CN111511168A - Mobile terminal - Google Patents

Abstract

The application provides a mobile terminal, edge through the design fin is end to end and not in many limits on same straight line, make every limit be certain angle, thereby make interference signal's radiation direction comparatively in disorder, avoided all interference signal all to radiate towards a direction and the gain that causes is strengthened, simultaneously, length through making every limit all is less than terminal body produced interference signal's 1/4 wavelength, make the edge of fin be not enough to radiate sufficient interference signal wavelength, thereby weaken interference signal's radiation, and then furthest has avoided the fin to mobile phone antenna's interference.

Description

Mobile terminal

Technical Field

The application relates to the technical field of terminals, in particular to a mobile terminal.

Background

At present, be provided with high fever module on mobile terminal's the mainboard usually, this high fever module during operation can flow through the heavy current, produces the high interfering signal to the antenna, and under the normal condition, this high interfering signal can directly outwards radiate, gives off outside mobile terminal, can not cause the interference to mobile terminal's antenna. However, because the graphite flake that the graphite material made is pasted usually on current mobile terminal's the casing, with dispel the heat to mobile terminal, and consider that the graphite flake is the conductor, the in-process that so interfering signal outwards radiated can be sheltered from by interfering signal meeting graphite flake, and reflect back the mainboard, radiate once more after the excitation of each module on the mainboard, thereby arouse that interfering signal just radiates out after carrying out a lot of shock between mainboard and graphite flake, and at this moment, interfering signal's intensity has increased several times, to mobile terminal's receiving antenna, for example, receiving diversity antenna and GPS antenna's antenna performance has caused very big interference.

Disclosure of Invention

The application provides a mobile terminal, aims at solving the technical problem that the graphite flake used for heat dissipation in the existing terminal causes great interference to the antenna performance.

The technical scheme provided by the application is as follows:

the application provides a mobile terminal, including terminal body and be used for right terminal body carries out radiating fin, the edge of fin is enclosed by end to end and a plurality of limits on same straight line not, every the length on limit is less than 1/4 wavelength of the interference signal that terminal body produced.

In the mobile terminal of the application, at least two adjacent sides of the plurality of sides are straight line sections.

In the mobile terminal, the plurality of edges are straight line segments, and an included angle between any two straight line segments is 90 degrees.

In the mobile terminal, the plurality of edges are all straight line segments, and at least one obtuse angle exists in an included angle formed by any three adjacent straight line segments.

In the mobile terminal of the present application, the at least one obtuse angle is no greater than 135 degrees.

In the mobile terminal, the plurality of edges are straight line segments, and any two adjacent included angles formed by the straight line segments are acute angles.

In the mobile terminal of the present application, the length of each of the sides ranges from 10-15 mm.

In the mobile terminal of the present application, the heat sink includes a graphite sheet or a metal foil sheet.

In the mobile terminal of the application, the mobile terminal further comprises a terminal shell, the terminal body is located in the terminal shell, and the cooling fins are located between the terminal body and the terminal shell and fixed on the inner surface of the terminal shell.

At the mobile terminal of this application, the terminal body includes the mainboard, the fin covers on the mainboard.

The beneficial effect of this application does: different from the prior art, the mobile terminal provided by the application comprises a terminal main body and a radiating fin for radiating the terminal main body, wherein the edge of the radiating fin is surrounded by a plurality of edges which are connected end to end and are not on the same straight line, and the length of each edge is smaller than 1/4 wavelengths of interference signals generated by the terminal main body. This application is through a plurality of minor faces of 1/4 wavelength that the edge design of fin is less than the interference signal that the terminal main part produced for single limit length, make the edge of fin be not enough to radiate sufficient interference signal wavelength, thereby weaken interference signal's radiation, and simultaneously, be certain angle through each minor face that makes the fin, make interference signal's radiation direction comparatively in disorder, and then avoided all interference signal all to radiate towards a direction and the gain that causes strengthens, the interference of fin to cell-phone antenna has been avoided to the at utmost.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a conventional heat sink provided in an embodiment of the present application;

fig. 2 is a schematic view of a split structure of a mobile terminal according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a heat sink provided in an embodiment of the present application;

fig. 4 is another schematic structural diagram of a heat sink provided in an embodiment of the present application;

fig. 5 is another schematic structural diagram of a heat sink according to an embodiment of the present application.

Detailed Description

The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be implemented by the application. Directional phrases used in this application, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting. In the drawings, elements having similar structures are denoted by the same reference numerals.

It should be noted that the thicknesses and shapes in the drawings of the present application do not reflect actual proportions, but are merely intended to schematically illustrate the contents of the embodiments of the present application.

In the existing mobile terminal, a terminal body, a terminal case, and a heat sink are indispensable.

Specifically, be provided with parts such as camera, mainboard and battery in the terminal main part, wherein, there are a lot of devices that generate heat on the mainboard, especially, along with the continuous development of terminal technology, mobile terminal's function is more and more powerful, is provided with more and more devices that support terminal function on the mainboard, and these devices can overload the operation often, and self constantly produces the heat, makes mobile terminal's temperature more and more high. Meanwhile, when the mobile terminal operates, the battery needs to be continuously discharged, the battery can generate heat, especially when the mobile phone is low in electric quantity or in the charging process, the heat generated by the battery is very much, and in order to improve the operation performance of the mobile phone and avoid the influence of heating of each device on the holding of a user, the problems are solved by attaching a radiating fin to the terminal shell in the prior art.

However, referring to fig. 1, fig. 1 is a schematic structural diagram of a conventional heat sink provided in an embodiment of the present invention, a conventional heat sink 10 is generally rectangular or square in shape adapted to a motherboard or a terminal housing, and there is no special requirement for side length, angle, etc., and then the conventional heat sink is attached to the terminal housing or the motherboard in a whole manner, but since an interference signal is generated on the motherboard and is directly emitted to the outside of the terminal before the heat sink 10 is not installed, the interference signal is blocked by the heat sink 10 because the heat sink 10 is made of a conductor such as graphite or metal, and is reflected between the heat sink 10 and the motherboard for multiple times, and is finally emitted at an edge of the heat sink 10, at this time, the intensity of the interference signal has been increased by several times, which causes great interference to an antenna on a mobile phone. Accordingly, the present application provides another heat sink mounted in a mobile terminal to solve this problem.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application. As shown in fig. 2, the mobile terminal 20 includes a terminal body 21, and a heat sink 22 for dissipating heat from the terminal body 21, wherein an edge of the heat sink 22 is surrounded by a plurality of sides that are connected end to end and are not on the same straight line, and a length of each side is smaller than 1/4 wavelengths of interference signals generated by the terminal body 21.

Specifically, when the mobile terminal 20 is provided with the heat sink 22, the interference signal generated by the terminal body 21 may be reflected between the heat sink 22 and the terminal body 21 for multiple times, and finally radiated at the edge of the heat sink 22, and generally, when the length of one side of the heat sink 22 is greater than 1/4 wavelength of the interference signal, the interference signal may be radiated according to the original frequency, and when the length of one side of the heat sink 22 is less than 1/4 wavelength of the interference signal, the length of one side of the heat sink 22 is not sufficient to radiate a sufficient wavelength of the interference signal, and the radiation of the interference signal may be attenuated. For example, when the interference signal is 2Ghz, the 1/4 wavelength is 37.5mm, when the length of the single straight side of the heat sink 22 is greater than 37.5mm, the radiated signal is still 2Ghz, and when the length of the single straight side of the heat sink 22 is less than 37.5mm, the radiated signal is less than 2 Ghz.

Meanwhile, the plurality of sides of the heat sink 22 are not on the same straight line and form a certain angle, so that the radiation direction of the interference signal is relatively scattered, and the gain enhancement caused by the radiation of all the interference signals in one direction can be avoided. On the other hand, some interference signals cross in the air, and some interference signal components cancel each other in the crossing process, and the interference can be weakened.

In some embodiments, the heat sink 22 is covered with an insulating layer (not shown) to prevent shorting by contact between the heat sink 22 and electrical devices on the terminal body 21.

Specifically, the mobile terminal 20 has a relatively high integration level, for example, various chips such as a CPU (processor), a power supply, a word bank, an intermediate frequency, a power amplifier, an antenna switch, and the like are often mounted on a motherboard, and if a mobile phone with multiple functions is used, some interface circuit chips for the interface module, such as a bluetooth chip, a camera chip, an interface chip, and the like, are sometimes added.

Taking a CPU as an example, there are usually dozens of interface circuits used in the mobile terminal 20, and almost all the interface circuits communicate with the CPU directly or indirectly, which makes the CPU need many pins, but the CPU performs signal processing of small current, so the pins of the CPU are usually not as big as a power amplifier, so many times, the CPU will be a BGA (inner pin) chip that looks very precise on the motherboard, and if the heat sink 23 contacts with the pins on the CPU to cause a short circuit, the performance of the mobile terminal 20 will be greatly affected, and even the function of the mobile terminal 10 will be completely disabled.

Secondly, there are usually many capacitors on the motherboard of the mobile phone, for example:

capacitors of 10 or 15 microfarads, most of which have only one or two, are used for filtering the cell voltage, usually black and yellow.

The capacitance of about 4.7 or 1 microfarad, which is mostly used for filtering when the power IC outputs to another chip or circuit module, is many because the circuit module of the mobile terminal 20 is not few, so the capacitance of about 4.7 or 1 microfarad is many, such capacitance is usually beige, and it can be seen by multimeter measurement that one end of the capacitance is always grounded, it is worth noting that if two ends are grounded, the capacitance may be damaged by leakage, and if two ends are not grounded, the capacitance is either a coupling capacitance or where there is a broken line on the board, while the former case is very rare because the coupling capacitance is usually a smaller capacitor in the mobile terminal 20, and there are usually no coupling capacitances in the mobile terminal 20, and there are only a few coupling capacitances in the transmitting path.

Capacitors of the order of 100 nanofarads and smaller, which are typically the largest in mobile terminals 20, typically function as small signal filtering and signal coupling, and some are protective, and also have smaller capacities, such as tens of picofarads, but these capacitors are already small and the largest in number in a handset.

Third, the if and the power amplifier are usually made together, and most if edges have a 26MHZ crystal oscillator, which is usually a rectangular iron-clad quad-module.

The power amplifier is for power consumption reasons, and its pins are usually made larger, which is also for heat dissipation, but the larger pins are more likely to contact the heat sink 22 and cause short circuit.

In this embodiment, the insulating layer is a polyethylene terephthalate layer. Polyethylene terephthalate is the most important variety of thermoplastic polyester, and Polyethylene terephthalate (PET) is abbreviated as PET or PEIT, commonly called polyester resin. It is a condensation polymer of terephthalic acid and ethylene glycol, collectively referred to as a thermoplastic polyester, or a saturated polyester. The novel heat dissipation sheet has good mechanical property, the impact strength of the novel heat dissipation sheet is 3-5 times that of other films, the novel heat dissipation sheet can adapt to a complex environment, is not easy to damage, and can prolong the service life of the heat dissipation sheet 22. Meanwhile, the price of the polyethylene terephthalate is low, and the polyethylene terephthalate is a material which saves cost.

It should be noted that the terminal body 21 and the heat sink 22 are not limited in size in the present application, and may be determined as the case may be.

In some embodiments, at least two adjacent sides of the plurality of sides are straight line segments.

Specifically, there may be a curved section, such as an arc, among the above-mentioned plurality of sides, but the condition that the length of each side is smaller than 1/4 wavelengths of the interference signal generated by the terminal body 21 must be satisfied.

In a preferred embodiment, the plurality of edges are straight line segments.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a heat sink according to an embodiment of the present disclosure, as shown in the figure, in the embodiment, a plurality of edges of the heat sink 221 are all straight line segments, and an included angle between any two straight line segments is 90 degrees.

For example, the edge of the heat sink 221 includes a plurality of sides, each side is a straight line segment, and the included angle a between the line segments L1 and L2 is 90 degrees, so that the edge of the heat sink 221 is stepped and has a diamond shape as a whole.

Referring to fig. 4, fig. 4 is another schematic structural diagram of a heat sink in an embodiment of the present disclosure, in the heat sink 222 of the present embodiment, a plurality of sides are all straight line segments, and an included angle formed by any three adjacent straight line segments has at least one obtuse angle.

For example, as shown in fig. 4, the edge of the heat sink 222 includes a plurality of sides, each side is a straight line segment, for example, line segments D1, D2, D3 and D4, specifically, D1, D2 and D3 are adjacent straight line segments, an angle α 1 between D1 and D2 is an acute angle, an angle α 2 between D2 and D3 is an obtuse angle, D2, D3 and D4 are adjacent three straight line segments, an angle α 2 between D2 and D3, and an angle α 3 between D3 and D4 are obtuse angles.

In some embodiments, the obtuse angle is no greater than 135 degrees.

In some embodiments, the plurality of edges are straight line segments, and any two straight line segments form an acute angle.

For example, referring to fig. 5, fig. 5 is another structural schematic diagram of the heat sink provided in the embodiment of the present application, an edge of the heat sink 223 includes a plurality of sides, and each side is a straight line segment, for example, line segments R1, R2, and R3, specifically, R1, R2, and R3 are adjacent straight line segments, and an included angle β 1 between R1 and R2, and an included angle β 2 between R2 and R3 are acute angles.

It is to be noted that the shape of the heat dissipating fin 22 provided in the present application is not limited to the embodiment, and may be a combination of the above types, for example.

In some embodiments, the length of each of the sides ranges from 10 mm to 15 mm.

Specifically, the wavelength range of the generated interference signal is usually 28mm to 107mm calculated according to the frequency band currently used by the mobile terminal 20 for communication, because the side length is less than a quarter wavelength, the side length may be 7mm to 26mm, but in view of the size limitation of the mobile terminal 20 and the heat sink applicability, the length range of the side length is limited to 10 mm to 15mm in the present embodiment.

In some embodiments, fins 22 may comprise graphite sheets or metal foils.

In one embodiment, the heat sink 22 is an aluminum heat sink or a copper heat sink. Pure aluminum and pure copper have better heat-conducting property, and the heat radiating fins 22 made of pure aluminum and pure copper as heat-radiating materials have good heat-radiating effect, so that heat generated by the heat source component can be radiated at a higher speed, and the heat-radiating effect is improved.

Preferably, the heat sink 22 may be a graphite sheet because the graphite material is mainly composed of polycrystalline graphite, is an inorganic non-metallic material, but is called a semi-metal because it has good thermal and electrical conductivity. Graphite has higher thermal and electrical conductivity than some metals, and has lower human thermal expansion coefficient and good chemical stability. Secondly, graphite is lighter in weight, being 25% lighter in weight than aluminum and 75% lighter in weight than copper, and can reduce the weight of the heat sink 22, and when it is assembled on the mobile terminal 20, the weight of the mobile terminal 20 can be reduced. In addition, the graphite sheet can be smoothly attached to any plane and curved surface, and can be cut in any form according to the requirements of customers, so that the production and the processing are convenient. Therefore, the heat transfer stability of the mobile phone can be effectively improved by using the graphite sheet as the heat dissipation sheet 22.

In some embodiments, heat sink 22 may be a thermally conductive silicone sheet.

Specifically, the heat-conducting silica gel sheet is one of heat-conducting interface materials, is a sheet material, can be cut at will according to the size and the shape of a heating power device, is an industrial product heat-conducting material with good heat-conducting capacity and insulating property, is particularly soft, is very convenient to use, is flat and smooth after being torn off, is rich in elasticity, can be used after being pasted, completes heat transfer between a heating part and a radiating part, increases the heat-conducting area, simultaneously has the effects of shock absorption, insulation, sealing and the like, and is a new material with high manufacturability and usability.

It is noted that the present application is not limited to the specific material of the heat sink 22, and the heat sink 22 may also comprise a phase change material or a composite material.

In some embodiments, the thickness of the heat sink 22 may be 1-2mm, or may be improved according to actual needs, for example, the area of the tablet pc is much larger than that of the mobile phone, the heat generated during operation is also much, and the thickness of the heat sink 22 may be increased appropriately to ensure the heat dissipation effect.

In some embodiments, the mobile terminal 20 further includes a terminal housing 23, the terminal body 21 is located within the terminal housing 23, and the heat sink 22 is located between the terminal body 21 and the terminal housing 23 and is fixed to an inner surface of the terminal housing. Specifically, the heat sink 22 may be fixed to the terminal housing 23 by an adhesive.

In the present embodiment, as shown in fig. 1, the terminal housing 23 includes at least one notch for accommodating a camera module or the like on the terminal main body 21, and similarly, if the heat sink 23 needs to be attached to the notch, the same accommodation adjustment should be made, for example, a notch is provided at a corresponding position.

Specifically, the terminal housing 23 includes an inner surface and an outer surface, the inner surface is a surface facing the terminal body 21, and the heat sink 22 is attached to the inner surface of the terminal housing 23, so that the heat dissipation effect can be enhanced, and the overall appearance of the mobile terminal 20 can be improved.

In this embodiment, the terminal housing 23 may be a metal housing, such as a metal of magnesium alloy, stainless steel, etc., and it should be noted that the metal itself has a certain heat dissipation function, and although the metal housing is easy to generate heat during use, the metal housing has a good heat dissipation function for the internal terminal main body 21. It should be noted that the material of the terminal housing 23 in the embodiment of the present application is not limited to this, and other methods may also be adopted, such as a plastic housing, a ceramic housing, or a housing structure in which metal and plastic are matched with each other, specifically, the metal part may be formed first, such as forming a magnesium alloy substrate by injection molding, and then injecting plastic on the magnesium alloy substrate to form a plastic substrate, so as to form a complete housing structure.

In this embodiment, when the terminal housing 23 is a metal housing, a metal back plate (not shown in the figure) may be further disposed on the inner surface of the terminal housing 23 for heat dissipation, that is, on the basis of the heat sink 22, a metal heat conducting plate is also designed on the inner surface of the terminal housing 23, and the heat conducted by the heat sink 22 can be directly transferred to each corner of the metal body through the metal heat conducting plate, so that the heat in the enclosed space can be quickly diffused and dissipated, and a user does not feel too much heat during holding, thereby improving the holding experience of the user.

In some embodiments, the terminal body 21 includes a main board (not shown) on which the heat sink 22 is overlaid.

Specifically, the main Board is usually a Printed Circuit Board (PCB) which supports various components and can realize electrical connection or electrical insulation therebetween, and the heat sink 22 is coated on the main Board to uniformly disperse heat of the processor, thereby improving heat dissipation efficiency.

In this embodiment, the heat sink 22 may directly cover the surface sheet of the heat generating body on the main board.

In this embodiment, the mobile terminal 20 further includes a memory (not shown in the figure) for storing application programs and data. The memory stores an application program having executable program code embodied therein. The application programs may constitute various functional modules.

In the present embodiment, the mobile terminal 20 further includes a processor (not shown) for executing an application program stored in the memory, thereby executing various functional applications and data processing.

In the present embodiment, the mobile terminal 20 further includes a display unit (not shown in the drawings) for displaying information input to the mobile terminal 20 by a user or information provided to the user and various graphic user interfaces of the mobile terminal 20. These graphical user interfaces may be made up of graphics, text, icons, video, and any combination thereof. The display unit may include a display panel.

In this embodiment, the mobile terminal may further include a memory (not shown in the figure), the memory may be used to store software programs and modules, and the processor executes various functional applications and data processing by running the software programs and modules stored in the memory, that is, implements a communication data saving function. The memory may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory may further include memory located remotely from the processor, which may be connected to the mobile terminal 20 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The processor is the control center of the mobile terminal 20. The processor connects various parts of the entire mobile terminal 20 using various interfaces and lines, performs various functions of the mobile terminal 20 and processes data by running or executing an application program stored in the memory and calling data stored in the memory, thereby monitoring the mobile terminal 20 as a whole.

The mobile terminal 20 may also include at least one sensor (not shown), such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display panel according to the brightness of ambient light, and a proximity sensor that turns off the display panel and/or the backlight when the mobile terminal 20 is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which may be further configured on the mobile terminal 20, detailed descriptions thereof are omitted.

In addition, the mobile terminal 20 may further include a camera module, a bluetooth module, an input module, a wireless fidelity module, and the like, which are not described herein again.

In the above embodiment, the mobile terminal 20 may be a notebook, a tablet computer, a mobile phone, and the like, which is not limited in this embodiment.

Different from the prior art, the mobile terminal 20 provided by the present application includes a terminal body 21 and a heat sink 22 for dissipating heat from the terminal body 21, wherein an edge of the heat sink 22 is surrounded by a plurality of edges (not shown in the figure) connected end to end and not in the same straight line, and a length of each edge is less than 1/4 wavelengths of the interference signal generated by the terminal body 21. This application is through a plurality of minor faces of 1/4 wavelength that the edge design of fin is less than the interference signal that the terminal main part produced for single limit length, make the edge of fin be not enough to radiate sufficient interference signal wavelength, thereby weaken interference signal's radiation, and simultaneously, be certain angle through each minor face that makes the fin, make interference signal's radiation direction comparatively in disorder, and then avoided all interference signal all to radiate towards a direction and the gain that causes strengthens, the interference of fin to cell-phone antenna has been avoided to the at utmost.

In addition to the above embodiments, other embodiments are also possible. All technical solutions formed by using equivalents or equivalent substitutions fall within the protection scope of the claims of the present application.

In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.

Claims (10)

1. A mobile terminal is characterized by comprising a terminal body and a radiating fin for radiating heat of the terminal body, wherein the edge of the radiating fin is surrounded by a plurality of edges which are connected end to end and are not in the same straight line, and the length of each edge is less than 1/4 wavelengths of interference signals generated by the terminal body.

2. The mobile terminal of claim 1, wherein at least two adjacent edges of the plurality of edges are straight line segments.

3. The mobile terminal of claim 2, wherein the plurality of edges are straight line segments, and an included angle between any two straight line segments is 90 degrees.

4. The mobile terminal of claim 2, wherein the plurality of edges are all straight line segments, and an included angle formed by any three adjacent straight line segments has at least one obtuse angle.

5. The mobile terminal of claim 4, wherein the at least one obtuse angle is no greater than 135 degrees.

6. The mobile terminal of claim 2, wherein the plurality of edges are straight line segments, and an included angle formed by any two adjacent straight line segments is an acute angle.

7. The mobile terminal of claim 1, wherein the length of each of the edges is in a range of 10-15 mm.

8. The mobile terminal of claim 1, wherein the heat sink comprises a graphite sheet or a metal foil.

9. The mobile terminal of claim 1, further comprising a terminal housing, wherein the terminal body is located within the terminal housing, and wherein the heat sink is located between the terminal body and the terminal housing and is fixed to an inner surface of the terminal housing.

10. The mobile terminal according to claim 1, wherein the terminal body includes a main board, and the heat sink is overlaid on the main board.

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