Projection curtain device

Abstract

The invention discloses a projection curtain device which comprises a box body, a winding mechanism, a curtain and a supporting mechanism. The winding mechanism is arranged in the box body; one end of the curtain is connected with the winding mechanism; the supporting mechanism comprises a connecting plate, a driving assembly and two supporting chains. The connecting plate is connected with the other end of the curtain; the driving assembly is arranged in the box body; one ends of the two supporting chains are both located in the box body, the other ends of the two supporting chains are connected with the two ends of the connecting plate correspondingly, and the two supporting chains are both connected with the output end of the driving assembly; wherein the curtain has a rolling state and an opening state, and when the curtain is in the rolling state, the connecting plate and the two supporting chains are all contained in the box body. According to the projection curtain device, through mutual cooperation of the winding mechanism, the connecting plate and the two supporting chains, it can be ensured that the curtain is unfolded flatly, and a good projection effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display devices, in particular to a projection screen device. BACKGROUND

[0002] In the related art, the screen is reduced in size by winding, but the wound screen is prone to unevenness after being unwound again, thereby affecting the projection effect.

[0003] Therefore, the prior art needs to be improved and developed. SUMMARY

[0004] The purpose of the present application is to provide a projection screen device that can ensure that the screen is unwound flat to achieve good projection effect.

[0005] The present application provides a projection screen device, which comprises:

[0006] a box body;

[0007] a winding mechanism arranged in the box body;

[0008] a screen, one end of the screen being connected to the winding mechanism; and

[0009] a supporting mechanism comprising a connecting plate, a driving assembly and two supporting chains, the connecting plate being connected to the other end of the screen, the driving assembly being arranged in the box body, one end of each of the two supporting chains being located in the box body, the other end of each of the two supporting chains being connected to one end of the connecting plate, and each of the two supporting chains being connected to the output end of the driving assembly.

[0010] The screen has a wound state and an unwound state, and when the screen is in the wound state, the connecting plate and the two supporting chains are accommodated in the box body.

[0011] According to an embodiment of the present application, the driving assembly comprises two driving motors and two transmission members, each transmission member comprising a worm and an output gear, the two worms being connected to the output shafts of the two driving motors, the helical teeth on the two worms being engaged with the two output gears respectively, and the toothed portions of the two supporting chains being engaged with the two output gears respectively.

[0012] According to an embodiment of the present application, each transmission member further comprises a transmission gear set, the transmission gear set comprising a first double-pulley gear and a second double-pulley gear, the large gear of the first double-pulley gear being engaged with the helical teeth on the worm, the small gear of the first double-pulley gear being engaged with the large gear of the second double-pulley gear, and the small gear of the second double-pulley gear being engaged with the output gear.

[0013] According to an embodiment of the present application, the support mechanism further comprises two turning pieces, both of which are arranged in the box body, and the other ends of the two support chains pass through the two turning pieces respectively.

[0014] According to an embodiment of the present application, each of the turning pieces comprises two turning plates, both of which are arranged oppositely and have arc segments, and a turning channel is formed between the two arc segments, and the other end of the support chain passes through the turning channel.

[0015] According to an embodiment of the present application, the box body is provided with a micro switch, which is electrically connected to the winding mechanism and the support mechanism, and the connecting plate abuts against the micro switch when the curtain is in the winding state.

[0016] According to an embodiment of the present application, each of the support chains comprises a plurality of middle plates, a plurality of side plates and a plurality of shafts, each of the middle plates has a toothed portion, the middle plates and the side plates are arranged alternately, and adjacent two middle plates are connected to the side plates through the shafts, so that adjacent two support chains and adjacent two side plates can rotate relatively.

[0017] According to an embodiment of the present application, the connecting plate is provided with a groove, and a detachable mounting strip is arranged in the groove, and the other end of the curtain is located between the groove and the mounting strip.

[0018] According to an embodiment of the present application, the winding mechanism comprises two fixing pieces, a winding pipe, a winding motor and a connecting shaft, both of the fixing pieces are arranged oppositely in the box body, both ends of the winding pipe are rotatably arranged on the two fixing pieces respectively, the winding motor is fixedly arranged on one of the two fixing pieces and located in the winding pipe, the connecting shaft is located in the winding pipe, the connecting shaft is connected to the output shaft of the winding motor, a connecting key is arranged on the side wall of the connecting shaft, and the connecting key extends into a key groove arranged in the inner side wall of the winding pipe.

[0019] According to an embodiment of the present application, a rotating sleeve is arranged on each of the fixing pieces, a bearing is arranged between the fixing piece and the rotating sleeve, and both ends of the winding pipe are arranged in the two rotating sleeves respectively.

[0020] The projection curtain device of the present application can ensure that the curtain is unfolded flat and good projection effect is achieved through the cooperation of the winding mechanism, the connecting plate of the support mechanism and the two support chains. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0022] Figure 1 Structure schematic diagram of the projection curtain device when the curtain is in the rolled state in the embodiment of the present application;

[0023] Figure 2 Sectional view of the projection curtain device when the curtain is in the rolled state in the embodiment of the present application; Figure 1 ;

[0024] Figure 3 Sectional view of the projection curtain device when the curtain is in the rolled state in the embodiment of the present application; Figure 2 ;

[0025] Figure 4 Structure schematic diagram of the projection curtain device when the curtain is in the opened state in the embodiment of the present application;

[0026] Figure 5 Sectional view of the projection curtain device when the curtain is in the opened state in the embodiment of the present application;

[0027] Figure 6 Local enlarged view of A in Figure 4 ;

[0028] Figure 7 Local enlarged view of B in Figure 5 ;

[0029] Figure 8 Structure schematic diagram of the support chain in the embodiment of the present application;

[0030] Figure 9 Exploded schematic diagram of the rolling mechanism in the embodiment of the present application.

[0031] Explanation of reference signs:

[0032] 1, box body; 2, rolling mechanism; 21, fixing piece; 22, rolling pipe; 221, key groove; 23, rolling motor; 24, connecting shaft; 241, connecting key; 25, rotating sleeve; 26, bearing; 3, curtain; 4, support mechanism; 41, connecting plate; 411, recess; 412, mounting strip; 42, support chain; 421, middle plate; 4211, tooth part; 422, side plate; 423, mandrel; 43, driving motor; 44, worm; 45, output gear; 46, first double gear; 47, second double gear; 48, turning plate; 481, arc segment; 5, micro switch. DETAILED DESCRIPTION

[0033] The embodiments of the present application will be described herein below with reference to a few drawings. DETAILED DESCRIPTION

[0034] It should be noted that the terms "first", "second" and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the descriptive terms "first", "second", etc., are to be interpreted, by those skilled in the art, as a structural or functional pertinence but not a chronological or sequential precedence. As such, no structure, act, or combination of structures or acts are necessarily "prior" or "subsequent" to another structure, act, or combination of structures or acts except as can be indicated by the specific context.

[0035] In addition, throughout this application the use of "can", "could", "might", "may", "should", "would", "will", "intend", "expect", "plan", "anticipate", "envisage", "contemplate", "propose", "imply" and the like, are understood as allowing for a certain category of experimental, heuristic or similar approaches "under normal or expected circumstances" or "in the absence of a contraindication" or "in the absence of something specific which would render such an approach inadvisable". In addition, the use of "comprise", "comprises", "comprising", "include", "includes", "including" and the like are understood in the context as "provide for" or "offer without limitation" rather than "strictly consist of" or "contain exclusively".

[0036] In order to further illustrate the application, the following examples are provided with reference to the accompanying drawings, wherein:

[0037] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the present application provides a projection screen device, comprising a box body 1, a winding mechanism 2, a screen 3 and a supporting mechanism 4. The winding mechanism 2 is arranged in the box body 1. One end of the screen 3 is connected with the winding mechanism 2. The supporting mechanism 4 comprises a connecting plate 41, a driving assembly and two supporting chains 42. The connecting plate 41 is connected with the other end of the screen 3. The driving assembly is arranged in the box body 1. One end of each of the two supporting chains 42 is located in the box body 1, the other end of each of the two supporting chains 42 is connected with two ends of the connecting plate 41 respectively, and the two supporting chains 42 are connected with the output end of the driving assembly.

[0038] In a specific application, when the projection screen device is not used, the winding mechanism 2 can wind the screen 3, so that the screen 3 is in a winding state, at this time, the connecting plate 41 and the two supporting chains 42 are accommodated in the box body 1, reducing the space occupied by the projection screen device; when the projection screen device needs to be used, the winding mechanism 2 unwinds the screen 3, at the same time, the driving assembly drives the two supporting chains 42 to move, so that the two supporting chains 42 drive the connecting plate 41 to move, so that the screen 3 is flat and unfolded to become an open state.

[0039] Through the above technical solution, not only can the screen 3 be flat and unfolded under the cooperation of the winding mechanism 2, the connecting plate 41 and the two supporting chains 42 of the supporting mechanism 4, but also the screen 3 can be unfolded upward relative to the box body 1 and unfolded downward relative to the box body 1, so that the application range is wider.

[0040] Specifically, the winding mechanism 2 and the supporting mechanism 4 are electrically connected to the control system of the projection screen device, and the control system of the projection screen device controls the winding mechanism 2 and the supporting mechanism 4 to act, so that the screen 3 is switched between the winding state and the open state.

[0041] In a specific application, the driving assembly includes two driving motors 43 and two transmission members, each transmission member includes a worm 44 and an output gear 45, the two worms 44 are connected to the output shafts of the two driving motors 43 respectively, the helical teeth on the two worms 44 are engaged with the two output gears 45 respectively, and the tooth portions 4211 of the two supporting chains 42 are engaged with the two output gears 45 respectively. When the projection screen device is used, the two driving motors 43 simultaneously generate driving forces to drive the two worms 44 to rotate, the two worms 44 drive the two output gears 45 to rotate, the two output gears 45 drive the two supporting chains 42 to move synchronously, thereby driving the connecting plate 41 to move, so that the other end of the screen 3 is flat and unfolded under the driving of the connecting plate 41.

[0042] In some preferred embodiments, the box body 1 is provided with a micro switch 5, the micro switch 5 is electrically connected to the winding mechanism 2 and the supporting mechanism 4, and the connecting plate 41 abuts against the micro switch 5 when the screen 3 is in the winding state. In a specific application, the micro switch 5 is electrically connected to the control system of the projection screen device, when the screen 3 is wound to abut against the micro switch 5, the micro switch 5 feeds back a signal to the control system of the projection screen device, and the control system of the projection screen device controls the winding mechanism 2 and the supporting mechanism 4 to stop acting, so as to avoid that the winding mechanism 2 and the supporting mechanism 4 continue to act to damage the screen 3 or the connecting plate 41.

[0043] As Figure 6As shown, in some preferred embodiments, the connecting plate 41 is provided with a groove 411, and a detachable mounting strip 412 is arranged in the groove 411, and the other end of the curtain 3 is located between the groove 411 and the mounting strip 412. When connecting the other end of the curtain 3 with the connecting plate 41, the other end of the curtain 3 can be first placed in the groove 411, and then the mounting strip 412 is connected with the connecting plate 41 by screws, so that the flatness of the connection between the other end of the curtain 3 and the connecting plate 41 can be ensured.

[0044] Since the curtain 3 is mostly made of cloth or flexible material, if the rotating speed fluctuates greatly during the winding process, the curtain 3 may be wrinkled, the edge may be pulled or even torn, therefore, in some preferred embodiments, each transmission part further comprises a transmission gear set, the transmission gear set comprises a first double gear 46 and a second double gear 47, the large gear of the first double gear 46 is engaged with the helical teeth on the worm 44, the small gear of the first double gear 46 is engaged with the large gear of the second double gear 47, and the small gear of the second double gear 47 is engaged with the output gear 45. Through the technical scheme, the stability of winding can be improved, so that the curtain 3 can be uniformly and flatly wound.

[0045] It can be understood that the gear with a relatively larger diameter in the two coaxial gears of the first double gear 46 is the large gear of the first double gear 46, the gear with a relatively smaller diameter in the two coaxial gears of the first double gear 46 is the small gear of the first double gear 46, the gear with a relatively larger diameter in the two coaxial gears of the second double gear 47 is the large gear of the second double gear 47, and the gear with a relatively smaller diameter in the two coaxial gears of the second double gear 47 is the small gear of the second double gear 47.

[0046] In order to reduce the volume of the projection curtain device, as shown, Figure 7 As shown, in some preferred embodiments, the support mechanism 4 further comprises two turning parts. The two turning parts are arranged in the box body 1, and the other ends of the two support chains 42 pass through the two turning parts. Through the technical scheme, the support chain 42 can be turned under the action of the turning part, so that the support chain 42 can be folded and stored in the box body 1, so that the volume of the box body 1 can be reduced, and the volume of the projection curtain device is also correspondingly reduced.

[0047] Specifically, each turning part comprises two turning plates 48, the two turning plates 48 are oppositely arranged, and the two turning plates 48 each have an arc segment 481, and a turning channel is formed between the two arc segments 481, and the other end of the support chain 42 passes through the turning channel. Through the technical scheme, it can be ensured that the support chain 42 can be smoothly turned when the curtain 3 is wound or unwound.

[0048] As shown, Figure 8As shown, specifically, each support chain 42 comprises a plurality of middle plates 421, a plurality of side plates 422 and a plurality of shafts 423. Each middle plate 421 has a tooth portion 4211, the middle plates 421 and the side plates 422 are staggered, and two adjacent middle plates 421 are connected by the shafts 423 and the side plates 422, so that two adjacent support chains 42 and two adjacent side plates 422 can rotate relative to each other.

[0049] Preferably, each support chain 42 is provided with a side plate 422 on both sides of the middle plate 421.

[0050] As shown in Figure 2 and Figure 9 As shown in some preferred embodiments, the winding mechanism 2 comprises two fixed parts 21, a winding pipe 22, a winding motor 23 and a connecting shaft 24. The two fixed parts 21 are arranged opposite to each other in the box body 1. The two ends of the winding pipe 22 are rotatably arranged on the two fixed parts 21, and one end of the curtain 3 is connected to the winding pipe 22. The winding motor 23 is fixedly arranged on one of the two fixed parts 21 and located in the winding pipe 22. The connecting shaft 24 is located in the winding pipe 22, the connecting shaft 24 is connected to the output shaft of the winding motor 23, and the side wall of the connecting shaft 24 is provided with a connecting key 241 which extends into the key groove 221 formed in the inner side wall of the winding pipe 22. Through the technical scheme, the winding motor 23 does not need to occupy extra space, so that the structure of the winding mechanism 2 is more compact and the volume is smaller.

[0051] In some preferred embodiments, a rotating sleeve 25 is arranged on each fixed part 21, a bearing 26 is arranged between the fixed part 21 and the rotating sleeve 25, and the two ends of the winding pipe 22 are arranged in the two rotating sleeves 25. Through the technical scheme, the rotation accuracy of the winding pipe 22 can be ensured, so that the curtain 3 can be wound flat on the winding pipe 22.

[0052] In summary, in one or more embodiments of the present application, the projection curtain device of the present application can ensure that the curtain is flat and unfolded to achieve good projection effect through the cooperation of the winding mechanism, the connecting plate of the support mechanism and the two support chains.

[0053] The above merely describes the embodiments of the present application and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A projection screen device, characterized by The utility model relates to a curtain box, which comprises: a box body (1); a winding mechanism (2) arranged in the box body (1); a curtain (3) with one end connected to the winding mechanism (2); and a supporting mechanism (4) comprising a connecting plate (41), a driving assembly and two supporting chains (42), wherein the connecting plate (41) is connected to the other end of the curtain (3), the driving assembly is arranged in the box body (1), one end of each of the two supporting chains (42) is located in the box body (1), the other end of each of the two supporting chains (42) is connected to one end of the connecting plate (41), and the two supporting chains (42) are connected to the output end of the driving assembly. The curtain (3) has a winding state and an open state, and the connecting plate (41) and the two supporting chains (42) are accommodated in the box body (1) when the curtain (3) is in the winding state.

2. The projection screen device of claim 1, wherein, The driving assembly comprises two driving motors (43) and two transmission members, each transmission member comprises a worm (44) and an output gear (45), the two worms (44) are connected to the output shafts of the two driving motors (43), the helical teeth on the two worms (44) are meshed with the two output gears (45), and the tooth portions (4211) of the two supporting chains (42) are meshed with the two output gears (45).

3. The projection screen device of claim 2, wherein, Each transmission member further comprises a transmission gear set, the transmission gear set comprises a first double-gear (46) and a second double-gear (47), the large gear of the first double-gear (46) is meshed with the helical teeth on the worm (44), the small gear of the first double-gear (46) is meshed with the large gear of the second double-gear (47), and the small gear of the second double-gear (47) is meshed with the output gear (45).

4. The projection screen apparatus of claim 1, wherein The supporting mechanism (4) further comprises two turning members, each turning member is arranged in the box body (1), and the other end of each supporting chain (42) passes around the two turning members.

5. The projection screen device of claim 4, wherein, Each turning member comprises two turning plates (48), the two turning plates (48) are oppositely arranged, each turning plate (48) has an arc segment (481), a turning channel is formed between the two arc segments (481), and the other end of the supporting chain (42) passes through the turning channel.

6. The projection screen apparatus of claim 1, wherein, A micro switch (5) is arranged in the box body (1), the micro switch (5) is electrically connected to the winding mechanism (2) and the supporting mechanism (4), and the connecting plate (41) abuts against the micro switch (5) when the curtain (3) is in the winding state.

7. The projection screen apparatus of claim 1, wherein Each of the support chains (42) comprises a plurality of middle plates (421), a plurality of side plates (422) and a plurality of shafts (423); each of the middle plates (421) has a tooth portion (4211), the middle plates (421) and the side plates (422) are staggered, and two adjacent middle plates (421) are connected with the side plates (422) through the shafts (423), so that two adjacent support chains (42) and two adjacent side plates (422) can rotate relative to each other.

8. The projection screen apparatus of claim 1, wherein, The connecting plate (41) is provided with a groove (411), and the groove (411) is provided with a detachable mounting strip (412); the other end of the curtain (3) is located between the groove (411) and the mounting strip (412).

9. The projection screen apparatus of claim 1, wherein, The winding mechanism (2) comprises two fixing members (21), a winding pipe (22), a winding motor (23) and a connecting shaft (24); the two fixing members (21) are oppositely arranged in the box body (1); the two ends of the winding pipe (22) are rotatably arranged on the two fixing members (21) respectively; the winding motor (23) is fixedly arranged on one of the two fixing members (21) and located in the winding pipe (22); the connecting shaft (24) is located in the winding pipe (22), the connecting shaft (24) is connected with the output shaft of the winding motor (23), and the side wall of the connecting shaft (24) is provided with a connecting key (241) which extends into a key groove (221) formed in the inner side wall of the winding pipe (22).

10. The projection screen device of claim 9, wherein, A rotating sleeve (25) is sleeved on each of the fixing members (21), a bearing (26) is arranged between the fixing member (21) and the rotating sleeve (25), and the two ends of the winding pipe (22) are sleeved on the two rotating sleeves (25) respectively.

Images