CN112357051A - Flap lock structure and flap device - Google Patents
Flap lock structure and flap device Download PDFInfo
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- CN112357051A CN112357051A CN202011452511.9A CN202011452511A CN112357051A CN 112357051 A CN112357051 A CN 112357051A CN 202011452511 A CN202011452511 A CN 202011452511A CN 112357051 A CN112357051 A CN 112357051A
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- lock
- opening
- flap
- base
- sliding device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/14—Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
- B64C1/1407—Doors; surrounding frames
- B64C1/1446—Inspection hatches
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vehicle Step Arrangements And Article Storage (AREA)
Abstract
The invention discloses a flap lock structure, which comprises a lock seat, wherein the upper surface of the lock seat is a plane, and the lower surface of the lock seat is provided with a sliding device and a pressing device; the lock seat is provided with an opening, the sliding module transversely moves in the opening, and the pressing device vertically moves up and down in the opening; when the sliding device transversely moves to the rightmost side of the opening, the pressing device is pressed below the sliding device, the sliding device does not exceed the side surface of the lock seat, and the opening cover lock is in an unlocking state; when the sliding device transversely moves to the leftmost side of the opening, the pressing device bounces and is fixed in the opening, the pressing device limits the transverse movement of the sliding device in the opening, the sliding device protrudes out of the side face of the lock base, and the flap lock is in a locking state at the moment. The flap lock structure in this application, easy operation, simple to operate effectively solve in the current flap lock button lock structure complicated, assembly efficiency slow and the short technical problem of live time.
Description
Technical Field
The invention relates to the technical field of airplane structure design, in particular to a flap lock structure and a flap device.
Background
For the needs of daily use, maintenance and inspection, a plurality of large and small flaps are usually arranged on the skin of the airplane, most bearing flaps are connected with the airplane structure in a screw supporting plate nut or quick-release lock mode, and for some small non-bearing flaps, quick response is required, so that the small non-bearing flaps can be quickly opened. In order to realize the quick opening of the airplane flap, the flap is mostly provided with a snap (button) lock mechanism, the lock structure is simple to operate, but the structure is complex, the manufacturing and assembling efficiency is low, and the situation that the flap is difficult to open due to the corrosion problem can also occur under the long-term use situation.
Disclosure of Invention
The invention aims to provide a flap lock structure and a flap device, which are simple in structure, convenient to operate, long in service life and capable of quickly opening an airplane flap.
In order to solve the technical problem, the invention provides a flap lock structure, which comprises a lock base, wherein the upper surface of the lock base is a plane, and the lower surface of the lock base is provided with a sliding device and a pressing device; the lock seat is provided with an opening, the sliding module transversely moves in the opening, and the pressing device vertically moves up and down in the opening; when the sliding device transversely moves to the rightmost side of the opening, the pressing device is pressed below the sliding device, the sliding device does not exceed the side surface of the lock seat, and the opening cover lock is in an unlocking state; when the sliding device transversely moves to the leftmost side of the opening, the pressing device bounces and is fixed in the opening, the pressing device limits the transverse movement of the sliding device in the opening, the sliding device protrudes out of the side face of the lock base, and the flap lock is in a locking state at the moment.
In an optional embodiment of the present application, the sliding device includes a sliding rail and a latch, and the sliding rail is fixed on the lower surface of the lock base; the spring bolt slides in the slide rail, spring bolt one end is fixed in the slide rail, the other end sets up in the trompil.
In an optional embodiment of the present application, the pressing device includes a box body, a spring, a base, and a top block, the box body is hollow, and the spring is fixed inside the box body; one end of the top block is fixed at the upper end of the spring, and the other end of the top block vertically moves up and down in the open hole under the action of the spring; the box body is fixed on the base, and the base is fixed on the lower surface of the lock seat.
In an alternative embodiment of the present application, the locking bolt is of the type "(+/-) comprising a bottom and an end, the bottom laterally moving within the slide rail and the end laterally moving within the opening.
In an optional embodiment of the present application, the top block is a "convex" shape, and includes a base and a protrusion, the base and the protrusion are integrally formed, the base is connected to the spring, and the protrusion vertically moves up and down in the opening under the action of the spring; when the lock is unlocked, the end part transversely moves to the rightmost side of the opening, the protrusion is pressed below the bottom part, and the bottom part does not exceed the side surface of the lock seat; when the lock is in a locking state, the end part moves transversely to the leftmost side of the opening, the protrusion is fixed in the opening in a bouncing manner, the opening is full of the protrusion and the end part, the protrusion limits the transverse movement of the end part in the opening, and the bottom part protrudes out of the side face of the lock seat.
In an alternative embodiment of the present application, the outer surface of the end portion is flush with the upper surface of the lock base.
In an optional embodiment of the present application, in the locked state, the outer surface of the protrusion is flush with the upper surface of the lock base.
In an optional embodiment of the present application, a groove is provided in the middle of the locking tongue.
The present application further provides a flap assembly comprising a body and a flap lock structure as described in any of the previous embodiments.
The invention provides a cover lock structure, which comprises a lock seat, wherein the upper surface of the lock seat is a plane, and the lower surface of the lock seat is provided with a sliding device and a pressing device; the lock seat is provided with an opening, the sliding module transversely moves in the opening, and the pressing device vertically moves up and down in the opening; when the sliding device transversely moves to the rightmost side of the opening, the pressing device is pressed below the sliding device, the sliding device does not exceed the side surface of the lock seat, and the opening cover lock is in an unlocking state; when the sliding device transversely moves to the leftmost side of the opening, the pressing device bounces and is fixed in the opening, the pressing device limits the transverse movement of the sliding device in the opening, the sliding device protrudes out of the side face of the lock base, and the flap lock is in a locking state at the moment.
According to the flap lock structure, the design that the sliding device and the pressing device are combined is adopted, the sliding device is transversely moved to the leftmost side of the opening and pushed into the lower portion of the airplane mouth frame, the pressing device is introduced to limit the movement of the sliding device, and the flap is locked; and the pressing device is pressed down, the sliding device transversely moves to the rightmost side of the opening to push away from the airplane opening frame, and the pressing device is pressed below the sliding device to open the opening cover. The flap lock structure in this application, easy operation, simple to operate effectively solve in the current flap lock button lock structure complicated, assembly efficiency slow and the short technical problem of live time.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flap lock according to an embodiment of the present application.
Fig. 2 is an assembly schematic view of a sliding device of a flap lock structure according to an embodiment of the present disclosure.
Fig. 3 is a cross-sectional view taken along line a-a of fig. 2.
Fig. 4 is an assembly schematic view of a pressing device of a flap lock structure according to an embodiment of the present application.
Fig. 5 is an exploded schematic structural diagram of a flap lock structure according to an embodiment of the present application.
Fig. 6 is a schematic locking state diagram of a flap lock structure according to an embodiment of the present application.
Fig. 7 is a schematic view illustrating an open state of a flap lock structure according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
As shown in fig. 1 and fig. 5, fig. 1 is a schematic view of a structure of a flap lock provided in an embodiment of the present application, and fig. 5 is a schematic view of an exploded structure of the flap lock provided in the embodiment of the present application, where the structure of the flap lock may include:
a lock base 1;
the upper surface of the lock seat is a plane, and the lower surface of the lock seat is provided with a sliding device and a pressing device; the lock seat is provided with an opening, the sliding module transversely moves in the opening, and the pressing device vertically moves up and down in the opening;
it should be noted that the upper surface of the lock seat 1 in this embodiment is a plane, which facilitates the lock seat to be fixed on the flap, or the lock seat 1 in this embodiment is directly a flap structure, that is, the flap structure is directly provided with a flap lock structure. The shape of the lock base is not particularly limited in this application, and may be rectangular, square, or other suitable shape.
The lower surface of the lock seat 1 is provided with a sliding device 2 and a pressing device 3, the lock seat 1 is provided with a hole 11, the sliding device 2 transversely moves in the hole 11, and the pressing device 3 vertically moves in the hole up and down.
Wherein the sliding device 2 is used for opening and closing the flap, and the pressing device 3 is used for limiting the transverse movement of the sliding device 2. When the sliding device 2 transversely moves to the rightmost side of the opening hole 11, the pressing device 3 is pressed below the sliding device 2, the sliding device 2 does not exceed the side surface of the lock seat 1, namely the sliding device pushes away from an airplane opening frame, and at the moment, the opening cover lock is in an unlocking state, so that the opening cover is opened; when the sliding device 2 transversely moves to the leftmost side of the opening hole 11, the pressing device 2 is bounced and fixed in the opening hole 11, the pressing device 3 limits the transverse movement of the sliding device 2 in the opening hole 11, the sliding device 2 protrudes out of the side face of the lock base 1, namely the sliding device 2 is pushed into the lower portion of the airplane mouth frame, and at the moment, the mouth cover lock is in a locking state, so that the closing of the mouth cover is realized.
According to the covering cap locking structure, the sliding device 2 and the pressing device 3 are combined, the sliding device 2 is transversely moved to the leftmost side of the opening hole 11 and pushed into the lower portion of the opening frame of the airplane, the pressing device 3 is introduced to limit the movement of the sliding device 2, and the covering cap is locked; the pressing device 3 is pressed down, the sliding device 2 transversely moves to the rightmost side of the opening hole 11 to push away from the airplane mouth frame, and the pressing device 3 is pressed below the sliding device 2 to open the mouth cover. The flap lock structure in this application, easy operation, simple to operate effectively solve in the current flap lock button lock structure complicated, assembly efficiency slow and the short technical problem of live time.
In the present application, the sliding device 2 is used for opening and closing the flap, and the sliding device 2 is laterally moved in the opening. Further, in an embodiment of the present application, a specific structure of the sliding device 2 is shown in fig. 2, 3 and 5. Fig. 2 is an assembly schematic view of a sliding device of a door lock structure according to an embodiment of the present disclosure, fig. 3 is a sectional view of fig. a-a, and fig. 5 is an exploded schematic view of the door lock structure according to the embodiment of the present disclosure. As shown in fig. 2, 3 and 5, the sliding device 2 includes a sliding rail 21 and a locking tongue 22, and the sliding rail 21 is fixed on the lower surface of the lock base 1; the locking bolt 22 slides in the slide rail 21, one end of the locking bolt 22 is fixed in the slide rail 21, and the other end of the locking bolt 22 is arranged in the opening 11. The locking tongue 22 slides in the slide rail 21, so that the locking tongue can transversely move in the opening hole 11, and the opening and closing of the cover by the sliding device 2 are further realized.
Further, in an embodiment of the present application, the locking tongue 22 is of a "+" type, and includes a bottom 221 and an end 222, wherein the bottom 221 moves laterally within the slide rail 21, and the end 222 moves laterally within the opening 11. The end portion 222 is driven to move transversely in the opening 11 by the sliding of the bottom portion 221 in the slide rail 21, and the end portion 222 is fixed in the opening 11.
Furthermore, the middle of the lock tongue 22 is provided with a groove 223, which not only can reduce the friction resistance between the lock tongue 22 and the lock base 1 during sliding, but also provides a gap for the end 222, thereby facilitating finger operation.
It should be noted that the structure of the sliding device 2 in the present application is not limited thereto, as long as the sliding device 2 can move laterally in the opening 11 and can open and close the flap. The locking tongue 22 may be of a 'Ji' type or other shapes, and the present application is not limited specifically.
In one embodiment of the present application, the outer surface of the end portion 222 is flush with the upper surface of the lock base 11, so that the upper surface of the lock base 1 is flat and smooth as a whole, and is more suitable for modeling design. It should be noted that, the outer surface of the end portion 222 may also protrude from the upper surface of the lock base 11, and whether the outer surface of the end portion 222 is flush with the upper surface of the lock base 1 is not particularly limited.
In the present application, the pressing device 3 moves vertically up and down in the opening 11 for limiting the lateral movement of the sliding device 2 in the opening 11. Further, in an embodiment of the present application, a specific structure of the pressing device 3 is shown in fig. 4. Fig. 4 is an assembly schematic view of the pressing device 3 of the flap lock structure according to the embodiment of the present application. As shown in fig. 4, the pressing device 3 includes a box 31, a spring 32, a base 33 and a top block 34, the box 31 is hollow, and the spring 32 is fixed inside the box 31; one end of the top block 34 is fixed at the upper end of the spring 32, and the other end of the top block vertically moves up and down in the opening 11 under the action of the spring 32; the box body 31 is fixed on the base 33, and the base 33 is fixed on the lower surface of the lock seat 1.
Furthermore, in an embodiment of the present application, the top block 34 is of a "convex" shape, and includes a base 341 and a protrusion 342, the base 341 and the protrusion 342 are integrally formed, the base 341 is connected to the spring 32, and the protrusion 342 moves vertically up and down in the opening 11 under the action of the spring 32; in an unlocking state, the end part 222 transversely moves to the rightmost side of the opening hole 11, the protrusion 342 is pressed below the bottom part 221, the bottom part 221 does not exceed the side surface of the lock base 1, the lock bolt 22 is pushed away from an airplane opening frame, and the opening cover is opened; in the locked state, the end portion 222 moves transversely to the leftmost side of the opening 11, the protrusion 342 is bounced and fixed in the opening 11, the opening 11 is filled with the protrusion 342 and the end portion 222, the protrusion 342 limits the transverse movement of the end portion 222 in the opening 11, that is, in the locked state, the end portion 222 cannot move, and the bottom protrudes out of the side surface of the lock seat, that is, the lock tongue 22 is pushed into the lower portion of the aircraft opening frame, so that the opening cover is closed.
It should be noted that the structure of the pressing device 3 in the present application is not limited to this, as long as the pressing device 3 can vertically move up and down in the opening 11 for limiting the lateral movement of the sliding device 2 in the opening 11. The top block 34 may be not only a "convex" type, but also other shapes, and the present application is not limited in particular.
In an embodiment of the application, in the locking state, the outer surface of the protrusion 342 is flush with the upper surface of the lock base 11, so that the upper surface of the lock base 1 is a plane, and the whole is smooth and more suitable for modeling design. It should be noted that, in the locking state, the outer surface of the protrusion 342 may also protrude from the upper surface of the lock base 11, and whether the outer surface of the protrusion 342 is flush with the upper surface of the lock base 1 is not particularly limited.
Fig. 5 is an exploded schematic structural diagram of a flap lock structure according to an embodiment of the present application. As shown in fig. 5, the flap lock structure provided in the embodiment of the present application includes a lock base 1, an upper surface of the lock base 1 is a plane, and an opening 11 is formed in the lock base 1. The lower surface of the lock base 1 is provided with a sliding rail 21, a bolt 22, a box body 31, a spring 32, a base 33 and a top block 34, one end of the bolt 22 is fixed in the opening 11, the other end of the bolt is arranged in the sliding rail 21, and the sliding rail 21 is fixed on the lower surface of the lock base 1. The base 33 is fixed on the lower surface of the lock seat 1, and the box body 31 is fixed on the base 33; the box body 31 is hollow, one end of the spring 32 is arranged in the box body 31, the other end of the spring is connected with the top block 34, and the top block 34 vertically moves up and down in the opening hole 11 under the action of the spring 32.
Fig. 6 is a schematic locking state diagram of a flap lock structure according to an embodiment of the present application. Fig. 7 is a schematic view of an unlocking state of a flap lock structure according to an embodiment of the present application. As shown in fig. 6, when the flap lock is locked, the locking tongue 22 moves transversely to the leftmost side of the opening hole 11, the top block 34 is fixed in the opening hole 11 in a sprung manner, the opening hole 11 is full of the top block 34 and the locking tongue 22, and the top block 34 limits the transverse movement of the locking tongue 22 in the opening hole 11, that is, in a locked state, the locking tongue 22 cannot move and is pushed into the lower portion of the aircraft opening frame, so that the flap is closed. As shown in fig. 7, when the door is locked and unlocked, the locking tongue 22 moves laterally to the rightmost side of the opening 11, the top block 34 presses below the locking tongue 22, the bottom 221 does not exceed the side of the lock base 1, that is, the locking tongue 22 pushes away from the aircraft frame, and the door is unlocked.
According to the flap lock structure provided by the embodiment of the application, under the condition that the flap is opened, the lock tongue 22 is in a retraction state, namely, the lock tongue 22 transversely moves to the rightmost side of the opening, and at the moment, the top block 34 is compressed below the lock tongue 22. If the covering cap needs to be locked, the locking bolt 22 is pushed leftwards and pushed into the lower part of the opening frame of the airplane, at the moment, under the action of the spring 32, the top block 34 is automatically ejected out to just fill the gap of the opening hole 11, and the locking bolt cannot move in the opening hole 11, so that the locking of the covering cap is realized. If the flap needs to be opened, the top block 34 is pressed down and the locking tongue 32 is pulled back.
The installation steps of a hatch cover lock structure that this application embodiment provided are as follows:
the first step is as follows: after one end of the bolt 22 is aligned with the notch of the opening 11, the other end of the bolt is inserted into the slide rail 21, and the slide rail 21 and the bolt 22 are combined and riveted on the lock base 1;
the second step is that: one end of a spring 32 is arranged at the bottom of the box body 31, the other end of the spring is connected with the top block 34, and the box body 31 is assembled with the base 6 through welding or gluing, as shown in fig. 3.
The third step: after the top block 34 is aligned with the notch of the opening 11, the base 33 is riveted on the lock seat 1.
The application also provides an embodiment of the flap device, which comprises a body and the flap lock structure.
It should be noted that, in this specification, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in when used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are intended to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include elements inherent in the list. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In addition, parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of corresponding technical solutions in the prior art, are not described in detail so as to avoid redundant description.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. The flap lock structure is characterized by comprising a lock base, wherein the upper surface of the lock base is a plane, and the lower surface of the lock base is provided with a sliding device and a pressing device; the lock seat is provided with an opening, the sliding device moves transversely in the opening, and the pressing device moves vertically in the opening; when the sliding device transversely moves to the rightmost side of the opening, the pressing device is pressed below the sliding device, the sliding device does not exceed the side surface of the lock seat, and the opening cover lock is in an unlocking state; when the sliding device transversely moves to the leftmost side of the opening, the pressing device bounces and is fixed in the opening, the pressing device limits the transverse movement of the sliding device in the opening, the sliding device protrudes out of the side face of the lock base, and the flap lock is in a locking state at the moment.
2. The flap lock structure as claimed in claim 1, wherein the sliding means comprises a slide rail and a latch tongue, the slide rail being fixed to a lower surface of the lock housing; the spring bolt slides in the slide rail, spring bolt one end is fixed in the slide rail, the other end sets up in the trompil.
3. The flap lock structure as claimed in claim 1 or 2, wherein the pressing means comprises a box body, a spring, a base and a top block, the box body is hollow, and the spring is fixed inside the box body; one end of the top block is fixed at the upper end of the spring, and the other end of the top block vertically moves up and down in the open hole under the action of the spring; the box body is fixed on the base, and the base is fixed on the lower surface of the lock seat.
4. The flap lock structure of claim 3, wherein the locking tongue is of the "+" type and includes a base portion and an end portion, the base portion laterally moving within the slide track, the end portion laterally moving within the opening.
5. The flap lock structure as claimed in claim 4, wherein the top block is "convex" and includes a base and a protrusion, the base and the protrusion are integrally formed, the base is connected to the spring, and the protrusion moves vertically up and down in the opening under the action of the spring; when the lock is unlocked, the end part transversely moves to the rightmost side of the opening, the protrusion is pressed below the bottom part, and the bottom part does not exceed the side surface of the lock seat; when the lock is in a locking state, the end part moves transversely to the leftmost side of the opening, the protrusion is fixed in the opening in a bouncing manner, the opening is full of the protrusion and the end part, the protrusion limits the transverse movement of the end part in the opening, and the bottom part protrudes out of the side face of the lock seat.
6. The flap lock structure as recited in claim 4, wherein the outer surface of the end portion is flush with the upper surface of the lock housing.
7. The flap lock structure of claim 5, wherein in the locked state, the outer surface of the projection is flush with the upper surface of the lock housing.
8. The flap lock structure as recited in claim 4, wherein a groove is formed in the middle of the latch tongue.
9. A flap device comprising the flap lock structure according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011452511.9A CN112357051B (en) | 2020-12-12 | 2020-12-12 | Flap lock structure and flap device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011452511.9A CN112357051B (en) | 2020-12-12 | 2020-12-12 | Flap lock structure and flap device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112357051A true CN112357051A (en) | 2021-02-12 |
| CN112357051B CN112357051B (en) | 2022-10-11 |
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|---|---|---|---|
| CN202011452511.9A Active CN112357051B (en) | 2020-12-12 | 2020-12-12 | Flap lock structure and flap device |
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| CN112357051B (en) | 2022-10-11 |
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