Blocking member and circuit breaker with quick closing function

Abstract

The present invention relates to a blocking member and a circuit breaker with a quick closing function. The present invention discloses a blocking member of an actuator with a movable contact arm, the movable contact arm being used to perform the quick closing function. The blocking member comprises, for example, an elongated member having a first end and a second end, wherein a portion of the elongated member is configured such that the blocking member arranged in a first position engages a portion of the movable contact arm of the actuator to restrict the movement of the movable contact arm, and the blocking member arranged in a second position is separated from the portion of the movable contact arm of the actuator to allow the movable contact arm to move.

Description

[0001] Information about divisional applications

[0002] This case is a divisional application. The parent case of this divisional application is an invention patent application with application date of March 1, 2017, application number 201710170020.7, and invention name “Blocking member and circuit breaker with fast closing function”. Technical Field

[0003] The present invention generally relates to circuit breakers, and more particularly to a blocking member for a circuit breaker having a rapid closing function. Background Art

[0004] A circuit breaker is an automatically operated electronic switch designed to protect an electrical circuit from damage caused by an overload or short circuit. The basic functions are to detect a fault condition and to interrupt the current.

[0005] Generally, in a circuit breaker, electrical contacts are held closed by a latch mechanism having separate first and second engageable members. Initially, the first member may be positioned to contact the second member to restrict and prevent movement of the second member so as to hold the electrical contacts in a closed position. The latch mechanism may be triggered by moving or pivoting the first member out of engagement with the second member to allow the second member to move and open the electrical contacts.

[0006] In addition, circuit breakers typically include a "quick close" feature that allows the electrical contacts to be quickly closed from a fully open position to a closed position. The closing speed of the electrical contacts is independent of how the handle operated by the user is used to perform the closing of the electrical contacts from the open position, i.e., the contact speed is independent of how fast or slow the handle is moved. A conventional over-center toggle mechanism implements a change in the orientation of the connecting rod relative to the spring tension so that at a certain critical point in the handle movement, the balance of forces will cause a rapid rotation of the connecting rod to quickly close the contacts. Summary of the invention

[0007] In one embodiment, the deficiencies of the prior art are overcome and additional advantages are provided by providing a blocking member of an actuator having a movable contact arm for performing a quick closing function. The blocking member includes, for example, an elongated member having a first end and a second end, wherein a portion of the elongated member is configured such that the blocking member disposed in a first position engages a portion of the movable contact arm of the actuator to restrict movement of the movable contact arm, and the blocking member disposed in a second position is disengaged from the portion of the movable contact arm of the actuator to allow movement of the movable contact arm.

[0008] In another embodiment, a circuit breaker with a quick closing function includes, for example, a frame, a fixed electrical contact attached to the frame, a movable contact arm having a first end capable of being attached to the frame and a second end capable of releasably contacting the fixed electrical contact, and an actuator mechanism. The actuator mechanism includes a main biasing means operable to apply a first force to move the movable contact arm in a first direction to open the electrical contact, a contact biasing means operable to apply a second force to move the movable contact arm in a second direction to close the electrical contact, and a blocking member configured such that the blocking member in a first position engages a portion of the movable contact arm to limit the movement of the movable contact arm and keep the electrical contact open by the biasing means main biasing means, and the blocking member arranged in a second position is separated from a portion of the movable contact arm to allow the movable contact arm to move by the contact biasing means to close the electrical contact.

[0009] In another embodiment, a method for moving a movable contact arm to perform a quick closing function includes, for example, engaging the movable contact arm with a blocking member to limit movement of the movable contact arm in a first direction, and disengaging the movable contact arm from the blocking member to allow the movable contact arm to move in the first direction.

[0010] In another embodiment, a method for actuating a circuit breaker to open and close electrical contacts includes, for example, engaging a movable contact arm with a blocking member to limit movement of the movable contact arm in a first direction and keep the electrical contacts open, and disengaging the blocking member from the movable contact arm to allow the movable contact arm to move in the first direction to close the electrical contacts.

[0011] In a specific embodiment of the present invention, a blocking member of an actuator with a movable arm is used to perform a quick closing function, and the blocking member includes: an elongated member having a first end and a second end; and wherein a portion of the elongated member is configured such that the blocking member arranged in a first position engages a portion of the movable arm of the actuator to limit the movement of the movable arm, and such that the blocking member arranged in a second position is separated from the portion of the movable arm of the actuator to allow the movable arm to move.

[0012] Further, the portion of the elongated member engageable with a portion of the movable arm is arranged between the first end and the second end of the blocking member.

[0013] Further, the portion of the elongated member includes a cutout for receiving the portion of the movable arm including the pin.

[0014] Further, the cutout is arranged between the first end and the second end of the elongated member.

[0015] Further, the blocking member defines a groove for receiving the movable arm therebetween.

[0016] Further, the blocking member comprises a V-shaped structure.

[0017] Further, the first end of the blocking member may be pivotably or fixedly attached to a frame of the actuator.

[0018] Further, the second end portion of the blocking member is movable in response to movement of the handle.

[0019] In one embodiment of the present invention, a circuit breaker with a quick closing feature comprises: a frame; a fixed electrical contact, the fixed electrical contact being attached to the frame; a movable arm, the movable arm having a first end capable of being attached to the frame and a second end having an electrical contact, the electrical contact being capable of releasably contacting the fixed electrical contact; and an actuator mechanism, the actuator mechanism comprising: a main biasing device, the main biasing device being operable to apply a first force to move the movable arm in a first direction to disconnect the electrical contact; a contact biasing device, the contact biasing device being operable to apply a second force to move the movable arm in a second direction to close the electrical contact; and a blocking member, the blocking member being configured such that the blocking member in a first position engages a portion of the movable arm to limit the movement of the movable arm and keep the electrical contact disconnected by the main biasing device, and the blocking member arranged in a second position is separated from the portion of the movable arm to allow the movable arm to move by the contact biasing device to close the electrical contact.

[0020] Further, the actuator also includes a handle, which can move a first distance to move the blocking member a first distance while limiting the movement of the movable arm in a second direction, and the handle can move another distance to separate the blocking member from the movable arm, thereby allowing the contact biasing device to close the electrical contacts.

[0021] Further, the circuit breaker includes a trigger operable to allow the biasing device to open the closed electrical contacts.

[0022] Further, the second direction is opposite to the first direction.

[0023] Further, the main biasing device includes a spring, and the contact biasing device includes a spring.

[0024] Further, the barrier arm may be pivotably or fixedly attached to the frame.

[0025] Further, the separation of the blocking member from the movable arm allows the biasing device to cause the electrical contacts to close in less than about 10 milliseconds or less.

[0026] In one embodiment of the present invention, a method for moving a movable arm to execute a quick closing feature comprises: engaging the movable arm with a blocking member to limit movement of the movable arm along a first direction; and separating the movable arm from the blocking member to allow movement of the movable arm along the first direction.

[0027] Further, the engagement includes moving the blocking member a first distance while restricting the movable arm from moving in the first direction, and the separation includes moving the blocking member another distance to separate the blocking member from the movable arm.

[0028] Further, the engagement includes moving the handle a first distance while restricting the movable arm from moving in the first direction, and the separation includes moving the handle a further distance to separate the blocking member from the movable arm.

[0029] In one embodiment of the present invention, a method for actuating a circuit breaker to open and close electrical contacts includes: engaging the movable arm with a blocking member to limit the movement of the movable arm in a first direction and keep the electrical contacts open; and separating the blocking member from the movable arm to allow the movable arm to move in the first direction to close the electrical contacts.

[0030] Further, the engagement includes moving the blocking member a first distance and keeping the electrical contacts open while restricting the movable arm from moving in the first direction, and the separation includes moving the blocking member another distance to separate the blocking member from the movable arm to close the electrical contacts.

[0031] Further, the engagement includes moving the handle a first distance and keeping the electrical contacts open while restricting the movable arm from moving in the first direction, and the separation includes moving the handle another distance to separate the blocking member from the movable arm to close the electrical contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other features, aspects and advantages of the present invention will be more clearly understood from the following detailed description of various aspects of the present invention in conjunction with the accompanying drawings, in which:

[0033] Figure 1is a perspective view, partially cut away, of a circuit breaker arranged in an ON state or position according to an embodiment of the present invention;

[0034] Figure 2 yes Figure 1 A partially cutaway perspective view of a circuit breaker arranged in an OFF position;

[0035] Figure 3-5 It indicates the transition from the open OFF state or position to the closed ON state or position. Figure 1 A partially cutaway perspective view and a side view of a circuit breaker;

[0036] Figure 6 yes Figure 1 A partially cutaway side view of a circuit breaker having a trip force applied to the retractable support to initiate a transition from a closed position to an open position;

[0037] Figure 7 yes Figure 1 A side view of a circuit breaker of claim 1, wherein the circuit breaker is in an open position after being tripped and transitioned from a closed position to an open position;

[0038] Figure 8 yes Figure 1 A perspective view of a retractable bracket of a circuit breaker;

[0039] Fig. 9 yes Figure 8 A front view of a retractable member of a support member;

[0040] Fig.10 It is along Fig. 9 A cross-sectional view of the retractable member of the retractable stent taken along line 10-10;

[0041] Fig.11 is a front view of a retractable stent according to another embodiment of the present invention;

[0042] Fig.12 yes Fig.11 A side view of a retractable stent;

[0043] Fig.13 yes Fig.11 An enlarged side view of an end portion of a retractable stent;

[0044] Fig.14 It is along Fig.11 An enlarged cross-sectional view of the retractable stent taken along line 14-14 in FIG.

[0045] Fig.15 is a schematic diagram of a retractable stent according to another embodiment of the present invention;

[0046] Fig.16and Fig.17 Schematically shows the Fig.15 A transition of an embodiment of a retractable stent from a rigid mode to a flexible mode, wherein the internal rotating member is restrained in the rigid mode;

[0047] Fig.18 and Fig.19 Schematically shows the Fig.15 The embodiment of the retractable stent is converted from a rigid mode to a flexible mode, wherein the internal rotating member is restrained in the rigid mode by functional parts of the connecting members that contact each other and restrain rotation;

[0048] Fig. 20 yes Figure 1 A front view of a blocking member of a circuit breaker;

[0049] Fig.21 yes Fig. 20 a side view of a blocking member;

[0050] Fig. 22 is a flow chart of a method for actuating a movable contact arm according to an embodiment of the present invention;

[0051] Fig.23 is a flow chart of a method for actuating a circuit breaker to open electrical contacts according to an embodiment of the present invention;

[0052] Fig.24 is a flow chart of a method for moving a movable contact arm to perform a quick closing function according to an embodiment of the present invention;

[0053] Fig.25 is a flow chart of a method for actuating a circuit breaker to open and close electrical contacts according to an embodiment of the present invention;

[0054] Fig.26 is a perspective view of a circuit breaker according to an embodiment of the present invention;

[0055] Fig. 27 yes Fig.26 A partially cutaway side view of a circuit breaker arranged in an OFF position;

[0056] Fig.28 It shows the start of the transition from the open OFF position to the closed position. Fig.26 A partially cutaway side view of a circuit breaker;

[0057] Fig.29 yes Fig.26 A partially cutaway side view of a circuit breaker arranged in a closed ON position;

[0058] Fig.30 yes Fig.26a partially cutaway side view of a circuit breaker of wherein a trip force is applied to the retractable support to initiate a transition from a closed position to an open position;

[0059] Fig.31 is the main effect diagram for horizontal loads;

[0060] Fig.32 is the principal effects plot for the buckling load; and

[0061] Fig.33 is the main effect diagram for axial and impact in buckling. DETAILED DESCRIPTION

[0062] Embodiments of the present invention and some of its functions, advantages and details are described more fully below with reference to the non-limiting examples shown in the accompanying drawings. Descriptions of well-known materials, processing techniques, etc. are omitted to avoid unnecessary obscurity of the details of the present invention. However, it should be understood that the detailed description and specific examples, although illustrating embodiments of the present invention, are only given by way of example rather than by way of limitation. Within the spirit and / or scope of the following inventive concept, those skilled in the art will more clearly understand various substitutions, improvements, additions and / or arrangements from the present invention.

[0063] In some embodiments, the present invention employs a retractable support such as a flexible member or a plurality of rigidly connected supports having a rigid structure or a mode for supporting forces in a compressive manner, which transforms to a flexible structure or a compliant mode based on tripping or buckling. This technology can be applied to an actuator / tripping mechanism for triggering a system such as a circuit breaker. A blocking member can also be provided for temporarily limiting the movement of such an actuator / tripping mechanism, thereby making the actuator / tripping mechanism a quick-closing actuator / tripping mechanism.

[0064] As will be understood from the following discussion, the present invention provides an actuator and circuit breaker, operable for holding electrical contacts in a closed position and for opening electrical contacts, which, compared to actuators and circuit breakers that use latching mechanisms to hold electrical contacts in a closed position and for opening electrical contacts, provide a simplified mechanism with fewer parts, lower cost, and easier manufacturing. This technology of the present invention can provide a circuit breaker with enhanced performance characteristics compared to conventional circuit breakers that use latching mechanisms.

[0065] Figure 1 An embodiment of a circuit breaker 10, such as a latchless circuit breaker, according to an embodiment of the present invention is shown. Figure 1 As shown, the circuit breaker 10 is arranged in the ON state or position. Figure 1 The embodiments are used to illustrate the functions of the present invention, but it is understood that the present invention is not limited to Figure 1 The construction of the circuit breaker is shown in FIG.

[0066] The circuit breaker 10 generally includes a frame 20, a fixed contact arm 30, a movable contact arm 40, and an actuator / trigger mechanism 100. The actuator / trigger mechanism 100 may generally include a retractable bracket 110, a handle 120, a crank 130, a blocking member 150, and a trip rod 160. As described in more detail below, the retractable bracket may have a rigid structure defining a linear axis and a flexible structure defining a non-linear axis. The retractable bracket can be operated in a rigid structure to support a compressive force along a linear axis for charging or energizing the circuit breaker and maintaining the circuit breaker in a closed structure. The retractable bracket can be operated in a flexible structure or an elastically bent structure to allow the circuit breaker to quickly transition to an open structure.

[0067] like Figure 1 As shown, the movable contact arm 40 includes a first end 41 having a movable contact 42 and a second end 43 pivotally attached to the frame 20 and capable of rotating about the pin 22. The fixed contact arm 30 includes a fixed contact 32. The retractable bracket 110 includes an upper end operably attached to the handle 120 and a lower end operably attached to the crank 130. The crank 130 is capable of pivoting about the pin 22 and includes two sets of biasing means such as springs, for example, the first biasing means is selected as a main spring 132 and the second biasing means is selected as a contact spring 134 (further described in Figure 2 ).

[0068] Figure 2-5 The operation of moving the circuit breaker 10 from the OFF state or position to the ON state or position and providing a rapid closing is shown, wherein the closing speed of the electrical contacts is independent of the handle movement speed. Figure 2-5 Shown is arranged in the disconnected OFF position ( Figure 2 ), initial movement of the handle to execute the ON position ( Figure 3 ), from the open OFF position to the closed ON position ( Figure 4 ) and in the closed ON position ( Figure 5 ) circuit breaker 10.

[0069] like Figure 2 Initially, the circuit breaker 10 is arranged in the OFF position and the handle 120 is arranged in the leftmost position. The handle 120 is arranged in the direction of arrow A from the leftmost position toward Figure 3 The movement of the handle from left to right is transmitted via the retractable support 110 in a rigid configuration, causing the crank 130 to rotate clockwise in the direction of arrow R. During this operation, the retractable support 110 remains rigid and does not flex. When the crank 130 rotates clockwise, the two sets of springs, the main spring 132 is stretched and the contact spring 134 (in Figure 1and Figure 2 10 (best shown in FIG. 10 ) is retracted to increase its stored energy. The main spring 132 acts to resist the movement of the handle and, without the reaction provided by the retractable bracket 110, will cause the crank 130 to rotate counterclockwise as described below. The contact spring 134 acts between the movable contact arm 40 and the crank 130 (or between the movable contact arm and the base) and is used to provide a contact force between the movable contact 42 of the movable contact arm 40 and the fixed contact 32 of the fixed arm 30 when in the closed position. The contact force is operable to reduce electrical contact resistance and any concurrent temperature rise.

[0070] In addition, if Figure 2 and Figure 3 As shown, the movable contact arm 40 exhibits a fully disconnected OFF position with a large gap between the electrical contacts 32 and 42. The two sets of springs in the crank 130, the main spring 132 and the contact spring 134, are loaded with elastic energy that causes a moment for moving the movable contact arm 40 downward, but any downward movement of the movable contact arm is restrained by the abutment, engagement and saddle or cutout 152 in the blocking member 150 (at Figure 1 and Figure 4 44 in the best shown in FIG).

[0071] like Figure 3 As further shown in FIG. 1 , the blocking member 150 includes a lower end 154 that is operably fixedly attached to the base of the frame 20 and an upper end 156 that is operably engaged with the stop rod 26 attached to the frame 20. For example, the fixedly restrained lower end 154 of the blocking member 150 generally biases the upper end 156 of the blocking member 150 toward and against the stop rod 26, for example, to provide a restoring force to the upper end 156 of the blocking member 150. As described above, the blocking member 150 provides additional contact points and restraint points for the movable contact arm 40. For example, the movable contact arm 40 includes a stop 44, such as a protrusion ( Figure 3 One of the projections is shown, the other projection is disposed on the opposite side of the movable contact arm 40). The stop 44 is releasably engageable and disposed in a saddle or cutout 152 in the blocking member 150 ( Figure 3 One of the saddles or cutouts 152 is shown, with the other saddle or cutout 152 disposed on the opposite side of the blocking member 150). Depending on the position of the blocking member 150, the saddle or cutout 152 blocks movement of the stop 44 of the movable contact arm 40 and effectively blocks movement of the movable contact arm 40 from the open OFF position to the closed ON position.

[0072] As described below, the blocking member 150 together with the retractable bracket 110, the movable contact arm 40 and the crank 130 allow the circuit breaker 10 to implement a fast closing function in which the contacts can be closed quickly. For example, the electrical contacts can be closed from a fully open position to a closed position in nearly a few milliseconds. Figure 3 As shown in FIG. 1 , the handle 120 is able to move within the slot 23 defined by the frame 20 because the side 127 of the handle 120 is spaced a distance D from the front edge 25 of the slot 23 .

[0073] Reference Figure 4 To close the electrical contacts, the handle 120 is further moved to the right in the direction of arrow B. The downward projection 122 attached to or as part of the handle 120 engages and begins to push the upper end 156 of the blocking member 150 to the right in the direction of arrow C and causes the blocking member 150 to pivot and / or flex about the lower fixed end 154. Figure 4 As shown, when the handle 120 moves to the fully forward position, the upper end 156 of the blocking arm 150 moves forward, the cutout 152 moves to the right, and the stopper 44 of the blocking arm 40 rides along the lower inner portion of the cutout 152 until the stopper 44 is no longer constrained in the cutout 152. Figure 4 As shown, once the stopper 44 is no longer restricted in the cutout 152, the movable contact arm 40 will be released and can rotate. Figure 5 As shown, by crank 130 (and specifically by spring 134 ( Figure 1 and Figure 3 )) The force applied to the movable contact arm 40 (not the force applied to the handle by the operator) causes the movable contact arm 40 to pivot and / or flex about the lower fixed end 154, causing the movable contact arm 40 to move downward in the direction of arrow E until the movable electrical contact 42 contacts and engages the fixed contact 32, thereby placing the circuit breaker 10 in the closed ON position. The final movement of the contact arm can be completed quickly, on the order of a few milliseconds. It will be appreciated that for the components described herein, the speed at which the contact gap is closed is independent of the speed at which the handle is moved from the OFF configuration to the ON configuration. For example, the electrical contacts can be closed in about 2 milliseconds to about 10 milliseconds.

[0074] From the current instructions and reference Figure 2-5 It is understood that when the handle is completely disconnected from the OFF position ( Figure 2 ) moves to the closed ON position ( Figure 5 ), since the movement of the handle 120 is transmitted via the retractable bracket 110, the crank 130 will rotate in a clockwise direction. In addition, the main spring 132 resists this movement and increases its energy storage. The contact spring 134 ( Figure 2 and Figure 3) forces the movable contact arm 40 to rest against the crossbeam 138 of the crank 130 ( Figure 1 ) or the fixed contact 30, depending on the position of the crank. For example, if the crank 130 is at or near the fully clockwise position, the movable electrical contact 42 will abut against the fixed contact 32 (e.g., a predefined or predetermined gap prevents the parts from contacting each other), and if the crank is in any other position, the lower portion of the movable contact arm 40 will abut against the crossbar 138 of the crank 130 ( Figure 1 ). It will also be appreciated that the reaction force acting on the handle 120 via the bent crank main spring assembly may be used to maintain the handle 120 in either the OFF or ON position once set therein by the operator.

[0075] Figure 5-7 The operation of the circuit breaker 10 is shown to transition from a fixed ON state or position to an OFF state or position and provide a rapid interruption, wherein the opening speed of the electrical contacts occurs rapidly. For example, Figure 5 The circuit breaker 10 is shown initially arranged in a fixed closed ON position, Figure 6 Indicates the tripping or initiation of a transition from the closed ON position to the open OFF position. Figure 6 Shows the fully disconnected OFF position of the trip.

[0076] As described in more detail below, the latchless circuit breaker can have a rapid interruption function generally provided by a retractable support 110 that can be operated in, for example, two configurations or modes, namely a rigid configuration or rigid mode and a flexible configuration or compliant mode. Figure 5 As shown, the retractable bracket 110 can be operated to carry an axial load between two pivot points in a rigid mode and support the axial load for an extended period of time. For example, the retractable bracket 110 can be operated to carry an axial load X to keep the crank 130 in place and keep the movable contact arm in a closed position.

[0077] In addition, if Figure 6 and Figure 7 As shown, the retractable bracket 110 can be released by the release rod 160 moving in the direction of arrow T to apply a guiding force F ( Figure 6 ), so that the retractable support 110 is deformed, flexed or bent, so that the retractable support 110 is transformed into a compliant mode, which provides little resistance to the axial load that holds the crank 130 in the clockwise position and the movable contact arm 40 in the closed position. When the retractable support 110 is released and transformed into a compliant or flexible mode that provides reduced or little axial resistance, the crank 130 moves around the pin 22 in the direction of arrow W ( Figure 7) rotates counterclockwise, the movable contact arm 40 rotates around the pivot 22 in the direction of arrow F ( Figure 7 ) pivots to quickly disconnect the electrical contacts 32 and 42.

[0078] For example, if the crank 130 is in its Figure 7 In the counterclockwise position shown, the contact spring will drive the movable contact arm 40 to abut against the cross beam 138 ( Figure 1 ) Figure 7 As shown, to reset the circuit breaker, the handle 120 is moved to the left in the direction of arrow G, which causes the retractable bracket to return to its rigid configuration. For example, as described below, the retractable bracket can have a curved cross-section so that when the handle 120 is moved to the left, the retractable bracket locks back to its normal rigid configuration. It is understood that other cross-sections, such as circular or oval, and the use of suitable materials and hardness can provide a retractable bracket that can be resiliently bent and lock back to its normal rigid configuration after bending.

[0079] Refer again Figure 1 , the electromagnetic solenoid 170 can be operably connected to trigger the movement of the trip rod 160, which causes the retractable support 110 to move from the rigid mode ( Figure 5 ) to compliant mode ( Figure 6 and Figure 7 ) and releases the movable contact arm 40 from contact with the fixed arm 30. The solenoid 170 may be controlled via an electronic unit or controller 175, which performs diagnostic tests prior to performing a trip of the circuit breaker. Although this description is made with respect to a single pole circuit breaker, it is understood that the techniques of the present invention may be applied to circuit breakers of 2, 3 or more poles.

[0080] From the present description, it can be appreciated that the retractable stent can be easily transformed from rigid to compliant using a small energy input in the form of force, torque, heat, electromagnetic energy, pressure, etc., and similarly, the retractable stent can be effortlessly reset from a compliant mode to a rigid mode. The retractable stent can reliably cycle between these states multiple times.

[0081] Figure 8-10An embodiment of a retractable support 110 according to an embodiment of the present invention is shown. In this embodiment, the retractable support 110 can be a yieldable member 112 supported between two end mountings 114 that can also include a swivel joint or pin 116, such as an elongated member, a flat elongated member, a thin sheet, a strip, etc., and other appropriately constructed members. In this embodiment, the elongated member can be a thin sheet or strip with a semicircular or curved cross-section that can be maintained throughout its length. The strip is attached to the end mountings and fixed with fasteners. Other attachment devices other than fasteners for fixing the strip can be appropriately used. The center or axis of the pin 116 can be biased relative to the strip by a distance Y. The distance Y can be defined as the distance between the edge of the strip and the center of the pin measured perpendicular to the axis of the retractable support.

[0082] As described above, the circuit breaker can be arranged in a closed ON position using a retractable support arranged in a rigid mode. In this mode, the retractable support can be loaded axially (i.e., in the direction of the line between the pins) to a great extent and maintained in a low stress state, which can be maintained for an extended period of time when uncertain. The ribbon cross-section, ribbon thickness and bias of the retractable support can be selected so that when the retractable support is axially loaded, a small input force can be applied to the midpoint of the ribbon perpendicular to the axis of the ribbon or can be applied near the end point, so that it will bend or bend and enter a compliant mode. In this bending or compliant mode, the end displacement can limit the deflection of about 1 / 5 of the length of the retractable support, so that the ribbon stress remains reasonably small and elastic, such as so that there is almost no or no permanent deformation or damage applied to the ribbon. It is understood that in the case of a ribbon with a semicircular cross-sectional shape, the ribbon is asymmetric and can have an asymmetric response to bending or flexing. The bias specification can also affect the asymmetry of bending or flexing.

[0083] In the embodiment of the retractable support, the end mounting piece can be a single or integral unit made of metal or plastic, which can accommodate the ribbon in the groove. The plastic end mounting piece can be injection molded. The metal end mounting piece can be injection molded, cast or machined. The fastening of the ribbon to the mounting piece can be achieved by various fasteners, adhesives, brazing, diffusion bonding, etc. The ribbon can include a constant cross-section and is manufactured by a continuous process such as rolling, extrusion or other means for forming. In other embodiments, the ribbon can have a non-constant cross-section and is manufactured by a non-continuous process. Although the present invention describes and shows a retractable support with a semicircular shape including a constant cross-section, it is understood that other shapes and structures can be appropriately adopted to provide a rigid mode and a compliant mode. In other embodiments, the retractable support can include a plurality of thin sheets or ribbons, such as separated or parallel thin sheets or ribbons, and can have a semicircular or curved cross-section. For example, a plurality of thin sheets or ribbons can allow the use of geometric constraints to tune or customize the hardness / bending / bending characteristics. Other geometric characteristics may affect the load capacity in the rigid mode, the response in the compliant mode, and the force input required for the transition, which may include customizing the retractable support response based on the width of the ribbon, the length of the ribbon, the thickness of the ribbon, the curvature of the ribbon, the material used for the ribbon, the retractable support setting relative to the end pivot (e.g., offset), and other characteristics.

[0084] Figure 11-14 A retractable bracket 1110 is shown according to an embodiment of the present invention. The retractable bracket 1110 may include a one-piece or integral design. The band and pin restraint may be formed from a single sheet. For example, the end mount may include an integrated pin of the same material. In other embodiments, such as Figure 11-14 The retractable bracket design shown can be formed from two or more separate pieces that are assembled together. The end mounts can include integrated pins or separate attachment pins of the same material.

[0085] In the above-described embodiments of the retractable stent, the unrestricted state or configuration may be a rigid state or rigid mode. That is, if all external forces and displacements are removed, the retractable stent will naturally relax to its unrestricted state or extended state. Thus, recovery from the compliant state or mode to the rigid state or mode may be achieved by removing the transition energy input or trigger input and allowing the end pin to rotate freely.

[0086] As described above, the transition of the retractable support from the rigid mode to the compliant mode may include a trip rod, a solenoid, and a control unit. In other embodiments, other or multiple types of energy may be used to force the retractable support to transition from the rigid mode to the compliant mode. For example, a magnetic field or an electromagnetic field may be used to change the state of a metal strip to bend or flex it. In another embodiment, the strip may be made of a bimetallic material or strip that can be changed into a compliant state by temperature changes. A torque may be applied to one and / or both end mounts to cause rotation and bending or flexing of the retractable support and transition from the rigid mode to the compliant mode.

[0087] Fig.15 A retractable bracket 2110 according to an embodiment of the present invention is schematically shown. In the illustrated embodiment, the retractable bracket includes two or more rigid connectors, such as connector 2112 and connector 2114. The connectors can be connected by joints 2210, 2212 and 2214, optionally, the joints are swivel or semi-swivel joints. The swivel joints can be arranged at the end mountings to provide two sets of swivel joints, for example, two end swivels and one or more internal swivels. The lower swivel joint 2214 can be connected by a pin, for example, connected to the frame of the circuit breaker by a pin.

[0088] As described below in conjunction with the rigid mode and the compliant mode, the reference line L extends between the end swivels. In an embodiment of the retractable stent 2110, the two rigid couplings may have equal lengths and thus include an internal swivel. The internal swivel 2212 may be offset from the end swivel line L by a distance W.

[0089] In compliant mode, if all swivels rotate freely and there are no other constraints, the retractable stent 2110 will have little or no resistance to end displacement. For example, because the coupling is rigid, the retractable stent will adapt to changes in configuration by rotating the coupling and moving the internal swivel 2112 further away from the end rotation line L when one of the ends is displaced toward the other in the direction of the end rotation line. In rigid mode, the internal swivel 2112 of the retractable stent 2110 may be constrained. For example, the transition to rigid mode is achieved by removing some degrees of freedom, such as by converting the internal swivel to non-rotation or supporting the internal coupling to restrict its movement.

[0090] Fig.16 and Fig.17 It shows that from the rigid mode ( Fig.16 ) to compliant mode( Fig.17 )In one embodiment of the transformation, the internal rotating member is constrained in a rigid mode. Fig.18 and Fig.19Shown from the rigid mode ( Fig.18 ) to compliant mode( Fig.19 ) another embodiment of the transition, wherein the inner rotating member is, for example, restricted in its rotation. In various embodiments, the transition force can be proportional to the applied axial force and the displacement distance of the inner rotating member. To reset the retractable support, the upper rotating member can be pushed upward and a torsional or linear force can be applied to the inner rotating member. As will be appreciated, the retractable support with a rigid coupling can be incorporated into, for example, a circuit breaker 10 ( Figure 1 ) in the circuit breaker.

[0091] Reference Fig. 20 and Fig.21 , the blocking member 150 may include a generally V-shaped configuration having a first leg 157 and a second leg 159. The lower end 154 of the first leg may be connected to the frame 20 ( Figure 1 ).

[0092] Referring again to the blocking member, the actuator mechanism or circuit breaker may include a blocking member that operates along different rotation axes (i.e., rotates around a certain offset axis compared to the rotation axis of the contact arm). The blocking member may have a rotation fixed point and include a rigid element or be made to be compliant or flexible (e.g., configured to and provide a function similar to a retractable bracket) and does not have a rotation axis. For example, in this case, such a blocking member can be flexed to move in and out of a blocking position. The blocking member can be triggered to release via many different devices as follows: crank position, handle position, separation button, logic controller, etc. The blocking member can also be made without a rotation axis. That is, the blocking member can be fastened to the base of the frame and elastically flexed to achieve a blocking configuration and a non-blocking configuration, for example, in accordance with an embodiment.

[0093] In other embodiments, the blocking member can be passively operated and does not require a separate release mechanism, such as notches and stops as described above. In this embodiment, the reach of the movable contact arm changes as the system is turned on. The blocking member can be set so that it interferes with the movable contact arm for all positions except when the handle is advanced to the ON position. The dual pivot design of the movable contact arm can establish and control this interference. During travel, the blocking member can be loosened to allow the movable contact to pass freely.

[0094] Fig. 22An embodiment of a method 300 for actuating a movable contact arm is shown. The method 300 may include, for example, applying a force at 310 to move the movable contact arm in a first direction; supporting a compressive force caused by and opposing the force applied to the movable contact arm along the linear axis using a retractable support arranged in a rigid configuration defining a linear axis to prevent the movable contact arm from moving in the first direction at 320; and applying a tripping force to the retractable support at 330 to convert the rigid configuration to a flexible configuration having a non-linear axis and to remove the support for the compressive force to allow the movable contact arm to move in the first direction.

[0095] Fig.23 One embodiment of a method 400 for actuating a circuit breaker to open and close electrical contacts is shown. The method 400 may include, for example, applying a first force operable to move a movable contact arm in a first direction to open electrical contacts at 410; applying a second force operable to move the movable contact arm in a second direction to close electrical contacts at 420; supporting a compressive force caused by and opposing the first force applied to the movable contact arm along the linear axis to prevent the closed electrical contacts from opening at 430 using a retractable support arranged in a rigid configuration defining a linear axis; and applying a tripping force to the retractable support to convert the rigid configuration to a flexible configuration having a non-linear axis and to remove support for the compressive force to allow the closed electrical contacts to open at 450.

[0096] Fig.24 An embodiment of a method 500 for moving a movable contact arm to perform a quick closing function is shown. The method 500 may include, for example, engaging the movable contact arm with a blocking member at 510 to limit movement of the movable contact arm in a first direction; and disengaging the movable contact arm from the blocking member at 520 to allow movement of the movable contact arm in the first direction.

[0097] Fig.25 One embodiment of a method 600 for actuating a circuit breaker to open and close electrical contacts is shown. The method 600 may include, for example, engaging a movable contact arm with a blocking member at 610 to limit movement of the movable contact arm in a first direction and keep the electrical contacts open; and disengaging the blocking member from the movable contact arm at 620 to allow the movable contact arm to move in the first direction to close the electrical contacts.

[0098] Fig.26 An embodiment of a circuit breaker 3010, such as a latchless circuit breaker, according to an embodiment of the present invention is shown. Fig.26 As shown, the circuit breaker 3010 is arranged in the ON state or position. Fig.26 The embodiments are used to illustrate the functions of the present invention, but it is understood that the present invention is not limited to Fig.26 The construction of the circuit breaker is shown in FIG.

[0099] The circuit breaker 3010 generally includes a frame 3020, a fixed contact arm 3030, a movable contact arm 3040 and an actuator / trigger mechanism 3100. The actuator / trigger mechanism 3100 may generally include a retractable bracket 3110, a handle 3120, a crank 3130, a blocking member 3150 and a trip rod 3160. As described in more detail below, the retractable bracket may have a rigid structure defining a linear axis and a flexible structure defining a non-linear axis. The retractable bracket can be operated in a rigid structure to support a compressive force along a linear axis for charging or energizing the circuit breaker and maintaining the circuit breaker in a closed structure. The retractable bracket can be operated in a flexible structure or an elastically bent structure to allow the circuit breaker to quickly transition to an open structure.

[0100] like Fig.26 As shown, the movable contact arm 3040 includes a first end 3041 having a movable contact 3042 and a second end 3043 pivotally attached to the frame 3020 and capable of rotating around a pin 3022. The fixed contact arm 3030 includes a fixed contact 3032. The retractable bracket 3110 includes an upper end operably attached to the handle 3120 and a lower end operably attached to the crank 3130. The crank 3130 is capable of pivoting around the pin 3022 and includes two sets of biasing devices such as springs, for example, a first biasing device such as a main spring 3132 and a second biasing device such as a contact spring 3134.

[0101] Figure 27-29 The operation of moving the circuit breaker 3010 from an OFF state or position to an ON state or position and providing a rapid closing is shown, wherein the closing speed of the electrical contacts is independent of how fast the handle is moved. Figure 27-29 Shown arranged in the disconnected OFF position ( Fig. 27 ), from the open OFF position to the closed ON position ( Fig.28 ) transition and placed in the closed ON position ( Fig.29 ) circuit breaker 3010.

[0102] First, refer to Fig. 27 And when the circuit breaker 3010 is arranged in the disconnected OFF position and the handle 3120 is arranged in the leftmost position ( Fig. 27 In the case of a rotation of the crank 3120 from the leftmost position in the direction of arrow J toward the position shown (not shown in the figure), the handle 3120 moves from the leftmost position in the direction of arrow J toward the position shown. The movement of the handle from left to right is transmitted via the retractable support 3110 in a rigid configuration, thereby causing the crank 3130 to rotate clockwise in the direction of arrow K. During this operation, the retractable support 3110 remains rigid and does not flex. When the crank 3130 rotates clockwise, the two sets of springs, the main spring 3132 and the contact spring 3134 ( Fig.26The main spring 3132 (partial view of the spring group is best shown in FIG. 1 ) is loaded or contracted to increase its energy storage. Fig.26 ) is used to resist the movement of the handle and, without the reaction provided by the retractable bracket 3110, will cause the crank 3130 to rotate counterclockwise as described below. The contact spring 3134 ( Fig.26 ) acts between the movable contact arm 3040 and the crank 3130 (or between the movable contact arm and the base) and is used to provide a contact force between the movable contact 3042 of the movable contact arm 3040 and the fixed contact 3032 of the fixed arm 3030 when in the closed position. The contact force can be operated to reduce electrical contact resistance and any concurrent temperature rise.

[0103] In addition, if Fig. 27 As shown, the movable contact arm 3040 is in a fully disconnected OFF position with a large gap between the electrical contacts 3032 and 3042. The two sets of springs in the crank 3130, the main spring 3132 ( Fig.26 ) and the contact spring 3134 are loaded with elastic energy, causing a torque for moving the movable contact arm 3040 downward, but any downward movement of the movable contact arm is prevented by the stopper 3044 which is set, engaged and restricted in the cutout 3152 in the blocking member 3150 by the movable contact arm 3040.

[0104] like Fig. 27 As further shown in FIG. 3 , the blocking member 3150 includes a lower end 3154 pivotally attached to the base of the frame 3020 via a pin 3024 and an upper end 3156 capable of operatively engaging with a stop 3026 attached to the frame 3020. For example, a spring 3158 generally biases the upper end 3156 of the blocking member 3150 toward and against the stop 3026, for example, the spring 3158 provides a restoring force to the upper end 3156 of the blocking member 3150. As described above, the blocking member 3150 provides additional contact points and limit points for the movable contact arm 3040. For example, the movable contact arm 3040 includes a stop 3044 ( Fig.26 3150), such as a protrusion extending outwardly from the movable contact arm 3040. The stop 3044 can be releasably engaged and disposed in a saddle or cutout 3152 of the blocking member 3150. Depending on the position of the blocking member 3150, the saddle or cutout 3152 prevents movement of the stop 3044 of the movable contact arm 3040, and in fact prevents the movable contact arm 3040 from moving from the open OFF position to the closed ON position.

[0105] As described below, the blocking member 3150, together with the retractable bracket 3110, the movable contact arm 3040 and the crank 3130, allows the circuit breaker 3010 to implement a fast closing function in which the contacts can be closed quickly. For example, the electrical contacts can be closed from a fully open position to a closed position in about a few milliseconds.

[0106] Reference Fig.28 To close the electrical contacts, the handle 3120 is further moved to the right in the direction of arrow L. The downward projection 3122 attached to or as part of the handle 3120 engages and begins to push the upper end 3156 of the blocking member 3150 to the right in the direction of arrow M and causes the blocking member 3150 to pivot about the pivot point 3024 in the direction of arrow N. When the handle 3120 is moved to the fully forward position (as shown in FIG. Fig.29 As shown in FIG. 1 , the upper end 3156 of the blocking arm 3150 moves forward, the cutout 3152 moves to the right, and the stopper 3044 of the blocking arm 3040 rides along the lower inner portion of the cutout 3152 until the stopper 3044 is no longer as Fig.28 As shown, it is limited to the cutout 3152.

[0107] Once the stop member 3044 is no longer constrained in the cutout 3152, as shown in FIG. Fig.28 Specifically, the force applied to the movable contact arm 3040 by the crank 3130 (not the force applied to the handle by the operator) causes the movable contact arm 3040 to pivot around the pin 3024, so that the movable contact arm moves downward in the direction of the arrow M, as shown in FIG. Fig.28 As shown, until the electrical contact 3042 contacts the fixed contact 3032, wherein the circuit breaker 10 is arranged in the closed ON position, as shown in FIG. Fig.29 As shown. The final movement of the contact arm can be completed quickly in a few milliseconds. It will be appreciated that for the components described herein, the speed at which the contact gap closes is independent of the speed at which the handle moves from the OFF configuration to the ON configuration. For example, the electrical contacts may close in about 2 milliseconds to about 10 milliseconds.

[0108] From reference Figure 27-29 From the current description, it can be understood that when the handle is moved from the fully disconnected OFF position to the closed ON position ( Fig.29 ), since the movement of the handle 3120 is transmitted via the retractable bracket 3110, the crank 3130 will rotate clockwise ( Fig. 27 ). In addition, the main spring 3132 ( Fig.26 ) resists this movement and increases its stored energy. Contact spring 3134 ( Fig.26 ) forces the movable contact arm 3040 to rest against the crossbeam 3138 of the crank 3130 ( Fig.26) or against the fixed contact 3032, depending on the position of the crank. For example, if the crank 3130 is in a fully clockwise position or near the fully clockwise position, the movable electrical contact 3042 will abut against the fixed contact 3032 (e.g., a predefined or predetermined gap prevents the parts from contacting each other), and if the crank is in any other position, the lower portion of the movable contact arm 3040 will abut against the crossbar 3138 of the crank 3130 ( Fig.26 It will also be appreciated that once set therein by the operator, the reaction force acting on the handle 3120 via the bent crank main spring assembly can be used to maintain the handle 3120 in the OFF or ON position.

[0109] Fig.29 , 30 27 illustrate the operation of a circuit breaker 3010 that moves from a fixed ON state or position to an OFF state or position and provides rapid interruption, wherein the opening speed of the electrical contacts occurs rapidly. For example, Fig.29 , 30 and 26 are shown arranged in a fixed closed ON position ( Fig.29 ), from the closed ON position to the open OFF position ( Fig.30 ) transition trip or start and placement in the fully disconnected trip OFF position ( Fig. 27 ) circuit breaker 3010.

[0110] As described in more detail below, a latchless circuit breaker can have a rapid interruption function generally provided by a retractable support 110, which can be operated in, for example, two configurations or modes, namely a rigid configuration or rigid mode and a flexible configuration or compliant mode. Fig.29 As shown, the retractable bracket 3110 can be operated to carry an axial load between two pivot points in a rigid mode and support the axial load for an extended period of time. For example, the retractable bracket 3110 can be operated to carry an axial load P to keep the crank 3130 in place and keep the movable contact arm in a closed position.

[0111] In addition, if Fig.30As shown, the retractable bracket 3110 can be released by the release rod 3160 moving in the direction of arrow S to apply a guiding force H on the retractable bracket along the length of the retractable bracket 3110 to deform, flex or bend the retractable bracket 3110, so that the retractable bracket 3110 is transformed into a compliant mode, which provides a little resistance to the axial load that maintains the crank 3130 in the clockwise position and the movable contact arm in the closed position. When the retractable bracket 3110 is released and transformed into a compliant or flexible mode that provides reduced or little axial resistance, the crank 3130 rotates counterclockwise around the pin 3022 in the direction of arrow Z, and the movable contact arm 3030 pivots around the pivot 3022 in the direction of arrow Y to quickly disconnect the electrical contacts 3032 and 3042, as shown in FIG. Fig.28 shown.

[0112] For example, if the crank 3130 is in its counterclockwise position, the contact spring will drive the movable contact arm 3040 to rest against the crossbar 3138 with a certain force. To reset the circuit breaker, the handle 3120 is moved to the left, which causes the retractable bracket to return to its rigid configuration. For example, as described above, the retractable bracket can have a curved cross-section so that when the handle 3120 is moved to the left, the retractable bracket locks back to its normal rigid configuration. It is understood that other cross-sections, such as circular or elliptical, and the use of suitable materials and hardness can provide a retractable bracket that can be resiliently bent and locks back to its normal rigid configuration after bending.

[0113] Refer again Fig.26 , the electromagnetic solenoid 3170 can be operably connected to trigger the movement of the trip bar 3160, which causes the retractable bracket 3110 to transition from a rigid mode to a compliant mode and causes the movable contact arm 3040 to break contact with the fixed arm 3030. The solenoid 3170 can be controlled via an electronic unit or controller 3175, which performs diagnostic tests before performing a trip of the circuit breaker. Although this description is made for a single-pole circuit breaker, it is understood that the technology of the present invention can be applied to circuit breakers with 2 poles, 3 poles, or more.

[0114] From the present specification, it will be appreciated that the collapsible stent can be easily transformed from rigid to compliant using small energy inputs in the form of force, torque, heat, electromagnetic energy, pressure, etc., and similarly the collapsible stent can be effortlessly reset from a compliant mode to a rigid mode. The collapsible stent can reliably cycle between these states multiple times.

[0115] As described above, the retractable bracket can be a resilient member, such as a coupling, a plurality of couplings, a thin sheet bending portion, a strip, a bending membrane, and a first swivel joint and a second swivel joint that allow a pin connection. The two end swivel joints or end mountings can be arranged parallel to each other and spaced apart by about 25 mm to about 40 mm for one or more embodiments of the circuit breaker, or the spacing is larger or smaller, for example, for other applications. The pin end connection can be connected to other linkage devices or components as needed and can or can alternatively not be able to rotate freely.

[0116] In the first or rigid mode, the retractable bracket may be capable of supporting a large load along the axis of the retractable bracket (i.e., along a line drawn between the swivel joint or end mounts at or near). In circuit breaker applications, the supported axial load may be about 100 Newtons to about 400 Newtons, and the pin may have a diameter of about 2 mm to about 3 mm. In the rigid mode, the coupling may be capable of maintaining the load for an extended period of time (up to about 10^8 seconds) and may be resilient to shock vibration and other harsh environmental conditions such as elevated temperature, humidity, etc.

[0117] In the second or compliant mode, the pins may be allowed to retract toward each other with little or no resistance. In applications for circuit breakers, the pins may contact each other in the compliant mode at about 1 / 5 of the pitch or about 5 mm to about 8 mm, or other appropriate distances depending on the specific needs of the application.

[0118] In the transition of the retractable stent from the rigid mode to the compliant mode, an input is required to set or change the configuration of the retractable stent. The input may be in the form of a force, pulse load, torque, thermal energy, electromagnetic energy, pressure, etc. It is desirable to have a low configuration change input energy threshold. For example, for use in a circuit breaker, the input energy may be in the form of a force of about 1 Newton to about 2 Newtons.

[0119] The retractable stent can be transformed from the compliant mode to the rigid mode by removing the input transformation energy and returning the pins to the original spacing. No other inputs may be required. Note that the two requirements for a successful transformation have the nature of a logical "AND" operation: both must be satisfied to return the device to the rigid mode, and if not, the device remains in the compliant mode, as shown in Table 1 below.

[0120] Table 1: Device status correlation

[0121] Energy input status End pin status Device Status Applied energy input Extended end pins Compliant state Unapplied energy input Extended end pins Rigid state Applied energy input Retracted end pins Compliant state Unapplied Capability Input Retracted end pins Compliant state

[0122] Therefore, the device can be classified as having two stable states between which the transition operation changes configuration. These are summarised in Table 2 below.

[0123] Table 2: Bidirectional connection status

[0124]

[0125] The techniques of the present invention can be effectively applied in electronic switching devices where large loads need to be supported to provide positive electrical contact forces, while small energy or force input is required to release the contact forces. In the case of circuit breakers, tripping of the electrical contacts can be achieved using a small pulse, such as that supplied by a heated bimetallic element or other means as described above.

[0126] Table 3 shows the results for a retractable stent with a ribbon length of 40 mm and a thickness of 0.12 mm.

[0127] Table 3

[0128]

[0129]

[0130] Fig.26 is the main effect diagram for horizontal loads. Fig. 27 is the principal effects plot for buckling loads. Fig.28 is the main effect diagram for axial and impact in buckling.

[0131] It will be appreciated that the technology of the present invention may be used for toggle type circuit breakers. In this case, the actuator may be used to make the final decision to close the contact arm and will be activated with another input from the user or via an electronic control unit (which will close the contacts after some self-diagnostic testing).

[0132] It is understood that the above description is intended to illustrate, not to limit. Those skilled in the art can make numerous changes and modifications here without departing from the basic spirit and scope of the present invention as defined by the following claims and their equivalents. For example, the above embodiments (and / or aspects thereof) can be used in combination with each other. In addition, without departing from the scope of the present invention, many modifications can be made to adapt specific situations or materials to the teachings of various embodiments. Although the size and type of materials described herein are intended to define the parameters of various embodiments, they are by no means limiting and are only examples. Many other embodiments are obvious to those skilled in the art on the basis of reviewing the above description. Therefore, the scope of each embodiment will be determined with reference to the appended claims together with the full scope of equivalent items granted by these claims. In the appended claims, the terms "including" and "wherein" are used as popular equivalents of the corresponding terms "including" and "wherein". In addition, in the following claims, the terms "first", "second" and "third" and the like are used only as marks and are not intended to impose numerical requirements on their objects. In addition, the term "operably" in conjunction with terms such as coupling, connecting, coupling, sealing, etc., is used herein to refer to connections formed by independent different parts that are directly or indirectly connected as well as parts formed integrally (i.e., one piece, integral or monolithic). In addition, the following claim limitations are not written in the form of means plus function unless such claim limitations expressly use the term "means for..." followed by a statement of function without additional construction. It is understood that not necessarily all of these objects or advantages described above can be achieved according to any particular embodiment. Thus, for example, those skilled in the art will recognize that the systems and techniques described herein can be implemented or performed in a manner that achieves or optimizes one advantage or a group of advantages as taught herein without necessarily achieving other objects or advantages as taught or proposed herein.

[0133] Although the present invention has been described in detail in conjunction with only a limited number of embodiments, it should be readily understood that the present invention is not limited to these disclosed embodiments. On the contrary, the present invention may be modified to incorporate any number of variations, changes, substitutes, or equivalents not previously described but compatible with the spirit and scope of the present invention. In addition, although various embodiments of the present invention have been described, it is understood that aspects of the present invention may include only some of the described embodiments. Therefore, the present invention is not to be considered limited by the above description, but only by the scope of the appended claims.

[0134] This written description uses examples, including the best mode, and also enables those skilled in the art to implement the invention, including making and using any device or system and performing any combined method. The patentable scope of the invention is defined by the claims and may include other examples that occur to those skilled in the art. If these other examples have structural elements that are not different from the literal language of the claims, or these other examples include equivalent structural elements that are not substantially different from the literal language of the claims, then these other examples are determined to be within the scope of the claims.

Claims

1. A blocking member of an actuator with a movable arm, the movable arm being used to perform a quick closing function, the blocking member comprising: An elongated member having a first end and a second end, wherein a portion of the elongated member is constructed such that: when the blocking member is arranged in a first position, the movable arm is arranged to pass through the blocking member and the blocking member engages a portion of the movable arm of the actuator to limit the movement of the movable arm, and when the blocking member is arranged in a second position, the movable arm is arranged to pass through the blocking member and the blocking member is separated from the portion of the movable arm of the actuator to allow the movable arm to move. 2 . The blocking member of claim 1 , wherein the portion of the elongated member that engages with a portion of the movable arm is disposed between the first end and the second end of the elongated member.

3. The blocking member of claim 1, wherein the portion of the movable arm includes a pin, and wherein the portion of the elongated member includes a cutout for receiving the pin.

4. The barrier member of claim 3, wherein the cutout is disposed between the first end and the second end of the elongated member.

5. The blocking member of claim 1, wherein the elongated member defines a recess for receiving the movable arm.

6. The barrier member of claim 1, wherein the elongated member comprises a V-shaped structure.

7. The blocking member of claim 1, wherein the first end of the elongated member is pivotably attachable to a frame of the actuator.

8. The blocking member of claim 1, wherein the second end of the elongated member is movable in response to movement of a handle.

9. A circuit breaker with a fast closing function, the circuit breaker comprising: a frame that supports the fixed electrical contacts; a movable arm having a first end attachable to the frame and a second end supporting a movable electrical contact, the movable electrical contact in contact with the fixed electrical contact; a first spring, wherein the first spring applies a first force to move the movable arm in a first direction to disconnect the movable electrical contact and the fixed electrical contact; a second spring, the second spring applying a second force to move the movable arm in a second direction to close the movable electrical contact and the fixed electrical contact; as well as A blocking member, wherein the blocking member is constructed so that: when the blocking member is arranged in a first position, the movable arm is arranged to pass through the blocking member and the blocking member engages a portion of the movable arm to limit the movement of the movable arm by the first spring, and when the blocking member is arranged in a second position, the movable arm is arranged to pass through the blocking member and the blocking member is separated from the portion of the movable arm to allow the movement of the movable arm by the second spring.

10. The circuit breaker of claim 9, further comprising a handle movable through a first distance to move the blocking member while the blocking member remains engaged with the portion of the movable arm, and movable through another second distance to disengage the blocking member from the portion of the movable arm.

11. The circuit breaker of claim 9, further comprising a trigger operable to allow a first spring to disconnect the movable electrical contact and the fixed electrical contact.

12. The circuit breaker of claim 9, wherein the second direction is opposite to the first direction.

13. The circuit breaker of claim 9, wherein the blocking member is pivotally attached to the frame.

14. The circuit breaker of claim 9, wherein separation of the blocking member from the portion of the movable arm allows the second spring to close the movable electrical contact and the fixed electrical contact in 10 milliseconds or less.

15. The circuit breaker of claim 9, wherein the blocking member comprises a V-shaped structure.

16. The circuit breaker of claim 9, wherein the portion of the movable arm includes a pin, and wherein the blocking member includes a cutout for receiving the pin.

17. The circuit breaker of claim 9, wherein the blocking member defines a recess for receiving the movable arm.

18. A method for executing a quick close feature, the method comprising: arranging the movable arm to pass through the blocking member; engaging a portion of the movable arm with the blocking member to limit movement of the movable arm in a first direction; disengaging the portion of the movable arm from the blocking member to allow movement of the movable arm in the first direction, Wherein the movable arm remains arranged to pass through the blocking member both when the movable arm is engaged with the blocking member and when the movable arm is separated from the blocking member.

19. The method of claim 18, wherein: engaging the portion of the movable arm with the blocking member includes moving the blocking member a first distance while restricting movement of the movable arm in the first direction; and Disengaging the portion of the movable arm from the blocking member includes moving the blocking member an additional second distance.

20. The method of claim 18, wherein: engaging the portion of the movable arm with the blocking member includes moving a handle a first distance while restricting movement of the movable arm in the first direction; and Disengaging the portion of the movable arm from the blocking member includes moving the handle an additional second distance.

Images