Electrical device

Abstract

The utility model relates to the technical field of electrical equipment, in particular to electrical equipment, which comprises a shell, a first protective cover and a second protective cover, and is characterized in that the shell is provided with an anode connecting end, a cathode connecting end, a third positioning part and a fourth positioning part; the first protective cover covers the positive electrode connecting end, the first protective cover is provided with a first positioning part, and the first positioning part is matched and connected with the third positioning part; the second protective cover covers the negative electrode connecting end, the second protective cover is provided with a second positioning part, and the second positioning part is matched and connected with the fourth positioning part; wherein the first protective cover and the second protective cover are respectively provided with a through hole, a power line can penetrate through the through holes, and the first positioning part and the second positioning part are different in size and / or shape. The utility model aims to solve the technical problem that positive and negative electrodes are reversely connected due to improper manual operation when the positive and negative electrode connecting ends of electrical equipment are connected with an external battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical equipment technical field, in particular to a kind of electrical equipment. BACKGROUND

[0002] In the integrated application of power system and electrical equipment, electrical equipment is usually provided with positive and negative connection terminals, when the positive and negative connection terminals of electrical equipment are connected with external power supply, due to improper operation, positive and negative connection terminals are often connected reversely, which not only causes electrical equipment to work abnormally, but also causes serious electrical fault. SUMMARY

[0003] The utility model discloses an electrical equipment, to solve the technical problem that positive and negative connection terminals of electrical equipment are connected reversely due to improper operation when connecting with external battery.

[0004] In order to achieve the above purpose, the utility model provides an electrical equipment, which comprises:

[0005] A shell is provided with a positive connection terminal, a negative connection terminal, a third positioning part and a fourth positioning part;

[0006] A first protective cover is arranged on the positive connection terminal, and the first protective cover is provided with a first positioning part, which is matched and connected with the third positioning part;

[0007] A second protective cover is arranged on the negative connection terminal, and the second protective cover is provided with a second positioning part, which is matched and connected with the fourth positioning part;

[0008] The first protective cover and the second protective cover are both provided with a through hole through which a power line can pass, and the first positioning part and the second positioning part are different in size and / or shape.

[0009] In the electrical equipment of the present application, the first positioning part and the second positioning part are column structures, and the third positioning part and the fourth positioning part are hole structures.

[0010] In the electrical equipment of the present application, the first protective cover is provided with at least one first positioning part, and the second protective cover is provided with at least one second positioning part.

[0011] The shell is provided with at least one third positioning part and at least one fourth positioning part, at least one third positioning part corresponds to at least one first positioning part in position, and at least one fourth positioning part corresponds to at least one second positioning part in position.

[0012] In the electrical device of the present application, the number of the first positioning parts is not equal to the number of the second positioning parts.

[0013] In the electrical device of the present application, the first protective cover and the second protective cover are both square structures, opposite sides of the first protective cover are respectively provided with the first positioning parts, and adjacent sides of the second protective cover are respectively provided with the second positioning parts.

[0014] Opposite sides of the first protective cover are respectively provided with the first positioning parts, and opposite sides of the second protective cover are respectively provided with the second positioning parts.

[0015] In the electrical device of the present application, the shell is provided with a seventh positioning part and an eighth positioning part.

[0016] The first protective cover is further provided with a fifth positioning part, the fifth positioning part is matched with and connected to the seventh positioning part.

[0017] The second protective cover is further provided with a sixth positioning part, the sixth positioning part is matched with and connected to the eighth positioning part.

[0018] Among the first positioning part, the second positioning part, the fifth positioning part and the sixth positioning part, any two of them are different in size and / or shape.

[0019] In the electrical device of the present application, the fifth positioning part and the sixth positioning part are column structures, and the seventh positioning part and the eighth positioning part are hole structures.

[0020] In the electrical device of the present application, the first protective cover and the second protective cover are both square structures, the first positioning part and the fifth positioning part are respectively arranged on opposite sides of the first protective cover, and the second positioning part and the sixth positioning part are respectively arranged on opposite sides of the second protective cover.

[0021] In the electrical device of the present application, the first protective cover and the second protective cover are both square structures, the first positioning part and the fifth positioning part are respectively arranged on opposite sides of the first protective cover, and the second positioning part and the sixth positioning part are respectively arranged on adjacent sides of the second protective cover.

[0022] The first positioning part and the fifth positioning part are respectively arranged on adjacent sides of the first protective cover, and the second positioning part and the sixth positioning part are respectively arranged on opposite sides of the second protective cover.

[0023] In the electrical device of the present application, the first protective cover is provided with a first clamping hook, the shell is provided with a first clamping hole, and the first clamping hook is buckled and connected to the first clamping hole; and / or

[0024] The second protection cover is provided with a second clamping hook, and the shell is provided with a second clamping hole, and the second clamping hook is buckled and connected to the second clamping hole.

[0025] In the electrical equipment, at least one of the color, shape or size of the first protection cover and the second protection cover is different.

[0026] In the electrical equipment, an outer surface of the first protection cover is provided with a first mark, and an outer surface of the second protection cover is provided with a second mark.

[0027] The electrical equipment has the advantages that:

[0028] The electrical equipment comprises a shell, a first protection cover and a second protection cover, a first positioning part is arranged on a connecting end face or a side wall of the first protection cover, and a second positioning part is arranged on a connecting end face or a side wall of the second protection cover. During use, a positive pole connecting line of an external power supply is inserted through a through hole of the first protection cover, and a negative pole connecting line of the external power supply is inserted through a through hole of the second protection cover. Because the first positioning part and the second positioning part are different in size, shape or both, the first positioning part can only be matched and connected with the third positioning part but not the fourth positioning part, so that the first protection cover can only be arranged on the positive pole connecting end but not the negative pole connecting end. Similarly, the second positioning part can only be matched and connected with the fourth positioning part but not the third positioning part, so that the second protection cover can only be arranged on the negative pole connecting end but not the positive pole connecting end. The electrical equipment has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced.

[0030] Figure 1 An explosion schematic view of the electrical equipment provided by the embodiments of the present application is shown in the figure.

[0031] Figure 2 A structure schematic view of the shell provided by the embodiments of the present application is shown in the figure.

[0032] Figure 3 A structure schematic view of the first protection cover provided by the embodiments of the present application is shown in the figure.

[0033] Figure 4 The structure diagram of the second protective cover provided by the embodiment of the utility model.

[0034] The marks in the figure are as follows:

[0035] 10, shell; 101, positive connection end; 102, negative connection end; 103, third positioning part; 104, fourth positioning part; 105, seventh positioning part; 106, eighth positioning part; 107, first clamping hole; 108, second clamping hole; 11, first protective cover; 111, first positioning part; 112, first clamping hook; 12, second protective cover; 121, second positioning part; 122, second clamping hook. DETAILED DESCRIPTION

[0036] The specific embodiments of the utility model will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0037] In the description of the utility model, it should be explained that the positions or location relationships indicated by the terms "upper", "lower", "front", "rear", "inner", "outer" and the like in the utility model are based on the position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices and elements referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model.

[0038] In the description of the utility model, it should be understood that the terms "first", "second" and the like are used to describe various information in the utility model, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, the "first" information can also be referred to as "second" information without departing from the scope of the utility model, and similarly, the "second" information can also be referred to as "first" information.

[0039] As Figures 1 to 4As shown, this utility model embodiment provides an electrical device, including a housing 10, a first protective cover 11, and a second protective cover 12. The housing 10 is provided with a positive terminal 101, a negative terminal 102, a third positioning part 103, and a fourth positioning part 104. The first protective cover 11 covers the positive terminal 101 and is provided with a first positioning part 111, which is adapted to and connected to the third positioning part 103. The second protective cover 12 covers the negative terminal 102 and is provided with a second positioning part 121, which is adapted to and connected to the fourth positioning part 104. Both the first protective cover 11 and the second protective cover 12 are provided with through holes through which power cords can pass. The first positioning part 111 and the second positioning part 121 are different in size and / or shape.

[0040] In this embodiment, the electrical equipment can be communication devices such as inverters, routers, and switches, or household appliances such as televisions and stereos. These devices typically have positive and negative terminals for connecting the power supply. It should be noted that the above are only some common electrical devices and do not cover all device types. In practical applications, any electrical device requiring positive and negative terminals for power connection can utilize the above technical solution for reverse connection protection.

[0041] For ease of explanation, this embodiment uses an inverter as an example. Figure 1 and Figure 2 The housing 10 is the outer shell structure of the inverter. The housing 10 is the main body of the inverter and can be made of insulating material. The housing 10 is provided with a positive connection terminal 101 and a negative connection terminal 102. The positive connection terminal 101 is used to connect to the positive terminal of the power cord, and the negative connection terminal 102 is used to connect to the negative terminal of the power cord. A third positioning part 103 is provided on the side of the positive connection terminal 101, and a fourth positioning part 104 is provided on the side of the negative connection terminal 102.

[0042] The first protective cover 11 is a positive electrode protective cover, and the second protective cover 12 is a negative electrode protective cover. Both the first protective cover 11 and the second protective cover 12 are cover body structures. In this embodiment, the shapes of the first protective cover 11 and the second protective cover 12 are not specifically limited and can be circular, square, or other shapes. The first protective cover 11 covers the positive electrode connecting end 101 and is used to protect the positive electrode connecting end 101. The first protective cover 11 is provided with a first positioning part 111, which is adapted to and connected with the third positioning part 103 on the shell 10. The first protective cover 11 is also provided with a through hole through which the power cord can pass, so that the positive electrode of the power cord can pass through the through hole of the first protective cover 11 and be connected with the positive electrode connecting end 101. Similarly, the second protective cover 12 covers the negative electrode connecting end 102 and is used to protect the negative electrode connecting end 102. The second protective cover 12 is provided with a second positioning part 121, which is adapted to and connected with the fourth positioning part 104 on the shell 10. The second protective cover 12 is provided with a through hole through which the power cord can pass, so that the negative electrode of the power cord can pass through the through hole of the second protective cover 12 and be connected with the negative electrode connecting end 102.

[0043] It should be noted that although the first positioning part 111, the second positioning part 121, the third positioning part 103, and the fourth positioning part 104 are all positioning parts, in order to achieve the adaptation and connection between the first positioning part 111 and the third positioning part 103 and between the second positioning part 121 and the fourth positioning part 104, this embodiment adopts a connection mode in which a column body structure is inserted into a hole body structure.

[0044] Specifically, when the first positioning part 111 and the second positioning part 121 are provided in the column body structure, the third positioning part 103 and the fourth positioning part 104 are provided in the hole body structure, so that the column body structure can be inserted into the hole body structure to achieve connection. Conversely, when the first positioning part 111 and the second positioning part 121 are provided in the hole body structure, the third positioning part 103 and the fourth positioning part 104 are provided in the column body structure.

[0045] In actual application, the first positioning part 111 can be arranged on the connecting end surface (connecting end surface of the shell 10) of the first protective cover 11 or on the side wall of the first protective cover 11, and the second positioning part 121 can be arranged on the connecting end surface (connecting end surface of the shell 10) of the second protective cover 12 or on the side wall of the first protective cover 11. In use, the positive connection line of the external power supply is inserted through the through hole of the first protective cover 11, and the negative connection line of the external power supply is inserted through the through hole of the second protective cover 12. Since the first positioning part 111 and the second positioning part 121 are different in size, shape, or both size and shape, the first positioning part 111 can only be matched and connected with the third positioning part 103 but not with the fourth positioning part 104, so that the first protective cover 11 can only be covered on the positive connection end 101 but not on the negative connection end 102. Similarly, the second positioning part 121 can only be matched and connected with the fourth positioning part 104 but not with the third positioning part 103, so that the second protective cover 12 can only be covered on the negative connection end 102 but not on the positive connection end 101. Through the different design, the first protective cover 11 and the second protective cover 12 cannot be used interchangeably, thereby playing a “foolproof” function, preventing the positive and negative poles of the power supply line from being connected reversely to the positive and negative connection ends of the electrical equipment due to human operation errors, and improving the safety and reliability of electrical connection.

[0046] Exemplarily, the first positioning part 111 in the shape of a cylinder with a diameter of 5 mm is arranged on the connecting end surface or the side wall of the first protective cover 11, and the second positioning part 121 in the shape of a cylinder with a diameter of 4 mm is arranged on the connecting end surface or the side wall of the second protective cover 12. The third positioning part 103 in the shape of a circular hole is arranged on the side of the positive connection end 101, and the fourth positioning part 104 in the shape of a circular hole is arranged on the side of the negative connection end 102. The diameter of the first positioning part 111 is greater than that of the second positioning part 121, so that the first positioning part 111 can only be inserted into the third positioning part 103 but not into the fourth positioning part 104, and the first protective cover 11 can only be installed on the positive connection end 101 but not on the negative connection end 102, thereby preventing the first protective cover 11 from being incorrectly covered on the negative connection end 102 and avoiding the positive pole of the power supply line from being connected to the negative connection end 102.

[0047] Exemplarily, the first protective cover 11 is provided with a prismatic first positioning part 111 on the connecting end face or the side wall, and the second protective cover 12 is provided with a cylindrical second positioning part 121 on the connecting end face or the side wall. The side of the positive electrode connecting end 101 is provided with a prismatic and hole-shaped third positioning part 103, and the side of the negative electrode connecting end 102 is provided with a cylindrical and hole-shaped fourth positioning part 104. Since the shapes of the first positioning part 111 and the second positioning part 121 are different, the first positioning part 111 can only be inserted into the third positioning part 103 and cannot be inserted into the fourth positioning part 104, so that the first protective cover 11 can only cover the positive electrode connecting end 101, and the second protective cover 12 covers the negative electrode connecting end 102.

[0048] Exemplarily, the first protective cover 11 is provided with a prismatic first positioning part 111 on the connecting end face or the side wall, and the second protective cover 12 is provided with a prismatic first positioning part 111 on the connecting end face or the side wall. The side of the positive electrode connecting end 101 is provided with a prismatic and hole-shaped third positioning part 103, and the side of the negative electrode connecting end 102 is provided with a cylindrical and hole-shaped fourth positioning part 104. Since the shapes of the first positioning part 111 and the second positioning part 121 are different, the first positioning part 111 can only be inserted into the third positioning part 103 and cannot be inserted into the fourth positioning part 104, so that the first protective cover 11 can only cover the positive electrode connecting end 101, and the second protective cover 12 covers the negative electrode connecting end 102.

[0049] In some embodiments, the first positioning part 111 and the second positioning part 121 are column structures, and the third positioning part 103 and the fourth positioning part 104 are hole structures.

[0050] Specifically, in order to facilitate the covering of the first protective cover 11 on the positive electrode connecting end 101 and the covering of the second protective cover 12 on the negative electrode connecting end 102, the first positioning part 111 and the second positioning part 121 are provided as column structures, and the third positioning part 103 and the fourth positioning part 104 are correspondingly provided as hole structures, so that when the protective cover is covered on the electrode connecting end, the column structure can be smoothly inserted into the hole structure.

[0051] In the embodiment, the first positioning part 111 and the second positioning part 121 are both in the structure of a column, and the third positioning part 103 and the fourth positioning part 104 are both in the structure of a hole. However, due to the difference in size and / or shape between the first positioning part 111 and the second positioning part 121, the first protective cover 11 and the second protective cover 12 cannot be used interchangeably. The first protective cover 11 can only be used by covering the positive electrode connecting end 101 through the third positioning part 103, and the second protective cover 12 can only be used by covering the negative electrode connecting end 102 through the fourth positioning part 104, so as to prevent the positive and negative electrodes of the power cord from being connected reversely to the positive and negative connecting ends of the electrical equipment. In actual application, the effect of preventing misconnection can be increased by changing the cross-sectional shape of the column (such as circular, square, triangular, hexagonal, etc.).

[0052] In some embodiments, the first protective cover 11 is provided with at least one first positioning part 111, and the second protective cover 12 is provided with at least one second positioning part 121. The shell 10 is provided with at least one third positioning part 103 and at least one fourth positioning part 104. The at least one third positioning part 103 corresponds to the position of the at least one first positioning part 111 one by one, and the at least one fourth positioning part 104 corresponds to the position of the at least one second positioning part 121 one by one.

[0053] In the embodiment, the "one by one correspondence" means that, when assembled or connected, the relative positions between the third positioning part 103 on the shell 10 and the first positioning part 111 on the first protective cover 11, and the relative positions between the fourth positioning part 104 on the shell 10 and the second positioning part 121 on the second protective cover 12, have a unique pairing relationship.

[0054] For example, the first positioning part 111 of the first protective cover 11 is a circular column arranged on the connecting end surface, the second positioning part 121 of the second protective cover 12 is a square column arranged on the connecting end surface, the third positioning part 103 is a circular hole arranged on the side of the positive electrode connecting end 101, and the fourth positioning part 104 is a square hole arranged on the side of the negative electrode connecting end 102.

[0055] Exemplarily, the first protective cover 11 is provided with a first positioning part 111 on each of its left and right sides, and the second protective cover 12 is provided with a second positioning part 121 on each of its upper and lower sides. Correspondingly, the positive electrode connecting end 101 is provided with a third positioning part 103 on each of its left and right sides, and the negative electrode connecting end 102 is provided with a fourth positioning part 104 on each of its upper and lower sides. When the first protective cover 11 covers the positive electrode connecting end 101, the first positioning part 111 on the left side of the first protective cover 11 is adapted to and connected with the third positioning part 103 on the left side of the positive electrode connecting end 101, and the first positioning part 111 on the right side of the first protective cover 11 is adapted to and connected with the third positioning part 103 on the right side of the positive electrode connecting end 101. When the second protective cover 12 covers the negative electrode connecting end 102, the second positioning part 121 on the upper side of the second protective cover 12 is adapted to and connected with the fourth positioning part 104 on the upper side of the negative electrode connecting end 102, and the second positioning part 121 on the lower side of the second protective cover 12 is adapted to and connected with the fourth positioning part 104 on the lower side of the negative electrode connecting end 102.

[0056] Exemplarily, the first protective cover 11 is provided with a first positioning part 111 on each of its left and right sides, and the second protective cover 12 is provided with a second positioning part 121 on each of its upper, lower, left and right sides. Correspondingly, the positive electrode connecting end 101 is provided with a third positioning part 103 on each of its left and right sides, and the negative electrode connecting end 102 is provided with a fourth positioning part 104 on each of its upper, lower, left and right sides. In this way, since the second protective cover 12 has four fourth positioning parts 104 on its sides, it cannot be adapted to and connected with the two third positioning parts 103 of the first protective cover 11, and the second protective cover 12 can only cover the negative electrode connecting end 102 but not the positive electrode connecting end 101.

[0057] In some embodiments, the number of the first positioning parts 111 is not equal to the number of the second positioning parts 121.

[0058] Exemplarily, the first protective cover 11 is provided with two first positioning parts 111 in the form of circular columns on its connecting end face, the second protective cover 12 is provided with three second positioning parts 121 in the form of circular columns on its connecting end face, the positive electrode connecting end 101 is provided with two third positioning parts 103 in the form of circular holes on its sides, and the negative electrode connecting end 102 is provided with three fourth positioning parts 104 in the form of circular holes on its sides.

[0059] In the above example, since the number of the first positioning parts 111 is different from the number of the second positioning parts 121, the first protective cover 11 can only cover the positive electrode connecting end 101, and the second protective cover 12 can only cover the negative electrode connecting end 102.

[0060] In some embodiments, the first protective cover 11 and the second protective cover 12 are both square structures, and the first protective cover 11 is respectively provided with first positioning portions 111 on opposite sides, and the second protective cover 12 is respectively provided with second positioning portions 121 on adjacent sides; or the first protective cover 11 is respectively provided with first positioning portions 111 on adjacent sides, and the second protective cover 12 is respectively provided with second positioning portions 121 on opposite sides.

[0061] In the present embodiment, as shown in Figure 3 and Figure 4 , the first protective cover 11 and the second protective cover 12 are both square structures with four sides.

[0062] Exemplarily, the first protective cover 11 is respectively provided with first positioning portions 111 on left and right sides, and the second protective cover 12 is respectively provided with second positioning portions 121 on a right side and a bottom side.

[0063] Exemplarily, the first protective cover 11 is respectively provided with first positioning portions 111 on a left side and a top side, and the second protective cover 12 is respectively provided with second positioning portions 121 on upper and lower sides.

[0064] In the above examples, the shapes and sizes of the first positioning portions 111 and the second positioning portions 121 can be the same or different. Due to the structural difference between the first protective cover 11 and the second protective cover 12, the first protective cover 11 can only cover the positive electrode connecting end 101, and the second protective cover 12 can only cover the negative electrode connecting end 102.

[0065] In some embodiments, as shown in Figure 2 , the shell 10 is provided with a seventh positioning portion 105 and an eighth positioning portion 106; the first protective cover 11 is further provided with a fifth positioning portion (not shown in the figure), and the fifth positioning portion is adapted to and connected with the seventh positioning portion 105; the second protective cover 12 is further provided with a sixth positioning portion, and the sixth positioning portion is adapted to and connected with the eighth positioning portion 106; wherein the sizes and / or shapes of any two of the first positioning portions 111, the second positioning portions 121, the fifth positioning portion and the sixth positioning portion are different.

[0066] Specifically, the present embodiment is respectively provided with the first positioning portions 111 and the fifth positioning portion on the first protective cover 11, and is respectively provided with the second positioning portions 121 and the sixth positioning portion on the second protective cover 12. Correspondingly, the third positioning portion 103 and the seventh positioning portion 105 are respectively arranged on the side edges of the positive electrode connecting end 101, and the fourth positioning portion 104 and the eighth positioning portion 106 are respectively arranged on the side edges of the negative electrode connecting end 102.

[0067] It can be understood that even if human operation is failed, due to the structure difference (different size, or different shape, or both different size and shape) of any two of the first positioning part 111, the second positioning part 121, the fifth positioning part and the sixth positioning part, the first protective cover 11 cannot be covered on the negative connection end 102, and the second protective cover 12 cannot be covered on the positive connection end 101, thereby preventing the positive and negative poles of the power line from being connected reversely with the positive and negative connection ends of the electrical equipment.

[0068] In some embodiments, as shown in Figures 1 to 4 the fifth positioning part and the sixth positioning part are column structures, and the seventh positioning part 105 and the eighth positioning part 106 are hole structures.

[0069] Specifically, the first positioning part 111, the second positioning part 121, the fifth positioning part and the sixth positioning part are column structures, and the third positioning part 103, the seventh positioning part 105, the fourth positioning part 104 and the eighth positioning part 106 are hole structures. In the first positioning part 111, the second positioning part 121, the fifth positioning part and the sixth positioning part, the structures of the four columns are different (all different in size, or all different in shape, or both different in size and shape). Correspondingly, the structures of the four holes are also different. When the first protective cover 11 is covered towards the positive connection end 101, and the second protective cover 12 is covered towards the negative connection end 102, the first protective cover 11 cannot be covered on the negative connection end 102, and the second protective cover 12 cannot be covered on the positive connection end 101.

[0070] In some embodiments, the first protective cover 11 and the second protective cover 12 are both square structures, and the first positioning part 111 and the fifth positioning part are respectively arranged on opposite sides of the first protective cover 11, and the second positioning part 121 and the sixth positioning part are respectively arranged on opposite sides of the second protective cover 12.

[0071] In the present embodiment, as shown in Figure 3 and Figure 4 the first protective cover 11 and the second protective cover 12 are both square structures with four sides.

[0072] Specifically, the first positioning part 111 and the fifth positioning part are respectively arranged on the left and right sides of the first protective cover 11, and the second positioning part 121 and the sixth positioning part are respectively arranged on the left and right sides of the second protective cover 12, and the structures of the four columns in the first positioning part 111, the second positioning part 121, the fifth positioning part and the sixth positioning part are different (all different in size, or all different in shape, or both different in size and shape).

[0073] Exemplarily, the first positioning part 111 extends along the length of 10 mm of the first protective cover 11 edge, the second positioning part 121 extends along the length of 8 mm of the first protective cover 11 edge, the fifth positioning part extends along the length of 5 mm of the first protective cover 11 edge, and the sixth positioning part extends along the length of 3 mm of the first protective cover 11 edge. Due to the different lengths of the four columns, the reverse insertion of each column into each hole is avoided.

[0074] Exemplarily, the first positioning part 111 extends to the third positioning part 103 with a length (and the hole depth of the third positioning part 103) of 10 mm, the second positioning part 121 extends to the fourth positioning part 104 with a length (and the hole depth of the fourth positioning part 104) of 8 mm, the fifth positioning part extends to the seventh positioning part 105 with a length (and the hole depth of the seventh positioning part 105) of 5 mm, and the sixth positioning part extends to the eighth positioning part 106 with a length (and the hole depth of the eighth positioning part 106) of 3 mm.

[0075] Specifically, for each positioning part in one-to-one correspondence, the length of the column structure extension and the hole depth of the hole structure should match or be equal, and for each positioning part not in one-to-one correspondence, the length of the extension or the hole depth does not match or is not equal, so as to avoid the reverse insertion of each column into each hole.

[0076] In some embodiments, the first protective cover 11 and the second protective cover 12 are both square structures, the first positioning part 111 and the fifth positioning part are respectively arranged on the opposite sides of the first protective cover 11, and the second positioning part 121 and the sixth positioning part are respectively arranged on the adjacent sides of the second protective cover 12; or the first positioning part 111 and the fifth positioning part are respectively arranged on the adjacent sides of the first protective cover 11, and the second positioning part 121 and the sixth positioning part are respectively arranged on the opposite sides of the second protective cover 12.

[0077] Exemplarily, the first positioning part 111 and the fifth positioning part are respectively arranged on the left and right sides of the first protective cover 11, and the second positioning part 121 and the sixth positioning part are respectively arranged on the left side and the bottom side of the second protective cover 12.

[0078] Exemplarily, the first positioning part 111 and the fifth positioning part are respectively arranged on the left and top sides of the first protective cover 11, and the second positioning part 121 and the sixth positioning part are respectively arranged on the upper and lower sides of the second protective cover 12.

[0079] In the above examples, the shapes and sizes of the first positioning part 111 and the second positioning part 121 can be the same or different. Due to the structural difference between the first protective cover 11 and the second protective cover 12, the positioning part arranged on the adjacent sides cannot be inserted into the positioning part arranged on the opposite sides, and the positioning part arranged on the opposite sides cannot be inserted into the positioning part arranged on the adjacent sides.

[0080] In some embodiments, as Figures 1 to 4As shown, the first protective cover 11 is provided with a first clamping hook 112, the shell 10 is provided with a first clamping hole 107, and the first clamping hook 112 is buckled and connected to the first clamping hole 107; and / or the second protective cover 12 is provided with a second clamping hook 122, the shell 10 is provided with a second clamping hole 108, and the second clamping hook 122 is buckled and connected to the second clamping hole 108.

[0081] It should be noted that, as Figure 3 and Figure 4 shown, the first clamping hook 112 and the second clamping hook 122 are clamping components with hook-shaped structures, which can be made of elastic materials and have a certain degree of curvature and restoring force to facilitate clamping and unclamping.

[0082] Specifically, the first clamping hook 112 and the first positioning part 111 are respectively arranged at different side edges of the first protective cover 11, for example, the first positioning part 111 is arranged at the left side edge of the first protective cover 11, and the first clamping hook 112 is arranged at the upper side edge of the first protective cover 11. Similarly, the second clamping hook 122 and the second positioning part 121 are respectively arranged at different side edges of the second protective cover 12, for example, the second positioning part 121 is arranged at the left side edge of the second protective cover 12, and the second clamping hook 122 is arranged at the upper side edge of the second protective cover 12.

[0083] In use, when the first protective cover 11 is arranged on the positive electrode connecting end 101, an external force is applied to make the first clamping hook 112 elastically deform and pass through the first clamping hole 107, so that the first clamping hook 112 is tightly buckled into the side edge of the first clamping hole 107, thereby improving the connection stability of the first protective cover 11 and the positive electrode connecting end 101. When the second protective cover 12 is arranged on the negative electrode connecting end 102, an external force is applied to make the second clamping hook 122 elastically deform and pass through the second clamping hole 108, so that the second clamping hook 122 is tightly buckled into the side edge of the second clamping hole 108, thereby improving the connection stability of the second protective cover 12 and the negative electrode connecting end 102.

[0084] In some embodiments, at least one feature of the color, shape or size of the first protective cover 11 and the second protective cover 12 is different.

[0085] Exemplarily, the colors of the first protective cover 11 and the second protective cover 12 are different. For example, the appearance of the first protective cover 11 is red, and it is arranged on the positive electrode connecting end 101; the appearance of the second protective cover 12 is black, and it is arranged on the negative electrode connecting end 102.

[0086] Exemplarily, the shapes of the first protective cover 11 and the second protective cover 12 are different. For example, the appearance of the first protective cover 11 is circular, and the appearance of the second protective cover 12 is square or rectangular.

[0087] Exemplarily, the first protective cover 11 and the second protective cover 12 are different in volume. For example, the first protective cover 11 is larger or smaller in volume than the second protective cover 12.

[0088] In the above examples, the first protective cover 11 and the second protective cover 12 are designed differently in color, shape and size, and some recognition is added to the appearance to facilitate the distinction.

[0089] In some embodiments, the outer surface of the first protective cover 11 is provided with a first mark, and the outer surface of the second protective cover 12 is provided with a second mark.

[0090] Exemplarily, the outer surface of the first protective cover 11 is provided with a "positive" text mark, and the outer surface of the second protective cover 12 is provided with a "negative" text mark, and the two protective covers can be distinguished according to the text on the mark and correctly installed on the corresponding connecting end.

[0091] Exemplarily, the outer surface of the first protective cover 11 and the second protective cover 12 is respectively provided with a specific symbol. For example, a "+" symbol is printed on the first protective cover 11 to represent the positive electrode, and a "--" symbol is printed on the second protective cover 12 to represent the negative electrode.

[0092] Exemplarily, the outer surface of the first protective cover 11 and the second protective cover 12 adopts a comprehensive mark design, including text, symbol and color and other elements. For example, the first protective cover 11 is provided with a "positive" text mark and a red "+" symbol, and the second protective cover 12 is provided with a "negative" text mark and a black "--" symbol.

[0093] In the above examples, the first protective cover 11 and the second protective cover 12 are designed differently in mark symbol, and some recognition is added to the appearance to facilitate the distinction.

[0094] It should be understood that the term "and / or" used in the description of the utility model and the appended claims means any combination of one or more of the associated listed terms and all possible combinations, and includes these combinations. It should be noted that in this text, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or system. Without more limitation, the element defined by the statement "includes a" does not exclude the presence of another identical element in the process, method, article or system including the element.

[0095] The above-mentioned embodiment serial numbers of the utility model only for description, not represent the pros and cons of the embodiment. The above-mentioned, only for the specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the utility model disclosed in the technical range, can easily think of various equivalent modifications or replacements, these modifications or replacements should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be limited by the protection scope of the claims.

Claims

1. An electrical device, characterized in that, include: The housing is provided with a positive terminal connection, a negative terminal connection, a third positioning part, and a fourth positioning part; A first protective cover is provided on the positive terminal connection. The first protective cover is provided with a first positioning part, which is adapted to and connected to the third positioning part. A second protective cover is provided on the negative terminal connection. The second protective cover is provided with a second positioning part, which is adapted to and connected to the fourth positioning part. Both the first protective cover and the second protective cover are provided with through holes for the power cord to pass through, and the first positioning part and the second positioning part are different in size and / or shape.

2. The electrical equipment according to claim 1, characterized in that, The first positioning part and the second positioning part are cylindrical structures, while the third positioning part and the fourth positioning part are hole structures.

3. The electrical equipment according to claim 2, characterized in that, The first protective cover is provided with at least one first positioning part, and the second protective cover is provided with at least one second positioning part; The housing is provided with at least one third positioning part and at least one fourth positioning part, wherein the position of at least one third positioning part corresponds one-to-one with the position of at least one first positioning part, and the position of at least one fourth positioning part corresponds one-to-one with the position of at least one second positioning part.

4. The electrical equipment according to claim 3, characterized in that, The number of the first positioning parts is not equal to the number of the second positioning parts.

5. The electrical equipment according to claim 2, characterized in that, Both the first protective cover and the second protective cover are square structures. The first protective cover has a first positioning part on each of its opposite sides, and the second protective cover has a second positioning part on each of its adjacent sides; or The first protective cover has a first positioning part on each of its adjacent sides, and the second protective cover has a second positioning part on each of its opposite sides.

6. The electrical equipment according to claim 1, characterized in that, The housing is provided with a seventh positioning part and an eighth positioning part; The first protective cover is also provided with a fifth positioning part, which is adapted to and connected to the seventh positioning part; The second protective cover is also provided with a sixth positioning part, which is adapted to and connected to the eighth positioning part; Among them, any two of the first positioning part, the second positioning part, the fifth positioning part, and the sixth positioning part have different sizes and / or shapes.

7. The electrical equipment according to claim 6, characterized in that, The fifth and sixth positioning parts are cylindrical structures, while the seventh and eighth positioning parts are hole structures.

8. The electrical equipment according to claim 7, characterized in that, Both the first protective cover and the second protective cover are square structures. The first positioning part and the fifth positioning part are respectively located on opposite sides of the first protective cover, and the second positioning part and the sixth positioning part are respectively located on opposite sides of the second protective cover.

9. The electrical equipment according to claim 7, characterized in that, Both the first and second protective covers are square structures. The first positioning part and the fifth positioning part are respectively located on opposite sides of the first protective cover, and the second positioning part and the sixth positioning part are respectively located on adjacent sides of the second protective cover; or The first positioning part and the fifth positioning part are respectively disposed on adjacent sides of the first protective cover, and the second positioning part and the sixth positioning part are respectively disposed on opposite sides of the second protective cover.

10. The electrical equipment according to any one of claims 1 to 9, characterized in that, The first protective cover is provided with a first hook, and the housing is provided with a first locking hole; the first hook is fastened to the first locking hole; and / or The second protective cover is provided with a second hook, and the housing is provided with a second locking hole, with the second hook being snapped into the second locking hole.

11. The electrical equipment according to any one of claims 1 to 9, characterized in that, The first protective cover differs from the second protective cover in at least one of the following characteristics: color, shape, or size.

12. The electrical equipment according to any one of claims 1 to 9, characterized in that, The outer surface of the first protective cover is provided with a first mark, and the outer surface of the second protective cover is provided with a second mark.

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