Coil component and electric valve

Abstract

Provided in the present application are a coil component and an electric valve. In this solution, a limiting structure is provided in the coil component, and at least part of the limiting structure is arranged at the junction of an insulating layer and a free segment, such that at least the side of the free segment close to the insulating layer can be limited and supported by the limiting structure. By means of this solution, the range of movement of the part (i.e. the free segment at the junction of the insulating layer and the free segment) of the free segment of a wire close to the insulating layer is restricted, that is, the range of movement of the part of the wire exposed from the insulating layer relative to the part of the wire fixed inside the insulating layer is restricted at least in one direction. This prevents large-angle bending and thus excessive stress concentration of the wire at the position where it exits the insulating layer at least in one direction, thereby reducing or avoiding the risk of bending damage or breakage of the wire at this position and improving product reliability.

Description

Coil components and electric valves

[0001] This application claims priority to the patent application filed on January 17, 2025, with China National Intellectual Property Administration, application number 2025201220337, entitled "Coil Components and Electric Valve". Technical Field

[0002] This application relates to the field of electric valve technology, and more specifically, to a coil component and an electric valve. Background Technology

[0003] The electric valve includes a coil component that generates a magnetic field to drive the valve core structure to move. The coil component consists of a coil body and a conductor. One end of the conductor is electrically connected to the coil body, and the other end is connected to a power supply line to supply power to the coil body. The electrical connection between the conductor and the coil body is sealed and insulated by an insulating layer formed by injection molding or potting. One end of the conductor is fixed within the insulating layer and cannot move, while the other end is exposed and can be bent. When the exposed conductor is bent under external force, stress concentration occurs at the connection point (where the conductor emerges from the insulating layer), making the conductor prone to bending, damage, or breakage at that location.

[0004] Application content

[0005] This application provides a coil component and an electric valve to solve the problem that the wires in the coil component are easily bent, damaged, or broken under external force.

[0006] To address the aforementioned problems, according to one aspect of this application, a coil component is provided, comprising a coil body, a conductor, an insulating layer, and a limiting structure. One end of the conductor is electrically connected to the coil body. The insulating layer at least covers the electrical connection between the conductor and the coil body. The portion of the conductor outside the insulating layer is a free segment. At least a portion of the limiting structure is located at the junction of the insulating layer and the free segment, thereby limiting at least the side of the free segment closest to the insulating layer.

[0007] Furthermore, the limiting structure includes a limiting part, at least a portion of which is located at the junction of the insulating layer and the free segment, and the limiting part limits at least the side of the free segment closest to the insulating layer.

[0008] Furthermore, at least part of the limiting part and the free section coincide along the axial direction of the limiting structure.

[0009] Furthermore, the limiting part is a circumferentially closed annular structure, the shape of the radial cross section of the limiting part matches the shape of the radial cross section of the free section, and the limiting part and the free section are fitted with a clearance.

[0010] Alternatively, the limiting part is a ring structure with a notch in the circumferential direction, the shape of the radial cross section of the limiting part matches the shape of the radial cross section of the free section, and the limiting part and the free section are in clearance fit; wherein, the conductor is a flat wire, the conductor has two opposite wide surfaces and two opposite narrow surfaces, the notch corresponds to one wide surface, and the width of the notch is less than the width of the wide surface; or the conductor is a round wire, and the width of the notch is less than the diameter of the conductor.

[0011] Alternatively, the limiting part has a limiting groove, the inner surface shape of the limiting groove matches the surface shape of the conductor, the opening width of the limiting groove is greater than or equal to the maximum radial dimension of the conductor, and the inner surface of the limiting groove limits at least two sides of the free segment.

[0012] Alternatively, the limiting part can be a plate-like structure, which limits one side of the free segment.

[0013] Furthermore, the end of the limiting part away from the insulating layer has an arc-shaped surface or a slope, which is used to contact the free segment that is bending.

[0014] Furthermore, the limiting structure includes a connecting part, which is connected to an insulating layer or coil body.

[0015] Furthermore, the limiting structure also includes a limiting part connected to the connecting part, at least a portion of which is located at the junction of the insulating layer and the free section, and the limiting part limits at least the side of the free section closest to the insulating layer; wherein the connecting part and the limiting part are an integral structure, and / or the connecting part and the insulating layer are an integral structure.

[0016] Furthermore, the connecting part includes a connecting sleeve, which is circumferentially closed or has an opening, and the connecting sleeve is fitted onto the insulating layer; or the connecting part is a shell-like structure with a mating groove, and a portion of the insulating layer is located within the mating groove.

[0017] Furthermore, the connecting part and the insulating layer are snapped together, or the connecting part and the insulating layer are riveted together, or the connecting part and the insulating layer are welded together, or the connecting part and the insulating layer are bonded together, or the connecting part and the insulating layer are inserted together.

[0018] Furthermore, the connecting part includes a connecting sleeve and a first snap-fit ​​structure disposed on the connecting sleeve, the outer wall of the insulating layer has a second snap-fit ​​structure, the connecting sleeve is sleeved on the insulating layer, and the first snap-fit ​​structure and the second snap-fit ​​structure snap-fit ​​together.

[0019] Furthermore, one of the first and second snap-fit ​​structures includes a snap-fit ​​hole or a snap-fit ​​slot, and the other of the first and second snap-fit ​​structures includes a snap-fit ​​block, which snaps into the snap-fit ​​hole or snap-fit ​​slot; or,

[0020] One of the first and second snap-fit ​​structures includes a hook, and the other of the first and second snap-fit ​​structures includes a block, which snaps into the hook.

[0021] Furthermore, the sidewall of the connecting sleeve has a clearance groove, the end of the first snap-fit ​​structure is connected to the bottom wall of the clearance groove, and the sidewalls of the first snap-fit ​​structure and the clearance groove are spaced apart; and / or,

[0022] The second snap-fit ​​structure has a guide surface for guiding the elastic deformation of the first snap-fit ​​structure during the snap-fit ​​operation; and / or,

[0023] There are at least two first-clamping structures, and at least two first-clamping structures engage with the same second-clamping structure; and / or...

[0024] There are multiple first and second snap-fit ​​structures, and each first snap-fit ​​structure is engaged with one second snap-fit ​​structure.

[0025] Furthermore, the connecting part has a mating hole, and the outer wall of the insulating layer has a riveting post. The riveting post passes through the mating hole, and the end of the riveting post is riveted to the outer surface of the connecting part.

[0026] Furthermore, the connecting part has a welding rib on the side facing the insulation layer, or the insulation layer has a welding rib on the side facing the connecting part, and the connecting part and the insulation layer are welded together by the welding rib.

[0027] Another aspect of this application provides an electric valve, which includes a valve body and the aforementioned coil component, the coil component being mounted on the valve body.

[0028] This design incorporates a limiting structure within the coil component, with at least a portion of the limiting structure positioned at the interface between the insulation layer and the free segment. This limiting structure effectively restricts and supports at least the side of the free segment closest to the insulation layer. By defining the range of motion of the portion of the free segment near the insulation layer (i.e., at the interface between the insulation layer and the free segment), this design limits the range of motion of the portion of the conductor exposed within the insulation layer relative to the portion fixed within the insulation layer. This prevents, at least in one direction, large-angle bends at the point where the conductor exits the insulation layer, thus avoiding significant stress concentration and reducing or eliminating the risk of bending, breakage, or fracture at that location, thereby improving product reliability. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 shows a schematic diagram of the structure of the coil component provided in Embodiment 1 of this application;

[0031] Figure 2 shows a schematic diagram of the limiting structure in Figure 1;

[0032] Figure 3 shows a schematic diagram of the coil component in Figure 1 without the limiting structure;

[0033] Figure 4 shows a schematic diagram of the structure of the coil component provided in Embodiment 2 of this application;

[0034] Figure 5 shows a schematic diagram of the limiting structure in Figure 4;

[0035] Figure 6 shows a schematic diagram of the coil component in Figure 4 without the limiting structure;

[0036] Figure 7 shows a schematic diagram of the structure of the coil component provided in Embodiment 3 of this application;

[0037] Figure 8 shows a schematic diagram of the limiting structure in Figure 7;

[0038] Figure 9 shows a cross-sectional view of the limiting structure in Figure 8;

[0039] Figure 10 shows a schematic diagram of the coil component in Figure 7 without the limiting structure;

[0040] Figure 11 shows a schematic diagram of the structure of the coil component provided in Embodiment 4 of this application;

[0041] Figure 12 shows a cross-sectional view of the coil component in Figure 11;

[0042] Figure 13 shows a schematic diagram of the limiting structure in Figure 11;

[0043] Figure 14 shows a schematic diagram of the coil component in Figure 11 without the limiting structure.

[0044] The above-mentioned figures include the following reference numerals: 10, coil body; 20, conductor; 30, insulation layer; 31, second snap-fit ​​structure; 311, guide surface; 32, riveting post; 40, limiting structure; 41, connecting part; 411, mating groove; 412, connecting sleeve; 4121, clearance groove; 413, first snap-fit ​​structure; 4131, snap hole; 4132, snap hook; 414, mating hole; 415, welding rib; 42, limiting part; 421, notch; 422, limiting groove; 423, arc-shaped surface. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0046] As shown in Figures 1 to 3, Embodiment 1 of this application provides a coil component, including a coil body 10, a conductor 20, an insulating layer 30, and a limiting structure 40. One end of the conductor 20 is electrically connected to the coil body 10. The insulating layer 30 at least covers the electrical connection between the conductor 20 and the coil body 10. The portion of the conductor 20 outside the insulating layer 30 is a free segment. At least a portion of the limiting structure 40 is located at the junction of the insulating layer 30 and the free segment, so as to limit at least the side of the free segment close to the insulating layer 30 by the limiting structure 40.

[0047] This design incorporates a limiting structure 40 within the coil component. At least a portion of the limiting structure 40 is positioned at the junction of the insulation layer 30 and the free segment. This allows the limiting structure 40 to limit and support at least the side of the free segment closest to the insulation layer 30. This design limits the range of motion of the portion of the free segment of the conductor near the insulation layer 30 (i.e., at the junction of the insulation layer and the free segment) in at least one direction. In other words, it limits the range of motion of the portion of the conductor 20 exposed above the insulation layer 30 relative to the portion fixed within the insulation layer 30. This prevents, in at least one direction, large-angle bending of the conductor at its exit point from the insulation layer 30, thus avoiding significant stress concentration and reducing or eliminating the risk of bending, breakage, or fracture of the conductor 20 at that location, thereby improving product reliability.

[0048] Without the limiting structure 40, the conductor 20 would swing, potentially creating a gap between the conductor 20 and the insulation layer 30. This gap would affect the sealing performance of the coil components. The limiting structure 40 prevents gaps between the conductor 20 and the insulation layer 30, thus improving the sealing performance of the coil components.

[0049] In some embodiments of this solution, the limiting structure 40 can be connected to the insulating layer 30 to fix the position of the limiting structure 40. Alternatively, the limiting structure 40 can be connected to other structures to fix the position of the limiting structure 40, for example, the limiting structure 40 can be connected to the coil body 10.

[0050] The coil body 10 includes a frame, winding, encapsulation layer, and stator housing. The winding is wound within the cavity of the frame, and both the frame and winding are located within the cavity of the stator housing, which provides protection. One end of the winding and the conductor 20 are electrically connected via multiple pins, and the insulation layer 30 encapsulates these pins after molding. The encapsulation layer fills the gaps within the cavity of the frame to encapsulate the winding, and is formed by injection molding or potting. The encapsulation layer and the insulation layer 30 can be integrally injection molded or potted, or they can be injection molded or potted separately.

[0051] In this design, the limiting structure 40 includes a limiting part 42, at least a portion of which is located at the junction of the insulation layer 30 and the free segment. The limiting part 42 limits at least one side of the free segment closest to the insulation layer 30. Thus, the limiting part 42 limits the range of motion of the free segment of the conductor near the insulation layer 30 (i.e., at the junction of the insulation layer 30 and the free segment) in at least one direction. This prevents large-angle bending and stress concentration at the point where the conductor exits the insulation layer 30, thereby reducing or avoiding the risk of bending, breakage, or snapping of the conductor 20 at that location.

[0052] Specifically, at least part of the limiting part 42 and the free section overlap along the axial direction of the limiting structure 40. This ensures that the limiting part 42 can limit and support the free section at the junction of the insulation layer 30 and the free section, thereby limiting the range of motion of the free section and preventing the conductor 20 from being damaged due to bending.

[0053] As shown in Figures 1 and 2, in Embodiment 1, the limiting part 42 is a circumferentially closed annular structure. The shape of the radial cross section of the limiting part 42 matches the shape of the radial cross section of the free section, and the limiting part 42 and the free section are fitted with a clearance.

[0054] Through the above-mentioned configuration, the limiting part 42 can limit the portion of the free segment located within the limiting part 42 in multiple radial directions of the free segment, thereby preventing the conductor from bending at a large angle at the point where it exits the insulation layer 30, thus preventing large stress concentration and avoiding bending damage or breakage of the conductor 20 at that position. Furthermore, the portion of the free segment located within the limiting part 42 has a certain amount of room for movement, so that when the portion of the free segment outside the limiting part 42 bends, the portion of the free segment located within the limiting part 42 can move accordingly, preventing large bending and stress concentration at the connection point between the portion of the free segment outside the limiting part 42 and the portion of the free segment inside the limiting part 42, thereby preventing bending damage or breakage of the free segment at that position.

[0055] The limiting structure 40 and the insulating layer 30 can be an integral structure. When the limiting structure 40 and the insulating layer 30 are an integral structure, the insulating layer 30 and the encapsulation layer of the coil body 10 can be an integral structure or separate structures.

[0056] Alternatively, the limiting structure 40 and the insulating layer 30 can be separate structures. In the case of separate structures, the limiting structure 40 can be first fitted onto the conductor 20, then the conductor 20 can be electrically connected to the coil body 10, then the insulating layer 30 can be formed, and finally the insulating layer 30 and the limiting structure 40 can be connected. Alternatively, the conductor 20 can be first electrically connected to the coil body 10, then the insulating layer 30 can be formed, then the limiting structure 40 can be fitted onto the conductor 20, and finally the insulating layer 30 and the limiting structure 40 can be connected.

[0057] Alternatively, as shown in Figures 4 to 6, in Embodiment 2, the limiting part 42 is an annular structure with a notch 421 in the circumferential direction. The shape of the radial cross section of the limiting part 42 matches the shape of the radial cross section of the free segment, and the limiting part 42 and the free segment are in clearance fit. The conductor 20 is a flat wire with two opposite wide surfaces and two opposite narrow surfaces. The notch 421 corresponds to one of the wide surfaces, and the width of the notch 421 is smaller than the width of the wide surface. Alternatively, the conductor 20 is a round wire, and the width of the notch 421 is smaller than the diameter of the conductor 20.

[0058] In this embodiment, the notch 421 reduces material usage and allows the limiting part 42 to elastically deform in the circumferential direction, facilitating the installation of the limiting part 42 and the wire 20. Since the width of the notch 421 is smaller than the width of the wide surface or the width of the notch 421 is smaller than the diameter of the wire 20, the wire 20 cannot come out of the notch 421. Thus, the limiting part 42 can limit the portion of the free segment located within the limiting part 42 in multiple radial directions of the free segment, preventing large-angle bending and stress concentration at the point where the wire 20 exits the insulation layer 30, thus avoiding bending damage or breakage of the wire 20 at that location. Due to the clearance fit between the limiting part 42 and the free segment, the portion of the free segment located within the limiting part 42 has a certain amount of room to move, preventing large bending and stress concentration at the connection point between the portion of the free segment outside the limiting part 42 and the portion inside the limiting part 42, thereby preventing bending damage or breakage of the free segment at that location.

[0059] Alternatively, as shown in Figures 7 to 14, in Embodiments 3 and 4, the limiting part 42 has a limiting groove 422, the inner surface shape of the limiting groove 422 matches the surface shape of the wire 20, the opening width of the limiting groove 422 is greater than or equal to the maximum radial dimension of the wire 20, and the inner surface of the limiting groove 422 limits at least two sides of the free segment.

[0060] The free segment is limited by the inner wall of the limiting groove 422. Since it is a groove structure and the inner surface shape of the limiting groove 422 matches the surface shape of the wire 20, the limiting groove 422 can limit the free segment located in the limiting groove in at least two directions, thus restricting the range of motion of the free segment.

[0061] Alternatively, in an embodiment not shown, the limiting part 42 is a plate-like structure that limits one side of the free segment. Using a plate-like structure results in a simple structure and low cost. Specifically, the plate-like structure is positioned in the direction in which the conductor 20 is prone to bending during use, thereby limiting the range of motion of the conductor 20 in that direction and reducing damage to the conductor 20.

[0062] As shown in Figures 1 and 5, in some embodiments, the end of the limiting portion 42 away from the insulating layer 30 has an arc-shaped surface 423 or a slope, which is used to contact the bent free segment. Thus, when the free segment bends towards the arc-shaped surface 423 or the slope, it will contact the arc-shaped surface 423 or the slope, and the arc-shaped surface 423 or the slope can also serve as a limiting surface. Furthermore, providing an arc-shaped surface 423 or a slope at the end of the limiting portion 42 away from the insulating layer 30 provides a larger contact area with the free segment compared to using sharp edges, thus avoiding stress concentration and preventing damage to the free segment.

[0063] Furthermore, the limiting structure 40 includes a connecting portion 41, which is connected to the insulating layer 30 or the coil body 10. This connection between the connecting portion 41 and the insulating layer 30 or the coil body 10 fixes the position of the limiting structure 40, thereby reliably limiting the free segment of the conductor 20.

[0064] In some embodiments, the connecting part 41 and the limiting part 42 are an integral structure, such as an injection-molded structure, which is easy to process and has low cost.

[0065] In some designs, the connecting part 41 and the insulating layer 30 are an integral structure, and the limiting part 42 is spaced apart from the insulating layer 30. This can also limit the wire 20. Furthermore, the limiting structure 40 and the insulating layer 30 can be processed together without the need for separate processing and connection.

[0066] As shown in Figures 1 to 6, in some embodiments, the connecting part 41 includes a connecting sleeve 412, which is circumferentially closed or has an opening. The connecting sleeve 412 is sleeved on the insulating layer 30, thus limiting the position of the connecting sleeve 412 and thereby defining the position of the limiting part 42.

[0067] Alternatively, as shown in Figures 7 to 14, in some embodiments, the connecting portion 41 is a shell-like structure with a mating groove 411, and a portion of the insulating layer 30 is located within the mating groove 411. This method can limit the connecting portion 41 in at least two directions. This structure reduces the amount of material used in the connecting portion 41 and is more suitable for first molding the insulating layer 30, and then mating the insulating layer 30 with the connecting portion 41.

[0068] In this solution, the connecting part 41 and the insulating layer 30 can be connected in different ways, such as snapping the connecting part 41 and the insulating layer 30 together, riveting the connecting part 41 and the insulating layer 30 together, welding the connecting part 41 and the insulating layer 30 together, bonding the connecting part 41 and the insulating layer 30 together, or inserting the connecting part 41 and the insulating layer 30 together.

[0069] As shown in Figures 1 to 6, in some embodiments, the connecting portion 41 includes a connecting sleeve 412 and a first snap-fit ​​structure 413 disposed on the connecting sleeve 412. The outer wall of the insulating layer 30 has a second snap-fit ​​structure 31. The connecting sleeve 412 is sleeved on the insulating layer 30, and the first snap-fit ​​structure 413 and the second snap-fit ​​structure 31 snap together. Thus, the connection between the connecting portion 41 and the insulating layer 30 is achieved through the snap-fit ​​of the first snap-fit ​​structure 413 and the second snap-fit ​​structure 31. This method requires no tools, is easy to operate, and allows for the disassembly of the limiting structure 40.

[0070] Specifically, as shown in Figures 1 to 3, one of the first snap-fit ​​structure 413 and the second snap-fit ​​structure 31 includes a snap hole 4131 or a snap slot, and the other of the first snap-fit ​​structure 413 and the second snap-fit ​​structure 31 includes a snap block, which snaps into the snap hole 4131 or the snap slot. Alternatively, as shown in Figures 4 to 6, one of the first snap-fit ​​structure 413 and the second snap-fit ​​structure 31 includes a snap hook 4132, and the other of the first snap-fit ​​structure 413 and the second snap-fit ​​structure 31 includes a snap block, which snaps into the snap hook 4132. Of course, other feasible snap-fit ​​methods can also be used for the specific snap-fit ​​form of the first snap-fit ​​structure 413 and the second snap-fit ​​structure 31.

[0071] As shown in Figures 2 and 5, the side wall of the connecting sleeve 412 has a relief groove 4121. The end of the first snap-fit ​​structure 413 is connected to the bottom wall of the relief groove 4121. In this way, the first snap-fit ​​structure 413 is located in the relief groove 4121, which can reduce the space occupied by the connecting part 41. Since the side wall of the first snap-fit ​​structure 413 and the relief groove 4121 are spaced apart, one end of the first snap-fit ​​structure 413 is a free end. The first snap-fit ​​structure 413 is easy to undergo elastic deformation, thereby snapping or separating from the second snap-fit ​​structure 31.

[0072] As shown in Figures 3 and 6, the second snap-fit ​​structure 31 has a guide surface 311, which guides the elastic deformation of the first snap-fit ​​structure 413 during the snap-fit ​​operation, facilitating the snap-fit ​​operation between the first snap-fit ​​structure 413 and the second snap-fit ​​structure 31. Specifically, during the process of fitting the connecting sleeve 412 onto the insulating layer 30, the first snap-fit ​​structure 413 moves toward the second snap-fit ​​structure 31. After the first snap-fit ​​structure 413 contacts the guide surface 311, under the guidance of the guide surface 311, the free end of the first snap-fit ​​structure 413 undergoes elastic deformation until the snap-fit ​​hole 4131, slot, or hook 4132 of the first snap-fit ​​structure 413 snaps into the second snap-fit ​​structure 31.

[0073] In some embodiments, there are at least two first snap-fit ​​structures 413, and at least two first snap-fit ​​structures 413 engage with the same second snap-fit ​​structure 31; or in other embodiments, there are multiple first snap-fit ​​structures 413 and multiple second snap-fit ​​structures 31, and each first snap-fit ​​structure 413 engages with one second snap-fit ​​structure 31. Through these embodiments, multiple snap-fit ​​points can be used, improving the connection reliability between the insulating layer 30 and the connecting portion 41 and preventing them from becoming loose.

[0074] As shown in Figures 7 to 10, in Embodiment 3, the connecting part 41 has a mating hole 414, and the outer wall of the insulating layer 30 has a riveting post 32. The riveting post 32 passes through the mating hole 414, and the end of the riveting post 32 is riveted to the outer surface of the connecting part 41. This riveting method achieves a fixed connection between the connecting part 41 and the insulating layer 30. Specifically, the riveting post 32 is made of plastic. After the riveting post 32 passes through the mating hole 414, the end of the riveting post 32 exposed in the connecting part 41 is heated, causing it to melt. Then, pressure is applied using a tool, causing the end of the riveting post 32 exposed in the connecting part 41 to deform, increasing its radial dimension. After cooling, it is fixed, thus achieving the riveting connection.

[0075] Alternatively, as shown in Figures 11 to 14, in Embodiment 4, the connecting portion 41 has a welding rib 415 on the side facing the insulating layer 30, or the insulating layer 30 has a welding rib 415 on the side facing the connecting portion 41. The connecting portion 41 and the insulating layer 30 are welded together through the welding rib 415. This welding method achieves the connection between the connecting portion 41 and the insulating layer 30, resulting in a high connection strength. Specifically, after the connecting portion 41 and the insulating layer 30 are assembled, the welding rib 415 is melted by ultrasonic welding. After the welding rib 415 cools, it connects the connecting portion 41 and the insulating layer 30.

[0076] This application also provides an electric valve, which includes a valve body and the aforementioned coil component, the coil component being mounted on the valve body. This design incorporates a limiting structure 40 within the coil component, limiting the range of motion of the free section of the conductor near the insulation layer 30 in at least one direction. Specifically, it limits the range of motion of the portion of the conductor 20 exposed above the insulation layer 30 relative to the portion fixed within the insulation layer 30 in at least one direction. This prevents large-angle bending of the conductor at its exit point from the insulation layer 30, thus preventing stress concentration and reducing or avoiding the risk of bending, breakage, or snapping of the conductor 20 at that location, thereby improving product reliability.

[0077] The above description is merely an optional embodiment of this solution and is not intended to limit the solution. Various modifications and variations can be made to this solution by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this solution should be included within the scope of protection of this solution.

Claims

1. A coil component, characterized in that, The device includes a coil body (10), a wire (20), an insulation layer (30), and a limiting structure (40). One end of the wire (20) is electrically connected to the coil body (10). The insulation layer (30) at least covers the electrical connection between the wire (20) and the coil body (10). The portion of the wire (20) outside the insulation layer (30) is a free segment. At least a portion of the limiting structure (40) is located at the junction of the insulation layer (30) and the free segment, so as to limit at least one side of the free segment near the insulation layer (30) by the limiting structure (40).

2. The coil component according to claim 1, characterized in that, The limiting structure (40) includes a limiting part (42), at least a portion of which is located at the junction of the insulating layer (30) and the free segment, and the limiting part (42) limits at least one side of the free segment close to the insulating layer (30).

3. The coil component according to claim 2, characterized in that, At least part of the limiting portion (42) and the free segment coincide along the axial direction of the limiting structure (40).

4. The coil component according to claim 2, characterized in that, The limiting part (42) is a circumferentially closed annular structure. The shape of the radial cross section of the limiting part (42) matches the shape of the radial cross section of the free segment, and the limiting part (42) and the free segment are in clearance fit.

5. The coil component according to claim 2, characterized in that, The limiting part (42) is an annular structure with a notch (421) in the circumferential direction. The shape of the radial cross section of the limiting part (42) matches the shape of the radial cross section of the free segment, and the limiting part (42) and the free segment are in clearance fit. The conductor (20) is a flat wire with two opposite wide surfaces and two opposite narrow surfaces. The notch (421) corresponds to one of the wide surfaces, and the width of the notch (421) is smaller than the width of the wide surface. Alternatively, the conductor (20) is a round wire with the width of the notch (421) smaller than the diameter of the conductor (20).

6. The coil component according to claim 2, characterized in that, The limiting part (42) has a limiting groove (422), the inner surface shape of the limiting groove (422) matches the surface shape of the wire (20), the opening width of the limiting groove (422) is greater than or equal to the maximum radial dimension of the wire (20), and the inner surface of the limiting groove (422) limits at least two sides of the free segment.

7. The coil component according to claim 2, characterized in that, The limiting part (42) is a plate-shaped structure, which limits one side of the free segment.

8. The coil component according to claim 2, characterized in that, The limiting portion (42) has an arc-shaped surface (423) or a slope at one end away from the insulating layer (30), the arc-shaped surface (423) or the slope being used to contact the free segment that is bent.

9. The coil component according to claim 1, characterized in that, The limiting structure (40) includes a connecting part (41), which is connected to the insulating layer (30) or the coil body (10).

10. The coil component according to claim 9, characterized in that, The limiting structure (40) further includes a limiting part (42) connected to the connecting part (41), at least a portion of the limiting part (42) being located at the junction of the insulating layer (30) and the free segment, the limiting part (42) limiting at least one side of the free segment near the insulating layer (30); wherein the connecting part (41) and the limiting part (42) are an integral structure, and / or the connecting part (41) and the insulating layer (30) are an integral structure.

11. The coil component according to claim 9, characterized in that, The connecting part (41) includes a connecting sleeve (412), which is circumferentially closed or has an opening, and is fitted onto the insulating layer (30); or the connecting part (41) is a shell-like structure with a mating groove (411), and a portion of the insulating layer (30) is located in the mating groove (411).

12. The coil component according to claim 9, characterized in that, The connecting part (41) and the insulating layer (30) are snapped together, or the connecting part (41) and the insulating layer (30) are riveted together, or the connecting part (41) and the insulating layer (30) are welded together, or the connecting part (41) and the insulating layer (30) are bonded together, or the connecting part (41) and the insulating layer (30) are inserted together.

13. The coil component according to claim 9, characterized in that, The connecting part (41) includes a connecting sleeve (412) and a first snap-fit ​​structure (413) disposed on the connecting sleeve (412). The outer wall of the insulating layer (30) has a second snap-fit ​​structure (31). The connecting sleeve (412) is sleeved on the insulating layer (30), and the first snap-fit ​​structure (413) and the second snap-fit ​​structure (31) snap-fit ​​together.

14. The coil component according to claim 13, characterized in that, One of the first snap-fit ​​structure (413) and the second snap-fit ​​structure (31) includes a snap-fit ​​hole (4131) or a snap-fit ​​groove, and the other of the first snap-fit ​​structure (413) and the second snap-fit ​​structure (31) includes a snap-fit ​​block, which snaps into the snap-fit ​​hole (4131) or the snap-fit ​​groove; or, One of the first snap-fit ​​structure (413) and the second snap-fit ​​structure (31) includes a hook (4132), and the other of the first snap-fit ​​structure (413) and the second snap-fit ​​structure (31) includes a snap block, which snaps into the hook (4132).

15. The coil component according to claim 13, characterized in that, The side wall of the connecting sleeve (412) has a relief groove (4121), the end of the first snap-fit ​​structure (413) is connected to the bottom wall of the relief groove (4121), and the side walls of the first snap-fit ​​structure (413) and the relief groove (4121) are spaced apart. And / or, The second snap-fit ​​structure (31) has a guide surface (311) for guiding the elastic deformation of the first snap-fit ​​structure (413) during snap-fit ​​operation; and / or, There are at least two first snap-fit ​​structures (413), and at least two first snap-fit ​​structures (413) are snap-fitted with the same second snap-fit ​​structure (31); and / or, There are multiple first snap-fit ​​structures (413) and multiple second snap-fit ​​structures (31), and each first snap-fit ​​structure (413) is snap-fitted with one second snap-fit ​​structure (31).

16. The coil component according to claim 9, characterized in that, The connecting part (41) has a mating hole (414), and the outer wall of the insulating layer (30) has a riveting post (32). The riveting post (32) passes through the mating hole (414), and the end of the riveting post (32) is riveted to the outer surface of the connecting part (41).

17. The coil component according to claim 9, characterized in that, The connecting part (41) has a welding rib (415) on the side facing the insulating layer (30), or the insulating layer (30) has a welding rib (415) on the side facing the connecting part (41), and the connecting part (41) and the insulating layer (30) are welded together by the welding rib (415).

18. An electric valve, characterized in that, The electric valve includes a valve body and a coil component as described in any one of claims 1 to 17, the coil component being mounted on the valve body.

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