Arc-shaped door pocket

Abstract

The utility model relates to the technical field of indoor decoration, in particular to an arc-shaped door pocket which comprises a door opening, a front door frame, a rear door frame and a connecting piece, the U-shaped connecting piece with a downward opening is arranged in the door opening, and the front door frame wrapping the outer side of an external corner in front of the door opening is fixedly installed on the front side of the connecting piece. The side face, located in front of the door opening, of the front door frame is in arc transition with the side face located in the door opening, and a rear door frame wrapping the outer side of an external corner behind the door opening is fixedly installed on the rear side of the connecting piece. The door is reasonable and compact in structure and convenient to use, the side face, located in front of the door opening, of the front door frame is in arc transition with the side face in the door opening, the side face, located behind the door opening, of the rear door frame is in arc transition with the side face in the door opening, and therefore the front door frame and the rear door frame can be conveniently formed; in this way, the manufacturing and installing processes of a door stop strip of a traditional door pocket line can be reduced, the installing time of the arc-shaped door pocket is shortened, and the installing efficiency of the arc-shaped door pocket is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of indoor decoration and is a curved door cover. Background Art

[0002] At present, the set door frame is generally composed of a door frame plate, a door stopper strip, a door frame decorative strip and a sealing strip. The door frame plate is installed on the wall of the door opening, and then the door stopper strip, door frame decorative strip and sealing strip are installed. The door frame must be customized according to the thickness of the wall. The door frame has no adjustability or very little adjustability. There are the following shortcomings in the production and installation process: First, when the wall thickness changes due to measurement errors or plastering and modification, the thickness of the door frame will be too large or too small, making it difficult to install the door frame or even scrapped; second, the door frame plate requires a whole piece of material and cannot be spliced, which has high requirements for wood; third, the door frame cannot be pre-processed and produced in the factory. It must wait until the accurate size is measured on site before it can be produced, and it is impossible to achieve factory mass production, which brings bottlenecks to production and sales and prolongs the construction period of the project.

[0003] The Chinese patent document with the announcement number CN216974549U discloses a new type of wood-plastic door stopper, including: a door frame, two side door stoppers and an upper door stopper are arranged on the inner wall of the door frame, the two side door stoppers are in contact with the inner wall of the door frame, the upper door stopper is in contact with the upper top wall of the door frame, and the two ends of the upper door stoppers on the two side door stoppers are in contact with each other; nine fixing components, the fixing components include a clamping block and a sliding block, and the opposite sides of the two side door stoppers and the upper surface of the upper door stopper are both slidably connected with the three clamping blocks. During installation, the door stopper and the door frame need to be made and installed separately, which increases the manufacturing process and installation process of the door stopper and the door frame, reduces the overall installation efficiency of the door frame, and at the same time, the gap between the door stopper and the door frame will gradually increase over time, thereby affecting the overall aesthetics of the door frame.

[0004] The Chinese patent document with the announcement number CN208416289U discloses a split door cover, including a door stop strip and a door cover plate. At least one connecting column is arranged on one side edge where the door stop strip is connected to the door cover plate. A connecting port that matches the connecting column is opened on one side edge where the door cover plate is connected to the door stop strip. The connecting column is inserted into the connecting port and the connecting column is tightly matched with the inner wall of the connecting port. The utility model has a split door cover, wherein the connecting column is made of elastic material, and the outer wall of the connecting column is provided with a plurality of barbs that are larger and smaller along the plug-in direction, and each of the barbs is arranged in sequence along the length direction of the connecting column, and each of the barbs is interference-fitted with the inner wall of the connecting port. The utility model has a split door cover, wherein the door stop strip and the connecting column are both made of wood-plastic material. The split structure of the stop strip and the door body still increases the manufacturing process and installation process of the door stop strip and the door cover, and reduces the overall installation efficiency of the door cover. Summary of the invention

[0005] The utility model provides an arc-shaped door cover, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that the existing door cover and the stop bar are separated and have complicated manufacturing and installation processes.

[0006] The technical solution of the utility model is achieved through the following measures: an arc-shaped door frame, including a door opening, and also including a front door frame, a rear door frame and a connecting piece. A U-shaped connecting piece with a downward opening is provided in the door opening. A front door frame wrapped around the outer side of the front positive angle of the door opening is fixedly installed on the front side of the connecting piece. The side surface of the front door frame located in front of the door opening and the side surface located in the door opening have an arc transition. A rear door frame wrapped around the outer side of the rear positive angle of the door opening is fixedly installed on the rear side of the connecting piece. The side surface of the rear door frame located behind the door opening and the side surface located in the door opening have an arc transition.

[0007] The following are further optimizations and / or improvements to the above utility model technical solution:

[0008] The above-mentioned connecting member may include a first connecting plate, a second connecting plate and a third connecting plate arranged in sequence along the inner wall of the door opening, the upper side of the first connecting plate and the left side of the second connecting plate are fixedly installed together, and the right side of the second connecting plate and the upper side of the third connecting plate are fixedly installed together.

[0009] The above-mentioned front door frame may include a first main door frame, a second main door frame and a third main door frame which are wrapped in sequence along the inner wall of the door opening on the outside of the positive angle in front of the door opening. The first main door frame is L-shaped, and the front side of the first main door frame transitions to the right side in a circular arc. The second main door frame and the third main door frame have the same structure as the first main door frame. The right rear side of the first main door frame is fixedly installed together with the left front side of the first connecting plate, the lower rear side of the second main door frame is fixedly installed together with the upper front side of the second connecting plate, and the left rear side of the third main door frame is fixedly installed together with the right front side of the third connecting plate.

[0010] The right rear side of the above-mentioned first main door frame can be provided with a first front plug-in groove that passes through from top to bottom and opens backwards, and the first connecting plate is fixed with a first front plug-in block plugged into the first front plug-in groove on the left front side. The lower rear side of the second main door frame is provided with a second front plug-in groove that passes through from left to right and opens backwards, and the upper front side of the second connecting plate is fixed with a second front plug-in block plugged into the second front plug-in groove. The left rear side of the third main door frame is provided with a third front plug-in groove that passes through from top to bottom and opens backwards, and the left front side of the third connecting plate is fixed with a third front plug-in block plugged into the third front plug-in groove.

[0011] The distance between the right side of the first main door frame and the left side of the third main door frame is greater than the distance between the right side of the first connecting plate and the left side of the third connecting plate.

[0012] A lock hole opening to the right may be provided on the right middle part of the first main door frame corresponding to the front position of the first connecting plate, and a plurality of hinge grooves opening to the left may be provided at intervals above and below on the left front part of the third main door frame corresponding to the front position of the third connecting plate.

[0013] The first connecting plate corresponding to the right side of the first main door frame can be provided with a first sealing groove which passes through from top to bottom and opens forward, and a first sealing strip is fixedly installed in the first sealing groove; the second connecting plate corresponding to the lower side of the second main door frame is provided with a second sealing groove which passes through from left to right and opens forward, and a second sealing strip is fixedly installed in the second sealing groove; the third connecting plate corresponding to the left side of the third main door frame is provided with a third sealing groove which passes through from top to bottom and opens forward, and a third sealing strip is fixedly installed in the third sealing groove.

[0014] The above-mentioned rear door frame may include a first sub-door frame, a second sub-door frame and a third sub-door frame which are wrapped in sequence along the inner wall of the door opening on the outer side of the rear positive angle of the door opening, the first sub-door frame is L-shaped, and the rear side of the first sub-door frame transitions to the right side in a circular arc, the second sub-door frame and the third sub-door frame have the same structure as the first sub-door frame, the right front side of the first sub-door frame is fixedly installed together with the left rear side of the first connecting plate, the lower front side of the second sub-door frame is fixedly installed together with the upper rear side of the second connecting plate, and the left front side of the third sub-door frame is fixedly installed together with the right rear side of the third connecting plate.

[0015] The first auxiliary door frame can be provided with a first rear plug-in groove that passes through from top to bottom and opens forward on the right front side of the first auxiliary door frame, a first rear plug-in block inserted in the first rear plug-in groove is fixed on the left rear side of the first connecting plate, a second rear plug-in groove that passes through from left to right and opens forward is provided on the lower front side of the second auxiliary door frame, a second rear plug-in block inserted in the second rear plug-in groove is fixed on the upper rear side of the second connecting plate, a third rear plug-in groove that passes through from top to bottom and opens forward is provided on the left front side of the third auxiliary door frame, and a third rear plug-in block inserted in the third rear plug-in groove is fixed on the upper rear side of the third connecting plate.

[0016] The utility model has a reasonable and compact structure and is easy to use. The side of the front door frame located in front of the door opening and the side located inside the door opening have a circular arc transition, and the side of the rear door frame located behind the door opening and the side located inside the door opening have a circular arc transition, which is convenient for the molding of the front door frame and the rear door frame. Through such an arrangement, the production and installation process of the door stop strips of the traditional door frame can be reduced, the installation time of the curved door frame in the present application is shortened, and the installation efficiency of the curved door frame is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic diagram of the main structure of embodiments one to nine of the present utility model.

[0018] Attached Figure 2 It is a schematic diagram of the partial cross-sectional structure of the left side view of embodiments one to nine of the utility model.

[0019] Attached Figure 3 The top view and cross-sectional view of the utility model are shown in FIG. Figure 1 .

[0020] Attached Figure 4 The top view and cross-sectional view of the utility model are shown in FIG. Figure 2 .

[0021] Attached Figure 5 For attachment Figure 3 Schematic diagram of the enlarged top view of the first connecting plate.

[0022] Attached Figure 6 For attachment Figure 3 A top-down enlarged structural diagram of the first main door frame.

[0023] Attached Figure 7 For attachment Figure 3 A top-down enlarged structural diagram of the first door frame.

[0024] Attached Figure 8 For attachment Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0025] The codes in the accompanying drawings are: 1 is the positive angle in front of the door opening, 2 is the first connecting plate, 3 is the second connecting plate, 4 is the third connecting plate, 5 is the first main door frame, 6 is the second main door frame, 7 is the third main door frame, 8 is the first front plug-in block, 9 is the second front plug-in block, 10 is the third front plug-in block, 11 is the lock hole, 12 is the hinge groove, 13 is the first sealing strip, 14 is the second sealing strip, 15 is the third sealing strip, 16 is the first secondary door frame, 17 is the second secondary door frame, 18 is the third secondary door frame, 19 is the first rear plug-in block, 20 is the second rear plug-in block, 21 is the third rear plug-in block, and 22 is the positive angle behind the door opening. DETAILED DESCRIPTION

[0026] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0027] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0028] The present invention is further described below in conjunction with the embodiments and drawings:

[0029] Embodiment 1: As shown in the attached Figures 1 to 4 As shown, the curved door frame includes a door opening, and also includes a front door frame, a rear door frame and a connecting piece. A U-shaped connecting piece opening downward is provided in the door opening, and a front door frame wrapped around the outside of a positive angle 1 in front of the door opening is fixedly installed on the front side of the connecting piece. The side of the front door frame located in front of the door opening and the side located in the door opening have an arc transition. The rear side of the connecting piece is fixedly installed with a rear door frame wrapped around the outside of a positive angle 22 at the rear of the door opening. The side of the rear door frame located behind the door opening and the side located in the door opening have an arc transition.

[0030] According to the requirements, the front door frame, the rear door frame and the connecting piece can also be installed on the outside of the two positive corners on the side of the wall. During use, the side of the front door frame located in front of the door opening and the side located inside the door opening are in a circular arc transition, and the side of the rear door frame located behind the door opening and the side located inside the door opening are in a circular arc transition, which is convenient for the molding of the front door frame and the rear door frame. Through such a setting, the production and installation process of the door stop strip of the traditional door frame can be reduced, the installation time of the curved door frame in this application is shortened, and the installation efficiency of the curved door frame is improved.

[0031] The above-mentioned curved door frame can be further optimized and / or improved according to actual needs:

[0032] Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figures 2 to 5 As shown in Figures 6, the connecting member includes a first connecting plate 2, a second connecting plate 3 and a third connecting plate 4 which are sequentially arranged along the inner wall of the door opening. The upper side of the first connecting plate 2 and the left side of the second connecting plate 3 are fixedly installed together, and the right side of the second connecting plate 3 and the upper side of the third connecting plate 4 are fixedly installed together.

[0033] According to the requirements, the upper side of the first connecting plate 2 and the left side of the second connecting plate 3 are both provided with a 45-degree cut angle, and the right side of the second connecting plate 3 and the upper side of the third connecting plate 4 are both provided with a 45-degree cut angle, so that the contact area between the second connecting plate 3 and the first connecting plate 2 and the third connecting plate 4 can be increased, which is convenient for the reliable fixation of the first connecting plate 2, the second connecting plate 3 and the third connecting plate 4. The first connecting plate 2, the second connecting plate 3 and the third connecting plate 4 can all be density boards. In the process of use, through such a setting, the length of the connecting plate can be cut according to different door opening sizes, so that a standard door cover can be made, which is convenient for the installation of the front door frame and the rear door frame.

[0034] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown in Figures 3, 6 and 8, the front door frame includes a first main door frame 5, a second main door frame 6 and a third main door frame 7 which are sequentially wrapped along the inner wall of the door opening and around the outer side of the positive angle 1 in front of the door opening. The first main door frame 5 is L-shaped, and the front side of the first main door frame 5 transitions to the right side in a circular arc. The second main door frame 6 and the third main door frame 7 have the same structure as the first main door frame 5. The right rear side of the first main door frame 5 is fixedly mounted to the left front side of the first connecting plate 2, the lower rear side of the second main door frame 6 is fixedly mounted to the upper front side of the second connecting plate 3, and the left rear side of the third main door frame 7 is fixedly mounted to the right front side of the third connecting plate 4.

[0035] According to the requirements, the upper side of the first main door frame 5 and the left side of the second main door frame 6 are both provided with an inclined surface with the left portion tilted upward by 45 degrees relative to the right portion, and the right side of the second main door frame 6 and the upper side of the third main door frame 7 are both provided with an inclined surface with the right portion tilted upward by 45 degrees relative to the left portion. In this way, the contact surfaces of the first main door frame 5 and the second main door frame 6 and the contact surfaces of the second main door frame 6 and the third main door frame 7 are more beautiful, the front side of the first main door frame 5 and the right side are transitioned into an arc, the second main door frame 6 and the third main door frame 7 have the same structure as the first main door frame 5, and the material of the first main door frame 5, the second main door frame 6 and the third main door frame 7 can all be wood-plastic material, which is convenient for stretching and molding of wood-plastic material. The outer sides of the first main door frame 5, the second main door frame 6 and the third main door frame 7 can also be coated with triamine paper or PVC or CPL or baking paint, which improves the production efficiency of the first main door frame 5, the second main door frame 6 and the third main door frame 7, can increase the development of various product styles, and improve the diversity of the main door frames.

[0036] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figures 2 to 5As shown in , 8, the first main door sleeve 5 is provided with a first front plug-in groove which passes through from top to bottom and opens backwards on the right rear side, the first connecting plate 2 is fixed with a first front plug-in block 8 which is plugged into the first front plug-in groove on the left front side, the second main door sleeve 6 is provided with a second front plug-in groove which passes through from left to right and opens backwards on the lower rear side, the second connecting plate 3 is fixed with a second front plug-in block 9 which is plugged into the second front plug-in groove on the upper front side, the third main door sleeve 7 is provided with a third front plug-in groove which passes through from top to bottom and opens backwards on the left rear side, and the third connecting plate 4 is fixed with a third front plug-in block 10 which is plugged into the third front plug-in groove on the left front side.

[0037] According to the requirements, the first front plug-in block 8 and the first connecting plate 2, the second front plug-in block 9 and the second connecting plate 3, and the third plug-in block and the third connecting plate 4 all form a front lock groove, so that the right rear side of the first main door cover 5 and the left front side of the first connecting plate 2, the lower rear side of the second main door cover 6 and the upper front side of the second connecting plate 3, and the left rear side of the third main door cover 7 and the right front side of the third connecting plate 4 are plugged together. In this way, the overall strength of the main door cover and the connecting plate can be improved, and cracking at the connection between the door cover and the connecting plate can be avoided. Through such a setting, the overall load-bearing capacity can also be improved, which is convenient for deformation after the door leaf is installed.

[0038] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 3 , 4 As shown, the distance between the right side of the first main door frame 5 and the left side of the third main door frame 7 is greater than the distance between the right side of the first connecting plate 2 and the left side of the third connecting plate 4.

[0039] During use, such a setting can avoid installing door stop strips on the connecting plate, simplify the installation process of the door frame, improve the production and installation efficiency of the door frame, and also avoid the problem of easy cracking at the connection between the ordinary door frame wire plug-in plate and the stop strip.

[0040] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figure 3 , 4 As shown in 8, a lock hole 11 opening to the right is provided on the right middle part of the first main door frame 5 corresponding to the front position of the first connecting plate 2, and a plurality of hinge grooves 12 opening to the left are provided at intervals at upper and lower parts on the left front part of the third main door frame 7 corresponding to the front position of the third connecting plate 4.

[0041] During use, the hinge groove 12 is provided to facilitate the installation of the door leaf, and the lock hole 11 is provided to facilitate the installation of the lock block, which can reduce the subsequent secondary processing of the door frame and improve the installation efficiency of the door frame.

[0042] Embodiment 7: As an optimization of the above embodiment, as shown in the attached Figure 2 , 3As shown in , 4 and 8, the first connecting plate 2 corresponding to the right position of the first main door frame 5 is provided with a first sealing groove which passes through from top to bottom and opens forward, and a first sealing strip 13 is fixedly installed in the first sealing groove; the second connecting plate 3 corresponding to the lower position of the second main door frame 6 is provided with a second sealing groove which passes through from left to right and opens forward, and a second sealing strip 14 is fixedly installed in the second sealing groove; the third connecting plate 4 corresponding to the left position of the third main door frame 7 is provided with a third sealing groove which passes through from top to bottom and opens forward, and a third sealing strip 15 is fixedly installed in the third sealing groove.

[0043] According to the requirements, the first sealing strip 13, the second sealing strip 14 and the third sealing strip 15 are all existing well-known technologies. The first sealing strip 13 may also include a sealing body, a fixing part and a supporting part. The sealing body is a right triangle. One of the right-angled sides of the sealing body contacts the right side of the first main door frame 5, and the other right-angled side of the sealing body contacts the front side of the right part of the first connecting plate 2. A fixing part in a fishbone shape and fixedly installed in the first sealing groove is fixed to the rear side of the sealing body. A supporting part of a plate-like structure is fixed to the front side of the middle part of the sealing body. The front side of the supporting part is flush with the front side of the left end of the sealing body. The second sealing strip 14 and the third sealing strip 15 have the same structure as the first sealing strip 13. In use, through such a setting, the sealing between the door leaf and the door frame can be improved, and the sound insulation effect of the room can also be improved. It can also play a buffering role on the door leaf to prevent the door leaf from being damaged after collision with the door frame.

[0044] Embodiment 8: As an optimization of the above embodiment, as shown in the attached Figure 2 , 3 As shown in Figures 4 and 7, the rear door frame includes a first sub-door frame 16, a second sub-door frame 17 and a third sub-door frame 18 which are sequentially wrapped along the inner wall of the door opening and around the outer side of the rear positive angle 22 of the door opening. The first sub-door frame 16 is L-shaped, and the rear side of the first sub-door frame 16 transitions to the right side in a circular arc. The second sub-door frame 17 and the third sub-door frame 18 have the same structure as the first sub-door frame 16. The right front side of the first sub-door frame 16 is fixedly mounted to the left rear side of the first connecting plate 2, the lower front side of the second sub-door frame 17 is fixedly mounted to the upper rear side of the second connecting plate 3, and the left front side of the third sub-door frame 18 is fixedly mounted to the right rear side of the third connecting plate 4.

[0045] According to the requirements, the upper side of the first door cover 16 and the left side of the second door cover 17 are both provided with an inclined surface with the left portion tilted upward by 45 degrees relative to the right portion, and the right side of the second door cover 17 and the upper side of the third door cover 18 are both provided with an inclined surface with the right portion tilted upward by 45 degrees relative to the left portion, so that the contact surface of the first door cover 16 and the second door cover 17 and the contact surface of the second door cover 17 and the third door cover 18 are more beautiful, the rear side of the first door cover 16 and the right side are transitioned into an arc, and the second and third door covers 17 and 18 are more beautiful. 18 has the same structure as the first secondary door cover 16. The materials of the first secondary door cover 16, the second secondary door cover 17 and the third secondary door cover 18 are all wood-plastic materials, which is convenient for stretching and molding of the wood-plastic materials. The outer sides of the first secondary door cover 16, the second secondary door cover 17 and the third secondary door cover 18 can also be coated with triamine paper or PVC or CPL or baking paint, which improves the production efficiency of the first secondary door cover 16, the second secondary door cover 17 and the third secondary door cover 18, can increase the development of various styles of products, and improve the diversity of the secondary door covers.

[0046] Embodiment 9: As an optimization of the above embodiment, as shown in the attached Figures 2 to 5 As shown, the first auxiliary door frame 16 is provided with a first rear plug-in groove penetrating from top to bottom and opening forward on the right front side, the first connecting plate 2 is fixed with a first rear plug-in block 19 inserted in the first rear plug-in groove on the left rear side, the second auxiliary door frame 17 is provided with a second rear plug-in groove penetrating from left to right and opening forward on the lower front side, the second connecting plate 3 is fixed with a second rear plug-in block 20 inserted in the second rear plug-in groove on the upper rear side, the third auxiliary door frame 18 is provided with a third rear plug-in groove penetrating from top to bottom and opening forward on the left front side, and the third connecting plate 4 is fixed with a third rear plug-in block 21 inserted in the third rear plug-in groove on the upper rear side.

[0047] According to the requirements, the first rear plug-in block 19 and the first connecting plate 2, the second rear plug-in block 20 and the second connecting plate 3, and the third rear plug-in block and the third connecting plate 4 all form rear locking grooves, so that the right front side of the first auxiliary door cover 16 and the left rear side of the first connecting plate 2, the lower front side of the second auxiliary door cover 17 and the upper rear side of the second connecting plate 3, and the left front side of the third auxiliary door cover 18 and the right rear side of the third connecting plate 4 are plugged together. In this way, the overall strength of the auxiliary door cover and the connecting plate can be improved, and cracking at the connection between the auxiliary door cover and the connecting plate can be avoided. Through such a setting, the overall load-bearing capacity can also be improved.

[0048] The above technical features respectively constitute various embodiments of the present utility model, which have strong adaptability and implementation effect, and non-essential technical features can be added or reduced according to actual needs to meet the needs of different situations.

Claims

1. A curved door frame, including a door opening, characterized in that It also includes a front door frame, a rear door frame and a connecting piece, a U-shaped connecting piece with a downward opening is provided in the door opening, a front door frame wrapped around the outside of the positive angle in front of the door opening is fixedly installed on the front side of the connecting piece, the side of the front door frame located in front of the door opening and the side located in the door opening have an arc transition, and a rear door frame wrapped around the outside of the positive angle behind the door opening is fixedly installed on the rear side of the connecting piece, the side of the rear door frame located behind the door opening and the side located in the door opening have an arc transition.

2. The curved door frame according to claim 1, characterized in that The connecting piece includes a first connecting plate, a second connecting plate and a third connecting plate arranged in sequence along the inner wall of the door opening. The upper side of the first connecting plate and the left side of the second connecting plate are fixedly installed together, and the right side of the second connecting plate and the upper side of the third connecting plate are fixedly installed together.

3. The curved door frame according to claim 2, characterized in that The front door frame includes a first main door frame, a second main door frame and a third main door frame which are wrapped in sequence along the inner wall of the door opening and on the outside of the positive angle in front of the door opening. The first main door frame is L-shaped, and the front side of the first main door frame transitions to the right side in a circular arc. The second main door frame and the third main door frame have the same structure as the first main door frame. The right rear side of the first main door frame is fixedly installed together with the left front side of the first connecting plate, the lower rear side of the second main door frame is fixedly installed together with the upper front side of the second connecting plate, and the left rear side of the third main door frame is fixedly installed together with the right front side of the third connecting plate.

4. The curved door frame according to claim 3, characterized in that A first front plug-in groove is provided on the right rear side of the first main door sleeve, which is through from top to bottom and opens backward; a first front plug-in block is fixed on the left front side of the first connecting plate and is plugged into the first front plug-in groove; a second front plug-in groove is provided on the lower rear side of the second main door sleeve, which is through from left to right and opens backward; a second front plug-in block is fixed on the upper front side of the second connecting plate and is plugged into the second front plug-in groove; a third front plug-in groove is provided on the left rear side of the third main door sleeve, which is through from top to bottom and opens backward; a third front plug-in block is fixed on the left front side of the third connecting plate and is plugged into the third front plug-in groove.

5. The curved door frame according to claim 3 or 4, characterized in that The distance between the right side of the first main door frame and the left side of the third main door frame is greater than the distance between the right side of the first connecting plate and the left side of the third connecting plate.

6. The curved door frame according to claim 5, characterized in that A lock hole opening to the right is provided on the right middle part of the first main door frame corresponding to the front position of the first connecting plate, and a plurality of hinge grooves opening to the left are provided at intervals at upper and lower intervals on the left front part of the third main door frame corresponding to the front position of the third connecting plate; or / and, a first sealing groove penetrating from top to bottom and opening forward is provided on the front right side of the first connecting plate corresponding to the right side of the first main door frame, and a first sealing strip is fixedly installed in the first sealing groove, a second sealing groove penetrating from left to right and opening forward is provided on the front lower part of the second connecting plate corresponding to the lower part of the second main door frame, and a second sealing strip is fixedly installed in the second sealing groove, and a third sealing groove penetrating from top to bottom and opening forward is provided on the front left side of the third connecting plate corresponding to the left side of the third main door frame, and a third sealing strip is fixedly installed in the third sealing groove.

7. The curved door frame according to claim 2, 3, 4 or 6, characterized in that The rear door frame includes a first, second and third door frames which are wrapped along the inner wall of the door opening in sequence on the outer side of the rear positive angle of the door opening. The first door frame is L-shaped, and the rear side of the first door frame transitions to the right side in a circular arc. The second and third door frames have the same structure as the first door frame. The right front side of the first door frame is fixedly mounted to the left rear side of the first connecting plate, the lower front side of the second door frame is fixedly mounted to the upper rear side of the second connecting plate, and the left front side of the third door frame is fixedly mounted to the right rear side of the third connecting plate.

8. The curved door frame according to claim 5, characterized in that The rear door frame includes a first, second and third door frames which are wrapped along the inner wall of the door opening in sequence on the outer side of the rear positive angle of the door opening. The first door frame is L-shaped, and the rear side of the first door frame transitions to the right side in a circular arc. The second and third door frames have the same structure as the first door frame. The right front side of the first door frame is fixedly mounted to the left rear side of the first connecting plate, the lower front side of the second door frame is fixedly mounted to the upper rear side of the second connecting plate, and the left front side of the third door frame is fixedly mounted to the right rear side of the third connecting plate.

9. The curved door frame according to claim 7, characterized in that A first rear plug-in slot is provided on the front right side of the first auxiliary door frame, which runs through from top to bottom and opens forward; a first rear plug-in block is fixed on the rear left side of the first connecting plate and is plugged into the first rear plug-in slot; a second rear plug-in slot is provided on the front lower side of the second auxiliary door frame, which runs through from left to right and opens forward; a second rear plug-in block is fixed on the rear upper side of the second connecting plate and is plugged into the second rear plug-in slot; a third rear plug-in slot is provided on the front left side of the third auxiliary door frame, which runs through from top to bottom and opens forward; a third rear plug-in block is fixed on the rear upper side of the third connecting plate and is plugged into the third rear plug-in slot.

10. The curved door frame according to claim 8, characterized in that A first rear plug-in slot is provided on the front right side of the first auxiliary door frame, which runs through from top to bottom and opens forward; a first rear plug-in block is fixed on the rear left side of the first connecting plate and is plugged into the first rear plug-in slot; a second rear plug-in slot is provided on the front lower side of the second auxiliary door frame, which runs through from left to right and opens forward; a second rear plug-in block is fixed on the rear upper side of the second connecting plate and is plugged into the second rear plug-in slot; a third rear plug-in slot is provided on the front left side of the third auxiliary door frame, which runs through from top to bottom and opens forward; a third rear plug-in block is fixed on the rear upper side of the third connecting plate and is plugged into the third rear plug-in slot.

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