CN219371490U - Waterproof extension line - Google Patents

Abstract

The utility model discloses a waterproof extension line, which comprises an extension line body, a connector and a waterproof shell, wherein the waterproof shell comprises a first waterproof shell and a second waterproof shell, one ends of the first waterproof shell and the second waterproof shell are respectively hinged to the upper surface and the lower surface of the periphery of the connector and can rotate up and down so as to open or buckle the first waterproof shell and the second waterproof shell to wrap the periphery of the connector; the waterproof sealing device comprises a first waterproof shell, a second waterproof shell and a connecting head, wherein the first waterproof shell is provided with a first inner cavity with a downward opening, the second waterproof shell is provided with a second inner cavity with an upward opening, annular sealing soft glue is arranged at the openings of the first waterproof shell and the second waterproof shell, after the first waterproof shell and the second waterproof shell are buckled up and down, the annular sealing soft glue of the first waterproof shell and the second waterproof shell are in sealing contact with each other to form a waterproof sealing cavity, and the connecting end of the connecting head is positioned in the waterproof sealing cavity. The waterproof performance is better, and the mode of hinging and buckling is adopted, so that the installation structure of the waterproof shell on the connector and the self opening and closing structure of the waterproof shell become simpler, and the waterproof shell is easy to produce and manufacture.

Description

Waterproof extension line

Technical Field

The utility model relates to the technical field of power supply extension lines, in particular to a waterproof extension line.

Background

The existing power extension line generally adopts a mode of directly plugging the wire plug, and has no waterproof structure outside the joint, so that the waterproof performance of the joint is not ideal, the safety performance of the power extension line and the wire joint is low, and certain potential safety hazard exists.

Later on, a power extension line to joint department carries out waterproof protection has appeared, and it includes the extension line body, installs connector on the extension line body and installs the connection shell on the electric wire plug, connector and electric wire plug assorted, the outer wall sliding connection of connector has the movable shell, the connection shell can cup joint the outer wall of electric wire plug and with the movable shell can dismantle and be connected. The connecting shell comprises a first shell and a second shell, the first shell is movably connected with the second shell through a connecting component, so that the first shell and the second shell can be unfolded and sleeved outside the wire plug, and the wire plug is convenient to connect with the movable shell. When the connecting shell is mounted in specific work, the second shell is pulled in a direction away from the first shell, and the second shell is enabled to be away from the first shell to a proper position under the action of the telescopic rod, so that the second shell is conveniently rotated to enable the connecting shell to be opened; then, after the first shell and the second shell are opened and sleeved outside the wire plug, the first shell and the second shell are folded, the telescopic rod is retracted into the groove, and the elastic sheet is matched with the spring, so that one ends of the first shell and the second shell are in sealing connection; meanwhile, the buckle is clamped with the buckling groove, so that the second shell and the other end of the second shell are connected, and the connecting shell is sleeved outside the wire plug. Meanwhile, an external thread is arranged on the outer wall of the movable shell, the inner diameter of the connecting shell is matched with the outer diameter of the movable shell, and an internal thread matched with the external thread is arranged on the inner wall of the connecting shell; when the electric wire plug is particularly operated, after the connecting shell is installed on the electric wire plug, the electric wire plug is inserted into the connecting head, then the movable shell moves towards the direction close to the connecting shell, and then the movable shell is rotated, so that the movable shell is in threaded connection with the connecting shell to protect the joint between the connecting head and the electric wire plug.

The waterproof performance of the joint can be improved in the structural form, but the structure is complex, the connecting shell is formed by connecting the first shell and the second shell, and the first shell and the second shell are matched with the spring by virtue of the telescopic rod and the elastic sheet; in addition, the waterproof sealing is realized through the threaded connection of the movable shell and the connecting shell, although the threaded connection has sealing performance, hidden danger of poor waterproof still exists between the mutual buckling surfaces of the first shell and the second shell, in addition, the first shell and the second shell are buckled and then are in threaded connection with the movable shell, the processing precision requirements on the first shell and the second shell are very high, otherwise, the phenomenon that the threaded connection is unsmooth and even the threaded connection is not easy occurs can be caused.

Therefore, a new technical solution is needed to solve the above problems.

Disclosure of Invention

In view of the above, the present utility model aims at overcoming the drawbacks of the prior art, and its main objective is to provide a waterproof extension cord, which has better waterproof performance, and adopts a hinged and buckled manner, so that the installation structure of the waterproof shell on the connector and the opening and closing structure of the waterproof shell become simpler, and the integral quick locking structure is easy to produce and manufacture, and has the advantages of quick locking and unlocking, and compared with the buckle of a single buckle piece, the double buckle piece structure is more stable in buckle.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the waterproof extension cord comprises an extension cord body, a connector and a waterproof shell, wherein the connector is connected to one end of the extension cord body, and the waterproof shell is arranged aiming at the connector;

the waterproof shell comprises a first waterproof shell and a second waterproof shell, one ends of the first waterproof shell and the second waterproof shell are respectively hinged to the upper surface and the lower surface of the periphery of the connector, and the first waterproof shell and the second waterproof shell can both rotate up and down relative to the connector so as to be opened or buckled and wrapped on the periphery of the connector;

the first waterproof shell is provided with a first inner cavity with a downward opening, the second waterproof shell is provided with a second inner cavity with an upward opening, annular sealing soft adhesives are arranged at the openings of the first waterproof shell and the second waterproof shell, after the first waterproof shell and the second waterproof shell are buckled up and down, the annular sealing soft adhesives of the first waterproof shell and the second waterproof shell are in sealing contact with each other to form a waterproof sealing cavity, and the inserting end of the connector is positioned in the waterproof sealing cavity;

the left side face and the right side face of the first waterproof shell are provided with buckling groove positions, the left side face and the right side face of the second waterproof shell are respectively connected with buckling pieces, and the buckling pieces can be buckled in the buckling groove positions in an openable mode. The waterproof shell is buckled and locked after being closed by the arrangement of the buckling piece, so that the operation is simple and convenient;

the buckling piece comprises a first buckling piece part and a second buckling piece part, wherein the inner end of the first buckling piece part is connected with the left side surface or the right side surface of the corresponding second waterproof shell through a first bendable part, the inner end of the second buckling piece part is connected with the outer end of the first buckling piece part through a second bendable part, and a buckling convex part is arranged on the inner side of the outer end of the second buckling piece part;

the first cramp portion is downwards overturned and attached to the left side face or the right side face of the corresponding second waterproof shell, the second cramp portion is upwards overturned and attached to the left side face or the right side face of the first waterproof shell, and the buckling convex portion is buckled in the corresponding buckling groove. The integrated quick locking structure has the advantages of quick locking and unlocking, and compared with a single buckle piece part buckle piece, the double buckle piece structure is more stable in buckle.

As a preferable scheme, the other ends of the first waterproof shell and the second waterproof shell are provided with wire outlet adapting holes, and the annular sealing soft rubber is filled in the wire outlet adapting holes to form deformable soft rubber adapting sealing parts, so that the wire body of the plug wire is clamped and sealed between the soft rubber adapting sealing parts of the first waterproof shell and the second waterproof shell.

As a preferable mode, the outer end of the first cramp part is also outwards provided with an extension part, and the extension part is arranged at a left-right distance from the second bendable part. Through the setting of extension, can compress tightly the fastener more easily for the waterproof shell is locked firmly and reliably to the fastener.

As a preferable scheme, the left-right spacing of the inner end of the second cramp portion is provided with two connecting portions, the second bendable portions are provided with two connecting portions which are respectively connected with the inner ends of the two connecting portions, the two connecting portions are connected with the outer end of the first cramp portion through the respective second bendable portions, the lengthening portion is located between the two second bendable portions, and the lengthening portion extends towards a gap between the two connecting portions. The structure design is ingenious, compact and reasonable, the setting of two connecting portions gives attention to the connection requirement required by the front-back length of the second cramp portion, and the lengthening portion is arranged by utilizing the gap between the two connecting portions and is convenient to operate when being buckled downwards.

As a preferable scheme, when the first waterproof shell and the second waterproof shell are opened, the first buckle piece part is outwards and obliquely downwards or in an arc shape and downwards extends, and the second buckle piece part is in a hook-shaped structure which extends obliquely downwards or in an arc shape and then upwards bends and extends. The first cramp part and the second cramp part can be well attached to the corresponding second waterproof shell and the first waterproof shell.

As a preferable scheme, the first inner cavity and/or the second inner cavity are/is convexly provided with an automatic adjusting wire pressing block towards each other. The wire rods with different wire diameters are convenient to compress and position.

As a preferable scheme, the automatic regulating line pressing block is an arc-shaped piece which is inserted into the first inner cavity and/or the second inner cavity and can be bent up and down, and the outer arch side of the arc-shaped piece which can be bent up and down is used as a line pressing surface. The requirement of automatically adjusting the pressing gap according to the wire rods with different diameters can be satisfied by using the up-and-down deformation of the arc-shaped sheet capable of being bent up and down. Preferably, a recess may be further provided at the outer arch side so as to position the wire body of the plug-in wire.

As a preferable scheme, the other end of the extension line body is connected with a plug, and the plug is designed in a matching way with the plug-in end of the connector. Therefore, the waterproof extension line is equivalent to one end of the extension line body being a plug and the other end providing a socket, the waterproof extension line can be singly used for lengthening the original power line and the like, and two or more waterproof extension lines can be sequentially connected according to the need to form a long enough extension line, so that the waterproof extension line is flexible to use.

Compared with the prior art, the waterproof sealing structure has obvious advantages and beneficial effects, and particularly, the waterproof sealing structure mainly adopts the technical scheme that the first waterproof shell and the second waterproof shell can rotate up and down relative to the connector so as to be opened or buckled and wrapped on the periphery of the connector, and meanwhile, through the arrangement of the annular sealing soft glue, the annular sealing soft glue of the first waterproof shell and the annular sealing soft glue of the second waterproof shell are in sealing contact to form a waterproof sealing cavity after the first waterproof shell and the second waterproof shell are buckled up and down, so that the waterproof sealing cavity has better waterproof performance, and the installation structure of the waterproof shell on the connector and the opening and closing structure of the waterproof shell are simpler by adopting a hinging and buckling mode, so that the waterproof sealing structure is easy to produce and manufacture. And, the quick hasp structure of integral type has quick locking and unblock advantage, and compared with the buckle spare of single cramp portion, this kind of two cramp portion structures, the buckle is more steady.

In order to more clearly illustrate the structural features and efficacy of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a first perspective view of an embodiment of the present utility model;

FIG. 2 is an exploded view of an embodiment of the present utility model;

FIG. 3 is a view showing an assembled structure of a second waterproof case according to an embodiment of the present utility model;

FIG. 4 is an exploded structural view of a second waterproof case of an embodiment of the present utility model;

FIG. 5 is an assembled structural view of a first waterproof case of an embodiment of the present utility model;

FIG. 6 is an exploded structural view of a first waterproof case of an embodiment of the present utility model;

fig. 7 is a view showing a plug of the embodiment of the present utility model connected to a plug end of a waterproof extension (waterproof case open state);

fig. 8 is a view showing the connection of a plug according to an embodiment of the present utility model to a plug end of a waterproof extension cord (waterproof case closed state);

FIG. 9 is a cross-sectional view of the structure shown in FIG. 7;

FIG. 10 is an end view of a second waterproof housing of an embodiment of the present utility model in a first state;

FIG. 11 is an end view of a second waterproof housing of an embodiment of the present utility model in a second state;

FIG. 12 is an end view of a third state of a second waterproof case of an embodiment of the present utility model;

fig. 13 to 16 are views showing the state in which the waterproof extension cord of the embodiment of the present utility model is mated with a different plug.

The attached drawings are used for identifying and describing:

the extension line body 10, the connector 20, the stop boss C, the waterproof shell 30, the first waterproof shell 31, the first inner cavity 311, the buckle slot 312, the second waterproof shell 32, the annular sealing soft glue A, the soft glue adapting sealing part A1, the second inner cavity 321, the automatic adjusting wire pressing block B, the plug 40, the buckle piece 50, the first buckle piece part 51, the second buckle piece part 52, the buckle convex part 521, the connecting part 522, the first bendable part 53, the second bendable part 54, the lengthening part 55 and the plug 60 of a wire rod needing to be prolonged.

Detailed Description

Referring to fig. 1 to 16, specific structures of embodiments of the present utility model are shown.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

The waterproof extension cord comprises an extension cord body 10, a connector 20 and a waterproof shell 30, wherein the connector 20 is connected to one end of the extension cord body 10, and the waterproof shell 30 is arranged at the position of the connector 20. The other end of the extension line body 10 is connected with a plug 40, and the plug 40 and the plug end of the connector 20 can be designed in a matching way, so that the waterproof extension line is equivalent to the extension line body 10, one end of which is a plug and the other end of which is a socket, and the waterproof extension line can be singly used for lengthening cables such as an original power line, and can be sequentially connected with two or more waterproof extension lines according to the requirement to form a long enough extension line, so that the waterproof extension line is flexible to use.

The connector 20 may be a conventional socket connector, the type of the connector is related to the type of the cable to which the waterproof extension cord is applied, and in this embodiment, the connector 20 is a power socket connector, and the plugging end is a three-hole socket. The internal structure of the connector 20 may adopt the prior art, and mainly designs the surface structure of the shell (or called shell, connector seat) of the connector 20 locally, for example: the hinge shaft position is added to enable one ends of the first waterproof shell 31 and the second waterproof shell 32 to be hinged, and the stop boss C is added to play a role in positioning the first waterproof shell 31 and the second waterproof shell 32.

The waterproof shell 30 comprises a first waterproof shell 31 and a second waterproof shell 32, wherein one ends of the first waterproof shell 31 and the second waterproof shell 32 are respectively hinged to the upper surface and the lower surface of the periphery of the connector 20, and the first waterproof shell 31 and the second waterproof shell 32 can both rotate up and down relative to the connector 20 so as to be opened or buckled and wrapped on the periphery of the connector 20; the first waterproof shell 31 has the first inner chamber 311 of opening decurrent, the second waterproof shell 32 has the second inner chamber 321 of opening decurrent, the opening part of first waterproof shell 31 and second waterproof shell 32 all is provided with annular seal flexible glue A, after the lock about both of first waterproof shell 31 and second waterproof shell 32, the annular seal flexible glue A sealing contact of both is in order to form waterproof seal chamber, the grafting end of connector 20 is located waterproof seal intracavity, and its waterproof performance is better. The convex backstop boss C that is equipped with in the week side surface of connector 20, after first waterproof shell 31 and second waterproof shell 32 lock, its respective annular seal flexible glue A card is in the orientation extension line body 10 place side of corresponding backstop boss C, is favorable to guaranteeing the stability of the mutual sealing contact location of annular seal flexible glue A of first waterproof shell 31 and second waterproof shell 32, avoids taking place relative displacement.

The first waterproof shell 31 and the second waterproof shell 32 are plastic shells, as shown in fig. 1, 6 and 9, the other ends of the first waterproof shell 31 and the second waterproof shell 32 are provided with wire outlet adapting holes, and the annular sealing soft rubber a is filled in the wire outlet adapting holes to form deformable soft rubber adapting sealing parts A1, so that the wire body of the patch cord is clamped and sealed between the soft rubber adapting sealing parts A1 of the first waterproof shell 31 and the second waterproof shell 32. The annular sealing soft rubber a may be injection molded on the corresponding first waterproof case 31 and second waterproof case 32, or the molded annular sealing soft rubber a may be assembled on the corresponding first waterproof case 31 and second waterproof case 32, which is not limited herein.

The first inner cavity 311 and/or the second inner cavity 321 are/is provided with an automatic adjusting wire pressing block B towards the other side, so that wires with different wire diameters can be pressed and positioned conveniently. Here, the automatically adjusting pressing block B is an arc-shaped piece capable of being bent up and down, which is inserted into the first inner cavity 311 and/or the second inner cavity 321, and an outer arch side of the arc-shaped piece capable of being bent up and down is used as a pressing surface. The requirement of automatically adjusting the pressing gap according to the wire rods with different diameters can be satisfied by using the up-and-down deformation of the arc-shaped sheet capable of being bent up and down. Preferably, a recess may be further provided at the outer arch side so as to position the wire body of the plug-in wire. The automatically adjusting wire pressing block B may be designed as an elastic element, for example, an elastic element (such as a pressure spring) is convexly disposed in the first inner cavity 311 and/or the second inner cavity 321 towards each other, and a wire pressing block is disposed at the top end of the elastic element, so that the upper side and/or the lower side of the wire is pressed and positioned by the wire pressing block.

Next, the snap locking structure of the waterproof case 30 will be described:

the left and right sides of the first waterproof shell 31 are provided with a fastening slot 312, the left and right sides of the second waterproof shell 32 are respectively connected with a fastening piece 50, and the fastening piece 50 is fastened in the fastening slot 312 in an openable and closable manner. The fastener 50 comprises a first buckle piece portion 51 and a second buckle piece portion 52, wherein the inner end of the first buckle piece portion 51 is connected to the left side surface or the right side surface of the corresponding second waterproof shell 32 through a first bendable portion 53, the inner end of the second buckle piece portion 52 is connected to the outer end of the first buckle piece portion 51 through a second bendable portion 54, and a buckle convex portion 521 is arranged on the inner side of the outer end of the second buckle piece portion 52; the first cleat portions 51 are attached to the left or right side of the corresponding second waterproof case 32 in a downward flipped manner, the second cleat portions 52 are attached to the left or right side of the first waterproof case 31 in an upward flipped manner, and the fastening protrusions 521 are fastened in the corresponding fastening slots 312. The fastener 50 of the embodiment is an integral quick locking structure, has the advantages of quick locking and unlocking, and is more stable in locking compared with the fastener 50 of a single fastener. The outer end of the first buckle piece 51 is further provided with an extension portion 55 extending outwards, and the extension portion 55 and the second bendable portion 54 are arranged at a left-right interval. By the arrangement of the extension 55, the fastening member 50 can be more easily pressed, so that the fastening member 50 can be stably and reliably locked to the waterproof case 30. The inner left and right spacing of second cramp portion 52 is provided with two connecting portions 522, second kink portion 54 is provided with two in order to connect respectively in the inner of two connecting portions 522, and two connecting portions 522 are connected in the outer end of first cramp portion 51 through respective second kink portion 54, extension portion 55 is located between two second kink portions 54, extension portion 55 extends towards the clearance between two connecting portions 522 and sets up, and structural design is ingenious, compact reasonable, and the setting of two connecting portions 522 compromise the required connection demand of the front and back length of second cramp portion 52, utilizes the clearance between two connecting portions 522 to set up extension portion 55 simultaneously, and the operation when extension portion 55 is convenient for lock down. Under the open state of the first waterproof shell 31 and the second waterproof shell 32, the first buckle piece portion 51 extends downwards or downwards in an outward slant or arc shape, and the second buckle piece portion 52 is in a hook-shaped structure extending downwards or downwards in an oblique or arc shape and then bending upwards, so that the first buckle piece portion 51 and the second buckle piece portion 52 can be well attached to the corresponding second waterproof shell 32 and the first waterproof shell 31.

Next, please refer to fig. 1, 7, 8 and 10 to 12, the method of using the present embodiment is described: first, as shown in fig. 1, in a state where both the first waterproof case 31 and the second waterproof case 32 are opened, a plug 60 of a wire to be extended is inserted into the insertion end of the connector 20, and after the insertion, the state is as shown in fig. 7; of course, the first waterproof case 31 and the second waterproof case 32 are turned over by the opposite angles, and the plug of the wire can be inserted into the operation space as required.

Then, the first waterproof case 31 is covered toward the second waterproof case 32, and then the fastener 50 on the second waterproof case 32 is fastened toward the first waterproof case 31, specifically: the second cleat part 52 is turned upwards to be attached to the left or right side of the first waterproof case 31, the fastening convex parts 521 are fastened in the corresponding fastening slots 312, and then the extension parts 55 are pressed downwards to turn downwards to be attached to the left or right side of the corresponding second waterproof case 32, as shown in fig. 11.

Finally, the fastened waterproof case 30 is shown in fig. 8, and the second waterproof case 32 is shown in fig. 12.

In this embodiment, the first waterproof housing 31 and the second waterproof housing 32 are hinged to the outer periphery of the connector 20, which corresponds to the size of the waterproof housing 30 being larger than the outer periphery of the connector 20, so that there is enough space in the waterproof housing 30 to match plugs of different sizes/shapes. In the drawings of the present embodiment, a three-pin plug is taken as an example, and correspondingly, the plugging end of the connector 20 is provided with a three-hole socket, and if the connector is designed as a two-pin plug or a two-hole socket, the connector can also be designed as a two-pin plug or a two-hole socket. In addition, the present embodiment is described taking a power cord as an example, and in fact, the technical scheme of the present utility model is not limited to the extension of the power cord, and may be applied to the extension lines of various wires and cables, and the corresponding plug interfaces may be changed.

The design of the utility model is mainly characterized in that the first waterproof shell 31 and the second waterproof shell 32 can rotate up and down relative to the connector 20, so that the first waterproof shell 31 and the second waterproof shell 32 are opened or buckled and wrapped on the periphery of the connector 20, meanwhile, after the first waterproof shell 31 and the second waterproof shell 32 are buckled up and down, the annular sealing soft glue A of the first waterproof shell 31 and the second waterproof shell 32 is in sealing contact with each other to form a waterproof sealing cavity, the waterproof performance is better, and in addition, the installation structure of the waterproof shell 30 on the connector 20 and the opening and closing structure of the waterproof shell 30 are simpler by adopting a hinging and buckling mode, and the waterproof sealing cavity is easy to produce and manufacture.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the technical scope of the present utility model, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present utility model are still within the scope of the technical solutions of the present utility model.

Claims (8)

1. The utility model provides a waterproof extension line, including extension line body, connector and waterproof shell, the connector is connected in the one end of extension line body, waterproof shell sets up its characterized in that to the connector place:

the waterproof shell comprises a first waterproof shell and a second waterproof shell, one ends of the first waterproof shell and the second waterproof shell are respectively hinged to the upper surface and the lower surface of the periphery of the connector, and the first waterproof shell and the second waterproof shell can both rotate up and down relative to the connector so as to be opened or buckled and wrapped on the periphery of the connector;

the first waterproof shell is provided with a first inner cavity with a downward opening, the second waterproof shell is provided with a second inner cavity with an upward opening, annular sealing soft adhesives are arranged at the openings of the first waterproof shell and the second waterproof shell, after the first waterproof shell and the second waterproof shell are buckled up and down, the annular sealing soft adhesives of the first waterproof shell and the second waterproof shell are in sealing contact with each other to form a waterproof sealing cavity, and the inserting end of the connector is positioned in the waterproof sealing cavity;

the left side surface and the right side surface of the first waterproof shell are provided with buckling groove positions, the left side surface and the right side surface of the second waterproof shell are respectively connected with buckling pieces, and the buckling pieces can be buckled in the buckling groove positions in an openable mode; the buckling piece comprises a first buckling piece part and a second buckling piece part, wherein the inner end of the first buckling piece part is connected with the left side surface or the right side surface of the corresponding second waterproof shell through a first bendable part, the inner end of the second buckling piece part is connected with the outer end of the first buckling piece part through a second bendable part, and a buckling convex part is arranged on the inner side of the outer end of the second buckling piece part;

the first cramp portion is downwards overturned and attached to the left side face or the right side face of the corresponding second waterproof shell, the second cramp portion is upwards overturned and attached to the left side face or the right side face of the first waterproof shell, and the buckling convex portion is buckled in the corresponding buckling groove.

2. The waterproof extension cord according to claim 1, wherein: the other ends of the first waterproof shell and the second waterproof shell are provided with wire outlet adapting holes, and the annular sealing soft rubber is filled in the wire outlet adapting holes to form deformable soft rubber adapting sealing parts.

3. The waterproof extension cord according to claim 1, wherein: the outer end of the first cramp part is also outwards provided with an extension part, and the extension part and the second bendable part are arranged at a left-right interval.

4. A waterproof extension as claimed in claim 3, wherein: the inner left and right spacing of second cramp portion is provided with two connecting portions, but second kink portion is provided with two in order to connect respectively in the inner of two connecting portions, but two connecting portions connect in the outer end of first cramp portion through respective second kink portion, extension portion is located between two second kink portions, extension portion extends the setting towards the clearance between two connecting portions.

5. The waterproof extension cord according to claim 3 or 4, wherein: when the first waterproof shell and the second waterproof shell are opened, the first buckle piece part is outwards and obliquely downwards or in an arc shape and downwards extends, and the second buckle piece part is in a hook-shaped structure which is obliquely downwards or in an arc shape and then upwards bends and extends.

6. The waterproof extension cord according to claim 1, wherein: the first inner cavity and/or the second inner cavity are/is convexly provided with an automatic adjusting line pressing block towards the other side.

7. The waterproof extension cord according to claim 6, wherein: the automatic regulating line pressing block is an arc-shaped piece which is inserted into the first inner cavity and/or the second inner cavity and can be bent up and down, and the outer arch side of the arc-shaped piece which can be bent up and down is used as a line pressing surface.

8. The waterproof extension cord according to claim 1, wherein: the other end of the extension line body is connected with a plug, and the plug is designed in a matching way with the plug-in end of the connector.