Five-jack socket protection door assembly and socket thereof
The five-hole socket protection door assembly addresses the issue of sliding deviation by using a movable cavity and limiting mechanisms to stabilize the protection doors, ensuring even force distribution and preventing spring popping out, thus enhancing socket safety.
Patent Information
- Application Number
- CN202420813826.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-18
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-18
AI Technical Summary
Existing socket protection doors lack sufficient constraints to prevent sliding deviation, leading to uneven force distribution and increased likelihood of spring popping out.
A five-hole socket protection door assembly with a movable cavity, guide rail grooves, and slider portions that allow the secondary and tertiary protection doors to slide in opposite directions, coupled with limiting mechanisms to restrict movement and balance forces, preventing spring displacement.
The solution effectively limits the sliding deviation of protection doors, ensuring even force distribution and preventing the spring from popping out, thereby enhancing the stability and safety of the socket mechanism.
Smart Images
Figure CN222214581U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sockets, in particular to a five-hole socket protection door component and a socket strip thereof. Background Art
[0002] Sockets are one of the indispensable electrical devices in people's daily lives. The safety of the use of electricity in sockets is also a problem that people pay more attention to during use. In order to improve the safety performance of the socket, a socket protection door is often set at the socket of the socket. The existing socket protection door is used to prevent objects from mistakenly entering the socket through the jack and plugging into the metal spring clip in the socket to energize. For example, the existing five-hole socket usually includes a shell, a metal spring clip, a five-hole base shell, a two-pole protection door and a three-level protection door. The five-hole base shell and the metal spring clip are both arranged in the shell. The metal spring clip is located at the bottom of the five-hole base shell. The second-level protection door and the third-level protection door are movably arranged in the five-hole base shell. A spring is arranged between the two protection doors, and each protection door is provided with an inclined surface. When the pin on the plug is inserted into the socket, the pin pushes the protection door along the inclined surface on the protection door to move in the front and rear direction, and the spring is squeezed and compressed, and the jack on the five-hole base shell is exposed so that the pin is inserted into the metal spring clip in the jack.
[0003] However, since the protective door has no limit when sliding, it is easy for the protective door to shift, which will cause uneven force on both sides of the spring between the two protective doors, and the spring will easily pop out. Utility Model Content
[0004] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a five-hole socket protection door assembly and a socket strip thereof, which has the advantages of limiting the sliding of the protection door and reducing the spring pop-up caused by the deviation of the protection door during the sliding process.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a five-hole socket protection door assembly, comprising: a five-hole base shell, a secondary protection door, a tertiary protection door and a spring; an active cavity is arranged on the five-hole base shell, and the secondary protection door and the tertiary protection door are both arranged in the active cavity and can slide in opposite directions; the spring is arranged between the secondary protection door and the tertiary protection door, and a guide rail groove is arranged on the bottom surface of the active cavity, and the guide rail groove is arranged along the width direction, and the bottom surfaces of the secondary protection door and the tertiary protection door are provided with a sliding block part, and the sliding block part can slide in the guide rail groove.
[0006] Furthermore, a tertiary jack and a secondary jack are arranged on the bottom surface of the active cavity, a grounding jack of the tertiary jack is located between the secondary jacks, and two guide rail grooves are symmetrically arranged, and the two guide rail grooves are respectively located on both sides of the secondary jack and the tertiary jack.
[0007] Furthermore, the secondary protection door is located above the secondary socket, and a plug hole corresponding to the grounding socket of the tertiary socket is opened in the middle of the secondary protection door. The secondary protection door is provided with first inclined surfaces inclined forward and downward on the left and right sides of the plug hole; the tertiary protection door is provided with second inclined surfaces inclined backward and downward on the left and right sides.
[0008] Furthermore, a limiting groove is provided in the middle position of the front surface of the third-level protection door, a first positioning column is arranged in the limiting groove, a second positioning column opposite to the first positioning column is arranged on the rear surface of the second-level protection door, and one end of the spring is sleeved on the first positioning column and the other end is sleeved on the second positioning column.
[0009] Furthermore, connecting arms are extended forward on both sides of the front surface of the third-level protection door, and sliding platforms are provided on both sides of the second-level protection door, and the two connecting arms are respectively provided on the upper surfaces of the two sliding platforms.
[0010] Furthermore, a limiting hook is arranged at the front end of the two connecting arms, a limiting plate is arranged at the rear end of the slide portion, and a limiting hole is arranged on the limiting plate for the connecting arms to pass through.
[0011] Furthermore, a third positioning column protrudes from the front surface of the secondary protection door, a fourth positioning column protrudes from the rear surface of the tertiary protection door, and through holes for the third and fourth positioning columns to pass through are provided on the front and rear sides of the five-hole base shell.
[0012] Furthermore, limiting members are provided on both the front and rear sides of the movable cavity, and the limiting members are located between the two guide rail grooves.
[0013] A socket, comprising at least one of the above-mentioned five-hole socket protection door components, a shell, a face cover, a live wire conductive sheet, a neutral wire conductive sheet and a ground wire conductive sheet; the five-hole socket protection door component is arranged in the shell, and five sockets are arranged at the bottom of the five-hole base shell of the five-hole socket protection door component; the live wire conductive sheet, the neutral wire conductive sheet and the ground wire conductive sheet are all arranged in the shell, and the live wire conductive sheet, the neutral wire conductive sheet and the ground wire conductive sheet are all provided with metal spring clips plugged with the sockets; the face cover is arranged on the shell, and the face cover is provided with a plurality of groups of five-position holes corresponding to the secondary sockets and the tertiary sockets of the five-hole socket protection door component.
[0014] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: a five-hole socket protection door assembly, comprising: a five-hole base shell, a secondary protection door, a tertiary protection door and a spring, a movable cavity is arranged on the five-hole base shell, the secondary protection door and the tertiary protection door are both arranged in the movable cavity and can slide in opposite directions, the spring is arranged between the secondary protection door and the tertiary protection door, a guide rail groove is arranged on the bottom surface of the movable cavity, the guide rail groove is arranged along the width direction, and a slider portion slidably assembled with the guide rail groove is arranged on the bottom surface of the secondary protection door and the tertiary protection door, by arranging the guide rail groove in the movable cavity and arranging the slider portion slidably matched with the guide rail groove at the bottom of the protection door, the movement of the protection door is restricted, and the displacement of the protection door during the sliding process and the spring popping out caused by the reduction in the spring popping out.
[0015] Two guide rail grooves are symmetrically arranged, and two sliding blocks are symmetrically arranged on both sides of the bottom of each protective door, so that the force on the left and right sides of the spring is more even, thereby balancing the stability of the sliding of the protective door in the active cavity and further preventing the spring from popping out.
[0016] Connecting arms extend from front to back on both sides of the rear surface of the secondary protection door, and slides are provided on both sides of the tertiary protection door. Two connecting arms are respectively provided on the upper surfaces of the two slides and can slide relative to the slides. Limiting hooks are provided at the rear ends of the two connecting arms, and limiting plates are provided at the front ends of the slides. Limiting holes for the connecting arms to pass through are provided on the limiting plates. The tertiary protection door is connected to the limiting plates through the limiting hooks on the connecting arms, further limiting the sliding distance of the two protection doors. Since the limiting plates are connected to the limiting hooks, the springs can be further prevented from popping out. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 is a schematic structural diagram of a five-hole socket protection door assembly in Example 1;
[0019] Figure 2 is a schematic diagram of the separation state of the five-hole base shell and the protective door in Example 1;
[0020] Figure 3 is an exploded schematic diagram of Example 1;
[0021] Figure 4 is an exploded schematic diagram of another direction of the embodiment;
[0022] Figure 5 is a schematic structural diagram of a socket in Embodiment 2;
[0023] Figure 6 This is a schematic diagram of the state in which the cover is opened in Embodiment 2;
[0024] Figure 7 It is a schematic diagram of the explosion of Example 2.
[0025] Explanation of the reference numerals: 1, shell; 11, support part; 2, cover; 20, five-position hole; 3, live wire conductive sheet; 4, neutral wire conductive sheet; 5, ground wire conductive sheet; 6, metal spring clip; five-hole base shell; 101, movable cavity; 102, guide groove; 103, third-level socket; 104, second-level socket; 111, limiter; 105, through hole; 112, socket; 200, spring; second-level protection door; 311, slider; 301, plug-in hole; 312, first inclined surface; 313, second positioning column; 314, slide; 315, limit plate; 303, limit hole; 316, third positioning column; 400, third-level protection door; 411, second inclined surface; 412, first positioning column; 413, connecting arm; 414, limit hook; 415, fourth positioning column; 401, limit groove. DETAILED DESCRIPTION
[0026] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0027] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.
[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed 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.
[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of some utility models, "plurality" means two or more, unless otherwise clearly and specifically defined.
[0031] Embodiment 1:
[0032] This embodiment relates to a five-hole socket protection door assembly, such as Figure 1-4 As shown, it includes: a five-hole base shell 100, a secondary protection door 300, a tertiary protection door 400 and a spring 200.
[0033] The five-hole base shell 100 is provided with an active cavity 101, and the secondary protection door 300 and the tertiary protection door 400 are both provided in the active cavity 101 and can slide in opposite directions. The spring 200 is provided between the secondary protection door 300 and the tertiary protection door 400, and the two ends of the spring 200 are respectively connected to the secondary protection door 300 and the tertiary protection door 400. The bottom surface of the active cavity 101 is provided with a guide groove 102, and the guide groove 102 is provided along the width direction. The bottom surfaces of the secondary protection door 300 and the tertiary protection door 400 are provided with a slider portion 311 slidably assembled with the guide groove 102. Optionally, the outer wall surface of the slider portion 311 and the inner wall surface of the guide groove 102 are arc surfaces that match each other.
[0034] Preferably, in order to make the movement of the protection door in the movable cavity 101 more stable, a three-level jack 103 and a two-level jack 104 are arranged on the bottom surface of the movable cavity 101, and the grounding jack of the three-level jack 103 is located between the two-level jacks 104. Two guide rail grooves 102 are symmetrically arranged, and the two guide rail grooves 102 are respectively located on both sides of the two-level jack 104 and the three-level jack 103. Slider parts 311 are symmetrically arranged on the left and right sides of the bottom surface of the secondary protection door 300, and slider parts 311 are symmetrically arranged on the left and right sides of the bottom surface of the three-level protection door 400. The spring 200 is located between the two guide rail grooves 102. It is worth noting that the secondary protection door 300 and the three-level protection door 400 can slide in opposite directions. Since the same five-hole socket can only insert a three-pin plug or a two-pin plug at the same time, the secondary protection door 300 and the three-level protection door 400 cannot slide at the same time. Only one can remain still and the other can slide towards it. For example, when a two-pin plug is inserted, the third-level protection door 400 remains stationary, and the second-level protection door 300 slides toward the third-level protection door 400 .
[0035] Specifically, the secondary protection door 300 is located above the secondary socket 104, and a plug hole 301 corresponding to the grounding socket of the tertiary socket 103 is provided in the middle of the secondary protection door 300. The left and right sides of the plug hole 301 on the secondary protection door 300 are respectively provided with first inclined surfaces 312 inclined forward and downward. The left and right sides of the tertiary protection door 400 are respectively provided with second inclined surfaces 411 inclined backward and downward. The tertiary socket 103 is composed of a live socket, a neutral socket and a grounding socket, and the secondary socket 104 is composed of a live socket and a neutral socket. The grounding socket of the tertiary socket 103 is located between the secondary sockets 104 and is flush with the secondary sockets 104, that is, the grounding socket of the tertiary socket 103 is located between the live socket and the neutral socket of the secondary socket 104. In other words, the grounding socket of the tertiary socket 103 is located between the live socket and the neutral socket of the secondary socket 104.
[0036] It should be noted that when a two-pin plug is plugged into a socket, the two pins on the plug act on the first inclined surface, and under the action of the pins and the first inclined surface, the secondary protection door 300 is pushed to slide backward along the guide groove 102 to compress the spring 200 so that the secondary socket 104 is exposed, so that the pin is plugged into the secondary socket 104 and plugged into the metal spring clip 6. When a three-pin plug is plugged into a socket, the three pins on the plug act on the second inclined surface, and under the action of the pins and the second inclined surface, the third protection door 300 is pushed to slide backward along the guide groove 102 to compress the spring 200 so that the secondary socket 104 is exposed, so that the pin is plugged into the secondary socket 104 and plugged into the metal spring clip 6. The protective door 400 slides forward along the guide groove 102 to compress the spring 200 so that the live wire socket and the neutral wire socket of the three-level socket 103 are exposed, so that the pin is inserted into the three-level socket 103 and plugged into the metal spring clip 6. By arranging a slider portion 311 on the bottom of the protective door, the slider portion 311 moves in the guide groove 102 to ensure that the secondary protective door 300 and the tertiary protective door 400 will not deviate during the sliding process, thereby reducing the spring 200 from popping out due to the oblique force during the compression process.
[0037] Optionally, in order to further limit the spring 200 and reduce the popping out of the spring 200, a limiting groove 401 is opened in the middle position of the front surface of the third-level protection door 400, and a first positioning column 412 is arranged in the limiting groove 401. A second positioning column 313 is arranged on the rear surface of the secondary protection door 300. The second positioning column 313 is arranged opposite to the first positioning column 412, and the two ends of the spring 200 are respectively mounted on the first positioning column 412 and the second positioning column 313.
[0038] Optionally, in order to further limit the sliding of the protection door and reduce the displacement of one protection door relative to another protection door during the sliding process, which may cause the spring 200 to pop out, connecting arms 413 extend forward on both sides of the front surface of the third-level protection door 400, and sliding platforms 314 are arranged on both sides of the third-level protection door 400. The two connecting arms 413 are respectively arranged on the upper surfaces of the two sliding platforms 314. Driven by the third-level protection door 400, the connecting arms 413 can slide relative to the sliding platform 314.
[0039] Furthermore, the front ends of the two connecting arms 413 are provided with limit hooks 414, and the rear ends of the slide 314 are provided with limit plates 315, and the limit plates 315 are provided with limit holes 303 for the connecting arms 413 to penetrate. The third-level protection door 400 is engaged with the limit plates 315 through the limit hooks 414 on the connecting arms 413, further limiting the sliding distance of the two protection doors. Since the limit plates 315 are engaged with the limit hooks 414, the second-level protection door 300 and the third-level protection door 400 form a whole, preventing the two protection doors from offsetting each other and causing the spring 200 to pop out.
[0040] Optionally, in order to further prevent the two protection doors from popping out of the five-hole base under the elastic force of the spring 200, a third positioning column 316 protrudes from the front surface of the secondary protection door 300, and a fourth positioning column 415 protrudes from the rear surface of the tertiary protection door 400, and through holes 105 for the third positioning column 316 and the fourth positioning column 415 to pass through are provided on the front and rear sides of the five-hole base shell 100.
[0041] It should be noted that since the tertiary protection door 400 is clamped with the limiting plate 315 on the secondary protection door 300 through the limiting hook 414 on the connecting arm 413, the third positioning column 316 can be plugged into the through hole 105 of the five-hole base shell 100, and the fourth positioning column 415 can be plugged into the through hole 105 on the rear side of the five-hole base shell 100, thereby limiting the two protection doors and reducing the displacement or popping out of the protection doors under the action of the restoring force of the spring 200.
[0042] Optionally, both the front and rear sides of the movable cavity 101 are provided with limiting members 111, the limiting members 111 are located between the two guide rail grooves 102, and the limiting members 111 are used to limit the width direction (front and back) sliding distance of the secondary protection door 300 and / or the tertiary protection door 400. The limiting members 111 near the rear side of the five-hole base shell 100 in the movable groove are in the shape of an eight or isosceles trapezoidal plate, and the limiting members 111 near the front side of the five-hole base shell 100 in the movable groove are rectangular, and the through holes 105 are respectively penetrated with the limiting members 111.
[0043] Embodiment 2:
[0044] This embodiment is an improvement based on the embodiment 1, a socket, such as Figure 5-7As shown, it includes at least one of the above-mentioned five-hole socket protection door components, a shell 1, a cover 2, a live wire conductive sheet 3, a neutral wire conductive sheet 4 and a ground wire conductive sheet 5. The five-hole socket protection door component is arranged in the shell 1, and five sockets 112 are arranged at the bottom of the five-hole base shell 100 of the five-hole socket protection door component. The live wire conductive sheet 3, the neutral wire conductive sheet 4 and the ground wire conductive sheet 5 are all arranged in the shell 1, and the live wire conductive sheet 3, the neutral wire conductive sheet 4 and the ground wire conductive sheet 5 are all provided with metal spring clips 6 plugged with the sockets 112. The cover 2 is covered on the shell 1, and the cover 2 is provided with a plurality of groups of five-position holes 20 corresponding to the secondary sockets 104 and the tertiary sockets 103 of the five-hole socket protection door component.
[0045] It should be noted that the five sockets 112 are respectively a first live socket 112 connected to the live socket of the secondary socket 104, a first neutral socket 112 connected to the neutral socket of the secondary socket 104, a ground socket 112 connected to the ground socket of the tertiary socket 103, a second live socket 112 connected to the live socket of the tertiary socket 103, and a second neutral socket 112 connected to the neutral socket of the tertiary socket 103. The live conductive sheet 3 is provided with live metal spring clips 6 plugged into the first live socket 112 and the second live socket 112, and the neutral conductive sheet 4 is provided with neutral metal spring clips 6 plugged into the first neutral socket 112 and the second neutral socket 112. The ground conductive sheet 5 is provided with a ground metal spring clip 6 plugged into the ground socket 112. The live wire conductive sheet 3, the neutral wire conductive sheet 4 and the ground wire conductive sheet 5 can all be long copper sheets, and can be fixed to the cover 2 or the housing 1 by screws, adhesives, etc. The five-hole base shell 100 can be fixed to the cover 2 or the housing 1 by screws.
[0046] Optionally, a support portion 11 is provided in the housing 1 and below the metal spring clip 6 , and the support portion 11 is used to support the metal spring clip 6 to prevent the metal spring clip 6 from bending and deforming downward due to a downward force when a plug pin of the plug is inserted into the metal spring clip 6 .
[0047] Optional. At least two five-hole socket protection door assemblies are arranged in a row in the shell 1. A circuit board is also arranged in the shell 1. The circuit board is electrically connected to the external power supply through a power line. The circuit board is electrically connected to the live wire conductive sheet 3, the neutral wire conductive sheet 4 and the ground wire conductive sheet 5 respectively. Optionally, a power switch electrically connected to the circuit board for controlling the on and off of the socket is also arranged in the shell 1. An indicator light and a USB interface electrically connected to the circuit board are also arranged on the shell 1. The power switch, the indicator light and the USB interface are all covered with a cover 2.
[0048] The above is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.
Claims
1. A five-hole socket protection door assembly, comprising: A five-hole base shell (100), a secondary protection door (300), a tertiary protection door (400) and a spring (200); The five-hole base shell (100) is provided with an active cavity (101), and the secondary protection door (300) and the tertiary protection door (400) are both arranged in the active cavity (101) and can slide in opposite directions; the spring (200) is arranged between the secondary protection door (300) and the tertiary protection door (400), and is characterized in that a guide rail groove (102) is provided on the bottom surface of the active cavity (101), and the guide rail groove (102) is arranged along the width direction; the bottom surfaces of the secondary protection door (300) and the tertiary protection door (400) are provided with a sliding block portion (311), and the sliding block portion (311) can slide in the guide rail groove (102).
2. The five-hole socket protection door assembly according to claim 1, characterized in that: The bottom surface of the active cavity (101) is provided with a tertiary jack (103) and a secondary jack (104); the grounding jack of the tertiary jack (103) is located between the secondary jacks (104); two guide rail grooves (102) are symmetrically provided, and the two guide rail grooves (102) are respectively located on both sides of the secondary jack (104) and the tertiary jack (103).
3. The five-hole socket protection door assembly according to claim 2, characterized in that: The secondary protection door (300) is located above the secondary socket (104); a plug-in hole (301) corresponding to the grounding socket of the tertiary socket (103) is provided in the middle of the secondary protection door (300); first inclined surfaces (312) inclined forward and downward are respectively provided on the left and right sides of the plug-in hole (301); the first inclined surfaces (312) are arranged on the secondary protection door (300); and second inclined surfaces (411) inclined backward and downward are respectively provided on the left and right sides of the tertiary protection door (400).
4. The five-hole socket protection door assembly according to claim 1, characterized in that: A limiting groove (401) is provided in the middle of the front surface of the third-level protection door (400), a first positioning column (412) is arranged in the limiting groove (401), a second positioning column (313) is arranged on the rear surface of the second-level protection door (300), and the first positioning column (412) and the second positioning column (313) are arranged opposite to each other; one end of the spring (200) is sleeved on the first positioning column (412), and the other end is sleeved on the second positioning column (313).
5. The five-hole socket protection door assembly according to claim 1, characterized in that: Connecting arms (413) are extended forward on both sides of the front surface of the third-level protection door (400), and sliding platforms (314) are arranged on both sides of the second-level protection door (300), and the two connecting arms (413) are respectively arranged on the upper surfaces of the two sliding platforms (314).
6. The five-hole socket protection door assembly according to claim 5, characterized in that: The front ends of the two connecting arms (413) are provided with limiting hooks (414), the rear end of the slide portion (314) is provided with a limiting plate (315), and the limiting plate (315) is provided with limiting holes (303) for the connecting arms (413) to pass through.
7. The five-hole socket protection door assembly according to claim 1, characterized in that: A third positioning column (316) protrudes from the front surface of the secondary protection door (300), a fourth positioning column (415) protrudes from the rear surface of the tertiary protection door (400), and through holes (105) for the third positioning column (316) and the fourth positioning column (415) to pass through are provided on the front and rear sides of the five-hole base shell (100).
8. The five-hole socket protection door assembly according to claim 2, characterized in that: Limiting members (111) are provided on both the front and rear sides of the movable cavity (101), and the limiting members (111) are located between the two guide rail grooves (102).
9. A socket, characterized in that: It comprises at least one five-hole socket protection door assembly as claimed in any one of claims 1 to 8, a housing (1), a cover (2), a live wire conductive sheet (3), a neutral wire conductive sheet (4) and a ground wire conductive sheet (5); The five-hole socket protection door assembly is arranged in the housing (1), and five sockets (112) are arranged at the bottom of the five-hole base shell (100) of the five-hole socket protection door assembly; The live wire conductive sheet (3), the neutral wire conductive sheet (4) and the ground wire conductive sheet (5) are all arranged in the housing (1), and the live wire conductive sheet (3), the neutral wire conductive sheet (4) and the ground wire conductive sheet (5) are all provided with a metal spring clip (6) plugged into the socket (112); The surface cover (2) is arranged on the shell (1), and is provided with a plurality of groups of five-position holes (20) corresponding one-to-one to the secondary sockets (104) and the tertiary sockets (103) of the five-hole socket protection door assembly.