Magnetic connecting device and display board adopting same

Abstract

A magnetic connecting device and a display board adopting the same are characterized in that the magnetic connecting device comprises a magnet mounting seat, a metal block and a magnet, the metal block and the magnet are mounted in the magnet mounting seat, magnetic poles N and S of the magnet are symmetrically distributed along the cross section of the magnet, and the magnet can freely rotate around the vertical axis of the magnet in the magnet mounting seat. In this way, a magnetic connection device is formed. The display board adopting the magnetic connecting device comprises a stand column and a panel, the magnetic connecting device is installed in the stand column, and the side edge of the panel is clamped and installed in an opening in one side of the stand column, so that the display board adopting the magnetic connecting device is formed. Adjacent display boards can be assembled by adjusting the surfaces at will.

Description

Technical Field

[0001] This utility model relates to a magnetic connection device and an exhibition board using the magnetic connection device, and more particularly to a standard exhibition board and advertising exhibition board suitable for short-term use. Background Technology

[0002] With the development of the market economy, companies are increasingly using exhibitions to conduct various activities. To showcase their strength, companies often decorate their booths extravagantly, expending considerable effort and wasting materials, without necessarily achieving the desired effect. The reality is simple: companies can set up their booths on-site, and the exhibition itself only lasts two or three days, plus staff rest. Therefore, to build a high-end, fast, and energy-efficient booth, the splicing of panels must be carefully considered, as only rapid assembly can save valuable time for decoration. While clips or nails are commonly used for connection, these methods are inconvenient and difficult to disassemble.

[0003] The existing display panels use aluminum alloy prisms, connecting rods, T-nails, locks, etc. for assembly and connection, which makes installation and disassembly cumbersome. After installation or disassembly, the materials are often easily damaged and cannot be reused, thus causing a waste of resources.

[0004] Chinese patent document (application number 2019214408989, utility model title: A Lightweight Magnetic Connecting Display Board) discloses a lightweight magnetic connecting display board, including a first display board and a second display board. Grooves are carved into the right side of the first display board and the left side of the second display board. A connector is installed in the groove of the first display board, and a magnet is glued to the groove of the second display board at a position corresponding to the connector. The connector includes two sliders, a connecting rod, a second magnet, a first spring, and a second spring. The connecting rod includes a first connecting rod and a second connecting rod, which are connected by a pin. A fixing rod is hinged to the top surface of the first display board, and a fixing seat is provided on the top surface of the second display board. L-shaped rubber pads are glued to the two left corners of the first display board and the two right corners of the second display board. This type of display board requires grooves to be carved into the sides of the board, and the connector structure is complex, causing many inconveniences in practical use.

[0005] Chinese patent document (application number 201120010244X, utility model name: Magnetic Display Board) discloses a magnetic display board, comprising: a frame and a panel. The front and back sides of the panel are provided with metal or non-metal plates that can be attracted by magnetic materials. The frame is a rectangular frame composed of a pair of crossbeams and a pair of side posts. The side posts are a left side post with magnetic material and a right side post with material that can be attracted by the magnetic material. In use, since one side post of the display board is magnetic, the display boards do not need to be installed with other connectors, but are connected by magnetic force, that is, the edges of the two display boards are aligned and attached. The drawback of this display board is that magnetic material and magnetic adsorption material are installed on the two sides of the display board respectively. That is, one side of the connection between two connected display boards is magnetic material, and the other side is magnetic adsorption material. Thus, the display board is face-dependent, meaning that the side must be identified during installation and cannot be reversed. This causes many inconveniences in use.

[0006] In magnetic connections, the principle of like poles repel and unlike poles attract is followed. Therefore, in the aforementioned patent literature, if magnetic materials are installed on both the left and right sides of the same display panel, the two display panels can only be connected when the polarities of the adjacent magnetic materials are opposite. In other words, the sides must still be identified during installation, and the sides cannot be reversed. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to overcome the defects of the above-mentioned display board, and to provide a magnetic connection device with a simple structure and a display board that is easy to install and disassemble and can be arbitrarily adjusted.

[0008] To achieve one of the objectives of this utility model, a simple magnetic connection device is provided. The basic technical solution is as follows: A magnetic connection device includes a magnet mounting base and a magnet. The magnet is a cylindrical or regular polygonal prism structure. The N and S poles of the magnet are symmetrically distributed along any straight line passing through the center of the cross-section of the prism, with the center of the cross-section as a reference. One side of the magnet mounting base has a vertically penetrating and inwardly recessed groove. The back of the groove is a recessed magnet mounting chamber. The upper and lower surfaces of the magnet mounting base are an upper side panel and a lower side panel, respectively, which axially restrict the vertical direction of the magnet mounting chamber. The magnet is vertically embedded in the magnet mounting chamber and can rotate freely around its vertical central axis. The outer surface of the right side of the magnet and the outer surface of the right side of the magnet mounting base are substantially in the same plane. This forms the magnetic connection device.

[0009] Furthermore, [A1] the magnet has a central hole on both the top and bottom surfaces. The upper and lower side panels of the magnet mounting base are provided with fixing screw holes at the corresponding positions of the magnet to be installed. Two positioning screws pass through the fixing screw holes of the upper and lower side panels respectively and press against the central hole of the magnet. The center connecting line of the two positioning screws coincides with the vertical central axis of the magnet. The magnet can rotate freely in the magnet mounting chamber between the upper and lower positioning screws around the connecting line of the upper and lower positioning screws, that is, the vertical central axis of the magnet.

[0010] Furthermore, the magnetic connection device also includes a metal block. The magnet mounting base has recessed metal block mounting chambers on both sides. After the metal block is embedded in the metal block mounting chamber, the outer surface of the metal block is substantially in the same plane as the outer surfaces of the front and rear sides of the magnet mounting base.

[0011] [A2] To achieve the second objective of this utility model, a display panel using the above-mentioned magnetic connection device is provided, which is easy to install and disassemble and can be arbitrarily adjusted. The basic technical solution is: a display panel using a magnetic connection device, including a column and a display panel.

[0012] The column includes a column body and a magnetic connection device disposed therein.

[0013] The magnetic connection device includes a magnet mounting base and a magnet. The magnet is a cylindrical or regular polygonal prism structure, with its N and S poles symmetrically distributed along any straight line passing through the center of the cross-section of the magnet, with the center of the cross-section as a reference. One side of the magnet mounting base has a vertically extending and inwardly recessed groove; the back of the groove is a recessed magnet mounting chamber. The upper and lower surfaces of the magnet mounting base are respectively an upper side panel and a lower side panel, which axially restrict the vertical movement of the magnet mounting chamber. The magnet is vertically embedded in the magnet mounting chamber and can rotate freely around its vertical central axis. The outer surface of the right side of the magnet and the outer surface of the right side of the magnet mounting base are substantially in the same plane. This forms the magnetic connection device.

[0014] Furthermore, [A3] the magnet has a central hole on both the top and bottom surfaces. The upper and lower side panels of the magnet mounting base are provided with fixing screw holes at the corresponding positions of the magnet to be installed. Two positioning screws pass through the fixing screw holes of the upper and lower side panels respectively and press against the central hole of the magnet. The center connecting line of the two positioning screws coincides with the vertical central axis of the magnet. The magnet can rotate freely in the magnet mounting chamber between the upper and lower positioning screws around the connecting line of the upper and lower positioning screws, that is, the vertical central axis of the magnet.

[0015] Furthermore, the magnetic connection device also includes a metal block. The magnet mounting base has recessed metal block mounting chambers on both sides. After the metal block is embedded in the metal block mounting chamber, the outer surface of the metal block is substantially in the same plane as the outer surfaces of the front and rear sides of the magnet mounting base.

[0016] The column body is a U-shaped thin-walled hollow profile. The center of this U-shaped profile contains a magnetic connection device cavity, the cross-sectional shape of which is similar to that of the aforementioned magnet mounting base. The magnetic connection device is embedded in this cavity within the column body, with the magnet and two metal blocks within the device firmly attached to their respective sidewalls within the column body. The side of the display panel is inserted into and secured within the column body. This forms a display panel employing a magnetic connection device.

[0017] The beneficial effects of this utility model are as follows: (1) When the display panel of this utility model adopts a magnetic connection device, since the side columns of the display panel are magnetic, the display panel does not need to be installed with other connecting parts. Instead, it is connected by magnetic force. The two display panels can be attracted together by simply aligning their edges and placing them adjacent to each other. In the same way, they can be assembled into an exhibition area or into multiple exhibition areas that are separated from each other. Therefore, it is convenient to install and disassemble the display panels. The entire installation and disassembly process does not require the use of screws, bolts, etc. The display panels are not easily damaged, making them reusable and safe. (2) The magnet in the magnetic connection device of this utility model is cylindrical in shape, and the magnetic poles N and S of the magnet are symmetrically distributed along any straight line passing through the center of the cross-section of the column. The magnet can rotate freely around its vertical axis in the cavity. Therefore, when two magnetic connecting parts are close to each other, the two magnets always maintain opposite attraction. Thus, the adjacent display panels can be arbitrarily adjusted and assembled.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the magnetic connection device of this utility model.

[0021] Figure 2This is a schematic diagram of the structure of the magnet mounting base 1 of this utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the magnet in this utility model.

[0023] Figure 4 yes Figure 1 Cross-sectional view along the AA direction.

[0024] Figure 5 yes Figure 2 Cross-sectional view along the BB direction.

[0025] Figure 6 Yes, yes Figure 5 Cross-sectional view along the CC direction.

[0026] Figure 7 This is a schematic diagram of the structure of the display panel using a magnetic connection device according to this utility model.

[0027] Figure 8 This is a schematic diagram of the structure of the column in the display panel of this utility model, which uses a magnetic connection device.

[0028] Figure 9 This utility model contains a schematic diagram of the structure of the column body.

[0029] Figure 10 This is a top view of the column body in this utility model.

[0030] Figure 11 yes Figure 7 Cross-sectional view along the DD direction.

[0031] Figure 12 This is a partial structural diagram of two display panels joined together using a magnetic connection device.

[0032] Figure 13 This is a partial structural diagram of two display panels joined together using a magnetic connection device, representing another form of the structure.

[0033] Figure 14 This is a partial structural diagram of four display panels joined together using magnetic connection devices.

[0034] In the diagram: magnet mounting base 1, magnetic connecting device 10, upper side panel 11, lower side panel 12, slide groove 13, magnet mounting chamber 14, metal block mounting chamber 15, fixing screw hole 16, metal block 2, magnet 3, magnet central axis 31, central hole 32, positioning screw 4, display panel 5, column 6, column body 61, magnetic connecting device receiving cavity 611, side wall 612, straight wall 613, tail wall 614, sealing wall 615, reinforcing rib 6151, first display panel 7, second display panel 8. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0036] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0037] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0038] In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] Example 1

[0041] It should be noted that in the description of this embodiment 1, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship, based on the appendix. Figure 1 Or attached Figure 5 A description of the orientation or positional relationship shown.

[0042] See Figures 1 to 5 A magnetic connection device 10 includes a magnet mounting base 1 and a magnet 3.

[0043] The magnet 3 is a cylindrical permanent magnet extending vertically. The center of the cross-section of the magnet 3 has a central axis 31 perpendicular to it. The magnetic poles N and S of the magnet 3 are symmetrically distributed along any diameter of the cross-section of the cylinder with the central axis 31 as the reference.

[0044] The magnet mounting base 1 is a cylindrical shape extending vertically. Its left side has a vertically extending and inwardly recessed groove 13. The back side of the groove 13, i.e., the right side of the magnet mounting base 1, has a recessed magnet mounting chamber 14 for accommodating the magnet 3. The magnet mounting chamber 14 is a cylindrical cavity formed parallel to the magnet mounting base 1 and extending vertically. The shape and size of the magnet mounting chamber 14 are adapted to the magnet 3 embedded within it. The upper and lower surfaces of the magnet mounting base 1 are an upper side panel 11 and a lower side panel 12, respectively. The upper side panel 11 and the lower side panel 12 axially restrict the vertical direction of the magnet mounting chamber 14. After the magnet 3 is vertically embedded in the magnet mounting chamber 14, the right side of the magnet 3 and the right side of the magnet mounting chamber 14 are essentially in the same plane, and the magnet 3 can freely rotate around its vertical magnet central axis 31 within the magnet mounting chamber 14.

[0045] The magnet mounting base 1 is made of aluminum alloy, tin alloy, zinc alloy or other materials that cannot be attracted by magnetic materials.

[0046] See Figure 6 In some embodiments, the magnetic connection device 10 further includes two metal blocks 2, which are flat rectangular materials that can be attracted by magnetic materials, such as flat iron.

[0047] See Figure 2 The magnet mounting base 1 also includes metal block mounting chambers 15 recessed on the front and rear sides. The upper side panel 11 and the lower side panel 12 restrict the vertical direction of the metal block mounting chambers 15 in the axial direction. The depth of the recess of the metal block mounting chambers 15 is approximately equal to the thickness of the metal block 2. The shape and size of the metal block mounting chambers 15 are adapted to the metal block 2. After the two metal blocks 2 are respectively embedded in the metal block mounting chambers 15 on both sides, the outer surface of the metal block 2 and the outer surface of the front and rear sides of the magnet mounting base 1 are basically in the same plane.

[0048] See Figure 4 and Figure 5In some embodiments, the magnet 3 described in [A4] [A5] [A6] has a central hole 32 on both the upper and lower surfaces. The upper side panel 11 and lower side panel 12 of the magnet mounting base are provided with fixing screw holes 16 at positions corresponding to the central hole 32 of the magnet 3. Two positioning screws 4 pass through the fixing screw holes 16 of the upper side panel 11 and the lower side panel 12 respectively and press against the central hole 32 of the magnet 3. The center connecting line of the two positioning screws 4 coincides with the vertical magnet central axis 31 of the magnet 3. The magnet 3 can rotate freely between the upper and lower positioning screws 4 in the magnet mounting chamber 14, around the connecting line of the upper and lower positioning screws 4, that is, the vertical axis 31 of the magnet 3.

[0049] In other words, see Figures 1 to 5 A magnetic connection device 10 includes a magnet mounting base 1, metal blocks 2, and a magnet 3. The N and S poles of the magnet 3 are symmetrically distributed along its cross-section. The metal block 2 is a flat, rectangular material that can be attracted by magnetic materials. The magnet mounting base 1 is a cylindrical structure with a vertically extending and inwardly recessed groove 13 on its left side, a recessed magnet mounting chamber 14 on its right side, and a recessed metal block mounting chamber 15 on each of its front and rear sides. The upper and lower sides of the metal block mounting chamber 15 are respectively an upper panel 11 and a lower panel 12. The magnet 3 is vertically embedded in the magnet mounting chamber 14 and is positioned within the chamber by two positioning screws 4 passing through fixing screw holes 16 on the upper and lower panels 11 and 12 of the magnet mounting base 1. The magnet 3 can rotate freely around its vertical magnet central axis 31. Two metal blocks 2 are respectively embedded in the metal block mounting chambers 15. This forms the magnetic connection device.

[0050] The magnet 2 is embedded in the magnet mounting chamber 14 of the magnet mounting base 1 and can rotate freely around its vertical axis. This ensures that when two magnet mounting bases 1 with magnet 2 installed are close to each other in the horizontal direction, due to the repulsion of like poles and attraction of unlike poles of magnet 2, the N pole of the magnet 2 in one magnet mounting base 1 is always attracted and close to the S pole of the magnet 2 in the other magnet mounting base 1.

[0051] Example 2

[0052] It should be noted that in the description of this embodiment 2, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship, based on the appendix. Figure 7 Or attached Figure 8 A description of the orientation or positional relationship shown.

[0053] See Figure 7An exhibition panel employing the magnetic connection device 10 described in Embodiment 1 above includes a column 6 and an exhibition panel 5.

[0054] See Figures 7 to 11 The column 6 includes a column body 61 and a magnetic connecting device 10 disposed therein. The column body 61 is a U-shaped thin-walled hollow profile, including two side walls 612, one straight wall 613, two inclined walls 614 and a sealing wall 615. The inclined wall 614, side walls 612 and straight wall 613 are all thin-walled straight plates. The sealing wall 615 has an inner groove that runs vertically through and is recessed inward, and also has reinforcing ribs 6151 extending vertically. A U-shaped thin-walled hollow profile is formed by connecting one inclined wall 614, one side wall 612, one straight wall 613, another side wall 612, another inclined wall 614, and a sealing wall 615 end to end. In the center is a magnetic connection device receiving cavity 611, whose shape corresponds to the cross-sectional shape of the magnet mounting base 1 in Embodiment 1. The magnetic connection device 10 is embedded in the magnetic connection device receiving cavity 611 within the column body 61. A portion of the sealing wall 615 is embedded in the sliding groove 13 of the magnet mounting base 1. Each side of the magnet mounting base 1 is tightly attached to the corresponding side wall inside the column body 61. The magnet mounting base 1 is fixed in the magnetic connection device receiving cavity 611 inside the column body 61 by screws or glue. The outer side of the magnet 3 in the magnetic connection device 10 is also tightly attached to the straight wall 613 inside the column body 61. The outer sides of the two metal blocks 2 in the magnetic connection device 10 are tightly attached to the two side walls 612 inside the column body 61. One side of the display panel 5 is inserted into the groove of the sealing wall 615 of the column body 61 and tightened.

[0055] See also Figure 7 In some embodiments, the display panel using the magnetic connection device 10 described in Embodiment 1 above includes two pillars 6 and a display panel 5, with the display panel 5 clamped between the two pillars 4 on the left and right.

[0056] In some embodiments, one column 6 has two magnetic connecting devices 10, and the two magnetic connecting devices 10 are respectively embedded in the magnetic connecting device receiving cavities 611 at the upper and lower ends of the column body 61.

[0057] In some embodiments, each column 6 has at least three magnetic connecting devices 10, and each magnetic connecting device 10 is uniformly embedded in the magnetic connecting device receiving cavity 611 of the column body 61.

[0058] The steps for assembling the display panel using the magnetic connection device 10 in this embodiment are as follows: See Figure 1 , Figure 4 and Figure 7First, the magnetic connection device 10 is installed. The magnet 3 is then embedded into the magnet mounting chamber 14 of the magnet mounting base 1. Two positioning screws 4 pass through the fixing screw holes 16 of the upper side panel 11 and lower side panel 12 of the magnet mounting base 1, pressing against the upper and lower center holes 32 of the magnet 3. This positions the magnet 3 and allows it to rotate freely around its vertical magnet central axis 31. Two metal blocks 2 are respectively embedded in the metal block mounting chamber 15. If the metal blocks 3 become too loose in any chamber, springs can be inserted for fixation. This forms the magnetic connection device.

[0059] The next step is to assemble the column 6, and install the magnetic connection device 10, which has the magnet 3 and the metal block 2 installed, into the magnetic connection device receiving cavity 611 of the column body 61 and fix it.

[0060] Next, the display panel is assembled. The side of the display panel 5 is inserted into the opening of the column body 61 through the opening of the column body 61, where the magnetic connection device 10 is installed, and then inserted tightly into the slide groove 13 of the magnet mounting base 1.

[0061] Application Example 1

[0062] The first display panel 7 and the second display panel 8 are the two display panels using a magnetic connection device as described in Example 2. See [link / reference] Figure 12 The two display panels, which are connected by a magnetic connection device, are erected side by side. The straight wall 613 of the right column of the first display panel 7 and the straight wall 613 of the left column of the second display panel 8 are pressed together face to face (with a gap in the figure for clarity). At this time, the polarity of the magnets 3 in the two display panels is automatically adjusted to the opposite poles attracting each other. That is, if the left side of the magnet 3 of the first display panel 7 is the N pole and the right side is the S pole, then the left side of the magnet 3 of the second display panel 8 is the N pole and the right side is the S pole.

[0063] In some application examples, see Figure 13 The two display panels, which are connected by a magnetic connection device, are erected together at a 90° angle. The side wall 612 of the right column of the first display panel 7 and the straight wall 613 of the left column of the second display panel 8 are close together (with a gap in the figure for clarity). At this time, the magnet 3 of the second display panel is attracted to the metal block 2 of the first display panel. The polarity of the magnets 3 in the two display panels is also automatically adjusted to the opposite polarity attraction state. That is, if the lower side of the magnet 3 of the first display panel 7 is the N pole and the upper side is the S pole, then the lower side of the magnet 3 of the second display panel 8 is the N pole and the upper side is the S pole.

[0064] In some embodiments, both the first display panel 7 and the multiple second display panels 8 are display panels using magnetic connection devices, see [link to documentation]. Figure 14The first display panel 7 can be connected to multiple second display panels 8 simultaneously, or to any one of the multiple second display panels 8. The positional relationship between two adjacent display panels can be that they are side by side or connected together at 90°. The polarity of the magnets 2 in the two display panels is always automatically adjusted to a state of opposite poles attracting each other.

[0065] By extension, columns 6 can be installed on all four sides of the display panel 5, allowing other display panels to be connected to the left, right, top, and bottom of the panel.

[0066] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A magnetic connection device, characterized by: A magnetic connecting device comprises a magnet holder and a magnet; the magnet is a cylinder or a regular polygonal column structure, and the magnetic poles N and S of the magnet are symmetrically distributed along any straight line passing through the center of the cross section of the column and the center of the cross section of the column; one side of the magnet holder has a sliding groove which is through and recessed inward; the back of the sliding groove is a recessed magnet holder chamber; the upper and lower surfaces of the magnet holder are the upper and lower side panels, respectively, and the upper and lower side panels form the upper and lower limits of the magnet holder chamber in the axial direction; the magnet is vertically embedded in the magnet holder chamber and can freely rotate around the vertical magnet center axis; the outer surface of the right side of the magnet is substantially in the same plane as the outer surface of the right side of the magnet holder.

2. A magnetic attachment device according to claim 1, wherein: The upper and lower surfaces of the magnet have center holes, and two positioning screws pass through the upper and lower side panels and abut against the center holes of the magnet; the magnet can freely rotate around the connecting line of the two positioning screws in the magnet holder chamber. ​ 3. A magnetic attachment device according to claim 1, wherein: The magnetic connecting device further comprises a metal block; the two sides of the magnet holder also have recessed metal block holder chambers, and the metal block is embedded in the metal block holder chamber; the outer surface of the metal block is substantially in the same plane as the outer surfaces of the front and back sides of the magnet holder. ​ 4. A display board employing a magnetic connection device, characterized by: A stand and a display panel are included; the stand comprises a stand body and a magnetic connecting device arranged therein; The magnetic connecting device comprises a magnet holder and a magnet; the magnet is a cylinder or a regular polygonal column structure, and the magnetic poles N and S of the magnet are symmetrically distributed along any straight line passing through the center of the cross section of the column and the center of the cross section of the column; one side of the magnet holder has a sliding groove which is through and recessed inward; the back of the sliding groove is a recessed magnet holder chamber; the upper and lower surfaces of the magnet holder are the upper and lower side panels, respectively, and the upper and lower side panels form the upper and lower limits of the magnet holder chamber in the axial direction; the magnet is vertically embedded in the magnet holder chamber and can freely rotate around the vertical magnet center axis; the outer surface of the right side of the magnet is substantially in the same plane as the outer surface of the right side of the magnet holder. The stand body is a "concave” thin-walled hollow profile, and the middle of the "concave” thin-walled hollow profile is a magnetic connecting device accommodating cavity with a shape similar to the cross-sectional shape of the aforementioned magnet holder; the magnetic connecting device is embedded in the magnetic connecting device accommodating cavity in the stand body, and the magnet and the two metal blocks in the magnetic connecting device are in close contact with the corresponding side walls in the stand body, respectively; one side edge of the display panel is inserted into and tightly inserted into the stand body.

5. A display panel incorporating magnetic attachment means according to claim 4 wherein: The upper and lower surfaces of the magnet have center holes, and two positioning screws pass through the upper and lower side panels and abut against the center holes of the magnet; the magnet can freely rotate around the connecting line of the two positioning screws in the magnet holder chamber.

6. The display board employing the magnetic connecting device according to claim 4, wherein: Each of the left and right sides of the display panel has a stand, and the display panel is clamped between the left and right stands.

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