Operating mechanism and switch device

Abstract

This invention relates to the field of low-voltage electrical technology, specifically to an operating mechanism. A handle, a jump-lock, and a locking mechanism are rotatably mounted on a housing. A first connecting rod includes a first end and a second end, the first end of which is rotatably connected to the handle. The jump-lock includes a jump-lock guide structure, the second end of which is hinged to one end of a second connecting rod and slidably mounted on the jump-lock guide structure. The jump-lock and the locking mechanism are engaged. The locking mechanism is driven by an external force to rotate, thus releasing its engagement with the jump-lock. The moving contact includes a contact slot at one end, and is rotatably mounted on a first mounting shaft on the housing through the contact slot. The other end of the second connecting rod is rotatably connected to the moving contact. The operating mechanism is compact, occupies little space, and improves the conductivity of the moving contact. This invention also relates to a switching device including the operating mechanism, which has a compact internal structure and a contact system with good conductivity.

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] Most existing miniature circuit breakers adopt a four-bar linkage operating mechanism, with components scattered and limited space fragmented, which cannot be effectively utilized and restricts the development of multi-functional products. Moreover, after long-term use, an oxide film will form on the surface of the moving and stationary contacts of existing miniature circuit breakers, affecting the conductivity of the contact system. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an operating mechanism that is compact in structure, occupies little space, and is beneficial to improving the conductivity of the moving contact; it also provides a switching device including the operating mechanism, which has a compact internal structure and good conductivity of the contact system.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An operating mechanism includes a handle, a trip latch, a locking latch, a first link, a second link, and a moving contact, all disposed within a housing of a switching device. The handle, trip latch, and locking latch are rotatably mounted on the housing. The first link includes a first end and a second end, the first end of which is rotatably connected to the handle. The trip latch includes a trip latch guide structure, the second end of which is hinged to one end of the second link and slidably mounted on the trip latch guide structure. The trip latch and the locking latch are engaged, and the locking latch is rotated by an external force to disengage from the trip latch. The moving contact includes a contact waist-shaped hole at one end, and is rotatably mounted on a first mounting shaft on the housing through the contact waist-shaped hole. The other end of the second link is rotatably connected to the moving contact.

[0006] Preferably, the locking element is also rotatably mounted on the housing via the first mounting shaft.

[0007] Preferably, the operating mechanism further includes a contact spring, which applies a force to the moving contact, causing the moving contact to press against the stationary contact when the moving contact closes with the stationary contact of the switching device, and causing the moving contact to swing away from the stationary contact around the first mounting axis after the moving contact separates from the stationary contact.

[0008] Preferably, the second connecting rod is rotatably connected to the middle of the moving contact; one end of the contact spring is engaged with the portion of the moving contact located between the contact waist-shaped hole and the connection between the moving contact and the second connecting rod, and the other end is engaged with the outer casing.

[0009] Preferably, the operating mechanism further includes a handle spring, which applies a force to the handle, causing the handle to tend to rotate in the opening direction.

[0010] Preferably, the rotation centers of the handle, the jump fastener, and the locking fastener are located at the three vertices of a triangle; one end of the jump fastener and the locking fastener are rotatably mounted on the outer shell, and the other ends of the jump fastener and the locking fastener are engaged.

[0011] Preferably, the guide rail structure of the jump fastener is a sliding hole or sliding groove provided on the jump fastener; the first connecting rod is a U-shaped connecting rod, which includes two connecting rod arms arranged opposite to each other, namely a first end of the connecting rod and a second end of the connecting rod, and the second end of the connecting rod is slidably inserted into the sliding hole or sliding groove.

[0012] Preferably, when the moving contact and the stationary contact of the switching device are closed, the torque applied by the second end of the connecting rod to the jump fastener is opposite in direction and equal in magnitude to the torque applied by the locking fastener to the jump fastener, and the lever arm of the force applied by the locking fastener to the jump fastener is greater than the lever arm of the force applied by the second end of the connecting rod to the jump fastener.

[0013] Preferably, when the moving contact and the stationary contact are closed, the lever arm of the force applied by the locking member to the jumping member is 6 times the lever arm of the force applied by the second end of the connecting rod to the jumping member.

[0014] Preferably, when the operating mechanism is in the open state, there is a first gap between the trip fastener and the locking fastener; when the handle drives the operating mechanism to switch between the closed state and the open state, the second end of the connecting rod slides along the trip fastener guide rail structure.

[0015] Preferably, when the operating mechanism is in the closed state, the locking element is driven by an external force to rotate, thereby disengaging it from the tripping element. The second end of the connecting rod drives the tripping element to rotate, while the tripping element drives the locking element to swing away from the tripping element.

[0016] Preferably, the jump fastener includes a jump fastener mating part, which includes a jump fastener locking surface and a jump fastener driving surface; the locking fastener includes a locking fastener mating part, which includes a locking fastener locking surface and a locking fastener driven surface; the jump fastener locking surface and the locking fastener locking surface overlap to make the jump fastener and the locking fastener engage; the jump fastener driving surface and the locking fastener driven surface drive each other to drive the locking fastener mating part to swing away from the jump fastener.

[0017] Preferably, the driving surface of the jump fastener is an arc-shaped surface, one end of which is bent and connected to one end of the locking surface of the jump fastener; on the side projection of the jump fastener, the line connecting the rotation center of the jump fastener and the arc-shaped surface is Line1, which passes through the center of the arc-shaped surface, and the line connecting the rotation center of the jump fastener and the connection point of the locking surface and the driving surface of the jump fastener is Line2, and the length of Line1 is greater than the length of Line2.

[0018] Preferably, the locking component further includes a locking component main board, with a locking component mating part disposed at one end of the locking component main board. One end of the locking component main board is rotatably mounted on the housing, and the other end is driven and mated with the short-circuit protection mechanism and / or overload protection mechanism of the switching device.

[0019] Preferably, the locking component further includes a locking component linkage shaft and a locking component linkage hole, which are respectively disposed on both sides of the locking component main board; the locking component linkage shaft or locking component linkage hole cooperates with the locking component linkage hole or locking component linkage shaft of the adjacent operating mechanism locking component.

[0020] Preferably, the second link includes two symmetrically arranged link arms, one end of each link arm is located on both sides of the jump fastener and is rotatably connected to the second end of the link, and the other end of each link arm is located on both sides of the moving contact 6a and is rotatably connected to the moving contact 6a.

[0021] Preferably, the handle, the first connecting rod, and the jump fastener are all located on the same side as the moving contact and the locking fastener.

[0022] A switching device comprising the aforementioned operating mechanism.

[0023] Preferably, the switching device further includes a stationary contact that cooperates with the moving contact, as well as a short-circuit protection mechanism and an overload protection mechanism; the short-circuit protection mechanism, the stationary contact, the handle, the first connecting rod, and the locking element are all disposed on one side of the moving contact and the locking element, and the overload protection mechanism is disposed on the other side of the moving contact and the locking element.

[0024] 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 moving contact and the stationary contact of the switching device are closed, the contact waist-shaped hole moves relative to the first mounting shaft, and the moving contact rotates around the hinge shaft, so that the moving contact slides relative to the stationary contact. This can effectively remove the oxide film on the surface of the moving contact and the stationary contact and improve the conductivity of the contact system.

[0025] The present invention provides a switching device, which includes the aforementioned operating mechanism, and has a compact internal structure and a contact system with good conductivity. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the switching device of the present invention, with the switching device in the closed state;

[0027] Figure 2 This is a three-dimensional structural diagram of the switching device of the present invention, with the switching device in the closed state;

[0028] Figure 3 This is a schematic diagram of the structure of the switching device of the present invention. The switching device is in the closed state, showing the cooperation relationship between the trip fastener and the locking fastener.

[0029] Figure 4 This is the present invention. Figure 3 An enlarged structural diagram of part A;

[0030] Figure 5 This is a schematic diagram of the switching device of the present invention, and... Figure 4 In comparison, the locking and tripping fasteners have been removed and the moving contact and stationary contact are now closed;

[0031] Figure 6 This is a schematic diagram of the switching device of the present invention, showing the switching device in the open state;

[0032] Figure 7 This is a schematic diagram of the switching device of the present invention, and... Figure 6 In comparison, the locking and tripping fasteners have been removed and the moving and stationary contacts are separated;

[0033] Figure 8 This is a schematic diagram of the switching device of the present invention, showing the switching device in the tripped state;

[0034] Figure 9 This is a schematic diagram of the structure of the switching device of the present invention. The switching device is in the tripped state, showing the cooperation relationship between the trip fastener and the locking fastener.

[0035] Figure 10 This is the present invention. Figure 9 An enlarged structural diagram of part B;

[0036] Figure 11 A schematic diagram of the switching device of the present invention is shown. The switching device is in the tripped state, and... Figure 11 Compared to the previous version, the jump fasteners and locking fasteners have been removed;

[0037] Figure 12 This is a three-dimensional structural diagram of the moving contact of the present invention;

[0038] Figure 13 This is a side projection structural schematic diagram of the moving contact of the present invention;

[0039] Figure 14 This is a three-dimensional assembly structure diagram of the operating mechanism and the moving contact of the present invention;

[0040] Figure 15 This is a side projection structural schematic diagram of the second link of the present invention;

[0041] Figure 16 This is a side projection structural schematic diagram of the jump fastener of the present invention;

[0042] Figure 17 This is a structural schematic diagram of the locking component of the present invention from one side view;

[0043] Figure 18 This is a structural schematic diagram of the locking component of the present invention from another perspective;

[0044] Figure 19 This is a side projection structural diagram of the outer casing of the present invention;

[0045] Figure 20 This is a three-dimensional structural diagram of the outer shell of the present invention. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1-20 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.

[0047] like Figure 1-20 As shown, the present invention discloses a switching device, preferably a circuit breaker.

[0048] like Figure 1-3 As shown in Figures 6, 8-9, the switching device of the present invention includes a housing 1a and an operating mechanism and a stationary contact 8a disposed within the housing 1a. The operating mechanism includes a moving contact 6a that cooperates with the stationary contact 8a. The moving contact 6a and the stationary contact 8a constitute the contact system of the switching device. The operating mechanism drives the moving contact 6a to close or open with the stationary contact 8a, so as to close or open the switching device.

[0049] like Figure 1-3As shown in Figures 6 and 8-9, one embodiment of the operating mechanism is as follows: The operating mechanism includes a handle 2a, a jump fastener 4a, a locking fastener 5a, a first connecting rod 3a, a second connecting rod 7a, and a moving contact 6a. The handle 2a, jump fastener 4a, and locking fastener 5a are rotatably mounted on the housing 1a. The first connecting rod 3a includes a first end and a second end, with the first end rotatably connected to the handle 2a. The jump fastener 4a includes a jump fastener guide rail structure 4-2a, and the second end of the connecting rod... The second connecting rod 7a is hinged to one end and slidably mounted on the jump fastener guide structure 4-2a. The jump fastener 4a and the locking fastener 5a are engaged. The locking fastener 5a is driven by an external force to rotate, thereby releasing its engagement with the jump fastener 4a. The moving contact 6a includes a contact waist-shaped hole 6-10a at one end. The moving contact 6a is rotatably mounted on the first mounting shaft 5x on the housing 1a through the contact waist-shaped hole 6-10a. The other end of the second connecting rod 7a is rotatably connected to the moving contact 6a. Furthermore, when the moving contact 6a is closed with the stationary contact 8a, the contact waist-shaped hole 6-10a moves relative to the first mounting shaft 5x.

[0050] The operating mechanism, applied in a switching device, adopts a cam-five-bar linkage mechanism, which is more compact and smaller in size than the existing four-bar linkage operating mechanism. When the moving contact and the stationary contact are closed, the contact waist-shaped hole moves relative to the first mounting shaft, and the moving contact rotates around the first mounting shaft, causing the moving contact to slide relative to the stationary contact. This can effectively remove the oxide film on the surface of the moving contact and the stationary contact, and improve the conductivity of the contact system.

[0051] like Figure 1-3 As shown in Figures 5-9 and 11, the second connecting rod 7a is rotatably connected to the middle of the moving contact 6a.

[0052] like Figure 1-3 As shown in Figures 6, 8-9, and 16, the guide rail structure 4-2a of the jump fastener is a sliding hole or sliding groove provided on the jump fastener 4a, and the second end of the connecting rod is slidably inserted into the sliding hole or sliding groove. Further, the sliding hole or sliding groove is an oblong hole or oblong groove.

[0053] like Figure 1-3 As shown in 6, 8-9, and 16, the first connecting rod 3a is a U-shaped connecting rod, which includes two connecting rod arms arranged opposite to each other, namely the first end of the connecting rod and the second end of the connecting rod. The second end of the connecting rod is rotatably connected to one end of the second connecting rod 7a and is slidably inserted into the aforementioned sliding hole or sliding groove.

[0054] In other embodiments, the first connecting rod 3a can also be a straight rod, with its two ends respectively rotatably connected to one end of the handle 2a and the second connecting rod 7a via separate connecting shafts. Figure 6As shown, when the operating mechanism is in the open state, there is a first gap (not shown in the figure) between the trip fastener 4a and the locking fastener 5a; the first gap prepares for the re-engaging of the trip fastener 4a and the locking fastener 5a, ensuring that the trip fastener 4a and the locking fastener 5a can reliably re-engage after the engagement is released. Furthermore, the first gap is formed between the trip fastener locking surface 4-0a of the trip fastener 4a and the locking surface 5-0a of the locking fastener 5a.

[0055] Combination Figure 1-7 As shown, when the handle 2a drives the operating mechanism to switch between the closed and open states, the second end of the first link 3a slides along the jump fastener guide rail structure 4-2a. Specifically, as... Figure 1-3 As shown in Figures 5-7, the handle 2a swings clockwise to drive the operating mechanism to close the circuit, and swings counterclockwise to drive the operating mechanism to open the circuit.

[0056] Combination Figure 1-6 As shown, the handle 2a is in the closing direction (e.g.) Figure 1-3 As shown in Figures 5-9 and 11, when the closing direction is preferably clockwise, the operating mechanism swings to close the circuit. The tripping latch 4a rotates to engage with the locking latch 5a. Then, the tripping latch 4a and the locking latch 5a remain engaged and stationary until the handle 2a drives the moving contact 6a to the closed position via the first link 3a and the second link 7a. The handle 2a moves in the opening direction (e.g., clockwise). Figure 1-3 As shown in Figures 5-9 and 11, when the opening direction (preferably counterclockwise) swings to drive the operating mechanism to open the circuit breaker, the trip fastener 4a and the locking fastener 5a remain engaged and stationary until the handle 2a drives the moving contact 6a to the disconnected position via the first link 3a and the second link 7a. Then, the trip fastener 4a rotates relative to the locking fastener 5a, creating a first gap between them. Furthermore, the operation process of the operating mechanism from the open state to the closed state is the reverse of the operation process from the closed state to the open state.

[0057] like Figure 3-4 As shown in Figure 8-11, when the switch device is in the closed state, the locking member 5a is driven to rotate by an external force (preferably the driving force of the short-circuit protection mechanism 12a and / or overload protection mechanism 11a of the switch device) so that it is released from engagement with the tripping member 4a. The second end of the first connecting rod 3a drives the tripping member 4a to rotate, and the tripping member 4a drives the locking member 5a to swing away from the tripping member 4a and lock the locking member 5a.

[0058] like Figure 1-3 As shown in 6, 8-9, the locking element 5a is also rotatably mounted on the outer casing 1a via the first mounting shaft 5x.

[0059] like Figure 1-3 As shown in Figures 6, 8-9, one end of the jump fastener 4a and the locking fastener 5a are respectively rotatably mounted on the outer shell 1a, and the other end of the jump fastener 4a and the locking fastener 5a are engaged.

[0060] like Figure 1-3 As shown in Figures 6, 8-9, the rotation centers of the handle 2a, the jump buckle 4a, and the locking buckle 5a are respectively located at the three vertices of a triangle. Furthermore, the rotation center of the handle 2a is located at the vertex corresponding to the obtuse angle of an obtuse triangle.

[0061] Specifically, such as Figure 1-3 As shown in Figures 6-8-9, the handle 2a is rotatably mounted on the housing 1a via the handle shaft 2x, and the jump fastener 4a is rotatably mounted on the housing 1a via the jump fastener shaft 4x. Further, as... Figures 19-20 As shown, the handle shaft 2x and the outer shell 1a are an integral structure. The outer shell 1a is provided with a jump buckle shaft mounting hole 1-4a and a first mounting shaft mounting hole 1-5a for inserting the jump buckle shaft 4x and the first mounting shaft 5x, respectively.

[0062] like Figure 2 As shown, one embodiment of the handle component 2a is illustrated: the handle component 2a includes a handle component operating part 2-1a and a handle component connecting part 2-2a. The outer shell 1a is provided with an outer shell clearance hole. One end of the handle component operating part 2-1a is connected to the handle component connecting part 2-2a, and the other end passes through the outer shell clearance hole for external force operation. The handle component operating part 2-1a is respectively limited to the two ends of the outer shell clearance hole at both ends of the swing stroke of the handle component 2a. The handle connecting part 2-2a is rotatably mounted on the outer shell 1a via the handle shaft 2x and is rotatably connected to one end of the first connecting rod 3a. Furthermore, the operating mechanism also includes a handle spring (not shown in the figure), which applies a force to the handle component 2a, causing the handle component 2a to have a tendency to rotate in the opening direction.

[0063] like Figure 2 , 5As shown in Figures 7, 11, and 14, the operating mechanism further includes a contact spring 13a. The contact spring 13a applies a force to the moving contact 6a, causing the moving contact 6a to press against the stationary contact 8a when the moving contact 6a is closed with the stationary contact 8a. After the moving contact 6a separates from the stationary contact 8a, the moving contact 6a swings around the first mounting axis 5x in a direction away from the stationary contact 8a. Furthermore, one end of the contact spring 13a engages with a portion of the moving contact 6a located between the contact waist-shaped hole 6-10a and the connection point between the moving contact 6a and the second connecting rod 7a, while the other end engages with the housing 1a. Furthermore, the moving contact 6a is provided with a moving contact bridge connecting hole 6-30a, and the moving contact 6a is rotatably connected to the second connecting rod 7a through the moving contact bridge connecting hole 6-30a; one end of the contact spring 13a is limited to the outer shell 1a, and the other end is limited to the part of the moving contact 6a located between the contact waist-shaped hole 6-10a and the moving contact bridge connecting hole 6-30a.

[0064] Specifically, such as Figure 1-2 As shown, when the moving contact 6a and the stationary contact 8a are closed, the contact spring 13a applies a force to the moving contact 6a, causing it to tend to rotate (preferably clockwise) around the connection between the moving contact 6a and the second connecting rod 7a, thus pressing the moving contact 6a against the stationary contact 8a; Figure 6-7 As shown, after the moving contact 6a and the stationary contact 8a are separated, the moving contact 6a rotates around the first mounting shaft 5x, and the contact spring 13a applies a force to the moving contact 6a so that it tends to rotate around the first mounting shaft 5x (preferably counterclockwise).

[0065] like Figure 2 , 5 As shown in Figures 7, 11, and 14, the contact spring 13a is a torsion spring, sleeved on the first mounting shaft 5x. One end is in a limiting fit with the outer casing 1a, and the other end is in a limiting fit with the portion of the moving contact 6a located between the contact waist-shaped hole 6-10a and the moving contact bridge connecting hole 6-30a. Further, as... Figures 19-20 As shown, the outer casing 1a is provided with a contact spring limiting post 1-13a that cooperates with one end of the contact spring 13a.

[0066] In other embodiments, the contact spring 13a may also be a tension spring or a compression spring.

[0067] like Figure 1-3 As shown in Figures 5, 6-9, 11, and 19-20, the outer casing 1a includes moving contact limiting posts 1-6a, which limit the movement of the moving contact 6a when it is in the broken position. The moving contact limiting posts 1-6a and the stationary contact 8a are located on both sides of the moving contact 6a. Specifically, when the moving contact 6a is in the broken position, the contact spring 13a applies a force to the moving contact 6a, causing the moving contact 6a to abut against the moving contact limiting posts 1-6a.

[0068] like Figure 12-13 The image shows one embodiment of the moving contact 6a: the moving contact 6a includes a moving contact bridge and a moving contact 6-4a. The moving contact bridge includes a moving contact bridge mounting plate 6-1a, a moving contact bridge transition plate 6-2a, and a moving contact bridge connecting plate 6-3a connected in sequence. The moving contact bridge mounting plate 6-1a and the moving contact bridge connecting plate 6-3a are arranged in parallel and are respectively bent and connected to both ends of the moving contact bridge transition plate 6-2a. The moving contact bridge mounting plate 6-1a is provided with a contact waist-shaped hole 6-10a. The moving contact bridge connecting plate 6-3a is provided with a moving contact bridge connecting hole 6-30a at one end near the moving contact bridge transition plate 6-2a, which is rotatably connected to the second connecting rod 7a. The moving contact bridge connecting plate 6-3a is provided with a moving contact 6-4a at the other end. Further, the moving contact bridge mounting plate 6-1a is provided with a notch on one side for avoiding the locking fastener 5a and the locking fastener linkage shaft 5-2a.

[0069] like Figure 14-15 As shown, this is one embodiment of the second link 7a: The second link 7a includes two symmetrically arranged link arms 7-0a. One end of each link arm 7-0a is located on both sides of the jump fastener 4a and rotatably connected to one end of the first link 3a. The other ends of each link arm 7-0a are located on both sides of the moving contact 6a and rotatably connected to the moving contact 6a. Further, the second link 7a also includes a link connecting portion 7-1a, the two ends of which are bent and connected to the two link arms 7-0a respectively. Having one end of each link arm 7-0a of the second link 7a located on both sides of the jump fastener 4a and the other end located on both sides of the moving contact 6a improves the stability and reliability of the connection structure.

[0070] like Figure 3 As shown, when the moving contact 6a closes with the stationary contact 8a of the switching device, the torque applied by the second end of the connecting rod to the jump fastener 4a is opposite in direction and equal in magnitude to the torque applied by the locking member 5a to the jump fastener 4a. The lever arm of the force applied by the locking member 5a to the jump fastener 4a is greater than the lever arm of the force applied by the second end of the connecting rod to the jump fastener 4a. This helps to reduce the force applied by the locking member 5a to the jump fastener 4a, thereby reducing the resistance when the locking member 5a disengages from the jump fastener 4a due to rotation. In other words, it helps to significantly reduce the release force between the locking member 5a and the jump fastener 4a. Furthermore, as... Figure 3 As shown, the torque applied by the second end of the connecting rod to the jumping fastener 4a causes the jumping fastener 4a to tend to rotate in the first direction, and the torque applied by the locking fastener 5a to the jumping fastener 4a causes the jumping fastener 4a to tend to rotate in the second direction. The first direction and the second direction are opposite to each other. Further, as... Figure 3 The directions shown are clockwise and counterclockwise.

[0071] Preferred, such as Figure 3 As shown, the lever arm by which the locking member 5a applies force to the jumping member 4a is 6 times the lever arm by which the second end of the connecting rod applies force to the jumping member 4a.

[0072] Specifically, such as Figure 3 As shown, when the moving contact 6a and the stationary contact 8a are closed, the hinged axial jump fastener 4a applies a force F1 with a lever arm of L1, and the locking fastener 5a applies a force F2 to the jump fastener 4a with a lever arm of L2. F1×L1=-F2×L2, L2=6×L1.

[0073] like Figure 3-4 As shown in Figures 9-10 and 16-17, the jump fastener 4a includes a jump fastener mating part 4-3a, which includes a jump fastener locking surface 4-0a and a jump fastener driving surface 4-1a; the locking fastener 5a includes a locking fastener mating part 5-6a, which includes a locking fastener locking surface 5-0a and a locking fastener driven surface 5-1a; the jump fastener locking surface 4-0a and the locking fastener locking surface 5-0a overlap and limit each other to lock the jump fastener 4a and the locking fastener 5a; the jump fastener driving surface 4-1a and the locking fastener driven surface 5-1a drive each other to drive the locking fastener mating part 5-6a to swing away from the jump fastener 4a and lock the locking fastener 5a. Specifically, in conjunction with... Figure 1-3 As shown in Figures 8-10, when the jump fastener 4a and the locking fastener 5a are disengaged, the jump fastener 4a rotates clockwise, and at the same time, through the cooperation of the jump fastener driving surface 4-1a and the locking fastener receiving surface 5-1a, the locking fastener 5a is driven to rotate counterclockwise.

[0074] like Figure 16 As shown, the driving surface 4-1a of the jump fastener is an arc-shaped surface, one end of which is bent and connected to one end of the locking surface 4-0a of the jump fastener; on the side projection of the jump fastener 4a, the line connecting the rotation center of the jump fastener 4a and the arc-shaped surface is Line1, which passes through the center of the arc-shaped surface; the line connecting the rotation center of the jump fastener 4a and the connection point between the locking surface 4-0a and the driving surface 4-1a is Line2, and the length of Line1 is greater than the length of Line2; when the fastener is released, the rotation angle of the locking component 5a depends on the length difference between Line1 and Line2. Further, as... Figure 16 As shown, the center of the arc surface of the jump fastener driving surface 4-1a is parallel to and spaced apart from the rotation center of the jump fastener 4a.

[0075] like Figure 3-4 As shown in Figures 9-10, the moving surface 5-1a of the locking element is an inclined surface, tilting from one end near the locking surface 5-0a towards the other end of the moving surface 5-1a, towards the side where the jump fastener 4a is located. Specifically, as shown in Figures 9-10... Figure 3-4As shown in 9-10, one end of the moving surface 5-1a of the locking member is bent and connected to the locking surface 5-0a of the locking member. The end of the moving surface 5-1a of the locking member connected to the locking surface 5-0a of the locking member gradually tilts towards the other end of the moving surface 5-1a of the locking member towards the side where the jump fastener 4a is located.

[0076] The working principle of the cam-five-bar linkage of the operating mechanism will be explained in detail below:

[0077] like Figure 1-11 As shown, in the operating mechanism, the handle 2a, the first link 3a, the second link 7a, the moving contact 6a, and the housing 1a constitute a five-bar linkage with two degrees of freedom. However, because the second end of the first link 3a is slidably mounted on the jump fastener guide rail structure 4-2a of the jump fastener 4a, one degree of freedom of the five-bar linkage is restricted, thus resulting in a cam-five-bar linkage with one degree of freedom. Figure 6-7 As shown, the operating mechanism is in the open state. The handle part 2-1a of the handle 2a is limited to the housing 1a. The moving contact 6a and the stationary contact 8a are in the disconnected state. A certain gap is provided between the locking surface 4-0a of the trip fastener 4a and the locking surface 5-0a of the locking structure of the locking fastener 5a to ensure that the trip fastener 4a and the locking fastener 5a can be reliably engaged when the switch is closed, and to prepare for the re-engagement of the trip fastener 4a and the locking fastener 5a. The left end of the contact waist-shaped hole 6-10a of the moving contact 6a is engaged with the first mounting shaft 5x, which serves as the rotation center of the movable contact 6. Figure 1-5 As shown, when the operating mechanism of the present invention is in the closed state, the handle part 2-1a of the handle 2a is in a limiting fit with the outer shell 1a, the moving contact 6a and the stationary contact 8a are in the closed state, the locking surface 4-0a of the jump fastener and the locking surface 5-0a of the locking fastener overlap, the contact waist-shaped hole 6-10a of the moving contact 6a moves relative to the first mounting shaft 5x, and the hinge point between the second connecting rod 7a and the moving contact 6a serves as the rotation center of the moving contact 6a. When the switching device of the present invention is in the closed state (e.g....), Figure 1-5 As shown), the locking element 5a is driven by an external force to rotate away from the location of the tripping element 4a, thus disengaging the locking element 5a from the tripping element 4a. The cam-five-bar linkage mechanism transforms into a six-bar linkage mechanism with two degrees of freedom. The contact spring 13a drives the moving contact 6a to the breaking position and engages with the moving contact limit post 1-6a. The handle spring drives the handle 2a to rotate in the opening direction (i.e., counterclockwise). Simultaneously, the second end of the first link 3a drives the tripping element 4a to rotate. The tripping element 4a, through the engagement of the tripping element driving surface 4-1a and the locking element receiving surface 5-1a, drives the locking element 5a to swing away from the location of the tripping element 4a. The tripping element driving surface 4-1a and the locking element receiving surface 5-1a are engaged, ultimately locking the locking element 5a and causing the operating mechanism to enter the opening position. Figure 8-11The tripped state is shown.

[0078] like Figure 1-3 As shown in Figures 6-7 and 8-9, the switching device further includes a short-circuit protection mechanism 12a and an overload protection mechanism 11a; the locking member 5a also includes a locking member main board 5-9a, a locking member mating part 5-6a is disposed on one side of the locking member main board 5-9a, one end of the locking member main board 5-9a is rotatably mounted on the housing 1a, and the other end is driven to cooperate with the short-circuit protection mechanism 12a and the overload protection mechanism 11a respectively. Further, as... Figure 17-18 As shown, the locking component 5a also includes a locking component striking part 5-8a and a locking component pulling hole 5-90a. The locking component striking part 5-8a is driven to cooperate with the short circuit protection mechanism 12a. The locking component pulling hole 5-90a is rotatably connected to one end of the pulling rod 10a, and the other end of the pulling rod 10a is driven to cooperate with the bimetallic strip of the overload protection mechanism 11a.

[0079] like Figure 1-3 As shown in 6-7 and 8-9, the short-circuit protection mechanism 12a is preferably an electromagnetic tripping mechanism, whose top rod is driven and cooperates with the locking striking part 5-8a; the overload protection mechanism 11a is preferably a bimetallic overload protection mechanism.

[0080] like Figure 1-3 As shown in 6-7, 8-9, 19-20, the outer shell 1a includes a pull rod guide groove 1-10a, and one end of the pull rod 10a that cooperates with the bimetallic strip of the overload protection mechanism 11a is slidably inserted into the pull rod guide groove 1-10a.

[0081] In other embodiments, the switching device may also be provided with only either the short-circuit protection mechanism 12a or the overload protection mechanism 11a.

[0082] like Figure 17-18 As shown, the locking component 5a also includes a locking component linkage shaft 5-2a and a locking component linkage hole 5-4a, which are respectively disposed on both sides of the locking component main board 5-9a; the locking component linkage shaft 5-2a or the locking component linkage hole 5-4a cooperates with the locking component linkage hole 5-4a or the locking component linkage shaft 5-2a of the locking component 5a of the adjacent operating mechanism, thereby realizing the linkage of multiple switching devices so that the operating mechanisms of each switching device are simultaneously disengaged.

[0083] like Figure 1-3 As shown in Figures 6 and 8-9, the operating mechanism further includes a locking element return spring 9a. The locking element return spring 9a is a torsion spring, sleeved on the first mounting shaft 5x, with one end cooperating with the outer casing 1a and the other end cooperating with the locking element 5a. Furthermore, the outer casing 1a is provided with a locking element return spring limiting post 1-9a, which cooperates with one end of the locking element return spring 9a.

[0084] like Figure 4 , 10 As shown in Figure 16, one embodiment of the jump fastener 4a is described: the jump fastener 4a includes a jump fastener mounting part 4-5a, a jump fastener connecting part 4-4a, and a jump fastener mating part 4-3a. The jump fastener mounting part 4-5a and the jump fastener mating part 4-3a are respectively connected to both ends of the jump fastener connecting part 4-4a. The jump fastener mounting part 4-5a is provided with a jump fastener shaft hole 4-50a that mates with the first mounting shaft 5x. The jump fastener connecting part 4-4a is provided with a jump fastener guide rail structure 4-2a at one end near the jump fastener mounting part 4-5a. The jump fastener mating part 4-5a... -3a is provided with a jump fastener locking surface 4-0a and a jump fastener driving surface 4-1a; the jump fastener driving surface 4-1a is an arc-shaped surface, one end of which is bent and connected to one end of the jump fastener locking surface 4-0a; on the side projection of the jump fastener 4a, the line connecting the rotation center of the jump fastener 4a and the arc-shaped surface is Line1, which passes through the center of the arc-shaped surface, and the line connecting the rotation center of the jump fastener 4a and the connection point of the jump fastener locking surface 4-0a and the jump fastener driving surface 4-1a is Line2, and the length of Line1 is greater than the length of Line2.

[0085] like Figure 17-19 The image shows one embodiment of the locking element 5a: the locking element 5a includes a main locking element 5-9a, a mating locking element 5-6a, a mounting locking element 5-5a, a striking locking element 5-8a, a spring-limiting locking element 5-3a, a linkage shaft 5-2a, and a linkage hole 5-4a. The main locking element 5-9a is connected at both ends to the mounting locking element 5-5a and the striking locking element 5-8a, respectively. The mounting locking element 5-5a has a locking element shaft hole 5-50a that mates with the first mounting shaft 5x. The linkage shaft... 5-2a, the fastener mating part 5-6a and the fastener striking part 5-8a are located on one side of the fastener main board 5-9a, the fastener linkage hole 5-4a and the fastener spring limiting part 5-3a are located on the other side of the fastener main board 5-9a, the fastener spring limiting part 5-3a is located between the fastener linkage hole 5-4a and the fastener mounting part 5-5a, the fastener main board 5-9a is also provided with a fastener pulling hole 5-90a, the fastener pulling hole 5-90a and the fastener striking part 5-8a are located at the same end of the fastener main board 5-9a.

[0086] Preferred, such as Figure 17-19 As shown, one end of the locking component mating part 5-6a is connected to the locking component mounting part 5-5a, and the other end is provided with a locking component driving surface 5-1a. A slot is provided in the middle of the locking component mating part 5-6a. The side of the slot that is connected to the locking component driving surface 5-1a is the locking component locking surface 5-0a. The locking component linkage shaft 5-2a is located on one side of the slot and is connected to the locking component mating part 5-6a.

[0087] Preferred, such as Figure 17-19 As shown, the striking part 5-8a of the locking component is an arc-shaped plate, and the pulling hole 5-90a of the locking component is opposite to the groove of the arc-shaped plate.

[0088] like Figure 1-3 As shown in Figures 6, 8-9, one layout of the switching device is as follows: the rotation centers of the handle 2a, the jump fastener 4a, and the locking fastener 5a are respectively located at the three vertices of a triangle; one end of the locking fastener 5a and the moving contact 6a are rotatably mounted on the first mounting shaft 5x, and the locking fastener 5a and the moving contact 6a are stacked along the thickness direction of the switching device, with the included angle between the axes of the locking fastener 5a and the moving contact 6a always being an acute angle; the other end of the locking fastener 5a is driven and cooperated with the short-circuit protection mechanism 12a and the overload protection mechanism 11a respectively, the short-circuit protection mechanism 12a, the stationary contact 8a, the handle 2a, the first connecting rod 3a, and the jump fastener 4a are all located on one side of the moving contact 6a and the locking fastener 5a, and the overload protection mechanism 11a is located on the other side of the moving contact 6a and the locking fastener 5a; the second connecting rod 7a intersects the locking fastener 5a in space. Specifically, as shown in Figure 6... Figure 4-6 In the directions shown in 9, 11-12, the handle 2a, the first connecting rod 3a, the jump fastener 4a, and the short circuit protection mechanism 12a are all located to the left of the moving contact 6a and the locking fastener 5a, while the overload protection mechanism 11a is located to the right of the moving contact 6a and the locking fastener 5a.

[0089] 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 handle (2a), a jump-lock (4a), a locking member (5a), a first link (3a), a second link (7a), and a moving contact (6a) disposed within a housing (1a) of a switch device. The handle (2a), jump-lock (4a), and locking member (5a) are rotatably disposed on the housing (1a). The first link (3a) includes a first end and a second end, the first end of which is rotatably connected to the handle (2a). The jump-lock (4a) includes a jump-lock guide structure (4-2a). The second end of the link is hinged to the left end of the second link (7a) and slidably disposed on the jump-lock guide structure (4-2a). The left end of the jump-lock (4a) is rotatably disposed on the housing (1a), and the right end engages with the locking member (5a). The locking member (5a) is driven by an external force to rotate, thereby releasing its engagement with the jump-lock (4a). characterized in that The moving contact (6a) includes a contact waist-shaped hole (6-10a) at its upper end. The moving contact (6a) is rotatably mounted on a first mounting shaft (5x) on the housing (1a) through the contact waist-shaped hole (6-10a). The right end of the second connecting rod (7a) is rotatably connected to the middle of the moving contact (6a). The lower end of the moving contact (6a) cooperates with the stationary contact (8a). The upper end of the locking member (5a) is rotatably mounted on the housing (1a) through the first mounting shaft (5x). The lower end of the locking member (5a) is used to engage with the stationary contact (8a). The short-circuit protection mechanism (12a) and the overload protection mechanism (11a) located on the left and right sides of the locking element (5a) cooperate; the locking element (5a) and the moving contact (6a) are stacked along the axial direction of the first mounting shaft (5x); the rotation centers of the handle (2a), the jump fastener (4a) and the locking element (5a) are respectively located at the three vertices of a triangle; the handle (2a), the first connecting rod (3a) and the jump fastener (4a) are all located on the left side of the moving contact (6a) and the locking element (5a); The jump fastener (4a) includes a jump fastener mating part (4-3a), and the jump fastener mating part (4-3a) includes a jump fastener locking surface (4-0a); the locking fastener (5a) includes a locking fastener mating part (5-6a), and the locking fastener mating part (5-6a) includes a locking fastener locking surface (5-0a); the jump fastener locking surface (4-0a) and the locking fastener locking surface (5-0a) overlap and limit the engagement so that the jump fastener (4a) and the locking fastener (5a) are engaged. The locking component (5a) also includes a locking component main board (5-9a). The locking component mating part (5-6a) is arranged on one side of the locking component main board (5-9a) in the axial direction of the first mounting shaft (5x). The upper end of the locking component main board (5-9a) is rotatably mounted on the outer shell (1a) through the first mounting shaft (5x), and the lower end is used to drive and cooperate with the short circuit protection mechanism (12a) and the overload protection mechanism (11a).

2. The operating mechanism of claim 1, wherein: The operating mechanism also includes a contact spring (13a), which applies a force to the moving contact (6a). When the moving contact (6a) is closed with the stationary contact (8a) of the switching device, the moving contact (6a) presses the stationary contact (8a) against the stationary contact (8a). After the moving contact (6a) is separated from the stationary contact (8a), the moving contact (6a) swings around the first mounting shaft (5x) in a direction away from the stationary contact (8a).

3. The operating mechanism of claim 2, wherein: One end of the contact spring (13a) engages with the portion of the moving contact (6a) located between the contact waist-shaped hole (6-10a) and the connection between the moving contact (6a) and the second connecting rod (7a), and the other end engages with the outer casing (1a).

4. The operating mechanism of claim 1, wherein: The operating mechanism also includes a handle spring, which applies a force to the handle (2a) to make the handle (2a) tend to rotate in the opening direction.

5. The operating mechanism of claim 1, wherein: The jump fastener guide rail structure (4-2a) is a sliding hole or sliding groove provided on the jump fastener (4a); the first connecting rod (3a) is a U-shaped connecting rod, which includes two connecting rod arms arranged opposite to each other, namely the first end of the connecting rod and the second end of the connecting rod, and the second end of the connecting rod is slidably inserted into the sliding hole or sliding groove.

6. The operating mechanism of claim 1, wherein: When the moving contact (6a) closes with the stationary contact (8a) of the switching device, the torque applied by the second end of the connecting rod to the jump fastener (4a) is opposite in direction and equal in magnitude to the torque applied by the locking fastener (5a) to the jump fastener (4a). The lever arm of the force applied by the locking fastener (5a) to the jump fastener (4a) is greater than the lever arm of the force applied by the second end of the connecting rod to the jump fastener (4a).

7. The operating mechanism of claim 6, wherein: When the moving contact (6a) and the stationary contact (8a) are closed, the lever arm of the locking member (5a) applying force to the jumping member (4a) is 6 times the lever arm of the second end of the connecting rod applying force to the jumping member (4a).

8. The operating mechanism of claim 1, wherein: When the operating mechanism is in the open state, there is a first gap between the trip fastener (4a) and the locking fastener (5a); when the handle (2a) drives the operating mechanism to switch between the closed state and the open state, the second end of the connecting rod slides along the trip fastener guide rail structure (4-2a).

9. The operating mechanism of claim 8, wherein: When the operating mechanism is in the closed state, the locking element (5a) is driven by an external force to rotate, thereby disengaging it from the jumping element (4a). The second end of the connecting rod drives the jumping element (4a) to rotate, and at the same time, the jumping element (4a) drives the locking element (5a) to swing away from the jumping element (4a).

10. The operating mechanism of claim 9, wherein: The jump fastener mating part (4-3a) further includes a jump fastener driving surface (4-1a); the locking fastener mating part (5-6a) further includes a locking fastener receiving surface (5-1a); the jump fastener driving surface (4-1a) and the locking fastener receiving surface (5-1a) drive each other to drive the locking fastener mating part (5-6a) to swing away from the jump fastener (4a).

11. The operating mechanism of claim 10, wherein: The driving surface (4-1a) of the jump fastener is an arc-shaped surface, one end of which is bent and connected to one end of the locking surface (4-0a) of the jump fastener. On the side projection of the jump fastener (4a), the line connecting the rotation center of the jump fastener (4a) and the arc-shaped surface is Line1, which passes through the center of the arc-shaped surface. The line connecting the rotation center of the jump fastener (4a) and the connection point between the locking surface (4-0a) and the driving surface (4-1a) of the jump fastener is Line2, and the length of Line1 is greater than the length of Line2.

12. The operating mechanism of claim 11, wherein: The locking component (5a) further includes a locking component linkage shaft (5-2a) and a locking component linkage hole (5-4a), which are respectively disposed on both sides of the main locking component (5-9a); the locking component linkage shaft (5-2a) or the locking component linkage hole (5-4a) cooperates with the locking component linkage hole (5-4a) or the locking component linkage shaft (5-2a) of the locking component (5a) of the adjacent operating mechanism.

13. The operating mechanism of claim 1, wherein: The second link (7a) includes two symmetrically arranged link arms (7-0a). One end of each link arm (7-0a) is located on both sides of the jump fastener (4a) and is rotatably connected to the second end of the link. The other end of each link arm (7-0a) is located on both sides of the moving contact (6a) and is rotatably connected to the moving contact (6a).

14. A switching device, characterized by It includes the operating mechanism as described in any one of claims 1-13.

15. The switching device of claim 14, wherein: The switching device also includes a stationary contact (8a) that cooperates with the moving contact (6a), as well as a short-circuit protection mechanism (12a) and an overload protection mechanism (11a); the short-circuit protection mechanism (12a), the stationary contact (8a), the handle (2a), the first connecting rod (3a) and the trip fastener (4a) are all located on one side of the moving contact (6a) and the locking fastener (5a), and the overload protection mechanism (11a) is located on the other side of the moving contact (6a) and the locking fastener (5a).

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