A circuit breaker and a power-taking and shutting-off device for a circuit board thereof

Abstract

A power-off device for a circuit breaker circuit board comprises a base and a cover, wherein a conductive member is arranged on one side of the base, and the other side of the base is connected to the cover through an elastic connector, and an accommodating cavity is arranged along the axial direction of the cover, and a limiting structure and an elastic telescopic mechanism are arranged in the accommodating cavity, wherein the limiting structure comprises a limiting groove and a limiting portion alternately arranged along the circumferential direction of the accommodating cavity, and the elastic telescopic mechanism comprises a push rod and a rotor, wherein the push rod cooperates with the limiting groove to perform axial movement in the accommodating cavity, one end of the push rod serves as a force-applying portion, and one end of the rotor serves as a connecting end and is rotatably connected to the base through the other end of the accommodating cavity, and the rotor alternately cooperates with the limiting groove and the limiting portion during the movement process to make the elastic telescopic mechanism perform axial telescopic movement in the accommodating cavity, and the elastic connector drives the base and the conductive member to move in a direction close to or away from the cover during the movement process of the elastic telescopic mechanism. The present invention enables the circuit breaker to be subjected to a withstand voltage test without disassembling the circuit board.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical equipment, and in particular to a circuit breaker and a power-taking and closing device for a circuit board thereof. Background Art

[0002] Circuit breakers are one of the important electrical components in the low-voltage electrical field. They are used to connect and disconnect currents. When overcurrent or short circuit occurs in the circuit, they automatically cut off the circuit to protect power lines and motors. In the production process of circuit breakers, in order to verify the quality and electrical safety characteristics of the circuit breakers, it is necessary to perform a withstand voltage test on the circuit breakers to ensure that the insulation barrier between any two-phase electrode plates of the circuit breaker can withstand a certain intensity of high voltage without being broken down. When the existing circuit breakers are subjected to withstand voltage tests, in order to prevent the circuit board of the release from being broken down by high voltage, it is necessary to disconnect the electrical connection between the main circuit terminal and the circuit board. Usually, the circuit board needs to be removed from the circuit breaker and reinstalled after the test is completed. This operation of removing the circuit board is cumbersome and inefficient, and it also has a certain impact on the test of the withstand voltage performance of the circuit breaker. Summary of the invention

[0003] The object of the present invention is to overcome the defects of the prior art and provide a circuit breaker and a circuit board power-off device thereof which has a simple structure and is easy to operate.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A power-off device for a circuit board of a circuit breaker comprises a base and a cover, wherein a conductive member for connecting to the circuit board of the circuit breaker is arranged on one side of the base, and the other side of the base is connected to the cover via an elastic connector, and an accommodating cavity penetrating both sides of the cover is arranged along the axial direction of the cover, and a limiting structure and an elastic telescopic mechanism matched with the limiting structure are arranged in the accommodating cavity, wherein the limiting structure comprises limiting grooves and limiting parts alternately arranged along the circumferential direction of the accommodating cavity, and the elastic telescopic mechanism comprises a push rod and a rotor matched with each other, wherein the push rod and the limiting groove are matched in the accommodating cavity. The axial movement is performed in the accommodating cavity, one end of the push rod extends from one end of the accommodating cavity as a force-applying part, one end of the rotor is rotatably connected to the base through the other end of the accommodating cavity as a connecting end, the other end of the push rod cooperates with the other end of the rotor to drive the rotor to rotate and move axially, and the rotor cooperates with the limit groove and the limit part alternately during the movement. When the rotor cooperates with the limit part, the elastic telescopic mechanism extends to make the base and the conductive part move away from the cover shell, and when the rotor cooperates with the limit groove, the elastic telescopic mechanism shortens to make the base and the conductive part move toward the cover shell.

[0006] Furthermore, a retraction hole is provided at the other end of the push rod, and a first matching portion and a first acting portion that can move in the limiting groove are provided on the push rod. The first matching portion cooperates with the limiting groove to make the push rod move axially in the accommodating chamber, and the first acting portion is used to drive the rotor to move; the other end of the rotor is used as a retraction end to cooperate with the retraction hole of the push rod, and a second acting portion and a second matching portion are provided on the side wall of the rotor. The second acting portion cooperates with the first acting portion to make the rotor produce axial movement and circumferential rotation in a single direction. The first acting portion drives the rotor to move axially, which can make the retraction end move in the direction of extending into the retraction hole or move out of the retraction hole to realize the axial retractable movement of the elastic retractable mechanism. The second matching portion can alternately cooperate with the limiting groove and the limiting portion to limit the circumferential rotation of the rotor, and limit the rotor to move axially in the direction of the push rod and extend into the retraction hole.

[0007] Furthermore, a plurality of axial limiting grooves are provided on the upper part of the inner side wall of the accommodating cavity, and the plurality of limiting grooves are arranged equidistantly along the circumferential direction of the accommodating cavity, and a limiting portion is provided on the same side of each limiting groove and at one end close to the base, and the limiting portion is a sawtooth-shaped oblique end surface facing the base;

[0008] The push rod is provided with a plurality of corresponding first matching parts and first action parts, the plurality of first matching parts are arranged on the outer wall of the push rod at equal intervals along the circumferential direction of the push rod, the plurality of first action parts are protrudingly arranged at one end of the push rod close to the base, the first action part includes a first boss and a second boss protrudingly arranged in the direction of the base, the first boss is used to drive the rotor to perform axial movement and circumferential rotation in a single direction, the end surface of the first boss facing the base is used as a third sliding surface for sliding cooperation with the rotor; the second boss is located on the outer side of the first boss, and the end surface of the second boss facing the base is used as a fourth sliding surface for sliding cooperation with the rotor;

[0009] A plurality of second matching parts and second action parts corresponding to each other are protruded on the outer wall of the rotor. When the retracted end moves in the direction of extending into the retracted hole, the single-side side wall of the second matching part and the side wall of the limiting groove are limitedly matched to make the rotor only make axial movement. The outer end surface of the second matching part away from one end of the base serves as the fifth sliding surface. When the retracted end moves in the direction of moving out of the retracted hole, the second matching part rotates with the rotor so that the fifth sliding surface cooperates with the limiting part to stop the rotor from rotating. The second action part includes a sixth sliding surface and a fifth sliding surface. The sixth sliding surface is the inner end surface of the second matching part away from one end of the base. The sixth sliding surface cooperates with the third sliding surface to drive the axial movement of the rotor and the circumferential rotation in a single direction. The fifth sliding surface cooperates with the fourth sliding surface to drive the rotor to make axial movement and circumferential movement in a single direction.

[0010] Furthermore, the annular width of the first matching portion is equal to the annular width of the limiting groove, and the annular width of the second matching portion is smaller than the annular width of the limiting groove.

[0011] Furthermore, the elastic telescopic mechanism also includes a compression spring, which is arranged in the accommodating cavity and sleeved on the push rod between the first matching portion and the force applying portion, and is used to provide an elastic driving force for the push rod.

[0012] Furthermore, the limiting structure includes a plurality of first strip protrusions protruding from the upper portion of the inner wall of the accommodating cavity, the plurality of first strip protrusions being equidistantly spaced along the circumferential direction of the accommodating cavity, each first strip protrusion being axially arranged along the accommodating cavity and having a limiting portion on the same side of an end face close to an end of the base, and a limiting groove being formed between two adjacent first strip protrusions.

[0013] Furthermore, the limiting structure includes a plurality of limiting grooves, the end surface of the limiting groove close to one end of the base is set as an inclined end surface as a first sliding surface, a second strip protrusion is protruded on the same side of each limiting groove, the end surface of the second strip protrusion close to one end of the base is set as an inclined end surface as a second sliding surface, and the first sliding surface is connected to the second sliding surface to form a serrated limiting portion.

[0014] Furthermore, an opening groove with an opening facing downward is provided on the side wall of the cover shell at the lower part of the accommodating cavity, and a connecting rod matching the opening groove is provided on the base. When the elastic telescopic mechanism performs axial telescopic movement, the connecting rod can slide in the opening groove to cooperate with the base to move toward or away from the cover shell.

[0015] Furthermore, a first connecting part is provided on the outer side of the upper part of the cover shell, and a second connecting part is provided on the side of the base close to the cover shell, and the two ends of the elastic connecting member are respectively connected to the first connecting part and the second connecting part; a connecting ear plate for fixing is provided on the outer side of the middle part of the cover shell.

[0016] Furthermore, the cover shell is a hollow cylinder with one end closed and the other end open, and a central hole is provided in the middle of the closed end of the cover shell for the force-applying part of the elastic telescopic mechanism to pass through, and the open end of the cover shell is used to make the connecting end of the elastic telescopic mechanism rotatably connected to the base, and the hollow part in the middle of the cover shell serves as a accommodating chamber, and a limiting groove and a limiting part are provided in the upper part of the accommodating chamber, and four opening grooves are provided on the side wall of the cover shell at the lower part of the accommodating chamber, and the opening grooves are symmetrically arranged along the annular direction of the cover shell; a pair of protruding structures as a first connecting part are protruded on the outer side of the upper part of the cover shell, and the first connecting part and the opening groove are located on the same side of the cover shell, and a groove connected to the elastic connecting piece is provided on the first connecting part, and a pair of connecting ear plates are protruded on the outer side of the middle part of the cover shell.

[0017] Further, the push rod is a hollow cylinder with one end closed and the other end open, the closed end of the push rod serves as a force-applying portion, the hollow portion in the middle of the push rod serves as a retracted hole, a plurality of protruding structures serving as first matching portions are protruded from the outer wall of the push rod, the plurality of first matching portions are arranged at equal intervals along the circumferential direction of the push rod, the first matching portion is used to slide in the limiting groove, a protruding structure serving as a second boss is provided on an end surface of the first matching portion close to one end of the base, and an end surface of the second boss close to the base serves as a fourth sliding surface;

[0018] A protruding structure serving as a first boss is protruded from the end surface of the push rod close to one end of the base, and the protruding height of the first boss is smaller than the protruding height of the second boss. The end surface of the first boss close to the base serves as a third sliding surface, and the third sliding surface is a slope that is high in the middle and gradually lower on both sides.

[0019] Furthermore, the rotor is a rod body structure, one end of the rotor serves as a retracted end, and the other end of the rotor serves as a connecting end for rotatably cooperating with the base, and a plurality of plate-shaped second matching parts are arranged on the outer side wall near the connecting end of the rotor, and the plurality of second matching parts are arranged at equal intervals along the circumferential direction of the rotor, and each second matching part is arranged to protrude radially along the rotor, and the end surface of the second matching part away from the connecting end serves as a second action part, and the second action part is a stepped surface with a higher inner side and a lower outer side, and the second action part includes a higher sixth sliding surface and a lower fifth sliding surface, and the fifth sliding surface and the sixth sliding surface are both inclined surfaces with one side higher and the other side lower, and the inner side higher and the outer side lower.

[0020] Furthermore, the outer diameter of the connecting end of the rotor is larger than the outer diameter of the retracted end, and a connecting hole is provided in the middle of the end surface of the connecting end, and the connecting hole is used for rotationally connecting with the base.

[0021] Furthermore, the base is a plate-like structure with a cross-sectional area larger than the connecting end, and a columnar body for rotatably connecting to the connecting end is protruded in the middle of one side of the base, and an annular groove is arranged around the outer periphery of the columnar body and passes through both sides of the base, and the annular groove can be allowed to allow the lower part of the cover shell to slide through, and a connecting rod is radially arranged in the annular groove, and the connecting rod can slide with the open groove arranged in the lower part of the cover shell; a pair of protrusion structures as second connecting parts are arranged relatively on the outer side of the annular groove, and a groove structure for connecting the elastic connecting part is provided on each second connecting part.

[0022] Furthermore, the conductive member is made of elastic metal material, the middle part of the conductive member is used for fixed connection with the base, and the two ends of the conductive member are used as conductive parts for connecting with the circuit board of the circuit breaker, and the two conductive parts are inclined in a direction away from the base.

[0023] A circuit breaker comprises a shell and a circuit board arranged in the shell, wherein the power-taking shutoff device of the circuit breaker circuit board as described above is fixedly arranged in the shell, the force-applying part of the power-taking shutoff device of the circuit breaker circuit board extends out of the shell, and the conductive part of the power-taking shutoff device of the circuit breaker circuit board cooperates with the power access point of the circuit board.

[0024] A circuit breaker and a circuit board power-taking shutoff device thereof of the present invention enable a base and a conductive member to be close to or away from a circuit board through axial telescopic movement of an elastic telescopic mechanism inside the circuit board power-taking shutoff device and cooperation of an elastic connector, thereby realizing power-taking shutoff of the circuit board. When performing a withstand voltage test on the circuit breaker, there is no need to remove the circuit board, so the operation is convenient and work efficiency is improved.

[0025] In particular, the power-taking shutoff device of the present invention has a base and a cover connected as an integrated structure by an elastic connector, which can be directly installed on the circuit breaker by screws. The elastic telescopic mechanism is arranged inside the base and the cover. The elastic telescopic mechanism does not need to form an abutment relationship with the circuit breaker body, and the installation is convenient and reliable.

[0026] In addition, an annular groove and a connecting rod are provided on the base. With the cooperation of the annular groove, the base can move axially along the cover shell, which not only increases the range of motion of the base but also does not occupy too much space. The connecting rod is combined with the annular groove so that the base will not produce circular rotation when it moves axially on the cover shell, thereby avoiding the problem of poor contact between the conductive parts arranged on the base and the power access point of the circuit board due to misalignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a power-taking and closing device for a circuit breaker circuit board of the present invention;

[0028] Figure 2-4 It is a structural schematic diagram of a cover shell in a power-taking and closing device of a circuit breaker circuit board of the present invention;

[0029] Figure 5 It is a structural schematic diagram of a push rod in a power-taking and closing device of a circuit breaker circuit board of the present invention;

[0030] Figure 6 It is a structural schematic diagram of a rotor in a power-taking and closing device of a circuit breaker circuit board of the present invention;

[0031] Figure 7-8 It is a structural schematic diagram of a base in a power-taking and closing device of a circuit breaker circuit board of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of a conductive member in a power-taking and closing device of a circuit breaker circuit board of the present invention;

[0033] Fig.10It is a schematic diagram of the internal structure of a power-taking and closing device of a circuit breaker circuit board of the present invention;

[0034] Fig.11 It is a structural schematic diagram of a power-taking closing device of a circuit breaker circuit board of the present invention (closed state);

[0035] Fig.12 It is a structural schematic diagram of a power-taking and closing device of a circuit breaker circuit board of the present invention (open state);

[0036] Fig.13 It is an exploded schematic diagram of a power-taking and closing device of a circuit breaker circuit board of the present invention;

[0037] Fig.14 The present invention is a schematic structural diagram of a circuit breaker circuit board power-off device installed in the circuit breaker. DETAILED DESCRIPTION

[0038] The following is combined with Figures 1 to 14 The given embodiments further illustrate the specific implementation of a circuit breaker and a power-off device for a circuit board thereof of the present invention. The circuit breaker and a power-off device for a circuit board thereof of the present invention are not limited to the description of the following embodiments.

[0039] A power-off device for a circuit board of a circuit breaker comprises a base 4 and a cover 1, wherein a conductive member 6 for connecting to a circuit board 8 of the circuit breaker is arranged on one side of the base 4, and the other side of the base 4 is connected to the cover 1 via an elastic connector 5, and an accommodating cavity 11 penetrating through both sides of the cover 1 is arranged along the axial direction of the cover 1, and a limiting structure and an elastic telescopic mechanism matched with the limiting structure are arranged in the accommodating cavity 11, wherein the limiting structure comprises limiting grooves 113 and limiting portions aa alternately arranged along the circumferential direction of the accommodating cavity 11, and the elastic telescopic mechanism comprises a push rod 2 and a rotor 3 matched with each other, wherein the push rod 2 and the limiting groove 113 are matched to perform axial movement in the accommodating cavity 11, and one end of the push rod 2 extends from one end of the accommodating cavity 11 as a force-applying portion 21, and the rotor 3 is rotated. One end of the rotor 3 serves as a connecting end 32 and is rotatably connected to the base 4 through the other end of the accommodating chamber 11. The other end of the push rod 2 cooperates with the other end of the rotor 3 to drive the rotor 3 to rotate and move axially. During the movement, the rotor 3 alternately cooperates with the limiting groove 113 and the limiting part aa to make the elastic telescopic mechanism perform axial telescopic movement in the accommodating chamber 11. During the movement of the elastic telescopic mechanism, the elastic connecting member 5 drives the base 4 and the conductive member 6 to move toward or away from the cover shell 1. When the rotor 3 cooperates with the limiting part aa, the elastic telescopic mechanism extends to make the base 4 and the conductive member 6 move away from the cover shell 1. When the rotor 3 cooperates with the limiting groove 113, the elastic telescopic mechanism shortens to make the base 4 and the conductive member 6 move toward the cover shell 1.

[0040] A circuit breaker and a circuit board power-off device thereof of the present invention enable a base 4 and a conductive member 6 to approach or move away from a circuit board 8 through an axial telescopic movement of an elastic telescopic mechanism inside the circuit board power-off device and the cooperation of an elastic connector 5, thereby realizing power-off of the circuit board 8. When performing a withstand voltage test on the circuit breaker, there is no need to remove the circuit board 8, which is convenient to operate and helps to improve work efficiency.

[0041] Combination Figure 1-14 An embodiment is provided, a power-taking-off device for a circuit board of a circuit breaker, comprising a base 4 and a cover 1, wherein a conductive member 6 for connecting to a circuit board 8 of the circuit breaker is arranged on one side of the base 4, and the other side of the base 4 is connected to the cover 1 through an elastic connector 5, and an accommodating cavity 11 penetrating through both sides of the cover 1 is arranged along the axial direction of the cover 1, and a limiting structure and an elastic telescopic mechanism are arranged in the accommodating cavity 11, wherein the limiting structure comprises limiting grooves 113 and limiting portions aa alternately arranged along the circumferential direction of the accommodating cavity 11, and in the axial direction of the cover 1, the limiting portion aa is closer to the base 4 than the bottom surface of the limiting groove 113, and the elastic telescopic mechanism can perform axial telescopic movement in the accommodating cavity 11 with the cooperation of the limiting structure, and both ends of the elastic telescopic mechanism can extend out of the accommodating cavity 11, wherein the end close to the base 4 is rotatably connected to the base 4 as a connecting end 32, and of course, a structure in which the end as the connecting end 32 is located in the accommodating cavity 11 and can still realize rotatable connection can also be applied. Preferably, the elastic telescopic mechanism includes a push rod 2 and a rotor 3, and the push rod 2 and the rotor 3 cooperate with each other to realize the axial movement of the elastic telescopic mechanism in the accommodating chamber 11, wherein one end of the push rod 2 extends from one end of the accommodating chamber 11 as a force-applying portion 21, and the push rod 2 can be made to move axially in the accommodating chamber 11 by applying force to the force-applying portion 21, and one end of the rotor 3 is rotatably connected to the base 4 through the other end of the accommodating chamber 11 as a connecting end 32, and the other end of the push rod 2 and the other end of the rotor 3 cooperate with each other to drive the rotor 3 to rotate and move axially, and the movement of the rotor 3 includes axial movement and circumferential rotation along a single direction, and when the rotor 3 performs circular rotation During the circumferential rotation, the rotor 3 is alternately matched with the limit groove 113 and the limit part aa to stop the rotor 3 from rotating and limit the axial position of the rotor 3, thereby making the elastic telescopic mechanism perform axial telescopic movement in the accommodating chamber 11, and the elastic connecting member 5 drives the base 4 and the conductive member 6 to move toward or away from the housing 1 during the movement of the elastic telescopic mechanism. When the rotor 3 is limitedly matched with the limit part aa, the elastic telescopic mechanism is extended to make the base 4 and the conductive member 6 move away from the housing 1, and when the rotor 3 is matched with the limit groove 113, the elastic telescopic mechanism is shortened to make the base 4 and the conductive member 6 move toward the housing 1. It should be pointed out that the axial movement of the push rod 2 and the rotor 3 is reciprocating movement, and the circular movement of the rotor 3 is in a single direction, which can be clockwise rotation or counterclockwise rotation.

[0042] One end of the push rod 2 serves as a force-applying portion 21 extending out of the accommodating cavity 11, and the other end of the push rod 2 is provided with a retraction hole 23. The push rod 2 is provided with a first matching portion 22 and a first action portion that can move in the limiting groove 113. The first matching portion 22 cooperates with the limiting groove 113 to enable the push rod 2 to move axially in the accommodating cavity 11, and the first action portion is used to drive the rotor 3 to move.

[0043] The rotor 3 is located between the push rod 2 and the base 4, and one end of the rotor 3 serves as a retracted end 31, which extends into the retracted hole 23 and slides axially. As the retracted end 31 cooperates with the retracted hole 23, the elastic telescopic mechanism generates axial telescopic movement, and the other end of the rotor 3 serves as a connecting end 32 and is rotatably connected to the base 4; a second acting portion and a second matching portion 33 that can extend into the limiting groove 113 are provided on the side wall of the rotor 3, and the second acting portion and the second matching portion 33 can move in the limiting groove 113. The second acting portion and the first acting portion cooperate to enable the rotor 3 to generate bidirectional axial movement and unidirectional circular rotation. The first acting portion drives the rotor 3 to move axially, which can make the retracted end 31 move in the direction of extending into the retracted hole 23 or move out of the retracted hole 23 to realize the axial telescopic movement of the elastic telescopic mechanism; the second matching portion 33 can alternately The limiting cooperation with the limiting groove 113 and the limiting part aa is used to limit the circumferential rotation of the rotor 3 and limit the axial movement of the rotor 3 in the direction of the push rod 2 to extend into the retraction hole 23, that is, when the elastic telescopic mechanism performs telescopic movement, the second matching part 33 of the rotor 3 periodically cooperates with a limiting groove 113, the limiting part aa, the adjacent limiting groove 113, and the adjacent limiting part aa in sequence. When the second matching part 33 cooperates with the limiting groove 113, the retraction end 31 of the rotor 3 extends more into the retraction hole 23, so that the elastic telescopic mechanism is shortened, and the elastic connecting member 5 drives the base 4 and the conductive member 6 to move in the direction close to the cover shell 1. When the second matching part 33 cooperates with the limiting part aa, the retraction end 31 of the rotor 3 extends less into the retraction hole 23, the elastic telescopic mechanism is extended, and the driving base 4 and the conductive member 6 overcome the force of the elastic connecting member 5 and move in the direction away from the cover shell 1.

[0044] By pressing the force-applying portion 21 of the push rod 2, the second acting portion cooperates with the first acting portion to drive the rotor 3 to generate axial movement and unidirectional circular rotation, so that the second matching portion 33 of the rotor 3 and the limiting portion aa are released from the limiting cooperation, so that the second matching portion 33 and the second acting portion are transferred into the limiting groove 113 as the rotor 3 rotates, and one side wall of the second matching portion 33 contacts one side wall of the limiting groove 113 so that the rotor 3 can only make axial movement in the limiting groove 113, and the elastic connecting member 5 drives the base 4 and the conductive member 6, and the rotor 3 to move axially toward the direction close to the cover shell 1 until the second matching portion 33 and the bottom surface of the limiting groove 113 are limited. At this time, the second acting portion and The first acting portion located in the limiting groove 113 contacts and cooperates; the force-applying portion 21 of the push rod 2 is pressed again, and the second acting portion cooperates with the first acting portion to drive the rotor 3 to produce axial movement and circumferential rotation in a single direction, and the second matching portion 33 releases the limiting cooperation with the limiting groove 113, and the base 4, the conductive member 6, and the rotor 3 are driven to move in the direction away from the cover shell 1, and the second acting portion cooperates with the first acting portion located in the limiting groove 113 to move the rotor 3, and the second matching portion 33 cooperates with the limiting portion aa on one side of the limiting groove 113 to stop the circumferential rotation of the rotor 3, and the limiting portion aa limits the rotor 3 from moving in the direction of extending into the retraction hole 23.

[0045] Combination Figure 1-8 A matching structure of a cover shell 1, an elastic telescopic mechanism and a base 4 is provided, wherein an accommodating chamber 11 for movement of a push rod 2 and a rotor 3 is preferably cylindrical, and a plurality of axial limiting grooves 113 are provided on the upper portion of the inner side wall of the accommodating chamber 11, and the plurality of limiting grooves 113 are arranged equidistantly along the circumferential direction of the accommodating chamber 11, and a limiting portion aa is provided on the same side of each limiting groove 113 and at one end close to the base 4, and the limiting portion aa is closer to the base 4 than the bottom surface of the limiting groove 113, and the limiting portion aa is a serrated oblique end surface facing the base 4, and preferably the serrated oblique end surface includes a first sliding surface 111a and a second sliding surface 112a having the same inclination direction.

[0046] Specifically, Figure 2-4As shown, the limiting structure includes a plurality of first strip protrusions 111 protruding from the upper portion of the inner wall of the accommodating cavity 11, and the plurality of first strip protrusions 111 are equidistantly spaced along the circumferential direction of the accommodating cavity 11, each first strip protrusion 111 is axially arranged along the accommodating cavity 11 and is provided with a limiting portion aa on the same side of an end face of an end close to the base 4, and a limiting groove 113 is formed between two adjacent first strip protrusions 111, and the limiting groove 113 is used to cooperate with the elastic telescopic mechanism to enable the elastic telescopic mechanism to perform axial telescopic movement in the accommodating cavity 11. A plurality of first strip-shaped protrusions 111 form a plurality of limiting grooves 113 in the accommodating cavity 11, and the end surface of the limiting groove 113 close to one end of the base 4 is set as a first sliding surface 111a and an inclined end surface, and a second strip-shaped protrusion 112 is protruded on the same side of each limiting groove 113, and the end surface of the second strip-shaped protrusion 112 close to one end of the base 4 is set as a second sliding surface 112a and an inclined end surface, and the first sliding surface 111a is connected to the second sliding surface 112a to form a sawtooth-shaped limiting portion aa.

[0047] like Figure 5 As shown, a plurality of first matching parts 22 for matching with the limiting groove 113 are protruded from the outer wall of the push rod 2. The first matching parts 22 are arranged at equal intervals along the circumferential direction of the push rod 2. Preferably, the circumferential width of the first matching parts 22 is equal to the circumferential width of the limiting groove 113. When the push rod 2 moves axially in the accommodating cavity 11, the side walls of the first matching parts 22 fit with the side walls of the limiting groove 113. The number of the first action parts is equal to the number of the first matching parts 22, and the first action parts correspond to the first matching parts 22 and are protruded at one end of the push rod 2 close to the base 4. The first action parts include a first boss 24 and a second boss 25 protruding toward the base 4. The first boss 24 is used to drive the rotor 3 to move axially and rotate circumferentially in a single direction. The end surface of the first boss 24 facing the base 4 is used as a third sliding surface 241 for slidingly matching with the rotor 3. Preferably, the third sliding surface 241 is an inclined surface with a high middle part and low sides. The second boss 25 is located outside the first boss 24, and one end surface of the second boss 25 facing the base 4 is used as a fourth sliding surface 251 to slide with the rotor 3, and is used to drive the rotor 3 to make axial movement and unidirectional circumferential rotation. Preferably, the second boss 25 can be arranged at the lower part of the first matching portion 22 to avoid setting too many protruding structures on the push rod 2 and reduce the space occupied by the push rod 2. It should be noted that the push rod 2 can only make axial movement under the cooperation of the limiting groove 113, and cannot make circumferential rotation.

[0048] like Figure 6As shown, a plurality of second matching portions 33 and second action portions are protruded from the outer side wall of the rotor 3. Preferably, the second matching portions 33 are equidistantly spaced along the circumferential direction of the rotor 3. When the retracted end 31 moves toward the direction of extending into the retracted hole 23, the second matching portion 33 releases the limiting cooperation with the limiting portion aa and enters the limiting groove 113. The single-side side wall of the second matching portion 33 is limitedly cooperated with the side wall of the limiting groove 113, so that the rotor 3 stops rotating and can only make axial movement. Preferably, the circumferential width of the second matching portion 33 is smaller than the circumferential width of the limiting groove 113. When the rotor 3 is driven, the second matching portion 33 is separated from the side wall of the limiting groove 113 to release the limiting cooperation between the two.

[0049] Specifically, the outer end surface of the second matching portion 33 away from the end of the base 4 serves as the fifth sliding surface 331. When the retracted end 31 moves out of the retracted hole 23, the second matching portion 33 moves out of the limiting groove 113, the second matching portion 33 and the limiting groove 113 are released from the limiting matching, and the fifth sliding surface 331 cooperates with the limiting portion aa to stop the rotation of the rotor 3. The number of the second action portions is equal to the number of the second matching portions 33, and the second action portions and the second matching portions 33 are correspondingly arranged on the outer wall of the rotor 3. Preferably, the second matching portion 33 and the second action portion are an integrated structure to reduce the excessive protrusion structure arranged on the rotor 3. The second acting portion includes a sixth sliding surface 332 and a fifth sliding surface 331. The sixth sliding surface 332 is the inner end surface of the second acting portion away from the base 4. The sixth sliding surface 332 cooperates with the third sliding surface 241 to drive the rotor 3 to move axially and rotate circumferentially in a single direction. The fifth sliding surface 331 cooperates with the fourth sliding surface 251 to drive the rotor 3 to move axially and rotate circumferentially in a single direction.

[0050] like Figure 10-13 As shown, the elastic telescopic mechanism also includes a compression spring 7, which is arranged in the accommodating cavity 11. The compression spring 7 is sleeved on the push rod 2 between the first matching portion 22 and the force-applying portion 21. One end of the compression spring 7 is fixed to the cover shell 1, and the other end of the compression spring 7 is connected to the first matching portion 22 of the push rod 2. When the elastic telescopic mechanism performs axial movement, the compression spring 7 is used to provide an elastic driving force for the push rod 2.

[0051] like Figure 1-4 As shown in Figures 7 and 8, a first connecting portion 14 is provided on the outer side of the upper portion of the cover shell 1, and a second connecting portion 44 is provided on the side of the base 4 close to the cover shell 1. The two ends of the elastic connecting member 5 are respectively connected to the first connecting portion 14 and the second connecting portion 44. When the elastic telescopic mechanism performs axial telescopic movement, the elastic connecting member 5 drives the base 4 to move closer to or away from the cover shell 1. In the present application, the elastic connecting member 5 is preferably a spring.

[0052] like Figure 2-4As shown in , 8 and 9, the side wall of the housing 1 below the accommodating cavity 11 is preferably provided with an open groove 13 with the opening facing downward, and the base 4 is provided with a connecting rod 43 that matches the open groove 13. When the elastic telescopic mechanism performs axial telescopic movement, the connecting rod 43 can slide in the open groove 13 to match the base 4 to move closer to or away from the housing 1. Such a structure can further enable the base 4 to be closer to the housing 1, and the conductive member 6 to be further away from the circuit board 8, while reducing the space occupied by the movement of the base 4. A connecting ear plate 15 for fixing is provided on the outer side of the middle part of the housing 1, and the connecting ear plate 15 can fix the entire device inside the circuit breaker.

[0053] The movement process of the device is as follows: in the initial state, the fifth sliding surface 331 of the rotor 3 cooperates with the limiting portion aa, that is, the fifth sliding surface 331 cooperates with the second sliding surface 112a. Since the first sliding surface 111a and the second sliding surface 112a are inclined toward the same side, the fifth sliding surface 331 is limited when cooperating with the second sliding surface 112a, and cannot slide relatively along the second sliding surface 112a. At the same time, the fifth sliding surface 331 contacts the fourth sliding surface 251 of the push rod 2. At this time, the sixth sliding surface 332 of the rotor 3 cannot contact the third sliding surface 241 of the push rod 2. At this time, the conductive member 6 of the base 4 contacts the circuit board 8, so that the circuit board 8 can draw electricity normally.

[0054] When it is necessary to close the device, force is applied to the force-applying portion 21, and the second boss 25 of the push rod 2 moves axially downward with the push rod 2. At this time, the interaction force between the fourth sliding surface 251 and the fifth sliding surface 331 causes the rotor 3 to generate an axial driving force. Under the action of this axial driving force, the fifth sliding surface 331 meshes with the fourth sliding surface 251 and moves downward together to separate from the second sliding surface 112a and release the limit fit. When the fourth sliding surface 251 drops to coincide with the first sliding surface 111a, the fourth sliding surface 251 of the first boss 24 cooperates with the fifth sliding surface 331 of the rotor 3 to slide relative to each other, generating a driving force that causes the rotor 3 to move axially and rotate circumferentially in a single direction. As the rotor 3 rotates circumferentially, the fifth sliding surface 331 changes from a state of being in contact with the second sliding surface 112a to being in contact with the first sliding surface 111a. The fifth sliding surface 331 The cam 31 slides relatively along the first sliding surface 111a so that the fifth sliding surface 331 enters the limiting groove 113 adjacent to the limiting portion aa. At this time, the second matching portion 33 and the second action portion corresponding to the second matching portion 33 enter the limiting groove 113 at the same time. Subsequently, one side wall of the second matching portion 33 cooperates with one side wall of the limiting groove 113 to stop the rotation of the rotor 3. At this time, the sixth sliding surface 332 cooperates with the third sliding surface 241 located in the limiting groove 113. The retracted end 31 of the rotor 3 extends into the retracted hole 23 of the push rod 2 and pushes the push rod 2 to move axially, thereby realizing the axial contraction movement of the elastic telescopic mechanism. Under the action of the elastic connecting member 5, the base 4 and the conductive member 6 move in the direction close to the cover shell 1, so that the conductive member 6 is away from the circuit board 8, thereby realizing the power-off of the circuit board 8. At this time, the compression spring 7 sleeved on the push rod 2 is compressed (see Fig.11 ).

[0055] When it is necessary to restore the power supply of the device, the second boss 25 of the push rod 2 moves axially downward along with the push rod 2 by applying force to the force applying part 21. At this time, the interaction force between the third sliding surface 241 and the sixth sliding surface 332 causes the rotor 3 to generate an axial driving force. Under the action of this axial driving force, the sixth sliding surface 332 meshes with the third sliding surface 241 and moves downward together. When the fifth sliding surface 331 drops to coincide with the second sliding surface 112a, the third sliding surface 241 of the first boss 24 and the sixth sliding surface 332 of the rotor 3 slide relative to each other, causing the rotor 3 to generate axial movement and a driving force for circumferential rotation in a single direction. Since the rotor 3 makes a single The fifth sliding surface 331 is limited by the limiting portion aa between the limiting groove 113 and the next limiting groove 113 under the action of the driving force of the axial downward movement and the driving force of the circumferential rotation, that is, the fifth sliding surface 331 cooperates with the second sliding surface 112a to stop the rotation of the rotor 3. At this time, the retracted end 31 of the rotor 3 moves out of the retracted hole 23 to realize the stretching movement of the elastic telescopic mechanism. Under the action of the elastic connecting member 5, the base 4 and the conductive member 6 move in a direction away from the cover 1, that is, the conductive member 6 contacts the circuit board 8, the circuit board 8 resumes the power-taking state, and the compression spring 7 also resumes to the initial state (see Fig.12 ).

[0056] Combination Figure 1-4 The specific structure of the cover shell 1 is provided. The cover shell 1 is a hollow cylinder with one end closed and the other end open. A central hole 12 is provided in the middle of the closed end of the cover shell 1 for allowing the force-applying part 21 of the elastic telescopic mechanism to pass through. The open end of the cover shell 1 is used to allow the connecting end 32 of the elastic telescopic mechanism to be rotatably connected to the base 4. The hollow part in the middle of the cover shell 1 serves as a accommodating chamber 11. A limiting groove 113 and a limiting portion aa are provided at the upper portion of the accommodating cavity 11. The number of the limiting grooves 113 is multiple, and the multiple limiting grooves 113 are arranged at equal intervals along the circumferential direction of the accommodating cavity 11, and the limiting portion aa is provided on the same side of the limiting groove 113 close to one end of the base 4. Preferably, the limiting portion aa includes a first sliding surface 111a and a second sliding surface 112a. The first sliding surface 111a and the second sliding surface 112a are oblique end surfaces inclined to the same side. The first sliding surface 111a and the second sliding surface 112a are inclined in a direction that facilitates the rotor 3 to enter the limiting groove 113. Figure 2-4 In the embodiment, the first sliding surface 111a and the second sliding surface 112a are both inclined toward the upper right direction, so that when the rotor 3 rotates clockwise, the second matching portion 33 and the second action portion of the rotor 3 can enter the limiting groove 113. Figure 2-4, four opening grooves 13 are provided on the side wall of the housing 1 below the accommodating cavity 11, and the opening grooves 13 are arranged at equal intervals along the circumference of the housing 1. The opening grooves 13 are used to cooperate with the connecting rods 43 of the base 4, so that the connecting rods 43 of the base 4 stop moving when they touch the bottom of the opening grooves 13. Of course, the number of the opening grooves 13 can also be two, three or more, and the respective situations can be symmetrical or asymmetrical. A pair of protruding structures as the first connecting parts 14 are protruded on the outer side of the upper part of the housing 1. The first connecting part 14 and the opening grooves 13 are located on the same side of the housing 1, and a groove connected to the elastic connecting member 5 is provided on the first connecting part 14; a pair of connecting ear plates 15 are protruded on the outer side of the middle part of the housing 1, and the connecting ear plates 15 are preferably arranged above the opening grooves 13 to avoid the connecting ear plates 15 interfering with the movement of the base 4.

[0057] Combination Figure 5 A specific structure of a push rod 2 is provided, wherein the push rod 2 is a hollow cylinder with one end closed and the other end open. The closed end of the push rod 2 serves as a force-applying portion 21, and the hollow portion in the middle of the push rod 2 serves as a retracted hole 23. A plurality of protruding structures serving as first matching portions 22 are protruded from the outer wall of the push rod 2. The plurality of first matching portions 22 are arranged at equal intervals along the circumferential direction of the push rod 2. The first matching portions 22 are used to slide in the limiting groove 113. A protruding structure serving as a second boss 25 is provided on the end surface of the first matching portion 22 close to the base 4. Figure 5 As shown, the second boss 25 is arranged at the edge of the first matching portion 22, and the end surface of the second boss 25 close to the base 4 serves as the fourth sliding surface 251; a protruding structure serving as the first boss 24 is protruded from the end surface of the push rod 2 close to the base 4, and the protruding height of the first boss 24 is less than the protruding height of the second boss 25, and the end surface of the first boss 24 close to the base 4 serves as the third sliding surface 241, and the third sliding surface 241 is preferably an inclined surface with a high middle and gradually low sides, as shown in FIG. Figure 5 As shown, the second boss 25 is located on one side of the first boss 24, and the fourth sliding surface 251 disposed on the second boss 25 deviates from the middle of the third sliding surface 241. When the sixth sliding surface 332 slides relative to the third sliding surface 241, the sixth sliding surface 332 slides to the middle of the third sliding surface 241 and can be separated from the third sliding surface 241, so that the rotor 3 generates a single-direction circular rotation. The fourth sliding surface 251 is lower than the third sliding surface 241 in the figure, so that when the third sliding surface 241 cooperates with the sixth sliding surface 332, the fourth sliding surface 251 and the fifth sliding surface 331 cannot cooperate with each other. It should be noted that the first boss 24 and the second boss 25 together constitute a first action portion for cooperating with the rotor 3.

[0058] Combination Figure 6A specific structure of a rotor 3 is provided, wherein the rotor 3 is a rod body structure, one end of the rotor 3 serves as a retracted end 31 for extending into the retracted hole 23 of the push rod 2, and the other end of the rotor 3 serves as a connecting end 32 for rotatably cooperating with the base 4. Preferably, the outer diameter of the retracted end 31 of the rotor 3 is smaller than the outer diameter of the connecting end 32, so that the rotor 3 will not completely extend into the retracted hole 23 of the push rod 2, and a connecting hole 34 is provided on the end face of the connecting end 32, and the connecting hole 34 is used for rotatably cooperating with the base 4. A plurality of plate-shaped second matching parts 33 are arranged on the outer side wall near the connecting end 32 of the rotor 3. The plurality of second matching parts 33 are arranged equidistantly along the circumferential direction of the rotor 3. Each second matching part 33 is arranged to protrude radially along the rotor 3. The outer diameter of the second matching part 33 is preferably less than or equal to the inner diameter of the accommodating cavity 11, and the outer diameter of the second matching part 33 is greater than the inner diameter of the limiting part aa. The end surface of the second matching part 33 away from the connecting end 32 serves as the second action part. The second action part is a stepped surface with a higher inner side and a lower outer side. The second action part includes a higher sixth sliding surface 332 and a lower fifth sliding surface 331, and the fifth sliding surface 331 and the sixth sliding surface 332 are The moving surfaces 332 are all inclined surfaces with one side higher than the other side, and the inner side higher than the outer side. The inner side of the fifth sliding surface 331 is higher than the outer side, and is used to cooperate with the fourth sliding surface 251 to slide and generate a driving force for axial movement. The inclined surface with one side higher than the other side of the fifth sliding surface 331 is used to cooperate with the first sliding surface 111a or the second sliding surface 112a of the limiting portion aa. When the fifth sliding surface 331 cooperates with the second sliding surface 112a, the second matching portion 33 is limited and the rotor 3 stops rotating in a circular manner. When the fifth sliding surface 331 cooperates with the first sliding surface 111a to produce relative sliding, the second matching portion 33 enters the limiting groove 113 and the rotor 3 stops rotating. The sixth sliding surface 332 is higher than the inner side and is used to cooperate with the third sliding surface 241, and when the two slide relative to each other, the rotor 3 generates a driving force for axial movement. The sixth sliding surface 332 is higher than the inner side and is used to cooperate with the third sliding surface 241, and when the two slide relative to each other, the rotor 3 generates a driving force for circumferential rotation.

[0059] Combination Figure 7-8A specific structure of a base 4 is provided, wherein the base 4 is a plate-like structure having a cross-sectional area larger than that of the connecting end 32, and a columnar body 41 for rotationally connecting to the connecting end 32 is protruded from the middle of one side of the base 4, and the columnar body 41 can rotationally cooperate with the connecting hole 34 on the connecting end 32. An annular groove 42 is arranged around the outer periphery of the columnar body 41 and passes through both sides of the base 4, and the annular groove 42 can be slid through by the lower part of the cover shell 1. With the cooperation of the annular groove 42, the base 4 can move axially along the outer wall of the cover shell 1, thereby increasing the range of motion of the base 4, facilitating increasing the distance between the conductive part 6 and the circuit board 8, and improving the power-off effect of the circuit board 8. Preferably, a connecting rod 43 is radially arranged in the annular groove 42, and the connecting rod 43 can slide and cooperate with the opening groove 13 arranged at the lower part of the cover shell 1, such as Figure 7 , 8 As shown, four connecting rods 43 are arranged on the base 4, and the four connecting rods 43 are symmetrically arranged in the annular groove 42 so that the annular groove 42 is divided into four arc grooves. The connecting rods 43 and the opening groove 13 can provide a guiding effect for the movement of the base 4, preventing the base 4 from generating relative circumferential rotation when the base 4 moves along the cover 1, so that the conductive member 6 on the base 4 and the power access point of the circuit board 8 are misaligned due to the circumferential rotation, resulting in poor matching. A pair of protruding structures as second connecting parts 44 are arranged oppositely on the outside of the annular groove 42, and the two second connecting parts 44 are arranged oppositely and a groove structure for connecting the elastic connecting member 5 is provided on each second connecting part 44; preferably, a rectangular protrusion 62 for connecting with the conductive member 6 is protruded in the middle of the other side of the base 4, and of course, other shapes of protruding structures can also be used to connect with the conductive member 6, or the conductive member 6 can be fixed to the base 4 by screws or the like.

[0060] like Fig. 9 , 11 As shown in Figure 12, the conductive member 6 connected to the base 4 is preferably formed integrally of an elastic metal material, the middle part of the conductive member 6 is used to be fixedly connected to the base 4, and the two ends of the conductive member 6 are respectively used as conductive parts 61 for connecting to the circuit board 8 of the circuit breaker, and the two conductive parts 61 are respectively inclined in the direction away from the base 4. By applying pressure to the conductive member 6, the conductive member 6 can be elastically deformed, and when the base 4 moves in the direction away from the cover 1, that is, the base 4 moves in the direction close to the circuit board 8, the base 4 and the circuit board 8 are squeezed to deform the conductive part 61 and the circuit of the circuit board 8 is connected. At this time, the withstand voltage test cannot be performed; when the base 4 moves in the direction close to the cover 1, that is, the base 4 moves in the direction away from the circuit board 8, the circuit board 8 and the base 4 remove the squeezing of the conductive part 61, the circuit of the circuit board 8 is disconnected, and the conductive part 61 returns to its original state. At this time, the circuit breaker can be subjected to a withstand voltage test.

[0061] A circuit breaker provided with the device comprises a housing and a circuit board 8 arranged in the housing. Preferably, the housing comprises an upper cover and a base. The device is fixed in the housing, and its force-applying portion 21 extends out of the upper cover and is located outside the housing. Its base 4 is located above the circuit board 8, and the conductive member 6 cooperates with the power access point of the circuit board 8. Preferably, screws are assembled in the connection ear plate 15 of the device, and the device is installed in the housing of the circuit breaker by screws (see Fig.14 ).

[0062] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A power-off device for a circuit breaker circuit board, characterized in that: The invention comprises a base (4) and a cover shell (1), wherein a conductive member (6) for connecting to a circuit board (8) of a circuit breaker is arranged on one side of the base (4), and the other side of the base (4) is connected to the cover shell (1) via an elastic connecting member (5). A receiving cavity (11) penetrating through both sides of the cover shell (1) is arranged along the axial direction of the cover shell (1), and a limiting structure and an elastic telescopic mechanism matched with the limiting structure are arranged in the receiving cavity (11). The limiting structure comprises limiting grooves (113) and limiting portions (aa) alternately arranged in the circumferential direction of the receiving cavity (11), and the elastic telescopic mechanism comprises a push rod (2) and a rotor (3) matched with each other, and the push rod (2) and the limiting groove (113) are matched to perform axial movement in the receiving cavity (11), and one end of the push rod (2) extends out from one end of the receiving cavity (11) as a force-applying portion (21). One end of the rotor (3) serves as a connection end (32) and is rotatably connected to the base (4) through the other end of the accommodating cavity (11); the other end of the push rod (2) cooperates with the other end of the rotor (3) to drive the rotor (3) to move; the movement of the rotor (3) includes axial movement and circumferential rotation along a single direction; during the circumferential rotation of the rotor (3), the rotor (3) alternately cooperates with the limiting groove (113) and the limiting portion (aa) to stop the rotation of the rotor (3) and limit the axial position of the rotor (3); when the rotor (3) cooperates with the limiting portion (aa), the elastic telescopic mechanism extends to cause the base (4) and the conductive member (6) to move in a direction away from the housing (1); and when the rotor (3) cooperates with the limiting groove (113), the elastic telescopic mechanism shortens to cause the base (4) and the conductive member (6) to move in a direction close to the housing (1); A retracted hole (23) is provided at the other end of the push rod (2), and a first matching portion (22) and a first action portion that can move in the limiting groove (113) are provided on the push rod (2); the first matching portion (22) cooperates with the limiting groove (113) to enable the push rod (2) to move axially in the accommodating cavity (11), and the first action portion is used to drive the rotor (3) to move; The other end of the rotor (3) is used as a retracted end (31) for cooperating with the retracted hole (23) of the push rod (2). A second action portion and a second matching portion (33) are provided on the side wall of the rotor (3). The second action portion cooperates with the first action portion to enable the rotor (3) to generate axial movement and unidirectional circumferential rotation. The first action portion drives the rotor (3) to move axially so that the retracted end (31) moves in a direction extending into the retracted hole (23) or moves out of the retracted hole (23) to realize the axial telescopic movement of the elastic telescopic mechanism. The second matching portion (33) can alternately cooperate with the limiting groove (113) and the limiting portion (aa) to limit the circumferential rotation of the rotor (3), and the limiting rotor (3) moves axially in the direction of the push rod (2) and extends into the retracted hole (23).

2. The power-off device for a circuit breaker circuit board according to claim 1, characterized in that: A plurality of axial limiting grooves (113) are provided on the upper part of the inner side wall of the accommodating cavity (11), and the plurality of limiting grooves (113) are arranged at equal intervals along the circumferential direction of the accommodating cavity (11), and a limiting portion (aa) is provided on the same side of each limiting groove (113) and at one end close to the base (4), and the limiting portion (aa) is a sawtooth-shaped oblique end surface facing the base (4); The push rod (2) is provided with a plurality of corresponding first matching parts (22) and first action parts. The plurality of first matching parts (22) are arranged on the outer wall of the push rod (2) at equal intervals along the circumferential direction of the push rod (2). The plurality of first action parts are protrudingly arranged at one end of the push rod (2) close to the base (4). The first action part comprises a first boss (24) and a second boss (25) protrudingly arranged in the direction of the base (4). The first boss (24) is used to drive the rotor (3) to perform axial movement and circumferential rotation in a single direction. The end surface of the first boss (24) facing the base (4) serves as a third sliding surface (241) for slidingly matching with the rotor (3); the second boss (25) is located on the outer side of the first boss (24), and the end surface of the second boss (25) facing the base (4) serves as a fourth sliding surface (251) for slidingly matching with the rotor (3); A plurality of second matching parts (33) and second action parts corresponding to each other are protruded from the outer wall of the rotor (3); when the retracted end (31) moves in a direction extending into the retracted hole (23), a single side wall of the second matching part (33) and a side wall of the limiting groove (113) are limitedly matched to make the rotor (3) move only axially; an outer end surface of the second matching part (33) away from the base (4) serves as a fifth sliding surface (331); when the retracted end (31) moves in a direction moving out of the retracted hole (23), the second matching part (33) rotates with the rotor (3) to make the fifth sliding surface (331) The moving surface (331) cooperates with the limiting portion (aa) to stop the rotor (3) from rotating; the second action portion comprises a sixth sliding surface (332) and a fifth sliding surface (331); the sixth sliding surface (332) is the inner end surface of the second matching portion (33) away from the end of the base (4); the sixth sliding surface (332) cooperates with the third sliding surface (241) to drive the rotor (3) to move axially and rotate circumferentially in a single direction; the fifth sliding surface (331) cooperates with the fourth sliding surface (251) to drive the rotor (3) to move axially and rotate circumferentially in a single direction.

3. A power-off device for a circuit breaker circuit board according to claim 1 or 2, characterized in that: The annular width of the first matching portion (22) is equal to the annular width of the limiting groove (113), and the annular width of the second matching portion (33) is smaller than the annular width of the limiting groove (113).

4. A power-off device for a circuit breaker circuit board according to claim 1 or 2, characterized in that: The elastic telescopic mechanism also includes a compression spring (7), which is arranged in the accommodating cavity (11) and sleeved on the push rod (2) between the first matching portion (22) and the force-applying portion (21) to provide an elastic driving force for the push rod (2).

5. The power-off device for a circuit breaker circuit board according to claim 1, characterized in that: The limiting structure comprises a plurality of first strip-shaped protrusions (111) protruding from the upper portion of the inner side wall of the accommodating cavity (11), the plurality of first strip-shaped protrusions (111) being arranged at equal intervals along the circumferential direction of the accommodating cavity (11), each first strip-shaped protrusion (111) being arranged along the axial direction of the accommodating cavity (11) and having a limiting portion (aa) on the same side of an end surface close to the base (4), and a limiting groove (113) being formed between two adjacent first strip-shaped protrusions (111).

6. A power-off device for a circuit breaker circuit board according to claim 1 or 5, characterized in that: The limiting structure comprises a plurality of limiting grooves (113), the end surface of the limiting groove (113) close to one end of the base (4) is set as a first sliding surface (111a) and is an inclined end surface, a second strip protrusion (112) is protrudingly provided on the same side in each limiting groove (113), the end surface of the second strip protrusion (112) close to one end of the base (4) is set as a second sliding surface (112a) and is an inclined end surface, and the first sliding surface (111a) and the second sliding surface (112a) are connected to form a sawtooth-shaped limiting portion (aa).

7. The power-off device for a circuit breaker circuit board according to claim 1, characterized in that: An opening groove (13) with its opening facing downward is provided on the side wall of the cover shell (1) at the lower part of the accommodating cavity (11), and a connecting rod (43) matching with the opening groove (13) is provided on the base (4). When the elastic telescopic mechanism performs axial telescopic movement, the connecting rod (43) can slide and match in the opening groove (13) to allow the base (4) to move toward or away from the cover shell (1).

8. The power-off device for a circuit breaker circuit board according to claim 1, characterized in that: A first connecting portion (14) is arranged on the outer side of the upper portion of the cover shell (1), a second connecting portion (44) is arranged on the side of the base (4) close to the cover shell (1), and two ends of the elastic connecting member (5) are respectively connected to the first connecting portion (14) and the second connecting portion (44); and a connecting ear plate (15) for fixing is arranged on the outer side of the middle portion of the cover shell (1).

9. A power-off device for a circuit breaker circuit board according to any one of claims 1-2, characterized in that: The cover shell (1) is in the form of a hollow cylinder with one end closed and the other end open. A central hole (12) is provided in the middle of the closed end of the cover shell (1) for allowing a force-applying portion (21) of the elastic telescopic mechanism to pass through. The open end of the cover shell (1) is used to allow a connecting end (32) of the elastic telescopic mechanism to be rotatably connected to a base (4). The hollow portion in the middle of the cover shell (1) serves as a receiving chamber (11). A limiting groove (113) and a limiting portion (aa) are provided at the upper portion of the receiving chamber (11). The side wall of the cover shell (1) is provided with four opening grooves (13), and the opening grooves (13) are symmetrically arranged along the annular direction of the cover shell (1); a pair of protruding structures as first connecting parts (14) are protruded on the outer side of the upper part of the cover shell (1), the first connecting part (14) and the opening grooves (13) are located on the same side of the cover shell (1), and a groove connected to the elastic connecting member (5) is provided on the first connecting part (14); and a pair of connecting ear plates (15) are protruded on the outer side of the middle part of the cover shell (1).

10. A power-off device for a circuit breaker circuit board according to any one of claims 1-2, characterized in that: The push rod (2) is a hollow cylinder with one end closed and the other end open. The closed end of the push rod (2) serves as a force-applying portion (21), and the hollow portion in the middle of the push rod (2) serves as a retracted hole (23). A plurality of protruding structures serving as first matching portions (22) are protruding from the outer wall of the push rod (2). The plurality of first matching portions (22) are arranged at equal intervals along the circumferential direction of the push rod (2). The first matching portions (22) are used to slide in the limiting groove (113). A protruding structure serving as a second boss (25) is provided on an end surface of the first matching portion (22) close to the base (4), and the end surface of the second boss (25) close to the base (4) serves as a fourth sliding surface (251). A protruding structure serving as a first boss (24) is protruded from the end surface of the push rod (2) close to the base (4), and the protruding height of the first boss (24) is less than the protruding height of the second boss (25). The end surface of the first boss (24) close to the base (4) serves as a third sliding surface (241), and the third sliding surface (241) is an inclined surface that is high in the middle and gradually lower on both sides.

11. A power-off device for a circuit breaker circuit board according to any one of claims 1-2, characterized in that: The rotor (3) is a rod structure, one end of the rotor (3) serves as a retracted end (31), and the other end of the rotor (3) serves as a connecting end (32) for rotationally cooperating with the base (4); a plurality of plate-shaped second matching portions (33) are arranged on the outer wall close to the connecting end (32) of the rotor (3); the plurality of second matching portions (33) are arranged at equal intervals along the circumferential direction of the rotor (3); each second matching portion (33) is arranged to protrude in the radial direction of the rotor (3); an end surface of the second matching portion (33) away from the connecting end (32) serves as a second action portion; the second action portion is a stepped surface with a higher inner side and a lower outer side; the second action portion comprises a higher sixth sliding surface (332) and a lower fifth sliding surface (331); and the fifth sliding surface (331) and the sixth sliding surface (332) are both inclined surfaces with one side higher and the other side lower, and the inner side higher and the outer side lower.

12. A power-off device for a circuit breaker circuit board according to claim 11, characterized in that: The outer diameter of the connecting end (32) of the rotor (3) is greater than the outer diameter of the retracted end (31), and a connecting hole (34) is provided in the middle of the end surface of the connecting end (32), and the connecting hole (34) is used for rotationally connecting with the base (4).

13. A power-off device for a circuit breaker circuit board according to claim 1 or 7, characterized in that: The base (4) is a plate-like structure with a cross-sectional area larger than the connecting end (32). A columnar body (41) for rotatably connecting to the connecting end (32) is protruded from the middle of one side of the base (4). An annular groove (42) penetrating through both sides of the base (4) is arranged around the outer periphery of the columnar body (41). The annular groove (42) allows the lower part of the cover shell (1) to slide through. A connecting rod (43) is radially arranged in the annular groove (42). The connecting rod (43) can be slidably matched with an open groove (13) arranged at the lower part of the cover shell (1). A pair of protruding structures as second connecting parts (44) are arranged opposite to each other on the outer side of the annular groove (42), and a groove structure for connecting the elastic connecting member (5) is arranged on each second connecting part (44).

14. The power-off device for a circuit breaker circuit board according to claim 1, characterized in that: The conductive member (6) is made of an elastic metal material, the middle portion of the conductive member (6) is used for fixed connection with the base (4), the two ends of the conductive member (6) are respectively used as conductive parts (61) for connecting with the circuit board (8) of the circuit breaker, and the two conductive parts (61) are respectively inclined in a direction away from the base (4).

15. A circuit breaker, comprising a housing and a circuit board disposed in the housing, characterized in that: A power shutoff device for a circuit breaker circuit board as described in any one of claims 1 to 14 is fixedly arranged on the shell, a force-applying portion (21) of the power shutoff device for the circuit breaker circuit board extends out of the shell, and a conductive part (6) of the power shutoff device for the circuit breaker circuit board cooperates with a power access point of the circuit board (8).

Images