Transmission structure, external electric operation structure and reclosing circuit breaker

Abstract

The utility model discloses a transmission structure, an external electric operation structure and a reclosing circuit breaker, and the transmission structure is characterized in that a sliding block is also provided with a driving groove, the driving groove comprises a first area and a second area, and an eccentric wheel moves in the first area and the second area along with the rotation of a rocker arm; the wall of the first area or the wall of the second area is touched in the moving process, so that the sliding block moves; when the eccentric wheel touches the wall of the first area, the sliding block is driven to move to a second position to realize opening operation; when the eccentric wheel touches the wall of the second area, the sliding block is driven to move to the first position, and switching-on operation is achieved. An elastic piece is fixed to the sliding block, and the movable end of the elastic piece stretches into the position between the first area and the second area. When the eccentric wheel moves from the second area to the first area, the eccentric wheel extrudes the movable end to deform and store energy, and when the eccentric wheel is ready to move to the second area, the movable end recovers deformation to push the eccentric wheel to enter the second area; the device has the advantage of being more stable in structure.

Description

Technical Field

[0001] The present application relates to the electrical field of low-voltage switches, and in particular to an electric operating structure of a circuit breaker, and in particular to a transmission structure. Background Art

[0002] In the field of operating mechanisms of molded case circuit breakers, electric operating mechanisms are often used to achieve automatic opening and closing. Existing electric operating mechanisms are divided into two types: one is an electric operating mechanism suitable for AC motors, and the other is an electric operating mechanism suitable for DC motors.

[0003] Because DC motors have a unidirectional driving force, their electric operating mechanism often utilizes a slider-crank mechanism. This motor-driven slider-crank mechanism, which achieves opening and closing operations, divides its reciprocating motion into two stages: one for closing and one for opening. In other words, the motor stops rotating after the circuit breaker reaches either the closed or open state. Ideally, the next stage of operation would be executed upon powering up the motor, but this assumes the crank and slider always reach the proper mating position. With existing circuit breakers, after the opening operation, the motor is de-energized, and the crank does not always reach the proper position (the proper position being the position suitable for the next closing drive). Consequently, closing the circuit breaker is impossible upon powering up the motor again.

[0004] Therefore, how to improve the transmission mechanism of the existing crank slider to ensure that the crank can be moved to the appropriate position after the opening operation is completed has become a problem that needs to be solved. Summary of the Invention

[0005] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide a transmission structure, an external electric operation structure and a reclosing circuit breaker.

[0006] The present application provides: a transmission structure comprising:

[0007] The rocker arm is rotatably arranged along a rotation center and has an eccentric wheel;

[0008] The slider is slidably arranged between a first position and a second position along a straight line; a matching groove is provided on the slider for driving the mechanism handle to move synchronously, the first position corresponds to the position of the mechanism handle in the closed state, and the second position corresponds to the position of the mechanism handle in the open state;

[0009] Among them, a driving groove is also provided on the slider, and the driving groove includes a first area and a second area. As the rocker arm rotates, the eccentric wheel moves in the first area and the second area, and touches the wall of the first area or the wall of the second area during the movement to cause the slider to move; when the eccentric wheel touches the wall of the first area, the slider is driven to move to the second position to realize the opening operation; when the eccentric wheel touches the wall of the second area, the slider is driven to move to the first position to realize the closing operation; an elastic part is fixed on the slider, and the movable end of the elastic part extends between the first area and the second area; when the eccentric wheel moves from the second area to the first area, the eccentric wheel squeezes the movable end to cause it to deform and store energy, and when the eccentric wheel is ready to move to the second area, the movable end restores the deformation to push the eccentric wheel into the second area.

[0010] In some embodiments of the present application, the elastic member is a torsion spring, which includes a coil and a movable end. The slider is provided with a positioning post, the coil is sleeved on the positioning post, and the movable end extends between the first area and the second area.

[0011] In some embodiments of the present application, the elastic member is a spring sheet, the slider has a slot, the spring sheet is partially stuck in the slot, and the movable end extends between the first area and the second area.

[0012] In some embodiments of the present application, the elastic member is a spring sheet, the slider has a slot, the spring sheet is partially stuck in the slot, and the movable end extends between the first area and the second area.

[0013] In some embodiments of the present application, a limiting member is further included, which is detachably fixed to the slider and at least partially blocks the direction in which the ring portion separates from the positioning column to limit the ring portion from separating from the positioning column.

[0014] In some embodiments of the present application, a limiting member is included, which is detachably fixed to the slider and at least partially blocks the direction in which the spring piece escapes from the slot to limit the spring piece from escaping the slot.

[0015] In some embodiments of the present application, a first drive wall is provided on the first area, and a second drive wall is provided on the second area. The first drive wall and the second drive wall are arranged in parallel. The eccentric wheel cooperates with the first drive wall to move the slider to the second position, and the eccentric wheel cooperates with the second drive wall to move the slider to the first position.

[0016] In some embodiments of the present application, when the movable end is not squeezed, the angles between the movable end and the first driving wall and the second driving wall are both obtuse angles.

[0017] In some embodiments of the present application, the first driving wall and the second driving wall are both arranged perpendicular to the movement direction of the slider.

[0018] In some embodiments of the present application, an input shaft is further included, the input shaft is linked to the rocker arm, and a tool hole is opened at the upper end of the input shaft.

[0019] In some embodiments of the present application, an input shaft, a transmission gear and a one-way transmission structure are also included. The input shaft and the rocker arm are arranged in a linkage manner. The transmission gear is sleeved on the input shaft and connected through the one-way transmission structure. The one-way transmission structure enables the transmission gear and the input shaft to be linked in one rotation direction and to be released in the opposite rotation direction.

[0020] In some embodiments of the present application, the eccentric wheel is a roller.

[0021] In some embodiments of the present application, a guide rail is further included, and the slider is slidably arranged along the guide rail.

[0022] In some embodiments of the present application, the slider includes a sliding block and a fixed block, the fixed block is fixed above the sliding block, the drive groove is formed on the fixed block, or the drive groove is formed on the fixed block and the sliding block; an installation groove is opened on one of the sliding block and the fixed block, and the elastic member is partially installed in the installation groove.

[0023] An external electric operation structure comprises an electric operation shell, wherein the above-mentioned transmission structure is arranged inside the electric operation shell.

[0024] A reclosing circuit breaker includes a base, a middle cover, and a top cover, wherein the middle cover is arranged on the base, and the top cover is arranged on the middle cover; an accommodating space is formed by the top cover and the middle cover, and one end of a mechanism handle is located in the accommodating space; wherein the transmission structure is arranged in the accommodating space, and the matching groove of the slider is sleeved on the mechanism handle.

[0025] In some embodiments of the present application, a circuit board assembly is provided in the accommodating space, and the circuit board assembly has an auxiliary power supply, which is a replaceable battery; a disassembly hole is provided on the top cover, and the disassembly hole is used for installing and removing the battery; and a sealing cover is also included, which is detachably matched with the top cover and is used to close the battery hole.

[0026] The beneficial effects of this application include:

[0027] The transmission structure provided by the present application is more stable than the existing technology. The reason is that an elastic member is added to the existing structure, and the movable end of the elastic member extends between the first area and the second area. When the eccentric wheel moves from the second area to the first area, the eccentric wheel squeezes the movable end to deform and store energy. When the eccentric wheel is ready to move to the second area, the movable end restores the deformation and pushes the eccentric wheel into the second area. The eccentric wheel is ready to move to the second area here, which means that the circuit breaker has completed the opening operation and the eccentric wheel is no longer moving to the first area. At this time, the movable end restores the deformation and can push the eccentric wheel into the second area, so that when the motor is powered on next time, the second area can be in the second area to achieve the closing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 A schematic diagram of the transmission structure of Example 1 of the present application is shown;

[0030] Figure 2 A schematic diagram of components such as a slider, a rocker arm, and an eccentric wheel in the transmission structure of Example 1 of the present application is shown;

[0031] Figure 3 A schematic diagram of a slider in the transmission structure of Example 1 of the present application is shown;

[0032] Figure 4 A schematic diagram of a rocker arm in the transmission structure of Example 1 of the present application is shown;

[0033] Figure 5 A schematic diagram of a slider, an elastic member, and a limiting member in the transmission structure of Example 1 of the present application is shown;

[0034] Figure 6 A schematic diagram of a slider and an elastic member in the transmission structure of Example 1 of the present application is shown;

[0035] Figure 7 A schematic diagram showing a transmission structure in accordance with Embodiment 1 of the present application in which the elastic member is a spring sheet;

[0036] Figure 8 A schematic diagram showing the eccentric wheel reaching the second area in the transmission structure of Example 1 of the present application is shown;

[0037] Figure 9 A schematic diagram showing the eccentric wheel entering the first area in the transmission structure of Example 1 of the present application is shown;

[0038] Figure 10 A schematic diagram showing the eccentric wheel in the transmission structure of Example 1 of the present application in the final position of the first area (when preparing to enter the second area);

[0039] Figure 11 A schematic diagram of the input shaft and transmission gear in the transmission structure of Example 1 of the present application is shown;

[0040] Figure 12 A schematic diagram of a one-way transmission structure between an input shaft and a transmission gear in a transmission structure according to embodiment 1 of the present application is shown;

[0041] Figure 13 A schematic diagram showing another embodiment of the slider in Example 1 of the present application is shown;

[0042] Figure 14 A schematic diagram showing an elastic member and a sliding block in another embodiment of the slider in Example 1 of the present application is shown;

[0043] Figure 15 A schematic diagram showing the application of the transmission structure of Example 1 of the present application to a reclosing circuit breaker is shown;

[0044] Figure 16 A schematic diagram of a reclosing circuit breaker without a top cover is shown in Example 1 of the present application;

[0045] Figure 17 A partial enlarged view of the disassembly and assembly hole of the reclosing circuit breaker in Example 1 of the present application is shown;

[0046] Figure 18 A schematic diagram of the cover of the reclosing circuit breaker in Example 1 of the present application is shown. DETAILED DESCRIPTION

[0047] The following describes in detail embodiments of the present application. Examples of these embodiments are illustrated in the accompanying drawings, where identical or similar reference numerals throughout represent identical or similar elements or elements having identical or similar functions. The embodiments described below with reference to the accompanying drawings are illustrative and intended only to explain the present application and are not to be construed as limiting the present application.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present application.

[0049] Furthermore, the terms "primary" and "secondary" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "primary" or "secondary" may explicitly or implicitly include one or more of such features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0050] In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0051] In this application, unless otherwise expressly specified or limited, "above" or "below" a main feature may mean that the main feature and the second feature are in direct contact, or that the main feature and the second feature are in indirect contact through an intermediary. Furthermore, "above," "above," and "above" a main feature may mean that the main feature is directly above or diagonally above the second feature, or simply means that the main feature is higher in level than the second feature. "below," "below," and "below" a main feature may mean that the main feature is directly below or diagonally below the second feature, or simply means that the main feature is lower in level than the second feature. Example

[0052] like Figures 1-14 As shown, embodiment 1 of the present application provides a transmission structure, which is applicable to both external electric operation structures and reclosing circuit breakers.

[0053] The specific structure of this transmission structure is as follows:

[0054] The rocker arm 100 is rotatably mounted about a rotational center. The rocker arm 100 includes an eccentric wheel 101. The eccentric wheel 101 is a wheel-shaped structure offset from the rotational center of the rocker arm 100. This wheel can be a roller or a non-roller. In this embodiment, a roller is used to minimize friction during transmission.

[0055] The slider 200 is arranged to slide along a straight line. It has a mating slot 201 that allows it to be fitted over the mechanism handle 300, achieving synchronized movement between the slider 200 and the mechanism handle 300. The slider 200 has a first position F2 and a second position F2. The first position corresponds to the mechanism handle 300 being in the closed state (i.e., the circuit breaker is closed). The second position F2 corresponds to the mechanism handle 300 being in the open state (i.e., the circuit breaker is open).

[0056] The eccentric wheel 101 and the slider 200 form a crank slider 200 mechanism, that is, the slider 200 can be driven to move back and forth through the rotation of the rocker arm 100. One complete reciprocating motion represents that the mechanism handle 300 can complete one opening operation and one closing operation.

[0057] Here, the slider 200 includes a driving groove 202, and the eccentric wheel 101 extends into the driving groove 202 and cooperates with the driving groove 202 to realize the crank slider 200 mechanism. Here, the driving groove 202 includes a first area 202a and a second area 202b.

[0058] When the eccentric wheel 101 contacts the wall of the first region 202a, it can push the slider 200 toward the second position F2. This wall is the first drive wall 202a1. When the eccentric wheel 101 contacts the wall of the second region 202b, it can push the slider 200 toward the first position. This wall is the second drive wall 202b1. Both the first drive wall 202a1 and the second drive wall 202b1 are arranged perpendicular to the direction of movement of the slider 200.

[0059] The elastic member 400 is fixed to the slider 200. One end of the elastic member 400 extends toward the first region 202a and the second region 202b. This end, also called the movable end 401, is located between the first region 202a and the second region 202b. When the eccentric 101 moves from the second region 202b into the first region 202a, the eccentric 101 compresses the movable end 401, causing it to deform until the eccentric 101 pushes against the first drive wall 202a1, causing the slider 200 to move to the second position F2, thereby opening the circuit breaker. At this point, the motor is powered off, and the eccentric 101 has already moved to its final position in the first region 202a (i.e., preparing to move to the second region 202b). As the movable end 401 recovers its deformation, it pushes the eccentric 101 into the second region 202b, placing it in the proper position for the next closing operation when the motor is powered on.

[0060] Here, when the movable end 401 is not squeezed, the included angles between the movable end 401 and the first driving wall 202a1 and the second driving wall 202b1 are all obtuse angles. Such an obtuse angle design is conducive to squeezing the movable end 401 by the eccentric wheel 101.

[0061] Here, there are many options for the elastic member 400. The following are two relatively simple examples:

[0062] like Figure 2-6 As shown, the elastic member 400 is a torsion spring comprising a first branch, a loop 402, and a movable end 401. The slider 200 is provided with a positioning post 210, and the loop 402 is sleeved onto the positioning post 210. The first branch abuts against the slider 200, while the movable end 401 extends between the first region 202a and the second region 202b. This torsion spring design is a relatively traditional spring type, offering excellent performance and a stable structure.

[0063] For this torsion spring solution, the separation of the torsion spring can be limited by a limiting member. In this case, the limiting member is a fastening screw 250, which is fixed to the slider 200. The fastening screw 250 can block the direction in which the ring portion 402 separates from the positioning post 210, thereby preventing the ring portion 402 from separating from the positioning post 210. Of course, the fastening screw 250 here can be fixed or unfixed to the positioning post 210, as long as it can prevent the ring portion 402 from separating from the positioning post 210. At the same time, the limiting member is not limited to screws. For example, some plate-like or block-like structures can also be used, as long as they can form a fixed fit with the slider 200 (such as a snap fit, screw fit, interference fit, etc.) and prevent the ring portion 402 from separating from the positioning post 210.

[0064] like Figure 7As shown, the elastic member 400 is a leaf spring with a retaining groove 210' on the slider 200. The retaining groove 210' is intended to engage a portion of the leaf spring, preventing it from being directly withdrawn by applying force in the direction of the movable end 401. The movable end 401 of the leaf spring extends between the first region 202a and the second region 202b. The leaf spring is a relatively simple spring with excellent performance and a stable structure.

[0065] The aforementioned restricting member structure also applies to this spring leaf solution. Specifically, a fastening screw 250 is secured to the slider 200, blocking the spring leaf from exiting the retaining slot 210'. Similarly, the restricting member is not limited to the fastening screw 250 solution; reference can be made to the other solutions described above, and will not be further elaborated here.

[0066] In order to make the slider 200 move more smoothly, two guide rails 500 are used. The guide rails 500 pass through the slider 200 so that the slider 200 can slide along the guide rails 500.

[0067] As for the rotational power source of the rocker arm 100, it can be manually driven or electrically driven, which is specifically achieved as follows.

[0068] As an alternative to the slider 200, the slider 200 includes a sliding block 200a and a fixed block 200b. The sliding block 200a is made of plastic, while the fixed block 200b is made of metal. The sliding block 200a is mounted on the guide rail 500, and the fixed block 200b is fixed to the sliding block 200a, here by screw fastening. A drive slot 202 is formed in the fixed block 200b and the sliding block 200a. In this arrangement, the sliding block 200a is provided with a mounting slot 200c, and a portion of the elastic member 400 is fixed in the mounting slot 200c, with the movable end 401 located between the first region 202a and the second region 202b. This structure divides the slider 200 into two parts, facilitating its processing and minimizing its weight while ensuring stable fit with the rocker arm 100 (for example, by using two materials, the metal fixed block can ensure strong fit with the rocker arm). In addition, the mounting groove 200c may also be formed on the fixing block 200b, or the driving groove 202 may only be formed on the fixing block 200b.

[0069] The input shaft 600 is in transmission connection with the rocker arm 100, which means that a keyway is provided on the rocker arm 100, and the protrusion of the input shaft 600 extends into the keyway of the rocker arm 100 to form a linkage. In this way, when the input shaft 600 rotates, the rocker arm 100 can also rotate with it.

[0070] A tool hole 601 is provided at the top of the input shaft 600. The user can insert an external handle into the tool hole 601 to drive the input shaft 600 to rotate. This is a manual driving method. The shape of the tool hole 601 can be any non-circular shape.

[0071] A transmission gear 700 is also mounted on the input shaft 600, and is interlocked with the input shaft 600. The transmission gear 700 is a member of a reduction gear set. The input gear of the reduction gear set is coupled with a unidirectional DC motor 800, so that the motor 800 drives the transmission gear 700 to rotate the input shaft 600.

[0072] Of course, to enable manual actuation, the linkage between the input shaft 600 and the transmission gear 700 is disengaged, thereby reducing the manual actuation force (not driving the gears and the rotor of the motor 800). The linkage between the input shaft 600 and the transmission gear 700 is achieved via a one-way transmission structure, meaning that the transmission gear 700 and the input shaft 600 are linked in one rotational direction and disengaged in the opposite rotational direction.

[0073] The specific one-way transmission structure comprises a driving finger 901, a spring 902, and a transmission channel. The transmission channel is a hole formed in the transmission gear 700. The hole wall comprises a stop wall 903 and a curved wall 904, with the curved wall 904 located clockwise from the stop wall 903. The driving finger 901 is disposed on the input shaft 600 and can slide radially along the input shaft 600. The elastic member 400 is a spring structure that stores energy as the driving finger 901 retracts into the input shaft 600. The driving finger 901 is located outside the input shaft 600. When the input shaft 600 rotates in a first direction S1, the driving finger 901 slides along the curved wall 904, gradually retracting into the input shaft 600. As there is no radial force transmission relationship between the driving finger 901 and the transmission channel, the input shaft 600 disengages from the transmission gear 700 (disengagement in this context means that no force is transmitted between the two).

[0074] However, when the transmission gear 700 rotates in the first direction S1 (clockwise), the stop wall 903 acts on the driving finger 901, and the two are stuck in the radial direction. That is, there is a force transmission relationship between the driving finger 901 and the transmission channel in the radial direction, so the transmission gear 700 will drive the input shaft 600 to rotate.

[0075] As an application, the above-mentioned transmission structure can be applied in a reclosing circuit breaker.

[0076] like Figure 15-18As shown, the reclosing circuit breaker includes a base 1100, a middle cover 1200, a top cover 1300, a circuit board assembly 1400, an operating mechanism, a contact assembly, an arc extinguishing assembly, and the like.

[0077] Here, the base 1100 is located below the middle cover 1200, and bolts are used to fasten the base 1100 and the middle cover 1200. Above the middle cover 1200 is the top cover 1300, and bolts are also used to fasten the top cover 1300 and the middle cover 1200. Of course, bolts can also be used to fasten all three together, or other fastening methods can be used, as long as the structure of the three is stable.

[0078] The top cover 1300 and the middle cover 1200 together form a receiving space 1250 , in which the circuit board assembly 1400 and the above-mentioned transmission structure are arranged.

[0079] Circuit board assembly 1400, also called circuit board assembly 1400, is composed of multiple circuit boards and is located within the space formed by middle cover 1200 and top cover 1300, with the majority of the circuit boards located in the upper space. Circuit board assembly 1400 includes communication functions, protection functions, and control of starting and stopping the unidirectional DC motor 800. Protection functions include short-circuit protection, overload protection, leakage protection, phase loss protection, overtemperature protection, and over- and undervoltage protection. Circuit board assembly 1400 also includes an auxiliary power supply 1450, which is a replaceable battery.

[0080] A disassembly hole 1350 is provided on the top cover 1300, through which the user can install and remove the battery. A cover 1500 is also provided at the disassembly hole. The cover 1500 is detachably fixed to the top cover 1300, specifically, it utilizes a rotating structure. A first clip 1355 is interrupted on the wall of the disassembly hole 1350, and a corresponding second clip 1505 is provided on the cover 1500. Place the second clip 1505 in the interrupted position of the first clip 1355, then rotate the cover 1500 so that the first clip 1355 and the second clip 1505 intersect, thereby securing the cover 1500 to the top cover 1300. To remove the cover, simply rotate the cover 1500 in the opposite direction to remove the second clip 1505 from the interrupted position of the first clip 1355.

[0081] The operating mechanism is fixed to the base 1100. One end of the operating mechanism handle 300 penetrates the middle cover 1200 and is located in the accommodating space 1250 to cooperate with the slider 200. In this way, the movement of the slider 200 can drive the mechanism handle 300 to move, realizing the opening and closing of the circuit breaker.

[0082] As another application, the aforementioned transmission structure can be used in an external electric control structure. This external electric control structure includes an electric control housing with a transmission structure within it. This external electric control structure is a modular accessory that can be directly installed in a molded case circuit breaker, enabling electric operation of the breaker.

[0083] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and integrate different embodiments or examples, and features of different embodiments or examples, described in this specification, unless otherwise inconsistent.

[0084] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A transmission structure comprising: The rocker arm is rotatably arranged with a rotation center and has an eccentric wheel; The slider is slidably arranged between a first position and a second position along a straight line; a matching groove is provided on the slider for driving the mechanism handle to move synchronously, the first position corresponds to the position of the mechanism handle in the closed state, and the second position corresponds to the position of the mechanism handle in the open state; Its characteristics are: The slider is also provided with a driving groove, which includes a first area and a second area. As the rocker arm rotates, the eccentric wheel moves between the first area and the second area, and during the movement, it touches the wall of the first area or the wall of the second area to cause the slider to move. When the eccentric wheel touches the wall of the first area, the slider is driven to move to the second position to realize the opening operation; when the eccentric wheel touches the wall of the second area, the slider is driven to move to the first position to realize the closing operation; an elastic member is fixed on the slider, and the movable end of the elastic member extends between the first area and the second area; when the eccentric wheel moves from the second area to the first area, the eccentric wheel squeezes the movable end to cause it to deform and store energy, and when the eccentric wheel is ready to move to the second area, the movable end restores its deformation to push the eccentric wheel into the second area.

2. A transmission structure according to claim 1, characterized in that: The elastic member is a torsion spring, which includes a coil and a movable end. The slider is provided with a positioning post, the coil is sleeved on the positioning post, and the movable end extends between the first area and the second area. Alternatively, the elastic member is a spring sheet, the slider is provided with a slot, the spring sheet is partially locked in the slot, and the movable end extends between the first area and the second area.

3. A transmission structure according to claim 2, characterized in that: The device further comprises a limiting member, which is detachably fixed to the slider and at least partially blocks the direction in which the ring portion separates from the positioning post, thereby limiting the ring portion from separating from the positioning post; Alternatively, a limiting member is further included, which is detachably fixed to the slider and at least partially blocks the direction in which the spring piece escapes from the slot, so as to limit the spring piece from escaping the slot.

4. A transmission structure according to claim 1, characterized in that: A first driving wall is provided on the first area, and a second driving wall is provided on the second area. The first driving wall and the second driving wall are arranged in parallel. The eccentric wheel cooperates with the first driving wall to move the slider to the second position, and the eccentric wheel cooperates with the second driving wall to move the slider to the first position.

5. A transmission structure according to claim 4, characterized in that: When the movable end is not squeezed, the included angles between the movable end and the first driving wall and the second driving wall are both obtuse angles; and / or the first driving wall and the second driving wall are both arranged perpendicular to the movement direction of the slider.

6. The transmission structure according to claim 1, characterized in that: It also includes an input shaft, which is linked to the rocker arm and has a tool hole at the upper end of the input shaft; And / or, it further includes an input shaft, a transmission gear, and a one-way transmission structure, wherein the input shaft and the rocker arm are arranged in a linkage manner, the transmission gear is sleeved on the input shaft and connected via the one-way transmission structure, and the one-way transmission structure enables the transmission gear and the input shaft to be linked in one rotation direction and to be released in the opposite rotation direction; And / or, the eccentric wheel is a roller; and / or, it also includes a guide rail, and the slider is slidably arranged along the guide rail.

7. The transmission structure according to claim 1, characterized in that: The slider includes a sliding block and a fixed block, the fixed block is fixed above the sliding block, the driving groove is formed on the fixed block, or the driving groove is formed on the fixed block and the sliding block; one of the sliding block and the fixed block is provided with an installation groove, and the elastic part is partially installed in the installation groove.

8. An external electric control structure, comprising an electric control housing, characterized in that: The transmission structure according to any one of claims 1 to 7 is arranged in the electric operation housing.

9. A reclosing circuit breaker comprising a base, a middle cover, and a top cover, wherein the middle cover is disposed on the base and the top cover is disposed on the middle cover; an end of a mechanism handle is located within a receiving space formed by the top cover and the middle cover; and characterized in that: The transmission structure according to any one of claims 1 to 7 is arranged in the accommodating space, and the matching groove of the slider is sleeved on the mechanism handle.

10. The reclosing circuit breaker according to claim 9, characterized in that: A circuit board assembly is arranged in the accommodating space, and the circuit board assembly has an auxiliary power supply, which is a replaceable battery; a disassembly hole is opened on the top cover, and the disassembly hole is used to install and remove the battery; it also includes a sealing cover, which is detachably matched with the top cover and is used to close the battery hole.

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