Photosensitive regulation and control device of projection screen cloth

Abstract

The utility model relates to a photosensitive regulation and control device of projection screen cloth. Comprising a driving assembly, the driving assembly comprises a transmission rail and a transmission block, the transmission rail is vertically arranged and connected to a fixed seat, the transmission block is movably connected to the transmission rail, a photosensitive regulation and control assembly comprises an extension frame, a first photosensitive head and a second photosensitive head, one end of the extension frame is detachably connected to the transmission block, the first photosensitive head is arranged on the transmission block, and the second photosensitive head is arranged on the transmission block. The other end of the extension frame is connected with a second photosensitive head, the upper end of the curtain is connected to the fixing seat, and the lower end of the curtain is connected to the extension frame. According to the utility model, the upper end of the curtain is connected to the fixed seat, the lower end of the curtain is connected to the extension frame, the first light sensing head on the movable block and the second light sensing head at the end part of the extension frame can start the motor to drive the movable head to descend when the projector is started and irradiates the first light sensing head, so that the curtain is unfolded; after the projector is turned off, the movable head automatically ascends to wind the curtain, and the effect of adjusting the curtain through light sensing is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photosensitivity control, and in particular relates to a photosensitivity control device for a projection screen cloth. Background Art

[0002] At present, when companies hold meetings, they often need to use projectors. By projecting information on the computer onto the screen, a larger and clearer display effect can be achieved. Since the screen is only lowered when it is needed to allow the projector to project images, and the meeting time only occupies a small part of the meeting room time, leaving the screen unfolded may cause the screen to turn yellow after being hung for a long time, affecting the projection effect. However, if the screen is rolled up when not in use, then when the projector is turned on, the screen needs to be opened in a hurry, affecting the efficiency of the meeting. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a photosensitivity control device for a projection screen curtain, by connecting the upper end of the curtain to a fixed seat, and the lower end of the curtain to an extension frame, a first photosensitive head on the movable block and a second photosensitive head on the end of the extension frame can start a motor to drive the movable head to descend when the projector is turned on and irradiates the first photosensitive head, so as to unfold the curtain, and after turning off the projector, the movable head automatically rises to roll up the curtain, thereby achieving the effect of photosensitivity control of the curtain.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A photosensitive control device for a projection screen cloth, which is used to control the lifting and lowering of the screen cloth, comprises a fixed seat, a driving assembly and a photosensitive control assembly, wherein the driving assembly comprises a transmission rail, a transmission block, two groups of support seats, a screw rod and a motor, wherein the transmission rail is vertically arranged and connected to the fixed seat, and the transmission block can be movably connected to the transmission rail; the two groups of support seats are respectively arranged on the upper and lower end surfaces of the transmission rail, and the upper and lower ends of the screw rod are respectively connected to the two groups of support seats through bearings, the motor is arranged on the fixed seat, and the output end of the motor is connected to the upper end of the screw rod, and the transmission block is provided with a screw hole, which is meshed with the external thread on the screw rod; a limit groove is provided on the transmission rail, and a limit column is provided on the transmission block, and the limit column cooperates with the limit groove.

[0006] The photosensitive control component comprises an extension frame, a first photosensitive head, a second photosensitive head, an adjustment plate and a fixed block, wherein one end of the extension frame is detachably connected to the transmission block, the first photosensitive head is arranged on the transmission block, the other end of the extension frame is connected to the second photosensitive head, the upper end of the curtain is connected to the fixed seat, and the lower end of the curtain is connected to the extension frame; a through hole is provided on one end of the extension frame, a threaded hole is provided on the transmission block, and the through hole matches with the threaded hole; a C-shaped groove is provided on the other end of the extension frame, the adjustment plate matches in the C-shaped groove, the fixed block is detachably connected to the adjustment plate, the fixed groove on the fixed block matches with the curtain, and the second photosensitive head is arranged on the fixed block; a threaded locking hole is provided on the fixed block, the threaded locking hole is communicated with the fixed groove, the threaded locking hole matches with a screw, and the end of the screw abuts against the curtain in the fixed groove; the photosensitive control component comprises two groups, the two groups of photosensitive control components are distributed left and right with the transmission block as the symmetrical center, and the two groups of fixed grooves are respectively abutted with the left and right ends of the curtain.

[0007] The photosensitive control device of the projection screen cloth adopts this structure, and the setting function of the fixing seat is to fasten it to the wall. The fixing seat is provided with a plurality of holes for fixing, and the fixing seat can be fixed by screws or expansion screws. Therefore, the upper end of the screen is fixed on the fixing seat to fix the screen. In order to realize the rolling of the screen, a structure that can be lifted up and down is required. Therefore, a vertically placed transmission rail is provided on the fixing seat, and support seats are provided on the upper and lower end surfaces of the transmission rail. The upper and lower ends of the screw rod are connected to the upper and lower groups of support seats through bearings, and the motor output end on the fixing seat is connected to the screw rod, so starting the motor can drive the screw rod to rotate, and the transmission block is provided with screw holes that penetrate up and down, and the screw holes are meshed with the external threads on the screw rod, and the transmission rail is provided with a limit groove, and the transmission block is provided with a There is a limit column that cooperates with the limit groove. Therefore, in the process of driving the lead screw to rotate, the spiral pair transmission principle is used to convert the rotational motion of the motor into the linear motion of the transmission block on the lead screw to realize the up and down translation of the transmission block, and the threaded hole on the transmission block cooperates with the through hole on one end of the extension frame. The extension frame can be locked on the transmission block by screws, and the C-shaped groove on the other end of the extension frame is matched with an adjustment plate. The fixing groove on the fixed block detachably connected to the adjustment plate is used to connect the lower end of the curtain, and the screw is locked into the threaded lock hole on the fixed block, and the end of the screw is abutted against the curtain for fixing. Therefore, after the motor drives the lead screw to rotate, causing the transmission block to translate downward, it will drive the adjustment plate on the extension frame to drive the fixed block to clamp the lower end of the curtain and move downward, so that the curtain can be raised and lowered under the drive of the motor.

[0008] In order to realize the automatic raising and lowering of the screen when the projector is turned on and projected on the wall, a first photosensitive head is set on the transmission block and a second photosensitive head is set on the fixed block. In the daily environment of the conference room, the lights are either turned off or on. No matter which state is in, the amount of light in the light-off state and the light-on state is close. Therefore, the light source information that the first photosensitive head and the second photosensitive head can receive is consistent. At this time, the screen is not raised or lowered by default because it is not in the use environment of the projector. When the projector is turned on, the light projected by the projector will shine on the wall to form a rectangular highlight display area. Since the transmission block is located at the lower end of the screen in the reeled state, the highlight display area will first be projected onto the first photosensitive head on the transmission block, and the second photosensitive head on the fixed block is located above the screen. Outside the edge of the cloth, the highlighted display area will not be able to illuminate the second photosensitive head. When the conference lights are still on, the light source information obtained by the first photosensitive head and the second photosensitive head will not be much different, and the curtain will not be lowered; when the lights in the conference room are off, the light source information obtained by the first photosensitive head and the second photosensitive head will be very different. At this time, it can be considered that the projector has been turned on and the lights have been turned off to prepare for the meeting, so the motor is started to lower and unfold the rolled-up curtain until the first photosensitive head is out of the highlighted display area, so that the first photosensitive head and the second photosensitive head are both in the dark area with the same light source information, and the curtain is kept in the unfolded state until the lights are turned on, which changes the light source information received by the first photosensitive head and the second photosensitive head, and then the curtain is rolled up, thereby completing the effect of controlling the lifting and lowering of the projection screen curtain through photosensitivity.

[0009] Due to the different sizes of screens, if only one end of the screen is clamped by a set of fixing blocks, it will not have much impact if the screen is small. If the screen is large, one end of the screen will be tightened, but the other end will be loose, which greatly reduces the projection effect. Therefore, two sets of photosensitive control components are set up to symmetrically clamp the left and right ends of the lower end of the screen and lift it up and down at the same time. On the one hand, the whole screen can be tightened to ensure a good projection effect. On the other hand, the lifting process will be smoother. At the same time, in order to adapt to the different sizes of screens, the cooperation of the C-shaped groove and the adjustment plate can extend and retract the adjustment plate horizontally, so that it is suitable for screens of different lengths.

[0010] Furthermore, the fixing seat is provided with a hook, and the upper end of the curtain is detachably connected to the hook.

[0011] Compared with the prior art, the utility model has the advantages that the rotational motion of the motor can be converted into the linear motion of the transmission block on the screw by driving the motor to rotate, thereby realizing the up and down translation of the transmission block, thereby driving the adjustment plate on the extension frame to drive the fixed block to clamp the lower end of the curtain and move downward, so that the curtain can be raised and lowered under the drive of the motor. In order to ensure the smooth up and down lifting of the curtain, two groups of photosensitive control components are set to clamp the left and right ends of the lower end of the curtain for smooth lifting. At the same time, through the linkage of the first photosensitive head and the second photosensitive head, the lifting effect of the projection screen curtain can be controlled by photosensitive means. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a three-dimensional diagram of the utility model;

[0014] Figure 2 A three-dimensional diagram of the hidden curtain of the utility model;

[0015] Figure 3 For the utility model Figure 2 A local enlarged view of point A;

[0016] Figure 4 For the utility model Figure 2 A partial enlarged view of point B;

[0017] Figure 5 For the utility model Figure 2 A partial enlarged view of point C;

[0018] Figure 6 This is a front view of the hidden curtain of the utility model;

[0019] Figure 7 For the utility model Figure 6 DD cross-sectional view;

[0020] Figure 8 It is a partial explosion schematic diagram of the utility model;

[0021] Fig. 9 For the utility model Figure 8 A partial enlarged view of point E.

[0022] Among them: 1. Fixed seat; 11. Hook; 2. Driving assembly; 21. Transmission rail; 211. Limiting groove; 22. Transmission block; 221. Screw hole; 222. Limiting column; 223. Threaded hole; 23. Support seat; 24. Screw rod; 241. External thread; 25. Motor; 3. Photosensitive control assembly; 31. Extension frame; 311. Through hole; 312. C-shaped groove; 32. First photosensitive head; 33. Second photosensitive head; 34. Adjustment plate; 35. Fixed block; 351. Fixed groove; 352. Threaded lock hole; 353. Screw; 4. Curtain. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0024] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:

[0025] like Figure 1-9 As shown, a photosensitive control device for a projection screen cloth, the device is used to control the lifting of the screen cloth 4, including a fixed seat 1, a driving assembly 2 and a photosensitive control assembly 3, the driving assembly 2 includes a transmission rail 21, a transmission block 22, two groups of support seats 23, a screw rod 24 and a motor 25, the transmission rail 21 is vertically arranged and connected to the fixed seat 1, the transmission block 22 can be movably connected to the transmission rail 21; the two groups of support seats 23 are respectively arranged on the upper and lower end surfaces of the transmission rail 21, the upper and lower ends of the screw rod 24 are respectively connected to the two groups of support seats 23 through bearings, the motor 25 is arranged on the fixed seat 1, the output end of the motor 25 is connected to the upper end of the screw rod 24, the transmission block 22 is provided with a screw hole 221, and the screw hole 221 is meshed with the external thread 241 on the screw rod 24; the transmission rail 21 is provided with a limit groove 211, the transmission block 22 is provided with a limit column 222, and the limit column 222 cooperates with the limit groove 211.

[0026] The photosensitive regulating assembly 3 includes an extension frame 31, a first photosensitive head 32, a second photosensitive head 33, an adjusting plate 34 and a fixing block 35. One end of the extension frame 31 is detachably connected to the transmission block 22, the first photosensitive head 32 is arranged on the transmission block 22, and the other end of the extension frame 31 is connected to the second photosensitive head 33. The upper end of the curtain 4 is connected to the fixing seat 1, and the lower end of the curtain 4 is connected to the extension frame 31; a through hole 311 is provided on one end of the extension frame 31, and a threaded hole 223 is provided on the transmission block 22, and the through hole 311 matches with the threaded hole 223; a C-shaped groove 312 is provided on the other end of the extension frame 31, and the adjusting plate 34 is provided with a threaded hole 223. The fixing block 35 is fitted in the C-shaped groove 312, and is detachably connected to the adjustment plate 34. The fixing groove 351 on the fixing block 35 cooperates with the curtain 4, and the second photosensitive head 33 is arranged on the fixing block 35; a threaded locking hole 352 is provided on the fixing block 35, and the threaded locking hole 352 is communicated with the fixing groove 351, and the threaded locking hole 352 cooperates with a screw 353, and the end of the screw 353 abuts on the curtain 4 in the fixing groove 351; the photosensitive regulating component 3 includes two groups, and the two groups of photosensitive regulating components 3 are distributed on the left and right with the transmission block 22 as the symmetrical center, and the two groups of the fixing grooves 351 are respectively abutted against the left and right ends of the curtain 4.

[0027] Furthermore, a hook 11 is provided on the fixing base 1 , and the upper end of the curtain 4 is detachably connected to the hook 11 .

[0028] Description of the working method of this utility model:

[0029] The photosensitive control device of the projection screen 4 adopts this structure, and the setting function of the fixing base 1 is to fasten it to the wall. The fixing base 1 is provided with a plurality of holes for fixing, and the fixing base 1 can be fixed by screws or expansion screws 353. Therefore, the upper end of the screen 4 can be detachably connected to the hook 11 on the fixing base 1 to fix the screen 4. In order to realize the rolling of the screen 4, a structure that can be lifted up and down is required. Therefore, a vertically placed transmission rail 21 is provided on the fixing base 1. Support seats 23 are arranged on the upper and lower end surfaces of the transmission rail 21, and the upper and lower ends of the screw rod 24 are connected to the upper and lower two sets of support seats 23 through bearings. The output end of the motor 25 on the fixed seat 1 is connected to the screw rod 24, so that the starting motor 25 can drive the screw rod 24 to rotate. The transmission block 22 is provided with a screw hole 221 that penetrates from top to bottom, and the screw hole 221 is meshed with the external thread 241 on the screw rod 24, and the transmission rail 21 is provided with a limit groove 211, and the transmission block 22 is provided with a limit groove 211. The limit column 222 is matched with the limit column 222, so in the process of driving the screw rod 24 to rotate, the spiral pair transmission principle is used to convert the rotational motion of the motor 25 into the linear motion of the transmission block 22 on the screw rod 24, so as to realize the up and down translation of the transmission block 22, and the threaded hole 223 on the transmission block 22 is matched with the through hole 311 on one end of the extension frame 31, and the extension frame 31 can be locked on the transmission block 22 by the screw 353, and the C-shaped groove 312 on the other end of the extension frame 31 is matched with the adjustment plate 34, and the adjustment plate 34 is connected to the C-shaped groove 312 on the other end of the extension frame 31. The fixing groove 351 on the fixing block 35 detachably connected to the plate 34 is used to connect the lower end of the curtain 4. The screw 353 is locked into the threaded locking hole 352 on the fixing block 35, and the end of the screw 353 abuts against the curtain 4 for fixing. Therefore, after the motor 25 drives the lead screw 24 to rotate, the transmission block 22 moves downward, which will drive the adjustment plate 34 on the extension frame 31 to drive the fixing block 35 to clamp the lower end of the curtain 4 and move downward, so that the curtain 4 can be raised and lowered under the drive of the motor 25.

[0030] In order to realize the automatic raising and lowering of the screen 4 when the projector is turned on to project on the wall, a first photosensitive head 32 is set on the transmission block 22, and a second photosensitive head 33 is set on the fixed block 35. In the daily environment of the conference room, the lights are either turned off or on. No matter which state is in, the amount of light in the light-off state and the light-on state is close. Therefore, the light source information that the first photosensitive head 32 and the second photosensitive head 33 can receive is consistent. At this time, the screen 4 is not raised or lowered by default because it is not in the use environment of the projector. When the projector is turned on, the light projected by the projector will shine on the wall to form a rectangular highlight display area. Since the transmission block 22 is located at the lower end of the screen 4 in the reeled state, the highlight display area will first be projected onto the first photosensitive head 32 on the transmission block 22, and the second photosensitive head 33 on the fixed block 35 is located at the screen. 4, the highlighted display area will not be able to be illuminated by the second photosensitive head 33. When the conference lights are still on, the light source information obtained by the first photosensitive head 32 and the second photosensitive head 33 is not much different, and the curtain 4 will not be lowered; when the lights in the conference room are turned off, the light source information obtained by the first photosensitive head 32 and the second photosensitive head 33 will be very different. At this time, it can be considered that the projector has been turned on and the lights have been turned off to prepare for the meeting, so the motor 25 is started to lower and unfold the rolled-up curtain 4 until the first photosensitive head 32 is separated from the highlighted display area, so that the first photosensitive head 32 and the second photosensitive head 33 are both in the dark area with the same light source information, and the unfolded state of the curtain 4 is maintained until the lights are turned on, which changes the light source information received by the first photosensitive head 32 and the second photosensitive head 33, and then the curtain 4 is rolled up, thereby completing the lifting effect of the projection screen curtain 4 by controlling the light sensitivity.

[0031] Since the sizes of the screen 4 are different, if only one end of the screen 4 is clamped by a set of fixing blocks 35, if the screen 4 is small, it will not have much impact. If the screen 4 is large, one end of the screen 4 will be tightened, but the other end will be loose, which greatly reduces the projection effect. Therefore, two sets of photosensitive control components 3 are set to symmetrically clamp the left and right ends of the lower end of the screen 4 and lift it up and down at the same time. On the one hand, the whole screen 4 can be tightened to ensure a good projection effect. On the other hand, the lifting process will be smoother. At the same time, in order to adapt to the sizes of screens 4 of different sizes, the cooperation of the C-shaped groove 312 and the adjustment plate 34 can extend and retract the adjustment plate 34 horizontally, so that it is suitable for screens 4 of different lengths.

[0032] The beneficial effect of the utility model is that the rotational motion of the motor 25 can be converted into the linear motion of the transmission block 22 on the screw rod 24 by driving the motor 25 to rotate, so as to realize the up and down translation of the transmission block 22, thereby driving the adjustment plate 34 on the extension frame 31 to drive the fixing block 35 to clamp the lower end of the curtain 4 and move downward, so that the curtain 4 can be lifted up and down under the drive of the motor 25. In order to ensure the smooth lifting and lowering of the curtain 4, two groups of photosensitive control components 3 are provided to clamp the left and right ends of the lower end of the curtain 4 for smooth lifting and lowering. At the same time, through the linkage of the first photosensitive head 32 and the second photosensitive head 33, the lifting effect of the projection screen curtain 4 can be controlled by photosensitive.

[0033] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A photosensitive control device for a projection screen, which is used to control the lifting of the screen, and is characterized by: It includes a fixed seat, a driving component and a photosensitive control component, the driving component includes a transmission rail and a transmission block, the transmission rail is vertically arranged and connected to the fixed seat, the transmission block can be movably connected to the transmission rail, the photosensitive control component includes an extension frame, a first photosensitive head and a second photosensitive head, one end of the extension frame is detachably connected to the transmission block, the first photosensitive head is arranged on the transmission block, and the other end of the extension frame is connected to the second photosensitive head, the upper end of the curtain is connected to the fixed seat, and the lower end of the curtain is connected to the extension frame.

2. The light-sensitivity control device for projection screen cloth according to claim 1, characterized in that: The driving assembly also includes two groups of support seats, a screw rod and a motor. The two groups of support seats are respectively arranged on the upper and lower end surfaces of the transmission rail. The upper and lower ends of the screw rod are respectively connected to the two groups of support seats through bearings. The motor is arranged on a fixed seat, and the output end of the motor is connected to the upper end of the screw rod. The transmission block is provided with a screw hole, and the screw hole is engaged with the external thread on the screw rod.

3. The light-sensitivity control device for projection screen cloth according to claim 2, characterized in that: The transmission rail is provided with a limiting groove, the transmission block is provided with a limiting column, and the limiting column matches the limiting groove.

4. The light-sensitivity control device for projection screen cloth according to claim 1, characterized in that: The photosensitive control component also includes an adjustment plate and a fixed block. A through hole is provided on one end of the extension frame, and a threaded hole is provided on the transmission block, and the through hole cooperates with the threaded hole; a C-shaped groove is provided on the other end of the extension frame, and the adjustment plate cooperates in the C-shaped groove. The fixed block is detachably connected to the adjustment plate, and the fixing groove on the fixed block cooperates with the curtain, and the second photosensitive head is arranged on the fixed block.

5. The light-sensitivity control device for projection screen cloth according to claim 4, characterized in that: The fixing block is provided with a threaded locking hole, the threaded locking hole is communicated with the fixing groove, the threaded locking hole is matched with a screw, and the end of the screw abuts against the curtain in the fixing groove.

6. The light-sensitivity control device for projection screen cloth according to claim 5, characterized in that: The photosensitive regulating components include two groups, and the two groups of photosensitive regulating components are distributed on the left and right sides with the transmission block as the symmetrical center. The two groups of fixing grooves are respectively connected to the left and right ends of the curtain so as to be abutted.

7. The light-sensitivity control device for projection screen cloth according to claim 1, characterized in that: The fixing seat is provided with a hook, and the upper end of the curtain is detachably connected to the hook.

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