Protective door structure of direct current socket

Abstract

The invention provides a protection door structure of a direct current socket, which comprises a first protection door, a second protection door, a third protection door and an elastic component, the elastic component is connected with the first protection door or the second protection door to drive the first protection door and the second protection door to move in the first direction to shield the first plug hole and the second plug hole respectively, the third protection door moves in the second direction, and a limiting structure is arranged between the first protection door or the second protection door and the third protection door. The limiting structure is used for limiting the third protection door to move in the second direction, when the first plug contact area of the first protection door is stressed to drive the first protection door and the second protection door to move in the first direction, the first protection door and the second protection door avoid the first plug hole and the second plug hole, and meanwhile the limiting structure relieves limiting of the third protection door. The device has the advantages of being small in size, attractive in structure and high in safety.

Description

Technical Field

[0001] This invention relates to the field of electrical appliances, and more specifically to a protective door structure for a DC socket. Background Technology

[0002] A socket, also known as a power outlet or switch socket, is a commonly used device in electrical connections. Traditional sockets have their inserts exposed inside the holes, making it easy for small, conductive objects to fall into the holes and come into contact with the inserts, potentially causing electric shock. This is especially dangerous for children, whose fingers can easily stick into the holes and touch the inserts, posing a significant safety hazard. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a protective door structure for a DC socket that is highly secure, uses few parts, and is easy to assemble.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This application provides a protective door structure for a DC socket, including a first protective door, a second protective door, and a third protective door for respectively blocking a first plug hole, a second plug hole, and a third plug hole of the socket. The second and third plug holes are rectangular structures, with the longer side of the second plug hole in a second direction and the longer side of the third plug hole in a first direction.

[0006] The first protective door includes a first plug contact area with a beveled structure, and the first plug contact area of ​​the first protective door blocks the first plug hole.

[0007] The first protective door and the second protective door are integrally formed and configured to move along a first direction. An elastic component is connected to the first protective door or the second protective door, driving the first protective door and the second protective door to move along the first direction and respectively block the first plug hole and the second plug hole.

[0008] The third protective door is configured to move along a second direction, which is perpendicular to the first direction. A limiting structure is provided between the first or second protective door and the third protective door. The limiting structure is used to limit the movement of the third protective door along the second direction from the third plug hole to the second plug hole, so that the third protective door is positioned to block the third plug hole.

[0009] When the first plug contact area of ​​the first protective door is driven by force to move the first protective door and the second protective door along the first direction, the first protective door and the second protective door avoid the first plug hole and the second plug hole. At the same time, the limiting structure releases its limitation on the third protective door. The third protective door moves from the position that blocks the third plug hole to the position that is close to the second plug hole along the second direction and avoids the third plug hole.

[0010] In one possible implementation, the limiting structure includes a first limiting portion disposed on the second protective door and a second limiting portion disposed on the third protective door. The first limiting portion and the second limiting portion are mutually cooperating inclined surfaces. The obtuse or acute angle formed by the first limiting portion and the second direction is complementary to the acute or obtuse angle formed by the second limiting portion and the second direction.

[0011] In one possible implementation, the first limiting part is placed below the second limiting part, and the third protective door further includes a third plug contact area, which is an inclined surface. The height of the inclined surface is a low point on the side away from the limiting structure and a high point on the side closer to the limiting structure, and is inclined along the second direction.

[0012] In one possible implementation, while the elastic component drives the first and second protective doors to move upward or downward along a first direction to block the first and second plug holes, the second protective door drives the third protective door to move along a second direction away from the second plug hole through a limiting structure to block the third plug hole.

[0013] In one possible implementation, a housing is included, and a first protective door, a second protective door, a third protective door, and a resilient component are installed inside the housing to form a protective door module.

[0014] The housing is provided with a module socket for a three-prong plug to pass through, and the protective door module is detachably installed in the socket body.

[0015] In one possible implementation, the first and second protective doors move downwards a distance less than the length of the third plug hole in the first direction.

[0016] In one possible implementation, the first plug hole is circular, with a diameter greater than the width of the second plug hole but less than its length. The first protective door is used to shield between the grounding sleeve and the first plug hole, partially shielding the first plug hole.

[0017] In one possible implementation, the first and second protective doors move downwards along a first direction by a distance equal to the width of the second plug hole.

[0018] In one possible implementation, the first protective door and the second protective door move downward along a first direction by a distance greater than or equal to the width of the second plug hole, and less than 110% of the width of the second plug hole.

[0019] In one possible implementation, the first protective door and the second protective door are cuboid structures, with their length directions in a second direction. An integrally formed protective door connecting part is provided between the first protective door and the second protective door. The protective door connecting part is a rod-shaped structure with its two ends connected to the first protective door and the second protective door respectively, and perpendicular to the first protective door and the second protective door along a first direction.

[0020] In one possible implementation, the width of the cuboid structure of the first protective door is less than or equal to the width of the cuboid structure of the second protective door, the cuboid structure of the first protective door covers half of the first plug hole, and a boss structure is provided on the side of the cuboid structure of the first protective door along a first direction, the boss structure at least covers the center of the first plug hole, and the length and width of the boss structure are less than the radius of the first plug hole.

[0021] In one possible implementation, the connection between the second protective door and the protective door connection portion extends towards the third protective door and is further provided with a first limiting portion. The third protective door includes a third plug contact area for blocking the third plug hole. The third plug contact area is provided with a second limiting portion on the side near the second protective door. The sides of the first limiting portion and the second limiting portion that abut against each other are complementary slopes.

[0022] In one possible implementation, the first protective door, the second protective door, and the third protective door are slidably mounted on the base. The first protective door has a first protrusion along a first direction, and the base has a second protrusion along the first direction. The first protrusion and the second protrusion are on the same straight line, and the two ends of the elastic member are respectively mounted on the first protrusion and the second protrusion.

[0023] In one possible implementation, the first protective door is provided with a first groove along a first direction, and the base is provided with a first protrusion that mates with the first groove; and / or, the third protective door is provided with a third protrusion along a second direction, and the base is provided with a second groove that mates with the third protrusion.

[0024] Compared to existing technologies, the protective door structure of the DC socket in this application simplifies the protection structure by integrating the first and second protective doors into a single unit, thus improving production and installation efficiency. Furthermore, a limiting structure is provided between the second and third protective doors, allowing the second door to restrict the third door's movement. The third door's restriction is only released after the ground plug is connected. Without a ground plug, neither the second nor the third protective door can be opened. This design significantly enhances the socket's safety, ensures electrical safety, prevents electric shock accidents, and solves the problem of poor safety in traditional sockets. Furthermore, considering that the second and third plug holes of the DC socket have rectangular structures, with the longer side of the second plug hole in the second direction and the longer side of the third plug hole in the first direction, the first and second protective doors are designed as a single unit, while the third protective door is designed and installed separately. This allows the first and second protective doors to move along the first direction, and the third protective door to move along the second direction. The distance the first and second protective doors move along the first direction is less than the length of the third plug hole. This design can significantly reduce the overall size of the socket, save production costs, improve production and installation efficiency, and make the socket compact and aesthetically pleasing. Ideally, the distance the first and second protective doors move downwards along the first direction can be equal to the width of the second plug hole, minimizing the space occupied by the protective door structure. Furthermore, while the elastic component drives the first and second protective doors to move upward along the first direction to block the first and second plug holes, the second protective door drives the third protective door to move to the right along the second direction to block the third plug hole through the limiting structure. There is no need to set a separate elastic component for the third protective door. Only one elastic component is needed to drive the first, second, and third protective doors simultaneously, which simplifies the structure and reduces costs.

[0025] Furthermore, by adopting a modular structure for the protective door, the first protective door, the second protective door, the third protective door, and the elastic component are installed inside the housing to form a protective door module, which can then be detachably installed on the socket body to shield and protect the socket sleeve. This modular structure has the advantages of convenient installation and aesthetically pleasing structure, and can improve the efficiency of socket production and installation. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of the protective door structure of this application;

[0027] Figure 2 This is a schematic diagram of the structure of the cover in the protective door structure of this application;

[0028] Figure 3a This is a front view of the protective door structure of this application before the plug is inserted;

[0029] Figure 3b This is a side view of the protective door structure of this application before the plug is inserted;

[0030] Figure 4a This is a front view of the protective door structure after the ground electrode plug is inserted;

[0031] Figure 4b This is a side view of the protective door structure after the ground electrode plug is inserted;

[0032] Figure 5 This is a schematic diagram of the third protective door in the protective door structure of this application;

[0033] Figure 6 This is a schematic diagram of the structure of the first protective door and the second protective door in the protective door structure of this application;

[0034] Figure 7 This is a schematic diagram of the base structure in the protective door structure of this application;

[0035] Figure 8 This is a front view of the protective door structure in this application, showing all three-pronged plugs inserted into the socket.

[0036] In the figure: protective door component 100; base 101; cover 102; plug hole 103; first plug hole 103a; second plug hole 103b; third plug hole 103c; first plug 104; first protective door 1; second protective door 2; third protective door 3; first plug contact area 11; elastic component 4; protective door connecting part 5; first limiting part 21; second limiting part 31; third plug contact area 32; first protrusion 12; second protrusion 13; first slide groove 14; first boss 15; third protrusion 33; second slide groove 34. Detailed Implementation

[0037] The specific embodiments of the present invention are further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the description of the following embodiments.

[0038] The socket includes a socket body and a protective door structure. The socket body includes multiple sleeves with clamping arm structures. One end of each sleeve is connected to the power supply of the circuit, and the other end is used to connect to the plug. The sleeve has a clamping effect and can cooperate with the plug to achieve a clamping connection, which can fix and limit the plug.

[0039] The protective door structure has a protective door component 100 corresponding to the socket sleeve, used to cover the socket sleeve inside the socket when the socket is not in use, preventing small objects from contacting the socket sleeve and causing safety issues. Figure 1As shown, this application provides a protective door structure for a DC socket, which is used in DC sockets to reduce the size of the DC socket. Furthermore, to facilitate understanding of the technical solution of this application, [further details can be added]. Figure 3a In this design, the direction perpendicular to the paper is defined as the third direction (i.e., the thickness direction of the socket), the vertical direction is defined as the first direction, and the horizontal direction is defined as the second direction, wherein the third direction, the first direction, and the second direction are perpendicular to each other.

[0040] The protective door structure of the DC socket includes a protective door component 100 and an elastic component 4. The protective door component 100 includes a first protective door 1, a second protective door 2, and a third protective door 3 for blocking the first plug hole 103a, the second plug hole 103b, and the third plug hole 103c of the socket. The first plug hole 103a, the second plug hole 103b, and the third plug hole 103c are used for the insertion of a three-prong plug with a grounding electrode. The first protective door 1, the second protective door 2, and the third protective door 3 block the three-prong socket and the three-prong plug hole (i.e., the first plug hole 103a, the second plug hole 103b, and the third plug hole 103c) inside the socket.

[0041] Preferably, to address the special structure of the existing DC three-prong plug, the second plug hole 103b and the third plug hole 103c are rectangular, with their lengths and widths being approximately the same. The longer side of the second plug hole 103b is in the second direction, while the longer side of the third plug hole 103c is in the first direction. Therefore, if the third protective door 3 moves in the first direction, it needs to move a relatively long distance to avoid the third plug hole 103c. Thus, this embodiment employs a technical solution where the third protective door 3 moves left and right, and the first protective door 1 and the second protective door 2 move up and down along the first direction. The distance the first protective door 1 and the second protective door 2 move downwards along the first direction is less than the length of the third plug hole 103c, thereby reducing the distance each protective door moves, reducing the volume of the protective door structure, and consequently reducing the overall volume of the socket.

[0042] In one possible implementation, the protective door structure of the DC socket is a modular structure, that is, the structure is an integral whole, including a housing and a protective door component 100 and an elastic component 4 disposed within the housing. After the first protective door 1, the second protective door 2, the third protective door 3 and the elastic component 4 are installed in the housing to form a protective door module, they are detachably installed in the socket body to form a complete socket. The housing is provided with a modular socket hole for a three-prong plug to pass through, thereby shielding and protecting the socket socket. This modular structure has the advantages of convenient installation and aesthetically pleasing structure, and can improve the efficiency of socket production and installation. The housing includes a base 101 and a cover 102. The protective door component 100 is disposed within the base 101, and the cover 102 can serve as the socket cover or be shielded by the socket panel.

[0043] In another possible implementation, the protective door structure of the DC socket is a modular structure installed inside the socket. Specifically, the base 101 shown in the figure serves as a partition between the protective door structure and the socket body, and the cover 102 is the socket's panel. The first plug hole 103a, the second plug hole 103b, and the third plug hole 103c in the figure are the socket's three-prong plugs. During socket installation, the various components of the protective door structure are distributed and installed on the partition, thereby shielding and protecting the socket's inserts to prevent small objects from contacting them and causing electric shock. Figure 1 The base 101 and the cover 102 can be understood as the housing of the protective door module, or as part of the housing of the socket, and both fall within the scope of protection of this application.

[0044] Taking the first possible implementation as an example, the protective door structure of the DC socket is a modular structure, which includes a base 101, a faceplate 102, and a protective door component 100 disposed within the base 101. The base 101 is provided with an installation and limiting structure for installing and limiting the protective door component 100. The faceplate 102 is fixedly installed to the base 101 along a third direction (i.e., the thickness direction of the socket). The faceplate 102 is provided with a plug hole 103, such as... Figure 2 , Figure 3b as well as Figure 4b As shown, the plug hole 103 includes a first plug hole 103a, a second plug hole 103b, and a third plug hole 103c. The first plug hole 103a, the second plug hole 103b, and the third plug hole 103c correspond to the first plug 104, the second plug (not shown in the figure), and the third plug (not shown in the figure) on the three-prong plug, respectively. They can cooperate with each other and connect or disconnect the power supply of the electrical equipment by plugging and unplugging. In this application, the first plug 104 is the ground plug, the second plug is the L plug, and the third plug is the N plug.

[0045] Preferably, the protective door component 100 includes: a first protective door 1, a second protective door 2, and a third protective door 3. The first protective door 1 includes a first plug contact area 11 with a beveled structure. The first plug contact area 11 of the first protective door 1 is used to block the first plug hole 103a. The second protective door 2 is used to block the second plug hole 103b. The third protective door 3 is used to block the third plug hole 103c, so as to prevent small objects from entering the plug hole 103 and contacting the socket, causing an electric shock accident and endangering personal safety.

[0046] The first protective door 1 and the second protective door 2 are integrally formed and configured to move up and down along a first direction. The elastic component 4 is connected to the first protective door 1 or the second protective door 2. In this embodiment, the elastic component 4 is provided between the first protective door 1 and the base 101. Under the action of the elastic component 4, the first protective door 1 and the second protective door 2 have potential energy upward along the first direction. When the socket is not in use, the elastic component 4 causes the first protective door 1 and the second protective door 2 to block the first plug hole 103a and the second plug hole 103b respectively. The third protective door 3 is configured to move left and right along a second direction. A limiting structure is also provided between the first protective door 1 or the second protective door 2 and the third protective door 3. The limiting structure is used to limit the third protective door 3 to move to the left along the second direction from the third plug hole 103c to the second plug hole 103b, so that the third protective door 3 is located at the position blocking the third plug hole 103c.

[0047] Normally, for safety reasons, the ground pin of a three-prong plug needs to be longer than the other two pins. This ensures that the electrical equipment is in a grounded protection state before the power is connected, improving the safety level. Therefore, the first plug 104 is longer than the other two pins. The first plug 104 first contacts the first plug contact area 11 of the first protective door 1. Because the first plug contact area 11 is inclined, during the insertion of the first plug 104 into the first plug hole 103a, the first plug 104 exerts a downward force in the first direction on the first protective door 1 and the second protective door 2, driving the first protective door 1 and the second protective door 2 to move downward in the first direction to avoid obstacles. The first plug hole 103a and the second plug hole 103b are described. At the same time, after the first protective door 1 and the second protective door 2 move downward a certain distance in the first direction, the second protective door 2 releases its restriction on the third protective door 3, so that the third protective door 3 can move to the left in the second direction from the third plug hole 103c to the second plug hole 103b to avoid the third plug hole 103c. In this way, the first protective door 1, the second protective door 2 and the third protective door 3 are all misaligned with the first plug hole 103a, the second plug hole 103b and the third plug hole 103c respectively, avoiding the first plug hole 103a, the second plug hole 103b and the third plug hole 103c.

[0048] Of course, in other embodiments, the first plug contact area 11 can be a reverse slope with a channel at the lower part. The first plug 104 contacts the slope and applies a pushing force, which can drive the first protective door and the second protective door to move upward in the first direction. Then, the first plug 104 slides down the slope in the first direction and inserts into the channel to connect with the corresponding ground electrode socket, so that the first protective door 1 and the second protective door 2 avoid the first plug hole 103a and the second plug hole 103b. At this time, the limiting structure between the second protective door and the third protective door can also be adjusted accordingly, so that when the first protective door and the second protective door move upward in the first direction, the limiting structure can release the limiting of the third protective door, so that the third protective door can move in the direction of the second plug hole 103b in the second direction. To avoid the third plug hole 103c, in this embodiment, the elastic member 4 gives the first protective door 1 and the second protective door 2 the potential energy to move downward in the first direction. At this time, the elastic member 4 can be a tension spring. When the plug is pulled out, the first protective door 1 and the second protective door 2 move downward in the first direction under the tension of the elastic member 4. The limiting structure drives the third protective door 3 to move away from the second plug hole 103b in the second direction. The first protective door 1, the second protective door 2 and the third protective door 3 simultaneously block the first plug hole 103a, the second plug hole 103b and the third plug hole 103c respectively. All of this is within the protection scope of this application and will not be elaborated further. This application takes the first plug 104 driving the first protective door 1 and the second protective door 2 to move downward as an example for explanation.

[0049] By designing the first protective door 1 and the second protective door 2 as an integrated structure, the protection structure can be simplified, and the efficiency of production and installation can be improved. Furthermore, a limiting structure is set between the second protective door 2 and the third protective door 3, so that the second protective door 2 limits the third protective door 3. The limiting of the third protective door 3 is only released after the ground plug is connected. Without the ground plug inserted, the second protective door 2 and the third protective door 3 cannot be opened. This design can greatly improve the safety of the socket, ensure electrical safety, prevent electric shock accidents, and solve the problem of poor safety of traditional sockets.

[0050] Compared to existing technologies, this application, through the above-mentioned structural design, integrates the first protective door 1 and the second protective door 2 into one unit, and designs and installs the third protective door 3 separately. This allows the first protective door 1 and the second protective door 2 to move up and down along the second direction, while the third protective door 3 moves left and right along the first direction. This design can greatly reduce the overall size of the socket, save production costs, improve production and installation efficiency, and make the socket structure compact and aesthetically pleasing.

[0051] Preferred, such as Figure 4aAs shown, the limiting structure includes a first limiting part 21 and a second limiting part 31. The first limiting part 21 is disposed on one side of the second protective door 2, and the second limiting part 31 is disposed on one side of the third protective door 3. The first limiting part 21 and the second limiting part 31 are disposed opposite to each other. Through the mutual cooperation of the first limiting part 21 and the second limiting part 31, the third protective door 3 is limited.

[0052] Furthermore, such as Figure 4a As shown, the first limiting part 21 and the second limiting part 31 can be mutually cooperating inclined surfaces. The obtuse or acute angle formed by the first limiting part 21 and the second direction is complementary to the acute or obtuse angle formed by the second limiting part 31 and the second direction. The first limiting part 21 is placed below the second limiting part 31 to limit the third protective door 3. The inclined surface design allows the second protective door 2 to gradually change its limiting distance to the third protective door 3. If the second protective door 2 moves downward a little, the third protective door 3 can also move to the left a little. Preferably, the inclination angle of the first limiting part 21 and the inclination angle of the second limiting part are 45 degrees and 135 degrees, respectively. Of course, as another embodiment, the first limiting part 21 can also be a rod-shaped protrusion with its plane pressing against the third protective door 3. In this case, the second protective door 2 needs to move downward so that the protrusion completely avoids the third protective door 3 before the third protective door 3 can move.

[0053] Furthermore, Figure 5 A schematic diagram of the structure of the third protective door 3 in a preferred embodiment is shown, as follows: Figure 5 As shown, the third protective door 3 also includes a third plug contact area 32, which is a sloping structure used to block the third plug hole 103c. The height of the sloping surface is lower on the side away from the limiting structure and higher on the side closer to the limiting structure, and it tilts in the second direction. By providing a sloping third plug contact area 32 on the third protective door 3, when the third plug contacts and presses against the third plug contact area 32, the third plug generates a force on the third protective door 3 that moves to the left in the second direction. The third protective door 3 moves to the left in the second direction, and finally, the first limiting part 21 abuts against the second limiting part 31, and the third protective door 3 releases its obstruction of the third plug hole 103c, allowing the third plug to be smoothly inserted into the third plug hole 103c.

[0054] When the plug is pulled out of the socket, the first protective door 1 and the second protective door 2, under the action of the elastic member 4, move upward in the first direction to block the first plug hole 103a and the second plug hole 103b. At the same time, due to the abutment of the first limiting part 21 and the second limiting part 31, the second protective door 2 pushes the third protective door 3 to move to the right in the second direction away from the second plug hole 103b through the first limiting part 21 to block the third plug hole 103c. Finally, the third protective door 3 achieves the blocking effect on the third plug hole 103c. It should be noted that, compared to the first protective door 1 and the second protective door 2 moving first and the third protective door 3 moving later when the plug is inserted, in this process, the first protective door 1, the second protective door 2 and the third protective door 3 move synchronously when the plug is pulled out. The first plug 104 is longer than the second plug and the third plug. The second plug and the third plug are disconnected from the power supply first, and the first plug 104 is disconnected from the power supply later. The electrical equipment continues to be in a grounded protection state before being disconnected from the power supply. This design can improve the safety of electricity use. This embodiment only requires one elastic component 4 to simultaneously drive the first protective door 1, the second protective door 2, and the third protective door 3, resulting in a simple structure and reduced costs.

[0055] In one possible implementation, a second elastic element can be provided between the third protective door 3 and the base 101, replacing the third plug contact area 32 of the inclined structure. The second elastic element is positioned in a second direction, giving the third protective door 3 a force that allows it to move to the left in that direction. At the instant the second protective door 2 releases its restraint on the third protective door 3, the third protective door 3, under the action of the second elastic element, moves to the left in the second direction, releasing its obstruction of the third plug hole 103c, thus allowing the third plug to be smoothly inserted into the third plug hole 103c. (Example) Figure 8 The diagram shows the structure of the protective door of the DC socket when all three prongs are inserted. The elastic element can be a spring or an elastic component, and the elastic element can also be provided in both the contact area 32 of the third plug with the beveled structure.

[0056] In one possible implementation, the third protective door 3 is provided with a third plug contact area 32. A second elastic member can be provided between the third protective door 3 and the base 103. The second elastic member is positioned in a second direction, giving the third protective door 3 a force to move to the right in the second direction. When the plug is not inserted, the third protective door 3 blocks the third plug hole 103c under the action of the second elastic member. That is, the third protective door 3 can be provided with an independent reset elastic member, which blocks the third plug hole 103c without being driven to reset by the second protective door 2. However, this increases the number of components and the cost.

[0057] In one possible implementation, the first limiting part 21 of the limiting structure can be a rod-shaped protrusion extending from one side of the bottom of the second protective door 2, and the second limiting part 31 can be a groove provided on one side of the third protective door 3. The groove partially cooperates with the protrusion, that is, the depth of the groove is less than the length of the protrusion. When the plug is not inserted, the second protective door 2 and the third protective door 3 are a certain distance apart in the second direction. Of course, the limiting structure can also be just the first limiting part 21 provided between the second protective door 2 and the third protective door 3. The first limiting part 21 can be a rod-shaped protrusion extending from one side of the bottom of the second protective door 2 or the third protective door 3. When the plug is not inserted, the first limiting part 21 keeps the second protective door 2 and the third protective door 3 a certain distance apart in the second direction.

[0058] Obviously, there can be many embodiments of the limiting structure, which will not be listed one by one here. Any features that are similar in structure and have the same function as this embodiment are within the protection scope of this application.

[0059] Preferred, Figure 6 A schematic diagram of the structure of the first protective door 1 and the second protective door 2 in a preferred embodiment is shown. Figure 7 A schematic diagram of the structure of the base 101 in a preferred embodiment is shown, as follows: Figure 3a , Figure 6 and Figure 7 As shown, the first protective door 1 has a first protrusion 12 along the first direction, and the base 101 has a second protrusion 13 along the first direction. The first protrusion 12 and the second protrusion 13 are on the same straight line. The two ends of the elastic member 4 are respectively installed on the first protrusion 12 and the second protrusion 13. By providing the first protrusion 12 and the second protrusion 13 on the first protective door 1 and the base 101 respectively, the elastic member 4 can be limited and fixed, preventing the position of the elastic member 4 from shifting during the use of the socket and affecting the service life of the socket. Of course, in a less desirable embodiment, a protrusion can also be provided between the first protective door 1 and the base, or no protrusion can be provided. Alternatively, the protrusion can be replaced with a groove structure, and the elastic member 4 can be embedded in the groove structure for limitation and fixation. All features with similar structure and the same function as this embodiment are within the scope of protection of this application.

[0060] Preferred, such as Figure 6 and Figure 7As shown, the first protective door 1 is provided with a first sliding groove 14 along a first direction, and the base 101 is provided with a first protrusion 15 that cooperates with the first sliding groove 14. In order to enhance the stability of the installation of the first protective door 1, the first sliding groove 14 and the first protrusion 15 can be provided as two pairs. Of course, in other embodiments, they can also be one or more pairs, which is not required here. The first sliding groove 14 can also be provided on the base 101, and correspondingly, the first protrusion 15 is provided on the first protective door 1. It can be seen that this structural feature can have a variety of transformations and combinations. All those who can think of it by those skilled in the art are within the protection scope of this application.

[0061] Preferred, such as Figure 5 and Figure 7 As shown, the third protective door 3 is provided with a third protrusion 33 along the second direction, and the base 101 is provided with a second sliding groove 34 that mates with the third protrusion 33. In this embodiment, since the third protective door 3 is smaller in volume than the combination of the first protective door 1 and the second protective door 2, the third protrusion 33 and the second sliding groove 34 can be set as a pair. Of course, in other embodiments, there can be multiple pairs. This structural feature can have various transformations and combinations, and all that can be conceived by those skilled in the art are within the scope of protection of this application.

[0062] By providing a first sliding groove 14 on the first protective door 1 and a first protrusion 15 that cooperates with the first sliding groove 14 on the base 101; providing a third protrusion 33 on the third protective door 3 and a second sliding groove 34 on the base 101, the first protective door 1 and the second protective door 2 can slide along the first direction, and the third protective door 3 can slide along the second direction, while also serving as a limiting function.

[0063] Furthermore, the elastic component 4 can be a compression spring, or it can be a torsion spring, an elastic rubber rod, or other elastic components. Any component with the same function and similar structure is within the scope of protection of this application.

[0064] Preferably, the first plug hole 103a is circular, with a diameter greater than the width of the second plug hole 103b but less than its length. The first protective door 1 is used to shield between the grounding sleeve and the first plug hole 103a, partially shielding the first plug hole 103a to further reduce the movement distance of each protective door. The first protective door 1 shields the grounding sleeve and does not cause any safety issues. Thus, in this embodiment, the distance the first protective door 1 and the second protective door 2 move downward along the first direction is equal to the width of the second plug hole 103b, minimizing the space occupied by the protective door structure. Of course, in other embodiments, the movement distance of the first protective door 1 and the second protective door 2 can be slightly increased to reduce the requirements for processing accuracy. For example, the distance the first protective door 1 and the second protective door 2 move downward along the first direction can be greater than or equal to the width of the second plug hole 103b, but less than 110% of the width of the second plug hole 103b.

[0065] Correspondingly, preferred, such as Figure 3a As shown, the first protective door 1 and the second protective door 2 are rectangular parallelepipeds, with their length directions aligned in a second direction. An integrally formed protective door connecting part 5 is provided between the first protective door 1 and the second protective door 2. The connecting part 5 is a rod-shaped structure, with its two ends connected to the first protective door 1 and the second protective door 2 respectively, and perpendicular to the first and second protective doors 1 and 2 along a first direction. A first limiting part 21 extends from the connection point between the second protective door 2 and the connecting part 5 towards the third protective door 2. The third protective door 3 includes a third plug contact area 32 for blocking the third plug hole 103c. A second limiting part 31 is provided on the side of the third plug contact area 32 closest to the second protective door 2. The sides where the first limiting part 21 and the second limiting part 31 abut are complementary bevels.

[0066] Furthermore, such as Figure 2As shown, the first plug contact area 11 of the first protective door 1 partially obscures the first plug hole 103a, and a boss structure is provided on the top of the first plug contact area 11. By designing the first protective door 1 to partially obscure the first plug hole 103a, the difficulty of inserting the first plug 104 into the first plug hole 103a can be reduced. At the same time, the boss structure on the top of the first plug contact area 11 can prevent small objects from being inserted into the first plug hole 103a, increasing the safety of the socket. Specifically, the width of the cuboid structure of the first protective door 1 is less than or equal to the width of the cuboid structure of the second protective door 2. The cuboid structure of the first protective door 1 obscures half of the first plug hole 103a, and a boss structure is provided on the side of the cuboid structure of the first protective door 1 along the first direction. The boss structure at least obscures the center of the first plug hole 103a, and the length and width of the boss structure are less than the radius of the first plug hole 103a. In a less desirable embodiment, the first protective door 1 can be configured to fully obscure the first plug hole 103a, which is within the scope of protection of this application. Of course, in other embodiments, the structures of the second plug hole 103b and the third plug hole 103c may not be absolutely rectangular; for example, they may be elliptical. Any structure design similar to this, used to accommodate the special structure of a conventional DC three-prong plug, is within the scope of protection of this application.

[0067] The protective door structure of the DC socket provided in this application is used in DC sockets. Under the premise of ensuring smooth sliding of the protective door and without increasing material costs, it achieves the function of preventing electric shock and providing safety protection through the simple interaction between the protective doors. It has the characteristics of high safety, few parts (only one spring to realize the movement of two parts), simple assembly, and low cost.

[0068] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0069] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A protective door structure for a DC socket, comprising a first protective door (1), a second protective door (2), and a third protective door (3) for respectively blocking a first plug hole (103a), a second plug hole (103b), and a third plug hole (103c) of the socket, wherein the second plug hole (103b) and the third plug hole (103c) are rectangular, and the length side of the second plug hole (103b) is in a second direction, and the length side of the third plug hole (103c) is in a first direction, characterized in that, The first protective door (1) includes a first plug contact area (11) with a beveled structure, and the first plug contact area (11) of the first protective door (1) blocks the first plug hole (103a). The first protective door (1) and the second protective door (2) are integrally formed and configured to move along a first direction. The elastic component (4) is connected to the first protective door (1) or the second protective door (2) to drive the first protective door (1) and the second protective door (2) to move along the first direction and respectively block the first plug hole (103a) and the second plug hole (103b). The third protective door (3) is configured to move along a second direction, which is perpendicular to the first direction. A limiting structure is provided between the first protective door (1) or the second protective door (2) and the third protective door (3). The limiting structure is used to limit the movement of the third protective door (3) along the second direction from the third plug hole (103c) to the second plug hole (103b), so that the third protective door (3) is located at the position that blocks the third plug hole (103c). When the first plug contact area (11) of the first protective door (1) is driven by force to move the first protective door (1) and the second protective door (2) along the first direction, the first protective door (1) and the second protective door (2) avoid the first plug hole (103a) and the second plug hole (103b). At the same time, the limiting structure releases its limitation on the third protective door (3). The third protective door (3) moves from the position that blocks the third plug hole (103c) along the second direction toward the second plug hole (103b) and avoids the third plug hole (103c).

2. The protective door structure of the DC socket according to claim 1, characterized in that, The limiting structure includes a first limiting part (21) disposed on the second protective door (2) and a second limiting part (31) disposed on the third protective door (3). The first limiting part (21) and the second limiting part (31) are mutually cooperating inclined surfaces. The obtuse angle or acute angle formed by the first limiting part (21) and the second direction is complementary to the acute angle or obtuse angle formed by the second limiting part (31) and the second direction.

3. The protective door structure of the DC socket according to claim 2, characterized in that, The first limiting part (21) is placed below the second limiting part (31). The third protective door (3) also includes a third plug contact area (32). The third plug contact area (32) is an inclined surface. The height of the inclined surface is low on the side away from the limiting structure and high on the side close to the limiting structure, and is inclined along the second direction.

4. The protective door structure of the DC socket according to claim 3, characterized in that, While the elastic component (4) drives the first protective door (1) and the second protective door (2) to move upward or downward along the first direction to block the first plug hole (103a) and the second plug hole (103b), the second protective door (2) drives the third protective door (3) to move away from the second plug hole (103b) along the second direction to block the third plug hole (103c) through the limiting structure.

5. The protective door structure of the DC socket according to claim 1, characterized in that, The protective door module is formed by installing a housing, a first protective door (1), a second protective door (2), a third protective door (3), and an elastic component (4) inside the housing. The housing is provided with a module socket for a three-prong plug to pass through, and the protective door module is detachably installed in the socket body.

6. The protective door structure of the DC socket according to claim 1, characterized in that, The distance that the first protective door (1) and the second protective door (2) move downward in the first direction is less than the length of the third plug hole (103c).

7. The protective door structure of the DC socket according to claim 6, characterized in that, The first plug hole (103a) is a circular structure. The diameter of the first plug hole (103a) is greater than the width of the second plug hole (103b) and less than the length of the second plug hole (103b). The first protective door (1) is used to block the ground socket and the first plug hole (103a), and only partially blocks the first plug hole (103a).

8. The protective door structure of the DC socket according to claim 7, characterized in that, The distance by which the first protective door (1) and the second protective door (2) move downward in the first direction is equal to the width of the second plug hole (103b).

9. The protective door structure of the DC socket according to claim 7, characterized in that, The distance by which the first protective door (1) and the second protective door (2) move downward in the first direction is greater than or equal to the width of the second plug hole (103b) and less than 110% of the width of the second plug hole (103b).

10. The protective door structure of the DC socket according to claim 7, characterized in that, The first protective door (1) and the second protective door (2) are cuboid structures. The length direction of the first protective door (1) and the second protective door (2) is in the second direction. An integrally formed protective door connecting part (5) is provided between the first protective door (1) and the second protective door (2). The protective door connecting part (5) is a rod-shaped structure, with its two ends connected to the first protective door (1) and the second protective door (2) respectively, and perpendicular to the first protective door (1) and the second protective door (2) along the first direction.

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