CN1153560A - Folding portable overhead projector - Google Patents

Abstract

A folding overhead projector (10) having a stage body (12) housing a fresnel lens (16) on its top surface. The body is thicker on one side to form a lamp enclosure (14). A hinged mirror is provided within the body and a hinged lamp socket within the lamp enclosure. Two pairs of folding legs (24, 26) are hingedly coupled to the body and lamp enclosure and fold out to lower the mirror and lamp and form a collapsible base. The legs tilt the lamp and mirror so that light is reflected by the mirror up through the fresnel lens. Additional pairs of folding legs provide balance. A collapsible bellows (47), a light baffle (25), and the mirror provide a light and airtight enclosure for the lamp and mirror.

Description

Folding portable overhead projector

The background of invention

Invention field

The present invention relates to set up the formula projector.More particularly, the present invention relates to portable overhead projector, it has hinge portion, and this part can make projector be folded into small and light assembly.

Prior art

The formula projector of setting up belongs to old technology, but continues to have obtained to use widely in education and realm of sale.This projector generally includes light source, one or more lens and reverberator and is used for slide placed on it to carry out the stage body of projection.Traditionally, the slide that is used to set up the formula projector is acetate sheet or similar material clearly, and writes thereon with oil pike.Recently, provide the plastic sheet of letter-size, the electrostatic printer that is used to such as duplicating machine or laser printer is printed.At present, also provide the video LCD plate that is used to set up the formula projector.These LCD plates can link to each other with video source or pocket computer, thereby lantern slide or video frequency program can be projected on the big surface.The LCD plate is used to set up the formula projector has become very extensive in recent years.See for example Presentation Products Magazine (" demiware magazine "), May 1993, p.46.By LCD plate and pocket computer, the demonstrator can carry the multimedia programming box in suitcase.Unique requirement of demonstration is exactly to set up the formula projector.Unfortunately, great majority set up the formula projector all too greatly and/or too heavy, make the demonstrator can not easily it be transported to the demonstration place.

The formula of the setting up projector that three kinds of common types are arranged: transmission, reflection and opaque formula.Stereopticon has light source and suspension arm that is positioned at stage body below, and this arm is used to make slide on the stage body towards projecting lens, and projecting lens then is positioned at above the stage body and is subjected to the reflection of mirror by above-mentioned cantilever.Slide the image thereby be projected on the big surface, this surface is screen or wall normally.The reflecting surface that the reflection type projection instrument has the light source that is positioned at cantilever and is positioned at the stage body below.Light is radiated on the stage body downwards and is reflected and by placing the material on the platform.Opaque projector and episcopic projector are similar, but except the projection slide, can also the projection opaque material and the image of three-dimensional body.In these three kinds of projector, transmission-type is normally maximum and the heaviest.The weight of reflection type projection instrument can be gently to 10 pounds and can fold and put in the suitcase, these projector do not use the LCD plate.

Image for projection produces with the LCD plate needs bright stereopticon, this be because, the LCD plate can absorb as many as 97% from the light of process wherein.Yet projector must remain on lower temperature, so that the LCD plate is not damaged.Now, thus be not suitable for using and sufficiently little and gently can in suitcase, be carried to the formula of the setting up projector in demonstration place by the demonstrator with the LCD plate.

Brief summary of the invention

Thereby, the purpose of this invention is to provide a kind of formula stereopticon that sets up, it is sufficiently bright, thus and the image that can projection LCD plate produces.

Another object of the present invention provides a kind of formula stereopticon that sets up, and it is sufficiently light, thereby can be carried to the demonstration place by the demonstrator.

Another purpose of the present invention provides a kind of formula stereopticon that sets up, and it is sufficiently little, thereby can be put in the suitcase.

According to following with accountable these purposes, folding portable overhead projector of the present invention comprises thin stage body, one Fenier lens is housed in this stage body, and these lens are positioned on the top surface of described stage body or are positioned at the below of a poly-carbon plastic sheet on the described stage body top surface.One side of above-mentioned stage body is darker, thereby has formed the shroud of lamp, this shroud preferably and stage body be integral.The below of the inherent Fenier lens of stage body is provided with a pivotally supported mirror, and, in the lamp shroud, be provided with a pivotally supported lamp socket.Three folding support components are articulated in stage body, and that they are stored under the stage body is local folded-out.The first folding support component is hinged on lamp shroud place, and when these parts by when stage body folds, pivotally supported lamp socket is with the downward-sloping lamp shroud that leaves of certain angle.One second folding support component is articulated in the opposite end of stage body, and leaves stage body and when folding, pivotally supported mirror is with the downward-sloping Fenier lens that leaves of certain angle downwards when these parts.The angle of above-mentioned mirror and the angle of lamp socket are such, and promptly the lamp in the lamp socket causes mirror downwards with light, and mirror upwards reflects light and make it pass through Fenier lens.A flexible Zhe formula case links to each other with second support component, so that for lamp and mirror provide a shroud, this shroud can prevent scattering of light.One the 3rd folding, and support component is relative with second support component is hinged on the stage body place to ground, and medially is hinged on second support component in the mode of similar scissors.The 3rd support component provides balance for stage body when support component stretches out.A folding articulated jib of carrying projecting lens and mirror links to each other with the lamp shroud and can be positioned on the stage body.In one embodiment of the invention, can realize focusing on respect to the height of stage body by regulating projecting lens.In another embodiment, projecting lens has one group of lens element, and the focal plane of these projecting lens can make the rotation of focusing ring and regulated, and said focusing ring then can make lens element move.

According to most preferred embodiment of the present invention, first support component is that a carriage one its edge has formed a pair of support arm, and this is to having slit on the support arm, and second support component is a carriage, its edge has formed a pair of support arm, and this links to each other with slit on first pair of support arm to support arm.The hinged of the 3rd support component is to be undertaken by the slit in the stage body.This support arm structure makes all support components to resemble and folds under stage body the folding camera.The preferably a pair of support arm of the second balanced support parts, they link to each other with stage body by the twisting resistance spring assembly, thereby all support arms are all setovered in the open and close position.The 4th pair of support arm can be hinged with first pair of support arm, so that provide extra balanced support for projector.

Best aspect of the present invention comprises: a high efficiency cooling fan is provided between the support arm of first pair of support arm; Stage body one side is provided with electrical socket; And, being provided with safety switch, these switches are started by temperature and folding arm, thereby cut off power supply to lamp when above when support arm is folded into stage body and when the temperature in the lamp shroud rises to safe temperature.Two lamp sockets and lamp are provided with also abreast can slide between first pair of support arm, and lamp socket preferably links to each other with a selector switch by lead.By this structure, can be by switching selection switch and during lamp socket being slided deal with demonstration lamp fault and selected lamp is moved into operating position.

By with reference in conjunction with the accompanying drawings detailed description, for a person skilled in the art, other purpose and advantage of the present invention will become apparent.

To brief description of drawings

But Fig. 1 is the most preferred embodiment of folding portable projection instrument of the present invention is in the skeleton view under the folding travel position;

Fig. 2 is the transparent sectional side view of projector of the present invention under foldable arm expansion situation;

Fig. 2 a is the skeleton view of the most preferred embodiment of the first folding support component;

Fig. 2 b is the sectional side view of the support component of Fig. 2 a;

Fig. 2 c is the skeleton view of the most preferred embodiment of second support component;

Fig. 2 d is the sectional side view of the support component of Fig. 2 c;

Fig. 2 e and 2f are the amplification transparent prints of the torque spring coupling arrangement of foldable arm, and wherein support arm is in closure and open position respectively;

But being folding portable projection instrument of the present invention, Fig. 3 is in the transparent top view that folds under the travel position;

Fig. 4 is a local transparent side cut-open view of the present invention, and it has shown the top of the projection arm of position that is in folding position, part rise and the position of rising fully;

Fig. 4 a is a top view of the present invention, and it has shown the top that is in the folding position and is in the projection arm of the position of rising fully;

Fig. 4 b is a sectional side view of the present invention, and it has shown the upper and lower that is in the projection arm of the position of rising fully when mirror and lens turn to operating position;

Fig. 4 c is the partial exploded view of the Pivot joint between upper arm part and lower arm part are divided;

Fig. 4 d is the part sectioned view of the Pivot joint that assembles;

Fig. 4 e is the partial cross-sectional side-elevation view of Display projector arm button release position;

Fig. 4 f is the part sectioned view along 4f-4f line among Fig. 4 e;

Fig. 4 g is the part sectioned view of 4g-4g line in Fig. 4 f;

Fig. 5 is that folding portable projector of the present invention is in the skeleton view under the mode of operation, and projection arm wherein is another embodiment; And

Fig. 6 is the skeleton diagram of an embodiment of electrical connection in the projector.

Detailed description to most preferred embodiment

Below referring to Fig. 1 to 3, the formula projector 10 that sets up of the present invention comprises stage body 12 and lamp shroud 14.Stage body and lamp shroud preferably one and have about 12 inches overall dimensions of taking advantage of seven inches.Preferably about 1.1 inches high of stage body, about 2.9 inches high of the shell of lamp.The below of the poly-carbon plastic sheet 15 of the band coating on the top surface of stage body 12 is medially located and be installed in to Fenier lens 16, and have about eight inches aperture areas of taking advantage of ten inches.Lamp shroud 14 has the lamp access door 18 and the hinged folded projection arm 20 of top band blow vent.On a side of stage body 12, preferably be provided with auxiliary socket 22, so that provide the electric power that does not switch for LCD plate and/or computing machine or video source (not shown).Though the size that provides is not crucial, stage body and Fenier lens aperture preferably have suitable size holding the LCD projection plate, and projector should be sufficiently little install to suitcase or similarly carries in the case (not shown) being suitable for.

Shown in Fig. 2 and 3, the mode with pivot is connected in lamp shroud 14 by axle 28 for a pair of folding lamp support arm that has constituted first support component 24,26.The a pair of lamp socket 30,31 that has corresponding lamp 32,33 that supporting links to each other with lamp support arm 24,26, thereby lamp support arm 24,26 can make be pivotable within the lamp shroud 14 substantially as shown in Figure 2 position of lamp 32,33 with respect to the pivotal motion of lamp shroud 14, and said lamp 32,33 then has to become whole reverberator 32a and 33a.A shadow shield 25 is housed, to form a wall of an anti-light scattering cover between support arm 24,26.Thereby a pair of mirror support arm 34,36 is connected in stage body 12 by axle 38 in the mode of pivot and forms second support component, is provided with mirror 40 between support arm 34,36.Mirror support arm and mirror have formed second wall of anti-light scattering cover, and this shroud is made of a folding Zhe formula case 47, and this case links to each other with stage body 12 with the mirror support arm.Described Zhe formula case preferably is made of a diabolo, the opaque and airtight folded flexure strip of folding, as shown in Figure 5.Have slit 42,44 near the end of lamp support arm 24,26, and the end of mirror support arm 34,36 has the pin 46,48 that is meshed with slit 42,44.This engagement of mirror support arm and lamp support arm can make mirror and lamp support arm be folded into the non-folding position of Fig. 2 simultaneously from the make-position of Fig. 1 and 3.According to above-mentioned most preferred embodiment of the present invention, between lamp support arm 24,26, flat fan 50 is housed, its forced air upwards flows to stage body 12.The air that fan 50 provides can pass through because of the blow vent on bulb 32 (perhaps 33) caused convection current of heating and the access door 18 downside of Fenier lens 16 and lamp 32 (33) around and by the outflow of the blow vent in the access door 18.Therefore, this athletic meeting of air makes Fenier lens 16 and lamp 32 all obtain cooling.

As mentioned above, lamp shroud 14 is preferably with some switches, comprises interlock switch 92 and a temperature detect switch 94, and they will obtain more detailed description below.

According to above stated specification, should note, when open position that lamp support arm 24,26 and mirror support arm 34,36 all extend to as shown in Figure 2, lamp 32,33 and mirror 40 all are in such position promptly: reflex to along the path that is shown substantially by arrow 54 along path directive mirror 40 that 52 of arrows demonstrate substantially and by mirror and by Fenier lens 16 from the light of lamp 32 (perhaps 33).Be further noted that, when support arm is in above-mentioned position, shadow shield 25, mirror 40 and Zhe formula case 47 have formed the anti-light scattering shroud between lamp 32,33, mirror 40 and the Fenier lens 16, thereby guaranteed transmission, and can not make the zone of undesirable light around entering into from the light transmission Fenier lens 16 of lamp 32 (perhaps 33).

According to this most preferred embodiment, the 3rd pair of balance support arm 56,58 be by pin 60,61, is articulated in mirror support arm 34,36 in the mode of similar scissors, thereby formed the balanced support parts.As following will the detailed description in detail, the upper end of described balance support arm also is articulated in stage body 12 by the pin in the slit 66,68 62,64.For more stable projector balance is provided, by pin 74,76 the 4th pair of folding arm 70,72 and lamp support arm 24,26 are hinged, as shown in Figure 2, to form the second balanced support parts.Support arm 70,72 can be folded to substantially the position perpendicular with lamp support arm 24,26 from the position that parallels with lamp support arm 24,26 substantially, and preferably remain on the vertical position of this cardinal principle by the spring that props up the little surperficial flange 71,73 on the support arm 24,26, and flange 71,73 plays a part retainer.When support arm 70,72 moved on to folding, make-position, they remained on this closure, folding position by the cam 75,77 that is meshed with mirror support arm 34,36.

Above-mentioned each support arm preferably also has non-slip feet 80,82,84,86,88,90, and they can be fritter rubber or the materials similar that is bonded on the curved end of support arm.

Below referring to Fig. 2 a to 2d, according to this most preferred embodiment, first and second support components are respectively that the mode with single plate forms.Shown in Fig. 2 a and 2b, first support component is the plate 225 with upstanding portion 224,226, and upstanding portion 225,226 then has slit 42,44 and hole 227,229,274 and 276.Hole 227,229 is used for being meshed with above-mentioned axle 28.Hole the 274, the 276th is used for being meshed with above-mentioned pin 74,76.Slit 42,44 is identical with above-mentioned slit basically.In this embodiment, lamp socket 30,31 is installed in one slidably on the bearing 230, and this bearing has a bottom adjutage 239, and this adjutage is used for making bearing to slide along the direction shown in Fig. 2 a and the 2b arrow.Sliding support 230 can be positioned at of selecting in the lamp 32,33 on the operating position.

As shown in Fig. 2 c and 2d, this most preferred embodiment of second support component is the plate 235 with vertical edge 234,236, and edge 234,236 then has hole 237,239,260,261,246 and 248.Hole 237,239 is used for being meshed with axle 38.Hole 246,248 is used for bearing pins 46,48, and hole 260,261 is used for being meshed or bearing pins 60,61 with pin 60,61.

Below referring to Fig. 2 e and 2f, wherein at length shown the annexation of the slit 66,68 in balance support arm 56,58 and the stage body.Each balance support arm 56,58 all has pin 62,64, sell 62,64 then be meshed with corresponding slit 66,68 and the position that can in this slit, show substantially from Fig. 2 e institute slide into Fig. 2 f the position of demonstration substantially.Should be noted that when pin 62,64 is positioned at an end of slit 66,68 balance support arm 56,58 parallels with these slits basically and is in " make-position ".When pin 62,64 is positioned at the other end of slit 66,68, balance support arm 56,58 with respect to slit be tilt and be in " open position ".According to of the present invention most preferred embodiment, each support arm 56,58 all has ears 96,97, and ears 96,97 then has pivot hole 98,99, and pivot hole 98,99 is meshed with an arm 106,107 modes with pivot of torque spring 104,105.Another arm 108,109 of torque spring 104,105 and near the pivot hole 100,101 that medially is in the slit 66,68 are made pivotal engagement.The arm of torque spring departs from each other mutually, thus ears 96,97 pivot axis holes 100,101.Thereby, should note, when make-position that each support arm 56,58 is in shown in Fig. 2 a, corresponding torque spring 104,105 can make corresponding ears 96,97 depart from corresponding pivot hole 100,101 and be partial to an end of slit 66,68, thereby corresponding support arm 56,58 is remained on make-position.Because balance support arm 56,58 links to each other with other support arm, thereby whole folding arm assembly can be partial to make-position as mentioned above like that.When support arm assembly is launched into open position, ears 96,97 shift to pivot hole 100,101 and bias arm 106,107 and 108,109 they separately hole 98,99 and hole 100,101 in be pivoted, thereby spring 104,105 can be in the position shown in Fig. 2 b.In open position, corresponding torque spring 104,105 makes corresponding ears 96,97 depart from corresponding pivot hole 100,101 and is partial to the other end of corresponding slit 66,68, thereby makes corresponding support arm 56,58 maintenances and be biased in open position.

First embodiment that has shown hinged folded projection arm 20 among Fig. 3,4,4a and the 4b.This projection arm comprises upper arm part 122 and the underarm part 124 that is connected with each other by pivot 126, and pivot 126 will give more detailed explanation with reference to Fig. 4 c and 4d below.Upper arm part 122 is being carried the lens and the mirror assembly 130 that will be described in detail below.Underarm part 124 is done pivotally connected by locking pivot 132 with lamp shroud 14.Fig. 4 has shown the projection arm 20 that is in folded state A and is in two stages of deployment B and C.Under the folded state A that Fig. 3 also illustrates, upper arm and underarm part 122,124 are in the frame 114 of lamp shroud 14 side by side, and lens and mirror assembly 130 are in the side casket 115 in the lamp shroud 14.Frame 114 has groove 116 near being preferably in side casket 115, thereby can lift upper arm part 122 under the upper arm part 122 by pointing to be inserted into via groove 116.Praised time-out when upper arm part 122 at quilt and can upwards be pivoted to position B and C shown in Figure 4 with respect to underarm part 124 and lamp shroud 14.When upper arm part 122 was lifted to position C promptly with 124 one-tenth about 75 angles of spending of underarm part, pivot 126 will lock and fix upper arm part 122.Those skilled in the art will be noted that pivot 126 preferably also is fixed on upper and lower arm on the A of position, therefore can by mistake not launch these arms when the transportation projector.Explain the locking action of pivot 126 hereinafter with reference to Fig. 4 c and 4d.

Below referring to Fig. 4 a, can see that the axle of pivot 126 tilts 127 with respect to arm the 122, the 124th, thereby when lifting, can have a certain degree when upper arm part 122 with respect to perpendicular line and towards stage body 12 shapes to position C.When upper arm part 122 locked with respect to underarm 124, underarm part 124 was lifted to the angles with respect to 114 one-tenth about 75 degree of frame, shown in the position D among Fig. 4 b from frame 114.When arm 122,124 was in above-mentioned position, underarm 124 was locked on the appropriate location with respect to lamp shroud 14 by the button 134 of lamp shroud 14 1 sides under the frame 114.Hereinafter with reference to showing in conjunction with Fig. 4 e to 4g and description button 134 and operation thereof.

When arm 122,124 was in position D shown in Fig. 4 b, lens and mirror assembly were centrally located on stage body 12 tops.After this, lens and mirror assembly 130 are opened to position F from the position E shown in Fig. 4 b.Shown in Fig. 4 b, but lens and mirror assembly 130 comprise lens frame 136 and the refrative mirror 140 that is carrying condenser lens 138.Lens frame 136 is hinged by pivot 137 and upper arm 122, and pivot 137 has retainer lens frame is fixed on position E or F.Mirror 140 is articulated in a rotating ring 142 by hinge 144, can regulate the angle of mirrors 140 with respect to lens frame 136, and mirror 140 can also rotate around the axle of lens 138.Those skilled in the art should be noted that mirror 140 tilts and can rotate, thus can point to will with image projection on it projection screen or big and smooth surface.Make the image focusing of projector institute projection by the focusing ring 139 on the rotation lens 138.Those skilled in the art should be noted that focusing ring 139 moves the interior lens element (not shown) in the lens 138, to change the focal plane of lens.

Below referring to Fig. 4 c and 4d, the Pivot joint 126 between upper arm 122 and the underarm 124 is shown as the cam and the slot configurations of spring biasing.In the embodiment shown in Fig. 4 c and the 4d, the upper end of underarm 124 has cam canister 324, and it has axis 127, and this axis favours the axis of arm 124 as described above.One end of tube 324 has axial cammed surfaces 326, and a through hole 328 passes tube 324.The lower end of upper arm 122 has fluting tube 330, and when these arms were in aforesaid folding position, tube 330 had the axis 127 identical with upper arm 122.One end of tube 330 has a pair of along diametric slit 332,334, and they are used for the cammed surfaces 326 of receiving basin 324, shown in Fig. 4 d.Should be noted that the angle between the slit 332,334 approximates the angle of upper arm greatly when upper arm is in as shown in Figure 4 position C.Tube 330 also is threaded through hole 336.In through hole 328 by screw rod 340 being injected a compression spring 338 and cam post 324 and the tapped through hole 336 that screw rod 340 is screwed into fluting tube 330 and Pivot joint 126 can be assembled, shown in Fig. 4 d.Those skilled in the art should be noted that in this structure spring 338 advances cammed surfaces 326 biasings in the slit 332,334, thereby these arms " locking " are being lifted or folding position.Should also be noted that slit and cam all have the edge of inclination, so butt junction applies distortion power and cam can be raised to outside the slit, thereby these arms can be lifted or folding.

Below referring to Fig. 4 e to 4g, underarm 124 can be locked into by the action of button 134 and lift the position or discharge from this position.Button 134 is carried on the ears 424, and then relative underarm 124 extends and be perpendicular with pivotal axis 132 substantially ears 424 at pivotal axis 132 places of underarm 124.Spring 426 vertically setovers button 134 to come out from ears 424.When underarm 124 be in shown in Fig. 4 e lift the position time, spring 426 advances button 134 biasing in the hole 434 of wall 414 of lamp shroud 14, and stops underarm 124 to be moved further around axis 132.Those skilled in the art should be noted that pressing button 134 can discharge underarm 124, to fold in the deposit position.

Fig. 5 has shown the skeleton view of the projector 10 that is in mode of operation.The mode to be independent of projection arm that should be noted that folding arm is operated, and, after projector 10 is erected into mode of operation, can start lamp and cooling fan by switch 150.Fig. 6 has shown a kind of synoptic diagram of possible corded arrangement.According to the corded arrangement of Fig. 6, in a single day alternating-current voltage source 154 links to each other with projector, just provide this voltage constantly to auxiliary socket 22 like that as mentioned above.Folding arm interlock switch 92 only when above-mentioned support arm extends to fully open position shown in Fig. 2 and 5 just to cooling fan 50 and lamp 32,33 power supplies.Temperature detect switch 94 is normally closed, and just disconnects the electric power to lamp 32,33 when only the temperature in lamp shroud 14 rises to dangerous level.It should be noted that switch 94 does not disconnect the electric power to cooling fan 50.A lamp selector switch 152 links to each other with two lamp sockets 30,31, thereby can select lamp 32 or lamp 33 to throw light on.Should be noted that when this dual-lamp structure can lamp in use breaks down is proceeded demonstration by change-over switch 152.Main electric power is connected switch 150 to cooling fan 50 and lamp 32,33 power supplies, but does not influence socket 22.Should be noted that socket 22 is provided with for LCD plate, pocket computer or video source, and, the common electric power that preferably can under the situation of the electric power that does not disconnect above-mentioned these devices, be disconnected to projector.

Fig. 5 has also shown another embodiment of projection arm 520.In this embodiment, lens and mirror assembly 530 are supporting a universal focus lens, and upper arm 522 is by being linked to each other with underarm 524 with the Ratch type focalizer by the tooth bar that button 526 is controlled.By reversing button 526, can make upper arm 522 with respect to underarm 524 vertical moving, and lens and mirror assembly 530 thereby with respect to stage body 12 and vertical moving.Perhaps, do not adopt tooth bar and ratch structure, but can use draw-tube with fixing button 526.

This paper had illustrated and had shown several embodiment of folding portable overhead projector already.Although specific embodiment of the present invention has been described, the present invention is not limited to these embodiment, and this is because the present invention and should understand this instructions like this in the scope that present technique allowed.Therefore, though lamp shroud and stage body are distinguished, under the situation that does not break away from spirit of the present invention these elements can be one or separate.In addition, though provided concrete size, it should be noted that the size that also can adopt other in the mode of example.And, though stage body is illustrated as on its top surface has Fenier lens, but should note, as long as the light path that also passes through the top surface of stage body from the mirror scioptics is arranged, just can adopt equivalent and this lens of Fenier lens can be positioned under the said top surface, it shall yet further be noted that under the situation that does not influence basic function of the present invention, the number of lamp, ventilation unit, switch, socket, axle or the like and particular location also can with here shown in different.For example, the lamp access door also can have a safety switch, and this switch cuts out this lamp when door is turned on.In addition, link to each other though lamp and mirror be illustrated as with they support arms separately, it should be noted that, they can be mounted in hinged mode away from these support arms but can match with these support arms so that have suitable position under folding and erectility.It shall yet further be noted that at some light fixture has under the situation of independent reflectors, may not need fully lamp is pivoted, but lamp reflector is pivoted, thereby make light directive mirror when support arm is opened from this lamp.In addition, have the torque spring device though support arm is illustrated as, this device is used for support arm is biased in the open and close position, it should be noted that dissimilar bias components also can realize and the same or analogous function of the said function of this paper.Thereby those skilled in the art should be noted that not breaking away under the preceding topic of the described spirit and scope of the invention of appended claims, other improvement can be provided the present invention who is provided.

Claims (25)

1. folding portable overhead projector, this projector comprises:

A) stage body, it has a top surface, and this top surface has a light transmission part;

B) lamp shroud, a side of described lamp shroud and described stage body forms adjacently;

C) one first support component, it links to each other with one of described stage body with hinged mode and described lamp shroud and can move to a second place from a primary importance, at above-mentioned primary importance place, described first support component parallels with described top surface basically, and at this second place place, one in then described relatively lamp shroud of described first support component and the described stage body is extended downwards;

D) be installed in a lamp and a lamp reflector in the described lamp shroud, described lamp reflector can be pivoted with respect to described stage body, thereby, when described first support component is in described primary importance, described lamp is comprised in the described lamp shroud basically, and when described first support component was in the described second place, the described relatively lamp shroud of described lamp reflector was towards the below;

E) one second support component, it and described stage body are hinged and can move to a second place from a primary importance, at described primary importance place, described second support component parallels with described top surface basically, and at described second place place, described second support component then extends downwards from described stage body relatively;

F) mirror, it is installed between described second support component and the described stage body and can be pivoted with respect to described stage body, thereby, when described second support component is in described primary importance, described mirror parallels with described stage body basically, and when described second support component is in the described second place, described mirror has a certain degree with described stage body downwards, when described second support component and described first support component all are in the described second place, described mirror and described lamp reflector are positioned at suitable position, thereby described mirror will reflect the light transmission part of described top surface from the light of described lamp;

G) collapsible projection arm, it has first end that links to each other with one of described lamp shroud with described stage body and has one second end that can be positioned on described stage body top; And

H) be installed in reflection unit on second end of described collapsible projection arm, it is used to reflect the light by the light transmission part of described top surface.

2. according to the formula of the setting up projector of claim 1, it is characterized in that:

Described stage body and described lamp shroud are that lamp shroud rectangle and described is than described stage body height basically.

3. according to the formula of the setting up projector of claim 1, it is characterized in that:

Described first support component comprises first pair of support arm, and described lamp then is installed between the support arm of described first pair of support arm; And

Described second support component comprises second pair of support arm, and described mirror then is installed between the support arm of described second pair of support arm.

4. according to the formula of the setting up projector of claim 1, it is characterized in that:

Described lamp reflector links to each other with described first support component and described mirror links to each other with described second support component.

5. according to the formula of the setting up projector of claim 1, it is characterized in that it also comprises:

I) be arranged on first lens devices in the described stage body, it is used to make the light by the light transmission part of described top surface to focus on; And

J) second lens devices that links to each other with described reflection unit, it is used to make the light of described reflection unit reflection to focus on.

6. according to the formula of the setting up projector of claim 3, it is characterized in that it also comprises:

I) first shade that links to each other with described first pair of support arm, it is used for being blocked in basically the light that passes through between described first pair of support arm; And

J) second shade that links to each other with one of described second pair of support arm with described stage body and described first pair of support arm, it be used for described first shade form described first pair of support arm, described second pair of support arm, described lamp shroud, and described stage body between a shroud.

7. according to the formula of the setting up projector of claim 3, it is characterized in that it also comprises:

I) be positioned at least one ventilation slit on the described lamp shroud; And

J) cooling fan, it is installed between described first pair of support arm, and guides air into described stage body.

8. according to the formula of the setting up projector of claim 1, it is characterized in that it also comprises:

I) the balanced support parts that are hinged with described stage body, it moves on to a second place from a primary importance, and at this primary importance place, described balanced support parts parallel with described top surface basically, and at this second place place, the then described relatively stage body of described balance support arm extends downwards.

9. the formula of setting up projector according to Claim 8 is characterized in that:

Described first support component, second support component and balance support component are connected with each other, thereby all described support components can both be shifted to the described second place from described primary importance simultaneously.

10. according to the formula of the setting up projector of claim 9, it is characterized in that it also comprises:

J) the support component bias unit that links to each other with one of described support component, it is used for described support component is biased in the above-mentioned primary importance and the second place.

11. the formula of the setting up projector according to claim 10 is characterized in that:

Described support component bias unit comprises the torque spring that links to each other with described stage body with described balanced support parts.

12. the formula of the setting up projector according to claim 11 is characterized in that it also comprises:

K) the second balanced support parts that are hinged with described first support component, it can move to the second place that tilts with respect to described first support component from paralleling primary importance substantially with described first support component.

13. the formula of the setting up projector according to claim 1 is characterized in that:

Described lamp shroud and described stage body are one each other.

14. the formula of the setting up projector according to claim 1 is characterized in that:

Described lamp links to each other with described first support component.

15. the formula of the setting up projector according to claim 1 is characterized in that:

Described mirror links to each other with described second support component.

16. the formula of the setting up projector according to claim 1 is characterized in that:

First end of described collapsible projection arm and described lamp shroud are hinged, and described lamp shroud comprises a top groove that is used to receive described collapsible projection arm and described reflection unit.

17. the formula of the setting up projector according to claim 17 is characterized in that:

Have articulated joint between first end of described projection arm and second end, described articulated joint defines a upper arm part and a underarm part, when described collapsible projection arm was received in the described top groove, described upper arm part and described underarm part were parallel to each other basically.

18. the formula of the setting up projector according to claim 17 is characterized in that:

Described reflection unit comprises hinged mirror.

19. the formula of the setting up projector according to claim 5 is characterized in that:

Described first lens devices comprises a Fenier lens, and described second lens devices then comprises the lens with adjustable focal plane.

20. the formula of the setting up projector according to claim 6 is characterized in that:

Described second shade comprises a Zhe formula case.

21. the formula of the setting up projector according to claim 7 is characterized in that it also comprises:

K) first switchgear that links to each other with described lamp with described fan, it is used for turning on and off described lamp and described fan in manual mode;

L) the interlock switch device that links to each other with described lamp with described fan, it is used for automatically turn-offing described lamp and described fan when described first pair of support arm is in described primary importance; And

M) temperature detect switch device, it links to each other with described lamp, and is used for automatically shutting down when described temperature detect switch device detects chosen temperature described lamp.

22. the formula of the setting up projector according to claim 21 is characterized in that it also comprises:

N) be installed in one second lamp between described first pair of support arm; And

O) the second switch device that links to each other with described second lamp with described lamp, it is used for selected described lamp that will illuminate and of described second lamp.

23. the formula of setting up projector according to Claim 8 is characterized in that:

Described balanced support parts are hinged with the mode and described second support component of similar scissors;

Described second support component is by one first pin and slit web member and being hinged with described first support component; And

Described balanced support parts are by one second pin and slit web member and being hinged with described stage body.

24. a folding portable overhead projector is characterized in that it comprises:

A) stage body, it has a top surface, and this top surface has a light transmission part;

B) lamp shroud, a side of described lamp shroud and described stage body is adjacent;

C) one first support component, it links to each other with one of described stage body with hinged mode and described lamp shroud and can move to a second place from a primary importance, at this primary importance place, described first support component parallels with described top surface basically, and at this second place place, described first support component then extends downwards with respect to one in described lamp shroud and the described stage body;

D) be installed in the described lamp shroud and described relatively lamp shroud lamp down;

E) one second support component, it and described stage body are hinged and can move to a second place from a primary importance, at described primary importance place, described second support component parallels with described top surface basically, and at described second place place, described second support component then extends downwards from described stage body relatively and is located substantially on outside the described stage body;

F) be installed in mirror between described second support component and the stage body, it can be pivoted with respect to described stage body, thereby, described mirror parallels with described stage body when described second support component is in described primary importance basically, and when described second support component is in the described second place, the then described relatively stage body of described mirror has a certain degree downwards and is in basically outside the described stage body, when described second support component is in the described second place, described mirror is positioned at suitable position, thereby described mirror will reflect the light transmission part of described top surface from the light of described lamp;

G) folding projection arm, it has first end that links to each other with one of described lamp shroud with described stage body and has second end that can be positioned on described stage body top; And

H) be installed in reflection unit on second end of described collapsible projection arm, it is used to reflect the light by the light transmission part of described top surface.

25. folding, portable overhead projector is characterized in that it comprises:

A) stage body, it has a top surface, and this top surface has a transmittance part;

B) lamp shroud, a side of described lamp shroud and described stage body is adjacent;

C) one first support component, it links to each other with one of described stage body with hinged mode and described lamp shroud and can move to a second place from a primary importance, at this primary importance place, described first support component parallels with described top surface basically, and at this second place place, one in then described relatively lamp shroud of described first support component and the described stage body is extended downwards;

D) be installed in lamp in the described lamp shroud, it can be pivoted with respect to described stage body, thus described lantern festival when described first support component is in the described second place described relatively lamp shroud towards below;

E) one second support component that is hinged with described stage body, it can move on to a second place from a primary importance, and at this primary importance place, described second support component parallels with described top surface basically, and at this second place place, the then described relatively stage body of second support component extends downwards;

F) be installed in mirror between described second support component and the described stage body, when described first support component is in the described second place, described lamp is in suitable position with respect to described mirror, thereby described mirror will reflect the light transmission part of described top surface from the light of described lamp;

G) folding projection arm, it has first end that links to each other with one of described lamp shroud with described stage body and has second end that can be positioned on described stage body top; And

H) be installed in reflection unit on second end of described collapsible projection arm, it is used to reflect the light by the light transmission part of described top surface.

Images