End cover, electric assembly and electric appliance

Abstract

The present application provides an end cover, an electric assembly and an electric appliance, and relates to the technical field of electric appliances. The end cover is used for the electric assembly, and comprises a body and a bearing chamber, wherein the bearing chamber is annularly arranged, a first side of the bearing chamber is connected to the body, and a second side of the bearing chamber extends in a direction away from the body in a first direction; and the body and the bearing chamber are of an integrated structure made of a thermosetting material. The body and the bearing chamber are of the integrated structure made of the thermosetting material such that the process difficulty of the end cover during production can be reduced while the overall weight of the end cover is reduced, and the production cost of the end cover is reduced, thereby reducing the production cost of the electric assembly.

Description

End caps, electric components and electrical appliances

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 8, 2023 with application number "202311682181.6", and the priority to the Chinese patent application filed with the China Patent Office on December 8, 2023 with application number "202323348457.5", all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of electrical appliance technology, and in particular to an end cover, an electric component and an electrical appliance. Background Art

[0003] Currently, motors are equipped with end caps made of metal, which are typically formed by stamping the material using a high-speed punch press and a high-precision drawing die. However, these metal end caps are heavy, affecting the weight of the motor. Technical Solutions

[0004] This application aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present application provides an end cap.

[0006] A second aspect of the present application provides an electric component.

[0007] A third aspect of the present application provides an electrical appliance.

[0008] In view of this, the first aspect of the present application provides an end cover, which is used for an electric component. The end cover includes a body and a bearing chamber. The bearing chamber is arranged in a ring shape. The first side of the bearing chamber is connected to the body, and the second side of the bearing chamber extends along a first direction away from the body; wherein the body and the bearing chamber are an integrated structure of thermosetting material.

[0009] The end cover provided in the present application is used for an electric component. The end cover can protect the electric component. The end cover includes a body and a bearing chamber. The bearing chamber is arranged in a ring shape. The first side of the bearing chamber is connected to the body, and the second side of the bearing chamber extends along the first direction away from the body; wherein the body and the bearing chamber are an integrated structure of thermosetting material, which can reduce the overall weight of the end cover while simplifying the process difficulty of the end cover in the production process, reducing the production cost of the end cover, and thus reducing the production cost of the electric component. At the same time, the integrated injection molding of the body and the bearing chamber can also improve the production efficiency of the end cover and improve the installation efficiency of the electric component. Since one side of the annular bearing chamber is connected to the body and the other side extends in the first direction, the annular structure of the bearing chamber can improve the smoothness of the bearing rotation and avoid the bearing from getting stuck during the installation and operation of the electric component.

[0010] In addition, the end cap in the above technical solution provided by this application may also have the following additional technical features:

[0011] In some technical solutions of the present application, optionally, the one-piece structure of the thermosetting material includes an one-piece structure of an unsaturated polyester bulk molding compound.

[0012] In some technical solutions of the present application, optionally, the end cover further includes connecting ribs, and the number of the connecting ribs is multiple, and the multiple connecting ribs are connected to the body and the bearing chamber, and are arranged at intervals along the outer periphery of the bearing chamber.

[0013] In some technical solutions of the present application, optionally, the connecting ribs, the body and the bearing chamber are an integrated structure.

[0014] In some technical solutions of the present application, optionally, the height of the connecting rib in the first direction is less than or equal to the height of the bearing chamber in the first direction.

[0015] In some technical solutions of the present application, optionally, the connecting rib has a first edge, a second edge and a third edge, the first edge extends along the bearing chamber, the second edge extends along the main body, and the second edge and the third edge are connected in sequence; wherein, the angle between the third edge and the surface of the side of the main body where the bearing chamber is provided is a first angle, and the first angle is greater than or equal to 120 degrees and less than or equal to 160 degrees.

[0016] In some technical solutions of the present application, optionally, the length L1 of the third edge in the second direction, the height H of the connecting rib in the first direction, and the angle θ1 of the first angle satisfy the following relationship: L1=H×tan(π-θ1).

[0017] In some technical solutions of the present application, optionally, the thickness of the connecting rib is greater than or equal to 2 mm.

[0018] In some technical solutions of the present application, optionally, the body is provided with a first groove, the first groove is arranged along the inner circumference of the bearing chamber, and the first groove is located at the connection between the body and the bearing chamber.

[0019] In some technical solutions of the present application, optionally, the depth of the first groove in the first direction is a first depth, the first depth is greater than or equal to 0.3 mm and less than or equal to 0.6 mm; the width of the first groove in the second direction is greater than or equal to 2 times the first depth and less than or equal to 3 times the first depth.

[0020] A second aspect of the present application provides an electric component, comprising an end cover as in any of the above technical solutions.

[0021] The electric component provided in the present application includes the end cover as in any of the above technical solutions, so the electric component includes all the beneficial effects of the end cover as in any of the above technical solutions.

[0022] A third aspect of the present application provides an electrical appliance, comprising an end cover as in any of the above technical solutions; or an electric component as in any of the above technical solutions.

[0023] An electrical appliance provided in the present application includes an end cover as in any of the above technical solutions; or an electric component as in any of the above technical solutions, so that the electrical appliance has all the beneficial effects of the end cover as in any of the above technical solutions, or the electric component as in any of the above technical solutions.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] FIG1 is a schematic structural diagram of an end cover according to an embodiment of the present application;

[0027] FIG2 is a cross-sectional view of an end cap according to an embodiment of the present application;

[0028] FIG3 is a second cross-sectional view of an end cap according to an embodiment of the present application;

[0029] FIG4 is a partial schematic diagram of the end cover at position C shown in FIG3 according to an embodiment of the present application.

[0030] The corresponding relationship between the reference numerals and component names in Figures 1 to 4 is as follows:

[0031] 100 end cover, 110 body, 112 first groove, 120 bearing chamber, 130 connecting rib, 132 first edge, 134 second edge, 136 third edge, 140 wire fixing tooth, 150 positioning groove. Modes for Carrying Out the Invention

[0032] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0034] The end cap 100 , the electric component and the electrical appliance according to some embodiments of the present application are described below with reference to FIG. 1 to FIG. 4 .

[0035] As shown in Figure 1, the first aspect of the present application provides an end cover 100, which is used for an electric component. The end cover 100 includes a main body 110 and a bearing chamber 120. The bearing chamber 120 is arranged in a ring shape. The first side of the bearing chamber 120 is connected to the main body 110, and the second side of the bearing chamber 120 extends along a first direction away from the main body 110; wherein the main body 110 and the bearing chamber 120 are an integrated structure of thermosetting material.

[0036] The end cover 100 provided in the present application is used for an electric component. The end cover 100 can protect the electric component. The end cover 100 includes a body 110 and a bearing chamber 120. The bearing chamber 120 is arranged in an annular shape. A first side of the bearing chamber 120 is connected to the body 110, and a second side of the bearing chamber 120 extends along a first direction away from the body 110; wherein the body 110 and the bearing chamber 120 are an integrated structure of thermosetting material, which can reduce the overall weight of the end cover 100 while simplifying the process difficulty of the end cover 100 in the production process, reducing the production cost of the end cover 100, and thereby reducing the production cost of the electric component. At the same time, the integrated injection molding of the body 110 and the bearing chamber 120 can also improve the production efficiency of the end cover 100 and improve the installation efficiency of the electric component. Since one side of the annular bearing chamber 120 is connected to the body 110 and the other side extends in the first direction, the annular structure of the bearing chamber 120 can improve the smoothness of the bearing rotation and avoid the bearing from getting stuck during the installation and operation of the electric component.

[0037] At the same time, due to the strong plasticity of thermosetting materials, the corresponding feeding ratio can be selected according to the shape and size of the end cover 100, which can improve the utilization rate of the material. At the same time, due to the high stability and insulation of thermosetting materials, anti-electrolytic corrosion components are no longer required and there is no need to perform additional conduction operations on the end cover 100, thereby reducing the cost of the electric component, reducing the operating steps of the electric component, and improving the working efficiency of the electric component.

[0038] For example, the end cover 100 may be further provided with a positioning groove 150 , which can be used to position the end cover 100 , and can also facilitate the installation of the end cover 100 and improve the overall stability.

[0039] Exemplarily, the end cover 100 may further be provided with wire fixing teeth 140 , which can be used to fix the wires of the motor, thereby improving the overall neatness and protecting the wires.

[0040] This embodiment provides an end cover 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0041] As shown in FIG. 2 and FIG. 3 , the one-piece structure of the thermosetting material includes an one-piece structure of an unsaturated polyester bulk molding compound.

[0042] In this embodiment, the one-piece structure of the thermosetting material includes an one-piece structure of unsaturated polyester bulk molding material. By setting the unsaturated polyester bulk molding material as the thermosetting material with an one-piece structure, the flame retardancy and insulation of the end cover 100 during operation can be improved, so that the end cover 100 can be anti-static during the operation of the electric component. At the same time, due to the high chemical stability of the unsaturated polyester bulk molding material, the main body 110 and the bearing chamber 120 made of the unsaturated polyester bulk molding material can prevent electrical corrosion and avoid the end cover 100 from mixing with grease, thereby improving the durability of the end cover 100, extending the service life of the end cover 100, and reducing the maintenance cost of the electric component.

[0043] At the same time, the use of an integrated structure of unsaturated polyester bulk molding compound as the integrated structure of the thermosetting material can reduce the shrinkage rate of the material after molding and cooling, and improve the manufacturing accuracy of the end cap 100.

[0044] For example, when the end cap 100 is made of unsaturated polyester bulk molding compound, the shrinkage rate of the material after molding and cooling is less than 0.005 mm, which can reduce the cost of the end cap 100 and facilitate the injection molding process of the end cap 100.

[0045] This embodiment provides an end cover 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0046] As shown in FIG. 1 and FIG. 2 , the end cover 100 further includes a plurality of connecting ribs 130 . The plurality of connecting ribs 130 are connected to the body 110 and the bearing chamber 120 and are arranged at intervals along the outer periphery of the bearing chamber 120 .

[0047] In this embodiment, the end cover 100 also includes connecting ribs 130, and the number of connecting ribs 130 is multiple. The multiple connecting ribs 130 are connected to the main body 110 and the bearing chamber 120, and are arranged at intervals along the outer periphery of the bearing chamber 120. The stability of the bearing chamber 120 can be improved by setting the connecting ribs 130, and the stability of the structure of the end cover 100 can be improved, so as to achieve the improvement of the strength of the structure of the end cover 100, facilitate the installation of the end cover 100, and extend the service life of the end cover 100.

[0048] During the injection molding process of the end cap 100, the provision of multiple connecting ribs 130 connected to the bearing chamber 120 can also improve the consistency of the shrinkage deformation of the bearing chamber 120 during the injection molding process, thereby increasing the consistency of the inner diameter of each position of the bearing chamber 120 after the injection molding is completed. During the motor installation process, the inner diameter of each position of the bearing chamber 120 is more consistent, making the internal space of the bearing chamber 120 more closely aligned with the bearing size, facilitating the installation of the bearing, reducing the risk of wear between the bearing and the bearing chamber 120, and improving the stability of the bearing during operation.

[0049] For example, the number of the connecting ribs 130 may be set according to the actual size of the end cover 100 .

[0050] For example, the size and number of the connecting ribs 130 may be adjusted according to the shrinkage ratio of the injection molding material before and after processing.

[0051] This embodiment provides an end cover 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0052] As shown in FIG. 1 and FIG. 2 , the connecting rib 130 , the body 110 and the bearing chamber 120 are an integrated structure.

[0053] In this embodiment, the connecting rib 130, the body 110 and the bearing chamber 120 are an integrated structure, which can reduce the difficulty of processing the end cover 100, thereby improving the production efficiency of the end cover 100 and reducing the number of installation steps.

[0054] This embodiment provides an end cover 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0055] As shown in FIG. 1 and FIG. 2 , the height of the connecting rib 130 in the first direction is less than or equal to the height of the bearing housing 120 in the first direction.

[0056] In this embodiment, the height of the connecting rib 130 in the first direction is less than or equal to the height of the bearing chamber 120 in the first direction, which can prevent the connecting rib 130 from protruding from the bearing chamber 120 in the first direction, thereby preventing the connecting rib 130 from interfering with the bearing chamber 120 when the electric component is working, and also avoiding interference with the bearing, thereby improving the stability of the electric component.

[0057] Exemplarily, the height of the bearing chamber 120 in the first direction is h1.

[0058] Exemplarily, as shown in FIG3 , the first direction is direction M, and the second direction is direction N.

[0059] This embodiment provides an end cover 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0060] As shown in Figures 1 and 3, the connecting rib 130 has a first edge 132, a second edge 134 and a third edge 136, the first edge 132 extends along the bearing chamber 120, the second edge 134 extends along the body 110, and the second edge 134 and the third edge 136 are connected in sequence; wherein, the angle between the third edge 136 and the surface of the body 110 on the side where the bearing chamber 120 is provided is a first angle, and the first angle is greater than or equal to 120 degrees and less than or equal to 160 degrees.

[0061] In this embodiment, the connecting rib 130 has a first edge 132, a second edge 134, and a third edge 136. The first edge 132 extends along the bearing chamber 120, the second edge 134 extends along the body 110, and the second edge 134 and the third edge 136 are sequentially connected. The angle between the third edge 136 and the surface of the body 110 on the side where the bearing chamber 120 is located is a first angle, which is greater than or equal to 120 degrees and less than or equal to 160 degrees. By setting the angle between the third edge 136 and the surface of the body 110 on the side where the bearing chamber 120 is located greater than 120 degrees, the strength between the connecting rib 130, the body 110, and the bearing chamber 120 can be improved. At the same time, limiting the first angle to greater than or equal to 120 degrees and less than or equal to 160 degrees can reduce the volume of the connecting rib 130 while maintaining structural strength, thereby reducing the weight of the connecting rib 130. This can reduce the overall weight of the end cap 100, lower the production cost of the end cap 100, and improve material utilization.

[0062] Exemplarily, the first angle may be 120 degrees, the first angle may also be 130 degrees, the first angle may also be 140 degrees, the first angle may also be 150 degrees, and the first angle may also be 160 degrees.

[0063] This embodiment provides an end cover 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0064] As shown in FIG1 , FIG2 and FIG3 , the length L1 of the third edge 136 in the second direction, the height H of the connecting rib 130 in the first direction and the first included angle θ1 satisfy the following relationship: L1=H×(π-θ1).

[0065] In this embodiment, the length L1 of the third edge 136 in the second direction, the height H of the connecting rib 130 in the first direction, and the angle θ1 of the first angle satisfy the following relationship: L1=H×(π-θ1). Therefore, by setting a size range and limiting the size relationship between the length L1 of the third edge 136 in the second direction, the height H of the connecting rib 130 in the first direction, and the angle θ1 of the first angle, the connecting rib 130 can form a triangular structure, thereby improving the stability between the connecting rib 130 and the body 110 and the bearing chamber 120, and improving the stability of the connecting rib 130. The stability of the overall structure is high, the service life of the end cover 100 is extended, and the rigidity of the end cover 100 is improved, while the production cost of the end cover 100 is reduced, thereby reducing the production cost of the electric component. At the same time, the integrated injection molding of the main body 110 and the bearing chamber 120 can also improve the production efficiency of the end cover 100 and the installation efficiency of the electric component. Since the annular bearing chamber 120 is connected to the main body 110 on one side and extends in the first direction on the other side, the annular structure of the bearing chamber 120 can improve the smoothness of the bearing rotation and avoid the bearing from getting stuck during the installation and operation of the electric component.

[0066] For example, the length L1 of the third edge 136 in the second direction, the height H of the connecting rib 130 in the first direction, and the angle θ1 of the first angle can be adjusted according to the relationship L1=H×tan(π-θ1) according to actual requirements of the end cover 100.

[0067] This embodiment provides an end cover 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0068] As shown in FIG. 1 , FIG. 2 and FIG. 3 , the thickness of the connecting rib 130 is greater than or equal to 2 mm.

[0069] In this embodiment, the thickness of the connecting rib 130 is greater than or equal to 2 mm, which can improve the strength of the connecting rib 130 while facilitating the injection molding of the end cover 100 and preventing the thickness of the connecting rib 130 from being too thin and affecting the injection molding effect of the end cover 100.

[0070] At the same time, increasing the thickness of the end cap 100 can reduce the requirements on the size of the injection molding mold of the end cap 100 .

[0071] For example, the size of the connecting rib 130 may be set according to the actual size of the end cover 100 .

[0072] This embodiment provides an end cover 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0073] As shown in FIG. 2 and FIG. 3 , the body 110 is provided with a first groove 112 . The first groove 112 is arranged along the inner circumference of the bearing chamber 120 . The first groove 112 is located at the connection between the body 110 and the bearing chamber 120 .

[0074] In this embodiment, the main body 110 is provided with a first groove 112, and the first groove 112 is arranged along the inner circumference of the bearing chamber 120. The first groove 112 is located at the connection between the main body 110 and the bearing chamber 120. The first groove 112 can provide a buffer area for the bearing chamber 120. While achieving the root cleaning of the bearing chamber 120, it avoids right angles or acute angles in the injection mold, improves the success rate of injection molding, and at the same time improves the injection molding processing effect, which facilitates the production and installation of the end cover 100.

[0075] This embodiment provides an end cover 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0076] As shown in Figures 2 and 3, the depth of the first groove 112 in the first direction is a first depth, which is greater than or equal to 0.3 mm and less than or equal to 0.6 mm; the width of the first groove 112 in the second direction is greater than or equal to 2 times the first depth and less than or equal to 3 times the first depth.

[0077] In this embodiment, the depth of the first groove 112 in the first direction is the first depth, and the first depth is greater than or equal to 0.3 mm and less than or equal to 0.6 mm; the width of the first groove 112 in the second direction is greater than or equal to 2 times the first depth and less than or equal to 3 times the first depth. By setting the size range of the first groove 112 to the width of the first groove 112 in the second direction being greater than or equal to 2 times the first depth and less than or equal to 3 times the first depth, the injection molding of the end cover 100 can be facilitated, and the processing efficiency can be improved. At the same time, the bearing chamber 120 can be prevented from affecting the positioning of the bearing, and the accuracy of the bearing positioning can be improved. At the same time, the processing technology requirements of the mold can be met, and production efficiency can be improved.

[0078] Exemplarily, as shown in FIG3 , the width of the first groove 112 in the second direction is L2.

[0079] Exemplarily, as shown in FIG4 , the first depth is t.

[0080] Exemplarily, the first depth may be 0.3 mm, the first depth may be 0.4 mm, the first depth may be 0.5 mm, and the first depth may be 0.6 mm.

[0081] A second aspect of the present application provides an electric component, comprising an end cover 100 as in any of the above embodiments.

[0082] The electric component provided in the present application includes the end cover 100 as in any of the above embodiments, and thus the electric component includes all the beneficial effects of the end cover 100 as in any of the above embodiments.

[0083] A third aspect of the present application provides an electrical appliance, comprising the end cover 100 as in any of the above embodiments; or the electric component as in any of the above embodiments.

[0084] The present application provides an electrical appliance, including the end cover 100 as in any of the above embodiments; or the electric component as in any of the above embodiments, so the electrical appliance has all the beneficial effects of the end cover 100 as in any of the above embodiments, or the electric component as in any of the above embodiments.

[0085] Illustratively, the electric component may be a motor or a compressor.

[0086] The electrical appliance may be an air conditioner, an electric fan or a refrigerator.

[0087] In the claims, specification and drawings of this application, the term "plurality" refers to two or more. Unless otherwise expressly defined, the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. They are intended only to more conveniently describe this application and simplify the description process, and are not intended to indicate or imply that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation. Therefore, these descriptions should not be understood as limiting this application. The terms "connect," "install," and "fix" should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood based on the specific circumstances of the above data.

[0088] In the claims, specification, and drawings of this application, the terms "one embodiment," "some embodiments," "a specific embodiment," and the like mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of this application. In the claims, specification, and drawings of this application, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0089] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An end cap, wherein: The end cover is used for an electric component, and the end cover comprises: ontology; A bearing chamber, wherein the bearing chamber is arranged in an annular shape, a first side of the bearing chamber is connected to the body, and a second side of the bearing chamber extends in a first direction away from the body; Wherein, the body and the bearing chamber are an integrated structure of thermosetting material.

2. The end cap according to claim 1, wherein: The one-piece structure of the thermosetting material comprises an one-piece structure of an unsaturated polyester bulk molding compound.

3. The end cap according to claim 1 or 2, wherein: The end cap also includes: Connecting ribs, the number of the connecting ribs is multiple, the multiple connecting ribs are connected to the body and the bearing chamber, and are arranged at intervals along the outer circumference of the bearing chamber.

4. The end cap according to claim 3, wherein: The connecting rib, the main body and the bearing chamber are an integrated structure.

5. The end cap according to claim 3 or 4, wherein: The height of the connecting rib in the first direction is less than or equal to the height of the bearing chamber in the first direction.

6. The end cap according to any one of claims 3 to 5, wherein: The connecting rib has a first edge, a second edge and a third edge, the first edge extends along the bearing chamber, the second edge extends along the body, and the second edge and the third edge are connected in sequence; The angle between the third edge and the surface of the body on one side where the bearing chamber is provided is a first angle, and the first angle is greater than or equal to 120 degrees and less than or equal to 160 degrees.

7. The end cap according to claim 6, wherein: The length L1 of the third edge in the second direction, the height H of the connecting rib in the first direction, and the angle θ1 of the first angle satisfy the following relationship: L1=H×tan(π-θ1).

8. The end cap according to any one of claims 3 to 7, wherein: The thickness of the connecting rib is greater than or equal to 2 mm.

9. The end cap according to any one of claims 1 to 8, wherein: The body is provided with a first groove, the first groove is arranged along the inner circumference of the bearing chamber, and the first groove is located at the connection between the body and the bearing chamber.

10. The end cap according to claim 9, wherein: The depth of the first groove in the first direction is a first depth, and the first depth is greater than or equal to 0.3 mm and less than or equal to 0.6 mm; The width of the first groove in the second direction is greater than or equal to 2 times the first depth and less than or equal to 3 times the first depth.

11. An electric component, wherein: Comprising the end cap as claimed in any one of claims 1 to 10.

12. An electrical appliance, wherein: comprising an end cap as claimed in any one of claims 1 to 10; or The electric assembly of claim 11.

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