Electronic device

Abstract

An electronic device includes: a case including a lower case and an upper case provided so as to be movable in a vertical direction with respect to the lower case, the case being provided with an air suction hole and an air discharge hole; a cooling fan; a duct member which is provided on the upper side of the cooling fan with a space therebetween, and which forms an internal space between the duct member and the upper case at least when the upper case moves upward; and a cooled member, in which the duct member is provided at an interval on the upper side of the cooled member, and the cooling fan sucks air, which flows in from the suction hole, into the cooling fan through at least a part of the cooled member on the lower side of the duct member.

Description

Technical Field

[0001] The present invention relates to electronic equipment such as a projection device. Background Art

[0002] In the past, a projection device as an electronic device has been disclosed, which has improved mobility by making the upper housing movable relative to the lower housing in the up-down direction, and has increased the cooling effect during use by expanding the internal space of the housing. For example, Japanese Patent Publication No. 2009-115967 discloses a projection device, wherein the movable housing is movable relative to the main body in the up-down direction, and a passage separation plate is provided, which is arranged to hang down from the surface of the movable housing when the movable housing is located on the upper side and is used to separate the intake passage and the exhaust passage. The passage separation plate can reduce the hot exhaust air of the exhaust passage mixed in the intake passage as cooling air. Summary of the invention

[0003] The electronic device disclosed in the present invention comprises: a housing, which includes a lower housing and an upper housing which is arranged to be movable in the up-down direction relative to the lower housing and is provided with an air intake hole and an air exhaust hole; a cooling fan; a duct component which is arranged at an interval on the upper side of the cooling fan and forms an internal space between the duct component and the upper housing at least when the upper housing moves upward; and a cooled component, wherein the duct component is arranged at an interval on the upper side of the cooled component, and the cooling fan causes the air flowing in from the air intake hole to be sucked into the cooling fan at the lower side of the duct component via at least a portion of the cooled component. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Figure 1 This is a perspective view showing a state in which the upper housing of the projection device according to the embodiment of the present invention is moved downward and closed, as seen from the front.

[0005] Figure 2 This is a perspective view showing a state in which the upper case of the projection device according to the embodiment of the present invention is moved upward and opened, as seen from the front.

[0006] Figure 3 A projection device according to an embodiment of the present invention Figure 2 In addition, the optical elements inside the optical housing are omitted.

[0007] Figure 4 It is an exploded perspective view showing a state in which an upper rail of the projection device according to the embodiment of the present invention is mounted on an upper housing.

[0008] Figure 5 It is an exploded perspective view showing a state in which the lower rail of the projection device according to the embodiment of the present invention is mounted on the lower casing.

[0009] Figure 6 It is an enlarged perspective view of a main part of the guide device of the projection device according to the embodiment of the present invention.

[0010] Figure 7 It is a diagram showing a functional circuit block of a projection device according to an embodiment of the present invention.

[0011] Figure 8 It is a schematic plan view showing the internal structure of the projection device according to the embodiment of the present invention.

[0012] Fig. 9 1 is a perspective view showing the flow of cooling air in the projection device according to the embodiment of the present invention, as viewed from the front. For ease of understanding, the upper housing is indicated by two-dot chain lines.

[0013] Fig.10 1 is a perspective view showing the flow of cooling air in a projection device according to a modified example of the embodiment of the present invention, as viewed from the rear. For ease of understanding, the upper housing is indicated by two-dot chain lines.

[0014] Fig.11 This is a perspective view showing a state in which an upper housing of a projection device according to a modification example of the embodiment of the present invention is moved upward and opened, as seen from the front. DETAILED DESCRIPTION

[0015] The following describes the embodiments of the present disclosure. Figure 1 , Figure 2 As shown, the projection device 10 as an electronic device has a housing 250 in a substantially long rectangular box shape. The housing 250 includes an upper housing 251 and a lower housing 252. The upper housing 251 is configured to be movable in the up-down direction relative to the lower housing 252. The lower housing 252 has a projection port 11. The projection device 10 emits projection light from the projection port 11. In addition, in the following description, left and right in the projection device 10 represent left and right directions relative to the projection direction from the projection port 11, and front and back represent front and back directions relative to the traveling direction of the projection light of the projection device 10. In addition, the state in which the upper housing 251 is moved to the lower limit can also be referred to as the state in which the housing 250 is closed, and the state in which the upper housing 251 is moved to the upper limit can be referred to as the state in which the housing 250 is opened.

[0016] The upper housing 251 has a top plate 251a, a front plate 251b, a rear plate 251c, a left plate 251d, and a right plate 251e, and is formed into a substantially long rectangular box shape with an opening on the lower side opposite to the top plate 251a. A key / indicator portion 37 as an operation panel is provided on the upper surface of the rear side of the top plate 251a of the upper housing 251. The key / indicator portion 37 is provided in an inclined shape with respect to the upper surface of the top plate 251a which is a flat surface parallel to the horizontal plane, so that the rear side descends downward. In other words, the key / indicator portion 37 is provided on the upper surface of the upper housing 251 (housing 250) in an inclined manner so as to rise from the rear side to the front side.

[0017] The lower housing 252 has a bottom plate 252a, a front plate 252b, a rear plate 252c, a left plate 252d, and a right plate 252e, and is formed into a generally long rectangular box shape with an upper side opening opposite to the bottom plate 252a. A protrusion 252a1 is provided on the bottom plate 252a of the lower housing 252, which protrudes outward in a flange shape from the outer surface of each plate of the front plate 252b, the rear plate 252c, the left plate 252d, and the right plate 252e. A connection terminal 252d1 for a PC (personal computer) or the like is provided on the left plate 252d. A power connector 252e1 is provided on the lower side of the corner connecting the rear plate 252c and the right plate 252e (see Fig.10 ).

[0018] The air intake hole 253 and the air exhaust hole 254 are provided on the housing 250 so as to communicate with the inside and outside of the housing 250. Fig.10 As shown, the upper shell back air intake hole 253a as the upper shell back air intake hole 253 is provided on the back plate 251c on the back side of the upper shell 251. The upper shell back air intake hole 253a has four rectangular openings arranged in the vertical direction and longer in the left-right direction. Figure 2 As shown, a lower case front exhaust hole 254a as an exhaust hole 254 is provided on the right side of the front plate 252b on the front side of the lower case 252, and the exhaust hole 254 has 5 rows and 3 columns of long rectangular openings arranged in the left-right direction. Between the lower case front exhaust hole 254a of the front plate 252b and the projection port 11, there is provided an air intake hole 253 having a long rectangular opening in the left-right direction and 4 arranged in the up-down direction, namely, the lower case front exhaust hole 253b. In addition, as shown in FIG. Fig.10 As shown, the lower case back side air intake holes 253c, which are air intake holes 253 arranged in 4 rows and 6 columns except for 2 in the upper left row, are provided on the left side of the back side of the lower case 252. In addition, the lower case back side air intake holes 253c, which are air intake holes 253 arranged in 4 rows and 6 columns except for 2 in the upper left row, are provided on the right side of the back side of the lower case 252. The lower case back side air intake holes 253c, which are air intake holes 253 arranged in 1 air intake hole 253, are provided on the lower right side of the back side of the lower case 252.

[0019] When the projection device 10 is not in use, such as when it is portable or stored, Figure 1 As shown, the upper shell 251 can be in a closed state. At this time, the side plates (front plate 251b, rear plate 251c, left plate 251d, right plate 251e) of the upper shell 251 are arranged on the outside of the side plates (front plate 252b, rear plate 252c, left plate 252d, right plate 252e) of the lower shell 252. Therefore, in the closed state, the upper shell 251 is arranged in a manner covering the lower shell 252. In addition, in the closed state, the lower end surface of the side plate (front plate 251b, rear plate 251c, left plate 251d, right plate 251e) of the upper shell 251 abuts against the upper surface of the protrusion 252a1 of the bottom plate 252a of the lower shell 252. The outer surface of the side plate of the upper shell 251 is roughly continuous with the outer side surface of the protrusion 252a1. Therefore, the appearance in the closed state is beautiful.

[0020] In addition, the air intake holes 253 and the air exhaust holes 254 are not provided on the front plate 251b of the upper shell 251. Moreover, on the back side of the upper shell 251, the air intake holes 253a on the back side of the upper shell and the air intake holes 253c on the back side of the lower shell (the first air intake holes 253c1 on the back side of the lower shell, the second air intake holes 253c2 on the back side of the lower shell) are arranged at positions that do not overlap in the closed state when the upper shell 251 moves downward. In addition, the left and right side surfaces (left plate 251d, right plate 251e) of the shell 250 (upper shell 251) are not provided with openings, etc. Therefore, in the state where the upper shell 251 is closed, it is difficult for dust and the like to enter the interior of the shell 250 through the air intake holes 253 or the air exhaust holes 254.

[0021] like Figure 3 As shown in FIG. 1 , the projection device 10 includes a guide device 260. The upper housing 251 can move relative to the lower housing 252 via the guide device 260. In addition, the duct member 290 is configured not to move with the movement of the upper housing 251. The guide device 260 is provided at the approximate center in the front-rear direction near the left and right edges of the housing 250 (see also FIG. 1 ). Fig. 9 , Fig.10 The guide device 260 includes an upper guide rail 261 suspended from the lower surface of the top plate 251 a of the upper shell 251 and a lower guide rail 262 erected on the upper surface of the bottom plate 252 a of the lower shell 252 and guiding the upper guide rail 261 .

[0022] In addition, if Fig. 9 and Fig.10As shown, on the front side of the front plate 252b and the back side of the rear plate 252c of the lower housing 252, a guide groove 252b, 252c1 which is long in the vertical direction is provided at the approximate center in the left-right direction. On the inner surface of the front plate 251b and the inner surface of the rear plate 251c of the upper housing 251, protrusions 251b1, 251c1 which are slidably inserted into the guide grooves 252b1, 252c1 are provided corresponding to the guide grooves 252b1, 252c1. The auxiliary guide device 260 guides the movement of the upper housing 251 in the vertical direction by the protrusions 251b1, 251c1 which are slidably provided in the guide grooves 252b1, 252c1.

[0023] Below, in Figures 4 to 6 In the description of the upper guide rail 261 and the lower guide rail 262, since the guide device 260 is symmetrical on the left and right sides, only the upper guide rail 261 and the lower guide rail 262 on the left side are shown for description, and the description of the upper guide rail 261 and the lower guide rail 262 on the right side is omitted.

[0024] like Figure 4 As shown, in the upper rail 261, the upper rail body 261a of approximately long rectangular cylindrical shape and the flat plate-shaped base plate 261b on which the upper rail body 261a is vertically arranged are integrally arranged. Two screw holes 261b1 are arranged opposite to each other on the base plate 261b across the upper rail body 261a. A circular arc-shaped wall portion 261b2 is arranged around the outer side of the screw hole 261b1. In addition, a limiting component 261c is fixedly arranged at the front end of the upper rail body 261a by a screw component 261d. The limiting component 261c cooperates with the upper rail body 261a to form a substantially long rectangular flat plate, and a protrusion 261c1 is arranged on the two short sides, and the protrusion 261c1 is formed to be narrower than the width of the short side direction of the upper rail body 261a and protrudes from the upper rail body 261a. In addition, protrusions 261a1 are provided on the two long sides of the roughly long rectangular shape at the front end of the upper rail body 261a. The protrusions 261a1 engage with the recessed portion 261c2 of the stopper 261c to prevent the stopper 261c from being displaced. A V-shaped groove 261f (also see the V-shaped groove 261f) having a long obtuse angle in the vertical direction is provided at the inner corner of the front side of the upper rail body 261a (the right side in the left guide device 260). Figure 6 ).

[0025] The upper guide rail 261 is mounted on the upper guide rail mounting portion 251a provided on the lower surface of the top plate 251a of the upper shell 251. Two threaded portions 251a11 are provided on the upper guide rail mounting portion 251a11, and the two threaded portions 251a11 are provided in a boss shape and provided with internal threads. A surrounding wall 251a12 is provided around the two threaded portions 251a11. The surrounding wall 251a12 is formed in a roughly U-shape, and the opening side of the roughly U-shape is abutted on the left plate 251d, so as to surround the two threaded portions 251a11. The upper guide rail 261 is fixed to the upper shell 251 by screwing the screw member 261e and the internal threads of the threaded portion 251a11 through each screw hole 261b1.

[0026] like Figure 5 As shown, in the lower guide rail 262, a substantially long rectangular cylindrical lower guide rail body 262a and a substantially long rectangular flat plate-shaped base plate 262b on which the lower guide rail body 262a is vertically provided are integrally provided. On the base plate 262b, two screw holes 262b1 are provided opposite to each other across the lower rail body 262a. The lower surface side of the screw hole 262b1 is countersunk. On the base plate 262b, a cutout 262b2 is provided on the long side of the outer side of the front side. A cutout 262b3 that cuts the corner into a substantially long rectangular shape is provided on the base plate 262b on the diagonal line of the cutout 262b2.

[0027] The lower guide rail 262 is mounted on a lower guide rail mounting portion 252a2 provided on the lower surface side of the lower shell 252. The lower guide rail mounting portion 252a2 is provided in a substantially rectangular concave shape that is long in the front-to-back direction on the lower surface of the bottom plate 252a of the lower shell 252. An opening 252a21 that is substantially rectangular in shape that is long in the front-to-back direction through which the lower guide rail body 262a is inserted is provided on the lower guide rail mounting portion 252a2. On the outside of the opening 252a21 of the lower guide rail mounting portion 252a2, a threaded portion 252a22 and a boss 252a23 corresponding to the cutouts 262b2 and 262b3 are provided in the front and back. An internal thread is provided on the threaded portion 252a22. The lower guide rail 262 is fixedly provided on the lower shell 252 by screwing the screw member 262e with the threaded portion 252a22 via the screw hole 262b1. At this time, the cutouts 262b2 and 262b3 are engaged with the bosses 252a23 to reduce the positional deviation of the lower guide rail 262.

[0028] like Figure 6As shown, on the lower rail body 262a, guide slits 262c that are long in the up-down direction are respectively provided on the two short sides of the substantially long rectangular shape. The guide slit 262c is provided with an upper end stopper 262c1, a lower end stopper 262c2, and a connecting portion 262c3 between the upper end stopper 262c1 and the lower end stopper 262c2. The widths of the upper end stopper 262c1 and the lower end stopper 262c2 are set to be wider than the connecting portion 262c3. In addition, a protrusion 262f is provided at the inner corner of the front side of the lower rail body 262a. The protrusion 262f protrudes in a substantially V-shaped shape with an obtuse angle inside the cylindrical shape of the lower rail body 262a, and is substantially V-groove-shaped and long in the up-down direction outside the cylindrical shape of the lower rail body 262a.

[0029] The upper rail body 261a of the upper rail 261 is inserted into the lower rail body 262a of the lower rail 262 and guided. The upper rail body 261a is slidably engaged with the lower rail body 262a, but the groove 261f of the upper rail body 261a is combined with the protrusion 262f of the lower rail body 262a, thereby reducing looseness. In addition, the two protrusions 261c1 of the upper rail body 261a are inserted into each guide slit 262c and guided. Here, the width of the connecting portion 262c3 of the guide slit 262c is set to be slightly narrower or substantially the same as the width of the protrusion 261c1. Therefore, the protrusion 261c1 (upper rail 261) moves up and down on the connecting portion 262c3 while receiving some resistance. Moreover, when the protrusion 261c1 is located at the upper end stop portion 262c1, the protrusion 261c1 receives resistance at the connecting portion of the upper end stop portion 262c1 and the connecting portion 262c3. Likewise, when the protrusion 261c1 is located at the lower end locking portion 262c2, the protrusion 261c1 receives resistance when the protrusion 261c1 moves upward.

[0030] Therefore, the upper housing 251 is in the closed state ( Figure 2 In the closed state ( Figure 1 In the closed state), since the protrusion 261c1 is located at the lower end stopper 262c2, the upper shell 251 can be prevented from accidentally lifting up. Moreover, during the period when the protrusion 261c1 moves the connecting portion 262c3, that is, even if the hand is released between the upper end and the lower end, the upper shell 251 will not fall and can be stationary at a position away from the hand. In this way, the guide device 260 has a stopper structure (guide slit 262c, protrusion 261c1) in the closed state and the open state.

[0031] Furthermore, even when the key / indicator section 37 is operated in the state where the upper housing 251 is opened, since the key / indicator section 37 is arranged at an inclination, the force pressing the upper housing 251 downward is reduced, thereby reducing the situation where the upper housing 251 falls downward due to the operation of the key / indicator section 37. For example, the inclination angle of the key / indicator section 37 relative to the top plate 251a is θ, and when the key is operated with a force F, the force F' applied to the lower side of the upper housing 251 is F'=F×cosθ.

[0032] Figure 7 1 is a functional circuit block diagram of the projection device 10. The projection device control unit includes a CPU including an image conversion unit 23 and a control unit 38, a front end unit including an input / output interface 22, and a formatter unit including a display encoder 24 and a display driver 26. Image signals of various specifications input from the input / output connector unit 21 are converted into image signals of a prescribed format suitable for display by the image conversion unit 23 via the input / output interface 22 and the system bus SB, and then output to the display encoder 24.

[0033] Furthermore, after the display encoder 24 expands the input image signal and stores it in the video RAM 25 , it generates a video signal based on the storage content of the video RAM 25 and outputs it to the display driver 26 .

[0034] The display drive unit 26 drives the display element 51 as a spatial light modulator (SOM) at an appropriate frame rate corresponding to the image signal output from the display encoder 24. The projection device 10 irradiates the light beam emitted from the light source device 60 to the display element 51 via the light guide optical system, thereby forming a light image using the reflected light of the display element 51, and projects the image onto a projection object such as a screen (not shown) via the projection optical system 220. In addition, the movable lens group 235 of the projection optical system 220 can be driven for zoom adjustment or focus adjustment by the lens motor 45.

[0035] In addition, the image compression / decompression unit 31 performs data compression of the brightness signal and the color difference signal of the image signal by processing such as ADCT and Huffman coding, and sequentially writes the data into the memory card 32 which is a removable storage medium. Furthermore, the image compression / decompression unit 31 reads the image data stored in the memory card 32 in the reproduction mode, decompresses each image data constituting a series of videos in units of one frame, and outputs the data to the display encoder 24 via the image conversion unit 23. Therefore, the image compression / decompression unit 31 can output a video or the like based on the image data stored in the memory card 32.

[0036] The control unit 38 is responsible for the operation control of each circuit in the projection device 10, and is composed of a ROM that fixedly stores operation programs of the CPU and various settings, and a RAM used as a work memory.

[0037] The key / indicator section 37 is composed of a main key and an indicator provided on the housing, etc. The operation signal of the key / indicator section 37 is directly sent to the control unit 38. In addition, the key operation signal from the remote controller is received by the Ir receiving section 35, demodulated into a code signal by the Ir processing section 36, and output to the control section 38.

[0038] The control unit 38 is connected to the audio processing unit 47 via the system bus SB. The audio processing unit 47 includes an audio source circuit such as a PCM audio source, and converts audio data into analog form in the projection mode and the playback mode, and drives the speaker 48 to amplify the sound.

[0039] The control unit 38 controls the light source control circuit 41. The light source control circuit 41 controls the operation of each excitation light irradiation device of the light source device 60 so that light of a predetermined wavelength band required for image generation is emitted from the light source device 60.

[0040] Furthermore, the control unit 38 causes the cooling fan drive control circuit 43 to detect the temperature using a plurality of temperature sensors provided on the light source device 60, etc., and controls the rotation speed of the cooling fan according to the result of the temperature detection. In addition, the control unit 38 also controls the cooling fan drive control circuit 43 to continue the rotation of the cooling fan even after the power of the main body of the projection device 10 is turned off using a timer, etc., or to turn off the power of the main body of the projection device 10 according to the temperature detection result of the temperature sensor.

[0041] like Figure 8 As shown, the projection optical system 220, the light source device 60, the cooling fan 280, the first radiator 281, the second radiator 282, and the third radiator 283 are arranged inside the lower housing 252. The light source device 60 is arranged in the approximate center of the lower housing 252. The light source device 60 includes an excitation light irradiation device 70, a red light source device 120, a green light source device 80, and an optical housing 61. The optical housing 61 has a plurality of optical elements such as lenses and reflectors. On the optical housing 61, a display element 50 as a DMD is installed on the opposite side of the projection optical system 220 and the projection optical system 220. Through the plurality of optical elements arranged on the optical housing 61, the blue, red, and green color band lights emitted from the light source are guided to the display element 50, and image light is generated by the display element 50, and the projection light as the image light generated by the projection optical system 220 is emitted from the projection port 11.

[0042] An excitation light irradiation device 70 connected to the optical housing 61 is disposed substantially at the rear center of the lower housing 252. The excitation light irradiation device 70 is provided with a plurality of blue laser diodes as light sources, and emits blue wavelength band light into the optical housing 61. The excitation light irradiation device 70 is connected to the first heat sink 281 via a heat pipe 72.

[0043] A red light source device 120 connected to the optical housing 61 is disposed substantially in the center of the lower housing 252. The red light source device 120 includes a red LED as a light source and emits red wavelength band light into the optical housing 61. The red light source device 120 is connected to a second heat sink 282 via a heat pipe 123.

[0044] A green light source device 80 connected to the optical housing 61 is arranged on the front side of the approximate center of the lower housing 252. The green light source device 80 has a fluorescent light emitting area as a light source that uses the blue band light from the excitation light irradiation device 70 as excitation light and emits green band light. A fluorescent body that emits green fluorescent light by excitation is provided in the fluorescent light emitting area. In addition, the blue band light from the excitation light irradiation device 70 switches between irradiation to the fluorescent light emitting area and light guidance to the synthetic light path. A plurality of heat sinks (not shown) for heat dissipation are provided on the front side of the green light source device 80.

[0045] A control circuit board 300 is provided on the upper side of the light source device 60. The control circuit board 300 is fixed to the upper surface of the optical housing 61 at a predetermined interval (see also FIG. Figure 3 The control circuit substrate 300 is provided to cover a portion of the optical housing 61 , the excitation light irradiation device 70 , and the green light source device 80 .

[0046] The cooling fan 280 of a blower type using a sirocco fan is arranged on the right rear side of the lower housing 252. The cooling fan 280 is provided with an air inlet 280a on the surface side of the cooling fan 280 and an air inlet 280b on the lower side (see Figure 3 ). In other words, the air intake ports 280a and 280b of the cooling fan 280 are arranged in the up-down direction. The exhaust port 280c of the cooling fan 280 is arranged on the front side. In other words, the exhaust port 280c is arranged in the front-back direction orthogonal to the up-down direction. The power supply circuit substrate 310 is arranged on the lower side of the cooling fan 280.

[0047] A second radiator 282 is disposed on the exhaust port 280c side of the cooling fan 280 (the front side of the cooling fan 280). A first radiator 281 is disposed on the front side of the second radiator 282 (the exhaust port 280c side of the cooling fan 280). In this way, radiators (first radiator 281, second radiator 282) are disposed on the exhaust port 280c side of the cooling fan 280. In addition, since the heat generated from the excitation light irradiation device 70 is higher than that of the red light source device 120, the first radiator 281 connected to the excitation light irradiation device 70 is disposed on the downstream side of the cooling air from the cooling fan 280 compared to the second radiator 282 connected to the red light source device 120.

[0048] The upper side of the lower housing 252 is provided with Figure 8 The duct member 290 is indicated by a double-dashed line in the figure. The duct member 290 is a roughly rectangular plate that is slightly longer in the left-right direction, and the left rear corner is provided with a large cutout in a C-chamfered shape, and the plate surface is arranged in the up-down direction. The duct member 290 is arranged to be placed on the upper end surfaces of the front plate 252b, the rear plate 252c, the left plate 252d, and the right plate 252e in a manner that covers the cooling fan 280, the first radiator 281, the second radiator 282, and a portion of the right side of the light source device 60 or a portion of the right side of the control circuit substrate 300. In other words, the duct member 290 is provided at intervals on the upper side of the cooling fan 280.

[0049] Furthermore, the duct member 290 is arranged on the upper side at a distance from the cooled components including the first radiator 281, the second radiator 282, the heat pipes 71, 123, the control circuit substrate 300, the red light source device 120, and the excitation light irradiation device 70. Moreover, the shape of the duct member 290 is set to correspond to the configuration of the cooled components. The front, rear and right edges of the duct member 290 are consistent with the front surface of the front plate 252b, the back surface of the rear plate 252c and the right surface of the right plate 252e of the lower shell 252. The left edge of the duct member 290 includes: a first edge 290a that is linear in the front-to-back direction in a manner connected to the edge of the front side and a second edge 290b that is connected to the right side from the first edge 290a to the rear edge. The control circuit substrate 300 at a position corresponding to the periphery of the projection optical system 220 and the optical housing 61 connected to the projection optical system 220 and the display element 50 is not covered by the duct member 290 and is exposed.

[0050] An opening 291 is provided at the center front side of the duct member 290 in the left-right direction and penetrates in a substantially long hole shape in the front-back direction. Figure 8In the top view of FIG. 2 , the opening 291 is located directly above the heat pipe 72 between the first heat sink 281, the second heat sink 282 and the green light source device 80, the red light source device 120, and is provided along the extension direction of the heat pipe 72. In addition, the opening 291 is provided corresponding to the first heat sink 281 and the second heat sink 282. A cutout 292 is provided at the right end edge of the duct member 290, corresponding to the right guide device 260, and the cutout 292 is cut out in a manner not to interfere with the right guide device 260.

[0051] like Figure 3 As shown, the duct member 290 is arranged on the upper side of the cooling fan 280. When the upper housing 251 is in an open state moving upward, an internal space S1 of the upper housing 251 is formed on the upper side of the duct member 290 (between the upper housing 251 and the duct member 290). In other words, the duct member 290 is arranged to separate the internal space S1 of the upper housing 251 from the internal space S2 of the lower housing 252. In addition, the internal space S1 almost disappears when the upper housing 251 is in a closed state. Therefore, the internal space S1 only needs to be formed at least when the upper housing 251 moves upward (in an open state). In addition, the duct member 290 is arranged on the upper side of the control circuit substrate 300. A predetermined space S3 is provided between the duct member 290 and the control circuit substrate 300.

[0052] As described above, the projection device 10 is used in a state where the upper housing 251 is moved upward and opened (i.e., the protrusion 261c1 of the upper rail 261 of the guide device 260 is located at the upper end stopper 262c1 of the lower rail 262). During the use of the projection device 10, the cooling fan 280 operates appropriately. The cooling fan 280 sucks air from the air inlets 280a and 280b and exhausts the sucked air from the exhaust port 280c. At this time, since the interior of the housing 250 is under negative pressure, the cooling fan 280 is under negative pressure. Fig. 9 , Fig.10 As shown, cooling air F1 to F3 flows in from the air intake hole 253 of the housing 250. The air discharged from the exhaust port 280c of the cooling fan 280 cools the second radiator 282 and the first radiator 281 in this order, and exhaust air F4 is discharged from the exhaust hole 254a on the front of the lower housing.

[0053] The cooling air F1 flowing in from the lower case front air intake hole 253b of the front plate 252b of the lower case 252 flows into the interior of the lower case 252. The cooling air F1 cools the green light source device 80, passes through the bottom of the control circuit substrate 300, passes through the red light source device 120, the heat pipe 72 side of the excitation light irradiation device 70, etc., and is sucked into the upper and lower air intake ports 280a and 280b of the cooling fan 280.

[0054] The cooling air F2 flowing in from the first lower shell back air intake hole 253c1 in the rear plate 252c of the lower shell 252 cools the third heat sink 283 and the display element 50, flows through the lower side of the control circuit substrate 300, and is sucked into the air intake ports 280a and 280b of the cooling fan 280.

[0055] The cooling air F3 flowing in from the second lower case back side air intake hole 253 c 2 of the rear plate 252 c of the lower case 252 mainly passes through the upper and lower sides of the power circuit substrate 310 and is sucked into the air intake port 280 b on the lower side of the cooling fan 280 .

[0056] Part of the air in the internal space S1 of the upper housing 251 flows into the opening 291 of the duct member 290 as cooling air FN1. The cooling air FN1 passes through the left sides of the first radiator 281 and the second radiator 282, flows rearward along the heat pipe 72, and is mainly sucked into the air intake port 280a on the upper side of the cooling fan 280.

[0057] As shown by the cooling wind FN2, another part of the air in the internal space S1 of the upper housing 251 flows from the first end edge 290a and the second end edge 290b into the lower side of the duct member 290 including the space S3. The cooling wind FN2 flowing into the lower side of the duct member 290 cools the surface side of the control circuit substrate 300, the excitation light irradiation device 70, the green light source device 80, the red light source device 120, etc., and is mainly sucked into the air intake port 280a on the upper side of the cooling fan 280.

[0058] Therefore, the projection device 10 has a first cooling air flow passage FM1 that becomes cooling air FN1 and FN2 on the upper side of the duct member 290, and a second cooling air flow passage FM2 that is formed by the cooling air FN1 and FN2 entering the lower side of the duct member 290 on the lower side of the duct member 290. The duct member 290 makes the flow rate of the cooling air in the second cooling air flow passage FM2 that flows through the narrow space S3 faster, thereby improving the cooling effect. In addition, the cooling air flowing through the second cooling air flow passage FM2 is sucked into the cooling fan 280 via at least a portion of the cooled component.

[0059] When the air in the internal space S1 of the upper housing 251 is sucked in as cooling air FN1 and FN2, and the internal space S1 of the upper housing 251 becomes negative pressure, the cooling air F5 flows in from the upper housing back air intake hole 253a, and fills the internal space S1 with air. In this way, at least a part of the air flowing in from the upper housing back air intake hole 253a is sucked in by the cooling fan 280 via the duct member 290.

[0060] Furthermore, since the duct member 290 is provided with the cutout portion 292 to avoid interference with the guide device 260 , the air in the internal space S1 may also flow into the lower side of the duct member 290 from the cutout portion 292 .

[0061] The light source device 60 is provided with a plurality of blue laser diodes on the excitation light irradiation device 70, and the heat pipe 72 extending from the excitation light irradiation device 70 has a relatively high heat generation. In the vicinity of the right side of the red light source device 120, the heat pipe 123 extending from the red light source device 120 intersects with the heat pipe 72, and the heat pipe 72 passes through the left side vicinity of the first heat sink 281 and the second heat sink 282 having high heat generation, so the portion of the light source device 60 corresponding to the position where the opening 291 of the conduit member 290 is provided has a high heat generation. In addition, the right side of the red light source device 120 is a space S4 that is roughly concave when viewed from above (refer to Figure 8 ), so sometimes the hot air is difficult to flow. Therefore, by arranging the opening 291 correspondingly with the heat pipe 72 extending from the excitation light irradiation device 70 of the light source device 60 and the first heat sink 281, the circulation of the air around the space S4 is enhanced, and the cooling effect is improved. In addition, since the flow path is narrowed by the opening 291, the speed of the cooling wind is accelerated, further improving the cooling effect.

[0062] In addition, in this embodiment, the upper shell 251 can be moved in the vertical direction relative to the lower shell 252 by using the guide device 260, but for example, Fig.11 As shown in the projection device 10A, the structure is provided with a threaded connection structure between the upper shell 251A and the lower shell 252A. The upper shell 251A in the shell 250A of the projection device 10A is a cylindrical shape with a bottom facing the upper side, and is formed into a cylindrical shape with a lower height. An internal thread 256 is provided on the inner surface of the cylinder of the upper shell 251A. On the other hand, an external thread 257 that is screwed with the internal thread 256 is formed on the upper part of the lower shell 252. Through the threaded connection structure of the internal thread 256 and the external thread 257, the upper shell 251A can move in the up-down direction relative to the lower shell 252A. The upper shell 251A moves upward by rotating in the direction of loosening the internal thread 256 and the external thread 257. Then, the internal space of the shell 250A increases by the amount of the upper shell 251A rising. In this way, the position of the expanded space can be arbitrarily set by making the upper shell 251A rise.

[0063] According to the above embodiment of the present invention, the projection device 10 as an electronic device includes: a housing 250, which includes a lower housing 252, 252A and an upper housing 251 that is arranged to be movable in the up-down direction relative to the lower housing 252, 252A, and is provided with an air intake hole 253 and an air exhaust hole 254; a cooling fan 280; a duct member 290 that is arranged at an interval on the upper side of the cooling fan 280 and forms an internal space S1 between the duct member 290 and the upper housing 251, 251A at least when the upper housing 251, 251A moves upward; and a cooled component that includes a first heat sink 281, a second heat sink 282, a heat pipe 71, 123, a control circuit substrate 300, a red light source device 120, and an excitation light irradiation device 70, wherein the duct member 290 is arranged at an interval on the upper side of the cooled component, and the cooling fan 280 causes the air flowing in from the air intake hole 253 to be sucked into the cooling fan at the lower side of the duct member 290 through at least a part of the cooled component.

[0064] Thus, the upper housing 251 can be moved downward to be compact, and when in use, a large internal space S1 is formed on the upper side of the duct member 290, and at least a portion of the air in the internal space S1 is sucked into the cooling fan via the duct member 290, thereby enhancing the cooling of the device disposed inside the lower housing 252. Therefore, it is possible to provide a projection device 10 as an electronic device that can be compact when portable or stored and has an improved cooling effect when in use, for example, by providing the duct member 290 in a plate shape and having a simple structure.

[0065] In addition, the duct member 290 is configured not to be movable along with the movement of the upper housing 251. Thus, the internal space S1 on the upper side of the duct member 290 can be formed larger.

[0066] The shape of the duct member 290 is set to correspond to the arrangement of the cooled member. This allows efficient cooling of the heat sink connected to the light source (excitation light irradiation device 70, red light source device 120) that generates high heat.

[0067] Furthermore, the duct member 290 has an opening 291 for ventilating the upper side and the lower side of the duct member 290. Thus, the air in the internal space S1 can be sent to a portion that is particularly desired to be cooled.

[0068] The opening 291 is provided corresponding to the first heat sink 281 as a heat sink disposed on the exhaust port 280c side of the cooling fan 280. This can enhance the cooling of the first heat sink 281 which generates a large amount of heat.

[0069] In addition, the cooling fan 280 is provided with air intake ports 280a and 280b in the up-down direction, and an exhaust port 280c is provided in a direction perpendicular to the up-down direction. Thus, while forming a flow path of cooling air for cooling the equipment arranged in the space above and below the cooling fan 280, a radiator or other equipment required for cooling can also be arranged on the exhaust port 280c side, thereby making it easy to arrange the equipment.

[0070] The projection device 10 has a first cooling air flow passage FM1 for ventilating the upper side of the duct member 290 and a second cooling air flow passage FM2 for ventilating the lower side of the duct member 290. Thus, cooling air FN1 and FN2 ventilated from the upper side to the lower side of the duct member 290 through the duct member 290 can be generated.

[0071] In addition, the air intake holes 253 include an upper housing back air intake hole 253a provided on the back of the upper housing 251, a lower housing front air intake hole 253b provided on the front of the lower housing 252, and a lower housing back air intake hole 253c provided on the back of the lower housing 252, and the exhaust holes 254 include a lower housing front exhaust hole 254a provided on the front of the lower housing 252. Thus, the inflow of air into the lower housing 252 is ensured, and the inflow of air into the upper housing 251 is also ensured, so that exhaust can be discharged to the front side of the projection device 10.

[0072] In addition, the upper case back air intake hole 253a and the lower case back air intake hole 253c are arranged at positions that do not overlap when the upper case 251 moves downward. Thus, when the projection device 10 is stored or portable, the inflow of dust from the air intake hole 253 can be reduced.

[0073] In addition, the upper shell 251 is configured to be movable in the up and down directions relative to the above-mentioned lower shell by including a guide device 260 including an upper guide rail 261 suspended from the upper shell 251 and a lower guide rail 262 erected on the lower shell 252 and guiding the upper guide rail 261. Therefore, the upper shell 251 can be easily moved up and down by lifting or pressing down the upper shell 251 without complicated operations.

[0074] In addition, the upper housing 251 is provided so as to be movable in the vertical direction relative to the lower housing 252 by a screw connection structure. Thus, the upper housing 251 can be movable in the vertical direction relative to the lower housing 252 with a simple structure.

[0075] In addition, the housing 250 has a key / indicator portion 37, which is an operation panel provided on the surface in an inclined manner so as to rise from the rear side to the front side. Thus, even if the key / indicator portion 37 is used to operate while the upper housing 251 is moved upward, the upper housing 251 can be prevented from being accidentally pressed down.

[0076] In addition, the embodiments described above are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the subject matter of the invention. These embodiments and their variations are included in the scope or subject matter of the invention, and are included in the invention described in the claims and the scope of their equivalents.

Claims

1. An electronic device, characterized in that: have: A housing, comprising a lower housing and an upper housing arranged to be movable in the up-down direction relative to the lower housing, and provided with an air intake hole and an air exhaust hole; Cooling fan; a duct member which is provided at an interval on the upper side of the cooling fan and forms an internal space between the duct member and the upper housing at least when the upper housing moves upward; and The cooled parts The conduit components are arranged at intervals on the upper side of the cooled component. The cooling fan causes the air flowing in from the air intake hole to be sucked into the cooling fan through at least a portion of the cooled member at a lower side of the duct member.

2. The electronic device according to claim 1, characterized in that: The duct member is configured not to be movable along with the movement of the upper housing.

3. The electronic device according to claim 1, characterized in that: The shape of the duct member is set to correspond to the configuration of the cooled member.

4. The electronic device according to claim 2, characterized in that: The duct member has an opening for ventilating an upper side and a lower side of the duct member.

5. The electronic device according to claim 4, characterized in that: The opening is provided corresponding to a heat sink disposed on the exhaust port side of the cooling fan.

6. The electronic device according to claim 1, characterized in that: The cooling fan is provided with an air intake port in the up-down direction and an air discharge port in a direction perpendicular to the up-down direction.

7. The electronic device according to claim 1, characterized in that: A first cooling air flow passage for ventilating the upper side of the duct member and a second cooling air flow passage for ventilating the lower side of the duct member are provided.

8. The electronic device according to claim 1, characterized in that: The air intake holes include: an upper shell back air intake hole, which is arranged on the back of the upper shell; a lower shell front air intake hole, which is arranged on the front of the lower shell; and a lower shell back air intake hole, which is arranged on the back of the lower shell. The exhaust hole includes a lower shell front exhaust hole arranged on the front side of the lower shell.

9. The electronic device according to claim 8, characterized in that: The air intake hole on the back of the upper shell and the air intake hole on the back of the lower shell are arranged at positions that do not overlap when the upper shell moves downward.

10. The electronic device according to claim 1, characterized in that: The upper shell is arranged to be movable in the up-down direction relative to the lower shell through a guide device, and the guide device includes an upper guide rail suspended from the upper shell and a lower guide rail erected on the lower shell and guiding the upper guide rail.

11. The electronic device according to claim 1, characterized in that: The upper housing is configured to be movable in an up-down direction relative to the lower housing through a threaded connection structure.

12. The electronic device according to any one of claims 1 to 11, characterized in that: The housing has an operation panel provided on a surface obliquely in a manner rising from the rear side to the front side.

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