Manual operation mechanism and electromagnetic relay

Abstract

The invention discloses a manual operation mechanism and an electromagnetic relay, the manual operation mechanism is used for manual opening and closing of switch equipment, the manual operation mechanism comprises a fixing frame, a plurality of limiting pieces and an operation piece used for executing manual opening and closing, and the plurality of limiting pieces are respectively arranged on the fixing frame in a sliding or rotating manner; the plurality of limiting pieces can be opened or closed relative to each other so as to change the distance between the plurality of limiting pieces; the operating part is arranged among the plurality of limiting parts and can move along the opening or closing direction of the switch equipment, and when the operating part moves in place along the closing direction of the switch equipment, the operating part is locked by the plurality of limiting parts which are close to each other; and the plurality of limiting pieces are opened relative to each other to unlock the operation piece, so that the operation piece can move along the opening direction of the switch equipment. The device is simple in structure and high in response speed, the multiple limiting pieces are adopted for locking the operation piece in the in-place state, and the working reliability of the device is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of switchgear, and in particular to a manual operating mechanism and an electromagnetic relay. Background Art

[0002] Currently, switchgear devices such as relays and contactors are often equipped with manual operating mechanisms to facilitate manual opening and closing operations in the event of power supply anomalies or equipment maintenance. These mechanisms typically utilize mechanical transmission structures such as gears, connecting rods, or worm gears. These mechanisms operate by rotating a handle or pressing a button, and are equipped with mechanical interlocks. However, this traditional design has significant limitations: a complex mechanical structure and slow response speed. Summary of the Invention

[0003] In view of the technical problems existing in the prior art, the present invention provides a manual operating mechanism and an electromagnetic relay, which, through structural improvement, simplify the structure while improving the convenience and reliability of operation.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a manual operating mechanism for manually opening and closing a switch device, characterized in that: it includes a fixed frame, a plurality of limit members and an operating member for performing manual opening and closing, the plurality of limit members are respectively slidably or rotatably arranged on the fixed frame, and the plurality of limit members can open or close relative to each other to change the spacing between the plurality of limit members; the operating member is arranged between the plurality of limit members and can be displaced in the direction of opening or closing the switch device, and when the operating member moves into position in the direction of closing the switch device, the operating member is locked by the plurality of limit members that are close to each other; the plurality of limit members release the lock on the operating member by opening relative to each other, so that the operating member can move in the direction of opening the switch device.

[0005] In a preferred embodiment, the operating member is provided with a snap-fitting portion, which is a snap-fitting protrusion or a snap-fitting groove. When the operating member moves into position in the direction of closing the switch device, the multiple limit members respectively snap-fit ​​with the snap-fitting portion of the operating member.

[0006] In a preferred embodiment, the clamping portion is provided on the outer side surface of the operating member and extends along the circumference of the operating member to form a closed-loop structure; the shape of the portion of the plurality of limit members used to engage with the clamping portion is adapted to the shape of the outer side surface of the operating member, and before the operating member moves into position in the direction of closing the switch device, the portion is fitted on the periphery of the operating member, and when the operating member moves into position in the direction of closing the switch device, the portion is engaged with the clamping portion.

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

[0008] In a preferred embodiment, there are two limiting members, which are respectively slidably connected to the fixing frame along a direction perpendicular to the direction in which the operating member is displaced, and the first reset element is arranged between the two limiting members.

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

[0010] In a preferred embodiment, the two limiting members respectively include a slide plate and a shift block, the shift block is integrally formed with the slide plate or connected to the slide plate, and can be operated to drive the slide plate to slide; the slide plates of the two limiting members are parallel, and the two ends of each slide plate are respectively slidably arranged in the corresponding long strip slide grooves of the fixing frame.

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

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

[0013] In a preferred embodiment, the operating member is in the form of a button, which moves in the direction of closing the switching device by being pressed; the operating member is configured with a second reset element, which is used to drive the operating member to reset in the direction of opening the switching device.

[0014] The present invention further provides an electromagnetic relay, comprising a magnetic circuit portion and a contact portion, wherein the magnetic circuit portion comprises a coil frame, a moving iron core assembly is disposed in the axial hole of the coil frame, and the contact portion comprises a moving contact portion and a stationary contact portion that cooperate with each other; and further comprises a manual operating mechanism as described above, wherein the operating member is arranged on a side of the moving iron core assembly away from the moving contact portion, and the operating member pushes the moving iron core assembly to move axially, so that the moving iron core assembly drives the moving contact portion and the stationary contact portion to close.

[0015] In a preferred embodiment, the moving iron core assembly includes a moving iron core and a push rod, the moving iron core is inserted into the axial hole of the coil frame, the push rod is inserted into the moving iron core, and the two are coaxially fixed; one end of the push rod away from the moving contact part protrudes out of the moving iron core, and is sleeved with a second reset element, which is an elastic member and elastically presses between the operating member and the moving iron core.

[0016] In a preferred embodiment, the magnetic circuit portion also includes a yoke assembly, which includes a first U-shaped yoke and a second flat-plate yoke, the second yoke being arranged at both ends of the first yoke, and the two together form a second frame-type structure, the coil frame being arranged in the second frame-type structure, the two ends of the second yoke respectively protruding outward from the outside of the first yoke, and the fixing frame being arranged on the side of the second yoke facing away from the first yoke, and 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 the present invention comprises the aforementioned mounting bracket, multiple position-limiting members, and an operating member. The operating member directly performs opening and closing functions, eliminating the need for a complex transmission structure, significantly simplifying the structure and improving response speed. In particular, the present invention utilizes multiple position-limiting members that cooperate with each other to lock the operating member in the position required to close the switchgear, ensuring the stability of the operating member in the closed position and thus significantly improving the reliability of the present invention.

[0019] 2. Preferably, the operating member is provided with a clamping portion. When the operating member moves into position along the direction of closing the switch device, the multiple limit members are respectively engaged with the clamping portion of the operating member. This design can significantly improve the locking effect of the limit member on the operating member, as well as the precise control of the locking position. In particular, the present invention can achieve high adaptability to products with different closing strokes. Specifically, when designing for different products, the initial position height of the clamping portion can be flexibly designed according to the specific closing stroke of the product to ensure that the initial position height of the clamping portion is accurately matched with the closing stroke of the product, thereby ensuring the effective operation of the manual operating mechanism of the present invention on various different products. The clamping portion is preferably a card slot, and the design of the card slot will not interfere with the movement of the operating member, thereby ensuring the smoothness of the operation of the operating member.

[0020] 3. Each limiter is manually driven to unlock the operating part. This design ensures that the release of the operating part is only carried out under human intervention, thereby effectively avoiding abnormal tripping of the product due to misoperation. Through this unique limiter mechanism, the present invention significantly improves the safety and reliability of the switchgear, ensuring that erroneous tripping does not occur under unexpected circumstances, thereby ensuring the normal operation of the equipment and the safety of the operator. In particular, the limiters in the present invention are designed to be multiple, and these limiters must be manually driven at the same time to release the lock on the operating part. This design ensures that the release of the operating part can only occur when all limiters are correctly operated through the interlocking mechanism between multiple limiters. This interlocking structure effectively prevents accidental tripping due to misoperation or accidental triggering, significantly improves the safety and reliability of the switchgear, and ensures safe and stable operation under various operating conditions.

[0021] 4. Preferably, there are two limit members, and a first reset element is provided between the two limit members. On the one hand, this design simplifies the structure and reduces the manufacturing cost by reducing the number of limit members; on the other hand, with the help of the reset characteristics of the first reset element, it not only ensures the automatic reset function after the limit member is actuated, but also enhances the stability of the interlocking structure formed by the two limit 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an exploded schematic diagram of the manual operating mechanism of the present invention;

[0024] Figure 2 1 is a schematic diagram of the three-dimensional structure of the shift block of the present invention (bottom facing upward);

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the manual operating mechanism of the present invention;

[0026] Figure 4 is a top view of the manual operating mechanism of the present invention;

[0027] Figure 5 is a cross-sectional view of the manual operating mechanism of the present invention;

[0028] Figure 6 1 is a cross-sectional view of the electromagnetic relay of the present invention (partial);

[0029] Figure 7 yes Figure 6 A magnified schematic diagram of part A;

[0030] In the figure, 1. fixing frame; 11. first fixing plate; 111. slide groove; 12. second fixing plate; 121. mounting portion; 122. mounting hole; 2. limiting member; 21. slide plate; 211. concave arc surface; 212. hanging groove; 213. insert block; 22. shift block; 221. slot; 3. operating member; 31. slot; 4. tension spring; 5. spring; 6. magnetic circuit part; 61. coil frame; 62. coil; 63. moving iron core; 64. push rod; 65. static iron core; 66. first yoke; 67. second yoke; 68. reaction spring; 7. middle cover; 71. boss; 8. upper shell; 81. first operating hole; 82. second operating hole; 9. bolt; 10. nut. DETAILED DESCRIPTION

[0031] In the present invention, the terms "first", "second", etc. are only used to distinguish similar objects, rather than to describe a specific order or precedence, and cannot be understood as indicating or implying relative importance. In the description, the orientation or position relationship indicated by "upper", "lower", "inner", "outer", "top / bottom", etc. is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] In the present description, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0033] See Figure 1-Figure 5As shown, a manual operating mechanism of the present invention is used for manually opening and closing a switchgear, comprising a fixed frame 1, a plurality of limit members 2, and an operating member 3 for performing manual opening and closing. The plurality of limit members 2 are respectively slidably or rotatably arranged on the fixed frame 1, and the plurality of limit members 2 can open or close relative to each other to change the spacing between the plurality of limit members 2. The operating member 3 is arranged between the plurality of limit members 2 and can be displaced in the direction of opening or closing the switchgear. When the operating member 3 moves into position in the direction of closing the switchgear, the operating member 3 is locked by the plurality of limit members 2 that are close to each other. The plurality of limit members 2 release the lock on the operating member 3 by opening relative to each other, so that the operating member 3 can move in the direction of opening the switchgear. In this embodiment, the direction in which the operating member 3 is displaced is its axial direction, which is also consistent with the closing / opening direction of the switchgear, but is not limited thereto. The closing direction of the switchgear refers to the direction that causes the contacts of the switchgear to close, and the opening direction refers to the direction that causes the contacts of the switchgear to open.

[0034] As a preferred embodiment, a snap-fit ​​portion is provided on the outer side of the operating member 3. When the operating member 3 moves into position in the direction of closing the switch device, the plurality of limit members 2 respectively engage with the snap-fit ​​portion of the operating member 3 to restrict the operating member 3 from resetting in the direction of opening the switch device. Preferably, the snap-fit ​​portion extends along the circumference of the operating member 3 and forms a closed-loop structure. The shape of the portion of each limit member 2 that is used to engage with the snap-fit ​​portion is adapted to the shape of the outer side of the operating member 3. Before the operating member 3 moves into position in the direction of closing the switch device, the portion fits around the periphery of the operating member 3. When the operating member 3 moves into position in the direction of closing the switch device, the portion engages with the snap-fit ​​portion.

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

[0036] In this embodiment, the engaging portion is preferably a slot 31. The design of the slot 31 does not interfere with the movement of the operating member 3, thereby ensuring the smooth movement of the operating member 3. In other embodiments, the engaging portion is a protrusion provided on the outer side of the operating member. To reduce the impact of the protrusion on the smooth movement of the operating member, a chamfered surface can be provided on the protrusion. When the protrusion contacts the limiting member, the chamfered surface can be used to push the limiting member, thereby causing each limiting member to move a certain distance in the direction of opening relative to each other to avoid the operating member, allowing the operating member to smoothly move into position in the direction of closing the switch device.

[0037] In this embodiment, the outer surface of the operating member 3 is circular, and thus the engaging portion (i.e., the engaging slot 31) is annular. The plurality of position-limiting members 2 are each provided with a concave arcuate surface 211 on the side facing the operating member 3, adapted to fit the outer surface of the operating member 3. The concave arcuate surface 211 of each position-limiting member 2 is located at this location and adapted to fit the outer surface of the operating member 3. This ensures that the operating member 3 can move smoothly along the predetermined path without affecting the engagement between the position-limiting member 2 and the engaging slot 31.

[0038] In this embodiment, a first reset element is provided between the limit members 2 or between the limit members 2 and the fixing frame 1 to drive the multiple limit members 2 to reset in a direction of moving closer to each other. Each limit member 2 is manually driven to move in a direction of opening 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 carried out under human intervention, thereby effectively avoiding abnormal tripping of the product due to misoperation. In particular, the limit members 2 in the present invention are designed to be multiple, and these limit members 2 must be manually driven at the same time to release the lock on the operating member 3. This design forms an interlocking mechanism between the multiple limit members 2, ensuring that the release of the operating member 3 can only occur when all the limit members 2 are correctly operated. This interlocking structure effectively prevents accidental tripping due to misoperation or accidental triggering, significantly improves the safety and reliability of the switchgear, and ensures safe and stable operation under various operating conditions.

[0039] As a preferred embodiment, there are two limit members 2, and the two limit members 2 are respectively connected to the fixed frame 1 by sliding along a direction perpendicular to the axial direction of the operating member 3, and a first reset element is provided between the two limit members 2. In this way, on the one hand, the structure is simplified and the manufacturing cost is reduced by streamlining the number of limit members 2; on the other hand, with the help of the reset characteristics of the first reset element, the automatic reset function of the limit member 2 after the action is ensured, and the stability of the interlocking structure formed by the two limit members 2 is enhanced. In other embodiments, there are at least three limit members 2, and / or the first reset element is provided between the limit member 2 and the fixed frame 1. In other embodiments, the limit member is rotatably connected to the fixed frame, and the axis of the rotation shaft of the limit member is parallel to the axis of the operating member, and the first reset element is provided between the limit member and the fixed frame.

[0040] The first reset element includes a plurality of elastic members, distributed on opposite sides of the operating member 3, ensuring that the force applied to the two limiting members 2 on opposite sides of the operating member 3 is more evenly distributed. In other embodiments, the first reset element includes a magnetic assembly to utilize magnetic attraction to reset the limiting members 2. In this embodiment, the elastic member is preferably a tension spring 4, the ends of which are connected to the two limiting members 2 in a hooked manner.

[0041] like Figure 1As shown, the two limiting members 2 respectively include a slide 21 and a shift block 22 provided on the slide 21. The slides 21 of the two limiting members 2 are parallel, and the two ends of each slide 21 are respectively slidably provided in the corresponding long strip slide groove 111 provided on the fixing frame 1. Specifically, the relative inner side surfaces of the two slides 21 are respectively provided with the above-mentioned concave arc surface 211. The thickness of the two slides 21 roughly matches the size of the card slot 31 on the operating member 3 in the axial direction of the operating member 3, so that the two slides 21 can be directly engaged with the card slot 31, thereby eliminating the need for additional protruding structure for engaging with the card slot 31. The shift block 22 is integrally formed with the slide 21 or connected to the slide 21, and can be operated to drive the slide 21 to slide. In this embodiment, the shift block 22 is connected to the slide 21 as an example, but is not limited to this. One method for connecting the shift block 22 and the slide plate 21 is as follows, but is not limited to this: An insert block 213 is protruded from the opposing outer sides of the two slide plates 21. The insert block 313 engages with a slot 221 provided on the bottom surface of the shift block 22. The insert block 213 and the shift block 22 are each L-shaped, but this is not limiting. Each slide plate 21 has a hanging slot 212 at each end for hanging the tension spring 4.

[0042] The fixing frame 1 forms a first frame-type structure having four side walls. The two limiting members 2 are respectively slidably connected to one pair of opposite side walls of the first frame-type structure. The other pair of opposite side walls of the first frame-type structure are respectively provided with mounting portions 121 for mounting and fixing. Specifically, in this embodiment, the fixing frame 1 includes two first fixing plates 11 and two second fixing plates 12 that are parallel to each other. The two first fixing plates 11 are located between the two second fixing plates 12 and are connected together in a plug-in manner to enclose the first frame-type structure. The two first fixing plates 11 are respectively provided with a slide groove 111, and the two second fixing plates 12 are respectively provided with a mounting portion 121. The mounting portion 121 is protruding from the outside of the second fixing plate 12, and the mounting portion 121 is flat and has a mounting hole 122 that passes through it from top to bottom.

[0043] In this embodiment, the operating member 3 is in the form of a button, which moves in the closing direction by pressing, so the operating member 3 can also be called a button. The operating member 3 is equipped with a second reset element, which is used to drive the operating member 3 to reset in the direction of opening the switch device, but the second reset element is not necessary. In other embodiments, the operating member 3 can be reset by using the relevant components of the switch device (such as the moving iron core assembly described below). The second reset element is preferably an elastic member, specifically a spring 5, but is not limited to this. In specific applications, the second reset element can be elastically pressed between the operating member 3 and the relevant components of the switch device (such as the upper shell or the moving iron core described below). In other embodiments, the operating member is in the form of a knob, which makes a spiral motion around its axis when rotated and is displaced in the axial direction. Specifically, the operating member is spirally arranged on the relevant components of the switch device (such as the upper shell described below).

[0044] The present invention provides a manual operating mechanism that utilizes an operating member 3 to directly perform the opening and closing functions of a switchgear, eliminating the need for a complex transmission structure, significantly simplifying the structure and improving the response speed. It utilizes multiple position-limiting members 2 that cooperate with each other to lock the operating member 3 in the position in which it moves in the direction that closes the switchgear, ensuring the stability of the operating member 3 in the closed position, thereby greatly improving the reliability of the present invention. In particular, an interlocking structure is formed between the multiple position-limiting members 2. The locking of the operating member 3 can only be released when each position-limiting member 2 is manually driven and opened, effectively preventing accidental opening due to misoperation or accidental triggering, significantly improving the safety and reliability of the switchgear.

[0045] A manual operating mechanism of the present invention can be applied to switch devices such as relays and contactors. The working principle of the manual operating mechanism of the present invention will be described in detail below.

[0046] See Figure 6 、 Figure 7 As shown, an electromagnetic relay of the present invention includes a magnetic circuit portion 6, a contact portion (not shown), and a manual operating mechanism of the present invention described above. The magnetic circuit portion 6 includes a coil bobbin 61 wound with a coil 62. A movable iron core assembly is disposed in an axial hole of the coil bobbin 61. The contact portion is located on one side of the coil bobbin 61 in the axial direction and includes a movable contact portion and a stationary contact portion that cooperate with each other. An operating member 3 is disposed on the side of the movable iron core assembly away from the movable contact portion, and the operating member 3 is coaxially arranged with the movable iron core assembly. The operating member 3 pushes the movable iron core assembly along one side of its axial direction, causing the movable iron core assembly to drive the movable contact portion and the stationary contact portion to close. When the operating member 3 moves along the other side of the movable iron core assembly in the axial direction, the operating member 3 releases the movable iron core assembly, which is reset by the reaction force of the reaction spring 68 and / or the movable contact portion, disconnecting the movable contact portion from the stationary contact portion.

[0047] In this embodiment, the movable core assembly includes a movable core 63 and a push rod 64. The movable core 63 is inserted into the axial hole of the coil frame 61, and the push rod 64 is inserted into the movable core 63, and the two are coaxially fixed. The end of the push rod 64, away from the movable contact, protrudes out of the movable core 63 and is sheathed with a second reset element. This second reset element (i.e., spring 5) elastically abuts between the operating member 3 and the movable core 63. A static core 65 is also disposed in the axial hole of the coil frame 61. This static core 65 fits below the movable core 63, and a reaction spring 68 elastically abuts between the two.

[0048] The magnetic circuit portion 6 also includes a yoke assembly, which forms a second frame structure. The coil frame 61 is disposed within the second frame structure. 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. The two together enclose a vertical second frame structure, and the two ends of the second yoke 67 respectively protrude from the outside 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] The present invention also includes a shell 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 encloses a contact cavity. The upper shell 8 is connected to the middle cover 7, and the two enclose a magnetic circuit cavity. The magnetic circuit part 6 is arranged in the magnetic circuit cavity, and the contact part is arranged in the contact cavity. Specifically, a contact support that can move up and down is arranged in the contact cavity. The moving contact part is divided into a bridge structure, which is arranged on the contact support. A reset spring is elastically pressed between the contact support and the base, which is used to drive the moving contact part to reset in the direction of contact disconnection.

[0050] Hollow bosses 71 are provided on the top surface of the middle cover 7, corresponding to the ends of the second yoke 67. The first yoke 66 is positioned on the top surface of the middle cover 7, between the two bosses 71. The two ends of the second yoke 67 rest on the tops of the two bosses 71. The two mounting portions 121 of the fixing frame 1 rest on the ends of the second yoke 67 and are fixedly connected to the bosses 71 using a bolt assembly. Specifically, the bolt assembly includes a bolt 9 and a nut 10. The screw portion of the bolt 9 passes through the mounting hole 122 of the mounting portion 121 of the fixing frame 1 and the through hole provided on the end of the second yoke 67, enters the interior of the boss 71, and is threadedly connected to the nut 10 embedded in the boss 71.

[0051] The operating member 3 is restrained within the upper housing 8. A first operating hole 81 is provided in the upper housing 8 at a position corresponding to the operating member 3. This first operating hole 81 is designed to facilitate a user's pressing of the operating member 3. Second operating holes 82 are provided in the upper housing 8 at positions corresponding to the two shifting blocks 22. The upper ends of the two shifting blocks 22 slideably engage with the corresponding second operating holes 82 along the sliding direction of the retaining member 2. These second operating holes 82 facilitate easy actuation of the shifting blocks 22.

[0052] The electromagnetic relay of the present invention has two operating modes: electromagnetic drive and manual drive. In the electromagnetic drive mode, the operating member 3 is in the highest position. When the coil is energized, the magnetic circuit portion 6 generates a magnetic field, and the movable iron core 63 is attracted by the static iron core 65, moving downward with the push rod 64. The push rod 64 pushes the movable contact portion downward, closing the movable contact portion with the static contact portion. When the coil is de-energized, the magnetic field generated by the magnetic circuit portion 6 disappears, and the movable contact portion is reset upward under the action of the reset spring 5, disconnecting the movable contact portion from the static contact portion, and the push rod 64 and movable iron core 63 are reset upward. The push rod 64 and movable iron core 63 are reset upward to their initial position under the action of the reaction spring 68.

[0053] In manual drive mode, the operating member 3 is pressed downward, pushing the movable core 63 downward, and the push rod 64 follows, causing the movable contact portion and the stationary contact portion to close. When the operating member 3 is pressed into place, the slots 31 on its side engage with the slides 21 of the two limit members 2, thereby locking the operating member 3 and preventing the movable core 63 assembly from returning upward, keeping the movable contact portion and the stationary contact portion in a closed state. If the operating member 3 is not pressed into place, its slots 31 cannot engage with the slides 21. After the operating member 3 is released, the movable core 63 assembly will return upward under the action of the reaction spring 68 and / or the movable contact portion, thus preventing the movable contact portion and the stationary contact portion from closing. When the operating member 3 is locked, when the two shifting blocks 22 are pushed outward relative to each other, the two slides 21 open, thereby unlocking the operating member 3, causing the operating member 3 and movable core 63 assembly to return upward, and the movable contact portion and the stationary contact portion to disconnect. When only one of the shifting blocks 22 is moved, causing one of the slides 21 to open, the other slide 21, under the action of the tension spring 4, remains locked in position against the operating member 3, preventing the operating member 3 from returning upward. Thus, the two stoppers 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 switchgear such as relays, and ensuring safe and stable operation under various operating conditions.

[0054] The manual operating mechanism and electromagnetic relay of the present invention, the parts not involved are the same as those in the prior art or can be implemented by using the prior art.

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

Claims

1. A manual operating mechanism for manually opening and closing a switchgear, characterized in that: It includes a fixed frame, multiple limit members and an operating member for performing manual opening and closing. The multiple limit members are respectively slidably or rotatably arranged on the fixed frame, and the multiple limit members can open or close relative to each other to change the spacing between the multiple limit members; the operating member is arranged between the multiple limit members and can be displaced in the direction of opening or closing the switch device, and when the operating member moves into position in the direction of closing the switch device, the operating member is locked by the multiple limit members that are close to each other; the multiple limit members release the lock on the operating member by opening relative to each other, so that the operating member can move in the direction of opening the switch device.

2. The manual operating mechanism according to claim 1, characterized in that: The operating member is provided with a clamping portion, which is a clamping protrusion or a clamping groove. When the operating member moves to a position in the direction of closing the switch device, the multiple limit members are respectively engaged with the clamping portion of the operating member.

3. The manual operating mechanism according to claim 2, characterized in that: The clamping portion is provided on the outer side surface of the operating member and extends along the circumference of the operating member to form a closed loop structure; the shape of the portion of the plurality of limit members used to engage with the clamping portion is adapted to the shape of the outer side surface of the operating member, and before the operating member moves into position in the direction of closing the switch device, the portion is fitted on the periphery of the operating member, and when the operating member moves into position in the direction of closing the switch device, the portion is engaged with the clamping portion.

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

5. The manual operating mechanism according to claim 4, characterized in that: There are two limiting members, which are respectively slidably connected to the fixing frame along a direction perpendicular to the direction in which the operating member is displaced, and the first reset element is arranged between the two limiting members.

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

7. The manual operating mechanism according to claim 5, characterized in that: The two limiting members respectively include a slide plate and a shift block, which are integrally formed with the slide plate or connected to the slide plate and can be operated to drive the slide plate to slide; the slide plates of the two limiting members are parallel, and the two ends of each slide plate are respectively slidably arranged in the corresponding long strip slide 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 having four side walls. The two limiting members are respectively 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 portions for mounting and fixing.

9. The manual operating mechanism according to any one of claims 1 to 4, characterized in that: The outer side surface of the operating member is circular, and the sides of the plurality of limiting members facing the operating member are respectively provided with concave arc surfaces adapted to the outer side surface of the operating member.

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

11. An electromagnetic relay comprising a magnetic circuit portion and a contact portion, wherein the magnetic circuit portion comprises a coil bobbin, wherein an axial hole of the coil bobbin is provided with a moving iron core assembly; and the contact portion comprises 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 to 10, wherein the operating member is arranged on a side of the moving iron core assembly away from the moving contact part, and the operating member pushes the moving iron core assembly to move axially, so that the moving iron core assembly drives the moving contact part and the static contact part to close.

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 is inserted into the axial hole of the coil frame, and the push rod is inserted into the moving iron core, and the two are coaxially fixed; one end of the push rod away from the moving contact part protrudes out of the moving iron core and is sleeved with a second reset element. The second reset element is an elastic member and elastically presses between the operating member and the moving iron core.

13. The electromagnetic relay according to claim 11, wherein: The magnetic circuit part also includes a yoke assembly, which includes a U-shaped first yoke and a flat-plate-shaped second yoke. The second yoke is arranged at both ends of the first yoke, and the two together form a second frame structure. The coil frame is arranged in the second frame structure, and the two ends of the second yoke respectively protrude from the outside of the first yoke. The fixing frame is arranged 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.

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