CN113917772A

CN113917772A - Projector

Info

Publication number: CN113917772A
Application number: CN202111205817.9A
Authority: CN
Inventors: 陈禅豪; 江浩; 谭大治; 欧阳飞
Original assignee: Formovie Chongqing Innovative Technology Co Ltd
Current assignee: Formovie Chongqing Innovative Technology Co Ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-01-11

Abstract

The embodiment of the invention relates to a projector, which comprises a shell, an optical machine and a fan, wherein the shell comprises a metal shell, and the metal shell is provided with an air inlet hole and an air outlet hole; the optical machine is fixed on the metal shell through a heat insulation assembly, a first interval is arranged between the optical machine and the metal shell, and the first interval is communicated with the air inlet hole; the fan set up in the ray apparatus deviates from one side of fresh air inlet, the air intake of fan with first interval intercommunication, the air outlet of fan with the exhaust vent intercommunication. By the scheme, the heat dissipation problem of the optical machine is solved, and the temperature of the metal shell is effectively reduced.

Description

Projector

Technical Field

The invention relates to the field of projection, in particular to a projector.

Background

A projector is a device that can project videos, images, or characters onto a screen for display, and is widely used in places such as homes, offices, schools, or movie theaters.

Because the metal shell has the advantages of clean and smooth surface, good integral continuity, beautiful appearance, good wear resistance and corrosion resistance, high strength and the like, more and more projectors start to adopt the metal shell. With the development of technology, consumers have made higher demands on the small size and portability of projectors. For a metal-shell micro projector, a light source and an optical modulator in the optical machine can generate a large amount of heat in the working process, and if the heat in the optical machine cannot be discharged in time, the performance of the light source and the optical modulator can be seriously influenced; because the device of miniature projector arranges closely, the heat in the ray apparatus can transmit to metal casing on, leads to metal casing to send out to scald even the hand, influences user experience.

Disclosure of Invention

The invention aims to provide a projector to solve the problems of light machine heat dissipation and excessive temperature of a metal shell of a micro projector in the prior art.

The technical scheme for solving the technical problems is as follows: the projector comprises a shell, an optical machine and a fan, wherein the shell comprises a metal shell, and an air inlet and an air outlet are formed in the metal shell; the optical machine is fixed on the metal shell through a heat insulation assembly, a first interval is arranged between the optical machine and the metal shell, and the first interval is communicated with the air inlet hole; the fan set up in the ray apparatus deviates from one side of fresh air inlet, the air intake of fan with first interval intercommunication, the air outlet of fan with the exhaust vent intercommunication.

Further, metal casing include first panel and connect in first curb plate and the second curb plate at first panel edge, the exhaust vent set up in on the first curb plate, the fresh air inlet set up in on the second curb plate.

Further, the first panel epirelief is equipped with a plurality of fixed parts, the ray apparatus is fixed in a plurality of through a plurality of thermal-insulated subassemblies on the fixed part.

Further, be equipped with the screw hole on the fixed part, be equipped with on the ray apparatus with the through-hole that the screw hole is relative, thermal-insulated subassembly includes metal screw and heat insulating part, metal screw passes the through-hole with the screw hole spiro union is in order to fix the ray apparatus on the fixed part, heat insulating part sets up the ray apparatus with the fixed part with between the metal screw.

Further, the heat insulating part includes first heat insulating mattress and second heat insulating mattress, metal screw passes in proper order first heat insulating mattress the through-hole with the second heat insulating mattress with the screw hole spiro union, first heat insulating mattress sets up the ray apparatus with between the fixed part, the second heat insulating mattress sets up the ray apparatus with between the nut of metal screw.

Further, be equipped with the screw hole on the fixed part, be equipped with on the ray apparatus with the through-hole that the screw hole is relative, thermal-insulated subassembly includes plastics screw and third heat insulating mattress, the plastics screw passes in proper order the through-hole third heat insulating mattress with the screw hole spiro union is in order to fix the ray apparatus on the fixed part, the third heat insulating mattress sets up the ray apparatus with between the fixed part.

Further, the heat insulation assembly further comprises a fourth heat insulation pad, and the fourth heat insulation pad is arranged between the light machine and a nut of the plastic screw.

Further, the projector further comprises a first radiator, the first radiator is located between the air inlet hole of the second side plate and the fan, the second radiator is connected to one side of the optical machine, which is far away from the first side plate, and the first radiator and the first panel are provided with a second interval.

Further, the projector further comprises a second radiator, the second radiator is located between the air outlet of the first side plate and the air outlet of the fan, the second radiator is connected to one side of the optical machine, which deviates from the second side plate, and the second radiator and the first side plate have a third interval.

Further, the shell further comprises a plastic side plate assembly, the plastic side plate assembly is arranged on the first side plate, and heat dissipation holes opposite to the outlet holes are formed in the plastic side plate assembly.

The invention has the beneficial effects that: according to the projector provided by the invention, the optical machine is fixed on the metal shell through the heat insulation assembly, and the heat insulation assembly prevents the rapid heat transfer of metal, so that the heat on the optical machine is left on the optical machine and is not directly conducted to the metal shell; a first interval is formed between the optical machine and the metal shell, an active heat dissipation air channel is formed by the air inlet hole in the metal shell, the first interval, the fan and the air inlet hole in the metal shell, and the fan rotates to enable cooling air to pass through the first interval between the optical machine and the metal shell to take away heat on the optical machine and avoid heat accumulation; in addition, the fan sets up in the one side that the ray apparatus deviates from the fresh air inlet, and fan and ray apparatus tiling setting have guaranteed that the projector has thin thickness, are favorable to the miniaturization of projector.

Drawings

Fig. 1 is an exploded view of a projector according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a projector according to an embodiment of the invention;

fig. 3 is a cross-sectional view of a projector according to an embodiment of the invention.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, 2, and 3, a projector 100 according to the present invention includes: the optical-mechanical device comprises a shell, an optical-mechanical device 110 and a fan 120, wherein the shell comprises a metal shell 130, and the metal shell 130 is provided with an air inlet and an air outlet; the optical machine 110 is fixed on the metal shell 130 through a heat insulation assembly, and a first interval is arranged between the optical machine 110 and the metal shell 130 and is communicated with the air inlet hole; the fan 120 is disposed on a side of the optical machine 110 away from the air inlet, the air inlet of the fan 120 is communicated with the first space, and the air outlet of the fan 120 is communicated with the air outlet.

The invention has the beneficial effects that: in the projector 100 provided by the invention, the optical engine 110 is fixed on the metal shell 130 through the heat insulation component, and the heat insulation component prevents the rapid heat transfer of metal, so that the heat on the optical engine 110 is left on the optical engine 110 and is not directly conducted to the metal shell 130; and form first interval between ray apparatus 110 and the metal casing 130, the fresh air inlet on the metal casing 130, first interval, fan 120 and the fresh air inlet 132 on the metal casing 130 form the active heat dissipation wind channel, fan 120 rotates and makes the cooling air pass through the first interval between ray apparatus 110 and the metal casing 130, take away the heat on the ray apparatus 110, avoid the heat gathering, above-mentioned scheme is through the cooperation of thermal-insulated subassembly and first interval, both solved the heat dissipation problem of ray apparatus 110, the temperature of metal casing 130 has effectively been reduced again, in addition, fan 120 sets up in the one side that deviates from the fresh air inlet of ray apparatus 110, fan 120 and ray apparatus 110 tiling set up, guaranteed that projector 110 has thin thickness, be favorable to the miniaturization of projector 110 volume.

The metal case 130 may be made of aluminum alloy, stainless steel, magnesium alloy, or titanium alloy. The metal shell 130 has the advantages of high strength, wear resistance, corrosion resistance and the like, and the surface is clean and smooth and the whole continuity is good. The metal housing 130 includes a first panel 131, and a first side plate 132 and a second side plate 133 connected to an edge of the first panel 131, wherein the air outlet is disposed on the first side plate 132, and the air inlet is disposed on the second side plate 133. The shapes of the air inlet holes and the air outlet holes can be round, square, long strip, oval, regular pentagon, regular hexagon or other shapes. It can be understood that the shapes, sizes, or numbers of the air inlet holes and the air outlet holes can be set according to actual situations, and are not specifically limited herein.

The metal housing 130 further includes a third side plate 134 and a fourth side plate 135 connected to edges of the first panel 131, the first side plate 132 is opposite to the third side plate 134, the second side plate 133 is opposite to the fourth side plate 135, the first panel 131, the first side plate 132, the second side plate 133, the third side plate 134 and the fourth side plate 135 together form an accommodating cavity with an opening, and devices such as the optical engine 110 and the fan 120 are installed in the cavity. The housing further includes a plastic casing 140, and the plastic casing 140 is substantially flat and covers the opening of the metal casing 130. The plastic housing 140 may be made of PC, ABS, PC + ABS or PS. The metal housing 130 and the plastic housing may be detachably connected by a snap, a screw lock, or the like, or may be connected by bonding or welding. Preferably, the metal housing 130 is a top case of the projector 100, the plastic housing 140 is a bottom case of the projector 100, the first panel 131 is a top plate of the outer case, the plastic housing 140 is a bottom plate of the outer case, and the plastic housing 140 covers a downward opening of the metal housing 130. By providing the plastic housing 140 at the bottom of the metal housing 130, the user can only see the metal housing 130 when the projector 100 is placed on a table.

The optical engine 110 includes an optical housing, and optical elements such as a light source and an optical modulator are installed in an internal cavity of the optical housing and used for forming a projection picture. Both the light source and the light modulator generate heat during operation, causing the temperature of the light engine 110 to increase.

In an embodiment, a plurality of fixing portions 136 are protruded from the inner side surface of the first panel 131, and the optical engine 110 is fixed to the fixing portions 136 through a plurality of heat insulation components. The fixing portion 136 has a certain height so that a first interval is formed between the optical engine 110 and the first panel 131. The fixing portion 136 is made of a metal material, and the fixing portion 136 may be integrally formed with the first panel 131 and may be welded to the first panel 131, so that the structural stability of the fixing portion 136 is ensured, and the optical machine 110 is supported and fixed by sufficient strength.

The fixing portion 136 is provided with a threaded hole, the optical machine 110 is provided with a through hole opposite to the threaded hole, the heat insulation assembly comprises a metal screw 150 and a heat insulation piece, the metal screw 150 penetrates through the through hole of the optical machine 110 and is in threaded connection with the threaded hole to fix the optical machine 110 on the fixing portion 136, and the heat insulation piece is arranged between the optical machine 110 and the fixing portion 136 and between the fixing portion 136 and the metal screw 150. The heat insulation piece can be made of plastics such as nylon, PVC, PP, and the like, and by arranging the heat insulation piece between the optical machine 110 and the fixing part 136 and the metal screw 150, the direct contact between the optical machine 110 and the fixing part 136 and the metal screw 150 is avoided, the heat on the optical machine 110 is prevented from being transferred to the metal shell 130 through the metal fast heat, and the temperature of the metal shell 130 is reduced.

Specifically, the heat insulation member includes a first heat insulation pad 161 and a second heat insulation pad 162, the first heat insulation pad 161 and the second heat insulation pad 162 are annular, the metal screw 150 sequentially passes through the first heat insulation pad 161, the through hole and the second heat insulation pad 162 to be screwed with the threaded hole on the fixing portion, the first heat insulation pad 161 is disposed between the optical engine 110 and the fixing portion 136, and the second heat insulation pad 162 is disposed between the optical engine 110 and the nut of the metal screw 150. The first and second

heat insulating pads

161 and 162 insulate the optical machine 110 from the fixing portion 136, the optical machine 110 from the metal screw 150, and prevent heat on the optical machine 110 from being transferred to the metal housing 130. In other embodiments, the thermal insulation member may further include a thermal insulation sleeve, and a first thermal insulation pad and a second thermal insulation pad respectively connected to two ends of the thermal insulation sleeve, in a specific installation structure, the thermal insulation sleeve is sleeved on the metal screw 150, the first thermal insulation pad is disposed between the optical engine 110 and the fixing portion 136, and the second thermal insulation pad is disposed between the optical engine 110 and the nut of the metal screw 150.

In another embodiment, unlike the previous embodiment, the thermal insulation assembly includes a plastic screw made of nylon, PC, PVDF, PP, PTFE, etc. and a third thermal insulation pad as the thermal insulation member made of nylon, PVC, PP, etc. plastic. The plastic screw passes through the through hole, the third heat insulation pad and the screw hole in turn to fix the optical machine 110 on the fixing part 136, and the third heat insulation pad is arranged between the optical machine 110 and the fixing part 136. The insulation assembly may also include a fourth insulation pad disposed between the light engine 110 and the nut of the plastic screw. In this embodiment, the optical machine 110 is fixed on the fixing portion 136 by the plastic screws, and the third heat insulation pad is disposed between the optical machine 110 and the fixing portion 136, so that the heat conductivity of the plastic is low, and the heat insulation effect is better than that of a scheme using metal screws.

In the two embodiments, the optical machine 110 is fixed on the fixing portion 136 through the heat insulation assembly including the screws and the heat insulation member, and the heat insulation member is disposed between the optical machine 110 and the fixing portion 136 and the screws, so that the problem that the temperature of the metal housing 130 is too high due to the fact that heat on the optical machine 110 is transferred to the fixing portion or the screws is avoided.

The fan 120 is disposed on one side of the optical machine 110 departing from the air inlet hole through a support or a bracket fixed on the inner side of the first panel 131, the fan 120 is a turbofan, a fourth gap is provided between the fan 120 and the first panel 131, an air inlet of the fan 120 is disposed on a surface of the fan 120 facing the first panel 131, and an air outlet of the fan 120 is disposed on the first side plate 132 facing the first housing. The air inlet of the fan 120 is communicated with the first space between the optical machine 110 and the first panel 131 through the fourth space. When the projector 100 is in operation, the fan 120 rotates to make the cooling air enter the housing from the air inlet, and then pass through the first space between the optical engine 110 and the first panel 131 to take away the heat on the optical engine 110, and then the inner fan 120 sucks the cooling air and blows the cooling air to the air outlet. In the above scheme, the heat dissipation problem of the optical machine 110 is solved and the temperature of the metal shell 130 is effectively reduced through the cooperation of the heat insulation assembly and the first interval.

In an embodiment, the projector 100 further includes a first heat sink 170, the first heat sink 170 is located between the air inlet of the second side plate 133 and the fan 120, the first heat sink 170 is connected to a side of the optical engine 120 away from the first side plate 132, and the first heat sink 170 and the first panel 131 have a second interval. The first heat sink 170 is connected to a side of the optical engine 110 away from the first side plate 132, and accordingly, the optical modulator (such as a DMD) is disposed at a side of the optical engine housing internal cavity of the optical engine 110 close to the first heat sink 170, so that heat generated by the optical modulator can be rapidly transferred to the first heat sink 170, a second interval is formed between the first heat sink 170 and the first panel 131, thereby preventing the first heat sink 170 from directly contacting the first panel 131, causing the heat on the first heat sink 170 to be transferred to the first panel 131, and causing the local temperature of the metal housing 130 to be too high, thereby effectively reducing the temperature of the metal housing 130.

Further, the projector 100 further includes a second heat sink 180, the second heat sink 180 is located between the air outlet of the first side plate 132 and the air outlet of the fan 120, the second heat sink 180 is connected to a side of the optical engine 110 away from the second side plate 133, and the second heat sink 180 and the first panel 131 have a third interval. Specifically, the second heat sink 180 is connected to a side of the optical machine 110 away from the second side plate 133, and accordingly, the light source (such as an LED light source or a laser light source) is disposed at a side close to the second heat sink 180 or the first side plate 132 in the cavity inside the optical machine housing of the optical machine 110, so that heat generated by the light source can be rapidly transferred to the second heat sink 180, a third interval is formed between the second heat sink 180 and the first panel 131, so as to prevent the second heat sink 180 from directly contacting the first panel 131, so that heat on the second heat sink 180 is directly transferred to the first panel 131, and thus, local temperature of the metal housing 130 is too high, and thus, the temperature of the metal housing 130 is effectively reduced.

The first heat sink 170 includes a plurality of first heat dissipating fins disposed at intervals, a first channel for conducting air flow is disposed between two adjacent first heat dissipating fins, one end of the first channel faces the air inlet of the second side plate 133, and the other end of the first channel faces the fan 120.

The second heat sink 180 includes a plurality of second heat dissipating fins disposed at intervals, a second channel for conducting airflow is disposed between two adjacent second heat dissipating fins, one end of the second channel faces the air outlet of the first side plate 132, and the other end of the second channel faces the air outlet of the fan 120, preferably, the second heat sink 180 and the air outlet of the fan 120 are tightly connected, so as to further improve heat dissipating efficiency.

After the cooling air takes away the heat of the optical machine 110, the cooling air is discharged out of the housing through the air outlet, and the air outlet is arranged on the first side plate 132 of the metal, so that the heat in the cooling air can be transferred to the metal shell 130, and the temperature of the metal shell 130 is too high. In order to solve the above problem, at least the area of the first side plate 132 corresponding to the air outlet of the fan 120 or the second heat sink 180 is hollowed to form a first opening area, the first opening area forms an air outlet on the first side plate 132, the projector 100 further includes a plastic side plate assembly 190, the plastic side plate assembly 190 is disposed on the first side plate 132, and the plastic side plate assembly 190 is provided with heat dissipation holes opposite to the air outlet. The plastic side plate assembly is made of PC, ABS, PC + ABS or PS and the like, the heat transfer rate is low, cooling air blown out by the fan 120 is discharged through the heat dissipation holes in the plastic side plate assembly 190, heat in the cooling air is prevented from being transferred to the metal shell 130, and the problem of the metal shell can be effectively reduced.

Preferably, the first side plate 132 is a front panel of the housing of the projector 100, a first opening region 137 and a second opening region 138 opposite to the lens of the optical engine 110 are formed in the first side plate 132, the plastic side plate assembly 190 is a front housing assembly of the projector 100, the plastic side plate assembly 190 includes a plastic support 191 and a plastic cover plate 192, the plastic support 191 is fixedly disposed on the first side plate 132, the plastic support 191 is formed with a heat dissipation window 194 corresponding to the first opening region 137 and a lens window 193 corresponding to the second opening region 138, the plastic cover plate 192 is provided with a plurality of heat dissipation holes 195, and the plurality of heat dissipation holes 195 correspond to the heat dissipation window 194 and the first opening region 137, so that the cooling air blown by the fan 120 sequentially passes through the first opening region 137, the heat dissipation window 194 and the heat dissipation holes 195 and flows out of the housing. The plastic cover 192 may be slidably disposed on the plastic bracket 191, and the plastic cover 192 may cover or expose the lens of the optical engine 110 by sliding. In other embodiments, the plastic side plate assembly 190 may include only a plastic cover plate, the plastic cover plate is fixedly disposed on the first side plate 132, and the plastic cover plate is provided with a plurality of heat dissipation holes corresponding to the first opening region.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A projector comprises a shell, an optical machine and a fan, and is characterized in that,

the shell comprises a metal shell, and an air inlet hole and an air outlet hole are formed in the metal shell;

the optical machine is fixed on the metal shell through a heat insulation assembly, a first interval is arranged between the optical machine and the metal shell, and the first interval is communicated with the air inlet hole;

the fan set up in the ray apparatus deviates from one side of fresh air inlet, the air intake of fan with first interval intercommunication, the air outlet of fan with the exhaust vent intercommunication.

2. The projector as claimed in claim 1, wherein the metal housing includes a first panel, and a first side plate and a second side plate connected to an edge of the first panel, the air outlet is disposed on the first side plate, and the air inlet is disposed on the second side plate.

3. The projector as claimed in claim 2, wherein a plurality of fixing portions are protruded from the first panel, and the optical engine is fixed to the plurality of fixing portions by a plurality of heat insulating members.

4. The projector as claimed in claim 3, wherein the fixing portion has a threaded hole, the carriage has a through hole opposite to the threaded hole, the thermal insulation assembly includes a metal screw and a thermal insulation member, the metal screw passes through the through hole and is screwed with the threaded hole to fix the carriage on the fixing portion, and the thermal insulation member is disposed between the carriage and the fixing portion and the metal screw.

5. The projector as claimed in claim 4, wherein the heat-insulating member includes a first heat-insulating pad and a second heat-insulating pad, the metal screw passes through the first heat-insulating pad, the through hole and the second heat-insulating pad in turn to be screwed with the threaded hole, the first heat-insulating pad is disposed between the optical engine and the fixing portion, and the second heat-insulating pad is disposed between the optical engine and a nut of the metal screw.

6. The projector as claimed in claim 3, wherein the fixing portion has a threaded hole, the carriage has a through hole opposite to the threaded hole, the thermal insulation assembly includes a plastic screw and a third thermal insulation pad, the plastic screw sequentially passes through the through hole, the third thermal insulation pad is screwed with the threaded hole to fix the carriage on the fixing portion, and the third thermal insulation pad is disposed between the carriage and the fixing portion.

7. The projector of claim 6, wherein the thermal insulation assembly further comprises a fourth thermal insulation pad disposed between the light engine and a nut of the plastic screw.

8. The projector of any of claims 1-7, further comprising a first heat sink positioned between the air inlet aperture of the second side plate and the fan, the second heat sink coupled to a side of the optical engine facing away from the first side plate, the first heat sink spaced a second distance from the first side plate.

9. The projector of claim 8, further comprising a second heat sink positioned between the air outlet of the first side plate and the air outlet of the fan, the second heat sink being connected to a side of the optical engine facing away from the second side plate, and the second heat sink being spaced from the first side plate by a third distance.

10. The projector of claim 2, wherein the housing further comprises a plastic skirt assembly disposed on the first skirt, the plastic skirt assembly having a heat dissipation aperture disposed opposite the exit aperture.