CN210048744U

CN210048744U - Magnetic rack

Info

Publication number: CN210048744U
Application number: CN201920608942.6U
Authority: CN
Inventors: 许泽辉; 崖娇练; 蔡鹏飞; 代元平; 罗世强
Original assignee: Liuzhou Maternity and Child Healthcare Hospital
Current assignee: Liuzhou Maternity and Child Healthcare Hospital
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-02-11
Anticipated expiration: 2029-04-29

Abstract

The utility model belongs to the technical field of nucleic acid purification, concretely relates to magnetic rack, including two vertical side plates, roof and bottom plate, vertical side plate is flexible structure, flexible direction is along its vertical direction, two vertical side plates are parallel and just right, and respective bottom lies in the coplanar, all is provided with U type slide rail on both sides in opposite directions, roof and bottom plate just right set up in the U type inboard of U type slide rail, and upper and lower interval is placed, the roof lies in the bottom plate directly over, and its slidable mounting is on the vertical side plate; the movable plate is arranged on the U-shaped sliding rail, slides to the position right below the bottom plate or right above the top plate along the U-shaped sliding rail, is of a cubic structure and consists of a magnet plate and a first magnetic isolation layer. The utility model discloses enlarged the application scope of magnetic frame, be convenient for simultaneously control magnetic field whether and the effect that goes on in batches when realizing the washing to the effect of magnetic bead as required.

Description

Magnetic rack

[ technical field ] A method for producing a semiconductor device

The utility model relates to a nucleic acid purification technical field, concretely relates to magnetic frame.

[ background of the invention ]

The bead method is to crack the sample by the lysis solution, the nucleic acid molecules dissociated from the sample are specifically adsorbed to the surface of the magnetic beads to form a magnetic bead-DNA polymer, and impurities such as protein and the like are not adsorbed and remain in the solution. After reacting for a certain time, separating the magnetic bead-DNA polymer from the liquid under the action of a magnetic field, recovering the magnetic bead-DNA polymer, and washing with a washing solution to obtain pure DNA. The magnetic bead method does not need centrifugation, does not need addition of various reagents, is simple to operate, meets the requirement of automatic extraction of nucleic acid, and is an important direction for development of future nucleic acid purification methods. The biomagnetic separation technology needs a magnetic frame, and the magnetic frame in the prior art has the following problems: the magnet block and the support bracket are mostly fixed integrally, although the magnetic bead-DNA polymer can be rapidly gathered, in the washing step, due to the magnetic field action of the magnet, the magnetic bead-DNA polymer is difficult to disperse, the reaction tube on the magnetic frame needs to be taken down singly and shaken to enable the magnetic bead-DNA polymer to obtain the washing liquid, which is very inconvenient, for this reason, a small amount of magnets disclosed in the prior art are detachably arranged on the support bracket and are arranged on or taken down from the support bracket according to needs, but the operation is also inconvenient; in addition, the magnetic rack in the prior art is difficult to be applied to reaction tubes with different specifications, and the applicability needs to be improved.

[ Utility model ] content

The utility model aims to provide a: to the problem that above-mentioned exists, provide a magnetic force frame, this utility model has enlarged the application scope of magnetic force frame, is convenient for simultaneously control magnetic field whether and realize the effect of going on in batches when washing to the effect of magnetic bead as required.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a magnetic rack comprises two vertical side plates, a top plate and a bottom plate, wherein the vertical side plates are of telescopic structures, the telescopic direction is along the vertical direction of the vertical side plates, the two vertical side plates are parallel and opposite to each other, the bottoms of the vertical side plates are positioned on the same plane, U-shaped slide rails are arranged on the opposite side faces of the vertical side plates, the U-shaped side edges of the two U-shaped slide rails are opposite to each other and horizontally arranged, the top plate is provided with a plurality of through holes for communicating the top surface and the bottom surface, the top plate and the bottom plate are opposite to each other and arranged on the inner sides of the U-shaped slide rails and are arranged at intervals up and down, the top plate is positioned right above the bottom plate and is slidably mounted on the vertical side plates through a; install the movable plate on the U type slide rail, the both ends of movable plate are respectively through slider and two U type slide rail sliding connection, the movable plate along U type slide rail slides extremely under the bottom plate or directly over the roof, the movable plate is the cube structure, and it comprises magnet board and first magnetism isolating layer, the bottom surface of magnet board sets up first magnetism isolating layer, the movable plate moves extremely under the bottom plate or when directly over the roof, the movable plate with through-hole on the roof all has the part of mutual alignment in vertical direction, first magnetism isolating layer is located the below of magnet board.

Preferably, the bottom plate, the top plate and the vertical side plates are all made of non-magnetic materials.

Preferably, the top surface of the bottom plate is provided with a plurality of grooves, and the grooves are aligned with the through holes in the top plate in the vertical direction one by one.

Preferably, the sliding limiting structure comprises a bar-shaped through hole, a telescopic rod and a sliding guide rod, the bar-shaped through holes are respectively formed in the vertical side plate along the vertical direction, the two bar-shaped through holes are the same in length and are located at the same height of the vertical side plate and are located between two ends of the U-shaped slide rail, the telescopic rod is accommodated in the bar-shaped through holes, the length direction of the telescopic rod is parallel to the length direction of the bar-shaped through holes, one end of the telescopic rod is connected with the side wall at the lower end of the bar-shaped through hole, the other end of the telescopic rod is connected with the sliding guide rod, the sliding guide rod is horizontally arranged, one end of the sliding guide rod is connected with the top plate, the other end of the sliding guide rod is.

Preferably, an anti-slip structure is arranged on a vertical side face, facing the direction opposite to the direction of the opening of the U-shaped sliding rail, of the bottom plate, the anti-slip structure comprises a rotating shaft and an anti-slip rod, one end of the rotating shaft is perpendicularly and rotatably connected with the vertical side face of the bottom plate, the rotating axis of the rotating shaft is perpendicular to the plane of the rotating shaft, the other end of the rotating shaft is perpendicularly and fixedly connected with the anti-slip rod, one end, far away from the rotating shaft, of the anti-slip rod rotates to the position above or below the bottom surface of the bottom plate along with the rotation of the rotating shaft, and when the anti-slip rod rotates to the position below the bottom surface of the bottom plate, the length of the anti-.

Preferably, when the moving plate is located right below the bottom plate, the top surface of the moving plate is attached to the bottom surface of the bottom plate.

Preferably, the moving plate is externally coated with a plastic shell.

Preferably, the moving plate and the U-shaped slide rail are provided with a second magnetism isolating layer on the vertical side face facing the same direction.

Preferably, the first magnetism isolating layer and the second magnetism isolating layer are both made of copper foil.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:

the utility model discloses a sliding connection of roof and vertical curb plate, the setting of U type slide rail and movable plate have enlarged the application scope of magnetic frame, are convenient for control magnetic field whether to the effect of magnetic bead and the effect of going on in batches when realizing washing as required simultaneously, specifically, during the use, can adjust the distance between roof and the bottom plate according to the length of the reaction tube that uses, therefore, the sliding connection of roof and vertical curb plate has enlarged application scope; during the experiment, the magnetic beads are added into the reaction tube filled with the lysis solution, the reaction tube is placed on the magnetic frame, the movable plate slides to the position right below the bottom plate to enable the magnetic beads-DNA in the reaction tube to be rapidly gathered and separated from the liquid, after the liquid is absorbed, the movable plate slides to the position above the top plate to remove the attraction effect of the magnetic field generated by the magnet on the magnetic beads-DNA so as to be convenient for washing, meanwhile, the vertical side plate is contracted to the position that the bottom of the movable plate is attached to the top of the reaction tube to fix the reaction tube on the magnetic frame, so that the reaction tube on the whole magnetic frame can be shaken to enable the magnetic beads-DNA to be dispersed to obtain sufficient washing liquid, and therefore, the arrangement of the U-shaped slide rail and the movable plate can be convenient for controlling the effect of the magnetic field on the magnetic beads according to requirements and realizing the batch washing effect.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

Fig. 2 is a schematic sectional view of fig. 1 taken in a direction parallel to the vertical side plate.

Fig. 3 is an appearance schematic diagram of a side face of the vertical side plate, which is arranged opposite to the U-shaped sliding rail.

Fig. 4 is an enlarged schematic view of a in fig. 1.

Fig. 5 is an enlarged schematic view of a in fig. 1.

It is mainly the description of the element symbol:

in the drawings: the magnetic separation device comprises 1-vertical side plates, 11-U-shaped sliding rails, 2-top plates, 21-through holes, 3-bottom plates, 4-sliding limiting structures, 41-strip-shaped through holes, 42-telescopic rods, 43-sliding guide rods, 5-moving plates, 51-magnet plates, 52-first magnetic separation layers, 6-anti-skidding structures, 61-rotating shafts, 62-anti-skidding rods and 7-second magnetic separation layers.

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The drawings are only for purposes of illustration and are not intended to be limiting, and certain elements of the drawings may be omitted, enlarged or reduced to illustrate certain embodiments of the present invention, and are not intended to represent the actual dimensions of the product.

In the description of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-5, in a preferred embodiment of the present invention, a magnetic rack comprises two vertical side plates 1, a top plate 2 and a bottom plate 3, wherein the two vertical side plates 1 are parallel and opposite to each other, the bottom of each vertical side plate is located on the same plane, the two opposite sides of the two vertical side plates are respectively provided with a U-shaped slide rail 11, the U-shaped sides of the two U-shaped slide rails 11 are opposite to each other and horizontally placed, the top plate 2 is provided with a plurality of through holes 21 communicating the top surface and the bottom surface, the through holes 21 are used for accommodating reaction tubes, the top plate 2 and the bottom plate 3 are opposite to and arranged on the U-shaped inner side of the U-shaped slide rails 11 and are vertically spaced, the top plate 2 is located right above the bottom plate 3 and slidably mounted on the vertical side plates 1 through a sliding limiting structure 4, the sliding direction is parallel to the vertical direction of the vertical side plates 1, the top plate 2 slides away from or, during the use, through adjusting roof 2 with the distance between the bottom plate 3 will roof 2 is adjusted to suitable height after, through sliding limit structure 4 fixes to be applicable to the reaction tube of different length, make application scope obtain expanding.

Further, the sliding limiting structure 4 includes a bar-shaped through hole 41, a telescopic rod 42 and a sliding guide rod 43, the bar-shaped through holes 41 are respectively formed in the vertical side plate 1 along the vertical direction, the two bar-shaped through holes 41 have the same length and are located at the same height of the vertical side plate 1 and are both located between two ends of the U-shaped slide rail 11, the telescopic rod 42 is accommodated in the bar-shaped through hole 41, the length direction of the telescopic rod is parallel to the length direction of the bar-shaped through hole 41, one end of the telescopic rod is connected to the side wall at the lower end of the bar-shaped through hole 41, the other end of the telescopic rod is connected to the sliding guide rod 43, the sliding guide rod 43 is horizontally arranged, one end of the telescopic rod is connected to the top plate 2, the other end of the telescopic rod is located on the outer side. When the height of the top plate 2 needs to be adjusted, the telescopic rod 42 is stretched, the sliding guide rod 43 slides relative to the strip-shaped through hole 41 along with the stretching of the telescopic rod 42, so that the top plate 2 is driven to be close to or far away from the bottom plate 3, and after the top plate 2 is adjusted to a proper height, the stretching of the telescopic rod 42 is stopped, and the sliding limiting effect on the top plate 2 can be achieved.

The vertical side plate 1 is of a telescopic structure, and the telescopic direction is along the vertical direction. The movable plate is characterized in that a movable plate 5 is mounted on the U-shaped slide rails 11, two ends of the movable plate 5 are respectively connected with the two U-shaped slide rails 11 in a sliding mode through sliders (not shown), the movable plate 5 slides to the position under the bottom plate 3 or the position over the top plate 2 along the U-shaped slide rails 11, when the movable plate 5 is located under the bottom plate 3 or the position over the top plate 2, the two sliders and the movable plate 5 are the same in distance parallel to the opening of the U-shaped slide rails 11 towards the side face in the direction of the movable plate, and the distance does not influence the sliding of the movable plate on the U-shaped slide rails 11. The moving plate 5 is a cubic structure and is composed of a magnet plate 51 and a first magnetism isolating layer 52, the first magnetism isolating layer 52 is arranged on the bottom surface of the magnet plate 51, when the moving plate 5 moves to the position right below the bottom plate 3 or the position right above the top plate 2, the through holes 21 on the moving plate 5 and the top plate 2 are provided with mutually aligned parts in the vertical direction, so that the effect of magnetic attraction on magnetic substances in each reaction tube on a magnetic frame is realized when the moving plate 5 is positioned right below the bottom plate 3, and meanwhile, when the moving plate is positioned right above the top plate 2, the reaction tubes on the magnetic frame can be effectively prevented from being separated from the magnetic frame when the magnetic frame is shaken upside down in a washing step. When the moving plate 5 moves to the position right below the bottom plate 3 or right above the top plate 2, the first magnetism isolating layer 52 is located below the magnet plate 51, and when the moving plate 5 slides to the position right above the top plate 2, the magnetic field generated by the moving plate 5 can be shielded from attracting magnetic beads-DNA in the reaction tube due to the action of the first magnetism isolating layer 52. Preferably, the first magnetism isolating layer 52 is made of copper foil. The utility model discloses in, the flexible of vertical curb plate 1 does not influence movable plate 5 top shoe with the mating reaction of U type slide rail 11. Further, the bottom plate 3, the top plate 2 and the vertical side plates 1 are made of a non-magnetic material, such as hard plastic, aluminum, etc., so as to prevent the non-magnetic material from attracting the moving plate 5, which may hinder the sliding of the moving plate 5.

When a DNA extraction and purification experiment is carried out, after a sample in a reaction tube is cracked, magnetic beads are added into a cracking solution, the magnetic beads are selectively combined with optimized DNA to form magnetic bead-DNA, the reaction tube is placed on a magnetic frame, the moving plate 5 slides along the U-shaped slide rail 11 to the position under the bottom plate 3, the magnetic bead-DNA is rapidly gathered under the action of a magnetic field generated by the moving plate 5 and is separated from other substances in the cracking solution, furthermore, a plurality of grooves are formed in the top surface of the bottom plate 3, the grooves are aligned with the through holes 21 in the top plate 2 in the vertical direction one by one, the thickness of the reaction tube supporting part of the bottom plate 3 is reduced, the attraction force of the magnetic particles in the reaction tube 5 and the reaction tube is increased, the gathering of the magnetic particle moving plate is accelerated, and the bottom end of the reaction tube has a fixing effect. Further, when the moving plate 5 is located right below the bottom plate 3, the top surface of the moving plate is attached to the bottom surface of the bottom plate 3, so that the attraction force between the moving plate 5 and the magnetic particles in the reaction tube is increased, and the aggregation of the magnetic particles is accelerated.

Further, an anti-slip structure 6 is arranged on a vertical side surface of the bottom plate 3 facing the direction opposite to the opening direction of the U-shaped slide rail 11, the anti-slip structure 6 includes a rotating shaft 61 and an anti-slip rod 62, one end of the rotating shaft 61 is vertically and rotatably connected to the vertical side surface of the bottom plate 3, the rotating shaft 61 is perpendicular to the surface where the rotating shaft is located, the other end of the rotating shaft 61 is vertically and fixedly connected to the anti-slip rod 62, one end of the anti-slip rod 62, which is far away from the rotating shaft 61, is rotated to the position above or below the bottom surface of the bottom plate 3 along with the rotation of the rotating shaft 61, and when the anti-slip rod is rotated to the position below the bottom surface of the bottom plate 3, the length of the anti-slip rod 62, which extends out of the bottom. When the magnetic beads-DNA in the reaction tube need to be collected, after the moving plate 5 slides along the U-shaped slide rail 11 to a position right below the bottom plate 3, the rotating shaft 61 is rotated to rotate one end of the anti-slip rod 62 away from the rotating shaft 61 to a position below the bottom surface of the bottom plate 3, so that the moving plate 5 is prevented from sliding along a direction away from the opening of the U-shaped slide rail 11 to affect the collection of the magnetic particles in a part of the reaction tube away from the moving plate 5.

Further, an anti-slip structure 6 is disposed on a vertical side surface of the bottom plate 3 facing opposite to the opening of the U-shaped slide rail 11, the anti-slip structure 6 includes a rotating shaft 61 and an anti-slip rod 62, one end of the rotating shaft 61 is vertically connected to the bottom plate 3 and is rotatably connected to the bottom plate 3, the rotating shaft 61 of the rotating shaft 61 is perpendicular to the surface thereof, the other end of the rotating shaft 61 is vertically and fixedly connected to the anti-slip rod 62, one end of the anti-slip rod 62 away from the rotating shaft 61 is far away from or close to the bottom surface of the bottom plate 3 along with the rotation of the rotating shaft 61 and extends out of the bottom surface of the bottom plate 3, the length of the bottom surface of the bottom plate 3 is longer than the distance from the portion of the U-shaped slide rail 11 located below the bottom plate 3 to the bottom plate 3, when the moving plate magnetic beads-DNA in the reaction tube needs to be collected, the moving plate, by rotating the rotating shaft 61, one end of the anti-slip rod 62 away from the rotating shaft 61 approaches and extends out of the bottom surface of the bottom plate 3, so that the moving plate 5 is prevented from sliding along a direction facing away from the opening of the U-shaped slide rail 11 to affect the aggregation of magnetic particles in a part of the reaction tube away from the moving plate 5.

After the magnetic beads-DNA in the reaction tube are gathered, the magnetic beads-DNA can be washed after the liquid in the reaction tube is sucked and removed, after the liquid in the reaction tube is sucked, the rotating shaft 61 is rotated to enable one end, far away from the rotating shaft 61, of the anti-slip rod 62 to rotate away from the bottom surface of the bottom plate 3, and the moving plate 5 slides along the U-shaped slide rail 11 to enable the moving plate 5 to be far away from the bottom plate 3, so that the magnetic attraction effect of the moving plate 5 on the magnetic beads-DNA in the reaction tube is relieved, the dispersion of the magnetic beads-DNA can be facilitated, and the magnetic beads-DNA can be sufficiently washed, in the washing process, the moving plate 5 slides to the position right above the top plate 2, the vertical side plate 1 is contracted to the bottom of the moving plate 5 to be attached to the top of the reaction tube, so that the reaction tube on the magnetic rack can be fixed, and the reaction tube on the whole magnetic, the batch washing function is realized, the inconvenience of taking out the reaction tube for washing in the prior art is solved, the magnet does not need to be detached, the effect of the magnetic field on the magnetic bead-DNA in the reaction tube is controlled in a mode of sliding the moving plate 5, and the batch washing function is simple and convenient. In the process of reversely shaking the magnetic frame, the magnetic bead-DNA in the reaction tube is not aggregated by the magnetic field due to the shielding effect of the first magnetism isolating layer 52, so that the washing process is smoothly performed. Further, the moving plate 5 and the U-shaped slide rail 11 have the same opening direction and are provided with a second magnetism isolating layer 7 on the vertical side, so as to prevent the trouble in operation during washing caused by the fact that magnetic particles in the reaction tube slide to the top of the reaction tube along with the moving plate 5 in the process that the moving plate 5 slides from the right lower side of the bottom plate 3 to the top plate 2 when washing is required. Preferably, the second magnetic layer 7 is made of copper foil.

Further, the moving plate 5 is covered with a plastic housing to protect the moving plate 5 from abrasion after long-term use.

The working principle is as follows:

when in use, the distance between the top plate 2 and the bottom plate 3 can be adjusted according to the length of the reaction tube; when a DNA extraction and purification experiment is carried out, after a sample in a reaction tube is cracked, magnetic beads are added into a cracking solution, the magnetic beads are selectively combined with optimized DNA to form magnetic bead-DNA, then the reaction tube is placed on a magnetic frame, the moving plate 5 slides along the U-shaped slide rail 11 to the position under the bottom plate 3, the magnetic bead-DNA is rapidly gathered under the action of a magnetic field generated by the moving plate 5 and is separated from other substances in the cracking solution, the magnetic bead-DNA can be washed after the liquid in the reaction tube is sucked and removed, the moving plate 5 slides to the position over the top plate 2 after the liquid in the reaction tube is sucked, the vertical side plate 1 is contracted to the bottom of the moving plate 5 and is attached to the top of the reaction tube, so that the reaction tube on the magnetic frame is fixed, the reaction tube on the whole magnetic frame is reversely shaken to disperse the magnetic beads-DNA to obtain a full washing solution, batch washing is realized.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims

1. A magnetic rack, its characterized in that: the telescopic side plates are of telescopic structures, the telescopic directions of the vertical side plates are along the vertical directions of the vertical side plates, the two vertical side plates are parallel and opposite, the bottoms of the vertical side plates are positioned on the same plane, U-shaped slide rails are arranged on the opposite side faces of the vertical side plates, the U-shaped side edges of the two U-shaped slide rails are opposite and horizontally arranged, the top plate is provided with a plurality of through holes for communicating the top face and the bottom face, the top plate and the bottom plate are opposite and arranged on the U-shaped inner sides of the U-shaped slide rails and are arranged at intervals up and down, the top plate is positioned right above the bottom plate and is slidably mounted on the vertical side plates through a sliding limiting structure, and the sliding direction of the top plate is parallel; install the movable plate on the U type slide rail, the both ends of movable plate are respectively through slider and two U type slide rail sliding connection, the movable plate along U type slide rail slides extremely under the bottom plate or directly over the roof, the movable plate is the cube structure, and it comprises magnet board and first magnetism isolating layer, the bottom surface of magnet board sets up first magnetism isolating layer, the movable plate moves extremely under the bottom plate or when directly over the roof, the movable plate with through-hole on the roof all has the part of mutual alignment in vertical direction, first magnetism isolating layer is located the below of magnet board.

2. A magnetic stand according to claim 1, wherein: the bottom plate, the top plate and the vertical side plates are all made of nonmagnetic materials.

3. A magnetic stand according to claim 1, wherein: a plurality of grooves are formed in the top surface of the bottom plate, and the grooves are aligned with the through holes in the top plate in the vertical direction one by one.

4. A magnetic stand according to claim 1, wherein: the sliding limiting structure comprises strip-shaped through holes, a telescopic rod and a sliding guide rod, wherein the strip-shaped through holes are formed in the vertical side plate along the vertical direction, the two strip-shaped through holes are the same in length and are located at the same height of the vertical side plate and are located between the two ends of the U-shaped slide rail, the telescopic rod is accommodated in the strip-shaped through holes, the length direction of the telescopic rod is parallel to that of the strip-shaped through holes, one end of the telescopic rod is connected with the side wall at the lower end of each strip-shaped through hole, the other end of the telescopic rod is connected with the sliding guide rod, the sliding guide rod is horizontally arranged, one end of the sliding guide rod is connected with the top plate, the other end of the sliding guide rod is located.

5. A magnetic stand according to claim 1, wherein: the anti-skidding structure is arranged on the vertical side face, opposite to the opening direction of the U-shaped sliding rail, of the bottom plate and comprises a rotating shaft and an anti-skidding rod, one end of the rotating shaft is perpendicularly and rotatably connected with the vertical side face of the bottom plate, the rotating axis of the rotating shaft is perpendicular to the surface where the rotating shaft is located, the other end of the rotating shaft is perpendicularly and fixedly connected with the anti-skidding rod, one end, far away from the rotating shaft, of the anti-skidding rod rotates to the position above or below the bottom surface of the bottom plate along with the rotation of the rotating shaft, and when the anti-skidding rod rotates to the position below the bottom surface of the bottom plate, the length of the bottom surface of the bottom plate extending out is.

6. A magnetic stand according to claim 1, wherein: and when the moving plate is positioned under the bottom plate, the top surface of the moving plate is attached to the bottom surface of the bottom plate.

7. A magnetic stand according to claim 1, wherein: the movable plate is coated with a plastic shell.

8. A magnetic stand according to claim 1, wherein: and a second magnetism isolating layer is arranged on the vertical side face of the moving plate, which is towards the same direction as the opening of the U-shaped slide rail.

9. A magnetic stand according to claim 8, wherein: the first magnetism isolating layer and the second magnetism isolating layer are both made of copper foil.