CN220155455U - Leakage protection module of circuit breaker - Google Patents

Abstract

The utility model relates to the field of piezoelectric devices, in particular to a leakage protection module of a circuit breaker, which comprises a module shell, an indication button, a circuit board assembly, a release and a reset piece, wherein the indication button is arranged on the module shell; the circuit board assembly and the release are arranged in the module shell, the circuit board assembly is electrically connected with the release and is used for outputting a control signal to the release, one end of the indication button protrudes out of the module shell and is used for indicating the working state of the release, the other end of the indication button is positioned in the module shell and is matched with the release, one end of a push rod structure of the release penetrates through the side wall of the module shell, and the reset piece is in transmission fit with the indication button and is used for bearing force to drive the indication button to reset; the leakage protection module has the advantages that the module shell of the leakage protection module effectively protects the circuit board assembly, the service life of the leakage protection module is prolonged, and the internal structure of the circuit breaker is simplified when the leakage protection module is applied to the circuit breaker.

Description

Leakage protection module of circuit breaker

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a leakage protection module of a circuit breaker.

Background

The existing residual current operated circuit breaker has the following problems:

1. the circuit board assembly of the leakage protection module is exposed and arranged, so that the circuit board assembly is easily damaged by electric arcs, ionized gas and/or high voltage in the circuit breaker, and leads between the circuit breaker and the release are many and complex, so that the circuit breaker is disordered in internal layout and easy to short circuit.

2. The indication button acts to form a large area, which occupies a large installation space;

3. the reset piece for driving the indicating button to reset is unreliable to install and is easy to deviate from the working position, so that the reset piece is invalid;

4. the circuit board assembly and the release are connected by a wire, so that the reliability is poor and the internal cleanliness is affected.

Disclosure of Invention

The utility model aims to overcome at least one defect in the prior art and provides a leakage protection module of a circuit breaker, wherein a module shell of the leakage protection module effectively protects a circuit board assembly, so that the service life of the leakage protection module is prolonged, and the internal structure of the circuit breaker is simplified when the leakage protection module is applied to the circuit breaker.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a leakage protection module of circuit breaker, the leakage protection module includes module casing, instruction button, circuit board subassembly, release and reset piece; the circuit board assembly is electrically connected with the release and is used for outputting a control signal to the release, one end of the indicating button protrudes out of the module shell and is used for indicating the working state of the release, the other end of the indicating button is located in the module shell and is matched with the release, one end of a push rod structure of the release penetrates through the side wall of the module shell, and the reset piece is in transmission fit with the indicating button and is used for being stressed to drive the indicating button to reset.

Further, the module shell comprises an upper cover and a lower shell which are buckled relatively, and the circuit board assembly is respectively in limit fit with the upper cover and the lower shell and is fixed between the upper cover and the lower shell.

Further, the release is arranged in the lower shell and is positioned between the circuit board assembly and the lower shell, and one end of the ejector rod structure penetrates through the side wall of the lower shell.

Further, the circuit board assembly comprises a PCB and a contact structure arranged on the PCB; the upper cover comprises an isolation notch, the side wall of the isolation notch is a notch side wall, the notch side wall and the PCB are propped against each other to form an isolation space separated from the inner space of the module shell, and the contact structure is located in the isolation space.

Further, the electric leakage protection module further comprises a positioning column, wherein the positioning column comprises a positioning round table arranged in the middle of the positioning column; the upper cover comprises a positioning structure, and the positioning structure comprises a positioning hole, a positioning claw and a positioning protrusion; in the axial direction of the positioning column, one end of the positioning column penetrates through the positioning hole to prop against the circuit board assembly, the other end of the positioning column protrudes out of the module shell, and the positioning round table is limited between the clamping hook of the positioning claw and the positioning protrusion to limit the axial movement of the positioning column.

Further, the upper cover further comprises an indication button hole and an upper cover guide wall, and the upper cover guide wall is arranged on the radial outer side of the indication button hole; one end of the indicating button passes through the indicating button hole and protrudes outside the module shell, and the indicating button is in sliding contact with the upper cover guide wall.

Further, the upper cover comprises a plurality of upper cover press bars, the lower shell comprises a plurality of lower shell support bars, and the upper cover press bars and the lower shell support bars are respectively propped against two sides of the PCB of the circuit board assembly.

Further, the lower shell further comprises a lower shell positioning rib, the PCB of the circuit board assembly comprises a PCB limiting groove, and the lower shell positioning rib is inserted into the PCB limiting groove.

Further, the module housing further comprises a plurality of groups of buckling structures, each group of buckling structures comprises a clamping table and a clamping hole which are matched for use, and one clamping table and one clamping hole of each group of buckling structures are arranged on the upper cover, and the other clamping table and the other clamping hole of each group of buckling structures are arranged on the lower shell.

Further, the leakage protection module further comprises a linkage rod, the reset piece comprises a reset piece transmission part and a reset piece rotating shaft which are connected with each other, the reset piece rotating shaft is inserted on the module shell and is rotatably arranged around the axis of the reset piece rotating shaft, one end of the linkage rod is inserted into the module shell and is connected with the indicating button, the other end of the linkage rod is in transmission fit with the reset piece transmission part, and the reset piece transmission part is further used for bearing force to drive the indicating button to reset.

Further, the module shell comprises a reset piece shaft hole, and the side wall of the reset piece shaft hole comprises a hole wall front section and a hole wall rear section which are oppositely arranged at intervals along the axial direction of the reset piece shaft hole; the reset piece rotating shaft comprises a reset piece shaft stem and a rotating shaft positioning protrusion, wherein the rotating shaft positioning protrusion is arranged on the side wall of the axial middle part of the reset piece shaft stem, the reset piece shaft stem is rotatably inserted in the reset piece shaft hole, and the rotating shaft positioning protrusion is positioned between the front hole wall section and the rear hole wall section and is respectively in limit fit with the front hole wall section and the rear hole wall section to limit the reset piece to axially move along the reset piece rotating shaft.

Further, the linkage rod comprises a linkage rod driving head, a linkage rod positioning section and a linkage rod inserting section which are connected in sequence and coaxially arranged, and the outer diameter of the linkage rod positioning section is larger than that of the linkage rod inserting section;

the indicating button comprises a button jack and a button limiting protrusion, and the button limiting protrusion is arranged on the radial outer side of the insertion end of the button jack; the linkage rod inserting section is rotatably inserted in the button jack, and the connecting part of the linkage rod positioning section and the linkage rod inserting section forms a step surface which is in limit fit with the limit protrusion of the button.

Further, the reset piece transmission part comprises a reset piece transmission plate and a reset piece transmission table, wherein the reset piece transmission plate is connected with the reset piece rotating shaft, and the reset piece transmission table is arranged on one side, far away from the module shell, of the reset piece transmission plate and is used for being matched with a rocker arm of an operating mechanism of the circuit breaker.

Further, the ejector rod structure comprises a movable iron core, and the ejector rod structure is arranged along the axial movement of the movable iron core; the indicating button comprises a button positioning surface, a button limiting surface and a button locking surface, wherein the button limiting surface extends towards the bulge on the side where the movable iron core is located relative to the button positioning surface; in the initial state of the release, the ejector rod structure is positioned at the initial position and is in limit fit with the button positioning surface; the release is in an action state, the ejector rod structure is located at an action position and is in limit fit with the button limiting surface, and meanwhile, the button locking surface is in limit fit with the ejector rod structure to prevent the ejector rod structure from being reset to an initial position from the action position, so that the release is kept in the action state.

The circuit board assembly is arranged in the module shell, the circuit board assembly is isolated from other components in the circuit breaker, the circuit board assembly is prevented from being damaged by electric arcs, ionized gas and/or high voltage in the circuit breaker, and the service lives of the circuit board assembly and the leakage protection module are prolonged; moreover, the release is also arranged in the module shell, and a structure for realizing the electrical connection of the release and the circuit board assembly is positioned in the module shell, so that the circuit structure inside the circuit breaker is simplified, and the neatness of the internal structure of the circuit breaker is improved.

In addition, the relative position setting mode of button locating surface and button limiting surface is favorable to reducing the travel of instruction button to reduce the required space of instruction button action, be favorable to reducing the whole specification size of circuit breaker.

In addition, the pivot location arch cooperates with pore wall anterior segment, pore wall back end, restricts the axial displacement of piece that resets along resetting the piece pivot, guarantees that the piece that resets reliably stabilizes keeps in the working position, avoids because of resetting the piece and removes and lead to resetting piece and gangbar to break away from the condition emergence of cooperation.

In addition, one end of the binding post penetrates through the PCB of the circuit board assembly and is electrically connected with the circuit board assembly, so that the connection structure of the release and the circuit board assembly is simplified, and the assembly reliability of the circuit board assembly is improved

Drawings

Fig. 1 is a schematic structural view of a circuit breaker of the present utility model;

fig. 2 is a schematic view of the circuit breaker of the present utility model, with the circuit breaker housing removed as compared to fig. 1;

FIG. 3 is a schematic view of the leakage protection module according to the present utility model at a first viewing angle;

FIG. 4 is an enlarged schematic view of the portion A of FIG. 2 in accordance with the present utility model;

FIG. 5 is a schematic view of the leakage protection module according to the present utility model at a second viewing angle;

FIG. 6 is an enlarged schematic view of the portion B of FIG. 5 in accordance with the present utility model;

FIG. 7 is a schematic view of the leakage protection module according to the present utility model at a third view angle;

FIG. 8 is an enlarged schematic view of the structure of portion C of FIG. 7 in accordance with the present utility model;

FIG. 9 is an exploded view of the leakage protection module of the present utility model;

FIG. 10 is an enlarged schematic view of the portion D of FIG. 9 in accordance with the present utility model;

FIG. 11 is a schematic view of the structure of the lower case of the present utility model;

FIG. 12 is a schematic view of the structure of the upper cover of the present utility model;

FIG. 13 is a schematic view of the release, reset member, linkage bar and indicator button of the present utility model in an assembled state;

FIG. 14 is a schematic cross-sectional view of a release of the present utility model;

FIG. 15 is a schematic view of the construction of the indicator button of the present utility model;

FIG. 16 is a schematic view of the reset element of the present utility model;

FIG. 17 is a schematic view of the structure of the linkage rod of the present utility model;

FIG. 18 is a schematic view of the operating mechanism of the present utility model;

FIG. 19 is a schematic view of the cooperation of the operating mechanism and the reset member of the present utility model.

Description of the reference numerals

A circuit breaker 100; a breaker housing h0; an operating mechanism o; a rocker arm o1; rocker arm boss o10; a first knob k1; a second knob k2; 100-10 parts of traction rod; an overcurrent protection mechanism 100-11;

a leakage protection module l p;

a module housing h1; the buckling structure h1-0; clamping table h1-00; the clamping hole h1-01;

a positioning column 1; positioning a column cap 1-0; positioning a column neck 1-1; positioning a round table 1-2; positioning a column body 1-3;

an upper cover 2; indicating button hole 2-00; 2-01 of a first knob hole; a second knob hole 2-02; isolation notch 2-1; 2-10 parts of notch side walls; positioning structure 2-2; positioning claws 2-20; positioning bulges 2-21; positioning holes 2-22; 2-3 parts of upper cover pressing ribs; upper cover guide walls 2-4;

a button elastic member 3;

an indication button 4; an indicator head 4-0; button neck 4-1; a fitting portion 4-2; 4-20 parts of button positioning surfaces; button limiting surface 4-21; button jacks 4-22; button limit bump 4-23;

a wiring board assembly 5; 5-0 parts of a PCB; 5-00 parts of a PCB limit groove; a contact structure 5-1;

a trip 6; 6-0 parts of framework; a coil 6-1; 6-10 binding posts; 6-23 of ejector rod structures; a movable iron core 6-2; a driving rod 6-3; a return spring 6-4; 6-5 parts of yoke iron; 6-6 parts of static iron cores;

a link lever 7; 7-0 of a linkage rod driving head; a linkage rod positioning section 7-1; the linkage rod inserting section 7-2;

a reset member 8; a reset piece transmission part 8-0; reset piece transmission plate 8-00; a reset piece transmission table 8-01; a reset piece transmission hole 8-02; a reset piece rotating shaft 8-1; 8-10 parts of reset piece shaft stems; the rotating shaft positioning bulges 8-11;

a lower case 9; trip unit assembly chamber 9-0; release jacks 9-1; reset piece shaft hole 9-2; the lower shell supports the rib 9-3; the lower shell positioning ribs 9-4; 9-49 parts of the front section of the hole wall; 9-50 parts of the rear section of the hole wall;

Detailed Description

Embodiments of the circuit breaker of the present utility model are further described below with reference to the examples shown in the drawings. The circuit breaker of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1-2, one embodiment of a circuit breaker 100 of the present utility model is shown.

The circuit breaker 100 of this embodiment includes a circuit breaker housing h0, and an operating mechanism o, a contact system, a traction rod 100-10 and a leakage protection module l p respectively disposed in the circuit breaker housing h0, where the contact system includes a moving contact mechanism connected with the operating mechanism o in a transmission manner, the operating mechanism o drives the moving contact mechanism to rotate so as to close and break the contact system, that is, the circuit breaker 100 is closed and opened, the traction rod 100-10 is rotatably disposed and is in trigger fit with the operating mechanism o, that is, the traction rod 100-10 is driven by an external force to rotate, so as to trigger the operating mechanism o to trip, and when the leakage protection module l p monitors that the circuit where the circuit breaker 100 is located generates leakage current, the traction rod 100-10 is driven to rotate. Further, the traction rod 100 is in driving fit with the rebuckles of the operating mechanism o, the traction rod 100-10 is driven by external force to rotate, the traction rod 100-10 drives the rebuckles to rotate, the rebuckles are released from limiting fit with the lock catches of the operating mechanism o, the lock catches rotate to release the snap fit with the jump buckles of the operating mechanism o, and the operating mechanism o is tripped to trip. It should be noted that the operating mechanism o may be implemented using a four-bar linkage operating mechanism as known in the art.

As shown in fig. 2-3, 5, 7, and 9, the leakage protection module l p includes a module housing h1, an indication button 4, a circuit board assembly 5, a release 6, and a reset member 8; the circuit board assembly 5 and the release 6 are disposed in the module housing h1, the circuit board assembly 5 is electrically connected with the release 6 and is used for outputting a control signal to the release 6 (for example, the control signal may be a current signal for enabling the release 6 to act), one end of the indicating button 4 protrudes outside the module housing h1 and is used for indicating the working state of the release 6, that is, indicating whether the release 6 is in an acting state or an initial state, the other end of the indicating button 4 is located in the module housing h1 and is matched with the release 6, one end of a push rod structure 6-23 of the release 6 penetrates through a side wall of the module housing h1 and is used for being in transmission fit with a traction rod 100-10, the release 6 acts after receiving the control signal, the push rod structure 6-23 drives the traction rod 100-10 to rotate, the traction rod 100-10 triggers the operating mechanism o to trip, and the reset element 8 is in transmission fit with the indicating button 4 to force so as to drive the indicating button 4 to reset, that the reset element 8 is in transmission fit with the operating mechanism o to be driven by the operating mechanism o so as to drive the indicating button 4 to reset. The module case h1 is provided independently of the circuit breaker case h0 of the circuit breaker 100. The leakage protection module l p, in which the circuit board assembly 5 is disposed in the module housing h1, isolates the circuit board assembly 5 from other components in the circuit breaker 100, prevents the circuit board assembly 5 from being damaged by an arc, ionized gas and/or high voltage in the circuit breaker 100, and is beneficial to prolonging the service lives of the circuit board assembly 5 and the leakage protection module l p; moreover, the release 6 is also arranged in the module shell h1, and a structure for realizing the electrical connection between the release 6 and the circuit board assembly 5 is positioned in the module shell h1, so that the circuit structure inside the circuit breaker is facilitated to be simplified, and the neatness of the circuit breaker inner structure is improved. Further, the indication button 4 has two working positions; an ejection position and a retracted position, the indicating button 4 being configured to reciprocate to switch between the ejection position and the retracted position; in the initial state of the release 6, the ejector rod structure 6-23 of the release 6 and the indication button 4 have first limit fit to limit the indication button 4 at the retracted position, the release 6 receives a control signal to act and switches to an action state to enable the ejector rod structure 6-23 to release the first limit fit with the indication button 4, meanwhile, the operating mechanism o is triggered to release to trip, the indication button 4 is switched to an ejection position from the retracted position, the indication button 4 and the ejector rod structure 6-23 of the release 6 establish second limit fit to keep the indication button 4 at the ejection position, and meanwhile, the indication button 4 and the ejector rod structure 6-23 of the release 6 establish third limit fit to limit the release 6 at the action state; when the operating mechanism o is operated by external force to be rebuckled, the reset piece 8 drives the indicating button 4 to move from the ejection position to the retraction position, the indicating button 4 releases the second limit fit and the third limit fit with the release 6, the release 6 is switched from the action state to the initial state, then the ejector rod structure 6-23 of the release 6 and the indicating button 4 establish the first limit fit again, and the indicating button 4 is limited at the retraction position; the cooperating structure between the indicating button 4 and the release 6 will be described in detail later. Further, the moving direction of the indication button 4 is perpendicular to the moving direction of the ejector rod structure 6-23.

As shown in fig. 9, 13-14, the leakage protection module l p further includes a button elastic member 3, and the button elastic member 3 applies a force to the indication button 4 so as to have a tendency to move toward the ejection position; that is, when the release 6 is in the initial state and the indication button 4 is in the retracted position, the button elastic member 3 stores energy; when the release 6 is switched from the initial state to the action state, the button elastic piece 3 releases energy to drive the indication button 4 to move to the ejection position. Further, the button elastic piece 3 is a spring, and two ends of the spring are respectively matched with the button indicating piece 4 and the release 6. Further, two ends of the spring are respectively matched with the button indicator 4 and the framework 6-0 of the release 6.

As shown in fig. 2, the circuit breaker 100 of the present embodiment further includes an over-current protection mechanism 100-11, where the over-current protection mechanism 100-11 drives the traction lever 100-10 to rotate when a short circuit or overload fault occurs in a circuit where the circuit breaker 100 is located, and the traction lever 100-10 drives the operating mechanism o to trip at the same time.

As shown in fig. 2, 4, 7, 9, 11-12, the module housing h1 includes an upper cover 2 and a lower housing 9 that are fastened together relatively, and the circuit board assembly 5 is fixed between the upper cover 2 and the lower housing 9 in a limit fit with the upper cover 2 and the lower housing 9, respectively. Further, the release 6 is disposed in the lower housing 9 and between the circuit board 5 and the lower housing 9, and the ejector rod structure 6-23 penetrates through the side wall of the lower housing 9 to be in driving engagement with the traction rod 100-10 so as to drive the traction rod 100-10 to rotate. Further, the module housing h1 has an overall L-shaped structure, and the upper cover 2 and the lower case 9 also have L-shaped structures, respectively.

As shown in fig. 2, 3, 5, 9, 12, the circuit board assembly 5 includes a PCB board 5-0 and a contact structure 5-1 disposed on the PCB board 5-0; the upper cover 2 comprises an isolation gap 2-1, the side wall of the isolation gap 2-1 is a gap side wall 2-10, the gap side wall 2-10 and the PCB 5-0 are propped against each other to form an isolation space separated from the inner space of the module shell h1, and the contact piece structure 5-1 is positioned in the isolation space, so that the contact piece structure 5-1 (strong current part) is separated from other electronic devices (weak current part) of the circuit board assembly 5, short circuit of the contact piece structure 5-1 and the other electronic devices (weak current part) is avoided, the circuit board assembly 5 is damaged, and the service life of the circuit board assembly 5 is prolonged. Further, the notch side wall 2-10 is a U-shaped side wall, two ends of an opening of the U-shaped structure are respectively connected with the side wall of the upper cover 2, one U-shaped side edge of the notch side wall is connected with the bottom wall of the upper cover 2, and the other U-shaped side edge of the notch side wall abuts against the PCB 5-0. Further, the contact structure 5-1 includes a contact and a contact point, wherein one end of the contact and the contact point are respectively and fixedly arranged on the PCB board 5-0, the other end of the contact is a contact end, the contact end is opposite to the contact point and keeps a normally open state, and the contact end is pressed by external force to contact with the contact point; for example, the leakage protection module l p further includes a test button, and the test button applies an external force to the contact end opposite to the contact end to make the contact end contact with the contact point, so as to simulate the leakage current and test the action performance of the leakage protection module l p.

As shown in fig. 9, the PCB 5-0 has an L-shaped structure and is correspondingly matched with the L-shaped structure of the module structure h 1.

As shown in fig. 1-3, 5-7 and 9-10, the leakage protection module l p further includes a positioning column 1, the positioning column 1 is used for pressing the circuit board assembly 5 on the lower shell 9 of the module housing h1, and the positioning column 1 includes a positioning round table 1-2 disposed in the middle of the positioning column 1; the upper cover 2 further comprises a positioning structure 2-2, wherein the positioning structure 2-2 comprises a positioning hole 2-22, a positioning claw 2-20 and a positioning protrusion 2-21; in the axial direction of the positioning column 1, one end of the positioning column 1 passes through the positioning hole 2-22 to prop against the circuit board assembly 5, the other end of the positioning column protrudes outside the module shell h1, and the positioning round table 1-2 is limited between the clamping hook of the positioning claw 2-20 and the positioning protrusion 2-21 to limit the axial movement of the positioning column 1. Further, a plurality of positioning claws 2-20 are arranged around the positioning column 1 along the circumferential direction of the positioning column 1; the positioning protrusions 2-21 are arranged around the positioning column 1 along the circumferential direction of the positioning column 1; in the circumferential direction of the positioning column 1, positioning claws 2-20 and positioning protrusions 2-21 are alternately arranged; the structure design is beneficial to ensuring the reliable and stable matching of the positioning column 1 and the positioning structure 2-2 of the upper cover 2.

As shown in fig. 10, the positioning column 1 further includes a positioning column cap 1-0, a positioning column neck 1-1 and a positioning column shaft 1-3, the positioning column cap 1-0, the positioning column neck 1-1, the positioning round table 1-2 and the positioning column shaft 1-3 are sequentially connected along the axial direction of the positioning column 1, and the free end of the positioning column shaft 1-3 is used for pressing the circuit board assembly 5 to press the circuit board assembly 5 on the lower shell 9.

As shown in fig. 2-3, 5 and 9, the positioning column 1 is located at the bending position of the L-shaped structure of the module housing h 1.

As shown in fig. 9 and 12, the upper cover 2 further includes an indication button hole 2-00 and an upper cover guide wall 2-4, and the upper cover guide wall 2-4 is disposed radially outward of the indication button hole 2-00; one end of the indicating button 4 passes through the indicating button hole 2-00 and protrudes outside the module housing h1 to indicate the working state of the release 6, and the indicating button 4 is in sliding contact with the upper cover guide wall 2-4 to guide the sliding track of the indicating button 4, so that the reliable action of the indicating button 4 is ensured. Further, the upper cover guide wall 2-4 is provided on the inner side of the upper cover 2, that is, on the side of the upper cover 2 facing the lower case 9. Further, the indication head 4-0 of the indication button 4 protrudes outside the module case h1 through the indication button hole 2-00 and is in sliding contact with the upper cover guide wall 2-4.

Referring to fig. 9 and 11-12, the upper cover 2 includes a plurality of upper cover press ribs 2-3, the lower shell 9 includes a plurality of lower shell support ribs 9-3, and the upper cover press ribs 2-3 and the lower shell support ribs 9-3 respectively abut against two sides of the PCB board 5-0 of the circuit board assembly 5, thereby improving the installation stability of the circuit board assembly 5.

As shown in fig. 9 and 11, the lower case 9 further includes a lower case positioning rib 9-4, the PCB 5-0 of the circuit board assembly 5 includes a PCB limiting groove 5-00, and the lower case positioning rib 9-4 is inserted into the PCB limiting groove 5-00 to form a reliable limit between the PCB 5-0 and the lower case 9. Further, the PCB limiting groove 5-00 is arranged at the side edge of the PCB 5-00.

As shown in fig. 3, 5, 7, 9, 11-12, the module housing h1 further includes a plurality of groups of fastening structures h1-0, each group of fastening structures h1-0 includes a clamping table h1-00 and a clamping hole h1-01 which are matched for use, one of the fastening structures h1-00 and the clamping hole h1-01 is arranged on the upper cover 2, and the other fastening structure is arranged on the lower shell 9; the buckling structure h1-0 not only improves the assembly efficiency of the upper cover 2 and the lower shell 9, but also ensures the reliable and stable matching of the upper cover 2 and the lower shell 9. Further, the clamping hole h1-01 is arranged on the clamping arm, one end of the clamping arm is connected with the corresponding upper cover 2 or lower shell 9, and the other end of the clamping arm is provided with the clamping hole h1-01.

As shown in fig. 5, 7, 9, 12, the leakage protection module l p further includes a linkage rod 7, the reset element 8 includes a reset element transmission portion 8-0 and a reset element rotating shaft 8-1 connected to each other, the reset element rotating shaft 8-1 is inserted on the module housing h1 and is rotatably disposed around its own axis, one end of the linkage rod 7 is inserted into the module housing h and is connected to the indication button 4, the other end of the linkage rod 7 is in transmission fit with the reset element transmission portion 8-0, and the reset element transmission portion 8-0 is further used for being stressed to drive the indication button 4 to reset; that is, the reset element transmission part 8-0 is driven by the operating mechanism o to rotate the reset element 8 around the axis of the reset element rotating shaft 8-1, and the reset element transmission part 8-0 simultaneously drives the indication button 4 to act through the linkage rod 7, so as to move from the ejection position to the retraction position.

7-8 and 16, the module housing h1 comprises a reset piece shaft hole 9-2, and the side wall of the reset piece shaft hole 9-2 comprises a hole wall front section 9-49 and a hole wall rear section 9-50 which are oppositely arranged at intervals along the axial direction of the reset piece shaft hole 9-2; the reset piece rotating shaft 8-1 comprises a reset piece shaft stem 8-10 and a rotating shaft positioning protrusion 8-11, wherein the rotating shaft positioning protrusion 8-11 is arranged on the side wall of the axial middle part of the reset piece shaft stem 8-10, the reset piece shaft stem 8-10 is rotatably inserted into the reset piece shaft hole 9-2, and the rotating shaft positioning protrusion 8-11 is positioned between the hole wall front section 9-49 and the hole wall rear section 9-50 and is respectively in limit fit with the hole wall front section 9-49 and the hole wall rear section 9-50 to limit the axial movement of the reset piece 8 along the reset piece rotating shaft 8-1; the rotating shaft positioning protrusions 8-11 are matched with the front section 9-49 of the hole wall and the rear section 9-50 of the hole wall, so that the reset piece 8 is limited to move along the axial direction of the rotating shaft 8-1 of the reset piece, the reset piece 8 is ensured to be reliably and stably kept at a working position, and the condition that the reset piece 8 is separated from the linkage rod 7 due to the movement of the reset piece 8 is avoided. Further, the inner side wall of the front hole wall section 9-49 is provided with an avoidance groove extending along the axial direction of the reset piece shaft hole 9-2, the rotary shaft positioning protrusion 8-11 enters between the front hole wall section 9-49 and the rear hole wall section 9-50 through the avoidance groove, the rotary shaft positioning protrusion 8-11 is arranged in a staggered manner with the avoidance groove after the reset piece transmission part 8-0 is matched with the linkage rod 7, and the rotary shaft positioning protrusion 8-11 is prevented from entering the avoidance groove again in the normal working rotation process of the reset piece 8.

Referring to fig. 13, 15, and 17, the linkage rod 7 includes a linkage rod driving head 7-0, a linkage rod positioning section 7-1, and a linkage rod inserting section 7-2, which are sequentially connected and coaxially arranged, and the outer diameter of the linkage rod positioning section 7-1 is larger than the outer diameter of the linkage rod inserting section 7-2; the indicating button 4 comprises a button jack 4-22 and a button limiting protrusion 4-23, and the button limiting protrusion 4-23 is arranged on the radial outer side of the insertion end of the button jack 4-22; the linkage rod inserting section 7-2 is rotatably inserted into the button jack 4-22, and a step surface in limit fit with the button limit protrusion 4-23 is formed at the joint of the linkage rod positioning section 7-1 and the linkage rod inserting section 7-2. The link lever 7 is free to rotate relative to the indication button 4, thereby reducing friction when the reset member 8 engages the link lever 7. Further, the outer diameter of the linkage rod driving head 7-0 is larger than the outer diameter of the linkage rod positioning section 7-1. Further, the reset piece transmission part 8-0 comprises a reset piece transmission hole 8-02, and the linkage rod driving head 7-0 is movably inserted into the reset piece transmission hole 8-02. Further, the cross section of the reset piece transmission hole 8-02 is in a triangular structure, and the matching process of the reset piece transmission hole 8-02 and the linkage rod driving head 7-0 is the prior art and will not be described herein.

As shown in fig. 9, 16 and 18-19, the reset element transmission part 8-0 includes a reset element transmission plate 8-00 and a reset element transmission table 8-01, the reset element transmission plate 8-00 is connected with the reset element rotating shaft 8-1, the reset element transmission table 8-01 is arranged on one side of the reset element transmission plate 8-00 away from the module housing h1, and the reset element transmission table 8-01 is used for being in transmission fit with the operating mechanism o. Further, the operating mechanism o comprises a rocker arm o1, and the rocker arm o1 is driven by external force to rotate so as to switch on or switch off the operating mechanism o; the rocker arm o1 comprises a rocker arm bulge o10 protruding towards the reset piece 8, the rocker arm bulge o10 is in transmission fit with the reset piece transmission table 8-01, reliable and stable transmission between the operating mechanism o and the reset piece 8 is ensured, and the occurrence of transmission failure of the operating mechanism o and the reset piece is avoided.

As shown in fig. 16, the reset member transmission hole 8-02 and the reset member transmission table 8-01 are provided on both sides of the reset member transmission plate 8-00, respectively.

As shown in fig. 12-13 and 15, the indication button 4 includes a button positioning surface 4-20 and a button limiting surface 4-21, the button limiting surface 4-21 extends towards the side where the axis of the movable iron core 6-2 is located with respect to the button positioning surface 4-20, and the button limiting surface 4-21 is closer to the movable iron core 6-2 with respect to the protrusion of the button positioning surface 4-20; in the initial state of the release 6, the ejector rod structure 6-23 is located at an initial position and is in limit fit with the button positioning surface 4-20 (i.e. there is a first limit fit between the ejector rod structure 6-23 and the indication button 4) so as to limit the indication button 4 at a retracted position; in the action state of the release 6, the ejector rod structure 6-23 is located at the action position and is in limit fit with the button limiting surfaces 4-21 (i.e. there is a second limit fit between the ejector rod structures 6-23) so as to limit the indication button 4 at the ejection position, and meanwhile, the button locking surface is in limit fit with the ejector rod structure 6-23 (i.e. there is a third limit fit between the ejector rod structure 6-23 and the indication button 4) so as to prevent the ejector rod structure 6-23 from resetting from the action position to the initial position, thereby keeping the release 6 in the action state; the relative position setting mode of the button positioning surface 4-20 and the button limiting surface 4-21 is beneficial to reducing the moving stroke of the indication button 4, thereby reducing the space required by the action of the indication button 4 and reducing the overall specification and size of the circuit breaker. Specifically, the indication button 4 comprises a matching part 4-2, and the matching part 4-2 is of a frame-shaped structure and is sleeved outside the ejector rod structure 6-23; the matching part 4-2 comprises a matching edge, the button positioning surface 4-20 and the button limiting surface 4-21 are arranged on a first side of the matching edge, the first side faces the ejector rod structure 6-23, the button locking surface is arranged on a second side of the matching edge, and the second side is adjacent to the first side; the ejector rod structure 6-23 comprises an ejector rod positioning protrusion and an ejector rod limiting surface, and the free end of the ejector rod positioning protrusion is offset relative to the ejector rod limiting surface in a direction away from the axis of the movable iron core 6-2; the ejector rod positioning protrusion is in limit fit with the button positioning surface 4-20 to limit the indication button 4 at the retracted position; the ejector rod limiting surface is in limiting fit with the button limiting pieces 4-21 to limit the indication button 4 at the ejection position; the release 6 is kept in an action state by the limiting cooperation of the button locking surface and the ejector rod positioning protrusion, and the button locking surface is positioned on one side of the ejector rod positioning protrusion in the axial direction of the movable iron core 6-2. Specifically, as shown in fig. 12, the ejector rod positioning protrusion is arranged to protrude downwards, the free end of the ejector rod positioning protrusion is offset downwards relative to the ejector rod limiting surface, and the button limiting surface 4-21 is offset upwards relative to the button positioning surface 4-20.

As shown in fig. 15, the indication button 4 further includes a button neck 4-1, and the button head 4-0, the button neck 4-1 and the mating portion 4-2 are sequentially connected; the button jack 4-22 and the button spacing protrusion 4-23 are respectively arranged on the matching part 4-22. Further, the indicating head 4-0 is of a cylindrical structure.

As shown in fig. 13-14, the release 6 further includes a frame 6-0, a coil 6-1, a return spring 6-4, a yoke 6-5 and a static iron core 6-6, wherein the coil 6-1 is sleeved on the frame 6-0, the static iron core 6-6 is arranged in the frame 6-0, the ejector rod structure 6-23 includes a movable iron core 6-2 and a driving rod 6-3 which are connected with each other, the movable iron core 6-2 is slidably arranged in the middle of the frame 6-0 and is in opposite fit with the static iron core 6-6, the yoke 6-5 is fixedly arranged on the frame 6-0 and encloses the coil 6-1 and the static iron core 6-6 therein, the return spring 6-4 is sleeved outside the movable iron core 6-2, one end of the return spring is matched with the frame 6-0, and the other end of the return spring is matched with the driving rod 6-3. Further, the release 6 further comprises binding posts 6-10, the binding posts 6-10 are fixedly arranged on the framework 6-0, and two ends of the coils 6-1 of the two binding posts 6-0 are electrically connected. Further, one end of the binding post 6-0 penetrates through the PCB 5-0 of the circuit board assembly 5 and is electrically connected with the circuit board assembly 5, so that the connection structure of the release 6 and the circuit board assembly 5 is simplified, and the assembly reliability of the circuit board assembly 5 is improved.

As shown in fig. 9, 11 and 14, the lower case 9 is provided with a release assembly cavity 9-0, and a release jack 9-1 is arranged on the bottom wall of the release assembly cavity 9-0; the framework 6-0 is provided with framework clamping feet which are inserted into the release jack 9-1 and are in snap fit with the lower shell 9, so that the assembly stability of the release 6 is improved. Further, the trip unit assembling chamber 9-0 is provided on one side of the L-shaped structure of the lower case 9.

As shown in fig. 1, 3, 5, and 9, the leakage protection module l p further includes a first knob k1 and a second knob k2, and the first knob k1 and the second knob k2 are respectively engaged with the circuit board assembly 5. Further, the button head 4-0, the first knob k1 and the second knob k2 of the indication button 4 are sequentially arranged side by side. Further, the upper cover 2 of the module housing h1 is provided with a first knob hole 2-01 and a second knob hole 2-02 respectively matched with the first knob k1 and the second knob k 2.

As shown in fig. 3, 5, 7, and 9, a layout manner of the leakage protection module t is as follows: the lower shell 9 is of an L-shaped structure, one side of the L-shaped structure is provided with a release assembly cavity 9-0, the release 6 is arranged in the release assembly cavity 9-0, and the other side of the L-shaped structure of the lower shell 9 is provided with an electronic element avoiding cavity for accommodating electronic elements of the circuit board assembly 5, which are arranged on one side of the PCB 5-0 facing the lower shell 9; the upper cover 2 is of an L-shaped structure, the indication button hole 2-00, the first knob hole 2-01 and the second knob hole 2-02 are arranged on one edge of the L-shaped structure of the upper cover 2 and are positioned on one side of the release 6, and the isolation notch 2-1 is arranged at the bending position of the upper cover 2; the indicating button 4 is inserted in the release assembly cavity 9-0 to be matched with the ejector rod structure 6-23 of the release 6, and one end of the indicating button passes through the circuit board assembly 5 to be inserted in the indicating button hole 2-00; one end of the linkage rod 7 is inserted on the indication button 4, and the other end of the linkage rod passes through the side wall of the release assembly cavity 9-0 and then protrudes outside the lower shell 9; the reset piece rotating shaft 8-1 of the reset piece 8 is rotatably arranged on the bottom wall of the release assembly cavity 9-0, and the reset piece transmission part 8-0 of the reset piece 8 is positioned on one side of the release assembly cavity 9-0 and outside the lower shell 9 and is in transmission fit with the linkage rod 7.

The following is an assembly process of the leakage protection module:

firstly, a coil assembly consisting of a framework 6-0, a coil 6-1, a magnetic yoke 6-5, a static iron core 6-6 and a binding post 6-10 is placed into a release assembly cavity 9-0 of a lower shell 9; then, the reset spring 6-4, the indication button 4 and the button elastic piece 3 are respectively arranged in the release assembly cavity 9-0; then, the movable iron core 6-2 passes through the side wall of the release assembly cavity 9-0, the reset spring 6-4 and the indication button 4, and is finally inserted into the middle part of the framework 6-0; then, the circuit board assembly 5 is installed in the lower shell 9, and the indication button 4 and the binding post 6-10 respectively penetrate through corresponding holes of the PCB 5-0 of the circuit board assembly 5; then, the upper cover 2 is buckled with the lower shell 9, and the indicating head 4-0 of the indicating button 4 passes through the upper cover 2; then, the linkage rod 7 passes through the side wall of the release assembly cavity 9-0 to be mounted on the indication button 4; then, the restoring member 8 is rotatably mounted on the lower case 9 such that the restoring member transmission hole 8-2 of the restoring member 8 is engaged with the link lever driving head 7-0 of the link lever 7. Further, before the upper cover 2 and the lower case 9 are buckled, the first knob k1 and the second knob k2 are installed on the circuit board assembly 5; the positioning column 1 is mounted on the upper cover 2 to be matched with the positioning structure 2-2 of the upper cover 2 before and after the upper cover 2 is buckled with the lower shell 9.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (14)

1. A leakage protection module for a circuit breaker, characterized by: the leakage protection module comprises a module shell (h 1), an indication button (4), a circuit board assembly (5), a release (6) and a reset piece (8); circuit board subassembly (5) and release (6) set up in module casing (h 1), circuit board subassembly (5) are electric to link to each other and are used for to release (6) output control signal, instruction button (4) one end protrusion is used for instructing the operating condition of release (6) and the other end is located module casing (h 1) and cooperates with release (6) outside module casing (h 1), ejector pin structure (6-23) one end of release (6) passes the lateral wall of module casing (h 1), reset piece (8) and instruction button (4) transmission cooperation are used for the atress in order to drive instruction button (4) to reset.

2. The leakage protection module of a circuit breaker according to claim 1, wherein: the module shell (h 1) comprises an upper cover (2) and a lower shell (9) which are buckled relatively, and the circuit board assembly (5) is fixed between the upper cover (2) and the lower shell (9) in limit fit with the upper cover (2) and the lower shell (9) respectively.

3. The leakage protection module of a circuit breaker according to claim 2, characterized in that: the release (6) is arranged in the lower shell (9) and is positioned between the circuit board assembly (5) and the lower shell (9), and one end of the ejector rod structure (6-23) penetrates through the side wall of the lower shell (9).

4. The leakage protection module of a circuit breaker according to claim 2, characterized in that: the circuit board assembly (5) comprises a PCB (5-0) and a contact structure (5-1) arranged on the PCB (5-0); the upper cover (2) comprises an isolation gap (2-1), the side wall of the isolation gap (2-1) is a gap side wall (2-10), the gap side wall (2-10) and the PCB (5-0) are propped against each other to form an isolation space separated from the inner space of the module shell (h 1), and the contact structure (5-1) is located in the isolation space.

5. The leakage protection module of a circuit breaker according to claim 2, characterized in that: the electric leakage protection module further comprises a positioning column (1), wherein the positioning column (1) comprises a positioning round table (1-2) arranged in the middle of the positioning column; the upper cover (2) comprises a positioning structure (2-2), and the positioning structure (2-2) comprises a positioning hole (2-22), a positioning claw (2-20) and a positioning protrusion (2-21); in the axial direction of the positioning column (1), one end of the positioning column (1) passes through the positioning hole (2-22) to prop against the circuit board assembly (5) and the other end of the positioning column protrudes out of the module shell (h 1), and the positioning round table (1-2) is limited between the clamping hook of the positioning claw (2-20) and the positioning protrusion (2-21) to limit the axial movement of the positioning column (1).

6. The leakage protection module of a circuit breaker according to claim 2, characterized in that: the upper cover (2) further comprises an indication button hole (2-00) and an upper cover guide wall (2-4), and the upper cover guide wall (2-4) is arranged on the radial outer side of the indication button hole (2-00); one end of the indicating button (4) passes through the indicating button hole (2-00) and protrudes outside the module shell (h 1), and the indicating button (4) is in sliding contact with the upper cover guide wall (2-4).

7. The leakage protection module of a circuit breaker according to claim 2, characterized in that: the upper cover (2) comprises a plurality of upper cover press ribs (2-3), the lower shell (9) comprises a plurality of lower shell support ribs (9-3), and the upper cover press ribs (2-3) and the lower shell support ribs (9-3) respectively abut against two sides of a PCB (5-0) of the circuit board assembly (5).

8. The leakage protection module of a circuit breaker according to claim 2, characterized in that: the lower shell (9) further comprises a lower shell positioning rib (9-4), the PCB (5-0) of the circuit board assembly (5) comprises a PCB limiting groove (5-00), and the lower shell positioning rib (9-4) is inserted into the PCB limiting groove (5-00).

9. The leakage protection module of a circuit breaker according to claim 2, characterized in that: the module shell (h 1) further comprises a plurality of groups of buckling structures (h 1-0), each group of buckling structures (h 1-0) comprises a clamping table (h 1-00) and a clamping hole (h 1-01) which are matched for use, and each group of buckling structures comprises a clamping table (h 1-00) and a clamping hole (h 1-01), one of the clamping tables is arranged on the upper cover (2), and the other clamping structure is arranged on the lower shell (9).

10. The leakage protection module of a circuit breaker according to claim 1, wherein: the leakage protection module further comprises a linkage rod (7), the reset piece (8) comprises a reset piece transmission part (8-0) and a reset piece rotating shaft (8-1), the reset piece rotating shaft (8-1) is inserted on the module shell (h 1) and is arranged in a rotating mode around the axis of the reset piece rotating shaft, one end of the linkage rod (7) is inserted into the module shell (h) and is connected with the indication button (4), the other end of the linkage rod (7) is in transmission fit with the reset piece transmission part (8-0), and the reset piece transmission part (8-0) is further used for bearing force to drive the indication button (4) to reset.

11. The leakage protection module of a circuit breaker of claim 10, wherein: the module shell (h 1) comprises a reset piece shaft hole (9-2), and the side wall of the reset piece shaft hole (9-2) comprises a hole wall front section (9-49) and a hole wall rear section (9-50) which are oppositely arranged at intervals along the axial direction of the reset piece shaft hole (9-2); the reset piece rotating shaft (8-1) comprises a reset piece shaft (8-10) and a rotating shaft positioning protrusion (8-11), the rotating shaft positioning protrusion (8-11) is arranged on the side wall of the axial middle part of the reset piece shaft (8-10), the reset piece shaft (8-10) is rotatably inserted into the reset piece shaft hole (9-2), the rotating shaft positioning protrusion (8-11) is positioned between the hole wall front section (9-49) and the hole wall rear section (9-50) and is in limit fit with the hole wall front section (9-49) and the hole wall rear section (9-50) respectively, and the reset piece (8) is limited to axially move along the reset piece rotating shaft (8-1).

12. The leakage protection module of a circuit breaker of claim 10, wherein: the linkage rod (7) comprises a linkage rod driving head (7-0), a linkage rod positioning section (7-1) and a linkage rod inserting section (7-2) which are connected in sequence and coaxially arranged, and the outer diameter of the linkage rod positioning section (7-1) is larger than the outer diameter of the linkage rod inserting section (7-2);

the indicating button (4) comprises a button jack (4-22) and a button limiting protrusion (4-23), and the button limiting protrusion (4-23) is arranged on the radial outer side of the insertion end of the button jack (4-22); the linkage rod inserting section (7-2) is rotatably inserted into the button jack (4-22), and a step surface in limit fit with the button limit protrusion (4-23) is formed at the joint of the linkage rod positioning section (7-1) and the linkage rod inserting section (7-2).

13. The leakage protection module of a circuit breaker of claim 10, wherein: the reset piece transmission part (8-0) comprises a reset piece transmission plate (8-00) and a reset piece transmission table (8-01), wherein the reset piece transmission plate (8-00) is connected with the reset piece rotating shaft (8-1), and the reset piece transmission table (8-01) is arranged on one side, far away from the module shell (h 1), of the reset piece transmission plate (8-00) and is used for being matched with a rocker arm of an operating mechanism of the circuit breaker.

14. The leakage protection module of a circuit breaker according to claim 1, wherein: the ejector rod structure (6-23) comprises a movable iron core (6-2), and the ejector rod structure (6-23) is arranged along the axial direction of the movable iron core (6-2) in a moving way; the indicating button (4) comprises a button positioning surface (4-20), a button limiting surface (4-21) and a button locking surface, wherein the button limiting surface (4-21) extends towards the side of the movable iron core (6-2) relative to the button positioning surface (4-20) in a protruding way; in an initial state, the ejector rod structure (6-23) is positioned at an initial position and is in limit fit with the button positioning surface (4-20); under the action state of the release (6), the ejector rod structure (6-23) is positioned at the action position and is in limit fit with the button limiting surface (4-21), and meanwhile, the button locking surface is in limit fit with the ejector rod structure (6-23) to prevent the ejector rod structure (6-23) from being reset to the initial position from the action position, so that the release (6) is kept under the action state.