An intelligent miniature circuit breaker

Abstract

The present invention provides an intelligent miniature circuit breaker, comprising a housing, an incoming line terminal, an outgoing line terminal, a static contact, a moving contact operating mechanism, an arc extinguishing system, an electric operating mechanism, an overload protection mechanism, a short circuit protection mechanism, a current sampling device, and a button mechanism, wherein the electric operating mechanism comprises a motor, a worm, an inner handle, a torsion spring, a worm wheel, a swing rod, and a reset tension spring; the motor is installed in the housing; the worm is installed on the motor shaft; the inner handle is rotatably installed in a preset installation groove on the housing, and the inner handle is connected to the moving contact operating mechanism and the button mechanism through a jumper pull rod and a long pull rod respectively; the torsion spring is installed in the installation groove at the rear of the inner handle; the worm wheel is installed outside the inner handle and the gear teeth on the outer side thereof cooperate with the worm wheel; the swing rod is installed between the worm wheel and the moving contact operating mechanism; and the reset spring is pulled and installed between the swing rod and the housing. The present invention has a compact structure, occupies a small space, is simple to install, has stable and reliable operation, and can meet the space requirements of a communication cabinet.

Description

Technical Field

[0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to an intelligent miniature circuit breaker. Background Art

[0002] 5G communication is a strategic industry that the country supports and develops, and the construction of 5G networks is in full swing. However, the common miniature plug-in circuit breakers in the power distribution industry currently have the following problems: In existing circuit breakers, the electric operation structure uses a motor-driven multi-stage gear transmission to reduce speed. The multi-stage gear structure not only takes up a lot of space, but also does not meet the trend and requirements of miniaturization of circuit breakers. In addition, when the circuit breaker is switched manually or automatically, there are collisions and wear between the teeth, and the operation is unreliable for a long time. Secondly, the current sampling device of the existing circuit breaker is implemented by a manganese copper shunt, which has a connecting wire and is large in size, and also occupies a large space. Finally, the instantaneous tripping of the existing circuit breaker adopts a direct-acting coil structure, which has a complex structure and occupies a large space.

[0003] Due to the above shortcomings, the existing miniature plug-in circuit breakers cannot meet the needs of miniaturization and intelligence of 5G communication cabinets, so there is an urgent need to customize and design miniature circuit breaker products that specifically meet 5G needs. Summary of the invention

[0004] The above-mentioned problem has not been solved. The object of the present invention is to provide an intelligent miniature circuit breaker, which has a compact structure, is easy to install, operates stably and reliably, and can meet the space requirements of a communication cabinet.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] An intelligent miniature circuit breaker comprises a shell, incoming line terminals and outgoing line terminals arranged at the left and right ends of the shell, a static contact and a moving contact operating mechanism arranged in the middle of the shell, an arc extinguishing system and an electric operating mechanism respectively arranged at the left and right sides of the moving contact operating mechanism, an overload protection mechanism and a short-circuit protection mechanism respectively arranged at the upper and lower sides of the moving contact operating mechanism, a current sampling device connected in series between the incoming line terminals and the short-circuit protection mechanism, a button mechanism arranged at the lower right end of the shell, and a cylindrical push rod arranged on the rear side of the lock of the moving contact operating mechanism.

[0007] The electric operating mechanism includes a motor, a worm, an inner handle, a torsion spring, a worm wheel, a rocker arm, and a reset spring; the motor is installed in the housing near the button mechanism; the worm is installed on the motor shaft; the inner handle is rotatably installed in a preset installation groove on the housing and is located on the upper side of the worm, and the inner handle is connected to the moving contact operating mechanism and the button mechanism through a tripping pull rod and a long pull rod respectively, and can drive the circuit breaker to close or open through the button mechanism and the torsion spring; the torsion spring is installed in a preset groove at the rear of the inner handle and in the installation groove on the housing; the worm wheel is rotatably mounted on the outside of the inner handle and the gear teeth on its outer side cooperate with the worm; the rocker arm is rotatably installed between the worm wheel and the moving contact operating mechanism and corresponds to the position of the push rod, and the rocker arm can hit the moving contact operating mechanism under the drive of the worm wheel to trip and open the circuit breaker; the reset spring is pulled between the rocker arm and the housing and can reset the rocker arm after swinging.

[0008] Furthermore, a V-shaped air avoidance groove is provided on the side of the inner handle; a convex rib one extending into the air avoidance groove is provided on the front side of the worm wheel at a position corresponding to the air avoidance groove; a convex rib two located on the rear side of the convex rib one is provided on the side wall of the worm wheel, and the convex rib two can hit the rocker arm after the worm wheel rotates counterclockwise at a certain angle, and the rocker arm swings to the left under the impact of the convex rib two and then hits the push rod, pushing the lock of the moving contact operating mechanism to rotate and release the overlap of the tripping buckle (the tripping buckle will rotate under the action of the main tension spring, and the direction of the force of the main tension spring will change, pulling the moving contact to complete the opening; the opening of the moving contact will drive the tripping buckle to reset, and at the same time the circuit breaker current release loses power, and the lock is reset under the action of the lock torsion spring, and the tripping buckle and the lock are restored to stable overlap).

[0009] Furthermore, the intelligent miniature circuit breaker also includes a circuit board provided between the outlet terminal and the electric operating mechanism and provided with a control circuit, and a miniature circuit breaker is provided at a position corresponding to the worm gear on the circuit board.

[0010] Furthermore, a convex rib three is provided on the side wall of the worm wheel, which is located directly behind the convex rib one and below the convex rib two. The convex rib three can toggle the micro-break switch on the circuit board after the worm wheel rotates.

[0011] Furthermore, when the convex rib three-following worm gear rotates clockwise from the left side of the micro-break switch to the right side of the micro-break switch, the circuit breaker is closed; when the convex rib three-following worm gear rotates counterclockwise from the right side of the micro-break switch to the left side of the micro-break switch, the circuit breaker is opened.

[0012] Furthermore, the current sampling device is a manganese copper shunt; three pins plugged into the circuit board are provided at the bottom of the current sampling device; and a step is provided on each pin.

[0013] Furthermore, the width of the portion of the current sampling device inserted into the circuit board is smaller than the overall width of the current sampling device.

[0014] Furthermore, the button mechanism includes a button movably installed at the lower right end of the shell and a slider that can slide left and right and is installed between the button and the electric operating mechanism and connected to the button through a short pull rod; a long pull rod is pulled between the slider and the inner handle.

[0015] Furthermore, the short pull rod is a U-shaped pull rod.

[0016] The invention has a compact structure, occupies a small space, is easy to install, has stable and reliable operation, and can effectively meet the space requirements of a communication cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 It is a structural schematic diagram of the worm gear in the intelligent miniature circuit breaker of the present invention when it is in the initial position;

[0019] Figure 2 It is a schematic diagram of the structure when the worm gear in the intelligent miniature circuit breaker of the present invention is in the tripping and opening position;

[0020] Figure 3 It is a structural schematic diagram of the intelligent miniature circuit breaker of the present invention when the worm gear is in the electric closing position;

[0021] Figure 4 for Figure 1 A partial enlarged view of the moving contact operating structure and the electric operating mechanism;

[0022] Figure 5 for Figure 1 Rear view of the moving contact operating structure and the swing rod;

[0023] Figure 6 It is an assembly diagram of the intelligent miniature circuit breaker of the present invention at the inner handle and the worm gear;

[0024] Figure 7 It is a structural schematic diagram of the inner handle in the intelligent miniature circuit breaker of the present invention;

[0025] Figure 8 It is a structural schematic diagram of a worm gear in an intelligent miniature circuit breaker of the present invention;

[0026] Fig. 9 It is a structural schematic diagram of a current acquisition device in an intelligent miniature circuit breaker of the present invention;

[0027] As shown in the figure: 1-housing, 2-incoming terminal, 3-outgoing terminal, 4-static contact, 5-moving contact operating mechanism, 51-contact base, 52-moving contact, 53-lock, 54-trip buckle, 55-lock buckle torsion spring, 56-push rod, 6-arc extinguishing system, 7-motor, 8-long pull rod, 9-worm gear, 10-worm, 11-inner handle, 12-trip buckle pull rod, 13-rocker, 14-reset spring, 15-overload protection mechanism, 16-short circuit protection mechanism, 17-current sampling device, 18-button, 19-short pull rod, 20-slider, 21-circuit board, 22-micro-break switch, 23-avoidance groove, 24-convex rib one, 25-convex rib two, 26-convex rib three, 27-installation groove, 28-torsion spring. DETAILED DESCRIPTION

[0028] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0029] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0031] like Figure 1-3 As shown, an intelligent miniature circuit breaker of the present invention includes a housing 1, an incoming terminal 2, an outgoing terminal 3, a static contact 4, a moving contact operating mechanism 5, an arc extinguishing system 6, an electric operating mechanism, an overload protection mechanism 15, a short-circuit protection mechanism 16, a current sampling device 17, a button mechanism, and a circuit board 21.

[0032] The housing 1 is a conventional component of a circuit breaker and is used to carry and install various circuit breaker components.

[0033] The incoming terminal 2 and the outgoing terminal 3 are arranged at the left and right ends of the shell 1 and are both conventional components of the circuit breaker, adopting a conventional structure, wherein the incoming terminal 2 is two 8PIN connectors, one incoming terminal 2 is arranged at the upper left inside the shell 1 and is electrically connected to the overload protection mechanism 15, and the other incoming terminal 2 is electrically connected to the short-circuit protection mechanism 16 at the lower left inside the shell 1.

[0034] The stationary contact 4 is arranged in the middle of the housing 1 and corresponds to the position of the moving contact 52 .

[0035] The arc extinguishing system 6 is arranged on the left side of the moving contact operating mechanism 5, and is also a conventional component of the circuit breaker. It adopts a conventional structure and consists of an arc extinguishing chamber and metal arc-striking plates on the upper and lower sides of the arc extinguishing chamber. The upper end is connected to the incoming terminal 2 and the bimetallic plate of the overload protection mechanism 15 through the metal arc-striking plate, and the lower end is welded to the static contact 4 through the metal arc-striking plate.

[0036] The overload protection mechanism 15 and the short-circuit protection mechanism 16 are both conventional circuit breaker structures, and are respectively arranged on the upper and lower sides of the moving contact operating mechanism 5; one end of the bimetallic strip of the overload protection mechanism 15 is electrically connected to the moving contact 52 through a soft copper wire, and the other end is connected to the metal arc-starting strip at the upper end of the arc extinguishing system 6.

[0037] The current sampling device 17 is connected in series between the incoming terminal 2 and the short-circuit protection mechanism 16 , and the current sampling device 17 is a manganese-copper shunt.

[0038] The button mechanism is arranged at the lower right end of the housing 1, and comprises a button 18 movably mounted at the lower right end of the housing 1 and a slider 20 slidably mounted between the button 18 and the electric operating mechanism and connected to the button 18 via a short pull rod 19; a long pull rod 8 is pull-mounted between the slider 20 and the inner handle 11. The short pull rod 19 is a U-shaped pull rod.

[0039] like Figure 1 , Figure 4 , Figure 5As shown, the moving contact operating mechanism 5 is arranged in the middle of the housing 1 corresponding to the static contact 4, including a contact base 51, a moving contact 52, a lock 53, a jumper 54, a lock torsion spring 55, and a main tension spring (not shown in the figure); the contact base 51 is installed in the housing 1; the upper right side of the moving contact 52 is rotatably installed on the contact base 51, the lower end of the moving contact 52 is in contact with the static contact 4 (the main tension spring provides contact pressure for the moving contact 52), and the upper end is electrically connected to the overload protection mechanism 15 through a soft copper wire; the middle left side of the lock 53 is rotatably installed on the contact base 51 and is located in front of the rocker 13, and the lock is in the lock. A cylindrical push rod 56 is provided on the rear side of 53 corresponding to the rocker rod 13, which can contact the rocker rod 13 after the rocker rod 13 swings. The lock buckle 53 can push the moving contact 52 to the left to disengage the static contact 4 under the push of the rocker rod 13; the right end of the jump buckle 54 is snap-connected with the upper part of the lock buckle 53, and the left end is connected to the upper right part of the contact base 51 through a rivet; one end of the lock buckle torsion spring 55 is connected to the contact base 51, and the other end is connected to the lock buckle 53; one end of the main tension spring is connected to one side of the lower part of the moving contact, and the other end is connected to the jump buckle 54; in the case of non-fault tripping, the jump buckle 54 is acted upon by the main tension spring to maintain a stable overlap with the lock buckle 53.

[0040] like Figure 1 , Figure 4 , Figure 6 , Figure 7 , Figure 8 As shown, the electric operating mechanism is arranged on the right side of the moving contact operating mechanism, and includes a motor 7, a worm 10, an inner handle 11, a torsion spring 28, a worm wheel 9, a rocker rod 13, and a reset tension spring 14.

[0041] The motor 7 is installed in the housing 1 near the button mechanism to provide power for the rotation of the worm gear 9 and drive the circuit breaker to automatically close and open.

[0042] The worm 10 is mounted on the rotating shaft of the motor 7 .

[0043] The inner handle 11 is rotatably mounted in a mounting groove 27 preset on the housing 1 and is located on the upper side of the worm 10. The inner handle 11 is connected to the moving contact operating mechanism 5 and the button mechanism through the tripping pull rod 12 and the long pull rod 8, respectively, and can drive the circuit breaker to close or open through the button mechanism and the torsion spring 28 (the inner handle 11 is connected to the moving contact operating mechanism 5 through the tripping pull rod 12, and the inner handle 11 is connected to the slider 20 of the button mechanism through the long pull rod 8). The inner handle 11 cooperates with the button mechanism and the torsion spring 28 to drive the circuit breaker to close or open. A V-shaped avoidance groove 23 is provided on the side of the inner handle 11.

[0044] The torsion spring 28 is installed in a groove preset at the rear of the inner handle 11 and a mounting groove 27 on the outer shell 1 to provide power for the inner handle 11 to return to its original position.

[0045] The worm wheel 9 is rotatably mounted on the outside of the inner handle 11 and the gear teeth on the outside thereof are matched (engaged) with the worm 10. A convex rib 24 extending into the cavitation groove 23 is provided on the front side of the worm wheel 9 at a position corresponding to the cavitation groove 23. The convex rib 24 rotates with the worm wheel 9 and contacts the two sides of the cavitation groove 23 of the inner handle 11, which can drive the inner handle 11 to rotate. A convex rib 25 is provided on the side wall of the worm wheel 9, which is located at the rear side of the convex rib 24. The convex rib 25 can hit the swing rod 13 after the worm wheel 9 rotates counterclockwise at a certain angle. The swing rod 13 swings leftward under the impact of the convex rib 25 and then hits the swing rod 13. The push rod 56 of the lock buckle 53 is hit, so that the lock buckle 53 rotates and releases the overlap with the trip buckle 54. The trip buckle 54 rotates under the action of the main tension spring, and the direction of the main tension spring force changes, pulling the moving contact 52 (separated from the static contact 4) to complete the opening. The opening of the moving contact 52 will drive the trip buckle 54 to reset, and at the same time, the overload protection mechanism 15 and the short-circuit protection mechanism 16 lose power. The lock buckle 53 is reset under the action of the lock buckle torsion spring 55, and the trip buckle 54 and the lock buckle 43 resume stable overlap.

[0046] The swing rod 13 is rotatably installed between the worm gear 9 and the moving contact operating mechanism 5 (to be precise, it is installed between the worm gear 9 and the tripping buckle 54 and is located at the rear side of the tripping buckle 54, corresponding to the position of the push rod 56 on the tripping buckle 54) and can strike the moving contact operating mechanism 5 (strike the push rod 56 on the tripping buckle 54) under the drive of the worm gear 94, drive the tripping buckle 54 to rotate, and trip the circuit breaker.

[0047] Described reset tension spring 14 is pulled and installed between pendulum rod 13 and shell 1 and can make pendulum rod 13 reset after swinging.After convex rib 25 rotates clockwise with worm gear 9 to not contact with pendulum rod 13, reset tension spring 14 can pull pendulum rod 13 to reset. Embodiment 2

[0048] The difference between this embodiment and the first embodiment is that:

[0049] like Figure 1 As shown, the intelligent miniature circuit breaker further includes a circuit board 21 disposed between the outlet terminal 3 and the electric operating mechanism and provided with a control circuit. The control circuit on the circuit board 21 can drive the motor 7 to rotate. The left end of the circuit board 21 extends to the bottom of the current sampling device 17. Fig. 9 As shown, three pins are provided at the bottom of the current sampling device 17 to be plugged into the circuit board 21; each pin is provided with a step. The width of the portion of the current sampling device 17 inserted into the circuit board 21 is smaller than the overall width of the current sampling device 17. Embodiment 3

[0050] The difference between this embodiment and the second embodiment is that:

[0051] like Figure 1 , Figure 4As shown, a micro-break switch 22 is provided on the circuit board 21 at a position corresponding to the worm gear 9. A convex rib 3 26 is provided on the side wall of the worm gear 9, which is located directly behind the convex rib 1 24 and below the convex rib 25. The convex rib 3 26 can toggle the micro-break switch 22 on the circuit board 21 after the worm gear 9 rotates, so that the circuit breaker is energized or de-energized.

[0052] When the convex rib 3 26 rotates clockwise from the left side of the micro-breaker switch 22 to the right side of the micro-breaker switch 22 along with the worm gear 9, the circuit breaker is closed at this time, the convex rib 3 26 toggles the micro-breaker switch, and the micro-breaker switch 22 transmits the closing state signal of the circuit breaker to the circuit board 21, and the circuit board 21 controls the circuit breaker closing signal light to light up.

[0053] When the convex rib 3 26 rotates counterclockwise from the right side of the micro-break switch 22 to the left side of the micro-break switch 22 along with the worm gear 9, the circuit breaker is opened, and the convex rib 3 26 toggles the micro-break switch 22. The micro-break switch 22 transmits the circuit breaker opening state signal to the circuit board 21, and the circuit board 21 controls the circuit breaker opening signal light to light up.

[0054] Working principle of circuit breaker contact opening and closing:

[0055] The intelligent miniature circuit breaker described in this working principle includes all the technical features disclosed in embodiments 1 to 3.

[0056] A. Manual opening and closing:

[0057] When the circuit breaker is powered on, the control circuit controls the motor 7 to drive the worm gear to rotate to Figure 2 In the position shown, the circuit breaker is in the open state, at which time the convex rib 1 24, the convex rib 25, and the convex rib 3 26 are all located on the left side of the micro-breaker switch 22. When the circuit breaker is authorized, the control circuit controls the motor 7 to drive the worm gear 9 to rotate to Figure 1 In the position shown, rib 1 24 is located at the left side wall of the avoidance groove 23 (a clearance groove is provided on the left side wall of the avoidance groove 23, and rib 1 24 needs to rotate counterclockwise by a certain angle to enter the clearance groove before the inner handle 11 can be driven to rotate counterclockwise), rib 2 25 is located on the left side of the micro-break switch 22, rib 3 26 is located on the right side of the micro-break switch 22, and the closing signal light is on; then the button 18 can be pulled or pressed to perform manual opening and closing actions.

[0058] A1. Figure 1The steps for manual opening starting from the position shown are: pulling the button 18 outward to extend it out of the housing 1, the button 18 pulls the slider 20 to move to the right through the short pull rod 19, and while the slider 20 moves, the inner handle 11 is pulled counterclockwise by the long pull rod 8. After the inner handle 11 rotates counterclockwise by a certain angle, the tripping buckle 54 is pulled by the tripping buckle pull rod 12 to rotate synchronously with the lock buckle 53 clockwise (rotate toward the outlet terminal 3). After a certain angle, the direction of the main tension spring force changes, pulling the moving contact 52 to rotate and disengage from the static contact 4, the circuit breaker is opened, the lock buckle torsion spring 55 stores energy, and the rotation of the inner handle 11 causes the right side wall of the avoidance groove 23 to hit the right side surface of the convex rib 1 24, and after pushing the worm gear 9 to rotate counterclockwise by a certain angle, the convex rib 3 26 is synchronously rotated to the left and the micro-break switch 22 is turned left, and the opening signal lights up.

[0059] A2. By Figure 1 The steps of manual closing starting from the position shown are: since the tripping catch 54 and the locking catch 53 are not unlocked at this time, the moving contact 52 and the static contact 4 are in contact with each other, and the circuit breaker is actually in the closed state and no closing operation is required.

[0060] A3. The operation steps of manual closing are as follows: the button 18 is pressed inward to retract it into the housing 1, and the button 18 pushes the slider 20 to move to the left through the short pull rod 19. While the slider 20 moves, the long pull rod 8 pushes the inner handle 11 to rotate clockwise. After the inner handle 11 rotates clockwise by a certain angle, the tripping buckle 54 is pushed to rotate counterclockwise to reset through the tripping buckle pull rod 12. At the same time, the lock buckle torsion spring 55 releases energy and also pushes the lock buckle 53 to rotate counterclockwise to reset synchronously (so that the lock buckle 53 always maintains effective overlap with the tripping buckle 54). With the reset of the tripping buckle 54, the direction of the main tension spring force changes, and the moving contact 52 is pulled to close again (to maintain effective contact with the static contact 4 again). While the inner handle 11 rotates clockwise, the left side wall of the air avoidance groove 23 hits the left side surface of the convex rib 1 24, and pushes the worm gear 9 to rotate clockwise by a certain angle, so that the convex rib 3 26 rotates to the left synchronously and turns the micro-break switch 22 to the right, and the closing signal lights up.

[0061] B. Electric opening and closing:

[0062] When the circuit breaker is powered on, the control circuit controls the motor 7 to drive the worm gear to rotate to Figure 2 In the position shown, the circuit breaker is in the open state, at which time the convex rib 1 24, the convex rib 25, and the convex rib 3 26 are all located on the left side of the micro-breaker switch 22. When the circuit breaker is authorized, the control circuit controls the motor 7 to drive the worm gear 9 to rotate to Figure 1In the position shown, the convex rib 1 24 is located at the left side wall of the avoidance groove 23 (the left side wall of the avoidance groove 23 is provided with a clearance groove, and the convex rib 1 24 needs to rotate counterclockwise by a certain angle to enter the clearance groove before the inner handle 11 can be driven to rotate counterclockwise), the convex rib 25 is located on the left side of the micro-break switch 22, and the convex rib 3 26 is located on the right side of the micro-break switch 22. The closing signal light is on, and the torsion spring 28 is in the energy storage state; then the motor 7 can rotate to drive the worm gear 9 to Figure 3 Position closing or you can also turn the drive worm gear 9 to Figure 2 Position gate.

[0063] B1. By Figure 1 The steps of starting electric opening at the position shown are: the motor 7 starts to drive the worm wheel 9 to rotate counterclockwise. After the worm wheel 9 rotates counterclockwise by a certain angle, the convex rib 25 hits the swing rod 13. The swing rod 13 swings to the left under the impact of the convex rib 25 and hits the push rod 56 of the lock buckle 53, pushing the lock buckle 53 to rotate, so that the lock buckle 53 rotates and disconnects the jump buckle 54. The jump buckle 54 will rotate under the action of the main tension spring, and the direction of the main tension spring force will change, pulling the moving contact 52 (separated from the static contact 4) to complete the opening; the opening of the moving contact 52 will drive the jump buckle 54 to reset, and at the same time, the overload protection mechanism 15 and the short-circuit protection mechanism 16 will lose power, and the lock buckle 53 will reset under the action of the lock buckle torsion spring 55, and the jump buckle 54 and the lock buckle 53 will resume stable overlap. At the same time, the convex rib 3 26 synchronously rotates to the left to the left side of the micro-break switch 22, and the micro-break switch 22 turns left, and the opening signal lights up.

[0064] In addition, when the worm wheel 9 rotates counterclockwise, the convex rib 24 rotates counterclockwise and enters the give way groove on the left wall of the escape groove 23 of the inner handle 11 and contacts the inner handle 11. The worm wheel 9 rotates counterclockwise and drives the inner handle 11 to rotate counterclockwise for a certain angle and then stops (such as Figure 2 As shown in the figure, at this time, the torsion spring 28 releases energy to further push the inner handle 11 to rotate counterclockwise and push the slider 20 to move to the right through the long pull rod 8 (the jump button pull rod 12 pulls the jump button 54 and the lock button 53 to rotate clockwise at a certain angle synchronously), and the slider 20 pushes the button 18 out of the housing 1 through the short pull rod 19, presenting as shown in the figure. Figure 2 Status shown.

[0065] B2. By Figure 1 The steps of starting electric closing from the position shown are: since the tripping catch 54 and the locking catch 53 are not unlocked at this time, the moving contact 52 and the static contact 4 are in contact with each other, and the circuit breaker is actually in the closed state and no closing operation is required.

[0066] B3. From the last off state of step B1 ( Figure 2The operation steps of starting electric closing are as follows: the motor 7 is started to drive the worm wheel 9 to rotate clockwise. As the worm wheel 9 rotates clockwise, the convex rib 24 rotates clockwise and sticks to the right side wall of the escape groove 23 of the inner handle 11 to drive the inner handle 11 to rotate clockwise. After the inner handle 11 rotates clockwise, on the one hand, the jumper 54 and the lock buckle 53 are pushed to reset through the jumper pull rod 12, so that the direction of the main tension spring force is changed, and the moving contact 52 is pulled to close the circuit again (to maintain effective contact with the static contact 4 again). On the other hand, the slider 20 is pulled to the left through the long pull rod 8, and the slider 20 is retracted into the housing 1 through the short pull rod 19 to pull the button 18, presenting as shown in the figure. Figure 3 The worm gear 9 rotates clockwise and the convex rib 3 26 rotates to the right to the right side of the micro-break switch 22 and turns the micro-break switch 22 to the right, and the closing signal lights up.

[0067] It should be noted that the terms "comprises", "includes" or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0068] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An intelligent miniature circuit breaker, comprising a housing, an incoming line terminal and an outgoing line terminal arranged at the left and right ends of the housing, a static contact and a moving contact operating mechanism arranged in the middle of the housing, an arc extinguishing system and an electric operating mechanism arranged at the left and right sides of the moving contact operating mechanism, respectively, an overload protection mechanism and a short circuit protection mechanism arranged at the upper and lower sides of the moving contact operating mechanism, respectively, a current sampling device connected in series between the incoming line terminal and the short circuit protection mechanism, a button mechanism arranged at the lower right end of the housing, and a cylindrical push rod arranged on the rear side of the lock of the moving contact operating mechanism; Features: The electric operating mechanism includes a motor, a worm, an inner handle, a torsion spring, a worm wheel, a rocker arm, and a reset spring; the motor is installed in the housing near the button mechanism; the worm is installed on the motor shaft; the inner handle is rotatably installed in a preset installation groove on the housing and is located on the upper side of the worm, and the inner handle is connected to the moving contact operating mechanism and the button mechanism through a tripping pull rod and a long pull rod respectively, and can drive the circuit breaker to close or open through the button mechanism and the torsion spring; the torsion spring is installed in a preset groove at the rear of the inner handle and in the installation groove on the housing; the worm wheel is rotatably mounted on the outside of the inner handle and the gear teeth on its outer side cooperate with the worm; the rocker arm is rotatably installed between the worm wheel and the moving contact operating mechanism and corresponds to the position of the push rod, and the rocker arm can hit the moving contact operating mechanism under the drive of the worm wheel to trip and open the circuit breaker; the reset spring is pulled between the rocker arm and the housing and can reset the rocker arm after swinging.

2. According to claim 1, the intelligent miniature circuit breaker, Features A V-shaped avoidance groove is provided on the side of the inner handle; a convex rib 1 extending into the avoidance groove is provided on the front side of the worm wheel at a position corresponding to the avoidance groove; a convex rib 2 located on the rear side of the convex rib 1 is provided on the side wall of the worm wheel, and the convex rib 2 can hit the swing rod after the worm wheel rotates counterclockwise at a certain angle, and the swing rod swings to the left under the impact of the convex rib 2 and then hits the push rod, pushing the lock of the moving contact operating mechanism to rotate and release the jump buckle.

3. According to claim 2, the intelligent miniature circuit breaker, Features : It also includes a circuit board arranged between the outlet terminal and the electric operating mechanism and provided with a control circuit, and a micro-break switch is provided at a position corresponding to the worm gear on the circuit board.

4. According to claim 3, the intelligent miniature circuit breaker, Features A convex rib three is provided on the side wall of the worm wheel, which is located directly behind the convex rib one and below the convex rib two. The convex rib three can toggle the micro-break switch on the circuit board after the worm wheel rotates.

5. According to claim 4, the intelligent miniature circuit breaker, Features : When the convex rib three-following worm gear rotates clockwise from the left side of the micro-break switch to the right side of the micro-break switch, the circuit breaker is closed; when the convex rib three-following worm gear rotates counterclockwise from the right side of the micro-break switch to the left side of the micro-break switch, the circuit breaker is opened.

6. The intelligent miniature circuit breaker according to claim 1, Features :The current sampling device is a manganese copper shunt; three pins are provided at the bottom of the current sampling device and are plugged into the circuit board; each pin is provided with a step.

7. The intelligent miniature circuit breaker according to claim 6, Features : The width of the portion of the current sampling device inserted into the circuit board is smaller than the overall width of the current sampling device.

8. The intelligent miniature circuit breaker according to any one of claims 1 to 7, Features The button mechanism comprises a button movably mounted at the lower right end of the housing and a slider which can slide left and right and is mounted between the button and the electric operating mechanism and is connected to the button through a short pull rod; a long pull rod is pulled between the slider and the inner handle.

9. The intelligent miniature circuit breaker according to claim 8, Features : The short pull rod is a U-shaped pull rod.

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