Far projection display device with light shield

Abstract

The utility model discloses a remote projection display device with a light shield, comprising a housing, the front surface of which is provided with a window; a light shielding cover is arranged outside the shell and comprises a top light shielding plate; the top shading plate comprises an upper shading plate and two wing plates fixedly connected with the upper shading plate; the shape of the upper shading plate at least covers a window of the remote projection display device; the two wing plates are movably connected with the tops of the two side walls of the shell respectively, so that the position of the top shading plate relative to the shell can be changed, and the shading state of the shading cover is changed. According to the remote projection display device, the light shield is movably connected with the top of the side wall of the shell, the position of the light shield relative to the shell can be adjusted, the light shielding state of the light shield is adjustable, and the device is suitable for different light environments.

Description

Technical Field

[0001] This utility model relates to a projection display device, and more particularly to a projection display device with a 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 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 light shield includes a housing, a viewing window on the front of the housing, and a light shield on the outside of the housing; the light shield includes a top light shield plate.

[0007] The top light-shielding plate includes an upper light-shielding plate and two wing plates fixedly connected to the upper light-shielding plate;

[0008] The shape of the upper light-shielding plate at least covers the viewing window of the projection display device;

[0009] The two wing plates are respectively movably connected to the top of the two side walls of the housing, so that the position of the top light shield relative to the housing can be changed, thereby changing the light shielding state of the light shield.

[0010] Preferably, the top of the wing plate is rotatably connected to the top of the side wall of the housing, so that the top light shield can rotate toward or away from the viewing window.

[0011] Preferably, the wing plate is provided with a groove, and a sliding member is provided on the top of the side wall of the outer shell. The sliding member is confined within the groove so that the wing plate can slide relative to the outer shell.

[0012] Preferably, the projection display device further includes a fixing member for fixing the wing plate to the outer shell. Loosening the fixing member allows the position of the light shield to be adjusted, while tightening the fixing member fixes the position of the light shield.

[0013] Preferably, a first fixing post is provided on the top of the outer shell, and a fixing hole is provided inside the first fixing post; a second fixing post is provided on the inner side of the wing plate, and a through hole is provided inside the second fixing post; the fixing member passes through the second fixing post and then passes through the fixing hole of the first fixing post.

[0014] Preferably, the light shield further includes a plurality of side light shields, which are rotatably connected to the top of the two side walls of the housing respectively; when the light shield is opened, one or more of the side light shields unfold between the side walls of the housing and the wing plates; when the light shield is closed, the plurality of side light shields and the wing plates overlap with the side walls of the housing respectively.

[0015] Preferably, the top of the outer shell is provided with a first fixing post, and the first fixing post has an internal thread; the inner side of the wing plate is provided with a second fixing post, and the outer side of the wing plate is provided with a rotating shaft. The second fixing post and the rotating shaft are provided at corresponding positions on both sides of the wing plate, and have through holes penetrating the wing plate; the fixing member passes through the rotating shaft and the second fixing post and is fixedly connected to the first fixing post; the side light shield is provided with a rotating shaft hole; the side light shield is mounted on the rotating shaft of the wing plate through the rotating shaft hole.

[0016] Preferably, the first fixing post has a chamfered boss at its end, and the second fixing post has a chamfered boss at its end; two friction plates are sleeved on the first and second fixing posts, the friction surfaces of the two friction plates are arranged opposite each other, and the chamfered holes of the two friction plates are correspondingly arranged on the chamfered bosses of the first and second fixing posts; an elastic element is provided between the wing plate and the friction plates.

[0017] Preferably, the width of the wing plate gradually increases from the top downwards.

[0018] Preferably, the light shield is made of a rigid material, or the light shield is a combination of rigid and flexible materials.

[0019] Preferably, the lower edge of the light shield is an arc shape that protrudes to the bottom or is recessed to the top.

[0020] Preferably, the light shield further includes a rear connecting plate, the three sides of which are connected to the upper light shield and the two wing plates, respectively.

[0021] The present invention discloses a projection display device, including a housing with a viewing window on the front; a light shield is provided on the outside of the housing, wherein the light shield is movably connected to the top of the side wall of the housing, and the position of the light shield relative to the housing can be adjusted so that the light shielding state of the light shield is adjustable and suitable for use in different lighting environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the projection display device provided in the first embodiment when the light shield is closed;

[0023] Figure 2 This is a schematic diagram of the projection display device provided in the first embodiment;

[0024] Figure 3 This is a schematic diagram of the structure of the light shield provided in the first embodiment;

[0025] Figure 4 This is a schematic diagram of the connection structure between the light shield and the outer shell in the first embodiment;

[0026] Figure 5 and Figure 6 These are schematic diagrams of the projection display device in the first embodiment, showing the device with the light shield in different positions.

[0027] Figure 7 This is a schematic diagram of the projection display device provided in the second embodiment when the light shield is closed;

[0028] Figure 8 This is a schematic diagram of the projection display device when the light shield is open, according to the second embodiment.

[0029] Figure 9 This is a schematic diagram of the projection display device provided in the second embodiment;

[0030] Figure 10 This is a schematic diagram of the top light-shielding plate provided in the second embodiment;

[0031] Figure 11 This is a schematic diagram of the side light-shielding plate provided in the second embodiment;

[0032] Figure 12 This is a schematic diagram of the connection structure between the light shield and the outer shell in the second embodiment;

[0033] Figure 13 This is a schematic diagram of the friction plate provided in the second embodiment. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the projection display device with a light shield provided by this utility model includes a housing 1, a viewing window 10 on the front of the housing 1, and side walls and a rear wall. Inside the housing 1, a display screen, a beam splitter, and a curved reflector are arranged. The display screen faces the beam splitter, and the beam splitter and the curved reflector are arranged opposite each other, with the beam splitter positioned close to the viewing window 10. 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. Then, at least a portion of the light passes through the beam splitter and through the viewing window 10, projecting an image onto the exit pupil. This projection display device magnifies and projects the image on the display screen through an optical magnification system, presenting it through the viewing window 10. 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 the user to continuously view distant objects during use.

[0038] The aforementioned projection display device has a light shield on the outside of the housing 1; the light shield is used to block ambient light directed towards the viewing window 10 to reduce reflected stray light and glare. For example... Figure 1 As shown, the light shield can be closed when not in use, saving space, and, as Figure 2 As shown, the light shield can be opened during use to block strong light from the top and sides of the viewing window 10. Furthermore, preferably, the light shield can cover the viewing window 10 when closed, thus protecting it.

[0039] In this projection display device, the light shield can be a one-piece light shield or a foldable light shield. For example... Figure 1 As shown, when using an integrated light shield, the light shield only includes a top light shield 2. The top light shield 2 includes an upper light shield and two wing plates fixedly connected to the upper light shield. The shape of the upper light shield at least covers the viewing window 10 of the projection display device. The light shield can rotate relative to the viewing window 10 as a whole in a direction away from or close to the viewing window, or the light shield can slide relative to the housing 1 while rotating relative to the viewing window. Figure 7 As shown, when using the foldable light shield, the light shield includes a top light shield 2 and a side light shield 3. The top light shield 2 includes an upper light shield and a wing plate. The top light shield 2 can rotate relative to the viewing window 10 in a direction away from or close to the viewing window. The wing plate of the top light shield 2 and the side light shield 3 can switch between a folded state and an unfolded state. The foldable light shield has a better light-blocking effect on ambient light shining on the viewing window 10 from the side.

[0040] Regardless of the type of light shield used, the two wings of the top light shield 2 are movably connected to the top of the two side walls 13 of the outer casing 1, respectively, so that the position of the top light shield 2 relative to the outer casing 1 can be changed, thereby changing the light shielding state of the light shield. For example, the top of the wing is rotatably connected to the top of the side wall 13 of the outer casing 1, so that the top light shield 2 can rotate towards or away from the viewing window 10. Alternatively, the wing is provided with a groove, and the top of the side wall 13 of the outer casing 1 is provided with a sliding member, which is confined within the groove, so that the top light shield 2 can slide relative to the outer casing.

[0041] The following describes the structure of different light shields and the connection method between the light shield and the outer shell using two different embodiments as examples.

[0042] First Embodiment

[0043] The projection display device provided in this embodiment uses an integrated light shield, the structure of which is as follows: Figure 3As shown. The light shield includes only the top light shield 2, which includes an upper light shield and two wing plates fixedly connected to it. The upper light shield is rectangular and its shape at least covers the viewing window of the projection display device. The wing plates are disposed on both sides of the upper light shield, and the width of the wing plates gradually increases from the top downwards. The lengths of the edges of the wing plates near and away from the upper light shield can be equal or different. In this embodiment, the length of the edge of the wing plate near the rear wall is less than the length of the edge connecting the wing plate to the upper connecting plate. The lower edge of the wing plate is an arc that is concave towards the top, thereby reducing the obstruction of the top light shield to the horizontal field of view of the human eye. The wing plates are provided with sliding grooves extending from the top to the bottom, which are used to cooperate with the positioning posts (i.e., sliding members) provided on the side wall 13 of the housing 1 to realize the sliding and rotation of the top light shield 2 relative to the housing 1. The light shield can rotate relative to the viewing window 10 as a whole in a direction away from or near the viewing window, and the light shield can slide relative to the housing 1 while rotating relative to the viewing window.

[0044] In this embodiment, such as Figures 2 to 4 As shown, a first fixing post 11 is provided at the top of the side wall of the outer shell 1, and a boss 12 is provided at the end of the first fixing post 11; a sliding groove 23 extending from the top to the bottom is provided on the wing plate of the top light shield 2, and the sliding groove 23 runs through the thickness direction of the wing plate; the boss 12 of the first fixing post 11 extends into the sliding groove 23 and is restricted to sliding inside the sliding groove 23; a fixing hole is also provided inside the first fixing post 11, and an internal thread is machined on the inner wall of the fixing hole, or it can be achieved by setting a hot-pressed nut 5 in the fixing hole; the fixing member 7 passes through the sliding groove 23 of the wing plate, extends into the first fixing post 11, and is screwed to the hot-pressed nut 5; preferably, an elastic member 6 is provided between the fixing member 7 and the wing plate, and the elastic member 6 can be an O-ring or a washer. When it is necessary to adjust the position of the light shield, the fixing member 7 is turned to loosen the fixing member 7, and after the light shield is adjusted to a suitable position, the fixing member 7 is tightened; the fixing member 7 can be a screw or other connecting member with external threads.

[0045] Figure 5 and Figure 6 These are schematic diagrams of the projection display device when the light shield is adjusted to different positions. (The diagrams show the structure of the device with the light shield adjusted to different positions.) Figure 1 The closed state shown, Figure 5 The light shield in the middle rotated relative to window 10. Figure 6 The light shield rotates relative to the viewing window 10 while also sliding backward, thereby adjusting the extension length of the light shield in front of the housing 1.

[0046] As a preferred embodiment, such as Figure 3As shown, a front limiting part 22 and a rear limiting part 24 are provided inside the top light shield 2 to limit the maximum rotation angle of the top light shield 2 when it rotates toward the viewing window 10. The front limiting part 22 and the rear limiting part 24 can be elastic elements such as rubber pads, which have a buffering effect while limiting the rotation, and are used to protect the viewing window.

[0047] An operating part 21 is provided at the lower part of the top light-shielding plate 2, that is, at the lower edge of the upper light-shielding plate, such as... Figure 3 The operating part 21 shown is a protrusion with space for accommodating fingers, which facilitates the insertion of fingers between the top light shield 2 and the viewing window 10, and the upward rotation of the top light shield 2.

[0048] At the top of the top light shield 2, or at the rear, there is a rear connecting plate. The three sides of the rear connecting plate are connected to the upper light shield and the two wing plates respectively. The shape of the other side of the rear connecting plate can be determined according to the shape of the rear wall of the outer shell 1. In this way, when the top light shield 2 is flipped up to a state parallel to the rear wall, the top light shield 2 can be slid down to the rear side of the outer shell 1, so that the light shield can be stored when the ambient light is not too strong and there is no need to block the light.

[0049] Second Embodiment

[0050] like Figure 7 and Figure 8 As shown, in this embodiment, the projection display device uses a foldable light shield. The light shield includes a top light shield 2 and multiple side light shields 3. The top light shield 2 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 13 of the housing 1, respectively, so that the top light shield 2 can rotate towards or away from the viewing window 10. One or more side light shields 3 are provided on each side wall of the housing 1. The tops of the side light shields 3 are rotatably connected to the tops of the side walls of the housing 1, and the rotation direction of the side light shields 3 is the same as that of the top light shield 2. The rotation direction is the same; the wing plate and the side light shield 3 disposed on the same side wall of the outer shell 1 rotate around the same rotation axis; after the light shield is opened, the wing plate rotates relative to the outer shell 1, and the side light shield 3 unfolds between the wing plate and the outer shell 1, and the wing plate and the multiple side light shields 3 disposed on the same side wall of the outer shell 1 form the side light shielding part of the light shield; after the light shield is closed, the wing plate and the side light shield 3 disposed on the same side wall of the outer shell 1 coincide with the side wall of the outer shell 1 respectively.

[0051] The following section takes a light shield with multiple side light shields 3 on a single side wall of the outer shell 1 as an example to further introduce the connection structure between the outer shell 1 and the light shield.

[0052] like Figure 1 and Figure 8As shown, in this embodiment, a plurality of side light shields 3 are provided on each side wall of the housing 1, including: the innermost side light shield 35, one or more intermediate side light shields 36, 37 and the outermost side light shield 38.

[0053] A wing plate and multiple side light-shielding plates 3, located on the same side of the outer casing 1, are mounted on the top of the side wall of the outer casing 1 via a common connector. The multiple side light-shielding plates 3 are located on the outer sides of the outer casing 1 and the wing plate. It is understood that the multiple side light-shielding plates 3 can also be located between the outer casing 1 and the wing plate. The connector can be a combination of screws 7, compression springs 8, and friction plates 4, which, in conjunction with a first fixing post 11 located on the top of the side wall of the outer casing 1, a light-shielding shaft 25 and a second fixing post 27 located on the top of the wing plate, and a shaft hole 33 located on the top of the side light-shielding plate 3, achieve the connection of the outer casing, the side light-shielding plates, and the wing plate, as well as the relative rotation between the components.

[0054] like Figure 9 As shown, a first fixing post 11 is provided on the top of the side wall of the outer casing 1. A chamfered boss 15 is provided at the end of the first fixing post 11. An internal thread is provided at the end of the first fixing post 11. For example, this can be achieved by providing a hot-pressed nut 9 inside the first fixing post 11.

[0055] like Figure 10 As shown, the top light shield 2 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 1. The shape and size of the rear connecting plate can be designed according to the shape of the rear wall of the housing 1 of the projection display device, and are not limited here.

[0056] The upper light shield is rectangular, and its shape should at least cover the viewing window 10 of the projection display device. When the light shield is closed, the upper light shield provides dustproof and impact-proof protection for the viewing window 10. An upwardly protruding operating part 21 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 22 and 24 are provided on the inner side of the upper light shield to limit the movement of the top light shield 2, thus protecting the viewing window 10 and preventing damage to it from the light shield.

[0057] The wing plate is disposed on the side of the upper light shield 2. 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 curved and protrudes to the bottom.

[0058] A second fixing post 27 is provided on the inner side of the top of the wing plate, and a chamfered boss is provided at the end of the second fixing post 27; a light shield pivot 25 is provided on the outer side of the top of the wing plate, and the second fixing post 27 and the light shield pivot 25 are respectively provided at the same position on the wing plate. A through hole is provided in the second fixing post 27 and the light shield pivot 25 for the screw 7 to pass through, so as to realize the rotatable connection between the top light shield 2 and the outer shell 1.

[0059] A guide post 26 is provided near the lower edge of the wing plate to connect the top light shield 2 and the innermost side light shield 35, and to limit the rotation of the top light shield 2 relative to the innermost side light shield 35.

[0060] like Figure 11 As shown, the side light shield 3 is approximately fan-shaped. The side light shield 3 is rotatably connected to the top of the side wall of the outer casing 1 near its center. The side light shield 3 includes an edge near the rear wall of the outer casing 1 (i.e., the edge away from the viewing window), an edge near the viewing window, and a lower edge. The length of the edge of the side light shield 3 near the viewing window is the same as the length of the edge near the rear wall of the outer casing. The lower edge of the side light shield 3 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 8 As shown, after the sunshade is fully opened, the top sunshade 2 opens to the maximum rotation angle relative to the viewing window, and multiple side sunshades 3 unfold between the wing plate and the outer shell 1. The wing plate and multiple side sunshades 3 together form the side sunshade part of the outer shell; the lower edge of the wing plate and the lower edge of multiple side sunshades 3 together form a smoothly transitioning arc-shaped edge protruding to the bottom.

[0061] The top of the side light shield 3 is provided with a pivot hole 33, and the side light shield 3 is provided with a guide post 32 and a guide groove 31 near the lower edge, which are used to realize the connection and positioning of adjacent side light shields 3, the connection and positioning of the side light shield 3 and the top light shield 2, and the connection and positioning of the side light shield 3 and the outer shell 1.

[0062] In this embodiment, such as Figure 8 As shown, multiple side light shields 3 are provided on each side wall of the outer casing 1, including: the innermost side light shield 35, the middle layer side light shields 36 and 37, and the outermost side light shield 38; wherein, the innermost side light shield 35, the middle layer side light shields 36 and 37, and the outermost side light shield 38 have similar shapes, and the size of each side light shield 3 can be the same or different. Accordingly, the maximum rotation angle of different side light shields can be the same or different.

[0063] like Figure 11As shown, each side light shield 3 has a guide groove 31 and a positioning hole 32 near its lower edge. The guide groove of the innermost side light shield 35 cooperates with the guide post 26 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 3 of adjacent layers cooperate with each other and can be connected and rotated relative to each other by a fastener 39 passing through the positioning hole 32 and the guide groove 31. The fastener 39 can slide within the guide groove 31, thus the fastener 39 also serves as a guide post.

[0064] In this embodiment, the wing of the top light-shielding plate 2 can rotate relative to the innermost side light-shielding plate 35. In other embodiments, the wing and the innermost side light-shielding plate 35 can be fixedly connected, and during the folding and unfolding of the light shield, only the multiple side light-shielding plates 3 change their unfolded and folded states, while the relative positions of the wing and the innermost side light-shielding plate 35 remain unchanged.

[0065] Similarly, in this embodiment, the outermost side light shield 38 is fixedly connected to the outer shell 1 by a third fixing post 14 disposed on the outer shell 1, and a fixing member 40 passing through the positioning hole 32 of the outermost side light shield 38 and the third fixing post 14. During the folding and unfolding of the light shield, there is no relative positional change between the outermost side light shield 38 and the outer shell 1; only other side light shields 3 are inserted between the outermost side light shield 38 and the outer shell 1. In other embodiments not shown, the outermost side light shield 38 can rotate relative to the outer shell through the structure of guide posts and guide grooves, which is not limited here.

[0066] The following is combined Figure 12 and Figure 13The connection between the top light-shielding plate 2, the multiple side light-shielding plates 3, and the outer casing 1 is described. A first fixing post 11 is provided on the top of the side wall of the outer casing 1. The end of the first fixing post 11 has a chamfered boss 15 and an internal thread, for example, by using a heat-pressed nut 9 inside the fixing hole of the first fixing post 11. A second fixing post 27 is provided on the inner side of the top of the wing plate. The end of the second fixing post 27 has a chamfered boss. A light-shielding hood pivot 25 is provided on the outer side of the top of the wing plate. The second fixing post 27 and the light-shielding hood pivot 25 are correspondingly arranged on both sides of the wing plate, and both the second fixing post 27 and the light-shielding hood pivot 25 have through holes penetrating the wing plate. A pivot hole 33 is provided on the top of the multiple side light-shielding plates 3. Compression springs 8 and pairs of friction plates 4 are fitted onto the second fixed post 27 and the first fixed post 11. The friction surfaces 41 of the two friction plates 4 are arranged opposite each other, and the compression spring 8 abuts against the wing plate and the friction plate 4. The center of the friction plate 4 is provided with a chamfered hole 42. One of the friction plates 4 has a chamfered hole 42 fitted onto the chamfered boss 15, and the other friction plate 4 has a chamfered hole fitted onto the chamfered boss of the second fixed post 27. Multiple side shielding plates 3 are fitted onto the outside of the sunshade rotating shaft 25 through the pivot hole 33. Screws 7 pass through the through holes in the center of the sunshade rotating shaft 25, the wing plate, and the second fixed post 27, and extend into the interior of the first fixed post 11, where they are screwed into the internal thread of the first fixed post 11 (i.e., the internal thread of the heat-pressed nut 9), thereby realizing the installation of multiple side sunshade plates 3 and the top mounting plate 2 on the top of the side wall of the outer casing 1. During the rotation of the sunshade, the two friction plates 4 rotate relative to each other to provide damping, thereby suspending the sunshade in any rotation position.

[0067] The opening and folding processes of the light shield are described in detail below. The opening and folding of the light shield are achieved by a first guide structure between the side light shields 3 of adjacent layers, a second guide structure between the side wall of the outer shell 1 and the side light shield (outermost side light shield 38) adjacent to the outer shell 1, and a third guide structure between the side light shield (innermost side light shield 35) adjacent to the wing plate and the wing plate.

[0068] The first guide structure limits the maximum rotation angle between two adjacent side light-shielding plates 3; the second guide structure limits the maximum rotation angle of the outermost side light-shielding plate 38 relative to the outer shell 1; and the third guide structure limits the maximum rotation angle of the wing plate relative to the innermost side light-shielding plate 35. The maximum rotation angle of the outermost side light-shielding plate 38 relative to the outer shell 1, the maximum rotation angle between two adjacent side light-shielding plates 3, and the maximum rotation angle of the top light-shielding plate 2 relative to the innermost side light-shielding plate 35 are all between 15 and 45 degrees. These three maximum rotation angles can be the same or different.

[0069] 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 38 relative to the outer shell 1, the maximum rotation angle between two adjacent side sunshades, and the maximum rotation angle of the top sunshade relative to the innermost side sunshade 35 the same.

[0070] The folded state of the sun hood is as follows Figure 7 As shown, at this time, the wing plate and multiple side light shields 3 overlap with the side wall of the outer shell 1, and the upper light shield covers the viewing window 10, which has a protective effect on the viewing window.

[0071] like Figure 8 As shown, during the opening of the light shield, the top light shield 2 and the multiple side light shields 3 rotate upwards respectively. The rotation of the top light shield 2 and the multiple side light shields 3 can be performed simultaneously or sequentially, without restriction.

[0072] As a typical embodiment, when the light shield is fully opened, the top light shield 2 can be rotated upward to a first position relative to the innermost side light shield 35. 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 38 can be rotated upward to a third position relative to the outer shell 1. These three positions all correspond to the guide post sliding to the upper end of the guide groove.

[0073] When the light shield is fully opened, the maximum angle between the upper light shield and the viewing window 10 is equal to the maximum rotation angle of the outermost side light shield 38 relative to the outer shell 1, the maximum rotation angle of the innermost side light shield 35 relative to the outermost side light shield 38 (equal to the sum of the maximum rotation angles between multiple adjacent side light shields), and the maximum rotation angle of the top light shield 2 relative to the innermost side light shield 35. Of these three rotation angles, except for the maximum rotation angle of the innermost side light shield 35 relative to the outermost side light shield 38 which is not zero, the other two angles can be zero depending on the installation method between the side light shield 3 and the outer shell and wing plates. The maximum angle between the upper light shield and the viewing window 10 is not less than 60 degrees and does not exceed 155 degrees.

[0074] Because of the use of multiple side light shields 3, the top light shield can be opened to a position parallel to the rear wall of the outer casing 1. At this position, the light shield does not block light from the viewing window 10. 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 light shield.

[0075] During the folding process (i.e., closing process) of the sunshade, the top sunshade 2 is pushed downwards. The rotation of the top sunshade 2 will cause multiple side sunshades 3 to rotate downwards relative to the outer shell 1 together, thus folding the sunshade.

[0076] The top light shield 2 can be rotated downward to the fourth position relative to the innermost side light shield 35. 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 38 can be rotated downward to the sixth position relative to the outer shell 1. These three positions correspond to the guide post sliding to the lower end of the guide groove.

[0077] The projection display device provided in this embodiment includes a top light shield and multiple side light shields. By using a first fixed post on the outer shell, a second fixed post on the light shield, and a rotating shaft, combined with friction plates, elastic elements, and fixing elements, the light shield can rotate relative to the outer shell and can be suspended at any position, making it highly practical.

[0078] In the second embodiment described above, the structure of the folding light shield is described as taking the example of setting multiple side light shields on one side wall of the outer shell 1. When only one side light shield is set on each side wall of the outer shell 1, the opening and folding of the light shield can also be realized. During the light shielding process, the top light shield rotates relative to the side light shield, and the side light shield rotates relative to the side wall of the outer shell 1. The guiding structure and connecting structure are similar to those in the second embodiment, and will not be described in detail here.

[0079] In addition, in foldable sunshades, besides using rigid sunshades as shown in the figure for shading, some of the sunshades can be replaced with flexible materials. For example, only the edges of the aforementioned side sunshades can be retained as frames, and flexible materials can be used to cover them to form a plate-like sunshade structure. During the folding process, only the folding of multiple frames needs to be designed. The flexible materials will overlap as the frames fold, which can also achieve the switching between folded and open states. This will not be described in detail here.

[0080] In summary, the projection display device with a light shield provided by this utility model includes a housing with a viewing window on the front; a light shield is provided on the outside of the housing, wherein the light shield is movably connected to the top of the side wall of the housing, and the position of the light shield relative to the housing can be adjusted, so that the light shielding state of the light shield is adjustable and suitable for use in different lighting environments.

[0081] The above provides a detailed description of the projection display device with a 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 light shield, comprising a housing, wherein a viewing window is provided on the front side of the housing, characterized in that: A light shield is provided on the outside of the casing; The light shield includes a top light shield; The top light-shielding plate includes an upper light-shielding plate and two wing plates fixedly connected to the upper light-shielding plate; The shape of the upper light-shielding plate at least covers the viewing window of the projection display device; The two wing plates are respectively movably connected to the top of the two side walls of the housing, so that the position of the top light shield relative to the housing can be changed, thereby changing the light shielding state of the light shield.

2. The projection display device as described in claim 1, characterized in that: The top of each wing plate is rotatably connected to the top of the side wall of the housing, so that the top light shield can rotate toward or away from the viewing window.

3. The projection display device as described in claim 1, characterized in that: The wing plate is provided with a sliding groove, and a sliding member is provided on the top of the side wall of the outer shell. The sliding member is confined within the sliding groove so that the wing plate can slide relative to the outer shell.

4. The projection display device as described in claim 1, 2, or 3, characterized in that: It also includes a fastener for fixing the wing plate to the outer shell. Loosening the fastener makes the position of the sunshade adjustable, while tightening the fastener fixes the position of the sunshade.

5. The projection display device as described in claim 1, characterized in that: The top of the outer shell is provided with a first fixing post, and the interior of the first fixing post is provided with a fixing hole; A second fixing post is provided on the inner side of the wing plate, and a through hole penetrating the wing plate is provided inside the second fixing post. The fastener passes through the second fastening post and then into the first fastening post.

6. The projection display device as described in claim 1, characterized in that: The light shield also includes multiple side light shields, which are rotatably connected to the top of the two side walls of the outer shell, respectively. When the light shield is opened, one or more of the side light shields unfold between the side wall of the housing and the wing plate; When the light shield is closed, the multiple side light shields and the wing plates overlap with the side walls of the outer shell.

7. The projection display device as described in claim 6, characterized in that: The top of the outer shell is provided with a first fixing post, and the inside of the first fixing post is provided with internal threads; A second fixing post is provided on the inner side of the wing plate, and a rotating shaft is provided on the outer side of the wing plate. The second fixing post and the rotating shaft are provided at corresponding positions on both sides of the wing plate, and a through hole is provided inside the wing plate. The fastener passes through the rotating shaft, the wing plate, and the second fixed post, and is then fixedly connected to the first fixed post. The side shading plate is provided with a pivot hole; the side shading plate is mounted on the pivot of the wing plate through the pivot hole.

8. The projection display device as described in claim 5 or 7, characterized in that: The first fixing post has a chamfered boss at its end, and the second fixing post has a chamfered boss at its end. Two friction plates are sleeved on the first fixed post and the second fixed post, the friction surfaces of the two friction plates are arranged opposite each other, and the chamfered holes of the two friction plates are correspondingly arranged on the chamfered bosses of the first fixed post and the second fixed post. An elastic element is provided between the wing plate and the friction plate.

9. The projection display device as described in claim 1, characterized in that: The width of the wing plate gradually increases from the top downwards.

10. The projection display device as described in claim 1, characterized in that: The light shield is made of a rigid material, or the light shield is made of a combination of rigid and flexible materials.

11. The projection display device as described in claim 1, characterized in that: The lower edge of the light shield is either an arc shape that protrudes to the bottom or a shape that is concave to the top.

12. The projection display device as described in claim 1, characterized in that: The light shield also includes a rear connecting plate, the three sides of which are connected to the upper light shield and the two wing plates, respectively.

Images