Remote projection display device with rotary light shield

Abstract

The utility model discloses a remote projection display device with a rotary light shield. The rotary light shield comprises a top light shield plate and a plurality of side light shield plates. The top shading plate comprises an upper shading plate and two wing plates, and the tops of the two wing plates are rotatably connected with the tops of the two side walls of the shell respectively; the multiple side shading plates are arranged on the two side walls of the shell correspondingly, and the tops of the side shading plates are rotationally connected with the tops of the side walls of the shell; the wing plate and the side shading plate which are arranged on the same side wall of the shell rotate around the same rotating shaft; after the rotary light shield is opened, the top light shield plate rotates relative to the window, the side light shield plates are connected with the wing plates and the side walls of the shell, and the wing plates and the side light shield plates arranged on the same side wall of the shell form side light shield plates of the rotary light shield; after the rotary light shield is closed, the wing plate and the side light shield which are arranged on the same side wall of the shell coincide with the side wall of the shell. When the remote projection display device is not used, the light shield can be folded, so that the space is not occupied, and the storage is convenient.

Description

Technical Field

[0001] This utility model relates to a projection display device, and more particularly to a projection display device with a rotating light shield. Background Technology

[0002] In recent years, head-up displays have become increasingly popular as desktop office and reading devices. These displays can magnify the image on their built-in screen and project it to near infinity, reducing eye strain and helping to prevent myopia.

[0003] Most existing projection display devices have their windows tilted. Due to the large window area, stray light interference caused by the reflection of external light on the window surface is quite noticeable during the use of the projection display device. This not only affects the image quality, but also the reflected light and glare can easily damage the eyes. Therefore, it is necessary to install a light shield for the projection display device. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a projection display device with a rotating light shield.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] A projection display device with a rotating light shield includes a housing, a viewing window on the front of the housing, and the rotating light shield including a top light shield and multiple side light shields; wherein,

[0007] The top light shield includes an upper light shield and two wing plates. The tops of the two wing plates are rotatably connected to the tops of the two side walls of the housing, so that the top light shield can rotate toward or away from the viewing window.

[0008] Multiple side light shields are respectively disposed on two side walls of the housing. The top of the side light shields is rotatably connected to the top of the side wall of the housing, and the rotation direction of the side light shields is the same as that of the top light shield.

[0009] The wing plate and the side light shield, which are disposed on the same side wall of the outer shell, rotate about the same rotation axis.

[0010] When the rotating light shield is opened, the top light shield rotates relative to the window. The side light shield connects the wing plate and the side wall of the housing. The wing plate and the side light shield, which are located on the same side wall of the housing, form the side light shield of the rotating light shield. When the rotating light shield is closed, the wing plate and the side light shield, which are located on the same side wall of the housing, overlap with the side wall of the housing.

[0011] Preferably, the wing plate and the side light shield are provided on the same side wall of the outer shell; the maximum rotation angle of the side light shield relative to the outer shell is between 25 degrees and 45 degrees; the maximum rotation angle of the top light shield relative to the side light shield is between 25 degrees and 45 degrees.

[0012] Alternatively, preferably, the wing plate and a plurality of the side shading plates are provided on the same side wall of the housing; the maximum rotation angle of the top shading plate relative to the viewing window is not less than 60 degrees and not more than 155 degrees.

[0013] Preferably, the maximum rotation angle between two adjacent side shielding plates is between 15 degrees and 45 degrees.

[0014] Preferably, on the same side of the housing, the wing plate and at least one side light shield are connected to the side wall of the housing via the same connector, and the at least one side light shield is located between the housing and the wing plate, or the at least one side light shield is located outside the housing and the wing plate.

[0015] Preferably, a first guide structure is provided between two adjacent side light-shielding plates, and the first guide structure limits the maximum rotation angle between the two adjacent side light-shielding plates.

[0016] Preferably, a second guide structure is provided between the side wall of the housing and the side light shield adjacent to the housing, the second guide structure limiting the maximum rotation angle of the side light shield adjacent to the housing relative to the housing; and / or,

[0017] A third guide structure is provided between the wing plate and the side shading plate adjacent to the wing plate; the third guide structure limits the maximum rotation angle of the wing plate relative to the side shading plate adjacent to the wing plate.

[0018] Preferably, the shape of the upper light shield at least covers the viewing window of the projection display device.

[0019] Preferably, in the open state, the lower edges of the wing plate and the lower edges of the side shading plate, which are located on the same side wall, are arc-shaped and protrude towards the bottom.

[0020] Preferably, in the open state, the lower edge of the side shading plate and the lower edge of the wing plate, which are located on the same side wall, form an arc that is recessed towards the top.

[0021] The present invention provides a projection display device with a rotating light shield. The rotating light shield includes a top light shield and multiple side light shields. The top light shield includes an upper light shield and two wing plates, the tops of which are rotatably connected to the tops of the two side walls of the outer casing. The multiple side light shields are respectively disposed on the two side walls of the outer casing, and the tops of the side light shields are rotatably connected to the tops of the side walls of the outer casing. The wing plates and side light shields disposed on the same side wall of the outer casing rotate around the same rotation axis. When the rotating light shield is fully opened, the top light shield rotates relative to the outer casing, the side light shields connect the wing plates and the outer casing, and the wing plates and side light shields disposed on the same side wall of the outer casing form the side light shields of the rotating light shield. When the rotating light shield is closed, the wing plates and side light shields disposed on the same side wall of the outer casing overlap with the side wall of the outer casing. When not in use, the light shield of the above-mentioned projection display device can be folded, saving space and facilitating storage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the projection display device in the first implementation, with the rotating light shield in a folded state;

[0023] Figure 2 This is a schematic diagram of the projection display device in the first implementation, with the rotating light shield in the open state;

[0024] Figure 3 This is a schematic diagram of the structure of the projection display device in the first implementation.

[0025] Figure 4 This is a schematic diagram of the top light-shielding plate in the first implementation.

[0026] Figure 5 This is a schematic diagram of the structure of a single side shading plate in the first implementation;

[0027] Figure 6 This is a schematic diagram of the top connection structure of the projection display device in the first implementation.

[0028] Figure 7 This is a schematic diagram of the friction plate structure in the first implementation.

[0029] Figure 8 This is a schematic diagram of the projection display device in the second embodiment, with the rotating light shield in a folded state. Figure 1 ;

[0030] Figure 9 This is a schematic diagram of the projection display device in the second embodiment, with the rotating light shield in a folded state. Figure 2 ;

[0031] Figure 10 This is a schematic diagram of the projection display device in the second embodiment, with the rotating light shield in the open state. Figure 1 ;

[0032] Figure 11 This is a schematic diagram of the projection display device in the second embodiment, with the rotating light shield in the open state. Figure 2 ;

[0033] Figure 12 This is an exploded view of the projection display device with a rotating light shield in the second embodiment;

[0034] Figure 13 This is a three-dimensional structural diagram of the top light-shielding plate in the second implementation.

[0035] Figure 14 This is a schematic diagram of the outer side surface of the side shading plate in the second embodiment;

[0036] Figure 15 This is a schematic diagram of the inner side surface of the side shading plate in the second embodiment;

[0037] Figure 16 This is a schematic diagram of the casing of the projection display device in the second embodiment. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] like Figure 1 and Figure 2 As shown, the present invention provides a telephoto display device with a rotating light shield, comprising a housing 101, a viewing window 110 on the front of the housing 101, and side walls and a rear wall. Inside the housing 101 are a display screen, a beam splitter, and a curved reflector. The display screen faces the beam splitter, and the beam splitter and curved reflector are positioned opposite each other, with the beam splitter close to the viewing window 110. In use, the display screen emits light towards the beam splitter. At least a portion of the light is reflected by the beam splitter to the curved reflector, and then reflected back to the beam splitter. At least a portion of the light then passes through the beam splitter and the viewing window 110, projecting an image onto the exit pupil. This rotating telephoto display device magnifies and projects the image onto the display screen through an optical magnification system, presenting it through the viewing window 110. The user, positioned at the exit pupil in front of the beam splitter, can view a magnified virtual image at least 3 meters away and at least 30 inches in size, allowing for continuous viewing during use.

[0042] The aforementioned projection display device has a rotating light shield to block ambient light directed towards the viewing window 110, thereby reducing reflected stray light and glare. For example... Figure 1 As shown, this rotating sunshade can be folded when not in use, saving space, and, as Figure 2 As shown, the rotating sunshade can be opened during use to block strong light from the top and sides of the viewing window 110. Furthermore, preferably, the rotating sunshade can cover the viewing window 110 when folded, thus protecting the viewing window 110.

[0043] Specifically, such as Figure 2 As shown, the rotating light shield includes a top light shield 102 and multiple side light shields 103. The top light shield 102 includes an upper light shield and two wing plates. The top of the wing plates is rotatably connected to the top of the side wall of the housing 101, so that the top light shield 102 can rotate towards or away from the viewing window 110. The tops of the multiple side light shields 103 are rotatably connected to the top of the side wall of the housing 101, and one or more side light shields 103 can be provided on each side wall of the housing 101. The rotation direction of the side light shields 103 is the same as that of the top light shield. The wing plate and the side light shield 103, which are set on the same side wall of the outer shell 101, rotate around the same rotation axis; after the rotating light shield is opened, the top light shield 102 rotates relative to the viewing window 110, and the side light shield 103 connects the wing plate and the side wall of the outer shell 101. Furthermore, the wing plate and the side light shield 103, which are set on the same side wall of the outer shell 101, form the side light shield of the rotating light shield; after the rotating light shield is closed, the wing plate and the side light shield 103, which are set on the same side wall of the outer shell 101, coincide with the side wall of the outer shell 101 respectively.

[0044] The first and second embodiments illustrate structures with multiple side light-shielding plates 103 (four shown in the figure) on a single side wall of the housing 101 and a single light-shielding plate on a single side wall of the housing 101, respectively. When other numbers of side light-shielding plates are provided on the same side wall of the housing 101, the structure of the light shield is generally similar to that of the first embodiment.

[0045] First Embodiment

[0046] like Figure 1 and Figure 2 As shown, in this embodiment, a plurality of side light shields 103 are provided on each side wall of the housing 101, including: the innermost side light shield 135, one or more intermediate side light shields 136, 137 and the outermost side light shield 138.

[0047] A wing plate and multiple side light-shielding plates 103, located on the same side of the housing 101, are connected to the top of the side wall of the housing 101 via a common connector. The centerline of this connector forms the rotation axis of the wing plate and the multiple side light-shielding plates 103. Along this rotation axis, the multiple side light-shielding plates 103 are located outside the housing 101 and the wing plate. It is understood that the multiple side light-shielding plates 103 can also be located between the housing 101 and the wing plate along this rotation axis. The connector can be a combination of screws 107, springs 108, and friction plates 104. It works in conjunction with a fixing post 111 located on the top of the side wall of the housing 101, a light-shielding shaft 125 and a fixing post 123 located on the top of the wing plate, and a shaft hole 133 located on the top of the side light-shielding plates 103 to achieve the connection of the housing 101, the side light-shielding plates 103, and the wing plate, as well as the relative rotation between the components.

[0048] like Figure 3 As shown, a fixing post 111 is provided on the top of the side wall of the outer casing 1. A chamfered boss 112 is provided at the end of the fixing post 111. The end of the fixing post 111 is provided with an internal thread, which can be achieved, for example, by providing a hot-pressed nut 109 inside the fixing post 111.

[0049] like Figure 4 As shown, the top light shield 102 includes an upper light shield, a wing plate, and a rear connecting plate. The rear connecting plate is connected to both the upper light shield and the wing plate. The angle between the rear connecting plate and the top plate is the same as the angle formed by the top and front of the housing 101. The shape and size of the rear connecting plate can be designed according to the shape of the rear wall of the housing 101 of the projection display device, and are not limited here.

[0050] The upper light shield is rectangular and its shape should at least cover the viewing window 110 of the projection display device. After the rotating light shield is closed, the upper light shield covers the upper surface of the viewing window 110, providing dustproof and impact-resistant protection for the viewing window 110. An upwardly protruding operating part 121 is provided on the front side of the upper light shield, allowing fingers to be inserted to flip the upper light shield upwards. Multiple elastic pads 122 and 124 are provided on the inner side of the upper light shield to limit the movement of the top light shield 102, protecting the viewing window 110 and preventing damage from the light shield.

[0051] The wing plate is disposed on the side of the upper light shield 102. The wing plate includes an edge near the upper light shield, an edge away from the upper light shield, and a lower edge, the lower edge of which is opposite to the edge of the wing plate that connects with the rear connecting plate. The width of the wing plate gradually increases from the top downwards. The length of the edge of the wing plate near the upper light shield is the same as the length of the edge of the wing plate near the rear wall of the outer shell. Furthermore, the lower edge of the wing plate is either straight or an outwardly protruding arc.

[0052] A fixing post 123 is provided on the inner side of the top of the wing plate, and a chamfered boss is provided at the end of the fixing post 123; a light shield pivot 125 is provided on the outer side of the top of the wing plate. The fixing post 123 and the light shield pivot 125 are respectively provided at the same position on the wing plate. A through hole is provided in the fixing post 123 and the light shield pivot 125 for screws 107 to pass through, so as to realize the rotatable connection between the top light shield 102 and the outer shell 101.

[0053] A guide post 126 is provided near the lower edge of the wing plate to connect the top light shield 102 and the innermost side light shield 135, and to limit the rotation of the top light shield 102 relative to the innermost side light shield 135.

[0054] like Figure 5 As shown, the side light shield 103 is approximately fan-shaped. The side light shield 103 is rotatably connected to the top of the side wall of the housing 101 near its center. The side light shield 103 includes an edge near the rear wall of the housing 101, an edge near the viewing window, and a lower edge. The length of the edge of the side light shield 103 near the viewing window is the same as the length of the edge near the rear wall of the housing. The lower edge of the side light shield 103 is arc-shaped, and the distance from the lower edge of the side light shield to the rotation axis is the same as the distance from the lower edge of the wing plate to the rotation axis. Figure 2 As shown, after the light shield is fully opened, the top light shield 102 opens to the maximum rotation angle relative to the viewing window, and multiple side light shields 103 unfold between the wing plate and the outer shell 101. The wing plate and the multiple side light shields 103 together form the side light shields of the outer shell; the lower edge of the wing plate and the lower edge of the multiple side light shields 103 together form a smoothly transitioning outwardly protruding arc edge.

[0055] The top of the side light shield 103 is provided with a pivot hole 133, and the side light shield 103 is provided with a guide post 132 and a guide groove 131 near the lower edge, which are used to realize the connection and positioning of adjacent side light shields 103, the connection and positioning of the side light shield 103 and the top light shield 102, and the connection and positioning of the side light shield 103 and the outer shell 101.

[0056] like Figure 1 As shown, a plurality of side light shields 103 are respectively provided on each side wall of the outer casing 101, including: the innermost side light shield 135, the middle layer side light shields 136, 137 and the outermost side light shield 138; the innermost side light shield 135, the middle layer side light shield 136, 137 and the outermost side light shield 138 have similar shapes, and the size of each side light shield 103 can be the same or different. Accordingly, the maximum rotation angle of different side light shields can be the same or different.

[0057] like Figure 5 As shown, each side light shield 103 has a guide groove 131 and a positioning hole 132 near its lower edge. The guide groove of the innermost side light shield 135 cooperates with the guide post 126 located near the lower edge of the wing plate to achieve connection and relative rotation between the two. The guide grooves and guide posts of the side light shields 103 of adjacent layers cooperate with each other and can be connected and rotated relative to each other by a fastener 106 passing through the positioning hole 132 and the guide groove 131. The fastener 106 can slide within the guide groove 131, thus the fastener 106 is used as a guide post.

[0058] In this embodiment, the wing of the top light-shielding plate 102 can rotate relative to the innermost side light-shielding plate 135. In other embodiments, the wing and the innermost side light-shielding plate 135 can be fixedly connected, and during the folding and unfolding of the light shield, only the multiple side light-shielding plates 103 change their unfolded and folded state, while the relative position of the wing and the innermost side light-shielding plate 135 remains unchanged.

[0059] Similarly, in this embodiment, the outermost side light shield 138 is fixedly connected to the outer shell 101 by a fixing post 114 disposed on the outer shell 101, and a fixing member 105 passing through the positioning hole 132 of the outermost side light shield 138 and the fixing post 114. During the folding and unfolding of the light shield, there is no relative positional change between the outermost side light shield 138 and the outer shell 101; only other side light shields 103 are inserted between the outermost side light shield 138 and the outer shell 101. In other embodiments not shown, the outermost side light shield 138 can rotate relative to the outer shell through the structure of guide posts and guide grooves, which is not limited here.

[0060] The following is combined with Figure 6 and Figure 7 The rotatable connection between the top light-shielding plate 102, the multiple side light-shielding plates 103, and the outer casing 101 is described. A fixing post 111 is provided on the top of the side wall of the outer casing 101. The end of the fixing post 111 has a chamfered boss 112 and an internal thread, which can be achieved, for example, by heat-pressing a nut 109 inside the fixing post 111. A fixing post 123 is provided on the inner side of the top of the wing plate. The end of the fixing post 123 has a chamfered boss, and a light-shielding hinge 125 is provided on the outer side of the top of the wing plate. The fixing post 123 and the light-shielding hinge 125 are correspondingly located at the same position on the wing plate. A hinge hole 133 is provided on the top of the multiple side light-shielding plates 103. A spring 108 and a pair of friction plates 104 are fitted onto the fixed posts 123 and 111. The friction surfaces 141 of the two friction plates 104 are arranged opposite each other, and the spring 108 abuts between the wing plate and the friction plate 104. A chamfered hole 142 is provided in the center of the friction plate 104. The chamfered hole 142 of one friction plate 104 is fitted onto the chamfered boss 112, and the chamfered hole of the other friction plate 104 is fitted onto the chamfered boss of the fixed post 123. Multiple side shields 103 are fitted onto the outside of the sunshade shaft 125 through the pivot hole 133. Screws 107 pass through the through holes in the center of the sunshade shaft 125 and the fixed post 123, extend into the interior of the fixed post 111, and are screwed into the internal thread of the fixed post 111 (i.e., the internal thread of the heat-pressed nut 109), thereby realizing the installation of multiple side sunshades 103 and top mounting plate 102 on the top of the side wall of the housing 101. During the rotation of the sunshade, the two friction plates 104 rotate relative to each other to provide damping, thereby suspending the sunshade at any rotational position.

[0061] The opening and folding processes of the rotating sunshade are described in detail below. The opening and folding of the rotating sunshade are achieved by a first guide structure disposed between the side sunshade plates 103 of adjacent layers, a second guide structure disposed between the side wall of the outer shell 101 and the side sunshade plate (outermost side sunshade plate 138) adjacent to the outer shell 101, and a third guide structure disposed between the side sunshade plate (innermost side sunshade plate 135) adjacent to the wing plate and the wing plate.

[0062] The first guide structure limits the maximum rotation angle between two adjacent side light-shielding plates 103; the second guide structure limits the maximum rotation angle of the outermost side light-shielding plate 138 relative to the outer shell 101; and the third guide structure limits the maximum rotation angle of the wing plate relative to the innermost side light-shielding plate 135. The maximum rotation angle of the outermost side light-shielding plate 138 relative to the outer shell 101, the maximum rotation angle between two adjacent side light-shielding plates 103, and the maximum rotation angle of the top light-shielding plate 102 relative to the innermost side light-shielding plate 135 are all between 15 and 45 degrees. These three maximum rotation angles can be the same or different.

[0063] In this embodiment, the first guide structure, the second guide structure, and the third guide structure are all implemented using guide posts and arc-shaped guide grooves. To simplify the design of the side sunshade and ensure the aesthetics of the sunshade after folding, the structures of multiple guide grooves can be identical, thereby making the maximum rotation angle of the outermost side sunshade 138 relative to the outer shell 101, the maximum rotation angle between two adjacent side sunshades, and the maximum rotation angle of the top sunshade relative to the innermost side sunshade 135 the same.

[0064] The folded state of the rotating sunshade is as follows Figure 1 As shown, at this time, the wing plate and multiple side light shields 103 overlap with the side wall of the outer shell 101, and the upper light shield covers the viewing window 110, which has a protective effect on the viewing window.

[0065] like Figure 2 As shown, during the opening of the rotating light shield, the top light shield 102 and the multiple side light shields 103 rotate upwards respectively. The rotation of the top light shield 102 and the multiple side light shields 103 can be performed simultaneously or sequentially, without limitation.

[0066] As a typical embodiment, when the rotating light shield is fully opened, the top light shield 102 can be rotated upward to a first position relative to the innermost side light shield 135. Among the multiple side light shields, the inner side light shield can be rotated upward to a second position relative to the outer side light shield, and the outermost side light shield 138 can be rotated upward to a third position relative to the outer shell 101. These three positions all correspond to the guide post sliding to the upper end of the guide groove.

[0067] When the rotating sunshade is fully opened, the maximum angle between the upper sunshade and the viewing window 10 is equal to the maximum rotation angle of the outermost side sunshade 138 relative to the outer shell 101, the maximum rotation angle of the innermost side sunshade 135 relative to the outermost side sunshade 138 (equal to the sum of the maximum rotation angles between multiple adjacent side sunshades), and the maximum rotation angle of the top sunshade 102 relative to the innermost side sunshade 135. Of these three rotation angles, except for the maximum rotation angle of the innermost side sunshade 135 relative to the outermost side sunshade 138 which is not zero, the other two angles can be zero depending on the installation method between the side sunshade 103 and the outer shell and wing plates. The maximum angle between the upper sunshade and the viewing window 110 is not less than 60 degrees and does not exceed 155 degrees.

[0068] Because of the use of multiple side light shields 103, the top light shield can be opened to a position parallel to the rear wall of the housing 101. At this position, the rotating light shield does not block the light from the viewing window 110. Depending on actual needs, the light shield can be opened to any angle between 0 degrees and the aforementioned maximum angle, thereby flexibly adjusting the opening degree of the rotating light shield.

[0069] During the folding (i.e. closing) process of the rotating sunshade, the top sunshade 102 is pushed downwards, and the rotation of the top sunshade 102 will cause multiple side sunshades 103 to rotate downwards relative to the outer shell 101 together, thus folding the rotating sunshade.

[0070] The top light shield 102 can be rotated downward to the fourth position relative to the innermost side light shield 135. Among the two adjacent side light shields, the inner side light shield can be rotated downward to the fifth position relative to the outer side light shield, and the outermost side light shield 138 can be rotated downward to the sixth position relative to the outer shell 101. These three positions correspond to the guide post sliding to the lower end of the guide groove.

[0071] The aforementioned rotating light shield opens and closes the top and side light shields in a linked manner, making it convenient to open and close. Furthermore, when not in use, the light shield can be folded to reduce the size of the projection display device and facilitate storage.

[0072] Second Embodiment

[0073] like Figures 8 to 11As shown, the telephoto display device with a rotating light shield provided by this utility model includes a housing 201, a viewing window 210 on the front of the housing 201, and side walls and a rear wall. Similar to the first embodiment, this telephoto display device has an optical magnification system inside the housing 1. Through the optical magnification system, the image on the display screen is magnified and projected to a distance, and presented through the viewing window 210. The user, positioned at the exit pupil in front of the beam splitter, can view a magnified virtual image at least 3 meters away and at least 30 inches in size, enabling the user to continuously view distant objects during use.

[0074] The aforementioned projection display device has a rotating light shield to block ambient light directed towards the viewing window 210, thereby reducing reflected stray light and glare. For example... Figure 8 and Figure 9 As shown, this rotating sunshade can be folded when not in use, saving space, and, as Figure 10 and Figure 11 The rotating sunshade can be opened during use to block strong light from shining on the viewing window 210 from the top and sides. Furthermore, preferably, the rotating sunshade can cover the viewing window 210 when folded, thus protecting the viewing window 210.

[0075] The structure of the light shield used in the second embodiment is different from that in the first embodiment. The difference is that only one side light shield 203 is provided on the same side wall of the outer shell 201.

[0076] Specifically, such as Figure 9 As shown, the rotating light shield includes a top light shield 202 and two side light shields 203. The top light shield 202 includes an upper light shield 220 and two wing plates 221. The tops of the two wing plates 221 are rotatably connected to the tops of the two side walls of the housing 201, respectively, so that the top light shield 202 can rotate toward or away from the viewing window 210. The tops of the two side light shields 203 are rotatably connected to the tops of the two side walls of the housing 201, and the rotation direction of the side light shields 203 is the same as that of the top light shield.

[0077] like Figure 12As shown, a wing plate 221 and a side light-shielding plate 203, located on the same side of the housing 201, are mounted on the top of the side wall of the housing 201 via the same connector (e.g., a fixing shaft 204). The side light-shielding plate 203 is located between the housing 201 and the wing plate 221. A mounting hole 224 is provided on the top of the wing plate 221, and a mounting hole 231 is provided on the top of the side light-shielding plate 203. The fixing shaft passes through the mounting holes 224 and 231 in sequence and is fixed to the top of the side wall of the housing 201, thereby mounting the top light-shielding plate 202 and the side light-shielding plate 203 onto the housing 201. The wing plate 221 and the side light-shielding plate 203, located on the same side wall of the housing 201, rotate around the same rotation axis (i.e., the fixing shaft 204). In other embodiments, the side light-shielding plate 203 may also be located on the outside of the housing 201 and the wing plate 221.

[0078] like Figure 13 As shown, the top light shield 202 includes an upper light shield 220, a wing 221, and a rear connecting plate 222. The rear connecting plate 222 is connected to both the upper light shield 220 and the wing 221. The angle between the rear connecting plate 222 and the top plate 220 is the same as the angle formed by the top and front of the outer shell 201.

[0079] The upper light shield 220 is rectangular, and its shape should at least cover the viewing window 210 of the projection display device. After the rotating light shield is closed, the upper light shield 220 covers the viewing window 210, providing protection against dust and impact. Multiple elastic pads 223 are provided on the inner side of the upper light shield 220 to protect the viewing window 210 and prevent damage from the light shield.

[0080] The wing plate 221 is disposed on the side of the upper light shield 220 and has an irregular shape. The wing plate 221 includes an edge 226 near the upper light shield 220, an edge 227 away from the upper light shield 220, and a lower edge 228 connected to the edges 226 and 227. The lower edge 228 is opposite to the edges of the wing plate 221 that connect to the rear connecting plate 222. The width of the wing plate 221 gradually increases from the top downwards. The length of the edge 226 of the wing plate 221 near the upper light shield 220 is greater than the length of the edge 227 of the wing plate 221 near the rear wall of the outer casing 201. Furthermore, the lower edge 228 of the wing plate 221 is an arc shape that is concave towards the top.

[0081] like Figure 14 and Figure 15As shown, the side light shield 203 is approximately triangular in shape. The side light shield 203 includes an edge 234 near the rear wall of the housing 201, an edge 235 near the window, and a lower edge 236. The length of the edge 235 of the side light shield 203 near the window is less than the length of the edge 234 near the rear wall of the housing. The length of the edge 235 of the side light shield 203 near the window is the same as or close to the length of the edge 227 of the wing 221 near the rear wall of the housing. Figure 11 As shown, when the sunshade is fully opened, the wing plate 221 and the side sunshade 202 together form the side sunshade of the shell; the lower edge 228 of the wing plate 221 and the lower edge 236 of the side sunshade 203 together form a smoothly transitioned concave arc-shaped opening. After the sunshade is rotated upwards and opened, the shape of the side sunshade can meet the needs of top and side shading while not affecting the user's horizontal field of vision and reducing the feeling of lateral pressure.

[0082] like Figure 12 As shown, a third guide structure is provided on the inner side of the wing plate 221, such as... Figure 13 As shown, a corresponding third guide structure is provided on the outer surface of the side light shield 203 to realize the relative rotation of the wing plate 221 and the side light shield 203 within a certain angle range, and to guide and limit the movement. The wing plate 221 and the side light shield 203 can rotate around the fixed axis 204, and the wing plate 221 can rotate relative to the side light shield 203 by a certain angle. The maximum rotation angle of the top light shield 202 relative to the side light shield 203 is between 25 degrees and 45 degrees.

[0083] like Figure 15 As shown, a second guide structure is provided on the inner side of the side light shield 203, such as... Figure 16 As shown, a corresponding second guide structure is provided on the side wall of the outer casing 201 to realize the relative rotation of the side light shield 203 and the outer casing 201 within a certain angle range, and to provide guidance and limiting functions. The side light shield 203 can rotate relative to the outer casing 201 around the fixed axis 204 at a certain angle. The maximum rotation angle of the side light shield 203 relative to the outer casing 201 is between 25 degrees and 45 degrees. The maximum rotation angle of the side light shield 203 relative to the outer casing 201 and the maximum rotation angle of the top light shield 202 relative to the side light shield 203 can be the same or different.

[0084] To avoid interference between the two guide structures on the side shading plate 203 in the vertical direction, the guide structures on the inner and outer sides of the side shading plate 203 are staggered in the height direction.

[0085] The following is combined Figures 12 to 16The structure shown describes in detail the opening and folding processes of the rotating sunshade. The opening and folding of the rotating sunshade are achieved through guide structures provided between the side wall of the outer shell 201 and the side sunshade 203, and guide structures provided between the side sunshade 203 and the wing plate 221.

[0086] Specifically, the outer surface of the side light shield 203 and the inner surface of the wing plate 221 are respectively provided with an arc-shaped first guide groove and a first guide member, the first guide member being confined within the first guide groove; the length of the first guide groove limits the rotation angle of the top light shield 202 relative to the side light shield 203. The side wall of the outer shell 201 and the inner surface of the side light shield 203 are respectively provided with an arc-shaped second guide groove and a second guide member, the second guide member being confined within the second guide groove; the length of the second guide groove limits the rotation angle of the side light shield 203 relative to the outer shell 201.

[0087] In the illustrated embodiment, the first guide groove and the first guide member are implemented by a sliding groove 232 disposed on the outer side of the side light shield 203 and a guide post 224 disposed on the inner side of the wing plate 221. The guide post 224 can only slide inside the sliding groove 232. The two ends of the sliding groove 232 define the rotation angle of the top light shield 202 relative to the side light shield 203. The left end 232A of the sliding groove 232 corresponds to the third position of the top light shield 202 rotating downward, and the right end 232B of the sliding groove 232 corresponds to the first position of the top light shield 202 rotating upward. The first guide groove and the first guide member can also be implemented in other forms, or the positions of the first guide groove and the first guide member can be interchanged. Here, the specific implementation of the first guide groove and the first guide member is not limited.

[0088] The second guide groove and the second guide member are implemented by a slide rail 211 disposed on the side wall of the housing 201 and a sliding piece 233 disposed on the inner side of the side light shield 203. The sliding piece 233 can only slide inside the slide rail 211. The two ends of the slide rail 211 define the rotation angle of the side light shield 203 relative to the housing 201. Specifically, the left end 211A of the slide rail 211 corresponds to the fourth position of the side light shield 203 rotating downward, and the right end 211B of the slide rail 211 corresponds to the second position of the side light shield 203 rotating upward. The second guide groove and the second guide member can also be implemented in other forms, or the positions of the second guide groove and the second guide member can be interchanged. For example, the slide rail can be disposed on the side light shield, and the sliding piece can be disposed on the housing. Here, the specific implementation of the second guide groove and the second guide member is not limited.

[0089] In this embodiment, the third guide structure and the second guide structure are disposed at different heights on the side wall of the projection display device, and the distance from the first guide groove to the rotating shaft is different from the distance from the second guide groove to the rotating shaft.

[0090] The folded state of the rotating sunshade is as follows Figure 8 As shown, at this time, the wing plate 221 and the side light shield 203 set on the same side wall of the outer shell overlap with the side wall of the outer shell 201, and the upper light shield 220 covers the viewing window 210, which has a protective effect on the viewing window.

[0091] During the opening of the rotating sunshade, the top sunshade 202 and the side sunshade 203 rotate upwards respectively. The top sunshade 202 can rotate upwards to a first position relative to the side sunshade 203 (corresponding to the guide post 224 sliding to the right end 232B of the slide groove 232), and the side sunshade 203 can rotate upwards to a second position relative to the outer shell 201 (corresponding to the slider 233 sliding to the right end 211B of the slide rail 211).

[0092] When the top light shield 202 is lifted upwards, it can cause the side light shield 203 to rotate relative to the outer casing at different angles. Alternatively, after the top light shield 202 has rotated upwards to the first position, it can continue to rotate, causing the side light shield 203 to rotate upwards relative to the outer casing 201, thus opening the rotating light shield. The maximum open position of the light shield corresponds to the top light shield 202 rotating upwards relative to the side light shield 203 to the first position and the side light shield 203 rotating upwards relative to the outer casing 201 to the second position, that is, corresponding to the guide post 224 sliding to the right end 232B of the slide groove 232 and the slide piece 233 sliding to the right end 211B of the slide rail 211.

[0093] When the rotating sunshade is fully opened, the maximum angle between the upper sunshade 220 and the viewing window 210 is equal to the sum of the maximum rotation angle of the side sunshade 203 relative to the outer shell 201 and the maximum rotation angle of the top sunshade 202 relative to the side sunshade 203. The maximum value of this sum is not less than 60 degrees and does not exceed 90 degrees. Depending on actual needs, the sunshade can be opened to any angle between 0 degrees and the aforementioned maximum angle, thus flexibly adjusting the opening degree of the rotating sunshade.

[0094] During the folding process (i.e., closing process) of the rotating sunshade, the top sunshade 202 can be rotated downward to a third position relative to the side sunshade 203 (corresponding to the guide post 224 sliding to the left end 232A of the slide groove 232); the side sunshade 203 can be rotated downward to a fourth position relative to the outer shell 201 (corresponding to the slide piece 233 sliding to the left end 211A of the slide rail 211).

[0095] Pushing the top light shield 202 downwards causes the side light shield 203 to rotate downwards at different angles. Alternatively, after the top light shield 202 has rotated downwards to the third position, pushing it further causes the side light shield 203 to rotate downwards relative to the outer shell 201, thus folding the rotating light shield. The final folded state of the light shield corresponds to the top light shield 202 rotating downwards relative to the side light shield 203 to the third position and the side light shield 203 rotating downwards relative to the outer shell 201 to the fourth position, that is, corresponding to the guide post 224 sliding to the left end 232A of the slide groove 232 and the slide piece 233 sliding to the left end 211A of the slide rail 211.

[0096] The opening and closing of the top and side light shields is achieved through a linkage mechanism, making them convenient to open and close. Furthermore, when not in use, the light shields can be folded to reduce the size of the projection display device and facilitate storage.

[0097] To avoid obstructing the buttons on the sidewall of the housing 201 and to achieve a neat appearance, in the preferred embodiment described above, the wing plate 221 and the side light shield 203 can each be made of stepped thin sheets. For example, Figure 13 and Figure 15 As shown, the upper part 221A and the lower part 221B of the wing plate 221 are stepped with the upper part closer to the inside; the upper part 230A and the lower part 230B of the side shading plate 203 are also stepped with the upper part closer to the inside.

[0098] In addition to using a rigid light-shielding plate as shown in the figure, a flexible foldable light-shielding plate can also be used in the above-mentioned rotating light-shielding hood. For example, only the edge of the rigid light-shielding plate is retained as a frame, and a flexible material is used to cover it to form a plate-shaped light-shielding structure. During the folding process, only the folding of multiple frames needs to be designed. The flexible material will fold along with the folding of the frames, which can also realize the switching between the folded and open states of the light-shielding hood. This will not be described in detail here.

[0099] In summary, the aforementioned projection display device features a rotating light shield, which includes a top light shield and two side light shields. The top light shield includes an upper light shield and two wing plates, the tops of which are rotatably connected to the tops of the outer casing sidewalls. The tops of the side light shields are also rotatably connected to the tops of the outer casing sidewalls. The wing plates and side light shields, located on the same sidewall of the outer casing, rotate around the same axis of rotation. The top light shield can rotate upwards relative to the side light shields to a first position. The side light shields can rotate upwards relative to the outer casing to a second position. When the rotating light shield is fully opened, the maximum angle between the upper light shield and the viewing window is equal to the sum of the maximum rotation angle of the side light shields relative to the outer casing and the maximum rotation angle of the top light shield relative to the side light shields. When the rotating light shield is closed, the wing plates and side light shields overlap with the sidewalls of the outer casing. When not in use, the light shield of the aforementioned projection display device can be folded, saving space and facilitating storage.

[0100] The foregoing has provided a detailed description of the projection display device with a rotating light shield provided by this utility model. Any obvious modifications made by those skilled in the art without departing from the essential content of this utility model will constitute an infringement of the patent rights of this utility model and will incur corresponding legal liability.

Claims

1. A projection display device with a rotating light shield, comprising a housing, wherein a viewing window is provided on the front side of the housing, characterized in that: The rotating light shield includes a top light shield and multiple side light shields; The top light shield includes an upper light shield and two wing plates. The tops of the two wing plates are rotatably connected to the tops of the two side walls of the housing, so that the top light shield can rotate toward or away from the viewing window. Multiple side light shields are respectively disposed on two side walls of the housing. The top of the side light shields is rotatably connected to the top of the side wall of the housing, and the rotation direction of the side light shields is the same as that of the top light shield. The wing plate and the side light shield, which are disposed on the same side wall of the outer shell, rotate about the same rotation axis. After the rotating light shield is opened, the top light shield rotates relative to the window. The side light shield connects the wing plate and the side wall of the housing. The wing plate and the side light shield, which are set on the same side wall of the housing, form the side light shield of the rotating light shield. After the rotating light shield is closed, the wing plate and the side light shield, which are located on the same side wall of the outer shell, overlap with the side wall of the outer shell.

2. The projection display device as described in claim 1, characterized in that: The wing plate and the side light shield are provided on the same side wall of the outer casing; The maximum rotation angle of the side light shield relative to the outer shell is between 25 degrees and 45 degrees; The maximum rotation angle of the top light shield relative to the side light shield is between 25 degrees and 45 degrees.

3. The projection display device as described in claim 1, characterized in that: The wing plate and multiple side shading plates are provided on the same side wall of the outer shell; the maximum rotation angle of the top shading plate relative to the viewing window is not less than 60 degrees and not more than 155 degrees.

4. The projection display device as described in claim 3, characterized in that: The maximum rotation angle between two adjacent side shields is between 15 and 45 degrees.

5. The projection display device as described in claim 1, characterized in that: On the same side of the housing, the wing plate and at least one side light shield are connected to the side wall of the housing via the same connector, the at least one side light shield being located between the housing and the wing plate, or the at least one side light shield being located outside the housing and the wing plate.

6. The projection display device as described in claim 5, characterized in that: A first guide structure is provided between two adjacent side shading plates, and the first guide structure limits the maximum rotation angle between the two adjacent side shading plates.

7. The projection display device as described in claim 5, characterized in that: A second guide structure is provided between the side wall of the housing and the side light shield adjacent to the housing, the second guide structure limiting the maximum rotation angle of the side light shield adjacent to the housing relative to the housing; and / or, A third guide structure is provided between the wing plate and the side shading plate adjacent to the wing plate; the third guide structure limits the maximum rotation angle of the wing plate relative to the side shading plate adjacent to the wing plate.

8. The projection display device as described in claim 1, characterized in that: The shape of the upper light shield at least covers the viewing window of the projection display device.

9. The projection display device as described in claim 1, characterized in that: In the open state, the lower edges of the wing plate and the lower edge of the side shading plate, which are located on the same side wall, form an arc shape that protrudes towards the bottom.

10. The projection display device as described in claim 1, characterized in that: In the open state, the lower edge of the side shading plate and the lower edge of the wing plate, which are located on the same side wall, form an arc that is recessed towards the top.

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