Relay with arc extinguishing magnetic steel

Abstract

The utility model discloses a relay with arc extinguishing magnetic steel, which comprises a bottom plate, a magnetic circuit part, a contact part, an arc isolating cover and magnetic steel, the contact part comprises a plurality of contact groups, the arc isolating cover is provided with a plurality of flash barriers used for separating adjacent contact groups, one flash barrier is inserted between every two adjacent contact groups, part of the flash barriers are provided with mounting holes, and the magnetic steel is inserted into the mounting holes. The flash barriers with the mounting holes and the flash barriers without the mounting holes are alternately arranged, and magnetic steel is mounted in the mounting holes. By designing the mounting holes on the flash barrier of the arc-isolating cover, the number of contact groups of a product does not need to be reduced while the arc-extinguishing magnetic steel is added between the contact groups (the arc-extinguishing magnetic steel does not occupy the positions of the contacts), so that the volume of the relay does not need to be increased. According to the design scheme, the structure is compact, the size of the relay is reduced, and miniaturization of the relay is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of relays, in particular to a relay with arc-extinguishing magnetic steel. Background Art

[0002] Traditional magnetic arc extinguishing relays install arc extinguishing magnets between contact groups. The arc extinguishing magnets need to occupy the position of one set of contacts, which reduces the number of contact groups of the product. Usually only two sets of switching contacts are designed. Therefore, for customers who need magnetic arc extinguishing relays with multiple sets of contacts, they need to use two or more relays in combination. If a relay with three or more sets of contacts is made according to the current magnet installation method, the size of the relay will be greatly increased, and the relay cannot be made small. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a relay with an arc-extinguishing magnet, which mainly solves the problem that the magnet occupies the position of the contact group, resulting in a large relay volume and being unfavorable for miniaturization.

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

[0005] A relay with arc-extinguishing magnets comprises a base plate, a magnetic circuit portion, a contact portion, an arc-isolating cover and magnets, wherein the contact portion comprises a plurality of contact groups, the arc-isolating cover has a plurality of arc-isolating plates for isolating adjacent contact groups, an arc-isolating plate is inserted between every two adjacent contact groups, some arc-isolating plates are provided with mounting holes, arc-isolating plates provided with mounting holes and arc-isolating plates not provided with mounting holes are alternately arranged, and magnets are installed in the mounting holes.

[0006] As a preferred embodiment, the arc isolation cover also includes a side plate, all arc isolation plates are located on the same side of the side plate, one end of all arc isolation plates is a free end and is inserted into the gap between the corresponding contact groups, and the other end is connected to the side plate, and the opening of the mounting hole is opened on the side of the side plate away from the arc isolation plate.

[0007] As a preferred embodiment, the multiple contact groups are four contact groups, and the arc isolation cover has three arc isolation plates, which are correspondingly inserted into the three gaps between the four contact groups. Except for the arc isolation plate in the middle position, the other two arc isolation plates are provided with mounting holes, and magnetic steel is provided in the mounting holes.

[0008] As a preferred solution, the opening of the mounting hole is arranged in a rectangular shape, and the two shorter sides of the opening of the mounting hole are parallel to the bottom plate, and the two longer sides are perpendicular to the bottom plate.

[0009] The utility model has the following beneficial effects:

[0010] By designing a mounting hole on the arc-isolating plate of the arc-isolating cover, the arc-extinguishing magnetic steel is added between the contact groups without reducing the number of contact groups of the product (the arc-extinguishing magnetic steel does not occupy the position of the contact), thereby not increasing the volume of the relay. The design scheme of the utility model has a compact structure, reduces the volume of the relay, and is conducive to miniaturization of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a partial structural diagram of a relay according to an embodiment of the utility model;

[0012] Figure 2 It is a structural diagram of an arc isolation cover of an embodiment of the utility model;

[0013] Figure 3 It is a structural diagram of the magnetic steel of an embodiment of the utility model; DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] 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.

[0016] like Figures 1 to 3 As shown, a relay with arc-extinguishing magnets includes a base plate 1, a magnetic circuit part, a contact part, an arc-isolating cover 2 and a magnet 3. The contact part includes a plurality of contact groups 4, each of which includes at least one stationary contact piece and one moving contact piece. The contacts on the stationary contact piece and the contacts on the moving contact piece are opposite to or in contact with each other. The magnetic circuit part includes an armature 5, a yoke, an iron core, a reset spring 6, an iron core frame, a coil, etc., and one end of the moving contact piece is fixed on the armature 5. The arc-isolating cover 2 has a plurality of arc-isolating plates 7 for isolating adjacent contact groups 4. An arc-isolating plate 7 is inserted between every two adjacent contact groups 4. Some of the arc-isolating plates 7 are provided with mounting holes 8. The arc-isolating plates 7 provided with mounting holes 8 and the arc-isolating plates 7 not provided with mounting holes 8 are alternately arranged, and the magnets 3 are installed in the mounting holes 8. The magnetic steel 3 is arranged in the mounting hole 8 on the arc isolation plate 7. The thickness of the arc isolation plate 7 is set according to the spacing between the two contact groups 4. The magnetic steel 3 is set to have a thinner thickness to match the lateral width of the mounting hole 8. This structure will not increase the volume of the relay or reduce the number of contact conversion groups due to the installation of the arc extinguishing magnetic steel 3, thereby miniaturizing the relay.

[0017] The contact group 4 can be configured such that one moving contact piece matches one stationary contact piece, or one moving contact piece matches two stationary contact pieces. Each contact group 4 in this embodiment includes one moving contact piece and two stationary contact pieces, one end of the moving contact piece extends between the two stationary contact pieces, and the contacts on both sides of the moving contact piece are respectively opposite to or in contact with the contacts on the two stationary contact pieces. Of course, in other embodiments, the number of moving contact pieces and stationary contact pieces included in each contact group 4 can be selected and adjusted according to needs, and the present invention does not limit this.

[0018] The contact gap is the gap between the moving contact and the static contact of the same contact group 4 that will generate an arc. The larger the area of ​​the magnetic steel 3 opposite to the contact gap, the more asymmetric the distribution of the magnetic line density will be, the stronger the magnetic blow of the arc will be, and it will be more conducive to arc extinguishing. As a preferred solution, the two surfaces with the largest area on the surface of the magnetic steel 3 are respectively opposite to the contact gaps on both sides of the magnetic steel 3.

[0019] The arc shield also includes a side plate 9, all arc shields 7 are located on the same side of the side plate 9, one end of all arc shields 7 is a free end and is inserted into the gap between the corresponding contact groups 4, and the other end is connected to the side plate 9. The opening of the mounting hole 8 can be set on the bottom surface, side surface, top surface, etc. of the arc shield 2. When the opening of the mounting hole 8 is set on the bottom surface of the arc shield 2, the magnetic steel 3 needs to be installed from the bottom surface of the arc shield 2, which will cause the withstand voltage between the contact groups to decrease, and the magnetic steel 3 may be missed. Therefore, preferably, in this embodiment, the opening of the mounting hole 8 is opened on the side of the side plate 9 away from the arc shield 7. In this way, the opening of the mounting hole 8 is located at a position that can be directly seen by workers during assembly, avoiding missing magnetic steel 3 and the problem of reduced withstand voltage between contact groups.

[0020] Preferably, the side plate 9 is arranged to be perpendicular to the bottom plate 1 and facing the contact group 4, the arc isolation plate 7 is perpendicular to the side plate 9, and the direction in which the magnetic steel 3 is inserted into the mounting hole 8 is the same as the direction in which the arc isolation plate 7 is inserted between the contact groups 4.

[0021] As a preferred solution, the opening of the mounting hole 8 is set to be a rectangle, matching the shape of the arc isolation plate 7, the two shorter sides of the opening of the mounting hole 8 are parallel to the bottom plate 1, and the two longer sides are perpendicular to the bottom plate 1, and the two short sides correspond to the thickness of the magnetic steel 3 described above, so the magnetic steel 3 occupies a smaller lateral dimension between the contact groups 4, does not affect the installation position of the contact group 4, thereby avoiding the increase in the volume of the relay or the reduction in the number of contact conversion groups. As a preferred solution, the magnetic steel 3 is set to be a cuboid, and the magnetic steel 3 of this shape is easy to process and manufacture. As shown in the figure, the magnetic steel 3 of this embodiment is provided with a missing corner on the basic structure of the cuboid shape. In other embodiments, the structure of the magnetic steel 3 is not limited to this.

[0022] As shown in the figure, the relay of this embodiment has four contact groups 4, and the arc isolation cover 2 has three arc isolation plates 7. The three arc isolation plates 7 are correspondingly inserted into the three gaps between the four contact groups 4, so there is a contact group 4 on both sides of each arc isolation plate 7, wherein, except for the arc isolation plate 7 in the middle position, the other two arc isolation plates 7 are provided with mounting holes 8, and magnetic steels 3 are provided in the mounting holes 8. Each magnetic steel 3 can blow arcs to the contact groups 4 on both sides, so four contact groups 4 only need to be configured with two magnetic steels 3, which is conducive to controlling the volume of the arc isolation cover 2 and miniaturizing the relay. In other embodiments, the number of contact groups 4, arc isolation plates 7 and magnetic steels 3 can be adjusted according to demand, and the utility model does not limit this.

[0023] 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 relay with arc-extinguishing magnetic steel, characterized in that: It includes a base plate, a magnetic circuit part, a contact part, an arc isolation cover and a magnetic steel. The contact part includes multiple contact groups. The arc isolation cover has a plurality of arc isolation plates for separating adjacent contact groups. An arc isolation plate is inserted between every two adjacent contact groups. Some arc isolation plates are provided with mounting holes. Arc isolation plates with mounting holes and arc isolation plates without mounting holes are arranged alternately. Magnetic steel is installed in the mounting holes.

2. The relay with arc-extinguishing magnetic steel according to claim 1, characterized in that: The arc isolation cover also includes a side plate, all arc isolation plates are located on the same side of the side plate, one end of all arc isolation plates is a free end and is inserted into the gap between the corresponding contact groups, and the other end is connected to the side plate, and the opening of the mounting hole is opened on the side of the side plate away from the arc isolation plate.

3. The relay with arc-extinguishing magnetic steel according to claim 2, characterized in that: The multiple contact groups are four contact groups, and the arc isolation cover has three arc isolation plates, which are correspondingly inserted into the three gaps between the four contact groups. Except for the arc isolation plate in the middle position, the other two arc isolation plates are provided with mounting holes, and magnetic steel is provided in the mounting holes.

4. The relay with arc-extinguishing magnetic steel according to claim 1, 2 or 3, characterized in that: The opening of the mounting hole is arranged in a rectangular shape, and the two shorter sides of the opening of the mounting hole are parallel to the bottom plate, and the two longer sides are perpendicular to the bottom plate.

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