Plug and plug pin
By designing a multi-part structure for the plug pins and combining it with an embedded injection-molded plug cover, the problems of heat shrink tubing falling off and pins detaching are solved, achieving stable connection and short-circuit prevention of the plug.
Patent Information
- Application Number
- CN202422773399.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-11-14
AI Technical Summary
In existing plugs, the heat shrink tubing may fall off, exposing the solder joints and causing short circuits. In addition, the plug pins may be easily separated from the plug cover and damaged by external forces.
The plug pins are designed to be connected in sequence as a first part, a second part and a third part. The first part is provided with a threading hole and a protrusion structure, and the second part is provided with a fixing hole and a notch. The plug cover is combined with the second part by embedded injection molding. The protrusion structure prevents the heat shrink tubing from falling off, and the fixing hole and the notch prevent the plug pins from detaching from the cover.
It effectively prevents the heat shrink tubing from falling off, increases the stability of the connection between the plug pins and the cover, and avoids short circuits and pin detachment damage.
Smart Images
Figure CN223471773U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a plug and plug pin. BACKGROUND
[0002] In the existing plug, the plug pin is welded with the wire core, and the welding position is protected by a heat shrink sleeve. However, during assembly or use, the heat shrink sleeve can fall off, so that the plug pin or the wire core at the welding position is exposed and is easy to cause short circuit with other electronic parts in the plug, thereby causing high voltage failure. Furthermore, the existing plug pin is mostly embedded in the plug cover plate, and then the plug cover plate and the plug body are assembled. However, the existing plug pin can be separated from the plug cover plate under the influence of external force, thereby causing damage. SUMMARY
[0003] To solve the foregoing technical problem, the utility model provides a plug, which comprises a plug pin, a plug cover plate, a wire and a heat shrink sleeve. The plug pin comprises a first part, a second part and a third part connected in sequence. The first part is internally provided with a threading hole and is provided with a protruding structure on each side. The second part is internally provided with a fixing hole and is provided with a notch on each side. The third part is used for being inserted into a socket. The plug cover plate is combined with the second part in a way of buried injection molding. The fixing hole and the two notches of the second part are used for preventing the plug pin from being separated from the plug cover plate. The wire comprises a wire core. The wire core passes through the threading hole of the first part and is hooked and welded on the first part. The heat shrink sleeve covers the first part and the wire core. The two protruding structures of the first part are used for preventing the heat shrink sleeve from falling off.
[0004] In an embodiment, each protruding structure has a plurality of protrusions.
[0005] In an embodiment, the plurality of protrusions of the two protruding structures are left-right symmetrical or staggered with each other.
[0006] In an embodiment, the cross-sectional shape of the protrusion is triangular or barbed.
[0007] In an embodiment, the plug cover plate has a first protruding block matched with the fixing hole, and two second protruding blocks matched with the two notches.
[0008] In an embodiment, the surface of the second part close to the first part is flush with the surface of the plug cover plate close to the first part, or is buried in the plug cover plate.
[0009] The utility model also provides a plug pin, which comprises a first part, a second part and a third part connected in sequence, the first part is internally provided with a threading hole and is provided with a protruding structure on each side, the second part is internally provided with a fixing hole and is provided with a notch on each side, and the third part is used for being inserted into a socket.
[0010] In one embodiment, each protruding structure has a plurality of protrusions.
[0011] In one embodiment, the plurality of protrusions of the two protruding structures are left-right symmetrical or staggered with each other.
[0012] In one embodiment, the cross-sectional shape of the protrusions is triangular or barbed. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 is a schematic view of a partial structure of the plug of the present application.
[0014] Figure 2 is a sectional view of a partial structure of the plug of the present application. Figure 1
[0015] Figure 3 is a schematic view of a partial structure of the plug of the present application after removing the plug cover plate and the heat shrink sleeve. Figure 1
[0016] Figure 4 is a schematic view of a plug pin of the present application.
[0017] Figure 5 is a schematic view of another plug pin of the present application.
[0018] Figure 6 is a schematic view of yet another plug pin of the present application.
[0019] Figure 7 is a schematic view of still another plug pin of the present application.
[0020] Figure 8 is a sectional view of a partial structure of another plug of the present application. DETAILED DESCRIPTION
[0021] Referring to Figure 4 , the present application provides a plug pin 1 comprising a first portion 11, a second portion 12 and a third portion 13 connected in sequence. Referring to Figure 3 , the first portion 11 is used for hook welding with a wire core 31. Referring to Figure 2 , the second portion 12 is used for combining with a plug cover plate 2. The third portion 13 is used for insertion into a socket.
[0022] Referring to Figure 4 , the first portion 11 of the plug pin 1 is internally provided with a threading hole 111, and each side is provided with a protruding structure 112. Referring to Figure 3 , the threading hole 111 is used for allowing the wire core 31 to pass through the first portion 11, so that the wire core 31 can be hook welded on the first portion 11. Referring to Figure 2 The protruding structures 112 are used to give the heat-shrinkable sleeve 4 a reaction force in a direction opposite to the direction in which the heat-shrinkable sleeve 4 is intended to be detached, thereby effectively preventing the heat-shrinkable sleeve 4 from being detached.
[0023] Please refer to Figure 4 Each of the protruding structures 112 has a plurality of protrusions 1121. Please refer to Figures 2 to 4 In this embodiment, the plurality of protrusions 1121 of the two protruding structures 112 are left-right symmetrical, and the cross-sectional shape of the protrusions 1121 is triangular. Please refer to Figure 5 In another embodiment, the plurality of protrusions 1121 of the two protruding structures 112 are staggered with each other, and the cross-sectional shape of the protrusions 1121 is triangular. Please refer to Figure 6 In yet another embodiment, the plurality of protrusions 1121 of the two protruding structures 112 are left-right symmetrical, and the cross-sectional shape of the protrusions 1121 is barbed. Please refer to Figure 7 In still another embodiment, the plurality of protrusions 1121 of the two protruding structures 112 are staggered with each other, and the cross-sectional shape of the protrusions 1121 is barbed. That is, the plurality of protrusions 1121 of the two protruding structures 112 can be left-right symmetrical or staggered with each other, and the cross-sectional shape of the protrusions 1121 can be triangular or barbed, but is not limited thereto. The plurality of protrusions 1121 of the two protruding structures 112 can also be distributed in other ways, the cross-sectional shape of the protrusions 1121 can also be other regular or irregular shapes, and the size of the protrusions 1121 is not limited, as long as it can effectively prevent the heat-shrinkable sleeve 4 from being detached.
[0024] In addition, please refer to Figure 4 and Figure 5 Each of the protruding structures 112 has 4 protrusions 1121; please refer to Figure 6 and Figure 7 Each of the protruding structures 112 has 2 protrusions 1121; but is not limited thereto, each of the protruding structures 112 can also have other numbers of protrusions 1121, such as 3, 5, etc., as long as it can effectively prevent the heat-shrinkable sleeve 4 from being detached. In other embodiments, each of the protruding structures 112 can also have only 1 protrusion 1121.
[0025] Please refer to Figure 1 and Figure 2 The second part 12 of the plug pin 1 is used to be combined with the plug cover plate 2 in a way of embedded injection molding. Please refer to Figure 4 The second part 12 is internally provided with a fixing hole 121, and is provided with a notch 122 on each side. Please refer to Figure 2When the insert injection molding is performed, the material of the plug cover plate 2 surrounds the second part 12 of the plug pin 1 and fills the fixing hole 121 and the two notches 122, and then solidifies into the plug cover plate 2 with the first protrusion 21 and the two second protrusions 22. The first protrusion 21 is completely matched with the fixing hole 121, and the two second protrusions 22 are completely matched with the two notches 122. The fixing hole 121 and the two notches 122 are used to prevent the plug pin 1 from moving in the direction perpendicular to the plug cover plate 2, so as to avoid the plug pin 1 from being separated from the plug cover plate 2, thereby increasing the stability of the combination of the plug pin 1 and the plug cover plate 2.
[0026] Referring to Figure 1 The utility model also provides a plug which comprises the plug pin 1, the plug cover plate 2, the electric wire 3 and the heat shrink sleeve 4 in any one of the preceding embodiments. Referring to Figure 4 The plug pin 1 comprises the first part 11, the second part 12 and the third part 13 which are sequentially connected. The first part 11 is internally provided with a threading hole 111 and is provided with a protrusion structure 112 on each side. Referring to Figure 3 The electric wire 3 comprises the electric wire core 31, and the electric wire core 31 passes through the threading hole 111 of the first part 11 and is hooked to the first part 11, which can avoid the electric wire core 31 from being separated from the plug pin 1 under the action of external force. Specifically, referring to Figure 2 The electric wire 3 comprises the electric wire core 31 and the insulating layer 32 covering the electric wire core 31, and another part of the electric wire core 31 not covered by the insulating layer 32 passes through the threading hole 111 of the first part 11 and is hooked to the first part 11.
[0027] Referring to Figure 2 The heat shrink sleeve 4 covers the first part 11 and the electric wire core 31, and the two protrusion structures 112 of the first part 11 are used to prevent the heat shrink sleeve 4 from falling off. Specifically, the heat shrink sleeve 4 is first sleeved on the electric wire 3 from above, then moves downward to cover the first part 11 and the electric wire core 31, and then is heated by a hot air gun to shrink the heat shrink sleeve 4, so that the two protrusion structures 112 are embedded in the heat shrink sleeve 4, so that the two protrusion structures 112 can give the heat shrink sleeve 4 enough reaction force in the direction opposite to the direction in which the heat shrink sleeve 4 wants to fall off, thereby effectively preventing the heat shrink sleeve 4 from falling off.
[0028] Referring to Figure 2 The second part 12 is internally provided with the fixing hole 121 and is provided with a notch 122 on each side. The plug cover plate 2 is combined with the second part 12 in the manner of insert injection molding, and the fixing hole 121 and the two notches 122 of the second part 12 are used to prevent the plug pin 1 from being separated from the plug cover plate 2. The third part 13 is used to be inserted into the socket.
[0029] Referring to Figures 4 to 7The plurality of protrusions 1121 of the two protrusion structures 112 can be symmetrical or staggered with each other, and the cross-sectional shape of the protrusions 1121 can be triangular or barbed, but is not limited thereto, as long as the heat shrink sleeve 4 can be effectively prevented from falling off. In other embodiments, each protrusion structure 112 can also have only one protrusion 1121.
[0030] Referring to Figure 2 In the process of combining the plug cover plate 2 with the second part 12 by means of embedded injection molding, the material of the plug cover plate 2 will surround the second part 12 of the plug pin 1 and fill the fixing hole 121 and the two notches 122, and then solidify into the plug cover plate 2 with the first protrusion 21 and the two second protrusions 22. That is, the plug cover plate 2 has the first protrusion 21 matched with the fixing hole 121, and the two second protrusions 22 matched with the two notches 122. The fixing hole 121 and the two notches 122 are used to prevent the plug pin 1 from moving in a direction perpendicular to the plug cover plate 2, so as to avoid the plug pin 1 from being separated from the plug cover plate 2, thereby increasing the stability of the combination of the plug pin 1 and the plug cover plate 2.
[0031] Referring to Figure 1 and Figure 2 In this embodiment, the surface 123 of the second part 12 close to the first part 11 is flush with the surface 23 of the plug cover plate 2 close to the first part 11, that is, the surface 123 of the second part 12 is not embedded in the plug cover plate 2. Referring to Figure 8 In another embodiment, the surface 123 of the second part 12 is embedded in the plug cover plate 2, that is, a part of the first part 11 close to the second part 12 is also embedded in the plug cover plate 2, so as to further increase the stability of the combination of the plug pin 1 and the plug cover plate 2.
[0032] The above various embodiments are exemplary embodiments of the present application, which are only used to explain the technical scheme of the present application, and are not used to limit the protection scope of the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can modify the technical scheme in the above exemplary embodiments, or make equivalent replacement to part of the technical features within the protection scope of the present application; and these modifications or equivalent replacements should be considered to fall within the protection scope of the present application.
Claims
1. A plug comprising: a plug pin comprising a first portion, a second portion and a third portion connected in sequence, the first portion having a threading hole in the interior and a protrusion structure on each side, the second portion having a fixing hole in the interior and a notch on each side, and the third portion being used for insertion into a socket; a plug cover plate combined with the second portion in a way of insert injection molding, the fixing hole and the two notches of the second portion being used for preventing the plug pin from being separated from the plug cover plate; a wire comprising a wire core, the wire core passing through the threading hole of the first portion and being crimped on the first portion; and a heat shrinkable sleeve covering the first portion and the wire core, the two protrusion structures of the first portion being used for preventing the heat shrinkable sleeve from falling off. Each of the protrusion structures has a plurality of protrusions.
2. The plug of claim 1, wherein: The plurality of protrusions of the two protrusion structures are left-right symmetrical or staggered with each other.
3. The plug of claim 2, wherein: The protrusions have a cross-sectional shape of triangle or barb.
4. The plug of claim 2, wherein: The plug cover plate has a first protrusion matched with the fixing hole and two second protrusions matched with the two notches.
5. The plug of claim 1, wherein: The surface of the second portion close to the first portion is flush with the surface of the plug cover plate close to the first portion, or is embedded in the plug cover plate.
6. The plug of claim 1, wherein:
7. A plug pin comprising a first portion, a second portion and a third portion connected in sequence, the first portion having a threading hole in the interior and a protrusion structure on each side, the second portion having a fixing hole in the interior and a notch on each side, and the third portion being used for insertion into a socket. Each of the protrusion structures has a plurality of protrusions.
8. The plug prong of claim 7, wherein: The plurality of protrusions of the two protrusion structures are left-right symmetrical or staggered with each other.
9. The plug prong of claim 8, wherein: The protrusions have a cross-sectional shape of triangle or barb.
10. The plug prong of claim 8, wherein: