A locking structure and slide rail

Abstract

This invention discloses a locking structure and a slide rail, including a locking unit and an unlocking unit. The locking unit includes a locking component, an elastic element, and a limiting component. The locking component is rotatably connected to a first rail, and each end of the locking component has a locking part. The elastic element is disposed on the locking component and provides it with rotational elastic force. The limiting component is disposed on a second rail, and the limiting component has a through unlocking channel along the sliding direction of the first rail. The locking component is located on one side of the limiting component and is offset from the unlocking channel in the length direction of the first rail. When switching to the locked state, the locking part at the front end abuts against one end of the limiting component and, guided by the first guide part, overcomes the elastic force to drive the locking component to rotate to be opposite the unlocking channel. After the front locking part extends out of the unlocking channel, the two locking parts are respectively located on both sides of the limiting component and cooperate with the two ends of the limiting component to restrict the locking component from moving in the direction of the first active state and the second active state, respectively.

Description

Technical Field

[0001] This invention belongs to the field of slide rail technology, and particularly relates to a locking structure and a slide rail. Background Technology

[0002] In modern industrial production and various equipment applications, slide rails, as a fundamental and crucial mechanical component, play an indispensable role. Due to their sliding function, they are widely used in many scenarios requiring relative sliding of components. For example, in server racks, slide rails provide convenient pull-out operation space for server equipment, facilitating installation, maintenance, and repair by technicians; in drawer designs, slide rails enable smooth opening and closing, improving the ease of use of the furniture; and in various mechanical equipment, slide rails also help components achieve precise sliding displacement, meeting the needs of mechanical movement.

[0003] Regarding server slide rails, the common types are mainly divided into three-section slide rails and two-section slide rails. Three-section slide rails have a relatively complex structure, consisting of an inner rail, a middle rail, and an outer rail, with each part sliding through a specific connection method. Two-section slide rails are relatively simpler, lacking one sliding rail. In terms of the specific connection structure, the inner rail is usually slidably connected to the middle rail via beaded joints, and the middle rail is similarly slidably connected to the outer rail via beaded joints. This beaded joint connection method ensures, to a certain extent, the smoothness of the slide rail's movement.

[0004] However, in actual use, the locking and positioning of the inner rail after it slides out becomes a key factor affecting its performance and user experience. A reliable locking and positioning mechanism is essential after the inner rail slides out; this is a crucial prerequisite for ensuring the normal operation and safe use of the equipment. If the inner rail detaches or malfunctions during the sliding process, it may lead to a series of serious consequences, such as damage to server equipment, spillage of items from drawers, and mechanical malfunctions.

[0005] Currently, some slide rail designs use manual pins to lock the inner rail. However, this traditional manual pin locking method has many obvious drawbacks. From an installation perspective, the manual pin installation process is cumbersome, requiring additional user intervention. This not only consumes a significant amount of user time and effort but also increases the complexity of slide rail use. For scenarios where ease of operation is crucial, this cumbersome installation process is clearly unacceptable. From an operational experience perspective, manual pins are prone to difficulty in insertion and removal during actual use, possibly due to low precision in the fit between the pin and the socket, or wear on the pin surface. Furthermore, manual pins are also at risk of being lost. Once a pin is lost, the slide rail's locking function will fail, severely impacting user experience and the normal operation of the slide rail. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to provide a locking structure and a slide rail, wherein the locking structure can automatically lock the first rail in both directions after the first rail slides relative to the second rail to a predetermined position.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: A locking structure for locking the first rail after it slides relative to the second rail to a predetermined position includes a locking unit and an unlocking unit. The locking unit is used to lock the first rail onto the second rail. The first rail and the second rail are configured to switch between a first active state, a locked state, and a second active state relative to each other. The locking unit includes a locking component, an elastic element, and a limiting component. The locking component is rotatably connected to the first rail. Each end of the locking component has a locking part, and the two locking parts protrude towards the sides of the locking component. The rotation center of the locking component is located between the two locking parts. The elastic element is provided on the locking component and provides it with rotational elastic force. The limiting component is provided on the second rail, and the limiting component has a through unlocking channel along the sliding direction of the first rail. In the first active state and the second active state, the locking component is restricted to the locking form by the limiting part of the locking component. The locking component is located on one side of the limiting component and is offset from the unlocking channel in the length direction of the first rail. When switching to the locked state, the locking part located at the front end of the movement direction abuts against one end of the limiting component and is guided by the first guide part provided on at least one of the adjacent ends to overcome the elastic force and drive the locking component to rotate to be opposite to the unlocking channel, so that the locking component enters the unlocking channel. When the locking part located at the front end of the movement direction extends out of the unlocking channel, the locking component rotates by the elastic force to elastically abut against the limiting component, and the locking part rotates to be misaligned with the unlocking channel. The two locking parts are respectively located on both sides of the limiting component and respectively cooperate with the two ends of the limiting component to restrict the locking component from moving in the directions of the first active state and the second active state, so as to restrict the locking component in the locked state. The unlocking unit is driven to the locking component and is used to overcome the elastic force to rotate the locking component to an unlocking state opposite to the unlocking channel, so that it can pass through the unlocking channel.

[0008] According to one embodiment of the present invention, the first guide portion is disposed on the outer end of the locking portion.

[0009] According to one embodiment of the present invention, the locking part is a locking protrusion, and the first guiding part is a first guiding surface, which is disposed on the outer end of the locking protrusion; When switching to the locked state, the first guide surface on the locking protrusion located at the front end of the movement direction abuts against one end of the limiting component and overcomes the elastic force to guide and drive the locking component to rotate to be opposite to the unlocking channel.

[0010] According to an embodiment of the present invention, the limiting component includes a first limiting block and a second limiting block, the first limiting block and the second limiting block are spaced apart along the length direction of the second rail and at the same time spaced apart along the width direction of the second rail, and the unlocking channel is located between the first limiting block and the second limiting block in the width direction of the second rail, and extends obliquely from the first limiting block to the second limiting block. The two locking parts are a first locking part and a second locking part, the first locking part and the first limiting block are located on the same side, and the second locking part and the second limiting block are located on the same side; and in the direction in which the first rail slides toward the second active state, the first limiting block and the first locking part are both located at the front end, and the second limiting block and the second locking part are both located at the rear end; When switching from the first active state to the locked state, the first locking part abuts against the first limiting block and rotates to be opposite the unlocking channel under the guidance of the first guide part; When switching from the second active state to the locked state, the second locking part abuts against the second limiting block and rotates to be opposite the unlocking channel under the guidance of the first guide part; When in the locked state, the first locking part cooperates with the first limiting block to restrict the locking component from moving toward the first active state direction, and the second locking part cooperates with the second limiting block to restrict the locking component from moving toward the second active state direction.

[0011] According to an embodiment of the present invention, when in the first active state, the first rail is slidably connected to the second rail, and when in the second active state, the first rail can be detached from the second rail; When the first track slides from the first active state toward the locked state, the locking part located at the front end of the movement direction abuts against the limiting component and is rotated by the guidance of the first guide part, so that the locking part located at the front end of the movement direction rotates to be opposite to the unlocking channel and can pass through the unlocking channel, while the locking part located at the rear end of the movement direction is misaligned with the unlocking channel.

[0012] According to an embodiment of the present invention, when in the first active state, the first rail is slidably connected to the second rail, and when in the second active state, the first rail can be detached from the second rail; The distance between the rotation center of the locking component and the locking part that cooperates with the limiting component to restrict the movement of the locking component toward the second active state direction is less than the distance between the locking component and the other locking part.

[0013] According to one embodiment of the present invention, the unlocking unit includes an unlocking member, which is slidably connected to the first rail along its length direction. The unlocking member is provided with a second guide portion. When the unlocking member slides relative to the first rail, it is driven and guided by the second guide portion to overcome the elastic force and drive the locking component to rotate to the unlocked state.

[0014] According to one embodiment of the present invention, a stop portion is provided on the first rail, the stop portion blocking the unlocking member to limit its sliding position in the opposite direction to the unlocking direction of the locking component; The locking limit part is disposed on the unlocking member, and the locking limit part is the second guide part. In the first active state and the second active state, the locking component abuts against the second guide part by the elastic force of the elastic member, and the locking component transmits the force to the unlocking member and the stop part in sequence through the second guide part.

[0015] According to one embodiment of the present invention, a blocking portion is provided at a position near the second guide portion or on the second guide portion of the unlocking member; When the unlocking member, guided by the second guide portion, rotates the locking component to the unlocked state, the blocking portion limits the locking component.

[0016] According to one embodiment of the present invention, the unlocking unit includes an adapter, the adapter protruding from one side of the locking component; The unlocking component has a connecting groove at one end near the locking component. The second guide portion is a second guide surface, which is located on the groove wall of the connecting groove near the locking component. The adapter is located in the connecting groove and abuts against the second guide surface by the elastic force of the elastic member. The blocking part is located near the second guide surface of the unlocking member, and the blocking part is a blocking surface, which is located on the groove wall adjacent to the second guide surface of the connecting groove.

[0017] According to one embodiment of the present invention, the locking limiting part is disposed on the first rail.

[0018] According to one embodiment of the present invention, the locking limiting part is an arc-shaped limiting part, the two ends of the arc-shaped limiting part are limiting ends, the center of the arc-shaped limiting part coincides with the rotation center of the locking component, one end of the locking component is movably connected to the arc-shaped limiting part, and one end of the locking component can move on the arc-shaped limiting part when the locking component rotates. In the first active state and the second active state, the locking component abuts against the limiting end at one end by the elastic force of the elastic element; When the unlocking member, guided by the second guide portion, rotates the locking component to the unlocked state, the limiting end at the other end limits the locking component.

[0019] According to one embodiment of the present invention, the arc-shaped limiting part is an arc-shaped groove, and the limiting ends at both ends are the groove walls at both ends of the arc-shaped groove; The unlocking unit includes an adapter, which is disposed at one end of the locking component and protrudes from one surface of the locking component, and is located within the arc-shaped groove.

[0020] Based on the same concept, the present invention also provides a slide rail including any of the locking structures described above.

[0021] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art: 1. This invention, through the ingenious cooperation of the locking and limiting components, automatically locks the slide rail in both directions after it slides relative to the second rail to a predetermined position, eliminating the need for manual operation. This feature not only simplifies the operation process and improves ease of use, but more importantly, it effectively avoids the risk of the first rail falling off during the sliding process due to ineffective fixation. This greatly ensures the safety and stability of the slide rail during use, providing a reliable guarantee for the normal operation of related equipment or devices. It is particularly suitable for applications with high requirements for safety and stability, such as precision instruments and equipment, and important industrial machinery.

[0022] During the locking process, the locking component in the lockable state needs to overcome the elastic force of the elastic element to rotate, and then enter the unlocking channel to switch to the locked state. This design allows the two locking parts of the locking component to move precisely to both sides of the limiting component when in the locked state, and to fit tightly with the two ends of the limiting component. This restricts the movement of the locking component from multiple directions, effectively preventing bidirectional movement of the locking component when subjected to external forces, further enhancing the reliability of the locking, and ensuring that the first rail can be stably maintained in the predetermined position in the locked state, without loosening or shifting due to unexpected circumstances.

[0023] When unlocking is required, the unlocking unit overcomes the elastic force, causing the locking component to rotate to the unlocking position opposite to the unlocking channel. The locking component then smoothly passes through the unlocking channel to unlock. Notably, this unlocking method via the unlocking channel enables simultaneous bidirectional unlocking, greatly simplifying the unlocking process and improving operational efficiency. Users no longer need to operate separately for different directions of locking; a single action completes bidirectional unlocking, saving time and effort. This is particularly suitable for situations requiring frequent locking and unlocking operations, enhancing the overall user experience and work efficiency.

[0024] 2. This invention innovatively designs the limiting components as a first limiting block and a second limiting block. Compared with traditional integral limiting components, this significantly reduces the overall size and effectively reduces space occupation, making it particularly suitable for installation environments with strict space requirements. Furthermore, the first and second limiting blocks can be directly formed by stamping on a second rail, eliminating the need for complex processing techniques and additional parts. This not only simplifies and facilitates the manufacturing process but also significantly reduces manufacturing costs and enhances the product's market competitiveness.

[0025] In this invention, the first and second limiting blocks are spaced apart along both the length and width directions of the second rail, and the unlocking channel is an inclined channel running from the first limiting block to the second limiting block. When switching to the locked state, the first and second locking parts enter the unlocking channel and elastically abut against the inner wall of either the first or second limiting block. Because the length of the unlocking channel wall is effectively reduced, the first and second locking parts can quickly pass through the unlocking channel and reach the locked state. From a practical perspective, this significantly shortens the locking stroke, allowing the first rail to enter the locked state more quickly relative to the second rail, thus improving the device's response speed and operating efficiency. If the unlocking channel wall is too long, the first and second locking parts will have to travel a longer distance within the unlocking channel to reach the locked state, undoubtedly increasing the locking time and reducing the device's operating efficiency.

[0026] Although this invention reduces the length of the unlocking channel wall, the length of the unlocking channel in the second rail direction is not reduced because the first and second limiting blocks are spaced apart. In the locked state, the first and second locking parts at both ends of the locking assembly are located on either side of the first and second limiting blocks, respectively, and the dimension of the unlocking channel in the second rail direction remains unaffected, thus ensuring that the locking assembly can maintain a relatively long length. This results in a longer lever arm between the first and second locking parts and the rotation center of the locking assembly, preventing excessive driving force during locking and unlocking, making the locking and unlocking operations smoother and easier. If the length of the locking assembly is too small, the torque required for its rotation will increase, making it difficult to drive and rotate, increasing the difficulty of locking and unlocking, and potentially affecting the normal use of the device. The technical solution of this invention effectively avoids this problem, ensuring the reliable implementation of the locking and unlocking functions.

[0027] 3. In this invention, when the first rail slides from the first active state towards the locked state, the locking part located at the front end in the movement direction rotates to be opposite the unlocking channel and passes smoothly under the cooperative action of the limiting component and the first guide part, while the locking part located at the rear end in the movement direction is misaligned with the unlocking channel. This design ensures that when the force driving the first rail to slide is too large, the rear locking part can always maintain a misaligned state with the unlocking channel, reliably restricting the first rail to the locked state. This effectively realizes the overload protection function, preventing the first rail from bypassing the locked state and directly reaching the second active state due to excessive driving force, thereby preventing the first rail from falling off the second rail. This ensures that the equipment installed on the first rail will not fall and be damaged due to the first rail falling off, improving the stability and safety of the entire device.

[0028] If the locking part located at the rear end of the moving direction is not misaligned with the unlocking channel but is opposite to it, when the force driving the first rail is too large, the sliding speed of the first rail will be too fast, and the rear locking part will directly enter the unlocking channel, causing the first rail to skip the locked state and directly reach the second active state. The technical solution of this invention avoids this abnormal sliding situation by misaligning the rear locking part with the unlocking channel, ensuring that the first rail can switch according to the preset sliding sequence and state, preventing the first rail from going out of control, and guaranteeing the accuracy and reliability of the entire system operation.

[0029] 4. The locking component of this invention adopts a rotation axis offset design, meaning that the distance between the rotation center of the locking component and the locking part that is restricted by the limiting component to move towards the second active state is less than the distance between the locking component and another locking part. When the first rail slides relative to the second rail from the first active state to the locked state, the lever arm between the locking part at the front end of the movement direction and the rotation center of the locking component is greater than the lever arm between the locking part at the rear end and the rotation center. According to the principle of mechanics, the larger the lever arm, the smaller the driving force required. Therefore, when the front locking part abuts against the limiting component, it can be more easily driven to rotate. This allows the front locking part to respond quickly and cooperate with the limiting component during the sliding process of the first rail towards the locked state, guiding the entire locking component into the correct locking process. This improves the smoothness and timeliness of the locking operation and reduces potential problems caused by operational inconsistencies.

[0030] During the locking process, the rear locking part abuts against the limiting component to form a locking limit, preventing the locking component from moving towards the second active state. However, when the force driving the first rail to slide is too large, traditional designs may experience locking failure and rotation of the locking component due to impact between the locking part and the limiting component, or the locking part and limiting component may deform locally due to excessive impact, resulting in an unstable lock and thus the risk of overload failure. The offset rotation axis design of this invention results in a smaller lever arm between the rear locking part and the rotation center of the locking component. According to the torque balance principle, a larger force is required to drive the locking component to rotate. Therefore, when faced with excessive driving force, the locking component is less likely to be accidentally driven to rotate, greatly reducing the risk of overload failure. Since the second rail can detach from the first rail in the second active state, reducing the risk of overload failure effectively prevents the first rail from skipping the locked state and directly reaching the second active state, causing it to fall off. This significantly enhances the locking reliability and stability of the entire slide rail system, ensuring the safety of equipment installed on the first rail.

[0031] 5. This invention cleverly uses the second guide portion on the unlocking component as a locking limit portion. In the first and second active states, the locking component abuts against the second guide portion under the elastic force of the elastic element. Simultaneously, the stop portion on the first rail blocks the unlocking component, restricting its sliding in the opposite direction to the unlocking direction of the driving locking component. This design creates a stable structure of mutual support and limitation between the locking component and the unlocking component. The locking component transmits force sequentially to the unlocking component and the stop portion through the second guide portion, ensuring that it is in a locking state in both the first and second active states.

[0032] The unlocking component provides precise limiting for the locking component in both the first and second active states, while the locking component, through its elastic force, also provides reverse limiting for the unlocking component. This bidirectional limiting mechanism effectively prevents the unlocking component from shaking due to external forces in both the first and second active states. In traditional designs, the shaking of the unlocking component can generate significant noise, affecting the user experience. The technical solution of this invention, by optimizing the limiting structure, reduces noise generation at its source, creating a quieter and more comfortable user environment, and improving the overall product quality and user satisfaction.

[0033] From a structural design perspective, the technical solution of this invention reduces the need for additional components that limit the unlocking element, such as traditional springs. By utilizing the interaction force between the locking assembly and the unlocking element, as well as the blocking effect of the stop, reliable limiting of the unlocking element is achieved, avoiding complex limiting structure design and the use of additional parts. The advantages of this simplified design not only reduce product manufacturing costs but also reduce the complexity and difficulty of the assembly process, improving production efficiency. Furthermore, it reduces the probability of product malfunctions during use, improving product reliability and maintainability.

[0034] 6. This invention, by incorporating a blocking portion, effectively limits the locking component when it rotates to the unlocked position, guided by the second guide portion, thus stably confining it in the unlocked state. This design prevents the locking component from misaligning with the unlocking channel due to excessive rotation during unlocking, ensuring that the locking component can smoothly pass through the unlocking channel to complete the unlocking operation, greatly improving the reliability and success rate of unlocking. In practical applications, if the locking component rotates excessively and misaligns with the unlocking channel, unlocking will fail, meaning that unlocking will be unstable and unsmooth.

[0035] In one embodiment, the blocking part is cleverly disposed on the unlocking component. The unlocking component has a connecting groove at one end near the locking component, and the second guide part is a second guide surface. The blocking part is located on the groove wall adjacent to the connecting groove and the second guide surface. This design makes the installation of the blocking part simpler and more convenient, eliminating the need for additional dedicated components to achieve the limiting function. By making reasonable use of the existing structure of the unlocking component, not only is the overall structure simplified and manufacturing costs reduced, but the complexity and difficulty of the assembly process are also reduced, improving production efficiency. At the same time, reducing the use of additional components also reduces the probability of product failure during use, improving product reliability and maintainability. Attached Figure Description

[0036] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 Isometric view in locked state in this invention Figure 1; Figure 2 Isometric view in locked state in this invention Figure 2 ; Figure 3 For the present invention Figure 1 A magnified view of a portion of the image; Figure 4 This is a partially enlarged view of the second track of the present invention; Figure 5 This is a schematic diagram of the unlocking channel of the present invention; Figure 6 This is a schematic diagram of the locking component, unlocking unit, and first track assembly of the present invention; Figure 7 This is a schematic diagram showing the cooperation between the locking component and the unlocking unit of the present invention; Figure 8 This is a schematic diagram of the locked state of the present invention after the first track and the unlocking component have been removed. Figure 9 This is a schematic diagram of the first active state after the first track is hidden in this invention; Figure 10 This is a schematic diagram of the locked state after the first track is hidden in this invention; Figure 11 This is a schematic diagram of the second active state of the present invention; Figure 12 This is a schematic diagram of the locking component of the present invention.

[0037] Explanation of reference numerals in the attached figures: 1. First rail; 11. Arc groove; 12. Stop block; 13. Slide groove; 2. Second rail; 21. First limiting block; 22. Second limiting block; 31. Locking component; 32. Rotating shaft; 33. Torsion spring; 34. First locking protrusion; 35. Second locking protrusion; 36. First guide surface; 37. Rivet; 4. Unlocking component; 41. Connecting groove; 42. Second guide surface; 43. Blocking surface; 44. Operating component; 5. Unlocking channel. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0040] Example 1 See Figures 1 to 12 The core of this invention is to provide a locking structure for bidirectionally locking the first rail 1 after it slides relative to the second rail 2 to a predetermined position. The locking structure includes a locking unit and an unlocking unit. The locking unit is used to lock the first rail 1 onto the second rail 2, and the unlocking unit is driven to the locking unit to drive the locking unit to move and unlock.

[0041] The second rail 2 can be connected to other rails to expand and connect the rail system; it can also be directly installed on the frame as a basic support structure for equipment sliding. The first rail 1 is mainly used to connect with the equipment to be installed, providing sliding guidance for the equipment; in addition, the first rail 1 can be further connected to other rails to meet the rail layout requirements in different scenarios.

[0042] In practical applications, to ensure stable and smooth sliding of the equipment, a first rail 1 and a second rail 2 are symmetrically arranged on both sides of the equipment, with each side of the equipment firmly connected to the corresponding first rail 1. In this way, the equipment can be easily pulled out from inside the frame by means of the relative sliding between the first rail 1 and the second rail 2 for equipment maintenance, repair, or operation; it can also be smoothly retracted into the frame for storage and protection, greatly improving the convenience and flexibility of equipment use.

[0043] The first rail 1 and the second rail 2 can flexibly switch between a first active state, a locked state, and a second active state. When the first rail 1 extends outward from the second rail 2, it will sequentially pass through the first active state and finally reach the locked state. When it reaches the locked state, the first rail 1 is in the fully extended position. At this time, with the reliable action of the locking unit, the first rail 1 is firmly locked, ensuring that the connected equipment can maintain a stable state, thereby providing a solid guarantee for the maintenance, repair, or operation of the equipment.

[0044] In the locked state, the unlocking unit allows the first rail 1 to switch from a locked state to a first active state or a second active state relative to the second rail 2. When switching from the locked state to the first active state, the first rail 1 gradually retracts; when switching to the second active state, the first rail 1 completely detaches from the second rail 2. This allows the device to be easily removed from the rack, facilitating various related operations for the user. Notably, through specific operations of the unlocking unit, it is also possible to bypass the locked state and directly switch from the first active state to the second active state, further enhancing operational flexibility and convenience.

[0045] The locking unit includes a locking component, an elastic element, and a limiting component. The locking component is rotatably connected to the first rail 1. Each end of the locking component has a locking part, and the two locking parts protrude towards the sides of the locking component. The rotation center of the locking component is located between the two locking parts. The elastic element is provided on the locking component and provides it with rotational elastic force. The limiting component is provided on the second rail 2, and the limiting component has a through unlocking channel 5 along the sliding direction of the first rail 1.

[0046] In the first and second active states, the locking component restricts the lockable portion to the lockable state by limiting it. The locking component is located on one side of the limiting component and is offset from the unlocking channel 5.

[0047] The two locking parts are a first locking part and a second locking part. When switching to the locked state, the first locking part located at the front end of the movement direction abuts against one end of the limiting component and is guided by the first guide part provided on at least one of the adjacent ends to overcome the elastic force and drive the locking component to rotate to be opposite to the unlocking channel 5, so that the locking component enters the unlocking channel 5. When the first locking part located at the front end of the movement direction extends out of the unlocking channel 5, the locking component rotates by the elastic force to elastically abut against the limiting component, and the first locking part rotates to be misaligned with the unlocking channel 5. The first locking part and the second locking part are located on both sides of the limiting component and cooperate with the two ends of the limiting component to restrict the locking component to move in the direction of the first active state and the second active state, so as to restrict the locking component in the locked state. The unlocking unit is driven to connect with the locking component, and is used to overcome the elastic force to rotate the locking component to the unlocking state opposite to the unlocking channel 5, so that it can pass through the unlocking channel 5.

[0048] Specifically, in this embodiment, the locking component is a locking member 31, which is rotatably connected to the first rail 1 via a rotating shaft 32 located between the two ends of the locking member 31. The locking portion is a locking protrusion; the first locking portion and the second locking portion are respectively a first locking protrusion 34 and a second locking protrusion 35, which are respectively located at both ends of the locking member 31 and protrude towards both sides of the locking member 31. The elastic element is specifically a torsion spring 33.

[0049] The first guide portion is located on the outer end of the first locking protrusion 34 and the second locking protrusion 35, that is, the end away from the rotating shaft 32. In this embodiment, the first guide portion is a first guide surface 36, which is located on the outer end of the locking protrusion. The first guide surface 36 can be an inclined surface, a curved surface, etc., which can guide linear motion into rotational motion.

[0050] The limiting component includes a first limiting block 21 and a second limiting block 22. The first limiting block 21 and the second limiting block 22 are spaced apart along the length direction of the second rail 2 and also spaced apart along the width direction of the second rail 2. The unlocking channel 5 is located between the first limiting block 21 and the second limiting block 22 in the width direction of the second rail 2. The unlocking channel 5 is an inclined channel from the first limiting block 21 to the second limiting block 22, that is, the unlocking channel 5 is formed as a parallelogram channel.

[0051] The first locking protrusion 34 and the first limiting block 21 are located on the same side, and the second locking protrusion 35 and the second limiting block 22 are located on the same side; and in the direction in which the first rail 1 slides toward the second active state, the first limiting block 21 and the first locking protrusion 34 are both located at the front end, and the second limiting block 22 and the second locking protrusion 35 are both located at the rear end.

[0052] When switching from the first active state to the locked state, the first guide surface 36 on the first locking protrusion 34 abuts against the first limiting block 21 and rotates under the guidance of the first guide surface 36 to be opposite to the unlocking channel 5; when switching from the second active state to the locked state, the first guide surface 36 on the second locking protrusion 35 abuts against the second limiting block 22 and rotates under the guidance of the first guide surface 36 to be opposite to the unlocking channel 5; when in the locked state, the first locking protrusion 34 and the first limiting block 21 cooperate to restrict the locking member 31 from moving toward the first active state direction, and the second locking protrusion 35 and the second limiting block 22 cooperate to restrict the locking member 31 from moving toward the second active state direction.

[0053] This invention innovatively designs the limiting components as a first limiting block 21 and a second limiting block 22. Compared with traditional integral limiting components, this significantly reduces the overall size and effectively reduces space occupation, making it particularly suitable for installation environments with strict space requirements. Furthermore, the first limiting block 21 and the second limiting block 22 can be directly formed by stamping using the second rail 2, eliminating the need for complex processing techniques and additional parts. This not only simplifies and facilitates the manufacturing process but also significantly reduces manufacturing costs and enhances the product's market competitiveness.

[0054] In this invention, the first limiting block 21 and the second limiting block 22 are spaced apart along both the length and width directions of the second rail 2. The unlocking channel 5 is an inclined parallelogram channel extending from the first limiting block 21 towards the second limiting block 22. When switching to the locked state, the first locking protrusion 34 and the second locking protrusion 35 enter the unlocking channel 5 and elastically abut against the inner wall of either the first limiting block 21 or the second limiting block 22. Because the length of the unlocking channel 5 is effectively reduced, the first locking protrusion 34 and the second locking protrusion 35 can quickly pass through the unlocking channel 5 and reach the locked state. From a practical perspective, this significantly shortens the locking stroke, allowing the first rail 1 to enter the locked state more quickly relative to the second rail 2, thus improving the device's response speed and operating efficiency. If the unlocking channel 5 is too long, the first locking protrusion 34 and the second locking protrusion 35 will travel a longer distance within the unlocking channel 5 to reach the locked state, undoubtedly increasing the locking time and reducing the device's operating efficiency.

[0055] Although the present invention reduces the length of the channel wall of the unlocking channel 5, the length of the unlocking channel 5 in the length direction of the second rail 2 is not reduced because the first limiting block 21 and the second limiting block 22 maintain a certain interval in the length direction of the second rail 2. In the locked state, the first locking protrusion 34 and the second locking protrusion 35 at both ends of the locking member 31 are located on both sides of the first limiting block 21 and the second limiting block 22, respectively. The dimension of the unlocking channel 5 in the length direction of the second rail 2 is not affected, thus ensuring that the locking member 31 can maintain a relatively long length. In this way, the first locking protrusion 34 and the second locking protrusion 35 have a relatively long lever arm from the rotation center of the locking member 31. During the locking and unlocking process, the required driving force will not be too large, making the locking and unlocking operation smoother and easier. If the length of the locking member 31 is too small, the torque required for its rotation will increase, making it difficult to be driven to rotate, increasing the difficulty of locking and unlocking, and may even affect the normal use of the device. The technical solution of the present invention effectively avoids this problem and ensures the reliable implementation of the locking and unlocking functions.

[0056] Preferably, when the first track 1 slides from the first active state toward the locked state, the first locking protrusion 34 located at the front end of the movement direction abuts against the first limiting block 21 and is driven to rotate by the guidance of the first guiding surface 36, so that the first locking protrusion 34 rotates to be opposite to the unlocking channel 5 and can pass through the unlocking channel 5. The second locking protrusion 35 located at the rear end of the movement direction is misaligned with the unlocking channel 5. That is to say, the second limiting block 22 is always located on the movement stroke of the second locking protrusion 35, and the second limiting block 22 cannot directly pass over the second locking protrusion 35.

[0057] This design ensures that when the force driving the first rail 1 to slide is too great, the second locking protrusion 35 at the rear end can always remain misaligned with the unlocking channel 5, reliably restricting the first rail 1 to the locked state. This effectively realizes the overload protection function, preventing the first rail 1 from bypassing the locked state and directly reaching the second active state due to excessive driving force. This prevents the first rail 1 from falling off the second rail 2, ensuring that the equipment installed on the first rail 1 will not fall and be damaged due to the first rail 1 falling off, and improving the stability and safety of the entire device operation.

[0058] If the second locking protrusion 35 located at the rear end of the moving direction is not misaligned with the unlocking channel 5 but is opposite to it, when the force driving the first rail 1 is too large, the sliding speed of the first rail 1 will be too fast, and the second locking protrusion 35 will bypass the second limit block 22 and directly enter the unlocking channel 5, causing the first rail 1 to skip the locked state and directly reach the second active state. The technical solution of this invention avoids this abnormal sliding situation by misaligning the second locking protrusion 35 with the unlocking channel 5, ensuring that the first rail 1 can switch according to the preset sliding sequence and state, preventing the first rail 1 from going out of control, and ensuring the accuracy and reliability of the entire system operation.

[0059] Specifically, the overload protection function of misalignment between the second locking protrusion 35 and the second limiting block 22 can be achieved by increasing the height of the second locking protrusion 35 so that its height is higher than that of the first locking protrusion 34. Alternatively, when the heights of the first locking protrusion 34 and the second locking block are the same, the rotation center of the locking member 31 can be offset towards the second limiting block 22 in the width direction of the first rail 1.

[0060] The distance between the rotation center of the locking element 31 and the second locking block is less than the distance between the locking element 31 and the first locking protrusion 34. In other words, the locking element 31 adopts a rotation axis offset design. When the first rail 1 slides relative to the second rail 2 from the first active state to the locked state, the lever arm between the first locking protrusion 34 and the rotation center of the locking element 31 is greater than the lever arm between the second locking protrusion 35 and the rotation center. According to the principle of mechanics, the larger the lever arm, the smaller the driving force required. Therefore, when the first locking protrusion 34 abuts against the first limiting block 21, it can be more easily driven to rotate. This allows the first locking protrusion 34 to respond quickly and cooperate with the first limiting block 21 during the sliding process of the first rail 1 from the first active state to the locked state, guiding the entire locking element 31 into the correct locking process. This improves the smoothness and timeliness of the locking operation and reduces potential problems caused by operational difficulties.

[0061] During the locking process, the second locking protrusion 35 and the second limiting block 22 form a locking limit to prevent the locking member 31 from moving towards the second active state. However, when the force driving the first rail 1 to slide is too large, conventional designs may result in the locking member 31 failing to lock and rotating due to the impact between the second locking protrusion 35 and the second limiting block 22, or the second locking protrusion 35 and the second limiting block 22 becoming locally deformed due to excessive impact, making the lock insecure and thus leading to the risk of overload failure. The offset design of the rotation axis of this invention makes the lever arm between the rotation center of the second locking protrusion 35 and the locking member 31 smaller. According to the torque balance principle, a larger force is required to drive the locking member 31 to rotate. Therefore, when faced with excessive driving force, the locking member 31 is less likely to be accidentally driven to rotate, greatly reducing the risk of overload failure. Since the second rail 2 can detach from the first rail 1 in the second active state, the risk of overload failure is reduced. This effectively prevents the first rail 1 from skipping the locked state and directly reaching the second active state, thus avoiding detachment. This significantly enhances the locking reliability and stability of the entire slide rail system, ensuring the safety of equipment installed on the first rail 1. The overload protection function, combined with the misalignment of the second locking protrusion 35 and the second limit block 22, further strengthens the overall overload protection capability.

[0062] The unlocking unit includes an unlocking component 4, which is elongated and extends to the end of the first rail 1 away from the direction in which the second rail 2 extends. This allows the user to easily operate the unlocking component 4 when the first rail 1 is in the locked state relative to the second rail 2. The unlocking component 4 is slidably connected to the first rail 1 along its length. The unlocking component 4 is provided with a second guide portion. When the unlocking component 4 slides relative to the first rail 1, the second guide portion drives and guides the locking component 31 to rotate to the unlocked state, overcoming the elastic force.

[0063] An operating element 44 is also provided at the end of the unlocking element 4 away from the locking element 31. The operating element 44 protrudes from the unlocking element 4, and can be easily moved by hand. A slide groove 13 is also provided on the first track 1 corresponding to the position of the operating element 44. A slider protrudes from the operating element 44 and is located in the slide groove 13. When the unlocking element 4 moves, the slider moves in the slide groove 13, and the slide groove 13 can limit the travel of the operating element 44.

[0064] In this embodiment, in both the first and second active states, the locking member 31 is restricted to a locking position on the first track 1. The locking position is an arc-shaped limiting part with limiting ends at both ends. The center of the arc-shaped limiting part coincides with the rotation center of the locking member 31. One end of the locking member 31 is movably connected to the arc-shaped limiting part, and when the locking member 31 rotates, one end can move on the arc-shaped limiting part.

[0065] Specifically, the arc-shaped limiting part is an arc-shaped groove 11, and the limiting ends at both ends are the groove walls at both ends of the arc-shaped groove 11. The unlocking unit also includes an adapter, which protrudes from one side of the locking member 31. In this embodiment, the adapter is a rivet 37, which is disposed in the arc-shaped groove 11. When the locking member 31 rotates, the rivet 37 can move along the arc-shaped groove 11. In the first active state and the second active state, the elastic force of the torsion spring 33 on the locking member 31 is transmitted to the groove wall on one side of the arc-shaped groove 11 through the rivet 37, and the locking member 31 is restricted to the locking state by the groove wall on one side of the arc-shaped groove 11.

[0066] When the unlocking component 4, guided by the second guide, rotates the locking component 31 to the unlocked position, the rivet 37 abuts against the groove wall on the other side of the arc-shaped groove 11, thus securing the locking component 31 in the unlocked position. This design prevents the locking component 31 from becoming misaligned with the unlocking channel 5 due to excessive rotation during the unlocking process, ensuring that the locking component 31 can smoothly pass through the unlocking channel 5 to complete the unlocking operation, greatly improving the reliability and success rate of unlocking. In practical applications, if the locking component 31 rotates excessively and becomes misaligned with the unlocking channel 5, it will lead to unlocking failure, meaning that unlocking will be unstable and unsmooth.

[0067] Specifically, the unlocking part 4 has a connecting groove 41 at one end near the locking part 31, the second guide part is a second guide surface 42, the second guide surface 42 is provided on the groove wall of the connecting groove 41 near the locking part 31, and the rivet 37 is provided in the connecting groove 41.

[0068] Furthermore, a stop portion is provided on the first track 1, which blocks the unlocking member 4 to limit its sliding position in the opposite direction to the unlocking direction of the driving locking member 31. In this embodiment, the stop portion is a stop block 12.

[0069] The working process of this invention will be further explained below: In the first active state, the locking member 31 is restrained in the locking state by the elastic force of the torsion spring 33 and the rivet 37 against the groove wall on one side of the arc groove 11.

[0070] When switching from the first active state to the locked state, the first rail 1 slides outward relative to the second rail 2. The first guide surface 36 on the first locking protrusion 34 abuts against the first limiting block 21 and drives the locking member 31 to rotate through the guidance of the first guide surface 36, so that the first locking protrusion 34 rotates to be opposite to the unlocking channel 5. Then the first locking protrusion 34 enters the unlocking channel 5 and abuts against the inner side wall of the first limiting block 21 by elastic force. When the first locking protrusion 34 extends out of the unlocking channel 5, the locking member 31 rotates by elastic force to abut against the first limiting block 21 and the second limiting block 22. The first locking protrusion 34 and the second locking protrusion 35 are respectively located on both sides of the unlocking channel 5. In the locked state, the locking member 31 abuts against the first limiting block 21 and the second limiting block 22 by elastic force. The first locking protrusion 34 cooperates with the first limiting block 21 to restrict the locking member 31 from moving toward the first active state direction. The second locking protrusion 35 cooperates with the second limiting block 22 to restrict the locking member 31 from moving toward the second active state direction. The locking member 31 is restricted to the locked state.

[0071] When switching from the locked state to the second active state, the unlocking member 4 slides away from the locking member 31 and guides the rivet 37 through the second guide surface 42 to drive the locking member 31 to rotate against the elastic force. When the rivet 37 abuts against the groove wall on the other side of the arc groove 11, the locking member 31 is restricted to the unlocked state. At this time, the first locking protrusion 34 and the second locking protrusion 35 are opposite to the unlocking channel 5. The entire locking member 31 can reach the second active state through the unlocking channel 5. When the locking member 31 extends out of the unlocking channel 5, the unlocking member 4 is released. The locking member 31 is reset and rotated by the elastic force, and the unlocking member 4 is reset by the driving force of the locking member 31.

[0072] In the second active state, the locking member 31 is restrained in the locking state by the elastic force of the torsion spring 33 and the rivet 37 against the groove wall on one side of the arc groove 11.

[0073] When switching from the second active state to the locked state, the first rail 1 slides inward relative to the second rail 2 and retracts. The first guide surface 36 on the second locking protrusion 35 abuts against the second limiting block 22 and drives the locking member 31 to rotate through the guidance of the first guide surface 36, so that the second locking protrusion 35 rotates to be opposite to the unlocking channel 5. Then the second locking protrusion 35 enters the unlocking channel 5 and abuts against the inner side wall of the second limiting block 22 by elastic force. When the second locking protrusion 35 extends out of the unlocking channel 5, the locking member 31 rotates by elastic force to abut against the first limiting block 21 and the second limiting block 22. The first locking protrusion 34 and the second locking protrusion 35 are located on both sides of the unlocking channel 5.

[0074] When switching from the locked state to the first active state, the unlocking member 4 slides away from the locking member 31 and guides the rivet 37 through the second guide surface 42 to drive the locking member 31 to rotate against the elastic force. When the rivet 37 abuts against the groove wall on the other side of the arc groove 11, the locking member 31 is restricted to the unlocked state. At this time, the first locking protrusion 34 and the second locking protrusion 35 are both opposite to the unlocking channel 5. The entire locking member 31 can reach the first active state through the unlocking channel 5. When the locking member 31 extends out of the unlocking channel 5, the unlocking member 4 is released. The locking member 31 is reset and rotated by the elastic force, and the unlocking member 4 is reset by the driving force of the locking member 31.

[0075] Example 2 Referring to the figure, based on Embodiment 1, the difference between this embodiment and Embodiment 1 is that the locking limit part in this embodiment is provided on the unlocking member 4.

[0076] The unlocking component 4 is provided with a second guide part. When the unlocking component 4 slides relative to the first track 1, it is driven and guided by the second guide part to overcome the elastic force and drive the locking component 31 to rotate to the unlocked state.

[0077] The first track 1 is provided with a stop part, which blocks the unlocking member 4 to limit its sliding position in the opposite direction to the unlocking direction of the driving locking member 31. In this embodiment, the stop part is a stop block 12.

[0078] The locking limit part is the second guide part. In the first active state and the second active state, the locking member 31 abuts against the second guide part by the elastic force of the torsion spring 33, and the locking member 31 transmits the force to the unlocking member 4 and the stop block 12 in sequence through the second guide part.

[0079] A blocking part is provided at the position of the unlocking part 4 near the second guide part or on the second guide part; when the unlocking part 4 drives the locking part 31 to rotate to the unlocked state through the guidance of the second guide part, the blocking part limits the locking part 31.

[0080] This design prevents the locking element 31 from becoming misaligned with the unlocking channel 5 due to excessive rotation during the unlocking process, thus ensuring that the locking element 31 can smoothly pass through the unlocking channel 5 to complete the unlocking operation, greatly improving the reliability and success rate of unlocking. In practical applications, if the locking element 31 rotates excessively and becomes misaligned with the unlocking channel 5, it will lead to unlocking failure, meaning that unlocking will be unstable and unsmooth.

[0081] Specifically, the unlocking unit includes an adapter that protrudes from one side of the locking member 31. In this embodiment, the adapter is a rivet 37. The unlocking member 4 has a connecting groove 41 near the locking member 31. The second guide is a second guide surface 42, which is located on the groove wall of the connecting groove 41 near the locking member 31. The rivet 37 is located within the connecting groove 41 and abuts against the second guide surface 42 by the elastic force of the torsion spring 33. A blocking part is located on the unlocking member 4 near the second guide surface 42, specifically a blocking surface 43, which is located on the groove wall adjacent to the connecting groove 41 and the second guide surface 42. When the unlocking member 4 guides the rivet 37 to move through the second guide surface 42 until it abuts against the blocking surface 43, the rivet 37 can no longer move, and the locking member 31 rotates to the unlocked state.

[0082] This invention cleverly uses the second guide surface 42 on the unlocking member 4 as a locking limiting part. In the first and second active states, the locking component abuts against the second guide surface 42 under the elastic force of the elastic member. Simultaneously, the stop 12 on the first track 1 blocks the unlocking member 4, restricting its sliding in the opposite direction to the unlocking direction of the driving locking member 31. This design creates a stable structure of mutual support and limitation between the locking member 31 and the unlocking member 4. The locking member 31 transmits force sequentially to the unlocking member 4 and the stop 12 through the second guide surface 42, ensuring that it is in a locking state in both the first and second active states.

[0083] The unlocking component 4 provides precise limiting for the locking component 31 in both the first and second active states, while the locking component 31, through its elastic force, also provides reverse limiting for the unlocking component 4. This bidirectional limiting mechanism effectively prevents the unlocking component 4 from shaking due to external forces in both the first and second active states. In traditional designs, the shaking of the unlocking component 4 may generate noticeable noise, affecting the user experience. The technical solution of this invention, by optimizing the limiting structure, reduces noise generation at its source, creating a quieter and more comfortable user environment, and improving the overall product quality and user satisfaction.

[0084] From a structural design perspective, the technical solution of this invention reduces the need for additional components to limit the unlocking element 4, such as traditional springs. By utilizing the interaction force between the locking element 31 and the unlocking element 4, as well as the blocking effect of the stop block 12, reliable limiting of the unlocking element 4 is achieved, avoiding complex limiting structure design and the use of additional components. The advantages of this simplified design are not only reduced manufacturing costs, but also reduced complexity and difficulty in the assembly process, improved production efficiency, and reduced probability of product failure during use, thus improving product reliability and maintainability.

[0085] The working process of this invention will be further explained below: In the first active state, the locking member 31 abuts against the second guide surface 42 of the unlocking member 4 by means of the elastic force of the torsion spring 33 and the rivet 37, and the unlocking member 4 abuts against the stop block 12 by the force transmitted by the rivet 37, so that the locking member 31 is restricted to the locked state.

[0086] When switching from the first active state to the locked state, the first rail 1 slides outward relative to the second rail 2. The first guide surface 36 on the first locking protrusion 34 abuts against the first limiting block 21 and drives the locking member 31 to rotate through the guidance of the first guide surface 36, so that the first locking protrusion 34 rotates to be opposite to the unlocking channel 5. Then the first locking protrusion 34 enters the unlocking channel 5 and abuts against the inner side wall of the first limiting block 21 by elastic force. When the first locking protrusion 34 extends out of the unlocking channel 5, the locking member 31 rotates by elastic force to abut against the first limiting block 21 and the second limiting block 22. The first locking protrusion 34 and the second locking protrusion 35 are respectively located on both sides of the unlocking channel 5. In the locked state, the locking member 31 abuts against the first limiting block 21 and the second limiting block 22 by elastic force. The first locking protrusion 34 cooperates with the first limiting block 21 to restrict the locking member 31 from moving toward the first active state direction. The second locking protrusion 35 cooperates with the second limiting block 22 to restrict the locking member 31 from moving toward the second active state direction. The locking member 31 is restricted to the locked state.

[0087] When switching from the locked state to the second active state, the unlocking member 4 slides away from the locking member 31 and guides the rivet 37 through the second guide surface 42 to drive the locking member 31 to rotate against the elastic force. When the rivet 37 abuts against the blocking surface 43, the locking member 31 is restricted to the unlocked state. At this time, the first locking protrusion 34 and the second locking protrusion 35 are both opposite to the unlocking channel 5. The entire locking member 31 can reach the second active state through the unlocking channel 5. When the locking member 31 extends out of the unlocking channel 5, the unlocking member 4 is released. The locking member 31 is reset and rotated by the elastic force, and the unlocking member 4 is reset by the driving force of the locking member 31.

[0088] In the second active state, the locking member 31 abuts against the second guide surface 42 of the unlocking member 4 by the elastic force of the torsion spring 33 and with the help of the rivet 37. The unlocking member 4 abuts against the stop block 12 by the force transmitted by the rivet 37, so that the locking member 31 is restricted to the locked state.

[0089] When switching from the second active state to the locked state, the first rail 1 slides inward relative to the second rail 2 and retracts. The first guide surface 36 on the second locking protrusion 35 abuts against the second limiting block 22 and drives the locking member 31 to rotate through the guidance of the first guide surface 36, so that the second locking protrusion 35 rotates to be opposite to the unlocking channel 5. Then the second locking protrusion 35 enters the unlocking channel 5 and abuts against the inner side wall of the second limiting block 22 by elastic force. When the second locking protrusion 35 extends out of the unlocking channel 5, the locking member 31 rotates by elastic force to abut against the first limiting block 21 and the second limiting block 22. The first locking protrusion 34 and the second locking protrusion 35 are located on both sides of the unlocking channel 5.

[0090] When switching from the locked state to the first active state, the unlocking member 4 slides away from the locking member 31 and guides the rivet 37 through the second guide surface 42 to drive the locking member 31 to rotate against the elastic force. When the rivet 37 abuts against the blocking surface 43, the locking member 31 is restricted to the unlocked state. At this time, the first locking protrusion 34 and the second locking protrusion 35 are both opposite to the unlocking channel 5. The entire locking member 31 can reach the first active state through the unlocking channel 5. When the locking member 31 extends out of the unlocking channel 5, the unlocking member 4 is released. The locking member 31 is reset and rotated by the elastic force, and the unlocking member 4 is reset by the driving force of the locking member 31.

[0091] Example 3 See Figures 1 to 12 Another core innovation of this invention is to provide a slide rail that includes at least the locking structure described in Embodiment 1 or Embodiment 2. The slide rail mentioned in this embodiment is a server slide rail, specifically in the form of a three-section or two-section slide rail.

[0092] Taking a three-section slide rail as an example, it mainly consists of an inner rail, a middle rail, and an outer rail. Typically, the inner rail is slidably connected to the middle rail via beaded rings, and the middle rail is similarly slidably connected to the outer rail via beaded rings. A two-section slide rail, compared to a three-section slide rail, has one less sliding rail, consisting only of an inner rail and an outer rail.

[0093] In practical applications of three-section slide rails, a reliable locking and positioning mechanism is essential to prevent accidental detachment or malfunction during the sliding process of the inner rail. Therefore, a locking structure is incorporated between the inner rail and the middle rail. This locking structure activates when the inner rail extends relative to the middle rail, securely locking the inner rail to the middle rail. Specifically, in Embodiment 1, the first rail 1 corresponds to the inner rail, and the second rail 2 corresponds to the middle rail.

[0094] This invention, through the ingenious cooperation of locking and limiting components, automatically locks the first rail 1 in both directions after it slides relative to the second rail 2 to a predetermined position, eliminating the need for manual operation. This feature not only simplifies the operation process and improves ease of use, but more importantly, it effectively avoids the risk of the first rail 1 falling off during the sliding process due to ineffective fixation. This greatly ensures the safety and stability of the slide rail during use, providing a reliable guarantee for the normal operation of related equipment or devices. It is particularly suitable for applications with high requirements for safety and stability, such as precision instruments and equipment, and important industrial machinery.

[0095] During the locking process, the locking component in the lockable state needs to overcome the elastic force of the elastic element to rotate, and then enter the unlocking channel 5 to switch to the locked state. This design allows the two locking parts of the locking component to move precisely to both sides of the limiting component when in the locked state, and to fit tightly with the two ends of the limiting component. This restricts the movement of the locking component from multiple directions, effectively preventing the locking component from moving in both directions when subjected to external forces, further enhancing the reliability of the lock, and ensuring that the first rail 1 can be stably maintained in the predetermined position in the locked state, without loosening or shifting due to unexpected circumstances.

[0096] When unlocking is required, the unlocking unit overcomes the elastic force, causing the locking component to rotate to the unlocking position opposite to the unlocking channel 5. The locking component can then smoothly pass through the unlocking channel 5 to unlock. Notably, this unlocking method via the unlocking channel 5 enables simultaneous bidirectional unlocking, greatly simplifying the unlocking process and improving operational efficiency. Users no longer need to operate separately for locking in different directions; a single action is sufficient for bidirectional unlocking, saving time and effort. This is particularly suitable for situations requiring frequent locking and unlocking operations, enhancing the overall user experience and work efficiency.

[0097] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A locking structure for locking the first rail after it has slid relative to the second rail to a predetermined position, characterized in that, It includes a locking unit and an unlocking unit, the locking unit being used to lock the first rail onto the second rail; the first rail and the second rail are configured to switch between a first active state, a locked state and a second active state relative to each other; The locking unit includes a locking component, an elastic element, and a limiting component. The locking component is rotatably connected to the first rail. Each end of the locking component has a locking part, and the two locking parts protrude toward the sides of the locking component. The rotation center of the locking component is located between the two locking parts. The elastic element is provided on the locking component and provides it with rotational elastic force. The limiting component is disposed on the second rail, and the limiting component has a through unlocking channel along the sliding direction of the first rail; In the first active state and the second active state, the locking component is restricted to the locking form by the limiting part of the locking component. The locking component is located on one side of the limiting component and is offset from the unlocking channel in the length direction of the first rail. When switching to the locked state, the locking part located at the front end of the movement direction abuts against one end of the limiting component and is guided by the first guide part provided on at least one of the adjacent ends to overcome the elastic force and drive the locking component to rotate to be opposite to the unlocking channel, so that the locking component enters the unlocking channel. When the locking part located at the front end of the movement direction extends out of the unlocking channel, the locking component rotates by the elastic force to elastically abut against the limiting component, and the locking part rotates to be misaligned with the unlocking channel. The two locking parts are respectively located on both sides of the limiting component and respectively cooperate with the two ends of the limiting component to restrict the locking component from moving in the directions of the first active state and the second active state, so as to restrict the locking component in the locked state. The unlocking unit is driven to the locking component and is used to overcome the elastic force to rotate the locking component to an unlocking state opposite to the unlocking channel, so that it can pass through the unlocking channel.

2. The locking structure according to claim 1, characterized in that, The first guide portion is located on the outer end of the locking portion.

3. The locking structure according to claim 2, characterized in that, The locking part is a locking protrusion, and the first guiding part is a first guiding surface, which is disposed on the outer end of the locking protrusion. When switching to the locked state, the first guide surface on the locking protrusion located at the front end of the movement direction abuts against one end of the limiting component and overcomes the elastic force to guide and drive the locking component to rotate to be opposite to the unlocking channel.

4. The locking structure according to claim 1, characterized in that, The limiting component includes a first limiting block and a second limiting block. The first limiting block and the second limiting block are spaced apart along the length direction of the second rail and also spaced apart along the width direction of the second rail. The unlocking channel is located between the first limiting block and the second limiting block in the width direction of the second rail and extends obliquely from the first limiting block to the second limiting block. The two locking parts are a first locking part and a second locking part, the first locking part and the first limiting block are located on the same side, and the second locking part and the second limiting block are located on the same side; and in the direction in which the first rail slides toward the second active state, the first limiting block and the first locking part are both located at the front end, and the second limiting block and the second locking part are both located at the rear end; When switching from the first active state to the locked state, the first locking part abuts against the first limiting block and rotates to be opposite the unlocking channel under the guidance of the first guide part; When switching from the second active state to the locked state, the second locking part abuts against the second limiting block and rotates to be opposite the unlocking channel under the guidance of the first guide part; When in the locked state, the first locking part cooperates with the first limiting block to restrict the locking component from moving toward the first active state direction, and the second locking part cooperates with the second limiting block to restrict the locking component from moving toward the second active state direction.

5. The locking structure according to claim 1, characterized in that, When in the first active state, the first rail is slidably connected to the second rail; when in the second active state, the first rail can be detached from the second rail. When the first track slides from the first active state toward the locked state, the locking part located at the front end of the movement direction abuts against the limiting component and is rotated by the guidance of the first guide part, so that the locking part located at the front end of the movement direction rotates to be opposite to the unlocking channel and can pass through the unlocking channel, while the locking part located at the rear end of the movement direction is misaligned with the unlocking channel.

6. The locking structure according to claim 1 or 5, characterized in that, When in the first active state, the first rail is slidably connected to the second rail; when in the second active state, the first rail can be detached from the second rail. The distance between the rotation center of the locking component and the locking part that cooperates with the limiting component to restrict the movement of the locking component toward the second active state direction is less than the distance between the locking component and the other locking part.

7. The locking structure according to claim 1, characterized in that, The unlocking unit includes an unlocking component, which is slidably connected to the first rail along its length. The unlocking component is provided with a second guide portion. When the unlocking component slides relative to the first rail, it is driven and guided by the second guide portion to overcome the elastic force and drive the locking component to rotate to the unlocked state.

8. The locking structure according to claim 7, characterized in that, The first track is provided with a stop portion, which blocks the unlocking member to limit its sliding position in the opposite direction to the unlocking direction of the locking component; The locking limit part is disposed on the unlocking member, and the locking limit part is the second guide part. In the first active state and the second active state, the locking component abuts against the second guide part by the elastic force of the elastic member, and the locking component transmits the force to the unlocking member and the stop part in sequence through the second guide part.

9. The locking structure according to claim 8, characterized in that, A blocking part is provided on the unlocking member near the second guide portion or on the second guide portion; When the unlocking member, guided by the second guide portion, rotates the locking component to the unlocked state, the blocking portion limits the locking component.

10. The locking structure according to claim 9, characterized in that, The unlocking unit includes an adapter, which protrudes from one side of the locking component; The unlocking component has a connecting groove at one end near the locking component. The second guide portion is a second guide surface, which is located on the groove wall of the connecting groove near the locking component. The adapter is located in the connecting groove and abuts against the second guide surface by the elastic force of the elastic member. The blocking part is located near the second guide surface of the unlocking member, and the blocking part is a blocking surface, which is located on the groove wall adjacent to the second guide surface of the connecting groove.

11. The locking structure according to claim 7, characterized in that, The locking limit part is located on the first rail.

12. The locking structure according to claim 11, characterized in that, The locking limiting part is an arc-shaped limiting part, and the two ends of the arc-shaped limiting part are limiting ends. The center of the arc-shaped limiting part coincides with the rotation center of the locking component. One end of the locking component is movably connected to the arc-shaped limiting part. When the locking component rotates, one end of it can move on the arc-shaped limiting part. In the first active state and the second active state, the locking component abuts against the limiting end at one end by the elastic force of the elastic element; When the unlocking member, guided by the second guide portion, rotates the locking component to the unlocked state, the limiting end at the other end limits the locking component.

13. The locking structure according to claim 12, characterized in that, The arc-shaped limiting part is an arc-shaped groove, and the limiting ends at both ends are the groove walls at both ends of the arc-shaped groove; The unlocking unit includes an adapter, which is disposed at one end of the locking component and protrudes from one surface of the locking component, and is located within the arc-shaped groove.

14. A slide rail, characterized in that, Includes the locking structure as described in any one of claims 1 to 13.

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