Latching mechanism and switchgear

Abstract

The application discloses a locking mechanism and a switch electric appliance. The locking mechanism comprises a locking rod, a locking rod body, a locking part and a linkage structure connected to both ends of the locking rod body. The locking part is connected to the end of the locking rod body by bending, and a matching space for locking matching is formed between the locking part and the locking rod body. The linkage structure is used for rotating matching with the fixed base of the locking rod. A driving rod is fixedly connected to the locking rod body and is arranged at intervals from the locking part. The driving rod comprises a driving rod body and at least two movable connecting parts arranged at intervals on the driving rod body. The at least two movable connecting parts are used for movably connecting with different overcurrent protection structures. The locking mechanism and the switch electric appliance have simple overall structure, small occupied space, and can ensure the safety and reliability of the switch electric appliance as a whole.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, and in particular relates to a locking mechanism and a switch. Background Technology

[0002] Switching devices serve the functions of isolation and connection in circuits, primarily through the opening and closing of contacts. However, switching devices need to do more than just simple interruption; they also need to trip and disconnect promptly under overcurrent conditions to provide circuit protection.

[0003] Switchgear typically incorporates overcurrent protection mechanisms. These mechanisms trip the contacts and locking elements when excessive current is present, thus breaking the circuit and protecting the circuit. However, to achieve the locking function and coordination with the overcurrent protection mechanism, current locking elements are usually composed of multiple complex mechanisms. These components occupy a significant amount of space within the switchgear, affecting contact movement and arc-extinguishing chamber arrangement. Furthermore, they cannot meet the dielectric requirements for high-voltage applications, impacting the overall safety and reliability of the switchgear. Utility Model Content

[0004] This application provides a locking mechanism and a switching device, which has a simple overall structure, occupies little space, and can ensure the overall safety and reliability of the switching device.

[0005] This application provides a locking mechanism, comprising a locking rod, a locking rod body, locking portions connected to both ends of the locking rod body, and a linkage structure. The locking portions are bent and connected to the ends of the locking rod body, and the locking portions and the locking rod body enclose a mating space for locking engagement. The linkage structure is used for rotational engagement with the fixed base of the locking rod. A drive rod is fixedly connected to the locking rod body and spaced apart from the locking portions. The drive rod includes a drive rod body and at least two movable connecting portions spaced apart from the drive rod body. The at least two movable connecting portions are used for movable connection with different overcurrent protection structures.

[0006] In the above-described locking mechanism, at least two movable connecting parts include movable connecting holes and abutting parts. The abutting parts have abutting surfaces perpendicular to the rotation direction of the locking mechanism to abut against an overcurrent protection structure facing the abutting surface. The opening direction of the movable connecting holes is perpendicular to the rotation direction of the locking mechanism to rotate with an overcurrent protection structure facing away from the abutting surface.

[0007] In the above-mentioned locking mechanism, the abutment part is located at one end of the drive rod, the locking rod is connected to the other end of the drive rod, and the movable connecting hole is located between the abutment part and the locking rod, and is spaced apart from both the abutment part and the locking rod.

[0008] In the above-described locking mechanism, the locking rod has a first limiting surface facing the mating space, and the locking part has a second limiting surface facing the mating space. The angle between the first limiting surface and the second limiting surface is an acute angle.

[0009] The locking mechanism described above also includes a limiting connecting surface, which is connected between the first limiting surface and the second limiting surface, and the limiting connecting surface is an arc surface.

[0010] In the above-mentioned locking mechanism, the locking part also has an impact limiting surface, which is connected to the side of the second limiting surface away from the first limiting surface, and the angle between the impact limiting surface and the second limiting surface is an obtuse angle.

[0011] In the above-mentioned locking mechanism, the locking part also has a travel limiting surface, which is connected to the side of the impact limiting surface away from the second limiting surface and is connected to the impact limiting surface at an intersecting angle. The extension length of the travel limiting surface is greater than the extension length of the impact limiting surface.

[0012] The locking mechanism described above includes a linkage structure comprising a rotating connection part and a linkage connection part connected to each other. The rotating connection part is connected to the end of the locking rod and has a cylindrical structure for rotating engagement with the fixed foundation. The linkage connection part protrudes from the outer circumferential surface of the rotating connection part and is located on the side of the rotating connection part opposite to the drive rod, for multi-stage linkage engagement with different locking mechanisms.

[0013] The locking mechanism described above further includes an elastic reset member, which is installed on the side of the locking rod facing away from the drive rod and is located between the drive rod and the locking part.

[0014] On the other hand, this application embodiment also provides a switching device, which includes the above-mentioned locking mechanism. The switching device also includes a housing assembly and a contact assembly, an arc extinguishing assembly, and an overcurrent protection assembly disposed within the housing assembly. The locking mechanism is rotatably connected to the housing assembly through a linkage structure. The contact assembly has a locking shaft, which is a protruding shaft structure adapted to the mating space of the locking rod. The overcurrent protection assembly is movablely mated with the contact assembly through the locking mechanism.

[0015] The locking mechanism of this application embodiment includes a locking rod and a drive rod that are fixedly connected. The locking mechanism is rotatably mounted on a fixed base through the linkage structure of the locking rod. With the active cooperation of the overcurrent protection structure and the movable connection part, the drive rod as a whole can drive the locking rod to rotate around the linkage structure as the center, so as to realize the locking and unlocking cooperation between the locking shaft of the contact assembly and the cooperation space, thus realizing the locking function and the cooperation function with the overcurrent protection structure.

[0016] Because the locking rod and the drive rod are fixedly connected to form an integral structure, and the drive rod has at least two movable connecting parts, it can be movably connected to different overcurrent protection structures. There is no need to set up multiple drive rods or drive structures connected to the locking rod to adapt to overcurrent protection structures of different current levels. The overall structure is simple, occupies less space, and can ensure the overall safety and reliability of the switchgear. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the locking mechanism according to an embodiment of this application; Figure 2 This is a schematic diagram of the locking mechanism from another angle according to an embodiment of this application; Figure 3 This is a schematic diagram of the locking part of the locking mechanism in an embodiment of this application; Figure 4 This is a schematic diagram of the locking mechanism and locking shaft in a disengaged state according to an embodiment of this application; Figure 5 This is a schematic diagram of the locking mechanism and locking shaft in the locking state according to an embodiment of this application; Figure 6 This is a schematic diagram illustrating the cooperation between the locking mechanism and the linkage shaft in an embodiment of this application; Figure 7 This is a schematic diagram illustrating the cooperation of the multi-pole locking mechanism in a switching appliance according to an embodiment of this application; Figure 8 This is an exploded view of another locking mechanism according to an embodiment of this application; Figure 9 This is an assembly diagram of another locking mechanism according to an embodiment of this application; Figure 10 This is a schematic diagram illustrating the installation of another locking mechanism in a switching device according to an embodiment of this application; Figure 11 for Figure 10 Enlarged view of point A in the middle; Figure 12 This is a schematic diagram of the internal structure of the switching device according to an embodiment of this application from a frontal view. Figure 13 This is a schematic diagram of the internal structure of the switching device according to an embodiment of this application from a rear view perspective; Figure 14 This is a schematic diagram of the open state of the switching device according to an embodiment of this application; Figure 15 This is a schematic diagram of the closed state of the switching device according to an embodiment of this application; Figure 16 This is a schematic diagram illustrating the cooperation between the overcurrent protection component and the locking mechanism of the switching device according to an embodiment of this application; Figure 17 This is an exploded view of the switching device according to an embodiment of this application; Figure 18 This is a top view schematic diagram of the switching device according to an embodiment of this application; Figure 19 This is a schematic diagram of the independent structures of the contact assembly, overcurrent protection assembly, and locking mechanism of the switching device according to an embodiment of this application; Figure 20 This is a schematic diagram illustrating the interaction between the arc-extinguishing grid and the insulating partition of the switching device according to an embodiment of this application. Figure 21 This is a schematic diagram of the receiving groove of the arc-extinguishing grid plate of the switching device according to an embodiment of this application; Figure 22 This is a schematic diagram of the internal structure of another switching device according to an embodiment of this application; Figure 23 This is a schematic diagram of the internal structure of another arc-extinguishing component of a switching device according to an embodiment of this application.

[0019] Explanation of icon numbers: 1. Housing assembly; 11. Mounting base; 111. Partition plate; 112. Guide hole; 113. Mating hole; 12. Base; 13. Cover; 2. Contact assembly; 21. Moving contact; 211. Contact shaft; 22. Stationary contact; 23. Locking shaft; 24. Drive mechanism; 3. Arc extinguishing assembly; 31. Arc extinguishing grid plate; 31a. Receiving groove; 311. First grid plate; 312. Second grid plate; 32. Insulating partition; 321. Insulating main body; 322. First insulating part; 323. Second insulating part; 4. Overcurrent protection component; 41. Magnetic protection component; 411. Magnetic drive end; 42. Metal protection component; 421. Metal drive component; 422. Transmission connector; 4221. First transmission connecting rod; 4222. Main transmission connecting rod; 4223. Second transmission connecting rod; 423. Active adjustment component; 424. Auxiliary adjustment component; 4241. Adjusting plate; 4242. Connecting plate; 5. Locking mechanism; 51. Locking rod; 51a. Mating space; 511. Locking rod body; 5111. First limiting surface; 512. Locking part; 5121. Second limiting surface; 5122. Limiting connection surface; 5123. Impact limiting surface; 5124. Travel limiting surface; 513. Linkage structure; 5131. Rotating connection part; 5132. Linkage connection part; 5133. Spring mounting part; 52. Drive rod; 521. Drive rod body; 522. Movable connecting part; 5221. Movable connecting hole; 5222. Abutting part; 5222a. Abutting surface; 53. Elastic reset component; 531. Spring body; 532. Spring pin; 54. Linkage shaft. Detailed Implementation

[0020] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0021] like Figures 1 to 7 As shown, this application embodiment provides a locking mechanism, which includes a locking rod 51, including a locking rod body 511 and locking portions 512 and a linkage structure 513 connected to both ends of the locking rod body 511. The locking portions 512 are bent and connected to the ends of the locking rod body 511, and the locking portions 512 and the locking rod body 511 enclose a mating space 51a for locking engagement. The linkage structure 513 is used for rotational engagement with the fixed base of the locking rod 51. A drive rod 52 is fixedly connected to the locking rod body 511 and spaced apart from the locking portions 512. The drive rod 52 includes a drive rod body 521 and at least two movable connecting portions 522 spaced apart from the drive rod body 521. The at least two movable connecting portions 522 are used for movable connection with different overcurrent protection structures.

[0022] In specific implementation, the locking mechanism includes a locking rod 51 and a drive rod 52 that are fixedly connected. The locking mechanism is rotatably mounted on a fixed base through the linkage structure 513 of the locking rod 51. With the active cooperation of the overcurrent protection structure and the movable connection part 522, the drive rod 52 as a whole can drive the locking rod 51 to rotate around the linkage structure 513, so as to realize the locking and unlocking cooperation between the locking shaft 23 of the contact assembly 2 and the cooperation space 51a, thus realizing the locking function and the cooperation function with the overcurrent protection structure.

[0023] Since the locking rod 51 and the drive rod 52 are fixedly connected to form an integral structure, and the drive rod 52 has at least two movable connecting parts 522 integrated on it, it can be movably connected to different overcurrent protection structures. There is no need to set up multiple drive rods 52 or drive structures connected to the locking rod 51 to adapt to overcurrent protection structures of different current levels. The overall structure is simple, occupies less space, and can ensure the overall safety and reliability of the switchgear.

[0024] It should be noted that the locking mechanism 5 in this embodiment is installed inside the switchgear and is used to work in conjunction with the contact assembly 2 and the overcurrent protection assembly 4 of the switchgear. This allows the overcurrent protection assembly 4 to drive the locking mechanism 5 to trip when the switchgear is in an overcurrent state, thereby causing the locking mechanism 5 to open the contact assembly 2 and achieving the protection effect for the switchgear. The overcurrent protection assembly 4 includes at least two overcurrent protection structures, corresponding to at least two movable connection parts 522, which can drive the locking mechanism 5 to perform corresponding actions at different current levels. Furthermore, when the switchgear is in a normal conducting or normally disconnected state, the locking mechanism 5 can lock with the contact assembly 2, thereby fixing the locking mechanism 5 and the contact assembly 2 relatively, ensuring the stable closing or opening of the contact assembly 2.

[0025] like Figure 1 and Figure 2 As shown in the embodiment of the present application, the locking mechanism includes at least two movable connecting portions 522, each comprising a movable connecting hole 5221 and an abutting portion 5222. The abutting portion 5222 has an abutting surface 5222a perpendicular to the rotation direction of the locking mechanism 5, for abutting and cooperating with an overcurrent protection structure facing the abutting surface 5222a. The opening direction of the movable connecting hole 5221 is perpendicular to the rotation direction of the locking mechanism 5, for rotating and cooperating with an overcurrent protection structure facing away from the abutting surface 5222a.

[0026] In specific implementation, the contact surface 5222a of the contact part 5222 is perpendicular to the rotation direction of the locking mechanism 5. The overcurrent protection structure facing the contact surface 5222a can move in the direction facing the contact surface 5222a and engage with the contact surface 5222a to push the locking mechanism 5 to rotate as a whole, thereby realizing the release operation of the locking mechanism 5. The opening direction of the movable connecting hole 5221 is perpendicular to the rotation direction of the locking mechanism 5. The overcurrent protection structure facing away from the contact surface 5222a, through its rotational engagement with the movable connecting hole 5221, drives the locking mechanism 5 to move together, so that the locking mechanism 5 can rotate around the linkage structure 513 as the center, thereby also realizing the release operation of the locking mechanism 5. Therefore, by providing the movable connection hole 5221 and the abutment part 5222, the overcurrent protection structures on both sides of the locking mechanism 5 can drive the locking mechanism 5 to rotate in the same direction, that is, drive the locking mechanism 5 to rotate in the direction of its release. Furthermore, the movable connection hole 5221 and the abutment part 5222 are both integrated on the drive rod body 521, which makes the overall structure of the locking mechanism 5 simple, occupies less space, and at the same time ensures the overall safety and reliability of the switchgear.

[0027] In some optional embodiments, the movable connection part 522 can be configured as a movable connection hole 5221. At least two movable connection holes 5221 are spaced apart on the drive rod body 521. The overcurrent protection structure located at different positions can rotate with different movable connection holes 5221, thereby controlling the locking mechanism 5 to rotate separately, so as to realize the action of each overcurrent protection structure independently driving the locking mechanism 5 to release.

[0028] like Figure 1 and Figure 2 As shown in the embodiment of the present application, the locking mechanism has an abutment portion 5222 disposed at one end of the drive rod body 521, a locking rod 51 connected to the other end of the drive rod body 521, and a movable connecting hole 5221 disposed between the abutment portion 5222 and the locking rod 51, and is spaced apart from both the abutment portion 5222 and the locking rod 51.

[0029] In specific implementation, the abutment part 5222 is located at the end of the drive rod 521 that is far from the locking rod 51. It is far from the linkage structure 513 of the locking rod 51, that is, far from the rotation center of the entire locking mechanism 5. When the overcurrent protection structure drives the locking mechanism 5 to rotate through the abutment part 5222, the required driving force is small, which makes it easier for the overcurrent protection structure to drive the locking mechanism 5 to release, reducing the operational difficulty of the release action. At the same time, there is no need to make special designs for the overcurrent protection structure to meet the driving force requirements.

[0030] The movable connection hole 5221 is located between the abutment part 5222 and the locking rod 51, and is spaced apart from both the abutment part 5222 and the locking rod 51. When different overcurrent protection structures perform tripping operations through the movable connection hole 5221 and the abutment part 5222 respectively, mutual interference can be avoided, which would prevent the tripping action from being completed.

[0031] In the embodiments of this application, since the movable connection hole 5221 can rotatably engage with the overcurrent protection structure, the rotatable connection method is more stable. The movable connection hole 5221 is located between the abutment portion 5222 and the locking rod 51. Compared to the abutment portion 5222 at the end, the movable connection hole 5221 requires a larger driving force to drive the entire locking mechanism 5 to rotate. Therefore, the stable rotatable connection method avoids connection failure and drive failure due to excessive driving force, thereby ensuring the stability of the release action.

[0032] In some alternative embodiments, the movable connection hole 5221 can be located at the end of the drive rod 521 away from the locking rod 51, and the abutment portion 5222 is located between the movable connection hole 5221 and the locking rod 51, which can also achieve the connection effect with different overcurrent protection structures. It should be noted that the positions of the movable connection hole 5221 and the abutment portion 5222 can be arbitrarily set, as long as they are spaced apart to avoid mutual interference.

[0033] like Figure 3 and Figure 4 As shown in the embodiment of the present application, the locking mechanism has a locking rod 511 having a first limiting surface 5111 facing the mating space 51a, and a locking part 512 having a second limiting surface 5121 facing the mating space 51a. The included angle between the first limiting surface 5111 and the second limiting surface 5121 is an acute angle.

[0034] In specific implementation, the first limiting surface 5111 of the locking rod 511, the second limiting surface 5121 of the locking part 512, and the surface of the driving rod 521 facing the mating space 51a together form the mating space 51a. When the locking shaft 23 of the contact assembly 2 is located in the mating space 51a, the first limiting surface 5111 and the second limiting surface 5121, which have an acute angle, can clamp the locking shaft 23, thereby fixing the locking shaft 23 in the mating space 51a and realizing the locking engagement between the contact assembly 2 and the locking mechanism 5. Therefore, the angle between the first limiting surface 5111 and the second limiting surface 5121 ensures the stability of the engagement between the contact assembly 2 and the locking mechanism 5.

[0035] Specifically, the angle between the first limiting surface 5111 and the surface of the drive rod 521 facing the mating space 51a is a right angle. This angle setting makes the resistance encountered by the locking shaft 23 during the process of entering the mating space 51a smaller, reducing the difficulty of locking.

[0036] Optionally, the angle between the first limiting surface 5111 and the surface of the drive rod 521 facing the mating space 51a is an acute angle. This angle setting makes the locking engagement more stable after the locking shaft 23 enters the mating space 51a to lock, thus achieving a tight locking connection.

[0037] like Figure 3 and Figure 4 As shown in the embodiment of the present application, the locking mechanism includes a locking part 512 that further has a limiting connecting surface 5122. The limiting connecting surface 5122 is connected between the first limiting surface 5111 and the second limiting surface 5121, and the limiting connecting surface 5122 is an arc surface.

[0038] In specific implementation, the limiting connection surface 5122 of the locking part 512 is connected between the first limiting surface 5111 and the second limiting surface 5121, which increases the clamping space of the first limiting surface 5111 and the second limiting surface 5121 for the locking shaft 23, thereby ensuring the clamping stability of the locking shaft 23 and avoiding the situation where the locking shaft 23 falls off due to insufficient clamping space, thus ensuring the stability of the cooperation between the contact assembly 2 and the locking mechanism 5.

[0039] The limiting connection surface 5122 is an arc surface, which can fit against the outer peripheral surface of the locking shaft 23, increasing the friction between the locking shaft 23 and making the locking shaft 23 more stably clamped between the first limiting surface 5111 and the second limiting surface 5121, further improving the cooperation stability between the contact assembly 2 and the locking mechanism 5.

[0040] In some optional embodiments, the first limiting surface 5111 and the second limiting surface 5121 can be directly connected at a preset angle, which also has the effect of limiting and fixing the locking shaft 23.

[0041] like Figure 3 and Figure 4 As shown in the embodiment of the present application, the locking mechanism includes a locking part 512 that further has an impact limiting surface 5123. The impact limiting surface 5123 is connected to the side of the second limiting surface 5121 that is away from the first limiting surface 5111, and the angle between the impact limiting surface 5123 and the second limiting surface 5121 is an obtuse angle.

[0042] In practice, the impact limiting surface 5123 is connected to the side of the second limiting surface 5121 that is away from the first limiting surface 5111. During the transition from the locking state to the disengaging state between the contact assembly 2 and the locking mechanism 5, the locking shaft 23 slides relative to the second limiting surface 5121 and gradually slides to the disengagement space 51a. After completely disengaging from the engagement space 51a, the locking shaft 23 loses the support effect of the first limiting surface 5111 and the second limiting surface 5121 and impacts the impact limiting surface 5123, thereby preventing the locking shaft 23 from disengaging from the locking mechanism 5. Therefore, the impact limiting surface 5123 can limit the disengagement of the locking shaft 23, preventing the locking shaft 23 from completely disengaging from the locking mechanism 5 in the disengaging state, which would make it difficult to reset the locking mechanism.

[0043] Furthermore, the angle between the impact limiting surface 5123 and the second limiting surface 5121 is an obtuse angle, which allows the locking shaft 23 to have sufficient distance from the impact limiting surface 5123 after disengaging from the mating space 51a, so as to generate a large impact force and thus provide sufficient driving force. This enables the locking mechanism 5 of this pole in the switchgear to drive the locking mechanisms 5 of other poles in the switchgear to move together, realizing the linkage setting of multiple poles, thereby controlling the multi-pole switchgear to achieve a stable opening effect.

[0044] like Figure 3 and Figure 4 As shown in the embodiment of the present application, the locking mechanism includes a locking part 512 that further has a travel limiting surface 5124. The travel limiting surface 5124 is connected to the side of the impact limiting surface 5123 that is away from the second limiting surface 5121 and is connected to the impact limiting surface 5123 at an intersecting angle. The extension length of the travel limiting surface 5124 is greater than the extension length of the impact limiting surface 5123.

[0045] In specific implementation, the travel limiting surface 5124 of the locking part 512 is connected to the side of the impact limiting surface 5123 away from the second limiting surface 5121. After the locking shaft 23 impacts the impact limiting surface 5123 and continues to roll along the extension direction of the impact limiting surface 5123, it can roll to the travel limiting surface 5124. The travel limiting surface 5124 provides rolling space for the locking shaft 23 to continue rolling, thereby further avoiding the situation where the locking shaft 23 moves to disengage from the locking mechanism 5, which would make it inconvenient to reset the locking mechanism.

[0046] The extension length of the travel limiting surface 5124 is greater than the extension length of the impact limiting surface 5123, thereby providing sufficient rolling space for the rolling of the locking shaft 23 and enabling it to withstand a larger range of rolling distances.

[0047] like Figure 1 and Figure 2As shown in the embodiment of this application, the locking mechanism includes a linkage structure 513 comprising a rotating connection portion 5131 and a linkage connection portion 5132 connected to each other. The rotating connection portion 5131 is connected to the end of the locking rod body 511 and has a cylindrical structure for rotating engagement with the fixed foundation. The linkage connection portion 5132 protrudes from the outer peripheral surface of the rotating connection portion 5131 and is located on the side of the rotating connection portion 5131 facing away from the drive rod 52, for multi-stage linkage engagement with different locking mechanisms 5.

[0048] In specific implementation, the cylindrical rotating connection part 5131 is connected to the end of the locking rod 511, and it can rotate with the housing assembly 1, which serves as the fixed base. When the locking mechanism rotates as a whole, it can rotate with the rotating connection part 5131 at the end of the locking rod 511 as the rotation center.

[0049] The linkage connection part 5132 protrudes from the outer peripheral surface of the rotating connection part 5131 and is located on the side of the rotating connection part 5131 facing away from the drive rod 52. When connected with the locking mechanism 5 of different poles, it can avoid interference with the drive rod 52.

[0050] And, as Figure 6 and Figure 7 As shown, the locking mechanism also has a linkage shaft 54, which extends along the multi-pole structure arrangement direction of the switchgear and passes through multiple linkage connection parts 5132 to realize the multi-pole linkage setting of the switchgear, thereby controlling the multi-pole switchgear to achieve a stable opening effect.

[0051] like Figure 3 As shown in the embodiment of this application, the locking mechanism further includes an elastic reset member 53, which is installed on the side of the locking rod 511 facing away from the driving rod 52, and is disposed between the driving rod 52 and the locking part 512.

[0052] In specific implementation, such as Figure 4 As shown, after the locking mechanism 5 is fully disengaged and the contact assembly 2 is in the open state, the elastic force accumulated by the elastic reset member 53 during the disengagement process can drive the locking mechanism 5 to continue sliding relative to the locking shaft 23 of the contact assembly 2; as Figure 5 As shown, the locking shaft 23 enters the mating space 51a, realizing the reset effect of the locking engagement between the contact assembly 2 and the locking mechanism 5, thereby maintaining the open state of the contact assembly 2.

[0053] like Figure 3As shown, the elastic reset member 53 is installed on the side of the locking rod 511 facing away from the driving rod 52, thus avoiding interference between the elastic reset member 53 and the locking shaft 23, the driving rod 52, and the overcurrent protection structure when elastic deformation occurs. The elastic reset member 53 is located at the position between the driving rod 52 and the locking part 512, and is close to the mating space 51a, which can generate sufficient elastic force to achieve a stable reset effect.

[0054] Specifically, the elastic reset element 53 is a reset torsion spring, which can store and release elastic force by rotating, greatly reducing the overall space occupied. It also has a simple structure and can ensure the overall safety and reliability of the switchgear.

[0055] like Figures 8 to 11 As shown, in some optional embodiments, the linkage structure 513 further includes a spring mounting portion 5133, which is located between the rotating connection portion 5131 and the linkage connection portion 5132. The spring mounting portion 5133 has a cylindrical structure and is used to mount the elastic reset member 53, allowing the elastic reset member 53 to be mounted more stably, thereby enabling stable elastic reset action and achieving a stable reset effect. Furthermore, the linkage structure 513 in this embodiment can be applied to larger switching devices. Larger switching devices have a larger internal capacity, providing sufficient space for the more complex locking mechanism 5, thus achieving a more stable reset function.

[0056] The elastic reset component 53 includes a spring body 531 and a spring pin 532. The spring body 531 is installed in the spring mounting part 5133, and the spring pin 532 is fixed to the housing assembly 1 of the switch. The setting and installation of the spring pin 532 further improves the overall stable reset effect of the elastic reset component 53.

[0057] This application embodiment also provides a switching device, which includes the above-mentioned locking mechanism. The switching device also includes a housing assembly 1 and a contact assembly 2, an arc extinguishing assembly 3, and an overcurrent protection assembly 4 disposed within the housing assembly 1. The locking mechanism 5 is rotatably connected to the housing assembly 1 through a linkage structure 513. The contact assembly 2 has a locking shaft 23, which is a protruding shaft structure that is adapted to the mating space 51a of the locking rod 51. The overcurrent protection assembly 4 is movably mated with the contact assembly 2 through the locking mechanism 5.

[0058] In practical implementation, the overcurrent protection component 4 of the switchgear includes a magnetic protection component 41 and a metal protection component 42, which are respectively located on both sides of the locking mechanism 5, so that they can be movably engaged with the two movable connecting parts 522 respectively. The magnetic protection component 41 and the metal protection component 42 can complete the disconnection protection of the contact component 2 under different overload current levels. The locking rod 51 and the drive rod 52 of the locking mechanism 5 are fixedly connected, so that the switchgear does not need to be equipped with multiple drive rods 52 or drive structures connected to the locking rod 51 to adapt to the magnetic protection component 41 and the metal protection component 42 with different current levels. Therefore, the overall structure of the switchgear is simple, the overall size is small, and the overall safety and reliability can be guaranteed.

[0059] like Figures 12 to 21 As shown in the embodiment of this application, a switching device includes a housing assembly 1; a contact assembly 2 disposed within the housing assembly 1; an arc-extinguishing assembly 3 arranged along a first direction X within the housing assembly 1, the arc-extinguishing assembly 3 including a plurality of arc-extinguishing grids 31 spaced apart along a second direction Y, the plurality of arc-extinguishing grids 31 including a plurality of first grids 311 and a plurality of second grids 312, the plurality of first grids 311 being positioned opposite to the contact assembly 2 and protruding from the plurality of second grids 312 in the direction toward the contact assembly 2; and an overcurrent protection assembly 4 including a magnetic protection assembly 41 and a metal protection assembly 42 with different overload current levels, the magnetic protection assembly 41 and the metal protection assembly 42 being respectively disposed on both sides of the portion of the plurality of first grids 311 protruding from the plurality of second grids 312 in the second direction Y, and both being disposed between the contact assembly 2 and the plurality of second grids 312, so as to movably cooperate with the contact assembly 2; wherein the first direction X and the second direction Y intersect.

[0060] In specific implementation, the switching device of this application embodiment includes a housing assembly 1, a contact assembly 2, an arc-extinguishing assembly 3, and an overcurrent protection assembly 4. The contact assembly 2 and the arc-extinguishing assembly 3 of the switching device are installed in the housing assembly 1 along the first direction X. The arc-extinguishing grid plates 31 of the arc-extinguishing assembly 3 are arranged at intervals along the second direction Y. They can utilize the space in the housing assembly 1 in the second direction Y and will not interfere with the contact assembly 2, thereby ensuring that there are enough arc-extinguishing grid plates 31 to ensure the arc-extinguishing capability of the arc-extinguishing assembly 3, thereby ensuring the breaking effect. Moreover, the first grid plate 311 arranged opposite to the position of the contact assembly 2 is relatively long, which can further improve the overall arc-initiating and arc-extinguishing capability of the arc-extinguishing assembly 3, thereby further improving the breaking effect.

[0061] Furthermore, by only protruding the first grid plate 311, sufficient installation space can be reserved on both sides of the protruding portion of the first grid plate 311 in the second direction Y, so that the magnetic protection component 41 and the metal protection component 42 of the overcurrent protection component 4 can be disposed in the space on both sides of the multiple first grid plates 311, and the two can be disposed between the contact component 2 and the multiple second grid plates 312, so that the magnetic protection component 41 and the metal protection component 42 can be disposed adjacent to the contact component 2, achieving the effect of movable cooperation, so that the magnetic protection component 41 and the metal protection component 42 can complete the disconnection protection of the contact component 2 under different overload current levels, thereby ensuring sufficient overcurrent protection effect.

[0062] The magnetic protection component 41 and the metal protection component 42 are capable of overload protection under different levels of overload current. In this embodiment, the magnetic protection component 41 has a larger overload protection current; it drives the contact component 2 to open when the actual current reaches more than six times the rated current. The metal protection component 42 has a smaller overload protection current; it drives the contact component 2 to open only when the actual current reaches two to three times the rated current. Furthermore, since the metal protection component 42 is driven by metal deformation caused by increased current or temperature, it also has a delayed opening effect for smaller overload currents. It should be noted that the magnetic protection component 41 and the metal protection component 42 in this embodiment include, but are not limited to, the overload current levels described above.

[0063] like Figure 12 As shown in the embodiment of the present application, in the switching device, a plurality of second grid plates 312 are arranged in a stepped manner along the second direction Y, and along the direction away from the first grid plate 311, the spacing between the plurality of stepped second grid plates 312 and the contact assembly 2 is increasing. The metal protection component 42 extends along the direction intersecting the second direction Y, and is inclinedly arranged between the contact assembly 2 and the second grid plates 312.

[0064] In specific implementation, multiple second grid plates 312 are arranged in a stepped manner along the second direction Y. This is suitable for the trend of the arc gradually weakening from the middle to both ends of the arc extinguishing component 3. While ensuring sufficient arc extinguishing effect, it can also reduce the space occupied by the arc extinguishing component 3 in the housing component 1, thereby providing space for the arrangement of the overcurrent protection component 4.

[0065] The structure of multiple second grid plates 312 makes the spacing between the multiple stepped second grid plates 312 and the contact assembly 2 increase in the direction away from the first grid plate 311. The magnetic protection assembly 41 and the metal protection assembly 42 can be arranged in the inclined direction, so they can accommodate the magnetic protection assembly 41 and the metal protection assembly 42 with a long overall length and strong overcurrent breaking capacity, thereby ensuring the overcurrent breaking effect.

[0066] In this embodiment, the magnetic protection component 41 is a magnetic drive motor structure, arranged horizontally along the second direction Y to ensure the stability of its drive; the metal protection component 42 extends along the direction intersecting with the second direction Y to ensure that the metal protection component 42 can generate sufficient deformation, thereby realizing a complete tripping operation and further improving the tripping effect of overcurrent protection.

[0067] In this embodiment, the surfaces of the plurality of first grid plates 311 and the plurality of second grid plates 312 also have arc-inducing plates with the same arrangement shape as the plurality of first grid plates 311 and the plurality of second grid plates 312, so as to induce the electric arc generated by the contact assembly 2 to be extinguished between all the arc-extinguishing grid plates 31, thereby ensuring the overall arc-extinguishing effect.

[0068] like Figure 14 As shown in the embodiment of the present application, the switch appliance includes a contact assembly 2 comprising a moving contact 21 and a stationary contact 22 arranged and movably engaged along a second direction Y. A magnetic protection assembly 41 is disposed on the side near the stationary contact 22 and has a magnetic drive end 411 that is retractably disposed toward the moving contact 21. A metal protection assembly 42 is disposed on the side near the moving contact 21 and includes a metal drive member 421 and a transmission connector 422. The metal drive member 421 is deformably disposed along the direction of movement of the moving contact 21, and the transmission connector 422 is connected between the metal drive member 421 and the moving contact 21.

[0069] In specific implementation, the moving contact 21 and stationary contact 22 of the contact assembly 2 are arranged along the second direction Y and their ends are rotatably connected. The moving contact 21 is rotatable, allowing it to rotate until its moving contact point contacts and disconnects with the stationary contact point of the stationary contact 22, thereby achieving the overall conduction and disconnection effect of the switching device. The magnetic protection component 41 is located on the side near the stationary contact 22, and the metal protection component 42 is located on the side near the moving contact 21. Both are independently located in different spaces, thus avoiding interference between the magnetic drive end 411 of the magnetic protection component 41 during extension and retraction, and between the metal drive component 421 and the transmission connector 422 of the metal protection component 42 during deformation and transmission. Therefore, by making reasonable use of the internal space of the housing assembly 1, the independence of the overcurrent protection action is ensured, achieving independent overcurrent protection effects at different current levels.

[0070] In this embodiment, since the metal protection component 42 is located on the side close to the moving contact 21, and is positioned on the side of the moving contact 21 away from the stationary contact 22, in order to drive the moving contact 21 to rotate in a direction away from the stationary contact 22 to achieve the opening effect, the metal driving member 421 is deformably arranged along the movement direction of the moving contact 21, and then the transmission connector 422 is connected between the metal driving member 421 and the moving contact 21. The transmission connector 422 can transmit the deformation of the metal driving member 421 to the moving contact 21 to drive the moving contact 21 to rotate, thereby achieving the driving effect.

[0071] Specifically, the metal drive component 421 is an inclined metal sheet structure that can bend and deform when the current increases or the temperature rises. The transmission connector 422 includes a first transmission connector 4221, a main transmission connector 4222, and a second transmission connector 4223. The first transmission connector 4221 and the second transmission connector 4223 are bent and connected to the two ends of the main transmission connector 4222, and are respectively connected to the metal drive component 421 and the moving contact 21, so that the metal drive component 421 and the moving contact 21 can move synchronously, so that the moving contact 21 can move along the bending direction of the metal drive component 421 to achieve the opening effect.

[0072] Furthermore, when the metal drive member 421 is not deformed, the first transmission connecting rod 4221 is spaced apart from the metal drive member 421; after the metal drive member 421 is deformed, a part of the metal drive member 421 moves closer to the first transmission connecting rod 4221 until it abuts against the first transmission connecting rod 4221, and continues to deform, causing the first transmission connecting rod 4221 to shift.

[0073] In the switching device of this application embodiment, the metal driving member 421 includes a first metal sheet and a second metal sheet stacked together. The coefficient of expansion of the first metal sheet is smaller than that of the second metal sheet. The first metal sheet is connected to the side of the second metal sheet facing the transmission connector 422.

[0074] In specific implementation, the first metal sheet and the second metal sheet are stacked, and the expansion coefficient of the first metal sheet is smaller than that of the second metal sheet. When there is an overload current in the metal driving member 421, both the first metal sheet and the second metal sheet will expand, and the expansion deformation of the second metal sheet is larger than that of the first metal sheet, so that the metal driving member 421 as a whole bends toward the transmission connector 422, thereby achieving the effect of displacement driving of the transmission connector 422.

[0075] In some alternative implementations, multiple layers of metal sheets with gradually varying coefficients of expansion can be used to achieve the effect of expansion and bending.

[0076] like Figure 14 and Figure 17 As shown in the embodiment of the present application, the switchgear includes a housing assembly 1 containing an internal mounting base 11. The contact assembly 2 and the overcurrent protection assembly 4 are both movably mounted on the mounting base 11. The mounting base 11 includes a partition plate 111 perpendicular to the third direction Z. The partition plate 111 has a guide hole 112 extending along the movement direction of the moving contact 21. The metal drive member 421 and the transmission connector 422 of the metal protection assembly 42 are respectively disposed on both sides of the partition plate 111, and at least a portion of the transmission connector 422 is slidably inserted into the guide hole 112.

[0077] In specific implementation, the partition plate 111 of the mounting base 11 is set perpendicular to the third direction Z. The metal driving component 421 and the transmission connecting component 422 of the metal protection component 42 are respectively located on both sides of the partition plate 111. This prevents the metal driving component 421 from contacting the main transmission connecting rod 4222 of the transmission connecting component 422 when it deforms, thus avoiding the transmission connecting component 422 from moving axially towards the moving contact 21. Furthermore, the partition plate 111 also has a guide hole 112 extending along the active direction of the moving contact 21, so that the transmission connecting component 422 can only move along the extension direction of the guide hole 112 under the driving action of the metal driving component 421, that is, along the active direction of the moving contact 21, thus ensuring the opening stability of the moving contact 21.

[0078] Specifically, since the moving contact 21 is rotatably configured, the guide hole 112 is a straight hole structure that is tangent to the rotation trajectory of the moving contact 21.

[0079] Optionally, the guide hole 112 may extend along an arc, and the radius of the arc-shaped guide hole 112 is the same as the rotation radius of the moving contact 21.

[0080] In some alternative embodiments, such as Figure 22 and Figure 23 As shown, for different models of switchgear, the mounting base 11 is only used to install the contact assembly 2. The base 12 or cover 13 is provided with guide holes 112 and mating holes 113 for cooperating with the locking mechanism 5. This structure can simplify the internal structure of the switchgear while ensuring the overcurrent protection operation, and provide space for the arrangement of the arc extinguishing assembly 3 and the overcurrent protection assembly 4, thereby further improving the arc extinguishing effect and the stability of the overcurrent protection operation.

[0081] In this embodiment, the contact assembly 2 further includes a drive mechanism 24, which is disposed through the housing assembly 1 and is integrally mounted on the mounting base 11. The mounting base 11 and the arc extinguishing assembly 3 are spaced apart in the first direction X. The drive mechanism 24 is connected to the moving contact 21 and is used to drive the moving contact 21 to rotate.

[0082] In this embodiment, the housing assembly 1 further includes a base 12 and a cover 13. The base 12 and the cover 13 can be closed and connected to form an internal accommodating space in the closed state. The mounting base 11, the contact assembly 2, the arc extinguishing assembly 3, the overcurrent protection assembly 4, and the locking mechanism 5 are all disposed in the accommodating space, and the contact assembly 2 and the overcurrent protection assembly 4 are mounted on the mounting base 11.

[0083] like Figure 14 and Figure 19 As shown in the embodiment of the present application, the switching device includes a metal protection component 42 that further includes an active adjustment component 423 and an auxiliary adjustment component 424. The active adjustment component 423 is movably disposed in the housing component 1 along the second direction Y. The auxiliary adjustment component 424 includes a bent adjustment plate 4241 and a connecting plate 4242. The adjustment plate 4241 is parallel to the metal drive component 421 and connected to the metal drive component 421. The connecting plate 4242 is perpendicular to the second direction Y and abuts against the active adjustment component 423.

[0084] In specific implementation, the active adjustment member 423 is movably inserted into the housing assembly 1 along the second direction Y, thereby driving the auxiliary adjustment member 424 to move in the second direction Y. This, in turn, causes the metal drive member 421 to move in the second direction Y via the auxiliary adjustment member 424. The displacement adjustment of the metal drive member 421 in the second direction Y is suitable for use during the initial installation stage of the switchgear when the distance between the metal drive member 421 and the transmission connector 422 is too large or too small. The active adjustment member 423 and the auxiliary adjustment member 424 can adjust the position of the metal drive member 421 in the second direction Y to ensure a suitable distance between it and the transmission connector 422, thus enabling a driving effect on the transmission connector 422 through bending.

[0085] The auxiliary adjustment component 424 includes a bent adjustment plate 4241 and a connecting plate 4242. The adjustment plate 4241 is set parallel to the metal drive component 421, which facilitates direct connection between the adjustment plate 4241 and the metal drive component 421, ensuring the connection area between the two and thus ensuring adjustment accuracy and stability. At least a portion of the connecting plate 4242 is set perpendicular to the second direction Y. When the active adjustment component 423 moves along the second direction Y, it can make perpendicular contact with the connecting plate 4242, thereby achieving a stable pushing effect of the active adjustment component 423 on the connecting plate 4242 and avoiding relative sliding between the two.

[0086] like Figure 14 and Figure 19As shown in the embodiment of this application, the switching device further includes a locking mechanism 5, which is movably connected between the contact assembly 2 and the overcurrent protection assembly 4. The locking mechanism 5 includes a locking rod 51 and a driving rod 52. The locking rod 51 includes a locking rod body 511 and a locking part 512 bent and connected to the end of the locking rod body 511. The driving rod 52 is connected to the locking rod body 511. The locking rod body 511 and the locking part 512 form a mating space 51a for locking with the moving contact 21. The magnetic protection assembly 41 and the metal protection assembly 42 are both movably mated with the driving rod 52.

[0087] In specific implementation, the locking mechanism 5 includes a locking rod 51 and a drive rod 52 fixedly connected. The locking rod 51 engages with the moving contact 21 through the mating space 51a between its locking rod body 511 and the locking part 512. The magnetic protection component 41 and the metal protection component 42 are both movably engaged with the drive rod 52. Thus, the drive rod 52 drives the locking rod 51 to move, realizing the locking and unlocking engagement between the locking rod 51 and the moving contact 21, and realizing the locking function and the engagement function with the overcurrent protection component 4.

[0088] During the opening or closing process of the contact assembly 2 of the switching device, the locking mechanism 5 and the moving contact 21 engage in multiple locking and disengaging actions. Taking the overcurrent protection component 4 driving the contact assembly 2 to open as an example, in the initial closed state of the contact assembly 2, the locking mechanism 5 and the moving contact 21 are in a locked engagement state, and the locking shaft 23 of the moving contact 21 is completely within the engagement space 51a, allowing the moving contact 21 to be locked in the closed position with the stationary contact 22. During the process of the overcurrent protection component 4 driving the contact assembly 2 from closed to open, the locking shaft 23 of the moving contact 21 temporarily disengages from the engagement space 51a and abuts against other sides of the locking part 512. In the open state of the contact assembly 2, the locking shaft 23 of the moving contact 21 re-engages within the engagement space 51a, thereby causing the locking mechanism 5 and the moving contact 21 to be in a locked engagement state again, allowing the moving contact 21 to be locked in the open position with the stationary contact 22.

[0089] In this embodiment, the mounting base 11 also has a mating hole 113 for sliding and rotating connection of the locking mechanism 5. The locking mechanism 5 is slidably arranged along the extension direction of the mating hole 113, and the locking mechanism 5 can rotate within the mating hole 113, thereby realizing the locking engagement with the moving contact 21 of the contact assembly 2. The moving contact 21 is rotatably connected to the mounting base 11 through the contact shaft 211.

[0090] like Figure 14 and Figure 19As shown in the embodiment of the present application, in the switching electrical appliance, the end of the transmission connector 422 away from the metal drive member 421 is rotatably connected to the drive rod 52, and the magnetic drive end 411 of the magnetic protection component 41 is telescopically disposed toward the drive rod 52 so as to abut against the surface of the drive rod 52 facing away from the metal protection component 42.

[0091] In specific implementation, when the contact assembly 2 breaks, the moving contact 21 moves away from the stationary contact 22, thereby disconnecting the connection between the moving contact 21 and the stationary contact 22. The magnetic drive end 411 of the magnetic protection assembly 41 is retractably positioned toward the drive rod 52, so that when it contacts the drive rod 52, it pushes the entire locking mechanism 5 to rotate, causing the locking rod 51 of the locking mechanism 5 to drive the moving contact 21, which is engaged with it, to move away from the stationary contact 22, thus achieving the overcurrent protection effect of the magnetic protection assembly 41 for the contact assembly 2. Therefore, the magnetic protection assembly 41 is located on the side of the drive rod 52 facing away from the metal protection assembly 42 and can abut against this side surface. This position and engagement relationship makes the mechanism of the overcurrent protection assembly 4 and the locking mechanism 5 simpler, eliminating the need for further connection structures, reducing the complexity of the internal parts of the switchgear, and enabling the overall miniaturization of the switchgear.

[0092] The end of the transmission connector 422 furthest from the metal drive member 421 is rotatably connected to the drive rod 52. Since the transmission connector 422 moves in a straight line, it conflicts somewhat with the arc-shaped motion trajectory of the locking mechanism 5. This rotatable connection allows the linear motion of the transmission connector 422 to be converted into the arc-shaped motion of the locking mechanism 5, enabling the transmission and conversion of actions through direct engagement. This allows the metal protection component 42 to stably drive the moving contact 21, which is engaged with the locking mechanism 5, to move away from the stationary contact 22, thus achieving overcurrent protection for the contact assembly 2. Therefore, the connection and engagement method between the transmission connector 422 and the locking drive rod 52 of the metal protection component 42 also reduces the complexity of the internal parts of the switchgear, enabling a miniaturized overall design.

[0093] Specifically, the first transmission connecting rod 4221 and the second transmission connecting rod 4223 are respectively vertically connected to the two ends of the main transmission connecting rod 4222. The extension direction of the first transmission connecting rod 4221 is parallel to the plate-shaped metal driving member 421, so that the two can stably abut against each other. The extension direction of the second transmission connecting rod 4223 is perpendicular to the extension direction of the driving rod 52, so that the two can achieve stable rotational engagement.

[0094] like Figure 10As shown in the embodiment of the present application, each arc-extinguishing grid 31 has a receiving groove 31a. The receiving groove 31a is opened on the side of the arc-extinguishing grid 31 facing the contact assembly 2. At least a portion of the contact assembly 2 is located in the receiving groove 31a, and the contact assembly 2 performs opening and closing operations within the range of the multiple receiving grooves 31a of the multiple arc-extinguishing grids 31.

[0095] In practical implementation, the multiple receiving grooves 31a formed by the multiple arc-extinguishing grid plates 31 can form a channel for the moving contact 21 of the contact assembly 2 to rotate, allowing the moving contact 21 to rotate within the range of the multiple receiving grooves 31a to achieve contact and disconnection with the stationary contact 22. Therefore, the arrangement of the receiving grooves 31a allows the contact assembly 2 to be partially overlapped with the arc-extinguishing assembly 3 in the first direction X, further reducing the length of the switchgear in the first direction X. Furthermore, the contact assembly 2 can generate an electric arc inside the arc-extinguishing assembly 3, and most of the arc is directly extinguished by the arc-extinguishing assembly 3, improving the arc-extinguishing capability of the switchgear and thus improving the overall breaking capacity of the switchgear.

[0096] like Figure 20 As shown in the embodiment of the present application, the contact assembly 2 performs opening and closing operations in multiple receiving slots 31a of multiple first grid plates 311 and some second grid plates 312. The arc extinguishing assembly 3 also has an insulating partition 32, which covers the surface of multiple first grid plates 311 and is disposed to avoid the multiple receiving slots 31a.

[0097] In specific implementation, after the contact assembly 2 generates an electric arc in the receiving groove 31a corresponding to the plurality of first grid plates 311, since the surface of the plurality of first grid plates 311 is covered with an insulating partition 32, the insulating partition 32 can prevent the electric arc from flowing in the direction of the drive mechanism 24, thereby enabling the drive mechanism 24 to be insulated from the moving contact 21 and the stationary contact 22, increasing the electrical creepage distance and preventing the occurrence of breakdown.

[0098] The main range of motion of the moving contact 21 of the contact assembly 2 is within the receiving groove 31a of the first grid plate 311 and part of the receiving groove 31a of the second grid plate 312. The first grid plate 311 has a relatively long overall length, which facilitates its overlapping arrangement with the contact assembly 2, thereby achieving a better arc extinguishing effect. The part of the second grid plate 312 corresponds to the metal drive member 421. The tilting arrangement of the metal drive member 421 provides space for the movement of the moving contact 21, thereby lengthening the arc generated by the contact assembly 2 and making it easier for it to enter the corresponding first grid plate 311 for arc extinguishing, further improving the arc extinguishing effect. Therefore, the coordinated arrangement of the contact assembly 2 with the first grid plate 311, the second grid plate 312, and the metal drive member 421 in this embodiment not only ensures the requirement of miniaturization but also further improves the breaking effect of the switching device.

[0099] Specifically, the insulating partition 32 includes an insulating main body 321 and a first insulating part 322 and a second insulating part 323 connected to both sides of the insulating main body 321 in the second direction Y. The first insulating part 322 is located on the side of the insulating main body 321 facing the magnetic protection component 41 and protrudes in the second direction Y to achieve insulation between the arc extinguishing component 3 and the magnetic protection component 41. The second insulating part 323 is located on the side of the insulating main body 321 facing the metal protection component 42 and is inclined in the first direction X to achieve insulation between the arc extinguishing component 3 and the metal protection component 42. The insulating main body 321 surrounds the outer periphery of the overall structure of the plurality of first grid plates 311 to insulate the arc extinguishing component 3 from the drive mechanism 24. The structural configuration of the insulating partition 32 is adapted to the shape configuration of the arc extinguishing component 3 and the overcurrent protection component 4. In the case of a small internal space in the housing component 1, it can make reasonable use of space, ensure the insulation effect between different internal parts, reduce the probability of back-side breakdown, and improve the breaking capacity of the switching device.

[0100] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0101] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A locking mechanism, characterized in that, include: The locking rod (51) includes a locking rod body (511) and a locking part (512) and a linkage structure (513) connected to both ends of the locking rod body (511). The locking part (512) is bent and connected to the end of the locking rod body (511), and the locking part (512) and the locking rod body (511) enclose a mating space (51a) for locking engagement. The linkage structure (513) is used to rotate and engage with the fixed base of the locking rod (51). A drive rod (52) is fixedly connected to the latch rod body (511) and spaced apart from the latch part (512). The drive rod (52) includes a drive rod body (521) and at least two movable connecting parts (522) spaced apart from the drive rod body (521). The at least two movable connecting parts (522) are used to be movably connected to different overcurrent protection structures.

2. The locking mechanism according to claim 1, characterized in that, The at least two movable connecting parts (522) include a movable connecting hole (5221) and an abutting part (5222). The abutting part (5222) has an abutting surface (5222a) perpendicular to the rotation direction of the locking mechanism (5) so as to abut against the overcurrent protection structure on the side facing the abutting surface (5222a). The opening direction of the movable connecting hole (5221) is perpendicular to the rotation direction of the locking mechanism (5) so as to rotate with the overcurrent protection structure on the side facing away from the abutting surface (5222a).

3. The locking mechanism according to claim 2, characterized in that, The abutting part (5222) is located at one end of the driving rod body (521), the locking rod (51) is connected to the other end of the driving rod body (521), and the movable connecting hole (5221) is located between the abutting part (5222) and the locking rod (51), and is spaced apart from both the abutting part (5222) and the locking rod (51).

4. The locking mechanism according to any one of claims 1 to 3, characterized in that, The locking rod (511) has a first limiting surface (5111) facing the mating space (51a), and the locking part (512) has a second limiting surface (5121) facing the mating space (51a). The included angle between the first limiting surface (5111) and the second limiting surface (5121) is an acute angle.

5. The locking mechanism according to claim 4, characterized in that, The locking part (512) also has a limiting connecting surface (5122), which is connected between the first limiting surface (5111) and the second limiting surface (5121), and the limiting connecting surface (5122) is an arc surface.

6. The locking mechanism according to claim 4, characterized in that, The latch (512) also has an impact limiting surface (5123), which is connected to the side of the second limiting surface (5121) away from the first limiting surface (5111), and the angle between the impact limiting surface (5123) and the second limiting surface (5121) is an obtuse angle.

7. The locking mechanism according to claim 6, characterized in that, The locking part (512) also has a travel limiting surface (5124), which is connected to the side of the impact limiting surface (5123) away from the second limiting surface (5121) and is connected to the impact limiting surface (5123) at an intersecting angle. The extension length of the travel limiting surface (5124) is greater than the extension length of the impact limiting surface (5123).

8. The locking mechanism according to any one of claims 1 to 3, characterized in that, The linkage structure (513) includes a rotating connection part (5131) and a linkage connection part (5132) connected to each other. The rotating connection part (5131) is connected to the end of the locking rod body (511) and has a cylindrical structure for rotating cooperation with the fixed foundation. The linkage connection part (5132) protrudes from the outer peripheral surface of the rotating connection part (5131) and is located on the side of the rotating connection part (5131) facing away from the driving rod (52) for multi-level linkage cooperation with different locking mechanisms (5).

9. The locking mechanism according to any one of claims 1 to 3, characterized in that, The locking mechanism further includes: An elastic reset member (53) is installed on the side of the latch rod (511) facing away from the drive rod (52), and the elastic reset member (53) is located between the drive rod (52) and the latch part (512).

10. A switching device, characterized in that, The switching device includes a locking mechanism as described in any one of claims 1 to 9, and further includes a housing assembly (1) and a contact assembly (2), an arc extinguishing assembly (3) and an overcurrent protection assembly (4) disposed within the housing assembly (1). The locking mechanism (5) is rotatably connected to the housing assembly (1) via a linkage structure (513). The contact assembly (2) has a locking shaft (23). The locking shaft (23) has a protruding shaft structure and is adapted to the mating space (51a) of the locking rod (51). The overcurrent protection assembly (4) is movably mated with the contact assembly (2) via the locking mechanism (5).

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