CN210534527U - Projection screen device - Google Patents

Abstract

The utility model provides a projection screen device relates to projection technology application for solve between projection screen and the projector apart from adjusting inconvenient problem. The utility model discloses a projection screen device, including projection screen and adjusting part, the adjusting part includes the drive assembly, the drive assembly includes power shaft, reel, the reel cover is in on the power shaft; the adjusting assembly further comprises a fixed pulley, and the fixed pulley is arranged above the driving assembly; one end of the lifting rope is wound on the winding wheel, and the other end of the lifting rope is wound on the fixed pulley and acts on the sliding block; the sliding block is connected with the lifting rope and is fixedly connected with the projection screen through the screen adapter plate. The technical scheme can realize stepless two-way adjustment of the upper position and the lower position of the projection screen, has a large adjustment range, can realize hovering self-locking of the projection screen at any position, is simple and convenient, can be operated by one person, and has a friendly operation mode.

Description

Projection screen device

Technical Field

The utility model relates to a projection technique application especially relates to a projection screen device.

Background

In projection display technology, the distance between a projection screen and a projector directly influences the display effect of a screen image, and the reasonable adjustment of the relative position between the projection screen and the projector is a key problem in the projection technology.

Fig. 1 is a schematic structural diagram of a conventional projection screen position adjustment apparatus. As shown in fig. 1, the whole adjusting device is supported on the base by the vertical beam, the middle lower section of the vertical beam is connected with a projector fixing platform for placing a projector, a series of through holes are formed in the upper end of the vertical beam, a certain distance is formed between every two adjacent through holes, a switching cross beam is fixed on the through holes at a proper height, the other side of the switching cross beam is connected with the projection screen, when the height of the projection screen needs to be adjusted, the switching cross beam and the display screen need to be taken down firstly, the vertical beam is moved upwards or downwards relatively to a plurality of hole sites, and then the vertical beam is fixed by screws.

However, the position of the projection screen can only be adjusted in a span mode at a specific interval, the adjustment range is small, the screen needs to be detached and the switching cross beam and the vertical beam are fixed through the screws again in each adjustment, too much manpower is consumed, the adjustment is inconvenient, and the operation mode is not friendly.

Disclosure of Invention

The utility model provides a projection screen device for the position relation between projection screen and the projector is adjusted, can realize stepless two-way convenient adjustable, and the optional position auto-lock that hovers.

The utility model provides a pair of projection screen device, include: a projection screen, an adjustment assembly, and a packaging assembly;

the adjusting component comprises a driving component, the driving component is the core of the mechanism and used for driving and controlling the lifting and hovering self-locking of the projection screen, and the packaging component is externally used for connecting the projection screen and placing the projector.

The adjusting assembly comprises a driving assembly, a fixed pulley, a lifting rope, a sliding block, a guide groove and a screen adapter plate;

the driving assembly comprises a fixed base plate, a fixed shaft, a ratchet wheel, a torsion spring, a magnet, a power shaft, a power key, a reel, a bearing and a driving assembly cover plate;

one side of the fixed substrate is connected with the packaging component shell, namely the accommodating three-dimensional column, and one side of the fixed substrate is used for stabilizing the fixed shaft;

the fixing shaft is made of POM materials, has good wear resistance and is beneficial to self-sliding adjustment, a flange is arranged on one side opposite to the fixing base plate, and a groove is formed in the side part of the flange and used for placing the magnet;

the ratchet wheel is arranged on the radial outer side of the flange of the fixed shaft, a one-way gear is arranged on the inner side of the flange of the fixed shaft, the magnet is adsorbed on the gear on the inner side of the ratchet wheel, and the magnet interacts with the gear to generate a prompt sound when the ratchet wheel rotates clockwise and blocks the rotation of the ratchet wheel when the ratchet wheel has a tendency of rotating anticlockwise;

the torsion spring is sleeved on the radial outer side of the ratchet wheel, two ears are arranged on the side part of the torsion spring, the power shaft and the reel interact with one or two of the ears of the torsion spring, and external force acts on the ratchet wheel through axial stretching or radial stretching of the torsion spring;

one end of the power shaft is hollow and cylindrical, the power shaft is sleeved outside the torsion spring, an opening is formed in the side part of the power shaft, flanges are formed on the edge of the opening, the flanges on the two sides of the opening are close to the two ears of the torsion spring, and a notch is formed in the other end of the power shaft and used for inserting a power key;

the reel is sleeved on the power shaft, one end of the reel along the axial direction is provided with a flange, and the flange is stopped at an opening of the hollow cylinder end of the power shaft, is stopped at the outer side of the torsion spring and is on the same motion track with the ears of the torsion spring;

the bearing is sleeved on the power shaft, abuts against the reel and is positioned on the other side of the flange of the reel in the axial direction;

the driving assembly cover plate is of a barrel-shaped structure, the upper part of the driving assembly cover plate is provided with a hole extending out of one end of the gap of the power shaft, the bottom of the driving assembly cover plate is annular and is connected with the fixed shaft, and the driving assembly cover plate and the fixed base plate package the driving assembly into a whole;

the fixed pulley is arranged above the driving assembly, is fixed at the top of the accommodating three-dimensional column of the packaging assembly and is used for transferring the movement of the driving assembly acting on the sliding block;

one end of the lifting rope is connected with a winding wheel in the driving assembly in a winding way, and the other end of the lifting rope is fixedly connected with the sliding block by winding around the fixed pulley and drives the sliding block to move up and down according to the driving assembly;

the top of the sliding block is fixedly connected with a lifting rope, the side part of the sliding block is connected with a screen adapter plate, and the sliding block can lift in a certain movement range in the guide groove;

the guide groove is fixed in the packaging assembly and provides a guide movement range for the sliding block;

the screen adapter plate is used for adapting the projection screen, is connected to the side part of the sliding block, moves together with the sliding block and drives the projection screen to lift according to the movement of the sliding block;

the packaging assembly comprises a containing stereoscopic column, a graduated scale, a projector fixing flat plate and a base;

the accommodating three-dimensional column is hollow, the middle of the accommodating three-dimensional column is divided into two spaces, the first space is used for accommodating the guide groove, the second space is used for accommodating the driving assembly and the fixed pulley, the fixed pulley is positioned at the top of the second space, the middle of the second space is used for accommodating the driving assembly, and a small hole is formed in the side part of the accommodating three-dimensional column and used for inserting the power key;

the graduated scale is arranged outside the accommodating three-dimensional column or directly engraved on the accommodating three-dimensional column to provide a reference scale for the lifting of the screen;

the projector fixing flat plate is perpendicular to the accommodating three-dimensional column, is arranged on the same side of the outside of the accommodating three-dimensional column as the screen and is used for placing a projector;

the base is fixedly connected with the accommodating three-dimensional column and is positioned at the bottom of the accommodating three-dimensional column for stabilizing the projection screen device.

The utility model provides a projection screen device, this projection screen device includes projection screen, adjusting part and encapsulation subassembly, wherein, adjusting part is the core, under the effect of external force, drive assembly among the adjusting part passes through the relative position relation between lifting rope control projection screen and the projector, stepless two-way regulation can be realized to this regulative mode, the control range scope is big, and accessible self-locking function hovers the auto-lock in the optional position, for the mode of dismantling the machine removal regulation on the existing market, this adjustment mechanism letter folk prescription single alright operation, the operation is more friendly.

Drawings

In order to illustrate the embodiments of the present invention or the solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic diagram of a conventional projection screen apparatus;

fig. 2 is an overall exploded view of a projection screen device according to an embodiment of the present invention;

fig. 3 is an exploded view of a drive assembly in an embodiment of the invention;

fig. 4 is a schematic structural diagram of an adjusting assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a package assembly according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of the driving assembly during operation when the power shaft rotates clockwise according to the embodiment of the present invention;

FIG. 7 is a cross-sectional view of the driving assembly when the power shaft rotates clockwise to raise the screen according to the embodiment of the present invention;

FIG. 8 is a sectional view of the driving assembly when the power shaft rotates clockwise to cancel the hovering of the screen;

fig. 9 is a schematic structural view of the driving assembly during operation when the power shaft rotates counterclockwise in the embodiment of the present invention.

Reference numerals:

01-base 02-projector fixing flat plate 03-vertical beam

04-Beam 05-Via 06-projection Screen

1-adjusting assembly 11-drive assembly 110-power key

111-Power shaft 1111-Power shaft notch 1112-Power shaft Flange

112-reel 1121-reel flange 113-torsion spring

1131-torsion spring ear 1132-torsion spring ear 114-ratchet

115-stationary shaft 1151-stationary shaft groove 116-magnet

117-fixed base plate 118-bearing 119-drive assembly cover plate

12-fixed pulley 13-lifting rope 14-sliding block

15-guide groove 16-screen adapter plate

2-packaging assembly 21-accommodating solid column 22-graduated scale

23-projector fixed flat plate 24-base

3-projection screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without any creative work belong to the protection scope of the present invention.

The utility model discloses projection screen device for adjust the position relation between projection screen and the projector, solve and adjust inconvenient, the inflexible technical problem of operating mode among the current projection screen device, below, it is right through concrete embodiment the utility model discloses a technical scheme carries out the detailed description.

An embodiment of the utility model provides a projection screen device, as shown in fig. 2, this projection screen device includes:

the adjusting assembly 1 comprises a driving assembly 11, a fixed pulley 12, a lifting rope 13, a sliding block 14, a guide groove 15 and a screen adapter plate 16;

the driving assembly 11 comprises a power key 110, a power shaft 111, a reel 112, a torsion spring 113, a ratchet 114, a fixed shaft 115, a magnet 116, a fixed base plate 117, a bearing 118 and a driving assembly cover plate 119;

the projection screen device further comprises a packaging component 2, wherein the packaging component 2 comprises a stereoscopic column 21, a graduated scale 22, a projector fixing flat plate 23 and a base 24;

the projection screen arrangement further comprises a projection screen 3.

In the projection screen device of the present embodiment, the driving unit 11 is a core component of the device, and is used for driving and controlling the projection screen 3 to ascend and descend, and realizing a self-locking function in hovering.

Fig. 3 shows an exploded view of the driving assembly 11 in the projection screen device, wherein a hexagonal notch 1111 is formed at one end of the power shaft 111 for inserting the power key 110, and a flange 1112 is formed at one end for pushing the torsion spring 113; the reel 112 is provided at one end with a flange 1121 for interacting with a torsion spring 113; the torsion spring 113 is axially positioned between the end surface of the ratchet 114 and the end surface of the power shaft 111, two ears are arranged on the side part of the torsion spring, the power shaft 111 interacts with the torsion spring ears 1131 and 1132, the reel 112 interacts with the torsion spring ears 1132, and external force acts on the ratchet 114 through axial stretching or radial stretching of the torsion spring 113; the inner side of the ratchet wheel 114 is provided with a directional gear for clockwise rotation and self-locking during suspension; the fixed shaft 115 is provided with a flange, and the side part of the flange is provided with a groove 1151 for placing the magnet 116; the magnet 116 is placed in a groove 1151 on the side part of the flange of the fixed shaft and adsorbed on the gear, the ratchet wheel 114 interacts with the gear to generate a prompt sound when rotating clockwise, and the ratchet wheel 114 is blocked from rotating when having a tendency of rotating anticlockwise; one side of the fixed substrate 117 is used for stabilizing the fixed shaft 115, and the other side is connected with the packaging component shell, namely the accommodating three-dimensional column 21; the bearing 118 is fitted over the power shaft 111, abuts against the reel 112, and is located on the other side of the reel flange 1121; the drive assembly cover 119 is a barrel-shaped structure with a hole in the top that extends beyond the end of the power shaft notch 1111 and a circular bottom that is attached to the stationary shaft 115.

Fig. 4 shows a schematic structural diagram of the adjustment assembly 1 in the projection screen apparatus, wherein the fixed pulley 12 is fixed on the top of the accommodating solid column 21 of the packaging assembly 2 for transferring the movement of the driving assembly 11 acting on the sliding block 14; one end of the lifting rope 13 is connected with the driving component 11, and the other end of the lifting rope bypasses the fixed pulley 12 to be connected with the sliding block 14, and drives the sliding block 14 to move up and down according to the driving component 11; the upper part of the sliding block 14 is connected with a lifting rope 13, the side part is connected with a screen adapter plate 16, and the sliding block can lift in a certain movement range in the guide groove 15; the guide slot 15 is fixed on the base 24 of the packaging component 2, is positioned in a first space for accommodating the stereoscopic column 21 and provides a guide movement range for the sliding block 14; the screen adapter plate 16 is used for adapting the projection screen 3, is connected to the side of the slide block 14, moves together with the slide block 14, and drives the projection screen 3 to lift according to the movement of the slide block 14.

The structure of the packaging assembly 2 in the projection screen device is schematically shown in fig. 5, the middle of the accommodating stereoscopic column 21 is hollow, the top of the accommodating stereoscopic column covers the fixed pulley 12, the middle of the accommodating stereoscopic column is divided into two spaces, the first space close to the projection screen is provided with the guide groove 15, the second space is provided with the driving assembly 11, the side part of the driving assembly is provided with a small hole for inserting the power key 110, and the bottom of the driving assembly is connected with the base 24 to form an integrated structure; the graduated scale 22 provides a reference scale for the lifting of the screen, is vertically arranged on the side part of the accommodating stereoscopic column 21 or is directly carved on the accommodating stereoscopic column 21, has the length between the top part of the accommodating stereoscopic column 21 and the fixed flat plate 23 of the projector, and is positioned on the same side with the socket of the power key 110; the projector fixing flat plate 23 is perpendicular to the accommodating stereoscopic column 21, is arranged on the same side of the outside of the accommodating stereoscopic column 21 as the projection screen 3, and is used for placing a projector; the base 24 is fixedly connected to the stereoscopic column 21 and located at the bottom of the stereoscopic column 21 for stabilizing the projection screen device.

Specifically, when the screen needs to be raised, as shown in fig. 6 and 7, the power key 110 is inserted into the hexagonal notch 1111 of the power shaft 111, a clockwise rotation force is applied, an external force drives the power shaft 111 to rotate clockwise, the power shaft flange 1112 pushes the torsion spring ear 1131 clockwise, so that the torsion spring 113 is relaxed, the axial length is increased, one end of the torsion spring 113 near the side wall of the ratchet 114 is pressed against the ratchet 114 in the axial direction, the friction force between the torsion spring 113 and the ratchet 114 drives the ratchet to rotate clockwise together, the magnet 116 is attached to the gear of the ratchet 114 within the range of the fixed shaft groove 1151 and engaged between the teeth of the ratchet 114, the gear direction on the ratchet 114 can ensure that the ratchet 114 rotates clockwise smoothly, the magnet 116 slides on the gear back along with the rotation of the ratchet 114 and generates a click sound, and the power shaft flange 1112 pushes the torsion spring ear 1131 to the reel flange 1121, the reel flange 1121 is just clamped on the torsion spring ear 1131, the torsion spring 113 is stressed to clockwise drive the reel 112 to rotate, the lifting rope 13 is clockwise wound on the reel 112, and the sliding block 14 is lifted through the fixed pulley to drive the screen adapter plate 16 to realize screen lifting.

Specifically, when the screen rises to a certain height and needs to be suspended, as shown in fig. 8, the external force acting on the power key 110 disappears, the clockwise power on the power shaft 111 disappears, the power shaft 111 remains stationary, at this time, the gravity of the screen, the screen adapter plate 16 and the slider 14 is transmitted to the reel 112 through the lifting rope 13, the reel 112 is forced to rotate counterclockwise, at this time, the reel flange 1121 is clamped on the torsion spring ear 1131, the flange 1121 thereof drives the torsion spring 113 to twist counterclockwise, at this time, the torsion spring 113 contracts in the radial dimension, tightly hoops the outer wall of the ratchet 114, the counterclockwise rotation trend is transmitted to the ratchet 114, at this time, the acting force between the reverse tooth on the ratchet 114 and the magnet 116 and the fixed shaft groove 1151 in the counterclockwise direction is in a self-locking state, the self-locking force of the ratchet 114 is much greater than the gravity of the screen, the torsion spring 113 and the reel 112 are also kept stationary, and the entire drive assembly is in a self-locking state, so that the screen adapter plate 16 and the slider 14 are kept stationary and the screen hovers in a self-locking state.

Specifically, when the screen needs to be lowered, as shown in fig. 9, the power key 110 is inserted into the hexagonal notch 1111 of the power shaft 111, a counterclockwise rotating force is applied, an external force drives the power shaft 111 to rotate counterclockwise, the power shaft flange 1112 pushes the torsion spring ear 1132 counterclockwise, the torsion spring 113 slightly expands in the radial direction, the friction force between the torsion spring 113 and the ratchet 114 is reduced, due to the tendency that the gravity of the screen portion acts on the reel 112 to rotate counterclockwise, the reel flange 1121 abuts against the torsion spring ear 1131, when the sum of the gravity and the external force of the screen, the screen adapter plate 16 and the slider 14 is greater than the friction force between the torsion spring 113 and the ratchet 114, the counterclockwise relative rotation occurs between the torsion spring 113 and the ratchet 114, that is, the torsion spring 113 rotates counterclockwise along with the whole power shaft 111, the reel 112 abutting against the torsion spring ear 1131 also rotates counterclockwise, and the lifting cord 13 is disengaged from, the sliding block 14 connected with the screen adapter plate 16 is put down by bypassing the fixed pulley 12, so that the screen is lowered, and in the process, the reverse teeth on the ratchet wheel 114 and the space between the magnet 116 and the fixed shaft groove 1151 in the counterclockwise direction are in a self-locking state and keep still.

Specifically, when the screen is lowered to a certain height and needs to be suspended, the situation is similar to the situation that the screen is raised to a certain height and needs to be suspended, as shown in fig. 8, the external force acting on the power key 110 disappears, the counterclockwise power on the power shaft 111 disappears, the power shaft 111 remains stationary, at this time, the gravity of the screen, the screen adapter plate 16 and the slider 14 is transmitted to the reel 112 through the lifting rope 13, the reel 112 is forced to rotate counterclockwise, at this time, the reel flange 1121 is clamped on the torsion spring ear 1131, the flange 1121 thereof drives the torsion spring 113 to twist counterclockwise, the torsion spring 113 contracts in the radial dimension, tightly hoops the outer wall of the ratchet 114, the counterclockwise rotation tendency is transmitted to the ratchet 114, the reverse teeth on the ratchet 114 are in a self-locking state with the acting force between the magnet 116 and the fixed shaft 1151 in the counterclockwise direction, and the self-locking force of the ratchet 114, the ratchet 114 remains stationary, the torsion spring 113 and the reel 112 remain stationary, and the entire drive assembly is in a self-locking state, so that the screen adapter plate 16 and the sliders 14 remain stationary and the screen hovers in a self-locking state.

More specifically, with the adjusting assembly 1, when the power shaft 111 rotates clockwise, the lifting rope 13 is wound on the winding reel 112, the lifting rope 13 lifts the slider 14 through the fixed pulley 12, the slider 14 rises in the guide groove 15, and the screen adapter plate 16 is driven to lift the screen.

More specifically, with the adjusting assembly 1, the lift cord 13 is released from the reel 112 when the power shaft 111 rotates counterclockwise, the lift cord 13 releases the slider 14 through the fixed pulley 12, and the slider 14 descends in the guide groove 15, achieving screen descent together with the screen adapter plate 16.

More specifically, for the packaging assembly 2, which is used for connection with an external screen and a projector and overall arrangement of the placement position, the graduated scale 22 is arranged between the screen adapter plate 16 and the fixed flat plate 23 of the projector, so that the position relationship between the two can be visually and efficiently predicted, and the adjustment is visually and efficiently performed.

Finally, it should be noted that the above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that: it is to be understood that modifications may be made to the technical solutions described in the above embodiments, or equivalents may be substituted for a part or all of the technical features, and such modifications or substitutions do not depart from the scope of the embodiments of the present invention.

Claims (10)

1. A projection screen apparatus, comprising: a projection screen and an adjustment assembly, the adjustment assembly comprising:

the driving assembly comprises a power shaft and a reel, and the reel is sleeved on the power shaft;

a fixed pulley disposed above the drive assembly;

one end of the lifting rope is wound on the winding wheel, and the other end of the lifting rope is wound on the fixed pulley and acts on the sliding block;

the sliding block is connected with the lifting rope and is fixedly connected with the projection screen through the screen adapter plate;

the power shaft is used for driving the reel, the reel can release or wind the lifting rope when rotating, and the sliding block can drive the projection screen to realize lifting under the driving of the lifting rope.

2. The projection screen apparatus of claim 1, wherein the drive assembly further comprises a fixed shaft, a ratchet, a magnet, a torsion spring, and a power key.

3. A projection screen apparatus according to claim 2, wherein said drive assembly, wherein:

a flange is arranged on one side of the fixed shaft, and a groove is formed in the side part of the flange and used for placing the magnet;

the ratchet wheel is arranged on the radial outer side of the flange of the fixed shaft, a one-way gear is arranged on the inner side of the flange of the fixed shaft, and the magnet is adsorbed on the gear on the inner side of the ratchet wheel and used for preventing the ratchet wheel from reversely rotating;

the torsion spring is sleeved on the radial outer side of the ratchet wheel, and two torsion spring ears are arranged on the radial outer side of the torsion spring.

4. A projection screen apparatus according to claim 1, wherein the drive assembly, wherein:

one end of the power shaft is arranged in a hollow cylinder shape, the power shaft is sleeved on the outer side of the torsion spring, an opening is formed in the side part of the power shaft, a flange is formed at the edge of the opening and used for pushing ears of the torsion spring, and a notch is formed in the other end of the power shaft and used for inserting the power key according to claim 2;

the reel is provided with a flange along the axial direction, and the flange is positioned at an opening of the hollow cylinder end of the power shaft and positioned outside the torsion spring.

5. A projection screen assembly as recited in claim 1, wherein the screen adapter plate is coupled to the slider on one side and to the projection screen on an opposite side.

6. The projection screen apparatus of claim 1 wherein the adjustment assembly further comprises a guide slot for providing a range of motion for the slider.

7. The projection screen device of claim 1, further comprising a packaging component, wherein the packaging component comprises a receiving three-dimensional column, the receiving three-dimensional column is hollow, the middle of the receiving three-dimensional column is divided into two spaces, the first space is used for placing the guide groove, the second space is used for placing the driving component and the fixed pulley, the fixed pulley is located at the top of the second space, the middle of the second space is used for placing the driving component, and a small hole is formed in the side portion of the receiving three-dimensional column for inserting the power key.

8. The projection screen apparatus of claim 7, wherein the packaging assembly further comprises a scale, the scale is disposed outside the receiving solid column or directly engraved on the receiving solid column.

9. The projection screen apparatus of claim 7, wherein the enclosure assembly further comprises a projector mount plate, the projector mount plate being perpendicular to the receiving stud and disposed on the same side of the receiving stud as the screen.

10. The projection screen apparatus of claim 7, wherein the packaging assembly further comprises a base, the base is fixedly connected to the receiving three-dimensional column and is located at the bottom of the receiving three-dimensional column for providing stability.

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