A hatch lock with safety function
By designing an inner decorative cover and handle base, combined with guide brackets and limiting components, the structural complexity and locking failure issues of the cabin door lock of an electric vertical takeoff and landing aircraft have been resolved, achieving a highly stable safety function and improving security.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZERO GRAVITY NANJING AIRCRAFT IND CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-14
AI Technical Summary
The door lock structure of existing electric vertical takeoff and landing aircraft is complex and bulky, which is prone to problems such as the pull cable coming off the hook, causing the lock to fail.
It features an inner decorative cover and handle base design, combined with guide brackets, limit components and gear transmission, and achieves stable control of the locking tongue through a rotating shaft and safety spring, with a safety function to prevent locking failure.
This invention achieves a hatch lock with a simple structure and high stability, improving security and operational stability, and preventing the lock tongue from failing due to factors such as vibration.
Smart Images
Figure CN224496089U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hatch lock technology, specifically a hatch lock with a safety function. Background Technology
[0002] Currently, as a new type of short-to-medium-range air transportation, electric vertical takeoff and landing (EVTOL) aircraft have achieved near-zero emissions while possessing advantages such as high safety, low noise, low manufacturing cost, and low operating cost. Therefore, they have attracted widespread attention from aerospace companies, the automotive industry, the transportation industry, governments, the military, and academia. Furthermore, EVTOL aircraft also feature safety and reliability (no explosions or fuel leaks), simple structure, ease of operation, good maintainability / low cost, and good economic efficiency.
[0003] Chinese utility model patents, with announcement number CN216130699U and application number CN202121163052.2, disclose a hatch lock and an aircraft. The lock utilizes a cable mechanism to drive an actuating element in multiple directions, causing the actuating element to move the lock tongue and thus change the lock's open / closed state. The cable mechanism can be configured with different lengths to allow the inward and outward handles of the aircraft hatch to connect to the lock body from a considerable distance, enabling the hatch to open and close. However, this structure is not only complex and heavy, but also prone to cable detachment, leading to lock failure.
[0004] Therefore, we propose a hatch lock with a safety function to solve the above problems. Utility Model Content
[0005] (a) Technical problems to be solved
[0006] To address the shortcomings of existing technologies, this utility model provides a hatch lock with a safety function, which has the advantages of simple structure, safety function, and high stability during opening and closing. It solves the problems of existing hatch locks being relatively complex, bulky, and prone to lock failure due to pull cord detachment.
[0007] (II) Technical Solution
[0008] To achieve the aforementioned goals of simple structure, safety function, and high stability during opening and closing, this utility model provides the following technical solution: A hatch lock with a safety function includes an inner decorative cover and a handle base. One of the inner decorative cover and the other of the handle base is located inside the hatch, and the other is located outside the hatch. One side of the handle base has an installation cavity, and the other side has a frame handle. Guide brackets are provided on the inner walls of both sides of the installation cavity. A locking tongue is also provided within the guide brackets. The locking tongue slides along the installation direction of the guide brackets to allow it to enter or exit the installation cavity, thereby limiting the locking tongue and preventing it from being locked out of place. The locking tongue has a rack opening inside, with a rack on one side. A gear is also installed inside the mounting cavity, meshing with the rack. An opening is located in the middle of the gear. An inner handle is installed on the inner decorative cover, and a rotating shaft is connected to the inner handle via screws. A square end of the frame is connected to the end of the rotating shaft opposite the inner handle. The rotating shaft passes through the opening and is connected to the frame handle via screws. The frame handle moves axially along the rotating shaft and rotates radially along the rotating shaft, thereby controlling the gear to move the locking tongue.
[0009] As a further explanation of this utility model: the guide bracket is provided with an opening, and the locking tongue is also provided with a limiting groove.
[0010] As a further explanation of this utility model: the mounting cavity is also provided with a first limiting member and a second limiting member. The first limiting member is used to control the movement of the bolt in the vertical direction, and the second limiting member is used to control the movement of the bolt in the horizontal direction. The movement of the bolt in the mounting cavity can be controlled by the first limiting member and the second limiting member. The first limiting member can improve the stability of the bolt, and the second limiting member can reset the bolt under certain conditions.
[0011] As a further explanation of this utility model: the first limiting member includes a limiting spring and a steel ball. The limiting spring is located in the opening on the guide bracket, and the steel ball is located in the limiting groove on the lock tongue. One end of the limiting spring is in contact with the steel ball, and the other end is in contact with the inner wall of the mounting cavity. The steel ball controls the movement of the lock tongue through the elastic force of the limiting spring and the limiting groove.
[0012] As a further explanation of this utility model: the second limiting member includes a return spring, and a return groove is also provided in the mounting cavity. One end of the return spring is located in the limiting groove, and the other end is connected to the locking tongue. The return spring can reset the locking tongue when it is locked.
[0013] As a further explanation of this utility model: the rotating shaft includes a cylindrical end and a square end. The cylindrical end is connected to the frame handle, and the square end is connected to the inner handle. By controlling the position of the cylindrical end and the square end relative to the gear opening, the movement of the locking tongue is controlled by the gear.
[0014] As a further explanation of this utility model: the opening includes a square opening and a circular opening. The size of the square opening is the same as that of the square end, and the size of the circular opening is the same as that of the circular end. By setting it in this way, the cylindrical end and the square end can be matched with appropriate openings.
[0015] As a further explanation of this utility model: a safety spring is also provided inside the square opening. One end of the safety spring is connected to the square end, and the other end is connected to the inner wall of the square opening. By providing the safety spring, the frame handle can be reset after driving the rotating shaft to move, thus achieving the safety function.
[0016] As a further explanation of this utility model: the cross-section of the end of the latch extending out of the mounting cavity is arc-shaped. This design makes it easier for the latch to enter the mounting cavity.
[0017] (III) Beneficial Effects
[0018] Compared with the prior art, this utility model provides a hatch lock with a safety function, which has the following advantages:
[0019] 1. This hatch lock with safety function uses a rotating shaft that is either cylindrical or square. Under the constraint of the safety spring, in the locked state, the cylindrical end of the rotating shaft engages with the gear. At this time, there is no contact between the gear and the cylindrical end, so turning the handle is ineffective, thus achieving the safety function.
[0020] 2. This hatch lock with a safety function, when locked, uses a steel ball to press the bolt due to the force of the limit spring, effectively preventing the bolt from failing to return to its original position due to vibration or other factors, thus improving the stability and security of the lock. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0022] Figure 2 This is a schematic diagram of the structure of the present invention when the locking mechanism is installed;
[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention;
[0024] Figure 4 This is a schematic diagram of the vertical cross-section structure of this utility model.
[0025] In the diagram: 1. Locking tongue; 2. Guide bracket; 3. Limiting spring; 4. Steel ball; 5. Return spring; 6. Gear; 7. Shaft; 8. Safety spring; 9. Inner handle; 10. Inner decorative cover; 11. Handle base; 12. Frame handle. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] Please see Figure 1-4 A hatch lock with a safety function includes an inner decorative cover 10 and a handle base 11. One of the inner decorative cover 10 and the other of the handle base 11 is located inside the hatch, and the other is located outside the hatch. One side of the handle base 11 has a mounting cavity, and the other side has a frame handle 12. Guide brackets 2 are provided on the inner walls of both sides of the mounting cavity. A locking tongue 1 is also provided inside the guide brackets 2. The locking tongue 1 slides along the mounting direction of the guide brackets 2 to allow the locking tongue 1 to enter or exit the mounting cavity, thereby limiting the locking tongue 1 and preventing it from shaking within the mounting cavity. A safety feature is provided inside the locking tongue 1. The rack opening has a rack on one side, and a gear 6 is also installed in the mounting cavity. The gear 6 meshes with the rack for transmission. The gear 6 has an opening in the middle. An inner handle 9 is installed on the inner decorative cover 10. The inner handle 9 is connected to a rotating shaft 7 by screws. The end of the rotating shaft 7 opposite to the inner handle 9 is connected to a square end of the skeleton. The rotating shaft 7 passes through the opening and is connected to the skeleton handle 12 by screws through the square end of the skeleton. The skeleton handle 12 moves along the axial direction of the rotating shaft 7 and rotates along the radial direction of the rotating shaft 7, so that the skeleton handle 12 drives the rotating shaft 7 to move, thereby controlling the gear 6 to drive the locking tongue 1 to move.
[0028] The mounting cavity is also equipped with a first limiting member and a second limiting member. The first limiting member controls the vertical movement of the latch 1, and the second limiting member controls the horizontal movement of the latch 1. The first and second limiting members control the movement of the latch 1 within the mounting cavity. The first limiting member improves the stability of the latch 1, and the second limiting member resets the latch 1 under certain conditions. The first limiting member includes a limiting spring 3 and a steel ball 4. An opening is provided on the guide bracket 2, and the limiting spring 3 is located in the opening. A limiting groove is also provided on the latch 1, and the steel ball 4 is located in the limiting groove. One end of the limiting spring 3 contacts the steel ball 4, and the other end contacts the inner wall of the mounting cavity. The steel ball 4 controls the movement of the latch 1 through the elastic force of the limiting spring 3 and the limiting groove. The second limiting member includes a return spring 5. A return groove is also provided in the mounting cavity. One end of the return spring 5 is located in the limiting groove, and the other end is connected to the latch. The return spring 5 resets the latch 1 when it is locked.
[0029] The rotating shaft 7 includes a cylindrical end and a square end. The cylindrical end is connected to the frame handle 12, and the square end is connected to the inner handle 9. By controlling the position of the cylindrical end and the square end relative to the opening of the gear 6, the movement of the locking tongue 1 is controlled by the gear 6. The opening includes a square opening and a circular opening. The size of the square opening is the same as that of the square end, and the size of the circular opening is the same as that of the circular end. This setting allows the cylindrical end and the square end to match the appropriate opening.
[0030] A safety spring 8 is also installed inside the square opening. One end of the safety spring 8 is connected to the square end, and the other end is connected to the inner wall of the square opening. By installing the safety spring 8, the frame handle 12 can drive the rotating shaft 7 to move and then reset it, thus achieving the safety function.
[0031] The end of the latch 1 that extends out of the mounting cavity has an arc-shaped cross section. This design makes it easier for the latch 1 to enter the mounting cavity.
[0032] Initial state as Figure 3 The diagram shows the locked state. During rotation, the frame handle 12 needs to be pulled outwards, causing the square end of the rotating shaft 7 to be pulled into the square opening of the gear 6. Rotating the frame handle 12 at this time will drive the gear 6, which in turn drives the locking tongue 1 through the rack to press the return spring 5. When the locking tongue 1 retracts into the mounting cavity, the locked state is released. Then, the frame handle 12 is released, and the locking tongue 1 pops out of the mounting cavity under the elastic force of the return spring 5, achieving the locked state again. During use, because the rotating shaft 7 is cylindrical and square, under the restriction of the safety spring 8, in the locked state, the cylindrical end of the rotating shaft 7 engages with the gear 6. At this time, there is no contact between the gear 6 and the cylindrical end, so rotating the frame handle 12 is ineffective, thus achieving the safety function. In the locked state, the steel ball 4 will press the locking tongue 1 due to the force of the limiting spring 3, effectively preventing the locking tongue 1 from failing to return to its locked position due to vibration or other factors, thus improving the stability and security of the locking tongue 1.
[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A hatch lock with a safety function, comprising an inner decorative cover (10) and a handle base (11), characterized in that: The handle base (11) has an installation cavity on one side and a skeleton handle (12) on the other side. Guide brackets (2) are provided on the inner walls of both sides of the installation cavity. A locking tongue (1) is also provided inside the guide brackets (2). The locking tongue (1) slides along the installation direction of the guide brackets (2) to allow it to enter or exit the installation cavity. A rack opening is provided inside the locking tongue (1), with a rack on one side. A gear (6) is also provided inside the installation cavity. The gear (6) meshes with the rack for transmission. The gear (6) has a central opening... An opening is provided, and an inner handle (9) is provided on the inner decorative cover (10). The inner handle (9) is connected to a rotating shaft (7) by screws. The end of the rotating shaft (7) opposite to the inner handle (9) is connected to a square end of the skeleton. The rotating shaft (7) passes through the opening of the gear (6) and is connected to the skeleton handle (12) by screws through the square end of the skeleton. The skeleton handle (12) moves along the axial direction of the rotating shaft (7) and rotates along the radial direction of the rotating shaft (7) so that the skeleton handle (12) drives the rotating shaft (7) to move, thereby controlling the gear (6) to drive the locking tongue (1) to move.
2. A hatch lock with a safety function according to claim 1, characterized in that: The guide bracket (2) has an opening, and the locking tongue (1) also has a limit groove.
3. A hatch lock with a safety function according to claim 1, characterized in that: The mounting cavity is also provided with a first limiting member and a second limiting member. The first limiting member is used to control the vertical movement of the locking tongue (1), and the second limiting member is used to control the horizontal movement of the locking tongue (1).
4. A hatch lock with a safety function according to claim 2, characterized in that: The first limiting component includes a limiting spring (3) and a steel ball (4). The limiting spring (3) is located in the opening on the guide bracket (2), and the steel ball (4) is located in the limiting groove on the locking tongue (1). One end of the limiting spring (3) is in contact with the steel ball (4), and the other end is in contact with the inner wall of the mounting cavity.
5. A hatch lock with a safety function according to claim 1, characterized in that: The second limiting component includes a return spring (5), and a return groove is also provided in the mounting cavity. One end of the return spring (5) is located in the limiting groove, and the other end is connected to the locking tongue (1).
6. A hatch lock with a safety function according to claim 1, characterized in that: The rotating shaft (7) includes a cylindrical end and a square end. The cylindrical end is connected to the skeleton handle (12), and the square end is connected to the inner handle (9).
7. A hatch lock with a safety function according to claim 5, characterized in that: The opening includes a square opening and a circular opening. The square opening is the same size as the square end, and the circular opening is the same size as the circular end.
8. A hatch lock with a safety function according to claim 6, characterized in that: A safety spring (8) is also provided inside the square opening. One end of the safety spring (8) is connected to the square end, and the other end is connected to the inner wall of the square opening.
9. A hatch lock with a safety function according to claim 1, characterized in that: The end of the latch (1) that extends out of the mounting cavity has an arc-shaped cross section.