Double-coil relay

Abstract

The utility model relates to the technical field of switching devices, in particular to a double-coil relay which comprises a shell and a base, the shell and the base are matched to form a containing cavity, a first coil assembly and a second coil assembly which are axially stacked are arranged in the containing cavity, the first coil assembly abuts against the inner side face of the shell, lateral limiting is formed on the first coil assembly, and the second coil assembly abuts against the inner side face of the shell. The first coil assembly further abuts against the inner end face of the shell, the second coil assembly is inserted into the first coil assembly so that the first coil assembly and the second coil assembly can be relatively fixed in the lateral direction, the second coil assembly abuts against the base, and therefore axial limiting of the first coil assembly and the second coil assembly is formed. Lateral limiting of the first coil assembly is formed by abutting the first coil assembly against the shell, and limiting of the two coil assemblies is formed by matching the first coil assembly and the second coil assembly with the shell and the base in the axial direction, so that the stability of the two coil assemblies is improved, and the working reliability and stability of the relay are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of switch electrical appliances, in particular to a double-coil relay. Background Art

[0002] There are multiple arrangements of the two coils of a dual-coil relay, some are nested inside and outside, and some are stacked along the axial direction of the coils. Stacking the two coils in the axial direction makes the overall axial height higher, which is not good for the stability of the coils, especially when the operating conditions are complex and the vibration is large. The coils may shift during use, which in turn affects the contact action and reduces the reliability and stability of the relay.

[0003] Therefore, there is an urgent need for a reliable fixing method to fix the coil to make it more stable. Summary of the invention

[0004] The purpose of the utility model is to provide a double-coil relay to solve the above-mentioned technical problems and improve the stability of the coils and the reliability of the relay.

[0005] To achieve the above purpose, the technical solution of the utility model is:

[0006] A double-coil relay comprises a shell with an opening at one end and a base arranged at the opening, the shell and the base cooperate to form an accommodating cavity, and an axially stacked first coil assembly and a second coil assembly are arranged in the accommodating cavity, the inner surface of the shell facing the opening is defined as an inner end surface, and the inner surface of the shell facing the opening is defined as an inner side surface, the first coil assembly abuts against the inner side surface of the shell to form a lateral limit for the first coil assembly, the first coil assembly also abuts against the inner end surface of the shell, the second coil assembly is plugged into the first coil assembly so that the two are relatively fixed in the lateral direction, and the second coil assembly abuts against the base, thereby forming an axial limit for the first coil assembly and the second coil assembly.

[0007] In one embodiment, the inner end surface of the housing is provided with a first protrusion, and the first coil assembly abuts against the inner end surface of the housing by abutting against the first protrusion.

[0008] In one embodiment, two opposite inner side surfaces of the shell are respectively provided with second protrusions, the first coil assembly is provided with grooves corresponding to the second protrusions, and the first coil assembly abuts against the inner side surface of the shell through the abutment cooperation between the second protrusions and the grooves.

[0009] In one embodiment, the groove is a rectangular groove, and the second protrusion includes two convex strips arranged at intervals, and the two convex strips protrude into the groove, one of which is in contact with the bottom wall and one side wall of the rectangular groove, and the other convex strip is in contact with the bottom wall and the other side wall of the rectangular groove, so that the groove and the second protrusion cooperate to form a lateral limit of the first coil assembly.

[0010] In one embodiment, the first coil assembly includes a first coil body, a first magnetic conductive plate and a first yoke that are fixedly connected, and the groove is disposed on the first magnetic conductive plate.

[0011] In one embodiment, the second protrusion abuts against a side wall of the first yoke; the second coil assembly is provided with a second yoke, and the second protrusion abuts against a side wall of the second yoke.

[0012] In one embodiment, the first coil assembly includes a first yoke, the second coil assembly is provided with a second coil body, the second coil body is provided with a plug-in hole facing the first yoke, the first yoke is provided with a plug-in portion extending toward the second coil body, and the plug-in portion is plugged into the plug-in hole to form a connection between the first coil assembly and the second coil assembly.

[0013] In one embodiment, the first yoke is provided with a metal sheet protruding outward, and the metal sheet is bent toward the direction where the second coil body is located to form the plug-in portion.

[0014] In one embodiment, a protruding structure is provided on the side of the plug-in portion, and the protruding structure forms an interference fit with the plug-in hole.

[0015] In one embodiment, a plurality of the plug-in parts are provided, and the plurality of the plug-in parts are arranged at intervals on the edge of the first yoke, so that the first coil assembly and the second coil assembly form a relatively fixed limit in the lateral direction.

[0016] The beneficial effects of the utility model are:

[0017] 1. The lateral limit of the first coil assembly is formed by abutting against the shell, and the lateral limit of the second coil assembly is formed by axially plugging the second coil assembly with the first coil assembly. The axial limit of the two coil assemblies is formed by the axial cooperation of the first coil assembly and the second coil assembly with the shell and the base, thereby improving the stability of the two coil assemblies, and then improving the reliability and stability of the relay operation.

[0018] 2. The housing forms abutment with the first coil assembly by means of the first convex portion and the second convex portion arranged on the inner surface thereof, thereby reducing the abutment surface, which is beneficial to further improve the stability of the first coil assembly.

[0019] 3. The first coil assembly and the second coil assembly are relatively fixed in the lateral direction through a plurality of plug-in parts arranged at intervals on the edge of the first yoke, and the plug-in parts are provided with protruding structures to improve the plug-in strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereogram of an embodiment of the utility model.

[0021] Figure 2 It is a cross-sectional view of an embodiment of the utility model Figure 1 .

[0022] Figure 3 It is a cross-sectional view of an embodiment of the utility model Figure 2 .

[0023] Figure 4 It is a cross-sectional view of an embodiment of the utility model Figure 3 .

[0024] Figure 5 It is a shell structure diagram of an embodiment of the utility model.

[0025] Figure 6 It is a structural diagram of the second coil body of an embodiment of the utility model.

[0026] Figure 7 It is a structural diagram of the first yoke of an embodiment of the utility model.

[0027] Among them: 1 shell, 11 first protrusion, 12 second protrusion, 100 accommodating cavity, 101 inner end surface, 102 inner side surface, 2 base, 3 first coil assembly, 31 first coil body, 32 first magnetic conductive plate, 33 first yoke, 331 plug-in part, 332 protruding structure, 301 groove, 4 second coil assembly, 41 second coil body, 411 plug-in hole, 412 plug-in column, 42 second magnetic conductive plate, 43 second yoke. DETAILED DESCRIPTION

[0028] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] See also Figures 1 to 4As shown, the utility model discloses a double-coil relay, comprising a shell 1 with an opening at one end and a base 2 arranged at the opening, the shell 1 and the base 2 cooperate to form an accommodating cavity 100, and an axially stacked first coil component 3 and a second coil component 4 are arranged in the accommodating cavity 100, and the inner surface of the shell 1 facing the opening is defined as an inner end surface 101, and the inner surface of the shell 1 facing the opening is defined as an inner side surface 102, the first coil component 3 abuts against the inner side surface 102 of the shell 1, forming a lateral limit for the first coil component 3, the first coil component 3 also abuts against the inner end surface of the shell 1, the second coil component 4 is inserted into the first coil component 3 so that the two are relatively fixed in the lateral direction, and the second coil component 4 abuts against the base 2, thereby forming an axial limit for the first coil component 3 and the second coil component 4.

[0030] The lateral limit of the first coil assembly 3 is formed by its abutment with the housing 1, and the second coil assembly 4 is inserted into the first coil assembly 3 to form a lateral relative fixation between the two, thereby forming a lateral limit of the second coil assembly 4. The axial limit of the two coil assemblies is formed by the cooperation of the first coil assembly 3 and the second coil assembly 4 with the housing 1 and the base 2 in the axial direction, thereby improving the stability of the two coil assemblies, thereby improving the reliability and stability of the relay operation.

[0031] See also Figures 2 to 5 As shown, the inner end face 101 of the housing 1 is provided with a first convex portion 11, and the first coil assembly 3 abuts against the inner end face 101 of the housing 1 by abutting against the first convex portion 11. Compared with the inner end face 101 of the housing 1 directly abutting against the first coil assembly 3, the inner end face 101 of this example abuts against the first coil assembly 3 indirectly through the first convex portion 11, so that the contact surface between the housing 1 and the first coil assembly 3 is smaller, which can prevent the first coil assembly 3 from shaking due to the uneven inner end face 101, and improve the axial stability of the two coil assemblies.

[0032] Two opposite inner side surfaces 102 of the housing 1 are respectively provided with second protrusions 12, and the first coil assembly 3 is provided with a groove 301 corresponding to the second protrusion 12. The first coil assembly 3 abuts against the inner side surface 102 of the housing 1 through the abutment and cooperation between the second protrusion 12 and the groove 301. Compared with the inner side surface 102 of the housing 1 directly abutting against the first coil assembly 3, the inner side surface 102 of this example abuts against the first coil assembly 3 indirectly through the second protrusion 12, so that the contact surface between the housing 1 and the first coil assembly 3 is smaller, which can prevent the first coil assembly 3 from shaking due to the uneven inner side surface 102, and improve the lateral stability of the two coil assemblies. In addition, the cooperation of the groove 301 and the second protrusion 12 can form abutment with the bottom wall and the side wall of the groove, respectively, so as to form sufficient limit in the lateral direction of the coil assembly. The periphery of the first coil assembly in this example is roughly a rectangular structure, so it can form limit in the four directions of the front, back, left and right of the first coil assembly 3. More specifically, the groove 301 is a rectangular groove, and the second convex portion 12 includes two convex strips arranged at intervals, and the two convex strips protrude into the groove 301, wherein one convex strip abuts against the bottom wall and one side wall of the rectangular groove, and the other convex strip abuts against the bottom wall and the other side wall of the rectangular groove, so that the groove 301 cooperates with the second convex portion 12 to form a lateral limit of the first coil assembly 3. Since the width of the groove 301 is relatively wide, the use of two convex strips arranged at intervals to cooperate with it can reduce the thickness of the convex strip, so that the thickness of the convex strip is close to the wall thickness of the entire shell, and prevents manufacturing defects such as concave bubbles from being formed at the second convex portion 12. In other embodiments, the groove 301 and the second convex portion 12 can also be other shapes, such as arc-shaped, and the arc-shaped groove and the arc-shaped convex strip abut.

[0033] The first coil assembly 3 includes a first coil body 31, a first magnetic conductive plate 32 and a first yoke 33 which are fixedly connected, and a groove 301 is arranged on the first magnetic conductive plate 32. Laterally, the first magnetic conductive plate 32 is protruding relative to the first coil body 31 and the first yoke 33, so arranging the groove 301 on the first magnetic conductive plate 32 can reduce the impact on the structure of the first yoke 33 and the first coil body 31, and can also ensure the reliable contact between the first coil assembly 3 and the housing 1. In addition, the first magnetic conductive plate 32 is generally made of a metal magnetic conductive material, and the first coil body 31 is formed by a coil frame and an enameled wire wound on the coil frame, and the coil frame is made of plastic material, and its strength is lower than that of the first magnetic conductive plate made of metal, so arranging the groove on the first magnetic conductive plate 32 can increase its connection strength with the housing 1.

[0034] The second coil assembly 4 includes a second coil body 41, a second magnetic conductive plate 42 and a second yoke 43. The second protrusion 12 extends along the axial direction of the second coil assembly 4, and the protrusion height of the second protrusion 12 makes it abut against the side walls of the first yoke 33 and the second yoke 43, thereby increasing the lateral stability of the first coil assembly 3 and the second coil assembly 4. In this example, since the widths of the first yoke 33 and the second yoke 43 are different, the protrusion amounts of the second protrusion 12 at the positions corresponding to the first yoke 33 and the second yoke 43 are also different, so the second protrusion 12 of this example has a step in its extension direction.

[0035] See also Figure 2 , Figure 6 and Figure 7 As shown, in this example, the plug-in connection between the first coil assembly 3 and the second coil assembly 4 is formed by the plug-in fit of the second coil body 41 and the first yoke 33. The second coil body 41 is provided with a plug-in hole 411 facing the first yoke 33, and the first yoke 33 is provided with a plug-in portion 331 extending toward the second coil body 41, and the plug-in portion 331 is plugged into the plug-in hole 411 to form the plug-in connection between the first coil assembly 3 and the second coil assembly 4. The first yoke 33 is made of a metal magnetic conductive material, and is provided with a metal sheet protruding outward, and the metal sheet is bent toward the direction where the second coil body 41 is located to form the plug-in portion 331. A protruding structure 332 is provided on the side of the plug-in portion 331, and the protruding structure 332 forms an interference fit with the plug-in hole 411. The protruding structure 332 in this example is a triangular structure. In other embodiments, the shape of the protruding structure 332 can also be rectangular or arc-shaped. The second coil body 41 is formed by a coil frame and an enameled wire wound on the coil frame, and the coil frame is made of plastic material, so the metal plug-in portion 331 is plugged into the plug-in hole 411 made of plastic material, and the protruding structure of the plug-in portion 331 can deform the plug-in hole 411 made of plastic material, thereby increasing the plug-in strength. The coil frame of the second coil body 41 is provided with a plug-in column 412, and the plug-in hole 411 is formed in the plug-in column 412. The existence of the plug-in column 412 can extend the length of the plug-in hole 411, increase the plug-in length, and thus increase the connection strength.

[0036] There are multiple plug-in parts 331, and the multiple plug-in parts 331 are arranged at intervals on the edge of the first yoke 33, so that the first coil assembly 3 and the second coil assembly 4 form a relatively fixed limit in the lateral direction. In this example, four plug-in parts 331 are provided, and the four plug-in parts 331 are arranged at intervals; in other embodiments, two or three plug-in parts can also be arranged at intervals, so that only the first coil assembly 3 and the second coil assembly 4 can form a relatively fixed limit in the lateral direction.

[0037] See also Figure 2As shown, the first magnetic conductive plate 32 of the first coil assembly 3 abuts against the first protrusion 11, thereby forming the first coil assembly 3 abutting against the inner end surface of the outer shell 1, and the second magnetic conductive plate 42 of the second coil assembly 4 abuts against the base 2, thereby forming the second coil assembly 4 abutting against the base 2, and then the first coil assembly 3 and the second coil assembly 4 are combined with the plug-in cooperation to form the axial limitation of the first coil assembly 3 and the second coil assembly 4.

[0038] Although the present invention is specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed portions are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. A double-coil relay, comprising a housing with an opening at one end and a base arranged at the opening, wherein the housing and the base cooperate to form an accommodating cavity, wherein a first coil assembly and a second coil assembly axially stacked are arranged in the accommodating cavity, characterized in that: The inner surface of the shell facing the opening is defined as the inner end surface, and the inner surface of the shell facing the opening is defined as the inner side surface. The first coil component abuts against the inner side surface of the shell to form a lateral limit for the first coil component. The first coil component also abuts against the inner end surface of the shell. The second coil component is inserted into the first coil component so that the two are relatively fixed in the lateral direction, and the second coil component abuts against the base to form an axial limit for the first coil component and the second coil component.

2. A double coil relay according to claim 1, characterized in that: The inner end surface of the housing is provided with a first protrusion, and the first coil component abuts against the inner end surface of the housing by abutting against the first protrusion.

3. A double coil relay according to claim 1, characterized in that: Two opposite inner side surfaces of the shell are respectively provided with second protrusions, the first coil component is provided with grooves corresponding to the second protrusions, and the first coil component abuts against the inner side surface of the shell through the abutment cooperation between the second protrusions and the grooves.

4. A double coil relay according to claim 3, characterized in that: The groove is a rectangular groove, and the second convex portion includes two convex strips arranged at intervals, and the two convex strips protrude into the groove, one of which is in contact with the bottom wall and one side wall of the rectangular groove, and the other convex strip is in contact with the bottom wall and the other side wall of the rectangular groove, so that the groove and the second convex portion cooperate to form a lateral limit of the first coil assembly.

5. A double-coil relay according to claim 3 or 4, characterized in that: The first coil assembly includes a first coil body, a first magnetic conductive plate and a first yoke that are fixedly connected, and the groove is arranged on the first magnetic conductive plate.

6. A double-coil relay according to claim 5, characterized in that: The second protrusion abuts against the side wall of the first yoke; the second coil assembly is provided with a second yoke, and the second protrusion abuts against the side wall of the second yoke.

7. A double-coil relay according to claim 1, characterized in that: The first coil assembly includes a first yoke, the second coil assembly is provided with a second coil body, the second coil body is provided with a plug-in hole facing the first yoke, the first yoke is provided with a plug-in portion extending toward the second coil body, and the plug-in portion is plugged into the plug-in hole to form a connection between the first coil assembly and the second coil assembly.

8. A double-coil relay according to claim 7, characterized in that: The first yoke is provided with a metal sheet protruding outward, and the metal sheet is bent toward the direction where the second coil body is located to form the plug-in portion.

9. A double-coil relay according to claim 7 or 8, characterized in that: A protruding structure is provided on the side of the plug-in portion, and the protruding structure forms an interference fit with the plug-in hole.

10. A double-coil relay according to claim 7 or 8, characterized in that: There are a plurality of the plug-in parts, and the plurality of the plug-in parts are arranged at intervals on the edge of the first yoke, so that the first coil assembly and the second coil assembly form a relatively fixed limit in the lateral direction.

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