Artwork protection box

Abstract

The invention discloses an artwork protection box. The artwork protection box comprises a first shell assembly, a connecting structure and a second shell assembly, the first shell assembly comprises a first shell and a bottom plate, the bottom plate is fixedly connected to the inner side of the first shell, and a first air inlet is formed in the first shell; the second shell assembly comprises a second shell, a pressing plate, a pneumatic telescopic structure, an air pipe and a reversing valve, the second shell is detachably connected with the first shell in a sealed mode through a connecting structure, a closed first cavity is formed between the first shell and the second shell, the pressing plate is installed on the inner side of the second shell through the pneumatic telescopic structure, and the pressing plate is parallel and opposite to the bottom plate; the second shell is provided with an extraction opening, the extraction opening is connected with the pneumatic telescopic structure through an air pipe, the air pipe is provided with a second air inlet communicated with the first cavity, and the reversing valve is arranged on the air pipe; according to the artwork protection box, painting and calligraphy are protected in a tiled mode, the painting and calligraphy are prevented from being deformed and damaged, and meanwhile the painting and calligraphy are in a sealed low-humidity environment and prevented from being affected with damp.

Description

TECHNICAL FIELD

[0001] The present application relates to the art protection device technical field, especially to an art protection box. BACKGROUND

[0002] Art galleries, museums and other often need to tour the collection of art, the need to transport the art, such as calligraphy and painting, to other places. In the transport of art into the protection box, to prevent damage to the art.

[0003] The existing protection box, such as the patent shown in the application number CN202122000168.0, includes a box body and an air bag arranged in the box body. This protection box is only suitable for calligraphy and painting with a picture frame. When in use, the calligraphy and painting with a picture frame are placed in the box body, and the air bag is inflated to wrap the picture frame and prevent the picture frame from shaking in the box body. This protection box is not suitable for protecting calligraphy and painting without a picture frame, because calligraphy and painting are made of paper or oilcloth, which are relatively fragile materials. The calligraphy and painting may be damaged or the paint on the surface of the calligraphy and painting may fall off when the air bag is inflated.

[0004] For example, the patent shown in the application number CN201610027894.2 is a protection box for calligraphy and painting art. Although this protection box is used for transporting calligraphy and painting without a picture frame, the calligraphy and painting art needs to be rolled up when in use. During the rolling process, the paint on the surface of the calligraphy and painting art may fall off and damage the calligraphy and painting art. SUMMARY

[0005] The present application is to solve the above-mentioned defects of the existing art protection box, and proposes an art protection box. The calligraphy and painting are protected by being laid flat to prevent deformation and damage. At the same time, the calligraphy and painting are in a sealed low-humidity environment to prevent them from being damp.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: An art protection box comprises a first shell assembly, a connecting structure and a second shell assembly. The first shell assembly comprises a first shell and a bottom plate. The bottom plate is fixedly connected to the inner side of the first shell. The first shell is provided with a first air inlet. The second shell assembly comprises a second shell, a pressing plate, a pneumatic telescopic structure, an air pipe and a reversing valve. The second shell is sealingly and detachably connected to the first shell through the connecting structure. A closed first chamber is formed between the first shell and the second shell. The pressing plate is installed on the inner side of the second shell through the pneumatic telescopic structure. The pressing plate is parallel to the bottom plate. The second shell is provided with an air outlet. The air outlet is connected to the pneumatic telescopic structure through the air pipe. The air pipe is provided with a second air inlet which is communicated with the first chamber. The reversing valve is arranged on the air pipe. The protection box has an installation state and a protection state, in the installation state, the pressing plate and the bottom plate are loosened from the artwork, the reversing valve guides the air suction port and the pneumatic telescopic structure, air is sucked through the air suction port, the pneumatic telescopic structure is elongated, the pressing plate and the bottom plate clamp the artwork, the reversing valve guides the air suction port and the second air inlet, and the protection box is switched to the protection state.

[0007] Through the above setting, first, the painting and calligraphy without a frame can be protected flatly, preventing deformation of the painting and calligraphy during transportation and reducing damage to the painting and calligraphy; second, air is sucked through the air suction port, the pressing plate automatically fixes the painting and calligraphy, the operation is convenient, after the reversing valve switches the air path, the air in the first chamber is sucked out, so that the painting and calligraphy are in a sealed low-humidity environment, preventing the painting and calligraphy from being damp; third, the first chamber is in a negative pressure environment, the first shell and the second shell are more tightly connected, and the protection box is more difficult to be opened.

[0008] Further, the pneumatic telescopic structure includes a cylinder, a piston, and a spring rod, the piston is slidingly connected in the cylinder, one end of the spring rod is fixedly connected with the piston, the other end is fixedly connected with the pressing plate, one end of the cylinder away from the pressing plate is fixedly connected with the inner side of the second shell, the other end of the cylinder is a necked portion slidingly connected with the spring rod and forms a sealed second chamber between the piston, the air pipe is connected with the second chamber.

[0009] Through the above setting, after the air in the pneumatic telescopic structure is extracted, the pneumatic telescopic structure is elongated, which can drive the pressing plate to move towards the bottom plate.

[0010] Further, the reversing valve includes a sliding tube and a first spring, the sliding tube is slidingly connected in the air pipe, one side of the sliding tube is provided with a third air inlet, the other side of the sliding tube is provided with a lever, the air pipe is provided with a long hole, the lever penetrates through the long hole, the end of the lever extends to the outside of the air pipe, and the first spring is installed in the air pipe and connected with the sliding tube; the reversing valve further includes a trigger elastic piece fixedly connected to one end of the spring rod close to the piston; in the installation state, the end of the trigger elastic piece is arranged on the side of the sliding tube away from the pressing plate and presses the inner wall of the cylinder, and the third air inlet is arranged on the side of the second air inlet close to the cylinder and is staggered with the second air inlet; in the protection state, the trigger elastic piece is embedded in the air pipe and blocks the air pipe, the trigger elastic piece pushes the sliding tube, the first spring is compressed, and the third air inlet is communicated with the second air inlet.

[0011] Through the above setting, first, the piston is moved to the position, the reversing valve automatically switches the air path; second, the trigger elastic piece is embedded in the air pipe, while switching the air path, it plays the role of a pin lock, locking the piston in the cylinder, preventing the pressing plate from loosening the painting and calligraphy.

[0012] Further, the trigger elastic piece includes a first sleeve, a second spring, and a plug, one end of the first sleeve is fixedly connected to the spring rod, the plug is slidingly connected in the first sleeve, the second spring is arranged in the first sleeve and connected with the plug, and the second spring applies a pushing force to the plug.

[0013] Further, the pneumatic telescopic structure further comprises a positioning column fixedly connected to the inner side of the cylinder body near the one end of the pressing plate, and when the protection box is in the protection state, the side of the first sleeve near the pressing plate abuts against the positioning column.

[0014] Through the above arrangement, the piston and the trigger elastic member are more easily moved into position so that the trigger elastic member is aligned with the air pipe, and the blocking block can be smoothly embedded in the air pipe. In addition, it also prevents the piston from moving too far and prevents the pressing plate from pressing the painting too hard and damaging the painting.

[0015] Further, the pneumatic telescopic structure further comprises a reset spring installed in the cylinder body and connected to the side of the piston away from the pressing plate, for applying a pulling force to the piston.

[0016] Through the above arrangement, the pneumatic telescopic structure is conveniently reset.

[0017] Further, the spring rod comprises a third spring, a push rod and a second sleeve, one end of the second sleeve is fixedly connected to the piston, the other end of the second sleeve extends towards the pressing plate and penetrates the end of the cylinder body, one end of the push rod is slidably connected in the second sleeve, the other end of the push rod is fixedly connected to the pressing plate, and the third spring is arranged in the second sleeve and connected to the end of the push rod away from the pressing plate.

[0018] Further, the pressing plate is rectangular, and four pneumatic telescopic structures are arranged at the four corners of the pressing plate, the air pipe comprises a collecting section, a transition section and four branch sections, one end of the collecting pipe is connected to the air outlet, the other end of the collecting pipe is connected to the middle of the transition section, both ends of the collecting pipe are connected to two branch sections respectively, the four branch sections correspond to the four pneumatic telescopic structures one by one, and the end of each branch section is provided with the second air inlet and the reversing valve and connected to the corresponding pneumatic telescopic structure.

[0019] Through the above arrangement, the pressing force of the pressing plate on the painting is more uniform, and the painting is uniformly stressed everywhere to avoid local damage to the painting.

[0020] Further, the protection box further comprises an air pressure gauge for detecting the air pressure in the first chamber, and the air pressure gauge is arranged outside the first shell or the second shell.

[0021] Through the above arrangement, the air pressure in the first chamber can be conveniently reduced to a preset value. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The figure is a schematic view of the protection box of the embodiment.

[0023] Figure 2 The figure is a front view of the protection box of the embodiment.

[0024] Figure 3 The figure is a schematic view of the first shell assembly of the embodiment.

[0025] Figure 4 Schematic view of a second housing assembly according to an embodiment.

[0026] Figure 5 Internal view of a protective case according to an embodiment.

[0027] Figure 6 Sectional view of a protective case according to an embodiment.

[0028] Figure 7 Enlarged view of A in Figure 6

[0029] Figure 8 Schematic view of a pressing plate after contacting with sulfuric acid paper according to an embodiment.

[0030] Figure 9 Partial schematic view of a protective case in a protection state according to an embodiment. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be further described in detail below with reference to the embodiments and in conjunction with the drawings.

[0032] As shown in Figures 1 to 9 , a protective case for artworks comprises a first housing assembly, a connecting structure 2 and a second housing assembly; the first housing assembly comprises a first housing 3 and a bottom plate 4, the bottom plate 4 is fixedly connected to the inner side of the first housing 3, and the first housing 3 is provided with a first air inlet 5; the second housing assembly comprises a second housing 6, a pressing plate 7, a pneumatic telescopic structure 8, an air pipe 9 and a reversing valve 10, the second housing 6 is sealingly and detachably connected to the first housing 3 through the connecting structure 2, a first chamber is formed between the first housing 3 and the second housing 6, the pressing plate 7 is installed on the inner side of the second housing 6 through the pneumatic telescopic structure 8, the pressing plate 7 is parallel to the bottom plate 4, the second housing 6 is provided with an air outlet 11, the air outlet 11 is connected to the pneumatic telescopic structure 8 through the air pipe 9, the air pipe 9 is provided with a second air inlet 13 which is in communication with the first chamber, and the reversing valve 10 is arranged on the air pipe 9; the protective case has an installation state and a protection state; in the installation state, the pressing plate 7 and the bottom plate 4 release the artworks, the reversing valve 10 connects the air outlet 11 and the pneumatic telescopic structure 8, air is drawn through the air outlet 11, the pneumatic telescopic structure 8 is elongated, the pressing plate 7 and the bottom plate 4 clamp the artworks, the reversing valve 10 connects the air outlet 11 and the second air inlet 13, and the protective case is switched to the protection state.

[0033] ​Through the above setting, first, the flat protection of calligraphy and painting without frame can prevent deformation of calligraphy and painting during transportation and reduce damage to calligraphy and painting; second, through the air extraction port 11, the pressing plate 7 automatically fixes the calligraphy and painting, which is convenient to operate. After the reversing valve 10 switches the air path, the air in the first chamber is extracted, so that the calligraphy and painting are in a sealed low-humidity environment to prevent calligraphy and painting from being damp; third, the first chamber is in a negative pressure environment, and the first shell 3 and the second shell 6 are more closely connected, so that the protection box is more difficult to be opened.

[0034] The protection box of the present application is used for transporting calligraphy and painting, especially suitable for transporting calligraphy and painting without frame; the protection box of the present application is basically a cuboid structure, which is convenient to put into rectangular calligraphy and painting; the material of the first shell 3 and the second shell 6 can be carbon fiber or aluminum alloy, etc. with good strength and stability, or a transparent material with high strength can be used to facilitate the observation of the internal calligraphy and painting; when in use, the first shell assembly is placed horizontally on the ground, the bottom plate 4 is horizontal, the bottom plate 4 is rectangular and has an area larger than the calligraphy and painting to cover the entire lower side of the calligraphy and painting. After laying a piece of sulfuric acid paper 91 on the upper side of the bottom plate 4, the calligraphy and painting to be transported is laid flat on the sulfuric acid paper to protect the lower side of the calligraphy and painting 92, and another piece of sulfuric acid paper 91 is laid on the upper side of the calligraphy and painting to protect the upper side of the calligraphy and painting. Then, the second shell assembly is placed on the upper side of the first shell assembly, and the connecting structure 2 locks the second shell 6 on the first shell 3. To increase the air tightness between the first shell 3 and the second shell 6, a rubber ring can be provided between the first shell 3 and the second shell 6. The connecting structure 2 can be connected by a buckle such as a snap cup, which will not be described again. At this time, the pressing plate 7 is arranged on the upper side of the calligraphy and painting, and the shape of the pressing plate 7 is consistent with the shape of the bottom plate 4 and is symmetrically arranged on the upper side of the bottom plate 4. At this time, the protection box is in the installed state, the pressing plate 7 has not pressed the calligraphy and painting, and the pneumatic telescopic structure 8 is in the contracted state and has a short length. Under the action of the reversing valve 10, the air extraction port 11 is connected with the pneumatic telescopic structure 8 through the air pipe 9. The air extraction port 11 is arranged as a one-way valve structure, which can only exhaust air but cannot intake air. After the air extraction port 11 is connected with the air extractor, the air extractor extracts the air in the pneumatic telescopic structure 8 through the air extraction port 11 and the air pipe 9. As shown in Figure 8 , the pneumatic telescopic structure 8 is elongated to drive the pressing plate 7 to move downward and fix the calligraphy and painting. The downward pressure of the pressing plate 7 of the present application is greater than 10 Newton and less than 20 Newton. In order to fix the calligraphy and painting, the pressure should not be too large to prevent the calligraphy and painting from being damaged. As shown in Figure 9As shown, the reversing valve 10 switches the air path, the protection box switches to the protection state, the reversing valve 10 connects the suction port 11 and the second air inlet 13, the air pipe 9 is disconnected with the pneumatic telescopic structure 8, the air extractor continues to extract air, the air in the first chamber leaves through the second air inlet 13, the air pipe 9 and the suction port 11, the air pressure in the first chamber decreases, the first shell 3 and the second shell 6 are tightly adsorbed together, the moisture in the first chamber is extracted, the humidity in the first chamber is reduced, the painting is in a low-humidity environment, and the painting is prevented from being damp, and thus the protection box is installed, and the air extractor can be disconnected with the suction port 11; after the protection box reaches the other place, the first air inlet 5 is opened, the external air enters the protection box, the air pressure in the first chamber rises, the operation connecting structure 2 is operated, the second shell assembly is taken off from the first shell assembly, the protection box is opened, and the painting is taken out.

[0035] The protection box of the present application can also transport paintings with picture frames. Referring to the above steps, due to the protection of the picture frame, the picture frame can be directly placed on the bottom plate 4 without placing the sulfuric acid paper. In order to prevent the picture frame from sliding between the bottom plate 4 and the pressing plate 7, the surfaces of the bottom plate 4 and the pressing plate 7 can be frosted to improve the friction.

[0036] As an implementation manner, the pneumatic telescopic structure 8 includes a cylinder body 81, a piston 82 and a spring rod 83. The piston 82 is slidingly connected in the cylinder body 81. One end of the spring rod 83 is fixedly connected with the piston 82, and the other end is fixedly connected with the pressing plate 7. The end of the cylinder body 81 away from the pressing plate 7 is fixedly connected with the inner side of the second shell 6. The other end of the cylinder body 81 is slidingly connected with the spring rod 83 and forms a sealed second chamber between the piston 82. The air pipe 9 is connected with the second chamber.

[0037] Through the above setting, after the air in the pneumatic telescopic structure 8 is extracted, the pneumatic telescopic structure 8 is elongated, and the pressing plate 7 can be driven to move towards the bottom plate 4.

[0038] The cylinder body 81 of the present application is vertically fixedly connected with the inner side of the second shell 6. The cross section of the cylinder body 81 is square. The piston 82 is adapted to the cylinder body 81, and the piston 82 can only move axially in the cylinder body 81 and cannot rotate by itself. The spring rod 83 is an elastic rod which can axially stretch and contract, and is coaxially arranged with the cylinder body 81. The inner side of the cylinder body 81 is wrapped with the spring rod 83. A sealing oil or a rubber ring can be arranged in the inner side of the cylinder body 81 to improve the air tightness between the cylinder body 81 and the spring rod 83. When the air pipe 9 transports the air in the second chamber to the outside, the air pressure in the second chamber decreases, the piston 82 moves along the cylinder body 81 towards the painting, the piston 82 drives the spring rod 83 and the pressing plate 7 to move towards the painting, and the pressing plate 7 contacts the sulfuric acid paper on the upper side of the painting. Figure 8As shown, the air in the second chamber continues to move outward through the air pipe 9, the piston 82 continues to move along the cylinder 81, the spring rod 83 shrinks and deforms, and the pressure plate 7 increases the pressure on the painting to the preset pressure. After that, the reversing valve 10 switches the air path, and the air path is switched as shown in FIG. 6. Figure 9 As shown, the piston 82 stops moving, and the air extractor starts to extract the gas in the first chamber through the air extraction port 11.

[0039] As an implementation manner, the reversing valve 10 includes a sliding pipe 101 and a first spring 102. The sliding pipe 101 is slidingly connected in the air pipe 9. The sliding pipe 101 is provided with a third air inlet 103 on one side thereof. The sliding pipe 101 is provided with a lever 104 on the other side thereof. The air pipe 9 is provided with a long hole 12. The lever 104 penetrates through the long hole 12. The lever 104 extends to the outside of the air pipe 9 at the end portion thereof. The first spring 102 is installed in the air pipe 9 and connected with the sliding pipe 101. The reversing valve 10 further includes a trigger elastic member 105 fixedly connected to the spring rod 83 at the side surface close to the one end of the piston 82. In the installation state, the end portion of the trigger elastic member 105 is arranged at the side of the sliding pipe 101 away from the pressure plate 7 and presses the inner wall of the cylinder 81. The third air inlet 103 is arranged at the side of the second air inlet 13 close to the cylinder 81 and staggered with the second air inlet 13. In the protection state, the trigger elastic member 105 is embedded in the air pipe 9 and blocks the air pipe 9. The trigger elastic member 105 pushes the sliding pipe 101. The first spring 102 is compressed. The third air inlet 103 is in communication with the second air inlet 13.

[0040] Through the above arrangement, first, after the piston 82 is moved to the position, the reversing valve 10 automatically switches the air path. Second, the trigger elastic member 105 is embedded in the air pipe 9. When the air path is switched, the trigger elastic member 105 plays the role of a pin lock and locks the piston 82 in the cylinder 81 to prevent the pressure plate 7 from loosening the painting.

[0041] The material of the air pipe 9 is pure copper. The end portion of the air pipe 9 is connected to the side surface of the cylinder 81 close to the bottom plate 4 in the radial direction. Figure 7As shown, the outer wall of the sliding tube 101 is attached to the inner wall of the air pipe 9 to ensure good air tightness; when the protection box of the application is in the installed state, one end of the sliding tube 101 is flush with the inner wall of the cylinder body 81, the lever 104 is at one end of the long hole 12 close to the cylinder body 81, the outer diameter of the lever 104 is equal to the width of the long hole 12, so that the sliding tube 101 can only move axially in the air pipe 9 and cannot rotate, the third air inlet 103 is staggered with the second air inlet 13, so that the air pipe 9 is disconnected with the first chamber, at this time, the second chamber is communicated with the air outlet 11 through the sliding tube 101, the air pipe 9 and the air outlet 11; as the air extractor extracts air, the gas pressure in the second chamber decreases, the piston 82 drives the spring rod 83 and the pressing plate 7 to move towards the bottom plate 4, the trigger elastic member 105 is an axially compressed elastic member, the outer end of the trigger elastic member 105 abuts against the inner wall of the cylinder body 81 and moves towards the bottom plate 4 synchronously with the piston 82, after the pressing plate 7 contacts the upper sulfuric acid paper, at this time, the trigger elastic member 105 is still located on the side of the sliding tube 101 away from the bottom plate 4, as shown in the figure, Figure 8 At this time, the spring force of the spring rod 83 is basically zero, as the air extractor continues to extract air, the gas pressure in the second chamber continues to decrease, the piston 82 and the trigger elastic member 105 continue to move towards the bottom plate 4, when the trigger elastic member 105 moves to the sliding tube 101, the trigger elastic member 105 rebounds, the end portion is embedded in the air pipe 9, blocks the end of the air pipe 9 and drives the sliding tube 101 to move, the sliding tube 101 moves along the air pipe 9, the second air inlet 13 coincides with the third air inlet 103, so that the first chamber is communicated with the air pipe 9 through the second air inlet 13 and the third air inlet 103, one end of the first spring 102 is fixedly connected with the end of the sliding tube 101 away from the trigger elastic member 105, the other end of the first spring 102 is fixedly connected in the air pipe 9, after the sliding tube 101 is driven by the trigger elastic member 105, the first spring 102 is compressed, as shown in the figure, Figure 9 If the air tightness of the first chamber and the second chamber is damaged and the gas pressure rises after the protection box of the application is transported, the trigger elastic member 105 can also play the role of a locking pin to prevent the spring rod 83 from rebounding and releasing the picture, so as to ensure that the picture is always in a flat state during transportation. The lever 104 of the application facilitates the reset of the pneumatic telescopic structure 8 for next time transportation, specifically, the sliding tube 101 is manually pushed towards the cylinder body 81 through the lever 104, the end portion of the trigger elastic member 105 is pushed out of the air pipe 9 by the sliding tube 101, so that the piston 82 can return to the initial position along the cylinder body 81.

[0042] As an implementation manner, the trigger elastic member 105 comprises a first sleeve 1051, a second spring 1052 and a plug 1053, one end of the first sleeve 1051 is fixedly connected to the spring rod 83, the plug 1053 is slidably connected in the first sleeve 1051, the second spring 1052 is arranged in the first sleeve 1051 and connected with the plug 1053 to apply a pushing force to the plug 1053.

[0043] The first sleeve 1051 of the present application is vertically fixedly connected to the side of the far end of the spring rod 83 from the bottom plate 4, when the protection box is in the installation state, the second spring 1052 is in the compressed state, the blocking block 1053 is pressed on the inner wall of the cylinder body 81, the blocking block 1053 is made of metal material, the sliding resistance between the blocking block 1053 and the inner wall of the cylinder body 81 is small, as shown in Figure 8 When the piston 82 and the trigger elastic element 105 move towards the bottom plate 4, the blocking block 1053 slides along the inner wall of the cylinder body 81 and approaches the sliding pipe 101, after the pressing plate 7 presses the painting tightly, the blocking block 1053 just moves to the sliding pipe 101, the second spring 1052 rebounds to push the blocking block 1053 to embed into the air pipe 9, the blocking block 1053 blocks the air pipe 9 at the same time, and the sliding pipe 101 is driven to move, so that the second air inlet 13 coincides with the third air inlet 103, as shown in Figure 9 At this time, part of the blocking block 1053 is embedded in the air pipe 9, and part of the blocking block 1053 is located in the first sleeve 1051, the blocking block 1053 plays the role of a bolt to prevent the piston 82 from moving up and down; manually pushing the sliding pipe 101 to move towards the cylinder body 81 through the push rod 104 can push the blocking block 1053 out of the air pipe 9, which is convenient for the piston 82 to reset.

[0044] As an implementation manner, the pneumatic telescopic structure 8 further comprises a positioning column 85, the positioning column 85 is fixedly connected to the inner side of the end of the cylinder body 81 close to the pressing plate 7, when the protection box is in the protection state, the side of the first sleeve 1051 close to the pressing plate 7 abuts against the positioning column 85.

[0045] Through the above setting, the piston 82 and the trigger elastic element 105 are more easily moved to the position, so that the trigger elastic element 105 is aligned with the air pipe 9, and the blocking block 1053 can be smoothly embedded in the air pipe 9, in addition, it also prevents the piston 82 from moving too much, and prevents the pressing plate 7 from pressing the painting too hard to damage the painting.

[0046] When the air extractor extracts air from the protection box in the installation state, the piston 82 and the trigger elastic element 105 move towards the bottom plate 4, the first sleeve 1051 of the trigger elastic element 105 approaches the positioning column 85, when the first sleeve 1051 abuts against the positioning column 85, the first sleeve 1051 and the piston 82 cannot further advance, at this time, the pressing plate 7 has moderate pressure on the painting, and it is not necessary to continue to increase the pressure, and the blocking block 1053 is just aligned with the air pipe 9, and the second spring 1052 pushes the blocking block 1053 into the air pipe 9.

[0047] As an implementation manner, the pneumatic telescopic structure 8 further comprises a reset spring 84, the reset spring 84 is installed in the cylinder body 81 and connected to the side of the piston 82 away from the pressing plate 7, for applying a pulling force to the piston 82.

[0048] Through the above setting, it is convenient for the pneumatic telescopic structure 8 to reset.

[0049] The protection box of the present application is in the installed state, as shown in Figure 7 The reset spring 84 is in the free state, and the elastic force is basically zero. When the protection box is in the protection state, the reset spring 84 is stretched, and the reset spring 84 is small in rigidity and small in elastic force when stretched, and is only used for resetting the piston 82. After the sliding pipe 101 is pushed by the manual through the push rod 104 to push the block 1053 out of the air pipe 9, the reset spring 84 rebounds, and the piston 82 resets.

[0050] As an implementation manner, the spring rod 83 includes a third spring 831, a push rod 832, and a second sleeve 833. One end of the second sleeve 833 is fixedly connected with the piston 82, the other end of the second sleeve 833 extends to the pressing plate 7 and penetrates the end of the cylinder body 81, one end of the push rod 832 is slidably connected in the second sleeve 833, the other end of the push rod 832 is fixedly connected with the pressing plate 7, and the third spring 831 is arranged in the second sleeve 833 and connected with the end of the push rod 832 away from the pressing plate 7.

[0051] The first sleeve 1051 of the trigger elastic member 105 of the present application is fixedly connected with the side surface of the end of the second sleeve 833 away from the pressing plate 7 in a vertical manner, the second sleeve 833 is basically in a cylindrical shape, and the end of the cylinder body 81 close to the pressing plate 7 is inwardly tapered and sealingly slidably connected with the outer surface of the second sleeve 833. Figure 7 When the protection box of the present application is in the installed state, as shown in When the protection box of the present application is in the installed state, as shown in

[0052] As an implementation manner, the pressing plate 7 is in a rectangular shape, and the pneumatic telescopic structure 8 is provided with four, which are respectively arranged on the four corners of the pressing plate 7. The air pipe 9 includes a collecting section 91, a transition section 92, and four branch sections 93. One end of the air pipe 9 is connected with the air outlet 11, and the other end of the air pipe 9 is connected to the middle of the transition section 92. The two ends of the air pipe 9 are respectively connected with two branch sections 93. The four branch sections 93 correspond to the four pneumatic telescopic structures 8 one by one. The end of the branch section 93 is provided with the second air inlet 13 and the reversing valve 10 and is connected with the corresponding pneumatic telescopic structure 8.

[0053] Through the above arrangement, the pressure of the pressing plate 7 on the painting is more uniform, and the painting is uniformly stressed everywhere, so as to avoid that the painting is damaged due to local pressure.

[0054] When the protection box in the installation state is being pumped, the air in the pneumatic telescopic structure 8 is pumped out through the branch section 93, the transition section 92 and the collection section 91; the sliding tube of the reversing valve is slidingly connected in the branch section 93, when the protection box in the protection state is being pumped, the block of the trigger elastic member 105 is embedded in the branch section 93, the third air inlet 103 of the sliding tube coincides with the second air inlet 13 on the branch section 93, and the air in the first chamber is pumped out through the second air inlet, the third air inlet, the branch section 93, the transition section 92 and the collection section 91.

[0055] As an implementation manner, the protection box further comprises an air pressure gauge 15 for detecting the air pressure in the first chamber, and the air pressure gauge 15 is arranged outside the first shell 3 or the second shell 6.

[0056] Through the above arrangement, the air pressure in the first chamber can be conveniently reduced to a preset value.

[0057] The air in the first chamber is pumped out by the air pump of the present application, the air pressure in the first chamber can be measured in real time by the air pressure gauge 15, and the air pressure in the first chamber can be conveniently reduced to a preset value.

[0058] It should be understood that, for those skilled in the art, improvements or changes can be made according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the present application.

Claims

1. An art piece protection case, characterized by, The utility model relates to a kind of protective box for art, including: First shell assembly, the first shell assembly includes first shell and bottom plate, the bottom plate is fixedly connected in first shell inside, first air inlet is provided on the first shell; Connecting structure and second shell assembly, the second shell assembly includes second shell, pressing plate, pneumatic telescopic structure, air pipe and reversing valve, the second shell is sealed detachably connected with first shell by connecting structure, the first shell and the second shell form the first chamber between it, the pressing plate is installed in second shell inside by pneumatic telescopic structure, the pressing plate and bottom plate are parallel to each other, suction port is provided on the second shell, the suction port is connected with pneumatic telescopic structure by air pipe, the second air inlet that is communicated with first chamber is provided on the air pipe, the reversing valve is arranged on air pipe; The protective box has installation state and protection state, when installation state, the pressing plate and bottom plate loosen art, the reversing valve is communicated with pneumatic telescopic structure by suction port, suction by suction port, pneumatic telescopic structure lengthens, the pressing plate and bottom plate clamp art, the reversing valve is communicated with second air inlet by suction port, the protective box switches to protection state.

2. An art piece protection case as claimed in claim 1, wherein, The pneumatic telescopic structure includes cylinder, piston, spring rod, the piston is slidably connected in cylinder, one end of the spring rod is fixedly connected with the piston, the other end is fixedly connected with the pressing plate, one end of the cylinder, away from the pressing plate, is fixedly connected with the inside of the second shell, the other end of the cylinder is necked and is slidably connected with the spring rod, and forms the second chamber between the piston, the air pipe is connected with the second chamber.

3. An art protection case according to claim 2, wherein, The reversing valve includes sliding tube and first spring, the sliding tube is slidably connected in the air pipe, one side of the sliding tube is provided with third air inlet, the other side of the sliding tube is provided with lever, the air pipe is provided with long hole, the lever penetrates the long hole, the lever end extends to the outside of the air pipe, the first spring is installed in the air pipe and is connected with the sliding tube;The reversing valve further includes trigger elastic member fixedly connected on the side of the spring rod close to the piston;When installation state, the end of the trigger elastic member is arranged on the side of the sliding tube, away from the pressing plate, and extrudes the inner wall of the cylinder, the third air inlet is arranged on the side of the second air inlet close to the cylinder, and is staggered with the second air inlet;When protection state, the trigger elastic member is embedded in the air pipe and blocks the air pipe, the trigger elastic member pushes the sliding tube, the first spring is compressed, and the third air inlet is communicated with the second air inlet.

4. An art piece protection case as claimed in claim 3, wherein, The trigger elastic member includes first sleeve, second spring and plug, one end of the first sleeve is fixedly connected on the spring rod, the plug is slidably connected in the first sleeve, the second spring is arranged in the first sleeve and is connected with the plug, and exerts thrust on the plug.

5. An art piece protection case as claimed in claim 4, wherein, The pneumatic telescopic structure further includes positioning column, the positioning column is fixedly connected on the inside of the one end of the cylinder close to the pressing plate, when the protective box is in protection state, the side of the first sleeve close to the pressing plate is abutted with the positioning column.

6. The art protection box of claim 3, wherein, The pneumatic telescopic structure further includes reset spring, the reset spring is installed in the cylinder, and is connected with the side of the piston, away from the pressing plate, for exerting pulling force on the piston.

7. The art protection box of claim 3, wherein, The spring rod comprises a third spring, a push rod and a second sleeve, one end of the second sleeve is fixedly connected with the piston, the other end of the second sleeve extends to the pressing plate and penetrates through the end of the cylinder body, one end of the push rod is slidably connected in the second sleeve, the other end of the push rod is fixedly connected with the pressing plate, the third spring is arranged in the second sleeve and connected with the end of the push rod away from the pressing plate.

8. The art protection box of claim 3, wherein, The pressing plate is rectangular, the four pneumatic telescopic structures are arranged on the four corners of the pressing plate respectively, the air pipe comprises a collecting section, a transition section and four branch sections, one end of the collecting section is connected with the air outlet, the other end of the collecting section is connected to the middle of the transition section, the two ends of the collecting section are connected with two branch sections respectively, the four branch sections correspond to the four pneumatic telescopic structures respectively, the end of each branch section is provided with the second air inlet and the reversing valve and connected with the corresponding pneumatic telescopic structure.

9. The art protection box of claim 1, wherein, The protection box further comprises a gas pressure gauge for detecting the gas pressure in the first chamber, and the gas pressure gauge is arranged outside the first housing or the second housing.

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