A handle operating mechanism for plug-in circuit breakers

Abstract

The application relates to a handle action mechanism of an insertion type circuit breaker, which comprises an insertion type circuit breaker, a manual handle, a locking mechanism and a closing and opening display mechanism. The upper part of the manual handle is provided with the locking mechanism. The protruding blocks of the in-place detection member and the anti-mispulling member of the locking mechanism are extended or retracted from the cabinet by pushing and pulling the manual handle, so that the insertion type circuit breaker cannot be pushed to close when not installed in place and cannot be pulled out before being opened. A disc spring is arranged at the lower part of the protruding block, the disc spring always provides an upward lifting force for the protruding block, so that the protruding block is not easy to be out of place. The manual handle is linked with the closing and opening display mechanism through the contractile protruding block. The closing and opening display mechanism displays a closing mark after the circuit breaker is closed and displays an opening mark after the circuit breaker is opened. The handle action mechanism has the advantages that the locking mechanism and the closing and opening display mechanism of the insertion type circuit breaker require less parts, the structure is compact and simple, and the operation is stable and reliable.

Description

Technical Field

[0001] This invention relates to a low-voltage electrical appliance, and more specifically to a handle operating mechanism for a plug-in circuit breaker and a plug-in circuit breaker. Background Technology

[0002] With the rapid development of my country's power and communication technologies, especially the application of 5G network technology, increasingly higher requirements have been placed on the practicality, safety, and reliability of terminal electrical equipment such as circuit breakers. Traditional circuit breakers can no longer meet these requirements. Through continuous research and development, my country's circuit breakers have not only reached new levels in miniaturization, intelligence, and reliability, but also seen many new structural designs. For example, they can be easily plugged in and used like ordinary electrical plugs, allowing for convenient installation or removal from the circuit. They can also be locked in a stable working state at the installation position. In addition, the wiring direction of this type of circuit breaker and the wiring direction of the external conductors are in the same plane. This is the plug-in circuit breaker. This type of circuit breaker not only provides various safety protection measures for power lines, but also occupies little space and can meet various intelligent usage requirements. The locking protection mechanism and the opening / closing display mechanism of existing plug-in circuit breakers are generally set up independently, which is complex and occupies valuable internal space of the circuit breaker. Some of these mechanisms use buttons, while others use handles. The handle action protrusion of the locking protection extends outside the circuit breaker's mounting cabinet. Due to the elastic deformation of the cabinet, the handle action protrusion fails to work, resulting in poor working stability of the circuit breaker. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and to disclose a simple and stable plug-in circuit breaker handle operating mechanism and a plug-in circuit breaker.

[0004] To achieve the above objectives, the technical solution adopted by this invention is as follows:

[0005] A handle operating mechanism for a plug-in circuit breaker includes a plug-in circuit breaker, a manual handle, a locking mechanism, an opening / closing display mechanism, and a contact operating mechanism. The plug-in circuit breaker housing is configured with a left base pole and a right upper cover pole. The manual handle is located on the upper front side of the plug-in circuit breaker base pole. The locking mechanism is located on the upper part of the manual handle. The opening / closing display mechanism is located on the upper front side of the plug-in circuit breaker upper cover pole.

[0006] In a further configuration, the locking mechanism includes a positioning detection component, an anti-misoperation component, and a torsion spring. The anti-misoperation component is located close to the inner wall of one pole of the plug-in circuit breaker base and is positioned above the manual handle. The torsion spring is sleeved on the torsion spring mounting shaft of the anti-misoperation component. The positioning detection component is located close to the torsion spring, and the two legs of the torsion spring respectively press against the lower parts of the protrusions of the anti-misoperation component and the positioning detection component.

[0007] In a further configuration, the manual handle is connected to the contact actuation mechanism of the plug-in circuit breaker, and the plug-in circuit breaker is closed or opened by pushing or pulling out the manual handle.

[0008] In a further configuration, the manual handle is linked to the circuit breaker opening / closing display mechanism. When the manual handle is pushed forward to put the plug-in circuit breaker in the plugged-in position, the circuit breaker opening / closing display mechanism displays a closed indicator. When the manual handle is pulled out to put the plug-in circuit breaker in the open position, the circuit breaker opening / closing display mechanism displays an open indicator.

[0009] Further, the manual handle is rectangular with a right-angled trapezoidal locking stop in the middle, a manual handle button at one end, and a connecting rod hole at the other end. A wedge-shaped protrusion of the manual handle is provided on one side of the bottom of the locking stop.

[0010] Furthermore, the locking stops of the manual handle are respectively provided with a right-angled locking stop surface, a top locking stop surface, and a beveled locking stop surface.

[0011] Further configured, the positioning detection component is composed of three parts: a positioning detection component protrusion on the right side, a positioning detection component top surface and a positioning detection component inner surface, the positioning detection component top surface and the positioning detection component inner surface being mutually perpendicular rectangular planes; a mounting hole in the middle of the positioning detection component, which is mounted on the circuit breaker housing via a mounting shaft on the base; the positioning detection component can rotate around the mounting shaft; and the left side of the positioning detection component is configured as an upward-curved pressing end.

[0012] Further, the anti-misoperation component is configured as three parts: a protruding anti-misoperation component block on the right side, the protruding anti-misoperation component block having a top surface and an inner surface, the top surface and the inner surface being rectangular planes perpendicular to each other; a torsion spring mounting shaft on one side of the middle of the anti-misoperation component for mounting a torsion spring, the torsion spring mounting shaft having a mounting hole, the anti-misoperation component being mounted on the circuit breaker housing via the mounting shaft on the base, the anti-misoperation component being rotatable around the mounting shaft; and a downward-curving pressing part on the left side of the anti-misoperation component, the lower side of which has an anti-misoperation pressing surface.

[0013] Further, the torsion spring is configured as three parts: one part is a torsion spring pressing part, which abuts against the base side wall of the plug-in circuit breaker during installation; the middle part is a mounting part, which is sleeved on the torsion spring mounting shaft of the anti-misoperation component during installation; and the other part is a pressure foot at both ends, which presses against the lower part of the anti-misoperation component and the position detection component protrusion block respectively, providing an upward elastic force for the anti-misoperation component and the position detection component protrusion block.

[0014] In a further configuration, when the plug-in circuit breaker is not installed in the cabinet or is installed in the cabinet but not in position, the right-angled surface of the manual handle locking stop will be blocked by the pressing end of the positioning detection element, preventing the manual handle from being pushed forward and thus preventing the plug-in circuit breaker from being inserted. Only when the plug-in circuit breaker is installed in position, the top surface of the positioning detection element enters the cabinet, the upward-curving pressing end is pushed up by the top surface of the manual handle locking stop, and the protrusion of the positioning detection element retracts into the cabinet, can the manual handle be pushed forward to allow the plug-in circuit breaker to be inserted into the cabinet.

[0015] Furthermore, when the plug-in circuit breaker is in normal closed operation, the inner side of the protruding block of the anti-misoperation component is stuck by the cabinet housing, preventing the other parts of the plug-in circuit breaker from being pulled out. Only when the manual handle button is pulled, causing the inclined side of the manual handle to lift the top surface of the anti-misoperation component and retract the protruding block of the anti-misoperation component into the cabinet, and the plug-in circuit breaker is in the open state, can the plug-in circuit breaker be pulled out.

[0016] Further, the circuit breaker opening and closing display mechanism includes a display window located on the upper part of the outer casing of the circuit breaker opening and closing display mechanism, a circuit breaker opening and closing display located on the upper part of the wedge-shaped protrusion of the manual handle, and a compression spring located inside the circuit breaker opening and closing display.

[0017] Further configuration: the circuit breaker opening / closing indicator is L-shaped, with a display surface on the left side indicating the opening / closing status of the plug-in circuit breaker. The front and rear sides of the display surface are designated as guide edges. A spring mounting platform is provided on the central platform of the circuit breaker opening / closing indicator, and a compression spring is provided on the spring mounting platform to provide working pressure for the circuit breaker opening / closing indicator. Guide bosses are provided on the front and rear sides of the central platform of the circuit breaker opening / closing indicator. Below the central platform of the circuit breaker opening / closing indicator, a sliding inclined surface for the circuit breaker opening / closing indicator is provided, which engages with the wedge-shaped protrusion of the manual handle.

[0018] Furthermore, the inner two walls of the housing of the opening and closing display mechanism are provided with guide edge guide grooves and guide boss guide grooves for the opening and closing display.

[0019] In a further configuration, the plug-in circuit breaker includes a handle actuation mechanism as described in any of the plug-in circuit breakers above.

[0020] The advantages of the handle operating mechanism of the plug-in circuit breaker described above are:

[0021] This invention utilizes a manual handle to control the locking mechanism and the open / close display mechanism of a plug-in circuit breaker. The pushing and pulling of the manual handle controls the positioning detection element and the anti-misoperation element of the locking mechanism, ensuring that the plug-in circuit breaker cannot be inserted and closed if not properly installed, and cannot be pulled out if not opened. A disc spring located under the protrusion of the positioning detection element and the anti-misoperation element provides a constant upward force to the protrusion, preventing it from easily becoming displaced. Simultaneously, the manual handle is linked to the open / close display mechanism via the wedge-shaped protrusion. When the plug-in circuit breaker is closed, a closed indicator is displayed; when it is open, an open indicator is displayed. This handle actuation mechanism reduces the number of components required for the locking mechanism and the open / close display mechanism of the plug-in circuit breaker, resulting in a compact, simple structure and stable, reliable operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the installation position of the handle action mechanism of the present invention.

[0023] Figure 2 A schematic diagram of the locking mechanism for when a plug-in circuit breaker is not fully installed in the cabinet.

[0024] Figure 3 A schematic diagram of the locking mechanism for inserting a plug-in circuit breaker into the cabinet.

[0025] Figure 4 This is a schematic diagram of the locking mechanism when the plug-in circuit breaker is in the pulled-out position.

[0026] Figure 5 This is a schematic diagram of the torsion spring combination structure of the locking mechanism.

[0027] Figure 6 Diagram of the opening and closing display mechanism.

[0028] Figure 7 Structural diagram of the switch opening and closing indicator.

[0029] Figure 8 This is a structural diagram of a manual handle.

[0030] Figure 9 Structural diagram of the component to be inspected.

[0031] Figure 10 Structural diagram to prevent accidental removal of components.

[0032] Figure 11 This is a structural diagram of the torsion spring locking mechanism. Detailed Implementation

[0033] First, it should be noted that the terms "upper," "lower," "left," "right," "middle," "inner," and "side" used in the specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or part referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0034] Below, in conjunction with Figures 1 to 11 The present invention will be further illustrated through specific embodiments.

[0035] A handle actuation mechanism for a plug-in circuit breaker, such as Figures 1-5 As shown, the circuit breaker includes a plug-in type circuit breaker, a manual handle, a locking mechanism, an opening / closing display mechanism, and a contact actuation mechanism. The casing of the plug-in type circuit breaker is configured as a two-pole circuit breaker, with a base pole 201 on the left and an upper cover pole 202 on the right. The manual handle 1 is located on the upper front side of the base pole 201 of the plug-in type circuit breaker. The locking mechanism is located on the upper part of the manual handle 1. The opening / closing display mechanism 601 is located on the upper front side of the upper cover pole 202 of the plug-in type circuit breaker.

[0036] Further, the locking mechanism includes a positioning detection element 3, an anti-misoperation element 4, and a torsion spring 5. The anti-misoperation element 4 is closely attached to the inner wall of the first pole 201 of the plug-in circuit breaker base and the upper part of the manual handle 1. The torsion spring 5 is sleeved on the torsion spring mounting shaft 401 of the anti-misoperation element 4. The positioning detection element 3 is closely attached to the torsion spring 5. One leg 501 of the torsion spring 5 presses against the lower part of the protrusion of the anti-misoperation element 4, and the other leg 502 of the torsion spring 5 presses against the lower part of the protrusion of the positioning detection element 3.

[0037] In a further configuration, the manual handle 1 is connected to the contact actuation mechanism of the plug-in circuit breaker, and the plug-in circuit breaker is closed or opened by pushing or pulling out the manual handle 1.

[0038] The manual handle 1 is linked to the circuit breaker opening / closing display mechanism 601. When the manual handle 1 is pushed forward to put the plug-in circuit breaker in the plug-in closed position, the circuit breaker opening / closing display mechanism 601 displays a closed indicator. When the manual handle 1 is pulled out to put the plug-in circuit breaker in the open position, the circuit breaker opening / closing display mechanism 601 displays an open indicator.

[0039] Further settings, such as Figure 8As shown, the manual handle 1 is rectangular with a right-angled trapezoidal locking stop in the middle. One end is equipped with a manual handle button 101, and the other end is equipped with a connecting rod hole 105. An actuating connecting rod connected to the circuit breaker contact actuating mechanism is provided in the connecting rod hole 105. The plug-in circuit breaker is closed or opened by pushing or pulling the manual handle 1. A manual handle wedge-shaped protrusion 106 is provided on one side of the bottom of the locking stop.

[0040] Furthermore, the manual handle 1 is provided with a right-angled surface 104, a top surface 103, and a beveled surface 102 for the locking position.

[0041] Further settings, such as Figure 9 As shown, the positioning detection element 3 is configured in three parts. The right part is provided with a positioning detection element protrusion, which is provided with a positioning detection element top surface 302 and a positioning detection element inner surface 301. The positioning detection element top surface 302 and the positioning detection element inner surface 301 are rectangular planes that are perpendicular to each other. The middle part of the positioning detection element 3 is provided with a mounting shaft hole 303, which is mounted on the housing 201 of the plug-in circuit breaker through the mounting shaft 2011 on the base. The left part of the positioning detection element 3 is provided with an upward-curved pressing part 304, and the end of the pressing part 304 is provided with a positioning detection element pressing end 305.

[0042] Further settings, such as Figure 10 As shown, the anti-misoperation component 4 is configured in three parts. The right part is provided with an anti-misoperation component protrusion. The anti-misoperation component protrusion is provided with an anti-misoperation component top surface 402 and an anti-misoperation component inner surface 401. The anti-misoperation component top surface 402 and the anti-misoperation component inner surface 401 are set as mutually perpendicular rectangular planes. The middle part of the anti-misoperation component 4 is provided with a torsion spring mounting shaft 403 for mounting the torsion spring 5. The torsion spring mounting shaft 403 is provided with a mounting hole. The anti-misoperation component 4 is mounted on the circuit breaker housing 201 through the mounting shaft 2011 on the base. The left part of the anti-misoperation component 4 is set as a downward-curving top pressing part. The bottom side of the top pressing part is provided with an anti-misoperation component top pressing surface 404.

[0043] Further settings, such as Figure 11As shown, the torsion spring 5 is configured in three parts: a torsion spring pressing part 503, which abuts against the base side wall 201 of the inserted circuit breaker during installation; a mounting part 504, which is sleeved on the torsion spring mounting shaft 404 of the anti-misoperation component 4 during installation; and two pressure feet 501 and 502 at both ends. The pressure foot 501 presses against the lower part of the protrusion of the anti-misoperation component 4, and the pressure foot 502 presses against the lower part of the protrusion of the positioning detection component 3, providing a reset torque for the protrusions of the anti-misoperation component 4 and the positioning detection component 3, so that the protrusions of the anti-misoperation component 4 and the positioning detection component 3 always receive an upward elastic force, making it difficult for the protrusions of the anti-misoperation component 4 and the positioning detection component 3 to become displaced.

[0044] Further settings, such as Figure 2 , Figure 3 As shown, when the plug-in circuit breaker is not installed in the cabinet or is installed in the cabinet but not in the correct position, the right-angled surface 104 of the manual handle locking stop will be blocked by the pressing end 305 of the positioning detection element, preventing the manual handle 1 from being pushed forward and thus preventing the plug-in circuit breaker from closing. Only when the plug-in circuit breaker is installed in place, the top surface 302 of the positioning detection element enters the cabinet, the upward-curving pressing end 305 is pushed up by the top surface 103 of the manual handle locking stop, and the protrusion of the positioning detection element retracts into the cabinet, can the manual handle 1 be pushed forward to allow the plug-in circuit breaker to close. This ensures that the plug-in circuit breaker can only close after it is correctly installed in place.

[0045] Further settings, such as Figure 3 , Figure 4 As shown, when the circuit breaker is in normal operation with the circuit breaker closed, the inner side 401 of the anti-misoperation component 4 is blocked by the cabinet housing 2012, preventing the other parts of the plug-in circuit breaker from being pulled out. Only by pulling the manual handle button 101 to make the manual handle locking oblique edge 102 push up the downward-curving top surface 404 of the anti-misoperation component, the anti-misoperation component protrusion retracts into the cabinet, and the plug-in circuit breaker can be pulled out when it is in the open state. This ensures that the plug-in circuit breaker can be safely pulled out when it is in the open state.

[0046] Further settings, such as Figure 6 , Figure 7 As shown, the opening and closing display mechanism 601 includes a display window 203 disposed on the upper part of the opening and closing display mechanism setting pole housing 202, an opening and closing display 601 disposed on the upper part of the manual handle wedge-shaped protrusion 106, and a compression spring 6011 disposed inside the opening and closing display 601.

[0047] Further configuration: the circuit breaker opening / closing indicator 601 is L-shaped. A display surface 6016 indicating the opening / closing status of the plug-in circuit breaker is provided on the left side of the indicator. A guide edge 6014 is provided on the front side of the display surface 6016, and a guide edge 6015 is provided on the rear side of the display surface 6016. A spring mounting platform 6018 is provided on the middle platform of the circuit breaker opening / closing indicator. A guide boss 6012 is provided on the front side of the middle platform of the circuit breaker opening / closing indicator 601, and a guide boss 6016 is provided on the rear side of the middle platform of the circuit breaker opening / closing indicator. Below the middle platform of the circuit breaker opening / closing indicator 601, a sliding inclined surface 6017 is provided that engages with the wedge-shaped protrusion 106 of the manual handle.

[0048] Furthermore, guide grooves for the guide edges 6014 and 6015 and guide bosses 6012 and 6014 of the circuit breaker display are provided on the inner two walls of the housing 202 of the circuit breaker display mounting pole, so that the circuit breaker display can smoothly rise or fall through the inclined surface of the wedge-shaped protrusion 106 of the manual handle.

[0049] It should be noted that the above embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious variations or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A handle operating mechanism for a plug-in circuit breaker, comprising a plug-in circuit breaker, a manual handle, a locking mechanism, an opening / closing display mechanism, and a contact operating mechanism, wherein the plug-in circuit breaker housing is configured with one pole on the left base and one pole on the right upper cover; the manual handle is located on the upper front side of the pole on the plug-in circuit breaker base; the locking mechanism is located on the upper part of the manual handle; and the opening / closing display mechanism is located on the upper front side of the pole on the plug-in circuit breaker upper cover; characterized in that: The locking mechanism includes a positioning detection element, an anti-misoperation element, and a torsion spring. The anti-misoperation element is mounted on the inner wall of one pole of the plug-in circuit breaker base, above the manual handle. The torsion spring is sleeved on the torsion spring mounting shaft of the anti-misoperation element. The positioning detection element is positioned close to the torsion spring, with its two legs pressing against the lower parts of the anti-misoperation element and the positioning detection element protrusion. The positioning detection element is configured in three parts: a positioning detection element protrusion on the right side, which has a top surface and an inner surface, both of which are perpendicular rectangular planes; a mounting hole in the middle, which allows it to be mounted on the plug-in circuit breaker housing via a mounting shaft on the base; and an upward-curving pressing end on the left side. The anti-misoperation component is configured in three parts: a protruding anti-misoperation component block on the right side, the protruding anti-misoperation component block having a top surface and an inner surface, the top surface and the inner surface being rectangular planes perpendicular to each other; a torsion spring mounting shaft on one side of the middle of the anti-misoperation component for mounting a torsion spring, the torsion spring mounting shaft having a mounting hole, the anti-misoperation component being mounted on the housing of the plug-in circuit breaker via the mounting shaft on the base, the anti-misoperation component being rotatable around the mounting shaft; and a downward-curving pressing part on the left side of the anti-misoperation component, the lower side of which has an anti-misoperation pressing surface. The torsion spring is configured in three parts: a torsion spring pressing part that abuts against the base sidewall of the plug-in circuit breaker during installation; a middle mounting part that is sleeved on the torsion spring mounting shaft of the anti-misoperation component during installation; and two pressure feet that press against the lower parts of the anti-misoperation component and the positioning detection component protrusions, respectively, providing upward elastic force to the anti-misoperation component and the positioning detection component protrusions. The manual handle is connected to the contact actuation mechanism of the plug-in circuit breaker, and the plug-in circuit breaker is closed or opened by pushing or pulling the manual handle. The manual handle is linked to the opening / closing display mechanism. When the manual handle is pushed forward to put the plug-in circuit breaker in the plug-in closed position, the opening / closing display mechanism displays a closed indicator; when the manual handle is pulled out to put the plug-in circuit breaker in the open position, the opening / closing display mechanism displays an open indicator.

2. The handle actuation mechanism of the plug-in circuit breaker according to claim 1, characterized in that: The manual handle is rectangular with a right-angled trapezoidal locking stop in the middle. One end has a manual handle button, and the other end has a connecting rod hole. A wedge-shaped protrusion of the manual handle is provided on one side of the bottom of the locking stop.

3. The handle actuation mechanism of the plug-in circuit breaker according to claim 2, characterized in that: The manual handle has a locking stop with a right-angled surface, a top surface, and a beveled surface.

4. The handle actuation mechanism of the plug-in circuit breaker according to claim 1, characterized in that: When the plug-in circuit breaker is not installed in the cabinet or is installed in the cabinet but not in place, the right-angled surface of the manual handle locking stop will be blocked by the pressing end of the positioning detection element, preventing the manual handle from being pushed forward and thus preventing the plug-in circuit breaker from being inserted. Only when the plug-in circuit breaker is installed in place, the top surface of the positioning detection element enters the cabinet, the upward-curving pressing end is pushed up by the top surface of the manual handle locking stop, and the protrusion of the positioning detection element retracts into the cabinet, can the manual handle be pushed forward to close the plug-in circuit breaker.

5. The handle actuation mechanism of the plug-in circuit breaker according to claim 1, characterized in that: When the plug-in circuit breaker is in normal closed operation, the inner side of the protruding block of the anti-misoperation component is stuck by the cabinet housing, preventing the other parts of the plug-in circuit breaker from being pulled out. Only when the manual handle button is pulled, causing the inclined side of the manual handle to lift the top surface of the anti-misoperation component, the protruding block of the anti-misoperation component retracts into the cabinet, and the plug-in circuit breaker is in the open state, can the plug-in circuit breaker be pulled out.

6. The handle actuation mechanism of the plug-in circuit breaker according to claim 1, characterized in that: The circuit breaker opening and closing display mechanism includes a display window located on the upper part of the outer casing of the circuit breaker opening and closing display mechanism, a circuit breaker opening and closing display located on the wedge-shaped protrusion of the manual handle, and a compression spring located inside the circuit breaker opening and closing display.

7. The handle actuation mechanism of the plug-in circuit breaker according to claim 6, characterized in that: The circuit breaker opening and closing indicator is L-shaped. A display surface indicating the opening and closing status of the plug-in circuit breaker is provided on the left side of the circuit breaker opening and closing indicator. The front and rear sides of the display surface are set as guide edges. A spring mounting platform is provided on the middle platform of the circuit breaker opening and closing indicator. Guide protrusions are provided on the front and rear sides of the middle platform of the circuit breaker opening and closing indicator. Under the middle platform of the circuit breaker opening and closing indicator, a sliding inclined surface of the circuit breaker opening and closing indicator is provided, which engages with the wedge-shaped protrusion of the manual handle.

8. The handle actuation mechanism of the plug-in circuit breaker according to claim 6, characterized in that: in The inner walls of the outer casing of the circuit breaker opening and closing display mechanism are provided with guide edge guide grooves and guide boss guide grooves for the circuit breaker opening and closing display.

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