Power plug capable of improving yield and waterproof effect

Abstract

The utility model discloses a power plug capable of improving yield and waterproof effect. The power plug comprises a cable, a plurality of pins, a bottom shell, a cover, waterproof glue and an outer mold, wherein a plurality of core wires and a plurality of pins at one end of the cable are correspondingly connected to form a cable pin assembly, the bottom shell comprises a bottom plate and a peripheral side plate integrally connected to the periphery of the bottom plate, the peripheral side plate and the bottom plate define a containing cavity with an open upper end, and a wire passing hole with an open upper end is formed in the peripheral side plate; the bottom plate is provided with a plurality of vertically-through pin mounting holes. A vertically through glue inlet hole is formed in the cover; the cable pin assembly is assembled on the bottom shell, the pins extend into the corresponding pin mounting holes and extend out of the lower part of the bottom plate, and one end of the cable is positioned in the cable passing hole; the cover covers the top of the accommodating cavity to define a glue accommodating cavity; the waterproof glue is filled into the glue accommodating cavity from the glue inlet hole; the outer mold wraps the outer surfaces of the bottom shell and the cover in an injection molding mode. Therefore, the waterproof effect of the power plug is good, and the manufacturing yield is high.

Description

Technical Field

[0001] The utility model relates to the field of power plug manufacturing technology, in particular to a power plug with improved yield and waterproof effect. Background Art

[0002] Power plugs typically have two or three prongs. During production, these are typically injection molded onto an inner frame. This means the prongs are pre-molded onto the inner frame to create a one-piece inner frame with prongs. Then, a second injection molding process is performed on the outer portion of the one-piece inner frame to create the finished power plug. Defects during the injection molding process (e.g., incorrect prong placement, crooked prongs, or substandard inner frame appearance) can render both the prongs and the inner frame useless. Furthermore, because the inner frame is typically small, roughly horizontal, and plate-shaped, a single injection molding process on this semi-finished one-piece inner frame with prongs results in a thicker overmolding layer, which can easily lead to molding defects. These defects can cause dents, shrinkage, and deformation on the power plug's surface, rendering the entire plug useless.

[0003] Based on this, some companies use two-shot injection molding to reduce the thickness of the overmolding required for a single shot. First, a single shot of overmolding is performed on the exterior of the integrated inner frame with pins, known as the inner mold. A second shot of overmolding is then performed on the exterior of the inner mold, known as the outer mold. Compared to the single-shot injection molding method mentioned above, two-shot injection molding can reduce the molding defect rate to a certain extent. However, defects in the inner frame injection molding process can still lead to the rejection of both the pins and the inner frame. Furthermore, the overmolding thickness of the inner mold is still relatively thick, and defects during the inner mold molding process can still lead to the rejection of the inner mold, the pins, and the inner frame. Because the inner mold must have a sufficient overmolding thickness, the subsequent overmolding thickness of the outer mold can be controlled to be thinner to meet the product's appearance yield. This makes it difficult to achieve high surface geometry requirements after the inner mold is formed. As an embedded component covered by the outer mold, it is likely to negatively impact the outer mold molding process, making it difficult to meet customer orders for power plugs with high requirements for appearance precision. Moreover, the objective fact of a high defective rate is also a major challenge to the control of production costs and production efficiency.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies in the prior art, and its main purpose is to provide a power plug with improved yield and waterproof effect, which has good waterproof effect and high manufacturing yield.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A power plug with improved yield and waterproof effect, comprising a cable, a plurality of pins, a bottom shell, a cover, waterproof glue and an outer mold; wherein,

[0008] The plurality of core wires at one end of the cable are correspondingly connected to a plurality of pins to form a cable pin assembly, and the bottom shell includes a bottom plate and a peripheral side plate integrally connected to the periphery of the bottom plate, the peripheral side plate and the bottom plate form a accommodating cavity with an open upper end, the peripheral side plate is provided with a wire hole with an open upper end, and the bottom plate is provided with a plurality of pin mounting holes that pass through the top and the bottom plate; the cover is provided with a glue inlet hole that passes through the top and the bottom; the cable pin assembly is assembled on the bottom shell, the pins extend into the corresponding pin mounting holes and extend out from the bottom of the bottom plate, and one end of the cable is positioned in the wire hole; the cover is provided on the top of the accommodating cavity to enclose a glue cavity; the waterproof glue is filled into the glue cavity from the glue inlet hole; the outer mold injection molding is covered on the outer surface of the bottom shell and the cover.

[0009] As a preferred solution, the waterproof glue fills the glue cavity.

[0010] As a preferred solution, the cover is provided with a plurality of process holes directly facing the pins.

[0011] As a preferred solution, a plurality of card slots are provided on the outer peripheral side of the peripheral side plate, and card protrusions are provided in the card slots. A plurality of card buckle arms are provided at intervals on the bottom surface of the cover, and card buckle holes are provided on the card buckle arms. When the cover is assembled on the top of the bottom shell, the card buckle arms extend into the corresponding card slots, and the card protrusions are squeezed into the card holes to lock the card buckle arms.

[0012] As a preferred solution, the inner wall surface of the peripheral side plate is provided with a plurality of positioning grooves, and the bottom surface of the cover is provided with a plurality of positioning blocks at intervals. When the cover is assembled on the top of the bottom shell, the positioning blocks extend into the corresponding positioning grooves.

[0013] As a preferred solution, the hole wall surface of the wire passing hole is further recessed with a first sealing ring half groove, and accordingly, an extension arm extends downward from the bottom surface of the cover, and the bottom of the extension arm is recessed with an adaptation groove upward, and the groove wall surface of the adaptation groove is further recessed with a second sealing ring half groove; a sealing ring is sleeved on the cable; when the cover is assembled on the top of the bottom shell, the extension arm extends downward into the wire passing hole, the adaptation groove matches the wire passing hole, the second sealing ring half groove matches the first sealing ring half groove, and the sealing ring is positioned by the second sealing ring half groove and the first sealing ring half groove.

[0014] As a preferred solution, vertical guide grooves are provided on both sides of the extension arm, and vertical guide strips are provided on the inner wall surfaces on two opposite sides of the peripheral side plates corresponding to the wire holes. When the cover is assembled on the top of the bottom shell, the vertical guide grooves correspond to the vertical guide strips, and the vertical guide strips are embedded in the vertical guide grooves, so that the vertical guide grooves are embedded downward along the vertical guide strips.

[0015] As a preferred solution, the front end of the outer mold is provided with extraction operation recesses on the left and right sides, and corresponding stop portions are formed.

[0016] As a preferred solution, the bottom shell and the cover are made of hard plastic, and the outer mold is made of soft plastic.

[0017] As a preferred solution, the wall thickness of the outer mold accounts for 4-6% of the outer left and right width of the power plug, and the wall thickness of the peripheral side plate accounts for 9-12% of the outer left and right width of the power plug.

[0018] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it mainly installs the wired pins on the bottom shell, covers the cover, and then adds waterproof glue towards the accommodating cavity between the bottom shell and the cover, so that the bottom shell, the cover and the cable pin assembly form a waterproof and sealed module. At the same time, the geometric stability of the main structure of the power plug is controlled, and the subsequent re-molding of the outer mold can easily ensure that the thickness of each part of the outer mold remains basically consistent, and negative factors such as surface deformation and shrinkage can be controlled, which is conducive to improving the molding efficiency and yield of the outer mold; and, the early processes of making and assembling the bottom shell and the cover, adding waterproof glue, etc. are feasible and easy to control, with a high yield, and rarely produce defective products. Therefore, by adopting this manufacturing process, the power plug has a good waterproof effect, a high yield of finished products, and is also conducive to improving production efficiency.

[0019] In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a perspective view of a power plug according to an embodiment of the present utility model;

[0021] Figure 2 is another perspective view of the power plug according to the embodiment of the present invention;

[0022] Figure 3 This is an exploded view of a power plug according to an embodiment of the present invention;

[0023] Figure 4This is another exploded view of the power plug according to the embodiment of the present invention;

[0024] Figure 5 This is a diagram illustrating the steps of injection molding the bottom shell of the power plug according to an embodiment of the present utility model;

[0025] Figure 6 This is a diagram illustrating the steps of installing the cable pin assembly of the power plug according to an embodiment of the present utility model;

[0026] Figure 7 This is a diagram illustrating the steps of installing a cover on a power plug according to an embodiment of the present utility model (also showing the bottom structure of the cover);

[0027] Figure 8 This is a three-dimensional diagram of the main structure of the power plug according to an embodiment of the present utility model;

[0028] Figure 9 This is another perspective view of the main structure of the power plug according to an embodiment of the present utility model;

[0029] Figure 10 is a cross-sectional view of the main structure of the power plug according to an embodiment of the present utility model;

[0030] Figure 11 This is a diagram illustrating the steps of manufacturing a power plug according to an embodiment of the present utility model;

[0031] Figure 12 This is a comparative diagram of the dimensions of the base shell, cover, and outer mold of the power plug according to an embodiment of the present utility model.

[0032] Explanation of the accompanying symbols: cable 1, wire tail buckle 11, sealing ring 12, pin 2, bottom shell 3, bottom plate 31, peripheral side plate 32, wire hole 33, vertical guide bar 331, accommodating chamber 34, pin mounting hole 35, card slot 36, card protrusion 37, positioning groove 38, first sealing ring half groove 39, step surface 301, imitation recess 302, imitation stop portion 303, cover 4, glue inlet hole 41, process hole 42, card buckle arm 43, buckle hole 44, positioning block 45, extension arm 46, vertical guide groove 461, adaptation groove 47, second sealing ring half groove 48, outer mold 5, extraction operation recess 51, stop portion 52. DETAILED DESCRIPTION

[0033] Please refer to Figures 1 to 12In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0034] The cover is provided with a plurality of holes for passing the wires through the bottom plate, and the cover is provided with a plurality of holes for passing the wires through the bottom plate. ... The outer mold injection molding is coated on the outer surfaces of the bottom shell and the cover.

[0035] The steps for manufacturing a power plug with improved yield and waterproof effect include the following steps:

[0036] Step 1: Prepare a cable 1, several pins 2, a bottom shell 3, and a cover 4; wherein, several core wires at one end of the cable 1 are connected to several pins 2 to form a cable 1 pin 2 assembly, for example, by riveting to form an electrical connection. The bottom shell 3 is an injection molded part, which is formed by injection molding. The bottom shell 3 includes a bottom plate 31 and a peripheral side plate 32 integrally connected to the entire periphery of the bottom plate 31. The peripheral side plate 32 and the bottom plate 31 form a receiving cavity 34 with an open upper end. The peripheral side plate 32 is provided with an upper end. The bottom plate 31 is provided with a plurality of vertically extending pin mounting holes 35 and an open wire hole 33. The cover 4 is also an injection-molded part, which is usually shaped like the upper end of the accommodating cavity 34 and slightly larger in size. The cover 4 is provided with a vertically extending glue inlet hole 41. The bottom shell 3 and the cover 4 can be made of PA66 plastic or other plastics. PA66 plastic has a high melting point and is a semi-crystalline-crystalline material. PA66 plastic can maintain strong strength and rigidity even at higher temperatures.

[0037] Step 2: Install the cable 1 and pin 2 assembly; Assemble the cable 1 and pin 2 assembly on the bottom shell 3, with the pins 2 extending into the corresponding pin mounting holes 35 and extending out from under the bottom plate 31. One end of the cable 1 is positioned in the wire hole 33, and the other end is located outside the bottom shell 3.

[0038] Step 3: Install the cover 4; Place the cover 4 on the top of the accommodating cavity 34 to form a relatively closed glue accommodating cavity;

[0039] Step 4: Add waterproof glue; fill the glue cavity with waterproof glue from the glue inlet hole 41 until the glue cavity is completely filled with waterproof glue; wait for the waterproof glue to solidify; the filling of waterproof glue, in addition to providing a waterproof seal, also solidifies the pin 2 and the connection part of the pin 2, so that the connection between the components is stable and will not loosen. Moreover, the waterproof glue is filled inside the bottom shell 3 and the cover 4, which plays a dimensional shaping role for the assembly formed by the bottom shell 3 and the cover 4, which is beneficial to the geometric stability of the assembly. This is because the geometric stability of the assembly is also related to the molding efficiency and yield of the outer mold. At this stage, the main structure of the power plug is obtained, and its shape and size are relatively close to the finished product.

[0040] Step five, forming the outer mold 5; injection molding the outer mold 5 to fully cover the outer surface of the bottom shell 3 and the cover 4, and to form a small section of the cable 1 near the peripheral side plate 32 to cover it as the wire tail buckle 11. The outer mold 5 is made of TPV soft rubber. Usually, the bottom shell 3 and the cover 4 have formed a semi-finished product of a larger size and basically imitate the shape of the finished product. When the outer mold 5 is injection molded, the thickness of each part of the outer mold 5 can be kept basically consistent, and negative factors such as surface deformation and shrinkage can be alleviated and controlled, further improving the molding efficiency and yield of the outer mold 5. At this point, the power plug obtained has a good waterproof effect, is easy to automate, and has a high yield of finished products. In this embodiment, the bottom shell 3, the cover 4, and the outer mold 5 all have a triangular structure.

[0041] In one case, in step 2, the pin 2 is inserted into place. During insertion, the pin 2 can be manually placed into the corresponding pin installation hole 35, and then a semi-automatic or fully automatic machine presses down the top of the pin 2. Of course, in some cases, the top of the pin 2 can also be pressed down manually using a tool or a finger-assisted jig.

[0042] In another scenario, in step 2, the pins 2 are pre-installed, simplifying the pre-installation process. Furthermore, in step 3, the pins 2 are pressed down a second time while the cover 4 is pressed down to assemble, ensuring that the pins 2 are properly inserted. This cleverly utilizes the single step of installing the cover 4 to achieve multiple functions: installing the cover and pressing the pins 2 (or, in other words, the step of reinforcing the insertion of the pins 2). In a specific implementation, for example, the lid 4 is provided with vertically extending process holes 42 corresponding to each pin 2. In this embodiment, there are three pins 2 arranged in a triangular pattern. Therefore, the process holes 42 are also arranged in a triangular pattern. Three ejector pins of a robot or auxiliary fixture extend into the three process holes 42. When the lid 4 is grasped and assembled onto the bottom shell 3, the three ejector pins simultaneously extend into the accommodating cavity 34 and abut the tops of the corresponding pins 2 (in this embodiment, the pins 2 are cylindrical and have recessed holes reserved at their tops). Therefore, when the lid 4 is pressed downward, the three ejector pins simultaneously press down on the pins 2, thereby pressing down on the pins 2. Limiting steps are provided on the three ejector pins, which form a limit with the top surface of the lid 4 to control the depth of the ejector pins' downward extension relative to the lid 4. The ejector pins can be rigid or elastic.

[0043] The outer peripheral side of the peripheral side plate 32 of the bottom shell 3 is provided with a plurality of card slots 36, and the card slots 36 pass through the top of the peripheral side plate 32 but do not pass through the inner wall surface of the peripheral side plate 32, so as to avoid affecting the airtightness of the peripheral side plate 32 due to the setting of the card slots 36. A card protrusion 37 is provided in the card slot 36. Usually, the card protrusion 37 has an inclined surface that gradually decreases from top to bottom, so that the entire card protrusion 37 is in the shape of an oblique cone with a small top and a large bottom, which is convenient for the cover 4 to be assembled and positioned from top to bottom. The latching protrusion 37 is hidden in the latching groove 36 and does not protrude from the outer wall of the peripheral side plate 32. A plurality of latching arms 43 are provided at circumferential intervals near the peripheral edge of the bottom surface of the cover 4. The latching arms 43 are provided with buckle holes 44 that pass through the latching arms 43 horizontally. When the cover 4 is assembled on the top of the bottom shell 3 from top to bottom, the latching arms 43 extend into the corresponding latching groove 36, and the latching protrusion 37 is squeezed into the buckle hole 44 to lock the latching arms 43. The inner wall surface of the peripheral side plate 32 is provided with a plurality of positioning grooves 38, and the positioning grooves 38 pass through the top of the peripheral side plate 32 upward. The positioning grooves 38 do not pass through the outer wall surface of the peripheral side plate 32 to avoid affecting the airtightness of the peripheral side plate 32 due to the setting of the positioning grooves 38. The bottom surface of the cover 4 is provided with a plurality of positioning blocks 45 at intervals. When the cover 4 is assembled on the top of the bottom shell 3 from top to bottom, the positioning blocks 45 extend into the corresponding positioning grooves 38. The hole wall surface of the wire hole 33 is further recessed with a first sealing ring half groove 39, and accordingly, an extension arm 46 extends downward from the bottom surface of the cover 4, and an adapting groove 47 is recessed upward at the bottom of the extension arm 46, and a second sealing ring half groove 48 is further recessed on the groove wall surface of the adapting groove 47; a sealing ring 12 is sleeved on the cable 1; when the cover 4 is assembled from top to bottom on the top of the bottom shell 3, the extension arm 46 extends downward into the wire hole 33, the adapting groove 47 matches the wire hole 33, and the second sealing ring half groove 48 is matched with the second sealing ring half groove 48. 8 matches and fits with the first sealing ring half groove 39 to form a circular ring shape, and the sealing ring is positioned by the second sealing ring half groove 48 and the first sealing ring half groove 39, that is, the lower half of the sealing ring is located in the first sealing ring half groove 39, and the upper half of the sealing ring is located in the second sealing ring half groove 48. The second sealing ring half groove 48 and the first sealing ring half groove 39 squeeze the sealing ring 12, so that the sealing ring 12 forms a sealing position between the peripheral side plate 32, the cover 4 and the cable 1.Vertical guide grooves 461 are provided on both sides of the extension arm 46, and vertical guide bars 331 are provided on the inner wall surfaces on the two opposite sides of the peripheral side plate 32 corresponding to the wire hole 33. When the cover 4 is assembled on the top of the bottom shell 3 from top to bottom, the vertical guide grooves 461 correspond to the vertical guide bars 331, and the vertical guide bars 331 are embedded in the vertical guide grooves 461, so that the vertical guide grooves 461 are embedded downward along the vertical guide bars 331 until the lower end of the extension arm 46 rests on the step surface 301 of the bottom shell 3.

[0044] The glue inlet 41 is located within the area surrounded by the three process holes 42. Typically, after the waterproof glue is applied and cured, the glue in the glue inlet 41 and the three process holes 42 does not protrude from the surface of the lid 4, but is slightly lower than the surface of the lid 4. Furthermore, during the molding of the outer mold 5, the gaps in the slots 36 are filled, as are the recessed areas at the top of the glue inlet 41 and the three process holes 42. This creates multiple glue-engaging areas between the outer mold 5, the bottom shell 3, and the lid 4. Typically, the three slots 36 are evenly or approximately evenly spaced around the perimeter of the side panels 32, ensuring a more balanced bond between the outer mold 5 and the bottom shell 3. Typically, the bottom shell 3 and the lid 4 are made of hard plastic, either the same material or different materials. Hard plastic is preferred to ensure stable geometric dimensions, good controllability, and ideal dimensional accuracy for the main structure. The outer mold 5 is preferably made of soft plastic. It primarily serves to encapsulate the exterior, contributing to various aspects such as appearance, tactile feel, and waterproofing. Thanks to the ingenious structural design, the walls of the bottom shell 3, lid 4, and outer mold 5 do not need to be too thick, avoiding shrinkage and deformation caused by excessive thickness. For example, the wall thickness of the outer mold 5 accounts for 4-6% of the outer left-right width of the power plug, and the wall thickness of the peripheral side panels 32 accounts for 9-12% of the outer left-right width of the power plug. Because the bottom shell 3 and lid 4 are injection molded first, and then the connected pins 2 are installed into the bottom shell 3, the wiring, bottom shell 3, and lid 4 can be produced in parallel without waiting. Moreover, the cable 1, the plurality of pins 2, bottom shell 3, and lid 4 are all guaranteed to be good products. In traditional technology, if the pins 2 are pre-injected onto the inner frame, any defects in the injection molding process of the inner frame will cause the pins 2 and the inner frame to be scrapped. In the present invention, after the lid 4 is installed, the semi-finished product at this stage is easy to control the yield rate, and is basically good, with few defective products. The bottom shell 3 and the lid 4 are formed separately. The bottom shell 3 is a hollow cavity, which means that the wall thickness of the bottom shell 3 and the lid 4 will not be too thick. They can be controlled to an appropriate thickness, which easily takes into account the strength requirements and the molding yield requirements. There will be no defects such as surface depression or obvious shrinkage caused by the injection molding wall being too thick. The shape determined by the assembly of the lid 4 and the bottom shell 3 has stable geometric dimensions. Based on the semi-finished product at this stage, the outer mold 5 is then formed. The thickness of the outer mold 5 does not need to be too thick, and it can meet the requirements of stable covering use. It is easy to ensure that the thickness of each part of the outer mold 5 remains basically consistent. Negative factors such as surface deformation and shrinkage can be controlled, which is conducive to improving the molding efficiency and yield of the outer mold 5. Therefore, using this manufacturing process, the power plug has a good waterproof effect and a high finished product yield.

[0045] Furthermore, the front left and right sides of the outer mold 5 are provided with extraction operation recesses 51. These recesses 51 are located in the lower section, and corresponding stoppers 52 are formed in the upper section. To unplug the power plug, two fingers are positioned in the left and right extraction operation recesses 51, respectively, and force is applied to the corresponding stoppers 52. Pulling upwards, the power plug is easily unplugged, reducing the difficulty of operation. Because the outer mold 5 is designed with a uniform or substantially uniform wall thickness, contoured recesses 302 are provided in the lower section of the peripheral side panels 32 of the bottom shell 3, and a simulated stopper 303 is provided in the upper section of the peripheral side panels 32. The stoppers 52 cover the outer surface of the simulated stopper 303.

[0046] The design focus of the present invention is that it mainly installs the wired pins on the bottom shell, covers the lid, and then adds waterproof glue toward the accommodating cavity between the bottom shell and the lid through the arrangement of cables, several pins, a bottom shell, a cover, waterproof glue and an outer mold, so that the bottom shell, the cover and the cable pin assembly form a waterproof and sealed module. At the same time, the geometric stability of the main structure of the power plug is controlled, and the subsequent re-molding of the outer mold can easily ensure that the thickness of each part of the outer mold remains basically consistent, and negative factors such as surface deformation and shrinkage can be controlled, which is conducive to improving the molding efficiency and yield of the outer mold; moreover, the early processes of making and assembling the bottom shell and the cover, adding waterproof glue, etc. are feasible and easy to control, with a high yield, and defective products rarely appear. Therefore, by adopting this manufacturing process, the power plug has a good waterproof effect, a high yield of finished products, and is also conducive to improving production efficiency.

[0047] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A power plug with improved yield and waterproof effect, characterized in that: It includes cables, several pins, bottom shell, cover, waterproof glue and outer mold; among them, The plurality of core wires at one end of the cable are correspondingly connected to a plurality of pins to form a cable pin assembly, and the bottom shell includes a bottom plate and a peripheral side plate integrally connected to the periphery of the bottom plate, the peripheral side plate and the bottom plate form a accommodating cavity with an open upper end, the peripheral side plate is provided with a wire hole with an open upper end, and the bottom plate is provided with a plurality of pin mounting holes that pass through the top and the bottom plate; the cover is provided with a glue inlet hole that passes through the top and the bottom; the cable pin assembly is assembled on the bottom shell, the pins extend into the corresponding pin mounting holes and extend out from the bottom of the bottom plate, and one end of the cable is positioned in the wire hole; the cover is provided on the top of the accommodating cavity to enclose a glue cavity; the waterproof glue is filled into the glue cavity from the glue inlet hole; the outer mold injection molding is covered on the outer surface of the bottom shell and the cover.

2. A power plug with improved yield and waterproof effect according to claim 1, characterized in that: The waterproof glue fills the glue cavity.

3. The power plug with improved yield and waterproof effect according to claim 1, characterized in that: The cover is provided with a plurality of process holes directly facing the pins.

4. A power plug with improved yield and waterproof effect according to claim 1, characterized in that: The outer peripheral side of the peripheral side plate is provided with a plurality of card slots, and the card slots are provided with card protrusions. The bottom surface of the cover is provided with a plurality of card buckle arms at intervals, and the card buckle arms are provided with button holes. When the cover is assembled on the top of the bottom shell, the card buckle arms extend into the corresponding card slots, and the card protrusions are squeezed into the button holes to lock the card buckle arms.

5. A power plug with improved yield and waterproof effect according to claim 1 or 4, characterized in that: The inner wall surface of the peripheral side plate is provided with a plurality of positioning grooves, and the bottom surface of the cover is provided with a plurality of positioning blocks at intervals. When the cover is assembled on the top of the bottom shell, the positioning blocks extend into the corresponding positioning grooves.

6. The power plug with improved yield and waterproof effect according to claim 1, characterized in that: The hole wall surface of the wire passing hole is further recessed with a first sealing ring half groove, and accordingly, an extension arm extends downward from the bottom surface of the cover, and an adaptation groove is recessed upward at the bottom of the extension arm, and a second sealing ring half groove is further recessed on the groove wall surface of the adaptation groove; a sealing ring is sleeved on the cable; when the cover is assembled on the top of the bottom shell, the extension arm extends downward into the wire passing hole, the adaptation groove matches the wire passing hole, the second sealing ring half groove matches the first sealing ring half groove, and the sealing ring is positioned by the second sealing ring half groove and the first sealing ring half groove.

7. A power plug with improved yield and waterproof effect according to claim 6, characterized in that: Vertical guide grooves are provided on both sides of the extension arm, and vertical guide bars are provided on the inner wall surfaces on the two opposite sides of the peripheral side plate corresponding to the wire passing holes. When the cover is assembled on the top of the bottom shell, the vertical guide grooves correspond to the vertical guide bars, and the vertical guide bars are embedded in the vertical guide grooves, so that the vertical guide grooves are embedded downward along the vertical guide bars.

8. The power plug with improved yield and waterproof effect according to claim 1, characterized in that: The front end of the outer mold is provided with extraction operation recesses on the left and right sides, and corresponding stoppers are formed.

9. The power plug with improved yield and waterproof effect according to claim 1, characterized in that: The bottom shell and the cover are made of hard plastic, and the outer mold is made of soft plastic.

10. A power plug with improved yield and waterproof effect according to claim 1 or 9, characterized in that: The wall thickness of the outer mold accounts for 4-6% of the outer left-right width of the power plug, and the wall thickness of the peripheral side plate accounts for 9-12% of the outer left-right width of the power plug.

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