Adapter of notebook computer power adapter

Abstract

The invention provides an adapter of a notebook computer power adapter, which comprises a fixed shell, a rotating hub, a hub seat, a triangular concave part, a triangular rib, a plug cover plate, a convex drum, a rectangular hole, a circular truncated cone opening, a handle, a double-spring piece, an arc column rib, a blocking rib, a sliding chute, a sliding rail, a spring piece bayonet, a fork-shaped spring piece, an arc-shaped elastic piece, a gap, a pointer, a positioning block, a positioning mark and a positioning groove, the rotating hub, the hand pinching part, the double-spring piece, the blocking rib, the sliding groove and the sliding rail form a variable mechanism, the triangular concave part, the triangular rib, the pointer and the positioning mark form a positioning mechanism, the null line pin, the live wire pin and the ground wire pin are variable plugs, the sliding rail is arranged on the upper portion of an inner cavity of the fixing shell, and when the converter is connected with a wall power panel, the number of the pins of the converter can be changed. The power adapter can be inserted into a two-hole power supply panel and a three-hole power supply panel, and when the power adapter is connected with a laptop power adapter, the power adapter can be used for a two-core pin power supply adapter and a three-core socket power supply adapter.

Description

Technical Field

[0001] The present invention relates to a power socket converter for a laptop computer, and more particularly to an adapter for a laptop computer power adapter, belonging to the technical field of computer accessories. Background Art

[0002] The power adapters of laptop computers are all external. For early laptop computers or those with high configurations, thick thicknesses, or large power consumptions, their power adapters mostly adopt a three-core socket with a triangular notch. There are live wire, neutral wire, and ground wire pins inside the socket. A three-core power cord is required to bridge between the power adapter and the wall panel or power strip. One end of the three-core power cord is connected to the socket of the power adapter, and the other end is connected to the wall panel or power strip. With the development of technology, the reduction of chip size and the improvement of integration, the current thickness of gaming laptops, netbooks, and student laptops is very thin, the weight is very light, and the power consumption is very small. The power adapters all adopt a two-core pin method. The power adapter is provided with protruding two-core pins, and the power adapter can be directly inserted into the wall panel or power strip through the two-core pins, eliminating the need for a cross-wire.

[0003] However, due to the overly simple jacks of some old wall panels or some simple power strips, some have only three holes and some have only two holes. If a multi-functional power strip is not carried at this time, it will be embarrassing to supply power to the laptop computer. For example, a power adapter with two-core pins cannot be inserted into the three-hole panel, or the plug of a three-core cross-wire cannot be inserted into the two-hole.

[0004] The technologies related to laptop computer power adapters currently also include: to prevent the pins of the plug from wearing the surface of the laptop computer during the portable process, people have improved the plug so that the pins of the plug can be folded down and retracted. To prevent the internal components of the power adapter from being damaged due to excessive temperature in summer, accessories for power adapters with cooling fans or cooling chambers have been designed. Summary of the Invention

[0005] The purpose of the present invention is to provide a versatile adapter for a laptop computer power adapter that can convert the number of pins and is suitable for use with two-core pin adapters and three-core socket adapters.

[0006] The technical problem to be solved by the present invention is achieved through the following technical scheme: the adapter includes a fixed shell 1, a rotating hub 3, a hub seat 4, a triangular recess 5, a triangular rib 6, a neutral wire pin 7, a live wire pin 8, a plug cover 10, a ground wire pin 11, a convex drum 12, a rectangular hole 13, a truncated cone mouth 14, a hand pinch 15, a double spring 16, an arc column rib 17, a blocking rib 18, a slide groove 19, a slide rail 20, a spring bayonet 21, a fork-shaped spring 22, a hinge 24, a transparent cover 29, a bottom cover 34, a three-core plug 36, an arc-shaped elastic sheet 44, a vacancy 45, a pointer 46, a positioning block 47, a positioning mark 48 and a positioning groove 49.

[0007] The rotating hub 3, the hand pinch 15, the double spring 16, the blocking rib 18, the slide groove 19 and the slide rail 20 constitute a variable mechanism, the triangular recess 5, the triangular rib 6, the pointer 46 and the positioning mark 48 constitute a positioning mechanism, the neutral pin 7, the live pin 8 and the ground pin 11 are variable plugs, the upper part of the inner cavity of the fixed shell 1 is provided with a slide rail 20, the cross-sectional figure of the slide rail 20 is a lying F shape, the bottom end of the slide rail 20 is connected to the inner cavity of the fixed shell 1, and the middle part of the two feet of the slide rail 20 is provided with a spring bayonet 21, and the spring bayonet 21 is embedded with a long horizontal fork spring 22, and the inner side of one end of the two springs of the fork spring 22 is provided with a convex drum 12 and is symmetrical to each other, and the top of the fixed shell 1 is provided with a long strip of slide groove 19, close to the truncated table mouth 14 are provided with retaining ribs 18 on both sides of the slide groove 19, a positioning block 47 is provided on the top of the outer side of the rotating hub 3, a positioning groove 49 is provided in the plug cover plate 10 at the positioning block 47, and the positioning block 47 is limited to swing in the positioning groove 49. The plug cover plate 10 below the hub seat 4 is provided with two triangular recesses 5 with arrows pointing downwards, a partial vacancy 45 is provided at the bottom of the rotating hub 3, an arc-shaped elastic sheet 44 is provided on the circumference of the rotating hub 3 at the vacancy 45, and a triangular rib 6 is provided at the bottom of the arc-shaped elastic sheet 44. The triangular rib 6, the arc-shaped elastic sheet 44 and the rotating hub 3 are a whole, and the triangular rib 6 can be stuck in one triangular recess 5. When the rotating hub 3 rotates, the triangular rib 6 can be separated from its original position and enter another triangular recess 5 under the elastic action of the arc-shaped elastic sheet 44.

[0008] The ground wire pin 11 passes through the rectangular hole 13 and the fork-shaped spring piece 22. The ground wire pin 11 can slide in the rectangular hole 13 and the fork-shaped spring piece 22. On the upper surface of one end of the ground wire pin 11, there is a double spring piece 16 with an inverted chevron-shaped cross-sectional pattern. The bottom end of the double spring piece 16 is connected to the ground wire pin 11 by welding. The double spring piece 16 passes through the sliding groove 19 and can slide in the sliding groove 19. Both top edges of the double spring piece 16 are provided with arc column ribs 17. A hand grip 15 made of soft rubber is sleeved outside the arc column ribs 17. The arc column ribs 17 can reduce the wear of the top end of the double spring piece 16 on the hand grip 15, and at the same time can support the hand grip 15 to make it not easy to fall off. If the hole of the power supply panel or the wiring board has only three holes, the three-pin mode is selected. Pinch the hand grip 15 to make the inner included angle of the double spring piece 16 smaller, and it can pass through the gap between the two blocking ribs 18, and the ground wire pin 11 is completely pushed out. When the double spring piece 16 reaches one end of the sliding groove 19 close to the plug cover plate 10, release the hand grip 15. Utilize the elastic recovery of the double spring piece 16, and the inner included angle of the spring piece becomes larger, and it can be blocked by the blocking rib 18. The ground wire pin 11 is positioned by the double spring piece 16 and the blocking rib 18. If the hole of the power supply panel or the wiring board has only two holes, the two-pin mode is selected. Pinch the hand grip 15 to make the inner included angle of the double spring piece 16 smaller, and it can pass through the gap between the two blocking ribs 18, and the ground wire pin 11 can be completely retracted. When the double spring piece 16 is located at one end of the sliding groove 19 far from the plug cover plate 10, release the hand grip 15, and the ground wire pin 11 is positioned by the end point of the sliding groove 19.

[0009] Due to the adoption of the above technical solution, the advantages and positive effects of the present invention are as follows: When connecting to the wall power supply panel, the number of pins of the converter can be changed, and it can be inserted into both two-hole power supply panels and three-hole power supply panels. When connecting to the notebook power adapter, it can be used for both power adapters with two-pin plugs and power adapters with three-pin sockets. Brief Description of the Drawings

[0010] The present invention will be further described below in conjunction with the drawings and embodiments. The present invention has the following 6 drawings:

[0011] Figure 1 It is the front view cross-sectional view of the present invention,

[0012] Figure 2 It is the front view cross-sectional view of the present invention when the ground wire pin is retracted,

[0013] Figure 3 It is the top view cross-sectional view of the present invention,

[0014] Figure 4 It is the bottom view cross-sectional view of the present invention,

[0015] Figure 5 It is the left view of the present invention,

[0016] Figure 6 It is the partial enlarged view of the left view.

[0017] The numbers marked in the attached drawings respectively represent as follows:

[0018] 1. Fixed shell, 2. Two-hole socket, 3. Rotating hub, 4. Hub seat, 5. Triangular recess, 6. Triangular rib, 7. Neutral pin, 8. Live pin, 9. Long screw hole, 10. Plug cover plate, 11. Earth pin, 12. Convex drum, 13. Rectangular hole, 14. Round table opening, 15. Hand grip, 16. Bimetallic strip, 17. Arc column rib, 18. Stop rib, 19. Slide groove, 20. Slide rail, 21. Reed clip, 22. Fork-shaped reed, 23. Inner recess, 24. Hinge, 25. Outer recess, 26. Wire, 27. Solder joint, 28. Aluminum bottom plate, 29. Transparent cover, 30. Card holder, 31. Rotatable shell, 32. Short screw seat, 33. Short screw, 34. Bottom cover plate, 35. Tube spring, 36. Three-core plug, 37. Socket, 38. Adhesion part, 39. Card foot, 40. Unlock button, 41. Reinforcing step, 42. Long screw, 43. Long screw seat, 44. Arc-shaped elastic piece, 45. Vacancy, 46. Pointer, 47. Positioning block, 48. Positioning mark, 49. Positioning groove, D. Light-emitting diode, R. Current-limiting resistor. Specific implementation mode

[0019] 1. The adapter includes a fixed shell 1, a two-hole socket 2, a rotating hub 3, a hub seat 4, a triangular recess 5, a triangular rib 6, a neutral pin 7, a live pin 8, a long screw hole 9, a plug cover plate 10, an earth pin 11, a convex drum 12, a rectangular hole 13, a round table opening 14, a hand grip 15, a bimetallic strip 16, an arc column rib 17, a stop rib 18, a slide groove 19, a slide rail 20, a reed clip 21, a fork-shaped reed 22, an inner recess 23, a hinge 24, an outer recess 25, a wire 26, a solder joint 27, an aluminum bottom plate 28, a transparent cover 29, a card holder 30, a rotatable shell 31, a short screw seat 32, a short screw 33, a bottom cover plate 34, a tube spring 35, a three-core plug 36, a socket 37, an adhesion part 38, a card foot 39, an unlock button 40, a reinforcing step 41, a long screw 42, a long screw seat 43, an arc-shaped elastic piece 44, a vacancy 45, a pointer 46, a positioning block 47, a positioning mark 48, a positioning groove 49, a light-emitting diode D and a current-limiting resistor R.

[0020] 2. The rotating hub 3, the hand squeeze 15, the double reed 16, the retaining rib 18, the sliding groove 19 and the sliding rail 20 form a variable mechanism. The triangular recess 5, the triangular rib 6, the pointer 46 and the positioning mark 48 form a positioning mechanism. The positioning block 47 and the positioning groove 49 form a limiting mechanism. The fixed shell 1 and the rotatable shell 31 form the main body of the outer shell, and their wall thicknesses are equal. The fixed shell 1 and the rotatable shell 31 are movably connected by a hinge 24. The rotatable shell 31 can rotate around the hinge 24. The wall thicknesses of the fan-shaped outer recess 25 on the fixed shell 1 and the fan-shaped inner recess 23 on the rotatable shell 31 are both half of the wall thickness of the fixed shell 1. The inner recess 23 can be screwed into the outer recess 25. The fixed shell 1, the rotatable shell 31, the plug cover plate 10 and the bottom cover plate 34 and their structures above or inside are all made by injection molding. The neutral pin 7, the live pin 8 and the ground pin 11 are variable plugs, and the three-core plug 36 is a fixed plug.

[0021] 3. According to Figures 1 to 4 , the cross-sectional shape of the fixed shell 1 is an inverted L shape. A long screw seat 43 is provided at the center of the side wall in the middle of the inner cavity of the fixed shell 1. One end of the long screw seat 43 is connected to the side wall, and the connection part is set as a reinforcing step 41. The circular edge of the opening of the fixed shell 1 is set as a frustum-shaped opening 14, and its cross-sectional shape is a flat frustum. Two-hole sockets 2 are provided on the side wall at the bottom of the inner cavity of the fixed shell 1, and they contain phosphor bronze conductive reed pieces.

[0022] 4. A sliding rail 20 is provided in the upper part of the inner cavity of the fixed shell 1. In the top view, the cross-sectional shape of the sliding rail 20 is a lying ∏ shape, and in the front view, the cross-sectional shape of the sliding rail 20 is a lying F shape. The bottom end of the sliding rail 20 is connected to the inner cavity of the fixed shell 1. Spring clip slots 21 are provided in the middle of both feet of the sliding rail 20. Long strip-shaped transverse fork-shaped spring pieces 22 are embedded in the spring clip slots 21. Convex drums 12 are provided on the inner sides of one ends of the two spring pieces of the fork-shaped spring piece 22 and are symmetrical to each other. A long strip-shaped sliding groove 19 is provided on the top of the fixed shell 1. Retaining ribs 18 are provided on both sides inside the sliding groove 19 close to the frustum-shaped opening 14.

[0023] 5. According to Figure 1 , Figure 5 and Figure 6 , a circular plate-shaped plug cover plate 10 is provided in the frustum-shaped opening 14. A long screw hole 9 is provided at the center of the plug cover plate 10. The plug cover plate 10 is connected to the long screw seat 43 through the long screw hole 9 and the long screw 42. Two symmetrical hub seats 4 are provided on the inner wall of the lower part of the plug cover plate 10. A rotating hub 3 is embedded in the hub seats 4. The cross-sectional shape of the rotating hub 3 is a lying I shape. The rotating hub 3 can rotate in the hub seats 4. A positioning block 47 is provided at the top of the outside of the rotating hub 3. Two positioning marks 48 are provided on the outer wall of the plug cover plate 10 at the position of the positioning block 47. A positioning groove 49 is provided in the body of the plug cover plate 10 at the position of the positioning block 47. The positioning block 47 is limited to swing in the positioning groove 49. Two downward-pointing triangular recesses 5 are provided on the plug cover plate 10 below the hub seats 4.

[0024] 6. The bottom of the rotating hub 3 is provided with a partial vacancy 45, that is, it is vacant near the outer side and a complete cylindrical shape near the inner side. An arc-shaped elastic piece 44 is provided on the circumference of the rotating hub 3 at the vacancy 45. A triangular rib 6 is provided at the bottom end of the arc-shaped elastic piece 44. The triangular rib 6, the arc-shaped elastic piece 44 and the rotating hub 3 are an integral body and are made by injection molding. The triangular rib 6 can be stuck in a triangular recess 5. When the rotating hub 3 rotates, under the elastic action of the arc-shaped elastic piece 44, the triangular rib 6 can break away from its original position and enter another triangular recess 5. A neutral pin 7 and a live pin 8 are respectively inserted into the two rotating hubs 3.

[0025] 7. The upper part of the plug cover plate 10 is provided with a rectangular hole 13. A ground pin 11 is inserted through the rectangular hole 13 and the fork-shaped spring piece 22. The ground pin 11 can slide in the rectangular hole 13 and the fork-shaped spring piece 22. The convex drum 12 on the fork-shaped spring piece 22 makes the contact between the ground pin 11 and the fork-shaped spring piece 22 good, ensuring the reliability of conduction. On the upper surface of one end of the ground pin 11, there is a double spring piece 16 with an inverted herringbone cross-sectional pattern. The bottom end of the double spring piece 16 is connected to the ground pin 11 by welding. The double spring piece 16 passes through the sliding groove 19 and can slide in the sliding groove 19. Both top edges of the double spring piece 16 are provided with arc-shaped rib columns 17. A hand pinch 15 made of soft rubber is sleeved outside the arc-shaped rib columns 17. The arc-shaped rib columns 17 can reduce the wear of the top end of the double spring piece 16 on the hand pinch 15, and at the same time can support the hand pinch 15 so that it is not easy to fall off.

[0026] 8. A double-track-shaped card seat 30 is provided inside the top corner on one side of the rotatable shell 31. An aluminum bottom plate 28 is embedded in the card seat 30. An LED D and a current-limiting resistor R are provided on the aluminum bottom plate 28. The LED is used for power-on indication. A transparent cover 29 is provided outside the LED. The cross-sectional pattern of the transparent cover 29 is triangular, and several small convex points are provided on its inner wall to make the light of the LED become diffused light. The transparent cover 29 is stuck on the rotatable shell 31 at the above-mentioned top corner. The LED can be seen emitting light above and on three sides of the transparent cover 29, so there is a relatively wide viewing range. Four short screw seats 32 are provided on the inner wall at the bottom of the rotatable shell 31.

[0027] 9. Two card feet 39 are provided on one side edge of the bottom cover plate 34. The card feet 39 can be stuck by the unlocking button 40 on the fixed shell 1. The bottom cover plate 34 is connected to the short screw seats 32 by short screws 33. A three-core plug 36 is provided below the bottom surface of the bottom cover plate 34. The top of the three-core plug 36 is connected to the bottom cover plate 34. A small part of the inner tube spring 35 of the socket 37 passes upward through the bottom cover plate 34.

[0028] 10. According to Figure 3 and Figure 4, one end of the neutral pin 7, the live pin 8 and the fork-shaped spring piece 22 are respectively connected to the three pipe springs 35 of the three-core plug 36 through the wire 26 and the solder joint 27. And the neutral pin 7 and the live pin 8 are respectively connected to one end of the light-emitting diode D and the current-limiting resistor R through the wire 26 and the solder joint 27. The other ends of the light-emitting diode D and the current-limiting resistor R are connected to each other; and the neutral pin 7 and the live pin 8 are respectively connected to the phosphor bronze conductive spring pieces in the two-hole socket 2 through the wire 26 and the solder joint 27.

[0029] 11. When in use, the connection method between this adapter and the adapter is as follows: Insert the three-core plug 36 (with a plug shape on the outside and a socket inside) of this adapter into the triangular adapter socket (with a socket shape on the outside and a pin inside); or press the unlocking button 40, lift the rotatable shell 31 upwards, and insert the adapter with the two-shaped pins into the two-hole socket 2 of this adapter.

[0030] 12. The connection method between this adapter and the power panel or the power strip is as follows: Select the pin mode according to the actual situation. If the holes on the power panel or the power strip are only three holes, then select the three-pin mode. Rotate the neutral pin 7 and the live pin 8 respectively by hand so that they are both in an inclined state. Pinch the hand grip 15 to make the inner included angle of the double spring piece 16 smaller, and it can pass through the gap between the two ribs 18, and completely push out the ground pin 11. When the double spring piece 16 reaches the end of the chute 19 close to the plug cover plate 10, release the hand grip 15. Utilize the elastic recovery of the double spring piece 16, and the inner included angle of the spring piece becomes larger and can be blocked by the rib 18. At this time, the ground pin 11 is positioned by the double spring piece 16 and the rib 18, and the pins are three pieces, and the variable plug can be inserted into the three holes of the power panel or the power strip.

[0031] 13. If the holes on the power panel or the power strip are only two holes, then select the two-pin mode. Rotate the neutral pin 7 and the live pin 8 respectively by hand so that they are in a parallel state. Pinch the hand grip 15 to make the inner included angle of the double spring piece 16 smaller, and it can pass through the gap between the two ribs 18, and the ground pin 11 can be completely retracted. When the double spring piece 16 is located at the end of the chute 19 far from the plug cover plate 10, release the hand grip 15. At this time, the ground pin 11 is positioned by the end point of the chute 19, and the pins are two pieces, and the variable plug can be inserted into the two holes of the power panel or the power strip.

[0032] 14. To make the attached drawings concise, Figure 1 and Figure 2 do not show the light-emitting diode D and the current-limiting resistor R on the aluminum base plate 28, and the wiring is not drawn. Figure 3 and Figure 4 The light-emitting diode D in does not use a physical diagram, but is represented by a symbol to avoid drawing the circuit schematic diagram again.

[0033] 15. The pointer 46 and the positioning mark 48 facilitate the identification of the rotation direction and the positioning position when the rotating hub 3 and the pins are rotating. The materials of the fixed shell 1, the plug cover plate 10, the rotatable shell 31, and the bottom cover plate 34 are engineering plastics, and the thickness of each is 0.8 mm. The triangular ribs 6, the arc-shaped elastic piece 44, and the rotating hub 3 are injection-molded into one body, and the material is nylon. The materials of the double spring piece 16 and the fork-shaped spring piece 22 are phosphor bronze. The thickness of the double spring piece 16 is 0.6 mm, and the thickness of the fork-shaped spring piece 22 is 0.5 mm. The light-emitting diode D and the current-limiting resistor R are both in the form of patches. The light-emitting color of the light-emitting diode is white light, and the resistance value of the current-limiting resistor R is 180 KΩ. To prevent the rotatable shell 31 from breaking the wire when rotating, a part of the wire 26 can be in the form of an Ω-shaped arch or a spring-shaped coil.

Claims

1. An adapter for a laptop power adapter, comprising a fixed shell (1), a rotating hub (3), a hub seat (4), a triangular recess (5), a triangular rib (6), a neutral pin (7), a live pin (8), a plug cover (10), a ground pin (11), a convex drum (12), a rectangular hole (13), a truncated cone mouth (14), a hand pinch (15), a double spring (16), an arc column rib (17), a blocking rib (18), a slide groove (19), a slide rail (20), a spring bayonet (21), a fork-shaped spring (22), a hinge (24), a transparent cover (29), a bottom cover (34), a three-core plug (36), an arc-shaped elastic sheet (44), a vacancy (45), a pointer (46), a positioning block (47), a positioning mark (48) and a positioning groove (49); Features: The rotating hub (3), the hand pinch (15), the double spring (16), the blocking rib (18), the slide groove (19) and the slide rail (20) constitute a variable mechanism, the triangular recess (5), the triangular rib (6), the pointer (46) and the positioning mark (48) constitute a positioning mechanism, the neutral wire pin (7), the live wire pin (8) and the ground wire pin (11) are variable plugs, the upper part of the inner cavity of the fixed shell (1) is provided with a slide rail (20), the cross-sectional figure of the slide rail (20) is a lying F shape, the bottom end of the slide rail (20) is connected to the inner cavity of the fixed shell (1), the middle part of the two feet of the slide rail (20) is provided with a spring bayonet (21), the spring bayonet (21) is embedded with a long horizontal fork spring (22), and the inner side of one end of the two springs of the fork spring (22) is provided with a convex drum (1 2) and are symmetrical with each other, a long strip-shaped slide groove (19) is provided on the top of the fixed shell (1), and blocking ribs (18) are provided on both sides of the slide groove (19) near the truncated table mouth (14), a positioning block (47) is provided on the top of the outer side of the rotating hub (3), a positioning groove (49) is provided in the plug cover plate (10) at the positioning block (47), and the positioning block (47) is limited to swing in the positioning groove (49), and two triangular recesses (5) with arrows pointing downward are provided on the plug cover plate (10) below the hub seat (4), and a partial vacancy (45) is provided at the bottom of the rotating hub (3), and an arc-shaped elastic sheet (44) is provided on the circumference of the rotating hub (3) at the vacancy (45), and a triangular rib (6) is provided at the bottom end of the arc-shaped elastic sheet (44), and the triangular rib (6), the arc-shaped elastic sheet (44) and the rotating hub (3) is an integral body, the triangular rib (6) can be stuck in one triangular recess (5), when the rotating hub (3) rotates, the triangular rib (6) can be separated from its original position and enter into another triangular recess (5) under the elastic action of the arc-shaped elastic sheet (44), a ground wire pin (11) is inserted into the rectangular hole (13) and the fork-shaped spring sheet (22), and the ground wire pin (11) can slide in the rectangular hole (13) and the fork-shaped spring sheet (22), a double spring sheet (16) with an inverted herringbone cross-section is provided on one end of the ground wire pin (11), the bottom end of the double spring sheet (16) is connected to the ground wire pin (11) by welding, the double spring sheet (16) passes through the slide groove (19) and can slide in the slide groove (19), and the two top edges of the double spring sheet (16) are both set as arc column ribs (17), The arc column rib (17) is covered with a soft rubber hand grip (15) on the outside. The arc column rib (17) can reduce the wear of the top of the double spring (16) on the hand grip (15), and can also support the hand grip (15) to prevent it from falling. If the power panel or the wiring board has only three holes, a three-pin mode is selected. The hand grip (15) is pinched to reduce the inner angle of the double spring (16), and the ground pin (11) can pass through the gap between the two blocking ribs (18) to completely push out. When the double spring (16) reaches the end of the slide groove (19) close to the plug cover plate (10), the hand grip (15) is released, and the elastic recovery of the double spring (16) is utilized. The inner angle of the spring becomes larger and can be blocked by the blocking rib (18). The ground pin (11) is positioned by the double spring (16) and the blocking rib (18).If the power panel or wiring board has only two holes, the two-pin mode is selected. The hand grip (15) is pinched to reduce the inner angle of the double spring (16) so that it can pass through the gap between the two blocking ribs (18) and the ground wire pin (11) can be fully retracted. When the double spring (16) is located at the end of the slide groove (19) away from the plug cover (10), the hand grip (15) is released and the ground wire pin (11) is positioned at the end of the slide groove (19).

2. The adapter for a laptop power adapter according to claim 1, characterized in that: The cross-sectional shape of the fixed shell (1) is an inverted L-shape, the cross-sectional shape of the slide rail (20) is a lying ∏-shape, the cross-sectional shape of the rotating hub (3) is a lying I-shape, the cross-sectional shape of the transparent cover (29) is a triangle, the fixed shell (1) and the rotatable shell (31) are movably connected via a hinge (24), and the top of the three-core plug (36) is connected to the bottom cover plate (34).

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