Manual operating mechanism and electromagnetic relay

Abstract

The utility model discloses a manual operating mechanism and electromagnetic relay, manual operating mechanism is used for switching equipment manual break -make, including fixed frame, a plurality of limit pieces and be used for executing manual break -make operating part, a plurality of limit pieces are respectively sliding or rotation setting in fixed frame, and a plurality of limit pieces can open or draw close to each other to change the interval between a plurality of limit pieces, operating part is set between a plurality of limit pieces, and can along make switching equipment break -make or break -make direction displacement, and operating part makes switching equipment break -make direction movement to position, and operating part is locked by the plurality of limit pieces that draw close to each other, a plurality of limit pieces are through relative each other open and remove the locking of operating part to make operating part can along make switching equipment break -make direction movement. The utility model discloses simple structure, response speed piece, and it adopts a plurality of limit pieces to lock operating part in the in -place state, and the reliability of the utility model work has been improved greatly.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, and in particular to a manual operating mechanism and an electromagnetic relay. Background Technology

[0002] Currently, switchgear such as relays and contactors are typically equipped with manual operating mechanisms to enable manual opening and closing operations in case of power outages or equipment maintenance. These manual operating mechanisms usually employ mechanical transmission structures such as gears, linkages, or worm gears, driving contact movement by rotating a handle or pressing a button, and are equipped with mechanical interlocking devices. However, this traditional design has significant limitations: the mechanical structure is relatively complex, and the response speed is slow. Utility Model Content

[0003] This utility model addresses the technical problems existing in the prior art by providing a manual operating mechanism and an electromagnetic relay. Through structural improvements, it simplifies the structure while enhancing the convenience and reliability of operation.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a manual operating mechanism for manually opening and closing a switchgear, characterized in that: it includes a fixed frame, multiple limiting members, and an operating member for performing manual opening and closing; the multiple limiting members are respectively slidably or rotatably disposed on the fixed frame, and the multiple limiting members can open or close relative to each other to change the distance between the multiple limiting members; the operating member is disposed between the multiple limiting members and can be displaced in the direction of opening or closing the switchgear, and when the operating member moves to the position in the direction of closing the switchgear, the operating member is locked by the multiple limiting members that are close to each other; the multiple limiting members release the locking of the operating member by opening relative to each other, so that the operating member can move in the direction of opening the switchgear.

[0005] In a preferred embodiment, the operating member is provided with a latching portion, which is a latching protrusion or a latching groove. When the operating member moves to the position in the direction that closes the switching device, the plurality of limiting members respectively engage with the latching portion of the operating member.

[0006] In a preferred embodiment, the latching portion is disposed on the outer side of the operating member and extends circumferentially along the operating member to form a closed-loop structure; the shape of the portion of the plurality of limiting members used to engage with the latching portion is adapted to the shape of the outer side of the operating member. Before the operating member moves to the position in the direction of closing the switch device, the portion engages with the periphery of the operating member. When the operating member moves to the position in the direction of closing the switch device, the portion engages with the latching portion.

[0007] In a preferred embodiment, a first reset element is provided between the limiting members or between the limiting members and the fixing frame to drive the plurality of limiting members to reset in a direction relative to each other, and each limiting member is manually driven to move in a direction relative to each other.

[0008] In a preferred embodiment, two limiting members are provided, and the two limiting members are slidably connected to the fixing frame in a direction perpendicular to the direction of displacement of the operating member, and the first reset element is provided between the two limiting members.

[0009] In a preferred embodiment, the first reset element includes an elastic element, the two ends of which are respectively connected to the two limiting elements; the elastic element is provided in multiple ways, and the multiple elastic elements are distributed on opposite sides of the operating element.

[0010] In a preferred embodiment, the two limiting members each include a sliding plate and a lever. The lever is integrally formed with or connected to the sliding plate and can be operated to drive the sliding plate to slide. The sliding plates of the two limiting members are parallel, and the two ends of each sliding plate are slidably disposed in the corresponding elongated groove of the fixing frame.

[0011] In a preferred embodiment, the fixing frame forms a first frame structure having four side walls. The two limiting members are slidably connected to a pair of opposite side walls of the first frame structure, and the other pair of opposite side walls of the first frame structure are respectively provided with mounting portions for installation and fixing.

[0012] In a preferred embodiment, the outer surface of the operating member is circular, and the side of each of the plurality of limiting members facing the operating member is provided with an inwardly concave arc surface adapted to the outer surface of the operating member.

[0013] In a preferred embodiment, the operating element is in the form of a button, which moves in the direction of closing the switching device when pressed; the operating element is provided with a second reset element for driving the operating element to reset in the direction of opening the switching device.

[0014] This utility model also provides an electromagnetic relay, including a magnetic circuit part and a contact part. The magnetic circuit part includes a coil frame, and a moving iron core assembly is disposed in the shaft hole of the coil frame. The contact part includes a moving contact part and a stationary contact part that cooperate with each other. It also includes a manual operating mechanism as described above. The operating member is disposed on the side of the moving iron core assembly away from the moving contact part, and the operating member drives the moving iron core assembly to move axially, so that the moving iron core assembly drives the moving contact part to close with the stationary contact part.

[0015] In a preferred embodiment, the moving iron core assembly includes a moving iron core and a push rod. The moving iron core passes through the shaft hole of the coil frame, and the push rod passes through the moving iron core, and the two are fixed coaxially. One end of the push rod away from the moving contact portion protrudes out of the moving iron core and is fitted with a second reset element. The second reset element is an elastic element and elastically abuts against the operating member and the moving iron core.

[0016] In a preferred embodiment, the magnetic circuit portion further includes a yoke assembly, which includes a U-shaped first yoke and a flat second yoke. The second yoke is disposed at both ends of the first yoke, and the two together form a second frame structure. The coil frame is disposed within the second frame structure. The two ends of the second yoke protrude outward from the outside of the first yoke, and the fixing bracket is disposed on the side of the second yoke facing away from the first yoke and is fixedly connected to the two ends of the second yoke.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The manual operating mechanism of this utility model includes the fixed frame, multiple limiting components, and an operating component. The operating component directly performs the opening and closing functions, eliminating the need for a complex transmission structure, greatly simplifying the structure and improving response speed. In particular, this utility model uses multiple limiting components working together to lock the operating component in the direction that causes the switchgear to close, ensuring the stability of the operating component in the closed position, thereby greatly improving the reliability of this utility model.

[0019] 2. Preferably, the operating member is provided with a locking part. When the operating member moves to its position in the direction that closes the switching device, the plurality of limiting members respectively engage with the locking part of the operating member. This design can significantly improve the locking effect of the limiting members on the operating member and the precise control of the locking position. In particular, this utility model can achieve height adaptability to products with different closing strokes. Specifically, when designing for different products, the initial position height of the locking part can be flexibly designed according to the specific closing stroke of the product to ensure that the initial position height of the locking part is precisely matched with the closing stroke of the product, thereby ensuring the effective operation of the manual operating mechanism of this utility model on various products. The locking part preferably has a slot. The design of the slot will not interfere with the movement of the operating member and ensure the smoothness of the operating member's movement.

[0020] 3. Each limit switch is manually activated to release the locking mechanism of the operating component. This design ensures that the release of the operating component is only performed with human intervention, effectively preventing abnormal tripping due to misoperation. Through this unique limit mechanism, this invention significantly improves the safety and reliability of the switchgear, ensuring that accidental tripping does not occur under unexpected circumstances, thus guaranteeing the normal operation of the equipment and the safety of operators. Specifically, this invention uses multiple limit switches, and these limit switches must be manually activated simultaneously to release the locking mechanism of the operating component. This design, through an interlocking mechanism among multiple limit switches, ensures that the release of the operating component only occurs when all limit switches are correctly operated. This interlocking structure effectively prevents accidental tripping due to misoperation or accidental triggering, significantly improving the safety and reliability of the switchgear and ensuring safe and stable operation under various operating conditions.

[0021] 4. Preferably, there are two limiting members, and a first reset element is set between the two limiting members. This design simplifies the structure and reduces manufacturing costs by reducing the number of limiting members. On the other hand, by utilizing the reset characteristics of the first reset element, it not only ensures the automatic reset function after the limiting members are activated, but also enhances the stability of the interlocking structure formed by the two limiting members.

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the manual operating mechanism and electromagnetic relay of the present invention are not limited to the embodiments. Attached Figure Description

[0023] Figure 1 This is an exploded view of the manual operating mechanism of this utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the lever of this utility model (bottom facing up);

[0025] Figure 3 This is a three-dimensional structural diagram of the manual operating mechanism of this utility model;

[0026] Figure 4 This is a top view of the manual operating mechanism of this utility model;

[0027] Figure 5 This is a cross-sectional view of the manual operating mechanism of this utility model;

[0028] Figure 6 This is a cross-sectional view (showing a part) of the electromagnetic relay of this utility model;

[0029] Figure 7 yes Figure 6 An enlarged schematic diagram of part A in the middle;

[0030] In the diagram, 1. Fixing frame; 11. First fixing plate; 111. Slide groove; 12. Second fixing plate; 121. Mounting part; 122. Mounting hole; 2. Limiting component; 21. Slide plate; 211. Concave arc surface; 212. Hanging groove; 213. Insert block; 22. Toggle block; 221. Slot; 3. Operating component; 31. Card slot; 4. Tension spring; 5. Spring; 6. Magnetic circuit part; 61. Coil frame; 62. Coil; 63. Moving iron core; 64. Push rod; 65. Stationary iron core; 66. First yoke; 67. Second yoke; 68. Reaction spring; 7. Middle cover; 71. Protruding post; 8. Upper shell; 81. First operating hole; 82. Second operating hole; 9. Bolt; 10. Nut. Detailed Implementation

[0031] In this utility model, the terms "first," "second," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "inner," "outer," and "top / bottom" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, and is solely for the convenience of describing this utility model, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this utility model. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] Furthermore, in the description of this utility model, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0033] Please see Figures 1-5As shown, this utility model discloses a manual operating mechanism for manually opening and closing a switchgear. It includes a fixed frame 1, multiple limiting members 2, and an operating member 3 for performing manual opening and closing. The multiple limiting members 2 are slidably or rotatably disposed on the fixed frame 1, and can open or close relative to each other to change the distance between them. The operating member 3 is disposed between the multiple limiting members 2 and can be displaced in the direction that opens or closes the switchgear. When the operating member 3 moves to its position in the direction that closes the switchgear, it is locked by the multiple limiting members 2 that are close to each other. The multiple limiting members 2 release the lock on the operating member 3 by opening relative to each other, allowing the operating member 3 to move in the direction that opens the switchgear. In this embodiment, the direction of displacement of the operating member 3 is its axial direction, which is also consistent with the closing / opening direction of the switchgear, but is not limited to this. The closing direction of the switchgear refers to the direction that causes the switchgear contacts to close, and the opening direction refers to the direction that causes the switchgear contacts to open.

[0034] In a preferred embodiment, the outer surface of the operating member 3 is provided with a locking portion. When the operating member 3 moves to its position in the direction of closing the switchgear, the plurality of limiting members 2 respectively engage with the locking portion of the operating member 3 to restrict the operating member 3 from resetting in the direction of opening the switchgear. Preferably, the locking portion extends circumferentially along the operating member 3 and forms a closed-loop structure. The shape of the part of each limiting member 2 used to engage with the locking portion is adapted to the shape of the outer surface of the operating member 3. Before the operating member 3 moves to its position in the direction of closing the switchgear, the part is fitted around the periphery of the operating member 3. When the operating member 3 moves to its position in the direction of closing the switchgear, the part engages with the locking portion.

[0035] The design of the locking part significantly improves the locking effect of the limiting member 2 on the operating member 3, as well as the precise control of the locking position. The locking part design also enhances the adaptability of this invention to products with different closing strokes: when designing for different products, the initial position height of the locking part can be flexibly designed according to the specific closing stroke of the product, ensuring that the initial position height of the locking part accurately matches the closing stroke of the product, thereby guaranteeing the effective operation of the manual operating mechanism of this invention on various products.

[0036] In this embodiment, the locking part preferably has a locking groove 31. The design of the locking groove 31 will not interfere with the movement of the operating member 3, ensuring the smooth operation of the operating member 3. In other embodiments, the locking part is a locking protrusion protruding on the outer side of the operating member. In order to reduce the impact of the locking protrusion on the smoothness of the operation of the operating member, a chamfered bevel can be provided on the locking protrusion, so that when the locking protrusion contacts the limiting member, the chamfered bevel can push the limiting member, thereby causing each limiting member to move a certain displacement in the direction of opening relative to each other to avoid the operating member, so that the operating member can smoothly move into place in the direction of closing the switchgear.

[0037] In this embodiment, the outer surface of the operating member 3 is circular, and therefore the engaging portion (i.e., the slot 31) is annular. Each of the multiple limiting members 2 has a concave arc surface 211 on the side facing the operating member 3, which is adapted to the outer surface of the operating member 3. The concave arc surface 211 of each limiting member 2 is located at the aforementioned location and adapts to the outer surface of the operating member 3. This ensures that the operating member 3 can move smoothly along a predetermined path without affecting the engagement of the limiting member 2 with the slot 31.

[0038] In this embodiment, a first reset element is provided between the limiting members 2 or between the limiting member 2 and the fixing frame 1 to drive the multiple limiting members 2 to reset in a direction relative to each other. Each limiting member 2 is manually driven to move in a direction relative to each other to release the lock on the operating member 3. This design ensures that the release of the operating member 3 is only performed under human intervention, thereby effectively avoiding abnormal tripping of the product due to misoperation. In particular, in this utility model, multiple limiting members 2 are designed, and these limiting members 2 must be manually driven simultaneously to release the lock on the operating member 3. This design creates an interlocking mechanism among the multiple limiting members 2, ensuring that the release of the operating member 3 can only occur when all limiting members 2 are operated correctly. This interlocking structure effectively prevents accidental tripping due to misoperation or accidental triggering, significantly improving the safety and reliability of the switchgear and ensuring safe and stable operation under various operating conditions.

[0039] In a preferred embodiment, two limiting members 2 are provided, each slidingly connected to the fixed frame 1 in a direction perpendicular to the axial direction of the operating member 3, and a first reset element is provided between the two limiting members 2. This simplifies the structure and reduces manufacturing costs by reducing the number of limiting members 2; furthermore, the reset characteristic of the first reset element ensures the automatic reset function of the limiting members 2 after action, and enhances the stability of the interlocking structure formed by the two limiting members 2. In other embodiments, at least three limiting members 2 are provided, and / or the first reset element is disposed between the limiting member 2 and the fixed frame 1. In other embodiments, the limiting member is rotatably connected to the fixed frame, and the axis of rotation of the limiting member is parallel to the axis of the operating member, with the first reset element disposed between the limiting member and the fixed frame.

[0040] The first reset element includes multiple elastic elements distributed on opposite sides of the operating member 3, ensuring a more balanced force on the two limiting members 2 on opposite sides of the operating member 3. In other embodiments, the first reset element includes a magnetic attraction assembly to drive the limiting members 2 to reset using magnetic attraction. In this embodiment, the elastic element is preferably a tension spring 4, with both ends of the tension spring 4 connected to the two limiting members 2 in a hook-and-loop manner.

[0041] like Figure 1 As shown, the two limiting members 2 each include a sliding plate 21 and a lever 22 disposed on the sliding plate 21. The sliding plates 21 of the two limiting members 2 are parallel, and the two ends of each sliding plate 21 are slidably disposed on the corresponding elongated grooves 111 of the fixing frame 1. Specifically, the opposite inner surfaces of the two sliding plates 21 are respectively provided with the aforementioned concave arc surfaces 211. The thickness of the two sliding plates 21 is approximately matched with the dimension of the slot 31 on the operating member 3 in the axial direction of the operating member 3, so that the two sliding plates 21 can directly engage with the slot 31, thus eliminating the need for additional protruding structures for engaging with the slot 31. The lever 22 is integrally formed with or connected to the sliding plate 21 and can be operated to drive the sliding plate 21 to slide. In this embodiment, the lever 22 is connected to the sliding plate 21 as an example, but it is not limited to this. One possible connection method between the lever 22 and the slide plate 21 is as follows, but not limited to this: Each of the two slide plates 21 has a protruding insert 213 on its opposite outer side, which engages with a slot 221 on the bottom surface of the lever 22. The insert 213 and the lever 22 are L-shaped, but not limited to this. Each slide plate 21 has a hanging groove 212 at both ends for attaching the tension spring 4.

[0042] The fixing frame 1 forms a first frame structure with four side walls. Two limiting members 2 are slidably connected to a pair of opposite side walls of the first frame structure. The other pair of opposite side walls of the first frame structure are respectively provided with mounting portions 121 for installation and fixing. Specifically, in this embodiment, the fixing frame 1 includes two parallel first fixing plates 11 and two parallel second fixing plates 12. The two first fixing plates 11 are located between the two second fixing plates 12 and are connected together by a plug-in method to form the first frame structure. The two first fixing plates 11 are respectively provided with sliding grooves 111, and the two second fixing plates 12 are respectively provided with mounting portions 121. The mounting portions 121 protrude from the outside of the second fixing plates 12 and are flat, and are provided with mounting holes 122 that pass through vertically.

[0043] In this embodiment, the operating element 3 is in the form of a button, which moves in the closing direction when pressed; therefore, the operating element 3 can also be called a button. The operating element 3 is equipped with a second reset element, which drives the operating element 3 to reset in the direction that opens the switchgear. However, this second reset element is not essential. In other embodiments, a related component of the switchgear (e.g., the moving iron core assembly described below) can be used to drive the operating element 3 to reset. The second reset element is preferably an elastic element, specifically a spring 5, but it is not limited to this. In specific applications, the second reset element can be elastically pressed between the operating element 3 and a related component of the switchgear (e.g., the upper housing or moving iron core described below). In other embodiments, the operating element is in the form of a knob, which moves spirally around its axis when rotated and undergoes axial displacement. Specifically, the operating element is spirally disposed on a related component of the switchgear (e.g., the upper housing described below).

[0044] This invention provides a manual operating mechanism that directly executes the opening and closing functions of a switchgear using an operating component 3. This eliminates the need for a complex transmission structure, greatly simplifying the structure and improving response speed. Multiple limiting components 2 work together to lock the operating component 3 in the direction that would close the switchgear, ensuring the stability of the operating component 3 in the closed position and significantly improving the reliability of the invention. Specifically, the multiple limiting components 2 form an interlocking structure; the locking of the operating component 3 can only be released when each limiting component 2 is manually opened. This effectively prevents accidental tripping due to misoperation or unintended triggering, significantly improving the safety and reliability of the switchgear.

[0045] This invention discloses a manual operating mechanism that can be applied to switching devices such as relays and contactors. The working principle of this manual operating mechanism will be explained in detail below.

[0046] Please see Figure 6 , Figure 7 As shown, an electromagnetic relay of this utility model includes a magnetic circuit part 6, a contact part (not shown in the figure), and a manual operating mechanism as described above. The magnetic circuit part 6 includes a coil frame 61 with a coil 62 wound around it. A moving iron core assembly is disposed in the shaft hole of the coil frame 61. The contact part is located on one side of the coil frame 61 in the axial direction and includes a moving contact part and a stationary contact part that cooperate with each other. An operating member 3 is disposed on the side of the moving iron core assembly away from the moving contact part and is coaxially arranged with the moving iron core assembly. The operating member 3 pushes the moving iron core assembly to move along one side of its axial direction, causing the moving iron core assembly to drive the moving contact part to close with the stationary contact part. When the operating member 3 moves along the other side of the axial direction of the moving iron core assembly, the operating member 3 releases the moving iron core assembly. The moving iron core assembly is reset by the reaction spring 68 and / or the reaction force of the moving contact part, causing the moving contact part to disconnect from the stationary contact part.

[0047] In this embodiment, the moving iron core assembly includes a moving iron core 63 and a push rod 64. The moving iron core 63 passes through the shaft hole of the coil frame 61, and the push rod 64 passes through the moving iron core 63, and the two are coaxially fixed. One end of the push rod 64 away from the moving contact protrudes out of the moving iron core 63 and is fitted with a second reset element. The second reset element (i.e., spring 5) elastically abuts against the operating member 3 and the moving iron core 63. A stationary iron core 65 is also provided in the shaft hole of the coil frame 61. The stationary iron core 65 fits below the moving iron core 63, and a reaction spring 68 elastically abuts against the two.

[0048] The magnetic circuit section 6 also includes a yoke assembly, which forms a second frame structure. The coil frame 61 is disposed within this second frame structure, and the fixing frame 1 is located outside the second frame structure and is fixed relative to the yoke assembly. Specifically, the yoke assembly includes a U-shaped first yoke 66 and a flat second yoke 67. The second yoke 67 is disposed at both ends of the first yoke 66, and the two together form a second frame structure. The two ends of the second yoke 67 protrude beyond the outer side of the first yoke 66. The fixing frame 1 is disposed on the side of the second yoke 67 facing away from the first yoke 66 and is fixedly connected to both ends of the second yoke 67.

[0049] This utility model also includes a housing part, which specifically includes a base (not shown in the figure), an upper shell 8 and a middle cover 7. The middle cover 7 is connected to the base and forms a contact cavity. The upper shell 8 is connected to the middle cover 7, and the two form a magnetic circuit cavity. The magnetic circuit part 6 is disposed in the magnetic circuit cavity, and the contact part is disposed in the contact cavity. Specifically, a contact support that can move up and down is provided in the contact cavity. The moving contact head is divided into a bridge structure, which is disposed on the contact support. A return spring is elastically abutting between the contact support and the base to drive the moving contact part to return to the direction of contact disconnection.

[0050] Hollow protrusions 71 are respectively provided on the top surface of the middle cover 7 at both ends corresponding to the two protrusions 71. The first yoke 66 is placed on the top surface of the middle cover 7 and located between the two protrusions 71. The two ends of the second yoke 67 rest on the tops of the two protrusions 71 respectively. The two mounting parts 121 of the fixing frame 1 rest on the two ends of the second yoke 67 respectively and are fixedly connected to the protrusions 71 by bolt assembly. Specifically, the bolt assembly includes a bolt 9 and a nut 10. The threaded part of the bolt 9 passes through the mounting hole 122 of the mounting part 121 of the fixing frame 1 and the through hole provided on the end of the second yoke 67 in sequence, enters the interior of the protrusion 71, and is threadedly connected to the nut 10 built into the protrusion 71.

[0051] The operating element 3 is confined within the upper shell 8. The upper shell 8 has a first operating hole 81 at a position corresponding to the operating element 3, designed to facilitate pressing the operating element 3 by the user. The upper shell 8 also has second operating holes 82 at positions corresponding to the two levers 22. The upper ends of the two levers 22 slide along the sliding direction of the limiting element 2 and engage with their respective second operating holes 82. These second operating holes 82 facilitate easy movement of the levers 22 by the user.

[0052] This utility model discloses an electromagnetic relay with two operating modes: electromagnetic drive and manual drive. In electromagnetic drive mode, the operating element 3 is in the highest position. When the coil is energized, the magnetic circuit 6 generates a magnetic field. The moving iron core 63 is attracted by the stationary iron core 65, causing the push rod 64 to move downward. The push rod 64 pushes the moving contact part downward, closing the moving contact part with the stationary contact part. When the coil is de-energized, the magnetic field generated by the magnetic circuit 6 disappears, and the moving contact part returns to its original position under the action of the return spring 5. The moving contact part disconnects from the stationary contact part, and the push rod 64 and the moving iron core 63 return to their original position in conjunction with it. The push rod 64 and the moving iron core 63 then return to their initial position under the action of the return spring 68.

[0053] In manual drive mode, pressing down on the operating element 3 pushes the moving iron core 63 downwards, causing the push rod 64 to move downwards as well, thus closing the moving contact with the stationary contact. When the operating element 3 is pressed into place, its side slot 31 engages with the sliding plates 21 of the two limiting elements 2, thereby locking the operating element 3 and preventing the moving iron core 63 assembly from resetting upwards, keeping the moving contact with the stationary contact closed. If the operating element 3 is not pressed into place, its slot 31 cannot engage with the sliding plates 21. After the operating element 3 is released, the moving iron core 63 assembly will reset upwards under the action of the return spring 68 and / or the moving contact, thus failing to close the moving contact with the stationary contact. In the locked state, when the two toggle blocks 22 are moved outwards, the two sliding plates 21 open, thereby releasing the lock on the operating element 3, allowing the operating element 3 and the moving iron core 63 assembly to reset upwards, and the moving contact with the stationary contact to disconnect. When only one of the toggle blocks 22 is moved, causing one of the slide plates 21 to move in the opening direction, the other slide plate 21 will be held in the position of locking the operating member 3 by the action of the tension spring 4, thus preventing the operating member 3 from resetting upwards. Therefore, the two limiting members 2 form an interlocking structure. This interlocking structure effectively prevents accidental tripping due to misoperation or accidental triggering, significantly improving the safety and reliability of relays and other switching equipment, ensuring safe and stable operation under various operating conditions.

[0054] The present invention relates to a manual operating mechanism and an electromagnetic relay. The parts not described herein are the same as or can be implemented using existing technologies.

[0055] The above embodiments are only used to further illustrate a manual operating mechanism and electromagnetic relay of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A manual operating mechanism for manually opening and closing switching equipment, characterized in that: The device includes a fixed frame, multiple limiting members, and an operating member for manually opening and closing the circuit breaker. The multiple limiting members are slidably or rotatably disposed on the fixed frame, and can open or close relative to each other to change the spacing between them. The operating member is disposed between the multiple limiting members and can be displaced in the direction that opens or closes the circuit breaker. When the operating member moves to its position in the direction that closes the circuit breaker, it is locked by the multiple limiting members that are close to each other. The multiple limiting members release the locking of the operating member by opening relative to each other, so that the operating member can move in the direction that opens the circuit breaker.

2. The manual operating mechanism according to claim 1, characterized in that: The operating component is provided with a locking part, which is a locking protrusion or a locking groove. When the operating component moves to the position in the direction that closes the switch, the plurality of limiting components respectively engage with the locking part of the operating component.

3. The manual operating mechanism according to claim 2, characterized in that: The latching part is located on the outer side of the operating member and extends circumferentially along the operating member to form a closed-loop structure; the shape of the portion of the plurality of limiting members used to engage with the latching part is adapted to the shape of the outer side of the operating member. Before the operating member moves to the position in the direction of closing the switch, the portion engages with the outer periphery of the operating member. When the operating member moves to the position in the direction of closing the switch, the portion engages with the latching part.

4. The manual operating mechanism according to claim 1, characterized in that: A first reset element is provided between the limiting members or between the limiting members and the fixing frame to drive the plurality of limiting members to reset in a direction relative to each other, and each limiting member is manually driven to move in a direction relative to each other.

5. The manual operating mechanism according to claim 4, characterized in that: Two limiting members are provided, and the two limiting members are slidably connected to the fixed frame in a direction perpendicular to the direction of displacement of the operating member, and the first reset element is provided between the two limiting members.

6. The manual operating mechanism according to claim 5, characterized in that: The first reset element includes an elastic element, the two ends of which are respectively connected to the two limiting elements; there are multiple elastic elements, which are distributed on opposite sides of the operating element.

7. The manual operating mechanism according to claim 5, characterized in that: The two limiting members each include a sliding plate and a lever. The lever is integrally formed with or connected to the sliding plate and can be operated to drive the sliding plate to slide. The sliding plates of the two limiting members are parallel, and the two ends of each sliding plate are slidably disposed in the corresponding elongated grooves of the fixing frame.

8. The manual operating mechanism according to claim 5, characterized in that: The fixing frame forms a first frame structure with four side walls. The two limiting members are slidably connected to one pair of opposite side walls of the first frame structure. The other pair of opposite side walls of the first frame structure are respectively provided with mounting parts for installation and fixing.

9. The manual operating mechanism according to any one of claims 1-4, characterized in that: The outer surface of the operating component is circular, and the side of each of the plurality of limiting components facing the operating component is provided with an inwardly concave arc surface adapted to the outer surface of the operating component.

10. The manual operating mechanism according to any one of claims 1-8, characterized in that: The operating element is in the form of a button, which moves in the direction of closing the switching device when pressed; the operating element is equipped with a second reset element, which is used to drive the operating element to reset in the direction of opening the switching device.

11. An electromagnetic relay, comprising a magnetic circuit portion and a contact portion, the magnetic circuit portion comprising a coil frame, wherein a moving iron core assembly is disposed in a shaft hole of the coil frame; the contact portion comprising a moving contact portion and a stationary contact portion that cooperate with each other; characterized in that: It also includes a manual operating mechanism as described in any one of claims 1-10, wherein the operating member is disposed on the side of the moving iron core assembly away from the moving contact portion, and the operating member drives the moving iron core assembly to close the moving contact portion with the stationary contact portion by pushing the moving iron core assembly to move axially.

12. The electromagnetic relay according to claim 11, characterized in that: The moving iron core assembly includes a moving iron core and a push rod. The moving iron core passes through the shaft hole of the coil frame, and the push rod passes through the moving iron core, and the two are fixed coaxially. One end of the push rod away from the moving contact portion protrudes out of the moving iron core and is fitted with a second reset element. The second reset element is an elastic element and elastically abuts against the operating member and the moving iron core.

13. The electromagnetic relay according to claim 11, characterized in that: The magnetic circuit section also includes a yoke assembly, which includes a U-shaped first yoke and a flat second yoke. The second yoke is located at both ends of the first yoke, and the two together form a second frame structure. The coil frame is located inside the second frame structure. The two ends of the second yoke protrude outward from the outside of the first yoke. The fixing frame is located on the side of the second yoke that faces away from the first yoke and is fixedly connected to the two ends of the second yoke.

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