Electronic device

Abstract

The invention discloses electronic equipment, and belongs to the technical field of electronic products. The electronic equipment comprises a heat dissipation device, a shell, a circuit board and a sound production device, the shell is provided with a third inner cavity and a second air outlet, and the circuit board, the heat dissipation device and the sound production device are all arranged in the third inner cavity; the heat dissipation device comprises a device body, an extrusion part, a plugging part, a first driving part and a second driving part, the device body is provided with a first inner cavity, an exhaust hole and an air inlet hole, the exhaust hole communicates with the first inner cavity and a second air outlet, and the air inlet hole communicates with the first inner cavity and a third inner cavity; the extrusion part, the blocking part, the first driving part and the second driving part are all arranged in the first inner cavity, the first driving part is connected with the extrusion part so as to drive the extrusion part to move in the direction away from or close to the exhaust hole, and the second driving part is connected with the blocking part so as to drive the blocking part to open or block the exhaust hole; the sound production device is provided with a vibrating diaphragm, and the vibration direction of the vibrating diaphragm is opposite to the movement direction of the extrusion part.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic products, and specifically relates to an electronic device. Background Art

[0002] Electronic devices (such as motherboards and other components) in electronic devices tend to generate heat during operation. To prevent the heat from affecting the normal operation of the electronic devices, electronic devices are usually equipped with heat dissipation devices, such as heat spreaders or fans.

[0003] When a heat spreader is used for heat dissipation, the heat spreader can transfer the heat generated by the electronic device to the screen area, and then dissipate the heat to the outside, thereby reducing the temperature of the entire electronic device. However, the heat dissipation efficiency of the heat spreader is low, so a fan can be used for forced heat dissipation. Since the fan can make the lower temperature gas blow through the electronic device in parallel, this can improve the heat dissipation efficiency. However, due to the viscosity of the air, the flow rate of the gas close to the surface of the electronic device will slow down, which greatly reduces the heat dissipation efficiency of the fan in the electronic device, that is, the heat dissipation efficiency of the fan is still not high. Therefore, the rotation speed of the fan can be increased, but this setting method easily leads to a large fan noise. It can be seen that the above-mentioned electronic device cannot ensure the heat dissipation efficiency while ensuring that the noise generated by the heat dissipation device during the heat dissipation process is small.

[0004] In summary, the electronic devices involved in the related art have the problem of being unable to balance the heat dissipation efficiency and the noise level. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide an electronic device that can solve the problem that the electronic devices involved in the related art cannot balance the heat dissipation efficiency and the noise level.

[0006] The embodiment of the present application provides an electronic device, including a heat dissipation device, a housing, a circuit board and a sound-generating device. The housing has a third inner cavity and is provided with a second air outlet, and the circuit board, the heat dissipation device and the sound generating device are all arranged in the third inner cavity; The heat dissipation device comprises a device body, an extrusion member, a blocking member, a first driving member and a second driving member, the device body has a first inner cavity, the device body is provided with an exhaust hole and an air inlet hole, the exhaust hole communicates with the first inner cavity and the second air outlet, and the air inlet hole communicates with the first inner cavity and the third inner cavity; The extruding member, the blocking member, the first driving member and the second driving member are all arranged in the first inner cavity, and the first driving member is connected to the extruding member to drive the extruding member to move away from or close to the exhaust hole, and the second driving member is connected to the blocking member to drive the blocking member to open or block the exhaust hole; When the extrusion member moves in a direction away from the exhaust hole, the blocking member blocks the exhaust hole, and when the extrusion member moves in a direction close to the exhaust hole, the blocking member opens the exhaust hole; The sound-generating device is provided with a diaphragm, and the vibration direction of the diaphragm is opposite to the movement direction of the extrusion member.

[0007] In the embodiment of the present application, since the air inlet of the device body is connected with the third inner cavity, the hot gas in the third inner cavity can enter the first inner cavity through the air inlet. At the same time, the exhaust hole of the device body is connected with the second air outlet. In the process of the extrusion member moving in the direction away from the exhaust hole, since the sealing member blocks the exhaust hole, the extrusion member increases the air pressure in the area by squeezing the hot gas on the side away from the exhaust hole. At this time, the hot gas in the area will flow to the vicinity of the exhaust hole with lower air pressure. In the process of the extrusion member moving in the direction close to the exhaust hole, since the sealing member opens the exhaust hole, the extrusion member can squeeze the hot gas around the exhaust hole so that the hot gas can be quickly discharged from the electronic device through the exhaust hole and the second air outlet, which realizes efficient hot gas flow. That is, this arrangement can improve the heat dissipation efficiency of the electronic device, thereby improving the cooling speed of the electronic device. At the same time, during the movement of the extrusion piece toward the exhaust hole, the air pressure on the side of the extrusion piece away from the exhaust hole decreases. At this time, the hot gas in the third inner cavity can quickly enter the first inner cavity through the air inlet hole, so that the hot gas can flow to the surrounding of the exhaust hole with lower air pressure, thereby achieving the effect of circulating heat dissipation. In addition, since the vibration direction of the diaphragm of the sound-emitting device is opposite to the movement direction of the extrusion piece, at least part of the sound emitted by the heat dissipation device can offset at least part of the sound emitted by the sound-emitting device, thereby reducing the noise generated by the heat dissipation device when it is working, and realizing the call leakage prevention function of the electronic device. It can be seen that the electronic device disclosed in the present application can ensure that the noise generated during the heat dissipation process is small while ensuring the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 An exploded view of the heat dissipation device disclosed in an embodiment of the present application; Figures 2 to 4 It is a schematic cross-sectional structural diagram of the heat dissipation device disclosed in the embodiment of the present application in different states; Figure 5 It is a partial cross-sectional structural schematic diagram of the heat dissipation device disclosed in the embodiment of the present application, which is arranged in the third inner cavity; Figure 6 A partial structural schematic diagram of a heat dissipation device disclosed in an embodiment of the present application; Figures 7 to 11 It is a schematic diagram of the structure of the heat dissipation device at different viewing angles disclosed in the embodiments of the present application; Figures 12 to 15 It is a schematic diagram of the structure of the electronic device at different viewing angles disclosed in the embodiments of the present application; Fig.16 An exploded diagram of an electronic device disclosed in an embodiment of the present application; Figures 17 to 19 A schematic diagram of a partial structure of an electronic device disclosed in an embodiment of the present application; Fig. 20 It is a schematic diagram of the cross-sectional structure of the electronic device at the sound-emitting device disclosed in an embodiment of the present application.

[0009] Description of reference numerals: 100-heat dissipation device, 110-device body, 111-first inner cavity, 112-exhaust hole, 113-inlet hole, 114-first plate body, 115-second plate body, 120-extrusion member, 130-blocking member, 140-first driving member, 150-second driving member, 160-first mounting seat, 170-second mounting seat, 180-collecting tank, 181-second inner cavity, 182-first air outlet; 200-housing, 210-third inner cavity, 220-second air outlet, 230-middle frame, 231-first through hole, 240-back cover, 250-air inlet, 260-sound outlet channel; 300-circuit board; 400-display screen, 410-fourth inner cavity; 500-sounding device; 610-first waterproof breathable membrane, 620-first dustproof net, 630-second dustproof net, 640-sealing element, 650-third dustproof net; 700-vapor chamber. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0011] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0012] The electronic device disclosed in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0013] Please refer to Figure 1-Figure 20 The present application discloses an electronic device, which includes a heat dissipation device 100, a housing 200, a circuit board 300 and a sound-generating device 500.

[0014] The housing 200 is a peripheral component of the electronic device, which can protect other components in the electronic device. Specifically, the housing 200 has a third inner cavity 210, and the circuit board 300, the heat sink 100 and the sound device 500 are all arranged in the third inner cavity 210. The circuit board 300 can ensure that the heat sink 100, the sound device 500 and other components of the electronic device work normally, the heat sink 100 can realize the heat dissipation function of the electronic device, and the sound device 500 can realize the sound function of the electronic device.

[0015] The housing 200 is provided with a second air outlet 220, which is used to discharge the hot gas in the housing 200, and the second air outlet 220 is used in conjunction with the heat dissipation device 100. For details, please refer to Figure 1 The heat dissipation device 100 includes a device body 110, an extrusion member 120, a sealing member 130, a first driving member 140 and a second driving member 150. The device body 110 is a basic component of the heat dissipation device 100, which can provide an installation basis for other components of the heat dissipation device 100 such as the extrusion member 120, the sealing member 130, the first driving member 140 and the second driving member 150.

[0016] Specifically, the device body 110 has a first inner cavity 111, and the extrusion member 120, the blocking member 130, the first driving member 140 and the second driving member 150 are all arranged in the first inner cavity 111, that is, the extrusion member 120, the blocking member 130, the first driving member 140 and the second driving member 150 are all integrated in the device body 110, which can reduce the volume of the entire heat dissipation device 100. The device body 110 is provided with an exhaust hole 112 and an air inlet 113, the exhaust hole 112 is connected to the first inner cavity 111 and the second air outlet 220, and the air inlet 113 is connected to the first inner cavity 111 and the third inner cavity 210, that is, the heat generated by the heating device such as the circuit board 300 in the third inner cavity 210 when working can heat the surrounding gas, thereby forming hot gas, which can enter the first inner cavity 111 through the air inlet 113, and then be discharged from the first inner cavity 111 through the exhaust hole 112, and finally be discharged from the electronic device through the second air outlet 220, thereby achieving a cooling effect.

[0017] The first driving member 140 and the second driving member 150 can both be electrically connected to the circuit board 300 through wires, and the first driving member 140 is connected to the extrusion member 120. After the first driving member 140 is energized, it can drive the extrusion member 120 to move in a direction away from or close to the exhaust hole 112, thereby driving the movement of the hot gas. The second driving member 150 is connected to the blocking member 130. After the second driving member 150 is energized, it can drive the blocking member 130 to open or block the exhaust hole 112, so that the exhaust hole 112 can discharge the hot gas or prevent the hot gas at the second outlet 220 from flowing back.

[0018] The specific process of heat dissipation device 100 to discharge hot gas is as follows: Figure 2 In the initial state, the first driving member 140 and the second driving member 150 are not powered, so that the extruding member 120 and the blocking member 130 are both stationary. At this time, the blocking member 130 is in a state of blocking the exhaust hole 112; please refer to Figure 3 In the process of the extrusion piece 120 moving in the direction away from the exhaust hole 112, the space between the extrusion piece 120 and the exhaust hole 112 becomes larger, and the air pressure in this part of the area decreases. In order to prevent the external high-pressure gas from entering the first inner cavity 111 through the second gas outlet 220 and the exhaust hole 112, or to prevent the external high-pressure gas from pressing the already exhausted hot gas into the first inner cavity 111, thereby affecting the normal exhaust process, at this time, the blocking piece 130 needs to continue to block the exhaust hole 112, and this setting method can make the high-pressure hot gas between the extrusion piece 120 and the air inlet 113 flow to the low-pressure area, that is, the high-pressure hot gas enters the space between the extrusion piece 120 and the exhaust hole 112; please refer to Figure 4When the extrusion piece 120 moves toward the exhaust hole 112, the blocking piece 130 opens the exhaust hole 112. At this time, the extrusion piece 120 can squeeze the high-pressure hot gas entering between the extrusion piece 120 and the exhaust hole 112 out of the exhaust hole 112 and discharge it through the second outlet 220.

[0019] At the same time, since the extrusion piece 120 moves toward the direction close to the exhaust hole 112, the space between the extrusion piece 120 and the air inlet hole 113 becomes larger, and then the air pressure in this part of the area decreases. At this time, the high-pressure hot gas generated in the third inner cavity 210 can enter the first inner cavity 111 through the air inlet hole 113, and in the next process of the extrusion piece 120 moving in the direction away from the exhaust hole 112, this part of the high-pressure hot gas enters the space between the extrusion piece 120 and the exhaust hole 112, so that the purpose of circulating heat dissipation can be achieved all the time. In addition, since the size of the air inlet hole 113 is usually small, in the process of the extrusion piece 120 moving in the direction away from the exhaust hole 112, only a small part of the high-pressure hot gas that has entered the first inner cavity 111, or even no high-pressure hot gas will flow back to the third inner cavity 210 through the air inlet hole 113. Even if a small part of the high-pressure hot gas flows back, the adverse effect on the overall heat dissipation effect is minimal.

[0020] The sound-generating device 500 is provided with a diaphragm, which is the main component of the sound-generating device 500 to achieve the sound-generating effect, and the vibration direction of the diaphragm can be opposite to the movement direction of the extrusion member 120. That is, at this time, at least part of the sound generated by the extrusion member 120 during movement can offset at least part of the sound emitted by the sound-generating device 500, thereby reducing the noise generated by the heat dissipation device 100 during operation while realizing the call leakage prevention function of the electronic device, that is, protecting the privacy of the user.

[0021] In the embodiment of the present application, since the air inlet 113 of the device body 110 is connected to the third inner cavity 210, the hot gas in the third inner cavity 210 can enter the first inner cavity 111 through the air inlet 113. At the same time, the exhaust hole 112 of the device body 110 is connected to the second exhaust port 220. When the extrusion member 120 moves in a direction away from the exhaust hole 112, the blocking member 130 blocks the exhaust hole 112. Therefore, the extrusion member 120 squeezes the hot gas on the side away from the exhaust hole 112, so that the air pressure in the area is reduced. When the pressure of the extrusion piece 120 rises, the hot gas in the area will flow to the vicinity of the exhaust hole 112 where the air pressure is lower. When the extrusion piece 120 moves toward the exhaust hole 112, the sealing piece 130 opens the exhaust hole 112. Therefore, the extrusion piece 120 can squeeze the hot gas around the exhaust hole 112 so that the hot gas can be quickly discharged from the electronic device through the exhaust hole 112 and the second air outlet 220. This realizes efficient hot gas flow. That is, this arrangement can improve the heat dissipation efficiency of the electronic device, thereby improving the cooling speed of the electronic device.

[0022] At the same time, during the movement of the extrusion piece 120 toward the exhaust hole 112, the air pressure on the side of the extrusion piece 120 away from the exhaust hole 112 decreases. At this time, the hot gas in the third inner cavity 210 can quickly enter the first inner cavity 111 through the air inlet 113, so that the hot gas can flow to the surrounding of the exhaust hole 112 with lower air pressure, thereby achieving the effect of always dissipating heat. In addition, since the vibration direction of the diaphragm of the sound-generating device 500 is opposite to the movement direction of the extrusion piece 120, at least part of the sound emitted by the heat dissipation device 100 can offset at least part of the sound emitted by the sound-generating device 500, thereby reducing the noise generated when the heat dissipation device 100 is working, and realizing the call leakage prevention function of the electronic device. It can be seen that the electronic device disclosed in the present application can ensure that the noise generated during the heat dissipation process is small while ensuring the heat dissipation efficiency.

[0023] Optionally, the vibration amplitude of the diaphragm can be equal to the movement amplitude of the extrusion member 120, that is, at this time, the sound generated by the movement of the extrusion member 120 and the sound emitted by the sound-generating device 500 are of the same frequency and opposite phase, so that the sound emitted by the extrusion member 120 when it moves can completely offset the sound emitted by the sound-generating device 500, so as to further reduce the noise generated by the heat dissipation device 100 when it is working, and realize the call leakage prevention function of the electronic device, that is, even if the user is very close to others, others cannot hear the sound emitted by the sound-generating device 500 clearly. Of course, the vibration amplitude of the diaphragm and the movement amplitude of the extrusion member 120 may not be equal.

[0024] Optionally, the first driving member 140 and the second driving member 150 can both be telescopic cylinders. In this case, the first driving member 140 can drive the extrusion member 120 to move as a whole away from or close to the exhaust hole 112, and the second driving member 150 can drive the blocking member 130 to move as a whole away from or close to the exhaust hole 112 to open or block the exhaust hole 112.

[0025] In another embodiment, the first driving member 140 and the second driving member 150 can both be piezoelectric members. Optionally, the piezoelectric member can be a member such as a piezoelectric ceramic or a shape memory alloy that can deform after being energized. That is, the inverse piezoelectric effect of the piezoelectric ceramic can be used to drive the extrusion member 120 and the sealing member 130 to move, or the shape memory effect of the shape memory alloy can be used to drive the extrusion member 120 and the sealing member 130 to move.

[0026] The extrusion member 120 and the blocking member 130 may both be flexible members, so that the extrusion member 120 and the blocking member 130 can be bent and deformed more easily. Specifically, by applying an alternating voltage to the first driving member 140, the first driving member 140 can be deformed, thereby driving a portion of the extrusion member 120 to bend and deform in a direction away from or close to the exhaust hole 112. By applying a pulsed unidirectional voltage to the second driving member 150, the second driving member 150 can be deformed, thereby driving a portion of the blocking member 130 to bend and deform in a direction away from the exhaust hole 112 to open the exhaust hole 112. When the pulsed unidirectional voltage is stopped from being applied to the second driving member 150, the second driving member 150 will restore the deformation, that is, drive the blocking member 130 to reset to block the exhaust hole 112.

[0027] In this embodiment, since the first driving member 140 can drive the partial deformation of the extrusion member 120, and similarly, the second driving member 150 can drive the partial deformation of the sealing member 130, it is possible to achieve the effect that the extrusion member 120 squeezes the hot gas and the sealing member 130 blocks or opens the exhaust hole 112. That is, the embodiment of the present application utilizes the performance of the piezoelectric member itself, and has a good driving effect on the extrusion member 120 and the sealing member 130. At the same time, the overall space occupied by the first driving member 140, the second driving member 150, the extrusion member 120 and the sealing member 130 is also relatively small.

[0028] Optionally, both ends of the extruding member 120 and both ends of the blocking member 130 may be mounted on two oppositely disposed side walls of the device body 110 .

[0029] In another embodiment, please refer to Figure 2The heat dissipation device 100 may further include a first mounting seat 160 and a second mounting seat 170 spaced apart in the first inner cavity 111, and both ends of the extrusion member 120 are detachably connected to the first mounting seat 160 and the second mounting seat 170, respectively, and both ends of the blocking member 130 are also detachably connected to the first mounting seat 160 and the second mounting seat 170, respectively, that is, the installation bases of the extrusion member 120 and the blocking member 130 are both the first mounting seat 160 and the second mounting seat 170, and the extrusion member 120 and the blocking member 130 are spaced apart in the thickness direction of the device body 110, that is, at this time, the extrusion member 120 and the blocking member 130 are relatively arranged, and the extrusion member 120 and the blocking member 130 can be bent and deformed along the thickness direction of the device body 110.

[0030] In this embodiment, since the extrusion member 120 and the blocking member 130 are detachably connected to the first mounting seat 160 and the second mounting seat 170, this can facilitate the disassembly, maintenance or replacement of the extrusion member 120 and the blocking member 130. At the same time, in the setting direction of the two oppositely arranged side walls of the above-mentioned device body 110, the sizes of the first mounting seat 160 and the second mounting seat 170 are generally larger than the sizes of the side walls themselves. Therefore, the contact areas of the first mounting seat 160 and the second mounting seat 170 with the extrusion member 120 and the blocking member 130 are both large, which can ensure the installation stability of the extrusion member 120 and the blocking member 130 on the first mounting seat 160 and the second mounting seat 170. In addition, in the above-mentioned direction, the sizes of the extrusion member 120 and the blocking member 130 do not need to be too large, and thus the first driving member 140 and the second driving member 150 do not need to provide excessive driving force to reduce energy consumption.

[0031] Optionally, the first driving member 140 may be attached to a side of the extruding member 120 close to the exhaust hole 112 , and the second driving member 150 may be attached to a side of the blocking member 130 close to the exhaust hole 112 .

[0032] In another embodiment, please refer to Figures 2 to 4 The first driving member 140 is attached to the side of the extrusion member 120 away from the exhaust hole 112, that is, the first driving member 140 is attached to the side of the extrusion member 120 away from the blocking member 130, so as to avoid the first driving member 140 from deforming when powered on and driving the extrusion member 120 to bend and deform in the direction close to the exhaust hole 112 (for details, please refer to Figure 4 ), the extrusion piece 120 affects the degree of bending deformation of the blocking piece 130, thereby avoiding affecting the degree to which the blocking piece 130 opens the exhaust hole 112.

[0033] At the same time, the second driving member 150 is attached to the side of the blocking member 130 away from the exhaust hole 112, that is, the second driving member 150 is attached to the side of the blocking member 130 away from the exhaust hole 112 to prevent the second driving member 150 from deforming during power-on (see Figure 4 ), occupying the internal space of the exhaust hole 112 and affecting the opening degree of the exhaust hole 112, thereby avoiding affecting the exhaust rate of the exhaust hole 112.

[0034] In this embodiment, by applying a voltage to the first driving member 140, the first driving member 140 will be deformed and elongated, and the thickness will be thinned (for details, please refer to Figure 3 ), at this time, the first driving member 140 will drive the extrusion member 120 to bend and deform in a direction away from the exhaust hole 112; after the voltage applied to the first driving member 140 is reversed, the first driving member 140 begins to deform in the reverse direction, that is, the first driving member 140 will shorten and become thicker (for details, please refer to Figure 4 ), at this time, the first driving member 140 will drive the extruding member 120 to bend and deform in the direction close to the exhaust hole 112; after stopping applying voltage to the first driving member 140, the first driving member 140 will restore its deformation (for details, please refer to Figure 2 ), at this time, the first driving member 140 will drive the extruding member 120 to reset.

[0035] By applying a voltage to the second driving member 150, the second driving member 150 will be deformed and elongated, and the thickness will be thinned (for details, please refer to Figure 4 ), at this time, the second driving member 150 will drive the blocking member 130 to bend and deform in a direction away from the exhaust hole 112; after the voltage is stopped being applied to the second driving member 150, the second driving member 150 will recover its deformation (for details, please refer to Figure 2 and Figure 3 ), at this time, the second driving member 150 will drive the blocking member 130 to reset, thereby blocking the exhaust hole 112.

[0036] It can be seen that by applying an alternating voltage to the first driving member 140 and a pulsed unidirectional voltage to the second driving member 150, the blocking member 130 and the blocking member 130 can be periodically and synchronously deformed in opposite directions, thereby achieving the effect of the heat dissipation device 100 always dissipating heat.

[0037] Optionally, the number of the extruding members 120 , the number of the blocking members 130 , the number of the first driving members 140 , and the number of the second driving members 150 may all be one.

[0038] In another embodiment, please refer to Figures 1 to 6 The number of the extrusion members 120, the number of the blocking members 130, the number of the first driving members 140 and the number of the second driving members 150 are all at least two, the extrusion members 120 are arranged at intervals, the blocking members 130 are arranged at intervals, the extrusion members 120 correspond to the first driving members 140 one by one and are connected, the blocking members 130 correspond to the second driving members 150 one by one and are connected, and the device body 110 is provided with at least two exhaust holes 112 arranged at intervals (for details, please refer to Figure 7 ), each blocking member 130 can correspond to each exhaust hole 112 one by one.

[0039] In this embodiment, when multiple extrusion members 120 move simultaneously, the rate at which the hot gas in the third inner cavity 210 enters the first inner cavity 111 can be further increased. At the same time, since the device body 110 is provided with multiple exhaust holes 112, the rate at which the hot gas in the first inner cavity 111 is discharged can be further increased, thereby further improving the heat dissipation efficiency of the heat dissipation device 100, and further improving the cooling speed of the electronic device.

[0040] Optionally, refer to Figure 1 The heat dissipation device 100 may further include a collecting tank 180, which is connected to the device body 110 to enclose a second inner cavity 181. A first air outlet 182 is provided on the collecting tank 180, and each exhaust hole 112 can be connected to the first air outlet 182 through the second inner cavity 181, that is, each exhaust hole 112 faces the second inner cavity 181, and the first air outlet 182 is connected to the second air outlet 220.

[0041] In the process of multiple exhaust holes 112 discharging hot gas, the collection groove 180 can collect the hot gas discharged from the multiple exhaust holes 112 at the same time, and guide them to the same first outlet 182 at the same time, so that multiple streams of hot gas can be quickly discharged through the first outlet 182 and the second outlet 220, and because only one first outlet 182 is connected to the second outlet 220, the size of the first outlet 182 can be designed to be smaller, and correspondingly, the size of the second outlet 220 can also be designed to be smaller to ensure the structural strength of the housing 200. Of course, the heat dissipation device 100 may also not include the collection groove 180, in which case, the multiple exhaust holes 112 can all face the second outlet 220.

[0042] Optionally, each exhaust hole 112 may face the bottom wall of the collecting tank 180 , and the first air outlet 182 may be opened on the bottom wall of the collecting tank 180 , so that the hot gas exhausted through the exhaust holes 112 can flow directly toward the first air outlet 182 .

[0043] In another embodiment, please refer to Figures 1 to 5 , a first air outlet 182 may be provided on the side wall of the collection tank 180, that is, at this time, the direction of the exhaust hole 112 intersects with the direction of the first air outlet 182, and the distance between the exhaust hole 112 and the first air outlet 182 is relatively far, which can further prevent the hot gas discharged from the first air outlet 182 from flowing back to the exhaust hole 112. At the same time, since the second air outlet 220 is usually provided on the side wall of the shell 200, this makes it easier for the first air outlet 182 provided on the side wall of the collection tank 180 to communicate with the second air outlet 220.

[0044] Optionally, refer to Figure 1 The electronic device may further include a first dustproof net 620, which is arranged at the first air outlet 182, that is, between the first air outlet 182 and the second air outlet 220, to prevent foreign matter and other impurities from entering the heat dissipation device 100 through the first air outlet 182, thereby preventing the heat dissipation device 100 from being affected in normal operation. Of course, the electronic device may also not include the first dustproof net 620.

[0045] Optionally, the electronic device may further include a second dustproof net 630, which is disposed at the air inlet 113 to prevent foreign matter and other impurities in the third inner cavity 210 from entering the heat dissipation device 100 through the air inlet 113, thereby preventing the heat dissipation device 100 from being affected in normal operation. Of course, the electronic device may also not include the second dustproof net 630.

[0046] Optionally, refer to Figure 5 The electronic device may further include a seal 640, which is disposed between the second air outlet 220 and the first air outlet 182 to prevent foreign matter and impurities such as water vapor from entering the heat dissipation device 100 through the second air outlet 220 and the first air outlet 182, thereby preventing the heat dissipation device 100 from being affected in normal operation. Of course, the electronic device may not include the seal 640.

[0047] Optionally, refer to Fig.16 and Fig. 20 The electronic device may further include a third dustproof net 650, which is disposed at the front cavity opening of the sound-emitting device 500, specifically between the sound-emitting device 500 and the sound outlet channel 260 described later, so as to seal and prevent foreign matter from entering the front cavity of the sound-emitting device 500, that is, the third dustproof net 650 may prevent foreign matter and other impurities from entering the sound-emitting device 500 through the sound outlet channel 260 and the front cavity opening of the sound-emitting device 500, thereby avoiding affecting the normal operation of the sound-emitting device 500. Of course, the electronic device may also not include the third dustproof net 650.

[0048] Optionally, the air inlet hole 113 and each of the air outlet holes 112 may be round holes or other special-shaped holes, or the shape of the air inlet hole 113 may be different from the shape of each of the air outlet holes 112 .

[0049] In another embodiment, the air inlet hole 113 and each exhaust hole 112 can be a strip hole, and the length direction of the air inlet hole 113 is parallel to the length direction of the exhaust hole 112, that is, the extension direction of the air inlet hole 113 is the same as the extension direction of each exhaust hole 112, which can facilitate the simultaneous processing of the air inlet hole 113 and each exhaust hole 112.

[0050] Optionally, the device body 110 may include a second plate body 115 arranged in its own thickness direction. The size of the second plate body 115 is relatively large to facilitate the setting of each exhaust hole 112. The air inlet 113 can be arranged on a side plate of the device body 110 connected to the second plate body 115.

[0051] In another embodiment, the device body 110 may also include a first plate body 114 arranged in the thickness direction of the device body, that is, the first plate body 114 and the second plate body 115 are arranged opposite to each other, and the first plate body 114, the second plate body 115 and the above-mentioned side plates form a first inner cavity 111. The size of the first plate body 114 is also relatively large, and the air inlet hole 113 can be opened on the first plate body 114. That is, at this time, the air inlet hole 113 and each exhaust hole 112 are arranged opposite to each other, so that after the hot gas enters the air inlet hole 113, it can flow in the direction of the exhaust hole 112. When the exhaust hole 112 is opened, the hot gas can be discharged more smoothly.

[0052] Please refer to Figures 12 to 19 The electronic device may further include a display screen 400, which is a main component for realizing the display function of the electronic device. The housing 200 may include a middle frame 230 and a back cover 240. The middle frame 230 is a basic component of the electronic device, and the middle frame 230 is used to protect the entire electronic device. The display screen 400 and the back cover 240 are located on opposite sides of the middle frame 230, and the middle frame 230 and the back cover 240 are connected to enclose a third inner cavity 210. The middle frame 230 may be provided with a second air outlet 220, and the middle frame 230 and the display screen 400 are connected to enclose a fourth inner cavity 410. A heat spreader 700 may be provided in the fourth inner cavity 410, and the heat spreader 700 may reduce the temperature of the display screen 400. At the same time, part of the heat generated by the circuit board 300 during operation may be transferred to the heat spreader 700 through the middle frame 230, that is, the heat spreader 700 may further reduce the temperature of the circuit board 300.

[0053] Optionally, to further improve the heat dissipation efficiency of the fourth inner cavity 410, please refer to Figures 17 to 19 The middle frame 230 may be provided with a first through hole 231, the first through hole 231 connects the third inner cavity 210 and the fourth inner cavity 410, and the air inlet 113 faces the first through hole 231. That is, at this time, the outer wall of the device body 110 where the air inlet 113 is provided is installed on the inner wall of the middle frame 230 where the first through hole 231 is provided, and there is a certain gap between the outer wall of the device body 110 and the inner wall, so that the hot gas in the third inner cavity 210 can reach the air inlet 113 through the gap between the outer wall of the device body 110 and the inner wall. At the same time, the air inlet 113 can be provided toward the first through hole 231.

[0054] In this embodiment, the heat dissipation device 100 can quickly discharge the hot gas generated in the third inner cavity 210 and the fourth inner cavity 410 at the same time, thereby quickly reducing the temperature of the display screen 400 and the circuit board 300 at the same time, and further quickly reducing the temperature of the entire electronic device. Of course, the middle frame 230 may not be provided with the first through hole 231. In this case, heat dissipation can be performed only through the heat spreader 700, or the heat spreader 700 can dissipate part of the heat in the fourth inner cavity 410, while the other part of the heat can be transferred to the third inner cavity 210 through the middle frame 230 and dissipated through the heat dissipation device 100.

[0055] When the hot gas in the third inner cavity 210 is discharged by the heat dissipation device 100, cold air needs to enter the third inner cavity 210 at the same time to ensure that the air pressure of the third inner cavity 210 is always in a balanced state with the external air pressure, and the cold air entering is used to reduce the temperature of the third inner cavity 210, that is, the cold air entering can become hot gas after heat exchange with the circuit board 300, and is discharged by the heat dissipation device 100 again, so that the purpose of circulating heat dissipation can be achieved. Optionally, external cold air can enter the third inner cavity 210 through the charging port opened on the housing 200, that is, the battery and the circuit board 300 of the electronic device can be both arranged in the third inner cavity 210.

[0056] In one embodiment, in order to improve the intake efficiency of cold air, the housing 200 may also be provided with an air inlet 250, that is, the housing 200 may be specially provided with an air inlet 250 for the entry of cold air, and the air inlet 250 is connected to the third inner cavity 210, please refer to Fig.13 , Fig.16 and Fig.19 Specifically, the air inlet 250 may be provided on the back cover 240. Of course, the air inlet 250 may also be provided on the middle frame 230. In this embodiment, when the electronic device is in a charging state, the charging port is blocked. At this time, it is difficult for cold air to enter the third inner cavity 210. Therefore, the air inlet 250 specially provided on the housing 200 can ensure that cold air can continuously enter the third inner cavity 210, and it is also easier to process the air inlet 250 on the housing 200.

[0057] Alternatively, in another embodiment, to improve the intake efficiency of cold air, please refer to Fig. 20, the housing 200 may also be provided with a sound outlet channel 260, which is connected to the third inner cavity 210 through the sound-emitting device 500. Specifically, the middle frame 230 may be provided with a sound outlet channel 260, and the front cavity of the sound-emitting device 500 is connected to the sound outlet channel 260, and the rear cavity of the sound-emitting device 500 is connected to the third inner cavity 210. The sound emitted by the sound-emitting device 500 may be transmitted to the external environment through the sound outlet channel 260, so that the user can hear the sound emitted by the sound-emitting device 500. In this embodiment, when the sound-emitting device 500 is not working, the external cold air may enter the third inner cavity 210 through the sound outlet channel 260, the front cavity and the rear cavity of the sound-emitting device 500, so as to further reduce the temperature of the circuit board 300. Therefore, this embodiment can reduce the number of openings of the housing 200, thereby improving the dustproof and waterproof performance and structural strength of the electronic device.

[0058] Optionally, when the shell 200 is provided with an air inlet 250, and the air inlet 250 and the rear cavity of the sound-emitting device 500 are simultaneously connected to the third inner cavity 210, this can further improve the efficiency of external cold air entering the third inner cavity 210, that is, the embodiment of the present application is provided with multiple channels for the intake of cold air, which can further quickly reduce the temperature of the circuit board 300, thereby further quickly reducing the temperature of the electronic device.

[0059] Optionally, the number of the heat dissipation device 100 may be one.

[0060] In another embodiment, the number of heat dissipation devices 100 may be at least two, including a first heat dissipation device and a second heat dissipation device, the air inlet 113 of the first heat dissipation device is connected to the third inner cavity 210, and the air outlet 112 of the first heat dissipation device is connected to the second air outlet 220, that is, the first heat dissipation device is used to increase the exhaust rate of hot gas discharged from the third inner cavity 210, the air inlet 113 of the second heat dissipation device is connected to the air inlet 250 and / or the rear cavity of the sound device 500, and the air outlet 112 of the second heat dissipation device is connected to the third inner cavity 210, that is, the second heat dissipation device is used to increase the intake rate of external cold air into the third inner cavity 210. It can be seen that multiple heat dissipation devices 100 can improve the circulation efficiency of gas in electronic equipment to further improve the heat dissipation effect of electronic equipment.

[0061] Optionally, refer to Fig.16 The electronic device may further include a first waterproof breathable membrane 610, which is disposed at the air inlet 250, so that external cold air can enter the air inlet 250 while preventing other impurities such as water vapor from entering the third inner cavity 210 to avoid corrosion of components such as the circuit board 300. Of course, the electronic device may also not include the first waterproof breathable membrane 610.

[0062] Optionally, the electronic device may further include a second waterproof breathable membrane, which is disposed at the sound outlet channel 260, so that external cold air can enter the sound outlet channel 260, and the sound emitted by the sound-emitting device 500 can pass through the sound outlet channel 260, while preventing other impurities such as water vapor from entering the sound-emitting device 500 and the third inner cavity 210, so as to avoid corrosion of the circuit board 300, the electronic devices in the sound-emitting device 500 and other components. Of course, the electronic device may not include the second waterproof breathable membrane.

[0063] Optionally, when the electronic device includes both the first waterproof breathable membrane 610 and the second waterproof breathable membrane, this can fully prevent water vapor and other impurities from entering the third inner cavity 210 to avoid corrosion of components such as the circuit board 300.

[0064] Optionally, the electronic device disclosed in the present application may be a mobile phone, a tablet computer, a wearable device, an e-book reader, a game console, and an in-vehicle electronic device, etc. The embodiments of the present application do not limit the specific type of the electronic device.

[0065] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An electronic device, characterized in that: It comprises a heat dissipation device (100), a housing (200), a circuit board (300) and a sound-generating device (500). The housing (200) has a third inner cavity (210) and is provided with a second air outlet (220); the circuit board (300), the heat dissipation device (100) and the sound-generating device (500) are all arranged in the third inner cavity (210); The heat dissipation device (100) comprises a device body (110), an extrusion member (120), a blocking member (130), a first driving member (140) and a second driving member (150); the device body (110) has a first inner cavity (111); the device body (110) is provided with an exhaust hole (112) and an air inlet hole (113); the exhaust hole (112) is connected to the first inner cavity (111) and the second air outlet (220); and the air inlet hole (113) is connected to the first inner cavity (111) and the third inner cavity (210); The extruding member (120), the blocking member (130), the first driving member (140) and the second driving member (150) are all arranged in the first inner cavity (111), and the first driving member (140) is connected to the extruding member (120) to drive the extruding member (120) to move in a direction away from or towards the exhaust hole (112), and the second driving member (150) is connected to the blocking member (130) to drive the blocking member (130) to open or block the exhaust hole (112); When the extrusion member (120) moves in a direction away from the exhaust hole (112), the blocking member (130) blocks the exhaust hole (112); when the extrusion member (120) moves in a direction close to the exhaust hole (112), the blocking member (130) opens the exhaust hole (112); The sound-generating device (500) is provided with a diaphragm, and the vibration direction of the diaphragm is opposite to the movement direction of the extrusion member (120).

2. The electronic device according to claim 1, characterized in that: The vibration amplitude of the diaphragm is equal to the movement amplitude of the extrusion member (120).

3. The electronic device according to claim 1, characterized in that: The first driving member (140) and the second driving member (150) are both piezoelectric members, the extrusion member (120) and the blocking member (130) are both flexible members, the first driving member (140) can drive a portion of the extrusion member (120) to bend and deform in a direction away from or towards the exhaust hole (112), and the second driving member (150) can drive a portion of the blocking member (130) to bend and deform in a direction away from the exhaust hole (112), so as to open the exhaust hole (112).

4. The electronic device according to claim 3, characterized in that: The heat dissipation device (100) further comprises a first mounting seat (160) and a second mounting seat (170) which are arranged at intervals in the first inner cavity (111); two ends of the extrusion member (120) are respectively detachably connected to the first mounting seat (160) and the second mounting seat (170); two ends of the blocking member (130) are respectively detachably connected to the first mounting seat (160) and the second mounting seat (170); and the extrusion member (120) and the blocking member (130) are arranged at intervals in the thickness direction of the device body (110).

5. The electronic device according to claim 3, characterized in that: The first driving member (140) is attached to a side of the extruding member (120) facing away from the exhaust hole (112), and the second driving member (150) is attached to a side of the blocking member (130) facing away from the exhaust hole (112).

6. The electronic device according to claim 1, characterized in that: The number of the extrusion members (120), the number of the blocking members (130), the number of the first driving members (140) and the number of the second driving members (150) are all at least two, the extrusion members (120) are arranged at intervals, the blocking members (130) are arranged at intervals, the extrusion members (120) correspond to the first driving members (140) one by one and are connected, the blocking members (130) correspond to the second driving members (150) one by one and are connected, and the device body (110) is provided with at least two exhaust holes (112) arranged at intervals, and the blocking members (130) correspond to the exhaust holes (112) one by one.

7. The electronic device according to claim 6, characterized in that: The heat dissipation device (100) further comprises a collecting groove (180), wherein the collecting groove (180) is connected to the device body (110) to enclose a second inner cavity (181), and a first air outlet (182) is provided on the collecting groove (180), and each of the exhaust holes (112) can be connected to the first air outlet (182) through the second inner cavity (181), and the first air outlet (182) is connected to the second air outlet (220).

8. The electronic device according to claim 7, characterized in that: Each of the exhaust holes (112) faces the bottom wall of the collecting groove (180), and the first air outlet (182) is provided on the side wall of the collecting groove (180).

9. The electronic device according to claim 6, characterized in that: The air inlet hole (113) and each of the air outlet holes (112) are strip-shaped holes, and the length direction of the air inlet hole (113) is parallel to the length direction of the air outlet hole (112); and / or, The device body (110) comprises a first plate body (114) and a second plate body (115) which are opposite to each other in the thickness direction thereof; the air inlet (113) is provided on the first plate body (114); and the air outlet (112) is provided on the second plate body (115).

10. The electronic device according to claim 1, characterized in that: The electronic device further comprises a display screen (400); the housing (200) comprises a middle frame (230) and a back cover (240); the display screen (400) and the back cover (240) are located on opposite sides of the middle frame (230); the middle frame (230) and the back cover (240) are connected to form the third inner cavity (210); the middle frame (230) and the display screen (400) are connected to form a fourth inner cavity (410); the middle frame (230) is provided with a first through hole (231) and the second air outlet (220); the first through hole (231) is connected to the third inner cavity (210) and the fourth inner cavity (410); and the air inlet (113) faces the first through hole (231).

11. The electronic device according to claim 1, characterized in that: The housing (200) is further provided with an air inlet (250), wherein the air inlet (250) is in communication with the third inner cavity (210); and / or, The shell (200) is also provided with a sound outlet channel (260), and the sound outlet channel (260) is connected to the third inner cavity (210) through the sound-generating device (500).

12. The electronic device according to claim 11, characterized in that: The number of the heat dissipation devices (100) is at least two, including a first heat dissipation device and a second heat dissipation device, the air inlet (113) of the first heat dissipation device is connected to the third inner cavity (210), the air outlet (112) of the first heat dissipation device is connected to the second air outlet (220), the air inlet (113) of the second heat dissipation device is connected to the air inlet (250) and / or the rear cavity of the sound-generating device (500), and the air outlet (112) of the second heat dissipation device is connected to the third inner cavity (210).

13. The electronic device according to claim 11, characterized in that: The electronic device further comprises a first waterproof breathable membrane (610), wherein the first waterproof breathable membrane (610) is arranged at the air inlet (250); and / or, The electronic device further comprises a second waterproof and breathable membrane, wherein the second waterproof and breathable membrane is arranged at the sound outlet channel (260).

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