circuit breaker
By designing a pluggable circuit breaker structure and a handle locking mechanism, the problem of difficult replacement of molded case circuit breakers was solved, enabling rapid replacement and reliable electrical connection, and reducing safety risks and costs.
Patent Information
- Application Number
- CN202520286167.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-02-21
AI Technical Summary
The existing molded case circuit breakers are densely packed at the connection points with the incoming busbars, resulting in difficult and time-consuming replacements. This also increases the risks associated with working at heights and the safety hazards of unstable electrical connections.
A circuit breaker comprising a mounting base, a circuit breaker body, and a handle has been designed. Electrical connection is achieved through plug-in and plug-out engagement. The locking mechanism of the handle facilitates quick replacement of the circuit breaker body and ensures reliable electrical connection after replacement.
It shortens circuit breaker replacement time, reduces the risk of working at heights, improves the reliability and safety of electrical connections, reduces space occupation, and lowers costs.
Smart Images
Figure CN223612334U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power equipment technical field especially relates to a circuit breaker. BACKGROUND
[0002] The low-voltage comprehensive distribution box for rural power grid is used as the total distribution control box of the transformer area, and has more internal components, compact structure and complexity, wherein the residual current protection circuit breaker (hereinafter referred to as the molded case circuit breaker) as the total control switch of the branch circuit is generally installed through bolts, and the molded case circuit breaker is directly connected with the incoming line end busbar and the outgoing line end wire.
[0003] Since the copper bars are densely arranged at the connection between the molded case circuit breaker and the incoming line end busbar, and the space is small, when the molded case circuit breaker needs to be replaced, it is difficult for the hand to reach in, resulting in high difficulty in removing the connection between the molded case circuit breaker and the incoming line end busbar and connecting the new molded case circuit breaker and the incoming line end busbar, long time consumption, and more than 4 hours required for replacing a molded case circuit breaker, causing long-time power failure and easy user complaints. Moreover, the distribution box is high above the ground, and needs to use a ladder to operate, resulting in high safety risk of the operating personnel due to long-time high-altitude operation. In addition, when installing the new molded case circuit breaker, the incoming line end busbar screw is easily not tightened due to small operation space, resulting in high temperature rise during work, and even burning the entire distribution box.
[0004] Therefore, it is urgent to provide a circuit breaker to solve the above technical problems. UTILITY MODEL CONTENTS
[0005] The utility model provides a circuit breaker, which can realize quick plug-in replacement, shorten the maintenance time, reduce the safety risk of the operating personnel, and ensure the reliability of the electrical connection after replacement.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] The circuit breaker comprises:
[0008] A mounting base;
[0009] A circuit breaker body in plug-in cooperation with the mounting base, wherein one side of the circuit breaker body away from the mounting base is provided with a lock body;
[0010] A handle comprising a gripping portion and a locking mechanism arranged on the gripping portion, wherein the locking mechanism can be locked with the lock body to pull out the circuit breaker body from the mounting base through the gripping portion, and can be unlocked with the lock body to separate the handle from the circuit breaker body.
[0011] Optionally, the circuit breaker body comprises a middle cover and a surface cover connected with the middle cover, one end of the lock body is connected with the middle cover, and the other end is arranged in a avoiding hole of the surface cover, and the end of the lock body penetrating out of the surface cover is used for locking and unlocking with the locking mechanism.
[0012] Optionally, an annular flange is arranged at the outer edge of the avoiding hole on the side of the surface cover facing the middle cover, the annular flange is sleeved on the outside of the lock body and abuts against the middle cover, so as to insulate and protect the lock body.
[0013] Optionally, the locking mechanism comprises a lock holder connected with the holding part, the lock holder is provided with a locking hole, and a locking piece is arranged in the locking hole, the bottom wall of the locking piece away from the holding part and the locking hole form an assembly hole, the bottom wall of the locking piece is provided with a clamping hole communicating with the assembly hole, and the bottom wall of the locking piece is provided with clamping edges close to the two sides of the clamping hole, the opposite two sides of the lock body are provided with clamping grooves corresponding to the clamping edges, and the lock body can be clamped with the clamping grooves and the corresponding clamping edges through the assembly hole.
[0014] Optionally, the locking piece further comprises side walls connected with the two sides of the bottom wall and surrounding the bottom wall to form a "U" shape, the top of each side wall is provided with a turn-up edge, and the two side walls are arranged on the opposite two inner walls of the locking hole, and the two turn-up edges are arranged at the outer edge of the locking hole.
[0015] Optionally, a hand cover plate is arranged between the holding part and the lock holder, the middle part of the hand cover plate is provided with two parallel and spaced blocking edges, the lock holder is arranged between the two blocking edges, and the two sides of the hand cover plate are bent towards the holding part to form protection edges.
[0016] Optionally, the lock holder is further provided with a fitting groove communicating with the locking hole, and the locking mechanism further comprises a lock holding assembly, the lock holding assembly comprises:
[0017] a limiting plate rotationally connected with the lock holder, a first end of the limiting plate is located in the fitting groove, a second end of the limiting plate is located in the locking hole, the limiting plate has an unlocking working state and a locking working state; when the limiting plate is in the unlocking working state, the lock body can be clamped into the clamping edge through the assembly hole or removed from the assembly hole by releasing the clamping with the clamping edge; when the limiting plate is in the locking working state, the limiting plate abuts against the side surface of the lock body to limit the movement of the lock body;
[0018] a first elastic piece arranged in the fitting groove and abutting against the first end of the limiting plate, the first elastic piece can keep the limiting plate in the locking working state under the action of elastic force;
[0019] The holding part is provided with a through hole communicated with the accessory slot, and the button is slidingly assembled in the through hole, the button and the first elastic member are oppositely arranged and respectively located at opposite sides of the limiting plate, and the button can push the first end of the limiting plate to rotate so that the limiting plate moves from the locking working state to the unlocking working state.
[0020] Optionally, the circuit breaker body is provided with a plurality of lock bodies, the lock rack is provided with the locking holes corresponding to the lock bodies one by one, and at least one side of each locking hole is provided with the accessory slot, and each accessory slot is provided with one lock holding assembly.
[0021] Optionally, the through hole comprises a first section, a second section and a third section connected in sequence, the diameters of the first section and the third section are greater than that of the second section, the button comprises a head and a rod part connected with the head, the rod part is slidingly arranged in the through hole, the second elastic member is arranged in the first section and sleeved on the rod part and abuts against the head, and the end of the rod part away from the head is provided with a stop ring slidingly assembled in the third section.
[0022] Optionally, the shell rack current of the circuit breaker body is less than or equal to 250A.
[0023] Optionally, the mounting base is provided with an incoming power slot and an outgoing power slot, the incoming power slot is used for electrically connecting with the incoming wire conducting row, the outgoing power slot is used for electrically connecting with the outgoing wire conducting row, one side of the circuit breaker body is provided with an incoming wire end connecting column and an outgoing wire end connecting column, the incoming wire end connecting column is plug-in electrically connected with the incoming power slot, and the outgoing wire end connecting column is plug-in electrically connected with the outgoing power slot.
[0024] The utility model discloses beneficial effects:
[0025] The utility model provides a kind of circuit breaker, including mounting base, circuit breaker body and handle. Mounting base is used for with incoming wire conducting row and outgoing wire conducting row electrically connected, circuit breaker body and mounting base plug-in cooperation, to realize the electrical connection of circuit breaker body and incoming wire conducting row and outgoing wire conducting row by mounting base, so set, when needing to replace circuit breaker body, just circuit breaker body is pulled out from mounting base, then insert new circuit breaker, no need to remove the connection of incoming wire conducting row and outgoing wire conducting row, greatly shorten the time of replacing circuit breaker body, reduce the security risk of operating personnel, and, replacing circuit breaker body will not affect the connection of incoming wire conducting row and outgoing wire conducting row, guarantee the reliability of electrical connection after replacing circuit breaker body, to improve the safety of circuit breaker work further.
[0026] The handle capable of locking and unlocking the circuit breaker body is arranged to assist the connection of the circuit breaker body and the mounting base, on the one hand, the plug-in replacement of the circuit breaker body in a smaller operation space is facilitated, on the other hand, a plurality of circuit breaker bodies in the distribution box can share one handle, and the cost is lower, and on the other hand, the handle is separated from the circuit breaker body after the replacement of the circuit breaker body, so that the handle does not occupy the space in the distribution box, and the space utilization of the distribution box is improved. BRIEF DESCRIPTION OF DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and the drawings.
[0028] Figure 1 is a disassembled schematic view of the circuit breaker provided by the embodiments of the present application;
[0029] Figure 2 is a partial sectional view of the circuit breaker provided by the embodiments of the present application;
[0030] Figure 3 is a structural schematic view of the lock body provided by the embodiments of the present application;
[0031] Figure 4 is a structural schematic view of the middle cover provided by the embodiments of the present application;
[0032] Figure 5 is a structural schematic view of the surface cover provided by the embodiments of the present application;
[0033] Figure 6 is a structural schematic view of the handle in one perspective provided by the embodiments of the present application;
[0034] Figure 7 is a structural schematic view of the handle in another perspective provided by the embodiments of the present application;
[0035] Figure 8 is a partial view of an assembly drawing of the lock frame and the locking piece provided by the embodiments of the present application;
[0036] Figure 9 is a partial view of a disassembled schematic view of the lock frame and the locking piece provided by the embodiments of the present application;
[0037] Figure 10 is a sectional view of the handle provided by the embodiments of the present application;
[0038] Figure 11is the cooperation schematic view of the handle and the lock body when the limiting plate is in the unlocking working state;
[0039] Figure 12 is the cooperation schematic view of the handle and the lock body when the limiting plate is in the locking working state.
[0040] In the figure,
[0041] 10, incoming wire conductive row; 20, outgoing wire conductive row;
[0042] 100, mounting base; 110, incoming power socket; 120, outgoing power socket;
[0043] 200, circuit breaker body; 201, middle cover; 202, surface cover; 2021, avoiding hole; 2022, annular flange; 210, lock body; 211, clamping groove; 220, incoming wire end connecting column; 230, outgoing wire end connecting column;
[0044] 300, handle; 310, holding part; 320, locking mechanism; 321, lock frame; 3211, locking hole; 3212, accessory groove; 3213, fixing groove; 322, locking piece; 3221, bottom wall; 32211, clamping hole; 32212, clamping edge; 3222, side wall; 3223, flange; 323, assembly hole; 324, limiting plate; 325, first elastic piece; 326, button; 3261, head part; 3262, rod part; 327, second elastic piece; 328, retaining ring; 330, hand cover plate; 331, retaining edge; 332, guard edge. DETAILED DESCRIPTION
[0045] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used for explaining the utility model, and not limiting the utility model. In addition, it needs to be explained that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.
[0046] In the description of the utility model, unless another explicit provision and limitation, the term "linking", "connection", "fixing" should be broad-sense understanding, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly linked, can also be indirectly linked through intermediate medium, can be the intercommunication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.
[0047] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.Moreover, first feature is in second feature "on", "above" and "upper surface" include that first feature is in second feature directly above and obliquely above, or only indicate that first feature horizontal height is higher than second feature.First feature is in second feature "under", "below" and "under surface" include that first feature is in second feature directly below and obliquely below, or only indicate that first feature horizontal height is less than second feature.
[0048] In the description of the embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.
[0049] The embodiment provides a circuit breaker, which can realize quick plug-in replacement, shortens maintenance time, reduces safety risk of operating personnel, and can guarantee electrical connection reliability after replacement.
[0050] Specifically, as shown in Figure 1 And Figure 2 The circuit breaker comprises a mounting base 100, a circuit breaker body 200 and a handle 300.The circuit breaker body 200 is in plug-in cooperation with the mounting base 100, and the circuit breaker body 200 is provided with a lock body 210 on the side away from the mounting base 100.The handle 300 comprises a holding part 310 and a locking mechanism 320 arranged on the holding part 310, the locking mechanism 320 can be locked with the lock body 210, so as to pull out the circuit breaker body 200 from the mounting base 100 through the holding part 310, and can be unlocked with the lock body 210, so as to separate the handle 300 from the circuit breaker body 200.
[0051] When the circuit breaker is applied to the distribution box, the mounting base 100 is electrically connected with the incoming conductor strip 10 and the outgoing conductor strip 20 in the distribution box, and the circuit breaker body 200 is electrically connected with the incoming conductor strip 10 and the outgoing conductor strip 20 through the plug-in cooperation with the mounting base 100. In this way, when the circuit breaker body 200 needs to be replaced, the circuit breaker body 200 is only needed to be pulled out of the mounting base 100 and then a new circuit breaker is inserted, without the need to remove the connection of the incoming conductor strip 10 and the outgoing conductor strip 20, so that the time for replacing the circuit breaker body 200 is greatly shortened, the safety risk of the operator is reduced, and the replacement of the circuit breaker body 200 will not affect the connection of the incoming conductor strip 10 and the outgoing conductor strip 20, so that the reliability of the electrical connection after the replacement of the circuit breaker body 200 is ensured, and the safety of the work of the circuit breaker is improved.
[0052] In addition, the circuit breaker provided by the embodiment further includes a handle 300. When the circuit breaker body 200 needs to be replaced, the operator holds the handle part 310 of the handle 300 to lock the locking mechanism 320 of the handle 300 with the lock body 210 on the circuit breaker body 200, and then pulls the circuit breaker body 200 out of the mounting base 100 with force. After the circuit breaker body 200 is pulled out, the locking mechanism 320 is unlocked with the circuit breaker body 200 after the circuit breaker body 200 is moved to the storage position. Then, the operator keeps holding the handle part 310 to find a new circuit breaker body 200, locks the locking mechanism 320 with the lock body 210 on the new circuit breaker body 200, moves the new circuit breaker body 200 through the handle 300 and inserts the new circuit breaker body 200 into the mounting base 100, unlocks the locking mechanism 320 with the circuit breaker body 200 after the installation of the new circuit breaker body 200 is completed, and then takes away the handle 300 for storage, so that the replacement of the circuit breaker body 200 is completed.
[0053] The handle 300 that can be locked and unlocked with the circuit breaker body 200 is arranged to assist the connection of the circuit breaker body 200 with the mounting base 100. On the one hand, the plug-in replacement of the circuit breaker body 200 in a smaller operation space is facilitated. On the other hand, a plurality of circuit breaker bodies 200 in the distribution box can share one handle 300, so that the cost is lower. On the other hand, after the replacement of the circuit breaker body 200 is completed, the handle 300 is separated from the circuit breaker body 200, so that the handle 300 does not occupy the space in the distribution box, and the space utilization of the distribution box is improved.
[0054] Optionally, the shell current of the circuit breaker body 200 is less than or equal to 250A. The circuit breaker body 200 with the shell current less than or equal to 250A has moderate weight, and is not laborious to be plugged in and pulled out by the handle 300.
[0055] Optionally, continuing to refer to Figure 1The mounting base 100 is provided with an inlet slot 110 and an outlet slot 120. The inlet slot 110 is used for electrical connection with the inlet conductor 10, and the outlet slot 120 is used for electrical connection with the outlet conductor 20. One side of the circuit breaker body 200 is provided with an inlet connection post 220 and an outlet connection post 230. The inlet connection post 220 is plugged into the inlet slot 110, and the outlet connection post 230 is plugged into the outlet slot 120. The insertion and removal of the mounting base 100 and the circuit breaker body 200 are achieved through the cooperation of the inlet slot 110 and the inlet connection post 220, and the outlet slot 120 and the outlet connection post 230. The structure is simple and facilitates the installation and removal of the circuit breaker body 200 and the mounting base 100.
[0056] It is understandable that the number of power inlet slots 110 and power outlet slots 120 can be set according to the model of the circuit breaker body 200. For example, if the circuit breaker body 200 is a three-phase circuit breaker, then there are four power inlet slots 110 and four power outlet slots 120, which correspond one-to-one with the A, B, C, and N phases of the three-phase circuit breaker. Correspondingly, there are also four incoming line connection posts 220 and four outgoing line connection posts 230.
[0057] Furthermore, such as Figures 3-10 As shown, in this embodiment, the locking mechanism 320 includes a lock frame 321 connected to the grip portion 310. The lock frame 321 is provided with a locking hole 3211. A locking member 322 is installed in the locking hole 3211. The bottom wall 3221 of the locking member 322 away from the grip portion 310 and the locking hole 3211 form an assembly hole 323. The bottom wall 3221 of the locking member 322 is provided with a locking hole 32211 communicating with the assembly hole 323. The bottom wall 3221 of the locking member 322 forms locking edges 32212 on both sides near the locking hole 32211. The lock body 210 is provided with locking grooves 211 on opposite sides that correspond one-to-one with the locking edges 32212. The lock body 210 can engage the locking grooves 211 with the corresponding locking edges 32212 through the assembly hole 323.
[0058] The locking steps between the locking mechanism 320 and the lock body 210 are as follows:
[0059] First, hold the grip part 310 with your hand and move the handle 300 by your hand until the mounting hole 323 is aligned with the lock body 210.
[0060] Then, move the handle 300 so that the end of the lock body 210 with the slot 211 is inserted into the mounting hole 323 and the slot 211 is opposite to the locking edge 32212.
[0061] Finally, move the handle 300 again to engage the slot 211 with the corresponding edge 32212 until they are engaged, thus completing the locking of the locking mechanism 320 and the lock body 210.
[0062] The unlocking step of the locking mechanism 320 and the lock body 210 is as follows:
[0063] First, hold the holding part 310 with hands, drive the lifting handle 300 to move, and make the lock body 210 enter the assembly hole 323;
[0064] Then, move the lifting handle 300 again, make the lock body 210 out of the assembly hole 323, and the unlocking of the locking mechanism 320 and the lock body 210 is completed.
[0065] The locking mechanism 320 has simple structure, and the locking and unlocking operations of the locking mechanism 320 and the lock body 210 are relatively simple, which is beneficial to reduce the replacement difficulty of the circuit breaker body 200 and improve the replacement efficiency of the circuit breaker body 200.
[0066] Optionally, continuing to refer to Figure 2 , Figure 4 and Figure 5 , the circuit breaker body 200 comprises a middle cover 201 and a surface cover 202 connected with the middle cover 201, one end of the lock body 210 is connected with the middle cover 201, and the other end is arranged in the avoiding hole 2021 on the surface cover 202, and the end of the lock body 210 arranged out of the surface cover 202 is used for locking and unlocking with the locking mechanism 320. The connection structure of the lock body 210 and the circuit breaker body 200 is simple, and the structure of the circuit breaker body 200 does not need to be changed too much, and the cost is low.
[0067] In the embodiment, the end of the lock body 210 arranged out of the surface cover 202 is provided with a clamping groove 211, and the clamping groove 211 is used for cooperating with the locking piece 322 of the locking mechanism 320, so as to realize the locking and unlocking of the lock body 210 and the locking mechanism 320.
[0068] Further, continuing to refer to Figure 2 , Figure 4 and Figure 5 , the surface cover 202 is provided with an annular flange 2022 around the outer edge of the avoiding hole 2021 on the side of the surface cover 202 facing the middle cover 201, the annular flange 2022 is sleeved on the lock body 210 and abuts against the middle cover 201, so as to insulate and protect the lock body 210. By arranging the annular flange 2022 to insulate and protect the lock body 210, the lock body 210 can be prevented from contacting the parts in the circuit breaker body 200 to cause short circuit, and the safety of the circuit breaker body 200 in operation is improved.
[0069] Optionally, continuing to refer to Figure 7 and Figure 8In the embodiment, the locking piece 322 further comprises side walls 3222 connected to two sides of the bottom wall 3221 and surrounding the bottom wall 3221 to form a "Y" shape. The top of each side wall 3222 is provided with a flange 3223, and the two flanges 3223 extend in opposite directions. The two side walls 3222 are attached to the opposite inner walls of the locking hole 3211, and the two flanges 3223 are hung at the outer edge of the locking hole 3211. The locking piece 322 is hung on the lock holder 321 to achieve the connection between the locking piece 322 and the lock holder 321, which is simple in structure and convenient to assemble. After the lock holder 321 is connected to the holding part 310, the flanges 3223 are clamped between the lock holder 321 and the holding part 310, which can ensure the stability of the installation of the locking piece 322, and further ensure the reliability of the locking between the locking piece 322 and the lock body 210.
[0070] Further, with reference to Figure 2 、 Figure 6 and Figure 7 , the holding part 310 and the lock holder 321 are provided with a hand cover plate 330. The middle part of the hand cover plate 330 is provided with two parallel and spaced apart stop edges 331, and the lock holder 321 is clamped between the two stop edges 331. The two sides of the hand cover plate 330 are bent towards the holding part 310 to form a protective edge 332. The stop edges 331 can protect the lock holder 321. The protective edge 332 can protect the hands of the operator holding the holding part 310, reducing the risk of electric shock.
[0071] Optionally, the hand cover plate 330 can be made of transparent material with insulation performance.
[0072] Further, as shown in Figures 10-12 , the lock holder 321 is further provided with a fitting groove 3212 in communication with the locking hole 3211. The locking mechanism 320 further comprises a lock holding assembly for keeping the locking between the locking piece 322 and the lock body 210, avoiding the separation of the handle 300 and the circuit breaker body 200 during plugging, which affects the replacement of the circuit breaker body 200.
[0073] Specifically, the locking assembly includes a limiting plate 324, a first elastic element 325, and a button 326. The limiting plate 324 is rotatably connected to the lock frame 321. The first end of the limiting plate 324 is located within the accessory slot 3212, and the second end is located within the locking hole 3211. The limiting plate 324 has both an unlocking and a locking state. When the limiting plate 324 is in the unlocking state, the lock body 210 can engage with the locking edge 32212 through the mounting hole 323, or disengage from the locking edge 32212 and exit from the mounting hole 323. When the limiting plate 324 is in the locking state, it abuts against the side of the lock body 210 to restrict its movement. The first elastic element 325 is disposed within the accessory slot 3212 and abuts against the first end of the limiting plate 324. The first elastic element 325, under elastic force, keeps the limiting plate 324 in the locking state. The grip 310 has a through hole communicating with the accessory slot 3212. The button 326 is slidably mounted in the through hole. The button 326 and the first elastic member 325 are arranged opposite to each other and are located on opposite sides of the limiting plate 324. The button 326 can push the first end of the limiting plate 324 to rotate, so that the limiting plate 324 moves from the locked working state to the unlocked working state.
[0074] To facilitate understanding, the working process of the handle 300 equipped with a locking component will be briefly described below:
[0075] The locking process between the locking mechanism 320 and the lock body 210 is as follows:
[0076] First, hold the grip part 310 and insert the lock body 210 into the mounting hole 323;
[0077] Then, as Figure 11 As shown, moving the handle 300 to the left causes the lock body 210 to move to the right, enabling the slot 211 on the lock body 210 to engage with the corresponding edge 32212. During this process, the top of the lock body 210 will slide against the limiting plate 324 and push the second end of the limiting plate 324 upward to maintain the unlocked state. The first end of the limiting plate 324 will compress the first elastic element 325, allowing the first elastic element 325 to store elastic potential energy.
[0078] After that, as Figure 12 As shown, when the lock body 210 moves into position (for example, the lock body 210 abuts against the inner wall of the extension direction of the locking hole 32211), the lock body 210 separates from the limiting plate 324. At this time, the first elastic element 325 releases elastic potential energy, causing the second end of the limiting plate 324 to rotate downward and remain abutting against the side of the lock body 210, so as to restrict the lock body 210 from moving to the left and disengaging from the locking hole 32211.
[0079] The unlocking process between the locking mechanism 320 and the lock body 210 is as follows:
[0080] Firstly, press the button 326 downward, so that the button 326 pushes the first end of the limiting plate 324 to rotate downward, and the second end of the limiting plate 324 moves upward to release the abutment with the lock body 210, that is, the limiting plate 324 moves from the locking working state to the unlocking working state;
[0081] Then, move the handle 300 to the right, so that the lock body 210 enters the assembly hole 323 from the card hole 32211 to the left, in the process, the top end of the lock body 210 abuts and slides against the limiting plate 324, and after the lock body 210 enters the assembly hole 323, the lock body 210 can be pulled out.
[0082] Through the cooperation of the lock holding assembly and the button 326, the lock body 210 and the locking piece 322 are locked and released, the structure is simple, the operation is convenient, and the reliability and convenience of the handle 300 are improved.
[0083] Optionally, referring to Figure 8 and Figure 9 In the embodiment, the bottom of the accessory slot 3212 is provided with a fixing slot 3213 opposite to the through hole, and one end of the first elastic piece 325 is inserted into the fixing slot 3213. The first elastic piece 325 is fixed through the fixing slot 3213, which is simple in structure and convenient for processing and assembly of the first elastic piece 325.
[0084] It can be understood that the first elastic piece 325 can be selected but is not limited to a spring.
[0085] Optionally, referring to Figures 10-12 The circuit breaker body 200 can be provided with a plurality of lock bodies 210, the lock rack 321 is provided with a locking hole 3211 corresponding to each lock body 210, and at least one side of the locking hole 3211 is provided with an accessory slot 3212. Each accessory slot 3212 is provided with one lock holding assembly. Through the cooperation of the plurality of lock bodies 210 and the locking piece 322, the reliability of the connection between the handle 300 and the circuit breaker body 200 can be improved, and the risk of accidental falling and damage of the circuit breaker body 200 during plugging and unplugging the circuit breaker body 200 is reduced.
[0086] In the embodiment, the lock body 210 is provided with two, and the two lock bodies 210 are arranged in the width direction of the circuit breaker body 200. In other embodiments, the number and arrangement of the lock body 210 can also be other, which can be arranged according to actual needs, and the application is not limited.
[0087] Further, referring to Figures 10-12The through hole comprises a first section, a second section and a third section connected in sequence, the diameters of the first section and the third section are greater than the diameter of the second section, the button 326 comprises a head portion 3261 and a rod portion 3262 connected with the head portion 3261, the rod portion 3262 is slidingly arranged in the through hole, a second elastic member 327 is arranged in the first section, the second elastic member 327 is sleeved on the rod portion 3262 and abuts against the head portion 3261, an end of the rod portion 3262 away from the head portion 3261 is provided with a stop ring 328, and the stop ring 328 is slidingly assembled in the third section. By arranging the second elastic member 327, the automatic reset of the button 326 can be realized, and the operation convenience of unlocking the handle 300 is improved. By arranging the stop ring 328, the button 326 can be prevented from being separated from the through hole, and the assembly reliability of the button 326 is ensured.
[0088] It can be understood that the second elastic member 327 can be selected but is not limited to a spring.
[0089] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation on the embodiments of the utility model. For the ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be carried out without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A circuit breaker characterized by, The utility model relates to a circuit breaker, including: a mounting base (100); a circuit breaker body (200) pluggable with the mounting base (100), the circuit breaker body (200) is provided with a lock body (210) on the side away from the mounting base (100); a handle (300) including a holding part (310) and a locking mechanism (320) arranged on the holding part (310), the locking mechanism (320) can be locked with the lock body (210) to pull out the circuit breaker body (200) from the mounting base (100) through the holding part (310), and can be unlocked with the lock body (210) to separate the handle (300) from the circuit breaker body (200).
2. The circuit breaker of claim 1, wherein, The circuit breaker body (200) includes a middle cover (201) and a surface cover (202) connected with the middle cover (201), one end of the lock body (210) is connected with the middle cover (201), and the other end is arranged in the avoiding hole (2021) on the surface cover (202), and the end of the lock body (210) penetrating out of the surface cover (202) is used for locking and unlocking with the locking mechanism (320).
3. The circuit breaker of claim 2, wherein, On the side of the surface cover (202) facing the middle cover (201), an annular flange (2022) is arranged at the outer edge of the avoiding hole (2021), the annular flange (2022) is sleeved on the outside of the lock body (210) and abuts against the middle cover (201), so as to insulate and protect the lock body (210).
4. The circuit breaker of claim 1, wherein, The locking mechanism (320) includes a lock frame (321) connected with the holding part (310), the lock frame (321) is provided with a locking hole (3211), a locking piece (322) is arranged in the locking hole (3211), the bottom wall (3221) of the locking piece (322) away from the holding part (310) and the locking hole (3211) form an assembly hole (323), the bottom wall (3221) of the locking piece (322) is provided with a clamping hole (32211) in communication with the assembly hole (323), the bottom wall (3221) of the locking piece (322) is provided with a clamping edge (32212) on the two sides close to the clamping hole (32211), and the lock body (210) is provided with a clamping groove (211) corresponding to the clamping edge (32212) on the opposite two sides.
5. The circuit breaker of claim 4, wherein, The locking piece (322) further includes a side wall (3222) connected on the two sides of the bottom wall (3221) and surrounding the bottom wall (3221) to form a "U" shape, the top of each side wall (3222) is provided with a turn-up edge (3223), and the two side walls (3222) are arranged on the opposite two inner walls of the locking hole (3211), and the two turn-up edges (3223) are arranged at the outer edge of the locking hole (3211).
6. The circuit breaker of claim 4, wherein, A hand cover plate (330) is arranged between the holding part (310) and the lock holder (321), a middle part of the hand cover plate (330) is provided with two parallel and spaced apart stop edges (331), the lock holder (321) is clamped between the two stop edges (331), and both sides of the hand cover plate (330) are bent towards the holding part (310) to form a protection edge (332).
7. The circuit breaker of claim 4, wherein, The lock holder (321) is further provided with a fitting groove (3212) in communication with the locking hole (3211), the locking mechanism (320) further comprises a lock holding assembly, and the lock holding assembly comprises: A limiting plate (324) is rotationally connected to the lock holder (321), a first end of the limiting plate (324) is located in the fitting groove (3212), a second end of the limiting plate (324) is located in the locking hole (3211), the limiting plate (324) has an unlocking working state and a locking working state; when the limiting plate (324) is in the unlocking working state, the lock body (210) can be clamped into the clamping edge (32212) through the assembly hole (323) or disengaged from the clamping edge (32212) to be clamped out of the assembly hole (323); when the limiting plate (324) is in the locking working state, the limiting plate (324) abuts against a side surface of the lock body (210) to limit the movement of the lock body (210); A first elastic member (325) is arranged in the fitting groove (3212) and abuts against the first end of the limiting plate (324), and the first elastic member (325) can keep the limiting plate (324) in the locking working state under the action of elastic force; A button (326) is arranged in a through hole in communication with the fitting groove (3212) in the holding part (310), the button (326) is slidingly assembled in the through hole, the button (326) and the first elastic member (325) are oppositely arranged and located on opposite sides of the limiting plate (324) respectively, and the button (326) can push the first end of the limiting plate (324) to rotate, so that the limiting plate (324) moves from the locking working state to the unlocking working state.
8. The circuit breaker of claim 7, wherein, A plurality of lock bodies (210) are arranged on the circuit breaker body (200), the lock holder (321) is provided with the locking hole (3211) corresponding to the lock body (210) one by one, at least one side of the locking hole (3211) is provided with the fitting groove (3212), and each fitting groove (3212) is provided with one lock holding assembly.
9. The circuit breaker of claim 7, wherein, The through hole comprises a first section, a second section and a third section connected in sequence, the diameters of the first section and the third section are greater than the diameter of the second section, the button (326) comprises a head (3261) and a rod portion (3262) connected with the head (3261), the rod portion (3262) is slidingly arranged in the through hole, a second elastic member (327) is arranged in the first section, the second elastic member (327) is sleeved on the rod portion (3262) and abuts against the head (3261), an end of the rod portion (3262) away from the head (3261) is provided with a stop ring (328), and the stop ring (328) is slidingly assembled in the third section.
10. The circuit breaker of any one of claims 1-9, wherein, The shell frame current of the circuit breaker body (200) is less than or equal to 250 A.
11. The circuit breaker of any one of claims 1-9, wherein, The mounting base (100) is provided with an incoming power slot (110) and an outgoing power slot (120), the incoming power slot (110) is used for electrically connecting with an incoming wire conducting row (10), the outgoing power slot (120) is used for electrically connecting with an outgoing wire conducting row (20), one side of the circuit breaker body (200) is provided with an incoming wire end connecting column (220) and an outgoing wire end connecting column (230), the incoming wire end connecting column (220) is plug-in electrically connected to the incoming power slot (110), and the outgoing wire end connecting column (230) is plug-in electrically connected to the outgoing power slot (120).