CN112856140A

CN112856140A - Projection equipment for multimedia conference

Info

Publication number: CN112856140A
Application number: CN202110207765.2A
Authority: CN
Inventors: 不公告发明人
Original assignee: Chaochangming
Current assignee: Chaochangming
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2021-05-28

Abstract

The invention discloses projection equipment for a multimedia conference, which comprises a box body and a damping mechanism, wherein the damping mechanism is arranged at the lower end of the box body, the lower end of the box body and the damping mechanism are both in threaded connection with the same bolt, and the lower end of the box body is fixedly connected with a trundle through the damping mechanism. Utilize the first electric putter in the backup pad to promote the base plate rebound, make the base plate upper end establish and stretch out and draw back from top to bottom between the short slab that has the spout and the riser that has the slider, utilize the lift effect, can make things convenient for the use of projection equipment body to protect around, cooperate damper's setting, when the box produces and rocks, the effect of shock attenuation protection can be played through locating plate and the first spring that sets up between the seat of joining in marriage, utilize the tongue that cun pole is connected to carry out sliding friction in the connecting cylinder simultaneously, can weaken and consume the cushion effect of first spring, thereby can make the inside stability of box avoid damaging more.

Description

Projection equipment for multimedia conference

Technical Field

The invention relates to the field of projection equipment, in particular to projection equipment for a multimedia conference.

Background

With the rapid development of the information age, the importance of display systems for realizing large screens has been emphasized. As an example of a device implementing such a large screen, there has been an image projection device having a function of enlarging and projecting an image. The image projection apparatus refers to an apparatus for implementing an image using light emitted from a light source and projecting the implemented image, and representative examples include a projector, a projection television, and the like.

However, in traditional portable projection equipment use, receive external environment's influence easily, lead to equipment to produce and rock the damage to there is the case that causes the damage to projection equipment because the student is played with joyfully, in addition, traditional projection equipment uses before the back because long-term exposure piles up dust and impurity outside easily, clears up more troublesome.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide projection equipment for a multimedia conference, according to the scheme, a lifting mechanism is arranged on the inner side of a box body, a first electric push rod on a supporting plate is used for pushing a base plate to move upwards, so that the upper end of the base plate is arranged between a short plate with a sliding groove and a vertical plate with a sliding block to stretch up and down, the upper end of the base plate can be conveniently protected before and after the projection equipment body is used by utilizing the lifting effect, the damping mechanism is arranged in a matched mode, when the box body shakes, the damping protection effect can be achieved through a first spring arranged between the positioning plate and a matching seat, meanwhile, sliding friction is performed in a connecting cylinder through a rubber tongue connected with a size rod, the buffering force of the first spring can be weakened and consumed, and the interior of the box body can be more stably prevented from being damaged.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides a projection equipment for multimedia conference, includes box and damper, damper establishes the lower extreme at the box, the same bolt of the equal threaded connection of lower extreme and damper of box, damper fixedly connected with truckle is passed through to the lower extreme of box, the inboard fixedly connected with elevating system of box, elevating system's upper end fixedly connected with base plate, elevating system's offside is rotated and is connected with the installation shell, the inboard of installation shell is equipped with the solid mechanism of card, the inboard of installation shell has been connected with the projection equipment body through the solid mechanism joint of card, the upper end fixedly connected with adjustment mechanism of base plate, the upper end of base plate is swing joint through adjustment mechanism and installation shell, the back of installation shell is equipped with heat dissipation mechanism, the upper end of box is equipped with dustproof mechanism.

Further, damper includes the locating plate and joins in marriage the seat, the lower extreme of locating plate and box all is threaded connection with the bolt, the same first spring of contralateral fixedly connected with of locating plate and joining in marriage the seat, the lower extreme fixedly connected with truckle of joining in marriage the seat, the little pole of upper end fixedly connected with of joining in marriage the seat, the middle part that the little pole runs through first spring, the upper end fixedly connected with connecting cylinder of locating plate, the inboard at the box is established to the connecting cylinder, the inside wall fixedly connected with of connecting cylinder is run through to the upper end of cun pole glues the tongue, it is sliding connection to glue tongue and connecting cylinder.

Further, elevating system includes the riser, riser fixed connection is in the inboard of box, the same backup pad of lower extreme offside fixedly connected with of riser, the first electric putter of upper end fixedly connected with of backup pad, first electric putter's output and base plate are fixed connection, the outside fixedly connected with short slab of base plate, the outside and the short slab of installation shell are connected for rotating, the inboard of short slab is equipped with the spout, the outside fixedly connected with slider of riser, slider and spout are sliding connection.

Furthermore, the clamping mechanism comprises a through cavity and a supporting rod, the through cavity is arranged on the inner side of the mounting shell, a pressing plate is fixedly connected to the outer side of the supporting rod, the pressing plate and the opposite side of the through cavity are fixedly connected with a second spring, the supporting rod penetrates through the middle of the second spring, a handle is fixedly connected to the inner side wall of the through cavity, the upper end of the supporting rod penetrates through the handle, a position groove is formed in the upper end of the projection device body, and the inner side wall of the through cavity and the position groove are clamped at the lower end of the supporting rod.

Furthermore, adjustment mechanism includes second electric putter, second electric putter fixed connection is in the upper end of base plate, the back fixedly connected with inserted bar of installation shell, the outside of inserted bar is rotated and is connected with the pedestal, pedestal and second electric putter's output are fixed connection.

Further, heat dissipation mechanism includes the water tank, water tank fixed connection is at the back of installation shell, the back fixedly connected with water pump of water tank, the outside fixedly connected with inlet tube of water pump, the one end and the water tank of inlet tube are fixed connection, the other end of inlet tube runs through installation shell fixedly connected with return gallery pipe, the return gallery pipe is established in the inside of installation shell, the other end fixedly connected with outlet pipe of return gallery pipe, the other end and the water tank of outlet pipe are fixed connection, the lower extreme fixedly connected with heat-absorbing body of return gallery pipe, the heat-absorbing body laminates with the projection equipment body mutually.

Further, dustproof mechanism includes articulated elements and apron, the outside of apron is passed through the articulated elements and is connected for articulated with the box, the outside fixedly connected with rubber carrying handle of apron, the upper end limit mouth department of box is equipped with the grooving, the inboard of box is equipped with puts the thing board.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) this scheme sets up elevating system through the inboard that sets up at the box, utilize first electric putter in the backup pad to promote the base plate rebound, it is flexible from top to bottom to make the base plate upper end establish between the short slab that has the spout and the riser that has the slider, utilize the lift effect, can make things convenient for the use front and back of projection equipment body to protect, the setting of damper is being cooperated, when the box produces and rocks, the effect of shock attenuation protection can be played through locating plate and the first spring that sets up between joining in marriage the seat, utilize the gluey tongue that cun pole is connected to carry out sliding friction in the connecting cylinder simultaneously, can weaken and consume the cushion effect of first spring, thereby can make the inside more stable projection equipment body of avoiding of box damage.

(2) This scheme is through setting up solid mechanism of card, after the projection equipment body inserts the installation shell, because the upper end of projection equipment body is equipped with the position groove, and be equipped with on the inside wall of installation shell and lead to the chamber, the handle of pole upper end is supported in the pulling, make the clamp plate with lead to the second spring that sets up between the chamber and produce elasticity and contract after, after the projection equipment body inserts the installation shell, loosen the handle, utilize the reseing of second spring, the messenger supports the position groove on pole and the projection equipment body and carries out the joint, thereby reach and carry out convenient fixed purpose to the projection equipment body.

(3) This scheme is through setting up adjustment mechanism, because installation shell and short slab are connected for rotating, and the back of installation shell is owing to installed the inserted bar, utilizes the second electric putter of base plate upper end to stretch out and draw back from top to bottom to drive and the activity of inserted bar pivoted pedestal, can conveniently adjust visual angle about the projection equipment body in the installation shell.

(4) This scheme is through setting up heat dissipation mechanism, because the heat that the heat-absorbing body that sets up and the projection equipment body to the laminating at the inboard of installation shell absorbed the projection equipment body, and the upper end of heat-absorbing body owing to with return gallery pipe fixed connection, utilizes the inlet tube to be connected with the return gallery pipe through the water pump, passes through the outlet pipe with the heat that the return gallery pipe absorbed in the water tank of discharging again to can take away the produced heat of projection equipment body.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the back side of the mounting housing of the present invention;

FIG. 3 is a schematic diagram of the internal mechanism of the heat dissipation mechanism of the present invention;

FIG. 4 is an enlarged view of the structure at the position A;

fig. 5 is a plan view of the dust-proof mechanism of the present invention.

The reference numbers in the figures illustrate:

1. a caster wheel; 2. a lifting mechanism; 3. a damping mechanism; 4. a box body; 5. mounting a shell; 6. a projection device body; 7. an adjustment mechanism; 8. a substrate; 9. a heat dissipation mechanism; 10. a clamping mechanism; 11. a dust-proof mechanism; 201. a support plate; 202. a first electric push rod; 203. a vertical plate; 204. a slider; 205. a chute; 206. a short plate; 301. a connecting cylinder; 302. a glue tongue; 303. cun pole; 304. positioning a plate; 305. a first spring; 306. matching a seat; 307. a bolt; 701. inserting a rod; 702. a pedestal; 703. a second electric push rod; 901. a water tank; 902. a water outlet pipe; 903. a water inlet pipe; 904. a water pump; 905. a corridor pipe; 906. a heat absorbing body; 101. a cavity is communicated; 102. a support rod; 103. a second spring; 104. a handle; 105. pressing a plate; 106. a position groove; 111. a storage plate; 112. a cover plate; 113. an articulation member; 114. a rubber handle; 115. and (6) grooving.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-5, a projection apparatus for a multimedia conference includes a box 4 and a damping mechanism 3, the damping mechanism 3 is disposed at a lower end of the box 4, the lower end of the box 4 and the damping mechanism 3 are both screwed to a same bolt 307, the lower end of the box 4 is fixedly connected to a caster 1 through the damping mechanism 3, the inner side of the box 4 is fixedly connected to a lifting mechanism 2, the upper end of the lifting mechanism 2 is fixedly connected to a substrate 8, the opposite side of the lifting mechanism 2 is rotatably connected to a mounting case 5, the inner side of the mounting case 5 is provided with a fastening mechanism 10, the inner side of the mounting case 5 is connected to a projection apparatus body 6 through the fastening mechanism 10, the upper end of the substrate 8 is fixedly connected to an adjusting mechanism 7, the upper end of the substrate 8 is movably connected to the mounting case 5 through the adjusting mechanism 7, and the back of the mounting case 5 is provided with a heat dissipation, the upper end of box 4 is equipped with dustproof mechanism 11, and the lower extreme of installation shell 5 distributes and has a plurality of louvres, can improve the radiating effect to projection equipment body 6.

Referring to fig. 1, the damping mechanism 3 includes a positioning plate 304 and a matching seat 306, the lower ends of the positioning plate 304 and the box body 4 are both in threaded connection with a bolt 307, the opposite sides of the positioning plate 304 and the matching seat 306 are fixedly connected with a first spring 305, the lower end of the matching seat 306 is fixedly connected with a caster 1, the upper end of the matching seat 306 is fixedly connected with a cun rod 303, the cun rod 303 penetrates through the middle of the first spring 305, the upper end of the positioning plate 304 is fixedly connected with a connecting cylinder 301, the connecting cylinder 301 is arranged on the inner side of the box body 4, the upper end of the cun rod 303 penetrates through the inner side wall of the connecting cylinder 301 and is fixedly connected with a rubber tongue 302, and the rubber tongue 302 and the connecting cylinder 301.

Referring to fig. 1, the lifting mechanism 2 includes a vertical plate 203, the vertical plate 203 is fixedly connected to the inner side of the box 4, the lower end opposite side of the vertical plate 203 is fixedly connected with the same supporting plate 201, the upper end of the supporting plate 201 is fixedly connected with a first electric push rod 202, the output end of the first electric push rod 202 is fixedly connected with the base plate 8, the outer side of the base plate 8 is fixedly connected with a short plate 206, the outer side of the mounting shell 5 is rotatably connected with a short plate 206, the inner side of the short plate 206 is provided with a sliding groove 205, the outside fixedly connected with slider 204 of riser 203, slider 204 and spout 205 are sliding connection, utilize first electric putter 202 in the backup pad 201 to promote base plate 8 and upwards remove, make base plate 8 upper end establish and stretch out and draw back from top to bottom between the short slab 206 that has spout 205 and the riser 203 that has slider 204, utilize the lift effect, can make things convenient for the use front and back of projection equipment body 6 to protect.

Referring to fig. 4, the fastening mechanism 10 includes a through cavity 101 and a supporting rod 102, the through cavity 101 is disposed inside the mounting case 5, the outer side of the supporting rod 102 is fixedly connected with a pressing plate 105, the opposite side of the pressing plate 105 and the through cavity 101 is fixedly connected with a same second spring 103, the supporting rod 102 penetrates through the middle of the second spring 103, the upper end of the supporting rod 102 penetrates through the inner side wall of the through cavity 101 and is fixedly connected with a handle 104, the upper end of the projection apparatus body 6 is provided with a position groove 106, the lower end of the supporting rod 102 penetrates through the inner side wall of the through cavity 101 and the position groove 106 and is clamped, when the projection apparatus body 6 is inserted into the mounting case 5, since the upper end of the projection apparatus body 6 is provided with the position groove 106, the inner side wall of the mounting case 5 is provided with the through cavity 101, the handle 104 at the upper end of the supporting rod 102 is pulled, the second spring 103 disposed between the pressing plate 105 and the through cavity 101 is elastically retracted, and, the handle 104 is released, and the second spring 103 is reset, so that the abutting rod 102 is clamped with the position groove 106 on the projection equipment body 6.

Referring to fig. 2, the adjusting mechanism 7 includes a second electric push rod 703, the second electric push rod 703 is fixedly connected to the upper end of the substrate 8, the back of the mounting case 5 is fixedly connected to the inserting rod 701, the outer side of the inserting rod 701 is rotatably connected to the shaft bracket 702, the output ends of the shaft bracket 702 and the second electric push rod 703 are fixedly connected, since the mounting case 5 and the short plate 206 are rotatably connected, and the back of the mounting case 5 is provided with the inserting rod 701, the shaft bracket 702 rotating with the inserting rod 701 is driven to move by the vertical extension and contraction of the second electric push rod 703 at the upper end of the substrate 8, so that the vertical viewing angle of the projection apparatus body 6 in the mounting case 5 can be conveniently adjusted.

Referring to fig. 3, the heat dissipation mechanism 9 includes a water tank 901, the water tank 901 is fixedly connected to the back of the installation housing 5, the back of the water tank 901 is fixedly connected to a water pump 904, the outer side of the water pump 904 is fixedly connected to a water inlet pipe 903, one end of the water inlet pipe 903 is fixedly connected to the water tank 901, the other end of the water inlet pipe 903 penetrates through the installation housing 5 and is fixedly connected to a vestibule pipe 905, the vestibule pipe 905 is arranged inside the installation housing 5, the other end of the vestibule pipe 905 is fixedly connected to a water outlet pipe 902, the other end of the water outlet pipe 902 is fixedly connected to the water tank 901, the lower end of the vestibule pipe 905 is fixedly connected to a heat absorbing body 906, the heat absorbing body 906 is attached to the projection apparatus body 6, the heat absorbing body 906 is mainly made of a silica gel block, which can facilitate heat conduction, the vestibule pipe 905 mainly adopts, the water resistance heat dissipation effect is achieved, the heat dissipation fins are arranged on the outer side of the water tank 901, the purpose of dissipating heat of water in the water tank 901 can be accelerated, the water pump is a small-sized mute water pump produced by the Kogyukang company, and the model of the water pump is KYK27 APW.

Referring to fig. 5, the dust-proof mechanism 11 includes a hinge member 113 and a cover plate 112, the outer side of the cover plate 112 is hinged to the box 4 through the hinge member 113, a rubber handle 114 is fixedly connected to the outer side of the cover plate 112, a cutting groove 115 is formed at an upper end opening of the box 4, an object placing plate 111 is disposed at the inner side of the box 4, the cutting groove 115 is mainly used for facilitating the hinge member 113 to drive the cover plate 112 to turn over and buckle with the object placing plate, the rubber handle 114 can prevent the cover plate 112 from being impacted when the cover plate 112 is turned over, the dust-proof mechanism 11 is disposed above the box 4, the cover plate 112 is turned over to the object placing plate 111 through the rubber handle 114 on the cover plate 112, and thus the effect of dust-proof for the projection device body 6 inside the box 4 is achieved.

The invention relates to a projection device for a multimedia conference, which has the following working principle: when in use, firstly, the cover plate 112 is turned over by the rubber carrying handle 114 on the cover plate 112 above the box body 4, the cover plate 112 is turned over the cutting groove 115 at the left and right sides of the box body 4, the base plate 8 is pushed to move upwards by the first electric push rod 202 on the supporting plate 201, the upper end of the base plate 8 is arranged between the short plate 206 with the sliding groove 205 and the vertical plate 203 with the sliding block 204 to extend and retract up and down, the projection device body 6 can be conveniently protected before and after use by utilizing the lifting effect, the arrangement of the damping mechanism 3 is matched, when the box body 4 shakes, the first spring 305 arranged between the positioning plate 304 and the matching seat 306 can play a damping protection role, and meanwhile, the rubber tongue 302 connected with the inch rod 303 is utilized to carry out sliding friction in the connecting cylinder 301, the damping force of the first spring 305 can be weakened and consumed, the interior of the box body 4 can be more stably prevented from being damaged by the projection, in order to facilitate the installation of the projection device body 6, after the projection device body 6 is inserted into the installation shell 5, since the upper end of the projection device body 6 is provided with the position groove 106, and the inner side wall of the installation shell 5 is provided with the through cavity 101, the handle 104 at the upper end of the abutting rod 102 is pulled to enable the second spring 103 arranged between the pressing plate 105 and the through cavity 101 to generate elastic retraction, after the projection device body 6 is inserted into the installation shell 5, the handle 104 is released, the abutting rod 102 and the position groove 106 on the projection device body 6 are clamped by utilizing the resetting of the second spring 103, so that the aim of conveniently installing and fixing the projection device body 6 is achieved, since the installation shell 5 and the short plate 206 are rotatably connected, and the back of the installation shell 5 is provided with the insertion rod 701, the shaft bracket 702 rotating with the insertion rod 701 is driven to move by utilizing the up-and down stretching of the second electric push rod 703 at the upper end of the base plate 8, so as to conveniently adjust the up-down, and through the heat dissipation mechanism 9 that adds, when projection equipment body 6 produced heat, owing to set up and projection equipment body 6 absorbs the heat that projection equipment body 6 produced to the heat-absorbing body 906 of laminating in the inboard of installation shell 5, and the upper end of heat-absorbing body 906 is owing to with corridor pipe 905 fixed connection, utilize inlet tube 903 and corridor pipe 905 to be connected through water pump 904, pass through outlet pipe 902 with the heat that corridor pipe 905 absorbed and arrange back to water tank 901 again, thereby can take away the produced heat of projection equipment body 6.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a projection equipment for multimedia conference, includes box (4) and damper (3), its characterized in that: the shock absorption mechanism (3) is arranged at the lower end of the box body (4), the lower end of the box body (4) and the shock absorption mechanism (3) are in threaded connection with the same bolt (307), the lower end of the box body (4) is fixedly connected with a caster (1) through the shock absorption mechanism (3), the inner side of the box body (4) is fixedly connected with a lifting mechanism (2), the upper end of the lifting mechanism (2) is fixedly connected with a base plate (8), the opposite side of the lifting mechanism (2) is rotatably connected with a mounting shell (5), the inner side of the mounting shell (5) is provided with a clamping mechanism (10), the inner side of the mounting shell (5) is connected with a projection equipment body (6) through the clamping mechanism (10) in a clamping manner, the upper end of the base plate (8) is fixedly connected with an adjusting mechanism (7), and the upper end of the base plate (8) is movably connected with the mounting, the back of installation shell (5) is equipped with heat dissipation mechanism (9), the upper end of box (4) is equipped with dustproof mechanism (11).

2. The projection device for multimedia conferencing as claimed in claim 1, wherein: damper (3) include locating plate (304) and join in marriage seat (306), the lower extreme of locating plate (304) and box (4) all is threaded connection with bolt (307), the same first spring (305) of contralateral fixedly connected with of locating plate (304) and joining in marriage seat (306), the lower extreme fixedly connected with truckle (1) of joining in marriage seat (306), join in marriage the inboard at box (4) in upper end fixedly connected with cun pole (303) of seat (306), cun pole (303) run through the middle part of first spring (305), the upper end fixedly connected with connecting cylinder (301) of locating plate (304), the inboard at box (4) is established in connecting cylinder (301), the inside wall fixedly connected with rubber tongue (302) of connecting cylinder (301) is run through to the upper end of cun pole (303), rubber tongue (302) and connecting cylinder (301) are sliding connection.

3. The projection device for multimedia conferencing as claimed in claim 1, wherein: elevating system (2) include riser (203), riser (203) fixed connection is in the inboard of box (4), the same backup pad (201) of lower extreme offside fixedly connected with of riser (203), the first electric putter (202) of upper end fixedly connected with of backup pad (201), the output and base plate (8) of first electric putter (202) are fixed connection, the outside fixedly connected with short slab (206) of base plate (8), the outside and short slab (206) of installation shell (5) are for rotating the connection, the inboard of short slab (206) is equipped with spout (205), the outside fixedly connected with slider (204) of riser (203), slider (204) and spout (205) are sliding connection.

4. The projection device for multimedia conferencing as claimed in claim 1, wherein: the clamping mechanism (10) comprises a through cavity (101) and a supporting rod (102), the through cavity (101) is arranged on the inner side of the installation shell (5), a pressing plate (105) is fixedly connected to the outer side of the supporting rod (102), the pressing plate (105) and the opposite side of the through cavity (101) are fixedly connected with a same second spring (103), the supporting rod (102) penetrates through the middle of the second spring (103), a handle (104) is fixedly connected to the inner side wall of the through cavity (101) and penetrates through the upper end of the supporting rod (102), a position groove (106) is arranged at the upper end of the projection equipment body (6), and the inner side wall of the through cavity (101) and the position groove (106) are connected to the lower end of the supporting rod (102) in a clamping mode.

5. The projection device for multimedia conferencing as claimed in claim 1, wherein: adjustment mechanism (7) include second electric putter (703), second electric putter (703) fixed connection is in the upper end of base plate (8), the back fixedly connected with inserted bar (701) of installation shell (5), the outside rotation of inserted bar (701) is connected with pedestal (702), the output of pedestal (702) and second electric putter (703) is fixed connection.

6. The projection device for multimedia conferencing as claimed in claim 1, wherein: heat dissipation mechanism (9) include water tank (901), water tank (901) fixed connection is at the back of installation shell (5), the back fixedly connected with water pump (904) of water tank (901), outside fixedly connected with inlet tube (903) of water pump (904), the one end and water tank (901) of inlet tube (903) are fixed connection, the other end of inlet tube (903) runs through installation shell (5) fixedly connected with vestibule pipe (905), the inside at installation shell (5) is established in vestibule pipe (905), the other end fixedly connected with outlet pipe (902) of vestibule pipe (905), the other end and water tank (901) of outlet pipe (902) are fixed connection, the lower extreme fixedly connected with heat-absorbing body (906) of vestibule pipe (905), heat-absorbing body (906) and projection equipment body (6) laminate mutually.

7. The projection device for multimedia conferencing as claimed in claim 1, wherein: dustproof mechanism (11) are including articulated elements (113) and apron (112), the outside of apron (112) is passed through articulated elements (113) and box (4) and is articulated the connection, the outside fixedly connected with rubber carrying handle (114) of apron (112), the last edge mouth department of box (4) is equipped with grooving (115), the inboard of box (4) is equipped with puts thing board (111).