Opening and closing type rear projection box body

Abstract

The utility model discloses an opening and closing type rear projection box, which relates to the technical field of projection boxes, and comprises a front combination frame, a rear combination frame and a reflector assembly, the front combination frame is positioned on the front side of the rear combination frame, and the front side of the front combination frame is fixedly connected with a screen assembly through bolts. Light shading assemblies are arranged on the opposite sides of the front combination frame and the rear combination frame, and each light shading assembly comprises a light shading cover. According to the utility model, through the arrangement of the shading assembly, in the design of the open-close type box body, the mode of sealing the external light path of the projection system by the shading cover is adopted to protect the light path from being polluted by dust, so that compared with the existing box body, the box body has great technical advantages, and the maintenance period of the internal and external light paths of the box body is greatly prolonged; and even in the life cycle of the projection system, maintenance of an external light path can be avoided, the service life of optical devices such as a projector lens, a projection box reflector assembly and a screen assembly is greatly prolonged, and the service life of the whole projection display system is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a projection box technical field, concretely is a kind of open-close type back projection box. BACKGROUND

[0002] Large-screen projection spliced display wall is composed of N (row) ×M (column) independent display units, each unit is combined by projection box, projector, signal input / output interface of projector, screen assembly and mirror assembly etc. The original back projection box structure is composed of a frame of special design aluminum profile, and the six faces of the frame are provided with special design aluminum alloy sealing plates. With the improvement of the light source of the projector, the increase of the brightness of the projector, the increase of the resolution of the DMD chip, the back projection unit with large size, high brightness and high resolution emerges as the times require, so the size of the projection box is also large. The size of the general projection unit is now 70-80 inches. The large-size box will face a problem of packaging and transportation cost.

[0003] The original box is a box structure of aluminum profile frame plus metal sealing plate, but it is not a fully sealed structure. Although the frame and the sealing plate are embedded structures, there are still gaps. There are also gaps between the rear cover and the skeleton of the box, the screen assembly and the box. The entrance and exit of the connecting cable inside and outside the box are also not sealed. All these gaps will cause dust pollution to the projection outer light path (from the projector lens to the inside of the screen assembly). Especially for the reflective projection box, the projector lens is vertically upward, and the accumulated dust is faster. Therefore, the old box structure is affected by environmental dust, which causes the screen display of the entire projection unit to attenuate quickly. The maintenance cycle of the entire projection wall system is short, and the workload is large. The projector lens, the reflector (the reflective film is plated on the front side of the glass. If the reflective film is plated on the inside of the glass, it will cause secondary reflection and ghosting in the image) and the Fresnel lens are all very precise optical devices, which are not suitable for frequent cleaning. In addition, the surface of the sealing plate of the original box is treated by spraying plastic, but this surface treatment cannot achieve full diffuse reflection. The inner surface of the sealing plate of the box will produce a certain reflection effect, and there will be a small amount of multiple reflection stray light in the box, which will affect the picture quality. Therefore, an open-close type back projection box is needed to solve the existing problems. SUMMARY

[0004] The utility model aims at providing an open-close type back projection box. The utility model aims at making up for the shortcomings of the prior art and providing an open-close type back projection box. The outer light path of projection is fully sealed by a light shield, which is easy to install and relatively low in price.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The utility model discloses a kind of open-close type back projection box, including front combination frame, rear combination frame and mirror subassembly, the front combination frame is located at the front side of rear combination frame, the front side of the front combination frame is fixedly connected with screen subassembly by bolt, the opposite side of the front combination frame and rear combination frame is provided with light shielding subassembly, the light shielding subassembly includes light shield, oblique upper side of the light shield is equipped with installation port, the mirror subassembly includes mounting plate, the edge of the installation port is fixedly connected with the edge of mounting plate by velcro, the opposite side of the front combination frame and rear combination frame is provided with a group of connecting rod subassembly, and light shielding subassembly is located at the opposite side of connecting rod subassembly.

[0007] The utility model further is provided, screen subassembly includes screen frame, the front side opening of the light shield is fixedly connected with the rear side of screen frame by adhesive tape.

[0008] The utility model further is provided, the bottom of the light shield is structured with lens barrel, the shape of the lens barrel is from upper square transition to circle and the end of lens barrel has telescopic elasticity, and the bottom of lens barrel is sleeved on the neck outside of projector lens.

[0009] The utility model further is provided, rear combination frame includes middle crossbeam and middle vertical beam, the inner side of rear combination frame is fixedly connected with a group of symmetrical middle vertical beam, and middle crossbeam is fixedly connected on the opposite side of middle vertical beam, the upper portion of middle crossbeam and the opposite side of middle vertical beam are fixedly connected with rear upper baffle, middle crossbeam (201) is provided with rear mirror support for mirror angle adjustment.

[0010] The utility model further is provided, connecting rod subassembly includes long connecting rod, short connecting rod and connecting rod joint, long connecting rod is set in pairs, and long connecting rod is set as X, the both ends of long connecting rod are fixedly connected with connecting rod joint, the top of long connecting rod is provided with short connecting rod, and the connecting rod joint at the top of long connecting rod is rotatably connected with one end of short connecting rod by pin.

[0011] The utility model further is provided, the side of front combination frame is fixedly connected with connecting rod support one, and the end of short connecting rod away from connecting rod joint is movably connected with the inner side of connecting rod support one by bolt, the side of front combination frame is fixedly connected with connecting rod support two, and connecting rod support two is located at the bottom end of connecting rod support one, and the bottom end of another long connecting rod is movably connected to the inner side of connecting rod support two by threaded pin.

[0012] The utility model is further configured as follows: the rear assembly frame includes a connecting beam, and the end of the other short connecting rod away from the connecting rod joint is movably connected to the connecting beam through a bolt pin, the sides of the rear assembly frame are fixedly connected to the connecting rod bracket three, and the bottom end of the long connecting rod is movably connected to the inner side of the connecting rod bracket three through a bolt pin.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model has a great technical advantage over existing boxes in that the light shielding component is provided, and the light shield used in the design of the retractable box seals the external light path of the projection system, which protects the light path from dust contamination. The maintenance cycle of the internal and external light paths of the box is greatly extended, and even the maintenance of the external light path can be eliminated during the life cycle of the projection system, which greatly extends the service life of optical components such as the projector lens, the projection box reflector assembly and the screen assembly, thereby improving the service life of the entire projection display system.

[0015] 2. The utility model provides a connecting rod assembly, so that the retractable box has two states: open and folded. The box is in the open state during operation and in the folded and stacked state during packaging and transportation. This structure effectively solves the packaging and transportation costs of large-sized boxes, and is especially beneficial for projects requiring long-distance transportation and overseas orders. The working time from the opening to the folded and stacked state is very short, only a dozen minutes under normal circumstances, and it is extremely easy to operate. Generally, skilled workers can operate it by referring to the installation instructions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the combination frame of the utility model;

[0020] Figure 4 This is a schematic diagram of the components on opposite sides of the combination frame of the present invention;

[0021] Figure 5 For this utility model Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0022] Figure: 1, front combination frame; 2, rear combination frame; 201, middle cross beam; 202, middle vertical beam; 203, connecting beam; 3, mirror assembly; 301, mounting plate; 4, screen assembly; 401, screen frame; 5, light shield assembly; 501, light shield cover; 502, mounting port; 503, lens sleeve; 6, connecting rod assembly; 601, long connecting rod; 602, short connecting rod; 603, connecting rod joint; 7, rear upper sealing plate; 8, connecting rod support one; 9, connecting rod support two; 10, connecting rod support three. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] As shown in the drawings, Figures 1-5 The utility model provides a technical scheme: a open and close type back projection box, including front combination frame 1, rear combination frame 2 and mirror assembly 3, the middle installation of rear combination frame 2 has rear cover plate, the installation and debugging of projector are convenient, the rear right of rear combination frame 2 is equipped with a groove type sealing plate, the function is the input, output box of installing projector signal and various cable fixed installation passageway, the left of rear combination frame 2 is equipped with inner and outer two layers of sealing plate, and the space formed by sealing plate is used as the heat dissipation passageway of each projection unit, and the front side of front combination frame 1 is fixedly connected with screen assembly 4 through bolt on the front side, and the opposite side of front combination frame 1 and rear combination frame 2 is provided with light shield assembly 5, light shield assembly 5 includes light shield cover 501, and the oblique upper side of light shield cover 501 is equipped with mounting port 502, and mirror assembly 3 includes mounting plate 301, and mirror assembly 3 is installed at 45 °, and it is high in front and low in back, and the edge of mounting port 502 is fixedly connected with the edge of mounting plate 301 through nylon snap fastener, and the opposite side of front combination frame 1 and rear combination frame 2 is provided with a group of connecting rod assembly 6, and light shield assembly 5 is located at the opposite side of connecting rod assembly 6, and the outer light path of screen assembly 4 from mirror, again from mirror to projector (the projector is not drawn in back projection box) lens constitutes the outer light path of back projection box, and the light shield cover 501 made of black flame-retardant cloth fully closes this outer light path.

[0025] As shown in the drawings, Figure 1 , Figure 2 and Figure 4 As shown in the drawings, screen assembly 4 includes screen frame 401, and the front side opening of light shield cover 501 is fixedly connected with the inner side of screen frame 401 through adhesive tape, or the front opening of light shield cover 501 is embedded in the groove of screen frame 401 with O-shaped sealing rubber strip.

[0026] As shown in Figure 1 , Figure 2 and Figure 4 , the bottom of the light shield 501 is configured with a lens sleeve 503, the shape of the lens sleeve 503 is from the upper square to the circular, the end of the lens sleeve 503 has the elastic expansion, and the bottom of the lens sleeve 503 is sleeved outside the neck of the projector lens, the rear combination frame 2 includes a middle horizontal beam 201 and a middle vertical beam 202, the inner side of the rear combination frame 2 is fixedly connected with a group of symmetrical middle vertical beams 202, and the middle horizontal beam 201 is fixedly connected to the opposite sides of the middle vertical beams 202, the upper part of the middle horizontal beam 201 and the opposite sides of the middle vertical beams 202 are fixedly connected with a rear upper sealing plate 7, the middle horizontal beam 201 is provided with a rear mirror bracket for adjusting the angle of the mirror, the lens sleeve 503 is a telescopic structure, which is sleeved into the neck of the projector lens to form a seal, ensuring the full sealing and dark environment from the projector lens to the inner side of the screen assembly 4, basically avoiding the pollution of the environmental dust to the outer light path of the inner side of the projector lens, the mirror and the screen assembly 4, and due to the light shield 501, the full sealing of the outer projection light path and the full diffuse reflection surface of the inner surface of the light shield 501 greatly reduce the influence of the stray light of multiple reflections on the picture quality, and due to the full sealing of the outer light path, the dark environment of the outer light path is better, and the contrast of the screen display picture is improved.

[0027] As shown in Figure 1 , Figure 2 and Figure 5 , the connecting rod assembly 6 includes a long connecting rod 601, a short connecting rod 602 and a connecting rod joint 603, the long connecting rods 601 are arranged in pairs and in X shape, the two ends of the long connecting rod 601 are fixedly connected with the connecting rod joints 603, and the top ends of the long connecting rods 601 are provided with the short connecting rods 602. The connecting rod joint 603 at the top end of the long connecting rod 601 is rotatably connected with one end of the short connecting rod 602 through a pin. The side edges of the front combination frame 1 are fixedly connected with a connecting rod bracket one 8. One end of the short connecting rod 602 away from the connecting rod joint 603 is movably connected with the inner side of the connecting rod bracket one 8 through a bolt. The side edges of the front combination frame 1 are fixedly connected with a connecting rod bracket two 9, and the connecting rod bracket two 9 is located at the bottom end of the connecting rod bracket one 8. The bottom end of the other long connecting rod 601 is movably connected to the inner side of the connecting rod bracket two 9 through a threaded pin. The rear combination frame 2 includes a connecting beam 203. One end of the other short connecting rod 602 away from the connecting rod joint 603 is movably connected with the connecting beam 203 through a bolt pin. The side edges of the rear combination frame 2 are fixedly connected with a connecting rod bracket three 10. The bottom end of the long connecting rod 601 is movably connected with the inner side of the connecting rod bracket three 10 through a bolt pin.

[0028] The process of changing the open state of the box into the closed state of the package: the upper part of the light shield 501 is separated from the mirror, the fixed screw of the frame screen is loosened, the screen assembly 4 is removed (the screen assembly 4 is attached to the light shield 501), the rear fixed screw of the mirror assembly 3 is loosened, the mirror assembly 3 is rotated to the vertical state, the mirror assembly 3 is removed, the locking screw on the left and right side connecting rods of the box is loosened, the horizontal rod of the aluminum profile on the lower inside of the front combined frame 1 is removed, the front combined frame 1 and the rear combined frame 2 are folded through the left and right connecting rods, the minimum size of the folded box can be 190mm, and then the box is packaged and transported. When arriving at the installation site, the box is assembled according to the reverse process described above to form a complete working state box. After the entire splicing wall system is spliced, in order to ensure the appearance of the entire splicing wall, the sealing plates are installed on the left and right sides of the box outside the splicing wall and on the top of the box, so that the entire splicing wall body has a great improvement in internal function and can still maintain the integrity and consistency of the appearance of the wall body.

[0029] Working principle: The open-close box includes a front combined frame 1 and a rear combined frame 2, the front and rear frames are staggered in the height direction, some fixed supports are installed on the front and rear frames, the rear supports are provided with cover plates, sealing plates and heat dissipation air pipes, etc., and the opening and closing are realized through the connecting rod assembly 6. When the box is opened to the installation working state, the locking screw at the connecting place of the connecting rod is locked, the horizontal rod of the aluminum profile on the lower inside of the front combined frame 1 is installed, the mirror assembly 3 and the screen assembly 4 are installed, so that a complete back projection box is formed. In the lower part of the rear combined frame 2, the six-axis adjustment table part is installed, and the projector is installed on the six-axis adjustment table. The input and output interface box of the projector is installed in the fixed port of the rear right of the rear combined frame 2 provided with a groove type sealing plate, the functional panel of the interface box faces outward, the connection line from the interface box to the projector is connected, the light shield 501 attached to the screen is sleeved on the neck part of the mirror assembly 3 and the lens of the projector, so that a complete projection unit is formed. The characteristics of the projection unit are that the outer light path (lens to screen) of the projection unit is sealed by the light shield 501, the part of the projector body below the neck part of the lens is outside the light shield 501, the interface box of the projector, the six-axis adjustment table and many connection cables are also outside the light shield 501, but all of them are in the projection box. In this way, the space of the box is divided into two parts by the light shield 501, only the outer light path part from the lens neck to the mirror and then to the inside of the screen is in the light shield 501, and other parts are outside the light shield 501, which ensures the sealing and cleanliness of the outer light path, and the radiant heat and leakage of stray light of the projector light source are also excluded outside the light shield 501. In this way, the clean environment of the light path in the light shield 501 and the interference of other useless light are ensured, and the heat dissipation of the entire box is also beneficial. The dust cloth light shield 501 is flame-retardant, and the safety of the projection unit will not be affected.

[0030] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The preferred embodiments of the utility model disclosed above are only used for helping to explain the utility model. The preferred embodiments do not describe all the details exhaustively, and also do not limit the utility model to only the specific implementation manners described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited only by the claims and the entire scope and equivalents thereof.

Claims

1. A retractable rear projection box, comprising a front assembly frame (1), a rear assembly frame (2) and a reflector assembly (3), characterized in that: The front assembly frame (1) is located at the front side of the rear assembly frame (2); the front side of the front assembly frame (1) is fixedly connected to a screen assembly (4) by bolts; a shading assembly (5) is provided on opposite sides of the front assembly frame (1) and the rear assembly frame (2); the shading assembly (5) includes a shading cover (501); a mounting opening (502) is provided obliquely above the shading cover (501); the reflector assembly (3) includes a mounting plate (301); the edge of the mounting opening (502) is fixedly connected to the edge of the mounting plate (301) by Velcro; a group of connecting rod assemblies (6) are provided on opposite sides of the front assembly frame (1) and the rear assembly frame (2), and the shading assembly (5) is located on opposite sides of the connecting rod assembly (6).

2. The retractable rear projection box according to claim 1, characterized in that: The screen assembly (4) comprises a screen frame (401), and the front opening of the light shield (501) is fixedly connected to the inner side of the screen frame (401) via adhesive tape.

3. The retractable rear projection box according to claim 2, characterized in that: The bottom of the light shield (501) is structured with a lens sleeve (503), the shape of the lens sleeve (503) transitions from a square shape at the top to a circle, the end of the lens sleeve (503) has elasticity, and the bottom of the lens sleeve (503) is sleeved on the outside of the neck of the projector lens.

4. The retractable rear projection box according to claim 3, characterized in that: The rear assembly frame (2) comprises a middle cross beam (201) and a middle vertical beam (202); a group of symmetrical middle vertical beams (202) are fixedly connected to the inner side of the rear assembly frame (2); the middle cross beams (201) are fixedly connected to opposite sides of the middle vertical beams (202); a rear upper sealing plate (7) is fixedly connected to the upper part of the middle cross beam (201) and the opposite side of the middle vertical beam (202); a rear reflector bracket is provided on the middle cross beam (201) for adjusting the reflector angle.

5. The retractable rear projection box according to claim 4, characterized in that: The connecting rod assembly (6) comprises a long connecting rod (601), a short connecting rod (602) and a connecting rod joint (603); the long connecting rods (601) are arranged in pairs and are arranged in an X shape; both ends of the long connecting rod (601) are fixedly connected to the connecting rod joint (603); the top end of the long connecting rod (601) is provided with a short connecting rod (602); the connecting rod joint (603) located at the top end of the long connecting rod (601) is rotatably connected to one end of the short connecting rod (602) through a pin.

6. The retractable rear projection box according to claim 5, characterized in that: The sides of the front assembly frame (1) are fixedly connected to a connecting rod bracket (8), one end of the short connecting rod (602) away from the connecting rod joint (603) is movably connected to the inner side of the connecting rod bracket (8) through a bolt, and the sides of the front assembly frame (1) are fixedly connected to a connecting rod bracket (9), and the connecting rod bracket (9) is located at the bottom end of the connecting rod bracket (8), and the bottom end of the other long connecting rod (601) is movably connected to the inner side of the connecting rod bracket (9) through a threaded pin.

7. The retractable rear projection box according to claim 6, characterized in that: The rear assembly frame (2) includes a connecting beam (203), one end of the other short connecting rod (602) away from the connecting rod joint (603) is movably connected to the connecting beam (203) through a bolt pin, the side edges of the rear assembly frame (2) are fixedly connected to the connecting rod bracket three (10), and the bottom end of the long connecting rod (601) is movably connected to the inner side of the connecting rod bracket three (10) through a bolt pin.

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