A small circuit breaker

Abstract

The present application relates to the technical field of circuit breakers, and discloses a small circuit breaker, comprising a shell, a handle rotatably connected to the shell, a limit plate slidably connected to the shell, a limit bar provided on the limit plate, and a limit slot for inserting the limit bar on the handle; when the handle is in a circuit-off state, the limit bar can be inserted into the limit slot; when the handle is in a circuit-on state, the limit bar cannot be inserted into the limit slot. In the present application, when the handle is in a circuit-off state, the staff slides the limit plate to insert the limit bar into the limit slot, so that the limit bar limits the handle, allowing the handle to be fixed on the shell, thereby preventing the staff from accidentally touching the handle and causing the handle to rotate from the circuit-off state to the circuit-on state, making it less likely for the staff to be in danger during maintenance.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a miniature circuit breaker. Background Art

[0002] A circuit breaker is an electrical device used to protect and control circuits. A miniature circuit breaker is an AC circuit breaker. Miniature circuit breakers usually use bimetallic strips as temperature sensing elements, and trigger the tripping mechanism through temperature changes to open and close the circuit.

[0003] The circuit breaker in the related art includes a housing, in which electrical components are arranged. A handle is rotatably connected to the housing, and the handle is used to drive the electrical components. When the handle is rotated, the electrical components realize the power on and off of the circuit.

[0004] When the staff is repairing, the staff needs to turn the handle to disconnect the circuit. If the staff accidentally touches the handle during the repair process and the handle connects the circuit, it will be dangerous for the staff during the repair. Summary of the Invention

[0005] In order to improve the problem that a worker may accidentally touch a handle and cause circuit connection, the present application provides a small circuit breaker.

[0006] This application provides a miniature circuit breaker, which adopts the following technical solution:

[0007] A miniature circuit breaker comprises a housing, a handle rotatably connected to the housing, a limit plate slidably connected to the housing, a limit bar provided on the limit plate, and a limit slot for inserting the limit bar on the handle; when the handle is in a circuit-disconnected state, the limit bar can be inserted into the limit slot; when the handle is in a circuit-connected state, the limit bar cannot be inserted into the limit slot.

[0008] By adopting the above technical solution, when the handle is in the circuit-disconnected state, the staff slides the limit plate to allow the limit bar to be inserted into the limit groove, so that the limit bar limits the handle and the handle can be fixed on the shell, avoiding the staff from accidentally touching the handle and causing the handle to rotate from the circuit-disconnected state to the circuit-connected state, making it less likely for the staff to be in danger during the maintenance process.

[0009] Optionally, a card block is provided on the limit plate, and a card slot for inserting the card block is opened on the shell; when the limit bar is inserted into the limit slot, the limit plate is slid and the card block can be inserted into the card slot.

[0010] By adopting the above technical solution, the staff slides the limit plate to insert the limit bar into the limit groove, and then slides the limit plate to insert the card block into the card slot, so that the limit bar is not easily detached from the limit groove directly, thereby increasing the locking strength of the limit plate on the handle, making the handle difficult to rotate.

[0011] Optionally, a limit spring is provided on the shell, a moving block is provided on the limit spring, the moving block is slidably connected to the limit plate, and the limit spring drives the card block to be inserted into the card slot.

[0012] By adopting the above technical solution, a limit spring is arranged on the shell, and the moving block is slidably connected to the limit plate. When the limit plate slides, the moving block moves synchronously, so that the limit spring always drives the limit plate to apply force, making it difficult for the card block to disengage from the card slot, further increasing the stability of the limit bar in the limit slot; and the moving block is slidably connected to the limit plate, so that the limit spring is not easy to bend when applying force, so that the limit spring can stably apply force to the limit plate.

[0013] Optionally, the shell is provided with a receiving groove for the sliding of the limiting plate, the shell is slidably connected with a receiving plate, the receiving plate is provided with a fixing groove, and the limiting plate is slidably connected with a fixing bar for inserting into the fixing groove; when the fixing bar is inserted into the fixing groove, the receiving plate blocks the receiving groove; when the limiting bar is inserted into the limiting groove, the fixing bar is detached from the fixing groove.

[0014] By adopting the above technical solution, the staff slides the limit plate to allow the accommodating plate to block part of the opening of the accommodating groove, thereby realizing the installation of the limit plate. The staff slides the fixing bar to allow the fixing bar to be inserted into the fixing groove to realize the fixing bar limiting the accommodating plate, so that the accommodating plate can stably block the accommodating groove and prevent the limit plate from detaching from the opening of the accommodating groove; when the limit bar is inserted into the limit groove, the circuit breaker disconnects the circuit, the fixing bar detaches from the fixing groove, and the fixing bar releases the lock on the accommodating plate. Only then can the staff slide the accommodating plate, thereby preventing the staff from disassembling the circuit breaker when it is energized, thereby further improving the staff's operating safety.

[0015] Optionally, a through hole connected to the accommodating groove is provided on the shell, an operating strip is slidably connected in the through hole, an operating inclined surface is provided on the operating strip, the distance between the operating inclined surface and the accommodating plate gradually increases along the direction from the through hole to the accommodating groove, and the operating inclined surface is located on the moving path of the fixing strip; when the operating strip is located in the through hole, the fixing strip is inserted into the fixing groove.

[0016] By adopting the above technical solution, the staff slides the operating bar. Since the operating inclined surface is located on the moving path of the fixed bar, the operating inclined surface can drive the fixed bar to move, allowing the fixed bar to be inserted into the fixed groove, thereby realizing the position limitation of the fixed bar on the accommodating plate; at this time, the operating bar is located in the through-hole, and the staff can know whether the accommodating plate is locked by observing the height of the operating bar. At this time, the staff does not need to slide the accommodating plate to confirm whether the accommodating plate is locked.

[0017] Optionally, the shell includes an upper shell and a lower shell, the lower shell is provided with a mounting plate, the mounting plate is slidably connected to the mounting plate, the upper shell is provided with a placement groove for inserting the mounting plate, and the groove wall of the placement groove is provided with a mounting groove for inserting the mounting bar; when the mounting bar is inserted into the mounting groove, the upper shell is fixed to the lower shell.

[0018] By adopting the above technical solution, the upper shell is installed on the lower shell, the mounting plate is inserted into the placement groove, and then the staff slides the mounting bar and inserts the mounting bar into the mounting groove to realize the assembly of the upper shell and the lower shell.

[0019] Optionally, the mounting bar is located on the sliding path of the limiting plate, and when the limiting bar is inserted into the limiting groove, the mounting bar is inserted into the mounting groove.

[0020] By adopting the above technical solution, when the limit bar is inserted into the limit groove, the limit plate drives the installation bar to slide, allowing the installation bar to be smoothly inserted into the installation groove, thereby achieving the fixation of the upper shell and the lower shell; when the staff installs the upper shell and the lower shell, the staff needs to move the limit plate first to ensure that the limit plate can lock the handle, and the limit plate can drive the installation bar to move, allowing the installation bar to be inserted into the installation groove, thereby achieving the mutual fixation of the upper shell and the lower shell.

[0021] Optionally, a spring sheet is provided on the limiting plate, and the spring sheet can be inserted into the placement slot; when the mounting bar is inserted into the mounting slot, the spring sheet is located in the gap between the mounting bar and the wall of the placement slot.

[0022] By adopting the above technical solution, when the mounting bar is inserted into the mounting groove, there is a gap between the mounting bar and the wall of the placement groove. At this time, the spring piece can be located in the placement groove. When the limit plate moves, the spring piece abuts the mounting bar, allowing the mounting bar to be stably located in the mounting groove, avoiding the mounting bar from detaching from the mounting groove and causing the upper shell and the lower shell to be unreliably fixed.

[0023] Optionally, a locking bar is rotatably connected to the accommodating plate, and a locking groove for inserting the locking bar is provided on the shell; when the locking bar is inserted into the locking groove, the accommodating plate blocks the accommodating groove.

[0024] By adopting the above technical solution, the staff rotates the locking bar to insert the locking bar into the locking groove, so that the accommodating plate can block the accommodating groove, thereby allowing the fixing bar to be inserted into the fixing groove, preventing the accommodating plate from detaching from the accommodating groove when the fixing bar detaches from the fixing groove.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. When the handle is in the circuit-disconnected state, the staff slides the limit plate to insert the limit bar into the limit groove, so that the limit bar limits the handle and the handle can be fixed on the shell, avoiding the staff from accidentally touching the handle and causing the handle to rotate from the circuit-disconnected state to the circuit-connected state, making it less likely for the staff to be in danger during the maintenance process.

[0027] 2. A limit spring is provided on the shell, and the moving block is slidably connected to the limit plate. When the limit plate slides, the moving block moves synchronously, so that the limit spring always drives the limit plate to apply force, making it difficult for the card block to disengage from the card slot, further increasing the stability of the limit bar in the limit slot; and the limit spring is not easy to bend when applying force, so that the limit spring can stably apply force to the limit plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of an embodiment of the present application;

[0029] Figure 2 It is along Figure 1 Cross-sectional view along line AA;

[0030] Figure 3 This is a structural diagram highlighting the card block in the embodiment of the present application;

[0031] Figure 4 This is a structural diagram highlighting the movable slot in an embodiment of the present application;

[0032] Figure 5 yes Figure 2 Schematic diagram of the enlarged portion B.

[0033] Figure numerals: 1. Shell; 11. Upper shell; 12. Lower shell; 13. Mounting plate; 131. Mounting bar; 14. Placement slot; 141. Mounting slot; 15. Handle; 151. Limiting slot; 16. Accommodating slot; 161. Connecting slot; 163. Moving slot; 17. Locking slot; 18. Perforation; 181. Operating bar; 182. Operating inclined plane; 2. Limiting plate; 21. Spring piece; 22. Connecting bar; 221. Limiting bar; 222. Block; 223. Moving block; 224. Limiting spring; 225. Moving bar; 23. Fixed bar; 231. Fixed inclined plane; 3. Accommodating plate; 31. Locking bar; 32. Fixed slot. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] This embodiment discloses a miniature circuit breaker. Figure 1 A small circuit breaker includes a shell 1, in which electrical components are arranged, and the electrical components can realize the basic functions of the circuit breaker.

[0036] Reference Figure 2 The housing 1 comprises an upper shell 11 and a lower shell 12. A mounting plate 13 is fixedly connected to the lower shell 12, and a mounting bar 131 is slidably connected to the surface of the mounting plate 13 facing away from the lower shell 12. A placement slot 14 is defined on the surface of the upper shell 11 for inserting the mounting plate 13. The walls of the placement slot 14 are defined with a mounting slot 141 for inserting the mounting bar 131. Once the mounting plate 13 is inserted into the placement slot 14, a worker slides the mounting bar 131 into the mounting slot 141, completing the assembly of the upper and lower shells 11 and 12.

[0037] Reference Figure 2 A handle 15 is rotatably connected to the upper shell 11. A limit slot 151 is defined on the side of the handle 15 and extends along the length of the upper shell 11. A receiving slot 16 is defined on the upper shell 11 and extends through the side of the upper shell 11 along the length of the upper shell 11. A limit plate 2 is disposed within the receiving slot 16 and is capable of sliding within the slot 16.

[0038] Reference Figure 2 A spring plate 21 is fixedly connected to the surface of the limiting plate 2, and the spring plate 21 deforms in a direction away from the limiting plate 2. When the limiting plate 2 slides in the receiving groove 16, the limiting plate 2 can abut the mounting bar 131, allowing the mounting bar 131 to be inserted into the mounting groove 141. At this time, the spring plate 21 can be inserted into the gap between the mounting bar 131 and the groove wall of the placement groove 14, allowing the spring plate 21 to prevent the mounting bar 131 from leaving the mounting groove 141.

[0039] Reference Figure 2 and Figure 3 A connecting bar 22 is fixedly connected to the surface of the limiting plate 2. A connecting groove 161 is defined in the wall of the accommodating groove 16. The connecting groove 161 is for the connecting bar 22 to be inserted into. A limiting bar 221 is fixedly connected to the surface of the connecting bar 22. The limiting bar 221 can be inserted into the limiting groove 151. The surface of the limiting bar 221 near the handle 15 is an arc surface. When the handle 15 is in the circuit-off state, the limiting bar 221 can be inserted into the limiting groove 151. When the handle 15 is in the circuit-on state, the limiting bar 221 cannot be inserted into the limiting groove 151.

[0040] Reference Figure 2 and Figure 3 A clamping block 222 is fixedly connected to the surface of the connecting strip 22. The clamping block 222 extends along the length of the limiting plate 2. A clamping slot for the clamping block 222 is formed on the wall of the connecting groove 161. The clamping slot extends along the length of the limiting groove 151. When the clamping block 222 is inserted into the clamping slot, the limiting strip 221 is located in the limiting groove 151.

[0041] Reference Figure 3 and Figure 4 A moving block 223 is slidably connected to the surface of the connecting bar 22, and the moving block 223 slides in a direction perpendicular to the length of the limiting plate 2. A limiting spring 224 is fixedly connected to the surface of the moving block 223 away from the connecting bar 22, and a moving bar 225 is fixedly connected to the surface of the limiting spring 224 away from the moving block 223. A moving groove 163 is defined in the wall of the connecting groove 161 for the moving bar 225 to slide. When the limiting plate 2 is installed in the accommodating groove 16, the moving bar 225 is located in the moving groove 163.

[0042] Reference Figure 2 、 Figure 3 and Figure 4 The limiting spring 224 drives the moving block 223 to move in the direction away from the moving bar 225. When the card block 222 is inserted into the card slot, the limiting spring 224 is in a compressed state. At this time, the limiting bar 221 is inserted into the limiting slot 151; when the card block 222 is not inserted into the card slot, the connecting bar 22 abuts against the slot wall of the connecting slot 161, and the limiting spring 224 is in a compressed state. At this time, the limiting bar 221 is not inserted into the limiting slot 151.

[0043] Reference Figure 2 and Figure 3 The staff first presses the limit plate 2 and slides the limit plate 2 to allow the block 222 to move in the connecting groove 161, so that the block 222 is aligned with the slot. At this time, the limit spring 224 drives the limit plate 2 to move, allowing the block 222 to be inserted into the slot, so that the block 222 limits the limit plate 2, and the limit bar 221 is located in the limit slot 151, so that the limit bar 221 limits the handle 15.

[0044] Reference Figure 1 and Figure 2 The upper shell 11 is slidably connected to a receiving plate 3, which blocks the through-opening of the receiving slot 16. A locking bar 31 is rotatably connected to the surface of the receiving plate 3. A locking groove 17 for inserting the locking bar 31 is defined on the outer surface of the upper shell 11. When the receiving plate 3 blocks the opening of the connecting slot 161, the locking bar 31 can be inserted into the locking groove 17, thereby pre-fixing the receiving plate 3 to the upper shell 11.

[0045] Reference Figure 5A fixing groove 32 is provided on the surface of the accommodating plate 3 , and the fixing groove 32 extends along the length direction of the upper shell 11 . A fixing bar 23 is slidably connected to the connecting bar 22 , and the fixing bar 23 can be inserted into the fixing groove 32 .

[0046] Reference Figure 5 The outer surface of the upper shell 11 is provided with a through-hole 18 that communicates with the connecting groove 161. An operating bar 181 is slidably connected to the through-hole 18. The operating bar 181 can be inserted into the connecting groove 161 without protruding from the outer surface of the upper shell 11. An operating slope 182 is provided on the surface of the operating bar 181 near the connecting groove 161. The distance between the operating slope 182 and the receiving plate 3 gradually increases along the direction from the through-hole 18 to the connecting groove 161, and the operating slope 182 is located in the movement path of the fixing bar 23.

[0047] Reference Figure 5 When the staff presses the operating bar 181, the operating bar 181 is inserted into the connecting groove 161. At this time, the operating bar 181 drives the fixing bar 23 to move through the operating inclined surface 182, so that the fixing bar 23 can be inserted into the fixing groove 32, thereby locking the fixing bar 23 to the accommodating plate 3. At this time, the accommodating plate 3 can block the opening in the through direction of the accommodating groove 16.

[0048] Reference Figure 3 and Figure 5 A fixed bevel 231 is provided on the surface of the fixed bar 23. The distance between the fixed bevel 231 and the movable block 223 gradually decreases along the direction from the fixed bar 23 to the limiting bar 221, and the fixed bevel 231 is located in the fixing groove 32. When the staff presses the limiting plate 2, the limiting plate 2 drives the connecting bar 22 to move, allowing the fixed bevel 231 to drive the fixing bar 23 to move through the groove wall of the fixing groove 32, so that the fixing bar 23 retracts into the limiting plate 2, so that the fixing bar 23 drives the operating bar 181 to move through the operating bevel 182, so that the operating bar 181 is separated from the connecting bar 22, so as to facilitate the movement of the connecting bar 22. If the limiting bar 221 is damaged, the staff can directly replace the limiting plate 2, the connecting bar 22 and other structures. By replacing the entire structure that is accidentally touched, other structures of the circuit breaker do not need to be replaced, thereby increasing the service life of the circuit breaker.

[0049] The implementation principle of a small circuit breaker in an embodiment of the present application is as follows: the staff first installs the limit plate 2 in the accommodating groove 16, then slides the accommodating plate 3 to allow the accommodating plate 3 to block the opening in the through direction of the accommodating groove 16, and finally the staff slides the operating bar 181 to allow the operating bar 181 to drive the fixing bar 23 to move through the operating inclined surface 182, and the fixing bar 23 is inserted into the fixing groove 32, so that the fixing bar 23 can limit the movement of the accommodating plate 3.

[0050] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprises" cover the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0051] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present application should be included in the scope of protection of the present application.

Claims

1. A miniature circuit breaker, comprising a housing (1), wherein a handle (15) is rotatably connected to the housing (1), characterized in that: The housing (1) is slidably connected to a limit plate (2), the limit plate (2) is provided with a limit strip (221), and the handle (15) is provided with a limit slot (151) for the limit strip (221) to be inserted; when the handle (15) is in a circuit-off state, the limit strip (221) can be inserted into the limit slot (151); when the handle (15) is in a circuit-on state, the limit strip (221) cannot be inserted into the limit slot (151); The limiting plate (2) is provided with a card block (222), and the housing (1) is provided with a card slot for inserting the card block (222); when the limiting strip (221) is inserted into the limiting slot (151), the limiting plate (2) is slid, and the card block (222) can be inserted into the card slot; The housing (1) is provided with a receiving groove (16) for the limiting plate (2) to slide, the housing (1) is slidably connected to a receiving plate (3), the receiving plate (3) is provided with a fixing groove (32), and the limiting plate (2) is slidably connected to a fixing bar (23) for inserting into the fixing groove (32); when the fixing bar (23) is inserted into the fixing groove (32), the receiving plate (3) blocks the receiving groove (16); when the limiting bar (221) is inserted into the limiting groove (151), the fixing bar (23) is separated from the fixing groove (32); The housing (1) is provided with a through hole (18) communicating with the accommodating groove (16); an operating strip (181) is slidably connected in the through hole (18); an operating inclined surface (182) is provided on the operating strip (181); a distance between the operating inclined surface (182) and the accommodating plate (3) gradually increases along the direction from the through hole (18) to the accommodating groove (16); the operating inclined surface (182) is located on the moving path of the fixing strip (23); when the operating strip (181) is located in the through hole (18), the fixing strip (23) is inserted into the fixing groove (32); The housing (1) comprises an upper shell (11) and a lower shell (12); a mounting plate (13) is provided on the lower shell (12); a mounting strip (131) is slidably connected to the mounting plate (13); a placement groove (14) is provided on the upper shell (11) for inserting the mounting plate (13); a mounting groove (141) is provided on the groove wall of the placement groove (14) for inserting the mounting strip (131); when the mounting strip (131) is inserted into the mounting groove (141), the upper shell (11) is fixed to the lower shell (12); The mounting bar (131) is located on the sliding path of the limiting plate (2), and when the limiting bar (221) is inserted into the limiting groove (151), the mounting bar (131) is inserted into the mounting groove (141).

2. A miniature circuit breaker according to claim 1, characterized in that: The housing (1) is provided with a limit spring (224), the limit spring (224) is provided with a moving block (223), the moving block (223) is slidably connected to the limit plate (2), and the limit spring (224) drives the card block (222) to be inserted into the card slot.

3. A miniature circuit breaker according to claim 1, characterized in that: The limiting plate (2) is provided with a spring piece (21), and the spring piece (21) can be inserted into the placement groove (14); when the installation bar (131) is inserted into the installation groove (141), the spring piece (21) is located in the gap between the installation bar (131) and the wall of the placement groove (14).

4. A miniature circuit breaker according to claim 1, characterized in that: A locking strip (31) is rotatably connected to the accommodating plate (3), and a locking groove (17) for inserting the locking strip (31) is provided on the housing (1); when the locking strip (31) is inserted into the locking groove (17), the accommodating plate (3) blocks the accommodating groove (16).

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