Rotary isolating switch with novel wiring structure

Abstract

The invention belongs to the technical field of switches, and particularly relates to a rotary disconnecting switch with a novel wiring structure, which comprises a conductive system, the conductive system comprises at least two groups of switch units sequentially arranged along a first direction, and each group of switch unit comprises a moving contact assembly and a static contact assembly, the rotating center shaft of the moving contact assembly is arranged in the first direction, the static contact assembly is provided with a wiring board, and the wiring boards of every two adjacent switch units in the first direction are located on the same wiring layer. According to the invention, the wiring structure of the multi-pole rotary disconnecting switch is improved, so that every two layers of switch units share one wiring layer, and wiring and maintenance of a user are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of switches, and in particular relates to a rotary isolating switch with a novel wiring structure. Background Art

[0002] With the acceleration of industrialization and urbanization, the demand for power load has surged, and the grid structure has become increasingly complex. Traditional single-pole or low-pole rotary disconnectors are difficult to meet the needs of multi-circuit and large-capacity power distribution. Existing multi-pole switches are mainly realized by superimposing conductive systems. The number of layers of the switch wiring structure is consistent with the number of superimposed layers of the conductive system, which makes wiring inconvenient and inconvenient for subsequent maintenance. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a rotary isolating switch with a novel wiring structure.

[0004] The technical solution adopted by the present invention is as follows: A rotary isolating switch with a new wiring structure includes a conductive system, wherein the conductive system includes at least two groups of switch units arranged in sequence along a first direction, each group of switch units includes a moving contact assembly and a stationary contact assembly, the rotation center axis of the moving contact assembly is arranged along the first direction, and the stationary contact assembly has a wiring board, and the wiring boards of every two adjacent groups of switch units along the first direction are located in the same wiring layer.

[0005] The plane where the wiring board is located is located between the rotation planes of the two groups of moving contact assemblies.

[0006] The static contact assembly includes a static contact and a conductive plate. The static contact cooperates with the moving contact assembly for opening and closing the switch. One end of the conductive plate is connected to the static contact and the other end is connected to the terminal block. The conductive plate has two bends. The bending directions of the conductive plates of adjacent layers along the first direction are opposite, so that the angle of one end located outside the switch unit cavity relative to the rotation center axis of the moving contact assembly is staggered.

[0007] The conductive plate is arranged along the first direction, the plane where the wiring board is located is perpendicular to the first direction, and the conductive plate and the wiring board are bent and connected, the wiring boards of odd layers are connected to the lower end of the conductive plate, and the wiring boards of even layers are connected to the upper end of the conductive plate.

[0008] The switch units are divided into a first switch unit and a second switch unit. The moving contact assemblies of the first switch unit and the second switch unit respectively rotate with the axis and the axis as the center axis to perform opening and closing actions. The first switch unit and the second switch unit adjacent to each other along the second direction constitute a switch unit group located on the same layer, and the planes where the terminal blocks of the switch units on the same layer are located are located on the same plane.

[0009] The conductive system includes a switch housing assembly consisting of switch housing units stacked and connected along a first direction, two switch unit cavities separated from each other and located on the same layer are formed between adjacent switch housing units, and a group of first switch units and a group of second switch units are respectively installed in the two switch unit cavities.

[0010] It also includes a transmission mechanism, which includes an input gear and a first output gear with a central axis and a second output gear with a central axis respectively meshed with each other on both sides of the input gear, the first output gear and the second output gear are respectively plugged and driven with the moving contact assemblies of the first switch unit and the second switch unit located on the first layer to apply a rotational force, and two groups of moving contact assemblies adjacent to each other along the first direction are plugged into each other to transmit the rotational force in sequence.

[0011] It includes an operating mechanism, wherein the operating mechanism, the transmission mechanism, and the conductive system are arranged in sequence along a first direction. The operating mechanism includes an input shaft and an output shaft, wherein the input shaft, the output shaft, and the input gear are arranged concentrically, the input shaft is used to input a rotational driving force, and the output shaft is plug-in-drive-coordinated with the input gear to output a rotational driving force.

[0012] The operating mechanism includes a first upper shell, a first lower shell, and an input turntable, an energy storage turntable, and an output turntable that are limited between the first upper shell and the first lower shell and are connected in sequence. The input turntable is circumferentially linked and connected with an input shaft, and energy storage compression springs are connected to both ends of the energy storage turntable. When the input turntable is opened and closed, it can be rotated at a certain angle relative to the energy storage turntable to form a linkage, and the energy storage compression spring stores energy to a starting point during the linkage between the input turntable and the energy storage turntable.

[0013] An energy storage torsion spring is provided between the energy storage turntable and the output turntable, and an elastic positioning member is provided between the output turntable and the first lower shell body. When the operating mechanism is in the closed state and the energy storage turntable rotates from the closed state to the open state in the front part, the elastic positioning member locks the output turntable so that it cannot rotate and the energy storage turntable can rotate relative to the output turntable to store energy of the energy storage torsion spring. In the rear part of the process of the energy storage turntable rotating from the closed state to the open state, the locking effect of the elastic positioning member on the output turntable is released and the energy storage turntable and the output turntable are linked until the energy storage turntable rotates to the open position, and the output turntable rotates to the open position under the energy release action of the energy storage torsion spring.

[0014] The beneficial effects of the present invention are as follows: The present invention improves the wiring structure of a multi-pole rotary isolating switch so that every two layers of switch units share a wiring layer, which is convenient for users to connect and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0016] Figure 1 A schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a structural schematic diagram of a partially hidden housing in an embodiment of the present invention; Figure 3 A front view of an operating mechanism according to an embodiment of the present invention; Figure 4 An exploded view of an operating mechanism according to an embodiment of the present invention; Figure 5 A schematic diagram of the structure of an input turntable according to an embodiment of the present invention; Figure 6 This is a schematic structural diagram of an energy storage turntable at one angle according to an embodiment of the present invention; Figure 7 This is a structural schematic diagram of an energy storage turntable from another angle according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the coordination structure of an input turntable and an energy storage turntable according to an embodiment of the present invention; Fig. 9 A schematic diagram of the structure of an output turntable according to an embodiment of the present invention; Fig.10 This is a schematic structural diagram of an elastic positioning member according to an embodiment of the present invention; Fig.11 This is a schematic diagram of the structure of the transmission mechanism and the conductive system in one embodiment of the present invention; Fig.12 It is a schematic structural diagram of the second layer of the conductive system of an embodiment of the present invention; Fig.13 This is a schematic structural diagram of the third layer of the conductive system of an embodiment of the present invention; Fig.14 A schematic diagram of the structure of a conductive member of a single layer of a conductive system according to an embodiment of the present invention; Fig.15 This is a schematic structural diagram of a conductive member having a double number of layers in a conductive system according to an embodiment of the present invention; Fig.16 This is a schematic diagram of the structure of the coordination of two adjacent layers of switch units according to an embodiment of the present invention; In the figure, 100-handle; 200-operating mechanism; 210-first upper shell; 220-first lower shell; 230-input turntable; 231-first sector-shaped rotating block; 232-first matching groove; 240-energy storage turntable; 241-first turntable body; 242-matching ring; 243-center groove; 244-first arc-shaped rotating block; 245-connecting rod; 246-compression spring connecting part; 247-first limit block; 248-unlocking block; 250-output rotary disc; 251-output rotating shaft; 252-second rotary disc body; 253-one-way locking block; 2531-first locking surface; 2532-first guide surface; 254-arc-shaped through groove; 255-second limit block; 260-input rotating shaft; 270-energy storage torsion spring; 280-energy storage compression spring; 290-elastic positioning member; 291-elastic locking block; 292-second locking surface; 293-second guide surface; 300-transmission mechanism; 310-input gear; 320-first output gear; 330-second output gear; 340-second upper housing; 400-conductive system; 410-switch housing unit; 420-moving contact assembly; 430-stationary contact assembly; 431-stationary contact; 432-connecting piece; 4321-conductive plate; 4322-connecting plate; 440-arc extinguishing chamber. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0019] The directions and positions mentioned in the present invention, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only directions or positions with reference to the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but are not intended to limit the scope of protection of the present invention.

[0020] A rotary disconnect switch, such as Figure 1-2 As shown, it includes a handle 100, an operating mechanism 200, a transmission mechanism 300, and a conductive system 400 which are sequentially connected in transmission along a first direction A.

[0021] The handle 100 is used to input the driving force for the switch opening and closing operations. It can be manually operated or connected to an electric drive mechanism to achieve electric operation.

[0022] like Figure 3, Figure 4 As shown, the operating mechanism 200 includes a first upper shell 210, a first lower shell 220, and an input turntable 230, an energy storage turntable 240, and an output turntable 250 that are limited between the first upper shell 210 and the first lower shell 220 and connected in sequence, the input turntable 230 is connected with an input shaft 260 in a circumferential linkage, an energy storage torsion spring 270 is provided between the energy storage turntable 240 and the output turntable 250, energy storage compression springs 280 are connected at both ends of the energy storage turntable 240, the output turntable 250 is connected with an output shaft 251 in a circumferential linkage, and an elastic positioning member 290 is provided between the output turntable 250 and the first lower shell 220, wherein the input shaft 260 passes through the first upper shell 210 to form a circumferential linkage connection with the handle 100 to input a rotational driving force, and the output shaft 251 passes through the first lower shell 220 to be connected with the transmission mechanism 300 to output a rotational driving force.

[0023] The structure of the input turntable 230 is as follows: Figure 5 As shown, a first sector-shaped rotating block 231 and a first matching groove 232 with an angle of α+2β are provided; the structure of the energy storage rotating disk 240 is as shown Figure 6 , Figure 7 As shown, a first turntable body 241 and a matching ring 242 are provided, a central groove 243 is provided on one side of the first turntable body 241, and a first arc-shaped rotating block 244 with an angle α located outside the central groove 243, the first turntable body 241 and the matching ring 242 are connected by a connecting rod 245, the outer periphery of the first turntable body 241 protrudes to form a compression spring connecting portion 246, the outer periphery of the matching ring 242 protrudes to form a first limit block 247, the first limit block 247 is limitedly matched with the inner wall of the first upper shell 210 to form a limit of the opening and closing rotation position of the energy storage turntable 240; the lower end of the connecting rod 245 protrudes to form an unlocking block 248; wherein, the matching ring 242 is adapted to the outer periphery of the first sector-shaped rotating block 231 and is sleeved outside the first sector-shaped rotating block 231, as shown in FIG. Figure 8 As shown, the first arc-shaped rotating block 244 can perform a relative rotation of 2β angle in the first matching groove 232, the free end of the energy storage compression spring 280 is fixedly connected to the compression spring connecting portion 247 and the fixed end is fixedly connected to the first upper shell 210 and the first lower shell 220; the structure of the output rotary disc 250 is as shown Fig. 9As shown, it includes a second turntable body 252, a convexity at the center of one side of the second turntable body 252 forms an output shaft 251, a convexity near the outer periphery of one side of the second turntable body 252 is formed with a one-way locking block 253, a first locking surface 2531 is formed on one side of the one-way locking block 253 and a first guide surface 2532 is formed on the other side, and an arc-shaped through groove 254 is opened on the second turntable body 252, and the unlocking block 248 of the energy storage turntable 240 cooperates with the arc-shaped through groove 254, so that When the energy storage turntable 240 is rotating for closing, it rotates synchronously with the output turntable 250. When the energy storage turntable 240 is rotating for opening, the unlocking block 248 can move to the other end in the arc-shaped through groove 254 so that the energy storage turntable 240 can rotate a certain angle relative to the output turntable 250 to form a one-way linkage match; the outer periphery of the second turntable body 252 is formed with a second limit block 255, and the second limit block 255 cooperates with the inner wall of the first lower shell 220 to limit the rotation angle of the opening and closing; the structure of the elastic positioning member 290 is as shown in FIG. Fig.10 As shown, there is a raised elastic locking block 291, on which a second locking surface 292 and a second guide surface 293 are formed. The unlocking block 248 of the energy storage rotary disk 240 passes through the arc-shaped through groove 255 so that the unlocking block 248 cooperates with the second guide surface 293 of the elastic locking block 291. When in the closing position, the second locking surface 292 cooperates with the first locking surface 2541. When the energy storage rotary disk 240 rotates relative to the first upper shell 210 and the first lower shell 220 for the opening, the second locking surface 292 cooperates with the first locking surface 2541 to lock the output rotary disk 250 so that the output rotary disk 250 cannot rotate. When the closing rotation is performed, the first guide surface 2532 cooperates with the second guide surface 293 so that the output rotary disk 250 can rotate relative to the elastic positioning member 290.

[0024] When the switch is closed, the input rotary disc 230 rotates by β, and then drives the energy storage rotary disc 240 and the output rotary disc 250 to rotate the front part of the distance. The energy storage compression spring 280 stores energy, and after reaching the starting point, it releases energy to complete the second half of the opening and closing rotation, thereby realizing rapid closing. When performing the opening operation, the input turntable 230 rotates β, and then drives the energy storage turntable 240 to rotate the front part of the distance, the energy storage compression spring 280 stores energy, and at the same time, the output turntable 250 is locked by the elastic positioning member 290 and cannot rotate, so that the energy storage torsion spring 270 stores energy. After reaching the take-off point, the energy storage compression spring 280 releases energy, and drives the energy storage turntable 240 to complete the second half of the rotation. At the same time, when the connecting rod 245 moves to the other end of the arc-shaped through groove 255, the unlocking block 248 pushes the elastic locking block 291 to the second locking surface 292 to release the match with the first locking surface 2541. The output turntable 250 completes the rotation of the front part of the distance driven by the energy storage compression spring 280 and then completes the rotation of the second half of the distance driven by the energy storage torsion spring 270, thereby achieving the opening effect of the energy storage turntable 240 moving first and the output turntable 250 moving later.

[0025] like Fig.11 As shown, the transmission mechanism 300 includes a second upper shell 340, an input gear 310, and a first output gear 320 with a central axis L1 and a second output gear 330 with a central axis L2 which are respectively meshed and connected on both sides of the input gear 310. The input gear 310 is coaxially plugged with the output shaft 251 to form a transmission, driving the first output gear 320 and the second output gear 330 to rotate synchronously.

[0026] The conductive system 400 is an eight-pole conductive system, including eight groups of switch units, which are arranged in a four-layer eight-pole arrangement, with the first layer close to one end of the transmission mechanism 300 being marked as the first layer, and the rest being marked as the second layer, the third layer, and the fourth layer in the first direction A. Each group of switch units includes a moving contact assembly 420, a stationary contact assembly 430, and an arc extinguishing chamber 440. Specifically, the conductive system 400 includes a switch housing assembly consisting of five switch housing units 410 stacked and connected along the first direction A, such as Fig.12 , Fig.13As shown, two switch unit cavities separated from each other and located on the same layer are formed between adjacent switch housing units 410, and a first switch unit and a second switch unit are respectively installed in the two switch unit cavities. Each group of switch units includes a moving contact assembly 420, a static contact assembly 430 and two groups of arc extinguishing chambers 440. The moving contact assemblies 420 of the first switch unit and the second switch unit respectively rotate around the axis L1 and the axis L2 as the center axis to perform opening and closing actions. A group of static contact assemblies 430 includes two static contacts 431 respectively arranged on the upper and lower sides of the moving contact assembly 420, and the two groups of arc extinguishing chambers 440 are respectively arranged on the left and right sides of the moving contact assembly 420 for arc extinguishing. Among them, the two groups of moving contact assemblies 420 near one end of the transmission mechanism 300 are respectively connected to the first output gear 320 and the second output gear 330 for applying rotational force, and the two groups of moving contact assemblies 420 adjacent to each other along the first direction A are plugged into each other to sequentially transmit the rotational force, so that the first output gear 320 and the second output gear 330 respectively drive the multiple groups of moving contact assemblies 420 with L1 as the central axis and the multiple groups of moving contact assemblies 420 with L2 as the central axis, and due to the motion characteristics and arrangement of the gears, the first output gear 320 and the second output gear 330 have the same rotation direction, so the rotation direction and rotation angle of the moving contact assembly 420 are exactly the same. The transmission ratio of the gear matching can also be changed to realize the switching transmission of different rotation angles of the operating mechanism 200 and the conductive system 400.

[0027] The stationary contacts 431 of this embodiment are connected to the wiring members 432. The structures of the wiring boards 432 connected to the stationary contacts 431 of adjacent layers are as follows: Fig.14 , Fig.15 As shown, it includes a conductive plate 4321 and a wiring board 4322. One end of the conductive plate 4321 extends into the switch unit cavity and is connected to the static contact 431, and the other end is located outside the switch unit cavity. The conductive plate 4321 is arranged along the first direction A and has two bends. The bending directions of the conductive plates 4321 connected to the static contacts 431 of adjacent layers along the first direction A are opposite, so that the angle of the end located outside the switch unit cavity relative to the rotation center axis of the moving contact assembly 420 is staggered, thereby increasing the creepage distance. The wiring board 4322 is connected to the end of the conductive plate 4321 located outside the switch unit cavity to form a wiring board. The conductive plate 4321 and the wiring board 4322 are bent and connected, and the wiring board 4322 is arranged perpendicular to the first direction A, as shown in FIG. Fig.16As shown, the wiring boards 4322 of the odd-numbered layers are connected to the lower end of the conductive plate 4321, and the wiring boards 4322 of the even-numbered layers are connected to the upper end of the conductive plate 4321, so that the wiring boards 4322 of the first and second layers are located at the same height or close to the same height, and the wiring boards 4322 of the third and fourth layers are located at the same height or close to the same height, thereby making the arrangement of the wiring structure of the overall four-layer eight-pole structure become an arrangement similar to that of two layers of four poles, so that the positive and negative poles can be wired on the same layer every two layers, which is convenient for users to wire.

[0028] The load isolation multi-pole switch of this embodiment is a modular assembly structure, that is, the transmission mechanism 300 and the conductive system 400 are connected to form an independent module, the second upper shell 340 is connected to one end of the switch shell assembly to form a transmission cavity of the limit transmission mechanism 300, and a through hole is provided on the second upper shell 340 corresponding to the input gear 310 for the output shaft 351 to be inserted into the transmission, and the operating mechanism 200 forms an independent module. The two modules are fixed by threaded fasteners, and the two ends of the input shaft 260 are respectively plugged into the handle 100 and the operating mechanism 200 to form synchronous rotation.

[0029] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A rotary disconnector with a novel wiring structure, comprising a conductive system (400), the conductive system (400) comprising at least two groups of switch units arranged in sequence along a first direction (A), each group of switch units comprising a moving contact assembly (420) and a stationary contact assembly (430), the rotation center axis of the moving contact assembly (420) being arranged along the first direction (A), the stationary contact assembly (430) having a wiring board (4322), characterized in that: The wiring boards (4322) of every two groups of switch units adjacent to each other along the first direction (A) are located in the same wiring layer.

2. The rotary disconnector with a novel wiring structure according to claim 1 is characterized in that: The plane where the wiring board (4322) is located is located between the rotation planes of the two sets of moving contact assemblies (420).

3. The rotary disconnector with a novel wiring structure according to claim 2 is characterized in that: The stationary contact assembly (430) comprises a stationary contact (431) and a conductive plate (4321); the stationary contact (431) cooperates with the moving contact assembly (420) for opening and closing the switch; one end of the conductive plate (4321) is connected to the stationary contact (431) and the other end is connected to the wiring board (4322); the conductive plate (4321) has two bends; the bending directions of the conductive plates (4321) of adjacent layers along a first direction (A) are opposite, so that the angle of one end located outside the switch unit cavity relative to the rotation center axis of the moving contact assembly (420) is staggered.

4. The rotary disconnector with a novel wiring structure according to claim 3 is characterized in that: The conductive plate (4321) is arranged along a first direction (A), the plane where the wiring board (4322) is located is perpendicular to the first direction (A), and the conductive plate (4321) and the wiring board (4322) are connected by bending, the wiring boards (4322) of odd layers are connected to the lower end of the conductive plate (4321), and the wiring boards (4322) of even layers are connected to the upper end of the conductive plate (4321).

5. The rotary disconnector with a novel wiring structure according to any one of claims 1 to 4, characterized in that: The switch units are divided into a first switch unit and a second switch unit. The moving contact assemblies (420) of the first switch unit and the second switch unit respectively perform a rotation opening and closing action with the axis (L1) and the axis (L2) as the central axis. The first switch unit and the second switch unit adjacent to each other along the second direction constitute a switch unit group located on one layer. The planes where the wiring boards (4322) of the switch units located on the same layer are located are located on the same plane.

6. The rotary disconnector with a novel wiring structure according to claim 5 is characterized in that: The conductive system (400) comprises a switch housing assembly consisting of switch housing units (410) stacked and connected in a first direction (A), two switch unit cavities separated from each other and located in the same layer are formed between adjacent switch housing units (410), and a group of first switch units and a group of second switch units are respectively installed in the two switch unit cavities.

7. The rotary disconnector with a novel wiring structure according to claim 5 is characterized in that: The invention also comprises a transmission mechanism (300), the transmission mechanism (300) comprising an input gear (310) and a first output gear (320) having a central axis (L1) and a second output gear (330) having a central axis (L2) respectively meshed with each other on both sides of the input gear (310), the first output gear (320) and the second output gear (330) respectively being plug-in transmission matched with the moving contact assemblies (420) of the first switch unit and the second switch unit located on the first layer, for applying a rotational force, and two sets of moving contact assemblies (420) adjacent to each other along the first direction (A) are plug-in connected to each other for sequentially transmitting the rotational force.

8. The rotary disconnector with a novel wiring structure according to claim 7 is characterized in that: The invention comprises an operating mechanism (200), wherein the operating mechanism (200), a transmission mechanism (300), and a conductive system (400) are arranged in sequence along a first direction (A); the operating mechanism (200) comprises an input rotating shaft (260) and an output rotating shaft (251); the input rotating shaft (260), the output rotating shaft (251), and an input gear (310) are arranged concentrically; the input rotating shaft (260) is used to input a rotational driving force; and the output rotating shaft (251) and the input gear (310) are plug-connected and transmission-matched to output a rotational driving force.

9. The rotary disconnector with a novel wiring structure according to claim 8 is characterized in that: The operating mechanism (200) comprises a first upper housing (210), a first lower housing (220), and an input rotary disc (230), an energy storage rotary disc (240), and an output rotary disc (250) which are limited between the first upper housing (210) and the first lower housing (220) and are connected in sequence; the input rotary disc (230) is circumferentially linked and connected to an input rotating shaft (260); both ends of the energy storage rotary disc (240) are connected to energy storage compression springs (280); when the input rotary disc (230) is opened or closed, it can be rotated relative to the energy storage rotary disc (240) at a certain angle before forming a linkage; and in the process of forming a linkage between the input rotary disc (230) and the energy storage rotary disc (240), the energy storage compression spring (280) stores energy to a starting point.

10. The rotary disconnector with a novel wiring structure according to claim 9, characterized in that: An energy storage torsion spring (270) is provided between the energy storage rotary disk (240) and the output rotary disk (250), and an elastic positioning member (290) is provided between the output rotary disk (250) and the first lower housing (220). When the operating mechanism (200) is in a closed state and the energy storage rotary disk (240) rotates from closed to open in the front part, the elastic positioning member (290) locks the output rotary disk (250) so that it cannot rotate, and the energy storage rotary disk (240) can be relatively The output rotary disc (250) is rotated to store energy in the energy storage torsion spring (270); during the latter part of the process in which the energy storage rotary disc (240) rotates from closing to opening, the locking effect of the elastic positioning member (290) on the output rotary disc (250) is released and the energy storage rotary disc (240) and the output rotary disc (250) are linked to each other until the energy storage rotary disc (240) rotates to the opening position; and the output rotary disc (250) rotates to the opening position under the energy release effect of the energy storage torsion spring (270).

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