Pull-locking structure of circuit breaker and plug-in circuit breaker

Abstract

The present invention includes a cover plate that can be stored. When removing the circuit breaker, the cover plate is opened and the second drive portion of the cover plate releases the locking mechanism. Then, the operating portion after the cover plate is opened applies a pulling force or cooperates with a removal tool to pull the circuit breaker. This has the advantages of a simple structure, high stability, and convenient pulling compared to the existing method of pulling the circuit breaker through the button portion. 【Solution means】The pulling and locking structure of the circuit breaker includes a housing of the circuit breaker, a handle mechanism rotatably attached to the operating end of the housing, and an operating mechanism and a locking mechanism provided inside the housing. The handle mechanism drives the circuit breaker to perform switching-off and switching-on operations in conjunction with the operating mechanism. The structure further includes a cover plate rotatably connected to the housing. An operating portion and a second drive portion are provided on the cover plate. The cover plate rotates between a storage position and an open position. When the cover plate rotates to the storage position, the operating portion approaches the end face of the operating end. When the cover plate rotates to the open position, the second drive portion drives the locking mechanism to be released. The end face of the operating portion away from the operating end is used for pulling the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage terminal electrical appliances, and particularly to a tensile locking structure of a circuit breaker and a plug-in circuit breaker.

Background Art

[0002] In recent years, with the development of communication technology, plug-in circuit breakers have been widely used. Existing plug-in circuit breakers are connected to a cabinet in a plug mode, and mainly operate a button part to pull out or remove the plug-in circuit breaker from the cabinet. However, such a pulling and removing structure has the following defects. First, when operating the operating part by poking the handle, the pulling and removing structure of the button part cannot achieve the normal removal of the circuit breaker. Second, in a multi-pole circuit breaker, it is impossible to separately pull one of a plurality of button parts to achieve normal removal. Third, the existing pulling and removing structure cannot release the locking mechanism of the circuit breaker.

Summary of the Invention

Problems to be Solved by the Invention

[0003] An object of the present invention is to overcome the drawbacks of the prior art, provide a tensile locking structure of a circuit breaker that facilitates pulling and removal and can cooperate with a locking mechanism, and a plug-in circuit breaker applying the tensile locking structure.

Means for Solving the Problems

[0004] To achieve the above object, the present invention adopts the following technical solutions.

[0005] The present invention provides a pulling and locking structure for a circuit breaker, which includes a housing of the circuit breaker, a handle mechanism rotatably attached to an operating end of the housing, and an operating mechanism and a locking mechanism provided inside the housing. The handle mechanism drives the circuit breaker to perform switch-off and switch-on operations in conjunction with the operating mechanism. The structure further includes a cover plate rotatably connected to the housing, and an operating portion and a second driving portion are provided on the cover plate. The cover plate rotates between a storage position and an open position. When the cover plate rotates to the storage position, the operating portion approaches an end face of the operating end. When the cover plate rotates to the open position, the second driving portion drives the locking mechanism to be released, and an end face of the operating portion away from the operating end is used for pulling the circuit breaker.

[0006] Preferably, when the cover plate rotates to the storage position, it becomes parallel to an end face of the operating end of the housing, and when the cover plate rotates to the open position, it becomes perpendicular to the end face of the operating end.

[0007] Preferably, one side of the cover plate is a flat area, a storage groove is formed in an end face of the operating end of the housing, and when the cover plate rotates to the storage position, it covers the storage groove, and the flat area remains flush with the end face of the operating end.

[0008] Preferably, the operating portion protrudes and is arranged on one side of the cover plate facing the end face of the operating end, and when the storage groove is covered by the cover plate, the operating portion fits into the storage groove.

[0009] Preferably, a rotating portion is provided at one end of the cover plate away from the operating portion, an opening communicating with the inside of the housing is formed inside the storage groove, and the rotating portion is rotatably connected to an inner side wall of the housing at the opening; a boss as the second driving portion protrudes and is provided on one side of the rotating portion away from the operating portion.

[0010] Preferably, an interlocking hole is provided in the operating portion, an interlocking shaft is attached inside the interlocking hole, and the interlocking shaft is used for connecting two adjacent cover plates to each other.

[0011] Preferably, when covering the storage groove with the cover plate, the operation part is located at one end of the storage groove away from the handle mechanism, and the rotating part is located between the handle mechanism and the operation part; or when covering the storage groove with the cover plate, the operation part is located at one end of the storage groove close to the handle mechanism, and the operation part is located between the rotating part and the handle mechanism.

[0012] Preferably, a return spring is provided between the cover plate and the housing, and the return spring drives the cover plate to rotate to the storage position.

[0013] Preferably, a plurality of parallel handle mechanisms are rotatably assembled at the operation end of the housing, two adjacent handle mechanisms are interlocked with each other, a storage groove is formed at the end face of the operation end on one side of at least one of the handle mechanisms, the storage grooves are respectively covered by one cover plate, and the operation parts of two adjacent cover plates are interlocked with each other via an interlocking shaft.

[0014] Preferably, the handle mechanism rotates between a switch-on position and a switch-off position. When the handle mechanism rotates to the switch-on position, the handle mechanism drives the circuit breaker to perform a switch-on operation via the operating mechanism. When the handle mechanism rotates to the switch-off position, the handle mechanism drives the circuit breaker to perform a switch-off operation via the operating mechanism; The cover plate is provided with a position limiting part, and when the handle mechanism rotates to the switch-on position, the cover plate is prevented from rotating from the storage position to the opening position in cooperation with the position limiting part; when the cover plate rotates to the opening position, a position limit is applied to the handle mechanism to prevent the handle mechanism from rotating from the switch-off position to the switch-on position.

[0015] Preferably, the handle mechanism includes a first driving part. When the handle mechanism rotates to the release position, the switch-off position is located between the switch-on position and the release position. When the handle mechanism rotates from the switch-off position to the release position, the first driving part drives the locking mechanism to be released.

[0016] Preferably, a position-limiting hole is provided in the side wall of the housing. The locking mechanism includes a locking member, a release member, and an elastic member. The locking member is provided with a locking part. The elastic member drives the locking member to extend the locking part outside the position-limiting hole. The release member is rotatably assembled between the handle mechanism and the locking member. The release member includes a second release part and a third driving part. When the cover plate rotates to the open position, the second driving part of the cover plate cooperates with the second release part to drive the release member to rotate. The release member drives the locking member through the third driving part to retract the locking part into the housing; The release member further includes a first release part. When the handle mechanism rotates from the switch-off position to the release position, the first driving part cooperates with the first release part to drive the release member to rotate. The third driving part cooperates with the cooperating part of the locking member to drive the locking part to retract into the housing.

[0017] Preferably, a position-limiting hole is provided in the side wall of the housing. The locking mechanism includes a release member and an elastic member. The release member is rotatably assembled between the handle mechanism and the position-limiting hole. The release member 31 includes a second release part and a locking part. When the elastic member drives the release member, the locking part extends from the position-limiting hole. When the cover plate rotates to the open position, the second driving part of the cover plate cooperates with the second release part to drive the release member to rotate, and the locking part retracts into the housing 1; The release member further includes a first release part. When the handle mechanism rotates from the switch-off position to the release position, the first driving part cooperates with the first release part to drive the release member to rotate, and the locking part retracts into the housing.

[0018] Preferably, the release member includes a first rotating arm and a second rotating arm. The first rotating arm is connected to one end of the second rotating arm to form a rotating part. The other end of the first rotating arm cooperates with the first driving part of the handle mechanism as a first release part. The other end of the second rotating arm hits the cooperating part of the locking member as a third driving part, or a boss is provided protruding as a locking part at the other end of the second rotating arm.

[0019] The present invention further provides a circuit breaker including a housing, wherein the pulling and locking structure is provided at an operating end of the housing.

Advantages of the Invention

[0020] For the pulling and locking structure of the circuit breaker according to the present invention, and the plug-in type circuit breaker applying the pulling and locking structure, a cover plate that can be stored is provided. When removing the circuit breaker, while opening the cover plate and the second driving part of the cover plate releases the locking mechanism, the operating part after opening the cover plate applies a pulling force or cooperates with a removal tool to pull the circuit breaker. Compared with the existing method of pulling the circuit breaker through a button part, the present invention has the advantages of a simple structure, high stability, and convenience in pulling.

[0021] Moreover, a storage groove is formed on an end face of the operating part of the housing. When the cover plate rotates to the storage position, it covers the storage groove to store the operating part in the storage groove. This arrangement has a compact structure and serves a sealing function. One side of the cover plate facing away from the housing is flat and is kept flat with the outside of the housing by covering the storage groove, which further helps the cover plate to form an integral whole with the housing.

[0022] Moreover, in a multi-pole circuit breaker, two adjacent cover plates are interlocked to achieve an integrated pull, which is more convenient and reliable than the existing method that requires pulling each button part separately during operation.

Brief Description of the Drawings

[0023]

Figure 1

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Figure 17

Embodiments for Carrying out the Invention

[0024] Next, we will further explain the tensile locking structure of the circuit breaker and the specific embodiments of the plug-in circuit breaker according to the present invention in combination with the embodiments shown in FIGS. 1-17. The tensile locking structure of the circuit breaker and the plug-in circuit breaker according to the present invention are not limited to the descriptions of the following embodiments.

[0025] As shown in FIGS. 1-17, a plug-in circuit breaker inserted into the interior of a cabinet includes a housing 1, an operating end 11 that is one end of the housing 1, a handle mechanism 2 rotatably assembled to the operating end 11, a connection terminal 12 that is the other end of the housing 1, and a connection device that cooperates with a plug connection at the connection terminal 12 (not shown). Preferably, a guiding groove 17 (see FIG. 4) is provided on the side wall of the housing 1. The guiding groove 17 serves as a guide for the plug of the circuit breaker. The opening of the guiding groove 17 faces the connection terminal 12. An operating mechanism 7, a contact mechanism, and a locking mechanism are arranged inside the housing 1 between the operating end 11 and the connection terminal 12. The contact mechanism includes a movable contact and a stationary contact that cooperate with each other. The movable contact is connected to the operating mechanism 7, and the stationary contact is fixedly attached inside the housing 1. When the handle mechanism 2 interlocks with the operating mechanism 7, the movable contact is driven to contact or separate from the stationary contact. A position limiting hole 13 is provided on the side wall of the housing 1 between the operating end 11 and the connection terminal 12. The locking mechanism includes a locking portion 321 that cooperates with the position limiting hole 13. When the locking portion 321 extends from the position limiting hole 13 and the locking mechanism is in a locked state, the circuit breaker inserted into the cabinet may be positionally restricted and engaged with the cabinet so as not to be withdrawn. When the locking portion 321 is retracted inside the housing 1 and the locking mechanism is in a released state, the circuit breaker inserted into the cabinet may be withdrawn. The handle mechanism 2 may rotate to a switch-on position and a switch-off position. When the handle mechanism 2 rotates to the switch-on position, the handle mechanism 2 drives the circuit breaker to perform a switch-on operation via the operating mechanism 7. When the handle mechanism 2 rotates to the switch-off position, the handle mechanism 2 drives the circuit breaker to perform a switch-off operation via the operating mechanism 7. Moreover, other components of the circuit breaker, such as a short-circuit protection mechanism, an arc extinguishing device, and an overload protection mechanism, which may also be arranged inside the housing 1 between the connection device and the contact mechanism, belong to the prior art in this field and are not repeated here.

[0026] As shown in FIGS. 6-7, the improvement of the present invention lies in that a cover plate 4 is rotatably connected to the operation end 11 of the housing 1, and an operation part 42 and a second driving part 43 are provided on the cover plate 4. The cover plate 4 rotates between a storage position and an open position. When the cover plate 4 rotates to the storage position, the operation part 42 approaches the end face of the operation end 11. When the cover plate 4 rotates to the open position, the second driving part 43 drives to release the locking mechanism. The end face of the operation part 42 away from the operation end 11 is used for pulling the circuit breaker, and the cover plate 4 forms a structure for releasing the pulling of the circuit breaker. The plug-in type circuit breaker is pulled out of the cabinet through the operation part 42. In order to apply a greater pulling force, it is possible to directly apply a force from the operation part 42 or assemble a removal tool to the operation part 42. The cover plate 4 and the locking mechanism form a pulling and locking structure of the circuit breaker. The pulling and locking structure and the plug-in type circuit breaker applying the pulling and locking structure are provided with a cover plate 4 that can be stored. When removing the circuit breaker, while opening the cover plate 4 and the second driving part 43 of the cover plate 4 releases the locking mechanism, after the cover plate 4 is opened, the operation part 42 applies a pulling force or cooperates with a removal tool to pull the circuit breaker. This has the advantages of a simple structure, high stability, and convenient pulling compared to the existing method of pulling the circuit breaker through a button part.

[0027] Preferably, when the cover plate 4 rotates to the storage position, it becomes parallel to the end face of the operation end 11 of the housing 1, and forms an angle with the end face of the operation end 11 when rotating to the open position. Preferably, the angle formed between the cover 4 and the end face of the operation end 11 is 90°, that is, the cover plate 4 is perpendicular to the end face of the operation end 11.

[0028] Preferably, as shown in FIGS. 2 and 6-11, a storage groove 14 is formed on the end face of the operation end 11 of the housing 1. The storage groove 14 is located on one side of the handle mechanism 2 and is located above the handle mechanism 2 in the figure. The cover plate 4 covers the storage groove 14 when rotating to the storage position. Rotating portions 41 and operating portions 42 are respectively arranged at both ends of the cover plate 4. The cover plate 4 is provided with a second driving portion 43 that may extend into the housing 1. The rotating portion 41 is rotatably connected to the housing 1, and the second driving portion 43 may protrude and be arranged on one side of the rotating portion 41 away from the operating portion 42. Preferably, the rotating portion 41 and the operating portion 42 protrude and are arranged on the same side of the cover plate 4 facing the end face of the operating portion 11 of the housing 1, and the other side of the cover plate 4 becomes a flat area 45. When covering the storage groove 14 with the cover plate 4, the rotating portion 41 and the operating portion 42 fit into the storage groove 14, and the flat area 45 remains flush with the outside of the housing 1. In other words, the flat area 45 remains flush with the end face of the operation end 11. At this time, the cover plate 4 forms an integral structure with the housing 1, and the cover plate 4 also serves as a shielding member and a pulling member. This has the advantages of a simple structure, aesthetics, and pulling convenience compared to the existing method of pulling the circuit breaker through the button portion.

[0029] The operating part 42 is a boss protruding on one side of the cover plate 4. An operating surface 421 for applying a pulling force is provided on the operating part 42. The operating surface 421 intersects one side 4 of the cover plate facing the housing 1 and is located on one side of the operating part 42 closer to the surrounding part 41. When the cover plate 4 rotates to the open position, it faces the end surface of the operating end 11 of the housing 1, and is configured to apply a pulling force or cooperate with a removal tool to pull the circuit breaker. Among them, the boss of the operating part 421 may be in the shape of an arc-shaped boss, an annular boss, a flat boss or other structures. The concave surface of the arc-shaped boss, the hole wall of the central hole of the annular boss or the side wall of the flat boss is used as the operating surface 421. Preferably, the operating surface 421 is an arc-shaped surface to facilitate the intervention of a finger or a removal tool. In addition, a plurality of anti-slip convex ridges are arranged on the surface of the operating part 42. Preferably, the side wall of the operating part 42 away from one side of the surrounding part 41 serves as a pushing surface 422, and a plurality of anti-slip convex ridges are provided on the pushing surface 422. In this way, it is convenient to open the cover plate 4 through the pushing surface 422.

[0030] Preferably, the surrounding part 41 is rotatably connected to the housing 1 immediately adjacent to the handle mechanism 2. The second driving part 43 may be provided on one side of the surrounding part 41 away from the operating part 42, and the second driving part 43 can be in the shape of a boss or a rod-shaped structure. An opening communicating with the inside of the housing 1 is opened at one end of the storage groove 14. The surrounding part 41 connected to the opening is configured such that the second driving part 43 extends into the housing 1 and cooperates with the locking mechanism. Preferably, the opening is provided on the side close to the handle mechanism 2. When the storage groove 14 is covered by the cover plate 4, the operating part 42 is located at one end of the storage groove 14 away from the handle mechanism 2, and the surrounding part 41 is located between the handle mechanism 2 and the operating part 42. Of course, the surrounding part 41 may also be provided on the side away from the handle mechanism 2. When the storage groove 14 is covered by the cover plate 4, since the operating part 42 is located between the surrounding part 41 and the handle mechanism 2, it is not very convenient for operation relatively.

[0031] In particular, a position limiting portion 46 is provided at one end of the cover plate 4 close to the handle mechanism 2. When the handle mechanism 2 rotates to the switch-on position and cooperates with the position limiting portion 46 to prevent the cover plate 4 from rotating from the storage position to the open position, the handle mechanism 2 performs a pulling operation while preventing the cover plate 4 from being opened in the switch-on state so as to improve the safety of electric use. In this embodiment, the position limiting portion 46 is formed by a portion of the planar region 45 close to one end of the handle mechanism 2. Preferably, when the cover plate 4 rotates to the open position and gives a position limit to the handle mechanism 2 to prevent the handle mechanism 2 from rotating from the switch-off position to the switch-on position, the switch-on operation during pulling is prevented so as to improve the safety of electric use.

[0032] Furthermore, an interlocking hole 47 is provided in the operation portion 42, and an interlocking shaft 6 is attached inside the interlocking hole 47. When a plurality of cover plates 4 are arranged on the end face of the operation end 11, for example, when the circuit breaker is a multi-pole circuit breaker and the cover plates 4 are arranged for each circuit breaker pole, it is convenient to pull the multi-pole circuit breaker simultaneously by connecting two adjacent cover plates 4 to each other with the interlocking shaft 6. When the circuit breaker is a multi-pole circuit breaker, it is not necessary to provide a cover plate 4 and a locking mechanism for each circuit breaker pole. It is also possible to provide only at least one cover plate 4 and a locking mechanism for the circuit breaker pole corresponding to the cover plate 4. For example, in the case of a 3P circuit breaker, there is a possibility of providing a cover plate 4 and a locking mechanism for one circuit breaker pole in the middle, or there is a possibility of providing a cover plate 4 and a locking mechanism for each pole. For example, in the case of a 4P circuit breaker, there is a possibility of providing a cover plate 4 and a locking mechanism for two circuit breaker poles in the middle, or there is a possibility of providing a cover plate 4 and a locking mechanism for each pole.

[0033] Moreover, the return spring 5 is provided between the cover plate 4 and the housing 1. The return spring 5 is assembled to be co-axially rotatable with the cover plate 4. The two elastic arms of the return spring 5 drive the cover plate 4 to rotate to the storage position. In other words, the return spring 5 cooperates with the cover plate 4 and the housing 1 to apply a return force to the cover plate 4 so that the cover plate 4 rotates in the direction of covering the storage groove 14.

[0034] Preferably, the handle mechanism 2 may also be used to release the locking mechanism. The handle mechanism 2 rotates to a switch-on position, a switch-off position, and a release position. The switch-off position is located between the switch-on position and the release position. The handle mechanism 2 includes a first drive unit 21. When the handle mechanism 2 rotates from the switch-off position to the release position, the first drive unit 21 drives the locking mechanism to be released.

[0035] The present invention describes a first embodiment of a plug-in circuit breaker in combination with FIGS. 1-8 and FIGS. 11-17. In this embodiment, a pull-release structure is provided in a cooperative manner at an operating end 11 of a housing 1.

[0036] As shown in FIGS. 1-18, both ends of the housing 1 serve as an operating end 11 and a connection terminal 12, respectively. A position-limiting hole 13 is provided in a side wall of the housing 1 between the operating end 11 and the connection terminal 12. A handle hole and a storage groove 14 are provided on an end face of the operating end 11. Among them, the handle hole is located on one side of the end face of the operating end 11 away from the position-limiting hole 13, and the storage groove 14 is located on one side of the end face of the operating end 11 close to the position-limiting hole 13. A first connection portion 161 is provided on an inner wall of the housing 1 below the handle hole. The handle mechanism 2 includes a handle body. The handle body includes a circumferential connection portion and a handle portion that are integrated. The circumferential connection portion cooperates rotatably with the first connection portion 161. The handle portion is connected to one side of the circumferential connection portion and extends outside the housing 1 from the handle hole. A boss serving as a first drive unit 21 protrudes and is arranged on one side of the handle portion. The first drive unit 21 and the handle portion are located on both sides of the circumferential connection portion, respectively.

[0037] One end of the storage groove 14 close to the handle mechanism 2 is provided with an opening, and the opening communicates with the inside of the housing 1. A connection hole 15 is provided on the inner wall of the housing 1 at the opening. A connection shaft is assembled inside the connection hole 15, and the cover plate 4 is assembled coaxially with the return spring 5 to the connection shaft. The opening is blocked after the cover plate 4 is assembled with the return spring 5, or is blocked by other structures on the inner wall of the housing 1. In this way, there is a possibility of only driving the second driving part 43 of the locking mechanism to enter the opening, so as to prevent foreign objects from entering the inside of the housing 1. The end of the bottom wall of the storage groove 14 close to the opening is used to abut against one elastic arm of the return spring 5, and the bottom of the storage groove 14 away from one side of the opening is recessed to form an arc-shaped depression. The arc-shaped depression may correspond to the operation part 42 for storing the cover plate 4, so that when the storage groove 14 is covered with the cover plate 4, the cover plate 4 is kept flat with the outside of the housing 1. One end of the storage groove 14 opened away from the handle mechanism 2 is covered with the cover plate 4.

[0038] In this embodiment, the locking mechanism is correspondingly provided below the storage groove 14. The locking mechanism includes a locking member 32, a release member 31, and an elastic member 33. Among them, the locking member 32 is provided on one side of the position limiting hole 13. Preferably, the locking member 32 of this embodiment can cooperate with the housing 1 slidably, and of course, it may be rotatably connected to the housing 1. The locking member 32 is provided with a locking part 321 and a cooperating part 322, and the elastic member 33 drives the locking member 32 to extend the locking part 321 outside the position limiting hole 13. At this time, the locking mechanism is in a locked state. The release member 31 is rotatably assembled between the handle mechanism 2 and the locking member 32. The release member 31 includes a first release part 311, a second release part 312, and a third driving part 313. When the cover plate 4 rotates to the open position, the second driving part 43 of the cover plate 4 cooperates with the first release part 311 to drive the release member 31 to rotate, and the release member 31 drives the locking member 32 through the third driving part 313 to retract the locking part 321 into the housing 1. At this time, the locking mechanism is in a released state. When the handle mechanism 2 rotates to the release position, the first driving part 21 cooperates with the first release part 311 to drive the release member 31 to rotate, and the third driving part 313 presses against the cooperating part 322 to drive the locking part 321 to retract into the housing 1.

[0039] Specifically, as shown in FIG. 11, a second connecting portion 162 is provided between the position limiting hole 13 and the storage groove 14. The second connecting portion 162 corresponds to the lower part of the storage groove 14. In FIG. 11, the second connecting portion 162 is located on the right side of the storage groove 14. The release member 31 is rotatably connected to the housing 1 via the second connecting portion 162. At least one side of the position limiting hole 13 is provided with a sliding limiting portion, and a locking member 32 that slidably cooperates with the sliding limiting portion is arranged such that the locking member 32 performs a linear motion on one side of the position limiting hole 13 under the drive of the elastic member 33 and the release member 31. Of course, it is also possible not to provide the sliding limiting portion. When the locking member 32 is rotatably provided on one side of the position limiting hole 13 and the elastic member 33 and the release member 31 drive the locking member 32 to rotate, the locking member 321 extends from the position limiting hole 13 or retracts into the housing 1.

[0040] On one side of the locking member 32 facing the position limiting hole 13, a locking portion 321 and a cooperating portion 322 are provided. Among them, the locking portion 321 is a protruding boss, the locking portion 321 cooperates with the position limiting hole 13, the cooperating portion 322 is an inclined surface provided on one side of the locking member 32, and the cooperating portion 322 can cooperate with the third driving portion 313 of the release member 31. Moreover, the release member 31 is located corresponding to the lower part of the storage groove 14. A second release portion 312 is provided on one side of the release member 3 facing the storage groove 14. The second driving portion 43 provided on the cover plate 4 may extend into the housing 1. The second driving portion 43 cooperates with the second release portion 312 to drive the release member 31, and thus drive the locking member 32, so as to retract the locking portion 321 into the housing 1. Of course, when the second driving portion 43 is not provided on the release member 31, when the handle mechanism 2 directly swings to the release position, the release member 31 can also be driven in the same way to release the locking member 32.

[0041] The present invention describes a specific structure of the release member 31 in combination with FIGS. 6-8. The release member 31 includes a first rotating arm and a second rotating arm. The first rotating arm is connected to one end of the second rotating arm to form a rotating portion 41. The rotating portion 41 rotatably cooperates with the second connecting portion 162. The other end of the first rotating arm cooperates with the first driving portion 21 of the handle mechanism 2 as the first release portion 311. A boss protrudes from the middle portion of the first rotating arm. The boss is located on one side facing the cover plate 4 as the second release portion 312. The other end of the second rotating arm hits the cooperating portion 322 of the locking member 32 as the third driving portion 313. In the figure, the third driving portion 313 is attached to the inclined cooperating portion 322. It should also be noted that the position of the second release portion 312 is related to the position of the second driving portion 43, and the position of the second release portion 312 is not limited to the middle portion of the first rotating arm.

[0042] The locking member 32 is block-shaped as a whole, and a locking portion 321 and a cooperating portion 322 are provided on one side of the locking member 32 facing the position-limiting hole 13. The locking portion 321 is a boss protruding from one side of the locking member 32, and one side of the locking member 32 facing the position-limiting hole 13 is "convex"-shaped as a whole. An L-shaped groove is formed in the locking member 32 on the same side as the locking portion 321, and the side wall of the L-shaped groove facing the position-limiting hole 13 is an inclined surface, and the inclined surface serves as the cooperating portion 322 and contacts the releasing member 31. As shown in FIGS. 6-8, one side of the cooperating portion 322 away from the releasing member 31 is at a high level, and one side of the cooperating portion 322 close to the releasing member 31 is at a low level. Preferably, the cooperating portion 322 can be attached to one side of the second-rotation arm to improve the coordination degree between the two. A boss structure protrudes from the main body of the locking member 32 with its back facing one side of the position-limiting hole 13, and a notch groove is provided at the corner of the boss structure. When the contact support body is switched from the switch-on position to the switch-off position, the notch groove can avoid the contact support body. When the contact support body is in the switch-on position, one side of the notch groove can contact the contact support body to suppress the release of the locking mechanism. When the contact support body is in the switch-off position and the locking member 32 is in the released state and retracts into the housing, one side of the notch groove can contact the contact support body to suppress the switch-on operation of the contact support body. An assembly hole is provided on one side directly adjacent to the boss structure, and the elastic member 33 is assembled between the assembly hole and the inner wall of the housing 1 in a cooperative manner. In other words, both ends of the elastic member 33 contact the third cooperating portion 322 and the inner wall of the housing 1 respectively, so that the elastic member 33 is deformed to drive the locking member 32 to slide inside the housing 1.

[0043] The operating mechanism 7 is rotatably assembled below the locking mechanism. The operating mechanism 7 includes a contact support rotatably connected to the housing 1. A locking element and a pull-off element are rotatably assembled to the contact support. The pull-off element is engaged with one end of the locking element by a buckle. The contact support is interlockingly connected to the handle mechanism via a connecting rod. The movable contact is attached to the contact support via a movable contact spring, and the contact support is located on one side of the locking member 32. When the circuit breaker performs a switch-on operation, the protruding position limiting surface of the contact support rotates to a position corresponding to the locking member 32, and the contact support cooperates with the locking member 32 to limit the position and prevent the locking member 32 from moving so as to prevent the locking member 321 from retracting into the housing 1. When the circuit breaker performs a switch-off operation, the protruding position limiting surface of the contact support rotates to a position avoiding the locking member 32. When the circuit breaker is in the switched-off position and the locking member 32 is in the released state and retracted inside the housing 1, one side of the notched groove can abut against the contact support to prevent the contact support from being switched on.

[0044] The present invention describes a first embodiment of the cover plate 4 in combination with FIGS. 1-7 and FIGS. 12-14. The cover plate 4 includes a cover plate body, the width of the cover plate body being the same as the width of the end face of the operation end 11. An operation part 42 and a rotating part 41 are respectively provided at both ends of the cover plate body, and among them, the operation part 42 and the rotating part 41 protrude and are located on the same side of the cover plate body. The other side of the cover plate body where the rotating part 41 and the operation part 42 are not provided is a flat area 45. After covering the storage groove 14, the flat area 45 remains flat with the outside of the housing 1. As shown in FIGS. 12-14, the rotating part 41 is a columnar boss provided to protrude on one side of the cover plate body, and a shaft hole 413 is provided in the middle part of the rotating part 41. A connecting shaft assembled inside the shaft hole 413 and the connection hole 15 enables the cover plate 4 to be rotatably assembled to the housing 1. An attachment groove 411 is opened on the end face of one end of the rotating part 41, and a shaft hole 413 penetrating the rotating part 41 is provided at the bottom of the attachment groove 411, and the return spring 5 is assembled in the attachment groove 411. Preferably, the return spring 5 is a torsion spring surrounding the connecting shaft. A notch 412 is provided on one side of the attachment groove 411. One elastic arm of the return spring 5 extends from the notch 412 and abuts against the housing 11, and the other elastic arm abuts against the other side of the notch 412. A boss structure is provided on the outside of the rotating part 41 away from one side of the operation part 42, and the boss structure serves as a second driving part 43 that cooperates with the second releasing part 312 of the releasing member 31.

[0045] The operating part 42 is an annular boss provided on one side of the cover plate body. The annular boss has a hole wall of the central hole serving as an operating surface 421, and the central axis of the central hole is parallel to the central axis of the mounting groove 411. The outer diameter of the operating part 42 is larger than the outer diameter of the surrounding part 41. In other words, one side of the operating part 42 protrudes even more. When covering the storage groove 14 with the cover plate 4, one side of the operating part 42 may hit the arc-shaped depression of the mounting groove 411. After opening the cover plate 4, the removal tool may be inserted inside the central hole and adhered to the operating surface 421. The side wall on one side of the operating part 42 away from the surrounding part 41 serves as a pushing surface 422. In other words, in the figure, the arc-shaped outer side wall on one side of the operating part 42 away from the surrounding part 41 serves as the pushing surface 422, and a plurality of anti-slip convex ridges are provided on the pushing surface 422. In this embodiment, the width of the pushing surface 422 is the largest, and the width of one side of the annular boss closer to the connecting part becomes smaller. A linkage hole 47 is provided at one end of the operating part 42 away from the surrounding part 41, and a linkage shaft 6 that can be assembled inside the linkage hole 47 is used to connect two adjacent cover plate bodies.

[0046] Moreover, a reinforcing part 44 is connected between the operating part 42 and the surrounding part 41 to enhance the mechanical strength of the cover plate 4. The cover plate body with its back facing one side of the surrounding part 41, the operating part 42, and the reinforcing part 44 serves as a planar region 45. When covering the storage groove 14 with the cover plate 4, the planar region 45 remains flat with the outside of the housing 1. One end of the planar region 45 serves as a position limiting part 46 and cooperates with the handle mechanism 2 for position limitation. In other words, the position limiting part 46 is located at one end of the planar region 45 closer to the handle mechanism 2. When the handle mechanism 2 rotates to the switch-on position, the handle mechanism 2 is located above the position limiting part 46 and suppresses the opening of the cover plate 4.

[0047] In this structure, the peripheral part 41 of the cover plate 4 is rotatably connected to the housing 1 that is closer to one side of the handle mechanism 2, and the operation part 42 is located on the side away from the handle mechanism 2. However, it should also be noted that the connection mode of the cover plate 4 is not limited to this. In other words, the peripheral part 41 may be connected to the housing 1 away from one side of the handle mechanism 2. In this case, the operation part 42 is located on the side closer to the handle mechanism 2. At this time, the position limiting part 46 is located at the same end of the cover plate body together with the operation part 42, or the operation part 42 also serves as the position limiting part 46. In this way, when the handle mechanism 2 rotates to the switch-on position, the handle mechanism 2 can also prevent the cover plate 4 from opening. When the handle mechanism 2 swings to the switch-off position, the cover plate 4 can be opened.

[0048] The present invention describes a second embodiment of the cover plate 4 in combination with FIG. 15. Similar to the first embodiment of the cover plate 4, the cover plate 4 includes a cover plate body. The peripheral part 41 and the operation part 42 are provided protruding at both ends on the same side of the cover plate body. Among them, the peripheral part 41 is the same as that in the first embodiment of the cover 4. The cover plate body with its back facing one end of the operation part 42 and the peripheral part 42 is the planar region 45, and the position limiting part 46 consists of one end of the planar region 45. Different from the first embodiment of the cover plate 4, a reinforcing part 44 is not provided between the operation part 42 and the peripheral part 41. The operation part 42 of this embodiment is an arc-shaped boss. The concave surface of the arc-shaped boss faces the peripheral part 41 as the operation surface 421, and the arc-shaped outer wall of the arc-shaped boss serves as the pushing surface 422. That is, the side with its back facing the concave surface serves as the pushing surface 422 and is provided with anti-slip convex ridges. The operation part 42 is provided with an interlocking hole 47 similar to that in the first embodiment.

[0049] The present invention describes a third embodiment of the cover plate 4 in combination with FIG. 16. The cover plate 4 includes a cover plate body, and a surrounding portion 41 and an operation portion 42 are provided at both ends on the same side of the cover plate body. A reinforcing portion 44 is also provided between the surrounding portion 41 and the operation portion 42. The operation portion 42 of this embodiment is an annular boss with the same width. In other words, the width of the pushing and moving surface 422 of the operation portion 42 is the same as the width of one side of the operation portion 42 closer to the surrounding portion 41. It can also be understood that the overall width of the operation portion 42 is approximately the same as the width of the end surface of the operation end 11 so as to increase the mechanical strength of the operation portion 42. Other structures of the cover plate 4 are the same as those of the first embodiment of the cover plate 4. In other words, the surrounding portion 41, the mounting groove 411, the limiting portion 46, and the flat region 45 are the same as the structures of the first embodiment.

[0050] The present invention describes a fourth embodiment of the cover plate 4 in combination with FIG. 17. Similar to the second embodiment, the cover plate 4 includes a cover plate body, and a surrounding portion 41 and an operation portion 42 are provided at both ends on the same side of the cover plate body. A reinforcing portion 44 is not provided between the surrounding portion 41 and the operation portion 42. The operation portion 42 of this embodiment is a flat boss with the same width. The flat boss may form a certain angle with the cover plate body, and the side wall forming an angle between the flat boss and the cover plate body serves as an operation surface 421. In this embodiment, the flat boss is perpendicular to the cover plate body, and the side wall on the side where the flat boss is orthogonal to the cover plate body serves as an operation surface 421.

[0051] As another embodiment, it should also be noted that there is a possibility that the storage groove 14 is not provided on the end face of the operation end 11 of the housing 1. In this case, the cover plate 4 may be rotatably connected to the housing 1 and thus may be removably rotatably connected. In this case, the cover plate 4 of the above embodiment is rotatably connected to the housing 1 on one side of the handle mechanism 2. In other words, the rotating part 41 is rotatably connected to the housing 1 on one side of the handle mechanism 2. A through hole for the second driving part 43 to extend into the housing 1 is provided on the end face of the operation end 11. Preferably, among them, the operation part 42 is provided protruding on one side of the cover plate 4 with its back facing the end face of the operation end 11, and the cover plate 4 can be attached to the end face of the operation end 11 in parallel so as to reduce the occupied space of the cover plate 4 when rotating to the storage position. If the operation part 42 remains protruding on one side of the cover plate 4 facing the end face of the operation end 11, when the cover plate 4 becomes parallel to the end face of the operation end 11, there will be a certain distance between the cover plate 4 and the end face of the operation end 11, or one end of the cover plate 4 away from the operation part 42 will be attached to the end face of the operation end 11. When the cover plate 4 becomes parallel to the end face of the operation end 11, the operation part 42 is located outside the end face of the operation end 11 and avoids the end face of the operation end 11.

[0052] The present invention describes a second embodiment of a plug-in circuit breaker in combination with FIG. 5. The plug-in circuit breaker includes a housing 1. At least two parallel storage cavities are provided inside the housing 1, and one circuit breaker pole is provided in each storage cavity. In other words, at least one partition plate may be arranged inside the housing 1, and the internal space of the housing 1 may be divided into two storage cavities by the partition plate, or each circuit breaker pole includes a circuit breaker pole housing, and the internal space of each circuit breaker pole housing serves as one storage cavity, and a plurality of circuit breaker pole housings may be joined together to form the housing 1. Each circuit breaker pole includes an operating mechanism 7, a handle mechanism 2 and a locking mechanism similar to those in the above embodiment of the plug-in circuit breaker, and the handle mechanisms 2 of two adjacent circuit breaker poles are interconnected. In this way, a plurality of parallel handle mechanisms 2 are rotatably assembled at the operating end 11 of the housing 1, and a storage groove 14 is formed on the end face of the operating end 11 on one side of at least one of the handle mechanisms 2. In contrast, the storage groove 14 is covered by a cover plate 44, and the operating parts 42 of two adjacent cover plates 4 are interconnected via an interlocking shaft 6. Of course, preferably, a storage groove 14 is formed on the end face of the operating end 11 on one side of each handle mechanism 2. Each storage groove 14 corresponds to one storage cavity, and each storage groove 14 is covered by a cover plate 4 respectively. An interlocking hole 47 is provided in the operating part 42, and an interlocking shaft 6 is assembled inside the interlocking hole 47, and two adjacent cover plates 4 can be interconnected via the interlocking shaft 6. When all the cover plates 4 are pulled simultaneously, the circuit breaker is withdrawn from the cabinet.

[0053] In this embodiment, the inner wall structure of each storage cavity is the same as the inner wall of the housing 1 in the above-described embodiment of the plug-in circuit breaker, and both are provided with a first connection portion 161 and a second connection portion 162. Among them, a through hole is formed in the first connection portion 161 so that the handle linkage shafts 6 of two adjacent handle mechanisms 2 are interlockingly connected thereto. In addition, an avoidance hole is also provided in the side wall of the storage cavity, and the linkage shafts of two adjacent operating mechanisms 7 penetrate through the avoidance hole and are interlockingly connected to each other. At least two parallel position-limiting holes 13 are provided in the side wall on one side of the housing 1, each position-limiting hole 13 corresponds to one storage cavity, and the locking portion 321 in each circuit breaker pole cooperates with the position-limiting hole 13.

[0054] The present invention describes a third embodiment of a plug-in circuit breaker in combination with FIG. 9. The plug-in circuit breaker includes a housing 1, a handle mechanism 2, and an operating mechanism 7 similar to those in the first embodiment or the second embodiment, and a storage groove 14 similar to that in the first embodiment or the second embodiment may be provided at the operating end 11 of the housing 1. The storage groove 14 is covered with the cover plate 4 in the above-described embodiment.

[0055] The difference from the above-described embodiment is that the locking mechanism provided corresponding to the lower part of the storage groove 14 includes a release member 31 and an elastic member 33. The release member 31 is rotatably assembled between the handle mechanism 2 and the position-limiting hole 13, and the release member 31 includes a first release portion 311, a second release portion 312, and a locking portion 321. When the elastic member 33 drives the release member 31, the locking portion 321 extends from the position-limiting hole 13. When the cover plate 4 rotates to the open position, the second driving portion 43 of the cover plate 4 cooperates with the second release portion 311 to drive the release member 31 to rotate, so that the locking portion 321 retracts into the housing 1. When the handle mechanism 2 rotates from the switch-off position to the release position, the handle mechanism 2 drives the release member 31 to rotate via the first release portion 311, so that the locking portion 321 retracts into the housing 1.

[0056] As shown in Fig. 9, the release member 31 includes a first rotating arm and a second rotating arm. One end of the first rotating arm is connected to one end of the second rotating arm to form a rotating part 41. The other end of the first rotating arm cooperates with the first driving part 21 of the handle mechanism 2 as the first release part 311. A boss protrudes from the middle part of the first rotating arm. The boss is located on one side facing the cover plate 4 as the second release part 312. A boss as the locking part 321 protrudes from the other end of the second rotating arm.

[0057] In the above three embodiments, the first release part 311 and the second release part 312 are provided on the same release member and cooperate with the first driving part 21 and the second driving part 43 at the same time. Moreover, in this embodiment, when the handle mechanism 2 and / or the cover plate 4 drive the locking part 32 through the release member 31, the locking part 321 is retracted into the housing 1. As another structure of this embodiment, the handle mechanism 2 and / or the cover plate 4 can also directly drive the locking member 32. The locking mechanism includes a locking member 32 and an elastic member 33. The locking member 32 is movably arranged and includes a locking part 321. The elastic member 33 drives the locking member 32 to move so that the locking part 321 extends from the position limiting hole 13, and applies an acting force to the locking member 32 by the rotation of the handle mechanism 2 and / or the cover plate 4. The locking member 32 moving by the acting force releases the locking mechanism when the locking part 321 retracts into the housing 1. Moreover, the handle mechanism 2 and / or the cover plate 4 can also drive a plurality of release members to release the locking member 32.

[0058] The present invention describes a fourth embodiment of a plug-in circuit breaker in combination with FIG. 10. The plug-in circuit breaker includes a housing 1, a handle mechanism 2, and an operating mechanism 7 similar to those in the first or second embodiment. A storage groove 14 similar to that in the first or second embodiment may be provided at the operating end 11 of the housing 1. The storage groove 14 is covered by the cover plate 4 in the above embodiments. The locking mechanism is provided correspondingly below the storage groove 14. The locking mechanism includes a release member 31, a locking member 32, and a return spring 33. Among them, the locking member 32 and the return spring are the same as those in the first or second embodiment, and the structure of the release member 31 is similar to that in the first or second embodiment. However, the release member 31 does not include a second release portion 312. In other words, the cover plate 4 of this embodiment cannot drive the locking mechanism to release. The cover plate 4 of this embodiment is only used to pull or remove the circuit breaker. Of course, in this embodiment, the storage groove 14 may not be provided.

[0059] Moreover, when the cover plates 4 of the first, second, and third embodiments are only used to pull or remove the circuit breaker, the second release portion 312 in the locking mechanism may be omitted, or the second driving portion 43 may not be provided on the cover plate 4, or the second release portion 312 and the second driving portion 43 may not be provided simultaneously.

[0060] It should be noted that in the description of the present invention, the directions and positional relationships indicated by terms such as "up", "down", "left", "right", "inside", "outside", etc. are based on the directions and positional relationships shown in the drawings, and are only for the convenience of simplifying the description and explanation of the present invention. However, it does not explicitly or implicitly imply that the mentioned devices or elements must have a specific direction or must be configured and operated according to a specific direction. Therefore, it should not be understood as being limited to the present invention. Moreover, the terms "first", "second", and "third" are only used for the purpose of explanation and should not be understood as indicating relative importance.

[0061] As described above, the present invention will be described in further detail in combination with specific preferred embodiments. However, it should not be considered that specific examples of the present invention are limited to these descriptions. For those skilled in the art of the present invention, several simple inferences or substitutions can be made without departing from the concept of the present invention, and this should be regarded as belonging to the protection scope of the present invention.

Claims

1. A circuit breaker tension locking structure comprising a circuit breaker housing (1), a handle mechanism (2) rotatably attached to an operating end (11) of the housing (1), an operating mechanism (7) provided inside the housing (1), and a locking mechanism, wherein the handle mechanism (2) drives the circuit breaker to perform a switching-off operation and a switching-on operation in conjunction with the operating mechanism (7), and further comprising a cover plate (4) rotatably connected to the housing (1), wherein an operating portion (42) and a second driving portion (43) are provided on the cover plate (4), the cover plate (4) rotates between a storage position and an open position, when the cover plate (4) rotates to the storage position, the operating portion (42) approaches the end face of the operating end (11), and when the cover plate (4) rotates to the open position, the second driving portion (43) drives the locking mechanism to be released, and the end face of the operating portion (42) away from the operating end (11) is used for pulling the circuit breaker. A circuit breaker tension locking structure characterized by the above.

2. When the cover plate (4) rotates to the storage position, it becomes parallel to the end face of the operating end (11) of the housing (1), and when the cover plate (4) rotates to the open position, it becomes perpendicular to the end face of the operating end (11). The circuit breaker tension locking structure according to claim 1, characterized by the above.

3. One side of the cover plate (4) is a flat area (45), a storage groove (14) is opened on the end face of the operating end (11) of the housing (1), when the cover plate (4) rotates to the storage position, it covers the storage groove (14), and the flat area (45) is kept flat with the end face of the operating end (11). The circuit breaker tension locking structure according to claim 1, characterized by the above.

4. The operating portion (42) protrudes and is arranged on one side of the cover plate (4) facing the end face of the operating end (11), and when the storage groove (14) is covered by the cover plate (4), the operating portion (42) fits into the storage groove (14). The circuit breaker tension locking structure according to claim 3, characterized by the above.

5. A rotating portion (41) is provided at one end of the cover plate (4) away from the operating portion (42), an opening communicating with the inside of the housing (1) is opened inside the storage groove (14), and the rotating portion (41) is rotatably connected to the inner side wall of the housing (1) at the opening; a boss as the second driving portion (43) protrudes and is provided on one side of the rotating portion (41) away from the operating portion (42). The tensile locking structure of the circuit breaker according to claim 3, characterized in that...

6. An interlocking hole (47) is provided in the operation part (42), an interlocking shaft (6) is attached inside the interlocking hole (47), and the interlocking shaft (6) is used for connecting two adjacent cover plates (4) to each other. The tensile locking structure of the circuit breaker according to claim 1, characterized in that...

7. When covering the storage groove (14) with the cover plate (4), the operation part (42) is located at one end of the storage groove (14) away from the handle mechanism (2), and the rotating part (41) is located between the handle mechanism (2) and the operation part (42); or when covering the storage groove (14) with the cover plate (4), the operation part (42) is located at one end of the storage groove (14) close to the handle mechanism (2), and the operation part (42) is located between the rotating part (41) and the handle mechanism (2). The tensile locking structure of the circuit breaker according to claim 3, characterized in that...

8. A return spring (5) is provided between the cover plate (4) and the housing (1), and the return spring (5) drives the cover plate (4) to rotate back to the storage position. The tensile locking structure of the circuit breaker according to claim 1, characterized in that...

9. A plurality of parallel handle mechanisms (2) are rotatably assembled at the operation end (11) of the housing (1), two adjacent handle mechanisms (2) are interlockingly connected to each other, a storage groove (14) is opened at the end face of the operation end (11) on one side of at least one of the handle mechanisms (2), the storage grooves (14) are respectively covered by one cover plate (4), and the operation parts (42) of two adjacent cover plates (4) are interlockingly connected to each other via an interlocking shaft (6). The tensile locking structure of the circuit breaker according to claim 1, characterized in that...

10. The handle mechanism (2) rotates to the switch-on position and the switch-off position. When the handle mechanism (2) rotates to the switch-on position, the handle mechanism (2) drives the circuit breaker to perform a switch-on operation via the operation mechanism (7). When the handle mechanism (2) rotates to the switch-off position, the handle mechanism (2) drives the circuit breaker to perform a switch-off operation via the operation mechanism (7). The cover plate (4) is provided with a position limiting part (46), and when the handle mechanism (2) rotates to the switch-on position, the cover plate (4) is prevented from rotating from the storage position to the open position in cooperation with the position limiting part (46); when the cover plate (4) rotates to the open position, position limitation is imposed on the handle mechanism (2) so that the handle mechanism (2) does not rotate from the switch-off position to the switch-on position. The tensile locking structure of the circuit breaker according to any one of claims 1-9, characterized in that.

11. The handle mechanism (2) is provided with a first driving part (21), the handle mechanism (2) rotates to the release position, the switch-off position is located between the switch-on position and the release position, and when the handle mechanism (2) rotates from the switch-off position to the release position, the first driving part (21) drives the locking mechanism to be released. The tensile locking structure of the circuit breaker according to claim 10, characterized in that.

12. A position limiting hole (13) is provided in the side wall of the housing (1), the locking mechanism includes a locking member (32), a release member (31), and an elastic member (33), a locking part (321) is provided on the locking member (32), the elastic member (33) drives the locking member (32) to extend the locking part (321) outside the position limiting hole (13), the release member (31) is rotatably assembled between the handle mechanism (2) and the locking member (32), the release member (31) is provided with a second release part (312) and a third driving part (313), and when the cover plate (4) rotates to the open position, the second driving part (43) of the cover plate (4) cooperates with the second release part (312) to drive the release member (31) to rotate, and the release member (31) drives the locking member (32) through the third driving part (313) to retract the locking part (321) into the housing (1); The release member (31) further includes a first release part (311), and when the handle mechanism (2) rotates from the switch-off position to the release position, the first driving part (21) cooperates with the first release part (311) to drive the release member (31) to rotate, and the third driving part (313) cooperates with the cooperating part (322) of the locking member (32) to drive the locking part (321) to retract into the housing (1). The tensile locking structure of the circuit breaker according to claim 11, characterized in that...

13. A position limiting hole (13) is provided in the side wall of the housing (1), the locking mechanism includes a release member (31) and an elastic member (33), the release member (31) is rotatably assembled between the handle mechanism (2) and the position limiting hole (13), the release member 31 includes a second release portion (312) and a locking portion (321), when the elastic member (33) drives the release member (31), the locking portion (321) extends from the position limiting hole (13), when the cover plate (4) rotates to the open position, the second driving portion (43) of the cover plate (4) cooperates with the second release portion (311) to drive the release member (31) to rotate, and the locking portion (321) retracts into the interior of the housing 1; The release member (31) further includes a first release portion (311), when the handle mechanism (2) rotates from the switch-off position to the release position, the first driving portion (21) cooperates with the first release portion (311) to drive the release member (31) to rotate, so that the locking portion (321) retracts into the interior of the housing (1). The tensile locking structure of the circuit breaker according to claim 11, characterized in that...

14. The release member (31) includes a first rotating arm and a second rotating arm, the first rotating arm is connected to one end of the second rotating arm to form a rotating portion (41), the other end of the first rotating arm cooperates with the first driving portion (21) of the handle mechanism (2) as the first release portion (311), the other end of the second rotating arm hits the cooperating portion (322) of the locking member (32) as the third driving portion (313), or a boss as the locking portion (321) protrudes and is provided at the other end of the second rotating arm. The tensile locking structure of the circuit breaker according to claim 11, characterized in that...

15. A circuit breaker comprising a housing (1), wherein the tensile locking structure according to any one of claims 1-14 is provided at the operating end (11) of the housing (1). The circuit breaker is characterized in that...

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