阅读说明：本技术 一种具有线性菲涅尔透镜层的正投影屏幕 (Orthographic projection screen with linear Fresnel lens layer ) 是由 李正俊 卢甲刚 于 2021-08-21 设计创作，主要内容包括：本发明涉及投影屏幕领域,且公开了一种具有线性菲涅尔透镜层的正投影屏幕,万向移动轮顶部固定连接有移动箱,移动箱内开设有升降腔,移动箱顶部固定连接有清理箱,升降腔底部中间设置有升降机构,清理箱内顶部前端设置有清理机构,升降机构包括有第一电机、第一皮带轮、第一皮带、第二皮带轮、转动杆和滚珠螺母副。该具有线性菲涅尔透镜层的正投影屏幕,通过设置反射板材质为铝片,可以具有高的可见光反射率,用于反射投影仪的入射光,通过设置换色板背光面颜色为暖色调,可以对进入的光线颜色进行过滤,防止射出的光线对观看者眼睛造成损伤,通过设置扩光槽,且扩光槽形状为弧形,可以将光线进行散射,使光线均匀。(The invention relates to the field of projection screens and discloses an orthographic projection screen with a linear Fresnel lens layer. This orthographic projection screen with linear fresnel lens layer is the aluminum sheet through setting up the reflecting plate material, can have high visible light reflectivity for the incident light of reflection projecting apparatus, trades the color board shady face colour through the setting and is the warm tone, can filter the light colour that gets into, prevents that the light that jets out from causing the damage to viewer's eyes, through setting up the diffusion groove, and the diffusion groove shape is the arc, can scatter light, makes light even.)

1. An orthographic projection screen with a linear fresnel lens layer, comprising a universally movable wheel (1), characterized in that: the top of the universal moving wheel (1) is fixedly connected with a moving box (2), a lifting cavity (3) is formed in the moving box (2), the top of the moving box (2) is fixedly connected with a cleaning box (4), and a lifting mechanism (5) is arranged in the middle of the bottom of the lifting cavity (3);

elevating system (5) are including first motor (501), first belt pulley (502), first belt (503), second belt pulley (504), dwang (505) and ball nut are vice (506), first motor (501) fixed connection is in the middle of lift chamber (3) bottom, first belt pulley (502) fixed connection is in first motor (501) output shaft, first belt (503) right-hand member transmission connection is in first belt pulley (502), second belt pulley (504) transmission connection is in first belt pulley (503) left end, dwang (505) fixed connection is in second belt pulley (504) center, ball nut is vice (506) fixed connection in dwang (505) top.

2. A front projection screen having a linear fresnel lens layer as defined in claim 1, wherein: elevating system (5) are still including lead screw (507), elevator (508) and fresnel projection screen (509), lead screw (507) threaded connection is in ball nut pair (506) middle part, elevator (508) fixed connection is in lead screw (507) top, fresnel projection screen (509) fixed connection is in elevator (508) right side.

3. A front projection screen having a linear fresnel lens layer as defined in claim 2, wherein: the Fresnel projection screen (509) comprises a light entering plate (701), a light expansion groove (702), a light gathering plate (703), a reflecting plate (704), a Fresnel lens layer (705) and a color changing plate (706), wherein the light expansion groove (702) is formed in the back of the light entering plate (701), the light gathering plate (703) is fixedly connected to the front of the light entering plate (701), the reflecting plate (704) is fixedly connected to the inner top of the light gathering plate (703), the Fresnel lens layer (705) is fixedly connected to the front of the light gathering plate (703), and the color changing plate (706) is fixedly connected to the front of the Fresnel lens layer (705).

4. A front projection screen having a linear fresnel lens layer according to claim 3, wherein: dwang (505) top surface fixed connection has the inner circle of first bearing, left side top in the outer lane fixed connection movable box (2) of first bearing, the inner circle of dwang (505) bottom surface fixed connection has the second bearing, bottom left side in the outer lane fixed connection movable box (2) of second bearing.

5. A front projection screen having a linear fresnel lens layer as defined in claim 4, wherein: lead screw (507) top runs through removal case (2) top left side and cleaning box (4) bottom left side and extends to cleaning box (4) internal fixation and connects elevator (508) bottom, elevator (508) left side rotation is connected with the pulley, pulley sliding connection cleaning box (4) left side inner wall.

6. A front projection screen having a linear fresnel lens layer as defined in claim 5, wherein: the number of the first belt (503), the second belt wheel (504), the rotating rod (505), the ball nut pair (506), the screw rod (507) and the lifting block (508) is two, and the first belt (503), the second belt wheel (504), the rotating rod (505), the ball nut pair (506), the screw rod (507) and the lifting block (508) are symmetrically distributed on the left side and the right side of the first motor (501).

7. A front projection screen having a linear fresnel lens layer as defined in claim 6, wherein: the color of the backlight surface of the color changing plate (706) is warm, and the thickness of the color changing plate (706) is 1 mm.

8. A front projection screen having a linear fresnel lens layer as defined in claim 7, wherein: the reflecting plate (704) is made of an aluminum sheet, and the thickness of the reflecting plate (704) is 0.5 mm.

Technical Field

The invention relates to the technical field of projection screens, in particular to an orthographic projection screen with a linear Fresnel lens layer.

Background

The primary application fields of fresnel lenses at present include projection and solar photovoltaic fields. Because the edge of the light emitted by the Fresnel lens is relatively soft, it is commonly used in tinted lamps. A colored plastic film is placed on the support in front of the lens to dye the light, and a metal gauze or frosted plastic can also be placed to disperse the light. Many devices that include fresnel lenses allow the lamp to move back and forth in focus to magnify or reduce the size of the beam are well suited for use in lenticular projectors, rear projection televisions, slide projectors, and collimators, not only because the light transmitted through them is brighter than through a conventional lens, but also because the brightness of the entire light transmitted through it is relatively uniform at various locations.

The height of the existing orthographic projection screen with the linear Fresnel lens layer cannot be adjusted when the orthographic projection screen is used, so that the existing orthographic projection screen with the linear Fresnel lens layer cannot contact more light rays, and meanwhile, the color changing is not arranged, so that the irradiated light damages eyes.

Disclosure of Invention

It is an object of the present invention to provide an orthographic projection screen having a linear fresnel lens layer to solve the above-mentioned problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an orthographic projection screen with linear fresnel lens layer, includes the universal wheel that removes, universal removal wheel top fixedly connected with removes the case, it has the lift chamber to have seted up in the removal incasement, remove case top fixedly connected with cleaning box, be provided with elevating system in the middle of the lift chamber bottom.

Elevating system is including first motor, first belt pulley, first belt, second belt pulley, dwang and ball nut are vice, first motor fixed connection is in the middle of the lift chamber bottom, first belt pulley fixed connection is in first motor output shaft, first belt right-hand member transmission is connected in first belt pulley, second belt pulley transmission is connected in first belt left end, dwang fixed connection is in second belt pulley center, the vice fixed connection of ball nut is top in the dwang.

Preferably, the lifting mechanism further comprises a screw rod, a lifting block and a Fresnel projection screen, the screw rod is connected to the middle of the ball nut pair in a threaded mode, the lifting block is fixedly connected to the top of the screw rod, and the Fresnel projection screen is fixedly connected to the right side of the lifting block.

Preferably, the fresnel projection screen comprises a light entering plate, a light expansion groove, a light gathering plate, a reflecting plate, a fresnel lens layer and a color changing plate, wherein the light expansion groove is formed in the back of the light entering plate, the light gathering plate is fixedly connected to the front of the light entering plate, the reflecting plate is fixedly connected to the inner top of the light gathering plate, the fresnel lens layer is fixedly connected to the front of the light gathering plate, and the color changing plate is fixedly connected to the front of the fresnel lens layer.

Preferably, the outer fixed surface in dwang top is connected with the inner circle of first bearing, the outer lane fixed connection of first bearing removes incasement left side top, the outer fixed surface in dwang bottom is connected with the inner circle of second bearing, the outer lane fixed connection of second bearing removes incasement bottom left side.

Preferably, the top end of the screw rod penetrates through the left side of the top of the movable box and the left side of the bottom of the cleaning box and extends to the bottom of a lifting block fixedly connected in the cleaning box, the left side of the lifting block is rotatably connected with a pulley, and the pulley is connected with the inner wall of the left side of the cleaning box in a sliding manner.

Preferably, first belt, second belt pulley, dwang, ball nut are vice, lead screw and elevator quantity are two, two first belt, second belt pulley, dwang, ball nut are vice, lead screw and elevator symmetric distribution are in the first motor left and right sides.

Preferably, the backlight surface color of the color changing plate is warm, the thickness of the color changing plate is 1mm, and the projected light color can be converted into warm color by arranging the color changing plate, so that the orthographic projection screen has the function of protecting eyes.

Preferably, the reflecting plate is made of an aluminum sheet, is 0.5mm thick, can transmit high visible light reflectivity, and is used for reflecting incident light of a projector.

Compared with the prior art, the invention provides an orthographic projection screen with a linear Fresnel lens layer, which has the following beneficial effects:

1. this orthographic projection screen with linear fresnel lens layer through setting up the universal wheel that removes, can make the device have the function of being convenient for to remove, through setting up first bearing and the second bearing on the dwang, can prevent that the dwang from moving the incasement wall and rotating and make and move the incasement wall and harm.

2. This orthographic projection screen with linear fresnel lens layer through setting up elevating system, starts first motor, and first motor drives the fresnel projection screen that drives elevator block right side and can go up and down in the clearance incasement, makes the device have the function that goes up and down fresnel projection screen, can make the device carry out the function adjusted to fresnel projection screen position.

3. This orthographic projection screen with linear fresnel lens layer is the aluminum sheet through setting up the reflecting plate material, can have high visible light reflectivity for the incident light of reflection projecting apparatus, trades the color board shady face colour through the setting and is the warm tone, can filter the light colour that gets into, prevents that the light that jets out from causing the damage to viewer's eyes, through setting up the diffusion groove, and the diffusion groove shape is the arc, can scatter light, makes light even.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor

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

FIG. 2 is a schematic cross-sectional front view of the present invention;

FIG. 3 is a left side view schematic diagram of a Fresnel projection screen according to the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 2;

fig. 5 is an enlarged schematic view of B in fig. 3.

In the figure: 1. a universal moving wheel; 2. a mobile box; 3. a lifting cavity; 4. cleaning the box; 5. a lifting mechanism; 501. a first motor; 502. a first pulley; 503. a first belt; 504. a second pulley; 505. rotating the rod; 506. a ball nut pair; 507. a screw rod; 508. a lifting block; 509. a Fresnel projection screen; 701. a light incident plate; 702. a light diffusion groove; 703. a light-gathering plate; 704. a reflective plate; 705. a Fresnel lens layer; 706. and (4) a color changing plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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

Referring to fig. 1-5, the present invention provides a technical solution: an orthographic projection screen with a linear Fresnel lens layer comprises a universal moving wheel 1, a moving box 2 is fixedly connected with the top of the universal moving wheel 1, a lifting cavity 3 is arranged in the moving box 2, a cleaning box 4 is fixedly connected with the top of the moving box 2, a lifting mechanism 5 is arranged in the middle of the bottom of the lifting cavity 3, and by arranging the universal moving wheel 1, the device can be provided with a function of facilitating movement, and by the first bearing and the second bearing provided on the rotation lever 505, can prevent that dwang 505 from rotating and making 2 inner walls of mobile box damage at 2 inner walls of mobile box, through setting up elevating system 5, start first motor 501, first motor 501 drives fresnel projection screen 509 that drives elevator block 508 right side and can go up and down in clearance case 4, makes the device have the function that goes up and down fresnel projection screen 509, can make the device carry out the function of adjusting to fresnel projection screen 509 position.

The lifting mechanism 5 comprises a first motor 501, a first belt pulley 502, a first belt 503, a second belt pulley 504, a rotating rod 505 and a ball nut pair 506, the first motor 501 is fixedly connected in the middle of the bottom of the lifting cavity 3, the first belt pulley 502 is fixedly connected to an output shaft of the first motor 501, a right end of the first belt 503 is in transmission connection with the first belt pulley 502, the second belt pulley 504 is in transmission connection with a left end of the first belt 503, the rotating rod 505 is fixedly connected to the center of the second belt pulley 504, an outer surface of a top end of the rotating rod 505 is fixedly connected with an inner ring of a first bearing, an outer ring of the first bearing is fixedly connected with a top portion of a left side in the movable box 2, an outer surface of a bottom end of the rotating rod 505 is fixedly connected with an inner ring of a second bearing, an outer ring of the second bearing is fixedly connected with a left side of a bottom portion in the movable box 2, the ball nut pair 506 is fixedly connected with a top portion in the rotating rod 505, the lifting mechanism 5 further comprises a screw rod 507, A lifting block 508 and a Fresnel projection screen 509, a screw 507 is connected with the middle part of the ball nut pair 506 in a threaded manner, the top end of the screw 507 penetrates through the left side of the top of the movable box 2 and the left side of the bottom of the cleaning box 4 and extends to the bottom of the lifting block 508 fixedly connected in the cleaning box 4, the left side of the lifting block 508 is connected with a pulley in a rotating manner, the pulley is connected with the inner wall of the left side of the cleaning box 4 in a sliding manner, the number of the first belt 503, the second belt 504, the rotating rod 505, the ball nut pair 506, the screw 507 and the lifting block 508 are two, the two first belt 503, the second belt 504, the rotating rod 505, the ball nut pair 506, the screw 507 and the lifting block 508 are symmetrically distributed at the left side and the right side of the first motor 501, the lifting block 508 is fixedly connected with the top of the screw 507, the Fresnel projection screen 509 is fixedly connected with the right side of the lifting block 508, the Fresnel projection screen 509 comprises a light inlet plate 701, a light diffusion groove 702, a light collection plate 703, a reflection plate 704 and a reflection plate 704, A Fresnel lens layer 705 and a color changing plate 706, wherein the back of the light incident plate 701 is provided with a light diffusion groove 702, the light condensing plate 703 is fixedly connected with the front of the light incident plate 701, a reflecting plate 704 is fixedly connected with the inner top of the light condensing plate 703, the Fresnel lens layer 705 is fixedly connected with the front of the light condensing plate 703, the color changing plate 706 is fixedly connected with the front of the Fresnel lens layer 705, the color of the back light surface of the color changing plate 706 is warm tone, the thickness of the color changing plate 706 is 1mm, the projected light color can be changed into warm color by arranging the color changing plate 706, so that the orthographic projection screen has the function of protecting eyes, the reflecting plate 704 is made of aluminum sheet, the thickness of the reflecting plate 704 is 0.5mm, the reflecting plate 704 can have high visible light reflectivity and is used for reflecting the incident light of the projector, the color of the back light surface is set to be warm tone by arranging the aluminum sheet 704, can filter the light colour that gets into, prevent that the light that jets out from causing the damage to viewer's eyes, through setting up light expansion groove 702, and light expansion groove 702 shape is the arc, can scatter light, makes light even.

In the practical operation process, when the device is used, the first motor 501 is started, the first motor 501 drives the first belt pulley 502 to rotate, when the first belt pulley 502 rotates, the first belt 503 is arranged to drive the second belt pulley 504 to rotate, the rotating rod 505 in the middle of the second belt pulley 504 can be rotated, the ball nut pair 506 at the top in the rotating rod 505 rotates along with the rotating rod, the screw rod 507 is fixed at the bottom of the lifting block 508, the screw rod 507 can be lifted in the ball nut pair 506, the Fresnel projection screen 509 at the right side of the lifting block 508 can be driven to lift in the cleaning box 4, and the device has the function of lifting the Fresnel projection screen 509.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.