Operating mechanism and switch device

Abstract

The present application relates to the technical field of low-voltage electrical technology, and in particular to an operating mechanism, an operating member of which is limitedly matched with a positioning structure; one end of a first transmission structure is rotationally connected with the operating member, and the other end is rotationally connected with one end of a second transmission structure through a hinged structure which is slidably arranged on a waist-shaped guide structure of a supporting structure; the other end of the second transmission structure is rotationally connected with a movable contact; the supporting structure and an actuating structure are meshingly matched, and the actuating structure rotates to release the meshing of the two; the movable contact is rotationally arranged on a third mounting structure through a waist-shaped guide structure; when the operating member drives the movable contact to be closed or disconnected with a stationary contact through the first transmission structure and the second transmission structure, the waist-shaped guide structure moves along its length direction relative to the third mounting structure; the operating mechanism has a more compact structure, occupies less space, and is beneficial to maintaining the conductive performance of the movable contact. The present application also relates to a switch device comprising the operating mechanism.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, and more specifically to an operating mechanism and a switching device including the operating mechanism. Background Technology

[0002] Miniaturization and intelligence have become the development trend of low-voltage electrical components, so that low-voltage electrical products can achieve multiple functions in the smallest possible size to meet the application needs of different occasions.

[0003] As the most basic functional module inside electrical products, the operating mechanism occupies a large proportion of the overall structural layout of electrical products. The miniaturization and compactness of the operating mechanism have become key factors in realizing the miniaturization and intelligence of electrical products. Moreover, after long-term use, an oxide film will form on the moving and stationary contacts of the contact system of low-voltage electrical appliances, which will affect the conductivity of the contact system. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an operating mechanism with a more compact structure, smaller footprint, and better performance of maintaining the conductivity of the moving contacts; it also provides a switching device with a compact structure and good conductivity of the contact system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An operating mechanism includes a positioning structure, an operating member, a support structure, and an actuation structure rotatably disposed thereon, as well as a first transmission structure, a second transmission structure, and a movable contact member; the operating member is respectively limited to the positioning structure at both ends of its swing stroke; one end of the first transmission structure is rotatably connected to the operating member; the support structure and the actuation structure are engaged; the actuation structure is driven by an external force to rotate and disengage from the support structure; the support structure includes a guide limiting structure; the other end of the first transmission structure is rotatably connected to one end of the second transmission structure through a hinge structure, and the hinge structure is slidably disposed on the guide limiting structure; the other end of the second transmission structure is rotatably connected to the movable contact member.

[0007] The movable contact includes a waist-shaped guide structure at one end, and the movable contact is rotatably mounted on the third mounting structure via the waist-shaped guide structure; when the operating member swings and drives the movable contact to close or open with the stationary contact of the switching device through the first transmission structure and the second transmission structure, the waist-shaped guide structure moves relative to the third mounting structure along its length direction.

[0008] Preferably, the actuation structure is also rotatably mounted via a third mounting structure.

[0009] Preferably, the guide limiting structure is a waist-shaped hole or a waist-shaped slot, the hinge structure is a hinge shaft, and the hinge shaft is slidingly inserted into the waist-shaped hole or the waist-shaped slot; the waist-shaped guide structure is a waist-shaped hole or a waist-shaped slot, and the third mounting structure is a third shaft.

[0010] Preferably, one end of the support structure is rotationally arranged, and the other end is engaged with the actuating structure; the rotation axes of the operating member, the support structure, and the actuating structure are located at three vertices of a triangle.

[0011] Preferably, the operating mechanism further comprises a contact spring, which applies a force to the movable contact, presses the movable contact against the stationary contact when the movable contact is closed with the stationary contact, and makes the movable contact have a tendency to swing away from the stationary contact around the third mounting structure after the movable contact is separated from the stationary contact.

[0012] Preferably, the second transmission structure is rotationally connected to the middle part of the movable contact; one end of the contact spring is fixedly arranged, and the other end is engaged with the part of the movable contact between the waist-shaped guide structure and the connection between the movable contact and the second transmission structure.

[0013] Preferably, the operating mechanism further comprises an operating member return spring, which applies a force to the operating member to make the operating member have a tendency to rotate in the opening direction.

[0014] Preferably, the operating mechanism further comprises an actuating structure return spring, which applies a force to the actuating structure to make the actuating structure have a tendency to rotate toward the support structure.

[0015] Preferably, when the operating mechanism is in the open state, there is a first gap between the support structure and the actuating structure; when the operating member swings to drive the operating mechanism to switch between the closed state and the open state, the hinge structure slides along the guide limiting structure.

[0016] Preferably, the support structure comprises a support structure locking part and a support structure driving part, the actuating structure comprises an actuating structure locking part and an actuating structure driven part, the support structure locking part and the actuating structure locking part are overlapped to engage the support structure and the actuating structure, after the support structure and the actuating structure are disengaged, the hinge structure drives the support structure to rotate, the support structure drives the actuating structure driven part to make the actuating structure swing away from the support structure, and the support structure driving part and the actuating structure driven part cooperate to limit the actuating structure at the tripping position.

[0017] Preferably, the support structure locking part and the actuating structure locking part are two overlapped planes; the support structure driving part is an arc-shaped surface connected to one end of the support structure locking part by bending, and the actuating structure driven part is an inclined surface.

[0018] Preferably, when the support structure and the actuation structure are engaged, the torque applied by the hinge structure to the support structure is equal in magnitude and opposite in direction to the torque applied by the actuation structure to the support structure; the lever arm of the force applied by the actuation structure to the support structure is greater than the lever arm of the force applied by the hinge structure to the support structure.

[0019] Preferably, the lever arm of the force exerted by the actuating structure on the supporting structure is 6 times the lever arm of the force exerted by the hinged structure on the supporting structure.

[0020] Preferably, the operating element, the first transmission structure, the second transmission structure, and the support structure are all located on the same side of the actuation structure and the movable contact element.

[0021] A switching device includes the aforementioned operating mechanism and a stationary contact that cooperates with a movable contact.

[0022] Preferably, the switching device further includes a short-circuit protection mechanism and an overload protection mechanism, which respectively cooperate with the actuation structure to drive it to rotate, thereby disengaging the actuation structure from the support structure.

[0023] The operating mechanism of this invention adopts a cam-five-bar linkage, which is more compact and smaller in size compared to the existing four-bar linkage operating mechanism. When the movable contact and the stationary contact of the switching device are closed, the waist-shaped hole of the contact moves relative to the third mounting structure. The movable contact rotates about the connection between the second transmission structure and the movable contact as an axis, so that the movable contact slides relative to the stationary contact. This can effectively remove the oxide film on the surface of the movable contact and the stationary contact, and maintain the conductivity of the movable contact.

[0024] The present invention provides a switching device, which includes the aforementioned operating mechanism, and has a compact structure and a contact system with good conductivity. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the principle structure of the switching device of the present invention, with the switching device in the closed state;

[0026] Figure 2 This is a schematic diagram of the principle structure of the switching device of the present invention, with the switching device in the open state;

[0027] Figure 3 This is a schematic diagram of the principle structure of the switching device of the present invention, with the switching device in the tripped state. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-3 The given embodiments further illustrate specific implementations of the switching device of the present invention. The switching device of the present invention is not limited to the descriptions of the following embodiments.

[0029] As Figures 1-3 shown, the switch device of the present application comprises an operating mechanism and a stationary contact 8, the operating mechanism comprises a movable contact 6 used in cooperation with the stationary contact 8, the movable contact 6 and the stationary contact 8 constitute a contact system, the operating mechanism drives the movable contact 6 to swing to close or disconnect with the stationary contact 8, so as to close or disconnect the contact system, that is, to close or disconnect the switch device.

[0030] As Figures 1-3 shown, the operating mechanism comprises a positioning structure, the operation member 2, the support structure 4 and the actuating structure 5 are rotatably arranged, and the first transmission structure 3, the second transmission structure 7 and the movable contact 6; the operation member 2 is limitedly matched with the positioning structure at both ends of its swing stroke; one end of the first transmission structure 3 is rotatably connected with the operation member 2, the support structure 4 and the actuating structure 5 are meshingly matched, the actuating structure 5 is driven to rotate by external force to release the meshing with the support structure 4, the support structure 4 comprises a guide limiting structure 4-2, the other end of the first transmission structure 3 is rotatably connected with one end of the second transmission structure 7 through a hinged structure and the hinged structure is slidably arranged on the guide limiting structure 4-2, the other end of the second transmission structure 7 is rotatably connected with the movable contact 6; the movable contact 6 comprises a waist-shaped guide structure 6-1 arranged at one end thereof, the movable contact 6 is rotatably arranged on the third mounting structure 5s through the waist-shaped guide structure 6-1; when the operation member 2 swings and drives the movable contact 6 to close or disconnect with the stationary contact 8 of the switch device through the first transmission structure 3 and the second transmission structure 7, the waist-shaped guide structure 6-1 moves along its length direction relative to the third mounting structure 5s. Further, the second transmission structure 7 is rotatably connected with the middle part of the movable contact 6, and the free end of the movable contact 6 is matched with the stationary contact 8 of the switch device.

[0031] The operating mechanism is applied to the switch device, adopts a cam-five-link mechanism, compared with the existing four-link operating mechanism, the structure is more compact and the volume is smaller; after the movable contact and the stationary contact of the switch device are closed, the contact waist-shaped hole moves relative to the third mounting structure, the movable contact rotates with the connection between the second transmission structure and the movable contact as the shaft, so that the movable contact slides relative to the stationary contact, which can effectively remove the oxidation film on the surface of the movable contact and the stationary contact, and maintain the conductive performance of the movable contact.

[0032] As Figures 1-3 shown, the actuating structure 5 is also rotatably arranged through the third mounting structure 5s.

[0033] As Figures 1-3As shown in the figure, the guide limiting structure 4-2 is a waist-shaped hole or a waist-shaped slot; the hinged structure is a hinged shaft, which is slidingly inserted into the waist-shaped hole or the waist-shaped slot. Further, the support structure 4 is rotationally arranged at one end and is engaged with the actuating structure 5 at the other end, and the middle part is provided with the guide limiting structure 4-2.

[0034] As shown in the figure, Figures 1-3 the waist-shaped guide structure 6-1 is a contactor waist-shaped hole or a contactor waist-shaped slot, and the third mounting structure 5s is a third shaft. In the switch device of the present application, the waist-shaped guide structure 6-1 is preferably a contactor waist-shaped hole, which is sleeved on the third shaft.

[0035] As shown in the figure, Figures 1-3 the operating mechanism further comprises a contactor spring, which applies a force to the movable contact 6 to make the movable contact 6 press the stationary contact 8 when the movable contact 6 is closed with the stationary contact 8, and to make the movable contact 6 have a tendency to swing away from the stationary contact 8 around the third mounting structure 5s after the movable contact 6 is disconnected with the stationary contact 8. Further, one end of the contactor spring is fixedly arranged, and the other end is engaged with the part of the movable contact 6 between the waist-shaped guide structure 6-1 and the connection between the movable contact 6 and the second transmission structure 7.

[0036] Specifically, as shown in the figure, Figure 1 the contactor spring is a torsion spring, which is sleeved on the third shaft (i.e., the third mounting structure 5s), one end of which is fixedly arranged, and the other end of which is limitingly engaged with the movable contact 6; the second transmission structure 7 is rotationally connected with the middle part of the movable contact 6 around the third rotation center 6-7m; when the movable contact 6 is closed with the stationary contact 8, the contactor spring applies a force to the movable contact 6 to make the movable contact 6 have a tendency to rotate clockwise around the third rotation center 6-7m to press the stationary contact 8; as shown in the figure, Figure 2 after the movable contact 6 is disconnected with the stationary contact 8, the left end of the contactor waist-shaped hole (i.e., the waist-shaped guide structure 6-1) is limitingly engaged with the third shaft, and the contactor spring applies a force to the movable contact 6 to make the movable contact 6 have a tendency to swing away from the stationary contact 8 (preferably counterclockwise) around the third shaft.

[0037] As other embodiments, the contactor spring can also be a tension spring or a compression spring.

[0038] The operating mechanism further comprises an operating member reset spring, which applies a force to the operating member 2 to make the operating member 2 have a tendency to rotate in the opening direction. Specifically, as shown in the figure, Figures 1-3 the operating member reset spring makes the operating member 2 have a tendency to rotate counterclockwise.

[0039] The operating mechanism further comprises an actuating structure reset spring, which applies a force to the actuating structure 5, so that the actuating structure 5 has a tendency to rotate towards the supporting structure 4, thereby ensuring reliable engagement between the supporting structure 4 and the actuating structure 5 and providing a reset force for the reclosing of the actuating structure 5 and the supporting structure 4. Specifically, as shown in Figures 1-3 the actuating structure reset spring makes the actuating structure 5 have a tendency to rotate clockwise. Further, the actuating structure reset spring is a torsion spring, which is sleeved on the third shaft and fixed at one end and cooperates with the actuating structure 5 at the other end.

[0040] As shown in Figures 1-3 the switch device of the present application further comprises contact piece limiting structures 1-6, which limit the movable contact piece 6 after the movable contact piece 6 and the stationary contact piece 8 are disconnected. The contact piece limiting structures 1-6 and the stationary contact piece 8 are respectively located on both sides of the movable contact piece 6. Specifically, as shown in Figure 2 the contact spring applies a force to the movable contact piece 6 after the movable contact piece 6 and the stationary contact piece 8 are disconnected, so that the movable contact piece 6 abuts against the contact piece limiting structures 1-6.

[0041] As shown in Figure 2 when the operating mechanism is in the open state, there is a first gap between the supporting structure 4 and the actuating structure 5; when the operating member 2 swings to drive the operating mechanism to switch between the closed state and the open state, the hinged structure slides along the guide limiting structure 4-2.

[0042] As shown in Figure 1 and 2 when the operating member 2 swings to the closed direction to drive the operating mechanism to close, the operating member 2 first drives the supporting structure 4 to rotate to engage with the actuating structure 5 through the hinged structure, and then the supporting structure 4 and the actuating structure 5 remain engaged and stationary until the operating member 2 drives the movable contact piece 6 to the closed position through the first transmission structure 3 and the second transmission structure 7; when the operating member 2 swings to the open direction to drive the operating mechanism to open, the supporting structure 4 and the actuating structure 5 remain engaged and stationary until the operating member 2 drives the movable contact piece 6 to the disconnected position through the first transmission structure 3 and the second transmission structure 7, and then the operating member 2 drives the supporting structure 4 to rotate relative to the actuating structure 5 through the hinged structure, so that the supporting structure 4 and the actuating structure 5 form a first gap. Further, as shown in the direction of Figures 1-3 the closed direction is the clockwise direction, and the open direction is the counterclockwise direction.

[0043] When the operating mechanism is closed or opened, the supporting structure 4 and the actuating structure 5 remain engaged and stationary during the rotation of the movable contact piece 6, which greatly improves the reliability of the entire operating mechanism.

[0044] Combining Figure 1 and 3 As shown in the figure, when the operating mechanism is in the closed state, the actuating structure 5 is driven to rotate by external force to release the locking cooperation with the supporting structure 4, the hinged structure drives the supporting structure 4 to rotate, the supporting structure 4 drives the actuating structure 5 to swing away from the supporting structure 4 and limits the actuating structure 5 in the tripping position.

[0045] As shown in the figure, Figure 3 The supporting structure 4 includes an actuating structure positioning part 4-0 and an actuating structure driving part 4-1, and the actuating structure 5 includes an actuating structure locking part 5-0 and an actuating structure driven part 5-1. The supporting structure locking part 4-0 and the actuating structure locking part 5-0 overlap to engage the supporting structure 4 and the actuating structure 5. After the supporting structure 4 and the actuating structure 5 are disengaged, the hinged structure drives the supporting structure 4 to rotate, the supporting structure 4 drives the actuating structure driven part 5-1 through the supporting structure driving part 4-1 to make the actuating structure 5 swing away from the supporting structure 4, and the supporting structure driving part 4-1 and the actuating structure driven part 5-1 cooperate to limit the actuating structure 5 in the tripping position. A first gap is formed between the supporting structure locking part 4-0 and the actuating structure locking part 5-0 when the operating mechanism is in the open state.

[0046] As shown in the figure, Figure 3 The supporting structure locking part 4-0 and the actuating structure locking part 5-0 are two overlapping planes; the supporting structure driving part 4-1 is an arc-shaped surface connected to one end of the supporting structure locking part 4-0, and the actuating structure driven part 5-1 is an inclined surface, which is inclined from one end close to the actuating structure locking part 5-0 to the other end of the inclined surface to the direction of the supporting structure 4.

[0047] Specifically, as shown in the figure, Figure 1 When the switch device is in the closed state, the movable contact 6 is closed with the stationary contact 8, the actuating structure 5 is swung counterclockwise by external force, the actuating structure 5 is released from the locking cooperation with the supporting structure 4, that is, the supporting structure locking part 4-0 and the actuating structure locking part 5-0 are disengaged, the hinged structure drives the supporting structure 4 to rotate clockwise, the supporting structure 4 drives the actuating structure 5 to continue to rotate counterclockwise while rotating, and after the movable contact 6 reaches the breaking position, the supporting structure 4 no longer rotates and finally limits the actuating structure 5 in the tripping position through the limiting cooperation of the supporting structure driving part 4-1 and the actuating structure driven part 5-1.

[0048] As shown in the figure, Figures 1-3As shown, the moment exerted on the support structure 4 by the hinged structure is equal in magnitude and opposite in direction to the moment exerted on the support structure 4 by the actuating structure 5 when the support structure 4 is in engagement with the actuating structure 5; the force arm of the force exerted on the support structure 4 by the actuating structure 5 is greater than the force arm of the force exerted on the support structure 4 by the hinged structure; due to the above-mentioned structural design, the force exerted on the support structure 4 by the actuating structure 5 is reduced, thereby reducing the resistance when the support structure 4 and the actuating structure 5 disengage, and reducing the tripping force of the operating mechanism. Further, the force arm of the force exerted on the support structure 4 by the actuating structure 5 is 6 times the force arm of the force exerted on the support structure 4 by the hinged structure.

[0049] Specifically, as shown in Figures 1-3 As shown, the moment exerted on the support structure 4 by the actuating structure 5 makes the support structure 4 have a tendency to rotate counterclockwise, and the moment exerted on the support structure 4 by the hinged structure makes the support structure 4 have a tendency to rotate clockwise.

[0050] As shown in Figures 1-3 The operating member 2 is arranged to rotate around a first axis 2s, and the support structure 4 is arranged to rotate around a second axis 4s. Further, as shown in Figures 1-3 The rotation axes of the operating member 2, the support structure 4 and the actuating structure 5 are arranged in parallel and at intervals and at three vertices of a triangle. Further, as shown in Figures 1-3 As shown, one end of the support structure 4 is arranged to rotate around the second axis 4s, the middle part is provided with a guide limiting structure 4-2, and the other end is provided with a support structure locking part 4-0 and a support structure driving part 4-1; one end of the actuating structure 5 is arranged to rotate around a third axis 5s, and the other end is provided with an actuating structure locking part 5-0 and a locking structure driven part 5-1.

[0051] Specifically, the first axis 2s, the second axis 4s and the third axis (i.e. the third mounting structure 5s) are respectively fixed on a structure of a mounting site housing or a bracket accommodating and mounting the operating mechanism.

[0052] As shown in Figures 1-3 The operating member connecting part 2-1 of the operating member 2 is connected to one end of the first transmission structure 3 around a first rotation center 2-3m, and the other end of the first transmission structure 3 is connected to one end of the second transmission structure 7 around a second rotation center 3-7m, i.e. the axis of the hinged structure is the second rotation center 3-7m.

[0053] As shown in Figures 1-3As shown, the operating member 2 comprises an operating member mounting portion, and an operating member operating portion 2-0 and an operating member connecting portion 2-1 connected to the operating member mounting portion respectively, the operating member mounting portion is rotatably arranged around the first shaft 2s, the operating member operating portion 2-0 is limited and matched with the positioning structure at both ends of the swing stroke of the operating member 2 respectively, and the operating member connecting portion 2-1 is rotatably connected to one end of the first transmission structure 3. Further, as shown in Figures 1-3 As shown, the positioning structure comprises a first positioning structure 1-0 and a second positioning structure 1-1, and is limited and matched with the operating member operating portion 2-0 at both ends of the swing stroke of the operating member 2 respectively. Specifically, the first positioning structure 1-0 and the second positioning structure 1-1 can be separately arranged structures, or structures on the mounting position shell or bracket for accommodating and mounting the operating mechanism.

[0054] The principle of the cam-five-bar mechanism of the operating mechanism will be described below:

[0055] As shown in Figures 1-2 The operating mechanism, the positioning structure, the operating member 2, the first transmission structure 3, the second transmission structure 7 and the movable contact 6 constitute a five-bar mechanism with two free ends, because the hinged structure is guided and limited by the guide limiting structure 4-2 of the supporting structure 4 and slides thereon, one degree of freedom of the five-bar mechanism is limited, and thus a cam-five-bar transmission mechanism with one degree of freedom is obtained. As shown in Figure 2 As shown, the operating mechanism is in the open state, the operating member operating portion 2-0 of the operating member 2 is limited and matched with the first positioning structure 1-0, the movable contact 6 and the stationary contact 8 are in the open state, the first gap is formed between the supporting structure locking portion 4-0 and the actuating structure locking portion 5-0 to ensure that the supporting structure 4 and the actuating structure 5 can be reliably buckled when the switch device is closed, the left end of the contact waist hole (i.e. the waist guide structure 6-1) of the movable contact 6 is matched with the third shaft (the third mounting structure 5s), and the third shaft serves as the rotation center of the movable contact 6. As shown in Figure 1 As shown, the operating mechanism is in the closed state, the operating member operating portion 2-0 of the operating member 2 is limited and matched with the second positioning structure 1-1, the movable contact 6 and the stationary contact 8 are in the closed state, the supporting structure locking portion 4-0 and the actuating structure locking portion 5-0 are overlapped and matched, the contact waist hole of the movable contact 6 moves relative to the third shaft, and the third rotation center 6-7m serves as the rotation center of the movable contact 6. As shown in Figure 1As shown, the actuating structure 5 is driven by an external force to rotate away from the supporting structure 4, causing the actuating structure 5 to disengage from the supporting structure 4. The cam-five-bar linkage is transformed into a six-bar linkage with two degrees of freedom. The contact spring drives the movable contact 6 to move to the disconnected position and engages with the contact limiting structure 1-6. At the same time, the hinge structure drives the supporting structure 4 to rotate. The supporting structure 4, through the cooperation of the supporting structure driving part 4-1 and the actuating structure driven part 5-1, drives the actuating structure 5 to swing away from the supporting structure 4. The supporting structure driving part 4-1 engages with the actuating structure driving part 5-1, ultimately locking the actuating structure 5 in the disengaged position, allowing the operating mechanism to enter the disengaged position. Figure 3 The tripped state is shown.

[0056] The switching device of the present invention also includes a short-circuit protection mechanism and an overload protection mechanism, which are driven and cooperate with the actuation structure 5 respectively, so that when a short circuit or overload fault occurs, the actuation structure 5 is driven to rotate to disengage from the support structure 4, thereby disengaging the operating mechanism.

[0057] like Figures 1-3 As shown, this is one layout of the switching device of the present invention: the rotation axes of the operating member 2, the support structure 4, and the actuation structure 5 are respectively located at the three vertices of a triangle; one end of the actuation structure 5 and the movable contact 6 are rotatably mounted on the first mounting structure 5s, and the actuation structure 5 and the movable contact 6 are stacked along the thickness direction of the switching device, with the included angle between the axes of the actuation structure 5 and the movable contact 6 always being an acute angle; the operating member 2, the first transmission structure 3, the second transmission structure 7, and the support structure 4 are all located on the same side of the actuation structure 5 and the movable contact 6, and the second transmission structure 7 intersects the actuation structure 5 in space. Furthermore, one end of the actuation structure 5 that cooperates with the support structure 4 is also driven to cooperate with a short-circuit protection mechanism and an overload protection mechanism, respectively. The short-circuit protection mechanism, the stationary contact 8, the operating member 2, the first transmission structure 3, and the support structure 4 are all located on one side of the movable contact 6 and the actuation structure 5, and the overload protection mechanism is located on the other side of the movable contact 6 and the actuation structure. Specifically, as shown... Figures 1-3 In the indicated direction, the operating element 2, the first transmission structure 3, the support structure 4, the stationary contact element 8, and the short-circuit protection mechanism are all located to the left of the movable contact element 6 and the actuation structure 5, while the overload protection mechanism is located to the right of the movable contact element 6 and the actuation structure 5.

[0058] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An operating mechanism comprising a positioning structure, an operating member (2), a supporting structure (4) and an actuating structure (5) arranged in rotation respectively, and a first transmission structure (3), a second transmission structure (7) and a movable contact member (6); the operating member (2) is limitedly engaged with the positioning structure at both ends of its swing stroke respectively; one end of the first transmission structure (3) is rotatably connected with the operating member (2), the supporting structure (4) and the actuating structure (5) are engaged, the actuating structure (5) is driven to rotate by an external force to disengage from the supporting structure (4), the supporting structure (4) comprises a guide limiting structure (4-2), the other end of the first transmission structure (3) is rotatably connected with one end of the second transmission structure (7) through a hinged structure and the hinged structure is slidably arranged on the guide limiting structure (4-2), the other end of the second transmission structure (7) is rotatably connected with the movable contact member (6); characterized in that the movable contact member (6) comprises a waist-shaped guide structure (6-1) arranged at one end thereof, the movable contact member (6) is rotatably arranged on a third mounting structure (5s) through the waist-shaped guide structure (6-1), the second transmission structure (7) is rotatably connected with the middle part of the movable contact member (6), and the other end of the movable contact member (6) is used for engaging with a stationary contact member (8) of a switch device; the actuating structure (5) is also rotatably arranged through the third mounting structure (5s); when the operating member (2) swings and drives the movable contact member (6) to close or break the stationary contact member (8) through the first transmission structure (3) and the second transmission structure (7), the waist-shaped guide structure (6-1) moves along its length direction relative to the third mounting structure (5s); the operating mechanism further comprises a contact member spring, one end of the contact member spring is fixedly arranged, and the other end of the contact member spring is engaged with a part of the movable contact member (6) between the waist-shaped guide structure (6-1) and the connection between the movable contact member (6) and the second transmission structure (7); the contact member spring applies a force to the movable contact member (6), which presses the stationary contact member (8) when the movable contact member (6) is closed with the stationary contact member (8), and makes the movable contact member (6) have a tendency to swing away from the stationary contact member (8) around the third mounting structure (5s) after the movable contact member (6) is broken from the stationary contact member (8); the rotation axes of the operating member (2), the supporting structure (4) and the actuating structure (5) are located at three vertices of a triangle respectively; the operating member (2), the first transmission structure (3) and the supporting structure (4) are located on the same side of the movable contact member (6) and the actuating structure (5).

2. The operating mechanism of claim 1, wherein: The guide limiting structure (4-2) is a waist-shaped hole or a waist-shaped groove, the hinged structure is a hinged shaft, and the hinged shaft is slidably inserted in the waist-shaped hole or the waist-shaped groove; the waist-shaped guide structure (6-1) is a waist-shaped hole or a waist-shaped groove, and the third mounting structure (5s) is a third shaft.

3. The operating mechanism of claim 1, wherein: One end of the supporting structure (4) is rotatably arranged, and the other end is engaged with the actuating structure (5).

4. The operating mechanism of claim 1, wherein: The operating mechanism further comprises an operating member reset spring, which applies a force to the operating member (2) to make the operating member (2) have a tendency to rotate in the opening direction.

5. The operating mechanism of claim 1, wherein: The operating mechanism further comprises an actuating structure reset spring, which applies a force to the actuating structure (5) to make the actuating structure (5) have a tendency to rotate towards the support structure (4).

6. The operating mechanism of claim 1, wherein: When the operating mechanism is in the opening state, there is a first gap between the support structure (4) and the actuating structure (5); when the operating member (2) swings to drive the operating mechanism to switch between the closing state and the opening state, the hinged structure slides along the guide limiting structure (4-2).

7. The operating mechanism of claim 6, wherein: The support structure (4) comprises a support structure locking portion (4-0) and a support structure driving portion (4-1), and the actuating structure (5) comprises an actuating structure locking portion (5-0) and an actuating structure driven portion (5-1); the support structure locking portion (4-0) and the actuating structure locking portion (5-0) are overlapped to make the support structure (4) and the actuating structure (5) engage with each other; after the support structure (4) and the actuating structure (5) are disengaged, the hinged structure drives the support structure (4) to rotate, the support structure (4) drives the actuating structure driven portion (5-1) through the support structure driving portion (4-1) to make the actuating structure (5) swing away from the support structure (4), and the support structure driving portion (4-1) and the actuating structure driven portion (5-1) cooperate to limit the actuating structure (5) at the tripping position.

8. The operating mechanism of claim 7, wherein: The support structure locking portion (4-0) and the actuating structure locking portion (5-0) are two overlapped planes; the support structure driving portion (4-1) is an arc-shaped surface connected to one end of the support structure locking portion (4-0) by bending, and the actuating structure driven portion (5-1) is an inclined surface.

9. The operating mechanism of claim 1, wherein: When the support structure (4) and the actuating structure (5) engage with each other, the moment applied to the support structure (4) by the hinged structure is equal in magnitude and opposite in direction to the moment applied to the support structure (4) by the actuating structure (5); the force arm of the force applied to the support structure (4) by the actuating structure (5) is greater than the force arm of the force applied to the support structure (4) by the hinged structure.

10. The operating mechanism of claim 9, wherein: The force arm of the force applied to the support structure (4) by the actuating structure (5) is 6 times the force arm of the force applied to the support structure (4) by the hinged structure.

11. The operating mechanism of claim 3, wherein: The operating member (2), the first transmission structure (3), and the support structure (4) are all arranged on the left side of the movable contact (6) and the actuating structure (5); the left end of the second transmission structure (7) is hinged to the first transmission structure (3); the upper end of the movable contact (6) is provided with a waist-shaped guide structure (6-1), and the lower end cooperates with the stationary contact (8); the upper end of the actuating structure (5) is rotationally arranged through the third mounting structure (5s), and the lower end is used for cooperating with the short-circuit protection mechanism and the overload protection mechanism respectively located on the left and right sides of the actuating structure (5); the left end of the support structure (4) is rotationally arranged, and the right end engages with the actuating structure (5).

12. A switching device, characterized by It comprises the operating mechanism according to any one of claims 1-11 and a stationary contact (8) cooperating with the movable contact (6).

13. The switching device of claim 12, wherein: The switch device further comprises a short-circuit protection mechanism and an overload protection mechanism, which respectively drive the actuating structure (5) to rotate to disengage the actuating structure (5) from the supporting structure (4).

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