A moving contact assembly, a contact part and a relay

Abstract

The utility model discloses a moving contact assembly, a contact part and a relay, comprising a substrate and at least two moving contact pieces, each of which is connected to a first moving contact and a second moving contact, each of which is movably connected to the substrate through a plurality of guide pillars for enabling the moving contact piece to reciprocate in parallel relative to the substrate, and a moving contact piece reset spring for automatically resetting the moving contact piece relative to the substrate is provided between each moving contact piece and the substrate. The substrate of the utility model is insulated and connected to a moving iron core, and at the same time, each moving contact piece is movably connected to the substrate through a plurality of guide pillars and driven by the moving iron core, and a moving contact piece reset spring for automatically resetting the moving contact piece relative to the substrate is provided between each moving contact piece and the substrate. With such an arrangement, the corresponding moving contact piece can be smoothly reciprocated up and down relative to the substrate through the guiding effect of each guide pillar, which greatly improves the movement balance stability of each moving contact piece and ensures that its contact pressure makes reliable contact.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a moving contact assembly, a contact part and a relay. Background Art

[0002] Chinese document CN113412528A discloses a relay, comprising: a first fixed terminal; a first fixed contact connected to the first fixed terminal; a second fixed terminal; a second fixed contact connected to the second fixed terminal; a first movable contact piece; a first movable contact connected to the first movable contact piece and opposite to the first fixed contact; a second movable contact connected to the first movable contact piece and opposite to the second fixed contact; an insulating component connected to the first movable contact piece; and a driving device, which includes a winding frame, a coil wound on the winding frame, and a movable iron core at least partially arranged on the winding frame and connected to the insulating component, the movable iron core moves by the magnetic force generated from the coil, thereby moving the movable contact piece, and the first movable contact piece and the movable iron core are electrically insulated by the insulating component. In this technical solution, the contact device includes a first contact spring and a second contact spring. The first contact spring is arranged between the first movable contact piece and the first support portion. The first contact spring is arranged in the first support hole. The insulating component includes a first spring support portion. The first spring support portion protrudes into the first support hole. The first contact spring is supported by the first spring support portion. In a state where the first movable contact is in contact with the first fixed contact and the second movable contact is in contact with the second fixed contact, the first contact spring presses the first movable contact piece toward the first fixed terminal and the second fixed terminal. The second contact spring is arranged between the second movable contact piece and the second support portion. The second contact spring is arranged in the second support hole. The insulating component includes a second spring support portion. The second spring support portion protrudes into the second support hole. The second contact spring is supported by the second spring support portion. In a state where the third movable contact is in contact with the third fixed contact and the fourth movable contact is in contact with the fourth fixed contact, the second contact spring presses the second movable contact piece toward the first fixed terminal and the second fixed terminal. In this technical solution, since the first movable contact piece and the second movable contact piece are directly and movably connected to the insulating component, the first movable contact and the second movable contact are respectively arranged at the two ends of the first movable contact piece, and the third movable contact and the fourth movable contact are respectively arranged at the two ends of the second movable contact piece, and only a first contact spring and a second contact spring are respectively connected at the middle position of the first movable contact piece and the second movable contact piece, and no guide structure is arranged between the insulating component and the movable contact piece for enabling the movable contact piece to smoothly and stably reciprocate relative to the insulating component. In this way, if the assembly accuracy between the first movable contact piece and the second movable contact piece and the insulating component is poor, then during the closing and disconnecting switching process of the contact structure, there may be problems such as activity jamming and unbalanced activity at the left and right ends between the first movable contact piece and the second movable contact piece and the insulating component, which may cause the closing and disconnecting switching actions between the first movable contact piece and the second movable contact piece and the corresponding fixed terminals to be unbalanced and unstable, affecting the normal use of the relay. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a moving contact assembly, which mainly solves the technical problem that the closing and breaking switching actions between the movable contact pieces and the corresponding fixed terminals of the existing relays are not balanced and stable enough.

[0004] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0005] A moving contact assembly comprises a substrate insulated and connected to a moving iron core of a magnetic circuit portion and at least two moving contact pieces arranged opposite to the substrate, each moving contact piece being connected to a first moving contact and a second moving contact, each moving contact piece being movably connected to the substrate via a plurality of guide pillars for enabling the moving contact piece to reciprocate parallel to the substrate, and a moving contact piece reset spring for automatically resetting the moving contact piece relative to the substrate being provided between each moving contact piece and the substrate.

[0006] Furthermore, a guide column is provided between at least the left and right ends of the movable contact piece and the substrate.

[0007] Furthermore, the upper end of the guide column is fixedly connected to the movable contact piece, and the lower end of the guide column is movably connected to the base plate.

[0008] Furthermore, the movable contact piece return spring is sleeved on the guide pillar, and one end of the movable contact piece return spring presses against the movable contact piece, and the other end presses against the base plate.

[0009] Furthermore, an insulating push block is connected to the substrate, and the substrate is connected to the moving iron core of the magnetic circuit part through the insulating push block, so that when the moving iron core moves, the insulating push block pushes the substrate and then the substrate drives the moving contacts to move synchronously.

[0010] Based on the same inventive concept, the utility model also provides a contact part, including any of the above-mentioned moving contact components and a static contact component adapted to the moving contact component, the static contact component including a first static contact piece and a second static contact piece and at least two static contact pairs, the static contact pair including a first static contact and a second static contact respectively connected to the first static contact piece and the second static contact piece and arranged corresponding to the first moving contact and the second moving contact on the moving contact piece, when the moving contact component contacts the static contact component, the first moving contact and the second moving contact on the two moving contact pieces respectively contact and cooperate with the corresponding first static contact and the second static contact on the first static contact piece and the second static contact piece to form a first circuit and a second circuit arranged in parallel.

[0011] Based on the same inventive concept, the utility model also provides a relay, including a shell, a magnetic circuit part arranged in the shell and the above-mentioned contact part, the magnetic circuit part includes a magnetic conductive component, a coil frame matched with the magnetic conductive component, a moving iron core movably axially inserted in the coil frame, a coil wound on the coil frame and a moving iron core reset member connected to the moving iron core to automatically reset the moving iron core, the upper end of the moving iron core is connected to the substrate of the moving contact assembly to drive the substrate to move and thereby control the closing or disconnection of the contact part.

[0012] Furthermore, the magnetic conductive component includes a U-shaped yoke and a yoke plate connected to the open end of the U-shaped yoke. The U-shaped yoke and the yoke plate are combined to form a frame structure. The coil frame is adaptively accommodated in the frame structure. The upper end of the moving iron core correspondingly passes through the closed end of the U-shaped yoke and is connected to the substrate of the moving contact assembly. The lower end of the moving iron core correspondingly passes through the yoke plate and is connected to the moving iron core reset part elastically pressed against the yoke plate.

[0013] Furthermore, the moving iron core includes a rod portion and an iron core end cap provided at the lower end of the rod portion; preferably, the iron core end cap is detachably connected to the lower end of the rod portion, or the iron core end cap is integrally connected to the lower end of the rod portion.

[0014] Furthermore, the moving iron core reset member includes a main body portion connected to the lower end portion of the rod portion or an iron core end cap arranged at the lower end of the rod portion, and at least two elastic bent wings symmetrically connected to both sides of the main body portion and elastically pressed against the yoke iron plate. The moving iron core reset member provides the moving iron core with a reset force for controlling the contact part to disconnect.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] In the movable contact assembly, contact part and relay described in the utility model, the substrate is configured to be insulated and connected to the movable iron core. At the same time, each movable contact piece is movably connected to the substrate through a plurality of guide pillars and is driven by the movable iron core. In addition, a movable contact piece reset spring for automatically resetting the movable contact piece relative to the substrate is provided between each movable contact piece and the substrate. With such an arrangement, the corresponding movable contact piece can be smoothly reciprocated up and down relative to the substrate through the guiding effect of each guide pillar, which greatly improves the movement balance stability of each movable contact piece and ensures that its contact pressure makes reliable contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the relay in the closed state of the embodiment of the utility model.

[0018] Figure 2 It is a schematic diagram of the overall structure of the relay in the disconnected state of the embodiment of the utility model.

[0019] Figure 3It is a schematic diagram of the assembly structure of the contact part and the magnetic circuit part of the embodiment of the utility model.

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the moving contact assembly of the embodiment of the utility model.

[0021] Figure 5 It is a side view of the moving contact assembly of the embodiment of the utility model.

[0022] Figure 6 yes Figure 5 AA section view in.

[0023] Figure 7 It is a side view of the magnetic circuit portion of an embodiment of the utility model.

[0024] Figure 8 yes Figure 7 BB section view in.

[0025] Fig. 9 It is a three-dimensional structural schematic diagram of the magnetic circuit part of an embodiment of the utility model.

[0026] Description of labels:

[0027] 1. Base plate, 2. Moving contact piece, 3. Guide column, 4. Moving contact piece reset spring, 5. Insulating push block, 6. First static contact piece, 7. Second static contact piece, 8. Shell, 9. Magnetic circuit part, 21. First moving contact, 22. Second moving contact, 61. First static contact, 71. Second static contact, 91. Magnetic conductive component, 92. Coil frame, 93. Moving iron core, 94. Coil, 95. Moving iron core reset piece, 911. U-shaped yoke, 912. Yoke plate, 931. Rod part, 932. Iron core end cap, 951. Main body, 952. Elastic bending wing piece, 9121. Positioning convex rib, 9521. Positioning slide groove. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] Please refer to the attached Figure 1 To Attachment Fig. 9An embodiment of the utility model provides a moving contact assembly, including a substrate 1 insulated and connected to a moving iron core 93 of a magnetic circuit portion 9 and at least two moving contact pieces 2 arranged opposite to the substrate 1, each moving contact piece 2 is connected to a first moving contact 21 and a second moving contact 22, each moving contact piece 2 is movably connected to the substrate 1 through a plurality of guide pillars 3 for enabling the moving contact piece 2 to reciprocate parallel to the substrate 1, and a moving contact piece reset spring 4 is provided between each moving contact piece 2 and the substrate 1 for automatically resetting the moving contact piece 2 relative to the substrate 1. It can be understood that, in the present embodiment, the substrate 1 is configured to be insulated and connected to the moving iron core 93 and driven by the moving iron core 93. At the same time, each moving contact piece 2 is movably connected to the substrate 1 through a plurality of guide pillars 3, and a moving contact piece reset spring 4 is provided between each moving contact piece 2 and the substrate 1 for automatically resetting the moving contact piece 2 relative to the substrate 1. With such an arrangement, the guiding effect of each guide pillar 3 can enable the corresponding moving contact piece 2 to smoothly move back and forth up and down relative to the substrate 1, thereby greatly improving the movement balance stability of each moving contact piece 2 and ensuring its contact pressure for reliable contact.

[0031] Please refer to the attached Figure 3 To Attachment Figure 6 In one preferred embodiment, at least one guide post 3 is provided between the left and right ends of the moving contact piece 2 and the substrate 1. In this embodiment, preferably, the upper end of the guide post 3 is fixedly connected to the moving contact piece 2 (preferably riveted), and the lower end of the guide post 3 is movably connected to the substrate 1, that is, there is a certain matching gap between the lower end of the guide post 3 and the corresponding connection hole of the substrate 1. Preferably, an anti-slip limit end edge is provided at the lower end of the guide post 3 to prevent the moving contact piece 2 from being excessively ejected by the passive contact piece reset spring 4. However, those skilled in the art should understand that in other embodiments, the lower end of the guide post 3 can also be fixedly connected to the substrate 1, and the upper end of the guide post 3 can be movably connected to the moving contact piece 2, and a clearance space for the upper end of the guide post 3 is provided inside the relay. It can be understood that in this embodiment, a guide post 3 is provided between the left and right ends of the moving contact piece 2 and the substrate 1, so that the translation stability of the moving contact piece 2 relative to the substrate 1 can be guaranteed to a large extent, so that the moving contact piece 2 will not have the defect of tilting left and right when it moves up and down relative to the substrate 1. However, those skilled in the art should understand that in other embodiments, guide pillars 3 may be further provided at the middle of the movable contact piece 2 and at the corresponding position of the substrate 1 to further increase the stability of the active connection between the movable contact piece 2 and the substrate 1, that is, the number and arrangement of each guide pillar 3 are not limited to the specific implementation method disclosed in this embodiment. Only when the guide pillars 3 can improve the stability of the active connection between the movable contact piece 2 and the substrate 1, the movable contact piece 2 can be smoothly moved back and forth relative to the substrate 1.

[0032] Please refer to the attached Figure 3 To Attachment Figure 6In one preferred embodiment, the movable contact piece reset spring 4 is sleeved on the guide column 3, and one end of the movable contact piece reset spring 4 presses on the movable contact piece 2, and the other end presses on the substrate 1. It can be understood that in this embodiment, sleeved on the guide column 3, the movable contact piece reset spring 4 is conducive to improving the telescopic stability of the movable contact piece reset spring 4, thereby improving the reset accuracy of each movable contact piece 2.

[0033] Please refer to the attached Figure 3 To Attachment Figure 6 In one preferred embodiment, an insulating push block 5 is connected to the substrate 1, and the substrate 1 is connected to the moving iron core 93 of the magnetic circuit part 9 through the insulating push block 5, so that when the moving iron core 93 moves, the insulating push block 5 pushes the substrate 1 and then the substrate 1 drives the moving contact pieces 2 to move synchronously. It can be understood that in this embodiment, the moving contact pieces 2 are not directly connected to the insulating push block 5, but are connected to the substrate 1 fixedly connected to the insulating push block 5 and then connected to the corresponding guide pillars 3. In this way, the moving iron core 93 can stably push the substrate 1 to move through the insulating push block 5, and then the substrate 1 cooperates with the guide pillars 3 and the moving contact piece reset spring 4 to synchronously push the moving contact pieces 2 to move, which is conducive to improving the movement stability and synchronization consistency of each moving contact piece 2.

[0034] Please refer to the attached Figure 1 To Attachment Figure 6 One embodiment of the utility model further provides a contact part, including a moving contact assembly of any of the above embodiments and a static contact assembly adapted to the moving contact assembly, the static contact assembly including a first static contact piece 6 and a second static contact piece 7 and at least two static contact pairs, the static contact pair including a first static contact 61 and a second static contact 71 respectively connected to the first static contact piece 6 and the second static contact piece 7 and arranged corresponding to the first moving contact 21 and the second moving contact 22 on the moving contact piece 2, when the moving contact assembly contacts the static contact assembly, the first moving contact 21 and the second moving contact 22 on the two moving contact pieces 2 are respectively in contact with the first static contact 61 and the second static contact 71 corresponding to the first static contact piece 6 and the second static contact piece 7 to form a first circuit and a second circuit arranged in parallel. In addition, as shown in the attached Figure 3 As shown, the moving contact assembly of this embodiment includes three moving contact pieces 2, and correspondingly, three pairs of stationary contact pairs are arranged in the stationary contact assembly, so that when the contact parts are in contact and turned on, the three moving contact pieces 2 and the first stationary contact piece 6 and the second stationary contact piece 7 can cooperate to form a first circuit, a second circuit and a third circuit arranged in parallel. In addition, those skilled in the art should understand that in their embodiments, other numbers of moving contact pieces 2 and corresponding stationary contact pairs can also be arranged to form more numbers of parallel circuits.

[0035] Please refer to the attached Figure 1 To Attachment Fig. 9One embodiment of the utility model further provides a relay, comprising a housing 8, a magnetic circuit portion 9 disposed in the housing 8 and the above-mentioned contact portion, wherein the magnetic circuit portion 9 comprises a magnetic conductive component 91, a coil frame 92 matched with the magnetic conductive component 91, a moving iron core 93 movably axially inserted in the coil frame 92, a coil 94 wound on the coil frame 92 and a moving iron core reset member 95 connected to the moving iron core 93 to automatically reset the moving iron core 93, and the upper end of the moving iron core 93 is connected to the substrate 1 of the moving contact assembly to drive the substrate 1 to move and thus control the contact portion to close or disconnect. In this embodiment, preferably, the first static contact piece 6 and the second static contact piece 7 are fixed at the top position of the housing 8 and are arranged opposite to the moving contact assembly up and down.

[0036] Please refer to the attached Figure 1 , Attachment Figure 2 , Attachment Figure 7 To Attachment Fig. 9 In one preferred embodiment, the magnetic conductive component 91 includes a U-shaped yoke 911 and a yoke plate 912 connected to the open end of the U-shaped yoke 911. The U-shaped yoke 911 and the yoke plate 912 are combined to form a frame structure. The coil frame 92 is adaptively accommodated in the frame structure. The upper end of the moving iron core 93 correspondingly passes through the closed end of the U-shaped yoke 911 and is connected to the substrate 1 of the moving contact assembly. The lower end of the moving iron core 93 correspondingly passes through the yoke plate 912 and is connected to the moving iron core reset member 95 elastically pressed against the yoke plate 912.

[0037] Please refer to the attached Figure 1 , Attachment Figure 2 , Attachment Figure 7 To Attachment Fig. 9 In one preferred embodiment, the moving iron core 93 includes a rod portion 931 and a core end cap 932 provided at the lower end of the rod portion 931. The core end cap 932 can be integrally connected to the lower end of the rod portion 931, or be configured to be detachably connected to the lower end of the rod portion 931. In this embodiment, preferably, the core end cap 932 is configured to be detachably connected to the lower end of the rod portion 931 through a riveting structure. It is understandable that in the relay of this embodiment, a static iron core structure is not provided, but a moving iron core 93 is directly used, which axially passes through the coil frame 92 at the upper and lower ends. The upper end of the rod portion 931 of the moving iron core 93 forms a connecting portion for connecting to the insulating push block 5, and an iron core end cap 932 is riveted to the lower end of the rod portion 931. With this arrangement, when it is necessary to adjust the magnetic conductivity area of ​​the moving iron core 93 and the yoke iron plate 912, it is necessary to rivet an iron core end cap 932 of a corresponding diameter to the lower end of the rod portion 931. The adjustment process is simple and convenient, the operation efficiency is high, and the adjustment space is large, which is not limited by the size of the coil hole of the coil frame 92. In addition, referring to the attached Figure 8When the coil 94 is energized, the moving iron core 93 will overcome the elastic force of the moving iron core reset piece 95 and move up relative to the coil frame 92 until the moving iron core end cap 932 contacts the yoke iron plate 912. At this time, the moving iron core reset piece 95 generates a reset force. When the coil 94 is de-energized, under the action of the reset force of the moving iron core reset piece 95, the moving iron core 93 will move down relative to the coil frame 92 and reset to its initial position.

[0038] Please refer to the attached Figure 1 , Attachment Figure 2 , Attachment Figure 7 To Attachment Fig. 9 In one preferred embodiment, the movable iron core reset member 95 includes a main body 951 connected to the lower end of the rod 931 or the iron core end cap 932 and at least two elastic bending fins 952 symmetrically connected to both sides of the main body 951 and elastically pressed against the yoke iron plate 912, and the movable iron core reset member 95 provides the movable iron core 93 with a reset force for controlling the contact part to disconnect. In this embodiment, preferably, a positioning groove 9521 is respectively provided at the ends of the two elastic bending fins 952, and a positioning rib 9121 is provided at the position corresponding to the two positioning grooves 9521 on the yoke iron plate 912, and the sliding cooperation between the positioning groove 9521 and the corresponding positioning rib 9121 produces an anti-rotation guide limit function for the bending action of the two elastic bending fins 952. In this embodiment, preferably, the main body 951 is riveted at the lower end of the rod 931 and fits the bottom position of the core end cap 932, and a positioning hole is provided on the main body 951, and a positioning protrusion corresponding to the positioning hole is provided on the core end cap 932, and the positioning hole and the positioning protrusion are positioned to further prevent the connection between the moving iron core 93 and the moving iron core reset member 95 from rotating. It can be understood that in this embodiment, the moving iron core reset member 95 can provide a reset force for the moving iron core 93, and at the same time, the mutual cooperation between the positioning slot 9521 and the positioning rib 9121 can prevent the moving iron core 93 from rotating relative to the yoke iron plate 912, thereby improving the stability of the moving iron core 93 in the up and down movement.

[0039] As described above, the embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model. Therefore, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the protection scope of the utility model.

Claims

1. A moving contact assembly, characterized in that: The invention comprises a base plate (1) for being insulated and connected to a moving iron core (93) of a magnetic circuit part (9) and at least two moving contact pieces (2) arranged opposite to the base plate (1), each moving contact piece (2) being connected to a first moving contact point (21) and a second moving contact point (22), each moving contact piece (2) being movably connected to the base plate (1) via a plurality of guide pillars (3) for enabling the moving contact piece (2) to reciprocate in parallel relative to the base plate (1), and a moving contact piece reset spring (4) for automatically reset the moving contact piece (2) relative to the base plate (1) is arranged between each moving contact piece (2) and the base plate (1).

2. The movable contact assembly according to claim 1, characterized in that: A guide column (3) is provided between at least the left and right ends of the movable contact piece (2) and the base plate (1).

3. The movable contact assembly according to claim 2, characterized in that: The upper end of the guide column (3) is fixedly connected to the movable contact piece (2), and the lower end of the guide column (3) is movably connected to the base plate (1).

4. The movable contact assembly according to claim 2, characterized in that: The movable contact piece reset spring (4) is sleeved on the guide pillar (3), and one end of the movable contact piece reset spring (4) is pressed against the movable contact piece (2), and the other end is pressed against the base plate (1).

5. The movable contact assembly according to claim 1, characterized in that: An insulating push block (5) is connected to the base plate (1), and the base plate (1) is connected to the moving iron core (93) of the magnetic circuit part (9) through the insulating push block (5), so that when the moving iron core (93) moves, the insulating push block (5) pushes the base plate (1), and then the base plate (1) drives each moving contact piece (2) to move synchronously.

6. A contact portion, characterized in that: The invention comprises a moving contact assembly as claimed in any one of claims 1 to 5 and a stationary contact assembly adapted to the moving contact assembly, wherein the stationary contact assembly comprises a first stationary contact piece (6) and a second stationary contact piece (7) and at least two stationary contact pairs, wherein the stationary contact pairs comprise a first stationary contact (61) and a second stationary contact (71) respectively connected to the first stationary contact piece (6) and the second stationary contact piece (7) and arranged corresponding to the first moving contact (21) and the second moving contact (22) on the moving contact piece (2); when the moving contact assembly contacts the stationary contact assembly, the first moving contact (21) and the second moving contact (22) on the two moving contact pieces (2) respectively contact and cooperate with the corresponding first stationary contact (61) and the second stationary contact (71) on the first stationary contact piece (6) and the second stationary contact piece (7) to form a first circuit and a second circuit arranged in parallel.

7. A relay, characterized in that: The invention comprises a shell (8), a magnetic circuit part (9) arranged in the shell (8) and a contact part as claimed in claim 6, wherein the magnetic circuit part (9) comprises a magnetic conductive part (91), a coil frame (92) matched with the magnetic conductive part (91), a moving iron core (93) movably axially inserted in the coil frame (92), a coil (94) wound on the coil frame (92) and a moving iron core reset member (95) connected to the moving iron core (93) so as to automatically reset the moving iron core (93); the upper end of the moving iron core (93) is connected to the substrate (1) of the moving contact assembly to drive the substrate (1) to move and thereby control the closing or disconnection of the contact part.

8. The relay according to claim 7, characterized in that: The magnetic conductive component (91) comprises a U-shaped yoke (911) and a yoke plate (912) connected to the open end of the U-shaped yoke (911); the U-shaped yoke (911) and the yoke plate (912) are combined to form a frame structure; the coil frame (92) is adaptively accommodated in the frame structure; the upper end of the moving iron core (93) correspondingly passes through the closed end of the U-shaped yoke (911) and is connected to the base plate (1) of the moving contact assembly; the lower end of the moving iron core (93) correspondingly passes through the yoke plate (912) and is connected to a moving iron core reset member (95) elastically pressed against the yoke plate (912).

9. The relay according to claim 7, characterized in that: The moving iron core (93) comprises a rod portion (931) and an iron core end cap (932) arranged at the lower end of the rod portion (931).

10. The relay according to claim 9, characterized in that: The core end cap (932) is detachably connected to the lower end of the rod portion (931).

11. The relay according to claim 9, characterized in that: The core end cap (932) is integrally connected to the lower end of the rod portion (931).

12. The relay according to claim 9, characterized in that: The movable iron core reset member (95) comprises a main body (951) connected to the lower end of the rod (931) or the iron core end cap (932) and at least two elastically bent fins (952) symmetrically connected to both sides of the main body (951) and elastically pressed against the yoke iron plate (912). The movable iron core reset member (95) provides the movable iron core (93) with a reset force for controlling the contact part to disconnect.

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