A manual locking and unlocking device and equipment suitable for narrow space

Abstract

The application discloses a manual locking and unlocking device and equipment suitable for narrow space, and the manual locking and unlocking device comprises a lock sleeve, a lock rod and an elastic driving part. The lock sleeve comprises a sleeve body and a fixing plate extending radially and outwardly from the outer wall of the sleeve body, and at least one hook arm extending in the axial direction is arranged on the side of the fixing plate away from the first fixing part, and a hook part is arranged at the end of the hook arm; the lock rod is rotatable and axially movable and is arranged in the sleeve body of the lock sleeve, a cross beam vertically penetrating the rod body of the lock rod is fixedly arranged on the lock rod, and handles for manual operation are arranged at the two ends of the cross beam respectively; the end of the lock rod away from the handle is configured as a lock head for cooperating with a lock hole on the second fixing part; and the elastic driving part acts on the lock rod and is used for applying a pre-tightening force with an extending tendency to the lock rod. The manual locking and unlocking device has the advantages of high reliability, compact structure, ingenious principle and strong environmental adaptability, and can be locked and unlocked through pure manual and double-finger operation in an extremely narrow space.

Description

Technical Field

[0001] This application relates to the field of mechanical lock technology, and in particular to a manual unlocking and unlocking device and equipment suitable for confined spaces. Background Technology

[0002] In fields such as precision instruments, aerospace, and automation equipment, there is often a need for two relatively rotatable components (such as turntables, hatches, and control surfaces) to be reliably locked in specific positions and quickly unlocked when needed. Such requirements place extremely high demands on the reliability, environmental adaptability, and structural compactness of locking devices.

[0003] Currently, the mainstream technical solutions for achieving this function are mainly divided into two categories: electromagnetic locks and complex mechanical locks.

[0004] Electromagnetic locks use electromagnetic force generated by electricity to drive a locking pin to lock and unlock. While they operate quickly, they have inherent drawbacks: First, they are unstable in harsh environments such as strong vibration, high and low temperatures, vacuum, or strong electromagnetic interference, which can easily lead to malfunctions. Second, they rely on an additional power supply and control circuit, which not only increases the complexity, weight, and cost of the system but also introduces additional points of failure. They completely fail in the absence of power, raising questions about their reliability.

[0005] While complex mechanical locks (such as those employing multi-component transmission systems like linkages, cams, and racks and pinions) do not rely on electricity, they generally suffer from the following drawbacks: their complex structure and numerous parts result in significant size and weight, making them difficult to install in confined environments with extremely limited axial and radial space (such as between two turntables with a gap of less than 20mm); furthermore, disassembly and maintenance are inconvenient, requiring considerable operating force and hindering convenient one-handed manual operation. Particularly noteworthy is that in some special applications, the axial clearance between two relatively rotating fixed components is strictly limited to within 20mm, resulting in extremely cramped operating space, barely accommodating two fingers of the operator. Under such extreme conditions, existing electromagnetic locks and complex mechanical locks fail to meet the requirements due to excessive size, inconvenient operation, or poor environmental adaptability.

[0006] Therefore, there is an urgent need in the field for an unlocking and disengaging device that is extremely compact, purely manually operated, highly reliable, and specifically designed for extremely confined spaces, in order to solve the technical problems that existing technologies cannot overcome. Summary of the Invention

[0007] This application provides a manual locking / unlocking device and equipment suitable for confined spaces, which can solve the technical problem that existing electromagnetic locks and complex mechanical locks cannot achieve locking / unlocking due to excessive size, inconvenient operation, or poor environmental adaptability. The technical solution is as follows:

[0008] On one hand, a manual locking and unlocking device suitable for confined spaces is provided for locking a first fixed member and a second fixed member that can rotate relative to each other, comprising: a locking sleeve and a locking rod. The locking sleeve is fixedly connected to the first fixed member and includes a sleeve body and a fixing plate extending radially outward from the outer wall of the sleeve body. The fixing plate has at least one axially extending hook arm on the side opposite to the first fixed member. The locking rod is rotatably and axially movable through the sleeve body of the locking sleeve. A crossbeam perpendicularly penetrating the rod is fixedly provided on the locking rod, and handles for manual operation are provided at both ends of the crossbeam. The end of the locking rod away from the handle is configured as a lock head for engaging with a lock hole on the second fixed member. An elastic driving member acts on the locking rod to apply force to give the lock head an axis. A pre-tightening force is applied towards the extending tendency of the locking arm; wherein, the end of the hook arm is provided with a hook, the opening of which faces the circumferential rotation path of the locking bar, for engaging the crossbeam in the unlocked state; the locking bar has a locked state and an unlocked state that can be switched by manual operation of the handle: in the locked state, the crossbeam and the hook are misaligned circumferentially, and the lock head extends and inserts into the lock hole of the second fixing member under the action of the pre-tightening force; in the unlocked state, the crossbeam is engaged with the hook, the lock head exits the lock hole of the second fixing member, and the pre-tightening force presses the crossbeam against the hook to maintain the unlocked state.

[0009] Optionally, a lock cap is fixed to the end of the lock sleeve; a lock shaft sleeve is fitted onto the body of the lock rod, and the lock rod and the lock shaft sleeve are connected by a threaded pair; the elastic drive element is a spring, and the spring is compressed between the lock cap and the lock shaft sleeve.

[0010] Optionally, the bottom surface of the crossbeam is a plane; the hook at the end of the hook arm is perpendicular to the hook arm to form a plane contact with the bottom of the crossbeam.

[0011] Optionally, the number of hook arms is two, and they are arranged symmetrically about the axis of the locking sleeve.

[0012] Optionally, the lock head is a conical guide head.

[0013] Optionally, a sealing groove is provided on the inner wall of the axial cavity of the sleeve body, and an O-ring is provided in the sealing groove to form a sliding seal with the outer peripheral surface of the locking rod.

[0014] Optionally, the fixing plate of the lock sleeve is provided with a connecting through hole.

[0015] Optionally, the sleeve body of the lock sleeve is configured to be partially embedded within the first fastener.

[0016] Optionally, the free end of the hook is provided with an anti-slip protrusion extending toward the fixing plate, and the crossbeam is provided with a recess for accommodating the anti-slip protrusion.

[0017] The beneficial effects of the technical solution in this application include at least the following:

[0018] A manual locking / unlocking device suitable for confined spaces includes a lock sleeve, a locking bar, and a resilient drive component. The lock sleeve is fixedly connected to a first fixing component and includes a sleeve body and a fixing plate extending radially outward from the outer wall of the sleeve body. At least one axially extending hook arm is provided on the side of the fixing plate opposite to the first fixing component, with a hook portion at the end of the hook arm. The locking bar is rotatably and axially movable through the sleeve body of the lock sleeve. A crossbeam perpendicularly penetrating the bar is fixedly provided on the locking bar, with handles for manual operation at both ends. The end of the locking bar away from the handles is configured as a lock head for engaging with a lock hole on a second fixing component. The resilient drive component acts on the locking bar to apply a preload force that causes the lock head to extend axially. In the locked state, the crossbeam and hook portion are misaligned circumferentially, and the lock head automatically extends and inserts into the lock hole under the preload force. The entire process is smooth and reliable, achieving a secure connection between the two fixing components. In the unlocked state, a combined manual operation of axial lifting followed by circumferential rotation causes the crossbeam to finally engage with the hook, and the lock head subsequently exits the lock hole. At this point, the preload force, originally used for locking, is converted into a force maintaining the unlocked state, stably pressing the crossbeam against the hook. This application's manual locking and unlocking device achieves highly reliable locking and unlocking in extremely confined spaces through purely manual, two-finger operation. It features a compact structure, ingenious principle, and extremely strong environmental adaptability.

[0019] On the other hand, a device is provided, comprising a first fixing member and a second fixing member that are rotatable relative to each other, characterized in that the device is equipped with at least one of the above-mentioned manual locking and unlocking devices, the locking sleeve is fixed to the first fixing member, and the second fixing member is correspondingly provided with the lock hole.

[0020] The beneficial effects of a device are similar to those of the manual unlocking and unlocking device suitable for confined spaces, and will not be elaborated upon here.

[0021] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional schematic diagram of the unlocked state of a manual unlocking device suitable for confined spaces, provided in an embodiment of this application.

[0024] Figure 2 This is a three-dimensional schematic diagram of the locked state of a manual unlocking / unlocking device suitable for confined spaces, provided in an embodiment of this application.

[0025] Figure 3 yes Figure 1 A frontal sectional view;

[0026] Figure 4 This is a three-dimensional schematic diagram of the unlocked state of a manual locking / unlocking device suitable for confined spaces, provided in an embodiment of this application.

[0027] Figure 5 This is a three-dimensional schematic diagram of the locked state of a manual unlocking / unlocking device suitable for confined spaces, provided in an embodiment of this application;

[0028] Explanation of reference numerals in the attached figures

[0029] 1-Lock sleeve; 101-Lock body; 102-Fixing plate; 103-Hook arm; 104-Hook part; 105-Anti-detachment protrusion; 2-Lock rod; 201-Crossbeam; 202-Handle; 203-Dent; 3-Lock cap; 4-Lock shaft sleeve; 5-Spring; 6-O-ring seal. Detailed Implementation

[0030] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0031] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the relative positions of the corresponding components in the direction of gravity when they are in use, and "inner" and "outer" refer to their relative positions to the contours of the corresponding components themselves. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements.

[0032] According to the embodiments of this application, refer to Figures 1 to 3 A manual locking and unlocking device suitable for confined spaces, used to lock a first fixed member and a second fixed member that can rotate relative to each other, including a locking sleeve 1, a locking rod 2 and an elastic drive member.

[0033] The locking sleeve 1 is fixedly connected to the first fixing member and includes a sleeve body 101 and a fixing plate 102 extending radially outward from the outer wall of the sleeve body 101. The fixing plate 102 has at least one axially extending hook arm 103 on the side opposite to the first fixing member. The locking rod 2 is rotatably and axially movable through the sleeve body 101 of the locking sleeve 1. A crossbeam 201 is fixedly provided on the locking rod 2, which is perpendicular to its rod body. The two ends of the crossbeam 201 are respectively provided with handles 202 for manual operation. The end of the locking rod 2 away from the handles 202 is configured as a lock head for cooperating with the lock hole on the second fixing member. An elastic driving member acts on the locking rod 2 to apply a preload force to it, which makes the lock head tend to extend axially.

[0034] The hook arm 103 has a hook portion 104 at its end, with the opening of the hook portion 104 facing the circumferential rotation path of the locking rod 2, for engaging the crossbeam 201 in the unlocked state. The locking rod 2 has a locked state and an unlocked state that can be switched by manually operating the handle 202: In the locked state, the crossbeam 201 and the hook portion 104 are misaligned circumferentially, and the lock head extends and inserts into the lock hole of the second fixing member under the action of the pre-tightening force. In the unlocked state, the crossbeam 201 is engaged with the hook portion 104, the lock head exits the lock hole of the second fixing member, and the pre-tightening force presses the crossbeam 201 onto the hook portion 104 to maintain the unlocked state.

[0035] The locking lever 2 is designed to be rotatably and axially movable as it passes through the locking sleeve 1, forming the basis for state switching. The design of the two handles 202 allows the operator to easily grip and operate them with their thumb and forefinger, while the crossbeam 201 acts as a load-bearing frame, effectively transmitting the operating force of the fingers to the entire locking lever 2. The other end of the locking lever 2 is constructed as a lock head for engaging with a lock hole on the second fixing member; this is the actuating end for achieving the locking function.

[0036] The elastic drive applies a preload force to the locking rod 2, causing the locking head to tend to extend axially. It achieves two crucial functions: first, in the locked state, it automatically and reliably pushes the locking head into the keyhole, ensuring a secure lock without requiring additional manual tightening force; second, in the unlocked state, it firmly presses the crossbeam 201 against the hook 104, providing a stable holding force to prevent the device from accidentally locking due to vibration or other reasons.

[0037] All these structural features work together to define two stable states of the locking rod 2. In the locked state, the crossbeam 201 and the hook 104 are misaligned circumferentially, and the lock head automatically extends and inserts into the lock hole under the preload. The entire process is smooth and reliable, achieving a firm connection between the two fasteners. In the unlocked state, through a combined manual operation of first axially lifting and then circumferentially rotating, the crossbeam 201 is finally hooked onto the hook 104, and the lock head then exits the lock hole. At this time, the preload, which was originally used for locking, is cleverly transformed into a force to maintain the unlocked state, stably pressing the crossbeam 201 onto the hook 104. This "force reuse" design, which uses the same elastic source to achieve both locking and unlocking retention, fully demonstrates the ingenuity and non-obviousness of the invention.

[0038] The manual locking and unlocking device of this application achieves highly reliable locking and unlocking that can be completed manually with two fingers in extremely confined spaces. It has a compact structure, ingenious principle, and strong environmental adaptability.

[0039] According to the embodiments of this application, refer to Figure 3 The end of the lock sleeve 1 is fixed with a lock cap 3; the body of the lock rod 2 is fitted with a lock shaft sleeve 4, and the lock rod 2 and the lock shaft sleeve 4 are connected by a threaded pair; the elastic driving component is a spring 5, and the spring 5 is compressed between the lock cap 3 and the lock shaft sleeve 4.

[0040] The fixed connection between the lock cap 3 and the lock sleeve 1 forms a closed precision cavity that guides the movement of the lock rod 2. This is of great significance for preventing dust and impurities from entering in harsh environments and ensuring the long-term reliable operation of the mechanism.

[0041] The elastic drive component is a spring 5, which is compressed between the lock cap 3 and the lock shaft sleeve 4. The elastic drive component can be a spring 5, which is compressed between the two lock caps 3 and the lock shaft sleeve 4, forming a complete and efficient closed-loop force chain. When the device is in the locked state, the preload of the spring 5 is transmitted to the entire lock rod 2 through the lock shaft sleeve 4 and the threaded joint, ultimately acting on the lock head to press it firmly into the lock hole with a constant force, ensuring the connection's stability. When the device is operated to the unlocked state, the force of the spring 5 is converted into a retaining force that presses the crossbeam 201 against the hook 104. This "one force for two purposes" design maximizes the use of elastic potential energy, enabling the entire device to achieve bidirectional stable holding without any external power, which is the core of its high reliability.

[0042] The elastic drive element can also be an elastic rubber column. This rubber column can be pre-compressed and disposed between the lock cap 3 and the lock shaft sleeve 4, which can also provide a preload force that tends to extend the lock head.

[0043] According to an embodiment of this application, the bottom surface of the crossbeam 201 is a plane; the hook portion 104 at the end of the hook arm 103 is perpendicular to the hook arm 103 to form a planar contact with the bottom of the crossbeam 201.

[0044] In the unlocked state, the bottom surface of the crossbeam 201 is the main bearing surface of the entire device, bearing the preload of the spring 5. If this bottom surface is curved or has an irregular shape, the contact with the hook 104 will be an unstable point or line contact. Under long-term load and vibration, this contact form will lead to a sharp increase in contact stress, easily causing plastic deformation or wear, thereby changing the fit relationship, reducing the holding force, and even creating gaps that cause abnormal noise. A precision-machined flat surface can provide the maximum contact area. When the preload of the spring 5 acts perpendicularly to this surface, the pressure is evenly distributed, and the pressure per unit area is greatly reduced, thereby effectively avoiding crushing wear of the material and ensuring dimensional stability and functional reliability under long-term use.

[0045] This surface contact relationship has several advantages: First, it provides posture stability, preventing the crossbeam 201 from rolling or tilting on the hook 104, ensuring the linearity and stability of force transmission. Second, compared to point contact, surface contact can withstand much larger loads without permanent deformation, which is crucial for devices subjected to long-term static loads and instantaneous impact loads.

[0046] The flat bottom surface of the horizontal beam 201 requires an equally flat supporting surface to realize its advantages, and the flat surface provided by the vertical hook 104 perfectly meets this requirement. Therefore, this technical solution solves the problem of stable maintenance in the unlocked state through a simple structural combination, and its beneficial effects are direct and significant: extremely high vibration resistance reliability, excellent wear resistance, and functional stability over a long life cycle.

[0047] According to the embodiments of this application, refer to Figures 1 to 3 There are two hook arms 103, which are symmetrically arranged about the axis of the locking sleeve 1. In this embodiment, there are two hook arms 103. Although a single hook arm 103 has a simple structure, it has obvious defects: when the crossbeam 201 is attached to a single hook arm 103, the preload of the spring 5 will generate an overturning moment on the locking rod 2, causing the locking rod 2 to tend to tilt to one side. This will not only aggravate the local wear between the locking rod 2 and the inner wall of the locking sleeve 1 and increase the operating friction, but also easily cause the crossbeam 201 to "pry out" from the single hook part 104 and fail when subjected to lateral vibration. Although three or more hook arms 103 can provide more uniform support, they will unnecessarily increase the complexity of the structure, occupy more circumferential space, and require higher manufacturing precision, resulting in low cost-effectiveness. Two hook arms 103 perfectly solve the stability problem of a single hook arm 103, while avoiding the complexity of multiple hook arms 103.

[0048] The two hook arms 103 are arranged symmetrically about the axis of the locking sleeve 1. This symmetrical arrangement means that the two hook arms 103 are precisely positioned 180 degrees relative to each other in space. This arrangement has the following advantages: First, force balance. When the crossbeam 201 is hooked onto the two symmetrical hooks 104, the preload applied by the spring 5 is evenly distributed to the two symmetrical support points. The force on the locking lever 2 is completely symmetrical about its axis, eliminating any form of overturning moment and ensuring that the locking lever 2 is always in the optimal axial movement posture, minimizing frictional resistance and facilitating operation. Second, operational certainty and convenience. The symmetrical arrangement provides a clear and unique unlocking position. When rotating the locking lever 2, the operator can easily rotate the crossbeam 201 to the symmetrical center position between the two hook arms 103 by feel, achieving near-blind operation, which is crucial for operation in confined spaces with poor visibility. Third, improved system redundancy and reliability. The double hook arm 103 design effectively provides a redundant backup. Even if one of the hooks 104 is accidentally damaged in an extreme case, the other symmetrical hook 104 can still take on the hanging function on its own. Although the force is no longer balanced at this time, it can still maintain the basic unlocked state.

[0049] According to the embodiments of this application, refer to Figure 2 The lock head is a conical guide head. The fit between the lock hole and the lock head is a clearance fit, which inevitably involves manufacturing tolerances and accumulated assembly errors. In confined spaces, visual observation is often limited, making precise alignment for insertion impractical. A cylindrical lock head with a slight lateral deviation may have its end face edge strike the edge of the lock hole opening, causing a "jamming" phenomenon. The conical guide head design cleverly utilizes the principle of inclined plane guidance to solve this problem. The diameter of the cone gradually increases from its tip, forming a natural guide slope. When the lock head moves towards the lock hole under the force of the spring, even with a certain centerline deviation, as long as the conical part of the lock head contacts the lock hole opening before its maximum diameter part, the subsequent process becomes an automatic and forced alignment process. This design has the following characteristics: First, it achieves high-tolerance, rapid docking. It allows for a considerable initial position deviation, significantly reducing the stringent requirements for manufacturing and assembly precision, while also making rapid blind operation possible under harsh conditions. Second, it protects the mating surfaces. The smooth, beveled contact replaces direct edge impact, greatly reducing the impact and scratches on the keyhole opening and the lock itself, effectively extending the service life of components. Third, it improves the smoothness of the locking process and the user experience.

[0050] According to the embodiments of this application, refer to Figure 3The inner wall of the axial cavity of the sleeve body 101 is provided with a sealing groove, and an O-ring 6 is provided in the sealing groove to form a sliding seal with the outer peripheral surface of the locking rod 2. In mechanical motion, the sliding pair is most sensitive to the working environment. Once contaminants such as dust, water vapor, and salt spray penetrate the axial cavity inside the locking sleeve 1, they will form abrasives, drastically accelerating the wear of the locking rod 2 and the inner wall of the locking sleeve 1, leading to increased clearance, unstable operating force, and even jamming.

[0051] The O-ring 6 is a standard sealing element with a simple structure and high reliability. It is placed in a special groove on the inner wall of the locking sleeve 1, maintaining an interference fit with the outer surface of the moving locking rod 2, thus establishing an effective dynamic sealing barrier between them. This barrier has a two-way function: firstly, it prevents external contaminants from entering. Regardless of whether the device is locked or unlocked, and regardless of the axial movement of the locking rod 2, the O-ring remains in close contact with the locking rod 2, acting like a movable gate to tightly block dust, moisture, and other contaminants from entering the cavity, ensuring the cleanliness of the internal moving parts. Secondly, it maintains internal lubrication. If grease is pre-applied during assembly, the O-ring 6 effectively retains this lubricant within the cavity, allowing it to function effectively over a long period, further reducing friction and wear.

[0052] To achieve an effective sliding seal without significantly increasing operating force, precise requirements must be placed on the selection of the O-ring 6, the size design of the sealing groove, and the surface finish of the locking rod 2. Low-friction, high-elasticity materials such as nitrile rubber or fluororubber are typically chosen to ensure that while providing sufficient sealing force, the sliding friction is controlled within an acceptable range for manual operation.

[0053] According to the embodiments of this application, refer to Figure 2 The fixing plate 102 of the locking sleeve 1 is provided with a connecting through hole. From a manufacturing perspective, machining through holes in the fixing plate 102 is a simple and low-cost process, which is very suitable for mass production. It is more flexible and maintainable than welding, riveting or other special connection methods.

[0054] According to an embodiment of this application, the sleeve body 101 of the lock sleeve 1 is configured to be partially embedded within the first fixing member. In a conventional installation method, the lock sleeve 1 may protrude completely from the surface of the first fixing member. This directly increases the axial clearance that must be reserved between the two fixing members. In scenarios where the clearance is strictly limited (e.g., 20mm), such protrusion may be unacceptable. The partially embedded design of the sleeve body 101 means that a countersunk hole or stepped hole matching the outer contour of the lock sleeve 1 sleeve body 101 is pre-drilled on the first fixing member, partially burying the lock sleeve 1 inside the base. This embedded installation significantly reduces the overall height. The portion of the lock sleeve 1 protruding from the base surface is essentially only the fixing plate 102 with the hook arm 103. The embedded installation makes the connection between the lock sleeve 1 and the first fixing member tighter, almost integrated. This not only results in a cleaner appearance but also enhances the bending and torsional stiffness of the lock sleeve 1, making it less deformed and more stable in operation when subjected to operating forces.

[0055] To achieve this embedding, the first fastener typically needs to have sufficient thickness or allow for appropriate machining. However, this is feasible and common practice in most precision equipment. This design embodies a shift in thinking from "component design" to "system design," treating the locking / unlocking device no longer as an accessory but as an integral part of the overall structure.

[0056] According to the embodiments of this application, refer to Figure 4 and Figure 5 The free end of the hook 104 is provided with an anti-detachment protrusion 105 extending toward the fixing plate 102, and the crossbeam 201 is provided with a recess 203 for accommodating the anti-detachment protrusion 105.

[0057] Under continuous high-intensity vibration, impact, or inertial force from a specific direction, there is a slight possibility that the dynamic force applied to the crossbeam 201 may momentarily exceed the maximum static friction, or generate a component that causes the crossbeam 201 to move upwards, causing it to "jump" out of the opening of the hook 104, thus causing the device to accidentally enter the locking state, potentially leading to a serious accident. The anti-detachment protrusion is designed to eliminate this slight possibility. Specifically, the bent part acts like a safety barrier for the hook 104. Its presence does not affect normal hooking operations: in the final stage of the unlocking operation, the crossbeam 201, under the action of the spring force, enters the opening of the hook 104 from the side and finally sits on the hook 104's locking surface. However, once in place, this upwardly bent protrusion forms a physical obstacle.

[0058] Secondly, according to an embodiment of this application, a device is provided, including a first fixing member and a second fixing member that are rotatable relative to each other. The device is equipped with at least one manual locking / unlocking device as described above. The lock sleeve 1 is fixed to the first fixing member, and the second fixing member is provided with the corresponding lock hole.

[0059] By fixing the lock sleeve 1 to the first fixing member and providing a corresponding lock hole on the second fixing member, the integrated function is completed. When the device is in the locked state, the lock head is inserted into the lock hole of the second fixing member. Since the lock sleeve 1 is fixed to the first fixing member, the two components are constrained in the circumferential and radial directions, achieving reliable relative fixation. When the device is in the unlocked state, the lock head is disengaged, and the two components resume free rotation.

[0060] The working principle of the manual unlocking device of this application will be explained below with reference to specific embodiments. The first turntable and the second turntable are connected in parallel and can rotate relative to each other.

[0061] The locking sleeve 1 is securely and compactly mounted on the first turntable by means of a connecting through hole on the fixing plate 102 and by partially embedding the sleeve body 101. A corresponding locking hole is machined on the second turntable. The locking sleeve 1 has two centrally symmetrically arranged hook arms 103, with hook portions 104 at the ends of the hook arms 103 perpendicular to the hook arms 103 and forming a plane. The bottom surface of the crossbeam 201 of the locking rod 2 is flat, and the handles 202 at both ends are knurled. The locking rod 2 is connected to a locking shaft sleeve 4 via a threaded pair. A set of springs 5 ​​is compressed between the locking shaft sleeve 4 and the locking cap 3 fixed by a set screw, providing preload. A sliding seal is achieved between the locking rod 2 and the locking sleeve 1 by an O-ring seal 6.

[0062] The initial state is the unlocked state: At this time, the crossbeam 201 is hooked onto the plane of the two hooks 104, and the preload of the spring 5 presses the crossbeam 201 down firmly to stabilize the state. The lock head is completely disengaged from the lock hole of the second turntable, and the two turntables can rotate freely relative to each other.

[0063] The unlocking and locking process: The operator pinches the two knurled handles 202 with their thumb and forefinger. First, overcoming the pressure of the spring 5, the operator gently lifts the locking lever 2 a short distance axially towards the first turntable, disengaging the crossbeam 201 from the hook 104. Then, while maintaining the lift, the operator rotates the locking lever 2 approximately 90 degrees circumferentially, positioning the crossbeam 201 in a position corresponding to the notch between the two hook arms 103. At this point, releasing the fingers causes the locking lever 2 to spring out rapidly axially under the strong preload of the spring 5. The conical lock head at its front end automatically guides and precisely inserts into the lock hole of the second turntable. Now, the crossbeam 201 is positioned below the hook 104 and circumferentially offset from it, the device is locked, and the two turntables are securely locked, preventing relative rotation.

[0064] The locking and unlocking process: The operator pinches handle 202 again with two fingers, overcoming the force of spring 5 to lift the locking bar 2 axially, causing the conical lock head to disengage from the lock hole of the second turntable. Next, while in the lifted state, the locking bar 2 is rotated approximately 90 degrees circumferentially, causing the crossbeam 201 to rotate directly below the hook 104 until the crossbeam 201 abuts against the hook arm 103. Then, the operator slowly releases their fingers, allowing the locking bar 2 to descend slowly under the force of spring 5 until the bottom surface of the crossbeam 201 rests stably on the locking plane of the hook 104. The device then returns to a stable unlocked state.

[0065] As can be seen from the above process, the present invention transforms the simple manual operation of "pinching, lifting, turning, leaning, and releasing" into a reliable locking and unlocking state switching through a series of ingenious mechanical interactions, perfectly meeting the usage needs in extremely confined spaces.

[0066] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0067] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0068] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A manual locking / unlocking device suitable for confined spaces, used to lock a first fixing member and a second fixing member that can rotate relative to each other, characterized in that, include: A locking sleeve (1) is fixedly connected to the first fixing member. The locking sleeve (1) includes a sleeve body (101) and a fixing plate (102) extending radially outward from the outer wall of the sleeve body (101). The fixing plate (102) has at least one axially extending hook arm (103) on the side opposite to the first fixing member. A locking rod (2) is rotatably and axially movable through the sleeve body (101) of the locking sleeve (1). A crossbeam (201) is fixedly provided on the locking rod (2) and perpendicularly penetrates its body. Handles (202) for manual operation are provided at both ends of the crossbeam (201). The end of the locking rod (2) away from the handle (202) is configured as a lock head for engaging with a lock hole on the second fixing member. An elastic drive member acts on the locking rod (2) to apply force to it. The lock head has a pre-tightening force with an axial extension tendency; wherein, the end of the hook arm (103) is provided with a hook (104), the opening of the hook (104) facing the circumferential rotation path of the lock bar (2), for hooking the crossbeam (201) in the unlocked state; the lock bar (2) has a locked state and an unlocked state that can be switched by manually operating the handle (202): in the locked state, the crossbeam (201) and the hook (104) are misaligned in the circumferential direction, and the lock head extends and inserts into the lock hole of the second fixing member under the action of the pre-tightening force; in the unlocked state, the crossbeam (201) is abutted against the hook (104), the lock head exits the lock hole of the second fixing member, and the pre-tightening force presses the crossbeam (201) onto the hook (104) to maintain the unlocked state.

2. The manual unlocking / unlocking device according to claim 1, characterized in that, The end of the lock sleeve (1) is fixed with a lock cap (3); the body of the lock rod (2) is fitted with a lock shaft sleeve (4), and the lock rod (2) and the lock shaft sleeve (4) are connected by a threaded pair; the elastic drive component is a spring (5), and the spring (5) is compressed between the lock cap (3) and the lock shaft sleeve (4).

3. The manual unlocking / unlocking device according to claim 1, characterized in that, The bottom surface of the crossbeam (201) is a plane; the hook (104) at the end of the hook arm (103) is perpendicular to the hook arm (103) to form a plane contact with the bottom of the crossbeam (201).

4. The manual unlocking / unlocking device according to claim 1, characterized in that, The number of hook arms (103) is two, and they are arranged symmetrically about the axis of the lock sleeve (1).

5. The manual unlocking / unlocking device according to claim 1, characterized in that, The lock head is a conical guide head.

6. The manual unlocking / unlocking device according to claim 1, characterized in that, The inner wall of the axial cavity of the sleeve body (101) is provided with a sealing groove, and an O-ring (6) is provided in the sealing groove to form a sliding seal with the outer peripheral surface of the locking rod (2).

7. The manual unlocking / unlocking device according to claim 1, characterized in that, The fixing plate (102) of the lock sleeve (1) is provided with a connecting through hole.

8. The manual unlocking / unlocking device according to claim 7, characterized in that, The sleeve body (101) of the lock sleeve (1) is configured to be partially embedded in the first fastener.

9. The manual unlocking / unlocking device according to claim 1, characterized in that, The free end of the hook (104) is provided with an anti-detachment protrusion (105) extending toward the fixing plate (102), and the crossbeam (201) is provided with a recess (203) for accommodating the anti-detachment protrusion (105).

10. A device comprising a first fixing member and a second fixing member that are rotatable relative to each other, characterized in that, The device is equipped with at least one manual locking / unlocking device as described in any one of claims 1 to 9, the lock sleeve (1) is fixed to the first fixing member, and the second fixing member is provided with the corresponding lock hole.

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