Plug structure

Abstract

The utility model provides a plug structure, which comprises a conductive pin, an insulation structure with a corner part and a plug base, the insulation structure wraps one end of the conductive pin far away from an insertion end, the insulation structure is recessed in the plug base to form a first recessed structure, and the corner part of the insulation structure is a smooth structure. According to the plug structure provided by the utility model, the insulation structure is recessed in the plug base to form the first recessed structure, so that the diameter of the conductive pin extending out of the plug base can be kept at a small value; the corner part (not extending out of the plug base) of the insulation structure is a smooth structure and does not influence the diameter of the conductive pin which extends out of the plug base and is wrapped with the insulation material. Therefore, the structural strength of the insulation structure can be improved, and the requirement of the safety standard on the diameter of the conductive pin can be met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electronic devices, more specifically, relate to a plug structure. BACKGROUND

[0002] Plug chargers, adapters and the like need to pass safety certification such as drop test and drum test, which has high requirements for the drop resistance and structural strength of the product, especially the part of the insulating rubber coating at the root of the prong, which is usually a design difficulty. In the European plug, the prong is placed in the corresponding injection mold, and the insulating rubber coating is formed by injection molding. The whole formed by the insulating rubber coating and the prong is called a rubber-coated prong. Then the rubber-coated prong is placed in the corresponding injection mold, and the lower cover plastic main part is formed by injection molding, forming a whole lower cover finished product. The corner at the root of the rubber-coated prong is easy to break during the drop test and drum test, and if it is made into a rounded structure, it will increase the diameter of the root of the rubber-coated prong. Moreover, in the European standard, the diameter of the insulating rubber coating of the prong needs to be less than or equal to 4mm (the plug joint surface of the lower cover plastic is the demarcation line for measurement), and due to the requirements of strength and injection molding process, etc., the diameter is close to the limit of 4mm, which cannot meet the requirement of rounding at the root of the rubber-coated prong, so it is difficult to balance the requirement of structural strength and the requirement of insulating rubber coating diameter. SUMMARY

[0003] The purpose of the embodiment of the utility model is to provide a plug structure to solve the technical problem that the structural strength of the plug is high and the diameter of the insulating rubber coating is small, which is difficult to realize simultaneously in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a plug structure, which comprises a conductive prong, an insulating structure with a corner part, and a plug base. The insulating structure wraps one end of the conductive prong away from the insertion end. The plug base wraps the insulating structure. The insulating structure is recessed in the plug base to form a first concave structure. The corner part of the insulating structure is a smooth structure.

[0005] Optionally, the insulating structure comprises an insulating wrapping part and an insulating base part connected to each other. The insulating wrapping part wraps one end of the conductive prong away from the insertion end. The plug base has a first surface facing the socket. The insulating base part has a second surface. The second surface is recessed in the first surface to form the first concave structure. The insulating wrapping part has a third surface arranged circumferentially. The second surface and the third surface are smoothly connected by the smooth structure.

[0006] Optionally, the recess depth of the first concave structure is 0.3mm to 1mm.

[0007] Optionally, the smooth structure comprises a first fillet structure.

[0008] Optionally, the smooth structure comprises a second rounded corner structure, an inclined surface structure and a third rounded corner structure connected in sequence.

[0009] Optionally, the second rounded corner structure and the third rounded corner structure have the same radius.

[0010] Optionally, the smooth structure comprises a fourth rounded corner structure, a fifth rounded corner structure and a sixth rounded corner structure, the radius of the fifth rounded corner structure is different from the radius of the fourth rounded corner structure and the sixth rounded corner structure.

[0011] Optionally, the first inner recess structure comprises a fourth surface of the plug base, the second surface, the fourth surface and the first surface are connected in sequence.

[0012] Optionally, the fourth surface is perpendicular to the first surface or forms an obtuse angle with the first surface.

[0013] Optionally, the horizontal cross section of the first inner recess structure is circular, elliptical or oblong.

[0014] The plug structure has the advantages that, compared with the prior art, the plug structure comprises a conductive pin, an insulating structure and a plug base, the insulating structure is recessed in the plug base to form a first inner recess structure, the diameter of the conductive pin extending out of the plug base can be kept small, the corner part (not extending out of the plug base) of the insulating structure is a smooth structure and does not affect the diameter of the conductive pin extending out of the plug base and wrapped with the insulating material. In this way, the structural strength of the insulating structure can be improved while meeting the diameter requirement of the conductive pin according to the safety standard. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 is a sectional view of the plug structure in the related art;

[0017] Figure 2 is Figure 1 is an enlarged view of part A in FIG. 1;

[0018] Figure 3 is a perspective view of a first plug structure according to an embodiment of the present application;

[0019] Figure 4 Partially cutaway view of the first plug structure provided by the embodiment of the present application;

[0020] Figure 5 For Figure 4 Local enlarged view at B;

[0021] Figure 6 Cutaway view of the second plug structure provided by the embodiment of the present application at the root of the conductive plug;

[0022] Figure 7 Cutaway view of the third plug structure provided by the embodiment of the present application at the root of the conductive plug;

[0023] Figure 8 Top view of the first plug base provided by the embodiment of the present application;

[0024] Figure 9 Top view of the second plug base provided by the embodiment of the present application;

[0025] Figure 10 Top view of the third plug base provided by the embodiment of the present application.

[0026] In the drawings, various reference numerals refer to:

[0027] 91-brass plug; 92-insulating rubber coating; 921-rubber coating plane; 93-plastic main body of lower cover; 931-plug joint surface;

[0028] 10-conductive plug; 20-insulating structure; 21-insulating coating part; 211-third surface; 22-insulating base part; 221-second surface; 23-smooth structure; 230-first concave structure; 231-first rounded structure; 232-second rounded structure; 233-third rounded structure; 234-inclined surface structure; 30-plug base; 31-first surface; 32-fourth surface. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and apparent, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0033] The plug charger, adapter and the like need to pass the drop test and the drum test and the like safety regulation certification, which has high requirements on the anti-falling performance and structural strength of the product. Among all the plugs in all countries, the drum test of the European plug is the most demanding, with a basic requirement of one thousand times. This has high requirements on the anti-falling performance of the product, that is, the structural strength of the product, especially the strength of the plug portion (brass plug 91 and its insulating rubber 92), which is usually a design difficulty.

[0034] The standard (EN50075) of the European plug has strict provisions for the size of each part of the plug. Therefore, in the European plug of the charger, adapter product, in order to consider the standard requirements, structural strength, production and processing technology and other factors, the design structure and size in the existing industry are basically Figure 1 The structure type shown.

[0035] The lower cover of the European plug has the following general process: the brass plug 91 is placed in the corresponding injection mold, the insulating rubber 92 is injection molded and becomes a whole rubber-coated brass plug, and then the rubber-coated brass plug is placed in the corresponding injection mold, the lower cover plastic body 93 is injection molded, and a whole lower cover finished product is completed.

[0036] According to the prior art and design, the rubber-coated plane 921 of the brass plug 91 and the plug joint surface 931 (this plane is defined in the standard EN50075), the two planes are flush and closely joined together (as Figure 2 ), and the corner of the rubber coating is "without fillet". The charger, adapter of the European plug passes the corresponding safety regulation certification, drop test and drum test, and the insulating rubber 92 is not allowed to have cracking phenomenon. However, the Figure 2The corner is the weakest part in the test, that is, the position most prone to cracking. The position is the corner where the pin is connected to the plug body, and the stress is large during the test. During the production injection process and the test stress process, stress concentration is more likely to occur. Therefore, the product is more likely to fail the test due to cracking. According to the plug standard, the diameter of the insulating coating 92 of the pin is less than or equal to 4mm (measured with the "plug joint surface 931" as the boundary), and the diameter of the pin is as close to 4mm as possible due to strength and injection molding process requirements. On the basis of the existing design, if a round corner is added to the corner, the diameter of the cylindrical corner will exceed the standard limit.

[0037] The prior art mainly increases the strength and toughness of the brass pin 91 and the insulating coating 92 from the selection of the material to increase the drop resistance of the product. However, considering only the selection of the material increases the difficulty of the selection and verification process, and the verification cost, production process cost, and cost of selecting better and stronger materials will increase significantly. Moreover, when the product weight reaches a certain level, the upper limit of the product weight that can be achieved with the existing process and material is relatively small.

[0038] Therefore, the current structure design cannot meet the rounding requirement of the insulating pin root, and it is difficult to balance the structure strength requirement and the diameter requirement of the insulating coating 92.

[0039] To alleviate or solve the above technical problems, the utility model provides a new plug structure, which comprises a conductive pin 10, an insulating structure 20 and a plug base 30, the insulating structure 20 is recessed in the plug base 30 to form a first recessed structure 230, so that part of the surface of the insulating structure 20 and the plug base 30 are no longer flush, but are recessed in the plug base 30, and a smooth structure 23 is arranged at the corner part of the insulating structure 20. In this way, stress concentration at the corner part can be reduced, the structure strength can be enhanced, cracking during the drop and roller test can be avoided, the outer diameter of the insulating structure 20 extending out of the plug base 30 will not be increased, and the European size standard can be met.

[0040] The plug structure provided by the embodiment of the utility model will be described.

[0041] Please refer to Figures 3 to 7 , the plug structure comprises a conductive pin 10, an insulating structure 20 with a corner part and a plug base 30, the insulating structure 20 comprises an insulating coating part 21 and an insulating base part 22 connected to each other based on the corner part, the insulating structure 20 wraps the conductive pin 10 away from one end of the insertion end, the plug base 30 wraps the insulating structure 20, the insulating structure 20 is recessed in the plug base 30 to form a first recessed structure 230, and the corner part of the insulating structure 20 is a smooth structure 23.

[0042] The conductive pin 10 is a metal structure, and is used for insertion into a movable socket panel or a socket panel fixed on a wall or a floor. The conductive pin 10 has opposite insertion end and base end, the insertion end is used for insertion into a socket hole of a socket panel, and the base end is located in the insulating structure 20, and the conductive pin 10 is wrapped by the insulating structure 20 near the base end.

[0043] The insulating structure 20 is made of an insulating material, and is used for wrapping on a part of exposed structure of the conductive pin 10, and generally wraps near the base end (in at least some embodiments of the present application, the base end is also referred to as an end far away from the insertion end), so that the safety performance of the plug structure can be improved. The insulating structure 20 has a corner portion, and the corner portion is generally located at the base end of the conductive pin 10. The insulating structure 20 wraps at least part of the conductive pin 10, and the diameter of the conductive pin 10 wrapped by the insulating material needs to be less than or equal to 4 mm. Meanwhile, the insulating structure 20 is also wrapped by the plug base 30, and the insulating structure 20 is recessed in the plug base 30 to form a first recessed structure 230, so that the corner portion of the insulating structure 20 does not protrude from the surface of the plug base 30, and thus a smooth structure is formed at the corner portion of the insulating structure 20, and the diameter of the insulating structure 20 protruding from the surface of the plug base 30 is not affected.

[0044] The plug base 30 is a basic structure of the plug structure, and the plug base 30 wraps part of the insulating structure 20.

[0045] The plug structure in the above embodiment includes the conductive pin 10, the insulating structure 20 and the plug base 30, the insulating structure 20 is recessed in the plug base 30 to form the first recessed structure 230, so that the diameter of the conductive pin 10 protruding from the plug base 30 can be kept at a small value, the corner portion (not protruding from the plug base 30) of the insulating structure 20 is a smooth structure 23 and does not affect the diameter of the conductive pin 10 wrapped by the insulating material and protruding from the plug base 30. In this way, the structural strength of the insulating structure 20 can be improved while meeting the diameter requirement of the conductive pin 10 in the safety standard.

[0046] In some embodiments of the present application, please refer to Figures 3 to 7 , the insulating structure 20 includes an insulating wrapping portion 21 and an insulating base portion 22 connected with each other, the insulating wrapping portion 21 wraps an end of the conductive pin 10 far away from the insertion end, the plug base 30 has a first surface 31 used for facing the socket, the insulating base portion 22 has a second surface 221 recessed in the first surface 31 to form the first recessed structure 230, the insulating wrapping portion 21 has a third surface 211 arranged in a circumferential direction, and the second surface 221 and the third surface 211 are smoothly connected through the smooth structure 23.

[0047] The insulating wrapping part 21 wraps the base part of the conductive pin 10, so that at least part of the outer contour of the insulating wrapping part 21 is cylindrical, and the size of the cylindrical outer contour of the insulating wrapping part 21 needs to be less than or equal to 4 mm according to the European standard; the insulating base part 22 is connected to the outer wall of the insulating wrapping part 21, and the insulating base part 22 is fixedly connected to the plug base 30. Figure 5 The outer peripheral wall of the insulating wrapping part 21 is a third surface 211, and the upper surface of the insulating base part 22 (the view angle) is a second surface 221, the second surface 221 and the third surface 211 are smoothly connected through the smooth structure 23, and the connection of the second surface 221, the smooth structure 23 and the third surface 211 is smoothly arranged, so as to reduce stress concentration at the place (corner) and improve the structural strength of the place, reduce the possibility of cracking at the place, and pass the drop test and the drum test.

[0048] The surface of the plug base 30 facing the socket is a first surface 31 (the upper surface of the plug base 30, Figure 5 The view angle), the first surface 31 and the second surface 221 are not in the same plane, and the second surface 221 is arranged to be recessed relative to the plug base 30, so that the smooth structure 23 is located below the first surface 31, and the size of the European standard requires the size of the insulating wrapping part 21 above the first surface 31, therefore, the recess of the second surface 221 can design the smooth structure 23 below the first surface 31, increase the structural strength of the corner, and meet the size requirement of the European standard.

[0049] The insulating structure 20 and the plug base 30 can be formed by injection molding.

[0050] In some embodiments of the utility model, please refer to Figures 5 to 7 The recess depth of the first recess structure 230 is 0.3 mm to 1 mm. Figure 5 The recess depth of the first recess structure 230 is the size of the first recess structure 230 in the vertical direction.

[0051] If the recess depth of the first recess structure 230 is too small, the smooth structure 23 may be exposed, and the outer diameter requirement of the part of the insulating structure 20 extending out of the plug base 30 cannot be met. If the recess depth of the first recess structure 230 is too large, the glue thickness may be too thin, the structural strength is reduced, and the recess depth at this place is too large, which is easy to accumulate dust. Therefore, the recess depth of the first recess structure 230 is set to 0.3 mm to 1 mm.

[0052] It can be understood that the depth of the first inner recess structure 230 is the distance between the first surface 31 and the second surface 221.

[0053] In some embodiments, the depth of the first inner recess structure 230 is 0.3mm, 0.5mm, 0.7mm, 0.9mm, etc.

[0054] In some embodiments of the utility model, please refer to Figure 5 The smooth structure 23 includes the first fillet structure 231. The first fillet structure 231 can be understood as the structure formed by rounding the connection between the second surface 221 and the third surface 211.

[0055] The setting of the first fillet structure 231 can reduce the stress concentration at the corner, and thus can improve the structural strength of the insulating structure 20. Moreover, the design of the first fillet structure 231 is simple, and the production process requirement is low, and the production cost will not be increased.

[0056] The radius of the first fillet structure 231 is not limited here, and can be determined according to the specific structure design.

[0057] The smooth structure 23 can be a combination transition of a fillet or an inclined angle and a fillet. The fillet can be various types of fillets, and the inclined angle is not limited in terms of angle and size within the range that can be achieved.

[0058] In some embodiments of the utility model, please refer to Figure 6 The smooth structure 23 includes the second fillet structure 232, the inclined surface structure 234 and the third fillet structure 233 connected in sequence.

[0059] Through the combination of the two fillet structures and the inclined surface structure 234, the recessed area at the corner is smaller, the degree of recess is lighter, the stress concentration at the corner is less, and the corner is less likely to crack.

[0060] In some embodiments, the second surface 221, the second fillet structure 232, the inclined surface structure 234, the third fillet structure 233 and the third surface 211 are connected in sequence, and the inclined surface structure 234 is arranged at an obtuse angle with the second surface 221 and the third surface 211. The second fillet structure 232 can be understood as a structure formed by rounding the connection between the second surface 221 and the inclined surface structure 234, and the third fillet structure 233 can be understood as a structure formed by rounding the connection between the inclined surface structure 234 and the third surface 211. As Figure 6 shown in the cross-sectional view of the plug structure, the inclined surface structure 234 is an inclined line, and the inclined line is arranged at an obtuse angle with the second surface 221 and the third surface 211.

[0061] In some embodiments, the second rounded corner structure 232 and the third rounded corner structure 233 have the same radius. In this embodiment, the two ends of the smoothing structure 23 are completely identical rounded corner structures, which is simpler for the design of the smoothing structure 23, has lower design cost, and is easier to produce.

[0062] In some embodiments, the second rounded corner structure 232 and the third rounded corner structure 233 have different radii, and the radius of the second rounded corner structure 232 can be greater than or less than the radius of the third rounded corner structure 233.

[0063] In some embodiments, the included angle between the inclined surface structure 234 and the second surface 221 is 120 to 150 degrees. When the included angle between the inclined surface structure 234 and the second surface 221 is too large, the included angle between the inclined surface structure 234 and the third surface 211 will be too small, and vice versa. Therefore, the included angle between the inclined surface structure 234 and the second surface 221 is set to 120 to 150 degrees, for example, 130 degrees, 135 degrees, 140 degrees, etc.

[0064] In some embodiments of the utility model, the smoothing structure 23 includes a fourth rounded corner structure, a fifth rounded corner structure, and a sixth rounded corner structure, and the radius of the fifth rounded corner structure is different from the radii of the fourth rounded corner structure and the sixth rounded corner structure. That is, the smoothing structure 23 is connected by multiple rounded corner structures, which can also reduce stress concentration at small corners and adjust the radii of the rounded corner structures to make the structure at the corner stronger.

[0065] In some embodiments, the fifth rounded corner structure and the sixth rounded corner structure have the same radius, so that the smoothing structure 23 is a symmetrical structure, which is more reasonable.

[0066] In some embodiments of the utility model, please refer to Figures 3 to 7 , the first recessed structure 230 includes a fourth surface 32 of the plug base 30, and the second surface 221, the fourth surface 32, and the first surface 31 are sequentially connected. The inner wall surface of the first recessed structure 230 includes the third surface 211, the second surface 221, and the fourth surface 32, the second surface 221 is the bottom surface of the first recessed structure 230, and the smoothing structure 23 is located at the connection between the third surface 211 and the second surface 221.

[0067] In some embodiments of the utility model, the fourth surface 32 is perpendicular to the first surface 31 or forms an obtuse angle with the first surface 31. It can also be understood that, in combination with Figure 5 , the fourth surface 32 is vertically arranged or obliquely arranged. When the fourth surface 32 is perpendicular to the first surface 31, the internal space of the first recessed structure 230 is larger, and the edge of the smoothing structure 23 is farther away, so that the smoothing structure 23 does not interfere with the first recessed structure 230. When the fourth surface 32 forms an obtuse angle with the first surface 31, the plug base 30 is easier to injection mold and has higher injection molding quality.

[0068] In some embodiments, the fourth surface 32 and the first surface 31 are smoothly connected, so that the connection between them is smooth and will not scratch the user, and stress concentration can also be reduced.

[0069] Optionally, the fourth surface 32 and the first surface 31 are smoothly connected through a rounded structure.

[0070] In some embodiments of the utility model, the first inner recess structure 230 can be cylindrical or stepped (the fourth surface 32 is perpendicular to the first surface 31, which is cylindrical, and the fourth surface 32 and the first surface 31 (i.e. the plug joint surface) have a certain angle, which is stepped, the cross section of the cylindrical or stepped is usually circular, oval, square with rounded corners, etc.

[0071] In some embodiments of the utility model, please refer to Figures 8 to 10 , the horizontal cross section of the first inner recess structure 230 is circular, oval or oblong. The specific shape of the cross section of the first inner recess structure 230 is not limited here. Specifically, Figure 8 In the circular embodiment, the horizontal cross section of the first inner recess structure 230 is circular; Figure 9 In the oval embodiment, the horizontal cross section of the first inner recess structure 230 is oval; Figure 10 In the square with rounded corners embodiment, the horizontal cross section of the first inner recess structure 230 is square with rounded corners, including oblong (runway shape).

[0072] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A plug structure, characterized by: The plug comprises a conductive pin, an insulating structure with a corner portion, and a plug base, the insulating structure wraps an end of the conductive pin away from an insertion end, the insulating structure is recessed in the plug base to form a first recessed structure, and the corner portion of the insulating structure is a smooth structure.

2. The plug structure of claim 1, wherein: The insulating structure comprises an insulating wrapping portion and an insulating base portion connected with each other based on the corner portion, the insulating wrapping portion wraps an end of the conductive pin away from an insertion end, the plug base has a first surface for facing a socket, the insulating base portion has a second surface, the second surface is recessed in the first surface to form the first recessed structure, the insulating wrapping portion has a third surface arranged circumferentially, and the second surface and the third surface are smoothly connected through the smooth structure.

3. The plug structure of claim 1, wherein: The recessed depth of the first recessed structure is 0.3mm to 1mm.

4. The plug structure of claim 1, wherein: The smooth structure comprises a first fillet structure.

5. The plug structure of claim 1, wherein: The smooth structure comprises a second fillet structure, an inclined surface structure, and a third fillet structure connected in sequence.

6. The plug structure of claim 5, wherein: The second fillet structure and the third fillet structure have the same radius.

7. The plug structure of claim 1, wherein: The smooth structure comprises a fourth fillet structure, a fifth fillet structure, and a sixth fillet structure, the radius of the fifth fillet structure is different from the radius of the fourth fillet structure and the sixth fillet structure.

8. The plug structure of claim 2, wherein: The first recessed structure comprises a fourth surface of the plug base, and the second surface, the fourth surface, and the first surface are connected in sequence.

9. The plug structure of claim 8, wherein: The fourth surface is perpendicular to the first surface or forms an obtuse angle with the first surface.

10. The plug structure of claim 1, wherein: The horizontal cross section of the first recessed structure is circular, elliptical, or oblong.

Images