CN216719068U - Halbach magnetic assembly and electronic reader - Google Patents

Abstract

The application discloses a Halbach magnetic assembly and an electronic reader, which are applied to the Halbach magnetic assembly, wherein the electronic reader comprises a machine body, a groove body is formed in the side surface of a middle frame of the machine body, and a Halbach array assembly capable of adsorbing an electromagnetic pen is installed in the groove body through more than one group of disassembly structures; this application is through combining halbach array subassembly, effectively strengthens suction, the shielding to the electromagnetic pen to the harm of other equipment, and low in manufacturing cost, save space, makes things convenient for easy dismouting on halbach array subassembly follow the electronic reader through dismantling the structure.

Description

Halbach magnetic assembly and electronic reader

Technical Field

The utility model relates to the technical field of Halbach magnetic attraction, in particular to a Halbach magnetic assembly and an electronic reader.

Background

The magnetic attraction is a bright point of the current electronic products, the novel touch sense can bring different user experiences to consumers, the magnetic attraction field of the tablet personal computer makes great progress, the tablet personal computer is quite mature in the aspects of protective covers, handwriting pens, chargers and the like, and the screen design of the tablet personal computer does not need to consider magnetic field interference, so that the tablet personal computer is simple and many. The electronic paper book is used as a paper-like reader, the electronic paper book particularly refers to an E-ink display technology, an electronic reading product providing similar paper reading feeling needs to be matched with a corresponding magnetic attraction technology, but an electromagnetic film inside the electronic paper book is sensitive to a magnetic field, if the sensed external magnetic field exceeds 2mT, the electromagnetic film can be fed back to a screen, writing is blocked, and shielding of the magnetic field must be considered in the magnetic attraction design.

The electromagnetism pen that supporting use is adsorbed to the subassembly that current market's electronic paper book adopted multistage magnetization mode, but this kind of mode exists the shortcoming lie in: firstly, if the electromagnetic pen is adsorbed by only depending on a single group of multi-pole magnetizing assemblies, the suction force cannot meet the use requirement, and the suction force is weaker; secondly, the attraction can be increased by increasing the polarity of the magnet (for example, four-pole magnetizing is modified into eight-pole magnetizing), but the production cost can be increased, the price of a set of multi-pole magnetizing coil and positioning equipment is thousands to tens of thousands, the price is different, the magnet design cannot be changed, and the set of equipment is only limited to one product for magnetizing and has larger limitation; thirdly, if a single group of magnets is made large, the requirement of magnetic field shielding cannot be met, the electronic paper book and the flat plate are always pursued, the electronic paper book and the flat plate are mainly light and thin, and the internal space is extremely limited, so that if the magnet adsorption area is increased for enhancing the suction force, the residual space is reduced, and the shielding cover does not have enough reserved space, so that the magnetic field cannot be shielded, the electromagnetic screen is interfered, and the electromagnetic screen cannot be normally used; if magnet increases the group number, then the inside space of machine can reduce, and the suction requirement of adsorbing the leather sheath is great, and required magnet group number is more, needs to reserve great space, and increases the magnet group number, greatly increased the required cost of production. Based on this, it is important to design a device that can maximally utilize the magnetism of the magnet in a limited space.

Disclosure of Invention

In view of this, the present invention provides a halbach magnetic assembly and an electronic reader, which effectively enhance the attraction force to an electromagnetic pen, effectively shield damage to other devices, reduce the manufacturing cost, save the space, and facilitate easy detachment of the halbach array assembly from the electronic reader by a detachment structure.

In a first aspect, the utility model discloses a halbach magnet assembly, characterized in that: the magnetic circuit structure comprises at least two adsorption magnets and at least one guide magnet, wherein the adsorption magnets and the guide magnets are alternately distributed, the non-magnetic pole end faces of the adsorption magnets are perpendicular to the magnetic pole end parts of the guide magnets, the magnetic pole orientations of the two adjacent and spaced adsorption magnets are opposite, and magnetic lines of force formed by the adsorption magnets and the guide magnets jointly form a magnetic circuit structure; the adsorption magnet and the guide magnet are detachably arranged in the magnetic separation sheet, only one side of the adsorption magnet and one side of the guide magnet are exposed out of the outer side of the magnetic separation sheet, and the adsorption magnet, the guide magnet, the magnetic separation sheet and the magnetic circuit structure which form a magnetic circuit structure jointly form the Halbach array assembly.

When the adsorption magnets and the guide magnets are specifically arranged, the number of the adsorption magnets is three, and the number of the guide magnets is two.

When specifically setting up above-mentioned magnetism isolating sheet, magnetism isolating sheet includes shielding iron case, shielding iron plate, and adsorption magnet, the direction magnet back that have magnetic structure are dismantled and assembled fixedly in with the shielding iron case, and two shielding iron plates dismantled and assembled are fixed in the both sides of shielding iron case, and dorsal part, the top side dismantled and assembled of shielding iron case are fixed with the shielding iron plate, and shielding iron case, shielding iron plate constitute the supporting body that shields magnetic structure altogether.

When the attracting magnet and the guiding magnet are specifically provided, an angle between the non-magnetic-pole end face of the attracting magnet and the magnetic-pole end portion of the guiding magnet is set to 45 °.

The utility model has the following beneficial effects:

first, this application is through combining halbach array subassembly, effectively strengthens the suction to the electromagnetic pen, effectively shields harm, low in manufacturing cost, the save space to other equipment, and makes things convenient for easy dismouting on the halbach array subassembly follow the electronic reader through dismantling the structure.

Secondly, the halbach array has the highest adsorption force in all magnetic circuit structures, and the suction force of the halbach array is larger than that of multi-pole magnetization under the same volume.

Thirdly, under the requirement of equal suction, the Halbach array can effectively save magnets, in the case of adsorption of the electronic paper book, all the electromagnetic pens are adsorbed in a multi-pole magnetizing mode, two groups of magnets are needed for adsorption, the suction can be ensured, and the suction of the general electromagnetic pens is qualified when the suction reaches 5N; by adopting the Halbach array mode, a group of Halbach array components can reach 5N suction, so that the magnet consumption is reduced by 50%, and the magnet consumption is greatly saved.

Fourthly, the position of the electromagnetic pen of the electronic reader is small, the electromagnetic pen is limited due to the fact that the electronic reader requires the size to be similar to the hand feeling of paper, and the Halbach array can be flexibly designed according to the space in the limited space, so that the advantages can be fully played in the limited space.

Drawings

Fig. 1 is a schematic front view of the attracting magnet and the guiding magnet.

Fig. 2 is a schematic view of the reverse structure of the attracting magnet and the guiding magnet.

Fig. 3 is a schematic structural diagram of a halbach array assembly.

Fig. 4 is a schematic view of the magnetic flux distribution of the halbach array assembly.

FIG. 5 is a schematic view of the magnetic shield.

Fig. 6 is a schematic diagram showing the comparison of the attractive forces at 90 ° and 45 ° angles when the attracting magnet and the guiding magnet are at different intervals.

Fig. 7 is a schematic structural diagram of the electronic reader.

Fig. 8 is a schematic view of the installation structure of the tank body.

Fig. 9 is an assembly structure diagram of the disassembly structure.

Fig. 10 is a schematic view of the use structure of the detaching structure.

Fig. 11 is a schematic view of an assembly structure of the wrench and the chute.

In the figure, an adsorption magnet 1, a guide magnet 2, a shielding iron shell 3, a shielding iron block 4, a shielding iron sheet 5, a middle frame 6, a groove body 7, an electromagnetic pen 8, a wedge-shaped block 9, a side groove 10, a buffer spring 11, a wrench 12 and a sliding groove 13.

Detailed Description

For clear understanding of the technical solution of the present application, a halbach magnetic assembly and an electronic reader provided by the present application will be described in detail below with reference to specific embodiments and accompanying drawings.

The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, such as "one or more", unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" means one, two or more.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

Example 1

Referring to fig. 1 to 5, a specific embodiment of a halbach magnetic assembly in the present application is illustrated, which includes three attracting magnets 1 and two guiding magnets 2, where the attracting magnets 1 and the guiding magnets 2 are alternately arranged, the non-magnetic-pole end faces of the attracting magnets 1 are perpendicular to the magnetic-pole end portions of the guiding magnets 2, and the magnetic poles of two adjacent attracting magnets 1 are opposite in orientation; the three attracting magnets 1 can form a magnetic circuit structure as shown in fig. 1 and fig. 2 under the action of the guiding magnet 2, and magnetic lines of force in the magnetic circuit structure flow from the N pole of one attracting magnet 1 (located inside or outside) to the S pole of the other attracting magnet 1, so that the circulating magnetic lines of force are distributed around the attracting magnet 1 and the guiding magnet 2 all the time. In practical requirements, when one of the objects (for example, the electromagnetic pen 8) is attracted, it is necessary to ensure that the other objects are not affected by magnetic force, for example, when the electromagnetic pen 8 is attracted to the electronic reader by a magnetic attraction method, because an electromagnetic film inside the electronic reader is sensitive to a magnetic field, if an external magnetic field sensed by the electromagnetic film exceeds 2mT, the electromagnetic film is fed back to a screen, and writing of the electronic reader is blocked, so shielding of the magnetic field must be considered in the magnetic attraction design; based on this, referring to fig. 3, magnetic separation sheets are arranged outside the attracting magnet 1 and the guiding magnet 2, and the attracting magnet 1 and the guiding magnet 2 are fixed in the magnetic separation sheets in a detachable manner (in the embodiment, gluing is adopted), the detachable manner is adopted to facilitate subsequent replacement of the attracting magnet 1 and the guiding magnet 2, the fixing is caused by polar repulsion between the attracting magnet 1 and the guiding magnet 2, and if the magnets are not fixed in time, the magnets are popped out of the magnetic separation sheets; and the common side three magnetic poles (N, S, N in one case and S, N, S in the other case) of the three attracting magnets 1 are not shielded by the magnetism isolating sheet, under the influence of the guiding magnet 2 and the magnetism isolating sheet, the magnetic force lines generated by the attracting magnets 1 are as shown in fig. 4, on one hand, the sparse magnetic force lines outside the magnetism isolating sheet become denser due to the action of the guiding magnet 2; on the other hand, due to the influence of the magnetism isolating sheet, most of the magnetic lines of force inside the magnetism isolating sheet enter the magnetism isolating sheet, and further the magnetic lines of force close to the inside of the magnetism isolating sheet in the magnetic structure are loose. Specifically, because the magnetic permeability of the ferromagnetic material is several thousand times greater than that of air, the material of the magnetic shield is preferably pure iron (DT 4), so the magnetic resistance of the magnetic lines of force passing through the air is much greater than that of the ferromagnetic material, most of the magnetic lines of force inside the magnetic shield will pass through the ferromagnetic material wall, and the magnetic flux passing through the inner side of the magnetic shield is extremely small, thereby finally effectively shielding the magnetic field generated by the absorption magnet 1 and the guide magnet 2 in the magnetic shield. Above-mentioned magnetic circuit structure, adsorption magnet 1, direction magnet 2 constitutes halbach array subassembly with the magnetism-isolating sheet jointly, according to actual demand, halbach array subassembly's group number can be designed into the multiunit, design a set of halbach array subassembly in this embodiment, because the special magnetic circuit nature of halbach array subassembly, make adsorption magnet 1 that has magnetic circuit structure, direction magnet 2 only one side can take place adsorption effect, thereby effectively accomplish to adsorb electromagnetic pen 8, and adsorption magnet 1 that has magnetic circuit structure, the magnetic field that the other sides of direction magnet 2 produced all is shielded, from the normal use that does not influence electromagnetic film, avoid receiving the writing that influences and then lead to the electronic reader and receiving the hindrance.

As a further optimization of the embodiment, referring to fig. 5, the magnetic separation sheet includes three parts, namely, a shielding iron case 3, a shielding iron block 4, and a shielding iron sheet 5, during the installation process, glue is firstly added on the back surfaces of the absorption magnet 1 and the guide magnet 2 having the magnetic circuit structure, the absorption magnet 1 and the guide magnet 2 are pressed into the shielding iron case 3 for bonding, then the two shielding iron blocks 4 are arranged on the two sides of the shielding iron case 3 for bonding, the shielding iron sheet 5 is wrapped and bonded on the back side and the top side of the shielding iron case 3, and the shielding iron case 3, the shielding iron block 4, and the shielding iron sheet 5 together form a carrier for shielding the magnetic circuit structure. Five sides with adsorption magnet 1, direction magnet 2 use the supporting body to wrap up, only leak the adsorption plane outward, can reduce the magnetic field of non-working face to 0 to 1mT (if the magnetic field intensity on electromagnetic film surface exceeds 2mT, just can influence the writing of electromagnetic pen 8) to reduce the influence of magnetic field to the electromagnetic film.

Example 2

Example 2 compared to example 1, the improvement is: the included angle between the non-magnetic pole end face of the attracting magnet 1 and the magnetic pole end portion of the guiding magnet 2 is set to be 45 degrees, and the 45 degrees included angle has the advantage over 90 degrees: when the distance between the guide magnet 2 and the adsorption magnet 1 is 1mm, the attraction force of the included angle of 45 degrees is stronger than that of the included angle of 90 degrees; compared with the large distance of more than 1mm, the small distance of 1mm can effectively save space to a certain extent, so that the installation space of the Halbach array assembly on other objects (such as an electronic reader) can be effectively reduced, and obviously, the included angle of 45 degrees is selected to be more advantageous. To prove the above point, when the distance is 1mm, the experimenter measures the suction force generated under the condition of the included angle of 45 degrees and the included angle of 90 degrees respectively, and to improve the accuracy of the data, when the distances are 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm and 8mm respectively, the suction force generated under the condition of the included angle of 45 degrees and the included angle of 90 degrees is measured sequentially, and the specific parameters are as shown in fig. 6, and it can be seen from the figure that when the distance between the adsorption magnet 1 and the guide magnet 2 is the minimum distance of 1mm, the suction force at the included angle of 45 degrees is 86GS, and the suction force at the included angle of 90 degrees is 85.81 GS.

Example 3

Apply one set or the above-mentioned halbach array module of multiunit to electronic reader (e-paper book), and when adsorbing electromagnetism pen 8 through halbach array module, as shown in fig. 7, fig. 8, need at first set up cell body 7 in 6 sides of center of electronic reader organism, halbach module sets up and is used for adsorbing electromagnetism pen 8 in cell body 7, this application is in limited space, furthest utilizes magnet, use unique halbach magnetic circuit design, make suction maximize, it is strong to make this application have suction simultaneously, shielding capacity is strong, low in manufacturing cost, save space. However, when the halbach array module is installed in the tank 7, it is found that, when the halbach array module is fixed to the tank 7 by adhesion, once the halbach array module needs to be replaced or the middle frame 6 needs to be replaced, any one of the halbach array module and the middle frame 6 is damaged by adhesion in a process of peeling the halbach array module from the middle frame 6, and finally, material waste and cost increase are caused. Based on this, in order to conveniently and rapidly disassemble and assemble the halbach array assembly, a disassembly structure is separately developed in this embodiment, as shown in fig. 9, the disassembly structure includes a wedge block 9, an inclined surface of the wedge block 9 faces a notch of the trough body 7, a side groove 10 for the wedge block 9 to horizontally slide is arranged on a side wall of the trough body 7, a buffer spring 11 is connected in the side groove 10, and the buffer spring 11 is connected with the wedge block 9; according to actual requirements, the number of the disassembly structures can be multiple groups (two groups are adopted in the embodiment); when the disassembly structure is used, as shown in fig. 10, as the halbach array assembly presses against the inclined surface of the wedge 9, due to the principle of the wedge 9, the vertical pressing force can be converted into the transverse movement of the wedge 9, so that the wedge 9 is pushed into the side groove 10 until the wedge 9 is completely positioned above the halbach array assembly, the wedge 9 is not pressed by the wedge 9, and the wedge 9 is driven to return to the original position under the deformation force of the buffer spring 11, so that the halbach array assembly is intercepted above the wedge 9; when the disassembly structure needs to be unlocked to release the halbach array assembly, as shown in fig. 11, a wrench 12 is fixed on the wedge block 9, a sliding groove 13 for limiting the movement of the wrench 12 is formed in the side wall of the middle frame 6, the wedge block 9 is moved in the sliding groove 13 through the wrench 12, and therefore the locking of the halbach array assembly by the wedge block 9 is unlocked. This application is through combining the dismantlement structure, realizes the convenient dismouting to halbach array module, and the practicality is stronger to replace original fixed mode through dismantled and assembled mode, appear easily when avoiding changing parts and damage the drawback of other parts, stop extravagant material, reduce use cost's risk.

It should be noted that the electrical equipment related in this embodiment is electrically connected to the power generation device and the controller, which are common in the prior art in the market, and are not described herein again.

Claims (6)

1. A halbach magnetic assembly, comprising: the magnetic circuit structure comprises at least two adsorption magnets (1) and at least one guide magnet (2), wherein the adsorption magnets (1) and the guide magnets (2) are alternately distributed, the non-magnetic pole end faces of the adsorption magnets (1) are perpendicular to the magnetic pole end parts of the guide magnets (2), the magnetic pole orientations of two adjacent and spaced adsorption magnets (1) are opposite, and magnetic lines of force formed by the adsorption magnets (1) and the guide magnets (2) jointly form a magnetic circuit structure; the adsorption magnet (1) and the guide magnet (2) are detachably arranged in the magnetism isolating sheet, only one side of the adsorption magnet (1) and one side of the guide magnet (2) are exposed out of the outside of the magnetism isolating sheet, and the adsorption magnet (1), the guide magnet (2), the magnetism isolating sheet and the magnetic circuit structure which form a magnetic circuit structure jointly form a Halbach array component.

2. The halbach magnet assembly of claim 1, wherein: the number of the adsorption magnets (1) is three, and the number of the guide magnets (2) is two.

3. The halbach magnet assembly of claim 1, wherein: the magnetic separation sheet comprises a shielding iron shell (3), shielding iron blocks (4) and shielding iron sheets (5), wherein the adsorption magnet (1) with a magnetic circuit structure, the back of the guide magnet (2) and the shielding iron shell (3) are detachably fixed, the two shielding iron blocks (4) are detachably fixed on two sides of the shielding iron shell (3), the back side and the top side of the shielding iron shell (3) are detachably fixed with the shielding iron sheets (5), and the shielding iron shell (3), the shielding iron blocks (4) and the shielding iron sheets (5) jointly form a bearing body for shielding the magnetic circuit structure.

4. The halbach magnet assembly of claim 1, wherein: the included angle between the non-magnetic pole end face of the adsorption magnet (1) and the magnetic pole end part of the guide magnet (2) is set to be 45 degrees.

5. An electronic reader, characterized by: the Halbach magnetic assembly applied to any one of claims 1 to 4 comprises a machine body, wherein a groove body (7) is formed in the side face of a middle frame (6) of the machine body, and the Halbach array assembly capable of adsorbing an electromagnetic pen (8) is installed in the groove body (7) through more than one group of disassembly structures.

6. The electronic reader of claim 5, wherein: the disassembly structure comprises a wedge-shaped block (9), the inclined plane of the wedge-shaped block (9) faces the notch of the groove body (7), a side groove (10) for the horizontal sliding of the wedge-shaped block (9) is formed in the side wall of the groove body (7), an elastic piece is connected in the side groove (10), and the elastic piece is connected with the wedge-shaped block (9); the wall surface of the side groove (10) above the wedge block (9) and the wedge block (9) form a cavity capable of accommodating the Halbach array assembly; a wrench (12) is fixed on the wedge-shaped block (9), and a sliding groove (13) for limiting the movement of the wrench (12) is arranged on the side wall of the middle frame (6).

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