A double-opening mother-and-son door with inside and outside opening and its installation method

Abstract

The present invention relates to the technical field of mother - and - son doors, and in particular to an inside - and - outside double - opening mother - and - son door and its installation method, which includes a door frame, door leaves, and a limit component. Among them, the door frame includes two vertical door frames and an upper horizontal door frame arranged at the ends of the two vertical door frames; the door leaves include a mother - door panel and a son - door panel. One side of the mother - door panel and the son - door panel is respectively hinged to the two vertical door frames. A two - way lock is arranged on the mating surface where the mother - door panel and the son - door panel cooperate with each other. A first door lock is arranged on the mother - door panel, and a second door lock is arranged on the son - door panel; the first door lock and the second door lock independently control the two - way lock; the limit component is arranged along the direction of the mating surface towards the two vertical door frames, and includes a mother - door limit component and a son - door limit component respectively arranged on the opposite sides of the opening directions of the mother - door panel and the son - door panel. The mother - door limit component and the son - door limit component are located on both sides of the door frame. The present invention realizes the functions that the mother - door and the son - door can open in different directions and can be opened simultaneously, and the opening of the door leaves is not restricted.

Description

Technical Field

[0001] The present invention relates to the technical field of mother - and - son doors, and particularly to a double - opening mother - and - son door for both indoor and outdoor use. Background Art

[0002] A mother - and - son door is a special double - leaf pair - opening door, which is composed of a door leaf with a smaller width (son door) and a door leaf with a larger width (mother door). The whole door is relatively beautiful. Generally, when the width of the door opening is large, for the overall beauty of the door, the door leaves are designed in the form of a large and a small mother - and - son. In this way, when opening and closing the door for people to pass through, there is no need to push a very large door leaf; or half of the double - leaf door is too small to facilitate passage. When large objects such as furniture need to pass through, the door can be fully opened.

[0003] In the prior art, the door leaves of common wooden mother - and - son doors can only be opened in the same direction, either towards the indoor or outdoor direction. When opening, only one door leaf can be opened first to open the other door leaf, and the door lock is installed on the mother - door leaf. In the closed state, the son door cannot be independently opened, which has certain limitations.

[0004] The information disclosed in this background - art section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0005] The first object of the present invention is to provide a double - opening mother - and - son door for both indoor and outdoor use, so that the mother - door panel and the son - door panel have different opening directions, and both the mother - door panel and the son - door panel can independently control the door lock to open, and the opening of the door leaf is not restricted.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A double - opening mother - and - son door for both indoor and outdoor use, comprising a door frame, a door leaf and a limiting component, wherein,

[0008] The door frame includes two vertical door frames and an upper horizontal door frame arranged at the ends of the two vertical door frames;

[0009] The door leaf includes a mother - door panel and a son - door panel. One side of the mother - door panel and the son - door panel is respectively hinged to the two vertical door frames. A two - way lock is arranged on the mating surface where the mother - door panel and the son - door panel cooperate with each other. A first door lock is arranged on the mother - door panel, and a second door lock is arranged on the son - door panel; the first door lock and the second door lock independently control the two - way lock;

[0010] The limiting component is arranged along the direction of the mating surface towards the two vertical door frames, and includes a mother - door limiting component and a son - door limiting component respectively arranged on the opposite sides of the opening directions of the mother - door panel and the son - door panel. The mother - door limiting component and the son - door limiting component are located on both sides of the door frame.

[0011] Furthermore, the double-sided lock includes a first lock core and a second lock core that are centrosymmetric and connected. Both the first lock core and the second lock core include a connecting bridge and lock tongues arranged at both ends of the connecting bridge. The first lock core and the second lock core rotate in the same direction. The lock tongue at the tail end of the first lock core is connected to the lock tongue at the head end of the second lock core to form a first connection surface, and the lock tongue at the head end of the first lock core is connected to the lock tongue at the tail end of the second lock core to form a second connection surface. When the first connection surface and the second connection surface are coplanar with the mating surface, the double-sided lock is opened; when the first connection surface and the second connection surface are misaligned with the mating surface, the double-sided lock is closed.

[0012] Furthermore, the mother door limit component is arranged along the direction of the mating surface towards the vertical door frame hinged to the mother door panel, and includes a first anti-collision rubber strip and a first limit bar; the first anti-collision rubber strip is located between the door frame and the first limit bar. When the mother door panel contacts the first anti-collision rubber strip, the first anti-collision rubber strip deforms and has a certain elastic force on the mother door panel.

[0013] The sub-door limit component is arranged along the direction of the mating surface towards the vertical door frame hinged to the sub-door panel, and includes a second anti-collision rubber strip and a second limit bar; the second anti-collision rubber strip is located between the door frame and the second limit bar. When the sub-door panel contacts the second anti-collision rubber strip, the second anti-collision rubber strip deforms and has a certain elastic force on the sub-door panel.

[0014] Furthermore, it further includes a fixing component, which is arranged at the junction of the upper horizontal door frame and the mating surface and is used to fix the double-leaf inside-outside opening mother and sub-doors when the mother door panel and / or the sub-door panel are closed.

[0015] Furthermore, the fixing component includes a first magnet respectively arranged at the top of the mother door panel and a second magnet arranged at the corresponding position on the upper horizontal door frame. The attractive force between the first magnet and the second magnet is less than the pulling force when the mother door panel and the sub-door panel are opened.

[0016] Furthermore, it further includes a double-sided double-control automatic sealing component, which includes an automatic seal and door frame connecting members arranged at both ends of the automatic seal. The automatic seal is arranged on the side of the upper horizontal door frame facing the door leaf, and the door frame connecting members are arranged at the connection of the vertical door frame and the upper horizontal door frame.

[0017] Furthermore, the automatic seal includes a first seal, a second seal and a fixed connecting piece. The fixed connecting piece is arranged at the junction of the upper horizontal door frame and the mating surface, and the first seal and the second seal are respectively arranged at both ends of the fixed connecting piece; the two door frame connecting members are respectively connected to the free ends of the first seal and the second seal.

[0018] Further, a first groove is provided at one end of the vertical doorframe close to the upper horizontal doorframe, and a second groove is provided on the side surface of the upper horizontal doorframe facing the vertical doorframe; the doorframe connecting member is arranged in the first groove, and the automatic seal is arranged in the second groove.

[0019] Further, each doorframe connecting member includes a housing and a telescopic assembly arranged inside the housing. A first mounting hole and a second mounting hole are formed on one side of the housing facing the automatic seal, and the telescopic assembly passes through the second mounting hole and is arranged towards the outside of the housing; the free ends of the first seal and the second seal respectively extend into the first mounting hole and abut against the telescopic assembly.

[0020] Further, a bottom automatic seal is also provided at the bottoms of the mother door panel and the child door panel, and the bottom automatic seal automatically rebounds and resets when the door leaf is opened.

[0021] The second object of the present invention is to provide an installation method for an inside-outside double-opening mother-child door, including the following operating steps:

[0022] S01: Install the doorframe, and install the upper horizontal doorframe at the ends of the two vertical doorframes;

[0023] S02: Set the mother door limit assembly and the child door limit assembly on the opposite side of the opening directions of the mother door panel and the child door panel according to the installation requirements;

[0024] S03: Use hinges to install the mother door panel and the child door panel on the vertical doorframe;

[0025] S04: Set a two-way lock on the mating surface where the mother door panel and the child door panel cooperate with each other.

[0026] The beneficial effects of the present invention are as follows:

[0027] (1) By arranging the limit assembly along the mating surface towards the two vertical doorframes, the opening directions of the mother door panel and the child door panel are opposite. At the same time, by setting a two-way lock on the mating surface where the mother door panel and the child door panel cooperate with each other, the first door lock on the mother door panel and the second door lock on the child door panel independently control the two-way lock; realizing the functions that the mother door panel and the child door panel have different opening directions and can be opened simultaneously, and the upper horizontal doorframe automatic seal can be controlled separately, and the opening of the door leaf is not restricted. Compared with the prior art, the present invention avoids the limitation that the child door cannot be independently opened in the actual use of the mother-child door, and improves the application effect of the mother-child door.

[0028] (2) The inside-outside double-opening mother-child door set in the present invention can be assembled and installed on-site. The vertical doorframes are universal on the left and right. Only the upper horizontal doorframe needs to use a retaining strip to distinguish the opening directions of the mother and child doors during installation, and the position of the doorframe retaining strip can be adjusted according to the actual installation. Compared with the prior art, the installation efficiency, error tolerance rate, etc. are greatly increased, and the labor cost is greatly reduced.

[0029] (3) The double-opening inner and outer mother-and-son doors provided by the present invention are convenient for the use of the elderly and in specific places. When a special situation occurs indoors and the indoor scene cannot be determined, the rescue personnel can also open the door that opens outward to the outside for timely rescue, meeting the fire protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the double-opening inner and outer mother-and-son doors in the embodiment of the present invention;

[0032] Figure 2 It is an exploded view of the double-opening inner and outer mother-and-son doors in Embodiment 1 of the present invention;

[0033] Figure 3 It is an exploded view of the double-opening inner and outer mother-and-son doors in Embodiment 2 of the present invention;

[0034] Figure 4 It is an exploded view of the double-sided double-control automatic sealing assembly in Embodiment 2 of the present invention;

[0035] Figure 5 It is Figure 4 a partial enlarged view of A in

[0036] Figure 6 It is a schematic structural diagram of the upper horizontal door frame in Embodiment 2 of the present invention;

[0037] Figure 7 It is a schematic structural diagram of the vertical door frame in Embodiment 2 of the present invention;

[0038] Figure 8 It is a schematic structural diagram of the two-way lock in Embodiment 1 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0040] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are only for illustrative purposes and do not represent the only implementation.

[0041] Unless otherwise defined, all technical and scientific terms used in this article have the same meaning as commonly understood by those skilled in the technical field to which this invention belongs. The terms used in the description of this invention are only for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" used in this article includes any and all combinations of one or more of the related listed items.

[0042] Embodiment 1

[0043] As Figures 1 - 8 shown, a double-opening mother-and-child door includes a door frame 10, a door leaf 20 and a limit assembly 30, wherein,

[0044] The door frame 10 includes two vertical door frames 11 and an upper horizontal door frame 12 provided at the ends of the two vertical door frames 11;

[0045] The door leaf 20 includes a mother door panel 21 and a child door panel 22. One side of the mother door panel 21 and the child door panel 22 are respectively hinged to the two vertical door frames 11. A two-way lock 40 is provided on the mating surface 25 where the mother door panel 21 and the child door panel 22 cooperate with each other. A first door lock 23 is provided on the mother door panel 21, and a second door lock 24 is provided on the child door panel 22; the first door lock 23 and the second door lock 24 independently control the two-way lock 40;

[0046] The limit assembly 30 is arranged along the direction of the mating surface 25 towards the two vertical door frames 11, and includes a mother door limit assembly 31 and a child door limit assembly 32 respectively arranged on the opposite sides of the opening directions of the mother door panel 21 and the child door panel 22. The mother door limit assembly 31 and the child door limit assembly 32 are located on both sides of the door frame 10.

[0047] By arranging the limit component 30 along the mating surface 25 towards the two vertical door frames 11, the opening directions of the mother door panel 21 and the child door panel 22 are opposite. At the same time, by arranging a two-way lock 40 on the mating surface 25 where the mother door panel 21 and the child door panel 22 cooperate with each other, the first door lock 23 on the mother door panel 21 and the second door lock 24 on the child door panel 22 independently control the two-way lock 40; realizing the functions that the mother door panel 21 and the child door panel 22 have different opening directions and can be opened simultaneously, and the automatic seal 51 of the upper horizontal door frame 12 can be controlled independently, and the opening of the door leaf 20 is not restricted. Compared with the prior art, the present invention avoids the limitation that the child door cannot be independently opened in the actual use of the double-opening mother-child door, and improves the application effect of the double-opening mother-child door.

[0048] The double-opening mother-child door inside and outside provided by the present invention can be assembled and installed on site. The vertical door frames 11 are universal on the left and right. Only the upper horizontal door frame 12 needs to use a retaining strip to distinguish the opening directions of the mother-child door during installation, and the position of the retaining strip of the door frame 10 can be adjusted according to the actual installation. Compared with the prior art, the installation efficiency, error tolerance rate, etc. are greatly increased, and the labor cost is greatly reduced.

[0049] The double-opening mother-child door inside and outside provided by the present invention is convenient for the elderly and for use in specific places. When a special situation occurs indoors and the indoor scene cannot be determined, the rescue personnel can also open the door opening towards the outside for timely rescue, meeting the fire protection requirements.

[0050] As Figure 8 shown, the two-way lock 40 includes a first lock core 41 and a second lock core 42 that are centrally symmetric and connected. The first lock core 41 and the second lock core 42 both include a connecting bridge 43 and lock tongues 44 arranged at both ends of the connecting bridge 43. The first lock core 41 and the second lock core 42 rotate in the same direction. The lock tongue 44 at the tail end of the first lock core 41 is connected to the lock tongue 44 at the head end of the second lock core 42 to form a first connection surface 45. The lock tongue 44 at the head end of the first lock core 41 is connected to the lock tongue 44 at the tail end of the second lock core 42 to form a second connection surface 46. When the first connection surface 45 and the second connection surface 46 are coplanar with the mating surface 25, the two-way lock 40 is opened; when the first connection surface 45 and the second connection surface 46 are misaligned with the mating surface 25, the two-way lock 40 is closed. Taking Figure 8 as an example, at this time, the first connection surface 45 and the second connection surface 46 are misaligned with the mating surface 25, and the two-way lock 40 is closed. When the lock tongue 44 rotates counterclockwise until the first connection surface 45 and the second connection surface 46 are coplanar with the mating surface 25, the two-way lock 40 is opened. It should be noted here that the attachment Figure 8 in the present invention is only used to represent the structural features of the two-way lock 40, and does not limit it to be circular. Those skilled in the art can set it according to the actual situation.

[0051] As Figure 2As shown in the figure, the mother door limit assembly 31 is arranged along the mating surface 25 in the direction towards the vertical door frame 11 hinged to the mother door panel 21, and includes a first anti-collision rubber strip 311 and a first limit bar 312; the first anti-collision rubber strip 311 is located between the door frame 10 and the first limit bar 312. When the mother door panel 21 contacts the first anti-collision rubber strip 311, the first anti-collision rubber strip 311 deforms and has a certain elastic force on the mother door panel 21; specifically, the hardness of the limit bar is not less than that of the door leaf 20 or the door frame 10, and it can be made of wood or metal products to limit the door leaf 20 after it is opened. The anti-collision rubber strip is used to protect the door leaf 20, prevent it from colliding with the limit bar, and extend its service life. At the same time, it has functions such as fire prevention, sound insulation, light blocking, mosquito and insect prevention, etc.

[0052] The sub-door limit assembly 32 is arranged along the mating surface 25 in the direction towards the vertical door frame 11 hinged to the sub-door panel 22, and includes a second anti-collision rubber strip 321 and a second limit bar 322; the second anti-collision rubber strip 321 is located between the door frame 10 and the second limit bar 322. When the sub-door panel 22 contacts the second anti-collision rubber strip 321, the second anti-collision rubber strip 321 deforms and has a certain elastic force on the sub-door panel 22.

[0053] Specifically, it further includes a fixing component, which is arranged at the junction of the upper horizontal door frame 12 and the mating surface 25, and is used to fix the double-opening inside-outside mother and sub-doors when the mother door panel 21 and / or the sub-door panel 22 are closed. Prevent the other door from opening when the mother door panel 21 or the sub-door panel 22 is opened alone, and realize the independent operation of the opening of the mother door panel 21 or the sub-door panel 22.

[0054] Preferably, the fixing component includes a first magnet respectively arranged at the top ends of the mother door panel 21 and the sub-door panel 22 and a second magnet arranged at the corresponding positions on the upper horizontal door frame 12. The attraction force between the first magnet and the second magnet is less than the pulling force when the mother door panel 21 and the sub-door panel 22 are opened. Those skilled in the art can set it according to the actual situation, as long as the independent operation can be realized, such as a pin shaft, an elastic member, etc.

[0055] A door bottom automatic seal 60 is also arranged at the bottom of the mother door panel 21 and the sub-door panel 22, and the door bottom automatic seal 60 automatically rebounds and resets when the door leaf 20 is opened. When the door leaf 20 is closed, pressure is applied to the door bottom automatic seal 60, and the sealing strip of the door bottom automatic seal 60 automatically pops out, so that its bottom reaches a seamless state.

[0056] Therefore, the installation method of the double-opening inside-outside mother and sub-doors in this embodiment includes the following operation steps:

[0057] S01: Install the door frame 10, and install the upper horizontal door frame 12 at the ends of the two vertical door frames 11;

[0058] S02: Install the mother - door limit component 31 and the child - door limit component 32 at the opposite side of the opening direction of the mother - door panel 21 and the child - door panel 22 and at the relative positions of the vertical doorframe 11 according to the installation requirements.

[0059] S03: Set the door - bottom automatic seal 60 at one end of the mother - door panel 21 and the child - door panel 22 facing the ground, and install the mother - door panel 21 and the child - door panel 22 on the vertical doorframe 11 by using hinges; and set a first magnet at the top of the mother - door panel 21 and the child - door panel 22, and set a second magnet at the relative position of the upper horizontal doorframe 12.

[0060] S04: Set a two - way lock 40 on the mating surface 25 where the mother - door panel 21 and the child - door panel 22 cooperate with each other.

[0061] Embodiment 2

[0062] In this embodiment, a bilateral double - control automatic seal component 50 is used as the fixing component, and the rest of the structure is the same as that of Embodiment 1 and will not be described here again.

[0063] As Figure 3 shown, it further includes a bilateral double - control automatic seal component 50. The bilateral double - control automatic seal component 50 includes an automatic seal 51 and doorframe 10 connecting members arranged at both ends of the automatic seal 51. The automatic seal 51 is arranged on the side of the upper horizontal doorframe 12 facing the door leaf 20, and the doorframe 10 connecting members are arranged at the connection between the vertical doorframe 11 and the upper horizontal doorframe 12.

[0064] As Figures 4 - 5 shown, the automatic seal 51 includes a first seal 511, a second seal 512 and a fixed connecting piece 513. The fixed connecting piece 513 is arranged at the junction of the upper horizontal doorframe 12 and the mating surface 25, and the first seal 511 and the second seal 512 are respectively arranged at both ends of the fixed connecting piece 513; the two doorframe 10 connecting members are respectively connected to the free ends of the first seal 511 and the second seal 512.

[0065] As Figures 6 - 7 shown, a first groove 13 is arranged at one end of the vertical doorframe 11 close to the upper horizontal doorframe 12, and a second groove 14 is arranged on the side surface of the upper horizontal doorframe 12 facing the vertical doorframe 11; the doorframe 10 connecting members are arranged in the first groove 13, and the automatic seal 51 is arranged in the second groove 14.

[0066] In this embodiment, each door frame 10 connecting member includes a housing and a telescopic assembly disposed inside the housing. A first mounting hole and a second mounting hole are formed on one side of the housing facing the automatic seal 51, and the telescopic assembly passes through the second mounting hole and is disposed toward the outside of the housing; the free ends of the first seal 511 and the second seal 512 respectively extend into the first mounting hole and abut against the telescopic assembly. Those skilled in the art can make actual settings as long as the automatic seal 51 can pop out when the door is closed and rebound when the door is opened.

[0067] Specifically, a bottom door automatic seal 60 is further provided at the bottoms of the mother door panel 21 and the child door panel 22, and the bottom door automatic seal 60 automatically rebounds and resets when the door leaf 20 is opened. The built-in spring of the door frame 10 connecting member rebounds, relaxing the pressure on the double-sided double-control automatic seal 51, so that the automatic seal 51 on the upper horizontal door frame 12 rebounds and resets, and the door leaf 20 is normally opened.

[0068] When the door leaf 20 is closed, pressure is applied to the bottom door automatic seal 60 and the door frame 10 connecting member, and then the door frame 10 connecting member transfers the pressure to the double-sided double-control automatic seal 51, and the sealing strips of the two seals automatically pop out. The operation of each component is driven by the door leaf 20, so that a seamless state is achieved when it is closed.

[0069] Therefore, the installation method of the double-opening inside-outside mother-child door in this embodiment includes the following operation steps:

[0070] S01: When the door frame 10 is produced, corresponding first grooves 13 and second grooves 14 are set according to the sizes of various components;

[0071] S02: Fit the double-sided double-control automatic seal 51 with the door frame 10 connecting member, install it in the first groove 13 and fix it;

[0072] S03: Install the door frame 10, splice the assembled upper horizontal door frame 12 with the left and right vertical door frames 11; embed the double-sided double-control automatic seal assembly into the second groove 14,

[0073] S04: Set the mother door limit assembly 31 and the child door limit assembly 32 at the opposite sides of the mother door panel 21 and the child door panel 22 in the opening direction and the relative positions of the vertical door frame 11 according to the installation requirements;

[0074] S05: Set the bottom door automatic seal 60 at one end of the mother door panel 21 and the child door panel 22 facing the ground, and install the mother door panel 21 and the child door panel 22 on the vertical door frame 11 by using hinges;

[0075] S06: Set a two-way lock 40 on the mating surface 25 where the mother door panel 21 and the child door panel 22 cooperate with each other.

[0076] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A double-opening mother-and-child door with internal and external opening, characterized in that, It includes a door frame, a door leaf and a limit component. Among them, the door frame includes two vertical door frames and an upper horizontal door frame arranged at the ends of the two vertical door frames; the door leaf includes a mother door panel and a child door panel. One side of the mother door panel and the child door panel is respectively hinged to the two vertical door frames. A two-way lock is arranged on the mating surface where the mother door panel and the child door panel cooperate with each other. A first door lock is arranged on the mother door panel, and a second door lock is arranged on the child door panel; the first door lock and the second door lock independently control the two-way lock; the limit component is arranged along the direction of the mating surface towards the two vertical door frames, and includes a mother door limit component and a child door limit component respectively arranged on the opposite sides of the mother door panel and the child door panel in the opening direction. The mother door limit component and the child door limit component are located on both sides of the door frame; the two-way lock includes a first lock core and a second lock core that are centrally symmetric and connected. Both the first lock core and the second lock core include a connecting bridge and lock tongues arranged at both ends of the connecting bridge. The first lock core and the second lock core rotate in the same direction. The lock tongue at the tail end of the first lock core is connected to the lock tongue at the head end of the second lock core to form a first connection surface. The lock tongue at the head end of the first lock core is connected to the lock tongue at the tail end of the second lock core to form a second connection surface. When the first connection surface and the second connection surface are coplanar with the mating surface, the two-way lock is opened; when the first connection surface and the second connection surface are misaligned with the mating surface, the two-way lock is closed; the mother door limit component is arranged along the direction of the mating surface towards the vertical door frame hinged to the mother door panel, and includes a first anti-collision rubber strip and a first limit bar; the first anti-collision rubber strip is located between the door frame and the first limit bar. When the mother door panel contacts the first anti-collision rubber strip, the first anti-collision rubber strip deforms and has a certain elastic force on the mother door panel; the child door limit component is arranged along the direction of the mating surface towards the vertical door frame hinged to the child door panel, and includes a second anti-collision rubber strip and a second limit bar; the second anti-collision rubber strip is located between the door frame and the second limit bar. When the child door panel contacts the second anti-collision rubber strip, the second anti-collision rubber strip deforms and has a certain elastic force on the child door panel.

2. The inside-outside double-opening mother-and-child door according to claim 1, characterized in that, It further includes a fixing component. The fixing component is arranged at the junction of the upper horizontal door frame and the mating surface and is used to fix the inside and outside double-opening mother and child door when the mother door panel and / or the child door panel are closed.

3. The inside and outside double-opening mother and son door according to claim 2, characterized in that, The fixing component includes a first magnet respectively arranged at the top ends of the mother door panel and the child door panel and a second magnet arranged at the corresponding position on the upper horizontal door frame. The attraction between the first magnet and the second magnet is less than the pulling force when the mother door panel and the child door panel are opened.

4. The inside and outside double-opening mother and son door according to claim 1, characterized in that, It further includes a bilateral double-control automatic sealing assembly, which includes an automatic seal and doorframe connection members arranged at both ends of the automatic seal. The automatic seal is arranged on the side of the upper horizontal doorframe facing the door leaf, and the doorframe connection members are arranged at the joint of the vertical doorframe and the upper horizontal doorframe.

5. The inside and outside double-opening mother and son door according to claim 4, characterized in that, The automatic seal includes a first seal, a second seal and a fixed connecting member. The fixed connecting member is arranged at the junction of the upper horizontal doorframe and the mating surface. The first seal and the second seal are respectively arranged at both ends of the fixed connecting member; the two doorframe connection members respectively connect the free ends of the first seal and the second seal.

6. The inside-outside double-opening mother-and-child door according to claim 4, wherein A first groove is arranged at one end of the vertical doorframe close to the upper horizontal doorframe, and a second groove is arranged on the side surface of the upper horizontal doorframe facing the vertical doorframe; the doorframe connection member is arranged in the first groove, and the automatic seal is arranged in the second groove.

7. The inside and outside double-opening mother and son door according to claim 1, characterized in that, A bottom door automatic seal is further arranged at the bottoms of the mother door panel and the child door panel, and the bottom door automatic seal automatically rebounds and resets when the door leaf is opened.

8. The installation method of the inside-outside double-opening mother-child door according to claim 1, characterized in that It includes the following operation steps: S01: Install the doorframe and splice the upper horizontal doorframe with the left and right vertical doorframes; S02: Set the mother door limit assembly and the child door limit assembly on the opposite sides of the mother door panel and the child door panel in the opening direction according to the installation requirements; S03: Install the mother door panel and the child door panel on the vertical doorframe by using hinges; S04: Set a two-way lock on the mating surfaces of the mother door panel and the child door panel that cooperate with each other.

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