Magnetic circuit part and relay

Abstract

The utility model discloses a magnetic circuit part and a relay, which comprise a magnetic conductive component with a frame-shaped structure, a coil rack arranged in the magnetic conductive component, a movable iron core movably and axially arranged in the coil rack in a penetrating manner and a coil wound on the coil rack, and the movable iron core is provided with a first end and a second end which are respectively exposed out of the upper end surface and the lower end surface of the magnetic conductive component. And a movable iron core resetting piece for automatically resetting the movable iron core is arranged between the first end or the second end of the movable iron core and the magnetic conductive component. According to the utility model, the iron core structure of the magnetic circuit part is not provided with a static iron core, the structure of the relay is simplified, the movable iron core is independently provided with the reset force through the movable iron core reset piece, the reset force is accurately controlled, and the adjustment is convenient.

Description

Technical Field

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

[0002] Chinese document CN110491732A (application date: August 13, 2019) discloses a flip-chip small relay. Compared with the existing technical solution in which a static iron core and a moving iron core are combined to form an iron core structure (such as CN113412528A), the iron core of this technical solution is a structure without a static iron core, and the iron core as a whole is a moving iron core structure, which is conducive to simplifying the structure of the relay. However, in this technical solution, the moving spring is used to provide a reset reaction force for the moving iron core. In this way, the moving spring must control the contact part to disconnect and control the iron core to reset. The elastic force requirements and assembly accuracy requirements of the moving spring are both high. If the elastic force or assembly accuracy of the moving spring does not meet the requirements, it is easy to affect the accurate control of the on and off of the contact part of the relay. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a magnetic circuit part, which mainly solves the technical problem that the existing structure using a movable spring to provide a reset reaction force for the iron core has high requirements on the elastic force and assembly precision of the movable spring.

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

[0005] A magnetic circuit part includes a magnetic conductive component with a frame structure, a coil frame installed in the magnetic conductive component, a moving iron core movably axially inserted into the coil frame, and a coil wound on the coil frame. The moving iron core has a first end and a second end respectively exposed outside the upper and lower end surfaces of the magnetic conductive component. A moving iron core reset member for automatically resetting the moving iron core is provided between the first end or the second end of the moving iron core and the magnetic conductive component.

[0006] Furthermore, the moving iron core includes a rod portion, the upper end of the rod portion passes through the upper end surface of the magnetic conductive component and forms a driving end for driving the moving contact assembly of the relay, the rod portion passes through the lower end surface of the magnetic conductive component, and the lower end of the rod portion is connected to an iron core end cap corresponding to the lower end surface of the magnetic conductive component.

[0007] Furthermore, the core end cap is detachably connected to the lower end of the rod.

[0008] Furthermore, the core end cap is detachably connected to the lower end of the rod portion through a riveting structure.

[0009] Furthermore, the core end cap is integrally connected to the lower end of the rod.

[0010] 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 moving iron core reset piece abuts against the yoke plate. The upper end of the rod correspondingly passes through the closed end surface at the upper end of the U-shaped yoke and forms a driving end. The lower end of the rod correspondingly passes through the yoke plate and is connected to the moving iron core reset piece.

[0011] Furthermore, the moving iron core reset member includes a main body portion connected to the lower end portion of the rod portion or the iron core end cap 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.

[0012] Furthermore, a positioning groove is respectively provided at the end of the two elastic bending wings, and positioning ribs are provided at the positions corresponding to the two positioning grooves on the yoke iron plate. The sliding cooperation between the positioning groove and the corresponding positioning ribs can produce an anti-rotation guiding and limiting effect on the bending action of the two elastic bending wings.

[0013] Based on the same inventive concept, the utility model also provides a relay, comprising any of the magnetic circuit parts described above.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] In the magnetic circuit part and the relay described in the utility model, the iron core structure of the magnetic circuit part has no static iron core, and only uses a moving iron core, which is beneficial to simplifying the structure of the relay, and the resetting of the moving iron core is provided by a moving iron core resetting member arranged between one of the first end or the second end of the moving iron core and the magnetic conductive component. On the one hand, the installation position of the moving iron core resetting member is exposed outside the magnetic conductive component, which is beneficial to reducing its assembly difficulty and improving assembly efficiency. On the other hand, the moving iron core resetting member provides a resetting force for the moving iron core alone, and the size of the resetting force is accurately controlled and conveniently adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the magnetic circuit part of the embodiment of the utility model.

[0017] Figure 2 yes Figure 1 AA section view in.

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the magnetic circuit part of an embodiment of the utility model.

[0019] Figure 4 It is a structural schematic diagram of a contact portion of a relay in an embodiment of the utility model in a disconnected state.

[0020] Figure 5It is a structural schematic diagram of a contact part of a relay in an embodiment of the utility model in an attracted state.

[0021] Description of labels:

[0022] 1. Magnetic circuit part, 2. Moving contact assembly, 11. Magnetic conductive part, 12. Coil frame, 13. Moving iron core, 14. Coil, 15. Moving iron core reset part, 111. U-shaped yoke, 112. Yoke plate, 131. Rod part, 132. Iron core end cap, 151. Main body, 152. Elastic bending wing piece, 1121. Positioning rib, 1521. Positioning slide groove. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] 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.

[0025] Please refer to the attached Figure 1 To Attachment Figure 5 An embodiment of the utility model provides a magnetic circuit part, including a magnetic conductive component 11 of a frame structure, a coil frame 12 installed in the magnetic conductive component 11, a moving iron core 13 movably axially inserted in the coil frame 12, and a coil 14 wound on the coil frame 12, the moving iron core 13 has a first end and a second end respectively exposed outside the upper and lower end surfaces of the magnetic conductive component 11, and a moving iron core reset member 15 for automatically resetting the moving iron core 13 is provided between the first end or the second end of the moving iron core 13 and the magnetic conductive component 11. It can be understood that, in the present embodiment, the core structure of the magnetic circuit portion has no static core, and only uses a moving core 13, which is conducive to simplifying the structure of the relay, and the resetting of the moving core 13 is provided by a moving core resetting member 15 provided between the first end or the second end of the moving core 13 and the magnetic conductive component 11. On the one hand, the installation position of the moving core resetting member 15 is exposed outside the magnetic conductive component 11, which is conducive to reducing the difficulty of assembly and improving the assembly efficiency. On the other hand, the moving core resetting member 15 alone provides a resetting force for the moving core 13, and the magnitude of the resetting force is accurately controlled and conveniently adjusted.

[0026] Please refer to the attached Figure 1 To Attachment Figure 3In one preferred embodiment, the moving iron core 13 includes a rod portion 131, the upper end of the rod portion 131 passes through the upper end surface of the magnetic conductive component 11 and forms a driving end for driving the moving contact assembly 2 of the relay, the rod portion 131 passes through the lower end surface of the magnetic conductive component 11, and the lower end of the rod portion 131 is connected with an iron core end cap 132 corresponding to the lower end surface of the magnetic conductive component 11. In one preferred embodiment, the iron core end cap 132 is detachably connected to the lower end of the rod portion 131. Preferably, the iron core end cap 132 is detachably connected to the lower end of the rod portion 131 through a riveting structure. It can be understood that in this embodiment, when it is necessary to adjust the magnetic conductive area of ​​the moving iron core 13 and the yoke iron plate 112, it is necessary to rivet an iron core end cap 132 of a corresponding diameter at the lower end of the rod portion 131. 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 12. In addition, referring to the attached Figure 2 When the coil 14 is energized, the moving iron core 13 will overcome the elastic force of the moving iron core reset piece 15 and move up relative to the coil frame 12 until the moving iron core end cap 132 contacts the yoke iron plate 112. At this time, the moving iron core reset piece 15 generates a reset force. When the coil 14 is de-energized, under the action of the reset force of the moving iron core reset piece 15, the moving iron core 13 will move down relative to the coil frame 12 and reset to its initial position.

[0027] However, those skilled in the art should understand that in other embodiments, the core end cap 132 may also be integrally connected to the lower end of the rod portion 131 .

[0028] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, the magnetic conductive component 11 includes a U-shaped yoke 111 and a yoke plate 112 connected to the open end of the U-shaped yoke 111. The U-shaped yoke 111 and the yoke plate 112 are combined to form a frame structure. The moving iron core reset member 15 abuts against the yoke plate 112. The upper end of the rod portion 131 correspondingly passes through the closed end surface at the upper end of the U-shaped yoke 111 and forms a driving end. The lower end of the rod portion 131 correspondingly passes through the yoke plate 112 and is connected to the moving iron core reset member 15.

[0029] Please refer to the attached Figure 1 To Attachment Figure 3In one preferred embodiment, the movable iron core reset member 15 includes a main body 151 connected to the lower end of the rod 131 or the iron core end cap 132 and at least two elastic bending fins 152 symmetrically connected to both sides of the main body 151 and elastically pressed against the yoke iron plate 112, and the movable iron core reset member 15 provides the movable iron core 13 with a reset force for controlling the contact part to disconnect. In this embodiment, preferably, a positioning slot 1521 is respectively provided at the end of the two elastic bending fins 152, and a positioning rib 1121 is provided at the position corresponding to the two positioning slots 1521 on the yoke iron plate 112, and the sliding cooperation between the positioning slot 1521 and the corresponding positioning rib 1121 produces an anti-rotation guide limit function for the bending action of the two elastic bending fins 152. In this embodiment, preferably, the main body 151 is riveted at the lower end of the rod 131 and fits the bottom position of the core end cap 132, and a positioning hole is provided on the main body 151, and a positioning protrusion corresponding to the positioning hole is provided on the core end cap 132, and the positioning hole and the positioning protrusion are positioned to further prevent the connection between the moving iron core 13 and the moving iron core reset member 15 from rotating. It can be understood that in this embodiment, the moving iron core reset member 15 can provide a reset force for the moving iron core 13, and at the same time, the mutual cooperation between the positioning slot 1521 and the positioning rib 1121 can prevent the moving iron core 13 from rotating relative to the yoke iron plate 112, thereby improving the stability of the up and down movement of the moving iron core 13.

[0030] Please refer to the attached Figure 1 To Attachment Figure 5 An embodiment of the utility model also provides a relay, including the magnetic circuit part of any of the above embodiments.

[0031] 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 magnetic circuit part, characterized in that: The invention comprises a magnetic conductive component (11) of a frame structure, a coil frame (12) installed in the magnetic conductive component (11), a moving iron core (13) movably and axially inserted in the coil frame (12), and a coil (14) wound on the coil frame (12); the moving iron core (13) has a first end and a second end respectively exposed outside the upper and lower end surfaces of the magnetic conductive component (11); and a moving iron core reset member (15) for automatically resetting the moving iron core (13) is provided between the first end or the second end of the moving iron core (13) and the magnetic conductive component (11).

2. The magnetic circuit portion according to claim 1, characterized in that: The moving iron core (13) comprises a rod portion (131), the upper end of the rod portion (131) passes through the upper end surface of the magnetic conductive component (11) and forms a driving end for driving a moving contact assembly (2) of a relay, the rod portion (131) passes through the lower end surface of the magnetic conductive component (11), and the lower end of the rod portion (131) is connected to an iron core end cap (132) corresponding to the lower end surface of the magnetic conductive component (11).

3. The magnetic circuit portion according to claim 2, characterized in that: The core end cap (132) is detachably connected to the lower end of the rod portion (131).

4. The magnetic circuit portion according to claim 3, characterized in that: The core end cap (132) is detachably connected to the lower end of the rod portion (131) through a riveting structure.

5. The magnetic circuit portion according to claim 2, characterized in that: The core end cap (132) is integrally connected to the lower end of the rod portion (131).

6. The magnetic circuit portion according to claim 3 or 5, characterized in that: The magnetic conductive component (11) comprises a U-shaped yoke (111) and a yoke plate (112) connected to the open end of the U-shaped yoke (111); the U-shaped yoke (111) and the yoke plate (112) are combined to form a frame-shaped structure; the moving iron core reset piece (15) abuts against the yoke plate (112); the upper end of the rod portion (131) correspondingly passes through the closed end surface at the upper end of the U-shaped yoke (111) and forms a driving end; and the lower end of the rod portion (131) correspondingly passes through the yoke plate (112) and is connected to the moving iron core reset piece (15).

7. The magnetic circuit portion according to claim 6, characterized in that: The movable iron core reset member (15) comprises a main body (151) connected to the lower end of the rod (131) or the iron core end cap (132) and at least two elastically bent wings (152) symmetrically connected to both sides of the main body (151) and elastically pressed against the yoke iron plate (112). The movable iron core reset member (15) provides the movable iron core (13) with a reset force for controlling the contact part to disconnect.

8. The magnetic circuit portion according to claim 7, characterized in that: A positioning groove (1521) is respectively provided at the end of the two elastic bending wings (152), and a positioning convex rib (1121) is provided at the position corresponding to the two positioning grooves (1521) on the yoke iron plate (112), and the positioning groove (1521) and the corresponding positioning convex rib (1121) are slidably matched to produce an anti-rotation guide limit function for the bending action of the two elastic bending wings (152).

9. A relay, characterized in that: It comprises the magnetic circuit portion (1) as claimed in any one of claims 1 to 8.

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