Rotating magnetic fluid display device

Abstract

The present application discloses a rotating magnetic fluid display device, which relates to the field of display technology. A display screen is rotatably arranged on the front of an electromagnetic generating unit, wherein the display screen has a flat, hollow structure, the front of the display screen is made of a transparent material, and the display screen contains magnetic fluid. The electromagnetic generating unit includes a substrate and a control drive unit. A plurality of planar coils are arranged in front of the substrate, and the plurality of planar coils are arranged according to a predetermined rule. The planar coils are electrically connected to the control drive unit. This structure greatly reduces the weight of the entire display device and is also very small in size, making it easy to assemble, package, and transport. The entire device has a reasonable design, a clever structure, low cost, easy operation, and is easy to carry.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a rotating magnetic fluid display device. Background Art

[0002] Magnetic fluid is a colloidal dispersion of magnetic particles ranging in size from a few nanometers to tens of nanometers. Magnetic fluid exhibits a unique property combining fluidity and magnetization. Magnetic fluid was first produced by NASA in the 1960s by pulverizing magnetite ore in a ball mill, coating the surface of the magnetite particles with a surfactant, and dispersing the magnetite particles in kerosene. This method is used to magnetically fluidize rocket fuel, enabling it to be used even in zero-gravity conditions. To facilitate scientific popularization, people use magnetic fluids combined with various forms of magnetic force to achieve display. For example, CN213582946U discloses a magnetic fluid display, which includes an outer cover, a display body, an electromagnet dot matrix unit, and a controller. The quartz glass shell of the display body contains magnetic fluid and a carrier liquid. The electromagnet dot matrix unit is arranged on the back of the quartz glass shell and includes an electromagnet array and a switching transistor array. The acrylic plate of the electromagnet array has multiple mounting holes, each of which is provided with an electromagnet, and the electromagnet abuts the quartz glass shell. The switching transistor array is arranged on the back of the electromagnet dot matrix unit and includes a circuit board and multiple switching transistors arranged on the circuit board. Each switching transistor controls one electromagnet. The multiple switching transistors are connected to the signal terminal of the controller via wires. In existing electromagnet processes, the electromagnet requires at least an iron core and a coil. The iron core is generally made of a magnetic conductive material, the most common being iron, cobalt, and nickel. It is relatively heavy and bulky, resulting in the entire display being large and heavy, making it inconvenient to carry. For larger magnetofluid display scenarios, traditional technology becomes more cumbersome and consumes more energy. Summary of the Invention

[0003] To solve the above problems, this application adopts the following technical solutions:

[0004] A rotating magnetic fluid display device, comprising:

[0005] The electromagnetic generating unit has a flat plate structure and is used to generate a plurality of regularly distributed electromagnetic fields;

[0006] A display screen is rotatably arranged on the front of the electromagnetic generating unit, the display screen is a flat hollow structure, the front of the display screen is made of a transparent material, and a magnetic fluid is contained in the display screen;

[0007] The electromagnetic generating unit includes a substrate and a control driving unit, and a plurality of planar coils are arranged in front of the substrate;

[0008] The plurality of planar coils are arranged according to a predetermined rule;

[0009] The planar coil is electrically connected to the control drive unit. The flat-plate structure of the electromagnetic generator unit, thanks to the placement of the planar coil in front of the substrate, makes the entire electromagnetic generator unit flatter, lighter, smaller, and easier to transport and maintain than existing magnetic fluid displays that use spiral coils with an iron core structure. This structure can be directly fixed to a wall for display, making it particularly suitable for popular science demonstrations in large venues. Similar to existing technologies, the display screen is a hollow, sealed container containing magnetic fluid and a carrier liquid. The display screen is configured to rotate relative to the electromagnetic generator unit, facilitating the flipping of the magnetic fluid, causing it to fall from top to bottom. During the fall, the planar coil attracts some of the magnetic fluid to achieve the purpose of display. The control drive unit is a device that can turn the power supply of the planar coil on and off. It contains a transistor matrix chip, a communication module for communicating with a host computer, a control module, etc., and transmits data via the host computer. The control drive unit receives the data and displays the corresponding information.

[0010] Preferably, the planar coil is in the shape of a hairspring and is attached to the substrate;

[0011] Multiple planar coils are evenly arranged to form a dot array in front of the substrate. The hairspring-like planar coil resembles a planar spiral, and multiple such spirals together form the dot array of the display screen. This principle is similar to an LED dot matrix. By connecting or disconnecting planar coils in different positions, different patterns can be displayed with the help of magnetic fluid. Planar coils are not limited to spiral shapes and can also be in the shape of a U-shaped structure or a combination of other structures, such as triangles, stars, etc.

[0012] Preferably, the substrate is a copper-clad aluminum-based laminate, and the planar coil is fabricated using the copper cladding on the substrate. A copper-clad aluminum-based laminate, also known as an aluminum substrate, is a type of printed circuit board. It utilizes an aluminum alloy substrate with copper cladding. This structure offers excellent heat dissipation and mechanical strength, ensuring that the planar coil does not overheat when high current flows through it, thereby extending the life of the entire device.

[0013] Preferably, the control drive unit is fixedly arranged behind the electromagnetic generating unit; such a design makes the entire device more compact and convenient for transportation.

[0014] The electromagnetic generating unit is fixed to a support frame. The support frame is a square-shaped structure that matches the dimensions of the baseboard and is screwed to the back of the baseboard. The entire support frame is welded from square tubes and has a supporting plate at its bottom. The support frame facilitates the erection of the display device and is easy to disassemble, assemble, and transport, making it suitable for temporary use in relatively open spaces such as squares, exhibition halls, and science and technology museums.

[0015] Preferably, the display screen includes a transparent shell and a rotating shell. The transparent shell is made of transparent material in the shape of a square container with one side open. The transparent shell is made of transparent plastic or transparent acrylic, which is easy to process and relatively inexpensive.

[0016] The rotating shell is made of stainless steel; a rotating shell made of stainless steel has sufficient mechanical strength and does not affect the penetration of electromagnetic force.

[0017] The rotating shell includes a base plate, which has a rectangular structure and a baffle on one side. The baffle is arranged around the base plate to form a U-shaped structure corresponding to the base plate; the baffle protrudes relative to the base plate and extends into the transparent shell. Such a structure can ensure that the transparent shell has sufficient fixed support positions, and is evenly stressed during rotation and is not easily damaged.

[0018] A rotating shell shaft is fixedly provided at the center of the other side of the base plate. The rotating shell shaft is a hollow structure with an open end away from the base plate. An electromagnet is provided in the rotating shell shaft. Considering that the rotating shell shaft occupies a large space, it will result in that the substrate corresponding to the rotating shell shaft cannot be provided with a planar coil, because a rotating shaft hole for inserting the rotating shell shaft needs to be provided at this position. In order not to affect the display effect, the rotating shell shaft is made into a hollow structure, and one or more electromagnets are fixed therein. The distribution of these electromagnets corresponds to the distribution of the planar coil, so that the distribution of the dot matrix will not be affected by the provision of the rotating shell shaft.

[0019] The transparent shell is sleeved and fixed on the rotating shell;

[0020] A rotation shaft hole is provided at the center of the base plate, and the rotation shaft of the rotation housing can be rotatably passed through the rotation shaft hole;

[0021] The electromagnetic generating unit further includes a rotating mechanism;

[0022] The rotating mechanism is fixedly mounted behind the base plate and is rotatably connected to the rotating housing shaft. The rotating mechanism is an electric rotating mechanism that drives the rotating housing shaft, thereby rotating the rotating housing to achieve magnetic fluid reversal. The rotating mechanism can be a conventional electric motor coupled with a belt drive or chain drive, or it can utilize gear meshing, as long as it can achieve rotation.

[0023] Preferably, the rotating mechanism includes a rotating mechanism base, the rotating mechanism base is a square structure, a base shaft hole is opened through the middle, an electromagnet bracket is fixedly provided on one side of the rotating mechanism base, the electromagnet bracket is an L-shaped structure, an electromagnet fixing hole is opened in the middle; the electromagnet fixing hole is coaxially arranged with the base shaft hole; the electromagnet is fixedly provided in the electromagnet fixing hole;

[0024] The rotating shell shaft is rotatably installed in the shaft hole of the base, and the electromagnet is installed in the rotating shell shaft;

[0025] A spur gear is fixedly sleeved on the rotating shaft of the rotating shell, the spur gear is engaged with a worm, the worm is fixedly connected to the output rotating shaft of the motor, and the motor is fixedly arranged on the rotating mechanism base.

[0026] Preferably, the base of the rotating mechanism is made of copper. Copper is a good lubricant. By utilizing its unique properties, the rotational resistance of the rotating housing shaft in the base shaft hole can be reduced, thereby eliminating components such as bearings, saving a certain amount of cost, and simplifying the design.

[0027] Preferably, the motor is a DC reduction motor. The motor is a DC reduction motor with the output perpendicular to the motor center axis, that is, the gearbox shaft is output at 90 degrees, which is more compact and smaller in size.

[0028] Preferably, the bottom plate is made of a stainless steel plate with a thickness of 0.5-1 mm, which is a suitable thickness range as it can ensure mechanical strength without affecting the effect of electromagnetic force.

[0029] Preferably, a plurality of core holes are formed through the substrate, the core holes corresponding to the planar coils, and the core holes are located at the center of the planar coils;

[0030] An iron core is disposed within the core hole. This structure enhances the magnetic force generated by the electromagnetic coil without compromising the overall size of the device. The iron core can be a magnetic core or riveted together using common iron rivets, which facilitates production and reduces costs.

[0031] The beneficial effects of adopting this preferred technical solution include:

[0032] A display screen is rotatably mounted on the front of an electromagnetic generator unit. The display screen is a flat, hollow structure, made of a transparent material, and contains a magnetic fluid. The electromagnetic generator unit includes a substrate and a control drive unit. Multiple planar coils are positioned in front of the substrate, arranged according to a predetermined pattern and electrically connected to the control drive unit. This structure significantly reduces the weight of the entire display device and makes it compact, making it easy to assemble, package, and transport. The entire device features a rational design, a clever structure, low cost, and is easy to operate and carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the embodiment provided by this application;

[0034] Figure 2 is a schematic diagram of the three-dimensional structure of another perspective of the embodiment provided by the present application;

[0035] Figure 3 It is an exploded schematic diagram of an embodiment provided by this application;

[0036] Figure 4 This is a front view of the electromagnetic generating unit in the embodiment provided in this application;

[0037] Figure 5 yes Figure 4 A partial enlarged schematic diagram;

[0038] Figure 6 This is a front view of the rotating shell in the embodiment provided by this application;

[0039] Figure 7 It is a left side view of the rotating shell in the embodiment provided in this application;

[0040] Figure 8 is a rear view of the rotating housing in the embodiment provided in this application;

[0041] Figure 9 is a partial cross-sectional view of the rotating shell in the embodiment provided in this application;

[0042] Figure 10 is a schematic diagram of the overall structure of the rotating mechanism in the embodiment provided in this application;

[0043] Figure 11 It is an exploded schematic diagram of the rotating mechanism in the embodiment provided in this application. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the embodiments of the present application. Figures 1 to 11, the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present application.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0046] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0047] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0048] like Figures 1 to 11 As shown, a rotating magnetic fluid display device includes two parts: a display screen 1 and an electromagnetic generating unit 2, wherein:

[0049] The electromagnetic generating unit 2 has a flat plate-like structure and is used to generate multiple regularly distributed electromagnetic fields. The electromagnetic generating unit 2 includes a substrate 20 and a control and drive unit 22. A plurality of planar coils 201 are disposed on the front of the substrate 20. The planar coils 201 are arranged according to a predetermined pattern, such as a dot matrix arrangement or an arrangement that simulates LED digital tubes. The planar coils 201 are electrically connected to the control and drive unit 22.

[0050] The display screen 1 is rotatably arranged on the front of the electromagnetic generating unit 2. The display screen 1 is a flat hollow structure. The front of the display screen 1 is made of a transparent material. The display screen 1 is filled with magnetic fluid.

[0051] The flat-plate structure of the electromagnetic generating unit 2, thanks to the use of a planar coil 201 positioned in front of the substrate 20, makes the entire electromagnetic generating unit 2 flatter, lighter, smaller, and easier to transport and maintain than existing magnetic fluid displays that use spiral coils with an iron core structure. This structure can be directly fixed to a wall for display, making it particularly suitable for popular science demonstrations in large venues. Similar to the prior art, the display screen 1 is a hollow, sealed container containing magnetic fluid and a carrier liquid. The display screen 1 is configured to rotate relative to the electromagnetic generating unit 2, facilitating the magnetic fluid's flipping and falling from top to bottom. During the falling process, the planar coil 201 attracts some of the magnetic fluid to achieve the purpose of display. The control drive unit 22 is a device that can turn the power supply of the planar coil 201 on and off. It is equipped with a transistor matrix chip, a communication module for communicating with a host computer, a control module, etc., and transmits data via the host computer, which then receives the data and displays the corresponding information.

[0052] In one embodiment, the planar coil 201 is in the shape of a hairspring and is attached to the substrate 20. Multiple planar coils 201 are evenly arranged to form a dot array in front of the substrate 20. The hairspring-shaped planar coil 201 resembles a planar spiral, and multiple such spirals together form the dot array of a display screen. This principle is similar to an LED dot matrix. By connecting or disconnecting planar coils 201 in different positions, different patterns can be displayed in conjunction with the magnetic fluid. The planar coil 201 is not limited to a spiral shape and can also be a U-shaped structure or a combination of other structures, such as a triangle or star.

[0053] In one embodiment, the substrate 20 is a metal aluminum-based copper-clad laminate, and the planar coil 201 is made of the copper clad on the substrate 20. A metal aluminum-based copper-clad laminate, also known as an aluminum substrate, is a type of printed circuit board. It uses an aluminum alloy as a substrate and is covered with copper. This structure has excellent heat dissipation and high mechanical strength, ensuring that the planar coil 201 does not overheat when high current flows, thereby extending the life of the entire device.

[0054] In one embodiment, the control drive unit 22 is fixedly mounted behind the electromagnetic generating unit 2. This design makes the entire device more compact and easier to transport. The electromagnetic generating unit 2 is fixedly mounted on a support frame 3. The support frame 3 is a square-shaped structure that corresponds to the size of the substrate and is fixed to the back of the substrate with screws. The entire support frame is welded from square tubes, and a supporting plate is provided at the bottom. The support frame 3 facilitates the erection of the display device. This structure is easy to disassemble and transport, making it suitable for temporary use in relatively open spaces such as squares, exhibition halls, and science and technology museums.

[0055] In one embodiment, the display screen 1 includes a transparent shell 10 and a rotating shell 11. The transparent shell 10 is made of a transparent material in the shape of a square container with one side open. The transparent shell 10 is made of transparent plastic or transparent acrylic, which is easy to process and relatively inexpensive.

[0056] The rotating housing 11 is made of stainless steel; the rotating housing 11 made of stainless steel has sufficient mechanical strength and does not affect the penetration of electromagnetic force.

[0057] The rotating housing 11 includes a base plate 110, which has a rectangular structure and a baffle 111 on one side. The baffle 111 is arranged around the base plate 110 to form a U-shaped structure corresponding to the base plate 110; the baffle 111 protrudes relative to the base plate and extends into the transparent housing 10. This structure can ensure that the transparent housing 10 has sufficient fixed support positions, and evenly applies force during rotation to prevent damage.

[0058] A rotating housing shaft 112 is fixedly provided at the center of the other side of the base plate 110. The rotating housing shaft 112 is a hollow structure with an open end away from the base plate 110. An electromagnet 214 is provided within the rotating housing shaft 112. Considering that the rotating housing shaft 112 occupies a large space, it is impossible to provide a planar coil on the substrate corresponding to the rotating housing shaft 112 because a rotating shaft hole 202 for inserting the rotating housing shaft 112 is required at this location. To avoid affecting the display effect, the rotating housing shaft 112 is made into a hollow structure, and one or more electromagnets are fixedly provided therein. The distribution of these electromagnets corresponds to the distribution of the planar coils, so that the distribution of the dot matrix is not affected by the provision of the rotating housing shaft 112.

[0059] The transparent shell 10 is sleeved and fixed on the rotating shell 11;

[0060] A rotation shaft hole 202 is opened at the center of the base plate 20, and the rotation housing shaft 112 can be rotatably passed through the rotation shaft hole 202;

[0061] The electromagnetic generating unit 2 further includes a rotating mechanism 21;

[0062] The rotating mechanism 21 is fixedly mounted behind the base plate 20 and is rotatably connected to the rotating housing shaft 112. The rotating mechanism 21 is an electric rotating mechanism that drives the rotating housing shaft 112 to rotate, thereby driving the rotating housing 11 to rotate and flip the magnetic fluid. The rotating mechanism 21 can be a conventional electric motor coupled with a belt drive or chain drive, or it can be driven by gear meshing, as long as it can achieve rotation.

[0063] The rotating mechanism 21 includes a rotating mechanism base 210. The rotating mechanism base 210 is a cubic structure with a base shaft hole 2100 extending through its center. The rotating mechanism base 210 is made of copper. Copper is a highly lubricating material. Its unique properties can reduce the resistance to rotation of the rotating housing shaft 112 within the base shaft hole 2100. This eliminates the need for bearings and other components, reduces costs, and simplifies the design. An electromagnet bracket 211 is fixedly mounted on one side of the rotating mechanism base 210. The electromagnet bracket 211 is L-shaped and has an electromagnet fixing hole 2110 coaxially disposed with the base shaft hole 2100. The electromagnet 214 is fixedly mounted within the electromagnet fixing hole 2110. The rotating housing shaft 112 is rotatably mounted within the base shaft hole 2100, and the electromagnet 214 is mounted within the rotating housing shaft 112. A spur gear 213 is fixedly sleeved on the rotating housing shaft 112 . The spur gear 213 is engaged with a worm 2120 . The worm 2120 is fixedly connected to the output shaft of the motor 212 . The motor 212 is fixedly mounted on the rotating mechanism base 210 .

[0064] The motor 212 is a DC reduction motor with a vertical output to the motor center axis, that is, the gearbox shaft is output at 90 degrees, which makes the structure more compact and smaller.

[0065] It should be noted that the bottom plate 110 is made of a stainless steel plate with a thickness of 0.5-1 mm. Such a thickness can ensure mechanical strength while not affecting the effect of electromagnetic force, and is a relatively suitable thickness range.

[0066] In one embodiment, the substrate 20 is provided with a plurality of core holes 200 extending therethrough. Each core hole 200 corresponds to the planar coil 201 and is located at the center of the planar coil 201. An iron core is disposed within each core hole 200. This structure enhances the magnetic force generated by the electromagnetic coil without compromising the overall size of the device. The iron core can be a magnetic core or riveted together using common iron rivets, which facilitates production and reduces costs.

[0067] During operation, the planar coil 201 is initially de-energized, causing the magnetic fluid in the display screen 1 to fall to the bottom of the inner cavity. When a numerical value or pattern is to be displayed, the host computer transmits the desired graphic data to the control and drive unit 22. The control and drive unit 22 includes a microcontroller that receives and processes the data. After receiving and decomposing the data, the corresponding planar coil 201 is energized, thereby generating a magnetic field. The control and drive unit 22 then energizes the motor 212, which in turn drives the worm 2120 to rotate, thereby rotating the spur gear 213, the rotating housing shaft 112, the bottom plate 110, the baffle 111, and the transparent housing 10 180 degrees. During this rotation, the magnetic fluid in the display screen 1 moves from its original position at the bottom to the top, slowly descending under the influence of gravity. During this descent, it is attracted by the magnetic force of the energized planar coil, adsorbing it near the planar coil. Multiple planar coils are energized simultaneously, collectively adsorbing the magnetic fluid, thereby displaying a pattern.

[0068] The present application is provided with a display screen 1 rotatably arranged on the front of an electromagnetic generating unit 2, wherein the display screen 1 is a flat hollow structure, the front of the display screen 1 is made of a transparent material, and a magnetic fluid is contained in the display screen 1. The electromagnetic generating unit 2 includes a substrate 20 and a control drive unit 22, and a plurality of planar coils 201 are arranged in front of the substrate 20. The plurality of planar coils 201 are arranged according to a predetermined rule, and the planar coils 201 are electrically connected to the control drive unit 22. Such a structure greatly reduces the weight of the entire display device and is also very small in size, making it easy to assemble, package and transport. The entire device is rationally designed, ingeniously structured, low-cost, easy to operate and easy to carry.

Claims

1. A rotating magnetic fluid display device, characterized in that: include: An electromagnetic generating unit (2) having a flat plate structure and used for generating a plurality of electromagnetic fields regularly distributed relative to each other; A display screen (1) is rotatably arranged on the front of the electromagnetic generating unit (2), the display screen (1) is a flat hollow structure, the front of the display screen (1) is made of a transparent material, and a magnetic fluid is contained in the display screen (1); The electromagnetic generating unit (2) comprises a substrate (20) and a control drive unit (22), and a plurality of planar coils (201) are arranged in front of the substrate (20); The plurality of planar coils (201) are arranged according to a predetermined rule; The planar coil (201) is electrically connected to the control drive unit (22); The display screen (1) comprises a transparent shell (10) and a rotating shell (11); the transparent shell (10) is made of a transparent material and is in the shape of a square container with one side open; The rotating shell (11) is made of stainless steel; The rotating shell (11) includes a bottom plate (110), the bottom plate (110) is in a rectangular structure, and a baffle (111) is provided on one side of the bottom plate. The baffle (111) is arranged around the bottom plate (110) to form a U-shaped structure corresponding to the bottom plate (110); A rotating shell shaft (112) is fixedly provided at the center of the other side of the bottom plate (110); the rotating shell shaft (112) is a hollow structure, and one end thereof away from the bottom plate (110) is open; an electromagnet (214) is provided in the rotating shell shaft (112); The transparent shell (10) is sleeved and fixed on the rotating shell (11); A rotating shaft hole (202) is provided at the center of the base plate (20), and the rotating housing shaft (112) is rotatably disposed through the rotating shaft hole (202); The electromagnetic generating unit (2) further includes a rotating mechanism (21); The rotating mechanism (21) is fixedly provided on the rear side of the base plate (20), and the rotating mechanism (21) is rotatably connected to the rotating shaft (112) of the rotating shell; The rotating mechanism (21) comprises a rotating mechanism base (210), the rotating mechanism base (210) being a cubic structure, with a base shaft hole (2100) extending through the middle thereof; an electromagnet bracket (211) being fixedly provided on one side of the rotating mechanism base (210), the electromagnet bracket (211) being an L-shaped structure, with an electromagnet fixing hole (2110) being provided in the middle thereof; the electromagnet fixing hole (2110) being coaxially arranged with the base shaft hole (2100); and the electromagnet (214) being fixedly provided in the electromagnet fixing hole (2110); The rotating shell shaft (112) is rotatably installed in the base shaft hole (2100), and the electromagnet (214) is installed in the rotating shell shaft (112); A spur gear (213) is fixedly sleeved on the rotating housing shaft (112), the spur gear (213) meshes with a worm (2120), the worm (2120) is fixedly connected to the output shaft of the motor (212), and the motor (212) is fixedly arranged on the rotating mechanism base (210); A plurality of core holes (200) are provided through the substrate (20), the core holes (200) corresponding to the planar coil (201), and the core holes (200) are located at the center of the planar coil (201); An iron core is arranged in the core hole (200).

2. The rotary magnetic fluid display device according to claim 1, characterized in that: The planar coil (201) is in the shape of a hairspring and is adhered to the substrate (20); The plurality of planar coils (201) are evenly arranged to form a point array in front of the substrate (20).

3. The rotary magnetic fluid display device according to claim 1, characterized in that: The substrate (20) is a metal aluminum-based copper-clad plate, and the planar coil (201) is made of the copper-clad plate on the substrate (20).

4. The rotary magnetic fluid display device according to claim 1, characterized in that: The control drive unit (22) is fixedly arranged behind the electromagnetic generating unit (2); The electromagnetic generating unit (2) is fixedly arranged on the support frame (3).

5. The rotary magnetic fluid display device according to claim 1, characterized in that: The rotating mechanism base (210) is made of copper.

6. The rotary magnetic fluid display device according to claim 1, characterized in that: The motor (212) is a DC reduction motor.

7. The rotary magnetic fluid display device according to claim 1, characterized in that: The bottom plate (110) is made of a stainless steel plate with a thickness of 0.5-1 mm.

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