Insurance switch, handle assembly and locking device

Abstract

The application relates to an insurance switch, a handle assembly and a locking device, and belongs to the technical field of cabin door locks. The locking device comprises a lock, an unlocking driving assembly and a handle assembly. The handle assembly comprises a handle disc, a handle shaft, an inner handle, an outer handle, an insurance switch and a reset piece. The insurance switch comprises an insurance piece, a linkage piece, a retaining structure and a limiting structure. The insurance piece is used for indirectly or directly locking with the inner handle to limit the opening action or release the locking. The insurance piece has a locking part. The linkage piece is used for linkage with the inner handle and has a locking part. The insurance piece can move between a closed position and an opened position. The insurance piece further has a first force applying part and a second force applying part. The first force applying part and the second force applying part can release the insurance of the inner handle in the cabin and outside the cabin of the helicopter, and the safety is higher.

Description

Technical Field

[0001] This invention relates to a safety switch, a handle assembly, and a locking device, belonging to the field of hatch lock technology. Background Technology

[0002] The helicopter cockpit door locking system allows the pilot and ground maintenance personnel to open and close the cockpit door from inside and outside the helicopter, respectively. To ensure the safety of the helicopter pilot, the inner handle in the locking system used for opening and closing the helicopter door must be designed to prevent accidental opening.

[0003] Currently, two main methods are used to ensure the internal handle can be opened without accidental operation. One method is a pull-lock design, where the internal handle is locked by inserting and removing a safety pin; the other is a concealed design, where the handle doesn't protrude from the theoretical shape of the cockpit door. However, both methods have drawbacks: the internal handle can only be released from inside the helicopter cabin. Because the internal and external handles in the locking mechanism are linked, if an unexpected situation occurs inside the cabin preventing the internal handle from being released, neither the internal nor external handle can be turned. Therefore, in this situation, the door cannot be unlocked and opened, resulting in low safety.

[0004] Therefore, in order to enable the operator to release the safety of the inner handle from both inside and outside the helicopter cabin, a locking device with a new optimized structure is needed. Summary of the Invention

[0005] The purpose of this invention is to provide a safety switch, handle assembly, and locking device that can disengage the inner handle safety both inside and outside the helicopter cabin.

[0006] This invention provides a safety switch, disposed within a handle assembly, to prevent the helicopter door from being accidentally opened by the pilot when not in operation, by activating the inner handle of the helicopter door. It is characterized by the following features:

[0007] A locking element, used to indirectly or directly engage with the inner handle to restrict its opening action or to unlock it, has a locking part; and

[0008] The linkage component, used for linkage with the inner handle, has a locking engagement part.

[0009] The safety component can move between a closed position and an open position.

[0010] When in the closed position, the locking part and the locking engagement part cooperate to form a locking engagement.

[0011] When in the open position, the locking part disengages from the locking engagement part, thus releasing the locking engagement;

[0012] The safety component also has a first force-applying part extending into the helicopter cabin and a second force-applying part extending outward from the helicopter cabin.

[0013] The first force-applying part is used to drive the safety component to move between the closed position and the open position.

[0014] The second force-applying part is at least used to drive the safety element from the closed position to the open position.

[0015] The safety switch provided by this invention may also have the following features:

[0016] The linkage component rotates synchronously with the inner handle.

[0017] The outer wall of the safety component has a blocking portion and a clearance portion arranged sequentially along its own moving direction. The clearance portion is recessed inward relative to the blocking portion, and the blocking portion constitutes the locking portion.

[0018] The circumferential edge of the linkage has a blocking engagement portion that matches the blocking portion, and the blocking engagement portion constitutes the locking engagement portion;

[0019] One of the blocking portion and the blocking mating portion is a convex portion, and the other is a concave portion that matches the convex portion;

[0020] When in the closed position, the blocking engagement portion on the linkage corresponds to the blocking portion on the safety component, and the two cooperate to form a blockage on the rotation path of the linkage.

[0021] When in the open position, the blocking engagement part on the linkage corresponds to the avoidance part, and the obstruction on the rotation path of the linkage is removed.

[0022] The safety switch provided by this invention may also have the following features, including:

[0023] A retaining structure is used to hold the safety element in the closed or open position.

[0024] The retaining structure includes an elastic telescopic member and two abutment recesses;

[0025] The elastic telescopic member is disposed inside the safety member, and the two abutting recesses are disposed on the circumferential outer side of the safety member; or, the elastic telescopic member is disposed on the circumferential outer side of the safety member, and the two abutting recesses are disposed on the circumferential surface of the safety member.

[0026] The elastic telescopic member has a telescopic protrusion, which is partially spherical or spherical, and the abutting recess matches the telescopic protrusion;

[0027] When the safety element moves to the closed position, the telescopic protrusion extends into one of the abutment recesses to form an abutment engagement.

[0028] When the safety component moves to the open position, the telescopic protrusion extends into another abutting recess to form an abutting engagement.

[0029] The safety switch provided by this invention may also have the following features, including:

[0030] A limiting structure is used to limit the movement distance of the safety component.

[0031] The limiting structure includes:

[0032] A limiting groove is disposed within the safety element and extends along the moving direction of the safety element; and

[0033] The limiting rod moves into the limiting groove in a direction perpendicular to the direction of movement of the safety component.

[0034] When the limiting rod abuts against one end of the limiting groove in the extending direction, the safety component is in the closed position.

[0035] When the limiting rod abuts against the other end of the limiting groove in the extension direction, the safety component is in the open position.

[0036] This invention provides a handle assembly disposed within a locking device for operating and unlocking the locking device, characterized by comprising:

[0037] Handle plate;

[0038] A handle shaft rotatably passes through the handle disc, with one end extending into the helicopter cabin and the other end extending out of the helicopter cabin.

[0039] An inner handle is fixedly installed at one end of the handle shaft that extends into the helicopter cabin.

[0040] An external handle, fixedly mounted at one end of the handle shaft extending outside the helicopter cabin; and

[0041] Safety switch

[0042] The safety switch is the safety switch described above.

[0043] The linkage component is fixedly mounted on the handle shaft.

[0044] The handle assembly provided by this invention may also have the following features:

[0045] The safety component is rod-shaped and movably passes through the handle, with one end extending into the helicopter cabin to form the first force-applying part and the other end extending into the helicopter cabin to form the second force-applying part. The axial direction of the safety component is its direction of movement.

[0046] The handle assembly provided by this invention may also have the following features:

[0047] The linkage component has a swing end, which provides power for unlocking.

[0048] When the inner handle or the outer handle rotates in the unlocking direction under the action of an external force, the linkage rotates synchronously in the unlocking direction.

[0049] The handle assembly provided by this invention may also include the following features:

[0050] A reset component, disposed on the handle plate, is used to drive the linkage component to rotate and reset in the opposite direction of the unlocking direction after the external force on the inner handle or the outer handle is removed.

[0051] This invention provides a locking device, characterized by comprising:

[0052] A lock is installed on the hatch and its frame, and includes at least a lock base assembly and a lock box assembly. The lock base assembly includes at least a lock pin, and the lock box assembly includes at least a lock box body and a lock hook. When locked, the lock pin and the lock hook engage.

[0053] An unlocking drive assembly, connected to the lock hook drive, is used to drive the lock hook to rotate and disengage from the lock pin, thereby unlocking the lock; and

[0054] A handle assembly is used to operate the unlocking drive assembly to unlock the lock.

[0055] The handle assembly is the handle assembly described above.

[0056] The locking device provided by the present invention may also have the following features:

[0057] The unlocking driver component includes:

[0058] The sleeve component has one end fixedly supported by the handle disc and the other end fixedly supported by the lock box body; and

[0059] A flexible rod is movably inserted inside the sleeve, with one end extending from one end of the sleeve and drivenly connected to the locking hook, and the other end extending from the other end of the sleeve and connected to the swing end of the linkage.

[0060] When the linkage rotates along the unlocking direction, the flexible rod pulls the lock hook to rotate, causing it to disengage from the lock pin.

[0061] Therefore, the present invention has the following advantages compared with the prior art:

[0062] According to the present invention, the safety switch, handle assembly, and locking device include a lock, an unlocking drive assembly, and a handle assembly. The handle assembly includes a handle disc, a handle shaft, an inner handle, an outer handle, a safety switch, and a reset member. The safety switch includes a safety element, a linkage element, a retaining structure, and a limiting structure. The safety element has a locking portion, the linkage element has a locking engagement portion, and the safety element also has a first force-applying portion and a second force-applying portion. When it is necessary to engage the safety on the inner handle, the operator can operate the first force-applying portion from inside the helicopter cabin to move the safety element from the open position to the closed position. The locking part and the locking engagement part cooperate to form a locking engagement, so that the linkage is locked by the safety element, thereby locking the inner handle. At this time, the inner handle cannot be operated to unlock the cabin door. When it is necessary to release the safety of the inner handle, the operator can operate the first force application part inside the helicopter cabin or operate the second force application part outside the helicopter cabin to drive the safety element from the closed position to the open position. When it is in the open position, the locking part and the locking engagement part disengage to release the locking engagement. At this time, the inner handle can be operated to unlock the cabin door. This allows the operator to release the safety of the inner handle from both inside and outside the helicopter cabin, which has a higher level of safety. Attached Figure Description

[0063] Figure 1 This is a three-dimensional structural diagram of the locking device in an embodiment of the present invention;

[0064] Figure 2 This is a three-dimensional structural diagram of the handle assembly in the first direction in an embodiment of the present invention;

[0065] Figure 3 This is a three-dimensional structural diagram of the handle assembly in the second direction in an embodiment of the present invention;

[0066] Figure 4 This is a partial three-dimensional structural diagram of the handle assembly in an embodiment of the present invention;

[0067] Figure 5 This is a schematic diagram of the mating structure of the safety component and the linkage component in an embodiment of the present invention;

[0068] Figure 6This is a three-dimensional structural diagram of the safety component in an embodiment of the present invention;

[0069] Figure 7 This is a schematic diagram of the structure of the safety component in its closed position according to an embodiment of the present invention;

[0070] Figure 8 This is a schematic diagram of the structure of the safety component in its open position according to an embodiment of the present invention;

[0071] Figure 9 This is a schematic diagram of the retaining structure and the limiting structure in an embodiment of the present invention;

[0072] Figure 10 This is a three-dimensional structural diagram of the lock in an embodiment of the present invention;

[0073] Figure 11 This is a three-dimensional structural diagram of the lock in its locked state according to an embodiment of the present invention;

[0074] Figure 12 This is a three-dimensional structural diagram of the unlocking drive component in an embodiment of the present invention;

[0075] Figure 13 This is a three-dimensional structural schematic diagram of the locking indicator component in an embodiment of the present invention;

[0076] Figure 14 This is a partial three-dimensional structural schematic diagram of the locking indicator component in an embodiment of the present invention;

[0077] Figure 15 This is a schematic diagram of the cooperation structure between the locking indicator component and the lock box component in an embodiment of the present invention.

[0078] The markings in the attached drawings are described as follows: Locking device 100; Lock 1; Lock seat assembly 11; Lock pin 111; Lock seat body 112; Lock box assembly 12; Lock box body 121; Lock hook 122; Drive unit 122a; Stop mechanism 123; Fastening mechanism 124; Locking indicator assembly 13; Base 131; Cover 132; Observation port 132a; Rotation space 133; Indicator 134; First indicator 134a; Second indicator 134b; Drive rod 135; Reset member 136; Support shaft 137; Unlocking drive assembly 2; Sleeve 21; Flexible rod 22; Handle assembly 3; Handle disc 31; Through hole 311; Handle Hand shaft 32; inner handle 33; outer handle 34; safety switch 35; safety element 351; locking part 351a; first force application part 351b; blocking part 351c; clearance part 351d; mounting hole 351e; linkage element 352; locking mating part 352a; second force application part 352b; blocking mating part 352c; swing end 352d; retaining structure 353; elastic telescopic element 353a; abutting recess 353b; telescopic protrusion 353c; steel ball 353d; force application spring 353e; limiting structure 354; limiting groove 354a; limiting rod 354b; reset element 36; slide rod 361; reset spring 362. Detailed Implementation

[0079] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following describes the safety switch, handle assembly and locking device of the present invention in detail with reference to the embodiments and accompanying drawings.

[0080] This embodiment provides a safety switch, handle assembly, and locking device that can disengage the inner handle safety both inside and outside the helicopter cabin.

[0081] Figure 1 This is a three-dimensional structural diagram of the locking device in an embodiment of the present invention.

[0082] like Figure 1 As shown, the locking device 100 of this embodiment includes a lock 1, an unlocking drive assembly 2, and a handle assembly 3. The lock 1 is mounted on the hatch and its frame. The unlocking drive assembly 2 is used to unlock the lock 1. The handle assembly 3 is used to operate the unlocking drive assembly 2 to unlock the lock 1.

[0083] Figure 2 This is a three-dimensional structural diagram of the handle assembly in the first direction in an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the handle assembly in the second direction in an embodiment of the present invention.

[0084] like Figure 2 and Figure 3As shown, the handle assembly 3 includes a handle disc 31, a handle shaft 32, an inner handle 33, an outer handle 34, a safety switch 35, and a reset member 36. The safety switch 35 is used to prevent the helicopter door from being accidentally opened by the pilot when not in operation, by activating the inner handle 33.

[0085] Figure 4 This is a partial three-dimensional structural diagram of the handle assembly in an embodiment of the present invention; Figure 5 This is a schematic diagram of the cooperation structure between the safety component and the linkage component in an embodiment of the present invention.

[0086] like Figure 4 and Figure 5 As shown, the safety switch 35 includes a safety element 351 and a linkage element 352. The safety element 351 is used to indirectly or directly lock into the inner handle 33 to restrict its opening action or to unlock it, and it has a locking part 351a. The linkage element 352 is used to link with the inner handle 33 and it has a locking engagement part 352a. The safety element 351 can move between a closed position and an open position. When it is in the closed position, the locking part 351a and the locking engagement part 352a cooperate to form a locking engagement; when it is in the open position, the locking part 351a and the locking engagement part 352a disengage to unlock it. The safety element 351 also has a first force-applying part 351b extending to one side inside the helicopter cabin and a second force-applying part 352b extending to one side outside the helicopter cabin. The first force-applying part 351b is used to drive the safety element 351 to move between the closed position and the open position, and the second force-applying part 352b is at least used to drive the safety element 351 to move from the closed position to the open position.

[0087] Understandably, when it is necessary to lock the inner handle 33, the operator can operate the first force-applying part 351b inside the helicopter cabin to move the safety element 351 from the open position to the closed position. When in this position, the locking part 351a and the locking engagement part 352a cooperate to form a locking engagement, so that the linkage 352 is locked by the safety element 351, thereby locking the inner handle 33. At this time, the inner handle 33 cannot be operated to unlock the cabin door. When it is necessary to unlock the inner handle 33, the operator can operate the first force-applying part 351b inside the helicopter cabin or operate the second force-applying part 352b outside the helicopter cabin to move the safety element 351 from the closed position to the open position. When in this position, the locking part 351a and the locking engagement part 352a disengage to unlock the door. At this time, the inner handle 33 can be operated to unlock the cabin door. This allows the operator to unlock the inner handle 33 from both inside and outside the helicopter cabin, providing higher safety.

[0088] Figure 6 This is a three-dimensional structural diagram of the safety component in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the safety component in its closed position according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the safety component in its open position according to an embodiment of the present invention.

[0089] like Figures 5 to 8 As shown, the linkage 352 rotates synchronously with the inner handle 33. The outer wall of the safety element 351 has a blocking portion 351c and a clearance portion 351d arranged sequentially along its own moving direction. The clearance portion 351d is recessed inward relative to the blocking portion 351c. The blocking portion 351c constitutes a locking portion 351a. The circumferential edge of the linkage 352 has a blocking engagement portion 352c that matches the blocking portion 351c, and the blocking engagement portion 352c constitutes a locking engagement portion 352a. One of the blocking portion 351c and the blocking engagement portion 352c is a protrusion, and the other is a recess that matches the protrusion. When in the closed position, the blocking engagement portion 352c on the linkage 352 corresponds to the blocking portion 351c on the safety element 351, and the two cooperate to form a blockage on the rotation path of the linkage 352. When in the open position, the blocking engagement portion 352c on the linkage 352 corresponds to the clearance portion 351d, and the blockage on the rotation path of the linkage 352 is removed.

[0090] Understandably, when the safety element 351 moves to the closed position, the blocking part 351c on the safety element 351 moves to a position corresponding to the blocking engagement part 352c on the linkage 352. The two engage to form a block on the rotation path of the linkage 352, thereby preventing the linkage 352 from rotating, and consequently preventing the inner handle 33 from rotating. When the safety element 351 moves to the open position, the clearance part 351d on the safety element 351 moves to a position corresponding to the blocking engagement part 352c on the linkage 352. At this time, the block on the rotation path of the linkage 352 is removed, thereby allowing the linkage 352 and the inner handle 33 to rotate.

[0091] In this embodiment, the blocking portion 351c is a convex portion, and the blocking mating portion 352c is a concave portion. The safety member 351 is cylindrical, and a portion of the circumferential surface of the safety member 351 is radially recessed to form an annular groove. This annular groove constitutes the clearance portion 351d. The axial width of the annular groove is greater than the thickness of the circumferential edge of the linkage member. A portion of the circumferential surface of the safety member 351 located axially adjacent to the annular groove constitutes the blocking portion 351c. The blocking mating portion 352c is an arc-shaped groove that matches the circumferential surface of the safety member 351. When the safety member 351 is in the closed position, the blocking portion 351c extends into the blocking mating portion 352c and engages with it. At this time, the safety member 351 forms a block on the rotation path of the linkage member 352. When the safety member 351 is in the open position, the clearance portion 351d aligns with the blocking mating portion 352c. At this time, the linkage member 352 can rotate at a certain angle, which is greater than the angle required for the linkage member 352 to perform the unlocking action.

[0092] In other alternative embodiments, the blocking part 351c may be a concave part and the blocking mating part 352c may be a convex part.

[0093] Figure 9 This is a schematic diagram of the retaining structure and the limiting structure in an embodiment of the present invention.

[0094] like Figure 9 As shown, the safety switch 35 of this embodiment also includes a retaining structure 353, which is used to hold the safety element 351 in the closed or open position. The retaining structure 353 includes an elastic telescopic member 353a and two abutment recesses 353b. The elastic telescopic member 353a is disposed inside the safety element 351, and the two abutment recesses 353b are disposed on the circumferential outer side of the safety element 351. The elastic telescopic member 353a has a telescopic protrusion 353c, which is partially spherical or spherical, and the abutment recesses 353b match the telescopic protrusion 353c. When the safety element 351 moves to the closed position, the telescopic protrusion 353c extends into one of the abutment recesses 353b to form an abutment engagement; when the safety element 351 moves to the open position, the telescopic protrusion 353c extends into the other abutment recess 353b to form an abutment engagement.

[0095] Understandably, when the safety element 351 moves to the closed or open position, the telescopic protrusion 353c can extend into the corresponding abutment recess 353b to form an abutment engagement, thereby locking the safety element 351 to prevent abnormal movement. This allows the safety element 351 to be stably maintained in the closed or open position, while also preventing the safety element 351 from shifting due to personnel contact or vibration during flight. In addition, under the action of external force, the telescopic protrusion 353c can quickly disengage from the abutment recess 353b, and the required external force is small. This means that when changing positions, the operator only needs to apply force to rotate the safety element 351 to disengage the telescopic protrusion 353c from the abutment recess 353b, facilitating the position switching of the safety element 351.

[0096] In other alternative embodiments, the elastic telescopic member 353a is disposed on the circumferential outer side of the safety member 351, and two abutting recesses 353b are disposed on the circumferential surface of the safety member 351.

[0097] like Figure 4As shown, the safety element 351 is rod-shaped and movably passes through the handle 31. One end extends into the helicopter cabin to form a first force-applying part 351b, and the other end extends out of the helicopter cabin to form a second force-applying part 352b. The axial direction of the safety element 351 is its direction of movement. Understandably, the operator can apply force to the first force-applying part 351b inside the helicopter cabin to move the safety element 351 along its axial direction, thereby moving the safety element 351 between a closed position and an open position. Simultaneously, the operator can apply force to the second force-applying part 352b outside the helicopter cabin to move the safety element 351 along its axial direction, thereby moving the safety element 351 from the closed position to the open position.

[0098] In this embodiment, when the safety element 351 is in the closed position, the end of the safety element 351 that constitutes the second force-applying part 352b protrudes a certain distance relative to the surface of the handle 31 facing outward. This distance is greater than the distance required for the safety element 351 to move from the current position to the open position. When the difference between the two is small, the second force-applying part 352b can only drive the safety element 351 to move from the closed position to the open position to a certain extent. When the difference is large, the second force-applying part 352b can drive the safety element 351 to move between the closed position and the open position. Therefore, the distance of this protrusion can be adjusted according to actual needs.

[0099] like Figure 6 and Figure 9 As shown, the elastic telescopic member 353a includes a steel ball 353d and a force-applying spring 353e. The steel ball 353d forms a telescopic protrusion 353c. The safety member 351 has a mounting hole 351e extending radially therein, which is open towards one end of the abutment recess 353b. Both the force-applying spring 353e and the steel ball 353d are placed inside the mounting hole 351e. One end of the force-applying spring 353e abuts against the bottom of the mounting hole 351e, and the other end abuts against the steel ball 353d. The surface of the steel ball 353d abuts against the inner wall of one of the abutment recesses 353b. The handle plate 31 has a through hole 311 through which the safety member 351 passes. Two abutment recesses 353b are provided on the inner wall of the through hole 311 and are spaced apart along the moving direction of the safety member 351. The distance between the two abutment recesses 353b corresponds to the distance between the closed position and the open position. In this embodiment, the abutment recess 353b is a circular hole that extends radially along and communicates with the through hole 311. In other alternative embodiments, the abutment recess 353b may also be a partially spherical groove that matches the surface of the steel ball.

[0100] like Figure 9As shown, the safety switch 35 in this embodiment also includes a limiting structure 354, which limits the movement distance of the safety element 351. The limiting structure 354 includes a limiting groove 354a and a limiting rod 354b. The limiting groove 354a is disposed within the safety element 351 and extends along the movement direction of the safety element 351. The limiting rod 354b moves into the limiting groove 354a in a direction perpendicular to the movement direction of the safety element 351. When the limiting rod 354b abuts against one end of the extending direction of the limiting groove 354a, the safety element 351 is in the closed position; when the limiting rod 354b abuts against the other end of the extending direction of the limiting groove 354a, the safety element 351 is in the open position.

[0101] Understandably, when the safety element 351 moves between the closed position and the open position, the movement distance of the safety element 351 can be limited by the cooperation between the limiting groove 354a and the limiting rod 354b. When the limiting rod 354b abuts against one end of the extending direction of the limiting groove 354a, the safety element 351 moves to the closed position. When the limiting rod 354b abuts against the other end of the extending direction of the limiting groove 354a, the safety element 351 moves to the open position. This allows the safety element 351 to move accurately to the closed position or the open position, facilitating the switching of the position of the safety element 351.

[0102] In this embodiment, the limiting rod 354b is radially inserted into the through hole 311, with both ends of the limiting rod 354b embedded in the inner wall of the through hole 311. The limiting groove 354a is an open-end, waist-shaped hole structure that extends axially along the safety element 351. The length of the limiting groove 354a corresponds to the distance between the closed and open positions. The external dimensions of the limiting rod 354b match the internal dimensions of the limiting groove 354a. Specifically, the outer wall of the limiting rod 354b and the inner wall of the limiting groove 354a are in sliding fit, which not only limits the distance the safety element 351 can move, but also prevents the safety element 351 from rotating around its own axis due to misoperation.

[0103] like Figure 2 As shown, the handle shaft 32 rotatably passes through the handle plate 31, with one end extending into the helicopter cabin and the other end extending outwards. An inner handle 33 is fixedly mounted on the end of the handle shaft 32 extending into the helicopter cabin. An outer handle 34 is fixedly mounted on the end of the handle shaft 32 extending outwards. A linkage 352 is fixedly mounted on the handle shaft 32. Understandably, when the safety element 351 is in the closed position, the linkage 352 is locked, thereby locking the handle shaft 32, at which point neither the inner handle 33 nor the outer handle 34 can rotate.

[0104] like Figure 3As shown, the linkage 352 has a swing end 352d, which provides power for unlocking. When the inner handle 33 or the outer handle 34 rotates in the unlocking direction under the action of an external force, the linkage 352 rotates synchronously in the unlocking direction. It can be understood that when the operator applies force to the inner handle 33 or the outer handle 34 to make it rotate in the unlocking direction, it can drive the linkage 352 to rotate synchronously in the unlocking direction, thereby providing power for unlocking. Figure 4 The direction indicated by A in the middle is the unlocking direction.

[0105] like Figure 3 As shown, the reset member 36 is disposed on the handle plate 31, and is used to drive the linkage member 352 to rotate and reset in the opposite direction of the unlocking direction after the external force on the inner handle 33 or the outer handle 34 is removed. It can be understood that when the external force on the inner handle 33 or the outer handle 34 is removed, the linkage member 352 is driven to rotate and reset in the opposite direction of the unlocking direction under the action of the reset member 36, thereby causing the inner handle 33 and the outer handle 34 to rotate and reset synchronously in the opposite direction of the unlocking direction.

[0106] like Figure 3 As shown, the reset component 36 includes a slide rod 361 and a reset spring 362. One end of the slide rod 361 forms a sliding support with the handle plate 31, and the other end is hinged to the swing end 352d of the linkage component 352. The reset spring 362 is sleeved on the slide rod 361, with one end abutting against a protrusion on its own surface and the other end abutting against the handle plate 31. Understandably, when the linkage component 352 rotates in the unlocking direction, it drives the slide rod 361 to move synchronously, causing the reset spring 362 to be compressed and store force.

[0107] Figure 10 This is a three-dimensional structural diagram of the lock in an embodiment of the present invention; Figure 11 This is a three-dimensional structural diagram of the lock in its locked state according to an embodiment of the present invention.

[0108] like Figure 10 and Figure 11 As shown, the lock 1 includes at least a lock base assembly 11 and a lock box assembly 12. The lock base assembly 11 includes at least a lock pin 111 and a lock base body 112. The lock box assembly 12 includes at least a lock box body 121 and a lock hook 122. When locked, the lock pin 111 and the lock hook 122 engage.

[0109] In this embodiment, the lock seat assembly 11 is used to be installed on the door frame of the hatch, and the lock box assembly 12 is used to be installed on the hatch and is positioned opposite to the lock seat assembly 11. The lock pin 111 is fixedly installed on the lock seat body 112 at one end facing the lock box body 121, and the lock hook 122 is rotatably installed inside the lock box body 121. When the lock hook 122 rotates, it engages with or disengages from the lock pin 111.

[0110] In this embodiment, the lock box assembly 12 further includes a stop mechanism 123 and a fastening mechanism 124. The structure of the stop mechanism 123 and the fastening mechanism 124 is consistent with the structure of the stop mechanism and the fastening mechanism disclosed in Chinese Utility Model Patent 201721339229.3, so it will not be described in detail here.

[0111] In this embodiment, there are two locks 1, and there are also two corresponding unlocking drive components 2 and swing ends 352d. The two swing ends 352d are respectively driven to the lock hooks 122 in the corresponding locks 1 through the corresponding unlocking drive components 2.

[0112] Figure 12 This is a three-dimensional structural diagram of the unlocking drive component in an embodiment of the present invention.

[0113] like Figure 12 As shown, the unlocking drive assembly 2 is driven to the lock hook 122, and is used to drive the lock hook 122 to rotate and disengage from the lock pin 111, thereby unlocking the lock 1. The unlocking drive assembly 2 includes a sleeve 21 and a flexible rod 22. One end of the sleeve 21 forms a fixed support with the handle plate 31, and the other end forms a fixed support with the lock box body 121. The flexible rod 22 is movably inserted into the sleeve 21, with one end extending from one end of the sleeve 21 and driven to the lock hook 122, and the other end extending from the other end of the sleeve 21 and connected to the swing end 352d of the linkage 352. When the linkage 352 rotates in the unlocking direction, the flexible rod 22 pulls the lock hook 122 to rotate, causing it to disengage from the lock pin 111. In this embodiment, the flexible rod 22 is a steel wire rope.

[0114] Figure 13 This is a three-dimensional structural schematic diagram of the locking indicator component in an embodiment of the present invention; Figure 14 This is a partial three-dimensional structural diagram of the locking indicator component in an embodiment of the present invention.

[0115] like Figure 13 and Figure 14As shown, one of the locks 1 also includes a locking indicator assembly 13, which is disposed on the hatch and opposite to the lock box assembly 12, for indicating whether the lock 1 is locked in place. The locking indicator assembly 13 includes a base 131, a cover 132, an indicator 134, a drive rod 135, and a reset member 136. The base 131 is used to connect to the hatch. The cover 132 is disposed on the base 131 and forms a rotation space 133 therewith, and the cover 132 has an observation port 132a communicating between the inside and outside of the rotation space 133. The indicator 134 is indirectly or directly rotatably supported on the base 131 and located within the rotation space 133, and the indicator 134 has a first indicator part 134a and a second indicator part 134b. One end of the driving lever 135 is drivenly connected to the locking hook 122, and the other end is connected to the indicator 134, for driving the indicator 134 to rotate from a first position corresponding to the first indicator part 134a and the observation port 132a to a second position corresponding to the second indicator part 134b and the observation port 132a. The reset member 136 is used to drive the indicator 134 from the second position to the first position after the driving force of the locking hook 122 is removed.

[0116] Understandably, when the locking hook 122 rotates in the locking direction, it drives the indicator 134 to rotate from the first position to the second position via the driving rod 135. When the indicator 134 is in the second position, the locking hook 122 engages with the locking pin 111, and the hatch lock 1 is locked in place. When the locking hook 122 rotates in the unlocking direction, the indicator 134 rotates from the second position to the first position under the action of the reset member 136. This allows the operator to determine whether the hatch lock 1 is locked in place by observing the indicator through the observation port 132a. When the second indicator 134b is observed through the observation port 132a, it indicates that the hatch lock 1 has been locked in place, thereby improving the safety of use.

[0117] In this embodiment, the first indicator 134a and the second indicator 134b are easily distinguishable, and the difference may be in color, shape, or markings. For example, in this embodiment, the outer surface of the first indicator 134a has a red coating, and the outer surface of the second indicator 134b has a green coating. In other alternative embodiments, the first indicator 134a has a specific shape, and the second indicator 134b has a shape different from that of the first indicator 134a.

[0118] In this embodiment, the cover 132 is a hemispherical shell, which is fixedly mounted on the base 131 and its opening is closed by the base 131. The indicator 134 is a spherical shape that matches the inner wall of the cover 132. The first indicator part 134a and the second indicator part 134b are arranged sequentially along the rotation direction of the indicator 134.

[0119] like Figure 14As shown, the locking indicator assembly 13 also includes a support shaft 137, which is fixedly supported on the base 131, and the indicator 134 is rotatably supported on the support shaft 137. The reset member 136 is a torsion spring, which is sleeved on the support shaft 137, with one end abutting against the side wall in the rotation direction of the indicator 134, and the other end abutting against the surface of the base 131.

[0120] Understandably, when the locking hook 122 rotates in the locking direction, the reset member 136 compresses and stores force. Therefore, when the locking hook 122 rotates in the unlocking direction, the reset member 136 can drive the indicator 134 to rotate and reset from the second position to the first position.

[0121] Figure 15 This is a schematic diagram of the cooperation structure between the locking indicator component and the lock box component in an embodiment of the present invention.

[0122] like Figure 15 As shown, a portion of the circumferential surface of the lock hook 122 constitutes the drive unit 122a. The drive rod 135 slides through the base 131, with one end sliding into the rotation space 133 and fixedly connected to the indicator 134, and the other end sliding into the lock box assembly 12 and abutting against the drive unit 122a.

[0123] In this embodiment, the driving part 122a is curved, and the driving rod 135 passes vertically through the base 131, with one end being hemispherical. This end abuts against the driving part 122a, so that when the locking hook 122 rotates in the locking direction, the driving part 121a can drive the driving rod 135 to move towards the inside of the rotation space 133. Simultaneously, when the locking hook 122 rotates in the unlocking direction, the driving rod 122a will not interfere with the rotation of the locking hook 122. Figure 15 The direction indicated by B is the locking direction, and the opposite direction is the unlocking direction.

[0124] The role and effect of the embodiments

[0125] According to the safety switch, handle assembly, and locking device involved in this embodiment, the locking device includes a lock, an unlocking drive assembly, and a handle assembly. The handle assembly includes a handle disc, a handle shaft, an inner handle, an outer handle, a safety switch, and a reset component. The safety switch includes a safety element, a linkage element, a retaining structure, and a limiting structure. The safety element has a locking part, the linkage element has a locking engagement part, and the safety element also has a first force-applying part and a second force-applying part. When it is necessary to engage the safety on the inner handle, the operator can operate the first force-applying part from inside the helicopter cabin to move the safety element from the open position to the closed position. The locking part and the locking engagement part cooperate to form a locking engagement, so that the linkage is locked by the safety element, thereby locking the inner handle. At this time, the inner handle cannot be operated to unlock the cabin door. When it is necessary to release the safety of the inner handle, the operator can operate the first force application part inside the helicopter cabin or operate the second force application part outside the helicopter cabin to drive the safety element from the closed position to the open position. When it is in the open position, the locking part and the locking engagement part disengage to release the locking engagement. At this time, the inner handle can be operated to unlock the cabin door. This allows the operator to release the safety of the inner handle from both inside and outside the helicopter cabin, which has a higher level of safety.

[0126] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A safety switch, disposed within a handle assembly, for preventing the helicopter door from being accidentally opened by the pilot when not in operation, characterized in that, include: A locking element (351), used for indirectly or directly locking with the inner handle (33) to restrict its opening action or to release the locking engagement, has a locking part (351a); and Linkage component (352), used for linkage with the inner handle (33), has a locking engagement part (352a). The safety component (351) is movable between a closed position and an open position. When in the closed position, the locking part (351a) and the locking engagement part (352a) cooperate to form a locking engagement. When in the open position, the locking part (351a) disengages from the locking engagement part (352a) and releases the locking engagement. The safety component (351) also has a first force-applying part (351b) extending into one side of the helicopter cabin and a second force-applying part (352b) extending into one side of the helicopter cabin. The first force-applying part (351b) is used to drive the safety element (351) to move between the closed position and the open position. The second force-applying part (352b) is at least used to drive the safety element (351) from the closed position to the open position; The linkage (352) rotates synchronously with the inner handle (33). The outer wall of the safety element (351) has a blocking portion (351c) and a clearance portion (351d) arranged sequentially along its own moving direction. The clearance portion (351d) is recessed inward relative to the blocking portion (351c), and the blocking portion (351c) constitutes the locking portion (351a). The circumferential edge of the linkage (352) has a blocking engagement portion (352c) that matches the blocking portion (351c), and the blocking engagement portion (352c) constitutes the locking engagement portion (352a). One of the blocking portion (351c) and the blocking mating portion (352c) is a convex portion, and the other is a concave portion that matches the convex portion; When in the closed position, the blocking engagement portion (352c) on the linkage (352) corresponds to the blocking portion (351c) on the safety member (351), and the two cooperate to form a block on the rotation path of the linkage (352). When in the open position, the blocking engagement part (352c) on the linkage (352) corresponds to the avoidance part (351d), and the obstruction on the rotation path of the linkage (352) is removed.

2. The safety switch according to claim 1, characterized in that, Also includes: A retaining structure (353) is used to hold the safety element (351) in the closed position or the open position. The retaining structure (353) includes an elastic telescopic member (353a) and two abutment recesses (353b); The elastic telescopic member (353a) is disposed inside the safety member (351), and the two abutting recesses (353b) are disposed on the circumferential outer side of the safety member (351); or, the elastic telescopic member (353a) is disposed on the circumferential outer side of the safety member (351), and the two abutting recesses (353b) are disposed on the circumferential surface of the safety member (351); The elastic telescopic member (353a) has a telescopic protrusion (353c), which is partially spherical or spherical, and the abutting recess (353b) matches the telescopic protrusion (353c). When the safety element (351) moves to the closed position, the telescopic protrusion (353c) extends into one of the abutment recesses (353b) to form an abutment engagement. When the safety element (351) moves to the open position, the telescopic protrusion (353c) extends into another abutting recess (353b) to form an abutting engagement.

3. The safety switch according to claim 1 or 2, characterized in that, Also includes: A limiting structure (354) is used to limit the movement distance of the safety element (351). The limiting structure (354) includes: A limiting groove (354a) is disposed within the safety element (351) and extends along the moving direction of the safety element (351); and The limiting rod (354b) moves into the limiting groove (354a) in a direction perpendicular to the moving direction of the safety element (351). When the limiting rod (354b) abuts against one end of the extending direction of the limiting groove (354a), the safety element (351) is in the closed position. When the limiting rod (354b) abuts against the other end of the limiting groove (354a) in the extending direction, the safety element (351) is in the open position.

4. A handle assembly disposed within a locking device for operating to unlock the locking device, characterized in that, include: Handle plate (31); A handle shaft (32) rotatably passes through the handle disc (31), with one end extending into the helicopter cabin and the other end extending out of the helicopter cabin. An inner handle (33) is fixedly mounted at one end of the handle shaft (32) extending into the helicopter cabin; An external handle (34) is fixedly mounted at one end of the handle shaft (32) extending outside the helicopter cabin; and Safety switch (35), Wherein, the safety switch (35) is the safety switch according to any one of claims 1-3. The linkage component (352) is fixedly mounted on the handle shaft (32).

5. The handle assembly according to claim 4, characterized in that: in, The safety element (351) is rod-shaped and movably passes through the handle (31). One end extends into the helicopter cabin to form the first force-applying part (351b), and the other end extends out of the helicopter cabin to form the second force-applying part (352b). The axial direction of the safety element (351) is its direction of movement.

6. The handle assembly according to claim 4, characterized in that: in, The linkage (352) has a swing end (352d) for providing power for unlocking. When the inner handle (33) or the outer handle (34) rotates in the unlocking direction under the action of external force, the linkage (352) rotates synchronously in the unlocking direction.

7. The handle assembly according to claim 6, characterized in that, Also includes: A reset member (36) is provided on the handle plate (31) for driving the linkage member (352) to rotate and reset in the opposite direction of the unlocking direction after the external force of the inner handle (33) or the outer handle (34) is removed.

8. A locking device, characterized in that, include: A lock (1) is used to be installed on the hatch and its frame, and includes at least a lock seat assembly (11) and a lock box assembly (12). The lock seat assembly (11) includes at least a lock pin (111), and the lock box assembly (12) includes at least a lock box body (121) and a lock hook (122). When locked, the lock pin (111) and the lock hook (122) are engaged. The unlocking drive assembly (2) is driven to connect with the lock hook (122) and is used to drive the lock hook (122) to rotate and disengage from the lock pin (111), thereby unlocking the lock (1); as well as The handle assembly (3) is used to operate the unlocking drive assembly (2) to unlock the lock (1). The handle assembly (3) is the handle assembly according to any one of claims 4-7.

9. The locking device according to claim 8, Its features are: in, The unlocking driver component (2) includes: The sleeve (21) has one end fixedly supported by the handle plate (31) and the other end fixedly supported by the lock box body (121); as well as A flexible rod (22) is movably inserted into the sleeve (21), with one end extending from one end of the sleeve (21) and drivenly connected to the locking hook (122), and the other end extending from the other end of the sleeve (21) and connected to the swing end (352d) of the linkage (352). When the linkage (352) rotates along the unlocking direction, the soft rod (22) pulls the lock hook (122) to rotate so that it disengages from the lock pin (111).

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