A magnetically controlled electric switch device based on particle suspension phenomenon in magnetic fluid

Abstract

The present invention discloses a magnetically controlled electric switch device based on the particle suspension phenomenon in a magnetic fluid, which includes a receiving chamber for holding magnetic fluid and non-magnetic conductive particles, pole plates arranged at intervals on both sides of the receiving chamber, an upper end cover arranged above the receiving chamber, a sawtooth structure block for dispersing the non-magnetic conductive particles is arranged at the bottom of the receiving chamber, and a V-shaped groove structure for guiding the assembly of the non-magnetic conductive particles is arranged at the bottom of the upper end cover. The size of the magnetically controlled electric switch device provided by the present invention can be designed to be extremely small, and it belongs to a microfluidic device, which can solve the demand for switches in the development of micro-electromechanical systems; its control method is non-contact, which can avoid the loss of contact points, increase the life of the switch, and can be used in a variety of special occasions; the switch device has a simple structure, convenient processing, low cost, and high benefits.

Description

Technical Field

[0001] The invention relates to the field of micro-electromechanical systems, and in particular to a magnetically controlled electric switch device based on particle suspension phenomenon in a magnetic fluid. Background Art

[0002] A switch is an electronic component that can interrupt or open the current in a control circuit. A common switch is an electromechanical device that can be operated by humans. It is widely used. Almost all electronic devices are equipped with switches, and the duration of the switch is huge.

[0003] However, common switches are composed of one or more contacts, each of which contains a movable conductor component. When the switch needs to be turned on, the movable conductor component moves to both ends of the contact to turn it on. Due to the above structure, the size of traditional switches is generally large. With the development of micro-electromechanical systems, traditional switches can no longer meet the needs of independent intelligent systems at the micron or even nanometer level.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] The object of the present invention is to provide a magnetically controlled electric switch device that meets the requirements of an independent intelligent system at the micron or even nanometer level.

[0006] The technical solution of the present invention is as follows:

[0007] A magnetically controlled electric switch device based on the particle suspension phenomenon in a magnetic fluid, comprising a containing chamber for containing magnetic fluid and non-magnetic conductive particles, pole plates spaced apart on both sides of the containing chamber, and an upper end cover arranged above the containing chamber, a sawtooth structure block for dispersing the non-magnetic conductive particles being arranged at the bottom of the containing chamber, and a V-shaped groove structure for guiding the assembly of the non-magnetic conductive particles being arranged at the bottom of the upper end cover.

[0008] In the magnetically controlled electric switch device based on the particle suspension phenomenon in the magnetic fluid, the total volume of the non-magnetic conductive particles is smaller than the total volume of the depression of the sawtooth structure block.

[0009] The magnetically controlled electric switch device based on the particle suspension phenomenon in the magnetic fluid, wherein the two sides of the accommodating cavity are symmetrically provided with slots, and the pole plates are correspondingly arranged in the slots.

[0010] The magnetically controlled electric switch device based on the particle suspension phenomenon in the magnetic fluid, wherein both of the two pole plates are provided with threaded holes, and the threaded holes are provided with terminal studs.

[0011] The magnetically controlled electric switch device based on the particle suspension phenomenon in the magnetic fluid, wherein both of the two pole plates are provided with protruding blocks, the upper end cover is provided with two notches adapted to the protruding blocks, and the V-shaped groove structure is arranged at a position between the two notches.

[0012] The magnetically controlled electric switch device based on the particle suspension phenomenon in the magnetic fluid, wherein the top angle of the V-shaped groove structure is less than 45°.

[0013] The magnetically controlled electric switch device based on the particle suspension phenomenon in the magnetic fluid, wherein the sawtooth structure block is orthogonal to the plane of the V-shaped groove structure.

[0014] In the magnetically controlled electric switch device based on the particle suspension phenomenon in the magnetic fluid, a surface modifier for preventing the non-magnetic conductive particles from agglomerating is also arranged in the accommodating cavity.

[0015] In the magnetically controlled electric switch device based on the particle suspension phenomenon in magnetic fluid, the non-magnetic conductive particles are one or more of silver powder, copper powder and carbon nanotube particles.

[0016] The magnetically controlled electric switch device based on the particle suspension phenomenon in the magnetic fluid, wherein the density of the non-magnetic conductive particles is greater than the density of the magnetic fluid.

[0017] Beneficial effects: The magnetically controlled electric switch device based on the particle suspension phenomenon in the magnetic fluid provided by the present invention can be designed to be extremely small in size, and is a microfluidic device that can solve the demand for switches in the development of micro-electromechanical systems; secondly, the control method of the switch device of the present invention is non-contact, and can be used in a variety of special occasions; thirdly, the present invention utilizes the principle of the suspension phenomenon of non-magnetic conductive particles in the magnetic fluid, which is completely different from the solid-solid contact of traditional switches, and can avoid the loss of contact points and increase the life of the switch; finally, the switch device of the present invention has a simple structure, convenient processing, low cost and high profit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the exploded structure from a first perspective of a magnetically controlled electric switch device based on the particle suspension phenomenon in a magnetic fluid according to the present invention.

[0019] Figure 2 This is a schematic diagram of the exploded structure from a second perspective of a magnetically controlled electric switch device based on the particle suspension phenomenon in a magnetic fluid according to the present invention.

[0020] Figure 3 The cross-sectional structure diagram of a magnetically controlled electric switch device based on the particle suspension phenomenon in a magnetic fluid according to the present invention.

[0021] Figure 4The figure is a schematic diagram of the assembly structure of a magnetically controlled electric switch device based on the particle suspension phenomenon in a magnetic fluid according to the present invention. DETAILED DESCRIPTION

[0022] The present invention provides a magnetically controlled electric switch device based on the particle suspension phenomenon in a magnetic fluid. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] See also Figure 1-Figure 4 An embodiment of the present invention provides a magnetically controlled electric switch device based on the particle suspension phenomenon in a magnetic fluid. As shown in the figure, it includes a accommodating chamber 10 for containing magnetic fluid and non-magnetic conductive particles, pole plates 20 arranged at intervals on both sides of the accommodating chamber 10, and an upper end cover 30 arranged above the accommodating chamber 10. A sawtooth structure block 40 for dispersing the non-magnetic conductive particles is arranged at the bottom of the accommodating chamber 10, and a V-groove structure 50 for guiding the assembly of the non-magnetic conductive particles is arranged at the bottom of the upper end cover 30.

[0024] The magnetically controlled electric switch device provided in this embodiment needs to provide a magnetic field through an external controllable magnet to control the on and off of the magnetically controlled electric switch device. The controllable magnet is mainly composed of an electromagnet that can control the on and off of the power supply or a permanent magnet that can change its position. Its fundamental function is to provide a magnetic field, and use the magnetic field to control the movement of the magnetic fluid and non-magnetic conductive particles in the accommodating cavity in a non-contact manner. Specifically, taking the controllable magnet as a permanent magnet as an example, when it is necessary to control the conduction of the magnetically controlled electric switch device, it is necessary to move the permanent magnet to the bottom of the accommodating cavity. At this time, the non-magnetic conductive particles in the accommodating cavity are suspended on the surface of the magnetic fluid under the interaction force between the magnetic fluid and the permanent magnet, and are guided by the V-groove structure 50 at the bottom of the upper end cover 30. They are linearly assembled and evenly distributed between the two pole plates 20, and the non-magnetic conductive particles are in close contact with each other. At this time, the resistance between the two pole plates 20 is small, and the magnetically controlled electric switch device is turned on. When it is necessary to control the electric switch device to disconnect, the permanent magnet needs to be moved away from the bottom of the accommodating cavity. At this time, there is no force between the magnetic fluid in the accommodating cavity and the controllable magnet, and the non-magnetic conductive particles settle in the depression of the sawtooth structure block 40 at the bottom of the accommodating cavity 10. Since the depression of the sawtooth structure block 40 is not filled with the non-magnetic conductive particles, there is no connection between the two pole plates 20. At this time, the magnetically controlled electric switch device is in a disconnected state.

[0025] In some embodiments, the sawtooth structural block 40 is composed of a sawtooth plane, and the main purpose of the sawtooth plane design is to divert the settled non-magnetic conductive particles and let them fall into different troughs (depressions) to avoid contact between the non-magnetic conductive particles, thereby disconnecting the switch. In this embodiment, in order to ensure that when the non-magnetic conductive particles are settled in the depression of the sawtooth structural block 40 at the bottom of the accommodating chamber 10, there is no connection between the two pole plates 20, the total volume of the non-magnetic conductive particles should be smaller than the total volume of the depression of the sawtooth structural block 40, that is, the volume of the concave of the sawtooth plane needs to be greater than the total volume of all non-magnetic conductive particles, and a certain margin is left according to the probability distribution of the landing point of the non-magnetic conductive particles.

[0026] In some embodiments, Figure 1 As shown, the two sides of the accommodating cavity 10 are symmetrically provided with slots 11, and the pole plates 20 are correspondingly arranged in the slots 11; threaded holes 22 are arranged on the two pole plates 20, and terminal studs 21 are arranged in the threaded holes 22. The pole plates are good conductors and are interference-fitted in the overall structure of the switch. The terminal studs 21 can be screwed into the threaded holes 22 of the pole plates 20, and the tightness of the wire can be adjusted according to the number of thread turns. As an example, when wiring is required, loosen the screws of the terminal studs 21, connect the connected wires between the terminal studs 21 and the pole plates 20, and then tighten the screws of the terminal studs 21, which makes wiring more convenient.

[0027] In some embodiments, the magnetic fluid refers to a common mixed solution on the market in which surface-modified nano-scale particles are uniformly dispersed in a water-based or oil-based solution, but is not limited thereto.

[0028] In some embodiments, the non-magnetic conductive particles are particles that can conduct electricity in a similar order of magnitude (e.g., micrometer-level, nanometer-level) or similar substitutes thereof. As an example, the non-magnetic conductive particles are one or more of silver powder, copper powder, and carbon nanotube particles, but are not limited thereto. In this embodiment, the density of the non-magnetic conductive particles is greater than the density of the magnetic fluid. In the initial state, the non-magnetic conductive particles sink and are located at the bottom of the magnetic fluid liquid. When a controllable magnet is applied to the bottom of the accommodating cavity, the force between the magnetic field and the magnetic fluid causes the non-magnetic conductive particles to suspend on the surface of the magnetic fluid liquid. This phenomenon is the suspension phenomenon of particles in the magnetic fluid.

[0029] In some embodiments, the accommodating cavity refers to a sealed channel, and an interference fit method is used at the connection to prevent leakage of magnetic fluid. The accommodating cavity also contains a surface modifier, which is mainly used to modify the surface of non-magnetic conductive particles to prevent them from agglomerating. The surface modifier mainly uses the polar functional groups of the material to generate a certain repulsive force between the non-magnetic conductive particles, thereby avoiding contact agglomeration.

[0030] In some specific embodiments, such as Figure 1 As shown, both of the two pole plates 20 are provided with a protruding block 22, and the upper end cover 30 is provided with two notches 31 adapted to the protruding blocks, and the V-shaped groove structure 50 is arranged at a position between the two notches 31. In this embodiment, the volume of the V-shaped groove structure 50 should be larger than the total volume of the non-magnetic conductive particles in the channel, and the top angle of the V-shaped groove structure 50 should not be too large, and should be less than 45°. The main function of the V-shaped groove structure 50 is to guide the non-magnetic conductive particles to be arranged and assembled in an orderly manner between the two pole plates 20, so that the switch is turned on. As an example, when the non-magnetic conductive particles are suspended on the surface of the magnetic fluid, the non-magnetic conductive particles enter the upper V-shaped groove structure 50 and are guided to be assembled into a conductor connecting the two pole plates. At this time, the switch is turned on. In some specific embodiments, such as Figure 1-2 As shown, the sawtooth structure block is orthogonal to the plane of the V-shaped groove structure.

[0031] In summary, the magnetically controlled electric switch device based on the particle suspension phenomenon in the magnetic fluid provided by the present invention can be designed to be extremely small in size, and belongs to a microfluidic device, which can solve the demand for switches in the development of micro-electromechanical systems; secondly, the control method of the switch device of the present invention is non-contact, which makes the method of controlling the switch more flexible, and the entire circuit structure can be designed to be three-dimensional and multi-faceted, and can be used in a variety of special occasions; thirdly, the present invention utilizes the principle of the suspension phenomenon of non-magnetic conductive particles in the magnetic fluid, which is completely different from the solid-solid contact of traditional switches, and can avoid the loss of contact points and increase the life of the switch; finally, the switch device of the present invention has a simple structure, convenient processing, low cost and high profit.

[0032] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A magnetically controlled electric switch device based on the particle suspension phenomenon in a magnetic fluid, characterized in that: It comprises a containing cavity for containing magnetic fluid and non-magnetic conductive particles, pole plates arranged at intervals on both sides of the containing cavity, and an upper end cover arranged above the containing cavity. A sawtooth structure block for dispersing the non-magnetic conductive particles is arranged at the bottom of the containing cavity, and a V-shaped groove structure for guiding the assembly of the non-magnetic conductive particles is arranged at the bottom of the upper end cover; the total volume of the non-magnetic conductive particles is smaller than the total volume of the depression of the sawtooth structure block; and slots are symmetrically arranged on both sides of the containing cavity, and the pole plates are correspondingly arranged in the slots.

2. The magnetically controlled electric switch device based on the particle suspension phenomenon in magnetic fluid according to claim 1 is characterized in that: The two pole plates are both provided with threaded holes, and the threaded holes are provided with terminal studs.

3. The magnetically controlled electric switch device based on the particle suspension phenomenon in magnetic fluid according to claim 1 is characterized in that: Both of the two pole plates are provided with protruding blocks, the upper end cover is provided with two notches adapted to the protruding blocks, and the V-shaped groove structure is arranged at a position between the two notches.

4. The magnetically controlled electric switch device based on the particle suspension phenomenon in magnetic fluid according to claim 1 is characterized in that: The top angle of the V-shaped groove structure is less than 45°.

5. The magnetically controlled electric switch device based on the particle suspension phenomenon in magnetic fluid according to claim 1 is characterized in that: The sawtooth structure block is orthogonal to the plane of the V-shaped groove structure.

6. The magnetically controlled electric switch device based on the particle suspension phenomenon in magnetic fluid according to claim 1, characterized in that: A surface modifier for preventing the non-magnetic conductive particles from agglomerating is also arranged in the containing cavity.

7. The magnetically controlled electric switch device based on the particle suspension phenomenon in magnetic fluid according to claim 1, characterized in that: The non-magnetic conductive particles are one or more of silver powder, copper powder and carbon nanotube particles.

8. The magnetically controlled electric switch device based on the particle suspension phenomenon in magnetic fluid according to claim 7, characterized in that: The density of the non-magnetic conductive particles is greater than the density of the magnetic fluid.

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