Heat insulation door body structure

Abstract

The utility model relates to the field of 3D printer equipment, and provides a heat insulation door body structure which is suitable for sealing an observation window in a 3D printer shell and comprises a door frame body suitable for being hinged to the 3D printer shell; the first cover plate is installed on the door frame body, and the second cover plate is clamped to the door frame body and located on one side of the first cover plate; the first cover plate and the second cover plate are arranged in a spaced mode, and a heat insulation cavity is formed between the first cover plate and the second cover plate. At least one part of the first cover plate and at least one part of the second cover plate are transparent. The second cover plate is clamped on the door frame body instead of being fixed through a screw or a screw, so that the adaptability of the second cover plate to thermal expansion and cold contraction is improved, and the risk of cracking of the second cover plate is greatly reduced.

Description

Technical Field

[0001] This application relates to the field of 3D printer equipment, and particularly to a heat-insulating door body structure. Background Art

[0002] Currently, in industrial-grade FDM 3D printers, maintaining a high-temperature environment in the printer chamber is an important performance requirement. When the printing size is large or specific materials are used, problems such as warping or printing failure may occur due to uneven chamber temperature. This requires designers to not only consider the thermal stability of the material but also consider the heat insulation and heat dissipation design of the entire printer chamber structure to ensure the stable operation of the equipment and the quality of the workpiece in a high-temperature environment.

[0003] The design of the door body structure of the printer chamber needs to consider factors such as sealing, heat insulation, and transparency. The selection of the structural material and the installation and fixing method need to consider the influence of factors such as high-temperature environment and thermal expansion and contraction. Considering the transparency factor is because the operator needs to observe the printing situation inside the chamber from time to time. Currently, the door body structure is generally a double-layer heat-insulating structure, with an air chamber for heat insulation between the outer cover plate and the inner cover plate. The inner cover plate is fixed to the door frame by screws or bolts, which causes the inner cover plate to be prone to cracking due to the effect of thermal expansion and contraction when the environmental temperature changes.

[0004] Therefore, there is an urgent need in the market for a door body structure that can reduce the risk of cracking of the inner cover plate. Summary of the Utility Model

[0005] To solve the above problems, this application provides a heat-insulating door body structure with a clever design and a simple structure. By clamping the second cover plate on the door frame body instead of fixing it with screws or bolts, the adaptability of the second cover plate to the effect of thermal expansion and contraction is improved, and the risk of cracking of the second cover plate is greatly reduced. The technical solution adopted in this application is as follows:

[0006] A heat-insulating door body structure suitable for covering the observation window on the outer shell of a 3D printer, comprising:

[0007] A door frame body, which is adapted to be hinged to the outer shell of the 3D printer; a first cover plate and a second cover plate, the first cover plate is installed on the door frame body, and the second cover plate is clamped to the door frame body and is located on one side of the first cover plate; the first cover plate and the second cover plate are arranged at intervals, and an insulating chamber is provided between the first cover plate and the second cover plate; at least a part of the first cover plate and the second cover plate is transparent.

[0008] By clamping the second cover plate to the door frame body, rather than setting perforations on the second cover plate and then fixing the second cover plate using screws or bolts as in the prior art, this avoids the situation where the second cover plate first cracks at the perforations due to the thermal expansion and contraction of the material, improves the adaptability of the second cover plate to thermal expansion and contraction, and greatly reduces the risk of cracking of the second cover plate.

[0009] In some embodiments, the door frame body includes an outer flanging, a middle frame, and an inner flanging that are sequentially connected. The middle frame is annularly closed. The outer flanging and the inner flanging are spaced apart in the thickness direction of the heat-insulating door body structure. The edge of the first cover plate is adhesively bonded to the outer flanging, and the second cover plate is pressed against the inner flanging by a pressing piece, and the pressing piece is installed on the inner flanging; the first cover plate, the outer flanging, the middle frame, the inner flanging, and the second cover plate enclose to form the heat-insulating chamber.

[0010] In some embodiments, the inner peripheral edge of the inner flanging sinks towards the direction close to the first cover plate to form a concave portion; the second cover plate is pressed against the concave portion by the pressing piece, and the pressing piece is installed on the concave portion.

[0011] By providing the concave portion, the second cover plate is installed in the concave portion. When the heat-insulating door body structure is installed on the 3D printer housing and in the closed state, there is a sealing strip between the second cover plate and the edge of the observation window, and the sealing strip is in a squeezed and deformed state. And the part of the inner flanging that does not sink towards the direction close to the first cover plate (defined as the flat portion) abuts against the edge of the observation window, which will prevent the sealing strip from being further squeezed. That is to say, by providing the concave portion and the flat portion and installing the second cover plate in the concave portion, this will limit the amount of squeezing and deformation of the sealing strip provided between the second cover plate and the edge of the observation window, so that the sealing strip can exert a good sealing effect.

[0012] In some embodiments, a notch is provided at the edge of the second cover plate, and the notch is used to make way for the connection between the pressing piece and the concave portion, and the pressing piece presses on the edge of the notch of the second cover plate.

[0013] By providing the notch, the second cover plate can cover the entire concave portion as much as possible. That is to say, the overlapping width between the second cover plate and the concave portion can be made as wide as possible, which can ensure the sealing performance between the second cover plate and the concave portion after the second cover plate is pressed against the concave portion.

[0014] In some embodiments, a concave platform is provided at the edge of the second cover plate, the notch is provided in the concave platform, and the pressing piece presses on the bottom surface of the concave platform and the pressing piece does not protrude from the concave platform.

[0015] By setting a concave platform and arranging a notch within the concave platform, it can be ensured that after the pressing piece is pressed against the concave platform, the pressing piece does not protrude from the concave platform. In this way, after the sealing strip is pressed against the edge of the second cover plate and covers the pressing piece, the sealing strip and the second cover plate can be well adhered and cover the concave platform, ensuring the sealing performance between the second cover plate and the sealing strip at and near the concave platform.

[0016] In some embodiments, it further includes a sealing strip, which is arranged at the edge of the second cover plate and covers the concave platform, and the sealing strip protrudes from the lower concave part when not being extruded.

[0017] In some embodiments, the edge of the first cover plate is adhesively bonded to the side of the outer flanging away from the second cover plate.

[0018] By adhesively bonding the first cover plate to the side of the outer flanging away from the second cover plate, that is, adhesively bonding the first cover plate to the outside of the outer flanging. Compared with arranging the first cover plate inside the outer flanging, since there is sufficient installation operation space outside the outer flanging, the installation difficulty of the first cover plate can be reduced. In addition, adhesively bonding the first cover plate to the outside of the outer flanging can make the outside of the heat-insulating door body structure flat and improve the aesthetics of the heat-insulating door body structure.

[0019] In some embodiments, a magnetic attraction member is arranged on the side of the inner flanging away from the outer flanging.

[0020] By arranging the magnetic attraction member, when it is necessary to close the heat-insulating door body structure, the heat-insulating door body structure can be automatically magnetically attracted to the edge of the observation window, making the door closing operation labor-saving and time-saving, and also ensuring the closing strength of the heat-insulating door body structure to prevent the heat-insulating door body structure from being accidentally opened.

[0021] In some embodiments, the door frame body includes an outer flanging and a middle frame, the middle frame is annularly closed, the edge of the first cover plate is adhesively bonded to the inside of the outer flanging, a sealing gasket is arranged on the side of the first cover plate away from the outer flanging, the second cover plate presses and covers the sealing gasket through a pressing piece, and the pressing piece is installed on the outer flanging; the first cover plate, the sealing gasket and the second cover plate enclose to form the heat-insulating chamber.

[0022] In some embodiments, the door frame body further includes an inner flanging.

[0023] By arranging the inner flanging, the structural stability and strength of the door frame body can be improved, and the risk of deformation of the heat-insulating door body structure can be reduced.

[0024] A heat-insulating door body structure provided by the present application has at least one of the following beneficial effects:

[0025] 1. The heat-insulating door body structure provided by the present application has the second cover plate snap-connected to the door frame body, rather than the prior art where perforations are provided on the second cover plate and then the second cover plate is fixed using screws or bolts. This avoids the situation where the second cover plate first cracks at the perforations due to the thermal expansion and contraction of the material, improves the adaptability of the second cover plate to thermal expansion and contraction, and greatly reduces the risk of cracking of the second cover plate.

[0026] 2. The heat-insulating door body structure provided by the present application has a concave portion provided. The second cover plate is installed in the concave portion. When the heat-insulating door body structure is installed on the 3D printer housing and in the closed state, a sealing strip is provided between the second cover plate and the edge of the observation window, and the sealing strip is in a state of extrusion deformation. And the part of the inner flanging that does not sink towards the direction close to the first cover plate (defined as the flat portion) abuts against the edge of the observation window, which will prevent the sealing strip from being further extruded. That is to say, by providing the concave portion and the flat portion and installing the second cover plate in the concave portion, the amount of extrusion deformation of the sealing strip provided between the second cover plate and the edge of the observation window can be limited, so that the sealing strip can exert a good sealing effect.

[0027] 3. The heat-insulating door body structure provided by the present application has a notch provided, so that the second cover plate covers the entire concave portion as much as possible. That is to say, the overlapping width between the second cover plate and the concave portion can be made as wide as possible, which can ensure the sealing performance between the second cover plate and the concave portion after the second cover plate is pressed against the concave portion.

[0028] 4. The heat-insulating door body structure provided by the present application has a concave platform provided, and the notch is provided in the concave platform, so that after the pressing piece is pressed on the concave platform, it can be ensured that the pressing piece does not protrude from the concave platform. In this way, after the sealing strip is pressed on the edge of the second cover plate and covers the pressing piece, the sealing strip and the second cover plate can be well attached and cover the concave platform, ensuring the sealing performance of the second cover plate and the sealing strip at and near the concave platform.

[0029] 5. The heat-insulating door body structure provided by the present application has the first cover plate adhesively bonded to the side of the outer flanging away from the second cover plate. That is to say, the first cover plate is adhesively bonded to the outside of the outer flanging. Compared with setting the first cover plate on the inside of the outer flanging, because there is enough installation operation space on the outside of the outer flanging, the installation difficulty of the first cover plate can be reduced. In addition, the first cover plate is adhesively bonded to the outside of the outer flanging, which can make the outside of the heat-insulating door body structure flat and improve the aesthetics of the heat-insulating door body structure.

[0030] 6. The heat-insulating door body structure provided by the present application has a magnetic attraction member provided. When the heat-insulating door body structure needs to be closed, the heat-insulating door body structure can be automatically magnetically attracted to the edge of the observation window, making the door closing action labor-saving and time-saving, and can also ensure the closing strength of the heat-insulating door body structure and prevent the heat-insulating door body structure from being accidentally opened.

[0031] 7. The heat-insulating door body structure provided by this application can improve the structural stability and strength of the door frame body and reduce the risk of deformation of the heat-insulating door body structure by setting an inner flanging. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of a heat-insulating door body structure in a clear and understandable manner in combination with the drawings of the preferred embodiments:

[0033] Figure 1 is an exploded view of an embodiment of this application;

[0034] Figure 2 is Figure 1 the assembled state of the embodiment;

[0035] Figure 3 is Figure 2 a schematic diagram of the embodiment after hiding the sealing strip;

[0036] Figure 4 is Figure 3 an enlarged view of part A in [the relevant figure];

[0037] Figure 5 is a schematic diagram of an embodiment of the second cover plate in this application;

[0038] Figure 6 is Figure 5 an enlarged view of part B in [the relevant figure];

[0039] Figure 7 is Figure 2 a schematic diagram of the embodiment after hiding the first cover plate, the second cover plate and the sealing strip;

[0040] Figure 8 is Figure 2 a sectional view of the embodiment;

[0041] Figure 9 is Figure 8 an enlarged view of part C in [the relevant figure];

[0042] Figure 10 is Figure 2 a partial enlarged view after sectioning the embodiment;

[0043] Figure 11 is a schematic diagram of an embodiment of the pressing piece in this application;

[0044] Figure 12 is an exploded view of another embodiment of this application;

[0045] Figure 13 is Figure 12 the assembled state of the embodiment;

[0046] Figure 14 is Figure 13 an enlarged view of part D in

[0047] Figure 15 is Figure 12 a partially enlarged view after sectioning of the embodiment.

[0048] Explanation of the reference numerals in the drawings:

[0049] door frame body 1, first cover plate 2, second cover plate 3, outer flanging 4, middle frame 5, inner flanging 6, pressing piece 7, lower concave part 8, notch 9, concave platform 10, sealing strip 11, magnetic attraction member 12, sealing gasket 13. Detailed implementation manners

[0050] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will describe the specific implementation manners of the present application with reference to the accompanying drawings. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, and other implementation manners can be obtained.

[0051] To make the drawings concise, only the parts related to the present application are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, for components with the same structure or function, only one of them is schematically shown, or only one of them is labeled. In this document, "one" not only means "only this one", but also means "more than one" situation.

[0052] It should also be further understood that the term "and / or" used in the description of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0053] In this document, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0054] In addition, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0055] Refer to Figures 1 - 3 、 Figure 8 、 Figure 10, Figure 12 , Figure 13 , Figure 15 , this application provides a heat-insulating door body structure, which is used to be hinged on the shell of a 3D printer. By opening and closing the heat-insulating door body structure, the opening or closing of the observation window on the shell of the 3D printer can be realized. The heat-insulating door body structure includes: a door frame body 1, a first cover plate 2 and a second cover plate 3. The door frame body 1 is suitable for being hinged to the shell of the 3D printer; the first cover plate 2 is installed on the door frame body 1, and the second cover plate 3 is clamped to the door frame body 1 and is located on one side of the first cover plate 2; the first cover plate 2 and the second cover plate 3 are arranged at intervals, and a heat-insulating chamber is formed between the first cover plate 2 and the second cover plate 3; at least a part of both the first cover plate 2 and the second cover plate 3 is transparent.

[0056] Specifically, the door frame body 1 can be rotatably connected to the edge of the observation window of the 3D printer shell through a rotating component such as a hinge or a rotating shaft. At least a part of both the first cover plate 2 and the second cover plate 3 is transparent, which is convenient for the operator to observe the printing situation in the printer chamber from time to time. The first cover plate 2 and the second cover plate 3 can be transparent plates that can adapt to the temperature of the printer chamber, such as plastic plates or tempered glass. The plastic plate can be a polyimide plate, a polyether ketone plate, a fluoropolymer plate, a silane polymer plate, an olefin-based polymer plate, a phenyl polymer plate, etc.

[0057] It can be understood that in this embodiment, by clamping the second cover plate 3 on the door frame body 1 instead of setting perforations on the second cover plate 3 and then fixing the second cover plate 3 with screws or bolts in the prior art, the situation that the second cover plate 3 first cracks at the perforations due to the thermal expansion and contraction of the material is avoided, the adaptability of the second cover plate 3 to the thermal expansion and contraction effect is improved, and the risk of the second cover plate 3 cracking is greatly reduced.

[0058] Reference Figures 1 - 3 , Figures 7 - 10 , in one embodiment, the door frame body 1 includes an outer flanging 4, a middle frame 5 and an inner flanging 6 connected in sequence. The middle frame 5 is annularly closed. The outer flanging 4 and the inner flanging 6 are arranged at intervals along the thickness direction of the heat-insulating door body structure. The edge of the first cover plate 2 is adhesively bonded to the outer flanging 4, and the second cover plate 3 is pressed against the inner flanging 6 through a pressing piece 7. The pressing piece 7 is installed on the inner flanging 6; the first cover plate 2, the outer flanging 4, the middle frame 5, the inner flanging 6 and the second cover plate 3 enclose to form a heat-insulating chamber.

[0059] Specifically, the edge of the first cover plate 2 is adhesively bonded to the side of the outer flange 4 away from the second cover plate 3. It can be understood that the adhesive material used to bond the first cover plate 2 can withstand the temperature of the environment where the adhesive material is located. In other embodiments, the edge of the first cover plate 2 can also be adhesively bonded to the side of the outer flange 4 close to the second cover plate 3. It is easy to understand that by adhesively bonding the first cover plate 2 to the side of the outer flange 4 away from the second cover plate 3, that is, the first cover plate 2 is adhesively bonded to the outside of the outer flange 4. Compared with setting the first cover plate 2 inside the outer flange 4, since there is sufficient installation and operation space outside the outer flange 4, the installation difficulty of the first cover plate 2 can be reduced. In addition, when the first cover plate 2 is adhesively bonded to the outside of the outer flange 4, the outside of the heat-insulating door body structure can be made flat, improving the aesthetics of the heat-insulating door body structure.

[0060] Reference Figures 7 - 10 , in one embodiment, the inner peripheral edge of the inner flange 6 sinks towards the direction close to the first cover plate 2 to form a concave portion 8; the second cover plate 3 is pressed against the concave portion 8 through a pressing piece 7, and the pressing piece 7 is installed in the concave portion 8.

[0061] It can be understood that when the heat-insulating door body structure is in the closed state, a sealing strip 11 is provided between the second cover plate 3 and the edge of the observation window. The sealing strip 11 is clamped between the second cover plate 3 and the edge of the observation window. The specific installation position of the sealing strip 11 can be installed at the edge part of the observation window. In this case, there is no need to install the sealing strip 11 on the second cover plate 3 anymore, or the sealing strip 11 is installed at the edge position of the second cover plate 3, and there is no need to install the sealing strip 11 on the edge of the observation window anymore.

[0062] Whether the sealing strip 11 is installed on the second cover plate 3 or at the edge part of the observation window, in the above-mentioned embodiment, by providing the concave portion 8 and installing the second cover plate 3 in the concave portion 8, when the heat-insulating door body structure is installed on the 3D printer housing and in the closed state, the sealing strip 11 is in a state of being extruded and deformed, and the part of the inner flange 6 that does not sink towards the direction close to the first cover plate 2 (defined as the flat portion) abuts against the edge of the observation window, which will prevent the sealing strip 11 from being further extruded. That is to say, by providing the concave portion 8 and the flat portion and installing the second cover plate 3 in the concave portion 8, the amount of extrusion and deformation of the sealing strip 11 provided between the second cover plate 3 and the edge of the observation window can be limited, so that the sealing strip 11 can exert a good sealing effect.

[0063] Reference Figure 1 、 Figures 3 - 6 、 Figure 11, in one embodiment, a notch 9 is provided at the edge of the second cover plate 3. The notch 9 is used to make way for the connection between the pressing piece 7 and the concave portion 8, and the pressing piece 7 presses on the edge of the notch 9 of the second cover plate 3. By providing the notch 9, the second cover plate 3 can cover the entire concave portion 8 as much as possible, that is to say, the overlapping width between the second cover plate 3 and the concave portion 8 can be made as wide as possible, which can ensure the sealing performance between the second cover plate 3 and the concave portion 8 after the second cover plate 3 is pressed against the concave portion 8.

[0064] Reference Figures 3 - 6 , Figure 11 , in one embodiment, a concave platform 10 is provided at the edge of the second cover plate 3. The notch 9 is provided in the concave platform 10, and the pressing piece 7 presses on the bottom surface of the concave platform 10 and the pressing piece 7 does not protrude from the concave platform 10.

[0065] It should be noted that by providing the concave platform 10 and arranging the notch 9 in the concave platform 10, it can be ensured that the pressing piece 7 does not protrude from the concave platform 10 after the pressing piece 7 presses on the concave platform 10. In this way, after the sealing strip 11 presses on the edge of the second cover plate 3 and covers the pressing piece 7, the sealing strip 11 and the second cover plate 3 can be well attached and cover the concave platform 10, ensuring the sealing performance of the second cover plate 3 and the sealing strip 11 at and near the concave platform 10.

[0066] Reference Figure 1 , Figure 2 , Figures 8 - 10 , in one embodiment, the heat-insulating door body structure further includes a sealing strip 11. The sealing strip 11 is installed at the edge of the second cover plate 3 and covers the concave platform 10. When the sealing strip 11 is not squeezed, it protrudes from the concave portion 8.

[0067] Reference Figures 1 - 3 , Figure 7 , in one embodiment, a magnetic attraction member 12 is provided on the side of the inner flanging 6 away from the outer flanging 4. By providing the magnetic attraction member 12, when the heat-insulating door body structure needs to be closed, the heat-insulating door body structure can be automatically magnetically attracted to the edge of the observation window, making the door closing operation labor-saving and time-saving, and can also ensure the closing strength of the heat-insulating door body structure, preventing the heat-insulating door body structure from being accidentally opened. The magnetic attraction member 12 can be a material with stable magnetism, or a material whose magnetism is controlled by whether it is electrified or not.

[0068] Reference Figures 12 - 15 The embodiment shown in Figures 1 - 3 is different from the embodiment shown in

[0069] Reference Figures 12 - 15 , in one embodiment, the door frame body 1 further includes an inner flange 6. By providing the inner flange 6, the structural stability and strength of the door frame body 1 can be improved, and the risk of structural deformation of the heat-insulating door body can be reduced.

[0070] It should be noted that the above embodiments can be freely combined as needed. The above are only the preferred embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A heat-insulating door body structure is applicable to covering an observation window on the shell of a 3D printer, and is characterized in that, Comprising: A doorframe body, which is adapted to be hinged to the housing of a 3D printer; A first cover plate and a second cover plate, the first cover plate is installed on the doorframe body, and the second cover plate is snap-connected to the doorframe body and is located on one side of the first cover plate; the first cover plate and the second cover plate are spaced apart, and an insulation chamber is formed between the first cover plate and the second cover plate; at least a part of both the first cover plate and the second cover plate is transparent.

2. The heat-insulating door body structure according to claim 1, characterized in that, The doorframe body includes an outer flanging, a middle frame, and an inner flanging that are connected in sequence. The middle frame is annularly closed. The outer flanging and the inner flanging are spaced apart in the thickness direction of the heat-insulating door body structure. The edge of the first cover plate is adhesively bonded to the outer flanging, and the second cover plate is pressed against the inner flanging by a pressing piece, and the pressing piece is installed on the inner flanging; the first cover plate, the outer flanging, the middle frame, the inner flanging, and the second cover plate enclose to form the insulation chamber.

3. The heat-insulating door body structure according to claim 2, wherein The inner peripheral edge of the inner flanging sinks towards the direction close to the first cover plate to form a concave portion; the second cover plate is pressed against the concave portion by the pressing piece, and the pressing piece is installed on the concave portion.

4. A heat-insulating door body structure according to claim 3, characterized in that, A notch is provided at the edge of the second cover plate, and the notch is used to make way for the connection between the pressing piece and the concave portion, and the pressing piece presses on the edge of the notch of the second cover plate.

5. A heat-insulating door body structure according to claim 4, characterized in that, A concave platform is provided at the edge of the second cover plate, the notch is arranged in the concave platform, the pressing piece presses on the bottom surface of the concave platform and the pressing piece does not protrude from the concave platform.

6. The heat-insulating door body structure according to claim 5, characterized in that, It further includes a sealing strip, the sealing strip is arranged at the edge of the second cover plate and covers the concave platform, and the sealing strip protrudes from the concave portion when not being squeezed.

7. A heat-insulating door body structure according to any one of claims 2-6, characterized in that, The edge of the first cover plate is adhesively bonded to the side of the outer flanging away from the second cover plate.

8. A heat-insulating door body structure according to any one of claims 2-6, characterized in that, A magnetic part is provided on the side of the inner flanging away from the outer flanging.

9. The heat-insulating door body structure according to claim 1, wherein, The doorframe body includes an outer flanging and a middle frame, the middle frame is annularly closed, the edge of the first cover plate is adhesively bonded to the inner side of the outer flanging, a sealing gasket is provided on the side of the first cover plate away from the outer flanging, the second cover plate is pressed on the sealing gasket by a pressing piece, and the pressing piece is installed on the outer flanging; the first cover plate, the sealing gasket, and the second cover plate enclose to form the insulation chamber.

10. A heat-insulating door body structure according to claim 9, characterized in that, The doorframe body further includes an inner flanging.

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