Coil bobbin and relay

Abstract

The present disclosure relates to the technical field of electronic control devices, and in particular to a coil bobbin and a relay. The coil bobbin comprises a first portion, wherein the first portion is provided with a first cavity passing through two opposite ends thereof; along a first direction, the first cavity has a first open end and a second open end that are arranged opposite to each other; the outer contour of the first portion is smooth; the outer contour of the first portion forms a first closed region in each plane perpendicular to the first direction; and along a direction from the first open end to the second open end, the area of the first closed region sequentially increases. By means of an optimized structure, the coil bobbin can reduce occupied space, thereby providing more coil winding space.

Description

Coil frame and relay

[0001] This disclosure claims priority to Chinese Patent Application No. 202520175182.X, filed on January 26, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of electronic control device technology, and more specifically, to a coil holder and a relay. Background Technology

[0003] 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.

[0004] 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. 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 thus impacting the parameter stability of the relay.

[0005] Therefore, there is an urgent need to provide a coil holder that can reduce the space occupied. Summary of the Invention

[0006] This disclosure provides a coil holder and a relay. By optimizing the structure, the coil holder can reduce the space occupied, thereby reserving more space for coil winding.

[0007] According to one aspect of this disclosure, an embodiment of this disclosure provides a coil frame, comprising: a first portion having a first cavity extending through its opposite ends; the first cavity having a first opening end and a second opening end disposed opposite to each other along a first direction; the outer contour of the first portion being smoothly disposed; the outer contour of the first portion forming a first closed region in each plane perpendicular to the first direction, and the area of ​​the first closed region increasing sequentially along the direction from the first opening end to the second opening end.

[0008] According to some embodiments of this disclosure, the inner wall surface of the first cavity is smoothly disposed 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.

[0009] According to some embodiments of this disclosure, the first portion has the same wall thickness.

[0010] According to some embodiments of this disclosure, the first closed region is a rectangular region, and the second closed region is a rectangular region.

[0011] According to some embodiments of this disclosure, 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 the third direction is perpendicular to both the second direction and the first direction;

[0012] 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.

[0013] According to some embodiments of this disclosure, 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.

[0014] According to some embodiments of this disclosure, 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.

[0015] According to some embodiments of this disclosure, the coil frame further includes a third portion, which extends from the outer contour of the first portion in a direction away from the first portion, and the third portion and the stepped surface are spaced apart in the first direction.

[0016] According to some embodiments of this disclosure, the coil frame is a one-piece molded structure.

[0017] According to another aspect of this disclosure, a relay is also provided, including a coil assembly and an armature, the coil assembly including a coil frame and a coil wound on the surface of the coil frame, characterized in that the coil frame is the coil frame described in this disclosure, the armature passes through a first cavity of a first portion of the coil frame, a first open end of the coil frame is close to the fulcrum end of the armature, a second open end of the coil frame is close to the swing end of the armature; and the coil is wound on the outer surface of the first portion.

[0018] According to some embodiments of this disclosure, the outer contour of the first part of the coil frame 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 is also perpendicular to the swing plane of the armature, and the third direction is perpendicular to both the second direction and the first direction.

[0019] 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.

[0020] According to some embodiments of this disclosure, 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.

[0021] According to some embodiments of this disclosure, the coil frame further includes a third portion extending from the outer contour of the first portion in a direction away from the first portion, and the third portion and the stepped surface are spaced apart in the first direction to limit the other end of the coil.

[0022] According to another aspect of this disclosure, an embodiment of this disclosure provides a coil frame, comprising: a first portion having a first cavity extending through its opposite sides and used for inserting an armature; along a first direction, the first cavity having a first open end and a second open end disposed opposite to each other, the first open end being used to approach the fulcrum end of the armature, and the second open end being used to approach the swing end of the armature; the outer contour of the first portion being smoothly disposed for winding a coil; the outer contour of the first portion forming a first closed region in each plane perpendicular to the first direction, and the area of ​​the first closed region increasing sequentially along the direction from the first open end to the second open end.

[0023] According to some embodiments of this disclosure, the inner wall surface of the first cavity is smoothly disposed 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.

[0024] According to some embodiments of this disclosure, the first portion has the same wall thickness.

[0025] According to some embodiments of this disclosure, the first closed region is a rectangular region, and the second closed region is a rectangular region.

[0026] According to some embodiments of this disclosure, 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 the second direction is configured to be perpendicular to the swing plane of the armature, and the third direction is perpendicular to the second direction and the first direction;

[0027] 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.

[0028] According to some embodiments of this disclosure, 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.

[0029] According to some embodiments of this disclosure, 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.

[0030] According to some embodiments of this disclosure, the coil frame further includes a third portion extending from the outer contour of the first portion in a direction away from the first portion, and the third portion and the stepped surface are spaced apart in the first direction to limit the other end of the coil.

[0031] According to some embodiments of this disclosure, the coil frame is a one-piece molded structure.

[0032] According to another aspect of this disclosure, a relay is also provided, including a coil holder as provided in any of the above-described technical solutions.

[0033] One embodiment disclosed above has at least the following advantages or beneficial effects:

[0034] 1. The first part of the coil holder provided in this disclosure has a smooth outer contour, which facilitates winding operations on the surface of the coil holder, thereby improving winding uniformity and the firmness of coil winding. The outer contour of the first part of the coil holder provided in this disclosure is designed as a trapezoidal structure, which ensures that the armature can swing freely inside while reducing the volume occupied by the coil holder, thereby increasing the external winding space, facilitating the increase of the number of coil turns, and increasing the attraction ampere-turns. Furthermore, after the electromagnetic attraction force generated by the coil wound on the surface of the coil holder is increased, the parameter stability of the relay can be improved, and the difference in action and reset voltage caused by the reaction force deviation can be reduced.

[0035] 2. In this disclosure, 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 changes in the same way as the area of ​​the first closed region, that is, it increases uniformly, so as to facilitate the armature passing through the first cavity and improve the swing freedom of the armature, and avoid the armature being restricted by the inner wall surface of the first cavity when swinging, which would affect the structural performance of the relay.

[0036] 3. The wall thickness of the first part in this disclosure is the same to reduce the difficulty of preparation.

[0037] 4. In this disclosure, 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.

[0038] 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 disclosure, by reducing the distance between the second outer surface and the fourth outer surface in the plane where the first open end is located, can make full use of space without affecting the armature's swing freedom, thereby increasing the winding ampere-turns, increasing the electromagnetic attraction force generated by the coil, and improving the stability of relay parameters. Attached Figure Description

[0039] Figure 1 shows a schematic diagram of the coil frame provided in an embodiment of this disclosure;

[0040] Figure 2 shows an exploded view of the coil frame and armature provided in an embodiment of this disclosure;

[0041] Figure 3 shows a schematic diagram of the structure of the coil frame and armature after assembly according to an embodiment of the present disclosure;

[0042] Figure 4 shows a simplified schematic diagram of the first part of Figure 1;

[0043] Figure 5 shows a plan view of the structure in Figure 3;

[0044] Figure 6 shows a planar schematic of the structure in Figure 3 from another angle;

[0045] Figure 7 shows a cross-sectional view at point AA in Figure 5;

[0046] Figure 8 shows an enlarged schematic diagram of point B in Figure 7;

[0047] Figure 9 shows another schematic diagram of the first part of the coil frame provided in the embodiments of this disclosure.

[0048] The reference numerals in the attached drawings are explained as follows: 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; M1, first open end; M2, second open end. Detailed Implementation

[0049] 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, they are provided so that this disclosure 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.

[0050] This disclosure 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, 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.

[0051] 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.

[0052] It is worth noting that the coil holder in the relay provided in this disclosure embodiment can be any of the following technical solutions.

[0053] This disclosure provides a coil frame. Figure 1 shows a structural schematic diagram of the coil frame 100 provided in this disclosure embodiment; Figure 2 shows an exploded schematic diagram of the coil frame 100 and armature 200 provided in this disclosure embodiment; Figure 3 shows a structural schematic diagram of the coil frame 100 and armature 200 after assembly. Referring to the structure shown in Figure 1 in conjunction with Figures 2 and 3, the coil frame 100 includes: a first part 110, the first part 110 having a first cavity C1 extending through its opposite sides for passing through the armature 200. Figure 4 shows a simplified schematic diagram of the first part 110 in Figure 1; referring to the structure shown in Figure 4 in conjunction with Figure 1, along a first direction, the first cavity C1 has a first opening end M1 and a second opening end M2 disposed opposite to each other, the first opening end M1 being used to approach the fulcrum end of the armature 200, and the second opening end M2 being used to approach the swing end of the armature 200. It is worth noting that in the above figures, direction X represents the first direction, and this first direction is parallel to the arrangement direction of the first opening end M1 and the second opening end M2.

[0054] Please refer to the structures shown in Figures 1 to 4. The outer contour of the first part 110 is smoothly designed for winding the coil. It should be understood that "smooth outer contour" means that the surface of the outer contour is relatively flat, without any 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".

[0055] 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.

[0056] Please continue referring to the structures shown in Figures 1 to 4. The outer contour of the first part 110 forms a first closed region in each plane perpendicular to the first direction. Along the direction from the first opening end M1 to the second opening end M2, the area of ​​the first closed region increases sequentially, making the first part as a whole approximately trapezoidal frustum in cross-section. The sequential increase in the area of ​​the first closed region is relative and may not be a completely linear growth.

[0057] 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. As shown in Figure 3, since the armature 200 protrudes from the first part 110 at both ends when it passes through the coil frame 100, the swing amplitude of the armature 200 at the first open end M1 will be smaller than the swing amplitude of the armature 200 at the second open end M2. Accordingly, the area of ​​the first closed region closer to the first open end M1 in the first direction can be designed to be smaller. In other words, the area of ​​the first closed region is the smallest in the plane where the first open end M1 is located, and the area of ​​the first closed region is the largest in the plane where the second open end M2 is located, so that the entire first part 110 forms a structure similar to a trapezoidal truncated cone.

[0058] 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 force 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.

[0059] Therefore, the coil holder 100 provided in this 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 enhancement of the electromagnetic attraction generated by the coil, and the improvement of relay parameter stability.

[0060] When applying the coil holder 100 provided in this embodiment, the cross-sectional dimensions of the outer contour of the first portion 110 at the second open end M2 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 M2 to the first open end M1. Compared with the coil holder in the related art, calculations show that the coil holder 100 provided in this embodiment can increase the coil ampere-turns value by more than 20% after winding the coil. In general, the coil holder 100 provided in this embodiment can fully optimize the spatial structure to increase the winding ampere-turns and increase the electromagnetic attraction force generated by the coil without increasing the external dimensions and volume of the coil holder 100, thereby improving the stability of relay parameters.

[0061] 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, referring to the structure shown in Figure 7 in conjunction with Figures 5 and 6, the inner wall surface forming the first cavity C1 is smoothly configured along the first direction. It should be understood that "smooth inner wall surface" means that the surface of the inner wall surface is relatively flat, without protrusions or depressions. Of course, when the processing technology causes minor structural deformation on the surface of the inner wall surface, and this minor structural deformation does not affect the overall use, the inner wall surface is also considered "smooth".

[0062] Referring to Figures 7 and 5, the inner wall of the first cavity C1 forms 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 M1 to the second opening end M2. However, this sequential increase in area is relative and may not be a perfectly linear growth.

[0063] It should be noted that, along the direction from the first opening end M1 to the second opening end M2, the area change pattern of the second closed region in this embodiment is the same as that of the first closed region, that is, it increases uniformly, so as to facilitate the armature 200 to pass through the first cavity C1 and improve the swing freedom of the armature 200, so as to avoid the armature 200 being restricted by the inner wall surface of the first cavity C1 when swinging, thus affecting the structural performance of the relay.

[0064] In one embodiment, the first portion 110 has a uniform wall thickness to reduce manufacturing difficulty. Exemplarily, the coil frame 100 provided in this embodiment can be injection molded.

[0065] Please continue referring to the structure shown in Figure 2. The armature 200 is elongated. To accommodate the shape of the armature 200 and make efficient use of space, in one embodiment, please refer to the structure shown in Figure 4. The first closed region is a rectangular region, and the second closed region is a rectangular region. It is worth noting that when forming the first part 110, a curved chamfer may be provided to increase the smoothness of the outer contour and facilitate coil winding. Accordingly, the first closed region may not be a strictly rectangular region, and there may be a curved transition between adjacent sides at the connection point. Similarly, the second closed region may not be a strictly rectangular region, and there may be a curved transition between adjacent sides at the connection point.

[0066] In a specific embodiment, referring to the structure shown in Figures 3 and 4, the outer contour of the first part 110 includes a first outer surface S1, a second outer surface S2, a third outer surface S3, and a fourth outer surface S4 connected in sequence. The first outer surface S1 and the third outer surface S3 are positioned opposite each other in a second direction, and 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. As shown in Figure 3, the swing end of the armature 200 can swing along the direction of the dashed arrow. During the swinging process, the armature 200 will move within this plane. As shown in Figure 3, the height direction of the armature 200 is perpendicular to the swing plane.

[0067] Please continue referring to the structures shown in Figures 3 and 4. The armature 200 is inserted into 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 swing direction of the armature 200. 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 consistent with the length direction of the armature 200, direction Z is consistent with the height direction of the armature 200, and direction Y is consistent with the thickness direction of the armature 200.

[0068] In a specific embodiment, referring to the structures shown in Figures 4 and 7, along the direction from the first opening end M1 to the second opening end M2, the first outer surface S1 and the third outer surface S3 are equidistant 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). It should be understood that the first portion 110 in this embodiment of the present disclosure only undergoes dimensional changes in the third direction. For example, as shown in Figure 4, the distance y1 between the second outer surface S2 and the fourth outer surface S4 in the plane containing the first opening end M1 is less than the distance y2 between the second outer surface S2 and the fourth outer surface S4 in the plane containing the second opening end M2, and the distance z1 between the first outer surface S1 and the third outer surface S3 in the plane containing the first opening end M1 is equal to the distance z2 between the first outer surface S1 and the third outer surface S3 in the plane containing the second opening end M2.

[0069] It should be noted that, since the first open end M1 is close to the fulcrum of the armature 200's rotation, the swing amplitude of the armature 200 at the first open end M1 is small. Compared to the second open end M2, this embodiment of the present disclosure, by reducing the distance between the second outer surface S2 and the fourth outer surface S4 in the plane where the first open end M1 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.

[0070] In another specific embodiment, referring to the structure shown in FIG9, along the direction from the first opening end M1 to the second opening end M2, the distance between the first outer surface S1 and the third outer surface S3 in the second direction (i.e., direction Z) gradually increases, and the distance between the second outer surface S2 and the fourth outer surface S4 in the third direction (i.e., direction Y) gradually increases. For example, as shown in FIG9, the distance dimension y1 between the second outer surface S2 and the fourth outer surface S4 in the plane where the first opening end M1 is located is less than the distance dimension y2 between the second outer surface S2 and the fourth outer surface S4 in the plane where the second opening end M2 is located, and the distance dimension z1 between the first outer surface S1 and the third outer surface S3 in the plane where the first opening end M1 is located is less than the distance dimension z2 between the first outer surface S1 and the third outer surface S3 in the plane where the second opening end M2 is located.

[0071] 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.

[0072] 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.

[0073] In one embodiment, referring to the structures shown in Figures 1 to 3, the coil frame 100 provided in this embodiment further includes a second part 120 connected to the first part 110. The second part 120 is provided with a second cavity C2 as shown in Figures 7 and 8. The second cavity C2 communicates with the first cavity C1 through a first opening end M1. 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 a 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, thereby improving the stability of the coil after winding and thus improving the structural performance of the relay.

[0074] As shown in Figure 1, the second part 120 may be provided with several fixing slots to install the lead pins of the connecting coil and output signals, which will not be described in detail here.

[0075] In one embodiment, referring to the structures shown in Figures 7 and 8, 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.

[0076] Please continue to refer to the structure shown in Figure 8. The inner wall surface of the second cavity C2 and the inner wall surface of the first cavity C1 are provided with a chamfer P at the connection position. This chamfer P can facilitate the insertion of the armature 200 from the second cavity C2 into the first cavity C1, thereby reducing the assembly difficulty.

[0077] In one embodiment, referring to the structure shown in Figures 1 to 3, the coil frame 100 provided in this embodiment further includes a third portion 130. The third portion 130 extends from the outer contour of the first portion 110 in a direction away from the first portion 110. The third portion 130 and the stepped surface are spaced apart in the first direction (i.e., direction X) to limit the other end of the coil, prevent the coil from coming off from that side, further improve the stability of the coil after winding, and thus improve the structural performance of the relay.

[0078] In one embodiment, the coil frame 100 is a one-piece molded structure to reduce the difficulty and cost of manufacturing.

[0079] Finally, it should be noted that the various embodiments / implementations provided in this disclosure can be combined with each other without creating contradictions, and will not be described in detail here.

[0080] In the disclosed embodiments, 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 expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" 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 disclosed embodiments according to the specific circumstances.

[0081] In the description of the disclosed 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 accompanying drawings. They are only for the convenience of describing the disclosed 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 disclosed embodiments.

[0082] 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 disclosed embodiments. 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.

[0083] The above are merely preferred embodiments of the disclosed embodiments and are not intended to limit the disclosed embodiments. For those skilled in the art, the disclosed embodiments can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the disclosed embodiments should be included within the protection scope of the disclosed embodiments.

Claims

1. A coil holder, characterized in that, include: The first part has a first cavity extending through its opposite ends; 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 outer contour of the first part is smoothly disposed; 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, 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 the third direction is perpendicular to both 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 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.

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.

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

10. A relay comprising a coil assembly and an armature, the coil assembly comprising a coil frame and a coil wound around the surface of the coil frame, characterized in that, The coil frame is as described in any one of claims 1-9, the armature passes through the first cavity of the first part of the coil frame, the first open end of the coil frame is close to the fulcrum end of the armature, and the second open end of the coil frame is close to the swing end of the armature; the coil is wound around the outer surface of the first part.

11. The relay according to claim 10, characterized in that, The outer contour of the first part of the coil frame 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 arranged opposite to each other in a second direction. The second outer surface and the fourth outer surface are arranged opposite to each other in a third direction. The second direction is perpendicular to the first direction and is also perpendicular to the swing plane of the armature. The third direction is perpendicular to both 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.

12. The relay according to claim 10 or 11, 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.

13. The relay according to claim 12, 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.

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