Power connection waterproof structure

Abstract

The utility model discloses a power connection waterproof structure, which is used for forming limit conductive connection between an external plug and an internal circuit, and comprises a shell and a protection door arranged in the shell and movably connected with the shell, and the shell is provided with a jack for the plug to insert; wherein the protection door is provided with a plugging part which abuts against the inner side surface of the jack and blocks the jack, a guide structure which guides the protection door to move and avoid when the plug abuts against the plugging part is arranged in the shell, and after the protection door moves and avoids, a channel for the plug to pass through and be connected with an internal circuit is formed in the shell. The device is different from a conventional connector structure with a protection door, and can provide a blocking effect for the jack through the protection door, thereby achieving the waterproof and dustproof functions.

Description

Technical Field

[0001] The utility model belongs to the technical field of socket waterproofing, and particularly relates to a power connection waterproof structure. Background Art

[0002] In existing electrical connectors (such as sockets), in terms of electrical safety, in order to protect the stable connection state between the plug of an electrical appliance and the connector, several protection mechanisms are provided to improve the connection stability and safety. Since the plug itself has standard specifications, common protection mechanisms or protection mechanisms are set inside the connector. The main method is to additionally provide some protection mechanisms, such as protection doors, waterproof rubber rings and other structures, in addition to the existing metal conductive mechanism for connecting the plug.

[0003] Among them, existing protection doors all have a slope (wedge surface) facing the outside of the socket. When the pins of the plug are inserted into the corresponding socket, a horizontal thrust component can be formed after contacting the slope of the protection door, causing the protection door to move towards the set side to form an avoidance space for the pins to pass through. When the plug is not connected, the protection door can block the socket. However, this blocking method is only limited to simply blocking the channel of the socket. Due to the slope structure provided on its surface, the end face of the existing protection door structure cannot fit well with the socket plane. Therefore, there is a gap between the protection door and the socket caused by non-assembly processes. This gap will directly cause water or dust to enter the socket, leading to safety hazards and problems such as electric leakage. Since the gap cannot be eliminated, in order to improve the waterproof or anti-foreign object entry effect of this type of connector, an independent waterproof or anti-foreign object entry structure needs to be provided inside the socket or outside the panel. Summary of the Utility Model

[0004] In order to solve the problems existing in the prior art, the utility model provides a power connection waterproof structure, aiming to optimize the existing electrical connector with a protection door. Through the optimized design of the protection door structure, the protection door can fit well with the socket end face in the initial state to form a certain waterproof effect, and at the same time, it can also realize the functions of plug-in avoidance and anti-single plugging in cooperation with the internal guiding structure.

[0005] The technical solution adopted by the utility model is as follows:

[0006] In a first aspect, the utility model provides a power connection waterproof structure for forming a limit conductive connection between an external plug and an internal circuit, including a housing and a protection door arranged inside the housing and movably connected to the housing. The housing has a socket for the plug to be inserted.

[0007] Among them, the protection door has a blocking portion that abuts against the inner surface of the socket and blocks the socket. Inside the housing, there is a guiding structure that guides the protection door to move and make way when the plug abuts against the blocking portion. After the protection door moves and makes way, a passage for the plug to pass through and connect to the internal circuit is formed inside the housing.

[0008] It should be noted that the protection door structure in the prior art generally has a wedge surface facing the socket, so that when the existing plug is inserted into the socket, it can obliquely push the protection door to move and make way. That is, there is a certain space inside the housing of the existing power connection structure with a protection door for the protection door to move. The existing way of moving and making way is that the protection door is guided to displace under its own force. However, the protection door structure in the present invention optimizes its structural design and has a blocking portion that fits against the inner side of the socket and forms a certain sealing effect. The force that pushes the protection door itself does not cause the protection door to make way, but the protection door makes way through the guiding structure provided inside the housing. By making way, it means that the protection door structure changes the occupied space in the housing in a way of displacement or non-displacement. There are various ways of making way, including the two independent protection doors corresponding to the two sockets representing L and N levels being respectively forced to make way, and also including the way of non-displacement occupied space change such as contraction and expansion of the protection door as an overall linkage structure, or the way of overall displacement.

[0009] It should also be noted that the so-called waterproofing of the power connection and waterproof structure in the present invention is not limited to its specific waterproofing effect, that is, both the effect of preventing splashing water and the effect of preventing water from entering under a certain water depth are included. The specific effect depends on the structural design of the socket and the blocking portion of the protection door and the assembly effect. And the waterproofing is the effect when there is no external object inserted into the socket. Once the socket is inserted and the protection door is pushed to displace, the waterproofing effect at the protection door is lost.

[0010] As long as the protection door has a blocking portion that blocks the end face of the socket from the inside, it can achieve a certain waterproofing effect. During specific implementation, its structural design will be optimized according to requirements to achieve different waterproofing levels. And waterproofing is just a subordinate concept of preventing foreign objects from entering the inside of the socket. Those skilled in the art can understand that the so-called waterproofing also includes the effect of preventing other foreign objects from entering, such as dust prevention, prevention of flocculent combustibles, etc.

[0011] The so-called blocking part is a structure that can cover the inner opening end face of the socket and fill the gap. The structure has several implementation methods and is divided into hard and soft types according to whether it is deformed. The hard structure mainly fits and blocks the socket in a manner of fitting and blocking, and has at least one annular surface that can fit the inner opening edge of the socket, but is not limited to the structural design of the inner and outer sides of the annular surface. It only needs to ensure that the annular surface fits the inner opening edge and blocks the gap. The soft structure is not limited to the way it fits or fills, nor is it limited to whether its area is larger than the inner opening end face of the socket. It only needs to deform to a certain extent when it fits on the inner end face of the socket to block the gap.

[0012] In combination with the first aspect, the utility model provides a first implementation of the first aspect, wherein the protection door is an integrated structure that blocks at least two sockets or a structure that includes a plurality of independent and linkage-displaced sub-parts;

[0013] The housing is also provided with an anti-single-insertion structure for guiding the protective door to not completely move to avoid contact with an object when a single socket is inserted.

[0014] It should be noted that the so-called incomplete movement avoidance means that only when an object is inserted into a single socket and contacts the protective door, the protective door at the corresponding socket does not move, or it moves as a whole / independently but the displacement is not enough to create enough avoidance space, so that the object can pass through the protective door and connect to the internal circuit, thereby preventing single-plug electric shock.

[0015] In combination with the first aspect, the utility model provides a second implementation of the first aspect, wherein the shell has an inner opening corresponding to a single socket and for a plug passing through a protective door to connect to an internal circuit, and a waterproof rubber ring is provided at the inner opening, the waterproof rubber ring having a through hole for the plug to pass through and fit the surface of the plug.

[0016] In combination with the first aspect or several embodiments of the first aspect, the utility model provides a third embodiment of the first aspect, wherein the protective door includes two sub-parts corresponding to different sockets and respectively having a blocking part, and the two sub-parts are elastically connected. When the plug pushes the protective door to be displaced under the guidance of the guide structure, the two sub-parts overcome the elastic force and contract / expand to move to avoid.

[0017] It should be noted that the protection door defined above includes two sub-parts, which means that it has a partial structure with two corresponding sockets. This is not limited to independent sub-parts, but also includes a structural design that is entirely or partially elastic, as long as there is an elastically connected structure corresponding to the two blocking parts that block the sockets. The so-called separate blocking parts also include solutions with separate independent blocking parts and solutions with one integral blocking part covering two sockets.

[0018] It should also be noted that the so-called state change of the two sub-parts to overcome the elastic force to shrink / expand refers to the freedom of relative displacement between the two sub-parts due to the elastic connection relationship, and the two sub-parts themselves will produce a relative displacement to overcome the elastic force due to the direction of the external force. This relative displacement will cause the blocking part that originally covered the socket to lose its shielding effect on the socket, thereby avoiding the plug pins to pass through the protective door smoothly. In the initial state, the elastic force between the two sub-parts is not limited in size and direction, but once the force is applied, it must overcome the elastic force to produce displacement. The role of the elastic connection is to keep the two sub-parts able to always cover the two sockets when they are not affected by external forces.

[0019] The guiding structure is used to guide and constrain the displacement direction of the two sub-parts. Without the guiding structure, the two sub-parts cannot achieve the displacement that overcomes the elastic force, that is, the guiding structure and the driving force of the external plug work together to cause the two sub-parts to displace relative to each other, and after the two sub-parts are displaced to appropriate positions, an avoidance space is formed for the plug pins to pass through. The avoidance space can be a gap formed by the stretching between the two sub-parts, or it can be the space on the outside after the two sub-parts are contracted.

[0020] In combination with the third embodiment of the first aspect, the utility model provides a fourth embodiment of the first aspect, wherein the guide structure is a guide portion with a slope arranged in the shell, and the sub-portion has a door slope that contacts and slides with the slope of the guide portion.

[0021] In combination with the third embodiment of the first aspect, the utility model provides a fifth embodiment of the first aspect, wherein the protective door comprises two slidingly connected sub-parts, and a first elastic member is provided between the sub-parts to always provide an elastic force for outward expansion. The plug pushes the protective door so that the two sub-parts overcome the force of the first elastic member under the limitation of the guide structure and slide toward each other to form an escape space on the outside of the two sub-parts for the plug to pass through.

[0022] In combination with the third implementation of the first aspect, the utility model provides a sixth implementation of the first aspect, wherein a reset mechanism is further provided in the housing to provide a thrust to the protective door always in the direction of the socket.

[0023] It should be noted that, unlike the elastic connection relationship between the sub-parts, both are mechanisms for providing a reset force. However, although the directionality of the elastic connection relationship between the sub-parts is not limited, the function of limiting the resistance to the relative displacement of the sub-parts provided is mainly in the plane perpendicular to the plug insertion direction. Therefore, in order to supplement the reset effect, the reset mechanism provided can provide additional reset force in the direction of the plug, improve stability, and also provide a better fit between the sealing portion and the socket, thereby improving the waterproof performance.

[0024] Combined with the sixth embodiment of the first aspect, the present invention provides a seventh embodiment of the first aspect. The reset mechanism is a reset push block arranged inside the housing and slidably connected to the housing, and a second elastic member for providing an elastic force is arranged between the reset push block and the housing.

[0025] Combined with the first embodiment of the first aspect, the present invention provides an eighth embodiment of the first aspect. The anti-single insertion structure is a hook portion arranged inside the housing corresponding to a single socket, corresponding to the sub-part and having a spacing. When any sub-part of the protection door is stressed and moves, the hook portion is clamped and limited with the stressed and moving sub-part.

[0026] Combined with the first aspect or several embodiments of the first aspect, the present invention provides a ninth embodiment of the first aspect. The housing includes a panel and a housing that are snap-fitted and clamped. The panel has several sockets, and the housing has a groove for installing the protection door. Channels corresponding to single sockets in the groove form an isolation inside the groove.

[0027] The so-called isolation means that each pin corresponding to the insertion of the plug can form an independent channel, at least ensuring that the channels corresponding to the neutral line and the live line are isolated from each other. Even if water or other foreign objects enter the channels, the isolation structure causes the water or conductive foreign objects in the two channels to be connected to form an internal conductive relationship.

[0028] The beneficial effects of the present invention are as follows:

[0029] (1) By optimizing and improving the structure of the electrical connector with a protection door, the present invention improves the existing connector in which the protection door only plays a role in preventing electric shock and cannot achieve a better waterproof and dustproof function. By providing a protection door with a blocking portion that fits the inner side of the socket to achieve complete fitting and occlusion of the socket, and at the same time, cooperating with the guiding structure inside the housing can also achieve the effect of the active avoidance of the protection door.

[0030] (2) The anti-single insertion structure provided by the present invention can form an overall linkage relationship on the optimized protection door, thus avoiding the danger of electric shock caused by the opening of the protection door after a foreign object is inserted unilaterally.

[0031] (3) By providing a waterproof rubber ring structure at the inner opening of the housing, the present invention cooperates with the protection door structure to provide a better waterproof effect.

[0032] (4) With the sub-part of the protection door connected by split sliding, the present invention can not only achieve smooth occlusion of the two sockets, but also provide a reset effect through the elastic member arranged inside. Description of the Drawings

[0033] Figure 1It is the first assembled axonometric view of the power connection and waterproof structure adapting to a two-pin plug in the embodiment of the present utility model;

[0034] Figure 2 It is the assembled plan view of the power connection and waterproof structure adapting to a two-pin plug in the embodiment of the present utility model;

[0035] Figure 3 It is the second assembled axonometric view of the power connection and waterproof structure adapting to a two-pin plug in the embodiment of the present utility model;

[0036] Figure 4 It is the first axonometric view of the disassembled state of the power connection and waterproof structure adapting to a two-pin plug in the embodiment of the present utility model;

[0037] Figure 5 It is the plan view of the disassembled state of the power connection and waterproof structure adapting to a two-pin plug in the embodiment of the present utility model;

[0038] Figure 6 It is the second axonometric view of the disassembled state of the power connection and waterproof structure adapting to a two-pin plug in the embodiment of the present utility model;

[0039] Figure 7 It is the third axonometric view of the disassembled state of the power connection and waterproof structure adapting to a two-pin plug in the embodiment of the present utility model;

[0040] Figure 8 It is the internal plan schematic view of the power connection and waterproof structure adapting to a two-pin plug when assembled and without the plug inserted in the embodiment of the present utility model;

[0041] Figure 9 It is the first internal axonometric view of the power connection and waterproof structure adapting to a two-pin plug when assembled and without the plug inserted in the embodiment of the present utility model;

[0042] Figure 10 It is the second internal axonometric view of the power connection and waterproof structure adapting to a two-pin plug when assembled and without the plug inserted in the embodiment of the present utility model;

[0043] Figure 11 It is the internal plan schematic view of the power connection and waterproof structure adapting to a two-pin plug when assembled and when the plug just touches and pushes down the protection door;

[0044] Figure 12 It is the internal axonometric view of the power connection and waterproof structure adapting to a two-pin plug when assembled and when the plug just touches and pushes down the protection door;

[0045] Figure 13 It is the internal plan schematic view of the power connection and waterproof structure adapting to a two-pin plug when assembled and when the plug fully opens and passes through the protection door;

[0046] Figure 14It is the first internal axonometric view of the power connection waterproof structure adapted to a two-pin plug in the embodiment of the present utility model, where the plug is fully pushed open and passes through the protection door;

[0047] Figure 15 It is the second internal axonometric view of the power connection waterproof structure adapted to a two-pin plug in the embodiment of the present utility model, where the plug is fully pushed open and passes through the protection door;

[0048] Figure 16 It is the axonometric view of the power connection waterproof structure adapted to a three-pin plug in the embodiment of the present utility model when the plug just makes contact;

[0049] Figure 17 It is the exploded schematic view of the power connection waterproof structure adapted to a three-pin plug in the embodiment of the present utility model when the plug just makes contact;

[0050] Figure 18 It is the schematic view of the protection door structure that adopts a rotation method for avoidance in the embodiment of the present utility model.

[0051] In the figure: 1 - panel, 2 - housing, 3 - socket, 4 - clip, 5 - card slot, 6 - sliding groove, 7 - inner opening, 8 - first elastic member, 9 - second elastic member, 10 - reset push block, 11 - protection door, 12 - door inclined surface, 13 - telescopic guiding portion, 14 - inclined surface. Detailed implementation manners

[0052] The following further explains the present utility model in conjunction with the attached drawings and specific embodiments.

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0054] Therefore, the detailed description of the embodiments of the present application provided in the drawings below is not intended to limit the scope of the present application that is required to be protected, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0055] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0056] In the description of the present application, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, in the description of the present application, if terms such as "first", "second", etc. are used, they are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0057] In addition, in the description of the present application, if terms such as "horizontal" and "vertical" are used, it does not mean that the components are required to be absolutely horizontal or hanging vertically, but they can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0058] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "linked" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0059] Embodiment 1:

[0060] This embodiment discloses a power connection and waterproof structure, which is arranged in a plug for connecting an electrical appliance and a connector of a live wire and a neutral wire circuit. In this embodiment, a socket is used as one of the subordinate objects for illustration. The plug includes two types: two-pin and three-pin, and the plug includes several metal pin structures.

[0061] It should be noted that the waterproof structure in this embodiment is a protection door mechanism arranged at the socket panel. The limiting methods include setting it as an independent protection door mechanism with a housing at the socket, or as a partial structure of the socket, and optimizing the structure of the part of the socket panel for placing the protection door.

[0062] Specifically, it includes a housing. The housing can be set as an independent structure at the front end of the socket connecting plug as described above, or can be described as a part of the socket housing structure. One end face of the housing has several sockets, including two sockets for the neutral wire and the live wire forming a standard two-pin plug, and three sockets for the ground wire, the neutral wire, and the live wire forming a standard three-pin plug. In this embodiment, a corresponding waterproof structure is mainly set for the sockets of the neutral wire and the live wire, but it is not limited to this.

[0063] Taking the two-pin socket as an example, a protection door that blocks the two-pin socket is provided inside the housing, and the protection door is movably connected to the housing. Among them, the protection door structure has a blocking part that blocks the socket from the inner end face of the socket and covers the gap by fitting the inner end face of the socket. A guiding structure is also provided inside the housing. After the protection door is pushed by an external plug, it will move inside the housing, and when moving, it will be restricted by the guiding structure to move in a specific direction, so as to form a channel connecting the socket inside the housing space. There is a conductor connecting the internal circuit in this channel, and the pins of the plug penetrate into the channel and connect to the conductor of the internal circuit to conduct electricity by contacting and pushing the protection door.

[0064] Among them, the so-called blocking part refers to a relatively structured part whose area occupied when fitting the inner port of the socket is not less than the area of the socket port. This blocking part can be a flat surface structure or a three-dimensional structure. As mentioned above, it can be a rigid structure or a soft structure. As an alternative, an annular surface that can abut against and block the edge of the inner end face of the socket can also achieve a sealing effect. However, in actual process, the secondary fitting effect of this annular surface itself after movement is poor, the assembly process requirements for parts are high, and the processing process is more complex than that of the blocking part. Therefore, the best way is for the blocking part to abut against the inner end face of the socket.

[0065] Among them, the waterproof function is achieved by the blocking part fitting and covering the inner port of the socket, and the so-called waterproof effect is not limited to a specific value, that is, any effect that can form a certain barrier to prevent water from entering the inside of the housing belongs to the waterproof function mentioned in this embodiment. During the implementation process, corresponding waterproof methods will be set according to the device requirements. For example:

[0066] As a method, an annular rubber sealing ring is provided at the edge of the inner port of the socket. When the blocking part fits, it can form a good pressing effect with the rubber ring, thereby improving its waterproof performance.

[0067] As a method, a rubber sealing material is provided on the blocking part, which can squeeze the edge of the inner port of the socket when fitting the inner port of the socket to form a certain deformation, can be embedded into a part of the inner port inward, and can also form a good waterproof effect.

[0068] Furthermore, there are various movement modes of the protection door structure in this embodiment, which are specifically as follows:

[0069] As one way, the protection door is used as an integral structure and slides parallel to the plane where the socket is located, that is, the sliding mode of the existing protection door is adopted, and the relatively large planar space of the general socket can be utilized. However, for this sliding avoidance method to achieve the waterproof effect, it has relatively high requirements for the assembly relationship of components and the sliding connection structure. That is, for the plugging effect of the socket, the clamping force in the socket direction has the best clamping and sealing effect, while the side sliding mode cannot provide a good clamping force in the socket direction. To achieve this effect, the slide rail needs to provide a large limiting effect for the protection door, which will result in a relatively large sliding damping of the protection door. And since the contact surface between the protection door and the pin in this embodiment is a plugging part with a flat surface, the thrust provided by the pin contacting the protection door is always perpendicular to the plugging part, and it cannot cooperate with the guiding structure to make it displace in the horizontal direction.

[0070] As one way, the protection door can be displaced in the housing in a direction perpendicular to the plugging part as a whole. This way can not only utilize the force provided by the pin as the driving force for the movement of the protection door, but also enable the protection door itself to have a better movement direction. By setting a reset mechanism to always provide a clamping force towards the inner port of the socket for the protection door, it thus has a better effect of preventing foreign objects from entering.

[0071] Furthermore, for the displacement mode of the protection door in the direction perpendicular to the plugging part, the guiding structure is defined.

[0072] Among them, the guiding structure is a slideway integrally formed with the housing in the housing, and can displace in a fixed direction after the protection door is pushed by the pin. The displacement of the protection door needs to form a straight channel in the housing along the socket direction, that is, avoid forming a channel for the pin to pass through. Therefore, for the displacement mode in the vertical direction, the corresponding technical effect can also be achieved by setting a suitable conductor structure connecting the internal circuit. For example, an elastic and retractable conductor structure is provided in the housing, and this conductor structure is arranged on the inner wall of the housing and is directly conducted with the neutral wire or live wire in the internal circuit. In the initial state, this conductor structure is blocked by the protection door or its associated structure and is in an elastically contracted state. When the protection door is pushed inward by an external pin, a gap is formed between it and the plane of the structure where the socket is located. Once the gap extends to a suitable size, at this time the conductor structure loses the limit of the protection door and pops into the channel to contact the pin. This way can also achieve the protection door to avoid forming a channel, that is, there is a conductor structure in this channel connected to the pin.

[0073] As another guiding method, a sliding limit structure with an included angle with the socket direction is provided inside the housing, which can be regarded as a kind of slide rail, and the protection door is matched with the slide rail for limited sliding. The pin gives a vertical thrust to the protection door, and through the guiding of the obliquely arranged slide rail, it has a displacement in a direction with an included angle with the direction perpendicular to the socket, so as to avoid and form a channel in the extending direction of the socket, causing the fixed conductor structure blocked by the protection door inside the housing to be exposed, and the pin can pass through the protection door and be connected to the conductor structure.

[0074] In this implementation manner, the guiding direction of the guiding structure may not be limited, that is, it includes several set directions, as long as there is an included angle between the displacement direction and the extension line of the socket direction. During the implementation process, generally, this included angle is set to 45 degrees. If the angle is too large, the horizontal component force will be small, and the force displacement damping of the protection door will be large, and a larger external thrust is required for the pin to push the protection door. If the angle is too small, a larger vertical space inside the entire housing is required because the horizontal displacement generated by the avoidance is less than the displacement in the extending direction of the socket.

[0075] As another guiding method, refer to Figure 18 a protection door structure shown in, which is rotationally connected to the housing, and a separately rotationally connected sub - part is provided for each socket. The arrow direction in the figure indicates the displacement mode of the sub - part corresponding to one socket. In this rotationally connected relationship, the guiding structure is the rotation axis mechanism of the rotational connection, that is, it restricts the sub - part of the protection door to only rotate in the corresponding direction inside the housing. The rotational blocking method can also provide a good blocking effect, and a torsion spring is provided at the rotational connection to provide a restoring force.

[0076] It should be noted that Figure 18 is only a schematic illustration of a principle, and the specific dimensions and assembly structures in the figure are not limited.

[0077] Furthermore, the protection door in this application includes three structural design methods of oblique displacement. One is an integral fixed type, that is, the whole is displaced and reset as a whole; one is a way of overall linkage displacement of several sub - parts and relative displacement between sub - parts; the other is that each socket is provided with an independent sub - part, and each is independently displaced.

[0078] Adopt the first integral fixed structure, that is, for different sockets, a protection door can be used to block and seal. In this setting method of the protection door, the guiding structure can be appropriately set at the corresponding position of the outer shell. The protection door has a hollow part. Once the protection door is displaced by force, the female guiding structure can guide it to displace obliquely downward. At this time, for one socket, since the edge of the protection door disengages from the channel occupied in the socket direction, a channel is formed in the socket direction here. And for the other socket, the oblique displacement of the protection door causes a hollow part on the protection door to correspond to the channel in the socket direction. At this time, the pin inserted into the corresponding socket can pass through the hollow part and enter the inner part of the outer shell to be connected to the conductor structure.

[0079] Adopt the second method of linkage of several sub - parts, that is, the protection door itself has several sub - parts. In this embodiment, taking two sockets corresponding to the neutral line and the live line as an example, it is limited to two sub - parts.

[0080] Both of the two sub - parts have blocking parts for blocking and sealing the corresponding side socket. And the two sub - parts are in a limit connection relationship, that is, when subjected to an external force, relative displacement in a specific direction can occur between the two sub - parts. And an elastic connecting piece is arranged between the two sub - parts, which always provides an elastic acting force between the two sub - parts to keep them in a relative movement trend.

[0081] The guiding structure provided inside the outer shell limits the protection door with two sub - parts. In the state without external force, the two sub - parts are restricted by the outer shell or the guiding structure to maintain a relative static relationship. At this time, the blocking parts of the two sub - parts can block the corresponding sockets. Once the plug is inserted, the pins contact both sub - parts at the same time and push them simultaneously. At this time, the two sub - parts are displaced inward by force. And under the restriction of the guiding structure, the two sub - parts will have a specific relative displacement. At this time, the relative displacement will overcome the elastic force of the elastic connecting piece. Once the external force is withdrawn, that is, when the plug is pulled out, the elastic connecting piece can push the two sub - parts to displace in the opposite direction. At this time, it still relies on the guiding structure for specific displacement to achieve the reset effect.

[0082] As a way, the connection relationship between the two sub - parts is a sliding connection, that is, the relative linear movement between them is restricted by the clamping structure arranged between the two components. This relative displacement can be regarded as the expansion and contraction state between the two sub - parts. Once pushed by the plug, the protection door as a whole is displaced inward. At this time, the two sub - parts will contract or expand. When contracting, the width of the whole protection door will continuously change, and finally its width is less than the distance between the two sockets, so that channels are formed at both sockets for the pins to pass through. And when expanding, a gap is formed between the protection doors. When this gap is larger than the gap between the two sockets, channels corresponding to the two sockets can also be formed.

[0083] In this embodiment, the contraction method is described in detail. Refer to Figures 1 - 16, the figure shows the schematic of the corresponding relationship formed by the housing alone and the mating plug.

[0084] Among them, referring to Figure 4 , it can be seen that the protection door itself is composed of two sub-parts. There are two telescopic guiding parts for connecting and limiting between the two sub-parts. The telescopic guiding part is a rod structure. Each sub-part is provided with a telescopic guiding part and a corresponding jack. By inserting the telescopic guiding part into the corresponding jack, two symmetrical linear sliding limiting structures are realized, so that only linear displacement in the opposite direction can occur between the two sub-parts.

[0085] A first elastic member is also provided between the two sub-parts. The first elastic member is always in a compressed state, that is, it provides an expanding force to the sub-parts on both sides and is restricted by the housing to always maintain the maximum gap in the housing without external force.

[0086] Referring to Figures 8 - 10 , there are two symmetrical slopes in the housing, and each sub-part is provided with a door slope corresponding to the slope. Through fitting contact and sliding connection, it can be seen in the internal plane structure diagram that the two slopes are symmetrically tapered. When the two sub-parts are subjected to a downward thrust, they will squeeze the first elastic member to contract inward, so as to form an avoidance space on the outside of the protection door for the pin to pass through. Referring to Figures 14 - 16 , that is, after the pin passes through, the two sub-parts contract to the minimum gap state. Once the plug is pulled outwards, the protection door loses the acting force and is pushed to expand to both sides by the restoring force provided by the first elastic member. When expanding, it is guided by the slope to displace obliquely upwards so as to block the corresponding socket again.

[0087] Furthermore, a reset mechanism is also provided in the housing, including a second elastic member and a reset push block pushed by the second elastic member. The structure of the reset push block is pushed by the second elastic member that is always in a compressed state and always abuts against the lower part of the protection door, providing a continuous thrust to the protection door to resist the socket. The reset mechanism can not only provide a reset force to the protection door, but also continuously block the socket when the protection door is not stressed, ensuring its good waterproof performance.

[0088] Furthermore, in the above different embodiments, an anti-single-insertion structure is provided in the housing, that is, it satisfies the effect that the protection door can be displaced as a whole to avoid, and at the same time can prevent the situation of electric shock when a foreign object is inserted into a single socket and the protection door completely avoids.

[0089] Among them, for the integrated fixed type and the protection door scheme with several linked sub-parts, a hook groove is provided in the shell, and a hook portion is provided on the corresponding part of the protection door or each sub-part. When the protection door is subjected to force on one side, since the entire protection door has a reset mechanism to keep it in the initial position, the force on one side will cause the protection door to tilt as a whole, similar to the principle of a seesaw. When the protection door tilts on one side, the hook portion provided thereon can be stuck in the corresponding hook groove to form a limit. At this time, the protection door will produce a certain displacement, but the displacement amount is not enough to form sufficient avoidance space due to the limit of the hook portion and the hook groove, resulting in the structure of the socket inserted on one side being unable to contact the internal circuit, thereby achieving the corresponding anti-single insertion effect.

[0090] In targeting Figure 18 In the rotating connection protection door solution shown in , corresponding limiting structures can be provided at the rotating connection of the sub-parts of the protection doors on both sides, that is, the sub-part on one side rotates while the sub-part on the other side remains stationary, and the limiting structures can limit the rotating sub-parts from being able to completely rotate to avoid. Only when the sub-parts on both sides rotate at the same time, the limiting structures at the rotating connection will move at the same time and staggered to achieve the effect of avoiding unlocking, and can also achieve the effect of preventing single insertion.

[0091] To further illustrate the function of the entire waterproof structure, refer to Figures 1 - 17 , and define the structure in detail.

[0092] The housing includes two parts that are connected to each other, namely, a panel and a shell. The panel is provided with a two-hole or three-hole socket, corresponding to the two-pin and three-pin plug structures.

[0093] The panel has two vertically extending surfaces, on which card slots are arranged, and on the corresponding part of the shell there are clips, and the two parts are connected in a detachable buckled state through the corresponding snap connection between the clips and the card slots.

[0094] The housing has a groove for arranging the protection door. The inner wall of the housing has a convex part extending inwards, and the convex part symmetrically forms two slopes, so as to guide the two sub-parts of the protection door to slide obliquely along the slopes.

[0095] There are three slide grooves at the bottom of the shell body, corresponding to the reset push block of the reset mechanism. The figure shows that the reset push block has three rods inserted into the corresponding three slide grooves respectively. A second elastic member is provided in one of the larger slide grooves, and the second elastic member is used to realize the thrust of the reset push block always toward the panel side.

[0096] The sockets on the corresponding panels on both sides of the bottom of the shell are also provided with two inner ports. The protective door is initially blocked between the inner ports and the sockets. After relative displacement, the inner ports and the sockets are connected to form a channel. Figure 16 In the embodiment, the pin passes through the socket and enters the inner port, and the inner port corresponds to the conductive structure.

[0097] In some embodiments, in order to improve the waterproof effect, a waterproof rubber ring is provided at the inner opening, that is, a rubber sleeve structure with openings. When the pins pass through, it will always fit on the surface of the pins to achieve a sealing effect.

[0098] The present utility model is not limited to the above optional embodiments, and anyone can obtain other various forms of products under the inspiration of the present utility model. The above specific embodiments should not be construed as limiting the protection scope of the present utility model. The protection scope of the present utility model should be defined by the claims, and the description can be used to interpret the claims.

Claims

1. A waterproof electrical connection structure, which allows an external plug to form a limited conductive connection with an internal circuit, characterized in that: It comprises a shell and a protective door (11) arranged in the shell and movably connected to the shell, and the shell has a socket (3) for inserting a plug; The protective door (11) has a blocking portion that abuts against the inner surface of the socket (3) and blocks the socket (3), and the housing has a guiding structure inside for guiding the protective door (11) to move and avoid the plug abutting against the blocking portion. After the protective door (11) moves and avoids, a passage is formed inside the housing for the plug to pass through and connect to the internal circuit.

2. The electrical connection waterproof structure according to claim 1, characterized in that: The protection door (11) is an integral structure that blocks at least two sockets (3) or a structure comprising a plurality of independent and linked displacement sub-parts; The housing also has a single-insertion prevention structure for guiding the protective door (11) to not completely move to avoid contact when a single insertion port (3) is inserted into an object.

3. The electrical connection waterproof structure according to claim 1, characterized in that: The housing has an inner opening (7) corresponding to the single socket (3) and for a plug passing through the protective door (11) to connect to the internal circuit. A waterproof rubber ring is provided at the inner opening (7), and the waterproof rubber ring has a through hole for the plug to pass through and fit the surface of the plug.

4. A waterproof structure for electrical connection according to any one of claims 1 to 3, characterized in that: The protection door (11) comprises two sub-parts corresponding to different sockets (3) and respectively having a blocking portion, the two sub-parts being elastically connected, and when the plug pushes the protection door (11) to be displaced under the guidance of the guide structure, the two sub-parts overcome the elastic force to contract / expand and move to avoid allowing the plug to connect to the internal circuit.

5. The electrical connection waterproof structure according to claim 4, characterized in that: The guide structure is a guide portion provided in the housing and having a slope (14); the sub-portion has a door slope (12) which contacts and slides with the slope (14) of the guide portion.

6. The electrical connection waterproof structure according to claim 4, characterized in that: The protective door (11) comprises two slidingly connected sub-parts, and a spacer is provided between the sub-parts to provide outward expansion at all times. The plug pushes the protective door (11) so that the two sub-parts overcome the action force of the first elastic part (8) under the limit of the guide structure and slide toward each other and shrink outside the two sub-parts to form an escape space for the plug to pass through.

7. The electrical connection waterproof structure according to claim 4, characterized in that: The housing is also provided with a reset mechanism for providing the protection door (11) with a thrust force always directed toward the socket (3).

8. The electrical connection waterproof structure according to claim 7, characterized in that: The reset mechanism is a reset push block (10) arranged in the housing and slidably connected to the housing, and a second elastic member (9) for providing elastic force is arranged between the reset push block (10) and the housing.

9. The electrical connection waterproof structure according to claim 2, characterized in that: The anti-single-insertion structure is a hook portion which is arranged at a location corresponding to a single socket (3) in the housing and corresponds to the sub-part and has a spacing therebetween. When any sub-part of the protection door (11) is independently subjected to force and moves, the hook portion is engaged and limited with the sub-part subjected to force and moves.

10. The electrical connection waterproof structure according to any one of claims 1 to 3, characterized in that: The housing comprises a panel (1) and a shell (2) which are snap-fitted and connected to each other, the panel (1) is provided with a plurality of sockets (3), the shell (2) has a groove for installing a protective door (11), and the groove has channels corresponding to the individual sockets (3) to form isolation within the groove.

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