Coil assembly of relay and relay

Abstract

The invention discloses a coil assembly of a relay and the relay, the coil assembly comprises a coil rack, an enameled wire wound on the coil rack and a coil pin, the coil pin comprises a pin main body, a pin bending part and a winding supporting part, the pin bending part is located between the winding supporting part and the pin main body, and the winding supporting part is located between the winding supporting part and the pin main body. The clamping tooth structure and the boss structure are formed on the winding supporting part, the boss structure is closer to one end of the pin bending part than the clamping tooth structure, the winding end of the enameled wire is wound on the winding supporting part through the clamping tooth structure and the boss structure, positioning of the winding end of the enameled wire is facilitated, winding is faster and more stable, and the winding efficiency is improved. According to the technical scheme of the utility model, the winding end of the enameled wire is more uniformly stressed in all directions, and when the winding support part is bent, the winding end of the enameled wire can be effectively prevented from being cut, crushed and broken, so that the safety risk is reduced, and the working stability of the relay is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular to a relay coil assembly and a relay. Background Art

[0002] A relay is an electronic control device with 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, effectively acting as an "automatic switch" that uses a smaller current to control a larger one. Therefore, it performs functions such as automatic regulation, safety protection, and circuit switching within circuits. High-voltage DC relays are capable of handling high power. Even under harsh conditions such as high voltage and high current, they offer unmatched reliability and a long service life compared to conventional relays. They are widely used in various fields, such as new energy vehicles.

[0003] Failure of an onboard relay during driving can cause a major accident. Relays have a short lifespan, and frequent replacement can degrade the user experience. With the development of new energy vehicles, more comprehensive and higher standards and requirements for the safety and reliability of high-voltage DC relays are being imposed. Generally speaking, these high-voltage DC relays used in new energy vehicles and other applications must ensure reliable coil engagement over a long lifespan.

[0004] See Figure 17-22 , is an existing high-voltage DC relay, the coil assembly thereon includes a coil frame 1' and an enameled wire 2' wound on the coil frame 1', and the winding end of the enameled wire 2' is wound on the winding support part 31' of the coil pin 3'. However, since the two sides of the winding support part 31' are mostly straight-edge structures, the winding end of the enameled wire 2' is not fast and stable when winding on the winding support part 31', the enameled wire cannot be stably limited, and there is a lot of slack. The enameled wire is easy to fall between the winding end and the plastic baffle plate of the coil frame 1' and be squeezed. When the winding support part 31' is bent, the enameled wire 2' is easy to move along the straight edge. Since the straight edge structure is relatively sharp and the contact force surface with the winding end is narrow, the winding end of the enameled wire 2' is easy to be cut, crushed, or broken, posing a large safety risk and affecting the stable operation of the relay. Summary of the Invention

[0005] The present invention aims to provide a coil assembly of a relay to solve the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a coil assembly of a relay, including a coil frame, an enameled wire wound on the coil frame and a coil pin, the coil pin including a pin body, a pin bending portion and a winding support portion, the pin bending portion is located between the winding support portion and the pin body, a tooth structure and a boss structure are formed on the winding support portion, and the boss structure is closer to one end of the pin bending portion than the tooth structure, and the winding end of the enameled wire is wound on the winding support portion through the tooth structure and the boss structure.

[0007] Preferably, the coil pin and the coil frame are integrally injection-molded, the coil frame covers the pin body, and the pin bending portion and the winding support portion are exposed on the coil frame.

[0008] Preferably, the tooth structure includes convex tooth portions and arc-surface groove portions alternately distributed along the length direction.

[0009] Preferably, the length of the arcuate slot portion at one end away from the boss structure is greater than the length of the arcuate slot portion at one end close to the boss structure, and the arcuate slot portion at the longer end is the winding starting position or the winding ending end.

[0010] Preferably, the latching tooth structure or the boss structure is symmetrically arranged on both sides of the length direction of the winding support portion.

[0011] Preferably, the width of the pin bending portion is smaller than the width of the winding support portion.

[0012] Preferably, the end of the boss structure close to the pin bending portion is a root, and the end away from the pin bending portion is a head, and the width of the head of the boss structure is greater than the width of the root.

[0013] Preferably, the end of the boss structure close to the pin bending portion is the root, and the end away from the pin bending portion is the head. The width of the head of the boss structure is greater than the outer diameter of the enameled wire.

[0014] Preferably, the boss structure is in the shape of a right-angled trapezoid, and the width of the boss structure gradually decreases from the head toward the root.

[0015] Preferably, both ends of the coil pin are exposed from the coil frame respectively, the winding support portion is located at one end of the coil pin, and the other end of the coil pin is used to connect to an external circuit.

[0016] Preferably, the coil frame includes a winding post and a first baffle plate and a second baffle plate respectively located at both ends of the winding post. The enameled wire is wound outside the winding post, and the first baffle plate and the second baffle plate are respectively perpendicular to the axial direction of the winding post.

[0017] Preferably, the coil pin is located in the second baffle plate, an L-shaped stepped groove is formed above one side of the edge of the second baffle plate, and the winding support portion corresponds to the L-shaped stepped groove.

[0018] Preferably, the L-shaped stepped groove includes a vertical surface and a horizontal surface perpendicular to each other, and in an initial state, the thickness surface of one side of the boss structure is flush with the horizontal surface of the L-shaped stepped groove.

[0019] Preferably, the L-shaped stepped groove includes a vertical surface and a horizontal surface perpendicular to each other, and in the bent state, the thickness surface of one side of the boss structure is flush with the vertical surface of the L-shaped stepped groove.

[0020] Preferably, the end surface of the boss structure facing one end of the latching tooth structure is a slope structure with a higher outer side and a lower inner side, or a stop convex burl is provided on the outer side of the end surface of the boss structure facing one end of the latching tooth structure.

[0021] The present invention also provides a relay, comprising a coil assembly of any of the above-mentioned relays.

[0022] The present invention has the following beneficial effects:

[0023] The present invention includes a coil frame, an enameled wire wound on the coil frame, and a coil pin, the coil pin including a pin body, a pin bending portion, and a winding support portion, the pin bending portion being located between the winding support portion and the pin body, a tooth structure and a boss structure being formed on the winding support portion, and the boss structure is closer to one end of the pin bending portion than the tooth structure, the winding end of the enameled wire is wound on the winding support portion through the tooth structure and the boss structure, the structural arrangement increases the contact force surface between the winding end of the enameled wire and the winding support portion, the winding stability is higher, and the positioning of the winding end of the enameled wire is convenient, orderly winding is realized, and the winding is faster and more convenient, and the downward displacement of the enameled wire can be limited during the winding process, the slack amount after bending is reduced, the enameled wire is avoided from being thrown, broken by vibration and friction, and the force on the winding end of the enameled wire in all directions is more dispersed and balanced, and when the winding support portion is bent, the winding end of the enameled wire can be effectively prevented from being cut, crushed, or broken, thereby reducing the safety risk and ensuring the working stability of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an axonometric view of the coil assembly according to embodiment 1 of the present invention, with the winding support portion in a state before bending;

[0025] Figure 2 is a top view of the coil assembly according to embodiment 1 of the present invention, with the winding support portion in a state before being bent;

[0026] Figure 3 is an axonometric view of the coil assembly according to embodiment 1 of the present invention, with the winding support portion in a bent state (I);

[0027] Figure 4 It is a top view of the coil assembly of embodiment 1 of the present invention, with the winding support portion in a bent state;

[0028] Figure 5 This is an axonometric view of the coil assembly according to embodiment 1 of the present invention, with the winding support portion in a bent state (second);

[0029] Figure 6 It is an axonometric view of the coil assembly according to embodiment 1 of the present invention, with the winding support portion in a bent state;

[0030] Figure 7 is a top view of the coil assembly according to embodiment 1 of the present invention, with the winding support portion in a bent state;

[0031] Figure 8 yes Figure 7 Cross-sectional view at AA in the middle;

[0032] Figure 9 is a top view of a winding support portion of a coil assembly according to embodiment 1 of the present invention;

[0033] Figure 10 is a side view of the winding support portion of the coil assembly according to embodiment 1 of the present invention when the winding is bent;

[0034] Figure 11 is an isometric view of the winding support portion of the coil assembly of Example 1 of the present invention during initial winding;

[0035] Figure 12 1 is an exploded diagram of a relay according to embodiment 1 of the present invention;

[0036] Figure 13 1 is a longitudinal sectional view of the relay according to embodiment 1 of the present invention (I);

[0037] Figure 14 2 is a longitudinal sectional view of the relay according to embodiment 1 of the present invention;

[0038] Figure 15 is a top view of a winding support portion of a coil assembly according to embodiment 2 of the present invention;

[0039] Figure 16 is a top view of a winding support portion of a coil assembly according to embodiment 3 of the present invention;

[0040] Figure 17 Schematic diagram of the winding support portion of the coil assembly of the prior art when bent (I);

[0041] Figure 18 Schematic diagram of the winding support portion of the coil assembly of the prior art when bent (II);

[0042] Figure 19 This is a schematic diagram of the winding support portion of the coil assembly of the prior art after being bent;

[0043] Figure 20 is a side view of a coil assembly of the prior art;

[0044] Figure 21 yes Figure 20 Cross-sectional view at the middle BB;

[0045] Figure 22 It is a side view of the winding support portion of the prior art after the winding is bent.

[0046] Figure annotation:

[0047] Parts of the present invention: 1 winding post, 2 first baffle plate, 3 second baffle plate, 4 enameled wire, 5 coil pin, 51 winding support portion, 52 pin bending portion, 6 convex tooth portion, 7 arc surface slot portion, 8 boss structure, 81 stop convex bud, 9 L-shaped stepped groove, 10 pin accommodating groove, 11 first housing, 12 second housing, 13 static contact assembly, 14 pushing assembly;

[0048] Existing technical parts: 1' coil frame, 2' enameled wire, 3' coil pin, 31' winding support part. DETAILED DESCRIPTION

[0049] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the present disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, one of ordinary skill in the art will understand other possible implementations and the advantages of the present invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0050] Example 1.

[0051] See Figure 1-14As shown, as an embodiment of the present invention, a coil assembly of a relay is provided, comprising a coil frame, an enameled wire 4 wound on the coil frame, and a coil pin 5, wherein the coil pin 5 comprises a pin body, a pin bending portion, and a winding support portion 51, wherein the pin bending portion is located between the winding support portion and the pin body, and a latching structure and a boss structure 8 are formed on the winding support portion 51, and the boss structure 8 is closer to one end of the pin body than the latching structure, and the winding end of the enameled wire 4 is wound on the winding support portion 51 through the latching structure and the boss structure 8, and this structural arrangement increases the contact force surface between the winding end of the enameled wire 4 and the winding support portion 51, and the winding stability is higher, and when the winding support portion 51 is bent, It can drive the winding end of the enameled wire 4 to move together, so that the two remain in a relatively static state, thereby ensuring that after bending, the winding end of the enameled wire 4 is still stably wound and mounted on the winding support part 51, and it is convenient to position the winding end of the enameled wire 4, and the winding is faster and more convenient. During the winding process, the downward displacement of the enameled wire 4 can be limited, and the slack after bending can be reduced, thereby avoiding the enameled wire 4 from being thrown, damaged by vibration and friction, and breaking. The force on the winding end of the enameled wire 4 in all directions is more dispersed and balanced. When the winding support part 51 is bent, the winding end of the enameled wire 4 can be effectively prevented from being cut, crushed, or broken, thereby reducing safety risks and ensuring the working stability of the relay.

[0052] In this embodiment, the coil pin 5 and the coil frame are integrally injection-molded. The coil frame covers the pin body, and the pin bending portion 52 and the winding support portion 51 are exposed from the coil frame.

[0053] See Figure 9 As shown, in this embodiment, the tooth structure includes a convex tooth portion 6 and an arc-shaped groove portion 7 that are alternately distributed along the length direction. The tooth structure or boss structure 8 is symmetrically arranged on both sides of the length direction of the winding support portion 51. This ensures the winding stability of the winding end of the enameled wire 4 on the winding support portion 51, and the arc-shaped groove portion 7 is relatively smooth, which can further ensure that the pressure formed by the winding end at the arc-shaped groove portion 7 can be more evenly distributed, preventing it from excessive deformation and damage, thereby further improving the protection effect. In addition, the length of the arc-shaped groove portion 7 away from the end of the boss structure 8 is greater than the length of the arc-shaped groove portion 7 close to the end of the boss structure 8. The arc-shaped groove portion 7 at the longer end is the starting position or the ending point of the winding, which can wind more and denser enameled wire 4, avoiding the displacement of the enameled wire 4 caused by the winding tension during the winding process due to insufficient number of winding coils, thereby improving the stability of the winding.

[0054] Of course, in other cases, it is also possible that the latching tooth structure or the boss structure is only formed on one side of the winding support portion 51 .

[0055] In this embodiment, the width of the pin bending portion 52 is smaller than the width of the winding support portion 51, so that the strength of the winding support portion 51 is large and the strength of the pin bending portion 52 is small. The bending deformation is concentrated in the pin bending portion 52, away from the winding area of the winding support portion 51, avoiding the enameled wire 4 wound at the winding support portion 51 from being crushed or broken due to deformation and extrusion of the winding support portion 51, while ensuring the supporting strength and stability of the winding support portion 51 for the enameled wire 4.

[0056] In this embodiment, the end of the boss structure 8 close to the pin bending portion 52 is the root, and the end away from the pin bending portion 52 is the head. The width of the head of the boss structure 8 is greater than the width of the root, so that the transition between the pin bending portion 52 and the winding support portion 51 is relatively smooth, and no right-angle transition occurs during stamping, thereby preventing large stamping stress from causing cracking and deformation of the pin bending portion 52.

[0057] Specifically, the boss structure 8 is a right-angled trapezoid, and the width of the boss structure 8 gradually decreases from the head toward the root, which prevents the winding end of the enameled wire 4 from sliding when the winding support part 51 is bent, thereby ensuring the winding stability. At the same time, compared with the situation where the width of the head of the boss structure 8 is the same as the width of the root, this structure uses less material and saves costs. The transition between the width of the head of the boss structure 8 and the root is relatively smooth, and there will be no right-angle transition during stamping, which prevents large stamping stress from causing cracking and deformation of the pin bending part 52.

[0058] In this embodiment, the width of the head of the boss structure 8 is greater than the outer diameter of the enameled wire 4, that is, the width of the right-angled side of the boss structure 8 is greater than the outer diameter of the enameled wire 4, ensuring that the winding end of the enameled wire 4 can form a stable abutment support on the boss structure 8 to prevent the winding end of the enameled wire 4 from sliding.

[0059] Of course, in other cases, the boss structure may also be in the form of a right triangle, and the width of the boss structure gradually decreases from the head toward the root.

[0060] In this embodiment, both ends of the coil pin 5 are exposed from the coil frame, the winding support portion 51 is located at one end of the coil pin 5 , and the other end of the coil pin 5 is used to connect to an external circuit.

[0061] In this embodiment, the coil frame is a plastic coil frame, which includes a winding post 1 and a first baffle plate 2 and a second baffle plate 3 located at both ends of the winding post 1. The enameled wire 4 is wound around the winding post 1. The first baffle plate 2 and the second baffle plate 3 are perpendicular to the axial direction of the winding post 1. Figure 3As shown in the direction of the middle arrow, the layout direction of the coil pin 5 is the front-to-back direction, the axial direction of the winding column 1 is the up-down direction, and the direction perpendicular to the front-to-back and up-down directions is the left-to-right direction. The tooth structure is respectively located on the left and right sides of the winding support part 51, which is convenient for observation and facilitates the rapid winding of the winding end of the enameled wire 4.

[0062] In this embodiment, the coil pin 5 is located in the second baffle plate 3, and an L-shaped stepped groove 9 is formed above one side of the edge of the second baffle plate 3. The winding support part 51 is bent toward the first baffle plate 2 at the L-shaped stepped groove 9. The winding end of the enameled wire 4 is supported by the second baffle plate 3 during winding to prevent the winding end from being deformed or shaking due to the winding tension. At the same time, the L-shaped stepped groove 9 provides a clearance space for the bending direction of the winding support part 51, which can realize the bending and straightening of the winding end, which is conducive to the miniaturization of the structure. The L-shaped stepped groove 9 can also block and limit the bending angle of the winding support part 51 to prevent the winding angle from exceeding the set range.

[0063] See Figure 1 As shown, in this embodiment, the L-shaped stepped groove 9 includes a vertical surface and a horizontal surface perpendicular to each other. The horizontal surface has a coil pin accommodating groove 10. The upper part of the accommodating groove has a movable space for realizing bending and straightening of the winding end. The thickness of the boss structure is the same as the thickness of the accommodating groove. In the initial state, the thickness surface of the top side of the boss structure is flush with the horizontal surface of the L-shaped stepped groove 9. After straightening, the enameled wire 4 follows the movement of the boss structure to avoid pinching and wire breakage, thereby improving the reliability of the coil; that is, the support surface and material thickness surface of the boss structure are flush with the second baffle plate 3 of the plastic coil frame, thereby strengthening the strength of the winding support part 51, preventing deformation and shaking during winding, and realizing straightening at the same time, which is conducive to the miniaturization of the structure. In addition, refer to Figure 6 As shown, in the bent state, the thickness surface of the top side of the boss structure is flush with the vertical surface of the L-shaped stepped groove 9, ensuring that the slack of the enameled wire 4 is reduced after straightening, solving the problem of the enameled wire 4 being easily thrown and broken due to vibration friction.

[0064] In this embodiment, the coil pins 5 and the coil pin accommodating grooves 10 are a corresponding number, and the multiple coil pins 5 are arranged side by side in the left and right directions in the second baffle plate 3. The winding ends of the enameled wire 4 include a positive winding end and a negative winding end. The multiple coil pins 5 are used for winding the positive winding end and the negative winding end.

[0065] The present invention also provides a relay, specifically a high-voltage DC relay, which includes the coil assembly and housing, static contact assembly 13, and pushing assembly 14 of the relay described in the above embodiment. The static contact assembly 13, pushing assembly 14, and coil assembly are assembled together inside the housing. The housing includes a first housing 11 and a second housing 12 that are sealed together. The relay has high safety and strong working stability.

[0066] Example 2: For the sake of brief description, this example mainly describes the differences from Example 1.

[0067] See Figure 15 As shown, as an embodiment of the present invention, a coil assembly of a relay is provided, in which the end surface of the boss structure 8 of the winding support portion 51 toward one end of the tooth structure is a slope structure with a high outside and a low inside, so that the outer side of the boss structure 8 has a stopping effect, further ensuring that the winding end of the enameled wire 4 can form a stable abutment support on the boss structure 8, preventing the winding end of the enameled wire 4 from loosely sliding.

[0068] Example 3: For the sake of brief description, this example mainly describes the differences from Example 1.

[0069] See Figure 16 As shown, as an embodiment of the present invention, a coil assembly of a relay is provided, in which the boss structure 8 of the winding support portion 51 is provided with a stop bulge 81 on the outer side of the end surface facing one end of the tooth structure, further ensuring that the winding end of the enameled wire 4 can form a stable abutment support on the boss structure 8, preventing the winding end of the enameled wire 4 from loosely sliding.

[0070] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the scope of protection of the present invention.

Claims

1. A coil assembly of a relay, characterized in that: It includes a coil frame, an enameled wire wound on the coil frame and a coil pin. The coil pin includes a pin body, a pin bending part and a winding support part. The pin bending part is located between the pin body and the winding support part. A tooth structure and a boss structure are formed on the winding support part. The boss structure is closer to one end of the pin bending part than the tooth structure. The winding end of the enameled wire is wound on the winding support part through the tooth structure and the boss structure.

2. The coil assembly of the relay according to claim 1, characterized in that: The coil pin and the coil frame are integrally injection molded, the coil frame covers the pin body, and the pin bending part and the winding support part are exposed on the coil frame.

3. The coil assembly of the relay according to claim 1, characterized in that: The latching tooth structure comprises convex tooth portions and arc-surface latching groove portions which are alternately distributed along the length direction.

4. The coil assembly of the relay according to claim 3, characterized in that: The length of the arcuate slot portion at one end away from the boss structure is greater than the length of the arcuate slot portion at one end close to the boss structure, and the arcuate slot portion at the longer end is the winding starting position or the winding ending end.

5. The coil assembly of the relay according to claim 1, characterized in that: The latching tooth structure or the boss structure is symmetrically arranged on both sides of the length direction of the winding support portion.

6. The coil assembly of the relay according to claim 1, characterized in that: The width of the pin bending portion is smaller than the width of the winding support portion.

7. The coil assembly of the relay according to claim 1, characterized in that: One end of the boss structure close to the pin bending portion is a root, and one end away from the pin bending portion is a head. The width of the head of the boss structure is greater than the width of the root.

8. The coil assembly of the relay according to claim 1, characterized in that: The end of the boss structure close to the pin bending portion is the root, and the end away from the pin bending portion is the head. The width of the head of the boss structure is greater than the outer diameter of the enameled wire.

9. The coil assembly of the relay according to claim 7, characterized in that: The boss structure is in a right-angled trapezoid shape, and the width of the boss structure gradually decreases from the head toward the root.

10. The coil assembly of the relay according to claim 1, characterized in that: Both ends of the coil pin are exposed on the coil frame respectively, the winding support portion is located at one end of the coil pin, and the other end of the coil pin is used to connect to an external circuit.

11. The coil assembly of a relay according to claim 1, characterized in that: The coil frame includes a winding post and a first baffle plate and a second baffle plate located at both ends of the winding post. The enameled wire is wound outside the winding post. The first baffle plate and the second baffle plate are perpendicular to the axial direction of the winding post.

12. The coil assembly of the relay according to claim 11, characterized in that: The coil pin is located in the second baffle plate. An L-shaped stepped groove is formed above one side of the edge of the second baffle plate, and the winding support portion corresponds to the L-shaped stepped groove.

13. The coil assembly of the relay according to claim 12, characterized in that: The L-shaped stepped groove includes a vertical surface and a horizontal surface perpendicular to each other. In an initial state, the thickness surface of one side of the boss structure is flush with the horizontal surface of the L-shaped stepped groove.

14. The coil assembly of the relay according to claim 12, characterized in that: The L-shaped stepped groove includes a vertical surface and a horizontal surface perpendicular to each other. In the bent state, the thickness surface of one side of the boss structure is flush with the vertical surface of the L-shaped stepped groove.

15. The coil assembly of the relay according to claim 1, characterized in that: The end surface of the boss structure facing one end of the latching tooth structure is a slope structure with a high outside and a low inside, or a stop convex burl is provided on the outer side of the end surface of the boss structure facing one end of the latching tooth structure.

16. A relay, characterized in that: A coil assembly comprising a relay according to any one of claims 1 to 15.

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