CN116741588A - plug-in circuit breaker - Google Patents

Abstract

A plug-in circuit breaker includes a circuit breaker housing, an operating part for driving the circuit breaker to open and close, and a locking mechanism. The locking mechanism includes a locking protrusion that can extend out of the circuit breaker housing and retract into the circuit breaker housing. It also includes a pull-out mechanism and a first elastic member. The pull-out mechanism includes a pull-out part for applying pull-out force. The circuit breaker housing is provided with a first assembly hole to accommodate the pull-out mechanism. The pull-out mechanism When the mechanism moves to the first position, the first elastic member stores energy and is limited in the first assembly hole. When the limit on the pulling mechanism is released, the first elastic member drives the pulling mechanism to move to the second position. The drawing part extends out of the first assembly hole, and when there is no need to operate the drawing mechanism, the drawing mechanism can be pressed into the first assembly hole to limit the position, so that the user cannot operate the drawing part, thereby improving the safety of electricity use.

Description

plug-in circuit breaker

Technical field

The invention relates to the field of low-voltage electrical appliances, and in particular to a plug-in circuit breaker.

Background technique

With the development of communication technology, communication cabinets have further put forward requirements for the height direction and circuit breaker installation method, and the equipment power distribution space has been further compressed. 1U size-height circuit breakers and plug-in installation methods follow the trend, but most of the existing 1U Plug-in circuit breakers of a certain size are difficult to remove and operate after being installed in the cabinet. This type of plug-in circuit breaker is inserted side by side into the cabinet. Since the height and width of the operating surface of the circuit breaker exposed by the cabinet are about 4cm and 2cm respectively (of course it can be thicker or thinner, depending on the product), it is inconvenient. Pull it out, and when pulling it out, you need to unlock the locking mechanism of the circuit breaker and cooperate with the locking of the cabinet.

Existing plug-in circuit breakers that use handles as opening and closing operating parts are also equipped with a separate pull-out mechanism to facilitate the application of pull-out force or connection with an external pull-out device. The pull-out mechanism is usually exposed and can easily cause errors. Operation, incorrectly applying pulling force when pulling cannot be performed.

Moreover, this type of plug-in circuit breaker also needs to consider the unlocking mechanism, which is costly and complex in structure.

In addition, a separate pulling mechanism cannot guarantee the opening and closing state of the circuit breaker at this time. If the pulling operation is performed in the closed state, there will be electrical safety issues.

Contents of the invention

The purpose of the invention is to overcome at least one defect of the prior art and provide a plug-in circuit breaker.

In order to achieve the above objects, the present invention adopts the following technical solutions:

A plug-in circuit breaker includes a circuit breaker housing, an operating part for driving the circuit breaker to open and close, and a locking mechanism. The locking mechanism includes a locking protrusion that can extend out of the circuit breaker housing and retract into the circuit breaker housing. It also includes a pull-out mechanism and a first elastic member. The pull-out mechanism includes a pull-out part for applying pull-out force. The circuit breaker housing is provided with a first assembly hole to accommodate the pull-out mechanism. The pull-out mechanism When the mechanism moves to the first position, the first elastic member stores energy and is limited in the first assembly hole so that the user cannot operate the drawing part. When the limit on the drawing mechanism is released, the first elastic member drives the drawing The mechanism moves to the second position so that the drawing part extends out of the first assembly hole.

Preferably, the pulling mechanism includes an unlocking part, and the pulling mechanism can drive the locking protrusion of the locking mechanism to retract into the circuit breaker housing through the unlocking part.

Preferably, when the first elastic member drives the pulling mechanism to move to the second position, the pulling mechanism drives the locking protrusion of the locking mechanism through the unlocking part to retract into the circuit breaker housing; or, after the pulling mechanism moves to the second position, Applying a pulling force drives the pulling mechanism to continue to move to the third position, and the unlocking portion drives the locking protrusion of the locking mechanism to retract into the circuit breaker housing.

Preferably, when the operating part moves to the closing position, it directly or indirectly limits the locking mechanism so that the locking protrusion cannot retract into the circuit breaker housing; when the operating part moves to the opening position, the locking mechanism limit is released. .

Preferably, the locking mechanism includes a locking piece provided with a locking protrusion, the second elastic member drives the locking piece to move so that the locking protrusion extends out of the circuit breaker housing, and the pulling mechanism directly or indirectly drives the locking piece through the unlocking part, so that The locking tab retracts into the circuit breaker housing.

Preferably, the locking mechanism further includes a linkage piece, and the pulling mechanism drives the locking mechanism through the linkage piece, so that the locking protrusion retracts into the circuit breaker housing.

Preferably, the linkage piece is rotatably arranged in the circuit breaker housing, and is provided with a first linkage part for cooperating with the locking part, a second linkage part for cooperating with the pulling mechanism, and a third linkage part for cooperating with the operating part. Linkage part; the operating part is a handle mechanism, and the handle mechanism is provided with a handle limiter. When the handle mechanism rotates to the closing position, the handle limiter corresponds to the third linkage part of the linkage, so that the linkage It is impossible to rotate in the direction in which the locking protrusion of the driving locking piece is retracted into the circuit breaker housing. When the handle mechanism rotates to the opening position, the handle limit part is misaligned with the third linkage part of the linkage piece.

Preferably, the handle mechanism is provided with an opening locking part. When the handle mechanism is rotated to the opening position, the opening locking part corresponds to the third linkage part of the linkage part; the locking part is forced to shrink the locking protrusion. When returning to the circuit breaker housing, the driving linkage rotates through the third linkage part to limit the opening locking part, so that the handle mechanism cannot rotate to the closing position, and/or the pull-out mechanism moves from the first position to the third position. In the second position or the third position, the second linkage part drives the linkage part to rotate, and the linkage part limits the opening lock part through the third linkage part, so that the handle mechanism cannot rotate to the closing position, and at the same time, the linkage part passes through the first The linkage part drives the locking piece to move, causing the locking protrusion to retract into the circuit breaker housing.

Preferably, when the handle mechanism is in the opening position and the pull-out mechanism moves to the first position, the second elastic member drives the locking member to move so that the locking protrusion extends out of the circuit breaker housing, and the locking member is driven and linked through the first linkage part. The component rotates to cause the third linkage part to release the limit on the opening locking part.

Preferably, the pull-out mechanism includes a pull-out piece provided with a pull-out part, the pull-out piece is slidably and rotationally installed in the first assembly hole, and the pull-out piece can be connected to the circuit breaker by pressing and/or rotating. Limiting the housing or releasing the limiting position between the pulling piece and the circuit breaker housing, so that the pulling piece moves between the first position and the second position.

Preferably, the pull-out part includes a pull-out part, a sliding part, a limiting part and an unlocking part, the sliding part is used for slidingly fitting with the first assembly hole and can rotate in the first assembly hole, and the unlocking part Used to drive the locking mechanism to unlock.

Preferably, a first limiting portion is provided in the circuit breaker housing. Pressing the pulling member causes the pulling member to compress the first elastic member and retract into the first assembly hole, and rotating the pulling member causes the limiting portion to contact the first limiting portion. At this time, the pulling mechanism is in the first position, the pulling part retracts into the first assembly hole, and when the pulling part is rotated to dislocate the limiting part and the first limiting part, the first elastic member drives the pulling part The pulling piece slides along the first assembly hole, so that the pulling part extends out of the first assembly hole.

Preferably, the limiting portion includes at least one limiting protrusion protruding radially from the sliding portion.

Preferably, the limiting part and the unlocking part are an integral structure, and the limiting part is also used to drive the locking mechanism to unlock, and/or the limiting part is provided with a first elastic member for cooperating with the first elastic member. The fixing part, and/or the limiting part and the first assembly hole are located at one end of the circuit breaker housing to limit the pulling member from coming out of the first assembly hole.

Preferably, the limiting part and the drawing part are respectively provided at both ends of the sliding part, the sliding part is cylindrical, the drawing part is a circular plate, the diameter of the circular plate is larger than the diameter of the sliding part, so The limiting part is a long limiting block, the length of the limiting part is greater than the diameter of the sliding part, and two limiting protrusions are formed in the radial direction of the sliding part.

Preferably, the drawing part is provided with a rotating part, and the rotating part is a straight groove.

Preferably, there are indicator marks, which include a lock mark and an unlock mark arranged around the first assembly hole, and an indicator pointer provided on the pull-out piece for indicating the rotation position of the pull-out piece.

Preferably, the first assembly hole includes a sliding hole that cooperates with the sliding part and a circular sinking groove for accommodating the pulling part. When the pulling mechanism is in the first position, the pulling part is retracted to the circular sinking groove. in the trough.

Preferably, the limiting part is a limiting protrusion arranged in the radial direction of the sliding part, and a sliding groove for the sliding of the limiting protrusion is provided on the inner wall of the first assembly hole along the sliding direction. When returning to the first assembly hole, the inner wall of the first assembly hole is provided with a rotation groove for the rotation of the limit protrusion at a position corresponding to the limit protrusion. The rotation groove is connected with the sliding groove, and the first limit portion is the Turn the slot.

Preferably, the locking part is arranged to slide or rotate linearly, the linkage part is set to rotate, a pivot part is provided in the middle of the linkage part, and first driving arms extend from opposite side walls of the pivot part. and the second driving arm. The first driving arm is provided with a first linkage hole as the first linkage part. One side of the second driving arm is convexly provided with a second linkage rib as the second linkage part. The protrusion on the other side is provided with a third linkage rib as a third linkage part.

Preferably, the handle mechanism includes a handle member, a handle rotation shaft and an operating handle radially connected to the handle rotation shaft. The handle member is rotated and installed in the circuit breaker housing through the handle rotation shaft, and the operating handle extends to the circuit breaker. Outside the housing, a limit boss as a handle limit part is protruding in the radial direction of the handle rotation axis, and a gate opening locking groove as a gate opening locking part is recessed.

Preferably, the operating member is provided on the operating surface of the circuit breaker housing, and the first assembly hole is also provided on the operating surface.

Preferably, the circuit breaker housing includes an operation surface and a rear end surface that are arranged oppositely, an upper side wall and a lower side wall that are arranged oppositely, and two side walls that are arranged oppositely, and a handle swing hole is provided on the operation surface, so The rear end surface is provided with terminals, the operating surface is provided with an operating member for driving the circuit breaker to open, the upper side wall and/or the lower side wall is provided with a locking hole, and the locking protrusion is provided from The locking hole sticks out.

The plug-in circuit breaker created by the present invention is embedded with a pull-out mechanism. The pull-out mechanism is limited in the circuit breaker housing so that the pull-out part is blocked and cannot be operated. When the circuit breaker needs to be pulled out from the cabinet, , the limit on the pulling mechanism is released, and the first elastic member pushes the pulling part of the pulling mechanism out of the first assembly hole, so that the user can apply pulling force manually or with additional tools. At this time, the pulling part can be applied Pulling force to pull the plug-in circuit breaker out of the cabinet, easy to operate. When there is no need to operate the pulling mechanism, the pulling mechanism can be pressed into the first assembly hole to limit the position, so that the user cannot operate the pulling part , improve electricity safety.

In addition, when the first elastic member drives the pulling mechanism to move to the second position, the locking protrusion of the locking mechanism is automatically driven to retract into the circuit breaker housing, and the locking cooperation between the locking mechanism and the cabinet is released; or, the pulling part is applied through the pulling part. When the force is applied, the pulling mechanism is driven to move and the locking protrusion of the locking mechanism is retracted into the circuit breaker housing, and the plug-in circuit breaker is pulled out from the cabinet at the same time, which is easy to operate.

In addition, when the circuit breaker is in the open state and the pull-out mechanism 2 is unlocked in the second position, the pull-out mechanism 2 drives the linkage 6 to limit the handle mechanism 5, so that the handle mechanism 5 cannot rotate to the closing position, and only the pull-out mechanism 2 can be moved to the closed position. The closing operation can only be performed when the pulling mechanism 2 moves to the locked first position, thus avoiding the user's problem of leaving the pulling mechanism 2 in an unlocked state for a long time, making the pulling part 21 operable for a long time, and prone to misoperation.

In addition, when the handle mechanism 5 rotates to the closing position, the locking mechanism 2 is limited so that the locking protrusion 31 cannot retract into the circuit breaker housing 1, so that in the closing state, the circuit breaker cannot be installed into the cabinet or removed from the cabinet. Pull it out to improve electrical safety.

In addition, when the locking member 30 is forced to retract the locking protrusion 31 into the circuit breaker housing 1, the driving linkage 6 limits the handle mechanism 5 so that the handle mechanism 5 cannot rotate toward the closing position, causing the locking member 30 to The switch cannot be closed during the process of loading and unplugging the cabinet to improve the safety of electricity use.

Description of drawings

Figure 1 is a schematic diagram of the internal structure of an embodiment of a plug-in circuit breaker. At this time, the handle mechanism is in the closing position and the pull-out mechanism 2 is in the locked state in the first position;

Figure 2 is another structural schematic diagram of the internal part of the plug-in circuit breaker embodiment. At this time, the handle mechanism is in the opening position and the pull-out mechanism 2 is in the unlocked state in the third position;

Figure 3 is an exploded view of an embodiment of a plug-in circuit breaker;

Figure 4-5 is a schematic structural diagram of an embodiment of the drawing member of the drawing mechanism;

Figure 6 is a schematic structural diagram of an embodiment of the handle mechanism;

Figure 7 is a schematic structural diagram of an embodiment of the linkage member of the locking mechanism.

Detailed ways

The specific implementation of the plug-in circuit breaker created by the present invention will be further described below with reference to the embodiments given in the accompanying drawings. The plug-in circuit breaker created by the present invention is not limited to the description of the following embodiments.

As shown in Figure 1-3, a plug-in circuit breaker includes a circuit breaker housing 1 and an operating mechanism, a moving contact, a static contact, a protection mechanism, a locking mechanism 3 and other components arranged in the circuit breaker housing 1 . The circuit breaker housing 1 has a rectangular hexahedral structure, including an operating surface and a rear end surface that are arranged oppositely, an upper side wall and a lower side wall that are arranged oppositely, and two side walls that are arranged oppositely. The side wall and the lower side wall are connected between the operating surface and the rear end surface. The operating surface is provided with an operating piece for driving the circuit breaker to open. The operating piece can be a handle mechanism 5 or a button mechanism. The operating piece is connected to the operating mechanism. The movable contact is connected to the operating mechanism. The operating piece passes through the operating mechanism. The circuit breaker is driven to open and close, and the rear end surface is provided with terminal blocks for plugging and mating with the busbar in the cabinet. An indication window can also be set on the operation surface to indicate the opening and closing status of the circuit breaker. Terminals may or may not be provided on the surface. The plug-in circuit breaker is inserted into the cabinet, and basically only the operating surface is exposed outside the cabinet; the upper and/or lower side walls are provided with locking holes 103, and the locking mechanism 3 includes a locking protrusion 31 that can extend out of the circuit breaker housing 1 and retract into the circuit breaker housing 1. The locking protrusion 31 protrudes from the locking hole 103 and is used to cooperate with the cabinet limit to disconnect the plug-in circuit breaker. The circuit breaker is limited and locked in the cabinet. At this time, the locking mechanism 3 is in the locked state. When the locking protrusion 31 retracts into the circuit breaker housing 1 from the locking hole 103, the plug-in circuit breaker can be pulled out from the cabinet. At this time, It is the unlocked state of the locking mechanism. Usually, the direction of the operating surface towards the rear end face is the length direction of the circuit breaker, the direction of the upper side wall to the lower side wall is the height direction of the circuit breaker, and the direction between the two side walls is the width direction of the circuit breaker. This is the current There is technology, so I won’t go into details.

An improvement point created by the present invention is that a pulling mechanism 2 and a first elastic member 7 are also provided in the circuit breaker housing 1. The pulling mechanism 2 includes a pulling part 21 for applying a pulling force. In order to pull out the circuit breaker from the cabinet, the circuit breaker housing 1 is provided with a first assembly hole 8 for accommodating the pulling mechanism 2. When the pulling mechanism 2 moves to the first position, the first elastic member 7 is stored. can and is limited in the first assembly hole 8. When the limitation on the pulling mechanism 2 is released, the first elastic member 7 drives the pulling mechanism 2 to move to the second position, so that the pulling part 21 extends out of the first position. Outside the assembly hole 8, pull out the plug-in circuit breaker from the cabinet by applying pulling force.

The plug-in circuit breaker of this embodiment is embedded with a pull-out mechanism 2. The pull-out mechanism 2 is limited in the circuit breaker housing 1 so that the pull-out part 21 is blocked and cannot be operated. When it is necessary to break the circuit When the device is pulled out from the cabinet, the limit on the pulling mechanism 2 is released, and the first elastic member 7 pushes the pulling part 21 of the pulling mechanism 2 out of the first assembly hole 8 so that the user can apply pulling force manually or with additional tools. Pulling force, at this time, the pulling force can be applied through the pulling part 21 to pull the plug-in circuit breaker out of the cabinet. It is easy to operate. When there is no need to operate the pulling mechanism 2, the pulling mechanism 2 can be pressed into the third There is a limit in the assembly hole 8 so that the user cannot operate the pulling part 21, thereby improving the safety of electricity use.

The operating part of this embodiment is a handle mechanism 5. The handle mechanism 5 is rotatably installed in the circuit breaker housing 1. The operating end of the handle mechanism 5 extends from the operating surface to the outside of the circuit breaker housing 1 for driving the circuit breaker to open and close. The circuit breaker housing 1 is provided with a locking hole 103 on the upper side wall, and the locking protrusion 31 of the locking mechanism 3 extends from the locking hole 103. The locking mechanism 3 includes a locking piece 30 provided with the locking protrusion 31. , the locking member 30 is slidably or rotationally installed in the circuit breaker housing 1, and the second elastic member 34 drives the locking member 30 to move so that the locking protrusion 31 extends out of the circuit breaker housing 1, thereby limiting the plug-in circuit breaker to the cabinet. Inside. The first assembly hole 8 is also provided on the operating surface. When the pulling mechanism 2 moves to the first position, the pulling part 21 is located in the first assembly hole 8. When the pulling mechanism 2 moves to the second position, the pulling part 21 moves to the second position. The pulling portion 21 extends out of the first assembly hole 8. At this time, pulling force can be applied to pull the circuit breaker out of the cabinet. It should be noted that the pulling part 21 can be directly operated by human hands to apply a pulling force, or a corresponding connection structure, such as a hole structure, a protruding structure or a hook structure, etc., can be provided on the drawing part 21 to apply pulling force with additional tools. Pulling force.

Preferably, the pulling mechanism 2 includes an unlocking part for driving the locking mechanism 3 to unlock, and the movement of the pulling mechanism 2 can drive the locking protrusion 31 of the locking mechanism 3 to retract into the circuit breaker housing 1 through the unlocking part. One implementation method is that when the restriction on the pulling mechanism 2 is released and the first elastic member 7 drives the pulling mechanism 2 to move to the second position, the pulling mechanism 2 automatically drives the locking protrusion 31 of the locking mechanism 3 to retract. Inside the circuit breaker housing 1, the user can pull the circuit breaker out of the cabinet by applying pulling force manually or with additional tools. Another embodiment is that after the first elastic member 7 drives the pulling mechanism 2 to move to the second position, the user applies a pulling force manually or with additional tools to drive the pulling mechanism 2 to continue to move to the third position and is driven by the unlocking part. The locking protrusion 31 of the locking mechanism 3 retracts into the circuit breaker housing 1 and at the same time the plug-in circuit breaker is pulled out of the cabinet. Both methods realize the unlocking of the locking mechanism 3 through the pulling mechanism 2, which is easy to operate. It should be noted that the movement of the pulling mechanism 2 can directly or indirectly drive the locking member 30, causing the locking protrusion 31 to retract into the circuit breaker housing 1, and releasing the limited cooperation between the locking mechanism 3 and the cabinet.

As shown in Figures 1-5, the pulling mechanism 2 of this embodiment includes a pulling part 20 provided with a pulling part 21. The pulling part 20 is slidably and rotationally installed in the first assembly hole 8. By pressing and/or rotating, the pulling member 20 and the circuit breaker housing 1 can be limited or released, so that the pulling member 20 can be in the first position and the second position. move between. When the pulling member 20 moves to the first position limited in the first assembly hole 8, the first elastic member 7 stores energy, and the pulling part 21 retracts into the first assembly hole 8 and is blocked; release When the pulling part 20 is limited, the first elastic member 7 drives the pulling part 20 to move to the second position, so that the pulling part 21 extends out of the first assembly hole 8 . By further applying a pulling force, the pulling member 20 can be moved between the second position and the third position to unlock the locking mechanism 3 and pull out the circuit breaker from the cabinet. As a special embodiment, the second position and the third position may be the same position.

The pulling part 20 includes a pulling part 21, a sliding part 22, a limiting part 23 and an unlocking part. The sliding part 22 is used to slide with the first assembly hole 8 and can rotate in the first assembly hole 8. The unlocking part is used to drive the locking mechanism 3 to unlock. A first limiting part 101 is provided in the circuit breaker housing 1. In this embodiment, the first limiting part 101 is a boss structure. Pressing the puller 20 causes the puller to be pulled out. The component 20 compresses the first elastic component 7 and retracts into the first assembly hole 8, and rotates the pulling component 20 at a certain angle (a locking mark is printed on the operating surface) to make the limiting part 23 and the first limiting part 101 fit. At this time, the pulling mechanism 2 is in the first position (Fig. 1). The pulling member 20 is rotated so that the limiting part 23 is misaligned with the first limiting part 101 at a certain angle (an unlocking mark is printed on the operating surface), and the first elastic member 7. Drive the drawing member 20 to slide along the first assembly hole 8, so that the drawing part 21 extends out of the first assembly hole 8. At this time, the drawing mechanism 2 is in the second position, and the drawing member 20 moves from the first position to the second position. In the second position, or when the pulling force exerted after the pulling part 20 moves to the second position drives the pulling part 20 to continue to move to the third position, the unlocking part drives the locking mechanism 3 to unlock, causing the locking protrusion 31 to retract and break the circuit. At this time, the plug-in circuit breaker can be pulled out from the cabinet through the pull-out part 21.

Preferably, the limiting part 23 and the unlocking part of the pulling piece 20 in this embodiment are an integral structure, and the limiting part 23 also serves as the unlocking part for driving the locking mechanism 3 to unlock, thereby simplifying the structure. Obviously, the pulling piece 20 can be provided with an independent unlocking portion.

Preferably, the locking mechanism 3 of this embodiment also includes a linkage 6. The pulling mechanism 2 indirectly drives the locking member 30 through the linkage 6, so that the locking protrusion 31 retracts into the circuit breaker housing 1 and unlocks the locking mechanism 3. . The locking piece 30 is rotatably or slidably installed in the circuit breaker housing 1. The locking piece 30 is provided with a locking protrusion 31. The second elastic member 34 drives the locking piece 30 to move so that the locking protrusion 31 extends out of the circuit breaker. Outside the shell 1. The linkage part 6 is rotatably installed in the circuit breaker housing 1 and is provided with a first linkage part 63 for cooperating with the locking part 30 and a second linkage part 61 for cooperating with the pulling mechanism 2. The second linkage part 61 is used for cooperating with the pulling mechanism 2. The portion 61 extends to the moving path of the unlocking portion when the pulling member 20 moves from the first position to the second position, or from the second position to the third position. When the first elastic member 7 drives the drawing member 20 to move to the second position, or when the pulling force drives the drawing member 20 to move from the second position to the third position, the limiting portion 23 as the unlocking portion passes through the second linkage portion. 61 drives the linkage part 6 to rotate, and the first linkage part 63 drives the locking part 30 to move, so that the locking protrusion 31 retracts into the circuit breaker housing 1. At this time, a pulling force can be applied through the pulling part 21 to pull the plug-in circuit breaker. Pull it out of the cabinet.

Preferably, in order to improve the safety of electricity use, when the operating part moves to the closing position, the locking mechanism 3 is directly or indirectly limited so that the locking protrusion 31 cannot retract into the circuit breaker housing 1; the operating part moves to the opening position. When the gate position is reached, release the limit of locking mechanism 3. It should be noted that the operating member may be a handle mechanism 5 or a button mechanism.

The operating component of this embodiment takes the handle mechanism 5 as an example. The handle mechanism 5 limits the locking component 30 through the linkage component 6 . The linkage part 6 is also provided with a third linkage part 62 for cooperating with the operating part. The handle mechanism 5 is provided with a handle limiting part 51 for limiting the linkage part 6. When the handle mechanism 5 rotates to the closing position, The handle limiting portion 51 rotates to correspond to the third linkage portion 62 of the linkage member 6, so that the linkage member 6 cannot rotate in the direction in which the locking protrusion 31 of the driving locking member 30 retracts into the circuit breaker housing 1, that is, 1 in the figure In the counterclockwise direction, it is impossible to install the circuit breaker into the cabinet or pull it out from the cabinet in the closed state, which improves the safety of electricity consumption. When the handle mechanism 5 rotates to the opening position, the handle limiting part 51 rotates to a position misaligned with the third linkage part 62 of the linkage part 6 to avoid the third linkage part 62. At this time, the linkage part 6 can rotate counterclockwise to open the circuit. The device is installed into the cabinet or removed from the cabinet. As shown in FIG. 1 , the handle limiting portion 51 of this embodiment is a limiting boss provided on the handle mechanism 5 .

Preferably, the handle mechanism 5 is also provided with an opening locking portion 52. When the handle mechanism 5 rotates to the opening position, the opening locking portion 52 rotates to a position corresponding to the third linkage portion 62 of the linkage member 6, At this time, the linkage 6 can rotate counterclockwise (see Figure 3).

At this time, when the locking member 30 is forced to retract the locking protrusion 31 into the circuit breaker housing 1 , the driving linkage 6 rotates through the third linkage part 62 to limit the opening locking part 52 , so that the handle mechanism 5 cannot Rotate toward the closing position so that the locking member 30 cannot be closed during the process of loading and unplugging the cabinet, thereby improving electrical safety; and/or the pulling mechanism 2 moves from the first position to the second position, or When moving from the second position to the third position, the linkage part 6 is driven to rotate through the second linkage part 61, and the linkage part 6 limits the opening locking part 52 through the third linkage part 62, so that the handle mechanism 5 cannot move to the closing position. Rotate, and at the same time, the linkage member 6 drives the locking member 30 to move through the first linkage part 63, so that the locking protrusion 31 retracts into the circuit breaker housing 1 (see Figure 2), that is, when the pulling mechanism 2 is unlocked and can perform the pulling operation. , cannot be closed to improve electricity safety. Correspondingly, when the handle mechanism 5 is in the opening position and the pulling mechanism 2 moves from the third position to the second position, or when the second position moves to the first position, the pulling mechanism 2 avoids the second linkage part. 61. The second elastic member 34 drives the locking member 30 to move so that the locking protrusion 31 extends out of the circuit breaker housing 1. The locking member 30 drives the linkage member 6 to rotate through the first linkage part 63, causing the third linkage part 62 to release the bisection. The gate locking part 52 is limited. Preferably, when the pulling mechanism 2 moves from the second position to the first position, that is, when the pulling mechanism 2 is in the locked state, the pulling mechanism 2 avoids the second linkage portion 61, and the second elastic member 34 drives the locking member 30 to lock and The linkage member 6 rotates, causing the third linkage part 62 to release the limit on the opening locking part 52, and then the closing operation can be performed. This prevents the user from leaving the pulling mechanism 2 in an unlocked state for a long time, so that the pulling part 21 can be operated for a long time. Easy to operate incorrectly. In this embodiment, the opening locking portion 52 is an opening locking groove.

As shown in Figures 4-5, a preferred embodiment of the drawing part 30, the limiting part 23 and the drawing part 21 are respectively provided at both ends of the sliding part 22. The sliding part 22 in this embodiment is cylindrical. The pulling part 21 is a circular plate, and the diameter of the circular plate is larger than the diameter of the sliding part 22. A pulling force can be applied through the circular plate to pull the circuit breaker out of the cabinet; the limiting part 23 includes at least A limiting protrusion 231 protrudes radially from the sliding part 22. The limiting part 23 in this embodiment is a long limiting block. The length of the limiting part 23 is greater than the diameter of the sliding part 22. In the sliding part Two limiting protrusions 231 are formed in the radial direction of 22 to allow the pulling member 30 to rotate 90 degrees to unlock and lock. Of course, the limiting portion 23 can also form only one limiting protrusion 231 or more limiting protrusions 231 .

Preferably, the pulling part 21 is provided with a rotating part 24, and the rotating part 24 is used to drive the pulling member 20 to rotate. In this embodiment, the rotating part 24 has a groove structure, and a screwdriver can be inserted into the rotating part 24 to drive the pulling part. When the pulling piece 20 rotates, preferably the rotating portion 24 is a straight groove, which can also be used as an indicator pointer 241 to indicate the rotating position of the pulling piece 20 . Of course, the rotating part 24 can also be a boss structure or other structures, and can be directly operated by human hands.

Preferably, the plug-in circuit breaker is provided with indication marks for instructing the operation of the pull-out part 20. The indication marks include a locking mark and an unlocking mark provided around the first assembly hole 8, as well as an indication mark provided on the pull-out piece 20. Indicating pointer 241, the locking mark and the unlocking mark are provided on the operating surface of the circuit breaker housing 1, and the indicating pointer 241 is used to indicate the rotation position of the pulling member 20. Preferably, the indicating pointer 241 is arranged parallel to the elongated limiting portion 23 .

Preferably, a first elastic member fixing portion 25 is provided on the side of the limiting portion 23 away from the drawing portion 21. One end of the first elastic member 7 is connected to the first elastic member fixing portion 25, and the other end is connected to the circuit breaker housing. The second elastic member fixing part 107 in 1 is connected. Both the first elastic member fixing part 25 and the second elastic member fixing part 107 may have a groove structure or a boss structure. In this embodiment, the first elastic member fixing part 25 and the second elastic member fixing part 107 both have a groove structure. The first elastic member 7 in this embodiment is a compression spring. Of course, it may also be a tension spring, a leaf spring, a torsion spring and other elastic members as needed.

Preferably, as shown in Figure 2, the limiting portion 23 also limits one end of the first assembly hole 8 inside the circuit breaker housing 1 so that the pulling member 20 will not come out of the first assembly hole 8. And it is used to limit the position of the circuit breaker housing 1 to pull out the circuit breaker from the cabinet, thereby simplifying the structure of the pulling piece 20 .

The limiting part 23 of this embodiment simultaneously plays the role of locking the pulling member 20 in cooperation with the first limiting part 101, serves as the unlocking part of the driving linkage 6, and installs the first elastic member 7. The function of the puller 20 to prevent it from coming out of the first assembly hole 8 and the function of limiting the position of the circuit breaker housing 1 to pull the circuit breaker out of the cabinet greatly simplifies the structure of the puller 20 . Of course, the pulling piece 20 can also be provided with an independent structure as an unlocking portion, or other independent structures for fixing the first elastic member 7 , or an independent limiting structure to prevent the limiting pulling piece 20 from being removed from the first assembly hole. 8, and pull out the circuit breaker from the cabinet with the limit of circuit breaker housing 1.

A first assembly hole 8 is provided on the operating surface of the circuit breaker housing 1 . The first assembly hole 8 includes a sliding hole 81 that slides and rotates with the sliding part 22 . The sliding part 22 can be in the sliding hole 81 The inner linear movement and rotation, the size of the sliding hole 81 matches the diameter of the sliding part 22; the first assembly hole 8 also includes a circular sinking groove 82, the circular sinking groove 82 is correspondingly arranged and connected to one end of the sliding hole 81, with In order to accommodate the circular plate serving as the pulling part 21, the other end of the sliding hole 81 cooperates with the limiting protrusion 231 to pull out the circuit breaker. When the pulling mechanism 2 is in the first position, the pulling part 21 is retracted into the circular sinking groove 82 .

It should be noted that the limiting part 23 of the drawing part 20 is not limited to being provided at one end of the drawing part 20 , it may also be provided in the middle of the sliding part 22 or close to the drawing part 21 , for example, the limiting part 23 is the limiting protrusion 231 provided in the radial direction of the middle part of the sliding part 22. A sliding groove for the limiting protrusion 231 to slide is provided on the inner wall of the first assembly hole 8 along the sliding direction. When the pulling member 20 is retracted, When the first assembly hole 8 is used, the inner wall of the first assembly hole 8 is provided with a rotation groove for the rotation of the limit protrusion 231 at a position corresponding to the limit protrusion 231. The rotation groove is connected with the sliding groove, and the first limit portion 101 is the rotation groove. When the limiting protrusion 231 rotates into the rotating groove and is misaligned with the sliding groove, it will be limited by the rotating groove, compressing the first elastic member 7 and unable to slide. At this time, the pulling member 20 is in the first position. When the limiting protrusion 231 When rotated to the position corresponding to the sliding groove, the first elastic member 7 drives the drawing member 20 to slide, so that the drawing part 21 extends out of the first assembly hole 8. At this time, the drawing member 20 is in the second position.

It should be noted that the locking and unlocking scheme of the pulling mechanism 2 and the circuit breaker housing 1 is not limited to the structure of the above embodiment. For example, the pulling mechanism 2 can also be provided with other transmission rods, and the pulling member 20 can be The rod indirectly cooperates with the circuit breaker limit. For another example, the pulling mechanism 2 can also adopt the structure of a non-automatic reset button, or the structure of an automatic button of an automatic pen, that is, the pulling part 20 is similar to a button, and when pressed for the first time, the pulling part 20 retracts into the assembly hole to limit the position. , the structure for the pull-out part 20 to pop out when pressed again, for example, a first limiting structure at multiple intervals is provided in the first assembly hole 8 to limit the pull-out part 20 in the first assembly hole 8, and the The pulling member 20 is limited to a plurality of second limiting structures at intervals in the ejection position. The first limiting structure and the second limiting structure are spaced apart in the sliding direction of the pulling member 20 and are located at different heights. The first limiting structure The limiting structure and the second limiting structure are connected through the driving ramp. When the drawing member 20 is pressed, the first elastic member 7 is compressed and the drawing member 20 is rotated through the guidance of the driving ramp. The drawing member 20 alternately rotates with the first elastic member 7 . The limiting structure cooperates with the second limiting structure so that the pulling member 20 alternates between retracting into the first assembly hole 8 and popping out of the first assembly hole 8 . Of course, other similar locking and unlocking solutions can also be adopted.

As shown in Figure 6, the handle mechanism 5 includes a handle piece, a handle rotation shaft 54 and an operating handle 53 radially connected to the handle rotation shaft 54. The handle piece is rotated and installed in the circuit breaker housing through the handle rotation shaft 54. Inside the body 4, the operating handle 53 extends outside the circuit breaker housing 1 for operation. A rotation groove is provided in the circuit breaker housing 1 of this embodiment, and the handle rotation shaft 54 is rotatably installed in the rotation groove. As another embodiment, also A rotating shaft can be provided in the circuit breaker housing 1, and a rotating hole is provided on the rotating shaft 54 of the handle, which is sleeved on the rotating shaft and rotates. A limiting boss serving as the handle limiting portion 51 is protruding in the radial direction of the handle rotation shaft 54 . Preferably, an opening locking groove serving as the opening locking portion 52 is recessed in the radial direction of the handle rotation shaft 54 . As other embodiments, the handle limiting portion 51 can also be provided with only the opening locking portion 52 instead of the limiting boss, and the circular side wall of the handle rotation shaft 54 can be directly used. When the handle mechanism 5 rotates to the opening position, The groove structure of the opening locking part 52 provides a space for the linkage 6 to rotate; when the handle limit part 51 is a limiting boss, the opening locking part 52 may not have a groove structure, and may directly use the side of the limiting boss. The wall is limited.

As shown in Figure 7, the linkage member 6 is provided with a pivot portion 64 in the middle, a first linkage portion 63 for driving the locking member 30 is provided at one end, and a second linkage portion for cooperating with the puller 20 is provided at the other end. 61 and a third linkage part 62 for cooperating with the operating member. Specifically, the linkage member 6 includes a pivot portion 64 provided with a rotation hole, which rotates with an axis in the circuit breaker housing 1 . The first drive is extended on the opposite side walls of the pivot portion 64 . arm and the second driving arm, the first driving arm is provided with a first linkage hole as the first linkage part 63, and a second linkage rib is protruding on one side of the second driving arm as the second linkage part 61. A third linkage rib is provided on the other side of the driving arm as a third linkage portion 62 . The linkage piece 6 is provided between the handle mechanism 5 and the pulling piece 20 , and the second linkage portion 61 extends to the moving path of the unlocking portion of the pulling piece 20 . The end 25 of the second driving arm also cooperates with the second limiting structure 106 in the circuit breaker housing 1 to limit the rotation angle and position of the linkage member 6 toward the side closer to the pulling member 20 . Obviously, the pivot portion 64 can also be provided with convex ribs at both axial ends to rotate and cooperate with the holes in the circuit breaker housing 1; the first linkage portion 63 can also not use a hole structure, or can be connected with the locking member. 30 is hinged or contact connected; the first linkage hole may be a waist-shaped hole, a circular hole, or a V-shaped hole, etc.

As shown in the embodiment shown in Figures 1-2, the locking mechanism 3 includes a locking piece 30. The locking piece 30 is linearly slidably arranged in the circuit breaker housing 1. The locking piece 30 is provided with a structure that can retract the circuit breaker housing. 1 and the locking protrusion 31 extending out of the circuit breaker housing 1. The second elastic member 34 drives the locking member 30 to slide linearly so that the locking protrusion 31 extends out of the circuit breaker housing 1. The sliding direction of the locking member 30 is perpendicular to the circuit breaker. the direction in which the device is inserted into the cabinet. The locking protrusion 31 is provided at one end of the locking member 30, and the other end of the locking member 30 is provided with a raised driving shaft. The driving shaft is inserted into the first linkage hole as the first linkage portion 63 of the linkage member 6 for linkage. A limiting structure 33 with a size larger than the locking hole 103 is provided to limit the moving position of the locking member 30 .

As another embodiment, the locking member 30 can be rotatably mounted on the circuit breaker housing 1. For example, the locking member 30 can be rotatably mounted in the middle. One end of the locking member 30 is provided with the locking protrusion 31 on the upper side, and the other end of the locking member 30 is provided with the locking protrusion 31. The protruding extension is provided with an unlocking arm, which cooperates with the first linkage portion 63 of the linkage member 6 , or the unlocking arm directly extends to the movement path of the puller 20 , and the puller 2 directly drives the locking member 30 .

As another embodiment, one end of the locking member 30 is rotatably installed in the circuit breaker housing 1, and the other end is provided with the locking protrusion 31 on the upper side. The first linkage portion 63 of the linkage member 6 is in contact with the locking member 30. 30 is provided with one end of the locking protrusion 31 for fitting.

The following further explains the cooperation process of the pulling mechanism 2, the locking mechanism 3 and the handle mechanism 5 of this embodiment with reference to Figures 1-3:

As shown in Figure 1, when the circuit breaker is in the closing state, the pulling mechanism 2 is embedded in the first assembly hole 8, and the limiting part 23 of the pulling member 20 is limitedly matched with the first limiting part 101, and the compression The first elastic member 7 is in the first position. At this time, the locking member 30 is in a locked state extending out of the circuit breaker housing 1 due to the reaction force of the second elastic member 34. At the same time, the handle limiter 51 of the handle mechanism 5 rotates. to the position corresponding to the third linkage part 62 of the linkage part 6. At this time, the linkage part 6 cannot rotate counterclockwise; if the circuit breaker is not inserted into the cabinet at this time, during the process of installing the circuit breaker into the cabinet, the locking part 3 will be squeezed by the cabinet. However, the handle limiter 51 of the handle mechanism 5 blocks the movement of the linkage 6, so that the locking piece 3 cannot move, and the locking protrusion 31 cannot retract into the circuit breaker housing 1, ensuring that the closed state cannot be inserted into the cabinet. ; If the circuit breaker has been inserted into the cabinet at this time, the pull-out mechanism 2 will be unlocked at this time, and the pull-out part 20 will not be able to drive the linkage 6 to move, ensuring that the circuit breaker cannot be pulled out in the closed state.

As shown in Figure 3, when the circuit breaker is in the opening state, the handle limiting part 51 of the handle mechanism 5 is misaligned with the third linkage part 62 of the linkage part 6. At this time, the third linkage part 62 of the linkage part 6 is in contact with the opening state. Corresponding to the locking part 52, the linkage part 6 can rotate counterclockwise; at this time, the circuit breaker can be inserted into the cabinet. During the process of inserting the circuit breaker into the cabinet, the locking part 30 slides linearly toward the inside of the circuit breaker due to the extrusion force of the cabinet, and the locking protrusion Lift 31 retracts into the circuit breaker housing 1, and at the same time, the linkage part 6 is driven by the locking part 3 to move counterclockwise. The third linkage part 62 can be transferred into the opening locking part 52. When the circuit breaker is not installed in place, the handle mechanism 5 It cannot be closed due to the limit of the linkage piece 6; after the circuit breaker is installed in place, the locking protrusion 31 corresponds to the limit hole on the cabinet, the locking piece 30 is reset by the second elastic piece 34, and the locking protrusion 31 extends out of the circuit breaker The outside of the housing 1 cooperates with the limit hole, and at the same time drives the linkage 6 to rotate clockwise, and the third linkage part 62 rotates out of the opening locking part 52. At this time, the circuit breaker cannot be pulled out from the cabinet, and the circuit breaker can pass through the handle mechanism 5. Carry out normal closing and opening operations.

As shown in Figure 2, when the circuit breaker is in the open state, rotate the pulling member 20 to the unlocking position (the unlocking mark is printed on the operating surface), so that the limiting portion 23 of the pulling member 20 and the first limiting portion 101 Dislocation, the force of the first elastic member 7 drives the pull-out part 20 to pop up, the pull-out part 21 extends out of the first assembly hole 8, and is in the second position where the pulling force can be applied, and the pull-out part 20 is limited during the pop-up process. The part 23 drives the linkage part 6 to rotate counterclockwise through the second linkage part 61, or the applied pulling force drives the pulling part 20 to continue to move to the third position limited by the circuit breaker housing 1. The limiting part 23 The second linkage part 61 drives the linkage part 6 to rotate counterclockwise; the counterclockwise rotation of the linkage part 6 drives the locking part 30 to move into the circuit breaker housing 1, causing the locking protrusion 31 to retract into the circuit breaker housing 1, and the linkage The third linkage part 62 of the component 6 can be turned into the opening locking part 52. At this time, the locking component 3 and the cabinet are in an unlocked state. The circuit breaker can be pulled out from the cabinet through the pulling mechanism 2, and at this time the handle mechanism 5 Cannot close. By pressing the pull-out part 20 back into the first assembly hole 8 and rotating the pull-out part 20 to the locking position (a lock mark is printed on the operating surface), the limiting part 23 and the first limiting part 101 are correspondingly limited. At this time, the pulling member 20 is in the first position, and the pulling member 20 no longer limits the linkage member 6. The second elastic member 34 drives the locking member 30 to move, and the locking protrusion 31 extends out of the circuit breaker housing 1, driving the linkage at the same time. The component 6 rotates clockwise, and the third linkage part 62 rotates out of the opening locking part 52. At this time, the handle mechanism 5 can perform closing and opening operations.

It should be noted that in the description of the invention, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship, or the orientation or positional relationship commonly placed during use, is only for convenience of description, and does not indicate that the device or component referred to must have a specific orientation, and therefore cannot be understood as a limitation on the invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions and cannot be understood as indicating relative importance.

The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be concluded that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which shall be deemed to fall within the protection scope of the present invention.

Claims (10)

1. A plug-in circuit breaker, including a circuit breaker housing (1), an operating member for driving the circuit breaker to open and close, and a locking mechanism (3). The locking mechanism (3) includes a circuit breaker that can extend out of the circuit breaker housing. The locking protrusion (31) outside the body (1) and in the retracted circuit breaker housing (1) is characterized in that it also includes a pulling mechanism (2) and a first elastic member (7). The pulling mechanism (2) includes a pull-out part (21) for applying pull-out force, and the circuit breaker housing (1) is provided with a first assembly hole (8) to accommodate a pull-out mechanism (2), which pull-out mechanism (2) ) moves to the first position, causing the first elastic member (7) to store energy and be limited in the first assembly hole (8) so that the user cannot operate the pulling part and release the limit on the pulling mechanism (2) When the first elastic member (7) drives the drawing mechanism (2) to move to the second position, the drawing part (21) extends out of the first assembly hole (8). 2. The plug-in circuit breaker according to claim 1, characterized in that: the pulling mechanism (2) includes an unlocking part, and the pulling mechanism (2) can drive the locking protrusion of the locking mechanism (3) through the unlocking part. (31) Retract into the circuit breaker housing (1). 3. The plug-in circuit breaker according to claim 2, characterized in that when the first elastic member (7) drives the pulling mechanism (2) to move to the second position, the pulling mechanism (2) is driven and locked through the unlocking part. The locking protrusion (31) of the mechanism (3) retracts into the circuit breaker housing (1); or, after the pulling mechanism (2) moves to the second position, a pulling force is applied to drive the pulling mechanism (2) to continue moving. To the third position, the locking protrusion (31) of the locking mechanism (3) is driven by the unlocking portion to retract into the circuit breaker housing (1). 4. The plug-in circuit breaker according to claim 1, characterized in that when the operating member moves to the closing position, it directly or indirectly limits the locking mechanism (3) so that the locking protrusion (31) cannot be retracted. return to the circuit breaker housing (1); when the operating part moves to the opening position, the limit on the locking mechanism (3) is released. 5. The plug-in circuit breaker according to claim 3, characterized in that: the locking mechanism (3) includes a locking piece (30) provided with a locking protrusion (31), and the second elastic piece (34) drives the locking The movement of the piece (30) causes the locking protrusion (31) to extend out of the circuit breaker housing (1). The pulling mechanism (2) directly or indirectly drives the locking piece (30) through the unlocking part to shrink the locking protrusion (31). return to the circuit breaker housing (1). 6. The plug-in circuit breaker according to claim 5, characterized in that: the locking mechanism (3) further includes a linkage piece (6), and the pulling mechanism (2) drives the locking mechanism (3) through the linkage piece (6). ), causing the locking protrusion (31) to retract into the circuit breaker housing (1). 7. The plug-in circuit breaker according to claim 6, characterized in that: the linkage piece (6) is rotatably arranged in the circuit breaker housing (1), and is provided with a first locking piece for cooperating with the locking piece (30). The linkage part (63) is a second linkage part (61) used to cooperate with the pulling mechanism (2), and a third linkage part (62) used to cooperate with the operating part; The operating part is a handle mechanism (5), and the handle mechanism (5) is provided with a handle limiter (51). When the handle mechanism (5) rotates to the closing position, the handle limiter (51) and The third linkage part (62) of the linkage part (6) corresponds so that the linkage part (6) cannot rotate in the direction in which the locking protrusion (31) of the driving locking part (30) retracts into the circuit breaker housing (1), When the handle mechanism (5) rotates to the opening position, the handle limiting portion (51) is misaligned with the third linkage portion (62) of the linkage piece (6). 8. The plug-in circuit breaker according to claim 7, characterized in that: the handle mechanism (5) is provided with an opening locking portion (52). When the handle mechanism (5) rotates to the opening position, the opening locking portion (52) opens. The gate locking part (52) corresponds to the third linkage part (62) of the linkage part (6); When the locking piece (30) is forced to retract the locking protrusion (31) into the circuit breaker housing (1), the driving linkage piece (6) rotates through the third linkage part (62) to the opening locking part (52). ) limit, so that the handle mechanism (5) cannot rotate to the closing position, and/or, when the pull-out mechanism (2) moves from the first position to the second position or the third position, it passes through the second linkage part ( 61) Drive the linkage part (6) to rotate, and the linkage part (6) limits the opening locking part (52) through the third linkage part (62), so that the handle mechanism (5) cannot rotate to the closing position, and at the same time, the linkage part (6) The component (6) drives the locking component (30) to move through the first linkage part (63), so that the locking protrusion (31) retracts into the circuit breaker housing (1). 9. The plug-in circuit breaker according to claim 8, characterized in that: when the handle mechanism (5) is located in the opening position and the pulling mechanism (2) moves to the first position, the second elastic member (34) The locking part (30) is driven to move so that the locking protrusion (31) extends out of the circuit breaker housing (1). The locking part (30) drives the linkage part (6) to rotate through the first linkage part (63), causing the third linkage part to rotate. Part (62) releases the limit on the opening locking part (52). 10. The plug-in circuit breaker according to claim 1, characterized in that: the pulling mechanism (2) includes a pulling part (20) provided with a pulling part (21), and the pulling part (20) ) is slidably and rotationally installed in the first assembly hole (8). By pressing and/or rotating, the puller (20) and the circuit breaker housing (1) can be limited or released from the puller (20). The limiting position of the circuit breaker housing (1) causes the pulling member (20) to move between the first position and the second position.