CN215869251U - Auxiliary contact and circuit breaker - Google Patents

Abstract

The utility model discloses an auxiliary contact and a circuit breaker, wherein two groups of wire holders and a lever group for controlling the on-off switching of the two groups of wire holders are arranged in a shell of the circuit breaker; the lever group is hinged on the shell and provided with a first touch part and a second touch part, the first touch part and the second touch part are respectively matched with a first elastic sheet of the first group of wire holders and a second elastic sheet of the second group of wire holders, and the two elastic sheets are electrically connected with corresponding second wiring terminals to be configured as follows: the lever set rotates to switch the working position and then the follow-up touch part presses against the elastic sheet to be established after deformation. By the scheme, the configuration cost can be effectively reduced, and the occupation of space can be reduced on the basis of meeting the two-way indication function of the circuit breaker.

Description

Auxiliary contact and circuit breaker

Technical Field

The utility model relates to the technical field of contact devices, in particular to an auxiliary contact and a circuit breaker.

Background

The auxiliary contact device is one of the most common electrical devices in the auxiliary units of circuit breakers. The common auxiliary contact device has a set of normally open and normally closed functions, and two auxiliary contacts are required to be configured for indicating the condition that two paths of the circuit breaker are disconnected and closed. The structure of the auxiliary contact is limited by the structure characteristics of the conventional auxiliary contact, the whole space is occupied greatly, and the configuration cost cannot be effectively controlled.

In view of the above, it is desirable to optimize the design of the auxiliary contact to overcome the above technical drawbacks.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides an auxiliary contact which can effectively reduce the configuration cost through structural optimization and can reduce the occupied space on the basis of meeting the two-way indication function of the circuit breaker.

The utility model provides an auxiliary contact, which comprises a shell, two groups of wire holders arranged in the shell, and a lever group for controlling the on-off switching of the two groups of wire holders; the lever group is hinged on the shell and can be rotationally switched between a first working position and a second working position, and the lever group is provided with a first touch part and a second touch part; two groups of wire holders are respectively arranged on two sides of the lever group; each group of the wire holders comprises three wiring terminals and an elastic sheet, one end of the elastic sheet is electrically connected with the first wiring terminal, and the other end of the elastic sheet can be selected to be electrically connected with the second wiring terminal or the third wiring terminal; the first touch part and the second touch part are respectively matched with a first elastic sheet of the first group of wire holders and a second elastic sheet of the second group of wire holders, and when the first elastic sheet is electrically connected with the corresponding second wire terminals, the first elastic sheet and the second elastic sheet are configured as follows: the first touch part which is driven by the lever set after the lever set rotates to switch the working position presses and presses the first elastic sheet to deform; when the second elastic sheet is electrically connected with the corresponding second wiring terminal, the configuration is as follows: the second touch part which is driven by the lever set after the lever set rotates to switch the working position presses and presses the second elastic sheet to deform and then is established.

Optionally, the first touching portions are two touching portions arranged at an interval, the body of the first elastic sheet is located between the two first touching portions, and the first elastic sheet is electrically connected with the corresponding second connection terminal or the corresponding third connection terminal, and is configured as: after the lever set rotates to switch the working positions, the two first touch parts which follow up press the first elastic sheet to deform respectively and then are established; the second touches the portion for two that the interval set up, the body of second shell fragment is located two between the second touches the portion, the second shell fragment and corresponding second binding post or third binding post's electric connection, dispose to: after the lever set rotates to switch the working positions, the two follow-up second touch parts respectively press and abut against the second elastic sheet to be deformed and then are established.

Optionally, the electrical connection between the first elastic piece and the corresponding second connection terminal is configured to: after the lever set is rotationally switched to the first working position, one of the two first follow-up touch parts presses the first elastic sheet along a first direction to deform, and then the first elastic sheet is established; the first elastic sheet is electrically connected with the corresponding third connecting terminal and is configured as follows: after the lever set is rotationally switched to the second working position, the lever set is established by pressing the other one of the two follow-up first touch parts against the first elastic sheet along a second direction to deform; the second elastic sheet is electrically connected with the corresponding second connecting terminal and is configured as follows: after the lever set is rotationally switched to the first working position, one of the two follow-up second touch parts presses the second elastic sheet along a first direction to deform and then is established; the second elastic sheet is electrically connected with the corresponding third connecting terminal and is configured as follows: after the lever set rotates and is switched to the second working position, the lever set is established by pressing and abutting the second elastic sheet to deform along a second direction through the other one of the two follow-up second touch parts.

Optionally, the lever set comprises a first lever and a second lever, both of which are coaxially hinged with the housing; the two first touch parts are arranged on the first lever, and the two second touch parts are arranged on the second lever.

Optionally, the device further comprises a first elastic piece arranged between the first lever and the shell, and a second elastic piece arranged between the second lever and the shell; when the lever assembly is switched to the first working position in a rotating mode, the first elastic piece and the second elastic piece deform to provide a reset acting force when the lever assembly is switched to the second working position in a rotating mode; and a circumferential limiting pair is arranged between the first lever and the second lever, and is configured as follows: when the lever set is switched to the first working position in a rotating mode, the second lever can drive the first lever to rotate through the circumferential limiting pair; when the lever set rotates and is switched to the second working position, the first lever can drive the second lever to rotate through the circumferential limiting pair.

Optionally, the multifunctional electric heating cooker also comprises a jump buckle piece, a locking piece and a handle; the jump buckle is hinged to the first position of the second lever, and a stop limiting part is arranged on the jump buckle; the locking piece is hinged to a second position of the second lever and provided with a locking end extending from the body, and the locking end can abut against a stop limiting part of the jump buckle piece so as to limit the jump buckle piece and the locking piece to rotate relative to the second lever; the handle is hinged to the shell and is in transmission connection with the jump buckle piece so as to provide driving force for the lever set to rotate to switch the working position.

Optionally, the handle further comprises a third elastic member arranged between the latch member and the second lever, and a fourth elastic member arranged between the handle and the housing; the locking piece can rotate along a first direction relative to the second lever so that the locking end is separated from the stopping limiting part, and the third elastic piece can deform to provide acting force for the locking piece to rotate and reset along a second direction; the first lever is provided with a test toggle part which can extend out of the shell; the handle is in transmission connection with the jump buckle piece through the connecting rod, and when the locking end is separated from the locking limiting part, the fourth elastic piece can provide reset acting force of the handle.

Optionally, the first elastic member is a tension spring, and the second elastic member, the third elastic member and the fourth elastic member are torsion springs.

Optionally, the two first touch portions and the two second touch portions are both in a shape of a boss protruding from the corresponding lever body; and the two first touch parts and the two second touch parts are positioned at the same side of the hinge joint position.

The utility model also provides a circuit breaker comprising an auxiliary contact as described above.

Aiming at an auxiliary contact for a circuit breaker, the scheme provides the auxiliary contact with two groups of normally open and normally closed functions, and particularly, two groups of wire holders are arranged on a shell and are respectively positioned on two sides of a lever group; the first elastic sheet of the first group of wire holders and the second elastic sheet of the second group of wire holders are used for switching the on and off of the wiring terminals in the group; the lever group is provided with two touch parts, wherein a first touch part is matched with the first elastic sheet, and a second touch part is matched with the second elastic sheet; so set up, based on the rotation switching of a lever group work position, can realize the switching operation of two sets of binding post engaged state in step. Compared with the prior art, the utility model has the following beneficial technical effects:

firstly, the scheme of application can effectively reduce the configuration cost, and can reduce the space occupation on the basis of meeting the two-way indication function of the circuit breaker.

Secondly, in an alternative of the present invention, the first touch portion and the second touch portion are two and spaced, each spring plate body is located between the two corresponding touch portions, and after the lever set rotates to switch the working position, the two follow-up touch portions respectively press the corresponding spring plates to deform, so as to establish an electrical connection between the spring plates and the second connection terminal or the third connection terminal in the set. Like this for the switching of on-state and off-state has better maneuverability, compares in and resets the mode that reaches another electric connection based on shell fragment deformation, and this alternative has simple structure, connects reliable characteristics.

Thirdly, in another alternative of the present invention, the lever set includes a first lever and a second lever, the first trigger is provided on the first lever, and the second trigger is provided on the second lever, thereby independently matching two sets of wire holder on-off controls; in addition, the system can be selectively replaced according to actual conditions during maintenance, and the maintenance cost can be effectively controlled.

Fourthly, in another alternative of the present invention, a working switching operation acting force is provided to the lever set based on the handle, the snap fastener and the locking fastener, wherein the handle is hinged to the housing, the snap fastener and the locking fastener are both hinged to the second lever, and the snap fastener and the locking fastener can abut against the stopping limiting portion to limit the rotation of the two relative to the second lever, and at this time, the working position switching function of the lever set is satisfied. Furthermore, based on the switching of the working positions, after the transmission connection relation of the handle on the transmission path is released, the test toggle part is manually operated to test the connection and disconnection conditions of the contact. Structural design is reasonable, and has better maneuverability.

Drawings

Fig. 1 is a schematic view of an embodiment of the auxiliary contact in a closed state;

FIG. 2 is a schematic diagram of an embodiment of the auxiliary contact in an open state;

FIG. 3 is a schematic structural view of two sets of wire holders shown in FIG. 1;

FIG. 4 is a schematic structural diagram of the base in an embodiment;

FIG. 5 is a schematic structural view of the cover in accordance with an embodiment;

FIG. 6 is a schematic diagram of a first lever according to an embodiment;

FIG. 7 is a schematic diagram of a second lever according to an embodiment;

fig. 8 is a schematic view showing a state of use of the handle, the link, the toggle member and the catch member according to the embodiment;

fig. 9 is a schematic view of a mating relationship between the snap-fastener component and the locking component according to the embodiment.

In the figure:

the testing device comprises a shell 10, a base 11, a cover 12, a pin 13, a fixing part 14, a lever group 20, a first lever 21, a first touch part 211, a side edge 212, a hooking protrusion 213, a second lever 22, a second touch part 221, a convex part 222, a socket part 223, a kidney-shaped hole 224, a first elastic piece 23, a second elastic piece 24, a testing toggle part 25, a first wiring terminal 31, a second wiring terminal 32, a third wiring terminal 33, a first elastic piece 3a, a second elastic piece 3b, a handle 40, a fourth elastic piece 41, a connecting rod 50, a jump buckle piece 60, a stop limiting part 61, a lock buckle piece 70, a lock end 71 and a third elastic piece 72.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

In the present embodiment, two sets of wire holders shown in the drawings are used as description objects, and the scheme of the auxiliary contact having two sets of normally open and normally closed functions is described in detail. Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a closed state of the auxiliary contact according to the present embodiment, and fig. 2 is a schematic diagram of an open state of the auxiliary contact according to the present embodiment.

This auxiliary contact includes casing 10, is provided with lever group 20 and two sets of wire holders in the casing 10: the first and second sets of wire holders a and B, as shown in fig. 1 and 2, are respectively disposed on both sides of the lever set 20.

In this embodiment, the lever set 20 is hinged to the housing 10 and can be rotated between a first working position shown in fig. 1 and a second working position shown in fig. 2, wherein the lever set in the closed state shown in fig. 1 is defined as the first working position, and the lever set in the open state shown in fig. 2 is defined as the second working position. It should be understood that the above definitions are merely used to distinctively describe the switching relationships of normally open and normally closed contacts, and do not constitute a substantial limitation on the auxiliary contacts claimed in this application.

The lever set 20 has a first activating portion 211 and a second activating portion 221 for controlling the terminal engaging states of the first set of wire holders a and the second set of wire holders B.

Specifically, each set of wire holders includes three wire terminals (a first wire terminal 31, a second wire terminal 32, and a third wire terminal 33) and one spring piece (3a, 3 b). Specifically, one end of each of the elastic pieces (3a, 3b) is electrically connected to the first connection terminal 31, and the other end of each of the elastic pieces can be electrically connected to either the second connection terminal 32 or the third connection terminal 33, that is, fig. 1 shows a closed state connected to the third connection terminal 33, and fig. 2 shows a closed state connected to the second connection terminal 32.

The first touching parts 211 are two arranged at intervals and are matched with the first elastic sheet 3a of the first group of wire holders a, and the body of the first elastic sheet 3a is positioned between the two first touching parts 211; similarly, the second touching portions 221 are two spaced apart from each other and are adapted to the second elastic sheet 3B of the second set of wire holders B, and the body of the second elastic sheet 3B is located between the two second touching portions 221.

Specifically, the two first touch portions 211 and the two second touch portions 221 are both in a shape of a boss protruding from the corresponding lever body; and the two first touch parts 211 and the two second touch parts 221 are located at the same side of the hinge position to fully utilize the space in the housing 10.

As shown in fig. 1, after the lever set 20 rotates clockwise (in a first direction) to switch to the first working position, based on the pressing action of the right-side first trigger 211 in the first direction, the first elastic sheet 3a of the first set of wire holders a deforms, and the other end of the first elastic sheet 3a is electrically connected to the set of third wire terminals 33; meanwhile, based on the pressing action of the right second touching portion 221 along the first direction, the second elastic sheet 3B of the second set of wire holder B deforms, and the other end of the second elastic sheet 3B is electrically connected to the set of third wire connecting terminals 33.

As shown in fig. 2, after the lever set 20 rotates in the counterclockwise direction (the second direction) to switch to the second working position, the first elastic sheet 3a of the first set of wire holders a deforms and is electrically connected to the set of second wire terminals 32 based on the pressing action of the left first touching portion 211 in the second direction; meanwhile, based on the pressing action of the left second touching portion 221 along the second direction, the second elastic sheet 3B of the second set of wire holder B deforms and is electrically connected to the set of second wire connecting terminals 32.

In this scheme, the two elastic pieces are electrically connected to the corresponding second connection terminal 32 or the corresponding third connection terminal 33, and are established after being pressed and deformed by the adaptive touch parts.

Of course, it is also possible to adopt a design in which the first elastic sheet 3a is electrically connected to at least one of the corresponding second connection terminal 32 or the third connection terminal 33, and is configured to: the first touching part 211 which follows up after the lever set 20 rotates to switch the working position is set after pressing and pressing the first elastic sheet 3a to deform; the second elastic piece 3b is electrically connected to at least one of the corresponding second connection terminal 32 or the corresponding third connection terminal 33, and is configured to: the second touching portion 221, which follows up after the lever set 20 rotates to switch the working position, presses against the second elastic sheet 3b to be deformed. That is, only one of the first activating portion 211 and the second activating portion 221 is set, and an electrical connection relationship is correspondingly established, so that when the lever set rotates reversely, the other electrical connection relationship is established based on the resilient sheet after the restoring state, that is, the resilient sheet can be electrically connected to one of the second connecting terminal 32 or the third connecting terminal 33 in a natural state (not shown in the figure).

In contrast, the elastic sheet in this embodiment is electrically connected to the second connection terminal 32 or the third connection terminal 33, and is established after the lever set rotates to switch the working positions and the two following touch portions respectively press the corresponding elastic sheet to deform. Therefore, the switching between the closed state and the open state has good operability, and the device has the characteristics of simple structure and reliable connection.

After the equipment is applied to the circuit breaker, based on the rotation switching of a lever group work position, can realize the switching operation of two sets of binding post joint state in step, can dispose the cost and effectively reduce, and on the basis of satisfying two way instruction functions of circuit breaker, can reduce the space and occupy.

In addition, the first elastic sheet 3a is electrically connected to the corresponding second connection terminal 32 and the corresponding third connection terminal 33, and the pressing direction of the corresponding first touching portion 211 can also be configured reversely. That is, the electrical connection between the first elastic piece 3a and the second connection terminal 32 is established by the first touching portion 211 pressing the first elastic piece 3a along the second direction to deform; the electrical connection between the first elastic piece 3a and the third connecting terminal 33 is established by the first touching portion 211 pressing the first elastic piece 3a along the first direction to deform (not shown in the figure).

Similarly, the pressing direction of the second touching portion 221 can be configured in the opposite direction for the electrical connection between the second elastic sheet 3b and the corresponding second connection terminal 32 and third connection terminal 33. That is, the electrical connection between the second elastic piece 3b and the second connecting terminal 32 is established by the second touching portion 221 pressing the second elastic piece 3b along the second direction to deform; the electrical connection between the second elastic piece 3b and the third connecting terminal 33 is established by the second touching portion 221 pressing the second elastic piece 3b along the first direction to deform (not shown in the figure).

In order to independently match the two sets of wire holder on-off controls, further, the lever set 20 may include a first lever 21 and a second lever 22, both of which are coaxially hinged with the housing 10 at the first hinge point i; two first touch portions 211 are provided on the first lever 21, and two second touch portions 221 are provided on the second lever 22. Except matching the on-off control of the two groups of wire holders, the wire holders can be selectively replaced according to actual conditions during maintenance, and the maintenance cost can be effectively controlled.

It should be noted that, in the first group of wire holders a and the second group of wire holders B in the present embodiment, as shown in fig. 3, the specific implementation of the structures such as the terminals and the fixing manner in the two groups of wire holders is not the core invention point of the present application, and those skilled in the art can implement the structures based on the prior art, so that the details are not described herein again.

Please refer to fig. 4 and fig. 5, wherein fig. 4 is a schematic structural diagram of the base according to the present embodiment, and fig. 5 is a schematic structural diagram of the cover according to the present embodiment. The housing 10 in this embodiment includes two parts, a base 11 and a cover 12, and forms a location and support for the assembly of the internal components.

In order to further improve the operability, elastic members may be respectively disposed between the two levers and the housing. As shown in fig. 1 and 2, a first elastic member 23 is provided between the first lever 21 and the housing 10, and a second elastic member 24 is provided between the second lever 22 and the housing 10, and configured such that: when the lever assembly 20 is switched to the first working position, the first elastic member 23 and the second elastic member 24 are deformed to provide a restoring force when the lever assembly 20 is switched to the second working position. Based on the design requirements of the particular different product, and vice versa.

Meanwhile, a circumferential limit pair is arranged between the first lever 21 and the second lever 22, the circumferential limit pair is composed of the side edge 212 of the first lever 21 and the interlocking convex part 222 on the second lever 22, and the circumferential limit pair is specifically configured as follows: when the lever set 20 is switched to the first working position by rotation, the second lever 22 can drive the first lever 21 to rotate by the circumferential limiting pair; when the lever set 20 is switched to the second working position, the first lever 21 can drive the second lever 22 to rotate through the circumferential limiting pair.

It is understood that the first elastic member 23 and the second elastic member 24 may take different structural forms, such as, but not limited to, a tension spring, a torsion spring, a compression spring, and the like.

Meanwhile, in a specific application, in consideration of effective utilization of the internal space, as an option, the first elastic element 23 in the present embodiment is a tension spring, one end of which is hooked on the hooking protrusion 213 on the first lever 21, and the other end of which is hooked on the pin 13 on the base 11, please refer to fig. 1, fig. 2 and fig. 6 together, where fig. 6 is a schematic structural diagram of the first lever in the present embodiment.

In this embodiment, the second elastic element 24 may be a torsion spring, the body of the torsion spring 4 may be sleeved on the hinge shaft at the first hinge point i, one working end presses against the socket 223 of the second lever 22, and the other working end presses against the fixing portion 14 on the base 11, please refer to fig. 1, fig. 2 and fig. 7 together, where fig. 7 is a schematic structural diagram of the second lever in this embodiment. Here, the torsion spring is not completely shown in the drawings for clearly showing the assembling relationship of other related components.

In addition, the auxiliary contact provided by the embodiment can also be provided with a test function. Referring to fig. 1, 2, 8 and 9, fig. 8 is a schematic view showing a use state of the handle, the link, the jumper and the locking member, and fig. 9 is a schematic view showing a fitting relationship of the jumper and the locking member.

In the present embodiment, the handle 40 provides a driving force for rotating the lever set 20 to switch the working positions. As shown in fig. 8, the handle 40 is hinged to the housing 10, i.e. the second hinge point ii, and is in transmission connection with the jump buckle 60 through the connecting rod 50, so as to drive the lever set 20 to rotate through the jump buckle 60.

Here, the driving connection relationship between the handle 40 and the jumper 60 may be realized by using different structures, not limited to the link 50 shown in the drawing. The link 50 is bent and formed, and both ends thereof are bent toward the handle 40 and the jump button 60, respectively, and inserted into the mounting holes of the handle 40 and the jump button 60.

The jump buckle piece 60 is hinged to a first position of the second lever 22, namely a third hinge point iii, and the jump buckle 60 is provided with a stop limiting part 61; the latch member 70 is hinged to the second position of the second lever 22, i.e., the fourth hinge point iv, and the latch member 70 has a locking end 71 extending from the body.

As shown in fig. 8 and 9, the locking end 71 of the locking element 70 can abut against the stop limiting portion 61 of the trip element 60 to limit the rotation of the trip element 60 and the locking element 70 relative to the second lever 22; at this time, the working position switching function of the lever set 20 is integrally satisfied.

Of course, in order to further improve the operability, elastic members may be provided for the locking member 70 and the handle 40, respectively. Specifically, a third elastic member 72 is provided between the locking member 70 and the second lever 22 to provide a return force when the locking end 71 and the stopper 61 explain locking; a fourth elastic member 41 is provided between the handle 40 and the housing 10 to provide a restoring force when the force applied to the handle 40 side is released.

Specifically, the locking member 70 is forced to rotate in the first direction (clockwise) relative to the second lever 22 so that the locking end 71 is disengaged from the stopper limiting portion 61, and the third resilient member 72 is deformable to provide a force for rotationally resetting the locking member 70 in the second direction (counterclockwise).

Meanwhile, the first lever 21 has a test toggle portion 25 extending from the housing 10. Thus, based on the switching of the working positions, after the transmission connection relation of the handle 40 on the transmission path is released, the test toggle part 25 is manually operated to test the connection and disconnection of the contact.

In addition, the third elastic member 72 and the fourth elastic member 41 may also adopt different structural forms, such as, but not limited to, a tension spring, a torsion spring, a compression spring, and the like. In this embodiment, the third elastic element 72 and the fourth elastic element 41 may be both torsion springs, and the spring bodies are respectively sleeved on the hinge pins of the locking element 70 and the handle 40 and are correspondingly fixed to the working ends.

In addition to the aforementioned auxiliary contacts, the present embodiment also provides a circuit breaker, which employs the aforementioned auxiliary contacts. It should be understood that other functions of the circuit breaker are not the core invention of the present application, and those skilled in the art can implement the circuit breaker based on the prior art, so that the detailed description is omitted here.

The ordinal numbers "first" and "second" used herein are used only to describe a structure or acts of like function in the claims. It is to be understood that the use of the ordinal numbers "first" and "second" does not constitute an understandable limitation on the claimed technical solution.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims (10)

1. An auxiliary contact includes a housing; it is characterized in that the device also comprises a casing body, wherein:

the lever group is hinged on the shell and can be rotationally switched between a first working position and a second working position, and the lever group is provided with a first touch part and a second touch part;

two groups of wire holders are respectively arranged on two sides of the lever group;

each group of the wire holders comprises three wiring terminals and an elastic sheet, one end of the elastic sheet is electrically connected with the first wiring terminal, and the other end of the elastic sheet can be selected to be electrically connected with the second wiring terminal or the third wiring terminal;

the first touch part and the second touch part are respectively matched with a first elastic sheet of the first group of wire holders and a second elastic sheet of the second group of wire holders, and when the first elastic sheet is electrically connected with the corresponding second wire terminals, the first elastic sheet and the second elastic sheet are configured as follows: the first touch part which is driven by the lever set after the lever set rotates to switch the working position presses and presses the first elastic sheet to deform; when the second elastic sheet is electrically connected with the corresponding second wiring terminal, the configuration is as follows: the second touch part which is driven by the lever set after the lever set rotates to switch the working position presses and presses the second elastic sheet to deform and then is established.

2. The auxiliary contact according to claim 1, wherein the first touching portions are two touching portions that are spaced apart from each other, the body of the first resilient piece is located between the two first touching portions, and the electrical connection between the first resilient piece and the corresponding second connection terminal or third connection terminal is configured to: after the lever set rotates to switch the working positions, the two first touch parts which follow up press the first elastic sheet to deform respectively and then are established; the second touches the portion for two that the interval set up, the body of second shell fragment is located two between the second touches the portion, the second shell fragment and corresponding second binding post or third binding post's electric connection, dispose to: after the lever set rotates to switch the working positions, the two follow-up second touch parts respectively press and abut against the second elastic sheet to be deformed and then are established.

3. The auxiliary contact according to claim 2, wherein the electrical connection of the first spring plate to the corresponding second terminal is configured to: after the lever set is rotationally switched to the first working position, one of the two first follow-up touch parts presses the first elastic sheet along a first direction to deform, and then the first elastic sheet is established; the first elastic sheet is electrically connected with the corresponding third connecting terminal and is configured as follows: after the lever set is rotationally switched to the second working position, the lever set is established by pressing the other one of the two follow-up first touch parts against the first elastic sheet along a second direction to deform;

the second elastic sheet is electrically connected with the corresponding second connecting terminal and is configured as follows: after the lever set is rotationally switched to the first working position, one of the two follow-up second touch parts presses the second elastic sheet along a first direction to deform and then is established; the second elastic sheet is electrically connected with the corresponding third connecting terminal and is configured as follows: after the lever set rotates and is switched to the second working position, the lever set is established by pressing and abutting the second elastic sheet to deform along a second direction through the other one of the two follow-up second touch parts.

4. The auxiliary contact as claimed in claim 3, characterized in that the set of levers comprises a first lever and a second lever, both of which are hinged coaxially to the housing; the two first touch parts are arranged on the first lever, and the two second touch parts are arranged on the second lever.

5. The auxiliary contact of claim 4, further comprising:

the first elastic piece is arranged between the first lever and the shell;

the second elastic piece is arranged between the second lever and the shell;

when the lever assembly is switched to the first working position in a rotating mode, the first elastic piece and the second elastic piece deform to provide a reset acting force when the lever assembly is switched to the second working position in a rotating mode;

and a circumferential limiting pair is arranged between the first lever and the second lever, and is configured as follows: when the lever set is switched to the first working position in a rotating mode, the second lever can drive the first lever to rotate through the circumferential limiting pair; when the lever set rotates and is switched to the second working position, the first lever can drive the second lever to rotate through the circumferential limiting pair.

6. The auxiliary contact of claim 5, further comprising:

the jump buckle is hinged to the first position of the second lever and is provided with a stop limiting part;

the locking piece is hinged to the second position of the second lever and provided with a locking end which extends from the body and forms a locking end, and the locking end can be abutted against the stop limiting part of the jump buckle piece so as to limit the jump buckle piece and the locking piece to rotate relative to the second lever;

the handle is hinged to the shell and is in transmission connection with the jump buckle piece so as to provide driving force for the lever set to rotate to switch the working position.

7. The auxiliary contact of claim 6, further comprising:

the third elastic piece is arranged between the locking piece and the second lever;

a fourth elastic member disposed between the handle and the housing;

the locking piece can rotate along a first direction relative to the second lever so that the locking end is separated from the stopping limiting part, and the third elastic piece can deform to provide acting force for the locking piece to rotate and reset along a second direction; the first lever is provided with a test toggle part which can extend out of the shell;

the handle is in transmission connection with the jump buckle piece through the connecting rod, and when the locking end is separated from the locking limiting part, the fourth elastic piece can provide reset acting force of the handle.

8. The auxiliary contact as claimed in claim 7, wherein the first elastic member is a tension spring, and the second elastic member, the third elastic member and the fourth elastic member are torsion springs.

9. The auxiliary contact as claimed in any one of claims 4 to 8, wherein both of the first actuating portions and both of the second actuating portions are in the form of bosses protruding from the respective lever bodies; and the two first touch parts and the two second touch parts are positioned at the same side of the hinge joint position.

10. A circuit breaker comprising an auxiliary contact, characterized in that the auxiliary contact is an auxiliary contact according to any of claims 1 to 9.

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