Patent Description:
The use of a circuit breaker can effectively improve a safety and a reliable operation of an electric device. In order to meet the installation needs of different electric devices, a miniature circuit breaker, as an important type of circuit breaker, has various structures and tends to be miniaturized as a whole. An existing miniature circuit breaker has the following problems.

According to an existing miniature circuit breaker, after the circuit breaker is switched on or off by an operating handle, the switching-off and switching-on states of the circuit breaker can be intuitively judged by a position of the operating handle, but after the circuit breaker is switched on or off by a button mechanism, the switching-off and switching-on states of the circuit breaker cannot be intuitively judged by a position of the button mechanism.

The present invention aims to overcome the defects in the prior art, and provides a miniature circuit breaker, and an indicating apparatus thereof may indicate a switching-on state of the circuit breaker when the circuit breaker is switched on, thus improving a safety of electricity consumption.

In order to achieve the above objective, the technical solutions used in the present invention are as follows.

A miniature circuit breaker, comprising a circuit breaker housing, a button mechanism, and an indicating apparatus, wherein the circuit breaker housing comprises an indicating hole arranged in one side thereof, the button mechanism is in sliding fit with the circuit breaker housing, the indicating apparatus is in driving fit with the button mechanism, and when the button mechanism is pressed to switch on the miniature circuit breaker, the button mechanism drives the indicating apparatus to shield the indicating hole.

The circuit breaker housing comprises at least one wire insertion hole and at least one wire removal hole which are arranged in one side thereof, the wire insertion hole is matched with the wire removal hole for use, the button mechanism, the wire removal hole, and the wire insertion hole are located at a same end of the circuit breaker housing, and when the button mechanism is pressed to switch on the miniature circuit breaker, the button mechanism drives the indicating apparatus to shield the wire removal hole, so as to use the wire removal hole as the indicating hole.

Preferably, the indicating apparatus comprises at least one baffle and a linkage, one end of the linkage is drivingly connected with the button mechanism, the other end of the linkage is in driving fit with the baffle, the baffle is in sliding fit with the circuit breaker housing, and when the button mechanism is pressed to switch on the miniature circuit breaker, the button mechanism drives the baffle to move to the wire removal hole through the linkage and shield the wire removal hole.

Preferably, further comprising an operating mechanism, a moving contact, and a static contact, wherein the button mechanism comprises a button body and a first connecting rod, two ends of the first connecting rod are respectively connected with the button body and the operating mechanism, and one end of the first connecting rod passes through the button body to be in driving fit with the linkage; and when the button mechanism is pressed, the button mechanism drives the operating mechanism to perform a switching-on operation through the first connecting rod, so that the moving contact is connected with the static contact, and meanwhile, the button mechanism drives the linkage through the first connecting rod, so that the linkage drives the baffle to move to the wire removal hole and shield the wire removal hole.

Preferably, the circuit breaker housing comprises a sliding cavity arranged inside the wire removal hole, and the baffle moves in the sliding cavity to shield the wire removal hole or leave the wire removal hole.

Preferably, a middle portion of the linkage is pivotally arranged on the circuit breaker housing, the linkage comprises a linkage driven arm, and a linkage driving arm, a middle portion of the linkage driven arm is provided with a linkage driven arm slot, the linkage driving arm is provided with a linkage driving column, and one end of the baffle which is in driving fit with the linkage is provided with a baffle driven end slot; and the button mechanism comprises a button driving column, the button driving column is drivingly connected with the linkage driven arm slot, and the linkage driving column is drivingly connected with the baffle driven end slot.

Preferably, the circuit break housing comprises two wire insertion holes and two wire removal holes which are arranged in one side thereof, and the two wire removal holes are correspondingly matched with the two wire insertion holes respectively; the indicating apparatus comprises a first baffle, a second baffle, a linkage, and a second transmission rod, the first baffle and the second baffle are correspondingly matched with the two wire removal holes respectively, one end of the first baffle is drivingly connected with the linkage, the other end of the first baffle is drivingly connected with one end of the second transmission rod, the other end of the second transmission rod is drivingly connected with the second baffle, and a middle portion of the second transmission rod is pivotally arranged on the circuit breaker housing; and the button mechanism is pressed to switch on the miniature circuit breaker, the button mechanism drives the first baffle to move to the wire removal hole through the linkage and shield the wire removal hole, and the first baffle drives the second baffle to move to the other wire removal hole through the second transmission rod and shield the wire removal hole.

Preferably, the circuit breaker housing further comprises a first sliding cavity and a second sliding cavity, the first sliding cavity is arranged on one side of one wire insertion hole and is close to the button mechanism, the first baffle is slidably arranged in the first sliding cavity, the second sliding cavity is arranged on one side of the other wire insertion hole and is far away from the button mechanism, the second baffle is slidably arranged in the second sliding cavity, the first sliding cavity is communicated with the second sliding cavity, the second transmission rod is rotatably arranged at a communication place between the first sliding cavity and the second sliding cavity, two ends of the second transmission rod are respectively located in the first sliding cavity and the second sliding cavity, and two ends of the second transmission rod are drivingly connected with the first baffle and the second baffle respectively.

Preferably, the first baffle comprises a first baffle driven end, a first baffle connecting arm, and a first baffle body, two ends of the first baffle connecting arm are respectively connected with the first baffle driven end and the first baffle body, one side of the first baffle driven end is provided with a first baffle driven end slot, the first baffle driven end slot is drivingly connected with the linkage, and a lower side of the first baffle body is provided with a first baffle body slot; the second baffle comprises a second baffle body and a second baffle body slot arranged on a lower side of the second baffle body; and the second transmission rod comprises a second transmission rod trunk, a second transmission rod driven end, and a second transmission rod driving end, the second transmission rod trunk is pivotally arranged on the circuit breaker housing, the second transmission rod driven end is drivingly connected with the first baffle body slot, and the second transmission rod driving end is drivingly connected with the second baffle body slot.

Preferably, further comprising an outlet end, wherein the outlet end comprises a conductive plate and an elastic member, the conductive plate is fixedly arranged on the circuit breaker housing, the elastic member comprises an elastic member fixed end and an elastic member wire pressing end, the elastic member fixed end is fixedly arranged on the circuit breaker housing, the elastic member wire pressing end is in elastic contact with the conductive plate, the elastic member wire pressing end is arranged corresponding to the wire insertion hole and the wire removal hole, an external wire passes through the wire insertion hole to be inserted between the elastic member wire pressing end and the conductive plate, a reset force of the elastic member wire pressing end presses the external wire between the elastic member wire pressing end and the conductive plate, and a pressure is applied to the elastic member wire pressing end through the wire removal hole to separate the elastic member wire pressing end from the external wire, which means that the external wire is pulled out of the wire insertion hole.

Preferably, the indicating apparatus further comprises an indicating apparatus reset member, and after the button mechanism is reset, the indicating apparatus resets under an action of the indicating apparatus reset member and leaves the indicating hole.

According to the miniature circuit breaker of the present invention, when the circuit breaker is switched on, the indicating apparatus may shield an indicating hole to indicate that the circuit breaker is in a switching-on state; and plays a warning role to a user, prompting the user not to disconnect and connect a wire, thus significantly improving the safety of electricity consumption. In addition, the circuit breaker housing further includes a wire removal hole arranged on one side thereof, the wire removal hole may be used as the indicating hole, when the circuit breaker is switched on, the indicating apparatus shields the wire removal hole, thus playing a role of indicating the switching-on state of the circuit breaker, without needing an additional structure, which is conductive to simplifying a structure of the miniature circuit breaker.

The specific implementations of a miniature circuit breaker of the present invention are further described hereinafter with reference to the embodiments shown in <FIG>. The miniature circuit breaker of the present invention is not limited to the descriptions in the following embodiments.

The miniature circuit breaker of the present invention includes a circuit breaker housing <NUM>, a button mechanism <NUM> arranged on the circuit breaker housing <NUM> and in sliding fit with the circuit breaker housing, and an operating mechanism <NUM>, a moving contact <NUM>, a static contact <NUM>, a short circuit protection mechanism <NUM>, an arc extinguishing mechanism <NUM>, and an overload protection mechanism <NUM> which are arranged in the circuit breaker housing <NUM>. The button mechanism <NUM> is drivingly connected with the operating mechanism <NUM> through the first connecting rod <NUM>, and the operating mechanism <NUM> is connected with the moving contact <NUM>. The short circuit protection mechanism <NUM> and the overload protection mechanism <NUM> are in driving fit with the operating mechanism <NUM> respectively to trigger releasing of the circuit breaker when corresponding faults occur, and the arc extinguishing mechanism <NUM> is matched with the moving contact <NUM> and the static contact <NUM> for use.

Preferably, the short circuit protection mechanism <NUM> includes an electromagnetic release, and the overload protection mechanism <NUM> includes a bimetallic strip and an adjusting screw.

Preferably, as shown in <FIG>, the button mechanism <NUM> is arranged at one end of the circuit breaker housing <NUM>, and the short circuit protection mechanism <NUM> and the arc extinguishing mechanism <NUM> are both arranged at the other end of the circuit breaker housing <NUM>. The operating mechanism <NUM> is arranged between the button mechanism <NUM> and the short circuit protection mechanism <NUM>, and the overload protection mechanism <NUM> is arranged on one side of the operating mechanism <NUM> and is located between the arc extinguishing mechanism <NUM> and the button mechanism <NUM>. Further, as shown in <FIG>, the miniature circuit breaker of the present invention further includes an outlet end <NUM> and an inlet end <NUM>. The outlet end <NUM> is arranged on one side of the button mechanism <NUM>, and the outlet end <NUM> and the button mechanism <NUM> are located at a same end of the circuit breaker housing <NUM>. The inlet end <NUM> is arranged on one side of the short circuit protection mechanism <NUM> and the arc extinguishing mechanism <NUM>, and the inlet end <NUM>, the short circuit protection mechanism <NUM>, and the arc extinguishing mechanism <NUM> are located at a same end of the circuit breaker housing <NUM>. The inlet end <NUM> is a plug-in wiring terminal. Specifically, in a direction shown in <FIG>, the button mechanism <NUM> and the outlet end <NUM> are located at an upper end of the circuit breaker housing <NUM>, and the outlet end <NUM> is located on a left side of the button operating mechanism <NUM>. The operating mechanism <NUM> and the overload protection mechanism <NUM> are located in a middle portion of the circuit breaker housing <NUM>, and the overload protection mechanism <NUM> is located on a left side of the operating mechanism <NUM>. The short circuit protection mechanism <NUM>, the arc extinguishing mechanism <NUM>, and the inlet end <NUM> are located at a lower end of the circuit breaker housing <NUM>, and the inlet end <NUM> is located on a lower side of the short circuit protection mechanism <NUM> and the arc extinguishing mechanism <NUM>. Thus it can be seen that, according to the miniature circuit breaker of the present invention, the circuit breaker housing <NUM> thereof is reasonably planned and distributed, which not only ensures reasonable layout and organic matching of various mechanisms or components, but also makes full use of a space of the circuit breaker housing <NUM>, thus being conductive to reducing an overall volume of the miniature circuit breaker, so as to adapt to a miniaturization development trend of electric devices and reduce installation space requirements of the circuit breaker. Moreover, the outlet end <NUM> and the button mechanism <NUM> are located at a same end of the circuit breaker housing <NUM>, which is convenient for a user to connect and disconnect wire for the circuit breaker. The inlet end <NUM> is the plug-in wiring terminal, which is convenient for connecting the circuit breaker with a main circuit. An installation cabinet for installing the circuit breaker does not need to be disassembled during inlet wiring and outlet wiring, thus significantly improving convenience of wiring, and being conducive to improving an operation safety.

Preferably, as shown in <FIG>, the miniature circuit breaker of the present invention further includes an anti-switching-on mechanism. The button mechanism <NUM> is arranged at one end of the circuit breaker housing <NUM> and is in sliding fit with the circuit breaker housing. The anti-switching-on mechanism includes a first locking member <NUM>, the first locking member <NUM> is pivotally arranged on the circuit breaker housing <NUM>, and one end of the first locking member <NUM> is in catch fit with the button mechanism <NUM> to prevent the button mechanism <NUM> from moving towards a switching-on direction. After the miniature circuit breaker is assembled to an assembly position of the circuit breaker and installed in place, a housing at the assembly position of the circuit breaker acts on the first locking member <NUM>, so that after the first locking member <NUM> is unlocked from the button mechanism <NUM>, the button mechanism <NUM> is capable of moving towards the switching-on direction for a switching-on operation. The anti-switching-on mechanism ensures that the miniature circuit breaker is capable of being switched on only after being installed in place, thus avoiding a situation that the circuit breaker cannot work normally due to poor contact caused by improper installation of the miniature circuit breaker, and avoiding a situation that the miniature circuit breaker is in false contact with the assembly position of the circuit breaker. When the switching-on operation is performed, an electric arc is generated, which causes ablation to the circuit breaker or the assembly position of the circuit breaker, thus affecting a service life, avoiding electric shock of a user when operating the circuit breaker, and being conductive to improving a safety of electricity consumption.

Preferably, as shown in <FIG>, the anti-switching-on mechanism further includes a first locking spring. The first locking member <NUM> includes a first locking member body <NUM>, and a first locking member protrusion <NUM> and a first locking member stop arm <NUM> which are respectively arranged at two ends of the first locking member body <NUM>. The first locking member body <NUM> is pivotally arranged on the circuit breaker housing <NUM>, the first locking member stop arm <NUM> is connected with the first locking member body <NUM> in a bent manner, and the circuit breaker housing <NUM> includes a first opening hole <NUM> arranged in one side thereof. The first locking spring is respectively connected with the first locking member <NUM> and the circuit breaker housing <NUM> to make the first locking member stop arm <NUM> in locking fit with the button mechanism <NUM>, and make the first locking member protrusion <NUM> pass through the first opening hole <NUM> and protrude outside the circuit breaker housing <NUM>. After the miniature circuit breaker is assembled to the assembly position of the circuit breaker and installed in place, the housing at the assembly position of the circuit breaker squeezes the first locking member protrusion <NUM> to move the first locking member protrusion into the circuit breaker housing <NUM>, so that the first locking member stop arm <NUM> is unlocked from the button mechanism <NUM>.

It should be pointed out that the locking fit between the button mechanism <NUM> and the first locking member stop arm <NUM> refers to that the button mechanism <NUM> cannot act towards the switching-on direction (the direction shown in <FIG>, the switching-on direction refers to a downward direction) after being locked, but after being unlocked, the button mechanism <NUM> may act towards the switching-on direction to switch off/on the miniature circuit breaker of the present invention.

Preferably, as shown in <FIG>, the miniature circuit breaker of the present invention further includes a locking mechanism. The locking mechanism includes a second locking member <NUM>. The button mechanism <NUM> is arranged at one end of the circuit breaker housing <NUM> and is in sliding fit with the circuit breaker housing. The circuit breaker housing <NUM> includes a second opening hole <NUM> arranged in one side thereof, and the second locking member <NUM> is pivotally arranged on the circuit breaker housing <NUM>. One end of the second locking member <NUM> is in driving fit with the button mechanism <NUM>, and the other end of the second locking member passes through the second opening hole <NUM> and is in limit fit with the housing at the assembly position of the circuit breaker. When pulling the button mechanism <NUM> toward the outside of the circuit breaker housing <NUM>, the button mechanism <NUM> drives the second locking member <NUM> to rotate, so that the second locking member <NUM> releases the limit coordination with the housing of the assembly position of the circuit breaker. According to the locking mechanism, one end of the second locking member <NUM> is in limit fit with the housing at the assembly position of the circuit breaker, which prevents the miniature circuit breaker of the present invention from being pulled out by mistake, ensures stable and reliable work of the circuit breaker, and avoids electric shock of a user who pulls out the circuit breaker by mistake when the circuit breaker is in a switching-on state, thus being conductive to improving a safety of electricity consumption.

Preferably, as shown in <FIG>, the locking mechanism further includes a second locking spring. The second locking member <NUM> includes a second locking member body <NUM>, and a second locking member protrusion <NUM> and a second locking member driving arm <NUM> which are respectively arranged at two ends of the second locking member body <NUM>. The second locking member body <NUM> is pivotally arranged on the circuit breaker housing <NUM>, and is connected with the second locking member driving arm <NUM> in a bent manner. The circuit breaker housing <NUM> includes a second opening hole <NUM> arranged in one side thereof. The second locking spring is respectively connected with the second locking member body <NUM> and the circuit breaker housing <NUM>, so that the second locking member protrusion <NUM> passes through the second opening hole <NUM> and protrudes outside the circuit breaker housing <NUM>. After the miniature circuit breaker is assembled to the assembly position of the circuit breaker, the second locking member protrusion <NUM> passes through the second opening hole <NUM> and is in limit fit with the housing at the assembly position of the circuit breaker. According to the locking mechanism, after the miniature circuit breaker of the present invention is installed at the assembly position of the circuit breaker, the second locking member protrusion <NUM> is in limit fit with the housing at the assembly position of the circuit breaker, which prevents the miniature circuit breaker of the present invention from being pulled out by mistake, ensures stable and reliable work of the circuit breaker, and avoids electric shock of a user who pulls out the circuit breaker by mistake when the circuit breaker is in a switching-on state, thus being conductive to improving a safety of electricity consumption.

Preferably, the installation cabinet for installing the circuit breaker may be arranged at the assembly position of the circuit breaker.

Preferably, as shown in <FIG> and <FIG>, the button mechanism <NUM> includes a button head <NUM>, a button body <NUM>, and a first connecting rod <NUM>. The button head <NUM> is arranged at one end of the button body <NUM> and protrudes outside the circuit breaker housing <NUM>, so that the user may conveniently operate the button mechanism <NUM>. One end of the first connecting rod <NUM> is inserted into the other end of the button body <NUM>, one end of the first locking member <NUM> is in locking fit with one end of the first connecting rod <NUM> inserted into the button body <NUM>, and the second locking member <NUM> is in driving fit with one end of the first connecting rod <NUM> inserted into the button body <NUM>. The first connecting rod <NUM> not only serves as a transmission element between the button mechanism <NUM> and the operating mechanism <NUM>, but also is matched with the first locking member <NUM> and the second locking member <NUM> respectively, which is conductive to simplifying a structure of the button mechanism <NUM>, and saves a production cost of the miniature circuit breaker of the present invention.

Preferably, the first locking member body <NUM> of the first locking member <NUM> and the second locking member body <NUM> of the second locking member <NUM> are both pivotally arranged on the circuit breaker housing <NUM> through a first pivot <NUM>, which is conductive to simplifying an assembly structure of the anti-switching-on mechanism and the locking mechanism, thus saving an assembly space inside the circuit breaker housing <NUM>, and being conductive to miniaturizing the miniature circuit breaker of the present invention.

Preferably, the first locking spring and the second locking spring are double torsion springs <NUM> with an integrated structure, which include double torsion spring first ends, double torsion spring second ends, and double torsion spring third ends. The double torsion spring first ends are connected with the first locking member body <NUM>, the double torsion spring second ends are connected with the second locking member body <NUM>, and the double torsion spring third ends are connected with the circuit breaker housing <NUM>. The double torsion springs <NUM> may be connected with the first locking member <NUM>, the second locking member <NUM>, and the circuit breaker housing <NUM> at the same time, which is conductive to further simplifying an assembly structure of the anti-switching-on mechanism and the locking mechanism, simplifying an assembly operation, and improving an assembly efficiency.

Preferably, as shown in <FIG> and <FIG>, the operating mechanism <NUM> includes a catch member <NUM>, a supporting member <NUM>, and a buckle member <NUM>. The supporting member <NUM> is pivotally arranged on the circuit breaker housing <NUM>, and the catch member <NUM> and the buckle member <NUM> are pivotally arranged on the supporting member <NUM> respectively. The button mechanism <NUM> is drivingly connected with the operating mechanism <NUM>, the catch member <NUM> is in catch fit with the buckle member <NUM>, and the buckle member <NUM> is in driving fit with the supporting member <NUM>. The supporting member <NUM> is connected with the moving contact <NUM>, and the supporting member <NUM> is connected with the moving contact.

The miniature circuit breaker of the present invention further includes a switching-off rod <NUM>. The switching-off rod <NUM> includes a switching-off rod connecting end and a switching-off rod driving end. The switching-off rod connecting end is connected with the button mechanism <NUM>, and the switching-off rod driving end is in driving fit with the buckle member <NUM>. When the miniature circuit breaker is in a switching-off state, the catch member <NUM> is incatch fit with the buckle member <NUM>, and the button mechanism <NUM> is pressed to drive the operating mechanism <NUM> to act. The operating mechanism <NUM> drives the moving contact <NUM> to be connected with the static contact <NUM>, the miniature circuit breaker enters the switching-on state, and meanwhile, the switching-off rod <NUM> slides to a position matched with the buckle member <NUM>. The button mechanism <NUM> is pressed again, a switching-off rod driving end drives the buckle member <NUM> to rotate, so that the buckle member <NUM> is unlocked from the catch member <NUM>. The operating mechanism <NUM> is released, the supporting member <NUM> drives the moving contact <NUM> to be disconnected from the static contact <NUM>, the miniature circuit breaker enters a switching-off state, and meanwhile, the switching-off rod <NUM> is reset to an initial position.

It should be pointed out that the catch fit between the catch member <NUM> and the buckle member <NUM> refers to that one end of the catch member <NUM> is in lap joint with the buckle member <NUM>, and limits an action of the buckle member <NUM>. Once a lap joint relationship between the catch member <NUM> and the buckle member <NUM> is broken, the action of the buckle member <NUM> is no longer limited by the catch member <NUM>.

According to an existing miniature circuit breaker, a button is pulled to switch off the circuit breaker, but the circuit breaker is often pulled out of the cabinet due to an excessively large force applied by the user by the pulling manner, so that an assembly stability of the circuit breaker is poor, and user experience is affected.

According to the miniature circuit breaker of the present invention, the circuit breaker may be switched off/on by pressing the button mechanism <NUM>. Compared with the prior art that the circuit breaker is switched off by pulling the button mechanism, the present invention is capable of avoiding a situation that the circuit breaker is pulled out of the cabinet due to an excessively large force applied by the user to pull the button mechanism, which is conducive to improving an assembly stability of the circuit breaker, and improving user experience.

It should be pointed out that according to the miniature circuit breaker of the present invention, when the miniature circuit breaker is in the switching-on state, the switching-off operation may also be implemented by pulling the button mechanism <NUM>, and the switching-off rod <NUM> may be pulled without affecting pulling of the button mechanism <NUM>. Further, the miniature circuit breaker of the present invention may not be provided with the switching-off rod <NUM>, and the first connecting rod <NUM> drives the operating mechanism <NUM> to rotate past a dead point for switching off by pulling the button mechanism <NUM>, thus disconnecting the moving contact <NUM> from the static contact <NUM>.

The miniature circuit breaker of the present invention further includes an indicating apparatus. The circuit breaker housing <NUM> includes an indicating hole arranged in one side thereof, the button mechanism <NUM> is in sliding fit with the circuit breaker housing <NUM>, and the indicating apparatus is in driving fit with the button mechanism <NUM>. When the button mechanism <NUM> is pressed to switch on the miniature circuit breaker, the button mechanism <NUM> drives the indicating apparatus to shield the indicating hole. According to the miniature circuit breaker of the present invention, when the circuit breaker is switched on, the indicating apparatus shields the indicating hole to indicate that the circuit breaker is in the switching-on state, and plays a warning role to a user, prompting the user not to disconnect and connect wire for the miniature circuit breaker, thus significantly improving the safety of electricity consumption.

As shown in <FIG>, the circuit breaker housing <NUM> includes at least one wire insertion hole <NUM> and at least one wire removal hole <NUM> arranged on one side thereof. the wire insertion hole <NUM> is matched with the wire removal hole <NUM> for use, and the button mechanism <NUM>, the wire removal hole <NUM>, and the wire insertion hole <NUM> are located at a same end of the circuit breaker housing <NUM>. The miniature circuit breaker of the present invention further includes the indicating apparatus, and the indicating apparatus includes at least one baffle and a linkage 7a. A middle portion of the linkage 7a is pivotally arranged on the circuit breaker housing <NUM>, one end of the linkage 7a is drivingly connected with the button mechanism <NUM>, and the other end of the linkage is in driving fit with the baffle. The button mechanism <NUM> is pressed to switch on the miniature circuit breaker, the button mechanism <NUM> drives the baffle to move to the wire removal hole <NUM> through the linkage 7a and shield the wire removal hole <NUM>. Further, the baffle is in sliding fit with the circuit breaker housing <NUM>.

Preferably, the middle portion of the linkage 7a is pivotally arranged on the circuit breaker housing <NUM>, and the linkage 7a includes a linkage driven arm 71a, and a linkage driving arm 70a. A middle portion of the linkage driven arm 71a is provided with a linkage driven arm slot 73a, and the linkage driving arm 70a is provided with a linkage driving column 72a. One end of the baffle which is in driving fit with the linkage 7a is provided with a baffle driven end slot. The button mechanism <NUM> includes a button driving column, the button driving column is drivingly connected with the linkage driven arm slot 73a, and the linkage driving column 72a is drivingly connected with the baffle driven end slot.

Preferably, the baffle is in sliding fit with the circuit breaker housing <NUM>.

According to the invention, the wire removal hole <NUM> is the indicating hole.

According to an existing miniature circuit breaker, when the circuit breaker is switched on and powered on, the wire removal hole is exposed, and a circuit inside the circuit breaker housing may still be contacted through the wire removal hole, so that the user is very likely to get electric shock due to a misoperation on the wire removal hole, thus having a great potential safety hazard.

According to the miniature circuit breaker of the present invention, when the circuit breaker is switched on, the baffle moves to the wire removal hole to shield the wire removal hole, which firstly plays a warning role to the user, prompting the user not to operate the wire removal hole, and secondly shields the wire removal hole, avoiding the user from operating the wire removal hole, thus significantly improving a safety of electricity consumption.

Preferably, as shown in <FIG> and <FIG>, the circuit breaker housing <NUM> has a cuboid structure, and the circuit breaker housing <NUM> includes a front end face and a rear end face which are oppositely arranged, a left side face and a right side face which are oppositely arranged, and an upper surface and a lower surface which are oppositely arranged. An inlet hole 21a is arranged in the rear end face, an operating member installation hole <NUM> and a wire insertion hole <NUM> are arranged in the front end face, and a plug-in wiring terminal is arranged in the inlet hole 21a. According to the miniature circuit breaker of the present invention, the wire insertion hole and the inlet hole are arranged in the front end face and the rear end face of the circuit breaker housing <NUM> respectively, and an external wire may be directly plugged with or pulled from the plug-in wiring terminal in the inlet hole, so that when the circuit breaker is installed and replaced, an excessively large disassembly and assembly space is not needed, and disassembly and assembly are convenient.

<FIG> shows an optimal embodiment of the miniature circuit breaker of the present invention.

In a direction shown in <FIG>, the miniature circuit breaker of the present invention includes a circuit breaker housing <NUM>, a button mechanism <NUM>, an anti-switching-on mechanism, a locking mechanism, an operating mechanism <NUM>, a short circuit protection mechanism <NUM>, an arc extinguishing mechanism <NUM>, an inlet end <NUM>, an overload protection mechanism <NUM>, a moving contact <NUM>, a static contact <NUM>, and an outlet end <NUM>. The button mechanism <NUM> is inserted into an upper end of the circuit breaker housing <NUM> and is in sliding fit with the circuit breaker housing <NUM>, the outlet end <NUM> is arranged at an upper end of the circuit breaker housing <NUM> and is located on a left side of the button mechanism <NUM>, and the short circuit protection mechanism <NUM>, the arc extinguishing mechanism <NUM>, and the inlet end <NUM> are arranged at a lower end of the circuit breaker housing <NUM>. The short circuit protection mechanism <NUM> and the arc extinguishing mechanism <NUM> are arranged on an upper side of the inlet end <NUM>, and the arc extinguishing mechanism <NUM> and the short-circuit protection mechanism <NUM> are arranged side by side. The operating mechanism <NUM> and the overload protection mechanism <NUM> are arranged in a middle portion of the circuit breaker housing <NUM>, the operating mechanism <NUM> is located between the short circuit protection mechanism <NUM> and the button mechanism <NUM>, and the overload protection mechanism <NUM> is located between the arc extinguishing mechanism <NUM> and the outlet end <NUM>. The button mechanism <NUM> is drivingly connected with the operating mechanism <NUM> through a first connecting rod <NUM>, the operating mechanism <NUM> is connected with the moving contact <NUM>, the overload protection mechanism <NUM> is connected with the static contact <NUM>, the arc extinguishing mechanism <NUM> is matched with the moving contact <NUM> and the static contact <NUM> for use, and the short circuit protection mechanism <NUM> and the overload protection mechanism <NUM> are in driving fit with the operating mechanism <NUM> respectively.

Preferably, as shown in <FIG>, the overload protection mechanism <NUM> includes a bimetallic strip and an adjusting screw. An upper end of the bimetallic strip is in driving fit with the buckle member <NUM> of the operating mechanism <NUM>, and a lower end of the bimetallic strip is fixedly arranged on the circuit breaker housing <NUM>. The adjusting screw is arranged on a left side of the lower end of the bimetallic strip, and a position of the bimetallic strip of the overload protection mechanism may be adjusted by screwing the adjusting screw, thus adjusting an overload current protection range of the miniature circuit breaker of the present invention.

As shown in <FIG>, the anti-switching-on mechanism includes a first locking member <NUM>. The first locking member <NUM> includes a first locking member body <NUM>, and a first locking member protrusion <NUM> and a first locking member stop arm <NUM> which are respectively arranged at two ends of the first locking member body <NUM>. In a direction shown in <FIG>, the first locking member <NUM> is pivotally arranged at an upper right corner of the circuit breaker housing <NUM> through a first pivot <NUM> and is located on a right side of the button mechanism <NUM>. Double torsion springs <NUM> are arranged above the first locking member <NUM>, and double torsion spring first ends and double torsion spring third ends of the double torsion springs <NUM> are respectively connected with the first locking member body <NUM> of the first locking member <NUM> and the circuit breaker housing <NUM>, so that the first locking member protrusion <NUM> passes through a first opening hole <NUM> of the circuit breaker housing <NUM> and protrudes outside the circuit breaker housing <NUM>. As shown in <FIG>, the button mechanism <NUM> includes a button head <NUM>, a button body <NUM>, and a first connecting rod <NUM>. The button head <NUM> is arranged at one end of the button body <NUM> and protrudes outside the circuit breaker housing <NUM>, so that the user may conveniently operate the button mechanism <NUM>. One end of the first connecting rod <NUM> is inserted into the other end of the button body <NUM> and forms a first transmission rod <NUM>, and the first locking member stop arm <NUM> is in locking fit with the first transmission rod <NUM>. Specifically, in a direction shown in <FIG>, the button head <NUM> is connected with a left end of the button body <NUM>, the first transmission rod <NUM> is arranged at a right end of the button body <NUM>, and the first locking member stop arm <NUM> is arranged on a right side of the first transmission rod <NUM>. When the button mechanism <NUM> is pressed, the first locking member stop arm <NUM> prevents the button mechanism <NUM> from moving to the right, which means that the button mechanism <NUM> is prevented from moving towards a switching-on direction. After the miniature circuit breaker of the present invention is assembled to an assembly position of the circuit breaker and installed in place, a housing at the assembly position of the circuit breaker squeezes the first locking member protrusion <NUM>, so that the first locking member protrusion <NUM> moves into the circuit breaker housing <NUM>, and then the first locking member stop arm <NUM> tilts up and no longer blocks the first transmission rod <NUM>. At the moment, the circuit breaker may be switched on by pressing the button mechanism <NUM>.

Preferably, as shown in <FIG>, the first locking member <NUM> includes a first locking spring limit protrusion <NUM> arranged on one side of the first locking member body <NUM>, and the first locking spring limit protrusion <NUM> is in limit fit with the double torsion spring first ends of the double torsion springs <NUM>. Specifically, in a direction shown in <FIG>, the first locking spring limit protrusion <NUM> is arranged on a rear side of the left end of the first locking member body <NUM>, and the double torsion spring first ends are located on a front side of the first locking spring limit protrusion <NUM> and are in limit fit with the first locking spring limit protrusion.

Preferably, as shown in <FIG>, the button mechanism <NUM> includes a transmission rod installation table <NUM>. The first connecting rod <NUM> is a U-shaped rod, and one end of the first connecting rod <NUM> is inserted into the transmission rod installation table <NUM> and forms a first transmission rod <NUM> protruding from one side of the installation table <NUM>. The first locking member stop arm <NUM> of the first locking member <NUM> is located on one side of the transmission rod installation table <NUM> and is in locking fit with the first transmission rod <NUM>, and the first locking member stop arm <NUM> blocks the first transmission rod <NUM> from moving in a switching-on direction. Specifically, in a direction shown in <FIG>, the transmission rod installation table <NUM> is arranged on an upper side of the right end of the button body <NUM>, and the left end of the first connecting rod <NUM> is inserted into the transmission rod installation table <NUM> and forms the first transmission rod <NUM> protruding from a front side of the transmission rod installation table <NUM>. The first locking member stop arm <NUM> is located on a right side of the first transmission rod <NUM> and is in locking fit with the first transmission rod. Further, in a direction shown in <FIG>, the button mechanism <NUM> further includes a first limit boss <NUM>, and the first limit boss <NUM> is spaced with the transmission rod installation table <NUM> and is located on a front side thereof. The first limit boss <NUM> is in contact fit with the circuit breaker housing <NUM>, so that the button mechanism <NUM> is kept stable when sliding in the circuit breaker housing <NUM>, thus avoiding shaking. Preferably, in a direction shown in <FIG>, the button mechanism <NUM> further includes a button protrusion <NUM>. The button protrusion <NUM> is arranged on an upper side of the button body <NUM> and is located on a front side of the transmission rod installation table <NUM>, and a rear end of the button protrusion <NUM> is connected with a front end of the transmission rod installation table <NUM>.

As shown in <FIG>, the locking mechanism includes a second locking member <NUM>. The second locking member <NUM> includes a second locking member body <NUM>, and a second locking member protrusion <NUM> and a second locking member driving arm <NUM> which are respectively arranged at two ends of the second locking member body <NUM>. In a direction shown in <FIG>, the locking mechanism is arranged at an upper right corner of the circuit breaker housing <NUM> and is located on a right side of the button mechanism <NUM>. The second locking member body <NUM> of the second locking member <NUM> is pivotally installed on the circuit breaker housing <NUM> through the first pivot <NUM>. As shown in <FIG>, the second locking member driving arm <NUM> of the second locking member <NUM> is in driving fit with the first transmission rod <NUM> of the first connecting rod <NUM>. Specifically, in a direction shown in <FIG>, the second locking member driving arm <NUM> is arranged on a left side of the first transmission rod <NUM>. After the miniature circuit breaker of the present invention is assembled to the assembly position of the circuit breaker and installed in place, the housing at the assembly position of the circuit breaker is in limit fit with the second locking member body <NUM>, so that the circuit breaker is reliably limited and assembled at the assembly position of the circuit breaker. When the button mechanism <NUM> is pulled out of the circuit breaker housing <NUM>, the button mechanism <NUM> is pulled to the left. The first transmission rod <NUM> drives the second locking member driving arm <NUM>, so that the second locking member driving arm <NUM> tilts up, and the second locking member protrusion <NUM> goes down and moves into the circuit breaker housing <NUM>, so that the second locking member protrusion <NUM> is released from the assembly position of the circuit breaker, and the user may disassemble the circuit breaker from the assembly position of the circuit breaker.

Preferably, as shown in <FIG>, the second locking member <NUM> includes a second locking spring limit protrusion <NUM> arranged on one side of the second locking member body <NUM>, and the double torsion spring second ends of the double torsion springs <NUM> are in limit fit with the second locking spring limit protrusion <NUM>. Specifically, in a direction shown in <FIG>, the second locking spring limit protrusion <NUM> is arranged on a rear side of the left end of the second locking member body <NUM>, and the double torsion spring second ends are arranged on a front side of the second locking spring limit protrusion <NUM> and are in limit fit with the second locking spring limit protrusion.

Preferably, in a direction shown in <FIG>, the double torsion springs <NUM> are installed on the circuit breaker housing <NUM> through a third installation shaft <NUM>, and the double torsion springs <NUM> include double torsion spring first ends, double torsion spring second ends, and double torsion spring third ends. The double torsion spring first ends and the double torsion spring second ends are arranged above the button body <NUM> and are substantially parallel to the button body <NUM>, and the double torsion spring third ends are arranged above the button body <NUM> and are substantially perpendicular to the button body. The double torsion spring third ends are also matched with the button protrusion <NUM> of the button mechanism <NUM>, and the double torsion spring third ends block the button protrusion <NUM> in a switching-off direction of the button mechanism <NUM>, thus limiting a position of the button mechanism <NUM> in the switching-off direction. Specifically, in a direction shown in <FIG>, the first installation shaft <NUM> is installed at an upper right corner of the circuit breaker housing <NUM>.

Preferably, as shown in <FIG>, the circuit breaker housing <NUM> further includes a third locking spring limit protrusion <NUM>, and the third locking spring limit protrusion <NUM> is connected with the double torsion spring third ends. Specifically, in a direction shown in <FIG>, the third locking spring limit protrusion <NUM> is arranged above the locking mechanism and the anti-switching-on mechanism, and is located on a left side of the first installation shaft <NUM>.

Preferably, as shown in <FIG>, the button mechanism <NUM> is arranged at one end of the circuit breaker housing <NUM> and is in sliding fit with the circuit breaker housing. The third locking spring limit protrusion <NUM>, the first installation shaft <NUM>, the first locking member <NUM>, the second locking member <NUM>, and the double torsion springs <NUM> are all arranged on one side of the button mechanism <NUM>. The first installation shaft <NUM> is arranged at an inner corner of the circuit breaker housing <NUM>, the third locking spring limit protrusion <NUM> is located between the first installation shaft <NUM> and the button mechanism <NUM>, and the first locking member <NUM> and the second locking member <NUM> are arranged side by side and are located on one side of the third locking spring limit protrusion <NUM>. A first opening hole <NUM> is closer to the first installation shaft <NUM> than a second opening hole <NUM>, and the first pivot <NUM> is located between the first opening hole <NUM> and the first installation shaft <NUM>. Specifically, in a direction shown in <FIG>, the button mechanism <NUM> is arranged at an upper end of the circuit breaker housing <NUM> and is in sliding fit with the circuit breaker housing. The anti-switching-on mechanism, the locking mechanism, and the double torsion springs are all arranged on a right side of the button mechanism <NUM>. The first installation shaft <NUM> is arranged at an upper right corner of the circuit breaker housing <NUM>, and the double torsion springs <NUM> are sleeved on the first installation shaft <NUM>. The anti-switching-on mechanism and the locking mechanism are both pivotally arranged on the circuit breaker housing <NUM> through the first pivot <NUM>, and are located below the first installation shaft <NUM>. The first locking member <NUM> of the anti-switching-on mechanism and the second locking member <NUM> of the locking mechanism are arranged side by side, the second locking member <NUM> is located on an inner side, and the first locking member <NUM> is located on an outer side. The first opening hole <NUM> is located above the second opening hole <NUM>, and the third locking spring limit protrusion <NUM> is arranged on a left side of the first installation shaft <NUM>.

As shown in <FIG>, <FIG>, and <FIG>, the operating mechanism <NUM> includes a transmission member <NUM>, a second connecting rod <NUM>, a catch member <NUM>, a supporting member <NUM>, a buckle member <NUM>, and a first reset spring <NUM>. The transmission member <NUM> is pivotally arranged on the circuit breaker housing <NUM> through a second pivot <NUM>, the supporting member <NUM> is pivotally arranged on the circuit breaker housing <NUM> through a third pivot <NUM>, the catch member <NUM> is pivotally arranged on the supporting member <NUM> through a fourth pivot <NUM>, and the buckle member <NUM> is pivotally arranged on the supporting member <NUM> through the third pivot <NUM>. The button mechanism <NUM> is drivingly connected with the transmission member <NUM> through the first connecting rod <NUM>, the transmission member <NUM> is drivingly connected with the catch member <NUM> through the second connecting rod <NUM>, the catch member <NUM> is in catch fit with the buckle member <NUM>, and the buckle member <NUM> is in driving fit with the supporting member <NUM>. The supporting member <NUM> is connected with the moving contact <NUM>.

It should be pointed out that, in addition to locking and preventing the circuit breaker from being switched on when the circuit breaker is not assembled in place by the locking fit between the first locking member <NUM> and the button mechanism <NUM>, the anti-switching-on mechanism may also be in locking fit with the operating mechanism <NUM> (not shown in the drawings) to prevent the operating mechanism <NUM> from being operated to switch on. Specifically, when the circuit breaker is not assembled in place, one end of the first locking member <NUM> of the anti-switching-on mechanism may resist locking with the supporting member <NUM> of the operating mechanism <NUM>. After the circuit breaker is assembled in place, the housing at the assembly position of the circuit breaker triggers the first locking member <NUM> to rotate, so that the first locking member <NUM> contacts and is in locking fit with the supporting member <NUM> of the operating mechanism <NUM>. Therefore, the button mechanism <NUM> is capable of moving in the switching-on direction, and drives the operating mechanism <NUM> to act so as to perform a switching-on operation.

The operating mechanism <NUM> further includes a switching-off rod <NUM>, a button mechanism reset member 10a, a guide boss <NUM>, and a guide groove set. The switching-off rod <NUM> includes a switching-off rod connecting end and a switching-off rod driving end. The switching-off rod connecting end is connected with the button mechanism <NUM>, and the switching-off rod driving end is in driving fit with the buckle member <NUM>. The guide boss <NUM> is arranged on the circuit breaker housing <NUM>. As shown in <FIG> and <FIG>, the guide groove set includes a first guide groove <NUM>, a second guide groove <NUM>, a third guide groove <NUM>, a fourth guide groove <NUM>, and a fifth guide groove <NUM>. The first guide groove <NUM>, the second guide groove <NUM>, the third guide groove <NUM>, the fourth guide groove <NUM>, and the fifth guide groove <NUM> are connected end to end to form the annular guide groove set surrounding the guide boss <NUM>. When the miniature circuit breaker is in the switching-off state, the button mechanism <NUM> is pressed, the switching-off rod driving end of the switching-off rod <NUM> passes through the first guide groove <NUM> and then the second guide groove <NUM> to enter the third guide groove <NUM>, and the miniature circuit breaker enters the switching-on state. The button mechanism <NUM> is released, under a counterforce of the button mechanism reset member 10a, the button mechanism <NUM> drives the switching-off rod driving end to pass through the third guiding groove <NUM> to enter the fourth guiding groove <NUM>. At the moment, a front end of the switching-off rod driving end is aligned with the buckle member <NUM>, and the guide boss <NUM> blocks the switching-off rod <NUM> in a reset direction of the switching-off rod <NUM> to prevent the switching-off rod <NUM> and the button mechanism <NUM> from resetting under the counterforce of the button mechanism reset member 10a. The button mechanism <NUM> is pressed again, the switching-off rod driving end drives the buckle member <NUM> to rotate, the buckle member <NUM> is unlocked from the catch member <NUM>, the operating mechanism <NUM> is buckled, the operating mechanism <NUM> drives the button mechanism <NUM> to reset, and the button mechanism <NUM> drives the switching-off driving end to pass through the fourth guide groove <NUM> and then the fifth guide groove <NUM> to enter the first guide groove <NUM>. The button mechanism <NUM> and the operating mechanism <NUM> are both restored to an initial state, so that the miniature circuit breaker enters the switching-off state.

<FIG> shows of a trajectory of the switching-off rod driving end of the switching-off rod <NUM>: when the miniature circuit breaker of the present invention is changed from the switching-off state to the switching-on state, a broken line a-b-c-d basically describes the trajectory of the switching-off rod driving end; and when the miniature circuit breaker of the present invention is changed from the switching-on state to the switching-off state, a broken line d-e-a basically describes the trajectory of the switching-off rod driving end.

Preferably, as shown in <FIG>, the first guide groove <NUM> includes a first guide groove bottom surface, the second guide groove <NUM> includes a second guide groove bottom surface, the third guide groove <NUM> includes a third guide groove bottom surface, the fourth guide groove <NUM> includes a fourth guide groove bottom surface, and the fifth guide groove <NUM> includes a fifth guide groove bottom surface. The second guide groove bottom surface is an inclined plane, one end of the second guide groove bottom surface connected with the first guide groove bottom surface is flush with the first guide groove bottom surface, one end of the second guide groove bottom surface connected with the third guide groove <NUM> is higher than the first guide groove bottom surface, and is higher than the third guide groove bottom surface, the fourth guide groove bottom surface is lower than the third guide groove bottom surface, the fifth guide groove bottom surface is an inclined plane, one end of the fifth guide groove bottom surface connected with the fourth guide groove bottom surface is flush with the fourth guide groove bottom surface, and one end of the fifth guide groove bottom surface connected with the first guide groove is higher than the fourth guide groove bottom surface, and is higher than the first guide groove bottom surface.

Preferably, a step structure is arranged at a joint between the second guide groove bottom surface and the third guide groove bottom surface, a step structure is arranged at a joint between the third guide groove bottom surface and the fourth guide groove bottom surface, and a step structure is arranged at a joint between the fifth guide groove bottom surface and the first guide groove bottom surface.

Preferably, the guide boss <NUM> is a boss with a triangular cross section. Further, a cross section of the guide boss <NUM> is a right triangle or an obtuse triangle, the right angle or the obtuse angle thereof is located at a joint between the fourth guide groove <NUM> and the fifth guide groove <NUM>, one acute angle thereof is located at a joint between the second guide groove <NUM> and the third guide groove <NUM>, the other acute angle thereof corresponds to a joint between the first guide groove <NUM> and the second guide groove <NUM>, one right angle side or one obtuse angle side thereof is arranged on one side of the fourth guide groove <NUM> and is parallel to the fourth guide groove, the other right angle side or the other obtuse angle side thereof is arranged on one side of the fifth guide groove <NUM> and is parallel to the fifth guide groove, a hypotenuse or a longest side thereof is arranged on one side of the second guide groove <NUM>, the first guide groove <NUM> and the second guide groove <NUM> are located on a straight line, and the third guide groove <NUM> is located on a lower side of the guide boss <NUM>.

It should be pointed out that in addition to using a specific structure that the guide boss is matched with the guide groove set in the embodiment, the switching-off rod may also use other matching structures, and only the button mechanism <NUM> needs to be matched. The button mechanism is pressed for the first time to move the switching-off rod to a second stable position matched with the buckle member, and the button mechanism is pressed for the second time to reset to an initial stable position and drive the buckle member. The structures all belong to the scope of protection of the present invention. For example, a guide structure may be arranged on the button mechanism, and a guide rod matched with the guide structure is arranged on the circuit breaker housing <NUM>.

Preferably, as shown in <FIG>, <FIG>, <FIG>, <FIG>, and <FIG>, the transmission member <NUM> includes a first transmission member connecting hole and a second transmission member connecting hole thereon, the first transmission member connecting hole is connected with the first connecting rod <NUM>, and an inner diameter of the first transmission member connecting hole is larger than an outer diameter of the first connecting rod <NUM>, so that when the miniature circuit breaker of the present invention is in the switching-on state, the button mechanism <NUM> has a certain degree of freedom of movement relative to the transmission member <NUM>, and the second transmission member connecting hole is connected with the second connecting rod <NUM>.

Preferably, as shown in <FIG>, the buckle member <NUM> includes a buckle member first arm <NUM> and a buckle member second arm <NUM>. A free end of the buckle member first arm <NUM> is in catch fit with the catch member <NUM>, the buckle member second arm <NUM> is in driving fit with the switching-off rod driving end of the switching-off rod <NUM>, and the buckle member second arm <NUM> is also in driving fit with the overload protection mechanism <NUM>. Further, the buckle member <NUM> further includes a buckle member extension <NUM>. One end of the buckle member extension <NUM> is connected with the buckle member second arm <NUM>, and the other end of the buckle member extension is in driving fit with the switching-off rod driving end of the switching-off rod <NUM>. The buckle member extension <NUM> is also in driving fit with the overload protection mechanism <NUM>.

Preferably, as shown in <FIG>, the buckle member <NUM> has a generally inverted T-shaped structure, which includes the buckle member first arm <NUM>, the buckle member second arm <NUM>, a buckle member third arm <NUM>, and the buckle member extension <NUM>. The buckle member third arm <NUM> is in driving fit with the short circuit protection mechanism <NUM>. Specifically, in a direction shown in <FIG>, the buckle member <NUM> has a generally inverted T-shaped structure, and a middle portion thereof is pivotally installed on the supporting member <NUM> through the third pivot <NUM>. The buckle member second arm <NUM> and the buckle member third arm <NUM> are basically located in a straight line, and the buckle member first arm <NUM> is located between the buckle member second arm <NUM> and the buckle member third arm <NUM>, and is approximately perpendicular to the straight line where the buckle member first arm and the buckle member second arm are located. A width of one end of the buckle member extension <NUM> matched with the switching-off rod driving end is greater than or equal to a width of the fourth guide groove <NUM> of the guide groove set, so as to ensure reliable matching between the switching-off rod driving end and the buckle member extension <NUM>.

Preferably, as shown in <FIG>, the button mechanism reset member 10a is an elastic metal member, one end of the button mechanism reset member is fixedly connected with the circuit breaker housing <NUM> and is located on one side of the transmission member <NUM>, the other end of the button mechanism reset member extends towards the button mechanism <NUM> and is in driving fit with the button mechanism <NUM>. When the miniature circuit breaker is in the switching-off state, the button mechanism <NUM> is separated from the button mechanism reset member 10a. When the miniature circuit breaker is in the switching-on state, the button mechanism <NUM> contacts with the button mechanism reset member 10a, and the button mechanism reset member 10a provides a counterforce in a reset direction for the button mechanism <NUM>. It should be pointed out that when the miniature circuit breaker is in the switching-off state, the button mechanism <NUM> may also contact with the button mechanism reset member 10a.

Preferably, the button mechanism reset member 10a is specifically a torsion spring or a bent metal rod/strip, one end of the button mechanism reset member is fixed on the circuit breaker housing <NUM>, and the other end of the button mechanism reset member is matched with the button mechanism <NUM>. It can be understood that in other implementations, the button mechanism reset member 10a may also be a compression spring arranged between the circuit breaker housing <NUM> and the button mechanism <NUM>, which provides a counterforce for the button mechanism <NUM>.

As shown in <FIG>, the circuit breaker housing <NUM> includes two wire insertion holes <NUM> and two wire removal holes <NUM> arranged on one side thereof. The two wire removal holes <NUM> are correspondingly matched with the two wire insertion holes <NUM> respectively. One wire removal hole <NUM> and one wire insertion hole <NUM> are a set, and each set of wire insertion hole <NUM> and wire removal hole <NUM> are both arranged corresponding to one outlet end <NUM>. An external wire may pass through the wire insertion hole <NUM> to be connected with the outlet end <NUM>, and the user may operate the outlet end <NUM> through the wire removal hole <NUM>, thus pulling the external wire out of the wire insertion hole <NUM>.

As shown in <FIG>, the miniature circuit breaker of the present invention further includes an indicating apparatus. The indicating apparatus includes a first baffle 5a, a second baffle 6a, a linkage 7a, and a second transmission rod 8a. The first baffle 5a and the second baffle 6a are correspondingly matched with the two wire removal holes <NUM> respectively, one end of the first baffle 5a is drivingly connected with the linkage 7a, the other end of the first baffle is drivingly connected with one end of the second transmission rod 8a, the other end of the second transmission rod 8a is drivingly connected with the second baffle 6a, and a middle portion of the second transmission rod 8a is pivotally arranged on the circuit breaker housing <NUM>. The button mechanism <NUM> is pressed to switch on the miniature circuit breaker, the button mechanism <NUM> drives the first baffle 5a to move to the wire removal hole <NUM> and shield the wire removal hole <NUM> through the linkage 7a, and the first baffle 5a drives the second baffle 6a to move to the other wire removal hole <NUM> and shield the wire removal hole <NUM> through the second transmission rod 8a. Specifically, as shown in <FIG> and <FIG>, the wire insertion hole <NUM> close to the button mechanism <NUM> is a first wire insertion hole, and the wire insertion hole <NUM> far away from the button mechanism <NUM> is a second wire insertion hole. The wire removal hole <NUM> matched with the first wire insertion hole is a first wire removal hole, and the wire removal hole <NUM> matched with the second wire insertion hole is a second wire removal hole. The first baffle 5a is matched with the second wire removal hole, and the second baffle 6a is matched with the first wire removal hole. A middle portion of the second transmission rod 8a is pivotally arranged on the circuit breaker housing <NUM>, the button mechanism <NUM> is pressed, the button mechanism <NUM> drives the linkage 7a to rotate, and the linkage 7a drives the first baffle 5a to move to the second wire removal hole and shield the second wire removal hole. The first baffle 5a drives the second transmission rod 8a to rotate, and the second transmission rod 8a drives the second baffle 6a to move to the first wire removal hole and shield the first wire removal hole.

Preferably, the first baffle 5a is arranged between the second wire removal hole and one outlet end <NUM>, and the second baffle 6a is arranged between the second wire removal hole and the other outlet end <NUM>. Further, the two outlet ends <NUM> are arranged corresponding to two poles of the miniature circuit breaker of the present invention respectively.

As shown in <FIG>, the circuit breaker housing <NUM> further includes a first sliding cavity <NUM> and a second sliding cavity <NUM>. The first sliding cavity <NUM> is arranged on one side of one wire insertion hole <NUM> and is close to the button mechanism <NUM>, the first baffle plate 5a is slidably arranged in the first sliding cavity <NUM>, the second sliding cavity <NUM> is arranged on one side of the other wire insertion hole <NUM> and is far away from the button mechanism <NUM>, and the second baffle 6a is slidably arranged in the second sliding cavity <NUM>. The first sliding cavity <NUM> is communicated with the second sliding cavity <NUM>, the second transmission rod <NUM> is rotatably arranged at a communication place between the first sliding cavity <NUM> and the second sliding cavity <NUM>, two ends of the second transmission rod 8a are respectively located in the first sliding cavity <NUM> and the second sliding cavity 6a, and two ends of the second transmission rod 8a are drivingly connected with the first baffle 5a and the second baffle 6a respectively. Specifically, as shown in <FIG>, the first sliding cavity <NUM> is arranged on one side of the second wire removal hole and is close to the button mechanism <NUM>, and the second sliding cavity <NUM> is arranged on one side of the first wire removal hole and is far away from the button mechanism <NUM>. The first sliding cavity <NUM> is communicated with the second sliding cavity <NUM>, the second transmission rod 8a is rotatably arranged at a communication place between the first sliding cavity <NUM> and the second sliding cavity <NUM>, and the second transmission rod 8a is located between the first wire insertion hole and the second wire insertion hole. The first baffle 5a is slidably arranged in the first sliding cavity <NUM>, one end of the first baffle 5a is drivingly connected with the linkage 7a, the other end of the first baffle is drivingly connected with one end of the second transmission rod 8a, and the other end of the second transmission rod 8a is drivingly connected with the second baffle 6a. The second baffle 6a is slidably arranged in the second sliding cavity <NUM>, one outlet end <NUM> matched with the first wire insertion hole and the first wire removal hole is arranged below the first wire insertion hole and the first wire removal hole, and one outlet end <NUM> matched with the second wire insertion hole and the second wire removal hole is arranged below the second wire insertion hole and the second wire removal hole. The first baffle 5a is arranged between the first wire removal hole and the outlet end <NUM> corresponding to the first wire removal hole, and the second baffle 6a is arranged between the second wire removal hole and the outlet end <NUM> corresponding to the second wire removal hole.

As shown in <FIG> and <FIG>, the first baffle 5a includes a first baffle driven end 52a, a first baffle connecting arm 51a, and a first baffle body 50a. Two ends of the first baffle connecting arm 51a are respectively connected with the first baffle driven end 52a and the first baffle body 50a, one side of the first baffle driven end 52a is provided with a first baffle driven end slot 53a, the first baffle driven end slot 53a is drivingly connected with the linkage 7a, and a lower side of the first baffle body 50a is provided with a first baffle body slot 54a. The second baffle 6a includes a second baffle body 60a and a second baffle body slot 61a arranged on a lower side of the second baffle body 60a. The second transmission rod 8a includes a second transmission rod trunk 80a, a second transmission rod driven end 82a, and a second transmission rod driving end 81a, the second transmission rod trunk 80a is pivotally arranged on the circuit breaker housing <NUM>, the second transmission rod driven end 82a is drivingly connected with the first baffle body slot 54a, and the second transmission rod driving end 80a is drivingly connected with the second baffle body slot 61a.

Preferably, the second transmission rod driven end 82a and the second transmission rod driving end 81a both have a cylindrical structure, and are both perpendicularly connected with the second transmission rod trunk 80a.

Preferably, the first baffle driven end 52a and the first baffle body 50a are perpendicularly connected with the first baffle connecting arm 51a respectively. Further, an extending direction of the first baffle driven end slot 53a is perpendicular to an extending direction of the first baffle connecting arm 51a, an extending direction of the first baffle body slot 54a is perpendicular to the extending direction of the first baffle connecting arm 51a, and the extending direction of the first baffle driven end slot 53a is perpendicular to the extending direction of the first baffle body slot 54a. Specifically, in a direction shown in <FIG>, the first baffle driven end slot 53a extends vertically, and the first baffle body slot 54a extends horizontally. The extending direction of the first baffle driven end slot 53a is perpendicular to the extending direction of the first baffle body slot 54a.

Preferably, a middle portion of the second transmission rod trunk 80a is provided with a second transmission rod pivot 83a, a second transmission rod pivot hole <NUM> is arranged in a communication place between the first sliding cavity <NUM> and the second sliding cavity <NUM> of the circuit breaker housing <NUM>, and the second transmission rod pivot 83a is rotatably arranged in the second transmission rod pivot hole <NUM>.

<FIG> and <FIG> show an embodiment of the linkage 7a of the present invention.

The linkage 7a has a V-shaped structure, a middle portion thereof is arranged on the circuit breaker housing 2a, and the linkage 7a includes a linkage driven arm 71a and a linkage driving arm 70a. A middle portion of the linkage driven arm 71a is provided with a linkage driven arm slot 73a, and the linkage driving arm 70a is provided with a linkage driving column 72a. The button mechanism <NUM> includes a button driving column, the button driving column is drivingly connected with the linkage driven arm slot 73a, and the linkage driving column 72a is drivingly connected with the first baffle driven end slot 53a.

It should be pointed out that, as shown in <FIG> and <FIG>, the button mechanism <NUM> may not be separately provided with the button driving column, and the first connecting rod <NUM> passes through the transmission rod installation table <NUM> of the button mechanism <NUM> and is drivingly connected with the linkage 7a. The above connecting manner is conductive to simplifying a structure of the button mechanism <NUM>, thus reducing a production cost.

In a direction shown in <FIG>, the button mechanism <NUM> is pressed, and the button mechanism <NUM> makes the linkage 7a rotate clockwise through the button driving column or the first connecting rod <NUM>. When the button mechanism <NUM> is reset, the button mechanism <NUM> drives the linkage 7a to rotate counterclockwise through the button driving column or the first connecting rod <NUM> to restore an initial state of the linkage 7a.

<FIG> and <FIG> show another embodiment of the linkage 7a of the present invention.

The linkage 7a has a V-shaped structure, a middle portion thereof is arranged on the circuit breaker housing 2a, and the linkage 7a includes a linkage driven arm 71a and a linkage driving arm 70a. The linkage driven arm 71a is in contact connection with the button driving column of the button mechanism <NUM> or in contact connection with one end of the first connecting rod <NUM>. The linkage driving arm 70a is provided with a linkage driving column 72a, and the linkage driving column 72a is drivingly connected with the first baffle driven end slot 53a. Specifically, one end of the button driving column or the first connecting rod <NUM> is arranged on an upper side of the linkage driven arm 71a and is drivingly connected with the linkage driven arm.

The indicating apparatus further includes an indicating apparatus reset member 9a, and the indicating apparatus is reset under an action of the indicating apparatus reset member 9a, thus avoiding the wire removal hole <NUM>. Preferably, the indicating apparatus reset member 9a is a reset spring, one end of the indicating apparatus reset member is connected with the circuit breaker housing <NUM>, and the other end of the indicating apparatus reset member is connected with the linkage driven arm 71a of the linkage 7a or the first baffle 5a.

As shown in <FIG> and <FIG>, the button mechanism <NUM> is pressed, and the button mechanism <NUM> makes the linkage 7a rotate clockwise through the button driving column or the first connecting rod <NUM>. When the button mechanism <NUM> is reset, the reset spring makes the linkage 7a rotate counterclockwise to restore an initial state of the linkage 7a.

It should be pointed out that an indicating hole (not shown in the drawings) may also be separately arranged in one side of the circuit breaker housing <NUM>, so that the indicating apparatus is matched with the indicating hole to indicate the switching-on state or switching-off state of the circuit breaker. The indicating apparatus is in linkage fit with the button mechanism. When the button mechanism is pressed to switch on the miniature circuit breaker, the indicating apparatus moves to the indicating hole and shields the indicating hole, and after the button mechanism is reset, the indicating apparatus leaves the indicating hole. In the embodiment, the wire removal hole <NUM> is used as the indicating hole, the wire removal hole may be effectively used, and the wire removal hole may be shielded by the indicating apparatus to prevent the wire removal hole from being operated when the circuit breaker is in the switching-on state.

As shown in <FIG>, the outlet end <NUM> includes a conductive plate <NUM> and an elastic member <NUM>. The conductive plate <NUM> is fixedly arranged on the circuit breaker housing <NUM>, the elastic member <NUM> includes an elastic member fixed end <NUM> and an elastic member wire pressing end <NUM>, the elastic member fixed end <NUM> is fixedly arranged on the circuit breaker housing <NUM>, the elastic member wire pressing end <NUM> is in elastic contact with the conductive plate <NUM>, and the elastic member wire pressing end <NUM> is arranged corresponding to a set of wire insertion hole <NUM> and wire removal hole <NUM>. An external wire passes through the wire insertion hole <NUM> to be inserted between the elastic member wire pressing end <NUM> and the conductive plate <NUM>, a reset force of the elastic member wire pressing end <NUM> presses the external wire between the elastic member wire pressing end <NUM> and the conductive plate <NUM>, and a pressure is applied to the elastic member wire pressing end <NUM> through the wire removal hole <NUM> to separate the elastic member wire pressing end from the external wire, which means that the external wire is pulled out of the wire insertion hole <NUM>. Preferably, as shown in <FIG>, the circuit breaker housing <NUM> further includes an elastic member fixing column <NUM> arranged thereon, an arc-shaped elastic member installation groove is formed between the elastic member fixing column <NUM> and the circuit breaker housing <NUM>, and the elastic member fixed end <NUM> is connected with the elastic member wire pressing end <NUM> through an arc-shaped bending structure <NUM>. The arc-shaped bending structure <NUM> is arranged in the elastic member installation groove. Further, as shown in <FIG>, an upper end of the conductive plate <NUM> is provided with an elastic member limit protrusion, and the elastic member limit protrusion is in limit fit with the elastic wire pressing end <NUM>. Specifically, as shown in <FIG> and <FIG>, a left side of the button mechanism <NUM> is provided with an outlet end wiring cavity, and an upper end of the outlet end wiring cavity is provided with the wire insertion hole <NUM> and the wire removal hole <NUM>. The conductive plate <NUM> is fixedly arranged at a lower right corner of the outlet end wiring cavity, the elastic member fixing column <NUM> is arranged at an upper left corner of the outlet end wiring cavity, and the arc-shaped elastic member installation groove is formed between the elastic member fixing column <NUM> and the circuit breaker housing <NUM>. The arc-shaped bending structure <NUM> of the elastic member <NUM> is arranged in the elastic member installation groove, a lower end of the elastic member fixed end <NUM> is in elastic contact with the circuit breaker housing <NUM>, and a right end of the elastic member wire pressing end <NUM> is in elastic contact with the conductive plate <NUM> and is in limit fit with the elastic member limit protrusion.

<FIG> and <FIG> show an embodiment of the circuit breaker housing <NUM> of the present invention.

In a direction shown in <FIG>, the circuit breaker housing <NUM> of the present invention has a cuboid structure approximately. The circuit breaker housing <NUM> includes a front end face and a rear end face which are oppositely arranged, a left side face and a right side face which are oppositely arranged, and an upper surface and a lower surface which are oppositely arranged. The circuit breaker housing <NUM> includes a wire insertion hole <NUM>, a wire removal hole <NUM>, an operating member installation hole <NUM>, a first opening hole <NUM>, a second opening hole <NUM>, an inlet hole 21a, and a signal wire connecting hole 22a. The operating member installation hole <NUM> is arranged at an upper end of the front end face of the circuit breaker housing <NUM> for installing the operating member. Two wire insertion holes <NUM> and two wire removal holes <NUM> are arranged on the front end face of the circuit breaker housing <NUM> and are located below the operating member installation hole <NUM>. The wire insertion hole <NUM> on the left side and the wire removal hole <NUM> on the left side are a set, and are matched with one outlet end <NUM> for used. The wire insertion hole <NUM> on the right side and the wire removal hole <NUM> on the right set are a set, and are matched with the other outlet end <NUM> for use. The first opening hole <NUM> is matched with the first locking member <NUM> of the anti-switching-on mechanism for making the first locking member protrusion <NUM> of the first locking member <NUM> pass through the first opening hole <NUM> and protrude from an upper side of the circuit breaker housing <NUM>. The second opening hole <NUM> is matched with the second locking member <NUM> of the locking mechanism for making the second locking member protrusion <NUM> of the second locking member <NUM> pass through the second opening hole <NUM> and protrude from an upper side of the circuit breaker housing <NUM>, which is in limited fit with the housing at the assembly position of the circuit breaker. Two inlet holes 21a are respectively arranged in the rear end face of the circuit breaker housing <NUM>, the two inlet holes 21a are spaced up and down and are respectively located at upper and lower ends of the rear end face, and the signal wire connecting hole 22a is arranged between the two inlet holes 21a. A plug-in wiring terminal is arranged in the inlet hole 21a, which is specifically the inlet end <NUM> to facilitate plug-in matching with the external wire when the circuit breaker is assembled to the assembly position of the circuit breaker. It should be pointed out that the inlet end <NUM> may also be located on one side of the front end face, and the outlet end <NUM> is arranged on one side of the rear end face.

It should be pointed out that one-pole circuit breaker corresponds to one inlet end and one outlet end. In the embodiment, two-pole circuit breakers are provided, including an L-pole circuit breaker and an N-pole circuit breaker. N-pole circuit breakers have no moving contact and static contact, and directly connect inlet ends and outlet ends of the corresponding N-pole circuit breakers by a conductor.

As shown in <FIG>, an adjusting screw installation hole <NUM> is arranged in a lower surface of the circuit breaker housing <NUM>, and the adjusting screw is assembled on the circuit breaker housing <NUM> through the adjusting screw installation hole <NUM> and contacts with a bimetallic strip of the overload protection mechanism <NUM> for adjusting a position of the bimetallic strip.

Preferably, as shown in <FIG>, an installation guide positioning step <NUM> is arranged on the left side face and/or the right side face, and the installation guide positioning step <NUM> protrudes from the left side face and/or the right side face. In a process of assembling the miniature circuit breaker to the assembly position of the circuit breaker and installing the miniature circuit breaker in plate, the installation guide positioning step <NUM> is matched with the housing at the assembly position of the circuit breaker for guiding, so as to prevent the miniature circuit breaker from being misassembled. Specifically, the installation guide positioning step <NUM> includes a first step <NUM> and a second step <NUM>, a distance between the first step <NUM> and the front end face is larger than that between the second step <NUM> and the front end face, an upper end of the first step <NUM> is connected with an upper surface of the circuit breaker housing <NUM>, and a lower end of the second step <NUM> is connected with a lower surface of the circuit breaker housing <NUM>. Further, the first step <NUM> and the second step <NUM> are arranged in parallel, and the first step and the second step are both parallel to the front end face and the rear end face.

Preferably, as shown in <FIG>, the miniature circuit breaker further includes an indicating apparatus, and the indicating apparatus is in driving fit with the operating member. In the embodiment, the indicating apparatus is in driving fit with the operating member, and when the miniature circuit breaker is switched on, the operating member drives the indicating apparatus to shield the wire removal hole <NUM>. Further, the indicating apparatus may be the above indicating apparatus. Further, the operating member may be the button mechanism <NUM> or the operating handle.

Claim 1:
A miniature circuit breaker, comprising a circuit breaker housing (<NUM>), a button mechanism (<NUM>), and an indicating apparatus, the circuit breaker housing (<NUM>) comprising an indicating hole arranged in one side thereof, the button mechanism (<NUM>) being in sliding fit with the circuit breaker housing (<NUM>), the indicating apparatus being in driving fit with the button mechanism (<NUM>); characterized in that the circuit breaker housing (<NUM>) comprises at least one wire insertion hole (<NUM>) and at least one wire removal hole (<NUM>) which are arranged in one side thereof, the wire insertion hole (<NUM>) is matched with the wire removal hole (<NUM>) for use; the button mechanism (<NUM>), the wire removal hole (<NUM>), and the wire insertion hole (<NUM>) are located at a same end of the circuit breaker housing (<NUM>); the wire removal hole (<NUM>) is used as the indicating hole, and when the button mechanism (<NUM>) is pressed to switch on the miniature circuit breaker, the button mechanism (<NUM>) drives the indicating apparatus to shield the indicating hole.