CN210776144U

CN210776144U - Sealed projector

Info

Publication number: CN210776144U
Application number: CN201922158640.6U
Authority: CN
Inventors: 徐宝山; 刘雄辉; 吴汉兴
Original assignee: Guangzhou Rigal Electronics Co ltd
Current assignee: Guangzhou Rigal Electronics Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-06-16
Anticipated expiration: 2029-12-05

Abstract

The utility model discloses a sealed projecting apparatus, include the shell, locate seal shell in the shell, locate imaging light path subassembly in the seal shell and locating the light source subassembly between seal shell and the shell, the light-emitting end of light source subassembly with seal shell's income light mouth sealing connection, imaging light path subassembly the light-emitting end with seal shell's light-emitting mouth sealing connection. The sealed projector has the beneficial effects of sealing, dust prevention and efficient heat dissipation.

Description

Sealed projector

Technical Field

The utility model relates to a projecting apparatus field especially relates to a sealed projecting apparatus.

Background

The heat dissipation system of the LCD projector generally adopts an open design, which is basically the design idea of air inlet → fan → optical device (mainly LCD screen) needing heat dissipation → fan (determined according to the power of the whole machine is needed) → light source radiator → air outlet. Therefore, floating dust in the air is easy to enter the LCD projector along with fresh air and is adsorbed on the LCD screen, so that black spots appear on a projection picture, which is an industry pain point of the LCD projector. Even if a dust screen is added at the air inlet during design and the whole production link is finished in a dust-free workshop, the occurrence of black spots cannot be completely avoided, and the generation of the black spots can be only partially reduced.

In order to solve the above technical problems, in the prior art, a sealing housing is generally added in the LCD projector, the whole optical main body is disposed in the sealing housing, then the heat generated by the optical main body is led out from the sealing housing through a heat conducting element, and then the heat is dissipated by a heat dissipating fan.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a sealed projector has sealed dustproof and high-efficient radiating beneficial effect concurrently.

The utility model discloses the technical problem that will solve realizes through following technical scheme:

a sealed projector comprises a shell, a sealed shell arranged in the shell, an imaging light path component arranged in the sealed shell and a light source component arranged between the sealed shell and the shell, wherein the light outlet end of the light source component is hermetically connected with the light inlet of the sealed shell, and the light outlet end of the imaging light path component is hermetically connected with the light outlet of the sealed shell.

Further, a heat dissipation system is also included.

Furthermore, the heat dissipation system comprises a heat absorption fin, a heat dissipation plate, a heat conduction pipe and a heat dissipation fin which are sequentially connected, wherein the heat absorption fin is arranged in the sealing shell, the heat dissipation plate is arranged on the sealing shell, and the heat conduction pipe and the heat dissipation fin are arranged between the sealing shell and the shell.

Further, the heat dissipation system further comprises a heat dissipation fan, and the heat dissipation fan is arranged between the sealed shell and the shell.

Further, the sealed shell comprises a base and a top cover connected with the base in a sealing mode.

Further, the base and the shell are of an integral structure.

Further, the imaging light path component sequentially comprises a collimating lens, an LCD screen, a focusing lens, a reflector and an imaging lens along a light path, and the imaging lens is arranged in the light outlet of the sealing shell and is connected with the light outlet in a sealing mode.

Further, the collimating lens and/or the focusing lens is a fresnel lens.

Furthermore, a first assembly groove, a second assembly groove, a third assembly groove, a fourth assembly groove and a fifth assembly groove are sequentially formed in the sealing shell, the light-emitting end of the light source assembly and the collimating lens are assembled in the first assembly groove together, the LCD screen is assembled in the second assembly groove, the focusing lens is assembled in the third assembly groove, the reflector is assembled in the fourth assembly groove, and the imaging lens is assembled in the fifth assembly groove.

Furthermore, the light source assembly comprises an LED light source and a light funnel, wherein an opening at one end of the light funnel is hermetically connected with the LED light source, and the other end of the light funnel is hermetically connected with a light inlet of the sealing shell.

The utility model discloses following beneficial effect has: this sealed projecting apparatus divide into light source subassembly and formation of image light path subassembly two parts with its optical main part, will give out heat great light source subassembly locate outside the sealed casing and with sealed casing sealing connection to guarantee high-efficient heat dissipation and sealed dustproof, will give out heat less formation of image light path subassembly set up in seal in the sealed casing seals in order to prevent that the formation of image light path from advancing dirt, has had sealed dustproof and high-efficient radiating beneficial effect concurrently.

Drawings

Fig. 1 is an internal structure view of a sealed projector according to the present invention;

fig. 2 is an exploded internal view of a sealed projector according to the present invention;

fig. 3 is a schematic view of an optical main body of the sealed projector according to the present invention;

fig. 4 is a schematic view of a heat dissipation system of a sealed projector according to the present invention;

fig. 5 is a schematic diagram of a thermal cycle of the sealed projector according to the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, a sealed projector includes a housing 1, a sealed casing 2 disposed in the housing 1, an imaging optical path component 3 disposed in the sealed casing 2, and a light source component 5 disposed between the sealed casing 2 and the housing 1, where the housing 1 has an air inlet and a lens port 13, the sealed casing 2 has a light inlet and a light outlet, the light inlet of the sealed casing 2 is on the same side as the air inlet of the housing 1, and the light outlet of the sealed casing 2 is opposite to the lens port 13 of the housing 1; the light-emitting end of the light source component 5 is connected with the light-entering port of the sealing shell 2 in a sealing mode, and the light-emitting end of the imaging light path component 3 is connected with the light-emitting port of the sealing shell 2 in a sealing mode.

This sealed projecting apparatus divide into light source subassembly 5 and formation of image light path subassembly 3 two parts with its optical main part, will give out heat great light source subassembly 5 locate sealed casing 2 outer and with sealed casing 2 sealing connection to guarantee high-efficient heat dissipation and sealed dustproof, will give out heat less formation of image light path subassembly 3 set up in seal in the sealed casing 2 and seal in order to prevent that the formation of image light path from advancing dirt, have had sealed dustproof and high-efficient radiating beneficial effect concurrently.

Preferably, a dust screen is arranged at the tuyere of the shell 1.

The sealed projector further comprises a heat dissipation system 4, wherein, as shown in fig. 3 and 4, the heat dissipation system 4 comprises a heat absorbing fin 41, a heat dissipation plate 42, a heat conducting pipe 43 and a heat dissipating fin 44 which are connected in sequence, and is used for leading out heat in the sealed housing 2 to the outside of the sealed housing 2 for heat dissipation. The heat absorbing fin 41 is arranged in the sealed shell 2 and used for absorbing heat in the sealed shell 2; the heat dissipation plate 42 is disposed on the sealed housing 2, and at least partial areas are exposed on the inner side and the outer side of the sealed housing 2, respectively, so as to directly dissipate part of the heat absorbed by the heat absorbing fins 41 to the outside of the sealed housing 2, and also transfer part of the heat absorbed by the heat absorbing fins 41 to the heat conduction pipe 43; the heat conducting pipes 43 and the heat dissipating fins 44 are disposed between the sealed housing 2 and the casing 1, and are used for conducting heat transferred from the heat dissipating plate 42 to a predetermined position outside the sealed housing 2 for heat dissipation.

The heat absorbing fins 41, the heat dissipating plate 42, the heat conducting pipes 43 and the heat dissipating fins 44 may be made of, but not limited to, stainless steel, copper or aluminum, wherein the heat conducting pipes 43 may be solid pipes or hollow pipes; the heat absorbing fins 41, the heat dissipating plate 42, the heat pipe 43, and the heat dissipating fins 44 may be fixed by welding or by bonding with a heat conductive adhesive in this order.

The heat dissipation system 4 further includes a heat dissipation fan 45 for discharging heat between the hermetic container 2 and the casing 1 from the air opening. The heat dissipation fan 45 is disposed between the sealing case 2 and the casing 1, and corresponds to the air opening.

In the scheme, two air ports are arranged on the shell 1, namely a first air port 11 and a second air port 12; the number of the heat dissipation fans 45 is also two, and the heat dissipation fans are respectively a first fan 45a and a second fan 45b which are correspondingly arranged at the first air port 11 and the second air port 12 of the shell 1; the number of the heat conduction pipes 43 and the number of the heat dissipation fins 44 are two, namely, a first heat conduction pipe 43a and a second heat conduction pipe 43b, and a first heat dissipation fin 44a and a second heat dissipation fin 44b, respectively, where the first heat dissipation fin 44a and the second heat dissipation fin 44b correspond to the first fan 45a and the second fan 45b, respectively, the first heat conduction pipe 43a is connected between the heat dissipation plate 42 and the first heat dissipation fin 44a, and the second heat conduction pipe 43b is connected between the heat dissipation plate 42 and the second heat dissipation fin 44 b; as shown by the solid arrows in fig. 5, the first heat conduction pipes 43a and the first heat dissipation fins 44a lead the heat transferred from the heat dissipation plate 42 to the first fans 45a and are discharged from the first air ports 11, and the second heat conduction pipes 43b and the second heat dissipation fins 44b lead the heat transferred from the heat dissipation plate 42 to the second fans 45b and are discharged from the second air ports 12.

The hollow arrows in fig. 5 indicate the internal circulation of heat inside the hermetic shell 2.

The sealed housing 2 includes a base 21 and a top cover 22 sealingly connected to the base 21.

In the present disclosure, the heat dissipation plate 42 is disposed on the outer side of the top cover 22, and the top cover 22 is provided with a plurality of hollow holes so that the heat dissipation plate 42 is exposed to at least a partial region of the inner side of the top cover 22; the light inlet and the light outlet of the sealed shell 2 are formed by the base 21 and the top cover 22 after covering the box.

Preferably, the base 21 and the housing 1 are of an integral structure, and are integrally formed with the housing 1 by injection molding.

Imaging optical path subassembly 3 includes collimating lens 31, LCD screen 32, focusing lens 33, speculum 34 and imaging lens 35 along the light path in proper order, imaging lens 35 locates in the light-emitting window of sealed casing 2 and with light-emitting window sealing connection.

Light that light source subassembly 5 sent passes through collimating lens 31 forms collimated light after handling, projects uniformly on LCD screen 32, sees through LCD screen 32's light passes through focusing lens 33 is handled and is formed focused light, passes through reflector 34 reflection behind 45 passes through imaging lens 35 enlargies and forms projection light, outwards carries out the projection finally.

In this case, the heat absorbing fins 41 are located on the back surface of the reflector 34, and the circuit board of the LCD panel 32 is attached to the heat absorbing fins 41 to transfer the generated heat to the heat absorbing fins 41, and then the heat is dissipated to the outside of the sealed case 2 through the heat dissipating system 4.

The collimating lens 31 and/or the focusing lens 33 may be, but not limited to, a fresnel lens, and the material may be, but not limited to, a plastic material.

The sealed shell 2 is internally provided with a first assembling groove, a second assembling groove, a third assembling groove, a fourth assembling groove and a fifth assembling groove in sequence, wherein the first assembling groove is positioned at the light inlet of the sealed shell 2, and the fifth assembling groove is positioned at the light outlet of the sealed shell 2; the light-emitting end of the light source assembly 5 and the collimating lens 31 are assembled together in the first assembling groove, the LCD screen 32 is assembled in the second assembling groove, the focusing lens 33 is assembled in the third assembling groove, the reflector 34 is assembled in the fourth assembling groove, and the imaging lens 35 is assembled in the fifth assembling groove.

As shown in fig. 3, the light source assembly 5 includes an LED light source 51 and a light funnel 52, wherein one end of the light funnel 52 is open and hermetically connected to the LED light source 51, and the other end is hermetically connected to the light inlet of the sealed housing 2.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is specific and detailed, but the invention can not be understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by adopting the equivalent substitution or equivalent transformation should fall within the protection scope of the present invention.

Claims

1. A sealed projector is characterized by comprising a shell, a sealed shell arranged in the shell, an imaging light path component arranged in the sealed shell and a light source component arranged between the sealed shell and the shell, wherein the light outlet end of the light source component is hermetically connected with the light inlet of the sealed shell, and the light outlet end of the imaging light path component is hermetically connected with the light outlet of the sealed shell.

2. The sealed projector of claim 1, further comprising a heat dissipation system.

3. The sealed projector according to claim 2, wherein the heat dissipation system comprises a heat absorbing fin, a heat dissipating plate, a heat conducting pipe and a heat dissipating fin connected in sequence, the heat absorbing fin is disposed in the sealed housing, the heat dissipating plate is disposed on the sealed housing, and the heat conducting pipe and the heat dissipating fin are disposed between the sealed housing and the housing.

4. The sealed projector as claimed in claim 2 or 3, wherein the heat dissipation system comprises a heat dissipation fan disposed between the sealed housing and the outer case.

5. The sealed projector of claim 1, wherein the sealed housing includes a base and a top cover sealingly coupled to the base.

6. The sealed projector of claim 5, wherein the base is of unitary construction with the housing.

7. The sealed projector according to claim 1, wherein the imaging optical path assembly comprises a collimating lens, an LCD screen, a focusing lens, a reflector and an imaging lens in sequence along the optical path, and the imaging lens is disposed in and hermetically connected to the light outlet of the sealed housing.

8. The sealed projector according to claim 7, wherein the collimating lens and/or the focusing lens is a fresnel lens.

9. The sealed projector according to claim 7 or 8, wherein the sealed housing has a first fitting groove, a second fitting groove, a third fitting groove, a fourth fitting groove, and a fifth fitting groove in order, the light-emitting end of the light source module and the collimating lens are fitted together in the first fitting groove, the LCD panel is fitted in the second fitting groove, the focusing lens is fitted in the third fitting groove, the mirror is fitted in the fourth fitting groove, and the imaging lens is fitted in the fifth fitting groove.

10. The sealed projector as claimed in claim 1, wherein the light source assembly comprises an LED light source and a light funnel, one end of the light funnel is open and hermetically connected with the LED light source, and the other end of the light funnel is hermetically connected with the light inlet of the sealed housing.