Coil rack and electromagnetic relay

Abstract

The utility model discloses a coil rack and an electromagnetic relay, the coil rack comprises a winding part and two flange parts which are oppositely arranged, the winding part is arranged between the two flange parts, and the two flange parts respectively protrude outwards along the radial direction of the winding part; stop blocks are respectively arranged between the two flange parts and the winding part; and a winding window of an enameled wire is formed between the winding part and the stop blocks at the two ends of the winding part. According to the utility model, the creepage distance between the enamelled wire and the yoke and the creepage distance between the enamelled wire and the static reed can be improved, thereby improving the dielectric withstand voltage performance.

Description

Technical Field

[0001] This utility model relates to the field of relays, and in particular to a coil frame and an electromagnetic relay. Background Technology

[0002] An electromagnetic relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits. In fact, it is an "automatic switch" that uses a small current and a low voltage to control a large current and a high voltage.

[0003] like Figures 1-4 As shown, the existing miniature electromagnetic relay 10′ includes a coil frame 1′, a yoke 2′, an enameled wire 3′, a stationary spring 4′, and a moving spring 5′, etc. Due to the compact structure and small size of the product itself, the conventional arrangement of the coil frame 1′ results in a creepage distance between the enameled wire 3′ and the yoke 2′. Figure 3 (As shown by the thick solid line), and the creepage distance between the enameled wire 3′ and the stationary spring 4′ is relatively small ( Figure 4 (As shown by the thick solid line) This means that the creepage distance between the high-voltage end and the low-voltage end is small, resulting in poor insulation and making the product susceptible to high-voltage breakdown. To improve the insulation between the high-voltage end and the low-voltage end of the electromagnetic relay, it is generally necessary to increase the size of the relay, which will lead to increased costs and a larger relay size. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by providing a coil frame and an electromagnetic relay. By improving the structure of the coil frame, the creepage distance between the enameled wire and the yoke, as well as the creepage distance between the enameled wire and the stationary spring, is increased, thereby improving the dielectric withstand performance.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a coil frame, including a winding part and two flange parts arranged opposite to each other, the winding part is disposed between the two flange parts, and the two flange parts protrude outward along the radial direction of the winding part; a stop block is respectively provided between the two flange parts and the winding part, and a winding window for enameled wire is formed between the winding part and the stop blocks at its two ends.

[0006] Furthermore, the amount of the stop block protruding radially outward along the winding portion is less than the amount of the flange portion protruding radially outward along the winding portion.

[0007] Furthermore, the outer side of the stop block is provided with a groove.

[0008] Furthermore, there are multiple grooves distributed along the circumference of the stop block, and reinforcing ribs are provided between adjacent grooves. A groove extending along the circumference of the stop block is provided on the side of the stop block facing the yoke that mates with the outer side of the coil frame.

[0009] Furthermore, the groove has a dimension greater than 1 mm in the axial direction of the winding portion.

[0010] Furthermore, one of the blocks is provided with a guide ramp that extends to the adjacent flange for carrying the enameled wire.

[0011] This utility model also provides an electromagnetic relay, including a magnetic circuit part and a contact part. The magnetic circuit part includes a yoke and an iron core. The magnetic circuit part also includes a coil frame as described in any of the above claims. The winding part of the coil frame is wound with enameled wire. The iron core is inserted into the coil frame along the axial direction of the winding part. The yoke has an L-shaped structure, with one side located on one of the two flanges and connected to the iron core, and the other side located outside the winding window.

[0012] Furthermore, the coil frame is provided with a mounting hole extending axially along the winding portion, and the iron core is inserted into the mounting hole; one of the flange portions is provided with a slot, the slot extends radially along the winding portion and communicates with the mounting hole, and one side of the yoke is inserted into the slot and connected to the iron core.

[0013] Furthermore, the magnetic circuit portion also includes an armature, which is oscillatingly mounted on the blade edge on the other side of the yoke; the contact portion includes a stationary spring and a movable spring, one of the flanges being connected to a stationary spring support, the stationary spring being inserted into the stationary spring support and having a stationary contact; the movable spring is L-shaped, one side of the movable spring being fixed to the outer side of the other side of the yoke, the other side of the movable spring being fixed to the armature, and having a movable contact that cooperates with the stationary contact.

[0014] Furthermore, it also includes coil wrapping tape, which is adhered between the two flanges and covers the enameled wire and the stop.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The coil frame of this utility model is provided with blocks between the two flanges and the winding part, which can increase the creepage distance between the enameled wire and the yoke, as well as the creepage distance between the enameled wire and the stationary spring, thereby improving the dielectric withstand voltage performance. In addition, the blocks can also prevent the upper flange of the two flanges of the coil frame from being too thin and deformed by the enameled wire, and can also improve the problem of withstand voltage breakdown caused by the lower flange of the two flanges of the coil frame being too thin.

[0017] 2. The outer side of the stop block is provided with a groove to further increase the creepage distance, and reinforcing ribs are provided between adjacent grooves to increase the strength of the stop block and prevent the stop block from deforming.

[0018] 3. One of the blocks is provided with a guide ramp that extends to the adjacent flange for routing the enameled wire and to prevent the enameled wire from breaking due to suspension.

[0019] 4. The relay of this utility model also includes coil wrapping tape, which can increase the electrical clearance between the enameled wire and the yoke and stationary spring, thereby improving the withstand voltage of the coil load medium; at the same time, the coil wrapping tape sticks to the stop block, which can enhance the insulation.

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the coil frame and electromagnetic relay of the present invention are not limited to the embodiments. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a coil frame in the prior art;

[0022] Figure 2 This is a top view of an electromagnetic relay in the prior art;

[0023] Figure 3 yes Figure 2 A schematic diagram of the cross-section along AA;

[0024] Figure 4 yes Figure 2 A cross-sectional view along BB;

[0025] Figure 5 This is a three-dimensional structural diagram of the coil frame of this utility model;

[0026] Figure 6 This is a front view of the coil frame of this utility model;

[0027] Figure 7 This is a side view of the coil frame of this utility model;

[0028] Figure 8 This is a three-dimensional structural diagram of the electromagnetic relay of this utility model;

[0029] Figure 9 This is a top view of the electromagnetic relay of this utility model;

[0030] Figure 10 yes Figure 9 A cross-sectional view along CC;

[0031] Figure 11 yes Figure 9 A schematic diagram of the cross-section along DD;

[0032] In the diagram: 1. Coil frame; 11. Flange; 111. Slot; 12. Winding section; 13. Stop; 131. Groove; 1311. First groove wall; 1312. Second groove wall; 132. Reinforcing rib; 14. Winding window; 15. Guide ramp; 16. Mounting hole; 2. Yoke; 3. Enamelled wire; 4. Stationary spring; 41. Stationary contact; 5. Moving spring; 51. Moving contact; 6. Stationary spring support; 7. Armature; 8. Iron core; 10. Electromagnetic relay. Detailed Implementation

[0033] In this utility model, the terms "first," "second," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "inner," "outer," "top," and "bottom" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, and is only for the convenience of describing this utility model, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation on the scope of protection of this utility model. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Furthermore, in the description of this utility model, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. In the description of this utility model, unless otherwise explicitly specified and limited, terms such as "installed," "equipped with," "provided with," and "connected" should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Please see Figures 5-8 As shown, a coil frame of this utility model includes a winding portion 12 and two opposing flange portions 11. The winding portion 12 is disposed between the two flange portions 11, and the two flange portions 11 protrude outwards radially along the winding portion 12. A stop block 13 is provided between the two flange portions 11 and the winding portion 12, forming a winding window 14 for the enameled wire 3 between the winding portion 12 and the stop blocks 13 at both ends. The outward protrusion of the stop block 13 along the radial direction of the winding portion 12 is less than the outward protrusion of the flange portion 11 along the radial direction of the winding portion 12.

[0036] In this embodiment, the stop block 13 is cylindrical, and the stop block 13, flange portion 11, and winding portion 12 are integrally formed. A groove 131 is provided on the outer surface of the stop block 13. However, the structure of the stop block 13 is not limited to this. In other embodiments, the stop block, flange portion, and winding portion can be connected by splicing or embedding. The groove wall of the groove 131 near the winding window 14 is inclined towards the winding window 14, thereby further increasing the creepage distance. The groove wall of the groove 131 away from the winding window 14 is flush with the inner end face of the adjacent flange portion 11. However, the structure of the groove 131 is not limited to this. For ease of distinction, the groove wall of the groove 131 near the winding window 14 is named the first groove wall 1311, and the groove wall of the groove 131 away from the winding window 14 is named the second groove wall 1312. In other embodiments, the stop block can be of any shape or be a solid structure. The groove can be stepped or V-shaped, concave inward towards the axis of the winding portion.

[0037] There are multiple grooves 131, which are distributed around the circumference of the stop block 13. Reinforcing ribs 132 are provided between adjacent grooves 131 to increase the strength of the stop block 13 and prevent deformation of the stop block 13. A groove 131 extending around the circumference of the stop block 13 is provided on the side of the stop block 13 facing the yoke 2 that is fitted to the outside of the coil frame 1. That is, no reinforcing ribs are provided on the side of the stop block 13 facing the yoke 2.

[0038] Specifically, the groove 131 has a dimension greater than 1 mm in the axial direction of the winding portion 12.

[0039] One of the stops 13 is provided with a guide ramp 15, which extends to the adjacent flange 11 for carrying the enameled wire 3. Specifically, the guide ramp 15 is provided on the lower stop 13. There are two guide ramps 15, which are distributed side by side and located on opposite sides of the winding portion 12.

[0040] Please see Figures 8-11As shown, an electromagnetic relay of this utility model includes a magnetic circuit part and a contact part. The magnetic circuit part includes a yoke 2 and an iron core 8. The magnetic circuit part also includes a coil frame 1 as described above. The winding portion 12 of the coil frame 1 is wound with enameled wire 3. The iron core 8 is inserted into the coil frame 1 along the axial direction of the winding portion 12. The yoke 2 has an L-shaped structure, with one side located on one of the two flange portions 11 (i.e., Figure 8 The flange 11 located at the bottom is connected to the iron core 8, and the other side is located outside the winding window 14.

[0041] The coil frame 1 is provided with a mounting hole 16 extending axially along the winding portion 12, and the iron core 8 is inserted into the mounting hole 16. One of the flange portions 11 is provided with a slot 111, which extends radially along the winding portion 12 and communicates with the mounting hole 16. One side of the yoke 2 is inserted into the slot 111 and connected to the iron core 8.

[0042] The magnetic circuit also includes an armature 7, which is pivotally mounted on the blade edge on the other side of the yoke 2. The contact portion includes a stationary spring 4 and a movable spring 5, one of which has a flange 11 connected to a stationary spring support 6. The stationary spring 4 is inserted into the stationary spring support 6 and has a stationary contact 41. The movable spring 5 is L-shaped, with one side fixed to the outer side of the other side of the yoke 2 and the other side fixed to the armature 7, and has a movable contact 51 that mates with the stationary contact 41.

[0043] The electromagnetic relay 10 also includes coil wrapping tape (not shown in the figure), which is pasted around the periphery between the two flanges 11 and covers the enameled wire 3 and the stop block 13, thereby increasing the electrical clearance between the enameled wire 3 and the yoke 2 and the stationary spring 4, thereby increasing the withstand voltage of the load medium of the enameled wire 3. At the same time, the coil wrapping tape sticks to the stop block 13, which can enhance the insulation.

[0044] This utility model discloses an electromagnetic relay that, by setting blocks 13 between the two flange portions 11 and the winding portion 12 of the coil frame 1, can increase the creepage distance between the enameled wire 3 and the yoke 2, as well as the creepage distance between the enameled wire 3 and the stationary spring 4 (the creepage distance between the enameled wire 3 and the yoke 2 is as follows). Figure 10 As shown by the thick solid line, the creepage distance between the enameled wire 3 and the stationary spring 4 is as follows: Figure 11 (As shown by the thick solid line), thereby improving the dielectric pressure resistance performance. In addition, the stop block 13 can also prevent the upper flange 11 of the two flanges 11 of the coil frame 1 from being too thin and deformed by the enameled wire 3. It can also improve the problem of pressure breakdown of the lower flange 11 of the two flanges 11 of the coil frame 1 due to being too thin.

[0045] The electromagnetic relay of this utility model, regarding the structure and working principle of the coil frame, please refer to the preceding description, which will not be repeated here.

[0046] The present invention relates to a coil frame and an electromagnetic relay. The parts not described herein are the same as or can be implemented using existing technologies.

[0047] The above embodiments are only used to further illustrate a coil frame and electromagnetic relay of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A coil frame, comprising a winding portion and two opposing flange portions, the winding portion being disposed between the two flange portions, and the two flange portions respectively protruding outward along the radial direction of the winding portion; characterized in that: A stop block is provided between the two flange portions and the winding portion, and a winding window for the enameled wire is formed between the winding portion and the stop blocks at both ends.

2. The coil frame according to claim 1, characterized in that: The amount of the stop block protruding radially outward along the winding portion is less than the amount of the flange portion protruding radially outward along the winding portion.

3. The coil frame according to claim 1 or 2, characterized in that: The outer side of the stop block is provided with a groove.

4. The coil frame according to claim 3, characterized in that: The groove is multiple, and the multiple grooves are distributed along the circumference of the stop block. Reinforcing ribs are provided between adjacent grooves, and a groove extending along the circumference of the stop block is provided on the side of the stop block facing the yoke iron that mates with the outer side of the coil frame.

5. The coil frame according to claim 3, characterized in that: The groove has a dimension greater than 1 mm in the axial direction of the winding portion.

6. The coil frame according to claim 1, characterized in that: One of the blocks is provided with a guide ramp that extends to the adjacent flange for carrying enameled wire.

7. An electromagnetic relay, comprising a magnetic circuit portion and a contact portion, wherein the magnetic circuit portion comprises a yoke and an iron core, characterized in that, The magnetic circuit portion further includes a coil frame as described in any one of claims 1 to 6, wherein the winding portion of the coil frame is wound with enameled wire, the iron core is inserted into the coil frame along the axial direction of the winding portion, and the yoke is L-shaped, with one side located on one of the flanges of the two flanges and connected to the iron core, and the other side located outside the winding window.

8. The electromagnetic relay according to claim 7, characterized in that: The coil frame is provided with a mounting hole extending axially along the winding portion, and the iron core is inserted into the mounting hole; one of the flange portions is provided with a slot, the slot extends radially along the winding portion and communicates with the mounting hole, and one side of the yoke is inserted into the slot and connected to the iron core.

9. The electromagnetic relay according to claim 7, characterized in that: The magnetic circuit section also includes an armature, which is oscillatingly mounted on the blade edge on the other side of the yoke; the contact section includes a stationary spring and a movable spring, one of the flanges being connected to a stationary spring support, the stationary spring being inserted into the stationary spring support and having a stationary contact; the movable spring is L-shaped, one side of the movable spring being fixed to the outer side of the other side of the yoke, the other side of the movable spring being fixed to the armature, and having a movable contact that mates with the stationary contact.

10. The electromagnetic relay according to claim 7, characterized in that: It also includes coil wrapping tape, which is adhered between the two flanges and covers the enameled wire and the stop.

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