Relay

Abstract

The utility model discloses a relay, which comprises a base, a coil soldering lug, an electromagnetic component and a contact component, the coil soldering lug penetrates through the base and is led out, the electromagnetic component and the contact component are fixed on the base, a coil leading-out wire of a coil is directly wound on the coil soldering lug, and notches are arranged on two sides of a bending part of a yoke. The end, close to the yoke, of the coil frame comprises a first vertical partition plate and two second vertical partition plates formed by extending from the two sides of the first vertical partition plate, and the two second vertical partition plates are located on the two sides of a vertical plate of the yoke respectively. No coil contact pin is arranged on the coil rack, so that the coil rack is simple in structure, two supporting legs of the yoke are removed, and a large notch is formed in the bent part of the yoke, so that an enough distance is formed between the yoke and a coil outgoing line; therefore, it is ensured that the coil outgoing line is directly wound on the coil soldering lug, the electrical gap between the yoke and the coil is not affected, and it is ensured that the problem of high-voltage breakdown does not exist.

Description

Technical Field

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

[0002] Existing relays usually install coil pins for fixing the coil lead wires on the coil frame, so that the coil lead wires can be wrapped around the coil pins and fixed, which can ensure that the electrical gap between the coil and the yoke will not be changed by the coil lead wires. After the coil lead wires are fixed on the coil pins, the coil pins need to be welded to the coil welding pieces on the base, which makes the coil frame have coil pin mounting holes, resulting in a complex coil frame structure and a corresponding increase in the manufacturing cost of the coil frame. The coil lead wires are first wrapped around the coil pins, and then the coil pins are welded to the coil welding pieces, which complicates the manufacturing process of the relay, and there are problems such as loose welding between the coil pins and the coil welding pieces, and the risk of burning the coil frame and the base during the welding process. In order to solve this problem, our researchers are developing a relay with a coil frame without coil pins. The coil lead wires are directly wrapped around the coil welding piece on the base, which makes the coil frame structure simple and omits the welding step. However, since the yoke has two supporting feet plugged into the base, and the two supporting feet on the yoke are the parts closest to the coil lead wires and with the smallest electrical gap, the coil frame is not equipped with coil pins due to structural reasons. Therefore, the lead wires at both ends of the coil must be straightened and wrapped around the welding piece terminals on the base during assembly. If they are not straightened, the electrical gap between the lead wires and the yoke support feet will easily become smaller, thereby causing high voltage breakdown. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a relay which simplifies the coil frame structure, simplifies the relay assembly steps, and has good high-voltage breakdown resistance performance.

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

[0005] A relay comprises a base, a coil welding piece passing through the base and leading out, and an electromagnetic assembly and a contact assembly fixed on the base, wherein the electromagnetic assembly comprises a yoke, an armature, an iron core, a coil frame and a coil wound on the coil frame, the coil lead wire of the coil is directly wound on the coil welding piece, the yoke comprises a horizontal plate parallel to the base and fixed on the base and a vertical plate connected to the horizontal plate through a bending part, notches are arranged on both sides of the bending part of the yoke, and the end of the coil frame close to the yoke comprises a first vertical partition and two second vertical partitions extending from both sides of the first vertical partition, the first vertical partition is parallel to the vertical plate of the yoke, the two second vertical partitions are perpendicular to the first vertical partition and are respectively located on both sides of the vertical plate of the yoke, and the second vertical partition extends at least to the upper edge of the notch on the same side.

[0006] In one embodiment, the lower ends of both sides of the vertical plates of the yoke are inclined inward from top to bottom, and the inclined surface extends to the notch at the bent portion.

[0007] In one embodiment, the second vertical partition protrudes inwardly at a position corresponding to the inclined surface to form a protrusion matching the inclined surface, and a concave-convex structure is provided on a side of the protrusion away from the inclined surface.

[0008] In one embodiment, the electromagnetic assembly further includes a coil sheath, which cooperates with the first vertical partition to form a space for accommodating the coil wound on the coil frame, and the coil lead wire passes through the gap between the coil sheath and the first vertical partition.

[0009] In one embodiment, a through hole for fixing the coil lead wire is provided on the top of the coil welding sheet.

[0010] The utility model has the following beneficial effects:

[0011] 1. The coil pin is not provided on the coil frame, which makes the coil frame structure simple. The two supporting feet of the yoke are removed, and a larger gap is formed at the bending part of the yoke, so that there is a sufficient distance between the yoke and the coil lead wire, thereby ensuring that the coil lead wire is directly wound on the coil welding piece and the electrical gap between the yoke and the coil is not affected, ensuring that there will be no high-voltage breakdown problem.

[0012] 2. The first vertical partition and the two second vertical partitions form a semi-enclosure for the vertical plate of the yoke, ensuring that the vertical plate of the yoke is isolated from the coil, increasing the creepage distance, and further preventing high voltage breakdown.

[0013] 3. The protrusion and concave-convex structure of the second vertical partition are conducive to increasing the creepage distance between the coil lead wire and the yoke. The protrusion also blocks the coil lead wire to prevent its position from changing and approaching the yoke.

[0014] 4. The portion of the coil other than the coil lead wire is shielded by the coil sheath and the first vertical partition plate, and is completely isolated from the yoke, further improving the pressure resistance between the coil and the yoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of a relay according to an embodiment of the utility model;

[0016] Figure 2 yes Figure 1 The structural diagram of the yoke in FIG.

[0017] Figure 3 This is a view of the coil lead wires passing between the coil sheath and the coil former. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] 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.

[0020] like Figure 1 to Figure 2As shown, a relay includes a base 1, a coil welding piece 2 passing through the base 1 and leading out, and an electromagnetic assembly and a contact assembly fixed on the base 1, wherein the electromagnetic assembly includes a yoke 3, an armature 4, an iron core, a coil frame 5, a reset spring 6, and a coil wound on the coil frame 5, wherein the yoke 3 includes a horizontal plate 31 parallel to the base 1 and fixed on the base 1, and a vertical plate 32 connected to the horizontal plate 31 through a bending portion (the yoke 3 shown in this embodiment is a U-shaped yoke 3, and in other embodiments, an L-shaped yoke 3 can also be used), and the contact assembly includes a static contact piece 9 passing through the base 1 and a moving contact piece 8 connected to the armature 4, the magnetic force generated by the coil being energized will cause the armature 4 to perform mechanical movement, thereby causing the moving contact to contact the static contact, and when the coil is de-energized, the reset spring 6 drives the armature 4 to reset, and the moving contact is separated from the static contact. The coil lead wire 7 is directly wound around the coil welding sheet 2, and notches 33 are set on both sides of the bending part of the yoke 3. The coil frame 5 includes a first vertical partition 51 and two second vertical partitions 52 extending from both sides of the first vertical partition 51 at one end close to the yoke 3. The first vertical partition 51 is parallel to the vertical plate 32 of the yoke 3, and the two second vertical partitions 52 are perpendicular to the first vertical partition 51 and are respectively located on both sides of the vertical plate 32 of the yoke 3. The second vertical partition 52 at least extends to the upper edge of the notch 33 on the same side. In the relay of this embodiment, no coil pin is set on the coil frame 5, so that the structure of the coil frame 5 is simple, the two supporting feet of the yoke 3 are removed, and a larger notch 33 is formed at the bending part of the yoke 3, so that there is a sufficient distance between the yoke 3 and the coil lead wire 7, so as to ensure that the coil lead wire 7 is directly wound around the coil welding sheet 2 and the electrical clearance between the yoke 3 and the coil is not affected, ensuring that there will be no high voltage breakdown problem. The first vertical partition 51 and the two second vertical partitions 52 form a semi-enclosure around the vertical plate 32 of the yoke 3, ensuring that the vertical plate 32 of the yoke 3 is isolated from the coil, increasing the creepage distance, and preventing high-voltage breakdown. The bending part of the yoke 3 is provided with a notch 33 to ensure the electrical clearance with the coil lead wire 7, and the vertical plate 32 of the yoke 3 is isolated from the coil lead wire 7 by the second vertical partition 52, that is, the notch 33 and the second vertical partition 52 cooperate to further ensure that there is sufficient electrical clearance between the yoke 3 and the coil lead wire 7, improve the pressure resistance performance, and ensure the feasibility of directly connecting the coil lead wire 7 to the coil welding piece 2.

[0021] Among them, the lower ends of both sides of the vertical plate 32 of the yoke 3 are inclined inward from top to bottom, and the inclined surface 34 extends to the notch 33 of the bending part, that is, the width of the relative part of the yoke 3 and the coil lead wire 7 is reduced, so that there is a sufficient distance between the yoke 3 and the coil lead wire 7, avoiding the problem of smaller electrical gap caused by the position change of the coil lead wire 7 or failure to straighten it.

[0022] As a preferred design, the second vertical partition 52 protrudes inward at a position corresponding to the inclined surface 34 to form a protrusion 53 matching the inclined surface 34. A concave-convex structure 54 is provided on the side of the protrusion 53 away from the inclined surface 34. The protrusion 53 and the concave-convex structure 54 are beneficial to increasing the creepage distance between the coil lead wire 7 and the yoke 3. The protrusion 53 also forms a barrier to the coil lead wire 7 to prevent its position from changing and approaching the yoke 3.

[0023] The electromagnetic assembly further comprises a coil sheath 10, which cooperates with the first vertical partition 51 to form a space for accommodating the coil wound on the coil frame 5. Figure 3 The coil lead wire 7 passes through the gap between the coil sheath 10 and the first vertical partition 51 and is directly connected to the coil welding piece 2. The part of the coil except the coil lead wire 7 is shielded by the coil sheath 10 and the first vertical partition 51, and is completely isolated from the yoke 3, thereby further improving the pressure resistance between the coil and the yoke 3.

[0024] The top of the coil welding sheet is provided with a through hole for fixing the coil lead wire, and the coil lead wire 7 passes through the through hole and is tied to the edge of the through hole.

[0025] 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, comprising a base, a coil welding piece passing through the base and leading out, and an electromagnetic assembly and a contact assembly fixed on the base, wherein the electromagnetic assembly comprises a yoke, an armature, an iron core, a coil frame, and a coil wound on the coil frame, characterized in that: The coil lead wire of the coil is directly wound around the coil welding sheet, the yoke includes a horizontal plate parallel to the base and fixed on the base and a vertical plate connected to the horizontal plate through a bending part, notches are arranged on both sides of the bending part of the yoke, the end of the coil frame close to the yoke includes a first vertical partition and two second vertical partitions extending from both sides of the first vertical partition, the first vertical partition is parallel to the vertical plate of the yoke, the two second vertical partitions are perpendicular to the first vertical partition and are respectively located on both sides of the vertical plate of the yoke, and the second vertical partition extends at least to the upper edge of the notch on the same side.

2. The relay according to claim 1, characterized in that: The lower ends of the vertical plates on both sides of the yoke iron are inclined inward from top to bottom, and the inclined surface extends to the notch at the bent part.

3. The relay according to claim 2, characterized in that: The second vertical partition plate protrudes inwardly at a position corresponding to the inclined surface to form a protruding portion matching the inclined surface, and a concave-convex structure is provided on a side of the protruding portion away from the inclined surface.

4. The relay according to claim 1, characterized in that: The electromagnetic assembly also includes a coil sheath, which cooperates with the first vertical partition to form a space for accommodating the coil wound on the coil frame, and the coil lead wire passes through the gap between the coil sheath and the first vertical partition.

5. The relay according to claim 1, characterized in that: The top of the coil welding sheet is provided with a through hole for fixing the coil lead wire.

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