Locking structure of multi-pole circuit breaker and multi-pole circuit breaker

Abstract

The locking structure of the multi-pole circuit breaker comprises at least two circuit breaker poles which are arranged side by side, each circuit breaker pole comprises a shell, the locking structure further comprises an unlocking mechanism and a locking mechanism, a mounting cavity is formed between the shells of at least two adjacent circuit breaker poles, a limiting hole is formed in the side wall of the mounting cavity, and the locking mechanism is mounted in the mounting cavity. The locking mechanism is provided with a locking part extending out of the limiting hole; and the unlocking mechanism can drive the locking mechanism to unlock, so that the locking part retracts into the mounting cavity. A multi-pole circuit breaker comprises the locking structure of the multi-pole circuit breaker. According to the locking structure of the multi-pole circuit breaker and the multi-pole circuit breaker, the locking mechanism driven by the unlocking mechanism is arranged in the mounting cavity between the two circuit breaker pole shells, that is, the two circuit breaker poles share one external locking mechanism, so that the internal structure of the circuit breaker poles is simplified, the size of the circuit breaker is reduced, and the reliability of the circuit breaker is improved. And when the damaged locking mechanism needs to be replaced, the shell of the circuit breaker pole does not need to be disassembled, and the locking mechanism can be directly disassembled and assembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low voltage apparatus, concretely relates to a locking structure of multi-pole circuit breaker and multi-pole circuit breaker. BACKGROUND

[0002] The existing plug-in circuit breaker is usually provided with a locking device to prevent live insertion and plug, and the locking device of the existing plug-in circuit breaker is arranged in the circuit breaker shell, which occupies a large space in the circuit breaker shell. Especially for the multi-pole circuit breaker, a locking device needs to be arranged in each pole circuit breaker, which greatly increases the size of the circuit breaker. SUMMARY

[0003] The utility model discloses a locking structure of multi-pole circuit breaker and multi-pole circuit breaker which overcome at least one defect of the prior art.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The locking structure of multi-pole circuit breaker comprises at least two circuit breaker poles arranged side by side, each circuit breaker pole comprises a shell, the locking structure further comprises an unlocking mechanism and a locking mechanism, an installation cavity is arranged between the shells of at least two adjacent circuit breaker poles, a limiting hole is arranged on the side wall of the installation cavity, the locking mechanism is installed in the installation cavity, and the locking mechanism is provided with a locking part extending out of the limiting hole; the unlocking mechanism can drive the locking mechanism to unlock, so that the locking part is retracted into the installation cavity.

[0006] Optionally, the outer sides of the shells of the two adjacent circuit breaker poles are respectively provided with half grooves, and when the shells of the two adjacent circuit breaker poles are tightly assembled, the half grooves on the shells of the two adjacent circuit breaker poles are spliced to form the installation cavity.

[0007] Optionally, an handle mechanism is rotationally assembled on the operation end of the shell, the handle mechanism can be rotated to an on-position and an off-position, the handle mechanism serves as the unlocking mechanism, when the handle mechanism is rotated to the on-position, the handle mechanism drives the circuit breaker pole to close, and when the handle mechanism is rotated to the off-position, the handle mechanism drives the circuit breaker pole to open.

[0008] The handle mechanism can be rotated to an unlocking position, the off-position is located between the on-position and the unlocking position, and when the handle mechanism is rotated from the off-position to the unlocking position, the locking mechanism is driven to unlock.

[0009] Optionally, the handle mechanism drives the locking mechanism to unlock through a linkage, the linkage is connected with the handle mechanisms of the two adjacent circuit breaker poles, the linkage is installed in the installation cavity, and when the handle mechanism is rotated from the off-position to the unlocking position, the linkage is driven to drive the locking mechanism to unlock.

[0010] Optionally, the linkage is connected with the handle mechanisms of the two circuit breaker poles through a first linkage shaft, and the linkage is coaxially and synchronously arranged with the handle mechanisms of the two circuit breaker poles.

[0011] Optionally, the handle mechanism is integrally provided with a handle protrusion extending into the installation cavity, and the handle protrusion drives the locking mechanism to be unlocked when the handle mechanism rotates from the open position to the unlocked position.

[0012] Optionally, the two adjacent circuit breaker poles each include a second elastic member for driving the handle mechanism to rotate from the unlocked position to the open position, the locking mechanism includes a first elastic member for driving the locking mechanism to extend the locking part out of the limiting hole, and the handle mechanism drives the locking mechanism to be unlocked by overcoming the force of the first elastic member when the handle mechanism rotates from the open position to the unlocked position against the force of the second elastic member; the force value of the first elastic member is greater than the sum of the force values of the second elastic members of the two adjacent circuit breaker poles.

[0013] Optionally, the puller mechanism shared by the two adjacent circuit breaker poles further includes a cover plate, the cover plate is rotationally connected with the operating ends of the housings of the two adjacent circuit breaker poles, the cover plate is provided with an operating part, and the cover plate rotates between a recovery position and an open position; when the cover plate rotates to the recovery position, the operating part is close to the end faces of the operating ends; and when the cover plate rotates to the open position, the operating part is away from the end faces of the operating ends for pulling the circuit breaker.

[0014] Optionally, the cover plate serves as the unlocking mechanism and is provided with a second driving part, and the cover plate drives the locking mechanism to be unlocked by the second driving part when the cover plate rotates from the recovery position to the open position.

[0015] Optionally, the cover plate drives the circuit breaker poles to be opened by the handle mechanism, one end of the cover plate close to the handle mechanism is provided with an opening driving part, and the cover plate drives the handle mechanism to make the circuit breaker poles be opened by the opening driving part when the cover plate rotates from the recovery position to the open position.

[0016] Optionally, an accommodating groove is arranged at the connection position of the end faces of the operating ends of the housings of the two adjacent circuit breaker poles, and the cover plate covers the accommodating groove when the cover plate rotates to the recovery position; one end of the cover plate away from the operating part is provided with a rotating part, an opening communicating with the inside of the installation cavity is arranged in the accommodating groove, the rotating part is connected at the opening, and a boss serving as a second driving part is arranged at the side of the rotating part away from the operating part.

[0017] Optionally, a plurality of cover plates are arranged, and the operating parts of two adjacent cover plates are connected by a second linkage shaft.

[0018] Optionally, the locking mechanism comprises a locking member provided with the locking portion, the locking member is linearly movably arranged in the mounting cavity, and the first elastic member drives the locking member to linearly move so that the locking portion extends out of the limiting hole or the locking member is rotatably arranged in the mounting cavity, and the first elastic member drives the locking member to rotate so that the locking portion extends out of the limiting hole.

[0019] Optionally, the locking mechanism comprises an unlocking member and a locking member, the locking member is provided with the locking portion, the first elastic member drives the locking member to make the locking portion extend out of the limiting hole, and the unlocking member is provided with a third driving portion; the unlocking mechanism drives the unlocking member to rotate, and the unlocking member drives the locking member to make the locking portion retract into the mounting cavity by overcoming the force of the first elastic member through the third driving portion.

[0020] Optionally, the locking member is provided with a matching portion, the mounting cavity is provided with a stop portion, the third driving portion is located between the matching portion and the stop portion, and the unlocking member drives the locking member to make the locking portion retract into the mounting cavity by pushing the matching portion through the third driving portion; when the first elastic member drives the locking member to make the locking portion extend out of the limiting hole, the locking member pushes the third driving portion to abut against the stop portion through the matching portion.

[0021] Optionally, the locking member is linearly slidably arranged, the locking portion is arranged on the side of the locking member facing the limiting hole and is in the form of a boss protruding from the side of the locking member, the side of the locking member facing the unlocking member is provided with an avoiding groove for avoiding the third driving portion of the unlocking member, and the side wall of the avoiding groove away from the locking portion serves as the matching portion.

[0022] The locking structure of the multi-pole circuit breaker and the multi-pole circuit breaker.

[0023] The locking structure of the multi-pole circuit breaker and the multi-pole circuit breaker, the locking mechanism driven by the unlocking mechanism is arranged in the mounting cavity between the two circuit breaker poles, that is, the two circuit breaker poles share an external locking mechanism, the internal structure of the circuit breaker pole is simplified, thereby reducing the size of the circuit breaker, and the locking mechanism is convenient to disassemble and assemble, and when the locking mechanism needs to be replaced, the shell of the circuit breaker pole does not need to be disassembled, and the locking mechanism can be directly disassembled and assembled.

[0024] In addition, a linkage member linked with the handle mechanism is additionally arranged between the two adjacent circuit breaker poles, the linkage member is also arranged in the mounting cavity outside the circuit breaker pole shell, the handle mechanism drives the locking mechanism to be unlocked, the unlocking structure is simple, and the original structure of the circuit breaker pole does not need to be changed.

[0025] In addition, the two circuit breaker poles share a cover plate, which is beneficial to simultaneously pulling out the two circuit breaker poles, reduces parts, simplifies the structure, and further reduces the size of the circuit breaker.

[0026] In addition, the cover plate driving locking mechanism is unlocked, and the circuit breaker pole is driven to be opened by the handle mechanism, so that the circuit breaker pole is prevented from being in the closed state after the cover plate is opened, and the live pulling operation is avoided to improve the electrical safety. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structure schematic diagram of the circuit breaker not inserted into the cabinet in the first embodiment of the utility model;

[0028] Figure 2 is a structure schematic diagram of the circuit breaker inserted into the cabinet in the first embodiment of the utility model;

[0029] Figure 3 is an exploded view of the locking structure of the utility model;

[0030] Figure 4 is a structure schematic diagram of the locking structure of the utility model when the cover plate is closed (the locking mechanism is in the locked state) and one circuit breaker pole is removed;

[0031] Figure 5 is a structure schematic diagram of the locking structure of the utility model when the cover plate is closed (the locking mechanism is in the unlocked state) and one circuit breaker pole is removed;

[0032] Figure 6 is a structure schematic diagram of the locking structure of the utility model when the cover plate is opened (the locking mechanism is in the unlocked state) and one circuit breaker pole is removed;

[0033] Figure 7 is a structure schematic diagram of the shell of the utility model;

[0034] Figure 8 is a structure schematic diagram of the unlocking piece of the utility model;

[0035] Figure 9 is a structure schematic diagram of the locking piece of the utility model;

[0036] Figure 10 is a structure schematic diagram of the cover plate of the utility model;

[0037] Figure 11 is a structure schematic diagram of the circuit breaker when the cover plate is closed in the first embodiment of the utility model;

[0038] Figure 12 is a structure schematic diagram of the circuit breaker when the cover plate is opened in the first embodiment of the utility model;

[0039] Figure 13 is a structure schematic diagram of the circuit breaker when the cover plate is closed in the second embodiment of the utility model;

[0040] Figure 14Is the second embodiment of the utility model circuit breaker in the cover plate opening structure schematic view.

[0041] Housing 1;Operating end 11;Wiring end 12;Limiting hole 13;Accommodating groove 14;Connecting hole 15;Second connecting portion 162;Guide side wall 17;Mounting cavity 101;Stop portion 102;Sliding limiting portion 103;Mounting column 104;

[0042] Handle mechanism 2;Second elastic member 20;

[0043] Unlocking piece 31;First unlocking portion 311;Second unlocking portion 312;Third drive portion 313;Unlocking piece rotating portion 314;Locking piece 32;Locking portion 321;Matching portion 322;Avoidance groove 323;Limiting notch 324;First elastic member 33;

[0044] Cover plate 4;Rotating portion 41;Mounting groove 411;Shaft hole 413;Operating portion 42;Operating hole 421;Pushing surface 422;Second drive portion 43;Flat area 45;Connecting shaft 46;Linkage hole 47;

[0045] Third elastic member 5;Second linkage shaft 6;

[0046] Linkage piece 7;First drive portion 71;First linkage shaft 8;Cabinet 9. Specific embodiments

[0047] The following embodiment is further illustrated in the drawings, the locking structure of the multi-pole circuit breaker and the specific embodiment of the multi-pole circuit breaker of the utility model.The locking structure of the multi-pole circuit breaker and the multi-pole circuit breaker of the utility model are not limited to the description of the following embodiment.

[0048] As Figures 1-14As shown, a multi-pole circuit breaker can be inserted into a cabinet 9 (only a part of the cabinet shell is shown in the figure), the multi-pole circuit breaker comprises a locking mechanism and at least two circuit breaker poles arranged side by side, each circuit breaker pole comprises a housing 1, one end of the housing 1 is an operating end 11, a handle mechanism 2 is rotatably arranged at the operating end 11, the other end of the housing 1 is a wiring end 12, a plug-in wiring device (not shown) is matched and arranged at the wiring end 12, a guide side wall 17 is arranged on the side wall of the housing 1 between the operating end 11 and the wiring end 12, and the guide side wall 17 provides a guide for the insertion of the circuit breaker, an operating mechanism and a contact mechanism are arranged in the housing 1 between the operating end 11 and the wiring end 12, the contact mechanism comprises a movable contact and a static contact matched with each other, the movable contact is connected to the operating mechanism, the static contact is fixedly arranged in the housing 1, and the handle mechanism 2 is linked with the operating mechanism to drive the movable contact to contact or move away from the static contact. The multi-pole circuit breaker further comprises a locking structure matched with the cabinet 9, the locking structure comprises an unlocking mechanism and a locking mechanism, a limiting hole 13 is arranged on the side wall of the housing 1 between the operating end 11 and the wiring end 12, the locking mechanism comprises a locking part 321 matched with the limiting hole 13, as shown in Figure 1 、 Figure 2 When the locking part 321 extends out of the limiting hole 13, the locking mechanism is in a locked state, can be limitedly matched with the cabinet 9 to prevent the circuit breaker from being inserted into the cabinet 9, and can be limitedly matched with the cabinet 9 to prevent the circuit breaker inserted into the cabinet 9 from being pulled out; the unlocking mechanism is used to drive the locking mechanism to unlock, so that the locking part 321 is retracted into the mounting cavity 101, when the locking part 321 is retracted into the limiting hole 13, the locking mechanism is in an unlocked state, can make the circuit breaker inserted into the cabinet 9, and can pull out the circuit breaker inserted into the cabinet 9; the handle mechanism 2 can be rotated to an on-position and an off-position, when the handle mechanism 2 is rotated to the on-position, the handle mechanism 2 drives the circuit breaker pole to be closed through the operating mechanism, at this time, the locking mechanism is in the locked state to prevent the circuit breaker from being pulled out under the condition of live line, when the handle mechanism 2 is rotated to the off-position, the handle mechanism 2 drives the circuit breaker pole to be opened through the operating mechanism, at this time, the locking mechanism is in the locked state.

[0049] In addition, a short-circuit protection mechanism, an arc extinguishing device and an overload protection mechanism can also be arranged in the housing 1 between the wiring device and the contact mechanism; the operating mechanism usually comprises a contact support rotatably connected with the housing 1, a jump buckle and a lock buckle are rotatably arranged on the contact support, one end of the jump buckle and the lock buckle is buckled matched, the contact support is linked with the handle mechanism 2 through a connecting rod, and the movable contact is arranged on the contact support through a movable contact spring, which are all prior art in the field and will not be described here.

[0050] As shown in Figure 3 、 Figure 4As shown, the improvement of the present application is that the locking mechanism is arranged between at least two adjacent circuit breaker poles, the locking structure is formed by the locking mechanism arranged between the two adjacent circuit breaker poles and the unlocking mechanism for driving the locking mechanism to unlock, the mounting cavity 101 is arranged between the housings 1 of the at least two adjacent circuit breaker poles, the side wall of the mounting cavity 101 is provided with the limiting hole 13, the locking mechanism is mounted in the mounting cavity 101, and the locking mechanism is provided with the locking portion 321 extending out of the limiting hole 13; as shown in Figure 5 or Figure 6 As shown, the unlocking mechanism can drive the locking mechanism to unlock, so that the locking portion 321 is retracted into the mounting cavity 101. For example, the unlocking mechanism can move to the first position and the second position, and the unlocking mechanism drives the locking portion 321 of the locking mechanism to retract into the mounting cavity 101 when the unlocking mechanism moves from the first position to the second position.

[0051] The locking structure of the multi-pole circuit breaker and the multi-pole circuit breaker of the embodiment are characterized in that the locking mechanism driven by the unlocking mechanism is arranged in the mounting cavity 101 between the two circuit breaker pole housings 1, that is, the two circuit breaker poles share an external locking mechanism, the internal structure of the circuit breaker pole is simplified, the size of the circuit breaker is reduced, the locking mechanism is convenient to disassemble and assemble, and the locking mechanism can be directly disassembled and assembled without disassembling the housing 1 of the circuit breaker pole when the locking mechanism needs to be replaced.

[0052] As shown in Figure 3 , Figure 7 As shown, the housings 1 of the two adjacent circuit breaker poles are respectively provided with half grooves on the outside, and the guide side walls 17 of the housings 1 of the two adjacent circuit breaker poles on the same side are respectively provided with half holes. When the housings 1 of the two adjacent circuit breaker poles are tightly assembled, the half grooves on the housings 1 of the two adjacent circuit breaker poles are spliced to form the mounting cavity 101, and the half holes are spliced to form the limiting hole 13. Of course, as another embodiment, a one-side opening cavity can be arranged on the outside of the housing 1 of one circuit breaker pole, and the limiting hole 13 can be arranged on the guide side wall 17 of the housing 1 of the circuit breaker pole. When the two circuit breaker pole housings 1 are assembled, the opening of the cavity is closed by the housing 1 of the other circuit breaker to form the mounting cavity 101.

[0053] As shown in Figure 4 and Figure 5 As shown, the handle mechanism 2 of the embodiment is an optional way of the unlocking mechanism. When the handle mechanism 2 is rotated to the closing position, the handle mechanism 2 drives the circuit breaker pole to close. When the handle mechanism 2 is rotated to the opening position as the first position of the handle mechanism 2, the handle mechanism 2 drives the circuit breaker pole to open. Figure 5As shown, the handle mechanism 2 can be rotated to an unlocking position as the second position of the handle mechanism 2, the tripping position is between the closing position and the unlocking position, when the handle mechanism 2 is rotated from the tripping position to the unlocking position, the drive locking mechanism is unlocked, that is, the locking part 321 of the locking mechanism is retracted into the installation cavity 101.

[0054] One way for the handle mechanism 2 to drive the locking mechanism to be unlocked is that the handle mechanism 2 drives the locking mechanism to be unlocked through the linkage 7 connected with at least one of the handle mechanisms 2 of the two adjacent circuit breaker poles, the linkage 7 is installed in the installation cavity 101, and the linkage 7 is provided with a first driving part 71; when the handle mechanism 2 is rotated from the tripping position to the unlocking position, the linkage 7 drives the locking mechanism to be unlocked through the first driving part 71. By adding the linkage linked with the handle mechanism 2 between the two adjacent circuit breaker poles, the handle mechanism 2 drives the locking mechanism to be unlocked, and the unlocking structure is simple and does not need to change the original structure of the circuit breaker pole.

[0055] Another way for the handle mechanism 2 to drive the locking mechanism to be unlocked (not shown in the figure) is that the handle mechanism 2 is integrally provided with a handle protrusion extending into the installation cavity 101, and when the handle mechanism 2 is rotated from the tripping position to the unlocking position, the handle protrusion directly drives the locking mechanism to be unlocked.

[0056] Preferably, as shown in Figure 4 , Figure 5 , the two adjacent circuit breaker poles each include a second elastic member 20 for driving the handle mechanism 2 to be rotated from the unlocking position to the tripping position, the locking mechanism includes a first elastic member 33, when the circuit breaker is in the tripped state, that is, the handle mechanism 2 is in the tripping position, the first elastic member 33 is used to drive the locking mechanism to make the locking part 321 extend out of the limiting hole 13, at this time, the circuit breaker cannot be inserted into the cabinet 9 or pulled out of the cabinet 9; when it is necessary to disassemble or install the circuit breaker, an external force presses the handle mechanism 2, so that the handle mechanism 2 overcomes the force of the second elastic member 20 and is rotated from the tripping position to the unlocking position, which drives the linkage 7 to drive the locking mechanism to be unlocked through the first driving part 71 and overcome the force of the first elastic member 33, so that the locking part 321 is retracted into the installation cavity 101, at this time, the circuit breaker can be inserted into the cabinet 9 or pulled out of the cabinet 9; the force value of the first elastic member 33 is greater than the sum of the force values of the second elastic members 20 of the two adjacent circuit breaker poles. Avoiding that the handle mechanism 2 easily drives the locking mechanism to be unlocked and causes the locking function of the locking mechanism to be invalid, which is conducive to improving the stability and reliability of the locking function of the locking mechanism.

[0057] As shown in Figure 3 , Figure 11 , Figure 12As shown, another improvement of the application is that two adjacent circuit breaker poles share one pulling mechanism for pulling out the circuit breaker from the cabinet 9. The pulling mechanism of the embodiment includes a cover plate 4, which is rotatably connected with the operating end 11 of the outer shell 1 of two adjacent circuit breaker poles respectively. The cover plate 4 is provided with an operating part 42 and a second driving part 43. The cover plate 4 is rotatable between a recovery position and an open position. When the cover plate 4 is rotated to the recovery position, the operating part 42 is close to the end face of the operating end 11. When the cover plate 4 is rotated to the open position, the operating part 42 is away from the end face of the operating end 11 for pulling out the circuit breaker. The circuit breaker can be pulled out from the cabinet 9 through the operating part 42. The operating part 42 can be directly used to apply force, or a dismounting tool can be assembled on the operating part 42 to apply greater pulling force. The operating part 42 of the cover plate 4 after being opened can apply pulling force or cooperate with the dismounting tool to pull out the circuit breaker, which has the advantages of simple structure, strong stability and convenient pulling. Two circuit breaker poles share one cover plate 4, which is conducive to pulling out two circuit breaker poles at the same time, reduces parts, simplifies structure and further reduces the size of the circuit breaker.

[0058] Further, the cover plate 4 is another optional way of the unlocking mechanism. The cover plate 4 is provided with a second driving part 43. When the cover plate 4 is rotated from the recovery position to the open position, the second driving part 43 drives the locking mechanism to be unlocked. When the circuit breaker is dismounted, the cover plate 4 is opened, and the second driving part 43 of the cover plate 4 simultaneously unlocks the locking mechanism. The cover plate 4 has the functions of pulling out the circuit breaker and unlocking the locking mechanism.

[0059] Preferably, as shown in Figure 5 When the cover plate 4 is rotated to the recovery position, the cover plate 4 is parallel to the end face of the operating end 11 of the outer shell 1. Figure 6 When the cover plate 4 is rotated to the open position, the cover plate 4 forms an angle with the end face of the operating end 11. Preferably, the angle between the cover plate 4 and the end face of the operating end 11 is 90°, that is, the cover plate 4 is perpendicular to the end face of the operating end 11.

[0060] Preferably, as shown in Figures 10-12As shown, a receiving groove 14 is provided at the connection of the operating end 11 of two adjacent circuit breaker pole housings 1; when the cover plate 4 is rotated to the retracted position, the receiving groove 14 is closed. A rotating part 41 and an operating part 42 are respectively provided at both ends of the cover plate 4. The cover plate 4 is also provided with a second driving part 43 that can extend into the mounting cavity 101. The rotating part 41 is rotatably connected to the housing 1. The second driving part 43 can be protruding and provided on the side of the rotating part 41 away from the operating part 42. Preferably, the rotating part 41 and the operating part 42 are protruding on the same side of the cover plate 4 facing the operating end 11 of the outer shell 1. The other side of the cover plate 4 is a flat area 45. When the cover plate 4 closes the receiving groove 14, the rotating part 41 and the operating part 42 are accommodated in the receiving groove 14. The flat area 45 is kept flat with the outside of the outer shell 1, that is, the flat area 45 is kept flat with the end face of the operating end 11. At this time, the cover plate 4 and the outer shell 1 form an integral structure. The cover plate 4 simultaneously serves as a pulling member and an unlocking mechanism. Moreover, it can be retracted into the receiving groove 14 without occupying space. It has the advantages of simple structure, beautiful appearance and convenient pulling.

[0061] The operating part 42 is a protrusion on one side of the cover plate 4. The operating part 42 has an operating hole 421 for accommodating tools. Other disassembly tools can also be connected through the operating hole 421, allowing for the application of greater pulling force. When the cover plate 4 is rotated to the open position, it faces the operating end 11 of the outer casing 1, and is used to apply pulling force or cooperate with disassembly tools to achieve pulling. Furthermore, multiple anti-slip ridges are provided on the surface of the operating part 42. Preferably, the side wall of the operating part 42 away from the rotating part 41 serves as a pushing surface 422, which has multiple anti-slip ridges. Operating the pushing surface 422 facilitates opening the cover plate 4.

[0062] Preferably, the rotating part 41 is rotatably connected to the housing 1 adjacent to the handle mechanism 2. The second driving part 43 can be located on the side of the rotating part 41 away from the operating part 42. The second driving part 43 can be a boss or a rod-shaped structure. An opening communicating with the interior of the mounting cavity 101 is provided at one end of the receiving groove 14. The rotating part 41 is connected to this opening, allowing the second driving part 43 to extend into the interior of the mounting cavity 101 and cooperate with the locking mechanism. Preferably, the opening is located on the side closer to the handle mechanism 2. When the cover plate 4 is closed on the receiving groove 14, the operating part 42 is located at the end of the receiving groove 14 away from the handle mechanism 2, and the rotating part 41 is located between the handle mechanism 2 and the operating part 42. Alternatively, the rotating part 41 can be located on the side away from the handle mechanism 2, and when the cover plate 4 is closed on the receiving groove 14, the operating part 42 is located between the rotating part 41 and the handle mechanism 2. However, this arrangement is less convenient for operation.

[0063] Specifically, the cover plate 4 drives the circuit breaker poles to open via the handle mechanism 2. A tripping drive unit is located at the end of the cover plate 4 near the handle mechanism 2. When the cover plate 4 rotates from the retracted position to the open position, the tripping drive unit drives the handle mechanism 2, which is in the closed position, to rotate from the closed position to the open position, thus tripping the circuit breaker poles. Simultaneously, the cover plate 4 drives the locking mechanism to unlock, and the handle mechanism 2 also drives the circuit breaker poles to open, preventing the circuit breaker poles from remaining in the closed state after the cover plate 4 is opened, thereby avoiding pulling operations while the circuit breaker is energized and improving electrical safety. In this embodiment, the tripping drive unit is formed from the area of ​​the planar region 45 near the end of the handle mechanism 2.

[0064] In addition, a third elastic element 5 is provided between the cover plate 4 and the outer shell 1. The third elastic element 5 is coaxially and rotatably assembled with the cover plate 4. The two elastic arms of the third elastic element 5 cooperate with the cover plate 4 and the outer shell 1 respectively to provide a restoring force for the cover plate 4 and drive the cover plate 4 to rotate towards the retraction position, that is, towards the closing receiving groove 14.

[0065] Combination Figures 3-12 A first embodiment of a multi-pole circuit breaker is provided, wherein the multi-pole circuit breaker in this embodiment is a two-pole circuit breaker.

[0066] A handle hole and a receiving half-groove are respectively provided on the end face of the operating end 11, and the receiving half-groove is located on one side of the handle mechanism 2. Figure 6 Located on the left side of the handle mechanism 2, when the housings 1 of the two circuit breaker poles are assembled, the receiving half-grooves of the housings 1 of the two circuit breaker poles are spliced ​​to form the receiving groove 14. The handle hole is located on the side of the end face of the operating end 11 away from the limiting hole 13, and the receiving groove 14 is located on the side of the end face of the operating end 11 close to the limiting hole 13. A first connecting part is provided on the inner side wall of the housing 1 below the handle hole. The handle mechanism 2 includes a handle body, which includes an integrally formed rotating connecting part and a handle part. The rotating connecting part is rotatably engaged with the first connecting part, and the handle part is connected to one side of the rotating connecting part and extends out of the housing 1 from the handle hole. The handle parts of two adjacent handle mechanisms 2 are linked and connected by a third linkage shaft. The second elastic element 20 is preferably a torsion spring coaxially assembled with the handle mechanism 2. The second elastic element 20 is rotatably assembled with the handle mechanism 2 coaxially, and the two elastic arms of the second elastic element 20 are respectively engaged with the handle mechanism 2 and the housing 1 to provide a restoring force for the handle mechanism 2. Of course, the second elastic element 20 can also be a tension spring, compression spring, or other elastic parts.

[0067] The receiving groove 14 has an opening at one end near the handle mechanism 2. The opening communicates with the interior of the mounting cavity 101. A connecting hole 15 is provided at the opening, and a connecting shaft 46 is installed in the connecting hole 15 so that the cover plate 4 and the third elastic member 5 are coaxially mounted on the connecting shaft 46. After the cover plate 4 and the third elastic member 5 are installed, the opening can be covered, or the opening can be covered by other structures of the outer shell 1, allowing only the second driving part 43 that can drive the locking mechanism to extend into, preventing foreign objects from entering the interior of the outer shell 1. The bottom wall end of the receiving groove 14 near the opening is used to abut against one elastic arm of the third elastic member 5. The bottom of the receiving groove 14 away from the opening is recessed to form an arc-shaped recess. The arc-shaped recess can correspond to the operating part 42 of the cover plate 4, so that when the cover plate 4 is closed on the receiving groove 14, the cover plate 4 and the outer side of the outer shell 1 remain flat. The end of the receiving groove 14 away from the handle mechanism 2 is open and closed by the cover plate 4.

[0068] The linkage 7 includes an integrally formed linkage body and a first driving part 71. The linkage body is a circular block structure, and the first driving part 71 is a boss structure with radial protrusions from the linkage body. The linkage 7 is coaxially and synchronously rotated with the handle mechanisms 2 of the two circuit breaker poles. The linkage 7 is connected to the handle mechanisms 2 of the two circuit breaker poles respectively through a first linkage shaft 8. The first linkage shaft 8 is an independent shaft. The center of the linkage body of the linkage 7 and the center of the rotating connection part of the handle mechanism 2 of the two circuit breaker poles are provided with linkage shaft holes that mate with the first linkage shaft 8. The linkage 7 is fitted onto the first linkage shaft 8 through the linkage shaft holes, and the two ends of the first linkage shaft 8 are respectively inserted into the linkage shaft holes on the handle mechanisms 2 of the two circuit breaker poles, thereby realizing the synchronous rotation of the linkage 7 and the handle mechanisms 2 of the two circuit breaker poles. The cross-section of the first linkage shaft 8 is preferably square, but it can also be oblong or other shapes. Of course, as another embodiment, the linkage 7 may have a first linkage shaft 8 integrally provided on both sides, which is inserted into the linkage shaft hole on the handle mechanism 2 of the two circuit breaker poles respectively.

[0069] In this embodiment, the locking mechanism is correspondingly disposed below the receiving groove 14. The locking mechanism includes an unlocking member 31 and a locking member 32, wherein the locking member 32 is disposed on one side of the limiting hole 13. In this embodiment, the locking member 32 is preferably slidably engaged with the outer shell 1, but it can also be rotatably connected to the outer shell 1. The locking member 32 is provided with a locking part 321 and a mating part 322. The locking member 32 is driven by the first elastic member 33 to extend the locking part 321 out of the limiting hole 13. At this time, the locking mechanism is in a locked state. The unlocking member 31 is rotatably assembled between the linkage member 7 and the locking member 32. The unlocking member 31 is provided with a first unlocking part 311. When the cover plate 4 is rotated to the open position, the second driving part 43 of the cover plate 4 cooperates with the second unlocking part 312 to drive the unlocking member 31 to rotate. The unlocking member 31 drives the locking member 32 through the third driving part 313, causing the locking part 321 to retract into the mounting cavity 101. At this time, the locking mechanism is in the unlocked state. When the handle mechanism 2 is rotated to the unlocked position, it drives the linkage 7 to drive the unlocking member 31 to rotate through the first driving part 71 and the first unlocking part 311, so that the third driving part 313 drives the cooperating part 322 to drive the locking part 321 to retract into the mounting cavity 101.

[0070] Of course, as other embodiments, the locking mechanism can also be integrated with the unlocking member 31 and the locking member 32; or the locking mechanism can be without the unlocking member 31, and the unlocking mechanism can directly drive the locking member 32 to drive the locking part 321 to retract into the mounting cavity 101; or the locking member 32 can be omitted, and the locking part 321 can be disposed on the unlocking member 31, and the locking part 321 can be disposed by extending directly from the unlocking member 31 towards the limiting hole 13, and the first elastic member 33 can drive the unlocking member 31 to make the locking part 321 extend out of the limiting hole 13, so that the locking mechanism enters the locked state. All of these are within the protection scope of this application.

[0071] Preferably, a stop portion 102 is provided in the mounting cavity 101, and the third driving portion 313 of the unlocking member 31 is located between the mating portion 322 and the stop portion 102. The unlocking member 31 drives the locking member 32 to retract the locking portion 321 into the mounting cavity 101 by pushing the mating portion 322 with the third driving portion 313. When the first elastic member 33 drives the locking member 32 to extend the locking portion 321 out of the limiting hole 13, the locking member 32 pushes the third driving portion 313 with the mating portion 322 until it abuts against the stop portion 102. By limiting the movement of the unlocking member 31 and the locking member 32 through the limiting engagement of the third driving portion 313 of the unlocking member 31 with the stop portion 102 and the mating portion 322 of the locking member 32, the reliability of the locking and unlocking functions of the locking mechanism is improved.

[0072] Specifically, such as Figure 7As shown, a second connecting part 162 is provided between the limiting hole 13 and the receiving groove 14. The second connecting part 162 corresponds to the lower part of the receiving groove 14. The unlocking member 31 is rotatably connected to the outer shell 1 through the second connecting part 162. At least one side of the limiting hole 13 is provided with a sliding limiting part 103. The locking member 32 is slidably engaged with the sliding limiting part 103, so that the locking member 32 moves linearly on one side of the limiting hole 13 under the drive of the first elastic member 33 and the unlocking member 31. Of course, the sliding limiting part 103 may not be provided. The locking member 32 is rotatably assembled on one side of the limiting hole 13. The locking member 32 is driven to rotate by the first elastic member 33 and the unlocking member 31, so that the locking part 321 extends out of the limiting hole 13 or retracts into the mounting cavity 101.

[0073] A locking part 321 is provided on the side of the locking member 32 facing the limiting hole 13. The locking part 321 is a protruding boss structure that engages with the limiting hole 13. The engaging part 322 is a boss on one side of the locking member 32 that can engage with the third driving part 313 of the unlocking member 31. In addition, the unlocking member 31 is located below the receiving groove 14. A second unlocking part 312 is provided on the side of the unlocking member 32 facing the receiving groove 14. The second driving part 43 provided on the cover plate 4 can extend into the interior of the mounting cavity 101. The second driving part 43 and the second unlocking part 312 engage to drive the unlocking member 31 and then drive the locking member 32, causing the locking part 321 to retract into the mounting cavity 101. Of course, when the cover plate 4 does not have the second driving part 43, the locking member 32 can also be unlocked by the linkage 7 by swinging the handle mechanism 2 to the unlock position.

[0074] Combination Figure 4 and Figure 8 A specific structure of an unlocking component 31 is provided. The unlocking component 31 includes a first rotating arm and a second rotating arm. One end of the first rotating arm and the second rotating arm are connected to form an unlocking component rotating part 314, which rotatably engages with the second connecting part 162. The other end of the first rotating arm serves as the first unlocking part 311, which engages with the first driving part 71 of the linkage 7. A boss protrudes from the middle of the first rotating arm on the side facing the cover plate 4, and this boss serves as the second unlocking part 312. The other end of the second rotating arm serves as the third driving part 313, which abuts against the mating part 322 of the locking component 32. In the figure, the third driving part 313 is in contact with the mating part 322 of the inclined surface. It should be noted that the position of the second unlocking part 312 is related to the position of the second driving part 43, and the position of the second unlocking part 312 is not limited to the middle of the first rotating arm.

[0075] Combination Figure 4 and Figure 9A specific structure of a locking member 32 is provided. The locking member 32 is linearly slidable and is generally block-shaped. A locking part 321 is provided on the side of the locking member 32 facing the limiting hole 13. The locking part 321 is a boss protruding from one side of the locking member 32, making the side of the locking member 32 facing the limiting hole 13 generally convex. A clearance groove 323 is provided on the side of the locking member 32 facing the unlocking member 31 to avoid the third driving part 313 of the unlocking member 31. The third driving part 313 extends into the clearance groove 323. The side wall of the clearance groove 323 away from the locking part 321 serves as a mating part 322. A limiting notch 324 is provided on the side wall of the clearance groove 323 near the locking part 321. Figures 4-6 As shown, the first elastic element 33 is preferably a torsion spring. The first elastic element 33 is located within the area enclosed by the unlocking element 31, the locking element 32, and the side wall of the mounting cavity 101. A mounting post 104 is provided within this area. The first elastic element 33 is sleeved on the mounting post 104, and its two elastic arms abut against the limiting notch 324 of the locking element 32 and the inner side wall of the mounting cavity 101, respectively. This causes the first elastic element 33 to deform, driving the locking element 32 to slide within the mounting cavity 101. Of course, the first elastic element 33 can also be a tension spring, compression spring, or other elastic component.

[0076] Combination Figure 3 and Figure 10 A specific structure of a cover plate 4 is provided. The cover plate 4 includes a cover plate body. The width of the cover plate body is less than or equal to the sum of the widths of the end faces of the operating ends 11 of the two circuit breaker pole housings 1. An operating part 42 and a rotating part 41 are respectively provided at both ends of the cover plate body. The operating 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 without the rotating part 41 and the operating part 42 is a flat area 45. After the receiving groove 14 is covered, the flat area 45 keeps it flat with the outside of the housing 1. The rotating part 41 is a cylindrical boss protruding from one side of the cover plate body. A shaft hole 413 is provided axially in the rotating part 41. A connecting shaft 46 is fitted into the shaft hole 413 and the connecting hole 15 to rotatably mount the cover plate 4 onto the outer shell 1. A mounting groove 411 is provided in the middle of the rotating part 41, effectively dividing the rotating part 41 into two sections. A third elastic element 5 is fitted into the mounting groove 411. The third elastic element 5 is preferably a torsion spring located within the mounting groove 411 and sleeved on the connecting shaft 46. One elastic arm of the third elastic element 5 extends from the mounting groove 411 and abuts against the outer shell 1, while the other elastic arm abuts against the bottom wall of the mounting groove 411. A boss structure protrudes from the outer side of the rotating part 41 away from the operating part 42. This boss structure serves as the second driving part 43, used to cooperate with the second unlocking part 312 of the unlocking part 31. Of course, the third elastic element 5 can also be a tension spring, compression spring, or other elastic component.

[0077] The operating part 42 is an annular boss located on one side of the cover plate body. The central hole of the annular boss serves as the operating hole 421. The outer diameter of the operating part 42 is larger than the outer diameter of the rotating part 41, meaning that one side of the operating part 42 is more protruding. When the cover plate 4 is closed on the receiving groove 14, one side of the operating part 42 can abut against the arc-shaped recess of the receiving groove 14. After the cover plate 4 is opened, the disassembly tool can be inserted into the operating hole 421. The side wall of the operating part 42 away from the rotating part 41 serves as the pushing surface 422, which is the arc-shaped outer side wall of the operating part 42 away from the rotating part 41 in the figure. The pushing surface 422 is provided with multiple anti-slip protrusions.

[0078] In addition, one end of the plane area 45 serves as the tripping drive unit, which works in conjunction with the handle mechanism 2 to drive the handle mechanism 2 from the closed position to the tripping position. That is, the tripping drive unit is located at the end of the plane area 45 near the handle mechanism 2.

[0079] It should be noted that, as another embodiment, the end face of the operating end 11 of the outer shell 1 may not be provided with the receiving groove 14. In this case, the cover plate 4 is rotatably connected to the outer shell 1, which can be a detachable rotatable connection. In this case, the cover plate 4 of the above embodiment is rotatably connected to the outer shell 1 on the side of the handle mechanism 2, that is, the rotating part 41 is rotatably connected to the outer shell 1 on the side of the handle mechanism 2. The end face of the operating end 11 is provided with a through hole for the second driving part 43 to extend into the mounting cavity 101. Preferably, the operating part 42 protrudes from the side of the cover plate 4 facing away from the end face of the operating end 11. When the cover plate 4 is rotated to the retracted position, the cover plate 4 can be parallel to the end face of the operating end 11 to reduce the space occupied by the cover plate 4. If the operating part 42 still protrudes from the side of the cover plate 4 facing the end face of the operating end 11, when the cover plate 4 is parallel to the end face of the operating end 11, a certain gap is left between the cover plate 4 and the end face of the operating end 11. Alternatively, the end of the cover plate 4 away from the operating part 42 is attached to the end face of the operating end 11. When the cover plate 4 is parallel to the end face of the operating end 11, the operating part 42 is located outside the end face of the operating end 11, avoiding the end face of the operating end 11.

[0080] Combination Figure 13 and Figure 14A second embodiment of a multi-pole circuit breaker is provided. Unlike the first embodiment, the multi-pole circuit breaker in this embodiment is a four-pole circuit breaker, with two circuit breaker poles per group, forming two groups of circuit breaker poles. The two circuit breaker poles in the same group share a locking mechanism and a cover plate 4. That is, the four-pole circuit breaker has a total of two locking mechanisms and two cover plates 4. Of course, the multi-pole circuit breaker can also have more circuit breaker poles. Taking 2n circuit breaker poles as an example, a locking mechanism is provided between every two circuit breaker poles, and a cover plate 4 is provided on the operating end 11 face of the housing 1 of every two circuit breaker poles. That is, a total of n locking mechanisms and n cover plates 4 are provided. However, this does not mean that the number of poles in this embodiment can only be even. When the number of poles is odd, two circuit breaker poles are per group, and the two circuit breaker poles in the same group share a locking mechanism and a cover plate 4. A single circuit breaker pole can have its own locking mechanism and cover plate 4, or it can share a locking mechanism and cover plate 4 with an adjacent circuit breaker pole.

[0081] Of course, as another inferior embodiment, it is also possible that two adjacent circuit breaker poles are provided with a shared locking mechanism and a cover plate 4. That is to say, the circuit breaker pole located in the middle position and the two adjacent circuit breaker poles are provided with a shared locking mechanism and a cover plate 4. This will inevitably add some unnecessary structures to the circuit breaker, increase the assembly difficulty and production cost.

[0082] Furthermore, such as Figures 10-12 As shown, the multi-pole circuit breaker in this embodiment is provided with multiple cover plates 4, and the operating parts 42 of two adjacent cover plates 4 are linked together by a second linkage shaft 6. A linkage hole 47 is provided at the end of the operating part 42 of the cover plate 4 away from the rotating part 41. The second linkage shaft 6 can be installed in the linkage hole 47, and the two adjacent cover plates 4 are linked together by the second linkage shaft 6, which is beneficial for simultaneously pulling out multiple locking structures.

[0083] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0084] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A locking structure for a multi-pole circuit breaker, comprising at least two circuit breaker poles arranged side by side, each circuit breaker pole including a housing (1), the locking structure further comprising an unlocking mechanism and a locking mechanism, characterized in that: A mounting cavity (101) is provided between the housings (1) of at least two adjacent circuit breaker poles. The side wall of the mounting cavity (101) is provided with a limiting hole (13). The locking mechanism is installed in the mounting cavity (101). The locking mechanism is provided with a locking part (321) that extends out of the limiting hole (13). The unlocking mechanism can drive the locking mechanism to unlock, so that the locking part (321) retracts into the mounting cavity (101).

2. The locking structure of the multi-pole circuit breaker according to claim 1, characterized in that: The outer sides of the outer shells (1) of two adjacent circuit breaker poles are respectively provided with half-grooves. When the outer shells (1) of two adjacent circuit breaker poles are assembled closely, the half-grooves on the outer shells (1) of the two adjacent circuit breaker poles are spliced ​​together to form the mounting cavity (101).

3. The locking structure of the multi-pole circuit breaker according to claim 1, characterized in that: The operating end (11) of the outer casing (1) is rotatably equipped with a handle mechanism (2). The handle mechanism (2) can be rotated to the closed position and the open position. The handle mechanism (2) serves as an unlocking mechanism. When the handle mechanism (2) is rotated to the closed position, the handle mechanism (2) drives the circuit breaker to close. When the handle mechanism (2) is rotated to the open position, the handle mechanism (2) drives the circuit breaker to open. The handle mechanism (2) can be rotated to the unlock position. The open position is located between the closed position and the unlock position. When the handle mechanism (2) rotates from the open position to the unlock position, it drives the locking mechanism to unlock.

4. The locking structure of the multi-pole circuit breaker according to claim 3, characterized in that: The handle mechanism (2) drives the locking mechanism to unlock via the linkage (7). The linkage (7) is connected to the handle mechanisms (2) of the two adjacent circuit breaker poles. The linkage (7) is installed in the mounting cavity (101). When the handle mechanism (2) rotates from the open position to the unlock position, it drives the linkage (7) to drive the locking mechanism to unlock.

5. The locking structure of the multi-pole circuit breaker according to claim 4, characterized in that: The linkage (7) is connected to the handle mechanism (2) of the two circuit breaker poles through the first linkage shaft (8). The linkage (7) and the handle mechanism (2) of the two circuit breaker poles are coaxial and rotate synchronously.

6. The locking structure of the multi-pole circuit breaker according to claim 3, characterized in that: The handle mechanism (2) is integrally provided with a handle protrusion that extends into the mounting cavity (101). When the handle mechanism (2) rotates from the open position to the unlock position, the handle protrusion drives the locking mechanism to unlock.

7. The locking structure of the multi-pole circuit breaker according to claim 3, characterized in that: Each of the two adjacent circuit breaker poles includes a second elastic element (20), which is used to drive the handle mechanism (2) to rotate from the unlocked position to the open position. The locking mechanism includes a first elastic element (33), which is used to drive the locking mechanism to make the locking part (321) extend out of the limiting hole (13). When the handle mechanism (2) rotates from the open position to the unlocked position against the force of the second elastic element (20), it drives the locking mechanism to unlock against the force of the first elastic element (33). The force value of the first elastic element (33) is greater than the sum of the force values ​​of the second elastic elements (20) of the two adjacent circuit breaker poles.

8. The locking structure of the multi-pole circuit breaker according to claim 1 or 3, characterized in that: It also includes a pull-out mechanism shared by two adjacent circuit breaker poles. The pull-out mechanism includes a cover plate (4). The cover plate (4) is rotatably connected to the operating end (11) of the outer shell (1) of the two adjacent circuit breaker poles. The cover plate (4) is provided with an operating part (42). The cover plate (4) rotates between the retracted position and the open position. When the cover plate (4) is rotated to the retracted position, the operating part (42) is close to the end face of the operating end (11). When the cover plate (4) is rotated to the open position, the operating part (42) is away from the end face of the operating end (11) for pulling out the circuit breaker.

9. The locking structure of the multi-pole circuit breaker according to claim 8, characterized in that: The cover plate (4) serves as an unlocking mechanism and is equipped with a second driving unit (43). When the cover plate (4) rotates from the retracted position to the open position, the locking mechanism is unlocked by the second driving unit (43).

10. The locking structure of the multi-pole circuit breaker according to claim 8, characterized in that: The cover plate (4) drives the circuit breaker poles to open via the handle mechanism (2). The end of the cover plate (4) near the handle mechanism (2) is provided with a tripping drive unit. When the cover plate (4) rotates from the retracted position to the open position, the tripping drive unit drives the handle mechanism (2) to trip the circuit breaker poles.

11. The locking structure of the multi-pole circuit breaker according to claim 9, characterized in that: A receiving groove (14) is provided at the connection of the end faces of the operating ends (11) of the two adjacent circuit breaker pole housings (1). When the cover plate (4) is rotated to the retraction position, the receiving groove (14) is closed. The cover plate (4) has a rotating part (41) at the end away from the operating part (42). The receiving groove (14) has an opening that communicates with the interior of the mounting cavity (101). The rotating part (41) is connected to the opening. A boss as a second driving part (43) protrudes from the side of the rotating part (41) away from the operating part (42).

12. The locking structure of the multi-pole circuit breaker according to claim 8, characterized in that: Multiple cover plates (4) are provided, and the operating parts (42) of two adjacent cover plates (4) are linked together through the second linkage shaft (6).

13. The locking structure of the multi-pole circuit breaker according to claim 1, characterized in that: The locking mechanism includes a locking member (32), which has a locking part (321). The locking member (32) is linearly disposed in the mounting cavity (101). A first elastic member (33) drives the locking member (32) to move linearly so that the locking part (321) extends out of the limiting hole (13). Alternatively, the locking member (32) is rotatably disposed in the mounting cavity (101), and the first elastic member (33) drives the locking member (32) to rotate so that the locking part (321) extends out of the limiting hole (13).

14. The locking structure of the multi-pole circuit breaker according to claim 1, characterized in that: The locking mechanism includes an unlocking component (31) and a locking component (32). The locking component (32) is provided with the locking part (321). The first elastic element (33) drives the locking component (32) to extend the locking part (321) out of the limiting hole (13). The unlocking component (31) is provided with a third driving part (313). The unlocking mechanism drives the unlocking component (31) to rotate. The unlocking component (31) drives the locking component (32) through the third driving part (313) to overcome the force of the first elastic element (33) and cause the locking part (321) to retract into the mounting cavity (101).

15. The locking structure of the multi-pole circuit breaker according to claim 14, characterized in that: The locking member (32) is provided with a mating part (322), and the mounting cavity (101) is provided with a stop part (102). The third driving part (313) is located between the mating part (322) and the stop part (102). The unlocking member (31) pushes the mating part (322) through the third driving part (313) to drive the locking member (32) to retract the locking part (321) into the mounting cavity (101). When the first elastic member (33) drives the locking member (32) to extend the locking part (321) out of the limiting hole (13), the locking member (32) pushes the third driving part (313) through the mating part (322) to abut against the stop part (102).

16. The locking structure of the multi-pole circuit breaker according to claim 14, characterized in that: The locking member (32) is linearly slidably disposed. A locking part (321) is provided on the side of the locking member (32) facing the limiting hole (13). The locking part (321) is a boss protruding on one side of the locking member (32). A clearance groove (323) is provided on the side of the locking member (32) facing the unlocking member (31) to avoid the third driving part (313) of the unlocking member (31). The side wall of the clearance groove (323) away from the locking part (321) serves as a mating part (322).

17. A multi-pole circuit breaker, characterized in that: Includes the locking structure of the multi-pole circuit breaker as described in any one of claims 1-16.

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