 4404. The lower ends of the two connecting rods 4202 are provided with two through holes 4505. The two ends of the two rotating shafts 501 after passing through the two through holes 4505 extend to the outside of the receiver housing 101 and are connected to the five limit plates 5101.

[0061] The travel switch assembly 601 includes a swing arm travel switch 6011 and a travel rod 6013 . The swing arm travel switch 6011 is provided with a travel rod 6013 . The swing arm travel switch 6011 is connected to two terminals 801 via two wires 701 .

[0062] An adjusting shaft 6014 is installed on the swing arm type travel switch 6011 , the travel rod 6013 is rotatably connected to the adjusting shaft 6014 , and a base 6012 is installed at the bottom of the swing arm type travel switch 6011 .

[0063] The guide rod 4404 is vertically arranged with respect to the two connecting rods 402 , and the travel rod 6013 moves forward and backward along the two connecting rods 402 .

[0064] The principle of the present invention is described as follows: the radiation isolation lead plate 9 is equivalent to the door of the laboratory. First, the signal transmitter A is set outside the laboratory door, and the signal receiver B is set inside the laboratory door. The signal transmitter A and the signal receiver B are aligned and installed across the radiation isolation lead plate 9. The opposite sides of the first magnet 31 and the second magnet 3101 are the same pole (the S pole in the figure); then the terminal 8 on the left side of the signal transmitter A is energized, and the electromagnet coil 63 on the left side is energized. The magnetic force of the iron core 64 on the left side attracts the iron ball 44 at the bottom end of the pendulum 4 to move, and a connecting rod 42 swings, pushing a frame 41 to move rightward as a whole. At this time, the position of the pendulum 4 is as shown in FIG. Figure 17 As shown; when the permanent magnet assembly 3 of the signal transmitter A moves, since magnetic forces of the same polarity repel each other, and the lead element is a non-magnetic material, it will not weaken the magnetic lines of force. Therefore, the two permanent magnet assemblies 301 of the signal receiver B move upward due to the repulsive force in the oblique upward direction. At this time, the movement positions of the permanent magnet assembly 3 and the two permanent magnet assemblies 301 are as shown in FIG. Figure 18As shown; when the two permanent magnet components 301 of the signal receiver B are pushed to the uppermost end by the repulsive force, they are restricted by the two arc-shaped grooves 1001 and no longer move. Then the one permanent magnet component 3 of the signal transmitter A moves to the uppermost end. At this time, the one magnet 31 and the two magnets 3101 are opposite to each other, and the repulsive force no longer provides an upward component. Since the two ends of the two arc-shaped grooves 1001 are higher than the middle, the two permanent magnet components 301 of the signal receiver B begin to slide downward under the influence of gravity. Under the action of the two magnets 3101, the mechanical movement is converted into a magnetic signal. At this time, the movement positions of the one permanent magnet component 3 and the two permanent magnet components 301 are as shown in FIG. Figure 19 As shown; after the two permanent magnet components 301 of the signal receiver B slide down and stagger with the one permanent magnet component 3 of the signal transmitter A, the repulsive force begins to push the two permanent magnet components 301 in the oblique downward direction until they reach the bottom. At this time, the device state is in a stable state and no longer moves. At this time, the movement positions of the one permanent magnet component 3 and the two permanent magnet components 301 are as shown in Figure 20 As shown; finally, when the two permanent magnet components 301 of the signal receiver B move to the leftmost end of the two arc-shaped slots 1001, the two connecting rods 4202 are driven to swing with the two through holes 4505 as the center of the circle, and the guide rod 4404 toggles the swing arm type travel switch 6011 on the right side of the signal receiver B. The magnetic signal is converted into an electrical signal by the travel switch component 601, and the signal state of the travel switch component 601 changes from open to closed. At this time, the movement position of the two permanent magnet components 301 is as shown in FIG. Figure 21 As shown, the electrical signal is transmitted to the control unit through two wires 701 and two terminals 801 to control the opening and closing movement of the laboratory door, that is, the radiation isolation lead plate 9;

[0065] When the electromagnetic coil 63 on the left side of the signal transmitter A is powered off and the electromagnetic coil 63 on the right side is powered on, the opposite action will occur, and finally the swing arm type travel switch 6011 on the right side of the signal receiver B will be restored to the disconnected state, and the signal state of the swing arm type travel switch 6011 on the left side will be changed from disconnected to closed;

[0066] To sum up, the external switch signal that needs to be input is converted into a live signal, which is defined as follows:

[0067] Input signal value is 1: the electromagnetic coil 63 on the left side of the signal transmitter A is energized, and the electromagnetic coil 63 on the right side is not energized; at this time, the swing arm travel switch 6011 on the left side of the signal receiver B is closed, and the swing arm travel switch 6011 on the right side is open;

[0068] The input signal value is 0: the electromagnet coil 63 on the right side of the signal transmitter A is energized, and the electromagnet coil 63 on the left side is not energized; at this time, the swing arm type travel switch 6011 signal on the right side of the receiver is closed, and the swing arm type travel switch 6011 signal on the left side is open.

[0069] Embodiment 1:

[0070] A magnetic switch, the magnetic switch comprising a signal transmitter A, a signal receiver B and a radiation isolation lead plate 9; the left side of the radiation isolation lead plate 9 is connected to the right side of the signal receiver B, and the right side of the radiation isolation lead plate 9 is connected to the left side of the signal transmitter A; the signal transmitter A includes a transmitter housing 1, a permanent magnet assembly 3 and an electromagnet assembly 6. An arc-shaped groove 10 is formed on the right side surface of the transmitter housing 1 and penetrates through both ends of the transmitter housing 1 and faces upward. A through hole 11 is formed on the right side surface of the transmitter housing 1 and penetrates through the transmitter housing 1. The through hole 11 is located below the arc-shaped groove 10. Fixing feet 2 are installed at the four corners of the side circumference of the transmitter housing 1, and all the fixing feet 2 are connected to the side surface of the radiation isolation lead plate 9; a permanent magnet assembly 3 is disposed through the arc-shaped groove 10, a rotating shaft 5 is disposed through the through hole 11, and a swing rod 4 is sequentially connected to the permanent magnet assembly 3 and the rotating shaft 5 from top to bottom. Two electromagnet assemblies 6 are respectively disposed on both sides of the bottom of the inner wall of the transmitter housing 1. The two electromagnet assemblies 6 are located on both sides of a swing rod 4. One end of the electromagnet assembly 6 is connected to a wiring terminal 8 through a wire 7, and the wiring terminal 8 is installed on the transmitter housing 1; the signal receiver B includes a receiver housing 101, a second permanent magnet assembly 301 and a travel switch assembly 601. Two arc-shaped grooves 1001 are formed on the left side surface of the receiver housing 101 and penetrate through both ends of the receiver housing 101 and face upward. Two through holes 1101 are formed on the left side surface of the receiver housing 101 and penetrate through the receiver housing 101. The two through holes 1101 are located below the two arc-shaped grooves 1001. Fixing feet 201 are installed at the four corners of the side circumference of the receiver housing 101, and all the fixing feet 201 are connected to the side surface of the radiation isolation lead plate 9; a second permanent magnet assembly 301 is disposed through the two arc-shaped grooves 1001, two rotating shafts 501 are disposed through the two through holes 1101, and two swing rods 401 are sequentially connected to the second permanent magnet assembly 301 and the two rotating shafts 501 from top to bottom. Two travel switch assemblies 601 are respectively disposed on both sides of the bottom of the inner wall of the receiver housing 101. The two travel switch assemblies 601 are located on both sides of the two swing rods 401. One end of the travel switch assembly 601 is connected to two wiring terminals 801 through two wires 701, and the two wiring terminals 801 are installed on the receiver housing 101.

[0071] During application: The radiation isolation lead plate 9 is equivalent to the door of a laboratory. First, the signal transmitter A is arranged outside the laboratory door, and the signal receiver B is arranged inside the laboratory door. The signal transmitter A and the signal receiver B are aligned and installed with the radiation isolation lead plate 9 in between. The opposite sides of the permanent magnet assembly 3 and the second permanent magnet assembly 301 are of the same pole;

[0072] Then, a terminal 8 on the left side of the signal transmitter A is energized, and at this time, the electromagnet assembly 6 on the left side is energized, and a pendulum 4 on the left side swings to the right; when a permanent magnet assembly 3 of the signal transmitter A moves, since magnetic forces of the same charge repel each other, and the lead element is a non-magnetic material and will not weaken the magnetic lines of force, the two permanent magnet assemblies 301 of the signal receiver B are moved upward by the repulsive force in the oblique upward direction; when the two permanent magnet assemblies 301 of the signal receiver B are pushed to the uppermost end by the repulsive force, they are restricted by the two arc-shaped grooves 1001 and no longer move, and then the permanent magnet assembly 3 of the signal transmitter A moves to the uppermost end, and the repulsive force no longer provides an upward component force, and since the two ends of the two arc-shaped grooves 1001 are higher than the middle, the two permanent magnet assemblies 301 of the signal receiver B begin to slide downward under the influence of gravity, and at this time, the two permanent magnet assemblies 3 01, the mechanical motion is converted into a magnetic signal; after the two permanent magnet components 301 of the signal receiver B slide down and are offset from the one permanent magnet component 3 of the signal transmitter A, the repulsive force begins to push the two permanent magnet components 301 in the oblique downward direction until they reach the bottom, at which time the device is in a stable state and no longer moves; finally, when the two permanent magnet components 301 of the signal receiver B move to the leftmost end of the two arc-shaped slots 1001, the two swing rods 401 are driven to swing, and the two swing rods 401 toggle the travel switch components 601 on the right side of the signal receiver B, and the magnetic signal is converted into an electrical signal through the travel switch components 601, and the signal state of the travel switch components 601 changes from open to closed, and the electrical signal is transmitted to the control unit through the two wires 701 and the two terminals 801 to control the opening and closing movement of the laboratory door, that is, the radiation isolation lead plate 9.

[0073] Embodiment 2:

[0074] Embodiment 2 is substantially the same as Embodiment 1, except that:

[0075] A magnetic switch, wherein the permanent magnet assembly 3 includes a magnet 31, a movable shaft 32 and two movable shafts 33. An installation hole 34 is provided on the side surface of the magnet 31. The left side of the installation hole 34 is connected to the right end of the movable shaft 32. The left end of the movable shaft 32 passes through the left transmitter housing 1 and is in sliding fit with an arc-shaped groove 10. The left end of the movable shaft 32 is connected to a left limit disk 321, and the left limit disk 321 contacts the transmitter housing 1. The right side of the installation hole 34 is connected to the left end of the two movable shafts 33. The right ends of the two movable shafts 33 pass through the right transmitter housing 1 and are in sliding fit with an arc-shaped groove 10. The right ends of the two movable shafts 33 are connected to a right limit disk 331, and the right limit disk 331 contacts the transmitter housing 1. The swing rod 4 includes a frame 41, a connecting rod 42 and an iron ball 44. A chute 43 is provided on the frame 41. The two movable shafts 33 are in clearance fit with the chute 43. The bottom of the frame 41 is connected to the top of the connecting rod 42. The bottom of the connecting rod 42 is connected to the top of the iron ball 44. A through hole 45 is provided at the lower end of the connecting rod 42. A rotating shaft 5 passes through the through hole 45 and extends to the outside of the transmitter housing 1 at both ends and is connected to two limit disks 51.

[0076] During application: A movable shaft 32 in the permanent magnet assembly 3 passes through an arc-shaped groove 10 of the transmitter housing 1. The two movable shafts 33 pass through a swing rod 4 and then pass through an arc-shaped groove 10 of the transmitter housing 1. The movable shaft 32 and the two movable shafts 33 are fixed at the centers on both sides of the magnet 31 by an adhesive method. The diameters of the movable shaft 32 and the two movable shafts 33 are slightly smaller than the width of the arc-shaped groove 10. Therefore, the permanent magnet assembly 3 can move freely within the range of the arc-shaped groove 10. The settings of the left limit disk 321 and the right limit disk 331 prevent the movable shaft 32 and the two movable shafts 33 from falling off and the swing rod 4 from axially moving, restricting the swing rod 4 to swing left and right only with the through hole 45 as the center.

[0077] Embodiment 3:

[0078] Embodiment 3 is basically the same as Embodiment 1, and the difference lies in:

[0079] A magnetic switch, wherein the electromagnet assembly 6 includes a column 62, an electromagnet coil 63 and an iron core 64. The electromagnet coil 63 is installed at the top of the column 62. An iron core 64 is arranged at the center of the electromagnet coil 63. One end of the iron core 64 close to the iron ball 44 is connected to an adsorbent 65. The bottom of the column 62 is connected to the top of the mounting seat 61. The mounting seat 61 is arranged at the inner bottom of the transmitter housing 1. The electromagnet coil 63 is connected to a terminal 8 through a wire 7. The adsorbent 65 is hemispherical, and the diameter of the adsorbent 65 is the same as the diameter of the iron ball 44.

[0080] During application: The iron core 64 and the adsorbent 65 in the electromagnet assembly 6 are integrally made of pure electrolytic iron with good magnetic conductivity. The cylindrical end of the iron core 64 is inserted into the center of the electromagnet coil 63 and fixed in a glued form. One end of the hemispherical adsorbent 65 is aligned with the iron ball 44 at the bottom of a swing rod 4. When the electromagnet coil 6 is energized, a suction force can be applied to the iron ball 44.

[0081] Embodiment 4:

[0082] Embodiment 4 is basically the same as Embodiment 1, and the difference lies in:

[0083] A magnetic switch, wherein the travel switch assembly 601 includes a swing-arm type travel switch 6011 and a travel rod 6013. The travel rod 6013 is arranged on the swing-arm type travel switch 6011. The swing-arm type travel switch 6011 is connected to two connection terminals 801 through two wires 701. An adjustment shaft 6014 is installed on the swing-arm type travel switch 6011. The travel rod 6013 is rotatably connected to the adjustment shaft 6014. A base 6012 is installed at the bottom of the swing-arm type travel switch 6011. The guide rod 4404 is perpendicular to the two connecting rods 402. The travel rod 6013 moves back and forth along the two connecting rods 402.

[0084] During application: In the shielding room, the two connection terminals 801 are connected through a circuit. By judging the signals output by the two travel switch assemblies 601 on the left and right of the signal receiver B, a switch quantity signal input from the outside can be obtained.

[0085] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modification or change made by those of ordinary skill in the art according to the content disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A magnetic switch, characterized in that : The magnetic switch includes a signal transmitter (A), a signal receiver (B), and a radiation isolation lead plate (9); The left side of the radiation isolation lead plate (9) is connected to the right side of the signal receiver (B), and the right side of the radiation isolation lead plate (9) is connected to the left side of the signal transmitter (A); The signal transmitter (A) includes a transmitter housing (1), a permanent magnet assembly (3), and an electromagnet assembly (6). An arc-shaped groove (10) penetrating through both ends of the transmitter housing (1) and facing upward is formed on the right side surface of the transmitter housing (1). A through hole (11) penetrating through the transmitter housing (1) is formed on the right side surface of the transmitter housing (1). The through hole (11) is located below the arc-shaped groove (10). Fixing feet (2) are installed at the four corners of the side circumference of the transmitter housing (1), and all the fixing feet (2) are connected to the side surface of the radiation isolation lead plate (9); A permanent magnet assembly (3) is disposed through the arc-shaped groove (10). A rotating shaft (5) is disposed through the through hole (11). A swing rod (4) is sequentially connected to the permanent magnet assembly (3) and the rotating shaft (5) from top to bottom. Two electromagnet assemblies (6) are respectively disposed on both sides of the bottom of the inner wall of the transmitter housing (1). The two electromagnet assemblies (6) are located on both sides of a swing rod (4). One end of the electromagnet assembly (6) is connected to a wiring terminal (8) through a wire (7), and the wiring terminal (8) is installed on the transmitter housing (1); The signal receiver (B) includes a receiver housing (101), a permanent magnet assembly (301), and a travel switch assembly (601). An arc-shaped groove (1001) penetrating through both ends of the receiver housing (101) and facing upward is formed on the left side surface of the receiver housing (101). Through holes (1101) penetrating through the receiver housing (101) are formed on the left side surface of the receiver housing (101). The through holes (1101) are located below the arc-shaped groove (1001). Fixing feet (201) are installed at the four corners of the side circumference of the receiver housing (101), and all the fixing feet (201) are connected to the side surface of the radiation isolation lead plate (9); A permanent magnet assembly (301) is disposed through the arc-shaped groove (1001). Rotating shafts (501) are disposed through the through holes (1101). Swing rods (401) are sequentially connected to the permanent magnet assemblies (301) and the rotating shafts (501) from top to bottom. Two travel switch assemblies (601) are respectively disposed on both sides of the bottom of the inner wall of the receiver housing (101). The two travel switch assemblies (601) are located on both sides of a swing rod (401). One end of the travel switch assembly (601) is connected to a wiring terminal (801) through wires (701), and the wiring terminals (801) are installed on the receiver housing (101).

2. The magnetic switch according to claim 1, characterized in that: The permanent magnet assembly (3) includes a magnet (31), a movable shaft (32) and two movable shafts (33). An installation hole (34) is formed in the side surface of the magnet (31). The left side of the installation hole (34) is connected to the right end of a movable shaft (32). The left end of the movable shaft (32) passes through the left transmitter housing (1) and is in sliding fit with an arc-shaped groove (10). The left end of the movable shaft (32) is connected to a left limiting disc (321), and the left limiting disc (321) contacts the transmitter housing (1). The right side of the installation hole (34) is connected to the left ends of the two movable shafts (33). The right ends of the two movable shafts (33) pass through the right transmitter housing (1) and are in sliding fit with an arc-shaped groove (10). The right ends of the two movable shafts (33) are connected to a right limiting disc (331), and the right limiting disc (331) contacts the transmitter housing (1).

3. The magnetic switch according to claim 2, characterized in that: The swing rod (4) includes a frame (41), a connecting rod (42) and an iron ball (44). A chute (43) is formed in the frame (41). The two movable shafts (33) are in clearance fit with the chute (43). The bottom of the frame (41) is connected to the top of a connecting rod (42). The bottom of the connecting rod (42) is connected to the top of the iron ball (44). A through hole (45) is formed at the lower end of the connecting rod (42). A rotating shaft (5) passes through the through hole (45) and its two ends extend to the outside of the transmitter housing (1) and are connected to two limiting discs (51).

4. A magnetic switch according to claim 3, characterized in that: The electromagnet assembly (6) includes a column (62), an electromagnet coil (63) and an iron core (64). The electromagnet coil (63) is installed at the top of the column (62). An iron core (64) is arranged at the center of the electromagnet coil (63). One end of the iron core (64) facing the iron ball (44) is connected to an adsorbent (65). The bottom of the column (62) is connected to the top of a mounting seat (61). The mounting seat (61) is arranged at the inner bottom of the transmitter housing (1). The electromagnet coil (63) is connected to a terminal (8) through a wire (7).

5. A magnetic switch according to claim 4, characterized in that: The adsorbent (65) is hemispherical, and the diameter of the adsorbent (65) is the same as the diameter of the iron ball (44).

6. A magnetic switch according to claim 1, wherein: The two permanent magnet assemblies (301) include two magnets (3101), three movable shafts (3202) and four movable shafts (3303). Two installation holes (3401) are formed in the side surfaces of the two magnets (3101). The right sides of the two installation holes (3401) are connected to the left ends of the three movable shafts (3202). The right ends of the three movable shafts (3202) pass through the right receiver housing (101) and are in sliding fit with two arc-shaped grooves (1001). The right ends of the three movable shafts (3202) are connected to three limiting discs (32101), and the three limiting discs (32101) contact the receiver housing (101). The left side of the two mounting holes (3401) is connected to the right end of the four movable shafts (3303). The left end of the four movable shafts (3303) passes through the left receiver housing (101) and is in sliding fit with the two arc-shaped grooves (1001). The left end of the four movable shafts (3303) is connected to the four limit disks (33101), and the four limit disks (33101) are in contact with the receiver housing (101).

7. A magnetic switch according to claim 6, characterized in that: The two swing rods (401) include two frames (4101), two connecting rods (4202) and a guide rod (4404). Two sliding grooves (4303) are formed in the two frames (4101). The four movable shafts (3303) are in clearance fit with the two sliding grooves (4303). The bottom of the two frames (4101) is connected to the top of the two connecting rods (4202). The bottom side of the two connecting rods (4202) is connected to one end of the guide rod (4404). Two through holes (4505) are formed at the lower ends of the two connecting rods (4202). The two rotating shafts (501) pass through the two through holes (4505) and extend to the outside of the receiver housing (101) at both ends and are connected to the five limit disks (5101).

8. A magnetic switch according to claim 7, characterized in that: The travel switch assembly (601) includes a swing-arm type travel switch (6011) and a travel rod (6013). The travel rod (6013) is arranged on the swing-arm type travel switch (6011). The swing-arm type travel switch (6011) is connected to the two terminal posts (801) through two wires (701).

9. The magnetic switch according to claim 8, wherein: An adjusting shaft (6014) is installed on the swing-arm type travel switch (6011). The travel rod (6013) is rotatably connected to the adjusting shaft (6014). A base (6012) is installed at the bottom of the swing-arm type travel switch (6011).

10. The magnetic switch according to any one of claims 8 or 9, characterized in that: The guide rod (4404) is perpendicular to the two connecting rods (4202). The two connecting rods (4202) move back and forth between the two travel rods (6013).

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