Airplane non-blocking type cabin door latch and lock mechanism thereof

Abstract

The invention belongs to the technical field of design of airplane non-blocking type cabin door latches and locking mechanisms thereof, and particularly relates to an airplane non-blocking type cabin door latch and a locking mechanism thereof. A plurality of latch hooks are matched with latch pins to latch a cabin door, the cabin door can be gradually tensioned in the latching process, a special in-place device is not needed, the cabin door is latched and unlatched, and the cabin door is locked and unlocked. And the handle is used for sequentially driving through the transmission mechanism, so that the whole structure is simple, the weight is relatively light, and the operability is good.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft non-blocking cabin door latch and its locking mechanism design, and specifically relates to an aircraft non-blocking cabin door latch and its locking mechanism. Background Art

[0002] A latch mechanism and a lock mechanism are often provided on a non-blocking cabin door of an aircraft. When the cabin door is closed, the latch mechanism is latched to prevent the cabin door from opening, and the lock mechanism is locked to prevent the latch mechanism from being unlatched. When the cabin door is opened, the lock mechanism needs to be unlocked and the latch mechanism unlatched.

[0003] Currently, the latch mechanism mainly includes:

[0004] The cam latch is installed on the hatch. After the hatch is closed, the cam latch rotates around its own axis and engages with the latch pin fixed on the door frame to latch the hatch. Before the cam latch is latched, the latch notch and the latch pin need to be coaxial. Due to the tension of the sealing belt between the hatch and the door frame, an additional set of positioning devices needs to be added to tighten the hatch so that the latch notch and the latch pin are coaxial. The overall structure is complex and heavy.

[0005] A latch type latch has a latch installed on the hatch. After the hatch is closed, the latch is pushed into the latch hole on the door frame. Due to the tension of the sealing belt between the hatch and the door frame, it is difficult to completely align the latch with the latch hole. A large operating force is required to push the latch into the latch hole, and the operability is poor.

[0006] In addition, current lock mechanisms are often complex in structure and require separate actuation, and have poor coordination with latch mechanisms.

[0007] This application is proposed in view of the above-mentioned technical defects. Summary of the invention

[0008] The purpose of the present application is to provide an aircraft non-blocking cabin door latch and a locking mechanism thereof, so as to overcome or alleviate at least one aspect of the known technical defects.

[0009] The technical solution of this application is:

[0010] An aircraft non-blocking cabin door latch and a locking mechanism thereof, comprising:

[0011] drive shaft, mounted on the hatch;

[0012] a handle connected to the drive shaft;

[0013] A drive head is connected to the drive shaft and has a latch drive head and a lock drive head;

[0014] Support shaft, mounted on the hatch;

[0015] A latch driving rocker arm is connected to the support shaft and has a latch driving boss thereon;

[0016] a latch, attached to the door frame;

[0017] A latch hook is hinged on the hatch and has a latch stop boss thereon, and is connected to the latch drive rocker arm through a latch drive mechanism;

[0018] The lock driving rocker arm is sleeved on the supporting shaft and has a lock driving boss thereon;

[0019] A lock block is arranged on the door, has a lock cam thereon, and is connected to the lock driving rocker arm through a lock transmission mechanism;

[0020] After the hatch is closed, the latch hook hooks the lock pin, latches the hatch, and locks the hatch in the closed position, and the locking cam abuts against the latch stopping boss, locks each latch hook, and locks the latch hook in the latched position;

[0021] When the handle is lifted outward, the driving shaft drives the driving head to rotate, so that the lock driving head abuts against the lock driving boss, and then through the lock driving rocker arm and the lock transmission mechanism, the lock block rotates, so that the lock stopping cam disengages from the latch stopping boss, thereby unlocking the latch hook. Thereafter, the lock driving head disengages from the lock driving boss, and the latch driving head abuts against the latch driving boss, and then through the latch transmission rocker arm and the latch transmission mechanism, the latch hook is driven to disengage from the latch pin, thereby unlatching the hatch door. At this time, the hatch door can be opened outward.

[0022] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, when the cabin door is closed, the handle is pressed downward, the drive shaft drives the drive head to rotate, the latch drive head abuts against the latch drive boss, and then through the latch transmission rocker arm and the latch transmission mechanism, drives the latch hook to hook the locking pin, latches the cabin door, and locks the cabin door in the closed position, thereafter, the latch drive head disengages from the latch drive boss, causes the lock drive head to abut against the lock drive boss, and then through the lock drive rocker arm and the lock transmission mechanism, causes the lock block to rotate, causes the lock stop cam to abut against the latch stop boss, locks each latch hook, and locks the latch hook in the latched position.

[0023] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, the drive shaft is installed on the inner side of the cabin door.

[0024] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, the latch pin is arranged at the top of the door frame.

[0025] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, there are multiple latch hooks and their corresponding latch pins and locking blocks.

[0026] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, the latch transmission mechanism includes a latch transmission shaft, a latch first transmission rocker arm, a latch first transmission connecting rod, a latch second transmission rocker arm, a latch third transmission rocker arm, a latch second transmission connecting rod, and a latch third transmission connecting rod;

[0027] The latch drive shaft is mounted on the hatch;

[0028] The first drive rocker arm of the latch is connected to the latch drive shaft;

[0029] The first latch transmission connecting rod is hinged between the latch transmission rocker arm and the latch transmission rocker arm;

[0030] The second latch transmission rocker arm is connected to the latch transmission shaft;

[0031] The third transmission rocker arm of the bolt is hinged on the inner side of the door;

[0032] The second transmission connecting rod of the bolt is hinged between the second transmission rocker arm of the bolt and the third transmission rocker arm of the bolt;

[0033] The third transmission connecting rod of the bolt is hinged between the third transmission rocker arm of the bolt and the bolt hook.

[0034] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, there are multiple latch second transmission rocker arms and their corresponding latch third transmission rocker arms, latch second transmission connecting rods, and latch third transmission connecting rods.

[0035] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, each latch has a latch limiting protrusion on the third transmission rocker arm;

[0036] The aircraft non-blocking door latch and its locking mechanism also include:

[0037] A plurality of latch limit pins are connected to the hatch, and when the hatch is closed, they cooperate with the third transmission rocker arms of each latch to limit further rotation of each latch hook after hooking the latch pin.

[0038] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, the lock transmission mechanism includes a lock transmission shaft, a lock transmission rocker arm, and a lock transmission connecting rod;

[0039] The lock drive shaft is mounted on the hatch;

[0040] The lock transmission rocker arm is connected to the lock transmission shaft;

[0041] The lock transmission connecting rod is hinged between the lock driving rocker arm and the lock transmission rocker arm.

[0042] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, the lock transmission shaft is installed on the inner side of the cabin door 35.

[0043] Optionally, the above-mentioned aircraft non-blocking door latch and locking mechanism thereof further include:

[0044] Two locking pins, connected to both sides of the door frame;

[0045] Two U-shaped locks are installed on both sides of the door through a rotating shaft and connected to the connecting rod connecting mechanism between the lock transmission shaft;

[0046] After the hatch is closed, the U-shaped slot openings of the two U-shaped locks deflect to the side, locking the two lock pins;

[0047] Lift the handle outward, and the lock transmission shaft drives the two U-shaped locks to rotate through the connecting rod connection mechanism, so that the U-shaped grooves of the two U-shaped locks open outward;

[0048] When the hatch is closed, the handle is pressed down, and the lock drive shaft drives the two U-shaped locks to rotate through the connecting rod connection mechanism, so that the U-shaped slots of the two U-shaped locks open outward and the openings are tilted to the side, buckling the two locking pins.

[0049] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, the two locking pins are located in the middle of both sides of the door frame.

[0050] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and locking mechanism thereof, the connecting rod connecting mechanism includes a first connecting rocker arm, a second connecting rocker arm, a third connecting rocker arm, a first connecting rod, and a second connecting rod;

[0051] There are two first connecting rocker arms connected to two rotating shafts;

[0052] The second connecting rocker has two arms, hinged on the inside of the door;

[0053] There are two third connecting rocker arms, which are connected to both ends of the lock transmission shaft;

[0054] There are two first connecting rods, which are hinged between the two first connecting rocker arms and the second connecting rocker arms;

[0055] There are two second connecting rods, which are hinged between the two second connecting rocker arms and the third connecting rocker arm.

[0056] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, the handle is arranged in a handle groove on the outside of the cabin door.

[0057] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, after the cabin door is closed, the handle is in the handle groove and is flush with the outer side of the cabin door.

[0058] Optionally, in the above-mentioned aircraft non-blocking cabin door latch and its locking mechanism, each latch hook has two latch stop bosses, and each lock block has two lock stop cams.

[0059] This application has at least the following beneficial technical effects:

[0060] Provided are an aircraft non-blocking door latch and a locking mechanism thereof, which are designed to latch the door using a plurality of latch hooks in cooperation with a latch pin, and can gradually tighten the door during the latching process, without the need for a special locking device, and can latch and unlatch the door, and lock and unlock each latch hook, and are sequentially driven by a handle through a transmission mechanism, with a simple overall structure, light weight, and good operability. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a structural schematic diagram of an aircraft non-blocking cabin door latch and its locking mechanism provided by an embodiment of the present application;

[0062] Figure 2 It is a schematic diagram of an aircraft non-blocking cabin door latch and its locking mechanism provided by an embodiment of the present application being installed on a cabin door and its door frame;

[0063] Figure 3 is a schematic diagram of the structure of a latch hook provided in an embodiment of the present application;

[0064] Figure 4 It is a schematic diagram provided by an embodiment of the present application;

[0065] Figure 5 It is a structural schematic diagram of a lock block provided in an embodiment of the present application;

[0066] Figure 6 is a schematic structural diagram of a third transmission rocker arm of a latch provided in an embodiment of the present application;

[0067] Figure 7 It is a schematic diagram of the structure of latching a door and locking each latch hook (7) provided in an embodiment of the present application;

[0068] Figure 8 yes Figure 7 Schematic diagram of the local structure;

[0069] Fig. 9 It is a schematic diagram of the U-shaped grooves of two U-shaped locks provided in an embodiment of the present application being tilted to the side to buckle two locking pins;

[0070] Fig.10 is a schematic diagram of a structure for unlocking each latch hook provided in an embodiment of the present application;

[0071] Fig.11 yes Fig.10 Schematic diagram of the local structure;

[0072] Fig.12 is a schematic diagram of two U-shaped locks provided in an embodiment of the present application with their U-shaped grooves opening outward;

[0073] Fig.13 It is a schematic diagram of the structure of unlatching a hatch provided by an embodiment of the present application;

[0074] Fig.14 yes Fig.13 Schematic diagram of the local structure;

[0075] Fig.15 This is a schematic diagram of a hatch door opening outwards provided in an embodiment of the present application;

[0076] in:

[0077] 1-drive shaft; 2-handle; 3-drive head; 4-support shaft; 5-latch drive rocker arm; 6-latch pin; 7-latch hook; 8-latch drive shaft; 9-latch first drive rocker arm; 10-latch first drive connecting rod; 11-latch second drive rocker arm; 12-latch third drive rocker arm; 13-latch second drive connecting rod; 14-latch third drive connecting rod; 15-latch stop boss; 16-latch drive rocker arm; 17-latch drive head; 18-latch Driving head; 19-locking block; 20-locking cam; 21-locking transmission shaft; 22-latch limiting protrusion; 23-latch limiting pin; 24-lock transmission rocker arm; 25-lock transmission connecting rod; 26-U-shaped lock; 27-rotating shaft; 28-first connecting rocker arm; 29-second connecting rocker arm; 30-third connecting rocker arm; 31-first connecting rod; 32-second connecting rod; 33-locking pin; 34-door frame; 35-hatch door.

[0078] In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and should not be construed as limitations on the present application. DETAILED DESCRIPTION

[0079] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be described in further detail in detail and in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design.

[0080] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall have the usual meanings understood by those of ordinary skill in the art to which this application belongs. The words used in the description of this application to indicate orientation are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. The word "include" used in the description of this application indicates that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects.

[0081] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installation", "connection" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Technical personnel in the field can understand its specific meaning in this application according to the specific circumstances.

[0082] A non-blocking aircraft door latch and its locking mechanism, such as Figure 1-Figure 2 As shown, it includes a drive shaft 1, a handle 2, a drive head 3, a support shaft 4, a latch drive rocker arm 5, a latch pin 6, a latch hook 7, a lock drive rocker arm 16, a lock block 19, a latch limit pin 23, a U-shaped lock 26, and a lock pin 33.

[0083] The drive shaft 1 is installed inside the cabin door 35 .

[0084] The handle 2 is connected to the driving shaft 1 and can be arranged in a handle slot on the outside of the cabin door.

[0085] The drive head 3 is connected to the drive shaft 1 and has a latch drive head 17 and a lock drive head 18 thereon.

[0086] The support shaft 4 is installed inside the door 35 .

[0087] The latch driving rocker arm 5 is connected to the supporting shaft 4 and has a latch driving boss thereon.

[0088] There are multiple latch pins 6 connected to the door frame 34 and can be set at the top of the door frame 34.

[0089] Latch hook 7 Figure 3 As shown, there are multiple latches, which are hinged on the inner side of the hatch 35 and have a latch stopping boss 15, which are connected to the latch transmission rocker arm 5 through a latch transmission mechanism. The latch transmission mechanism includes a latch transmission shaft 8, a first latch transmission rocker arm 9, a first latch transmission connecting rod 10, a second latch transmission rocker arm 11, a third latch transmission rocker arm 12, a second latch transmission connecting rod 13, and a third latch transmission connecting rod 14.

[0090] The latch transmission shaft 8 is installed inside the hatch 35 .

[0091] The first latch transmission rocker arm 9 is connected to the latch transmission shaft 8.

[0092] The first latch transmission connecting rod 10 is hinged between the latch transmission rocker arm 5 and the latch transmission rocker arm 9.

[0093] There are multiple second latch transmission rocker arms 11 connected to the latch transmission shaft 8.

[0094] There are multiple third latch transmission rocker arms 12, which are hinged to the inner side of the door 35, as shown in Figure 4, and have latch limiting protrusions 22 thereon.

[0095] There are multiple latch limit pins 23 connected to the inner side of the hatch 35.

[0096] There are multiple second latch transmission connecting rods 13, which are hinged between the second latch transmission rocker arms 11 and the third latch transmission rocker arms 12.

[0097] There are multiple third latch transmission connecting rods 14, which are hinged between each third latch transmission rocker arm 12 and the latch hook 7.

[0098] The lock driving rocker arm 16 is sleeved on the support shaft 4 and has a lock driving boss thereon.

[0099] Lock block 19 as Figure 5 As shown, there are multiple ones, which are arranged on the inner side of the cabin door 35, with a locking cam 20 thereon, and are connected to the lock driving rocker arm 16 through a lock transmission mechanism. The lock transmission mechanism includes a lock transmission shaft 21, a lock transmission rocker arm 24, and a lock transmission connecting rod 25.

[0100] The lock transmission shaft 21 is installed on the inner side of the cabin door 35 .

[0101] The lock transmission rocker arm 24 is connected to the lock transmission shaft 21 .

[0102] The lock transmission connecting rod 25 is hinged between the lock driving rocker arm 16 and the lock transmission rocker arm 24 .

[0103] U-lock 26 Figure 6 As shown, there are two of them, which are installed on the inner side of the cabin door 35 through the rotating shaft 27, located on both sides of the cabin door 35, and connected to the connecting rod connection mechanism between the lock transmission shaft 21. The connecting rod connection mechanism includes a first connecting rocker arm 28, a second connecting rocker arm 29, a third connecting rocker arm 30, a first connecting rod 31, and a second connecting rod 32.

[0104] There are two first connecting rocker arms 28 connected to the two rotating shafts 27 .

[0105] There are two second connecting rocker arms 29 , which are hinged to the inner side of the cabin door 35 .

[0106] There are two third connecting rocker arms 30 connected to both ends of the lock transmission shaft 21 .

[0107] There are two first connecting rods 31 , which are hinged between the two first connecting rocker arms 28 and the two second connecting rocker arms 29 .

[0108] There are two second connecting rods 32 , which are hinged between the two second connecting rocker arms 29 and the third connecting rocker arms 30 .

[0109] There are two locking pins 33 connected to both sides of the door frame 34 and located in the middle.

[0110] After the hatch 35 is closed, the handle 2 is in the handle groove and flush with the outer side of the hatch 35. Each latch hook 7 hooks each lock pin 6 to latch the hatch 35 and lock the hatch 35 in the closed position. Each locking cam 20 abuts against each latch stop boss 15 to restrict each latch hook 7 from rotating counterclockwise and lock each latch hook 7 to lock each latch hook 7 in the latched position. Figure 7-Figure 8 As shown, in addition, the U-shaped slot openings of the two U-shaped locks 26 are tilted to the side, buckling the two locking pins 33, as shown in FIG. Fig. 9 As shown, the outward deformation of the hatch door 35 can be effectively limited, so that the hatch door 35 and the hatch door frame 34 can keep the sealing belt pressed therebetween, thereby ensuring the sealing between the hatch door 35 and the hatch door frame 34.

[0111] When opening the hatch, the handle 2 can be lifted outwards, and the drive head 3 can be driven to rotate via the drive shaft 1, so that the lock drive head 18 is first abutted against the lock drive boss, and then the lock drive rocker arm 16, the lock drive connecting rod 25, and the lock drive rocker arm 24 drive the lock drive shaft 21 to rotate, so that each lock block 19 rotates counterclockwise, so that each lock stop cam 20 is separated from each latch stop boss 15, and each latch hook 7 is unlocked. Figure 10-11 As shown, at the same time, the lock transmission shaft 21 drives the two U-shaped locks 26 to rotate clockwise through the two third connecting rocker arms 30, the second connecting rod 32, the second connecting rocker arm 29, the first connecting rod 31, and the first connecting rocker arm 28, so that the U-shaped grooves of the two U-shaped locks 26 open outward, as shown in FIG. Fig.12 As shown, thereafter, the lock driving head 18 is disengaged from the lock driving boss, and the latch driving head 17 abuts against the latch driving boss, and then drives each of the second latch transmission rocker arms 11 and the third latch transmission rocker arms 12 to rotate through the latch transmission rocker arm 5, the first latch transmission connecting rod 10, the latch transmission rocker arm 9, and the latch transmission shaft 8, so that each latch hook 7 rotates counterclockwise and disengages from each latch pin 6, thereby unlatching the hatch door 35, as shown in FIG. Figure 13-14 As shown, at this time, the hatch 35 can be opened outwards, and the hatch 35 is opened outwards as shown in FIG. Fig.15 shown.

[0112] When the hatch door is closed, the handle 12 can be pressed into the handle groove to drive the drive shaft 1 to drive the drive head 3 to rotate, first making the latch drive head 17 abut against the latch drive boss, and then driving the latch drive rocker arm 5, the first latch drive connecting rod 10, the latch drive rocker arm 9, and the latch drive shaft 8 to drive each latch second drive rocker arm 11 and the third latch drive rocker arm 12 to rotate, so that each latch hook 7 rotates clockwise to hook each latch pin 6, latch the hatch door 35, and lock the hatch door 35 in the closed position, and each latch limit pin 23 cooperates with the latch limit protrusion 22 to limit each latch hook 7 from further rotation, and then the latch drive head 17 disengages from the latch drive boss, and the lock drive head 18 abuts against the latch drive boss. It leans against the lock driving boss, and then drives the lock drive shaft 21 to rotate through the lock driving rocker arm 16, the lock transmission connecting rod 25, and the lock transmission rocker arm 24, so that each lock block 19 rotates counterclockwise, and each lock cam 20 leans against each latch stopping boss 15, restricting each latch hook 7 from rotating counterclockwise, and locking each latch hook 7. At the same time, the lock transmission shaft 21 drives the two U-shaped locks 26 to rotate counterclockwise through the two third connecting rocker arms 30, the second connecting connecting rod 32, the second connecting rocker arm 29, the first connecting connecting rod 31, and the first connecting rocker arm 28, so that the U-shaped grooves of the two U-shaped locks 26 open outward, the openings are tilted to the side, and the two lock pins 33 are buckled.

[0113] In the aircraft non-blocking door latch and its locking mechanism disclosed in the above embodiment, each latch hook 7 may be designed to have two latch stop bosses 15 and each lock block 19 may have two latch stop cams 20 .

[0114] The aircraft non-blocking door latch and its locking mechanism disclosed in the above-mentioned embodiment are designed to use multiple latch hooks 7 to cooperate with the latch pin 6 to latch the door 35. The door 35 can be gradually tightened during the latching process. No special positioning device is required. The door 35 can be latched and unlatched, and each latch hook 7 can be locked and unlocked. The handle 2 is used to sequentially drive through the transmission mechanism. The overall structure is simple, the weight is light, and the operability is good.

[0115] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. An aircraft non-blocking door latch and its locking mechanism, characterized in that: include: A drive shaft (1) mounted on the cabin door (35); A handle (2) connected to the drive shaft (1); A drive head (3) connected to the drive shaft (1) and having a latch drive head (17) and a lock drive head (18); A support shaft (4) mounted on the cabin door (35); A latch driving rocker arm (5) is connected to the support shaft (4) and has a latch driving boss thereon; A latch (6) connected to the door frame (34); A latch hook (7) is hinged on the door (35) and has a latch stop boss (15) thereon, and is connected to the latch drive rocker arm (5) via a latch drive mechanism; A lock driving rocker arm (16) is sleeved on the support shaft (4) and has a lock driving boss thereon; A lock block (19) is arranged on the cabin door (35) and has a lock cam (20) thereon, and is connected to the lock driving rocker arm (16) via a lock transmission mechanism; After the hatch (35) is closed, the latch hook (7) hooks the lock pin (6) to latch the hatch (35) and lock the hatch (35) in the closed position, and the locking cam (20) abuts against the latch stop boss (15) to lock each latch hook (7) and lock the latch hook (7) in the latched position; When the handle (2) is lifted outward, the driving shaft (1) drives the driving head (3) to rotate, so that the lock driving head (18) abuts against the lock driving boss, and then through the lock driving rocker arm (16) and the lock transmission mechanism, the lock block (19) rotates, so that the lock stop cam (20) is separated from the latch stop boss (15), and the latch hook (7) is unlocked. Thereafter, the lock driving head (18) is separated from the lock driving boss, and the latch driving head (17) abuts against the latch driving boss, and then through the latch transmission rocker arm (5) and the latch transmission mechanism, the latch hook (7) is driven to separate from the latch pin (6), and the hatch (35) is unlatched. At this time, the hatch (35) can be opened outward.

2. The aircraft non-blocking door latch and locking mechanism thereof according to claim 1, characterized in that: When the hatch door is closed, the handle (2) is pressed downward, the driving shaft (1) drives the driving head (3) to rotate, the latch driving head (17) abuts against the latch driving boss, and then drives the latch hook (7) to hook the lock pin (6) through the latch transmission rocker arm (5) and the latch transmission mechanism, and latches the hatch door (35) to lock the hatch door (35) in the closed position. Thereafter, the latch driving head (17) disengages from the latch driving boss, causing the lock driving head (18) to abut against the lock driving boss, and then causes the lock block (19) to rotate through the lock driving rocker arm (16) and the lock transmission mechanism, causing the lock stop cam (20) to abut against the latch stop boss (15), locking each latch hook (7) and locking the latch hook (7) in the latched position.

3. The aircraft non-blocking door latch and its locking mechanism according to claim 2, characterized in that: The drive shaft (1) is mounted on the inner side of the cabin door (35).

4. The aircraft non-blocking door latch and locking mechanism thereof according to claim 3, characterized in that: The latch (6) is arranged on the top of the door frame (34).

5. The aircraft non-blocking door latch and locking mechanism thereof according to claim 4, characterized in that: There are a plurality of latch hooks (7) and corresponding latch pins (6) and locking blocks (19).

6. The aircraft non-blocking door latch and locking mechanism thereof according to claim 5, characterized in that: The latch transmission mechanism comprises a latch transmission shaft (8), a latch first transmission rocker arm (9), a latch first transmission connecting rod (10), a latch second transmission rocker arm (11), a latch third transmission rocker arm (12), a latch second transmission connecting rod (13), and a latch third transmission connecting rod (14); The latch drive shaft (8) is mounted on the cabin door (35); The first latch transmission rocker arm (9) is connected to the latch transmission shaft (8); The first latch transmission connecting rod (10) is hinged between the latch transmission rocking arm (5) and the latch transmission rocking arm (9); The second latch transmission rocker arm (11) is connected to the latch transmission shaft (8); The third transmission rocker arm (12) of the bolt is hinged on the inner side of the cabin door (35); The second latch transmission connecting rod (13) is hinged between the second latch transmission rocker arm (11) and the third latch transmission rocker arm (12); The third latch transmission connecting rod (14) is hinged between the third latch transmission rocker arm (12) and the latch hook (7).

7. The aircraft non-blocking door latch and locking mechanism thereof according to claim 6, characterized in that: There are a plurality of latch second transmission rocker arms (11) and their corresponding latch third transmission rocker arms (12), latch second transmission connecting rods (13) and latch third transmission connecting rods (14).

8. The aircraft non-blocking door latch and locking mechanism thereof according to claim 7, characterized in that: Each latch third transmission rocker arm (12) is provided with a latch limiting protrusion (22); The aircraft non-blocking door latch and its locking mechanism also include: A plurality of latch limiting pins (23) are connected to the hatch (35) and cooperate with the third transmission rocker arms (12) of each latch when the hatch is closed to limit the further rotation of each latch hook (7) after it is hooked tightly to the latch pin (6).

9. The aircraft non-blocking door latch and locking mechanism thereof according to claim 8, characterized in that: The lock transmission mechanism comprises a lock transmission shaft (21), a lock transmission rocker arm (24), and a lock transmission connecting rod (25); The lock transmission shaft (21) is mounted on the cabin door (35); The lock transmission rocker arm (24) is connected to the lock transmission shaft (21); The lock transmission connecting rod (25) is hinged between the lock driving rocker arm (16) and the lock transmission rocker arm (24).

10. The aircraft non-blocking door latch and locking mechanism thereof according to claim 9, characterized in that: The lock transmission shaft (21) is installed on the inner side of the cabin door 35.

11. The aircraft non-blocking door latch and locking mechanism thereof according to claim 10, characterized in that: Also includes: Two locking pins (33) connected to both sides of the door frame (34); Two U-shaped locks (26) are installed on both sides of the door (35) through a rotating shaft (27) and connected to the connecting rod connecting mechanism between the lock transmission shaft (21); After the hatch (35) is closed, the U-shaped slot openings of the two U-shaped locks (26) are tilted to the side, locking the two lock pins (33); The handle (2) is lifted outward, and the lock transmission shaft (21) drives the two U-shaped locks (26) to rotate through the connecting rod connection mechanism, so that the U-shaped grooves of the two U-shaped locks (26) open outward; When the hatch is closed, the handle (2) is pressed downward, and the lock transmission shaft (21) drives the two U-shaped locks (26) to rotate through the connecting rod connection mechanism, so that the U-shaped slots of the two U-shaped locks (26) open outward, the openings are biased to the side, and the two lock pins (33) are buckled.

12. The aircraft non-blocking door latch and locking mechanism thereof according to claim 11, characterized in that: Two locking pins (33) are located at the middle parts of both sides of the door frame (34).

13. The aircraft non-blocking door latch and locking mechanism thereof according to claim 12, characterized in that: The connecting rod connection mechanism comprises a first connecting rocker arm (28), a second connecting rocker arm (29), a third connecting rocker arm (30), a first connecting rod (31), and a second connecting rod (32); There are two first connecting rocker arms (28) connected to the two rotating shafts (27); There are two second connecting rocker arms (29) which are hinged to the inner side of the cabin door (35); There are two third connecting rocker arms (30) connected to both ends of the lock transmission shaft (21); There are two first connecting rods (31), which are hinged between the two first connecting rocker arms (28) and the second connecting rocker arms (29); There are two second connecting rods (32), which are hinged between the two second connecting rocker arms (29) and the third connecting rocker arm (30).

14. The aircraft non-blocking door latch and locking mechanism thereof according to claim 13, characterized in that: The handle (2) is arranged in a handle groove on the outside of the cabin door.

15. The aircraft non-blocking door latch and locking mechanism thereof according to claim 14, characterized in that: After the hatch door (35) is closed, the handle (2) is in the handle groove and is flush with the outer side of the hatch door (35).

16. The aircraft non-blocking door latch and locking mechanism thereof according to claim 15, characterized in that: Each latch hook (7) has two latch stop bosses (15), and each lock block (19) has two latch stop cams (20).

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