CN209980008U

CN209980008U - Portable projection curtain device

Info

Publication number: CN209980008U
Application number: CN201921194703.7U
Authority: CN
Inventors: 范东海
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-01-21
Anticipated expiration: 2029-07-29

Abstract

The utility model discloses a portable projection curtain device, including the projection curtain, articulated seat, the hinge bar, the half casing of base and two symmetric distributions, two half casings can splice to a whole casing, all be equipped with the curtain spool in two half casings, the lead screw, driving motor, the nut is vice, the clamp plate, the universal wheel support, the pull rod, battery and gyro wheel support, projection curtain both ends are fixed respectively on two curtain spools, driving motor drives the curtain spool rotation, the curtain spool rotation unreels the projection curtain, the curtain spool drives the lead screw rotation, it makes two hinge bar semi casings that the butt-lift propped open two concatenations to make the vice lift of nut, the universal wheel can together screw out simultaneously, through the universal wheel portable position of can being convenient for after the projection curtain expandes. The utility model discloses a handle pulling device, portable is equipped with the gyro wheel, is convenient for remove, is applicable to multiple interim projection work occasion, and when not using, two semi-shells splice into a whole casing, are convenient for transport and accomodate.

Description

Portable projection curtain device

Technical Field

The utility model relates to a projection curtain technical field, especially a portable projection curtain device.

Background

With the advent of projectors, both teaching and presentation work can be performed more quickly and conveniently. Projection screens are tools for displaying images and video files in the fields of movies, offices, home theaters, large conferences, etc., and the selection of projection screens in different spaces is different.

The conventional projection screen is usually fixed on a wall, so that the projector can project an image to be displayed. However, if a projection screen is not installed in a teaching or presentation place or a temporary projection work is performed in some places, a temporary construction of the projection screen is needed, the construction of the projection screen is complicated, and the preparation of the projection screen becomes a great trouble and needs to be further improved so as to be beneficial to the implementation of the teaching or presentation work. Therefore, it is necessary to develop a portable projection screen apparatus to solve this problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem and designing a portable projection curtain device.

The technical scheme of the utility model is that, the portable projection screen device comprises a projection screen, a hinged seat, hinged rods, a base and two symmetrically distributed semi-shells, wherein the semi-shells are provided with a winding switch and an unwinding switch for controlling the work of a driving motor, the hinged seat is fixed on the base, the hinged seat is hinged with the two symmetrically distributed hinged rods, the two semi-shells can be spliced into a whole shell, the two semi-shells are internally provided with a screen scroll, a lead screw, a driving motor, a nut pair, a pressing plate, a universal wheel bracket, a pull rod, a storage battery and a roller bracket, two ends of the projection screen are respectively fixed on the two screen scrolls, the screen scroll is parallel to the lead screw, the lower end of the screen scroll is rotatably arranged on the lower end surface of the semi-shell through a first bearing, the output end of the driving motor is connected with the top end of the screen scroll, the curtain roller is characterized in that a first gear is installed at the upper end of the curtain roller shaft, the upper end and the lower end of the lead screw are rotatably installed on the upper end face and the lower end face of the semi-shell through two second bearings, a second gear meshed with the first gear is installed at the upper end of the lead screw, a nut pair is connected onto the lead screw in a threaded manner and is hinged with hinge rods on opposite sides of the nut pair, a roller support and two universal wheel supports which are symmetrically distributed are hinged to the inner bottom of the semi-shell, the universal wheel supports are further connected with the inner wall of the bottom end of the semi-shell through springs, universal wheels are installed on the universal wheel supports, a pressing plate is fixedly connected with the nut pair, the two universal wheel supports are pressed when the pressing plate descends to be screwed out from openings of the two side walls of the semi-shell, rollers are, one of the pull rods is hinged with a handle, and the handle can be clamped with the other pull rod after the two half shells are spliced into a whole shell. When the projection curtain is used, the lifting handle is firstly screwed out from a pull rod clamped with the lifting handle, the two half shells are not connected together, the unwinding switch is pressed, the storage battery supplies power for the driving motor, the driving motor selects a stepping motor, the driving motors in the two half shells work simultaneously, the driving motor drives a curtain scroll to rotate, the curtain scroll unwinds the projection curtain, the rotation directions of the two driving motors are opposite, so that the projection curtain is unwound simultaneously, the curtain scroll drives a second gear through the first gear, a lead screw rotates, a nut pair converts the rotation motion of the lead screw into linear motion and moves downwards, the two nut pairs synchronously descend, the nut pair drives one end of a hinged rod to descend, the two hinged rods prop the two half shells apart, and the half shells gradually slide out from the base; the pressing plate descends along with the nut pair, the pressing plate descends to prop open the two universal wheel supports, the distance between the upper ends of the two universal wheel supports is larger than the size of the corresponding edge of the pressing plate, so that the pressing plate can pass through the gap between the upper ends of the two universal wheel supports and gradually prop open the two universal wheel supports synchronously, the universal wheel supports and the universal wheels are screwed out from the opening, the spring is compressed under stress, when the universal wheel supports are completely screwed out, the driving motor stops rotating, the four universal wheels jointly support the whole device, and at the moment, the projection screen is completely unreeled;

after the projection screen is used, a winding switch is pressed, a storage battery supplies power for a driving motor, the driving motor drives a screen scroll to rotate reversely, the screen scroll winds the projection screen, a screw rod drives a nut pair and a pressing plate to rise, a hinge rod pulls half shells to enable the two half shells to gather together and to be gradually spliced into a whole, a universal wheel support is gradually screwed into the half shells under the elastic restoring force of a spring, when the two half shells are spliced into a whole, the driving motor stops rotating, a lifting handle is rotated, and a U-shaped groove of the lifting handle clamps the pulling rod; when needing the mobile device, mention the handle, the spacing ring blocks the handle, thereby make the handle can drive the pull rod and rise, the articulated section of pull rod removes in spacing mouthful, circular separation blade can support the gyro wheel support, prevent that the articulated section of pull rod from breaking away from spacing mouthful, the pull rod drives gyro wheel support one end and has been revolved, the gyro wheel even has the one end of gyro wheel to screw out from the opening, the gyro wheel back of screwing out and has certain inclination, the spacing position in lantern ring department of indent of pull rod this moment, revolve soon afterwards to revolve spacing the ball that bumps, spacing ball that bumps revolves to the spacing department of indent, thereby fixed pull rod, slope pulling handle afterwards, can be convenient for remove whole device under the support of gyro wheel.

The top end of the half shell is fixedly provided with a lantern ring, the upper end of the pull rod penetrates through the lantern ring, the lantern ring is radially tapped with a threaded hole, the threaded hole is in threaded connection with a limiting collision ball, and the upper end of the pull rod is provided with an inwards concave limiting part matched with the limiting collision ball. When the concave limiting part of the pull rod is positioned at the lantern ring, the limiting collision bead is screwed, and the limiting collision bead can be screwed to the concave limiting part, so that the pull rod is fixed.

The utility model discloses a spacing opening of gyro wheel support, pull rod, spacing opening, the spacing opening of rectangular shape is opened to the articulated one end of gyro wheel support and pull rod, the pull rod lower extreme is less than its upper end radial articulated section for the radius, the articulated section of pull rod is at spacing intraoral activity, the articulated section end of pull rod is fixed with the circular separation blade that is used for restricting pull rod and spacing mouthful and breaks away from, the width of spacing mouthful is greater than the diameter of the articulated section of pull rod, is less than the diameter of circular separation blade, drive gyro wheel support slope when the pull rod is lifted. When the handle drives the pull rod to ascend, the round blocking piece can abut against the roller wheel support, the hinged section of the pull rod only moves in the limiting opening, and the hinged section of the pull rod is prevented from being separated from the limiting opening.

The rotation directions of the driving motors in the two half shells are opposite when working simultaneously, and the thread directions of the two screw rods are opposite. Thereby realize unreeling simultaneously and rolling simultaneously of projection curtain, make two nut pairs can rise simultaneously and descend simultaneously.

A limiting ring is fixed on the pull rod, and a U-shaped groove matched with the limiting ring is formed in one end, connected with the pull rod, of the lifting handle in a clamping mode. After the two half shells are spliced into a whole shell, the U-shaped groove of the handle can rotate to the position where the pull rod is clamped, and when the handle is lifted, the limiting ring clamps the handle, so that the handle can drive the pull rod to ascend.

Four universal balls are arranged on the bottom end faces of the two half shells, so that the half shells can slide in and out of the base conveniently.

The two side faces of the base facing the two half shells are both inclined planes, so that the two half shells can smoothly slide in and out of the base 4 from the inclined planes.

Utilize the technical scheme of the utility model a portable projection curtain device of preparation, through handle pulling device, and is convenient for carry, it is convenient for remove to be equipped with the gyro wheel, be applicable to multiple interim projection work occasion, driving motor drive curtain spool during use, the lead screw is rotatory, make the projection curtain open automatically, the universal wheel support can together revolve down simultaneously, can be convenient for shift position through the universal wheel after the projection curtain expandes, after the use is accomplished, driving motor just can curl up the projection curtain, the semi-shell of universal wheel support screw in simultaneously, a whole casing is spliced into to two semi-shells, be convenient for transport and accomodate.

Drawings

Fig. 1 is a schematic structural view of a portable projection screen device according to the present invention;

fig. 2 is a first schematic view of the portable projection screen device according to the present invention (a projection screen is in a rolled state);

fig. 3 is a second schematic view of the portable projection screen device according to the present invention (the projection screen is in a rolled state);

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a side view of a portable projection screen apparatus according to the present invention;

fig. 6 is a front view of a portable projection screen apparatus according to the present invention;

FIG. 7 is a cross-sectional view A-A of FIG. 6;

fig. 8 is a schematic view of the tie rod of the present invention;

fig. 9 is a partial enlarged view at B in fig. 8;

fig. 10 is a first schematic view (natural state) of the connection between the pull rod and the roller bracket according to the present invention;

fig. 11 is a second schematic connection diagram (lifting state) of the pull rod and the roller bracket according to the present invention;

FIG. 12 is an enlarged view of a portion of FIG. 5 at C;

in the figure, 1, a projection curtain; 2. a hinged seat; 3. a hinged lever; 4. a base; 5. a half shell; 6. a curtain reel; 7. a screw rod; 8. a drive motor; 9. a nut pair; 10. pressing a plate; 11. a universal wheel support; 12. a pull rod; 13. a storage battery; 14. a roller bracket; 15. a first bearing; 16. a first gear; 17. a second bearing; 18. a second gear; 19. a spring; 20. a universal wheel; 21. an opening; 22. a roller; 23. a handle; 24. a collar; 25. limiting collision beads; 26. an inner concave limiting part; 27. a limiting port; 28. a hinged section; 29. a circular baffle plate; 30. a limiting ring; 31. a U-shaped groove; 32. and a ball transfer unit.

Detailed Description

The invention is described in detail below with reference to the drawings, as shown in fig. 1-12: the hinging seat 2 is fixed on the base 4, the hinging seat 2 is hinged with two symmetrically distributed hinging rods 3, the semi-shell 5 is positioned on the base 4 when being spliced into a whole shell, the semi-shell 5 is internally provided with a curtain scroll 6, a screw rod 7, a driving motor 8, a nut pair 9, a pressing plate 10, a universal wheel bracket 11, a pull rod 12, a storage battery 13 and a roller bracket 14, the driving motor 8 and the storage battery 13 are arranged in the semi-shell 5, two ends of the projection curtain 1 are respectively fixed on the two curtain scroll 6, the curtain scroll 6 is parallel to the screw rod 7, the lower end of the curtain scroll 6 is rotatably arranged on the lower end surface of the semi-shell 5 through a first bearing 15, the output end of the driving motor 8 is connected with the top end of the curtain scroll 6, the upper end of the curtain scroll 6 is provided with a first gear 16, the upper end and the lower end of the screw rod 7 are rotatably arranged on the upper and lower end surfaces of the semi-shell 5 through, the screw 7 is connected with a nut pair 9 in a threaded manner, the nut pair 9 is hinged with a hinge rod 3 on the opposite side of the nut pair 9, the bottom in the half shell 5 is hinged with a roller support 14 and two universal wheel supports 11 which are symmetrically distributed, the universal wheel supports 11 are also connected with the inner wall of the bottom end of the half shell 5 through springs 19, universal wheels 20 are mounted on the universal wheel supports 11, a pressing plate 10 is fixedly connected with the nut pair 9, the two universal wheel supports 11 are pressed when the pressing plate 10 descends to enable the two universal wheel supports 11 to be screwed out from openings 21 in the two side walls of the half shell 5, rollers 22 are mounted at one end of each roller support 14, one end of a pull rod 12 is positioned in the half shell 5 and movably connected with the pull rod 12, the other end of the pull rod 12 extends out of the half shell 5. A winding switch and an unwinding switch for controlling the driving motor 8 to work are arranged on the half shell 5, and the driving motor 8 is a stepping motor;

the hinged end of the roller bracket 14 and the pull rod 12 is provided with a strip-shaped limiting opening 27, the lower end of the pull rod 12 is provided with a hinged section 28 with the radius smaller than the radius of the upper end of the pull rod 12, the hinged section 28 of the pull rod 12 moves in the limiting opening 27, the tail end of the hinged section 28 of the pull rod 12 is fixed with a circular blocking piece 29 used for limiting the separation of the pull rod 12 and the limiting opening 27, the width of the limiting opening 27 is larger than the diameter of the hinged section 28 of the pull rod 12 and smaller than the diameter of the circular blocking piece 29, and the roller bracket 14 is driven to obliquely extend out of the. When the handle 23 drives the pull rod 12 to rise, the circular blocking piece 29 is abutted against the roller bracket 14, and the hinged section 28 of the pull rod 12 only moves in the limiting opening 27, so that the hinged section 28 of the pull rod 12 is prevented from being separated from the limiting opening 27.

The driving motors 8 in the two half shells 5 work simultaneously in opposite directions, and the threads of the two screw rods 7 are in opposite directions. Therefore, the projection screen 1 can be simultaneously unreeled and reeled, and the two nut pairs 9 can be simultaneously lifted and simultaneously lowered;

a limiting ring 30 is fixed on the pull rod 12, and a U-shaped groove 31 matched with the limiting ring 30 is formed at one end of the handle 23 clamped with the pull rod 12. After the two half shells 5 are spliced into a whole shell, the U-shaped groove 31 of the handle 23 can be rotated to the position for clamping the pull rod 12, and when the handle 23 is lifted, the limiting ring 30 clamps the handle 23, so that the handle 23 can drive the pull rod 12 to ascend;

four universal balls 32 are mounted on the bottom end faces of the two half shells 5, so that the half shells 5 can slide in and out of the base 4 conveniently;

both sides of the base 4 facing the two half-shells 5 are beveled, so that the two half-shells 5 can slide smoothly into and out of the base 4 from the bevels.

As shown in fig. 3-4: a lantern ring 24 is fixed at the top end of the half shell 5, the upper end of the pull rod 12 penetrates through the lantern ring 24, a threaded hole is radially tapped on the lantern ring 24, a limiting collision ball 25 is connected to the threaded hole through a thread, and an inward concave limiting part 26 matched with the limiting collision ball 25 is arranged at the upper end of the pull rod 12. When the inner concave position-limiting part 26 of the pull rod 12 is located at the position of the sleeve ring 24, the position-limiting collision bead 25 is screwed, and the position-limiting collision bead 25 is screwed to the inner concave position-limiting part 26, so that the pull rod 12 is fixed.

The working principle of the embodiment is as follows: when the projection screen 1 is used, the lifting handle 23 is firstly screwed out from the pull rod 12 clamped with the lifting handle, the two half shells 5 are not connected together, the unwinding switch is pressed, the storage battery 13 supplies power for the driving motor 8, the driving motor 8 selects a stepping motor, the driving motors 8 in the two half shells 5 work simultaneously, the driving motor 8 drives the screen scroll 6 to rotate, the screen scroll 6 unwinds the projection screen 1, the rotation directions of the two driving motors 8 are opposite, so that the projection screen 1 is unwound simultaneously, the screen scroll 6 drives the second gear 18 and the lead screw 7 to rotate through the first gear 16, the nut pair 9 converts the rotation motion of the lead screw 7 into linear motion to move downwards, the two nut pairs 9 synchronously descend, the nut pair 9 drives one end of the hinge rod 3 to descend, the two half shells 5 are supported by the two hinge rods 3 through reverse thrust, the semi-shell 5 gradually slides out of the base 4, the universal ball 32 supports the semi-shell 5 to move, the universal ball 32 is arranged to facilitate the semi-shell 5 to slide out of the base 4, abrasion of the bottom of the semi-shell 5 is avoided, and the inclined plane is arranged to assist the universal ball 32, so that the semi-shell 5 can stably slide out of the inclined plane of the base 4;

the pressing plate 10 descends along with the nut pair 9, the pressing plate 10 descends to prop the two universal wheel supports 11 apart, the natural distance between the upper ends of the two universal wheel supports 11 is larger than the size of the corresponding edge of the pressing plate 10, so that the pressing plate 10 can pass through the gap between the upper ends of the two universal wheel supports 11 and gradually contact with the two universal wheel supports 11 to prop the two universal wheel supports 11 apart synchronously, the universal wheel supports 11 and the universal wheels 20 are screwed out from the openings 21, the springs 19 are compressed under stress, when the universal wheel supports 11 are completely screwed out, the driving motor 8 stops rotating, the four universal wheels 20 jointly support the whole device, and at the moment, the projection screen 1 is also completely unreeled;

after the projection screen is used, a winding switch is pressed down, a storage battery 13 supplies power to a driving motor 8, the driving motor 8 drives a screen scroll 6 to rotate reversely, the screen scroll 6 winds the projection screen 1, a screw 7 drives a nut pair 9 and a pressing plate 10 to rise, a hinge rod 3 pulls a half shell 5 to enable the two half shells 5 to gather together and to be gradually spliced into a whole, a universal wheel support 11 is gradually screwed into the half shell 5 under the elastic restoring force of a spring 19, a universal ball 32 starts to support the half shell 5, the half shell 5 slides on a base 4 from an inclined plane through the universal ball 32, after the two half shells 5 are spliced into a whole, the driving motor 8 stops rotating, a lifting handle 23 is rotated, and a U-shaped groove 31 of the lifting handle 23 is used; when the device needs to be moved, the handle 23 is lifted, the limiting ring 30 blocks the handle 23, so that the handle 23 can drive the pull rod 12 to ascend, the hinged section 28 of the pull rod 12 moves in the limiting opening 27, the round blocking piece 29 can abut against the roller support 14, the hinged section 28 of the pull rod 12 is prevented from being separated from the limiting opening 27, the pull rod 12 drives one end of the roller support 14 to be screwed up, one end, connected with the roller 22, of the roller support 14 is screwed out from the opening 21, the roller 22 is screwed out and has a certain inclination angle, the concave limiting part 26 of the pull rod 12 is located at the lantern ring 24, then the limiting collision bead 25 is screwed up, the limiting collision bead 25 is screwed to the concave limiting part 26, the pull rod 12 is fixed, the handle 23 is pulled obliquely, and the whole device can be moved.

Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.

Claims

1. A portable projection screen device comprises a projection screen (1), an articulated seat (2), articulated rods (3), a base (4) and two semi-shells (5) which are symmetrically distributed, wherein the articulated seat (2) is fixed on the base (4), the articulated seat (2) is articulated with the articulated rods (3) which are symmetrically distributed, and the two semi-shells (5) can be spliced into a whole shell, which is characterized in that screen reels (6), lead screws (7), driving motors (8), nut pairs (9), a pressing plate (10), universal wheel supports (11), pull rods (12), a storage battery (13) and roller supports (14) are arranged in the two semi-shells (5), two ends of the projection screen (1) are respectively fixed on the two screen reels (6), the screen reels (6) are parallel to the lead screws (7), the lower ends of the screen reels (6) are rotatably installed on the lower end faces of the semi-shells (5) through first bearings (15), the utility model discloses a novel curtain roller, including drive motor (8), curtain spool (6), first gear (16) are installed to drive motor (8) output and curtain spool (6) top, both ends are rotatable through two second bearings (17) and are installed on half casing (5) upper and lower both ends face about lead screw (7), second gear (18) of being connected with first gear (16) meshing are installed to lead screw (7) upper end, threaded connection has nut pair (9) on lead screw (7), nut pair (9) are articulated rather than hinge bar (3) of inclining in opposite directions, bottom articulates there are gyro wheel support (14) and two symmetric distribution's universal wheel support (11) in half casing (5), universal wheel support (11) still are connected through spring (19) with half casing (5) bottom inner wall, install universal wheel (20) on universal wheel support (11), clamp plate (10) and nut pair (9) fixed connection, the utility model discloses a semi-shell structure, including clamp plate (10), clamp plate (10) descend and push down two universal wheel supports (11) and make it revolve out by opening (21) of half shell (5) both sides wall, gyro wheel (22) are installed to gyro wheel support (14) one end, pull rod (12) one end is located half shell (5) and stretches out half shell (5) with pull rod (12) swing joint, the other end, and one of them pull rod (12) are articulated with handle (23), handle (23) can with another pull rod (12) joint after two half shells (5) splice are a whole shell.

2. The portable projection screen device as claimed in claim 1, wherein a collar (24) is fixed to the top end of the half shell (5), the collar (24) is inserted through the upper end of the pull rod (12), a threaded hole is radially tapped on the collar (24), a limit collision ball (25) is screwed in the threaded hole, and an inward concave limit part (26) matched with the limit collision ball (25) is arranged at the upper end of the pull rod (12).

3. The portable projection curtain device as claimed in claim 1, wherein the roller bracket (14) is hinged to the pull rod (12) and has an elongated limiting opening (27) at one end, the lower end of the pull rod (12) is a hinged section (28) with a radius smaller than that of the upper end of the pull rod, the hinged section (28) of the pull rod (12) moves in the limiting opening (27), a circular blocking piece (29) for limiting the separation of the pull rod (12) from the limiting opening (27) is fixed at the end of the hinged section (28) of the pull rod (12), the width of the limiting opening (27) is larger than the diameter of the hinged section (28) of the pull rod (12) and smaller than the diameter of the circular blocking piece (29), and the roller bracket (14) is driven to obliquely extend out of the opening (21) when the pull rod (12) is lifted.

4. A portable projection screen apparatus as claimed in claim 1, wherein the drive motors (8) in the two half shells (5) are operated simultaneously in opposite directions, and the screw threads of the two screw rods (7) are in opposite directions.

5. The portable projection screen device as claimed in claim 1, wherein a limiting ring (30) is fixed on the pull rod (12), and a U-shaped groove (31) matched with the limiting ring (30) is formed at one end of the handle (23) clamped with the pull rod (12).

6. A portable projection screen apparatus as claimed in claim 1, wherein four ball transfer units (32) are mounted on the bottom end faces of the two half shells (5).

7. A portable projection screen apparatus as claimed in claim 1, wherein the base (4) is beveled on both sides facing the two half shells (5).