Coil rack and relay

Abstract

The utility model relates to the technical field of electronic control devices, in particular to a coil rack and a relay. The coil rack comprises a first part and a second part, wherein the first part is provided with a first cavity which penetrates through two opposite sides of the first part and is used for penetrating an armature; in the first direction, the first cavity is provided with a first opening end and a second opening end which are oppositely arranged, the first opening end is used for being close to the fulcrum end of the armature, and the second opening end is used for being close to the swing end of the armature; the outer contour of the first part is smoothly arranged and is used for winding a coil; the outer contour of the first part surrounds in all planes perpendicular to the first direction to form a first closed area, and the area of the first closed area is sequentially increased in the direction from the first opening end to the second opening end. According to the coil rack, by optimizing the structure, the occupied space can be reduced, and more coil winding space can be reserved.

Description

Technical Field

[0001] This utility model relates to the field of electronic control device technology, and more specifically, to a coil frame and a relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] In related technologies, relays mainly include a coil assembly, an armature, and a yoke. The coil assembly includes a coil frame and a coil wound around the surface of the coil frame. The armature passes through the coil frame and, along its length, one end serves as a fixed fulcrum and can rotate relative to the yoke, while the other end can swing relative to the yoke, thereby driving a pusher to actuate the contacts. However, due to the limited internal space of the relay and the large space occupied by the coil frame, the space available for coil winding is restricted, resulting in a reduction in the number of turns the coil can be wound, affecting the coil's attraction force and the stability of the relay's parameters.

[0004] Therefore, there is an urgent need to provide a coil holder that can reduce the space occupied. Utility Model Content

[0005] This utility model provides a coil holder and a relay. By optimizing the structure, the coil holder can reduce the space occupied, so as to reserve more space for coil winding.

[0006] This utility model embodiment provides a coil frame, including: a first part, the first part having a first cavity extending through its opposite sides and used for passing an armature; along a first direction, the first cavity has a first opening end and a second opening end disposed opposite to each other, the first opening end being used to approach the fulcrum end of the armature, and the second opening end being used to approach the swing end of the armature; the outer contour of the first part is smoothly arranged for winding a coil; the outer contour of the first part forms a first closed region in each plane perpendicular to the first direction, and the area of ​​the first closed region increases sequentially along the direction from the first opening end to the second opening end.

[0007] According to some embodiments of the present invention, the inner wall surface of the first cavity is smoothly arranged along the first direction, and the inner wall surface of the first cavity forms a second closed region in each plane perpendicular to the first direction; the area of ​​the second closed region increases sequentially along the direction from the first opening end to the second opening end.

[0008] According to some embodiments of this utility model, the wall thickness of the first part is the same.

[0009] According to some embodiments of this utility model, the first closed region is a rectangular region, and the second closed region is a rectangular region.

[0010] According to some embodiments of the present invention, the outer contour of the first part includes a first outer surface, a second outer surface, a third outer surface and a fourth outer surface connected in sequence, wherein the first outer surface and the third outer surface are disposed opposite to each other in a second direction, the second outer surface and the fourth outer surface are disposed opposite to each other in a third direction, the second direction is perpendicular to the first direction and is disposed perpendicular to the swing plane of the armature, and the third direction is perpendicular to the second direction and the first direction.

[0011] Along the direction from the first opening end to the second opening end, the first outer surface and the third outer surface are spaced at the same distance in the second direction, while the distance between the second outer surface and the fourth outer surface gradually increases in the third direction.

[0012] According to some embodiments of the present invention, the coil frame further includes a second part connected to the first part, the second part having a second cavity, the second cavity communicating with the first cavity through the first opening end; the outer contour of the second part and the outer contour of the first part cooperate to form a stepped structure, the stepped structure having a stepped surface in the first direction, the stepped surface being used to limit one end of the coil along the first direction.

[0013] According to some embodiments of the present invention, the cross-sectional area of ​​the second cavity perpendicular to the first direction is greater than the cross-sectional area of ​​the first cavity perpendicular to the first direction, and the inner wall surface forming the second cavity and the inner wall surface forming the first cavity are chamfered at the connection position.

[0014] According to some embodiments of the present invention, the coil frame further includes a third part, which extends from the outer contour of the first part in a direction away from the first part, and the third part and the stepped surface are spaced apart in the first direction to limit the other end of the coil.

[0015] According to some embodiments of this utility model, the coil frame is an integrally molded structure.

[0016] This utility model also provides a relay, including a coil frame as provided in any of the above technical solutions.

[0017] One embodiment of the above-described utility model has at least the following advantages or beneficial effects:

[0018] 1. The outer contour of the first part of the coil frame provided in this application is smoothly designed, which facilitates winding operations on the surface of the coil frame, thereby improving winding uniformity and coil winding firmness. The outer contour of the first part of the coil frame provided in this application is designed as a trapezoidal structure, which ensures that the armature can swing freely inside while reducing the volume occupied by the coil frame, thereby increasing the external winding space, facilitating the increase of the number of coil turns and the increase of the attraction ampere-turns. Furthermore, after the electromagnetic attraction force generated by the coil wound on the surface of the coil frame increases, the parameter stability of the relay can be improved, reducing the difference in action and reset voltage caused by the reaction force deviation.

[0019] 2. In this application, the inner wall surface forming the first cavity forms a second closed region in each plane perpendicular to the first direction. Along the direction from the first opening end to the second opening end, the area of ​​the second closed region increases uniformly with the area of ​​the first closed region, so as to facilitate the armature passing through the first cavity and improve the swing freedom of the armature, avoiding the armature being restricted by the inner wall surface of the first cavity during swing, thus affecting the structural performance of the relay.

[0020] 3. The wall thickness of the first part in this application is the same to reduce the difficulty of preparation.

[0021] 4. In this application, the first closed region is a rectangular region, and the second closed region is a rectangular region. This is to adapt to the shape of the armature and make reasonable use of space.

[0022] 5. Because the first open end is close to the fulcrum of the armature rotation, the swing amplitude of the armature at the first open end is small. Compared with the second open end, this application can make full use of space by reducing the distance between the second outer surface and the fourth outer surface in the plane where the first open end is located, without affecting the armature swing freedom, so as to increase the winding ampere-turns, increase the electromagnetic attraction force generated by the coil, and improve the stability of relay parameters. Attached Figure Description

[0023] Figure 1 The diagram shown is a structural schematic of the coil frame provided in an embodiment of this application;

[0024] Figure 2 The diagram shown is an exploded view of the coil frame and armature provided in an embodiment of this application;

[0025] Figure 3 The diagram shown is a structural schematic of the coil frame and armature assembled according to an embodiment of this application;

[0026] Figure 4 What is shown is Figure 1 A simplified schematic diagram of the first part;

[0027] Figure 5 What is shown is Figure 3 A plan view of the structure;

[0028] Figure 6 What is shown is Figure 3 A planar schematic diagram of the structure from another angle;

[0029] Figure 7 What is shown is Figure 5 Sectional view at point AA;

[0030] Figure 8 What is shown is Figure 7 Enlarged view of point B in the middle;

[0031] Figure 9 This is another schematic diagram of the first part of the coil frame provided in the embodiment of this application.

[0032] The annotations in the attached figures are explained as follows:

[0033] 100, Coil frame; 110, First part; S1, First outer surface; S2, Second outer surface; S3, Third outer surface; S4, Fourth outer surface; C1, First cavity; C2, Second cavity; 120, Second part; 130, Third part; 200, Armature. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0035] This application provides a relay, which is widely used as a switch that can control a large current with a small current. The relay mainly includes a coil assembly, an armature, and a yoke. The coil assembly includes a coil frame and a coil wound on the surface of the coil frame. The armature passes through the coil frame and is along the length of the armature. One end of the armature serves as a fixed fulcrum and can rotate relative to the yoke, while the other end can swing relative to the yoke, thereby driving a pusher to push the contacts to actuate.

[0036] For example, a yoke is provided on both sides of the armature's thickness. Along the length of the armature, one end of the yoke serves as a fixed fulcrum and can rotate relative to the yoke, while the other end can swing relative to the yoke. During operation, when the coil is energized, the armature swings under the action of the yoke, bringing it into contact with one side of the yoke. If a monostable relay is used, when the coil is de-energized, the armature swings in the opposite direction due to the spring's reaction force, bringing it into contact with the other side of the yoke and returning to its initial open state.

[0037] It is worth noting that the coil holder in the relay provided in this application embodiment can be any of the following technical solutions.

[0038] This application provides a coil frame. Figure 1 The diagram shown is a structural schematic of the coil frame 100 provided in an embodiment of this application; Figure 2 The diagram shown is an exploded view of the coil frame 100 and armature 200 provided in an embodiment of this application; Figure 3 The diagram shown is a structural schematic of the coil frame 100 and armature 200 assembled according to an embodiment of this application. Please refer to... Figure 2 and Figure 3 refer to Figure 1 The structure shown includes a first part 110, which has a first cavity C1 extending through its opposite sides and used for inserting an armature 200. Figure 4 What is shown is Figure 1 A simplified schematic diagram of the first part, 110; please refer to it. Figure 1 refer to Figure 4 The structure shown has a first cavity C1 with a first opening end and a second opening end arranged opposite to each other along a first direction. The first opening end is used to approach the fulcrum end of the armature 200, and the second opening end is used to approach the swing end of the armature 200. It is worth noting that the first direction is represented by direction X in the above figures, and this first direction is parallel to the arrangement direction of the first opening end and the second opening end.

[0039] Please refer to Figures 1 to 4 The structure shown has a smooth outer contour in the first part 110 for winding the coil. It should be understood that "smooth outer contour" means that the surface of the outer contour is relatively flat, without specific protrusions or depressions. As an example, the edges of the outer contour of the first part 110 are rounded to prevent the enameled wire inside the coil from contacting and scratching the edges. Of course, when the manufacturing process causes minor structural deformation on the surface of the outer contour, and this minor structural deformation does not affect the overall use, the outer contour is also considered "smooth".

[0040] It is worth noting that when the outer contour of the coil frame 100 has a raised or recessed structure, the outer contour will inevitably be uneven. In this case, the uniformity of coil winding throughout the coil frame 100 cannot be guaranteed. Furthermore, if the coil is wound with the same tightness, when the coil reaches the raised structure, it will be subjected to a concentrated reaction force from the raised structure on its surface, which can easily lead to breakage. It should be noted that the outer contour of the first portion 110 within the coil frame 100 provided in this embodiment is smoothly designed, facilitating winding operations on the surface of the coil frame 100, thereby improving winding uniformity and the strength of coil winding.

[0041] Please continue to refer to this. Figures 1 to 4 The structure shown has an outer contour of the first part 110 forming a first closed region in each plane perpendicular to the first direction; the area of ​​the first closed region increases sequentially from the first open end to the second open end. However, this sequential increase in the area of ​​the first closed region is relative and may not be a completely linear growth.

[0042] It should be understood that when setting the structure of the first part 110, it should be ensured that the armature 200 can swing freely within the first cavity C1. For example... Figure 3 As shown, since the armature 200 protrudes from the first portion 110 at both ends when it passes through the coil frame 100, the swing amplitude of the armature 200 at the first open end is smaller than that at the second open end. Therefore, the area of ​​the first closed region closer to the first open end in the first direction can be designed to be smaller. In other words, the area of ​​the first closed region is smallest in the plane containing the first open end and largest in the plane containing the second open end, forming a structure similar to a trapezoidal truncated pyramid.

[0043] It should be noted that the coil frame 100 provided in this embodiment has a trapezoidal outer contour of the first part 110. This design ensures that the armature 200 can swing freely inside while reducing the volume occupied by the coil frame 100, thereby increasing the external winding space and facilitating an increase in the number of coil turns and the attraction ampere-turns. Furthermore, as the electromagnetic attraction generated by the coil wound on the surface of the coil frame 100 increases, the parameter stability of the relay can be improved, reducing the difference in action and reset voltage caused by the reaction force deviation.

[0044] Therefore, the coil holder 100 provided in this application embodiment can reduce the space occupied by optimizing the structure, so as to reserve more space for coil winding, thereby facilitating the increase of the number of coil winding turns, the improvement of the electromagnetic attraction generated by the coil, and the improvement of the stability of relay parameters.

[0045] When using the coil holder 100 provided in this application embodiment, the cross-sectional dimensions of the outer contour of the first portion 110 at the second open end can be set to be the same as the cross-sectional dimensions of the outer contour of the coil holder 100 in the related art, and the size of the first closed region can be gradually reduced along the direction from the second open end to the first open end. Compared with the coil holder in the related art, calculations show that the coil holder 100 provided in this application embodiment can increase the ampere-turns of the coil by more than 20% after winding the coil. In general, the coil holder 100 provided in this application embodiment can fully optimize the spatial structure to increase the winding ampere-turns and increase the electromagnetic attraction generated by the coil without increasing the external size and volume of the coil holder 100, thereby improving the stability of relay parameters.

[0046] When specifically configuring the first part 110, the inner wall surface forming the first cavity C1 may be provided with protrusions or grooves. Preferably, in a specific embodiment, please refer to... Figure 5 and Figure 6 refer to Figure 7 The structure shown has a smooth inner wall surface forming the first cavity C1 along the first direction. It should be understood that "smooth inner wall surface" means that the surface of the inner wall is relatively flat, without any specific protrusions or depressions. Of course, when the manufacturing process causes minor structural deformations on the surface of the inner wall, and these minor deformations do not affect the overall use, the inner wall surface is also considered "smooth."

[0047] Please continue to combine Figure 5 and Figure 6 refer to Figure 7 The structure shown has an inner wall surface forming a first cavity C1 that surrounds a second closed region in each plane perpendicular to the first direction; the area of ​​the second closed region increases sequentially from the first opening end to the second opening end. However, this sequential increase in the area of ​​the second closed region is relative and may not be a completely linear growth.

[0048] It should be noted that, along the direction from the first opening end to the second opening end, the area change pattern of the second closed region in this embodiment is the same as that of the first closed region, and the area increases uniformly. This is to facilitate the armature 200 passing through the first cavity C1 and to improve the swing freedom of the armature 200, so as to avoid the armature 200 being restricted by the inner wall of the first cavity C1 when swinging, thus affecting the structural performance of the relay.

[0049] In one embodiment, the first portion 110 has a uniform wall thickness to reduce manufacturing difficulty. For example, the coil frame 100 provided in this embodiment can be injection molded.

[0050] Please continue to refer to this. Figure 2 The structure shown depicts an armature 200 that is elongated. To accommodate the shape of the armature 200 and optimize space utilization, it can be configured as follows: In one embodiment, please refer to... Figure 4 The structure shown has two rectangular closed regions. It's worth noting that a rounded chamfer may be present when forming the first part 110 to increase the smoothness of the outer contour and facilitate coil winding. Therefore, the first closed region may not be strictly rectangular; there may be a rounded transition between adjacent sides at the connection point. Similarly, the second closed region may not be strictly rectangular; there may be a rounded transition between adjacent sides at the connection point.

[0051] In one specific embodiment, please refer to Figure 3 refer to Figure 4 The structure shown includes a first outer surface S1, a second outer surface S2, a third outer surface S3, and a fourth outer surface S4 connected sequentially. The first outer surface S1 and the third outer surface S3 are positioned opposite each other in a second direction, while the second outer surface S2 and the fourth outer surface S4 are positioned opposite each other in a third direction. The second direction is perpendicular to the first direction and is used to perpendicularly position the swing plane of the armature 200. The third direction is perpendicular to both the second and first directions. It should be understood that the "swing plane of the armature 200" refers to the plane in which the armature 200 is located during the swinging process. Figure 3 As shown, the swing end of the armature 200 can swing along the direction of the dotted arrow, and during the swinging process, the armature 200 will move within this plane. Figure 3 As shown, the height direction of armature 200 is perpendicular to the swing plane.

[0052] Please continue to refer to this. Figure 3 and Figure 4 In the structure shown, the armature 200 passes through the first cavity C1 of the coil frame 100, and the second outer surface S2 and the fourth outer surface S4 are located on both sides of the armature 200's swing direction. For example, in the above figures, direction X represents the first direction, direction Y represents the third direction, and direction Z represents the second direction; directions X, Y, and Z are mutually perpendicular. It should be understood that direction X is also parallel to the length direction of the armature 200, direction Z is also parallel to the height direction of the armature 200, and direction Y is also parallel to the thickness direction of the armature 200.

[0053] In one specific embodiment, please refer to Figure 4 and Figure 7 The structure shown has the same distance between the first outer surface S1 and the third outer surface S3 in the second direction (i.e., direction Z) along the direction from the first opening end to the second opening end, while the distance between the second outer surface S2 and the fourth outer surface S4 gradually increases in the third direction (i.e., direction Y). It should be understood that the first portion 110 in this embodiment only undergoes dimensional changes in the third direction. For example, as... Figure 4 As shown, the distance y1 between the second outer surface S2 and the fourth outer surface S4 in the plane where the first opening end is located is less than the distance y2 between the second outer surface S2 and the fourth outer surface S4 in the plane where the second opening end is located, and the distance z1 between the first outer surface S1 and the third outer surface S3 in the plane where the first opening end is located is equal to the distance z2 between the first outer surface S1 and the third outer surface S3 in the plane where the second opening end is located.

[0054] It should be noted that because the first open end is close to the fulcrum of the armature 200's rotation, the swing amplitude of the armature 200 at the first open end is small. Compared to the second open end, this embodiment of the application, by reducing the distance between the second outer surface S2 and the fourth outer surface S4 in the plane where the first open end is located, can make full use of space without affecting the swing freedom of the armature 200, thereby increasing the winding ampere-turns, increasing the electromagnetic attraction force generated by the coil, and improving the stability of the relay parameters.

[0055] In another specific embodiment, please refer to Figure 9 In the structure shown, along the direction from the first opening end to the second opening end, the distance between the first outer surface S1 and the third outer surface S3 gradually increases in the second direction (i.e., direction Z), while the distance between the second outer surface S2 and the fourth outer surface S4 gradually increases in the third direction (i.e., direction Y). For example, as... Figure 9 As shown, the distance y1 between the second outer surface S2 and the fourth outer surface S4 in the plane where the first opening end is located is less than the distance y2 between the second outer surface S2 and the fourth outer surface S4 in the plane where the second opening end is located, and the distance z1 between the first outer surface S1 and the third outer surface S3 in the plane where the first opening end is located is less than the distance z2 between the first outer surface S1 and the third outer surface S3 in the plane where the second opening end is located.

[0056] It should be noted that the structural configuration in this specific embodiment can further reduce the volume occupied by the coil frame 100, increase the external winding space, increase the number of coil winding turns, increase the suction ampere-turns, and improve the stability of relay parameters.

[0057] Of course, since the dimensional distance between the coil frame 100 and the armature 200 in the Z direction is small in the related technology, the dimensional difference between the two can be set to be small when setting the spacing dimension z1 and the spacing dimension z2 in this specific embodiment, so as to make reasonable use of space while ensuring the degree of freedom of the armature 200, reduce the volume occupied by the coil frame 100, and reserve more space for coil winding.

[0058] In one embodiment, please refer to... Figures 1 to 3 As shown in the diagram, the coil frame 100 provided in this embodiment of the application further includes a second part 120 connected to the first part 110, and the second part 120 is provided with the following... Figure 7 and Figure 8 The second cavity C2 shown is connected to the first cavity C1 through the first opening end; the outer contour of the second part 120 and the outer contour of the first part 110 cooperate to form a stepped structure. The stepped structure has a stepped surface in the first direction. The stepped surface is used to limit one end of the coil in the first direction (i.e., direction X) to prevent the coil from coming off from that side, so as to improve the stability of the coil after winding, thereby improving the structural performance of the relay.

[0059] Among them, such as Figure 1 As shown, the second part 120 may have several fixing slots for mounting the leads of the connecting coil and outputting signals; details will not be elaborated further.

[0060] In one embodiment, please refer to Figure 7 and Figure 8 As shown in the structure, the cross-sectional area of ​​the second cavity C2 in the plane perpendicular to the first direction is larger than the cross-sectional area of ​​the first cavity C1 in the plane perpendicular to the first direction, so as to facilitate the installation of the armature 200. Of course, other structural components may be provided in the second cavity C2 to realize the rotation operation of the armature 200 relative to the yoke at this end, which will not be described in detail here.

[0061] Please continue to refer to this. Figure 8 The structure shown has a chamfer P at the connection point between the inner wall surface of the second cavity C2 and the inner wall surface of the first cavity C1. This chamfer P facilitates the insertion of the armature 200 from the second cavity C2 into the first cavity C1, thereby reducing assembly difficulty.

[0062] In one embodiment, please refer to... Figures 1 to 3 As shown in the structure, the coil frame 100 provided in this application embodiment also includes a third part 130. The third part 130 extends from the outer contour of the first part 110 in a direction away from the first part 110. The third part 130 and the step surface are spaced apart in the first direction (i.e., direction X) to limit the other end of the coil and prevent the coil from coming off from that side, thereby further improving the stability of the coil after winding and thus improving the structural performance of the relay.

[0063] In one embodiment, the coil frame 100 is a one-piece molded structure to reduce the difficulty and cost of manufacturing.

[0064] Finally, it should be noted that the various embodiments / implementations provided by this utility model can be combined with each other without creating contradictions, and will not be described in detail here.

[0065] In the embodiments of the utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the utility model according to the specific circumstances.

[0066] In the description of the utility model embodiments, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the utility model embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model embodiments.

[0067] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] The above are merely preferred embodiments of the utility model and are not intended to limit the utility model. For those skilled in the art, various modifications and variations can be made to the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the utility model should be included within the protection scope of the utility model.

Claims

1. A coil holder, characterized in that, include: The first part has a first cavity extending through its opposite sides and used for inserting an armature. Along the first direction, the first cavity has a first opening end and a second opening end that are disposed opposite to each other. The first opening end is used to approach the fulcrum end of the armature, and the second opening end is used to approach the swing end of the armature. The outer contour of the first part is smoothly disposed for winding a coil. The outer contour of the first part forms a first closed region in each plane perpendicular to the first direction, and the area of ​​the first closed region increases sequentially along the direction from the first opening end to the second opening end.

2. The coil frame according to claim 1, characterized in that, Along the first direction, the inner wall surface forming the first cavity is smoothly disposed, and the inner wall surface forming the first cavity surrounds a second closed region in each plane perpendicular to the first direction; along the direction from the first opening end to the second opening end, the area of ​​the second closed region increases sequentially.

3. The coil frame according to claim 2, characterized in that, The first part has the same wall thickness.

4. The coil frame according to claim 3, characterized in that, The first closed region is a rectangular region, and the second closed region is a rectangular region.

5. The coil frame according to claim 4, characterized in that, The outer contour of the first part includes a first outer surface, a second outer surface, a third outer surface, and a fourth outer surface connected in sequence. The first outer surface and the third outer surface are disposed opposite to each other in a second direction, the second outer surface and the fourth outer surface are disposed opposite to each other in a third direction, the second direction is perpendicular to the first direction, and the second direction is used to be perpendicular to the swing plane of the armature, and the third direction is perpendicular to the second direction and the first direction. Along the direction from the first opening end to the second opening end, the first outer surface and the third outer surface are spaced at the same distance in the second direction, while the distance between the second outer surface and the fourth outer surface gradually increases in the third direction.

6. The coil frame according to any one of claims 1-5, characterized in that, The coil frame further includes a second part connected to the first part. The second part has a second cavity, which communicates with the first cavity through the first opening. The outer contour of the second part and the outer contour of the first part cooperate to form a stepped structure. The stepped structure has a stepped surface in the first direction, which is used to limit one end of the coil along the first direction.

7. The coil frame according to claim 6, characterized in that, The cross-sectional area of ​​the second cavity perpendicular to the first direction is greater than the cross-sectional area of ​​the first cavity perpendicular to the first direction, and the inner wall surface forming the second cavity and the inner wall surface forming the first cavity are chamfered at the connection position.

8. The coil frame according to claim 6, characterized in that, The coil frame further includes a third part, which extends from the outer contour of the first part in a direction away from the first part, and the third part and the stepped surface are spaced apart in the first direction to limit the other end of the coil.

9. The coil frame according to claim 6, characterized in that, The coil frame is a one-piece molded structure.

10. A relay, characterized in that, Includes the coil frame as described in any one of claims 1-9.

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