KR101942712B1 - Metal frame transmitting the electormagnetic wave or having the function of heat radiation - Google Patents

Abstract

The present invention provides a metal frame allowing electromagnetic waves to penetrate the same or having a heat radiation property. The metal frame has a metal as its main component. The metal frame is applied to a device having an electromagnetic wave penetration function. A slit is formed on at least a portion of the frame to allow normal operation of the device by giving an electromagnetic wave penetration property to the metal frame. An area where the slit is formed is larger than the area occupied by a wireless transceiving module for electromagnetic wave penetration. The entire area occupied by the wireless transceiving module is positioned in at least a portion of the area where the slit is formed. The slit is formed on at least a portion of the metal frame. The entire area of the wireless transceiving module is overlapped in the area of the slit to give an electromagnetic wave penetration property to the metal frame. Therefore, the metal frame can be used for an outer case or an interior material of a device having a transceiving module for wireless communication or wireless charging.

Description

[0001] The present invention relates to a metal frame for transmitting electromagnetic waves,

The present invention relates to a metal frame capable of transmitting radio waves or having heat dissipation characteristics, and more particularly, a metal frame capable of transmitting radio waves or having a heat dissipation property, A slit of a predetermined width may be formed and used as an external case of an apparatus having at least one associated wireless transmission / reception module selected from a near field wireless communication (NFC), a wireless power transmission, and a mobile payment means. However, since the generation of the vortex (eddy current) interferes with the transmission of the radio wave, it is very important to establish a condition in which the vortex is not generated. For this purpose, the region where the slit is formed must be larger than the size .

[0002] Recently, wireless charging technology has been rapidly developing, and such wireless charging technology has been widely applied to mobile phones as well as various living apparatuses.

Wireless charging is also referred to as non-contact charging, largely divided into the use of electromagnetic induction and the use of self-resonance.

The electromagnetic induction type charging technology is a method of charging the battery while the charging coil and the two coils inside the portable telephone cause the induction current. The self resonance type is a method of charging by sending power at the same frequency to the transmitting and receiving end which is several meters away Among them, the electromagnetic induction method is the most widely used technology, and it is possible to use a frequency of several hundreds of kHz, so that it is possible to charge mobile phones, laptops, and mobile devices using frequencies of 100 to 300 kHz, It is possible to charge the car.

On the other hand, manufacturers of mobile devices such as mobile phones have been steadily developing technologies aimed at maximizing the performance of the device. As a result, the technology has been made more advanced, and the device is gradually getting closer to the improvement of the device performance. It is getting more and more difficult to differentiate.

Therefore, the importance of the design element becomes greater than before, and the choice of the frame material that forms the appearance of the apparatus becomes an important topic.

In other words, although mobile devices that adopt the appearance of plastic material have been mainly made for the purpose of lightening up to now, there has been a limit in achieving the high quality of the textures by the plastic, and accordingly, a substitute material However, it is not easy in reality.

The appearance of the metal is considered to be the best candidate among the candidates to replace the plastic appearance. However, since metal has shielding ability against radio waves and is actually used as an excellent shielding material, And the like.

Accordingly, it is desirable that a substitute material which can improve the external aesthetic appearance by replacing the plastic as an outer case of a mobile device is desired, and it is highly desirable that a metal frame is adopted but the wireless transmission / reception module can be smoothly operated despite the metal frame .

In addition, the heat dissipation characteristic of the metal is superior to that of any material, and it is more preferable that the heat dissipation characteristics can be improved while ensuring the operation of the various wireless transmission / reception modules described above.

Korea Patent Publication No. 2014-0008130 Korea Patent Publication No. 2014-0008273 Korea Patent Publication No. 2014-0104242 Korea Patent Publication No. 2014-0113147

"Design of Miniature CPW Feed Slot Antenna Using Split Ring Resonator", Journal of the Korean Institute of Information and Communication Engineers Volume 18, Issue 10, p2351 ~ 2358, 31 Oct 2014 (http://central.oak.go.kr/journallist /journaldetail.do;jsessionid=E4FE5E83B5B811E6E3025D752C9557C7?article_seq=14937&tabname=abst&resource_seq=-1&keywords=null)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a metal frame, A slit is formed at a position of the coil forming region, and a slit is formed in a region larger than the coil forming region, so that at least a radio wave transmitting function can be imparted to the metal frame.

It is another object of the present invention to provide an external case for a communication device having a wireless communication or a wireless transmission / reception module, a charging transmitter, and a charging receiver even though the metallic frame is manufactured as described above.

It is another object of the present invention to provide a metal material which has better quality than plastics and has a high quality of a metal to improve the esthetics of the appearance of the applied device and to improve the overall durability of the applied device. And a metal frame.

It is still another object of the present invention to provide a metal frame with slits which are different in color from each other and stacking the slits vertically so that the slits are not overlapped with each other to give various colors to the frame, Which is capable of transmitting radio waves and having heat radiation characteristics.

It is a further object of the present invention to provide a metal frame which is used as a radio wave transmitting means and is used as a heat dissipating means to replace a carbon heat dissipating plate or the like which is a conventional heat dissipating means, And which can radiate radio waves or heat dissipation properties that can further maximize the size of the metal frame.

In order to achieve the above object, the present invention provides a metal frame comprising metal as a main component, wherein the metal frame is applied to a device having a radio wave transmission function, and at least a radio wave transmission characteristic is imparted to the metal frame, A slit is formed in at least a part of the frame so as to enable normal operation, and the area where the slit is formed is larger than the area occupied by the radio transmission / reception module for radio wave transmission, and the entire area occupied by the radio transmission / Wherein the metal frame is positioned within at least a part of the region where the slit is formed.

The boundary between the slit and the metal frame may be at least one selected from a straight line, a curved line, and a folded line.

It is preferable that the slit extends to form at least one pattern selected from a straight line, a curved line, and a folded line.

It is preferable that the slit is formed or processed by at least one of 3D printing, plating, sawing, laser, punching, and etching.

The slit preferably has a width of more than 0 millimeters (mm).

The metal frame preferably includes aluminum or copper.

Preferably, the metal frame is installed at a position corresponding to a main transmission direction or a main reception direction of a transmission unit or a reception unit of wireless power or wireless charging equipped in the apparatus.

Preferably, the metal frame amplifies an electric field by stacking multi-stages on a wireless communication (NFC) module.

It is preferable that the metal frame is stacked such that the patterns are the same or alternately stacked.

The metal frame is preferably used in place of the carbon-based heat-dissipating plate or in combination with the carbon-based heat-dissipating plate.

It is preferable that a plurality of metal frames are stacked on top and bottom, and an insulating layer is formed at least in part between the metal frames, and the insulating layer is any one of air, film, and coating layer.

It is preferred that the colors of the lower layer metal frame and the upper layer metal frame are implemented differently so that the color of the lower layer metal frame is visible through the slits of the upper layer metal frame.

It is preferred that the color of the film or coating layer on the lower layer metal frame and the upper layer metal frame be implemented differently so that the color of the film or coating layer is visible through the slits in the upper layer metal frame.

When the upper metal frame and the lower metal frame are laminated, it is preferable that the pattern of the lower metal frame is not overlapped with the pattern of the upper metal frame so that the slit formed in the lower metal frame is concealed.

The metal frame is preferably connected to the substrate so that it can be applied to a mobile device and used as an antenna.

The average width of the slits is preferably not more than twice the average width between two adjacent slits.

According to the present invention, a slit is formed at a position of a metal frame corresponding to at least a partial region of a metal frame, particularly, a coil forming region provided on a substrate for wireless charging, short range wireless communication, mobile settlement, It is possible to provide at least a radio wave transmitting function to the metal frame by making the region larger than the coil forming region.

In addition, although the present invention is manufactured using the metal frame material, the present invention can be expected to be used as an external case of a communication device, a charge transmitter, a charge receiver, etc. equipped with a wireless communication or wireless transmission / reception module.

In addition, since the present invention adopts a metal material having superior quality and superior quality to plastic, it is possible to improve the esthetic feeling of the appearance of the applied device and further improve the overall durability of the applied device.

Further, according to the present invention, slits are formed in metal frames of different colors, and the slits are stacked vertically so as not to overlap with each other, thereby giving various colors to the frame, thereby increasing the visual effect of the appearance of the device, Can be expected.

In addition, since the metal frame is used as a radiating means in combination with the radiating means, it is possible to replace the carbon-based heat-radiating plate, which is a conventional radiating means, or to use a carbon- It is expected that the effect can be maximized.

1 is an elevational view and a detailed view for explaining a metal frame according to a preferred embodiment of the present invention;
2 is a detailed view for explaining a slit according to a preferred embodiment of the present invention,
3 is a detailed view for explaining various examples of slits according to a preferred embodiment of the present invention,
4 is a plan view showing a boundary shape between a slit and a metal frame according to a preferred embodiment of the present invention,
5 is a plan view and a sectional view for explaining a film according to a preferred embodiment of the present invention,
6 is a cross-sectional view illustrating an example of a metal frame according to one preferred embodiment of the present invention,
7 is a cross-sectional view illustrating another example of a metal frame according to one preferred embodiment of the present invention,
FIG. 8 is a graph showing a heat radiation characteristic according to a slit interval of a metal frame as a function of time according to a preferred embodiment of the present invention,
9 is a sectional view for explaining another example of the metal frame according to the preferred embodiment of the present invention,
FIG. 10 is a perspective view and a plan view illustrating a stacked state of a metal frame according to a preferred embodiment of the present invention. FIG.
FIG. 11 is a detailed view illustrating a superposition situation between a region where a slit is formed in a metal frame and a region occupied by a module according to a preferred embodiment of the present invention, together with a comparative example.

Hereinafter, the present invention will be described in more detail based on the accompanying drawings and preferred embodiments. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the present invention, the defined terms are defined in consideration of the function of the present invention, and it can be changed according to the intention or custom of the technician working in the field, and the definition is based on the contents throughout this specification It should be reduced.

In the present invention, the metal frame may constitute the appearance of the device or may be embedded in the device. Further, the metal frame may not be composed of only 100% metal as long as it has a radio wave transmission function and a heat radiation function. In the present invention, it is preferable that the metal frame is interpreted as a frame containing metal as a main component.

In addition, the wireless transmission / reception module referred to in the present invention is collectively referred to as modules capable of transmitting, transmitting, and receiving radio waves such as wireless charging and wireless communication.

Also, the inclusion of a metal as a main component means that the metal occupies the highest proportion of the other components.

Further, the metal frame of the present invention includes not only a bulk shape but also a very thin structure such as a film shape.

In the present invention, a mobile phone, which is a mobile device, is represented as a representative embodiment of a device to which a metal frame is applied. However, the device is not limited to a mobile phone, and includes a notebook computer, a wearable device, and a wireless charger. It can also be extended to other non-mobile devices, such as built-in chargers and home appliances. That is, any device that generates heat or has a function of transmitting a radio wave may be all objects, so that the type of device is not limited.

Further, the metal frame of the present invention is not limited to the case of the mobile device, but the application area is not limited.

The material may be mainly lightweight aluminum or copper, but is not limited thereto.

Further, although the metal frame is mainly adopted as a plate shape, it is also natural that it is not limited to a plate shape.

Here, a few nanometers means one or more nanometers to less than 10 nanometers, and a few tens of nanometers means a nanometer to less than 100 nanometers. The sub-millimeter means more than 0.1 millimeter and less than 1 millimeter. In addition, "number" and "sub" shall be interpreted in accordance with the above rules.

Also, in the present invention, a slit means a gap formed by being removed in a thickness direction to such a degree that light can pass through a material such as a metal frame.

FIG. 1 is a perspective view illustrating a mobile device according to a preferred embodiment of the present invention, and FIG. 2 is a detailed view illustrating a slit.

As shown in the figure, the metal frame 100 is used as an outer case of the mobile device M as an example. In the metal frame 100, for example, a slit having a width W of several millimeters (mm) (110) is formed to impart a radio wave transmission function to the metal frame (100) having a normal radio wave shielding function. The width of the slit may be said to be desirable, but it may be larger. However, the narrower the width of the slit, the more excellent heat dissipation characteristics can be realized within the range of maintaining the radio wave transmission characteristics, the durability can be ensured, and the superior aesthetics can be obtained.

On the other hand, when the width of the slit 110 is in the range of several nanometers to several tens of micrometers, it is difficult to visually identify the slit 110, and thus a very different texture can be realized as compared with the case where visual identification is possible . Therefore, in order to use a metal frame having no slit 110, it is preferable that the width of the slit 110 is in the range of several nanometers to several tens of micrometers.

In Fig. 2, D1, D2, ..., ... Referring to the relationship between Dn and W, it is preferable that the average value of the width W of the slit is not more than twice the average value of the width D1 between two slits adjacent to the slit, and the width between the two slits is D2, D2 ... Dn.

However, also in this case, it is preferable that the width W of the slit has a value within a few millimeters (mm) (10 mm or less).

Meanwhile, the wireless transmission / reception module 120 may be a mobile payment means such as an NFC module, a Samsung Pay, and the like as well as a wireless charging transmission unit and a reception unit. That is, it includes all modules capable of wireless radio wave transmission such as wireless communication or wireless charging.

FIG. 3 is a detailed view illustrating various examples of a slit according to one preferred embodiment of the present invention, and FIG. 4 is a plan view showing a boundary shape of a slit and a metal frame according to a preferred embodiment of the present invention.

The slit 110 may represent a pattern of a straight line (FIG. 3A), a curve (FIG. 3B), a fold line (FIG. 3C) as shown in FIG. 3, (Fig. 4D). The boundary of the slit 110 may also be a structure in which a straight line, a curved line, a curved line, a concavo-convex structure, etc. are formed singly or randomly as shown in FIG.

For example, when the slits are formed by the punching process, the slits 100 are formed in such a manner that the perforations formed by the respective punching processes are overlapped with each other.

The slit 110 may be formed or formed by a method such as laser, sawing, and etching, and a method such as 3d printing or plating in addition to the punching method.

In the case of 3d printing and plating, it is possible to form a large through hole in a metal frame, and a plurality of linear metal supports connected between the boundaries of the through holes can be formed in the form of slits using 3d printing, It is also possible to directly produce a metal frame by laminating the metal layer in a slit shape by plating or the like and removing the substrate.

The slit 110 may be formed over the entire metal frame 100. However, the slit 110 may be formed locally only in a region corresponding to the area where the wireless transmission / reception module 120 is provided as shown in FIG. 6 . However, it should be larger than the range occupied by the wireless transmission / reception module 120, which can be understood with reference to FIG. 11 (a) is a preferred embodiment of the present invention in which the entire area of the wireless transmission / reception module 120 is superimposed on a larger slit area, and (b) to (d) are not preferred embodiments. That is, as shown in (b), the slits are superimposed only on a part of the module 120, or the module 120 is not overlapped with the module 120 as shown in (c) It is a smaller case. In this case, both eddy currents are generated, which is not preferable for the transmission of radio waves. 11A, when the virtual rim is formed at the outermost part of the area where the slit is formed, it means that the wireless transmission / reception module 120 should come into the frame.

It is needless to say that the pattern of the slit in Fig. 11 (a) is also not limited as shown in Fig. 11 (a).

That is, the area where the slit is formed is larger than the area occupied by the wireless transmission / reception module for radio wave transmission, and the entire area occupied by the wireless transmission / reception module is overlapped so as to be located in at least a part of the area where the slit is formed do. If the area where the slit is formed overlaps only a part of the area occupied by the module or is not overlapped at all or if the area where the slit is formed is smaller than the area occupied by the module, Therefore, since the radio wave transmission is not smooth, the communication sensitivity may be lowered or the charging time may be longer in the case of wireless charging. For example, in the case of a slot antenna, a vortex current is generated in a slot of a metal plate where a slot is formed by a radio wave originating from a wave-emitting module, and the vortex current can be used to increase or decrease the magnetic flux in the slot, The formed metal plate itself functions as an antenna having various performances according to magnetic flux (http://central.oak.go.kr/journallist/journaldetail.do;jsessionid=E4FE5E83B5B811E6E3025D752C9557C7?article_seq=14937&tabname=abst&resource_seq=-1&keywords = null). However, the metal frame having the slit according to the present invention does not perform some functions (for example, antenna functions) related to transmission and reception of radio waves like a slot antenna, but rather has a function of transmitting and receiving radio waves They do not perform, so they are a technology that lies at the opposite point. Therefore, the slot antenna and the present invention should not be regarded as a technology of the same or similar range, and they are completely different technologies. Here, the term " overlap " means that the slit region of the metal frame is spaced apart from the area occupied by the module.

Meanwhile, the metal frame 100 can further enhance the durability and the texture of the apparatus to which it is applied by further considering the color factor as shown in FIG. 5, and it can be seen from the following drawings Explain it.

FIG. 5 is a plan view and a cross-sectional view for explaining a film according to a preferred embodiment of the present invention, FIG. 5A is a plan view of a film-attached metal frame, and FIG. 5B is a cross-sectional view of FIG. Here, the film serves as an insulating layer. Alternatively, the metal frames of different colors may be stacked on top of each other without attaching the film, so that at least a part of the slits are not overlapped with each other, so that the color of the metal frame of the lower layer becomes the slit 110 formed in the metal frame of the upper layer So that the color can be expressed. In this case, the metal frames of the upper and lower layers are not in direct face-to-face contact with each other, but a partial short phenomenon is tolerated, so that the metal frames can be interconnected between the upper and lower metal frames.

That is, at least a part of the air layer between the upper and lower metal frames should function as an insulating layer. Further, a polymer coating layer imparted with a color may be interposed instead of the film. The film and the coating layer function to prevent direct contact between the upper and lower metal frames.

In short, it is preferable that the film, the coating layer, and the air layer are present in at least a partial region between the upper layer metal frame and the lower layer metal frame.

5, a film 130 having a predetermined color is further attached to the bottom of the metal frame 100. The color of the film 130 is recognized through the slit 110 of the metal frame from the outside , And to give various changes to the external aesthetics of the device to which it is applied. At this time, since the width of the slit 110 is small, the slit 110 itself may not be observed with the naked eye, but the color can be recognized through the slit 110 (FIG. 5A).

The film 130 also has a function of blocking inflow of contaminants (for example, water or fine dust) that can flow through the slit 110 by closing the slit 110.

When the upper metal frame and the lower metal frame are laminated, the pattern of the lower metal frame is not overlapped with the pattern of the upper metal frame, so that the slit formed in the lower metal frame can be concealed. It is possible to change the sense of aesthetics according to. Also in this case, since the slit exists, the radio wave transmission characteristics of the metal are not changed at all.

Meanwhile, the metal frame 100 may be used as an antenna for performing a heat-dissipating function for a device or for amplifying a radio wave, as shown in FIGS. 6 to 9, as well as a case constituting an appearance of a device to be applied. .

FIG. 6 is a cross-sectional view illustrating an example of a metal frame according to an embodiment of the present invention, and FIG. 7 is a cross-sectional view illustrating another example of a metal frame.

As shown in FIG. 6, the metal frame 100 can be used as a case for external use of the transmitter 123 of the wireless charger and the receiver 121 of the charging target device. Through this, the power can be smoothly transmitted and received, It is possible to stably charge the battery B of the battery packs 121 and 121.

In order to examine the heat dissipation characteristics of the metal frame 100, the temperature measured when the metal frame 100 with the slit 110 formed therein was used as the outer casing of the apparatus and then wirelessly charged was measured. The charging time was about one hour.

As a result, it was confirmed that the metal frame 100 according to the present invention exhibited a temperature range of about 36 to 39 DEG C at the time when 40 minutes passed, and there was no problem in the persistence of wireless charging. Normally, when the temperature measured at the external case of the device is less than 45 ° C when the wireless charging is performed, it is considered to be no problem. From this viewpoint, the metal frame 100 according to the present invention can be applied to an external case such as a wireless charger or a mobile device.

Likewise, the metal frame 100 may be embedded in the device and may emit heat generated by various wireless transmitting / receiving modules 120.

On the other hand, the metal can be the most preferable heat radiation material because of its excellent thermal conductivity. However, when such a metal is used as a heat-radiating material of the wireless transceiving module 120, there is a problem of blocking the radio wave, and ultimately the metal can not be used as a heat-radiating material. , And graphite has been mainly used.

However, since the metal frame 100 according to the present invention is provided with the slits 110, it is possible to transmit radio waves through the metal frame 100, will be.

In this case, it is possible to stack the metal frame 100 together with the graphite 125 heat radiator as shown in Figs. 7A and 7B, or to replace the graphite 125 heat radiator as shown in Figs. 7C and 7D It is possible. When stacking together with the graphite (125) heat sink, the stacking sequence, the properties of the graphite (125) heat sink, and the stacking method are not particularly limited.

7E and 7F, the magnetic substance sheet 131 can be further interposed on the wireless transmission / reception module, so that the magnetic substance sheet 131, the metal frame 100, the magnetic substance sheet 131, The frame 100 and the graphite 125 heat radiator may be laminated together. In this case, the stacking order of the magnetic body and the metal frame 100 and the graphite 125 heat radiator includes the number of cases in all cases. The magnetic substance sheet 131 takes charge of the functions of the existing wireless transmission / reception module.

On the other hand, when the graphite 125 and the metal frame 100 of the present invention are laminated together, the following effects are obtained. That is, the graphite 125 has a plate-like crystal structure and is weak in the interlayer coupling force, so that the heat transfer characteristic in the two-dimensional horizontal direction is excellent, but the heat transfer characteristic in the vertical direction is very weak. However, since the metal frame 100 of the present invention has high conductivity, it has excellent heat transfer characteristics in the vertical direction, and thus can overcome the disadvantage of the graphite 125 on the heat transfer characteristics.

Here, the graphite heating element is an example of a carbon-based heating element, and it is natural that the same applies to a carbon-based heating element.

At this time, the graphite 125 may be coated on the metal frame 100, but the metal frame 103 may be laminated on the graphite 125.

In addition, an adhesive layer may be formed between all the layers shown in FIG. 7, and the type of adhesive is not particularly limited as long as it is an adhesive commonly used in electronic parts.

In FIG. 8, the metal frame 100 having slit widths of 0.01 mm (a), 1 mm (b), 10 mm (c), and 15 mm (d) is plotted as a function of temperature over time. e).

As shown in the figure, when the width of the slit is 15 mm, the saturation temperature is high. Therefore, it is found that the heat dissipation characteristics are not better than those of the slit width of 0.01 mm, 1 mm, and 10 mm. On the other hand, when the width of the slit is 0.01 mm or 1 mm, the heat dissipation characteristics of graphite are similar to those of graphite. When the width is 10 mm, the slit width is relatively high, but it can be judged to be an effective heat dissipation characteristic. Therefore, it can be seen that the metal frame 100 of the present invention is used as a heat radiating material of the device.

As a result, the use of the metal frame 100 with the slits 110 according to the present invention can prevent overheating of the wireless transmission / reception module 120, thereby preventing safety accidents, There is an advantage that it can be solved.

At this time, the wireless transmission / reception module 120 includes a transmitter 123, a receiver 121 and an NFC module 127 for power transmission, a mobile payment MST module 129 such as Samsung Pay, 7, the metal frame 100 is disposed alone or in conjunction with the graphite 125 in the transmission coil 124, the receiving coil 122, and the NFC coil 128, which are sources of heat generation.

The metal frame 100 may have the same pattern of the slits 110 as shown in FIG. 10A, or stacked alternately as shown in FIGS. 10B and 10C. According to Fig. 10B, the slits of the lower metal frame are all covered by the uppermost metal frame, and according to Fig. 10C, the slits of the lower metal frame are at least partially exposed through the slit of the upper metal frame.

As described above, the present invention has great significance in the technical idea that a slit is formed in a metal to impart a radio wave transmission characteristic, and therefore, it is possible to directly use a metal frame in a portable device, do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: metal frame 110: slit
120: wireless transmission / reception module 121:
122: receiver coil 123: transmitter
124: transmitting coil 125: graphite
127: NFC module 128: NFC coil
129: MST module 130: Film
131: Magnetic body sheet

Claims (6)

A metal frame comprising a metal component,
The metal frame is applied to a device having a radio wave transmission function,
A slit is formed in at least a part of the frame so as to impart at least the radio wave transmission characteristic to the metal frame to enable normal operation of the device,
Wherein the area where the slit is formed is larger than the area occupied by the wireless transmission / reception module for radio wave transmission, the entire area occupied by the wireless transmission / reception module is located in at least a part of the area where the slit is formed,
Wherein a plurality of metal frames are stacked on top and bottom, wherein an insulating layer is formed at least in part between the metal frames, and the insulating layer is one of air, film, and coating layer. Metal frame. The method according to claim 1,
The slit
Wherein the metal frame is formed or processed by at least one of the following methods: 3D printing, plating, sawing, laser, punching, and etching. The method according to claim 1,
Wherein the metal frame comprises:
Wherein the metal frame is installed at a position corresponding to a main transmission direction or a main reception direction of a transmitting unit or a receiving unit of wireless power or wireless charging equipped in the device. The method according to claim 1,
Wherein the metal frame comprises:
Wherein the metal frame is replaced with a carbon-based heat-radiating plate or used together with a carbon-based heat-radiating plate. delete The method according to claim 1,
Wherein an average width of the slits is not more than twice an average width between two slits adjacent to each other.

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