Door locking structure and aircraft

Abstract

The present invention discloses a cabin door locking structure and an aircraft, and relates to the technical field of aircraft structural parts, wherein the cabin door locking structure includes an external locking mechanism, an internal locking mechanism and a locking pin mechanism, wherein the external locking mechanism includes an external handle and an external transmission assembly, wherein the external handle is rotatably arranged on the outside of the cabin door, and the external transmission assembly is arranged in the inner cavity of the cabin door; the internal locking mechanism includes an internal handle and an internal transmission assembly, wherein the internal handle is rotatably arranged on the inside of the cabin door, and the internal handle can slide along the cabin door, the internal transmission assembly is arranged in the inner cavity, and the internal transmission assembly is arranged in a linkage with the external transmission assembly; the locking pin mechanism includes a plurality of locking pins, each of which is connected to the external transmission assembly. The internal handle of the present invention is arranged in a linkage with the external transmission assembly through the internal transmission assembly, so that the internal transmission assembly does not need to be connected to the locking pin, but only needs to be linked with the adjacent external transmission assembly, thereby reducing the volume and weight of the internal transmission assembly, and further reducing the volume and weight of the cabin door lock as a whole.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft structural parts, and in particular to a cabin door locking structure and an aircraft. Background Art

[0002] With the development of eVTOL (Electric Vertical Takeoff and Landing), the potential future applications of eVTOL involve multiple scenarios such as urban passenger transport, regional passenger transport, cargo transport, personal aircraft, and emergency medical services. eVTOL is battery-powered, and its endurance depends on the total battery power and the total weight of the aircraft. Therefore, reducing the weight of the entire aircraft is crucial to improving flight performance. In the prior art, the door lock of an aircraft is usually formed by a multi-link structure, and the transmission between the links is used to achieve simultaneous unlocking of multiple lock pins when the handle is pulled. The inner and outer handles of the door are both provided with a set of link structures, which makes the overall weight of the link structure too large, and the structural principle is complex, and it occupies a large space. For eVTOL, which has limited weight and space layout, the door lock of the link structure will cause the weight and overall volume of the eVTOL to exceed the budget, and the lightweight design of the eVTOL cannot be achieved. Summary of the invention

[0003] The main purpose of the present invention is to provide a door locking structure and an aircraft, aiming to solve the problem of excessive weight and volume of the door lock of the connecting rod structure in the prior art.

[0004] To achieve the above object, the present invention provides a door locking structure, wherein the door has a hinged side and a locking side, the hinged side is hinged to the body of the aircraft so that the door can rotate relative to the body to open or close the door opening of the body, and the door locking structure includes:

[0005] An external locking mechanism, the external locking mechanism comprising an external handle and an external transmission assembly, the external handle being rotatably disposed on the outside of the cabin door, and the external transmission assembly being disposed in the inner cavity of the cabin door;

[0006] An inner locking mechanism, the inner locking mechanism comprising an inner handle and an inner transmission assembly, the inner handle being rotatably disposed on the inner side of the door and being slidable along the door, the inner transmission assembly being disposed in the inner cavity and being linked with the outer transmission assembly;

[0007] A locking pin mechanism, the locking pin mechanism comprising a plurality of locking pins, each of the locking pins being connected to the outer transmission assembly and being used to lock with the body when the cabin door closes the cabin door;

[0008] The outer transmission assembly is used to pull all the locking pins to unlock from the machine body when the outer handle rotates, and the inner transmission assembly is used to pull all the locking pins to unlock from the machine body through the outer transmission assembly when the inner handle rotates and slides.

[0009] In one embodiment, a door latch for locking with the corresponding locking pin is provided at a position of the hatch door wall corresponding to each of the locking pins;

[0010] The outer transmission assembly includes a plurality of outer flexible cables, the number of which is consistent with the number of the lock pins and corresponds one to one, one end of each of the outer flexible cables is connected to the outer handle, the other end of each of the outer flexible cables is connected to the corresponding lock pin, and each of the outer flexible cables is used to pull the lock pin to unlock from the corresponding door bolt when the outer handle is rotated;

[0011] The internal transmission assembly includes a plurality of internal flexible cables, the number of the internal flexible cables is consistent with the number of the external flexible cables and corresponds one to one, one end of each of the internal flexible cables is linked to the corresponding external flexible cable, the other end of each of the internal flexible cables is connected to the internal handle, and a part of the internal flexible cables is used to pull the corresponding locking pin from the corresponding door bolt to unlock the door when the internal handle is rotated through the corresponding external flexible cable, and the other part of the internal flexible cables is used to pull the corresponding locking pin from the corresponding door bolt to unlock the door when the internal handle is rotated and slid through the corresponding external flexible cable.

[0012] In one embodiment, one end of some of the inner flexible cables is linked to the corresponding outer flexible cables through a first transmission assembly, and when the inner handle is rotated, the corresponding outer flexible cables are driven along the moving direction of the inner flexible cables through the first transmission assembly to pull the lock pin to unlock from the corresponding door bolt;

[0013] One end of the remaining inner flexible cable is linked to the corresponding outer flexible cable through a second transmission component, and when the inner handle rotates, or when the inner handle rotates and slides, the corresponding outer flexible cable is driven by the second transmission component in a direction opposite to the moving direction of the inner flexible cable to pull the locking pin to unlock the corresponding door bolt.

[0014] In one embodiment, the outer handle has a first rotating shaft, and opposite ends of the outer handle form a first end and a second end that can rotate around the first rotating shaft, and some of the outer flexible cables are first outer flexible cables connected to the first end, and the rest of the outer flexible cables are second outer flexible cables connected to the second end;

[0015] The inner handle has a second rotating shaft, and one end of the inner handle away from the second rotating shaft forms a third end that can rotate around the second rotating shaft, and multiple inner flexible cables are connected to the third end, and the inner flexible cable linked to the first outer flexible cable through the first transmission component is a first inner flexible cable, and the inner flexible cable linked to the second outer flexible cable through the second transmission component is a second inner flexible cable.

[0016] In one embodiment, the first transmission assembly includes a fixed shaft, a first shift fork and a first fixing member, the fixed shaft and the first fixing member are both mounted on the hatch, the first fixing member is used for allowing the first inner flexible cable to pass through and providing support for the first inner flexible cable, the first shift fork is sleeved outside the fixed shaft and is in sliding contact with the fixed shaft, the first shift fork is connected to the corresponding first inner flexible cable, the first shift fork is also connected to the corresponding first outer flexible cable, a first buckle is provided on the first outer flexible cable, and the first buckle is located on the side of the first shift fork facing the outer handle;

[0017] When the inner handle is rotated, the first inner flexible cable drives the first fork to move along the fixed axis toward the third end, so that the first buckle abuts against the first fork and pushes the first outer flexible cable to drive the locking pin connected to the first outer flexible cable to move in a direction away from the corresponding door latch, so as to unlock the locking pin from the corresponding door latch.

[0018] In one embodiment, the second transmission assembly includes a rotating shaft, a second fork and a second fixing member, the rotating shaft and the second fixing member are both mounted on the hatch, the second fixing member is used for the second inner flexible cable to pass through and provide support for the second inner flexible cable, the second fork is rotatably connected to the rotating shaft, the opposite ends of the second fork are respectively a first connecting end and a second connecting end, the first connecting end is connected to the corresponding second inner flexible cable, the second connecting end is connected to the corresponding second outer flexible cable, a second buckle is provided on the second inner flexible cable, a third buckle is provided on the second outer flexible cable, and the second buckle and the third buckle are both located on the side of the second fork facing the outer handle;

[0019] When the inner handle rotates, or when the inner handle rotates and slides, the second inner flexible cable pushes the first connection end to swing around the rotation axis toward the third end through the abutment between the second buckle and the first connection end, and pushes the second connection end to swing away from the third end through the abutment between the third buckle and the second connection end, so as to pull the second outer flexible cable to drive the locking pin connected to the second outer flexible cable to move in the direction away from the corresponding door latch, so as to unlock the locking pin from the corresponding door latch.

[0020] In one embodiment, each locking side is correspondingly provided with a locking pin, the number of the first outer flexible cable is one, the number of the second outer flexible cable is two, and the length of one of the second outer flexible cables is greater than the length of the other second outer flexible cable;

[0021] The inner handle is used to pull the second connecting end corresponding to the second outer flexible cable of shorter length to swing in a direction away from the third end when rotating, so as to pull the second outer flexible cable to move in a direction away from the door latch through the second connecting end;

[0022] The inner handle is used to pull the second connecting end corresponding to the second outer flexible cable with a longer length to swing in a direction away from the third end when it rotates and slides in the moving direction of the third end, so as to pull the second outer flexible cable through the second connecting end to move in a direction away from the door latch.

[0023] In one embodiment, the lock pin includes a lock box, a lock rod and an elastic member, an installation cavity is formed in the lock box, the lock rod is located in the installation cavity, the two ends of the lock rod are respectively a pulling end and a locking end, the pulling end of the lock rod passes through the box wall of the lock box and is connected to the corresponding external flexible cable, the elastic member is located in the installation cavity, and the two ends of the elastic member are respectively abutted against the box wall and the locking end, the locking end is used to move toward the mouth wall of the hatch door under the elastic action of the elastic member to lock with the machine body, or move in a direction away from the mouth wall of the hatch door under the pulling of the external transmission assembly to unlock with the machine body.

[0024] In one embodiment, a door bolt for locking with the corresponding lock pin is arranged at a position of the door wall of the hatch door corresponding to each of the lock pins, a guide plate is arranged in the installation cavity, the lock rod is slidably inserted into the guide plate, the elastic member is a spring sleeved outside the lock rod, a locking block is arranged at the locking end, the two ends of the spring are respectively in contact with the guide plate and the locking block, the door bolt has a lock ring, a lock groove is formed in the lock ring, a side of the lock box forms an escape opening for the lock ring to enter the installation cavity, and the locking block forms an arc-shaped guide slope on the side facing the escape opening;

[0025] The locking block is used to move toward the corresponding locking ring under the elastic action of the elastic member and be inserted into the locking groove to lock with the door latch, or to move in a direction away from the locking ring and disengage from the locking groove to unlock with the door latch under the pulling of the external transmission component.

[0026] In one embodiment, a Hall sensor is further provided on the door latch, and a magnet for cooperating with the Hall sensor is provided on the locking block.

[0027] In one embodiment, the hatch is provided with a socket, and a lock hole connected to the socket is provided at a position of the inner handle corresponding to the socket, and the hatch locking structure further includes a safety latch, which can pass through the lock hole and extend into the socket to abut against the socket to lock the inner handle with the hatch, and the safety latch can also be pulled out from the lock hole and the socket to unlock the inner handle with the hatch; and / or,

[0028] The hatch has three locking sides, and each of the locking sides is correspondingly provided with at least one locking pin.

[0029] The present invention also provides a cabin door, which has a hinged side and a locking side, the hinged side is hinged to the body of the aircraft so that the cabin door can rotate relative to the body to open or close the cabin door of the body, and the cabin door is provided with the above-mentioned cabin door locking structure.

[0030] The present invention further provides an aircraft, comprising a fuselage and the above-mentioned cabin door, wherein the cabin door is provided on one side of the fuselage.

[0031] The technical solution of the present invention is to set an external locking mechanism and an internal locking mechanism on the cabin door of the aircraft, the external handle is connected to a plurality of lock pins respectively through an external transmission assembly, and the internal handle is linked with the external transmission assembly through the internal transmission assembly, so that the internal transmission assembly does not need to be connected to the lock pin, but only needs to be linked with the adjacent external transmission assembly, and the lock pin can be pulled by the external transmission assembly to achieve unlocking, thereby reducing the length, volume and weight of the internal transmission assembly, and further reducing the volume and weight of the cabin door locking structure as a whole. At the same time, the internal handle needs to be rotated and slid at the same time to achieve unlocking of all the lock pins, so as to avoid the cabin door opening when the internal handle is accidentally touched and rotated, thereby improving the overall safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the assembly structure of the door and the fuselage provided by the present invention;

[0034] Figure 2 A structural schematic diagram of a hatch door locking structure provided by the present invention at a viewing angle;

[0035] Figure 3 A schematic diagram of the structure of the hatch door locking structure provided by the present invention at another viewing angle;

[0036] Figure 4 A schematic diagram of the connection relationship of the first transmission assembly of the hatch door locking structure provided by the present invention;

[0037] Figure 5 A schematic diagram of the connection relationship of the second transmission assembly of the hatch door locking structure provided by the present invention;

[0038] Figure 6 A structural schematic diagram of a lock box of a hatch door locking structure provided by the present invention;

[0039] Figure 7 A schematic structural diagram of the inner handle of the hatch door locking structure provided by the present invention.

[0040] Description of Figure Numbers:

[0041] 100. Door locking structure; 1. External locking mechanism; 11. External handle; 111. First rotating shaft; 112. First end; 113. Second end; 114. External grip; 115. External connecting rod; 116. External rotating arm; 12. External transmission assembly; 13. External flexible cable; 13a. First external flexible cable; 13b. Second external flexible cable; 14a. First buckle; 14b. Third buckle; 2. Internal locking mechanism; 21. Internal handle; 211. Second rotating shaft; 212. Third end; 213. Lock hole; 214. Safety latch; 215. Internal grip; 216. Internal connecting rod; 217. Internal rotating arm; 22. Internal transmission assembly; 23. Internal flexible cable; 23a. First internal flexible cable; 23b, second inner flexible cable; 24, first transmission assembly; 241, fixed shaft; 242, first fork; 243, first fixing member; 25, second transmission assembly; 251, rotating shaft; 252, second fork; 253, second fixing member; 26, second buckle; 3, locking pin mechanism; 31, locking pin; 32, lock box; 33, locking rod; 331, locking block; 332, guide slope; 34, elastic member; 35, guide plate; 36, avoidance; 37, magnet; 200, fuselage; 201, cabin door; 202, hinged side; 203, locking side; 204, cabin door; 205, latch; 206, locking ring; 207, lock slot; 208, jack; 209, Hall sensor.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] In the prior art, the cabin door lock of an aircraft is usually formed by a multi-link structure, and the transmission between the links is used to realize the simultaneous unlocking of multiple lock pins when the handle is pulled, and the inner and outer handles in the cabin are both provided with a set of connecting rod structures, which makes the connecting rod structure too heavy, and the structural principle is complex, and occupies a large space. For the eVTOL, which has limited weight and space layout, the cabin door lock with a connecting rod structure will cause the weight and overall volume of the eVTOL to exceed the budget, and the lightweight of the eVTOL cannot be achieved.

[0047] Please combine Figures 1 to 3 In order to solve the above problems, the present invention proposes a door locking structure 100, wherein the door 201 has a hinged side 202 and a locking side 203, the hinged side 202 is hinged to the body 200 of the aircraft, so that the door 201 can rotate relative to the body 200 to open or close the door 204 of the body 200, the door locking structure 100 includes an outer locking mechanism 1, an inner locking mechanism 2 and a locking pin mechanism 3, the outer locking mechanism 1 includes an outer handle 11 and an outer transmission assembly 12, the outer handle 11 is rotatably arranged on the outer side of the door 201, and the outer transmission assembly 12 is arranged in the inner cavity of the door 201; the inner locking mechanism 2 includes an inner handle 21 and an inner transmission assembly 22, the inner handle 21 is rotatably arranged on the inner side of the cabin door 201, and the inner handle 21 can slide along the cabin door 201, the inner transmission assembly 22 is arranged in the inner cavity, and the inner transmission assembly 22 is linked with the outer transmission assembly 12; the locking pin mechanism 3 includes a plurality of locking pins 31, each locking pin 31 is connected to the outer transmission assembly 12 and is used to lock with the body 200 when the cabin door 201 closes the cabin door 204; the outer transmission assembly 12 is used to pull all the locking pins 31 to unlock from the body 200 when the outer handle 11 rotates and slides, and the inner transmission assembly 22 is used to pull all the locking pins 31 to unlock from the body 200 through the outer transmission assembly 12 when the inner handle 21 rotates.

[0048] It should be noted that the cabin door 201 is usually arranged in a quadrilateral shape, and its hinged side 202 is usually located at the top or both sides in the horizontal direction. The other three sides except the side where the hinged side 202 is located form three locking sides 203. At least one locking pin 31 is arranged on each locking side 203. The locking pin 31 is used to lock with the fuselage 200 of the aircraft to lock the cabin door 201 on the fuselage 200. The locking pins 31 on the three locking sides 203 apply locking force from three directions, thereby improving the locking strength and stability of the cabin door 201. The number of locking pins 31 on each locking side 203 is selected according to the size of the cabin door 201 and the locking strength required for a specific application.

[0049] Furthermore, the technical solution of the present invention is to set an external locking mechanism 1 and an internal locking mechanism 2 on the cabin door 201 of the aircraft, and the external handle 11 is connected to multiple locking pins 31 respectively through the external transmission component 12, and the internal handle 21 is linked with the external transmission component 12 through the internal transmission component 22, so that the internal transmission component 22 does not need to be connected to the locking pin 31, but only needs to be linked with the adjacent external transmission component 12, and the locking pin 31 can be pulled by the external transmission component 12 to achieve unlocking, thereby reducing the volume and weight of the internal transmission component 22, and then reducing the overall volume and weight of the cabin door locking structure 100, which is conducive to the lightweight design of the eVTOL.

[0050] It can be understood that the door locking structure 100 is critical to the safety and reliability of the eVTOL during flight. During flight, once the door locking structure 100 fails, the door 201 is accidentally opened without command, and the airflow inside and outside the cabin is instantly turbulent, the aircraft will lose flight balance and cause a major accident. Therefore, by design, the inner handle 21 needs to be rotated and slid at the same time to unlock all the lock pins 31, so as to avoid the door 201 from opening when the inner handle 21 is accidentally touched and rotated, thereby improving the overall safety. In addition, the inner flexible cable 23 and the outer flexible cable 13 are unidirectionally linked, so that the inner flexible cable 23 can only pull the outer flexible cable 13 to pull all the lock pins 31 to unlock from the fuselage 200, and cannot limit the outer flexible cable 13 from moving under the drive of the outer handle 11, so that even when the cabin door 201 cannot be opened by the inner handle 21 inside the fuselage 200, the cabin door 201 can be unlocked and opened from the outside through the outer handle 11.

[0051] In one embodiment, a door latch 205 for locking with the corresponding door latch 31 is arranged at a position of the door wall of the hatch door 204 corresponding to each lock pin 31; the outer transmission assembly 12 includes a plurality of outer flexible cables 13, the number of the outer flexible cables 13 is consistent with the number of the lock pins 31 and corresponds one to one, one end of each outer flexible cable 13 is connected to the outer handle 11, and the other end of each outer flexible cable 13 is connected to the corresponding lock pin 31, and each outer flexible cable 13 is used to pull the lock pin 31 to unlock from the corresponding door latch 205 when the outer handle 11 is rotated; the inner transmission assembly 22 includes a plurality of inner flexible cables 23, The number of inner flexible cables 23 is consistent with the number of outer flexible cables 13 and corresponds one to one. One end of each inner flexible cable 23 is linked to the corresponding outer flexible cable 13, and the other end of each inner flexible cable 23 is connected to the inner handle 21. A part of the inner flexible cables 23 is used to pull the corresponding locking pin 31 from the corresponding door latch 205 through the corresponding outer flexible cable 13 when the inner handle 21 is rotated, and the other part of the inner flexible cables 23 is used to pull the corresponding locking pin 31 from the corresponding door latch 205 through the corresponding outer flexible cable 13 when the inner handle 21 is rotated and slides.

[0052] It should be noted that the EVTOL aircraft has a small overall volume, a large curvature of its cabin door, a small inner cavity space of the cabin door, and a large transparent area on the cabin door. The rigid connecting rod of the conventional connecting rod structure cannot adapt to its curvature, nor can it be arranged in the narrow cabin door space, and it cannot be set to avoid the transparent area. Therefore, the outer transmission component 12 and the inner transmission component 22 are both set as flexible cables, which further reduces the overall weight and volume of the transmission system. At the same time, the flexible cable has strong deformability and can adjust the routing method according to the cabin door 201 of any structure, without the need for connecting rods. The structure must also be arranged along a straight line, thereby greatly improving the convenience and flexibility of design. In the face of the large curvature, small inner cavity and large transparent area of ​​the EVTOL aircraft, the outer transmission component 12 and the inner transmission component 22 formed by the flexible cable can be flexibly routed. While meeting the overall transmission requirements of the door locking structure 100, it will not take up too much space and weight. It is also easier to adapt to areas with larger curvatures, and transparent areas can be avoided to ensure overall aesthetics. At the same time, it also reduces the difficulty of installing the door locking structure 100 on the door 201. After setting the routing of the outer flexible cable 13 and the inner flexible cable 23, when the outer handle 11 is rotated, the outer flexible cable 13 is driven by the outer handle 11 to move in the direction away from the door latch 205, thereby driving the locking pin 31 to move in the direction away from the door latch 205, thereby unlocking the cabin door 201 and the body 200. The number of the inner flexible cables 23 and the outer flexible cables 13 is the same and corresponds one to one. When the inner handle 21 is rotated, the inner flexible cable 23 pulls the outer flexible cable 13 to move in the direction away from the door latch 205, thereby driving the locking pin 31 to move in the direction away from the door latch 205, thereby unlocking the cabin door 201 and the body 200.

[0053] In one embodiment, one end of some of the inner flexible cables 23 is linked to the corresponding outer flexible cables 13 through the first transmission assembly 24, and when the inner handle 21 rotates, the corresponding outer flexible cables 13 are driven by the first transmission assembly 24 along the moving direction of the inner flexible cables 23 to pull the locking pin 31 to unlock the corresponding door latch 205; one end of the remaining inner flexible cables 23 is linked to the corresponding outer flexible cables 13 through the second transmission assembly 25, and when the inner handle 21 rotates, or when the inner handle 21 rotates and slides, the corresponding outer flexible cables 13 are driven by the second transmission assembly 25 in the direction opposite to the moving direction of the inner flexible cables 23 to pull the locking pin 31 to unlock the corresponding door latch 205.

[0054] It can be understood that the inner handle 21 and the outer handle 11 are usually arranged near the middle of the hatch 201, so there is a situation where the lock pin 31 is located on the opposite sides of the inner handle 21 and the outer handle 11. In this case, it is impossible to simultaneously pull the lock pins 31 located on the opposite sides away from the door latch 205 by rotating the outer handle 11 in a single direction. In other words, the outer flexible cables 13 connected to the lock pins 31 located on the opposite sides are respectively connected to the opposite ends of the outer handle 11, that is, the two outer flexible cables 13 are close to each other. The moving directions of the part near the outer handle 11 are opposite, so part of the inner flexible cable 23 is connected to the corresponding outer flexible cable 13 through the first transmission assembly 24 to pull the corresponding outer flexible cable 13 along the moving direction of the inner flexible cable 23, and the remaining inner flexible cables 23 are connected to the corresponding outer flexible cables 13 through the second transmission assembly 25 to pull the outer flexible cables 13 in the direction opposite to the moving direction of the inner flexible cables 23, so as to achieve pulling out the locking pins 31 on the two outer flexible cables 13 with opposite moving directions at the same time.

[0055] Please combine Figure 2 , Figure 3 and Figure 7 Further, the outer handle 11 has a first rotating shaft 111, and the opposite ends of the outer handle 11 form a first end 112 and a second end 113 that can rotate around the first rotating shaft 111. Some of the outer flexible cables 13 are first outer flexible cables 13a connected to the first end 112, and the remaining outer flexible cables 13 are second outer flexible cables 13b connected to the second end 113; the inner handle 21 has a second rotating shaft 211, and one end of the inner handle 21 away from the second rotating shaft 211 forms a third end 212 that can rotate around the second rotating shaft 211. Multiple inner flexible cables 23 are all connected to the third end 212, and the inner flexible cables 23 linked to the first outer flexible cables 13a through the first transmission assembly 24 are first inner flexible cables 23a, and the inner flexible cables 23 linked to the second outer flexible cables 13b through the second transmission assembly 25 are second inner flexible cables 23b.

[0056] The reasons for connecting the first outer flexible cable 13a to the first end 112 and the second outer flexible cable 13b to the second end 113 are as mentioned above. The second rotating shaft 211 of the inner handle 21 is set at one end of the inner handle 21, and all the inner flexible cables 23 are connected to the third end 212. On the one hand, the volume of the inner handle 21 can be reduced, thereby reducing the weight. On the other hand, the inner flexible cables 23 all located at one end have neater and simpler routing without winding, thereby improving convenience.

[0057] Please combine Figures 2 to 4 In one embodiment, each first transmission assembly 24 includes a fixed shaft 241, a first fork 242 and a first fixing member 243. The fixed shaft 241 and the first fixing member 243 are both installed on the cabin door 201. The first fixing member 243 is used for allowing the first inner flexible cable 23a to pass through and provide support for the first inner flexible cable 23a. The first fork 242 is sleeved outside the fixed shaft 241 and is in sliding contact with the fixed shaft 241. The first fork 242 is connected to the corresponding first inner flexible cable 23a. The first fork 242 is also connected to the corresponding first outer flexible cable 13a. The first outer flexible cable 13a is provided with a first buckle 14a, and the first buckle 14a is located on the side of the first fork 242 facing the outer handle 11; when the inner handle 21 rotates, the first inner flexible cable 23a drives the first fork 242 to move along the fixed axis 241 toward the third end 212, so that the first buckle 14a abuts against the first fork 242 and pushes the first outer flexible cable 13a to drive the locking pin 31 connected to the first outer flexible cable 13a to move in a direction away from the corresponding door latch 205, so as to unlock the locking pin 31 from the corresponding door latch 205.

[0058] The first fork 242 of the first transmission assembly 24 can only slide along the extension direction of the fixed shaft 241, so that the movement of the inner flexible cable 23 and the outer flexible cable 13 is more stable and accurate. It can be understood that the first fixing member 243 is usually located at the end of the first inner flexible cable 23a, so as to provide support for the first inner flexible cable 23a. Since the first buckle 14a is located on the side of the first fork 242 facing the outer handle 11, when the inner handle 21 is rotated, the first inner flexible cable 23a is pulled along the rotation direction of the third end 212. At this time, the movement of the first inner flexible cable 23a drives the first fork 242 to move toward the direction of the third end 212. During the movement, the first fork 242 is pressed against the first buckle 14a located on the first outer flexible cable 13a, and the first outer flexible cable 13a is pushed to move in the direction of the third end 212 by pushing the first buckle 14a, and the lock pin 31 is pulled out of the bolt 205 and unlocked. It can be understood that, in combination with the attached Figure 2 and Figure 3It can be seen that the first fork 242 is located on the left side of the outer handle 11 and the inner handle 21. When the outer handle 11 rotates, the first outer flexible cable 13a moves directly toward the outer handle 11, and because the first buckle 14a is located on the side of the first fork 242 facing the outer handle 11, the first buckle 14a does not contact the first fork 242. That is to say, only when the inner handle 21 rotates, under the pulling of the first inner flexible cable 23a, the first fork 242 will abut against the first buckle 14a and push the first outer flexible cable 13a to move, and when the outer handle 11 rotates, the first fork 242 will not contact the first buckle 14a, and will not be able to affect the movement of the first outer flexible cable 13a. That is, the first fork 242 can only be linked with the first outer flexible cable 13a in one direction, and can only push the first outer flexible cable 13a toward the direction of the third end 212.

[0059] Please combine Figure 2 , Figure 3 and Figure 5 In one embodiment, each second transmission assembly 25 includes a rotating shaft 251, a second fork 252 and a second fixing member 253. The rotating shaft 251 and the second fixing member 253 are both installed on the cabin door 201. The second fixing member 253 is used for allowing the second inner flexible cable 23b to pass through and provide support for the second inner flexible cable 23b. The second fork 252 is rotatably connected to the rotating shaft 251. The opposite ends of the second fork 252 are respectively a first connecting end and a second connecting end. The first connecting end is connected to the corresponding second inner flexible cable 23b, and the second connecting end is connected to the corresponding second outer flexible cable 13b. The second inner flexible cable 23b is provided with a second buckle 26, and the second outer flexible cable 13b is provided with a third The buckle 14b, the second buckle 26 and the third buckle 14b are all located on the side of the second fork 252 facing the outer handle 11; when the inner handle 21 rotates, or when the inner handle 21 rotates and slides, the second inner flexible cable 23b pushes the first connection end to swing around the rotation axis 251 in the direction of the third end 212 through the abutment between the second buckle 26 and the first connection end, and pushes the second connection end to swing in the direction away from the third end 212 through the abutment between the third buckle 14b and the second connection end, so as to pull the second outer flexible cable 13b through the second connection end to drive the lock pin 31 connected to the second outer flexible cable 13b to move in the direction away from the corresponding door latch 205, so as to unlock the lock pin 31 from the corresponding door latch 205.

[0060] The second fork 252 of the second transmission assembly 25 can rotate around the rotating shaft 251. It can be understood that the rotation directions of the first connection end and the second connection end located on both sides of the rotating shaft 251 are opposite. When the inner handle 21 rotates or rotates and slides, the second inner flexible cable 23b moves toward the third end 212, and the second buckle 26 on the second inner flexible cable 23b abuts against the first connection end of the second fork 252, thereby pushing the first connection end to rotate in the direction of the third end 212. Since the rotation direction of the second connection end is opposite to that of the first connection end, the second connection end swings in the direction away from the third end, that is, toward the direction of the outer handle 11. Therefore, the second connection end abuts against the third buckle 14b and pushes the third buckle 14b to move in the direction of the outer handle 11, thereby driving the second outer flexible cable 13b to move in the direction of the outer handle 11, and pulling the lock pin 31 on the second outer flexible cable 13b out of the corresponding door latch 205 to achieve unlocking.

[0061] Understandably, combined with the Figure 2 and Figure 3 It can be seen that the second shift fork 252 is located between the inner handle 21 and the outer handle 11. When the outer handle 11 rotates, the second outer flexible cable 13b moves directly toward the outer handle 11. Since the third buckle 14b is located on the side of the second shift fork 252 facing the outer handle 11, the third buckle 14b does not contact the second shift fork 252. That is to say, only when the inner handle 21 rotates, the second buckle 26 on the second inner flexible cable 23b pushes the second shift fork 252 to move to the outer handle 11. The second connecting ends swing toward the direction of the outer handle 11 to push the third buckle 14b on the second outer flexible cable 13b to move toward the direction of the outer handle 11, and when the outer handle 11 itself rotates, the third buckle 14b does not contact the second fork 252, and cannot affect the movement of the second outer flexible cable 13b, that is, the second fork 252 can only be linked with the second outer flexible cable 13b in one direction, and the second fork 252 can only push the second outer flexible cable 13b toward the direction of the outer handle 11.

[0062] It can be seen that the first fork 242 can only move Figure 2 The first outer flexible cable 13a connected to the locking pin 31 on the left side is pulled to the right, which cannot limit the rightward movement of the first outer flexible cable 13a itself when the outer handle 11 is rotated, and the second fork 252 can only be engaged with the rotating shaft 251 to move the first outer flexible cable 13a to the right. Figure 2Even if the second outer flexible cable 13b connected to the locking pin 31 on the middle right side and the bottom is pulled to the left, it cannot limit the leftward movement of the second outer flexible cable 13b itself when the outer handle 11 is rotated. That is to say, whether it is the first inner flexible cable 23a or the second inner flexible cable 23b, it can only pull the corresponding first outer flexible cable 13a and second outer flexible cable 13b when the inner handle 21 is rotated, and it is impossible to limit the first outer flexible cable 13a and second outer flexible cable 13b when the outer handle 11 is rotated. Therefore, no matter what the situation inside the cabin is, no matter whether the inner handle 21 is locked or stuck, the cabin door 201 can be opened from the outside of the cabin by turning the outer handle 11. When an accident occurs and the personnel inside the aircraft are unable to turn and slide the inner handle 21 from the inside to open the cabin door 201, external search and rescue personnel can still open the cabin door 201 from the outside through the outer handle 11, and the cabin door 201 will not be unable to be opened due to the safety latch 214.

[0063] Please combine Figures 1 to 3 In one embodiment, each locking side 203 is correspondingly provided with a lock pin 31, the number of the first outer flexible cables 13a is one, the number of the second outer flexible cables 13b is two, and the inner handle 21 is slidably mounted on the hatch 201, wherein the length of one of the second outer flexible cables 13b is greater than the length of the other second outer flexible cable 13b; the inner handle 21 is used to pull the second connection end corresponding to the shorter second outer flexible cable 13b to swing in a direction away from the third end 212 when rotating, so as to pull the second outer flexible cable 13b to move away from the door latch 205 through the second connection end, and unlock the lock pin 31 from the door latch 205; the inner handle 21 is used to pull the second connection end corresponding to the longer second outer flexible cable 13b to swing in a direction away from the third end 212 when rotating and sliding in the moving direction of the third end 212, so as to pull the second outer flexible cable 13b to move away from the door latch 205 through the second connection end, and unlock the lock pin 31 from the door latch 205.

[0064] If all the inner flexible cables 23 are in a taut state, when the inner handle 21 is rotated, all three lock pins 31 and the door latch 205 will be unlocked, thereby unlocking the cabin door 201 and the fuselage 200. However, if the inner handle 21 is accidentally touched during flight, causing the inner handle 21 to rotate and the cabin door 201 to open, it will cause a huge safety accident. Therefore, one of the two second inner flexible cables 23b will pull the corresponding lock pin 31 and the door latch 205 to unlock with the rotation of the third end 212, while the other second inner flexible cable 23b is longer and in a relaxed state. Therefore, when the inner handle 21 is rotated, When the cabin door 201 is moved, the longer second inner flexible cable 23b will not pull the corresponding second outer flexible cable 13b, and the cabin door 201 will not be completely unlocked. When unlocking the cabin door 201 from the inside, in addition to rotating the inner handle 21, the inner handle 21 needs to be slid and translated. Only then will the longer second inner flexible cable 23b pull the corresponding second outer flexible cable 13b to unlock the locking pin 31. With such a design, even if the inner handle 21 is accidentally touched during flight and causes the inner handle 21 to rotate, the cabin door 201 will not be completely unlocked, thereby greatly improving the overall safety of the cabin door locking structure 100.

[0065] See also Figure 6 In one embodiment, the lock pin 31 includes a lock box 32, a lock rod 33 and an elastic member 34. An installation cavity is formed in the lock box 32, and the lock rod 33 is located in the installation cavity. The two ends of the lock rod 33 are respectively a pulling end and a locking end. The pulling end of the lock rod 33 passes through the box wall of the lock box 32 and is connected to the corresponding external flexible cable 13. The elastic member 34 is located in the installation cavity, and the two ends of the elastic member 34 are respectively abutted against the box wall and the locking end. The locking end is used to move toward the wall of the hatch door 204 under the elastic action of the elastic member 34 to lock with the body 200, or move in a direction away from the wall of the hatch door 204 under the pulling of the external transmission assembly 12 to unlock with the body 200.

[0066] Through the elastic action of the elastic member 34, the locking rod 33 is pressed to lock with the door wall of the hatch door 204, so that the door wall of the hatch door 204 and the locking pin 31 are locked under normal conditions. The locking rod 33 extends out of the lock box 32 and is connected to the external flexible cable 13. The elastic member 34 is compressed by the pulling force of the external transmission component 12, and the pull rod is pulled out of the door wall of the hatch door 204, thereby achieving unlocking. The lock box 32 can protect the locking rod 33 and the elastic member 34, avoid wear or damage to the locking rod 33 and the elastic member 34 caused by the external environment, and extend the service life of the locking pin 31.

[0067] Furthermore, a bolt 205 for locking with the corresponding lock pin 31 is arranged at a position of the door wall of the hatch door 204 corresponding to each lock pin 31, a guide plate 35 is arranged in the installation cavity, a lock rod 33 is slidably penetrated in the guide plate 35, an elastic member 34 is a spring sleeved outside the lock rod 33, a locking block 331 is arranged at the locking end, and both ends of the spring are respectively in contact with the guide plate 35 and the locking block 331, and the bolt 205 has a lock ring 206, and a lock groove 206 is formed in the lock ring 206. 7. A clearance opening 36 is formed on one side of the lock box 32 for the lock ring 206 to enter the installation cavity, and an arc-shaped guide slope 332 is formed on the side of the lock block 331 facing the clearance opening 36; the lock block 331 is used to move toward the corresponding lock ring 206 under the elastic action of the elastic member 34 and be inserted into the lock groove 207 to lock with the door latch 205, or move in the direction away from the lock ring 206 and disengage from the lock groove 207 to unlock with the door latch 205 under the pulling of the external transmission component 12.

[0068] On the one hand, the guide plate 35 can guide the locking rod 33 to prevent the locking rod 33 from being offset or tilted during movement and unable to align with the locking groove 207 of the latch 205. On the other hand, the spring abuts against the guide plate 35, which can reduce the length of the spring and reduce the weight and cost of the locking pin 31. The locking block 331 forms an arc guide slope 332 on the side of the avoidance opening 36. When the hatch 201 is closed, the lock ring 206 abuts against the arc guide slope 332, which makes it easier to generate a thrust on the locking block 331 in the direction away from the lock ring 206, so that after the locking rod 33 and the locking block 331 are pushed away from the lock ring 206, the lock ring 206 extends into the avoidance opening 36, and the elastic force of the spring pushes the locking rod 33 and the locking block 331 toward the lock ring 206, and locks them after being inserted into the lock groove 207.

[0069] In one embodiment, the door bolt 205 is further provided with a Hall sensor 209, and the locking block 331 is provided with a magnet 37 for cooperating with the Hall sensor 209. The magnetic field of the magnet 37 changes with the movement of the locking block 331, and the change of the external magnetic field causes the internal current of the Hall sensor 209 to deviate, thereby generating a Hall voltage inside the sensor, and converting the voltage into a measurable electrical signal, so that the Hall sensor 209 can judge whether the locking block 331 is inserted into the door bolt 205, and thus judge whether the door 201 is locked.

[0070] See also Figure 7In one embodiment, a plug hole 208 is provided in the hatch 201, and a lock hole 213 communicating with the plug hole 208 is provided at a position of the inner handle 21 corresponding to the plug hole 208. The hatch locking structure 100 further includes a safety latch 214. The safety latch 214 can pass through the lock hole 213 and extend into the plug hole 208 to abut against the plug hole 208 to lock the inner handle 21 with the hatch 201. The safety latch 214 can also be pulled out from the lock hole 213 and the plug hole 208 to unlock the inner handle 21 with the hatch 201. When the safety latch passes through the lock hole 213 and extends into the plug hole 208 to abut against the plug hole 208, the inner handle 21 cannot rotate or slide, thereby further avoiding the unlocking of the hatch 201 due to the accidental touch of the inner handle 21, and further improving safety.

[0071] At the same time, it should be noted that since the outer handle 11 can directly pull all the lock pins 31 out of the door latch 205 to unlock the door through the external transmission assembly 12, and the inner handle 21 can only unlock the lock pins 31 from the body 200 by pulling the external transmission assembly 12 through the internal rotation assembly, even if the inner handle 21 is locked by the safety latch 214, it does not affect the function of rotating the outer handle 11 to unlock the cabin door 201. In actual application, after the aircraft takes off, it is usually necessary to insert the safety latch 214 into the lock hole 213 and lock the inner handle 21 to prevent the cabin door 201 from being opened by accidentally touching the inner handle 21 during flight. When an accident occurs and the personnel inside the aircraft are unable to rotate and slide the inner handle 21 from the inside to open the cabin door 201, the external search and rescue personnel can still open the cabin door 201 from the outside through the outer handle 11, and the cabin door 201 will not be unable to be opened due to the safety latch 214.

[0072] In another embodiment, the hatch 201 has three locking sides 203, and each locking side 203 is correspondingly provided with at least one locking pin 31. By providing at least one locking pin 31 on each of the three locking sides 203, the locking points of the three locking pins 31 are arranged in a triangular shape, thereby improving the uniformity of the force applied to the hatch 201 in all directions, thereby improving the locking stability of the hatch 201.

[0073] In one embodiment, the inner handle 21 includes an inner grip 215, an inner connecting rod 216 and an inner rotating arm 217, the inner grip 215 is connected to the inner rotating arm 217 through the inner connecting rod 216, and each inner transmission component 22 is connected to the end of the inner rotating arm 217; the outer handle 11 includes an outer grip 114, an outer connecting rod 115 and an outer rotating arm 116, the outer grip 114 is connected to the outer rotating arm 116 through the outer connecting rod 115, and each outer transmission component 12 is connected to the end of the outer rotating arm 116.

[0074] Through the design of the inner rotating arm 217 and the outer rotating arm 116, the torque of the inner handle 21 is increased, so that the inner flexible cable 23 and the outer flexible cable 13 connected thereto can move a longer distance when the inner handle 21 and the outer handle 11 are rotated at the same angle, so that the inner grip 215 and the outer grip 114 with a smaller size can be selected on the premise of meeting the travel required for unlocking the lock pin 31. Furthermore, the length of the inner rotating arm 217 is greater than the length of the inner handle 21, and the length of the outer rotating arm 116 is greater than the length of the outer handle 11. This further increases the distance that the inner flexible cable 23 and the outer flexible cable 13 can move when rotating at the same angle.

[0075] The present invention further provides a door 201, the door 201 having a hinged side 202 and a locking side 203, the hinged side 202 being hinged to the body 200 of the aircraft so that the door 201 can rotate relative to the body 200 to open or close the hatch 204 of the body 200, and the door 201 is provided with the above-mentioned door locking structure 100. The specific structure of the door locking structure 100 refers to the above-mentioned embodiment, and since the door 201 adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0076] The present invention further provides an aircraft, comprising a fuselage 200 and the above-mentioned door 201, wherein a door 204 is provided on one side of the fuselage 200. The specific structure of the door 201 is referred to the above-mentioned embodiment, and since the present aircraft adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0077] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A door locking structure, characterized in that: The door has a hinged side and a locking side, the hinged side is hinged to the body of the aircraft so that the door can rotate relative to the body to open or close the door opening of the body, and the door locking structure includes: An external locking mechanism, the external locking mechanism comprising an external handle and an external transmission assembly, the external handle being rotatably disposed on the outside of the cabin door, and the external transmission assembly being disposed in the inner cavity of the cabin door; An inner locking mechanism, the inner locking mechanism comprising an inner handle and an inner transmission assembly, the inner handle being rotatably disposed on the inner side of the door and being slidable along the door, the inner transmission assembly being disposed in the inner cavity and being linked with the outer transmission assembly; A locking pin mechanism, the locking pin mechanism comprising a plurality of locking pins, each of the locking pins being connected to the outer transmission assembly and being used to lock with the body when the cabin door closes the cabin door; The outer transmission assembly is used to pull all the lock pins to unlock from the machine body when the outer handle rotates, and the inner transmission assembly is used to pull all the lock pins to unlock from the machine body through the outer transmission assembly when the inner handle rotates and slides; The external transmission assembly includes a plurality of external flexible cables, the number of which is consistent with the number of the locking pins and corresponds one to one, one end of each of the external flexible cables is connected to the external handle, and the other end of each of the external flexible cables is connected to the corresponding locking pin; The inner transmission assembly comprises a plurality of inner flexible cables, the number of the inner flexible cables is consistent with the number of the outer flexible cables and corresponds one to one, one end of each inner flexible cable is linked to the corresponding outer flexible cable, and the other end of each inner flexible cable is connected to the inner handle; Each of the outer flexible cables is used to pull the corresponding locking pin to unlock the lock from the machine body when the outer handle rotates, and each of the inner flexible cables is used to pull the corresponding locking pin to unlock the lock from the machine body through the corresponding outer flexible cable when the inner handle rotates and slides; One end of a portion of the inner flexible cables is linked to the corresponding outer flexible cables through a first transmission assembly, and when the inner handle is rotated, the first transmission assembly drives the corresponding outer flexible cables along the moving direction of the inner flexible cables to pull the locking pin to unlock from the machine body; One end of the remaining inner flexible cable is linked to the corresponding outer flexible cable through a second transmission component, and when the inner handle rotates, or when the inner handle rotates and slides, the corresponding outer flexible cable is driven by the second transmission component in a direction opposite to the moving direction of the inner flexible cable to pull the locking pin to unlock it from the machine body.

2. The door locking structure according to claim 1, characterized in that: The door wall of the hatch door is provided with a door latch corresponding to each of the lock pins for locking with the corresponding lock pin; Each of the outer flexible cables is used to pull the locking pin to unlock the corresponding door latch when the outer handle is rotated; One part of the inner flexible cable is used to drive the corresponding outer flexible cable through the first transmission assembly along the moving direction of the inner flexible cable when the inner handle is rotated, so as to pull the locking pin to unlock from the corresponding door latch; the other part of the inner flexible cable is used to drive the corresponding outer flexible cable through the second transmission assembly along the direction opposite to the moving direction of the inner flexible cable when the inner handle is rotated and slid, so as to pull the corresponding locking pin to unlock from the corresponding door latch.

3. The door locking structure according to claim 2, characterized in that: The outer handle has a first rotating shaft, and opposite ends of the outer handle form a first end and a second end that can rotate around the first rotating shaft, some of the outer flexible cables are first outer flexible cables connected to the first end, and the rest of the outer flexible cables are second outer flexible cables connected to the second end; The inner handle has a second rotating shaft, and one end of the inner handle away from the second rotating shaft forms a third end that can rotate around the second rotating shaft, and multiple inner flexible cables are connected to the third end, and the inner flexible cable linked to the first outer flexible cable through the first transmission component is a first inner flexible cable, and the inner flexible cable linked to the second outer flexible cable through the second transmission component is a second inner flexible cable.

4. The door locking structure according to claim 3, characterized in that: The first transmission assembly includes a fixed shaft, a first shift fork and a first fixing member, the fixed shaft and the first fixing member are both mounted on the hatch, the first fixing member is used for the first inner flexible cable to pass through and provide support for the first inner flexible cable, the first shift fork is sleeved outside the fixed shaft and is in sliding contact with the fixed shaft, the first shift fork is connected to the corresponding first inner flexible cable, the first shift fork is also connected to the corresponding first outer flexible cable, the first outer flexible cable is provided with a first buckle, and the first buckle is located on the side of the first shift fork facing the outer handle; When the inner handle is rotated, the first inner flexible cable drives the first fork to move along the fixed axis toward the third end, so that the first buckle abuts against the first fork and pushes the first outer flexible cable, driving the locking pin connected to the first outer flexible cable to move in a direction away from the corresponding door latch, so as to unlock the locking pin from the corresponding door latch.

5. The door locking structure according to claim 3, characterized in that: The second transmission assembly comprises a rotating shaft, a second shift fork and a second fixing member, the rotating shaft and the second fixing member are both mounted on the hatch, the second fixing member is used for the second inner flexible cable to pass through and provide support for the second inner flexible cable, the second shift fork is rotatably connected to the rotating shaft, the opposite ends of the second shift fork are respectively a first connecting end and a second connecting end, the first connecting end is connected to the corresponding second inner flexible cable, the second connecting end is connected to the corresponding second outer flexible cable, a second buckle is provided on the second inner flexible cable, a third buckle is provided on the second outer flexible cable, and the second buckle and the third buckle are both located on the side of the second shift fork facing the outer handle; When the inner handle rotates, or when the inner handle rotates and slides, the second inner flexible cable pushes the first connection end to swing around the rotation axis toward the third end through the abutment between the second buckle and the first connection end, and pushes the second connection end to swing away from the third end through the abutment between the third buckle and the second connection end, so as to pull the second outer flexible cable to drive the locking pin connected to the second outer flexible cable to move in the direction away from the corresponding door latch, so as to unlock the locking pin from the corresponding door latch.

6. The door locking structure according to claim 5, characterized in that: Each locking side is correspondingly provided with a locking pin, the number of the first outer flexible cable is one, the number of the second outer flexible cable is two, and the length of one of the second outer flexible cables is greater than the length of the other second outer flexible cable; The inner handle is used to pull the second connecting end corresponding to the second outer flexible cable of shorter length to swing in a direction away from the third end when rotating, so as to pull the second outer flexible cable to move in a direction away from the door latch through the second connecting end; The inner handle is used to pull the second connecting end corresponding to the second outer flexible cable of longer length to swing in a direction away from the third end when it rotates and slides in the moving direction of the third end, so as to pull the second outer flexible cable through the second connecting end to move in a direction away from the door latch.

7. The door locking structure according to claim 1, characterized in that: The lock pin includes a lock box, a lock rod and an elastic member. An installation cavity is formed in the lock box. The lock rod is located in the installation cavity. The two ends of the lock rod are respectively a pulling end and a locking end. The pulling end of the lock rod passes through the box wall of the lock box and is connected to the corresponding external flexible cable. The elastic member is located in the installation cavity, and the two ends of the elastic member are respectively abutted against the box wall and the locking end. The locking end is used to move toward the mouth wall of the hatch door under the elastic action of the elastic member to lock with the machine body, or to move in a direction away from the mouth wall of the hatch door under the pulling of the external transmission assembly to unlock with the machine body.

8. The door locking structure according to claim 7, characterized in that: The door wall of the hatch door is provided with a door bolt for locking with the corresponding lock pin at a position corresponding to each of the lock pins, a guide plate is provided in the installation cavity, the lock rod is slidably inserted into the guide plate, the elastic member is a spring sleeved outside the lock rod, a locking block is provided at the locking end, the two ends of the spring are respectively in contact with the guide plate and the locking block, the door bolt has a lock ring, a lock groove is formed in the lock ring, a side of the lock box forms an escape opening for the lock ring to enter the installation cavity, and the lock block forms an arc-shaped guide slope on the side facing the escape opening; The locking block is used to move toward the corresponding locking ring under the elastic action of the elastic member and be inserted into the locking groove to lock with the door latch, or to move in a direction away from the locking ring and disengage from the locking groove to unlock with the door latch under the pulling of the external transmission component.

9. The door locking structure according to claim 8, characterized in that: The door bolt is also provided with a Hall sensor, and the locking block is provided with a magnet for cooperating with the Hall sensor.

10. The hatch door locking structure according to any one of claims 1 to 9, characterized in that: The hatch is provided with a socket, and a lock hole connected to the socket is provided at a position of the inner handle corresponding to the socket. The hatch locking structure further comprises a safety latch, which can pass through the lock hole and extend into the socket to abut against the socket to lock the inner handle with the hatch, and the safety latch can also be pulled out from the lock hole and the socket to unlock the inner handle with the hatch; and / or, The hatch has three locking sides, and each of the locking sides is correspondingly provided with at least one locking pin.

11. A hatch, characterized in that: The door has a hinged side and a locking side, the hinged side is hinged to the fuselage of the aircraft so that the door can rotate relative to the fuselage to open or close the hatch door of the fuselage, and the door is provided with a door locking structure as described in any one of claims 1 to 10.

12. An aircraft, characterized in that: It comprises a machine body and the hatch as claimed in claim 11, wherein the hatch is provided on one side of the machine body.

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