Coil component and electric valve

Abstract

According to the coil component and the electric valve provided by the utility model, the limiting structure is arranged in the coil component, and at least one part of the limiting structure is arranged at the junction of the insulating layer and the free section, so that one side, at least close to the insulating layer, of the free section can be limited and supported through the limiting structure. Through the scheme, the movement range of the part, close to the insulating layer, of the free section of the wire (namely the junction of the free section and the insulating layer) is limited, namely the movement range of the part, exposed out of the insulating layer, of the wire relative to the part, fixed in the insulating layer, of the wire is limited at least from one direction; in this way, large stress concentration caused by large-angle bending of the position where the wire penetrates out of the insulating layer is prevented at least from one direction, so that the risk that the wire is bent to be damaged or broken at the position is reduced or avoided, and the product reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric valve technical field, specifically, a coil component and electric valve. BACKGROUND

[0002] The electric valve comprises a coil component, and the coil component generates a magnetic field to drive a valve core structure of the electric valve to move. The coil component comprises a coil body and a wire, one end of the wire is electrically connected to the coil body, and the other end of the wire is connected to a power supply circuit to supply power to the coil body through the wire. The position where the wire is electrically connected to the coil body is sealed and insulated by an insulation layer formed by injection molding or potting, that is, one section of the wire is fixed in the insulation layer and cannot move, and the other section of the wire is exposed outside the insulation layer and can be bent. In this way, when the exposed wire is bent under the influence of an external force, stress concentration occurs at the connection position of the two sections of the wire (i.e., the position where the wire penetrates out of the insulation layer), which causes the wire to be easily bent, broken, or broken at this position. SUMMARY

[0003] The utility model provides a kind of coil component and electric valve, to solve the problem that the wire in coil component is bent, broken or broken under external force.

[0004] To solve the above problems, according to one aspect of the utility model, the utility model provides a kind of coil component, including coil body, wire, insulation layer and limiting structure, one end of the wire is electrically connected to the coil body, the insulation layer at least encloses the electrical connection position of the wire and the coil body, the part of the wire outside the insulation layer is free section, at least part of the limiting structure is located at the junction of the insulation layer and the free section, to limit at least the side of the free section close to the insulation layer by the limiting structure.

[0005] Further, the limiting structure includes a limiting portion, at least a portion of the limiting portion is located at the junction of the insulation layer and the free section, and the limiting portion limits at least the side of the free section close to the insulation layer.

[0006] Further, at least part of the limiting portion and the free section coincide along the axial direction of the limiting structure.

[0007] Further, the limiting portion is a circumferentially closed ring structure, the shape of the radial cross section of the limiting portion matches the shape of the radial cross section of the free section, and the limiting portion and the free section are gap fitted.

[0008] Alternatively, the limiting portion is a ring structure with a notch in the circumferential direction, the shape of the radial cross section of the limiting portion matches the shape of the radial cross section of the free section, and the limiting portion and the free section are gap fitted; wherein the wire is a flat wire, the wire 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 wire is a round wire, and the width of the notch is less than the diameter of the wire.

[0009] Alternatively, the limiting part has a limiting groove, an inner surface shape of the limiting groove matches a surface shape of the wire, an opening width of the limiting groove is greater than or equal to a maximum radial dimension of the wire, and the inner surface of the limiting groove limits at least two sides of the free section.

[0010] Alternatively, the limiting part is a plate structure, and the plate structure limits one side of the free section.

[0011] Further, an end of the limiting part away from the insulating layer has an arc surface or an inclined surface, and the arc surface or the inclined surface is used to contact the free section that is bent.

[0012] Further, the limiting structure includes a connecting part, and the connecting part is connected with the insulating layer or the coil body.

[0013] Further, the limiting structure further includes a limiting part connected with the connecting part, at least a part of the limiting part is located at an intersection of the insulating layer and the free section, and the limiting part limits at least one side of the free section close 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.

[0014] Further, the connecting part includes a connecting sleeve, a circumferential direction of the connecting sleeve is closed or has an opening, and the connecting sleeve is sleeved on the insulating layer; or the connecting part is a shell-shaped structure having a matching groove, and a part of the insulating layer is located in the matching groove.

[0015] Further, the connecting part and the insulating layer are clamped, or the connecting part and the insulating layer are riveted, or the connecting part and the insulating layer are welded, or the connecting part and the insulating layer are bonded, or the connecting part and the insulating layer are inserted.

[0016] Further, the connecting part includes a connecting sleeve and a first clamping structure arranged on the connecting sleeve, an outer wall of the insulating layer has a second clamping structure, the connecting sleeve is sleeved on the insulating layer, and the first clamping structure and the second clamping structure are clamped.

[0017] Further, one of the first clamping structure and the second clamping structure includes a clamping hole or a clamping groove, and the other of the first clamping structure and the second clamping structure includes a clamping block, and the clamping block is clamped with the clamping hole or the clamping groove; or,

[0018] One of the first clamping structure and the second clamping structure includes a clamping hook, and the other of the first clamping structure and the second clamping structure includes a clamping block, and the clamping block is clamped with the clamping hook.

[0019] Further, a side wall of the connecting sleeve has a avoiding groove, an end of the first clamping structure is connected with a bottom wall of the avoiding groove, and the first clamping structure and a side wall of the avoiding groove are arranged in a spaced manner; and / or,

[0020] 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,

[0021] There are at least two first-clamping structures, and at least two first-clamping structures engage with the same second-clamping structure; and / or...

[0022] There are multiple first and second snap-fit ​​structures, and each first snap-fit ​​structure is engaged with one second snap-fit ​​structure.

[0023] 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.

[0024] 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.

[0025] Another aspect of this utility model provides an electric valve, which includes a valve body and the aforementioned coil component, the coil component being mounted on the valve body.

[0026] 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

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0028] Figure 1 A schematic diagram of the coil component provided in Embodiment 1 of this utility model is shown;

[0029] Figure 2 It shows Figure 1 A schematic diagram of the limiting structure in the middle;

[0030] Figure 3 It shows Figure 1A schematic view of the coil component in the coil assembly of the embodiment one of the utility model;

[0031] Figure 4 A structure schematic view of the coil component provided by the embodiment two of the utility model is shown;

[0032] Figure 5 A schematic view of the limiting structure in the coil assembly of the embodiment one of the utility model is shown; Figure 4

[0033] A schematic view of the limiting structure in the coil assembly of the embodiment one of the utility model is shown; Figure 6 Figure 4 A schematic view of the coil component removing the limiting structure in the coil assembly of the embodiment one of the utility model is shown;

[0034] Figure 7 A structure schematic view of the coil component provided by the embodiment three of the utility model is shown;

[0035] Figure 8 A schematic view of the limiting structure in the coil assembly of the embodiment two of the utility model is shown; Figure 7

[0036] A sectional view of the limiting structure in the coil assembly of the embodiment two of the utility model is shown; Figure 9 Figure 8 A schematic view of the coil component removing the limiting structure in the coil assembly of the embodiment two of the utility model is shown;

[0037] Figure 10 Figure 7 A structure schematic view of the coil component provided by the embodiment four of the utility model is shown;

[0038] Figure 11 A structure schematic view of the coil component provided by the embodiment four of the utility model is shown;

[0039] Figure 12 A sectional view of the coil component in the coil assembly of the embodiment two of the utility model is shown; Figure 11

[0040] A schematic view of the limiting structure in the coil assembly of the embodiment three of the utility model is shown; Figure 13 Figure 11 A schematic view of the coil component removing the limiting structure in the coil assembly of the embodiment three of the utility model is shown.

[0041] Figure 14 The above-mentioned drawings include the following reference signs: Figure 11

[0042] 10, coil main body;

[0043] 20, wire;

[0044] 30, insulation layer; 31, second clamping structure; 311, guide surface; 32, riveting column;

[0045] 40, limiting structure;

[0046] 40, limiting structure;

[0047] ​​​​​41, connecting part; 411, matching groove; 412, connecting sleeve; 4121, avoiding slot; 413, first clamping structure; 4131, clamping hole; 4132, clamping hook; 414, matching hole; 415, fusion rib;

[0048] 42, limiting part; 421, notch; 422, limiting slot; 423, arc surface. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0050] As shown in the drawings, Figures 1 to 3 An embodiment of the present application provides a coil component, which comprises 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 encloses the electrically connected position of the wire 20 and the coil body 10. The part of the wire 20 outside the insulation layer 30 is a free section. At least a part of the limiting structure 40 is located at the junction of the insulation layer 30 and the free section, so as to limit the side of the free section close to the insulation layer 30 by the limiting structure 40.

[0051] The scheme sets the limiting structure 40 in the coil component, and sets at least a part of the limiting structure 40 at the junction of the insulation layer 30 and the free section, so as to limit and support the side of the free section close to the insulation layer 30 by the limiting structure 40. Through the scheme, the activity range of the part of the free section of the wire close to the insulation layer 30 (i.e. the junction of the insulation layer and the free section) is limited from at least one direction, that is, the activity range of the part of the wire 20 exposed to the insulation layer 30 relative to the part of the wire 20 fixed in the insulation layer 30 is limited from at least one direction. Thus, the position of the wire penetrating out of the insulation layer 30 is prevented from large-angle bending and generating large stress concentration from at least one direction, so as to reduce or avoid the risk of bending and breaking or breaking of the wire 20 at the position, and improve the product reliability.

[0052] In some embodiments of the scheme, the limiting structure 40 can be connected with the insulation layer 30 to fix the position of the limiting structure 40. Or the limiting structure 40 is connected with other structures to fix the position of the limiting structure 40, for example, the limiting structure 40 is connected with the coil body 10.

[0053] The coil main body 10 comprises a skeleton, a winding, an encapsulation layer and a stator shell. The winding is arranged in the cavity of the skeleton. The skeleton and the winding are located in the cavity of the stator shell, and the stator shell plays a protective role. The winding and one end of the wire 20 are electrically connected through a plurality of pins. The insulating layer 30 also encapsulates the pins after forming. The encapsulation layer fills the gap in the cavity of the skeleton to encapsulate the winding. The encapsulation layer is formed by injection molding or pouring.

[0054] In the present scheme, the limiting structure 40 comprises a limiting portion 42. At least a part of the limiting portion 42 is located at the junction of the insulating layer 30 and the free section, and the limiting portion 42 limits at least the side of the free section close to the insulating layer 30. In this way, the limiting portion 42 at least limits the movement range of the part of the free section close to the insulating layer 30 (i.e. the junction of the insulating layer 30 and the free section) from one direction, thereby preventing the wire from being bent at a large angle at the position where the wire penetrates out of the insulating layer 30 and causing large stress concentration, thereby reducing or avoiding the risk of damage or breakage of the wire 20 at this position.

[0055] Specifically, at least part of the limiting portion 42 and the free section coincide along the axial direction of the limiting structure 40. In this way, the limiting portion 42 can limit and support the free section at the junction of the insulating layer 30 and the free section, thereby limiting the movement range of the free section and avoiding damage of the wire 20 due to bending.

[0056] As shown in FIGS. 1, 2 and 3, the limiting portion 42 is located at the junction of the insulating layer 30 and the free section. Figure 1 and Figure 2 As shown in FIGS. 1, 2 and 3, the limiting portion 42 is located at the junction of the insulating layer 30 and the free section.

[0057] Through the above arrangement, the limiting portion 42 can limit the part of the free section located in the limiting portion 42 in multiple directions in the radial direction of the free section, thereby preventing the wire from being bent at a large angle at the position where the wire penetrates out of the insulating layer 30 and causing large stress concentration, and avoiding damage or breakage of the wire 20 at this position. In addition, the part of the free section located in the limiting portion 42 has a certain movement space. When the part of the free section located outside the limiting portion 42 is bent, the part of the free section located in the limiting portion 42 can move accordingly, thereby avoiding large bending and stress concentration at the connection position of the part of the free section located outside the limiting portion 42 and the part of the free section located in the limiting portion 42, and thereby avoiding damage or breakage of the free section at this position.

[0058] 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.

[0059] 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.

[0060] Or, such as Figures 4 to 6 As shown, 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.

[0061] 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.

[0062] Or, such as Figures 7 to 14 As shown, 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. The inner surface of the limiting groove 422 limits at least two sides of the free segment.

[0063] 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.

[0064] 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.

[0065] like Figure 1 and Figure 5 As shown, 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, by providing an arc-shaped surface 423 or a slope at the end of the limiting portion 42 away from the insulating layer 30, the contact area with the free segment is larger than that of a sharp edge, which can avoid stress concentration and thus prevent damage to the free segment.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] like Figures 1 to 6 As shown, in some embodiments, the connecting portion 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, thereby limiting the position of the connecting sleeve 412 and thus defining the position of the limiting portion 42.

[0070] Or, such as Figures 7 to 14As shown, 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 can reduce 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.

[0071] 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.

[0072] like Figures 1 to 6 As shown, 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. In this way, 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 does not require the use of tools, is easy to operate, and allows the limiting structure 40 to be disassembled.

[0073] Specifically, such as Figures 1 to 3 As shown, 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 ​​slot, 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 ​​slot. Alternatively, as... Figures 4 to 6 As shown, 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-fit ​​block, which snaps into the hook 4132. Of course, other feasible 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.

[0074] like Figure 2 and Figure 5 As shown, 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.

[0075] like Figure 3 andFigure 6 As shown, 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, so as to facilitate 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, the snap-fit ​​groove, or the snap-fit ​​hook 4132 of the first snap-fit ​​structure 413 snaps into the second snap-fit ​​structure 31.

[0076] 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.

[0077] like Figures 7 to 10 As shown, 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.

[0078] Or, such as Figures 11 to 14 As shown, 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 a high connection strength between the connecting portion 41 and the insulating layer 30. 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.

[0079] The application also provides an electric valve, which comprises a valve body and the coil component as described above, and the coil component is installed on the valve body. In the coil component, the limiting structure 40 is arranged to limit the movement range of the part of the free section of the wire close to the insulating layer 30 from at least one direction, i.e. to limit the movement range of the part of the wire 20 exposed to the insulating layer 30 relative to the part of the wire 20 fixed in the insulating layer 30 from at least one direction, so that the wire is prevented from being bent at a large angle at the position where the wire penetrates out of the insulating layer 30 to cause a large stress concentration, thereby reducing or avoiding the risk of the wire 20 being broken or fractured at the position, and improving the product reliability.

[0080] The above merely provides optional embodiments of the application and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall fall within the protection scope of the application.

[0081] It should be noted that the terms used herein are merely for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It should also be understood that the terms "comprise" and / or "include" when used in this specification, indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0082] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the application unless specifically stated otherwise. It should be understood that the sizes of the various parts shown in the drawings are not necessarily to scale. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification where appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0083] In the description of the present solution, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present solution and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the scope of protection of the present solution; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0084] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0085] In addition, it needs to be pointed out that the use of "first", "second" and the like to define parts only for the convenience of distinguishing the corresponding parts, and if there is no further declaration, the above words have no special meaning, therefore cannot be understood as a limitation on the scope of protection of the present 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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