WO2019010924A1

WO2019010924A1 - Hole protection structure and device

Info

Publication number: WO2019010924A1
Application number: PCT/CN2017/117961
Authority: WO
Inventors: 吕东泽
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-07-10
Filing date: 2017-12-22
Publication date: 2019-01-17
Also published as: AU2017423395B2; AU2017423395A1; CN109246558A; CN109246558B

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 equipment

Cross-reference to related applications

The present application is filed on the basis of the Chinese Patent Application No. PCT Application No.

Technical field

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

Background technique

Audio equipment such as mobile phones will encounter a large amount of iron powder drilled into the sound hole, affecting the audio effect of the sound box. In the presence of more magnetic particles, the audio channel will be blocked and the sound of the sound box will be changed. Very small. In the iron-rich mine area, the problem of mobile phone iron powder is the mobile phone killer. In order to protect the magnetic particles, the general scheme is passive to prevent the magnetic particles from entering, but no matter how thick the dust-proof net, there will be smaller particles going in. The cumulative sound effect will deteriorate with time, and the encryption of the air filter at the same time sacrifices the loudness and sound quality, which is unbearable.

In the related art, in order to perform more effective protection, there is a scheme in which a filter magnet is disposed between the sound hole and the voice coil of the speaker, and the airflow caused by the movement of the diaphragm passes through the filter magnet, and the magnetic particles are adsorbed to the filter magnet. This direct adsorption method has defects, because the sounder itself has a magnet, and the magnet will cause adsorption of the magnetic particles, and the filter magnet will cause the magnetic force of the position of the sounder to be strengthened, thereby adsorbing more magnetic particles into the audio channel. Moreover, the general sounders are installed inside the product, and the magnetic particles adsorbed on the filter magnet cannot be removed. Under the conditions of using many magnetic particles, the final result of the solution is that a large amount of magnetic particles are adsorbed at the filter magnet to block the audio channel. The sound of the sounder becomes very small (and the sound of the sounder itself is not small, it just can't be transmitted).

In addition to mobile phones, similar problems exist with other perforated devices that require magnetic particle protection.

Summary of the invention

In view of this, the embodiments of the present application provide a hole protection structure and device, which at least solves the problem of difficulty in protecting magnetic particles.

In a first aspect, an embodiment of the present application provides a hole protection structure, the hole protection structure further comprising at least one set of alignment magnets;

The set of alignment magnets includes at least two magnets at an edge of the aperture;

The area outside the casing is divided into a first area and a second area; wherein the first area is an area corresponding to the hole; the second area is an area corresponding to the hole, and is located at the a peripheral area of a region;

At least two magnets in the set of alignment magnets interact such that the magnetic induction of the first region is greater than the magnetic induction of the second region.

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

The hole protection structure and device provided by the embodiment of the invention are provided with a group of alignment magnets at the edge of the hole in the outer casing, the group of alignment magnets comprising two or more magnets, and the magnets interact with each other such that the holes are facing each other The first region of the first region is magnetically weak due to mutual repulsion between the magnets, and the second region at the periphery of the first region, the magnet generates a magnetic induction intensity higher than that of the second region, so that the hole protection structure is located at the magnetic particle In the environment, the magnetic particles close to the hole protection structure are adsorbed by the first region, and the magnetic particles entering the second region are reduced, thereby reducing the probability that the magnetic particles enter the outer casing through the hole, thereby reducing the hole. The congestion condition is thus cited in the audio device, thereby avoiding the problem of poor audio output caused by congestion, thereby improving the sound quality of the audio device and improving the user experience.

DRAWINGS

FIG. 1A is a schematic diagram of a hole protection structure provided in Embodiment 1 of the present application.

FIG. 1B is a perspective view of a hole protection structure according to Embodiment 1 of the present application.

FIG. 1C is a schematic diagram of another hole protection structure provided by an embodiment of the present application.

2A, 2B, and 2C are schematic views of three exemplary hole protection structures provided in Embodiment 1 of the present application.

FIG. 3A is a schematic view showing the alignment magnet provided in the first embodiment of the present application.

FIG. 3B is a schematic view of the alignment magnet provided in the first embodiment of the present application.

4A and FIG. 4B are two schematic views showing the same direction of the N-S poles of the first magnet and the second magnet in the alignment magnet according to the first embodiment of the present application.

FIG. 5A is a schematic diagram of a sound hole protection structure of a speaker provided in Embodiment 2 of the present application.

Fig. 5B is a schematic view showing the reverse polarity of the alignment magnet of Fig. 5A.

FIG. 6A is a schematic view showing the alignment magnet and the speaker magnet in the N-S pole direction of the second embodiment of the present application.

FIG. 6B is a schematic view showing the opposite direction of the N-S pole of the alignment magnet and the speaker magnet according to the second embodiment of the present application.

FIG. 7 is a schematic diagram of a cell phone hole protection structure provided in Embodiment 3 of the present application.

FIG. 8 is a schematic diagram of a variation of the cell phone hole protection structure provided in Embodiment 3 of the present application.

Detailed ways

In order to make the objects, technical solutions and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

Embodiment 1

This embodiment provides a hole protection structure that can protect magnetic powder. The hole protection structure further includes at least one set of alignment magnets; the set of alignment magnets includes at least two magnets at an edge of the aperture; a region outside the housing is divided into a first region and a second region; wherein a first region is a region corresponding to the hole; the second region is a region corresponding to the hole, and is located at a peripheral region of the first region; at least two magnets in the group of matching magnets interact, such that The magnetic induction of the first region is greater than the magnetic induction of the second region.

The set of alignment magnets includes at least two or more magnets, for example, three magnets or the like.

The related art places the filter magnet in the audio channel, and as the magnetic particles increase, the audio channel is blocked. If the adsorption point is placed outside the sound hole, the adsorption of magnetic particles in the airflow cannot be ensured, and since the magnetic particles are distributed along the magnetic line and magnetized to each other, the magnetic line is distributed from N to S around the magnet, as long as Close to the hole through the sound hole will cause blockage in the hole, and the audio reliability cannot be guaranteed for a long time. This embodiment proposes a hole protection structure, which adopts an active defense method to guide dust to other places outside the hole, and collects particles in the outer peripheral area of the hole.

An exemplary hole protection structure of the present embodiment is shown in FIG. 1A (to clearly show the magnetic induction line, omitting the section line on the outer casing and the alignment magnet), including the outer casing 3 with the hole 1, and a set of alignment a magnet, the set of alignment magnets includes a first magnet 21 and a second magnet 22, the first magnet 21 and the second magnet 22 are respectively disposed on both sides of the hole 1, and the first periphery of the hole has a first periphery In the region 5, the magnetic line 4 of the first region 5 is denser than the magnetic line 4 of the outside of the hole 1 (the area of the hole facing the hole outside the hole, above the hole 1 in the figure). Fig. 1B is a perspective view of the hole protection structure, the hole 1 is opened on the outer casing 3, and the first magnet 21 and the second magnet 22 are disposed in the outer casing. The cross-section of the hole as an example of FIG. 1B is an elongated rectangle, and the first region 5 is distributed on both sides of the outside of the hole (this application does not require that the periphery of the outside of the hole is all the first region where the magnetic line is dense, and may be in the hole A portion of the outer periphery has a first region where the magnetic lines are dense. Thus the magnetic particles reaching the vicinity of the hole 1 will be repelled to the surface area of the outer surface of both sides of the outer edge of the hole 1 (as indicated by the dashed line) for easy removal. In the present application, the outside of the hole and the outer casing is the outside of the device.

In Fig. 1A, the denser the magnetic induction line is, the stronger the magnetic induction is, so that the magnetic induction in the first region 5 is larger than the region in which the hole is directly opposed, so that the magnetic particles are more adsorbed to the first region 5. As shown in FIG. 1C, the outer region of the outer casing 3 is divided into a first region 5 and a second region 10, and the second 10 region is a region directly facing the hole, and the first region 5 is offset. The area of the hole. The magnetic induction of the first region 5 is greater than the magnetic induction of the second region 10. Thus, if the magnetic particles are close to each other, they are adsorbed into the first region 5 under the action of stronger magnetic induction, which reduces the probability of the magnetic particles entering the second region 10, thereby reducing the entry of the magnetic particles through the hole 1. To the area inside the outer casing 3. Thus, on the one hand, the magnetic particles reduce the probability of entering into the outer casing 3, resulting in a large transmission power of the speaker, which causes a substantial transmission power of the speaker but a small sound sensed by the user, and on the other hand, the magnetic particles are adsorbed to the outer casing. The first area of 3 is also easy for users to clean up.

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

In this embodiment, the set of alignment magnets may include: one or more magnets, one end of the magnets adjacent to the hole 1 is magnetic with the same polarity, thus, due to the same magnetic section of the plurality of magnets The mutual repelling causes the magnetic induction of the first region 5 to be low, and the magnetic induction of the second region 10 to be large. The magnetic induction here can be the average magnetic induction of the entire area.

The hole of this embodiment is a sound hole designed for a microphone or a speaker, and the corresponding channel is called an audio channel, but for the present application, the hole in the hole protection structure can realize one of the functions of sounding, ventilation, heat dissipation and the like. There are many or more types, and this application does not limit this. In fact, the sound hole provided on the outer casing can also have other functions such as heat dissipation and filtration. The present application does not limit the shape and number of holes in the hole protection structure. The cross section of the holes may be rectangular or circular or other shapes; it may be a single hole or a plurality of holes. For example, the aperture 1 in the aperture protection structure shown in Figure 2A includes a plurality of apertures arranged in an array for achieving a common function. At this time, the first magnet 21 and the second magnet 22 may be disposed on both sides of the plurality of holes. Only the form of the aperture and the relative position of the aperture to the alignment magnet are shown in Figure 2, and other features in the aperture protection structure can be seen in Figure 1A. The hole 1 shown in Fig. 2B has an elliptical cross section, and the first magnet 21 and the second magnet 22 are disposed on both sides thereof.

The outer casing in the hole protection structure can be of various shapes and materials. The alignment magnet in the hole protection structure may be a permanent magnet or an electromagnet.

The first magnet in the hole protection structure may be a magnet or a plurality of magnets distributed on the same side, as is the second magnet. If the holes are relatively long, the hole protection structure can also be provided with a plurality of sets of alignment magnets, which is not limited in this application. When the structure of the holes is different, the desired protective effect can be obtained by selecting the aligning magnets of different sizes and shapes.

The first magnet 21 and the second magnet 22 in Fig. 1A are two separate elements, but in other embodiments, the first magnet and the second magnet may also be integrally formed, that is, two parts of the whole magnet. . That is to say, the alignment magnet is the monolithic magnet, such as a ring magnet surrounding the periphery of the hole. The hole 1 shown in Fig. 2C has a circular cross section, and the first magnet and the

second magnet

21, 22 are integrally formed to constitute a ring magnet surrounding the periphery of the hole 1. The ring magnet should also have a hole in the position corresponding to the hole as a passage for gas in and out, such as an audio channel. The ring magnet may be integral or may have a notch such as a U-shaped magnet. The monolithic magnet can also be mounted in the outer casing or mounted on the outside or inside of the outer casing, and can be mounted close to the outer casing or left at intervals. The first magnet and the second magnet of the present application are respectively disposed on both sides of the hole, and does not mean that the first magnet and the second magnet must be separated. In other positions than the hole, the first magnet and the second magnet may be separated. They can also be joined together as one piece. If the alignment magnet is a ring-shaped monolithic magnet and the cross-section of the aperture is circular or elliptical, the corresponding first region of dense magnetic line will appear as an annular region around the outer periphery of the aperture.

Although the first magnet 21 and the second magnet 22 of FIG. 1A are located in the outer casing 3, for the present application, the first magnet and the second magnet have a plurality of relative positions to the outer casing, and may be located outside the outer casing or embedded in the outer casing. In the outer casing. When embedded in the housing, the alignment magnet may protrude from the surface of the housing or may be flush with or recessed within the surface of the housing. For example, for a touch screen mobile phone with a glass cover as a casing and a hole in the glass, it is suitable to arrange the alignment magnet in the outer casing, but for a terminal such as an industrial walkie-talkie, it can be completely installed outside the outer casing or embedded in the outer casing. 3A is an example in which an alignment magnet is disposed in a casing, and a hole 1 is formed in a left side of the casing 3, and a mounting groove is provided in each of the upper and lower holes, and the first magnet 21 and the second magnet 22 are fixed to the mounting by the bracket 6. Inside the slot. FIG. 3B is an example in which the alignment magnet is embedded in the outer casing. The plastic outer casing 3 is provided with a hole 1 provided with two outwardly opening mounting grooves on both sides of the hole, and the first magnet 21 and the second magnet 22 are bonded or The snap connection is fixed in the mounting slot. There are many installation methods for the alignment magnet, which will not be described here.

4A and 4B are diagrams showing the arrangement of the first magnet and the second magnet. In Fig. 4A, the north pole to the south pole (abbreviated as NS pole) of the first magnet 21 and the second magnet 22 have the same direction, and the outer edge of the hole (the edge formed on the outer surface of the outer casing) is perpendicular to the gas from the outside of the apparatus. The plane enters the inside of the device in the same direction. In FIG. 4B, the first magnet 21 and the second magnet 22 have the same N-S pole direction and coincide with the direction in which the gas passes perpendicularly from the inside of the device through the plane of the outer edge of the hole to the outside of the device. In the embodiment of the present application, the N-S pole direction of the magnet refers to the direction of the internal magnetic line from the north pole to the south pole (ie, the N pole to the S pole) of the magnet, and is indicated by the arrow direction in FIGS. 4A and 4B.

The magnetic induction line of a single magnet is densely packed at the edge of the magnetic pole, and when the two magnets are arranged in the same manner in the NS pole direction according to the embodiment, referring to FIG. 1A, the same polarity of the first magnet and the second magnet are Together, due to the action of the same polarity repulsive, the magnetic induction line is shifted to the outside of the two magnets, and since the first magnet and the second magnet are close to each other, the magnetic induction lines in the inner regions of the two magnetic blocks are mostly repelled to the outside. Thereby, a magnetic line thinning region is formed outside the hole, and a magnetic line dense region is formed in a part or the whole of the outer periphery of the hole. The magnetic particles have a characteristic of being close to the magnetic sensitive line dense region, and therefore the foreign magnetic particles moving at a low speed toward the hole rapidly move to the outer periphery of the hole under the action of the magnetic induction line, and do not pass through the hole to perform the inside of the device. Even if a large number of magnetic particles can be submerged in the holes or even the device, a channel of non-magnetic particles is formed at the holes due to repulsion. There will be no blockage of the holes. Since the magnetic particles are concentrated on the surface of the device, it is easy for the user to remove it by hand.

Although the present embodiment is exemplified by the same N-S pole directions of the two magnets, it is also permissible to have a certain angle between the N-S pole directions of the two magnets. The effect of protecting the magnetic particles can be achieved as long as a magnetic sensitive line dense region outside the hole can be formed at the periphery of the outside of the hole. This application achieves this effect by the mutual matching 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 a set of alignment magnets.

In FIGS. 4A, 4B and FIG. 1, the NS pole directions of the first magnet 21 and the second magnet 22 are both perpendicular to the plane of the outer edge of the hole (indicated by a thick line in the drawing), so that the magnetic body formed by the alignment magnet The sparse area of the sense line coincides well with the hole and the area directly above it, and the corresponding protective performance is also better, but the NS pole direction of the first magnet 21 and the second magnet 22 and the perpendicular line of the plane of the outer edge of the hole have A certain angle is also allowed.

The hole protection structure of the embodiment can effectively protect the magnetic particles, and even in the use of the audio equipment in the iron ore region and the metal processing and manufacturing smelting industry, the sound reduction caused by the adsorption of a large amount of magnetic particles does not occur, and the problem can also be solved. Other equipment, especially audio equipment, has problems such as equipment failure due to adsorption of magnetic particles.

Embodiment 2

The embodiment provides a hole protection structure for the sound hole of the speaker.

The hole protection structure of the sound hole of the speaker of this embodiment is as shown in FIG. 5A, and the hole protection structure is the same as the hole protection structure shown in FIG. 1A. A sound hole 1 is formed in the outer casing 3, and the first magnet 21 and the second magnet 22 are disposed on both sides of the sound hole 1, in this example, on the inner side of the outer casing 3. In particular, the hole protection structure of the sound hole of the present embodiment is disposed between the speaker 7 and the outer casing 3. The speaker magnet 71 is present in the speaker 7, and the first magnet 21 and the second magnet 22 are located above the N-pole surface of the speaker magnet 71 (if the thickness of the speaker magnet increases in the N-pole direction, at least the touch portion is aligned to the magnet) . One property of the magnetic induction line is that it prefers to propagate along the ferromagnetic body. The speaker magnet 71 in the figure is placed in an iron frame 72, so that a large number of magnetic lines are concentrated in the gap between the iron frame and the magnetic pole, that is, the coil is located. s position. In this embodiment, the first magnet 21 and the second magnet 22 are mounted on the inner side of the outer casing 3, and a spacer 61 made of a ferromagnetic material is disposed on a side of the first magnet 21 away from the outer casing 3, and the second magnet 22 is away from the outer casing 3 The side is also provided with a spacer 62 made of a ferromagnetic material.

The spacer may be a magnetic isolation plate and has magnetic isolation. In the embodiment of the present application, the spacer is located at least on a surface of the group of alignment magnets away from the hole, so that the magnetic field itself is small in the outer casing 3. Thereby, the abnormality of the magnetic sensitive device provided in the outer casing 3 and the large magnetic property in the outer casing 3 are caused by the fact that a part of the magnetic particles can enter.

The cross section of the spacer may be in a shape of a line or a step. If the magnet in the pair of matching magnets is in contact with the outer casing 3 with the first end, the spacer having a cross section of a shape may be disposed at the second end. The second end is the opposite end of the first end. If the cross-section is stepped, the spacer can cover the other surface of the magnet 3 in contact with and close to the hole, thereby completely isolating the magnet from the inner region of the outer casing 3. The generation of a magnetic field.

In the present embodiment, since the alignment magnets (including the first magnet and the second magnet) are mounted directly above the speaker, they are subjected to the action of the speaker magnet. According to the configuration of the embodiment, there are two modes of mutual influence, one is that the NS pole direction of the speaker magnet and the aligning magnet are the same, as shown in FIG. 5A, the N pole and S of the speaker magnet and the aligning magnet of FIG. 5A are shown. Extremely all interchanges also belong to this mode, and its schematic diagram is shown in Figure 6A. One is that the N-S poles of the speaker magnet and the aligning magnet are opposite in direction. As shown in FIG. 5B, the N and S poles of the speaker magnet and the aligning magnet in FIG. 5B are all interchanged, and the schematic diagram is shown in FIG. 6B. However, regardless of the configuration, the curvature of the magnetic induction line of the alignment magnet in the outer protection zone of the sound hole is only affected to some extent, and the overall distribution of the magnetic induction line in the area is not changed, and the magnetic sense is still present outside the sound hole. The line is denser than the outside of the sound hole and thus does not affect the protection of the magnetic particles.

The spacer made of the ferromagnetic material of the embodiment is an iron piece, which can reduce the influence of the alignment magnet on the speaker, and the iron piece can be directly attached to the surface of the alignment magnet facing the speaker, even if only 0.01 mm thick, most of the The magnetic induction line propagates along the iron piece, and the presence of this piece of iron can also reduce the strength and pressure of the flexible structure (such as plastic). The gathering efficiency of the iron piece is very high. Since the strength of the space magnetic field is inversely proportional to the distance from the point to the reference magnetic charge, if it is necessary to further reduce the influence of the alignment magnet on the speaker, it is only necessary to leave between the iron piece of the alignment magnet and the speaker. With a gap, the effect of the alignment magnet is even smaller.

The effect of the alignment magnet on the speaker can be utilized (the spacer can be eliminated at this time). As shown in FIG. 5B and FIG. 6B, the NS poles of the speaker magnet and the aligning magnet are opposite in direction, and under the action of the aligning magnet, the magnetic susceptibility line outside the speaker magnet iron frame is pressed between the iron frame and the magnet under the repulsive action. The magnetic induction intensity at the speaker voice coil 73 is increased, which can improve the electroacoustic transduction efficiency and sensitivity of the speaker. If the original sensitivity is maintained, the length of the magnetic induction coil can be reduced. This means that the speaker can be made thinner. In addition, the high-quality sound output is roughly a process of hardware design plus software adjustment. When the digital signal is converted, the software needs to be fitted by software. By actually measuring the frequency response curve of the matching magnet after installation, the gain coefficient of different frequency intervals is adjusted. You can get the audio response you need.

In this embodiment, the alignment magnet is disposed directly above the speaker, and the interaction between the two is maximized, and if it is disposed elsewhere, the interaction becomes smaller. The speaker of this embodiment is replaced with a microphone, and the microphone also has a magnet, which will obtain a hole protection structure for the sound hole of the microphone.

Embodiment 3

This embodiment relates to a mobile phone including the hole protection structure of the first embodiment.

The mobile phone of this embodiment is a smart phone, and the hole protection structure of the sound hole is as shown in FIG. 7. A sound hole 1 is formed in the outer casing 3 which serves as a glass cover (or a transparent plastic cover), and a front decorative member 31 of a non-ferromagnetic material is further provided at the sound hole. Two

spacers

61 and 62 made of ferromagnetic material are embedded in a portion of the plastic casing 8 between the speaker 7 and the outer casing 3. The first magnet 21 and the second magnet 22 are respectively bonded to the two spacers 61 and 62 (may also be suction-fixed by suction), and then mounted on both sides of the inner hole 1 of the outer casing 3, and a filter 32 is further disposed below the hole 1. Under the speaker 7 and the plastic housing 8, there is a printed board 9.

Since the sound hole of the smartphone of the glass touch screen is opened on the glass, it is difficult to make a complicated structure on the glass, and thus the embodiment provides the alignment magnet in the casing. If the outer casing is plastic, the alignment magnet can be mounted inside and outside the outer casing or even embedded. The space of the smartphone in the thickness direction is limited. In addition to the isolation function of the alignment magnet and the speaker magnet, the embedded spacer can also reinforce the strength of the housing. The hole protection structure of the sound hole shown in FIG. 7 is the same as the hole protection structure of the sound hole of the second embodiment, and the description thereof will not be repeated.

Figure 8 is a variant of Figure 7, which differs from Figure 7 in that the two

spacers

61, 62 of Figure 8 are no longer a simple "-" shape, but also have two corners.

a shape, one end of the

spacers

61, 62 for fixing is embedded in the plastic housing 8, and the other ends of the two corners are offset inward by the two corners, and the first magnet 21 and the second magnet 22 are fixed to the

spacers

61, 62, respectively. It may be bonding, or it may be directly adsorbed by magnetic force, or the edge of one side of the spacer may be bent to form a groove for accommodating the magnet or the like. The shape of the spacer in Fig. 8 increases the installation space of the first magnet 21 and the second magnet 22, and the first magnet 21 and the second magnet 22 can be made thicker with respect to Fig. 7. In other embodiments, if the first magnet 21 and the second magnet 22 are integrally formed, the

spacers

61, 62 may be integrally formed as a piece of iron.

7 and 8 can also be used as a hole protection structure for the sound hole of the handset.

Other variations to the disclosed embodiments can be understood and effected by those skilled in the <RTIgt; Certain features are recited in different embodiments or the dependent claims and are not intended to

Industrial applicability

In the embodiment of the present application, a set of alignment magnets including at least two magnets is disposed in the outer casing 3, and the magnetic induction intensity of the second region facing the holes is lower than the first one by the interaction of the plurality of magnets in the pair of magnets. The magnetic induction intensity of the region, so that the magnetic particles close to the hole are adsorbed by the first region, and the probability of entering the outer casing through the second region and the hole is reduced, so that the magnetic particulate matter can be protected and has a positive industrial effect. It is simple to implement and can be widely used in industry.

Claims

A hole protection structure comprising: an outer casing with a hole,

The hole protection structure further includes at least one set of alignment magnets;

The set of alignment magnets includes at least two magnets at an edge of the aperture;

The area outside the casing is divided into a first area and a second area; wherein the first area is an area corresponding to the hole; the second area is an area corresponding to the hole, and is located at the a peripheral area of a region;

At least two magnets in the set of alignment magnets interact such that the magnetic induction of the first region is greater than the magnetic induction of the second region.
The hole protection structure according to claim 1, wherein

The set of alignment magnets includes: a first magnet and a second magnet,

The first magnet and the second magnet are respectively disposed on both sides of the hole.
The hole protection structure according to claim 2, wherein

The first magnet and the second magnet have the same north pole to south pole direction.
The hole protection structure according to claim 2 or 3, wherein

The north pole to south pole direction of the first magnet and the second magnet are perpendicular to a plane in which the outer edge of the hole is located.
The hole protection structure according to claim 2, wherein

The first magnet and the second magnet are integrally formed or are separate components.
The hole protection structure according to claim 2, wherein

The first magnet and the second magnet are mounted on an inner side of the outer casing, and at least one spacer made of a ferromagnetic material is disposed on a side of the first magnet and the second magnet away from the outer casing.
The hole protection structure according to claim 2, wherein

The first magnet and the second magnet are both permanent magnets.
The hole protection structure according to any one of claims 1 to 3, 5 to 7, wherein

The hole is: a sound hole, or a heat dissipation hole, or a vent hole, or a filter hole.
An apparatus comprising the hole protection structure of any one of claims 1 to 7.
The apparatus according to claim 9, wherein

The device is an audio device with a speaker and/or a microphone, the hole protection structure comprising a hole protection structure for the sound hole.
The apparatus of claim 10, wherein

The hole protection structure of the at least one sound hole of the audio device has the following feature: the first magnet and the second magnet of the hole protection structure are located above the north or south pole surface of the speaker magnet or the microphone magnet, and the first The north pole to south pole direction of the magnet and the second magnet are opposite to the north pole to south pole direction of the speaker magnet or the microphone magnet.
The apparatus according to claim 10 or 11, wherein

The audio device is a mobile phone, and the hole protection structure comprises a hole protection structure of at least one sound hole on the outer casing of the mobile phone, and the first magnet and the second magnet in the hole protection structure of the at least one sound hole are disposed at the Between the phone case and the speaker or microphone, and the first magnet and the second magnet are separated from the speaker or microphone by a spacer made of a ferromagnetic material.
The apparatus of claim 12, wherein

The spacer is embedded in a plastic housing in the outer casing of the mobile phone, and the cross section of the spacer is in a shape of a line or a step.
The apparatus of claim 13 wherein

The spacer is for isolating a magnetic field covering a surface of the first magnet and the second magnet away from the sound hole.