Operating mechanism, circuit breaker and backup protector

Abstract

The invention provides an operating mechanism which comprises a shell and a movement assembly, and the movement assembly comprises a manual operation piece, a center plate, a transmission assembly, a moving contact support and a first torsion spring. The two ends of the first torsion spring are connected to the moving contact support and the center plate respectively. The pivoting of the central plate can drive the moving contact support to pivot, and the pivoting of the moving contact support can drive the pivoting of the central plate. Through the transmission assembly and the center plate, when the manual operation piece moves to the opening position, the moving contact support moves to the opening position, when the manual operation piece moves to the closing position, the moving contact support moves to the closing position, and the moving contact support further comprises a first cut-off face, a cut-off arc-shaped protruding part and a base part. The moving contact support is installed on the shell through a moving contact support pivotal shaft, and the extreme point of the stress of the moving contact support pivotal shaft on the moving contact support is opposite to the first cut surface relative to the moving contact support pivotal shaft.

Description

Technical Field

[0001] The present disclosure relates to the electrical field, and in particular to an operating mechanism, a circuit breaker including the operating mechanism, and a backup protector. Background Art

[0002] In order to increase the safety of electricity use, SSD (backup protector) and SPD (surge protector) are often added to some circuits. The two are connected in series in the electrical circuit. SPD can resist lightning strikes, and SSD provides short-circuit protection and follow-up protection for SPD.

[0003] In addition, the integration and miniaturization of low-voltage electrical products in today's society is a development trend, which requires the size of SSD products and SPD products to be reduced, which requires the size of each component inside the product to be smaller and smaller, and it is necessary to design a small-sized part structure that meets the requirements of short circuit and freewheeling, while withstanding the high-intensity performance of lightning current.

[0004] It is difficult to realize the relative arrangement of parts inside small-sized mechanism components, and it is even more difficult to design parts with strength that meets the requirements of small-sized components. The present invention aims to provide an ultra-thin operating mechanism design scheme to solve the problems of relative arrangement of parts, part strength and movement of small-sized SSD products, so as to ensure that small-sized SSD products can achieve reliable mechanism movement under the required functions. Summary of the invention

[0005] The purpose of the present disclosure is to at least solve the shortcomings existing in the prior art. The present disclosure proposes an operating mechanism, which includes a shell and a moving assembly, and the moving assembly includes: a hand operating piece, which can be pivotally mounted to the shell and can pivot between an open position and a closed position; a center plate, which can be pivotally mounted to the shell; a transmission assembly, through which the hand operating piece and the center plate are connected; a moving contact bracket, which can be pivotally mounted to the shell, and the moving contact bracket abuts against a first surface of the center plate, and the pivot axis of the moving contact bracket coincides with the pivot axis of the center plate; a first torsion spring, which is mounted on a side of the moving contact bracket opposite to the center plate, and the two ends of the first torsion spring are respectively connected to the moving contact bracket and the center plate, so that the pivoting of the center plate can drive the moving contact bracket to pivot and the pivoting of the moving contact bracket can drive the center plate to pivot.

[0006] Wherein, through the transmission assembly and the center plate, when the manual operating member moves to the open position, the moving contact bracket moves to the opening position, and when the manual operating member moves to the closed position, the moving contact bracket moves to the closing position. The pivot axes of the manual operating member, the center plate and the moving contact bracket are all parallel to the first direction. The moving contact bracket and the center plate pass through multiple planes perpendicular to the first direction.

[0007] The moving contact support includes a torsion spring accommodating groove, which includes a base and an arc-shaped protrusion surrounding the pivot axis of the moving contact support, the base has a second surface and a third surface relative to each other, the second surface abuts against the first surface, the arc-shaped protrusion extends from the third surface in a first direction, and the first torsion spring is installed in the torsion spring accommodating groove around the arc-shaped protrusion.

[0008] The movable contact bracket further comprises a first cut surface, which cuts off the arc-shaped protrusion and the base, so that the arc-shaped protrusion forms an incomplete circular ring structure. The movable contact bracket is mounted to the housing through a movable contact bracket pivot shaft, and the force acting position of the movable contact bracket pivot shaft on the movable contact bracket is opposite to the first cut surface relative to the movable contact bracket pivot shaft.

[0009] According to some embodiments of the present disclosure, the total thickness of the moving component in the first direction is less than or equal to 7.5 mm.

[0010] According to some embodiments of the present disclosure, the total thickness of the moving component in the first direction is less than or equal to 7.3 mm.

[0011] According to some embodiments of the present disclosure, the center plate further includes a boss section protruding from the first surface, the boss section including a second cut surface, the second cut surface conforming in shape to and relatively adjacent to the first cut surface.

[0012] According to some embodiments of the present disclosure, in a cross section perpendicular to the first direction, the first cut surface is a secant line of the incomplete circular ring structure of the arc-shaped protrusion.

[0013] According to some embodiments of the present disclosure, the transmission assembly includes a lock, which can be pivotally mounted to a side of the center plate opposite to the moving contact bracket and has a first mating portion; a connecting rod, both ends of which are pivotally connected to the hand-operated piece and the lock, respectively; and a jump catch, which can be pivotally mounted to a side of the center plate opposite to the moving contact bracket, and has a second mating portion that cooperates with the first mating portion.

[0014] Wherein, the pivot axes of the hand-operated member, the center plate, the lock buckle, the jump buckle and the moving contact bracket are parallel to the first direction,

[0015] The operating mechanism is configured to enable the lock buckle and the jump buckle to be stationary relative to the center plate through the cooperation of the first cooperation portion and the second cooperation portion.

[0016] According to some embodiments of the present disclosure, the jumper is further connected to the center plate via a second torsion spring, and the second torsion spring biases the jumper relative to the center plate so that the first mating portion and the second mating portion are in abutment and mating.

[0017] According to some embodiments of the present disclosure, when the first mating portion and the second mating portion are mated, the relatively static assembly formed by the center plate, the lock catch and the jump catch, the hand operating piece, the connecting rod and the center plate and the relatively static assembly can constitute a four-bar mechanism, so that when the hand operating piece moves to the open position, the moving contact bracket moves to the opening position, and when the hand operating piece moves to the closed position, the moving contact bracket moves to the closing position.

[0018] According to some embodiments of the present disclosure, when the moving contact support moves from the opening position to the closing position, the four-bar linkage formed by the hand-operated member, the connecting rod and the relatively stationary component passes through a dead point position.

[0019] According to some embodiments of the present disclosure, the connecting rod has two sections that are angled with each other.

[0020] According to some embodiments of the present disclosure, the jumper is further provided with an extended end adjacent to the moving contact bracket, and a gap is provided between the extended end and the moving contact bracket in a plane perpendicular to the first direction.

[0021] According to some embodiments of the present disclosure, when the extension end is actuated, the jump catch pivots relative to the center plate, so that the first mating portion and the second mating portion are disengaged, the hand-operated piece, the connecting rod, the lock catch and the center plate can form a five-bar mechanism, and the extension end can hit the moving contact bracket, so that the moving contact bracket moves toward the opening position.

[0022] According to some embodiments of the present disclosure, the operating mechanism further includes a trip spring, two ends of which are respectively connected to the center plate and the housing, and when the hand-operated piece is in a closed position, the trip spring is compressed.

[0023] According to some embodiments of the present disclosure, the jump buckle and the lock buckle respectively abut against the fourth surface and the fifth surface of the center plate, and there is a distance between the planes where the fourth surface and the fifth surface are respectively located and are both perpendicular to the first direction.

[0024] According to some embodiments of the present disclosure, the fourth surface is further away from the first surface than the fifth surface.

[0025] The present disclosure also provides a circuit breaker, which includes the operating mechanism described in any one of the above embodiments.

[0026] According to some embodiments of the present disclosure, the maximum thickness of the circuit breaker in the first direction is between 8.8 mm and 9.2 mm.

[0027] The present disclosure also proposes a backup protector, which includes the operating mechanism described in any of the above embodiments.

[0028] According to some embodiments of the present disclosure, the maximum thickness of the backup protector in the first direction is between 8.8 mm and 9.2 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic plan view of the operating mechanism according to the present disclosure is shown, wherein the moving contact support is in the open position;

[0030] Figure 2 A schematic plan view of the operating mechanism according to the present disclosure is shown, wherein the moving contact support is in a closing position;

[0031] Figure 3a and Figure 3b A schematic diagram showing the assembly of some components of the operating mechanism according to the present disclosure from two viewing angles;

[0032] Figure 4a along Figure 4b The cross-sectional view taken along the line NN in the figure, Figure 4b Show Figure 3a and Figure 3b A schematic diagram of the structure in FIG. Figure 4c yes Figure 4a An enlarged schematic diagram of the structure in the circle frame, Figure 4d yes Figure 4b An enlarged schematic diagram of the structure within the box in FIG.

[0033] Figure 5 A three-dimensional schematic diagram of a moving contact bracket according to the present disclosure is shown;

[0034] Figure 6a and Figure 6b A perspective schematic diagram showing a center plate according to the present disclosure from two viewing angles;

[0035] Figure 7a-7c A plan view of a center panel according to the present disclosure is shown, wherein: Figure 7a is a plan view of the first side of the center plate, Figure 7b is along Figure 7c The cross-sectional view taken along the section line MM in FIG. Figure 7c is a plan view of the second side of the center panel.

[0036] Reference numerals

[0037] 1 shell, 11 first rib, 12 second rib

[0038] 2 hand operation parts, 21 operation handles

[0039] 3 center plate, 31 boss section, 32 arc section, 33 first stop portion, 34 second stop portion, 4 moving contact bracket, 41 torsion spring receiving groove, 411 base, 412 arc protrusion, 42 moving contact bracket pivot shaft, 43 moving contact

[0040] 51 lock buckle, 511 first matching part, 52 jump buckle, 521 second matching part, 522 extension end, 53 connecting rod,

[0041] 61 stationary contact, 62 actuator

[0042] 71 first torsion spring, 72 second torsion spring, 73 brake spring

[0043] 81 first surface, 82 second surface, 83 third surface, 84 fourth surface, 85 fifth surface, 86 first cut surface, 87 second cut surface DETAILED DESCRIPTION

[0044] In order to make the purpose, scheme and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present disclosure. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0045] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0046] For the convenience of description, the direction in which the pivot axis of the hand operating member 2 is located is designated as the first direction.

[0047] According to the operating mechanism of the present disclosure, Figure 1 and Figure 2As shown, it includes a housing 1 and a moving assembly. The moving assembly includes a hand operating piece 2, a center plate 3, a moving contact bracket 4 and a transmission assembly. The hand operating piece 2 and the center plate 3 are both pivotally mounted to the housing 1, and the pivot axes of the hand operating piece 2 and the center plate 3 are parallel to each other, that is, parallel to the first direction. The hand operating piece 2 also includes an operating handle 21 protruding from the housing, so that the hand operating piece 2 can be pivoted around its pivot axis by swinging the operating handle 21. In addition, the housing 1 is also configured to limit the swing range of the operating handle 21, so that the hand operating piece 2 can only move between an open position and a closed position, wherein, Figure 1 The hand control element 2 is shown in the open position. Figure 2 The hand control element 2 is shown in the closed position.

[0048] The movable contact bracket 4 is also pivotally mounted to the housing 1 and pivots around the same axis as the center plate 3. The movable contact bracket 4 is mounted against one side of the center plate 3, and a first torsion spring 71 (such as Figure 3b The movable contact bracket 4 is connected to the movable contact bracket 4 by the pivoting of the center plate 3. The movable contact 43 is installed at the end of the movable contact bracket 4. Figure 3b As shown, the contact and separation between the moving contact 43 and the stationary contact 61 realize the on-off of the circuit.

[0049] The transmission assembly includes a lock buckle 51, a jump buckle 52 and a connecting rod 53, which are used to transmit and connect the hand-operated piece 2 with the center plate 3, that is, the movement of the hand-operated piece 2 can be transmitted to the center plate 3 through the transmission assembly, and vice versa, the movement of the center plate 3 can be transmitted to the hand-operated piece 2 through the transmission assembly, which will be described in detail later.

[0050] Thus, through the center plate 3 and the transmission assembly, the pivoting of the hand operating member 2 can drive the pivoting of the moving contact bracket 4, and the pivoting of the moving contact bracket 4 can also drive the pivoting of the hand operating member 2. Figure 1 As shown, when the hand-operated member 2 moves to the open position, the moving contact bracket 4 moves to the open position. In the open position, the moving contact bracket 4 drives the moving contact 43 to separate from the static contact 61. Figure 2 As shown, when the hand operating member 2 moves to the closed position, the moving contact bracket 4 moves to the closing position, and in the closing position, the moving contact 43 keeps in contact with the static contact 61. Thus, the on-off operation of the moving contact 43 and the static contact 61 can be controlled by the operating handle 2.

[0051] Next, the structures of the center plate 3, the moving contact bracket 4 and the transmission assembly are described in detail.

[0052] Figure 3a and Figure 3bThe schematic diagram of assembling some components of the operating mechanism according to the present disclosure is shown from two perspectives, specifically, Figure 3a As shown, the lock buckle 51 is pivotally mounted to the side of the center plate 3 opposite to the moving contact bracket 4, and has a first matching portion 511. The jump buckle 52 is pivotally mounted to the side of the center plate opposite to the moving contact bracket 4, and the jump buckle 52 has a second matching portion 521 that matches the first matching portion 511. The first matching portion 511 and the second matching portion 521 can match each other so that the lock buckle 51 and the jump buckle 52 can be relatively stationary relative to the center plate 3. The pivot axis directions of the lock buckle 51 and the jump buckle 52 are also parallel to the first direction. For example, Figure 3a As shown, the first mating portion 511 and the second mating portion 521 may have complementary hook structures. In addition, the first mating portion 511 and the second mating portion 521 may also have clamping structures, overlapping structures, keyway structures, and other mating structures that can be thought of by those skilled in the art.

[0053] In addition, the jumper 52 is connected to the center plate 3 through a second torsion spring 72 to bias the jumper 52 to a position that cooperates with the lock buckle 51. This further ensures that the jumper 52 cooperates with the lock buckle through the first matching portion 511 and the second matching portion 521, and is also conducive to the jumper 52 returning to its original position after the cooperation between the jumper 52 and the lock buckle 51 is released, so as to maintain smooth closing.

[0054] The transmission assembly also includes a connecting rod 53, such as Figure 1 and Figure 2 As shown, the two ends of the connecting rod 53 are respectively pivotally connected to the hand operating member 2 and the lock buckle 51. The connecting rod 53 may have two sections that are angled with each other to avoid other mechanisms in the housing, thereby preventing interference and further improving space compactness.

[0055] When the hand-operated member 2 drives the center plate 3 to pivot through the transmission assembly, the jumper 52 and the lock buckle 51 always keep in cooperation, that is, the jumper 52 and the lock buckle 51 always keep stationary relative to the center plate 3, so the distance between the connection point between the connecting rod 53 and the lock buckle 51 and the pivot axis of the center plate 3 is constant. Therefore, the center plate 3, the lock buckle 51 and the jumper 52 form a relatively static assembly, so that the hand-operated member 2, the connecting rod 53 and the relatively static assembly formed by the center plate 3, the lock buckle 51 and the jumper 52 form a four-bar linkage, that is, the hand-operated member 2 and the center plate 3 are both pivotally fixed, and the two ends of the connecting rod 53 are pivot connection points, and the hand-operated member 2 drives the center plate 3 to pivot through the four-bar linkage.

[0056] In order to ensure the closing safety of the mechanism, that is, to ensure that the moving contact 43 and the stationary contact 61 are kept in contact, in the process of the moving contact bracket 4 moving from the opening position to the closing position, the above-mentioned four-bar linkage is arranged to pass through the dead point position, specifically, in a plane perpendicular to the first direction, for example Figure 1and Figure 2 In the plane, the connection point of the manual operating member 2 and the connecting rod 53, the connection point of the manual operating member 2 and the lock buckle 51, and the pivot center point of the manual operating member 2 are in a straight line. Therefore, due to the setting of the dead point position, the moving contact bracket 4 cannot easily move from the closing position to the opening position, ensuring the long-term contact between the moving contact 43 and the static contact 61.

[0057] In order to separate the moving contact 43 from the stationary contact 61, an actuator 62 is required, which may be, for example, an electromagnetic coil, a pneumatic cylinder, a hydraulic cylinder, etc., and has an execution end that moves in a direction perpendicular to the first direction. The execution end can give the moving contact bracket 4 kinetic energy to achieve the opening movement, but if the existence of the above-mentioned dead point makes it difficult for the moving contact bracket 4 to move to the opening position, it is necessary to disengage the first matching portion 511 from the second matching portion 521, so that the above-mentioned four-bar linkage mechanism becomes a five-bar linkage mechanism.

[0058] Specifically, Figure 3a and Figure 3b As shown, the jumper 52 is also provided with an extended end 522, which can be arranged between the free end of the 62 and the moving contact bracket 4, and the free end can hit the extended end 522, so that the jumper 52 can pivot around its pivot axis in a direction away from the lock buckle 51, for example, the first matching portion 511 and the second matching portion 521 are unmatched, and then the lock buckle 51 can pivot relative to the center plate 3. In this state, the hand operating member 2, the connecting rod 53, the lock buckle 51, and the center plate 3 form a five-link mechanism, and by adding a degree of freedom, it is possible to cross the above-mentioned dead point and realize the opening movement of the moving contact bracket 4.

[0059] According to the housing 1 of the present disclosure, its maximum thickness in the first direction is between 8.8-9.2 mm, and the maximum thickness of the housing refers to the maximum value of the distance between any two points on the housing in the first direction measured from the outside of the housing. This thickness greatly reduces the volume of the product according to the present disclosure, making it easier to install the product in a narrow installation space.

[0060] The total thickness of the moving component (i.e., the hand-operated part 2, the center plate 3, the jump buckle 52, the lock buckle 51, the moving contact bracket 4, the first torsion spring 71 and the connecting rod 53) in the first direction may be less than or equal to 7.6 mm, or less than or equal to 7.5 mm, or less than or equal to 7.4 mm, or less than or equal to 7.3 mm, or less than or equal to 7.2 mm, or less than or equal to 7.1 mm, or less than or equal to 7.0 mm. The total thickness of the above-mentioned moving component in the first direction refers to the total thickness of the moving component in the assembled state, that is, the maximum value of the distance between any two points in the moving component in the first direction. By setting the thickness of the moving component in the first direction to the above-mentioned range, it is ensured that the moving component according to the present disclosure can be installed in the above-mentioned housing 1, and the installation error and safety spacing distance are reserved.

[0061] Figure 4a Shown along Figure 4b The cross-sectional view taken along the line NN in the figure, Figure 4b Show Figure 3a and Figure 3b A schematic diagram of the structure in FIG. Figure 4c yes Figure 4a An enlarged schematic diagram of the structure in the circle frame, Figure 4d yes Figure 4b An enlarged schematic diagram of the structure in the box. Figure 4a and Figure 4c As shown, the moving contact bracket 4, the center plate 3, the lock buckle 51, and the jump buckle 52 jointly pass through multiple planes perpendicular to the first direction, that is, the extension intervals of these components in the first direction have an intersection, thereby making full use of the space and reducing the thickness of the moving component in the first direction, so as to facilitate the realization of the above-mentioned total thickness range of the moving component.

[0062] A gap is provided between the extending end 522 and the moving contact support 4 in a plane perpendicular to the first direction. Figure 4b After the free end of the stopper 62 hits the extension end 522, the extension end 522 hits the moving contact bracket 4 at a certain speed, which is beneficial for faster acceleration of the moving contact bracket 4, and is beneficial for reducing the time of opening the switch, and further improving the safety performance.

[0063] In addition, back to Figure 1 and Figure 2 According to the operating mechanism disclosed in the present invention, the opening spring 73 may further include two ends of the opening spring connected to the center plate 3 and the housing 1 respectively. When the hand operating member 2 is in the closed position, that is, the moving contact bracket is in the closing position, the opening spring 73 is compressed. When the moving contact bracket 4 moves from the closing position to the opening position, the opening spring 73 releases elastic potential energy to further accelerate the movement of the opening spring 73, which is beneficial to further reduce the opening time and further improve the safety performance.

[0064] like Figure 1 and Figure 2 As shown, the housing further includes a first rib 11 and a second rib 12. Since the motion mechanism may need to withstand the airflow impact of short circuit and lightning strike, a first rib is provided between the hand-operated part 2 and the center plate 3 and the moving contact bracket 4 to block the airflow. The second rib 12 is provided adjacent to the moving contact bracket 4, as shown in FIG. Figure 2 As shown, it is used to limit the moving contact bracket 4, absorb the opening energy of the operating mechanism, and prevent the moving contact bracket from rebounding too much and breaking the contact.

[0065] Figure 5 The movable contact bracket 4 according to an embodiment of the present disclosure is shown. The movable contact bracket 4 is pivoted by the movable contact bracket pivot shaft 42 ( Figure 3b As shown in FIG. 1 , the movable contact support 4 further comprises a torsion spring receiving groove 41, and the torsion spring receiving groove 41 comprises a base 411 and an arc-shaped protrusion 412 surrounding the movable contact support pivot shaft 42. The base has a second surface 82 and a third surface 83 opposite to each other, and the second surface 82 is used to abut against the first surface 81 of the center plate 3, as shown in FIG. Figure 4c As shown. Figure 5 As shown, the arc-shaped protrusion 412 extends in the first direction from the third surface 83. The first torsion spring 71 is installed in the torsion spring receiving groove 41 around the arc-shaped protrusion 412 to prevent the first torsion spring 71 from being separated from the operating mechanism, and the arc-shaped protrusion 412 can apply abutting force to the first torsion spring 71, so that the first torsion spring 71 can be balanced in force.

[0066] The movable contact support 4 further includes a first cut surface 86, which cuts off the arc-shaped protrusion 412 and the base 411, so that the arc-shaped protrusion 412 forms an incomplete circular ring structure. The setting position of the first cut surface 86 needs to be accurately designed. Specifically, the stress extreme point ( Figure 4b The black dot in FIG. 8 is opposite to the first cut surface 86 relative to the pivot axis 42 of the movable contact support. Figure 4bAs shown, the force of the moving contact support 4 is analyzed. It is subjected to the force F1 of the first torsion spring and the force F2 of the static contact 61 (not shown) when closed. In order to balance the two forces, the moving contact support 4 is also subjected to the stress of the automatic contact support pivot shaft 42. Therefore, the force position of the moving contact support pivot shaft 42 on the moving contact support 4 can be set. Specifically, by adjusting the structure of the first torsion spring 71, the angle position of the first torsion spring 71 relative to the moving contact support 4, the contact position of the moving contact 43 and the static contact 61, etc., the force position can be set to avoid the first cut surface 86 (weak strength point), that is, the first cut surface 86 is located on both sides of the moving contact support pivot shaft 42. Therefore, even if there is a cut surface, it will not affect the strength of the moving contact support 4. At the same time, under the premise that the thickness of the above-mentioned moving assembly in the first direction is greatly reduced, the cut surface is set to reserve more space for the center plate 3, so that the center plate 3 can be set thicker in the reserved space to ensure the strength and processability of the center plate.

[0067] Next, we will introduce the center plate 3 in detail. Figure 6a and Figure 6b A perspective schematic diagram of a center plate 3 according to the present disclosure is shown from two viewing angles respectively; Figure 7a-7c A plan view of a center panel according to the present disclosure is shown, wherein: Figure 7a is a plan view of the first side of the center plate, Figure 7b is along Figure 7c The cross-sectional view taken along the section line MM in FIG. Figure 7c is a plan view of the second side of the center plate. Figure 6a The first side of the center plate 3 is shown, and a first surface 81 is provided on the side, and the moving contact support 4 is installed against the first surface 81. The center plate 3 also includes a boss section 31 protruding from the first surface 81, and the boss section 31 includes a second cut surface 87, and the second cut surface 87 is consistent with the first cut surface 86 in shape, and the two can be arranged relatively adjacent, that is, the boss section 31 and the arc-shaped protrusion 412 are arranged relatively adjacent, as shown in FIG. Figure 4b and Figure 4d shown.

[0068] Combination Figure 4c and Figure 7b As shown in the cross-sectional view, the arrangement of the boss section 31 increases the thickness of the center plate 3 at that location. If the boss section 31 having the second cross-sectional surface 87 does not exist, the first surface 81 may be almost in the same plane as the fourth surface 84 (described later), making the center plate 3 unmanufacturable. Even if it is manufactured, it will be unusable due to its extremely low strength.

[0069] like Figure 6a and Figure 7aAs shown, the first side of the center plate 3 may also be provided with an arc segment 32, which together with the moving contact support 4 forms a complete circular periphery. Figure 4b As shown, the first torsion spring is enclosed therein, further ensuring the secure installation of the first opening spring 71 to prevent accidental detachment.

[0070] In particular, if Figure 4d As shown, in the cross section perpendicular to the first direction, the first cut surface 86 is the secant of the incomplete circular ring structure of the arc-shaped protrusion 412, that is, the first cut surface 86 is a plane, so the second cut surface 87 is also a plane, which is convenient for manufacturing and assembly.

[0071] In addition, if Figure 6b As shown, according to the present disclosure, the center plate 3 also includes a first stop portion 33 and a second stop portion 34, which are respectively used to limit the movement range of the lock buckle 51 and the jump buckle 52. Arranging the two stop portions on the center plate further fully utilizes the space, making the structure more compact, which is beneficial to further reduce the total thickness of the moving component in the first direction.

[0072] like Figure 6b and Figure 7c As shown, the second side of the center plate 3 according to the present disclosure may be provided with a fourth surface 84 and a fifth surface 85, the jump buckle 52 is mounted against the fourth surface 84 of the center plate 3, the lock buckle 51 is mounted against the fifth surface 85 of the center plate 3, and the planes where the fourth surface 84 and the fifth surface 85 are located are spaced apart and are perpendicular to the first direction. In particular, the fourth surface 84 is further away from the first surface 81 than the fifth surface 85, as shown in FIG. Figure 4c and Figure 7b As shown in the cross-sectional view. Since both ends of the lock buckle 51 are pivotally connected to the connecting rod 53 and the center plate 3, the strength of the lock buckle 51 needs to be greater than that of the jump buckle 52, so the fifth surface 85 is closer to the first surface 81 than the fourth surface 84, which reserves more space for the lock buckle 51, so that the lock buckle 51 can be set thicker to ensure strength.

[0073] The product including the above operating mechanism according to the present disclosure may be a circuit breaker, in particular a miniature circuit breaker (MCB), or a backup protector (SSD). The product according to the present disclosure has a small-sized component structure that meets the requirements of short circuit and freewheeling and has high strength performance of withstanding lightning current.

[0074] It should be understood that the above description is intended to illustrate rather than limit. For example, the above embodiments (and / or aspects thereof) can be used in combination with each other. In addition, without departing from the scope of the present disclosure, many modifications can be made to adapt specific situations or materials to the teachings of the present disclosure. The functions or performances of the various elements or modules described herein are only for illustration and are by no means restrictive, but are merely exemplary embodiments. After reading the above description, many other embodiments and modifications within the spirit and scope of the claims will be apparent to those skilled in the art. Therefore, the scope of the present disclosure should be determined with reference to the full scope of the equivalents given by the attached claims and these claims.

[0075] In the following claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

Claims

1. An operating mechanism, wherein: The invention comprises a housing and a moving assembly, wherein the moving assembly comprises: A hand operating member is pivotally mounted to the housing and is pivotable between an open position and a closed position. a center plate pivotably mounted to the housing, The transmission assembly is connected to the hand-operated part and the center plate through the transmission assembly. The movable contact bracket can be pivotally mounted to the housing, and the movable contact bracket abuts against the first surface of the center plate, the pivot axis of the movable contact bracket coincides with the pivot axis of the center plate, and the pivot axes of the hand operating member and the movable contact bracket are parallel to the first direction, A first torsion spring is installed on a side of the moving contact bracket opposite to the center plate, and two ends of the first torsion spring are respectively connected to the moving contact bracket and the center plate, so that the pivoting of the center plate can drive the moving contact bracket to pivot and the pivoting of the moving contact bracket can drive the center plate to pivot, Wherein, through the transmission assembly and the center plate, when the hand operating piece moves to the open position, the moving contact bracket moves to the opening position, and when the hand operating piece moves to the closing position, the moving contact bracket moves to the closing position. The moving contact support and the center plate pass through a plurality of planes perpendicular to the first direction, The moving contact support comprises a torsion spring receiving groove and a first cutting surface, wherein the first torsion spring is received in the torsion spring receiving groove, and the first cutting surface is used to cut the torsion spring receiving groove so that the receiving groove forms an incomplete annular structure. The moving contact support is mounted to the housing via a moving contact support pivot shaft, and a force acting position of the moving contact support pivot shaft on the moving contact support is opposite to the first cut surface relative to the moving contact support pivot shaft.

2. The operating mechanism according to claim 1, wherein: The total thickness of the moving component in the first direction is less than or equal to 7.5 mm.

3. The operating mechanism according to claim 2, wherein: The total thickness of the moving component in the first direction is less than or equal to 7.3 mm.

4. The operating mechanism according to claim 1, wherein: The torsion spring accommodating groove includes a base and an arc-shaped protrusion surrounding the pivot axis of the moving contact, the base has a second surface and a third surface relative to each other, the second surface abuts against the first surface, the arc-shaped protrusion extends from the third surface in a first direction, and the first torsion spring is installed in the torsion spring accommodating groove around the arc-shaped protrusion.

5. The operating mechanism according to claim 4, wherein: The center plate further includes a boss section protruding from the first surface, the boss section including a second cut surface that conforms in shape to and is relatively adjacent to the first cut surface.

6. The operating mechanism according to claim 5, wherein: In a cross section perpendicular to the first direction, the first cut surface is a secant line of the incomplete circular ring structure of the arc-shaped protrusion.

7. An operating mechanism according to any one of the preceding claims, wherein: The transmission assembly includes a lock catch, which can be pivotally mounted to a side of the center plate opposite to the moving contact bracket and has a first mating portion. A connecting rod, both ends of which are pivotally connected to the hand-operated part and the lock buckle, A jumper, the jumper can be pivotally mounted to a side of the center plate opposite to the moving contact bracket, the jumper having a second mating portion mating with the first mating portion, Wherein, the pivot axes of the hand-operated member, the center plate, the lock buckle, the jump buckle and the moving contact bracket are parallel to the first direction, The operating mechanism is configured to enable the lock buckle and the jump buckle to be stationary relative to the center plate through cooperation between the first matching portion and the second matching portion.

8. The operating mechanism according to claim 7, wherein: The jumper is further connected to the center plate via a second torsion spring, and the second torsion spring biases the jumper relative to the center plate so that the first mating portion and the second mating portion are in abutment with each other.

9. The operating mechanism according to claim 7, wherein: When the first mating part and the second mating part are mated, the relatively static component formed by the center plate, the lock and the jump buckle, the hand operating piece, the connecting rod and the center plate and the relatively static component can constitute a four-bar mechanism, so that when the hand operating piece moves to the open position, the moving contact bracket moves to the opening position, and when the hand operating piece moves to the closed position, the moving contact bracket moves to the closing position.

10. The operating mechanism according to claim 9, wherein: When the moving contact support moves from the opening position to the closing position, the four-bar linkage formed by the hand-operated member, the connecting rod and the relatively stationary component passes through a dead point position.

11. The operating mechanism according to claim 10, wherein: The connecting rod has two sections which are angled with respect to each other.

12. The operating mechanism according to claim 7, wherein: The jumper is also provided with an extended end adjacent to the moving contact bracket, and a gap is provided between the extended end and the moving contact bracket in a plane perpendicular to the first direction.

13. The operating mechanism according to claim 12, wherein: When the extension end is actuated, the jump catch pivots relative to the center plate, so that the first mating portion and the second mating portion are disengaged, the hand-operated piece, the connecting rod, the lock catch and the center plate can form a five-bar mechanism, and the extension end can hit the moving contact bracket, so that the moving contact bracket moves toward the opening position.

14. The operating mechanism according to claim 7, wherein: The operating mechanism further comprises a trip spring, two ends of which are respectively connected to the central plate and the housing. When the hand-operated member is in the closed position, the trip spring is compressed.

15. The operating mechanism according to claim 7, wherein: The jump buckle and the lock buckle are respectively against the fourth surface and the fifth surface of the central plate, and there is a distance between the planes where the fourth surface and the fifth surface are respectively located and are both perpendicular to the first direction.

16. The operating mechanism according to claim 7, wherein: The fourth surface is further away from the first surface than the fifth surface.

17. A circuit breaker, wherein: Comprising an operating mechanism according to any one of claims 1-16.

18. The circuit breaker according to claim 17, wherein: The maximum thickness of the circuit breaker in the first direction is between 8.8 mm and 9.2 mm.

19. A backup protector, wherein: Comprising an operating mechanism according to any one of claims 1-16.

20. The backup protector according to claim 19, wherein: The maximum thickness of the backup protector in the first direction is between 8.8 mm and 9.2 mm.

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