AU2017423395A1 - Hole protection structure and device - Google Patents

Abstract

Provided are a hole protection structure and device. The hole protection structure comprises a housing with a hole, and the hole protection structure further comprises at least one group of aligned magnets; the group of aligned magnets comprises at least two magnets located at the edge of the hole; an area outside the housing is divided into a first area and a second area, wherein the first area is the area corresponding to the hole, and the second area deviates from the area corresponding to the hole and is an area located outside the first area; and the at least two magnets in the group of aligned magnets mutually act on each other, so that the magnetic induction intensity in the first area is greater than the magnetic induction intensity in the second area.

Description

HOLE PROTECTION STRUCTURE AND DEVICE

This application claims priority to a Chinese patent application No. 201710556682.8 filed on July 10, 2017, disclosure of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present application relates to the technical field of electronic devices, and in particular, to a hole protection structure and a device.

BACKGROUND

An audio device of a mobile phone and the like may encounter a case where a large amount of iron powder enters a sound hole, which affects an audio effect of a loudspeaker, and an audio channel is blocked in the presence of more magnetic particles, so that a sound of the loudspeaker becomes quite small. The problem that the iron powder enters the mobile phone in an area with rich iron ore is a killer for the mobile phone. In order to protect against the magnetic particles, a general solution is to passively prevent the magnetic particles from entering the sound hole. However, no matter how a dustproof net is thickened, a smaller particle will enter the sound hole, and an audio effect becomes worse over time. Loudness and sound quality are sacrificed while the dustproof net is densed, which is difficult to bear.

In the related art, in order to provide more effective protection, a certain solution is to provide a filter magnet between the sound hole and a voice coil of the loudspeaker, so that the filter magnet attracts the magnetic particles when an air flow caused by movements of a diaphragm passes through the filter magnet. This direct attraction mode has a defect. Since the loudspeaker itself has a magnet which will attract the magnetic particles and the filter magnet increases a magnetic force at a position of the loudspeaker, more magnetic particles are attracted into the audio channel. In addition, the loudspeaker is generally installed inside a product, and the magnetic particles attracted onto the filter magnet cannot be removed. When the product is used in the case that a lot of magnetic particles are existed, a final result of this solution is that too large a number of magnetic particles are attracted onto the filter magnet to block the audio channel, and the sound of the loudspeaker becomes quite small (in fact, the sound of the speaker is not small, but the sound cannot be spread out).

In addition to the mobile phone, other devices with holes which have a requirement for i

BY19EX3028FGPE-AU English translation of PCT/CN2017/117961 protecting against the magnetic particles also have similar problems.

SUMMARY

In view of this, embodiments of the present application provide a hole protection structure and a device to solve at least the problem that it is difficult to protect against magnetic particles.

In a first aspect, an embodiment of the present application provides a hole protection structure, where the hole protection structure further includes at least one group of alignment magnets.

The group of alignment magnets includes at least two magnets disposed at an edge of a hole.

A region outside a housing is divided into a first region and a second region, where the first region is a region corresponding to the hole, and the second region deviates from the region corresponding to the hole and is a peripheral region of the first region.

The at least two magnets in the group of alignment magnets interact with each other such that a magnetic induction intensity of the first region is greater than a magnetic induction intensity of the second region.

In a second aspect, an embodiment of the present application further provides a device including the hole protection structure described above.

The hole protection structure and the device provided by the embodiments of the present invention are provided with the group of alignment magnets at the edge of the hole inside the housing, where the group of alignment magnets includes two or more magnets which interact with each other such that the magnetic induction intensity of the first region directing facing the hole is small due to mutual repulsion between magnets, while in the second region at the periphery of the first region, the magnets generate a magnetic induction intensity of the second region. In this way, if the hole protection structure is located in an environment with magnetic particles, magnetic particles closer to the hole protection structure will be attracted to the first region, and magnetic particles entering the second region will be reduced, thereby reducing the probability that magnetic particles enter the housing through the hole and alleviating a blocking condition of the hole. Therefore, when the hole protection structure is applied to an audio device, the problem of a poor sound output effect caused by blocking is avoided, sound output quality of the audio device is improved, and user experience is improved.

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English translation of PCT/CN2017/117961

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1A is a schematic diagram of a hole protection structure according to embodiment one of the present application;

FIG. IB is a perspective diagram of a hole protection structure according to embodiment one of the present application;

FIG. 1C is a schematic diagram of another hole protection structure according to an embodiment of the present application;

FIG. 2A, FIG. 2B and FIG. 2C are schematic diagrams of three exemplary hole protection structures according to embodiment one of the present application;

FIG. 3A is a schematic diagram illustrating that alignment magnets are disposed inside a housing according to embodiment one of the present application;

FIG. 3B is a schematic diagram illustrating that alignment magnets are embedded in a housing according to embodiment one of the present application;

FIG. 4A and FIG. 4B are two schematic diagrams illustrating that a first magnet and a second magnet among alignment magnets have a same N-S pole direction according to embodiment one of the present application;

FIG. 5A is a schematic diagram of a sound hole protection structure of a loudspeaker according to embodiment two of the present application;

FIG. 5B is a schematic diagram after a polarity reversal of alignment magnets in FIG. 5A;

FIG. 6A is a schematic diagram illustrating that alignment magnets have a same N-S pole direction as a loudspeaker magnet according to embodiment two of the present application;

FIG. 6B is a schematic diagram illustrating that alignment magnets have a reverse N-S pole direction to a loudspeaker magnet according to embodiment two of the present application;

FIG. 7 is a schematic diagram of a hole protection structure of a mobile phone according to embodiment three of the present application; and

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English translation of PCT/CN2017/117961

FIG. 8 is a schematic diagram of a variant of a hole protection structure of a mobile phone according to embodiment three of the present application.

DETAILED DESCRIPTION

The objects, technical solutions and advantages of the present application will be clearer from a detailed description of embodiments of the present application in conjunction with the drawings. It is to be noted that if not in collision, the embodiments and features therein in the present application may be combined with each other.

Embodiment one

This embodiment provides a hole protection structure capable of protecting against magnetic powder. The hole protection structure further includes at least one group of alignment magnets. A group of alignment magnets include at least two magnets disposed at an edge of a hole. A region outside a housing is divided into a first region and a second region, where the first region is a region corresponding to the hole, and the second region deviates from the region corresponding to the hole and is a peripheral region of the first region. The at least two magnets in the group of alignment magnets interact with each other such that a magnetic induction intensity of the first region is greater than a magnetic induction intensity of the second region.

The group of alignment magnets includes at least two magnets (two or more magnets), for example, three magnets.

In the related art, a filter magnet is disposed in an audio channel, and with the increase of magnetic particles, the audio channel will be blocked. If an attraction point is disposed outside a sound hole, attraction of magnetic particles in an air flow cannot be guaranteed. Moreover, the magnetic particles are distributed, stacked and magnetized with respect to each other along magnetic induction lines which are distributed around the magnet from an N pole to an S pole, and the hole is blocked so long as the magnetic particles are close to the hole and pass through the sound hole, which cannot guarantee audio reliability for a long time. This embodiment provides a hole protection structure which, by using an active defense method, guides powder and dust to other places outside the hole and collects particles at a peripheral region outside the hole.

An exemplary hole protection structure in this embodiment, as shown in FIG. 1A (in order to

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English translation of PCT/CN2017/117961 clearly illustrate magnetic induction lines, profile lines on the housing and the alignment magnets are omitted), includes a housing 3 with a hole 1, and further includes one group of alignment magnets, where the group of alignment magnets include a first magnet 21 and a second magnet 22, where the first magnet 21 and the second magnet 22 are disposed on two sides of the hole 1 respectively such that a first region 5 exists on the periphery of the outside of the hole, and magnetic induction lines 4 in the first region 5 are denser than magnetic induction lines 4 at the outside (which refers to a region directly facing the hole outside the hole, that is, a region above the hole 1 in FIG. 1A in the present application) of the hole 1. FIG. IB is a perspective diagram of the hole protection structure. The housing 3 is provided with the hole 1, and the first magnet 21 and the second magnet 22 are disposed inside the housing. The exemplary hole shown in FIG. IB has a cross-section of an elongated rectangle, and the first region 5 is distributed on two sides of the outside of the hole (it is not required in the present application that an entire periphery of the outside of the hole be the first region with dense magnetic induction lines, and the first region with dense magnetic induction lines may exist in a partial region on the periphery of the outside of the hole). Therefore, magnetic particles reaching near the hole 1 will be repelled to regions (shown in dashed lines), which are on two sides of an outer edge of the hole 1 and on a surface of the housing, and be removed easily. In the present application, the outside of the hole and the housing is the outside of the device.

In FIG. 1 A, the denser the magnetic induction lines, the greater the magnetic induction intensity, and therefore the magnetic induction intensity of the first region 5 is greater than that of the region directly facing the hole, so that more magnetic particles will be attracted to the first region 5. As shown in FIG. 1C, a region outside the housing 3 is divided into the first region 5 and the second region 10, where the second region 10 is the region directly facing the hole, and the first region 5 is a region deviating from the hole. The magnetic induction intensity of the first region 5 is greater than the magnetic induction intensity of the second region 10. In this way, when the magnetic particles move towards the hole, under the effect of the greater magnetic induction intensity, the magnetic particles will be attracted to the first region 5, reducing the probability that the magnetic particles enter the second region 10 and preventing the magnetic particles from entering a region inside the housing 3 through the hole 1. In this way, on one hand, the probability that the magnetic particles enter inside the housing 3 is reduced, thereby causing the problem that essential transmission power of the loudspeaker is large due to large sound conduction resistance and a sound sensed by a user is small; on the other hand, the magnetic particles are attracted to the first region of the housing 3, which is also convenient for a user to clear the magnetic particles.

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English translation of PCT/CN2017/117961

Irt some embodiments, the first region 5 is a peripheral region of the second region 10.

In this embodiment, the group of alignment magnets may include one or more magnets, where an end of each magnet closer to the hole 1 has a same polarity. Therefore, the magnetic induction intensity of the first region 5 is small and the magnetic induction intensity of the second region 10 is large due to mutual repulsion of ends of multiple magnets with the same polarity. The magnetic induction intensity here may be an average magnetic induction intensity of a whole region.

The hole in this embodiment is a sound hole designed for a microphone or the loudspeaker, and a corresponding channel is referred to as the audio channel. However, in the present application, the hole in the hole protection structure may implement one or more of a sound output, ventilation, heat dissipation and the like, which is not limited in the application. In fact, the sound hole provided on the housing may also have other functions such as heat dissipation and filtration. The present application does not limit a shape of the hole and the number of holes in the hole protection structure, and the cross-section of the hole may be a rectangle, a circle or other shapes; and a single hole or multiple holes may be included. For example, the hole 1 in the hole protection structure shown in FIG. 2A includes multiple holes arranged in an array, where the multiple holes are used for implementing a same function. In this case, the first magnet 21 and the second magnet 22 may be disposed on two sides of the multiple holes. FIG. 2 only illustrates a form of the hole and a relative position of the hole and the alignment magnets, and for other features of the hole protection structure, reference may be made to FIG. 1A. The cross-section of the hole 1 shown in FIG. 2B is elliptical, and the first magnet 21 and the second magnet 22 are disposed on two sides of the hole 1.

The housing in the hole protection structure may be of various shapes and materials. The alignment magnets in the hole protection structure may be permanent magnets, or may also be electromagnets.

The first magnet in the hole protection structure may be one magnet or may include multiple magnets distributed on a same side, so does the second magnet. If the hole is relatively elongated, the hole protection structure may also be provided with multiple groups of alignment magnets, which is not limited in the application. When the holes have different structures, alignment magnets of different sizes and shapes may be selected to achieve the desired protection effect.

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English translation of PCT/CN2017/117961

The first magnet 21 and the second magnet 22 in FIG. 1A are two independent elements. However, in other embodiments, the first magnet and the second magnet may be integrally formed, that is, are two portions of a whole magnet. That is to say, the alignment magnets are the whole magnet, for example, may be an annular magnet around the periphery of the hole. As shown in FIG. 2C, the cross-section of the hole 1 is a circle, and the first magnet 21 and the second magnet 22 are integrally formed to constitute an annular magnet around the periphery of the hole 1. The annular magnet may also be provided with a hole at a position corresponding to the hole as a channel for air ingress and egress, such as the audio channel. The annular magnet may be complete or may be configured with a notch, such as a U-shaped magnet. The whole magnet may also be embedded in the housing, or installed on an outer or inner side of the housing, or may be installed against the housing or next to the housing with an interval therebetween. In the present application, the first magnet and the second magnet are disposed on the two sides of the hole respectively, which does not indicate that the first magnet and the second magnet must be separated. At other positions outside the hole, the first magnet and the second magnet may be separated, or may be connected together, for example, be integrally formed. If the alignment magnets are the whole annular magnet and the cross-section of the hole is circular or elliptical, the corresponding first region with dense magnetic induction lines will appear as an annular region on the periphery of the outside of the hole.

Although the first magnet 21 and the second magnet 22 in FIG. 1A are disposed inside the housing 3, in the present application, there are a variety of relative positions of the first magnet and the second magnet relative to the housing, and the first magnet and the second magnet may be disposed outside the housing or embedded in the housing. When the alignment magnets are embedded in the housing, the alignment magnets may protrude out of the surface of the housing or may be flush with or recessed into the surface of the housing. For example, for a touch screen mobile phone with a glass cover plate as the housing and a hole disposed on the glass, the alignment magnets are appropriate to be disposed inside the housing, but for a terminal such as an industrial ore walkie-talkie, the alignment magnets may completely be disposed outside the housing or embedded in the housing. FIG. 3A shows an example in which the alignment magnets are disposed inside the housing, the hole 1 is disposed on a left side of the housing 3, two mounting slots are defined above and below the hole respectively, and the first magnet 21 and the second magnet 22 are fixed in the mounting slots through a holder 6. FIG. 3B shows an example in which the alignment magnets are embedded in the housing, the plastic housing 3 is provided with the hole 1, two mounting slots opening outwardly are disposed on two sides of the hole respectively, and the first magnet 21 and the second magnet 22 are fixed in the

BY19EX3028FGPE-AU English translation of PCT/CN2017/117961 mounting slots in a bonding or clamping manner. The alignment magnets may be installed in a various manners, which are not repeated herein. FIG. 4A and FIG. 4B are used for illustrating a manner for arranging the first magnet and the second magnet. In FIG. 4A, the first magnet 21 has a same direction from the north pole to the south pole (abbreviated as N-S pole) as the second magnet 22, and the N-S pole direction is the same as a direction in which the air passes from the outside of the device perpendicularly through a plane where the outer edge of the hole (an edge formed on an outer surface of the housing) is located to the inside of the device. In FIG. 4B, the first magnet 21 has the same N-S pole direction as the second magnet 22, and the N-S pole direction is the same as a direction in which the air passes from the inside of the device perpendicularly through the plane where the outer edge of the hole is located to the outside of the device. In the embodiment of the present application, the N-S pole direction of the magnet refers to a direction of internal magnetic induction lines from the north pole to the south pole (that is, from the N pole to the S pole) of the magnet, and is indicated by an arrow in FIG. 4A and FIG. 4B.

A single magnet has a region with dense magnetic induction lines at edges of its magnetic poles. However, when the two magnets are arranged in a manner of the same N-S pole direction according to this embodiment, as shown in FIG. 1A, magnetic poles of the first magnet and the second magnet with the same polarity are close to each other, and due to a homopolar repulsion effect, the magnetic induction lines offset to the outer sides of the two magnets; meanwhile, since the first magnet and the second magnet are close to each other, most of magnetic induction lines on inner sides of the two magnets are repelled to the outer sides of the two magnets, thereby forming a region with sparse magnetic induction lines outside the hole, and forming the region with dense magnetic induction lines in a partial or entire region on the periphery of the outside of the hole. The magnetic particles have a property of being close to the region with dense magnetic induction lines, so that external magnetic particles moving at a low speed towards the hole will move rapidly to aggregate at the periphery of the outside of the hole under the action of the magnetic induction lines and will not enter the inside of the hole through the hole. Even though there are a large number of magnetic particles that may overwhelm the hole or even the device, a channel free of magnetic particles will be formed at the hole due to repulsion, and the hole will not be blocked. The magnetic particles are concentrated on a surface of the device, which is convenient for the user to manually clear the magnetic particles.

Although this embodiment uses an example in which the two magnets have the same N-S pole direction, a certain angle is allowed to exist between N-S pole directions of the two magnets.

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English translation of PCT/CN2017/117961

The effect of protecting against the magnetic particles can be achieved as long as the region with dense magnetic induction lines with respect to the outside of the hole is formed on the periphery of the outside of the hole. In the present application, this effect is achieved through cooperation of the N-S pole directions of the first magnet and the second magnet, and thus the first magnet and the second magnet are referred to as the group of magnets.

In FIG. 4A, FIG. 4B and FIG. 1, the N-S pole directions of the first magnet 21 and the second magnet 22 are both perpendicular to the plane where the outer edge of the hole is located (indicated by a bolded line in the figure), so that the region with sparse magnetic induction lines formed by the alignment magnets coincides well with the hole and a region directly above the hole, providing better corresponding protection performance. However, a certain angle is also allowed to exist between the N-S pole direction of the first magnet 21 and a perpendicular line of the plane where the outer edge of the hole is located, or between the N-S pole direction of the second magnet 22 and a perpendicular line of the plane where the outer edge of the hole is located.

The hole protection structure in this embodiment can effectively protect against the magnetic particles, and even if an audio device is used in an iron mining region, or a metal machining, manufacturing and smelting industry, the problem that the sound is reduced since a large number of magnetic particles are attracted will not occur, and the problems such as device faults of other devices, especially the audio device, caused by the attraction of magnetic particles, will also be solved.

Embodiment two

This embodiment provides a hole protection structure for a sound hole of a loudspeaker.

The hole protection structure for the sound hole of the loudspeaker in this embodiment is shown in FIG. 5A, and is the same as the hole protection structure shown in FIG. 1 A. A housing 3 is provided with a sound hole 1, a first magnet 21 and a second magnet 22 are disposed on two sides of the sound hole 1, and in this example, the first magnet 21 and the second magnet 22 are disposed on an inner side of the housing 3. Specifically, the hole protection structure for the sound hole in this embodiment is disposed between a loudspeaker 7 and the housing 3. A loudspeaker magnet 71 is disposed in the loudspeaker 7, and the first magnet 21 and the second magnet 22 are disposed above a surface of an N pole of the loudspeaker magnet 71 (if a thickness of the loudspeaker magnet increases towards the N pole, the loudspeaker magnet will

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English translation of PCT/CN2017/117961 be at least in contact with a portion of alignment magnets). One property of magnetic induction lines is that the magnetic induction lines prefer to propagate along a ferromagnetic body. The loudspeaker magnet 71 in the figure is placed in an iron frame 72, so that a large number of magnetic induction lines are concentrated in a gap between the iron frame and magnetic poles, namely a position of coils. In this embodiment, the first magnet 21 and the second magnet 22 are installed on the inner side of the housing 3, a spacer 61 made of a ferromagnetic material is disposed on a face of the first magnet 21 away from the housing 3, and a spacer 62 made of the ferromagnetic material is also disposed on a face of the second magnet 22 away from the housing 3.

The spacer may be a magnetic spacer and has an effect of magnetic isolation. In the embodiment of the present application, the spacer is disposed at least on a surface of the group of alignment magnets away from the hole, so that the group of alignment magnets has a small magnetic field in the housing 3, thereby reducing an abnormality of a magnetic sensitive component disposed in the housing 3 and reducing the problem that part of the magnetic particles may enter the housing 3 due to a large magnetic force in the housing 3.

A cross-section of the spacer is of a linear shape or a step shape, if a first end of a magnet in the group of alignment magnets is in contact with the housing 3, the spacer with the cross-section of the linear line may be disposed at a second end, where the second end is an opposite end of the first end. The spacer with the cross-section of the step shape may wholly cover other surfaces of the magnet except surfaces of the magnet in contact with the housing 3 and closer to the hole, thereby completely isolating the magnetic field generated by the magnet inside the housing 3.

In this embodiment, since the alignment magnets (including the first magnet and the second magnet) are installed directly above the loudspeaker, the alignment magnets will be affected by the loudspeaker magnet. According to a configuration manner in this embodiment, there are two interaction modes, one is that the loudspeaker magnet has a same N-S pole direction as the alignment magnets, as shown in FIG. 5A, and an interchange of N poles and S poles of all the loudspeaker magnet and the alignment magnets in FIG. 5A also belongs to this mode, which is schematically shown in FIG. 6A. The other mode is that the loudspeaker magnet has a reverse N-S pole direction to the alignment magnets, as shown in FIG. 5B, and the interchange of N poles and S poles of all the loudspeaker magnet and the alignment magnets in FIG. 5B also belongs to this mode, which is schematically shown in FIG. 6B. However, no matter which configuration is used, curvature of the magnetic induction lines of the alignment magnets in a protective region outside the sound hole will only be affected to a certain extent and the overall io

BY19EX3028FGPE-AU English translation of PCT/CN2017/117961 distribution of the magnetic induction lines in the region will not be changed, and there is still a region where magnetic induction lines are denser than those outside the sound hole on the periphery of the outside of the sound hole; therefore, the protection against the magnetic particles is not affected.

In this embodiment, the spacer made of the ferromagnetic material is an iron spacer, which can reduce the influence of the alignment magnets on the loudspeaker. The iron spacer may be directly attached to a surface of the alignment magnet towards the loudspeaker, a thickness of only 0.01 mm can enable most of the magnetic induction lines to propagate along the iron spacer, and the iron spacer may also reduce a strength pressure of a flexible structure (for example, plastics). The iron spacer has high bunching efficiency; since an intensity of a spatial magnetic field is inversely proportional to the cube of a distance from a point to a reference magnetic charge, if the influence of the alignment magnets on the loudspeaker needs to be further reduced, only a gap needs to be provided between the iron spacers of the alignment magnets and the loudspeaker, and the influence of the alignment magnets is smaller.

The influence of the alignment magnets on the loudspeaker may be utilized (the spacer may not be provided in this case). As shown in FIG. 5B and FIG. 6B, the loudspeaker magnet has the reverse N-S pole direction to the alignment magnets; under the action of the alignment magnets, magnetic induction lines on an outer side of the iron frame of the loudspeaker magnet are pressed between the iron frame and the magnet due to mutual repulsion, so that a magnetic induction intensity at a position of a loudspeaker voice coil 73 is increased, which can improve electroacoustic transducing efficiency and sensitivity of the loudspeaker. If original sensitivity is maintained, a length of a magnetic induction coil can be reduced, which means that the loudspeaker can be thinner. In addition, a high-quality sound output is roughly a process of hardware design plus software regulation, a digital-to-analog conversion of an audio signal needs to be fitted by software, and a desired audio response can be obtained by adjusting gain coefficients within different frequency ranges according to a frequency response curve practically measured after the alignment magnets are installed.

In this embodiment, the alignment magnets are disposed directly above the loudspeaker, and the interaction between the alignment magnets and the loudspeaker magnet is the strongest, and if the alignment magnets are disposed elsewhere, the interaction will become weaker. If the loudspeaker in this embodiment is replaced with a microphone, and the microphone is also provided with a magnet, a hole protection structure for a sound hole of the microphone will be obtained.

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Embodiment three

This embodiment relates to a mobile phone including the hole protection structure described in embodiment one.

The mobile phone in this embodiment is a smart mobile phone, and the hole protection structure for its sound hole is shown in FIG. 7. A glass cover plate (or a transparent plastic cover plate) serving as a housing 3 is provided with a sound hole 1, and a front trim 31 made of a non-ferromagnetic material is also provided at a position of the sound hole. Two spacers 61 and 62 made of a ferromagnetic material are embedded in a portion of a plastic casing 8 between a loudspeaker 7 and the housing 3. A first magnet 21 and a second magnet 22 are bonded to the two spacers 61 and 62 respectively (which may also be fixed by suction) and then the first magnet 21 and the second magnet 22 are installed on two sides of the hole 1 within the housing 3, a filter screen 32 is further disposed below the hole 1, and a printed board 9 is disposed below the loudspeaker 7 and the plastic casing 8. The sound hole of the smart mobile phone with a glass touch screen is disposed on the glass and it is difficult to make a complex structure on the glass, so the alignment magnets are arranged inside the housing in this embodiment. If the housing is plastic, the alignment magnets may be installed inside or outside the housing or even embedded in the housing. The space of the smart mobile phone in a thickness direction is limited, the embedded spacers can not only isolate the alignment magnets from a loudspeaker magnet but also reinforce the strength of the casing. Same parts of the hole protection structure for the sound hole shown in FIG. 7 and the hole protection structure for the sound hole in embodiment two are not repeated herein.

FIG. 8 is a variant of FIG. 7. In contrast to FIG. 7, the two spacers 61 and 62 in FIG. 8 do not have a simple shape of a linear line and have a zigzag shape with two corners. An end for fixing of the spacer 61 or 62 is embedded in the plastic casing 8, and the other end offsets towards an inner side through the two corners; the first magnet 21 and the second magnet 22 are respectively fixed to the spacers 61 and 62: they may be bonded, or may be directly attracted together through a magnetic force, or a slot for accommodating a magnet or the like is formed by bending an edge of a side of the spacer upwards. The spacer shape in FIG. 8 increases the mounting spaces for the first magnet 21 and the second magnet 22, so that the first magnet 21 and the second magnet 22 can be thicker than the first magnet 21 and the second magnet 22 in FIG. 7. In other embodiments, if the first magnet 21 and the second magnet 22 are integrally formed, the spacers 61 and 62 may be integrally formed, for example, is one iron spacer.

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English translation of PCT/CN2017/117961

Those shown in FIG. 7 and FIG. 8 may also serve as a hole protection structure for a sound hole of a mobile phone receiver.

Other variants of the disclosed embodiments can be understood and implemented by those skilled in the art of the present application to be claimed from the study of the drawings, the 5 disclosure and the appended claims. Some features are recorded in different embodiments or dependent claims, which does not indicate that combinations of these features cannot be used.

INDUSTRIAL APPLIC ABLITY

In the embodiments of the present application, the group of alignment magnets including at least two magnets is disposed within the housing 3, and the magnetic induction intensity of the 10 second region directing facing the hole is smaller than the magnetic induction intensity of the first region due to the interaction of multiple magnets in the group of alignment magnets, so that the magnetic particles close to the hole are attracted to the first region and thus the probability that the magnetic particles enter inside the housing through the second region and the hole is reduced. Therefore, the present application achieves an effect of protecting against the magnetic 15 particles, has positive industrial effects and is simple to implement, so as to be widely applied in the industry.

Claims (14)

1. What is claimed is

   1. A hole protection structure, comprising a housing with a hole; and further comprising at least one group of alignment magnets;

   wherein the group of alignment magnets comprises at least two magnets disposed at an edge of the hole;

   wherein a region outside the housing is divided into a first region and a second region, wherein the first region is a region corresponding to the hole, and the second region deviates from the region corresponding to the hole and is a peripheral region of the first region; and wherein the at least two magnets in the group of alignment magnets interact with each other such that a magnetic induction intensity of the first region is greater than a magnetic induction intensity of the second region.
2. 2. The hole protection structure of claim 1, wherein the group of alignment magnets comprises a first magnet and a second magnet;

   wherein the first magnet and the second magnet are disposed on two sides of the hole respectively.
3. 3. The hole protection structure of claim 2, wherein the first magnet has a same direction from a north pole to a south pole as the second magnet.
4. 4. The hole protection structure of claim 2 or 3, wherein the direction from the north pole to the south pole of the first magnet and the second magnet is perpendicular to a plane where an outer edge of the hole is located.
5. 5. The hole protection structure of claim 2, wherein the first magnet and the second magnet are integrally formed or are independent elements.
6. 6. The hole protection structure of claim 2, wherein the first magnet and the second magnet are installed on an inner side of the housing, and a face of the first magnet away from the housing and a face of the second magnet away from the

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   English translation of PCT/CN2017/117961 housing each are configured with at least one spacer made of a ferromagnetic material.
7. 7. The hole protection structure of claim 2, wherein the first magnet and the second magnet are permanent magnets.
8. 8. The hole protection structure of any one of claims 1 to 3 and 5 to 7, wherein the hole is a sound hole, a heat dissipation hole, a ventilation hole or a filter hole.
9. 9. A device, comprising the hole protection structure of any one of claims 1 to 7.
10. 10. The device of claim 9, wherein the device is an audio device with a loudspeaker and/or a microphone, and the hole protection structure comprises a hole protection structure for a sound hole.
11. 11. The device of claim 10, wherein a hole protection structure for at least one sound hole of the audio device has the following features:

    a first magnet and a second magnet of the hole protection structure are disposed above a surface of a north pole or a south pole of a loudspeaker magnet or a microphone magnet, and a direction from a north pole to a south pole of the first magnet and the second magnet is reversed to a direction from a north pole to a south pole of the loudspeaker magnet or the microphone magnet.
12. 12. The device of claim 10 or 11, wherein the audio device is a mobile phone, and the hole protection structure comprises a hole protection structure for at least one sound hole on a housing of the mobile phone, wherein in the hole protection structure for the at least one sound hole, the first magnet and the second magnet are disposed between the housing of the mobile phone and the loudspeaker or between the housing of the mobile phone and the microphone, and the first magnet and the second magnet are isolated from the loudspeaker or the microphone through a spacer made of a ferromagnetic material.
13. 13. The device of claim 12, wherein the spacer is embedded in a plastic casing inside the housing of the mobile phone, and a

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    English translation of PCT/CN2017/117961 cross-section of the spacer is of a linear shape or a step shape.
14. 14. The device of claim 13, wherein the spacer is used for isolating a magnetic field and covers surfaces of the first magnet and the second magnet away from the sound hole.