CN209086660U - A kind of online education projection screen retractable volume mechanism - Google Patents

Abstract

The utility model provides a kind of online education projection screen retractable volume mechanism, including rack, the top of rack is equipped with and unreels roller, the axial position for unreeling roller is equipped with unreeling shaft, unreeling shaft is mounted on the top of rack, and the lower part of rack is equipped with winding roller, and the axial position for winding roller is equipped with Scroll, Scroll is mounted on the lower part of rack, and winding roller is in parallel arrangement with roller is unreeled；The medium position of rack is equipped with tensioning regulating mechanism；The tensioning regulating mechanism is mounted on winding roller and unreels between roller.The utility model can carry out tensioning adjusting to projection screen by being tensioned regulating mechanism with during unreeling in winding, keep projection screen tensioning flexible adjustment better；Tensioning adjusting is carried out to projection screen by belt tensioning drum, and the dust on projection screen sweep falling by tapetum, and adsorb dust into shell by suction ventilator, solves the problems, such as to be not easy to handle the dust on screen.

Description

An online education projection screen retracting and unwinding mechanism

technical field

The utility model relates to an on-line education projection screen retracting and unwinding mechanism, which belongs to the field of retracting and unwinding mechanisms.

Background technique

The projection screen is one of the most commonly used products in the peripheral equipment of the projector. The projection screen is the abbreviation of the projection screen; if the projection screen is properly matched with the projector, the high-quality projection effect can be obtained. The transparent series has a unique transparent imaging feature, which ensures high-quality image projection, and at the same time, the viewer can see the scene behind the screen. It is an ideal choice for glass window or interactive display. It is a novel transparent screen that captures the curiosity and attention of viewers and enhances the design taste of the venue. It is about transparent and suspended in mid-air. The clever design brings out a three-dimensional visual perception, increases the sense of space of the venue, and makes inspiration and technology fashionable. permeates the entire environment. The existing projection screen is inconvenient for unwinding and rewinding, and the operation efficiency of tensioning and adjusting the projection screen during the unwinding and rewinding process is low, the tensioning adjustment operation is inconvenient, and it is inconvenient to adjust the tension on the screen. the problem of dust handling.

Utility model content

In view of the deficiencies in the prior art, the purpose of this utility model is to provide an online education projection screen retracting and unwinding mechanism, so as to solve the problem that the prior art projection screen is inconvenient to unwind and unwind. The tension adjustment operation of the projection screen during the rolling process is inefficient, the tension adjustment operation is inconvenient, and it is inconvenient to deal with the dust on the screen.

In order to achieve the above purpose, the utility model is realized by the following technical solutions: an online education projection screen retracting and unwinding mechanism, comprising a frame, a first gear rack, a second gear rack, an unwinding shaft, and an unwinding roller , the winding drum, the winding shaft, the tension adjustment mechanism and the dust removal device, the middle part of the top side of the left end face of the first gear frame and the middle part of the bottom side of the left end face are bolted to the middle part of the top side of the right end face of the frame, the second The middle part of the top side of the right end face of the gear rack and the middle part of the bottom side of the right end face are bolted to the middle part of the top side of the left end face of the rack. The middle part of the right end face and the middle part of the left end face of the first gear frame are connected by rotation, and the left end face of the unwinding shaft is inserted into the middle part of the right end face of the winding drum, and the winding drum and the unwinding drum are parallel to the horizontal line. Distribution, the left outer end face of the winding shaft and the inner middle end face of the winding drum are rotatably connected, and the left and right end faces of the winding shaft are respectively plugged with the bottom side middle of the left and right end faces inside the frame. The middle part of the bottom side, and the tension adjustment mechanism is located on the top surface of the winding drum, the dust removal device is arranged in the middle part of the top surface of the frame, and the tension adjustment mechanism consists of a first tension drum, a first adjustment shaft, a first gear , the second adjusting shaft, the second tensioning roller, the second gear, the first hydraulic cylinder, the first piston rod, the first lifting seat, the second hydraulic cylinder, the second piston rod and the second lifting seat. The left end face of an adjustment shaft runs through the middle of the right end face of the first tensioning drum, and the middle parts of the left and right end faces of the first adjustment shaft are respectively welded with the middle parts of the inner left and right end faces of the two first gears arranged on the left and right end faces of the first tension drum. The left end face of the two adjustment shafts runs through the middle of the right end face of the second tensioning drum, and the middle part of the left and right end faces of the second adjustment shaft is welded with the middle part of the left and right end faces of the inner side of the second gear set on the left and right end faces of the second tension drum respectively. The middle part of the top end surface and the middle part of the bottom end surface of the first gear mesh with each other, the outer bottom end surface of the first piston rod is slidably connected to the inner part of the middle part of the top end surface of the first hydraulic cylinder, and the middle part of the bottom end surface of the first lifting seat is connected with the top end of the first piston rod. The middle part of the face is connected by bolts, and the middle part of the top side and the middle part of the bottom end face of the left end face of the first lifting seat are respectively connected with the middle part of the right end face of the first gear and the middle part of the right end face of the second gear through two inserted rods. The outer bottom end of the rod is slidably connected to the inner side of the middle part of the top surface of the second hydraulic cylinder; the middle part of the bottom end surface of the second lifting seat is bolted to the middle part of the top surface of the second piston rod; The middle part of the bottom side is rotatably connected with the middle part of the left end face of the first gear and the middle part of the left end face of the second gear through two inserted rods, and the middle part of the front end face of the first tensioning drum and the middle part of the front end surface of the second tensioning drum are connected with the frame. The middle part of the front end face is slidably connected. The dust removal device is composed of a casing, a suction fan, an exhaust port, a filter screen, a suction hood, a fluff layer, a port, a baffle and a power cord. The middle part of the left and right end faces of the suction fan is connected to the casing. The inner left and right end faces are bolted to the top and middle of the top side, and the exhaust port is provided with In the middle part of the top surface of the casing, the middle part of the left and right end surfaces of the filter screen is inserted into the middle part of the bottom side of the left and right end surfaces of the inner side of the casing; The top surface of the fluff layer is inserted into the middle part of the bottom end surface of the suction hood, two or more of the through openings are arranged at equal intervals in the middle part of the bottom end surface of the suction hood, the shape of the baffle is an upward arc, and the baffle is arranged in an upward arc. Weld the middle part on the right side of the bottom end face of the power cord with the middle part of the bottom end face inside the casing, the bottom end face of the power cord is plugged with the middle part on the right side of the top face of the casing, and the middle part of the left and right ends of the bottom end face of the casing is bolted to the middle part of the top face of the rack. , the power line is electrically connected with an external control switch.

Further, the shape and size of the first hydraulic cylinder, the first piston rod and the first lifting seat are respectively equal to the shape and size of the second hydraulic cylinder, the second piston rod and the second lifting seat, which is conducive to the simultaneous adjustment of the first tensioning drum and the second lifting seat. Adjust the height of the second tensioning drum.

Further, the horizontal middle portion of the left end face of the first gear rack and the horizontal middle portion of the right end face of the second gear rack are provided with two or more gear holes corresponding to the shape and size of the outer diameter of the unwinding shaft at equal intervals, which is beneficial to The left and right end faces of the unwinding shaft are respectively placed and installed in the gear holes provided in the middle part of the right end face of the second gear frame and the middle part of the left end face of the first gear frame.

Further, the surfaces of the unwinding drum and the winding drum are both provided with a ceramic layer, which is beneficial to prevent the surface of the projection screen from being damaged by rough surfaces of the unwinding drum and the winding drum.

Further, the distribution length of the fluff layer is equal to the length of the top end surface of the unwinding drum, which is beneficial for the fluff layer to sweep the dust on the projection screen on the unwinding drum.

Further, the lengths of the unwinding drum and the winding drum are equal in size, which facilitates the retraction of the projection screen on the unwinding drum on the winding drum.

Further, the model of the suction fan is BL-B190B-EC-03 suction fan, which has the advantage of sufficient noise suction.

Further, the first gear and the second gear are made of stainless steel, which has the advantage of good corrosion resistance.

The online education projection screen retracting and unwinding mechanism of the utility model is provided with a tensioning adjusting mechanism at the bottom end of the frame, and the first and second hydraulic cylinders respectively push the first and second piston rods. Move up or down, thereby driving the first lifting seat and the second lifting seat to move up and down, so that the first tensioning roller and the second tensioning roller roll up and down on the front end of the rack to project the projection on the rack The screen moves up and down, tightens when moving upwards, and unwinds when moving downwards, which solves the problem of low operating efficiency in adjusting the tension of the projection screen during unwinding and rewinding. On the top surface of the rack, the dust on the projection screen is swept off through the fluff layer, and the dust is absorbed into the casing by the suction fan, and the dust is concentrated on the left end of the bottom inner side of the casing through the baffle, which solves the problem of inconvenience to the screen. on the dust to deal with the problem.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural schematic diagram of the tensioning adjustment mechanism of the utility model;

3 is a schematic structural diagram of a dust removal device of the present invention;

In the figure: frame-1, first gear frame-2, second gear frame-3, unwinding shaft-4, unwinding roller-5, winding roller-6, winding shaft-7, tension adjustment mechanism -8. Dust removal device-9, first tensioning roller-81, first adjusting shaft-82, first gear-83, second adjusting shaft-84, second tensioning roller-85, second gear-86, The first hydraulic cylinder-87, the first piston rod-88, the first lifting seat-89, the second hydraulic cylinder-810, the second piston rod-811, the second lifting seat-812, the casing-91, the suction fan-92 , exhaust port-93, filter-94, suction hood-95, fluff layer-96, port-97, baffle-98, power cord-99.

Detailed ways

In order to make the technical means, creation features, achievement goals and effects of the present invention easy to understand and understand, the present invention will be further described below with reference to the specific embodiments.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , the present invention provides an online education projection screen retracting and unwinding mechanism: comprising a frame 1 , a first gear rack 2 , a second gear rack 3 , an unwinding shaft 4 , a The winding drum 5 , the winding drum 6 , the winding shaft 7 , the tensioning adjustment mechanism 8 and the dust removal device 9 Bolt connection, the middle part of the top side of the right end face of the second gear frame 3 and the middle part of the bottom side of the right end face are bolted to the middle part of the top side of the left end face of the frame 1, and the left and right end faces of the unwinding shaft 4 respectively penetrate through the middle part of the top side of the left and right end faces inside the frame 1 Then it is connected with the gear hole provided in the middle part of the right end face of the second gear frame 3 and the middle part of the left end face of the first gear frame 2, and the left end face of the unwinding shaft 4 is inserted into the middle part of the right end face of the rewinding drum 6. The winding drum 6 and the unwinding drum 5 are distributed in parallel with the horizontal line, the left outer end face of the winding shaft 7 is rotatably connected with the inner middle end face of the winding drum 6, and the left and right end faces of the winding shaft 7 are respectively inserted into the bottom side middle of the left and right end faces of the frame 1. Then, the tension adjustment mechanism 8 is arranged in the middle of the bottom side of the frame 1, and the tension adjustment mechanism 8 is located at the top surface of the winding drum 6, the dust removal device 9 is arranged in the middle of the top surface of the frame 1, and the tension adjustment mechanism 8 is composed of The first tension roller 81, the first adjustment shaft 82, the first gear 83, the second adjustment shaft 84, the second tension roller 85, the second gear 86, the first hydraulic cylinder 87, the first piston rod 88, the first The lifting seat 89, the second hydraulic cylinder 810, the second piston rod 811 and the second lifting seat 812 are composed. The left end face of the first adjusting shaft 82 runs through the middle of the right end face of the first tensioning drum 81, and the left and right end faces of the first adjusting shaft 82 The middle part is welded with the middle part of the left and right end surfaces of the two first gears 83 provided on the left and right end surfaces of the first tensioning drum 81 respectively. The middle of the left and right end faces of 84 are respectively welded with the middle of the left and right end faces of the second gear 86 on the left and right end faces of the second tension drum 85. The middle of the top end face of the second gear 86 meshes with the middle of the bottom end face of the first gear 83. The outer bottom end face is slidably connected to the inner side of the top end face of the first hydraulic cylinder 87, the bottom end face of the first lift seat 89 is bolted to the top end face of the first piston rod 88, and the top side middle of the left end face of the first lift seat 89 and The middle part of the bottom end face is rotatably connected to the middle part of the right end face of the first gear 83 and the middle part of the right end face of the second gear 86 through two inserted rods, respectively. The middle part of the bottom end surface of the second lifting seat 812 is bolted to the middle part of the top end surface of the second piston rod 811, and the middle part of the top side of the right end surface of the second lifting seat 812 and the middle part of the bottom side of the right end surface of the second lifting seat 812 are connected to the first The middle part of the left end face of the gear 83 and the middle part of the left end face of the second gear 86 are connected in rotation; The dust removal device 9 is composed of a casing 91, a suction fan 92, an exhaust port 93, a filter screen 94, a suction cover 95, a fluff layer 96, a port 97, a baffle 98 and a power cord 99. The middle of the left and right end faces of the suction fan 92 is connected to the casing. The top and middle parts of the left and right end faces of the inner side of 91 are connected by bolts. The exhaust port 93 is arranged in the middle of the top side of the casing 91. The set cannula is threadedly connected to the inner side of the middle part on the right side of the bottom end face of the casing 91; In the middle of the end face, the baffle 98 has an upward arc shape, and the middle part on the right side of the bottom end face of the baffle plate 98 is welded with the middle part of the bottom end face inside the casing 91, and the bottom end face of the power cord 99 is inserted into the middle part on the right side of the top face of the casing 91, The middle part of the left and right ends of the bottom end face of the casing 91 is bolted to the middle part of the top end face of the frame 1; The shapes and sizes of the second hydraulic cylinder 810 , the second piston rod 811 and the second lifting seat 812 are equal, which is beneficial to adjust the heights of the first tensioning drum 81 and the second tensioning drum 85 at the same time. The horizontal middle part of the left end face of the second gear frame 3 and the horizontal middle part of the right end face of the second gear frame 3 are provided with two or more gear holes corresponding to the shape and size of the outer diameter of the unwinding shaft 4 at equal intervals, which is conducive to placing the left and right end faces of the unwinding shaft 4 respectively. Installed in the gear hole set in the middle of the right end face of the second gear frame 3 and the middle of the left end face of the first gear frame 2, the surfaces of the unwinding drum 5 and the rewinding drum 6 are both provided with ceramic layers, which is conducive to preventing unwinding. The rough surfaces of the reeling drum 5 and the rewinding drum 6 damage the surface of the projection screen, and the distribution length of the fluff layer 96 is equal to the length of the top surface of the unwinding drum 5, which is conducive to making the fluff layer 96 remove the surface of the unwinding drum 5. The dust on the projection screen is swept away, and the lengths of the unwinding drum 5 and the winding drum 6 are equal, which is conducive to making the projection screen on the unwinding drum 5 retracted on the winding drum 6. The suction fan 92 is BL-B190B -EC-03 suction fan, the advantage is that the noise suction is sufficient, the first gear 83 and the second gear 86 are made of stainless steel, and the advantage is that it has good corrosion resistance.

The first hydraulic cylinder described in this patent is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. The reduction gear can be omitted, and there is no transmission gap, and the movement is stable, so it is widely used in various mechanical hydraulic systems.

When the user wants to use this patent, firstly, the actuator of the projection screen is controlled by an external controller to be powered up, so that the projection screen on the unwinding drum 5 is rotated through the unwinding shaft 4 to move the projection screen downward, And the lowered projection screen is fixed with the middle of the front end face of the take-up drum 6. When the tension of the projection screen needs to be adjusted, the hydraulic oil in the first hydraulic cylinder 87 and the second hydraulic cylinder 810 drives the first hydraulic cylinder 87 and the second hydraulic cylinder 810 respectively. A piston rod 88 and a second piston rod 811 move up and down, so that the first piston rod 88 and the second piston rod 811 respectively drive the first lifting seat 89 and the second lifting seat 812 on the top to move up and down, so that the first The lifting seat 89 and the second lifting seat 812 drive the first gear 83 and the second gear 86 to move up and down, so that the first gear 83 and the second gear 86 drive the first sheet through the first adjusting shaft 82 and the second adjusting shaft 84 The tension roller 81 and the second tension roller 85 move up and down, and the first tension roller 81 and the second tension roller 85 move up and down while rolling up and down with the projection screen on the rear surface of the rack 1. Tension is performed, the projection cloth is stretched when rolling down, and when the projection screen is placed, the projection screen is contacted by the fluff layer 96 and the dust on the projection screen is swept off, and the suction fan 92 is energized to generate The dust is sucked into the casing 91 through the opening by suction, and the dust is concentrated and placed on the left end of the inner bottom of the casing 91 through the baffle 98 .

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and does not deviate from the present invention. The present invention can be implemented in other specific forms under the condition of the spirit or basic features. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. a kind of online education projection screen retractable volume mechanism, including rack (1), the first gear frame (2), the second gear frame (3), put Spool (4) unreels roller (5), winding roller (6) and Scroll (7), it is characterised in that: further include be tensioned regulating mechanism (8) and It is pushed up in the middle part of dust-extraction unit (9), the first gear frame (2) left side top central portion and left side bottom side with rack (1) right side Middle side part is bolted, left with rack (1) in the middle part of the second gear frame (3) right side top central portion and right side bottom side End face top central portion is bolted, and unreeling shaft (4) the left and right end face extends through the left and right end face on the inside of rack (1) and pushes up It is carried out after middle side part with gear hole set by the middle part of in the middle part of second gear frame (3) right side and first gear frame (2) left side Rotation connection, and unreeling shaft (4) left side and winding roller (6) right side in the middle part of carry out grafting, the winding roller (6) and Roller (5) are unreeled in horizontal line parallelly distribute on, the left outside side end face of the Scroll (7) and winding roller (6) middle inside end face It is rotatablely connected, and Scroll (7) left and right end face carries out grafting with left and right end face bottom side middle part on the inside of rack (1) respectively, Tensioning regulating mechanism (8) is set in the middle part of the bottom side of rack (1), and is tensioned regulating mechanism (8) and is located at winding roller (6) Top end face, the dust-extraction unit (9) is set in the middle part of rack (1) top end face, and the tensioning regulating mechanism (8) is tensioned by first Roller (81), the first adjustment axis (82), first gear (83), the second adjustment axis (84), the second belt tensioning drum (85), second gear (86), first hydraulic cylinder (87), First piston bar (88), first lifting seat (89), second hydraulic cylinder (810), second piston bar (811) it is formed with the second lifting seat (812), the first adjustment axis (82) left side is through the first belt tensioning drum (81) right end Middle face, and two with the setting of the first belt tensioning drum (81) left and right end face respectively in the middle part of the first adjustment axis (82) left and right end face It is welded in the middle part of the end face of left and right on the inside of first gear (83), the second adjustment axis (84) left side is rolled through the second tensioning Cylinder (85) right side in the middle part of, and the second adjustment axis (84) left and right end face in the middle part of respectively with the second belt tensioning drum (85) left and right end face It is welded in the middle part of the end face of left and right on the inside of the second gear (86) of setting, second gear (86) the top end face middle part and the first tooth It takes turns and is intermeshed in the middle part of (83) bottom face, in First piston bar (88) the outer lower end face and first hydraulic cylinder (87) top end face It is slidably connected on the inside of portion, is carried out in the middle part of first lifting seat (89) bottom face in the middle part of First piston bar (88) top end face Be bolted, and in the middle part of first lifting seat (89) left side top central portion and bottom face respectively by two root cutting bars of setting with It is rotatablely connected in the middle part of first gear (83) right side and in the middle part of second gear (86) right side, the second piston bar (811) outer lower end is slidably connected with second hydraulic cylinder (810) top end face inside middle portion, second lifting seat (812) It is bolted in the middle part of bottom face with second piston bar (811) top end face middle part, and the second lifting seat (812) right side is pushed up Pass through two root cutting bars of setting and first gear (83) left side middle part and the second tooth in the middle part of middle side part and right side bottom side respectively Wheel is rotatablely connected in the middle part of (86) left side, the first belt tensioning drum (81) front end face middle part and the second belt tensioning drum (85) It is slidably connected in the middle part of front end face with rack (1) front end face middle part, the dust-extraction unit (9) is by shell (91), suction ventilator (92), exhaust outlet (93), filter screen (94), air-suction cover (95), tapetum (96), port (97), baffle (98) and power supply line (99) it forms, carries out bolt company with left and right end face top central portion on the inside of shell (91) in the middle part of suction ventilator (92) the left and right end face It connects, the exhaust outlet (93) is set in the middle part of shell (91) top end face, filter screen (94) the left and right end face middle part and shell (91) grafting is carried out in the middle part of the left and right end face bottom side of inside, passes through the intubation and shell of setting in the middle part of air-suction cover (95) top end face (91) it is threadedly coupled on the inside of bottom face right side central, in the middle part of tapetum (96) top end face and air-suction cover (95) bottom face Grafting is carried out, there are two above in air-suction cover (95) bottom face middle part, the baffle (98) for port (97) spaced set Shape is in upward arc, and the bottom face right side central of baffle (98) is welded with shell (91) inner bottom Middle face It connects, power supply line (99) bottom face and shell (91) top end face right side central carry out grafting, and shell (91) bottom face is left It is bolted in the middle part of right both ends with rack (1) top end face middle part, the power supply line (99) and external control switch carry out Electrical connection.

2. a kind of online education projection screen retractable volume mechanism according to claim 1, it is characterised in that: described first is hydraulic Cylinder (87), First piston bar (88) and first lifting seat (89) respectively with second hydraulic cylinder (810), second piston bar (811) and The shape size of second lifting seat (812) is equal.

3. a kind of online education projection screen retractable volume mechanism according to claim 1, it is characterised in that: first gear The left side horizontal middle of frame (2) and the horizontal middle of second gear frame (3) right side be equidistantly provided with it is more than two with The corresponding gear hole of unreeling shaft (4) outer diameter shape size.

4. a kind of online education projection screen retractable volume mechanism according to claim 1, it is characterised in that: described to unreel roller (5) and the surface of winding roller (6) is equipped with ceramic layer.

5. a kind of online education projection screen retractable volume mechanism according to claim 1, it is characterised in that: the tapetum (96) distribution length and the top end face equal length for unreeling roller (5).

6. a kind of online education projection screen retractable volume mechanism according to claim 1, it is characterised in that: described to unreel roller (5) and the length scale of winding roller (6) is equal.