Operating mechanism and electric device
By designing the operating mechanism of moving contact components, connectors, magnetic cores and push rods, the problem that solid-state micro circuit breakers cannot automatically trip when the button is pressed by hand, and a safe automatic tripping function is achieved.
Patent Information
- Application Number
- CN202410010699.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-03
- Publication Date
- 2025-07-04
AI Technical Summary
When the existing solid-state micro circuit breaker fails internally while the button is pressed by a hand, it cannot achieve automatic tripping operation, which poses safety risks.
An operating mechanism is designed, including a moving contact assembly, connector, magnetic core and push rod, which combines manual and automatic operation through the avoidance mechanism of the hook to ensure that it can be automatically tripped when the button is pressed by a hand.
It realizes that the button can be automatically tripped while the hand presses the button, improving safety and avoiding potential harm.
Smart Images
Figure CN120261190A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the electrical field, and particularly to an operating mechanism and an electrical device including the operating mechanism. Background Art
[0002] The mechanical tripping of a solid-state miniature circuit breaker (SSMCB) is different from that of a traditional miniature circuit breaker (MCB). The opening and closing operations of the isolating contacts can be achieved through a button and it also has an automatic opening and closing operation function at the same time. When an overload & short-circuit fault occurs inside the product, the MOSFET electronic components first perform breaking, and then the isolating contacts perform the breaking operation. The product does not generate an arc and has a short tripping time.
[0003] However, there may be potential safety hazards in existing solid-state miniature circuit breakers. The manual pressing operation of the button and the automatic opening and closing operation function cannot be carried out simultaneously. For example, if a fault occurs inside the product while a person's hand is pressing the button, and due to the hand pressing, the isolating contacts cannot perform the automatic tripping operation, there will be certain risks and hazards. Therefore, it is necessary to provide further safety protection for the situation where a person's hand is pressing the button while there is a fault inside, so that when a person's hand is pressing the button, the isolating contacts can also perform the automatic tripping operation. Summary of the Invention
[0004] The object of the present disclosure is to at least solve the disadvantages existing in the prior art. The present disclosure provides an operating mechanism, including a moving contact assembly capable of moving relative to the static contact along a first direction and a second direction opposite to the first direction; a connecting member moving together with the moving contact assembly, the connecting member having a first abutting portion facing the second direction; a magnetic core having a second abutting portion facing the first direction and capable of being driven electrically to move along the first direction; a push rod having a hook portion, the hook portion capable of being positioned between the first abutting portion and the second abutting portion. When the second abutting portion of the magnetic core applies a force along the first direction to the hook portion, the hook portion can be moved away from between the first abutting portion and the second abutting portion, so that the first abutting portion and the second abutting portion directly abut.
[0005] When the hook portion is positioned between the first abutting portion and the second abutting portion, the push rod can drive the connecting member and the moving contact assembly to move along the first direction through the abutment between the hook portion and the first abutting portion; when the first abutting portion and the second abutting portion directly abut, the magnetic core can drive the connecting member and the moving contact assembly to move along the first direction.
[0006] According to some embodiments of the present disclosure, the moving contact assembly moves between a closed position in contact with the stationary contact, an open position separated from the stationary contact, and a reset position that triggers a reset member. The open position, the closed position, and the reset position are arranged in sequence along a first direction. When the reset member is triggered, the moving contact assembly moves toward a second direction to the open position.
[0007] According to some embodiments of the present disclosure, the push rod has a columnar body extending along a first direction and a hook portion transverse to the columnar body. The columnar body has a central axis along the first direction. The hook portion is connected to an elastic member such that the hook portion can move relative to the columnar body toward or away from the central axis, and the hook portion is biased by the elastic member to a biased position where the hook portion protrudes from the columnar body away from the central axis; the connecting member is disposed upstream of the moving contact assembly and downstream of the push rod in the first direction; the magnetic core is disposed upstream of the connecting member in the first direction, such that the first abutting portion and the second abutting portion are arranged to face each other in the first direction. When the hook portion is in the biased position, it is located between the first abutting portion and the second abutting portion in the first direction. When the second abutting portion applies a force along the first direction to the hook portion, the hook portion can be made to move toward the central axis, and then the first abutting portion and the second abutting portion abut.
[0008] According to some embodiments of the present disclosure, the hook portion has a first surface facing the stationary contact and a second surface opposite to the first surface. Wherein, when the push rod is actuated to move along the first direction, the first surface abuts against the first abutting portion to drive the connecting member and the moving contact assembly to move along the first direction together. When the magnetic core is electrically driven to move along the first direction such that the second abutting portion abuts against the second surface, a force along the first direction is applied to the second surface, causing the hook portion to move toward the central axis, and then the first abutting portion and the second abutting portion abut.
[0009] According to some embodiments of the present disclosure, the second surface is inclined relative to the first surface such that when a force along the first direction is applied to the second surface, the elastic member deforms to cause the hook portion to move toward the central axis.
[0010] According to some embodiments of the present disclosure, when the first abutting portion and the second abutting portion abut, there is a gap along the first direction on the side facing the hook portion between the first abutting portion and the second abutting portion, such that when the acting force between the first abutting portion and the second abutting portion is lower than a threshold value, the hook portion can be biased back to the biased position and located between the first abutting portion and the second abutting portion.
[0011] According to some embodiments of the present disclosure, the connecting member has a first channel extending in a first direction from a first abutting portion, the magnetic core has a second channel extending in a second direction from a second abutting portion, and the push rod is at least partially inserted into the second channel in the first direction, such that when the hook portion is in a biased position, the hook portion is located between the first abutting portion and the second abutting portion in the first direction, and when the hook portion moves away from the biased position toward the central axis, it can be located within the first channel or the second channel.
[0012] According to some embodiments of the present disclosure, an elastic arm is provided at a first end of the push rod close to the stationary contact in the first direction, the elastic arm can swing relative to the columnar body toward or away from the central axis, and the hook portion is provided at a free end of the elastic arm and is biased by the elastic arm to protrude away from the central axis beyond the columnar body.
[0013] According to some embodiments of the present disclosure, the second surface is inclined relative to the first surface such that when a force in the first direction is applied to the second surface, the elastic arm deforms to swing toward the central axis.
[0014] According to some embodiments of the present disclosure, the elastic arm extends away from the stationary contact from the first end of the push rod and obliquely relative to the columnar body, and a receiving opening corresponding to the elastic arm is provided on the columnar body to allow the elastic arm to be received when the elastic arm swings toward the central axis.
[0015] According to some embodiments of the present disclosure, there are two elastic arms, which are symmetrically arranged relative to the central axis.
[0016] According to some embodiments of the present disclosure, the connecting member further includes a first segment and a second segment arranged in sequence in the second direction. A first channel in the first direction is provided inside the first segment, a receiving channel communicating with the first channel is provided inside the second segment, the second segment has a blocking portion protruding toward the central axis, the push rod is at least partially inserted into the receiving channel in the first direction, and the blocking portion can abut against the second surface of the hook portion to block the separation of the push rod from the connecting member.
[0017] According to some embodiments of the present disclosure, at least a part of the second segment extends into the second channel in the second direction, and the receiving channel is partially open to the second channel in the circumferential direction around the central axis.
[0018] According to some embodiments of the present disclosure, the second end of the push rod, which is opposite to the first end, protrudes from the end face of the magnetic core that is farthest from the static contact along a second direction, and the second end can be actuated by an external force to cause the push rod to move along a first direction.
[0019] According to some embodiments of the present disclosure, it further includes a limiting member located upstream of the second end in the first direction to limit the movement stroke of the push rod in the second direction.
[0020] The present disclosure also provides an electrical device, including any one of the above-mentioned operating mechanisms.
[0021] According to some embodiments of the present disclosure, the electrical device is a solid-state miniature circuit breaker. Description of the Drawings
[0022] Figure 1 A cross-sectional schematic view showing an operating mechanism according to an embodiment of the present disclosure, wherein the moving contact assembly is in an open state;
[0023] Figure 2 Showing according to Figure 1 A three-dimensional schematic view of the push rod in the operating mechanism of
[0024] Figure 3 Showing according to Figure 1 A three-dimensional schematic view of the connecting member in the operating mechanism of
[0025] Figure 4a Showing according to Figure 1 A three-dimensional schematic view of the magnetic core in the operating mechanism of
[0026] Figure 4b Showing according to Figure 1 A plan view of the magnetic core in the operating mechanism of
[0027] Figure 4c Showing the magnetic core from the Figure 4b Cross-sectional schematic view taken along M-M shown in
[0028] Figure 5a A cross-sectional schematic view showing an operating mechanism according to an embodiment of the present disclosure, wherein the operating mechanism is in a manually closed state;
[0029] Figure 5b Showing Figure 5a A partial enlarged view of the relative positions of the first abutting portion, the second abutting portion, and the hook portion of the operating mechanism in
[0030] Figure 6a A cross-sectional schematic view showing an operating mechanism according to an embodiment of the present disclosure, wherein the operating mechanism is in an automatically closed state;
[0031] Figure 6b Shows Figure 6a A partial enlarged view of the relative positions of the first abutting portion, the second abutting portion, and the hook portion of the operating mechanism in
[0032] Figure 7a A schematic cross-sectional view of the operating mechanism according to an embodiment of the present disclosure, where the operating mechanism is in an automatic tripping state;
[0033] Figure 7b Shows Figure 7a A partial enlarged view of the relative positions of the first abutting portion, the second abutting portion, and the hook portion of the operating mechanism in
[0034] Reference numerals
[0035] 1 Push rod, 10 Columnar main body, 11 First end, 12 Second end, 13 Elastic arm, 14 Hook portion, 141 First surface, 142 Second surface, 15 Accommodating opening
[0036] 2 Connecting member, 21 First section, 211 First abutting portion, 212 First channel, 22 Second section, 221 Accommodating channel, 222 Blocking portion,
[0037] 3 Magnetic core, 31 Second abutting portion, 32 Second channel, 33 End face 4 Moving contact assembly,
[0038] A Central axis
[0039] D1 First direction, D2 Second direction Detailed implementation manners
[0040] In order to make the objectives, solutions, and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the specific embodiments of the present disclosure. Unless otherwise specified, the terms used herein have the ordinary meanings in the art. The same reference numerals in the drawings represent the same components.
[0041] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.
[0042] For the convenience of description, in the present disclosure, the direction from the breaking position of the moving contact assembly to the closing position is designated as the first direction D1, and the direction opposite to the first direction D1 is designated as the second direction D2, asFigure 1 As shown
[0043] Figure 1 Fig. shows a cross-sectional schematic view of an operating mechanism according to an embodiment of the present disclosure, where the moving contact assembly 4 is in an open state. As Figure 1 shown, the operating mechanism includes a static contact (not shown) and a moving contact assembly 4. The static contact is disposed downstream of the moving contact assembly 4 along the first direction D1. A moving contact is provided on the moving contact assembly 4. The conduction and disconnection of the circuit are achieved through the contact and separation between the moving contact and the static contact. According to the present disclosure, the moving contact assembly 4 can move relative to the static contact along the first direction D1 and the second direction D2, thereby achieving movement between a closed position ( Figure 5a and Figure 6a the position of the moving contact assembly 4 shown), an open position ( Figure 1 and Figure 7a the position of the moving contact assembly 4 shown), and a reset position. In the closed position, the moving contact assembly 4 contacts the static contact and the circuit is conductive; in the open position, the moving contact assembly 4 separates from the static contact and the circuit is disconnected. The open position, the closed position, and the reset position are arranged in sequence along the first direction.
[0044] Next, the reset position will be described. The reset position is located downstream of the closed position along the first direction. When the moving contact assembly 4 moves further along the first direction D1 from the closed position, it can reach this reset position. The operating mechanism according to the present disclosure further includes a reset member (not shown), and the reset member is disposed downstream of the moving contact assembly 4 in the first direction. When the moving contact assembly 4 moves to this reset position, the reset member is triggered, causing the moving contact assembly 4 to move toward the second direction D2 to the open position.
[0045] Thus, the closing operation between the moving contact and the static contact can be achieved by moving the moving contact assembly 4 along the first direction D1, and the opening operation between the moving contact and the static contact can also be achieved by moving the moving contact assembly 4 along the first direction D1. Furthermore, whether it is manual pressing drive or electric drive, only one-direction (the first direction D1) actuation can achieve the closing operation and the opening operation.
[0046] To ensure the stability of the operation, a position holding mechanism is provided according to the operating mechanism of the present disclosure. When the moving contact assembly 4 moves from the breaking position along the first direction D1 to cross the closing position, the moving contact assembly 4 is held in place at the closing position by this holding mechanism, and will not be caused by the triggering of the reset member to move the moving contact assembly 4 back to the breaking position along the second direction D2, thereby ensuring the stability of the closing operation of the moving contact and the static contact. Only when the moving contact assembly 4 is held in the closing position, when moving from the closing position along the first direction D1 to the reset position, the moving contact assembly 4 can be caused by the triggering of the reset member to move the moving contact assembly 4 back to the breaking position along the second direction D2. The function of this position holding mechanism is prior art and is understood by those skilled in the art. The specific implementation manner thereof is not the focus of the present disclosure, and thus will not be further elaborated specifically.
[0047] As Figure 1 shown, the operating mechanism according to the present disclosure further includes a push rod 1, Figure 2 showing a three-dimensional schematic view of the push rod 1 in the operating mechanism according to Figure 1 . The push rod may have a columnar main body 10 extending along the first direction D1, and the columnar main body has a central axis A along the first direction D1. One end of the push rod 1 close to the static contact along the first direction D1 is the first end 11, and the end opposite to the first end 11 is the second end 12. A hook portion 14 transverse to the columnar main body 10 may be provided on the first end 12, and the hook portion 14 is connected to an elastic member such that the hook portion 14 can move relative to the columnar main body 10 toward or away from the central axis A. And the hook portion 14 is biased by the elastic member at a biased position, in which the hook portion 14 projects away from the central axis A and protrudes from the columnar main body 10. The second end can be actuated by an external force (such as being pressed by a person) to cause the push rod 1 to move along the first direction D1.
[0048] For example, the elastic member can be a spring or a torsion spring connecting the hook portion 14, or can also be an elastic arm 13 as Figure 2 shown. Both ends of the elastic arm 13 are respectively connected to the columnar main body 10 and the hook portion 14. Specifically, the elastic arm 13 can swing relative to the columnar main body 10 toward or away from the central axis A, and the hook portion 14 is provided at the free end of the elastic arm 13. For example, it can extend from the columnar main body 10 away from the static contact or toward the static contact. Thus, the hook portion 14 is driven to move relative to the columnar main body 10 toward or away from the central axis A. The elastic arm 13 is biased to project away from the central axis A and protrude from the columnar main body 10, and thus the hook portion 14 is also biased to project away from the central axis A and protrude from the columnar main body 10.
[0049] The latching portion 1 has a first surface 141 facing the static contact and a second surface 142 opposite to the first surface 141. The second surface 142 is configured such that when a force in the first direction D1 is received, the latching portion 14 moves towards the central axis A. For example, the second surface 142 can be a curved surface or an inclined surface as shown in, for example, Figure 2 so that the force in the first direction D1 received can be decomposed into a component force towards the central axis A, enabling the latching portion 1 to move from the biased position towards the central axis A. The first surface 141 is configured such that when a force in the second direction D2 is received, it does not cause or hardly causes the latching portion 1 to move towards or away from the central axis A. Thus, as described later, the push rod 1 drives the connecting member 2 to move in the first direction D1 by abutting the first surface 141 against the first abutting portion 221. When the second abutting portion 31 abuts against the second surface 142 and applies a force, the latching portion 14 moves towards the central axis A, realizing the "avoidance" function of the latching portion.
[0050] Furthermore, the elastic arm 13 extends obliquely away from the static contact from the first end 11 of the push rod 1 and relative to the columnar body 10, as shown in Figure 2 . An accommodation opening 15 corresponding to the elastic arm 13 is provided on the columnar body 10 to allow the elastic arm 13 to be accommodated when the elastic arm 13 swings towards the central axis A. This inclined arrangement away from the static contact enables the elastic arm 13 to withstand a greater force in the second direction, that is, a greater driving force can be transmitted through the first surface 141 to drive the connecting member 2, and the structure is more compact. The provision of the accommodation opening 15 allows the elastic arm 13 to undergo a greater swinging deformation towards the central axis A.
[0051] In addition, multiple elastic arms 13 can be provided. For example, as shown in Figure 2 , two elastic arms are provided to withstand a greater force, and the multiple elastic arms share the force to increase the service life of the push rod and reduce the stress intensity requirements. In particular, the multiple arms are symmetrically arranged about the central axis A, thereby sharing the force more evenly and making the load more uniform.
[0052] As shown in Figure 1 , according to the present disclosure, the operating mechanism further includes a connecting member 2. Figure 3 The perspective view of the connecting member 2 in the operating mechanism according to Figure 1 is shown. The connecting member 2 is arranged upstream of the moving contact assembly 4 and downstream of the push rod 1 in the first direction D1, and is connected to the moving contact assembly 4 to move together, especially in the first direction D1 and the second direction D2. The connecting member 2 has a first abutting portion facing the second direction D2, as shown in Figure 3 .
[0053] As shown in Figure 1 , according to the present disclosure, the operating mechanism further includes a magnetic core 3.Figure 4a Shows a three-dimensional schematic diagram of the magnetic core 3 in the operating mechanism according to Figure 1 ; Figure 4b Shows a plan view of the magnetic core 3 in the operating mechanism according to Figure 1 viewed in the second direction; Figure 4c Shows a schematic cross-sectional view of the magnetic core 3 taken along M-M shown in Figure 4b . The magnetic core 3 can be electrically driven to move in the first direction D1. The magnetic core 31 is disposed upstream of the connecting member 2 in the first direction D1, whereby the magnetic core 3 can move toward the connecting member 2. The magnetic core 3 further has a second abutting portion 31 facing the first direction D1, such that the first abutting portion 211 and the second abutting portion 31 are arranged to face each other in the first direction, as shown in Figure 1 .
[0054] As shown in Figure 1 , the push rod 1, the connecting member 2, and the magnetic core 3 are arranged such that when the hook portion 14 is in the biased position, they are located between the first abutting portion 211 and the second abutting portion 31 in the first direction D1. Thus, when the push rod 1 is actuated to move in the first direction D1 by an external force (such as being pressed by a person) as described above, the first surface 141 abuts against the first abutting portion 211 to drive the connecting member 2 and the moving contact assembly 4 to move in the first direction D1 together. According to this arrangement, when the magnetic core 3 is electrically driven to move in the first direction D1 as described above such that the second abutting portion 31 abuts against the second surface 142, a force in the first direction D1 is applied to the second surface 142, causing the hook portion 14 to move toward the central axis A to achieve "avoidance", and then the first abutting portion 211 and the second abutting portion 31 abut against each other. Since the first abutting portion 211 and the second abutting portion 31 abut against each other, a force in the first direction D1 or the second direction D2 can be transmitted between the connecting member 2 and the magnetic core 3, and the magnetic core 3, the connecting member 2, and the moving contact assembly 4 can move together in the first direction D1 or the second direction D2. Thus, manual closing operation, manual opening operation, automatic closing operation, automatic opening operation, and automatic tripping operation can be achieved, which will be described in detail in conjunction with Figures 5a - 7b below.
[0055] In addition, the first abutting portion 211 is a wall having an arc shape as shown in Figure 3 , which has an abutting surface facing the second direction, and the second abutting portion 31 can be a protruding rib as shown in Figure 4a and 4b , which has an abutting surface facing the first direction. The present disclosure does not limit the first abutting portion 211 and the second abutting portion 31, and they can be other types of abutting portions, such as fingers, tabs, ends, step portions, flanges, etc., as long as the two have surfaces for abutting against each other.
[0056] Further, when the first abutting portion 211 abuts against the second abutting portion 31, there is a gap in the direction of the first direction on the side facing the hook portion 14 between the first abutting portion 211 and the second abutting portion 31, as Figure 6b and Figure 7b shown. This gap is beneficial in that when the force between the first abutting portion 211 and the second abutting portion 31 is lower than the threshold value, the elastic force exerted by the hook portion 14 away from the central axis A at this gap can separate the first abutting portion 211 and the second abutting portion 31, and thus be biased back to the biased position, and thus be located between the first abutting portion and the second abutting portion. This gap can be achieved, for example, by providing a fillet or chamfer on one or both of the first abutting portion 211 and the second abutting portion 31 on the side facing the hook portion 14. As Figure 6b and Figure 7b shown, the second abutting portion 31 has a fillet structure, thereby forming a gap in the first direction D1 thereat. Thus, the hook portion 14 can be reset from the "avoidance" state to the biasing device, so as to be in place between the first abutting portion 211 and the second abutting portion 31, especially to ensure that, as described later, when the moving contact assembly 4 is in the open state, the hook portion 14 is always in place between the first abutting portion 211 and the second abutting portion 31.
[0057] Further, returning to Figure 3 , the connecting member 2 may further include a first section 21, and a first channel 212 extending in the first direction D1 is provided inside the first section 21, and the first channel extends from the first abutting portion 221 in the first direction D1, as Figure 1 shown. The magnetic core 3 has a second channel 32 extending from the second abutting portion 31 in the second direction D2, as Figure 4cAs shown. Thus, the push rod 1 of the catch portion 14 provided can be received in the first channel 211 and / or the second channel 32. Specifically, the push rod 1 is at least partially inserted into the second channel 32 along the first direction D1. Thus, the assembly between the push rod 1, the connecting member 2, and the magnetic core 3 and the transformation of the relative state can be achieved. In particular, the catch portion 14 can be inserted into the first abutting portion 221 and the second abutting portion 31 from the junction of the first channel 211 and the second channel 32 in the first direction D1, so that when the catch portion 14 is in the biased position, the catch portion 14 is positioned between the first abutting portion 221 and the second abutting portion 31 in the first direction D1; the catch portion 14 can move away from the biased position from between the first abutting portion 221 and the second abutting portion 31 toward the central axis A from the junction of the first channel 211 and the second channel 32 in the first direction D1 to achieve "avoidance"; when the catch portion 14 is in the "avoidance" state (moving away from the biased position toward the central axis), it can move in the first channel or the second channel to achieve the relative movement between the push rod 1, the connecting member 2, and the magnetic core 3. In addition, the structure that the push rod 1 can be received in the first channel 211 and / or the second channel 32 makes the operating mechanism more compact and saves space.
[0058] In addition, the connecting member 2 may further include a second section 22. The first section 21 and the second section 22 are arranged in sequence along the second direction D2. An accommodation channel 221 communicating with the first channel 212 is provided inside the second section 22. The second section 22 has a blocking portion 222 protruding toward the central axis A. As Figure 1 shown, the push rod 1 is at least partially inserted into the accommodation channel 221 along the first direction. The degree to which the blocking portion 222 protrudes toward the central axis A is such that when it abuts against the second surface 142 of the catch portion 14, it can block the separation of the push rod 1 from the connecting member 2. Thus, the complete separation of the push rod 1 from the connecting member 2 is prevented, thereby avoiding the situation of the failure of the operating mechanism.
[0059] In particular, at least a part of the second section 22 extends into the second channel 32 along the second direction D2, as Figure 1 shown. The accommodation channel 221 is partially cut away from the wall in the circumferential direction around the central axis A to open outward, especially to open to the second channel 32, as Figure 1 and Figure 3 shown. Thus, a space is provided for the second abutting portion 31 to abut against the first abutting portion 211 in the first direction, which is beneficial to simplifying the assembly of the connecting member 2 and the magnetic core, and at the same time ensuring the alignment of the first abutting portion 211 and the second abutting portion 31 in the first direction to prevent the circumferential relative movement and misalignment between the first abutting portion 211 and the second abutting portion 31.
[0060] As Figure 4c shown, the magnetic core 3 is through in the first direction D1, and the second channel 32 is a section of a through hole. For the convenience of description, inFigure 4c Two dashed lines are shown, and the second channel 32 is the section between the two shown dashed lines, whereby the push rod 1 can be inserted into the second channel in the first direction D1. In addition, the second end 12 of the push rod 1 opposite to the first end 11 protrudes in the second direction from the end face 33 of the magnetic core 3 that is farthest from the static contact, thereby ensuring that the second end 12 can always be actuated by an external force, and further causing the push rod 1 to move in the first direction.
[0061] In addition, the operating mechanism according to the present disclosure further includes a limiting member (not shown) located upstream of the second end 12 in the first direction D1, which limits the movement stroke of the push rod in the second direction D2, and further defines the breaking position of the moving contact assembly 4. Specifically, it is ensured that when the reset member is triggered, the limit position of the push rod 1 moving in the second direction D2 is restricted, and the moving contact assembly 4 can be further limited to be in place at the breaking position through the cooperation of the limiting member of the push rod 1 via the connecting member 2.
[0062] Next, in combination with Figures 5a - 7b it will be described in detail how the movement processes of the manual closing operation, the manual breaking operation, the automatic closing operation, the automatic breaking operation, and the automatic tripping operation are realized by the operating mechanism according to the present invention. Figure 5a A cross-sectional schematic view of the operating mechanism according to an embodiment of the present disclosure is shown, wherein the operating mechanism is in the manual closing state; Figure 5b Shown Figure 5a A partial enlarged view of the relative positions of the first abutting portion 211, the second abutting portion 31, and the hook portion 14 of the operating mechanism in
[0063] Figure 6a A cross-sectional schematic view of the operating mechanism according to an embodiment of the present disclosure is shown, wherein the operating mechanism is in the automatic closing state; Figure 6b Shown Figure 6a A partial enlarged view of the relative positions of the first abutting portion 211, the second abutting portion 31, and the hook portion 14 of the operating mechanism in Figure 7a A cross-sectional schematic view of the operating mechanism according to an embodiment of the present disclosure is shown, wherein the operating mechanism is in the automatic tripping state; Figure 7b Shown Figure 7a A partial enlarged view of the relative positions of the first abutting portion 211, the second abutting portion 31, and the hook portion 14 of the operating mechanism in
[0064] Manual closing operation: It is a process from Figure 1 the shown breaking state to Figure 5a the shown manual closing state. This process is realized by manually actuating the push rod 1. In this case, the push rod 1 is actuated to move in the first direction D1, whereby the first surface 141 abuts against the first abutting portion 211, as Figure 5bAs shown, it drives the connecting member 2 and the moving contact assembly 4 to move along the first direction D1 together.
[0065] Manual opening operation: To move from Figure 5a the manually closed state shown to Figure 1 the open state shown. This process is also achieved by manually actuating the push rod 1. In this case, the moving contact assembly 4 is in place at the closed position, and the push rod 1 is actuated to move along the first direction D1. Thus, the first surface 141 also abuts against the first abutting portion 211, as Figure 5b shown, to drive the connecting member 2 and the moving contact assembly 4 to move along the first direction D1 together from the closed position to the reset position. Until the reset member is triggered, the moving contact assembly 4 moves towards the second direction D2, and then drives the connecting member 2 to move towards the second direction D2. And the first surface 141 abuts against the first abutting portion 211, and the connecting member 2 and the push rod 1 move together until the push rod 1 is limited by the limiting member and stops. Thus, the operating mechanism returns to Figure 1 the open state shown.
[0066] Automatic closing operation: To move from Figure 1 the open state shown to Figure 6a the automatic closing state shown. This process is achieved by electrically actuating the magnetic core 3. In this case, the magnetic core 3 is electrically actuated to move along the first direction D1. Thus, when the second abutting portion 31 abuts against the second surface 142, a force along the first direction D1 is applied to the second surface 142, causing the hook portion 14 to move towards the central axis A to achieve "avoidance". Furthermore, the first abutting portion 211 abuts against the second abutting portion 31, as Figure 6b shown. Since the first abutting portion 211 abuts against the second abutting portion 31, the magnetic core 3 drives the connecting member 2 and the moving contact assembly 4 to move together along the first direction D1 until the moving contact assembly 4 is in the closed position. In this case, relative movement is generated between the magnetic core 3 and the connecting member 2 and the push rod 1, and the hook portion 14 is located in the second channel 32, as Figure 6b shown. Due to the presence of the blocking member 222, it will abut against the second surface 142 to prevent the separation of the push rod 1 and the connecting member 2. Thus, it can also drive the push rod to move a certain distance in the first direction D1.
[0067] Automatic opening operation: To move from Figure 6a the automatic closing state shown to Figure 1 the open state shown. This process is also achieved by electrically actuating the magnetic core 3. In this case, the moving contact assembly 4 is in place at the closed position, and the first abutting portion 211 abuts against the second abutting portion 31, as Figure 6b shown. The magnetic core 3 is electrically actuated to move along the first direction D1. Then, the magnetic core 3 drives the connecting member 2 and the moving contact assembly 4 to continue moving along the first direction D1 from Figure 6bmove together at the positions shown. In particular, the moving contact assembly 4 moves from the closed position to the reset position. Thereby, the reset member is triggered, and the moving contact assembly 4 moves in the second direction D2, thereby driving the connecting member 2 to move in the second direction D2. The first abutting portion 211 abuts against the second abutting portion 31, and the connecting member 2 and the magnetic core 3 move together until the magnetic core 3 is limited and stops. In this case, the push rod 1 moves relative to the connecting member 2 and the magnetic core 3, and the hook portion 14 moves relatively to the gap between the first abutting portion 211 and the second abutting portion 31 described above. At this time, since the connecting member 2 and the magnetic core 3 stop, the acting force between the first abutting portion 211 and the second abutting portion 31 is lower than the threshold value, and the elastic force exerted by the hook portion 14 away from the central axis A at this gap can separate the first abutting portion 211 and the second abutting portion 31, and thereby bias back to the biased position and thereby be located between the first abutting portion and the second abutting portion. Thus, the operating mechanism returns to Figure 1 the open state shown. In particular, each time in the open state, the hook portion 14 can move relatively to the above gap and due to the biasing force exerted by the elastic arm 13, it is ensured that: the hook portion 14 always returns to Figure 1 the position between the first abutting portion 211 and the second abutting portion 31 shown.
[0068] Automatic tripping operation: for the process of moving from Figure 5a the manually closed state shown to Figure 7a the automatic tripping state shown. This process is achieved by electrically actuating the magnetic core 3. In this case, the moving contact assembly 4 is in the closed position, and the push rod 1 is held at Figure 5a the position shown by hand pressing. The magnetic core 3 is electrically actuated to move in the first direction D1. Thereby, when the second abutting portion 31 abuts against the second surface 142, a force in the first direction D1 is applied to the second surface 142, causing the hook portion 14 to move towards the central axis A to achieve "avoidance", and then the first abutting portion 211 abuts against the second abutting portion 31, as Figure 7b shown. Since the first abutting portion 211 abuts against the second abutting portion 31, the magnetic core 3 drives the connecting member 2 and the moving contact assembly 4 to move together in the first direction D1 from Figure 5a the position shown. In particular, the moving contact assembly 4 moves from the closed position to the reset position. Thereby, the reset member is triggered, and the moving contact assembly 4 moves in the second direction D2, thereby driving the connecting member 2 to move in the second direction D2. The first abutting portion 211 abuts against the second abutting portion 31, and the connecting member 2 and the magnetic core 3 move together until the magnetic core 3 is limited and stops, thereby achieving tripping. In this case, the push rod 1 is held at Figure 5a the position shown by hand pressing and remains unchanged. The push rod 1 moves relative to the connecting member 2 and the magnetic core 3, and the hook portion 14 moves relatively to be located in the first channel 212, as Figure 7b shown.
[0069] According to the present disclosure, there is also provided an electrical device including any one of the above operating mechanisms. In particular, the electrical device is a solid-state miniature circuit breaker.
[0070] It should be understood that the above description is intended to be illustrative and not restrictive. For example, the above embodiments (and / or aspects thereof) may be used in combination with each other. Additionally, many modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the scope thereof. The functions or performances of the various elements or modules described herein are for illustrative purposes only and are in no way 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. Accordingly, the scope of the present disclosure should be determined with reference to the appended claims and the full scope of equivalents to which these claims are entitled.
[0071] In the following claims, the terms "comprising" and "wherein" are used as the plain English equivalents of the respective terms "including" and "in which". Further, in the following claims, the terms "first", "second", "third", etc. are used merely as labels and are not intended to impose numerical requirements on their objects.
Claims
1. An operating mechanism, including a static contact, a moving contact assembly capable of moving relative to the static contact along a first direction and a second direction opposite to the first direction, a connecting member moving together with the moving contact assembly, the connecting member having a first abutting portion facing the second direction, a magnetic core having a second abutting portion facing the first direction and capable of being electrically driven to move along the first direction, a push rod having a hook portion that can be positioned between the first abutting portion and the second abutting portion. When the second abutting portion of the magnetic core applies a force along the first direction to the hook portion, the hook portion can move away from between the first abutting portion and the second abutting portion, so that the first abutting portion and the second abutting portion directly abut against each other, When the hook portion is positioned between the first abutting portion and the second abutting portion, the push rod can drive the connecting member and the moving contact assembly to move along the first direction through the abutment between the hook portion and the first abutting portion; when the first abutting portion and the second abutting portion directly abut against each other, the magnetic core can drive the connecting member and the moving contact assembly to move along the first direction.
2. The operating mechanism according to claim 1, wherein, the moving contact assembly moves between a closed position in contact with the static contact, a breaking position separated from the static contact, and a reset position triggering a reset member. The breaking position, the closed position, and the reset position are arranged in sequence along the first direction. When the reset member is triggered, the moving contact assembly moves towards the second direction to the breaking position.
3. The operating mechanism according to claim 1, wherein, the push rod has a columnar main body extending along the first direction and a hook portion transverse to the columnar main body. The columnar main body has a central axis along the first direction. The hook portion is connected to an elastic member so that the hook portion can move towards or away from the central axis relative to the columnar main body, and the hook portion is biased by the elastic member at a biased position where the hook portion protrudes from the columnar main body away from the central axis, the connecting member is arranged upstream of the moving contact assembly and downstream of the push rod in the first direction, the magnetic core is arranged upstream of the connecting member in the first direction, so that the first abutting portion and the second abutting portion are arranged to face each other in the first direction, when the hook portion is in the biased position, it is located between the first abutting portion and the second abutting portion in the first direction, when the second abutting portion applies a force along the first direction to the hook portion, it can cause the hook portion to move towards the central axis, and then the first abutting portion and the second abutting portion abut against each other.
4. The operating mechanism according to claim 3, wherein, the hook portion has a first surface facing the static contact and a second surface opposite to the first surface, wherein, when the push rod is actuated to move along the first direction, the first surface abuts against the first abutting portion to drive the connecting member and the moving contact assembly to move along the first direction together, When the magnetic core is driven by electricity to move in the first direction, causing the second abutting portion to abut against the second surface, a force in the first direction is applied to the second surface, such that the hook portion moves towards the central axis, and then the first abutting portion abuts against the second abutting portion.
5. The operating mechanism according to claim 4, wherein the second surface is inclined relative to the first surface, such that when a force in the first direction is applied to the second surface, the elastic member deforms to cause the hook portion to move towards the central axis.
6. The operating mechanism according to any one of the preceding claims, wherein when the first abutting portion abuts against the second abutting portion, there is a gap in the first direction on the side facing the hook portion between the first abutting portion and the second abutting portion, such that when the acting force between the first abutting portion and the second abutting portion is lower than the threshold value, the hook portion can be biased back to the biased position and be located between the first abutting portion and the second abutting portion.
7. The operating mechanism according to claim 6, wherein the connecting member has a first channel extending in the first direction from the first abutting portion, the magnetic core has a second channel extending in the second direction from the second abutting portion, and the push rod is at least partially inserted into the second channel in the first direction, such that when the hook portion is in the biased position, the hook portion is located between the first abutting portion and the second abutting portion in the first direction, and when the hook portion moves away from the biased position towards the central axis, it can be located in the first channel or the second channel.
8. The operating mechanism according to claim 6, wherein an elastic arm is provided at the first end of the push rod close to the stationary contact in the first direction, the elastic arm can swing towards or away from the central axis relative to the columnar body, and the hook portion is provided at the free end of the elastic arm and is biased by the elastic arm to protrude away from the central axis beyond the columnar body.
9. The operating mechanism according to claim 8, wherein the elastic arm extends away from the stationary contact from the first end of the push rod and is inclined relative to the columnar body, and a receiving opening corresponding to the elastic arm is provided on the columnar body to allow the elastic arm to be received when the elastic arm swings towards the central axis.
10. The operating mechanism according to claim 8, wherein there are two elastic arms, which are symmetrically arranged relative to the central axis.
11. The operating mechanism according to claim 6, wherein the connecting member further includes a first section and a second section arranged in sequence in the second direction, a first channel in the first direction is provided inside the first section, a receiving channel communicating with the first channel is provided inside the second section, the second section has a blocking portion protruding towards the central axis, the push rod is at least partially inserted into the receiving channel in the first direction, and the blocking portion can abut against the second surface of the hook portion to block the separation of the push rod from the connecting member.
12. The operating mechanism according to claim 11, wherein At least a part of the second section extends into the second channel along a second direction, and the receiving channel is partially open to the second channel in the circumferential direction around the central axis.
13. The operating mechanism according to claim 5, wherein A second end of the push rod, which is opposite to the first end, protrudes along the second direction from an end face of the magnetic core that is farthest from the static contact, and the second end can be actuated by an external force to cause the push rod to move along the first direction.
14. The operating mechanism according to claim 13, wherein It further includes a limiting member located upstream of the second end in the first direction to limit the movement stroke of the push rod in the second direction.
15. An electrical device, comprising the operating mechanism according to any one of claims 1-14.
16. The electrical device according to claim 15, wherein the electrical device is a solid-state miniature circuit breaker.