Operating mechanism and switching device

Abstract

The utility model relates to the field of low-voltage electric appliances, in particular to an operating mechanism and a switching device comprising the operating mechanism. In the operating mechanism, one end of a locking piece is rotationally arranged, the other end of the locking piece is provided with a locking piece matching part, and the matching piece is arranged on the traction rod and synchronously rotates with the traction rod around the rotating axis of the traction rod; when the operating mechanism is in a normal state, the jump fastener and the locking fastener are in hasp fit, and the matching part of the locking fastener and the matching part are in first limiting fit; the traction rod is driven by tripping external force to rotate to drive the matching piece and the locking piece matching part to release the first limiting matching, and the tripping piece rotates under the action of the main spring and drives the locking piece to rotate, so that the tripping piece and the locking piece are released from the hasp matching, and the locking piece matching part and the matching piece are in second limiting matching; the operating mechanism and the switching device are simpler in structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low voltage electrical apparatus, specifically relates to an operating mechanism and a switch electrical apparatus comprising the operating mechanism. BACKGROUND

[0002] The existing molded case circuit breaker all comprises an operating mechanism and a contact system, the contact system comprises a movable contact assembly and a static contact used in cooperation, the operating mechanism drives the movable contact assembly to rotate to close and disconnect with the static contact, wherein the operating mechanism generally comprises a bracket, a traction rod, a lock catch, a jump catch, a re-catch, a main spring, a rocker arm component, an upper connecting rod and a lower connecting rod, etc., and the operating mechanism at least has the following deficiencies:

[0003] I. The lock catch, the jump catch and the re-catch and other components need to be cooperated to realize the conversion of the operating mechanism between the four connecting rods and the five connecting rods, the structure is complex, the components are many, the assembly is complicated, and the service life is not long enough.

[0004] II. For the existing molded case circuit breaker, the opening distance of the movable contact assembly and the static contact is the same when normally opening and tripping, if the opening distance is set to be large, although the breaking capacity is improved, the action stroke of the upper connecting rod, the lower connecting rod and the main spring is large, which affects the mechanical life of the product, if the opening distance is set to be small, although the mechanical life of the product is ensured, the breaking capacity of the product is limited. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at overcoming at least one defect of the prior art, providing an operating mechanism and a switch electrical apparatus comprising the operating mechanism, and the structure is simpler.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] An operating mechanism comprises a bracket, a lock catch and a rocker arm component rotatably arranged on the bracket respectively, a jump catch rotatably arranged on the bracket at one end and matched with the lock catch at the other end, an upper connecting rod rotatably connected with the middle part of the jump catch at one end and provided with a second shaft at the other end, a main spring connected to the rocker arm component at one end and to the second shaft at the other end, and a traction rod rotatably arranged; the second shaft is also used for driving connection with a movable contact assembly of a switch electrical apparatus; the main spring provides energy for the opening, closing and tripping operation of the operating mechanism;

[0008] The operating mechanism further comprises a matching part arranged on the traction rod and synchronously rotating with the traction rod around the rotation axis of the traction rod;

[0009] The lock catch is rotatably arranged at one end and provided with a lock catch matching part at the other end;

[0010] The operating mechanism is in normal state, the snap element and the lock element keep the snap fit, and the lock element fitting part and the fitting element keep the first limiting fit;

[0011] The traction rod is driven to rotate by the tripping external force, the driving fitting element and the lock element fitting part are released from the first limiting fit, then the snap element is rotated under the action of the main spring and drives the lock element to rotate, the snap element and the lock element are released from the snap fit, and the second limiting fit is established between the lock element fitting part and the fitting element.

[0012] Further, the operating mechanism is in normal state, the fitting element is located on one side of the lock element fitting part along the direction d3; the operating mechanism is in the mechanism tripping state, the fitting element 300 is located on one side of the lock element fitting part along the direction d4; the direction d3 and the direction d4 are perpendicular to each other.

[0013] Further, the fitting element is a cylindrical rod arranged parallel to the rotation axis of the traction rod, the lock element and the rotation axis of the traction rod are parallel to the direction d5, the direction d3, the direction d4 and the direction d5 are perpendicular to each other; the lock element fitting part includes a fitting part first limiting surface and a fitting part second limiting surface, the cylindrical rod is located on one side of the fitting part first limiting surface along the direction d3 and abuts against the fitting part first limiting surface to establish the first limiting fit between the lock element fitting part and the fitting element, and the cylindrical rod is located on one side of the fitting part second limiting surface along the direction d4 and abuts against the fitting part second limiting surface to establish the second limiting fit between the lock element fitting part and the fitting element.

[0014] Further, the traction rod includes a traction rod main body and a fitting element mounting part, the traction rod is arranged to rotate through the traction rod main body, the two fitting element mounting parts are arranged to be opposite and spaced along the rotation axis of the traction rod and are arranged on the traction rod main body, and the two ends of the cylindrical rod are fixedly arranged on the two fitting element mounting parts respectively; the cylindrical rod is a circular cylindrical rod; the traction rod main body includes two groups of traction rod assembly holes arranged along the rotation axis of the traction rod in sequence; the bracket includes two bracket side plates arranged oppositely, each bracket side plate is provided with a traction rod mounting part; the two traction rod mounting parts are respectively inserted into the two groups of traction rod assembly holes and are rotatably connected with the traction rod main body.

[0015] Further, on the projection of the operating mechanism perpendicular to the direction d5, the axis of the fitting element, the rotation axis of the lock element and the rotation axis of the traction rod are located at three vertices of a triangle respectively.

[0016] Further, the lock element includes a lock main plate and a lock element mounting arm, the lock main plate is used for snap fit with the snap element, a pair of sides of the lock main plate are respectively connected with the two groups of lock element mounting arms through bending, the two groups of lock element mounting arms are arranged oppositely along the rotation axis of the lock element, one end of each of the two groups of lock element mounting arms is rotatably arranged on the bracket, and the other end of at least one lock element mounting arm serves as the lock element fitting part.

[0017] Furthermore, one end of the two groups of locking member mounting arms are respectively rotatably arranged on the bracket and the other end serves as the locking member matching portion.

[0018] Furthermore, the jump fastener and the locking fastener always maintain a limited fit.

[0019] Furthermore, one end of the locking main board of the jump fastener and the locking fastener is the main board matching end, and the jump fastener and the main board matching end always abut against each other.

[0020] Furthermore, the jump fastener comprises a jump fastener buckle surface and a jump fastener matching surface connected by bending;

[0021] When the operating mechanism is in a normal state, the buckle surface of the jumper member abuts against the mating end of the mainboard; when the operating mechanism is in a tripped state, the mating surface of the jumper member abuts against the mating end of the mainboard.

[0022] Furthermore, the mating surface of the jump fastener is an arc surface, the center of which coincides with the rotation center of the jump fastener.

[0023] Furthermore, the end of the buckle surface of the jump fastener away from the mating surface of the jump fastener and the end connected to the mating surface of the jump fastener are respectively the distal end of the buckle surface and the proximal end of the buckle surface; the distance between the buckle surface of the jump fastener and the rotation axis of the jump fastener gradually increases from the distal end of the buckle surface to the proximal end of the buckle surface.

[0024] Furthermore, the operating mechanism also includes a reset structure, and the locking member and the traction rod have a tendency to rotate in the same direction under the action of the reset structure.

[0025] Furthermore, the operating mechanism also includes a locking shaft, and the locking member is rotatably arranged on the bracket through the locking shaft; the reset structure is a reset torsion spring, which is sleeved on the locking shaft, and one group of spring arms cooperates with the locking member and the other group of spring arms cooperates with the traction rod.

[0026] Furthermore, the operating mechanism also includes a lower connecting rod, one end of which is hinged to the upper connecting rod through a second shaft and the other end of which is used for transmission connection with the moving contact assembly of the switching electrical appliance.

[0027] Furthermore, when the operating mechanism is in the mechanism-opening state and the mechanism-tripping state, the second shaft and the tripping member are limitedly engaged to prevent the upper connecting rod from rotating relative to the tripping member in the direction d2;

[0028] The second shaft is also used to drive the moving contact assembly to rotate to the moving contact opening position when the operating mechanism switches from the mechanism closing state to the mechanism opening state, so that the opening distance between the moving contact assembly and the corresponding static contact is L1;

[0029] The second shaft is also used to drive the moving contact assembly to rotate to the moving contact tripping position when the operating mechanism is switched from the mechanism closing state to the mechanism tripping state, so that the moving contact assembly is separated from the corresponding static contact by a distance L2.

[0030] Further, the trip member further comprises a trip member limiting surface, and the second shaft abuts against the trip member limiting surface to prevent the upper connecting rod from rotating relative to the trip member in the direction d2 when the operating mechanism is in the mechanism opening state and the mechanism tripping state.

[0031] Further, the trip member limiting surface, the trip member cooperating surface and the trip member limiting surface of the trip member are sequentially connected.

[0032] Further, when the operating mechanism is reclosed, the external force drives the trip member to rotate in the direction d1 to reset through the rocker arm component, the lock member and the traction rod are respectively rotated to reset, the cooperating member and the lock member are released from the second limiting cooperation to establish the first limiting cooperation, and the trip member and the lock member are restored and kept in the snap cooperation; the direction d1 and the direction d2 are opposite directions.

[0033] A switch electric appliance comprises the operating mechanism.

[0034] The operating mechanism of the utility model, its lock member and cooperating member cooperate, compared to the traditional operating mechanism, the reclosing and other components are omitted, the structure of the operating mechanism is simplified, and the reliability and stability of the operating mechanism are ensured, material cost and labor cost are saved.

[0035] In addition, the two groups of lock member mounting arms are matched with the cooperating member, which helps to improve the reliability and stability of the cooperation.

[0036] In addition, when the operating mechanism is normally opened and tripped, the second shaft drives the moving contact assembly to rotate to the moving contact opening position and the moving contact tripping position respectively, so that the moving contact assembly is separated from the static contact by different distances, and when applied to the switch electric appliance, the service life of the operating mechanism of the switch electric appliance is prolonged, and the breaking capacity is ensured.

[0037] The switch electric appliance comprises the operating mechanism, and has a simple structure. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a structural schematic view of the operating mechanism of the utility model under a first visual angle;

[0039] Figure 2 is a partial enlarged structural schematic view of 10 of the utility model; Figure 1

[0040] Figure 3 is a structural schematic view of the operating mechanism of the utility model under a second visual angle; ​

[0041] Figure 4 is a cross-sectional view of the operating mechanism of the utility model, the operating mechanism is in the closed state;

[0042] Figure 5 is a cross-sectional view of the switch device of the utility model, the switch device is in the open state;

[0043] Figure 6 is a cross-sectional view of the switch device of the utility model, the switch device is in the open state;

[0044] Figure 7 is a cross-sectional view of the switch device of the utility model, the switch device is in the open state;

[0045] Figure 8 is a structure schematic view of the utility model's jump buckle piece;

[0046] Figure 9 is a structure schematic view of the utility model's lock buckle piece;

[0047] Figure 10 is a structure schematic view of the utility model's traction rod;

[0048] Figure 11 is a structure schematic view of the utility model's rocker in the first visual angle;

[0049] Figure 12 is a structure schematic view of the utility model's rocker in the second visual angle;

[0050] Figure 13 is a structure schematic view of the utility model's support;

[0051] Figure 14 is a structure schematic view of the utility model's reset structure.

[0052] Explanation of reference signs

[0053] Operating mechanism 1234;

[0054] Support 100, support side plate 110, rotation limiting structure 11123, rocker shaft slot 111, first rocker stop 112, second rocker stop 113, stroke limiting hole 114, support limiting portion 115, traction rod mounting portion 116;

[0055] Traction rod 200, traction rod main body 210, traction rod assembly hole 211, cooperating piece mounting portion 220, traction rod limiting portion 230;

[0056] Cooperating piece 300;

[0057] Reset structure 400, single torsion spring 410, spiral body 411, first spring arm 412, second spring arm 413, spring arm connecting section 414, spring arm assembly section 415, spring connecting rod 420;

[0058] Locking member 500, locking member main plate 510, main plate mating end 511, locking member mounting arm 520, locking member shaft hole 521, locking member spring hole 522, locking member travel limiting portion 530, locking member mating portion 540, mating portion first limiting surface 541, mating portion second limiting surface 542;

[0059] Locking shaft 550;

[0060] Jump fastener 600, jump fastener buckle surface 610, jump fastener matching surface 620, jump fastener limiting surface 630, jump fastener shaft hole 640, jump fastener connecting hole 650, jump fastener blocking portion 660;

[0061] Rocker arm component 700, handle 710, rocker arm 720, rocker arm leg 721, rocker arm crossbeam 722, and trip reset drive unit 724;

[0062] Upper connecting rod 810, upper connecting rod side plate 811;

[0063] Second axis 820;

[0064] Jump buckle shaft 830;

[0065] First axis 840;

[0066] Main spring 850;

[0067] Lower link 860;

[0068] Moving contact assembly 910, supporting shaft 911, moving contact 912;

[0069] Stationary contact 920. DETAILED DESCRIPTION

[0070] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the switch electrical apparatus of the present invention. The switch electrical apparatus of the present invention is not limited to the description of the following embodiments.

[0071] like Figure 1-14 FIG. 1 shows an embodiment of a switch device of the present invention. The switch device of this embodiment is specifically a circuit breaker.

[0072] like Figure 5-7As shown, the switch apparatus of this embodiment includes an operating mechanism 1234 and at least one contact system. The contact system includes a movable contact assembly 910 and a stationary contact 920 that work together. The operating mechanism 1234 is transmission-connected to the movable contact assembly 910 to drive the movable contact assembly 910 to rotate and close and open with the stationary contact 920. Furthermore, the movable contact assembly 910 includes a supporting shaft 911 and a movable contact 912 disposed on the supporting shaft 911. Furthermore, when the switch apparatus of this embodiment is a multi-phase switch apparatus, that is, when the number of contact systems is ≥ 2, the movable contact assembly 910 of each contact system is driven by the operating mechanism 1234 to synchronously close and open with the corresponding stationary contact 920. The supporting shaft 911 of each movable contact assembly 910 is of either an integral or split structure. In the switch apparatus of this embodiment, each supporting shaft 911 is preferably of an integral structure.

[0073] Furthermore, the switching device of this embodiment further includes a short-circuit protection mechanism (not shown) and an overload protection mechanism (not shown). The short-circuit protection mechanism or the overload protection mechanism is used to drive the operating mechanism 1234 to trip when a short-circuit fault or an overload fault occurs in the circuit of the switching device of this embodiment. The operating mechanism 1234 drives the movable contact assembly 910 to rotate and disconnect from the static contact 920. Furthermore, the short-circuit protection mechanism and the overload protection mechanism are integrated or split structures. Both the short-circuit protection mechanism and the overload protection mechanism can be implemented using existing technologies and will not be described in detail here.

[0074] Furthermore, the switch electrical appliance of this embodiment has four working states, namely, the electrical appliance closing state, the electrical appliance opening state, the electrical appliance tripping state and the electrical appliance re-tripping state. The electrical appliance closing state, the electrical appliance opening state and the electrical appliance tripping state are three stable states, and the electrical appliance re-tripping state is a transitional state. The operating mechanism 1234 also has four working states, namely, the mechanism closing state, the mechanism opening state, the mechanism tripping state and the mechanism re-tripping state, that is, the operating mechanism 1234 is in the corresponding state when the switch electrical appliance is in the electrical appliance closing state, the electrical appliance opening state, the electrical appliance tripping state and the electrical appliance re-tripping state respectively, and the corresponding mechanism re-tripping state is also a transitional state; when the switch electrical appliance is in the electrical appliance closing state, the operating mechanism 1234 performs the opening operation to switch the switch electrical appliance to the electrical appliance opening state, and the operating mechanism 1234 performs the opening operation to switch the switch electrical appliance to the electrical appliance opening state. Mechanism 1234 also switches to the mechanism-off state; when the switch appliance is in the appliance-off state, the operating mechanism 1234 performs a closing operation to switch the switch appliance to the appliance-on state, and the operating mechanism 1234 also switches to the mechanism-on state; when the switch appliance is in the appliance-on state, after the operating mechanism 1234 trips, the switch appliance switches to the appliance-tripped state, and the operating mechanism 1234 also switches to the mechanism-tripped state; when the switch appliance is in the appliance-tripped state, an external operating force (such as the manual operating force of the operator) drives the operating mechanism 1234 to perform a re-tripping operation, the switch appliance switches to the appliance-re-tripping state, and the operating mechanism 1234 also switches to the mechanism-re-tripping state. After the external operating force is removed, the switch appliance automatically switches to the appliance-off state and the operating mechanism 1234 automatically switches to the mechanism-off state.

[0075] Furthermore, the switching device of this embodiment also includes a housing structure for accommodating the operating mechanism 1234 and the contact system.

[0076] The present utility model further discloses an operating system, which includes the operating mechanism 1234 and the moving contact assembly 910 .

[0077] like Figure 1-14 FIG. 1 shows an embodiment of the operating mechanism 1234 .

[0078] like Figure 1 As shown, the operating mechanism 1234 of this embodiment has its length direction, width direction and height direction respectively as direction d3, direction d5 and direction d4, and the directions d3, d5 and d4 are perpendicular to each other.

[0079] like Figure 1 、 3The operating mechanism 1234 of the embodiment shown in FIG. 7 comprises a bracket 100, a lock catch 500 and a rocker member 700 rotatably arranged on the bracket 100 respectively, a jumper catch 600 rotatably arranged on the bracket 100 at one end and matched with the lock catch 500 at the other end, an upper connecting rod 810 rotatably connected with the jumper catch 600 at one end and provided with a second shaft 820 at the other end, a main spring 850 connected to the rocker member 700 at one end and to the second shaft 820 at the other end, and a trip drive structure rotatably arranged. The second shaft 820 is also used to be rotatably connected with a movable contact assembly 910 of the switch electric appliance to drive the movable contact assembly 910 to rotate to close and open with a stationary contact 920. The main spring 850 provides energy for the opening and closing operations and the trip operation of the operating mechanism 1234. The main spring 850 is energized before being de-energized when the operating mechanism 1234 performs the closing operation and the opening operation. The main spring 850 is de-energized to drive the operating mechanism 1234 to switch to the trip state when the operating mechanism 1234 trips in the closing state. In the normal state of the operating mechanism 1234 (i.e. the normal state of the switch electric appliance of the embodiment), i.e. in the mechanism closing state, the mechanism opening state, the normal closing operation process or the normal opening operation (non-trip opening process) of the operating mechanism 1234, the jumper catch 600 and the lock catch 500 remain latched and matched, and the lock catch 500 and the trip drive structure remain between the first limiting match. In the mechanism closing state of the operating mechanism 1234, the trip drive structure is driven to rotate by an external force (e.g. the driving force of the short-circuit protection mechanism, the driving force of the overload protection mechanism or the driving force of the tripper), so that the trip drive structure and the lock catch 500 are out of the first limiting match. Then, the jumper catch 600 is rotated under the action of the main spring 850, and the jumper catch 600 drives the lock catch 500 to rotate, so that the jumper catch 600 and the lock catch 500 are out of the latching match, and the lock catch 500 and the trip drive structure establish the second limiting match. In the mechanism trip state of the operating mechanism 1234, when performing the re-latching operation, the operating external force drives the rocker member 700 to rotate, the jumper catch 600 is reset under the drive of the rocker member 700, and the trip drive structure and the lock catch 500 are reset respectively, so that the trip drive structure and the lock catch 500 are out of the second limiting match and establish the first limiting match, and the jumper catch 600 and the lock catch 500 restore and maintain the latching match. The operating mechanism 1234 switches to the mechanism re-latching state. After the operating external force is removed, the operating mechanism 1234 automatically switches to the mechanism opening state.

[0080] Specifically, the trip transmission structure is driven by an external force to rotate in direction d2, releasing the first position-limiting engagement with the latch 500. The tripping member 600, under the action of the main spring 850, rotates in direction d2, driving the latch 500 to rotate in direction d2, releasing the tripping member 610 from the latch 510. When the operating mechanism 1234 is reset from the tripped state, the tripping member 610, the latch 500, and the trip transmission structure each rotate in direction d1 to reset. Directions d1 and d2 are opposite to each other. The rotational axes of the drawbar 200, the latch 500, the tripping member 600, and the movable contact assembly 910, as well as the axis of the second shaft 820, are all parallel to direction d5. The movable contact assembly 910 closes with the corresponding stationary contact 920 by rotating in direction d2, and disconnects from the corresponding stationary contact 920 by rotating in direction d1.

[0081] Further, such as Figure 5-7 In the directions shown, direction d1 is clockwise and direction d2 is counterclockwise.

[0082] Furthermore, the operating mechanism 1234 of this embodiment also includes a reset structure 400, which acts on the locking member 500 and the trip transmission structure respectively. When the operating mechanism 1234 switches from the closed state to the tripped state, the reset structure 400 stores energy. When the operating mechanism 1234 is closed again from the tripped state, the reset structure 400 releases energy to reset the locking member 500 and the trip transmission structure respectively. Furthermore, the reset structure 400 acts on the locking member 500 and the trip transmission structure respectively, causing them to rotate in the same direction.

[0083] Furthermore, the upper connecting rod 810 is rotationally connected to the jumper 600 through the first shaft 840; the operating mechanism 1234 of this embodiment also includes a lower connecting rod 860, one end of the lower connecting rod 860 is rotationally connected to the upper connecting rod 810 through the second shaft 820, and the other end of the lower connecting rod 860 is transmission-connected to the moving contact assembly 910 - specifically, this end of the lower connecting rod 860 is transmission-connected to the supporting shaft 911 of the moving contact assembly 910 through the connecting shaft to drive the moving contact assembly 910 to rotate back and forth and close and disconnect with the static contact 920.

[0084] like Figure 1 、 3 As shown in Figures 9 and 13, the locking member 500 is respectively engaged with the mechanism 100 at both ends of its rotation stroke to limit the rotation angle of the locking member 500.

[0085] Specifically, the lock piece 500 comprises at least one lock piece stroke limiting part 530; at least one group of the support side plates 110 of the support 100 is provided with a stroke limiting hole 114; the lock piece stroke limiting part 530 is movably inserted into the stroke limiting hole 114, and at both ends of the rotating stroke of the lock piece 500, the lock piece stroke limiting part 530 is respectively limited by the sidewalls of the two ends of the stroke limiting hole 114. Further, the lock piece 530 is provided with two lock piece stroke limiting parts 530; two groups of the support side plates 110 of the support 100 are each provided with one stroke limiting hole 114; the two lock piece stroke limiting parts 530 are respectively movably inserted into the two stroke limiting holes 114.

[0086] As shown in Figure 1 , 3 , the support 100 comprises two groups of support side plates 110 arranged in opposite spaces, and a containing space is formed between the two groups of support side plates 110; the lock piece 500, the jump piece 600, the upper connecting rod 810, the second shaft 820, the first shaft 840, the main spring 850, and the lower connecting rod 860 are all arranged in the containing space, that is, between the two groups of support side plates 110.

[0087] Specifically, the lock piece 500 is arranged on the two groups of support side plates 110 by rotating the lock piece rotating shaft 550—specifically, the two ends of the lock piece rotating shaft 500 are arranged on the two groups of support side plates 110, respectively; the jump piece 600 is arranged on the two groups of support side plates 110 by rotating the jump piece rotating shaft 830—specifically, the two ends of the jump piece rotating shaft 830 are arranged on the two groups of support side plates 110, respectively; and the rocker arm 720 of the rocker arm component 700 is arranged on the two groups of support side plates 110. Further, the two groups of support side plates 110 are fixedly connected by a connecting shaft.

[0088] In the operating mechanism 1234 of the embodiment, the support 100 is an independently arranged structure—especially, the support 100 is independent of the shell structure of the switch apparatus. However, it should be noted that the support 100 can also be realized by the shell structure of the switch apparatus, which will not be described in detail here. In addition, in the operating mechanism 1234 of the embodiment, the support side plate 110 is a one-piece structure; however, the support side plate 110 can also be a structure formed by splicing multiple components.

[0089] As shown in Figure 1 , 3 -7, the rocker arm component 700 comprises a rocker arm 720 arranged on the support 100 and a handle 710 arranged on the rocker arm 720, and an external operating force drives the rocker arm 720 to rotate through the handle 710, thereby driving the operating mechanism 1234 to switch between the mechanism closing state and the mechanism opening state and between the mechanism tripping state and the mechanism reclosing state.

[0090] Specifically, as shown in Figure 1 , 3 , 11-13, the rocker arm 720 is rotatably arranged on the two groups of bracket side plates 110 in the following manner: the rocker arm 720 comprises a rocker arm leg 721 and a rocker arm beam 722, the two rocker arm legs 721 are oppositely arranged along the rotation axis of the rocker arm 720, one end of each of the two rocker arm legs 721 is connected to the rocker arm beam 722 by bending, and the rocker arm beam 722 is further used to connect to the handle 710 of the rocker arm component 700; the bracket side plate 110 comprises a rotation limiting structure 11123 which is in one-to-one cooperation with the rocker arm leg 721, the rotation limiting structure 11123 comprises a rocker arm shaft groove 111, a first rocker arm stop 112 and a second rocker arm stop 113, the first rocker arm stop 112 comprises a first stop groove, the second rocker arm stop 113 comprises a second stop groove, the first stop groove and the second stop groove are both U-shaped grooves, the openings of the U-shaped structures of the first stop groove and the second stop groove are oppositely arranged along the rotation axis of the rocker arm 720, i.e., they are oppositely arranged along the rotation axis of the rocker arm 720, the other end of the rocker arm leg 721 is rotatably arranged in the rocker arm shaft groove 111 by penetrating the corresponding first stop groove and the second stop groove, and the bottom walls of the U-shaped structures of the first stop groove and the second stop groove are respectively arranged on the two sides of the corresponding rocker arm leg 721 along the rotation axis of the rocker arm 720 to limit the movement of the rocker arm leg 721 along the rotation axis of the rocker arm 720. Further, the rocker arm 720 is in limiting cooperation with the bracket side plate 110 at both ends of the swing stroke of the rocker arm 720, thereby limiting the maximum swing angle of the rocker arm 720.

[0091] As another embodiment of the rocker arm 720 rotatably arranged on the two groups of bracket side plates 110, the two rocker arm legs 721 of the rocker arm 720 are respectively rotatably connected to the two groups of bracket side plates 110 by a rocker arm shaft. It should be pointed out that those skilled in the art can make other modifications by using conventional technical means in the art, which shall fall within the protection scope of the present utility model.

[0092] Specifically, as shown in Figure 5-7 , one end of the main spring 850 is connected to the rocker arm beam 722 of the rocker arm 720 and the other end is connected to the second shaft 820.

[0093] As shown in Figure 5-6 , the rocker arm component 700 has a rocker arm closing position, a rocker arm tripping position, a rocker arm opening position and a rocker arm reclosing position arranged in sequence along the rotation direction of the rocker arm component 700, and the rocker arm closing position, the rocker arm tripping position and the rocker arm opening position correspond to the mechanism closing state, the mechanism tripping state and the mechanism opening state of the operating mechanism 1234 of the present embodiment, respectively.

[0094] As shown in Figure 6-7As shown, the operating mechanism 1234 of the present embodiment is in the mechanism tripping state or the mechanism tripping state, and the jump buckle 600 is limited with the rocker member 700; the operating mechanism 1234 of the present embodiment is in the mechanism tripping state, and the operating external force drives the rocker member 700 to rotate to the rocker relocking position, the rocker member 700 drives the jump buckle 600 to reset and restore the snap buckle with the lock buckle 500, and after the operating external force is removed, the rocker member 700 is automatically rotated from the rocker relocking position to the rocker tripping position under the action of the main spring 850, and the operating mechanism 1234 is finally switched to the mechanism tripping state.

[0095] Specifically, the rocker 720 of the rocker member 700 further comprises a jump buckle reset driving part 724; the jump buckle 600 further comprises a jump buckle blocking part 660; when the operating mechanism 1234 of the present embodiment is in the mechanism tripping state and performs the relocking operation, the jump buckle reset driving part 724 presses the jump buckle blocking part 660 to make the jump buckle 600 rotate to the relocking position.

[0096] As shown in Figure 3 As shown in FIG. 7, it is an implementation of the upper connecting rod 810: the upper connecting rod 810 comprises two upper connecting rod side plates 811 which are opposite in direction d5 and located on both sides of the jump buckle 600, one end of the two upper connecting rod side plates 811 is connected with the jump buckle 600 through the first shaft 840, and the other end is connected with the lower connecting rod 860 through the second shaft 820, and the lower connecting rod 860 is located between the two upper connecting rod side plates 811.

[0097] As shown in Figure 1 、 3 As shown in FIG. 7, it is an embodiment of the tripping driving structure.

[0098] The trip transmission structure of the embodiment comprises a traction rod 200 arranged to rotate and a cooperating piece 300 arranged on the traction rod 200 to rotate synchronously with the traction rod 200 around the rotation axis of the traction rod 200; the operating mechanism 1234 is in a normal state (i.e. the switch device of the embodiment is in a normal state), i.e. the operating mechanism 1234 is in a mechanism closed state, a mechanism opened state, a normal closing operation process or a normal opening operation (non-trip opening process) process, the trip piece 600 and the lock piece 500 remain in a snap-fit and the lock piece 500 remains in a first limiting fit with the cooperating piece 300; the operating mechanism 1234 of the embodiment is in a mechanism closed state, the traction rod 200 is driven to rotate by a trip external force (e.g. the trip external force is a driving force from the short-circuit protection mechanism and the overload protection mechanism), the cooperating piece 300 is released from the first limiting fit with the lock piece 500, the trip piece 600 is rotated under the action of the main spring 850 and the trip piece 600 drives the lock piece 500 to rotate, the trip piece 600 is released from the snap-fit with the lock piece 500 and the lock piece 500 is established in a second limiting fit with the cooperating piece 300, and the lock piece 500 and the cooperating piece 300 remain in the second limiting fit; when the operating mechanism 1234 is in a mechanism tripped state, the operating external force drives the rocker member 700 to rotate, the trip piece 600 is rotated and reset under the drive of the rocker member 700, the lock piece 500 is rotated and reset, the traction rod 200 is rotated to drive the cooperating piece 300 to reset, finally the trip piece 600 and the lock piece 500 are restored to the snap-fit and the lock piece 500 is released from the second limiting fit with the cooperating piece 300 and established in the first limiting fit with the cooperating piece 300, the operating mechanism 1234 is switched to a mechanism reset state, and after the operating external force is removed, the operating mechanism 1234 is automatically switched to a mechanism opened state.

[0099] Specifically, the operating mechanism 1234 of the embodiment is in a mechanism closed state, the traction rod 200 is driven to rotate in the direction d2 by a trip external force, the cooperating piece 300 is released from the first limiting fit with the lock piece 500, the trip piece 600 is rotated in the direction d1 under the action of the main spring 850 and the trip piece 600 drives the lock piece 500 to rotate in the direction d1, the trip piece 600 is released from the snap-fit with the lock piece 500; when the operating mechanism 1234 performs a reset operation, the operating external force drives the rocker member 700 to rotate in the direction d2, the rocker member 700 drives the trip piece 600 to rotate in the direction d2, the lock piece 500 is rotated and reset in the direction d2, and the traction rod 200 is rotated in the direction d2 to drive the cooperating piece 300 to reset.

[0100] As Figure 1 , 3As shown in FIG. 7, in the operating mechanism 1234 of the present embodiment, the locking member 500 and the pulling rod 200 have a tendency to rotate in the same direction (specifically, direction d2) under the action of the reset structure 400; when the operating mechanism 1234 is in the tripping state and performs the reclosing operation, the locking member 500 and the pulling rod 200 rotate in direction d2 respectively under the action of the reset structure 400 and are reset.

[0101] Specifically, the reset structure 400 is a torsion spring, which is sleeved on a spring shaft (the spring shaft is realized by a locking rotating shaft 550 of the operating mechanism 1234, which is advantageous to simplify the structure of the operating mechanism 1234 of the present embodiment, and the locking rotating shaft 550 will be described in detail later), the spring shaft is fixedly arranged on the bracket 100, and a group of spring arms of the torsion spring cooperates with the locking member 500 and another group of spring arms cooperates with the pulling rod 200. Further, the reset structure 400 is a double torsion spring, which includes two single torsion springs 410 arranged symmetrically side by side along the rotating axis of the locking member 500 and a spring connecting rod 420, the two single torsion springs 410 are respectively a first single torsion spring and a second single torsion spring, each single torsion spring 410 includes a helical body 411 and a first spring arm 412 and a second spring arm 413 connected to the helical body 410 respectively, one end of the first spring arms 412 of the two single torsion springs are connected through the spring connecting rod 420, the second spring arms 413 include a spring arm connecting section 414 and a spring arm assembling section 415, one end of the spring arm connecting section is connected to the corresponding helical body 411 and the other end is connected to the spring arm assembling section 415 through bending; the two first spring arms 412 and the spring connecting rod 420 are used as a whole to cooperate with the pulling rod 200, and the spring arm assembling sections 415 of the two second spring arms 413 are used to cooperate with the two locking member mounting arms 520 of the locking member 500. Further, the extension direction of the spring arm assembling section 415 is arranged parallel to the rotating axis of the locking member 500.

[0102] As another embodiment of the tripping transmission structure, the tripping transmission structure includes a reclosing member rotatably arranged on the bracket 100 and having a rotating axis parallel to direction d5; in the normal state of the operating mechanism, the locking member 500 and the reclosing member have a first limiting cooperation; in the tripping state of the operating mechanism, the locking member 500 and the reclosing member have a second limiting cooperation; the reclosing member is driven to rotate by an external force, so that the reclosing member and the locking member 500 are out of the first limiting cooperation, and then the locking member 500 and the tripping member 600 are out of the buckling cooperation and the locking member 500 and the reclosing member establish the second limiting cooperation; the tripping transmission structure further includes the pulling rod 200, which is used to transmit a tripping force from the short-circuit protection mechanism, the overload protection mechanism or the tripping device to the reclosing member to drive it to rotate; the present embodiment can be realized by the prior art, and will not be described in detail here.

[0103] As shown in FIG. 7, Figure 1 ,3 An improved point of the switch electric appliance of the embodiment is shown in

[0104] The locking member 500 is rotatably arranged on the bracket 100 at one end and is provided with a locking member matching part 540 at the other end; the operating mechanism 1234 keeps the first limiting cooperation between the locking member matching part 540 and the matching part 300 in the normal state; the traction rod 200 is driven to rotate by the tripping external force, the first limiting cooperation between the matching part 300 and the locking member matching part 540 is released, the jump member 600 is driven to rotate by the main spring 850 and the jump member 600 drives the locking member 500 to rotate, the jump member 600 and the locking member 500 are released from the snap cooperation and the second limiting cooperation is established between the locking member matching part 540 and the matching part 300, the operating mechanism 1234 keeps the second limiting cooperation between the locking member matching part 540 and the matching part 300 in the tripping state. Further, the traction rod 200 is driven to rotate along the direction d1 by the tripping external force, the first limiting cooperation between the matching part 300 and the locking member matching part 540 is released, the jump member 600 is driven to rotate along the direction d1 by the main spring 850 and the jump member 600 drives the locking member 500 to rotate along the direction d1.

[0105] The operating mechanism 1234 of the embodiment cooperates the locking member 500 with the matching part 300, compared with the traditional operating mechanism, the relocking and other components are omitted, the structure of the operating mechanism 1234 is simplified and the reliability and stability of the operating mechanism 1234 are ensured, the material cost and labor cost are saved.

[0106] Specifically, as shown in Figure 5-6 , the operating mechanism 1234 keeps the matching part 300 on one side of the locking member matching part 540 along the direction d3 in the normal state; as shown in Figure 7 , the operating mechanism 1234 keeps the matching part 300 on one side of the locking member matching part 540 along the direction d4 in the mechanism tripping state; the direction d3 and the direction d4 are perpendicular to each other. Further, as shown in Figure 1 , 3 , 10, the matching part 300 is a cylindrical rod arranged parallel to the rotation axis of the traction rod 200, the rotation axis of the traction rod 200 is parallel to the direction d5; as shown in Figure 9As shown, the lock fitting part 540 includes a fitting part first limit surface 541 and a fitting part second limit surface 542, the cylindrical rod is abutted on one side of the fitting part first limit surface 541 along the direction d3 to make the lock fitting part 540 and the fitting part 300 establish a first limit cooperation, the cylindrical rod is abutted on one side of the fitting part second limit surface 542 along the direction d4 to make the lock fitting part 540 and the fitting part 300 establish a second limit cooperation. Further, the cylindrical rod is a cylindrical rod; the fitting part first limit surface 541 and the fitting part second limit surface 542 are both planes, and one end of the fitting part first limit surface 541 and the fitting part second limit surface 542 is preferably connected through an arc surface, facilitating the cylindrical rod to move from the state of cooperation with the fitting part first limit surface 541 to the state of cooperation with the fitting part second limit surface 542. Further, the fitting part 300 and the traction rod 200 are an integral structure or a split structure.

[0107] As other embodiments of the fitting part 300, the fitting part 300 can also be a cylindrical protrusion extending along the direction d5; and / or, the cylindrical rod is a semi-cylindrical rod, a variable cylindrical rod, etc., as long as it can realize the first limit cooperation, the second limit cooperation, and the conversion of the first limit cooperation and the second limit cooperation of the fitting part 300 and the lock fitting part 540.

[0108] As shown in Figure 1 , 3 , 10, in this embodiment, the fitting part 300 and the traction rod 200 are a split structure.

[0109] Specifically, the traction rod 200 includes a traction rod main body 210 and a fitting part mounting part 220, the traction rod 200 is rotationally arranged through the traction rod main body 210, two fitting part mounting parts 220 are oppositely and spaced apart on the traction rod main body 210 along the rotation axis direction (direction d5) of the traction rod 200, and the two ends of the cylindrical rod are respectively fixedly arranged on the two fitting part mounting parts 220. Further, each of the two fitting part mounting parts 220 is provided with a fitting part assembly hole, and the two ends of the fitting part 300 are respectively inserted into the two fitting part assembly holes; the fitting part mounting part 220 is perpendicular to the rotation axis of the traction rod 200.

[0110] As shown in Figure 1 , 3 -7, 10 and 13, the traction rod 200 is rotationally arranged on the bracket 100.

[0111] Specifically, the drawbar 200 includes two sets of drawbar assembly holes 211 disposed on the drawbar body 210, the two sets of drawbar assembly holes 211 being spaced apart along the axial direction of the drawbar body 210. The bracket side plate 110 of the bracket 100 also includes a drawbar mounting portion 116, which protrudes toward the side of the drawbar body 210. When the drawbar 200 is assembled with the bracket side plate 110, the drawbar mounting portion 116 is inserted into the corresponding drawbar assembly hole 211, thereby being rotationally connected to the drawbar body 210. Furthermore, the sidewalls of the drawbar assembly hole 211 are provided with an axial hole, and the drawbar mounting portion 116 is provided with an axial hole. The rotating shaft of the drawbar 200 passes through the axial hole of the drawbar mounting portion 116 and the axial hole on the sidewall of the drawbar assembly hole 211, respectively, thereby rotationally connecting the drawbar 200 to the bracket side plate 110. Furthermore, the two sets of traction rod assembly holes 211 are located on both sides of the two sets of mating component mounting portions 220 of the traction rod 200 in the rotational axis of the traction rod body 210. The traction rod 200 and the bracket 100 are rotatably connected in this manner, which improves the compactness of the structural layout and reduces the installation space requirement.

[0112] As other embodiments in which the traction rod 200 is rotatably arranged on the bracket 100, the traction rod 200 is provided with a traction rod connecting arm, one end of the traction rod connecting arm is rotatably connected to the traction rod main body 210 and the other end is rotatably connected to the traction rod mounting portion 116; alternatively, the bracket 100 is not provided with the traction rod mounting portion 116, but a traction rod connecting hole is directly provided, the traction rod connecting arm and the bracket side plate 110 of the bracket 100 are stacked along the rotation axis of the traction rod 200, and the traction rod connecting arm is rotatably connected to the bracket 100 through the traction rod connecting hole.

[0113] like Figure 1-2 As shown, in the normal state of the operating mechanism 1234 of this embodiment, the traction rod 200 and the bracket 100 are limited and matched to prevent the traction rod 200 from further rotating under the action of the reset structure 400, so that the matching piece 300 and the locking piece matching portion 540 of the locking piece 500 establish a reliable second limited match.

[0114] Specifically, the traction rod 200 further comprises at least one set of traction rod limiting portions 230 arranged on the traction rod body 210; at least one set of support side plates 110 of the mechanism 100 comprises a support limiting portion 115; the operating mechanism 1234 of the embodiment is in a normal state, the traction rod limiting portion 230 is in abutting limiting cooperation with the support limiting portion 115, so as to prevent the traction rod 200 from further rotating under the action of the reset structure 400. Further, the traction rod 200 is provided with two sets of traction rod limiting portions 230, the two sets of traction rod limiting portions 230 are arranged in a spaced manner along the rotation axis of the traction rod 200; the two sets of support side plates 110 are each provided with a support limiting portion 115, and the two sets of support limiting portions 115 are in limiting cooperation with the two sets of traction rod limiting portions 230, respectively.

[0115] As shown in Figure 1 , 3 -7, 9, the lock catch 500 further comprises a lock catch main plate 510 and a lock catch mounting arm 520, the lock catch main plate 510 is used for snap cooperation with the jump catch 600, a pair of side edges of the lock catch main plate 510 are respectively connected with two sets of lock catch mounting arms 520, the two sets of lock catch mounting arms 520 are arranged opposite to each other along the rotation axis of the lock catch 500, one end of each of the two sets of lock catch mounting arms 520 is rotationally arranged on the support 100, and the other end of at least one lock catch mounting arm 520 serves as a lock catch cooperation portion 540.

[0116] Specifically, the two sets of lock catch mounting arms 520 are respectively rotationally arranged on the two sets of support side plates 110 of the support 100 through a lock catch rotation shaft 550. The lock catch main plate 510 comprises a main plate cooperation end 511, and the main plate cooperation end 511 is located between the two sets of lock catch mounting arms 520. One end of each of the two sets of lock catch mounting arms 520 is rotationally arranged on the support 100, and the other end of each of the two sets of lock catch mounting arms 520 serves as a lock catch cooperation portion 540. The two sets of lock catch mounting arms 520 are in cooperation with the cooperation piece 300, which is conducive to improving the reliability and stability of cooperation. One end of each of the two sets of lock catch stroke limiting portions 530 of the lock catch 500 is respectively connected with the two sets of lock catch mounting arms 520. The lock catch mounting arm 520 is provided with a lock catch spring hole 522 in which the spring arm assembly segment 415 of the reset structure 400 is inserted. The lock catch mounting arm 520 is further provided with a lock catch shaft hole 521 through which the lock catch rotation shaft 550 passes.

[0117] As shown in Figure 4-9 Another improvement point of the switch apparatus of the embodiment is that:

[0118] The jump catch 600 and the lock catch 500 always maintain limiting cooperation, so as to facilitate the jump catch 600 and the lock catch 500 to restore snap cooperation.

[0119] Specifically, the jump catch 600 and the main plate cooperation end 511 of the lock catch 500 always abut against each other.

[0120] Further, the trip member 600 comprises a trip member clasp surface 610 and a trip member mating surface 620; the operating mechanism 1234 is in the normal state, the trip member clasp surface 610 abuts against the main plate mating end 511 to realize the clasp cooperation between the trip member 600 and the lock member 500; the operating mechanism 1234 is in the tripping state, the trip member mating surface 620 abuts against the main plate mating end 511.

[0121] Further, the trip member clasp surface 610 is parallel to the rotation axis of the trip member 600.

[0122] Further, the trip member mating surface 620 is parallel to the rotation axis of the trip member 600. Further, the trip member mating surface 620 is a circular arc surface, the center of which coincides with the rotation center of the trip member 600.

[0123] Further, the trip member clasp surface 610 has a clasp surface far end which is away from the trip member mating surface 620, and a clasp surface near end which is connected with the trip member mating surface 620; from the clasp surface far end to the clasp surface near end, the distance between the trip member clasp surface 610 and the rotation axis of the trip member 600 gradually increases. Further, the trip member clasp surface 610 is a plane which is parallel to the rotation axis of the trip member 600.

[0124] As other embodiments of the trip member clasp surface 610, the trip member clasp surface 610 is a spiral surface, from the clasp surface far end to the clasp surface near end, the curvature gradually decreases.

[0125] The working process of the operating mechanism 1234 of the present embodiment will be described below:

[0126] As shown in Figure 4-6 , in the mechanism open state and the mechanism closed state, the cooperating member 300 is located on one side of the lock member mating portion 540 along the direction d3, and the cooperating member 300 and the lock member mating portion 540 keep the first limiting cooperation; the operating mechanism 1234 of the present embodiment switches between the mechanism open state and the mechanism closed state through normal closing operation and opening operation, and the cooperating member 300 and the lock member mating portion 540 keep the first limiting cooperation. In combination with Figure 5 and 7As shown, in the closing state of the switch device, when a short circuit or overload fault occurs in the circuit in which the switch device is located, the traction rod 200 is driven by the tripping external force to rotate in the direction d2 (counterclockwise) to disengage the cooperating member 300 from the first limiting cooperation of the locking member cooperation part 540, the main spring 850 drives the jump buckle member 600 to rotate in the direction d2 (counterclockwise), and the jump buckle member 600 simultaneously drives the locking member 500 to rotate in the direction d2 (counterclockwise) - that is, the jump buckle member 600 and the locking member 500 rotate in the same direction under the action of the main spring 850, so that the jump buckle member 600 and the locking member 500 are disengaged from the snap cooperation and the locking member cooperation part 540 and the cooperating member 300 are established and maintained in the second limiting cooperation, and the switch device of the embodiment is switched from Figure 5 the closing state of the device shown in Figure 7 to the tripping state of the device shown in Figure 7 As shown, in the tripping state of the device, the operating mechanism 1234 drives the rocker arm member 700 to rotate from the rocker arm tripping position to the rocker arm re-engaging position, the rocker arm member 700 simultaneously drives the jump buckle member 600 to rotate in the direction d1 (clockwise) to the re-engaging position to make the jump buckle surface 610 cooperate with the locking member 500, the reset structure 400 simultaneously drives the locking member 500 and the traction rod 200 to rotate in the direction d1 (clockwise), so that the locking member cooperation part 540 and the cooperating member 300 are disengaged from the second limiting cooperation and the cooperating member 300 moves to the side of the locking member cooperation part 540 in the direction d3, and the operating mechanism 1234 is switched from the tripping state to the re-engaging state, and after the operating external force is removed, the operating mechanism 1234 is automatically switched from the re-engaging state to the opening state.

[0127] As shown in Figure 1 , 3 Fig. 7, it is a layout of the switch device of the embodiment:

[0128] In the operating mechanism 1234, the two groups of support side plates 110 of the support 100 are oppositely arranged along the direction d5, the jump buckle member 600, the lock buckle member 500, the upper connecting rod 810, the lower connecting rod 860, the first shaft 840, the second shaft 820 and the main spring 850 are arranged in the accommodating space of the support 100, the jump buckle member 600, the lock buckle member 500 and the tripping transmission structure are sequentially arranged along the direction d3 (specifically, the jump buckle member 600, the lock buckle member 500 and the traction rod 200 are sequentially arranged along the direction d3, and the matching member 300 is located between the jump buckle member 600 and the traction rod 200 along the direction d3), the rocker arm cross beam 722 of the rocker arm 720 and the second shaft 820 are respectively located on the two sides of the jump buckle member 600 along the direction d4, the first shaft 840 is located between the two ends of the main spring 850 and between the rocker arm cross beam 722 and the second shaft 820 along the direction d4, the second shaft 820, the lower connecting rod 860 and the movable contact assembly 910 are located on one side of the jump buckle member 600 along the direction d4, and the rotation axes of the jump buckle member 600, the lock buckle member 500, the rocker arm 720 and the traction rod 200 are all parallel to the direction d5; in the projection of the operating mechanism 1234 perpendicular to the direction d5, the rotation axis of the lock buckle member 500, the rotation axis of the traction rod 200 and the axis of the matching member 300 are respectively located at three vertices of a triangle, and the rotation axes of the first shaft 840, the jump buckle shaft 830 and the movable contact assembly 910 are located at three vertices of a triangle.

[0129] As shown in Figure 6-7 The third improvement of the switch device of the embodiment is that:

[0130] The operating mechanism 1234 in the mechanism opening state and the mechanism tripping state, the second shaft 820 is limited with the trip member 600 to prevent the upper connecting rod 810 rotating relative to the trip member 600 along the direction d2. The second shaft 820 drives the movable contact assembly 910 to rotate to the movable contact opening position when the operating mechanism 1234 is switched from the mechanism closing state to the mechanism opening state, so that the distance between the movable contact assembly 910 and the corresponding static contact 920 is L1. In other words, when the operating mechanism 1234 is normally opened, that is, when the operating external force drives the operating mechanism 1234 to switch from the mechanism closing state to the mechanism opening state through the rocker member 720, the second shaft 820 is used to drive the movable contact assembly 910 to rotate to the movable contact opening position, so that the distance between the movable contact assembly 910 and the static contact 920 is L2. The second shaft 820 drives the movable contact assembly 910 to rotate to the movable contact tripping position when the operating mechanism 1234 is switched from the mechanism closing state to the mechanism tripping state, so that the distance between the movable contact assembly 910 and the corresponding static contact 920 is L2, L2>L1. In other words, when the operating mechanism 1234 is tripped and opened, the tripping external force drives the traction rod 200 to rotate, so that the operating mechanism 1234 is switched from the mechanism closing state to the mechanism tripping state, and the second shaft 810 is used to drive the movable contact assembly 910 to rotate to the movable contact tripping position, so that the distance between the movable contact assembly 910 and the static contact 920 is L1, L2>L1. Further, L2≥1.5*L1.

[0131] In existing switching electrical appliances, the moving contact assembly and the housing structure of the switching electrical appliance are limited and matched so that the moving contact assembly stops at the disconnected position when the moving contact assembly is disconnected from the static contact. However, this structure makes the opening distance of the moving contact assembly and the static contact the same when the switching electrical appliance is normally opened and when breaking the fault current (short circuit or overload current). If the opening distance is designed to be large, the operating life of the switching electrical appliance is limited. If the opening distance is designed to be small, although the operating life of the switching electrical appliance is guaranteed, the breaking capacity of the switching electrical appliance is limited. In the switching electrical appliance of this embodiment, the second shaft 820 and the tripping member 600 are limited in cooperation in the electrical appliance opening state and the electrical appliance tripping state. The position of the tripping member 600 remains basically unchanged when the switching electrical appliance is normally opening. When the switching electrical appliance is tripped and opening, the tripping member 600 rotates under the action of the main spring 650, thereby driving the second shaft 820 to move, so that the switching electrical appliance has different opening distances between the moving contact assembly 910 and the static contact 920 when the switching electrical appliance is normally opening and when the switching electrical appliance is tripped and opening - the opening distance between the moving contact assembly 910 and the static contact 920 of the switching electrical appliance in the electrical appliance opening state is smaller than the opening distance between the moving contact assembly 910 and the static contact 920 of the switching electrical appliance in the electrical appliance tripping state, thereby improving the ability of the switching electrical appliance to interrupt fault current; the switching electrical appliance of this embodiment only makes the upper connecting rod 810, the lower connecting rod 860 and the main spring 850 of the operating mechanism 1234 perform a larger action stroke when interrupting the fault current, thereby reducing damage to the structure of the operating mechanism 1234 and extending the service life of the operating mechanism 1234.

[0132] Specifically, the tripping member 600 further includes a tripping member limiting surface 630. When the operating mechanism 1234 is in the mechanism-off state and the mechanism-tripped state, the second shaft 820 abuts against the tripping member limiting surface 630 to prevent the upper connecting rod 800 from rotating relative to the tripping member 600 along the direction d2. When the operating mechanism 1234 is normally off, that is, when the operating mechanism 1234 is switched from the closed state to the open state, the position of the tripping member 600 remains substantially unchanged, the second shaft 820 abuts against the tripping member limiting surface 630, and the second shaft 820 is located in the second-axis tripping position; when the operating mechanism 1234 is tripped and opened—that is, when the operating mechanism 1234 switches from the closed state to the tripped state—the tripping member 600 and the lock member 500 are released from the latching engagement, and the tripping member 600 rotates under the action of the main spring 850. The position where the second axis 820 and the tripping member limiting surface 630 abut against each other is the second-axis tripping position. The second-axis tripping position moves relative to the second-axis opening position, thereby driving the moving contact assembly 910 to rotate a greater angle. Furthermore, the tripping member latching surface 610, the tripping member mating surface 620, and the tripping member limiting surface 630 of the tripping member 600 are sequentially arranged and connected along the rotation direction of the tripping member 600, and the tripping member limiting surface 630 is also parallel to the direction d5.

[0133] like Figure 4 、 8As shown, one embodiment of the jump buckle 600 is shown:

[0134] The jump buckle 600 of the embodiment is a plate structure as a whole, one end of the opposite ends is a jump buckle pivot end and the end is rotatably arranged on the support 100 through the jump buckle rotating shaft 830, the other end is a jump buckle buckle end and the end is provided with a jump buckle buckle surface 610 and a jump buckle matching surface 620; the jump buckle blocking part 660 and the jump buckle limiting surface 630 are located between the jump buckle pivot end and the jump buckle buckle end, and the jump buckle blocking part 660 and the jump buckle limiting surface 630 are located on the opposite ends of the jump buckle 600 respectively. Further, the jump buckle 600 further comprises a jump buckle shaft hole 640 and a jump buckle connecting hole 650, the jump buckle shaft hole 640 is used for inserting the jump buckle rotating shaft 830 therein, and the jump buckle connecting hole 650 is used for inserting the first shaft 840 therein.

[0135] Further, the jump buckle 600 is in the shape of an axe as a whole, comprising a large plate part and a small plate part connected with each other, the jump buckle 600 is pivotally arranged through the small plate part, the small plate part is provided with the jump buckle shaft hole 640, the jump buckle buckle surface 610 and the jump buckle matching surface 620 are arranged at the blade edge of the axe-shaped structure of the jump buckle 600, the jump buckle limiting surface 630 is arranged at the side edge of the large plate part, one end of the jump buckle limiting surface 630 is connected with the jump buckle matching surface 620 and the other end is connected with the small plate part, the bending connection part of the jump buckle matching surface 620 and the jump buckle limiting surface 630 is located at one end of the blade edge of the axe-shaped structure of the jump buckle 600, and the jump buckle blocking part 660 is located at the other end of the blade edge of the axe-shaped structure of the jump buckle 600; the small plate part and the two ends of the blade edge of the axe-shaped structure of the jump buckle 600 are located at three vertices of a triangle.

[0136] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used in use, and are only for the convenience of description, and cannot be understood as indicating that the devices or elements referred to must have a specific orientation, therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for distinction, and cannot be understood as indicating relative importance.

[0137] The above is a further detailed description of the present application in combination with a specific preferred embodiment, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be regarded as falling within the protection scope of the present application.

Claims

1. An operating mechanism, comprising a bracket (100), a locking member (500) and a rocker arm component (700) rotatably arranged on the bracket (100), a tripping member (600) rotatably arranged on the bracket (100) at one end and cooperating with the locking member (500) at the other end, an upper connecting rod (810) rotatably connected to the middle part of the tripping member (600) at one end and provided with a second shaft (820) at the other end, a main spring (850) connected to the rocker arm component (700) at one end and connected to the second shaft (820) at the other end, and a rotatably arranged traction rod (200); the second shaft (820) is also used for transmission connection with a moving contact assembly (910) of a switch electrical appliance; the main spring (850) provides energy for opening, closing and tripping operations of the operating mechanism; and is characterized in that: The operating mechanism further comprises a matching piece (300) arranged on the traction rod (200) and rotating synchronously with the traction rod (200) around the rotation axis of the traction rod (200); One end of the locking member (500) is rotatably arranged and the other end is provided with a locking member matching portion (540); When the operating mechanism is in a normal state, the jumper (600) and the locker (500) maintain a snap fit, and the locker fitting portion (540) and the fitting member (300) maintain a first position-limiting fit. The traction rod (200) is driven to rotate by the external force of the tripping, driving the matching piece (300) and the locking piece matching portion (540) to release the first limit fit, and then the jumper (600) rotates under the action of the main spring (850) and the jumper (600) drives the locking piece (500) to rotate, so that the jumper (600) and the locking piece (500) are released from the snap fit and a second limit fit is established between the locking piece matching portion (540) and the matching piece (300).

2. The operating mechanism according to claim 1, characterized in that: When the operating mechanism is in a normal state, the mating piece (300) is located on one side of the locking piece mating portion (540) along direction d3; when the operating mechanism is in a mechanism-disengaged state, the mating piece (300) is located on one side of the locking piece mating portion (540) along direction d4; the directions d3 and d4 are perpendicular to each other.

3. The operating mechanism according to claim 2, characterized in that: The matching piece (300) is a columnar rod arranged parallel to the rotation axis of the traction rod (200), the rotation axes of the locking piece (500) and the traction rod (200) are parallel to the direction d5, and the directions d3, d4 and d5 are perpendicular to each other; the locking piece matching part (540) includes a first limiting surface (541) of the matching part and a second limiting surface (542) of the matching part, the columnar rod abuts against the first limiting surface (541) of the matching part along the direction d3, so that the locking piece matching part (540) and the matching piece (300) establish a first limiting fit, and the columnar rod abuts against the second limiting surface (542) of the matching part along the direction d4, so that the locking piece matching part (540) and the matching piece (300) establish a second limiting fit.

4. The operating mechanism according to claim 3, characterized in that: The traction rod (200) comprises a traction rod main body (210) and a fitting installation portion (220); the traction rod (200) is rotatably arranged by the traction rod main body (210); the two fitting installation portions (220) are relatively spaced apart along the rotation axis of the traction rod (200) and are both arranged on the traction rod main body (210); the two ends of the columnar rod are respectively fixedly arranged on the two fitting installation portions (220); the columnar rod is a cylindrical rod; the traction rod main body (210) comprises two groups of traction rod assembly holes (211) sequentially arranged along the rotation axis of the traction rod (200); the bracket (100) comprises two bracket side plates (110) arranged opposite to each other, each bracket side plate (110) being provided with a traction rod installation portion (116); the two traction rod installation portions (116) are respectively inserted into the two groups of traction rod assembly holes (211) and are respectively rotatably connected to the traction rod main body (210).

5. The operating mechanism according to claim 3, characterized in that: On the projection of the operating mechanism perpendicular to the direction d5, the axis of the fitting part (300), the rotation axis of the locking part (500) and the rotation axis of the traction rod (200) are respectively located at the three vertices of a triangle.

6. The operating mechanism according to claim 1, characterized in that: The locking member (500) includes a locking main plate (510) and a locking member mounting arm (520), wherein the locking main plate (510) is used for engaging with the jumper (600), and a pair of side edges of the locking main plate (510) are respectively connected to two groups of locking member mounting arms (520) by bending, and the two groups of locking member mounting arms (520) are arranged opposite to each other along the rotation axis of the locking member (500), and one end of the two groups of locking member mounting arms (520) is respectively rotatably arranged on the bracket (100), and the other end of at least one locking member mounting arm (520) serves as a locking member matching portion (540).

7. The operating mechanism according to claim 6, characterized in that: One end of the two groups of locking member installation arms (520) is respectively rotatably mounted on the bracket (100) and the other end serves as a locking member matching portion (540).

8. The operating mechanism according to claim 1, characterized in that: The jump fastener (600) and the lock fastener (500) always maintain a limited fit.

9. The operating mechanism according to claim 8, characterized in that: One end of the locking main plate (510) of the locking member (500) and the jump fastener (600) is a main plate matching end (511), and the jump fastener (600) and the main plate matching end (511) always abut against each other.

10. The operating mechanism according to claim 9, characterized in that: The jump fastener (600) comprises a jump fastener buckle surface (610) and a jump fastener matching surface (620) that are bent and connected to each other; When the operating mechanism is in a normal state, the buckle surface (610) of the jump fastener abuts against the mating end (511) of the mainboard; when the operating mechanism is in a tripped state, the mating surface (620) of the jump fastener abuts against the mating end (511) of the mainboard.

11. The operating mechanism according to claim 10, characterized in that: The jump fastener matching surface (620) is an arc surface, the center of which coincides with the rotation center of the jump fastener (600).

12. The operating mechanism according to claim 10, characterized in that: The end of the jump fastener fastener surface (610) away from the jump fastener mating surface (620) and the end connected to the jump fastener mating surface (620) are the distal end of the fastener surface and the proximal end of the fastener surface respectively; the distance between the jump fastener fastener surface (610) and the rotation axis of the jump fastener (600) gradually increases from the distal end of the fastener surface to the proximal end of the fastener surface.

13. The operating mechanism according to claim 1, characterized in that: The operating mechanism further comprises a reset structure (400), and the locking member (500) and the traction rod (200) have a tendency to rotate in the same direction under the action of the reset structure (400).

14. The operating mechanism according to claim 13, characterized in that: The operating mechanism further comprises a locking shaft (550), and the locking member (500) is rotatably arranged on the bracket (100) via the locking shaft (550); the reset structure (400) is a reset torsion spring, which is sleeved on the locking shaft (550), with one set of spring arms cooperating with the locking member (500) and the other set of spring arms cooperating with the traction rod (200).

15. The operating mechanism according to claim 1, characterized in that: The operating mechanism further comprises a lower connecting rod (860), one end of which is hinged to the upper connecting rod (810) via a second shaft (820) and the other end of which is used for transmission connection with a moving contact assembly (910) of the switch electrical appliance.

16. The operating mechanism according to claim 1, characterized in that: When the operating mechanism is in the mechanism-opening state and the mechanism-tripping state, the second shaft (820) and the tripping member (600) are limitedly engaged to prevent the upper connecting rod (810) from rotating relative to the tripping member (600) along the direction d2; The second shaft (820) is also used to drive the moving contact assembly (910) to rotate to the moving contact opening position when the operating mechanism switches from the mechanism closing state to the mechanism opening state, so that the opening distance between the moving contact assembly (910) and the corresponding static contact (920) is L1; The second shaft (820) is also used to drive the moving contact assembly (910) to rotate to the moving contact tripping position when the operating mechanism switches from the mechanism closing state to the mechanism tripping state, so that the opening distance between the moving contact assembly (910) and the corresponding static contact (920) is L2.

17. The operating mechanism according to claim 16, characterized in that: The tripping latch (600) further comprises a tripping latch limiting surface (630); when the operating mechanism is in a mechanism-opening state or a mechanism-tripping state, the second shaft (820) abuts against the tripping latch limiting surface (630) to prevent the upper connecting rod (810) from rotating relative to the tripping latch (600) along a direction d2.

18. The operating mechanism according to claim 17, characterized in that: The jump fastener buckle surface (610), the jump fastener matching surface (620) and the jump fastener limiting surface (630) of the jump fastener (600) are connected in sequence.

19. The operating mechanism according to claim 16, wherein: When the operating mechanism is locked again, external force drives the jumper (600) to rotate along the direction d1 and reset through the rocker arm component (700), and the locker (500) and the traction rod (200) are respectively rotated and reset, so that the matching component (300) and the locker (500) release the second limit fit and establish the first limit fit, and the jumper (600) and the locker (500) are restored and maintain the snap fit; the direction d1 and the direction d2 are opposite to each other.

20. A switch electrical device, characterized in that: The switching device includes the operating mechanism according to any one of claims 1 to 19.

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